A nuclear reactor neutron temperature measurement channel drawing tool

Abstract

A kind of nuclear reactor neutron temperature measurement channel drawing tool, including transmission part, sliding part, rack;Transmission part, sliding part are fixed on rack;Transmission part includes speed reducer, motor, motor is fixed on speed reducer;Roller both ends are fixed on bearing seat, gear box;Bearing seat is connected with gear box by roller support bar.This application replaces artificial realization neutron temperature measurement channel mechanical pull-out, can realize the simultaneous pull-out operation of three neutron temperature measurement channels, can realize the termination operation in pull-out operation according to demand, avoid the use of additional auxiliary installation tool, prevent the foreign matter of reactor core operation tool.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of nuclear power plant nuclear reactor maintenance tools, in particular to a nuclear power plant reactor neutron temperature measurement channel pulling tool. BACKGROUND

[0002] In the 163 groups of fuel assemblies in the reactor core of the 1-4 VVER unit reactor of the Tianwan nuclear power plant, according to the core monitoring requirements, 54 neutron temperature measurement channels are installed for real-time monitoring of the neutron flux density and coolant temperature of the reactor core. During normal operation of the unit, the 54 neutron temperature measurement channels are always installed in the core. During the overhaul of the unit, before the start of core unloading, manual pulling out of the neutron temperature measurement channels is carried out. The specific operation process is as follows: the workers lower 54 nylon ropes with 7.8-meter bound lifting lugs to the second platform of the protection tube assembly, and fix the tail end of the nylon rope at the first platform of the protection tube assembly. Workers go down to the second and third layers of the protection tube assembly transportation platform to fix the lifting lugs and nylon ropes on the neutron temperature measurement channel body. Personnel pull out the neutron temperature measurement channel by hand through the first and second platforms, and then fix the pulled-out measurement channel at the first layer of the protection tube assembly transportation platform.

[0003] In the process of manually pulling out the neutron temperature measurement channel, the following problems exist:

[0004] 1. The neutron temperature measurement channel is pulled out by manpower, and due to the high environmental dose, multiple groups of personnel are required to complete the work;

[0005] 2. In order to realize the fixation of the special lifting lug and the neutron temperature measurement channel, each lifting lug is fixed by three fixed bolts from three different directions, and there is a risk of loose fixation and foreign matter falling off;

[0006] 3. Personnel need to use 54 special lifting lugs to fix the 54 neutron temperature measurement channels, and each lifting lug has three fixed bolts, so to complete the fixation of all 54 neutron temperature measurement channels, 162 fixed bolts need to be fixed, which is relatively cumbersome and time-consuming for manual operation;

[0007] 4. In order to ensure the firm fixation of the lifting lug and the neutron temperature measurement channel, a special small wrench is used to tighten the fixed bolt, which has the risk of accidental falling of the special small wrench and generation of foreign matter;

[0008] 5. All fixed nylon ropes are scrapped after single use, generating a large amount of radioactive waste;

[0009] Through the summary feedback of the current neutron temperature measurement channel pulling, the above prominent problems need to be solved by taking optimization improvement measures, optimizing the pulling of the neutron temperature measurement channel, replacing the binding equipment, realizing the reuse of the binding equipment, and realizing the neutron temperature measurement channel pulling tool instead of manual operation. Therefore, a reactor neutron temperature measurement channel pulling tool is provided. SUMMARY

[0010] The purpose of the present application is to provide a nuclear reactor neutron temperature measurement channel pulling tool for installing in the pulling operation of the neutron temperature measurement channel of the reactor core.

[0011] The technical scheme of the present application is as follows: a nuclear reactor neutron temperature measurement channel pulling tool, comprising a transmission component, a sliding component and a rack; the transmission component and the sliding component are fixed on the rack;

[0012] The transmission component comprises a speed reducer and a motor, and the motor is fixed on the speed reducer; the both ends of the roller are fixed on the bearing seat and the gear box; the bearing seat and the gear box are connected through the roller support rod;

[0013] The intermediate shaft passes through the cylindrical gear A, the intermediate shaft middle shaft sleeve, the cylindrical gear B and the intermediate shaft outer shaft sleeve, and is fixed on the gear box and the gear box cover;

[0014] The proximal end rotating shaft of the roller is installed with the deep groove ball bearing, the gear box, the cylindrical gear A and the shaft gland, and is fixed on the gear box cover;

[0015] The head of the speed reducer passes through the speed reducer shaft sleeve, the gear box, the cylindrical gear B and the shaft gland, and is fixed on the gear box cover;

[0016] The rack comprises a vertical column rack, a horizontal support, a bottom plate, a vertical support and an inclined support, and the inclined support is located on both sides of the vertical support and is connected and fixed with the bottom plate; the vertical column rack is fixed on the bottom plate through the trapezoidal support plate, and the trapezoidal support plate has a rack on both sides; the cantilever is fixed on the vertical column rack through the cantilever support plate.

[0017] The both ends of the roller are fixed on the bearing seat and the gear box through the deep groove ball bearing.

[0018] The bearing seat and the gear box are connected through four roller support rods.

[0019] The intermediate shaft is fixed on the gear box and the gear box cover through the deep groove ball bearing.

[0020] The sliding component comprises a hexagonal bolt, and there are two hexagonal bolts in total; one passes through the gasket, the support spacer sleeve and is fixed on the pulley seat through the nut; the other hexagonal bolt passes through the gasket, the bearing spacer sleeve and the pulley and is fixed on the pulley seat.

[0021] Further comprising a transmission component support plate, the transmission component support plate is installed on the cantilever support plate.

[0022] The cantilever rotates 150 degrees around the installation hole of the cantilever support plate, the column frame rotates 90 degrees around the trapezoidal support plate, and the inclined support rotates 30 degrees around the two bottom plates.

[0023] Universal wheels are arranged on the inclined support and the horizontal support.

[0024] Screw directional standard feet are arranged on the inclined support and the horizontal support.

[0025] The significant effect of the present application is that:

[0026] 1. Replacing manual implementation of mechanical pulling out of the neutron temperature measurement channel;

[0027] 2. Simultaneous pulling out operation of three neutron temperature measurement channels can be realized;

[0028] 3. Work termination operation in the pulling out operation can be realized according to requirements;

[0029] 4. Steel cable is used to replace the existing pulling out rope, and reuse is realized;

[0030] 5. Avoiding the use of additional auxiliary installation tools, preventing the generation of foreign matters in the core operation tool;

[0031] 6. The joint action of multiple universal wheels avoids the universal wheels from sinking into the first platform of the protection tube assembly transportation platform. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a nuclear reactor neutron temperature measurement channel pulling tool of the present application;

[0033] Figure 2 It is a structural schematic diagram of a nuclear reactor neutron temperature measurement channel pulling tool frame of the present application;

[0034] Figure 3 It is an exploded structural schematic diagram of a nuclear reactor neutron temperature measurement channel pulling tool pulley component of the present application;

[0035] Figure 4 It is a structural schematic diagram of a nuclear reactor neutron temperature measurement channel pulling tool transmission component of the present application;

[0036] Figure 5 It is a schematic diagram of a nuclear reactor neutron temperature measurement channel pulling tool fixed on the first platform of the protection tube assembly transportation platform of the present application;

[0037] In the figure: shaft cover 1-1, speed reducer 1-2, motor 1-3, gear box 1-4, roller support rod 1-5, speed reducer shaft sleeve 1-6, cylindrical gear A 1-7, intermediate shaft middle shaft sleeve 1-8, cylindrical gear B 1-9, intermediate shaft outer shaft sleeve 1-10, bearing seat 1-11, deep groove ball bearing 1-12, gear box cover 1-13, roller 1-14, intermediate shaft 1-15,

[0038] Transmission component support plate 2-1, cantilever 2-2, cantilever support plate 2-3, column frame 2-4, horizontal support 2-5, bottom plate 2-6, vertical support 2-7, inclined support 2-8, universal wheel 2-9, trapezoidal support plate 2-10, frame 2-11, screw directional standard type foot 2-12,

[0039] Hexagonal bolt 3-1, gasket 3-2, bearing spacer 3-3, support spacer 3-4, pulley 3-5, pulley seat 3-6. DETAILED DESCRIPTION

[0040] A nuclear reactor neutron temperature measurement channel drawing tool, comprising a transmission component 1, a sliding component 3, a frame 2; the transmission component 1 is fixed on the transmission component support plate 2-1 of the frame 2; the sliding component 3 is fixed on the cantilever 2-2 of the frame 2;

[0041] The motor 1-3 is fixed on the speed reducer 1-2, and is fixed on the gear box together, wherein the motor 1-3 has a power-off brake protection function, which can be used for emergency stop of work; the two ends of the roller 1-14 are fixed on the bearing seat 1-11 and the gear box 1-4 through deep groove ball bearings 1-12 respectively, and the groove on the roller is a guide ring, which can make the rope orderly distributed on the roller shell when the roller rotates, avoiding the overlapping of the rope; the bearing seat 1-11 and the gear box 1-4 are connected by four roller support rods 1-5.

[0042] The cylindrical gear A 1-9, the intermediate shaft middle shaft sleeve 1-8, the cylindrical gear B 1-7, and the intermediate shaft outer shaft sleeve 1-10 are sequentially fixed on the gear box 1-4 and the gear box cover 1-13 by the deep groove ball bearing 1-12 through the intermediate shaft 1-15.

[0043] The proximal end rotating shaft of the roller 1-14 is sequentially installed with the deep groove ball bearing 1-12, the gear box 1-4, the cylindrical gear 50*1.51-9, the shaft cover 1-1, and is fixed on the gear box cover 1-13.

[0044] The head of the speed reducer 1-2 sequentially passes through the speed reducer shaft sleeve 1-6, the gear box 1-4, the cylindrical gear B 1-7, the shaft cover 1-1, and is fixed on the gear box cover 1-13.

[0045] The connection between the shaft and the gear is a key connection.

[0046] The hexagonal bolt 3-1 passes through the gasket 3-2, the support spacer 3-4 in sequence, and is fixed to the pulley seat 3-6 through a nut, so as to prevent the steel wire rope from falling off; another hexagonal bolt 3-1 passes through the gasket 3-2, the bearing spacer 3-3, the pulley 3-5 in sequence, and is fixed to the pulley seat 3-6 through a nut.

[0047] The two inclined supports 2-8 are located on both sides of the longitudinal support 2-7, are connected and fixed with the upper and lower bottom plates 2-6 through bolts, so that the nuclear reactor neutron temperature measurement channel drawing tool forms a lower stable structure;

[0048] The column frame 2-4 is fixed on the bottom plate 2-6 through the left and right two trapezoidal support plates 2-10, and each of the two trapezoidal support plates 2-10 has a frame 2-11 on the two sides;

[0049] The cantilever 2-2 is fixed on the column frame 2-4 in dependence on the cantilever support plates 2-3 on both sides;

[0050] The cantilever 2-2 rotates 150 degrees around the mounting hole of the cantilever support plate 2-3, the column frame 2-4 rotates 90 degrees around the trapezoidal support plate 2-10, and the inclined support 2-8 rotates 30 degrees around the two bottom plates 2-6, so as to fold the frame for transportation;

[0051] Eight universal wheels 2-9 are arranged on the inclined support 2-8 and the horizontal support 2-5, so as to facilitate flexible movement of the nuclear reactor neutron temperature measurement channel drawing tool; for example, there are multiple holes on the first platform of the protection tube assembly transportation platform, and even if one or two universal wheels are sunk into the hole of the first platform, it does not affect the pushing of the drawing tool by the staff;

[0052] The inclined support 2-7 and the horizontal support 2-5 are each provided with a screw directional standard type foot 2-12, the nut on the foot is rotated, and through the cooperation of the bolt and the nut, the screw directional standard type foot 2-12 can be moved downward, and the nuclear reactor neutron temperature measurement channel drawing tool can be fixed on the first platform through the fixed mounting frame 4.

[0053] The drawing method of the nuclear reactor neutron temperature measurement channel drawing tool specifically includes the following steps:

[0054] Step 1: transport the folded nuclear reactor neutron temperature measurement channel drawing tool to the first platform of the reactor protection tube assembly transportation platform;

[0055] Step 2: open the folded tool, since there are eight universal wheels at the bottom, the staff can easily push the drawing tool to the designated position;

[0056] Step 3: By rotating the nut on the directional standard foot of the inclined support and the horizontal support, the screw rod directional standard foot can be lowered, and the nuclear reactor neutron temperature measurement channel pulling tool can be fixed on the protection tube assembly transport platform first platform through the fixed mounting frame 4;

[0057] Step 4: The motor is powered on and runs, the appropriate torque is achieved through the reducer, and then the drum runs through the transmission of the gear box, the drum shell is wound with a rope, the other end of the rope is lapped on the pulley of the pulley component, and then the pulling force is generated through the rope to realize the pulling out of the neutron temperature measurement channel.

[0058] In summary, the special pulling tool is designed to realize the quick completion of the neutron temperature measurement channel pulling out, while ensuring the firmness and anti-dropping measures of the pulling tool. The neutron temperature measurement channel is pulled out mechanically, which can effectively reduce the collective dose level of the working group, and realize the reasonable and feasible radiation protection as low as possible.

Claims

1. A nuclear reactor neutron temperature measurement channel pulling tool, characterized by: It comprises a transmission component (1), a sliding component (3), and a frame (2); the transmission component (1) and the sliding component (3) are both fixed on the frame (2); The transmission component (1) includes a reducer (1-2) and a motor (1-3), wherein the motor (1-3) is fixed on the reducer (1-2); both ends of the roller (1-14) are fixed on a bearing seat (1-11) and a gear box (1-4); the bearing seat (1-11) and the gear box (1-4) are connected via a roller support rod (1-5); The intermediate shaft (1-15) passes through the cylindrical gear A (1-9), the intermediate shaft middle sleeve (1-8), the cylindrical gear B (1-7), the intermediate shaft outer sleeve (1-10), and is fixed to the gear box (1-4) and the gear box cover (1-13); The proximal rotating shaft of the roller (1-14) is installed with a deep groove ball bearing (1-12), a gear box (1-4), a cylindrical gear A (1-9), and a shaft pressure cover (1-1), and is fixed on the gear box cover (1-13); The head of the reducer (1-2) passes through the reducer sleeve (1-6), the gear box (1-4), the cylindrical gear B (1-7), the shaft pressure cover (1-1), and is fixed on the gear box cover (1-13); The frame (2) includes a column frame (2-4), a transverse support (2-5), a base plate (2-6), a longitudinal support (2-7), and an oblique support (2-8). The oblique support (2-8) is located on both sides of the longitudinal support (2-7) and is connected and fixed to the base plate (2-6). The column frame (2-4) is fixed to the base plate (2-6) through a trapezoidal support plate (2-10). There are frames (2-11) on both sides of the trapezoidal support plate (2-10). The cantilever (2-2) is fixed to the column frame (2-4) through a cantilever support plate (2-3). The sliding component (3) includes two hexagonal bolts (3-1), one of which passes through a gasket (3-2) and a support sleeve (3-4) and is fixed to a pulley seat (3-6) via a nut; and the other hexagonal bolt (3-1) passes through a gasket (3-2), a bearing sleeve (3-3), a pulley (3-5), and is fixed to the pulley seat (3-6).

2. A nuclear reactor neutron temperature measurement channel pulling tool according to claim 1, characterized in that: Both ends of the roller (1-14) are fixed on the bearing seat (1-11) and the gear box (1-4) through deep groove ball bearings (1-12).

3. A nuclear reactor neutron temperature measurement channel pulling tool according to claim 1, characterized in that: The bearing seat (1-11) and the gear box (1-4) are connected via four roller support rods (1-5).

4. A nuclear reactor neutron temperature measurement channel pulling tool according to claim 1, characterized in that: The intermediate shaft (1-15) is fixed to the gear box (1-4) and the gear box cover (1-13) through a deep groove ball bearing (1-12).

5. A nuclear reactor neutron temperature measurement channel pulling tool according to claim 1, characterized in that: It also includes a transmission component support plate (2-1), which is mounted on the cantilever support plate (2-3).

6. A nuclear reactor neutron temperature measurement channel pulling tool according to claim 1, characterized in that: The cantilever (2-2) rotates 150 degrees around the mounting hole of the cantilever support plate (2-3), the column frame (2-4) rotates 90 degrees around the trapezoidal support plate (2-10), and the oblique support (2-8) rotates 30 degrees around the two bottom plates (2-6).

7. A nuclear reactor neutron temperature measurement channel pulling tool according to claim 1, characterized in that: Universal wheels (2-9) are provided on the oblique support (2-8) and the transverse support (2-5).

8. The nuclear reactor neutron temperature measurement channel pulling tool according to claim 1, characterized in that: The oblique support (2-8) and the transverse support (2-5) are both provided with screw-rod directional standard footings (2-12).

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