Method for supply of closed liquid system

FIELD: heat supply systems.

SUBSTANCE: method comprises supplying fluid from the additional collector interposed between the fluid source and the system of the auxiliary supplying collector. The supplying auxiliary collector is made of cylindrical dropping supplying device with inlet port, outlet port, and freely moving plunger that can close the inlet port providing small passage for outflow. The heating system is connected with the source of fluid under pressure through the dropping device.

EFFECT: expanded functional capabilities.

13 cl, 1 dwg

 

The present invention relates to a method of automatically feeding a closed liquid system, such as the type of Central heating system or other heat exchange systems, or systems of technological consumption of heat developed in the form of a closed liquid system, from a source of fluid in accordance with need, and in this system, created supply auxiliary drive formed from the liquid, and between the source of fluid and supply the auxiliary drive is allowed to flow only in the direction of feeding of the auxiliary drive. The invention also relates to a drip feed device, which can be used to implement this method and heating system, which uses the method and drip feeding device.

The above method is known from patent WO-A-00/19149. In diarization chamber contains a supply of liquid, which is replenished in accordance with the needs through the float control valve from a source of fluid, in particular from the municipal water supply system. With this method it is necessary to provide for food, regardless of the circumstances that of a closed liquid system, the liquid will not be able to find its way into the source from which the power is, for example, the surface is overcome pressure in a liquid system or a pressure reduction or interruption in the supply of pressure liquid source. You should also ensure that in the event of an accident, such as broken pipes in a liquid system, the flow of source fluid is shut off, at least in large part, to the failure became even harder.

Tasks will be discussed in more detail, by way of example, regarding the installation of Central heating. In such closed systems of circulation of the liquid with changes in temperature and pressure is often used in the expansion tank, so that in case of fluctuations of temperature expansion and contraction of the closed volume of liquid can be overcome without excessive increase of pressure. In addition, in such a closed system fluid circulation happen, especially when involved the installation of Central heating, fluid loss from a closed system, which can hardly be excluded. This closed system can leak a lot of fluid that leaks becomes clearly visible and therefore can be eliminated. When the number is less, containment leakage can hardly be detected or can be detected only with great difficulty. In addition, the amount of leakage may be so small that the liquid completely evaporates almost immediately, and in this case involved losses by leakage of the bleed fluid, which can hardly be traced, if this is at all possible. When performing long-term measurements in the heating installation with a capacity of 40 kW have found that these are not traceable loss leakage bleed fluid was approximately 0.8 cm3/24 h, which corresponds to approximately 300 cm3for one heating season.

Leaking water, with the discovery or without it, can to some extent be collected using the expansion tank, which can be viewed as a funding source, but in this case, as only linked or limited funding source. If this source is depleted, with further losses of pressure in the closed system of circulation of the liquid will be able to drop that in case of a fall below a certain pressure, for example, when the pressure in the heating installation falls to atmospheric pressure, leads to the automatic shutdown of the unit. For Central heating installations this can have catastrophic consequences, for example, during frosty nights. This can be prevented by way of nourishment, as it is known from patent WO-A-00/19149. However, this approach requires otherwise stipulated conditions to prevent, as discussed above, the flow of liquid from a closed liquid system, the liquid source and, of course, mainly prevent the free flow of the liquid is in the case for example, a rupture of a pipe in a closed liquid system of virtually unlimited source of fluid systems for municipal water supply.

Object of the invention is to provide a method by which a closed liquid system automatically fed from a source of fluid in accordance with the needs, without the risk that the liquid can find its way out of a liquid system to a source of fluid and which is also guaranteed that in case of an accident in a liquid system, the liquid cannot pass without restriction from a source of liquid in the liquid system.

An additional object of the invention is to provide a method by which a predetermined limited amount of liquid can be immediately filed in the liquid system.

The objective of the invention is to provide a drip feed device, which can be favorably implemented method, as mentioned above, and therefore it drip feeding device can automatically replenish small amounts of fluid seeping from a closed circulating system, in accordance with the needs of essentially unlimited source type systems for municipal water supply, and without the risk of reflection or unrestricted release is.

An additional object of the invention is to provide a closed system of fluid circulation, which, through the use of such a drip feed device, can automatically maintain pressure, while, in addition, you can ensure that when a leak occurs, a certain and limited amount of liquid can be instantly sent order to facilitate the detection of the location of the leak, and after the release of this limited number of automatic liquid supply does not lead to additional continuous release of water.

Arranging according to the invention in a method for the automatic supply of a closed liquid system from a source of fluid in accordance with the requirements between the source of fluid and a closed power system generates an auxiliary drive fluid, and from the power of the auxiliary drive in a closed liquid system allowed the transfer of liquid dropwise only, provided that the liquid system can be continuously fed from a source of fluid, while at the same time provided that the displacement of fluid back into the auxiliary drive fluid is limited and always and completely excluded the backflow of liquid to the liquid source. Then also ensured that despite the fact that during normalnogo mode operation it is possible to prevent continuous and uncontrolled flow of fluid from a source of fluid, in the case of pressure reduction or interruption in the supply pressure in the liquid system, for example, as a result of rupture of the tube, the source of the liquid can seep extra liquid just dropwise until then, until it is found that supply completely overpowers the other way, for example, through the valve.

Then supply the auxiliary drive may be in open communication with the fluid system, and in fact forms part of it. In this case, the supply of the auxiliary drive may be exposed to pressure fluctuations and, in accordance with an additional embodiment of the invention, the supply of the auxiliary drive preferably has a minimum volume, which increases when the pressure in the supply auxiliary drive exceeds the pressure in the liquid source. Thus, provided with the possibility of extension for the supply of the auxiliary drive and you can arrange it so that the increase in the supply of the auxiliary drive was limited to a drain of the safety means of the excess pressure.

Since the liquid can be emitted supply auxiliary drive dropwise only really received effective protective agent against leakage, but the amount of liquid that can be added to the system per unit of time, limited. If it is considered desirable that in a relatively short period of time can be put into the system a large amount of liquid, it can be implemented according to an additional variant of the invention, if the supply auxiliary storage device, and a closed liquid system created a reserve of liquid, which is fed through an open connection by moving dropwise from the inlet of the auxiliary drive and which is connected to the liquid system by closing the channel, while the opening and closing of the channel is controlled depending on the quantities produced by a closed liquid system.

To implement the invention can favorably be used supply auxiliary drive, which is placed at the drip feed device provided in a cylindrical housing with an inlet opening, an outlet opening and an essentially cylindrical plunger located in the housing so that it could move freely, and this plunger provided at least a first section mounted in the cylindrical housing with a sliding fit, and a second section having a smaller diameter than the first section, may close the outlet opening in the adjacent position, at the same time leaving a clean tiny passage for leakage is, and provided with a channel which may connect the inlet with the space in the housing around the second leg, and provided with a non return valve preventing flow from the space to the inlet. Thanks to these measures, obtained drip feeding device in which, when connected to a source of fluid under pressure, type systems for municipal water supply, the plunger is in the adjacent position by fluid pressure, with a tiny passage for leakage with this design is that it skips the liquid dropwise only in a limited number. Thus, a small loss on the leakage of the bleed fluid can be replenished automatically and continuously. If there was a big accident, such as rupture of the pipe, which led to the break in the pressure flow at the outlet drip feeding device, it is drip feeding device, however, continues to supply fluid to the dropwise so that the consequences of the rupture of the tube cannot become worse due to continuous supply of large quantities of make-up fluid. If there is a reversal, then there is a higher pressure at the outlet than at the inlet, for example, in the case of a temporary pressure reduction or interruption in the supply pressure in the replenishing source, irrevocable is LAPAN prevents the passage of fluid through this valve and, thus, finding a path in funding source through the inlet, even if the differential pressure between the outlet and the inlet opening is increased so that the plunger is pressed in the direction of the inlet, and a tiny passage for leakage becomes more wide open connection.

The implementation and proper sizing of the tiny passage for leakage and maintaining it in a state of defined dimensions depend, among other things, from the way the second section of the plunger communicates with the outlet. To optimize this interaction in accordance with an additional embodiment of the invention, in which the second section of the elongated plunger placed in the center of the rod-like protrusion, which, by using the sliding landing gears drilled hole, forming part of the outlet, and is provided near the connection with the second section of the ring groove, which connects at least a longitudinal groove, passing in the longitudinal direction of the rod-like protrusion. With these measures implemented as a precise alignment of the plunger in the housing, and reducing the exhaust hole to the desired size.

Tiny passage for leakage, you can implement many sposobniy example can be extremely small grooves in one or both of the interacting end surface of the second section of the plunger and the end wall of the housing. However, according to an additional variant of the invention, especially preferred is when the rod-like protrusion is connected with the second section of the plunger using a part of the base and terminates in a free end, with an annular seal placed around the site of the base, and a free end, the attached position of the second segment in contact with the working surface of the Cam of the adjusting element, which can move relative to the rod-like protrusion and, when moving, can push the plunger through the rod-like protrusion in the longitudinal direction. Thanks to these measures, the resulting design, which can be very precisely controlled degree of leakage, and therefore, the width of the tiny passage for leakage. Typically, the annular seal is pressed by the plunger in the position sealing against the end wall of the housing. However, with the adjusting element of the plunger can be squeezed back, resulting initially more tapered annular sealing increasingly again begins to take a more rounded original form. At the moment, this leads to the fact that the annular seal more does not seal completely, and releases the tiny passages for leaks. Width of aisles for leaks, which will receive the us so forming along a tiny passage for leakage, can be precisely controlled by means of the adjusting element.

As stated above, during use of drip feeding device the plunger is pushed in adjacent position by fluid pressure from a replenishing source. For full confidence that in the event of a temporary pressure reduction or interruption in the supply pressure to augment the source of the plunger will also be supported in its adjacent position, the plunger should act more power toward the adjacent position. It could be easily implemented, if according to an additional variant of the invention, the plunger is pressed in the adjacent position by a spring which rests on the plunger, on the one hand, and on the bounding area, permanently coupled to the housing, on the other hand, in connection with which it may be further preferable that the bounding area was regulated relative to the body.

According to an additional variant embodiment of the invention a relatively easy way you can implement a very effective non-return valve, if it is formed by annular grooves in the outer surface of the second leg of the plunger, and this groove is provided with side edges and a base, and in her opening which is at least the channel, communicated with the inlet hole, and sealed on the distance from the base of the sealing ring adjacent to the side edges. In addition, through additional design side edges of the groove are 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 opens when pressure in the inlet opening, which is only slightly above the pressure in the space around the second leg, at the same time still ensuring that the non-return valve optimally blocked, if the pressure in the space exceeds the pressure in the inlet hole. Also, non-return valve can be adjusted to a higher opening pressure, for example, if you want the maximum pressure of the fluid added to the system fluid circulation was lower than the pressure in the inlet hole.

In the foregoing it has already been noted that it is desirable, or may even be required due to state regulation, so that the liquid could not be squeezed out of the system fluid circulation in the funding source for this purpose, the presence of the non-return valve is very effective. If the system fluid circulation, due to unexpected reasons, such as failure of the fuse is wow overpressure valve, there is high pressure in the system fluid circulation, then the plunger is pressed in the direction of the inlet at a certain distance, resulting in, for example, rod-like protrusion may leave his guiding device, then the vent system can be favorably implemented using drip feeding device according to the invention, if, in accordance with an additional embodiment the housing is provided with a bleed hole, which sealing closes the first section of the plunger, if the second segment of the plunger is in the adjacent position, and which is released after a predetermined movement of the plunger in the direction of the inlet.

The invention also relates to a heating installation provided by a closed system of fluid circulation, in which there is at least the boiler and expansion tank, and this closed system fluid circulation connected through drip feeding device according to the invention to a source of fluid under pressure. Except for extreme emergencies, thus, the heating system, which is not unusable due to the lack of water resulting from a too low pressure in the system and, consequently, automatic off the treatment.

To detect leakage in the system fluid circulation can be very beneficial if the amount of fluid flowing from a leak, such that the location of the leak becomes clearly visible. In accordance with an additional embodiment of the invention can facilitate observation, if the outlet of the drip feed device is in open communication with and join the line for a closed system of fluid circulation, and with the inlet of the container for storing make-up water to replenish the line connected to the inlet hole of the reinforcing element, which is in open communication with the system fluid circulation, and this inlet provided with a valve which is normally in the closed position, but is opened in the absence of water in the system fluid circulation. With these measures in the storage container can contain a certain amount of available liquid under a certain pressure, which can instantly submit to the system of the circulation of the fluid when the valve opens to replenish the item. With this momentum fluid can make a noticeable leak. In addition, it is, however, only a momentary pulse of fluid, since the pulse supply stops, if Conte is ner for storage was freed, and additional replenishment is carried out only through drip feeding device. Thus, the leak location can be made visible, but, in addition, prevented excessive long-term leakage of system fluid circulation through this process, making it visible.

Drip feeding device and the heating system according to the invention will now be discussed in more detail with reference to embodiments of shown on the drawings, but solely by means of non-limiting examples. On these drawings

figure 1 represents a cross section of a drip feed device;

figure 2 is a detail figure 1 on an enlarged scale;

figure 3 is a schematic representation of the heating system.

Shown in figure 1 drip feeding device comprises a cylindrical housing 1 with an inlet 2 and the outlet 3. The plunger 4 moving image is installed inside the housing 1 and contains the first section 4A, the second section 4b and rod-like protrusion 4C.

The first section 4A is provided inside the chamber 5, with the inserted plate 20 of the filter, keeping the end of the spring 6, which is additionally supported on the ring restrictive section 7, mounted in the housing 1 with the possibility of regulation. The outer peripheral surface is of the first section 4A is moved with a sliding fit on the inner wall of the cylindrical body 1, while o-ring seals 8 sealing manner divides the space in the housing 1 on the left and right space of the first section.

The second section 4b of the plunger 4 has a smaller diameter than the first section 4A, so that around the second area 4b inside the housing 1 is formed a space 9, the current feed of the auxiliary drive. In the outer peripheral surface of the second section 4b provided with the groove 10, the basis of which open channels 11 that extend from the chamber 5 in the first section 4A. On the outer peripheral surface of the second section 4b of the groove 10 is sealed by a sealing ring 12. Thus, the formed non-return valve, as a higher pressure in the chamber 5 than in the space 9, the sealing ring 12 will move outward and release the connection between the camera 5 and the space 9, while at higher pressure in space 9 than in the chamber 5, the sealing ring 12 is pressed into the groove 10 harder and, therefore, with a great seal. The opening pressure of the non-return valve can be adjusted, because one of the walls of the groove 10 is formed by the end edge of the plot nuts installed by screwing on the remaining part of the second section 4b, to provide the possibility of bias, the second section 4b compacted to lavim seal 19 regarding the site of the nut. The second section 4b carries a rod-like protrusion 4C, which passes with a sliding fit in the hole, forming part of the outlet 3. As clearly shown in figure 2, rod-like protrusion 4C is provided with an annular groove 13, into which opens a longitudinal groove 14. Around the rod-like protrusion 4C and in contact, on the one hand, with the second section 4b, and on the other hand, with the wall of the housing, provided with o-ring seal 15. Rod-like protrusion 4C is provided with a free end in the form of a conical surface with a rather large, obtuse at the apex. The conical surface is in contact with the working surface 16A of the Cam of the adjusting element 16, which passes across the rod-like protrusion 4C and orderly manner is installed in the housing 1 in the longitudinal direction and is sealed relative to the surrounding space o-ring seal 21.

The housing 1 is additionally provided with an internal annular groove 17, which communicates with the drain pipe 18, leading into the surrounding space.

The following describes the operation of drip feeding device.

The inlet 2 is connected with means, not shown, with a source of fluid under pressure, for example with the municipal water supply system. Through this pressure, in cooperation with the force of the, the solidity of the spring 6, the plunger is pressed to the right in 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 leads to the fact that the sealing ring 12 is moved outward, and the fluid flows from the chamber 5 into the space 9. For submission to the system fluid circulation chamber connected with the outlet 3 way, which is not shown, the liquid will be able to flow from the space 9, the current feed of the auxiliary drive, the outlet 3, and therefore must pass through the annular seal 15. This is made possible through education tiny passage for leakage at the location of the annular seal 15 by means of push-UPS back of the plunger 4 with the adjusting element 16, so that the annular seal 15 is attenuated, that is, springs back from its more flat sealing configuration in a more rounded configuration so that along the annular seals are formed tiny passages for leaks. The fluid flowing through them, finds its way into the annular groove 13 and flows through the longitudinal groove 14 in the outlet 3. The adjusting element 16 is implemented in such a way that when it is regulating properly the liquid is supplied dropwise. When the flow of the liquid in the circulation system is hidcote the pressure in the space 9 is reduced, then again is the replenishment of the chamber 5 through the non-return valve.

If due to special circumstances, the fluid pressure in the outlet 3 will exceed the fluid pressure in the space 9, the non-return valve prevents ingress of fluid into the chamber 5 from the space 9. If the differential pressure between the outlet 3 and the inlet hole 2 will increase so that the plunger 4 is pushed to the left, i.e. in the direction of the inlet 2, after a certain movement of the plunger 4 space 9 will be connected with the annular groove 17 and the pressure will go down through the outlet 18.

Figure 3 shows a heating system containing a closed system 22 fluid circulation lines 22A, radiators 22b heating and boiler 22p. The expansion tank 24 without a membrane connected to the system 22 of the circulation of the liquid through the air tank 23, an equipped item 25, provided with a replenishing valve 26 and deaeration valve 27. The valves 26 and 27 are normally in the closed position and can be opened by the float in the expansion tank 24, while, due to the fall of the liquid level in the expansion tank 24 by a leak of fluid from the closed system 22 fluid circulation, lowered, together with the float opens deaerate the ion valve 27 after reaching the first level and replenishing valve 26 in case of further lowering to the second level. To augment the valve 26 is connected to replenish the line 28, which is in open communication with one hand, with a drip feed device 29 connected to the line 30 systems for municipal water supply, and on the other hand, with the container 31 for storage.

Due to losses in the leakage of the bleed fluid float in the expansion tank 24 will be in the moment to sink until the replenishing valve 26 will open and water will be supplied from the container 31 for storage, and then entering the valve closes again and the water is taken out of the container 31 for storage, will be added again using the drip feed device 29. The advantage of using a container 31 for storage in combination with a drip feed device 29 is that, despite the flow of the liquid drop by drop, a certain supply make-up fluid under high pressure is always immediately available. This amount of fluid is immediately available if an accident happens, for example, accidental absence of water. Limited edition from the container 31 for storing prevents additional damage to and through the impulse of the fluid immediately shows the location where there should be repaired.

Needless to say that in the scope of the invention as defined in the attached is ormula of the invention, possible even many modifications and modifications. Thus, the invention was explained above in relation to the installation of Central heating. But it is equally possible to use it in other liquid-based systems and technological processes, in which, in particular, needs to supply relatively small quantities of liquid, for example, to resist leakage, or loss of bleed fluid, or to provide additives. If enough supply dropwise supplying auxiliary drive or drip feeding device may be in open communication with the fluid system. If within a certain time period is required to apply large quantities of fluid than can provide a drip feed, you can use the stock of liquid, which is in open communication with the fluid system within the required time, and reserve created and replenished by drip feed.

1. Method of automatically feeding a closed liquid system from a source of fluid in accordance with the needs, including the formation of a liquid supply auxiliary drive and the tolerance leakage of fluid between the source of fluid and supply the auxiliary drive only in the direction of feeding of the auxiliary drive, characterized in that the form of the supply of the auxiliary drive between the source of fluid and a closed liquid system, and transfer of liquid from the inlet of the auxiliary drive in a closed liquid system is permitted only in drops.

2. The method according to claim 1, characterized in that the supply of the auxiliary drive has a minimum volume, which increases when the pressure in the supply auxiliary drive exceeds the pressure in the liquid source.

3. The method according to claim 2, characterized in that the increase in the supply of the auxiliary drive is limited to a drain of the safety means from excessive pressure.

4. The method according to any of the preceding paragraphs, characterized in that between the supply auxiliary storage device, and a closed liquid system, creating a supply of liquid, which serves through open communication through drip transfer of the electrical auxiliary drive and which is connected with the fluid system through a locked channel, while the opening and closing of the channel is controlled depending on the quantities produced by a closed liquid system.

5. Drip feeding device provided in a cylindrical housing with an inlet opening, an outlet opening and an essentially cylindrical plunger mounted in the casing so that he could move freely, and this plunger is provided with at least the first section, set in the cylindrical to the Ruse with a sliding fit, and the second section having a smaller diameter than the first section, may close the outlet opening in the adjacent position, at the same time leaving open the tiny passage for leakage, and is provided with a channel which may connect the inlet with space supply auxiliary drive housing surrounding the second area, and the specified space of the supply of the auxiliary drive is connected with the outlet through a tiny passage for leakage, and is provided with a non return valve preventing flow from the space of the supply of the auxiliary drive to the inlet.

6. Drip feeding device according to claim 5, characterized in that the second section of the elongated plunger placed in the center of the rod-like protrusion that passes with a sliding fit in the hole, forming part of the outlet, and on the ledge near the place of its connection with the second section of the plunger is made annular groove, which is connected, at least a longitudinal groove, passing in the longitudinal direction of the rod-like projection.

7. Drip feeding device according to claim 6, characterized in that the rod-like protrusion is connected with the second section of the plunger using a part of the base and free ends to the CMA with o-ring seal, established around the site of the base, and a free end adjacent the position of the second segment in contact with the working surface of the Cam of the adjusting element, which can move relative to the rod-like protrusion, and when you move, you may move the plunger through the rod-like protrusion in the longitudinal direction.

8. Drip feeding device according to claim 5, characterized in that the plunger is pressed in the adjacent position by a spring which rests on the plunger with one hand and restrictive land, fixed on the housing, on the other hand.

9. Drip feeding device of claim 8, wherein the bounding area is made adjustable relative to the body.

10. Drip feeding device according to claim 5, characterized in that the non-return valve is formed by an annular groove in the outer surface of the second leg of the plunger, and this groove is provided with side edges and a base, and it offers at least a channel communicated with the inlet hole, and sealed on the distance from the base of the sealing ring adjacent to the side edges.

11. Drip feeding device according to claim 10, characterized in that the side edges of the groove are made adjustable relative to each other.

p> 12. Drip feeding device according to claim 5, characterized in that the housing is provided with a bleed hole, which sealing closes the first section of the plunger, if the second segment of the plunger is in the adjacent position, and which is released after a predetermined movement of the plunger in the direction opuscolo holes.

13. Heating installation provided by a closed system of fluid circulation, in which are placed, at least, the boiler and the expansion tank, and this closed system fluid circulation connected through drip feeding device according to claim 5 to a source of fluid under pressure.

14. The heating installation according to item 13, wherein the outlet of the drip feed device is in open communication with and join the line for a closed system of fluid circulation, and with the inlet of the container for storing make-up water, and replenished with the line connected to the inlet hole of the reinforcing element, which is in open communication with the system fluid circulation, and this inlet provided with a valve which is normally in the closed position, but is opened in the absence of water in the system fluid circulation.



 

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