A valve seat plug valve

Abstract

The utility model relates to valve technical field, and disclose a kind of movable valve seat plug valve, including plug valve body, the upper surface of plug valve body is rotatably connected with connecting cover, the upper surface of plug valve body is fixedly connected with fixed block, the outer surface of connecting cover is fixedly connected with first connecting rod, the inside of first connecting rod is equipped with cavity, the surface of connecting cover is equipped with through slot, the inside of cavity is connected with the inside of connecting cover by means of through slot, the surface of fixed block is fixedly connected with first tooth, the inside of cavity is provided with operating rod, the cooperation between connecting cover and connecting block makes first clamping tooth and second clamping tooth all be located in the inside of connecting cover, to effectively protect it, avoid external knock to cause its damage condition, to effectively improve the effect of limiting, prolong the service life of device, improve the reliability and durability of limiting.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a movable valve seat plug valve. Background Technology

[0002] Valves are control components in fluid transport systems, with functions such as shut-off, regulation, flow guidance, backflow prevention, pressure stabilization, diversion, or overflow pressure relief. Plug valves are a type of valve, among which manual plug valves are widely used due to their advantages of simple operation and low maintenance costs. Manual plug valves are operated by manually rotating a handle to rotate the plug. However, the handle is relatively long, requiring space on the side and affecting the installation of other valve bodies or pipelines. Moreover, the handle is easily deflected from its original position by external force, causing the plug to deflect and altering the conditions within the fluid passage.

[0003] In the prior art, CN220816698U discloses a plug valve. Although the prior art avoids accidental activation and achieves the effect of limiting the position, in actual use, because both the annular toothed ring and the retaining teeth are exposed, metal debris and dust may cause jamming between the toothed ring and the retaining teeth after prolonged use. This can lead to the retaining teeth being unable to slide smoothly into the tooth groove, making valve operation difficult, jamming, or even completely inoperable. Furthermore, the teeth may be damaged, deformed, or even broken during maintenance or accidental collisions with tools, pipelines, or other equipment, affecting the meshing accuracy and subsequent limiting stability, severely impacting the lifespan of the device, resulting in poor practicality and safety. Therefore, we propose a plug valve with a movable seat to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a movable valve seat plug valve to solve the problem of inconvenience in the use of some existing plug valves.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a movable valve seat plug valve, comprising a plug valve body, a connecting cover rotatably connected to the upper surface of the plug valve body, a fixing block fixedly connected to the upper surface of the plug valve body, a first connecting rod fixedly connected to the outer surface of the connecting cover, a cavity formed inside the first connecting rod, a through groove formed on the surface of the connecting cover, the cavity communicating with the interior of the connecting cover via the through groove, a first tooth fixedly connected to the surface of the fixing block, an operating rod disposed inside the cavity, an arc-shaped plate disposed inside the connecting cover, a second tooth fixedly connected to the side surface of the arc-shaped plate facing the fixing block, the first tooth and the second tooth being compatible, and a connecting assembly disposed on the surface of the arc-shaped plate.

[0006] Preferably, a switching rod is rotatably connected to the upper surface of the fixed block, the upper end of the switching rod is fixedly connected to the top wall of the connecting cover, and the lower end of the switching rod rotatably penetrates the interior of the plug valve body.

[0007] Preferably, the connecting assembly includes a connecting block, which is fixedly connected to the surface of the arc-shaped plate away from the second tooth, the connecting block is slidably connected inside the through groove, and the connecting block extends slidably into the interior of the cavity.

[0008] Preferably, the connecting block has a circular groove inside, and the operating rod extends movably into the inside of the circular groove.

[0009] Preferably, a fixing rod is fixedly connected to the inner wall of the circular groove, and an arc-shaped ball groove is formed on the surface of the operating rod. A ball is movably arranged inside the arc-shaped ball groove, and the ball and the fixing rod are fixedly connected.

[0010] Preferably, a fixing plate is fixedly sleeved on the outer surface of one end of the operating rod located inside the cavity, and a torsion spring is fixedly connected between the fixing plate and the inner wall of the cavity, and the torsion spring is movably sleeved on the outside of the operating rod.

[0011] Preferably, the rear end of the operating lever rotatably extends through the outside of the first connecting rod, and the rear end of the operating lever is fixedly connected to a second connecting rod, with an extension handle hinged to the outside of the second connecting rod.

[0012] Preferably, a limiting frame is fixedly connected to the upper surface of the first connecting rod, the limiting frame is adapted to the extended handle, and a handle is fixedly connected to the surface of the extended handle.

[0013] Compared with the prior art, this utility model provides a movable valve seat plug valve, which has the following beneficial effects:

[0014] 1. This movable valve seat plug valve, through the cooperation between the connecting cover and the connecting block, ensures that the first and second locking teeth are all located inside the connecting cover, thereby effectively protecting them and preventing damage caused by external impacts. This effectively improves the limiting effect, extends the service life of the device, and enhances the reliability and durability of the limiting mechanism.

[0015] 2. This movable valve seat plug valve allows the operator to simply rotate the operating lever to release the limit switch, enabling locking and unlocking actions to be completed with one hand. This greatly reduces the number of steps required for operation, eliminating the need for both hands. It is simple to operate and highly practical. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a movable valve seat plug valve according to the present invention;

[0017] Figure 2 This is a cross-sectional view of the connecting cover of this utility model;

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 This is a cross-sectional view of the circular groove of this utility model;

[0020] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0021] Figure 6 This is a schematic diagram of the structure of the first connecting rod of this utility model.

[0022] In the diagram: 1. Plug valve body; 2. Connecting cover; 3. Fixing block; 4. Switching rod; 5. First connecting rod; 6. Cavity; 7. First tooth; 8. Operating rod; 9. Arc plate; 10. Second tooth; 11. Connecting block; 12. Circular groove; 13. Fixing rod; 14. Arc ball groove; 15. Ball; 16. Fixing plate; 17. Torsion spring; 18. Second connecting rod; 19. Extended handle; 20. Handle; 21. Limiting frame; 22. Through groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-6 This utility model provides a technical solution: a movable valve seat plug valve, including a plug valve body 1, a connecting cover 2 rotatably connected to the upper surface of the plug valve body 1, a fixing block 3 fixedly connected to the upper surface of the plug valve body 1, a first connecting rod 5 fixedly connected to the outer surface of the connecting cover 2, a cavity 6 opened inside the first connecting rod 5, a through groove 22 opened on the surface of the connecting cover 2, the cavity 6 communicating with the interior of the connecting cover 2 via the through groove 22, a first tooth 7 fixedly connected to the surface of the fixing block 3, an operating rod 8 arranged inside the cavity 6, an arc plate 9 arranged inside the connecting cover 2, a second tooth 10 fixedly connected to the side surface of the arc plate 9 facing the fixing block 3, the first tooth 7 and the second tooth 10 being adapted to each other, and a connecting component arranged on the surface of the arc plate 9.

[0025] In the above embodiments, the plug valve body 1 is a movable valve seat plug valve, which is an existing structure, so it will not be described again in the text.

[0026] A switching rod 4 is rotatably connected to the upper surface of the fixed block 3. The upper end of the switching rod 4 is fixedly connected to the top wall of the connecting cover 2. The lower end of the switching rod 4 rotatably passes through the interior of the plug valve body 1 and is connected to the valve core inside it.

[0027] The connecting assembly includes a connecting block 11, which is fixedly connected to the side surface of the arc plate 9 away from the second tooth 10. The connecting block 11 is slidably connected inside the through groove 22 and extends slidably into the cavity 6.

[0028] The connecting block 11 has a circular groove 12 inside, and the operating rod 8 can extend movably into the circular groove 12.

[0029] A fixed rod 13 is fixedly connected to the inner wall of the circular groove 12. An arc-shaped ball groove 14 is opened on the surface of the operating rod 8. A ball 15 is movably arranged inside the arc-shaped ball groove 14. The ball 15 and the fixed rod 13 are fixedly connected. When the operating rod 8 is rotated, since the positions of the fixed rod 13 and the ball 15 are fixed, and the arc-shaped ball groove 14 restricts the ball 15, the rotation of the operating rod 8 will drive the ball 15, the fixed rod 13 and the connecting block 11 to move. Subsequently, the second tooth 10 and the first tooth 7 can be separated by the movement of the connecting block 11.

[0030] In the above embodiment, when the operating lever 8 is rotated 180 degrees, the ball 15 and the fixed rod 13 will complete their entire journey inside the arc-shaped ball groove 14.

[0031] A fixing plate 16 is fixedly sleeved on the outer surface of one end of the operating lever 8 located inside the cavity 6. A torsion spring 17 is fixedly connected between the fixing plate 16 and the inner wall of the cavity 6. The torsion spring 17 is movably sleeved on the outside of the operating lever 8. When the operating lever 8 is rotated, the fixing plate 16 will also rotate synchronously, thereby causing the torsion spring 17 to deform, so that the operating lever 8 can be reset later.

[0032] The rear end of the operating lever 8 is rotatably extended through the outside of the first connecting rod 5. The rear end of the operating lever 8 is fixedly connected to the second connecting rod 18. The outside of the second connecting rod 18 is hinged to an extension handle 19. When the operator needs to unlock, rotating the extension handle 19 will drive the second connecting rod 18 to rotate. The rotation of the second connecting rod 18 will drive the rotation of the operating lever 8, thereby causing the connecting block 11 to move outside the operating lever 8 and inside the cavity 6.

[0033] A limiting frame 21 is fixedly connected to the upper surface of the first connecting rod 5. The limiting frame 21 is adapted to the extended handle 19. With the setting of the limiting frame 21, when the extended handle 19 needs to be stored, the extended handle 19 is flipped inside the limiting frame 21 by means of the hinge. At this time, the extended handle 19 will be locked inside the limiting frame 21 by its own weight. At this time, the second connecting rod 18 will not rotate. A handle 20 is fixedly connected to the surface of the extended handle 19. The handle 20 makes it easy for staff to take out the extended handle 19.

[0034] Working principle:

[0035] When using this movable valve seat plug valve, the operator uses the handle 20 to remove the extended handle 19 from inside the limiting frame 21. Then, using the extended handle 19, the operator rotates the second connecting rod 18. The rotation of the second connecting rod 18 drives the rotation of the operating rod 8. When the operating rod 8 rotates, since the positions of the fixed rod 13 and the ball 15 are fixed, and the arc-shaped ball groove 14 restricts the ball 15, the rotation of the operating rod 8 will cause the ball 15, the fixed rod 13, and the connecting block 11 to move. Subsequently, the movement of the connecting block 11 will separate the second tooth 10 and the first tooth 7, thus releasing the locking of the connecting cover 2. The operator can then use the extended handle 19, the second connecting rod 18, the first connecting rod 5, and the connecting cover 2 to drive the rotation of the switching rod 4, thereby controlling the opening degree of the plug valve body 1.

[0036] When the operating lever 8 is rotated, the fixed plate 16 will also rotate synchronously, thereby causing the torsion spring 17 to deform.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A movable seat plug valve, comprising a plug valve body (1), characterized in that: The upper surface of the plug valve body (1) is rotatably connected to a connecting cover (2), the upper surface of the plug valve body (1) is fixedly connected to a fixing block (3), the outer surface of the connecting cover (2) is fixedly connected to a first connecting rod (5), the first connecting rod (5) has a cavity (6) inside, the surface of the connecting cover (2) has a through groove (22), the cavity (6) is connected to the interior of the connecting cover (2) by means of the through groove (22), the surface of the fixing block (3) is fixedly connected to a first tooth (7), the cavity (6) is provided with an operating rod (8) inside, the interior of the connecting cover (2) is provided with an arc plate (9), the side surface of the arc plate (9) facing the fixing block (3) is fixedly connected to a second tooth (10), the first tooth (7) and the second tooth (10) are adapted to each other, and the surface of the arc plate (9) is provided with a connecting component.

2. The movable seat plug valve according to claim 1, characterized in that: The upper surface of the fixed block (3) is rotatably connected to a switching rod (4), the upper end of the switching rod (4) is fixedly connected to the top wall of the connecting cover (2), and the lower end of the switching rod (4) rotatably penetrates the interior of the plug valve body (1).

3. A movable seat plug valve according to claim 2, characterized in that: The connecting assembly includes a connecting block (11) which is fixedly connected to the side surface of the arc plate (9) away from the second tooth (10). The connecting block (11) is slidably connected inside the through groove (22) and extends slidably into the cavity (6).

4. A movable seat plug valve according to claim 3, characterized in that: The connecting block (11) has a circular groove (12) inside, and the operating rod (8) can extend movably into the circular groove (12).

5. A movable seat plug valve according to claim 4, characterized in that: The inner wall of the circular groove (12) is fixedly connected to a fixing rod (13), and the surface of the operating rod (8) is provided with an arc-shaped ball groove (14). A ball (15) is movably arranged inside the arc-shaped ball groove (14), and the ball (15) and the fixing rod (13) are fixedly connected.

6. A movable seat plug valve according to claim 5, characterized in that: A fixing plate (16) is fixedly sleeved on the outer surface of one end of the operating rod (8) located inside the cavity (6). A torsion spring (17) is fixedly connected between the fixing plate (16) and the inner wall of the cavity (6). The torsion spring (17) is movably sleeved on the outside of the operating rod (8).

7. A movable seat plug valve according to claim 6, characterized in that: The rear end of the operating lever (8) is rotatably extended through the outside of the first connecting rod (5), and the rear end of the operating lever (8) is fixedly connected to the second connecting rod (18), and the outside of the second connecting rod (18) is hinged to an extension handle (19).

8. A movable seat plug valve according to claim 7, characterized in that: A limiting frame (21) is fixedly connected to the upper surface of the first connecting rod (5). The limiting frame (21) and the extended handle (19) are adapted to each other. A handle (20) is fixedly connected to the surface of the extended handle (19).

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