CN215141324U

CN215141324U - Spray gun with backflow prevention structure

Info

Publication number: CN215141324U
Application number: CN202120797056.XU
Authority: CN
Inventors: 王银江; 王海洋
Original assignee: Ningbo Jianghui Electrical Technology Co ltd
Current assignee: Ningbo Jianghui Electrical Technology Co ltd
Priority date: 2021-03-12
Filing date: 2021-04-19
Publication date: 2021-12-14
Anticipated expiration: 2031-04-19

Abstract

The utility model discloses a spray gun with a backflow prevention structure, which comprises a gun body (1) and a material pot (2), wherein the gun body (1) is provided with a material pot interface 103, and the material pot (2) is connected on the material pot interface 103; an air inlet pipe 104 is arranged in the material pot interface 103, and the inner cavity of the air inlet pipe 104 is communicated with the inner cavity of the material pot interface 103; an air outlet valve (3) is arranged at the air outlet end of the air inlet pipe 104, the air outlet valve (3) comprises a connector (301) and an elastic leather cup (302), the elastic leather cup (302) is connected with one end of the connector (301), the elastic leather cup (302) and the connector (301) are integrally formed, and a linear vent (303) is arranged at the lower end of the elastic leather cup (302); the other end of the joint (301) is connected with the air outlet end of the air inlet pipe 104. The backflow preventing structure of the spray gun has the advantages of good backflow preventing effect, simple structure and convenience in assembly.

Description

Spray gun with backflow prevention structure

Technical Field

The utility model relates to a spraying equipment technical field, more exactly relate to a spray gun of anti-backflow structure in area.

Background

The spray gun is a common spraying device, and the spray gun mainly atomizes the coating to obtain an attractive and uniform coating layer on the surface of a coated workpiece. The anti-backflow structure of the existing spray gun charging barrel is unreasonably arranged, under the abnormal use state, such as toppling and inversion, liquid materials in the spray gun charging barrel can flow out from the air inlet, and the liquid flows into other parts of the gun body to cause pollution if the liquid materials are light; the heavy current flows into the spray gun motor to influence the normal operation of the motor, and even accidents can occur. Therefore, the structure of the anti-backflow structure of the existing spray gun charging barrel is necessarily improved.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a spray gun of structure of preventing flowing backwards in area, the effect of preventing flowing backwards is better for the structure of preventing flowing backwards of this spray gun, and simple structure, and the equipment is convenient.

The technical solution of the utility model is to provide a spray gun with a backflow prevention structure, which comprises a gun body and a material pot, wherein the gun body is provided with a material pot interface, and the material pot is connected with the material pot interface; an air inlet pipe is arranged in the material pot connector, and the inner cavity of the air inlet pipe is communicated with the inner cavity of the material pot connector; the air outlet end of the air inlet pipe is provided with an air outlet valve, the air outlet valve comprises a joint and an elastic leather cup, the elastic leather cup is connected with one end of the joint and is integrally formed with the joint, and the lower end of the elastic leather cup is provided with a linear vent; the other end of the joint is connected with the air outlet end of the air inlet pipe.

After the structure above adopting, the utility model discloses a spray gun of backflow structure is prevented in area compares with prior art, has following advantage:

because the air outlet end of the air inlet pipe of the spray gun with the backflow prevention structure is provided with the air outlet valve, the air outlet valve comprises a joint and an elastic leather cup; after the spray gun is started, when the air collected in the gun body of the spray gun reaches a certain pressure, the linear vent at the lower end of the elastic leather cup is blown open, and the air enters the material pot interface to form a certain pressure in the material pot, so that the material in the material pot can be extruded out. After the spray gun stops working, the linear vent at the lower end of the elastic leather cup is closed, no air pressure is generated in the material pot interface, the material in the material pot cannot be extruded, and the backflow prevention effect is good.

As an improvement, the other end of the joint is sleeved outside the air outlet end of the air inlet pipe. After adopting this kind of structure, the joint equipment is more convenient.

As an improvement, the inner wall of the joint is provided with a first limiting step, and the first limiting step is used for limiting the air inlet pipe. After adopting this kind of structure, first spacing step has limiting displacement to the intake pipe, can avoid pegging graft when the equipment air outlet valve and cross the head.

As an improvement, the size of the inner diameter of the first limiting step of the joint is larger than that of the air outlet end of the air inlet pipe. After adopting this kind of structure, the installation of joint can not influence the gas flux of the intake pipe end of giving vent to anger for it is more smooth and easy to give vent to anger.

As an improvement, a second limiting step is arranged on the outer wall of the air outlet end of the air inlet pipe and used for limiting the other end of the joint. After the structure is adopted, the second limiting step limits the air outlet valve, and whether the air outlet valve is installed in place or not can be visually seen.

As an improvement, the air outlet valve is made of rubber materials. After adopting this kind of structure, the gas outlet valve elasticity is better.

Drawings

Fig. 1 is a schematic view of a cross-sectional structure of the spray gun with a backflow prevention structure of the present invention.

Fig. 2 is the three-dimensional structure diagram of the air outlet valve of the spray gun with the backflow prevention structure of the utility model.

Fig. 3 is a schematic view of the three-dimensional structure of another angle of the air outlet valve of the spray gun with the backflow prevention structure of the present invention.

Shown in the figure: 1. the gas feeding device comprises a gun body, 101, a gas channel, 102, a liquid channel, 103, a material pot interface, 104, an air inlet pipe, 105, a second limiting step, 2, a material pot, 3, an air outlet valve, 301, a connector, 302, an elastic leather cup, 303, a linear air vent, 304, a first limiting step, 4, a sealing cover, 5 and a material conveying pipe.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification.

In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "including," and/or "containing," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

As shown in fig. 1 to 3, the utility model discloses a spray gun with a backflow prevention structure, which comprises a gun body 1 and a material pot 2.

The gas channel 101 is arranged in the gun body 1, the material pot interface 103 is arranged on the gun body 1, the material pot interface 103 is connected with the material pot 2, and the material pot 2 is used for containing paint or other liquid, such as disinfectant water and the like. The material pot interface 103 is connected with the material pot 2 through threads. An air inlet pipe 104 is arranged in the material pot interface 103, and the inner cavity of the air inlet pipe 104 is communicated with the inner cavity of the material pot interface 103.

The air outlet end of the air inlet pipe 104 is provided with an air outlet valve 3, the air outlet end of the air inlet pipe 104 is provided with the air outlet valve 3 made of rubber materials, and the air outlet valve 3 comprises a joint 301 and an elastic leather cup 302. The elastic leather cup 302 is arranged at one end of the joint 301, the elastic leather cup 302 and the joint 301 are integrally formed, and a linear vent 303 is arranged at the lower end of the elastic leather cup 302. The other end of the joint 301 is sleeved outside the air outlet end of the air inlet pipe 104, a second limiting step 105 is arranged on the outer wall of the air outlet end of the air inlet pipe 104, and the second limiting step 105 is used for limiting the other end of the joint 301. The inner wall of the joint 301 is provided with a first limiting step 304, the first limiting step 304 is used for limiting the air inlet pipe 104, and the size of the inner diameter of the first limiting step 304 of the joint 301 is larger than that of the air outlet end of the air inlet pipe 104.

The upper end of the material pot 2 is provided with a sealing cover 4, the sealing cover 4 is used for sealing the opening end of the material pot 2, and the coating or other liquid in the material pot 2 is prevented from flowing out of the material pot 2. The sealing cover 4 is provided with an air inlet which is communicated with the inner cavity of the material pot interface 103. A material conveying pipe 5 is further arranged in the material pot 2, one end of the material conveying pipe 5 extends into the bottom of the material pot 2, and the other end of the material conveying pipe 5 penetrates through the middle through hole of the sealing cover 4 and then is communicated with the liquid channel 102 in the gun body 1.

After the spray gun is started, when the wind collecting in the spray gun body 1 reaches a certain pressure, the linear ventilation opening 303 at the lower end of the elastic leather cup 302 is blown open, the gas enters the material pot interface 103, then enters the material pot 2 through the air inlet on the sealing cover 4, a certain pressure is formed in the material pot 2, and the paint or the liquid in the material pot 2 is pressed out from the material pot 2. After the spray gun stops working and no air pressure is exerted, the linear ventilation opening 303 at the lower end of the elastic leather cup 302 is closed, the air pressure in the material pot 2 slowly disappears, the material in the material pot 2 cannot be pressed out, and the backflow prevention effect is good.

Claims

1. A spray gun with a backflow prevention structure comprises a gun body (1) and a material pot (2), wherein a material pot interface (103) is arranged on the gun body (1), and the material pot (2) is connected to the material pot interface (103); an air inlet pipe (104) is arranged in the material pot interface (103), and the inner cavity of the air inlet pipe (104) is communicated with the inner cavity of the material pot interface (103); the method is characterized in that: an air outlet valve (3) is arranged at the air outlet end of the air inlet pipe (104), the air outlet valve (3) comprises a connector (301) and an elastic leather cup (302), the elastic leather cup (302) is connected with one end of the connector (301), the elastic leather cup (302) and the connector (301) are integrally formed, and a linear vent (303) is arranged at the lower end of the elastic leather cup (302); the other end of the joint (301) is connected with the air outlet end of the air inlet pipe (104).

2. The spray gun with the backflow preventing structure as claimed in claim 1, wherein: the other end of the joint (301) is sleeved outside the air outlet end of the air inlet pipe (104).

3. The spray gun with the backflow preventing structure as claimed in claim 2, wherein: the inner wall of the joint (301) is provided with a first limiting step (304), and the first limiting step (304) is used for limiting the air inlet pipe (104).

4. The spray gun with the backflow preventing structure as claimed in claim 3, wherein: the size of the inner diameter of the first limiting step (304) of the joint (301) is larger than that of the inner diameter of the air outlet end of the air inlet pipe (104).

5. The spray gun with the backflow preventing structure as claimed in claim 3, wherein: and a second limiting step (105) is arranged on the outer wall of the air outlet end of the air inlet pipe (104), and the second limiting step (105) is used for limiting the other end of the joint (301).

6. The spray gun with the backflow preventing structure as claimed in claim 1, wherein: the air outlet valve (3) is made of rubber materials.