JP2012225470A - Bypass device and fluid pipe having bypass device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bypass device by which a flow restrictor can provide sufficient sealability, and a fluid pipe having the bypass device.SOLUTION: This bypass device is provided for maintaining an uninterrupted flow state of the fluid pipe 1 via a bypass pipe 12 connected to a pipe coupling 2, and includes at least a hole boring means 50 for boring an insertion hole 1b for inserting the flow restrictor 11 for cutting off a flow passage of the fluid pipe 1, in an outer peripheral surface 1a of the fluid pipe 1, and the hole boring means 50 bores a communicating hole 1c for connecting the fluid pipe 1 with the bypass pipe 12, in the outer peripheral surface 1a of the fluid pipe 1 independently of the insertion hole 1b.

Description

  The present invention relates to a bypass device that maintains a continuous flow state of a fluid pipe via a bypass pipe connected to a pipe joint, and a fluid pipe including the bypass device.

  A conventional partition valve device (bypass device) includes a sealing case (pipe joint) for sealingly surrounding a pipe outer peripheral surface of a portion where a through hole (insertion hole) of a pipe (fluid pipe) is formed, and this sealing A partition valve element (fluid control) accommodated in the case, and the partition valve element is inserted and arranged in the pipe through the through hole, and shuts off the flow path of the pipe. The fluid changes the flow path toward the branch pipe (bypass pipe) connected to the sealed case through a gap formed between the partition valve body and the through hole on the upstream side of the fluid pipe. (For example, refer to Patent Document 1).

Japanese Patent No. 3570742 (5th page, FIG. 6)

  However, in the bypass device described in Patent Document 1, when the flow path of the pipe (fluid pipe) is partitioned by the partition valve body (fluid control), the gap between the through hole (insertion hole) and the partition valve body Since the shape of the partition valve body is formed so that a gap is formed so that the fluid flows toward the branch pipe (bypass pipe), the direction of the partition valve body must be surely positioned with respect to the fluid pipe. In this case, there is a problem that the partitioning valve body cannot obtain a sufficient sealing performance for blocking the flow path of the pipe.

  The present invention has been made paying attention to such a problem, and an object of the present invention is to provide a bypass device and a fluid pipe including the bypass device, in which the fluid control can obtain a sufficient sealing performance.

In order to solve the above-described problem, the bypass device of the present invention includes:
A bypass device that maintains an uninterrupted flow state of a fluid pipe via a bypass pipe connected to a pipe joint,
And a perforating means for perforating an outer peripheral surface of the fluid pipe for inserting a control fluid for blocking a flow path of the fluid pipe, wherein the perforating means communicates the fluid pipe and the bypass pipe. The communication hole to be made is formed in the outer peripheral surface of the fluid pipe independently of the insertion hole.
According to this feature, since the insertion hole is independent from the communication hole when the flow path of the fluid pipe is blocked, the fluid control is not interfered with the communication hole for the bypass pipe. Any general-purpose shutoff valve can be used as long as it can shut off the flow path, and the sealing performance of the fluid control can be improved when the flow path is shut off. In addition, the size and shape of the communication hole can be arbitrarily set.

The bypass device of the present invention is
The perforating means is characterized in that the insertion hole and the communication hole are perforated on the same side of the outer peripheral surface of the fluid pipe.
According to this feature, the insertion hole and the communication hole can be formed from the same direction without changing the direction of the punching means, so that the insertion hole and the communication hole can be easily formed.

The bypass device of the present invention is
The punching means is characterized in that a first cutter member for drilling the insertion hole and a second cutter member for drilling the communication hole are integrally formed.
According to this feature, the insertion hole and the communication hole can be drilled more accurately collectively while maintaining the positional relationship between the first cutter member and the second cutter member.

The bypass device of the present invention is
The insertion hole is formed in a substantially circular shape, and the communication hole communicates with the insertion hole.
According to this feature, since the insertion hole is formed in a substantially circular shape, the fluid control can surely adhere to the inner peripheral surface of the insertion hole, and the communication hole is located away from the insertion hole. Even in the case of drilling, the first cutter member and the second cutter can be passed by passing the connecting portion that connects the first cutter member and the second cutter member using the portion that connects the communication hole and the insertion hole. The insertion hole and the communication hole can be formed by deeply entering the member into the fluid pipe.

The bypass device of the present invention is
The first cutter member and the second cutter member are characterized by simultaneously perforating the outer peripheral surface of the fluid pipe.
According to this feature, a force can be uniformly applied to the first cutter member and the second cutter member, so that the insertion hole and the communication hole can be accurately formed in the fluid pipe.

The fluid pipe of the present invention is
A pair of bypass devices according to any one of claims 1 to 5 are respectively attached to predetermined portions in the tube axis direction, and the bypass pipes of the pair of bypass devices are connected in a communicating state.
According to this feature, by attaching a pair of bypass devices to predetermined locations of the fluid pipes, the fluid pipes between the bypass devices are blocked by the fluid control while the fluid pipes between the bypass devices are blocked. Can be maintained.

It is sectional drawing which shows the state which has arrange | positioned the pipe joint in Example 1 to the fluid pipe | tube. It is a sectional side view which shows the state which has arrange | positioned the pipe joint to the fluid pipe | tube. It is sectional drawing which shows the state by which the insertion hole and the communicating hole were drilled in the fluid pipe | tube. It is a sectional side view which shows the state by which the insertion hole and the communicating hole were drilled in the fluid pipe | tube. It is sectional drawing which shows attachment of the valve lid which accommodated the fluid control to a branch port. It is sectional drawing which shows the state in which the valve cover was attached to the branch port. It is a sectional side view which shows the state in which the valve lid was attached to the branch port. It is a top view which shows the state which attached the bypass pipe over both pipe joints using two pipe joints attached to the fluid pipe. (A) is a partially broken side view showing a first cutter member and a second cutter member in a modified example, and (b) is a bottom view showing the first cutter member and the second cutter member. 6 is a side sectional view showing a state where an insertion hole and a communication hole are formed in a fluid pipe in Embodiment 2. FIG. It is a sectional side view which shows the state in which the valve cover was attached to the branch port.

  EMBODIMENT OF THE INVENTION The form for implementing the fluid pipe | tube provided with the bypass device and bypass device based on this invention is demonstrated below based on an Example.

  The bypass device according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the fluid pipe 1 according to the first embodiment is made of a resin pipe such as high-density polyethylene formed in a substantially circular shape in cross section, and clean water as a fluid flows inside. For example, in order to replace an existing valve in which a failure such as a failure has occurred from the fluid pipe 1, pipe joints 2 are attached upstream and downstream of the existing valve as shown in FIG. By shutting off the conduit of the fluid pipe 1 with the fluid control 11 attached to the fluid pipe 1, the place where the existing valve is attached to the fluid pipe 1 is temporarily shut off so that the existing valve can be easily replaced. It has become.

  The material of the fluid pipe 1 is not limited to high-density polyethylene, and may be other heat-bondable material made of polyolefin resin or predetermined resin. Furthermore, in this embodiment, the fluid in the fluid pipe 1 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 sewage. It may be a fluid tube through which a fluid in a gas or gas-liquid mixed state flows.

  The bypass device in the present embodiment includes the pipe joint 2 and the fluid control 11 described above, and a bypass pipe 12 and a perforating device 50 described later. Among these, the pipe joint 2 fixedly attached to the outer peripheral surface 1a of the fluid pipe 1 is a so-called split T-shaped pipe attached to the upstream side and the downstream side of the existing valve in the fluid pipe 1 (see FIG. 8). . As shown in FIGS. 1 and 2, these pipe joints 2 are arranged from above with respect to the fluid pipe 1, and have a branch portion 3 that covers the upper side of the outer periphery of the fluid pipe 1, and below the fluid pipe 1. And a cover body 4 that covers the lower side of the outer periphery of the fluid pipe 1. The branch part 3 and the cover body 4 are made of a heat-sealable resin material such as high-density polyethylene.

  The branch part 3 includes an abutting part 3 a that abuts on the outer peripheral surface 1 a in the upper part of the fluid pipe 1. Inside the abutting portion 3a that abuts the outer peripheral surface 1a of the upper part of the fluid pipe 1, a heating wire 3b that generates heat when current flows surrounds an insertion hole 1b that is formed in the fluid pipe 1 to be described later. In addition, the contact portion 3a extends continuously over substantially the entire surface. Each end of the heating wire 3b is connected to a connection portion 6 provided on the outer surface of the branch portion 3 so as to be electrically connectable to an external power source.

  Further, flanges 3 c and 3 c are formed on the branch portion 3 so as to protrude from the contact portion 3 a toward the outer diameter direction of the fluid pipe 1. The width dimension of the flange 3c in the fluid pipe 1 in the pipe axis direction is formed to be substantially the same as the width dimension in the pipe axis direction of the fluid pipe 1 of the branch portion 3. Inside these flanges 3c, heating wires 3d are extended over substantially the entire length of the flanges 3c, 3c in the fluid pipe 1 in the tube axis direction. Each end of the heating wire 3d is connected to a connecting portion 7 provided on the outer surface of the flanges 3c, 3c so as to be electrically connected to an external power source.

  A branch port 3g is formed at an upper portion of the branch portion 3 so as to be directed upward along the tube axis direction of the fluid pipe 1 so as to be substantially orthogonal to the tube axis of the fluid pipe 1. The branch port 3g is formed to penetrate in the vertical direction, and an upper flange 3i is formed at the upper end of the branch port 3g. In addition, a connection hole 3 e is formed through the fluid pipe 1 to the side between the upper end portion of the fluid pipe 1 and the upper flange 3 i in the branch portion 3. One end of the bypass pipe 12 is connected to the connection hole 3e. Note that the bypass pipe 12 in this embodiment is made of a soft resin such as a rubber material or polyethylene.

  On the other hand, as shown in FIGS. 1 and 2, the cover body 4 has a width dimension in the tube axis direction of the fluid pipe 1 that is substantially the same as that of the branch portion 3, and abuts on the outer peripheral surface 1 a in the lower part of the fluid pipe 1. A contact portion 4a is provided. Inside the abutting portion 4a that abuts on the outer peripheral surface 1a in the lower part of the fluid pipe 1, a heating wire 4b that generates heat when a current flows extends continuously over substantially the entire abutting portion 4a. Each end of the heating wire 4b is connected to a connection portion 8 provided on the outer surface of the cover body 4 so as to be electrically connectable to an external power source.

  Further, flanges 4 c and 4 c are formed on the cover body 4 so as to protrude from the contact portion 4 a toward the outer diameter direction of the fluid pipe 1. The width dimension in the tube axis direction of the fluid pipe 1 of these flanges 4 c is formed to be substantially the same as the width dimension in the tube axis direction of the fluid pipe 1 of the cover body 4.

  These flanges 4 c are disposed so as to face the flange 3 c formed in the branch portion 3 by arranging the cover body 4 with respect to the fluid pipe 1 from below. In order to attach the pipe joint 2 configured in this manner to the fluid pipe 1, first, as shown in FIG. 1, the branch portion 3 is disposed from above with respect to the fluid pipe 1, and the cover body 4 is attached to the fluid pipe 1. It arrange | positions with respect to the fluid pipe | tube 1 from the downward direction. At this time, the branch portion 3 is disposed so that the branch port 3g communicates with a planned drilling location of the insertion hole 1b and the communication hole 1c of the fluid pipe 1 (in the present embodiment, the upper portion of the fluid pipe 1).

  Next, both flanges 3c and 4c are tightened with bolts and nuts (not shown), and the flange 3c and the flange 4c are brought into close contact with each other. The contact portions 3a and 4a in the present embodiment are provided with locking claws (not shown). For this reason, by tightening bolts and nuts (not shown) to bring the flanges 3c and 4c into close contact with each other, the contact portions 3a and 4a are elastically deformed toward the fluid pipe 1, and the locking claws are connected to the fluid pipe. 1 bites into the outer peripheral surface 1a. These engaging claws bite into the outer peripheral surface 1 a of the fluid pipe 1, so that the pipe joint 2 is temporarily fixed to the fluid pipe 1 so as not to move.

  Next, a power cable connected to an external power source (not shown) is connected to each connection portion 6, 7 formed in the branch portion 3 and a connection portion 8 formed in the cover body 4, and power is supplied from the external power source for a predetermined time. Supply. The heating wires 3b, 3d, 4b supplied with power generate heat at a high temperature, so that the contact portions 3a, 4a made of resin, the outer peripheral surface 1a of the fluid pipe 1 in contact with the contact portions 3a, 4a, and the flange The space between 3c and 4c is gradually melted by heating.

  The melted contact portions 3a, 4a and the outer peripheral surface 1a of the fluid pipe 1 and the flanges 3c, 4c are mixed with each other, and the heat generation by the heating wires 3b, 3d, 4b is stopped and the temperature is lowered to room temperature. Solidify. In this way, the pipe joint 2 is watertightly attached to the fluid pipe 1 by heat fusion.

  Then, as shown in FIG. 8, the other pipe joint 2 is watertightly attached to the fluid pipe 1 by the same procedure, and the pipe joints 2 and 2 are connected to the upstream side and the downstream side of the existing valve in the fluid pipe 1. Are arranged with their branching ports 3g and 3g facing each other. Next, one end of the bypass pipe 12 is connected to the connection hole 4d of the pipe joint 2 attached to the upstream side of the fluid pipe 1, and the bypass pipe is connected to the connection hole 4d of the pipe joint 2 attached to the downstream side of the fluid pipe 1 The other end of 12 is connected.

  The pipe joint 2 and the fluid pipe 1 can be attached in a water-tight manner by heat fusion, and a general shut-off valve can be used as the fluid control 11 for shutting off the fluid pipe 1 to improve the sealing performance. Therefore, the structure of the bypass device for maintaining the uninterrupted flow state can be simplified, and the manufacture thereof can be facilitated.

  Next, attachment of the fluid control 11 to each pipe joint 2 attached to the fluid pipe 1 will be described. In addition, each pipe joint 2 and the fluid control 11 are the same structure, and only one pipe joint 2 and the fluid control 11 are demonstrated.

  First, as shown in FIG. 3 and FIG. 4, the upper case 35 in which the working valve 36 and the punching device 50 as the punching means in the present invention are disposed is watertightly connected to the upper flange 3i of the branch port 3g. The perforating apparatus 50 is connected to a driving means (not shown) and has a shaft member 51 extending in the axial direction toward the fluid pipe 1 in the branch port 3 g, and a branch port fixed to the tip of the shaft member 51. An annular first cutter member 52 having a sharp perforation blade 52a for drilling a substantially circular insertion hole 1b through 3g, and disposed upstream of the first cutter member 52 in the fluid pipe 1, 1 is mainly composed of a second cutter member 53 provided with a sharp perforation blade 53a that perforates a substantially circular communication hole 1c through a branch port 3g. The second cutter member 53 is formed with a smaller diameter than the first cutter member 52.

  The first cutter member 52 and the second cutter member 53 are integrally configured by connecting the upper ends of each other by the connecting portion 54. Further, the perforation blade 52a that is the front end portion of the first cutter member 52 and the perforation blade 53a that is the front end portion of the second cutter member 53 are located downward in the radial direction of the fluid pipe 1 so that the vertical position is the same. It is extended toward. Next, the perforation of the fluid pipe 1 by the perforating apparatus 50 in which the first cutter member 52 and the second cutter member 53 are configured will be described.

  Since the first cutter member 52 and the second cutter member 53 are integrally configured as described above, the first cutter member 52 and the second cutter member 53 are extended in the axial direction of the shaft member 51, so 52a and 53a are contacted simultaneously.

  Then, the first cutter member 52 and the second cutter member 53 are continuously extended in the axial direction of the shaft member 51, so that the first cutter member 52 is pressed against the outer peripheral surface 1 a in the upper part of the fluid pipe 1. The insertion hole 1b is formed in the tube wall of the fluid tube 1. At the same time, the second cutter member 53 is pressed against the outer peripheral surface 1a in the upper part of the fluid pipe 1 on the upstream side of the insertion hole 1b in the fluid pipe 1, and has a smaller diameter than the insertion hole 1b on the pipe wall of the fluid pipe 1. The communication hole 1c is drilled.

  Note that the sections generated by the first cutter member 52 and the second cutter member 53 having the insertion hole 1b and the communication hole 1c formed in the upper portion of the fluid pipe 1 are the first cutter member 52 and the second cutter member 53, respectively. It is designed to be held inside.

  After the insertion hole 1b and the communication hole 1c are formed by the punching device 50, as shown in FIG. 5, the punching device 50 is pulled up and arranged in the upper case 35, and then the operation valve 36 is operated to branch. Water is stopped at 3 g of mouth. Then, the punching device 50 is removed from the upper end portion of the upper case 35, and the outer cover 70 is watertightly connected to the upper end portion of the upper case 35 as shown in FIG. The outer cover 70 is provided with a pair of openings 71, 71 facing sideways, and these openings 71, 71 are watertightly closed by lid bodies 72, 72 and bolts / nuts 73.

  An arm (not shown) is attached to an upper end (not shown) of the outer cover 70 so as to be movable up and down. At the lower end of the arm, a valve lid 60 in which a fluid control 11 for previously blocking or opening the conduit of the fluid pipe 1 through the insertion hole 1 b is provided via an intermediate member 75. The valve lid 60 is disposed in the outer cover 70 when the arm is attached to the upper end portion of the outer cover 70. The arm and the upper end of the outer cover 70 are watertightly held by a rubber body (not shown). Furthermore, the intermediate member 75 is formed in a cylindrical shape, and a rotation operation portion 63a described later is inserted and disposed therein (see FIG. 6).

  After the outer cover 70 is connected to the upper end of the upper case 35 in a watertight manner, the branch port 3g and the outer cover 70 are connected by a communication member such as a hose or a bypass pipe (not shown) having an on-off valve. Then, an air valve (not shown) provided at the upper end portion of the outer cover 70 is opened, and the working valve 36 is operated to open the branch port 3g, whereby the fluid pipe 1 is formed in the outer cover 70 and the branch port 3g. Fill with water that was flowing inside.

  After the inside of the outer cover 70 and the inside of the branch port 3g are filled with clean water, the air valve is closed, the on-off valve is opened, and the branch port 3g and the outer cover 70 are communicated with each other. The internal water pressure and the water pressure in the branch port 3g are always kept constant, and the valve lid 60 is pressed in an indefinite water state by a pressing means (not shown) attached in advance to the outer cover 70, so that the top of the branch port 3g The valve lid 60 is assembled in a sealed manner to the flange 3i.

  At this time, the inside of the branch port 3g and the inside of the outer cover 70 are filled with the clean water flowing in the fluid pipe 1 and have the same water pressure. Therefore, when the valve lid 60 is assembled to the upper flange 3i, The drag received by the valve lid 60 from the flowing water can be kept small. After the valve lid 60 is assembled to the upper flange 3i, the lid bodies 72, 72 are removed, and the intermediate member 75 is separated from the valve lid 60 through the openings 71, 71.

  As shown in FIGS. 5 and 6, the valve lid 60 has an outer diameter smaller than the inner diameter of the branch port 3g, and is branched by an O-ring 61 provided along the outer periphery of the lower portion of the valve lid 60. It is inserted in a watertight manner along the inner peripheral surface of the mouth 3g. Further, the position of the valve lid 60 is fixed by screwing a fixing bolt 62 from the outside of the branch port 3g so that the valve lid 60 is fixed. The fixing bolt 62 is screwed into the valve lid 60 to regulate the valve lid 60 in the vertical direction.

  As shown in FIG. 6, the rotation screw 63 is rotatably attached to an insertion hole 64 formed in the top of the valve lid 60 and has an upper end projecting outside the valve lid 60. The holding plate 65 is fixed to the upper end surface of the valve lid 60 with a bolt 66 and prevents the rotation screw 63 from being pulled out. With the above configuration, the rotating screw 63 is rotatable in both forward and reverse directions with respect to the valve lid 60 but does not move up and down. Reference numeral 63b denotes a screw portion having a peripheral surface screwed over substantially the entire length except for the upper end portion of the rotary screw 63.

  As shown in FIGS. 5 and 6, the screw top 67 is fitted in the guide groove 69 formed in the upper end portion of the fluid control 11 and is screwed into the screw portion 63 b, and the upper end portion of the rotating screw 63. The screw part 63b rotates according to the rotation of the rotation operation part 63a formed in the above, so that the fluid control 11 can move up and down following the screw top 67 screwed along the screw part 63b.

  As shown in FIG. 7, an insertion hole 68 into which the screw portion 63 b of the rotating screw 63 is inserted is formed in the fluid control 11. In addition, overhanging portions 11a, 11a along the vertical direction on the upstream and downstream outer surfaces of the fluid control 11 are slidable along the groove 60a provided on the inner surface of the valve lid 60 or the branch port 3g. It is extended to. Since the overhanging portions 11a and 11a configured in this manner are in contact with the groove portion 60a, the rotation of the damping fluid 11 with the rotation of the rotating screw 63 is restricted, so that the damping fluid 11 is bent or twisted. It can be prevented.

  By pressing the valve lid 60 to which the fluid control 11 is attached in this manner toward the branch port 3g by the pressing means attached in advance to the outer cover after the work valve 36 is opened, The valve lid 60 is assembled in a sealed manner to the upper flange 3 i of the branch port 3 g while suppressing the drag received by the valve lid 60 from the water flowing in the pipe 1, and the fixing bolt 62 is screwed into the valve lid 60.

  Further, the on-off valve of the communication member is closed, and the upper case 35 and the outer cover 70 are removed from the upper flange 3i. Finally, the ring-shaped flange 56 is inserted into the valve lid 60, and the flange 56 and the branch port 3g are fastened by the bolt and nut 57.

  Thereafter, as shown in FIGS. 6 and 7, the fluid control 11 moves downward by the rotation of the rotation operation portion 63a by a handle (not shown) so that the inner peripheral surface of the fluid pipe 1 and the inner peripheral surface of the insertion hole 1b are moved. While being elastically deformed over the entire circumference, the fluid pipe 1 is shut off by contacting water tightly, and the pipe of the fluid pipe 1 can be opened by moving upward by the rotation of the rotation operation part 63a by the handle. It becomes.

  Then, as shown in FIG. 8, the insertion hole 1 b and the communication hole 1 c are also drilled in the other pipe joint 2 using the punching device 50, and the two pipe joints 2 and 2 are connected via the bypass pipe 12. In addition, the valve lid 60 in which the control fluid 11 is disposed is assembled to the upper flange 3i of the branch port 3g, so that the conduit of the fluid pipe 1 can be opened and closed by the control fluid 11.

  On the other hand, the bypass pipe 12 connected to the connection hole 3e is independent of the insertion hole 1b into which the fluid control 11 is inserted, regardless of whether the fluid pipe 1 is opened or closed by the fluid control 11 described above. Water always flows from the inside of the fluid pipe 1 through the communication hole 1c formed in the pipe. A squeeze tool 13 for restricting the amount of clean water flowing through the bypass pipe 12 by clamping the pipe wall of the bypass pipe 12 in the radial direction is attached to a predetermined portion of the bypass pipe 12 in the present embodiment. ing. For this reason, when the pipe of the fluid pipe 1 is opened, the inside of the bypass pipe 12 is clamped by the squeeze tool 13 so that clean water can be supplied only by the fluid pipe 1 without passing through the bypass pipe 12. ing.

  Furthermore, in the present embodiment, the bypass pipe 12 is made of a soft resin such as rubber material or polyethylene, and the flow rate of the clean water flowing through the bypass pipe 12 by clamping the predetermined portion of the bypass pipe 12 with the squeeze tool 13. Although the bypass pipe is made of metal, hard resin, etc., the flow rate of clean water flowing through the bypass pipe is adjusted by attaching a valve that can open and close the bypass pipe to a predetermined location of the bypass pipe 12. You may make it adjust.

  By doing in this way, when exchanging the said existing valve between both pipe joints 2 in fluid pipe 1, it becomes possible to close the channel between both control fluids 11 and 11. And since the clean water which flows in the fluid pipe 1 can bypass between both the control fluids 11 and 11 via the bypass pipe 12, in the general household etc. which are the connection destinations of the fluid pipe 1, it does not cut off water Clean water can be used.

  In this embodiment, as described above, the first cutter member 52 and the second cutter member 53 are disposed close to each other, and the first cutter member 52 and the second cutter are connected via the connecting portion 54 that connects both upper ends. Although the member 53 is integrally formed, as a modification of the present embodiment, as shown in FIGS. 9A and 9B, it is interposed between the first cutter member 52 and the second cutter member 53. A third cutter member 55 in which a linear perforation blade 55a is formed from the connecting portion 54 so that the vertical height positions thereof are the same as the perforation blades 52a, 53a of the first cutter member 52 and the second cutter member 53. May be extended.

  In this case, the first cutter member 52 and the second cutter member 53 drill the insertion hole 1b and the communication hole 1c in the tube wall of the fluid pipe 1, and at the same time, the third cutter member 55 is formed in the tube wall of the fluid pipe 1. A slit-like slit hole (not shown) that allows the insertion hole 1b and the communication hole 1c to communicate with each other is formed. For this reason, the first cutter member 52 and the second cutter member 53 make the insertion hole 1b and the communication hole 1c while penetrating deeply into the fluid pipe 1 by allowing the connecting portion 54 to pass through the slit hole. Can do. Instead of the above-described modification, for example, the insertion hole and the communication hole may be communicated by arranging the first cutter member and the second cutter member close to each other so that the respective drilling blades are in contact with each other. Alternatively, the second cutter member formed in a substantially arc shape having a cutout part in which the drilling blade is partially cut out with respect to the first cutter member in which the drilling blade is formed in a substantially annular shape is provided with the cutout part. The insertion hole and the communication hole may be communicated with each other by being arranged close to the perforating blade of the first cutter member.

  As described above, in the bypass device according to the present embodiment, at least the perforation device 50 that perforates the outer peripheral surface 1a of the fluid pipe 1 with the insertion hole 1b for inserting the fluid control 11 that blocks the flow path of the fluid pipe 1 is provided. The perforating apparatus 50 is provided with a communication hole 1c for communicating the fluid pipe 1 and the bypass pipe 12 in the outer peripheral surface 1a of the fluid pipe 1 independently of the insertion hole 1b. Since the insertion hole 1b is independent from the communication hole 1c at the time of blocking, the fluid control 11 is interfered with the communication hole 1c for the bypass pipe 12 by using the fluid control 11 in accordance with the insertion hole 1b. Therefore, it is sufficient if the flow path of the fluid pipe 1 can be blocked, and a general-purpose shut-off valve can be used, and the sealing performance of the fluid control 11 can be improved when the flow path is blocked. Moreover, the magnitude | size and shape of the communicating hole 1c can be set arbitrarily.

  Further, since the drilling device 50 drills the insertion hole 1b and the communication hole 1c on the same side of the outer peripheral surface 1a of the fluid pipe 1, the drilling of the insertion hole 1b and the communication hole 1c changes the direction of the drilling device 50. Since it can be performed from the same direction without any problems, the insertion hole 1b and the communication hole 1c can be easily formed.

  Further, since the punching device 50 is configured integrally with the first cutter member 52 for drilling the insertion hole 1b and the second cutter member 53 for drilling the communication hole 1c, the first cutter member 52 The insertion hole 1b and the communication hole 1c can be drilled more accurately collectively while maintaining the positional relationship with the second cutter member 53.

  In addition, the insertion hole 1b is formed in a substantially circular shape, and as shown in the modification, the communication hole 1c communicates with the insertion hole 1b, so that the fluid control 11 is in close contact with the inner peripheral surface of the insertion hole 1b. In addition, even when the communication hole 1c is formed at a position distant from the insertion hole 1b, the connecting portion 54 that connects the first cutter member 52 and the second cutter member 53 is connected to the communication hole 53. The first cutter member 52 and the second cutter member 53 are moved deeply into the fluid pipe 1 by passing through the portion that communicates with the insertion hole 52, and the insertion hole 1b and the communication hole 1c are formed. can do.

  Moreover, since the 1st cutter member 52 and the 2nd cutter member 53 perforate the outer peripheral surface 1a of the fluid pipe 1 simultaneously, since force can be uniformly applied to the 1st cutter member 52 and the 2nd cutter member 53, The insertion hole 1b and the communication hole 1c can be accurately drilled in the fluid pipe 1.

  In addition, the bypass devices are attached in pairs to predetermined locations in the pipe axis direction of the fluid pipe 1, and the bypass pipes 12 of the pair of bypass devices are connected to each other in a communicating state. By attaching a pair of devices, the fluid pipe 1 between these bypass devices can be maintained by the control fluid 11 while maintaining a continuous fluid flow state via the bypass tube 12.

  Next, a bypass device according to a second embodiment will be described with reference to FIGS. In addition, the same structure as the said Example is abbreviate | omitted. As shown in FIGS. 10 and 11, the upper part of the branch part 3 has a first branch port 3j that extends upward along the tube axis direction of the fluid pipe 1 so as to be substantially orthogonal to the pipe axis of the fluid pipe 1. Is formed. A second branch port 3k having substantially the same configuration as that of the first branch port 3j is formed on the upstream side of the fluid pipe 1 in the branch portion 3 from the first branch port 3j.

  The first branch port 3j and the second branch port 3k have a common upper flange 3i at the upper end. Further, a connection hole 3m is formed through the second branch port 3k between the upper end portion of the fluid pipe 1 and the upper flange 3i in the radial direction of the fluid pipe 1. Further, the first cutter member 52 ′ and the second cutter member 53 ′ in the present embodiment have substantially the same diameter. The first cutter member 52 ′ and the second cutter member 53 ′ are connected to the shaft member 51 via a bifurcated attachment 58 fixed to the tip of the shaft member 51.

  With the first cutter member 52 ′ and the second cutter member 53 ′ attached to the shaft member 51 in this way, the first cutter member 52 ′ and the second cutter member 53 ′ extend in the axial direction of the shaft member 51. By doing so, the first cutter member 52 ′ is inserted into the first branch port 3j, and the insertion hole 1b is formed in the tube wall of the fluid pipe 1 by the punching blade 52a ′. At the same time, the second cutter member 53 ′ is inserted into the second branch port 3 k, and a communication hole 1 c ′ having substantially the same diameter as the insertion hole 1 b is formed in the tube wall of the fluid pipe 1 by the piercing blade 53 a ′.

  After the insertion hole 1b and the communication hole 1c ′ are drilled in the fluid pipe 1, the drilling device 50 is pulled up, and then the valve lid 60 ′ in which the fluid control 11 is disposed is attached to the first branch port 3j. . In addition, the valve lid 60 ′ of the present embodiment is provided with a lid body 60 b for sealingly sealing the second branch port 3 k on the upstream side of the fluid pipe 1. For this reason, after the valve lid 60 ′ is attached to the first branch port 3j, the ring-shaped flange 56, the first branch port 3j, and the second branch port 3k are fastened with bolts and nuts 57. The first branch port 3j and the second branch port 3k are closed.

  After that, as shown in FIG. 11, the fluid control 11 moves downward by the rotation of the rotation operation portion 63a by a handle (not shown), thereby being elastically deformed on the inner peripheral surface of the fluid pipe 1 and being in watertight contact with the fluid pipe 1 1 and the fluid pipe 1 can be opened by moving upward by the rotation of the rotation operation portion 63a by the handle.

  Further, since the communication hole 1c ′ is formed in the fluid pipe 1 with substantially the same diameter as the insertion hole 1b, the communication hole 1c ′ is formed above the bypass pipe 12 between the two pipe joints 2 and 2 attached to a predetermined portion of the fluid pipe 1. The flow rate of water can be made close to the flow rate of clean water in the fluid pipe 1 in a state where the flow path is open.

  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 said Example, although the branch part 3 and the cover body 4 were heat-seal | fused, the attachment to the fluid pipe | tube 1 of the pipe joint 2 was performed, For example, flange 3c, 4c was tightened Then, the fitting of the pipe joint 2 to the fluid pipe 1 may be performed by the frictional force generated in the contact portions 3a, 4a and the outer peripheral surface 1a of the fluid pipe 1.

  Moreover, in the said Example, although the pipe joint 2 was comprised by the branch part 3 and the cover body 4, if it can adhere to the fluid pipe | tube 1 sealing the circumference | surroundings of the insertion hole 1b and the communicating hole 1c, it will be pipe | tube. The joint 2 may be composed of only the branch portion 3.

  Moreover, in the said Example, although the branch part 3 and the cover body 4 which comprise the pipe joint 2 were comprised by the resin material which can be heat-sealed, such as a high density polyethylene, for example, a part of these branch parts or a cover body or You may make it improve the intensity | strength of a pipe joint by comprising all with a metal.

  Moreover, in the said Example, although the perforation blade 52a, 53a of the 1st cutter member 52 and the 2nd cutter member 53 was pressed on the outer peripheral surface 1a of the fluid pipe | tube 1, the insertion hole 1b and the communicating hole 1c were drilled, The first cutter member 52 and the second cutter member 53 are individually rotationally driven by the power of a drive motor or the like to cut the tube wall of the fluid pipe 1 and to form the insertion hole 1b and the communication hole 1c. Also good.

  Moreover, in the said Example, although the fluid pipe | tube 1 is resin pipes, such as a high-density polyethylene formed in the cross sectional view substantially circular shape, the material of the fluid pipe | tube used as the object to which the bypass apparatus which concerns on this invention is attached is The resin pipe is not limited to the above-described embodiment, and may be a resin pipe made of another material such as vinyl chloride, or may be a metal pipe other than resin. When the fluid pipe is a metal pipe, the first cutter member 52 and the second cutter member 53 are rotationally driven by the power of the drive motor or the like to cut the pipe wall of the fluid pipe.

  In the above-described embodiment, the insertion hole 1b and the communication hole 1c are formed in a circular shape in the fluid pipe 1. However, the shape of the insertion hole 1b and the communication hole 1c is not limited to a circle, and may be a quadrangle or the like. .

DESCRIPTION OF SYMBOLS 1 Fluid pipe 1a Outer peripheral surface 1b Insertion hole 1c, 1c 'Communication hole 2 Pipe joint 11 Fluid control 12 Bypass pipe 50 Punching device (punching means)
52, 52 'first cutter member 53, 53' second cutter member 54 connecting portion

Claims (6)

A bypass device that maintains an uninterrupted flow state of a fluid pipe via a bypass pipe connected to a pipe joint,
And a perforating means for perforating an outer peripheral surface of the fluid pipe for inserting a control fluid for blocking a flow path of the fluid pipe, wherein the perforating means communicates the fluid pipe and the bypass pipe. A bypass device characterized in that a communication hole to be formed is formed in an outer peripheral surface of the fluid pipe independently of the insertion hole.   The bypass device according to claim 1, wherein the perforating means perforates the insertion hole and the communication hole on the same side of the outer peripheral surface of the fluid pipe.   The said punching means is comprised integrally with the 1st cutter member which drills the said insertion hole, and the 2nd cutter member which drills the said communicating hole. Bypass device.   The bypass device according to claim 3, wherein the insertion hole is formed in a substantially circular shape, and the communication hole communicates with the insertion hole.   5. The bypass device according to claim 3, wherein the first cutter member and the second cutter member simultaneously perforate an outer peripheral surface of a fluid pipe.   A bypass device according to any one of claims 1 to 5, wherein a pair of bypass devices are respectively attached to predetermined locations in the tube axis direction, and the bypass pipes of the pair of bypass devices are connected in a communicating state. tube.

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