JP2599620Y2 - Jig for torque wrench - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for a torque wrench, and more particularly, to a jig for a torque wrench, which is provided with an operating portion of a valve detachably mounted on a top of a valve interposed in a pipe. The present invention relates to a jig for a torque wrench used for tightening or loosening.

[0002]

2. Description of the Related Art Conventionally, at least two workers are required to tighten or loosen a valve operating portion using a torque wrench at the top of a valve interposed in a pipe. Was. That is, one person supports the valve and the other one
This is because people used a method of operating a torque wrench. By adopting this method, it is possible to perform stable work, especially when it is necessary to apply a large torque to the mounting work, pipes connected before and after the valve may bend with the tightening operation, etc. Is prevented.

[0003]

When the operation unit is mounted on the valve by the above-described conventional method, when the number of pipes and valves to be worked is large, not only the number of man-hours is increased but also the work is increased. , The tightening force is uneven due to fatigue and other reasons. Further, even when the work place is a place with a poor scaffold and an unreasonable posture is forced, the work efficiency is poor, and an increase in work time is inevitable.

[0004] The object of the present invention to be solved by the present invention is to mount and install a packless valve in the middle of each of the narrow tube groups used in the primary system of a nuclear power plant.
This is related to the removal work, which is a very large quantity, and is a place where it is difficult to use a torque wrench in place. Therefore, the working posture is not stable, and as a result, a predetermined tightening force is not always accurate. Is not always performed. In addition, since the pipe around the tightening location is thin and weak, the pipe may be bent or damaged by the tightening force. In addition, in the case of this subject, there is a demand that the working time must be reduced as much as possible, and the development of an appropriate jig that can satisfy these conditions has been a conventional problem.

The present invention has been made in view of the above-mentioned problem, and is a small-sized and light-weight operation for attaching an operation section to a valve provided in the middle of a pipe by using a torque wrench on the top of the valve. By using a jig with an appropriate configuration, it is possible to (a) use one operator's hand to transport and set the jig, as well as to install it on the valve very easily and semi-automatically. This saves man-hours.

(B) By simplifying the work and normalizing the work posture, the tightening force by the torque wrench is made uniform and the work accuracy is improved. (C) The tightening force of the torque wrench is It is an object of the present invention to eliminate the possibility that the pipe around the attachment point is bent or damaged.

[0007]

In order to achieve the above object, for before Symbol eye achievement,
In the torque wrench jig according to the first aspect, a jig used for a torque wrench for tightening or loosening an operation portion of a valve detachably attached to a top of a valve provided in the middle of a pipe with respect to the valve. A jig body of the jig, wherein the jig body is opened downward and covers the valve so that the valve can be accommodated therein, and the valve is accommodated in the jig body groove. A hole drilled in the middle of the groove to project the top of the valve out of the upper surface of the jig body ;
A groove is formed in contact with both ends of the valve housed in the groove.
To carry the torque transmitted from the torque wrench to the valve
And the inner surface .

[0008] Alternatively, as claimed in claim 2, the groove provided in the opening below the jig body may be configured as a plurality of grooves which cross each other in a common plane of said lower.

Alternatively, as described in claim 3, furthermore,
Serial provided from said bore a on the outer surface of the jig main body at a position at a predetermined interval, receiving a reaction force which the torque wrench is generated at one end of the structure portion of the wrench in the case of automatic torque wrench It is also possible to provide a configuration having projections for stopping.

[0010]

According to the first aspect of the present invention, in order to perform the operation of mounting the operating portion on the top of the valve provided in the middle of the pipe using the jig for the torque wrench of the first aspect, the jig body is covered on the valve. By covering, the valve and the pipe connected to it are housed in the groove of the jig body as it is. At this time, the top portion on which the operating portion of the valve is mounted protrudes outside through a hole formed in the upper surface of the jig main body, and the protruding height is a height suitable for operation of the torque wrench operated on the jig main body. The height of the upper surface of the jig body is made so as to be as described above.

In order to tighten the operating portion with a torque wrench on the top of the protruding valve, a torque wrench is fitted to, for example, a nut for tightening the operating portion on the upper surface of the jig main body. A predetermined torque is applied to.
At this time, the torque transmitted from the torque wrench to the nut is transmitted to the valve itself together with the nut.
However, since this torque is carried by the contact surface between the valve and the jig main body formed by the inner surface of the groove and the outer surfaces of both ends of the valve housed in the groove, the torque is applied to piping connected to the front and rear of the valve. The pipe does not bend or damage the pipe.

The groove provided on the jig for the torque wrench is
When the groove is formed as a plurality of grooves intersecting each other in the lower common plane as in claim 2, the mounting direction of the torque wrench jig depends on the direction of the groove when only one groove is provided. If the direction is limited to a specific direction and the specific direction happens to be a direction that hinders the installation of the jig or the work using the jig due to the surrounding room, etc. By using the other groove that intersects, the mounting direction of the jig can be changed, which is very convenient.

In the case where the torque wrench to be used is an automatic torque wrench driven by power, a projection is provided at a position at a predetermined distance from the hole on the outer surface of the jig body. In other words, by contacting one end of the component of the torque wrench with the side surface of the projection, the reaction force generated at the one end of the torque wrench is received by this projection, so that the torque wrench and the jig body are Is reliably transmitted and received, and damage to peripheral devices is prevented.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. 1 and 2, the jig main body 1 has a groove 2 and a groove 2a which are opened downward in positions perpendicular to each other. A hole 3 opening in the upper surface of the jig main body 1 is formed in the middle of the groove 2. In addition, a projection 4 is provided on the outer surface of the jig body 1 at a position spaced from the hole 3 by a predetermined distance. The predetermined interval is an interval set such that one end of the component of the torque wrench fitted to the object to be tightened, which protrudes out of the hole 3, is at a position where the one end contacts the side surface of the projection 4. .

An example of an object to be mounted with a torque wrench using the device of the present invention having the above-described configuration is as follows.
Explaining what is indicated by the chain line in the figure, the pipe 5
Is provided with a valve body 6 in the middle thereof. An operation unit 7 is detachably attached to the top of the valve body 6 by a nut 8. In order to attach the operation unit 7 to the top of the valve body 6, the jig body 1 is covered over the valve body 6 so that the top of the valve body 6 projects outside the hole 3 and is connected to the pipe 5. The contact surfaces 9 between the valve body 6 and the jig body 1 are formed such that the respective peripheral surfaces of the left and right ends of the valve body 6 and the inner surface of the groove 2 of the jig body 1 contact each other. The shape of the jig body 1 is set.

In the embodiment having the above structure, the use of the jig for a torque wrench of the present invention will be described.
Is fitted to the nut 8 and then supplied with hydraulic pressure for operation.
At this time, one end 11 of the component of the hydraulic wrench 10 is
The reaction force accompanying the nut tightening of the hydraulic wrench 10 is received by the side surface. The torque transmitted to the valve body 6 by tightening the nut is carried by the jig body 1 on the contact surface 9 between the valve body 6 and the jig body 1 and received by the surface. Will not be transmitted to Therefore, the torque does not cause bending or damage to the piping.

The groove 2a is provided in a direction orthogonal to the groove 2. Both have different groove widths and lengths, thereby increasing the size of the valve to be applied to a plurality of types and contributing to a reduction in the weight of the jig body 1. The jig body 1 is used for convenience of handling such as transportation.
It is desirable to select a light alloy or the like for the material of the above.

[0018]

Since the jig for the torque wrench according to the present invention is constructed as described above, the following effects are obtained by using the jig.

(1) According to the structure of the first aspect, the operation of attaching the operating section to the valve can be performed very easily and easily by a single operator, thereby realizing a reduction in man-hours. In addition, the use of the jig simplifies the work and normalizes the working posture. As a result, the tightening force by the torque wrench is made uniform, the work accuracy is improved, and the tightening operation of the torque wrench is performed. It is possible to eliminate the problem that may occur in the past, that is, the problem that the pipe around the fastening portion is bent or damaged.

(2) According to the second aspect of the present invention, if a plurality of grooves which intersect each other are provided in the common plane below the jig main body, if only one groove is provided, the groove is formed. Since the mounting direction of the torque wrench jig is limited to a specific direction depending on the direction, the inconvenience such that the specific direction happens to hinder the mounting of the jig due to the surrounding room or the like occurs. Although it may occur, the use of another groove that intersects the groove makes it possible to change the mounting direction of the jig, and the application range is expanded, which is extremely convenient.

(3) According to the third aspect of the invention, when the torque wrench to be used is an automatic torque wrench, one end of a component of the torque wrench is in contact with a side surface of a projection provided on the outer surface of the jig body. Thus, the reaction force generated at one end of the component is received by the projection, so that the torque is reliably transmitted and received between the torque wrench and the jig main body, and the peripheral device is prevented from being damaged. You.

[Brief description of the drawings]

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

FIG. 2 is a longitudinal sectional view of the apparatus of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Jig main body 2, 2a Groove 3 Hole 4 Projection 9 Contact surface

Claims (3)

(57) [Scope of request for utility model registration] 1. A jig used for a torque wrench for tightening or loosening an operation portion of a valve detachably attached to a top portion of a valve interposed in a pipe with respect to the valve. The jig body of the jig has a groove which can be accommodated therein by being opened downward and covering the valve, and a jig for fixing the top of the valve when the valve is accommodated in the jig body groove. a hole bored in the middle of the groove in order to project out of the upper surface of the body, the opposite ends of the valve formed in the groove and received in the groove against
Touch to transmit the torque transmitted from the torque wrench to the valve.
A jig for a torque wrench characterized by having an inner surface to hold . Wherein said said groove provided in the opening below the jig main body, jig torque wrench of claim 1, wherein configured as a plurality of grooves which cross each other in a common plane of the lower. 3. Further, provided in a position spaced a predetermined distance from said hole a on the outer surface of the jig body, before
Zona projections serial torque wrench stops accept a reaction force generated at one of the components of the wrench in the case of automatic torque wrench
The jig for a torque wrench according to claim 1 or 2, wherein