Electrostatic spray gun with valve element elastic adjustable sealing structure

Abstract

The utility model discloses an electrostatic spray gun with a sealing structure with an elastic and adjustable valve core, which relates to the technical field of spraying and comprises a valve body, a valve seat arranged in the valve body, a gun valve core, a shutoff guide valve and a sealing assembly arranged at the tail part of the shutoff guide valve, and the sealing assembly comprises a sealing plug arranged at the tail part of the shutoff guide valve. The gun valve element penetrates through the sealing plug and the shutoff guide valve, a fluid inlet is formed in one side of the shutoff guide valve, the front end of the shutoff guide valve abuts against the valve seat, and the gun valve element can be driven to move. The valve seat and the head of the gun valve element form a sealed valve port, the gun valve element can move in a small range in the axial direction, and when the gun valve element is controlled to move forwards to make the head of the gun valve element make close contact with the valve seat, the valve port is closed, and no fluid flows out; when the gun valve element is controlled to move backwards to enable the head of the gun valve element to be far away from the valve seat, the valve port is opened, fluid flows out of the valve body outlet, the sealing effect is better, and meanwhile damage to parts can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of spraying technology, specifically to an electrostatic spray gun with an adjustable valve core sealing structure. Background Technology

[0002] An electrostatic spray gun is primarily a coating tool used for painting workpiece surfaces, mainly for metals and other conductive materials. The electrostatic powder spray gun ejects dispersed powder coating particles from the nozzle. These particles acquire an electrostatic charge by passing through a corona field, which is formed by the radiation of an electrode needle that releases high-voltage static electricity through the nozzle. The charged powder coating particles adhere to the surface of the workpiece being coated; this spraying process is called electrostatic spraying. Currently, electrostatic spray guns typically use a sealing ring to achieve a seal. However, over long-term use, wear and tear on the sealing ring can lead to damage, affecting the sealing effect. This necessitates replacement of the sealing ring, which is cumbersome and reduces construction efficiency. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide an electrostatic spray gun with an adjustable sealing structure for the valve core.

[0004] The electrostatic spray gun with an adjustable valve core sealing structure provided by this utility model adopts the following technical solution:

[0005] An electrostatic spray gun with an adjustable valve core sealing structure includes a valve body, a valve seat disposed within the valve body, a gun valve core, a flow-stopping guide valve, and a sealing assembly disposed at the tail of the flow-stopping guide valve. The sealing assembly includes a sealing plug disposed at the tail of the flow-stopping guide valve. The gun valve core passes through the sealing plug and the flow-stopping guide valve. A fluid inlet is provided on one side of the flow-stopping guide valve. The front end of the flow-stopping guide valve abuts against the valve seat. The gun valve core can be driven to move.

[0006] Furthermore, the tail end of the flow-stopping pilot valve is provided with an adjustment assembly for pressing the sealing plug against the tail end of the flow-stopping pilot valve. The adjustment assembly includes a spring disposed at the tail end of the flow-stopping pilot valve, and the spring can be driven to compress and abut against the end of the sealing plug.

[0007] Furthermore, the adjustment assembly also includes an adjustment cap disposed at the tail of the flow-stopping guide valve. The adjustment cap is threaded onto the tail of the flow-stopping guide valve, the end of the spring abuts against the inner side of the adjustment cap, and the valve core passes through the adjustment cap.

[0008] Furthermore, the sealing assembly also includes a sealing ring that abuts against the end of the sealing plug, the end of the spring abuts against the sealing ring, and the valve core passing through the sealing ring.

[0009] Furthermore, the sealing plug is shaped like a shuttle, and the tail of the flow-stopping guide valve is shaped like a cone that matches the shape of the sealing plug.

[0010] Furthermore, the front end of the flow-stopping guide valve is threaded into the valve body and abuts against the valve seat.

[0011] In summary, this utility model has at least one of the following beneficial effects: the valve seat and the head of the gun valve core form a sealed valve port, and the gun valve core can move within a small range along the axial direction. When the gun valve core is controlled to move forward so that the head of the gun valve core is in close contact with the valve seat, the valve port is closed and no fluid flows out; when the gun valve core is controlled to move backward so that the head of the gun valve core is away from the valve seat, the valve port is opened and the fluid flows out from the valve body outlet, resulting in a better sealing effect and reducing damage to components. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0013] Explanation of reference numerals in the attached figures:

[0014] 1. Valve body; 2. Valve seat; 3. Valve core; 4. Flow control guide valve; 5. Sealing assembly; 51. Sealing plug; 52. Sealing ring; 6. Adjusting assembly; 61. Spring; 62. Adjusting cap. Detailed Implementation

[0015] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0016] The following is in conjunction with the appendix Figure 1 The present invention will be described in further detail below.

[0017] This utility model discloses an electrostatic spray gun with an adjustable valve core sealing structure. (Refer to...) Figure 1An electrostatic spray gun with an adjustable valve core sealing structure includes a valve body 1, a valve seat 2 disposed within the valve body 1, a gun valve core 3, a flow-stopping guide valve 4, and a sealing assembly 5 disposed at the tail of the flow-stopping guide valve 4. The sealing assembly 5 includes a sealing plug 51 disposed at the tail of the flow-stopping guide valve 4. The gun valve core 3 passes through the sealing plug 51 and the flow-stopping guide valve 4. A fluid inlet is provided on one side of the flow-stopping guide valve 4. The front end of the flow-stopping guide valve 4 abuts against the valve seat 2. The gun valve core 3 can be driven to move. The valve seat 2... The valve core 3 and the head of the valve core 3 form a sealing valve port. The valve core 3 can move a small range along the axis. When the valve core 3 is moved forward so that the head of the valve core 3 is in close contact with the valve seat 2, the valve port is closed and no fluid flows out. When the valve core 3 is moved backward so that the head of the valve core 3 is away from the valve seat 2, the valve port is opened and the fluid flows out from the valve body outlet. The sealing effect is better and the damage to the parts can be reduced. The sealing plug 51 can seal the tail of the throttling guide valve 4 to prevent fluid from leaking from the tail of the throttling guide valve 4.

[0018] In this embodiment, the tail end of the flow-stopping pilot valve 4 is provided with an adjustment component 6 for pressing the sealing plug 51 against the tail end of the flow-stopping pilot valve 4. The adjustment component 6 includes a spring 61 disposed at the tail end of the flow-stopping pilot valve 4. The spring 61 can be driven to compress and abut against the end of the sealing plug 51. By compressing the spring 61, the sealing plug 51 can be pressed against the tail end of the flow-stopping pilot valve 4, which can better seal the tail end of the flow-stopping pilot valve 4 and complete the elastic seal of the fluid channel at the tail end of the flow-stopping pilot valve 4.

[0019] In this embodiment, the adjusting assembly 6 further includes an adjusting cap 62 disposed at the tail of the flow-stopping guide valve 4. The adjusting cap 62 is threaded onto the tail of the flow-stopping guide valve 4. The end of the spring 61 abuts against the inner side of the adjusting cap 62. The valve core 3 passes through the adjusting cap 62. By rotating the adjusting cap 62, the spring 61 is compressed. The spring 61 can press the sealing plug 51 tightly against the tail of the flow-stopping guide valve 4. By rotating the adjusting cap 62, the compression stroke of the spring 61 is adjusted, thereby adjusting the clamping force of the sealing plug 51.

[0020] In this embodiment, the sealing assembly 5 further includes a sealing ring 52 that abuts against the end of the sealing plug 51, the end of the spring 61 abuts against the sealing ring 52, and the gun valve core 3 passes through the sealing ring 52. The cooperation between the sealing ring 52 and the sealing plug 51 can more effectively seal the tail of the flow-stopping guide valve 4.

[0021] In this embodiment, the sealing plug 51 is shaped like a shuttle, and the tail of the flow-stopping guide valve 4 is shaped like a cone that matches the shape of the sealing plug 51. The shuttle-shaped sealing plug 51 can be better inserted into the cone-shaped tail of the flow-stopping guide valve 4, thus better sealing the tail of the flow-stopping guide valve 4.

[0022] In this embodiment, the front end of the flow-stopping guide valve 4 is threaded into the valve body 1 and abuts against the valve seat 2. By tightening the thread, the head of the flow-stopping guide valve 4 presses against the valve seat 2, so that the high-pressure fluid can only flow out through the inner hole of the valve seat 2 and the inner hole of the valve body 1.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An electrostatic spray gun with an adjustable valve core sealing structure, characterized in that: The device includes a valve body (1), a valve seat (2) disposed within the valve body (1), a gun valve core (3), a flow-stopping guide valve (4), and a sealing assembly (5) disposed at the tail of the flow-stopping guide valve (4). The sealing assembly (5) includes a sealing plug (51) disposed at the tail of the flow-stopping guide valve (4). The gun valve core (3) passes through the sealing plug (51) and the flow-stopping guide valve (4). A fluid inlet is provided on one side of the flow-stopping guide valve (4). The front end of the flow-stopping guide valve (4) abuts against the valve seat (2). The gun valve core (3) can be driven to move.

2. The electrostatic spray gun with an adjustable valve core sealing structure according to claim 1, characterized in that: The tail end of the throttling guide valve (4) is provided with an adjustment assembly (6) for pressing the sealing plug (51) against the tail end of the throttling guide valve (4). The adjustment assembly (6) includes a spring (61) provided at the tail end of the throttling guide valve (4). The spring (61) can be driven to compress and abut against the end of the sealing plug (51).

3. The electrostatic spray gun with an adjustable valve core sealing structure according to claim 2, characterized in that: The regulating assembly (6) also includes a regulating cap (62) disposed at the tail of the throttling guide valve (4). The regulating cap (62) is threaded onto the tail of the throttling guide valve (4). The end of the spring (61) abuts against the inner side of the regulating cap (62). The valve core (3) passes through the regulating cap (62).

4. The electrostatic spray gun with an adjustable valve core sealing structure according to claim 2, characterized in that: The sealing assembly (5) also includes a sealing ring (52) that abuts against the end of the sealing plug (51), the end of the spring (61) abuts against the sealing ring (52), and the gun valve core (3) passes through the sealing ring (52).

5. The electrostatic spray gun with an adjustable valve core sealing structure according to claim 1, characterized in that: The sealing plug (51) is shaped like a shuttle, and the tail of the flow-stopping guide valve (4) is shaped like a cone that matches the shape of the sealing plug (51).

6. The electrostatic spray gun with an adjustable valve core sealing structure according to claim 1, characterized in that: The front end of the flow-stopping guide valve (4) is threaded into the valve body (1) and abuts against the valve seat (2).

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