JP2013078834A - Drilling equipment for fluid pipe and mating flange for use in the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce equipment costs, to facilitate drilling work, and to improve efficiency.SOLUTION: In a mating flange 40 of a drilling device C, a fourth coupling flange 40A capable of being selectively coupled, from a branching axial core X direction, to a first coupling flange 16 formed at a first hub part 15 of a first gate valve device B1, a second coupling flange formed at a second hub part of a second gate valve device, and a third coupling flange formed at a straight tubular connection port part of a third gate valve device is formed, and a tubular part which can selectively enter, from the branching axial core X direction, a taper inner circumferential surface 15b for packing mounting of the first hub part 15 and a taper inner circumferential surface for packing mounting of the second hub part and which has an end surface facing an end surface of the straight tubular connection port part in the branching axial core X direction is formed. A packing 43 selectively abutting the taper inner circumferential surface 15b of the first hub part 15, the taper inner circumferential surface of the second hub part, and the end surface of the straight tubular connection port part to achieve water tightness is provided at the tubular part of the mating flange 40.

Description

  The present invention relates to a gate valve device in which a gate valve is provided between a connection port portion connected to a branch port portion of a T-shaped joint that can be attached to a fluid pipe such as a water pipe and a port portion to which the branch pipe is connected. On the other hand, the present invention relates to a fluid pipe drilling facility in which a joint flange of a drilling device for forming a through hole in a pipe wall of a fluid pipe is configured to be connectable in a watertight state and a joint flange used therefor.

  As a gate valve device used for this kind of fluid pipe drilling equipment, a first connection port portion to which a branch port portion of a T-shaped joint that can be attached to a fluid pipe is connected and a first receiving port portion to which the branch pipe is connected. Between the first gate valve device provided with a gate valve between the second connection port portion to which the branch port portion of the T-shaped joint is connected and the second port portion to which the branch pipe is connected. A second sluice valve device having a ring mounting groove in which a sluice valve and a lock ring are mounted, and a straight tube in which a branch pipe is connected to a third connection port to which the branch port of the T-shaped joint is connected. There are three types, a third gate valve device provided with a gate valve between the connection port portion, and a gate valve device suitable for construction conditions such as a separation prevention function and price is selected.

  The inner peripheral surface of the first receiving port portion of the first gate valve device and the inner peripheral surface of the second receiving port portion of the second gate valve device are each formed with a tapered inner peripheral surface for packing mounting. A branch pipe provided with an annular locking projection that can be engaged with the lock ring is inserted into the second receiving part of the second gate valve device. The connection dimension in the diameter direction of the bolts that connect each other is slightly larger in the second gate valve device than in the first gate valve device.

  Further, in the third gate valve device, since there is no receiving portion having a tapered inner peripheral surface unlike the first and second gate valve devices, the same call as the first and second gate valve devices. Even in the diameter, the inner diameter on the opening side of the straight tubular connection port portion is slightly smaller than that of the first and second gate valve devices, and the shape is also different.

  Therefore, conventionally, when connecting a piercing device to the first to third gate valve devices, the port structure of the first port portion of the first gate valve device, the second port portion of the second gate valve device. The flanges having shapes corresponding to the receiving port structure and the structure of the straight tubular connection port portion of the third gate valve device are manufactured and used separately (see, for example, Patent Documents 1 to 3).

JP 09-047910 A JP 2000-028058 A JP 2005-326025 A

  In the conventional perforating equipment for fluid pipes, three pipes having shapes corresponding to the first receiving port portion of the first gate valve device, the second receiving port portion of the second gate valve device, and the straight tubular connection port portion of the third gate valve device, respectively. Since it is necessary to manufacture different types of joint flanges, and it is necessary to use them according to the type of gate valve device, there is a disadvantage in that the drilling equipment for fluid pipes rises and the drilling work becomes complicated.

  The present invention has been made in view of the above circumstances, and its main problems are a drilling facility for a fluid pipe capable of reducing the cost of equipment, facilitating and improving the efficiency of drilling work, and the present invention. The point is to provide a flange.

A first characteristic configuration according to the present invention is a gate valve between a first connection port portion to which a branch port portion of a T-shaped joint that can be attached to a fluid pipe is connected and a first receiving port portion to which the branch pipe is connected. A gate valve and a lock ring between a first connection valve portion connected to a branch port portion of the T-shaped joint and a second receiving port portion connected to a branch pipe Between the second gate valve device provided with a ring mounting groove to which the pipe is mounted and the third connection port portion to which the branch port portion of the T-shaped joint is connected and the straight tubular connection port portion to which the branch pipe is connected And a third sluice valve device provided with a sluice valve in a fluid which is configured so that a joint flange of a piercing device for forming a through hole in the pipe wall of the fluid pipe can be selectively connected in a watertight state. A pipe drilling facility,
The mating flange includes a first connection flange formed at the first receiving port or a second connection flange formed at the second receiving port and a third connection flange formed at the straight tubular connection port. A fourth connecting flange that can be alternatively connected to the branch axis from the direction of the branch axis, a tapered inner peripheral surface for mounting the packing of the first receiving port, or a packing mounting of the second receiving port A cylindrical portion that can enter the tapered inner peripheral surface from the branch axis direction and has an end surface facing the branch axis direction on the end surface of the straight tubular connection port portion is formed. The tubular portion of the joint flange is selected with respect to the tapered inner peripheral surface of the first receiving portion or the tapered inner peripheral surface of the second receiving portion and the end surface of the straight tubular connecting port portion. The point of this is that a packing is provided that makes contact with each other and makes it watertight.

  According to the said structure, when connecting the joint flange of a piercing | piercing apparatus to a 1st port part of a 1st gate valve apparatus or a 2nd port part of a 2nd gate valve apparatus in a watertight state, this 1st port part's When the second connecting flange of the first connecting flange or the second receiving portion and the fourth connecting flange of the fitting flange are connected from the branch axis direction, the cylindrical portion of the fitting flange is attached to the packing of the first receiving portion. Into the taper-shaped inner peripheral surface or the taper-shaped inner peripheral surface for mounting the packing of the second receiving portion from the direction of the branch axis, and the packing provided on the cylindrical portion is the tapered shape of the first receiving portion. The inner peripheral surface or the tapered inner peripheral surface of the second receiving portion is pressed against each other, and the first receiving portion or the second receiving portion and the fitting flange are securely connected in a watertight state.

  Moreover, when connecting the joint flange of a piercing | piercing apparatus to the straight tubular connection port part of a 3rd gate valve apparatus in a watertight state, the 3rd connection flange of this straight tubular connection port part and the 4th connection flange of a joint flange are connected. When connected from the branch axis direction, the end surface of the cylindrical portion of the joint flange is moved close to the end surface of the straight tubular connection port portion from the branch axis direction, and the packing provided on this cylindrical portion is the tube of the joint flange. The straight tubular connection port portion and the joint flange are securely connected in a watertight state by being pressed against the end face of the shape portion.

  Therefore, it is possible to share the joint flange for the first receiving port portion of the first gate valve device or the second receiving port portion of the second gate valve device and the straight tubular connection port portion of the third gate valve device. Therefore, the equipment cost can be reduced, the drilling work can be facilitated, and the efficiency can be improved.

A second characteristic configuration according to the present invention is a gate valve between a first connection port portion to which a branch port portion of a T-shaped joint that can be attached to a fluid pipe is connected and a first reception port portion to which the branch pipe is connected. A gate valve and a lock ring are provided between the first gate valve device provided with the second connection port portion to which the branch port portion of the T-shaped joint is connected and the second port portion to which the branch pipe is connected. Between the second gate valve device provided with the ring mounting groove to be mounted, and the third connection port portion to which the branch port portion of the T-shaped joint is connected and the straight tubular connection port portion to which the branch pipe is connected. A fluid configured such that a joint flange of a perforation device that forms a through hole in the pipe wall of the fluid pipe can be selectively connected to a third gate valve device provided with a gate valve in a watertight state. A pipe drilling facility,
The joint flange includes a first connection flange formed at the first receiving port, a second connection flange formed at the second receiving port, and a third connection flange formed at the straight tubular connection port. A fourth connecting flange that can be selectively connected to the branch axis direction, a tapered inner peripheral surface for mounting the packing of the first receiving port, and a packing mounting for the second receiving port. A cylindrical portion is formed which can be selectively inserted into the tapered inner peripheral surface from the branch axis direction and has an end surface facing the branch tube axis direction on the end surface of the straight tubular connection port portion. In addition, the cylindrical portion of the joint flange includes a tapered inner peripheral surface of the first receiving portion, a tapered inner peripheral surface of the second receiving portion, and an end surface of the straight tubular connection opening portion. However, there is provided a packing which is selectively brought into contact with water and is watertight.

  According to the above configuration, when the fitting flange of the perforating device is connected to the first receiving portion of the first gate valve device in a watertight state, the first connecting flange of the first receiving portion and the fourth connecting flange of the fitting flange. Are connected from the branch axis direction, and the cylindrical portion of the joint flange enters from the branch axis direction into the tapered inner peripheral surface for mounting the packing of the first receiving portion, and is provided in this cylindrical portion. A packing is press-contacted to the taper-shaped inner peripheral surface of a 1st receiving part, and a 1st receiving part and a joint flange can be connected reliably in a watertight state.

  When the fitting flange of the punching device is connected to the second receiving port of the second gate valve device in a watertight state, the second connecting flange of the second receiving port and the fourth connecting flange of the fitting flange are connected to the branch shaft. When connected from the core direction, the cylindrical portion of the joint flange enters the tapered inner peripheral surface for mounting the packing of the second receiving portion from the branch axis direction, and the packing provided on this cylindrical portion is the second. The second receiving part and the joint flange are securely connected in a watertight state by being pressed against the tapered inner peripheral surface of the receiving part.

  Even if there is a difference in the dimensions of the tapered inner peripheral surface of the first receiving portion and the tapered inner peripheral surface of the second receiving portion having the same nominal diameter, the cylindrical portion of the fitting flange is the tapered inner peripheral surface. On the other hand, the packing provided in the cylindrical portion can be strongly pressed against the wide portion of the tapered inner peripheral surface by the wedge effect by entering from the branch axis direction.

  When the joint flange of the drilling device is connected to the straight tubular connection port of the third gate valve device in a watertight state, the third connection flange of the straight tubular connection port and the fourth connection flange of the joint flange are connected to the branch shaft. When connected from the core direction, the end face of the tubular portion of the joint flange comes close to the end face of the straight tubular connection port portion while facing the branch axis direction, and the packing provided on the cylindrical portion is close to the end surface of the straight tubular connection port portion. It is press-contacted, and a straight tubular connection port part and a joint flange are reliably connected in a watertight state.

  Therefore, it is possible to share the joint flange for the first receiving port portion of the first gate valve device, the second receiving port portion of the second gate valve device, and the straight tubular connection port portion of the third gate valve device. Therefore, the equipment cost can be reduced, the drilling work can be facilitated, and the efficiency can be improved.

  According to a third characteristic configuration of the present invention, an annular fitting mounting portion on which a radially inner side end portion of the packing is fitted and mounted is formed on the end surface of the cylindrical portion of the joint flange. The end portion on the radially outer side of the packing lies in a point extending at a boundary portion between the outer peripheral surface of the cylindrical portion and the connection surface of the fourth connection flange or in the vicinity thereof.

  According to the above configuration, the packing fitted and attached to the end surface of the cylindrical portion of the joint flange extends through the outer peripheral surface of the cylindrical portion to the boundary portion with the connection surface of the fourth connection flange or to the vicinity thereof. Therefore, the wide outer peripheral surface side of the packing located on the outer peripheral surface side of the cylindrical portion is effectively pressed against the tapered inner peripheral surface of the first receiving portion or the tapered inner peripheral surface of the second receiving portion. Can be made.

  According to a fourth feature of the present invention, the outer peripheral surface of the cylindrical portion of the joint flange has a gradient of the tapered inner peripheral surface of the first receiving portion or the tapered inner peripheral surface of the second receiving portion. It is in the point formed in the cyclic | annular inclined surface which follows or substantially follows.

  According to the said structure, when connecting the joint flange of a piercing | piercing apparatus to a 1st port part of a 1st gate valve apparatus or a 2nd port part of a 2nd gate valve apparatus in a watertight state, this 1st port part's When the first connecting flange or the second connecting flange of the second receiving portion and the fourth connecting flange of the fitting flange are connected from the direction of the branch axis, the cylindrical portion of the fitting flange is used for mounting the packing of the first receiving portion. The tapered inner peripheral surface or the tapered inner peripheral surface for mounting the packing of the second receiving portion enters from the branch axis direction.

  At this time, the outer peripheral surface of the cylindrical portion of the joint flange is an annular inclined surface having a gradient that is parallel or substantially parallel to the tapered inner peripheral surface of the first receiving portion or the tapered inner peripheral surface of the second receiving portion. Since it is formed, the packing provided in the cylindrical portion can be effectively brought into pressure contact with the tapered inner peripheral surface of the first receiving port portion or the tapered inner peripheral surface of the second receiving port portion.

  According to a fifth characteristic configuration of the present invention, the seal portion that contacts the tapered inner peripheral surface of the first receiving port portion or the tapered inner peripheral surface of the second receiving port portion of the packing has a fourth connection. The connection surface side of the flange is thinner.

  According to the above configuration, when the first connecting flange of the first receiving portion or the second connecting flange of the second receiving portion and the fourth connecting flange of the mating flange are connected from the branch axis direction, this connecting operation is performed. Therefore, it is possible to suppress a part of the packing that is compressed as it enters between the connecting surfaces of both connecting flanges.

  According to a sixth characteristic configuration of the present invention, in the packing, the outer surface of the seal portion that comes into contact with the end surface of the straight tubular connection port portion has a straight tubular connection port portion in the branch axis direction toward the radial center. It exists in the point formed in the arcuate surface which protrudes to an end surface side.

  According to the said structure, when connecting the 3rd connection flange of the straight tubular connection port part of a 3rd gate valve apparatus, and the 4th connection flange of a joint flange, a straight tube is carried out by tolerances, such as a straight pipe connection port part and a joint flange. Even when the contact position of the packing with respect to the end face of the connection port portion is displaced in the diametrical direction, a predetermined watertight state can be maintained between the straight tubular connection port portion and the joint flange.

  According to a seventh characteristic configuration of the present invention, the protruding length of the tubular portion of the joint flange in the branch axis direction is such that the tapered inner peripheral surface of the first receiving portion or the tapered shape of the second receiving portion. It is in the point comprised smaller than the length in the direction of a branch axis of a shape inner peripheral surface.

  According to the said structure, the sealing effect with respect to the taper-shaped inner peripheral surface of a 1st port part or the taper-shaped inner surface of a 2nd port part and the sealing effect with respect to the end surface of a straight tubular connection port part are each demonstrated reliably and favorably. Can be made.

  An eighth characteristic configuration according to the present invention is a joint flange used for the fluid pipe drilling facility according to any one of the first to seventh characteristic configurations, and the one end side portion in the branch axis direction includes: The fourth connecting flange and the cylindrical portion are formed, and a fifth connecting flange that can be connected to the punching device is formed at the other end side portion in the branch axis direction.

  According to the above configuration, the first receiving port portion of the first gate valve device or the second receiving port portion of the second gate valve device and the straight tubular connection port portion of the third gate valve device are alternatively connected. It is possible to provide a useful joint flange capable of achieving a reduction in equipment cost, facilitation of drilling work, and efficiency by sharing by forming a possible fourth connecting flange and a cylindrical portion. it can.

The side view of the partial cross section when showing the 1st Embodiment of this invention and connecting the joint flange of a piercing | piercing apparatus to the 1st gate valve apparatus Expanded sectional view of the first gate valve device and the joint flange An enlarged cross-sectional view (a) before connection of the first connection flange of the first receiving port and the fourth connection flange of the mating flange, and an enlarged cross-sectional view (b) at the time of connection. Enlarged cross-sectional view of the second gate valve device connected to the flange of the punching device An enlarged cross-sectional view (a) before connection between the second connection flange of the second receiving portion and the fourth connection flange of the mating flange, and an enlarged cross-sectional view at the time of connection (b) Enlarged cross-sectional view when connecting the flange of the punching device to the third gate valve device An enlarged cross-sectional view (a) before connection of the third connection flange of the straight tubular connection port portion and the fourth connection flange of the mating flange, and an enlarged cross-sectional view at the time of connection (b) Exploded sectional view of mating flange and packing Sectional view when a branch pipe is connected to the first gate valve device Side view when a branch pipe is connected to the first gate valve device Sectional view when a branch pipe is connected to the second gate valve device Side view when a branch pipe is connected to the second gate valve device Sectional view when a branch pipe is connected to the third gate valve device Side view when a branch pipe is connected to the third gate valve device The expanded sectional view of the important section showing a 2nd embodiment of the present invention. The expanded sectional view of the important section showing a 3rd embodiment of the present invention. The expanded sectional view of the principal part which shows 4th Embodiment of this invention.

[First Embodiment]
In the fluid pipe drilling equipment shown in FIGS. 1 to 14, a split structure T-joint that is an example of a split structure is provided in a setting branch mounting region including a through-hole forming portion of a cast pipe 1 made of cast iron pipe. T-tube A is mounted in a watertight state.

As shown in FIG. 1 and FIG. 2, the first connection port portion 14 to which the branch port portion 6 is connected and the first branch tube P <b> 1 are connected to the branch port portion 6 of the split T-shaped tube A. The first gate valve device B1 of the K-shaped receiving type in which the first gate valve 12 is provided between the first port portion 15 and the branch port portion 6 of the split T-shaped pipe A as shown in FIG. A ring mounting groove 25c in which the second gate valve 22 and the lock ring 26 are mounted is provided between the second connection port 24 to which the second branch pipe P2 is connected and the second receiving port 25 to which the second branch pipe P2 is connected. As shown in FIG. 6, there is a SII type inlet type second gate valve device B2, and a third connecting port portion 34 and a third branch tube P3 to which the branch port portion 6 of the split T-shaped tube A is connected. A flange type third gate valve device B3 provided with a third gate valve 32 between the pipe and the straight pipe connection port 35 is alternatively connectable. It has been.

  Furthermore, with respect to said 1st gate valve apparatus B1, 2nd gate valve apparatus B2, and 3rd gate valve apparatus B3, the flow of the clean water (fluid) by the said water pipe 1 to the pipe wall 1A of the water pipe 1 is carried out. The joint flange 40 of the drilling device C that forms the branch through-hole 2 in the maintained water-free state is configured to be selectively connectable in a watertight state.

  As shown in FIG. 1, a split T-shaped pipe A shared by the fluid pipe drilling facility is a partially cylindrical split joint that is divided into three in the pipe circumferential direction that can be sheathed from the pipe radial direction to the water pipe 1. A plurality of split joint bodies 3 are examples of the first fastening means 4, which are composed of the body 3, and adjacent end portions of the split joint body 3 sheathed on the water pipe 1 are disposed at both ends in the pipe circumferential direction of each split joint body 3. A connecting flange portion 3a for detachably fixing and connecting via the bolts 4A and nuts 4B is integrally formed.

  The seal holding groove 3b formed on the inner surface of each split joint body 3 is fitted with a synthetic rubber sealing material 5 that seals the space between the outer peripheral surface of the water pipe 1 in a watertight state, A cylindrical branch port portion 6 having an inner diameter larger than the diameter of the through hole 2 is integrally formed in the center portion of one split joint body 3 so as to protrude along the branch axis X direction. Yes.

  At the distal end of the branch port 6, the first connection port 14 of the first gate valve device B1, the second connection port 24 of the second gate valve device B2, and the third connection port of the third gate valve device B3. A fitting receiving portion 6A is formed in which the portion 34 is selectively fitted and connected from the branch axis X direction.

  At the end of the outer peripheral surface of the fitting receiving portion 6A of the branch port portion 6, a connecting piece 17 provided in the first valve case portion 13 of the first gate valve device B1 or the second gate of the second gate valve device B2 is provided. A plurality of bolts 8A, which are an example of the second fastening means 8, with respect to the connecting piece 28 provided on the valve case portion 23 or the connecting piece 37 provided on the third valve case portion 33 of the third gate valve device B3. A connecting flange 7 is integrally formed so as to be detachably fixed via a nut 8B.

  As shown in FIGS. 1 to 3, the K-type receiving-type first gate valve device B <b> 1 is provided with a first gate valve 12 that is opened and closed by rotating the first valve operating shaft 11. A cylindrical first connection port portion 14 connected to the branch port portion 6 of the split T-tube A and a first branch tube P1 are connected to the upstream side portion and the downstream side portion of the one-valve case portion 13. A first receiving portion 15 is integrally formed on the branch axis X in a concentric state.

  A first packing for sealing the space between the outer peripheral surface of the first branch pipe P1 inserted and connected to the first receiving port 15 at the opening side portion of the inner peripheral surface 15a of the first receiving port 15. A tapered inner peripheral surface 15b having a larger diameter on the opening side where 55 (see FIG. 9) is attached is formed.

  At the end of the outer peripheral surface of the first receiving port 15, a fourth connecting flange 40 </ b> A (see FIG. 1) formed on the upstream side portion of the joint flange 40 of the drilling device C and the first branch pipe after drilling work A first coupling flange 16 that can be alternatively fixedly coupled to a first pusher wheel 56 (see FIG. 9) that is externally mounted on P1 is integrally formed.

  The first sealing member 18 such as an O-ring is compressed between the distal end corner portion of the outer peripheral surface of the first connection port portion 14 and the inner corner portion in the fitting receiving portion 6A of the branch port portion 6. An annular inclined surface 14a is formed.

As shown in FIGS. 4 and 5, the SII-type receiving-type second gate valve device B <b> 2 is provided with a second gate valve 22 that is opened and closed by rotating the second valve operating shaft 21. A cylindrical second connection port portion 24 connected to the branch port portion 6 of the split T-shaped tube A and a second branch tube P2 are connected to the upstream portion and the downstream portion of the two-valve case portion 23. The second receiving portion 25 having a shape is integrally formed on the branch axis X in a concentric state.

  The second packing 58 for sealing the space between the outer peripheral surface of the second branch pipe P2 inserted and connected to the second receiving port 25 at the opening side portion of the inner peripheral surface 25a of the second receiving port 25. A tapered inner peripheral surface 25b having a larger diameter toward the opening side on which (see FIG. 11) is mounted is formed.

  On the back side of the inner peripheral surface 25b of the inner peripheral surface 25a of the second receiving portion 25, there is substantially C which can be elastically deformed to the reduced diameter side and the enlarged diameter side where one circumferential direction is cut. A ring mounting groove 25c in which a U-shaped lock ring 26 is mounted is formed.

  At the end of the outer peripheral surface of the second receiving portion 25, there is a fourth connecting flange 40A (see FIG. 4) formed at the upstream side portion of the joint flange 40 of the punching device C and the second branch pipe after the punching operation. A second connection flange 27 that can be alternatively fixedly connected to the second pusher wheel 59 (see FIG. 11) that is externally mounted on P2 is integrally formed.

  The second sealing material 29 such as an O-ring is compressed between the distal end corner of the outer peripheral surface of the second connection port 24 and the inner corner of the fitting port 6A of the branch port 6. An annular inclined surface 24a is formed.

  The lock ring 26 is set to an outer diameter larger than the inner diameter of the inner peripheral surface 25a of the second receiving portion 25 in a natural state, and the ring is mounted on the inner peripheral surface 25a of the second receiving portion 25. An annular locking projection 45 that is set to an inner diameter that is smaller than the inner diameter of the upstream vicinity portion 25d of the groove 25c, and is formed to protrude from the distal end portion of the outer peripheral surface of the second branch pipe P2, and the branch axis X direction The inner diameter is set so as to prevent the relative separation movement of the second receiving port 25 of the second gate valve device B2 and the second branch pipe P2.

  Further, the lock ring 26 has an inner diameter that allows passage of the annular locking projection 45 of the second branch pipe P2, that is, by widening the distance between both ends thereof with an expansion / contraction diameter operation jig having a well-known structure (not shown). Further, it is configured such that the diameter can be increased to the unlocked state where the inner diameter is larger than the outer diameter of the annular locking protrusion 45.

  Further, by narrowing the distance between both ends of the lock ring 26 with an expansion / contraction diameter operation jig, the second receiving port is formed in a state where the downstream side of the ring mounting groove 25c (the opening side of the second receiving port 25) is partitioned. The diameter of the ring 25 can be reduced to a ring attachment / detachment operation state having an outer diameter smaller than the inner diameter of the annular partition wall 25e projecting from the inner peripheral surface 25a of the portion 25.

At the downstream corner of the inner peripheral surface of the lock ring 26, the outer cam surface 45a for diameter expansion operation formed at the upstream corner of the annular locking projection 45 of the second branch pipe P2 shown in FIG. And an inner cam surface 26a for diameter expansion guidance that abuts from the direction of the branch axis X.

  As shown in FIGS. 6 and 7, the flange-type third gate valve device B <b> 3 has a third valve case provided with a third gate valve 32 that is opened and closed by a rotation operation of the third valve operating shaft 31. A cylindrical third connection port portion 34 and a cylindrical straight tubular connection port portion 35 are integrally formed on the branch axis X in a concentric state at the upstream portion and the downstream portion of the portion 33.

  At the end portion of the outer peripheral surface of the straight tubular connection port portion 35, it is formed at the end portion of the fourth connecting flange 40 </ b> A (see FIG. 6) and the third branch pipe P <b> 3 in the upstream portion of the joint flange 40 of the punching device C. A third connection flange 36 that is alternatively fixedly connectable to the seventh connection flange 61 (see FIG. 13) is integrally formed.

  A third seal member 38 such as an O-ring is compressed between the outer peripheral surface of the third connection port portion 34 and the inner side corner portion in the fitting receiving portion 6A of the branch port portion 6. An annular inclined surface 34a is formed.

  The joint flange 40 is connected to each of the first receiving port 15 of the first gate valve device B1, the second receiving port 25 of the second gate valve device B2, or the straight tubular connection port 35 of the third gate valve device B3. Large-diameter cylindrical portion having an adjustment function when the position and the connection position of the sixth connection flange 51 formed in the casing 50 of the punching device C are different, and in which the fourth connection flange 40A is integrally formed 40B and a small-diameter cylindrical portion 40D integrally formed with a fifth connection flange 40C that can be connected in contact with the sixth connection flange 51 of the casing 50 of the punching device C from the branch axis X direction. Has been.

  The fourth connecting flange 40A of the joint flange 40 and the second connecting flange 27 of the first receiving flange 16 of the first receiving port 15 of the first gate valve device B1 or the second receiving port 25 of the second gate valve device B2. Or it fixes with the 3rd connection flange 36 of the straight tubular connection port part 35 of 3rd gate valve apparatus B3 in the watertight state so that attachment or detachment is possible via the several volt | bolt 41A and nut 41B which are examples of the 3rd fastening means 41. It is connected.

  The fifth connecting flange 40C of the joint flange 40 and the sixth connecting flange 51 of the casing 50 of the punching device C are watertight so as to be detachable via a plurality of bolts 42A and nuts 42B as an example of the fourth fastening means 42. It is fixedly connected in a state.

  At the end of the large-diameter cylindrical portion 40B of the joint flange 40, a tapered inner peripheral surface 15b for packing attachment formed on the inner peripheral surface 15a of the first receiving port portion 15 of the first gate valve device B1 or A cylindrical portion 40E that can enter from the direction of the branch axis X into the formation region of the tapered inner peripheral surface 25b for packing mounting formed on the inner peripheral surface 25a of the second receiving port 25 of the second gate valve device B2. Are integrally formed, and the cylindrical portion 40E is brought into contact with the tapered inner peripheral surface 15b of the first receiving portion 15 or the tapered inner peripheral surface 25b of the second receiving portion 25 from the branch axis X direction. A packing 43 for sealing is provided.

  As shown in FIG. 8, a fitting mounting portion 40 b of an annular groove into which the radially inner end portion 43 a of the packing 43 is fitted and mounted on the upstream end surface 40 a of the tubular portion 40 E in the joint flange 40. While being formed, the radially outer side end portion 43b of the packing 43 extends to a boundary portion between the outer peripheral surface 40c of the tubular portion 40E and the connection surface 40d of the fourth connection flange 40A or a vicinity thereof. ing.

  The outer peripheral surface 40c of the cylindrical portion 40E of the joint flange 40 is formed by the tapered inner peripheral surface 15b of the first receiving port 15 of the first gate valve device B1 or the second receiving port 25 of the second gate valve device B2. It is formed in the cyclic | annular inclined surface which follows or substantially follows the gradient of the taper-shaped inner peripheral surface 25b, and among the packing 43, the taper-shaped inner peripheral surface 15b of the 1st port part 15 or the taper of the 2nd port part 25 is shown. The first seal portion 43c that comes into contact with the inner circumferential surface 25b is configured to be thinner toward the connection surface 40d side (radially outward side) of the fourth connection flange 40A.

  The protruding length of the tubular portion 40E of the joint flange 40 in the direction of the branch axis X is that of the tapered inner peripheral surface 15b of the first receiving portion 15 or the tapered inner peripheral surface 25b of the second receiving portion 25. The length is smaller than the length in the branch axis X direction. In other words, it is more than the length in the direction of the branch axis X of at least a portion of the tapered inner peripheral surface 15b of the first receiving portion 15 or the tapered inner peripheral surface 25b of the second receiving portion 25 that contacts the packing 43. It is composed of small.

  In the packing 43, the outer surface of the second seal portion 43d that comes into contact with the end surface 35a of the straight tubular connecting port portion 35 from the branch axis X direction is the end surface 35a of the straight tubular connecting port portion 35 toward the center in the radial direction. It is formed in an arcuate surface protruding to the side.

  The packing 43 is fitted and held from the direction of the branch axis X with respect to the outer annular cylindrical portion 40Ea located on the radially outer side of the fitting mounting portion 40b among the cylindrical portions 40E of the joint flange 40. An annular fitting mounting recess 43e is formed.

  In the annular seal holding groove 40h formed on the connection surface of the fifth connection flange 40C of the joint flange 40, a space between the bolt 42A and the nut 42B is tightened with the sixth connection flange 51 of the drilling device C. A fourth sealing material 39 such as an O-ring that seals in a watertight state is attached.

  As the drilling device C, various structures have been conventionally developed. In this embodiment, a component of a rotary cutting tool is provided at the tip of the drive rotary shaft 52 protruding from the casing 50 into the joint flange 40. In this example, a cylindrical hole saw 53 having a cutting tip and a center drill 54 protruding forward from a rotation center position in the hole saw 53 are attached.

  And as shown in FIGS. 1-3, it is the 1st gate valve apparatus B1 of a K-shaped receptacle type that is connected to the branch port part 6 of the exterior split T-shaped pipe A to the water pipe 1 Then, the first connecting flange 16 of the first gate valve device B1 and the fourth connecting flange 40A of the joint flange 40 are relatively moved from the direction of the branch axis X by the tightening operation by the bolt 41A and the nut 41B of the third fastening means 41. When moved in proximity, the cylindrical portion 40E of the joint flange 40 enters the tapered inner peripheral surface 15b for packing installation of the first receiving portion 15 from the branch axis X direction, and the cylindrical portion 41E is fitted. The seal portion 43c of the packing 43 fitted and held in the mating mounting portion 40b is pressed against the tapered inner peripheral surface 15b of the first receiving portion 15.

  At this time, the outer peripheral surface 40c of the cylindrical portion 40E in the joint flange 40 is formed as an annular inclined surface along or substantially along the gradient of the tapered inner peripheral surface 15b of the first receiving portion 15, and the packing 43 itself is also a cylinder. Extended from the end face 40a of the shaped part 40E to the boundary part with the connecting surface 40d of the fourth connecting flange 40A or the vicinity thereof through the outer peripheral surface 40c, and the seal part 43c of the packing 43 is provided on the fourth connecting flange 40A. Since it is formed in a tapered shape that becomes thinner as it approaches the connecting surface 40d, the packing 43 is connected to the first receiving portion while suppressing a part of the packing 43 from entering between the connecting surfaces of both the connecting flanges 16 and 40A. It is possible to effectively press-contact 15 tapered inner peripheral surfaces 15b.

  Further, in this fixed connection state, the first connection flange 16 of the first receiving portion 15 and the fourth connection flange 40A of the joint flange 40 are in contact with each other from the direction of the branch axis X, and the packing 43 is fixed. It can be tightened by compressive force.

Next, as shown in FIGS. 4 and 5, the SII type inlet gate type second gate valve device B <b> 2 is connected to the branch pipe portion 6 of the exterior split T-shaped pipe A to the water pipe 1. Then, in the same manner as the above-described first gate valve device B1 of the K-shaped receiving type, the second connection flange 27 of the second gate valve device B2 and the fourth connection flange 40A of the mating flange 40 are connected to the third fastening means. When the bolt 41A and the nut 41B of 41 are used to tighten and move relative to each other from the direction of the branch axis X, the cylindrical portion 40E of the joint flange 40 has a tapered inner peripheral surface 25b for mounting the packing of the second receiving portion 25. The seal portion 43c of the packing 43 fitted and held in the fitting mounting portion 40b of the cylindrical portion 41E is pressed against the tapered inner peripheral surface 25b of the second receiving portion 25. Is done.

  At this time, the outer peripheral surface 40c of the cylindrical portion 40E in the joint flange 40 is formed as an annular inclined surface along or substantially along the gradient of the tapered inner peripheral surface 25b of the second receiving portion 25, and the packing 43 itself is also a cylinder. Extended from the end face 40a of the shaped part 40E to the boundary part with the connecting surface 40d of the fourth connecting flange 40A or the vicinity thereof through the outer peripheral surface 40c, and the seal part 43c of the packing 43 is provided on the fourth connecting flange 40A. Since it is formed in a tapered shape that becomes thinner as it approaches the connection surface 40d, the packing 43 is connected to the second receiving portion while suppressing a part of the packing 43 from entering between the connection surfaces of the connection flanges 27 and 40A. 25 can be effectively pressed against the tapered inner peripheral surface 25b.

Even if the first gate valve device B1 of the K-type receiving type and the second gate valve device B2 of the SII type receiving type have the same nominal diameter, the second of the SII type receiving type equipped with the lock ring 26 is used. The tapered inner peripheral surface 25b of the receiving portion 25 is configured to have a slightly larger dimension than the tapered inner peripheral surface 15b of the first receiving portion 15 of the K-shaped receiving type. -Like portion 40E is inserted into tapered inner peripheral surfaces 25b and 15b from the direction of branch axis X, and packing 43 provided on cylindrical portion 40E has a wedge effect on wide portions of tapered inner peripheral surfaces 25b and 15b. In any case, it is possible to securely connect in a watertight state.

In addition, the diameter of the bolt insertion hole 27a formed in the second connection flange 27 of the SII-type receiving type second gate valve device B2 is the same as the K-type receiving type first gate valve device B1 having the same nominal diameter. The dimension of the bolt insertion hole 16a formed in the first connection flange 16 is larger than the diameter of the bolt insertion hole 16a. It can absorb by making it a long hole.

  Next, as shown in FIGS. 6 and 7, when the flange type third gate valve device B3 is connected to the branch port portion 6 of the exterior split T-shaped tube A to the water pipe 1, The third connection flange 36 of the straight tubular connection port 35 of the third gate valve device B3 and the fourth connection flange 40A of the mating flange 40 are branched by tightening operation with the bolt 41A and the nut 41B of the third fastening means 41. When relatively close to the axial center X direction, the end surface 40a of the tubular portion 40E of the joint flange 40 moves close to the end surface 35a of the straight tubular connection port portion 35 while facing the branch axial core X direction. The arcuate surface of the radial center portion of the packing 43 fitted and held in the fitting mounting portion 40b of 41E is brought into pressure contact with the end surface 35a of the straight tubular connection port portion 35, and the third coupling flange 36 of the straight tubular connection port portion 35 and 4th connecting flange of joint flange 40 0A and fits securely connected in a watertight state.

The diameter dimension of the bolt insertion hole 36a formed in the third connection flange 36 of the flange type third gate valve device B3 is the same as the bolt insertion hole 16a of the first connection flange 16 of the K-type receiving type and the SII type receiving port. Since it becomes an intermediate dimension between the bolt insertion hole 27a of the second connection flange 27 of the type, it can be absorbed by the long hole of the bolt insertion hole 40e of the fourth connection flange 40A of the joint flange 40.

Accordingly, the first receiving portion 15 of the first gate valve device B1 of the K-type receiving type, the second receiving portion 25 of the second gate valve device B2 of the SII type receiving type, and the third gate valve device of the flange type. Since it is possible to share the joint flange 40 for the three types of the B3 straight tubular connection port portion 35, the equipment cost can be reduced, the drilling work can be facilitated, and the efficiency can be improved.

Next, FIGS. 9 and 10 show a connection structure in which the first branch pipe P1 is connected to the first receiving portion 15 of the first gate valve device B1 of the K-shaped receiving type after drilling.
In this connection structure, between the opposing surfaces of the outer peripheral surface of the first branch pipe P1 and the tapered inner peripheral surface 15b of the first receiving portion 15, a first synthetic rubber made by sealing between the two in a watertight state. A first push ring 56 made of cast iron capable of compressing the first packing 55 from the direction of the branch axis X is mounted on the first receiving portion 15, and the first push ring 56 and the first receiving port are mounted. The first connecting flange 16 of the portion 15 is fixedly connected via a plurality of bolts 57 </ b> A and nuts 57 </ b> B as an example of the fifth fastening means 57.

  The first packing 55 is compressed and deformed by the pressing portion on the tip end side of the first push ring 56 by the proximity movement of the first push ring 56 toward the first receiving portion 15 side in accordance with the tightening operation of the bolt 57A and the nut 57B. The space between the outer peripheral surface of the one branch pipe P1 and the tapered inner peripheral surface 15b of the first receiving port 15 is sealed.

11 and 12 show a connection structure in which the second branch pipe P2 is connected to the second receiving port 25 of the SII type receiving port type second gate valve device B2 after drilling.
In this connection structure, between the opposing surfaces of the outer peripheral surface of the second branch pipe P2 and the tapered inner peripheral surface 25b of the second receiving port 25, a second synthetic rubber that can be sealed between the two in a watertight state. A second push ring 59 made of cast iron capable of compressing the second packing 58 from the direction of the branch axis X is mounted on the second receiving portion 25, and the second push ring 59 and the second receiving port are mounted. The second connecting flange 27 of the portion 25 is fixedly connected via a plurality of bolts 60 </ b> A and nuts 60 </ b> B as an example of the sixth fastening means 60.

  The second packing 58 is compressed and deformed by the pressing portion on the distal end side of the second pusher wheel 59 by the close movement of the second pusher wheel 59 toward the second receiving portion 25 side in accordance with the tightening operation of the bolt 60A and the nut 60B. The space between the outer peripheral surface of the bifurcated pipe P2 and the tapered inner peripheral surface 25b of the second receiving portion 25 is sealed.

13 and 14 show a connection structure in which the third branch pipe P3 is connected to the straight tubular connection port portion 35 of the flange type third gate valve device B3 after drilling.
In this connection structure, the third connection flange 36 of the straight tubular connection port portion 35 and the seventh connection flange 61 of the third branch pipe P3 are connected via a plurality of bolts 62A and nuts 62B as an example of the seventh fastening means 62. Fixedly connected.

  As the bolts 62A and nuts 62B are tightened, the third packing 63 mounted in the annular groove on the connection surface of the seventh connection flange 61 is compressed and deformed, and the seventh connection flange 61 of the third branch pipe P3 and the straight tube are compressed. A space between the connection port portion 35 and the third connection flange 36 is sealed.

[Second Embodiment]
In the first embodiment described above, the end surface 40a of the tubular portion 40E of the joint flange 40 is configured as a right-angle plane orthogonal to the branch axis X, but as shown in FIG. 15, the end surface 40a of the tubular portion 40E. Among them, the end surface portion 40aa located on the radially inner side of the fitting / mounting portion 40b has an end surface 35a of the straight tubular connection port portion 35 rather than the end surface portion 40ab located on the radially outer side of the fitting / mounting portion 40b. When the third connecting flange 36 of the straight tubular connection port portion 35 and the fourth connecting flange 40A of the joint flange 40 are fastened and fixed by the bolt 41A and the nut 41B of the third fastening means 41, the radial direction is obtained. The inner end surface portion 40aa may be configured to abut on the end surface 35a of the straight tubular connection port portion 35 from the branch axis X direction.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Third Embodiment]
In the above-described first embodiment, the fitting mounting portion 40b of the annular groove in which the radially inner side end portion 43a of the packing 43 is fitted and mounted on the end surface 40a of the cylindrical portion 40E of the joint flange 40 is connected to the branch shaft. Although formed linearly along the core X direction, as shown in FIG. 16, the annular groove fitting mounting portion 40b has an L-shape whose back side is bent at right angles to the radially outward side in a longitudinal sectional view. In addition, the radially inward end portion 43a of the packing 43 may be formed in an L shape in a longitudinal sectional view that can be forcibly fitted along the fitting mounting portion 40b.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Fourth Embodiment]
In the first embodiment described above, the fitting mounting portion 40b for fitting and mounting the radially inner end portion 43a of the packing 43 is formed in the annular groove, but the fitting mounting portion 40b is shown in FIG. And a second fitting / mounting concave portion 43f formed in the packing 43 and an annular convex portion 40g formed on the end surface 40a of the cylindrical portion 40E so as to be fitted in the branch axis X direction. May be.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Other Embodiments]
(1) In the first embodiment described above, the first receiving part 15 of the first gate valve device B1 of the K-type receiving type and the second receiving part 25 of the second gate valve device B2 of the SII type receiving type. And flange type third
Although the joint flange 40 shared by three types with the straight tubular connection port part 35 of the gate valve apparatus B3 was demonstrated, as the joint flange 40, the 1st port of 1st gate valve apparatus B1 of a K-shaped port type is used. Two types, that is, a part 15 and a straight tubular connection port 35 of the flange type third gate valve device B3, or a second type of the second port 25 and flange type of the SII type second gate valve device B2. It may be shared by two types with the straight tubular connection port 35 of the third gate valve device B3.

  (2) The branch port portion 6 of the split T-shaped tube A and the first connection port portion 14 of the first gate valve device B1 or the second connection port portion 24 of the second gate valve device B2 or the third gate valve device B3. The joint structure with the third connection port portion 34 is not limited to the joint structure described in the first embodiment, and can be variously changed according to various conditions.

  (3) The joint structure between the joint flange 40 and the punching device C is not limited to the joint structure described in the first embodiment, and can be variously changed according to various conditions.

  (4) In the first embodiment described above, the water pipe 1 has been described as an example of the fluid pipe. However, other fluid pipes such as a sewage pipe may be used.

  As described above, it is possible to provide a fluid pipe drilling facility and a fitting flange used therefor, which can reduce the cost of equipment, facilitate drilling work, and improve efficiency.

A T-shaped joint (split T-shaped pipe)
B1 First gate valve device B2 Second gate valve device B3 Third gate valve device C Punching device P1 Branch pipe (first branch pipe)
P2 branch pipe (second branch pipe)
P3 branch pipe (third branch pipe)
X Branch axis 1 Fluid pipe (water pipe)
1A Pipe Wall 2 Through Hole 6 Branch Port 12 Gate Valve (First Gate Valve)
14 1st connection port part 15 1st port part 15b Tapered inner peripheral surface 16 1st connection flange 22 Gate valve (2nd gate valve)
24 2nd connection port part 25 2nd port part 25b Taper-shaped inner peripheral surface 25c Ring installation groove | channel 32 Gate valve (3rd gate valve)
34 3rd connection port part 35 Straight tubular connection port part 35a End surface 36 3rd connection flange 40 Joint flange 40A 4th connection flange 40C 5th connection flange 40E Cylindrical part 40a End surface 40b Fitting mounting part 40c Outer peripheral surface 40d Connection surface 43 Packing 43a Radially inner end 43b Radially outer end 43c Seal portion (first seal portion)
43d Seal part (second seal part)

Claims (8)

A first gate valve device in which a gate valve is provided between a first connection port portion to which a branch port portion of a T-shaped joint that can be attached to the fluid pipe is connected and a first port portion to which the branch pipe is connected; Alternatively, a ring mounting groove in which a gate valve and a lock ring are mounted is provided between the second connection port portion to which the branch port portion of the T-shaped joint is connected and the second receiving port portion to which the branch pipe is connected. A third partition in which a partition valve is provided between a second gate valve device and a third connection port portion to which the branch port portion of the T-shaped joint is connected and a straight tubular connection port portion to which the branch pipe is connected A fluid pipe drilling facility configured to be selectively connectable to a valve device with a flange of a drilling device that forms a through hole in the pipe wall of the fluid pipe in a watertight state,
The mating flange includes a first connection flange formed at the first receiving port or a second connection flange formed at the second receiving port and a third connection flange formed at the straight tubular connection port. A fourth connecting flange that can be alternatively connected to the branch axis from the direction of the branch axis, a tapered inner peripheral surface for mounting the packing of the first receiving port, or a packing mounting of the second receiving port A cylindrical portion that can enter the tapered inner peripheral surface from the branch axis direction and has an end surface facing the branch axis direction on the end surface of the straight tubular connection port portion is formed. The tubular portion of the joint flange is selected with respect to the tapered inner peripheral surface of the first receiving portion or the tapered inner peripheral surface of the second receiving portion and the end surface of the straight tubular connecting port portion. Perforating equipment for fluid pipes provided with a packing which makes contact and water tight. A first gate valve device in which a gate valve is provided between a first connection port portion to which a branch port portion of a T-shaped joint attachable to the fluid pipe is connected and a first port portion to which the branch pipe is connected; A ring mounting groove for mounting a gate valve and a lock ring is provided between the second connection port portion to which the branch port portion of the T-shaped joint is connected and the second receiving port portion to which the branch pipe is connected. A third gate valve in which a gate valve is provided between the second gate valve device and a third connection port portion to which the branch port portion of the T-shaped joint is connected and a straight tubular connection port portion to which the branch pipe is connected. A fluid pipe drilling facility configured to be selectively connectable to a device in a watertight state with a joint flange of a drilling device that forms a through hole in the pipe wall of the fluid pipe;
The joint flange includes a first connection flange formed at the first receiving port, a second connection flange formed at the second receiving port, and a third connection flange formed at the straight tubular connection port. A fourth connecting flange that can be selectively connected to the branch axis direction, a tapered inner peripheral surface for mounting the packing of the first receiving port, and a packing mounting for the second receiving port. A cylindrical portion is formed which can be selectively inserted into the tapered inner peripheral surface from the branch axis direction and has an end surface facing the branch tube axis direction on the end surface of the straight tubular connection port portion. In addition, the cylindrical portion of the joint flange includes a tapered inner peripheral surface of the first receiving portion, a tapered inner peripheral surface of the second receiving portion, and an end surface of the straight tubular connection opening portion. Drilling equipment for fluid pipes provided with a packing that is selectively brought into contact with water to make it watertight.   An annular fitting / mounting portion is formed on the end surface of the tubular portion of the fitting flange, and the radially inner end portion of the packing is fitted and mounted, and the radially outer end portion of the packing is formed. The perforation equipment for fluid pipes according to claim 1 or 2, which extends to a boundary portion between the outer peripheral surface of the cylindrical portion and the connection surface of the fourth connection flange or a vicinity thereof.   The outer peripheral surface of the cylindrical portion of the joint flange is formed as an annular inclined surface along or substantially along the gradient of the tapered inner peripheral surface of the first receiving portion or the tapered inner peripheral surface of the second receiving portion. The perforation equipment for fluid pipes according to any one of claims 1 to 3.   Of the packing, the seal portion that contacts the tapered inner peripheral surface of the first receiving portion or the tapered inner peripheral surface of the second receiving portion is configured to be thinner toward the connecting surface side of the fourth connecting flange. The perforation equipment for fluid pipes according to any one of claims 1 to 4.   Of the packing, the outer surface of the seal portion that contacts the end surface of the straight tubular connection port portion is formed into an arcuate surface that protrudes toward the end surface side of the straight tubular connection port portion in the branch axis direction toward the radial center. The perforation equipment for fluid pipes according to any one of claims 1 to 5.   The protruding length of the tubular portion of the fitting flange in the branch axis direction is the direction of the branch axis of the tapered inner peripheral surface of the first receiving portion or the tapered inner peripheral surface of the second receiving portion. The perforation equipment for a fluid pipe according to any one of claims 1 to 6, wherein the perforation equipment is configured to be smaller than the length of the fluid pipe.   It is a joint flange used for the drilling equipment for fluid pipes of any one of Claims 1-7, Comprising: The said 4th connection flange and a cylindrical part are formed in the one end side site | part of a branch axis direction. In addition, a fifth flange of the fluid pipe drilling facility is formed at the other end side portion in the branch axis direction in which a fifth connection flange that can be connected to the drilling device is formed.

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