JPH0663276U - Jig for torque wrench - Google Patents

Abstract

(57) [Summary] [Purpose] Installation work of the operating part on the top of the valve is one
It can be easily and easily and semi-automatically performed by human workers, which saves man-hours and uniforms the tightening force, improves work accuracy, and bends the pipe around the tightening point. Or
Eliminate the risk of damage. [Structure] A groove 2 that can accommodate a valve on the lower surface of the jig body 1.
When the valve is housed in the groove 2 of the jig body 1, a hole 3 formed in the middle of the groove 2 so that the top of the valve is projected out of the upper surface of the jig body 1, The surface is provided with a projection 4 for receiving a reaction force, and the transmission torque is carried by a contact surface 9 formed by both ends of the valve and the inner surface of the groove 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a jig for a torque wrench, and in particular, the jig is used for tightening or loosening a valve operating part which is detachably attached to the top of a valve provided in the middle of a pipe. The present invention relates to a jig for a torque wrench used.

[0002]

[Prior art]

 In the past, at least two workers were required to tighten or loosen the valve operation part with a torque wrench on the top of the valve that is installed in the middle of the pipe. In other words, one person supported the valve and the other one operated the torque wrench. By adopting this method, stable work can be performed, and especially when a large torque needs to be applied to the mounting work, the pipes connected to the front and rear of the valve will bend due to the tightening operation. This is prevented.

[0003]

[Problems to be solved by the device]

 When the operation part is attached to the valve by the above-mentioned conventional method, if the number of pipes and valves to be operated is large, not only will the number of man-hours increase, but also the work will be complicated, so fatigue and other For this reason, uneven tightening force occurs. In addition, even if the work place is one where the foothold is poor and the posture is forced, the work efficiency is poor and an increase in work time cannot be avoided.

Originally, the object of the problem to be solved by the present invention relates to the work of mounting / removing the packless valve provided in the middle of each of the thin tube groups used in the primary system of the nuclear power plant. This is because the quantity is extremely large and the location where the torque wrench is difficult to use, the work posture is not stable, and as a result, the tightening is always performed with the specified tightening force. Is not always the case. In the meantime, since the pipe around the tightened portion is thin and weak, the tightening force may cause the pipe to bend or be damaged. Moreover, in the case of this target issue, there is a demand that work time must be shortened as much as possible, and the development of appropriate jigs that can meet these conditions has been a conventional issue.

The present invention has been made in view of the above problems, and is a small, lightweight work for attaching an operating portion to the top of a valve installed in the middle of a pipe by using a torque wrench. Moreover, by using a jig with an appropriate configuration, (a) it is extremely easy and easy to carry out the work of not only transporting and setting the jig but also mounting it on the valve by one operator. This will reduce the number of 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) By the tightening force of the torque wrench, the tightening force is improved. The purpose is to eliminate the risk of bending or damage to the piping around the attachment point.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, in the torque wrench jig of the present invention, a) tighten or loosen the valve operation part detachably attached to the top of the valve provided in the middle of the pipe with respect to the valve. A jig used for a torque wrench, wherein the jig main body of the jig is opened downward and can cover the valve by accommodating the groove therein. When the valve is housed in the groove of the jig body, the valve has a hole drilled in the middle of the groove to allow the top of the valve to protrude outside the upper surface of the jig body. The contact surface between the valve formed by the inner surface of the groove and the jig body carries the torque transmitted from the torque wrench to the valve.

Alternatively, b) the groove provided open below the jig body may be configured as a plurality of grooves intersecting with each other in the common plane below.

Alternatively, c) a protrusion is provided on the outer surface of the jig body at a position spaced apart from the hole by a predetermined distance, and one end of a component of the wrench when the torque wrench is an automatic torque wrench. It is also possible to adopt a structure in which the reaction force generated in the above is received by the protrusion.

[0010]

[Action]

 Using the torque wrench jig according to claim 1, in order to perform the work of attaching the operation portion to the top of the valve provided in the middle of the pipe, cover the jig body on the valve. By using, the valve and the pipe connected to it are stored in the groove of the jig body as they are. At this time, the top of the valve to which the operating part is attached projects to the outside through a hole formed in the upper surface of the jig body, and this protruding height is a height suitable for operating the torque wrench operating on the jig body. The height of the upper surface of the jig body is made so that

In order to tighten the operating portion with the torque wrench to the top of the protruding valve, for example, by fitting the torque wrench to the nut for tightening the operating portion on the upper surface of the jig body, the nut is tightened. A predetermined torque is applied to. At this time, the torque transmitted from the torque wrench to the nut is also transmitted to the valve itself together with the nut. However, this torque is carried by the contact surface between the valve body and the jig body, which is formed by the inner surface of the groove and the outer surfaces of both ends of the valve housed in the groove, so that the torque continues before and after the valve. It does not bend or damage the pipe even if it reaches the pipe.

If the groove provided in the jig for the torque wrench is configured as a plurality of grooves intersecting with each other in the lower common plane as in claim 2, only one groove is provided. In some cases, the mounting direction of the torque wrench jig is limited to a specific direction depending on the groove direction, and it happens that the specific direction interferes with the mounting of the jig or the work using the jig due to the surrounding space. In the case where the direction is such that the groove comes in, it is very convenient because it is possible to change the mounting direction of the jig by using the other groove that intersects with the groove.

When the torque wrench to be used is an automatic torque wrench using power, a protrusion is provided on the outer surface of the jig body at a position spaced apart from the hole by a predetermined distance, as in claim 3. In this case, the reaction force generated at the one end of the torque wrench is received by this protrusion by abutting one end of the constituent part of the torque wrench on the side surface of the protrusion, so that the torque wrench and the jig body The torque is reliably transmitted and received to and from the peripheral device, and damage to peripheral devices is prevented.

[0014]

【Example】

 Next, an embodiment of the device of the present invention will be described with reference to the drawings. 1 and 2, the main body 1 of the jig has a groove 2 and a groove 2a, which are opened downward, in a relational position orthogonal to each other. A hole 3 that opens to the upper surface of the jig body 1 is formed in the groove 2. Further, a protrusion 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 so that one end of the constituent part of the torque wrench fitted to the tightening target projecting out of the hole 3 comes into a relational position where it comes into contact with the side surface of the protrusion 4. is there.

An example of an object to be mounted with a torque wrench using the device of the present invention having the above-described structure will be described with reference to the chain line in the figure. Is provided. An operating portion 7 is detachably attached to the top of the valve body 6 by a nut 8. In order to attach the operation portion 7 to the top of the valve body 6, the jig body 1 is covered on 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 respectively. The contact surfaces 9 of the valve main body 6 and the jig main body 1 are formed by contacting the peripheral surfaces of the left and right ends of the valve main body 6 with the inner surface of the groove 2 of the jig main body 1. The shape of the jig body 1 is set.

In the embodiment having the above-mentioned configuration, the usage of the torque wrench jig of the present invention will be described. After the hydraulic wrench 10 which is a kind of power-driven automatic torque wrench is fitted to the nut 8. , Supply hydraulic pressure to operate. At this time, by applying one end 11 of the constituent part of the hydraulic wrench 10 to the side surface of the projection 4, the reaction force due to the nut tightening of the hydraulic wrench 10 is received by the side surface. Further, the torque transmitted to the valve main body 6 by tightening the nut is carried by the jig main body 1 at the contact surface 9 between the valve main body 6 and the jig main body 1 and is received by the surface, so that the torque is It does not reach the pipe 5. Therefore, the torque does not bend the pipe or damage the pipe.

The groove 2 a is provided in a direction orthogonal to the groove 2. The two have different grooves and different lengths from each other, which not only widens the size of the valve to be applied, but also contributes to reducing the weight of the jig body 1. For convenience of handling such as transportation, it is desirable to select a light alloy or the like as the material of the jig body 1.

[0018]

[Effect of device]

 Since the jig for a torque wrench according to the present invention is constructed as described above, the use of the jig has the following effects.

(1) According to the configuration of claim 1, the operation of attaching the operation portion to the valve can be performed very easily and easily by the hand of one worker, thereby reducing the number of steps. In addition, the use of the jig simplifies the work and normalizes the work posture. As a result, the tightening force is uniformized by the torque wrench, the work accuracy is improved, and the tightening operation of the torque wrench is performed. It is possible to eliminate the possibility of problems that would otherwise occur, that is, problems such as bending or damage to the pipes around the tightening points.

(2) According to the structure of claim 2, when a plurality of grooves intersecting each other are provided in the common plane below the jig body, when only one groove is provided, Depending on the direction, the mounting direction of the jig for the torque wrench is limited to a certain specific direction, so it is inconvenient that the specific direction happens to interfere with the mounting of the jig due to the surrounding space. However, it is possible to change the mounting direction of the jig by using the other groove that intersects with the groove, and the range of application is expanded, which is very convenient.

(3) According to the structure of claim 3, when the torque wrench to be used is an automatic torque wrench, one end of the constituent part of the torque wrench is brought into contact with the side surface of the protrusion provided on the outer surface of the jig body. By setting it, the reaction force generated at one end of the component is received by this protrusion, so that torque can be reliably transmitted and received between the torque wrench and the jig body, and damage to peripheral devices is prevented. To be done.

[Brief description of drawings]

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

2 is a vertical cross-sectional view of the device of FIG.

[Explanation of symbols]

 1 Jig body 2, 2a Groove 3 Hole 4 Protrusion 9 Contact surface

Claims (3)

[Scope of utility model registration request] 1. A jig used in a torque wrench for tightening or loosening an operating portion of a valve, which is detachably attached to a top portion of a valve provided in the middle of a pipe, the jig being a jig. The jig main body of the tool has a groove which is opened downward and can accommodate the valve therein by covering it on the valve, and when the valve is accommodated in the groove of the jig main body, the jig top is fixed. A contact surface between the valve and the jig body, which is provided with both ends of the valve accommodated in the groove and the inner surface of the groove, and which has a hole formed in the groove in the middle so as to protrude outside the upper surface of the body. A torque wrench jig characterized in that the torque transmitted from the torque wrench to the valve is carried by the jig. 2. The jig for a torque wrench according to claim 1, wherein the groove provided open below the jig body is formed as a plurality of grooves intersecting with each other in a common surface below the groove. 3. A protrusion is provided on the outer surface of the jig body at a position spaced from the hole by a predetermined distance, and is generated at one end of a constituent part of the torque wrench when the torque wrench is an automatic torque wrench. The torque wrench jig according to claim 1 or 2, wherein a reaction force is received by the protrusion.