High-pressure piston type water pump with pressure stabilizing function

Abstract

The high-pressure piston type water pump with the pressure stabilizing function comprises a connector provided with a liquid inlet channel, a liquid discharging channel and a pressure stabilizing cavity, a power mechanism pumps liquid in the liquid inlet channel to the liquid discharging channel to be discharged, and a pressure control assembly seals a first through hole in an elastic abutting mode. And when the liquid discharge channel is blocked and the pressure is greater than the force value of the pressure control assembly, the liquid ejects the assembly to enter the pressure stabilizing cavity and flows back to the liquid inlet channel. The device further comprises a specific liquid discharge and liquid inlet channel structure, an inner cavity, a one-way valve, a pressure control assembly, a power mechanism and the like. The effects of stabilizing the internal pressure of the liquid drainage channel and guaranteeing normal operation of the high-pressure piston type water pump are achieved.

Description

Technical Field

[0001] This application relates to the field of fluid transport, and in particular to a high-pressure piston water pump with pressure stabilization function. Background Technology

[0002] High-pressure piston pumps, as machines that perform work on fluids, play a vital role in industrial production and daily life. With technological advancements and social development, their applications have continuously expanded, appearing in everything from household appliances to large-scale industrial systems. For example, in water supply projects, they ensure the water supply for urban residents; in air conditioning circulating water systems, they guarantee the normal operation of air conditioning systems; and in industrial water supply systems such as power plants, they are indispensable equipment. Simultaneously, in specialized fields such as shipbuilding and oil refining, high-pressure piston pumps also play a crucial role, driving the efficient development of these industries.

[0003] In the past, the common approach to achieving liquid transport and pressure increase was to design relatively complex high-pressure piston pumps. Some achieved liquid transport through the precise coordination of multiple components, while others utilized special transmission mechanisms to increase liquid pressure. These traditional designs typically involve numerous parts, requiring high technical expertise and significant cost in assembly and manufacturing. Moreover, due to their complex structure, they have a relatively high probability of failure during long-term use, making maintenance and repair more difficult. Furthermore, some pumps employ simpler designs, but they perform poorly in terms of operating pressure stability, making them unsuitable for applications with high pressure requirements.

[0004] However, existing high-pressure piston water pumps have significant drawbacks. Many pumps have complex structures, leading to high manufacturing costs. More seriously, their operating pressure is unstable, especially when used in equipment such as coffee machines. If the pump or the internal piping of the coffee machine becomes blocked, the pressure deviation will increase significantly, affecting product performance and potentially causing problems such as internal pipe rupture or leakage. Summary of the Invention

[0005] To address the problem of unstable pressure rise when the drainage channel is blocked, this application provides a high-pressure piston water pump with pressure stabilization function.

[0006] The high-pressure piston water pump with pressure stabilization function provided in this application adopts the following technical solution:

[0007] A high-pressure piston water pump with pressure stabilization function includes:

[0008] A connector is provided with an inlet channel, a outlet channel and a pressure stabilizing chamber. A first through hole connects the pressure stabilizing chamber and the outlet channel, and a second through hole connects the pressure stabilizing chamber and the inlet channel.

[0009] A power mechanism is used to pump the liquid from the inlet channel to the outlet channel for discharge.

[0010] A pressure control component, wherein the pressure control component uses an elastic clamping method to seal the first through hole, and the elastic force direction of the pressure control component is consistent with the drainage direction of the drainage pipe;

[0011] When the drain channel becomes blocked and the pressure inside the drain channel exceeds the pressure control component, the liquid in the drain channel pushes open the pressure control component and enters the pressure stabilizing chamber, and then flows back into the inlet channel through the second through hole, thereby stabilizing the pressure inside the drain channel.

[0012] By adopting the above technical solution, an inlet channel, a outlet channel, and a pressure stabilizing chamber are set up and connected through a first through hole and a second through hole. The power mechanism is used to pump the liquid from the inlet channel to the outlet channel for discharge. At the same time, the pressure control component elastically seals the first through hole. When the outlet channel is blocked and the internal pressure is greater than the force value of the pressure control component, the liquid can push open the pressure control component and flow back to the inlet channel through the pressure stabilizing chamber and the second through hole. This can solve the problem of unstable pressure rise when the outlet channel is blocked and play a role in stabilizing the internal pressure of the outlet channel.

[0013] Preferably, the drain channel includes a drain chamber disposed inside the connector and a drain pipe disposed outside the connector, and the inlet channel includes an inlet chamber disposed inside the connector and an inlet pipe disposed inside the connector; the first through hole connects the drain chamber and the pressure stabilizing chamber, and the second through hole connects the inlet chamber and the pressure stabilizing chamber.

[0014] By adopting the above technical solution, the specific composition of the drain channel and the inlet channel is clarified. The drain channel includes an internal drain chamber and an external drain pipe of the connector, and the inlet channel includes an internal inlet chamber and an internal inlet pipe of the connector. It is also clarified that the first through hole connects the drain chamber and the pressure stabilizing chamber, and the second through hole connects the inlet chamber and the pressure stabilizing chamber. This makes the flow path of the liquid in the water pump clearer and more definite, which is conducive to realizing the process of the liquid being pumped from the inlet channel to the drain channel through the power mechanism and discharged. At the same time, it also provides a specific structural basis for the liquid to enter the pressure stabilizing chamber through the first through hole and then flow back to the inlet channel through the second through hole when the drain channel is blocked, so as to stabilize the internal pressure of the drain channel.

[0015] Preferably, the connector has an internal cavity, a first check valve is provided between the internal cavity and the drain cavity, and a second check valve is provided between the internal cavity and the inlet cavity. The first and second check valves control the flow direction of the liquid in opposite directions. The power mechanism controls the internal pressure of the internal cavity by reciprocatingly squeezing the internal cavity space. When the pressure of the internal cavity is less than the external atmospheric pressure, the liquid in the inlet cavity enters the internal cavity through the second check valve. When the pressure of the internal cavity is greater than the external atmospheric pressure, the liquid in the internal cavity enters the drain cavity through the first check valve.

[0016] By adopting the above technical solution, an inner cavity is set inside the connector. With the cooperation of a first check valve and a second check valve flowing in opposite directions, the pressure inside the cavity is changed by the reciprocating compression of the inner cavity space using a power mechanism. This allows liquid in the inlet chamber to enter the inner cavity through the second check valve under the action of the pressure difference, while liquid in the inner cavity enters the outlet chamber through the first check valve under the action of the pressure difference. This achieves liquid flow in a specific direction, ensuring the normal suction and discharge functions of the water pump. Simultaneously, combined with the pressure stabilizing chamber and pressure control components, the internal pressure of the outlet channel can be effectively stabilized when the outlet channel is blocked, improving water pump performance.

[0017] Preferably, the pressure control assembly includes a mounting base disposed outside the connector, a receiving groove disposed inside the mounting base, a spring disposed inside the receiving groove, and a sealing rubber head disposed at the end of the spring. The receiving groove is connected to the pressure stabilizing chamber, and the sealing rubber head is pressed against and sealed against the end of the first through hole facing the pressure stabilizing chamber under the elastic force of the spring.

[0018] By adopting the above technical solution, the sealing head presses against and seals the end of the first through hole facing the pressure stabilizing chamber under the action of the spring force. Under normal circumstances, it can prevent liquid from flowing into the pressure stabilizing chamber from the drain channel, ensuring normal drainage of the water pump. When the pressure is abnormal, it can open the pressure relief in time, effectively avoiding the problem of continuous pressure rise and instability.

[0019] Preferably, the power mechanism includes a base connected to the connector, a diaphragm disposed in the inner cavity, and a drive member for driving the eccentric wheel to rotate. The inner cavity is opened on one side facing the base, the diaphragm covers the opening of the inner cavity, and the drive member is used to reciprocate to push and pull the diaphragm in the direction of the inner cavity to drive the diaphragm to reciprocate to compress and release the inner cavity space.

[0020] By adopting the above technical solution, the base of the power mechanism is connected to the connector, and the inner cavity opening is covered with a diaphragm. The drive unit drives the eccentric wheel to rotate, which drives the diaphragm to reciprocate in and out of the inner cavity, realizing the reciprocating compression and release of the inner cavity space by the diaphragm. This can change the internal pressure of the inner cavity, thereby allowing the liquid in the inlet chamber to enter the inner cavity through the second one-way valve, and then allowing the liquid in the inner cavity to enter the outlet chamber through the first one-way valve, ensuring that the water pump can realize the function of sucking in and discharging liquid, so that the liquid can flow continuously.

[0021] Preferably, the end of the connector facing the connector is provided with a mounting groove for accommodating the diaphragm, and the periphery of the diaphragm is fixed in the mounting groove.

[0022] By adopting the above technical solution, an installation groove is set at the end of the connector facing the connector to accommodate the diaphragm and fix the periphery of the diaphragm. This ensures that the diaphragm stably covers the opening of the inner cavity. When the power mechanism pushes and pulls the diaphragm back and forth in the direction of the inner cavity through the drive component, the diaphragm can stably compress and release the inner cavity space. This ensures stable control of the internal pressure of the inner cavity, and ensures that the liquid in the inlet chamber can enter the inner cavity through the second one-way valve according to the set rules. The liquid in the inner cavity can enter the drain chamber through the first one-way valve according to the set rules, thereby achieving stable liquid delivery and stable control of the internal pressure of the drain channel.

[0023] Preferably, the driving component includes an eccentric wheel rotatably connected inside the base, a connecting rod rotatably sleeved on the outer circumferential surface of the eccentric wheel, and a motor that drives the eccentric wheel to rotate, wherein the diaphragm is connected to the end of the connecting rod.

[0024] By adopting the above technical solution, the motor drives the eccentric wheel to rotate, and the eccentric wheel drives the connecting rod sleeved on its outer circumference to move, thereby enabling the diaphragm connected to the end of the connecting rod to reciprocate to compress and release the inner cavity space, realizing the function of pumping the liquid in the inlet channel to the outlet channel for discharge, thus ensuring the normal operation of the water pump.

[0025] Preferably, both the first check valve and the second check valve are umbrella valves.

[0026] By adopting the above technical solution and using umbrella valves as the first and second check valves, the flow direction of liquid between the inlet chamber, inner chamber and outlet chamber can be controlled more accurately and effectively, ensuring that the liquid flows in the predetermined direction and improving the working efficiency and stability of the water pump.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When the drain channel is blocked and the internal pressure is greater than the force value of the pressure control component, the liquid pushes open the pressure control component and flows back to the inlet channel, stabilizing the internal pressure of the drain channel and solving the problem of unstable pressure rise due to blockage at the water pump outlet.

[0029] 2. To prevent continuous pressure rise due to blockage of the drainage channel, reduce product failures, and improve product performance;

[0030] 3. By setting up pressure control components and corresponding channels, the water pump structure is simplified and manufacturing costs are reduced. Attached Figure Description

[0031] Figure 1This is a schematic diagram of the external structure of a high-pressure piston water pump with pressure stabilization function according to an embodiment of this application.

[0032] Figure 2 This is an exploded schematic diagram of a high-pressure piston water pump with pressure stabilization function according to an embodiment of this application.

[0033] Figure 3 This is a schematic diagram of one end face of the connector in a high-pressure piston water pump with pressure stabilization function according to an embodiment of this application (the arrow indicates the direction of partial liquid flow when the water pump is blocked at the drain end).

[0034] Figure 4 This is a schematic diagram of the other end face of the connector in a high-pressure piston water pump with pressure stabilization function according to an embodiment of this application.

[0035] Figure 5 This is a schematic diagram of the liquid flow direction between the two end faces of the connector in a high-pressure piston water pump with a pressure stabilizing function according to an embodiment of this application (the arrows indicate the liquid flow direction under normal drainage conditions).

[0036] Figure 6 This is a front view of a high-pressure piston water pump with pressure stabilization function according to an embodiment of this application.

[0037] Figure 7 yes Figure 6 Cross-sectional view along the AA direction.

[0038] Figure 8 yes Figure 6 Cross-sectional view in the EE direction.

[0039] This application provides an embodiment of a high-pressure piston water pump with a pressure stabilizing function.

[0040] Explanation of reference numerals in the attached drawings: 1. Connector; 11. First check valve; 12. Second check valve; 14. Inner cavity; 15. Side cover; 2. Base; 21. Mounting groove; 3. Drive component; 31. Motor; 32. Connecting rod; 33. Ball bearing; 34. Eccentric wheel; 4. Pressure control assembly; 41. Mounting seat; 42. Sealing head; 43. Spring; 44. Threaded cap; 5. Drainage channel; 51. Drainage chamber; 52. Drainage pipe; 53. First through hole; 6. Inlet channel; 61. Inlet chamber; 62. Inlet pipe; 63. Second through hole; 7. Diaphragm. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0042] This application discloses a high-pressure piston water pump with pressure stabilization function, referring to... Figure 1It includes a connector 1, a power mechanism and a pressure control component 4. The connector 1 is provided with an inlet channel 6, an outlet channel 5 and a pressure stabilizing chamber 13. The pressure stabilizing chamber 13 and the outlet channel 5 are connected by a first through hole 53 and the pressure stabilizing chamber 13 and the inlet channel 6 are connected by a second through hole 63. The power mechanism is connected to the connector 1 and is used to pump the liquid in the inlet channel 6 to the outlet channel 5 for discharge. The pressure control component 4 is set at the connector 1 and uses elastic clamping to block the first through hole 53. The elastic force of the pressure control component 4 is consistent with the discharge direction of the outlet pipe 52. In this way, when the outlet channel 5 is blocked and the internal pressure of the outlet channel 5 is greater than the force of the pressure control component 4, the liquid in the outlet channel 5 can push open the pressure control component 4 and enter the pressure stabilizing chamber 13, and then flow back into the inlet channel 6 through the second through hole 63. This achieves the effect of stabilizing the internal pressure of the outlet channel 5, avoiding the situation where the pressure continues to rise and become unstable due to the blockage of the outlet channel 5, and effectively improving the performance of the water pump.

[0043] Specifically, the drain channel 5 includes a drain chamber 51 located inside the connector 1 and a drain pipe 52 located outside the connector 1. The inlet channel 6 includes an inlet chamber 61 located inside the connector 1 and an inlet pipe 62 located inside the connector 1. The drain chamber 51 and inlet chamber 61 are arranged side-by-side and can be considered as spaces for temporary storage and flow of liquid within the connector 1. The drain pipe 52 and inlet pipe 62 are responsible for the discharge and inflow of liquid, respectively. The drain chamber 51 and inlet chamber 61 are generally cavity structures formed on the main body of the connector 1 by casting or machining. The drain pipe 52 and inlet pipe 62 can be integrally formed with the connector 1 or connected to the connector 1 by welding, threaded connection, or other methods. A first through hole 53 connects the drain chamber 51 and the pressure stabilizing chamber 13, and a second through hole 63 connects the inlet chamber 61 and the pressure stabilizing chamber 13. These through holes ensure the flow of liquid between the different cavities. In this embodiment, a side cover 15 is installed on the side of the connector 1 to seal the side openings of the drain chamber 51, the inlet chamber 61 and the pressure stabilizing chamber 13. The side cover 15 and the connector 1 are sealed by a sealing ring.

[0044] In this embodiment, the connector 1 has an inner cavity 14. A first check valve 11 is installed between the inner cavity 14 and the drain cavity 51, and a second check valve 12 is installed between the inner cavity 14 and the inlet cavity 61. The first check valve 11 and the second check valve 12 control the flow direction of the liquid in opposite directions. The check valves play a crucial role in controlling the unidirectional flow of the liquid, ensuring that the liquid can only flow in a specific direction between the cavities. Taking an umbrella valve as an example, when the liquid flows in the permitted direction, the umbrella of the umbrella valve is pushed open, and the liquid passes smoothly; when the liquid attempts to flow in the opposite direction, the umbrella tightly fits against the valve seat, preventing backflow. This structure is simple and reliable, effectively preventing liquid backflow and ensuring the normal operation of the water pump.

[0045] In this embodiment, the power mechanism includes a base 2 connected to the connector 1, a diaphragm 7 disposed in the inner cavity 14, and a drive member 3 for driving the diaphragm 7. The inner cavity 14 has an opening on the side facing the base 2, and the diaphragm 7 covers the opening of the inner cavity 14. The drive member 3 is used to reciprocate to push and pull the diaphragm 7 in the direction of the inner cavity 14, thereby driving the diaphragm 7 to reciprocate to compress and release the space in the inner cavity 14. The base 2 adopts a structure with certain strength and stability, which provides support and a mounting base for the entire power mechanism. The base 2 can be made of metal materials such as aluminum alloy or steel, or high-strength plastic materials to reduce weight and cost. The side of the base 2 facing the connector 1 has a mounting groove 21 that matches the shape of the diaphragm 7. The diaphragm 7 is fixed around the periphery in the mounting groove 21. The diaphragm 7 is generally made of a material with certain elasticity and flexibility, such as rubber or silicone, so that it can achieve reciprocating motion under the action of the drive member 3. The diaphragm 7 covers the opening of the inner cavity 14, forming a relatively sealed space. When the diaphragm 7 reciprocates, it can continuously change the size of the inner cavity 14, causing pressure changes in the inner cavity 14, thereby achieving continuous intake and discharge of liquid.

[0046] In this embodiment, the driving component 3 includes an eccentric wheel 34 rotatably connected to the internal cavity of the base 2, a connecting rod 32 rotatably sleeved on the outer circumference of the eccentric wheel 34, and a motor 31 that drives the eccentric wheel 34 to rotate. The motor 31 is mounted on the outside of the base 2, and the output shaft of the motor 31 passes through the internal cavity of the base 2 and is coaxially and fixedly connected to the eccentric wheel 34. The eccentric wheel 34 is a circular part whose center does not coincide with the center of rotation. When the motor 31 drives the eccentric wheel 34 to rotate, the eccentric motion of the eccentric wheel 34 is converted into the reciprocating motion of the connecting rod 32. One end of the connecting rod 32 is a ring sleeve, and the other end is a straight rod. The ring sleeve of the connecting rod 32 is sleeved on the outer circumference of the eccentric wheel 34, and a ball bearing 33 is provided between the eccentric wheel 34 and the ring sleeve of the connecting rod 32 to achieve the purpose of relative rotation between the two. The end of the straight rod of the connecting rod 32 is threadedly connected to the middle of the diaphragm 7. This connection allows the motion of the connecting rod 32 to be directly transmitted to the diaphragm 7, converting the circular motion of the eccentric wheel 34 into the reciprocating motion of the diaphragm 7. This enables the compression and release of the space within the inner cavity 14.

[0047] In this embodiment, the pressure control assembly 4 includes a mounting base 41 disposed outside the connector 1, a receiving groove disposed inside the mounting base 41, a spring 43 disposed inside the receiving groove, and a sealing head 42 fixed to the end of the spring 43. The receiving groove communicates with the pressure stabilizing chamber 13. The sealing head 42, under the elastic force of the spring 43, presses against and seals the end of the first through hole 53 facing the pressure stabilizing chamber 13. The mounting base 41 is a structure for mounting other components of the pressure control assembly 4. It is usually fixed to the outside of the connector 1 by bolts, welding, etc. A threaded cap 44 is installed at the end of the mounting base 41 away from the connector 1 to close one end of the receiving groove. The receiving groove is a space machined inside the mounting base 41 to accommodate the spring 43 and the sealing head 42. The spring 43 is generally a helical spring 43, which has a certain elastic coefficient and can provide stable elastic force. The sealing head 42 is usually made of materials with good sealing properties such as rubber. Under the action of the spring 43, it can tightly seal the first through hole 53 to prevent liquid from flowing into the pressure stabilizing chamber 13 under normal conditions.

[0048] When the drain channel 5 becomes blocked, the pressure inside the drain channel 5 gradually increases. When the pressure inside the drain channel 5 exceeds the force of the pressure control component 4, that is, exceeds the elastic force of the spring 43, the liquid inside the drain channel 5 will overcome the elastic force of the spring 43 and push open the sealing head 42. At this time, the liquid enters the pressure stabilizing chamber 13 through the first through hole 53, and then flows back into the inlet channel 6 through the second through hole 63. In this way, the pressure inside the drain channel 5 will not continue to rise, but will remain in a relatively stable state, thus realizing the pressure stabilization function of the water pump.

[0049] The implementation principle of this embodiment is as follows: This embodiment cleverly designs the structure of the connector 1, setting up an inlet channel 6, a drain channel 5, a pressure stabilizing chamber 13, and corresponding through holes, and is equipped with a power mechanism and a pressure control component 4. The power mechanism, through the cooperation of the eccentric wheel 34, connecting rod 32, and diaphragm 7, realizes the reciprocating compression and release of the space in the inner cavity 14, thereby completing the suction and discharge of liquid. The one-way valve ensures the unidirectional flow of liquid, improving the working efficiency and reliability of the water pump. The pressure control component 4 plays a key role when the drain channel 5 is blocked. Through the cooperation of the spring 43 and the sealing head 42, it automatically adjusts the pressure in the drain channel 5 to keep it stable. Compared with the prior art, the water pump structure of this embodiment is relatively simple and the cost is low. At the same time, it can effectively solve the problem of unstable pressure rise when the drain channel 5 is blocked, greatly improving the performance and applicability of the water pump. Whether in industrial production or daily life applications, it can better meet the needs of users.

[0050] Example 2

[0051] The difference between this embodiment and the previous embodiment is that the spring 43 of the pressure control component 4 can be a disc spring instead of a common helical spring. Disc springs have advantages such as small size, high load-bearing capacity, and high stiffness, and can provide greater elastic force in a smaller space. Moreover, the characteristic curve of the disc spring can be designed and adjusted according to actual needs, and can better adapt to different pressure control requirements. During installation, the disc spring is also placed in the receiving groove inside the mounting base 41, with its end still pressing against the sealing head 42. Under normal circumstances, its own elasticity makes the sealing head 42 press against and seal the end of the first through hole 53 facing the pressure stabilizing chamber 13. When the drain channel 5 is blocked and the pressure rises, the liquid will also push open the sealing head 42, the disc spring will be compressed, the liquid enters the pressure stabilizing chamber 13 and flows back to the inlet channel 6, realizing the pressure stabilizing function.

[0052] The implementation principle of this embodiment is as follows: Replacing the helical spring with a disc spring provides greater elasticity within a limited space, making the structure of the pressure control component 4 more compact. Furthermore, the characteristic curve of the disc spring can be optimized according to specific application scenarios, enabling more precise pressure control and improving the accuracy and stability of pressure control. This is of great significance for applications requiring high pressure stability, such as high-precision industrial production equipment and high-end coffee machines, further enhancing the performance and applicability of the water pump and reducing potential equipment failures and product quality issues caused by pressure instability.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-pressure piston water pump with pressure stabilization function, characterized in that: include: A connector (1) is provided with an inlet channel (6), a drain channel (5) and a pressure stabilizing chamber (13). A first through hole (53) is connected between the pressure stabilizing chamber (13) and the drain channel (5), and a second through hole (63) is connected between the pressure stabilizing chamber (13) and the inlet channel (6). A power mechanism is used to pump the liquid in the inlet channel (6) to the outlet channel (5) for discharge; Pressure control component (4), wherein the pressure control component (4) uses elastic clamping to block the first through hole (53), and the elastic force direction of the pressure control component (4) is consistent with the drainage direction of the drainage pipe (52); When the drain channel (5) is blocked and the pressure inside the drain channel (5) is greater than the pressure control component (4), the liquid in the drain channel (5) pushes open the pressure control component (4) and enters the pressure stabilizing chamber (13), and flows back into the inlet channel (6) through the second through hole (63) to stabilize the pressure inside the drain channel (5).

2. A high-pressure piston water pump with pressure stabilization function according to claim 1, characterized in that: The drain channel (5) includes a drain chamber (51) disposed inside the connector (1) and a drain pipe (52) disposed outside the connector (1). The inlet channel (6) includes an inlet chamber (61) disposed inside the connector (1) and an inlet pipe (62) disposed inside the connector. The first through hole (53) connects the drain chamber (51) and the pressure stabilizing chamber (13), and the second through hole (63) connects the inlet chamber (61) and the pressure stabilizing chamber (13).

3. A high-pressure piston water pump with pressure stabilization function according to claim 2, characterized in that: The connector (1) has an inner cavity (14) inside. A first check valve (11) is provided between the inner cavity (14) and the drain cavity (51), and a second check valve (12) is provided between the inner cavity (14) and the inlet cavity (61). The first check valve (11) and the second check valve (12) control the flow direction of the liquid in opposite directions. The power mechanism controls the internal pressure of the inner cavity (14) by reciprocatingly squeezing the space of the inner cavity (14). When the pressure of the inner cavity (14) is less than the external atmospheric pressure, the liquid in the inlet cavity (61) enters the inner cavity (14) through the second check valve (12). When the pressure of the inner cavity (14) is greater than the external atmospheric pressure, the liquid in the inner cavity (14) enters the drain cavity (51) through the first check valve (11).

4. A high-pressure piston water pump with pressure stabilization function according to claim 1, characterized in that: The pressure control assembly (4) includes a mounting base (41) disposed outside the connector (1), a receiving groove disposed inside the mounting base (41), a spring (43) disposed inside the receiving groove, and a sealing head (42) disposed at the end of the spring (43). The receiving groove is connected to the pressure stabilizing chamber (13). The sealing head (42) is pressed against and blocks the end of the first through hole (53) facing the pressure stabilizing chamber (13) under the elastic force of the spring (43).

5. A high-pressure piston water pump with pressure stabilization function according to claim 1, characterized in that: The power mechanism includes a base (2) connected to the connector (1), a diaphragm (7) disposed in the inner cavity (14), and a drive member (3) for driving the diaphragm (7). The inner cavity (14) is open on one side facing the base (2). The diaphragm (7) covers the opening of the inner cavity (14). The drive member (3) is used to reciprocate pushing and pulling the diaphragm (7) in the direction of the inner cavity (14) to drive the diaphragm (7) to reciprocate to compress and release the space of the inner cavity (14).

6. A high-pressure piston water pump with pressure stabilization function according to claim 5, characterized in that: The base is provided with a mounting groove (21) for accommodating the diaphragm (7) at one end facing the connector (1), and the diaphragm (7) is fixed in the mounting groove (21) around its periphery.

7. A high-pressure piston water pump with pressure stabilization function according to claim 5, characterized in that: The driving component (3) includes an eccentric wheel (34) rotatably connected inside the base (2), a connecting rod (32) rotatably sleeved on the outer circumferential surface of the eccentric wheel (34), and a motor (31) that drives the eccentric wheel (34) to rotate. The diaphragm (7) is connected to the end of the connecting rod (32).

8. A high-pressure piston water pump with pressure stabilization function according to claim 3, characterized in that: Both the first check valve (11) and the second check valve (12) are umbrella valves.

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