Cable decontamination and detection device for nuclear power station

Abstract

The utility model relates to the technical field of nuclear decontamination and detection, and particularly discloses a cable decontamination and detection device for a nuclear power station, which comprises a rack base, a roller bracket mounted at the top of one end of the rack base, a crank mounted on the roller bracket through a bearing, a ratchet mounted on the crank, and a pawl mounted on the roller bracket and matched with the ratchet, a bearing is arranged on the roller support, a pawl is arranged on the roller support, a check block is arranged on one side of the pawl, one end of the crank penetrates through the bearing on the roller support to be connected with the roller, and one end of the roller is connected with the other side of the roller support through a connecting shaft and the bearing. Therefore, the cables with different diameters are decontaminated, and the surface contamination probe is used for detecting and judging whether the radiation dose exceeds the standard or not while the cables are decontaminated. Meanwhile, decontamination and detection functions are achieved, manpower is saved, and working efficiency is improved; a pure mechanical structure is adopted, manufacturing is simple, and maintenance is convenient; usage is convenient and popularization is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear decontamination and detection, in particular to a cable decontamination and detection device for a nuclear power plant. Background Art

[0002] In the nuclear field, one of the more common types is surface contamination of objects. As the contamination time increases, it mainly manifests as penetrating deep contamination (fixed contamination), combined tight contamination (weakly fixed contamination), and loose surface contamination. Although the difficulty of removing these types of surface contamination is gradually decreasing, the ease of contamination diffusion is gradually increasing. For example, although loose surface contamination is relatively easy to remove, it is easy for radioactive contamination to migrate during the movement, transportation, or related activities of the contaminated objects, and even form radioactive aerosols, thus posing great nuclear safety risks to the relevant environment or personnel. Therefore, the timely removal of such loose surface contaminants should be given more attention;

[0003] At present, common decontamination methods in nuclear power plants include sandpaper polishing, wiping with absorbent paper, etc., which are not only time-consuming and labor-intensive, but also have unsatisfactory effects. In particular, after cable items are contaminated, their decontamination and sorting work often requires a lot of manpower and material resources. In view of this problem, a cable decontamination and detection device for nuclear power plants is provided to achieve timely decontamination and detection of contaminated cable items in nuclear power plants, and reduce the pollution of radioactive pollutants to the environment and harm to personnel. Utility Model Content

[0004] The purpose of the utility model is to provide a cable decontamination and detection device for a nuclear power plant in view of the defects of the prior art, so as to solve the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cable decontamination and detection device for a nuclear power plant, comprising a frame base, a roller bracket is installed on the top of one end of the frame base, a crank is installed on the roller bracket through a bearing, a ratchet is installed on the crank, a pawl matching the ratchet is installed on the roller bracket through a connecting shaft, a stopper is fixedly installed on one side of the pawl, one end of the crank is connected to the roller through the bearing on the roller bracket, one end of the roller is connected to the other side of the roller bracket through a connecting shaft and a bearing, a clamp bracket is installed in the middle of the other end of the roller bracket, a stainless steel clamp is installed on the clamp bracket, absorbent paper is installed on the stainless steel clamp, probe brackets are installed on both sides of the middle of the frame base, and a surface contamination probe is installed on the top of the probe bracket.

[0006] As a preferred technical solution of the utility model, an elastic bayonet is installed on the top of the probe bracket, and the surface contamination probe is fixed to the probe bracket through the elastic bayonet.

[0007] As a preferred technical solution of the utility model, the two surface contamination probes are arranged opposite to each other.

[0008] As a preferred technical solution of the utility model, the clamp bracket, the probe bracket and the roller bracket are all welded to the frame base.

[0009] As a preferred technical solution of the utility model, a cable to be cleaned is passed through the middle of the absorbent paper, and one end of the cable to be cleaned is connected to the drum.

[0010] As a preferred technical solution of the present utility model, the surface contamination probe is a β surface contamination probe, model 6150.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the detection device can adjust the absorbent paper to wrap cables of different diameters by adjusting the stainless steel clamp, thereby achieving decontamination of cables of different diameters, and at the same time of decontamination of the cables, use the surface contamination probe to detect and determine whether the radiation dose exceeds the standard; it realizes the decontamination and detection functions at the same time, saves manpower and improves work efficiency; it adopts a purely mechanical structure, is simple to manufacture, and is easy to maintain; it is easy to use and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the cable decontamination and detection device of the utility model;

[0013] Figure 2 This is a schematic diagram of the frame base structure of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the stainless steel clamp of the utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the surface contamination probe of the utility model;

[0016] Figure 5 It is a structural schematic diagram of the roller of the utility model.

[0017] In the figure: 1. rack base, 2. clamp bracket, 3. stainless steel clamp, 4. absorbent paper, 5. probe bracket, 6. surface contamination probe, 7. roller bracket, 8. crank, 9. block, 10. pawl, 11. ratchet, 12. roller, 13. cable to be decontaminated. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0019] Example: Figures 1 to 5 As shown, the utility model discloses a cable decontamination and detection device for a nuclear power plant, which is composed of a frame base 1, a clamp bracket 2, a stainless steel clamp 3, absorbent paper 4, a probe bracket 5, a surface contamination probe 6, a roller bracket 7, a crank 8, a block 9, a pawl 10, a ratchet 11, a roller 12, etc. The frame part includes: a frame base 1, a clamp bracket 2, a probe bracket 5, and a roller bracket 7. The decontamination part includes: a stainless steel clamp 3 and absorbent paper 4. The detection part includes: a surface contamination probe 6. The winding and finishing part includes: a crank 8, a block 9, a pawl 10, a ratchet 11, and a roller 12. Among them, the clamp bracket 2, the probe bracket 5 and the roller bracket 7 can be welded and fixed on the frame base 1. The stainless steel clamp 3 is fixed to the top of the clamp bracket 2 by welding, and the absorbent paper 4 is placed on the inner side of the stainless steel clamp 3, and the cable to be decontaminated passes through the middle of the absorbent paper 4; the top of the probe bracket 5 is an elastic bayonet for placing the surface contamination probe 6, and when the cable passes through, the surface contamination probes 6 on both sides can measure the radiation dose of the cable; the roller 12 is arranged on the inner side of the roller bracket 7, and its rotation is driven by the outer crank 8, the ratchet 11 is fixed together with the crank 8 and rotates synchronously, the pawl 10 is arranged on the roller bracket 7, and is used in conjunction with the ratchet 8 to prevent the roller 12 from reversing. When reversal is required, the pawl 10 is moved to the block 9 and the crank 8 is rotated in the opposite direction.

[0020] Specific usage:

[0021] like Figure 1 As shown, first, open the stainless steel clamp 3, place absorbent paper 4 with a strong detergent inside it, pass the cable to be decontaminated through the absorbent paper 4 and fix one end on the roller 12, then adjust the diameter of the stainless steel clamp 3 to wrap the cable tightly, and finally turn the crank 8 to drive the roller 12 to rotate to achieve the winding of the cable. During the winding process, the contaminated cable will first pass through the decontamination part of the device. Since the stainless steel clamp 3 and the absorbent paper 4 wrap the cable tightly, the cable can be fully wiped and cleaned when it slides through the middle to achieve the purpose of decontamination. The decontaminated cable immediately enters the detection part of the device, and the surface contamination probe 6 is set at a suitable distance on both sides of the cable. When the cable passes the surface contamination probe 6, the β surface contamination probe is used to automatically detect whether the radiation dose exceeds the standard. If the detection is qualified, the crank 8 is continuously turned until the cable is completely decontaminated; if the dose exceeds the standard, the ratchet 10 needs to be moved to the block 9, and the crank 8 is turned in the opposite direction with one hand, and the cable is pulled out of the decontamination part of the device in the opposite direction with one hand, and then the decontamination work of this section of the cable with excessive dose is restarted until the final detection is qualified. In addition, the utility model can not only be used for decontamination of contaminated cables in nuclear power plants, but also for surface cleaning and arrangement of daily cables.

[0022] The above embodiments only express the implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A cable decontamination and detection device for a nuclear power plant, comprising a frame base (1), characterized in that: A roller bracket (7) is installed at the top of one end of the frame base (1), a crank (8) is installed on the roller bracket (7) through a bearing, a ratchet (11) is installed on the crank (8), a pawl (10) matching the ratchet (11) is installed on the roller bracket (7) through a connecting shaft, a stopper (9) is fixedly installed on one side of the pawl (10), one end of the crank (8) passes through the bearing on the roller bracket (7) and is connected to the roller (12), one end of the roller (12) is connected to the other side of the roller bracket (7) through the connecting shaft and the bearing, a clamp bracket (2) is installed in the middle of the other end of the roller bracket (7), a stainless steel clamp (3) is installed on the clamp bracket (2), and absorbent paper (4) is installed on the stainless steel clamp (3), and probe brackets (5) are installed on both sides of the middle of the frame base (1), and a surface contamination probe (6) is installed on the top of the probe bracket (5).

2. A cable decontamination and detection device for a nuclear power plant according to claim 1, characterized in that: An elastic bayonet is installed on the top of the probe bracket (5), and the surface contamination probe (6) is fixed on the probe bracket (5) via the elastic bayonet.

3. A cable decontamination and detection device for a nuclear power plant according to claim 2, characterized in that: The two surface contamination probes (6) are arranged opposite to each other.

4. A cable decontamination and detection device for a nuclear power plant according to claim 1, characterized in that: The clamp bracket (2), the probe bracket (5) and the roller bracket (7) are all welded to the frame base (1).

5. A cable decontamination and detection device for a nuclear power plant according to claim 1, characterized in that: A wire (13) to be decontaminated is passed through the middle of the absorbent paper (4), and one end of the wire (13) to be decontaminated is connected to the drum (12).

6. A cable decontamination and detection device for a nuclear power plant according to claim 1, characterized in that: The surface contamination probe (6) is a β surface contamination probe, model 6150.

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