A plug-in and pull-out aid for a core measurement detector assembly of a nuclear power plant

Abstract

The present invention belongs to the technical field of core measurement detectors, and specifically relates to an auxiliary plug-in and pull-out device for a core measurement detector assembly of a nuclear power plant. It includes a metal rod, a lower metal sleeve, an upper metal sleeve, a spring, a metal handle, a metal connecting block, an eccentric metal rod, and a clamping metal groove; the lower metal sleeve and the upper metal sleeve are inserted into the metal rod, the upper metal sleeve is connected to the metal handle, the lower metal sleeve is connected to the upper metal sleeve, the spring is located inside the upper metal sleeve, the clamping metal groove is connected to the lower metal sleeve, and the two sides of the metal connecting block are respectively welded to the clamping metal groove and the outer side of the lower metal sleeve; the eccentric metal rod is fixed to the metal connecting block and connected to the clamping metal groove. The present invention can achieve the purpose of saving working time, reducing the number of personnel and reducing the radiation dose.

Description

Technical Field

[0001] The invention belongs to the technical field of core measurement detectors, and in particular relates to an inserting and removing aid device for a core measurement detector assembly of a nuclear power plant. Background Art

[0002] The main function of the core measurement detector is to monitor the power and water level of the core in real time. The detector is inserted into the core through a guide tube, and its integrated length reaches more than 10 meters. The detector of the Hualong One core measurement system is located in the upper reactor internals. During installation and overhaul, the detector needs to be inserted and pulled out, and the operation is relatively frequent and the number is relatively large. In order to shorten the time, reduce the damage to the detector caused by manpower and the impact of long-term radiation on personnel, the research and design of the detector plug-in and pull-out tool can reduce the participation and influence of personnel, and can control the force during installation and insertion.

[0003] Before the design of this plug-in tool, the current domestic practice for installing and removing in-pile detectors was to manually plug and unplug them through the pile top platform. This method has the following shortcomings: 1) When plugging and unplugging by hand, the magnitude and direction of the force cannot be controlled, which can easily cause the detector to get stuck in the guide tube and wear the detector. 2) The radiation dose on the top of the pile is high in the early stage of overhaul, which can easily cause high radiation risks to personnel; 3) The working environment is harsh and requires a large number of people to work at the same time; 4) The plug-in and unplug time is relatively long due to the large number of detectors. Summary of the invention

[0004] Due to the large number of detectors, the need for a large number of workers during installation and removal, as well as the imprecise control of manpower, and taking into account the harsh working environment, the present invention provides an auxiliary plugging and extraction device for a nuclear power plant core measurement detector assembly, so as to save working time, reduce the number of workers and reduce the radiation dose.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A plug-in and pull-out assisting device for a core measuring detector assembly of a nuclear power plant comprises a metal rod, a lower metal sleeve, an upper metal sleeve, a spring, a metal handle, a metal connecting block, an eccentric metal rod, and a clamping metal groove; the lower metal sleeve and the upper metal sleeve are inserted into the metal rod, the upper metal sleeve is connected to the metal handle, the lower metal sleeve is connected to the upper metal sleeve, the spring is located inside the upper metal sleeve, the clamping metal groove is connected to the lower metal sleeve, and the two sides of the metal connecting block are respectively welded to the clamping metal groove and the outer side of the lower metal sleeve; the eccentric metal rod is fixed to the metal connecting block and connected to the clamping metal groove.

[0007] The upper metal sleeve and the metal handle are fixedly connected by cross welding.

[0008] The metal handle comprises a left and a right metal handle.

[0009] The left and right metal handles are separated and not connected in the middle.

[0010] The lower metal sleeve is connected with the upper metal sleeve through a nut.

[0011] The inner wall sides of the lower metal sleeve and the upper metal sleeve are paved with a first liner.

[0012] The clamping metal groove is connected with the lower metal sleeve through a metal pin.

[0013] The eccentric metal rod is fixed with the metal connecting block through a metal pin and connected with the clamping metal groove by welding.

[0014] A rubber liner is embedded on the inner wall of the clamping metal groove.

[0015] When working, first insert the lower metal sleeve and the upper metal sleeve into the metal rod; open the eccentric metal rod to drive the rubber gasket to open; fix the detector in the rubber gasket, and close the eccentric metal rod to fix the detector; apply upward or downward force to the metal handle to pull up or insert down the detector.

[0016] The beneficial effects achieved by the present invention are:

[0017] This invention is mainly used for plugging and unplugging core measurement detector components. The characteristics of this device are: 1) It can install and unplug the detector, which is very practical; 2) The operation is simple, saving a lot of installation and unplugging time; 3) The force can be controlled during the installation and plugging process to prevent damage to the detector; 4) It saves manpower and reduces the impact of radiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the present invention;

[0019] Figure 2 It is a top view schematic diagram of the present invention;

[0020] In the figure: 1. metal rod; 2. lower metal sleeve; 3. first gasket; 4. nut; 5. upper metal sleeve; 6. spring; 7. metal handle; 8. metal connecting block; 9. eccentric metal rod; 10. clamping metal groove; 11. metal pin; 12. scale; 13. detector; 14. rubber gasket. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 , Figure 2As shown, the plug-in and pull-out assisting device of the nuclear power plant core measuring detector assembly described in the present invention comprises a metal rod 1, a lower metal sleeve 2, a first gasket 3, a nut 4, an upper metal sleeve 5, a spring 6, a metal handle 7, a metal connecting block 8, an eccentric metal rod 9, a clamping metal groove 10, a metal pin 11, a scale 12, and a rubber gasket 14.

[0023] The metal rod 1 provides a supporting and fixing function for the tool. During use, the lower metal sleeve 2 and the upper metal sleeve 5 are inserted into the metal rod 1. The upper metal sleeve 5 is fixedly connected to the metal handle 7 by cross welding. The metal handle 7 includes left and right metal handles, which are separated and not connected in the middle. The lower metal sleeve 2 is connected to the upper metal sleeve 5 by a nut 4. The spring 6 is located inside the upper metal sleeve 5. The first gasket 3 is laid on the inner wall side of the lower metal sleeve 2 and the upper metal sleeve 5, which can be fixed more firmly to the metal rod 1. The clamping metal groove 10 is connected to the lower metal sleeve 2 by a metal pin 11. The two sides of the metal connection block 8 are respectively welded to the clamping metal groove 10 and the outer side of the lower metal sleeve 2. The eccentric metal rod 9 is fixed to the metal connection block 8 by a metal pin and connected to the clamping metal groove 10 by welding. The rubber gasket 14 is embedded in the inner wall of the clamping metal groove 10 and is the main component of the clamping detector.

[0024] When working, first insert the lower metal sleeve 2 and the upper metal sleeve 5 of the plug-in and extraction aid tool into the metal rod 1; open the eccentric metal rod 9 to drive the rubber gasket 14 to open; rotate the plug-in and extraction aid tool to fix the detector 13 in the rubber gasket 14, and close the eccentric metal rod 9 to fix the detector 13; apply an upward or downward force to the metal handle 7 to pull the detector up or insert it down. The scales on the lower metal sleeve 2 and the upper metal sleeve 5 are marking lines for force control. When the red line is crossed, it means that the force applied is large and the force needs to be reduced. The force applied within the red line scale can allow the detector 13 to be pulled out or inserted smoothly.

Claims

1. A plug-in and pull-out aid for a core measurement detector assembly of a nuclear power plant, characterized in that: It includes a metal rod, a lower metal sleeve, an upper metal sleeve, a spring, a metal handle, a metal connecting block, an eccentric metal rod, and a clamping metal groove; the lower metal sleeve and the upper metal sleeve are inserted into the metal rod, the upper metal sleeve is connected to the metal handle, the lower metal sleeve is connected to the upper metal sleeve, the spring is located inside the upper metal sleeve, the clamping metal groove is connected to the lower metal sleeve, and the two sides of the metal connecting block are respectively welded to the clamping metal groove and the outer side of the lower metal sleeve; the eccentric metal rod is fixed to the metal connecting block and is connected to the clamping metal groove; the metal handle includes left and right metal handles; a rubber gasket is embedded on the inner wall of the clamping metal groove.

2. The plug-in and pull-out aid device for a core measurement probe assembly of a nuclear power plant according to claim 1, characterized in that: The upper metal sleeve and the metal handle are fixedly connected by cross welding.

3. The plug-in and pull-out aid device for the core measurement probe assembly of a nuclear power plant according to claim 1, characterized in that: The left and right metal handles are separated and not connected in the middle.

4. The plug-in and pull-out aid device for a core measurement probe assembly of a nuclear power plant according to claim 1, characterized in that: The lower metal sleeve is connected with the upper metal sleeve via a nut.

5. The plug-in and pull-out aid device for a core measurement probe assembly of a nuclear power plant according to claim 1, characterized in that: The inner wall sides of the lower metal sleeve and the upper metal sleeve are paved with a first liner.

6. The plug-in and pull-out aid device for a core measurement probe assembly of a nuclear power plant according to claim 1, characterized in that: The clamping metal groove is connected with the lower metal sleeve through a metal pin.

7. The plug-in and pull-out aid device for a core measurement probe assembly of a nuclear power plant according to claim 1, characterized in that: The eccentric metal rod is fixed with the metal connecting block through a metal pin and connected with the clamping metal groove by welding.

8. The plug-in and pull-out aid device for a core measurement probe assembly of a nuclear power plant according to claim 1, characterized in that: When working, first insert the lower metal sleeve and the upper metal sleeve into the metal rod; open the eccentric metal rod to drive the rubber gasket to open; fix the detector in the rubber gasket, and close the eccentric metal rod to fix the detector; apply upward or downward force to the metal handle to pull up or insert down the detector.

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