Multi-layer sealing telescopic butterfly valve

Abstract

The utility model relates to the technical field of telescopic butterfly valves, in particular to a multi-layer sealing telescopic butterfly valve which comprises a butterfly valve body, a valve seat is arranged on the outer wall of the butterfly valve body, a valve rod is rotatably connected to the inner side of the valve seat, one end of the valve rod extends into the butterfly valve body and is fixedly connected with a valve plate, and the other end of the valve rod is fixedly connected with a valve rod. A telescopic pipe is arranged on one side of the butterfly valve body and can telescopically move on the outer wall of the connecting end pipe, specifically, the connecting end pipe extends into the telescopic groove, one end of the connecting end pipe abuts against a plurality of springs, and the position of the telescopic pipe on the outer wall of the connecting end pipe is adjusted according to the needed telescopic length. A sealing gasket is arranged between the connecting end pipe and the telescopic groove, the sealing gasket is used for sealing for the first time, after the telescopic pipe is installed, one side, close to the limiting ring, of the telescopic pipe is fixedly connected with a sealing ring, and the sealing ring is used for sealing for the second time. And a multi-layer sealing structure effectively improves the sealing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic butterfly valves, in particular to a multi-layer sealed telescopic butterfly valve. Background Art

[0002] As a component used to realize the on-off and flow control of pipeline systems, telescopic butterfly valves have been widely used in many fields such as petroleum, chemical industry, metallurgy, hydropower, etc. The butterfly plate of the telescopic butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0°-90°. When it rotates to 90°, the valve is fully open.

[0003] The existing butterfly valve body generally adopts the sealing method of valve body glue hanging, and the metal valve plate squeezes the lining in the valve body by rotating to achieve sealing. In the prior art, the butterfly valve is only used as a switch setting, but people often overlook that the butterfly valve also has the function of a connector. In different environments, the requirements for the length of the butterfly valve body are different, which requires the production of many butterfly valves of different specifications. This method is very inflexible and inefficient, and the telescopic butterfly valve only relies on the sealing ring to achieve sealing. During the long-term adjustment process, the sealing ring will be worn, resulting in poor sealing effect. Utility Model Content

[0004] The utility model aims to provide a multi-layer sealing telescopic butterfly valve, which has the characteristics of good sealing effect, convenient installation, cost saving and long service life.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-layer sealed telescopic butterfly valve, comprising a butterfly valve body, an outer wall of the butterfly valve body is provided with a valve seat, the inner side of the valve seat is rotatably connected to a valve stem, one end of the valve stem extends to the interior of the butterfly valve body and is fixedly connected to a valve plate, a telescopic tube is provided on one side of the butterfly valve body, a connecting end tube is provided on one side of the butterfly valve body, a telescopic groove is opened on one side of the telescopic tube, the connecting end tube is movably connected to the interior of the telescopic groove, a sealing gasket is provided between the connecting end tube and the telescopic groove, a limiting ring is fixedly connected to the inner side of the connecting end tube, and a sealing ring is fixedly connected to the side of the telescopic tube close to the limiting ring.

[0006] In order to facilitate locking and fixing the telescopic tube, as a preferred multi-layer sealed telescopic butterfly valve of the utility model, the outer wall of the telescopic tube is fixedly connected to a flange plate, the outer wall of the connecting end tube is fixedly connected to a connecting ring, and the connecting ring is fixedly connected to two symmetrically arranged fixing screws on one side close to the flange plate, the other ends of the two fixing screws both penetrate the flange plate, and the outer walls of the two fixing screws are threadedly connected to fixing nuts located on the other side of the flange plate.

[0007] In order to fix the telescopic tube in cooperation with the fixing screw and the fixing nut, as a preferred embodiment of the multi-layer sealed telescopic butterfly valve of the utility model, a plurality of evenly distributed springs are fixedly connected to the inner side of the telescopic groove.

[0008] In order to improve the connection stability and sealing performance, as a preferred multi-layer sealed telescopic butterfly valve of the utility model, the connecting end pipe and the telescopic groove are tightly and movably connected.

[0009] In order to improve the sealing performance and elasticity of the sealing gasket and the sealing ring, as a preferred multi-layer sealing telescopic butterfly valve of the utility model, the sealing gasket and the sealing ring are both made of fluororubber.

[0010] In order to make the connection between the end pipe and the telescopic pipe more stable, as a preferred multi-layer sealed telescopic butterfly valve of the utility model, the number of the springs is six.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] The telescopic tube is telescopically movable on the outer wall of the connecting end tube. Specifically, the connecting end tube extends into the inside of the telescopic groove, one end of the connecting end tube abuts against a plurality of springs, and the position of the telescopic tube on the outer wall of the connecting end tube is adjusted according to the required telescopic length, and then the fixing nut and the fixing screw are used to lock and fix the telescopic tube, and the spring is used to fix the telescopic tube. A sealing gasket is provided between the connecting end tube and the telescopic groove, and the sealing gasket is the first sealing. After the telescopic tube is installed, a sealing ring is fixedly connected to one side of the telescopic tube close to the limit ring, and the sealing ring is the second sealing. The multi-layer sealing structure effectively improves the sealing effect.

[0013] In addition, the inner diameter of the expansion tube has various specifications. When the diameter of the expansion tube of the butterfly valve needs to be changed, the expansion tube of the corresponding inner diameter can be inserted into the outer wall of the connecting end tube. The installation is convenient and flexible, and the cost is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the overall cross-sectional structural diagram of the utility model;

[0015] Figure 2 This is an enlarged structural diagram of part a of the utility model;

[0016] Figure 3 It is a side view structural diagram of the telescopic tube part of the utility model.

[0017] In the figure: 1. Butterfly valve body; 2. Valve seat; 3. Valve stem; 4. Valve plate; 5. Telescopic tube; 6. Connecting end tube; 7. Telescopic groove; 8. Sealing gasket; 9. Limiting ring; 10. Sealing ring; 11. Flange plate; 12. Connecting ring; 13. Fixing screw; 14. Fixing nut; 15. Spring. DETAILED DESCRIPTION

[0018] See also Figures 1 to 3 A multi-layer sealed telescopic butterfly valve comprises a butterfly valve body 1, a valve seat 2 is arranged on the outer wall of the butterfly valve body 1, a valve stem 3 is rotatably connected to the inner side of the valve seat 2, one end of the valve stem 3 extends to the inside of the butterfly valve body 1 and is fixedly connected to a valve plate 4, a telescopic tube 5 is arranged on one side of the butterfly valve body 1, a connecting end tube 6 is arranged on one side of the butterfly valve body 1, a telescopic groove 7 is opened on one side of the telescopic tube 5, the connecting end tube 6 is movably connected to the inside of the telescopic groove 7, a sealing gasket 8 is arranged between the connecting end tube 6 and the telescopic groove 7, a limiting ring 9 is fixedly connected to the inner side of the connecting end tube 6, and a sealing ring 10 is fixedly connected to the side of the telescopic tube 5 close to the limiting ring 9.

[0019] In this embodiment: the telescopic tube 5 is telescopically movable on the outer wall of the connecting end tube 6. Specifically, the connecting end tube 6 extends into the telescopic groove 7, one end of the connecting end tube 6 abuts against a plurality of springs 15, and the position of the telescopic tube 5 on the outer wall of the connecting end tube 6 is adjusted according to the required telescopic length, and then the fixing nut 14 and the fixing screw 13 are used to lock and fix the telescopic tube 5, and the spring 15 is used to fix the telescopic tube 5, wherein a sealing gasket 8 is provided between the connecting end tube 6 and the telescopic groove 7, and the sealing gasket 8 is the first sealing. After the telescopic tube 5 is installed, a sealing ring 10 is fixedly connected to one side of the telescopic tube 5 close to the limit ring 9, and the sealing ring 10 is the second sealing. The multi-layer sealing structure effectively improves the sealing effect;

[0020] In addition, the inner diameter of the telescopic tube 5 has various specifications. When the diameter of the butterfly valve telescopic tube 5 needs to be changed, the telescopic tube 5 with the corresponding inner diameter can be inserted into the outer wall of the connecting end tube 6. The installation is convenient and flexible, and the cost is saved.

[0021] As a technical optimization solution of the utility model, the outer wall of the telescopic tube 5 is fixedly connected to the flange plate 11, the outer wall of the connecting end tube 6 is fixedly connected to the connecting ring 12, and the connecting ring 12 is fixedly connected to two symmetrically arranged fixing screws 13 on the side close to the flange plate 11, the other ends of the two fixing screws 13 both penetrate the flange plate 11, and the outer walls of the two fixing screws 13 are threadedly connected to the fixing nuts 14 located on the other side of the flange plate 11.

[0022] In this embodiment, the telescopic tube 5 is fixed by locking the fixing nut 14 and the fixing screw 13 , and cooperating with the spring 15 .

[0023] As a technical optimization solution of the present invention, a plurality of evenly distributed springs 15 are fixedly connected to the inner side of the telescopic slot 7 .

[0024] In this embodiment: a plurality of evenly distributed springs 15 are fixedly connected to the inner side of the telescopic slot 7. After the connecting end tube 6 extends into the interior of the telescopic slot 7, the spring 15 is squeezed. The spring 15 has a force to push the connecting end tube 6 outward, and cooperates with the fixing nut 14 and the fixing screw 13 to lock and fix, thereby fixing the telescopic tube 5.

[0025] As a technical optimization solution of the utility model, the connecting end pipe 6 and the telescopic groove 7 are tightly and movably connected.

[0026] In this embodiment, the connecting end tube 6 and the telescopic groove 7 are tightly and movably connected, thereby improving the connection stability and sealing performance of the connecting end tube 6 and the telescopic tube 5 .

[0027] As a technical optimization solution of the present invention, the sealing pad 8 and the sealing ring 10 are both made of fluororubber.

[0028] In this embodiment, the sealing pad 8 and the sealing ring 10 are both made of fluororubber, which has good sealing effect, good elasticity and long service life.

[0029] As a technical optimization solution of the present utility model, the number of the springs 15 is six.

[0030] In this embodiment, the number of springs 15 is six and they are evenly distributed, thereby improving the connection stability of the telescopic tube 5 .

[0031] Working principle: the telescopic tube 5 is telescopic and movable on the outer wall of the connecting end tube 6. Specifically, the connecting end tube 6 extends to the inside of the telescopic groove 7. One end of the connecting end tube 6 abuts against multiple springs 15. The position of the telescopic tube 5 on the outer wall of the connecting end tube 6 is adjusted according to the required telescopic length. Then, it is locked and fixed by the fixing nut 14 and the fixing screw 13, and the spring 15 is used to fix the telescopic tube 5. A sealing gasket 8 is arranged between the connecting end tube 6 and the telescopic groove 7. The sealing gasket 8 is the first seal. After the telescopic tube 5 is installed, a sealing ring 10 is fixedly connected to the side of the telescopic tube 5 close to the limit ring 9. The sealing ring 10 is the second seal. The multi-layer sealing structure effectively improves the sealing effect.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-layer sealed telescopic butterfly valve, comprising a butterfly valve body (1), characterized in that: The outer wall of the butterfly valve body (1) is provided with a valve seat (2), the inner side of the valve seat (2) is rotatably connected to a valve stem (3), one end of the valve stem (3) extends to the inside of the butterfly valve body (1) and is fixedly connected to a valve plate (4), a telescopic tube (5) is provided on one side of the butterfly valve body (1), a connecting end tube (6) is provided on one side of the butterfly valve body (1), a telescopic groove (7) is provided on one side of the telescopic tube (5), the connecting end tube (6) is movably connected to the inside of the telescopic groove (7), a sealing gasket (8) is provided between the connecting end tube (6) and the telescopic groove (7), the inner side of the connecting end tube (6) is fixedly connected to a limit ring (9), and a sealing ring (10) is fixedly connected to the side of the telescopic tube (5) close to the limit ring (9).

2. A multi-layer sealed telescopic butterfly valve according to claim 1, characterized in that: The outer wall of the telescopic tube (5) is fixedly connected to a flange plate (11), the outer wall of the connecting end tube (6) is fixedly connected to a connecting ring (12), and the connecting ring (12) is fixedly connected to one side of the flange plate (11) with two symmetrically arranged fixing screws (13), the other ends of the two fixing screws (13) both penetrate the flange plate (11), and the outer walls of the two fixing screws (13) are threadedly connected to fixing nuts (14) located on the other side of the flange plate (11).

3. The multi-layer sealing telescopic butterfly valve according to claim 1, characterized in that: A plurality of evenly distributed springs (15) are fixedly connected to the inner side of the telescopic slot (7).

4. The multi-layer sealing telescopic butterfly valve according to claim 1, characterized in that: The connecting end tube (6) and the telescopic groove (7) are tightly and movably connected.

5. The multi-layer sealing telescopic butterfly valve according to claim 1, characterized in that: The sealing pad (8) and the sealing ring (10) are both made of fluororubber.

6. The multi-layer sealing telescopic butterfly valve according to claim 3, characterized in that: The number of the springs (15) is six.

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