JP2731300B2 - Handling equipment for clamps for connecting pipes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[Object of the Invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing vibrations in a nuclear power plant, for example, piping immersed in cooling water in a reactor pressure vessel or piping installed at an unreachable high place. The present invention relates to a handling device for a pipe connection clamp to be used.

[0003]

2. Description of the Related Art Various small-diameter pipes are established in a reactor pressure vessel. When these pipes are damaged by vibration, it is desirable to replace them with new pipes by remote control because they are in the radiation field.

Conventionally, such an operation is performed by welding or flange connection underwater or at a high place. That is, when the nuclear power plant is operated continuously for a long time, vibrations occur in the pipes that are in the forest by some cause. If these are left as they are, they proceed further and cracks may occur in the piping. It is not preferable to keep such a state in a nuclear power plant. For this reason, a new pipe is replaced or a connection clamp is performed, but at present, it relies on a manual operation of an operator.

[0005]

The welding of pipes and the joining of flanges underwater or at high places involve a number of difficulties.
In other words, the work of connecting and clamping pipes to each other to reduce vibration is extremely difficult and time consuming in places where there are many pipes standing in narrow places under water or high places under water. There are issues that need to be addressed. In addition, in the case of a narrow place in a reactor pressure vessel, there is a problem that it is necessary to consider measures for radiation exposure of workers.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems.
An object of the present invention is to provide a pipe connecting clamp handling device which can omit welding and the like and can connect and clamp pipes to each other. [Configuration of the Invention]

[0007]

SUMMARY OF THE INVENTION The present invention relates to a main body,
A first cylinder integrally pinned to the body;
A connecting rod vertically connected to one cylinder and the connecting rod;
A second cylinder pin-connected in parallel to the rod and
A third cylinder and a lower end of the main body,
Ring-shaped heater movably mounted in the right angle direction
And the inside of the ring-shaped heater and the lower end of the main body.
An angularly inserted clamp shaft and this clamp shaft
A pair of clamp plates attached to the tip of the shaft,
An intervening member is provided between a pair of clamp plates and the ring-shaped heater.
And a shape memory alloy attached to the clamp shaft,
The clamp shaft, which is pin-connected to a tip of the connecting rod,
And a clamp shaft moving claw that moves the
Receiving the reaction force of the crankshaft moving claw of the second shaft.
The clamp is provided at the tip of the
A lever inserted into a groove formed in the shaft;
The pair of clans incorporated in the lower end of the cylinder 3
A clamp plate opening claw for opening the clamp plate
And

[0008]

First, the clamp shaft for pipe connection is inserted into the ring-shaped heater incorporated in the main body. Next, in order to hold and fix the clamp shaft for pipe connection, a lever is inserted into a groove provided in the shaft. In this state, it moves together with the handling device near the pipe to be clamped, and attaches a pipe coupling clamp to the pipe. Then, the first and second cylinders are operated to press the clamp with the claws for moving the clamp shaft . Heating Then the <br/> shape memory alloy by applying a current to the ring-shaped heater in this state, contracting inner diameter of the shape memory alloy
The shape memory alloy is crimped to the clamp shaft and fixed
Thus, the shape memory alloy and the clamp shaft are integrated.
With this fixation, take in advance the clamp shaft
The pair of clamp plates that are worn are also fixed.
A pipe to be clamped plates and clamps can be completely coupled.

Next, the current of the heater is cut off to make the first and
The cylinder 2 is operated to return the clamp shaft moving pawl to its original state, and the lever is also pulled up to its original position. Then, the third cylinder is operated to open the clamp plate opening claw.
After opening the clamp plate with , the main body is moved in the direction of the clamp shaft so that the pipe connecting clamp and the main body can be separated. The above operation is performed remotely.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a pipe connecting clamp handling apparatus according to the present invention will be described with reference to FIGS.
1 is an elevational view showing the entirety of a clamp handling apparatus for connecting pipes according to the present invention, FIG. 2 is an elevational view showing a side surface of FIG. 1, and FIG. It is.

Reference numeral 1 denotes a main body of a pipe connecting clamp handling device, and a first cylinder 2 is rotatably mounted on the main body 1 by a first pin 3 from above. A connecting rod 5 is vertically connected to a tip of a shaft 4 attached to the first cylinder 2, and a claw 8 is connected to a tip of the connecting rod 5 via a second pin 6. Is a mechanism which can reciprocate in the direction of the pipe connecting clamp shaft 24 by means of the third pin 7. In parallel with the connecting rod 5, the second cylinder 11 is connected to the connecting cylinder 5 via a fourth pin 10.
A lever is attached to the end of the second cylinder 11
12 is installed to move up and down.

Since the upper portion of the second cylinder 11 is only supported by the fourth pin 10, the entire structure is a mechanism that swings like a pendulum. Further, a third cylinder 14 is provided on the opposite side of the second cylinder 11 in parallel with the connecting rod 5, and the third cylinder 14 is fixed to the connecting rod 5 via a fifth pin 13.

An opening claw 15 of a pipe connection clamp is incorporated at a lower end of the third cylinder 14. A ring-shaped heater 9 is incorporated at the lower end of the main body 1, and an eyebolt 16 for lifting is attached to the upper part.

Next, a description will be given of a method of attaching a pipe connecting clamp to the pipes at a high place or the pipes 20 and 21 installed underwater. As shown by the dotted line in FIG. 3, the pipe connection clamp includes a pair of pipe clamp plates 22 , 23 sandwiching the pipes 20, 21 from both sides, and the pair of pipe clamp plates 22, 23.
And a shape memory alloy 25 attached to the shaft 24. A thermometer 26 is inserted into the shaft 24.

FIG. 3 is a cross-sectional view showing a state in which the pipe connecting clamp is incorporated in the handling device. In FIG.
Clamping plates 22 and 23 attached in advance the clamp shaft 24 within the bore of the ring-shaped heater 9 that is formed integrally with
Then, the second cylinder 11 is driven through the shape memory alloy 25 and the lever 12 is inserted and held in the groove 27 formed in the lower end of the clamp shaft 24. In this state, it is suspended using the eyebolts 16 and 16 incorporated in the upper part of the main body 1, and a pipe coupling clamp is set on the pipes 20 and 21. Then the first
, The clamp shaft moving claws 8 are operated, and the clamp plates 22 and 23 are tightened to connect with the pipes 20 and 21. When the shape memory alloy 25 is heated by energizing the ring-shaped heater 9 in this state , the shape memory alloy 25 contracts and is clamped.
It is fixed to the shaft 24 and integrated.

The temperature during heating can be confirmed by a thermometer 26 inserted in the clamp shaft 24 in advance. The power supply to the heater 9 is stopped, the first cylinder 2 is returned to the original position, and the second cylinder 11 is returned to the original position.

Next, the entire handling apparatus can be separated from the clamp plates 22 and 23 by moving the handling apparatus in the direction of the shaft 24. If it is necessary to remove the clamp plates 22 and 23 from the pipes 20 and 21 after setting them, the third cylinder 14 is driven,
By pressing down the opening claw 15, the clamp plates 22 and 23 are kept open, and the clamp plates 22 and 23 are removed from the pipes 20 and 21.
23 can be separated.

[0018]

According to the present invention, it is possible to securely connect and clamp a pipe provided in a forest at a high place or a narrow place under water by remote control. As a result, vibrations of the pipes and the like can be prevented, and the plant and the devices can be safely operated.

[Brief description of the drawings]

FIG. 1 is an elevation view showing one embodiment of a remote control device for a coupling clamp according to the present invention.

FIG. 2 is an elevation view showing a side surface of FIG. 1;

FIG. 3 is a cross-sectional view cut along the direction of arrows AA in FIGS. 1 and 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... 1st cylinder, 3 ... 1st pin, 4 ...
Shaft, 5 ... connecting rod, 6 ... second pin, 7 ... third pin, 8 ... claws for moving the clamp shaft , 9 ... ring-shaped heater, 10 ... fourth pin, 11 ... second cylinder, 12 ... Lever, 13 ... Fifth pin, 14 ... Third cylinder, 15 ... Clan
Claws for opening the board , 16 ... eye bolts, 20,21 ... piping, 22,23
... Clamp plate, 24 ... Clamp shaft, 25 ... Shape memory alloy, 26 ... Thermometer, 27 ... Groove.

Claims (1)

(57) [Claims] 1. A body and a pin connected integrally to the body.
A first cylinder and a vertical
Connected connecting rods and pins
A combined second and third cylinder, and
The lower end of the main body can be moved at right angles to the main body
And a ring-shaped heater attached to the
And a clamp for inserting the lower end of the main body in a right angle direction
Shaft and attached to the tip of this clamp shaft.
A pair of clamp plates, and the pair of clamp plates
Between the clamp shaft and the
A pin is connected to the attached shape memory alloy and the tip of the connecting rod.
A clamp that moves the clamp shaft horizontally
Claw for moving the pump shaft and this
Upon receiving the reaction force of the pawl, the tip of the second cylinder moves up and down automatically.
And is inserted into a groove formed in the clamp shaft.
A lever to be inserted and a lower end of the third cylinder.
Clamp plate opening to open the pair of clamp plates
And a clamp for connecting pipes, comprising:
Handling equipment.