A self-priming foam gun for vehicle cleaning

Abstract

The present invention discloses a self-priming foam gun for vehicle washing, comprising: a switch mechanism, the switch mechanism is composed of a handle, a hand-held switch and a joint, one end of the joint is connected with a guide tube, and a self-priming channel is arranged inside the guide tube; a gear adjustment mechanism, the gear adjustment mechanism is arranged at the bottom of the guide tube, and the gear adjustment mechanism is communicated with the inside of the self-priming channel; a quick release mechanism, the bottom of the quick release mechanism is connected with a foam liquid bottle, and the foam liquid bottle is detachably connected to the gear adjustment mechanism through the quick release mechanism. The present invention has the advantages of using a Venturi structure and the principle that the faster the flow rate, the lower the pressure, to achieve mixing of water and foam liquid without additional power. Through the gear adjustment component, the foam gun can be used in different fire scenes, thereby improving the practicality of the foam gun. At the same time, through the quick release mechanism, rapid replenishment of foam liquid can be achieved, and through the check valve, water can be prevented from accidentally entering the foam liquid bottle, thereby reducing the accuracy of the mixing ratio.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle cleaning, and in particular relates to a self-priming foam gun for vehicle cleaning. Background Art

[0002] Car washing foam gun is a kind of equipment used for car washing. It mainly sprays out the cleaning liquid and water after mixing. According to the foaming multiple, car washing foam gun can be divided into low-multiple car washing foam gun (less than 20 times), medium-multiple car washing foam gun (20 times-200 times) and high-multiple car washing foam gun (more than 200 times). As the foaming multiple increases, its cleaning effect will be different, but its range will also change accordingly. Car washing foam gun generally mixes water and cleaning liquid in a certain proportion. For example, 3% cleaning liquid + 97% water, or 6% cleaning liquid + 93% water. Which mixing ratio to choose depends on the degree of dirtiness of the car and the use environment of the foam gun. Cleaning liquids with different mixing ratios have different cleaning effects. For example: cleaning liquid with a mixing ratio of 0.7%-1.0% is mainly used to remove minor stains, and cleaning liquid with a mixing ratio of 0.1%-0.3% is mainly used for daily cleaning. Therefore, in actual operation, it is necessary to select a suitable mixing ratio according to the dirtiness of the car, so as to achieve better cleaning effect and more effective use of the cleaning fluid.

[0003] The prior art discloses a foam gun for car washing, and its publication number is: CN218367728U. The disadvantages are: the foam gun cannot adjust the mixing ratio, and a small part of the mixing ratio can be adjusted, but due to the structural defects, the gears are relatively few, and the application scenarios of car washing are relatively narrow. At the same time, the cleaning liquid bottles of the existing foam guns are all installed by threaded rotation. In order to install the cleaning liquid bottle more tightly, the number of thread turns is generally relatively large, which results in the cleaning liquid bottle cannot be quickly disassembled and assembled. When a bottle of cleaning liquid is used up, it is time-consuming and laborious to replace it, which affects the cleaning efficiency. In addition, the existing liquid inlet has no non-return mechanism. When the foam gun is opened and closed, the water flow pressure is relatively small, and the water flow is easy to flow back into the cleaning bottle, so that the cleaning liquid is diluted and the mixing ratio is affected. There are certain limitations. Therefore, we propose a self-priming foam gun for vehicle washing. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a self-priming foam gun for vehicle washing, which, through a Venturi structure and utilizing the principle that the faster the flow rate, the lower the pressure, can achieve mixing of water and foam liquid without additional power; secondly, through a gear adjustment component, the mixing ratio of foam liquid and water used by the foam gun can be conveniently adjusted, so that the foam gun can be used in different fire scenes, thereby improving the practicality of the foam gun; at the same time, through a quick-release mechanism, rapid replenishment of foam liquid can be achieved, and through a check valve, water can be prevented from accidentally entering the foam liquid bottle and reducing the accuracy of the mixing ratio.

[0005] The present invention is achieved in that a self-priming foam gun for vehicle washing comprises:

[0006] The switch mechanism is composed of a handle, a handheld switch and a joint, one end of the joint is connected with a guide tube, and a self-priming channel is arranged inside the guide tube, a ball valve is arranged inside the joint, and the ball valve is transmission-connected with the handheld switch, the handle is arranged at the bottom of the joint, one end of the guide tube is connected with a gun head, and a guide plate is arranged at the connection between the guide tube and the gun head;

[0007] A gear adjustment mechanism, wherein the gear adjustment mechanism is arranged at the bottom of the guide tube, and the gear adjustment mechanism is communicated with the interior of the self-priming channel;

[0008] A quick release mechanism, wherein the bottom of the quick release mechanism is connected to a foam liquid bottle, and the foam liquid bottle is detachably connected to the gear adjustment mechanism through the quick release mechanism.

[0009] Optionally, the self-priming channel is connected to a Venturi structure, the Venturi structure is attached to the inner wall of the guide tube, and one end of the Venturi structure is gradually reduced from the end close to the ball valve to the middle, and the Venturi structure is gradually expanded from the middle to the other end. The gear adjustment mechanism is connected to the interior of the Venturi structure, and the Venturi structure extends into the self-priming channel.

[0010] Optionally, the gear adjustment mechanism includes an adjustment seat body and a orifice plate, connecting holes are provided at both ends of the adjustment seat body, and the adjustment seat body is fixedly installed at the bottom of the guide tube, and one group of connecting holes is interconnected with the internal channel of the venturi structure, and the bottom of the adjustment seat body is connected to a connecting pipe through another group of connecting holes, and the foam liquid bottle is detachably connected to the connecting pipe through a quick release mechanism, an adjustment cavity is provided inside the adjustment seat body, and the adjustment cavity is interconnected with the two groups of connecting holes, and the orifice plate is rotatably installed inside the adjustment cavity.

[0011] Optionally, a connecting rod is integrally welded to the middle part of one side of the orifice plate, one end of the connecting rod passes through one side of the adjustment cavity to the outside of the adjustment seat body, a sealing hole is opened on one side of the adjustment seat body, one end of the connecting rod is detachably connected to an adjusting handwheel by bolts, and the adjusting handwheel is rotatably connected to the adjustment seat body.

[0012] Optionally, a plurality of groups of gear ball grooves are provided around one side of the adjusting hand wheel close to the adjusting seat body, and the plurality of groups of gear ball grooves are arranged equidistantly in a ring shape. A groove is provided at the upper end of one side of the adjusting seat body, and a pressure ball is elastically connected inside the groove, and the pressure ball and the gear ball groove are arranged correspondingly.

[0013] Optionally, a connecting groove is provided on the other side of the adjustment seat body, and the other end of the connecting rod passes through the adjustment cavity to the connecting groove, a limiting hole is provided between the connecting groove and the adjustment cavity, and a sealing sleeve is provided on the fixed sleeve at one end of the outer side of the connecting rod close to the connecting groove, and the other end of the connecting rod is detachably connected to a limiting ring by bolts, the limiting ring and the connecting groove are arranged correspondingly, and the connecting rod is fixed to the adjustment seat body through the limiting ring.

[0014] Optionally, a plurality of groups of flow limiting holes are opened around one side of the orifice plate, and the plurality of groups of flow limiting holes are arranged equidistantly in a ring shape, the flow limiting holes are arranged corresponding to the gear ball grooves, and the radius of the plurality of groups of flow limiting holes is arranged to increase successively when rotating counterclockwise with the connecting rod as the center, and the outer side of the orifice plate is sealed and fitted with the inner wall of the regulating chamber.

[0015] Optionally, the quick-release mechanism includes a connecting cover, a shell body and a docking shell, the docking shell and the connecting cover are communicated with each other internally, a straw is connected to the lower end of the docking shell, the foam liquid bottle is fixedly connected to the connecting cover, the lower end of the straw extends to the lower end of the foam liquid bottle, the connecting cover and the docking shell are elastically connected, a check hole is opened at the upper end of the docking shell, the inside of the check hole is wide at the top and narrow at the bottom, a check valve is arranged above the inside of the check hole, and the check valve is close to the lower part of the inside of the check hole.

[0016] Optionally, the outer side of the docking shell is narrow at the top and wide at the bottom, a reset spring is fixedly installed at the lower end of the outer side of the docking shell, a reset groove is opened at the bottom of the shell, the upper end of the reset spring is fixedly connected to the inside of the reset groove, and the shell is slidably sleeved on the outer side of the docking shell through the reset groove.

[0017] Optionally, a stop groove is opened around the lower end of the outer side of the connecting tube, a plurality of groups of docking grooves are opened around the upper end of the inner side of the non-return hole, and stop beads are movably arranged inside the plurality of groups of docking grooves, an expansion groove is opened around the upper end of the outer side of the docking shell, and another group of identical expansion grooves is opened on the upper surface of the shell, and a retaining ring is arranged inside one group of the expansion grooves.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Through the Venturi structure, the faster the flow rate, the lower the pressure. By reducing the flow channel area in the middle part, negative pressure is generated below, thereby achieving self-priming of the foam liquid. The water and foam liquid can be mixed without additional power, thereby reducing the cost of using the foam gun to extinguish fires to a certain extent;

[0020] 2. Through the gear adjustment mechanism and the Venturi structure, the mixing ratio can be adjusted to 8 levels, including 0%, 0.5%, 1%, 2%, 3%, 4%, 5% and 6%, so that it can be used in different fire scenes, thus further improving the practicality of the foam gun;

[0021] 3. The quick-release mechanism makes the structural design simpler and the foam liquid bottle can be easily installed, which can realize the rapid replenishment of foam liquid, improve the fire extinguishing efficiency at the fire scene, and greatly reduce the loss of personnel and property;

[0022] 4. By setting the ball valve and check valve, the structure is simple to manufacture and install, which can prevent water from accidentally entering the foam liquid bottle, achieve accurate mixing ratio, and further improve the fire extinguishing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 The present invention provides an overall structural diagram.

[0025] Figure 2 The present invention is a schematic diagram of a foam liquid bottle.

[0026] Figure 3 This is a schematic diagram of the connection cover provided by the present invention.

[0027] Figure 4 The present invention provides Figure 3 An enlarged schematic diagram of point A.

[0028] Figure 5 This is a schematic diagram of the gear adjustment mechanism provided by the present invention.

[0029] Figure 6 This is a schematic diagram of the connecting pipe provided by the present invention.

[0030] Figure 7 Schematic diagram of the orifice plate provided by the present invention.

[0031] Figure 8 This is a schematic diagram of the self-priming channel provided by the present invention.

[0032] Fig. 9 A schematic diagram of a gun tip provided by the present invention.

[0033] In the figure: 1 switch mechanism; 2 guide tube; 3 gun head; 4 gear adjustment mechanism; 5 quick release mechanism; 6 foam liquid bottle; 7 retaining ring; 8 expansion groove; 9 docking groove; 10 stop groove; 11 gear ball groove; 12 self-priming channel; 13 suction pipe; 14 guide plate; 15 ball valve; 16 sealing sleeve; 17 Venturi structure; 101 handle; 102 hand switch; 103 joint; 401 adjustment seat body; 402 connecting pipe; 403 adjusting hand wheel; 404 limiting ring; 405 connecting rod; 406 orifice plate; 407 flow limiting hole; 408 pressure ball; 501 connecting cover; 502 shell; 503 return spring; 504 check valve; 505 docking shell; 506 stop bead. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] like Figures 1 to 9 As shown, a self-priming foam gun for vehicle washing provided by an embodiment of the present invention comprises: a switch mechanism 1, the switch mechanism 1 is composed of a handle 101, a handheld switch 102 and a joint 103, one end of the joint 103 is connected with a guide tube 2, and a self-priming channel 12 is arranged inside the guide tube 2, a ball valve 15 is arranged inside the joint 103, and the ball valve 15 is transmission-connected to the handheld switch 102, the handle 101 is arranged at the bottom of the joint 103, one end of the guide tube 2 is connected with a gun head 3, and a guide plate 14 is arranged at the connection between the guide tube 2 and the gun head 3; the self-priming channel 12 is formed by a Venturi structure 17, and the Venturi structure 17 is fitted to the inner wall of the guide tube 2, and one end of the inside of the Venturi structure 17 is gradually reduced from the end close to the ball valve 15 to the middle, and the inside of the Venturi structure 17 is gradually expanded from the middle to the other end. The gear adjustment mechanism 4 is connected to the inside of the Venturi structure 17, and the Venturi structure 17 extends into the self-priming channel; the gear adjustment mechanism 4 is arranged at the bottom of the guide tube 2, and the gear adjustment mechanism 4 is communicated with the inside of the self-priming channel 12; the quick release mechanism 5, the bottom of the quick release mechanism 5 is connected with a foam liquid bottle 6, and the foam liquid bottle 6 is detachably connected to the gear adjustment mechanism 4 through the quick release mechanism 5.

[0036] like Figures 1 to 9As shown, since the self-priming channel 12 is formed by a Venturi structure 17, the Venturi structure 17 is designed according to the Bernoulli principle. The faster the flow rate, the smaller the pressure. By reducing the flow channel area in the middle part, negative pressure is generated below to achieve self-priming of the foam liquid, thereby achieving automatic rising of the foam inside the foam liquid bottle 6. Therefore, the foam gun of the present invention can achieve mixing of water and foam liquid without additional power, thereby saving the cost of using traditional foam guns to a certain extent. A part of the Venturi tube is extended into the self-priming channel to reduce pressure loss. At the same time, the flow rate of the self-priming channel is accelerated at the mixing point, so that water and foam liquid are mixed more fully, and a better fire extinguishing effect can be achieved.

[0037] like Figures 1 to 9 As shown, through the design of the gear adjustment mechanism 4, the gear adjustment mechanism 4 can adjust the flow rate of the foam delivered to the inside of the guide pipe 2, and can achieve 8 levels of mixing ratio adjustment of 0%, 0.5%, 1%, 2%, 3%, 4%, 5% and 6%, so that the foam gun is suitable for different fire scenes, thereby further improving the fire extinguishing effect of the foam gun.

[0038] like Figures 1 to 9 As shown, through the design of the quick-release mechanism 5, the installation speed of the foam liquid bottle 6 is greatly improved, so that the traditional rotation installation and removal using threads is not required, so the rapid replenishment of the foam liquid can be achieved.

[0039] Furthermore, the gear adjustment mechanism 4 includes an adjustment seat body 401 and an orifice plate 406. Both ends of the adjustment seat body 401 are provided with connecting holes, and the adjustment seat body 401 is fixedly installed at the bottom of the guide tube 2, and one group of connecting holes is interconnected with the internal channel of the venturi structure 17. The bottom of the adjustment seat body 401 is connected with a connecting pipe 402 through another group of connecting holes. The foam liquid bottle 6 is detachably connected to the connecting pipe 402 through a quick release mechanism 5. An adjustment cavity is provided inside the adjustment seat body 401, and the adjustment cavity is interconnected with the two groups of connecting holes. The orifice plate 406 is rotatably installed inside the adjustment cavity; a connecting rod 405 is integrally welded in the middle of one side of the orifice plate 406, and one end of the connecting rod 405 passes through one side of the adjustment cavity to the outside of the adjustment seat body 401. A sealing hole is provided on one side of the adjustment seat body 401. One end of the connecting rod 405 is detachably connected to an adjusting hand wheel 403 by bolts, and the adjusting hand wheel 403 is rotatably connected to the adjusting seat body 401; a plurality of groups of gear ball grooves 11 are provided around one side of the adjusting hand wheel 403 close to the adjusting seat body 401, and the plurality of groups of gear ball grooves 11 are arranged in a circular shape and equidistantly; a groove is provided at the upper end of one side of the adjusting seat body 401, and a pressure ball 408 is elastically connected inside the groove, and the pressure ball 408 is arranged correspondingly to the gear ball groove 11; a plurality of groups of flow limiting holes 407 are provided around one side of the orifice plate 406, and the plurality of groups of flow limiting holes 407 are arranged in a circular shape and equidistantly, and the flow limiting holes 407 are arranged correspondingly to the gear ball groove 11, and the radius of the plurality of groups of flow limiting holes 407 is successively increased by rotating counterclockwise with the connecting rod 405 as the center, and the outer side of the orifice plate 406 is sealed and fitted with the inner wall of the adjusting cavity.

[0040] It is to be noted that the principle of the above-mentioned middle hole plate 406 to achieve different mixing ratios is as follows:

[0041] The control of the mixing ratio is achieved by controlling the flow limiting holes 407 of different areas of the orifice plate 406. The orifice plate 406 and the connecting rod 405 are integrated, and different mixing ratios can be adjusted by rotating the connecting rod 405.

[0042] It should be noted that the multiple groups of flow limiting holes 407 and the gear ball grooves 11 are evenly distributed at 45°, with 8 in number (note that the hole is a sealing surface at gear 0), so that the multiple groups of flow limiting holes 407 gradually increase in radius, and can achieve a total of 8 mixing ratio adjustments of 0%, 0.5%, 1%, 2%, 3%, 4%, 5% and 6%.

[0043] like Figures 1 to 9As shown, the flow limiting hole 407 and the gear ball slot 11 are designed to be correspondingly arranged. After the adjusting hand wheel 403 drives the orifice plate 406 to rotate 45° through the connecting rod 405, the flow limiting hole 407 and the gear ball slot 11 are still at the same level. Therefore, when the flow limiting hole 407 and the gear ball slot 11 are synchronously adjusted, the pressed ball 408 of the adjustment seat body 401 bounces into the groove and makes a "click" sound to remind the user that the gear adjustment is completed, thereby greatly reducing the probability of user operation errors.

[0044] Furthermore, a connecting groove is provided on the other side of the adjusting seat body 401, and the other end of the connecting rod 405 passes through the inside of the adjusting cavity to the inside of the connecting groove, and a limiting hole is provided between the connecting groove and the adjusting cavity. A sealing sleeve 16 is fixedly provided on one end of the outer side of the connecting rod 405 close to the connecting groove, and the other end of the connecting rod 405 is detachably connected to a limiting ring 404 by bolts, and the limiting ring 404 is correspondingly arranged with the connecting groove, and the connecting rod 405 is fixed to the adjusting seat body 401 by the limiting ring 404;

[0045] like Figures 1 to 9 As shown, due to the design that the connecting rod 405 is fixed to the adjustment seat body 401 by the limiting ring 404, the limiting ring 404 will fix the connecting rod 405 by bolting, thereby indirectly fixing the orifice plate 406, thereby effectively preventing the orifice plate 406 from shaking due to the flow rate generated by the foam liquid.

[0046] Further, the quick release mechanism 5 includes a connection cover 501, a shell 502 and a docking shell 505. The docking shell 505 and the connection cover 501 are connected to each other. The lower end of the docking shell 505 is connected to the suction pipe 13. The foam liquid bottle 6 is fixedly connected to the connection cover 501. The lower end of the suction pipe 13 extends to the lower end of the foam liquid bottle 6. The connection cover 501 and the docking shell 505 are elastically connected. A check hole is opened at the upper end of the docking shell 505. The inside of the check hole is wide at the top and narrow at the bottom. A check valve 504 is arranged above the inside of the check hole, and the check valve 504 is close to the lower part of the inside of the check hole.

[0047] like Figures 1 to 9 As shown, by setting the check valve 504, the structure is simple to manufacture and install, and can effectively prevent the water from flowing back into the foam liquid bottle 6 and affecting the accuracy of the mixing ratio.

[0048] Furthermore, the outer side of the docking shell 505 is narrow at the top and wide at the bottom, a reset spring 503 is fixedly installed at the lower end of the outer side of the docking shell 505, a reset groove is provided at the bottom of the shell 502, the upper end of the reset spring 503 is fixedly connected to the inside of the reset groove, and the shell 502 is slidably sleeved on the outer side of the docking shell 505 through the reset groove; a stop groove 10 is provided around the lower end of the outer side of the connecting pipe 402, a plurality of groups of docking grooves 9 are provided around the upper end of the inside of the non-return hole, and stop beads 506 are movably provided inside the plurality of groups of docking grooves 9, an expansion groove 8 is provided around the upper end of the outer side of the docking shell 505, and another group of identical expansion grooves 8 is provided on the upper surface of the shell 502, and a retaining ring 7 is provided inside one group of the expansion grooves 8

[0049] like Figures 1 to 9 As shown, through the design of the reset spring 503, after the shell 502 is manually pressed and slides down by the user, the user releases his hand, and the shell 502 can automatically slide upward and reset under the action of the reset spring 503. First, the reset spring 503 can effectively improve the stability of the shell 502 squeezing the stop bead 506 inside the docking groove 9. Second, the shell 502 can be automatically reset, which can further speed up the installation efficiency of the foam liquid bottle 6.

[0050] like Figures 1 to 9 As shown, a retaining ring 7 is arranged inside one of the groups of expansion grooves 8. The above-mentioned one of the groups of expansion grooves 8 refers to the expansion grooves 8 opened at the upper end of the outer side of the docking shell 505. Therefore, the retaining ring 7 can limit the rising distance of the shell 502, thereby preventing the shell 502 from rising too high and causing dislocation.

[0051] like Figures 1 to 9 As shown, through the design of the stop groove 10, the docking groove 9 and the expansion groove 8, when disassembling and replacing the foam liquid bottle 6, the expansion groove 8 is made to slide down to the position of the stop bead 506 by pressing and sliding the housing 502, and the stop bead 506 can slide outward, so that the stop bead 506 is separated from the inside of the stop groove 10, and the foam liquid bottle 6 and the foam gun can be quickly separated. When installing, press and slide the housing 502 upwards, insert the full foam liquid bottle 6 into the connecting pipe 402 of the foam gun, loosen the housing 502, and the stop bead 506 is squeezed into the stop groove 10 after being stressed, so that the foam liquid bottle 6 and the foam gun can be quickly connected.

[0052] The above embodiments are only used to help understand the method and core idea of ​​the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A self-priming foam gun for vehicle washing, characterized in that: include: The switch mechanism is composed of a handle, a handheld switch and a joint. One end of the joint is connected with a guide tube, and a self-priming channel is arranged inside the guide tube. A ball valve is arranged inside the joint, and the ball valve is transmission-connected with the handheld switch. The handle is arranged at the bottom of the joint. One end of the guide tube is connected with a gun head, and a guide plate is arranged at the connection between the guide tube and the gun head. The gear adjustment mechanism is arranged at the bottom of the guide pipe, and the gear adjustment mechanism is communicated with the inside of the self-priming channel; A quick release mechanism, the bottom of which is connected to a foam liquid bottle, and the foam liquid bottle is detachably connected to the gear adjustment mechanism through the quick release mechanism; The self-priming channel is connected to the Venturi structure, the Venturi structure is attached to the inner wall of the guide tube, and one end of the Venturi structure is gradually reduced from the end close to the ball valve to the middle, and the middle of the Venturi structure is gradually expanded to the other end. The gear adjustment mechanism is connected to the inside of the Venturi structure, and the Venturi structure is extended into the self-priming channel; The gear adjustment mechanism includes an adjustment seat body and an orifice plate. Both ends of the adjustment seat body are provided with connection holes, and the adjustment seat body is fixedly installed at the bottom of the guide pipe, and one group of the connection holes is interconnected with the internal channel of the venturi structure, and the bottom of the adjustment seat body is connected with a connection pipe through another group of connection holes, and the foam liquid bottle is detachably connected to the connection pipe through a quick release mechanism, and an adjustment cavity is provided inside the adjustment seat body, and the adjustment cavity is interconnected with the two groups of connection holes, and the orifice plate is rotatably installed inside the adjustment cavity; A connecting rod is integrally welded in the middle of one side of the orifice plate, one end of the connecting rod passes through one side of the inner part of the adjustment cavity to the outer side of the adjustment seat body, a sealing hole is opened on one side of the adjustment seat body, one end of the connecting rod is detachably connected to an adjusting hand wheel through a bolt, and the adjusting hand wheel is rotatably connected to the adjustment seat body; A plurality of gear ball grooves are provided around one side of the adjusting hand wheel close to the adjusting seat body, and the plurality of gear ball grooves are arranged in a circular shape and at equal intervals. A groove is provided at the upper end of one side of the adjusting seat body, and a pressure ball is elastically connected inside the groove, and the pressure ball and the gear ball groove are arranged correspondingly. A connecting groove is provided on the other side of the adjusting seat body, and the other end of the connecting rod passes through the adjusting cavity to the connecting groove, a limiting hole is provided between the connecting groove and the adjusting cavity, a sealing sleeve is provided on the fixed sleeve at one end of the outer side of the connecting rod close to the connecting groove, and the other end of the connecting rod is detachably connected to a limiting ring by a bolt, the limiting ring is correspondingly arranged to the connecting groove, and the connecting rod is fixed to the adjusting seat body by the limiting ring; A plurality of flow limiting holes are provided around one side of the orifice plate, and the plurality of flow limiting holes are arranged equidistantly in a ring shape, the flow limiting holes are arranged correspondingly to the gear ball grooves, and the radii of the plurality of flow limiting holes are arranged to increase in sequence as they rotate counterclockwise with the connecting rod as the center, and the outer side of the orifice plate is sealed and fitted with the inner wall of the regulating chamber.

2. A self-priming foam gun for vehicle washing according to claim 1, characterized in that: The quick-release mechanism includes a connecting cover, a shell and a docking shell. The docking shell and the connecting cover are connected to each other. A straw is connected to the lower end of the docking shell. The foam liquid bottle is fixedly connected to the connecting cover. The lower end of the straw extends to the lower end of the foam liquid bottle. The connecting cover and the docking shell are elastically connected. A check hole is opened at the upper end of the docking shell. The inside of the check hole is wide at the top and narrow at the bottom. A check valve is arranged above the inside of the check hole, and the check valve is close to the lower part of the inside of the check hole.

3. A self-priming foam gun for vehicle washing according to claim 2, characterized in that: The outer side of the docking shell is narrow at the top and wide at the bottom. A reset spring is fixedly installed at the lower end of the outer side of the docking shell. A reset groove is opened at the bottom of the shell. The upper end of the reset spring is fixedly connected to the inside of the reset groove. The shell is slidably sleeved on the outer side of the docking shell through the reset groove.

4. A self-priming foam gun for vehicle washing according to claim 3, characterized in that: A stop groove is provided around the lower end of the outer side of the connecting pipe, a plurality of docking grooves are provided around the upper end of the inner side of the non-return hole, and stop beads are movably arranged inside the plurality of docking grooves, an expansion groove is provided around the upper end of the outer side of the docking shell, and another plurality of identical expansion grooves are provided on the upper surface of the shell, and a retaining ring is arranged inside one of the expansion grooves.

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