Water hammer protection equipment

Abstract

The utility model relates to the technical field of water delivery pipeline systems, and discloses a water hammer protection device which comprises a container, an air suction port and a switch device, and the container is provided with a medium inlet and outlet used for communicating an inner cavity of the container with an external pipeline; the air suction port is positioned at the top of the container and is communicated with an inner cavity of the container; the switch device is arranged at the air suction port and enables the air suction port to be sealed and closed in a normal state, and when the pressure of the inner cavity of the container is smaller than the external atmospheric pressure, the switch device opens the air suction port. Compared with a water hammer elimination tank, the water hammer protection equipment has no inner container, has no risk of inner container breakage, still has strong capability of reducing pressure and replenishing water for a pipeline, and is simple in structure and high in reliability; compared with a pressure regulating tower, the water hammer protection equipment is provided with the air bag with pressure, the pressure reducing and water supplementing capacity is greatly improved, and the water hammer protection equipment can have smaller size and height.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pipeline system technical field more specifically, relate to a water hammer protection equipment. BACKGROUND

[0002] Generally, in the water pipe system, when the pump stops suddenly or the valve closes suddenly, etc. The transient state of rapid change of flow and pressure will appear, which is called water hammer. When water hammer occurs, due to the propagation of pressure wave caused by the sudden change of flow in the pipe, the pressure in the pipe rises rapidly, or the pressure in the pipe drops, and the pipeline may collapse or be damaged due to the shock wave.

[0003] In order to prevent the problem of water hammer damage and loss, a water hammer protection device such as a water hammer elimination tank or a bidirectional pressure regulating tower is generally provided in the pump water pipeline system to supplement water to the pipeline or absorb the excessive pressure in the pipeline, so as to reduce the water hammer phenomenon caused by the change of fluid flow in the pipeline.

[0004] In the prior art, the water hammer elimination tank is usually a pressure tank with an inner container, which extrudes the capsule inner container by pre-charged compressed gas, so as to offset the pressure fluctuation of the water entering the capsule inner container. Due to the action of high-pressure gas, compared with the normal-pressure pressure regulating tower, the water hammer elimination tank can have smaller volume and height under the same pipeline pressure condition, but the capsule inner container has the risk of capsule rupture and damage when absorbing the positive pressure of the pipeline, and the entering pipeline with throttling and energy dissipation function needs to be designed to reduce the positive pressure peak. Whether it is a pressure regulating tower or a water hammer elimination tank, other valves or accessories are needed to realize its function, and its application site is also limited by certain factors. UTILITY MODEL CONTENTS

[0005] The utility model provides a water hammer protection equipment, which aims to overcome the above-mentioned problems existing in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the technical scheme as follows:

[0007] A water hammer protection equipment, comprising:

[0008] A container having a medium inlet and outlet for communicating the inner cavity thereof with the external pipeline;

[0009] An air inlet located at the top of the container and communicating with the inner cavity of the container;

[0010] A switching device provided at the air inlet and keeping the air inlet normally sealed and closed, and when the pressure in the inner cavity of the container is less than the external atmospheric pressure, the switching device opens the air inlet.

[0011] As a further improvement, the water hammer protection device further comprises an exhaust valve, which is in communication with the inner cavity of the container, and the exhaust port of the exhaust valve is located at the bottom of the container.

[0012] As a further improvement, the switch device comprises a valve flap, a guide and a power component, the valve flap is movably installed at the air inlet through the guide, the power component is connected with the valve flap and / or the guide, and the power component provides power to drive the valve flap to close or open the air inlet.

[0013] As a further improvement, the guide comprises a guide rod and a bracket, the bracket is fixedly connected at the air inlet, one end of the guide rod is connected with the valve flap, and the guide rod movably cooperates with the bracket; and the power component is an elastic member.

[0014] As a further improvement, the air inlet is arranged on the container.

[0015] As a further improvement, the top of the container is connected with at least one air valve through a flange, the air inlet is arranged on the valve body of the air valve, and the switch device is a valve core of the air valve.

[0016] As a further improvement, a dustproof filter cover is mounted at the outer end of the air inlet.

[0017] As a further improvement, the water hammer protection device further comprises a pressure detection device in communication with the inner cavity of the container.

[0018] As a further improvement, a safety valve in communication with the inner cavity is mounted on the container.

[0019] As a further improvement, the water hammer protection device further comprises a liquid level monitoring device connected with the container.

[0020] Compared with the prior art, the technical scheme has the following beneficial effects:

[0021] 1. The water hammer protection equipment of the utility model, a certain amount of water is pre-stored in the container when the pipeline is filled with water, because the container is closed, the air in the cavity of the container cannot be discharged, a pressure air bag is formed in the container, the pressure in the water conveying pipeline can be balanced, when pressure fluctuation occurs in the pipeline, the pipeline pressure increases, water will flow into the container to continue to squeeze the air bag, the air bag can offset the impact of water, the pipeline pressure decreases, under the action of air mass pressure, water will be replenished into the pipeline, so that the negative pressure generated in the pipeline can be eliminated at the source, and the function of preventing water hammer is achieved. Compared with the water hammer elimination tank, the water hammer protection equipment has no inner container and no risk of inner container rupture, but the ability of pipeline pressure reduction and water replenishment is still very strong, and the structure is simple and the reliability is high. Compared with the pressure regulating tower, the water hammer protection equipment has a pressure air bag, the pressure reduction and water replenishment capacity is greatly improved, and the volume and height can be smaller.

[0022] 2. The water hammer protection equipment of the utility model is provided with an exhaust valve at the bottom of the container, when the liquid surface drops to the bottom of the container, the gas in the pipeline can be discharged through the exhaust valve, the air cannot be blocked in the water conveying pipeline and cannot be discharged, and the normal operation of the pipeline is not affected, which is safe and reliable.

[0023] 3. The water hammer protection equipment of the utility model is provided with a safety valve, a pressure detection device and a pressure monitoring device, so that the pressure and liquid level of the equipment can be monitored at any time, and the safe operation of the equipment is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structure schematic view of one kind of water hammer protection equipment in the embodiment;

[0025] Figure 2 It is a structure schematic view of the switch device in the embodiment;

[0026] Figure 3 It is a structure schematic view of another embodiment of the water hammer protection equipment in the embodiment;

[0027] Figure 4 It is an internal structure schematic view when the air suction valve in the embodiment is in the closed state;

[0028] Figure 5 It is an internal structure schematic view when the air suction valve in the embodiment is in the closed state.

[0029] REFERENCE SIGNS:

[0030] 1 - container, 11 - inner chamber, 12 - medium inlet and outlet, 13 - main tank body, 14 - elbow, 15 - top cover, 16 - first opening, 17 - second opening; 2 - air inlet; 3 - switch device, 31 - valve flap, 32 - guide rod, 33 - bracket, 34 - elastic member; 4 - exhaust valve; 5 - air suction valve, 51 - valve body; 6 - dustproof filter cover; 7 - pressure detection device; 8 - safety valve; 9 - liquid level monitoring device. DETAILED DESCRIPTION

[0031] To further understand the content of the present application, the present application will be described in detail in conjunction with the drawings and examples.

[0032] The structure, proportion, size, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, for understanding and reading by those skilled in the art, and are not used to limit the implementation conditions of the present application, so they do not have substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0033] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like referred to in the present specification are only for the convenience of clear description, and are not used to limit the implementation range, and the change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the implementation scope of the present application. Moreover, in addition to being used to indicate the orientation or position relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain attachment relationship or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein.

[0035] As Figures 1-5 shown, the water hammer protection device of the present embodiment includes a container 1, an air inlet 2 located at the top of the container 1, and a switch device 3. The water hammer protection device is mainly applied to a water conveying pipeline, and balances the pressure when the water in the pipeline produces pressure fluctuation, prevents negative pressure in the pipeline, and can buffer and offset the positive pressure, thereby preventing water hammer in the pipeline. It should be noted that the device is not limited to be applied to the water conveying pipeline, and in other liquid or liquid mixture pipeline conveying fields, if there is fluid medium pressure fluctuation, the device can also be used to protect against pressure impact.

[0036] In this embodiment, the container 1 has a medium inlet and outlet 12 for communicating the inner cavity 11 with external pipelines, which can be downward or directed to the side, etc. The specific direction is not limited. The container 1 is a hollow structure under normal pressure or pressure, and the specific material of the container 1 is not limited. The container 1 can be an integrally formed structure, or an overall structure formed by welding, casting or other processing methods, or a structure formed by assembling two or more separate components together with threaded parts.

[0037] For example, in an embodiment as shown in Figure 1 The container 1 includes a main tank body 13, an elbow pipe 14 and a top cover 15. The bottom of the main tank body 13 is provided with a first opening 16, one end of the elbow pipe 14 is communicated with the first opening 16 through a flange, and the other end of the elbow pipe 14 is the medium inlet and outlet 12. The elbow pipe 14 can slightly slow down the impact of the fluid medium. The top of the main tank body 13 is provided with a second opening 17, and the top cover 15 is connected to the outer end of the second opening 17. In some other embodiments, the container 1 can also be an integrated tank structure, and the top cover 15 can also not be provided, and the elbow pipe 14 can also not be provided.

[0038] The water hammer protection device of this embodiment, the air inlet 2 can be provided on the container 1 and located at the top of the container 1, the air inlet 2 is communicated with the inner cavity 11 of the container 1, for example, the container 1 of the first embodiment described above, the air inlet 2 can be provided on the top cover 15, for the container 1 of the integrated tank structure, the air inlet 2 can be directly opened on the top of the tank.

[0039] The switch device 3 in this embodiment is arranged at the air inlet 2, which can keep the air inlet 2 normally sealed and closed, and at the same time, when the pressure in the inner cavity 11 of the container 1 is less than the external atmospheric pressure, the switch device 3 can open the air inlet 2.

[0040] According to the water hammer protection device of the present embodiment, the working principle and technical effect are illustrated, for example, when the water hammer protection device is applied to the water pipeline system, the medium inlet and outlet 12 is connected with the water pipeline, and the water pump fills water into the pipeline, the water in the pipeline enters the container 1 through the medium inlet and outlet 12, because the switch device 3 keeps the air inlet 2 normally sealed and closed, the gas in the container 1 cannot be discharged, and as the gas is continuously compressed, a pressure gas pocket is formed in the container 1; during the pipeline operation, when the water flow generates a pressure drop wave, the water in the container 1 is squeezed into the pipeline under the action of the pressure gas pocket, eliminating the pressure drop of the water flow in the pipeline, preventing the generation of pressure drop / negative pressure water hammer, and when the water flow generates a pressure rise wave, the container 1 acts as a buffer space, water can continue to enter the container 1 and compress the gas pocket, and the reaction force of the gas pocket can buffer the positive pressure wave, reduce the pressure peak, thereby preventing the pressure rise / positive pressure water hammer.

[0041] Referring to Figure 1 and Figure 2 , the switching device 3 of an embodiment is provided, which comprises a valve disc 31, a guide and a power component. The valve disc 31 is movably mounted at the air inlet 2 by the guide, and the power component is connected with the valve disc 31 and / or the guide, and the power component provides power to drive the valve disc 31 to close or open the air inlet 2. Specifically, the guide comprises a guide rod 32 and a bracket 33, the bracket 33 is fixedly connected at the air inlet 2, one end of the guide rod 32 is connected with the valve disc 31, and the guide rod 32 movably cooperates with the bracket 33. The power component is an elastic member 34, which can be a compression spring or a tension spring, as long as it can provide a spring force to drive the valve disc 31 to close the air inlet 2. For example, the compression spring can be sleeved on the guide rod 32, the valve disc 31 is arranged at the lower end of the air inlet 2, the compression spring pushes the guide rod 32 and the valve disc 31 upward, so that the valve disc 31 closes the air inlet 2. When the pressure in the inner cavity 11 of the container 1 is less than the external atmospheric pressure, the compression spring can be compressed under the action of the pressure difference between the inside and outside, so that the valve disc 31 opens the air inlet 2.

[0042] In some other embodiments of the switching device 3, the guide can also be a slider and a guide rail. The power component can also be an electrically, pneumatically, hydraulically or hybrid power driven device, which can drive the valve disc 31 to act through electric control. However, it should be noted that the electric control needs to monitor the change of the pipeline pressure wave and respond in time, and in terms of safety, the switching device 3 of the first embodiment does not need to be controlled and automatically responds to the pressure change to act, which is more reliable.

[0043] Referring to Figure 3 , 4 and 5, in some other embodiments, the water hammer protection device comprises a container 1 and an air suction valve 5, at least one air suction valve 5 is connected to the top of the container 1 through a flange, and the number of the air suction valve 5 is not limited. The air suction valve 5 is a valve that can only open in one direction to suck air but cannot exhaust air. The air suction valve 5 comprises a valve body 51, the air inlet 2 is arranged on the valve body 51, and the valve core of the air suction valve 5 can realize the function of the switching device 3, so the valve core of the air suction valve 5 is the switching device 3.

[0044] In some optional embodiments, in order to prevent the suction of sundries into the container 1 through the opening of the air inlet 2 and cause pollution of water resources, a dustproof filter cover 6 is further arranged at the outer end of the air inlet 2 of the water hammer protection device. The dustproof filter cover 6 comprises a filter screen covering the air inlet 2, and by arranging appropriate mesh size, sundries and large particles can be filtered, so as to avoid pollution.

[0045] In the technical field, the skilled person will recognize that air is the culprit of obstructing the water flow in the pipeline. The air remaining in the water pipeline will obstruct the water flow. Therefore, the existing water hammer elimination tank and surge tower only supplement water to the pipeline when the pipeline pressure is reduced. However, when the pipeline negative pressure is relatively serious, the liquid level in the container 1 may drop below the medium inlet and outlet 12 after the switch device 3 is opened, that is, air may enter the pipeline. Although the inhaled air can eliminate the negative pressure of the pipeline and prevent pipe explosion, if the air accumulates, it may affect the normal operation of the pipeline. Therefore, in order to avoid this problem, the water hammer protection device of the embodiment further comprises an exhaust valve 4. The exhaust valve 4 only has an exhaust function and cannot inhale. The exhaust valve 4 is in communication with the inner cavity 11 of the container 1. The installation position of the exhaust valve 4 should not be too high. It is only necessary to be higher than the water pipeline. If it is too high, the air in the container 1 may be discharged, causing the problem of not being able to form a pressurized air bag. Therefore, the preferred solution is to arrange the exhaust valve 4 near the bottom of the container 1. The position of the exhaust port of the exhaust valve 4 is located at the bottom of the container 1. Through the arrangement of the exhaust valve 4, in application, the air in the container 1 and the atmosphere can enter the water pipeline through the medium inlet and outlet 12, and can also be discharged through the exhaust valve 4, thereby eliminating the air in the pipeline and enabling the pipeline to operate normally again.

[0046] In some optional embodiments, the water hammer protection device further comprises a pressure detection device 7 in communication with the inner cavity 11 of the container 1. The pressure detection device 7 can be a pressure sensor and is mainly used for detecting the pressure in the container 1 to ensure the safe operation of the device.

[0047] In some optional embodiments, the container 1 is provided with a safety valve 8 in communication with the inner cavity 11 thereof. The safety valve 8 can be opened when the pressure in the container 1 exceeds a predetermined threshold, thereby eliminating the safety hazard.

[0048] In some optional embodiments, the water hammer protection device further comprises a liquid level monitoring device 9 connected to the container 1. The liquid level monitoring device 9 is mainly used for monitoring the liquid level in the container 1. The liquid level monitoring device 9 can be a liquid level meter or a liquid level sensor. For example, the liquid level meter can be a magnetic flap liquid level meter, which is connected to the top and bottom of the container 1 at both ends, so that the liquid level of the container 1 can be directly observed. The liquid level sensor can be any one or a combination of a magnetostrictive liquid level detector, a photoelectric liquid level sensor, an ultrasonic liquid level sensor, and a float type liquid level sensor.

[0049] The terms "mounting", "arrangement", "provided with", "connected" should be interpreted broadly. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] The above describes the present application and its embodiments in a schematic manner, which is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this, without departing from the creative purpose of the present application, similar structural modes and embodiments can be designed without creativity, which should belong to the protection scope of the present application.

Claims

1. A water hammer protection apparatus, characterized by: The utility model relates to a container with a switch device and a pressure detection device, and belongs to the technical field of containers. The container (1) has a medium inlet and outlet (12) for communicating with the inner cavity (11) and external pipeline; The air inlet (2) is located at the top of the container (1) and communicates with the inner cavity (11) of the container (1); The switch device (3) is arranged at the air inlet (2) and keeps the air inlet (2) normally closed, and opens the air inlet (2) when the pressure in the inner cavity (11) of the container (1) is less than the external atmospheric pressure.

2. The water hammer arrestment device of claim 1, wherein: The exhaust valve (4) is also included, which communicates with the inner cavity (11) of the container (1), and the position of the exhaust port of the exhaust valve (4) is at the bottom of the container (1).

3. The water hammer arrestment device of claim 1, wherein: The switch device (3) includes a valve flap (31), a guide and a power component, the valve flap (31) is movably installed at the air inlet (2) through the guide, and the power component is connected with the valve flap (31) and / or the guide, and the power component provides power to drive the valve flap (31) to close or open the air inlet (2).

4. The water hammer arrestment device of claim 3, wherein: The guide includes a guide rod (32) and a bracket (33), the bracket (33) is fixedly connected at the air inlet (2), one end of the guide rod (32) is connected with the valve flap (31), and the guide rod (32) movably cooperates with the bracket (33); and the power component is an elastic member (34).

5. The water hammer arrestment device of claim 4, wherein: The air inlet (2) is arranged on the container (1).

6. The water hammer arrestment device of claim 4, wherein: The top of the container (1) is connected with at least one air inlet valve (5) through a flange, the air inlet (2) is arranged on the valve body (51) of the air inlet valve (5), and the switch device (3) is the valve core of the air inlet valve (5).

7. A water hammer arrestment device according to any one of claims 1-6, characterized in that: A dustproof filter cover (6) is mounted at the outer end of the air inlet (2).

8. A water hammer arrestment device according to any one of claims 1-6, characterized in that: The utility model also includes a pressure detection device (7) connected with the inner cavity (11) of the container (1).

9. A water hammer arrestment device according to any one of claims 1-6, characterized in that: A safety valve (8) is mounted on the container (1) and communicates with the inner cavity (11).

10. A water hammer arrestment device according to any one of claims 1-6, characterized in that: The utility model also includes a liquid level monitoring device (9) connected with the container (1).

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