KR102393592B1 - Sliding door system of the cleaning chamber for nuclear fuel rod long tube - Google Patents

Abstract

The present invention relates to a sliding door fastening system for a nuclear fuel rod intestinal tube washing device, and more particularly, providing a door capable of opening and closing the intestinal tube washing tank and maximizing the sealing force of the washing space of the washing tank through a fastening clamp. It relates to a sliding door fastening system for a nuclear fuel rod long tube cleaning device.
To this end, there is provided a washing tank provided for washing a plurality of nuclear fuel rod long tubes and having an opening opened upward, and a door for opening and closing the opening of the washing tank; guide rails installed on both sides of the washing tub and providing a path through which the door moves horizontally from one side of the opening of the washing tub to the opening of the washing tub; and a fastening clamp installed on the door and sealing the washing tub by clamping a door opposite to the opening of the washing tub to the washing tub, wherein the guide rail is installed so as to be raised and lowered from both sides of the washing tub in the height direction of the washing tub It provides a sliding door fastening system of a nuclear fuel rod long tube cleaning device, characterized in that it is.

Description

SLIDING DOOR SYSTEM OF THE CLEANING CHAMBER FOR NUCLEAR FUEL ROD LONG TUBE

The present invention relates to a sliding door fastening system of a nuclear fuel rod long tube cleaning device.

As one, more particularly, it relates to a sliding door fastening system of a nuclear fuel rod intestinal tube washing device capable of increasing the airtightness of a washing tank for washing intestinal tubes.

Zirconium (Zr) metal has similar mechanical properties and thermal conductivity to titanium-based (Ti) metal materials, and has superior corrosion resistance than any other metal material. It is widely used in materials, synthetic fibers, and parts for the textile and chemical industry. In particular, when elements such as Sn, Nb, Fe, Cr, Ni and Cu are added, an alloy with significantly improved corrosion resistance and mechanical properties can be obtained compared to pure zirconium. This zirconium alloy has a small neutron absorption cross-sectional area and excellent compatibility with uranium dioxide (UO2) used as a nuclear fuel, so it is very suitable for use as a core material for a nuclear reactor. Due to these characteristics, zirconium alloy is used as fuel cladding pipe, guide pipe, spacer grid, pressure pipe, etc. of light and heavy water reactors. Among them, the most widely used field is nuclear fuel cladding. In the future, it is expected that the use of zirconium metal materials will increase as domestic energy demand and energy production using nuclear power are likely to increase.

The manufacture of long tubes of fuel rods using zirconium alloys in the nuclear field is a cold

It is usually made by a machining process. Nuclear fuel rods made in the cold working process

Oily contaminants are attached to the inner and outer peripheral surfaces of the tube. In order to remove such oleaginous pollutants, conventionally, a plurality of nuclear fuel rod tubes are placed on an open table and water is sprayed to remove solid foreign substances attached to the plurality of nuclear fuel rod long tubes, and then the operator uses a hoist to A plurality of nuclear fuel rod long tubes from which the foreign substances have been removed are immersed in the washing solution stored in the primary washing solution storage tank and taken out to repeatedly perform the primary washing operation, and then the operator uses a hoist to perform the primary washing treatment The plurality of nuclear fuel rod long tubes are immersed in the washing solution stored in the secondary washing solution storage tank, and then the secondary washing operation is repeatedly performed, and then the operator uses a hoist to perform the secondary washing treatment of the plurality of nuclear fuel The first rinsing operation is performed by repeatedly immersing the rod rod tube in the water stored in the primary rinse tank and withdrawing it, and then the operator uses a hoist to remove the plurality of nuclear fuel rod rod tubes subjected to the primary rinsing process. After performing the secondary rinsing operation by repeating immersion in the stored water of the secondary rinsing tank and withdrawing it, the method of drying the second rinsing-treated plurality of nuclear fuel rod long tubes is adopted in a drying room to wash the oily contaminants work was performed. In the washing process, alkaline detergent is used as the washing liquid, and for example, in the case of OD detergent, it is treated in an aqueous solution with a concentration of 75 g/L to 120 g/L at 71 ° C to 82 ° C to clean the contaminated oil.

These alkaline detergents and their solutions used in the cleaning process of nuclear fuel rod intestinal tubes using zirconium alloy may have adverse effects on the human body, so cleaning is not possible.

Alkaline detergent powder and cleaning liquid should not scatter to the outside of the cleaning device, so the door of the cleaning tank that performs cleaning must be carefully manufactured. In order to increase the efficiency of the zirconium alloy intestinal tube cleaning process, In order to apply ultrasonic waves, it is necessary to increase the vacuum state and ultrasonic treatment efficiency of the washing tank. For this purpose, the door of the washing tank must be manufactured more precisely. In addition, for the automation and safe operation of the washing process, the process of opening and closing the door of the washing tank should be automated. However, in the conventional nuclear fuel rod intestinal tube washing apparatus, as shown in FIG. 1 , as the washing tank 10 is provided in an open form, the operator is directly exposed to harmful substances during the intestinal tube washing process, so there is a problem of poor work stability. there is.

In addition, the conventional fuel rod intestinal tube cleaning device fails to provide a vacuum state.

Therefore, since ultrasonic cleaning is difficult, there is a problem in that the efficiency of the cleaning operation is lowered. In order to solve this problem, in the case of "nuclear fuel rod long tube cleaning apparatus and method" disclosed in Korean Patent No. 10-1394064, an efficient nuclear fuel rod long tube cleaning apparatus is provided, but how to solve the door problem is solved There is a problem that has not been done.

Republic of Korea Patent Registration No. 10-1394064

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a door that can open and close the washing tub to increase the airtightness of the washing tub, thereby improving the safety of the cleaning operation of the operator as well as vacuum and ultrasonic cleaning. This is to provide a sliding door fastening system for a nuclear fuel rod intestinal tube cleaning device that can increase the efficiency of the intestinal tube cleaning operation.

In order to achieve the above object, the present invention is provided for washing a plurality of nuclear fuel rod long tubes and includes a washing tub having an opening opened upward, a door for opening and closing the opening of the washing tub; guide rails installed on both sides of the washing tub and providing a path through which the door moves horizontally from one side of the opening of the washing tub to the opening of the washing tub; and a fastening clamp installed on the door and sealing the washing tub by clamping a door opposite to the opening of the washing tub to the washing tub, wherein the guide rail is installed so as to be raised and lowered from both sides of the washing tub in the height direction of the washing tub It provides a sliding door fastening system of a nuclear fuel rod long tube cleaning device, characterized in that.

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In addition, the guide rail is installed on one side of the short edge of the washing tub, and a fastening flange is formed to extend outwardly on the edge of the washing tub, and the fastening clamp applies a force to lift the bottom surface of the fastening flange to the It is preferable that the door be in close contact with the washing tub by a reaction force.

In this case, it is preferable that the fastening clamps are installed on both sides with respect to the upper center of the door so that the fastening force of the fastening clamps is uniformly applied to the washing tub and the door.

In this case, the fastening clamp may include: an upper clamp installed on the upper part of the door and including a horizontal rod that moves straight toward the edge of the door in a horizontal direction of the door; One side is shaft-coupled to the horizontal rod and the other side is shaft-coupled to the door so that it can be rotated about the other side by the straight movement of the horizontal rod, and a lower clamp including a vertical rod that moves in a straight line. It is preferable that the vertical rod has a support piece supported by being caught on the lower surface of the fastening flange.

The sliding door fastening system of the nuclear fuel rod long tube cleaning device according to the present invention has the following effects.

First, in the sliding door fastening system of the nuclear fuel rod long tube cleaning device, the door is provided in the washing tank, so that the airtightness of the washing tank can be maintained, thereby preventing harmful substances from leaking out during the washing process. Accordingly, the sliding door fastening system of the nuclear fuel rod long tube cleaning device has the effect of increasing the work safety of the operator.

Second, the sliding door fastening system of the nuclear fuel rod long tube cleaning device provides a fastening clamp to increase the adhesion between the washing tank and the door, thereby providing not only the airtightness of the washing tank but also a vacuum state in the washing tank to enable ultrasonic cleaning. This has the effect of maximizing efficiency.

1 is a photograph showing an open state of a washing tank of a nuclear fuel rod long tube washing apparatus according to the related art.
2 is a view showing a fuel rod long tube cleaning device in which a sliding door fastening system of the nuclear fuel rod long tube cleaning device is installed according to a preferred embodiment of the present invention.
3 is a photograph showing a state in which a nuclear fuel rod long tube is accommodated in a washing tank of a nuclear fuel rod long tube cleaning apparatus installed with a sliding door fastening system of the nuclear fuel rod long tube cleaning apparatus according to a preferred embodiment of the present invention.
4 is a view showing an open state of the door of the fuel rod long tube cleaning device installed with the sliding door fastening system of the nuclear fuel rod long tube cleaning device according to a preferred embodiment of the present invention.
5A is a photograph showing the main parts of a cleaning tank, a door, and a guide rail of a fuel rod long tube cleaning apparatus installed with a sliding door fastening system of the nuclear fuel rod long tube cleaning apparatus according to a preferred embodiment of the present invention.
Figure 5b is a main part photograph showing the guide rail of the sliding door fastening system of the nuclear fuel rod long tube cleaning apparatus according to a preferred embodiment of the present invention from the front.
6 is a side view showing the washing tank and the door of the fuel rod long tube cleaning apparatus installed with the sliding door fastening system of the nuclear fuel rod long tube cleaning apparatus according to a preferred embodiment of the present invention.
7 is a view showing only the main part from the front of the washing tank and the door of the nuclear fuel rod long tube cleaning apparatus installed with the sliding door fastening system of the nuclear fuel rod long tube cleaning apparatus according to a preferred embodiment of the present invention.
8 is a perspective view illustrating a fastening clamp of a sliding door fastening system of a nuclear fuel rod long tube washing apparatus according to a preferred embodiment of the present invention.
9 is a main part photograph showing a state in which a vertical rod of a fastening clamp constituting a sliding door fastening system of a nuclear fuel rod long tube washing apparatus according to a preferred embodiment of the present invention is drawn out.
10A and 10B are photographs of main parts and enlarged photos showing a state in which the vertical rods of the fastening clamps constituting the sliding door fastening system of the nuclear fuel rod long tube washing device according to the preferred embodiment of the present invention are positioned in the fastening grooves and the engaging grooves; am.
11 is a view showing a state in which the washing tank is sealed through the sliding door fastening system of the nuclear fuel rod long tube washing apparatus according to a preferred embodiment of the present invention.

The terms or words used in the present specification and claims are not to be construed as limited in their ordinary or dictionary meanings, and on the principle that the inventor can appropriately define the concept of the term in order to best describe his invention. It should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Hereinafter, a sliding door fastening system (hereinafter referred to as a 'door fastening system') of a nuclear fuel rod long tube cleaning apparatus according to a preferred embodiment of the present invention will be described with reference to FIGS. 2 to 11 attached thereto.

The door fastening system seals the inside of the washing tank in which the intestinal tube is accommodated and provides it in a vacuum state, thereby increasing the cleaning safety of the operator and the cleaning efficiency of the intestinal tube. The door fastening system includes a washing tank 100 , a door 200 , a guide rail 300 , and a fastening clamp 400 as shown in FIGS. 2 to 5B .

The washing tank 100 is configured to wash the intestinal tube, and forms a washing space 110 having an opening 100a opened upward. The washing tank 100 is preferably made in a rectangular shape for accommodating the intestinal tube as shown in FIGS. 2 and 3 . Accordingly, the washing tank 100 forms a short edge (短邊) and a long edge (張邊). A sealing member is preferably installed at the edge of the washing tank 100 . The sealing member is to increase the adhesion between the door 200 and the washing tub 100 to increase the airtightness of the washing tub 100 . A fastening flange 120 is formed at the edge of the washing tank 100 as shown in FIGS. 2 and 4 . The fastening flange 120 is formed to extend outwardly from the edge of the washing tub 100 to have a predetermined thickness. A plurality of fastening grooves 121 are formed in the fastening flange 120 along the fastening flange 120 . The fastening groove 121 is configured to increase the fastening force between the door 200 and the washing tank 100 through the arrangement of a fastening clamp vertical rod to be described later. The fastening groove 121 penetrates in the upper and lower directions of the fastening flange 120 , and one side of the fastening groove 121 is opened toward the outside of the fastening flange 120 .

The door 200 covers the opening 100a of the washing tub 100 to shield the washing space 110 , and is provided in a rectangular shape corresponding to the opening 100a of the washing tub 100 . The door 200 is provided to be able to move horizontally from one side of the washing tub 100 toward the opening 100a of the washing tub 100 . The door 200 is preferably provided with a plurality of ribs for rigidity of the door 200 . A coupling flange 210 is formed at the edge of the door 200 . The coupling flange 210 is formed to extend outwardly from the edge of the door 200 , and is formed to correspond to the fastening flange 120 of the washing tub 100 . A coupling groove 211 corresponding to the coupling groove 121 of the coupling flange 120 is formed in the coupling flange 210 , and one side of the coupling recess 211 is also formed to be opened.

Meanwhile, the transfer means 220 are installed on both sides of the door 200 . The transport means 220 is a medium that allows the door 200 to be transported toward the opening 100a of the washing tank 100 . The transfer means 220 includes a rolling member 221 that can be rolled, and is installed on both sides of the short side of the door 200 through the installation bracket 230 as shown in FIG. 5A . The rolling member 221 is preferably composed of a traveling roller (221a) and a guide roller (221b). The traveling roller 221a performs a rolling action for the driving of the door 200, and is horizontally axis-coupled with respect to the rolling direction at the lower portion of the installation bracket 230 as shown in FIGS. 5A and 5B. It is preferable that a plurality of traveling rollers 221a are installed in the short side direction of the door 200 as shown in FIG. 6 . The guide roller 221b serves to guide the traveling path of the door 200 not to deviate when the traveling roller 221a is driven, and is installed on one side of the traveling roller 221a as shown in FIGS. 5A and 5B . . The guide roller 221b is vertically coupled to the axis of the traveling roller 221a, and the rotational direction of the guide roller 221b is also perpendicular to the traveling roller 221a. A plurality of guide rollers 221b are also preferably installed in the short side direction of the door 200 as shown in FIG. 6 .

The guide rail 300 provides a path through which the door 200 is horizontally moved from one side of the washing tub 100 toward the opening 100a of the washing tub 100 . The guide rails 300 are installed on both sides of the washing tub 100 , and are installed on the short side of the washing tub 100 corresponding to the installation bracket 230 of the door 200 as shown in FIG. 5A . The guide rail 300 is formed to be flat for the rolling of the rolling member 221, and as shown in FIGS. 5A and 5B, the rolling space of the guide roller 221b and the traveling roller 221a through the guide block 310 ), the cloud space is partitioned. The guide block 221b is provided as a pair arranged on both sides to provide a rolling space for the guide roller 221b. The guide rail 300 is installed so as to be lifted through the lift cylinder 320 as shown in FIGS. 6 and 7 . Accordingly, the door 200 transported along the guide rail 300 may be raised and lowered toward the opening 100a of the washing tub 100 by the elevating action of the guide rail 300 .

The fastening clamp 400 serves to close the washing space 110 by fastening the door 200 located in the opening 100a of the washing tub 100 to the washing tub 100 . The fastening clamp 400 is installed on the door 200 as shown in FIGS. 2 and 4 and is installed in plurality along the long side of the door 200 . It is preferable that the fastening clamps 400 are provided as a pair installed on both sides of the upper portion of the door 200 with respect to the center of the door 200 . Accordingly, the fastening force of the fastening clamp 400 may be uniformly provided to the washing tub 100 . The fastening clamp 400 acts as a force to lift the washing tub 100 from the upper part of the door 200 , and at this time, the door 200 is lowered by a reaction force generated in the door 200 to lower the washing tub 100 . ) can be adhered to.

As shown in FIG. 8 , the fastening clamp 400 is preferably composed of a fixing bracket 410 , an upper clamp 420 , and a lower clamp 430 . The fixing bracket 410 is a configuration for fixing the upper clamp 420 and the lower clamp 430 to the door 200 , and is preferably installed on the coupling flange 210 of the door 200 . The fixing brackets 410 are preferably provided as a pair of opposing pairs, and are preferably installed with the coupling groove 211 of the coupling flange 210 therebetween. The upper clamp 420 serves to rotate the lower clamp 430 on the fixing bracket 410, and a horizontal rod ( 421). The lower clamp 430 serves to generate power to lift the washing tub 100 , and an end of the lower clamp 430 is shaft-coupled to the horizontal rod 421 . In addition, the lower clamp 430 is shaft-coupled to the fixing bracket 410 as shown in FIGS. 8 and 9 . For this reason, the lower clamp 430 rotates on the fixing bracket 410 as the horizontal rod 421 of the upper clamp 420 moves straight. The lower clamp 430 includes a vertical rod 431 for generating a straight vibration force downward. The diameter of the vertical rod 431 is formed smaller than the inner diameter of the coupling groove 211 and the coupling groove 121 so that the vertical rod 431 can enter and exit the coupling groove 211 and the coupling groove 121 . At this time, at the end of the vertical rod 431, a locking piece 431a is installed as shown in FIGS. 8 and 9 . The locking piece 431a is a component for fastening the lower clamp 430 and the washing tub 100 , and is caught in the fastening groove 121 of the fastening flange 120 to provide the power of the lower clamp 430 to the washing tub 100 . plays a role The locking piece 431a is preferably formed in a circular shape, and is formed to have a larger diameter than the inner diameter of the fastening groove 121 .

Meanwhile, as a power source for horizontally moving the door 200 to the washing tub 100 , the hydraulic cylinder 500 may be provided, and this configuration may be understood through FIG. 9 .

Hereinafter, the operation of the sliding door fastening system configured as described above will be described.

As shown in FIG. 3 , the operator accommodates a plurality of intestinal tubes in the washing space 110 of the washing tub 100 . Thereafter, the operator closes and seals the washing space 110 using the door 200 .

To this end, the operator operates the hydraulic cylinder 500 to horizontally move the door 200 of the state shown in FIG. 4 toward the opening 100a of the washing tub 100 . At this time, the transport means 220 of the door 200 transfers the door 200 to the opening 100a of the washing tub 100 while rolling along the guide rail 300 as shown in FIG. 5A .

Thereafter, when the door 200 is transported and faces the opening 100a of the washing tub 100, the operator operates the lifting cylinder 320 to lower the guide rail 300 as shown in FIG. . The door 200 descends together with the guide rail 300, and the coupling flange 210 of the door 200 is in close contact with the coupling flange 120 of the washing tub 100 as shown in FIGS. 7 and 8. . To be precise, the door 200 is seated on a sealing member (not shown) of the washing tub 100 .

Next, the operator operates the upper clamp 420 of the fastening clamp 400 to draw out the horizontal rod 421 to make a straight motion. At this time, the lower clamp 430 rotates around the fixing bracket 410 as shown in FIGS. 9 and 10A and is in a state perpendicular to the door 200 . At this time, the vertical rod 431 of the lower clamp 430 is inserted into the fastening groove 121 of the fastening flange 120 and the coupling groove 211 of the coupling flange 210 as shown in FIGS. 10A and 10B . . In addition, the engaging piece (431a) of the vertical rod (431) is in a state of being caught on the bottom surface of the fastening flange (120).

Next, the operator operates the lower clamp 430 to draw in the vertical rod 431 . That is, the operator raises the vertical rod 431 . At this time, the vertical rod 431 is caught on the fastening flange 120 of the washing tub 100 and acts as a force to lift the washing tub 100, that is, a lifting force. At this time, as a reaction force is generated in the door 200, the door 200 It descends toward the washing tank 100 . Thereafter, by the continuous operation of the lower clamp 430 , the door 200 closes the washing space 110 of the washing tub 100 as shown in FIG. 11 while pressing the sealing member. After that, the washing device performs a series of processes to wash the intestinal tube in the washing space 110 .

On the other hand, when the intestinal tube washing operation is completed, the above-described series of processes are performed in the reverse order, and the door 200 is moved horizontally and returned to one side of the washing tub 100 as shown in FIG. 2 .

As described so far, the sliding door fastening system of the nuclear fuel rod intestinal tube washing apparatus according to the present invention provides a door 200 in the nuclear fuel rod intestinal tube washing tank 100, thereby preventing harmful substances from being exposed during the intestinal tube washing process. As well as preventing it, it is possible to maximize the cleaning efficiency by increasing the sealing power of the cleaning space 110 of the cleaning tub 100 .

In the above, the present invention has been described in detail with respect to the described embodiments, but it is apparent to those skilled in the art that various changes and modifications are possible within the scope of the technical spirit of the present invention.

100: washing tank 100a: opening
110: washing space 120: fastening flange
121: fastening groove 200: door
210: coupling flange 211: coupling groove
220: transfer means 221: rolling member
221a: traveling roller 221b: guide roller
230: installation bracket 300: guide rail
310: guide block 320: elevating cylinder
400: fastening clamp 410: fixing bracket
420: upper clamp 421: horizontal rod
430: lower clamp 431: vertical rod
431a: catch piece 500: hydraulic cylinder

Claims (5)

A washing tank is provided for cleaning a plurality of fuel rod enteric tubes and comprising an opening opening upwardly;
a door for opening and closing the opening of the washing tank;
guide rails installed on both sides of the washing tub and providing a path through which the door moves horizontally from one side of the opening of the washing tub to the opening of the washing tub; and
a fastening clamp installed on the door and clamping a door opposite to the opening of the washing tub to the washing tub to close the washing tub;
The guide rail is a sliding door fastening system of a nuclear fuel rod long tube cleaning device, characterized in that it is installed so as to be raised and lowered in the height direction of the washing tank from both sides of the washing tank. delete According to claim 1,
The guide rail is installed on one side of a short edge of the washing tub, and a fastening flange is formed to extend outwardly on the edge of the washing tub,
The fastening clamp applies a force to lift the bottom surface of the fastening flange so that the door can be closely attached to the washing tank by the reaction force. 4. The method of claim 3,
The fastening clamps are installed on both sides with respect to the upper center of the door, so that the fastening force of the fastening clamps is uniformly applied to the washing tank and the door. 4. The method of claim 3,
The fastening clamp,
an upper clamp installed on the upper part of the door and including a horizontal rod that moves straight toward the edge of the door in a horizontal direction of the door;
One side is shaft-coupled to the horizontal rod and the other side is shaft-coupled to the door so that it can be rotated about the other side by the straight movement of the horizontal rod, including a lower clamp including a vertical rod that moves straight,
The vertical rod has a sliding door fastening system of a nuclear fuel rod long tube cleaning device, characterized in that the support piece is formed to be supported by hanging on the bottom surface of the fastening flange.

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