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Single eccentric butterfly valve with double sealing pairs

An eccentric butterfly valve and double-sealing technology, which is applied in the direction of lifting valves, valve devices, combustion engines, etc., can solve the problems of unbalanced torque of the shaft of the valve stem, the butterfly valve cannot be applied to high-pressure working conditions, and the valve is difficult to open and close, etc., to achieve good sealing effect of effect

Pending Publication Date: 2022-05-24
ZHONGHONG VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned valve structure has great disadvantages: firstly, the second eccentricity of the double eccentric and triple eccentric structures will generate unbalanced torque on both sides of the valve stem rotation axis, which will make it difficult to open and close the valve; secondly, because the butterfly valve is one-sided Sealing structure, when the valve is subjected to reverse pressure, the sealing pair will tend to detach under the action of the medium force, so the butterfly valve is usually not suitable for high-pressure working conditions

Method used

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  • Single eccentric butterfly valve with double sealing pairs
  • Single eccentric butterfly valve with double sealing pairs
  • Single eccentric butterfly valve with double sealing pairs

Examples

Experimental program
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Effect test

Embodiment 1

[0041] This embodiment provides a double-sealed pair single-eccentric butterfly valve, refer to figure 1 and figure 2 As shown, it includes a valve body 100, a valve stem 200 and an actuator 300, the valve body 100 is provided with a valve cavity 110, the actuator 300 is arranged on the valve body 100, the power input end of the valve stem 200 and the output of the actuator 300 The end is connected, and the power output end extends into the valve cavity 110 .

[0042] The double-sealed pair single eccentric butterfly valve further includes two groups of sealing mechanisms 400, the two groups of sealing mechanisms 400 are respectively arranged on two opposite sides of the valve stem 200, and each sealing mechanism 400 includes a butterfly plate 410, a valve seat 420 and a limit assembly 430; The butterfly plate 410 is fixedly connected with the valve stem 200 , the valve seat 420 is slidably arranged in the valve cavity 110 , the limiting component 430 includes a blocking rin...

Embodiment 2

[0051] This embodiment relates to a double-sealing pair single-eccentric butterfly valve, which has substantially the same structure as the double-sealing pair single-eccentric butterfly valve described in the first embodiment. The difference lies in that, in this embodiment, refer to Figure 4 and Figure 5 As shown, it also includes a casing 510, a transmission unit 520 and a buffer mechanism 530, the casing 510 is arranged on the valve body 100, the transmission unit 520 and the buffer mechanism 530 are arranged in the casing 510; the power output end of the valve stem 200 passes through Out of the valve body 100 and extending into the housing 510, the transmission unit 520 is arranged between the power output end and the buffer mechanism 530; when the valve stem 200 drives the butterfly plate 410 to rotate in the direction of being combined with the corresponding valve seat 420, the buffer mechanism 530 The transmission unit 520 provides a buffer force for the rotation of ...

Embodiment 3

[0068] This embodiment relates to a double-sealing pair single-eccentric butterfly valve, which is substantially the same in structure as the double-sealing pair single-eccentric butterfly valve provided in the second embodiment. The difference is that in this embodiment, refer to Figure 5 As shown, the rack 522 is provided with an actuating portion 5222, the housing 510 is provided with a sounding assembly 700, and the sounding assembly 700 is located on the sliding path of the actuating portion 5222; when the butterfly plate 410 is rotated to be combined with the corresponding valve seat 420, The actuating part 5222 acts on the sounding element to make the sounding element emit sound.

[0069] When closing the butterfly valve, even though the butterfly plate 410 may have been rotated in place, the operator will continue to apply torque to the butterfly plate 410 because the operator does not realize that the butterfly plate 410 has been rotated in place in time, which may ca...

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Abstract

The invention provides a single eccentric butterfly valve with double sealing pairs, relates to the technical field of butterfly valves, and aims to solve the technical problem of poor sealing effect of the butterfly valve. The double-sealing-pair single-eccentric butterfly valve comprises a valve body, a valve rod and an executing mechanism, a valve cavity is formed in the valve body, the executing mechanism is arranged on the valve body, the power input end of the valve rod is connected with the output end of the executing mechanism, and the power output end of the valve rod extends into the valve cavity. The double-sealing-pair single eccentric butterfly valve further comprises two sets of sealing mechanisms which are arranged on the two opposite sides of the valve rod respectively, and each sealing mechanism comprises a butterfly plate, a valve seat and a limiting assembly. The butterfly plate is fixedly connected with the valve rod, the valve seat is arranged in the valve cavity in a sliding mode, the limiting assembly comprises a baffle ring and an elastic piece, the baffle ring is fixedly arranged on the inner wall of the valve cavity and located on the side, away from the valve rod, of the valve seat, and the elastic piece abuts against the baffle ring and the valve. The single eccentric butterfly valve with the double sealing pairs has a good sealing effect.

Description

technical field [0001] The invention relates to the technical field of butterfly valves, in particular to a double-sealing pair single-eccentric butterfly valve. Background technique [0002] Butterfly valve refers to a valve whose closing member is a disc, which rotates around the valve shaft to open and close. It has a simple structure and a wide range of applications. [0003] At present, the eccentric butterfly valve on the market is a double eccentric and triple eccentric structure with a single seal pair. The above valve structure has great shortcomings: firstly, the second eccentricity of the double eccentric and triple eccentric structure will generate unbalanced torque on both sides of the valve stem rotating shaft, which will make it difficult to open and close the valve; secondly, because the butterfly valve is unilateral Sealing structure, when the valve is subjected to reverse pressure, the sealing pair will tend to break away under the action of the medium for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/22F16K1/226F16K1/32F16K1/42F16K1/46
CPCF16K1/223F16K1/2266F16K1/32F16K1/427F16K1/465Y02T10/12
Inventor 陈锦标石荐畅李跃飞范志河王露
Owner ZHONGHONG VALVE CO LTD
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