Pneumatic lining plastic butterfly valve

Abstract

The pneumatic lining plastic butterfly valve comprises a valve body and a pneumatic device, a valve is installed in the middle of the valve body, a plurality of sleeves are fixedly connected to the outer side of the valve body in an annular shape, sliding rods are fixedly connected to the inner walls of the sleeves, sliding blocks are connected to the outer portions of the sliding rods in a sliding mode, and the pneumatic device is arranged on the valve body. A connecting plate is fixedly connected between every two connected sliding blocks, two push rods are fixedly connected to the side wall of each connecting plate, a limiting plate is fixedly connected to one ends of every two connected push rods, a positioning rod is fixedly connected to the side wall of each limiting plate, and one end of each positioning rod penetrates through the side wall of the valve and extends into the valve. By means of the structure, the positioning rod can position the valve by adjusting the position of the positioning rod, the sealing performance of the connecting position of the valve and the valve body can be guaranteed, and leakage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic plastic-lined butterfly valve technology, specifically a pneumatic plastic-lined butterfly valve. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. A butterfly valve refers to a valve where the closing element (valve disc or butterfly plate) is a disk that rotates around the valve shaft to achieve opening and closing. Plastic-lined butterfly valves use ordinary carbon steel as a base, lined with a chemically superior thermoplastic material, formed through cold drawing or blow molding. They possess both the mechanical properties of steel and the corrosion resistance of plastic, and are characterized by slow scaling and resistance to microbial growth, making them ideal for conveying media such as acids, alkalis, salts, and corrosive gases. Pneumatic butterfly valves are controlled by an actuation mechanism to open and close the valve.

[0003] Currently, existing pneumatic plastic-lined butterfly valves open by compressing working gas during operation. However, after closing, the valve only relies on its own strength to support the pressure inside the pipeline. Under prolonged use, the valve is prone to damage, and its strength is easily affected, leading to material leakage and thus affecting its performance. Utility Model Content

[0004] The purpose of this utility model is to provide a pneumatic plastic-lined butterfly valve to solve the problem of limited valve strength and easy leakage of existing butterfly valves.

[0005] To achieve the above objectives, a pneumatically operated plastic-lined butterfly valve is provided, comprising: a valve body and a pneumatic device. A valve is installed in the middle of the valve body. Multiple sleeves are fixedly connected in a ring shape to the outer side of the valve body. Each sleeve has a slide rod fixedly connected to its inner wall. A slider is slidably connected to the outside of the slide rod. A connecting plate is fixedly connected between two connected sliders. Two push rods are fixedly connected to the side wall of the connecting plate. A limit plate is fixedly connected to one end of the two connected push rods. A positioning rod is fixedly connected to the side wall of the limit plate. One end of the positioning rod extends through the side wall of the valve and into the interior. By adjusting the position of the positioning rod, the positioning rod can position the valve, ensuring the sealing at the connection between the valve and the valve body and preventing leakage.

[0006] According to the pneumatic plastic-lined butterfly valve, a fixed sleeve is fixedly connected inside each of the multiple sleeves, and a threaded rod is threadedly connected to the middle of the multiple fixed sleeves. One end of the threaded rod is rotatably connected to the side wall of the connecting plate, and the other end is fixedly connected to a knob. The positioning rod is moved by pushing the threaded rod during the rotation.

[0007] According to the aforementioned pneumatic plastic-lined butterfly valve, the valve sidewall is fixedly connected with multiple fixed blocks at intervals, and a rotating rod is fixedly connected to the middle of each fixed block, with the upper end of the rotating rod extending through the valve body sidewall to the outside.

[0008] According to the aforementioned pneumatic plastic-lined butterfly valve, the upper end of the rotating rod is connected to a pneumatic device, the side wall of the pneumatic device is connected to an air inlet, and one end of the pneumatic device is connected to an air outlet.

[0009] According to the aforementioned pneumatic plastic-lined butterfly valve, a support rod is fixedly connected to the side wall of the pneumatic device, and one end of the support rod is fixedly connected to the outside of the valve body.

[0010] According to the aforementioned pneumatic plastic-lined butterfly valve, the two ends of the limiting plate are slidably connected to the outside of the slide rod, and the outside of the fixing sleeve is fixedly connected to the inside of the sleeve.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] This invention utilizes a threaded rod, a fixed sleeve, a push rod, a limiting plate, and a positioning rod in cooperation. During rotation, the threaded rod pushes the limiting plate to move, thereby adjusting the position of the positioning rod and extending it into the interior of the valve. This positions the connection between the valve and the valve body, improving the valve's strength and ensuring that the connection between the butterfly valve and the valve body remains unaffected during prolonged use, thus guaranteeing the butterfly valve's sealing performance.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a front view of a pneumatically lined butterfly valve according to the present invention;

[0016] Figure 2 This is a rear view of a pneumatic plastic-lined butterfly valve according to the present invention.

[0017] Figure 3 This is a cross-sectional view of the sleeve of a pneumatic plastic-lined butterfly valve according to this utility model;

[0018] Figure 4 For this utility model Figure 3 Enlarged view of point A in the middle.

[0019] In the diagram: 1. Valve body; 2. Valve; 3. Pneumatic device; 4. Air inlet; 5. Knob; 6. Sleeve; 7. Fixing block; 8. Rotating rod; 9. Air outlet; 10. Threaded rod; 11. Fixing sleeve; 12. Slide rod; 13. Limiting plate; 14. Push rod; 15. Positioning rod; 16. Slider. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This utility model provides a technical solution: a pneumatically lined butterfly valve, comprising: a valve body 1 and a pneumatic device 3. A valve 2 is installed in the middle of the valve body 1. Multiple sleeves 6 are fixedly connected in a ring shape on the outer side of the valve body 1. Each sleeve 6 has a slide rod 12 fixedly connected to its inner wall. The slide rod 12 cooperates with a slider 16 to move a positioning rod 15 within the sleeve 6, thereby positioning the valve 2. A slider 16 is slidably connected to the outside of the slide rod 12. A connecting plate is fixedly connected between two connected sliders 16. Two push rods 14 are fixedly connected to the side wall of the connecting plate. During rotation, the threaded rod 10 pushes the connecting plate to move, thereby pushing the positioning rod 15 to move. A limit plate 13 is fixedly connected to one end of the two connected push rods 14. A positioning rod 15 is fixedly connected to the side wall of the limit plate 13. One end of the positioning rod 15 extends through the side wall of the valve 2 to the inside, which can position the valve 2, keep the valve 2 stable, and prevent loosening.

[0022] Multiple sleeves 6 are each fixedly connected to a fixed sleeve 11. The middle of the multiple fixed sleeves 11 is threadedly connected to a threaded rod 10, which can adjust the position of the positioning rod 15 during rotation. One end of the threaded rod 10 is rotatably connected to the side wall of the connecting plate, and the other end is fixedly connected to a knob 5. Multiple fixed blocks 7 are fixedly connected at intervals to the side wall of the valve 2. A rotating rod 8 is fixedly connected to the middle of the fixed block 7. The pneumatic device 3 cooperates with the rotating rod 8 to control the rotation of the valve 2. The upper end of the rotating rod 8 extends through the side wall of the valve body 1 to the outside. The upper end of the rotating rod 8 is connected to the pneumatic device 3. The side wall of the pneumatic device 3 is connected to an air inlet 4. One end of the pneumatic device 3 is connected to an air outlet 9. A support rod is fixedly connected to the side wall of the pneumatic device 3. One end of the support rod is fixedly connected to the outside of the valve body 1. The two ends of the limiting plate 13 are slidably connected to the outside of the slide rod 12. The outside of the fixed sleeve 11 is fixedly connected to the inside of the sleeve 6.

[0023] Working principle: When in use, the butterfly valve is installed. After installation, the pneumatic device 3 is used to control the valve 2. After the valve 2 is closed, the knob 5 is used to drive the threaded rod 10 to rotate. During the rotation, the threaded rod 10 pushes the connecting plate to move. The push rod 14 pushes the limit plate 13 to move, so that the positioning rod 15 moves into the inside of the valve 2, thereby positioning the valve 2 and keeping the valve 2 stable. This ensures that the connection between the butterfly valve 2 and the valve body 1 maintains good sealing and prevents leakage.

[0024] When opening valve 2, rotate knob 5 in the opposite direction to move positioning rod 15 into sleeve 6. The end face of the front end of positioning rod 15 coincides with the inside of valve body 1. Since one end of sleeve 6 is fixedly connected to the outside of valve body 1, positioning rod 15 will not fall after moving into sleeve 6, and material will not enter the inside of sleeve 6 when passing through valve body 1, thus enabling valve 2 to rotate normally without obstruction by positioning rod 15.

[0025] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A pneumatically operated plastic-lined butterfly valve, comprising: The valve body (1) and the pneumatic device (3) are characterized in that a valve (2) is installed in the middle of the valve body (1), and a plurality of sleeves (6) are fixedly connected in an annular shape on the outer side of the valve body (1). A slide rod (12) is fixedly connected to the inner wall of each of the plurality of sleeves (6). A slider (16) is slidably connected to the outside of the slide rod (12). A connecting plate is fixedly connected between two connected sliders (16). Two push rods (14) are fixedly connected to the side wall of the connecting plate. A limit plate (13) is fixedly connected to one end of the two connected push rods (14). A positioning rod (15) is fixedly connected to the side wall of the limit plate (13). One end of the positioning rod (15) extends through the side wall of the valve (2) into the interior.

2. The pneumatic plastic-lined butterfly valve as described in claim 1, characterized in that: Each of the multiple sleeves (6) has a fixed sleeve (11) fixedly connected inside. A threaded rod (10) is threadedly connected to the middle of the multiple fixed sleeves (11). One end of the threaded rod (10) is rotatably connected to the side wall of the connecting plate, and the other end is fixedly connected to a knob (5).

3. A pneumatic plastic-lined butterfly valve as described in claim 1, characterized in that: The valve (2) has multiple fixed blocks (7) fixedly connected at intervals on its side wall. A rotating rod (8) is fixedly connected in the middle of the fixed block (7). The upper end of the rotating rod (8) extends through the side wall of the valve body (1) to the outside.

4. A pneumatic plastic-lined butterfly valve as described in claim 3, characterized in that: The upper end of the rotating rod (8) is connected to a pneumatic device (3), the side wall of the pneumatic device (3) is connected to an air inlet (4), and one end of the pneumatic device (3) is connected to an air outlet (9).

5. A pneumatic plastic-lined butterfly valve as described in claim 4, characterized in that: The pneumatic device (3) has a support rod fixedly connected to its side wall, and one end of the support rod is fixedly connected to the outside of the valve body (1).

6. A pneumatic plastic-lined butterfly valve as described in claim 2, characterized in that: The two ends of the limiting plate (13) are slidably connected to the outside of the slide rod (12), and the outside of the fixing sleeve (11) is fixedly connected to the inside of the sleeve (6).

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