Valve structure of a new type of spray gun

Abstract

The utility model discloses a valve structure of novel spray gun relates to spray gun technical field, including spray gun and be applied to spray gun's gland assembly and lower valve assembly, and spray gun includes the gun body, and the gland assembly buckle is set up in the bottom of gun body, and the top of gland assembly swingly is provided with lower valve assembly. The utility model discloses through the setting of gland assembly and lower valve assembly, replaces the pump body and valve or sealing plug of traditional spray gun, and lower valve assembly can slide a certain distance up and down, and lower valve assembly has certain elasticity, compared with the structure of traditional spray gun, and the gland assembly and lower valve assembly are all integrated structure, and the simple structure is convenient for production assembly, and the material quality of the whole spray gun is consistent with the gland assembly and lower valve assembly simultaneously, and is convenient for recycling.

Description

Technical Field

[0001] This utility model relates to the field of spray gun technology, and in particular to a novel valve structure for a spray gun. 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 utilize piston movement to change the pressure inside the gun body, and use springs and sealing plugs or valves to seal and conduct 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 valve structure for spray guns to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a novel valve structure for a spray gun 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 valve structure for a spray gun, comprising a spray gun and a cap assembly and a lower valve assembly applied to the spray gun, wherein the spray gun comprises a gun body, the cap assembly is snapped onto the bottom end of the gun body, and the lower valve assembly is movably disposed on the top end of the cap assembly; The cap assembly includes a tray, a liquid suction port is provided through the middle of the tray, and a sealing post is integrally formed on one side inner wall of the liquid suction port, with the top of the sealing post being frustoconical. The lower valve assembly includes a sealing groove, a liquid storage tank is provided at the bottom of the sealing groove, and the top of the liquid storage tank is integrally formed with the bottom of the outer side wall of the sealing groove. A limiting groove is provided at the lower inner end of the sealing groove, and the bottom of the limiting groove extends to the upper inner end of the liquid storage tank. A reset point is integrally formed around the outer side wall of the limiting groove, and the outer side of the reset point is integrally formed with the bottom of the sealing groove.

[0007] Preferably, the top edge of the pallet is integrally formed with a first extension cylinder and a second extension cylinder, and the second extension cylinder is located inside the first extension cylinder. Ventilation ports are provided through both sides of the top of the pallet, and the ventilation ports are located on both sides of the bottom of the second extension cylinder.

[0008] Preferably, an extension tube is integrally formed at the bottom center of the tray, and the inner diameter of the extension tube is the same as the diameter of the liquid suction port.

[0009] Preferably, an annular limiting groove is provided around the center of the top of the pallet, and the annular limiting groove is located inside the second extension cylinder. The sealing column moves through the limiting groove. Extension plates are integrally formed on both sides of the bottom of the outer side wall of the pallet, and the extension plates are arc-shaped.

[0010] Preferably, a gasket is integrally formed around the bottom end of the liquid storage tank, and the outer side of the gasket extends outward, and the gasket is adapted to the annular limiting groove.

[0011] Preferably, the bottom of the gun body is provided with a large circle, which is engaged between the gun body and the cap assembly. The cap assembly is located inside the large circle. The bottom of the large circle is provided with a suction tube, and the top of the suction tube is inserted into the inside of the extension tube.

[0012] The technical effects and advantages of this utility model are as follows: This invention replaces the pump body and valve or sealing plug of a traditional spray gun with a gland assembly and a lower valve assembly. The lower valve assembly can slide up and down a certain distance and has a certain elasticity. When the wrench is pressed, because liquid enters the sealing groove and the pressure inside the sealing groove is high, the lower valve assembly deforms and slides downward. The limiting groove is blocked by the sealing column, and at the same time, the sealing groove is connected to the opening at point a in the figure, allowing liquid to spray out. When the wrench is released, because the pressure inside the sealing groove drops, the lower valve assembly returns to its deformation, blocking the bottom opening of the liquid inlet channel again, and the limiting groove opens. Due to the negative pressure inside the gun body assembly, liquid can be replenished into the sealing groove through the limiting groove. The gland assembly and the lower valve assembly can realize the functions of the pump body and sealing plug or valve of a traditional spray gun. Compared with the structure of a traditional spray gun, the gland assembly and the lower valve assembly are both integrally molded structures, which are simple in structure and convenient for production and assembly. At the same time, the gland assembly and the lower valve assembly are made of the same material as the entire spray gun, making recycling convenient. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional exploded structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0015] Figure 3 For the present utility model Figure 2 An enlarged schematic diagram of the structure at point A.

[0016] Figure 4 This is a schematic diagram of the connection structure between the gland assembly and the lower valve assembly of this utility model.

[0017] Figure 5 This is a schematic diagram of the cap assembly structure of this utility model.

[0018] Figure 6 This is a schematic diagram of the lower valve assembly structure of this utility model.

[0019] In the diagram: 1. Gun body; 2. Cap assembly; 3. Lower valve assembly; 4. Large ring; 5. Suction tube; 201. Support plate; 202. First extension tube; 203. Second extension tube; 204. Sealing column; 205. Extension tube; 206. Suction port; 207. Extension plate; 208. Annular limiting groove; 209. Vent; 301. Sealing groove; 302. Liquid storage tank; 303. Gasket ring; 304. Limiting groove; 305. Reset point. Detailed Implementation

[0020] 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.

[0021] This utility model provides, for example Figure 1-6 The valve structure of a novel spray gun shown includes a spray gun and a cap assembly 2 and a lower valve assembly 3 applied to the spray gun. The spray gun includes a gun body 1. The cap assembly 2 is snapped onto the bottom end of the gun body 1. The lower valve assembly 3 is movably disposed on the top end of the cap assembly 2. A large ring 4 is disposed at the bottom of the gun body 1 and is snapped between the gun body 1 and the cap assembly 2. The cap assembly 2 is located inside the large ring 4. A suction tube 5 is disposed at the bottom of the large ring 4 and the top end of the suction tube 5 is inserted into the inside of the extension tube 205.

[0022] The cap assembly 2 includes a tray 201. A suction port 206 is provided through the center of the tray 201. A sealing post 204 is integrally formed on one inner wall of the suction port 206, and the top of the sealing post 204 extends into the interior of the second extension cylinder 203. The top of the sealing post 204 is frustoconical, and this frustoconical shape allows the limiting groove 304 to communicate with the interior of the sealing groove 301 when the lower valve assembly 3 deforms upwards. A first extension cylinder 202 and a second extension cylinder 203 are integrally formed around the top edge of the tray 201, with the second extension cylinder 203 located inside the first extension cylinder 202. An extension tube 205 is integrally formed at the center of the bottom end of the tray 201, and the inner diameter of the extension tube 205 is the same as the diameter of the suction port 206. A ring-shaped limiting groove 208 is provided around the top center, and the ring-shaped limiting groove 208 is located inside the second extension cylinder 203. The sealing column 204 moves through the limiting groove 304 and is adapted to the limiting groove 304 to achieve a sealing effect. Both sides of the bottom of the outer wall of the support plate 201 are integrally formed with extension plates 207, and the extension plates 207 are arc-shaped. Multiple extension plates 207 form a circle. Both sides of the top of the support plate 201 are provided with ventilation ports 209, and the ventilation ports 209 are located on both sides of the bottom of the second extension cylinder 203. The ventilation ports 209 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 cause the air pressure inside the bottle to be too low and prevent the bottle from being deformed by the external air pressure.

[0023] The lower valve assembly 3 includes a sealing groove 301, a liquid storage tank 302 at the bottom of the sealing groove 301, and the top of the liquid storage tank 302 is integrally formed with the bottom of the outer wall of the sealing groove 301. A limiting groove 304 is provided at the lower inner end of the sealing groove 301, and the bottom of the limiting groove 304 extends to the upper inner end of the liquid storage tank 302. A reset point 305 is integrally formed around the outer wall of the limiting groove 304, and the outer side of the reset point 305 is integrally formed with the bottom end of the sealing groove 301. The reset point 305 is thin to facilitate deformation. A gasket 303 is integrally formed around the bottom end of the liquid storage tank 302, and the outer side of the gasket 303 extends outward. The gasket 303 and the annular limiting... The top of the outwardly extending portion of the gasket 303 is pressed against the inner ring at the bottom of the gun body 1, which cooperates with the annular limiting groove 208 to restrict the sliding of the gasket 303 and prevent it from jumping up and down with the lower valve assembly 3, thus affecting normal use. The setting of the gland assembly 2 and the lower valve assembly 3 replaces the pump body and valve or sealing plug of the traditional spray gun. The lower valve assembly 3 can slide up and down a certain distance, and it has a certain degree of elasticity. When the wrench is pressed, because liquid enters the sealing groove 301, the pressure inside the sealing groove 301 is high, causing the lower valve assembly 3 to deform and slide downwards. The limiting groove 304 is blocked by the sealing post 204, simultaneously making the sealing groove 301 and the lower valve assembly 3... Figure 3The opening at point a in the middle is connected, allowing liquid to spray out. When the wrench is released, due to the decrease in internal pressure of the sealing groove 301, the lower valve assembly 3 returns to its original shape, blocking the bottom opening of the liquid inlet channel 103 again. Meanwhile, the limiting groove 304 opens. Due to the negative pressure inside the gun body assembly 1, liquid can be replenished into the sealing groove 301 through the limiting groove 304. The gland assembly 2 and the lower valve assembly 3 can realize the functions of the pump body and sealing plug or valve of the traditional spray gun. Compared with the structure of the traditional spray gun, the gland assembly 2 and the lower valve assembly 3 are both integrally molded structures, which are simple in structure and convenient for production and assembly. 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 recycling convenient.

[0024] Working principle of this utility model: Upon initial use, pressing the wrench deforms the plastic spring, manually or mechanically driving the piston rod and piston to move, creating high pressure within the sealed cavity. The high-pressure gas inside the gun body 1 causes the lower valve assembly 3 to deform downwards, thereby opening the valve. Figure 3 The opening at point a is simultaneously sealed by the sealing column 204, blocking the limiting groove 304, allowing high-pressure air to pass through. Figure 3 The opening at point b leads into the sealing groove 301, and finally through... Figure 3 After the high-pressure air is discharged through the opening at point a and the liquid outlet channel, the lower valve assembly 3 returns to its original shape. Figure 3 The opening at point a is sealed, then the wrench is released. The plastic spring returns to its original deformation, causing the wrench, piston rod, and piston to return to their initial positions. During this return, due to... Figure 3 The opening at point a is blocked, preventing air intake and creating negative pressure inside the gun body 1. 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, it opens the limiting groove 304, connecting the limiting groove 304 with the interior of the liquid storage tank 302, and thus connecting it with the extension tube 205 and the suction tube 5. Due to the negative pressure, the suction tube 5 draws liquid into the liquid storage tank 302, and then through the limiting groove 304 into the sealing groove 302. 01. Finally, the liquid enters the interior of the gun body 1. At this time, the liquid level in the bottle drops, causing the gas pressure inside the bottle to decrease. Outside gas enters the bottle through the vent 209, maintaining the gas pressure inside the bottle consistent with the outside pressure. Press the wrench again. Due to the high pressure inside the gun body 1, the lower valve assembly 3 deforms downward. The limiting groove 304 is blocked by the sealing column 204, and the liquid cannot be discharged from the limiting groove 304. At the same time, the liquid inside the gun body 1 is forced into the sealing groove 301, and the lower valve assembly 3 deforms downward, opening the valve. Figure 3 The opening at point a allows the liquid inside the sealing groove 301 to flow through the liquid outlet channel and finally be sprayed out through the water distribution sleeve and the cap. After the wrench is released, the plastic spring returns to its original shape and replenishes the liquid inside the gun body 1 again. This cycle can be repeated for normal use.

[0025] 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 valve structure for a spray gun, characterized in that: The spray gun includes a cap assembly (2) and a lower valve assembly (3) applied to the spray gun. The spray gun includes a gun body (1). The cap assembly (2) is snapped onto the bottom end of the gun body (1). The lower valve assembly (3) is movably disposed on the top end of the cap assembly (2). The cap assembly (2) includes a tray (201), a liquid suction port (206) is provided through the middle of the tray (201), and 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) is shaped like a frustum. The lower valve assembly (3) includes a sealing groove (301), a liquid storage tank (302) is provided at the bottom of the sealing groove (301), and the top of the liquid storage tank (302) is integrally formed with the bottom of the outer wall of the sealing groove (301). A limiting groove (304) is provided at the lower inner end of the sealing groove (301), and the bottom end of the limiting groove (304) extends to the upper inner end of the liquid storage tank (302). A reset point (305) is integrally formed around the outer wall of the limiting groove (304), and the outer side of the reset point (305) is integrally formed with the bottom end of the sealing groove (301).

2. The valve structure of a novel spray gun according to claim 1, characterized in that: The top edge of the tray (201) is integrally formed with a first extension cylinder (202) and a second extension cylinder (203), and the second extension cylinder (203) is located inside the first extension cylinder (202). Both sides of the top of the tray (201) are provided with ventilation ports (209), and the ventilation ports (209) are located on both sides of the bottom of the second extension cylinder (203).

3. The valve structure of a novel spray gun according to claim 2, characterized in that: An extension tube (205) is integrally formed at the bottom center of the tray (201), and the inner diameter of the extension tube (205) is the same as the diameter of the suction port (206).

4. The valve structure of a novel spray gun according to claim 3, characterized in that: The top center of the pallet (201) is provided with an annular limiting groove (208), and the annular limiting groove (208) is located inside the second extension cylinder (203). The sealing column (204) moves through the limiting groove (304). Both sides of the bottom of the outer wall of the pallet (201) are integrally formed with extension plates (207), and the extension plates (207) are arc-shaped.

5. The valve structure of a novel spray gun according to claim 4, characterized in that: The bottom end of the liquid storage tank (302) is integrally formed with a gasket (303), and the outer side of the gasket (303) extends outward. The gasket (303) is adapted to the annular limiting groove (208).

6. The valve structure of a novel spray gun according to claim 5, characterized in that: The gun body (1) has a large ring (4) at its bottom, and the large ring (4) is engaged between the gun body (1) and the cap assembly (2). The cap assembly (2) is located inside the large ring (4). The bottom of the large ring (4) has a suction tube (5), and the top of the suction tube (5) is inserted into the extension tube (205).

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