Auxiliary tool for opening and closing of threaded type valve cover of nuclear power station
An auxiliary tool and threaded technology, which is applied in the field of auxiliary tools for opening and closing the valve cover of threaded valves in nuclear power plants, can solve the problems that the pipe wrench or belt wrench cannot complete the torque requirement, there is no maintenance torque wrench, and the valve disintegrates, etc., to achieve Prevents insufficient torque application or injury to workers, wide application range, and high safety factor
Pending Publication Date: 2018-10-16
CLP CHINA NUCLEAR POWER ENG TECH
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Problems solved by technology
[0003] (1) Due to thermal expansion and contraction of individual valves, the friction force of the thread is too large, and the valve cannot be disassembled directly by using pipe wrench or belt wrench. Forced disassembly may cause equipment damage and tool damage.
[0004] (2) According to the requirements of maintenance regulations for this type of valve in nuclear power plants, in order to ensure that the valve does not leak, there is a torque requirement when the valve is reassembled. Pipe wrench or belt wrench cannot complete the torque requirement, and many power plants do not have this Torque wrench for maintenance of similar valves
Method used
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Embodiment
[0022] Such as figure 1 As shown, the present invention provides an auxiliary tool for convenient disassembly of threaded bonnet stop valve and torque tightening. The present invention has a "convex" type hexagonal-sleeve structure, and is used with a ring wrench or a torque wrench.
[0023] The present invention is made of 20 steel through machining, and the inside of the sleeve 2 is processed with 4 grooves 4, which are set on the valve yoke 7, and can be connected and closely matched with the valve yoke 7;
[0024] The protruding head of the present invention is processed into a hexagonal shape, used to cooperate with a ring wrench or a torque wrench, and can be processed into different sizes and specifications according to the specific specifications of the valve to be repaired.
[0025] Such as figure 2 Shown, the using method of the present invention is as follows:
[0026] When repairing the threaded bonnet stop valve on site, first remove the valve handwheel, set th...
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The invention relates to an auxiliary tool for opening and closing of a threaded type valve cover of a nuclear power station. The auxiliary tool is used for being coordinated with a spanner to open and close a threaded type valve. The auxiliary tool is of a boss-shaped structure and comprises a hexagonal convex head matched with the spanner and a sleeve used for sleeving a threaded type valve yokeframe and clamping the threaded type valve yoke frame, a shaft hole used for allowing the valve wheel shaft to be penetrated through is formed in the center of the hexagonal convex head, and a plurality of vertical grooves are formed in the sleeve. Compared with the prior art, the auxiliary tool has the advantages that the maintenance process standard is improved, the application range is wide and the safety coefficient is high.
Description
technical field [0001] The invention relates to a tool, in particular to an auxiliary tool for opening and closing a threaded valve cover of a nuclear power plant. Background technique [0002] There are many threaded bonnet stop valves installed in the nuclear island process system of nuclear power plants, as shown in the attached figure; most of these stop valves are key-level equipment and belong to forced sealing valves. In the process of disassembling and repairing such valves, the current method is to use pipe wrench or belt wrench to loosen the valve, and there is no suitable tool for torque tightening during the valve restoration and assembly process. This maintenance method has the following problems: [0003] (1) Due to thermal expansion and contraction of individual valves, the friction force of the thread is too large, and the valve cannot be disassembled directly by using pipe wrench or belt wrench. Forced disassembly may cause equipment damage and tool damage. ...
Claims
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IPC IPC(8): B25B23/00
CPCB25B23/0021
Inventor 陈昌盛徐宏光赵立怀吕闯
Owner CLP CHINA NUCLEAR POWER ENG TECH