section Home
Production, Amateur
Radio amateur
Model aircraft, rocket-
Useful, entertaining 		Stealth master
Electronics
Physics
Technologies
invention 		space Mystery
Earth Mysteries
Secrets of the Ocean
Stealth
section Map
Start
Forum
Use of material is permitted for reference (for websites - hyperlinks)
INVENTION
Russian Federation Patent RU2275556

METHOD FOR POWER SYSTEM closed liquid

METHOD FOR POWER SYSTEM closed liquid

Name of the inventor: ROFFELSEN Franciscus (NL)
The name of the patentee: SPIRO RESEARCH BV (NL)
Address for correspondence: 129010, Moscow, ul. Boris Spassky, 25, p.3, Ltd. "Gorodissky and Partners", pat.pov. S.A.Dorofeevu
Starting date of the patent: 2002.03.28

The method is intended for use in district heating systems, heat exchangers and other systems. Automatically closed system power source from the fluid is performed by providing a source of liquid supply system and the auxiliary drive, formed from liquid, while the liquid is allowed only for the direction of feed of the auxiliary drive, and from there to the closed liquid system liquid transport is only permissible dropwise. Feed buffer implemented by means of a cylindrical drip feed device having an inlet, an outlet and a free moving plunger, which can cover the inlet opening in the adjacent position while leaving clear, tiny passage for leakage and provided with a channel with non-return valve in the direction inlet. Heating system through drip device is connected to a source of pressurized fluid. The invention provides an automatic and closed circulating fluid flow, but also facilitates the detection of leaks.

DESCRIPTION OF THE INVENTION

The present invention relates to a method for automatically feeding a closed liquid system, such as the type of central heating system or another heat exchange system or system process heat consumption, designed as a closed liquid system from a liquid source according to need, and the feed buffer is created in the system, formed of liquid between the liquid source and the feed buffer only liquid flow is permitted in the feed direction of the auxiliary drive. The invention concerns a drip and supply device which can be used to implement such a method and heating system that utilizes the method and the drip feeder.

The method described above is known from WO-A-00/19149. In deaerizatsionnoy chamber contains fluid supply, which is replenished in accordance with the needs of the float through the control valve from a liquid source, particularly from a public water supply system. When this method is necessary to provide for power, whatever the circumstances, that from the closed liquid system no liquid can find its way into the source from which the power, e.g., due to the pressure increase in the liquid system or a pressure reduction or interruption in the pressure fluid source. and should ensure that in the event of an accident such as a pipe fracture in the liquid system, the supply was disconnected from the fluid source, at least in large part, to the accident has not yet become heavier.

Tasks will be discussed in more detail, by way of example, with respect to a central heating installation. Such closed liquid circulation systems with changes in temperature and pressure often uses an expansion tank, so that in case of temperature fluctuations the expansion and contraction of the closed liquid volume can be overcome without excessive pressure increase. Furthermore, in such a closed liquid circulation system occur, in particular when a central heating installation is involved, loss of liquid from the closed system, which can hardly be excluded. In this case of the closed system can flow away so much liquid that the leakage becomes clearly visible and can therefore be eliminated. When the amount is less localization of leakage can hardly be detected or can be detected only with great difficulty. Furthermore, liquid leakage quantity can be so small that the liquid fully evaporates nearly immediately, in which case the leakage losses are involved exudation liquid which hardly can be followed, if at all possible. In carrying out long-term measurements in the heating system 40 kW found that these non-traceable loss of leak fluid exudation of approximately 0.8 cm 3/24 hours, which corresponds to about 300 cm 3 in one heating season.

Leaking water with or without detection, it is possible to some extent to collect via expansion tank, which can be regarded as a replenishment source, but in this case, as a related or limited only replenishing source. If this source is exhausted, then for further leakage the pressure in the closed fluid circulation system can rapidly fall in case of falling below a specific pressure, for instance when the pressure in the heating installation falls to atmospheric pressure, leads to an automatic stop system. For the installation of central heating it can have disastrous consequences, for instance during a frosty night. This can be prevented by feeding method is known from the patent WO-A-00/19149. However, this method requires specially stipulated conditions in order to prevent, as discussed above, the flow of fluid back from the closed liquid system to the liquid source, and of course, primarily to prevent the free flow of liquid in the case, for instance, pipe fracture in the closed liquid system from virtually unlimited fluid power, municipal water supply system.

The object of the invention is to provide a method with which a closed liquid system is supplied automatically from a liquid source according to need, without incurring the risk that liquid can find its way from the liquid system into the liquid source, and wherein and ensures that in case of failure in the liquid system fluid will not pass without restriction from the liquid source to the liquid system.

A further object of the invention is to provide a method with which a predetermined limited amount of liquid can be immediately fed to the liquid system.

The object of the invention is to provide a drip feeder with which can be advantageously implemented method as mentioned above and therefore this drip feeder can automatically replenish minor amount of fluid leakage from the closed circulating system, in accordance with the needs of a substantially unlimited source such as municipal water supply system, and without the occurrence of reflection, or the smooth release of the risk.

A further object of the invention is to provide a closed liquid circulation system, which, by utilizing such a drip feed device can automatically maintain a pressurized, while, moreover, it is possible to ensure that when there is a leak, defined and limited amount of liquid can be instantaneously sent to facilitate detection of the leak location, and after the release of a limited amount of liquid the automatic feed does not lead to a continuous release of additional water.

By arranging according to the invention in a method for automatically feeding a closed liquid system from a liquid source according to need, so that between the liquid source and the closed feed system creates the auxiliary drive fluid and from the feed buffer to the closed liquid system allowed the transport of liquid only dropwise, provided that the fluid system can be continuously fed from the liquid source, while at the same time provided that the displacement fluid back to the auxiliary drive liquid always limited and backflow of liquid completely expelled to the liquid source. Then ensured that despite the fact that during normal operation can allow a continuous and uncontrolled flow of liquid from the liquid source, by decreasing the pressure or interruption in the pressure fluid system, for example, as a result of a pipe fracture, from the liquid source can more leak liquid only dropwise until yet been found that the supply is completely suppressed in other ways, such as through the valve.

Then feed buffer can be in open communication with the liquid system, therefore actually forms part. In this case the feed buffer can be subject to pressure fluctuations, and according to a further embodiment of the invention, preferably a feed buffer has a minimum volume, which is increased when the pressure in the feed buffer exceeds the pressure in the liquid source. Thus, it provided the opportunity for the expansion of the supply of the auxiliary drive and may be further arranged so that the increase in the supply of the auxiliary drive means limited to drain safety overpressure.

Since the liquid can be emitted feed buffer only dropwise, an effective safety actually obtained by means of flow, but the amount of liquid that can be added to the system per unit of time is limited. If it is considered desirable that in a relatively short period of time can be put into a large amount of a liquid system, it can be realized according to a further embodiment of the invention if between the feed buffer and the closed liquid system set fluid supply, which is fed via an open connection through dropwise transport from the feed and auxiliary drive which is connected with the liquid system via a sealable passage, while the opening and closing of the channel is controlled according to the values ​​produced by the closed liquid system.

To implement the invention can be advantageously used feed buffer that is located in a drip feed device secured cylindrical housing with an inlet, an outlet and a substantially cylindrical plunger arranged in the housing so that it can move freely, wherein the plunger is provided at least a first portion mounted in a cylindrical housing with sliding fit and a second portion having a smaller diameter than the first portion can close the outlet in an abutting position while leaving clear a tiny passage for leakage and provided with a channel that can connect an inlet with a space in the housing around the second portion, and provided with a nonreturn valve preventing flow from the space to the inlet. With these measures is obtained drip feeder, wherein, when connected to a pressurized fluid source, such as the public water supply system, the plunger is in the abutting position by fluid pressure, with a tiny passage for leakage of such a construction that it passes the liquid only dropwise, in limited quantities. Thus, small leakage losses are replenished with liquid exudation automatically and continuously. If there was a big accident such as a break of the pipe, which led to a break in the supply pressure at the outlet of the drip feed device, this drip feeder, however, continues to deliver liquid only dropwise, so that the effects of a pipe fracture can not be worse from -this continuous supply of large quantities of make-up fluid. If there is a reverse, i.e. a higher pressure at the outlet than at the inlet, for example in case of a temporary pressure reduction or interruption in the pressure replenished source, the non-return valve prevents the passage of liquid through the valve and thus finding the path a replenishing source via the inlet, even if the pressure difference between the outlet and the inlet increases nastolno that the plunger is pushed in the direction of the inlet opening, and a tiny leak passage turns into a wider open connection.

The implementation and proper sizing of the tiny passage for leakage and maintaining it in a state with defined sizes depend, among other things, the manner in which the second portion of the plunger cooperates with the outlet. To optimize this interaction is possible, in accordance with a further embodiment of the invention, wherein the second plug portion is extended by a pin-shaped projection disposed at the center, which by a sliding fit, engages a bore forming part of the outlet and is provided near the junction with the second portion of the annular groove , which is connected with at least a longitudinal groove extending in the longitudinal direction of the rod-shaped projection. Through these measures are implemented as current guidance plunger in the housing, and a decrease in the outlet to the required size.

Tiny passage for leakage can be realized in many ways. These examples may be extremely fine grooves in one and / or both cooperating end faces of the second portion of the plunger and the end wall of the housing. However, according to a further embodiment of the invention it is particularly advantageous when the rod-shaped projection connects to the second portion of the plunger through the base portion and terminates in a free end, with an annular seal disposed around the base portion and a free end in an adjacent second portion position in contact with the working cam surface adjustment member, which can move relative to the rod-shaped projection and, when moved, can shift the plunger via the pin-shaped projection in the longitudinal direction. Thanks to these measures derived design, with which you can accurately adjust the degree of leakage, and therefore, the width of the tiny passage for leakage. Typically, the O-ring is pressed against the plunger in sealing position relative to the end wall of the housing. However, the adjusting element can be wrung out back the plunger, whereby the initially more flattened sealing ring increasingly begins to take again its original shape more rounded. Currently, this leads to the fact that the O-ring no longer seals completely carries and releases minuscule leakage passages. The width of the leakage passages to be thus obtained, together forming a tiny passage for leakage can be precisely controlled by means of the adjusting member.

As stated above, during use of the drip feeder the plunger is pushed into the adjacent position by fluid pressure from the replenishing source. To make sure that in case of a temporary pressure reduction or interruption in the pressure in the plunger and to replenish the source will be maintained in its abutting position, the plunger has an additional force to act toward the adjacent position. This can be easily realized if according to a further embodiment of the invention the plunger is pressed into the abutting position by a spring, which rests on the plunger, on the one hand, and on the limiting portion which is fixedly connected to the housing, on the other hand, in this connection can be further preferred, limiting portion to be adjusted relative to the housing.

According to a further embodiment, a relatively easy way it is possible to realize a very effective non-return valve if it is formed by an annular groove in the outer surface of the second portion of the plunger and this groove is provided with side edges and a base, and it is opened at least a channel communicating with the inlet port and sealed at a distance from the base of the sealing ring adjacent to the side edges. Moreover, by further designing the side edges of the groove such that they can be adjusted relative to each other, the opening pressure of the non-return valve can be optimally adjusted, for example, so that the non-return valve is opened at a pressure in the inlet that is only a little higher than the pressure in the space around the second portion, while still ensuring that the non-return valve is optimally blocked if the pressure in the space exceeds the pressure in the inlet. and a non-return valve can be adjusted to a higher opening pressure, for example, if you want the maximum liquid supply pressure added to the liquid circulation system is lower than the pressure in the inlet.

The foregoing has been noted that it is desirable, or may even be required because of government regulations, that no liquid can be pressed from the liquid circulation system into the replenishing source for this purpose the non-return valve present is a very effective means. If the fluid system, due to unexpected reasons such as failure of the safety valve overpressure, there is high pressure in the fluid circulation system, while the plunger is pressed in the direction of the inlet a predetermined distance, whereby, for example, rod-shaped projection could leave its guiding means, while the system pressure relief may advantageously be implemented using a drip feed device according to the invention if according to a further embodiment, the housing is provided with an outlet, which sealingly closes the first portion of the plunger when the second plunger portion located in the adjacent position and which is released after a predetermined movement of the plunger towards the inlet.

The invention and relates to the heating system provided by the closed liquid circulation system, which has at least a boiler and an expansion tank, and that a closed liquid circulation system is connected via a drip feeder according to the invention to a liquid source under pressure. Furthermore extreme emergencies, thus obtained a heating system which does not become inoperative due to lack of water resulting from too low a system pressure and hence automatic shutdown.

To detect a leak in the fluid circulation system can be very advantageous if the amount of fluid flowing from the leakage, such that the location of the leakage becomes clearly visible. In accordance with a further embodiment of the invention can facilitate such monitoring, if the outlet of drip feed device is in open communication with the replenishing line for the closed liquid circulation system, and with the inlet opening of the container for storage of makeup water, with replenishing line connected to an inlet replenishing member, which is in open communication with the liquid circulation system, and is provided with an inlet valve which is normally in a closed position, but opens in case of lack of water in the liquid circulation system. With these measures in the storage container can contain a certain amount of the available fluid under a certain pressure, which can be submitted instantly in the fluid circulation system when the valve opens replenishment element. Through this liquid pulse can make a noticeable leakage. Moreover, it is, however, only a momentary liquid pulse, as the pulse supply stop if the storage container was released and additional replenishment only through drip feeder. Thus, the leak can be made visible, but, in addition, prevented the excessive length of the leak of the liquid circulation system through this process, making it visible.

A drip feeder and the heating system of the invention will now be discussed in more detail with reference to embodiments shown in the drawings, but solely by way of non-limiting examples. In these drawings,

METHOD FOR POWER SYSTEM closed liquid

1 is a cross sectional view of a drip feed device;

Figure 2 is a detail of Figure 1 on an enlarged scale;

3 is a schematic view of the heating system.

Indicated on drip feeder 1 comprises a cylindrical housing 1 with an inlet 2 and an outlet 3. The plunger 4 is slidably mounted within the housing 1 and comprises a first portion 4a, second portion 4b and a rod-shaped projection 4c.

The first portion 4a is provided inside the accommodation chamber 5 and the inserted plate 20 with filter maintenance end of the spring 6, which further rests on the annular limiting portion 7 mounted in the housing 1 with the possibility of regulation. The outer peripheral surface of the first portion 4a moves with sliding fit along the inner wall of the cylindrical housing 1, while sealing rings 8 sealingly separate the space in the housing 1 on the left and right portion of the first space.

The second portion 4b of the plunger 4 has a smaller diameter than the first portion 4a so that a space 9 acting as a feed buffer around the second portion 4b inside the housing 1. In the outer peripheral surface of the second portion 4b the groove 10 is provided, which is open at the bottom channels 11, which extend from the chamber 5 in the first portion 4a. On the outer peripheral surface of the second portion 4b the groove 10 isolates the seal ring 12. Thus, the non-return valve is formed, because at a higher pressure in the chamber 5 than in the space 9 the O-ring 12 will move outwards and release the connection between the chamber 5 and the space 9 , while at a higher pressure in the space 9 than in the chamber 5 the O-ring 12 is pressed into the groove 10 more firmly and hence a large seal. Non-return valve opening pressure can be controlled, because one of the walls of the groove 10 is formed a nut portion end edge mounted by screwing on the remaining part of the second portion 4b, to permit displacement, and the second portion 4b is sealed annular seal 19 relative to the nut portion. The second portion 4b carries the pin-shaped projection 4c, which extends with sliding fit into a bore forming part of the outlet 3. As clearly shown in Figure 2, the rod-shaped projection 4c is provided with an annular groove 13 into which opens a longitudinal groove 14. Around the pin-shaped projection 4c and in contact, on the one hand, with a second portion 4b, and on the other hand, with the wall of the housing 15. The O-ring is provided pin-shaped projection 4c is provided with a free end in the form of a conical surface with a rather large, obtuse apex. The conical surface is in contact with the working surface 16a of cam adjustment member 16 which extends transversely of the rod-shaped projection 4c and adjustably mounted in the housing 1 in the longitudinal direction and is sealed against the annular seal 21 surrounding space.

The housing 1 is further provided an inner annular groove 17 which communicates with a drain pipe 18 leading to the surroundings.

The operation of the drip feed device.

The inlet 2 is connected via means not shown, with a source of pressurized fluid, such as the public water supply system. Through this pressure in cooperation with the force exhibited by the spring 6 the plunger is pressed to the right into the position shown in Figure 1. If the fluid pressure in the chamber 5 is higher than the fluid pressure in the space 9, this causes the sealing ring 12 moves outwards and liquid flows from the chamber 5 to the space 9. To feed a liquid circulation system connected to the outlet 3 means which is not shown, liquid will have to be able to flow from the space 9 acting as a feed buffer, a discharge port 3, and therefore will have to pass through the seal ring 15. This is made possible by the formation of tiny leak passage at the location of the annular seal 15 through push back the plunger 4 via the adjusting element 16 so that the O-ring 15 is attenuated, that is, springs back from its flatter sealing configuration into a rounded configuration so that along the sealing ring minuscule passages are formed for leak. The fluid flowing through it, finds its way into the circumferential groove 13 and flows along the longitudinal groove 14 to the outlet 3. The adjusting member 16 is implemented in such a way that when it is properly regulating liquid is added dropwise. When applying liquid to the liquid circulation system the pressure in the space 9 is reduced and then again carried refill the chamber 5 through the non-return valve.

If owing to special circumstances the liquid pressure in the outlet 3 exceeds the liquid pressure in the space 9, the non-return valve prevents liquid from entering the chamber 5 from the space 9. If the pressure difference between the outlet 3 and the inlet 2 increases so much that the plunger 4 is pushed fully to the left that is, in the direction of the inlet 2, then after a specific movement of the plunger 4 the space 9 will be connected with the annular groove 17 and the pressure will descend through the outlet 18.

Figure 3 shows a heating system comprising a closed liquid circulation system 22 with the lines 22a, 22b of heating radiators and boiler 22c. The expansion tank 24 without a membrane connected to a liquid circulation system 22 through the air reservoir 23, mounted member 25 provided with a valve 26 and augmentation deaerizatsionnym valve 27. Valves 26 and 27 are normally closed and can be opened by a float in the expansion tank 24, in while, due to a drop of liquid level in the expansion tank 24 as a result of fluid leaks from the closed fluid circulation system 22, it descends together with the float deaerizatsionny open valve 27 after reaching a first level and replenishing valve 26 in case of further lowering to the second level. To replenish valve 26 is connected to replenish the line 28 which is in open communication, on the one hand, with the drip feeder 29 connected to the line 30 of the public water supply system and on the other hand, with the container 31 for storage.

Due to losses in the leakage fluid exudation float in the expansion tank 24 will at a given moment fall so far until the replenishing valve 26 opens and water is supplied from a container 31 for storage, after which the replenishing valve is again closed and the water withdrawn from the container 31 storage replenished again via drip feed device 29. The advantage of using the storage container 31 in combination with the drip feeder 29 is that in spite of the dropwise supply of the liquid, a certain stock of make-up liquid under high pressure is always immediately available. This amount of liquid immediately available if an accident occurs, such as accidental lack of water. The limited edition of the storage container 31 prevents further damage and through the momentum of the liquid immediately shows the location where it should be repaired.

It goes without saying that within the invention as defined in the appended claims, many more modifications are possible, and modifications. Thus, the invention has been explained above in relation to the central heating installation. However, just as it is possible to use in other liquid systems and production processes, in which, inter alia, requires the supply of relatively small quantities of liquid, for example, to resist leakage or loss of fluid exudation, or providing additives. If capable of supplying enough dropwise feed buffer or a drip feeder may be in open communication with the liquid system. If during certain periods, the supply of large quantities of liquid than drip feed can provide, we can ensure the use of liquid stock, leading him to open communication with the liquid system in the required times, the reserve is created and updated by a drip feed.

CLAIM

1. A method for automatically feeding a closed liquid system from a liquid source according to need, including the formation of the auxiliary drive fluid supply and admission of fluid flow between the fluid source and the feed buffer only in the feed direction of the auxiliary drive, characterized in that the feed buffer formed between the source and the closed liquid system liquid and the transfer liquid from a supply of the auxiliary storage device into the closed liquid system only dropwise allowed.

2. A method according to claim 1, characterized in that the feed buffer has a minimum volume, which is increased when the pressure in the feed buffer exceeds the pressure in the liquid source.

3. The method of claim 2, wherein the increase in the supply of auxiliary drive means is limited by a safety drain overpressure.

4. A method according to any one of the preceding claims, characterized in that between the feed buffer and the closed liquid system a liquid stock created, which is fed via an open connection through the transfer of the drip feed and the auxiliary drive which is connected with the liquid system via a closable passage, while the opening and closing the channel controlled depending on the values ​​produced by the closed liquid system.

5. A drip feeder, provided by a cylindrical housing with an inlet, an outlet and a substantially cylindrical plunger mounted in the housing so that it can move freely, wherein the plunger is provided with at least a first portion mounted in a cylindrical housing with a sliding landing and a second portion having a smaller diameter than the first portion can close the outlet in an abutting position while leaving open a tiny passage for leakage and provided with a channel that can connect the inlet with the space of the supply of the auxiliary drive in a housing around the second section, said auxiliary feed storage space connected to the outlet for passage through tiny leaks, and provided with a nonreturn valve preventing flow from the space to supply the auxiliary drive inlet.

6. A drip feeder according to claim 5, characterized in that the second elongate portion of the plunger rod protrusion means disposed in the middle, which extends with sliding fit into a bore forming part of the outlet opening, wherein on a ledge near the place of its connection with the second plunger portion an annular groove which is connected to at least a longitudinal groove extending in the longitudinal direction of the rod-shaped projection.

7. A drip feeder according to claim 6, characterized in that the rod-shaped projection connects to the second plunger portion with a base portion and terminates in a free end with an annular seal mounted around the base portion and the free end in the abutting position of the second portion in contact with the working cam surface adjustment member, which can move relative to the rod-shaped projection and can move when moving the plunger through a rod-shaped projection in the longitudinal direction.

8. A drip feeder according to claim 5, characterized in that the plunger is pressed into the abutting position by a spring, which rests on the plunger on one side and on the limiting portion which is permanently attached to the housing, on the other hand.

9. A drip feeder according to claim 8, wherein said limiting portion is configured to regulate relative to the housing.

10. A drip feeder according to claim 5, characterized in that the non-return valve is formed by an annular groove in the outer surface of the second portion of the plunger and this groove is provided with side edges and a base, and it is opened at least the channel communicating with the inlet hole, and is sealed at a distance from the base of the sealing ring adjacent to the side edges.

11. A drip feeder according to claim 10, characterized in that the side edges of the grooves are arranged to regulate each other.

12. A drip feeder according to claim 5, characterized in that the housing is provided with an outlet, which sealingly closes the first portion of the plunger when the second plunger portion located in the adjacent position and which is released after a predetermined movement of the plunger toward the inlet port.

13. Heating installation provided by the closed liquid circulation system, which has at least a boiler and an expansion tank, and that a closed liquid circulation system is connected via a drip feeder according to claim 5 to a source of fluid under pressure.

14. The heating system of claim 13, characterized in that the outlet of drip feed device is in open communication with the line for replenishing the closed liquid circulation system, and with the inlet opening of the container for storage of makeup water, and replenishing with a line connected to an inlet replenishing opening element which is in open communication with the liquid circulation system, and is provided with an inlet valve which is normally in a closed position, but opens in case of lack of water in the liquid circulation system.

print version
Publication date 29.01.2007gg