Spray gun special for self-service car washing

Abstract

The utility model relates to the technical field of spray guns, in particular to a special spray gun for self-service car washing, which comprises a spray gun body, sealing water leakage prevention mechanisms are arranged on the surfaces of a water spray head and a water outlet pipe, convenient replacement mechanisms are arranged on the inner wall of the spray gun body and the surface of a filter screen, and a stirring and scraping mechanism is arranged in a stirring box. According to the spray gun, the sealing effect between the water spraying head and the water outlet pipe is better when the spray gun is used, the phenomenon that cleaning water seeps from the water spraying head and the water outlet pipe in the use process of the spray gun is avoided, a user can conveniently disassemble, assemble and replace the filter screen when the spray gun is used, and the water can be purified and filtered; the phenomenon that the surface of the filter screen is blocked in the using process of the spray gun is avoided, cleaning liquid can be guided into the stirring box and the spray gun body according to needs when the spray gun is used, and the cleaning effect is better when the spray gun cleans an automobile.

Description

Technical Field

[0001] The utility model relates to the technical field of spray guns, in particular to a special spray gun for self-service car washing. Background Art

[0002] In recent years, self-service car wash machines are machines that use high-pressure water to clean cars. They are mainly composed of control systems, circuits, air circuits, water circuits and mechanical structures. Car wash machines have the characteristics of simple operation, beautiful appearance, and little damage to car paint. In recent years, they have been widely used in the automotive service industry. Now a special spray gun for self-service car washes is needed.

[0003] The existing spray guns still have some disadvantages to a certain extent. First, the spray guns have high requirements for their sealing when in use. The existing spray guns do not have a good enough sealing and leak-proof effect between the water spray head and the water outlet pipe, which easily leads to the phenomenon that cleaning water seeps out from between the water spray head and the water outlet pipe during the use of the spray gun; secondly, the spray gun needs to replace the filter screen regularly when in use. The replacement steps of the existing spray guns when replacing the filter screen are often cumbersome, which cannot achieve the effect of purifying and filtering water, and easily leads to the phenomenon that the surface of the filter screen is blocked during the use of the spray gun; thirdly, the existing spray guns do not have the function of mixing and stirring the cleaning liquid when in use, which makes it inconvenient to introduce the cleaning liquid into the mixing box and the inside of the spray gun body when the spray gun is in use, which reduces the cleaning effect of the spray gun when cleaning the car. Utility Model Content

[0004] The purpose of the utility model is to provide a spray gun for self-service car washing, so as to solve the problems proposed in the above-mentioned background technology that the sealing and leak-proof effect between the water spray head and the water outlet pipe when the spray gun is used is not good enough, the replacement steps when replacing the filter screen are often cumbersome, and the function of mixing and stirring the cleaning liquid is not available.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a spray gun for self-service car washing, comprising a spray gun body, a handle body is installed on the surface at the bottom of the spray gun body, a switch knob is arranged inside the handle body, the switch knob and the inner wall of the handle body are rotatably matched with each other, a water outlet pipe is installed on the surface of the spray gun body, a water spray head is arranged on the surface of the water outlet pipe, a filter is arranged inside the spray gun body, a stirring box is installed on the surface of the spray gun body, the stirring box is connected with the inside of the spray gun body, a stirring roller is arranged inside the stirring box, and the The stirring roller and the inner wall of the stirring box rotate with each other, the surface of the stirring roller is fixed to the surface of the rotating shaft, the surfaces of the water spray head and the water outlet pipe are both provided with a sealing and leak-proof mechanism, the interior of the sealing and leak-proof mechanism includes an installation groove, an anti-detachment clamp and a sealing and leak-proof part, the inner wall of the spray gun body and the surface of the filter net are both provided with a convenient replacement mechanism, the interior of the convenient replacement mechanism includes a positioning clamp, a fixing block and a convenient replacement group, the interior of the stirring box is provided with a stirring and scraping mechanism, the interior of the stirring and scraping mechanism includes a moving rod, a scraper body, a fixing cylinder and a stretching spring.

[0006] Preferably, one end of the water outlet pipe extends to the interior of the water spray head, the inner wall of the water spray head is provided with a through-hole body with equal intervals, the through-hole body is connected with the interior of the water spray head, a purification mesh plate is installed on the inner wall of the spray gun body, a driving motor is installed on the surface of the mixing box, the input end of the driving motor is electrically connected to the output end of the switch knob, a rotating shaft is installed on the output end of the driving motor through a coupling, and one end of the rotating shaft passes through the mixing box and extends to the interior of the mixing box, a feeding barrel is installed on the surface of the mixing box, and the feeding barrel is connected with the interior of the mixing box.

[0007] Preferably, the sealing and leak-proof part is arranged on the surface of the water spray head and the water outlet pipe, and the sealing and leak-proof part is composed of a sealing airbag, a sealing spring, a sealing frame and a sealing gasket. The surface of the water outlet pipe is provided with an installation groove, and the installation groove and the inner wall of the water spray head are slidably matched with each other. The inner wall of the water spray head is installed with an anti-detachment clamp for preventing the water spray head from loosening, and the anti-detachment clamp is engaged with the inner wall of the water outlet pipe, and the inner wall of the water spray head is installed with a sealing frame.

[0008] Preferably, a sealing gasket is provided inside the sealing frame, and the sealing gasket and the inner wall of the sealing frame are slidably matched with each other, the surface of the sealing gasket is in contact with the surface of the water outlet pipe, the inner wall of the sealing frame is installed with a sealing spring, one end of the sealing spring is fixed to the surface of the sealing gasket, and the inner wall of the sealing frame is installed with a sealing airbag, and the surface of the sealing airbag is fixed to the surface of the sealing gasket.

[0009] Preferably, the convenient replacement group is arranged on the inner wall of the spray gun body and the surface of the filter screen. The convenient replacement group is composed of a spring body, an arc-shaped clamp and a fixed groove. The inner wall of the spray gun body is provided with a fixed groove. The filter screen and the inner wall of the fixed groove are slidably matched with each other, and the inner wall of the spray gun body is installed with a fixed block.

[0010] Preferably, the surface of the fixed block is provided with an arc-shaped clamp, and the arc-shaped clamp and the surface of the filter are engaged with each other. The surface of the fixed block is installed with a spring body, one end of the spring body is fixed to the surface of the arc-shaped clamp, and the surface of the filter is installed with a positioning clamp, and the positioning clamp and the inner wall of the spray gun body are engaged with each other.

[0011] Preferably, the surface of the stirring roller is installed with fixed cylinders at equal intervals, and a moving rod is arranged inside the fixed cylinder. The moving rod and the inner wall of the fixed cylinder slide with each other, and a scraper body is arranged inside the stirring box for scraping off the cleaning liquid sticking to the inner wall of the stirring box.

[0012] Preferably, the scraper body contacts the inner wall of the mixing box, the surface of the moving rod is fixed to the surface of the scraper body, and a stretch spring is installed inside the fixing cylinder, and one end of the stretch spring is fixed to the surface of the moving rod.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the spray gun for self-service car washing not only makes the sealing effect between the water spray head and the water outlet pipe better when the spray gun is used, avoids the phenomenon of washing water seeping from between the water spray head and the water outlet pipe during the use of the spray gun, makes it convenient for the user to disassemble and replace the filter screen when the spray gun is used, can achieve the effect of purifying and filtering water, avoids the phenomenon of clogging on the surface of the filter screen during the use of the spray gun, and makes it possible to introduce washing liquid into the mixing box and the inside of the spray gun body as needed when the spray gun is used, so that the washing effect of the spray gun when washing the car is better;

[0014] 1. By providing a sealing and leak-proof mechanism, the user pushes the water spray head to make the water spray head slide inside the installation groove. Under the action of the installation groove, the water spray head is guided so that the water spray head drives the anti-dropping clamp to be clamped to the inner wall of the water outlet pipe. Under the action of the anti-dropping clamp, the water spray head is prevented from dropping off. At this time, the sealing gasket is driven to move under the joint action of the sealing airbag and the sealing spring inside the sealing frame, so that the sealing gasket moves to contact the surface of the water outlet pipe. Under the joint action of the sealing frame and the sealing gasket, the water spray head and the water outlet pipe are sealed and leak-proof to prevent the washing water from seeping out from between the water spray head and the water outlet pipe, thereby realizing the function of sealing and leak-proofing between the water spray head and the water outlet pipe by the spray gun, so that the sealing effect between the water spray head and the water outlet pipe is better when the spray gun is used, thereby preventing the washing water from seeping out from between the water spray head and the water outlet pipe during the use of the spray gun;

[0015] 2. By providing a convenient replacement mechanism, the user pulls the filter upward to make the filter slide inside the fixed groove. At this time, the arc-shaped clamp is driven to move under the elastic force of the spring body on the surface of the fixed block, so that the arc-shaped clamp moves to the side away from the filter, so that the arc-shaped clamp is away from the surface of the filter. At this time, when the filter moves inside the spray gun body, the filter drives the positioning clamp away from the inner wall of the spray gun body, so that the filter is pulled out from the inside of the spray gun body, and the filter is replaced, realizing the function of convenient replacement of the filter of the spray gun, so that the user can disassemble and replace the filter when using the spray gun, which can achieve the effect of purifying and filtering water and avoid the phenomenon of clogging of the surface of the filter during the use of the spray gun;

[0016] 3. By providing a stirring and scraping mechanism, when the stirring roller rotates inside the stirring box, the moving rod is driven to move under the elastic force of the extension spring inside the fixed cylinder, so that the moving rod slides on the inner wall of the fixed cylinder. When the moving rod moves, the moving rod drives the scraper body to move until it contacts the inner wall of the stirring box. Under the joint action of the moving rod and the scraper body, the cleaning liquid sticking to the inner wall of the stirring box is scraped off, so that the cleaning liquid and water inside the stirring box are mixed, and the function of the spray gun to mix and stir the cleaning liquid is realized, so that the spray gun can introduce cleaning liquid into the stirring box and the spray gun body as needed when in use, so that the spray gun has a better cleaning effect when cleaning the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0019] Figure 3 It is a side cross-sectional structural schematic diagram of the utility model;

[0020] Figure 4 For the utility model Figure 2 An enlarged structural diagram of the middle sealing and water-leakage-proof mechanism;

[0021] Figure 5 For the utility model Figure 2 The enlarged structural diagram of the convenient replacement mechanism;

[0022] Figure 6 It is an enlarged structural schematic diagram of the stirring and scraping mechanism of the utility model.

[0023] In the figure: 1. spray gun body; 101. handle body; 102. switch handle; 103. water spray head; 104. mixing box; 105. water outlet pipe; 106. through-hole body; 107. purification screen; 108. filter screen; 109. drive motor; 110. stirring roller; 2. sealing and anti-leakage mechanism; 201. installation groove; 202. anti-drop clamp; 203. sealing and anti-leakage part; 2031. sealing airbag; 2032. sealing spring; 2033. sealing frame; 2034. sealing pad; 3. convenient replacement mechanism; 301. positioning clamp; 302. fixing block; 303. convenient replacement group; 3031. spring body; 3032. arc clamp; 3033. fixing groove; 4. stirring and scraping mechanism; 401. moving rod; 402. scraper body; 403. fixing cylinder; 404. extension spring. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] The utility model provides a special spray gun for self-service car washing. Figure 1 and Figure 2 As shown, it includes a spray gun body 1, a handle body 101 is installed on the surface at the bottom position of the spray gun body 1, a switch knob 102 is arranged inside the handle body 101, the model of the switch knob 102 can be selected from the LA series, the switch knob 102 and the inner wall of the handle body 101 are rotatably matched with each other, a water outlet pipe 105 is installed on the surface of the spray gun body 1, a water spray head 103 is arranged on the surface of the water outlet pipe 105, one end of the water outlet pipe 105 extends to the inside of the water spray head 103, the inner wall of the water spray head 103 is provided with a through hole body 106 with equal spacing, the through hole body 106 is connected with the inside of the water spray head 103, a purification mesh plate 107 is installed on the inner wall of the spray gun body 1, a filter screen 108 is arranged inside the spray gun body 1, and the spray gun body 1 is provided with a filter screen 108. A stirring box 104 is installed on the surface of the body 1, and the stirring box 104 is connected with the interior of the spray gun body 1. A driving motor 109 is installed on the surface of the stirring box 104. The model of the driving motor 109 can be selected from the JO series. The input end of the driving motor 109 is electrically connected to the output end of the switch handle 102. The output end of the driving motor 109 is installed with a rotating shaft through a coupling, and one end of the rotating shaft passes through the stirring box 104 and extends to the interior of the stirring box 104. A feeding barrel is installed on the surface of the stirring box 104, and the feeding barrel is connected with the interior of the stirring box 104. A stirring roller 110 is arranged inside the stirring box 104. The stirring roller 110 and the inner wall of the stirring box 104 rotate with each other, and the surface of the stirring roller 110 is fixed to the surface of the rotating shaft.

[0026] Furthermore, if Figure 2 and Figure 4 As shown, the surfaces of the water spray head 103 and the water outlet pipe 105 are both provided with a sealing and leak-proof mechanism 2, the interior of the sealing and leak-proof mechanism 2 includes a mounting groove 201, an anti-dropping clamp 202 and a sealing and leak-proof portion 203, the sealing and leak-proof portion 203 is arranged on the surfaces of the water spray head 103 and the water outlet pipe 105, the sealing and leak-proof portion 203 is composed of a sealing airbag 2031, a sealing spring 2032, a sealing frame 2033 and a sealing pad 2034, the surface of the water outlet pipe 105 is provided with a mounting groove 201, the mounting groove 201 and the inner wall of the water spray head 103 are slidably matched with each other, and the inner wall of the water spray head 103 is installed with an anti-dropping clamp for preventing the water spray head 103 from loosening Part 202, the anti-slip clamp 202 and the inner wall of the water outlet pipe 105 are engaged with each other, the inner wall of the sprinkler head 103 is installed with a sealing frame 2033, and a sealing gasket 2034 is arranged inside the sealing frame 2033. The sealing gasket 2034 and the inner wall of the sealing frame 2033 slide with each other, and the surface of the sealing gasket 2034 contacts the surface of the water outlet pipe 105. The inner wall of the sealing frame 2033 is installed with a sealing spring 2032, and one end of the sealing spring 2032 is fixed to the surface of the sealing gasket 2034. The inner wall of the sealing frame 2033 is installed with a sealing airbag 2031, and the surface of the sealing airbag 2031 is fixed to the surface of the sealing gasket 2034.

[0027] During implementation, the user pushes the water spray head 103 to make the water spray head 103 slide inside the installation groove 201. Under the action of the installation groove 201, the water spray head 103 is guided, so that the water spray head 103 drives the anti-detachment clamp 202 to be clamped to the inner wall of the water outlet pipe 105, and the water spray head 103 is prevented from detaching under the action of the anti-detachment clamp 202. At this time, under the joint action of the sealing air bag 2031 and the sealing spring 2032 inside the sealing frame 2033, the sealing gasket 2034 is driven to move, so that the sealing gasket 2034 moves to contact the surface of the water outlet pipe 105, and under the joint action of the sealing frame 2033 and the sealing gasket 2034, the water spray head 103 and the water outlet pipe 105 are sealed and leak-proof, so as to avoid the phenomenon of cleaning water seeping out from between the water spray head 103 and the water outlet pipe 105, so as to realize the function of the spray gun to seal and prevent water leakage between the water spray head 103 and the water outlet pipe 105.

[0028] Furthermore, if Figure 2 and Figure 5As shown, the inner wall of the spray gun body 1 and the surface of the filter 108 are both provided with a convenient replacement mechanism 3, the interior of the convenient replacement mechanism 3 includes a positioning clamp 301, a fixing block 302 and a convenient replacement group 303, the convenient replacement group 303 is arranged on the inner wall of the spray gun body 1 and the surface of the filter 108, the convenient replacement group 303 is composed of a spring body 3031, an arc-shaped clamp 3032 and a fixing groove 3033, the inner wall of the spray gun body 1 is provided with a fixing groove 3033, the filter 108 and the fixing groove 303 3 are slidably matched with each other, the inner walls of the spray gun body 1 are all installed with fixed blocks 302, the surfaces of the fixed blocks 302 are all provided with arc-shaped clamps 3032, the arc-shaped clamps 3032 and the surface of the filter 108 are mutually engaged, the surfaces of the fixed blocks 302 are all installed with spring bodies 3031, one end of the spring body 3031 is fixed to the surface of the arc-shaped clamps 3032, the surface of the filter 108 is installed with positioning clamps 301, and the positioning clamps 301 and the inner wall of the spray gun body 1 are mutually engaged.

[0029] During implementation, the user pulls the filter 108 upwards so that the filter 108 slides inside the fixed groove 3033. At this time, the arc-shaped clamp 3032 is driven to move under the elastic force of the spring body 3031 on the surface of the fixed block 302, so that the arc-shaped clamp 3032 moves to the side away from the filter 108, so that the arc-shaped clamp 3032 is away from the surface of the filter 108. At this time, when the filter 108 moves inside the spray gun body 1, the filter 108 drives the positioning clamp 301 away from the inner wall of the spray gun body 1, thereby pulling the filter 108 out of the interior of the spray gun body 1, and replacing the filter 108 to realize the function of replacing the filter 108 of the spray gun.

[0030] Furthermore, if Figure 3 and Figure 6 As shown, a stirring and scraping mechanism 4 is provided inside the stirring box 104, and the interior of the stirring and scraping mechanism 4 includes a moving rod 401, a scraper body 402, a fixed cylinder 403 and a stretching spring 404. The surface of the stirring roller 110 is installed with fixed cylinders 403 at equal intervals, and the interior of the fixed cylinder 403 is provided with a moving rod 401. The moving rod 401 and the inner wall of the fixed cylinder 403 slide with each other. The interior of the stirring box 104 is provided with a scraper body 402 for scraping off the cleaning liquid sticking to the inner wall of the stirring box 104. The scraper body 402 contacts the inner wall of the stirring box 104, and the surface of the moving rod 401 is fixed to the surface of the scraper body 402. The interior of the fixed cylinder 403 is installed with a stretching spring 404, and one end of the stretching spring 404 is fixed to the surface of the moving rod 401.

[0031] During implementation, when the stirring roller 110 rotates inside the stirring box 104, at this time, the moving rod 401 is driven to move under the elastic force of the extension spring 404 inside the fixed cylinder 403, so that the moving rod 401 slides on the inner wall of the fixed cylinder 403, and when the moving rod 401 moves, the moving rod 401 drives the scraper body 402 to move to contact the inner wall of the stirring box 104, and under the joint action of the moving rod 401 and the scraper body 402, the cleaning liquid sticking to the inner wall of the stirring box 104 is scraped off, thereby mixing the cleaning liquid and water inside the stirring box 104 to realize the function of mixing and stirring the cleaning liquid by the spray gun.

[0032] Working principle: When in use, first place the spray gun body 1 at the designated position, the user places the water spray head 103 on the surface of the water outlet pipe 105, and the user pushes the water spray head 103 to make the water spray head 103 slide inside the mounting groove 201. Under the action of the mounting groove 201, the water spray head 103 is guided so that the water spray head 103 drives the anti-dropping clamp 202 to be stuck to the inner wall of the water outlet pipe 105. Under the action of the anti-dropping clamp 202, the water spray head 103 is prevented from dropping off. At this time, the sealing gasket 2034 is driven by the joint action of the sealing airbag 2031 and the sealing spring 2032 inside the sealing frame 2033. Movement causes the sealing gasket 2034 to move to contact the surface of the water outlet pipe 105, and under the joint action of the sealing frame 2033 and the sealing gasket 2034, the water spray head 103 and the water outlet pipe 105 are sealed to prevent water leakage, thereby preventing the cleaning water from seeping out from between the water spray head 103 and the water outlet pipe 105, so as to realize the function of the spray gun to seal and prevent water leakage between the water spray head 103 and the water outlet pipe 105, thereby making the sealing effect between the water spray head 103 and the water outlet pipe 105 better when the spray gun is in use, thereby preventing the cleaning water from seeping out from between the water spray head 103 and the water outlet pipe 105 during the use of the spray gun.

[0033] Then, the user inserts his hand into the handle body 101, and starts the spray gun body 1 by pressing the switch knob 102. When water enters the spray gun body 1, the water is filtered by the filter 108, and purified by the purification mesh plate 107. Then, the water enters the water outlet pipe 105 and the spray head 103, and is sprayed through the through-hole body 106.

[0034] Subsequently, when the filter 108 needs to be replaced after being used for a long time, the user pulls the filter 108 upwards so that the filter 108 slides inside the fixing groove 3033. At this time, the arc-shaped clamp 3032 is driven to move under the elastic force of the spring body 3031 on the surface of the fixing block 302, so that the arc-shaped clamp 3032 moves to the side away from the filter 108, so that the arc-shaped clamp 3032 is away from the surface of the filter 108. At this time, when the filter 108 moves inside the spray gun body 1, the filter 108 drives the positioning clamp 301 away from the inner wall of the spray gun body 1, thereby pulling the filter 108 out of the inside of the spray gun body 1, and replacing the filter 108 to realize the function of conveniently replacing the filter 108 of the spray gun, so that the user can disassemble and replace the filter 108 when using the spray gun, which can achieve the effect of purifying and filtering water and avoid the phenomenon of blocking on the surface of the filter 108 during the use of the spray gun.

[0035] Subsequently, the user introduces the cleaning liquid into the mixing box 104 through the feed barrel, and the user operates the switch knob 102, so that the switch knob 102 controls the drive motor 109 to work, and the drive motor 109 drives the stirring roller 110 to rotate inside the mixing box 104, and the cleaning liquid and water inside the mixing box 104 are mixed under the action of the stirring roller 110. When the stirring roller 110 rotates inside the mixing box 104, at this time, the moving rod 401 is driven to move under the elastic force of the extension spring 404 inside the fixed barrel 403, so that the moving rod 401 is moved in the fixed barrel 403. The inner wall of the mixing box 104 slides, and when the moving rod 401 moves, the moving rod 401 drives the scraper body 402 to move to contact the inner wall of the mixing box 104. Under the joint action of the moving rod 401 and the scraper body 402, the cleaning liquid sticking to the inner wall of the mixing box 104 is scraped off, thereby mixing the cleaning liquid and water inside the mixing box 104 to achieve the function of the spray gun to mix and stir the cleaning liquid, so that the spray gun can introduce cleaning liquid into the mixing box 104 and the spray gun body 1 as needed when in use, so that the spray gun has a better cleaning effect when cleaning the car, and finally completes the use of the spray gun.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention.

Claims

1. A spray gun for self-service car washing, comprising a spray gun body (1), characterized in that: A handle body (101) is installed on the surface at the bottom position of the spray gun body (1), a switch knob (102) is arranged inside the handle body (101), and the switch knob (102) and the inner wall of the handle body (101) are rotatably matched with each other, a water outlet pipe (105) is installed on the surface of the spray gun body (1), and a water spray head (103) is arranged on the surface of the water outlet pipe (105), and a filter screen (108) is arranged inside the spray gun body (1), a stirring box (104) is installed on the surface of the spray gun body (1), and the stirring box (104) is connected with the inside of the spray gun body (1), and a stirring roller (110) is arranged inside the stirring box (104), and the stirring roller (110) and the inner wall of the stirring box (104) are rotatably matched with each other, and the stirring roller The surface of the spray gun body (110) is fixed to the surface of the rotating shaft, the surfaces of the water spray head (103) and the water outlet pipe (105) are both provided with a sealing and leak-proof mechanism (2), the interior of which includes a mounting groove (201), an anti-dropping clamp (202) and a sealing and leak-proof portion (203), the inner wall of the spray gun body (1) and the surface of the filter screen (108) are both provided with a convenient replacement mechanism (3), the interior of which includes a positioning clamp (301), a fixing block (302) and a convenient replacement group (303), the interior of the mixing box (104) is provided with a mixing and scraping mechanism (4), the interior of which includes a moving rod (401), a scraper body (402), a fixing cylinder (403) and a stretching spring (404).

2. A spray gun for self-service car washing according to claim 1, characterized in that: One end of the water outlet pipe (105) extends to the interior of the water spray head (103), and the inner wall of the water spray head (103) is provided with a through hole body (106) at equal intervals, and the through hole body (106) is connected to the interior of the water spray head (103). The inner wall of the spray gun body (1) is installed with a purification mesh plate (107), and the surface of the mixing box (104) is installed with a driving motor (109), and the input end of the driving motor (109) is electrically connected to the output end of the switch knob (102). The output end of the driving motor (109) is installed with a rotating shaft through a coupling, and one end of the rotating shaft passes through the mixing box (104) and extends to the interior of the mixing box (104). A feeding barrel is installed on the surface of the mixing box (104), and the feeding barrel is connected to the interior of the mixing box (104).

3. The spray gun for self-service car washing according to claim 1, characterized in that: The sealing and leak-proof part (203) is arranged on the surface of the water spray head (103) and the water outlet pipe (105); the sealing and leak-proof part (203) is composed of a sealing airbag (2031), a sealing spring (2032), a sealing frame (2033) and a sealing gasket (2034); the surface of the water outlet pipe (105) is provided with a mounting groove (201); the mounting groove (201) and the inner wall of the water spray head (103) are slidably matched with each other; the inner wall of the water spray head (103) is provided with an anti-loosening clamp (202) for preventing the water spray head (103) from loosening; the anti-loosening clamp (202) and the inner wall of the water outlet pipe (105) are mutually engaged; and the inner wall of the water spray head (103) is provided with a sealing frame (2033).

4. A spray gun for self-service car washing according to claim 3, characterized in that: A sealing gasket (2034) is arranged inside the sealing frame (2033), and the sealing gasket (2034) and the inner wall of the sealing frame (2033) are slidably matched with each other, and the surface of the sealing gasket (2034) is in contact with the surface of the water outlet pipe (105). The inner wall of the sealing frame (2033) is installed with a sealing spring (2032), and one end of the sealing spring (2032) is fixed to the surface of the sealing gasket (2034). The inner wall of the sealing frame (2033) is installed with a sealing airbag (2031), and the surface of the sealing airbag (2031) is fixed to the surface of the sealing gasket (2034).

5. The spray gun for self-service car washing according to claim 1, characterized in that: The convenient replacement group (303) is arranged on the inner wall of the spray gun body (1) and the surface of the filter screen (108). The convenient replacement group (303) is composed of a spring body (3031), an arc-shaped clamp (3032) and a fixing groove (3033). The inner wall of the spray gun body (1) is provided with a fixing groove (3033). The filter screen (108) and the inner wall of the fixing groove (3033) are slidably matched with each other. The inner wall of the spray gun body (1) is installed with a fixing block (302).

6. A spray gun for self-service car washing according to claim 5, characterized in that: The surfaces of the fixing blocks (302) are provided with arc-shaped clamps (3032), and the arc-shaped clamps (3032) and the surfaces of the filter screen (108) are mutually engaged and matched. The surfaces of the fixing blocks (302) are provided with spring bodies (3031), and one end of the spring bodies (3031) is fixed to the surfaces of the arc-shaped clamps (3032). The surfaces of the filter screen (108) are provided with positioning clamps (301), and the positioning clamps (301) and the inner wall of the spray gun body (1) are mutually engaged and matched.

7. The spray gun for self-service car washing according to claim 1, characterized in that: The surfaces of the stirring rollers (110) are all installed with fixed cylinders (403) at equal intervals, the interior of the fixed cylinders (403) is provided with moving rods (401), the moving rods (401) and the inner wall of the fixed cylinders (403) are slidably matched with each other, and the interior of the stirring box (104) is provided with a scraper body (402) for scraping off the cleaning liquid sticking to the inner wall of the stirring box (104).

8. The spray gun for self-service car washing according to claim 7, characterized in that: The scraper body (402) is in contact with the inner wall of the mixing box (104), the surface of the moving rod (401) is fixed to the surface of the scraper body (402), and a stretch spring (404) is installed inside the fixed cylinder (403), and one end of the stretch spring (404) is fixed to the surface of the moving rod (401).

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