JPH0979427A - Pipe joining equipment - Google Patents

Abstract

(57) [Abstract] [Problem] Joining of pipe joints is performed manually by an operator, which is inefficient. When laying a pipeline in an open-cut groove, the operator must not enter the groove. It may be dangerous. SOLUTION: Holding means 30 and 3 which are fitted in a receptacle 2
The head 16 of the bolt 15 passed through the flange 7 by 3 is held, and the bolt 15 is centered. The push wheel 10 is rotated so that the bolt hole 11 of the push wheel 9 and the bolt 15 passed through the flange 7 are circumferentially aligned with each other. By moving the push wheel 10 toward the flange 7 of the receiving opening 2 by the cylinder device 22, the sealing material 9 fitted in the insertion opening 4 is pushed by the pressing wheel 10 between the receiving opening of the flange 7. While being pushed in, holding means 30,
The threaded portion of the bolt 15 held by 33 is passed through the bolt hole 11 of the push ring 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joining device, and more particularly, in a pipe joint in a state where an insertion opening of one pipe in the horizontal direction is inserted into an insertion opening of another pipe BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joining device for compressing an annular seal member arranged by a push ring bolted to a flange at an opening end of a receiving port.

[0002]

2. Description of the Related Art As a kind of pipe joint, as described above, a sealing material arranged between a receiving port of one pipe and an inserting port of the other pipe to be inserted into this receiving port is used as a receiving port. A so-called mechanical type pipe joint is known in which compression is performed by a push ring bolted to a flange at the open end of the.

When joining such a pipe joint, an insertion opening in which a sealing material and a push ring are fitted beforehand is inserted into the inside of the receiving opening, and the sealing material is attached to the inside surface of the receiving opening at the opening of the receiving opening. And the outer surface of the insertion slot, and the push ring is bolted to the flange to compress the seal material.

[0004]

However, these series of steps are carried out manually by the operator, which is inefficient, and when the pipeline is laid in the excavation groove from the ground surface. However, there is a problem that an operator must enter the groove, which may be dangerous.

Therefore, an object of the invention of claim 1 is to provide a pipe joining device capable of efficiently and accurately attaching a push ring to a socket flange without danger. It was done.

[0006]

In order to achieve the above-mentioned object, the pipe joining apparatus according to the first aspect of the present invention is detachably fitted to the receiving port of one of the pipes. By this, holding means for holding the head of the bolt passed through the flange is provided, and while holding the push ring fitted in the insertion opening on the frame placed from above on one and the other pipe, A means for rotating the push wheel so that the bolt holes of the push wheel and the bolts passed through the flange coincide with each other in the circumferential direction, and the push wheel is moved by moving the push wheel in a direction approaching the flange of the receiving port. The sealing material that has been fitted to the insertion opening between the flange of the receiving opening is pushed between the receiving opening of the flange opening by this push ring, and the threaded portion of the bolt held by the holding means. To Is obtained by characterized in that a moving means for pass of the bolt hole of the pressing ring.

Therefore, according to the first aspect of the present invention, when joining the pipes in the horizontal direction, the insertion port in which the sealing material and the push ring are fitted beforehand is placed above the portion inserted in the receiving port. Place the frame from. And
Before and after mounting the frame, the holding means is fitted to the receiving opening, and the head of the bolt that has been passed through the flange of the receiving opening is held by this holding means, and the bolt is centered vertically and horizontally. Keep the bolt axis parallel to the tube axis without shifting. In this state, by holding the push wheel by the push wheel rotating means and rotating the push wheel rotating means, the bolt hole of the push wheel and the bolt which is passed through the flange and held by the holding means without being misaligned with each other are arranged in the circumferential direction. To match. Next, when the push wheel is moved in the direction of approaching the flange of the receiving port by the moving means, the sealing material is pushed into a predetermined position between the receiving port insertion portion by this pressing wheel, and the screw part of the bolt is passed through the bolt hole of the pressing wheel. It This completes the pushing of the sealing material and the placement of the push ring, so that the joint of the joint is completed by tightening the nut of the bolt. After that, the frame is pulled up and removed, and the holding means is removed from the receiving port and removed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 7 shows the structure of a pipe joint to be joined using the device of the present invention. Here, a receiving port 2 is formed at an end of one of the tubes 1 connected to each other, and an insertion port 4 inserted into the receiving port 2 is formed at an end of the other tube 3. A tapered sealing material pressure contact surface 5 is formed on the inner periphery of the opening end of the receiving port 2, and an inner peripheral surface 6 is formed on the inner side of the sealing material pressure contact surface 5. A flange 7 is formed on the outer periphery of the opening end of the receiving port 2, and a bolt hole 8 is formed in the flange 7.

The insertion port 4 is inserted to the inside of the inner peripheral surface 6, and an annular sealing material 9 is arranged between the seal member pressure contact surface 5 of the receiving port 2 and the outer peripheral surface of the insertion port 4. . A push ring 10 is fitted on the outer circumference of the insertion slot 4 at a position away from the receiving slot 2. A plurality of T-head bolts 15 in the pipe axial direction passing through the flange 7 of the socket 2 and the push ring 10 are provided in the circumferential direction of the pipe, and a nut 17 is screwed onto each T-head bolt 15 so that the push ring 10 is attached to the flange 7. Tightened. Figure 8 shows T-head bolt 15 and nut
It is a figure which shows only 17 separately, 16 is a bolt head of the T head bolt 15. As shown in FIG. 9, the push ring 10 has a T-head bolt 15
Are formed in a polygonal shape corresponding to the number of 11 is the bolt hole.

In this way, the sealing material 9 is pressed by the push wheel 10, and the sealing material 9 is pressed against the sealing material 5 and the insertion port 4.
A predetermined sealing function is exerted between the receiving port and the receiving port by being compressed with the outer peripheral surface of the receiving port.

FIG. 2 shows the overall construction of a pipe joining apparatus 20 according to the present invention. As shown, the first plate 21 in the cross-sectional direction of the tubes 1, 3 is joined to the second plate 23 by the cylinder device 22, and the second plate 23 is connected by the tie rod 24 in the tube axial direction to the third plate. Connected to 25, second
A frame 28 is formed by connecting an end portion of a guide shaft 26 in the tube axis direction, which extends from the plate 23 and slidably penetrates the third plate 25, to the clamp device 27. The first to third plates 21, 23, 25 are formed in U-shapes in opposite directions, respectively, and the clamp device 27 is also configured such that the lower side is opened, so that the frame
The pipe 28 can be arranged over the pipes 1 and 3 in the horizontal direction while being placed from above on the pipes 1 and 3.

The pipes 1 and 3 are thus frame 28
Before being placed, the insertion port 4 is inserted inside the receiving port 2, the sealing material 9 and the polygonal push ring 10 are externally fitted to the insertion port 4, and the T-head bolt 15 Is in a state of being passed through the bolt hole 8 of the flange 7 of the receiving port 2.

1 and 3 show the first plate 21 and its periphery in detail. Between the first plate 21 and the flange 7, there is provided a bolt setter plate 30 which is detachably fitted to the receiving port 2 of the one tube 1. This bolt setter plate 30 is a pair of half ring members 30.
The lower ends of A are connected by a hinge 31 having a pin extending in the direction of the tube axis.

By opening both half ring bodies 30A through the hinges 31 so that the upper ends thereof are separated from each other, they can be fitted or removed from the receptacle 2. Also, the socket 2
After fitting the outer ring with respect to each other, by closing both half split ring bodies 30A so that the upper ends contact each other via the hinge 31,
The bolt setter plate 30 can be attached to the receiving port 2 in a ring shape. Such an outer fit of the bolt setter plate 30 is received by closely contacting the outer surface of the receiving port 2 or by a roller (not shown) provided on the upper end side of both the half ring members 30A. By making contact with the outer surface of the top of the mouth 2, it is carried out concentrically with respect to the receptacle 2. In addition, in order to maintain the ring shape when the outer ring is fitted, the attachment / detachment fixture 32 is provided between the upper ends of the half ring body 30A.
Is provided.

The surface of the bolt setter plate 30 on the side of the other pipe 3 passes through the flange 7 when the bolt setter plate 30 moves so as to approach the flange 7 while being supported by the receptacle 2. A bolt fixing portion 33 that can hold the bolt head 16 by engaging with the bolt head 16 of the T head bolt 15
Are provided corresponding to each T-head bolt 15.

That is, the bolt fixing portion 33 is the bolt head 16
Block-shaped outer member 33A for preventing movement of the bolt head 16 around the pipe axis and a block-shaped outer member 33A for preventing movement of the bolt head 16 away from the pipe axis. And the side member 33B of the
The bolt head 16 is fitted between the inner surfaces of A and 33B with a slight clearance. It should be noted that the movement of the bolt head 16 in the direction along the tube axis means that the bolt setter plate 30
And the flange 7 prevent it.

As described above, the first plate 21 is formed in an inverted U shape, and can be placed on the receiving port 2 from above so that the receiving port 2 of the pipe 1 is inserted into the cutout portion 34. It is said that. Then, the roller 36 at the tip of the bracket 35 attached to the first plate 21 in the tube axis direction is attached to the tube 1
This first plate 21 is supported by the tube 1 by contacting the outer surface of the top of the tube.

The cylinder device 22 has three cylinders along the circumferential direction of the pipe 1.
It is installed in the place and the bolt fixing part 33 is the T-head bolt 15
These cylinder devices are engaged with the bolt head 16 of
The second plate 23 moves in the direction of approaching the flange 7 by the shortening operation of 22. 37 is a potentiometer for detecting the amount of movement.

FIGS. 1, 4 and 5 show a second plate
23 and its surroundings are shown in detail. This second plate 23
Is also formed in an inverted U shape, and the notch portion 38 is configured so that the insertion port 4 of the tube 3 is inserted therein. A bracket 39 in the pipe diameter direction is attached to the second plate 23, and a roller 40 provided at the lower end of the bracket 39 contacts the top of the pipe 3 so that the second plate 23 is attached to the pipe 3. Supported by.

On the second plate 23, a crescent-shaped push ring setter 42 is arranged along the outer periphery of the upper half of the tube 3. A crescent-shaped groove 43 is formed on the side surface of the push wheel setter 42 along the circumferential direction, and a plurality of rollers 44 rotatably attached to the second plate 23 are fitted into the groove 43 in the circumferential direction. By that, push ring setter
42 is arranged concentrically with the tubes 1 and 3, and
It is rotatable in the circumferential direction over a certain angle range. A stopper 45 is provided to prevent the push wheel setter 42 from being separated from the second plate 23. An arc-shaped rack 46 is formed in a certain range on the outer circumference of the push wheel setter 42. A motor 47 is attached to the second plate 23, and a pinion 48 driven by the motor 47 meshes with the rack 46 so that the push wheel setter 42 is rotationally driven in the circumferential direction. There is.

The push wheel setter 42 is provided with a step portion 50 having a shape matching the outer shape of the polygonal push wheel 10. The pushing wheel 10 having a polygonal shape is stationary at an arbitrary angle in the circumferential direction in a state where the pushing wheel 10 is fitted into the insertion opening 4 outside. Therefore, by rotating the push wheel setter 42 as described above, the angle of the step portion 50 of the push wheel setter 42 can be matched with the angle of the push wheel 10.

A push-wheel pusher 51 is provided to push the push wheel 10 into the step portion 50 when the angles of the both coincide with each other. That is, as shown in FIGS. 1 and 3, horizontal notches 52 are provided at positions on both sides of the first plate 21 that do not interfere with the flange 7, and the horizontal notches 52 are formed. The blocks 54 are engaged with the guides 53, and the blocks 54 are movable along the guides 53 in the pipe radial direction. A cylinder device 55 in the tube axis direction is attached to each block 54, and the cylinder device 55 is extendable in the direction toward the second plate 23. A contact plate 56 extending inward in the pipe radial direction is attached to the expandable end of the cylinder device 55.

The first plate 21 has a pair of swing levers 58.
Is attached, and the swing end of each swing lever 58 is connected to the block 54. A cylinder device 59 is provided between the rocking levers 58.
By swinging the swing lever 58 in response to the expansion and contraction movement of
The block 54 guided by the guide 53 is configured to move in the pipe radial direction. As the block 54 moves in this manner, the contact plate 56 correspondingly moves to a position where it can come into contact with the end surface of the push ring 10 by the extension of the cylinder device 59 as shown in FIG. It is movable between the outwardly retracted position and.

Then, as the cylinder device 55 extends at a position where the contact plate 56 can contact the end surface of the pressing wheel 10, the pressing wheel 10 in a state where the angle matches the angle of the step 50 as shown in FIG. It is configured to be pushed into the step portion 50 by being pushed by the 56.

The inner diameter of the push ring 10 fitted into the insertion opening 4 is slightly larger than the outer diameter of the insertion opening 4 so that the push ring 10 can be pushed into the stepped portion 50 with some room. It is configured to Therefore, the push ring 10 is in a state of being decentered with respect to the insertion port 4, and as a result, the bolt hole 11 of the push ring 10 is decentered with respect to the threaded portion of the T-head bolt 15.

After correcting this misalignment automatically, the push ring 10
In order to hold, as shown in FIGS. 1, 4 and 5,
Push wheel centering claws 61 are provided at positions facing the stepped portion 50 from the inside and at the position facing the top of the pipe 3 and at both left and right positions displaced by a predetermined angle in the circumferential direction. The push wheel centering claws 61 are fixed to the push wheel setter 42 via the arms 62, respectively.

Each push wheel centering claw 61 is wide, its inner surface is opposed to the outer surface of the insertion slot 4 with a gap, and its outer surface is inclined toward the tube axis center toward the first plate 21 side. Outside
Formed in 63. The inner peripheral surface of the push wheel 10 is also formed as an inclined inner surface 12 closer to the tube axis on the first plate 21 side. Therefore, as described above, when the push wheel 10 is pushed into the step portion 50, the slanted inner surface 12 of the push wheel 10 is guided up to the slanted outer surface 63 of the push wheel centering claw 61 group. As a result, the upper push wheel centering claw 61 can perform centering in the vertical direction, and the left and right push wheel centering claws 61 can perform centering in the left and right directions, thereby centering the push wheel 10 and performing centering. The push wheel 10 that is pushed out and pushed into the step portion 50 is configured to be held by the push wheel centering claw 61 group.

The push ring 10 centered and held in this way
By being pushed into the step portion 50 of the push wheel setter 42, can be integrally rotated with the push wheel setter 42. Although illustration is omitted, the push wheel setter 42 has a sensor for detecting that the bolt hole 11 of the push wheel 10 coincides with the position of the T-head bolt 15 held on the flange 7 of the receiving port 2 by this rotation. It is provided.

When the second plate 23 is pulled toward the first plate 21 by the cylinder device 22 after the positions of both are coincident with each other, the push ring 10 causes the push wheel 10 to follow the flange 7 of the socket 2.
Approached. At this time, the seal material 9 is pushed between the seal material pressure contact surface 5 and the outer peripheral surface of the insertion opening 4 by being pushed by the push wheel 10. In addition, the thread of the T-head bolt 15 is
It is passed through the bolt holes 11 of 10 and further projects from the push wheel 10.

As shown in FIGS. 2 and 4 to 6, at a position farther from the first plate 21 than the second plate 23,
Similar to the push wheel setter 42, a crescent-shaped holding plate 65 is provided. This holding plate 65 has a second
Is connected to the push ring setter 42 by a plurality of connecting rods 66 arranged at a position avoiding interference with the plate 23, and thus can rotate integrally with the push ring setter 42.

The holding plate 65 is provided with a nut socket 67 in the tube axis direction at a position corresponding to the bolt hole 11 of the push wheel 10 mounted on the step portion 50 of the push wheel setter 42. In the nut socket 67, 68 is a bearing attached to the holding plate 65, and the bearing 68 causes the shaft to
An intermediate portion of 69 is supported so as to be rotatable and slidable in the axial direction. A socket 70 is provided at the end of the shaft 69 on the push wheel setter 42 side.
The nut 17 is held by 70. A large diameter portion 71 and a torque transmission protrusion 72 are provided at the end of the shaft 69 on the third plate 25 side. A compression coil spring 73 is externally fitted to the outer periphery of the shaft 69 between the large diameter portion 71 and the bearing 68, and the compression coil spring 73 is provided in the shaft 70 in a direction in which the socket 70 moves away from the push wheel setter 42.
It is possible to press 69 to move it.

The nut socket 67 at a position corresponding to the lower portion of the pipe 3 is attached to the pivotable support arm 74 so as not to interfere with the pipe 3 when the second plate 23 is placed on the pipe 3 from above. It is installed.

As shown in FIGS. 2 and 6, since the third plate 25 is connected to the second plate 23 by the tie rod 24, the cylinder plate 22 moves the second plate 23 and the holding plate 65. When they are moved, they move integrally with them while being guided by the guide shaft 26. This third plate 25 has a bracket 75 in the tube axial direction.
The roller 76 at the end of this bracket 75 is provided.
Is in contact with the outer surface of the top of the tube 3, so that the third plate 15 is supported by the tube 3.

The third plate 25 includes the second plate 23.
A crescent-shaped nut runner support plate 78 having substantially the same structure as the push wheel setter 42 in FIG. That is, 79 is a groove portion, 80 is a roller, and 81 is a stopper, by which the nut runner support plate 78 is rotatable in the circumferential direction. Similarly, 82 is a rack, 83 is a motor, and 84 is a pinion, which are configured to rotate the nut runner support plate 78 over a certain range in the circumferential direction.

The nut runner support plate 78 includes a pair of brackets in the axial direction of the pipe which are spaced 180 degrees apart in the circumferential direction.
86 is attached. The bracket 86 includes a linear motor that moves in the tube axis direction toward the second plate 23.
87 is installed, and this linear motor 87
A nut runner 88 in the pipe axis direction is attached to the moving part of the. The nut runner 88 has a drive socket 89 at its tip, and the drive socket 89 is installed at a position corresponding to the pitch diameter of the bolt holes 11 of the push wheel 10. Therefore, the drive socket 89 can be moved on the pitch circle of the bolt hole 11 by the rotation of the nut runner support plate 78, and can be stopped at a position facing the torque transmission protrusion 72 of the nut socket 67 as shown in FIG. Is.

In this state, the linear motor 87 is driven to move the nut runner 88 toward the second plate 23, so that the drive socket 89 meshes with the torque transmission projection 72 of the nut socket 67, and the nut runner 88 moves. Rotational torque can be transmitted to the socket 70 based on the rotation operation. Then, when the nut runner 88 further moves, the shaft 69 of the nut socket 67 also moves integrally, and the nut 17 held in the socket 70 of the T-head bolt 15 protruding from the bolt hole 11 of the push ring 10. It is configured to be screwed onto the threaded portion.

By rotating the nut runner support plate 78, the nut runner 88 can be engaged with any nut socket 67. Since a pair of nut runners 88 are provided, it suffices that each nut runner 88 is located corresponding to the nut socket 67 for half the circumference. Therefore, the rack 82 is formed in a range corresponding to it.

The clamp device 27 is for clamping the entire joining device 20 to the pipe joint part, and when the bolt head 16 of the T-head bolt 15 is held by the bolt fixing portion 33 of the bolt setter plate 30. Is configured to operate.

The operation of the above-described embodiment will be described below. That is, when joining the pipes 1 and 3 in the horizontal direction, first insert the insertion port 4 into the receiving port 2 in advance, and then fit the sealing material 9 and the push ring 10 on the outer periphery of the insertion port 4 by fitting them. deep. At this time, since the push wheel 10 is formed such that its inner diameter is slightly larger than the outer diameter of the insertion slot 4 so as to allow a margin, it is in a state of being offset from the insertion opening 4.

Further, the bolt setter plate 30 is externally fitted to the receptacle 2. In this outer fit, after opening both half ring bodies 30A so that the upper ends thereof are separated from each other via the hinge 31,
The half ring body 30A is fitted into the receiving port 2 from below, and the upper and lower half ring bodies 30A are closed so that the upper ends come into contact with each other via the hinges 31, and then the attachment / detachment fixture 32 is attached between the upper ends of the half ring body 30A.
It can be done by fixing with.

In this state, or the bolt setter plate 30
Before fitting the pipes, the pipe joining apparatus 20 of the present invention is hung from above, and its frame 28 is placed from one pipe 1 to the other pipe 3. Then the first to third plates
21, 23, 25 are supported on the top of the tubes 1, 3 by rollers 32, 40, 76. Then, rotate the support arm 74,
Set the lower nut socket 67 at the specified position.

Next, the frame 28 is moved toward the pipe 3 along the pipe axial direction, and the first plate 21 is attached to the bolt setter plate 30.
When the bolt setter plate 30 is moved toward the flange 7 while being supported by the socket 2, the bolt head 16 of the T-head bolt 15 passed through the flange 7 is bolted to the bolt head 16. Fixing part 33 is engaged and this bolt fixing part
The bolt head 16 is held by 33.

At this time, the bolt fixing portion 33 is the bolt head 16
Is prevented by the outer member 33A from moving to the side away from the tube axis (outer side), and the bolt head 16 is prevented from moving around the tube axis by the side member 33B. Thus, the bolt shaft core is maintained parallel to the pipe shaft core without being displaced from the center of the bolt 15 vertically or horizontally. When the clamp device 27 is activated, the T-head bolt 15
The frame 28 is fixed to the pipes 1 and 3 while holding.
At this time, the sealing material 9 and the push wheel 10 are present between the flange 7 of the receiving port 2 and the push wheel setter 42 of the second plate 23.

Next, the cylinder device 59 is driven to move the push wheel pusher 51 inward in the radial direction along the guide 53, and the cylinder device 55 is extended to move the contact plate 56 to the push wheel 10.
Touch the end face of. At this time, the polygonal push wheel 10 has its inner circumferential portion fixed to the pipe 3 while being stationary at an arbitrary angle in the circumferential direction.
Supported by the top of the. When the cylinder device 55 is further extended in this state, the push wheel 10 contacts the end surface of the push wheel setter 42.

Then, when the push wheel setter 42 is rotated by the motor 47, when the angle of the step portion 50 matches the angle of the push wheel 10, the push wheel 10 is pushed by the contact plate 56 of the pusher 51 and pushed into the step portion 50. Go away. At that time, the slanted inner surface 12 of the push wheel 10 is guided on the slanted outer surface 63 of the push wheel centering claw 61 group, so that the push wheel 10 is lifted, centered, and pushed into the step portion 50. At the same time, the push wheel 10 pushed into the step portion 50 is held by the push wheel centering claw 61 group.

As a result, the upper push ring centering claw 61 can perform vertical centering, and the left and right push ring centering claws 61 can perform horizontal centering. The alignment radius of the group of 15 T-head bolts and the alignment radius of the group of bolt holes 11 of the push ring 10 can be made equal to automatically correct the misalignment. In this way, the push ring 10 centered and held is
It becomes possible to rotate integrally with the push wheel setter 42.

When the push wheel setter 42 holds the push wheel 10, the cylinder device 55 of the push wheel pusher 51 is shortened to move the contact plate 56 away from the push wheel 10, and the cylinder device is moved.
59 is driven to move the push wheel pusher 51 radially outward along the guide 53, and the contact plate 56 is retracted laterally.

Then, the push wheel setter 42 is further rotated,
A bolt hole of the push ring 10 by the sensor (not shown).
T-head bolt with 11 position held without misalignment
If it is detected that the position of 15 is matched, the rotation is stopped. After that, the cylinder device 22 is operated to draw the second plate 23 having the push wheel setter 42 attached thereto toward the first plate 21. At this time, the holding plate 65 holding the nut socket 67 is also pulled together by the action of the connecting rod 66, and the third plate 25 and the nut runner 88 connected to the second plate 23 by the tie rod 24 are also connected to the guide shaft. They are guided by 26 and are pulled together as well.

By this pulling operation, the push wheel 10 is brought close to the flange 7 of the receiving port 2 together with the push wheel setter 42.
At this time, the seal material 9 is pushed between the seal material pressure contact surface 5 and the outer peripheral surface of the insertion opening 4 by being pushed by the push wheel 10. Further, the threaded portion of the T-head bolt 15 has a bolt hole 11 of the push ring 10.
And further protrudes from the push ring 10. Then T
Since the head bolt 15 is centered, it can be accurately passed through the bolt hole 11, and further the push ring 10, that is, the bolt hole.
Since the 11 side is also centered, it can be done more accurately.

The nut 17 is held in advance in the socket 70 of each nut socket 67. Since the socket 70 is provided at a position corresponding to the bolt hole 11 of the push wheel 10 attached to the stepped portion 50, when the threaded portion of the T-head bolt 15 is passed through the bolt hole 11 as described above, the nut 17 is present coaxially with the threaded portion of the T-head bolt 15.

Therefore, the support plate 78 of the third plate 25 is used.
Is rotated by the motor 83 to move the drive socket 89 of the nut runner 88 to the torque transmission projection 72 of the optional nut socket 67.
The linearized motor 87 moves the nut runner 88 toward the second plate 23, that is, the push wheel 10. Then, first, the drive socket 89 of the nut runner 88 meshes with the torque transmission projection 72, and the rotational torque can be transmitted to the socket 70, that is, the nut 17, based on the rotational movement of the nut runner 88. When the nut runner 88 moves further, the compression coil spring
The shaft 69 is moved in the direction approaching the push ring 10 against the force of 73, and the nut 17 held in the socket 70 is screwed onto the threaded portion of the T-head bolt 15.

When the nut 17 is screwed to the T-head bolt 15 at one position in the circumferential direction with a specified torque, the linear motor 87 is driven in the opposite direction to push the nut runner 88 into the push ring.
Keep away from 10. Then, along with that, the nut socket
67 also returns to its original position by the action of the compression coil spring 73,
Further, the drive socket 89 of the nut runner 88 separates from the torque transmission protrusion 72.

Since the support plate 78 is provided with the pair of nut runners 88, the nuts 17 can be screwed and fastened to the T-head bolts 15 at two locations at a time. Then, rotate the support plate 78 to rotate the nut runner.
88 is made to correspond to another nut socket 67, and thereafter, the same operation is repeated, and the nuts 17 are screwed to all the T-head bolts 15 and tightened. By doing so, the sealing material 9 is compressed by the pressing wheel 10 with a predetermined force, and the required sealing function is given to the pipe joint.

Next, the support arm 74 is swung to open it, the clamped state by the clamp device 27 is released, and the joining device 20 is lifted and removed from the position shown in the drawing. Finally,
After detaching the attachment / detachment fixture 32, the two half ring bodies 30A are
The bolt setter plate 30 is removed from the receiving port 2 with the hinges 31 being opened so that the upper ends thereof are separated from each other, and is removed. At this time, since the upper ends are opened so as to be separated from each other, they can be easily removed.

[0055]

According to claim 1 of the present invention described above, the frame is provided with the holding means for holding the head of the bolt passed through the flange by being detachably fitted to the receiving port. Since a means for holding the push-fitted wheel fitted in the insertion slot and rotating the push-wheel and a moving means for moving the push-wheel in the direction of approaching the flange of the socket are provided, the flange of the socket can be inserted in advance. The head of the bolt can be held by this holding means, and the bolt axis can be maintained in parallel with the tube axis without shifting the bolt vertically or horizontally, and by the rotating means. The bolt hole of the push wheel and the bolt that is passed through the flange and centered by the holding means can be made to coincide with each other in the circumferential direction, and then the moving means can insert the portion of the insertion hole between the push wheel and the flange of the receiving port. It is possible to push the externally fitted seal material between the socket insertion ports in the socket flange by this push ring, and to pass the screw part of the bolt held by the holding means through the bolt hole of this push ring. Therefore, the sealing material of the pipe joint and the push ring can be set at predetermined positions efficiently, accurately, and without requiring any manpower. Further, since the holding means has a detachable structure, the detachment (removal) can be easily performed without being affected by the bolt.

[Brief description of drawings]

FIG. 1 shows an example of an embodiment of the present invention and is an enlarged detailed view of a first plate and its periphery in a pipe joining apparatus.

FIG. 2 is an overall front view of the pipe joining apparatus.

3 is a side view of the portion shown in FIG. 1. FIG.

FIG. 4 is an enlarged detailed view of the second plate and its periphery in FIG.

5 is a side view of the portion shown in FIG. 4. FIG.

6 is a side view of a third plate and its surroundings in FIG. 2. FIG.

FIG. 7 is a sectional view of a pipe joint to be joined by the pipe joining apparatus of the present invention.

8 is a plan view of the T-head bolt in FIG. 7. FIG.

9 is a side view of the push ring in FIG. 7. FIG.

[Explanation of symbols]

 1 One pipe 2 Receptacle 3 Other pipe 4 Insert 7 Flange 9 Sealing material 10 Push ring 11 Bolt hole 15 T-head bolt 16 Bolt head 17 Nut 21 First plate 22 Cylinder device 23 Second plate 28 Frame 30 Bolt setter plate 33 Bolt fixing part 42 Push ring setter 46 Rack 50 steps

Claims (1)

[Claims] 1. A pipe joint in a state in which an insertion opening of one pipe in the horizontal direction is inserted into an insertion opening of the other pipe, and an annular sealing material disposed between the insertion openings is provided in the opening of the reception opening. A device for compressing by a push ring bolted to an end flange, which retains the head of the bolt passed through the flange by detachably fitting it to the receiving port of the one pipe. Holding means for holding the push ring fitted to the insertion opening on the frame placed from above the one and the other pipes, and bolts passed through the bolt hole of the push wheel and the flange. And a means for rotating the push wheel so as to coincide with each other in the circumferential direction, and by moving the push wheel in a direction approaching the flange of the receiving opening, the insertion opening between the pressing wheel and the flange of the receiving opening Sealing material that is fitted to the part A pipe that is provided with a moving means that pushes the screw portion of the bolt held by the holding means through the bolt hole of the pushing wheel while pressing the pushing wheel between the receiving and inserting openings in the flange portion. Joining equipment.