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Eccentric ball valve

An eccentric ball and eccentric technology, which is applied in the direction of valve devices, cocks including cutting devices, engine components, etc., can solve the problems of affecting the sealing performance of the valve core and valve seat, difficult processing of ball valves, and insufficient processing, so as to reduce the processing cost. Difficulty, reduce processing difficulty and processing accuracy, and ensure the effect of sealing performance

Active Publication Date: 2018-01-19
NEWAY VALVE SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is that when processing the double eccentric ball valve in the prior art, both the bonnet and the valve body need to be eccentrically processed, resulting in the difficulty of processing the ball valve and high cost; and the processing is not in place, affecting the valve core. Problems with the sealing performance of the valve seat

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0059] This embodiment provides an eccentric ball valve, such as figure 1 As shown, it includes a valve body 1 , a valve cover 7 , a valve stem 6 , a valve seat 5 , a hemispherical valve core 2 and a mounting structure 4 .

[0060] like figure 1 As shown, the valve body 1 has a top opening, a flow channel 13 extending along its axial direction, and an inlet 11 and an outlet 12 for the medium to flow into and out of the flow channel 13, respectively; the valve cover 7 is sealingly mounted on the top opening of the valve body 1 ; The bottom of the valve stem 6 extends into the flow channel 13 through the valve cover 7, the hemispherical valve core 2 is installed on the bottom of the valve stem 6 and is located in the flow channel 13; The valve seat 5 is eccentrically installed on the valve body through the installation structure 4 and sealed 1 on the inner wall and close to the outlet 12. like image 3 As shown, the rotation centerline L5 of the valve stem 6 is eccentric to t...

Embodiment 2

[0078] This embodiment provides an eccentric ball valve, which is different from the eccentric ball valve provided in Embodiment 1 in that no bearing may be provided between the first protrusion of the valve core 2 and the first groove of the valve body 1, only Depending on its structure and the thrust pad 3 , the first protrusion 21 at the bottom of the valve core 2 is rotatably installed in the first groove 14 through the cooperation between the first protrusion 21 and the first groove 14 . To ensure that the valve core 2 does not deviate from its rotation center, the valve core 2 and the valve seat 5 can be opened or closed normally.

[0079] As a first alternative embodiment, the valve core 2 and the valve body 1 may only be provided with protrusions and grooves, without the thrust pads 3, for installation, and through the cooperation of the first protrusions 21 and the first grooves 14, The first protrusion 21 at the bottom of the valve core 2 is rotatably installed in th...

Embodiment 3

[0086] This embodiment provides an eccentric ball valve. Compared with the eccentric ball valve provided in Embodiment 1 or Embodiment 2, the difference is that the eccentric distance e1 and the eccentric distance e2 are not equal, for example, e1: e2=1:2 or e1 : e2 = 2:1, the specific proportional relationship can be determined according to actual needs, as long as there are these two eccentric distances. At this time, when the valve stem drives the valve core to open, the required rotation angle is greater than three degrees, but regardless of the relationship between the eccentric distance e1 and the eccentric distance e2, the valve core can be opened only by turning the valve core ten degrees, making the valve core 2 and valve seat 5 are quickly disengaged.

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Abstract

The invention discloses an eccentric ball valve. The valve rod rotary center line and the valve core spherical center line are eccentrically arranged, share the same surface with the flow pass centerline and are perpendicular to the flow pass center line. When a valve core and a valve seat are in a closed state, a sealed surface is formed between the surfaces, making contact with each other, of the valve core and the valve seat, and the center line of the sealed surface and the flow pass center line are eccentrically arranged. In the prior art, eccentricity of the flow pass center line and the valve rod rotary center line are shifted to eccentricity of the sealed surface center line and the flow pass center line, when the eccentric ball valve is machined, a valve cover and a valve body donot need to be subjected to eccentric treatment on the vertical axis, and only the sealed surface needs to be subjected to eccentric treatment, so that the machining difficulty and manufacturing costof the eccentric ball valve are reduced, and the machining precision is improved; and when the eccentric ball valve is assembled, a valve rod and the valve core can be easier to mount in place in a flow pass, and the sealing property between the valve core and the valve seat is ensured.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to an eccentric ball valve. Background technique [0002] In recent years, with the increasingly prominent environmental problems, liquefied natural gas (LNG) has also developed rapidly as a clean and efficient energy source. At the same time, with the implementation of the national energy policy, domestic construction projects are becoming more and more prosperous. Therefore, the market for ultra-low temperature valves will become more and more broad in the future. [0003] As one of the most widely used valves, the ball valve has the advantages of reliable sealing, simple structure, convenient maintenance, the sealing surface and the ball are often closed, and it is not easy to be eroded by the medium. Due to the particularity of the ultra-low temperature medium, taking LNG as an example, the volume of LNG will expand by 600 times after heating up, which will cause a sudden increa...

Claims

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Application Information

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IPC IPC(8): F16K5/06F16K5/20
Inventor 安晓虎丁城
Owner NEWAY VALVE SUZHOU
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