JPH0679627A - Vertical sand blast device - Google Patents

Abstract

PURPOSE:To facilitate the sand blasting work by fitting a vertical cabinet to the upper part of a cable, which is arranged vertically, at the time of eliminating the insulating film of an element wire in the connection end of the cable. CONSTITUTION:At the time of forming a connection part in the end of a cable to be laid vertically, the insulating cover of the cable 1 is peeled, and a base support member 40 is fitted for fixation to the lower part of the end connection of an exposed conductor 2. A bottom plate 30 of a cabinet is fitted to a support flange 42 provided in the base support member 40, and a conical ring 45 is installed to the upper part of an opening 35 of the central part, and rubber sheets 46, 48 are arranged in the upper and the lower parts of the conical ring 45 to form a seal means. A cylindrical main body 11 is combined on the bottom plate 30 of the cabinet to form a vertical cabinet 10, and the work for eliminating the insulating film of an element wire by sand blasting is performed inside of the vertical cabinet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for removing an insulating film of a wire at a connecting portion of a cable composed of a wire-insulated conductor made of a wire with an insulating film. A device for mounting a vertical cabinet from above the connection end portion to a device arranged by the above, so that work by sandblasting can be performed.

[0002]

2. Description of the Related Art In a large-capacity power transmission cable, an enamel-insulated (for example, polyimideamide-coated) conductor wire with an insulating film may be used as the conductor wire for the purpose of reducing power transmission loss due to a skin effect. . Then, when the terminal treatment of the cable conductor is performed or when the connection treatment is performed, it is necessary to remove the insulating film of the wire in order to ensure the electrical continuity of the end portion of the cable. is there. Therefore, in order to remove the insulating film of the strands, a sandblasting treatment means is generally used. As the sand blasting device, as shown in Japanese Utility Model Publication No. 4-17614, etc., a sand (alumina powder) is blown together with compressed air from a nozzle (shot gun) inserted into the blasting device to remove the film. Means of doing so are known.

In the conventional insulating film removing apparatus, a vertical prismatic hollow cabinet is provided with means for inserting and fixing the end portion of the cable from its side, and another nozzle is inserted. The insulating film is inserted through the hole and the sand sprayed from the nozzle is sprayed to remove the insulating film. Further, in the apparatus, the size of the opening of the cable is adjustable so that a cable of any size can be mounted and fixed, so that the work by sandblasting can be easily performed. By configuring the blast cabinet as a small size, it is possible to bring the blast cabinet through the manhole into the cave and easily perform the work of treating the connecting end of the cable.

[0004]

However, in the sandblasting apparatus as described above, although the cable can be extended horizontally, the insulating film can be easily removed, but the cable is When it is extended to the vertical state, there is a problem that sand or dust leaks out from the cabinet and cannot be easily dealt with.

[0005]

It is an object of the present invention to solve the above-mentioned problem of processing the end of a cable of the related art. For a cable in which the cable is arranged vertically, the insulation film of the connection terminal is not provided. It is an object of the present invention to provide a device that can be easily removed.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a cable composed of a wire-insulated stranded conductor made of a wire with an insulating film, while maintaining the connection end of the cable in a substantially vertical state. In order to remove the insulating coating of the strands, a device capable of inserting the connection end of the exposed cable conductor into the blast cabinet and performing sandblasting work with a nozzle corresponding to the end of the cable Regarding

In the present invention, a vertical cabinet is constructed by combining a cylindrical main body arranged so as to cover the connection end portion of the cable and a cabinet bottom plate arranged at the lower portion of the main body. Around the body of the, a plurality of holes for inserting the window member and the nozzle or the hand of the operator are arranged, and the cabinet bottom plate is supported through the base supporting member attached to the lower part of the connecting end of the cable,
A mechanism for supporting the main body of the vertical cabinet is provided on the cabinet bottom plate. Further, in the present invention, the lower part of the main body is arranged inside the vertical flange of the cabinet bottom plate to form a sealing means between both members,
Sealing means can be arranged between the opening of the cabinet bottom plate and the base of the conductor of the cable to prevent the dust in the device from leaking out. Further, in the present invention, in a case where a cable connecting portion is formed on an upper part of a device main body, a cabinet bottom plate is fixed to the upper part of the device main body via a jig, and a main body of a vertical cabinet with respect to the cabinet bottom plate. It is also possible to provide a sealing mechanism between the above and each component.

As described above, when a vertical cabinet is attached to the upper end of a cable in which the cable is projected in a substantially vertical state and the work of removing the insulation film of the wire is performed, the vertical cabinet The mechanism can be configured as a small one, and the vertical cabinet can be installed at the connection site of any cable for sandblasting work. By arranging the sealing means for the vertical cabinet, it is possible to prevent sand, dust, etc. from leaking out from the vertical cabinet during the work of removing the insulating coating of the strands, and the work can be performed. Even when the device is disassembled after the completion, it is possible to prevent dust from scattering.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The vertical sandblasting apparatus of the present invention will be described with reference to the illustrated example. In the vertical cabinet 10 of the present invention shown in FIG. 1, a cabinet bottom plate 30 is integrally attached to a lower portion of a substantially cylindrical main body 11 having an illumination box 25 arranged on an upper portion thereof. The lighting box 25 arranged on the upper part of the cylindrical main body 11 has a lamp 26 for illuminating the inside of the vertical cabinet and a tempered glass 27 for protecting the lamp 26. Around the main body, there are a number of windows 15 for monitoring the working condition, and holes 20 for the worker to insert his hand.
Are arranged at a predetermined interval, and the windows and the holes can be arranged in a positional relationship as shown in FIG.

In the example shown in FIG. 2, the windows 15, 15a, ...
0, 20a ... are arranged at equal angles, four each, and an operator inserts a hand and a sandblasting nozzle from any position into the main body of the vertical cabinet to perform the work. Will be able to do. further,
In the cabinet of the present invention, the insertion hole can be arranged at a position on the upper surface of the main body 11 beside the illumination box. If the insertion hole is also provided in the upper portion of the main body, the efficiency of sandblasting work can be improved. Further, a lateral flange 12 is provided on the lower portion of the main body 11 so as to project outward, and the flange 12 is provided with holes 13 ... At predetermined intervals. And FIG.
As shown in FIG.
When mounted on the No. 0, both members can be fixed by mounting the setscrews 14 ... through the holes provided in the lateral flange.

The window 15 provided in the main body 11 of the vertical cabinet is constructed as shown in FIG. FIG. 3
Although the glass plate 17 of the window shown in (1) uses tempered glass, there is a problem that when the sandblasting work is performed, the sand is blown to become frosted glass. Therefore, in order to attach the glass in an easily replaceable state, the window frame 16 is fixed to the side portion of the main body by welding or the like, and the rubber packing 1 is provided inside the window frame.
A mechanism is used in which a glass plate 17 is attached via 8, an outer frame 19 is arranged around the outside, and a fixing screw or the like is used for fixing. Therefore, when it is necessary to replace the glass plate after the sandblasting work is completed, the outer frame 1
It is possible to remove 9 and remove the glass plate 17 together with the rubber packing 18, install a new glass plate, and seal the periphery thereof.

A cabinet bottom plate 30 having a structure as shown in FIGS. 4 and 5 is provided in order to support the main body 11 configured as described above. The cabinet bottom plate 30 used in the vertical cabinet of the present invention is configured as a disc-shaped one that matches the shape of the main body, and the central portion thereof has
An opening 35 for inserting a cable is provided, and a discharge port 3 connected to a discharge pipe 37 is provided at a predetermined position of the disc.
6 is provided. Further, a vertical flange 31 is arranged around the cabinet bottom plate 30, and the horizontal flange 12 of the main body 11 is fitted and positioned along the inner surface of the vertical flange 31. Further, the vertical flange 31 is provided with a large number of screw holes 32 ... Matching the holes formed in the horizontal flange 12, and the set screw 14
This constitutes a mechanism for fixing both members.

As described above, the cabinet bottom plate 3
Inside the vertical flange 31 of 0, the horizontal flange 12 of the main body 1
By locating, it is possible to satisfactorily exert the action of the seal at the joint portion of both members. After the sandblasting work is completed, the vertical cabinet 10
Even if some sand remains inside, it prevents the sand accumulated on the cabinet bottom plate from overflowing to the outside when the main body is removed, facilitating post-treatment at the work site. Be able to do it.

A vertical cabinet 10 constructed by combining a cylindrical main body 11 on the cabinet bottom plate 30.
Is attached to the connection end of the cable 1 as shown in FIG. In the example shown in FIG. 6, the cable 1
A base support member 40 is arranged and fixed to the base support member 40, the cabinet bottom plate 30 is fixed via a support flange 42 provided on the base support member 40, and the main body 11 is mounted on the cabinet bottom plate 30 to form a vertical type. The cabinet can be configured. Further, the opening of the cabinet bottom plate 30 is located with respect to the support flange 42 of the base support member 40, and the opening 35 of the cabinet bottom plate is formed in the base support member 4.
It will be closed by the zero support flange 42 and a seal will be formed at the opening.

In addition to the above-mentioned sealing means, another sealing mechanism for covering the opening 35 is provided in the present invention. The other sealing means is a substantially conical metal ring 45 arranged so as to cover the upper portion of the cable 1.
And rubber sheets 46 and 48 arranged on the upper and lower parts of the ring 45, and the upper rubber sheet 46 is
A fastening band 47 is used to fasten and fix the conductor 1 of the cable 1 to a lower portion of the exposed portion of the conductor 2. Further, the lower rubber sheet 48 is attached to the lower portion of the ring 45 and the upper surface of the cabinet bottom plate 30 by any means, but the rubber sheet should be arranged in the upper and lower gaps of the ring. This makes it possible to prevent dust and the like generated by the sandblasting operation from leaking to the outside.

In the example shown in FIG. 6, when the vertical cabinet 10 is attached to the connection end of the cable 1, the base support member 40 is first attached to the lower part of the connection end of the cable. To fix. The base support member 40 can be configured, for example, as a member having a split shape, and clamps and fixes the cable 1 in a state where the cable penetrates the inside of the cylindrical member 41. When the cable is thinner than the inner diameter of the cylindrical member 41, a cushion material or the like is inserted into the gap between the two members to fix and hold the base supporting member to the cable. To set. After that, the base support member 40
The cabinet bottom plate 30 is supported by the support flange 42 projecting around it, and both members are fixed using set screws or the like, and the cable penetrates the opening 35 at the central portion of the cabinet bottom plate 30. And make it project upward. After fixing the base support member 40 and the cabinet bottom plate 30 as described above, the cylindrical main body 11 is mounted to form a sealed sandblasting device as shown in FIG.

In the state shown in FIG. 6, the connection end of the cable 1 inside the vertical cabinet 10 is inserted, and then the strands 4 of the conductor 2 are separated from each other as shown in FIG. Then, the sand S sprayed from the nozzle 5 is sprayed so that the work of removing the insulating film of the wire is performed. When removing the insulation film from the wires, insert a tool such as a screwdriver between the wires of the conductor to remove the gap between the layers of wires, as in the case of conventional sandblasting. It is possible to use a means for forming a large size and improving the sand spraying efficiency.

As described above, the vertical cabinet 10 of the present invention can be used to remove the insulating film on the wires of the cable. The vertical cabinet 10 of the present invention is shown in FIGS. As shown in, position the cable while supporting it on the base plate of the device to which the cable is connected.
You can also do sandblasting work. As shown in FIG. 8, with respect to the cable 1 protruding upward from the base plate 50 of the device, as shown in FIG. 9, the cable 1 having a predetermined height is fixed on the base plate 50. The tool 51 is attached, and the cabinet bottom plate 30 is fixed on the jig 51. Then, as shown in FIG. 10, the conical ring 45 is made to correspond to the conductor 2 exposed on the upper portion of the cable 1.
Then, the upper and lower rubber sheets 46 and 48 are arranged, and the upper rubber sheet 46 is fixedly held by the tightening band 47 to form the sealing means.

As shown in FIG. 10, after fixing the cabinet bottom plate 30 to the cable 1 and forming the lower seal, the segments forming the conductor 2 are formed as shown in FIG. The metal blocks 7, 7a ... Are inserted between the conductors 3, 3a. In the state shown in FIG. 11, when a gap is formed between the segment conductors forming the conductor, even if the block is removed thereafter, a slight gap is left between the segment conductors.

After the cable is pretreated in the state shown in FIG. 11, the cylindrical main body 11 is mounted as shown in FIG. 12, and the main body 11 and the cabinet bottom plate 30 are attached. Secure with set screws. And
The operator's hand and the nozzle for sandblasting are respectively inserted into the conductors 2 of the cable 1 stored in the vertical cabinet 10 through the holes arranged at the side portions of the vertical cabinet 10. As shown in FIG. 13, by inserting a tool between the layers of the strands 4 of the segment conductor 3 and separating the layers of the strands from each other, a sand is blown from the nozzle to insulate the strands. To remove it. When the gap between the strands of the segment conductor is opened, a tool can be inserted from any direction of arrows a and b to expand the gap between the strands of the strand. Thus, the work of removing the insulating film of the wire can be performed by spraying sand while the nozzle held by the operator is directed in any direction.

In the state shown in FIG. 13, compressed air is blown to discharge the sand and dust accumulated inside the cabinet from the discharge pipe. afterwards,
Make sure the inside of the cabinet is cleaned, and remove the main unit from the bottom plate. At that time, even if dust or the like accumulated between the bottom plate and the main body remains, the vertical flange of the bottom plate prevents the dust from leaking outside, so that it remains on the bottom plate. Dust etc. can be easily treated later. After that, the conical ring and the rubber sheet are removed, and the seal member is removed. Then, the conductors of the cable are tightened with steel tape or the like to be grouped into the shape of the segment conductors so as to be ready for the next connection processing work.

Further, the method of removing the insulating film of the strand as shown in FIGS. 11 to 13 can be carried out even inside the vertical cabinet in the state shown in FIG. In the state shown in FIG. 6, after attaching the base supporting member to the cable 1, the cabinet bottom plate 30
Can be fixed, and in that state, a block can be inserted between the segment conductors forming the conductor of the cable, and then the main body can be combined with the cabinet bottom plate to form a vertical cabinet.

[0023]

Since the vertical sandblasting apparatus of the present invention is constructed as described above, the vertical cabinet is attached to the upper end of the cable in which the cable is projected in a substantially vertical state. When the work of removing the insulating film of the wire is performed, the mechanism of the vertical cabinet can be configured as a small one, and the sandblasting work can be performed by installing the vertical cabinet at the connection site of an arbitrary cable. By arranging the sealing means for the vertical cabinet, it is possible to prevent sand, dust, etc. from leaking out from the vertical cabinet during the work of removing the insulating coating of the strands, and the work can be performed. Even when the device is disassembled after the completion, it is possible to prevent dust from scattering.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of a vertical cabinet of the present invention.

FIG. 2 is a bottom view of the vertical cabinet body.

FIG. 3 is a side view of a window provided in the vertical cabinet body.

FIG. 4 is a plan view of a cabinet bottom plate.

FIG. 5 is a side view of a cabinet bottom plate.

FIG. 6 is an explanatory view of a state in which a base support member is attached to a cable and a vertical cabinet is assembled.

FIG. 7 is an explanatory diagram of a state where the sandblasting work of the present invention is performed.

FIG. 8 is an explanatory diagram of a state in which the connection end portion of the cable projects on the base plate of the device.

FIG. 9 is an explanatory diagram showing a state where the cabinet bottom plate is positioned on the base plate of the device.

FIG. 10 is an explanatory diagram showing a state in which a lower seal member of the vertical cabinet is assembled.

FIG. 11 is a perspective view showing a state in which segment conductors are separated from each other.

FIG. 12 is an explanatory diagram of a state in which a main body is combined with the cabinet bottom plate fixed in the state of FIG. 10 to form a vertical cabinet.

FIG. 13 is an explanatory diagram of an operation of expanding between the strands of the segment conductor.

[Explanation of symbols]

1 cable, 2 conductors, 5 nozzles, 10
Vertical cabinet, 11 main body, 15
Window, 20 holes, 25 lighting box, 30
Cabinet bottom plate, 35 openings, 37 discharge pipe, 40 base support member, 42 support flange, 45 conical ring, 46/48 rubber sheet, 50 base plate, 51 jig.

Claims (3)

[Claims] 1. A cable composed of a wire-insulated stranded wire conductor made of a wire with an insulation film, the insulation film of the wire is removed while the connection end of the cable is supported in a substantially vertical state. In order to cover the connection end portion of the cable, in a device capable of inserting the connection end portion exposing the conductor of the cable into the inside of the blast cabinet and performing sandblasting work with a nozzle corresponding to the end portion of the cable. A cylindrical main body to be placed in a state and a cabinet bottom plate placed at the bottom of the main body are combined to form a vertical cabinet, and a window member, a nozzle, and a worker's hand are provided around the main body of the vertical cabinet. Arrange a plurality of holes to insert, to provide an opening for inserting a cable in the central portion of the cabinet bottom plate, and arrange a vertical flange around the bottom plate, An outlet is arranged at a predetermined position on the cabinet bottom plate, a pipe for collecting abrasives for sandblasting is connected, and the cabinet bottom plate is supported through a base supporting member attached to the lower part of the connecting end of the cable. A vertical sandblasting device, wherein a main body of a vertical cabinet is supported on the cabinet bottom plate. 2. The lower part of the main body is arranged inside the vertical flange of the cabinet bottom plate to form a sealing means between both members, and a seal is provided between the opening of the cabinet bottom plate and the base of the conductor of the cable. The vertical sandblasting apparatus according to claim 1, wherein means are arranged to prevent dust in the apparatus from leaking out. 3. A device for forming a cable connecting portion on an upper part of a device body, wherein a cabinet bottom plate is fixed to the upper part of the device body via a jig, and a main body of a vertical cabinet is attached to the cabinet bottom plate. The vertical sandblasting apparatus according to claim 1, further comprising a sealing mechanism provided between the constituent members.