JPH08296776A - Piping connector - Google Patents

Abstract

PURPOSE: To automatically accurately align a piping shaft with a detector shaft by interposing an insert to align center positions of opposing piping centers with each other between a fixer for fastening opposing flanges to each other and the piping. CONSTITUTION: In opposing pipings connected to a flange 14 mounted to a detector body 12, a locating U-shaped jig of an insert for aligning the center positions of the opposing pipings with each other is interposed between a connecting bolt 13 and the detector body 12. In mounting after the connecting bolt 13 is moved in intimate contact with the outside of a bolt hole 15 provided in a predetermined position of the flange 14, the locating jig 11 is put on a head of the connecting bolt 13. Next, while a nut is tightened from the opposite side to rotate the head of the bolt 13, the locating jig 11 then contacts the detector body 12 and thereafter the rotation of the bolt 13 is stopped by a rotation preventing projection part 11a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connection of an electromagnetic flowmeter detector having a pipe connecting flange, and more particularly to a pipe connecting device used when attaching a pipe connecting bolt.

[0002]

2. Description of the Related Art When mounting an electromagnetic flowmeter detector having a conventional pipe connection flange, no particular positioning is performed by simply inserting the bolt into the bolt hole provided in the flange, or mounting the bolt in the bolt hole. A simple method was to tie a string and pull the string strongly to gather the bolts to determine the position.

[0003]

In mounting the electromagnetic flowmeter detector having the pipe connecting flange as described above, the shaft of the portion called the measuring pipe of the electromagnetic flowmeter detector in which the fluid to be measured flows and the shaft on the pipe side are attached. There is a problem that it is out of alignment. If the diameter of the measuring tube is large, the accuracy is not greatly affected, but as the diameter is smaller, a slight axis deviation greatly affects the accuracy, so it is easy to maintain the accuracy of the electromagnetic flow meter to be highly accurate. There was a need for a jig that can be handled and positioned and that can play a role in preventing nut rotation in order to improve piping work efficiency. An object of the present invention is to provide a pipe connecting device that prevents rotation.

[0004]

A pipe connecting device of the present invention is provided with a flange which is attached to a pipe and which connects the pipes facing each other, a through hole formed in the periphery of the flange, and a via hole provided through the through hole. It is characterized in that it is provided with a stopper for fastening the flanges to each other, and an inserter inserted between the stopper and the pipe so as to match the center positions of the opposed pipes. Further, in the pipe connecting device according to the second aspect of the present invention, a flange attached to the pipe to connect the facing pipes, a through hole formed around the flange, and a facing flange provided via the through hole are provided. A stopper for tightening, and a substantially U-shaped inserter inserted between the stopper and the pipe to match the center positions of the pipes facing each other,
And a protrusion provided on the U-shaped outer periphery of the insertion tool. Further, the pipe connecting device according to claim 3 includes a flange attached to the pipe to connect the opposing pipes, and a through hole formed around the flange.
It is characterized in that it is provided with a stopper that is provided through the through hole and that fastens the opposing flanges to each other, and a rotation stop portion that is provided so as to project from the pipe to the vicinity of the through hole.

[0005]

In the pipe connecting device of the present invention, a flange is attached to the pipe to connect the opposing pipes, a through hole is formed around the flange, a stopper is provided through the through hole, and the opposing flanges are fastened to each other. It is characterized in that an insertion tool is inserted between the stopper and the pipe to match the center positions of the pipes facing each other. Further, in the pipe connecting device according to claim 2, a flange is attached to the pipe to connect the opposing pipes, and a through hole is formed around the flange,
A stopper is provided through the through hole, the flanges facing each other are fastened to each other, and a substantially U-shaped inserter is inserted between the stopper and the pipe to match the center positions of the pipes facing each other. It is characterized in that a protrusion is provided on the outer periphery of the character shape. Further, in the pipe connecting device according to claim 3, a flange is attached to the pipe to connect the opposing pipes, a through hole is opened around the flange, a stopper is provided through the through hole, and the opposing flange is formed. It is characterized in that the rotation stoppers are provided so as to be tightened to each other and protrude from the pipe to near the through hole.

[0006]

EXAMPLE An example of the pipe connecting device of the present invention will be described below. In FIG. 1, a flange 14 is attached to a detector body 12 such as a pipe or an electromagnetic flow meter to connect the opposing pipes. The bolt hole 15 is a through hole formed around the flange 14. The connection bolt 13 has a bolt hole 15
Although not shown in the drawing, it is a stopper for tightening mutually opposed flanges. Positioning jig 11
Is an inserter that is inserted between the connecting bolt 13 and the detector main body 12 to match the center positions of the opposing pipes.

That is, FIG. 1 shows an embodiment of an electromagnetic flowmeter detector positioning jig structure. The positioning jig 11 is formed in a U-shape from resin, aluminum, iron, copper or the like, and the connecting bolt 13 is formed. It contacts the outside of the detector main body 12 of the electromagnetic flow meter so as to come into close contact with the outside of a bolt hole 15 provided at a predetermined position of the pipe connecting flange 14. When mounting, as shown in FIG. 2 and FIG. 3, the head of the connecting bolt 13 is covered with the positioning jig 11 from above, and the nut is tightened from the opposite side to rotate the head of the bolt so that the detector body 12 is positioned with the positioning jig. The rotation preventing convex portion 11a has a structure to stop the rotation when the 11 contacts and determines the position and further rotates.

According to the present embodiment, in the electromagnetic flow meter detector positioning jig having the above-mentioned structure, the distance from the outside of the detector to the bolt is kept constant, and the head of the connecting bolt is covered with the opposite when mounting. When the nut is turned from the side, the bolt also rotates and the positioning jig is molded into a U shape so that it can be automatically positioned, and a rotation prevention convex part is provided to prevent the bolt from rotating at a certain position. It has features.

That is, in the electromagnetic flowmeter detector positioning jig having the above-mentioned structure, the detector body 12 of the electromagnetic flowmeter is positioned at a fixed distance from the connection bolt 13, and at the same time the connection bolt 13 is placed outside the bolt hole 15. By closely contacting them, the axis of the detector body 12 and the axis of the pipe are automatically aligned with each other to prevent the rotation of the bolt. Further, the electromagnetic flow meter detector positioning jig is formed of resin, aluminum, iron, copper or the like based on the above-mentioned structure so that low cost can be achieved.

A modification of the structure of the electromagnetic flow meter detector positioning jig made by the structure of the present invention will be described.

4 and 5, the positioning jig 11 has a handle 20 attached to the jig 11, and the handle 20
Is to serve as a catch to prevent rotation.

Next, the one shown in FIG. 6 is a wedge-shaped jig 21 in which the shape of the positioning jig is transformed from the U-shape to the wedge-shape.
By setting the thickness to a predetermined value, a positioning effect similar to that of the U-shape can be obtained, and by inserting the wedge-shaped jig 21 from the direction in which the bolt rotates, the catching protrusion 21a can be removed. The bolt can be prevented from rotating by being caught on, and the manufacturing cost can be further reduced by simplifying the shape.

In FIGS. 7 and 8, the root of the pipe connecting flange 14 is partially shaved off and the head of the connecting bolt is shaved off so as to obtain the same effect as that of the positioning jigs 11 and 21 described above. It is designed to be positioned and to stop rotation of bolts by applying it to 22. Since it is not necessary to manufacture parts by only cutting off a part of the flange root, further cost reduction can be achieved.

FIG. 9 and FIG. 10 show a simple U-shaped jig 23 in which a screw 23a is attached instead of removing the rotation preventing catch 11a of the U-shaped jig 11. The rotation prevention effect can be obtained by the screw 23a functioning as a stopper.

As described above, according to the electromagnetic flowmeter detector positioning jig according to the present embodiment, the distance from the outside of the electromagnetic flowmeter detector to the bolt is constant depending on each flange standard and the measuring pipe diameter dimension. By forming resin or metal to a predetermined size as described above, by using this it is possible to keep the distance from each connection bolt to the electromagnetic flowmeter detector constant and the position of the detector is eccentric to the connection bolt. It is easy for anyone to maintain the high accuracy of the detector by automatically aligning the piping axis with the detector axis while holding it down.At the same time, by providing a convex part to prevent rotation of the bolt or nut, It plays the role of a stopper and can also improve the work efficiency of tightening the connecting bolts. By using resin, aluminum, iron, copper, etc. as the material, accuracy can be maintained at low cost and work efficiency can be improved. It is equal excellent effect that can offer improved.

[0016]

According to the present invention, it is possible to improve the reliability of pipe connection.

[Brief description of drawings]

FIG. 1 is a perspective view of a pipe connecting device showing an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is an explanatory diagram showing an operation of FIG.

FIG. 4 is a front view showing another embodiment.

5A and 5B are explanatory views showing the operation of FIG.

FIG. 6 is a perspective view showing another embodiment.

FIG. 7 is a perspective view showing still another embodiment.

FIG. 8 is a side view of FIG. 7;

FIG. 9 is a front view showing another embodiment.

FIG. 10 is an explanatory diagram showing the operation of FIG.

[Explanation of symbols]

 11 Positioning jig 11a Anti-rotation projection 13 Connection bolt 14 Connection flange 15 Bolt hole

Claims (3)

[Claims] 1. A flange attached to a pipe to connect opposing pipes, through holes formed in the periphery of these flanges, and a stopper for fastening the opposing flanges provided through the through hole to each other. A pipe connecting device comprising: a stopper and an inserter inserted between the stopper and the pipe to match the center positions of the pipes facing each other. 2. A flange which is attached to a pipe to connect the pipes facing each other, through holes formed around these flanges, and a stopper which is provided through the through hole and clamps the facing flanges to each other. , A substantially U-shaped insertion tool that is inserted between the stopper and the pipe to match the center positions of the pipes facing each other, and U of the insertion tool
A pipe connecting device comprising: a protrusion provided on a character-shaped outer periphery. 3. A flange attached to a pipe to connect the pipes facing each other, a through hole formed in the periphery of these flanges, and a stopper for fastening the facing flanges provided through the through hole to each other. And a rotation stopper provided so as to project from the pipe to near the through hole.