JP2001146996A - Valve attaching device for fluid transport pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform even internal work in regard to cutting work of a valve insertion hole or insertion work of a water cut-off valve element by the most efficient combination and without detaching a cutting means. SOLUTION: A housing C partitioning a sealed work space S1 on an outer circumferential side of a portion of a fluid transport pipe A for forming the valve insertion hole 3 is held rotatably around a pipe axial center of the fluid transport pipe A. The housing C is provided with a cutting means D cuttingly forming the valve insertion hole 3 on a pipe wall 1 of the fluid transport pipe A in association with a rotational movement of the housing C around the pipe axial center, and a valve operating means E inserting for moving the water cut-off valve element 2 through the cuttingly formed valve insertion hole 3 from a pipe radial direction. An attaching part 21 for internal work is formed on a portion of the housing C different from an attaching part 16 of the cutting means D.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of forming a valve insertion port on a pipe wall of a fluid transport pipe such as a water pipe while maintaining the flow of fluid in the pipe, and then passing the formed valve insertion port in the pipe radial direction. The present invention relates to a valve mounting device used when a water stop valve is inserted from the outside.

[0002]

2. Description of the Related Art In a conventional apparatus for mounting a valve for a fluid transport pipe, as shown in FIGS. 19 and 20, a water stop valve element 2 is inserted from the outside in the radial direction of the outer circumference of a fluid transport pipe A. A housing C defining a working space S1 sealed on the outer peripheral surface side of a portion where the valve insertion port 3 is formed, is composed of two divided housings C1 and C2 that can be freely connected in the pipe circumferential direction, Further, one of the first divided housings C1 is composed of a semi-cylindrical cover body 50 that can be externally mounted on the fluid transport pipe A from one side in the pipe diameter direction, and the other second divided housing C2 is formed. A semi-cylindrical cover body 51A that can be externally mounted on the fluid transport pipe A from the other side in the pipe radial direction.
A first cover 51 having a valve guide cylinder 51B for guiding the water stopping valve 2 along the pipe diameter direction; and a connection flange 51 formed at an upper end of the valve guide cylinder 51B.
In order to accommodate the water stopping valve body 2 at a position which is provided with a connecting flange portion 54a which can be connected to the fluid transport pipe A via the bolt 52 and the nut 53 and which is spaced apart from the outer peripheral surface of the fluid transport pipe A in the pipe radial direction. And a second cover 54 formed by the valve guide cylinder 51B.

Further, bolts 52 and nuts are provided at both ends in the circumferential direction of the semi-cylindrical cover body 50 of the first split housing C1 and at both circumferential ends of the semi-cylindrical cover body 51A of the second split housing C2. The connecting flange portions 50a and 51b fastened through the 53 are integrally formed, and the semi-cylindrical cover body 51A of the second split housing C2 is rotated around the pipe axis X of the housing C. As a result, a mounting portion 55 having a through hole 55a into which an end mill 56 of the cutting means D for cutting and forming the valve insertion port 3 is formed in the pipe wall 1 of the fluid transport pipe A from the pipe radial direction is formed. The casing 57 of the cutting means D is connected to the connecting flange 55b of the
Is detachably mounted.

Further, a screw hole 5 is formed in a core material of the water stopping valve body 2.
9 and a screw shaft 58 screwed into a screw hole 59 in the second cover 54 of the second split housing C2.
Is mounted so as to be rotatable only with its operation shaft portion 58a protruding to the outside. The water stop valve located in the storage space S2 by the expansion and contraction operation by the screwing operation of the screw shaft 58 and the screw hole 59. A valve operating means E for inserting and moving the body 2 through the cut-out valve insertion port 3 into the pipe is formed.

A first divided housing C is provided on the outer peripheral surface of the fluid transport pipe A in a region including a portion corresponding to the valve insertion opening.
1 semi-cylindrical cover body 50 and second split housing C2
Of the semi-cylindrical cover body 51A through an elastic sealing material, and connecting the connecting flange portions 50a, 51b of the two semi-cylindrical cover bodies 50, 51A, which are attached with the jacket, via bolts 52 and nuts 53. Then, the housing C is rotatably mounted around the pipe axis X in a state where a sealed work space S1 is defined on the outer peripheral surface side of the fluid transport pipe A at a position corresponding to the valve insertion opening.

Next, while the end mill 56 of the cutting means D is driven and rotated, it is fed to the tube axis X side, and the entire housing C is manually rotated around the tube axis X,
An oval valve insertion port 3 is formed in the pipe wall 1 of the fluid transport pipe A along the circumferential direction by cutting. When this cutting process is completed,
The end mill 56 of the cutting means D is retracted to the initial standby position, and the entire housing C is manually rotated around the pipe axis X to the original position.
The rotation of the operation shaft portion 58a of the screw shaft 58 constituting
The water stopping valve body 2 located in the storage space S2 is inserted and moved inside the pipe through the cut-out valve insertion port 3, and the valve body 2 blocks the flow path in the fluid transport pipe A.

[0007]

In the conventional valve mounting device for a fluid transport pipe, the connecting flange portion 55b of the mounting portion 55 formed on the semi-cylindrical cover body 51A of the second divided housing C2 can be freely opened and closed. Since the working valve 17 is detachably attached and the casing 57 of the cutting means D is detachably attached to the working valve 17, for example, a valve insertion port cut and formed in the fluid transport pipe is provided. In the case where it becomes necessary to inspect the machining state of No. 3, after the end mill 56 of the cutting means D is retracted to the initial standby position, the casing 57 of the cutting means D is removed from the closed operation valve 17. A method of attaching an endoscope to the working valve 17 or attaching a confirmation window to the through hole 55a of the mounting portion 55 through the opening of the working valve 17 is adopted.

However, when the endoscope 56 of the cutting means D needs to correct the valve insertion port 3 as a result of the inspection using the endoscope or the confirmation window, the endoscope or the confirmation window is removed and the cutting means is removed. D had to be reattached, causing a reduction in work efficiency.

The cutting means breaks down under the condition that the end mill 56 of the cutting means D protrudes into the working space S1 of the housing C through the through hole 55a of the mounting portion 55, and particularly, the housing C is operated by rotating. If a situation occurs where the cutting means D cannot be removed while the working valve 17 is kept open and operated, the fluid transport pipe A
The existing gate valve provided on the upstream side of the portion corresponding to the formation of the valve insertion port must be searched for and closed.
As a result, not only does it take time to remove the failed cutting means D, but also the supply of fluid is stopped until the removal operation is completed.

[0010] The present invention has been made in view of the above situation, and its main problem is that even when an internal operation related to a cutting operation of a valve insertion port or an insertion operation of a water stop valve is performed. It is another object of the present invention to provide a fluid transport pipe valve mounting device which can be efficiently performed with the most efficient combination without removing the cutting means one by one.

[0011]

According to a first aspect of the present invention, there is provided a fluid transport pipe valve mounting apparatus which comprises a valve for inserting a water stop valve element from a radial outside of a fluid transport pipe. A housing that defines a working space sealed on the outer peripheral surface side of the place where the insertion port is formed is rotatably held around a pipe axis of a fluid transport pipe, and the housing includes a pipe of the housing. Cutting means for cutting and forming a valve insertion port in the pipe wall of the fluid transport pipe with rotation around the axis, and
Valve operating means for inserting and moving a water stop valve element from a pipe diameter direction through a cut-formed valve insertion port, wherein internal working is performed at a portion of the housing different from the mounting portion of the cutting means. The point is that the mounting portion is formed.

[0012] According to the above-mentioned characteristic configuration, the mounting portion for mounting the cutting means and the mounting portion for internal work are formed in the housing rotatably held around the axis of the fluid transport pipe. Therefore, at the same time as attaching the cutting means to one mounting part, the other internal working mounting part,
Attaching an endoscope or a confirmation window for monitoring or inspecting the cutting state of the valve insertion port by the cutting means or the processing state of the cut-formed valve insertion port, or accompanying the cutting processing of the valve insertion port by the cutting means. It is possible to attach cutting chip discharging means for discharging generated cutting chips outside the housing, so there is no need to remove and remove the cutting means one by one as in a conventional valve mounting device. It is also possible to carry out in parallel at the same time.

Therefore, even when performing an internal operation related to a cutting operation of the valve insertion port or an insertion operation of the water stopping valve body, it is not necessary to remove the cutting means one by one, and furthermore, various operation means are required for each mounting portion. Can be selectively attached, so that the cutting operation or the valve insertion operation and the internal operation related thereto can be efficiently performed with the most efficient combination.

According to a second aspect of the present invention, in the valve mounting device for a fluid transport pipe, the mounting portion for internal working is formed at a position deviated in the pipe circumferential direction with respect to the mounting portion of the cutting means, and And the cutting means can be attached.

According to the above-mentioned characteristic configuration, the mounting portion for internal working is formed at a position different from the mounting portion of the cutting means in the circumferential direction of the pipe. Even if the cutting means breaks down in the situation where it is located in the space and the housing can be rotated but the failed cutting means cannot be removed, another cutting means can be attached to the internal working mounting portion. By mounting the valve, the valve insertion port can be reliably formed at a predetermined position of the fluid transport pipe.

Accordingly, even if the housing can be rotated, but the broken cutting means cannot be removed, the other internal working mounting portion can be used as the mounting portion for the cutting means. Unlike a conventional valve mounting device, there is no need to find and close an existing gate valve provided upstream of a portion corresponding to the valve insertion port of the fluid transport pipe, and it is possible to quickly perform failure of the cutting means,
Can be easily dealt with.

According to a third aspect of the present invention, there is provided a valve mounting device for a fluid transport pipe, wherein a mounting portion of the cutting means and a mounting portion for internal working are distributed and arranged at positions symmetrical with respect to the valve operating means. There is in the point.

According to the above-mentioned characteristic configuration, since the two mounting portions are arranged separately by utilizing the space on both sides in the circumferential direction of the valve operating means, the attachment / detachment of the working means to / from the one mounting portion can be prevented. The work means attached to the mounting portion is not hindered, and the work of attaching and detaching each work means can be performed efficiently and easily.

According to a fourth aspect of the present invention, there is provided a valve mounting device for a fluid transport pipe, wherein the housing is constituted by a plurality of divided housings which can be freely connected in the circumferential direction of the pipe. The split housing is characterized in that a storage portion for storing the water blocking valve at a position separated from the outer peripheral surface of the fluid transport pipe, a mounting portion for the cutting means, and a mounting portion for internal work are formed.

According to the above-mentioned characteristic structure, the housing is constituted by a plurality of divided housings so that the housing can be easily mounted on the existing fluid transport pipe. Since the storage part, the mounting part of the cutting means and the mounting part for internal working are formed in a specific split housing, the positional relationship between the storage part and the two mounting parts can be maintained constant. .

According to a fifth aspect of the present invention, there is provided a valve mounting device for a fluid transport pipe, wherein the cutting means includes a rotary cutting tool for cutting and forming a valve insertion port as the pipe is rotated in the circumferential direction. It is characterized in that a feed means for moving the rotary cutting tool in the pipe diameter direction and a driving means for driving and rotating the rotary cutting tool are provided.

According to the above feature, the rotary cutting tool driven and rotated by the driving means is moved in the circumferential direction of the pipe by rotating the housing around the pipe axis.
Since a valve insertion port having a predetermined angle can be formed, if the thickness of the water stopping valve body in the pipe axis direction is constant, a plurality of types of fluid transport pipes having different pipe diameters using a single cutting means. A valve insertion port can be formed in the valve.

According to a sixth aspect of the present invention, there is provided a fluid transport pipe valve mounting apparatus, wherein the housing is fixed to a guide support portion which is fixed to a portion of the fluid transport pipe excluding a portion where a valve insertion port is formed. In that it is held rotatably around the pipe axis of the fluid transport pipe.

In general, when the housing is directly mounted on the outer peripheral surface of the fluid transport pipe having low surface treatment accuracy, the housing can be rotationally mounted on the outer peripheral surface of the fluid transport pipe via an elastic seal material within a range where the housing can be rotated. It is necessary to perform a strong tightening operation until fluid leakage does not occur when the valve insertion port is formed by cutting, and as a result, frictional resistance between the outer peripheral surface of the fluid transport pipe and the relative rotation surface between the housing and the housing increases. Therefore, the rotation operation of the entire housing around the pipe axis tends to be heavy.

However, according to the present invention, the guide support portion is fixed in a jacket state to a portion of the outer peripheral surface of the fluid transport pipe having a low surface treatment accuracy except a portion corresponding to the valve insertion port, and the fixed guide support is fixed. Since the housing provided with the cutting means and the valve operating means is rotatably held around the pipe axis of the fluid transport pipe, the guide support section has no fluid leakage on the outer peripheral surface of the fluid transport pipe. While firmly fixed in the state, the sealing performance of the working space formed in the housing is enhanced, while the housing itself rotates around the pipe axis along the holding part of the guide support part, so that the fluid transport pipe In addition to being affected not only by the surface treatment accuracy of the outer peripheral surface, but also by the effects of corrosion and deformation, the relative rotation between the guide support and the housing can be machined with high precision in a well-equipped factory. Can From, it is possible to reduce the rotational resistance while reliably sealed the relative rotation unit.

Therefore, even when the fluid transport pipe is deformed by an external force caused by earth pressure at the time of embedding or uneven settlement, or when the outer peripheral surface of the fluid transport pipe is corroded, The rotation operation of the housing at the time of cutting the valve insertion opening can be reliably and easily performed with a small operation force while reliably preventing leakage.

A feature of the fluid transport pipe valve mounting apparatus according to claim 7 of the present invention resides in that a drive means for driving and rotating a housing with respect to the guide support portion is detachably provided.

According to the above-mentioned characteristic configuration, the rotation operation of the housing at the time of cutting the valve insertion port can be easily performed by utilizing the driving force of the driving means, and after the valve insertion port is cut and formed. Alternatively, after the water stopping valve element is inserted into the fluid transport pipe through the valve insertion port, the driving means can be freely removed, so that the driving means can be diverted to another valve mounting device.

According to a feature of the valve mounting device for a fluid transport pipe according to the eighth aspect of the present invention, the maximum rotation angle of the housing with respect to the guide support portion is restricted to a cutting angle around the pipe axis of the valve insertion port. The point is that a rotation angle regulating means is provided.

According to the above-mentioned characteristic configuration, even when the housing is manually rotated with respect to the guide support portion, only by rotating the housing within the rotation angle range regulated by the rotation angle regulating means, Since the valve insertion port having a predetermined angle can be reliably formed by cutting, the cutting operation can be facilitated and the efficiency can be improved.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIGS. 1 to 10
The water-stop valve 2 is placed on the pipe wall 1 of the fluid transport pipe A such as a water pipe or a gas pipe in an uninterrupted state with the fluid flowing in the fluid transport pipe A from the outside in the pipe radial direction. After the valve insertion port 3 for insertion is formed, the valve mounting device of the present invention used when the water stopping valve body 2 is inserted from the outside in the pipe diameter direction through the formed valve insertion port 3, Of the fluid transport pipe A,
A guide support portion B is fixed to a required portion other than the portion corresponding to the valve insertion port formation in a state where the space between the guide support portion B and the outer peripheral surface of the fluid transport pipe A is sealed, and the guide support portion B is fixed. A housing C defining a working space S1 sealed on the outer peripheral surface side of the fluid transport pipe A at a location corresponding to the valve insertion port is rotatably fitted around the pipe axis X of the fluid transport pipe A ( The housing C is provided with a valve along the pipe circumferential direction (circumferential direction) on the pipe wall 1 of the fluid transport pipe A as the housing C rotates around the pipe axis X. A cutting means D for cutting and forming the insertion port 3 and a valve operating means E for inserting and moving the water stop valve element 2 from the outside in the pipe diameter direction through the cut and formed valve insertion port 3 are provided.

Further, the rotation angle at which the maximum rotation angle (rotation angle range) θ of the housing C with respect to the guide support portion B comes into contact with the cutting angle about the pipe axis X of the valve insertion port 3 as a center. The guide support portion B and the housing are arranged such that the regulating means F and the center position of the valve insertion port 3 in the pipe circumferential direction (circumferential direction) coincide with the center position of the water stopping valve body 2 in the pipe circumferential direction. There is provided a connecting means G for fixedly connecting the housing C with the shaft C, and a shaft center movement restricting means H for restricting (preventing) relative movement of the housing C relative to the guide support portion B in the direction of the tube axis X.

As shown in FIGS. 2 and 4, the guide support portion B is a pair of support members which are fixed in a jacket state on both sides in the X-axis of the fluid transport tube A at positions corresponding to the valve insertion opening. B1 and B2, and on the outer peripheral surface of each of the supports B1 and B2, a rotation guide surface (slidably guides the housing C so as to be rotatable around the pipe axis X of the fluid transport pipe A). One example of a rotation guide portion) 5A is formed.

Each of the supports B1 and B2 is shown in FIG.
As shown in FIG. 5, each of the divided support members is composed of a semi-cylindrical divided support member 5 which is divided into two parts in the circumferential direction of the tube which can be mounted on the fluid transport pipe A from both sides in the pipe diameter direction. At each of a plurality of places at both ends in the circumferential direction of the pipe 5 and at predetermined intervals in the direction of the pipe axis X, the bolts 6 as an example of a fastening means are provided with the two divided support bodies 5 covered with the fluid transport pipe A. A bolt insertion hole 5a for fastening through the nut 7 and a concave portion 5b into which the head 6a of the bolt 6 inserted into the bolt insertion hole 5a and the nut 7 screwed to the bolt 6 are respectively formed. ing.

The inner surface of each divided support body 5 is formed as a semi-cylindrical surface having the same or substantially the same inner diameter as the outer diameter of the fluid transport pipe A, and the rotation guide surface 5A of each divided support body 5. Of the inner peripheral surface of the housing C
It is configured to be slightly smaller than the inner diameter of the part that is slid and guided by the rotation guide surface 5A.

The bolt insertion hole 5a is formed at a position where the head 6a of the bolt 6 inserted therein and the nut 7 screwed to the bolt 6 enter the pipe radially inward from the rotation guide surface 5A. And the two split support bodies 5
When fastened by the nut 7, the head 6a and the nut 7 of the bolt 6 located in the recess 5b do not protrude outward in the pipe diameter direction than the rotation guide surface 5A, and the housing C is rotated by the rotation guide surface. It is configured to be able to smoothly rotate around the pipe axis X of the fluid transport pipe A along 5A.

The inner surface of each of the divided support members 5 is provided between the inner surface of the divided support member 5 and the outer peripheral surface of the fluid transport pipe A and between the adjacent ends of the two divided support members 5 in the pipe circumferential direction. A seal holding groove 5c for holding a loop-shaped elastic sealing material 8 for sealing the valve support is formed, and a portion corresponding to the valve insertion port formation is provided at both ends of each of the divided support bodies 5 in the pipe axis X direction. The outermost end farthest from the
A fixing bolt, which is an example of a fixing means for fastening the divided support bodies 5 to the fluid transport pipe A after fastening the two divided support bodies 5 to each other in the pipe circumferential direction after fastening the divided support bodies 5 to each other in the fluid transport pipe A, 9 is formed with a screw hole 5d. That is, when the two split support members 5 sheathed in the fluid transport pipe A are fastened through the bolts 6 and the nuts 7 of the fastening means, the two split support members 5 are drawn to the reduced diameter side with this fastening operation, When the rotation guide surface 5A is fastened to a substantially circular shape or a state close to the true shape centered on the pipe axis X of the fluid transport pipe A, the elastic support attached to the seal holding groove 5c of each divided support body 5 is formed. The sealing material 8 is compressed to a sealed state. Therefore, both the split support members 5 can be tightened and fixed to the fluid transport pipe A only by this fastening operation. However, in order to more reliably prevent the position shift between the two split support members due to external force such as vibration, The two divided support bodies 5 are fixed to the fluid transport pipe A with fixing bolts 9.

As shown in FIGS. 1 to 4, the housing C is composed of two divided housings C1 and C2 which can be freely connected in the circumferential direction of the tube. A semi-cylindrical cover body 10 that can be jacketed from one side in the radial direction of the pipe with respect to the rotation guide surfaces 5A of the two support bodies B1 and B2 attached to the transport pipe A, and the other. Second split housing C2
Are two supports B1, B attached to the fluid transport pipe A.
A semi-cylindrical cover body 11A and a water stopping valve body 2 that can be externally mounted on the other rotation guide surface 5A from the other side in the pipe diameter direction
Cover 11 provided with a valve guide cylinder 11B for moving and guiding the valve guide along the pipe radial direction, and a bolt 13A provided on a connection flange 11a formed at the upper end of the valve guide cylinder 11B.
A connecting flange 12 connectable via a nut 13B
a, and a valve operation space S3 communicating with a storage space S2 for accommodating the water stopping valve body 2 at a position radially outwardly from the outer peripheral surface of the fluid transport pipe A in the valve guide. And a second cover 12 formed of a cylindrical body 11B.

The storage space S2 of the valve guide cylinder 11B
Is formed in communication with a working space S1 formed between the inner surface of the second divided housing C2 and the fluid transport pipe A, and the inner peripheral surface of the semi-cylindrical cover body 10 of the first divided housing C1. Each support body B is provided on the inner peripheral surface of the semi-cylindrical cover body 11A of the second divided housing C2.
Seal holding grooves 10e, 1 for holding a loop-shaped elastic sealing material 22 for sealing between the rotation guide surfaces 5A of the first and second rotation guide surfaces 5A.
1 g is formed.

Bolts 14A and nuts are provided at both ends in the circumferential direction of the semi-cylindrical cover body 10 of the first split housing C1 and at both circumferential ends of the semi-cylindrical cover body 11A of the second split housing C2. End flanges, which are an example of a rotary cutting tool of the cutting means D, are formed integrally with connecting flange portions 10a, 11b fastened via the respective 14B, and are provided on the semi-cylindrical cover body 11A of the second split housing C2. Alternatively, a first mounting portion 16 having a through hole 16a into which a working portion of an internal working device such as an endoscope 20 can be inserted is formed. The first mounting portion 16 has a work valve that can be opened and closed freely. A connecting portion 16b to which other devices such as 17 are detachably connected via bolts 25 and the like, a stopper 18 for closing the through hole 16a (see FIG. 1), and a state inside the housing C are removed. Check window 19 for visual confirmation from
(See FIG. 9) Screw part 16 for detachably mounting the like
c is formed.

In the semi-cylindrical cover body 11A of the second split housing C2, a portion on the same or substantially the same circumferential line different from the first mounting portion 16 of the cutting means D in the pipe circumferential direction (circumferential direction). In addition, a cutting means D can be attached to the first mounting portion 16 at a symmetric position about the operating axis of the valve operating means E with respect to the symmetric center via a work valve 17 which can be opened and closed freely. Two mounting portions 21 are formed.

The second mounting portion 21 has the same shape as the first mounting portion 16 and has a through hole into which an end mill 15 or an endoscope, which is an example of a rotary cutting tool of the cutting means D, can be inserted. 21a, a connecting flange portion 21b to which other devices such as a work valve 17 which can be freely opened and closed are detachably connected via bolts 25 and the like, a closing plug 18 for sealing the through-hole 21a, and an internal state of the device. And a screw portion 21c for detachably mounting a confirmation window (viewing window) 19 for visually confirming from the front.

The second mounting portion 21 includes the first mounting portion 1
6, the cutting means D attached to the first attachment portion 16 breaks down, so that even if the housing C can be rotated and the cutting means D cannot be removed, 2 Another cutting means D
Can be installed to continue the work.

Further, the cutting means D is mounted on one of the first mounting portions 16 or the second mounting portions 21, and the cutting of the valve insertion port 3 by the cutting means D is mounted on the other second mounting portion 21 or the first mounting portion 16. The endoscope 20 and the confirmation window 19 for monitoring or inspecting the processing state or the processing state of the valve insertion port 3 formed by cutting, or cutting chips generated at the time of cutting the valve insertion port 3 together with a part of the fluid in the pipe. Cutting waste discharging means for discharging to the outside,
By polishing or scraping the inner peripheral surface of the fluid transport pipe A through the valve insertion opening 3 formed in the pipe wall 1 of the fluid transport pipe A, a nodule generated on the inner peripheral face of the fluid transport pipe A is formed. A pipe inner peripheral surface treatment means for removing rust, sediment, etc. can be attached, so that multiple operations can be performed simultaneously, or
The other device can be removed during one operation, and the workability can be improved.

As shown in FIGS. 1 and 2, the valve operating means E is a screw which is mounted on the second cover 12 of the second split housing C2 so that the operating shaft 23a protrudes to the outside so that it can only rotate. The shaft 23 and the screw hole 24 formed in the core material of the water blocking valve body 2 are located in the storage space S2 by the expansion and contraction operation by the screwing operation of the screw shaft 23 and the screw hole 24. The water stopping valve 2 is inserted into the pipe through the cut-out valve insertion port 3 and moved into the pipe. The water stopping valve 2 seals the valve insertion port 3 and simultaneously shuts off the flow path in the fluid transport pipe A. It is configured in.

As shown in FIGS. 3 and 4, the rotation angle restricting means F includes third connecting flange portions 11c formed at both ends of the semi-cylindrical cover body 11A of the second split housing C2 in the tube axis direction. And of the first connecting flange portion 5e formed on the support bodies B1 and B2 in a state where they face each other in the pipe axis X direction,
The housing C with respect to the guide support portion B is brought into contact with the stopper 26 provided on the first connecting flange portion 5e on the support body B1, B2 side from the circumferential direction of the tube.
The block-shaped contact portion 27 for restricting the maximum rotation angle θ to a cutting angle centered on the pipe axis X of the valve insertion port 3 is detachably mounted.

A plurality of contact portions 27 can be exchanged at a plurality of positions in the pipe circumferential direction (circumferential direction) of the third connecting flange portion 11c so as to correspond to a plurality of types of cutting angles of the valve insertion port 3. A mounting recess 11d is formed to fit and hold the mounting recess 11d.

As shown in FIGS. 3 and 7, the connecting means G includes a second connecting flange 1 on the first split housing C1 side.
0b, the third connection flange portion 11c on the second split housing C2 side, and the first connection flange portion 5e on the support bodies B1 and B2 side, and the center position in the pipe circumferential direction of the valve insertion port 3 and water stoppage. When the center position of the valve body 2 in the pipe circumferential direction coincides with the center position in the pipe axis X direction, the bolt insertion hole 1
0c, 11e, and 5f are formed in a penetrating manner, and the bolt 28 and the nut 29 inserted through the bolt insertion holes 10c, 11e, and 5f opposed to each other in the pipe axis X direction are tightened to operate the guide support portion B. And the housing A are fixedly connected.

As shown in FIGS. 2 and 7, the shaft center movement restricting means H is provided on the rotation guide surfaces 5 of the two supports B1 and B2.
5A, an annular projection 5g protruding outward in the radial direction of the pipe is integrally formed, an inner peripheral surface of the semi-cylindrical cover body 10 of the first split housing C1, and a second split housing C2.
Of the semi-cylindrical cover body 11A is freely rotatable relative to the annular projection 5g only from the outside in the radial direction of the pipe, so that the pipe axis X of the housing C with respect to the guide support portion B is formed. The annular fitting grooves 10d and 11f for restricting relative movement in the directions are formed.

As shown in FIG. 5, the cutting means D is rotated about an axis along the pipe diameter direction in a casing 31 which is detachably attached to the work valve 17 via fastening means such as bolts. A slidable cutting drive shaft 32 is provided, and a chuck portion 33 formed at the tip end of the cutting drive shaft 32 has a piercing function and a valve insertion port 3 which moves in the pipe circumferential direction in the piercing state. An end mill 15 which is an example of a rotary cutting tool having a function of cutting and forming the same is mounted so as to be freely replaceable with another type, and feed means 34 for reciprocating the end mill 15 in the pipe diameter direction, and A drive rotation unit 35 for driving and rotating the end mill 15 is provided.

The feeding means 34 is provided on the casing 31
An electric motor 34A that can be driven forward and backward as an example of a driving unit
And a feed drive shaft 34C interlocked with the cutting drive shaft 32 via a reduction gear mechanism 34B. The feed drive shaft 34C is rotatably supported around an axis perpendicular to the rotation axis of the cutting drive shaft 32. Is formed with a large number of annular locking projections 34D at a predetermined feed pitch in the axial direction, and the feed drive shaft 34C is driven by the cutting rotation of the cutting drive shaft 32 in a state of engagement with the annular locking projections 34D. And a rotation engagement body 34E for applying a feed force to the rotation engaging member 34E.

The drive rotating means 35 includes a casing 31
In addition, an electric motor 3 that can be driven forward and reverse, which is an example of a driving unit,
5A is rotatably supported by a rotary drive shaft 35C interlocked with the rotary drive shaft 35C via a reduction gear mechanism 35B.
In the output, the cutting drive shaft 32 is provided with a rotational force while allowing a sliding movement in a feed direction by driving rotation in a state of being engaged with a spline groove 35D formed in a front half shaft portion of the cutting drive shaft 32. The gear 35E is fixed.

As shown in FIG. 9, the confirmation window 19 has a screw cylinder 19A which can be selectively screwed to the screw portion 16c of the first mounting portion 16 or the screw portion 21c of the second mounting portion 21.
Of the first mounting portion 16 in the flange portion 19a of the
a or a see-through acrylic plate 19B is mounted in a state where the through hole 21a of the second mounting portion 21 is sealed.

As the endoscope 20, there are conventionally various types of endoscopes. In this embodiment, as an example, as shown in FIG. 10, a light serving as a light source and an objective lens are arranged at the distal end side. And an eyepiece 20a is provided on the base end side.

As the working valve 17, there are conventionally various types of valves. In this embodiment, as an example, as shown in FIGS. 1 and 9, the first mounting portion 16 or the second mounting portion 16 is used. A slidably movable thin plate-shaped valve body 17B for opening and closing a passage, and a valve case 17A which is detachably attached to the valve body 21 by fastening means such as bolts or the like.
An operating lever 17C for opening and closing B is assembled.

Next, a brief description will be given of a valve mounting method using the fluid transport pipe valve mounting apparatus configured as described above.
First, as shown in FIG. 1 to FIG. 3, two semi-cylindrical members forming a pair of support bodies B1 and B2 are respectively provided at both sides of the fluid transport pipe A at positions corresponding to the valve insertion port formation side in the pipe axis X direction. The divided support members 5 are jacketed from the pipe diameter direction, and the two divided support members 5 are fastened via bolts 6 and nuts 7. With this fastening operation, the two divided support bodies 5 are drawn to the reduced diameter side, and when the bolts 6 and the nuts 7 are tightened by a predetermined amount, the rotation guide surface 5A formed on the outer peripheral surface of the two divided support bodies 5 Is in a state of a perfect circle or very close to the center of the pipe axis X of the fluid transport pipe A, and in this state, the outer ends of the two divided support bodies 5 are connected to the fluid transport pipe A by the fixing bolts 9. Tighten and fix.

Next, the semi-cylindrical cover body 10 of the first split housing C1 forming the housing C and the second cylindrical body 10 extend over the rotation guide surfaces 5A of the two support bodies B1 and B2 attached to the fluid transport pipe A. The semi-cylindrical cover 11A of the two-piece housing C2 is sheathed from the radial direction, and the connecting flange 10a of the semi-cylindrical cover 10 and the semi-cylindrical cover 11
The connection flange portion 11b of the bolt A and the nut 6 in a state where rotation by manual operation around the pipe axis X of the housing C is allowed and the work space S1 is sealed with the elastic sealing material 8. 7 is fastened.

Therefore, the two support bodies B1 and B2 are firmly fixed to the outer peripheral surface of the fluid transport pipe A having a low surface treatment accuracy in a state where there is no fluid leakage, so that the working space S1 formed in the housing C can be fixed. While improving the sealing performance, the housing C itself is provided with the rotation guide surfaces 5A of the support members B1 and B2.
Is rotated around the pipe axis X along the axis, so that it is hardly affected not only by the surface treatment accuracy of the outer peripheral surface of the fluid transport pipe A, but also by the influence of corrosion and deformation.
Since the relative rotating portion between the housing 2 and the housing C can be processed with high precision in a factory or the like where facilities are provided, the rotational resistance can be reduced while securely sealing the relative rotating portion.

Therefore, even when the fluid transport pipe A is deformed by an external force caused by earth pressure at the time of embedding, uneven settlement, or the like, or when the outer peripheral surface of the fluid transport pipe A is corroded, It is possible to reliably and easily perform the rotation operation of the housing C at the time of cutting the valve insertion port 3 with a small manual operation force, while reliably preventing the leakage of the fluid.

When the mounting operation of the housing C is completed, a work valve 17 which can be opened and closed is mounted on the first mounting portion 16 or the second mounting portion 21 of the second divided housing C2 by a bolt so as to be detachable. The casing 31 of the cutting means D is detachably attached to the connecting portion of the working valve 17 via bolts or the like.

Next, as shown in FIG. 6, after the working valve 17 is opened, the feed means 34 and the drive rotating means 35 of the cutting means D are driven, and the first mounting is performed while the end mill 15 is driven and rotated. The fluid is fed to the pipe wall 1 side of the fluid transport pipe A through the through hole 16 a of the section 16 or the through hole 21 a of the second mounting section 21, and is pierced in the pipe wall 1 at the end of the end mill 15. When the perforation depth reaches the set depth, when the entire housing C is rotated around the pipe axis X by manual operation, the end mill 15 moves along the pipe circumferential direction with this rotation, The valve insertion opening 3 having a predetermined angle about the pipe axis X can be cut and formed.

When the valve insertion port 3 cannot be cut by a single rotation operation of the housing C, the valve insertion port 3 is cut and formed while the end mill 15 is fed by the feeding means 34. The housing C is rotated in the pipe circumferential direction until the housing C is rotated.

The valve insertion port 3 by the cutting means D
In the case where it is necessary to monitor or inspect the cutting processing state of the above or the processing state of the valve insertion port 3 formed by cutting, the other second mounting portion 21 or the first mounting portion 16 is attached as shown in FIG. When the endoscope 20 or the confirmation window 19 as shown in FIG. 9 is attached, and it is necessary to discharge cutting chips generated at the time of cutting the valve insertion port 3 to the outside together with a part of the fluid in the pipe. Is the other of the second mounting portion 21 or the first mounting portion 16
Then, a cutting chip discharging means (not shown) is attached.

Further, when it is necessary to remove rust nodules and deposits generated on the inner peripheral surface of the fluid transport pipe A which comes into contact with the water stopping valve body 2 after the valve insertion opening 3 is formed by cutting. Is a pipe inner peripheral surface processing means for polishing or scraping the inner peripheral surface of the fluid transport pipe A through the valve insertion opening 3 formed in the pipe wall 1 to the other second mounting portion 21 or the first mounting portion 16. Install.

Next, when the cutting of the valve insertion port 3 is completed, as shown in FIGS. 7 and 8, both support bodies B1, B2
, The center position of the valve insertion port 3 in the circumferential direction of the pipe is matched with the center position of the water blocking valve body 2 in the circumferential direction of the housing C. The housing A is fixedly connected with the connecting means G. In this state, the operating shaft portion 23a of the valve operating means E is operated to insert and move the water stop valve body 2 located in the storage space S2 into the pipe through the cut-out valve insertion port 3 to move the water stop valve. The valve insertion port 3 is sealed by the body 2 and at the same time, the flow path in the fluid transport pipe A is shut off.

[Second Embodiment] In the valve mounting device for a fluid transport pipe shown in FIG. 11, a driving means J for driving and rotating a housing C with respect to the guide support portion B is detachably provided. The driving means J includes one support body B
Attach the mounting bracket 3 to the first connecting flange 5e on one side.
7 is removably mounted with bolts 36. The mounting bracket 37 has an electric motor 38, which is an example of a driving unit, which can be driven forward and reverse, and a reduction gear mechanism 39A interlocked with the electric motor 38. A drive gear 39B is mounted on the outer peripheral surface of the semi-cylindrical cover body 11A of the second split housing C2. A drive gear 41 that meshes with the drive gear 40 is fixed.

According to the second embodiment, the rotation operation of the housing C at the time of cutting the valve insertion port 3 can be easily performed by using the driving force of the driving means J, and the valve insertion port 3 can be easily rotated. After cutting is formed, or after the water blocking valve body 2 is inserted into the fluid transport pipe A through the valve insertion port 3, the driving means J can be freely removed. It can be diverted to a valve mounting device. Since other configurations are the same as those described in the first embodiment, the same components are denoted by the same reference numerals as those in the first embodiment, and description thereof will be omitted.

[Third Embodiment] In the fluid transport pipe valve mounting apparatus shown in FIGS. 12 and 13, a valve of a fluid transport pipe A is provided at the base end side of an end mill 15 which is an example of a rotary cutting tool of the cutting means D. An annular concave curved blade portion 15a is formed for chamfering the outer peripheral surface side edge of the insertion opening 3 into a round shape.

In the case of this embodiment, when the end mill 15 cuts the valve insertion opening 3, the outer periphery of the valve insertion opening 3 of the fluid transport pipe A is formed by the blade portion 15 a formed on the end mill 15. Since the surface side periphery can be chamfered by a series of operations, the water stopping valve body 2 comes into contact with the sharp outer periphery side periphery of the cut and formed valve insertion port 3 while reducing the number of machining steps. Damage due to the above can be suppressed. Since other configurations are the same as those described in the first embodiment, the same components are denoted by the same reference numerals as those in the first embodiment, and description thereof will be omitted.

[Fourth Embodiment] In the valve mounting device for a fluid transport pipe shown in FIG. 14, cutting chips are passed through the cutting means D through the flow path 42 formed in the end mill 15 which is an example of a rotary cutting tool, and the chips are removed from the housing C. A cutting chip discharging means K for discharging is provided.

The chip discharge means K forms a series of discharge passages 42 in the center of the end mill 15 and the cutting drive shaft 32 extending between the working space S1 in the housing C and the outside of the housing C. The discharge hose 43 connected to the discharge passage 42 on the cutting drive shaft 32 side is provided with a valve 44 that can be freely opened and closed in the middle of the discharge hose 43.

In the case of this embodiment, the cutting chips generated by the cutting by the end mill 15 of the cutting means D are passed through the discharge passage 42 formed by using the end mill 15 located at the source of the cutting chips. C can be discharged to the outside, so that not only can cutting chips be efficiently discharged to the outside, but also, for example, the cutting means D
The mounting device can be made more compact and the structure can be simplified as compared with the case where the paper is discharged outside through a place other than the above.
Since other configurations are the same as those described in the first embodiment, the same components are denoted by the same reference numerals as those in the first embodiment, and description thereof will be omitted.

[Fifth Embodiment] In the fluid transport pipe valve mounting device shown in FIG. 15, the water stopping valve body 2 can be stored in the housing C at a position separated from the outer peripheral surface of the fluid transport pipe A. A space S2 is formed, and a diaphragm 45 that defines the storage space S2 and the work space S1 is provided in the housing C in a state where the diaphragm 45 can be broken as the water stop valve body 2 is inserted into the pipe and moved. ing.

In the case of this embodiment, the fluid transport pipe A
Until the cutting of the valve insertion port 3 formed in
Since the storage space S2 for accommodating the water stopping valve element 2 and the working space S1 can be reliably shut off by the diaphragm 45, the cutting waste generated by the cutting by the cutting means D is used as the water stopping valve. Adhesion to the body 2 can be suppressed, and the desired water stopping function of the water stopping valve body 2 can be reliably exhibited.

However, when the valve operating means E is operated to insert and move the water stopping valve body 2 from the pipe diameter direction through the cut-out valve insertion port 3, the water stopping valve body 2 is inserted. Since the diaphragm 45 can be broken along with the movement, no special operation for breaking the diaphragm 45 is required, and the operation can be simplified and the efficiency can be improved. Since other configurations are the same as those described in the first embodiment, the same components are denoted by the same reference numerals as those in the first embodiment, and description thereof will be omitted.

[Sixth Embodiment] In the fluid transport pipe valve mounting apparatus shown in FIG.
A swing support means L for swingably supporting the casing 31 of the cutting means D in a three-dimensional direction is provided for the work valve 17 detachably attached to the attachment portion 16 or the second attachment portion 21. As shown in FIGS. 17 (a) and 17 (b), the end mill 15 which is an example of the rotary cutting tool of the cutting means D is rocked to chamfer the inner peripheral side edge of the valve insertion port 3 of the fluid transport pipe A. It is configured so that it can be processed.

The rocking support means L has a partially spherical inner peripheral surface 4 formed in a part of the inner peripheral surface thereof in a mounting cylinder 46 which is detachably mounted to the working valve 17 via bolts or the like.
Partial spherical outer surface 47a that slides freely along 6a
Is fitted and connected, and a bolt 48 is screwed into the mounting cylinder 46 to prevent the fitted and connected movable cylinder 47 from moving out.
A female screw 47b formed on the inner peripheral surface of the movable cylindrical body 47 is formed by screw-connecting a connecting cylindrical body 49 flange-connected to the casing 31 of the cutting means D.

When the axis of the movable cylinder 47 and the axis of the mounting cylinder 46 coincide with each other, the outer peripheral surface of the movable cylinder 47 engages with a bolt 48 to be screwed. Recess 4
7c, the engaging recess 47c and the bolt 48 are formed.
Thus, a fixing means for fixing the movable tubular body 47 and the mounting tubular body 46 in a state where their axes coincide with each other is formed. Since other configurations are the same as those described in the first embodiment, the same components are denoted by the same reference numerals as those in the first embodiment, and description thereof will be omitted.

[Seventh Embodiment] In the valve mounting device for a fluid transport pipe shown in FIG. 18, the pipe of the semi-cylindrical cover body 10 of the first split housing C1 is provided on the rotation guide surface 5A of both supports B1 and B2. The half-cylinder of the first split housing C1 is fitted to both ends in the axial direction and both ends of the semi-cylindrical cover body 11A of the second split housing C2 in the pipe axis X direction from the X-axis direction. A regulating body 5B for preventing the semi-cylindrical cover body 11A of the second cover C10 and the semi-cylindrical cover body 11 of the second divided housing C2 from moving outward in the pipe diameter direction is integrally formed. Note that the other configuration is the same as the configuration described in the first embodiment.
The same reference numerals as those of the embodiment are appended, and the description thereof is omitted.

[Other Embodiments] (1) As the cutting means D, those having various structures are conventionally sold, and the fluid transport pipe is rotated as the housing C rotates around the pipe axis X. Any structure may be used as long as the valve insertion port 3 can be cut and formed in the tube wall 1 of A. (2) In each of the above embodiments, each of the support members B
A rotation guide portion 5A for slidingly guiding the housing C around the pipe axis X of the fluid transport pipe A on the outer peripheral surface of the first and second B2.
Although the rotation guide surface is formed as an example, the rotation guide portion 5A is not limited to the one that comes into surface contact with the entire peripheral surface, and the rotation guide portion 5A is in the pipe circumferential direction or the pipe axis direction with respect to the housing C. Alternatively, surface contact, line contact, or point contact may be intermittent in both directions. (3) In each of the above-described embodiments, of the semi-cylindrical cover body 11A of the second divided housing C2, the same circumference different from the first mounting portion 16 of the cutting means D in the pipe circumferential direction (circumferential direction). At a position on the line and at a symmetric position about the operation axis of the valve operation means E with respect to the first mounting portion 16 as a center of symmetry,
Although the second mounting portion 21 for internal work to which the cutting means D can be mounted via the work valve 17 which can be opened and closed freely is formed, the formation position of the second mounting portion 21 is set with respect to the first mounting portion 16. The cutting means D does not need to be located at a symmetrical position about the axis of operation of the valve operating means E, and is on or near the same circumferential line different from the first mounting portion 16 of the cutting means D in the pipe circumferential direction (circumferential direction). And the second mounting portion 21
May be formed at a portion different from the first mounting portion 16 in the tube axis direction. In this case, at least the second mounting portion 21
And the first mounting portion 16 only by the deviation dimension in the tube axis direction,
The housing C is configured to be slidably movable in the tube axis direction with respect to the guide support portion B. Also, a total of three or more first mounting portions 16 and second mounting portions 21 may be formed. (4) In each of the above embodiments, the housing C is divided into two parts so as to be fixedly connectable in the circumferential direction of the tube. Good.

[Brief description of the drawings]

FIG. 1 is an overall sectional side view showing a first embodiment of a fluid transport pipe valve mounting device of the present invention.

FIG. 2 is a sectional front view of the whole.

FIG. 3 is an overall side view.

FIG. 4 is an exploded perspective view.

FIG. 5 is an enlarged sectional view of a cutting means.

FIG. 6 is a sectional side view when the housing is rotated.

FIG. 7 is a sectional front view of the whole when the water shutoff valve body is closed.

FIG. 8 is a cross-sectional side view of the whole when the water shutoff valve body is closed.

FIG. 9 is an enlarged sectional view of a main part when a confirmation window is attached.

FIG. 10 is an enlarged sectional view of a main part when an endoscope is attached.

FIG. 11 is an overall sectional front view showing a second embodiment of the fluid transport pipe valve mounting device of the present invention.

FIG. 12 is a sectional side view of a main part showing a third embodiment of the fluid transport pipe valve mounting device of the present invention.

FIG. 13 is a cross-sectional front view of a main part when a water shutoff valve is closed.

FIG. 14 is a sectional side view of a main part showing a fourth embodiment of the fluid transport pipe valve mounting device of the present invention.

FIG. 15 is a sectional side view of a main part showing a fifth embodiment of the fluid transport pipe valve mounting device of the present invention.

FIG. 16 is a sectional side view of a main part showing a sixth embodiment of the fluid transport pipe valve mounting device of the present invention.

17A is a cross-sectional side view of the main part when the water stopping valve is in the open position, and FIG. 17B is a cross-sectional side view of the main part when the water stopping valve is closed.

FIG. 18 is a sectional front view of a main part showing a seventh embodiment of the fluid transport pipe valve mounting device of the present invention.

FIG. 19 is a sectional side view showing a conventional fluid transport pipe valve mounting device.

FIG. 20 is a cross-sectional front view showing a conventional fluid transport pipe valve mounting device.

[Explanation of symbols]

 Reference Signs List A fluid transport pipe B guide support part C housing D cutting means E valve operating means F rotation angle regulating means J driving means S1 working space X pipe shaft 1 pipe wall 2 water stop valve 3 valve insertion port 15 rotary cutting tool (End mill) 16 Mounting part (first mounting part) 21 Internal working mounting part (second mounting part) 34 Feeding means 35 Driving means

Claims (8)

[Claims] 1. A housing defining a working space sealed on the outer peripheral surface side of a portion of a fluid transport pipe where a valve insertion port for inserting a water stop valve from the outside in the pipe radial direction is formed. Is rotatably held around the pipe axis of the fluid transport pipe, and a valve insertion port is cut in the pipe wall of the fluid transport pipe as the housing is rotated around the pipe axis. A fluid transport pipe valve mounting apparatus, comprising: a cutting means to be formed; and a valve operating means for inserting and moving a water stop valve element from a pipe diameter direction through a cut and formed valve insertion port. A valve mounting device for a fluid transport pipe, wherein a mounting portion for internal working is formed in a portion different from a mounting portion of the cutting means. 2. The mounting part for internal working is formed at a position deviated in a pipe circumferential direction with respect to a mounting part of a cutting means,
2. The apparatus according to claim 1, wherein said cutting means can be mounted.
The valve mounting device for a fluid transport pipe according to the above. 3. The valve mounting device for a fluid transport pipe according to claim 2, wherein the mounting portion of the cutting means and the mounting portion for internal working are arranged at positions symmetrical with respect to the valve operating means. 4. The housing is composed of a plurality of divided housings which are divided so as to be freely connectable in a circumferential direction of the pipe. 4. The valve mounting device for a fluid transport pipe according to claim 1, wherein a storage portion for housing at a position separated from a surface, and a mounting portion for the cutting means and a mounting portion for internal working are formed. 5. The cutting means includes a rotary cutting tool for cutting and forming a valve insertion port as the pipe is rotated in a circumferential direction, a feeding means for moving the rotary cutting tool in a pipe radial direction, and a rotating tool. The valve mounting device for a fluid transport pipe according to any one of claims 1 to 4, further comprising a driving unit configured to drive and rotate the cutting tool. 6. The fluid transport pipe is rotatably held around a pipe axis with respect to a guide support portion which is fixed to a portion of the fluid transport pipe excluding a portion where a valve insertion port is formed, in a jacket state. The valve mounting device for a fluid transport pipe according to any one of claims 1 to 5, wherein 7. The valve mounting device for a fluid transport pipe according to claim 6, wherein driving means for driving and rotating the housing with respect to the guide support portion is provided detachably. 8. A rotation angle restricting means for restricting a maximum rotation angle of the housing with respect to the guide support portion to an angle formed by cutting around a pipe axis of the valve insertion port. Valve mounting device for fluid transport pipes.