A new type of full plastic spray gun with internal structure

Abstract

The utility model discloses a novel full -plastic spray gun of internal structure relates to spray gun technical field, including gun body assembly, and gun body assembly includes liquid outlet pipe, and the bottom end of liquid outlet pipe integrative forming is provided with piston pipe, and the one side integrative forming of piston pipe is provided with liquid inlet channel, and the top of liquid inlet channel is integrative with one end of liquid outlet pipe and is communicated, and the bottom end of piston pipe integrative forming is provided with the limit ring, and the bottom end of liquid inlet channel is communicated with the limit ring. The utility model discloses through the setting of gland assembly and lower valve assembly, replaces the pump body, sealing plug and valve of traditional spray gun with gland assembly and lower valve assembly, and lower valve assembly has certain elasticity, and when using, the function of the pump body, sealing plug and valve of traditional spray gun can be realized to gland assembly and lower valve assembly, reduces spray gun parts while gland assembly and lower valve assembly structure is simple, and convenient assembly, and the material quality of gland assembly and lower valve assembly is consistent with whole spray gun simultaneously, and recycling is convenient.

Description

Technical Field

[0001] This utility model relates to the field of spray gun technology, and in particular to a novel all-plastic spray gun with a novel internal structure. Background Technology

[0002] A spray gun is a common spraying tool used in daily life for disinfection, cleaning, and watering plants. Most spray guns on the market consist of a nozzle, outer shell, gun body, trigger, piston, spring, sealing plug or valve, pump body, and bottle. Its working principle is that the trigger pushes the piston and spring, causing the piston to move within the gun body. Gas flows through the gun body and is ejected from the nozzle. Releasing the trigger causes the spring to return the piston to its original position, reducing the pressure inside the gun body while maintaining the same pressure inside the bottle. This pressure difference between the gun body and the bottle draws liquid from the bottle into the gun body, pushing open the sealing plug. Pulling the trigger then causes the liquid to spray out from the nozzle.

[0003] Existing spray guns use the combination of springs and pistons to change the pressure inside the gun body, and use sealing plugs or valves 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 all-plastic spray gun with a novel internal structure to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a novel all-plastic spray gun with a novel internal structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel all-plastic spray gun with an internal structure, comprising a gun body assembly, the gun body assembly comprising a liquid outlet pipe, a piston tube integrally formed at the bottom end of the liquid outlet pipe, a liquid inlet channel integrally formed on one side of the piston tube, the top end of the liquid inlet channel integrally formed and connected to one end of the liquid outlet pipe, a limit ring integrally formed at the bottom end of the piston tube, and the bottom end of the liquid inlet channel connected to the limit ring, a pressure cap assembly snapped onto the bottom end of the limit ring, and a lower valve assembly disposed inside the pressure cap assembly;

[0007] The capping assembly includes a tray, with a first ring and a second ring integrally formed around the top edge of the tray, the second ring being located inside the first ring, a liquid suction port being formed through the middle of the tray, an extension tube adapted to the liquid suction port being integrally formed at the bottom center of the tray, and a sealing post being integrally formed on one side inner wall of the liquid suction port, with the top of the sealing post extending into the inside of the second ring;

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

[0009] Preferably, the top of the sealing column is truncated cone-shaped, the sealing column moves through the limiting member, the bottom of the outer side wall of the support plate is integrally formed with an extension plate on both sides, and the extension plate is arc-shaped. The top of the support plate is provided with ventilation ports on both sides, 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 washer is fitted and connected to the top end of the support plate, and the reset point is arc-shaped.

[0011] Preferably, a gun cover is snap-fitted onto the gun body assembly, and a wrench is provided at the bottom of the liquid outlet pipe, with the top of the wrench rotatably connected to the liquid outlet pipe via 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 fastened to the gun body assembly, and both ends of the plastic spring abut against the inside of the wrench.

[0013] Preferably, a water-dividing sleeve and a cap are installed at the opening of the outlet pipe away from the inlet channel, and the water-dividing sleeve is located inside the cap.

[0014] Preferably, the bottom of the gun body assembly is provided with a large circle, and the top of the inner sidewall of the large circle is fastened between the cover assembly and the gun body assembly, and the cover assembly is located inside the large circle.

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

[0016] The technical effects and advantages of this utility model are as follows:

[0017] This invention replaces the pump body, sealing plug, and valve of a traditional spray gun with a gland assembly and a lower valve assembly. The lower valve assembly has a certain degree of elasticity and can slide up and down a certain distance during use. When the wrench is pressed, the liquid enters the seal, and the internal pressure of the seal is high, causing the lower valve assembly to deform and slide downward. The limiting member is blocked by the sealing post, and at the same time, the seal is connected to the bottom opening of the liquid inlet channel, allowing the liquid to spray out. When the wrench is released, the internal pressure of the seal decreases, the lower valve assembly returns to its original shape, and the bottom opening of the liquid inlet channel is blocked again. The limiting member opens, and due to the negative pressure inside the gun body assembly, liquid can be replenished to the seal through the limiting member. Thus, only the gland assembly and the lower valve assembly are needed to achieve the functions of the pump body, sealing plug, and valve of a traditional spray gun, reducing the number of spray gun parts. The gland assembly and the lower valve assembly have a simple structure and are easy to assemble. In addition, the gland assembly and the lower valve assembly are made of the same material as the entire spray gun, making them easy to recycle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall exploded three-dimensional structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0020] Figure 3 For the present utility model Figure 2 An enlarged schematic diagram of the structure at point A.

[0021] Figure 4 This is a schematic diagram of the gun body assembly structure of this utility model.

[0022] Figure 5 This is a schematic diagram of the connection structure between the lower valve assembly and the gland assembly of this utility model.

[0023] Figure 6 This is a schematic diagram of the structure of the cap assembly of this utility model.

[0024] Figure 7 This is a schematic diagram of the lower valve assembly of this utility model.

[0025] In the diagram: 1. Gun body assembly; 2. Cap assembly; 3. Lower valve assembly; 4. Large ring; 5. Piston; 6. Piston rod; 7. Wrench; 8. Plastic spring; 9. Water distribution sleeve; 10. Cap; 11. Suction tube; 12. Gasket; 13. Gun cover; 101. Liquid outlet tube; 102. Piston tube; 103. Liquid inlet channel; 104. Limiting ring; 201. Support plate; 202. First ring; 203. Second ring; 204. Sealing post; 205. Extension tube; 206. Suction port; 207. Extension plate; 208. Vent; 301. Seal; 302. Reset component; 303. Gasket ring; 304. Limiting component; 305. Reset point; 306. First liquid storage tank; 307. Second liquid storage tank; 308. Sealing groove; 309. Limiting groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1-7As shown, this utility model provides a novel all-plastic spray gun with a novel internal structure, including a gun body assembly 1. The gun body assembly 1 includes a liquid outlet pipe 101. A piston pipe 102 is integrally formed at the bottom end of the liquid outlet pipe 101. A through hole is formed on the side of the bottom end of the piston pipe 102 near the liquid inlet channel 103 and is located at the top of the sealing member 301. A liquid inlet channel 103 is integrally formed on one side of the piston pipe 102, and the top end of the liquid inlet channel 103 is integrally formed and connected to one end of the liquid outlet pipe 101. A limiting ring 104 is integrally formed at the bottom end of the piston pipe 102. The limiting ring 104 is divided into an outer ring and an inner ring. The outer ring is engaged between the first set of rings 202 and the second set of rings 203, and the inner ring presses against the extension portion of the gasket ring 303. The top and bottom end of the liquid inlet channel 103 are connected to the inner ring of the limiting ring 104. The bottom end of the limiting ring 104 is snap-fitted with a pressure cap assembly 2. The pressure cap assembly 2 contains a lower valve assembly 3. The pump body, sealing plug, and valve of the traditional spray gun are replaced by the pressure cap assembly 2 and the lower valve assembly 3. The lower valve assembly 3 can slide up and down a certain distance and has a certain elasticity. When the wrench 7 is pressed, because the liquid enters the seal 301, the internal pressure of the seal 301 is high, and the lower valve assembly 3 deforms and slides downward. The limiting element 304 is blocked by the sealing post 204. At the same time, the seal 301 is connected to the bottom opening of the liquid inlet channel 103, so that the liquid is sprayed out. When the wrench 7 is released, because the liquid enters the seal 301, the pressure inside ... The internal pressure of the seal 301 decreases, the lower valve assembly 3 returns to its original deformation, and re-blocks the bottom opening of the liquid inlet channel 103. Meanwhile, the limiting member 304 opens. Due to the negative pressure inside the gun body assembly 1, liquid can be replenished to the seal 301 through the limiting member 304. Thus, only the gland assembly 2 and the lower valve assembly 3 are needed to achieve the functions of the pump body, sealing plug, and valve of a traditional spray gun. This reduces the number of spray gun parts. The gland assembly 2 and the lower valve assembly 3 have simple structures 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, making them easy to retrieve. The gun body assembly 1 is fitted with a gun cover 13 with a snap-fit. A wrench 7 is provided at the bottom of the liquid outlet pipe 101, and the top of the wrench 7 is connected to the liquid outlet pipe 101 by a pin. 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 fastened to the gun body assembly 1. The two ends of the plastic spring 8 abut against the inside of the wrench 7. A water-dividing sleeve 9 and a cap 10 are installed at the opening of the liquid outlet pipe 101 away from the liquid inlet channel 103, and the water-dividing sleeve 9 is located inside the cap 10. A large ring 4 is provided at the bottom of the gun body assembly 1, and the top of the inner side wall of the large ring 4 is fastened between the pressure cap assembly 2 and the gun body assembly 1. The pressure cap assembly 2 is located inside the large ring 4. A gasket 12 is provided inside the large ring 4, and the gasket 12 is snapped onto the two extension plates 207. A suction tube 11 is provided at the bottom of the large ring 4, and the top of the suction tube 11 is movably inserted into the extension tube 205.

[0028] The capping assembly 2 includes a tray 201. The top of the tray 201 has an annular groove located inside a second ring 203 and adapted to a gasket 303 for limiting the gasket 303. A first ring 202 and a second ring 203 are integrally formed around the top edge of the tray 201, with the second ring 203 located inside the first ring 202. A suction port 206 is provided through the center of the tray 201. An extension tube 205 adapted to the suction port 206 is integrally formed at the center of the bottom end of the tray 201. The bottom end of the inner wall of the extension tube 205 is inclined to facilitate the insertion of a straw 11, and an arc-shaped bulge is provided at the junction of the inclined surface and the inner surface to secure the straw 11 and prevent it from detaching. One side of the inner wall of the suction port 206 is integrally formed with... A sealing column 204 is provided, with its top end extending into the interior of the second ring 203. The top end of the sealing column 204 is truncated cone-shaped. The sealing column 204 movably passes through the limiting member 304. An extension plate 207 is integrally formed on both sides of the bottom of the outer wall of the support plate 201, and the extension plate 207 is arc-shaped. A ventilation port 208 is provided on both sides of the top of the support plate 201, and the two ventilation ports 208 are located on both sides of the bottom of the second ring 203. The ventilation ports 208 are used to keep the air pressure inside the bottle consistent with the external air pressure, to prevent the air pressure from being too low, which would prevent the bottle from being able to continue replenishing the liquid, and to prevent the bottle from being deformed by the external air pressure. Multiple extension plates 207 form a circle, and the bottom of the outer wall of the extension plate 207 is provided with an arc-shaped bulge to facilitate the locking of the column gasket 12.

[0029] The lower valve assembly 3 includes a seal 301, a reset member 302 at the bottom of the seal 301, and the top of the reset member 302 is integrally formed with the bottom of the outer wall of the seal 301. A gasket 303 is integrally formed around the bottom of the reset member 302. The outer side of the gasket 303 extends outward, 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 on the top of the support plate 201, so that when the lower valve assembly 3 deforms, the gasket 303 will not jump with the lower valve assembly 3, causing liquid to leak into the interior of the limiting ring 104, affecting the normal replenishment of liquid, and thus affecting the spraying effect. A first liquid storage groove 306 is formed through the top of the seal 301, and the bottom of the reset member 302... The first liquid storage tank 307 is provided through the second liquid storage tank 307. The lower end of the seal 301 is provided with a limiting member 304, and the bottom end of the limiting member 304 extends to the upper end of the reset member 302. The outer 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 seal 301. The bottom end of the limiting member 304 is provided with a limiting groove 309, and the top end of the limiting groove 309 is provided with a sealing groove 308, which 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 303 is attached to the top end of the support plate 201. The reset point 305 is arc-shaped.

[0030] Working principle of this utility model:

[0031] Upon initial use, when the wrench 7 is pressed, the plastic spring 8 deforms, manually or mechanically driving the piston rod 6 and piston 5 to move, creating high pressure within the sealed cavity. The high-pressure gas inside the piston tube 102 causes the lower valve assembly 3 to deform downwards, thereby opening the bottom opening of the liquid inlet channel 103. Simultaneously, the sealing column 204 blocks the limiting element 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 returns to its original deformation, sealing the bottom opening of the liquid inlet channel 103. Then, the wrench is released. When the wrench 7 and plastic spring 8 return to their original deformation, they move the wrench 7, piston rod 6, and piston 5 back to their initial positions. During this return, because the inlet channel 103 is blocked, air cannot enter, creating a negative pressure inside the piston tube 102. This negative pressure causes the lower valve assembly 3 to deform upwards. Since the top of the sealing column 204 is frustoconical, when the lower valve assembly 3 is pulled upwards, the inner wall of the sealing groove 308 disengages from the top of the sealing column 204, thereby opening the limiting member 304 and connecting the limiting member 304 with the interior of the reset member 302, thus... A liquid storage tank 306 is connected to a second liquid storage tank 307. Due to negative pressure, the suction tube 11 draws liquid into the second liquid storage tank 307, the first liquid storage tank 306, and the piston tube 102. When the liquid is drawn in, the liquid level in the bottle drops, the air pressure decreases, and external gas enters the bottle through the vent 208, keeping the gas pressure inside the bottle consistent with the external air pressure. Pressing the wrench 7 again causes the lower valve assembly 3 to deform downwards due to the high pressure inside the piston tube 102. The inner wall of the sealing groove 308 adheres to the top of the sealing column 204, and the limiting member 30... 4 is blocked by the sealing column 204, and the liquid cannot be discharged from the limiting member 304. At the same time, the liquid inside the piston tube 102 is forced into the first liquid storage tank 306. The lower valve assembly 3 deforms downward, opening 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 finally sprays out through the water distribution sleeve 9 and the head cap 10. After the wrench 7 is released, the plastic spring 8 returns to its deformation and replenishes the liquid inside the piston tube 102 again. This cycle can be repeated for normal use.

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

Claims

1. A novel all-plastic spray gun with a unique internal structure, characterized in that: The gun assembly includes a gun body assembly (1), which includes a liquid outlet pipe (101). A piston pipe (102) is integrally formed at the bottom end of the liquid outlet pipe (101). A liquid inlet channel (103) is integrally formed on one side of the piston pipe (102). The top end of the liquid inlet channel (103) is integrally formed and connected to one end of the liquid outlet pipe (101). A limit ring (104) is integrally formed at the bottom end of the piston pipe (102). The bottom end of the liquid inlet channel (103) is connected to the limit ring (104). A cap assembly (2) is snap-fitted to the bottom end of the limit ring (104). A lower valve assembly (3) is provided inside the cap assembly (2). The cap assembly (2) includes a tray (201). The top edge of the tray (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). The middle part of the tray (201) is provided with a liquid suction port (206). The bottom middle part of the tray (201) is integrally formed with an extension tube (205) adapted to the liquid suction port (206). A sealing post (204) is integrally formed on one side inner wall of the liquid suction port (206), and the top of the sealing post (204) extends into the interior of the second ring (203). The top of the sealing post (204) is frustum-shaped. The lower valve assembly (3) includes a seal (301), a reset member (302) is provided at the bottom of the seal (301), and the top of the reset member (302) is integrally formed with the bottom of the outer wall of the seal (301). A gasket (303) is integrally formed around the bottom of the reset member (302). A first liquid storage groove (306) is provided through the top of the seal (301), and a second liquid storage groove (307) is provided through the bottom of the reset member (302). A limiting member (304) is provided at the lower inner end of the seal (301). The bottom end extends to the upper inner end of the reset member (302). 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). The bottom end of the limiting member (304) is provided with a limiting groove (309). The top end of the limiting groove (309) is provided with a sealing groove (308), 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).

2. The all-plastic spray gun with a novel internal structure according to claim 1, characterized in that: The sealing column (204) is movable through the limiting member (304). The outer side wall of the tray (201) is integrally formed with extension plates (207) on both sides, and the extension plates (207) are arc-shaped. The top two sides of the tray (201) are provided with ventilation ports (208), and the two ventilation ports (208) are located on the bottom sides of the second ring (203).

3. The all-plastic spray gun with a novel internal structure according to claim 2, characterized in that: The bottom end of the washer (303) is fitted and connected to the top end of the support plate (201), and the reset point (305) is arc-shaped.

4. The all-plastic spray gun with a novel internal structure according to claim 3, characterized in that: The gun body assembly (1) is fitted with a gun cover (13) with a snap-fit. 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) through a pin.

5. The all-plastic spray gun with a novel 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) abut against the inside of the wrench (7).

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

7. The all-plastic spray gun with a novel internal structure according to claim 6, characterized in that: The bottom of the gun body assembly (1) is provided with a large ring (4), and the top of the inner side wall of the large ring (4) is fastened between the cover assembly (2) and the gun body assembly (1). The cover assembly (2) is located inside the large ring (4).

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

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