Device for automatic opening of high-pressure lance after water inlet

Abstract

A kind of high-pressure spray gun water inlet pressure relief automatic opening device, including the spray gun body being arranged in shell, the spray gun body includes valve body, the water inlet pipe being connected in the water inlet of valve body, the water outlet pipe being connected in the water outlet of valve body, the nozzle being connected in the end of water outlet pipe and trigger, the support is equipped on valve body, the upper end of trigger is hinged with support, the outside end of valve core mechanism's thimble in valve body and the inside surface of trigger are equipped with elastic push mechanism;When the trigger is loosened and the spray gun is closed, the spring or the spring piece in elastic push mechanism still exerts push force to thimble, the push force is greater than the pressure of water to thimble after pressure relief, the resistance between thimble and sealing ring and the elasticity of spherical spring, so the sphere is opened with appropriate gap, the spray gun is automatically opened after pressure relief, the water retained in interior can be timely drained and emptied, avoid the phenomenon of ice blocking or even damage after winter use.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure spray guns, and in particular to a device that automatically opens after a high-pressure spray gun is depressurized by water intake. Background Technology

[0002] A high-pressure spray gun is a tool that uses high-pressure water jets for powerful cleaning. It typically consists of a pump body, nozzle, handle, and gun body. Connected to a high-pressure washer, it generates a high-pressure water jet that is sprayed at high speed from the nozzle, producing a powerful impact that effectively removes and washes away stubborn dirt, oil stains, dust, algae, paint residue, and other contaminants from various surfaces. It is easy to operate and can be widely used for cleaning vehicles, building exteriors, floors, and machinery. During use, when the trigger is released to turn off the gun, the ejector pin loses the trigger's pressure, the sealing steel ball inside the gun body loses the ejector pin's pushing force, and the internal spring's return presses the sealing steel ball tightly against the valve seat, closing the internal water flow channel and shutting off the gun. The problem is that the self-service car wash market is growing rapidly, and self-service car wash equipment is often unattended. After the high-pressure spray gun is turned off, the connecting water pipe is sealed, resulting in some water remaining inside the pipe. In cold winter weather, this residual water can freeze and clog the connecting water pipe, rendering the equipment unusable and causing damage to the high-pressure spray gun due to freezing. Utility Model Content

[0003] To solve the above problems, this utility model proposes a device that automatically opens after the high-pressure spray gun is depressurized by water intake.

[0004] The technical solution of this utility model is: a device for automatically opening a high-pressure spray gun after water inlet and pressure release, comprising a spray gun body disposed in a housing, the spray gun body comprising a valve body, an inlet pipe connected to the inlet of the valve body, an outlet pipe connected to the outlet of the valve body, a nozzle connected to the end of the outlet pipe, and a trigger, the valve body being provided with a support, the upper end of the trigger being hinged to the support, and an elastic pushing mechanism being provided between the outer end of the pin of the valve core mechanism inside the valve body and the inner side of the trigger.

[0005] Preferably, the elastic pushing mechanism includes a push pin spring and a stepped A provided on the push pin extension. One end of the push pin spring is sleeved on the outer end of the push pin and supported on the stepped A, while the other end is supported on the inner side of the trigger.

[0006] Preferably, the ejector pin spring is tower-shaped, with its smaller end supported at step A and its larger end supported on the trigger.

[0007] Preferably, the elastic pushing mechanism includes a spring sheet connected to the upper inner side of the trigger, and the outer end of the ejector pin is supported on the spring sheet.

[0008] Preferably, a deformation gap is provided between the spring piece and the trigger at the center of the inner side of the trigger pin position.

[0009] Preferably, the spring sheet has a round hole in the middle, the outer end of the ejector pin is inserted into the round hole, and the end of the ejector pin has a step B, which rests on the surface of the spring sheet.

[0010] Preferably, the upper end of the spring is provided with a square notch that fits onto the support, and the lower end of the spring is provided with an arc-shaped notch that supports the trigger.

[0011] Preferably, the valve core mechanism includes a ball, a ball spring, and a sealing seat. The valve body has a chamber communicating with the inlet and outlet. The sealing seat is located at the junction of the inlet and outlet. The ball is located at the sealing seat. The ball spring is supported on the ball. The rear end of the valve body is connected to a compression spring nut seat.

[0012] Preferably, the sealing seat is provided with a sealing ring with a circular cross-section, and the size of the sealing ring matches the size of the sphere.

[0013] The beneficial technical effects of this utility model are: (1) The present invention installs a spring or spring between the ejector pin and the trigger. When the trigger is released and the spray gun is closed, the spring or spring will still apply a pushing force to the ejector pin. This pushing force is greater than the pressure of the water on the ejector pin after depressurization, the resistance between the ejector pin and the sealing ring, and the elastic force of the ball spring. Therefore, the ball will be pushed open with an appropriate gap. After the spray gun is depressurized, it will open automatically. The water stored inside can flow out and be emptied in time, avoiding the phenomenon of freezing, blockage, or even damage after use in winter.

[0014] (2) This utility model, while ensuring the original function of the spray gun, realizes the effect of automatically opening the drainage channel by depressurizing the water supply of the spray gun after the spray gun is turned off, and can make low-cost improvements and upgrades for the spray guns currently widely used in the market. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the present invention after removing the outer shell and installing the ejector pin spring; Figure 3 yes Figure 2 A schematic diagram of the valve body after it has been cut open; Figure 4 This is a three-dimensional structural diagram of the present invention with the outer shell removed and the spring clip installed; Figure 5 yes Figure 4 A magnified view of a portion of the image; Figure 6 yes Figure 4 Front view structural diagram; Figure 7This is a schematic diagram of the main structure of the shrapnel.

[0016] In the diagram, 1. Valve body, 11. Inlet, 12. Outlet, 13. Chamber, 21. Inlet pipe, 22. Outlet pipe, 23. Trigger, 24. Support, 31. Ejector pin spring, 32. Step A, 41. Spring piece, 42. Deformation gap, 43. Round hole, 44. Square notch, 45. Arc-shaped notch, 46. Step B, 51. Ejector pin, 52. Ball, 53. Ball spring, 54. Sealing seat, 55. Sealing ring, 56. Nut seat, 6. Outer shell. Detailed Implementation

[0017] Example 1, see appendix Figure 1-2 A device for automatically opening a high-pressure spray gun after water pressure release includes a spray gun body housed within a housing 6. The spray gun body includes a valve body 1, an inlet pipe 21 connected to an inlet 11 of the valve body 1, an outlet pipe 22 connected to an outlet 12 of the valve body 1, a nozzle connected to the end of the outlet pipe, and a trigger 23. The inlet pipe 21 is connected to a high-pressure water pump via a flexible hose. A support 24 is provided on the valve body 1, and the upper end of the trigger 23 is hinged to the support 24. A limiting seat is provided inside the housing 6 facing the upper outer side of the trigger 23, and the rotation of the trigger 23 is controlled by the limiting seat. The valve core mechanism includes a ball 52, a ball spring 53, and a sealing seat 54. The valve body 1 has a chamber 13 inside that communicates with the inlet 11 and the outlet 12. The sealing seat is located at the junction of the inlet and the outlet. The sealing seat 54 is an annular seat. The ball 52 is located at the sealing seat 54. The size of the ball matches the size of the sealing seat and can be fitted into the sealing seat 54 to seal it. The ball spring 53 is supported on the ball. The rear end of the valve body 1 is connected to a compression spring nut seat 56. The nut seat has a blind hole, and the spring is installed in the blind hole.

[0018] The sealing seat 54 is provided with a sealing ring 55 with a circular cross-section. The size of the sealing ring matches the size of the ball 52. The sealing ring 55 is used to improve the sealing effect between the ball 52 and the sealing seat 54.

[0019] An elastic pushing mechanism is provided between the outer end of the ejector pin 51 of the valve core mechanism inside the valve body 1 and the inner side of the trigger 23. The outer end of the ejector pin 51 is a ball head. The elastic pushing mechanism applies a pushing force to the ejector pin 51. The pushing force is greater than the pressure of the depressurized water on the ejector pin 51, the resistance between the ejector pin and the sealing ring 55, and the elastic force of the ball spring 53. The ball 52 will be pushed open with an appropriate gap, keeping the spray gun in a slightly open state. The water stored inside can flow out in time to realize the drainage of the pipeline and the spray gun.

[0020] Example 2, see appendix Figure 2-3This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that the elastic pushing mechanism includes a pin spring 31 and a step A 32 provided on the protruding part of the pin 51. One end of the pin spring 31 is sleeved on the outer end of the pin 51 and supported on the step A 32, and the other end is supported on the inner side of the trigger 23. The step A 32 on the pin 51 provides axial limit for the pin spring 31. One end of the pin spring 31 is supported on the side of the trigger 23, and the elastic force generated by the other end can push the pin 51, so that the spray gun can automatically open and vent after it is closed.

[0021] The ejector spring 31 can be a regular helical spring or a tower-shaped spring, depending on the requirements. Its small end is supported at the step A 32, where a washer can be installed to prevent the spring end from deforming and causing the limit failure. At the same time, the washer can also adjust the spring's pushing force and improve its stability. The large end is supported on the trigger 23. The tower-shaped ejector spring 31 has the advantage of a large contact area with the side of the trigger 23, which avoids bending deformation and can provide a stable elastic pushing force for the ejector 51.

[0022] Example 3, see appendix Figure 4-7 This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that the elastic push mechanism includes a spring plate 41. One end of the spring plate 41 is connected to the trigger 23 support 24, and the other end is supported on the inner side of the trigger 23. A deformation gap 42 is provided between the middle of the spring plate 41 and the trigger 23. The deformation gap 42 provides space for the spring plate 41 to elastically deform, so that it can generate a rebound force. The outer end of the ejector pin 51 is supported on the spring plate 41.

[0023] The spring piece 41 has a round hole 43 in the middle. The outer end of the ejector pin 51 is inserted into the round hole 43. The end of the ejector pin 51 has a step 46 that supports the surface of the spring piece 41. A shim can be installed at the step 46. The ejector pin 51 passes through the shim and the round hole 43. The step and the shim provide a limit for the ejector pin 51. The shim can prevent the round hole 43 from deforming and causing the limit to fail, and prevent it from sliding relative to the round hole 43, thereby improving the elastic pushing effect on the ejector pin 51. The upper end of the spring piece 41 has a square notch 44 that fits on the support 24. The lower end of the spring piece 41 has an arc-shaped notch 45 that supports the trigger 23. The square notch positions the upper end of the spring piece, and the arc-shaped notch 45 positions the lower end of the spring piece 41, thereby improving its assembly accuracy.

[0024] When the trigger 23 is released to close the spray gun, the spring force of the spring plate 41 applies a pushing force to the ejector pin 51, so that the spray gun can automatically open and vent after it is closed.

[0025] The deformation force of the shrapnel 41 is linearly related to both its width and length. Therefore, it is very easy to design a shrapnel with appropriate force. It has the advantages of simple structure and durability. It has a good venting effect during use and helps to save the cost of the spray gun.

Claims

1. A device for automatically opening a high-pressure spray gun after water ingress and depressurization, comprising a spray gun body disposed within a housing, characterized in that: The spray gun body includes a valve body, an inlet pipe connected to the inlet of the valve body, an outlet pipe connected to the outlet of the valve body, a nozzle connected to the end of the outlet pipe, and a trigger. A support is provided on the valve body, and the upper end of the trigger is hinged to the support. An elastic pushing mechanism is provided between the outer end of the ejector pin of the valve core mechanism inside the valve body and the inner side of the trigger.

2. The device for automatically opening a high-pressure spray gun after water inlet and pressure relief according to claim 1, characterized in that: The elastic push mechanism includes a push pin spring and a step A provided on the push pin extension. One end of the push pin spring is sleeved on the outer end of the push pin and supported on the step A, while the other end is supported on the inner side of the trigger.

3. The device for automatically opening after water pressure relief in a high-pressure spray gun according to claim 2, characterized in that: The ejector spring is tower-shaped, with its smaller end supported at step A and its larger end supported on the trigger.

4. The device for automatically opening a high-pressure spray gun after water inlet and pressure relief according to claim 1, characterized in that: The elastic push mechanism includes a spring sheet connected to the upper inner side of the trigger, and the outer end of the push pin is supported on the spring sheet.

5. The device for automatically opening a high-pressure spray gun after water inlet and pressure relief according to claim 4, characterized in that: The spring is positioned in the middle of the trigger, behind the ejector pin, and there is a deformation gap between the spring and the trigger.

6. The device for automatically opening a high-pressure spray gun after water inlet and pressure relief according to claim 4, characterized in that: The spring sheet has a round hole in the middle, and the outer end of the ejector pin is inserted into the round hole. The end of the ejector pin has a step B, which rests on the surface of the spring sheet.

7. The device for automatically opening a high-pressure spray gun after water inlet and pressure relief according to claim 6, characterized in that: The upper end of the spring is provided with a square notch that fits onto the support, and the lower end of the spring is provided with an arc-shaped notch that supports the trigger.

8. The device for automatically opening a high-pressure spray gun after water inlet and pressure relief according to claim 1, characterized in that: The valve core mechanism includes a ball, a ball spring, and a sealing seat. The valve body has a chamber that communicates with the inlet and outlet. The sealing seat is located at the junction of the inlet and outlet. The ball is located at the sealing seat. The ball spring supports the ball. The rear end of the valve body is connected to a compression spring nut seat.

9. The device for automatically opening a high-pressure spray gun after water inlet and pressure relief according to claim 8, characterized in that: The sealing seat is provided with a sealing ring with a circular cross-section, and the size of the sealing ring matches the size of the sphere.

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