JPH07243565A - Flange type remotely fixed pipe fitting - Google Patents

Abstract

PURPOSE:To accomplish a structure capable of well working with eventual damage of a coupling bolt of a pipe fitting. CONSTITUTION:A bolt fastening member 16-1 is located automatically by a locating the back surface of the second flange part 12, and a support pin hole in a supporting member 16-2 is fitted on the first support pin 14 on the side face of the first flange part 11, and the plate surface of the bolt fastening member is contacted to and held by the back surface of the second flange part. This facilitates driving of a coupling bolt 13 into the fastening member. The supporting member is provided with a cutting margin between the joining part with the fastening member and the support pin hole, and this part is cut off when the bolt has ruptured. Thereby the bolt can be drawn off from the flange part while it is in engagement with the fastening member, which allows taking easy countermeasure for occurrence of bolt rupture. In case the bolt galls, it can be cleared by cutting off the bolt cutting margin between the head of the bolt and the back surface of the first flange part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flange type joint for connecting pipes in nuclear facilities and the like, and more particularly to a pipe joint having a structure that enables connection work by remote control.

[0002]

2. Description of the Related Art In an area such as an area inside a cell of a nuclear facility where an operator cannot enter and directly work due to the influence of radiation, various operations are performed from outside the cell by remote control using a manipulator or the like. There is a need. Therefore, connection and disconnection of various pipes arranged in the cell are also performed by remote control using a manipulator or the like, and a special pipe joint structure suitable for this is required.

FIG. 5 shows the structure of a conventional remote piping joint. (B) of this figure shows a side cross section of the joint,
(A) and (C) represent the X arrow view and the Y arrow view of this joint structure, respectively. As shown in this figure,
First flange portion 10 formed at the end of the pipe 101 of
3 and the second flange portion 104 formed at the end portion of the second pipe 102 have their respective flange surfaces abutted against each other, and the connecting bolt 105-is provided in a bolt hole provided at a corresponding position of each flange portion. 1 to 105-3 are communicated. On the back surface of the second flange portion, U-shaped box-shaped nut receivers 107-1 to 107 are provided at positions corresponding to the respective bolt holes.
-3 is fixed, and the nuts 106-1 to 106-3 connected to each other by the connecting rod 108 are held so that the screw hole centers of the nuts coincide with the bolt hole centers.

FIG. 6 shows the nuts 106-1 to 106-3 connected to each other by a connecting rod 108.
Shows a front view and (B) shows a side view. As shown in this figure, the three nuts 107-1 to 107-3 each have a notch for stopping rotation, and are connected to the connecting rod 108 by welding or the like. The connecting rod 108 is provided with a grip portion 109 to be gripped by a manipulator.

The connecting work of the pipe joint having such a structure is performed as follows. That is, first, in a state where the flange surfaces of the first flange portion 103 and the second flange portion 104 are butted against each other, the grip portion 109 of the connecting rod 108 is gripped by the manipulator, and the nut is moved from the Z direction in FIG. 5B. 1
06-1 to 106-3 are arranged in the nut receivers 107-1 to 107-3 of the second flange portion 104. Next, the bolts 105-1 to 105-3 are inserted into the respective bolt holes, the respective bolt heads are rotated by a dedicated bolt driver and screwed into the nuts 106-1 to 106-3, and the fastening is completed.

[0006]

In the pipe joint having such a structure, for example, when the threaded portions of the bolt and the nut are galled when the bolt is fastened or removed,
First, the nut runner is operated by remote control to destroy the screw, remove the bolt, and remove the nut.

However, if the bolt is broken at an unexpected place (for example, the central portion of the bolt) when the bolt is fastened or removed, the nut receiver interferes with the removal of the nut, and the pipe cannot be removed. It will be difficult to attach / remove the joint.

The present invention has been made in order to solve the above problems, and it is possible to easily attach and detach the pipe joint by remote control, regardless of the galling of the bolt and the nut. The purpose is to obtain a flange type pipe joint that can be made.

[0009]

According to a first aspect of the present invention, there is provided a flange type remote pipe joint, wherein a first flange portion provided at one end of the first pipe and one end of the second pipe are provided. A joint structure for connecting the second flange portion to each other by abutting the flange surfaces to each other, wherein (i) the bolt holes provided at respective opposing positions of the first and second flange portions are provided with the first flange portion. A connecting bolt communicated from the flange side, and (ii) a U-shaped notch provided to avoid interference with the second pipe, and a screw hole provided at a position facing each of the bolt holes. A plate-shaped member having a plate surface of the second member
A bolt fastening member that is detachably arranged so as to come into contact with the flange back surface of the flange portion of (3), and (iii) is fixedly installed on the flange back surface of the second flange portion, and the bolt fastening member contacts the flange back surface. A positioning member for positioning each screw hole of the bolt fastening member so as to match each bolt hole of the flange, and (iv) a support pin provided perpendicularly to the side surface of the first flange portion, (v) a plate-shaped member that is vertically and integrally joined to the plate surface of the bolt fastening member at the end opposite to the cutout portion of the bolt fastening member,
When the plate surface of the bolt fastening member is placed in contact with the screw fastening position on the rear surface of the flange of the second flange portion, it has a support pin hole that fits into the support pin and holds the contact state, and And a support member having a cutting margin between the support pin hole and the joint portion.

A flange type remote piping joint according to a second aspect of the present invention is the flange type remote piping joint according to the first aspect, further comprising a spacer member fixed to each bolt hole inlet on the rear face of the flange of the first flange portion to attach each bolt. It is characterized in that a bolt cutting margin is secured between the head of each bolt and the flange rear surface of the first flange portion in the tightened state.

A flange type remote piping joint according to a third aspect of the present invention is the same as in the first aspect, further comprising (i) the second
A second support pin provided perpendicularly to the side surface of the flange portion of (1), (ii) a gasket for ensuring airtightness between the first flange portion and the second flange portion, and (iii) this gasket A vertically fixed plate-like member having a support pin hole that fits into the second support pin, and the gasket is supported by this fitting to support the gasket with the first flange portion and the second flange portion. And a gasket support plate arranged at a predetermined position between the flange portion and the flange portion.

[0012]

According to the first aspect of the invention, the bolt fastening member is automatically positioned by the positioning member provided on the back surface of the flange of the second flange portion, and the bolt fastening member is provided on the side surface of the first flange portion. When the support pin hole of the support member is fitted into the first support pin, the plate surface of the bolt fastening member is held in contact with the rear surface of the flange of the second flange portion, facilitating the screwing of the connecting bolt. In addition, a predetermined cutting allowance is secured in the support member between the joint with the bolt fastening member and the support pin hole, so that the support member can be easily cut when a problem occurs with the connecting bolt.

According to the second aspect of the present invention, when the connecting bolts are fastened, a bolt cutting margin is secured between the heads of the connecting bolts and the rear surface of the flange of the first flange portion when a problem occurs in the connecting bolts. This makes it easy to cut the connecting bolt of.

According to the third aspect of the present invention, the gasket support member fixed to the gasket is provided with the support pin hole, and the second support pin is fitted into the support pin hole to complete the positioning of the gasket, and It also prevents the gasket from falling off.

[0015]

The present invention will be described in detail below with reference to the drawings.

1A and 1B show a flange type remote piping joint according to an embodiment of the present invention. FIG. 1A shows a side cross section of the joint, and FIG. 1B shows an X arrow view of this joint structure. .

As shown in this figure, the first flange portion 11 formed at the end portion of the first pipe 101 and the second flange portion 12 formed at the end portion of the second pipe 102 are ,
The flange surfaces are butted against each other with a gasket 18 for maintaining airtightness sandwiched therebetween, and the connecting bolts 13 are communicated with three bolt holes provided at corresponding positions of the flange portions. A spacer member 20 having a predetermined height is fixed to each inlet of the connecting bolt insertion hole of the first flange portion 11 to form a cutting allowance for cutting the connecting bolt 13 as described later.

A first support pin 14 is provided on the side surface of the first flange portion 11, and a second support pin 15 is provided on the side surface of the second flange portion 12, both of which are perpendicular to the side surface.
A gasket support member 19 is fixed to the gasket 18 perpendicularly to the gasket 18. This gasket support member 19 is provided with a support pin hole, and by fitting this into the second support pin 15, the gasket 18
Is positioned at a predetermined position between both flanges.

A convex positioning member 17 is fixed to the rear surface of the second flange portion 12, and a plate-shaped bolt fastening member 16-1 is removably abutted.

2A and 2B show the bolt fastening member 16-1. FIG. 2A is a front view, FIG. 2B is a top view, and FIG. 2C is a side view. As shown in these figures, the bolt fastening member 16-1 has three screw holes 22-1 to 22-3 into which the tip screw portions of the connecting bolts 13 (FIG. 1) are screwed, and the first flange. It is provided at a position corresponding to the bolt through hole of the portion 11 and the second flange portion 12. Bolt fastening member 16-
1 includes a U-shaped notch 2 for avoiding interference with the second pipe 102 (FIG. 1) and for fitting with the positioning member 17.
3 are provided and therefore the bolt fastening member 16-
1 is U-shaped as a whole. A support member 16-2 is integrally and vertically joined to the opposite end of the cutout portion 23 with the bolt fastening member 16-1.

The support member 16-2 includes the first support pin 1
4 (FIG. 1) is provided with a support pin hole 21.

Next, the procedure for detaching and attaching the flange type remote piping joint having the above-described structure by remote control is shown in FIG.
Explained by.

First, the manipulator (not shown) brings the integrated gasket support member 19 and gasket 18 closer to the second flange portion 12 from the upper side of the drawing,
A second support pin hole (not shown) provided on the gasket support member 19 is provided on the side surface of the second flange portion 12.
The gasket 18 is disposed so as to abut on the flange surface of the second flange portion 12 so as to be fitted to the support pin 15 of.

Next, the flange surface of the first flange portion 11 is disposed in contact with the flange surface of the second flange portion 12 via the gasket 18 so that the bolt through holes of both flanges are aligned with each other. This completes the positioning of the gasket and prevents the gasket from falling off.

Next, the integrated bolt fastening member 16-
1 and the support member 16-2 are brought closer to the second flange portion 12 from above in the drawing, and the support pin hole 21 of the support member 16-2 is provided.
The bolt fastening member 16 is fitted so that (FIG. 2) fits into the first support pin 14 provided on the side surface of the first flange portion 11.
The plate surface of -1 is arranged in contact with the rear surface of the flange of the second flange portion 12. At this time, the bolt fastening member 16-1 is U
The presence of the V-shaped notch 23 does not interfere with the second pipe 102. By fitting the notch 23 of the bolt fastening member 16-1 into the convex portion of the positioning member 17 fixed to the second flange portion 12, the screw holes 22-1 to 22 of the bolt fastening member 16-1 are fitted. -3 (FIG. 2) can be matched with the positions of the bolt through holes of both flange portions.

Next, the connecting bolt 13 is passed through the bolt through holes of the first flange portion 11 and the second flange portion 12,
Each bolt head is rotated by a dedicated bolt driver (not shown) so that each screw hole 2 of the bolt fastening member 16-1 is rotated.
Screw into 2-1 to 22-3.

By the above procedure, the first flange portion 11
And the second flange portion 12 is fastened.

In the pipe joint having such a structure, for example, when the bolt is fastened or removed, the connecting bolt 13
When the threaded portion of the bolt fastening member 16-1 is galled, it can be dealt with by the following method.

That is, as shown in FIG. 3, first of all, a special cutter (not shown) is used to cut the under-neck portion of the connecting bolt 13 together with the spacer member 20 at the A portion, and further the positioning member 17 is cut at the B portion. To do. Then, as shown in FIG. 4, the bolt fastening member 16-1 is gripped by the manipulator and moved horizontally in the direction of arrow X. As a result, the cut connecting bolts 13 become the bolt fastening members 16
It is pulled out from the bolt through holes of the first and second flange portions while being screwed into -1.

It is desirable to provide a predetermined space between the positioning member 17 and the side surface of the flange in order to avoid interference between the cutter and the side surface of the flange when cutting the cutting portion B of the positioning member 17. This space is determined by the position where the tip of the U-shaped arm of the bolt fastening member 16-1 abuts on both shoulders of the positioning member 17, so that the bolt fastening member 16-
The length of the U-shaped arm 1 or the height of both shoulders of the positioning member 17 may be determined.

Thus, in this embodiment, the connecting bolt 1
The spacer member 20 is fixed to the insertion port of No. 3 to secure a sufficient cutting margin (A portion), and the first support pin 14 fitted to the support member 16-2 is provided on the side surface of the first flange portion 11. Is provided on the support member 16-2 to secure a sufficient cutting allowance (B portion) to facilitate the cutting of the A portion and the B portion. Further, in this embodiment, a U-shaped box-shaped nut receiver that is conventionally provided on the rear surface of the flange of the second flange portion 12 is arranged.

For this reason, not only can the usual detaching work of the flange type pipe joint be easily performed by remote control, but also when galling of the connecting bolt occurs, A
By disconnecting the portion and the portion B by remote control, the connection bolt after the disconnection can be pulled out while being screwed into the bolt fastening member 16-1.

Further, when the connecting bolt is broken at its central portion during the installation or removal of the pipe joint, the supporting member 1
By remotely cutting only the portion B of 6-2, the broken connecting bolt can be pulled out while being screwed into the bolt fastening member 16-1.

As described above, in the present embodiment, the undesirable phenomenon relating to the connecting bolt can be quickly and easily dealt with by remote control by removing the pipe joint.

[0035]

As described above, according to the first aspect of the present invention, the bolt fastening member is automatically positioned by the positioning member on the rear surface of the flange of the second flange portion, and the first flange portion is Since the support pin hole of the support member is fitted into the first support pin on the side surface to hold the plate surface of the bolt fastening member in contact with the flange rear surface of the second flange portion, the connecting bolt is connected to the bolt fastening member. It can be easily screwed in and the fastening work of both flange parts by remote control becomes easy.

Moreover, since the support member has a predetermined cutting allowance between the joint with the bolt fastening member and the support pin hole, the support member of the connecting bolt can be easily cut. For this reason, even if the connecting bolt breaks at its center during the work of tightening or removing both flanges, the flange can be screwed into the bolt fastening member by simply cutting the cutting margin of the support member. Can be pulled out of the department. Therefore, even if the connecting bolt is broken, the pipe joint can be removed quickly and easily by remote control.

According to the second aspect of the present invention, since a bolt cutting margin is secured between the head of each connecting bolt and the rear surface of the flange of the first flange portion in the tightened state of each connecting bolt, the connecting bolt of this portion is secured. Easy to cut. For this reason,
If galling occurs on the connecting bolt, cut the specified part of the above support member and cut the bolt cutting margin so that the connecting bolt can be pulled out from the flange while screwed into the bolt fastening member. You can Therefore, the galling of the connecting bolt can be dealt with quickly and easily by removing the pipe joint by remote control.

According to the third aspect of the present invention, the gasket support member fixed to the gasket is provided with the support pin hole, and the second support pin is fitted into the support pin hole to perform the automatic positioning of the gasket. Since the gasket is prevented from falling off, the gasket can be easily attached when the both flanges are butted, and the structure is further suitable for remote operation.

[Brief description of drawings]

FIG. 1 is a view showing a structure of a flange type pipe joint for remote control in one embodiment of the present invention, (A) is a side sectional view,
(B) is a front view.

2A and 2B are views showing the structure of a bolt fastening member used in the pipe joint of FIG. 1, in which FIG. 2A is a front view, FIG. 2B is a top view, and FIG.

FIG. 3 is a view showing a cut portion of a connecting bolt and a supporting member in the flange pipe joint for remote control of FIG.

FIG. 4 is a view showing a state after cutting the bolt and the supporting member and removing the bolt fastening member in the remote control flange type pipe joint of FIG.

5A and 5B are diagrams showing a structure of a conventional flange pipe joint for remote control, in which FIG. 5B is a side sectional view, and FIGS. 5A and 5C are front and rear views.

6A and 6B are diagrams showing a structure of a nut member used in a conventional flange pipe joint for remote control, where FIG. 6A is a front view and FIG. 6B is a side view.

[Explanation of symbols]

 11 1st flange part 12 2nd flange part 13 Connection bolt 14 1st support pin 15 2nd support pin 16-1 Bolt fastening member 16-2 Support member 17 Positioning member 18 Gasket 19 Gasket support member 20 Spacer member 21 Support Pin Holes 22-1 to 22-3 Screw Hole 23 Notch

Claims (3)

[Claims] 1. A joint structure for connecting a first flange portion provided at one end of a first pipe and a second flange portion provided at one end of a second pipe by abutting their flange surfaces to each other. In order to avoid interference between the connecting bolts that are communicated from the first flange portion side with the bolt holes provided at the facing positions of the first and second flange portions, and the second pipe. Is a plate-shaped member having a U-shaped notch provided in and a screw hole provided at a position facing each of the bolt holes, the plate surface of which is in contact with the rear surface of the flange of the second flange portion. A bolt fastening member that is detachably disposed so as to be in contact with each other, and each screw of the bolt fastening member that is fixed to the flange rear surface of the second flange portion and that is fixed when the bolt fastening member contacts the flange back surface. Align holes with flange bolt holes A positioning member for positioning the first flange portion, a support pin provided vertically on a side surface of the first flange portion, an end portion of the bolt fastening member opposite to the cutout portion, and a plate surface of the bolt fastening member. A plate-shaped member integrally joined, wherein the plate surface of the bolt fastening member is engaged with the support pin when the plate surface is brought into contact with the screw tightening position on the rear surface of the flange of the second flange portion. A remote control flange type pipe joint, comprising: a support pin hole for holding a state, and a support member having a cutting allowance between the support pin hole and the joint portion. 2. The head according to claim 1, further comprising a spacer member fixed to each bolt hole inlet on the rear surface of the flange of the first flange portion, and the head of each bolt and the first flange in a state in which each bolt is fastened. A flange type pipe joint for remote operation, characterized in that a bolt cutting margin is secured between it and the flange rear surface. 3. The method according to claim 1, further comprising ensuring airtightness between the first support flange and the second support pin that is provided perpendicular to the side surface of the second flange portion. And a plate-shaped member vertically fixed to the gasket,
A support pin hole that fits into the second support pin is provided, and the gasket is supported by this fitting, and the gasket is arranged at a predetermined position between the first flange portion and the second flange portion. A flange type pipe joint for remote operation, comprising: