Water hammer eliminating tank

Abstract

The utility model discloses a water hammer eliminating tank, which relates to the technical field of water delivery pipelines, and comprises a first chamber, a second chamber and a gas injection micro-discharge valve, the first chamber and the second chamber are communicated through the gas injection micro-discharge valve, the gas injection micro-discharge valve comprises a valve body shell and a gas suction micro-discharge valve core, a first opening is formed at the bottom of the valve body shell, and a second opening is formed at the bottom of the valve body shell. A first opening is formed in the top of the valve body shell and communicates with the first cavity, a second opening is formed in the top of the valve body shell and communicates with the second cavity, and the air suction micro-discharging valve element is located in the valve body shell. According to the water hammer eliminating tank, through the rapid air suction and slow air exhaust effects of the air injection micro-exhaust valve, when a boosting water hammer occurs in an external water path, air in the first cavity is slowly exhausted, and due to the fact that the air in the first cavity cannot be rapidly exhausted into the second cavity, the situation that the boosting water hammer is generated due to the fact that the liquid level rapidly rises and the first cavity is filled with the liquid level is avoided; therefore, a better protection effect is achieved on the boosting water hammer.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pipeline technical field especially a water hammer elimination tank. BACKGROUND

[0002] In the water pipeline system, when unexpected situations such as the sudden stop of the delivery pump or the sudden closing of the valve in the pipeline occur, the transient state of the sharp change of the flow and pressure of the fluid in the pipeline will appear, which is called water hammer. When water hammer occurs, the sharp change of the flow of the fluid in the pipeline will cause the propagation of the pressure wave, resulting in the rapid rise / fall of the pressure in the pipeline, and even the pipeline may collapse or be damaged due to the pressure wave.

[0003] In order to reduce or avoid the loss caused by water hammer hazards, a water hammer protection device such as a water hammer elimination tank or a bidirectional pressure regulating tower is generally used in the pump water pipeline system, which can relieve the excessive pressure in the pipeline by supplementing the pressure in the pipeline and absorbing water in the pipeline, thereby reducing the water hammer phenomenon caused by the sharp change of the flow of the fluid in the pipeline.

[0004] Among them, the existing water hammer elimination tank is usually a pressure tank with an elastic inner container, which can expand and absorb water when the external pipeline pressure is too high by pre-charging the pressure compression gas between the inner container and the tank body to extrude the inner container, and when the external pipeline pressure is low, the compression gas extrudes the inner container to supplement the water and pressurize the external pipeline, thereby offsetting the pressure fluctuation of the water in the external pipeline. However, on the one hand, the inner container needs to be made of elastic pressure-bearing material, which is expensive, resulting in high cost of the water hammer elimination tank, and on the other hand, the inner container has the risk of rupture when absorbing the excessive pressure in the pipeline, resulting in failure of the water hammer elimination tank to protect the pipeline.

[0005] To this end, patent CN112066260B provides a pressure tank, which is divided into a first liquid cavity and a first gas cavity by a partition, the partition is provided with a through hole, and a first plugging member is arranged to plug or unplug the through hole, i.e. the pressure tank provides a water hammer elimination tank without an inner container. However, the first plugging member in this structure plugs the through hole as the liquid level rises, and when the tank body and the pipeline are filled with water, the liquid level in the first liquid cavity of the pressure tank rises quickly, which may cause water hammer damage to the pressure tank, and the first gas cavity may be filled with water due to the delayed response of the plugging member. UTILITY MODEL CONTENTS

[0006] The utility model provides a kind of water hammer elimination tank, its purpose is to overcome the above-mentioned problems existing in prior art.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides a water hammer elimination tank, including first chamber, second chamber and gas injection micro -discharge valve, wherein, first chamber is equipped with inlet and outlet water, second chamber is equipped with pressure regulating port, first chamber and second chamber are communicated through gas injection micro -discharge valve, and gas injection micro -discharge valve includes valve body shell and suction micro -discharge valve core, the bottom of valve body shell forms first opening, and first opening communicates with first chamber, and the top of valve body shell forms second opening, and second opening communicates with second chamber, and suction micro -discharge valve core is located in valve body shell.

[0009] According to the technical scheme of the utility model, first, the second chamber is filled with gas with pressure, and a gas injection micro -discharge valve is arranged between the first chamber and the second chamber, the first chamber and the second chamber are communicated when the first chamber is not filled with water, and the first chamber and the second chamber are cut off when the first chamber is filled with water, so that the pressure water hammer generated by the external waterway can be absorbed and the pressure water hammer generated by the external waterway can be compensated, and good pipeline water hammer protection effect is achieved.

[0010] Then, the first chamber and the second chamber are communicated through the gas injection micro -discharge valve with fast inlet and slow discharge, when the pressure water hammer occurs in the external waterway, the suction micro -discharge valve core can quickly inhale and compensate, when the pressure water hammer occurs in the external waterway, the suction micro -discharge valve core can slowly discharge the gas in the first chamber, and since the gas in the first chamber cannot be quickly discharged into the second chamber, the pressure water hammer caused by the rapid rise of the liquid level and the filling of the first chamber is avoided. Especially for the case of rapid rise of the liquid level in the first chamber, for example, when the waterway and the water hammer elimination tank are filled with water, only the slow discharge of the gas in the first chamber through the micro -discharge unit can reduce the rising speed of the liquid level in the first chamber, so that the micro -discharge valve can be closed in time when the first chamber is filled with water, and the risk of the liquid in the first chamber entering the second chamber is reduced.

[0011] Finally, the suction micro -discharge valve core is integrated in a valve body shell, the valve body shell can be used as a hollow pressure pipeline, and can be conveniently communicated with the first chamber and the second chamber, for example, the valve body shell and the openings of the first chamber and the second chamber can be directly sealed and connected through two flanges, the structure is simple, and especially for the pressure container, the leakage point is greatly reduced, and the safety is reliable.

[0012] As an optional technical scheme, the suction micro -discharge valve core includes an air inlet channel, an air inlet unit and an air outlet channel. The air inlet unit is arranged in the air inlet channel, and the air inlet unit includes a sealing valve flap. When the difference between the pressure of the second chamber and the pressure of the first chamber is not greater than a preset pressure difference, the sealing valve flap cuts off the air inlet channel. When the difference between the pressure of the second chamber and the pressure of the first chamber is greater than the preset pressure difference, the sealing valve flap communicates the air inlet channel. The air outlet channel is formed in a manner penetrating the sealing valve flap.

[0013] According to the optional technical solution, the exhaust passage is directly arranged to pass through the sealing valve disc of the through air inlet unit, so that the one-way air inlet unit and the shutoff valve core can be integrated in the same housing, and the structure of the air suction micro-exhaust valve core is more compact.

[0014] As an optional technical solution, the air inlet unit further comprises a valve seat and an elastic normally closed mechanism. The valve seat is fixed in the air inlet passage, a valve seat inlet is arranged in the middle of the valve seat, and the sealing valve disc is arranged on the side of the valve seat inlet close to the first chamber and used for pressing the valve seat inlet to cut off the air inlet passage. The elastic normally closed mechanism comprises an elastic member and a pull rod. The elastic member is fixed on one side of the valve seat, and the pull rod is fixed at one end of the elastic member and fixed at the other end of the pull rod to the sealing valve disc through the valve seat inlet, so that the sealing valve disc is pressed to the valve seat inlet.

[0015] According to the optional technical solution, when the pressure difference between the second chamber and the first chamber is less than or equal to the elastic force of the elastic member on the sealing valve disc, the elastic member remains contracted, the sealing valve disc is pressed to the valve seat inlet, and the air inlet passage remains closed; when the pressure in the first chamber is reduced to a value greater than the elastic force of the elastic member on the sealing valve disc, the elastic member is stretched, the sealing valve disc is separated from the valve seat, and the air inlet passage is opened.

[0016] As an optional technical solution, the air suction micro-exhaust valve core further comprises a shutoff valve core. The shutoff valve core is arranged at the exhaust passage, and the exhaust passage is closed when the first chamber is filled with liquid.

[0017] According to the optional technical solution, through the rapid response of the shutoff valve core, the liquid can be prevented from entering the second chamber, and the normal operation of the water hammer elimination tank is ensured.

[0018] As an optional technical solution, the shutoff valve core comprises a valve disc and a float. The exhaust passage has an exhaust port, the valve disc is arranged on the side of the exhaust port facing the direction of gravity, the float is linked with the valve disc, and the gravity of the float is applied to the valve disc. When the water level rises to the position of the float, the float rises with the water level, and the valve disc is pressed to the exhaust port.

[0019] According to the optional technical solution, the shutoff valve core can automatically respond to the rising of the liquid surface without additional communication control, has a fast response speed, and has a low failure risk.

[0020] As an optional technical solution, the cross-sectional area of the exhaust passage is smaller than the cross-sectional area of the air inlet passage.

[0021] According to the optional technical solution, when the air inlet passage is communicated, a large amount of air can be introduced from the second chamber to the first chamber to quickly compensate for the pressure drop of the external pipeline; when the exhaust passage is communicated, a small amount of air can be slowly exhausted from the first chamber to the second chamber, so that the rising speed of the liquid level in the first chamber can be inhibited, and the buffering effect of the water hammer elimination tank on the positive pressure water hammer can be improved.

[0022] As an optional technical solution, the inner diameter of the exhaust channel is 1.6-5mm.

[0023] According to the optional technical solution, if the inner diameter of the exhaust channel is too large, the technical effect of fast filling and slow exhausting cannot be achieved, and if the inner diameter of the exhaust channel is too small, the air in the first chamber cannot be exhausted in time, which is easy to cause overpressure of the first chamber. By setting the exhaust channel in the range of 1.6-5mm, the pressure-bearing reliability of the first chamber can be ensured, and the effect of fast filling and slow exhausting can be achieved.

[0024] As an optional technical solution, the water hammer elimination tank further comprises a pressure regulating unit in communication with the pressure regulating port, for charging / discharging air into the second chamber to regulate the pressure in the second chamber. By means of the pressure regulating unit, the gas pressure in the second chamber can be kept stable when the gas pressure in the second chamber fluctuates.

[0025] As an optional technical solution, the water hammer elimination tank comprises a tank body, and the tank body is divided into the first chamber and the second chamber by a partition plate. Only one tank body is needed to form two independent chambers, so that the structure of the water hammer elimination tank is more compact.

[0026] As an optional technical solution, the water hammer elimination tank comprises a first tank body and a second tank body arranged independently, the first tank body is internally provided with the first chamber, and the second tank body is internally provided with the second chamber. The first tank body and the second tank body are in communication through the air charging and discharging pipeline, and the air charging and discharging valve is arranged at the air charging and discharging pipeline. By arranging two independent pressure-bearing tanks, the water hammer elimination tank with larger volume can be used in the scene, and the sealing between the two chambers is more reliable without welding the partition plate. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structure schematic view of a water hammer elimination tank provided by an embodiment of the utility model;

[0028] Figure 2 and Figure 3 is different situation that the first chamber and the second chamber are arranged in two independent tank bodies provided by an embodiment of the utility model;

[0029] Figure 4 is a structure schematic view of an air charging and discharging valve provided by an embodiment of the utility model.

[0030] BRIEF DESCRIPTION OF DRAWINGS

[0031] 1- first chamber, 11- water inlet and outlet;

[0032] 2- second chamber, 21- pressure regulating port;

[0033] 3 - gas injection micro-pitot valve, 31 - inlet passage, 32 - outlet passage, 321 - outlet port, 33 - shut-off valve core, 331 - valve disc, 332 - float, 34 - inlet unit, 341 - valve seat, 342 - sealing valve disc, 343 - elastic member, 344 - pull rod; 35 - valve body housing;

[0034] 4 - partition; 5 - first tank body; 6 - second tank body; 7 - inlet and outlet pipeline; 8 - safety valve. DETAILED DESCRIPTION

[0035] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model and are not limited to the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.

[0036] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0037] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0038] In the description of the embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation of the utility model. In addition, the terms "first" and "second" are only used to distinguish in description and have no special meaning.

[0039] Figure 1It is a kind of water hammer elimination tank's structure schematic diagram provided in the embodiment of the utility model. The water hammer elimination tank includes two chambers (first chamber 1 and second chamber 2), and two chambers are independently arranged and are communicated via injection gas micro-discharge valve 3.

[0040] Wherein, the first chamber 1 is provided with inlet and outlet water port 11, the inlet and outlet water port 11 is communicated with external pipeline, is used to supplement liquid to external pipeline, or contains the liquid of overpressure in external pipeline, the inlet and outlet water port 11 can be arranged at any part of the first chamber 1, to prevent water from splashing when entering the chamber, the inlet and outlet water port 11 can be arranged at the bottom of the first chamber 1. The second chamber 2 is provided with pressure regulating port 21, and the second chamber 2 can contain positive pressure gas, and the second chamber 2 can be filled with positive pressure gas through the pressure regulating port 21, and the second chamber 2 can be discharged through the pressure regulating port 21 to maintain the stable air pressure in the second chamber 2. Optionally, a pressure regulating unit can be communicated outside the second chamber 2, and the pressure regulating unit can be a pressure increasing mechanism, such as an air compressor, to increase the pressure of the second chamber 2 when the gas pressure in the second chamber 2 is insufficient.

[0041] It should be noted that, Figure 1 The first chamber 1 and the second chamber 2 are formed by the partition plate 4 in the example in the embodiment, and two independent chambers are formed by the above method by separating only one tank body, and further, the injection gas micro-discharge valve 3 can be arranged at the opening of the partition plate 4, so that the structure of the water hammer elimination tank is more compact. However, the present application is not limited to this, and the first chamber 1 and the second chamber 2 can also be arranged in independent tank bodies, and the arrangement between the two tank bodies is not limited herein. For example, the two tank bodies can be arranged horizontally, inclinedly or vertically, which all belong to the protection scope of the utility model.

[0042] Figure 2 And Figure 3 The first chamber 1 and the second chamber 2 are arranged in two independent tank bodies (the first tank body 5 and the second tank body 6), which is more suitable for the scene where a larger volume of water hammer elimination tank is needed, and the partition plate 4 does not need to be welded, and the sealing between the two chambers is more reliable. Here, the tank body where the first chamber 1 is located is taken as the first tank body 5, and the tank body where the second chamber 2 is located is taken as the second tank body 6. According to the actual installation environment requirements, as shown in Figure 2 The first tank body 5 and the second tank body 6 can be arranged horizontally, and the top of the first tank body 5 and the second tank body 6 can be communicated by a pressure-bearing pipe, and the injection gas micro-discharge valve 3 can be arranged at the pressure-bearing pipe.

[0043] Or, as Figure 3As shown, the first tank 5 and the second tank 6 can also be stacked along the direction of gravity. Specifically, the second tank 6 can be stacked on top of the first tank 5, and the top of the first tank 5 can be connected to any part of the second tank 6 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 6. This allows the gas injection micro-discharge valve 3 to be placed on one side of the second tank 6, making the upper and lower structures of the first tank 5 and the second tank 6 more compact and reducing the overall height of the device. In other embodiments, the top of the first tank 5 and the bottom of the second tank 6 can be connected, and the gas injection micro-discharge valve 3 can be placed between the stacked first tank 5 and the second tank 6. This can reduce the length of the pressure-bearing pipe and improve the overall pressure-bearing reliability of the device.

[0044] Furthermore, since it is a pressure vessel containing pressurized gas, the water hammer elimination tank generally needs to be equipped with a safety valve 8. Considering that the water hammer elimination tank in this embodiment has two pressurized chambers (first chamber 1 and second chamber 2), two safety valves 8 can be installed and connected to the first chamber 1 and the second chamber 2 respectively, thereby improving the overall safety of the water hammer elimination tank.

[0045] like Figure 4 As shown, the gas injection micro-discharge valve 3 includes a valve body shell 35 and a gas intake micro-discharge valve core. The bottom of the valve body shell 35 forms a first opening, which communicates with the first chamber 1. The top of the valve body shell 35 forms a second opening, which communicates with the second chamber 2. That is, the valve body shell 35 of the gas injection micro-discharge valve 3 can be used as a hollow pressure-bearing pipe, which can be easily connected to the first chamber 1 and the second chamber 2. For example, the valve body shell 35 and the openings of the first chamber 1 and the second chamber 2 can be directly sealed and connected by two flanges. The structure is simple, and especially for pressure vessels, the leakage points are greatly reduced.

[0046] An intake micro-discharge valve core is provided inside the valve body housing 35. As those skilled in the art will understand, an air valve is a special valve used to prevent negative pressure from being generated inside the pipe by a transient pressure reduction wave. It draws in gas when the pressure in one chamber is lower than the pressure in the other chamber, and discharges gas when the pressure in one chamber rises above the pressure in the other chamber. Furthermore, during the discharge process, the air valve automatically closes when one chamber is full of liquid, preventing liquid discharge. The intake micro-discharge valve 3 refers to an air valve capable of large-volume intake and small-volume discharge. In this embodiment, the specific structure and type of the intake micro-discharge valve core of the intake micro-discharge valve 3 can be selected according to actual conditions, as long as it allows large-volume intake from the second chamber 2 to the first chamber 1 when the external pipeline is under negative pressure, small-volume discharge from the first chamber 1 to the second chamber 2 when the external pipeline is under positive pressure, and isolates the first chamber 1 and the second chamber 2 when the first chamber 1 is full of liquid; there are no limitations on this.

[0047] Specifically, when the external water pressure drops (e.g., the water pump suddenly stops), the pressure in the first chamber 1 decreases, creating a pressure difference between the first chamber 1 and the second chamber 2. When this pressure difference reaches a predetermined value, the suction valve core of the air injection micro-discharge valve 3 causes a large amount of pressurized gas in the second chamber 2 to flow into the first chamber 1, and pushes the water in the first chamber 1 toward the inlet / outlet 11. As a result, the water in the first chamber 1 is replenished into the external water circuit, increasing the pressure in the external water circuit and reducing the pressure drop caused by the pump stoppage.

[0048] When the pressure in the first chamber 1 increases, for example, after a pressure-reducing water hammer occurs, some liquid will be transmitted back to the first chamber 1 in the form of a pressure-boosting wave. The liquid level in the first chamber 1 rises, and the gas pressure in the first chamber 1 increases, creating a pressure difference between the first chamber 1 and the second chamber 2. When this pressure difference reaches a predetermined value, the suction valve core of the gas injection micro-discharge valve 3 causes the gas in the first chamber 1 to be slowly discharged into the second chamber 2. Until the liquid level in the first chamber 1 rises to fill the first chamber 1, the suction valve core cuts off and separates the first chamber 1 and the second chamber 2. During this process, the pressurized gas in the second chamber 2 absorbs the high-pressure energy of the pressure-boosting wave, which can eliminate the pressure-boosting water hammer caused by the pressure-boosting wave.

[0049] The following is a detailed description of the structure of an intake micro-exhaust valve core, illustrated with reference to the accompanying drawings.

[0050] like Figure 4 As shown, the intake micro-exhaust valve core of the air injection micro-exhaust valve 3 is sealed to the valve body shell 35, and the intake micro-exhaust valve core has two channels (inlet channel 31 and exhaust channel 32). The inlet channel 31 is equipped with an intake unit 34 for connecting / closing the inlet channel 31; while the exhaust channel 32 is equipped with a shut-off valve core 33 for connecting / closing the exhaust channel 32. Specifically, the cross-sectional area of ​​the exhaust channel 32 is smaller than that of the inlet channel 31. In this way, when the inlet channel 31 is connected, a large amount of air can be introduced from the second chamber 2 into the first chamber 1, quickly replenishing the pressure drop of the external pipeline; when the exhaust channel 32 is connected, a small amount of air can be slowly exhausted from the first chamber 1 into the second chamber 2, thereby suppressing the rate of liquid level rise in the first chamber 1 and improving the buffering effect of the water hammer elimination tank on positive pressure water hammer.

[0051] Further, optionally, the inner diameter of the exhaust channel 32 is 1.6-5mm. If the inner diameter of the exhaust channel 32 is too large, it will not achieve the technical effect of slow exhaust; if the inner diameter of the exhaust channel 32 is too small, the air in the first chamber 1 cannot be exhausted in time, which may easily lead to overpressure in the first chamber 1. Setting the exhaust channel 32 in the range of 1.6-5mm can achieve the effect of slow exhaust while ensuring the pressure-bearing reliability of the first chamber 1.

[0052] [Intake Unit 34]

[0053] like Figure 2 As shown, the intake unit 34 is disposed in the intake channel 31. The intake unit 34 includes a sealing valve 342. When the pressure difference between the second chamber 2 and the first chamber 1 is not greater than a preset pressure difference, the sealing valve 342 cuts off the intake channel 31. When the pressure difference between the second chamber 2 and the first chamber 1 is greater than the preset pressure difference, the sealing valve 342 connects the intake channel 31 and the exhaust channel 32, forming a through-flow sealing valve 342.

[0054] On one hand, when the pressure difference between the second chamber 2 and the first chamber 1 is not greater than a preset pressure difference, if the pressure in the second chamber 2 remains unchanged (i.e., when the pressure in the first chamber 1 drops to a specified threshold), the intake unit 34 opens the intake channel 31, and the pressurized gas in the second chamber 2 quickly flows into the first chamber 1 through the large cross-sectional area intake channel 31 for pressurization. On the other hand, when the pressure difference between the second chamber 2 and the first chamber 1 is not greater than a preset pressure difference, if the pressure in the second chamber 2 remains unchanged (i.e., when the pressure in the first chamber 1 rises to a specified threshold), the intake unit 34 closes the intake channel 31, so that the gas in the first chamber 1 can only flow out of the first chamber 1 through the small cross-sectional area exhaust channel 32, thus suppressing the rate of liquid level rise in the first chamber 1.

[0055] On the other hand, the exhaust passage 32 is opened directly through the sealing valve disc 342 of the intake unit 34, thereby enabling the one-way intake unit 34 and the shut-off valve core 33 to be integrated into the same housing, making the structure of the intake micro-exhaust valve core more compact.

[0056] Optionally, the intake unit 34 may further include a valve seat 341 and a resilient normally closed mechanism. The valve seat 341 is fixed within the intake passage 31, with a valve seat inlet in the middle. A sealing valve disc 342 is located on the side of the valve seat inlet near the first chamber 1, used to press against the valve seat inlet to cut off the intake passage 31. The resilient normally closed mechanism includes an elastic element 343 and a pull rod 344. The elastic element 343 is fixed to one side of the valve seat 341, and one end of the pull rod 344 is fixed to the elastic element 343, while the other end passes through the valve seat inlet and is fixed to the sealing valve disc 342, so that the sealing valve disc 342 presses against the valve seat inlet.

[0057] Specifically, when the pressure in the first chamber 1 rises to a pressure difference between the second chamber 2 and the first chamber 1 is less than or equal to the elastic force of the elastic member 343 on the sealing valve 342, the elastic member 343 remains contracted, pressing the sealing valve 342 against the valve seat inlet, and the intake passage 31 remains closed; when the pressure in the first chamber 1 decreases to a pressure difference between the second chamber 2 and the first chamber 1 is greater than the elastic force of the elastic member 343 on the sealing valve 342, the elastic member 343 stretches, and the sealing valve 342 moves away from the valve seat 341, thereby opening the intake passage 31.

[0058] [Shut-off valve core 33]

[0059] The shut-off valve core 33 is arranged at the exhaust passage 32 and closes the exhaust passage 32 when the first chamber 1 is filled with liquid. The specific structure of the shut-off valve core 33 is not limited herein, and any valve core that can close the exhaust passage 32 when the first chamber 1 is filled with liquid is suitable for the utility model, for example, in some embodiments, the shut-off valve core 33 can be a floating ball. Gas cannot make the floating ball float, but the rising liquid surface can make the floating ball float to close the exhaust passage 32, thereby being able to close the exhaust passage 32 when the first chamber 1 is filled with liquid. Alternatively, in other embodiments, the shut-off valve core 33 can be an electronic control valve and a liquid level sensor. When it is detected that the liquid level of the first chamber 1 reaches the top, the electronic control valve closes the exhaust passage 32, which all belongs to the protection scope of the utility model.

[0060] Optionally, the shut-off valve core 33 comprises a valve flap 331 and a float 332, and a floating ball is taken as an example in the drawings, and other shapes of the float 332 are also suitable for the utility model. The exhaust passage 32 has an exhaust port 321, the valve flap 331 is arranged on the side of the exhaust port 321 facing the direction of gravity, the float 332 is linked with the valve flap 331 and applies its own gravity to the valve flap 331. When the water level rises to the position of the float 332, the float 332 rises with the water level and drives the valve flap 331 to press against the exhaust port 321. When the liquid level rises to the position of the float 332, the float 332 rises with the liquid level and drives the valve flap 331 to press against the exhaust port 321. The shut-off valve core 33 can automatically respond to the rising liquid level without additional communication control, has fast response speed and low failure risk.

[0061] In the embodiment, first, the second chamber 2 is filled with gas with pressure, and a gas injection micro exhaust valve 3 is arranged between the first chamber 1 and the second chamber 2. When the first chamber 1 is not filled with water, the first chamber 1 and the second chamber 2 are communicated, and when the first chamber 1 is filled with water, the first chamber 1 and the second chamber 2 are cut off, thereby being able to absorb the water hammer of the external waterway and supplement the water hammer of the external waterway, thereby playing a good pipeline water hammer protection role.

[0062] Then, by setting the fast forward slow exhaust gas injection micro exhaust valve 3 communication first chamber 1 and second chamber 2, when the external waterway pressure drop water hammer, suction micro exhaust valve core can quickly absorb the air pressure, when the external waterway pressure rise water hammer, suction micro exhaust valve core can slowly exhaust the gas in the first chamber 1, due to the gas in the first chamber 1 can not be quickly exhausted and in the first chamber 1 top high pressure air bag, thereby for the pressure rise water hammer has better buffering effect. Especially for the first chamber 1 in the liquid surface rises rapidly, for example, for the waterway and water hammer elimination tank when filling water, only by micro exhaust unit slowly exhaust the gas in the first chamber 1, can reduce the first chamber 1 in the liquid surface rising speed, so as to be able to fill the water in the first chamber 1 in time when the response, close the micro exhaust valve, reduce the risk of liquid in the first chamber 1 into the second chamber 2.

[0063] Finally, by integrating the suction micro exhaust valve core in a valve body shell 35, the valve body shell 35 can be used as a hollow pressure pipeline, can be very convenient communication in the first chamber 1 and second chamber 2, for example, can be directly connected by two flanges, the valve body shell 35 and the first chamber 1 and second chamber 2 opening seal, simple structure, especially for pressure vessels, the leakage point is greatly reduced, safe and reliable.

[0064] Obviously, the above embodiments of the present application are merely examples for the purpose of clear illustration, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, readjustment and replacement can be made without departing from the scope of the present application. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement within the spirit and principles of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A water hammer arrestor characterized by, The utility model relates to a water level regulating valve, comprising: a first chamber (1) provided with an inlet and outlet (11); a second chamber (2) provided with a pressure regulating port (21); an injection micro-discharge valve (3) connecting the first chamber (1) and the second chamber (2), the injection micro-discharge valve (3) comprising a valve body shell (35) and a suction micro-discharge valve core, the bottom of the valve body shell (35) being formed into a first opening, the first opening being connected with the first chamber (1), the top of the valve body shell (35) being formed into a second opening, the second opening being connected with the second chamber (2), and the suction micro-discharge valve core being located in the valve body shell (35).

2. The water hammer arrestor of claim 1, wherein, The suction micro-discharge valve core comprises: an air inlet channel (31); an air inlet unit (34) arranged in the air inlet channel (31), the air inlet unit (34) comprising a sealing valve flap (342), when the difference between the pressure of the second chamber (2) and the pressure of the first chamber (1) is not greater than a preset pressure difference, the sealing valve flap (342) cuts off the air inlet channel (31); when the difference between the pressure of the second chamber (2) and the pressure of the first chamber (1) is greater than the preset pressure difference, the sealing valve flap (342) connects the air inlet channel (31); an air outlet channel (32) formed through the sealing valve flap (342).

3. The water hammer arrestor of claim 2, wherein, The air inlet unit (34) further comprises: a valve seat (341) fixed in the air inlet channel (31), the valve seat (341) being provided with a valve seat inlet in the middle, and the sealing valve flap (342) being arranged on the side of the valve seat inlet close to the first chamber (1) to be pressed against the valve seat inlet to cut off the air inlet channel (31); a resilient normally closed mechanism comprising a resilient member (343) and a pull rod (344), the resilient member (343) being fixed on one side of the valve seat (341), and one end of the pull rod (344) being fixed to the resilient member (343) and the other end being fixed to the sealing valve flap (342) to make the sealing valve flap (342) pressed against the valve seat inlet.

4. The water hammer arrestor of claim 2, wherein, The suction micro-discharge valve core further comprises: a shut-off valve core (33) arranged at the air outlet channel (32), the shut-off valve core (33) being closed when the first chamber (1) is filled with liquid.

5. The water hammer arrestor of claim 4, wherein, The shut-off valve core (33) comprises: a valve flap (331), the air outlet channel (32) being provided with an air outlet (321), and the valve flap (331) being arranged on the side of the air outlet (321) facing the direction of gravity; a float (332) linked with the valve flap (331) and applying its own gravity to the valve flap (331), when the water level rises to the position of the float (332), the float (332) rises with the water level and drives the valve flap (331) to be pressed against the air outlet (321).

6. The water hammer arrestor of claim 4, wherein, The cross-sectional area of the air outlet channel (32) is smaller than that of the air inlet channel (31).

7. The water hammer arrestor of claim 6, wherein, The inner diameter of the air outlet channel (32) is 1.6-5 mm.

8. The water hammer arrestor of any one of claims 1-7, wherein, The utility model further comprises: A pressure regulating unit is in communication with the pressure regulating port (21) and is used to charge / discharge air into the second chamber (2) to regulate the pressure in the second chamber (2).

9. The water hammer arrestor of claim 8, wherein, The first chamber (1) and the second chamber (2) are formed by a partition (4) in a tank body.

10. The water hammer arrestor of claim 8, wherein, The first chamber (1) and the second chamber (2) are formed by a partition (4) in a tank body. The first chamber (1) and the second chamber (2) are formed by a partition (4) in a tank body.

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