Unlocking device for control rod drive lever
A technology of unlocking device and driving rod, which is applied in the control of nuclear reactions, reactors, reducing greenhouse gases, etc. It can solve the problems of difficult manual operation and inaccessibility of operators, and achieve the effect of convenient and fast operation, reliable and accurate positioning
Inactive Publication Date: 2012-01-25
CHINA NUCLEAR POWER ENG CO LTD
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Problems solved by technology
[0002] During the on-site installation of the pressurized water reactor nuclear power plant, reactor shutdown and refueling, and in-service inspection, it is necessary to realize the unlocking (tripping and connection) between the control rod drive rod assembly and the control rod assembly. After the nuclear power plant is in operation, the reactor cavity has a strong Radioactive, the control rod drive rod assembly is located about 4 meters below the water surface of the refueling pool in the reactor cavity, and the operator cannot approach it. In addition, when the control rod drive rod assembly is unlocked, multiple steps are required, and each step has a specified stroke and insertion. force, difficult to operate manually
Method used
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[0011] The control rod drive rod unlocking device of the present invention will be further described below in conjunction with specific embodiments.
[0012] Such as figure 1 and figure 2 As shown, the control rod driving rod unlocking device of the present invention includes a tubular housing 6, a support frame 9 is installed below the tubular housing 6, and a main cylinder 8 and two auxiliary cylinders 4, 10 are installed on the support frame 9, The lower end of the support frame 9 is connected with a claw sleeve 21, and the bottom end of the claw sleeve 21 is connected with a centering bell mouth 23, and the claw sleeve 21 is provided with a liftable claw sleeve 20. The upper end of the barrel 20 is connected with a spring seat 17, the spring seat 17 is provided with a spring 16, and the jaw sleeve 21 is provided with an outer sleeve 19 that can slide up and down along the jaw sleeve 21;
[0013] The upper end 11 of the piston rod of the main cylinder is connected to the...
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The invention relates to an unlocking device for a control rod drive lever. In the device, a main cylinder is used for driving a spindle of the control rod drive lever to do grabbing action, and two auxiliary cylinders are used for driving a shell of the control rod drive lever to do clamping action, so that the spindle of the control rod drive lever is pulled out of or inserted into the shell ofthe control rod drive lever by a fixed length, the diameter of the tail end of a control rod drive lever component is shrunk or restored, and the tail end of a drive lever component is pulled out of or inserted into (tripped from or connected with) the head of a control rod component smoothly. The device can position reliably and accurately, and is convenient, easy, safe and reliable to operate.
Description
technical field [0001] The invention relates to an unlocking device, in particular to an unlocking device for a control rod driving rod used in a nuclear power plant reactor. Background technique [0002] During the on-site installation of the pressurized water reactor nuclear power plant, reactor shutdown and refueling, and in-service inspection, it is necessary to realize the unlocking (tripping and connection) between the control rod drive rod assembly and the control rod assembly. After the nuclear power plant is in operation, the reactor cavity has a strong Radioactive, the control rod drive rod assembly is located about 4 meters below the water surface of the refueling pool in the reactor cavity, and the operator cannot approach it. In addition, when the control rod drive rod assembly is unlocked, multiple steps are required, and each step has a specified stroke and insertion. It is difficult to perform manual operation. Contents of the invention [0003] The object...
Claims
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IPC IPC(8): G21C7/16
CPCY02E30/39Y02E30/30
Inventor 王燕樊秀梅刘慧芳李建奇李永源
Owner CHINA NUCLEAR POWER ENG CO LTD