A high pressure washer throttle control system

Abstract

The application relates to the technical field of cleaning equipment, and relates to a high-pressure cleaning machine throttle control system. 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, and an integrated valve is arranged on the high-pressure pipeline. The integrated valve integrates a throttle control valve and a pressure relief valve, and the high-pressure pipeline communicates the throttle control valve and the pressure relief valve. The throttle control valve comprises a control valve body, one end of the control valve body is provided with an adjusting screw rod, the adjusting screw rod is fixedly connected with a limiting block in the control valve body, and the other end of the control valve body is provided with a steel wire stay. The sliding block comprises a sliding sleeve and a block body, the block body is abutted against the limiting block through a control spring, the inner wall of the control valve body is provided with a plurality of groups of positioning protrusions, each group of the positioning protrusions comprises a plurality of elastic protrusions, and the block body is provided with positioning grooves on both sides. The pressure relief valve comprises a valve cavity and a valve block, and the valve cavity is integrally formed with the control valve body. The application sets the throttle control valve in the high-pressure cleaning machine, effectively reduces the maintenance cost of the equipment and the gasoline engine, and improves the oil saving rate of the gasoline engine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cleaning equipment, in particular to a high-pressure cleaning machine throttle control system. BACKGROUND

[0002] In the cleaning process, whether the spray gun is on or off, the engine is always in high-speed operation, and the pump outlet is always kept at high pressure. This not only wastes energy, but also greatly reduces the service life of the pump because the pump outlet pressure cannot be unloaded. Therefore, a high-pressure cleaning machine throttle control system is needed to automatically adjust the engine speed and pump outlet pressure according to the work needs.

[0003] The high-pressure cleaning machine throttle control system disclosed in Chinese patent CN101109331A is a kind of high-pressure cleaning machine throttle control system. The high-pressure pump is driven by the engine, the high-pressure pump outlet is connected to the inlet of the overflow unloading valve through the high-pressure pipeline, an unloading pipeline is connected between the high-pressure pipeline and the inlet of the high-pressure pump, the outlet of the overflow unloading valve is connected to the spray gun through the outlet pipeline, and the other outlet of the high-pressure pump is provided 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 pump outlet pressure is rapidly unloaded, and the engine speed is adjusted to idle speed. When the spray gun is opened, the pump outlet pressure rapidly rises to the working pressure, and the engine speed rises to high speed. When the operator adjusts the cleaning pressure, the engine throttle can be automatically adjusted to the position corresponding to the cleaning pressure.

[0004] In the prior art, the throttle control valve is directly installed on the high-pressure pipeline, and the liquid pressure in the high-pressure pipeline during the opening and closing of the cleaning machine is directly adjusted to the steel wire puller of the gasoline engine. The throttle control valve on the high-pressure pipeline pulls the throttle of the gasoline engine to increase, and the throttle of the gasoline engine is pulled to increase during the opening of the cleaning machine, so that the speed of the gasoline engine increases to increase the power of the high-pressure pump driven by the gasoline engine, and the liquid with greater pressure is provided in the high-pressure pipeline. At this time, the high-pressure liquid in the high-pressure pipeline cannot act on the throttle control valve which has reached the maximum range. Therefore, a throttle control valve capable of pulling the steel wire puller multiple times is needed to reduce the wear degree of the mechanical parts of the gasoline engine when the throttle is pulled to the maximum once, and to improve the service life of the gasoline engine. SUMMARY

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

[0006] The high-pressure cleaning machine throttle control system provided by the present application adopts the following technical scheme:

[0007] A high-pressure cleaning machine throttle control system, comprising a gasoline engine, a high-pressure pump and a spray gun, the high-pressure pump is driven by the gasoline engine, the output end of the high-pressure pump is communicated with the spray gun through a high-pressure pipeline, wherein an integrated valve is installed on the high-pressure pipeline, the integrated valve integrates a throttle control valve and a pressure relief valve, and symmetric openings are arranged on the high-pressure pipeline to communicate the throttle control valve and the pressure relief valve respectively; the throttle control valve comprises a control valve body, an adjusting screw is installed at one end of the control valve body, the adjusting screw is fixedly connected with a limiting block in the control valve body, a steel wire puller is installed at the other end of the control valve body, one end of the steel wire puller is communicated with the high-pressure pipeline, the steel wire puller is fixedly connected with a sliding block in the control valve body, and the other end of the steel wire puller is connected with the gasoline engine; the sliding block comprises 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 uniformly distributed on the inner wall of the control valve body along the length direction, each group of positioning protrusions comprises a plurality of elastic blocks arranged in a circumferential array on the inner wall, positioning grooves adapted to the elastic blocks are arranged on both sides of the block body, and the positioning protrusions are provided with elastic members extended out of the groove on the inner wall of the control valve body and elastic surfaces at the outlet of the groove; the pressure relief valve comprises a valve cavity and a valve block, the valve cavity is integrally formed with the control valve body, a through hole arranged on the side surface of the valve cavity is communicated with a water inlet through a unloading pipeline, and the valve block is slidingly installed in the valve cavity and connected with the end of the valve cavity far away from the water inlet through a pressure relief spring.

[0008] By adopting the technical scheme, the gasoline engine provides power for the high-pressure pump in the oil control system of the high-pressure cleaning machine, the spray gun is connected with the high-pressure pump through the high-pressure pipeline, and the high-pressure pipeline can transmit the liquid in the water pool to the spray gun under the action of the high-pressure pump to discharge for high-pressure cleaning after the spray gun is opened. The integrated valve installed on the high-pressure pipeline adopts a combined structure of an oil control valve and a pressure relief valve. The design of the integrated valve can reduce the connection position of the high-pressure pipeline and the valve to one, simplify the structure of the high-pressure pipeline, and reduce the maintenance cost of the equipment. One end of the control valve body in the oil control valve adopts an adjusting screw to adjust the position of the limiting block in the control valve body. One end of the slider in the control valve body is connected with the limiting block through a control spring, and the other end is connected with the gasoline engine through a steel wire pull. The limiting block is used to be connected with the slider in the control valve body through the control spring. The position of the limiting block can be adjusted to adjust the distance of the steel wire pull, so as to control the distance of the piston to adapt to the distance of the gasoline engine oil control. The slider includes a sliding sleeve in the control valve body and a block body slidingly installed in the sliding sleeve. The block body is abutted with the limiting block through the control spring. The block body is connected with the high-pressure pipeline at one end of the steel wire pull. When the liquid in the high-pressure pipeline acts on the block body, the block body can be driven to slide in the sliding sleeve and the control valve body. The positioning groove on the block body can be matched with 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 be matched with the positioning groove on the block body. The positioning protrusion can temporarily limit the movement of the block body, and then overcome the force of the plurality of elastic blocks in the circumferential array of the positioning protrusion. The movement of the block body extrudes the elastic element in the elastic surface, realizes the action of pulling the steel wire pull in multiple times, and reduces the wear degree of the mechanical parts of the gasoline engine when the oil control is pulled to the maximum at one time.

[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 with the inner side walls of the adjusting end and the acting end, and the inner diameter of the sliding sleeve is the same as that of the adjusting end. The block body can slide between the sliding sleeve and the adjusting end.

[0010] Preferably, the limiting block of the adjusting end and one end of the block body towards the adjusting end are both provided with a positioning block, both ends of the control spring are sleeved on the positioning blocks, and the length of the positioning block is equal to the compression limit of the control spring.

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

[0012] By adopting the technical scheme, the control valve body adopts a split structure, the adjusting end and the acting end are connected through the sliding block, and are fixedly connected through the screw, the inner diameter of the sliding sleeve is designed to be the same as that of the adjusting end, the block body in the sliding sleeve is facilitated to stably slide in the sliding sleeve and the adjusting end, the minimum distance between the block body and the limiting block is limited through the limiting block and the positioning block on the block body, the compression range of the control spring is limited within the compression limit of the spring, plastic deformation of the spring is avoided, and normal operation of the throttle control valve is ensured. The space for accommodating high-pressure liquid is arranged at the bottom of the acting end, the high-pressure liquid is introduced into the space through the perforations on the side of the space, and the block body is driven to slide in the sliding sleeve.

[0013] Preferably, a pressure relief valve is mounted on the high-pressure pipeline away from the perforations on the throttle control valve, and the pressure relief valve is integrally formed with the adjusting end of the throttle control valve.

[0014] Preferably, a cover plate is detachably mounted on the top of the valve cavity of the pressure relief valve, the cover plate is threadedly connected with the end of the valve cavity, a buffer groove is mounted in the cover plate, the buffer groove is integrally formed with the inner wall of the cover plate, a valve block is slidably mounted in the buffer groove and connected with the buffer spring in the buffer groove, and the valve block comprises a main body matched with the inner diameter of the valve cavity and a protruding block slidably connected with the buffer groove.

[0015] Preferably, the protruding block comprises a buffer block matched with the inner diameter of the buffer groove and a ring body matched with 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 with the bottom of the buffer groove through the buffer spring.

[0016] Preferably, a threaded adjusting rod is penetrated through the center of the top of the cover plate, one end of the threaded adjusting rod is connected with a support plate at the bottom of the buffer groove, the other side of the support plate is connected with the buffer spring, and the outer end of the threaded adjusting rod is locked by a lock nut.

[0017] By adopting the technical scheme, the connection ports led out of 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 adjusting end, so that the stability of the single outlet of the high-pressure pipeline connected with the pressure relief valve and the throttle control valve is ensured. The cover plate threadedly connected with the top of the pressure relief valve is detachably mounted on the end of the pressure relief valve away from the water inlet, the buffer groove mounted in the cover plate is connected with the main body of the valve block through the buffer spring, the buffer spring is sleeved on the buffer block on the main body, the buffer block slides in the buffer groove, the ring body around the buffer block cooperates with the outer sidewall of the buffer groove, so that the stable movement of the main body of the valve block in the valve cavity is controlled. The threaded adjusting rod for adjusting the position of the support plate at the bottom of the buffer groove is further mounted on the top of the cover plate, the outer end of the threaded adjusting rod is locked on the cover plate by the lock nut, the height of the bottom surface of the buffer groove can be adjusted, the pressure required by the main body on the buffer spring during pressure relief is adjusted, and the required pressure for pressure relief of the pressure relief valve is adjusted.

[0018] Preferably, the block is provided with a mounting groove for fixing the steel wire pull, and the end side of the block is provided with a bolt for fixing the steel wire pull.

[0019] Preferably, the bottom surface of the sliding block is located above the through hole, and the block extends to the bottom of the control valve body, wherein the extending end of the block is provided with an arc-shaped transition with the sliding block.

[0020] By adopting the above technical scheme, the mounting groove at the bottom of the block is used for installing the steel wire pull, and the steel wire pull is fixed by the bolt, which facilitates subsequent replacement and maintenance of the steel wire pull. In addition, the bottom surface of the sliding block is located above the through hole of the control valve body, and the extending end of the block is provided with an arc-shaped transition with the sliding block. When the liquid in the high-pressure pipeline is discharged from the through hole, the block in the sliding block can stably act from the bottom.

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

[0022] 1. The oil-saving throttle control valve installed on the gasoline engine can reduce the rotation speed and power of the gasoline engine when the high-pressure cleaning machine gun is not working, thereby saving oil and increasing the rotation speed to the rated value when the gun is fired again.

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

[0024] 3. The present application realizes the action of pulling the steel wire pull in multiple times, thereby reducing the wear degree of the mechanical parts of the gasoline engine when the throttle is pulled to the maximum once. BRIEF DESCRIPTION OF DRAWINGS

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

[0026] Figure 2 is Figure 1 a schematic diagram of the structure of an elastic lug;

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

[0028] Explanation 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, limiting block; 531, positioning block; 54, steel wire stay; 55, sliding block; 551, sliding sleeve; 5511, screw; 552, block body; 5521, positioning groove; 5522, mounting groove; 5523, bolt; 56, control spring; 57, positioning protrusion; 571, elastic block; 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, locking nut. DETAILED DESCRIPTION

[0029] The following will be described in detail below with reference to the accompanying drawings. Figures 1-3 The present application is further described in detail.

[0030] The embodiments of the present application disclose a throttle control system of a high-pressure cleaning machine.

[0031] Reference is made to Figure 1 , Figure 2 and Figure 3The utility model provides a kind of high-pressure washer throttle control system, including gasoline engine 1, high-pressure pump 2 and lance 3, high-pressure pump 2 is driven by gasoline engine 1, the output of high-pressure pump 2 is communicated with lance 3 by high-pressure pipeline 21, wherein integrated valve 4 is installed on high-pressure pipeline 21, integrated valve 4 integrates throttle control valve 5 and pressure relief valve 6, and symmetric opening is equipped on high-pressure pipeline 21 and is communicated throttle control valve 5 and pressure relief valve 6 respectively;Throttle control valve 5, throttle control valve 5 includes control valve body 51, one end of control valve body 51 is equipped with adjusting screw 52, adjusting screw 52 is fixedly connected with the limiting block 53 in control valve body 51, and the other end of control valve body 51 is equipped with steel wire pull line 54, and one end of steel wire pull line 54 is communicated with high-pressure pipeline 21, wherein steel wire pull line 54 is fixedly connected with the slider 55 in control valve body 51, and the other end is connected with gasoline engine 1;Slider 55, slider 55 includes sliding sleeve 551 fixedly installed in control valve body 51 and block 552 in sliding sleeve 551, wherein block 552 is abutted by control spring 56 with limiting block 53, and the inner wall of control valve body 51 is evenly distributed with multiple sets of positioning protrusions 57 along its length direction, each set of positioning protrusions 57 includes a plurality of elastic lugs 571 in circumferential array on the inner wall, and positioning recess 5521 adapted with elastic lug 571 is provided on the both sides of block 552, and the inner of positioning protrusions 57 is provided with elastic element 572 extended from the groove in the inner wall of control valve body 51 and elastic face 573 located at the outlet of groove;Pressure relief valve 6, pressure relief valve 6 includes valve cavity 61 and valve block 62, wherein valve cavity 61 is integrally formed with control valve body 51, and the perforation opened in the side of valve cavity 61 is communicated with water pool by unloading pipeline 63, and valve block 62 is slidably installed in valve cavity 61, and valve block 62 is connected with the one end of valve cavity 61 away from water inlet by pressure relief spring 64.The gasoline engine 1 of high-pressure washer throttle control system provides power for high-pressure pump 2, and lance 3 is connected with high-pressure pump 2 by high-pressure pipeline 21, and high-pressure pipeline 21 can transmit the liquid in water pool to lance 3 under the action of high-pressure pump 2 after opening lance 3 to carry out high-pressure cleaning.The integrated valve 4 installed on high-pressure pipeline 21 adopts the combined structure of throttle control valve 5 and pressure relief valve 6, and the design of integrated valve 4 can reduce the place connected with valve on high-pressure pipeline 21 to one, simplify the structure on high-pressure pipeline 21, and reduce the maintenance cost of equipment.The one end of control valve body 51 in throttle control valve 5 adopts adjusting screw 52 to adjust the position of limiting block 53 in control valve body 51, the one end of slider 55 in control valve body 51 is connected with limiting block 53 by control spring 56, and the other end is connected with gasoline engine 1, limiting block 53 is used for being connected between slider 55 in control valve body 51 by control spring 56, and the distance of steel wire pull line 54 can be adjusted by adjusting the position of limiting block 53, to control the distance of piston to adapt the throttle distance of gasoline engine 1.The slider 55 comprises a sliding sleeve 551 in the control valve body 51 and a block 552 slidingly installed in the sliding sleeve 551, the block 552 abuts against the limiting block 53 through the control spring 56, the block 552 is located at one end of the steel wire cable 54 and communicates with the high-pressure pipeline 21, when the liquid in the high-pressure pipeline 21 acts on the block 552, the block 552 can be driven to slide in the sliding sleeve 551 and the control valve body 51, the positioning groove 5521 on the block 552 can be matched with the positioning protrusion 57 on the inner wall of the control valve body 51, the positioning protrusion 57 can cooperate with the positioning groove 5521 on the block 552 when the slider 55 moves under the pressure of the liquid in the high-pressure pipeline 21, the positioning protrusion 57 can temporarily limit the movement of the block 552, then overcome the force of the plurality of elastic blocks 571 in the circumferential array of the positioning protrusion 57, the movement of the block 552 extrudes the elastic member 572 in the elastic surface 573, the action of pulling the steel wire cable 54 is divided into multiple times, and the degree of wear of the mechanical parts of the gasoline engine 1 is reduced when the accelerator is pulled to the maximum once. The valve block 62 is slidingly installed in the valve cavity 61 in the pressure relief valve 6, the valve block 62 moves in the valve cavity 61 after being pressed 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 extrude 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, so as to communicate the high-pressure pipeline 21 with the unloading pipeline 63, and unload the high-pressure pipeline 21 through the unloading pipeline 63.

[0032] Referring to Figure 1, the control valve body 51 adopts a split structure, including the adjusting end 58 and the acting end 59, the two ends of the sliding block 55 are fixedly connected with the inner side walls of the adjusting end 58 and the acting end 59 respectively, the inner diameter of the sliding sleeve 551 is the same as that of the adjusting end 58, and the block body 552 can slide between the sliding sleeve 551 and the adjusting end 58. The limiting block 53 of the adjusting end 58 and the one end of the block body 552 towards the adjusting end 58 are both installed with the positioning block 531, the two ends of the control spring 56 are sleeved on the positioning block 531, and the length of the positioning block 531 is the compression limit of the control spring 56. The outer side surface of the sliding sleeve 551 is fixedly connected with the inner side surfaces of the adjusting end 58 and the acting end 59 through the screws 5511, wherein the bottom of the sliding sleeve 551 and the acting end 59 are provided with a space for accommodating high-pressure liquid, and the side surface of the acting end 59 is provided with a perforation in communication with the high-pressure pipeline 21. The control valve body 51 adopts a split structure, the adjusting end 58 and the acting end 59 are connected through the sliding block 55 and fixedly connected through the screws 5511, and the inner diameter of the sliding sleeve 551 is designed to be the same as that of the adjusting end 58, so that the block body 552 in the sliding sleeve 551 can stably slide in the sliding sleeve 551 and the adjusting end 58, and the minimum distance between the block body 552 and the limiting block 53 is limited through the positioning block 531 on the limiting block 53 and the block body 552, the compression range of the control spring 56 is limited within the compression limit of the spring, and plastic deformation of the spring is avoided to affect the normal operation of the throttle control valve 5. The space for accommodating high-pressure liquid is arranged at the bottom of the acting end 59, the high-pressure liquid is introduced through the perforation in the side surface to drive the block body 552 to slide in the sliding sleeve 551.

[0033] Referring to Figure 1, the relief valve 6 is integrally formed with the adjusting 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 relief valve 6, wherein the cover plate 7 is threadedly connected with the end of the valve cavity 61, a buffer groove 71 is installed in the cover plate 7, the buffer groove 71 is integrally formed with the inner wall of the cover plate 7, a valve block 62 is connected with the buffer groove 71 through a relief spring 64, 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 with the buffer groove 71. 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, the buffer block 6221 is connected with the bottom of the buffer groove 71 through the relief spring 64. A threaded adjusting rod 72 is penetrated through the center of the top of the cover plate 7, one end of the threaded adjusting rod 72 is connected with a support plate 721 at the bottom of the buffer groove 71, the other side of the support plate 721 is connected with the relief spring 64, wherein the outer end of the threaded adjusting rod 72 is locked by a locking nut 722. The connection ports led out of the high-pressure pipeline 21 are respectively communicated with the perforations on the throttle control valve 5 and the relief valve 6, and the valve cavity 61 of the relief valve 6 is integrally formed with the adjusting end 58, which ensures the stability of the single outlet of the high-pressure pipeline 21 connected with the relief valve 6 and the throttle control valve 5. The cover plate 7 threadedly connected with the top of the relief valve 6 is detachably installed on the end of the relief valve 6 away from the water inlet, the buffer groove 71 installed in the cover plate 7 is connected with the main body 621 of the valve block 62 through the relief spring 64, the relief spring 64 is sleeved on the buffer block 6221 on the main body 621, the buffer block 6221 slides in the buffer groove 71, the ring body 6222 around the buffer block 6221 cooperates with the outer side wall of the buffer groove 71, so as to control the stable movement of the main body 621 of the valve block 62 in the valve cavity 61. The threaded adjusting rod 72 for 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, wherein the outer end of the threaded adjusting rod 72 is locked on the cover plate 7 by the locking nut 722, the height of the bottom surface of the buffer groove 71 can be adjusted, so as to adjust the pressure required by the main body 621 to press the relief spring 64 during relief, and the required pressure of the relief valve 6 during relief is adjusted.

[0034] Referring to Figure 1The block 552 is provided with a mounting groove 5522 for fixing the steel wire cable 54, and the end side of the block 552 is provided with a bolt 5523 for fixing the steel wire cable 54. The bottom surface of the sliding block 55 is located above the through hole, and the block 552 extends to the bottom of the control valve body 51, wherein the extending end of the block 552 is provided with an arc-shaped transition with the sliding block 55. The mounting groove 5522 at the bottom of the block 552 is used to mount 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, and the bottom surface of the sliding block 55 is located above the through hole of the control valve body 51, and the extending end of the block 552 is provided with an arc-shaped transition with the sliding block 55. When the liquid in the high-pressure pipeline 21 is discharged from the through hole, the block 552 in the sliding block 55 can stably act from the bottom.

[0035] Working principle: The high-pressure pump 2 is connected to the spray gun 3 of the high-pressure cleaning machine. When the high-pressure cleaning machine is started, the gasoline engine 1 works to guide the water in the water pool into the high-pressure pipeline 21. At this time, the oil control valve 5 is pulled by the liquid pressure in the high-pressure pipeline 21 to pull the steel wire cable 54 to control the oil door of the gasoline engine 1, increase the 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, and the spray gun 3 can output liquid with greater pressure. Then, under the action of the oil control valve 5, the oil door of the gasoline engine 1 is pulled to the maximum, and the pressure relief valve 6 can relieve the liquid in the high-pressure pipeline 21 before the spray gun 3 is opened, and the high-pressure liquid is relieved to the water pool through the pressure relief pipeline.

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

Claims

1. A high pressure washer throttle control system comprising a gasoline engine (1), a high pressure pump (2) and a lance (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 communicated with the spray gun (3) through the high-pressure pipeline (21), wherein the high-pressure pipeline (21) is provided with an integrated valve (4), the integrated valve (4) is integrated with a throttle control valve (5) and a pressure relief valve (6), and the high-pressure pipeline (21) is provided with symmetrical openings respectively communicated with the throttle control valve (5) and the pressure relief valve (6); The throttle control valve (5) comprises a control valve body (51), one end of the control valve body (51) is provided with an adjusting screw rod (52), the adjusting screw rod (52) is fixedly connected with a limiting block (53) in the control valve body (51), the other end of the control valve body (51) is provided with a steel wire stay (54), one end of the steel wire stay (54) is communicated with the high-pressure pipeline (21), the steel wire stay (54) is fixedly connected with a sliding block (55) in the control valve body (51), and the other end of the steel wire stay (54) is connected with the gasoline engine (1); The sliding block (55) comprises a sliding sleeve (551) fixedly installed in the control valve body (51) and a block body (552) in the sliding sleeve (551), wherein the block body (552) is abutted against the limiting block (53) through a control spring (56), a plurality of groups of positioning protrusions (57) are uniformly distributed on the inner wall of the control valve body (51) along the 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) matched with the elastic protrusions (571) are formed on the two sides of the block body (552), and the positioning protrusions (57) are provided with elastic members (572) extended from the groove in the inner wall of the control valve body (51) and elastic surfaces (573) located at the outlet of the groove. The pressure relief valve (6) comprises a valve cavity (61) and a valve block (62), wherein the valve cavity (61) is integrally formed with the control valve body (51), a through hole formed in the side of the valve cavity (61) is communicated with the water inlet through a unloading pipeline (63), and the valve block (62) is slidably installed in the valve cavity (61) and connected with the end of the valve cavity (61) away from the water inlet through a pressure relief spring (64).

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

3. A high pressure washer throttle control system according to claim 2, wherein: The limiting block (53) of the adjusting end (58) and the end of the block body (552) facing the adjusting end (58) are both provided with positioning blocks (531), the two ends of the control spring (56) are sleeved on the positioning blocks (531), and the length of the positioning blocks (531) is equal to the compression limit of the control spring (56).

4. A high pressure washer throttle control system according to claim 2, wherein: The outer side of the sliding sleeve (551) is fixedly connected with the inner side of the adjusting end (58) and the acting end (59) through the screw (5511), wherein the bottom of the sliding sleeve (551) and the acting end (59) are provided with a space for accommodating high-pressure liquid, and the side of the acting end (59) is provided with a perforation in communication with the high-pressure pipeline (21).

5. A high pressure washer throttle control system according to claim 2, wherein: The high-pressure pipeline (21) is provided with a pressure relief valve (6) on the side away from the perforation of the throttle control valve (5), and the pressure relief valve (6) is integrally formed with the adjusting end (58) of the throttle control valve (5).

6. A high pressure washer throttle control system according to claim 5, wherein: The top of the valve cavity (61) of the pressure relief valve (6) is detachably provided with a cover plate (7), wherein the cover plate (7) is threadedly connected with the end of the valve cavity (61), the cover plate (7) is provided with a buffer groove (71) therein, the buffer groove (71) is integrally formed with the inner wall of the cover plate (7), the buffer groove (71) is connected with a valve block (62) slidably installed therein through a pressure relief spring (64), and the valve block (62) comprises a main body (621) matched with the inner diameter of the valve cavity (61) and a protruding block (622) slidably connected with the buffer groove (71).

7. A high pressure washer throttle control system according to claim 6, wherein: The protruding block (622) comprises a buffer block (6221) matched with the inner diameter of the buffer groove (71) and a ring body (6222) matched with 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 with the bottom of the buffer groove (71) through the pressure relief spring (64).

8. A high pressure washer throttle control system according to claim 7, wherein: The top center of the cover plate (7) is provided with a threaded adjusting rod (72), one end of the threaded adjusting rod (72) is connected with a supporting plate (721) at the bottom of the buffer groove (71), the other side of the supporting plate (721) is connected with the pressure relief spring (64), and the outer end of the threaded adjusting rod (72) is locked through a locking nut (722).

9. A high pressure washer throttle control system as defined in claim 1, wherein: The block body (552) is provided with a mounting groove (5522) for fixing the steel wire stay (54), and the end surface of the block body (552) is provided with a bolt (5523) for fixing the steel wire stay (54).

10. A high pressure washer throttle control system according to claim 9, wherein: The bottom surface of the sliding block (55) is located above the perforation, 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-shaped transition between the sliding block (55).

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