KR20100138435A - Transportation apparatus of nuclear fuel bundle - Google Patents

Abstract

PURPOSE: A transportation apparatus of a nuclear fuel bundle is provided to implement no disaster, zero defect, and high productivity by stably transferring and loading the nuclear fuel bundle. CONSTITUTION: A spur gear is installed inside a body(100) and is rotatable. A guide bracket(230) for guiding the elevation of a carrying connection stick is installed in the body. The carrying connection stick is included in the upper part of the body and is connected to a carrier. The carrying connection stick is ascended or descended by a lifting unit. A driving link(300) rotates the spur gear according to the lifting of the carrying connection stick to guide the leading in or out of a grip.

Description

Transportation apparatus of nuclear fuel bundle

The present invention relates to a nuclear fuel assembly conveying apparatus for holding and transporting the completed nuclear fuel assembly to the packaging box.

A nuclear reactor is a device made to be used for various purposes such as generating heat by producing artificial fission reaction of fissile material, producing radioisotopes and plutonium, or forming a radiation field.

In general, heavy water reactors use natural uranium with a ratio of 0.7% uranium-235, and form a process of making uranium into cylindrical pellets weighing about 19g for processing into nuclear fuel used in nuclear reactors. About 31 of these pellets are inserted into a Zircaloy cladding tube, helium gas is put therein, and a stopper is welded to produce a fuel rod. These fuel rods finally form a fuel assembly and are burned by nuclear reaction in the reactor.

On the other hand, the aggregate bundle is loaded in a packing box and transferred to a nuclear power plant. By the way, in the past, the bundles of manufactured aggregates were manually loaded into the packing boxes by workers, in which case the weight of the aggregates was about 24 kg / bundle, which was very heavy and inconvenient to handle, causing the musculoskeletal disorders of the workers. Due to carelessness or other factors, the assembly may be damaged, and because it depends on manual labor, there is a limit to the work efficiency.

The present invention is to solve such a problem, the object of the present invention is to enable the stable transfer and loading of the finished assembly to meet the development of nuclear fuel in a direction that can achieve the accident-free, defect-free and high productivity, It is to provide a fuel assembly conveying device that can increase the speed of conveying and loading the fuel assembly.

In order to solve the above problems, a spur gear is rotatably installed therein, the body is provided with a grip that is drawn out in accordance with the rotation of the spur gear to grip the nuclear fuel assembly; A transport connecting rod provided on an upper side of the body and connected to a transport means, the transport connecting rod being raised or lowered by a lifting means; A transport apparatus for a nuclear fuel assembly including a driving link coupled to the transport connecting rod and interlocked with the lift connecting rod to rotate the spur gear to induce the drawing of the grip or the drawing of the grip.

According to the present invention, it is possible to keep the development of nuclear fuel in a direction that enables stable transportation and loading of the manufactured assembly to achieve zero-hazard, defect-free and high productivity, and to increase the speed of transfer and loading of the manufactured fuel assembly. It becomes possible.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the transfer device of the nuclear fuel assembly according to the present invention.

As shown in Figure 1 and 2, the transfer device of the nuclear fuel assembly of the present invention body 100, the transport connecting rod 200 is coupled to the upper portion of the body 100, the body 100 and the transport connecting rod 200 It includes a drive link 300 for interconnecting.

The body 100 is made of a substantially hexahedral metal material when viewed from the front, and a gripping groove 101 concave upwardly of a semi-circular shape is formed in the lower portion so as to correspond to the nuclear fuel assembly N at the bottom when viewed from the side.

A pair of spur gears 110 are rotatably installed by the gear shaft 111 in the longitudinal direction of the body 100, and a plurality of grips 120 holding the fuel assembly on both sides of the bottom of the body 100. ) Are provided symmetrically with each other. At this time, each grip 120 is configured to be in contact with the spur gear 110, by the rotation of the spur gear 110 is drawn out of the body 100 or drawn into the interior of the body (100). On the other hand, each grip 120 is formed in an arc shape so as to cover the nuclear fuel assembly in correspondence with the gripping groove 101, the inner side of the grip 120 is provided with a buffer such as rubber or urethane to provide sufficient buffering force in contact with the nuclear fuel assembly It is preferable that a member is provided.

The transport connecting rod 200 is positioned with a predetermined height difference on the upper side of the body 100 and is made of a metal plate material having a predetermined thickness of a “∧” shape. The transport connecting rod 200 is, for example, for moving to a box for transporting and loading the manufactured fuel assembly through a conveying means such as a hoist, the hook (H) of the transport means is caught in the center of the transport connecting link 200 The hook hole 201 is formed to be coupled.

In addition, the transport connecting rod 200 is configured to be raised or lowered by lifting means installed on the upper side of the body 100 to induce rotational force to the spur gear 110 to be described later. As for the lifting means, the disk-shaped rotating disk 220 is installed to be rotatable by approximately 180 ° by the disk bracket 222 fixed to the upper side of the body 100, and the rotating disk 220 is carried by the connecting link. It is coupled to the center of the connecting table (200). At this time, the rotating disk 220 is preferably provided with a handle 221 so that the operator can easily rotate the rotating disk 220.

Here, the guide brackets 230 for guiding the lifting or lowering of the transport connecting rod 200 are vertically fixed to both sides of the upper surface of the body 100 at both sides of the carrying connecting rod 200, and each guide bracket 230 is provided. In the center of the guide hole is formed long in the vertical direction. That is, the guide bracket 230 is vertically placed on the upper surface of both ends of the body 100 using a fixing member such as a fixing screw. In the center of each guide bracket 230, a guide hole 231 is vertically formed to guide the rise or fall of the transport connecting rod 200. On the other hand, at both ends of the transport connecting rod 200, the protrusion 210 is extended to be inserted into the guide hole 231 of the guide bracket 230.

Both ends of the transport connecting rod 200 are coupled to the driving link 300 provided on both sides of the body 100, respectively. The drive link 300 is to provide a driving force to rotate the spur gear 110 installed in the body 100, the first link 310 is hinged to one end rotatably to the transport connecting rod 200 And, one end is hinged to the other end of the first link 310 and the other end is composed of a second link 320 is rotatably coupled to the gear shaft (111). In this case, the driving link 300 is configured in pairs corresponding to the pair of spur gears 110 installed in the body 100.

The operation process of the transfer device of the nuclear fuel assembly configured as described above will be described with reference to FIGS. 3 to 5.

With the manufactured fuel assembly placed on the workbench, the transfer device coupled to the vehicle is lowered.

Then, when the operator grasps the handle and rotates the rotating disk 220 in one direction, the transport connecting table 200 coupled by the rotating disk 220 and the connecting link 223 in the state shown in Figure 3 guide bracket Ascending along the guide hole 230.

When the transport connecting rod 200 is raised, the first link 310 and the second link 320 coupled to both ends are rotated in sequence, so that the spur gear 110 is axially coupled to the second link 320. ) Rotates in one direction.

When the spur gear 110 is rotated, the grip 120 engaged with the spur gear 110 moves in the opposite direction and is drawn out to the lower side of the body 100, as shown in FIGS. 4 and 5. Will be held.

In this way, after the fuel assembly is held and the vehicle is moved and positioned on the packaging box, when the operator rotates the rotating disk 220 in the opposite direction, each component is operated in the reverse order as described above to package the fuel assembly. It sits in the box.

Therefore, the worker can quickly carry out the process of transporting and loading the manufactured nuclear fuel assembly into the packaging box, and also stably grips the nuclear fuel assembly using the gripping groove and the grip 120 of the body 100. Damage to the fuel assembly or carelessness of the operator can minimize damage to the fuel assembly.

1 is a perspective view showing a transfer device of the nuclear fuel assembly according to the present invention.

Figure 2 is a front view showing a transfer device of the fuel assembly according to the present invention.

Figure 3 and Figure 4 is a side view showing the operation of the transfer device of the nuclear fuel assembly according to the present invention, respectively.

5 is a state of use of the transfer device of the fuel assembly according to the present invention.

<Description of Symbols for Main Parts of Drawings>

100; Body 101; Gripping Home

110; Spur gear 111; Gear shaft

120; Grip

200; Transport connecting rod 201; Hook hole

210; Bend section 220; Rotating disc

221; Handle 222; Disc bracket

223; Link 230; Guide Bracket

231; Guide hole 240; Return spring

300; Drive link unit 310; First link

320; 2nd link

Claims (6)

A body having a spur gear rotatably installed therein and having at least one grip drawn out according to the rotation of the spur gear to hold the fuel assembly; A transport connecting rod provided on an upper side of the body and connected to a transport means, the transport connecting rod being raised or lowered by a lifting means; And a drive link coupled to the transport connecting rod so as to rotate the spur gear according to the lifting of the transport connecting rod to induce the drawing of the grip or the drawing of the grip. The method according to claim 1, The body of the nuclear fuel assembly, characterized in that the guide bracket for guiding the lifting of the transport connecting rod is installed. The method according to claim 1, A transport apparatus for the fuel assembly, characterized in that a gripping groove is formed on the bottom of the body to correspond to the shape of the fuel assembly. The method according to claim 1, Transfer device for nuclear fuel assembly, characterized in that the inner side of the grip is provided with a buffer member. The method according to any one of claims 1 to 4, The elevating means includes a rotary disk rotatably installed on the upper side of the body, the both ends are coupled to the rotary disk and the transport connecting rod, respectively, and includes a linkage for elevating the transport connecting rod according to the rotation of the rotating disk. Conveying device of assembly. The method according to any one of claims 1 to 4, The drive link includes a first link having one end hinged to one side of the transport connecting rod, one end hinged to the other end of the first link and the other end coupled to the gear shaft of the spur gear. Transfer device for nuclear fuel assembly.

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