Double-channel needle valve

Abstract

The utility model relates to the field of valves, in particular to a double-channel needle valve. The needle valve comprises a rotary needle valve base, valve bodies, a valve needle, a piston, a valve bonnet and a spring, a feeding runner and two discharging holes are formed in the rotary needle valve base, the feeding runner is located between the two discharging holes, the feeding runner is communicated with the two discharging holes, the valve bodies are fixedly connected to the two opposite ends of the rotary needle valve base, the valve bonnet is fixedly connected to the valve bodies, and the valve bonnet is fixedly connected to the piston. A valve needle is connected in the valve body in a sliding fit mode, a piston and a plug are arranged at the two ends of the valve needle respectively, an air inlet is formed in the valve body, and a spring is arranged between the piston and the valve bonnet. The two ends of the rotary needle valve base are connected with the two valve bodies, so that fluid selectively flows between the two channels. Through cooperation of the valve needle, the piston and the spring, a certain valve body is selected to be communicated with the feeding runner in the rotary needle valve base. The structure is simplified, and the stability of fluid conversion is improved.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a double-channel needle valve. Background Art

[0002] The hexagonal needle valve is a kind of on-off valve system used for color change and cleaning. It is usually used in conjunction with other color change components (such as paint pipeline interface, compressed air interface, regulating valve, reducer, etc.) when the pipeline or equipment spraying requires color change / precise flow control, and the solenoid valve response control is used to play its role.

[0003] However, the fluid conversion supply in the existing hexagonal needle valve pipeline is unstable, resulting in poor quality of automatic spray color change. In addition, the structure is complex and the cost is high. Utility Model Content

[0004] The technical problem to be solved by this utility model is as follows: To address the technical problems described in the background technology, this utility model provides a dual-channel needle valve. By connecting two valve bodies at both ends of the needle valve base, fluid can selectively flow between the two channels. The valve needle, piston, and spring cooperate to select which valve body is connected to the feed channel within the needle valve base. This application simplifies the structure and improves the stability of fluid conversion.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A dual-channel needle valve includes a rotary needle valve base, a valve body, a valve needle, a piston, a valve bonnet, and a spring. A feed channel and two discharge holes are provided in the rotary needle valve base. The feed channel is located between the two discharge holes and is communicated with the two discharge holes. The opposite ends of the rotary needle valve base are fixedly connected to the valve body, the valve bonnet is fixedly connected to the valve body, the valve needle is slidably connected in the valve body, a piston and a plug are respectively provided at both ends of the valve needle, an air inlet is provided in the valve body, and a spring is provided between the piston and the valve bonnet.

[0007] Specifically, the base of the rotary needle valve is internally threaded with a valve bowl, a tapered hole is provided in the valve bowl, the tapered hole is connected to the feed channel, and the valve bowl is located between the feed channel and the discharge hole.

[0008] Specifically, a positioning block is threadedly connected in the valve body, a through hole for matching with the valve needle is provided in the positioning block, and the valve needle passes through the through hole of the positioning block.

[0009] Specifically, the valve cap is threadedly connected to the top opening of the valve body.

[0010] Specifically, a sealing ring 1 for sealing the valve body is provided on the piston.

[0011] Specifically, a second sealing ring is provided between the valve bowl and the base of the rotary needle valve.

[0012] Specifically, the rotary needle valve base is threadedly connected to the valve body.

[0013] Specifically, an air inlet is provided at the end of the valve cap.

[0014] The beneficial effects of the present invention are as follows: It provides a dual-channel needle valve. By connecting two valve bodies at both ends of the needle valve base, fluid selectively flows between the two channels. The valve needle, piston, and spring cooperate to select which valve body is connected to the feed channel within the needle valve base. This application simplifies the structure and improves the stability of fluid conversion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 It is a cross-sectional view of the utility model;

[0017] Figure 2 It is an exploded view of the utility model;

[0018] In the figure, 1. Rotary needle valve base, 2. Valve body, 3. Valve needle, 4. Piston, 5. Valve cap, 6. Spring, 7. Inlet

[0019] Material flow channel, 8. Discharge hole, 9. Plug, 10. Air inlet, 11. Valve bowl, 12. Positioning block, 13. Sealing ring 1, 14. Sealing ring 2, 15. Air inlet. DETAILED DESCRIPTION

[0020] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0021] Figure 1 It is a cross-sectional view of the utility model; Figure 2 It is an exploded view of the present utility model.

[0022] Combined with attachment Figure 1 and attached Figure 2 As shown, a dual-channel needle valve includes a rotary needle valve base 1, a valve body 2, a valve needle 3, a piston 4, a valve cap 5, and a spring 6. A feed channel 7 and two discharge holes 8 are provided in the rotary needle valve base 1. The feed channel 7 is located between the two discharge holes 8, and the feed channel 7 is communicated with the two discharge holes 8. The opposite ends of the rotary needle valve base 1 are fixedly connected to the valve body 2, and the valve cap 5 is fixedly connected to the valve body 2. The valve needle 3 is slidably connected in the valve body 2, and a piston 4 and a plug 9 are respectively provided at both ends of the valve needle 3. An air inlet hole 10 is provided in the valve body 2, and a spring 6 is provided between the piston 4 and the valve cap 5.

[0023] The needle valve base 1 is internally threaded with a valve bowl 11 , which has a tapered hole in it. The tapered hole is connected to the feed channel 7 , and the valve bowl 11 is located between the feed channel 7 and the discharge hole 8 .

[0024] The valve body 2 is internally threaded with a positioning block 12, which has a through hole for fitting the valve needle 3. The valve needle 3 passes through the through hole of the positioning block 12. The valve needle 3 moves back and forth in a straight line along the through hole of the positioning block 12, which can ensure the stability of the movement of the valve needle 3.

[0025] The valve cap 5 is threadedly connected to the top opening of the valve body 2. The inner wall of the valve cap 5 is provided with a thread, and the outer wall of the top opening of the valve body 2 is provided with a thread, which can realize the rapid disassembly and assembly of the valve cap 5 and the valve body 2.

[0026] The piston 4 is provided with a sealing ring 13 for sealing the valve body 2. The sealing ring 13 can improve the sealing and waterproof performance between the piston 4 and the sealing valve body 2.

[0027] A second sealing ring 14 is provided between the valve bowl 11 and the rotary needle valve base 1. The second sealing ring 14 can improve the sealing and waterproof performance between the valve bowl 11 and the rotary needle valve base 1.

[0028] The needle valve base 1 is threadedly connected to the valve body 2. The inner wall of the mounting groove of the needle valve base 1 is provided with a thread, and the outer wall of the valve body 2 is provided with a thread. The needle valve base 1 and the valve body 2 can be quickly disassembled and assembled through the thread.

[0029] The end of the valve cap 5 is provided with an air inlet 15. The air inlet 15 is connected to the air valve 1.

[0030] The working method of the present application is as follows: the two air inlet holes 10 are respectively connected to the two air valves. In the initial state, both air valves are in the closed state. The spring 6 applies pressure to the piston 4 and the valve needle 3, so that the plug 9 of the valve needle 3 blocks the valve bowl 11. The air valve 1 sends gas into the valve cap 5 through the air inlet 15. The air pressure can be used to block the valve bowl 11, so that the channels on both sides of the feed channel 7 are in the closed state. When one of the air valves is opened, gas enters the valve body 2, and the air valve 1 stops supplying air to the air inlet 15. The air pressure pushes the piston 4 toward the adjacent valve cap 5. At this time, the spring 6 is in a compressed state, and the plug 9 is separated from the valve bowl 11. At this time, the fluid enters the feed channel 7, and then enters the corresponding valve body 2 from the open valve bowl 11, and flows out from the outlet hole 8 of the valve body 2.

[0031] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A dual-channel needle valve, characterized in that: The invention comprises a rotary needle valve base (1), a valve body (2), a valve needle (3), a piston (4), a valve cap (5), and a spring (6). A feed channel (7) and two discharge holes (8) are provided in the rotary needle valve base (1). The feed channel (7) is located between the two discharge holes (8). The feed channel (7) is communicated with the two discharge holes (8). The two opposite ends of the rotary needle valve base (1) are fixedly connected to the valve body (2). The valve cap (5) is fixedly connected to the valve body (2). The valve needle (3) is slidably connected in the valve body (2). The two ends of the valve needle (3) are respectively provided with a piston (4) and a plug (9). The valve body (2) is provided with an air inlet hole (10). A spring (6) is provided between the piston (4) and the valve cap (5).

2. The dual-channel needle valve according to claim 1, characterized in that: The needle valve base (1) is internally threadedly connected to a valve bowl (11), wherein a tapered channel is provided in the valve bowl (11), and the tapered channel is connected to the feed channel (7). The valve bowl (11) is located between the feed channel (7) and the discharge hole (8).

3. The dual-channel needle valve according to claim 1, characterized in that: The valve body (2) is internally threadedly connected to a positioning block (12), and a through hole for matching the valve needle (3) is provided in the positioning block (12), and the valve needle (3) passes through the through hole of the positioning block (12).

4. The dual-channel needle valve according to claim 1, characterized in that: The valve cap (5) is threadedly connected to the top opening of the valve body (2).

5. The dual-channel needle valve according to claim 2, characterized in that: The piston (4) is provided with a sealing ring (13) for sealing the valve body (2).

6. The dual-channel needle valve according to claim 2, characterized in that: A second sealing ring (14) is provided between the valve bowl (11) and the rotary needle valve base (1).

7. The dual-channel needle valve according to claim 1, characterized in that: The rotary needle valve base (1) and the valve body (2) are threadedly connected together.

8. The dual-channel needle valve according to claim 1, characterized in that: An air inlet (15) is provided at the end of the valve cap (5).

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