Double-eccentric butterfly valve with sealing valve seat convenient to disassemble and replace

Abstract

The utility model relates to the technical field of double-eccentric butterfly valves, and discloses a double-eccentric butterfly valve with a sealing valve seat convenient to disassemble and replace, which comprises a valve body, a connecting flange plate is fixedly assembled at one end of the valve body, a mounting block is fixedly assembled on the outer wall of the valve body, a connecting sleeve is fixedly assembled on the outer wall of the valve body, and the sealing valve seat is fixedly assembled on the connecting sleeve. The inner wall of the connecting sleeve is rotationally connected with a rotating shaft, a connecting shaft is arranged on the inner wall of the rotating shaft, the outer edge of the connecting shaft is rotationally connected with a mounting sleeve, and the mounting sleeve is mounted on the valve body. Through detachable arrangement of the valve body and the detachable sealing valve seat, the detachable sealing valve seat can be taken down from the valve body to be replaced, the detachable sealing valve seat is fixed in the valve body through the blocking flange plate, meanwhile, the blocking flange plate can be connected with a pipeline, and therefore the problems that an existing sealing valve seat cannot be independently replaced, and the sealing valve seat cannot be replaced independently are solved. And the whole valve body needs to be replaced during replacement, so that the maintenance cost is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of double eccentric butterfly valves, in particular to a double eccentric butterfly valve which is convenient for disassembling and replacing a sealing valve seat. Background Art

[0002] Double eccentric butterfly valve is a regulating and intercepting device on water pipelines. Double eccentric butterfly valve is also called high-performance butterfly valve. It is mainly used for drainage in water plants, power plants, steel mills, chemical industry, water source projects, environmental facilities construction and other systems. It is especially suitable for use as a regulating and intercepting device on water pipelines. Compared with the centerline butterfly valve, the double eccentric butterfly valve is more resistant to high pressure, has a longer life and good stability.

[0003] The sealing valve seats on the existing double eccentric butterfly valves are formed integrally with the valve body. When the valve is opened and closed for a long time, the sealing valve seat and the valve will be worn. At the same time, the materials passing through the valve body will also wear the sealing valve seat and the valve, resulting in poor sealing. The current sealing valve seat cannot be replaced separately. When replacing, the entire valve body needs to be replaced, which leads to increased maintenance costs. At the same time, when replacing the existing valve, the entire shaft needs to be removed for replacement. In the process of removing the shaft, the worm box needs to be disassembled, which leads to cumbersome maintenance and long maintenance time. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a double eccentric butterfly valve that is easy to disassemble and replace a sealing valve seat, which has the advantages of facilitating replacement of the sealing valve seat, reducing maintenance costs and maintenance time, and solves the problems raised by the above-mentioned background technology.

[0005] The utility model provides the following technical solution: a double eccentric butterfly valve which is easy to disassemble and replace a sealing valve seat, comprising a valve body, one end of the valve body is fixedly equipped with a connecting flange, the outer wall of the valve body is fixedly equipped with a mounting block, the outer wall of the valve body is fixedly equipped with a connecting sleeve, the inner wall of the connecting sleeve is rotatably connected to a rotating shaft, the inner wall of the rotating shaft is provided with a connecting shaft, the outer edge of the connecting shaft is rotatably connected to a mounting sleeve, the mounting sleeve is installed on the valve body, and the inner wall of the valve body is slidably connected to a detachable sealing valve seat.

[0006] As a preferred technical solution of the utility model, a valve is movably sleeved on the outer edge of the connecting shaft, and the outer edges of the valve and the connecting shaft are both provided with insertion holes, and a latch is installed on the inner wall of the insertion hole.

[0007] As a preferred technical solution of the utility model, a baffle is installed at one end of the mounting sleeve away from the valve body, a block is fixedly mounted at one end of the connecting shaft away from the baffle, and a square groove is opened on the inner wall of the rotating shaft.

[0008] As an optimal technical solution of the utility model, a blocking flange is provided at one end of the valve body away from the connecting flange, and a long screw is fixedly installed on the outer edge of the blocking flange. The long screw passes through the mounting block, and a fixing nut is threadedly connected to the outer edge of the long screw.

[0009] As a preferred technical solution of the utility model, the contact surface between the valve body and the detachable sealing valve seat is provided with a ring groove 1, and the inner wall of the ring groove 1 is provided with a sealing ring 1.

[0010] As a preferred technical solution of the utility model, the contact surface between the detachable sealing valve seat and the blocking flange is provided with a second ring groove, and the inner wall of the second ring groove is fixedly equipped with a second sealing ring.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The double eccentric butterfly valve with easy disassembly and replacement of the sealing valve seat has a detachable arrangement of the valve body and the detachable sealing valve seat, so that the detachable sealing valve seat can be removed from the valve body for replacement, and the detachable sealing valve seat is fixed in the valve body by a blocking flange. At the same time, the blocking flange can also be connected to the pipeline, thereby solving the problem that the current sealing valve seat cannot be replaced separately and the entire valve body needs to be replaced during replacement, thereby increasing the maintenance cost.

[0013] 2. The double-eccentric butterfly valve which is easy to disassemble and replace the sealing valve seat, through the arrangement of the rotating shaft and the connecting shaft, when the valve needs to be replaced, the rotating shaft can remain stationary, and the valve can be disassembled by disassembly. Through the coordinated use of the square block and the square groove, the rotation of the rotating shaft can drive the connecting shaft and the valve to rotate, thereby solving the problem that the existing valve needs to remove the entire shaft for replacement, and the worm box needs to be disassembled during the process of removing the shaft, which leads to cumbersome maintenance and long maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the left three-dimensional structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure on the right side of the utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the connecting shaft and the rotating shaft structure of the utility model.

[0019] In the figure: 1. valve body; 2. connecting flange; 3. mounting block; 4. blocking flange; 5. connecting sleeve; 6. mounting sleeve; 7. baffle; 8. connecting shaft; 81. block; 82. socket; 9. rotating shaft; 91. square groove; 10. valve; 11. latch; 12. removable sealing valve seat; 13. ring groove one; 14. sealing ring one; 15. ring groove two; 16. sealing ring two; 17. long screw; 18. fixing nut. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 5 A double eccentric butterfly valve which is easy to disassemble and replace a sealing valve seat, comprises a valve body 1, one end of the valve body 1 is fixedly equipped with a connecting flange 2, the outer wall of the valve body 1 is fixedly equipped with a mounting block 3, the outer wall of the valve body 1 is fixedly equipped with a connecting sleeve 5, the inner wall of the connecting sleeve 5 is rotatably connected with a rotating shaft 9, the inner wall of the rotating shaft 9 is provided with a connecting shaft 8, the outer edge of the connecting shaft 8 is rotatably connected with a mounting sleeve 6, the mounting sleeve 6 is mounted on the valve body 1, and the inner wall of the valve body 1 is slidably connected with a detachable sealing valve seat 12, the detachable sealing valve seat 12 is detachably installed from the valve body 1, so that the detachable sealing valve seat 12 can be removed from the valve body 1 when it is worn, so that the detachable sealing valve seat 12 can be replaced, so that the butterfly valve does not need to be replaced as a whole, thereby reducing the use cost.

[0022] In a preferred embodiment, a valve 10 is movably sleeved on the outer edge of the connecting shaft 8, and both the valve 10 and the outer edge of the connecting shaft 8 are provided with a socket 82, and a latch 11 is installed on the inner wall of the socket 82. The valve 10 is installed on the connecting shaft 8 through the latch 11. When the valve 10 needs to be replaced, the latch 11 can be removed.

[0023] In a preferred embodiment, a baffle 7 is installed at one end of the mounting sleeve 6 away from the valve body 1, and a block 81 is fixedly assembled at one end of the connecting shaft 8 away from the baffle 7. A square groove 91 is opened on the inner wall of the rotating shaft 9, and the baffle 7 blocks the connecting shaft 8. When the connecting shaft 8 needs to be pulled out, the baffle 7 is removed from the mounting sleeve 6, and then the connecting shaft 8 can be pulled out. By utilizing the setting of the rotating shaft 9 and the connecting shaft 8, the connecting shaft 8 can be detached from the rotating shaft 9, so that the valve 10 is easy to replace. When replacing the valve 10, there is no need to dismantle the upper worm gear box. By utilizing the setting of the block 81 and the square groove 91, when the block 81 is located in the square groove 91, the rotation of the rotating shaft 9 can drive the connecting shaft 8 to rotate, thereby improving the rationality of the device.

[0024] In a preferred embodiment, a blocking flange 4 is provided at one end of the valve body 1 away from the connecting flange 2, and a long screw 17 is fixedly assembled on the outer edge of the blocking flange 4. The long screw 17 passes through the mounting block 3, and a fixing nut 18 is threadedly connected to the outer edge of the long screw 17. By arranging the blocking flange 4 to be detachable, the blocking flange 4 can limit the removable sealing valve seat 12, so that the removable sealing valve seat 12 will not shake in the valve body 1, thereby improving the stability of the device, and the pipeline can also be connected to the removable sealing valve seat 12, thereby improving the rationality of the device.

[0025] In a preferred embodiment, the contact surfaces of the valve body 1 and the removable sealing valve seat 12 are both provided with a ring groove 13, and a sealing ring 14 is installed on the inner wall of the ring groove 13. The setting of the sealing ring 14 can block the gap between the valve body 1 and the removable sealing valve seat 12, so that the liquid will not leak through the gap between the valve body 1 and the removable sealing valve seat 12. The sealing ring 14 plays a sealing role and improves the sealing performance of the device.

[0026] In a preferred embodiment, the contact surfaces of the removable sealing valve seat 12 and the blocking flange 4 are both provided with a ring groove 15, and the inner wall of the ring groove 15 is fixedly equipped with a sealing ring 16. Through the setting of the sealing ring 16, the gap between the removable sealing valve seat 12 and the blocking flange 4 can be blocked, so that external dust and impurities will not enter between the valve body 1 and the removable sealing valve seat 12 through the gap between the removable sealing valve seat 12 and the blocking flange 4, thereby further improving the sealing performance of the device.

[0027] Working principle: during use, when the removable sealing valve seat 12 needs to be replaced, unscrew the fixing nut 18, then remove the blocking flange 4 from the mounting block 3, at this time the blocking flange 4 is separated from the valve body 1, then remove the sealing ring 2 16 from the removable sealing valve seat 12, then pull the removable sealing valve seat 12 out of the valve body 1, then remove the sealing ring 14 from the ring groove 13 on the valve body 1, then install a new sealing ring 14 in the ring groove 13 on the valve body 1, then insert the new removable sealing valve seat 12 into the valve body 1, then place the new sealing ring 2 16 in the ring groove 2 15 on the removable sealing valve seat 12 , and then the long screw 17 passes through the mounting block 3. At this time, the blocking flange 4 is in contact with the valve body 1 and is fixed by the fixing nut 18. When the valve 10 needs to be replaced, the pin 11 is removed from the socket 82, and then the baffle 7 is removed, and then the connecting shaft 8 is pulled out from the mounting sleeve 6. At this time, the block 81 is disengaged from the square groove 91, and the connecting shaft 8 is gradually disengaged from the valve 10, so that the valve 10 can be taken out from the valve body 1 for replacement, and a new valve 10 is placed in the valve body 1, and then the connecting shaft 8 is inserted into the mounting sleeve 6 and the valve 10, and the block 81 is gradually entered into the square groove 91, and then the baffle 7 is installed on the mounting sleeve 6.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double eccentric butterfly valve that is easy to disassemble and replace a sealing valve seat, comprising a valve body (1), characterized in that: One end of the valve body (1) is fixedly equipped with a connecting flange (2), the outer wall of the valve body (1) is fixedly equipped with a mounting block (3), the outer wall of the valve body (1) is fixedly equipped with a connecting sleeve (5), the inner wall of the connecting sleeve (5) is rotatably connected to a rotating shaft (9), the inner wall of the rotating shaft (9) is provided with a connecting shaft (8), the outer edge of the connecting shaft (8) is rotatably connected to a mounting sleeve (6), the mounting sleeve (6) is mounted on the valve body (1), and the inner wall of the valve body (1) is slidably connected to a detachable sealing valve seat (12).

2. A double eccentric butterfly valve for easy disassembly and replacement of a sealing valve seat according to claim 1, characterized in that: The outer edge of the connecting shaft (8) is movably sleeved with a valve (10), and both the valve (10) and the outer edge of the connecting shaft (8) are provided with a plug hole (82), and the inner wall of the plug hole (82) is provided with a latch (11).

3. A double eccentric butterfly valve with easy disassembly and replacement of sealing valve seat according to claim 1, characterized in that: A baffle (7) is installed at one end of the mounting sleeve (6) away from the valve body (1), a block (81) is fixedly mounted at one end of the connecting shaft (8) away from the baffle (7), and a square groove (91) is provided on the inner wall of the rotating shaft (9).

4. A double eccentric butterfly valve with easy disassembly and replacement of sealing valve seat according to claim 1, characterized in that: A blocking flange (4) is provided at one end of the valve body (1) away from the connecting flange (2), and a long screw (17) is fixedly mounted on the outer edge of the blocking flange (4). The long screw (17) passes through the mounting block (3), and a fixing nut (18) is threadedly connected to the outer edge of the long screw (17).

5. The double eccentric butterfly valve with easy disassembly and replacement of the sealing valve seat according to claim 1, characterized in that: The contact surfaces of the valve body (1) and the detachable sealing valve seat (12) are both provided with a ring groove (13), and a sealing ring (14) is installed on the inner wall of the ring groove (13).

6. A double eccentric butterfly valve with a sealing valve seat that is easy to disassemble and replace according to claim 1, characterized in that: The contact surfaces of the detachable sealing valve seat (12) and the blocking flange (4) are both provided with a second ring groove (15), and the inner wall of the second ring groove (15) is fixedly equipped with a second sealing ring (16).

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