Water hammer protection device of water supply pipeline

Abstract

The utility model relates to a water hammer protection device of a water supply pipeline. The method is suitable for the technical field of water conservancy and hydropower engineering. According to the technical scheme, the device comprises a pressure tank arranged on a water supply pipeline, and a separator is arranged in the pressure tank; the air charging and discharging assembly is mounted on the outer wall of the pressure tank and can be used for charging air into the upper cavity or discharging air from the upper cavity; the two ends of the pressure regulating assembly communicate with the upper cavity and the lower cavity correspondingly, and connection and disconnection between the upper cavity and the lower cavity can be controlled; the detection assembly is arranged in the upper cavity and the lower cavity, and the detection assembly can detect first pressure information in the upper cavity, second pressure information in the lower cavity and water level information in the lower cavity; and the control module is connected with the air charging and discharging assembly, the pressure adjusting assembly and the detection assembly, and starts the air charging and discharging assembly to adjust pressure based on a pressure difference value between the first pressure information and the second pressure information, so that a preset pressure difference value is maintained between the first pressure information and the second pressure information.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy and hydropower engineering technology, and in particular to a water hammer protection device for water supply pipelines. Background Technology

[0002] With the rapid development of water conservancy and hydropower engineering in my country, long-distance water supply pipelines are being used more and more widely in water conservancy projects. However, long-distance water supply pipelines are susceptible to water hammer during operation, posing a significant threat to their safe operation.

[0003] Water hammer is a pressure fluctuation phenomenon caused by a sudden change in fluid velocity. In water supply projects, water hammer mainly occurs during conditions such as rapid opening and closing of valves or power outages and shutdowns of water pumps. In these situations, the water flow velocity within the pipeline changes rapidly, leading to a significant increase or decrease in pipeline pressure. Water hammer not only causes severe vibrations in the pipeline but can also lead to pipeline ruptures, joint leaks, severely shorten the pipeline's service life, and even cause safety accidents.

[0004] Air tanks are commonly used in water supply projects to protect against positive and negative water hammer in pipelines. An air tank of a certain volume is installed after the pump, utilizing the compressibility and expansion of air to absorb and release water hammer energy, thereby reducing the impact of water hammer on the pipeline. Air tanks come in two main forms:

[0005] (1) Air tanks equipped with airbags can effectively protect against positive and negative water hammer, but the cost of airbags is high, which increases the project investment cost. Moreover, there is a risk of airbag rupture during use. Once ruptured, it may cause water pollution and affect water supply safety.

[0006] (2) Air tanks without air bladders: While this type of air tank avoids the problems of air bladder rupture and water pollution, it has the problem of high-pressure gas dissolving in water. This will lead to a decrease in gas pressure inside the air tank, weakening the protective effect, requiring frequent air replenishment, and increasing the complexity of operation and maintenance. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a water hammer protection device for water supply pipelines, in view of the above-mentioned problems.

[0008] The technical solution adopted by this utility model is: a water hammer protection device for water supply pipelines, comprising:

[0009] A pressure tank is installed on a water supply pipeline. The pressure tank has an internal partition that can divide the interior of the pressure tank into an upper chamber for storing gas and a lower chamber for storing water. The lower chamber is connected to the water supply pipeline.

[0010] An inflation / deflation assembly is installed on the outer wall of the pressure tank, and the inflation / deflation assembly is capable of inflating or deflating the upper chamber.

[0011] The pressure regulating component has two ends connected to the upper chamber and the lower chamber respectively, and can control the connection and disconnection between the upper chamber and the lower chamber;

[0012] A detection component is disposed in the upper chamber and the lower chamber. The detection component is capable of detecting the first pressure information of the gas in the upper chamber, the second pressure information of the water in the lower chamber, and the water level information in the lower chamber.

[0013] The control module is connected to the inflation / deflation assembly, the pressure regulating assembly, and the detection assembly. Based on the pressure difference between the first pressure information and the second pressure information, the control module starts the inflation / deflation assembly to regulate the pressure, so that the first pressure information and the second pressure information maintain a preset pressure difference. The control module can control the pressure regulating assembly to connect the upper chamber and the lower chamber to enhance the water hammer protection effect.

[0014] By employing the aforementioned technical means, the pressure tank is divided into an upper and lower chamber using a separator, effectively isolating water and air. This eliminates the need for an airbag, reducing costs. A pressure regulating component controls the flow between the upper and lower chambers. In the event of a power outage, the energy from the airbag can be released to quickly replenish water, protecting against negative water hammer in the pipeline. Conversely, when water hammer waves return, an airbag can be formed in the lower chamber to reduce positive water hammer. During normal operation, a detection component monitors the pressure difference between the upper and lower chambers and uses an inflation / deflation component to regulate the air pressure in the upper chamber, maintaining a constant pressure difference between them.

[0015] In some embodiments, the pressure regulating assembly includes a first connecting pipe, an air valve, and a first electric valve. The first electric valve is connected to the control module. The two ends of the first connecting pipe are respectively connected to the upper chamber and the lower chamber. The air valve and the first electric valve are provided on the first connecting pipe.

[0016] In some embodiments, the inflation / deflation assembly includes an air compressor and a second electric valve. The second electric valve is installed on the outer wall of the upper chamber of the pressure tank and connected to the air compressor. Both the air compressor and the second electric valve are connected to the control module. The air compressor can control the inflation of air into the upper chamber, and the second electric valve can control the deflation of air from the upper chamber.

[0017] In some embodiments, the control module has two operating modes, including a normal mode and an emergency mode. When the control module receives a switching signal, the control module switches the normal mode to the emergency mode.

[0018] In some embodiments, the normal mode is to control the second electric valve or air compressor to open via the control module. When the second pressure information continuously decreases or increases beyond a preset value within a preset time, the control module controls the inflation / deflation assembly to adjust the upper chamber to vent outward or inflate inward, so that a preset pressure difference value is maintained between the first pressure information and the second pressure information.

[0019] In some embodiments, the switching signal is when the water level information drops rapidly beyond a preset value within a preset time. The emergency mode is when the water level information in the lower chamber drops to the lowest water level or rises to the highest water level, the control module can control the first electric valve to close or open, and repeatedly adjust until the change range between the highest water level and the adjacent lowest water level is less than a preset range. The control module then opens the first electric valve to end the emergency mode.

[0020] In some embodiments, the partition is a blind end, which has a convex spherical structure, and the end of the first connecting pipe that connects to the lower chamber is located near the blind end.

[0021] In some embodiments, the detection component includes a first pressure sensor, a second pressure sensor, and a level gauge. The first pressure sensor is disposed in the upper chamber, and the second pressure sensor and the level gauge are disposed in the lower chamber. The first pressure sensor, the second pressure sensor, and the level gauge are all communicatively connected to the control module. The first pressure sensor can detect first pressure information in the upper chamber, the second pressure sensor can detect second pressure information in the lower chamber, and the level gauge can detect the water level information in the lower chamber.

[0022] In some embodiments, the height of the upper chamber and the height of the lower chamber in the air tank pressure vessel satisfy the following relationship:

[0023]

[0024] Among them, H a H is the height of the upper chamber of the pressure tank. w P is the height of the lower chamber of the pressure tank. max H represents the maximum head of the water pump, ΔP is the preset pressure difference between the upper and lower chambers, and H is the maximum head of the water pump. d This is the lowest water level in the lower chamber.

[0025] In some embodiments, the outer wall of the pressure tank is further provided with a safety valve that can connect to the upper chamber, and the lower chamber is connected to the water supply pipe via the second connecting pipe.

[0026] Another technical solution adopted by this utility model is: an operation method of a water hammer protection device for a water supply pipeline, the operation method including a normal mode and an emergency mode;

[0027] When the water hammer protection device is in normal mode, the following steps are included:

[0028] A1. The first electric valve remains open, and the inflation / deflation assembly remains closed.

[0029] A2. If the measured second pressure information continuously and slowly decreases beyond the preset pressure difference value, open the inflation and deflation assembly to control the upper chamber to vent until the preset pressure difference value is maintained between the first pressure information and the second pressure information, and then close the inflation and deflation assembly.

[0030] A3. If the measured second pressure information continuously and slowly rises above the preset pressure difference value, open the inflation / deflation assembly to control the upper chamber to replenish air until the preset pressure difference value is maintained between the first pressure information and the second pressure information, and then close the inflation / deflation assembly.

[0031] When the water level is detected to drop continuously within a preset time exceeding a preset water level difference, the normal mode will be switched to the emergency mode.

[0032] When the water hammer protection device is in emergency mode, the following steps are included:

[0033] B1. When the water level in the lower chamber drops to the lowest level, the first electric valve closes.

[0034] B2. When the water level in the lower chamber rises to the highest water level, the first electric valve opens;

[0035] B3. Repeat steps B1 and B2 until the water level change between the highest point and the adjacent lowest point is less than the preset range. Then, the first electric valve opens and remains open, ending the emergency mode.

[0036] The beneficial effects of the utility model are:

[0037] 1. The pressure tank is divided into an upper and lower chamber by a partition, separating the water and gas. Compared to an airbag structure, this significantly reduces equipment costs. Furthermore, this device has a small footprint, an aesthetically pleasing structure, and is easy to install and maintain.

[0038] 2. In the event of a dangerous situation such as a power outage of the water pump, when the water pressure in the lower chamber decreases, the air valve can automatically open to replenish high-pressure gas into the lower chamber and replenish water into the pipeline, preventing negative pressure in the pipeline. When the water level in the tank rises, the electric valve connected in series with the air valve quickly closes, trapping gas to form an air cushion that hinders the rise in water level in the lower chamber, reducing the pressure rise in the water supply pipeline. This can effectively reduce the water level fluctuation caused by water hammer and accelerate the attenuation of water hammer fluctuations, allowing the water supply system to reach a stable state more quickly and improving the operational safety of the system.

[0039] 3. A combination of air valves and electric valves is used to connect and isolate the upper and lower chambers, effectively protecting against both positive and negative water hammer. When protecting against negative water hammer, the air valve responds faster than the electric valve. Therefore, in the event of a power outage or other dangerous situation, the air valve quickly opens to connect the upper and lower chambers, replenishing water into the pipeline to protect against negative water hammer. However, when positive water hammer occurs, the air valve is open and its ability to trap gas is weak. Therefore, an emergency mode is set up. When the water level in the tank drops rapidly, the emergency mode is activated. When the water level reaches its lowest point, the electric valve closes, trapping gas in the lower chamber to form an air cushion. When the water level rises, the air cushion acts as a barrier, absorbing the energy of the positive water hammer and protecting against it. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of this application.

[0041] Figure 2 This is a schematic diagram of the water level change process inside the tank of this device during the power outage of the water pump.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Pressure tank; 2. End cap; 3. Safety valve; 4. First connecting pipe; 5. Air valve; 6. First electric valve; 7. Second electric valve; 8. First pressure sensor; 9. Second pressure sensor; 10. Level gauge; 11. Second connecting pipe; 12. Water supply pipe.

[0044] This specification includes references to "one embodiment" or "implementation". The use of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. Specific features, structures, or characteristics may be combined in any suitable manner consistent with this disclosure.

[0045] The term "comprising" is open-ended. As used in the appended claims, it does not exclude additional structures or steps.

[0046] "First," "second," etc. As used in this article, these terms serve as labels for the nouns preceding them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.).

[0047] The term "based on," as used herein, describes one or more factors that influence the determination. This term does not exclude additional factors influencing the determination. That is, the determination may be based solely on these factors or at least partially on them. Consider the phrase "A is determined based on B." In this case, B is the factor influencing the determination of A, and such phrases do not exclude the possibility that the determination of A may also be based on C. In other instances, A may be determined solely on B. Detailed Implementation

[0048] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to specific embodiments.

[0049] Example 1:

[0050] Combination Figures 1 to 2 As shown, this embodiment is a water hammer protection device for a water supply pipeline, including a pressure tank 1, an air filling and venting assembly, a pressure regulating assembly, a detection assembly, and a control module. The pressure tank 1 is mounted on the water supply pipeline 12. The pressure tank 1 has an internal partition that divides the interior of the pressure tank 1 into an upper chamber for storing gas and a lower chamber for storing water. The lower chamber is connected to the water supply pipeline 12 via a second connecting pipe 11. An air filling and venting assembly is installed on the outer wall of the pressure tank 1, which can fill or vent the upper chamber. The two ends of the pressure regulating assembly are connected to the upper chamber and the lower chamber respectively, and the pressure regulating assembly can control the connection between the upper and lower chambers. Detection assemblies are installed in the upper and lower chambers, and the detection assemblies can detect the first pressure information of the gas in the upper chamber, the second pressure information of the water in the lower chamber, and the water level information in the lower chamber. The inflation / deflation assembly, pressure regulating assembly, and detection assembly are all connected to the control module. Based on the pressure difference between the first pressure information and the second pressure information, the control module starts the inflation / deflation assembly to regulate the pressure, so that the first pressure information and the second pressure information maintain a preset pressure difference value. The control module can also control the pressure regulating assembly to connect the upper chamber and the lower chamber to enhance the water hammer protection effect.

[0051] In some implementations, the pressure regulating assembly includes a first connecting pipe 4, an air valve 5, and a first electric valve 6. The first electric valve 6 is connected to the control module. The two ends of the first connecting pipe 4 are respectively connected to the upper chamber and the lower chamber. The air valve 5 and the first electric valve 6 are installed on the first connecting pipe 4, and the first electric valve 6 is arranged on the side of the first connecting pipe 4 closer to the lower chamber than the air valve 5. Specifically, in this embodiment, multiple pressure regulating assemblies are arranged circumferentially on the outer wall of the pressure tank 1, which can serve as backups for each other.

[0052] In some embodiments, the inflation / deflation assembly includes an air compressor and a second electric valve 7. The second electric valve 7 is installed on the outer wall of the upper chamber of the pressure tank 1 and connected to the air compressor. The air compressor and the second electric valve 7 are both connected to the control module. The air compressor can control the inflation of air into the upper chamber, and the second electric valve 7 can control the deflation of air from the upper chamber.

[0053] In some implementations, the detection assembly includes a first pressure sensor 8 and a second pressure sensor 9, with the first pressure sensor 8 located in the upper chamber and the second pressure sensor 9 located in the lower chamber.

[0054] In some implementations, the outer wall of the pressure tank 1 is also provided with a safety valve 3 that can connect to the upper chamber.

[0055] In some implementations, the separator is a plug 2, which has a downwardly convex spherical structure. The end of the first connecting pipe 4 that connects to the lower chamber is positioned as close as possible to the plug 2, so that the gas in the lower chamber of the tank can be discharged as much as possible without accumulating below the plug 2.

[0056] In some implementations, the detection component also includes a level gauge 10, which is capable of detecting water level information in the lower chamber.

[0057] In some implementations, the height of the upper chamber and the height of the lower chamber in pressure tank 1 satisfy the following relationship:

[0058]

[0059] Among them, H a H is the height of the upper chamber of the pressure tank. w P is the height of the lower chamber of the pressure tank. max H represents the maximum head of the water pump, ΔP is the preset pressure difference between the upper and lower chambers, and H is the maximum head of the water pump. d This is the lowest water level in the lower chamber.

[0060] Specifically, to ensure that gas inside the upper chamber of pressure tank 1 does not enter the lower chamber during normal operation, the gas pressure in the upper chamber is set to be 1m lower than the water pressure in the lower chamber. When the water pump is running at its maximum head, neglecting the hydraulic losses of the water supply pipe 12 between the pump and the tank, the water pressure in the lower chamber of the tank can be considered to be P. max , where P max For the maximum head of the water pump, the gas pressure in the upper chamber is (P). max -1). After the water pump loses power, the tank replenishes water to the water supply pipe 12. Gas expands in the upper chamber of the tank and enters the lower chamber through the air valve 5. After the gas has fully expanded, the water level in the tank drops to its minimum. To ensure that gas does not enter the water supply pipe 12, the minimum water level in the tank is set at 0.5m. According to the isothermal law of gases, we have...

[0061] H a (P max -1+P atm )=(H a +H w -0.5)P atm

[0062] Among them, H a H is the height of the upper part of the tank. w P is the height of the lower part of the tank. atm This refers to atmospheric pressure. In engineering, atmospheric pressure is often assumed to be equivalent to the pressure of 10 m of water column, i.e., P. atm =10, from which we can deduce that the height of the upper part of the tank and the height of the lower part satisfy the following relationship:

[0063]

[0064] In some implementations, the control module has two operating modes: normal mode and emergency mode. When the control module receives a switching signal, it switches from normal mode to emergency mode.

[0065] Furthermore, during normal operation, the control module is in normal mode to ensure that the gas pressure in the upper chamber is 1m lower than the water pressure in the lower chamber. In normal mode, the control module keeps the first electric valve 6 open and the second electric valve 7 closed. When the second pressure information continuously decreases or rises beyond a preset height within a preset time, the control module controls the inflation / deflation assembly to adjust the upper chamber to vent gas outward or inflate gas inward, maintaining a preset pressure difference between the first and second pressure information. Specifically, in this embodiment, when the second sensor detects a continuous and slow decrease in water pressure exceeding 1m, the second electric valve 7 is opened, the upper chamber of the tank vents gas outward, and the gas pressure detected by the first pressure sensor 8 decreases. When the gas pressure is 1m lower than the water pressure, the second electric valve 7 is closed. When the second sensor detects a continuous and slow increase in water pressure exceeding 1m, the air compressor is turned on to replenish gas to the upper chamber of the tank, and the gas pressure detected by the first pressure sensor 8 increases. When the gas pressure is 1m lower than the water pressure, the air compressor is turned off.

[0066] Furthermore, after the water pump loses power, the pressure inside the water supply pipe 12 drops rapidly. The tank replenishes water to the water supply pipe 12, causing the pressure in the lower chamber of the tank to decrease, falling below the air pressure in the upper chamber. The air valve 5 opens quickly, allowing high-pressure gas from the upper chamber of the tank to enter the lower chamber, effectively controlling the negative pressure in the water supply pipe 12. During this process, the water level in the tank drops rapidly. In this embodiment, the switching signal is that when the water level drops by more than 1 meter continuously within 20 seconds, the control module enters emergency mode.

[0067] Furthermore, in the emergency mode, when the water level in the current chamber drops to the lowest level or rises to the highest level, the control module can control the first electric valve 6 to close or open, and repeatedly adjust until the change range between the highest point water level and the adjacent lowest point water level is less than a preset range. Then, the control module opens the first electric valve 6 to end the emergency mode.

[0068] Specifically, emergency mode includes the following steps:

[0069] (1) Water is replenished into the water supply pipe 12 in the tank, and the water level continues to drop. As the air inside the tank expands, the air pressure gradually decreases. When the air pressure drops to its lowest point, the water level in the tank also drops to its lowest point. When the level gauge 10 detects that the water level in the lower chamber has dropped to its lowest point, the first electric valve 6 closes quickly.

[0070] (2) As the pressure in the water supply pipe 12 rises, the water in the water supply pipe 12 flows back, and the water level in the lower chamber gradually rises. If the first electric valve 6 is not closed, when the pressure in the water supply pipe 12 rises back to the head before the water pump was de-energized, the water level in the tank rises rapidly until it reaches the cap 2. The water level cannot continue to rise, so the pressure in the water supply pipe 12 cannot be regulated, and the maximum pressure in the water supply pipe 12 is difficult to control effectively.

[0071] Because the first electric valve 6 is closed in the first step, the gas in the lower chamber of the tank is trapped, forming an air cushion that hinders the rise of the water level in the lower chamber. When the air pressure reaches its maximum, the water level in the tank also rises to its highest point. When the level gauge 10 detects that the water level in the tank has risen to its highest point, the first electric valve 6 quickly opens; after the first electric valve 6 opens, the gas in the lower chamber of the tank can expand upward through the air valve 5, further reducing the gas pressure in the lower chamber of the tank and preventing the tank from being emptied due to excessive gas pressure in the lower part during the water level drop.

[0072] (3) Repeat the first and second steps above until the water level change between the highest point and the adjacent lowest point is less than 1m. The first electric valve 6 will open quickly and remain open, and the emergency mode will end.

[0073] like Figure 2 As shown, the water hammer protection effects of the air tank and the water hammer protection device in this embodiment are compared by using the hydraulic transition process calculation method. Both have a bottom elevation of 29.7m and a top elevation of 35m. The initial water level of pressure tank 1 is 34m; the elevation of the nozzle 2 of this device is also 34m, meaning the upper part of the tank is 1m high and the lower part is 4.3m high. It can be seen that after the water pump loses power, the water level drop process of both is basically the same, and the lowest water level is also basically the same at 30.27m, indicating that their protection effects against negative water hammer are basically the same. The highest water level of pressure tank 1 is 34.49m, while the highest water level of this device, adjusted in emergency mode, is 33.72m, lower than the highest water level of pressure tank 1.

[0074] The implementation principle of a water hammer protection device for a water supply pipeline is as follows:

[0075] This device uses a bulge 2 to separate water and air, avoiding the use of an airbag, reducing costs, and providing an aesthetically pleasing structure. The bulge 2 is designed as a downward-convex spherical surface, preventing gas from accumulating under it when venting from the lower chamber of the tank. Instead, the gas returns to the upper chamber of the tank via the first connecting pipe 4, further reducing gas solubility in water. Simultaneously, the air valve 5 is externally mounted on the tank for easy installation and replacement.

[0076] When the water level in the tank decreases, air valve 5 automatically opens to supply high-pressure gas to the lower chamber of the tank, preventing negative pressure from forming in the pipeline. When the water level in the tank rises, the electric valve connected in series with air valve 5 quickly closes, trapping gas to form an air cushion that hinders the rise in the water level in the tank, thus reducing the pressure rise in the water supply pipeline 12. At the same time, the above operating method can accelerate the attenuation of pressure fluctuations in the water supply pipeline 12, allowing the water supply system to stabilize quickly.

[0077] Example 2:

[0078] This embodiment is an operation method of a water hammer protection device for a water supply pipeline, applied to the water hammer protection device in Embodiment 1, wherein the control module has two operation modes: normal mode and emergency mode.

[0079] When the device is running in normal mode, the adjustment steps are as follows:

[0080] S1. Control the first electric valve to remain open and the second electric valve to remain closed;

[0081] S2. When the second sensor detects a continuous and slow decrease in water pressure exceeding 1m, open the second electric valve.

[0082] S3. When the gas pressure in the upper chamber is 1m lower than the water pressure in the lower chamber, close the second electric valve.

[0083] S4. When the second sensor detects that the water pressure has been rising slowly and continuously for more than 1m, turn on the air compressor.

[0084] S5. When the gas pressure in the upper chamber is 1m lower than the water pressure in the lower chamber, shut down the air compressor.

[0085] When the water level sensor detects that the water level drops by more than 1 meter continuously within 20 seconds, the control module switches from normal mode to emergency mode.

[0086] When the device is running in emergency mode, the adjustment steps are as follows:

[0087] B1. When the water level in the lower chamber of the tank drops to its lowest point, the first electric valve closes quickly.

[0088] B1.1 The electric valve closes quickly in 1 to 2 seconds.

[0089] B2. When the water level in the lower chamber of the tank rises to its highest point, the first electric valve opens rapidly.

[0090] B2.1 The electric valve opens rapidly in 1 to 2 seconds.

[0091] B3. Repeat steps B1 and B2 until the water level change between the highest point and the adjacent lowest point is less than 1m. Then, the first electric valve will open quickly and remain open, ending the emergency mode.

[0092] B3.1 The principle for judging the water level in the lower chamber of the tank to reach its highest point is: the water level measured by the level gauge gradually increases, while the rate of increase slows down until the rate of increase is zero; the principle for judging the water level in the lower chamber of the tank to reach its lowest point is: the water level measured by the level gauge gradually decreases, while the rate of decrease slows down until the rate of decrease is zero.

[0093] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A water hammer protection device for a water supply pipeline, characterized in that, include: Pressure tank (1) is installed on water supply pipe (12). The pressure tank (1) is equipped with a partition inside. The partition can divide the inside of the pressure tank (1) into an upper chamber for storing gas and a lower chamber for storing water. The lower chamber is connected to the water supply pipe (12). An inflation / deflation assembly is installed on the outer wall of the pressure tank (1), and the inflation / deflation assembly is capable of inflating or deflating the upper chamber; The pressure regulating component has two ends connected to the upper chamber and the lower chamber respectively, and can control the connection and disconnection between the upper chamber and the lower chamber; A detection component is disposed in the upper chamber and the lower chamber. The detection component is capable of detecting the first pressure information of the gas in the upper chamber, the second pressure information of the water in the lower chamber, and the water level information in the lower chamber. The control module is connected to the inflation / deflation assembly, the pressure regulating assembly, and the detection assembly. Based on the pressure difference between the first pressure information and the second pressure information, the control module starts the inflation / deflation assembly to regulate the pressure, so that the first pressure information and the second pressure information maintain a preset pressure difference. The control module can control the pressure regulating assembly to connect the upper chamber and the lower chamber to enhance the water hammer protection effect.

2. The water hammer protection device for a water supply pipeline according to claim 1, characterized in that: The pressure regulating assembly includes a first connecting pipe (4), an air valve (5) and a first electric valve (6). The first electric valve (6) is connected to the control module. The two ends of the first connecting pipe (4) are respectively connected to the upper chamber and the lower chamber. The air valve (5) and the first electric valve (6) are provided on the first connecting pipe (4).

3. A water hammer protection device for a water supply pipeline according to claim 2, characterized in that: The air filling and exhaust assembly includes an air compressor and a second electric valve (7). The second electric valve (7) and the air compressor are installed on the outer wall of the upper chamber of the pressure tank (1). The air compressor and the second electric valve (7) are both connected to the control module. The air compressor can control the filling of the upper chamber with air, and the second electric valve (7) can control the exhaust of the upper chamber with air.

4. A water hammer protection device for a water supply pipeline according to claim 3, characterized in that: The control module has two operating modes: normal mode and emergency mode. When the control module receives a switching signal, it switches from normal mode to emergency mode.

5. A water hammer protection device for a water supply pipeline according to claim 4, characterized in that: The normal mode is that the control module controls the second electric valve (7) or the air compressor to open. When the second pressure information continuously decreases or increases beyond the preset value within a preset time, the control module controls the inflation and deflation assembly to adjust the upper chamber to vent outward or inflate inward, so that the first pressure information and the second pressure information maintain a preset pressure difference value.

6. A water hammer protection device for a water supply pipeline according to claim 4, characterized in that: The switching signal is when the water level information drops rapidly within a preset time and exceeds a preset value. The emergency mode is when the water level information in the lower chamber drops to the lowest water level or rises to the highest water level, the control module can control the first electric valve (6) to close or open, and repeatedly adjust until the change range between the highest water level and the adjacent lowest water level is less than a preset range. The control module then opens the first electric valve (6) to end the emergency mode.

7. A water hammer protection device for a water supply pipeline according to claim 2, characterized in that: The separator is a plug (2), which has a convex spherical structure. The end of the first connecting pipe (4) that connects to the lower chamber is located near the plug (2).

8. A water hammer protection device for a water supply pipeline according to claim 1, characterized in that: The detection component includes a first pressure sensor (8), a second pressure sensor (9), and a level gauge (10). The first pressure sensor (8) is located in the upper chamber, and the second pressure sensor (9) and the level gauge (10) are located in the lower chamber. The first pressure sensor (8), the second pressure sensor (9), and the level gauge (10) are all connected to the control module. The first pressure sensor (8) can detect the first pressure information in the upper chamber, the second pressure sensor (9) can detect the second pressure information in the lower chamber, and the level gauge (10) can detect the water level information in the lower chamber.

9. A water hammer protection device for a water supply pipeline according to claim 1, characterized in that: The height of the upper chamber and the height of the lower chamber in the pressure tank (1) satisfy the following relationship: in, The height of the upper chamber of the pressure tank. The height of the lower chamber of the pressure tank. This is the maximum head of the water pump. The preset pressure difference between the upper and lower chambers This is the lowest water level in the lower chamber.

10. A water hammer protection device for a water supply pipeline according to claim 1, characterized in that: The outer wall of the pressure tank (1) is also provided with a safety valve (3) that can connect to the upper chamber, and the lower chamber is connected to the water supply pipe (12) via a second connecting pipe (11).

Images