Ball valves and stop devices for ball valve stems

A technology for stoppers and valve stems, which is applied to valve devices, devices to prevent accidental or unauthorized actions, cocks including cut-off devices, etc. Easy to lose and other issues

Active Publication Date: 2019-07-02
ZHEJIANG SANHUA COMMERCIAL REFRIGERATION CONTROLS CO LTD SHAOXING CITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] During system maintenance, it is necessary to unscrew the bonnet 8 first, then remove the stop ring, and then use a wrench to act on the valve stem 6 to close the ball valve. The maintenance work is cumbersome, and the stop ring is easy to lose, and it is easy to forget to reinstall the stop ring. on, resulting in the inability to exert the stop effect

Method used

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  • Ball valves and stop devices for ball valve stems
  • Ball valves and stop devices for ball valve stems
  • Ball valves and stop devices for ball valve stems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] like Figure 8-10 as shown, Figure 8 for Figure 5 Structural schematic diagram of the middle stop ring 3; Figure 9 for Figure 5 Axial sectional view of middle valve cap 5; Figure 10 for Figure 9 The three-dimensional schematic diagram of the middle valve cap 5.

[0054] In this embodiment, the inner wall of the bonnet 5 is provided with an internal thread 52, and the outer circumference of the stop ring 3 is correspondingly provided with a matching external thread 312. Since the stop ring 3 is set as an oblong shape in this solution, the outer Threads 312 can be formed on the circular arcs at both ends of the stop ring 3. The middle part of the stop ring 3 has a first insertion hole 311 for the valve stem 6 to be inserted into. Bit pin 32. The first insertion hole 311 is also oblong (also can be square or rectangular), which is the same shape as the upper end of the valve stem 6. When the valve stem 6 is inserted into the first insertion hole 311, the valve...

Embodiment 2

[0060] like Figure 11-12 as shown, Figure 11 It is a structural schematic diagram of the stop device in the second embodiment of the ball valve provided by the present invention; Figure 12 for Figure 11 Schematic diagram of the structure of the middle limiting piece 3'.

[0061] The structure of the ball valve in this embodiment is basically the same as that in Embodiment 1, the difference lies in the manner in which the stop ring 3 is limited to the bonnet 5 . This stop device also includes a limit piece 3' fixed with the stop ring 3, such as Figure 12 As shown, the limiting piece 3' is provided with a second socket 3'2 for the valve stem 6 to be inserted, and the outer periphery of the limiting piece 3' is provided with a limiting card edge 3'1, and the limiting card edge 3' in this embodiment 1. It is formed by a plurality of strip-shaped limit whiskers 3'1a arranged side by side, that is, the limit card edge 3'1 is in the shape of a comb as shown in the figure, an...

Embodiment 3

[0068] In this embodiment, the limiting card edge 3'1 can be directly arranged on the outer periphery of the stop ring 3, without separately setting the limiting piece 3'. The structure of the limiting card edge 3'1 can be the same as that of embodiment 2, that is, it is arranged in a comb-like shape, or a material that can shrink and rebound is selected. The limiting card edge 3'1 is also preferably inclined to prevent the limit The card edge 3'1 breaks away from the limiting groove 51.

[0069] In addition to the above embodiments, other ways can also be used to realize the circumferentially rotatable limitation of the stop ring 3 in the valve cap 5 . The inner wall of the bonnet 5 may not be provided with a limit groove 51, and the stop ring 3 can be directly placed in the bonnet 5, and then an anti-off piece is screwed into the bonnet 5 to prevent the stop ring 3 from breaking away from the valve cap. Cap 5; or, the bonnet 5 is designed as a split structure, and the bonne...

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Abstract

The invention discloses a ball valve and a stop device of a ball valve rod. The stop device comprises a stop part used for locking the valve rod to be at a preset position and a bonnet used for externally covering the valve rod. The stop part is rotatably limited into the bonnet in the circumferential direction. According to the scheme, owing to the fact that the stop part is limited into the bonnet, the stop part is installed after the valve rod position is adjusted, or the stop part is taken out during disassembling for repairing, and while the bonnet is assembled or disassembled, assembling and disassembling of the stop part are simultaneously achieved, so that the assembling and disassembling technology is simplified, the stop part is limited into the bonnet, so that the stop part is not prone to be lost or forgotten to be assembled. Meanwhile the stop part can freely rotate in the bonnet, and thus stop position adjusting of the stop part and assembling and disassembling of the bonnet are not mutually interfered.

Description

technical field [0001] The invention relates to the technical field of valve bodies, in particular to a ball valve and a stop device for a ball valve stem. Background technique [0002] As a valve switching element, ball valves are widely used in refrigeration systems based on their advantages of high efficiency and energy saving, and they can cut off and conduct the refrigerant. [0003] like figure 1 as shown, figure 1 It is a schematic structural diagram of a typical ball valve bonnet; figure 2 for figure 1 Schematic diagram of the structure after removing the bonnet. [0004] The ball valve includes a valve core ball 1 placed in the inner cavity of the valve seat and a valve body 2. The valve stem 6 is inserted into the valve body 2 and drives the valve core ball 1 located in the inner cavity of the valve body 2 to rotate. The valve core ball 1 has a through hole. When the valve stem 6 drives the valve core ball 1 to rotate to the through hole connected to the inle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K5/08F16K35/06F16K27/06
CPCF16K5/08F16K27/067F16K35/06
Inventor 不公告发明人
Owner ZHEJIANG SANHUA COMMERCIAL REFRIGERATION CONTROLS CO LTD SHAOXING CITY
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