Sealing structure for large-caliber low-vacuum butterfly valve

Abstract

The utility model belongs to the technical field of butterfly valves, and discloses a sealing structure for a large-caliber low-vacuum butterfly valve, the sealing structure comprises a valve body and a sealing plate, a driving mechanism body is arranged on one side of the valve body, a rotating shaft is arranged on one side of the driving mechanism body, the outer wall of the rotating shaft is rotationally sleeved with a threaded column, a sealing ring is arranged on the outer wall of the sealing plate, and a sealing ring is arranged on the outer wall of the sealing plate. And one side of the sealing plate is fixedly connected with a mounting block. By arranging the valve body, the rotating shaft, the sealing plate, the mounting block, the threaded column and the first threaded groove, the threaded rod is rotated to enable the limiting block to be separated from the limiting groove, the threaded column is rotated to be separated from the first threaded groove, then the sealing plate can be detached, and the mounting block on a new sealing plate is mounted on the rotating shaft; and the threaded column is rotated to be in threaded connection with the first threaded groove, and the limiting block is movably clamped with the limiting groove, so that the sealing plate can be disassembled and replaced by the device, and the service life of the device is greatly prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of butterfly valves, and more specifically, to a sealing structure for a large-diameter low-vacuum butterfly valve. Background Art

[0002] As is well known, a butterfly valve is a fluid switch with a disc-shaped opening and closing member that reciprocates about ninety degrees. It is usually used as a blocking, opening, flow regulating valve and damping valve function in fluid pipeline systems such as liquids and gases. A large-diameter low-vacuum butterfly valve refers to a valve with a diameter greater than one hundred centimeters.

[0003] However, most of the existing sealing structures for large-diameter low-vacuum butterfly valves on the market are integrated with the valve body and cannot disassemble and replace the sealing structure. Therefore, when the edge of the sealing structure wears after long-term use, the sealing effect of the valve body will become worse, which greatly reduces the service life of the device. Utility Model Content

[0004] In order to solve the above problems, the present application provides a sealing structure for a large-diameter low-vacuum butterfly valve.

[0005] The sealing structure for a large-diameter low-vacuum butterfly valve provided by the present application adopts the following technical solutions:

[0006] A sealing structure for a large-diameter low-vacuum butterfly valve includes a valve body and a sealing plate. A driving mechanism body is provided on one side of the valve body. A rotating shaft is provided on one side of the driving mechanism body. A threaded column is rotatably sleeved on the outer wall of the rotating shaft. A sealing ring is provided on the outer wall of the sealing plate. An installation block is fixedly connected to one side of the sealing plate. An installation groove is opened on one side of the installation block. A first threaded groove is opened on the inner wall of the installation groove.

[0007] A second threaded groove is opened on the inner wall of the first threaded groove. A threaded rod is threadedly sleeved on the inner wall of the second threaded groove. The bottom of the threaded rod is rotatably connected to a lifting block. A sliding groove is opened at the bottom of the lifting block. A second spring is fixedly connected to the inner wall of the sliding groove. The bottom of the second spring is fixedly connected to a limiting block. A limiting groove is opened on the outer wall of the threaded column.

[0008] Further, the rotating shaft is rotatably sleeved with the valve body. A groove is opened on the front surface of the sealing ring. A first spring is provided on the inner wall of the groove.

[0009] Through the above technical solutions, the first spring can improve the elasticity of the sealing ring, so that the sealing ring can better fill the gap between the sealing plate and the inner wall of the valve body, improving the sealing effect.

[0010] Further, the shape of the installation groove is a "semicircle" structure, and the threaded column is threadedly connected to the first threaded groove.

[0011] Through the above technical solution, the mounting block and the rotating shaft can be connected together through the connection of the threads.

[0012] Furthermore, a slider is fixedly connected to the outer wall of the lifting block, a slideway is formed in the inner wall of the second thread groove, and the slider is slidably connected to the slideway.

[0013] Through the above technical solution, through the sliding connection between the slideway and the slider, the lifting block can only move up and down without rotating.

[0014] Furthermore, one side of the limiting block is an inclined surface, and the outer wall of the limiting block is slidably connected to the inner wall of the chute.

[0015] Through the above technical solution, when the inclined surface of the limiting block is subjected to resistance, it will move towards the inside of the chute.

[0016] Furthermore, the shape of the limiting groove is an "annular" structure, and the inner wall of the limiting groove is slidably connected to the outer wall of the limiting block.

[0017] Through the above technical solution, through the clamping connection between the limiting block and the limiting groove, the limiting block can play a role in limiting the threaded column.

[0018] In summary, the present application includes at least the following beneficial technical effects:

[0019] (1) By providing the valve body, rotating shaft, sealing plate, mounting block, threaded column and first thread groove, rotating the threaded rod to disengage the limiting block from the limiting groove, and rotating the threaded column to disengage it from the first thread groove, the sealing plate can be disassembled. Install the mounting block on the new sealing plate on the rotating shaft, rotate the threaded column to make it threadedly connected to the first thread groove, and the limiting block is movably clamped with the limiting groove, thereby realizing that the device can disassemble and replace the sealing plate, and thus greatly extending the service life of the device.

[0020] (2) By providing the sealing plate, sealing ring, groove and first spring, the first spring can improve the elasticity of the sealing ring, so that the sealing ring can better fill the gap between the sealing plate and the inner wall of the valve body, improve the sealing effect, and thus bring an effective auxiliary effect to the device, further meeting the use requirements of the device, and thus worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a sealing structure for a large-diameter low-vacuum butterfly valve;

[0022] Figure 2 It is a front sectional view of the sealing ring in the present application;

[0023] Figure 3 It is a side view of the sealing plate in the present application;

[0024] Figure 4 This is a side sectional view of the mounting block in this application;

[0025] Figure 5 is Figure 4 an enlarged view of the structure at position A in

[0026] Description of the reference numerals in the figure:

[0027] 1. Valve body; 2. Rotating shaft; 3. Driving mechanism body; 4. Sealing plate; 5. Sealing ring; 6. Groove; 7. First spring; 8. Slideway; 9. Mounting block; 10. Mounting groove; 11. Threaded post; 12. Limiting groove; 13. First thread groove; 14. Slide block; 15. Second thread groove; 16. Threaded rod; 17. Lifting block; 18. Chute; 19. Second spring; 20. Limiting block. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0029] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0031] The following is a further detailed description of the present application in conjunction with the attached Figures 1-5 drawings.

[0032] The embodiments of the present application disclose a sealing structure for a large-diameter low-vacuum butterfly valve. Please refer to Figures 1-5 , which includes a valve body 1 and a sealing plate 4. A driving mechanism body 3 is provided on one side of the valve body 1. The driving mechanism body 3 is an existing device and will not be explained in detail here. A rotating shaft 2 is provided on one side of the driving mechanism body 3. A threaded column 11 is rotatably sleeved on the outer wall of the rotating shaft 2. A sealing ring 5 is provided on the outer wall of the sealing plate 4. An installation block 9 is fixedly connected to one side of the sealing plate 4. An installation groove 10 is formed on one side of the installation block 9. A first threaded groove 13 is formed on the inner wall of the installation groove 10.

[0033] A second threaded groove 15 is formed on the inner wall of the first threaded groove 13. A threaded rod 16 is threadedly sleeved on the inner wall of the second threaded groove 15. The bottom of the threaded rod 16 is rotatably connected to a lifting block 17. A sliding groove 18 is formed on the bottom of the lifting block 17. A second spring 19 is fixedly connected to the inner wall of the sliding groove 18. The bottom of the second spring 19 is fixedly connected to a limiting block 20. A limiting groove 12 is formed on the outer wall of the threaded column 11. Rotating the threaded rod 16 makes the limiting block 20 disengage from the limiting groove 12, and rotating the threaded column 11 to disengage it from the first threaded groove 13 allows the sealing plate 4 to be disassembled. Install the installation block 9 on the new sealing plate 4 on the rotating shaft 2, rotate the threaded column 11 to thread it into the first threaded groove 13, and the limiting block 20 is movably clamped with the limiting groove 12, thereby realizing that the device can disassemble and replace the sealing plate 4, and greatly extending the service life of the device.

[0034] In this embodiment, the rotating shaft 2 is rotatably sleeved with the valve body 1. A groove 6 is formed on the front surface of the sealing ring 5. A first spring 7 is provided on the inner wall of the groove 6. The first spring 7 can improve the elasticity of the sealing ring 5, so that the sealing ring 5 can better fill the gap between the sealing plate 4 and the inner wall of the valve body 1, improving the sealing effect.

[0035] In this embodiment, the shape of the installation groove 10 is a "semicircular" structure, and the threaded column 11 is threadedly connected to the first threaded groove 13. Through the threaded connection, the installation block 9 can be connected to the rotating shaft 2.

[0036] In this embodiment, a slider 14 is fixedly connected to the outer wall of the lifting block 17. A sliding track 8 is formed on the inner wall of the second threaded groove 15. The slider 14 is slidably connected to the sliding track 8. Through the sliding connection between the sliding track 8 and the slider 14, the lifting block 17 can only move up and down without rotating.

[0037] In this embodiment, one side of the limiting block 20 is an inclined surface, and the outer wall of the limiting block 20 is slidably connected to the inner wall of the sliding groove 18. When the inclined surface of the limiting block 20 is subjected to resistance, it will move into the interior of the sliding groove 18.

[0038] In this embodiment, the limiting groove 12 is in a "ring" - shaped structure, and the inner wall of the limiting groove 12 is slidably connected to the outer wall of the limiting block 20. Through the clamping connection between the limiting block 20 and the limiting groove 12, the limiting block 20 can play a role in limiting the threaded column 11.

[0039] The implementation principle of a sealing structure for a large - diameter low - vacuum butterfly valve in an embodiment of this application is as follows: First, when the sealing effect of the sealing plate 4 deteriorates and needs to be replaced, rotating the threaded rod 16 can drive the lifting block 17 to move upward, so that the limiting block 20 disengages from the limiting groove 12. Then, the threaded column 11 can be rotated to disengage it from the first threaded groove 13. Further, the mounting block 9 is no longer limited, and the mounting block 9 can be disassembled from the rotating shaft 2, and then the sealing plate 4 can be disassembled.

[0040] Second, rotate the threaded rod 16 to drive the lifting block 17 and the limiting block 20 to reset. Install the mounting block 9 on the new sealing plate 4 on the rotating shaft 2, rotate the threaded column 11 to make it threadedly connected to the first threaded groove 13. The inclined surface of the limiting block 20 will move into the inside of the sliding groove 18 under the resistance of one end of the threaded column 11. When the limiting groove 12 passes through the second threaded groove 15, the limiting block 20 will be reset through the second spring 19 and be movably clamped with the limiting groove 12. Thus, the threaded column 11 will not automatically reverse.

[0041] Finally, the sealing ring 5 is extruded between the sealing plate 4 and the inner wall of the valve body 1. The first spring 7 can improve the elasticity of the sealing ring 5, so that the sealing ring 5 can better fill the gap between the sealing plate 4 and the inner wall of the valve body 1, improving the sealing effect.

[0042] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A sealing structure for a large-caliber low-vacuum butterfly valve, comprising a valve body (1) and a sealing plate (4), characterized in that: A driving mechanism body (3) is provided on one side of the valve body (1), a rotating shaft (2) is provided on one side of the driving mechanism body (3), a threaded column (11) is rotatably sleeved on the outer wall of the rotating shaft (2), a sealing ring (5) is provided on the outer wall of the sealing plate (4), a mounting block (9) is fixedly connected to one side of the sealing plate (4), a mounting groove (10) is provided on one side of the mounting block (9), and a first threaded groove (13) is provided on the inner wall of the mounting groove (10); The inner wall of the first thread groove (13) is provided with a second thread groove (15), the inner wall of the second thread groove (15) is threadedly sleeved with a threaded rod (16), the bottom of the threaded rod (16) is rotatably connected to a lifting block (17), the bottom of the lifting block (17) is provided with a sliding groove (18), the inner wall of the sliding groove (18) is fixedly connected to a second spring (19), the bottom of the second spring (19) is fixedly connected to a limiting block (20), and the outer wall of the thread column (11) is provided with a limiting groove (12).

2. A sealing structure for a large-caliber low-vacuum butterfly valve according to claim 1, characterized in that: The rotating shaft (2) is rotatably sleeved with the valve body (1); a groove (6) is provided on the front surface of the sealing ring (5); and a first spring (7) is provided on the inner wall of the groove (6).

3. The sealing structure for a large-caliber low-vacuum butterfly valve according to claim 1 is characterized in that: The shape of the installation groove (10) is a "semi-circular" structure, and the threaded column (11) is threadedly connected to the first threaded groove (13).

4. The sealing structure for a large-caliber low-vacuum butterfly valve according to claim 1 is characterized in that: The outer wall of the lifting block (17) is fixedly connected with a sliding block (14), the inner wall of the second thread groove (15) is provided with a sliding track (8), and the sliding block (14) is slidably connected with the sliding track (8).

5. The sealing structure for a large-caliber low-vacuum butterfly valve according to claim 1 is characterized in that: One side of the limit block (20) is an inclined surface, and the outer wall of the limit block (20) is slidably connected to the inner wall of the slide groove (18).

6. The sealing structure for a large-caliber low-vacuum butterfly valve according to claim 1 is characterized in that: The limiting groove (12) is in the shape of a "ring" structure, and the inner wall of the limiting groove (12) is slidably connected to the outer wall of the limiting block (20).

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