Anti-freezing ball valve capable of achieving online maintenance

Abstract

The invention relates to a ball valve capable of achieving online maintenance, in particular to an anti-freezing ball valve capable of achieving online maintenance. The anti-freezing ball valve comprises a valve body. A cylindrical cavity with the upper end being opened is formed in the middle part of the valve body. An upper end cover of the valve body is provided with a valve deck. The anti-freezing ball valve further comprises a valve ball. The inner wall of the cylindrical cavity of the valve body is in an arc shape, and two symmetrical sealing positioning blocks wrap the ball valve and are further attached to the inner wall for sealing. The two symmetrical sealing positioning blocks form the shape of [] after being attached. Upper positioning parts of the sealing positioning blocks clamp a valve rod, and lower positioning parts are matched with a positioning groove in the lower portion of the cylindrical cavity. Each sealing positioning block is internally provided with a concavearc-shaped part, and the middle part is in an arc shape and is further matched with the inner wall of the valve body. According to the ball valve, online maintenance is made easy, the structure is simple, the number of parts is small, mounting and positioning are accurate, and the sealing safety is high; and the size proportion of the sealing positioning blocks is large, the antifreezing functionis achieved, cost is low and the market promotional value is good.

Description

technical field [0001] The invention relates to an on-line maintainable ball valve, which is especially suitable for low temperature environment. Background technique [0002] Existing ball valve structures such as "A Ball Valve with Spiral Silencer Function" published by the announcement number CN 104006213A include a valve body and a bonnet with a connecting thread, and the junction of the valve body and the bonnet is coaxial with the connecting thread. When the switch fails, the connecting threads at both ends must be disassembled from the pipe for maintenance and replacement. If the hard pipe is connected to the valve, or in a narrow space, it is difficult to disassemble and maintain. [0003] Of course, there are ball valves with on-line maintenance on the market, such as the "Top-mounted Floating Ball Valve with Online Maintenance" in the announcement number CN 103925388A. In the ball valve, there are many sealing parts for the valve ball, including the outer gripper 5...

AI Technical Summary

Problems solved by technology

[0004] The sealing part of the ball valve similar to CN 104006213A only has the sealing ring 4, but why does the top entry ball valve need so many combinations of sealing parts? The parts are flat, and then the seal with the valve ball is realized; second, the assembly sequence is different, after the sealing ring 4 is installed, if the valve ball can be loaded from above, it is also limited due to the size of the parts; the third is the parts The positioning is complex and requires more components to guide and position

[0005] However, for ball valves whose main purpose is sealing, if there are more components to achieve sealing, the difficulty of assembly will be greater, the possibility of leakage will be greater, and the relative manufacturing cost will be high.

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