Water hammer eliminating tank
By installing a shut-off valve core and a throttling device in the water hammer elimination tank, combined with an elastic telescopic mechanism and a float valve, the problems of high cost and easy damage of existing water hammer elimination tanks are solved, achieving a lower cost and more efficient water hammer prevention effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI REDSTAR VALVE
- Filing Date
- 2025-04-28
- Publication Date
- 2026-05-15
AI Technical Summary
Existing water hammer elimination tanks are expensive and have easily damaged inner liner. Furthermore, the sealing components may not respond in time, which could lead to water ingress and affect the protective effect.
The first and second chambers are connected by an air intake and exhaust channel. The gas flow is controlled by a shut-off valve core and a throttling device to prevent gas from contacting water. Combined with an elastic telescopic mechanism and a float valve, a sensitive response is achieved, reducing maintenance costs and improving the effectiveness against water hammer.
It reduces the operation and maintenance costs of water hammer elimination tanks, improves the ability to sensitively control changes in pipeline pressure, and enhances the effectiveness and safety against water hammer impacts.
Smart Images
Figure CN224245732U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water pipeline technology, and in particular to a water hammer elimination tank. Background Technology
[0002] In water pipeline systems, when unexpected situations occur, such as a sudden stop of the delivery pump or a sudden closure of a valve in the pipeline, a transient state of rapid changes in fluid flow and pressure will occur. This phenomenon is called water hammer. When water hammer occurs, the rapid change in fluid flow in the pipe will cause the propagation of pressure waves, resulting in a rapid rise / fall in pressure within the pipe. In some cases, the pipeline may even collapse or be damaged due to the pressure waves.
[0003] To reduce or avoid losses caused by water hammer, water hammer protection devices such as water hammer elimination tanks or two-way pressure regulating towers are generally installed in the pump water delivery pipeline system. By supplying water to the pipeline to replenish pressure and absorbing water in the pipeline, the excessive pressure in the pipeline can be relieved, which can reduce the water hammer phenomenon caused by the rapid change of fluid flow in the pipeline.
[0004] Existing water hammer suppression tanks are typically pressure tanks with an elastic inner liner. They work by using pressurized compressed gas pre-filled between the inner liner and the tank body to compress the inner liner. When the external pipeline pressure is too high, the inner liner expands to absorb water; when the external pipeline pressure is low, the compressed gas compresses the inner liner to replenish water and pressurize the external pipeline, thus counteracting pressure fluctuations in the external pipeline. However, on the one hand, the inner liner needs to be made of an expensive, elastic pressure-bearing material, resulting in a high cost for the water hammer suppression tank. On the other hand, the inner liner is at risk of rupture and damage when absorbing excessive pressure in the pipeline, causing the water hammer suppression tank to fail in its protection of the pipeline.
[0005] In response, patent CN112066260B provides a pressure tank that divides the tank cavity into a first liquid chamber and a first gas chamber using a partition. The partition has through holes, and a first sealing element is used to either block or release the through holes. This pressure tank provides a tankless design to eliminate water hammer. However, in this structure, the first sealing element blocks the through holes as the liquid level rises. When filling the tank and pipelines with water, the liquid level in the first liquid chamber rises rapidly, easily causing water hammer and damaging the pressure tank. Furthermore, the sealing element may not respond quickly enough, leading to water entering the first gas chamber. Utility Model Content
[0006] This utility model provides a water hammer elimination tank, the purpose of which is to overcome the above-mentioned problems existing in the prior art.
[0007] To achieve this objective, the present invention adopts the following technical solution:
[0008] A water hammer elimination tank includes a first chamber, a second chamber, an inlet and outlet passage, a shut-off valve core, and a throttling device. The first chamber has an inlet and outlet, and the second chamber has a pressure regulating port; the second chamber is used to contain positive pressure gas. The inlet and outlet passage connects the first and second chambers. The shut-off valve core is disposed in the inlet and outlet passage; when the first chamber is filled with liquid, it closes the inlet and outlet passage. The throttling device includes a movable valve disc disposed within the inlet and outlet passage. The movable valve disc is axially movable along the inlet and outlet passage and has a throttling orifice. When the pressure in the first chamber rises, the movable valve disc remains normally closed, allowing the medium in the inlet and outlet passage to flow through the throttling orifice. When the pressure in the first chamber drops and the shut-off valve core opens the inlet and outlet passage, the movable valve disc moves open, fully opening the inlet and outlet passage.
[0009] According to the technical solution of this utility model, firstly, by setting a shut-off valve core in the air intake and exhaust channel, when the first chamber is not filled with water, the first chamber and the second chamber are connected. When the first chamber is filled with water, the shut-off valve core closes the air intake and exhaust channel between the first chamber and the second chamber. Then, the second chamber is filled with pressurized gas. At this time, the gas in the second chamber will not come into contact with the water in the first chamber during the normal operation of the water pipeline, which can reduce the dissolution and consumption of gas, thereby avoiding the need to frequently replenish the gas pressure in the second chamber of the water hammer elimination tank, making the operation and maintenance cost of the water hammer elimination tank lower.
[0010] Furthermore, the throttling device in the air intake and exhaust channels alters the flow area of the channels when air enters and exits from the first chamber to the second chamber. For example, during the initial filling of the first chamber during the commissioning of the water hammer elimination tank, or when the external water pressure decreases and then increases, the liquid level in the first chamber rises. At this time, the movable valve is normally closed, and the gas in the first chamber can only flow into the second chamber through the throttling orifice with a smaller flow area. This slows down the gas discharge rate from the first chamber, preventing the liquid level in the first chamber from rising too quickly and preventing water hammer from occurring when the shut-off valve closes the air intake and exhaust channels. This provides a good water hammer impact protection for the water hammer elimination tank itself and a better buffering effect against pressurized water hammer. In addition, because the liquid level rise rate in the first chamber is controlled to be relatively slow, the shut-off valve can respond promptly when the first chamber is filled with water to close the air intake and exhaust channels, reducing the risk of liquid from the first chamber entering the second chamber.
[0011] Finally, since the gas in the first chamber can only be slowly discharged into the second chamber, the rate of liquid level rise in the first chamber can be reduced. This allows for a timely response when the first chamber is filled with water, shutting off the valve core to close the inlet and outlet channels and reducing the risk of liquid in the first chamber entering the second chamber.
[0012] As an optional technical solution, the throttling device also includes an elastic telescopic mechanism, which includes an elastic element and a guide rod. The guide rod is movably disposed in the intake and exhaust channels along the axial direction of the intake and exhaust channels. The elastic element is disposed around the outer periphery of the guide rod. The first end of the elastic element is fixed, and the second end abuts against one end of the guide rod. The other end of the guide rod is fixedly connected to the movable valve disc.
[0013] According to this optional technical solution, the movable valve disc is located within the inlet and outlet channels and is normally closed due to the elastic support of the elastic element. Therefore, when the pressure in the first chamber increases, the first chamber can only exhaust gas into the second chamber through the throttling orifice. Conversely, when the pressure in the first chamber decreases and the shut-off valve core opens the exhaust channel as the liquid level drops, the downward pressure overcomes the elastic support force of the elastic element, causing the movable valve disc to open and allowing gas to quickly enter the first chamber in response to a rapid pressure drop in the pipeline. Therefore, by connecting the movable valve disc to the elastic telescopic mechanism, no additional sensors, controllers, or other communication equipment are required, resulting in lower costs and more sensitive control over pressure changes in external pipelines.
[0014] As an optional technical solution, the flow area of the throttle orifice is 3%-25% of the flow area when the intake and exhaust channels are fully open.
[0015] According to this optional technical solution, by setting the flow area of the throttling orifice, the speed at which the first chamber exhausts gas into the second chamber can be controlled within a more preferred range, which avoids the water hammer caused by the liquid level rising too fast and ensures a more suitable efficiency in absorbing the pressure rise wave.
[0016] As an optional technical solution, the shut-off valve core includes a float and a shut-off valve disc, which are placed sequentially from top to bottom in the intake and exhaust channels along the direction of gravity. A switch valve seat is also fixed in the intake and exhaust channels, with a valve seat inlet in the middle. When the shut-off valve core closes the intake and exhaust channels, the valve seat inlet and the shut-off valve disc form a sealing pair.
[0017] According to this optional technical solution, the shut-off valve core can automatically respond and seal the air intake and exhaust channels as the liquid level rises, without the need for additional communication control, resulting in fast response and low failure risk.
[0018] As an optional technical solution, the shut-off valve disc is provided with a micro-venting channel, and the float is located on the side of the micro-venting channel near the first chamber.
[0019] According to this optional technical solution, when a small amount of air accumulates in the first chamber, the liquid level drops slightly, the float falls, and the shut-off valve disc is still pressed against the valve seat inlet by the pressure in the first chamber. Therefore, by providing a micro-venting channel in the shut-off valve disc, micro-venting can be maintained under these circumstances. Furthermore, by setting the float and the micro-venting channel in a corresponding manner, liquid can be further prevented from flowing into the second chamber through the micro-venting channel.
[0020] As an optional technical solution, the water hammer elimination tank also includes an overpressure relief structure, which is connected to the first chamber and the second chamber respectively.
[0021] According to the optional technical solution, the overpressure relief result is connected to the first chamber and the second chamber respectively, which can improve the overall safety of the water hammer elimination tank.
[0022] As an optional technical solution, the water hammer elimination tank also includes a pressure regulating unit, which is connected to a pressure regulating port and is used to charge / release air into the second chamber to regulate the pressure in the second chamber.
[0023] According to the optional technical solution, the pressure regulating unit can pressurize or depressurize the second chamber to keep the air pressure in the water hammer elimination tank stable at the pressure required for the working condition.
[0024] As an optional technical solution, the water hammer elimination tank also includes a liquid level detection device, which is connected to the first chamber to monitor the liquid level in the first chamber.
[0025] According to the optional technical solution, the liquid level detection device can monitor the liquid level in the first chamber, thereby knowing the gas-liquid ratio in the first chamber and monitoring the operation of the water hammer elimination tank.
[0026] As an optional technical solution, the water hammer elimination tank includes a tank body, and the tank body is divided into a first chamber and a second chamber by a partition.
[0027] According to the optional technical solution, two independent chambers can be formed by using only one tank body, making the structure of the water hammer elimination tank more compact.
[0028] As an optional technical solution, the water hammer elimination tank includes a first tank and a second tank that are set up independently. The first tank has a first chamber inside, and the second tank has a second chamber inside. The first tank and the second tank are connected by an air intake and exhaust pipe, and the air intake and exhaust unit is set at the air intake and exhaust pipe.
[0029] According to the optional technical solution, by setting up two independent pressure tanks, it is more suitable for scenarios that require the use of a larger volume water hammer elimination tank, and there is no need to weld partitions. The sealing and structural strength between the two chambers are also more reliable. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the structure of a water hammer elimination tank provided in an embodiment of the present invention;
[0031] Figure 2 and Figure 3 The different scenarios where the first chamber and the second chamber are located in two separate tanks are shown respectively;
[0032] Figure 4 This is a schematic diagram of the intake and exhaust passage when the movable valve disc remains normally closed in an embodiment of this utility model;
[0033] Figure 5 This is a schematic diagram of the structure when the movable valve disc fully opens the intake and exhaust channels in an embodiment of this utility model;
[0034] Explanation of reference numerals in the attached figures:
[0035] 1. First chamber; 11. Inlet and outlet;
[0036] 2. Second chamber; 21. Pressure regulating port;
[0037] 3. Intake and exhaust passages; 31. Switch valve seat;
[0038] 4. Shut-off valve core; 41. Float; 42. Shut-off valve disc; 43. Micro-venting channel;
[0039] 5. Throttling device; 51. Movable valve disc; 511. Throttling orifice; 52. Elastic telescopic mechanism; 521. Elastic element; 522. Guide rod.
[0040] 6. Overpressure relief structure;
[0041] 7. Baffle; 8. First tank; 9. Second tank; 10. Liquid level detection device. Detailed Implementation
[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0045] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0046] Figure 1 This is a schematic diagram of a water hammer elimination tank according to an embodiment of the present invention. The water hammer elimination tank includes a first chamber 1, a second chamber 2, an inlet and outlet passage 3, a shut-off valve core 3, and a throttling device 5. The first chamber 1 has an inlet and outlet port 11, and the second chamber 2 has a pressure regulating port 21. The second chamber 2 is used to contain positive pressure gas, and the first chamber 1 and the second chamber 2 are connected via the inlet and outlet passage 3. The shut-off valve core 3 and the throttling device 5 are both located within the inlet and outlet passage 3. By controlling the flow area of the inlet and outlet passage 3, or by controlling the opening and closing of the inlet and outlet passage 3, the gas flow between the first chamber 1 and the second chamber 2 can be adjusted.
[0047] The first chamber 1 has an inlet / outlet 11 connected to an external pipeline for replenishing liquid to the external pipeline or accommodating overpressurized liquid in the external pipeline. The inlet / outlet 11 can be located anywhere within the first chamber 1; to prevent splashing when water enters the chamber, it can be located at the bottom of the first chamber 1. The second chamber 2 has a pressure regulating port 21. The second chamber 2 can contain positive pressure gas. Positive pressure gas can be introduced into the second chamber 2 through the pressure regulating port 21, and gas can also be released through the pressure regulating port 21 to maintain stable gas pressure within the second chamber 2. Preferably, a pressure regulating unit can be connected to the outside of the second chamber 2. This pressure regulating unit can be a pressurizing mechanism, such as an air compressor, to pressurize the second chamber 2 when the gas pressure inside the second chamber 2 is insufficient.
[0048] It is important to note that Figure 1 The example illustrates a case where a single tank is divided by a partition 7 to form a first chamber 1 and a second chamber 2. This method allows for the creation of two independent chambers using only one tank. Furthermore, by creating openings in the partition 7, the air intake / exhaust channel 3, the shut-off valve core 3, and the throttling device 5 can be positioned at these openings, resulting in a more compact structure for the water hammer elimination tank. However, the invention is not limited to this. The first chamber 1 and the second chamber 2 can also be housed within independent tanks, and the position and connection method between the two tanks are not limited. For example, the two tanks can be arranged horizontally side-by-side, inclined, or vertically, all of which fall within the scope of protection of this invention.
[0049] Figure 2 and Figure 3 The illustrations show different scenarios where the first chamber 1 and the second chamber 2 are located in two separate tanks (first tank 8 and second tank 9). This arrangement is more suitable for scenarios requiring a larger volume of water hammer elimination tank, eliminates the need for welded partition 7, and improves the sealing and structural strength between the two chambers. An example is provided here where the first chamber 1 is located in tank 8 and the second chamber 2 is located in tank 9. Depending on the actual installation environment requirements, such as… Figure 2 As shown, the first tank 8 and the second tank 9 can be arranged horizontally side by side, and the tops of the first tank 8 and the second tank 9 can be connected by a pressure pipe. The inlet and outlet passage 3, the shut-off valve core 3 and the throttling device 5 can be set at the pressure pipe.
[0050] Or, such as Figure 3As shown, the first tank 8 and the second tank 9 can also be stacked along the direction of gravity. Specifically, the second tank 9 can be stacked on top of the first tank 8, and the top of the first tank 8 can be connected to any part of the second tank 9 through a pressure-bearing pipe. The figure shows an example of connecting the pressure-bearing pipe to the middle of the side of the second tank 9. In this way, the intake and exhaust channels 3, the shut-off valve core 3, and the throttling device 5 can be set on one side of the second tank 9, thereby making the upper and lower structures of the first tank 8 and the second tank 9 more compact and reducing the overall height of the device. In some other embodiments, the top of the first tank 8 and the bottom of the second tank 9 can also be connected, and the intake and exhaust channels 3, the shut-off valve core 3, and the throttling device 5 can be set between the upper and lower stacked first tank 8 and second tank 9, which can reduce the length of the pressure-bearing pipe and improve the overall pressure-bearing reliability of the device.
[0051] Furthermore, the intake and exhaust unit also includes a shut-off valve core 3 disposed at the exhaust channel, which closes the exhaust channel when the first chamber 1 is filled with liquid. The specific structure of the shut-off valve core 3 is not limited here; any valve core capable of closing the exhaust channel when the first chamber 1 is filled with liquid is applicable to this invention. For example, in some embodiments, the shut-off valve core 3 can be a float. The gravity parameter of the float prevents the gas from causing it to float, while the rising liquid level causes the float to float and close the exhaust channel, thus enabling the exhaust channel to be closed when the first chamber 1 is filled with liquid. Alternatively, in other embodiments, the shut-off valve core 3 can include an electronic control valve and a liquid level sensor. When the liquid level sensor detects that the liquid level in the first chamber 1 has reached the top, the electronic control valve closes the exhaust channel. All of the above fall within the protection scope of this invention.
[0052] By installing a shut-off valve core 3 in the air intake and exhaust channel 3, when the first chamber 1 is not filled with water, the first chamber 1 and the second chamber 2 are connected. When the first chamber 1 is filled with water, the shut-off valve core 3 closes the air intake and exhaust channel 3 between the first chamber 1 and the second chamber 2, and then fills the second chamber 2 with pressurized gas. At this time, the gas in the second chamber 2 will not come into contact with the water in the first chamber 1 during the normal operation of the water pipeline, which can reduce the dissolution and consumption of gas, thereby avoiding the need to frequently replenish the gas pressure in the second chamber 2 of the water hammer elimination tank, making the operation and maintenance cost of the water hammer elimination tank lower.
[0053] In this embodiment, a throttling device 5 is also provided in the intake and exhaust passage 3. The throttling device 5 includes a movable valve disc 51 disposed in the intake and exhaust passage 3. The movable valve disc 51 can move axially along the intake and exhaust passage 3, and a throttling orifice 511 is provided on the movable valve disc 51. When the pressure in the first chamber 1 rises, the movable valve disc 51 remains in a normally closed state to allow the medium in the intake and exhaust passage 3 to flow through the throttling orifice 511. When the pressure in the first chamber 1 drops and the shut-off valve core 3 opens the intake and exhaust passage 3, the movable valve disc 51 moves open to fully open the intake and exhaust passage 3.
[0054] In some specific embodiments, the throttling device 5 includes an elastic telescopic mechanism 52 and a movable valve disc 51. The elastic telescopic mechanism 52 includes an elastic element 521 and a guide rod 522. The guide rod 522 is movably disposed in the intake and exhaust passage 3 along the axial direction of the intake and exhaust passage 3. The elastic element 521 is disposed around the outer periphery of the guide rod 522. The first end of the elastic element 521 is fixed, and the second end abuts against one end of the guide rod 522. The other end of the guide rod 522 is fixedly connected to the movable valve disc 51. The movable valve disc 51 is located within the inlet / outlet channel 3 and is normally closed due to the elastic support of the elastic element 521. When the liquid level in the first chamber 1 rises, the movable valve disc 51 remains closed, and the first chamber 1 can only exhaust gas into the second chamber 2 through the throttle orifice 511. However, when the pressure in the first chamber 1 drops and the valve core 3 closes, opening the inlet / outlet channel 3, the downward pressure overcomes the elastic support of the elastic element 521, causing the movable valve disc 51 to open, allowing gas to quickly enter the first chamber 1 in response to a rapid pressure drop in the pipeline. Therefore, by connecting the movable valve disc 51 to the elastic telescopic mechanism 52, no additional sensors, controllers, or other communication equipment are required, resulting in lower costs and more sensitive control over pressure changes in external pipelines. The flow area of the throttle orifice 511 is 3%-25% of the flow area when the inlet and outlet channels 3 are fully open. By setting the flow area of the throttle orifice 511, the speed of exhaust from the first chamber 1 to the second chamber 2 can be controlled within a more preferred range, which avoids the water hammer caused by the liquid level rising too fast and ensures a more suitable efficiency in absorbing the pressure rise wave.
[0055] The working principle of this water hammer elimination tank in a water pipeline is as follows: First, water is filled into the first chamber 1. When the first chamber 1 is full of water, the shut-off valve core 3 rises with the liquid level to close the air inlet and outlet passage 3 between the first chamber 1 and the second chamber 2. Then, pressurized gas is filled into the second chamber 2 to make the pressure in the first chamber 1 and the second chamber 2 equal. The shut-off valve core 3 and the movable valve disc 51 will not open. At this time, the gas in the second chamber 2 will not come into contact with the water in the first chamber 1 during normal operation of the water pipeline, which can reduce the dissolution and consumption of gas, thereby avoiding the need to frequently replenish the gas pressure in the second chamber 2 of the water hammer elimination tank, making the operation and maintenance cost of the water hammer elimination tank lower. During pipeline operation, when the water pressure drops due to reasons such as pump shutdown, the water in the first chamber 1 will be replenished into the pipeline. At this time, the liquid level in the first chamber 1 drops, the shut-off valve core 3 opens the air inlet and outlet passage 3, and the pressurized gas can squeeze out the water in the first chamber 1. After the water enters the pipeline, it can eliminate the pressure drop caused at a distance, thereby preventing water hammer. When the pressure drop wave is reflected back, the water in the pipe re-enters the first chamber 1, the liquid level in the first chamber 1 rises, and the gas is compressed. The pressure of the gas counteracts the pressure of the water, which has a good buffering effect, thus preventing water hammer.
[0056] It is worth mentioning that, in this embodiment, the water hammer elimination tank, due to the throttling device 5 installed in the air intake and exhaust channel 3, can change the flow area of the air intake and exhaust channel 3 when air is being introduced from the first chamber 1 to the second chamber 2. When the water hammer elimination tank is initially filled with water during operation and debugging, or when the external water circuit experiences a pressure drop followed by the release of pressurized water into the first chamber 1, the pressure in the first chamber 1 increases, such as... Figure 4 As shown, at this time, the active valve disc 51 is normally closed, and the gas in the first chamber 1 can only flow into the second chamber 2 through the throttling orifice 511 with a smaller flow area. This slows down the gas discharge rate from the first chamber 1, preventing the liquid level in the first chamber 1 from rising too quickly and preventing water hammer from occurring when the shut-off valve core 3 closes the inlet and outlet passage 3. This effectively mitigates water hammer impact on the water hammer elimination tank itself, resulting in higher safety. When water from the first chamber 1 is replenished into the pipeline, such as... Figure 5 As shown, at this time, the movable valve disc 51 moves downward to fully open the air intake and exhaust passage 3, allowing pressurized gas to quickly enter the first chamber 1, and allowing water in the first chamber 1 to quickly replenish the pipeline, thereby enabling a rapid response to pipeline pressure reduction.
[0057] The embodiments of this utility model provide a more detailed structure of the shut-off valve core 3. The shut-off valve core 3 can be a float, a hemispherical valve disc, or a disc-shaped valve disc, and is not limited thereto. The shut-off valve disc 42 is disposed at the inlet and outlet passage 3. When the first chamber 1 is filled with water, the shut-off valve disc 42 closes the inlet and outlet passage 3. Preferably, the shut-off valve core 3 is a float. The shut-off valve core 3 can automatically respond and seal the inlet and outlet passage 3 as the liquid level rises, without the need for additional communication control, resulting in fast response speed and low failure risk.
[0058] refer to Figure 4 and Figure 5 The shut-off valve core 3 may also include a float 41 and a shut-off valve disc 42, which are arranged sequentially from top to bottom in the air intake and exhaust channel 3 along the direction of gravity. A switch valve seat 3 is also fixed in the air intake and exhaust channel 3, with a valve seat inlet in the middle. When the shut-off valve core 3 closes the air intake and exhaust channel 3, the valve seat inlet and the shut-off valve disc 42 form a sealing pair. Furthermore, the shut-off valve disc 42 is provided with a micro-venting channel 43, and the float 41 is positioned on the side of the micro-venting channel 43 near the first chamber 1. When a small amount of air accumulates in the first chamber 1, the liquid level drops slightly, causing the float 41 to fall. The shut-off valve disc 42 remains pressed against the valve seat inlet by the pressure in the first chamber 1. Therefore, by providing a micro-venting channel 43 in the shut-off valve disc 42, micro-venting can be maintained under these conditions. Furthermore, by correspondingly positioning the float 41 with the micro-venting channel 43, liquid can be further prevented from flowing into the second chamber 2 through the micro-venting channel 43.
[0059] Furthermore, since the water hammer elimination tank is a pressure vessel containing a pressure medium, in this embodiment, to improve safety, the water hammer elimination tank is also equipped with an overpressure relief structure 6. The overpressure relief structure 6 can be a safety valve or a water hammer relief valve. Considering that the water hammer elimination tank in this embodiment has two pressurized chambers (first chamber 1 and second chamber 2), two overpressure relief structures 6 can be set, and the two overpressure relief structures 6 can be respectively connected to the first chamber 1 and the second chamber 2, thereby improving the overall safety of the water hammer elimination tank.
[0060] In some embodiments, the water hammer elimination tank further includes a liquid level detection device 10, which is connected to the first chamber 1 to monitor the liquid level in the first chamber 1. The liquid level detection device 10 can be a magnetic level gauge, a photoelectric level gauge, a float level gauge, etc., and is not limited thereto. Figure 1 The magnetic level gauge can be connected to the upper and lower ends of the first chamber 1. The level detection device 10 can monitor the liquid level in the first chamber 1, thereby determining the gas-liquid ratio in the first chamber 1 and monitoring the operation of the water hammer elimination tank.
[0061] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A water hammer elimination tank, characterized in that, include: The first chamber (1) is provided with inlet and outlet water outlets (11); The second chamber (2) is provided with a pressure regulating port (21), and the second chamber (2) is used to contain positive pressure gas; The intake and exhaust passage (3) connects the first chamber (1) and the second chamber (2); The shut-off valve core (4) is located in the air intake and exhaust passage (3). When the first chamber (1) is filled with liquid, the air intake and exhaust passage (3) is closed. The throttling device (5) includes a movable valve disc (51) disposed in the intake and exhaust passage (3). The movable valve disc (51) can move axially along the intake and exhaust passage (3). The movable valve disc (51) is provided with a throttling orifice (511). When the pressure in the first chamber (1) rises, the movable valve disc (51) remains in a normally closed state to allow the medium in the intake and exhaust passage (3) to flow through the throttling orifice (511). When the pressure in the first chamber (1) drops and the shut-off valve core (4) opens the intake and exhaust passage (3), the movable valve disc (51) moves to open so that the intake and exhaust passage (3) is fully opened.
2. The water hammer elimination tank according to claim 1, characterized in that, The throttling device (5) further includes: The elastic telescopic mechanism (52) includes an elastic element (521) and a guide rod (522). The guide rod (522) is movably disposed in the intake and exhaust channel (3) along the axial direction of the intake and exhaust channel (3). The elastic element (521) is disposed around the outer periphery of the guide rod (522). The first end of the elastic element (521) is fixed, and the second end abuts against one end of the guide rod (522). The other end of the guide rod (522) is fixedly connected to the movable valve disc (51).
3. The water hammer elimination tank according to claim 1, characterized in that, The flow area of the throttle orifice (511) is 3%-25% of the flow area of the intake and exhaust channels (3) when they are fully open.
4. The water hammer elimination tank according to any one of claims 1-3, characterized in that, The shut-off valve core (4) includes a float (41) and a shut-off valve disc (42), and the shut-off valve disc (42) and the float (41) are placed in the intake and exhaust channels (3) from top to bottom along the direction of gravity; A switch valve seat (31) is also fixed in the intake and exhaust passage (3). A valve seat inlet is opened in the middle of the switch valve seat (31). When the shut-off valve core (4) closes the intake and exhaust passage (3), the valve seat inlet and the shut-off valve disc (42) form a sealing pair.
5. The water hammer elimination tank according to claim 4, characterized in that, The shut-off valve disc (42) is provided with a micro-venting channel (43), and the float (41) is located on the side of the micro-venting channel (43) near the first chamber (1).
6. The water hammer elimination tank according to any one of claims 1-3, characterized in that, It also includes an overpressure relief structure (6), which is connected to the first chamber (1) and the second chamber (2) respectively.
7. The water hammer elimination tank according to any one of claims 1-3, characterized in that, Also includes: The pressure regulating unit is connected to the pressure regulating port (21) and is used to fill / release air into the second chamber (2) to regulate the pressure in the second chamber (2).
8. The water hammer elimination tank according to any one of claims 1-3, characterized in that, Also includes: A liquid level detection device (10) is connected to the first chamber (1) to monitor the liquid level in the first chamber (1).
9. The water hammer elimination tank according to any one of claims 1-3, characterized in that, It includes a tank body, which is divided by a partition (7) to form a first chamber (1) and a second chamber (2).
10. The water hammer elimination tank according to any one of claims 1-3, characterized in that, It includes a first tank (8) and a second tank (9) that are set independently. The first tank (8) has a first chamber (1) inside, and the second tank (9) has a second chamber (2) inside. The first tank (8) and the second tank (9) are connected through an intake and exhaust pipe. The shut-off valve core (4) is set at the intake and exhaust pipe.