A foam cleaning lance

Abstract

The utility model provides a kind of foam cleaning gun, including gun head, gun body, valve and trigger, gun head is set in the front end of gun body, trigger is hinged with gun body, valve is set in gun body, mixing mouth is set in the front end of gun body, push rod, air passage and liquid passage are set in gun body, mixing mouth outlet is communicated with gun head, push rod is set between mixing mouth import and valve, trigger is connected with push rod, push rod reciprocates in gun body to open or close mixing mouth import and valve.The setting of the push rod front connection mixing mouth, valve is connected in back, one push rod opens gas-liquid two channels simultaneously, and gas-liquid mixing and closing gas-liquid are opened synchronously, and use effect is better.

Description

Technical Field

[0001] This utility model relates to a cleaning tool technology, specifically a foam cleaning gun. Background Technology

[0002] To effectively clean oil stains or heavily soiled surfaces of vehicles or workpieces, the traditional method involves mixing water and cleaning fluid and spraying the high-pressure detergent to clean the surface. This method results in significant waste of cleaning fluid and water resources, poor cleaning effectiveness, and potential environmental pollution. To address this, foam cleaning guns that combine high-pressure air and cleaning fluid have been developed. When compressed air is used alone, it sprays gas from the nozzle to remove particulate dust and dirt from the car or workpiece surface. When compressed air and cleaning fluid are used simultaneously, the compressed air draws in the cleaning fluid through negative pressure and sprays it at high pressure onto the soiled areas for cleaning. However, these foam cleaning guns have the following shortcomings: First, the most effective way to clean oil stains or heavily soiled surfaces is to generate foam from the cleaning fluid to dissolve the oil stains or dirt. However, existing foam cleaning guns have low outlet pressure, short range, uneven foam production, and poor effectiveness. The cleaning fluid is not used to its full potential, resulting in significant waste and unsatisfactory cleaning results. Secondly, with the rapid development of the automobile industry, car washing is gradually becoming more automated and intelligent. However, since the cleaning gun is equipped with a container for cleaning fluid, the container must be held while operating, which is inconvenient. At the same time, the working time is limited by the capacity of the cleaning fluid, and it cannot be used in conjunction with automated production lines. Therefore, many manufacturers and insightful individuals have been developing and researching this technology, but so far no ideal product has been launched. Utility Model Content

[0003] To overcome the aforementioned defects of existing foam cleaning guns, the purpose of this utility model is to provide a handheld foam cleaning gun with a simple and reasonable structure, convenient processing and assembly, high outlet pressure, long range, uniform foam, good cleaning effect, and long continuous working time.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A foam cleaning gun includes a gun head, a gun body, a valve, and a trigger. The gun head is located at the front end of the gun body, the trigger is hinged to the gun body, and the valve is located inside the gun body. A mixing nozzle is located inside the front end of the gun body. A push rod, an air passage, and a liquid passage are located inside the gun body. The outlet of the mixing nozzle communicates with the gun head. The push rod is positioned between the inlet of the mixing nozzle and the valve. The trigger is connected to the push rod. The push rod reciprocates within the gun body to open or close the inlet of the mixing nozzle and the valve. The movement of the push rod allows for simultaneous opening and closing of the mixing nozzle and the valve, thus enabling the air-liquid passages to open and close simultaneously, resulting in a more compact structure.

[0006] The mixing nozzle consists of a liquid inlet section, an air inlet section, and a mixing section connected in sequence. These sections are internally interconnected. At least one air inlet hole is located on the side of the air inlet section. The mixing section is connected to the nozzle head. When the mixing nozzle is closed, the liquid inlet section is sealed to the front end of the push rod. When the mixing nozzle is open, liquid enters the mixing nozzle from the liquid inlet section, and air enters the mixing section from the side air inlet hole of the air inlet section. After mixing, the mixture enters the nozzle body for foaming.

[0007] The mixing nozzle inlet section is provided with threads that connect to the gun body.

[0008] The outer surface of the mixing section has an O-ring groove.

[0009] The front end of the push rod is equipped with a plug that is sealed to the inlet end of the mixing nozzle, and the rear end of the push rod is fixedly connected to the valve core of the valve.

[0010] The valve includes a valve body, guide sleeve, valve stem, valve core, valve core seat, and return spring. The guide sleeve, valve stem, valve core, and return spring are housed within the valve body. The valve stem is fixed to the valve core and reciprocates within the guide sleeve. A push rod is fitted inside the valve stem, and the valve core seat is fixed to the push rod. The return spring is located between the valve core seat and the bottom of the valve body. The valve body communicates with the vent passage. The trigger is connected to the push rod via the valve stem. Due to the action of the return spring, the valve core is normally closed. When the trigger is pulled, the valve core opens.

[0011] The inlet end of the liquid passage is equipped with a car wash liquid inlet connector, and the inlet end of the air passage is equipped with an air inlet connector.

[0012] An air volume control plug is installed at the outlet end of the air inlet connector. Conventional air pressure has a large air volume. After testing, a small-hole plug was used for the air volume control plug, which is designed inside the gun body. This reduces the air volume, makes it easier to use, eliminates the need for an external pressure regulating device, and reduces costs.

[0013] The inlet of both the fluid passage and the air passage is located at the end of the handle. The handle features two channels, one for air and one for fluid, a clever and compact design. The gun is small and lightweight.

[0014] An adjustment assembly is located at the rear end of the valve. This assembly includes a fixed base, a guide assembly, a screw, and a knob. The fixed base is fixed to the gun body and fitted over the guide assembly. The screw passes through the guide assembly and reciprocates within it. One end of the screw passes through the bottom of the valve housing, and the other end is fixed to the knob. Rotating the knob on the adjustment assembly allows the screw to extend a certain distance into the valve, thus limiting the push rod's stroke and the trigger angle.

[0015] The gun head includes a foam head cover, a support cover, a sponge body, and a foam head base. The foam head base is fixed to the front end of the gun head and has an internal cavity. The foam head cover is fixed to the front end of the foam head base. The support cover and the sponge body are installed inside the foam head cover. The sponge body is located at the front end of the cavity, and the support cover is fixed to the front end of the sponge body.

[0016] An opening is provided at the front end of the foam head base, and the opening is integrated with the foam head base. The outlet is directly opened on the foam head cover, which avoids the foam from being blocked or broken by uneven channels at the connection points of the separate parts.

[0017] The above-described solution of this utility model has at least the following beneficial effects:

[0018] With a push rod connected to a mixing nozzle at the front and a valve at the back, a single push rod can simultaneously open both gas and liquid channels, allowing for synchronized gas-liquid mixing and shut-off, resulting in better performance.

[0019] By using the inlet connector and cleaning fluid tube for direct connection, there is no need to lift the pot, making it more convenient.

[0020] An air volume control plug is installed at the air inlet to control the gas pressure, avoiding poor foaming due to high pressure and no foaming due to low pressure. Thorough mixing before entering the foam chamber ensures better foaming results. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the foam cleaning gun of this utility model.

[0022] Figure 2 This is a schematic diagram of the mixing nozzle.

[0023] Figure 3 This is a cross-sectional structural diagram of the mixing nozzle.

[0024] Figure 4 This is a schematic diagram showing the connection between the push rod, the mixing nozzle, and the valve.

[0025] The components are as follows: 1. Foam head cover, 2. Support cover, 3. Sponge body, 4. Foam head seat, 5. Mixing nozzle, 6. Gun body, 7. Outer shell, 8. Push rod, 9. Trigger, 10. Valve, 11. Adjustment component, 12. Air volume control plug, 13. Air inlet connector, 14. Car wash liquid inlet connector, 15. Vent, 16. Liquid inlet, 17. Opening, 51. Liquid inlet, 52. Liquid inlet section, 53. Air inlet section, 54. Mixing section, 531. Air inlet, 541. O-ring groove, 801. Block, 802. Push rod body, 101. Valve core, 102. Valve stem, 103. Guide sleeve, 104. Valve shell, 105. Return spring, 106. Valve core seat, 107. Space, 111. Fixing seat, 112. Guide component, 113. Screw, 114. Knob, 151. Vent. Detailed Implementation

[0026] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0027] The front and back positions below are determined by the direction of gas and liquid movement in the foam cleaning gun, that is, the opening of the foam cleaning gun is the front.

[0028] like Figure 1 As shown, a foam cleaning gun includes a gun head, a gun body 6, a valve 10, and a trigger 9. The gun head is located at the front end of the gun body 6. The trigger 9 is hinged to the gun body 6. The valve 10 is located inside the gun body 6. A push rod 8 is also located inside the gun body 6. A mixing nozzle 5 is located inside the front end of the gun body 6. The push rod 8 is located between the mixing nozzle 5 and the valve 10 and reciprocates. Under normal conditions, the inlet of the mixing nozzle 5 is sealed to one end of the push rod 8, and the outlet of the mixing nozzle 5 communicates with the gun head. The other end of the push rod 8 is inserted into the valve 10 and connected to the valve core 101 of the valve 10. A vent 15 and a liquid passage 16 are provided inside the gun body. The trigger 9 and the push rod 8 are connected through the valve 10. The gun body 6 is provided with a shell 7.

[0029] An air inlet connector 13 is provided at the inlet end of the air duct 15, and a car wash liquid inlet connector 14 is provided at the inlet end of the liquid duct 16. The inlet end of the air duct 15 and the inlet end of the liquid duct 16 are both located at the end of the gun handle. An air volume control plug 12 is provided at the front end of the air inlet connector 13 to reduce the air pressure. The air inlet connector 13 and the car wash liquid inlet connector 14 are screwed into the gun handle. The air inlet connector 13 can be connected to a compressed gas device via a pipe, and the car wash liquid inlet connector 14 can be connected to a car wash liquid device via a pipe.

[0030] like Figure 2-3 As shown, the mixing nozzle consists of a liquid inlet 51, a liquid inlet section 52, an air inlet section 53, and a mixing section 54 connected in sequence. The liquid inlet 51, liquid inlet section 52, air inlet section 53, and mixing section 54 are internally interconnected. The liquid inlet 51 is located inside the liquid inlet section 52 and is sealed to the front end of the push rod 8. The liquid inlet section 52 has threads on its exterior that are screwed onto the gun body 6. The air inlet section 53 has four air inlets 531 on its side. The mixing section 54 has O-ring grooves 541 on its outer side for installing O-rings.

[0031] like Figure 1 and 4As shown, the push rod 8 includes a plug 801 and a push rod body 802; the valve 10 includes a valve core 101, a valve stem 102, a guide sleeve 103, a valve housing 104, a return spring 105, and a valve core seat 106. The guide sleeve 103, valve stem 102, valve core 101, space 107, and return spring 105 are disposed inside the valve housing 104. The valve stem 102 is fixed to the valve core 101 and reciprocates within the guide sleeve 103. The push rod body 802 is fitted inside the valve stem 102. The valve core seat 106 is fixed on the push rod body 802. The return spring 105 is disposed between the valve core seat 802 and the bottom of the valve housing 104. The valve housing 104 communicates with the vent 15. The trigger 9 is connected to the push rod 8 through the valve stem 102. Specifically, the trigger 9 is engaged on the valve stem 102 to drive the valve stem 102 to move; the valve housing 104 has a vent hole 151 that communicates with the vent 15. When trigger 9 is pulled, valve stem 102 moves backward, causing push rod 8 to also move backward, and valve core 101 to also move backward. This opens the sealed space 107 of valve core 101, allowing compressed air to enter valve housing 104 through vent 151 via vent 151, and then into space 107. Space 107 has an opening that communicates with the gun body vent 6. This gun body vent 6 can be located on the side of the gun body and is connected to the air inlet 531 of mixing nozzle 5. Simultaneously, the blockage 801 of push rod 8 also moves backward, opening the liquid inlet 51 of mixing nozzle 5. This liquid inlet 51 is connected to the liquid passage 16 of the handle via the gun body liquid passage. The car wash liquid enters the mixing section 54 of mixing nozzle 5, mixes with compressed air, and then enters the nozzle head from the outlet of mixing nozzle 5 for foaming. The gun body liquid passage is located on the side of the gun body, opposite to the gun body vent 6.

[0032] An adjustment assembly 11 is provided at the rear end of the valve 10. The adjustment assembly 11 includes a fixed seat 111, a guide assembly 112, a screw 113, and a knob 114. The fixed seat 111 is fixed inside the gun body 6 and fits over the guide assembly 112. The screw 113 passes through the guide assembly 112 and reciprocates within it. One end of the screw 113 passes through the bottom of the valve 10 housing, and the other end is fixed to the knob 114. By rotating the knob of the adjustment assembly 11, the distance the screw extends into the valve can be limited, thereby limiting the stroke of the push rod and thus limiting the angle at which the trigger 9 is opened.

[0033] The nozzle includes a foam head cover 1, a support cover 2, a sponge body 3, and a foam head base 4. The foam head base 4 is fixed to the front end of the nozzle 6 and has an internal cavity that is funnel-shaped. This cavity is designed to buffer and depressurize, allowing for pre-foaming of the gas and liquid. The foam head cover 1 is fixed to the front end of the foam head base 4. The support cover 2 and the sponge body 3 are disposed inside the foam head cover 1. The sponge body 3 is located at the front end of the cavity, and the support cover 1 is fixed to the front end of the sponge body 3. The support cover 2 has evenly distributed openings 21, which allows the foam formed by the sponge body 3 to reach the openings 17 more evenly.

[0034] An opening 17 is provided at the front end of the foam head cover 1, and the opening 17 is integrally formed with the foam head cover 1. The foam head cover 1 has a direct outlet, which avoids the foam being blocked or broken by the channel at the connection point of the split parts.

[0035] This utility model relates to a handheld dual-tube foam cleaning gun. The dual tubes refer to the air passage and liquid passage set inside the handle. It includes an air inlet connector 13 and a car wash liquid inlet connector 14. After the compressed gas reduces the air pressure through the air volume control plug 12, the trigger 9 pushes the push rod 8 and the valve 10 to open simultaneously. The gas enters the mixing nozzle 5 for premixing and then enters the gun head. It is then foamed through the sponge 3 and finally sprayed out through the foam head cover 1 outlet.

[0036] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. A foam cleaning gun, comprising a gun head, a gun body, a valve, and a trigger, wherein the gun head is disposed at the front end of the gun body, the trigger is hinged to the gun body, and the valve is disposed within the gun body, characterized in that... A mixing nozzle is installed inside the front end of the gun body. A push rod, a venting channel, and a liquid channel are installed inside the gun body. The outlet of the mixing nozzle is connected to the gun head. The push rod is located between the inlet of the mixing nozzle and the valve. The trigger is connected to the push rod. The push rod reciprocates inside the gun body to open or close the inlet of the mixing nozzle and the valve.

2. The foam cleaning gun according to claim 1, characterized in that, The mixing nozzle consists of a liquid inlet section, an air inlet section, and a mixing section connected in sequence. The liquid inlet section, air inlet section, and mixing section are interconnected. At least one air inlet hole is provided on the side of the air inlet section. The mixing section is connected to the nozzle head. When the mixing nozzle is closed, the liquid inlet section is sealed to the front end of the push rod.

3. The foam cleaning gun according to claim 2, characterized in that, The outer surface of the mixing section has an O-ring groove.

4. The foam cleaning gun according to claim 1, characterized in that, The inlet end of the liquid passage is equipped with a car wash liquid inlet connector, and the inlet end of the air passage is equipped with an air inlet connector.

5. The foam cleaning gun according to claim 4, characterized in that, An air volume control plug is installed at the outlet end of the air inlet connector.

6. The foam cleaning gun according to claim 1, characterized in that, The inlet end of the fluid passage is located at the end of the handle of the gun body, and the inlet end of the air passage is located at the end of the handle of the gun body.

7. The foam cleaning gun according to claim 1, characterized in that, The valve includes a valve body, a guide sleeve, a valve stem, a valve core, a valve core seat, and a return spring. The guide sleeve, valve stem, valve core, and return spring are disposed inside the valve body. The valve stem is fixed to the valve core and reciprocates within the guide sleeve. A push rod is sleeved inside the valve stem. The valve core seat is fixed on the push rod. The return spring is disposed between the valve core seat and the bottom of the valve body. The valve body communicates with the vent passage. The trigger is connected to the push rod through the valve stem.

8. The foam cleaning gun according to claim 7, characterized in that, An adjustment assembly is provided at the rear end of the valve. The adjustment assembly includes a fixed seat, a guide assembly, a screw, and a knob. The fixed seat is fixed inside the gun body and sleeved on the outside of the guide assembly. The screw passes through the guide assembly and reciprocates inside the guide assembly. One end of the screw passes through the bottom of the valve housing, and the other end is fixed to the knob.

9. The foam cleaning gun according to claim 1, characterized in that, The gun head includes a foam head cover, a support cover, a sponge body, and a foam head base. The foam head base is fixed to the front end of the gun head and has an internal cavity. The foam head cover is fixed to the front end of the foam head base. The support cover and the sponge body are installed inside the foam head cover. The sponge body is located at the front end of the cavity, and the support cover is fixed to the front end of the sponge body.

10. The foam cleaning gun according to claim 8, characterized in that, An opening is provided at the front end of the foam head base, and the opening is integrated with the foam head base.

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