JPH051936Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a method for installing instrumentation in a guide pipe installed between a remote location and a location that workers cannot access, such as a highly radioactive atmosphere, in a nuclear power plant. This relates to a cable insertion/extraction device used when inserting or pulling out a cable from a guide tube.

(Prior art) The instrumentation needs to be replaced regularly,
In such cases, instruments such as liquid level detectors, thermocouples, probes, etc. may be inserted into the guide tube installed between the remote location and a location inaccessible to workers, such as a highly radioactive atmosphere, or pulled out from the guide tube. I'm going to have a good time.

A conventional device for inserting and extracting instrumentation into a guide tube is explained with reference to Fig. 3. A indicates a guide tube installed between a remote point and a place that cannot be accessed by workers, such as a highly radioactive atmosphere, and b indicates the same guide tube. The insertion/extraction unit c installed at the entrance of guide tube a is an instrument, and by operating the insertion/extraction unit b in the extraction direction, the instrumentation c that has been used until now can be inserted into guide tube a. Then pull it out.
Further, the insertion/extraction unit b is operated in the insertion direction to insert a new instrument c through the guide tube a.

(Problems to be Solved by the Invention) In the conventional device for inserting and withdrawing instruments from the guide tube shown in FIG. 3, when the outer diameters of instruments c are extremely different, It is necessary to replace it with another insertion/extraction unit b that matches the outer diameter. Further, it is necessary to adjust the insertion force and extraction force of the instrumentation c at each instrumentation grasping mechanism section (at a plurality of locations) of the insertion/extraction unit b. Furthermore, the attachment/detachment of the instrumentation c must be performed at each instrumentation gripping mechanism (at multiple locations) of the insertion/extraction unit b.

(Means for Solving the Problems) The present invention addresses the above problems by providing a groove for large diameter cables with a semicircular cross section on the right side, and a groove for small diameter cables with a semicircular cross section on the left side. One receiving fitting provided in the section, and the other receiving fitting provided with a groove for a large diameter cable having a substantially U-shaped cross section on the right side and a groove for a small diameter cable having a substantially U-shaped cross section on the left side; A rotating ring in which one receiving metal fitting and the other receiving metal fitting are attached alternately along the circumferential direction to the outer peripheral edge of the rotating ring, a rotational drive device that rotates the rotating ring, and a rotational drive device that rotates the rotating ring; Left and right guide plates facing each other, left and right guide disks supporting each guide plate so that they can move toward and away from the rotating wheel, and both sides of the rotating wheel near one of the brackets. It is characterized by comprising left and right cable gripping mechanisms attached to the surface, and left and right guide rollers rotatably supported by the cable gripping mechanisms and in contact with the guide plates of the guide disks.

The object of the present invention is that when the cables have extremely different outside diameters, the cables can be inserted and pulled out without requiring replacement of the gripping mechanism. Another object of the present invention is to provide an improved cable insertion/extraction device that allows adjustment of the cable insertion/extraction force and attachment/detachment of the cable from one location.

(Function) The cable insertion/extraction device of the present invention is configured as described above, and when inserting/extracting the cable, the guide disk is moved in the direction away from the rotating ring (opening direction). , After releasing the cable gripping mechanism, insert the cable into the large diameter cable groove or small diameter cable groove of each bracket provided on the outer periphery of the rotating ring, and then move the guide disk in the direction approaching the rotating ring (closed direction). ), close the cable gripping mechanism, hold the cable between the cable groove of the receiving fitting and the cable gripping mechanism, and at the same time adjust and set the guide plate to a position where the necessary insertion or withdrawal force is obtained. , activating the rotational drive device, transmitting the rotation to the rotating wheel, rotating the rotating wheel and the cable gripping mechanism with respect to the guide plate of the guide disk, and repeatedly opening and closing the cable gripping mechanism, Insert the cable into the guide tube or pull it out from the guide tube.

(Embodiment) Next, the cable insertion/extraction device of the present invention will be explained using an embodiment shown in Figs. 1 and 2. 1a in Fig. 1A is a rotating ring; A receiving metal fitting 1b and a receiving metal fitting 1c are alternately attached to the outer peripheral edge along the circumferential direction. As shown in FIGS. 1A and 1B, a large diameter cable groove 1b1 having a semicircular cross section is provided on the right side of the receiving metal fitting 1b, and a groove _1b1 for a large diameter cable with a semicircular cross section is provided on the left side of the receiving metal fitting 1b. A semicircular small diameter cable groove _1b2 is provided. In addition, as shown in Fig. 1A and Fig. 1C, the holder 1c
A groove 1c ₁ for a large-diameter cable with a substantially U-shaped cross section is provided on the right side of the bracket 1c, and a groove 1c ₂ for a small-diameter cable with a substantially U-shaped cross section is provided on the left side of the receiving bracket 1c. . These receiving fittings 1b and 1c are used to hold the large-diameter cable 8 and small-diameter cable 8' into which instruments are inserted or pulled out. Further, cable gripping mechanisms 1d to 1j and 1d' to 1j', which will be described later, are attached to both sides of each of the receiving fittings 1b and 1c. Further, the rotation support shaft 4a is inserted into the shaft hole provided in the boss portion of the rotary wheel 1a and fixed to each other, and the drive gear 2a is fixed to the right side of the boss portion, and the drive gear 2a is fixed to the right side of the boss portion. A rotation angle detection gear 3a is fixed to. In addition, the rotation support shaft 4
a shows the cylindrical fixing fittings 4b, 4b' and the bearing 8.
It is rotatably supported by a and 8a'. Further, 4c and 4c' are holding fittings that hold the bearings 8a and 8a' in the cylindrical fixing fittings 4a and 4a',
On the outer periphery of the cylindrical fixing fittings 4b, 4b', boss portions of guide disks 5a, 5a' for opening and closing the cable gripping mechanisms 1d to 1j and 1d' to 1j' are movable in the axial direction ( The rotary wheel 1a is fitted into the rotary wheel 1a so as to be able to move toward and away from the rotating wheel 1a. Note that 4d and 4d' are slide keys that guide the axial movement of the guide discs 5a and 5a'. Further, nuts 5c, 5c' with mounting arms for moving the guide disks are fixed to the outer ends of the boss portions of the guide disks 5a, 5a'.
Handle bolts 5d and 5d' are screwed into c'. Of the cylindrical fixing fittings 4b and 4b',
The movement range of the mounting arm of nuts 5c and 5c' is as follows:
Notched. In addition, the above-mentioned bolt with handle 5d,
5d' is the holder 5 via bearings 8c, 8c'
The holders 5e, 5e' are rotatably supported by the holders 5e, 5e'.
5e' is fixed to the support legs 6a, 6a' together with the cylindrical fixtures 4b, 4b'. Further, 2b is a gear meshed with the drive gear 2a, and the gear 2b
The shaft integrated with the support tube 2e fixed to the support leg 6a
A sprocket 2c is fixed to the other end of the same shaft, and the sprocket 2c is connected to a sprocket on the rotational drive device (drive motor) side (not shown) via a chain 2d. is connected to. Further, 3b is a gear meshed with the rotation angle detection gear 3a, and 3d
is a mounting tube fixed to the support leg 6a', and 3c is a rotation angle detector installed in the same mounting tube 3d.
b is connected to the rotation angle detector 3c.
In addition, 1e and 1e' are the cable gripping mechanisms 1d to 1.
j and the fingers 1d' to 1j', the same fingers 1e,
1e' is the bracket 1d, 1d' and the support pin 1j, 1
Torsion coil springs 1i, 1 are swingably attached to both sides of the rotating wheel 1a via j', and the fingers 1e, 1e' are wound around support pins 1j, 1j'
It is biased in the opening direction by i'. Attachments 1f, 1f' are fitted into the tips of the fingers 1e, 1e' on the rotating wheel side so as to be slidable in the axial direction, and are biased in the pushing direction by springs 1g, 1g'. Further, guide rollers 1h, 1h' are provided on the opposite side of the fingers 1e, 1e', and the guide rollers 1h, 1h' are connected to the guide disks 5a, 1h'.
It is in contact with sector-shaped guide plates 5b, 5b' that locally protrude from the opposite side surface of 5a'. Note that both sides of the fan-shaped guide plates 5b and 5b' are smooth sloped surfaces. A in FIG. 2 shows the cable grip area.

Next, the operation of the cable insertion/extraction device shown in FIGS. 1 and 2 will be explained in detail. When inserting or pulling out the cable (instrumentation) 8 or 8', the guide disk 5a or 5a' is moved in the opening direction by the handle bolt 5d or 5d', and the cable gripping mechanism 1d-1j or 1d'-1j is moved. ’, then insert the large diameter cable 8 or small diameter cable 8’ into the cable groove 1b ₁ or 1 of the receiving bracket 1b.
b ₂ and the cable groove 1c ₁ or 1c ₂ of the holder 1c. Next, the guide disk 5a or 5a' is moved in the closing direction by the bolt with handle 5d or 5d', and the cable gripping mechanism 1d to 1j or 1
d' to 1j' are closed and the cable 8 or 8' is held between the receiving bracket 1b or 1c of the rotary wheel 1a and the cable gripping mechanism 1d to 1j or 1d' to 1j', and at the same time the guide plate 5a or 5a' After adjusting and setting it to a position where the required insertion force or extraction force is obtained, a rotation drive device (drive motor) (not shown) is started, and its rotation is transferred from chain 2d to sprocket 2c.
→Gear 2b→Transmit to drive gear 2a, rotating wheel 1a
Rotate. This rotation of the rotating wheel 1a causes the cable gripping mechanisms 1d to 1j or 1d' to 1j' to be rotated relative to the guide plate 5b of the guide disk 5a, and the cable gripping mechanisms 1d to 1j or 1d' to
By repeating the opening and closing operations of 1j', the cable 8 or 8' is inserted into or pulled out from the guide tube (see a in FIG. 3).

(Effects of the invention) As mentioned above, when inserting/pulling out a cable, the cable insertion/pulling device of the present invention moves the guide disk in the direction away from the rotating ring (opening direction) and grasps the cable. After opening the mechanism, insert the cable into the large-diameter cable groove or small-diameter cable groove of each bracket provided on the outer periphery of the rotating ring, and then move the guide disk in the direction closer to the rotating ring (closed direction). , close the cable gripping mechanism, and hold the cable between the cable groove of the holder and the cable gripping mechanism, while adjusting and setting the guide plate to a position where the necessary insertion or withdrawal force is obtained, and then rotate. The drive device is started, its rotation is transmitted to the rotating wheel, the rotating wheel and the cable gripping mechanism are rotated relative to the guide plate of the guide disk, and the cable gripping mechanism is repeatedly opened and closed to remove the cable. Because it is inserted into the guide tube and pulled out from the guide tube,
Even if the cables have extremely different outside diameters, the cables can be inserted and pulled out without requiring replacement of the cable gripping mechanism. Further, with the above configuration, there is an effect that adjustment of the cable insertion force and pulling force, and operation of attaching and detaching the cable can be performed at one location.

[Brief explanation of drawings]

FIG. 1A is a vertical cross-sectional side view showing an embodiment of a device for inserting and extracting a cable into a guide tube according to the present invention;
Figure 1B is an enlarged side view of one of the brackets, Figure 1C
Figure 2 is an enlarged side view of the other bracket, and Figure 2 is an enlarged side view of the other bracket.
Side view showing the cable gripping area of the extraction device, No. 3
The figure is a side view schematically showing a conventional device for inserting and extracting an instrument into a guide tube. 1a... Rotating ring, 1b... One bracket, 1b ₁
...Groove for large diameter cable with semicircular cross section, 1b ₂ ...Groove for small diameter cable with semicircular cross section, 1c...Other receiving fitting, 1c ₁ ...Groove for large diameter cable with approximately U-shaped cross section , 1c ₂ ...Small diameter cable groove with approximately U-shaped cross section,
1h, 1h'...Guide roller, 2a, 2b, 2c
...Rotary drive device, 5a, 5a'...Guide disk, 5
b, 5b'...Guide plate, 1d to 1j and 1d' to 1
j′...Cable gripping mechanism.

Claims (1)

[Scope of utility model registration request] One receiver has a groove for large diameter cables with a semicircular cross section on the right side and a groove for small diameter cables with a semicircular cross section on the left side, and a groove for large diameter cables with a roughly U-shaped cross section on the right side. The cross section is approximately U.
The other receiving fitting has a small-diameter cable groove in the shape of a letter on the left side, and the rotating ring has one receiving fitting and the other receiving fitting attached alternately along the circumferential direction on the outer periphery of the rotating ring. , a rotary drive device for rotating the rotary ring, left and right guide plates facing each other across the outer peripheral edge of the rotary ring, and each of the guide plates supported so as to be movable toward and away from the rotary ring. The left and right guide disks, the left and right cable gripping mechanisms attached to both sides of the rotary wheel near one of the holder fittings, and the guide disks rotatably supported by the cable gripping mechanisms. A device for inserting and extracting a cable into a guide tube, characterized by comprising left and right guide rollers that come into contact with a plate.