JPH0630370Y2 - Thimble insertion / removal device - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> The present invention is applied to the withdrawal work and the insertion work of the inner tubular body in the double tube for measurement, which is composed of the outer tube and the inner tubular body inserted into the outer tube. Related to the insertion / removal device.

<Prior Art> In a so-called in-core flux monitor for measuring the in-core neutron flux of a nuclear reactor, an outer tube, that is, an inner tube, that is, a thimble is inserted into a conduit tube, and a neutron flux is attached to its tip. A detector is installed.

This thimble is inserted in a conduit tube, and the pulling out and insertion work of this thimble have conventionally been performed by a worker using a tool. That is, the tool is attached to the conduit tube, and the thimble is pulled out by moving the thimble in the axial direction with the operation handle while holding the thimble with the spring force. When the thimble is inserted, the tool is removed from the pulled thimble, the mounting direction of the tool with respect to the conduit tube is changed, and then the thimble is mounted on the tool again to mount the thimble on the conduit tube.

<Problems to be solved by the invention> In such a conventional thimble extraction and insertion tool, since the direction in which the thimble is moved relative to the tool is one direction, the extraction operation and the insertion operation are performed continuously. It was necessary to reverse the tool and change the mounting direction each time. Further, at this time, the thimble has to be removed from the tool, which not only makes the extraction and insertion work troublesome, but also requires a long working time.

It is also possible to attach a drive mechanism such as an air cylinder to the tool to automate the work in order to improve the work efficiency, but in this case, the tool is large and heavy, which hinders the reversing work of the tool. .

The present invention solves such a problem, and an object of the present invention is to provide a thimble insertion / removal device capable of easily extracting and mounting the thimble.

<Means for Solving the Problems> The thimble insertion / removal device according to the present invention for achieving the above-mentioned object has a support rod having tool attachment portions at both ends and a support rod slidably supported by the support rod. A sliding metal fitting, a switching lever rotatably supported by the sliding metal fitting, and a cam surface formed at one end rotatably supported by the sliding metal fitting and the other end being neutral to the switching lever via a spring. A lock member that is held in a position, and a sliding member that is movably supported by the sliding metal fitting in a direction orthogonal to the longitudinal direction of the support rod, has a holding portion at one end for holding a thimble between the sliding metal fitting, and the other end. A pressing metal member having a cam surface on which the cam surface of the lock member acts is formed, a link whose one end is supported by the sliding metal member so as not to rotate relative to the lock member, and between the link and the supporting rod. Intervening operation mechanism It is characterized by having and.

<Operation> When pulling out the thimble, when the switching lever is turned to the pulling-out side of the thimble, the lock member also turns in the same direction,
The cam surface moves the pressing metal fitting to hold the thimble by the holding part and the sliding metal fitting. After that, the lock member is rotated by the operating mechanism via the link to further strengthen the holding of the thimble by the pressing metal fitting, and the sliding metal fitting is moved along the support rod to pull out the thimble.
When inserting the thimble, the thimble is inserted by rotating the switching lever to the insertion side to hold the thimble and moving the sliding metal fitting in the direction opposite to the above by the mechanism.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view of a thimble insertion / removal device according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a III-I of FIG.
II sectional view and FIG. 4 are explanatory views of operation.

As shown in FIGS. 1 to 3, the support bar 11 is a flat plate and has a rod-like shape.
2 are arranged in a row. The tool mounting portion 12 is rotatably inserted into a mounting hole of a tool mounting base (not shown) to support the thimble insertion / removal device at a predetermined position.

One end of a sliding fitting 13 located in a direction orthogonal to the support rod 11 is slidably fitted to the support rod 11. A switching lever 14 is located on the sliding member 13, a lock member 15 is located on the switching lever 14, and a support shaft 16 integrally fixed to the locking member 15 penetrates the switching lever 14 and the sliding member 13. By doing so, the switching lever 14 and the lock member 15 are rotatably supported by the sliding fitting 13. A cam surface 17 is formed at one end of the lock member 15, and the other end is held by the switching lever 14 via a spring 18 so that the lock member 15 is held at a neutral position with respect to the switching lever 14. .

A pressing metal fitting 19 is slidably supported on the sliding metal fitting 13 in a direction orthogonal to the longitudinal direction of the support rod 11, and the spring 2
It is biased by 0 in the direction of approaching the lock member 15. A semi-circular holding part 21 for holding the thimble 1 with the sliding metal fitting 13 is formed at one end of the pressing metal fitting 19, and a cam surface 17 of the lock member 15 on which the cam surface 17 acts at the other end. 22 is formed.

Further, one end of the first link 23 is fixed to the tip end portion of the support shaft 16 and is connected to the lock member 15 so as not to rotate relative thereto. On the other hand, one end of an operating handle 24 as an operating mechanism is rotatably supported on one side of the support rod 11, and an intermediate portion of the operating handle 24 and the other end of the first link 23 form a second link. They are connected by 25. And
This operation handle 24 has an operation handle extension pipe 26.
Is installed.

Incidentally, 27 is a fixing screw for fixing the switching lever 14 at an intermediate position.

In the thimble insertion / removal device of the present embodiment described above,
To pull out the attached thimble 1, first, the thimble insertion / removal device is fixed at a predetermined position, and the thimble 1 is inserted between the sliding metal fitting 13 and the holding portion 21 of the pressing metal fitting 19.
The switching lever 14 is rotated counterclockwise as shown in FIG. Then, the lock member 15 also rotates via the spring 18, and the cam surface 17 of the lock member 15 also rotates.
The cam surface 22 of 9 is pressed and pressed against the cam surface 22 to move the pressing fitting 19 to the right in FIG. As a result, the thimble 1 is held between the sliding fitting 13 and the holding portion of the pressing fitting 19.

Next, the operation lever 24 is rotated clockwise in FIG. Then, the lock member 15 further rotates in the same direction via the second link 25 and the first link 23, and the thimble 1 is firmly held by the pressing fitting 19. Then, when the operation lever 24 is further rotated in the same direction, the sliding fitting 13 moves upward along the support rod 11 in FIG. 4 and the thimble 1 can be pulled out.

In order to insert the thimble 1, first, the switching lever 14 is rotated in the opposite direction to the above, that is, in the clockwise direction of FIG. After that, the thimble 1 can be inserted by rotating the operation lever 24 in the opposite direction, that is, in the counterclockwise direction in FIG. 1 to move the sliding fitting 13 downward in FIG.

FIG. 5 is a front view of a thimble insertion / removal device according to another embodiment of the present invention, FIG. 6 is a side view thereof, and FIG. 7 is a system diagram of an operating circuit. The same members as those in the above-described embodiment are designated by the same reference numerals, and duplicate description will be omitted. Further, in FIG. 7, the solid line represents piping of the pneumatic system, and the dotted line represents wiring of the electrical system.

The thimble insertion / removal device of the present embodiment is effective when pulling out or inserting the long thimble 1. As shown in FIGS. 5 and 6, one end of the first link 41 is fixed to the tip portion of the support shaft 16 and is connected to the lock member 15 so as not to rotate relative thereto. On the other hand, one side of the support rod 11 is an air cylinder 4 as an operation mechanism that is substantially parallel to the support rod 11.
2 are provided. Further, one end of the fixed side cylinder 43 is connected to the first link 41, and one end of the moving side rod 44 is connected to the support rod 11. Therefore,
The operation of the air cylinder 42 allows the first link 41 to be rotated.

As shown in FIG. 7, the air supply / exhaust holes 5 of the air cylinder 42
A pneumatic pressure control device 54 is provided to the motors 1, 52 via a pneumatic hose 53.
Are connected. That is, an air pressure supply source 55 composed of a filter and a briquer is connected to an air pressure adjusting portion 56 composed of a pressure adjusting valve and a pressure gauge, and is divided into two parts, one of which is a continuous drive electromagnetic switching valve for switching an operation mode. 57 and the air cylinder 42 is connected to the air supply / exhaust hole 52 of the air cylinder 42 via an electromagnetic switching valve 58 that repeatedly expands and contracts. The other is connected to the air supply / exhaust hole 51 of the air cylinder 42 via an intermittent drive electromagnetic switching valve 59 for switching the operation mode and a manual switching valve 60 for expanding and contracting the air cylinder 42.

Further, detectors 61 and 62 are attached to the stroke end of the piston rod 44 of the air cylinder 42. An operating portion 63 for operating the pneumatic control device 54 is connected to each of the detectors 61 and 62. That is, each detector 61, 62
The expansion / contraction switching relay 64 of the air cylinder 42 is connected to the expansion / contraction switching relay 64. The expansion / contraction switching relay 64 is connected to the expansion / contraction display lamp 65 and the electromagnetic switching valve 58. Further, an expansion / contraction switching lever 66 is arranged adjacent to the expansion / contraction display lamp 65, and a manual switching valve 60 is connected to the expansion / contraction switching lever 66. Further, the changeover switch 67 connected to the continuous drive electromagnetic changeover valve 57 and the intermittent drive electromagnetic changeover valve 59, the pressure adjuster 68 of the pressure adjusting valve of the air pressure adjusting unit 56, and the pressure display 69 of the pressure gauge. Is provided.

In the thimble insertion / removal device of the present embodiment described above,
To pull out the attached thimble 1, first, the thimble insertion / removal device is fixed at a predetermined position, and the thimble 1 is inserted between the sliding metal fitting 13 and the holding part 21 of the pressing metal fitting 19.
The switching lever 14 is rotated counterclockwise in FIG. Then, similarly to the above-described embodiment, the pressing fitting 19 moves, and the thimble 1 is held by the sliding fitting 13 and the holding portion 21 of the pressing fitting 19.

Next, the changeover switch 67 is made continuous, and pressurized by the air pressure adjusting section 56, and this pressurized air is supplied to the air supply / exhaust hole 52 of the air cylinder 42 via the continuous drive electromagnetic switching valve 57 and the electromagnetic switching valve 58. Supply. Then, the air cylinder 42 is repeatedly expanded and contracted by the detectors 61 and 62 and the electromagnetic switching valve 58. At this time, when the air cylinder 42 is extended, the sliding metal fitting 13 is inserted through the first link 41.
Moves upward in Fig. 5 and the thimble 1 is pulled out,
When the air cylinder 42 is contracted, the switching lever 14 is rotated clockwise in FIG. 5 via the first link 41 and the lock member 15, the holding of the thimble 1 is released, and only the sliding fitting 13 is moved downward in FIG. It will be moved. Therefore, the thimble 1 is pulled out by the continuous operation of the air cylinder 42.

Then, after the thimble 1 is pulled out to an appropriate position, the operation of the air cylinder 42 is stopped by the changeover switch 67, and this time the changeover switch 67 is intermittently operated so that the pressurized air is intermittently driven by the electromagnetic switching valve 59 for manual drive and the human power. Type switching valve 60
The air is supplied to the air supply / exhaust hole 51 of the air cylinder 42 via the. Then, the operator manually operates the switching lever 67 while watching the telescopic display lamp 65 to intermittently operate the air cylinder 42 to adjust the final withdrawal position of the thimble 1.

In order to insert the thimble 1, first, the switching lever 14 is rotated in the opposite direction, that is, clockwise in FIG. 5, to hold the thimble 1. After that, the thimble 1 can be inserted by operating the air cylinder 42 in the same manner as described above.

Thus, by continuously reciprocating the piston cylinder 42, the long thimble 1 can be easily pulled out or inserted.

Also, by disposing a piston cylinder instead of the operating lever, it is possible to automate the thimble insertion / removal work. Furthermore, when this insertion / removal device is used in a nuclear reactor, this insertion / removal work can be operated remotely. As a result, it is possible to reduce the exposure of workers.

In addition, depending on the turning position of the switching lever 14, the thimble 1
Since the moving direction can be switched, the position of pulling out or inserting the thimble 1 can be adjusted by switching the switching lever 14 and operating the piston cylinder 42 at any time.

<Effects of the Invention> As described above in detail with reference to the embodiments, according to the thimble insertion / removal device of the present invention, the sliding metal fittings are slidably supported by the supporting rods having the tool mounting portions at both ends. , This sliding metal fitting is provided with a switching lever for switching the moving direction of the thimble and a pressing metal fitting that holds the thimble, and one end of the link is supported by the sliding metal fitting, and an operating mechanism is interposed between this link and the support rod. Since the sliding mechanism is slid by this operation mechanism so that the thimble can be pulled out and inserted, the thimble can be pulled out, inserted and the thimble can be held and released without changing the mounting direction of the insertion / removal device. Work can be done easily and surely.
The work time can be shortened, and the workability of the thimble insertion / removal work can be improved.

[Brief description of drawings]

FIG. 1 is a front view of a thimble insertion / removal device according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a III-I of FIG.
II sectional view, FIG. 4 is an explanatory view of operation, FIG. 5 is a front view of a thimble insertion / removal device according to another embodiment of the present invention, FIG. 6 is a side view thereof, and FIG. 7 is a system of an operating circuit. It is a figure. In the drawings, 1 is a thimble, 11 is a support rod, 12 is a tool mounting portion, 13 is a sliding fitting, 14 is a switching lever, 15 is a locking member, 17 is a cam surface, 18 is a spring, 19 is a pressing fitting, and 21 is a grip. Reference numeral 22 is a cam surface, 23 and 41 are first links, 24 is an operating handle (operating mechanism), 25 is a second link, and 42 is a piston cylinder (operating mechanism).

Claims (1)

[Scope of utility model registration request] 1. A support rod having tool attachment portions at both ends, a sliding metal member slidably supported by the supporting rod, a switching lever rotatably supported by the sliding metal member, and the sliding metal member. A lock member that is rotatably supported on the one end and a cam surface is formed on one end and the other end is held by the switching lever at a neutral position via a spring; and the sliding fitting is orthogonal to the longitudinal direction of the support rod. A pressing metal fitting which is movably supported in a direction and has a holding portion for holding a thimble between the sliding metal fitting at one end, and a cam surface on which the cam surface of the lock member acts is formed at the other end; A thimble insertion / removal device comprising a link supported by the sliding fitting so as not to rotate relative to the lock member, and an operation mechanism interposed between the link and the support rod.