JP5444114B2 - Pipe fitting - Google Patents

Description

  The present invention provides a pair of first joint and second joint sandwiched from the radial direction with respect to the existing pipe, and the first joint and the second joint sandwiching the existing pipe are connected to each other on both the left and right sides of the existing pipe. A mounting portion of the clamping bolt device to be brought close is provided in the first joint and the second joint, an opening communicating with the work port drilled in the existing pipe is provided in the first joint, and a flange portion is provided around the opening. And a communicating port portion of a partition valve with an open / close shutter is configured to be press-contactable to the flange portion via a seal ring, and a insertion portion of a pressing bolt for pressing the communicating port portion against the flange portion is formed in the partition. The present invention relates to a pipe joint in which a connecting portion of the pressing bolt is provided in the clamping bolt device while being provided in the valve.

In general, Patent Document 1 discloses that an existing pipe such as an existing gas pipe is drilled in an active pipe state, and a bypass pipe is connected to the drilled working port to repair a pipe to be repaired. A pipe joint similar to the pipe joint shown is attached to an existing pipe, and for example, a drilling device or a guide pipe of an in-pipe repair device is attached through the gate valve attached to the pipe joint.
Therefore, when the gate valve is fixed to the pipe joint by the pressing bolt, the communication port part of the gate valve is pressed against the flange part via a seal ring. As shown in FIGS. 7 and 8, the flange provided around the opening of the first joint is merely formed with a substantially uniform width.

Japanese Patent No. 2609149

  In order to attach the gate valve 10 to the above-described conventional pipe joint, when the pressing bolt 13 is inserted into the insertion portion 14 and the partition valve 10 is pressed against the pipe joint, the pressing bolt 13 is moved to the first joint 3. And the insertion portion of the gate valve 10 that is larger than the flange portion 8 and protrudes to the left and right side portions of the existing pipe 1 because the second joint 4 is attached to the connecting portion of the clamping bolt device 5. If the pressure bolt 13 is tightened too much in order to prevent leakage between the flange portion 8 and the communication port portion 11 because the pressure bolt 13 presses the vicinity thereof, the gate valve 10 is greatly strained. This makes it difficult to open and close the open / close shutter 9 provided on the gate valve 10, and this is especially true when the gate valve 10 is made of an aluminum material to reduce the weight. Problem has become greater.

  Accordingly, an object of the present invention is to eliminate the above-mentioned problems and to allow a partition operation by the partition valve to be performed satisfactorily while maintaining a high sealing performance between the pipe joint and the partition valve.

  A first characteristic configuration of the present invention is a first joint in which a pair of first joints and second joints sandwiched from the radial direction with respect to an existing pipe are provided, and the existing pipes are sandwiched between right and left side portions of the existing pipe. A mounting portion of the clamping bolt device that brings the first joint and the second joint close to each other is provided in the first joint and the second joint, and an opening that communicates with a work port drilled in an existing pipe is provided in the first joint, A pressure bolt for providing a flange portion around the portion, and configured so that the communication port portion of the gate valve with the opening / closing shutter can be pressed against the flange portion via a seal ring, and presses the communication port portion against the flange portion A pipe joint in which the connecting part of the pressing bolt is provided in the clamping bolt device, and receives and supports the vicinity of the inserting part of the pressing bolt in the partition valve. Valve seat A seat, from the flange portion where you have extended the series to the mounting portion.

According to the first characteristic configuration of the present invention, when the pressing bolt is inserted into the insertion portion and the gate valve is pressed against the pipe joint, the flange protrudes to the left and right side portions of the existing pipe larger than the flange portion. In addition, as shown by the phantom line in FIG. 8, the vicinity of the insertion portion in the gate valve is a gate valve seat base portion in which the dimension indicated by L in the drawing extends from the flange portion 8 to the mounting portion side in series. To prevent the gate valve from being distorted.
Therefore, the partitioning operation of the gate valve can be favorably maintained while preventing leakage of fluid from between the flange portion of the pipe joint and the communication portion of the gate valve.

  According to a second characteristic configuration of the present invention, the gate valve seat base is formed in a shape along the axial direction of the existing pipe.

  According to the second characteristic configuration of the present invention, in addition to being able to achieve the above-described operational effects according to the first characteristic configuration of the present invention, the partition valve receiving pedestal is disposed along the axial direction of the existing pipe. By adopting the shape, the area for receiving and supporting the gate valve increases, and the gate valve can be received more stably and its deformation can be prevented.

  The third characteristic configuration of the present invention resides in that a rib for backing up the gate valve seat on the existing pipe side is provided integrally with the first joint.

  According to the third characteristic configuration of the present invention, the partition valve receiving pedestal portion can be reinforced by the rib provided integrally with the first joint, and the support function for the partition valve is improved.

It is a disassembled perspective view before the assembly | attachment of a pipe joint and a gate valve. It is a perspective view of the state where the gate valve was attached to the pipe joint. It is a vertical side view of the state which attached the gate valve to the pipe joint. It is a vertical front view of the state which attached the gate valve to the pipe joint. It is a partial longitudinal cross-sectional front view of the state which attached the perforation apparatus through the gate valve. It is a partial longitudinal cross-sectional front view of the state which attached the attachment apparatus through the gate valve. It is a disassembled perspective view of the pipe joint of a prior art example. It is a vertical side view which shows the state which assembled | attached the pipe joint of the prior art example to the existing pipe.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 to 4, an existing pipe 1 such as an existing gas pipe is drilled in a live pipe state, and a bypass pipe is connected to the drilled working port 2 to repair a repair target pipe section. Therefore, as a pipe joint to be attached to the existing pipe 1, a pair of metal first joints 3 and second joints 4 sandwiched from the radial direction and a second joint 4 along the surface of the existing pipe 1, respectively. A clamping bolt device that is provided on the right and left sides of the existing pipe 1 (both sides in a direction orthogonal to the axial direction of the existing pipe) and that causes the first joint 3 and the second joint 4 sandwiching the existing pipe 1 to be close to each other 5 is provided in the first joint 3 and the second joint 4, and an oval opening 7 communicating with the working port 2 drilled in the existing pipe 1 is provided in the first joint 3. Is provided with a flange portion 8 having a uniform width, and the communication port portion 11 of the gate valve 10 with the opening / closing shutter 9 is The flange portion 8 is configured to be press-contactable via a seal ring 12 made of metal, and an insertion portion 14 for a pressing bolt 13 for pressing the communication port portion 11 against the flange portion 8 is provided in the gate valve 10. The connecting portion 15 is provided in the clamping bolt device 5.
The clamping bolt device 5 includes a pair of bolts 27 and nuts 28, and a connecting portion 15 is formed in a part of the plurality of nuts 28.
The gate valve 10 is mainly made of aluminum for weight reduction. In the figure, 16 is an opening / closing operation handle that slides the shutter to open / close, and 17 in the figure is a handle portion when the gate valve 10 is carried.
In the figure, 18 is a rubber seal ring for bringing the first joint 3 into intimate contact with the surface of the existing pipe 1.

The pipe joint includes a punching device 19 (FIG. 5) for forming the working port 2 in the existing pipe 1, and an attachment device 21 (FIG. 6) for inserting the guide pipe 20 for inserting the repair tool in the pipe. 10 to be detachably attached.
In the figure, reference numeral 22 denotes a bolt for attaching a lid member (not shown) attached to the flange portion 8 after removing the gate valve 10 to close the opening 7 when a series of operations such as pipe repair work is completed. The holes are not used when the gate valve 10 is attached.

When the gate valve 10 is attached to the pipe joint, the vicinity of the insertion portion 14 of the pressing bolt 13 in the gate valve 10 is received and supported while maintaining a high sealing performance between the two, thereby preventing distortion deformation of the gate valve 10. The partition valve receiving pedestal portion 23 that covers the flange portion 8 to the mounting portion 6 side so as to cover about 70% of the maximum width of the partition valve 10 in the radial direction of the existing pipe 1 and the axial direction of the existing pipe 1 Are extended by the dimension indicated by L in FIG.
In addition, a rib 24 that is continuously provided upward from near the mounting portion 6 of the first joint 3 is integrally formed on the lower side of the partition valve receiving pedestal portion 23 so as to receive the pressing force accompanying tightening by the pressing bolt 13. Reinforced so that it can.

FIG. 5 shows a state in which the perforation device 19 is attached to form the work port 2 in the existing pipe 1 after the pipe joint and the gate valve 10 are attached.
The punching device 19 attached to the gate valve 10 has a hole saw 25 that can be moved up and down freely, and can be reciprocated by a set amount in the axial direction of the existing pipe 1 to form three holes for drilling. The working port 2 is configured to be a long hole.

After the working port 2 is formed in the existing pipe 1 by the punching device 19, an attachment device 21 for the insertion guide pipe 20 is attached to the gate valve 10 in order to insert the in-pipe repair tool into the existing pipe 1. The state is shown.
The insertion guide tube 20 is attached to an attachment device 21 so as to be retractable with respect to the existing tube 1.
In the figure, reference numeral 26 denotes an observation window for the work port 2.

[Another embodiment]
Other embodiments will be described below.

<1> The shape of the partition valve receiving pedestal 23 is not limited to the shape shown in FIG. 1, and may be any shape as long as it receives the vicinity of the insertion portion 14 of the pressing bolt 13.
<2> The shape of the working port 2 and the opening 7 corresponding to the working port 2 may be a perfect circle other than an oval shape.

  In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Existing pipe 2 Work port 3 1st joint 4 2nd joint 5 Clamping bolt apparatus 6 Mounting part 7 Opening part 8 Flange part 9 Opening / closing shutter 10 Partition valve 11 Communication port part 12 Seal ring 13 Pressing bolt 14 Insertion part 15 Connection part 23 Divider valve pedestal 24 rib

Claims (3)

Provide a pair of first joint and second joint sandwiched from the radial direction to the existing pipe,
The first joint and the second joint are provided with a clamping bolt device mounting portion for bringing the first joint and the second joint sandwiching the existing pipe close to each other on both the left and right side portions with respect to the existing pipe,
The first joint is provided with an opening communicating with a work port drilled in an existing pipe,
A flange is provided around the opening,
The communication port portion of the gate valve with an open / close shutter is configured to be press-contactable to the flange portion via a seal ring,
A pipe joint in which a pressing bolt insertion portion for pressing the communication port portion against the flange portion is provided in the gate valve, and a connecting portion of the pressing bolt is provided in the clamping bolt device,
A pipe joint in which a partition valve receiving pedestal portion that receives and supports the vicinity of the insertion portion of the pressing bolt in the gate valve extends in series from the flange portion to the mounting portion side.   The pipe joint according to claim 1, wherein the partition valve seat base is formed in a shape along the axial direction of the existing pipe.   The pipe joint according to claim 1 or 2, wherein a rib for backing up the gate valve seat on the existing pipe side is provided integrally with the first joint.

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