All-plastic spray gun with novel internal structure

Abstract

The invention discloses an all-plastic spray gun with a novel internal structure, and relates to the technical field of spray guns, the all-plastic spray gun comprises a gun body assembly, the gun body assembly comprises a liquid outlet pipe, a piston pipe is integrally formed at the bottom end of the liquid outlet pipe, a liquid inlet channel is integrally formed at one side of the piston pipe, and the top end of the liquid inlet channel and one end of the liquid outlet pipe are integrally formed and communicated; a limiting ring is integrally formed at the bottom end of the piston pipe, and the bottom end of the liquid inlet channel communicates with the limiting ring. Through the arrangement of the gland assembly and the lower valve assembly, a pump body, a sealing plug, a valve and the like of a traditional spray gun are replaced by the gland assembly and the lower valve assembly, the lower valve assembly has certain elasticity, and during use, the gland assembly and the lower valve assembly can achieve the functions of the pump body, the sealing plug and the valve of the traditional spray gun; meanwhile, the gland assembly and the lower valve assembly are simple in structure and convenient to assemble, meanwhile, the gland assembly and the lower valve assembly are made of the same material as the whole spray gun, and recovery is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of spray guns, in particular to a full-plastic spray gun with a novel internal structure. Background Art

[0002] A spray gun is a commonly used liquid spraying tool in daily life. People use it to spray various liquids for disinfection, cleaning, and watering flowers. Currently, the spray guns on the market are mainly composed of a head cap, a shell, a gun body, a trigger, a piston, a spring, a sealing plug or valve, a pump body, and a bottle body. Its working principle is mainly that the trigger pushes the piston and spring, causing the piston to move within the gun body, and the gas in the gun body flows out from the head cap. Releasing the trigger spring resets the piston, the pressure in the gun body decreases, and the pressure in the bottle body remains unchanged. A pressure difference is generated between the gun body and the bottle body. Through this pressure difference, the liquid pushes the sealing plug and is sucked from the bottle body into the gun body. Then, by pulling the trigger, the liquid is sprayed out from the head cap.

[0003] The existing spray gun uses the cooperation of a spring and a piston to change the pressure in the gun body, and uses a sealing plug or a valve to seal between the gun body and the bottle body. The structure is relatively complex and the assembly is relatively troublesome.

[0004] Therefore, it is necessary to invent a new type of full plastic spray gun with an internal structure to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a new type of all-plastic spray gun with an internal structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a novel all-plastic spray gun with an internal structure, comprising a gun body assembly, the gun body assembly including a liquid outlet pipe, the bottom end of the liquid outlet pipe being integrally provided with a piston tube, one side of the piston tube being integrally provided with a liquid inlet channel, and the top end of the liquid inlet channel being integrally formed with and connected to one end of the liquid outlet pipe, the bottom end of the piston tube being integrally provided with a limiting ring, and the bottom end of the liquid inlet channel being connected to the limiting ring, the bottom end of the limiting ring being snap-connected to a gland assembly, and a lower valve assembly being provided inside the gland assembly;

[0007] The gland assembly includes a support plate, a first ring and a second ring are integrally formed around the top edge of the support plate, and the second ring is located inside the first ring; a liquid suction port is opened through the middle of the support plate, an extension tube adapted to the liquid suction port is integrally formed in the middle of the bottom end of the support plate, a sealing column is integrally formed on the inner wall of one side of the liquid suction port, and the top end of the sealing column extends to the inside of the second ring;

[0008] The lower valve assembly includes a sealing member, a reset member is provided at the bottom of the sealing member, and the top of the reset member is integrally formed with the bottom end of the outer wall of the sealing member, a gasket is integrally formed around the bottom end of the reset member, a first liquid storage tank is penetrated through the top of the sealing member, a second liquid storage tank is penetrated through the bottom of the reset member, a limiting member is provided at the inner lower end of the sealing member, and the bottom end of the limiting member extends to the inner upper end of the reset member, the outer wall of the limiting member is integrally formed with a reset position, and the outer side of the reset position is integrally formed with the bottom end of the sealing member, a limiting groove is provided at the bottom end of the limiting member, a sealing groove is penetrated through the top of the limiting groove, and the sealing groove is adapted to the top end of the sealing column, and the first liquid storage tank and the second liquid storage tank are separated by the limiting member and the reset position.

[0009] Preferably, the top of the sealing column is truncated in a cone shape, and the sealing column movably passes through the limit piece. Extension plates are integrally formed on both sides of the bottom end of the outer wall of the support plate, and the extension plates are arc-shaped. Ventilation ports are opened on both sides of the top of the support plate, and the two ventilation ports are respectively located on both sides of the bottom of the second ring.

[0010] Preferably, the bottom end of the gasket is fitted and connected to the top end of the support plate, and the reset portion is arranged in an arc shape.

[0011] Preferably, a gun cover is provided on the gun body assembly in a snap-fit connection, a wrench is provided at the bottom of the liquid outlet pipe, and the top of the wrench is rotatably connected to the liquid outlet pipe through a pin.

[0012] Preferably, a plastic spring is provided between the gun body assembly and the wrench, and one side of the plastic spring is movably connected to the gun body assembly, and both ends of the plastic spring abut against the inner side of the wrench.

[0013] Preferably, a water diversion sleeve and a head cap are installed on the liquid outlet pipe away from the opening of the liquid inlet channel, and the water diversion sleeve is located inside the head cap.

[0014] Preferably, a large circle is provided at the bottom of the gun body assembly, and the top end of the inner side wall of the large circle is buckled between the pressure cover assembly and the gun body assembly, and the pressure cover assembly is located inside the large circle.

[0015] Preferably, a gasket is provided inside the large circle, and the gasket is clip-fitted onto the two extension plates. A straw is provided at the bottom of the large circle, and the top end of the straw is movably inserted into the interior of the extension tube.

[0016] Technical effects and advantages of the present invention:

[0017] The present invention replaces the pump body, sealing plug, and valve of a traditional spray gun with the gland assembly and the lower valve assembly through the arrangement of the gland assembly and the lower valve assembly. The lower valve assembly has a certain elasticity, and when in use, the lower valve assembly can slide up and down a certain distance. When the wrench is pressed, because liquid enters the interior of the seal and the internal pressure of the seal is high, the lower valve assembly is deformed and slides downward, the limiter is blocked by the sealing column, and the seal is connected with the bottom opening of the liquid inlet channel, so that the liquid is sprayed out. When the wrench is loosened, due to the drop in the internal pressure of the seal, the lower valve assembly recovers its deformation and blocks the bottom opening of the liquid inlet channel again, and the limiter opens. Due to the negative pressure inside the gun body assembly, liquid can be replenished into the interior of the seal through the limiter. Therefore, only the gland assembly and the lower valve assembly are required to realize the functions of the pump body, sealing plug and valve of the traditional spray gun, while reducing the number of parts of the spray gun. The gland assembly and the lower valve assembly have a simple structure and are convenient to assemble. At the same time, the gland assembly and the lower valve assembly are made of the same material as the entire spray gun, and are easy to recycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall exploded three-dimensional structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0020] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at point A.

[0021] Figure 4 It is a schematic diagram of the gun body assembly structure of the present invention.

[0022] Figure 5 It is a structural schematic diagram of the connection method of the lower valve assembly and the gland assembly of the present invention.

[0023] Figure 6 It is a structural schematic diagram of the gland assembly of the present invention.

[0024] Figure 7 It is a structural schematic diagram of the lower valve assembly of the present invention.

[0025] In the figure: 1. Gun body assembly; 2. Gland assembly; 3. Lower valve assembly; 4. Large circle; 5. Piston; 6. Piston rod; 7. Wrench; 8. Plastic spring; 9. Water distribution sleeve; 10. Head cap; 11. Suction tube; 12. Gasket; 13. Gun cover; 101. Liquid outlet pipe; 102. Piston tube; 103. Liquid inlet channel; 104. Limiting ring; 201. Support plate; 202. First set of rings; 203. Second set of rings; 204. Sealing column; 205. Extension tube; 206. Liquid suction port; 207. Extension plate; 208. Ventilation port; 301. Sealing member; 302. Reset member; 303. Gasket; 304. Limiting member; 305. Reset position; 306. First liquid storage tank; 307. Second liquid storage tank; 308. Sealing groove; 309. Limiting groove. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0027] like Figure 1-7As shown, the present invention provides a novel all-plastic spray gun with an internal structure, including a gun body assembly 1, the gun body assembly 1 includes a liquid outlet pipe 101, the bottom end of the liquid outlet pipe 101 is integrally provided with a piston tube 102, the bottom end of the piston tube 102 is close to the side of the liquid inlet channel 103 and is located on the top of the sealing member 301, one side of the piston tube 102 is integrally provided with a liquid inlet channel 103, and the top of the liquid inlet channel 103 is integrally formed with and connected to one end of the liquid outlet pipe 101, the bottom end of the piston tube 102 is integrally provided with a limiting ring 104, the limiting ring 104 is divided into an outer ring and an inner ring, the outer ring is clamped between the first ring 202 and the second ring 203, and the inner ring presses the top of the extended part of the gasket ring 303 The bottom end of the limiting ring 104 is connected with the inner ring of the limiting ring 104, and the bottom end of the limiting ring 104 is connected with a pressure cover assembly 2 at the bottom end. The lower valve assembly 3 is provided inside the pressure cover assembly 2. The pump body, sealing plug and valve of the traditional spray gun are replaced by the pressure cover assembly 2 and the lower valve assembly 3. The lower valve assembly 3 can slide up and down a certain distance, and the lower valve assembly 3 has a certain elasticity. When the wrench 7 is pressed, the liquid enters the inside of the seal 301, the internal pressure of the seal 301 is large, and the lower valve assembly 3 is deformed and slides downward. The limiting part 304 is blocked by the sealing column 204, and at the same time, the seal 301 is connected with the bottom opening of the liquid inlet channel 103, so that the liquid is sprayed out. When the wrench 7 is loosened, due to the sealing The internal pressure of the seal 301 drops, and the lower valve assembly 3 recovers its deformation, sealing the bottom opening of the liquid inlet channel 103 again, while the limiter 304 opens. Due to the negative pressure inside the gun body assembly 1, liquid can be replenished to the inside of the seal 301 through the limiter 304. Therefore, only the gland assembly 2 and the lower valve assembly 3 are needed to realize the functions of the pump body, sealing plug and valve of the traditional spray gun, reducing the number of spray gun parts. The gland assembly 2 and the lower valve assembly 3 have a simple structure and are easy to assemble. At the same time, the gland assembly 2 and the lower valve assembly 3 are made of the same material as the entire spray gun, and are easy to recycle. A gun cover 13 is provided on the gun body assembly 1 with a snap-fit sleeve, and a wrench 7 is provided at the bottom of the liquid outlet pipe 101, and the top of the wrench 7 is rotated with the liquid outlet pipe 101 through a pin shaft. Connection, a plastic spring 8 is provided between the gun body assembly 1 and the wrench 7, and one side of the plastic spring 8 is movably buckled with the gun body assembly 1, and the two ends of the plastic spring 8 are against the inner side of the wrench 7, and a water diversion sleeve 9 and a head cap 10 are installed at the opening of the liquid outlet pipe 101 away from the liquid inlet channel 103, and the water diversion sleeve 9 is located inside the head cap 10, a large circle 4 is provided at the bottom of the gun body assembly 1, and the top end of the inner wall of the large circle 4 is buckled between the pressure cover assembly 2 and the gun body assembly 1, the pressure cover assembly 2 is located inside the large circle 4, a gasket 12 is provided inside the large circle 4, and the gasket 12 is snap-fitted on the two extension plates 207, a straw 11 is provided at the bottom of the large circle 4, and the top end of the straw 11 is movably inserted into the extension tube 205.

[0028] The pressure cover assembly 2 includes a support plate 201, and an annular groove is provided on the top of the support plate 201. The annular groove is located inside the second ring 203 and is adapted to the gasket 303 for limiting the gasket 303. The top edge of the support plate 201 is integrally formed with a first ring 202 and a second ring 203, and the second ring 203 is located inside the first ring 202. A liquid suction port 206 is provided through the middle of the support plate 201, and an extension tube 205 adapted to the liquid suction port 206 is integrally formed in the middle of the bottom end of the support plate 201. The bottom end of the inner side wall of the extension tube 205 is inclined to facilitate the insertion of the straw 11, and an arc-shaped ridge is provided at the junction of the inclined surface and the inner side surface to facilitate the clamping of the straw 11 and prevent the straw 11 from detaching. One side of the inner wall of the liquid suction port 206 is integrally formed with The sealing column 204, and the top of the sealing column 204 extends to the inside of the second ring 203, the top of the sealing column 204 is set in a truncated cone shape, the sealing column 204 movably passes through the limit piece 304, and the bottom end of the outer wall of the support plate 201 is integrally formed with an extension plate 207 on both sides, and the extension plate 207 is set in an arc shape. Ventilation ports 208 are opened on both sides of the top of the support plate 201, and the two ventilation ports 208 are respectively located on both sides of the bottom of the second ring 203. The ventilation ports 208 are used to keep the air pressure in the bottle consistent with the external air pressure to prevent the air pressure from being too low, resulting in low air pressure in the bottle, inability to continue to replenish fluid, and the bottle being deformed by external air pressure. Multiple extension plates 207 form a circle, and the bottom end of the outer wall of the extension plate 207 is provided with an arc-shaped bulge to facilitate the clamping column gasket 12.

[0029] The top of the seal 301 is provided with a reset member 302, and the top of the reset member 302 is integrally formed with the bottom end of the outer wall of the seal 301. The bottom end of the reset member 302 is surrounded by a gasket 303. The outer side of the gasket 303 extends outward for a part, and the top of this part is pressed by the inner ring of the limiting ring 104. The inner ring of the limiting ring 104 cooperates with the annular groove at the top of the support plate 201, so that when the lower valve assembly 3 is deformed, the gasket 303 will not jump with the lower valve assembly 3, causing liquid to leak into the inside of the limiting ring 104, affecting the normal liquid replenishment, thereby affecting the spray effect. The top of the seal 301 is penetrated by a first liquid storage tank 306, and the bottom of the reset member 302 is provided with a gasket 303. A second liquid storage tank 307 is provided through the part, a limiting member 304 is provided at the inner lower end of the sealing member 301, and the bottom end of the limiting member 304 extends to the inner upper end of the reset member 302, and the outer side wall of the limiting member 304 is integrally formed with a reset point 305, and the outer side of the reset point 305 is integrally formed with the bottom end of the sealing member 301, a limiting groove 309 is provided at the bottom end of the limiting member 304, a sealing groove 308 is provided at the top of the limiting groove 309, and the sealing groove 308 is adapted to the top end of the sealing column 204, the first liquid storage tank 306 and the second liquid storage tank 307 are separated by the limiting member 304 and the reset point 305, the bottom end of the gasket ring 303 is fitted with the top of the support plate 201, and the reset point 305 is arranged in an arc shape.

[0030] Working principle of the present invention:

[0031] When used for the first time, when the wrench 7 is pressed, the plastic spring 8 is deformed, and the piston rod 6 and the piston 5 are driven by manual or mechanical force to move, forming high pressure in the closed cavity. The high-pressure gas inside the piston tube 102 causes the lower valve assembly 3 to deform downward, thereby opening the bottom opening of the liquid inlet channel 103. At the same time, the sealing column 204 blocks the limiter 304, and the high-pressure air is discharged through the liquid inlet channel 103 and the liquid outlet pipe 101. After the high-pressure air is discharged, the lower valve assembly 3 recovers its deformation, and the bottom opening of the liquid inlet channel 103 is blocked, and then the handle is released. The wrench 7 and the plastic spring 8 recover their deformation, driving the wrench 7, the piston rod 6 and the piston 5 to recover their initial positions. During the recovery, the liquid inlet channel 103 is blocked and air cannot be introduced, thereby causing negative pressure inside the piston tube 102. The negative pressure causes the lower valve assembly 3 to deform upward. Since the top of the sealing column 204 is in a frustum shape, when the lower valve assembly 3 is pulled upward, the inner side wall of the sealing groove 308 is separated from the top of the sealing column 204, thereby opening the limit member 304, so that the limit member 304 is connected to the interior of the reset member 302, thereby the first The first liquid storage tank 306 is connected to the second liquid storage tank 307. Due to the negative pressure, the straw 11 sucks the liquid into the second liquid storage tank 307, the first liquid storage tank 306 and the piston tube 102. When the liquid is sucked in, the liquid level in the bottle drops, the air pressure becomes low, and the outside air enters the bottle from the ventilation port 208, so that the air pressure in the bottle is kept consistent with the outside air pressure. The wrench 7 is pressed again. Due to the high pressure inside the piston tube 102, the lower valve assembly 3 is deformed downward, and the inner wall of the sealing groove 308 is in contact with the top of the sealing column 204. The limiter 30 4 is blocked by the sealing column 204, and the liquid cannot be discharged from the limiter 304. At the same time, the liquid inside the piston tube 102 is pressed into the first liquid storage tank 306, and the lower valve assembly 3 is deformed downward to open the bottom opening of the liquid inlet channel 103. The liquid inside the first liquid storage tank 306 passes through the liquid inlet channel 103 and the liquid outlet pipe 101, and is finally sprayed out through the water diversion sleeve 9 and the head cap 10. After loosening the wrench 7, the plastic spring 8 recovers its deformation and replenishes the liquid into the piston tube 102 again. This cycle can be used normally.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new type of all-plastic spray gun with an internal structure, characterized by: The gun body assembly (1) includes a liquid outlet pipe (101), the bottom end of the liquid outlet pipe (101) is integrally provided with a piston tube (102), one side of the piston tube (102) is integrally provided with a liquid inlet channel (103), and the top end of the liquid inlet channel (103) is integrally formed with and communicated with one end of the liquid outlet pipe (101), the bottom end of the piston tube (102) is integrally provided with a limiting ring (104), and the bottom end of the liquid inlet channel (103) is communicated with the limiting ring (104), the bottom end of the limiting ring (104) is snap-connected with a pressure cover assembly (2), and the interior of the pressure cover assembly (2) is provided with a lower valve assembly (3); The gland assembly (2) comprises a support plate (201), a first ring (202) and a second ring (203) are integrally formed around the top edge of the support plate (201), and the second ring (203) is located inside the first ring (202); a liquid suction port (206) is provided through the middle of the support plate (201), an extension tube (205) adapted to the liquid suction port (206) is integrally formed in the middle of the bottom end of the support plate (201), a sealing column (204) is integrally formed on the inner wall of one side of the liquid suction port (206), and the top end of the sealing column (204) extends to the inside of the second ring (203), and the top end of the sealing column (204) is arranged in a truncated cone shape; The lower valve assembly (3) includes a sealing member (301), a reset member (302) is provided at the bottom of the sealing member (301), and the top of the reset member (302) is integrally formed with the bottom end of the outer wall of the sealing member (301), a gasket (303) is integrally formed around the bottom end of the reset member (302), a first liquid storage tank (306) is provided through the top of the sealing member (301), a second liquid storage tank (307) is provided through the bottom of the reset member (302), a limit member (304) is provided at the lower end of the interior of the sealing member (301), and the limit member (304) The bottom end extends to the inner upper end of the reset member (302), the outer side wall of the limiting member (304) is integrally formed with a reset position (305), and the outer side of the reset position (305) is integrally formed with the bottom end of the sealing member (301), the bottom end of the limiting member (304) is provided with a limiting groove (309), the top end of the limiting groove (309) is penetrated by a sealing groove (308), and the sealing groove (308) is adapted to the top end of the sealing column (204), and the first liquid storage tank (306) and the second liquid storage tank (307) are separated by the limiting member (304) and the reset position (305).

2. The novel all-plastic spray gun with an internal structure according to claim 1, characterized in that: The sealing column (204) movably penetrates the limiting member (304), and both sides of the bottom end of the outer wall of the support plate (201) are integrally formed with extension plates (207), and the extension plates (207) are arranged in an arc shape. Both sides of the top end of the support plate (201) are penetrated by ventilation ports (208), and the two ventilation ports (208) are respectively located on both sides of the bottom of the second ring (203).

3. The novel all-plastic spray gun with an internal structure according to claim 2, characterized in that: The bottom end of the gasket ring (303) is fitted and connected to the top end of the support plate (201), and the reset portion (305) is arranged in an arc shape.

4. The novel all-plastic spray gun with an internal structure according to claim 3, characterized in that: A gun cover (13) is provided on the gun body assembly (1) in a snap-fit connection, a wrench (7) is provided at the bottom of the liquid outlet pipe (101), and the top of the wrench (7) is rotatably connected to the liquid outlet pipe (101) via a pin shaft.

5. The novel all-plastic spray gun with internal structure according to claim 4, characterized in that: A plastic spring (8) is provided between the gun body assembly (1) and the wrench (7), and one side of the plastic spring (8) is movably connected to the gun body assembly (1), and both ends of the plastic spring (8) are against the inner side of the wrench (7).

6. The novel all-plastic spray gun with an internal structure according to claim 5, characterized in that: A water distribution sleeve (9) and a head cap (10) are installed at the opening of the liquid outlet pipe (101) away from the liquid inlet channel (103), and the water distribution sleeve (9) is located inside the head cap (10).

7. The novel all-plastic spray gun with an internal structure according to claim 6, characterized in that: A large circle (4) is provided at the bottom of the gun body assembly (1), and the top end of the inner wall of the large circle (4) is buckled between the pressure cover assembly (2) and the gun body assembly (1), and the pressure cover assembly (2) is located inside the large circle (4).

8. The novel all-plastic spray gun with an internal structure according to claim 7, characterized in that: A gasket (12) is provided inside the large circle (4), and the gasket (12) is buckled and sleeved on the two extension plates (207). A straw (11) is provided at the bottom of the large circle (4), and the top end of the straw (11) is movably inserted into the interior of the extension tube (205).

Images