CN115117715B

CN115117715B - Instrument control cable dismounting device

Info

Publication number: CN115117715B
Application number: CN202211023565.2A
Authority: CN
Inventors: 杨强; 刘昶; 张葛祥; 郭德全; 宋纾崎
Original assignee: Chengdu University of Information Technology
Current assignee: Chengdu University of Information Technology
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-11-08
Anticipated expiration: 2042-08-25
Also published as: CN115117715A

Abstract

An instrument control cable dismounting device comprises a movement mechanism and a bolt loosening mechanism; the bolt unscrewing mechanism consists of a fixed shaft, a shell locking structure, a main shell, an auxiliary shell, a shell gear and an operation member; the main shell and the auxiliary shell rotate around the fixed shaft, and the shells can be combined and separated; the operation component mainly comprises a locking buckle, a telescopic rod, a spring rod, an operation tool end and a spring. After the shell is locked, the upper end face of the operation component is pressed down, the spring is pressed to deform, and meanwhile, the telescopic rod descends; the operation rod rotates gradually to form a 90-degree relative position with the telescopic rod, the operation tool end moves together with the operation rod until the operation tool end is in close contact with the bolt connecting position, the locking buckle is inserted into the clamping groove in the side face of the end cover, and the clamping of the target bolt position is completed. The movement mechanism is used for driving the shell gear to enable the shell to rotate. The invention assists manual operation and improves the working efficiency of removing or installing the instrument control cable joint.

Description

Instrument control cable dismounting device

Technical Field

The invention relates to the technical field of mechanical equipment, in particular to an instrument control cable dismounting device.

Background

During maintenance of a nuclear power plant VVER type unit, the assembly and disassembly of a nuclear reactor top instrumentation cable connector is one of the critical operating paths for unit maintenance. And (4) manually descending to a reactor vertical shaft, and dismantling and installing instrument control cable joints at the cement wall side and the control rod driving mechanism side 301, wherein the total number of operation objects is 206.

The disassembly, assembly and maintenance problems of certain components in the domestic nuclear power station unit still need to be manually carried out by operating personnel, and under the operation of high temperature and nuclear radiation in a narrow environment, the maintenance efficiency is low, and safety accidents are easy to happen. Because the operating personnel need to wear the sealing paper clothes protective clothing and continuously work for hours in a high-temperature narrow environment containing trace radiation, the safety accidents that the heat stroke and the nuclear radiation dose of the personnel exceed the standard easily occur.

At present, there is no device that can assist the manual completion of removing and installing the reactor top instrumentation control cable.

Disclosure of Invention

The invention aims to provide an instrument control cable dismounting device which can assist operators in completing dismounting of instrument control cables, reduce maintenance time and personnel turns and avoid potential safety hazards of heatstroke and excessive nuclear radiation dose of personnel.

The technical scheme for realizing the purpose of the invention is as follows:

an instrument control cable dismounting device comprises a movement mechanism and a bolt loosening mechanism; the bolt unscrewing mechanism comprises a main shell and a main operation member, and further comprises an auxiliary shell and an auxiliary operation member; the main operation component and the auxiliary operation component have the same structure; the main operation component comprises a telescopic rod and an operation rod; the upper end of the telescopic rod is provided with a locking buckle, and the lower end of the telescopic rod is provided with a spring rod for sleeving the upper part of the spring; the rear end of the operation rod is connected to the lower half part of the telescopic rod through a shaft, so that the operation rod rotates up and down on the side surface of the telescopic rod by taking the shaft as a center; the front end of the operating rod is also connected with an operating tool end; two side edges of the main shell are of concave-convex structures, and two side edges of the auxiliary shell are also of concave-convex structures and respectively correspond to two side edges of the main shell; the concave-convex structures on one corresponding side of the main shell and the auxiliary shell are connected through a fixed shaft, so that the concave-convex structures on the other corresponding side of the main shell and the auxiliary shell are combined or separated, and the concave-convex structures on the other corresponding side are locked by the shell locking structure after combination; the outer sides of the main shell and the auxiliary shell also comprise outer teeth; the upper ends of the main shell and the auxiliary shell are also provided with upper end surfaces, and the upper end surfaces are provided with through holes for sleeving telescopic rods and clamping grooves matched with the locking buckles; the lower parts of the inner sides of the main shell and the auxiliary shell are also provided with arc-shaped bottom plates, and the arc-shaped bottom plates are provided with non-through holes for sleeving the lower ends of the spring rods and the lower parts of the springs; the inner side of the arc-shaped bottom plate is also provided with a convex part for supporting the operation rod to rotate from bottom to top; when the main shell and the auxiliary shell are combined and locked, an integral shell is formed, the cross section of the integral shell is a circular ring, and all external teeth of the main shell and the auxiliary shell form a shell gear; after the main operation component and the auxiliary operation component are respectively sleeved on the main shell and the auxiliary shell and locked, the operation rod of the main operation component and the operation rod of the auxiliary operation component are bilaterally symmetrical by using the central axis of the whole shell and are parallel to the central axis, and the end of the operation tool faces the central axis; the movement mechanism is used for driving the shell gear, so that the integral shell rotates by taking the central axis of the integral shell as a center.

According to the preferred technical scheme, the motion mechanism comprises a servo motor, a coupler, a rolling bearing, a bevel gear train reducer, a planetary gear train reducer and a straight-tooth cylindrical gear which are sequentially connected; the straight toothed spur gear is a torque output component of a motion mechanism driving shell gear.

Compared with the prior art that the instrument control cable dismounting operation is finished purely manually, the instrument control cable dismounting device provided by the invention assists in manual operation, improves the working efficiency of dismounting or mounting the instrument control cable joint, and reduces the working risk of operating personnel in a high-temperature environment containing trace radiation.

Drawings

FIG. 1 is a schematic flow chart of the process.

Fig. 2 is a schematic diagram of the construction of an instrumentation cable.

Fig. 3 is a schematic structural view of the movement mechanism.

FIG. 4 is a schematic view of the bevel gear system reducer of the motion mechanism.

Fig. 5 is a schematic structural diagram of a planetary gear train reducer of the motion mechanism.

Fig. 6 is a plan view of the bolt unscrewing mechanism.

Fig. 7 is a perspective view of the bolt loosening mechanism.

Fig. 8 is a schematic structural view of the housing locking structure.

Fig. 9 is a schematic structural view of the structure of the working member.

Fig. 10 is a schematic structural view of the main casing and the sub-casing in an uncombined state.

FIG. 11 is a schematic view of the instrument control cable dismounting device dismounting working condition cable.

The figures are labeled as follows: the cable comprises a cable section 01, a cable joint 02, a bolt connecting position 03, a cable base 04, a protective sleeve 05 and a protective sleeve base 06; the moving mechanism 1 and the bolt loosening mechanism 2; a servo motor 11, a coupler 12, a rolling bearing 13, a bevel gear train reducer 14, a planetary gear train reducer 15, a spur gear 16, a sleeve 17 and a round nut 18; a coupling input shaft 141, a small bevel gear 142, a large bevel gear 143, a planetary gear train input shaft 144; a sun gear 152, a planet gear 153, an outer ring gear 154, a planet carrier 155, an output shaft 156; a fixed shaft 21, a housing locking structure 22, a main housing 23, a sub-housing 24, a housing gear 25, an operating member 26; a slide rail box 221, a connection rail plate 222, a lock shaft 223; locking buckle 261, telescopic rod 262, spring rod 263, working rod 264, working tool end 265 and spring 266; upper end 281, transmission connection surface 282, and arc bottom plate 283.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

As shown in FIG. 2, the dismounting and mounting object of the invention is a CPS power coil self-carrying cable which mainly comprises a cable section 01, a cable joint 02, a bolt connecting position 03, a cable base 04, a protective sleeve 05 and a protective sleeve base 06. The protective sleeve is arranged in a reactor shaft, and a protective sleeve 05 and a protective sleeve base 06 are arranged outside the instrument control cable.

As shown in fig. 3, the motion mechanism 1 mainly includes a servo motor 11, a coupling 12, a rolling bearing 13, a bevel gear reducer 14, a planetary gear reducer 15, a spur gear 16, a sleeve 17, and a round nut 18. The servo motor 11 provides device working torque, the rotating speed is reduced through the coupling 12, the torque is increased through the bevel gear train reducer 14 and the planetary gear train reducer 15, and finally the torque is transmitted to the straight spur gear 16 to reach an output torque value.

As shown in fig. 4, the bevel gear reducer 14 is composed of a coupling input shaft 141, a small bevel gear 142, a large bevel gear 143, and a planetary gear train input shaft 144. The servo motor 11 transmits torque to the coupling input shaft 141 through the coupling 12, the coupling input shaft 141 is connected with the small bevel gear 142 to rotate, the small bevel gear 142 is meshed with the large bevel gear 143 to rotate, the torque rotating direction is changed from transverse to longitudinal transmission, and the planetary gear train input shaft 144 provides 10.2N

m, of the torque.

As shown in FIG. 5, the planetary gear reducer 15 is composed of a sun gear 152, a planetary gear 153, an outer ring gear 154, a planetary carrier 155, and an outputA shaft 156. The planetary gear train input shaft 144 is connected to the sun gear 152, and the sun gear 152, the planetary gears 153, the outer ring gear 154, and the carrier 155 constitute a planetary gear train. The planetary gear train transmission comprises 3 planetary gears and 1 sun gear, wherein the 3 planetary gears are more balanced and more stable in the transmission process. The output shaft 156 provides 30.6N

m, of the torque.

The movement mechanism 1 shown in fig. 3, 4 and 5 is only a preferred embodiment, and other configurations of movement mechanisms may be used in practice.

As shown in fig. 6, the plan view of the bolt loosening mechanism 2 preliminarily shows that the bolt loosening mechanism includes a housing lock structure 22, a main housing 23, a sub-housing 24, a housing gear 25, and an operating member 26.

As shown in fig. 7, the bolt loosening mechanism 2 is composed of a fixed shaft 21, a housing locking structure 22, a main housing 23, a sub-housing 24, a housing gear 25, and an operating member 26. The main shell 23 and the auxiliary shell 24 rotate around the fixed shaft 21, the shells can complete the merging and separating states, so that the cable section 01 is entered, the longitudinal distance between the protective sleeve 05 and the bolt connecting position 03 is the same as the height of the shells, and the upper surface of the shells and the top surface of the protective sleeve 05 are in the same plane, so that the positioning of the operation position is completed.

As shown in fig. 8, the housing locking structure 22 is mainly composed of a slide rail box 221, a connection rail plate 222, and a locking shaft 223. The connecting rail plate 222 connects rails near the end of the sliding rail box 221 to move up and down longitudinally, and near the end of the locking shaft 223, the locking shaft 223 is used to connect the rectangular interface between the main housing 23 and the sub-housing 24 by moving up and down, so as to complete the housing locking.

As shown in fig. 9, the working member 26 is mainly composed of a locking buckle 261, an expansion link 262, a spring lever 263, a working lever 264, a working tool end 265, and a spring 266. After the locking of the housing is completed, the upper end face of the working member 26 is pressed down, the spring 266 is pressed and deformed, and the telescopic rod 262 descends; the working rod 264 rotates gradually to form a 90-degree relative position with the telescopic rod 262, the working tool end 265 moves together with the working rod 264 until the working tool end 265 is in close contact with the bolt connection position 03, the locking buckle 261 is inserted into a clamping groove in the side face of the end cover, and the clamping of the target bolt position is completed.

As shown in fig. 10, the housing portion is mainly composed of a main housing 23, a sub-housing 24, an upper end surface 281, a transmission connecting surface 282, and an arc-shaped bottom plate 283. The main casing 23 and the sub-casing 24 are combined and separated by the fixing shaft 21. A clamping groove is formed in the side face of the upper end face 281 and used for locking the clamping buckle 261 to fix the clamping state of the operation component 26; the upper surface is provided with a through hole for mounting the spring rod 263. The transmission connecting surface 282 is welded to the lower surface of the housing gear 25, and the positions of the two preset holes are the same, so that the locking shaft 223 is conveniently connected with the rectangular interface between the main housing 23 and the auxiliary housing 24. The upper surface of the arc-shaped bottom plate 283 is provided with a hole for installing the spring rod 263 and the spring 266, so that the hole is a non-through hole; the arc-shaped bottom plate 283 is a rectangular plate pointing to the circle center of the housing and is used for abutting against the working component 26, thereby preventing the working rod 264 from being deviated and the working tool end 265 from being in place.

As shown in fig. 11, the instrumentation and control cable is located inside the protective sleeve 05 and the protective sleeve base 06, and the dismounting device provides torque through the movement mechanism 1 to drive the bolt loosening mechanism 2 to rotate. The working tool end 265 of the working member 26 in the bolt loosening mechanism 2 is in close contact with the bolt connection position 03, and the removal and installation processes of the instrumentation cable joint are completed through the interactive friction force.

When in use, referring to fig. 1, the method specifically comprises the following steps:

1. the operator carries out on-site preparation and inspection on the instrument control cable dismounting device designed by the invention. Checking the pile top environment, field lines and safety protection measures; the dismounting device is checked and debugged to ensure no error.

2. Separate main casing 23 and sub-casing 24 and enter into cable section 01 position, rely on casing self height to fix a position with protective sleeve 05 and bolted connection position 03 longitudinal distance the same, utilize the rectangle interface between locking axle 223 connection main casing 23 and the sub-casing 24 through reciprocating, accomplish the casing and lock, operation tool end 265 and bolted connection position 03 in close contact with, locking buckle 261 inserts in the end cover side draw-in groove, the completion is pressed from both sides tightly.

3. It is ensured whether the housing locking structure 22 and the locking catch 261 loosen, and whether the work tool end 265 clamps the bolt connection location 03.

4. When the switch of the servo motor 11 is started, the coupler 12, the bevel gear train reducer 14, the planetary gear train reducer 15 and the straight-tooth cylindrical gear 16 rotate anticlockwise, and the bolt unscrewing mechanism 2 rotates along with the anticlockwise rotation, so that the cable joint 02 is unscrewed and removed. The lock shaft 223 moves upward to release the locked state between the main housing 23 and the sub-housing 24, and the lock hook 261 disengages from the end cover side hook groove to release the clamped state of the work tool end 265. And pulling out the cable joint 02 to finish the dismantling work of the instrument control cable. In the same way, the bolt connection 03 is not fastened after the replacement of a new cable connection. The servo motor 11 is started reversely, the movement mechanism 1 rotates clockwise, the cable joint 02 is screwed, and installation work of the instrument control cable is completed.

Claims

1. An instrument control cable dismounting device is characterized by comprising a movement mechanism (1) and a bolt loosening mechanism (2); the bolt unscrewing mechanism (2) comprises a main shell (23) and a main operation component, and also comprises an auxiliary shell (24) and an auxiliary operation component; the main operation component and the auxiliary operation component have the same structure; the main operation component comprises an expansion rod (262) and an operation rod (264); the upper end of the telescopic rod (262) is provided with a locking buckle (261), and the lower end is provided with a spring rod (263) for sleeving the upper part of the spring (266); the rear end of the working rod (264) is connected to the lower half part of the telescopic rod (262) through a shaft, so that the working rod (264) rotates up and down on the side surface of the telescopic rod (262) by taking the shaft as a center; the front end of the working rod (264) is also connected with a working tool end (265); two sides of the main shell (23) are of concave-convex structures, two sides of the auxiliary shell (24) are of concave-convex structures, and the concave-convex structures correspond to the two sides of the main shell (23) respectively; the concave-convex structures of one mutually corresponding side of the main shell (23) and the auxiliary shell (24) are connected through a fixed shaft (21), so that the concave-convex structures of the other mutually corresponding side of the main shell (23) and the auxiliary shell (24) are combined or separated, and the concave-convex structures of the other mutually corresponding side are locked by the shell locking structure (22) after combination; the outer sides of the main shell (23) and the auxiliary shell (24) also comprise external teeth; the upper ends of the main shell (23) and the auxiliary shell (24) are also provided with upper end surfaces (281), and the upper end surfaces (281) are provided with through holes for sleeving telescopic rods (262) and clamping grooves matched with the locking buckles (261); the lower parts of the inner sides of the main shell (23) and the auxiliary shell (24) are also provided with arc-shaped bottom plates (283), and the arc-shaped bottom plates (283) are provided with non-through holes for sleeving the lower ends of the spring rods (263) and the lower parts of the springs (266); the inner side of the arc-shaped bottom plate (283) is also provided with a convex part for supporting the operation rod (264) to rotate from bottom to top; when the main shell (23) and the auxiliary shell (24) are combined and locked, an integral shell is formed, the cross section of the integral shell is a circular ring, and all external teeth of the main shell (23) and the auxiliary shell (24) form a shell gear (25); after the main operation component and the auxiliary operation component are respectively sleeved on the main shell (23) and the auxiliary shell (24) and locked, the operation rod (264) of the main operation component and the operation rod of the auxiliary operation component are bilaterally symmetrical by the central axis of the whole shell and are parallel to the central axis, and the operation tool end (265) faces the central axis; the movement mechanism (1) is used for driving the shell gear (25) so that the integral shell rotates by taking the central axis of the integral shell as a center.

2. The instrument control cable dismounting device according to claim 1, wherein the movement mechanism (1) comprises a servo motor (11), a coupler (12), a rolling bearing (13), a bevel gear train reducer (14), a planetary gear train reducer (15) and a spur gear (16) which are connected in sequence; the straight toothed spur gear (16) is a torque output component of the movement mechanism (1) driving shell gear (25).