JP2011089593A - Pipe connecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe connecting device always maintaining a flow rate from a fluid pipe to a branch pipe connected to a communicated connection part through a branch port. <P>SOLUTION: The pipe connecting device 10 includes a covering part 11 covering the fluid pipe 1, an opening part 13 having an opening end 13a along an opening end 1b of the branch port 1a formed on the fluid pipe 1, the connecting part 15 opened to water-tightly connect the branch pipe 40, and an opening and closing valve part 14 capable of communicating the opening part 13 with the connecting part 15, and is water-tightly connected with relative movement in the prescribed limit amount allowed with respect to the fluid pipe 1. The opening part 13 has the opening end 13a having an opening area larger than the opening end 1b of the branch port 1a so that the opening area of the branch port 1a can be maintained even when the pipe connecting device 10 is relatively moved to the limit amount. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention provides a watertight seal for a covering portion for covering a fluid pipe, an opening portion having an opening edge along the opening edge of the branch opening formed in the fluid pipe, and a perforator or a branch pipe for forming the branch opening. A pipe that is connected to the fluid pipe in a watertight manner in a state that allows a predetermined amount of relative movement to the fluid pipe. It relates to the connection device.

  A conventional pipe connection device includes an opening having an opening edge having substantially the same shape as an opening edge of a branch port formed in a fluid pipe, and is connected to the fluid pipe in a watertight manner (see, for example, Patent Document 1). .

Japanese Patent No. 4162063 (page 4, FIG. 1)

  However, in Patent Document 1, as shown in FIG. 9A, when the pipe connecting device after being connected to the fluid pipe 100 is moved relative to the fluid pipe by an unexpected external force such as an earthquake. As shown in FIG. 9B, the opening edge 130a of the opening 130 constituting the pipe connecting device partially covers the opening edge 100b of the branch port 100a of the fluid pipe 100, There is a problem that the opening area K ′ is smaller than the opening area K at the beginning of connection, and the flow rate diverted from the fluid pipe 100 toward the branch pipe via the branch port 100a may decrease.

  The present invention has been made paying attention to such problems, and provides a pipe connection device that can always maintain a flow rate from a fluid pipe to a branch pipe connected to a connection portion that communicates via a branch port. For the purpose.

In order to solve the above-mentioned problem, the pipe connection device of the present invention includes:
A watertight connection can be made between a covering portion for covering a fluid pipe, an opening portion having an opening edge along the opening edge of the branch opening formed in the fluid pipe, and a drilling machine or a branch pipe for making the branch opening. A pipe connection device comprising: a connection portion that is open to the fluid; and an on-off valve portion that allows the opening portion and the connection portion to communicate with each other, wherein the fluid pipe is connected in a watertight manner while allowing a predetermined amount of relative movement. Because
The opening has an opening edge of an opening region larger than the opening edge of the branch port so that the opening region of the branch port can be maintained even if the pipe connecting device moves relative to the limit amount. It is a feature.
According to this feature, an opening having an opening edge of a sufficiently large opening region even when the pipe connecting device connected in a watertight manner to the fluid pipe moves relative to the fluid pipe up to a predetermined limit amount due to an unexpected external force or the like. Since the opening area of the branch port of the fluid pipe is maintained by the section, the flow rate from the fluid pipe to the branch pipe connected to the connecting portion that communicates with the branch pipe is always maintained.

The pipe connecting device of the present invention is
The opening has an open area opened between the opening and closing valve.
According to this feature, even if the pipe connecting device moves relative to the fluid pipe up to a predetermined limit amount, the opening / closing valve portion is opened via the branch port by the opening portion having an open area opened between the opening / closing valve portion and the opening / closing valve portion. As a result, a flow path toward the pipe is secured, and the flow rate to the branch pipe connected to the connecting portion that communicates is reliably maintained.

The pipe connecting device of the present invention is
The pipe connecting device is configured to be connected to the fluid pipe by assembling the covering part and at least the opening part separate from the covering part to the fluid pipe, and the opening. The opening edge of a part is opening toward the said coating | coated part, It is characterized by the above-mentioned.
According to this feature, the opening edge of the opening and the opening edge of the branch port formed in the fluid pipe can be easily aligned and connected to the fluid pipe simply by assembling the opening and the covering portion.

The pipe connecting device of the present invention is
The opening edge of the opening is formed substantially coaxially with the opening edge of the branch port.
According to this feature, since the opening edge of the opening is formed substantially coaxially with the opening edge of the branch port, the range of relative movement of the pipe connecting device with respect to the fluid pipe can be expanded in multiple directions.

It is side sectional drawing which shows the pipe | tube connection apparatus in an Example. It is a sectional side view which shows the state which has pierced the fluid pipe | tube in an Example. It is a sectional side view which shows the state which removes the cylindrical body in an Example. (A) is a partial sectional side view of the cylindrical body in an Example, (b) is a rear view like (a). It is a sectional side view which shows the state which connected the branch pipe in an Example. It is a sectional side view showing the state where the fluid pipe and pipe connecting device in an example moved relatively. It is a sectional side view which shows the state which connected the branch pipe in a modification. It is a sectional side view showing the state where the fluid pipe and pipe connecting device in a modification have moved relative to each other. (A) is a schematic diagram which shows the initial connection state of the conventional fluid pipe | tube and the opening part of a pipe connection apparatus, (b) is a schematic diagram which shows the state moved relatively similarly to (a).

  EMBODIMENT OF THE INVENTION The form for implementing the pipe | tube connection apparatus which concerns on this invention is demonstrated below based on an Example. 1 to 3, FIG. 4A, FIG. 5, and FIG. 7 will be described as the front (front) side, and the right side in the drawing will be described as the rear (back) side.

  As shown in FIG. 1, the pipe connection device 10 maintains water tightness on the outer peripheral surface of an existing fluid pipe 1 made of ductile cast iron or the like embedded in the ground, and a predetermined limit with the fluid pipe 1. It is mounted in a state that allows relative movement of the amount. The pipe connection device 10 includes a casing 12 that can be divided into two in the radial direction and a separate covering portion 11. The pipe connection device 10 is not limited to two divisions, and may be divided into a plurality of divisions such as three divisions. In the present embodiment, the fluid in the fluid pipe is clean water, but the fluid flowing in the fluid pipe 1 is not necessarily limited to clean water, and may be, for example, industrial water, or a gas or gas-liquid mixed state. It may be a fluid pipe through which the fluid flows.

  The housing 12 is formed by integrally forming an opening portion 13, an on-off valve portion 14, and a connecting portion 15 in order from the fluid tube 1 side, facing outward at substantially right angles to the tube axis. Note that at least one of the opening 13, the on-off valve 14, and the connection 15 may be provided separately from the others. The opening portion 13 and the connection portion 15 can communicate with each other by the on-off valve portion 14 and have an inner space structure that extends in the axial direction of the branch port 1 a formed in the fluid pipe 1. The opening part 13 has an opening edge 13a that opens toward the covering part 11, and the opening area of the opening edge 13a is continuous with the opening area on the on-off valve part 14 side. The casing 12 constituting the opening 13, the on-off valve 14, and the connecting portion 15, and the covering portion 11 are connected to each other by bolts and nuts 30 through water-stop members 31 and 32 disposed between the opposing surfaces. The fluid pipes 1 are assembled with each other. Instead of or in addition to the water stop members 31 and 32 described above, packing (not shown) may be interposed between the inner peripheral surface along the opening edge 13 of the opening 13 and the outer peripheral surface of the fluid pipe 1. In the case of relative movement between the fluid pipe 1 and the pipe connection device 10, the packing only needs to follow the inner peripheral surface of the opening 13 and can maintain watertightness without straddling the branch port 1 a.

  In this manner, the casing 12 and the covering portion that constitute the opening 13 in a state where the opening edge 13a of the opening 13 and the opening edge of the branch port formed in the fluid pipe 1 as described later are easily aligned. 11 can be connected to the fluid pipe simply by assembling.

  The on-off valve portion 14 can be opened and closed between the opening portion 13 and the connection portion 15 by a valve body 14a that moves up and down by a turning operation of the valve shaft 14b.

  On the inner peripheral surface of the connecting portion 15, the connecting portion 15 is located more than the annular groove 15 a in which the lock ring 22 is installed as an engaging portion that engages with the branch pipe 40 connected to the connecting portion 15. An enlarged diameter portion 15b in which the water stop packing 23 is accommodated near the outer end 15c is formed. On the outer peripheral surface of the connecting portion 15, a concave groove 15 e into which the flange member 20 having a divided structure is fitted is formed. Further, in the vicinity of the outer end 15c, adjustment screws 24 are respectively screwed into screw holes 15d that are formed in a plurality in the circumferential direction and extending in the radial direction. Further, an anti-bending ring 35 is provided in advance at the tip of the adjustment screw 24 along the inner peripheral surface of the connecting portion 15 for preventing the bending of the branch pipe described later. Although not particularly shown, the bend preventing ring 35 includes a plurality of arc members adjacent in the circumferential direction and a fixing member interposed between the arc members.

  Next, drilling of the branch port 1a in the fluid pipe 1 using the pipe connecting device 10 will be described.

  As shown in FIGS. 1 and 2, the structure at the time of drilling the branch port 1 a will be described first. A substantially cylindrical tubular body 17 is inserted into the connection portion 15. As shown in FIGS. 4 (a) and 4 (b), the cylindrical body 17 is provided with a close contact member 26 made of an elastic material such as rubber on the front peripheral surface of a body cylinder made of a metal material such as ductile cast iron. Further, a flange portion 17a protruding in the outer diameter direction is formed at the rear end. Further, the main body cylinder of the cylindrical body 17 is composed of a diameter-enlarged cylinder part 17e on the flange part 17a side and a diameter-reduced cylinder part 17d on the distal end circumferential surface side. The outer diameter is slightly smaller than that.

  The cylindrical body 17 fitted in the connecting portion 15 has the contact member 26 abuts on the reduced diameter inner surface 15f of the connecting portion 15 near the on-off valve portion 14 and the flange portion 17a contacts the outer end 15c of the connecting portion 15. By contacting, an annular groove 15a and an enlarged diameter portion 15b as an engaging portion are interposed between a punching machine 16 described later. The cylindrical body 17 is configured so that the axial center of the cylindrical body 17 can be aligned by inserting the adjusting screw 24 as appropriate after being fitted into the connecting portion 15. The cylindrical body 17 is in watertight contact with the water stop packing 23 accommodated in the enlarged diameter portion 15b. As shown in FIG. 1, the cylindrical body 17 includes a lock ring 22, a water-stop packing 23, an adjustment screw 24, and an anti-bending ring 35 that are used for connection to the branch pipe in advance on the inner peripheral surface of the connection portion 15. In this state, it is inserted into the connecting portion 15. Further, according to the cylindrical body 17 having the above-described shape, the inside of the connection portion 15 can be easily fitted by the reduced diameter cylindrical portion 17d, and the enlarged diameter cylindrical portion 17e can be easily brought into watertight contact with the water blocking packing 23.

  Further, a borer head 18 as a water-stopping lid, which is an accessory part of the punching machine 16, is attached to the back side of the flange portion 17 a of the cylindrical body 17. The borer head 18 is fixed to the flange member 20 externally fitted in the concave groove 15e of the connecting portion 15 by a long bolt / nut 25 and presses and holds the packing 27 disposed on the back surface of the flange portion 17a, thereby connecting the connecting portion. 15 is kept watertight. In the borer head 18, the projecting portion 17 c that protrudes rearward on the back surface of the flange portion 17 a is fitted in a central recess 18 b formed on the front surface of the borer head 18, so that the axial center of the drilling machine 16 is aligned. It is attached.

  The borer head 18 is formed with a communication passage 18a that extends in the outer diameter direction and communicates the inside and outside of the borer head 18, and is further provided with a discharge valve 19 that opens and closes the communication passage 18a.

  Next, as shown in FIG. 2, the step of drilling the branch port 1 a will be described. The valve body 14 a of the on-off valve portion 14 is raised, the discharge valve 19 is opened, and the substantially cylindrical shape constituting the drilling machine 16 is formed. The cutter 21 is sent out to the fluid pipe 1 side to perform perforation. Between this drilling machine 16 and the annular groove 15a and the enlarged diameter part 15b as the engaging part, a cylindrical body 17 that prevents entry of chips into the annular groove 15a and the enlarged diameter part 15b is interposed. As a result, the chips generated from the tube wall along with the fluid flowing out of the fluid pipe 1 circulates inside the cylindrical body 17 without entering the annular groove 15a and the enlarged diameter portion 15b. It can discharge | emit outside the connection part 15 via the communicating path 18a. By this perforation, a substantially circular branch port 1a is formed in a direction orthogonal to the tube axis.

  Further, just by pushing the cylindrical body 17 toward the opening / closing valve portion 14 side of the connecting portion 15, the contact member 26 provided on the peripheral surface of the distal end causes the opening / closing valve to be more than the annular groove 15a as the engaging portion and the enlarged diameter portion 15b. It closely adheres to the reduced-diameter inner surface 15f on the part 14 side and can easily prevent chips from entering. In addition, the cylindrical body does not necessarily need to be equipped with the contact | adherence member 26 in the front-end | tip peripheral surface, and may consist only of a single cylinder member. Furthermore, the cylindrical body is not necessarily limited to the one having water-tightness, and may be formed of a mesh body having such a fineness as to prevent, for example, entry of chips.

  After drilling the branch port 1a, the cutter 21 of the punching machine 16 is pulled back to the connection part 15 side, the valve body 14a of the on-off valve part 14 is lowered, and the borer head 18, the punching machine 16, and further the flange member 20 from the connection part 15. Remove.

  As shown in FIG. 3, just by screwing the screw 28 toward the outer end 15c side of the connecting portion 15 into the female screw hole 17b formed in the flange portion 17a, the outer end 15c is used as a reaction force. Thus, the cylindrical body 17 can be removed from the connecting portion 15.

  As shown in FIG. 5, after removing the cylindrical body 17, the branch pipe 40 having the bulging portion 40 a having the bulging tip in the outer diameter direction is inserted inside the connecting portion 15. The branch pipe 40 inserted into the connecting portion 15 is prevented from being pulled out when the bulging portion 40 a is engaged with the lock ring 22, and the watertightness is maintained because the outer peripheral surface abuts against the water blocking packing 23. . Further, the adjustment pipe 24 is screwed in appropriately, and the bending prevention ring 35 is brought into contact with the outer peripheral surface of the branch pipe 40, thereby preventing the branch pipe 40 from being bent after connection. Next, by raising the valve body 14a again, the fluid pipe 1 and the branch pipe 40 communicate with each other through the branch port 1a.

  In this way, the chips when the perforating machine 16 perforates the branch port 1a by the tubular body 17 interposed between the perforating machine 16 and the annular groove 15a and the enlarged diameter part 15b as the engaging parts. Can be prevented from entering the engaging portion. After the branch port 1a is formed, the annular groove 15a and the enlarged diameter portion 15b are engaged with the branch pipe 40 without causing trouble due to the ingress of chips, and the branch pipe. Can be connected to the connecting portion while maintaining watertightness. Further, in the state in which the cylindrical body 17 is assembled in advance with the lock ring 22, the water stop packing 23, the adjustment screw 24 and the bending prevention ring 35 used for connection with the branch pipe on the inner peripheral surface of the connection portion 15. 15 can be inserted into the branch pipe 40 immediately after removing the cylindrical body 17 without requiring another assembling step.

  Next, the relative movement between the fluid pipe 1 and the pipe connecting device 10 after the perforation of the branch port 1a and the installation of the branch pipe 40 will be described.

  The opening edge 13a of the opening 13 is formed in a substantially circular shape that is sufficiently larger than the opening edge 1b of the branch port 1a. As shown in FIG. 5, immediately after the perforation of the branch port 1a and the installation of the branch pipe 40, the opening edge 13a of the opening 13 is substantially coaxial with the substantially circular opening edge 1b of the branch port 1a and is larger. It is formed in a substantially circular shape with a caliber.

  As shown in FIG. 6, even when the fluid pipe 1 and the pipe connecting device 10 move relative to each other by a predetermined limit amount in the direction around the pipe axis, the opening edge 1 b of the branch port 1 a is the opening edge of the opening portion 13. The open area is maintained without being covered with 13a.

  As described above, the pipe connection device 10 connected to the fluid pipe 1 in a watertight manner has the opening edge 13a of the sufficiently large opening area even if the pipe connection apparatus 10 moves relative to the fluid pipe to a predetermined limit amount due to an unexpected external force or the like. Since the opening region of the branch port 1a of the fluid pipe 1 is maintained by the opening 13, the flow rate from the fluid pipe 1 to the branch pipe 40 connected to the connecting portion 15 through the branch port 1a is always maintained. Will be. Even if the pipe connecting device 10 moves relative to the fluid pipe 1 to a predetermined limit amount, the opening and closing valve 13 is opened and closed by the opening 13 having the open region S between the opening and closing valve portion 14 and opened and closed. A flow path toward the valve portion 14 is secured, and the flow rate to the branch pipe 40 connected to the connecting portion 15 communicating with the valve portion 14 is reliably maintained.

  In addition, although not particularly illustrated, the fluid pipe 1 and the pipe connecting device 10 are not necessarily limited to those that move relative to each other in the direction around the pipe axis of the fluid pipe 1. For example, the fluid pipe 1 and the pipe connecting device 10 are fluids. Even if it moves relative to the pipe axis direction of the pipe 1 or the direction around the pipe axis of the fluid pipe 1 and the pipe axis direction up to a predetermined limit, it has an opening edge 13a of a sufficiently large opening area. The opening region of the branch port 1a of the fluid pipe 1 is maintained by the opened portion 13. As described above, the opening edge 13a of the opening 13 is formed substantially coaxially with the opening edge 1b of the branch port 1a, so that the range of relative movement of the pipe connecting device 10 relative to the fluid pipe 1 can be expanded in multiple directions. it can.

  In addition, the predetermined limit amount of relative movement allowed for the fluid pipe 1 and the pipe connecting device 10 of the present embodiment is a total of approximately 15 degrees positive and negative around the pipe axis of the fluid pipe 1 with reference to the initial connection. Although it is 30 degrees and is the total approximate diameter length of the approximate radial lengths of the front and rear branch ports 1a in the pipe axis direction of the fluid pipe 1, the predetermined limit amount is not necessarily limited to the above-described amount, and is set as appropriate It does not matter what is done. Furthermore, the direction of relative movement allowed for the fluid pipe 1 and the pipe connecting device 10 may be, for example, only around the pipe axis of the fluid pipe 1 or only in the pipe axis direction.

  Next, as shown in FIG. 7 as a modification of the present invention, the structure of the fluid pipe 1 for anticorrosion or perforation of the opening edge 13a of the branch port 1a is formed in the branch port 1a formed by drilling the fluid pipe 1. A core 29 for strength maintenance is inserted.

  The core 29 has a substantially cylindrical shape having an outer peripheral surface that contacts the opening edge 13a of the branch port 1a. The core 29 has a projecting port 29a projecting toward the on-off valve unit 14 in the opening 13, and the branch port 1a has On the other hand, it is fixed substantially coaxially.

  The opening 13 has an open area S that is opened between the opening and closing valve section 14 so that the opening area of the protruding port 29a can be maintained even if the pipe connecting device 10 moves relative to the limit amount. As shown in FIG. 8, the pipe connecting device 10 is connected to the fluid pipe 1 in which the substantially cylindrical core 29 is inserted into the branch port 1 a, and the pipe connecting apparatus 10 reaches the predetermined limit amount with respect to the fluid pipe 1. Even if the movement is relative, the opening 13 having a sufficiently wide open region S maintains the opening region of the protruding port 29a of the core 29 leading to the branch port 1a. Thus, the flow rate to the branch pipe 40 connected to the connecting portion 15 that is in communication is maintained through the protruding port 29a. Furthermore, when the relative movement between the pipe connecting device 10 and the fluid pipe 1 reaches a predetermined limit, the projecting opening 29a of the core 29 abuts on the inner peripheral surface of the opening 13 in the open region S, so that the pipe connecting device 10 And the fluid pipe 1 are formed so as to prevent relative movement exceeding a predetermined limit amount.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the embodiment, when the drilling machine 16 is connected, the tubular body 17 is interposed between the annular groove 15a and the enlarged diameter part 15b as the engaging part of the connection part 15 and the drilling machine 16. For example, you may connect a drilling machine directly to a connection part, without interposing a cylindrical body.

  Further, for example, in the embodiment, the opening edge 13a of the opening portion 13 constituting the pipe connecting device 10 is formed substantially coaxially with the opening edge 1b of the branch port 1a formed in the fluid pipe 1, for example, The opening edge of the opening may have an eccentric shape with a larger opening in the direction in which the pipe connecting device moves relative to the fluid pipe.

DESCRIPTION OF SYMBOLS 1 Fluid pipe 1a Branch port 1b Opening edge 10 Pipe connection apparatus 11 Covering part 12 Housing | casing part 13 Opening part 13a Opening edge 14 On-off valve part 14a Valve body 15 Connection part 15a Annular groove 15b Expanding part 15c Outer end 15e Concave groove 16 Perforation Machine 17 Cylindrical body 18 Borer head 18a Communication passage 19 Discharge valve 20 Flange member 21 Cutter 22 Lock ring 23 Water seal 26 Contact member 28 Screw 29 Core 29a Protrusion port 40 Branch pipe

Claims (4)

A watertight connection can be made between a covering portion for covering a fluid pipe, an opening portion having an opening edge along the opening edge of the branch opening formed in the fluid pipe, and a drilling machine or a branch pipe for making the branch opening. A pipe connection device comprising: a connection portion that is open to the fluid; and an on-off valve portion that allows the opening portion and the connection portion to communicate with each other, wherein the fluid pipe is connected in a watertight manner while allowing a predetermined amount of relative movement. Because
The opening has an opening edge of an opening region larger than the opening edge of the branch port so that the opening region of the branch port can be maintained even if the pipe connecting device moves relative to the limit amount. A pipe connecting device characterized.   The pipe connection device according to claim 1, wherein the opening has an open area opened between the opening and closing valve.   The pipe connecting device is configured to be connected to the fluid pipe by assembling the covering part and at least the opening part separate from the covering part to the fluid pipe, and the opening. The pipe connecting device according to claim 1, wherein an opening edge of the portion opens toward the covering portion.   The pipe connection device according to any one of claims 1 to 3, wherein an opening edge of the opening is formed substantially coaxially with an opening edge of the branch port.

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