A pressure regulating valve and plunger pump for a high-pressure cleaner
By introducing a buffer chamber and multi-channel design into the pressure regulating valve of the high-pressure washer, as well as a check valve core, the problem of easy damage to the valve seat is solved, achieving more stable hydraulic control and reducing water flow impact, thus improving the service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIEMUKA CLEANING EQUIP (ZHEJIANG) CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-07-17
AI Technical Summary
In existing high-pressure cleaners, the pressure regulating valve seat is easily damaged by the frequent impact force of the regulating valve core during use.
A pressure regulating valve for a high-pressure washer was designed. By setting a buffer chamber and multiple flow channels on the fixed seat, combined with a check valve core, it provides buffering force and stable hydraulic pressure, reduces instantaneous impact force, and prevents water backflow when the machine stops or the pressure drops suddenly.
It effectively reduces the possibility of valve seat damage, improves the durability and stability of the pressure regulating valve, and prevents water leakage and pressure fluctuations.
Smart Images
Figure CN224516111U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of regulating valves, and in particular to a pressure regulating valve and plunger pump for a high-pressure cleaner. Background Technology
[0002] The pressure regulating valve of a cleaning machine is a core component used to adjust the output pressure. Its function is to control the pressure of the high-pressure water flow to adapt to different cleaning scenarios. Rotating the adjusting knob compresses the spring, increasing the preload, requiring higher water pressure to push the regulating valve core, thus setting a higher output pressure; rotating the knob in the opposite direction relaxes the spring, lowering the set pressure.
[0003] However, during use, the control valve opens and closes frequently, and the valve seat is easily damaged by the impact force of the regulating valve core. Utility Model Content
[0004] To reduce the possibility of valve seat damage, this application provides a pressure regulating valve and a plunger pump for a high-pressure cleaner.
[0005] The pressure regulating valve and plunger pump of the high-pressure cleaner provided in this application adopt the following technical solution: A pressure regulating valve for a high-pressure washer includes a fixed seat, a valve stem, a regulating valve core, a valve seat, and an adjusting spring. The fixed seat has a sliding cavity with an opening diameter smaller than the inner diameter of the sliding cavity. The fixed seat also has a buffer cavity with a first flow channel communicating with the buffer cavity. The valve stem is slidably sleeved within the sliding cavity. The valve stem has a step located above the buffer cavity, with the diameter of the buffer cavity larger than the outer diameter of the step. The regulating valve core is mounted on the valve stem, and the adjusting spring is mounted on the fixed seat. The adjusting spring continuously drives the valve stem to move towards the valve seat until the regulating valve core abuts against the valve seat.
[0006] By adopting the above technical solution, and by making the diameter of the buffer chamber larger than the diameter of the step, the hydraulic force can be amplified, providing a greater buffering force for the valve stem, reducing the instantaneous impact force of the regulating valve core on the valve seat, and reducing the possibility of valve seat damage.
[0007] Preferably, it also includes a pressure regulating nut, which is threadedly connected to the fixed seat. The adjusting spring is installed inside the pressure regulating nut, and the two ends of the adjusting spring abut against the pressure regulating nut and the valve stem, respectively. The adjusting spring always drives the valve stem to slide away from the pressure regulating nut.
[0008] By adopting the above technical solution, the thread adjustment method of the pressure regulating nut allows for precise control of the spring preload.
[0009] Preferably, it also includes a fixing pad, on which a sealing pad is provided, the sealing pad abutting against the opening of the sliding cavity, and the valve stem passing through both the fixing pad and the sealing pad.
[0010] By adopting the above technical solution, the fixing pad provides radial support for the valve stem, reducing the possibility of valve stem tilting due to water flow impact or installation error, thereby reducing the possibility of local wear of valve seat or regulating valve core; the sealing pad abuts against the cavity opening of the sliding cavity, forming a dynamic sealing structure with the valve stem passing through it, preventing high-pressure water flow in the water passage cavity from leaking out of the sliding cavity.
[0011] Preferably, there are several first flow channels, and these first flow channels are evenly distributed around the buffer cavity in the circumference.
[0012] By adopting the above technical solution, the liquid is uniformly introduced into the buffer chamber through multiple first flow channels, reducing the possibility of pressure fluctuations caused by the impact of water flow in a single flow channel, making the valve stem more stable under force, and reducing the possibility that a single flow channel may be blocked by impurities, causing the buffer chamber to be unable to take in water.
[0013] A plunger pump includes a pump body and a pressure regulating valve for a high-pressure washer. The pump body has a water passage chamber, an inlet chamber, an outlet chamber, and an installation chamber that are respectively connected to the water passage chamber. The pump body also has an annular cavity and a second flow channel connecting the annular cavity and the outlet chamber. The valve seat is installed in the water passage chamber, the fixed seat is installed in the installation cavity, the sealing gasket is installed in the installation cavity, and the first flow channel is located in the annular cavity.
[0014] By adopting the above technical solution, the water flows sequentially through the main path of the inlet chamber, valve seat, water passage chamber, and outlet chamber, while simultaneously buffering the pressure on the valve stem by sequentially passing through the outlet chamber, second flow channel, annular cavity, first flow channel, and buffer chamber.
[0015] Preferably, a water outlet connector is installed on the water outlet chamber, a check valve core is slidably sleeved on the water outlet connector, and a check spring is installed on the water outlet connector. The two ends of the check spring abut against the check valve core and the water outlet connector, respectively. The check spring always drives the check valve core to move toward the inlet of the water outlet chamber until the inlet of the water outlet chamber is blocked.
[0016] By adopting the above technical solution, when the cleaning machine stops or the water pressure drops suddenly, the check spring pushes the check valve core to close the flow channel, reducing the possibility of water backflow into the outlet chamber impacting the valve seat, thereby reducing the possibility of valve seat damage.
[0017] The main technical effects of this utility model are reflected in the following aspects: 1. By making the diameter of the buffer chamber larger than the diameter of the step, this utility model can amplify the hydraulic force, provide greater buffering force for the valve stem, reduce the instantaneous impact force of the regulating valve core on the valve seat, and reduce the possibility of valve seat damage.
[0018] 2. This utility model is equipped with a check valve core. When the cleaning machine stops or the outlet water pressure drops suddenly, the check spring pushes the check valve core to close the flow channel, reducing the possibility of water backflow into the outlet chamber and impacting the valve seat, thereby reducing the possibility of damage to the valve seat. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.
[0020] Figure 2 It is along Figure 1 Enlarged view of point A in the middle.
[0021] Figure 3 This is a schematic diagram of the fixed base structure according to an embodiment of this application.
[0022] Explanation of reference numerals in the attached drawings: 1. Pump body; 11. Mounting cavity; 12. Water passage cavity; 13. Inlet cavity; 14. Outlet cavity; 15. Annular cavity; 16. Second flow channel; 2. Fixed seat; 21. Buffer cavity; 22. Sliding cavity; 23. First flow channel; 3. Valve seat; 4. Valve stem; 41. Step; 5. Adjusting valve core; 6. Adjusting spring; 7. Fixing pad; 71. Sealing pad; 8. Pressure adjusting nut; 9. Outlet connector; 91. Check valve core; 92. Check spring. Detailed Implementation
[0023] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail to make the technical solution of this application easier to understand and master.
[0024] This application discloses a pressure regulating valve and a plunger pump for a high-pressure cleaner.
[0025] Reference Figure 1 and Figure 3 The pressure regulating valve of a high-pressure washer according to this embodiment includes a fixed seat 2, a valve stem 4, an adjusting valve core 5, a valve seat 3, and an adjusting spring 6. The fixed seat 2 has a sliding cavity 22, the diameter of the opening of the sliding cavity 22 is smaller than the inner diameter of the sliding cavity 22. The fixed seat 2 has a buffer cavity 21, and the fixed seat 2 has a first flow channel 23 communicating with the buffer cavity 21. The valve stem 4 is slidably sleeved in the sliding cavity 22. The valve stem 4 has a step 41, which is located above the buffer cavity 21. The diameter of the buffer cavity 21 is larger than the outer diameter of the step 41. The adjusting valve core 5 is threadedly connected to the valve stem 4.
[0026] Reference Figure 1 and Figure 3It also includes a pressure adjusting nut 8, which is threaded onto the fixed base 2. An adjusting spring 6 is installed inside the pressure adjusting nut 8, with its two ends abutting against the pressure adjusting nut 8 and the valve stem 4, respectively. The adjusting spring 6 always drives the valve stem 4 to slide away from the pressure adjusting nut 8. The threaded adjustment method of the pressure adjusting nut 8 allows for precise control of the spring preload.
[0027] Reference Figure 1 and Figure 3 By making the diameter of the buffer chamber 21 larger than the diameter of the step 41, the hydraulic force can be amplified, providing a greater buffer force for the valve stem 4, reducing the instantaneous impact force of the regulating valve core 5 on the valve seat 3, and reducing the possibility of damage to the valve seat 3.
[0028] Reference Figure 1 and Figure 3 It also includes a fixing pad 7, on which a sealing pad 71 is fixedly connected. The sealing pad 71 abuts against the opening of the sliding cavity 22. The valve stem 4 passes through both the fixing pad 7 and the sealing pad 71. The fixing pad 7 provides radial support for the valve stem 4, reducing the possibility of the valve stem 4 tilting due to water flow impact or installation errors, thereby reducing the possibility of local wear on the valve seat 3 or the regulating valve core 5. The sealing pad 71 abuts against the opening of the sliding cavity 22, forming a dynamic sealing structure with the valve stem 4 passing through it, preventing high-pressure water flow in the water passage cavity 12 from leaking out of the sliding cavity 22.
[0029] Reference Figure 1 and Figure 3 There are several first flow channels 23, which are evenly distributed around the circumference of the buffer chamber 21. By using multiple first flow channels 23, the liquid is evenly introduced into the buffer chamber 21, reducing the possibility of pressure fluctuations caused by the impact of water flow in a single flow channel, making the valve stem 4 more stable under force, and reducing the possibility that a single flow channel will be blocked by impurities, causing the buffer chamber 21 to be unable to take in water.
[0030] Reference Figure 1 and Figure 2 This embodiment of a plunger pump includes a pump body 1 and a pressure regulating valve for a high-pressure washer. The pump body 1 has a water passage chamber 12, and an inlet chamber 13, an outlet chamber 14, and an installation chamber 11 respectively connected to the water passage chamber 12. The pump body 1 also has an annular cavity 15 and a second flow channel 16 connecting the annular cavity 15 and the outlet chamber 14. A valve seat 3 is installed in the water passage chamber 12, a regulating valve core 5 is located in the water passage chamber 12, a fixing seat 2 is installed in the installation chamber 11, a sealing gasket 71 is installed in the installation chamber 11, and a first flow channel 23 is located in the annular cavity 15. Water flows sequentially through the main path of the inlet chamber 13, valve seat 3, water passage chamber 12, and outlet chamber 14, while simultaneously buffering the pressure on the valve stem 4 by sequentially passing through the path from the outlet chamber 14, the second flow channel 16, the annular cavity 15, the first flow channel 23, to the buffer chamber 21.
[0031] Reference Figure 1 and Figure 2 A water outlet connector 9 is installed on the water outlet chamber 14. A check valve core 91 is slidably sleeved on the water outlet connector 9. A check spring 92 is installed on the water outlet connector 9. The two ends of the check spring 92 abut against the check valve core 91 and the water outlet connector 9, respectively. The check spring 92 always drives the check valve core 91 to move towards the inlet of the water outlet chamber 14 until the inlet of the water outlet chamber 14 is blocked. When the cleaning machine stops or the water pressure drops suddenly, the check spring 92 pushes the check valve core 91 to close the flow channel, reducing the possibility of water backflow into the water outlet chamber 14 impacting the valve seat 3, thereby reducing the possibility of damage to the valve seat 3.
[0032] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.
Claims
1. A pressure regulating valve for a high-pressure cleaner, comprising a fixed seat (2), a valve stem (4), an adjusting valve core (5), a valve seat (3), and an adjusting spring (6), characterized in that: The fixed seat (2) has a sliding cavity (22) with a cavity opening diameter smaller than the inner cavity diameter. The fixed seat (2) has a buffer cavity (21) and a first flow channel (23) connecting the buffer cavity (21). The valve stem (4) is slidably sleeved in the sliding cavity (22). The valve stem (4) has a step (41) above the buffer cavity (21). The diameter of the buffer cavity (21) is larger than the outer diameter of the step (41). The regulating valve core (5) is installed on the valve stem (4). The regulating spring (6) is installed on the fixed seat (2). The regulating spring (6) always drives the valve stem (4) to move toward the valve seat (3) until the regulating valve core (5) abuts against the valve seat (3).
2. A pressure regulating valve for a high pressure washer as defined in claim 1, characterized in that: It also includes a pressure regulating nut (8), which is threadedly connected to the fixed seat (2). The adjusting spring (6) is installed inside the pressure regulating nut (8). The two ends of the adjusting spring (6) abut against the pressure regulating nut (8) and the valve stem (4) respectively. The adjusting spring (6) always drives the valve stem (4) to slide away from the pressure regulating nut (8).
3. A pressure regulating valve for a high pressure washer as defined in claim 1, characterized in that: It also includes a fixing pad (7), on which a sealing pad (71) is provided. The sealing pad (71) abuts against the opening of the sliding cavity (22), and the valve stem (4) passes through both the fixing pad (7) and the sealing pad (71).
4. A pressure regulating valve for a high pressure washer as defined in claim 1, characterized in that: There are several first flow channels (23), and several first flow channels (23) are evenly distributed around the buffer cavity (21) in the circumference.
5. A plunger pump, comprising a pump body (1), wherein the pump body (1) has a water passage chamber (12), and an inlet chamber (13), an outlet chamber (14), and an mounting chamber (11) respectively connected to the water passage chamber (12), characterized in that: It also includes a pressure regulating valve for a high-pressure cleaner according to any one of claims 1-4, and the pump body (1) is also provided with an annular cavity (15) and a second flow channel (16) connecting the annular cavity (15) and the water outlet cavity (14), the valve seat (3) is installed in the water passage cavity (12), the fixed seat (2) is installed in the mounting cavity (11), the sealing gasket (71) is installed in the mounting cavity (11), and the first flow channel (23) is located in the annular cavity (15).
6. A piston pump according to claim 5, characterized in that: A water outlet connector (9) is installed on the water outlet chamber (14). A check valve core (91) is slidably sleeved on the water outlet connector (9). A check spring (92) is installed on the water outlet connector (9). The two ends of the check spring (92) abut against the check valve core (91) and the water outlet connector (9) respectively. The check spring (92) always drives the check valve core (91) to move toward the inlet of the water outlet chamber (14) until the inlet of the water outlet chamber (14) is blocked.