Butterfly valve with good sealing performance

Abstract

The butterfly valve with the good sealing performance comprises a supporting device, alignment devices are fixedly installed on the two sides of the supporting device, the supporting device comprises flange plates, a butterfly plate, a valve rod, a valve body, a synchronous rod, a displacement support, a guide side rod and a threaded rod, and the flange plates are fixedly installed at the two ends of the outer ring of the valve body; the valve rod is rotationally installed in the center of the top end of the valve body, the butterfly plate is fixedly installed in the center of the bottom end of the valve rod, the threaded rods are rotationally installed in the centers of the two sides of the valve body, the displacement supports are connected to the outer rings of the threaded rods in a threaded and sleeving mode, and the guide side rods are symmetrically and fixedly installed on the two sides of the valve body. The guide side rods are located above and below the threaded rod, the synchronous rods are fixedly installed at the top end and the bottom end of the displacement support, and the alignment device comprises an arc ring, a plastic gasket and a rubber ring. Through the arrangement of the alignment device and the supporting device, the purpose of improving the sealing performance of the butterfly valve connecting flange is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a butterfly valve with good sealing performance. Background Technique

[0002] The butterfly valve, abbreviated as a butterfly valve, is a kind of throttle valve and an important device in the water supply and drainage pipeline system. With the progress of industrial technology, different requirements are put forward for the structure and performance of the butterfly valve. Therefore, when designing and selecting, reasonable choices should be made for its type, material, connection form, etc. according to the working conditions.

[0003] For example, a butterfly valve with the Chinese patent publication number CN209725233U includes a valve body. The top of the valve body is connected to a rotating wheel disc through a fixed shaft. A valve stem is installed inside the valve body, and fastening gaskets are arranged at both ends of the valve stem. The bottom end of the valve stem is fixed to a valve seat body through a fastening collar. The valve stem passes through the valve seat body and is connected to a valve core, and sealing shaft seals are installed at both ends of the valve core. A butterfly plate is installed at the bottom of the valve core, and a sealing sleeve is arranged at the lower end of the butterfly plate. Fastening pieces are installed at both ends of the sealing sleeve. A pipeline body is installed below the valve body, and a flange is installed on the front surface of the pipeline body. Installation holes are arranged on the surface of the flange, and a total of sixteen installation holes are provided.

[0004] When the butterfly valve in the above patent is in use, it can only achieve the purpose of preventing component loosening. When the existing butterfly valve is in use, when the connecting flange on the butterfly valve is connected to the flange of the external pipeline, due to the sealing rubber gasket between the two flanges, there will be a small gap between the two flanges, resulting in leakage between the two flanges in the later stage. Therefore, a device is needed to improve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a butterfly valve with good sealing performance to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A butterfly valve with good sealing performance includes a support device, and alignment devices are fixedly installed on both sides of the support device. The support device includes a flange, a butterfly plate, a valve stem, a valve body, a synchronous rod, a displacement bracket, a guiding side rod, and a threaded rod. The flange is fixedly installed at both ends of the outer circle of the valve body. The valve stem is rotatably installed at the center of the top of the valve body. The butterfly plate is fixedly installed at the center of the bottom end of the valve stem. The threaded rod is rotatably installed at the centers of both sides of the valve body. The displacement bracket is threadedly sleeved on the outer circle of the threaded rod. The guiding side rods are symmetrically and fixedly installed on both sides of the valve body, and the guiding side rods are located above and below the threaded rod. The synchronous rod is fixedly installed at the top and bottom ends of the displacement bracket.

[0007] Preferably, the alignment device comprises an arc ring, a plastic gasket and a rubber ring, the plastic gasket is fixedly mounted on the inner ring of the arc ring, and the rubber ring is fixedly mounted on the inner ring of the plastic gasket.

[0008] Preferably, the arc ring is fixedly mounted on both ends of the synchronization rod close to the flange.

[0009] Preferably, the displacement bracket is slidably sleeved between the two guide side rods.

[0010] Preferably, the rubber ring is aligned with the top end of the flange facing away from the valve stem.

[0011] Preferably, a threaded hole is provided at the center of the displacement bracket.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] When the device is in use, the threaded rod can be screwed to drive the displacement bracket to move toward one end close to the valve body, so that the synchronization rod can drive the plastic gasket and the rubber ring to contact the flange respectively, and then the connection gap between the external flange and the flange can be docked, so that the gap can be sealed, and the threaded rod can be screwed forward and backward to drive the arc ring to move outward or inward respectively, so that the arc ring can be quickly disengaged from the flange, thereby completing the work of sealing the connection between the flange and the external flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the alignment device of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the support device of the utility model.

[0017] In the figure: 1-alignment device, 2-support device, 3-arc ring, 4-plastic gasket, 5-rubber ring, 6-flange, 7-butterfly plate, 8-valve stem, 9-valve body, 10-synchronizing rod, 11-displacement bracket, 12-guide side rod, 13-threaded rod. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figures 1-3 The utility model provides an embodiment: a butterfly valve with good sealing performance, including a supporting device 2, and a positioning device 1 is fixedly installed on both sides of the supporting device 2. The supporting device 2 includes a flange 6, a butterfly plate 7, a valve stem 8, a valve body 9, a synchronous rod 10, a displacement bracket 11, a guide side rod 12 and a threaded rod 13. The flange 6 is fixedly installed at both ends of the outer ring of the valve body 9, the valve stem 8 is rotatably installed at the top center of the valve body 9, the butterfly plate 7 is fixedly installed at the bottom center of the valve stem 8, the threaded rod 13 is rotatably installed at the center of both sides of the valve body 9, the displacement bracket 11 is threadedly sleeved on the outer ring of the threaded rod 13, the guide side rod 12 is symmetrically fixedly installed on both sides of the valve body 9, and the guide side rod 12 is located above and below the threaded rod 13, and the synchronous rod 10 is fixedly installed at the top and bottom of the displacement bracket 11.

[0020] The alignment device 1 includes an arc ring 3, a plastic gasket 4 and a rubber ring 5. The plastic gasket 4 is fixedly installed on the inner ring of the arc ring 3, and the rubber ring 5 is fixedly installed on the inner ring of the plastic gasket 4. When the arc ring 3 moves, it can drive the plastic gasket 4 and the rubber ring 5 to move simultaneously.

[0021] The circular arc rings 3 are fixedly mounted on both ends of the synchronization rod 10 close to the flange 6. When the synchronization rod 10 moves, the two circular arc rings 3 can be driven to move simultaneously.

[0022] The displacement bracket 11 is slidably sleeved between the two guide side rods 12, and can support the displacement bracket 11 to move along a straight line.

[0023] The rubber ring 5 is aligned with the top end of the flange 6 which faces away from the valve stem 8 , so that the rubber ring 5 can enter the gap between the pipeline flange and the flange 6 .

[0024] A threaded hole is provided at the center of the displacement bracket 11 , and when the threaded rod 13 is screwed, the displacement bracket 11 can be driven to move.

[0025] Working principle: when in use, first move the device to suspend between the flanges of the external pipeline, and then pass the external bolts through the flange 6 and the flange on the pipeline in turn, so that the flange 6 can be installed on the external pipeline, and then the threaded rod 13 can be screwed and rotated, and a threaded hole is provided inside the displacement bracket 11, so that when the threaded rod 13 rotates counterclockwise, the displacement bracket 11 can be driven to move toward the end close to the valve stem 8. At the same time, the displacement bracket 11 is slidably sleeved on the guide side rod 12, so that the displacement bracket 11 can be supported to move along a straight line, and is fixedly installed on the top and bottom ends of the displacement bracket 11 through the synchronization rod 10, and the arc ring 3 is fixedly installed on the two ends of the synchronization rod 10 close to the flange 6, so that when the displacement bracket 11 moves in the direction close to the valve body 9, the arc ring 3 can be driven to approach the flange 6 at the same time, and the rubber ring 5 and the flange 6 are away from the valve stem 8. The side end surfaces are aligned so that the arc ring 3 can drive the rubber ring 5 to enter the gap between the pipe flange and the flange 6, which can reduce the probability of subsequent leakage between the two flanges. Subsequently, the threaded rod 13 can be continuously screwed to drive the arc ring 3 to continue to move until the plastic gasket 4 is tightly fitted to the pipe flange and the flange 6, so that the two flanges can be sealed again, effectively reducing the probability of leakage between the two flanges and improving the sealing performance between the two flanges. When the device is in use, when the flange 6 needs to be removed, the threaded rod 13 can be rotated clockwise to drive the displacement bracket 11 to move toward the end away from the valve body 9, so that the synchronization rod 10 can drive the plastic gasket 4 and the rubber ring 5 to disengage from the flange 6, and then the bolts between the flange 6 and the flange on the external pipeline are removed, so that the device can be easily disassembled from the external pipeline to complete the work.

[0026] 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 butterfly valve with good sealing performance, comprising a supporting device (2), with positioning devices (1) fixedly mounted on both sides of the supporting device (2), characterized in that: The supporting device (2) comprises a flange (6), a butterfly plate (7), a valve stem (8), a valve body (9), a synchronization rod (10), a displacement bracket (11), a guide side rod (12) and a threaded rod (13), wherein the flange (6) is fixedly mounted on both ends of the outer ring of the valve body (9), the valve stem (8) is rotatably mounted at the top center of the valve body (9), the butterfly plate (7) is fixedly mounted at the bottom center of the valve stem (8), the threaded rod (13) is rotatably mounted at the centers of both sides of the valve body (9), the displacement bracket (11) is threadedly sleeved on the outer ring of the threaded rod (13), the guide side rod (12) is symmetrically fixedly mounted on both sides of the valve body (9), and the guide side rod (12) is located above and below the threaded rod (13), and the synchronization rod (10) is fixedly mounted at the top and bottom of the displacement bracket (11); The alignment device (1) comprises a circular arc ring (3), a plastic gasket (4) and a rubber ring (5); the plastic gasket (4) is fixedly mounted on the inner ring of the circular arc ring (3), and the rubber ring (5) is fixedly mounted on the inner ring of the plastic gasket (4).

2. A butterfly valve with good sealing performance according to claim 1, characterized in that: The circular arc ring (3) is fixedly mounted on both ends of the synchronization rod (10) close to the flange (6).

3. A butterfly valve with good sealing performance according to claim 2, characterized in that: The displacement bracket (11) is slidably sleeved between the two guide side rods (12).

4. A butterfly valve with good sealing performance according to claim 3, characterized in that: The rubber ring (5) is aligned with the top end of the flange (6) facing away from the valve stem (8).

5. A butterfly valve with good sealing performance according to claim 4, characterized in that: A threaded hole is provided at the center of the displacement bracket (11).

Images