Self-pressure-relief circulating water pump

Abstract

The utility model provides a self-pressure-relief circulating water pump, and belongs to the technical field of water pumps. The circulating water pump comprises a water pump body and a pump cover, the pump cover is detachably arranged on the water pump body, a water inlet and a water outlet are formed in the water pump body, a water inlet pipe and a water outlet pipe are arranged on the pump cover, the water inlet pipe is communicated with the water inlet, and the water outlet pipe is communicated with the water outlet. A circulating cavity is formed in the pump cover, is communicated with the water outlet pipe through a pressure stabilizing opening and is communicated with the water inlet pipe through a pressure relief opening; and a self-pressure-relief assembly is arranged in the circulating cavity, blocks the pressure stabilizing opening under the action of elastic force and can open the pressure stabilizing opening when the pressure of fluid in the water outlet pipe exceeds a preset value, so that the pressure stabilizing opening communicates with the pressure relief opening through the circulating cavity. According to the water pump, full-mechanical automatic pressure relief can be achieved through the self-pressure-relief assembly, reliability is high, and long-term stable operation of the water pump can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, and in particular to a self-relief circulating water pump. Background Technology

[0002] Water pumps, as common fluid transport devices, are widely used in various cleaning, irrigation, and circulation systems. Their basic function is to apply a preset pressure to the input fluid and output it. In practical use, especially in intermittently operating cleaning equipment, water pumps often face a common technical problem: when the equipment stops spraying liquid (e.g., when the spray gun or nozzle is turned off), the water outlet passage is closed or blocked, preventing the pumped fluid from being discharged normally. At this time, the pressure in the pump's outlet chamber and connecting pipes rises rapidly. If the pump continues to operate, this accumulating pressure can easily overload the drive motor, causing overload, overheating, or even burnout, severely affecting the pump's lifespan and operational reliability.

[0003] To address this technical problem, existing technologies typically involve adding a pressure detection device (such as a pressure sensor) and a solenoid valve to the water pump, and using a circuit control system to monitor the outlet water pressure in real time. When the detected pressure exceeds a set threshold, the control system cuts off the power to the pump motor, causing it to stop working. However, this increases the manufacturing cost of the circulating water pump, and the electrical components increase the probability of pump failure.

[0004] Therefore, existing circulating water pumps need to be improved to overcome the shortcomings of the existing technology. Utility Model Content

[0005] To overcome the problems existing in related technologies, the purpose of this utility model is to provide a self-relief circulating water pump. This water pump can achieve fully mechanical automatic pressure relief through a self-relief component, which has high reliability and helps to achieve long-term stable operation of the water pump.

[0006] A self-relief circulating water pump, comprising:

[0007] The pump body and the pump cover are provided. The pump cover is detachably mounted on the pump body. The pump body is provided with an inlet and an outlet. The pump cover is provided with an inlet pipe and an outlet pipe. The inlet pipe is connected to the inlet and the outlet pipe is connected to the outlet.

[0008] The pump cover is provided with a circulation chamber, which is connected to the water outlet pipe through a pressure stabilizing port and to the water inlet pipe through a pressure relief port;

[0009] The self-pressure relief assembly is arranged at the steady pressure port and is capable of being opened when the fluid pressure in the outlet pipe exceeds a preset value, so that the steady pressure port is communicated with the pressure relief port through the circulation cavity.

[0010] In the preferable technical scheme of the utility model, the self-pressure relief assembly comprises a blocking piece and an elastic piece, the blocking piece is arranged at the steady pressure port, and the elastic piece is arranged between the blocking piece and the inner wall of the circulation cavity; the elastic piece applies force to the blocking piece so that the blocking piece blocks the steady pressure port.

[0011] In the preferable technical scheme of the utility model, the self-pressure relief circulation water pump further comprises a pressure regulating assembly; one side of the circulation cavity is provided with a mounting position, and the pressure regulating assembly is movably arranged in the mounting position.

[0012] One end of the elastic piece is abutted at the steady pressure port, and the opposite end is abutted on the pressure regulating assembly; the compression amount of the elastic piece can be changed by moving the pressure regulating assembly, so that the elastic pre-tightening force of the elastic piece is adjusted.

[0013] In the preferable technical scheme of the utility model, the pressure regulating assembly comprises a pressure regulating seat and a sealing ring, the pressure regulating seat is threadedly connected with the mounting position; one side of the pressure regulating seat is provided with a limiting column, one end of the elastic piece is clamped on the limiting column, and the sealing ring is arranged on the pressure regulating seat and the outer wall of the sealing ring is abutted against the inner wall of the mounting position.

[0014] In the preferable technical scheme of the utility model, the pressure regulating assembly comprises a pressure regulating seat and a sealing ring, the pressure regulating seat is threadedly connected with the mounting position; one side of the pressure regulating seat is provided with a limiting column, one end of the elastic piece is clamped on the limiting column, and the sealing ring is arranged on the pressure regulating seat and the outer wall of the sealing ring is abutted against the inner wall of the mounting position.

[0015] One side of the pressure regulating seat is provided with a limiting column for limiting the elastic piece.

[0016] In the preferable technical scheme of the utility model, the circulation cavity is provided with a flow guide structure, the flow guide structure comprises a plurality of convex ribs, the plurality of convex ribs are arranged on the inner wall of the circulation cavity, and the plurality of convex ribs are evenly distributed on the inner wall of the circulation cavity along the circumferential direction of the circulation cavity.

[0017] In the preferable technical scheme of the utility model, in the circulation cavity, the height of the convex rib gradually increases in the direction from the steady pressure port to the pressure relief port.

[0018] In the preferable technical scheme of the utility model, the water pump body includes a motor, an impeller is arranged at the output end of the motor, and the impeller is arranged at one side of the water inlet and the water outlet.

[0019] In the preferable technical scheme of the utility model, the bottom of the motor is provided with a conductive pin, and the conductive pin is made of elastic material.

[0020] The utility model discloses a beneficial effect is:

[0021] The utility model provides a kind of from pressure relief circulating water pump, the circulating water pump includes water pump body and pump cover, pump cover detachably arranged on water pump body, water pump body is provided with water inlet and water outlet, pump cover is provided with water inlet pipe and water outlet pipe, water inlet pipe is communicated with water inlet, and water outlet pipe is communicated with water outlet.Pump cover is provided with circulating cavity, circulating cavity is communicated with water outlet pipe by pressure stabilizing port, and is communicated with water inlet pipe by pressure relief port;Self pressure relief assembly is arranged in circulating cavity, and self pressure relief assembly is blocked pressure stabilizing port under the action of elastic force, and can open pressure stabilizing port when the fluid pressure in water outlet pipe exceeds preset value, so that pressure stabilizing port is communicated with pressure relief port by circulating cavity.The water pump works, and external fluid is inhaled from water inlet pipe by water pump body, and fluid is discharged from water outlet to the water outlet pipe of pump cover.Normally, self pressure relief assembly is kept to the blocking state of pressure stabilizing port by resisting at pressure stabilizing port, and fluid is all transported to external pipeline from water outlet pipe;When external pipeline is blocked or flow is suddenly reduced, the fluid pressure in water outlet pipe rapidly rises, and when fluid pressure is greater than the elastic force of self pressure relief assembly, self pressure relief assembly is moved along circulating cavity in the direction away from pressure stabilizing port, and pressure stabilizing port is opened, and high-pressure fluid enters circulating cavity through pressure stabilizing port, and then flows back to water inlet pipe through pressure relief port, to form internal circulation, and as part of fluid flows back, the pressure in water outlet pipe gradually reduces, and when the pressure is lower than preset value, the elastic force of compression spring again pushes self pressure relief assembly to reset, to reseal pressure stabilizing port, and the water pump restores normal fluid transport state.The water pump completes pressure regulation by pure mechanical self pressure relief assembly, does not need to rely on external power or electronic component, can improve the operation reliability of water pump, and the pure mechanical self pressure relief assembly can reduce the manufacturing cost of water pump, to improve the market competitiveness of water pump. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the perspective view of the self pressure relief circulating water pump provided in the embodiment of the utility model;

[0023] Figure 2 It is the side view of the self pressure relief circulating water pump provided in the embodiment of the utility model;

[0024] Figure 3 It is the schematic view of pump body provided in the embodiment of the utility model;

[0025] Figure 4 is a perspective view of a self-pressure relief assembly provided in an embodiment of the present application;

[0026] Figure 5 is a schematic view of the self-pressure relief assembly provided in a pump cover in an embodiment 1 of the present application;

[0027] Figure 6 is a schematic view of the inside of a pump cover not including the self-pressure relief assembly in an embodiment 1 of the present application;

[0028] Figure 7 is a schematic view of the self-pressure relief assembly provided in a pump cover in an embodiment 2 of the present application.

[0029] Reference signs:

[0030] 1, water pump body; 11, motor; 12, water outlet; 13, water inlet; 111, conductive pin; 2, pump cover; 21, water outlet pipe; 22, water inlet pipe; 23, circulating cavity; 24, locking piece; 231, pressure stabilizing port; 232, pressure relief port; 233, protruding rib; 3, self-pressure relief assembly; 31, plugging piece; 32, elastic piece; 33, pressure regulating seat; 331, limiting column; 34, sealing ring. DETAILED DESCRIPTION

[0031] Preferred embodiments of the present application will be described in more detail by making reference to the accompanying drawings. Although preferred embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided in order to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0032] In order to solve the problem of long-term load operation of the motor caused by excessive pressure at the water outlet of the water pump, the prior art usually adds a pressure detection device (such as a pressure sensor) and an electromagnetic valve in the water pump, and monitors the outlet water pressure in real time through a circuit control system. When the detected pressure exceeds the set threshold, the control system cuts off the power supply of the water pump motor to stop its work. However, this increases the manufacturing cost of the circulating water pump, and the electrical components increase the probability of water pump failure.

[0033] Based on this, the present application provides a self-pressure relief circulating water pump.

[0034] Embodiment 1

[0035] As shown in Figures 1-6 , the self-pressure relief circulating water pump provided by the present embodiment comprises:

[0036] The water pump body 1 and the pump cover 2 detachably arranged on the water pump body 1, the water pump body 1 is provided with a water inlet 13 and a water outlet 12, the pump cover 2 is provided with a water inlet pipe 22 and a water outlet pipe 21, the water inlet pipe 22 communicates with the water inlet 13, and the water outlet pipe 21 communicates with the water outlet 12;

[0037] The pump cover 2 is provided with a circulating cavity 23, the circulating cavity 23 communicates with the water outlet pipe 21 through a pressure stabilizing port 231 and communicates with the water inlet pipe 22 through a pressure relief port 232;

[0038] The circulating cavity 23 is provided with a self-pressure relief assembly 3, the self-pressure relief assembly 3 blocks the pressure stabilizing port 231 under the action of elastic force, and can open the pressure stabilizing port 231 when the fluid pressure in the water outlet pipe 21 exceeds a preset value, so that the pressure stabilizing port 231 communicates with the pressure relief port 232 through the circulating cavity 23.

[0039] Specifically, the water pump body 1 includes a motor 11, the output end of the motor 11 is provided with an impeller, and the impeller is arranged on one side of the water inlet 13 and the water outlet 12.

[0040] Further, the bottom of the motor 11 is provided with a conductive pin 111 made of elastic material.

[0041] The water pump body 1 is integrally formed with a water inlet 13 and a water outlet 12, the water inlet 13 is used for accessing the fluid to be conveyed, and the water outlet 12 is used for outputting the pressurized fluid; the pump cover 2 is correspondingly provided with a water inlet pipe 22 and a water outlet pipe 21, the water inlet pipe 22 and the water inlet 13 can be sealed and communicated through a sealing joint, and the water outlet pipe 21 and the water outlet 12 are also sealed and communicated through a sealing joint, so as to ensure that there is no leakage during the fluid conveying process.

[0042] The pump body of the application integrates the motor 11, the impeller, the water inlet cavity and the water outlet cavity, the output end of the driving motor 11 is fixedly connected with the impeller through a shaft coupling, and the impeller is arranged in the fluid passage between the water inlet cavity and the water outlet cavity. After the motor 11 is started, the impeller is driven to rotate at a high speed, the fluid input by the water inlet cavity is pressurized by the centrifugal force, and then is output from the water outlet cavity; the outer side of the pump body 1 is provided with a water inlet 13 communicated with the water inlet cavity and a water outlet 12 communicated with the water outlet cavity, and a sealing groove is arranged at each of the water inlet 13 and the water outlet 12 for adapting a sealing member to realize leak-proof connection. The output end of the motor 11 is fixedly connected with the impeller through a shaft coupling, and the impeller is arranged in the fluid passage between the water inlet 13 and the water outlet 12. After the motor 11 is started, the impeller is driven to rotate at a high speed, and the fluid input by the water inlet 13 is pressurized by the centrifugal force of the impeller and then is output from the water outlet 12 to the water outlet pipe 21. The bottom of the motor 11 is provided with a conductive pin 111 made of elastic material, which can adapt to the slight ups and downs of the installation surface through elastic deformation to ensure the stable electrical connection between the motor 11 and the power supply circuit, and has a certain buffering and damping effect.

[0043] When the water pump works, the external fluid is sucked into the water pump body 1 from the water inlet pipe 22, and the fluid is discharged from the water outlet 12 to the water outlet pipe 21 of the pump cover 2. During normal operation, the self-pressure relief assembly 3 abuts against the pressure stabilization port 231 to maintain the sealing state of the pressure stabilization port 231, and the fluid is completely transported from the water outlet pipe 21 to the external pipeline; when the external pipeline is blocked or the flow is suddenly reduced, the fluid pressure in the water outlet pipe 21 rapidly rises, and when the fluid pressure is greater than the elastic force of the self-pressure relief assembly 3, the self-pressure relief assembly 3 is pushed to move along the circulation cavity 23 away from the pressure stabilization port 231, the pressure stabilization port 231 is opened, the high-pressure fluid enters the circulation cavity 23 through the pressure stabilization port 231, and then flows back to the water inlet 13 of the water pump body 1 through the pressure relief port 232 to form internal circulation in the water pump body 1. With the backflow of part of the fluid, the pressure in the water outlet pipe 21 gradually decreases, and when the pressure is lower than the preset value, the elastic force of the compression spring again pushes the self-pressure relief assembly 3 to reset, re-seals the pressure stabilization port 231, and the water pump restores the normal fluid transport state.

[0044] When the outlet pipe 21 is blocked and the internal pressure exceeds the preset value, the fluid pressure will push the self-pressure relief assembly 3 to overcome the pre-tightening force of the elastic member 32 to open the pressure stabilization port 231. At this time, the high-pressure fluid enters the circulation cavity 23 through the pressure stabilization port 231, and then flows back to the water inlet 13 of the water pump body 1 through the flow guide channel and the pressure relief port 232, forming a fluid circulation loop. The motor 11 of the water pump body 1 does not need to be stopped and can always be in a continuous working state, effectively avoiding the damage of the motor 11 caused by sudden pressure increase, and significantly improving the use reliability and service life of the water pump. The self-pressure relief assembly realizes automatic pressure regulation through mechanical structure, without the need for additional electromagnetic valves, pressure sensors and complex control circuits to control the on-off of the motor 11. Not only simplifies the equipment structure, reduces the production and assembly cost, but also reduces the risk of line failure; at the same time, the structure is compact, occupies small space, is suitable for small cleaning equipment and other scenes with strict requirements on volume, and has wider adaptation range.

[0045] In a specific embodiment, the self-pressure relief assembly includes a blocking member 31 and an elastic member 32, the blocking member 31 is arranged at the pressure stabilization port 231, and the elastic member 32 is arranged between the blocking member 31 and the inner wall of the circulation cavity 23; the elastic member 32 applies a force to the blocking member 31 to block the pressure stabilization port 231.

[0046] Further, the self-pressure relief circulating water pump further includes a pressure regulating assembly; one side of the circulation cavity 23 is provided with a mounting position, and the pressure regulating assembly is movably arranged in the mounting position.

[0047] One end of the elastic member 32 abuts at the pressure stabilization port 231, and the other end abuts on the pressure regulating assembly; by moving the pressure regulating assembly, the compression amount of the elastic member 32 can be changed to adjust the size of the elastic pre-tightening force of the elastic member 32.

[0048] More specifically, the pressure regulating assembly includes a pressure regulating seat 33 and a sealing ring 34, the pressure regulating seat 33 is threadedly connected with the mounting position; one side of the pressure regulating seat 33 is provided with a limiting column 331, one end of the elastic member 32 is clamped on the limiting column 331, and the sealing ring 34 is arranged on the pressure regulating seat 33 and the outer wall of the sealing ring 34 abuts against the inner wall of the mounting position.

[0049] The blocking member 31 is made of a cylindrical plug made of rubber material, the diameter of which is matched with the inner diameter of the pressure stabilization port 231, and the end of the blocking member 31 towards the pressure stabilization port 231 is provided with an arc-shaped sealing surface which can closely fit the edge of the pressure stabilization port 231 to improve the sealing effect; the outer peripheral wall of the blocking member 31 is provided with an annular guide groove which is in sliding cooperation with the protruding guide ribs on the inner wall of the circulation cavity 23 to ensure that the blocking member 31 only moves axially along the pressure stabilization port 231 and avoid deviation to cause sealing failure.

[0050] The elastic member 32 is made of corrosion-resistant stainless steel compression spring. One end of the elastic member 32 abuts against the end face of the plugging member 31 away from the pressure stabilizing port 231, and the other end abuts against the pressure regulating assembly. The elastic member 32 exerts pressure on the plugging member 31 towards the pressure stabilizing port 231 through its elastic pre-tightening force, so that the plugging member 31 is kept in a plugging state of the pressure stabilizing port 231 in normal condition, thereby preventing the fluid in the water outlet pipe 21 from entering the circulating cavity 23.

[0051] The pressure regulating seat 33 is made of brass. The outer peripheral wall of the pressure regulating seat 33 is provided with external threads matched with the internal threads of the mounting position. The pressure regulating seat 33 can be axially moved in the mounting position by rotating the pressure regulating seat 33. The side of the pressure regulating seat 33 facing the elastic member 32 is integrally formed with a cylindrical limiting column 331. The diameter of the limiting column 331 is matched with the inner diameter of the elastic member 32. The end of the elastic member 32 away from the plugging member 31 can be clamped on the limiting column 331, so as to avoid lateral deviation of the elastic member 32 during compression. The end of the pressure regulating seat 33 away from the elastic member 32 is provided with an internal hexagonal recess, so as to facilitate rotation of the pressure regulating seat 33 by using an internal hexagonal wrench, thereby improving the operation convenience.

[0052] The sealing ring 34 is an O-ring made of butyronitrile rubber, which is sleeved in the annular sealing groove of the outer peripheral wall of the pressure regulating seat 33. The outer diameter of the sealing ring 34 is slightly larger than the inner diameter of the mounting position. When the pressure regulating seat 33 is installed in the mounting position, the sealing ring 34 is elastically extruded between the pressure regulating seat 33 and the inner wall of the mounting position, thereby preventing leakage of the fluid in the circulating cavity 23 from the gap between the pressure regulating seat 33 and the mounting position.

[0053] When it is necessary to adjust the opening pressure of the plugging member 31, an internal hexagonal wrench is inserted into the internal hexagonal recess of the pressure regulating seat 33, and the pressure regulating seat 33 is rotated clockwise. The pressure regulating seat 33 moves towards the inside of the circulating cavity 23 along the internal threads of the mounting position, pushes the limiting column 331 to extrude the elastic member 32, increases the compression amount of the elastic member 32, increases the pre-tightening force of the elastic member 32 on the plugging member 31, and further increases the opening pressure of the plugging member 31 (i.e. the fluid in the water outlet pipe 21 needs to reach a higher pressure to push the plugging member 31 to open). When the pressure regulating seat 33 is rotated counterclockwise, the pressure regulating seat 33 moves towards the outside of the circulating cavity 23, the compression amount of the elastic member 32 is reduced, the pre-tightening force is reduced, and the opening pressure of the plugging member 31 is reduced, thereby realizing flexible adjustment of the output pressure of the water pump.

[0054] In a better embodiment, a flow guide structure is arranged in the circulating cavity 23. The flow guide structure includes a plurality of protrusions 233. The plurality of protrusions 233 are arranged on the inner wall of the circulating cavity 23, and are uniformly distributed on the inner wall of the circulating cavity 23 along the circumferential direction of the circulating cavity 23.

[0055] Further, in the circulation cavity 23, the height of the convex rib 233 gradually increases along the direction from the pressure stabilizing port 231 to the pressure relief port 232.

[0056] The convex rib 233 with gradually changing height can guide the smooth flow of the fluid along the preset path, reduce the impact and collision of the fluid with the inner wall of the circulation cavity 23 and the edge of the pressure relief port 232, and compared with the circulation cavity 23 without the flow guiding structure, the flow noise during pressure relief can be reduced, which is more suitable for the scene sensitive to noise; the smooth flow path can reduce the energy loss of the fluid, so that the overpressure fluid still maintains a certain pressure when flowing back to the water inlet pipe 22, without the need for the water pump motor 11 to increase the power, the normal conveying can be maintained, the energy consumption of the motor 11 is indirectly reduced, and the overall energy efficiency ratio of the water pump is improved.

[0057] Embodiment 2

[0058] As shown in the figure, the embodiment provides another implementation of the pressure regulating assembly. Figure 7

[0059] Specifically, the pressure regulating assembly comprises a pressure regulating seat 33 and a sealing ring 34, the pressure regulating seat 33 is in sliding fit with the circulation cavity 23; the pump cover 2 is provided with a locking piece 24 for locking the pressure regulating seat 33, one end of the locking piece 24 penetrates through the side wall of the circulation cavity 23 and abuts against the pressure regulating seat 33.

[0060] One side of the pressure regulating seat 33 is provided with a limiting column 331 for limiting the elastic piece 32.

[0061] Specifically, the locking piece 24 is selected as an internal hexagonal set screw, and the material is stainless steel (anti-rust). The side wall of the pump cover 2 is provided with a threaded hole matched with the locking piece 24, the threaded hole penetrates into the inside of the circulation cavity 23, after the locking piece 24 is screwed in through the threaded hole, the end portion can abut against the outer peripheral wall of the pressure regulating seat 33, and the pressure regulating seat 33 is fixed at the target position in the circulation cavity 23 through the friction force.

[0062] In order to improve the locking stability, the outer peripheral wall of the pressure regulating seat 33 can be provided with a plurality of annular anti-skid grooves in the axial direction, and the end portion of the locking piece 24 can be embedded in the anti-skid groove, so as to avoid the displacement of the pressure regulating seat 33 due to vibration during the operation of the water pump.

[0063] Compared with the traditional threaded pressure regulating seat 33 (which needs to be rotated for multiple times to adjust the position), the sliding pressure regulating seat 33 of the embodiment can be directly pushed in the axial direction, the position adjustment is more intuitive, the single pressure regulating time can be shortened, and the embodiment is especially suitable for scenes such as production line debugging, on-site working condition switching and the like which need to quickly adjust the pressure. Without relying on the “rotation-axial movement” conversion of the threaded transmission, the problem of threaded jamming (such as threaded rusting caused by medium residue) can be avoided, the pressure regulating process is smoother, and the operation difficulty is reduced. ​

[0064] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings. In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0065] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0066] In addition, it needs to be explained that the use of "first", "second" and the like to limit the parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning if there is no further declaration, so it cannot be understood as a limitation on the protection scope of the present application. The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A self-pressure-relief circulating water pump, characterized in that: a pump body and a pump cover are provided, the pump cover is detachably arranged on the pump body, the pump body is provided with an inlet and an outlet, the pump cover is provided with an inlet pipe and an outlet pipe, the inlet pipe is communicated with the inlet, and the outlet pipe is communicated with the outlet; a circulating cavity is arranged in the pump cover, the circulating cavity is communicated with the outlet pipe through a pressure stabilizing port and communicated with the inlet pipe through a pressure relief port; a self-pressure-relief assembly is arranged in the circulating cavity, the self-pressure-relief assembly blocks the pressure stabilizing port under the action of elastic force, and the self-pressure-relief assembly opens the pressure stabilizing port when the fluid pressure in the outlet pipe exceeds a preset value, so that the pressure stabilizing port is communicated with the pressure relief port through the circulating cavity.

2. The self-pressure-relief circulating water pump according to claim 1, characterized in that: the self-pressure-relief assembly comprises a blocking piece and an elastic piece, the blocking piece is arranged at the pressure stabilizing port, and the elastic piece is arranged between the blocking piece and the inner wall of the circulating cavity; the elastic piece applies force to the blocking piece to block the pressure stabilizing port.

3. The self-pressure-relief circulating water pump according to claim 2, characterized in that: the self-pressure-relief circulating water pump further comprises a pressure regulating assembly; one side of the circulating cavity is provided with a mounting position, and the pressure regulating assembly is movably arranged in the mounting position; one end of the elastic piece abuts at the pressure stabilizing port, and the opposite end abuts on the pressure regulating assembly; the compression amount of the elastic piece can be changed by moving the pressure regulating assembly, so as to adjust the size of the elastic pre-tightening force of the elastic piece.

4. The self-pressure-relief circulating water pump according to claim 3, characterized in that: the pressure regulating assembly comprises a pressure regulating seat and a sealing ring, the pressure regulating seat is threadedly connected with the mounting position; one side of the pressure regulating seat is provided with a limiting column, one end of the elastic piece is clamped on the limiting column, and the sealing ring is arranged on the pressure regulating seat and the outer wall of the sealing ring abuts against the inner wall of the mounting position.

5. The self-pressure-relief circulating water pump according to claim 3, characterized in that: the pressure regulating assembly comprises a pressure regulating seat and a sealing ring, the pressure regulating seat is slidably matched with the circulating cavity; the pump cover is provided with a locking piece for locking the pressure regulating seat, one end of the locking piece penetrates through the side wall of the circulating cavity and abuts against the pressure regulating seat; one side of the pressure regulating seat is provided with a limiting column for limiting the elastic piece.

6. The self-pressure-relief circulating water pump according to any one of claims 1-5, characterized in that: a flow guiding structure is arranged in the circulating cavity, the flow guiding structure comprises a plurality of convex ribs, the plurality of convex ribs are arranged on the inner wall of the circulating cavity, and the plurality of convex ribs are uniformly distributed on the inner wall of the circulating cavity along the circumferential direction of the circulating cavity.

7. The self-pressure-relief circulating water pump according to claim 6, characterized in that: in the circulating cavity, the height of the convex ribs gradually increases in the direction from the pressure stabilizing port to the pressure relief port.

8. The self-pressure-relief circulating water pump according to any one of claims 1-5, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The water pump body comprises a motor, an impeller is arranged at an output end of the motor, and the impeller is arranged on one side of the water inlet and the water outlet.

9. The self-bleeding circulating water pump of claim 8, wherein: A conductive plug is arranged at the bottom of the motor, and the conductive plug is made of elastic material.

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