Leakage-proof structure of pneumatic diaphragm regulating valve

Abstract

The utility model discloses a leakproof structure of a pneumatic diaphragm regulating valve, which comprises a valve body structure, a valve body cover structure, a connecting frame structure, an actuating mechanism and a valve rod structure, the surface of the valve body structure is fixedly connected with the valve body cover structure, and the surface of the valve body cover structure is spirally connected with the connecting frame structure. The leakage-proof structure comprises a connecting frame structure, the surface of one end of the connecting frame structure is spirally connected with an executing mechanism, the inner surface of the executing mechanism is fixedly connected with a valve rod structure, and a sealing ring is fixedly embedded in the surface of the bottom end of the executing mechanism. The pneumatic membrane is clamped and pressed between the upper cavity and the lower cavity, the convex block and the groove are in butt joint and fixed, the valve body cover structure and the execution mechanism are in butt joint conveniently through the arrangement of the connecting frame structure, the valve body cover structure and the execution mechanism are in mutual spiral butt joint, and a sealing ring is arranged in the valve body cover structure and the execution mechanism.

Description

Technical Field

[0001] The utility model relates to the field of regulating valves, in particular to a leakage-proof structure of a pneumatic film regulating valve. Background Art

[0002] A pneumatic diaphragm control valve is a control device in pneumatic unit instrumentation and a key component in automated control systems for production processes. It receives output signals from control instruments to close and open the valve, achieving automatic regulation of parameters such as pressure, temperature, flow, and liquid level. It is widely used in the chemical, petroleum, metallurgy, electric power, and textile industries for automatic regulation and remote control. Existing pneumatic diaphragm control valves have poor sealing properties and are prone to leakage, making them inconvenient to use. Therefore, a leak-proof structure for a pneumatic diaphragm control valve has been proposed. Utility Model Content

[0003] The main purpose of the utility model is to provide a pneumatic diaphragm regulating valve anti-leakage structure, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A pneumatic diaphragm regulating valve leakage prevention structure includes a valve body structure, a valve body cover structure, a connecting frame structure, an actuator and a valve stem structure. The surface of the valve body structure is fixedly connected to the valve body cover structure, the surface of the valve body cover structure is spirally connected to the connecting frame structure, one end surface of the connecting frame structure is spirally connected to the actuator, the inner surface of the actuator is fixedly connected to the valve stem structure, and the bottom end surface of the actuator is fixedly embedded with a sealing ring.

[0006] Preferably, the valve body structure includes a mounting valve, a flow chamber, a docking seat, a connecting groove and a threaded hole, the surface of the mounting valve is fixedly provided with a flow chamber, the surface of the flow chamber is fixedly provided with a docking seat, the surface of the mounting valve is fixedly provided with a connecting groove, and the surface of the mounting valve is fixedly provided with a threaded hole.

[0007] Preferably, the valve body cover structure includes a cover body, a sliding cabin, a sealing filler block, a fixing hole, a through-hole, and a fixing groove. The bottom end surface of the cover body is fixedly provided with a sliding cabin, one end surface of the sliding cabin is fixedly provided with a sealing filler block, the surface of the cover body is fixedly provided with a fixing hole, the surface of the cover body is fixedly provided with a through-hole, and the top surface of the cover body is fixedly provided with a fixing groove.

[0008] Preferably, the connecting frame structure includes a connecting rod, a prompt strip, a threaded fixing cap, a protruding block and two through-holes. The inner surface of the connecting rod is fixedly provided with a prompt strip, one end surface of the connecting rod is fixedly connected to a threaded fixing cap, the inner surface of the threaded fixing cap is fixedly provided with a protruding block, and the surface of the threaded fixing cap is fixedly provided with two through-holes.

[0009] Preferably, the actuator includes an upper cavity, a lower cavity, a pneumatic membrane, a spring, a docking threaded head and an air hole. The bottom surface of the upper cavity is fixedly attached to the pneumatic membrane, the bottom surface of the pneumatic membrane is fixedly attached to the lower cavity, the bottom surface of the pneumatic membrane is fixedly connected to the spring, the other end of the spring is fixedly connected to the lower cavity, the bottom surface of the lower cavity is fixedly provided with a docking threaded head, and the top surface of the upper cavity is fixedly provided with an air hole.

[0010] Preferably, the valve stem structure includes a sliding rod, a valve core, an indicator mark, a retaining ring and a fixing ring, one end surface of the sliding rod is fixedly connected to the valve core, the other end surface of the sliding rod is spirally connected to the fixing ring, the surface of the sliding rod is fixedly provided with an indicator mark, and the surface of the sliding rod is fixedly provided with a retaining ring.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The utility model provides a leak-proof structure for a pneumatic diaphragm regulating valve, which improves the tightness of its interior by arranging an actuator to avoid leakage. The upper cavity and the lower cavity clamp the pneumatic diaphragm in the middle, and are fixed to each other by protrusions and grooves. The valve body cover structure and the actuator are conveniently docked by arranging a connecting frame structure, so that the docking connection is spirally docked with each other and a sealing ring is arranged inside to improve the sealing of the connection. The docking thread head is spirally docked with the threaded fixing cap, and the sealing ring is embedded in the fixing groove before docking. Then, after the spiral docking, the protrusion will squeeze and fix the sealing ring in the fixing groove, and the sealing filler block inside the valve body cover structure is used to improve the sealing when the sliding rod moves. The overall device strengthens the connection structure to improve its sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an overall schematic diagram of a leak-proof structure of a pneumatic diaphragm regulating valve according to the present invention;

[0014] Figure 2 This is a schematic diagram of the valve body structure of a pneumatic diaphragm regulating valve with a leak-proof structure according to the present invention;

[0015] Figure 3 This is a schematic diagram of the valve body cover structure of a pneumatic diaphragm regulating valve with a leak-proof structure according to the present invention;

[0016] Figure 4This is a schematic diagram of the connecting frame structure of a pneumatic diaphragm regulating valve leakage prevention structure of the utility model;

[0017] Figure 5 This is a schematic diagram of an actuator of a pneumatic diaphragm regulating valve leak-proof structure according to the present invention;

[0018] Figure 6 This is a schematic diagram of the valve stem structure of a pneumatic diaphragm regulating valve leak-proof structure of the utility model;

[0019] In the figure: 1. Valve body structure; 101. Mounting valve; 102. Flow chamber; 103. Docking seat; 104. Connecting groove; 105. Threaded hole; 2. Valve body cover structure; 201. Cover body; 202. Sliding chamber; 203. Sealing packing block; 204. Fixing hole; 205. Through-hole 1; 206. Fixing groove; 3. Connecting frame structure; 301. Connecting rod; 302. Prompt strip; 303. Threaded fixing cap; 304. Raised block; 305. Through-hole 2; 4. Actuator; 401. Upper cavity; 402. Lower cavity; 403. Pneumatic diaphragm; 404. Spring; 405. Docking threaded head; 406. Air hole; 5. Valve stem structure; 501. Sliding rod; 502. Valve core; 503. Indicator; 504. Retaining ring; 505. Retaining ring; 6. Sealing ring. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] like Figure 1-6 As shown, a pneumatic diaphragm regulating valve leakage prevention structure includes a valve body structure 1, a valve body cover structure 2, a connecting frame structure 3, an actuator 4 and a valve stem structure 5. The surface of the valve body structure 1 is fixedly connected to the valve body cover structure 2, the surface of the valve body cover structure 2 is spirally connected to the connecting frame structure 3, one end surface of the connecting frame structure 3 is spirally connected to the actuator 4, the inner surface of the actuator 4 is fixedly connected to the valve stem structure 5, and the bottom end surface of the actuator 4 is fixedly embedded with a sealing ring 6;

[0022] The valve body structure 1 includes a mounting valve 101, a flow chamber 102, a docking seat 103, a connecting groove 104 and a threaded hole 105. The surface of the mounting valve 101 is fixedly provided with a flow chamber 102, the surface of the flow chamber 102 is fixedly provided with a docking seat 103, the surface of the mounting valve 101 is fixedly provided with a connecting groove 104, and the surface of the mounting valve 101 is fixedly provided with a threaded hole 105; the valve body cover structure 2 includes a cover body 201, a sliding chamber 202, a sealing packing block 203, a fixing hole 204, a through hole 205, a fixing groove 206, and the cover body 201 is fixed with a flow chamber 102. The bottom surface is fixed with a sliding cabin 202, one end surface of the sliding cabin 202 is fixed with a sealing filler block 203, the surface of the cover body 201 is fixed with a fixing hole 204, the surface of the cover body 201 is fixed with a through hole 1 205, and the top surface of the cover body 201 is fixed with a fixing groove 206; the connecting frame structure 3 includes a connecting rod 301, a prompt strip 302, a threaded fixing cap 303, a protruding block 304 and a through hole 2 305, the inner surface of the connecting rod 301 is fixed with a prompt strip 302, and one end surface of the connecting rod 301 is fixed The screw cap 303 is connected, and the inner surface of the screw cap 303 is fixedly provided with a protrusion 304, and the surface of the screw cap 303 is fixedly provided with a second through-hole 305; the actuator 4 includes an upper cavity 401, a lower cavity 402, a pneumatic membrane 403, a spring 404, a butt thread head 405 and an air hole 406, the bottom end surface of the upper cavity 401 is fixedly attached to the pneumatic membrane 403, the bottom end surface of the pneumatic membrane 403 is fixedly attached to the lower cavity 402, the bottom end surface of the pneumatic membrane 403 is fixedly connected to the spring 404, and the other end of the spring 404 is fixedly attached to the bottom end surface of the pneumatic membrane 403. The end is fixedly connected to the lower cavity 402, the bottom end surface of the lower cavity 402 is fixedly provided with a docking threaded head 405, and the top end surface of the upper cavity 401 is fixedly provided with an air hole 406; the valve stem structure 5 includes a sliding rod 501, a valve core 502, an indicator mark 503, a retaining ring 504 and a fixing ring 505, one end surface of the sliding rod 501 is fixedly connected to the valve core 502, the other end surface of the sliding rod 501 is spirally connected to the fixing ring 505, the surface of the sliding rod 501 is fixedly provided with an indicator mark 503, and the surface of the sliding rod 501 is fixedly provided with a retaining ring 504.

[0023] It should be noted that the utility model is a leak-proof structure of a pneumatic diaphragm regulating valve, which can improve its internal tightness through the actuator 4 to avoid leakage. The upper cavity 401 and the lower cavity 402 clamp the pneumatic membrane 403 in the middle, and are fixed to each other by the protrusions and grooves. The valve body cover structure 2 and the actuator 4 are conveniently docked by setting a connecting frame structure 3, so that they are connected and spirally docked with each other and a sealing ring 6 is set inside to improve the sealing of the connection. The docking thread head 405 is spirally docked with the threaded fixing cap 303. Before docking, the sealing ring 6 is first embedded in the fixing groove 206. Then, after spiral docking, the protrusion block 304 will squeeze and fix the sealing ring 6 in the fixing groove 206, and the sealing filler block 203 inside the valve body cover structure 2 is used to improve the sealing of the sliding rod 501 when moving.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic diaphragm regulating valve leak-proof structure, characterized by: The invention comprises a valve body structure (1), a valve body cover structure (2), a connecting frame structure (3), an actuator (4) and a valve stem structure (5); the surface of the valve body structure (1) is fixedly connected to the valve body cover structure (2); the surface of the valve body cover structure (2) is spirally connected to the connecting frame structure (3); one end surface of the connecting frame structure (3) is spirally connected to the actuator (4); the inner surface of the actuator (4) is fixedly connected to the valve stem structure (5); and the bottom end surface of the actuator (4) is fixedly embedded with a sealing ring (6).

2. The anti-leakage structure of a pneumatic diaphragm regulating valve according to claim 1, characterized in that: The valve body structure (1) comprises a mounting valve (101), a flow chamber (102), a docking seat (103), a connection groove (104) and a threaded hole (105); the flow chamber (102) is fixedly provided on the surface of the mounting valve (101); the docking seat (103) is fixedly provided on the surface of the flow chamber (102); the connection groove (104) is fixedly provided on the surface of the mounting valve (101); and the threaded hole (105) is fixedly provided on the surface of the mounting valve (101).

3. The anti-leakage structure of a pneumatic diaphragm regulating valve according to claim 2, characterized in that: The valve body cover structure (2) comprises a cover body (201), a sliding chamber (202), a sealing filler block (203), a fixing hole (204), a through hole (205), and a fixing groove (206); the sliding chamber (202) is fixedly provided on the bottom surface of the cover body (201); the sealing filler block (203) is fixedly provided on one end surface of the sliding chamber (202); the fixing hole (204) is fixedly provided on the surface of the cover body (201); the through hole (205) is fixedly provided on the surface of the cover body (201); and the fixing groove (206) is fixedly provided on the top surface of the cover body (201).

4. The anti-leakage structure of a pneumatic diaphragm regulating valve according to claim 3, characterized in that: The connecting frame structure (3) comprises a connecting rod (301), a prompt strip (302), a threaded fixing cap (303), a protruding block (304) and a second through-hole (305), wherein the prompt strip (302) is fixedly provided on the inner surface of the connecting rod (301), the threaded fixing cap (303) is fixedly connected to one end surface of the connecting rod (301), the protruding block (304) is fixedly provided on the inner surface of the threaded fixing cap (303), and the second through-hole (305) is fixedly opened on the surface of the threaded fixing cap (303).

5. The anti-leakage structure of a pneumatic diaphragm regulating valve according to claim 4, characterized in that: The actuator (4) comprises an upper cavity (401), a lower cavity (402), a pneumatic membrane (403), a spring (404), a butt-jointed threaded head (405) and an air hole (406), wherein the bottom surface of the upper cavity (401) is fixedly bonded with the pneumatic membrane (403), the bottom surface of the pneumatic membrane (403) is fixedly bonded with the lower cavity (402), the bottom surface of the pneumatic membrane (403) is fixedly connected with the spring (404), the other end of the spring (404) is fixedly connected with the lower cavity (402), the bottom surface of the lower cavity (402) is fixedly provided with a butt-jointed threaded head (405), and the top surface of the upper cavity (401) is fixedly provided with an air hole (406).

6. The anti-leakage structure of a pneumatic diaphragm regulating valve according to claim 5, characterized in that: The valve stem structure (5) comprises a sliding rod (501), a valve core (502), an indicator mark (503), a retaining ring (504) and a fixing ring (505), wherein one end surface of the sliding rod (501) is fixedly connected to the valve core (502), and the other end surface of the sliding rod (501) is spirally connected to the fixing ring (505), the surface of the sliding rod (501) is fixedly provided with the indicator mark (503), and the surface of the sliding rod (501) is fixedly provided with the retaining ring (504).

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