Online disassembling and assembling tool for top-mounted ball valve

Abstract

The invention relates to an on-line disassembling and assembling tool for a top-mounted ball valve. The on-line disassembling and assembling tool is characterized by consisting of three parts, namelya base, an operating arm and a driving mechanism; two mounting holes which vertically pass through the base and a through hole which passes through the base in a front-back direction are formed in thebase; a semi-annular plate is arranged on the upper portion of the operating arm; operating rods vertically extend downwards from two ends of the semi-annular plate; spherical protrusions capable ofabutting against the end face of a valve seat are symmetrically arranged at the lower ends of the two operating rods; and the driving mechanism is composed of a screw and a nut. The tool has the advantages of simple structure, convenience in use and low manufacturing cost; and the tool is simple and convenient to assemble and disassemble. The operating rods of the operating arms occupy a small space, so that the original structure of the ball valve does not need to be changed; and the spherical protrusions abutting against the valve seat are symmetrically arranged on the two operating rods respectively, so that it is guaranteed that the valve seat is stressed in a balanced mode. With the on-line disassembling and assembling tool for the top-mounted ball valve of the invention adopted, theball valve is very simple and convenient to assemble and disassemble on line; time and labor can be saved; working efficiency is greatly improved; operation is stable and reliable; and the componentsof the ball valve cannot be damaged.

Description

technical field [0001] The invention relates to a tool for disassembling and assembling a valve, in particular to an online disassembling and assembling tool for a top-mounted ball valve. Background technique [0002] The feature of the top entry ball valve is that it has the function of online maintenance. When the valve fails during use, it is not necessary to disassemble the valve from the pipeline, and the valve cover and valve stem can be combined by disassembling the connecting parts between the valve cover and the valve body. Parts are separated from the valve body, and then the ball and seat assembly are removed from the valve body cavity to realize online maintenance and repair of the ball, seat and other internal valve components. The existing problems are: due to factors such as the small cavity space in the body of the top-entry ball valve, the compact structure, and the large pre-tightening force of the valve seat spring, it is very difficult to disassemble and ...

AI Technical Summary

Problems solved by technology

The existing problems are: due to factors such as the small space in the cavity of the top-entry ball valve body, compact structure, and large seat spring preload, it is very difficult to disassemble and install the ball online, the operation is time-consuming and laborious, and the efficiency of disassembly and assembly is low.

The problem with this top-mounted ball valve online maintenance and disassembly device is that: the left side and the right side of the trapezoidal end of the inclined adjustment rod are provided with a longitudinally arranged guide mechanism, and the mobile device is installed on the left and right sides of the trapezoidal end. The structure of the dynamic top seat and the static top seat is relatively complicated, and the operation needs to have enough space, which is not suitable for use on compact valves; an inclined adjustment rod is used to exert thrust on the valve seat, and the force on the valve seat is not large. Symmetrical, it will cause the seat to stick and cause the operation to fail

The existing problems are: it is necessary to change the structure of the valve seat and open threaded holes on the sphere so that it can cooperate with the tooling mechanism, resulting in a complex structure of the valve seat and increased manufacturing costs; the installation and operation of the tooling mechanism is cumbersome and requires a ball valve Parts work together

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