Water hammer protection device

Abstract

The utility model discloses a water hammer protection device, which comprises a water supply pipe, a water outlet pipe, a water inlet pipe and a water outlet pipe, a hollow valve cavity is defined in the valve body, a water inlet is formed in the lower end of the valve body, and the water inlet is communicated with a water supply pipe; the water pressure sensor is arranged on the water inlet to detect the water pressure of the water inlet; an exhaust port is formed in the upper end of the valve body, and the first air pressure sensor is arranged on the exhaust port to detect the air pressure of the exhaust port; the controller is electrically connected with the switch valve, the water pressure sensor and the first air pressure sensor, and the controller controls the opening degree of the switch valve according to data fed back by the water pressure sensor and / or the first air pressure sensor. The structure is simple, the pressure of the pipe network can be effectively monitored, and therefore the risk of water hammer generation in the pipe network can be accurately controlled, and meanwhile the risk can be effectively eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a water hammer protection device. Background Art

[0002] Water hammer refers to the phenomenon of large pressure fluctuations and vibrations caused by sudden changes in fluid flow within a closed piping system (including pumps). This phenomenon is also known as "water shock." The instantaneous pressure can significantly exceed normal pressure, often resulting in destructive effects. To prevent or mitigate water hammer, existing technologies mostly employ water hammer arresters and a series of measures and auxiliary equipment to mitigate the effects. However, water hammer arresters are less than ideal and cannot effectively eliminate water hammer. Furthermore, auxiliary equipment and other measures may be limited by environmental factors such as the site, limiting their applicability. Summary of the Invention

[0003] The present invention aims to solve, at least to a certain extent, one of the problems existing in the existing related technologies. To this end, the present invention proposes a water hammer protection device with a simple structure that can effectively monitor the pressure of the pipeline network, thereby accurately controlling the risk of water hammer in the pipeline network and effectively eliminating it.

[0004] The above purpose is achieved through the following technical solutions:

[0005] A water hammer protection device, comprising:

[0006] a water supply pipe, on which an on-off valve is provided;

[0007] a valve body, wherein a hollow valve cavity is defined in the valve body, and a water inlet is opened at the lower end of the valve body, and the water inlet is connected to the water supply pipe;

[0008] a water pressure sensor, the water pressure sensor being arranged on the water inlet to detect the water pressure of the water inlet;

[0009] a first air pressure sensor, wherein an exhaust port is provided at an upper end of the valve body, and the first air pressure sensor is disposed on the exhaust port to detect the air pressure at the exhaust port;

[0010] A controller is electrically connected to the switch valve, the water pressure sensor, and the first air pressure sensor respectively, and the controller controls the opening of the switch valve according to data fed back by the water pressure sensor and / or the first air pressure sensor.

[0011] In some embodiments, the valve body has a valve seat and a valve cover, wherein a hollow lower cavity is defined in the valve seat, and a hollow upper cavity is defined in the valve cover, the lower end of the upper cavity is connected to the upper end of the lower cavity to jointly form the valve cavity, the exhaust port is opened on the valve cover, and an air outlet is opened on the valve seat.

[0012] In some embodiments, a second air pressure sensor electrically connected to the controller is further included, and the second air pressure sensor is disposed at the air outlet.

[0013] In some embodiments, it also includes a float and an air outlet valve seat. A casing is provided in the lower cavity, and a connecting port is opened at the upper end of the casing. The lower cavity and the internal space of the casing are connected to each other through the connecting port. The float is movably provided in the casing, and a sliding body is movably provided in the casing. The air outlet valve seat is provided at the lower end of the sliding body. The float opens and closes the air outlet through the lifting and lowering movement of the float, and the sliding body controls the connection and disconnection between the upper cavity and the lower cavity through the lifting and lowering movement of the sliding body.

[0014] In some embodiments, a throttle plug is further included, which is movably disposed in the upper cavity. The throttle plug is driven to move up and down by the lifting and lowering of the float and / or the action of airflow to open and close the exhaust port, and a plurality of through holes are opened on the throttle plug to keep the upper cavity and the exhaust port in communication.

[0015] In some embodiments, a protective cover is provided at the upper end of the upper cavity, and a guide rod is provided at the middle position of the protective cover. The guide rod extends downward at one end away from the protective cover, and the throttle plug is movably provided on the guide rod so that the guide rod guides the lifting and lowering movement of the throttle plug.

[0016] In some embodiments, the sum of the opening areas of the through holes is smaller than the opening area of ​​the exhaust port.

[0017] In some embodiments, a boss is provided at the upper end of the lower cavity to limit the upward movement of the sliding body.

[0018] In some embodiments, in the vertical direction, the communication port is located at a lower height than the boss.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] 1. The water hammer protection device of the present invention has a simple structure and can effectively monitor the pressure of the pipe network, thereby accurately controlling the risk of water hammer in the pipe network and effectively eliminating it. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a block diagram of the water hammer protection device in the embodiment of the present utility model;

[0023] Figure 2 It is a structural schematic diagram of the valve body in an embodiment of the present utility model. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without inventive effort shall fall within the scope of the technical solutions claimed for protection by the present invention.

[0026] Example:

[0027] like Figure 1 and 2 As shown, this embodiment provides a water hammer protection device, comprising:

[0028] A water supply pipe, on which a switch valve 5 is provided;

[0029] The valve body 1 defines a hollow valve cavity 11 therein, and a water inlet is provided at the lower end of the valve body 1, the water inlet being connected to the water supply pipe;

[0030] Water pressure sensor 2, which is arranged on the water inlet to detect the water pressure at the water inlet;

[0031] A first air pressure sensor 3 is provided at the upper end of the valve body 1 with an exhaust port. The first air pressure sensor 3 is provided on the exhaust port to detect the air pressure at the exhaust port.

[0032] The controller 4 is electrically connected to the switch valve 5 , the water pressure sensor 2 , and the first air pressure sensor 3 , respectively. The controller 4 controls the opening of the switch valve 5 according to the data fed back by the water pressure sensor 2 and / or the first air pressure sensor 3 .

[0033] In this embodiment, a water pressure sensor 2 is provided on the water inlet to detect the water pressure of the water inlet, and the detected water pressure information is fed back to the controller 4. An exhaust port is provided at the upper end of the valve body 1, and a first air pressure sensor 3 is provided on the exhaust port to detect the air pressure of the exhaust port, and the detected air pressure information of the exhaust port is fed back to the controller 4. The controller 4 controls the opening of the switch valve 5 according to the received information, thereby adjusting the air pressure in the water supply pipe until the air pressure reaches a stable state. It has a simple structure and can effectively monitor the pressure of the pipeline network, thereby accurately controlling the risk of water hammer in the pipeline network, and can also effectively eliminate it. By effectively eliminating the risk of pipeline water hammer, the maintenance cost of the pipeline pump room is further reduced.

[0034] Furthermore, the valve body 1 has a valve seat 12 and a valve cover 13, wherein a hollow lower cavity is defined in the valve seat 12, and a hollow upper cavity is defined in the valve cover 13, the lower end of the upper cavity is connected to the upper end of the lower cavity to jointly form a valve cavity 11, an exhaust port is opened on the valve cover 13, and an air outlet is opened on the valve seat 12.

[0035] Specifically, it also includes a second air pressure sensor 6 electrically connected to the controller 4, and the second air pressure sensor 6 is arranged at the air outlet.

[0036] In this embodiment, a hollow lower cavity is defined in the valve seat 12, and a hollow upper cavity is defined in the valve cover 13. The lower end of the upper cavity is connected to the upper end of the lower cavity to jointly form a valve cavity 11. The exhaust port is opened on the valve cover 13, and an air outlet is opened on the valve seat 12. The second air pressure sensor 6 is arranged at the position of the air outlet. The second air pressure sensor 6 detects the air pressure of the air outlet and feeds back the detected air pressure information of the air outlet to the controller 4. The controller 4 can control the opening of the switch valve 5 according to the received information, thereby adjusting the air pressure in the water supply pipe until the air pressure reaches a stable state.

[0037] Preferably, it also includes a float 16 and an air outlet valve seat 12, a casing 14 is provided in the lower cavity, a connecting port 15 is opened at the upper end of the casing 14, and the lower cavity and the internal space of the casing 14 are connected to each other through the connecting port 15, the float 16 is movably provided in the casing 14, a sliding body 7 is movably provided in the casing 14, and the air outlet valve seat 12 is provided at the lower end of the sliding body 7, the float 16 is opened and closed by the lifting movement of the float 16, and the sliding body 7 is controlled by the lifting movement of the sliding body 7 to control the connection and disconnection between the upper cavity and the lower cavity.

[0038] Furthermore, it also includes a throttle plug 8, which is movably arranged in the upper cavity. The throttle plug 8 is driven to move up and down by the lifting and lowering of the float 16 and / or the action of airflow to open and close the exhaust port, and a number of through holes are opened on the throttle plug 8 to keep the upper cavity and the exhaust port connected.

[0039] Specifically, a protective cover 17 is provided at the upper end of the upper cavity, and a guide rod 18 is provided at the middle position of the protective cover 17. The guide rod 18 extends downward at one end away from the protective cover 17, and the throttle plug 8 is movably provided on the guide rod 18 so that the guide rod 18 guides the lifting and lowering movement of the throttle plug 8.

[0040] Preferably, the sum of the opening areas of the through holes is smaller than the opening area of ​​the exhaust port.

[0041] Furthermore, a boss 19 is provided at the upper end of the lower cavity to limit the upward movement of the sliding body 7 .

[0042] In particular, in the vertical direction, the communication port 15 is located at a height lower than that of the boss 19 .

[0043] In this embodiment, when the water hammer is in the initial state, the float 16 with a counterweight is located at the bottom of the lower cavity, the sealing surface of the float 16 is always facing upward and in contact with the sealing surface of the outlet valve seat 12 to close the outlet, and the sliding body 7 is supported by the outlet valve seat 12. At the same time, since the throttle plug 8 is located at the bottom of the upper cavity, the exhaust channel between the upper cavity and the throttle plug 8 is in the maximum flow area state.

[0044] When the water supply pipe is filled with water, a high-speed airflow enters the internal space of the valve body 1 through the water inlet at the lower part of the valve body 1. The water flowing into the valve body 1 enters the upper end position of the valve body 1 along the annular channel between the casing 14 and the valve cavity 11, and then passes through the connecting port 15 of the casing 14, the internal space of the casing 14, the upper cavity, the channel between the throttle plug 8 and the throttle cylinder, the protective cover 17, and the exhaust port before being discharged into the atmosphere; the high-speed exhaust airflow basically does not directly blow towards the float 16 and the sliding body 7, so no blockage will occur during high-speed exhaust, and the throttle plug 8 remains stationary before the high-speed exhaust pressure difference is lower than the set value.

[0045] When the water filling rate is too fast, the exhaust pressure differential increases to a set value, and the throttle plug 8 is blown up by the airflow, blocking the exhaust port, leaving only the multiple through-holes on the throttle plug 8 for exhaust. At this time, the exhaust area is reduced, resulting in a decrease in exhaust volume. The trapped air in the pipeline forms a buffer air pocket, slowing the water filling rate, reducing the energy of the water column, and preventing water hammer caused by excessive water filling. However, exhaust from the throttle plug 8 continues at this time, and the exhaust valve is not closed, so the exhaust valve closing water hammer phenomenon will not occur.

[0046] When the water supply pipe is full of water, the water level rises and enters the valve body 1 to submerge the float 16 and the sliding body 7. The float 16 and the sliding body 7 float upward under the buoyancy of the water, and the sliding body 7 abuts against the boss 19 so that the sealing surface of the sliding body 7 blocks the connecting end between the lower cavity and the upper cavity, thereby forming a seal for the exhaust port. At the same time, the sealing surface of the float 16 contacts the outlet valve seat 12 to form a seal for the outlet, so that neither water nor gas can be discharged through the outlet. At this time, the throttle plug 8 falls to the bottom position of the upper cavity due to the lack of support from the exhaust pressure difference, thereby returning to its initial state.

[0047] After the exhaust port and the air outlet are sealed, if there is unexhausted or precipitated gas in the water supply pipe, it will accumulate in the anti-water hammer air valve installed at a local high point in the pipeline. When the accumulated gas increases and the air pressure rises to a level greater than the water pressure at that point, this air pressure will, on the one hand, support the slider 7 to keep the exhaust port sealed, and on the other hand, force the water level that submerges the float 16 to drop, causing the float 16 to fall and open the air outlet, and the air outlet valve seat 12 to begin a micro-exhaust operation. As the micro-exhaust continues, the accumulated air pressure decreases, while the water level rises synchronously. As the water level rises, the float 16 contacts the air outlet valve seat 12 again to close the air outlet. Therefore, the air outlet valve seat 12 can allow gas to be discharged through the air outlet valve seat 12, but water cannot. This achieves functions such as exhausting as soon as gas is present, closing after exhausting, intermittent exhausting, and exhausting only without draining water, thereby maximally emptying the gas in the water supply pipe.

[0048] When negative pressure appears in the water supply pipe due to stopping the pump or draining the water, the water level drops, the outside air pressure is greater than the water pressure in the water supply pipe, the sliding body 7 and the float 16 fall, and the exhaust port opens, so that a large amount of outside air can be immediately sucked in to eliminate the vacuum in the water supply pipe.

[0049] More preferably, a sealing ring is provided in the middle position between the valve seat 12 and the valve cover 13, so that the connection between the upper cavity and the lower cavity is sealed by the sealing ring. Since the sliding body 7 is made of ultra-high molecular weight polyethylene material, the surface is smooth and never rusts, and a flat seal is formed with the sealing ring rather than a tight seal. No sticking phenomenon will occur due to long-term sealing. Therefore, it can be instantly separated from the surface of the sealing ring when negative pressure occurs.

[0050] Specifically, if the water hammer protection device needs to exhaust a large amount of air, when the water supply pipe is empty and filled with water, the float 16 falls to the lower position of the casing 14, and the exhaust port is opened to perform a large amount of exhaust. When the air is discharged outward through the exhaust port, water begins to accumulate in the valve cavity 11, and the float 16 floats up due to the buoyancy until the sliding body 7 is lifted to the position of the boss 19 so that the float 16 contacts the outlet valve seat 12, thereby disconnecting the conductive relationship between the upper cavity and the lower cavity, and stopping the large amount of exhaust.

[0051] When the water hammer protection device requires a small amount of exhaust, when the pipeline is fully filled with water and operating normally, dissolved gas in the water will precipitate and gradually accumulate in the upper cavity installed at a high point. When the gas accumulated in the upper cavity increases and the air pressure rises to a value greater than the pressure there, the slider 7 will press against the boss 19 to keep the exhaust port sealed. At the same time, the water level submerging the float 16 will be forced to drop, causing the float 16 to fall and open the outlet, thus starting the small amount of exhaust. As the small amount of exhaust continues, the air pressure accumulated here will drop, the water level will rise, and the float 16 will seal the outlet again as the water level rises, thus completing the small amount of exhaust.

[0052] If the water hammer protection device needs to absorb a large amount of air, when the water pump stops, the water in the water supply pipe is empty or when negative pressure is generated in the pipe, the water level drops, causing the float 16 and the sliding body 7 to fall together and move downward quickly, thereby synchronously opening the air outlet and the exhaust port to inhale outside air, so that a large amount of air can be absorbed.

[0053] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A water hammer protection device, characterized in that: include: a water supply pipe, on which an on-off valve (5) is provided; A valve body (1), wherein a hollow valve cavity (11) is defined in the valve body (1), and a water inlet is provided at the lower end of the valve body (1), wherein the water inlet is connected to the water supply pipe; a water pressure sensor (2), the water pressure sensor (2) being arranged on the water inlet to detect the water pressure of the water inlet; A first air pressure sensor (3) is provided with an exhaust port at the upper end of the valve body (1), and the first air pressure sensor (3) is arranged on the exhaust port to detect the air pressure of the exhaust port; A controller (4), wherein the controller (4) is electrically connected to the switch valve (5), the water pressure sensor (2), and the first air pressure sensor (3), respectively, and the controller (4) controls the opening of the switch valve (5) according to data fed back by the water pressure sensor (2) and / or the first air pressure sensor (3).

2. A water hammer protection device according to claim 1, characterized in that: The valve body (1) has a valve seat (12) and a valve cover (13), wherein a hollow lower cavity is defined in the valve seat (12), and a hollow upper cavity is defined in the valve cover (13), the lower end of the upper cavity is connected to the upper end of the lower cavity to form the valve cavity (11), the exhaust port is opened on the valve cover (13), and an air outlet is opened on the valve seat (12).

3. A water hammer protection device according to claim 2, characterized in that: It also includes a second air pressure sensor (6) electrically connected to the controller (4), and the second air pressure sensor (6) is arranged at the air outlet position.

4. A water hammer protection device according to claim 2, characterized in that: The invention also includes a float (16) and an air outlet valve seat (12). A casing (14) is provided in the lower cavity. A communication port (15) is provided at the upper end of the casing (14). The lower cavity and the internal space of the casing (14) are communicated with each other through the communication port (15). The float (16) is movably provided in the casing (14). A sliding body (7) is movably provided in the casing (14). The air outlet valve seat (12) is provided at the lower end of the sliding body (7). The float (16) opens and closes the air outlet through the lifting movement of the float (16). At the same time, the sliding body (7) controls the opening and closing between the upper cavity and the lower cavity through the lifting movement of the sliding body (7).

5. A water hammer protection device according to claim 4, characterized in that: The invention also includes a throttle plug (8), which is movably arranged in the upper cavity. The throttle plug (8) is driven to move up and down by the lifting and lowering of the float (16) and / or the action of airflow to open and close the exhaust port, and a plurality of through holes are opened on the throttle plug (8) so that the upper cavity and the exhaust port are kept in communication.

6. A water hammer protection device according to claim 5, characterized in that: A protective cover (17) is provided at the upper end of the upper cavity, and a guide rod (18) is provided at the middle position of the protective cover (17). The guide rod (18) extends downward at one end away from the protective cover (17), and the throttle plug (8) is movably provided on the guide rod (18) so that the guide rod (18) guides the lifting movement of the throttle plug (8).

7. The water hammer protection device according to claim 5, characterized in that: The sum of the opening areas of the through holes is smaller than the opening area of ​​the exhaust port.

8. The water hammer protection device according to claim 5, characterized in that: A boss (19) is provided at the upper end of the lower cavity to limit the upward movement of the sliding body (7).

9. The water hammer protection device according to claim 8, characterized in that: In the vertical direction, the position height of the communication port (15) is lower than the position height of the boss (19).

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