CN102693770A - Coordinate ground vehicle system of nuclear power plant - Google Patents

Abstract

The invention belongs to the technical field of reactor engineering, and discloses a nuclear power plant coordinate ground vehicle system, comprising: a shielding cover, a first movable device and a second movable device; the shielding cover is fixed in a hole provided on the first movable device , the inner cavity of the shielding cover is provided with a storage tank hanger; the first movable device includes a first wheel, and the second movable device includes a plurality of beams arranged in front and rear and second wheels installed at both ends of the beam, and the plurality of beams are respectively The first track is installed, and the first movable device can move left and right along the first track through the first wheels; a shaft is arranged under the second movable device, and the top of the shaft is a shielding floor, and a wellhead is opened on the shielding floor, and a wellhead is installed in the wellhead. The shielded manhole cover is provided with a manhole cover gripper above the shielded manhole cover. The invention can realize the precise positioning and safe operation of the spent fuel storage shaft of the high temperature reactor.

Description

Nuclear power plant coordinate ground vehicle system

technical field

The invention belongs to the technical field of reactor engineering, in particular to a nuclear power plant coordinate ground vehicle system.

Background technique

The high-temperature reactor nuclear power plant is recognized as a nuclear power plant with the main characteristics of the fourth-generation nuclear power, which has the advantages of inherent safety, nuclear proliferation prevention, and high-temperature process heat generation.

The pebble bed high-temperature gas-cooled reactor adopts spherical fuel elements, and coated fuel particles are dispersed in the fuel elements. Spherical fuel element is to fully mix a certain amount of fuel particles and matrix graphite, press it into a graphite ball with a diameter of 50mm, and then wrap and press a layer of pure graphite on the outside as the shell of the fuel element. The outer diameter of the pressed fuel element is 60mm. The spherical spent fuel discharged from the core of the pebble bed high temperature gas-cooled reactor needs to be stored in a suitable storage container in a suitable intermediate storage facility. One of the feasible storage solutions is to put the spent fuel storage tank into the shielded storage shaft internal storage. The top of the spent fuel storage shaft is equipped with a shielded manhole cover, which can be made of steel, lead-filled or concrete, and the cost of the concrete shielded manhole cover is the lowest. When putting the spent fuel storage tank into the storage shaft or taking the storage tank out of the shaft, it is first necessary to lift the shielding manhole cover, and then carry out the hoisting operation of the storage tank in the shaft. During the operation of spent fuel storage tanks and shielded manhole covers, it is necessary to accurately position the storage tanks and manhole cover spreaders above each storage shaft through a set of ground truck system that can be accurately positioned. It can ensure the safe and reliable hoisting and positioning operation of storage tanks and manhole covers.

At present, there is no equipment that can realize the precise positioning and safe operation of the high temperature reactor spent fuel storage shaft.

Contents of the invention

(1) Technical problems to be solved

The technical problem to be solved by the invention is: how to realize the precise positioning and safe operation of the high temperature reactor spent fuel storage shaft.

(2) Technical solutions

In order to solve the above technical problems, the present invention provides a nuclear power plant coordinate ground vehicle system, including: a shield, a first movable device and a second movable device;

The shielding cover is fixed in the hole provided on the first movable device, and the inner cavity of the shielding cover is provided with a storage tank hanger;

The first movable device includes first wheels, the second movable device includes a plurality of beams arranged front and rear and second wheels installed at both ends of the beams, and first rails are respectively installed on the plurality of beams , the first movable device can move left and right along the first track through the first wheels;

A shaft is arranged below the second movable device, the top of the shaft is a shielding floor, and a wellhead is opened on the shielding floor, a shielding well cover is installed in the wellhead, and a well cover grab is arranged above the shielding well cover.

Preferably, the shaft is enclosed by side walls.

Preferably, second rails are installed at both ends of the cabin above the shielding floor, and the second movable device can move back and forth along the second rails through the second wheels.

Preferably, a detachable bottom plate is provided at the bottom of the shielding case.

Preferably, a winch is fixed on the first movable device, a steel wire rope is wound on the reel of the winch, one end of the steel wire is fixed on the winch, and the other end is fixed on the storage tank spreader, The middle part is guided by pulleys arranged on the top cover of the shield.

Preferably, a plurality of openings are opened on the top cover of the shielding case, and the steel wire rope passes through the openings to be connected with the storage tank hanger in the inner cavity of the shielding case.

Preferably, the system further includes a motor and a reducer, the motor and the reducer are fixed on the first movable device, the input end of the reducer is connected to the motor, and the output end is connected to the hoist.

Preferably, there are two sets of winches, electric motors and reducers.

Preferably, the system further includes an electric hoist and a bracket, the electric hoist is fixed on the bracket and connected to the manhole cover grab through a chain, and the bracket is fixed on the first movable device.

Preferably, a manhole cover guide strip is fixed on the support.

(3) Beneficial effects

The above technical solution has the following advantages: it can realize the precise positioning and safe operation of the high temperature reactor spent fuel storage shaft: through the left and right movement of the first movable device and the forward and backward movement of the second movable device, the shielding cover and the manhole cover grab can be realized Precise positioning on each wellhead; manhole cover guide strips are fixed on the bracket to provide guidance for the up and down movement of the shielded manhole cover, thus ensuring that the shielded manhole cover will not shake when moving up and down and the positioning is accurate; there are two sets of hoist, motor and reducer , can realize the redundant safety of hoisting spent fuel storage tank.

Description of drawings

Fig. 1 is the front view of the partial structure of the system of the embodiment of the present invention;

Fig. 2 is the top view of the system of the embodiment of the present invention;

Fig. 3 is a side sectional view of an embodiment of the present invention;

Fig. 4 is an axonometric view of a part of the structure of the embodiment of the present invention.

Among them, 1 shielding cover; 2 pulley; 3 wire rope; 4 hoist; 5 first movable device; 6 first wheel; 7 second movable device; 8 first track; 9 second wheel; 10 second track; 11 Electric hoist; 12 chain; 13 manhole cover grab; 14 manhole cover guide bar; 15 support; 16 reducer; 17 motor; 18 support seat; 19 wellhead; 20 shaft; tank; 24 bottom plate; 25 shielded floor; 26 shielded manhole cover.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

As shown in Figures 1 to 4, the structure of the nuclear power plant coordinate ground vehicle system in the embodiment of the present invention is as follows:

The spent fuel storage shafts 20 are composed of side walls 21 around them. The top of the shafts 20 is a shielding floor 25 on which the wellheads 19 of each shaft 20 are opened. The wellheads 19 are equipped with shielding well covers 26 .

The second track 10 is installed at the two ends of the cabin above the shielding floor slab 25, the second movable device 7 is made of two beams arranged front and rear, and the two ends of the two beams are equipped with second wheels 9, the second movable device 7 can The second wheel 9 moves back and forth along the second track 10 .

First rails 8 are installed on the two beams of the second movable device 7 respectively, and the first movable device 5 can move left and right along the first rails 8 through the first wheels 6 installed below it. Through the forward and backward movement of the second movable device 7 and the left and right movement of the first movable device 5 , precise positioning of the shielding cover 1 and the well cover grabber 13 on each wellhead 19 can be realized. The first mobile device 5 comprises, in addition to the first wheels 6 , a vehicle body, which in this embodiment is made of steel sheet.

The middle part of the first movable device 5 has a circular hole, and the shielding cover 1 is fixed in the circular hole of the first movable device 5 through the support seat 18. The inner cavity of the shielding cover 1 can accommodate a spent fuel storage tank 23, The fuel storage tank 23 can be placed on the drawable bottom plate 24 at the bottom of the shield 1 , and the bottom plate 24 can be opened to lift the spent fuel storage tank 23 into and out of the inner cavity of the shield 1 .

The inner cavity of the shielding cover 1 is provided with a storage tank hanger 22 for lifting a spent fuel storage tank 23 . The winch 4 used to drive the storage tank spreader 22 to rise and fall is fixed on the first movable device 5, and the wire rope 3 is wound on the reel of the winch 4, and one end of the wire rope 3 is fixed on the winch 4, and the other end is fixed on the storage tank On the lifting device 22, the center is guided by the pulley 2 fixed on the top cover of the shielding cover 1. There are multiple openings on the top cover of the shielding cover 1, and the steel wire rope 3 can pass through the openings and the storage tank in the inner cavity of the shielding cover 1. The spreader 22 is connected. The motor 17 and the reducer 16 for driving the winch 4 to rotate are also fixed on the first movable device 5 , the input end of the reducer 16 is connected to the motor 17 , and the output end is connected to the winch 4 .

There are two sets of winches 4, motors 17 and reducers 16 for hoisting the storage tank spreader 22, which can realize the redundant safety of hoisting the spent fuel storage tank 23. The safety of hoisting the spent fuel storage tank can still be guaranteed.

The manhole cover gripper 13 is used to hoist the shielded manhole cover 26, and the manhole cover grabber 13 can grab the shielded manhole cover 26 or disengage from the shielded manhole cover 26, and the electric hoist 11 is used to drive the manhole cover grabber 13 to rise and fall. 11 is fixed on the support 15, and the support 15 is fixed on the first movable device 5, and the electric hoist 11 is connected to the well cover grabber 13 through the chain 12. In order to ensure that the shielding well cover 26 moves up and down in an accurate direction, the support 15 is provided with a circumferentially arranged well cover guide bar 14 , and the well cover guide bar 14 is fixed on the support 15 to provide guidance for the shielding well cover 26 to move up and down.

The operation process of the coordinate ground vehicle system of the nuclear power plant is as follows:

1. Hoist the spent fuel storage tank 23 from the shield 1 into the shaft 20:

The initial state is: a spent fuel storage tank 23 has been placed in the shield 1 , and the spent fuel storage tank 23 is placed on the drawer bottom plate 24 . The wellhead of each vertical shaft 20 is equipped with a shielding well cover 26 .

The operation process is:

The second movable device 7 and the first movable device 5 drive the shielding cover 1, accurately locate the center of the manhole cover gripper 13 to the center of the wellhead 19 of the designated shaft 20 through an encoder or other means, and operate the electric hoist 11 to grasp the manhole cover. The tool 13 is lowered into the groove of the shielded manhole cover 26, the manhole cover grabber 13 is operated to grasp the shielded manhole cover 26, the electric hoist 11 is operated to lift the shielded manhole cover 26 from the wellhead 19, and under the guidance of the manhole cover guide bar 14, it is lifted to the bracket 15, complete the operation that the shielding well cover 26 is lifted from the wellhead 19.

Operate and move the second movable device 7, accurately position the center of the shield 1 to the center of the wellhead 19 of the designated shaft 20 through an encoder or other means, operate the motor 17 of the winch 4, and the storage tank spreader 22 will move the spent fuel storage tank 23 from the bottom plate 24, and then operate to open the bottom plate 24, operate the motor 17 of the winch 4, and the storage tank spreader 22 lowers the spent fuel storage tank 23 from the inner cavity of the shield 1, passes through the wellhead 19, and lifts the spent fuel storage tank 23 is placed in the shaft 20 for storage, and then the storage tank spreader 22 is remotely operated to disengage it from the spent fuel storage tank 23, and the motor 17 of the winch 4 is operated to retract the storage tank spreader 22 from the shaft 20 to the shielding cover 1 The operation closes the bottom plate 24 to complete the operation of hoisting the spent fuel storage tank 23 from the shield 1 into the shaft 20 for storage.

Operate and move the second movable device 7, relocate the center of the manhole cover grabber 13 precisely to the center of the wellhead 19 of the designated shaft 20 through an encoder or other means, and operate the electric hoist 11 and the manhole cover grabber 13 to lower the shielding manhole cover 26 to In the wellhead 19 of the shaft 20, operate the manhole cover gripper 13 to disengage from the shielded manhole cover 26, operate the electric hoist 11 to lift the manhole cover grabber 13 from the shielded manhole cover 26 to the bracket 15, and complete the shielded manhole cover 26 back to the wellhead 19 operations.

2. Hoist the spent fuel storage tank 23 from the shaft 20 into the shielding enclosure 1:

The initial state is: no spent fuel storage tank 23 is placed in the shield 1 , and the bottom plate 24 is in a closed state. The wellhead of each vertical shaft 20 is equipped with a shielding well cover 26 .

The operation process is:

The second movable device 7 and the first movable device 5 drive the shielding cover 1, accurately locate the center of the manhole cover gripper 13 to the center of the wellhead 19 of the designated shaft 20 through an encoder or other means, and operate the electric hoist 11 to grasp the manhole cover. The tool 13 is lowered into the groove of the shielded manhole cover 26, the manhole cover grabber 13 is operated to grasp the shielded manhole cover 26, the electric hoist 11 is operated to lift the shielded manhole cover 26 from the wellhead 19, and under the guidance of the manhole cover guide bar 14, it is lifted to the bracket 15, complete the operation that the shielding well cover 26 is lifted from the wellhead 19.

Operate and move the second movable device 7, accurately locate the center of the shield 1 to the center of the wellhead 19 of the designated shaft 20 through an encoder or other means, operate to open the bottom plate 24, operate the motor 17 of the winch 4, and store the tank spreader 22 is lowered from the inner cavity of the shielding cover 1, through the wellhead 19, lowers the storage tank hanger 22 onto the spent fuel storage tank 23 stored in the vertical shaft 20, and then remotely operates the storage tank hanger 22 to make it catch the spent fuel storage tank. Hoisting port of the tank 23, operate the motor 17 of the hoist 4, retract the storage tank hoist 22 and the spent fuel storage tank 23 from the shaft 20 to the inner cavity of the shield 1, operate the bottom plate 24 to close, and then operate the motor 17 of the hoist 4 , put the spent fuel storage tank 23 down on the base plate 24, and complete the operation of hoisting the spent fuel storage tank 23 from the shaft 20 into the inner cavity of the shield 1 for storage.

Operate and move the second movable device 7, relocate the center of the manhole cover grabber 13 precisely to the center of the wellhead 19 of the designated shaft 20 through an encoder or other means, and operate the electric hoist 11 and the manhole cover grabber 13 to lower the shielding manhole cover 26 to In the wellhead 19 of the shaft 20, operate the manhole cover gripper 13 to disengage from the shielded manhole cover 26, operate the electric hoist 11 to lift the manhole cover grabber 13 from the shielded manhole cover 26 to the bracket 15, and complete the shielded manhole cover 26 back to the wellhead 19 operations.

It can be seen from the above embodiments that the nuclear power plant coordinate ground vehicle system proposed by the embodiments of the present invention has the following advantages:

1. It can realize the long-distance remote control operation of the second movable device 7 and the first movable device 5, so as to prevent the operator from being exposed to radiation when operating at close range;

2. Precise positioning of the second movable device 7 and the first movable device 5 by means of an encoder can improve the reliability of various operations;

3. Radiation shielding of the spent fuel storage tank through the shielding cover allows operators to operate and maintain at close range to avoid radiation exposure;

4. There are two sets of winches for hoisting the storage tanks, which can realize the redundant safety of hoisting the spent fuel storage tanks, and can still ensure the safety of hoisting the spent fuel storage tanks in the event of accidental working conditions in which any set of hoisting units fails ;

5. It can realize the long-distance remote control operation of the hoisting of the shielded manhole cover, so as to avoid the radiation of the operator when operating at close range;

6. It can realize the long-distance remote control operation of storage tank hoisting, and avoid the operator from being exposed to radiation when operating at close range;

7. Through the integrated design of ground vehicles, shielding covers, manhole cover spreaders, storage tank spreaders and other equipment, various functions of spent fuel storage tank storage operations can be realized to meet the integration requirements of nuclear power plants.

The system of the present invention can realize the precise positioning and safe operation of the spent fuel storage shaft of the high temperature reactor, and the truck system can be used to operate spent fuel storage tanks, shielded manhole covers or other equipment of pressurized water reactor nuclear power plants and other types of nuclear power plants after appropriate modification, It can also be applied to precise positioning and hoisting operations under various working conditions in general industries.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and replacements can also be made, these improvements and replacements It should also be regarded as the protection scope of the present invention.

Claims (10)

1. a nuclear power station coordinate ground truck system is characterized in that, comprising: radome (1), first movable fixture (5) and second movable fixture (7);

Said radome (1) is fixed in the hole of being offered on first movable fixture (5), and the inner chamber of said radome (1) is provided with basin suspender (22);

Said first movable fixture (5) comprises first wheel (6); Many beams of arranging before and after said second movable fixture (7) comprises and second wheel (9) that is installed in said beam two ends; Be separately installed with first track (8) on the said many beams, said first movable fixture (5) can be through said first wheel (6) along first track (8) side-to-side movement;

Said second movable fixture (7) below is provided with vertical shaft (20); The top of said vertical shaft (20) is shielding floor (25); Have well head (19) on the said shielding floor (25), shielding well lid (26) is housed in the said well head (19), said shielding well lid (26) top is provided with well lid gripping apparatus (13).

2. the system of claim 1 is characterized in that, said vertical shaft (20) is surrounded by side wall (21).

3. the system of claim 1 is characterized in that, the two ends, cabin of shielding floor (25) top are equipped with second track (10), and said second movable fixture (7) can seesaw along second track (10) through said second wheel (9).

4. the system of claim 1 is characterized in that, the bottom of said radome (1) is provided with dismountable base plate (24).

5. the system of claim 1; It is characterized in that; Be fixed with windlass (4) on said first movable fixture (5), be wound with wire rope (3) on the reel of said windlass (4), an end of said wire rope (3) is fixed on the said windlass (4); The other end is fixed on the said basin suspender (22), leads through the pulley (2) that is arranged on radome (1) top cover in the middle part.

6. system as claimed in claim 5 is characterized in that, has a plurality of perforates on said radome (1) top cover, and said wire rope (3) passes said perforate and is connected with the basin suspender (22) of radome (1) inner chamber.

7. system as claimed in claim 5; It is characterized in that; Said system also comprises motor (17) and reductor (16); Said motor (17) and reductor (16) are fixed on first movable fixture (5), and the input end of said reductor (16) connects motor (17), and output terminal connects windlass (4).

8. system as claimed in claim 7 is characterized in that, said windlass (4), motor (17) and reductor (16) respectively have two covers.

9. like each described system in the claim 1～8; It is characterized in that; Said system also comprises electric block (11) and support (15); Said electric block (11) is fixed on the support (15), and is connected with said well lid gripping apparatus (13) through chain (12), and said support (15) is fixed on said first movable fixture (5).

10. system as claimed in claim 9 is characterized in that, is fixed with well lid gib block (14) on the said support (15).

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