CN216719510U

CN216719510U - Choke plug assembly underwater operation tool transmission device for nuclear power station

Info

Publication number: CN216719510U
Application number: CN202123412854.5U
Authority: CN
Inventors: 郑俊彦; 许显春; 马超
Original assignee: Wuxi Zhonghe Electric Equipment Co ltd
Current assignee: Wuxi Zhonghe Electric Equipment Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-10
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a transmission device of an underwater operation tool of a choke plug component for a nuclear power station, which comprises a transmission pipe, a spring cap, a spring, a bolt, a cylindrical pin, a crank shaft, a locking plate, a first bearing, a shifting finger, a shifting fork and a third bearing. The utility model has simple and reliable structure, can effectively transmit the transmission action to the gripping device, ensures that the gripping device can effectively and reliably grip the choke plug assembly, and ensures the effectiveness and the reliability of the transmission process.

Description

Choke plug assembly underwater operation tool transmission device for nuclear power station

Technical Field

The utility model relates to the field of components for nuclear reactors, in particular to a transmission device for an underwater operation tool of a choke plug component for a nuclear power station.

Background

The pressurized water reactor is a reactor type with mature technology, safe operation, economy and practicability. Internationally, the installed total capacity of a pressurized water reactor nuclear power plant accounts for more than 60% of the total capacity of various reactors of all nuclear power plants; the pressurized water reactor type accounts for more than 90% of the nuclear power units which are put into commercial operation and are being built in China at present. Pressurized water reactors utilize pressurized light water as a reactor coolant and a moderator to convert heat energy generated by nuclear fission into electric energy for human use.

The core of the pressurized water reactor is composed of a fuel assembly and related assemblies, wherein the fuel assembly generally comprises structures such as fuel rods, guide pipes, instrument pipes, spacer grids and the like, and the related assemblies can be subdivided into control rod assemblies, burnable poison assemblies, neutron source assemblies, choke plug assemblies and the like. The fuel rods mainly contain fuel components required for maintaining fission reaction, and in-pile probes can be placed in the instrument tube cells. Control rod assemblies, burnable poison assemblies, or neutron source assemblies can be placed as desired in the guide tubes, and for empty guide tubes not loaded with such assemblies, choke plug assemblies are inserted to avoid coolant bypass.

The gripper of the choke plug assembly of the nuclear power station is a special gripper used for gripping, releasing and lifting the choke plug assembly, and has the function of extracting the choke plug assembly from one fuel assembly and safely and stably inserting the choke plug assembly into other fuel assemblies. The gripper for the choke plug assembly of the nuclear power station is used in a spent fuel storage pool, the whole process of gripping the choke plug assembly is carried out underwater, the gripper is operated by a crane of the spent fuel storage pool during use, and the gripper is stored on a combined support of a fuel operation tool after use.

The utility model discloses a utility model patent application number CN200920004083.6 discloses a choked flow stopper subassembly gripping apparatus, including upper segment part, hypomere part, the hypomere part is including locking uide sleeve, running gear, positioner, and the top of upper segment part is equipped with the davit, is equipped with the hoist device in the last davit, and the hoist device passes through hoisting wire rope and establishes the interior operating element of lower davit in the upper segment part lower part and be connected. However, the patent does not relate to a specific transmission assembly structure, and the effectiveness and the reliability of the transmission process cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a transmission device of an underwater operation tool of a choke plug assembly for a nuclear power station, which has a simple and reliable structure, and can effectively transmit transmission action to a grabbing device, so that the grabbing device can effectively and reliably grab the choke plug assembly.

In order to realize the purpose, the utility model adopts the technical scheme that:

a choke plug component underwater operation tool transmission device for a nuclear power station comprises a transmission pipe, a spring cap, a spring, a bolt, a cylindrical pin, a crank shaft, a locking plate, a first bearing, a shifting finger, a shifting fork and a third bearing, wherein the locking plate is fixed on a supporting pipe of the choke plug component underwater operation tool for the nuclear power station, the locking plate is provided with the first bearing and is provided with a locking hole and an unlocking hole, the crank shaft is positioned above the locking plate, the shaft of the crank shaft is connected with the first bearing, the crank of the crank shaft is connected with the spring cap, the spring is arranged in the spring cap, the bolt penetrates through the crank of the spring cap, the spring and the crank shaft and then is inserted into the locking hole or the unlocking hole at the bottom, the cylindrical pin is arranged at the top of the bolt, the top of the transmission pipe is connected with the first bearing, the bottom of the transmission pipe is connected with the third bearing, and the third bearing is fixed on a square frame end cover of the choke plug component underwater operation tool for the nuclear power station, the lower end of the transmission pipe is provided with a shifting fork, the upper end of the inner pipe is provided with a shifting finger matched with the shifting fork, and the shifting finger is inserted into the shifting fork.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model provides a transmission device of an underwater operation tool of a choke plug assembly for a nuclear power station, which utilizes a crank shaft to simultaneously drive a bolt and a transmission pipe to rotate, the transmission pipe drives a shifting fork and a shifting finger to rotate, the shifting finger drives an inner pipe to drive a grabbing device at the bottom of the inner pipe to rotate, the bolt is inserted into a locking hole or an unlocking hole, and the corresponding grabbing device rotates to a locking position or an unlocking position. The utility model has simple and reliable structure, can effectively transmit the transmission action to the gripping device, ensures that the gripping device can effectively and reliably grip the choke plug assembly, and ensures the effectiveness and the reliability of the transmission process.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model.

In the drawings:

FIG. 1 is a schematic view of the principal structure of the marine operating tool transmission of the choke plug assembly for a nuclear power plant of the present invention;

FIG. 2 is a schematic view of the overall configuration of a subsea operation tool for a nuclear power plant choke plug assembly;

FIG. 3 is a view B-B of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 2 at II;

FIG. 5 is a view A-A of FIG. 2;

FIG. 6 is an enlarged partial view of the positioning and gripping devices of the underwater operating tool of the choke plug assembly for a nuclear power plant;

FIG. 7 is a schematic view of the bayonet shapes on the outer and inner sleeves of FIG. 6;

in the figure: 1-upper boom, 2-outer tube, 3-locking assembly, 4-guide sleeve, 5-support tube, 6-drive tube, 7-square frame, 8-running gear, 9-first T-groove, 10-second T-groove, 11-bottom plate, 12-inner tube, 13-positioning plate, 14-spring cap, 15-spring, 16-bolt, 17-cylindrical pin, 18-crank shaft, 19-locking plate, 20-first bearing, 22-upper travel block, 23-third T-groove, 24-second bearing, 25-square frame end cover, 26-boom, 27-travel hole, 28-suspension plate, 34-thumb, 35-fork, 36-third bearing, 47-pin shaft, 61-outer sleeve, 62-end cover, 63-inner sleeve, 64-distance tube, 65-positioning pin, 66-supporting pin, 67-flow blocking plug pressing piece and 68-bayonet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1-4, the utility model provides a transmission device for an underwater operation tool of a choke plug assembly for a nuclear power station, which comprises a transmission pipe 6, a spring cap 14, a spring 15, a bolt 16, a cylindrical pin 17, a crank shaft 18, a locking plate 19, a first bearing 20, a shifting finger 34, a shifting fork 35 and a third bearing 36, wherein the locking plate 19 is fixed on a support pipe 5 of the underwater operation tool of the choke plug assembly for the nuclear power station, the locking plate 19 is provided with the first bearing 20 and is provided with a locking hole and an unlocking hole, the crank shaft 18 is positioned above the locking plate 19, a shaft of the crank shaft 18 is connected with the first bearing 20, a crank of the crank shaft 18 is connected with the spring cap 14, the spring 15 is arranged in the spring cap 14, the bolt 16 penetrates through the spring cap 14, the spring 15 and the crank shaft 18, the bottom of the crank shaft is inserted into the locking hole or the unlocking hole, the cylindrical pin 17 is arranged at the top of the bolt 16, and the top of the transmission pipe 6 is connected with the first bearing 20, the bottom of the transmission pipe 6 is connected with a third bearing 36, the third bearing 36 is fixed on a square frame end cover 25 of the underwater operation tool of the choke plug component for the nuclear power station, a shifting fork 35 is arranged at the lower end of the transmission pipe 6, a shifting finger 34 matched with the shifting fork 35 is arranged at the upper end of the inner pipe 12, and the shifting finger 34 is inserted into the shifting fork 35.

The cylindrical pin 17 is pulled upward to disengage the bottom of the latch 16 from the locking hole or unlocking hole, and then the crank shaft 18 is rotated, and when the latch 16 is aligned again with the locking hole or unlocking hole, the cylindrical pin 17 is released, and the latch 16 is inserted again into the corresponding hole by the restoring force of the spring 15. The crank shaft 18 rotates and simultaneously drives the transmission pipe 6 to rotate, so that the shifting fork 35 on the transmission pipe 6 is driven to rotate, the shifting finger 34 is driven to rotate due to the fact that the shifting finger 34 is inserted into the shifting fork 35, the inner cylinder 12 rotates along with the shifting finger 34 and drives the grabbing device to rotate, the bolt 16 is inserted into the locking hole, the grabbing device rotates to the locking position, the bolt 16 is inserted into the unlocking hole, and the grabbing device rotates to the unlocking position.

Referring to fig. 2, the underwater operation tool of the choke plug assembly for the nuclear power station comprises an upper section assembly and a lower section assembly, wherein the upper section assembly and the lower section assembly are connected through a square frame end cover 25, the upper section assembly comprises an upper suspension arm 1, an outer pipe 2, a support pipe 5 and a transmission device of the utility model, and the lower section assembly comprises a square frame 7, a walking mechanism 8, the outer pipe 2, an inner pipe 12, a bottom plate 11, a positioning device and a grabbing device. The top of outer tube 2 is equipped with davit 1, and the upper segment suit of outer tube 2 is in stay tube 5, is equipped with uide bushing 4 between the both ends of stay tube 5 and outer tube 2, and the bottom of stay tube 5 is fixed on square frame end cover 25, is equipped with jib 26 on the square frame end cover 25, and inner tube 12 suit is in the hypomere of outer tube 2, and the top of inner tube 12 is connected with second bearing 24, and second bearing 24 is fixed in the middle section of outer tube 2, and the bottom of inner tube 12 is connected with grabbing device after stretching out from outer tube 2. The top of the square frame 7 is fixed on the square frame end cover 25, the bottom of the square frame 7 is fixed on the bottom plate 11, the positioning device is fixed at the bottom of the bottom plate 11, the middle of the bottom plate 11 is provided with an opening allowing the gripping device and the choke plug assembly to pass through, the lower section of the square frame 7 is provided with an upper travel stop block 22, the bottom plate 11 is provided with a lower travel stop block, and the traveling mechanism 8 is fixed at the lower end of the outer pipe 2 and is positioned between the upper travel stop block 22 and the lower travel stop block.

The following description is given of a specific structure of a positioning device and a gripping device that can be used for a specific choke plug assembly underwater operation tool for a nuclear power plant, but is not limited thereto.

Referring to fig. 6-7, the gripping device includes an outer sleeve 61, an end cover 62, an inner sleeve 63, and a pin 47, the inner sleeve 63 is sleeved on the bottom of the inner cylinder 12 and is sleeved inside the outer sleeve 61, the end cover 62 is sealed on the top of the outer sleeve 61 and the inner sleeve 63, the pin 47 penetrates through the outer sleeve 61, the inner sleeve 63, and the inner cylinder 12 to fix the outer sleeve 61 and the inner sleeve 63 on the bottom of the inner cylinder 12, and the lower portions of the outer sleeve 61 and the inner sleeve 63 are provided with bayonets 68 for gripping and locking the choke plug pressing pieces 67. The positioning device comprises a positioning plate 13, distance pipes 64, positioning pins 65 and supporting pins 66, the tops of the four distance pipes 64 are respectively fixed at four corners of the bottom plate 11, the positioning plate 13 is fixed at the lower parts of the four distance pipes 64, the positioning pins 65 are arranged at the bottoms of the two diagonal distance pipes 64, the supporting pins 66 are arranged at the bottoms of the other two distance pipes 64, and an opening allowing the grabbing device and the choke plug assembly to pass through is formed in the center of the positioning plate 13.

Furthermore, a limiting device can be arranged on the upper-section component, the station of the underwater operation tool of the choke plug component for the nuclear power station is limited, and the task of plugging or pulling out the choke plug component can be well completed through switching among the initial position, the low position and the high position in the working process, so that the operation safety and reliability are improved, and the fault occurrence probability is reduced.

The following description is directed to a specific structure of a stopper device that can be used in a specific underwater operation tool for a choke plug assembly for a nuclear power plant, but is not limited thereto.

Referring to fig. 5, the limiting device comprises a limiting groove formed in an outer tube 2 of the underwater choke plug assembly operating tool for the nuclear power station and two sets of locking assemblies 3 symmetrically fixed to a support plate 5 of the underwater choke plug assembly operating tool for the nuclear power station, wherein the limiting groove comprises a first T-shaped groove 9, a second T-shaped groove 10 and a third T-shaped groove 23, and the first T-shaped groove 9, the second T-shaped groove 10 and the third T-shaped groove 23 are sequentially formed in the upper section of the outer tube 2 from top to bottom. The locking assembly 3 comprises a spring cap 14, a spring 15, a plug pin 16 and a cylindrical pin 17, the spring cap 14 is fixed on the upper section of the support plate 5, the spring 15 is arranged in the spring cap 14, the plug pin 16 penetrates through the spring cap 14 and the spring 15, the inner end of the plug pin 16 is inserted into the first T-shaped groove 9, the second T-shaped groove 10 or the third T-shaped groove 23, and the cylindrical pin 17 is arranged at the outer end of the plug pin 16; when the plug 16 is inserted into the first T-shaped groove 9, the second T-shaped groove 10 and the third T-shaped groove 23, the grabbing devices of the underwater operation tool for the choke plug assembly for the nuclear power station are respectively located at a low position, an initial position and a high position, that is, the first T-shaped groove 9 corresponds to the low position, the second T-shaped groove 10 corresponds to the initial position, and the third T-shaped groove 23 corresponds to the high position. The finger 34 is inserted into the fork 35 only in the low position, and the finger 34 is positioned above the fork 35 in the initial position and the high position.

After the two cylindrical pins 17 are simultaneously pulled outwards to make the inner ends of the pins 16 be disengaged from the first T-shaped groove 9, the second T-shaped groove 10 and the third T-shaped groove 23, the upper suspension arm 1 or the suspension rod 26 is pulled by a mechanical arm to make the outer pipe 2 and the support pipe 5 move relatively, and when the pins 16 are moved to be aligned with any one T-shaped groove, the pins 16 are automatically inserted into the T-shaped groove under the restoring force of the springs 15. During the process of replacing the T-shaped groove of the bolt 16, the cylindrical pin 17 in the stroke hole 27 moves along with the T-shaped groove, when the lower position is adopted, the cylindrical pin 17 is positioned at the bottom of the stroke hole 27, and when the upper position is adopted, the cylindrical pin 17 is positioned at the top of the stroke hole 27.

Further, the limiting means may further include a travel hole 27 formed in the support plate 5 and a cylindrical pin 17 passing through the travel hole 27 of the outer tube 2 and the support tube 5. The stroke hole 27 and the cylindrical pin 17 penetrating through the stroke hole 27 on the support plate 5 and the outer tube 2 can play a further limiting role, the limiting range is from a low position to a high position, double insurance of the limiting role is realized, and safety and reliability are further enhanced.

Referring to fig. 2, a suspension plate 28 is provided on the support tube 5 for suspending the underwater operation tool for a choke plug assembly for a nuclear power plant from a fuel operation tool assembly hanger. The underwater operation tool of the choke plug assembly for the nuclear power station is stored on the combined hanging rack of the fuel operation tool after being used.

The specific working process of the whole underwater operation tool of the choke plug assembly for the nuclear power station is as follows:

when the choke plug assembly needs to be inserted, the initial position is changed into a low position, the pin 16 in the transmission device is inserted into the unlocking hole, the shifting finger 34 moves downwards and is inserted into the shifting fork 35, the gripping device extends out of the bottom plate 11, the choke plug pressing piece 67 enters the unlocking position of the bayonet 68 through the opening of the bayonet 68 on the gripping device, then the cylindrical pin 17 in the transmission device is pulled to pull out the pin 16, the pin 16 is inserted into the locking hole under the rotation of the crank shaft 18, simultaneously the crank shaft 18 drives the transmission shaft 6 to rotate so as to drive the shifting fork 35 to shift the shifting finger 34, the inner cylinder 12 drives the gripping device to rotate, so that the choke plug pressing piece 67 is positioned at the locking position of the bayonet 68, at the moment, the upper suspension arm 1 and the suspension rod 26 are driven by the mechanical arm, so that the choke plug assembly is driven by the whole underwater operation tool for the choke plug assembly for the nuclear power plant to move downwards, and the choke plug assembly is inserted into a preset position after being positioned by the positioning device, at the moment, the transmission device is rotated to an unlocking position, the low position is changed into an initial position, and then the mechanical arm drives the whole underwater operation tool of the choke plug assembly for the nuclear power station to move upwards.

When the choke plug component needs to be pulled out, the upper suspension arm 1 and the suspension rod 26 are driven by the mechanical arm, so that the whole underwater operation tool for the choke plug component of the nuclear power station moves downwards to be close to the choke plug component, after the underwater operation tool is positioned by the positioning device, the underwater operation tool is changed from an initial position to a low position, the pin 16 in the transmission device is inserted into the unlocking hole, the shifting fork 34 moves downwards and is inserted into the shifting fork 35, the gripping device extends out of the bottom plate 11, the choke plug pressing piece 67 enters the unlocking position of the bayonet 68 through the opening of the bayonet 68 on the gripping device, then the pin 16 is pulled out by pulling the cylindrical pin 17 in the transmission device, the pin 16 is inserted into the locking hole under the rotation of the crank shaft 18, meanwhile, the crank shaft 18 drives the transmission shaft 6 to rotate so as to drive the shifting fork 35 to shift the shifting fork 34, so that the inner cylinder 12 drives the gripping device to rotate, the choke plug pressing piece 67 is positioned at the locking position of the bayonet 68 and then is changed from the low position to the high position, the grabbing device drives the choke plug assembly to move upwards, so that the choke plug assembly is completely grabbed into the underwater operation tool of the choke plug assembly for the nuclear power station, and the whole underwater operation tool of the choke plug assembly for the nuclear power station and the choke plug assembly are driven by the mechanical arm to move upwards together.

The present invention has been described in further detail with reference to the embodiments, and it is not to be construed that the embodiments are limited thereto; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.

Claims

1. A choke plug subassembly underwater operation instrument transmission for nuclear power station which characterized in that: comprises a transmission pipe (6), a spring cap (14), a spring (15), a bolt (16), a cylindrical pin (17), a crank shaft (18), a locking plate (19), a first bearing (20), a shifting finger (34), a shifting fork (35) and a third bearing (36), wherein the locking plate (19) is fixed on a supporting pipe (5) of an underwater operation tool of a choke plug component for a nuclear power station, the locking plate (19) is provided with the first bearing (20) and is provided with a locking hole and an unlocking hole, the crank shaft (18) is positioned above the locking plate (19) and is connected with the first bearing (20), a crank of the crank shaft (18) is connected with the spring cap (14), the spring (15) is arranged in the spring cap (14), the bottom of the bolt (16) is inserted into the locking hole or the unlocking hole after the bolt (16) passes through the crank of the spring cap (14), the spring (15) and the crank shaft (18), the top of the bolt (16) is provided with the cylindrical pin (17), the top and the first bearing (20) of transmission pipe (6) are connected, and the bottom and the third bearing (36) of transmission pipe (6) are connected, and third bearing (36) are fixed on the square frame end cover (25) of the nuclear power station with choked flow stopper subassembly underwater operation instrument, and the lower extreme of transmission pipe (6) is equipped with shift fork (35), and the upper end of inner tube (12) is equipped with dials finger (34) supporting with shift fork (35), and dial finger (34) are inserted in shift fork (35).