A water pump control valve with downstream pipe burst emergency shutdown function

Abstract

The present invention relates to the field of valve technology, and proposes a water pump control valve with a downstream pipe burst emergency shutoff function, comprising a main valve body having a water inlet port and a water outlet port, the water pump control valve further comprising a control chamber, the control chamber comprising an upstream control chamber and a downstream control chamber; the water pump control valve further comprising a reset reversing valve and a shutoff reversing valve, the reset reversing valve comprising an upstream pressure collection end, a first downstream pressure collection end, a first reversing pressure collection end, and a discharge end, the shutoff reversing valve comprising an upstream pressure output end, a second downstream pressure collection end, a second reversing pressure collection end, and a downstream pressure output end, the reset reversing valve and the shutoff reversing valve selectively placing the control chamber in a dynamic adjustment state or a rapid shutoff state based on the pressures of the first reversing pressure collection end and the second reversing pressure collection end, respectively. The above technical solution solves the problem in the prior art that water pump control valves cannot meet the rapid shutoff requirements in emergency situations.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, and in particular to a water pump control valve with a downstream pipe burst emergency shut-off function. Background Art

[0002] A pump control valve is a device used to control the operation of a water pump. It is typically installed on the pump's inlet and outlet pipes to regulate and control water flow and pressure. A pump control valve is a multifunctional valve that uses a pilot-operated flow control mechanism. It is suitable for use in water distribution pipes where flow and pressure control is required. It maintains a predetermined flow rate, limits excess flow to a predetermined value, and appropriately reduces upstream high pressure. Even if pressure changes upstream of the main valve, flow downstream of the main valve remains unchanged.

[0003] However, the existing water pump control valve often only plays the role of controlling flow and pressure. When an emergency occurs and a quick response is required to close the valve, the existing water pump control valve often does not close in time and continues to drain water, or responds with a delay, and can only be shut down after a period of drainage after the emergency occurs. The existing water pump control valve cannot meet the technical requirements of quick shutdown in an emergency. Therefore, a new water pump control valve structure is urgently needed to deal with the above situation. Summary of the Invention

[0004] The present invention provides a water pump control valve with a downstream pipe burst emergency shut-off function, which solves the problem in the prior art that water pump control valves cannot meet the rapid shut-off requirements in emergency situations.

[0005] The technical solutions of the present invention are as follows:

[0006] A water pump control valve with a downstream pipe burst emergency shutoff function, the water pump control valve comprising a main valve body having a water inlet port and a water outlet port, the water pump control valve further comprising a control chamber, the control chamber comprising an upstream control chamber and a downstream control chamber;

[0007] The water pump control valve also includes a reset reversing valve and a shut-off reversing valve. The reset reversing valve includes an upstream pressure collecting end, a first downstream pressure collecting end, a first reversing pressure collecting end and a discharge end. The shut-off reversing valve includes an upstream pressure output end, a second downstream pressure collecting end, a second reversing pressure collecting end and a downstream pressure output end. The upstream pressure collecting end is communicated with the water inlet port, the first downstream pressure collecting end, the second downstream pressure collecting end, the first reversing pressure collecting end and the second reversing pressure collecting end are all communicated with the water outlet port, and the upstream pressure output end is communicated with the upstream control chamber. , the downstream pressure output end is connected to the downstream control chamber, and the reset reversing valve and the shut-off reversing valve are connected. The reset reversing valve and the shut-off reversing valve selectively put the control chamber into a dynamic adjustment state or a fast shut-off state according to the pressure of the first reversing pressure collection end and the second reversing pressure collection end respectively, wherein the dynamic adjustment state is that the upstream control chamber is connected to the water inlet port and the downstream control chamber is connected to the water outlet port; the fast shut-off state is that the upstream control chamber is connected to the discharge end and the downstream control chamber is connected to the water inlet port.

[0008] The water pump control valve also includes a control diaphragm, a main valve plug assembly, and a main spring. The control diaphragm is arranged in the control cavity to form the upstream control cavity and the downstream control cavity. The main valve plug assembly is connected to the control diaphragm. The control diaphragm deforms to drive the main valve plug assembly to close or conduct the main valve body. The main spring is arranged on the main valve plug assembly so that the main valve plug assembly has a tendency to close the main valve body.

[0009] The main valve plug assembly includes a valve stem and a valve plate. One end of the valve stem is connected to the control diaphragm, and the other end is connected to the valve plate. The valve plate is used to shut off the main valve body. The main spring is sleeved on the valve stem. One end of the main spring acts on the valve plate, and the other end acts on the outer wall of the upstream control chamber.

[0010] The water pump control valve further includes a regulating needle valve, which is arranged between the upstream pressure output end and the upstream control chamber.

[0011] The reset reversing valve includes a reset valve housing, a reset valve core, a reset button and a reset spring, wherein the reset valve core is a stepped valve core, and a sealing ring is provided at the steps of the reset valve core. A stepped channel is provided in the reset valve housing, and the reset valve core selectively moves in the stepped channel in the reset valve housing according to the pressure of the first reversing pressure collecting end. The reset button is provided on the reset valve housing and is located on the opposite side of the first reversing pressure collecting end. The reset spring is sleeved on the reset button and is located between the reset button and the outer wall of the reset valve housing.

[0012] The shut-off reversing valve includes a shut-off valve housing, a shut-off valve core and a shut-off spring. The shut-off valve core is a stepped valve core. Sealing rings are provided at the steps of the shut-off valve core. A stepped channel is provided in the shut-off valve housing. One end of the shut-off valve core is close to the second reversing pressure collection end, and the other end is provided with the shut-off spring. The shut-off valve core selectively moves in the shut-off valve housing according to the force of the second reversing pressure collection end and the shut-off spring.

[0013] The shut-off reversing valve further includes an adjusting screw, which is arranged on the shut-off valve housing close to one end of the shut-off spring, and one end of the adjusting screw abuts against the shut-off spring.

[0014] Ports 1 to 8 are provided on the reset valve housing, and the reset valve core has two stroke positions in the reset valve housing, wherein in the first stroke position, the port 1 is connected to the port 2, and the port 6 is connected to the port 7; in the second stroke position, the port 3 is connected to the port 2, and the port 5 is connected to the port 4, the port 8 is set as the first reversing pressure collection end, the port 1 and the port 5 are connected in parallel and set as the upstream pressure collection end, the port 6 is set as the first downstream pressure collection end, and the port 3 is set as the discharge end;

[0015] The shut-off valve housing is provided with interfaces 1 to 9, and the shut-off valve core has two stroke positions in the shut-off valve housing, wherein in the first stroke position, the interface 1 is connected to the interface 2, the interface 4 is connected to the interface 5, and the interface 6 is connected to the interface 7; in the second stroke position, the interface 3 is connected to the interface 2, the interface 7 is connected to the interface 8, the interface 9 is set as the second reversing pressure collection end, the interface 2 is set as the upstream pressure output end, the interface 5 and the interface 7 are connected in parallel and are set as the downstream pressure output end, and the interface 8 is set as the second downstream pressure collection end;

[0016] The port 2 is connected to the interface 1, the interface 3 is connected to the interface 4 in parallel and then connected to the port 4, and the port 7 is connected to the interface 6.

[0017] The working principle and beneficial effects of the present invention are:

[0018] The present invention discloses a water pump control valve with a downstream pipe burst emergency shut-off function, the structure of which is to arrange a reset reversing valve and a shut-off reversing valve on the main valve body, and then use the various pressure collection ends and output ends on the reset reversing valve and the shut-off reversing valve, and use the pressure changes at the water inlet port and the water outlet port to switch different connection states, thereby putting the main valve body in different connection states, and putting the main valve body in a dynamic adjustment state and a fast shut-off state. In the dynamic adjustment state, the main valve body dynamically adjusts the opening by the pressure difference between the water inlet port and the water outlet port, controls the flow, and ensures normal operation of the water supply; when an emergency occurs, the water inlet port and the downstream control chamber are connected, and the upstream control chamber discharge end is connected, so that the upstream control chamber is quickly emptied from the discharge end by means of the pressure of the water inlet port, thereby achieving fast shut-off, timely responding to the occurrence of emergency, avoiding further losses, and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a structural diagram of the water pump control valve in the initial state of the present invention;

[0021] Figure 2 yes Figure 1 The partial enlarged view at A in the middle shows the communication state of the reset reversing valve and the shut-off reversing valve in the initial state;

[0022] Figure 3 This is a structural diagram of the dynamic adjustment state of the water pump control valve in the present invention;

[0023] Figure 4 yes Figure 3 The partial enlarged view at point B in the middle shows the communication state between the reset reversing valve and the shut-off reversing valve when the main valve body is in the dynamic adjustment state;

[0024] Figure 5 This is a structural diagram of the water pump control valve in the fast shut-off state of the present invention;

[0025] Figure 6 yes Figure 5 The partial enlarged view at point C in the middle shows the communication state between the reset reversing valve and the shut-off reversing valve when the main valve body is in the fast shut-off state;

[0026] In the figure: 1. Water inlet port, 2. Water outlet port, 3. Main valve body, 4. Upstream control chamber, 5. Downstream control chamber, 6. Reset reversing valve, 7. Shut-off reversing valve, 8. Control diaphragm, 9. Main spring, 10. Valve stem, 11. Valve plate, 12. Adjusting needle valve, 13. Reset valve housing, 14. Reset valve core, 15. Reset button, 16. Reset spring, 17. Shut-off valve housing, 18. Shut-off valve core, 19. Shut-off spring, 20. Adjusting screw, 21. Port one, 22. Port eight, 23. Port two, 24. Port six, 25. Port seven, 26. Port three, 27. Port five, 28. Port four, 29. Interface one, 30. Interface nine, 31. Interface two, 32. Interface four, 33. Interface five, 34. Interface six, 35. Interface seven, 36. Interface three, 37. Interface eight. DETAILED DESCRIPTION

[0027] 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 embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0028] like Figures 1 to 6 As shown, this embodiment provides a water pump control valve with a downstream pipe burst emergency shutdown function, the water pump control valve includes a main valve body 3 having a water inlet port 1 and a water outlet port 2, the water pump control valve also includes a control chamber, the control chamber includes an upstream control chamber 4 and a downstream control chamber 5;

[0029] The water pump control valve also includes a reset reversing valve 6 and a shut-off reversing valve 7. The reset reversing valve 6 includes an upstream pressure collecting end, a first downstream pressure collecting end, a first reversing pressure collecting end and a discharge end. The shut-off reversing valve 7 includes an upstream pressure output end, a second downstream pressure collecting end, a second reversing pressure collecting end and a downstream pressure output end. The upstream pressure collecting end is connected to the water inlet port 1, the first downstream pressure collecting end, the second downstream pressure collecting end, the first reversing pressure collecting end and the second reversing pressure collecting end are all connected to the water outlet port 2, the upstream pressure output end is connected to the upstream control chamber 4, and the The downstream pressure output end is connected to the downstream control chamber 5, and the reset reversing valve 6 and the shut-off reversing valve 7 are connected. The reset reversing valve 6 and the shut-off reversing valve 7 selectively put the control chamber into a dynamic adjustment state or a quick shut-off state according to the pressure of the first reversing pressure acquisition end and the second reversing pressure acquisition end, respectively. The dynamic adjustment state is that the upstream control chamber 4 is connected to the water inlet port 1, and the downstream control chamber 5 is connected to the water outlet port 2; the quick shut-off state is that the upstream control chamber 4 is connected to the discharge end, and the downstream control chamber 5 is connected to the water inlet port 1.

[0030] In this embodiment, the water pump control valve with a downstream pipe burst emergency shut-off function gradually opens the main valve body 3 channel based on the water pressure at the front end of the main valve body 3 and the water pressure changes at the rear end of the main valve body 3 during initial operation. When the water pressure at the rear end rises, it enters a dynamic adjustment state to control the flow of the valve body. When an emergency occurs at the downstream end, such as a downstream water pipe burst, the main valve body 3 switches its operating state to a quick shut-off state. In particular, when the main valve body 3 in this application is shut off, the upstream control chamber 4 will switch to connect to the discharge end, and the downstream control chamber 5 will switch to connect to the water inlet port 1. The relatively large upstream water pressure is used to quickly shut down the main valve body 3, with a fast response and a quick and tight shut-off, thereby improving the safety of the water pump control valve.

[0031] Based on the above technical concept, in one possible embodiment, specifically, the water pump control valve is composed of at least a main valve body 3, a reset reversing valve 6 and a shut-off reversing valve 7, wherein a control chamber, a water inlet port 1 and a water outlet port 2 are provided in the main valve body 3, and the control chamber is divided into an upstream control chamber 4 and a downstream control chamber 5. The volume of the upstream control chamber 4 and the downstream control chamber 5 changes according to the pressure of the connected medium. When the pressure of the upstream control chamber 4 is greater than the pressure of the downstream control chamber 5, the upstream control chamber 4 increases and the downstream control chamber 5 decreases, controlling the main valve body 3 to change in a trend toward opening the channel. On the contrary, when the pressure of the upstream control chamber 4 is less than the pressure of the downstream control chamber 5, the upstream control chamber 4 decreases and the downstream control chamber 5 increases, controlling the main valve body 3 to change in a trend toward shutting off the channel.

[0032] The reset reversing valve 6 and the shut-off control valve are connected to each other, and multiple communication channels can be set, and the on-off of the communication channels can be switched. The reset reversing valve 6 is provided with an upstream pressure collecting end, a first downstream pressure collecting end, a first reversing pressure collecting end and a discharge end. The upstream pressure collecting end is connected to the water inlet port 1, and the first downstream pressure collecting end and the first reversing pressure collecting end are both connected to the water outlet port 2. The discharge end is an open port connected to the outside world. The shut-off reversing valve 7 is provided with an upstream pressure output end, a second downstream pressure collecting end, a second reversing pressure collecting end and a downstream pressure output end. The upstream pressure output end is connected to the upstream control chamber 4, and the downstream pressure output end is connected to the downstream control chamber 5. The second downstream pressure collecting end and the second reversing pressure collecting end are both connected to the water outlet port 2. The reset reversing valve 6 and the shut-off reversing valve 7 can adjust the connection state between different ports, thereby combining different connection schemes to realize different working states of the main valve body 3. When the main valve body 3 is in normal operation, the water inlet port 1 passes through the upstream pressure collecting end, the reset reversing valve in sequence. 6. The shut-off reversing valve 7 and the upstream pressure output end are connected to the upstream control chamber 4, and the water outlet port 2 is connected to the downstream control chamber 5 in sequence through the second downstream pressure collection end and the downstream pressure output end. At this time, the upstream control chamber 4 and the downstream control chamber 5 can be dynamically adjusted according to the pressure before and after the main valve body 3, thereby controlling the flow rate. The main valve body 3 is now in a dynamic adjustment state. When an emergency occurs at the rear end of the main valve body 3, such as a pipe burst, the shut-off reversing valve 7 will adjust the connection state again, thereby switching the working state of the main valve body 3. At this time, the water inlet port 1 is connected to the downstream control chamber 5 in sequence through the upstream pressure collection end, the reset reversing valve 6, the shut-off reversing valve 7, and the downstream pressure output end. The upstream control chamber 4 is connected to the downstream control chamber 5 in sequence through the upstream pressure output end, the shut-off reversing valve 7, the reset reversing valve 6, and the drain end. Due to the high pressure of the water inlet port 1, it acts on the downstream control chamber 5, quickly pressing the water in the upstream control chamber 4 to the drain end, thereby rapidly increasing the pressure in the downstream control chamber 5, closing the main valve body 3, and the main valve body 3 is in a rapid shut-off state.

[0033] The water pump control valve also includes a control diaphragm 8, a main valve plug assembly, and a main spring 9. The control diaphragm 8 is arranged in the control chamber to form the upstream control chamber 4 and the downstream control chamber 5. The main valve plug assembly is connected to the control diaphragm 8. The control diaphragm 8 deforms to drive the main valve plug assembly to close or conduct the main valve body 3. The main spring 9 is arranged on the main valve plug assembly so that the main valve plug assembly has a tendency to close the main valve body 3.

[0034] The main valve plug assembly includes a valve stem 10 and a valve plate 11. One end of the valve stem 10 is connected to the control diaphragm 8, and the other end is connected to the valve plate 11. The valve plate 11 is used to shut off the main valve body 3. The main spring 9 is sleeved on the valve stem 10. One end of the main spring 9 acts on the valve plate 11, and the other end acts on the outer wall of the upstream control chamber 4.

[0035] On the basis of the above embodiment, the main valve body 3 is further provided with specific components for shutting off the main valve body 3. Specifically, a control diaphragm 8 is arranged in the control chamber to form an upstream control chamber 4 and a downstream control chamber 5. The control diaphragm 8 is made of deformable material and deforms with the pressure of the upstream control chamber 4 and the downstream control chamber 5. A valve stem 10 is arranged on the control diaphragm 8. One end of the valve stem 10 extends out of the upstream control chamber 4. A valve plate 11 is provided at the end of the extended part. A main spring 9 is sleeved on the valve stem 10. The main spring 9 acts on the valve plate 11. The valve stem 10 and the valve plate 11 together form a main valve plug assembly. The main spring 9 applies elastic force to the valve plate 11, so that it has a tendency to shut off the main valve body 3. When the medium pressure in the upstream control chamber 4 is greater than the elastic force of the main spring 9, the valve plate 11 opens and the main valve body 3 is connected.

[0036] The water pump control valve further includes a regulating needle valve 12 , which is disposed between the upstream pressure output end and the upstream control chamber 4 .

[0037] On the basis of the above embodiment, a regulating needle valve 12 is provided between the upstream pressure output end and the upstream control chamber 4 . The regulating needle valve 12 can adjust the opening to control the flow rate from the downstream pressure output end to the upstream control chamber 4 .

[0038] The reset reversing valve 6 includes a reset valve housing 13, a reset valve core 14, a reset button 15 and a reset spring 16, wherein the reset valve core 14 is a stepped valve core, and a sealing ring is provided at the steps of the reset valve core 14. A stepped channel is provided in the reset valve housing 13, and the reset valve core 14 selectively moves in the stepped channel in the reset valve housing 13 according to the pressure of the first reversing pressure collecting end. The reset button 15 is provided on the reset valve housing 13 and is located on the opposite side of the first reversing pressure collecting end. The reset spring 16 is sleeved on the reset button 15, and the reset spring 16 is located between the reset button 15 and the outer wall of the reset valve housing 13.

[0039] On the basis of the above embodiment, the reset reversing valve 6 specifically opens a multi-step channel in the reset valve housing 13, and the reset valve core 14 can move in the reset valve housing 13. The reset valve core 14 also adopts a stepped structure. A sealing ring is installed at the stepped position on the reset valve core 14, which abuts against the channel step in the reset valve housing 13 to achieve local sealing of the stepped part, so that the reset reversing valve 6 can switch to different communication states. When the reset valve core 14 needs to be reset, a reset button 15 is provided at one end of the reset valve housing 13. Pressing the reset button 15 will push the reset valve core 14 back to its initial position. The reset button 15 bounces back under the action of the reset spring 16 without affecting the further movement of the reset valve core 14.

[0040] The shut-off reversing valve 7 includes a shut-off valve housing 17, a shut-off valve core 18 and a shut-off spring 19. The shut-off valve core 18 is a stepped valve core. Sealing rings are provided at the steps of the shut-off valve core 18. A stepped channel is provided in the shut-off valve housing 17. One end of the shut-off valve core 18 is close to the second reversing pressure collection end, and the other end is provided with the shut-off spring 19. The shut-off valve core 18 selectively moves in the shut-off valve housing 17 according to the force of the second reversing pressure collection end and the shut-off spring 19.

[0041] The shut-off reversing valve 7 further includes an adjusting screw 20 . The adjusting screw 20 is disposed on the shut-off valve housing 17 at one end close to the shut-off spring 19 , and one end of the adjusting screw 20 abuts against the shut-off spring 19 .

[0042] On the basis of the above embodiment 1, the structure of the shut-off reversing valve 7 is specifically, a multi-step channel is opened in the shut-off valve housing 17, the shut-off valve core 18 can move in the channel in the shut-off valve housing 17, the shut-off valve core 18 also adopts a stepped structure, and a sealing ring is provided at the step position on the shut-off valve core 18, which abuts against the channel step in the shut-off valve housing 17 to realize local sealing of the stepped part, so that the shut-off valve core 18 can switch different connection states by movement, and a shut-off spring 19 is provided in the shut-off valve housing 17. The shut-off spring 19 is on the opposite side of the second reversing pressure collecting end. The shut-off spring 19 makes the shut-off valve core 18 have a tendency to move close to the second reversing pressure collecting end. When the pressure at the second reversing pressure collecting end is greater than the elastic force of the shut-off spring 19, the shut-off valve core 18 moves, thereby switching the connection state.

[0043] Furthermore, an adjusting screw 20 is provided on the shut-off valve housing 17, and one end of the adjusting screw 20 in the shut-off valve housing 17 abuts against the spring. The length of the adjusting screw 20 screwed into the shut-off valve housing 17 is adjusted by rotation, thereby adjusting the compression force of the shut-off spring 19, thereby adapting to the second reversing pressure collection end of different pressure values, thereby improving wide applicability.

[0044] The reset valve housing 13 is provided with ports 1 to 8, 22. The reset valve core 14 has two stroke positions in the reset valve housing 13. In the first stroke position, the port 1 21 is connected to the port 2 23, and the port 6 24 is connected to the port 7 25. In the second stroke position, the port 3 26 is connected to the port 2 23, and the port 5 27 is connected to the port 4 28. The port 8 22 is set as the first reversing pressure collection end, the port 1 21 and the port 5 27 are connected in parallel and set as the upstream pressure collection end, the port 6 24 is set as the first downstream pressure collection end, and the port 3 26 is set as the discharge end.

[0045] The shut-off valve housing 17 is provided with interfaces 1 to 9, 30. The shut-off valve core 18 has two stroke positions in the shut-off valve housing 17. In the first stroke position, the interface 1 29 is connected to the interface 2 31, the interface 4 32 is connected to the interface 5 33, and the interface 6 34 is connected to the interface 7 35. In the second stroke position, the interface 36 is connected to the interface 2 31, and the interface 7 35 is connected to the interface 8 37. The interface 9 30 is set as the second reversing pressure collection end, the interface 2 31 is set as the upstream pressure output end, the interface 5 33 and the interface 7 35 are connected in parallel and set as the downstream pressure output end, and the interface 8 37 is set as the second downstream pressure collection end.

[0046] The port 2 23 is connected to the interface 1 29 , the interface 3 36 and the interface 4 32 are connected in parallel to the port 4 28 , and the port 7 25 is connected to the interface 6 34 .

[0047] On the basis of the above embodiments, one of the specific connection structures of the reset reversing valve 6 and the shut-off reversing valve 7 may be implemented. Specifically, port one 21 to port eight 22 are provided on the reset valve housing 13, and interface one 29 to interface nine 30 are provided on the shut-off valve housing 17. In the initial state of the water pump control valve, the valve core of the reset reversing valve 6 is located on the side close to the first reversing pressure collecting end, and the valve core of the shut-off reversing valve 7 is located on the side close to the second reversing pressure collecting end. At this time, the reset valve core 14 and the shut-off valve core 18 are located in their respective first stroke positions. When they are respectively away from the first reversing pressure collecting end and the second reversing pressure collecting end, that is, away from port eight 22 and interface nine 30, respectively, the reset valve core 14 and the shut-off valve core 18 are located in their respective second stroke positions. In this embodiment, the reset valve core 14 is close to port eight 22, and the shut-off valve core 18 is close to interface nine 30. When water flows through water inlet port 1, it flows through the pipeline to port 1 21 and port 5 27. Port 5 27 is blocked, so water flows sequentially through port 1 21, port 2 23, port 1 29, port 2 31, and regulating needle valve 12 into upstream control chamber 4. The water pressure in upstream control chamber 4 increases, while downstream control chamber 5 is connected to port 5 33 and port 7 35 via a pipeline. Port 5 33 is blocked, and downstream control chamber 5 is connected sequentially through port 7 35, port 6 34, port 7 25, and port 6 24 to water outlet port 2. The water pressure in water outlet port 2 is zero. At this point, the water pressure in upstream control chamber 4 overcomes the elastic force of main spring 9, and valve plate 11 in main valve body 3 opens to achieve communication, allowing water to enter water outlet port 2. The above describes the process from the initial state to the open state.

[0048] As the main valve body 3 opens, the water pressure at the water outlet port 2 rises, and the water pressure at the water outlet port 2 collected by the first reversing pressure collecting end and the second reversing pressure collecting end increases. The water pressure acts on the reset valve core 14 and the shut-off valve core 18 through the port eight 22 and the interface nine 30, respectively, causing them to move from the first stroke position to the second stroke position, respectively, switching the connection state. At this time, the water inlet port 1 is connected to the upstream control chamber 4 via the port five 27, the port four 28, the interface three 36, the interface two 31, and the regulating needle valve 12 in sequence, while the water outlet port 2 is connected to the downstream control chamber 5 via the interface eight 37 and the interface seven 35 in sequence. At this time, the water pressures of the water inlet port 1 and the water outlet port 2 are respectively on both sides of the control diaphragm 8, and the main valve body 3 enters a dynamically regulated working state.

[0049] When an emergency occurs on one side of the water outlet port 2, such as a pipe burst, the flow rate at the water outlet port 2 increases rapidly. Due to the principle of water flow injection, the first reversing pressure collection end and the second reversing pressure collection end generate a negative pressure due to the rapid flow of water, thereby reducing the water pressure at the port eight 22 and the interface nine 30 to zero. At this time, the reset valve core 14 of the reset reversing valve 6 has no moving power and remains in its original position, while the shut-off valve core 18 of the shut-off reversing valve 7 moves under the action of the shut-off spring 19 and returns to the first stroke position. At this time, the inlet The water port 1 is connected to the downstream control chamber 5 via port five 27, port four 28, interface four 32, and interface five 33 in sequence, while the upstream control chamber 4 is connected to the outside world via the regulating needle valve 12, interface two 31, interface one 29, port two 23, and port three 26 in sequence, that is, connected to the discharge end. Since the water pressure at the water inlet port 1 is still relatively large, the downstream control chamber 5 applies pressure to the control diaphragm 8 under the action of the water pressure, forcing the water in the upstream control chamber 4 to be rapidly discharged through the discharge end, achieving rapid shutdown, and the main valve body 3 enters the rapid shutdown state.

[0050] When the fault is eliminated, it is only necessary to press the reset button 15 of the reset reversing valve 6 to restore the reset valve core 14 to the first stroke position, at which time water can be restored.

[0051] It should be noted that the ports and interfaces opened by the above-mentioned reset reversing valve 6 and the shut-off reversing valve 7 are only one possible connection method. Other connection schemes based on the technical concept of this application that can achieve the same rapid shut-off should also fall within the scope of protection of this application.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A water pump control valve with a downstream pipe burst emergency shut-off function, characterized in that: The water pump control valve includes a main valve body having a water inlet port and a water outlet port, and the water pump control valve also includes a control chamber, and the control chamber includes an upstream control chamber and a downstream control chamber; The water pump control valve also includes a reset reversing valve and a shut-off reversing valve. The reset reversing valve includes an upstream pressure collecting end, a first downstream pressure collecting end, a first reversing pressure collecting end and a discharge end. The shut-off reversing valve includes an upstream pressure output end, a second downstream pressure collecting end, a second reversing pressure collecting end and a downstream pressure output end. The upstream pressure collecting end is communicated with the water inlet port, the first downstream pressure collecting end, the second downstream pressure collecting end, the first reversing pressure collecting end and the second reversing pressure collecting end are all communicated with the water outlet port, and the upstream pressure output end is communicated with the upstream control chamber. , the downstream pressure output end is communicated with the downstream control chamber, the reset reversing valve and the shut-off reversing valve are communicated with each other, and the reset reversing valve and the shut-off reversing valve selectively put the control chamber into a dynamic adjustment state or a fast shut-off state according to the pressure of the first reversing pressure collecting end and the second reversing pressure collecting end, respectively, wherein the dynamic adjustment state is that the upstream control chamber is communicated with the water inlet port and the downstream control chamber is communicated with the water outlet port; the fast shut-off state is that the upstream control chamber is communicated with the drain end and the downstream control chamber is communicated with the water inlet port; The reset reversing valve includes a reset valve housing, a reset valve core, a reset button, and a reset spring, wherein the reset valve core is a stepped valve core, and a sealing ring is provided at each step of the reset valve core. A stepped channel is provided in the reset valve housing, and the reset valve core selectively moves in the stepped channel in the reset valve housing according to the pressure of the first reversing pressure collection end. The reset button is provided on the reset valve housing and is located on the opposite side of the first reversing pressure collection end. The reset spring is sleeved on the reset button and is located between the reset button and the outer wall of the reset valve housing. The shut-off reversing valve includes a shut-off valve housing, a shut-off valve core, and a shut-off spring. The shut-off valve core is a stepped valve core, and sealing rings are provided at the steps of the shut-off valve core. A stepped passage is provided in the shut-off valve housing. One end of the shut-off valve core is close to the second reversing pressure collection end, and the other end is provided with the shut-off spring. The shut-off valve core selectively moves in the shut-off valve housing according to the force of the second reversing pressure collection end and the shut-off spring. Ports 1 to 8 are provided on the reset valve housing, and the reset valve core has two stroke positions in the reset valve housing, wherein in the first stroke position, the port 1 is connected to the port 2, and the port 6 is connected to the port 7; in the second stroke position, the port 3 is connected to the port 2, and the port 5 is connected to the port 4, the port 8 is set as the first reversing pressure collection end, the port 1 and the port 5 are connected in parallel and set as the upstream pressure collection end, the port 6 is set as the first downstream pressure collection end, and the port 3 is set as the discharge end; The shut-off valve housing is provided with interfaces 1 to 9, and the shut-off valve core has two stroke positions in the shut-off valve housing, wherein in the first stroke position, the interface 1 is connected to the interface 2, the interface 4 is connected to the interface 5, and the interface 6 is connected to the interface 7; in the second stroke position, the interface 3 is connected to the interface 2, the interface 7 is connected to the interface 8, the interface 9 is set as the second reversing pressure collection end, the interface 2 is set as the upstream pressure output end, the interface 5 and the interface 7 are connected in parallel and are set as the downstream pressure output end, and the interface 8 is set as the second downstream pressure collection end; The port 2 is connected to the interface 1, the interface 3 is connected to the interface 4 in parallel and then connected to the port 4, and the port 7 is connected to the interface 6.

2. The water pump control valve with downstream pipe burst emergency shutoff function according to claim 1, characterized in that: The water pump control valve also includes a control diaphragm, a main valve plug assembly, and a main spring. The control diaphragm is arranged in the control cavity to form the upstream control cavity and the downstream control cavity. The main valve plug assembly is connected to the control diaphragm. The control diaphragm deforms to drive the main valve plug assembly to close or conduct the main valve body. The main spring is arranged on the main valve plug assembly so that the main valve plug assembly has a tendency to close the main valve body.

3. The water pump control valve with downstream pipe burst emergency shutdown function according to claim 2, characterized in that: The main valve plug assembly includes a valve stem and a valve plate. One end of the valve stem is connected to the control diaphragm, and the other end is connected to the valve plate. The valve plate is used to shut off the main valve body. The main spring is sleeved on the valve stem. One end of the main spring acts on the valve plate, and the other end acts on the outer wall of the upstream control chamber.

4. The water pump control valve with downstream pipe burst emergency shutoff function according to claim 1 or 3, characterized in that: The water pump control valve further includes a regulating needle valve, which is arranged between the upstream pressure output end and the upstream control chamber.

5. The water pump control valve with downstream pipe burst emergency shutoff function according to claim 4, characterized in that: The shut-off reversing valve further includes an adjusting screw, which is arranged on the shut-off valve housing close to one end of the shut-off spring, and one end of the adjusting screw abuts against the shut-off spring.

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