Bellows gate valve for coal chemical industry

Abstract

This utility model relates to the field of bellows gate valve technology, particularly a bellows gate valve for coal chemical industry. It includes a bellows gate valve body, with a support block annularly located at the upper end of the body. A valve cover is fixedly connected to the upper surface of the support block via bolts. A lower valve stem is slidably connected to the center of the valve cover surface. An upper valve stem is rotatably connected to the upper surface of the valve cover via a rotating device. The lower valve stem is threaded into a threaded groove. An operating disc is located at the upper end of the upper valve stem. The lower valve stem is slidably connected to the inner wall of the valve cavity via a sliding device. A valve disc is connected to the lower end of the lower valve stem via a connecting device. This utility model prevents rotation when the valve disc is pressed against the inner wall of the valve cavity, avoiding rotational friction between the valve disc and the valve cavity, and preventing wear of the valve disc due to prolonged rotational friction. Furthermore, the connection point between the lower and upper valve stems of this bellows gate valve is outside the valve cavity, preventing corrosion from the fluid.

Description

Technical Field

[0001] This utility model relates to the field of bellows gate valve technology, and in particular to a bellows gate valve for coal chemical industry. Background Technology

[0002] Bellows gate valve, also known as bellows sealed gate valve, uses a bellows structure inside to prevent process fluid from corroding the valve stem. It is commonly used for transmitting media such as gas.

[0003] For example, the authorization announcement number "CN219588112U" is named a bellows stop valve that is easy to disassemble and assemble. By setting bolts at the connection between the upper and lower valve stems, the bellows can be quickly disassembled and assembled.

[0004] The above-mentioned and existing technologies have the following defects: When the valve stem assembly of the bellows gate valve descends, the valve disc rotates, which causes rotational friction between the valve disc and the valve cavity. Over time, this can easily lead to wear of the valve disc, resulting in poor sealing of the bellows gate valve. The bolt connection between the upper and lower valve stems of the bellows gate valve is located inside the valve cavity, which is easily corroded by the fluid, making it impossible to remove the bolts. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a bellows stop valve for coal chemical industry.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a bellows gate valve for coal chemical industry, including a bellows gate valve body with a valve cavity inside. A support block is annularly located at the upper end of the valve body. A valve cover is fixedly connected to the upper surface of the support block via bolts. A lower valve stem is slidably connected to the center of the valve cover. An upper valve stem is rotatably connected to the upper surface of the valve cover via a rotating device. A threaded groove is located at the lower end of the upper valve stem, and the lower valve stem is threadedly connected to the threaded groove. An operating disc is located at the upper end of the upper valve stem. The lower valve stem is slidably connected to the inner wall of the valve cavity via a sliding device. A first limiting block is fixedly connected to the surface of the lower valve stem. A bellows is sleeved on the outside of the lower valve stem. A second limiting block is threadedly connected to the lower end of the lower valve stem, and the bellows is positioned between the first and second limiting blocks. A valve disc is connected to the lower end of the lower valve stem via a connecting device, and the lower end of the valve disc abuts against the inner wall of the valve cavity.

[0008] Preferably, the rotating device includes a fixing ring disposed on the upper surface of the valve cover, the fixing ring being rotatably connected to the upper valve stem via a bearing.

[0009] Preferably, the sliding device includes two sliders disposed on the two sides of the lower valve stem, and the inner walls of the upper two sides of the valve cavity are provided with sliding grooves, and the two sliders extend into the corresponding sliding grooves and are slidably connected thereto.

[0010] Preferably, the connecting device includes a connecting block, which is fixedly connected to the upper surface of the valve disc. The upper surface of the connecting block is provided with a connecting groove, and the lower surface of the lower valve stem is provided with a protrusion, which is threadedly connected to the connecting groove.

[0011] Preferably, the control panel is threadedly connected to the upper surface of the upper valve stem via connecting bolts.

[0012] Preferably, the valve cover has a circumferential shielding edge on its circumferential surface.

[0013] The beneficial effects of the bellows gate valve for coal chemical industry proposed in this utility model are as follows: This bellows gate valve, through the threaded connection of the lower valve stem and the threaded groove on the lower surface of the upper valve stem, and the limiting effect of the sliding device, ensures that the lower valve stem can only move up and down, thus allowing the valve disc to move only up and down. When the valve disc is pressed against the inner wall of the valve cavity, it will not rotate, avoiding rotational friction between the valve disc and the valve cavity, preventing wear of the valve disc due to rotational friction over time, and ensuring a tight seal of this bellows gate valve. At the same time, the connection position of the lower and upper valve stems of this bellows gate valve is outside the valve cavity, preventing corrosion from the fluid. The lower valve stem can be easily disassembled by screwing on the upper valve stem. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0015] Figure 2 This is an enlarged view of position A of this utility model.

[0016] In the diagram: 1. Bellows gate valve body, 2. Valve chamber, 3. Support block, 4. Valve cover, 5. Bolt assembly, 6. Lower valve stem, 7. Upper valve stem, 8. Threaded groove, 9. Operating panel, 10. First limit block, 11. Bellows, 12. Second limit block, 13. Valve disc, 14. Fixing ring, 15. Bearing, 16. Sliding block, 17. Sliding groove, 18. Connecting block, 19. Connecting groove, 20. Protrusion, 21. Connecting bolt, 22. Covering edge. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figure 1-2A bellows gate valve for coal chemical industry includes a bellows gate valve body 1, a valve cavity 2 inside the bellows gate valve body 1, a support block 3 annularly provided at the upper end of the gate valve body 1, a valve cover 4 fixedly connected to the upper surface of the support block 3 by a bolt assembly 5, a lower valve stem 6 slidably connected to the middle of the surface of the valve cover 4, an upper valve stem 7 rotatably connected to the upper surface of the valve cover 4 by a rotating device, a threaded groove 8 provided at the lower end of the upper valve stem 7, the lower valve stem 6 being threadedly connected to the threaded groove 8, an operating disc 9 provided at the upper end of the upper valve stem 7, the lower valve stem 6 being slidably connected to the inner wall of the valve cavity 2 by a sliding device, a first limiting block 10 fixedly connected to the surface of the lower valve stem 6, a bellows 11 sleeved on the outside of the lower valve stem 6, a second limiting block 12 threadedly connected to the lower end of the lower valve stem 6, the bellows 11 being positioned between the first limiting block 10 and the second limiting block 12, and a valve disc 13 connected to the lower end of the lower valve stem 6 by a connecting device, the lower end of the valve disc 13 abutting against the inner wall of the valve cavity 2.

[0019] The rotating device includes a fixing ring 14 disposed on the upper surface of the valve cover 4, and the fixing ring 14 is rotatably connected to the upper valve stem 7 via a bearing 15.

[0020] The sliding device includes two sliders 16 disposed on both sides of the lower valve stem 6. Slide grooves 17 are formed on the inner walls of both sides of the upper part of the valve cavity 2. The two sliders 16 extend into their respective slide grooves 17 and are slidably connected to them. By sliding the two sliders 16 within their respective slide grooves 17, the lower valve stem 6 is limited, allowing it to move only up and down.

[0021] The connecting device includes a connecting block 18, which is fixedly connected to the upper surface of the valve disc 13. A connecting groove 19 is provided on the upper surface of the connecting block 18, and a protrusion 20 is provided on the lower surface of the lower valve stem 6. The protrusion 20 is threadedly connected to the connecting groove 19.

[0022] The control panel 9 is threaded to the upper surface of the upper valve stem 7 via connecting bolts 21. The control panel 9 can be quickly disassembled by tightening the connecting bolts 21.

[0023] The valve cover 4 has a circumferential shielding edge 22. The shielding edge 22 serves to cover the connection between the support block 3 and the valve cover 4, preventing dust from entering the connection area.

[0024] Working principle: By rotating the operating disc 9, the upper valve stem 7 rotates due to the rotatable connection between the fixed ring 14 and the upper valve stem 7 via the bearing 15. Then, through the threaded connection between the lower valve stem 6 and the threaded groove 8 on the lower surface of the upper valve stem 7, and the limiting action of the sliding device, the lower valve stem 6 moves up and down, causing the valve disc 13 to move up and down. When the valve disc 13 is pressed against the inner wall of the valve cavity 2, the shut-off valve is in the closed state; when the valve disc 13 disengages from the inner wall of the valve cavity 2, the shut-off valve is in the open state. Status; If you want to replace the bellows 11, unscrew the bolt assembly 5, then pull the operating plate 9 to remove the lower valve stem 6, the upper valve stem 7, the bellows 11, and the valve disc 13. Then, screw the operating plate 9 to rotate the upper valve stem 7, causing the lower valve stem 6 to disengage from the upper valve stem 7. Then, through the connecting device, screw the valve disc 13. Since the connecting groove 19 and the protrusion 20 are threadedly connected, the valve disc 13 can be screwed off. Then, screw the second limit block 12 off. Finally, the bellows 11 can be disassembled and replaced.

[0025] In summary, this bellows gate valve, through the threaded connection of the threaded groove 8 on the lower surface of the lower valve stem 6 and the upper valve stem 7, and the limiting effect of the sliding device, ensures that the lower valve stem 6 can only move up and down, thereby allowing the valve disc 13 to move up and down only. When the valve disc 13 is pressed against the inner wall of the valve cavity 2, it will not rotate, thus avoiding rotational friction between the valve disc 13 and the valve cavity 2. This prevents wear of the valve disc 13 due to rotational friction over time, ensuring a tight seal for this bellows gate valve. At the same time, the connection position of the lower valve stem 6 and the upper valve stem 7 is outside the valve cavity 2, and will not be corroded by the fluid. The lower valve stem 6 can be easily disassembled by screwing on the upper valve stem 7.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A corrugated pipe stop valve for coal chemical industry, comprising a corrugated pipe stop valve body (1), characterized in that, The bellows gate valve body (1) has a valve chamber (2) inside. A support block (3) is provided on the upper end of the gate valve body (1). A valve cover (4) is fixedly connected to the upper surface of the support block (3) by a bolt assembly (5). A lower valve stem (6) is slidably connected to the middle of the surface of the valve cover (4). An upper valve stem (7) is rotatably connected to the upper surface of the valve cover (4) by a rotating device. A threaded groove (8) is provided at the lower end of the upper valve stem (7). The lower valve stem (6) is threadedly connected to the threaded groove (8). An operating mechanism is provided at the upper end of the upper valve stem (7). The lower valve stem (6) is slidably connected to the inner wall of the valve cavity (2) through a sliding device. A first limiting block (10) is fixedly connected to the surface of the lower valve stem (6). A bellows (11) is sleeved on the outside of the lower valve stem (6). A second limiting block (12) is threadedly connected to the lower end of the lower valve stem (6). The bellows (11) is located between the first limiting block (10) and the second limiting block (12). A valve disc (13) is connected to the lower end of the lower valve stem (6) through a connecting device. The lower end of the valve disc (13) abuts against the inner wall of the valve cavity (2).

2. The corrugated pipe stop valve for coal chemical industry according to claim 1, characterized in that, The rotating device includes a fixing ring (14) disposed on the upper surface of the valve cover (4), and the fixing ring (14) is rotatably connected to the upper valve stem (7) through a bearing (15).

3. The corrugated pipe stop valve for coal chemical industry according to claim 1, characterized in that, The sliding device includes two sliders (16) disposed on both sides of the lower valve stem (6). The upper inner walls of the valve cavity (2) are provided with grooves (17). The two sliders (16) extend into the corresponding grooves (17) and slide in connection with them.

4. The corrugated pipe stop valve for coal chemical industry according to claim 1, characterized in that, The connecting device includes a connecting block (18), which is fixedly connected to the upper surface of the valve disc (13). A connecting groove (19) is provided on the upper surface of the connecting block (18), and a protrusion (20) is provided on the lower surface of the lower valve stem (6). The protrusion (20) is threadedly connected to the connecting groove (19).

5. The corrugated pipe stop valve for coal chemical industry according to claim 1, characterized in that, The operating panel (9) is threadedly connected to the upper surface of the upper valve stem (7) via connecting bolts (21).

6. The corrugated pipe stop valve for coal chemical industry according to claim 1, characterized in that, The valve cover (4) has a circumferential shielding edge (22) on its circumferential surface.

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