A single plunger supercharging device

Abstract

The utility model discloses a single plunger pressure increasing device belongs to pressure increasing device field, has solved the problem that the pressure pump cannot adjust internal water pressure, and the technical scheme of solving this problem mainly includes the switch subassembly of valve body and valve body connection, forms the flow channel in the valve body, and the flow channel is connected with the water inlet pipeline, the water outlet pipeline and the overflow pipeline, and the valve body is equipped with overflow subassembly and piston subassembly, piston subassembly includes the piston rod that reciprocates in the flow channel and the driver of drive piston rod, and the flow channel is equipped with the check valve at the place close to the water inlet pipeline, and the piston rod movement acts on the water flow through the check valve and is the water flow pressure increasing, and overflow subassembly acts to make overflow pipeline and flow channel communicate or insulate, after overflow pipeline and flow channel communicate, overflow subassembly triggers switch subassembly to shut down the driver. The utility model is mainly used for preventing water pressure too low or too high.

Description

Technical Field

[0001] This utility model discloses a single plunger booster device, belonging to the technical field of booster devices. Background Technology

[0002] Booster pumps are common gardening tools, typically used to connect to high-pressure water guns and provide them with a high-pressure water flow. Existing booster pumps are generally large and heavy, making them inconvenient to carry and affecting the use and cleaning range of the high-pressure gun. Furthermore, some booster pumps have inlet valves linked to the trigger of the handheld gun; the booster pump only starts pressurizing when the trigger is open. When the trigger is closed, the booster pump stops working to prevent continuous pressurization. However, if the pump remains under high pressure, it can prevent the handheld gun from opening properly, or even cause the handheld gun or pump itself to explode, posing a significant safety hazard. Utility Model Content

[0003] The purpose of this invention is to solve the problem that booster pumps cannot adjust internal water pressure. To this end, a single-plunger booster device is provided to maintain a certain water pressure in the booster valve and prevent the water pressure from being too low or too high.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A single-plunger pressurization device includes a valve body connected to a switching assembly. A flow channel is formed within the valve body, which connects to an inlet pipe, an outlet pipe, and an overflow pipe. The valve body is equipped with an overflow assembly and a piston assembly. The piston assembly includes a piston rod that reciprocates within the flow channel and a driver that drives the piston rod. A one-way valve is provided near the inlet pipe in the flow channel. The movement of the piston rod acts on the water flow passing through the one-way valve to pressurize the water flow. The overflow assembly actuates to connect or disconnect the overflow pipe from the flow channel. After the overflow pipe connects with the flow channel, the overflow assembly triggers the switching assembly to shut off the driver.

[0005] The beneficial effects of using this utility model are: The valve body described in this invention includes a piston assembly and an overflow assembly. The piston assembly comprises a driver and a piston rod. The overflow assembly is movably installed within the valve body. A one-way valve is located near the inlet pipe in the flow channel. Water flows through the inlet pipe and passes through the one-way valve into the flow channel. The piston rod reciprocates within the flow channel, thereby pressurizing the water flow passing through the one-way valve. The piston rod's proximity to the inlet pipe allows for rapid pressurization of the water flow entering the pump body, improving the pressurization efficiency of the pressurizing device. Furthermore, the one-way valve at the inlet pipe prevents the water flow from flowing back into the inlet pipe, ensuring that the water flow continues smoothly to the outlet pipe during pressurization, enabling the pressurizing device to provide high-pressure water to the high-pressure gun. Additionally, when the high-pressure gun is closed, the water pressure inside the pressurizing device continues to increase under the action of the piston assembly, reaching a certain pressure. After a certain point, the overflow valve will activate, connecting the overflow pipe to the flow channel. Water from the booster will flow out through the overflow pipe, reducing the water pressure in the flow channel. Simultaneously, the overflow component will trigger the switching component to shut down the actuator, preventing the piston component from continuing to pressurize. This ensures that the water pressure in the flow channel is significantly lower than its operating pressure, reducing the burden on the valve body from high water pressure. This can greatly extend the valve body's service life, reduce the requirements for valve body materials, and prevent the valve body from bursting due to high-pressure water, reducing the risk of using the booster and improving safety. Furthermore, when the water pressure in the flow channel drops to a certain level, the overflow component will automatically close, isolating the flow channel from the overflow pipe. This allows some water pressure to be retained in the flow channel, providing initial water pressure for the next high-pressure gun firing. This ensures that the high-pressure gun has sufficient water pressure when firing, effectively improving its cleaning efficiency.

[0006] Preferably, the flow channel includes a first channel, one end of which is connected to the inlet pipe. A one-way valve is sealed and installed at the end of the first channel near the inlet pipe, and a piston rod is slidably disposed within the first channel. Using the aforementioned technical solution, water flows directly into the first channel after passing through the one-way valve. By placing the piston rod within the first channel, the water flow can be quickly pressurized in the first channel, effectively improving the pressurization effect of the piston rod.

[0007] Preferably, the flow channel further includes a second channel, in which the overflow assembly is installed. A third channel connects the first and second channels and is connected to the side wall of the first channel. Using the aforementioned technical solution, a one-way valve is located at the end of the first channel, allowing water to flow axially along the first channel after passing through the one-way valve. By placing the third channel on the side wall of the first channel, water flow is prevented from flowing directly to the third channel after passing through the one-way valve, ensuring that the water remains within the first channel for pressurization by the piston rod.

[0008] Preferably, the one-way valve has an inlet and an outlet, and the connection point between the third channel and the first channel is located between the inlet and the outlet. By adopting the aforementioned technical solution, the third channel is located upstream of the outlet, further reducing the possibility of water flowing directly into the third channel after leaving the outlet. This increases the residence time of the water in the first channel, thereby effectively improving the pressurization effect of the piston rod.

[0009] Preferably, the piston rod has an annular groove on its outer periphery, and a sealing element is fitted into the annular groove. The outer periphery of the sealing element maintains a sealing fit with the inner wall of the first channel. Using the aforementioned technical solution, the sealing element can effectively maintain the seal between the piston rod and the inner wall of the first channel, enabling the piston rod to pressurize the water flow within the first channel.

[0010] Preferably, the inner wall of the first channel is provided with an installation groove, in which a seal and a support are installed. The support and the seal abut against each other to form axial positioning. Both the seal and the support are fitted onto the piston rod, and the inner side wall of the seal is sealed to the outer side wall of the piston rod.

[0011] Preferably, the overflow assembly includes a valve sleeve fixed to the valve body and an overflow valve core that slides with the valve sleeve. The overflow valve core has a sealing section that seals with the valve sleeve. The overflow valve core is elastically loaded so that it tends to maintain a sealing fit with the valve sleeve. The overflow valve core slides due to water pressure to release the sealing fit with the valve sleeve and trigger the switching assembly.

[0012] Preferably, the valve sleeve is provided with a sliding push rod, which is elastically loaded to tend to resist the overflow valve core. The end of the push rod away from the overflow valve core extends into the switch assembly, which includes a safety switch. The overflow valve core pushes the push rod close to the safety switch to trigger the safety switch.

[0013] Preferably, a cavity is formed between the end of the overflow valve core away from the valve sleeve and the end of the second channel. The outer wall of the overflow valve core is sealed to the inner wall of the second channel. The water outlet pipe is provided with a connecting channel communicating with the cavity. Water flows into the cavity to increase the water pressure in the cavity to provide the power for the overflow valve core to slide.

[0014] Preferably, the flow channel further includes a second channel, an overflow component installed in the second channel, an inlet of the outlet pipe connected to the second channel, a pressure-holding component installed in the outlet pipe, the pressure-holding component sealing the inlet after the outlet of the outlet pipe is closed, a pressure relief channel connecting the second channel and the outlet pipe installed in the pressure-holding component, a pressure relief valve installed in the pressure relief channel, the pressure relief valve only allowing water to flow from the outlet pipe through the pressure relief channel to the second channel.

[0015] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings: Figure 1 is an exploded view of a single plunger booster device and a high-pressure gun according to this utility model; Figure 2 This is a cross-sectional view of a single-plunger booster device according to the present invention; Figure 3 is Figure 2 A magnified view of part A in the middle.

[0017] Reference numerals: 1. Pump body; 11. Inlet pipe; 12. Outlet pipe; 13. Flow channel; 131. First channel; 132. Second channel; 133. Third channel; 134. Connecting channel; 135. Cavity; 21. Driver; 22. Piston rod; 23. Seal; 24. Support; 3. Check valve; 31. Inlet; 32. Outlet; 41. Valve sleeve; 42. Overflow valve core; 43. First elastic element; 44. Push rod; 45. Second elastic element; 5. Switch assembly; 6. Pressure holding assembly; 61. Pressure relief channel; 621. Pressure relief valve; 622. Third elastic element; 7. High-pressure gun; 71. Trigger; 72. Connecting end. Detailed Implementation

[0018] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Example 1: As shown in Figures 1 to 3, this embodiment illustrates a single-plunger pressurization device, including a valve body and a switching assembly 5 connected to the valve body. A flow channel 13 is formed inside the valve body, and the flow channel 13 is connected to an inlet pipe 11, an outlet pipe 12, and an overflow pipe. The valve body is provided with an overflow assembly and a piston assembly. The piston assembly includes a piston rod 22 that reciprocates within the flow channel 13 and a driver 21 that drives the piston rod 22. A one-way valve 3 is provided near the inlet pipe 11 in the flow channel 13. The movement of the piston rod 22 acts on the water flow passing through the one-way valve 3 to pressurize the water flow. The overflow assembly actuates to connect or disconnect the overflow pipe from the flow channel 13. After the overflow pipe connects with the flow channel 13, the overflow assembly triggers the switching assembly 5 to shut off the driver 21.

[0022] In this embodiment, the valve body is equipped with a piston assembly and an overflow assembly. The piston assembly includes a driver 21 and a piston rod 22. The overflow assembly is movably installed within the valve body. A one-way valve 3 is provided near the inlet pipe 11 in the flow channel 13. Water flows through the inlet pipe 11 and passes through the one-way valve 3 into the flow channel 13. The piston rod 22 reciprocates within the flow channel 13, thereby pressurizing the water flow passing through the one-way valve 3. The piston rod 22's proximity to the inlet pipe 11 allows for rapid pressurization of the water flow entering the pump body 1, which helps improve the pressurization efficiency of the pressurization device. Additionally, the one-way valve 3 at the inlet pipe 11 pressurizes the water flow passing through the one-way valve 3. The one-way valve 3 prevents the water flow from flowing back into the inlet pipe 11, ensuring that the water flow can still smoothly flow to the outlet pipe 12 during the pressurization process, enabling the pressurization device to provide high-pressure water to the high-pressure gun 7. Furthermore, when the high-pressure gun 7 is closed, the water pressure inside the pressurization device will remain constant under the action of the piston assembly. As the pressure continues to increase, once it reaches a certain level, it will activate the overflow valve, connecting the overflow pipe to the flow channel 13. The water in the booster device will flow out through the overflow pipe, thereby reducing the water pressure in the flow channel 13. At the same time, the overflow component will also trigger the switch component 5 to shut down the driver 21, preventing the piston component from continuing to pressurize, so that the water pressure in the flow channel 13 is much lower than the water pressure during operation, reducing the burden of high water pressure on the valve body, significantly extending the service life of the valve body, reducing the requirements for the valve body material, and also preventing the valve body from bursting due to high-pressure water, reducing the risk of using the booster device, and improving the safety of use. Furthermore, when the water pressure in the flow channel 13 drops to a certain level, the overflow component will automatically close, isolating the flow channel 13 from the overflow pipe, thereby allowing some water pressure to be retained in the flow channel 13, providing initial water pressure for the high-pressure gun 7 to be fired next time, so that the high-pressure gun 7 can have a large water pressure when it is fired, which can effectively improve the cleaning efficiency of the high-pressure gun 7.

[0023] like Figure 2As shown in Figure 3, the flow channel 13 in this embodiment includes a first channel 131, a second channel 132, and a third channel 133. One end of the first channel 131 is connected to the inlet pipe 11, the second channel 132 is connected to the outlet pipe 12, and the third channel 133 is located between the first channel 131 and the second channel 132, keeping the first channel 131 and the second channel 132 connected. Additionally, the one-way valve 3 is located at the end of the first channel 131 connected to the inlet pipe 11, the piston assembly is located at the other end of the first channel 131, and the third channel 133 is located on the side wall of the first channel 131. After passing through the one-way valve 3, the water flows directly into the first channel 131. The piston rod 22 is placed in the first channel 131, which can quickly pressurize the water flow in the first channel 131 and effectively improve the pressurization effect of the piston rod 22. In addition, the one-way valve 3 is placed at the end of the first channel 131. After passing through the one-way valve 3, the water flows along the axial direction of the first channel 131. The third channel 133 is placed on the side wall of the first channel 131, which can prevent the water flow from flowing directly to the third channel 133 after passing through the one-way valve 3, and ensure that the water flow can stay in the first channel 131 for the piston rod 22 to pressurize.

[0024] Specifically, in this embodiment, the one-way valve 3 has an inlet 31 and an outlet 32. The inlet 31 is located at the end of the one-way valve 3 facing the inlet pipe 11, and the outlet 32 ​​is located at the other end of the one-way valve 3 away from the inlet pipe 11. After the water flows through the inlet 31 and outlet 32 ​​of the one-way valve 3, it flows into the first channel 131. Since the flow direction of the outlet 32 ​​is parallel to the axial direction of the first channel 131, after the water leaves the outlet 32, the flow direction of the water is parallel to the axial direction of the first channel 131, that is, the water will flow towards the piston rod 22, avoiding the water from flowing directly towards the first channel 131. The third channel 133 on the side wall of the first channel 131 can increase the residence time of water in the first channel 131, so that the piston rod 22 can increase the water flow in the first channel 131. In addition, the connection position of the third channel 133 and the first channel 131 is between the inlet 31 and the outlet 32. The third channel 133 is upstream of the outlet 32, which further reduces the possibility that the water flow will directly enter the third channel 133 after leaving the outlet 32. This can increase the residence time of water in the first channel 131, thereby effectively improving the pressurization effect of the piston rod 22.

[0025] Regarding the piston assembly, in this embodiment, the driver 21 is a drive motor, which is fixed to the valve body. The output end of the drive motor is provided with a connecting rod that is connected to the piston rod 22. The drive motor drives the connecting rod to rotate, and the connecting rod drives the piston rod 22 to reciprocate along the axial direction of the first channel 131. The piston rod 22 moves to change the volume of the first channel 131, thereby pressurizing the water flow in the first channel 131.

[0026] like Figure 2 As shown, in this embodiment, the inner wall of the first channel 131 is provided with an installation groove, in which a sealing element 23 and a support element 24 are installed. The support element 24 abuts against the sealing element 23 to form axial positioning. Both the sealing element 23 and the support element 24 are fitted onto the piston rod 22. The inner side wall of the sealing element 23 is sealed to the outer side wall of the piston rod 22. The sealing element 23 can effectively maintain the sealing between the piston rod 22 and the inner wall of the first channel 131, so that the piston rod 22 can pressurize the water flow in the first channel 131.

[0027] It is understandable that in other embodiments, the outer periphery of the piston rod 22 may also be provided with an annular groove, and the annular groove is fitted with a seal 23, the outer periphery of the seal 23 maintaining a sealing fit with the inner wall of the first channel 131.

[0028] like Figure 2 As shown, in this embodiment, the overflow assembly is disposed within the second channel 132. The overflow assembly includes a valve sleeve 41 fixed within the valve body and an overflow valve core 42 that slides with the valve sleeve 41. The overflow valve core 42 has a sealing section that seals with the valve sleeve 41. A first elastic element 43 is fitted onto the overflow valve core 42. The overflow valve core 42 is elastically loaded by the first elastic element 43, so that the overflow valve core 42 tends to maintain a sealing fit between the sealing section and the valve sleeve 41. Specifically... Figure 2 In the middle, the sealing section is located at the right end of the overflow valve core 42. The first elastic element 43 acts on the overflow valve core 42, causing the overflow valve core 42 to have a tendency to move to the left. When the overflow valve core 42 moves to the leftmost end, the sealing section and the valve sleeve 41 are sealed together, thereby keeping the valve sleeve 41 sealed. The overflow channel is connected to the inner side of the valve sleeve 41. When the sealing section and the valve sleeve 41 are sealed together, the flow channel 13 and the overflow channel are isolated by the valve sleeve 41, thereby preventing water from flowing directly out of the valve body through the overflow channel. When the overflow valve core 42 moves, the valve sleeve 41 is opened, and the flow channel 13 is connected to the overflow channel. The water in the flow channel 13 flows out of the valve body through the overflow channel, thereby reducing the water pressure in the flow channel 13.

[0029] Additionally, the overflow assembly also includes a push rod 44 slidably disposed within the valve sleeve 41. The push rod 44 is fitted with a second elastic element 45, and the push rod 44 is elastically loaded by the second elastic element 45, causing the push rod 44 to tend to abut against the overflow valve core 42. Specifically, the second elastic element 45 acts on the push rod 44, causing the push rod 44 to have a tendency to slide to the left and abut against the overflow valve core 42. Next, the switch assembly 5 is connected to the valve body. The end of the push rod 44 away from the overflow valve core 42 extends into the switch assembly 5. The switch assembly 5 includes a housing and a safety switch installed in the housing. The button of the safety switch is opposite to the push rod 44. When the overflow valve core 42 slides and opens the valve sleeve 41, the overflow valve core 42 will also push the push rod 44 to slide to the right. When the push rod 44 abuts against the button of the safety switch, the safety switch is triggered, and the safety switch will send an electrical signal to the driver 21 to shut down the driver 21.

[0030] like Figure 2 As shown, in this embodiment, the inlet of the water outlet pipe 12 is connected to the side wall of the second channel 132. Water flows into the water outlet pipe 12 through the second channel 132. A pressure-holding component 6 is provided inside the water outlet pipe 12. The pressure-holding component 6 is elastically loaded so that the pressure-holding component 6 tends to move towards the inlet of the water outlet pipe 12. When the pressure-holding component 6 moves to the inlet of the water outlet pipe 12 and abuts against the inner side of the water outlet pipe 12, the pressure-holding component 6 will maintain a sealed fit with the water outlet pipe 12, thereby preventing water from entering the water outlet pipe 12 from the inlet.

[0031] In addition, in this embodiment, a cavity 135 is formed between the end of the overflow valve core 42 away from the valve sleeve 41 and the end of the second channel 132. The outer wall of the overflow valve core 42 is sealed to the inner wall of the second channel 132. The water outlet pipe 12 is provided with a connecting channel 134 that communicates with the cavity 135. The water flow in the water outlet pipe 12 can flow into the cavity 135 at the end of the overflow valve core 42 through the connecting channel 134. When the pressure holding component 6 blocks the water outlet pipe 12, the cavity 135 at the end of the overflow valve core 42 will be isolated from the flow channel 13 on the other side of the overflow valve core 42, thereby forming a pressure difference at both ends of the overflow valve core 42 to provide power for the sliding of the overflow valve core 42.

[0032] Specifically, in this embodiment, the pressure holding component 6 includes a pressure holding valve. The pressure holding valve has a pressure relief channel 61 that connects the second channel 132 and the water outlet pipe 12. The pressure relief channel 61 has a pressure relief valve 621. The pressure relief valve 621 is fitted with a third elastic element 622. The third elastic element 622 acts on the pressure relief valve 621 to keep the pressure relief valve 621 away from the inlet of the water outlet pipe 12 and to block the end of the pressure relief channel 61 away from the water outlet pipe 12, so that the water can only flow from the water outlet pipe 12 through the pressure relief channel 61 to the second channel 132.

[0033] The usage of this embodiment is as follows: Before use, the connection end 72 of the high-pressure gun 7 is sealed and connected to the outlet pipe 12 of the booster device. The inlet pipe 11 of the booster device is connected to the water supply device. The water supply device supplies water to the booster device and simultaneously acts as the driver 21 of the piston assembly. The water flows through the inlet pipe 11 into the flow channel 13 inside the valve body. After the water flows through the one-way valve 3 into the first channel 131, the water is pressurized under the action of the piston rod 22 and flows through the third channel 133 into the second channel 132. When the water pressure is increased, the water can push open the pressure holding valve and allow the water to enter the outlet pipe 12. When the user uses it, the high-pressure gun 7 can spray high-pressure water by opening the trigger 71 of the high-pressure gun 7.

[0034] When the user closes the high-pressure gun 7, the water pressure in the outlet pipe 12 will rise sharply, causing the pressure holding valve to slide downward and block the inlet of the outlet pipe 12. Since the cavity 135 at the end of the overflow valve core 42 is connected to the outlet pipe 12 through the connecting channel 134, the water pressure in the cavity 135 will also rise sharply, thus creating a pressure difference at the overflow valve core 42. When the pressure difference is greater than the force of the first elastic element 43 and the second elastic element 45, the overflow valve core 42 is pushed and slides to the right, so that the valve sleeve 41 opens. Then the overflow channel is connected to the flow channel 13, and the water flows out of the valve body through the overflow channel, causing the water pressure in the flow channel 13 to drop. At the same time, the push rod 44 triggers the safety switch, and the safety switch sends an electrical signal to shut down the driver 21. The piston assembly stops pressurizing the water flow, thus reducing the water pressure in the flow channel 13 to a safe water pressure.

[0035] As the water pressure in the flow channel 13 decreases, the pressure difference on both sides of the pressure relief valve 621 gradually increases. When the pressure difference exceeds the force of the third elastic element 622, the pressure relief valve 621 is pushed and slides downward. At this time, the pressure relief valve 621 opens the pressure relief channel 61, so that the outlet pipe 12 and the second channel 132 are connected through the pressure relief channel 61. The water in the outlet pipe 12 flows back into the second channel 132 and flows out of the valve body through the overflow channel, thereby continuously reducing the water pressure in the outlet pipe 12 until the pressure relief valve 621 is reset and the pressure relief channel 61 is blocked under the action of the third elastic element 622.

[0036] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A single-plunger booster device, characterized in that, The device includes a valve body connected to a switching assembly. A flow channel is formed within the valve body, which connects to an inlet pipe, an outlet pipe, and an overflow pipe. The valve body is equipped with an overflow assembly and a piston assembly. The piston assembly includes a piston rod that reciprocates within the flow channel and a driver that drives the piston rod. A one-way valve is located near the inlet pipe in the flow channel. The movement of the piston rod acts on the water flow passing through the one-way valve to pressurize the water flow. The overflow assembly actuates to connect or disconnect the overflow pipe from the flow channel. After the overflow pipe connects with the flow channel, the overflow assembly triggers the switching assembly to shut down the driver.

2. The single-plunger booster device according to claim 1, characterized in that, The flow channel includes a first channel, one end of which is connected to the water inlet pipe. A one-way valve is sealed and installed at the end of the first channel near the water inlet pipe, and a piston rod is slidably disposed within the first channel.

3. The single-plunger booster device according to claim 2, characterized in that, The flow channel also includes a second channel, in which an overflow component is installed. A third channel is connected between the first and second channels and is connected to the side wall of the first channel.

4. The single-plunger booster device according to claim 3, characterized in that, The one-way valve has an inlet and an outlet, and the connection between the third channel and the first channel is located between the inlet and the outlet.

5. A single-plunger booster device according to claim 2, characterized in that, The piston rod has an annular groove on its outer periphery, and a sealing element is fitted into the annular groove. The outer periphery of the sealing element maintains a sealing fit with the inner wall of the first channel.

6. The single-plunger booster device according to claim 2, characterized in that, The inner wall of the first channel is provided with an installation groove, in which a seal and a support are installed. The support and the seal abut against each other to form axial positioning. Both the seal and the support are fitted onto the piston rod, and the inner side wall of the seal is sealed to the outer side wall of the piston rod.

7. The single-plunger booster device according to claim 1, characterized in that, The overflow assembly includes a valve sleeve fixed to the valve body and an overflow valve core that slides with the valve sleeve. The overflow valve core has a sealing section that seals with the valve sleeve. The overflow valve core is elastically loaded so that it tends to maintain a sealing fit with the valve sleeve. The overflow valve core slides due to water pressure to release the sealing fit with the valve sleeve and trigger the switching assembly.

8. A single-plunger booster device according to claim 7, characterized in that, The valve sleeve is provided with a sliding push rod. The push rod is elastically loaded so that it tends to resist the overflow valve core. The end of the push rod away from the overflow valve core extends into the switch assembly. The switch assembly includes a safety switch. The overflow valve core pushes the push rod close to the safety switch to trigger the safety switch.

9. A single-plunger booster device according to claim 7, characterized in that, A cavity is formed between the end of the overflow valve core away from the valve sleeve and the end of the second channel. The outer wall of the overflow valve core is sealed to the inner wall of the second channel. The water outlet pipe is provided with a connecting channel that communicates with the cavity. Water flows into the cavity to increase the water pressure in the cavity to provide the power for the overflow valve core to slide.

10. A single-plunger booster device according to claim 1, characterized in that, The flow channel also includes a second channel, an overflow component installed in the second channel, an inlet of the outlet pipe connected to the second channel, a pressure holding component installed in the outlet pipe, the pressure holding component sealing the inlet after the outlet of the outlet pipe is closed, a pressure relief channel connecting the second channel and the outlet pipe installed in the pressure holding component, a pressure relief valve installed in the pressure relief channel, the pressure relief valve only allowing water to flow from the outlet pipe through the pressure relief channel to the second channel.

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