High pressure cleaning machine gun unloading stop device
By designing components such as high-pressure water outlet valves, pressure regulating valves, pressure relief valves and pressure maintenance valves in high-pressure cleaning machines, the damage to parts caused by residual high-pressure cleaning machines is solved, and the immediate shutdown and low-pressure pressure of high-pressure cleaning machines are achieved. , improves service life and pressure holding performance.
Patent Information
- Application Number
- CN202010950958.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-09-11
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2040-09-11
AI Technical Summary
The existing high-pressure cleaning machines have high pressure left in the pump after turning off the gun, resulting in damage to internal parts and shortening their service life, affecting the use effect.
A high-pressure cleaning machine gun unloading and shutdown device is designed, including a high-pressure water outlet valve, pressure regulating valve, pressure relief valve, pressure holding valve and micro switch, through the pressure relief tip rod, overflow seat, steel ball, pressure stabilization valve core, Components such as pressure-keeping valve core and return spring can achieve rapid discharge of high-pressure water and low-pressure pressure-keeping state, avoiding high-pressure water circulation and parts damage.
It realizes the immediate shutdown and low-pressure pressure standby state of the high-pressure cleaning machine gun, avoids water temperature rise and damage to parts, improves service life and pressure holding performance, saves energy, and ensures the protection of internal parts.
Smart Images
Figure CN112044619B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a plunger pump component of a high-pressure cleaning machine, in particular to an unloading and stopping device for a high-pressure cleaning machine gun. Background Art
[0002] At present, high-pressure cleaning machines have been widely used in people's lives. They use high-pressure water generated by high-pressure pumps to strongly wash the surface of objects. They can be used to clean cars, gardens, walls and other fields. Therefore, high-pressure cleaning is also considered to be one of the most scientific and environmentally friendly cleaning methods. At present, the high-pressure cleaning machines used on the market, after the gun is turned off, the high-pressure water inside the pump's own pressure regulating valve opens the return switch, allowing the high-pressure water to return to the water inlet channel to achieve internal circulation. During the use of this structure, the temperature of the circulating high-pressure water continues to rise, causing rapid aging of internal parts, especially seals and other parts, resulting in a shortened life and affecting the use effect. In addition, some high-pressure cleaning machines can also realize the function of turning off the gun and stopping the machine, but this type of high-pressure cleaning machine uses a high-pressure maintaining device, that is, after the gun is turned off and stopped, there is a pressure higher than the working pressure remaining in the pump, which places extremely high requirements on the outlet high-pressure pipe and is prone to cause the high-pressure pipe to rupture. Summary of the invention
[0003] Purpose of the invention: The purpose of the present invention is to provide a solution to the problem of damage to internal parts caused by high pressure left in the pump after cleaning the existing machine gun, which affects the service life, and improve the usability and reliability of the pump.
[0004] Technical solution: The unloading and stopping device of the high-pressure cleaning machine gun described in the present invention comprises a high-pressure water outlet valve arranged between the water inlet and the water outlet of the plunger pump, a pressure regulating valve and a pressure maintaining valve are arranged in sequence on the channel connecting the water outlet end of the high-pressure water outlet valve and the water outlet joint, a pressure relief valve is arranged in the channel at the lower end of the pressure regulating valve, the pressure relief valve comprises a pressure relief push rod, an overflow seat and a steel ball, the bottom of the pressure relief push rod is connected to the channel where the water outlet joint is installed, a through hole connected to the water inlet is arranged in the pressure relief push rod, the overflow seat is installed on the upper side of the pressure relief push rod, and the steel ball is seated on the overflow seat , the pressure-maintaining valve comprises a pressure-maintaining valve cover, a pressure-stabilizing valve core, a pressure-maintaining valve core, a pressure-maintaining valve core spring and a pressure-maintaining valve return spring; one side of the pressure-maintaining valve is connected to the water outlet joint through the pressure-maintaining valve return spring; a pressure-maintaining valve core spring is arranged between the pressure-maintaining valve core and the pressure-stabilizing valve core; a pressure-maintaining valve return spring is arranged between the pressure-maintaining valve cover and the water outlet joint; a micro-switch device is arranged between the water outlet end of the pressure regulating valve and the water outlet joint; the micro-switch device comprises a switch top rod for driving the micro-switch to be turned on and off; the lower side of the switch top rod is communicated with the water outlet channel of the pressure regulating valve, and the upper side is communicated with the channel for installing the water outlet joint;
[0005] Among them, after the gun is turned off, the water pressure in the water outlet channel increases rapidly, and the pressure at the lower end of the pressure relief push rod increases. When the pressure is greater than the spring force of the pressure regulating valve, the pressure relief push rod lifts the steel ball, and high-pressure water flows back into the water inlet hole from the return water hole on the pressure relief push rod. The left side of the pressure maintaining valve is a low-pressure area, and the right side of the pressure maintaining valve still maintains a certain high pressure, and the pressure maintaining valve is fitted to the pump body and sealed. At this time, the pressure on the right side of the pressure-stabilizing valve core is greater than the spring force on the left side, which pushes the pressure-stabilizing valve core to move to the left, and the pressure on the right side is unloaded into the pump body. When the pressure is unloaded to the set pressure, the pressure maintaining valve core spring pushes the pressure-stabilizing valve core and the pressure maintaining valve cover to form a sealed pressure maintenance. At this time, the spring force on the left side of the pressure-stabilizing valve core is equal to the pressure on the right side, reaching a balanced state, and realizing low pressure maintenance. At the same time, the lower end of the switch push rod is a low-pressure area, and the upper end of the switch push rod is connected to the channel where the water outlet joint is installed. The pressure on the upper end of the switch push rod is greater than the spring force on the lower end, which drives the switch push rod to move downward and disengage from the micro switch. The micro switch is powered off at this time, and the motor stops working, realizing shutdown and low pressure maintenance.
[0006] In order to facilitate the adjustment of the working water pressure, the pressure regulating valve includes a pressure regulating plug, a pressure regulating spring, a spring seat, a pressure regulating rod and a pressure regulating cap. The lower end of the pressure regulating plug makes the spring seat abut against the steel ball through the pressure regulating spring, and the upper end is equipped with a pressure regulating rod for driving the spring seat to move. The pressure regulating rod passes through the pressure regulating cap and is connected to the pressure regulating knob.
[0007] The spring seat is installed in a channel connected with the water outlet end of the high-pressure water outlet valve and the pressure maintaining valve.
[0008] In order to facilitate water discharge, a liquid suction nozzle is installed in the water outlet joint. One side of the pressure maintaining valve abuts against the water outlet channel of the pressure regulating valve and seals the pump body through a sealing ring, and the other end is connected to the liquid suction nozzle through a pressure maintaining valve return spring.
[0009] In order to facilitate the mixed spraying of soap liquid and high-pressure water, a soap liquid device is also included, which includes a liquid suction joint, a liquid suction steel ball is placed under the liquid suction joint and is sealed with the top of the liquid suction steel ball through a sealing ring, a liquid suction spring is arranged under the liquid suction steel ball, and the cavity under the liquid suction steel ball is connected with the outlet of the liquid suction nozzle. When high-pressure water passes through the liquid suction nozzle, a negative pressure zone is formed at the outlet of the liquid suction nozzle through the siphon effect. When the negative pressure in the negative pressure zone is greater than the elastic force of the liquid suction spring, the liquid suction steel ball is driven to move downward, and the soap liquid is sucked into the water outlet joint through the liquid suction joint, and mixed with the high-pressure water at the outlet of the liquid suction nozzle and flows out together.
[0010] In order to facilitate the switch push rod to drive the micro switch to turn on and off, the switch push rod includes a push rod seat and a push rod, the push rod is connected to the upper end of the push rod seat, the bottom of the push rod seat is connected to the water outlet channel of the pressure regulating valve, the upper part of the push rod seat is connected to the channel for installing the water outlet joint, and a switch push rod spring is arranged between the bottom of the push rod seat and the water outlet channel of the pressure regulating valve.
[0011] When working, the steel ball of the soap liquid device is opened to absorb the soap liquid, and the channel between the liquid suction nozzle and the water outlet joint is a Venturi tube structure.
[0012] In order to ensure that high-pressure water does not flow into the pressure relief valve when the spray gun is working, the overflow seat is sealed with the channel where the pressure relief valve is installed through a sealing ring.
[0013] To prevent high-pressure water from entering the water inlet and causing leakage, the pressure relief push rod is sealed with the channel where the pressure relief valve is installed through a sealing ring.
[0014] The pressure-maintaining valve core is sealed with the pump body through a sealing ring.
[0015] Beneficial effects: The present invention can immediately shut down the machine gun after high-pressure cleaning, cut off the power source, and enter a low-pressure standby state; at the same time, it can immediately restart after firing, avoiding the internal circulation of high-pressure water and the resulting increase in water temperature, which affects the internal seals, and at the same time avoids damage to parts such as high-pressure pipes caused by the standby high-pressure state. It not only saves energy, but also protects internal parts, ensures the service life of the plunger pump, and the pressure holding performance is also greatly improved, and pressure holding can still be achieved even at a lower pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the structure of the present invention;
[0017] Figure 2 yes Figure 1 The schematic diagram of the structure along the BB section line;
[0018] Figure 3 It is a schematic diagram of the assembly of the micro switch of the present invention;
[0019] Figure 4 It is a schematic diagram of the structure without the voltage regulating knob assembly. DETAILED DESCRIPTION
[0020] The invention will be further described below in conjunction with the accompanying drawings.
[0021] like Figure 1-3As shown, the present invention discloses a high-pressure cleaning machine gun unloading and stopping device, comprising a high-pressure water outlet valve 16 arranged at the water inlet and the water outlet of the plunger pump, the high-pressure water outlet valve 16 is connected to the water outlet joint 10 through the water outlet three-way channel, a pressure-maintaining valve is arranged on the water outlet side of the transverse channel of the water outlet three-way, a pressure regulating valve and a pressure relief valve are arranged in the longitudinal channel from top to bottom, the pressure relief valve comprises a pressure relief push rod 36, an overflow seat 32 and a steel ball 31, the bottom of the pressure relief push rod 36 is connected to the channel for installing the water inlet joint 17, a through hole connected to the water inlet is arranged in the pressure relief push rod 36, and the pressure relief push rod 36 is connected to the installation through a sealing ring 1 The channel seal of the pressure relief valve prevents high-pressure water from entering the water inlet and causing leakage. The overflow seat 32 is installed on the upper side of the pressure relief top rod 36. The overflow seat 32 is sealed with the channel seal of the pressure relief valve through the sealing ring 1. The steel ball 31 is clamped on the overflow seat 32. The pressure regulating valve includes a pressure regulating plug 29, a spring seat 30, a pressure regulating rod 23 and a pressure regulating cap 40. The lower end of the pressure regulating plug 29 abuts on the steel ball 31 through the spring seat 30, and the upper end is installed with a pressure regulating rod 23 that drives the spring seat 30 to move. A pressure regulating spring 28 is installed between the spring seat 30 and the pressure regulating rod 23. The pressure regulating rod 23 passes through the pressure regulating cap 40 and is connected to the pressure regulating knob 22, the pressure regulating rod 23 can be driven by the pressure regulating knob 22 to compress the pressure regulating spring 28 so that the steel ball 31 fits tightly on the overflow seat 32 and can achieve different pressing forces, thereby adjusting the leakage of the water flow to achieve different water outlet pressures and flows. A micro switch device is provided between the water outlet end of the pressure regulating valve and the water outlet connector 10. The micro switch device includes a switch top rod 51 that drives the micro switch to be turned on and off. The lower side of the switch top rod 51 is connected to the water outlet channel of the pressure regulating valve, and the upper side is connected to the channel where the water outlet connector 10 is installed. A switch top rod spring 54 is provided between the bottom of the switch top rod 51 and the water outlet channel of the pressure regulating valve, and through The elastic force of the spring lifts the push rod to trigger the microswitch to turn on. The pressure-maintaining valve includes a pressure-maintaining valve core 2, a pressure-stabilizing valve core 12 and a pressure-maintaining valve cover 13. The pressure-maintaining valve core 2 and the pressure-stabilizing valve core 12 are installed in the pressure-maintaining valve cover 13. A pressure-maintaining valve core spring 11 is arranged between the pressure-maintaining valve core 2 and the pressure-stabilizing valve core 12. One side of the pressure-maintaining valve core 2 abuts against the water outlet channel of the pressure regulating valve and is sealed by a sealing ring 1, and the other end is equipped with a pressure-maintaining valve cover. The pressure-maintaining valve cover 13 is connected to the water outlet joint 10 through a pressure-maintaining valve reset spring 14. When working, the pressure-maintaining valve moves to the right under the impact of high-pressure water, and the high-pressure water flows through the pressure-maintaining valve into the water outlet joint and flows out.When the gun is closed, the pressure relief push rod 36 lifts the steel ball to release the pressure. Under the action of the pressure retaining valve return spring 14, the pressure retaining valve fits with the conical surface of the pump body to form a seal. At this time, the right side of the pressure retaining valve still maintains a certain high pressure. The pressure on the right side of the pressure retaining valve core 2 is greater than the force of the pressure retaining valve core spring 11 on the left, which will push the pressure retaining valve core 2 to move to the left, and unload the pressure in the water outlet joint 10 into the pump body. When the pressure is unloaded to the set pressure, the pressure retaining valve core spring 11 pushes the pressure retaining valve core 2 to move to the right and fits with the sealing ring in the pressure retaining valve cover 13 to maintain pressure. The liquid suction nozzle 15 is interference installed in the water outlet joint 10. The liquid suction nozzle 15 is connected to the soap liquid device. The soap liquid device It includes a liquid suction joint 5, a liquid suction steel ball 7 is arranged below the liquid suction joint 5 and is sealed with the top of the liquid suction steel ball through a sealing ring, a liquid suction spring 9 is arranged below the liquid suction steel ball 7, and the cavity below the liquid suction steel ball 7 is connected with the outlet of the liquid suction nozzle 15. When high-pressure water passes through the liquid suction nozzle 15, a negative pressure area is formed at the outlet of the liquid suction nozzle 15. When the negative pressure is greater than the elastic force of the liquid suction spring 9, the liquid suction steel ball 7 is driven to move downward, and the soap liquid enters the outlet of the liquid suction nozzle 15 and flows out together with the high-pressure water. The channel between the liquid suction nozzle 15 and the water outlet joint 10 is a Venturi tube structure, so that the liquid suction nozzle can form a negative pressure area during operation, and the steel ball of the soap liquid nozzle can be opened to achieve the effect of suction.
[0022] like Figure 4 As shown, the pressure regulating knob assembly can be eliminated and the pressure regulating plug can be designed to be closed, so that the fixed value gun closing and unloading shutdown can be achieved and the machine can enter a low pressure maintaining state.
[0023] When the machine is not started, the pressure regulating spring 28 presses the steel ball 31 tightly against the overflow seat 32 through the spring seat 30 to form a seal, the pressure retaining valve reset spring 14 presses the sealing ring 1 on the pressure stabilizing valve core 2 against the pump body through the pressure retaining valve cover 13, and the pressure retaining valve core spring 11 presses the right end face of the pressure retaining valve core 12 against the pressure retaining valve cover. The switch push rod spring 54 pushes up the switch push rod, thereby triggering the micro switch and turning it on. After the machine is plugged into the power supply, the motor is energized and rotates at high speed, the water pressure in the pump head increases rapidly, pushing the pressure maintaining valve core 2 to move to the right, and high-pressure water flows out from the water outlet. The middle part of the pressure relief push rod 36 is connected with the water outlet to form a high-pressure area, which pushes the pressure relief push rod to move upward and stick to the steel ball. When the machine is working normally, the upward water pressure force on the lower end of the steel ball 31 is less than the spring force of the pressure regulating spring 28, so when working normally, the steel ball 31 is tightly attached to the overflow seat 32, and high-pressure water will flow out of the water outlet continuously.
[0024] At the moment of closing the gun, the water outlet of the gun valve is closed. At this time, the motor is not immediately powered off and is still running. The pressure at the water outlet rises rapidly, the water pressure loss in the channel where the water outlet joint is installed increases, and the pressure at the lower end of the pressure relief push rod 36 increases. When the pressure is greater than the elastic force of the spring on the upper side of the overflow seat 32, the pressure relief push rod 36 lifts the steel ball 31, and the high-pressure water flows back into the water inlet hole from the through hole on the pressure relief push rod 36. The pressure relief is completed on the left side of the pressure maintaining valve, and a certain high pressure is still maintained on the right side. Under the action of the pressure maintaining valve reset spring 14, the pressure maintaining valve core 2 is fitted with the conical surface of the pump body through the sealing ring 1 to form a seal. The pressure on the right side of the pressure stabilizing valve core 12 is greater than the spring force on the left, which will push the pressure stabilizing valve core 12 to move to the left, unloading the pressure in the water outlet into the pump body. When the pressure When the pressure is unloaded to the set pressure, the pressure-maintaining valve core spring 11 will push the pressure-stabilizing valve core 12 to move rightward and fit with the pressure-maintaining valve cover to form a sealed pressure-maintaining function. The lower end of the switch top rod 51 is connected to the left side of the pressure-maintaining valve. The lower end of the switch top rod 51 is a low-pressure area. The upper end of the switch top rod 51 is connected to the water outlet joint 10 to maintain high pressure. The pressure at the upper end of the switch top rod is greater than the spring force at the lower end, causing the switch top rod to move downward and disengage from the microswitch. The microswitch is powered off, the motor stops working, and then the gun is shut down and the pressure is maintained, thereby realizing the gun shut down and low pressure maintenance functions. When the gun is fired again, the pressure in the high-pressure pipe is instantly unloaded, and the pressure on the upper side of the switch top rod is less than the spring force on the lower side of the switch top rod. The switch top rod moves upward, triggering the microswitch to power on, and the motor starts to run.
Claims
1. A high pressure cleaning machine gun unloading and stopping device, characterized in that: The invention comprises a high-pressure water outlet valve (16) arranged between the water inlet and the water outlet of the plunger pump, wherein a pressure regulating valve and a pressure maintaining valve are arranged in sequence on a channel communicating between a water outlet end of the high-pressure water outlet valve (16) and a water outlet joint (10), a pressure relief valve is arranged in the channel at the lower end of the pressure regulating valve, and the pressure relief valve comprises a pressure relief push rod (36), an overflow seat (32) and a steel ball (31), the bottom of the pressure relief push rod (36) is communicated with a channel for installing a water inlet joint (17), and a through hole communicating with the water inlet is arranged in the pressure relief push rod (36), The overflow seat (32) is installed on the upper side of the pressure relief push rod (36), the steel ball (31) is seated on the overflow seat (32), the pressure-maintaining valve comprises a pressure-maintaining valve cover (13), a pressure-stabilizing valve core (12), a pressure-maintaining valve core (2), a pressure-maintaining valve core spring (11) and a pressure-maintaining valve reset spring (14), one side of the pressure-maintaining valve is connected to the water outlet joint (10) via the pressure-maintaining valve reset spring (14), a pressure-maintaining valve core spring (11) is arranged between the pressure-maintaining valve core (2) and the pressure-stabilizing valve core (12), and the pressure-maintaining valve cover (13) is connected to the water outlet joint (10). A pressure-maintaining valve return spring (14) is arranged between the water outlet joints; a micro switch device is arranged between the water outlet end of the pressure regulating valve and the water outlet joint (10); the micro switch device comprises a switch top rod (51) for driving the micro switch to be turned on and off; the lower side of the switch top rod (51) is communicated with the water outlet channel of the pressure regulating valve, and the upper side is communicated with the channel for installing the water outlet joint; the pressure regulating valve comprises a pressure regulating plug (29), a pressure regulating spring (28), a spring seat (30), a pressure regulating rod (23) and a pressure regulating cap (40); the pressure regulating plug (29) 9) The lower end is connected to the spring seat (30) and the steel ball by a pressure regulating spring (28), and the upper end is provided with a pressure regulating rod (23) for driving the spring seat to move, and the pressure regulating rod (23) passes through the pressure regulating cap (40) and is connected to the pressure regulating knob (22); the switch mandrel comprises a mandrel seat and a mandrel, the mandrel is connected to the upper end of the mandrel seat, the bottom of the mandrel seat is connected to the water outlet channel of the pressure regulating valve, the upper part of the mandrel seat is connected to the channel for installing the water outlet joint, and a switch mandrel spring (54) is provided between the bottom of the mandrel seat and the water outlet channel of the pressure regulating valve;After the gun is turned off, the water pressure in the water outlet channel increases rapidly, and the pressure at the lower end of the pressure relief push rod (36) increases. When the pressure is greater than the spring force of the pressure regulating valve, the pressure relief push rod (36) lifts the steel ball (31), and the high-pressure water flows back into the water inlet hole from the return hole on the pressure relief push rod. The left side of the pressure-maintaining valve is a low-pressure area, and the right side of the pressure-maintaining valve still maintains a certain high pressure. The pressure-maintaining valve is fitted to the pump body and sealed. At this time, the pressure on the right side of the pressure-maintaining valve core (12) is greater than the spring force on the left side, pushing the pressure-maintaining valve core (12) to move leftward, unloading the pressure on the right side into the pump body. When the pressure is unloaded to the set When the pressure is high, the pressure-maintaining valve core spring (11) pushes the pressure-maintaining valve core (12) and the pressure-maintaining valve cover (13) to fit together to form a sealed pressure-maintaining state. At this time, the spring force on the left side of the pressure-maintaining valve core (12) is equal to the pressure on the right side, reaching a balanced state, and realizing low pressure maintenance. At the same time, the lower end of the switch top rod (51) is a low-pressure area, and the upper end of the switch top rod (51) is connected to the channel for installing the water outlet joint. The pressure on the upper end of the switch top rod (51) is greater than the spring force on the lower end, driving the switch top rod (51) to move downward and disengage from the micro switch. The micro switch is powered off at this time, and the motor stops working, realizing shutdown and low pressure maintenance. ; 2. The unloading and stopping device for a high-pressure cleaning machine gun according to claim 1, characterized in that: The spring seat (30) is installed in a channel connected to the water outlet end of the high-pressure water outlet valve and the pressure-maintaining valve.
3. The unloading and stopping device for a high-pressure cleaning machine gun according to claim 1, characterized in that: A liquid suction nozzle (15) is installed in the water outlet joint (10); one end of the pressure retaining valve abuts against the water outlet channel of the pressure regulating valve and seals the pump body via a sealing ring; the other end of the pressure retaining valve is connected to the liquid suction nozzle (15) via a pressure retaining valve return spring (14).
4. The unloading and stopping device for a high-pressure cleaning machine gun according to claim 3 is characterized in that: It also comprises a soap liquid device, the soap liquid device comprising a liquid suction joint (5), a liquid suction steel ball (7) is placed below the liquid suction joint (5) and is sealed with the top of the liquid suction steel ball (7) via a sealing ring, a liquid suction spring (9) is arranged below the liquid suction steel ball (7), the cavity below the liquid suction steel ball (7) is connected to the outlet of the liquid suction nozzle (15), when high-pressure water passes through the liquid suction nozzle (15), a negative pressure zone is formed at the outlet of the liquid suction nozzle through a siphon effect, when the negative pressure in the negative pressure zone is greater than the elastic force of the liquid suction spring, the liquid suction steel ball (7) is driven to move downward, and the soap liquid is sucked into the water outlet joint through the liquid suction joint (5), and is mixed with the high-pressure water at the outlet of the liquid suction nozzle and flows out together.
5. The unloading and stopping device for a high-pressure cleaning machine gun according to claim 3, characterized in that: The channel between the liquid suction nozzle (15) and the water outlet joint (10) adopts a Venturi tube structure.
6. The unloading and stopping device for a high-pressure cleaning machine gun according to claim 1, characterized in that: The overflow seat (32) is sealed with a channel in which the pressure relief valve is installed via a sealing ring (1).
7. The unloading and stopping device for a high-pressure cleaning machine gun according to claim 1, characterized in that: The pressure relief push rod (36) is sealed with a channel in which the pressure relief valve is installed via a sealing ring (1).
8. The unloading and stopping device for a high-pressure cleaning machine gun according to claim 1, characterized in that: The pressure-maintaining valve core (2) is sealed with the pump body via a sealing ring (1).