Water pressure relief structure of water pump

Abstract

The utility model discloses a water pump water pressure relief structure which comprises a water inlet and outlet piece, a valve plate structure, a pressure relief opening and closing piece arranged between the water inlet and outlet piece and the valve plate structure, a water pumping piece and a protective cover connected with the valve plate structure, the water pumping piece is arranged between the valve plate structure and the protective cover, and a power supporting structure is arranged at the bottom end of the protective cover. The water inlet and outlet piece comprises a sealing plate, a water inlet and a water outlet, the water pumping piece comprises a connecting plate and a plurality of leather cups which are arranged on the connecting plate and used for generating pressure difference; the valve plate structure is provided with a water inlet on-off structure used for controlling communication of the water inlet and the water pumping part, a water outlet on-off structure used for controlling communication of the water outlet and the water pumping part, and a pressure relief on-off structure communicated with the water outlet on-off structure and the water inlet on-off structure. The scheme has the beneficial effects that according to the description of the scheme, the structure is simple, the design is reasonable, when the water outlet is closed irregularly, the operation of the water pumping piece is not stopped, and the pressure in the water pump is not too high.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, in particular to a water pressure relief structure of a water pump. Background Art

[0002] In pressurized pipelines, sudden changes in water flow velocity due to external factors (such as the sudden closure of a valve or the sudden shutdown of a pump unit) can cause water hammer, a hydraulic phenomenon known as water hammer. Rapid changes in water velocity caused by starting and stopping a pump or opening and closing a gate valve too quickly, especially sudden pump shutdowns, can damage pipes, pumps, and valves, cause pump reversals, and reduce pipe network pressure. For example, in smart toilets, excessive water pressure often causes the connecting pipes to stretch and leak, necessitating pump pressure relief. Existing technologies typically combine a pump and a pressure relief valve to achieve this, but such integrated equipment is costly, bulky, and inefficient.

[0003] Therefore, this solution proposes a water pump water pressure relief structure to solve the technical problem of how to efficiently and quickly reduce the water pressure of the water pump when the water pressure of the smart toilet is too high. Utility Model Content

[0004] The utility model addresses the deficiencies in the prior art and provides a water pump water pressure relief structure with a simple structure and reasonable design, which achieves the goal of water pressure relief through the structure of the pump itself. When the water outlet is closed at irregular intervals, the operation of the pumping part is not stopped, and excessive pressure in the water pump is not caused. The utility model can be widely used in smart toilets.

[0005] In order to achieve the above-mentioned object, the utility model provides a water pressure relief structure of a water pump, comprising a water inlet and outlet member, a valve plate structure, a pressure relief opening and closing member arranged between the water inlet and outlet member and the valve plate structure, a water pumping member, and a protective cover connected to the valve plate structure, wherein the water pumping member is arranged between the valve plate structure and the protective cover, and a power support structure is provided at the bottom end of the protective cover;

[0006] The water inlet and outlet parts include a closing plate, a water inlet and a water outlet connected to the closing plate at one end;

[0007] The pumping member comprises a connecting plate, a plurality of leather cups arranged around the center of the connecting plate and used for generating a pressure difference, and an electric push rod connected to the plurality of leather cups through a pushing plate.

[0008] The valve plate structure is provided with a water inlet opening and closing structure for controlling the communication between the water inlet and the leather bowl, a water outlet opening and closing structure for controlling the communication between the water outlet and the leather bowl, and a pressure relief opening and closing structure connected with the water outlet opening and closing structure and the water inlet opening and closing structure;

[0009] It should be noted that a sealing ring 1 is set between the water inlet and outlet parts and the pressure relief opening and closing parts, a sealing ring 2 is also set between the valve plate structure and the pressure relief opening and closing parts, and a sealing ring 3 is set between the water pumping parts and the valve plate structure; sealing ring 1, sealing ring 2 and sealing ring 3 are determined according to the actual area that needs to be sealed, and are controlled by technical personnel in this field according to actual production conditions, and will not be described in detail here.

[0010] Furthermore, the water outlet opening and closing structure includes a central groove provided in the center of the valve plate structure, the central groove is located on a side of the valve plate structure away from the water pumping member, and the water outlet is connected to the leather cup through the water outlet opening and closing structure;

[0011] Three groups of water outlet holes are provided at the bottom of the central groove;

[0012] The central groove is matched with the water outlet hole to be provided with a water outlet opening and closing member;

[0013] A polyhedron 1 is provided at the center of the central groove to cooperate with the water outlet opening and closing component, and the polyhedron 1 is movably connected to the water outlet opening and closing component.

[0014] Furthermore, the water outlet opening and closing component includes a disc 1 and a polygonal column 2 fixed on a side of the center of the disc 1. The other side of the disc 1 is provided with a polygonal groove, and the polygonal groove is slidably connected to the polygonal column 1.

[0015] Furthermore, the water inlet opening and closing structure includes three side grooves provided on the valve plate structure, the three side grooves being arranged in a circular array evenly surrounding the outer side of the central groove, and the water inlet is connected to the leather cup through the water inlet opening and closing structure;

[0016] A group of water inlet holes is provided at the bottom of each side groove;

[0017] Each of the side grooves is provided with a column, and each group of the water inlet holes is provided around the column;

[0018] Each column is connected to a water inlet opening and closing member, and each group of water outlet holes is arranged adjacent to a group of water inlet holes. Each group of water outlet holes is connected to the adjacent group of water inlet holes through the side groove and the leather cup. The bowl of each leather cup is aligned with the adjacent group of water outlet holes and water inlet holes.

[0019] Wherein, the water inlet opening and closing component, the water outlet opening and closing component and the pressure relief opening and closing component are made of elastic material.

[0020] Furthermore, the water inlet opening and closing component includes a second disc, a connecting rod with one end vertically fixed to one side of the second disc, and an annular protrusion arranged on the outside of the other end of the connecting rod, and the connecting rod passes through the central through hole of the column.

[0021] Furthermore, the pressure relief opening and closing structure includes a plurality of pressure relief grooves evenly arranged around the outside of the central groove, and one end of the pressure relief groove is connected to the central groove;

[0022] The valve plate structure is provided with a protruding first groove edge at the edge of the central groove, and the valve plate structure is provided with a protruding second groove edge at the edge of the side groove;

[0023] The second groove is provided with a notch along a side facing the central groove;

[0024] The side of the valve plate structure on which the pressure relief groove is arranged is covered and connected with a pressure relief opening and closing component.

[0025] Furthermore, the pressure relief opening and closing member is in sheet shape and is provided with a cut hole;

[0026] The edge of the cut hole corresponds to the outer sides of the first groove edge and the second groove edge, and the inner edge of the cut hole is slidably clamped on the outer side of the water inlet opening and closing structure, so that the pressure relief opening and closing member passes through the first groove edge and the second groove edge and is laid flat on the valve plate structure;

[0027] The pressure relief opening and closing member is connected to the second groove along a sliding path.

[0028] Furthermore, the water inlet and outlet parts include a cover plate, and a water inlet and a water outlet are provided on a side of the cover plate away from the valve plate structure;

[0029] The cover plate is provided with an outer annular side wall and an inner annular side wall on a side facing the valve plate structure;

[0030] The outer annular side wall and the inner annular side wall, together with the valve plate structure, squeeze the pressure relief opening and closing member, so that an inner flow cavity is formed between the inner annular side wall and the outer annular side wall, and an outer flow cavity is formed inside the inner annular side wall;

[0031] One end of the inner flow cavity is connected to the water inlet, and the other end is connected to the three side grooves;

[0032] One end of the outer flow cavity is connected to the water outlet, and the other end is connected to the central groove.

[0033] During operation, the water pumping part is squeezed and stretched rhythmically. When the water pumping part is stretched, negative pressure is formed in the leather bowl, which will absorb the water outlet opening and closing part to adhere to the bottom of the central groove, thereby closing the water outlet hole.

[0034] At the same time, the negative pressure in the leather bowl will cause the water inlet opening and closing member to separate from the water inlet hole, thereby opening the water inlet hole. The water flow from the water inlet passes through the inner flow cavity, the side groove and the water inlet hole into the leather bowl.

[0035] When the pumping part is compressed, positive pressure is formed in the leather bowl, squeezing the water inlet opening and closing part to close the water inlet hole, and at the same time flushing the water outlet opening and closing part, and the water in the leather bowl flows into the central groove.

[0036] If the water outlet is open at this time, the water in the central groove flows from the central groove to the external flow cavity and then flows out of the water outlet.

[0037] If at this time, the water outlet is closed, and the water flows into the central groove through the water outlet hole first, the water in the central groove will squeeze the pressure relief opening and closing component at the pressure relief groove position. The pressure relief opening and closing component is a sheet-like structure laid on the valve plate structure. Since the pressure relief opening and closing component is made of elastic material, such as rubber, the area in contact with the pressure relief groove is not pressed, so it can be pushed up. Part of the pressure relief opening and closing component is separated from the valve plate structure, and the water flows into the space between the pressure relief opening and closing component and the valve plate structure, and enters the side groove through the notch of the second groove edge. The side groove is connected to the inner flow cavity, and then enters the inner flow cavity to achieve the purpose of pressure relief; when the next water inflow comes in, the water discharged into the inner flow cavity starts the next pressure relief process with the newly entered water.

[0038] A valve is set on the water outlet, which can be opened or closed according to actual needs, so there are two states: open and closed; the water inlet is connected to the toilet pool. Due to the pressure difference of the pool, even if the water outlet is closed, some water will enter the water inlet, causing excessive pressure. The pressure relief structure of this scheme is to release this part of the pressure; when the water outlet is closed, if the water pressure is too high, in addition to a part of the water flowing out of the water outlet, the other part will also be released through the pressure relief structure. The water outlet is connected to the water storage device, and the water storage device is connected to the sewer. The water in the water outlet eventually flows into the sewer through the water storage device.

[0039] It should be noted that the leather cup described in this scheme is actually part of the leather cup pump. The water inlet hole, water outlet hole, water inlet opening and closing part, water outlet opening and closing part, leather cup, and electric push rod in this scheme constitute the leather cup pump. When pumping water, the water inlet hole is opened and the water outlet hole is closed; when discharging water, the water inlet hole is closed and the water outlet hole is opened, thus forming a working cycle.

[0040] The protective cover comprises an upper cover and a lower cover which are coaxially connected, the upper cover is connected to the valve plate structure, and the lower cover is connected to the power support structure.

[0041] The beneficial effects of this solution can be seen from the description of the above solution, which has the following advantages:

[0042] (1) When the pressure in the leather cup and the center groove exceeds a certain value, the water flow will squeeze the pressure relief opening and closing part at the pressure relief groove position, and then return to the inner flow cavity and the water inlet from the side groove. Therefore, when the water outlet is closed at irregular intervals, the operation of the pumping part will not be stopped, and the pressure in the water pump will not be excessive.

[0043] (2) The water inlet and outlet parts are provided with an outer annular side wall and an inner annular side wall, which are connected to the water inlet and the water outlet respectively, and are also connected to the water inlet hole and the water outlet hole respectively; each leather bowl is connected to a group of water inlet holes and water outlet holes at the same time, and the structure is simple and compact;

[0044] (3) The position arrangement of the pressure relief groove, the position arrangement of the side groove notch, and the connection between the pressure relief groove and the side groove when the pressure relief opening and closing member is lifted make it possible to achieve the pressure relief function with only one groove, one notch and one flat-shaped part. Not only is the structure simple, but it also hardly affects the spatial arrangement of other parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural diagram of the present utility model.

[0046] Figure 2 for Figure 1 Schematic diagram of the structure after removing the water inlet and outlet parts.

[0047] Figure 3 for Figure 2 Schematic diagram of the structure without the water outlet opening and closing parts and the pressure relief opening and closing parts.

[0048] Figure 4 for Figure 3 Remove the valve plate structure and water inlet opening and closing parts, and only keep the structural diagram of the pumping parts.

[0049] Figure 5 This is a structural diagram of the valve plate structure of the utility model.

[0050] Figure 6 It is a structural schematic diagram of the water outlet opening and closing component of the utility model.

[0051] Figure 7 This is a structural diagram of the water inlet opening and closing component of the utility model.

[0052] Figure 8 It is a structural schematic diagram of the pressure relief opening and closing component of the utility model.

[0053] Figure 9 It is a structural diagram of the water inlet and outlet parts of the utility model.

[0054] Figure 10 It is a schematic diagram of the overall structure of the pressure relief structure of the utility model.

[0055] In the accompanying drawings: 1. Water inlet and outlet components; 11. Water outlet; 12. Water inlet; 13. Cover plate; 14. Outer annular sidewall; 15. Inner annular sidewall; 16. Inner flow chamber; 17. Outer flow chamber; 2. Pumping component; 21. Leather cup; 22. Connecting plate; 23. Electric push rod; 24. Push plate; 3. Valve plate structure; 31. Water inlet opening and closing structure; 311. Side groove; 312. Water inlet hole; 313. Cylinder; 32. Water outlet opening and closing structure; 321. Center groove; 322. Water outlet hole; 323. Polygonal prism one; 33. Pressure relief opening and closing structure; 331. Pressure relief groove; 332. First groove edge; 333. Second groove edge; 3331. Notch; 4. Water outlet opening and closing member; 41. Polygonal prism two; 42. Polygonal groove; 5. Water inlet opening and closing member; 51. Connecting rod; 52. Annular protrusion; 6. Pressure relief opening and closing member; 61. Cutting hole; 7. Upper cover; 8. Lower cover; 9. Power support structure. DETAILED DESCRIPTION

[0056] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods. Example

[0057] like Figure 1-10 As shown, this embodiment is a water pressure relief structure of a water pump, comprising an inlet and outlet member 1, the inlet and outlet member 1 being connected to a pumping member 2, and a valve plate structure 3 for controlling the communication between the inlet and outlet member 1 and the pumping member 2;

[0058] The water inlet and outlet part 1 includes a closing plate, a water inlet 12 and a water outlet 11 connected to the closing plate at one end;

[0059] The pumping member 2 includes a connecting plate 22, a plurality of leather cups 21 arranged around the center of the connecting plate 22 and used to generate a pressure difference, and an electric push rod 23 connected to the plurality of leather cups 21 via a pushing plate 24;

[0060] The valve plate structure 3 is provided with a water inlet opening and closing structure 31 for controlling the communication between the water inlet 12 and the leather cup 21 and a water outlet opening and closing structure 32 for controlling the communication between the water outlet 11 and the leather cup 21;

[0061] When the leather cup 21 is actually working, it cooperates with the electric push rod 23 to make the push plate 24 move up and down, and the push plate 24 drives multiple leather cups 21 to move. When the leather cup 21 is squeezed, positive pressure is formed inside the leather cup 21, and when the leather cup 21 is stretched, negative pressure is formed inside the leather cup 21; the electric push rod 23 is existing technology, and its technical principle will not be described in detail, but is hereby explained.

[0062] A pressure relief opening and closing structure 33 is also provided on the valve plate structure 3 , and both ends of the pressure relief opening and closing structure 33 are respectively connected to the water outlet opening and closing structure 32 and the water inlet opening and closing structure 31 .

[0063] The valve plate structure 3 is connected to the protective cover, and the pumping part 2 is arranged between the valve plate structure 3 and the protective cover. The bottom end of the protective cover is provided with a power support structure 9; wherein the power support structure 9 is a power motor, and the outer shell of the power motor provides a structure for supporting and locking the protective cover, and the power motor is a part of the structure on the electric push rod 23.

[0064] Furthermore, the water outlet opening and closing structure 32 includes a central groove 321 provided in the center of the valve plate structure 3. The central groove 321 is located on the side of the valve plate structure 3 facing away from the water pumping member 2. The water outlet 11 is connected to the leather cup 21 through the water outlet opening and closing structure 32.

[0065] Three groups of water outlet holes 322 are provided at the bottom of the central groove 321;

[0066] The central groove 321 is matched with the water outlet hole 322 to be provided with a water outlet opening and closing member 4;

[0067] A polygonal column 323 is provided at the center of the central groove 321 to cooperate with the water outlet opening and closing component 4. The polygonal column 323 is movably connected to the water outlet opening and closing component 4.

[0068] Furthermore, the water outlet opening and closing component 4 includes a disc 1, a polygonal column 2 41 fixed to a side of the center of the disc 1, and a polygonal groove 42 is provided on the other side of the disc 1, and the polygonal groove 42 is slidably connected to the polygonal column 1 323.

[0069] To explain in detail, polygonal column 2 41 is located on the side of the water outlet opening and closing component 4 facing away from polygonal column 1 323, and a polygonal groove 42 is provided from the side of the water outlet opening and closing component 4 facing polygonal column 1 323 to polygonal column 2 41; in detail, when the leather cup 21 forms a positive pressure, the water outlet opening and closing component 4 will leave the water outlet hole 322; when the leather cup 21 forms a negative pressure, the water outlet opening and closing component 4 will slide to the bottom of the central groove 321, blocking the water outlet hole 322; when the water outlet opening and closing component 4 is closed, all three groups of water outlet holes 322 are blocked.

[0070] The polygonal groove 42 on the water outlet opening and closing component 4 slides up and down along the polygonal column 1 323. When the water pumping component 2 sucks downward, the water outlet opening and closing component 4 is adsorbed on the bottom of the central groove 321, covering the water outlet hole 322; when the water pumping component 2 pushes upward, the water pumping component 2 is at the bottom, pushing the water out of the water outlet hole 322, so that the water flow pushes the water outlet opening and closing component 4 upward, and the water outlet opening and closing component 4 slides upward along the polygonal column 1 323, no longer blocking the water outlet hole 322.

[0071] Among them, the polygonal column 323 slides and limits in the polygonal groove 42, which efficiently and quickly realizes the opening and sealing of the water outlet opening and closing component 4 to the central groove 321, and automatically adjusts according to the positive and negative pressure states of the leather bowl 21. There is no need to design a corresponding on-off controller separately. The design is ingenious and greatly reduces costs.

[0072] Furthermore, the water inlet opening and closing structure 31 includes three side grooves 311 provided on the valve plate structure. The three side grooves 311 are evenly arranged in an annular array around the outside of the central groove 321. The water inlet 12 is connected to the leather cup 21 through the water inlet opening and closing structure 31.

[0073] A set of water inlet holes 312 is provided at the bottom of each side groove 311;

[0074] Each side groove 311 is provided with a column 313, and each group of water inlet holes 312 is provided around the column 313;

[0075] Each column is connected to a water inlet opening and closing member 5, and each set of water outlet holes 322 is arranged adjacent to a set of water inlet holes 312. Each set of water outlet holes 322 is connected to the adjacent set of water inlet holes 312 through the side groove 311 and the leather cup 21. In other words, the bowl of each leather cup 21 is aligned with the adjacent set of water outlet holes 322 and water inlet holes 312.

[0076] Furthermore, the water inlet opening and closing component 5 includes a second disc, a connecting rod 51 with one end vertically fixed to one side of the second disc, and an annular protrusion 52 arranged on the outside of the other end of the connecting rod 51, and the connecting rod 51 passes through the central through hole of the column 313.

[0077] To explain further, during specific operation, when the leather cup 21 forms a positive pressure, the water inlet opening and closing member 5 will block the water inlet hole 312; when the leather cup 21 forms a negative pressure, the water inlet opening and closing member 5 will roll over and leave the water inlet hole 312.

[0078] When the leather bowl 21 forms a negative pressure, the water inlet opening and closing member 5 is opened and the water outlet opening and closing member 4 is closed; when the leather bowl 21 forms a positive pressure, the water inlet opening and closing member 5 is closed and the water outlet opening and closing member 4 is closed; the pressure relief opening and closing member 6 is in a normally closed state. When the water outlet 11 is closed and the water pumping member 2 forms a positive pressure, the pressure relief opening and closing member 6 is opened.

[0079] Therefore, when the water inlet opening and closing structure 31 is opened and the water outlet opening and closing structure 32 is closed, the water flow from the water inlet hole 312 enters the leather bowl 21; when the water inlet opening and closing structure 31 is closed and the water outlet opening and closing structure 32 is opened, the water flow sucked into the leather bowl 21 enters and goes out through the water outlet hole 322.

[0080] Furthermore, the pressure relief opening and closing structure 33 includes a plurality of pressure relief grooves 331 evenly arranged around the outside of the central groove 321, and one end of the pressure relief groove 331 is connected to the central groove 321;

[0081] The valve plate structure 3 is provided with a protruding first groove edge 332 at the edge of the central groove 321 , and the valve plate structure 3 is provided with a protruding second groove edge 333 at the edge of the side groove 311 ;

[0082] A notch 3331 is provided on one side of the second groove edge 333 facing the central groove 321 ;

[0083] The side of the valve plate structure 3 where the pressure relief groove 331 is provided is covered and connected with a pressure relief opening and closing member 6 .

[0084] Furthermore, the pressure relief opening and closing member 6 is in a sheet shape and is provided with a cutout hole 61;

[0085] The edge of the cutout 61 corresponds to the outer sides of the first groove edge 332 and the second groove edge 333. The inner edge of the cutout 61 is slidably clamped on the outer side of the water inlet opening and closing structure 31, so that the pressure relief opening and closing member 6 passes through the first groove edge 332 and the second groove edge 333 and is laid flat on the valve plate structure 3.

[0086] The pressure relief opening and closing member 6 is slidably connected to the second groove edge 333 .

[0087] To explain further, when the pressure relief opening and closing member 6 is closed, the pressure relief opening and closing member 6 covers the top of the pressure relief groove 331 , and the pressure relief opening and closing member 6 closes the gap of the side groove 311 .

[0088] Only when the pressure in the central groove 321 is large enough will the pressure relief opening and closing member 6 be forced to deform, slide along the second groove edge 333, and leave the pressure relief groove 331, allowing water to flow smoothly between the pressure relief groove 331 and the side groove 311 and the water inlet hole 312.

[0089] Furthermore, the water inlet and outlet member 1 includes a cover plate 13, and a water inlet 12 and a water outlet 11 are provided on a side of the cover plate 13 facing away from the valve plate structure;

[0090] The cover plate 13 is provided with an outer annular side wall 14 and an inner annular side wall 15 on a side facing the valve plate structure;

[0091] The outer annular side wall 14 and the inner annular side wall 15 together with the valve plate structure 3 squeeze the pressure relief opening and closing member 6, so that an inner flow cavity 16 is formed between the inner annular side wall 15 and the outer annular side wall 14, and an outer flow cavity 17 is formed inside the inner annular side wall 15;

[0092] One end of the inner flow cavity 16 is connected to the water inlet 12, and the other end is connected to the three side grooves 311;

[0093] One end of the outer flow cavity 17 is connected to the water outlet 11 , and the other end is connected to the central groove 321 .

[0094] The protective cover includes an upper cover 7 and a lower cover 8 that are coaxially connected. The upper cover 7 is connected to the valve plate structure 3 , and the lower cover 8 is connected to the power support structure 9 .

[0095] The specific working process of this utility model:

[0096] During operation, the water pumping member 2 is squeezed and stretched rhythmically. When the water pumping member 2 is stretched, negative pressure is formed inside the leather cup 21, which will absorb the water outlet opening and closing member 4 and attach it to the bottom of the central groove 321, thereby closing the water outlet hole 322.

[0097] At the same time, the negative pressure in the leather cup 21 will cause the water inlet opening and closing member 5 to separate from the water inlet hole 312, thereby opening the water inlet hole 312, and the water flow from the water inlet 12 enters the leather cup 21 through the inner flow cavity 16, the side groove 311 and the water inlet hole 312.

[0098] When the water pumping member 2 is compressed, positive pressure is formed in the leather cup 21, squeezing the water inlet opening and closing member 5 to close the water inlet hole 312, and at the same time flushing the water outlet opening and closing member 4, and the water in the leather cup 21 flows into the central groove 321.

[0099] If the water outlet 11 is in the open state at this time, the water in the central groove 321 flows from the central groove 321 to the external flow cavity 17 and then flows out of the water outlet 11 .

[0100] If the water outlet 11 is closed at this time, the water flow in the central groove 321 will squeeze the pressure relief opening and closing component 6 at the pressure relief groove 331, and the water flow will enter between the pressure relief opening and closing component 6 and the valve plate structure 3, and enter the side groove 311 through the notch 3331 of the second groove edge 333, and then enter the inner flow cavity 16 to achieve the purpose of pressure relief.

[0101] Therefore, in summary, this solution is divided into a normal pumping state and a self-pressure relief state. When in the normal pumping state, the pressure relief groove 331 on the valve plate structure 3 is in a sealed state and no water flows through it. When the pump is working, negative pressure is generated, and water enters from the water inlet. The water flow from the water inlet passes through the inner flow cavity 16, the side groove 311 and the water inlet hole 312 and enters the leather cup 21. After being compressed by the pump, it comes out from the water outlet 11. The water outlet 11 is in an open state, realizing the normal pumping function.

[0102] When in the self-pressure relief state, when the water outlet 11 is in a sealed state, no water flows out of the water outlet 11. Under the action of its own water pressure, the water flows through the pressure relief groove 331, flushes open the pressure relief opening and closing member 6, and forms a gap, so that the originally blocked pressure relief groove 331 becomes a through port, and the water flow of the pump forms a circulation inside, thereby realizing the pressure relief function. Example

[0103] In another embodiment based on Example 1, the structures of the water outlet opening and closing structure 32, the water inlet opening and closing structure 31 and the pressure relief opening and closing structure 33 are not limited to the structures in Example 1, and corresponding structures can also be designed based on their functionality. For example, the water outlet opening and closing structure 32, the water inlet opening and closing structure 31 and the pressure relief opening and closing structure 33 all serve as valves. Therefore, the water outlet opening and closing structure 32, the water inlet opening and closing structure 31 and the pressure relief opening and closing structure 33 can also be valve structures in the prior art. The valve is a conventional structure and can be designed by those skilled in the art according to actual application scenarios.

[0104] The technical features not described in the present invention can be realized through or by adopting the existing technology, and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A water pump water pressure relief structure, characterized in that: It comprises a water inlet and outlet member (1), a valve plate structure (3), a pressure relief opening and closing member (6) arranged between the water inlet and outlet member (1) and the valve plate structure (3), a water pumping member (2), and a protective cover connected to the valve plate structure (3), wherein the water pumping member (2) is arranged between the valve plate structure (3) and the protective cover, and a power support structure (9) is provided at the bottom end of the protective cover; The water inlet and outlet member (1) comprises a closing plate, a water inlet (12) and a water outlet (11) connected to the closing plate; The pumping member (2) comprises a connecting plate (22), and a plurality of leather cups (21) arranged on the connecting plate (22) and used to generate a pressure difference; The valve plate structure (3) is provided with a water inlet opening and closing structure (31) for controlling the communication between the water inlet (12) and the leather bowl (21), a water outlet opening and closing structure (32) for controlling the communication between the water outlet (11) and the leather bowl (21), and a pressure relief opening and closing structure (33) in communication with the water outlet opening and closing structure (32) and the water inlet opening and closing structure (31); The water outlet opening and closing structure (32) comprises a central groove (321) provided at the center of the valve plate structure (3), wherein the central groove (321) is located on a side of the valve plate structure (3) facing away from the water pumping member (2); The bottom of the central groove (321) is provided with a plurality of water outlet holes (322); the central groove (321) is provided with a water outlet opening and closing member (4) in cooperation with the water outlet holes (322); the water outlet holes (322) and the water outlet opening and closing member (4) form a valve hole structure; A polygonal column (323) is provided at the center of the central groove (321) in coordination with the water outlet opening and closing member (4), and the polygonal column (323) is movably connected to the water outlet opening and closing member (4); The water inlet opening and closing structure (31) comprises a plurality of side grooves (311) provided on the valve plate structure (3), wherein the plurality of side grooves (311) are arranged in an annular array and uniformly surround the outer side of the central groove (321); A plurality of water inlet holes (312) are provided at the bottom of each side groove (311), a column (313) is provided inside each side groove (311), the plurality of water inlet holes (312) are arranged around the column (313), and a water inlet opening and closing member (5) is provided on the column; The mouth of each leather bowl (21) is aligned with a group of water outlet holes (322) and water inlet holes (312) close to each other, and each group of water outlet holes (322) is connected to a group of water inlet holes (312) close to it through the side groove (311), the leather bowl (21) and the adjacent group of water outlet holes (312); The pressure relief opening and closing structure (33) comprises a plurality of pressure relief grooves (331) uniformly arranged around the outside of the central groove (321), one end of the pressure relief grooves (331) is connected to the central groove (321), and a surface of the valve plate structure (3) on which the pressure relief grooves (331) are arranged is covered and connected with a pressure relief opening and closing member (6); The water inlet and outlet member (1) comprises a cover plate (13), the water inlet (12) and the water outlet (11) being provided on a side of the cover plate (13) facing away from the valve plate structure (3), and an outer annular side wall (14) and an inner annular side wall (15) being provided on a side of the cover plate (13) facing the valve plate structure (3); An inner circulation cavity (16) is formed between the inner annular side wall (15) and the outer annular side wall (14), and an outer circulation cavity (17) is formed inside the inner annular side wall (15); one end of the inner circulation cavity (16) is connected to the water inlet (12), and the other end is connected to the plurality of side grooves (311); one end of the outer circulation cavity (17) is connected to the water outlet (11), and the other end is connected to the central groove (321); The water inlet opening and closing component (5), the water outlet opening and closing component (4) and the pressure relief opening and closing component (6) are made of elastic material.

2. A water pump water pressure relief structure according to claim 1, characterized in that: The water outlet opening and closing member (4) comprises a disc 1, a polygonal column 2 (41) fixed to a side of the center of the disc 1, and a polygonal groove (42) is provided on the other side of the disc 1. The polygonal groove (42) is slidably connected to the polygonal column 1 (323).

3. A water pump water pressure relief structure according to claim 1, characterized in that: The water inlet opening and closing member (5) comprises a second disc, a connecting rod (51) having one end vertically fixed to one side surface of the second disc, and an annular protrusion (52) arranged on the outside of the other end of the connecting rod (51), wherein the connecting rod (51) passes through the central through hole of the column (313).

4. A water pump water pressure relief structure according to claim 1, characterized in that: The pressure relief opening and closing member (6) is in the form of a sheet and is provided with a plurality of cutouts (61). The inner edges of the cutouts (61) are slidably clamped on the outer sides of the water inlet opening and closing structure (31), so that the pressure relief opening and closing member (6) is flattened on the valve plate structure (3).

5. The water pump water pressure relief structure according to claim 1, characterized in that: The protective cover comprises an upper cover (7) and a lower cover (8) that are coaxially connected, the upper cover (7) is connected to the valve plate structure (3), and the lower cover (8) is connected to the power support structure (9).

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