Novel double-seal forged steel stop valve

Abstract

The utility model relates to the technical field of stop valves, and discloses a novel double-seal forged steel stop valve which comprises a valve body, the two sides of the valve body are fixedly connected with mounting valve plates, and the top end of the valve body is fixedly connected with a first connecting pipe through a bolt. A worker presses a limiting column, at the moment, the worker can pull a limiting block downwards, the limiting block drives a sliding column to slide in an inner cavity of a hollowed-out block, the worker can rotate a rotating disc along with the inner diameter of the limiting block gradually getting away from the surface of a limiting rod, and a threaded rod drives a valve rod to move upwards through threaded connection; the valve rod drives the first valve clack and the second valve clack to move, at the moment, the hole diameter of an inner cavity of the valve body is not blocked by the first valve clack, the inner cavity of the valve body is in a circulation state, and along with gradual upward movement of the valve rod, the valve rod drives the bottom end of the second valve clack and the hole diameter of the inner cavity of the valve body to conduct blocking sealing, so that the valve body has the dual-sealing effect; and leakage accidents are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a novel double-sealed forged steel stop valve. Background Art

[0002] The stop valve, also known as the gate valve, is a forced sealing valve. Therefore, when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to prevent leakage. When the medium enters the valve from under the valve disc, the resistance that the operating force needs to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem must be large, otherwise the valve stem will bend.

[0003] A Chinese patent discloses a forged steel stop valve (authorization announcement number CN211852821U). The patented forged steel stop valve, when tightening the nut on the outer surface of the screw, presses the pressing piece downward through the connecting cover, and squeezes the packing and the gland arranged between the two packings through the pressing piece, so that the packing and the gland are always kept in a squeezed state inside the valve cover. When the valve stem rotates and moves, the packing is not subjected to any rotational radial force, thereby ensuring the sealing of the packing inside the device, thereby increasing the service life of the packing.

[0004] In view of the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: most of the forged steel stop valves on the market currently have a single sealing surface, which is easily worn after long-term use, resulting in valve failure. In view of the above defects, the forged steel stop valve is improved by providing two valve flaps so that the valve body has a double sealing effect, which greatly reduces the occurrence of leakage accidents. Utility Model Content

[0005] The technical problem to be solved by the utility model is that in the prior art, most forged steel stop valves on the market have a single sealing surface, which is easily worn after long-term use, resulting in valve failure. For this reason, we propose a new double-sealed forged steel stop valve.

[0006] In order to achieve the above-mentioned objectives, the present application adopts the following technical scheme: a new type of double-sealed forged steel stop valve, comprising a valve body, both sides of the valve body are fixedly connected with mounting valve plates, the top end of the valve body is fixedly connected to a first connecting pipe by bolts, the top end of the first connecting pipe is fixedly connected to a second connecting pipe by bolts, the inner cavity of the valve body is slidably connected to a valve stem, the inner cavity of the valve stem is connected to a threaded rod by threads, the top end of the threaded rod is fixedly connected to a turntable, the bottom end of the turntable is fixedly connected to a limiting rod, the surface of the second connecting pipe is fixedly connected to a hollow block, the inner cavity of the hollow block is slidably connected to a sliding column, the top end of the sliding column is fixedly connected to the limiting block, a limiting hole is opened on the surface of the hollow block, the inner cavity of the limiting hole is slidably connected to the limiting column, and the surface of the limiting column is slidably connected to the inner cavity of the sliding column.

[0007] Preferably, a first spring is fixedly connected to the inner cavity of the sliding column, and one end of the first spring close to the limiting column is fixedly connected to the limiting column.

[0008] Preferably, a guiding groove is formed inside the hollow block, a guiding rod is slidably connected to the inner cavity of the guiding groove, and one end of the guiding rod close to the sliding column is fixedly connected to the sliding column.

[0009] Preferably, a second spring is fixedly connected to the inner cavity of the hollow block, and the top end of the second spring is fixedly connected to the sliding column.

[0010] Preferably, a directional groove is formed inside the first connecting pipe, a directional block is slidably connected to the inner cavity of the directional groove, and one end of the directional block close to the valve rod is fixedly connected to the valve rod.

[0011] Preferably, a first valve flap is fixedly connected to the bottom end of the valve rod, and the first valve flap is in a circular ring shape.

[0012] Preferably, a second valve flap is fixedly connected to the bottom end of the first valve flap, and the bottom end of the second valve flap is adapted to the inner diameter of the inner cavity of the valve body.

[0013] Technical effects and advantages of the present utility model:

[0014] In the present utility model, a worker presses the limiting column to make the limiting column slide in the inner cavity of the sliding column. At this time, the worker can pull down the limiting block to drive the sliding column to slide in the inner cavity of the hollow block. As the inner diameter of the limiting block gradually moves away from the surface of the limiting rod, the limiting rod will no longer be restricted by the limiting block. The worker can rotate the turntable to drive the valve rod to move upward through threaded connection. The valve rod drives the first valve flap and the second valve flap to displace. At this time, the inner diameter of the inner cavity of the valve body is not blocked by the first valve flap, and the inner cavity of the valve body is in a flowing state. As the valve rod gradually moves upward, the valve rod drives the bottom end of the second valve flap to block and seal the inner diameter of the inner cavity of the valve body. Through the setting of the above structure, the valve body has a double sealing effect, greatly reducing the occurrence of leakage accidents. Description of the Drawings

[0015] Figure 1 is the front view structural schematic diagram of the present utility model;

[0016] Figure 2 is the top view structural sectional view of the present utility model;

[0017] Figure 3 is the split view of the limiting structure of the present utility model;

[0018] Figure 4 is the sectional view of the guiding structure of the present utility model;

[0019] Figure 5 This is a schematic diagram of the internal structure of the present utility model.

[0020] Legend: 1. Valve body; 2. Mounting valve disc; 3. First connecting pipe; 4. Second connecting pipe; 5. Valve stem; 6. Threaded rod; 7. Turntable; 8. Limiting rod; 9. Hollow block; 10. Slide column; 11. Limiting block; 12. Limiting hole; 13. Limiting column; 14. First spring; 15. Guide groove; 16. Guide rod; 17. Second spring; 18. Directional groove; 19. Directional block; 20. First valve flap; 21. Second valve flap. Detailed implementation manners

[0021] Now, the present utility model will be further described in detail with reference to the accompanying drawings and preferred embodiments. These drawings are all simplified schematic diagrams, only showing the basic structure of the present utility model in a schematic way, so they only show the components related to the present utility model.

[0022] Refer to Figure 1 - Figure 5As shown in the figure, the present utility model provides a technical solution: a new type of double-sealed forged steel globe valve, which includes a valve body 1. Both sides of the valve body 1 are fixedly connected with mounting valve plates 2. The top of the valve body 1 is fixedly connected with a first connecting pipe 3 by bolts. The top of the first connecting pipe 3 is fixedly connected with a second connecting pipe 4 by bolts. A valve stem 5 is slidably connected to the inner cavity of the valve body 1. A threaded rod 6 is threadedly connected to the inner cavity of the valve stem 5. The top of the threaded rod 6 is fixedly connected with a turntable 7. The bottom of the turntable 7 is fixedly connected with a limiting rod 8. A hollow block 9 is fixedly connected to the surface of the second connecting pipe 4. A sliding column 10 is slidably connected to the inner cavity of the hollow block 9. The top of the sliding column 10 is fixedly connected with a limiting block 11. A limiting hole 12 is formed on the surface of the hollow block 9. A limiting column 13 is slidably connected to the inner cavity of the limiting hole 12. The surface of the limiting column 13 is slidably connected to the inner cavity of the sliding column 10. When the staff needs to make the valve body 1 achieve a double-sealing effect, the staff presses the limiting column 13, so that the surface of the limiting column 13 slides in the inner cavity of the sliding column 10. At the same time, the limiting column 13 squeezes the first spring 14 to store energy. As the surface of the limiting column 13 gradually disengages from the inner cavity of the limiting hole 12, at this time, the sliding column 10 will no longer be restricted by the limiting column 13. The staff can pull down the limiting block 11, so that the limiting block 11 drives the surface of the sliding column 10 to slide in the inner cavity of the hollow block 9. At the same time, the sliding column 10 drives the surface of the guiding rod 16 to slide in the inner cavity of the guiding groove 15, so that the sliding column 10 squeezes the second spring 17 to store energy. As the inner diameter of the limiting block 11 gradually moves away from the surface of the limiting rod 8, at this time, the limiting rod 8 will no longer be restricted by the limiting block 11. The staff can rotate the turntable 7, so that the turntable 7 drives the threaded rod 6 to rotate, and the threaded rod 6 drives the valve stem 5 to move upward through threaded connection. The valve stem 5 drives the surface of the orientation block 19 to slide in the inner cavity of the orientation groove 18. At this time, the valve stem 5 drives the first valve flap 20 and the second valve flap 21 to displace. The aperture in the inner cavity of the valve body 1 is not blocked by the first valve flap 20, and the inner cavity of the valve body 1 is in a flowing state. As the valve stem 5 gradually moves upward, the valve stem 5 drives the bottom end of the second valve flap 21 to seal and block the aperture in the inner cavity of the valve body 1. At this time, the aperture in the inner cavity of the valve body 1 is in a sealed state. Through the setting of the above structure, the valve body 1 has a double-sealing effect, greatly reducing the occurrence of leakage accidents.

[0023] Refer to Figure 3 As shown in the figure, in this implementation scheme: a first spring 14 is fixedly connected to the inner cavity of the sliding column 10. One end of the first spring 14 close to the limiting column 13 is fixedly connected to the limiting column 13. By the staff pressing the limiting column 13, the limiting column 13 squeezes the first spring 14 to store energy. Through the setting of the first spring 14, the rebounding force of the first spring 14 continuously pushes the limiting column 13 to displace outward, so that the surface of the limiting column 13 is clamped and limited with the inner cavity of the limiting hole 12.

[0024] Refer to Figure 3As shown in the figure, in this implementation: a guiding groove 15 is provided inside the hollow block 9, and a guiding rod 16 is slidably connected to the inner cavity of the guiding groove 15. One end of the guiding rod 16 close to the sliding column 10 is fixedly connected to the sliding column 10. The staff pulls down the limiting block 11, so that the sliding column 10 drives the surface of the guiding rod 16 to slide in the inner cavity of the guiding groove 15. Through the setting of the above structure, when the sliding column 10 displaces, it maintains a directional displacement, preventing the limiting block 11 from shifting and affecting the clamping and limiting with the limiting rod 8.

[0025] Refer to Figure 3 As shown in the figure, in this implementation: a second spring 17 is fixedly connected to the inner cavity of the hollow block 9, and the top end of the second spring 17 is fixedly connected to the sliding column 10. The staff pulls down the sliding column 10, so that the sliding column 10 compresses the second spring 17 to store energy. Through the setting of the second spring 17, the rebounding force of the second spring 17 continuously pushes the sliding column 10 and the limiting block 11 to displace upward, enabling the limiting block 11 to have a continuous acting force for clamping the limiting rod 8.

[0026] Refer to Figure 4 As shown in the figure, in this implementation: a directional groove 18 is provided inside the first connecting pipe 3, and a directional block 19 is slidably connected to the inner cavity of the directional groove 18. One end of the directional block 19 close to the valve stem 5 is fixedly connected to the valve stem 5. The staff rotates the turntable 7, so that the turntable 7 drives the threaded rod 6 to rotate, and the threaded rod 6 drives the valve stem 5 to displace through threaded connection, so that the valve stem 5 drives the surface of the directional block 19 to slide in the inner cavity of the directional groove 18. Through the setting of the above structure, when the valve stem 5 displaces, it maintains a directional displacement, preventing the threaded rod 6 from causing the valve stem 5 to shift when rotating, which affects the sealing effect of the inner cavity of the valve body 1.

[0027] Refer to Figure 5 As shown in the figure, in this implementation: a first valve flap 20 is fixedly connected to the bottom end of the valve stem 5, and the shape of the first valve flap 20 is circular. Through the setting of the first valve flap 20, the first valve flap 20 can effectively block the aperture at the top end of the inner cavity of the valve body 1, improving its sealing effect.

[0028] Refer to Figure 5 As shown in the figure, in this implementation: a second valve flap 21 is fixedly connected to the bottom end of the first valve flap 20, and the bottom end of the second valve flap 21 is adapted to the aperture of the inner cavity of the valve body 1. Through the setting of the second valve flap 21, after the valve stem 5 moves upward to a certain distance, the bottom end of the second valve flap 21 blocks the aperture at the bottom end of the inner cavity of the valve body 1, realizing double sealing and more effectively preventing leakage accidents.

[0029] Working principle: When the staff needs to make the valve body 1 achieve a double-sealing effect, the staff presses the limit post 13, so that the surface of the limit post 13 slides in the inner cavity of the sliding post 10. At the same time, the limit post 13 squeezes the first spring 14 to store energy. As the surface of the limit post 13 gradually disengages from the inner cavity of the limit hole 12, at this time the sliding post 10 will no longer be restricted by the limit post 13. The staff can pull down the limit block 11, so that the limit block 11 drives the surface of the sliding post 10 to slide in the inner cavity of the hollow block 9. At the same time, the sliding post 10 drives the surface of the guide rod 16 to slide in the inner cavity of the guide groove 15, so that the sliding post 10 squeezes the second spring 17 to store energy. As the inner diameter of the limit block 11 gradually moves away from the surface of the limit rod 8, at this time the limit rod 8 will no longer be restricted by the limit block 11. The staff can rotate the turntable 7, so that the turntable 7 drives the threaded rod 6 to rotate, and the threaded rod 6 drives the valve stem 5 to move upward through threaded connection. The valve stem 5 drives the surface of the orientation block 19 to slide in the inner cavity of the orientation groove 18. At this time, the valve stem 5 drives the first valve flap 20 and the second valve flap 21 to displace. The aperture of the inner cavity of the valve body 1 is not blocked by the first valve flap 20, and the inner cavity of the valve body 1 is in a flowing state. As the valve stem 5 gradually moves upward, the valve stem 5 drives the bottom end of the second valve flap 21 to seal and block the aperture of the inner cavity of the valve body 1. At this time, the aperture of the inner cavity of the valve body 1 is in a sealed state. Through the setting of the above structure, the valve body 1 has a double-sealing effect, greatly reducing the occurrence of leakage accidents.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A new type of double-sealed forged steel globe valve, comprising a valve body (1), characterized in that: On both sides of the valve body (1), mounting valve plates (2) are fixedly connected. At the top of the valve body (1), a first connecting pipe (3) is fixedly connected by bolts. At the top of the first connecting pipe (3), a second connecting pipe (4) is fixedly connected by bolts. Inside the valve body (1), a valve rod (5) is slidably connected. Inside the valve rod (5), a threaded rod (6) is connected by threads. At the top of the threaded rod (6), a turntable (7) is fixedly connected. At the bottom of the turntable (7), a limiting rod (8) is fixedly connected. On the surface of the second connecting pipe (4), a hollowed-out block (9) is fixedly connected. Inside the hollowed-out block (9), a sliding column (10) is slidably connected. At the top of the sliding column (10), a limiting block (11) is fixedly connected. On the surface of the hollowed-out block (9), a limiting hole (12) is formed. Inside the limiting hole (12), a limiting column (13) is slidably connected. The surface of the limiting column (13) is slidably connected with the inside of the sliding column (10).

2. The novel double-sealed forged steel stop valve according to claim 1, characterized in that: Inside the sliding column (10), a first spring (14) is fixedly connected. One end of the first spring (14) close to the limiting column (13) is fixedly connected with the limiting column (13).

3. A new type of double-sealed forged steel globe valve according to claim 1, characterized in that: Inside the hollowed-out block (9), a guiding groove (15) is formed. Inside the guiding groove (15), a guiding rod (16) is slidably connected. One end of the guiding rod (16) close to the sliding column (10) is fixedly connected with the sliding column (10).

4. A novel double-sealed forged steel globe valve according to claim 1, characterized in that: Inside the hollowed-out block (9), a second spring (17) is fixedly connected. The top of the second spring (17) is fixedly connected with the sliding column (10).

5. A novel double-sealed forged steel globe valve according to claim 1, characterized in that: Inside the first connecting pipe (3), an orienting groove (18) is formed. Inside the orienting groove (18), an orienting block (19) is slidably connected. One end of the orienting block (19) close to the valve rod (5) is fixedly connected with the valve rod (5).

6. A novel double-sealed forged steel globe valve according to claim 1, wherein: At the bottom of the valve rod (5), a first valve flap (20) is fixedly connected. The shape of the first valve flap (20) is circular ring-shaped.

7. A novel double-sealed forged steel globe valve according to claim 6, characterized in that: At the bottom of the first valve flap (20), a second valve flap (21) is fixedly connected. The bottom of the second valve flap (21) is adapted to the inner diameter of the valve body (1).

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