Accelerator control system of high-pressure washer

Abstract

The invention relates to the technical field of cleaning equipment, in particular to an accelerator control system of a high-pressure cleaning machine, which is characterized in that a high-pressure pump is driven by a gasoline engine, the output end of the high-pressure pump is communicated with a spray gun through a high-pressure pipeline, the high-pressure pipeline is provided with an integrated valve, the integrated valve integrates an accelerator control valve and a pressure release valve, and the high-pressure pipeline is communicated with the accelerator control valve and the pressure release valve; the accelerator control valve comprises a control valve body, an adjusting screw is arranged at one end of the control valve body and fixedly connected with a limiting block in the control valve body, and a steel wire stay wire is arranged at the other end of the control valve body. The sliding block comprises a sliding sleeve and a block body, the block body abuts against the limiting block through a control spring, a plurality of sets of positioning protrusions are arranged on the inner wall of the control valve body, each set of positioning protrusions comprises a plurality of elastic protruding blocks, and positioning grooves are formed in the two sides of the block body. The pressure release valve comprises a valve cavity and a valve block, and the valve cavity and the control valve body are integrally formed. The accelerator control valve is arranged in the high-pressure cleaning machine, so that the maintenance cost of equipment and the gasoline engine is effectively reduced, and the oil saving rate of the gasoline engine is increased.

Description

Technical Field

[0001] This application relates to the technical field of cleaning equipment, and particularly to a throttle control system for a high-pressure cleaning machine. Background Art

[0002] During the cleaning process, regardless of whether the spray gun is turned on or off, the engine has been running at a high speed, and the pump outlet has always maintained a high pressure. This not only wastes energy, but also greatly reduces the service life of the pump because the pressure at the pump outlet cannot be unloaded. Therefore, it is necessary to develop a throttle control system for a high-pressure cleaning machine so that the high-pressure cleaning machine can automatically adjust the engine speed and the pump outlet pressure according to the working needs.

[0003] Chinese Patent CN101109331A, a throttle control system for a high-pressure cleaning machine, discloses a throttle control system for a high-pressure cleaning machine. Its high-pressure pump is driven by an engine. The liquid outlet of the high-pressure pump is connected to the liquid inlet of an overflow unloading valve through a high-pressure pipeline. A unloading pipeline is connected between the high-pressure pipeline and the liquid inlet of the high-pressure pump. The liquid outlet of the overflow unloading valve is connected to the spray gun through a liquid outlet pipeline. Another liquid outlet of the high-pressure pump is equipped with a throttle control valve. The throttle control valve is connected to the engine throttle through a steel wire rope. When the spray gun is closed, the pressure at the pump outlet is quickly unloaded, and at the same time, the throttle is adjusted to reduce the engine speed to idle speed. When the spray gun is opened, the pressure at the pump outlet quickly rises to the working pressure, and at the same time, the engine speed rises to the high-speed state. And when the operator adjusts the cleaning pressure, the engine throttle can be automatically adjusted to a position corresponding to this cleaning pressure.

[0004] In the prior art, the throttle control valve is directly installed on the high-pressure pipeline, and the steel wire cable of the gasoline engine is directly adjusted through the change of the liquid pressure in the high-pressure pipeline during the process of the cleaning machine opening and closing the gun. The steel wire cable is pulled by the throttle control valve on the high-pressure pipeline to increase the throttle of the gasoline engine. The throttle of the gasoline engine will be pulled larger as the cleaning machine opens the gun, so that the speed of the gasoline engine increases, resulting in an increase in the power of the high-pressure pump it drives, and providing a liquid with a greater pressure in the high-pressure pipeline. At this time, the high-pressure liquid in the high-pressure pipeline can no longer act on the throttle control valve that has reached the maximum range. Therefore, there is an urgent need for a throttle control valve that can pull the steel wire cable multiple times, reduce the degree of wear of the mechanical components of the gasoline engine caused by pulling the throttle to the maximum at one time, and improve the service life of the gasoline engine. Summary of the Invention

[0005] In order to overcome the problems existing in the prior art, this application provides a throttle control system for a high-pressure cleaning machine.

[0006] The throttle control system for a high-pressure cleaning machine provided by this application adopts the following technical solutions:

[0007] A throttle control system for a high-pressure cleaning machine, comprising a gasoline engine, a high-pressure pump and a spray gun. The high-pressure pump is driven by the gasoline engine, and the output end of the high-pressure pump is communicated with the spray gun through a high-pressure pipeline. An integrated valve is installed on the high-pressure pipeline. The integrated valve integrates a throttle control valve and a pressure relief valve. Symmetrical openings are provided on the high-pressure pipeline to communicate with the throttle control valve and the pressure relief valve respectively; Throttle control valve, the throttle control valve includes a control valve body. One end of the control valve body is installed with an adjusting screw, and the adjusting screw is fixedly connected with a limiting block in the control valve body. The other end of the control valve body is installed with a steel wire cable, and one end of the steel wire cable is communicated with the high-pressure pipeline. The steel wire cable is fixedly connected with a slider in the control valve body and the other end is connected to the gasoline engine; Slider, the slider includes a sliding sleeve fixedly installed in the control valve body and a block body in the sliding sleeve. The block body is abutted against the limiting block through a control spring. A plurality of groups of positioning protrusions are evenly distributed along the length direction of the inner wall of the control valve body. Each group of positioning protrusions includes several elastic protrusions arranged in a circumferential array on the inner wall. Positioning grooves adapted to the elastic protrusions are provided on both sides of the block body. An elastic member extending from a groove body on the inner wall of the control valve body and an elastic surface located at the outlet of the groove body are provided in the positioning protrusion; Pressure relief valve, the pressure relief valve includes a valve cavity and a valve block. The valve cavity is integrally formed with the control valve body. A perforation provided on the side of the valve cavity is communicated with a water inlet tank through a pressure relief pipeline. The valve block is slidably installed in the valve cavity and the valve block is connected to one end of the valve cavity away from the water inlet through a pressure relief spring.

[0008] By adopting the above technical solution, in the throttle control system of the high-pressure washer, the gasoline engine provides power for the high-pressure pump. The spray gun is connected to the high-pressure pump through a high-pressure pipeline. After the spray gun is opened, the high-pressure pipeline can transfer the liquid in the water inlet tank into the spray gun under the action of the high-pressure pump and export it for high-pressure cleaning. The integrated valve installed on the high-pressure pipeline adopts a combined structure of a throttle control valve and a pressure relief valve. The design of the integrated valve can reduce the connection points between the high-pressure pipeline and the valve to one, simplify the structure on the high-pressure pipeline, and reduce the maintenance cost of the equipment. One end of the control valve body in the throttle control valve adjusts the position of the limit block in the control valve body by an adjusting screw. One end of the slider in the control valve body is connected to the limit block through a control spring, and the other end is connected to the gasoline engine through a wire cable. The limit block is used to be connected to the slider in the control valve body through a control spring. By adjusting the position of the limit block, the distance of the wire cable can be adjusted, so as to control the distance of the piston to adapt to the throttle distance of the gasoline engine. The slider includes a sleeve in the control valve body and a block slidably installed in the sleeve. The block abuts against the limit block through a control spring. The block is located at one end of the wire cable and communicates with the high-pressure pipeline. When the liquid in the high-pressure pipeline acts on the block, it can drive the block to slide in the sleeve and the control valve body. The positioning groove on the block can be adapted to the positioning protrusion on the inner wall of the control valve body. When the slider moves under the pressure of the liquid in the high-pressure pipeline, the positioning protrusion can cooperate with the positioning groove on the block. The positioning protrusion can briefly limit the movement of the block, and then overcome the acting force of several elastic protrusions arranged in a circumferential array in the positioning protrusion. The movement of the block squeezes the elastic member in the elastic surface, realizing that the action of pulling the wire cable is divided into multiple times, reducing the wear degree of the mechanical components of the gasoline engine when the throttle is pulled to the maximum at one time. In the pressure relief valve, a valve block is slidably installed in the valve cavity. The valve block moves in the valve cavity after being subjected to the pressure of the liquid in the high-pressure pipeline. When the pressure in the high-pressure pipeline reaches a certain value, the valve block can squeeze the pressure relief spring and move to connect the perforation on the side of the valve cavity with the high-pressure pipeline, so as to connect the high-pressure pipeline with the unloading pipeline and unload the high-pressure pipeline through the unloading pipeline.

[0009] Preferably, the control valve body adopts a split structure, including an adjusting end and an acting end. Both ends of the slider are fixedly connected to the inner side walls of the adjusting end and the acting end respectively, and the inner diameter of the sleeve is the same as that of the adjusting end. The block can slide between the sleeve and the adjusting end.

[0010] Preferably, positioning blocks are installed on both the limit block of the adjusting end and the end of the block facing the adjusting end. Both ends of the control spring are sleeved on the positioning blocks, and the sum of the lengths of the positioning blocks is the compression limit of the control spring.

[0011] Preferably, the outer side surface of the sleeve is fixedly connected to the inner side surfaces of the adjusting end and the acting end through screws. A space for accommodating high-pressure liquid is opened between the bottom of the sleeve and the acting end, and a perforation communicating with the high-pressure pipeline is opened on the side surface of the acting end.

[0012] By adopting the above technical solution, the control valve body adopts a split structure. The adjustment end and the acting end are connected by a slider and fixedly connected by screws. The inner diameter of the sliding sleeve is designed to be the same as that of the adjustment end, facilitating the stable sliding of the block in the sliding sleeve and the adjustment end. The minimum distance between the block and the limit block is restricted by the limit block and the positioning block on the block, and the compression range of the control spring is restricted within the compression limit of the spring, avoiding the occurrence of plastic deformation of the spring and affecting the normal operation of the throttle control valve. A space for accommodating high-pressure liquid is provided at the bottom of the acting end, and the high-pressure liquid is introduced through the perforation on its side, thereby driving the block to slide in the sliding sleeve.

[0013] Preferably, a pressure relief valve is installed on one side of the high-pressure pipeline away from the perforation on the throttle control valve, and the pressure relief valve is integrally formed with the adjustment end of the throttle control valve.

[0014] Preferably, a cover plate is detachably installed at the top of the valve cavity of the pressure relief valve. The cover plate is threadedly connected to the end of the valve cavity. A buffer groove is installed in the cover plate and is integrally formed with the inner wall of the cover plate. A pressure relief spring is connected to a valve block slidably installed in the buffer groove in the buffer groove. The valve block includes a main body adapted to the inner diameter of the valve cavity and a protruding block slidably connected to the buffer groove.

[0015] Preferably, the protruding block includes a buffer block adapted to the inner diameter of the buffer groove and a ring body adapted to the outer diameter of the buffer groove. The length of the buffer block is the same as that of the ring body, and the buffer block is connected to the bottom of the buffer groove through a pressure relief spring.

[0016] Preferably, a threaded adjusting rod penetrates through the center of the top of the cover plate. One end of the threaded adjusting rod is connected to a support plate at the bottom of the buffer groove, and the other side of the support plate is connected to the pressure relief spring. The outer end of the threaded adjusting rod is locked by a locking nut.

[0017] By adopting the above technical solution, the connection ports led out from the high-pressure pipeline are respectively communicated with the perforations on the throttle control valve and the pressure relief valve, and the valve cavity of the pressure relief valve is integrally formed with the adjustment end, ensuring the stability of the single outlet on the high-pressure pipeline connecting the pressure relief valve and the throttle control valve. The cover plate threadedly connected to the top of the pressure relief valve is detachably installed at one end of the pressure relief valve away from the water inlet. The valve block body in the buffer groove installed in the cover plate is connected to the pressure relief spring, and the pressure relief spring is sleeved on the buffer block on the main body. The buffer block slides in the buffer groove, and the ring body around the buffer block cooperates with the outer side wall of the buffer groove, thereby controlling the stable movement of the valve block body in the valve cavity. And a threaded adjusting rod for adjusting the position of the support plate at the bottom of the buffer groove is also installed on the top of the cover plate. The outer end of the threaded adjusting rod is locked on the cover plate by a locking nut, and the height of the bottom surface of the buffer groove can be adjusted, thereby adjusting the pressure required for the main body to press the pressure relief spring during pressure relief and realizing the adjustment of the required pressure for the pressure relief valve to relieve pressure.

[0018] Preferably, an installation groove for fixing the steel wire cable is formed in the block body, and a bolt for fixing the steel wire cable is installed on the side surface of the end of the block body.

[0019] Preferably, the bottom surface of the slider is located above the perforation, and the block body extends to the bottom close to the control valve body, and an arc transition is provided between the protruding end of the block body and the slider.

[0020] By adopting the above technical solutions, the installation groove at the bottom of the block body is used to install the steel wire cable and is fixed by bolts, which is convenient for subsequent replacement and maintenance of the steel wire cable. Moreover, the bottom surface of the slider is located above the perforation of the control valve body, and an arc transition is provided between the protruding end of the block body and the slider. When the liquid in the high-pressure pipeline is led out through the perforation, it can stably act on the block body in the slider from the bottom.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. An energy-saving throttle control valve installed on the gasoline engine of the present application can reduce the speed and power of the gasoline engine when the machine gun of the high-pressure cleaner is not working, achieving fuel saving, and can raise the speed to the rated value when firing again.

[0023] 2. The integrated valve installed on the high-pressure pipeline of the present application adopts a combined structure of a throttle control valve and a pressure relief valve. The design of the integrated valve can reduce the connection points between the high-pressure pipeline and the valve to one, simplify the structure on the high-pressure pipeline, and reduce the maintenance cost of the equipment.

[0024] 3. The present application realizes that the action of pulling the steel wire cable is carried out in multiple times, reducing the degree of wear of the mechanical components of the gasoline engine caused by pulling the throttle to the maximum at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of a throttle control system for a high-pressure cleaner;

[0026] Figure 2 is Figure 1 a schematic diagram of the structure of the elastic bump in

[0027] Figure 3 is a schematic diagram of the structure of a throttle control system for a high-pressure cleaner and the entire cleaner.

[0028] Description of reference numerals: 1. gasoline engine; 2. high-pressure pump; 21. high-pressure pipeline; 3. spray gun; 4. integrated valve; 5. throttle control valve; 51. control valve body; 52. adjusting screw; 53. limit block; 531. positioning block; 54. wire cable; 55. slider; 551. sliding sleeve; 5511. screw; 552. block body; 5521. positioning groove; 5522. installation groove; 5523. bolt; 56. control spring; 57. positioning protrusion; 571. elastic bump; 572. elastic member; 573. elastic surface; 58. adjusting end; 59. acting end; 6. pressure relief valve; 61. valve cavity; 62. valve block; 621. main body; 622. protruding block; 6221. buffer block; 6222. ring body; 63. unloading pipeline; 64. pressure relief spring; 7. cover plate; 71. buffer groove; 72. threaded adjusting rod; 721. support plate; 722. lock nut. Detailed implementation manners

[0029] The following further elaborates on this application Figures 1 - 3 in conjunction with the attached drawings.

[0030] The embodiment of this application discloses a throttle control system for a high-pressure cleaning machine.

[0031] Refer to Figure 1 , Figure 2 and Figure 3, A throttle control system for a high-pressure washer, comprising a gasoline engine 1, a high-pressure pump 2 and a spray gun 3. The high-pressure pump 2 is driven by the gasoline engine 1, and the output end of the high-pressure pump 2 is connected to the spray gun 3 through a high-pressure pipeline 21. An integrated valve 4 is installed on the high-pressure pipeline 21. The integrated valve 4 integrates a throttle control valve 5 and a pressure relief valve 6. Symmetrical openings are provided on the high-pressure pipeline 21 to communicate with the throttle control valve 5 and the pressure relief valve 6 respectively; Throttle control valve 5, the throttle control valve 5 includes a control valve body 51. One end of the control valve body 51 is installed with an adjusting screw 52, and the adjusting screw 52 is fixedly connected to a limit block 53 inside the control valve body 51. The other end of the control valve body 51 is installed with a wire cable 54, and one end of the wire cable 54 is communicated with the high-pressure pipeline 21. The wire cable 54 is fixedly connected to a slider 55 inside the control valve body 51, and the other end is connected to the gasoline engine 1; Slider 55, the slider 55 includes a sliding sleeve 551 fixedly installed inside the control valve body 51 and a block 552 inside the sliding sleeve 551. The block 552 is pressed against the limit block 53 through a control spring 56. A plurality of groups of positioning protrusions 57 are evenly distributed along the length direction of the inner wall of the control valve body 51. Each group of positioning protrusions 57 includes several elastic protrusions 571 arranged in a circumferential array on the inner wall. Positioning grooves 5521 adapted to the elastic protrusions 571 are provided on both sides of the block 552. An elastic member 572 extending from the groove body on the inner wall of the control valve body 51 and an elastic surface 573 located at the outlet of the groove body are provided inside the positioning protrusion 57; Pressure relief valve 6, the pressure relief valve 6 includes a valve cavity 61 and a valve block 62. The valve cavity 61 is integrally formed with the control valve body 51. A perforation provided on the side of the valve cavity 61 is communicated with the water inlet tank through a pressure relief pipeline 63. The valve block 62 is slidably installed inside the valve cavity 61 and the valve block 62 is connected to one end of the valve cavity 61 away from the water inlet through a pressure relief spring 64. In the throttle control system of the high-pressure washer, the gasoline engine 1 provides power for the high-pressure pump 2, and the spray gun 3 is connected to the high-pressure pump 2 through the high-pressure pipeline 21. After the spray gun 3 is opened, the high-pressure pipeline 21 can transfer the liquid in the water inlet tank into the spray gun 3 under the action of the high-pressure pump 2 and export it for high-pressure cleaning. The integrated valve 4 installed on the high-pressure pipeline 21 adopts a combined structure of a throttle control valve 5 and a pressure relief valve 6. The design of the integrated valve 4 can reduce the connection points on the high-pressure pipeline 21 connected to the valve to one place, simplify the structure on the high-pressure pipeline 21, and reduce the maintenance cost of the equipment. One end of the control valve body 51 in the throttle control valve 5 uses the adjusting screw 52 to adjust the position of the limit block 53 inside the control valve body 51. One end of the slider 55 inside the control valve body 51 is connected to the limit block 53 through a control spring 56, and the other end is connected to the gasoline engine 1 through a wire cable 54. The limit block 53 is used to be connected to the slider 55 inside the control valve body 51 through a control spring 56. By adjusting the position of the limit block 53, the distance of the wire cable 54 can be adjusted, so as to control the distance of the piston to adapt to the throttle distance of the gasoline engine 1.The slider 55 includes a sliding sleeve 551 inside the control valve body 51 and a block 552 slidably installed inside the sliding sleeve 551. The block 552 abuts against the limit block 53 through a control spring 56. One end of the steel wire cable 54 where the block 552 is located communicates with the high-pressure pipeline 21. When the liquid in the high-pressure pipeline 21 acts on the block 552, it can drive the block 552 to slide inside the sliding sleeve 551 and the control valve body 51. The positioning groove 5521 on the block 552 can be adapted to the positioning protrusion 57 on the inner wall of the control valve body 51. When the slider 55 moves under the pressure of the liquid in the high-pressure pipeline 21, the positioning protrusion 57 can cooperate with the positioning groove 5521 on the block 552. The positioning protrusion 57 can briefly limit the movement of the block 552, and then overcome the acting force of several elastic bumps 571 arranged in a circumferential array in the positioning protrusion 57. The movement of the block 552 squeezes the elastic member 572 inside the elastic surface 573, realizing that the action of pulling the steel wire cable 54 is divided into multiple times, reducing the degree of wear of the mechanical components of the gasoline engine 1 when the throttle is pulled to the maximum at one time. A valve block 62 is slidably installed inside the valve cavity 61 of the pressure relief valve 6. The valve block 62 moves inside the valve cavity 61 after being pressured by the liquid in the high-pressure pipeline 21. When the pressure in the high-pressure pipeline 21 reaches a certain value, the valve block 62 can squeeze the pressure relief spring 64 and move to communicate the perforation on the side of the valve cavity 61 with the high-pressure pipeline 21, thereby connecting the high-pressure pipeline 21 with the unloading pipeline 63, and unloading the high-pressure pipeline 21 through the unloading pipeline 63.

[0032] Refer to Figure 1, the control valve body 51 adopts a split structure, including an adjustment end 58 and an acting end 59. Both ends of the slider 55 are fixedly connected to the inner side walls of the adjustment end 58 and the acting end 59 respectively, and the inner diameter of the sliding sleeve 551 is the same as that of the adjustment end 58. The block 552 can slide between the sliding sleeve 551 and the adjustment end 58. Positioning blocks 531 are installed on both the limit block 53 of the adjustment end 58 and the end of the block 552 facing the adjustment end 58. Both ends of the control spring 56 are sleeved on the positioning blocks 531, and the sum of the lengths of the positioning blocks 531 is the compression limit of the control spring 56. The outer side surface of the sliding sleeve 551 is fixedly connected to the inner side surfaces of the adjustment end 58 and the acting end 59 through screws 5511. A space for accommodating high-pressure liquid is provided between the bottom of the sliding sleeve 551 and the acting end 59, and a perforation communicating with the high-pressure pipeline 21 is provided on the side surface of the acting end 59. The control valve body 51 adopts a split structure. The adjustment end 58 and the acting end 59 are connected through the slider 55 and fixedly connected through screws 5511. The inner diameter of the sliding sleeve 551 is designed to be the same as that of the adjustment end 58, which facilitates the stable sliding of the block 552 in the sliding sleeve 551 and the adjustment end 58. The minimum distance between the block 552 and the limit block 53 is restricted by the positioning blocks 531 on the limit block 53 and the block 552. The compression range of the control spring 56 is restricted within the compression limit of the spring, avoiding plastic deformation of the spring and affecting the normal operation of the throttle control valve 5. The space for accommodating high-pressure liquid is provided at the bottom of the acting end 59, and high-pressure liquid is introduced through the perforation on its side surface, thereby driving the block 552 to slide in the sliding sleeve 551.

[0033] Refer to Figure 1, a pressure relief valve 6 is installed on one side of the high-pressure pipeline 21 away from the perforation on the throttle control valve 5, and the pressure relief valve 6 is integrally formed with the adjustment end 58 of the throttle control valve 5. A cover plate 7 is detachably installed on the top of the valve cavity 61 of the pressure relief valve 6, wherein the cover plate 7 is threadedly connected to the end of the valve cavity 61. A buffer groove 71 is installed inside the cover plate 7, and the buffer groove 71 is integrally formed with the inner wall of the cover plate 7. Inside the buffer groove 71, a valve block 62 slidably installed in the buffer groove 71 is connected through a pressure relief spring 64. The valve block 62 includes a main body 621 adapted to the inner diameter of the valve cavity 61 and a raised block 622 slidably connected to the buffer groove 71. The raised block 622 includes a buffer block 6221 adapted to the inner diameter of the buffer groove 71 and a ring body 6222 adapted to the outer diameter of the buffer groove 71. The length of the buffer block 6221 is the same as that of the ring body 6222, and the buffer block 6221 is connected to the bottom of the buffer groove 71 through the pressure relief spring 64. A threaded adjustment rod 72 penetrates through the center of the top of the cover plate 7. One end of the threaded adjustment rod 72 is connected to a support plate 721 at the bottom of the buffer groove 71, and the other side of the support plate 721 is connected to the pressure relief spring 64. The outer end of the threaded adjustment rod 72 is locked by a locking nut 722. The connection ports led out from the high-pressure pipeline 21 are respectively communicated with the perforations on the throttle control valve 5 and the pressure relief valve 6, and the valve cavity 61 of the pressure relief valve 6 is integrally formed with the adjustment end 58, ensuring the stability of the single outlet on the high-pressure pipeline 21 connecting the pressure relief valve 6 and the throttle control valve 5. The cover plate 7 threadedly connected to the top of the pressure relief valve 6 is detachably installed at one end of the pressure relief valve 6 away from the water inlet. Inside the buffer groove 71 installed inside the cover plate 7, the main body 621 of the valve block 62 is connected through the pressure relief spring 64. The pressure relief spring 64 is sleeved on the buffer block 6221 on the main body 621. The buffer block 6221 slides inside the buffer groove 71, and the ring body 6222 around the buffer block 6221 cooperates with the outer side wall of the buffer groove 71, thereby controlling the stable movement of the main body 621 of the valve block 62 inside the valve cavity 61. And a threaded adjustment rod 72 capable of adjusting the position of the support plate 721 at the bottom of the buffer groove 71 is also installed on the top of the cover plate 7. The outer end of the threaded adjustment rod 72 is locked on the cover plate 7 by a locking nut 722, and the height of the bottom surface of the buffer groove 71 can be adjusted, so as to adjust the pressure required for the main body 621 to press on the pressure relief spring 64 during pressure relief, and realize the adjustment of the required pressure for the pressure relief valve 6 to relieve pressure.

[0034] Refer to Figure 1, an installation groove 5522 for fixing the steel wire cable 54 is provided on the block 552, and a bolt 5523 for fixing the steel wire cable 54 is installed on the end side of the block 552. The bottom surface of the slider 55 is located above the perforation, and the block 552 extends to be close to the bottom of the control valve body 51, wherein an arc transition is provided between the protruding end of the block 552 and the slider 55. The installation groove 5522 at the bottom of the block 552 is used to install the steel wire cable 54 and is fixed by the bolt 5523, which facilitates the subsequent replacement and maintenance of the steel wire cable 54. Moreover, the bottom surface of the slider 55 is located above the perforation of the control valve body 51, and an arc transition is provided between the protruding end of the block 552 and the slider 55. When the liquid in the high-pressure pipeline 21 is led out from the perforation, it can stably act on the block 552 in the slider 55 from the bottom.

[0035] Working principle: The high-pressure pump 2 is connected to the spray gun 3 of the high-pressure cleaner. When the high-pressure cleaner is started, the gasoline engine 1 works to drive the water in the water inlet tank into the high-pressure pipeline 21. At this time, the throttle control valve 5 is pulled by the pressure of the liquid in the high-pressure pipeline 21 to drive the throttle of the gasoline engine 1, increasing the rotation speed of the gasoline engine 1 driving the high-pressure pump 2, thereby increasing the pressure of the liquid in the high-pressure pipeline 21. The spray gun 3 can output liquid with a greater pressure. Then, under the action of the throttle control valve 5, the throttle of the gasoline engine 1 is stretched to the maximum. When the spray gun 3 is not opened, the pressure relief valve 6 can relieve the pressure of the liquid in the high-pressure pipeline 21, and the high-pressure liquid is relieved to the water inlet tank through the pressure relief pipeline.

[0036] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A throttle control system for a high-pressure cleaning machine, comprising a gasoline engine (1), a high-pressure pump (2) and a spray gun (3), characterized in that: The high-pressure pump (2) is driven by the gasoline engine (1), and the output end of the high-pressure pump (2) is connected to the spray gun (3) through a high-pressure pipeline (21), wherein an integrated valve (4) is installed on the high-pressure pipeline (21), and the integrated valve (4) integrates a throttle control valve (5) and a pressure relief valve (6), and the high-pressure pipeline (21) is provided with symmetrical openings respectively connected to the throttle control valve (5) and the pressure relief valve (6); A throttle control valve (5), the throttle control valve (5) comprising a control valve body (51), one end of the control valve body (51) being mounted with an adjusting screw (52), the adjusting screw (52) being fixedly connected to a limit block (53) in the control valve body (51), the other end of the control valve body (51) being mounted with a steel wire (54), one end of the steel wire (54) being connected to a high-pressure pipeline (21), the steel wire (54) being fixedly connected to a slider (55) in the control valve body (51), and the other end of the steel wire (54) being connected to a gasoline engine (1); A slider (55), the slider (55) comprising a sleeve (551) fixedly mounted in a control valve body (51) and a block (552) in the sleeve (551), wherein the block (552) is pressed against a limit block (53) via a control spring (56), a plurality of groups of positioning protrusions (57) are evenly distributed on the inner wall of the control valve body (51) along its length direction, each group of positioning protrusions (57) comprises a plurality of elastic protrusions (571) arranged in a circumferential array on the inner wall, positioning grooves (5521) adapted to the elastic protrusions (571) are provided on both sides of the block (552), and an elastic member (572) extending from a groove on the inner wall of the control valve body (51) and an elastic surface (573) located at an outlet of the groove are provided in the positioning protrusion (57); A pressure relief valve (6), the pressure relief valve (6) comprising a valve chamber (61) and a valve block (62), wherein the valve chamber (61) and the control valve body (51) are integrally formed, a through hole provided on the side of the valve chamber (61) is connected to a water inlet pool via a load-relief pipe (63), the valve block (62) is slidably mounted in the valve chamber (61), and the valve block (62) is connected to an end of the valve chamber (61) away from the water inlet via a pressure relief spring (64).

2. A high pressure cleaning machine throttle control system according to claim 1, characterized in that: The control valve body (51) adopts a split structure, including an adjusting end (58) and an acting end (59), the two ends of the slider (55) are respectively fixedly connected to the inner side walls of the adjusting end (58) and the acting end (59), and the inner diameter of the sliding sleeve (551) is the same as that of the adjusting end (58), and the block (552) can slide between the sliding sleeve (551) and the adjusting end (58).

3. A high pressure cleaning machine throttle control system according to claim 2, characterized in that: A positioning block (531) is installed on the limit block (53) of the adjustment end (58) and the end of the block body (552) facing the adjustment end (58), and both ends of the control spring (56) are sleeved on the positioning block (531), and the sum of the lengths of the positioning block (531) is the compression limit of the control spring (56).

4. A high pressure cleaning machine throttle control system according to claim 2, characterized in that: The outer side surface of the sliding sleeve (551) is fixedly connected to the inner side surfaces of the adjusting end (58) and the action end (59) respectively by screws (5511), wherein a space for accommodating high-pressure liquid is provided between the bottom of the sliding sleeve (551) and the action end (59), and a through hole communicating with the high-pressure pipeline (21) is provided on the side surface of the action end (59).

5. A high pressure cleaning machine throttle control system according to claim 2, characterized in that: A pressure relief valve (6) is installed on the side of the high-pressure pipeline (21) away from the perforation on the throttle control valve (5), and the pressure relief valve (6) and the regulating end (58) of the throttle control valve (5) are integrally formed.

6. A high pressure cleaning machine throttle control system according to claim 5, characterized in that: A cover plate (7) is detachably mounted on the top of the valve cavity (61) of the pressure relief valve (6), wherein the cover plate (7) is threadedly connected to the end of the valve cavity (61), a buffer groove (71) is mounted in the cover plate (7), and the buffer groove (71) and the inner wall of the cover plate (7) are integrally formed, wherein the buffer groove (71) is connected to a valve block (62) slidably mounted in the buffer groove (71) via a pressure relief spring (64), and the valve block (62) comprises a main body (621) adapted to the inner diameter of the valve cavity (61) and a protruding block (622) slidably connected to the buffer groove (71).

7. A high pressure cleaning machine throttle control system according to claim 6, characterized in that: The protruding block (622) comprises a buffer block (6221) adapted to the inner diameter of the buffer groove (71) and a ring body (6222) adapted to the outer diameter of the buffer groove (71), wherein the length of the buffer block (6221) is the same as the length of the ring body (6222), and the buffer block (6221) is connected to the bottom of the buffer groove (71) via a pressure relief spring (64).

8. A high pressure cleaning machine throttle control system according to claim 7, characterized in that: A threaded adjustment rod (72) passes through the center of the top of the cover plate (7), one end of the threaded adjustment rod (72) is connected to a support plate (721) at the bottom of the buffer groove (71), and the other side of the support plate (721) is connected to a pressure relief spring (64), wherein the outer end of the threaded adjustment rod (72) is locked by a locking nut (722).

9. A high pressure cleaning machine throttle control system according to claim 1, characterized in that: The block (552) is provided with a mounting groove (5522) for fixing the steel wire (54), and a bolt (5523) for fixing the steel wire (54) is installed on the side surface of the end of the block (552).

10. A high pressure cleaning machine throttle control system according to claim 9, characterized in that: The bottom surface of the slider (55) is located above the through hole, and the block body (552) extends to the bottom close to the control valve body (51), wherein the protruding end of the block body (552) is provided with an arc transition with the slider (55).

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