JPH05176439A - Line material fixing device and line material fixing method - Google Patents

Abstract

PURPOSE:To improve the work efficiency, the safety, etc., concerned with the fixture and removal of a line material by enabling it to be fixed easily and surely on the arranging face and enabling the removal work of the line material also easily and surely at the time of the fixation of the line material to a wall face or the like, and enabling one part of the constituent member to be installed permanently without a fear of falling off, etc. CONSTITUTION:This device is equipped with a seat 1, which is provided with a line material insertion groove 4 and is fixed to a line material arranging face 9, and a clamp 2, which engages with this seat 1 and holds, at the engaging face, a line material 11 within the line material insertion groove 4. And, the seat 1 is fixed to the line material arranging face 9 in advance, and the line material 11 is inserted into the line material insertion groove 4 of this seat, and then a clamp 2 is engaged with the seat 1, and the line material 11 is held, at the engaging face, inside the line material insertion groove 4 of the seat 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rod fastening device and a wire rod fastening method for fastening a wire rod such as a signal cable to a wall surface of a structure or the like, and particularly to a signal wire of a start-up test sensor of a nuclear reactor on a shroud wall. The present invention relates to a wire rod fastening device and a wire rod fastening method suitable for fastening.

[0002]

2. Description of the Related Art Generally, in the case of constructing a new type of reactor, that is, the first unit, in order to ensure safety, each part in the reactor is tested at the time of start-up test or initial power operation. The stress (strain), pressure, temperature, acceleration, etc. are measured.

In order to carry out such a measurement, various sensors are usually arranged in the core portion at the time of constructing a nuclear reactor, and a signal cable for guiding the sensor output to a display device outside the reactor is arranged along the core shroud or the like. , This signal cable is led to a display device outside the furnace.

As a means for fixing such a signal cable to the shroud wall, a thin plate (thickness: 0.2) has been conventionally used.
A signal cable is inserted into a support made of, for example, a bent plate having a cross section of Ω, and the support is fixed to the shroud wall by spot welding or the like.

[0005]

By the way, since the coolant flows at high speed in the reactor, several hundreds of supports are usually used to firmly fix the signal cable in order to prevent the signal cable from dropping. After the start-up test, etc. is completed and the necessary data is obtained, the signal cable should be completely removed so that the soundness of the equipment inside the reactor will not be adversely affected during future operation due to the signal cable falling off, etc. Required.

However, after the nuclear reactor is once operated, the inside of the reactor is activated by the combustion of nuclear fuel, and therefore it is impossible to directly perform the removal work,
It is usually removed by remote control.

In this case, since the above-mentioned support is welded and fixed to the shroud wall, the work of removing the support tends to be difficult, and a great amount of labor is spent to completely remove the support while preventing the support from falling off. At the same time, there was a problem that a special remote control device for removal was required.

A similar situation appears in various combustion equipment, high temperature equipment, and the like.

The present invention has been made in view of the above circumstances. A first object of the present invention is to easily and reliably fix a wire rod such as a signal cable to a mounting surface and also to easily remove the wire rod. In addition, it is possible to securely install it, and it is also possible to permanently install a part of the component at a site that is difficult to remove, so that workability and safety related to wire fastening and removal can be improved. It is to provide a wire rod fastening device that can be used.

A second object of the present invention is to provide a wire rod fixing method which enables the wire rod attaching work to be performed easily, quickly and surely by using the above wire rod fastening device.

[0011]

In order to achieve the first object, a wire rod fastening device according to the present invention is provided with a mounting seat having a wire rod insertion groove fixed to a wire rod mounting surface, and a fitting seat fitted to the mounting seat. And a clamp for holding the wire rod in the wire rod insertion groove by its fitting surface.

In order to achieve the second object, in the wire rod fastening method according to the present invention, a mounting seat with a wire rod insertion groove is fixed to a wire rod mounting surface, and the wire rod is inserted in the wire rod insertion groove of the mounting seat. After inserting, the clamp is fitted to the mounting seat, and the wire is held in the wire insertion groove of the mounting seat by the fitting surface of the clamp.

[0013]

In the present invention, when the wire rod is fastened, the mounting seat is first fixed to the required position on the wire rod mounting surface by welding or the like.

Then, the wire rod extending along the distribution surface is inserted into the wire rod insertion groove of the mounting seat, and then the clamp is fitted to the mounting seat, and the wire rod is inserted into the mounting seat at the fitting face of the clamp. It should be pressed and held in the groove. A simple stopper or the like may be attached to ensure the fitting.

When the wire rod is removed, the clamp fitted to the mounting seat is moved in the direction opposite to the fitting direction at the time of fastening, and thereby the clamp is removed from the mounting seat.
By pulling the wire rod in this state, the wire rod can also be removed from the wire rod insertion groove of the mounting seat.

When the stopper is attached as described above, the clamp may be removed by applying a mechanical force of a certain level or more that exceeds the stopping force of the stopper.

According to the present invention, when the wire rod is installed, it is only necessary to fix the attachment seat by welding, insert the wire rod into the groove of the attachment seat, and perform the clamp fitting operation. By setting the combined strength, sufficient wire rod holding strength can be obtained and reliable fastening can be performed.

Further, for wire rod removal, wire rod pull-out or the like is performed after clamp removal, but clamp wire removal work can be easily performed by moving the clamp in a direction opposite to the fastening direction. That is, even when the remote operation is performed, it can be performed easily and reliably by using a relatively simple device such as a crane.

After removing the clamp, the wire rod inserted in the groove of the mounting seat may be pulled out, and this work can be performed easily and surely.

The mounting seat can be removed by peeling it off with a force greater than the welding strength.

In this case, when the welding strength is high and it is difficult to remove it, there is no risk that the mounting seat will later fall off from the wire rod mounting surface, so no permanent inconvenience will occur.

Therefore, in a portion that is difficult to remove, if the mounting seat, which is a part of the constituent member, is permanently installed without fear of falling off, extra work can be omitted.

As described above, according to the present invention, it is possible to improve workability, safety and the like related to fastening and removing the wire.

[0024]

Embodiments of the present invention will be described below with reference to the drawings.

First, a first embodiment will be described with reference to FIGS. The present embodiment relates to a wire rod fastening device and a wire rod fastening method suitable for vertically fastening a signal cable of a sensor used when constructing the first reactor of a nuclear reactor to a core shroud wall.

As shown in FIG. 1, the wire rod fastening device of this embodiment comprises a mounting seat 1 and a clamp 2 fitted to the mounting seat 1.

The mounting seat 1 is integrally formed of, for example, rust-free steel or the like, and as shown in FIG. 2, a flat base 1a.
And a support plate portion 1c for clamp fitting, which is continuously provided in parallel on the surface thereof through a narrow continuous portion 1b. As a result, the mounting seat 1 has a substantially I-shaped cross section, and has the clamp fitting grooves 3 at both side positions between the base portion 1a and the support plate portion 1c.

The back surface of the support plate portion 1c of the mounting seat 1 is a surface parallel to the base portion 1a, but the front surface 1d of the support plate portion 1b is an inclined surface whose lower side gradually projects forward and becomes thick. It is said that. The inclined surface ends near the lower end portion of the support plate portion 1c, and the portion below the inclined surface is a surface parallel to the back surface side.

A wire rod insertion groove 4 extending in the vertical direction is formed at a substantially central position on the left and right sides of the support plate 1c. The bottom surface 4a of the wire rod insertion groove 4 is inclined along the surface of the support plate portion 1c. That is, the bottom surface 4a of the wire rod insertion groove 4
Also, almost the entire surface is an inclined surface, and the lower side from the vicinity of the lower end is a hanging lower surface. It should be noted that, for example, a lower portion of the bottom surface 4a from a position near the lower end portion may be inclined reversely to the upper portion to form a so-called middle-height structure.

On the other hand, the clamp 2 is, as shown in FIG. 3, a block-shaped clamp body 6 having a dovetail-shaped engagement groove 5 on the back side, and a loop-shaped projection provided on the upper surface of the clamp body 6. It has a lifting arm 7 and a stopper 8 protruding in a tongue shape on the lower surface of the clamp body 6, and like the mounting seat 1, it is made of non-rust steel or the like.

The back wall 5 of the engaging groove 5 of the clamp 2
b is a thickness to be inserted into the clamp fitting groove 3 of the mounting seat 1, and the front surface 5a of the engagement groove 5 is formed over the entire upper and lower sides with the surface 1d of the support plate portion 1b of the mounting seat 1. It is an inclined surface with a matching angle.

In use, however, as shown in FIGS. 1 and 4, first, the back surface side of the mounting seat 1 is fixed to a required portion of the wire rod mounting surface 9 by, for example, a welding portion 10 over the entire circumference.

Then, the wire rod 11 extending along the wire rod mounting surface 9 is inserted into the wire rod insertion groove 4 of the mounting seat 1, and thereafter, the engaging groove 5 of the clamp 2 is placed above the support plate portion 1c of the mounting seat 1. Fit it by dropping it from the bottom. In this case, clamp 2
The surface 5a on the front side of the engaging groove 5 is the support plate portion 1c of the mounting seat 1.
Since the lower surface of the engaging groove 5 is inclined along the surface 1d, the fitting action is easily performed. And
After fitting, the clamp 2 is pushed down by using its own weight, and the wire 5 is held in the wire insertion groove 4 of the mounting seat 1 by the front surface 5a of the engaging groove 5 of the clamp 2 which is a fitting surface. Let Since the engaging groove 5 of the clamp 2 has a small opening area on the upper side due to the inclination, the engaging groove 5 reliably stops at a predetermined position in the vertical direction of the mounting seat 1, for example, an intermediate portion.

Thereafter, the stopper 8 on the lower surface of the clamp body 6 is bent toward the mounting seat 1 side, and the bent portion is brought into contact with the lower surface of the mounting seat 1 to ensure the fitting and holding state. Good.

By the above work, the wire rod 11 can be clamped and fixed by the mounting seat 1 and the clamp 2 and fixed to a required position. In this case, all that is required is to fix the mounting seat 1 to the wire distribution surface 9 by welding, insert the wire 11 into the wire insertion groove 4 of the mounting seat 1, and fit the clamp 2 into the mounting seat 1. Since it is good, the work of fixing the wire rod is easy.

Moreover, since the clamp 2 is supported in the direction in which the fitting strength is strengthened by the downward load due to its own weight, and the stopper 8 prevents the clamp 2 from being pulled out, a sufficient wire holding strength and pulling-out are ensured. Can be done.

When applied to the fastening of the signal cable of the sensor used at the time of construction of the first reactor, etc., the above work is carried out in a non-radiation state at the time of construction of the reactor, so it is It can be done without any problems.

On the other hand, when the wire rod 11 is to be removed after the test operation of the nuclear reactor is completed, the lifting arm of the clamp 2 fitted to the mounting seat 1 can be remotely operated by a crane or the like. 7 may be pulled up in the direction opposite to the fitting direction at the time of fastening, that is, upward. In this case, the pulling force requires a mechanical force of a certain level or more so that the pulling force exceeds the fastening force of the stopper 8 and the bent portion extends, but a large machine such as a crane can work without any problems.

As a result, the clamp 2 can be detached from the mounting seat 1, and thereafter the wire 11
The wire rod 11 may be removed from the wire rod insertion groove 4 by pulling up.

The mounting seat 1 can be removed by peeling it off with a force greater than the welding strength. In this case, when the welding strength is high and it is difficult to remove the mounting seat 1, there is no risk that the mounting seat 1 will later fall off from the wire rod mounting surface 9, so that no inconvenience occurs even if the mounting seat 1 is left as a permanent installation without removal. In particular, when there is a complicated and difficult-to-remove part such as in a nuclear reactor, the mounting seat 1 is permanently installed to eliminate extra work and improve workability.

5 to 7 show a second embodiment of the present invention.

This embodiment is applied when the wire rod 11 is arranged so as to extend in the horizontal direction.

That is, this embodiment is different from the first embodiment in that the wire rod insertion groove 4 of the mounting seat 1 is formed laterally and the downward opening 12 for straddling the wire rod is formed on the bottom surface side of the clamp 2. It is the point that is formed.

Since the other structure is substantially the same as that of the first embodiment, the same reference numerals as those in the first embodiment are attached to the corresponding portions in the drawing.
The description is omitted.

According to this embodiment, when the wire rod 11 is arranged so as to extend in the horizontal direction, as in the first embodiment,
It is possible to improve workability and safety related to fastening and removal.

In each of the above embodiments, the application of the cable for the sensor installed in the reactor was fixed.
INDUSTRIAL APPLICABILITY The present invention can be easily applied to other parts such as a small-diameter pipe to be installed in a furnace, and can also be applied to various fastenings of various wire rods used in structures other than nuclear reactors.

[0047]

As described above, according to the invention of claim 1,
Wires such as signal cables can be easily and surely fixed to the distribution surface, wire removal work can also be done easily and reliably, and there is no risk of part of the components falling off at parts that are difficult to remove. It can be installed permanently, and the workability, safety, etc. relating to fastening and removing the wire can be improved.

According to the second aspect of the present invention, there is an effect that the wire rod attaching operation can be performed easily, quickly and surely by using the wire rod fastening device.

[Brief description of drawings]

FIG. 1 is a perspective view of an assembled state showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a mounting seat in the embodiment.

FIG. 3 is a perspective view showing a clamp according to the embodiment.

FIG. 4 is a sectional view showing an assembled state in the same embodiment.

FIG. 5 is a perspective view of another embodiment of the present invention in an assembled state.

FIG. 6 is a perspective view showing a mounting seat in the embodiment.

FIG. 7 is a perspective view showing a clamp according to the embodiment.

[Explanation of symbols]

 1 mounting seat 2 clamp 4 wire rod insertion groove 9 wire rod mounting surface 11 wire rod

Claims (2)

[Claims] 1. A mounting seat with a wire rod insertion groove fixed to a wire rod mounting surface, and a clamp fitted to the mounting seat and holding the wire rod in the wire rod insertion groove by the fitting face. A wire rod fastening device characterized by the above. 2. A mounting seat with a wire rod insertion groove is fixed to a wire rod mounting surface, the wire rod is inserted into the wire rod insertion groove of the mounting seat, and then a clamp is fitted to the mounting seat, and the clamp A wire rod fastening method, characterized in that the wire rod is held in a wire rod insertion groove of the mounting seat by a fitting surface.