CN216807794U - Lifting appliance for checking and salvaging underwater foreign matters of nuclear power station - Google Patents

Abstract

The utility model belongs to the technical field of mechanical design, and particularly relates to a lifting appliance for detecting underwater foreign matters and salvaging a submarine in a nuclear power station. The hoisting device comprises a lifting lug, a hoisting rod, a locking screw rod, a connecting ring and a lifting hook, wherein the middle of the hoisting rod is of a hollow structure, the lifting lug is fixedly connected with the top of the hoisting rod, and the lifting lug is used for being connected with the lifting hook and is connected with the lifting hook of a crane through the lifting hook; the bottom of the suspender is fixedly connected with the connecting ring, the lower part of the connecting ring is welded with the lifting hook, and the locking screw rod is of a solid long rod structure, penetrates through the suspender and the connecting ring respectively, and is in threaded connection with the lifting hook. The utility model can solve the defects existing in the lifting process of the current underwater foreign matter inspection and submarine salvage, save the working time, reduce the irradiated dose of personnel and reduce the working safety risk of hoisting personnel.

Description

Lifting appliance for checking and salvaging underwater foreign matters of nuclear power station

Technical Field

The utility model belongs to the technical field of mechanical design, and particularly relates to a lifting appliance for detecting underwater foreign matters and salvaging a submarine in a nuclear power station.

Background

The first-stage project of a certain nuclear power station is two VVER-1000 type units, a spent fuel pool, a reactor vertical shaft, a reactor core basket inspection well, a protection tube assembly inspection well and other primary circuit pools are arranged in a reactor plant, wherein the spent fuel pool is used for storing spent fuel, and the pools are filled with water for cooling the spent fuel during normal operation. The reactor shaft is used for installing a reactor, the unit is separated from a spent fuel pool through a water gate during operation, the reactor shaft is communicated with the spent fuel pool during reactor refueling, and the water level of the reactor shaft is consistent with that of the spent fuel. The core barrel inspection well and the protection tube assembly inspection well are used for storing and overhauling the core barrel and the protection assembly of the reactor respectively, and the core barrel inspection well and the protection tube assembly inspection well are filled with water in the running and overhauling processes of the unit. In the overhaul process of the unit, the work such as material changing, reactor overhaul and the like needs to be carried out on the pool, the situation that foreign matters enter a spent fuel pool, a reactor vertical shaft, a reactor core hanging basket inspection well and a protection tube assembly inspection well possibly occurs, in order to avoid the foreign matters entering a system to influence the operation safety of the unit, the underwater foreign matter inspection needs to be carried out on the position, and the found foreign matters are fished.

In the overhaul process of the unit, the special foreign matter inspection and salvage submarine is used for carrying out foreign matter inspection and salvage work on the water pools such as a spent fuel pool, a reactor vertical shaft, a reactor core hanging basket inspection well and a protective tube assembly inspection well.

The submarine for detecting and salvaging the underwater foreign matters mainly comprises a main body bracket, a buoyancy mechanism, a driving system, a camera system, a manipulator, a lighting system, a leveling system, a buoyancy adjusting system, a sensor system and the like, wherein the external dimension is 550 multiplied by 380 multiplied by 430mm, and the weight is about 32 kg. The main body support is mainly made of aluminum alloy materials and used for supporting the whole submarine component, and a hoisting cross beam is designed at the top of the main body support and used for hoisting the underwater submarine. Through the buoyancy mechanism, the driving system, the buoyancy adjusting system and the sensor system, the underwater submarine can hover, float, submerge and move horizontally within 0-30 m of water depth, and can be accurately maintained at any depth position, the camera system of the underwater submarine can realize close-range observation and shooting of foreign matters in water, the manipulator of the underwater submarine is used for salvaging a screwdriver, a wrench, a large screw and underwater foreign matters with irregular shapes, and the dust suction device equipped for the underwater submarine can suck small objects such as metal fragments, small parts, bolt nuts and the like.

When pool foreign matter inspection and salvage work such as a spent fuel pool, a reactor vertical shaft, a reactor core hanging basket inspection well, a protection tube assembly inspection well and the like is carried out, after an underwater submarine cable is connected and debugged, the underwater submarine needs to be hoisted into the pool from a ground storage position by using a crane, then the underwater foreign matter inspection and salvage work is carried out, and after the work is finished, the underwater submarine is hoisted out of the pool to the ground storage position by using the crane. At present, no special lifting appliance is used for lifting the underwater submarine, and a lifting belt connection mode is used for lifting. The existing hoisting method for the underwater submarine comprises the following steps: the hoisting personnel firstly connect the sling to the hoisting beam at the top of the underwater submarine, then connect the sling with the crane hook, hoist the underwater submarine from the storage position to the pool or from the pool to the storage position by using the crane, and release the sling from the underwater submarine after the sling is in place. The existing hoisting method of the underwater submarine has the following disadvantages:

(1) after the underwater submarine is hoisted into the water pool, a hoisting person needs to detach the hanging strip from the hanging beam of the underwater submarine, and needs to connect the hanging strip to the hanging beam of the underwater submarine when the underwater submarine is hoisted out of the water pool, and because the water level of the water pool is lower than the ground height on which the person stands, the operation of the hoisting person in detaching and connecting the hanging strip is difficult, and after the water level is lower than a certain height, the person cannot reach the position of the hanging beam of the underwater submarine, and cannot connect and disconnect the hanging strip with the underwater submarine;

(2) in the process of hoisting an underwater submarine by using a hoisting belt in a pool, hoisting personnel need to go down to the position of a hoisting beam of the underwater submarine at the ground position to dismantle and connect the hoisting belt, so that the great personnel falling safety risk exists;

(3) in the process of lifting the underwater submarine in the pool, workers always work around the pool of the primary loop, the environmental dose rate is high, and the radiation dose to the workers is high due to the long operation time of dismounting and connecting the hanging strips.

In order to solve the above disadvantages of the existing hoisting method, and combine the structural characteristics of the equipment and the actual situation on site, a lifting appliance for detecting underwater foreign matters and salvaging submarines in nuclear power stations is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a lifting appliance for detecting and salvaging underwater foreign matters in a nuclear power station according to the characteristics of field operation environment, overcomes the defects in the lifting process of the conventional underwater foreign matter detection and salvaging submarine, saves the working time, reduces the irradiation dose of personnel, and reduces the working safety risk of lifting personnel.

The technical scheme adopted by the utility model is as follows:

a lifting appliance for checking and salvaging underwater foreign matters comprises lifting lugs, a lifting rod, a locking screw, a connecting ring and a lifting hook, wherein the middle of the lifting rod is of a hollow structure, the lifting lugs are fixedly connected with the top of the lifting rod, and the lifting lugs are used for being connected with lifting straps and connected with a lifting hook of a crane through the lifting straps; the bottom of the suspender is fixedly connected with the connecting ring, the lower part of the connecting ring is welded with the lifting hook, and the locking screw rod is of a solid long rod structure, penetrates through the suspender and the connecting ring respectively and is in threaded connection with the lifting hook.

And operating handles are arranged on two sides of the upper part of the suspender and are used for personnel to operate to realize the connection and disconnection of the suspender and the hanging beam of the underwater submarine.

The lifting lug is formed by bending a stainless steel bar, is integrally in an inverted U shape, is semicircular at the top, and is fixedly connected with handles arranged on two sides of the upper part of the lifting rod at the bottoms of the left side rod and the right side rod of the lifting lug respectively.

The connecting ring is provided with a central hole, the central hole diameter is consistent with the central hole in the suspender, and the central hole is used for locking the screw rod to move up and down.

The locking screw rod moves up and down in the inner space of the hanging rod and the connecting ring, and external threads are arranged at the bottom of the locking screw rod.

And the lifting hook opening is provided with internal threads which are matched with the external threads at the bottom of the locking screw rod.

And a small handle is welded at the top of the locking screw rod and used for enabling the locking screw rod to move up and down.

The bottom of the lifting hook is flat, and when the lifting hook is matched with a square underwater submarine lifting beam, the contact area is increased.

A step is designed on a lifting hook opening of the lifting hook, so that the underwater submarine is prevented from sliding on the lifting hook during lifting.

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

(1) the utility model provides a lifting appliance for detecting and salvaging underwater foreign matters in a nuclear power station,

the lifting beam can be connected or detached with the underwater submarine in a long distance, and the problem that the lifting beam is difficult to detach and connect in a pool when the lifting beam is used for lifting is solved;

(2) the lifting appliance for detecting and salvaging the underwater foreign matters in the nuclear power station is integrally of a rigid structure, and the lifting rod is provided with the operating handle which can be conveniently connected with and detached from the lifting beam of the underwater submarine;

(3) the lifting appliance for detecting and salvaging the underwater foreign matters in the nuclear power station is provided with the inverted U-shaped lifting lug, and can be conveniently connected with a lifting hook of a crane;

(4) according to the lifting appliance for detecting and salvaging the underwater foreign matters in the nuclear power station, the bottom of the lifting hook is flat, the contact area is increased when the lifting hook is matched with the square underwater submarine lifting beam, and the step is designed on the lifting hook opening, so that the underwater submarine is prevented from sliding on the lifting hook during lifting;

(5) the utility model provides a lifting appliance for detecting and salvaging underwater foreign matters in a nuclear power station, which is designed with a locking screw, wherein the bottom of the locking screw is provided with an external thread which can be screwed into an internal thread on a lifting hook opening, and the risk that an underwater submarine falls off from a lifting hook can be avoided during lifting;

(6) according to the lifting appliance for detecting and salvaging the underwater foreign matters in the nuclear power station, the lifting appliance special for detecting and salvaging the underwater foreign matters replaces the lifting belt to carry out lifting work on the underwater submarine, so that the personnel falling risk caused by the operation that a lifting personnel downwards visits the position of the lifting beam of the underwater submarine to remove and connect the lifting belt can be avoided, meanwhile, the working time is reduced, and the irradiation dose of the working personnel is reduced.

Drawings

FIG. 1 is a schematic structural view of an underwater foreign matter inspection and submarine salvage hoist according to the present invention;

FIG. 2 is a schematic representation of the use of the present invention;

in the figure: 1-lifting lug, 2-lifting rod, 3-locking screw, 4-connecting ring, 5-lifting hook, 6-crane lifting hook, 7-lifting strap, 8-special lifting appliance and 9-underwater submarine.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in figures 1 and 2, the lifting appliance for detecting and salvaging underwater foreign matters comprises a lifting lug 1, a lifting rod 2, a locking screw rod 3, a connecting ring 4 and a lifting hook 5,

the lifting lug 1 is formed by bending a stainless steel bar, is integrally in an inverted U shape, is semicircular at the top, is used for connecting a hanging strip 7 and is connected with a crane lifting hook 6 through the hanging strip 7, the middle of the lifting rod 2 is of a hollow structure, and the inner space is used for accommodating a locking screw rod 3; the two sides of the upper part are provided with operating handles which are used for personnel to operate and realize the connection and disconnection of the lifting appliance 8 and the lifting beam of the underwater submarine 9, the operating handles at the two sides are connected with the lifting rod 2 through welding, and the bottoms of the left side rod and the right side rod of the lifting lug 1 are respectively connected with the handles arranged at the two sides of the upper part of the lifting rod 2 through welding; the bottom of the suspender 2 is connected with the connecting ring 4 in a welding manner, the connecting ring 4 is a connecting piece of the suspender 2 and the lifting hook 5, the upper part of the connecting ring 4 is welded with the bottom of the suspender 2, the lower part of the connecting ring is welded with the lifting hook 5, the connecting ring 4 is provided with a central hole, the central hole is consistent with the central hole in the suspender 2, and the central hole is used for locking the up-and-down movement of the screw rod 3.

Locking screw 3 is solid stock structure, passes jib 2 and go-between 4 respectively, can reciprocate at jib 2 and 4 inner spaces of go-between, and locking screw 3 bottom design has the external screw thread, can twist in the internal thread of the design on 5 mouths of lifting hook, locks 5 openings of lifting hook, plays the effect that drops from the lifting hook when preventing submarine hoist and mount under water. The top of the locking screw rod 3 is welded with a small handle which is used for the personnel to operate the locking screw rod 3 to move up and down and to screw the bottom thread of the locking screw rod 3 into the internal thread of the lifting hook 5 or screw out from the internal thread.

During hoisting, the weight of the underwater submarine borne by the lifting hook 5 is transferred to the suspender 2 through the connecting ring and then transferred to the lifting lug 1 through the operating handle on the upper part of the suspender 2.

The lifting hook 5 is used for being connected with an underwater submarine lifting beam, the bottom of the lifting hook 5 is flat, when the lifting hook is matched with a square underwater submarine lifting beam, the contact area is increased, a step is designed on a lifting hook opening, the underwater submarine can be prevented from sliding on the lifting hook during lifting, internal threads are further designed on the lifting hook opening and are used for being matched with external threads at the bottom of the locking screw rod 3, and the effect of preventing the underwater submarine from falling off from the lifting hook during lifting is achieved.

The utility model provides a using method of a lifting appliance for detecting and salvaging underwater foreign matters, which comprises the following steps:

(1) moving a crane hook to a position of a lifting appliance for checking underwater foreign matters and salvaging a submarine, connecting a lifting lug 1 with the crane hook through a lifting belt, lifting the lifting appliance to the position above a hanging beam for checking underwater foreign matters and salvaging the submarine by using a crane, manually lifting a locking screw rod 3 by a worker through a small handle to leave an opening of the lifting hook 5, connecting the lifting hook 5 with the hanging beam for checking underwater foreign matters and salvaging the submarine through a handle at the upper part of a lifting rod 2, lowering the locking screw rod 3 to the bottom, and screwing the locking screw rod 3 into an internal thread on the opening of the lifting hook 5 through the small handle (as shown in figure 2);

(2) hoisting an underwater foreign matter inspection and salvage submarine to a water pool needing foreign matter inspection and salvage by using a crane from a storage position, standing a worker at the side of the water pool after the underwater foreign matter inspection and salvage submarine floats on the water surface, manually screwing out a locking screw 3 from an internal thread on the opening of a lifting hook 5 by using a small handle, lifting the locking screw 3 upwards, separating the lifting hook 5 from an underwater foreign matter inspection and salvage submarine hanging beam by operating a handle at the upper part of a hanging rod 2, and then carrying out foreign matter inspection and salvage work on the water pool by using the submarine;

(3) after the foreign matter inspection and salvaging work of the water pool is finished, an operator controls the underwater foreign matter inspection and the salvaging submarine to float on the water surface, a lifting appliance is lifted to the position above a hanging beam of the underwater foreign matter inspection and the salvaging submarine by using a crane, the operator stands beside the water pool, manually lifts the locking screw rod 3 upwards through a small handle to empty an opening of the lifting hook 5, then connects the lifting hook 5 with the hanging beam of the underwater foreign matter inspection and the salvaging submarine through a handle at the upper part of the operation hanging rod 2, puts down the locking screw rod 3 to the bottom, and screws the locking screw rod 3 into an internal thread on the opening of the lifting hook 5 through the small handle;

(4) the underwater foreign matter inspection and salvage submarine is hoisted to a storage position from the water pool by using the crane, the locking screw 3 is manually screwed out from the internal thread on the opening of the lifting hook 5 by using the small handle, the locking screw 3 is lifted upwards, the lifting hook 5 is separated from the underwater foreign matter inspection and salvage submarine hanging beam by operating the handle on the upper part of the hanging rod 2, and then the connection between the lifting appliance and the lifting hook of the crane is detached.

The lifting appliance for detecting and salvaging the underwater foreign matters solves the defects existing in the lifting process of the existing underwater foreign matters, saves the working time, reduces the exposure dose of personnel, and reduces the working safety risk of lifting personnel. The project can be popularized and applied in the related work of the same type of units.

The special lifting appliance for detecting and salvaging the underwater foreign matters designed and developed by the project can be popularized to the lifting work of other similar equipment in a power station.

The project has good reference significance for the lifting work of other similar equipment in the same industry.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (9)

1. The utility model provides a foreign matter inspection under water and salvage hoist for submarine which characterized in that: the lifting device comprises lifting lugs (1), a lifting rod (2), a locking screw rod (3), a connecting ring (4) and a lifting hook (5), wherein the middle of the lifting rod (2) is of a hollow structure, the lifting lugs (1) are fixedly connected with the top of the lifting rod (2), and the lifting lugs (1) are used for being connected with lifting straps (7) and are connected with a crane lifting hook (6) through the lifting straps (7); the bottom of the suspender (2) is fixedly connected with the connecting ring (4), the lower part of the connecting ring (4) is welded with the lifting hook (5), and the locking screw (3) is of a solid long rod structure, passes through the suspender (2) and the connecting ring (4) respectively and is in threaded connection with the lifting hook (5).

2. The spreader for underwater foreign matter inspection and salvage submarine according to claim 1, wherein: and operating handles are arranged on two sides of the upper part of the suspender (2) and are used for personnel to operate and realize the connection and disconnection of the suspender (8) and the hanging beam of the underwater submarine (9).

3. The spreader for underwater foreign matter inspection and salvage submarine according to claim 2, wherein: the lifting lug (1) is formed by bending a stainless steel bar, is integrally in an inverted U shape, is semicircular at the top, and is fixedly connected with handles arranged on two sides of the upper part of the lifting rod (2) at the bottoms of left and right side rods of the lifting lug (1).

4. The spreader for underwater foreign matter inspection and salvage submarine according to claim 3, wherein: the connecting ring (4) is provided with a central hole, the central hole diameter is consistent with the central hole in the suspender (2), and the central hole is used for locking the up-and-down movement of the screw rod (3).

5. The spreader for underwater foreign matter inspection and salvage submarine according to claim 4, wherein: the locking screw rod (3) moves up and down in the inner space of the hanging rod (2) and the connecting ring (4), and external threads are arranged at the bottom of the locking screw rod (3).

6. The spreader for underwater foreign matter inspection and salvage submarine according to claim 5, wherein: and the opening of the lifting hook (5) is provided with internal threads which are matched with the external threads at the bottom of the locking screw rod (3).

7. The spreader for underwater foreign matter inspection and salvage submarine according to claim 6, wherein: and a small handle is welded at the top of the locking screw rod (3) and is used for the locking screw rod (3) to move up and down.

8. The spreader for underwater foreign matter inspection and salvage submarine according to claim 7, wherein: the bottom of the lifting hook (5) is flat, and when the lifting hook is matched with a square underwater submarine lifting beam, the contact area is increased.

9. The spreader for underwater foreign matter inspection and salvage submarine according to claim 8, wherein: a step is designed on a hook opening of the lifting hook (5), so that the underwater submarine is prevented from sliding on the lifting hook during lifting.

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