JPH0593584U - Nut screw cleaning device - Google Patents

Abstract

(57) [Summary] [Purpose] To clean the nut screw part of nuclear equipment,
Uniformly and efficiently prevent exposure of workers. [Structure] A vertical rotating brush 6 is rotatably attached to an upper surface of a pedestal 3 installed on a trolley 1 by an electric motor 5, and a root of the rotating brush 6 is formed by a hollow ring-shaped enclosure 7 having an open inner peripheral surface. The guide columns 4 and 4 surrounding the portion and provided on the gantry 3 with the rotating brush 6 interposed therebetween are provided with an openable dust cover 10 and the rotating brush 6 passes through to accommodate the storage nut 8.
Both sides of the nut storage container 9 penetrating through the bottom of the passage hole 12 having a diameter that does not pass through are supported so as to be able to move up and down. Also, the sheaves 14, 1 rotatably attached to the upper ends of the guide columns 4, 4.
One end of each of the wire ropes 18, 18 wound around 4 is connected to the nut storage container 9, and the other end of each of the wire ropes 18, 18 is connected to the counter weights 16, 16.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a nut screw portion cleaning device capable of uniformly cleaning a nut screw portion removed at the time of maintenance and inspection in a nuclear facility such as a nuclear power plant while preventing exposure of an operator.

[0002]

[Prior Art]

 Conventionally, in nuclear power plants and other nuclear equipment, the nuts removed during maintenance inspections are transported to a cleaning location, where workers manually clean the nut screw parts using a wire brush. Was there.

[0003]

[Problems to be solved by the device]

 However, the worker's exposure increases due to the fact that the worker comes into contact with the nut contaminated with radioactivity or inhales the suspended dust separated from the nut screw part while cleaning the nut screw part. At the same time, the floating dust that separated from the nut thread deteriorates the work environment and spreads radioactive contamination.Furthermore, the nut thread is cleaned manually by the operator. It was difficult to clean the product, causing unevenness and poor work efficiency.

In view of the above situation, the present invention aims to provide a nut screw portion cleaning device capable of reducing the exposure of an operator and uniformly and efficiently cleaning the nut screw portion. To do.

[0005]

[Means for Solving the Problems]

 According to the present invention, a vertical rotating brush rotatable by an actuator is mounted on the upper surface of a frame, and a hollow ring-shaped enclosure having an inner peripheral surface opening surrounds the outer periphery of the root portion of the rotating brush to sandwich the rotating brush. Install the left and right guide columns on the rack, and use the guide columns on both sides of the nut storage container that has a dustproof cover that can be opened and closed and that has a through hole with a diameter that allows the rotating brush to pass and the nut to pass. A nut screw cleaning device characterized by being vertically movably supported, and a dust collecting device for collecting the dust scraped off from the nut screw part by the rotating brush. According to another aspect of the present invention, there is provided a nut screw cleaning device characterized in that the surrounding body is connected and connected by a connecting pipe.

[0006]

[Action]

 Lower the nut storage container containing the nuts until the rotating brush protrudes from the nut thread through the passage hole and is placed on the upper surface of the enclosure, then rotate the rotating brush with the actuator to clean the nut thread. Therefore, the entire nut screw part can be uniformly and efficiently cleaned. When cleaning the nut screw part, the nut is blocked from the outside by the nut storage container, the enclosure, and the top surface of the pedestal.Therefore, the radiation brush contained in the dust scraped off the nut screw part by the rotating brush. Can be prevented from being diffused, the exposure of workers can be reduced, and the working environment can be prevented from deteriorating.

Further, by connecting the dust collector and the enclosure in communication, the dust scraped from the nut screw part by the rotating brush can be collected without exposing it to the outside air, and the dust treatment is performed in the closed space. As a result, the exposure of the worker can be reduced and the deterioration of the working environment can be prevented.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

Two guide columns 4 and 4 are set up on both sides of the upper surface of a gantry 3 arranged on a trolley 1 in which wheels 2 are rotated and moved by an electric motor, facing each other with a required space. An electric motor 5 is attached to the lower surface of the pedestal 3, and a vertical output shaft of the electric motor 5 is planted so as to be positioned at the center of the gap between the two guide columns 4 and 4. A cylindrical body 6a standing upright and arranged on the upper surface of the pedestal 3 is connected so that the electric motor 5 can rotate the cylindrical body 6a, and an appropriate number of brushes are provided on the peripheral surface of the cylindrical body 6a. The member 6b is attached in the axial direction to form the rotating brush 6, and the outer periphery of the root portion (the end portion on the base 3 side) of the rotating brush 6 is formed into a ring shape as shown in FIG. Due to the enclosure 7 having a U-shaped cross-section with an open peripheral surface, the required spacing is increased. It is surrounded and surrounded. The dolly 1 may be of a type in which an operator moves.

A dustproof cover 10 is attached to a nut storage container 9 that stores the nut 8, and the front and upper surfaces of the nut storage container 9 are opened by the opening operation of the dustproof cover 10. Further, a grip plate 11 is attached to the front surface of the lower surface of the nut housing container 9, and the diameter of the nut housing container 9 is larger than the diameter of the rotary brush 6 and the housing nut 8 does not pass through. A through hole 12 having a size of a diameter is penetrated, and further, two guide wheels 13 and 13 are rotatably mounted on the both side surfaces of the nut storage container 9 in a vertical direction and the nut storage container is Two guide wheels 13 and 13 on both sides of 9 are fitted to the guide columns 4 and 4, and the nut storage container 9 moves up and down along the guide columns 4 and 4 through the guide wheels 13 and 13. Like ing.

A sheave 14 is rotatably attached to the upper ends of the two guide columns 4 and 4 so as to face the side surface of the nut storage container 9. The holding fixtures 17, 17 for holding the counterweight 16 are attached to the connecting tool 15, and are located outside the guide columns 4, 4 when the nut storage container 9 is viewed from the front (in the state of FIG. 1). Thus, the wire ropes 18, 18 each of which is symmetrically attached to the gantry 3 and one end of which is connected to each of the connecting members 15, 15 are wound around the sheaves 14, 14, and the other ends of the wire ropes 18, 18 are It is connected to 16. The sum of the weights of these counterweights 16 and 16 is approximately equal to the sum of the weight of the nut 8 and the nut storage container 9 that stores the nut 8, and the nut storage container 9 that stores the nut 8 therein. The operator can easily move up and down while keeping balance with the counterweights 16, 16.

A dust collector 19 is mounted on the trolley 1 so that it can move integrally with the nut storage container 9 and exert its mobility. The suction port of the dust collector 19 20 and the inside of the enclosure 7 are connected by a connecting pipe 21 so that the dust collecting device 19 can collect the dust that has fallen into the enclosure 7.

Next, the cleaning of the screw portion of the nut 8 will be described. First, the carriage 1 is moved to a required place. At this time, since the trolley 1 is loaded with various devices required for cleaning the screw portion of the nut 8, it is convenient that the various devices move in a set state. Next, the nut storage container is held by the holding bases 17 and 17 and is lifted by the counterweights 16 and 16 at the lower limit position as shown in FIGS. 1 and 2 to be positioned above the rotating brush 6. 2 is opened as shown by the phantom line in FIG. 2, the upper surface and the front surface of the nut storage container 9 are opened, and the nut 8 is aligned with the nut storage container 9 with the center of the screw portion aligned with the center of the passage hole 12. After accommodating, the dustproof cover 10 is closed as shown by the solid lines in FIGS.

As described above, after the nut 8 is housed in the nut housing container 9 and the dustproof cover 10 is closed, the operator applies a downward load to the grip plate 11 to pull up the counterweights 16, 16. Meanwhile, the nut storage container 9 is lowered along the guide columns 4 and 4. At this time, since the sum of the weights of the counter weights 16 and 16 and the weight of the nut storage container 9 storing the nut 8 are substantially equal and balanced, the operator uses the grip plate 11 to make a counter. The nut storage container 9 accommodating the nut 8 can be easily lowered while pulling up the weights 16, 16. The nut storage container 9 is lowered until the rotary brush 6 passes through the passage hole 12, the tip portion projects from the threaded portion of the nut 8, and the bottom surface is placed on the enclosure 7 as shown in FIG. At this time, since the bottom surface of the nut storage container 9 and the upper surface of the enclosure 7 are in close contact with each other as shown in FIG. 4, the inside and outside of the nut storage container 9 and the enclosure 7 are completely shielded. It is in.

Thereafter, the rotating brush 6 is rotated by the electric motor 5 to scrape off dust adhering to the threaded portion of the nut 8 to perform cleaning. Therefore, the rotating brush 6 can uniformly and efficiently clean the threaded portion of the nut 8. On the other hand, the dust scraped off from the thread portion of the nut 8 passes through the passage hole 12 and drops into the space partitioned by the enclosure 7, and the dust reaching this space is sucked from the connecting pipe 21 by the dust collector 19. To be done. At this time, since the airtight state is maintained in the enclosure 7 and during the inhalation process by the dust collector 19, it is possible to prevent the worker from being exposed to the radioactivity contained in the dust and to deteriorate the working environment. Can be prevented.

The present invention is not limited to the illustrated and described embodiments, and for example, the rotation of the rotary brush is performed by the rack and pinion drive system instead of the drive system by the electric motor, and the rise of the nut storage container is regulated. To prevent the counter weight from being held by installing a stopper on the guide column, a cylinder is used instead of the counter weight to raise and lower the nut storage container, and a dust collector is used as a trolley. Install it at the place where the nut screw is cleaned instead of placing it on the rack, and connect the suction port of the dust collector to the enclosure through the connecting pipe to reduce the size of the dolly and rotate it without using the dolly. It is optional to install a frame to which the brush is attached at a cleaning place, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0017]

[Effect of the device]

 As described above, according to the nut screw cleaning device of the present invention, it is possible to prevent the leakage and diffusion of dust containing radioactivity, so that it is possible to reduce the exposure of workers and prevent the deterioration of the working environment. Also, since the nut screw part is cleaned with a rotating brush, the nut screw part can be cleaned uniformly and efficiently, and by connecting the dust collector to the enclosure in communication, it is possible to use the enclosure body and the dust collector. In the inhalation process, the airtight state can be maintained, and the dust containing the radioactivity can be treated without being exposed to the outside air, which is advantageous in terms of working environment.

[Brief description of drawings]

FIG. 1 is a front view showing a nut screw portion cleaning device of the present invention.

FIG. 2 is a side view showing the nut screw cleaning device of the present invention.

FIG. 3 is a front view showing an operating state of the nut screw cleaning device of the present invention.

FIG. 4 is an enlarged sectional view of a portion X in FIG.

[Explanation of symbols]

 1 dolly 3 pedestal 4 guide strut 5 electric motor (actuator) 6 rotating brush 7 enclosure 8 nut 9 nut storage container 10 dustproof cover 12 through hole 13 guide wheel 14 sheave 15 connector 16 counterweight 17 holding base 18 wire rope 19 dust collection Device 21 Connection pipe

Claims (2)

[Scope of utility model registration request] 1. A vertical rotary brush rotatable by an actuator is attached to an upper surface of a frame, and a hollow ring-shaped enclosure having an inner peripheral surface opened surrounds the outer periphery of the root portion of the rotary brush. Both sides of the nut storage container, which is provided with the left and right guide columns sandwiched between them, has a dust cover that can be opened and closed, and has a through hole of a diameter through which the rotating brush passes and a nut does not pass are provided on both sides of the guide. A nut screw cleaning device characterized in that it is supported on a column so that it can move up and down. 2. A dust collecting device for collecting dust dust scraped off from a nut screw portion by the rotating brush, and the dust collecting device and the envelope are connected and connected by a connecting pipe. The nut screw part cleaning device according to 1.