JP2018128140A - Connection unit for changing flow passage and flow passage change method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection unit for changing a flow passage, capable of shortening a time required from start of flow passage change work to completion thereof.SOLUTION: A connection unit 100 for changing a flow passage includes: a housing storing a midway region of an existing pipe PE10 and an end region of a new pipe PN20, wherein the existing pipe PE10 and the new pipe PN20 are arranged adjacently; and a cutting member 120 arranged oppositely to the midway region of the existing pipe PE10, and configured to partially cut the midway region of the existing pipe PE10. The connection unit also includes a discharge port 112i configured to communicate fluid between the end region of the new pipe PN20 and one or the other or both of the midway regions of the existing pipe PE10 cut by the cutting member 120, and discharge a part of the midway region of the existing pipe PE10 cut by the cutting member 120 to the outside of the housing. The connection unit further includes a passage part 122c configured to hold flow of fluid flowing in the existing pipe PE10 while the cutting member 120 cuts the midway region of the existing pipe PE10. The cutting member 120 is configured to move toward the discharge port 112i to close the discharge port 112i.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a flow path changing connection unit and a flow path changing method for a pipe through which a fluid flows, and in particular, allows fluid flowing in an existing pipe to communicate between an intermediate area of the existing pipe and an end area of the new pipe. The present invention relates to a flow path changing connection unit and a flow path changing method.

  Conventionally, when pipes are aging, when replacing pipes, the pipe located at the root of the tributary part is perforated in order to avoid stopping the entire pipe and shut off only the necessary tributary part. The bypass operation is performed in a state where the bag is inserted into the pipe and the bag is inflated by the pump to stop the water (for example, see Patent Document 1).

  In the water supply facilities of real estate where users occupy multiple sections such as apartment houses and buildings, tap water is conventionally re-supplied from the receiving tank to each section after storing the tap water in the receiving tank. So that the piping is. However, there are some cases where maintenance work such as regular cleaning of the receiving tank is not performed sufficiently to maintain hygiene, and in recent years the use of the receiving tank has been deprecated, and A form in which tap water is directly supplied from a pipe to each section by a pressure-increasing direct connection pump has been used. In low-rise buildings and the like, there is a case where the pressure-increasing direct connection pump is not used by using only the supply pressure of tap water.

Japanese Patent Laying-Open No. 2005-147228 (refer to claim 1 in particular)

  After storing the tap water in the receiving tank, change the system from supplying the tap water to each section to the one that supplies the tap water to each section from the water main with a pressure-increasing direct connection pump. Therefore, it is necessary to replace the piping around the water receiving tank with piping via a pressure-increasing direct connection pump. Since the water receiving tank is located between each section and the water main (pipe for water supply), in order to perform such replacement, the water main and the water receiving tank It is necessary to change the flow path of tap water after water is stopped between the two, and it is necessary to change the flow path for a certain length of time. For this reason, even if it is necessary to make advance adjustments of the schedule of the users of each section as to when to change the flow path, the flow path change work will not be completed in a short time. There was a problem that it took.

  Such a situation is not limited to the supply of tap water to each section. For example, the flow path change work such as replacement of an aged pipe used in a factory does not end in a short time. There was a problem that it took time to adjust the department and had to continue using the old piping.

  Therefore, the present invention solves the problems of the prior art as described above, that is, the object of the present invention is to provide a flow path changing connection that shortens the time required from the start to the end of the flow path changing work. It is to provide a flow path changing method using a unit and a flow path changing connection unit.

  The invention according to claim 1 is configured such that an existing pipe and a new pipe are arranged adjacent to each other to accommodate a middle area of the existing pipe and an end area of the new pipe; At least a cutting member that partially cuts a midway region of the existing pipe, and a fluid between one, the other, or both of the midway regions of the existing pipe that is cut by the cutting member and the end region of the new pipe A flow path changing connection unit, wherein the casing includes a discharge port for discharging a part of a middle area of the existing pipe cut by the cutting member to the outside of the casing. The cutting member includes a passage portion for maintaining the flow of fluid in the existing pipe while cutting the midway region of the existing pipe, and the cutting member moves to the discharge port and opens the discharge port. By closing, it solves the problems mentioned above. That.

  In the invention according to claim 2, in addition to the configuration of the flow path changing connection unit according to claim 1, there is provided a closing member that closes one of the intermediate regions of the existing pipe that is cut by the cutting member. The above-described problems are further solved by being provided adjacent to the cutting member.

  In the invention according to claim 3, in addition to the configuration of the flow path changing connection unit according to claim 1 or 2, the cutting member includes a lower cutting portion that cuts a midway region of the existing pipe, and An upper closing part disposed in contact with the lower cutting part, wherein the lower cutting part passes through the outlet, the upper closing part closes the outlet, and the lower cutting part is the upper part By separating from the closed portion, the above-described problems are further solved.

  The invention according to claim 4 is provided by arranging the existing pipe and the new pipe adjacent to each other and housing the middle area of the existing pipe and the end area of the new pipe, and facing the middle area of the existing pipe. At least a cutting member that cuts a midway area of the existing pipe, and the casing has a discharge port for discharging a part of the midway area of the existing pipe cut by the cutting member to the outside of the casing A flow path changing method using a flow path changing connection unit that includes a passage section that maintains a flow of fluid in the existing pipe while the cutting member cuts a midway region of the existing pipe. The above-described problem is solved by including a moving step in which the cutting member moves to the discharge port, and a closing step in which the cutting member closes the discharge port after the moving step. is there.

  In the flow path changing connection unit and the flow path changing method using the flow path changing connection unit according to the present invention, the existing pipe and the new pipe are arranged adjacent to each other to accommodate the middle area of the existing pipe and the end area of the new pipe. By providing at least a casing and a cutting member that is disposed opposite to the midway area of the existing pipe and partially cuts off the midway area of the existing pipe, the gap between the midway area of the existing pipe and the end area of the new pipe In addition to allowing fluid to communicate, the following unique effects can be achieved.

  According to the flow path changing connection unit according to the first aspect of the present invention, the housing includes the discharge port for removing a part of the middle region of the existing pipe cut by the cutting member, and the cutting member By moving to the discharge port and closing the discharge port, the operation from the removal of a part of the existing pipe halfway area to the sealing of the housing becomes easier, so the flow path change work starts The time required from the end to the end can be further shortened. In addition, the cutting member includes a passage portion that maintains the flow of the fluid in the existing pipe while cutting the middle area of the existing pipe, so that the fluid in the existing pipe can be used even during the flow path changing operation. For example, in the case of tap water, the water shut-off time can be eliminated so that the fluid supply to the person can be sustained.

  According to the flow path changing connection unit of the invention according to claim 2, in addition to the effect of the invention according to claim 1, the flow path changing connection unit is a halfway area of the existing pipe cut by the cutting member By having a closing member that closes one of the cutting member adjacent to the cutting member, it is possible to perform in a short time from cutting the middle area of the existing pipe to closing one of the cut middle areas, The flow path changing operation can be completed in a shorter time.

  According to the flow path changing connection unit according to the third aspect, in addition to the effect exerted by the invention according to the first or second aspect, the cutting member includes a lower cutting portion and a lower portion that cut an intermediate region of the existing pipe An upper closing portion disposed in contact with the cutting portion, the lower cutting portion passes through the discharge port, the upper closing portion closes the discharge port, and the lower cutting portion is separated from the upper closing portion. Since the lower cut portion can be taken out of the flow path changing connection unit, the lower cut portion can be reused, and the manufacturing cost of the flow path changing connection unit can be reduced.

  According to the flow path changing method using the flow path changing connection unit according to the present invention, the flow path changing connection unit has a discharge port for removing a part of the midway area of the existing pipe cut by the cutting member. Equipped with the cutting member moving to the discharge port, the cutting member closes the discharge port, so that the operation from the removal of part of the existing area of the existing pipe to the sealing of the housing is simple. Therefore, the time required from the start to the end of the flow path changing work can be shortened. In addition, the cutting member includes a passage portion that maintains the flow of the fluid in the existing pipe while cutting the middle area of the existing pipe, so that the fluid in the existing pipe can be used even during the flow path changing operation. For example, in the case of tap water, the water shut-off time can be eliminated so that the fluid supply to the person can be sustained.

It is a figure which shows the state which made the fluid communicate between the midway area | region of an existing pipe, and the edge part area | region of a new installation pipe | tube by the flow-path change connection unit which concerns on one Embodiment of this invention. FIG. 2 is a top view and a side view of the flow path changing connection unit, existing pipe, and new pipe shown in FIG. 1. It is a figure for demonstrating arrange | positioning the middle area | region of an existing pipe, and the edge part area | region of a new pipe adjacently. It is an assembly perspective view of the connection unit for channel change concerning one embodiment of the present invention. The top view of the flow path changing connection unit according to an embodiment of the present invention and the process of cutting the existing pipe by the flow path changing connection unit, closing the discharge port, and closing one of the cut midway areas of the existing pipe. It is sectional drawing demonstrated. It is sectional drawing explaining the process of cutting | disconnection of the existing pipe | tube by the flow-path change connection unit which concerns on one Embodiment of this invention, closure of a discharge port, and one obstruction | occlusion of the halfway area | region where the existing pipe | tube was cut | disconnected. It is a top view of the lower housing | casing of the connection unit for flow-path change which concerns on one Embodiment of this invention. It is a figure explaining the process switched from use of a water-receiving tank to use of a pressure-increasing direct connection pump using the flow path changing connection unit according to an embodiment of the present invention. As a 1st modification, it is sectional drawing (corresponding figure of Drawing 6 (C)) showing a three-way communication state where fluid communicates between both the middle areas of an existing pipe and the end part area of a new pipe. It is a schematic diagram which shows the cutting member which has a groove-shaped passage part as a 2nd modification. It is sectional drawing (corresponding to FIG. 9) showing another aspect of a three-way communication state as a third modification. As a 4th modification, it is sectional drawing (corresponding figure of Drawing 6 (C)) which shows the other way of the two-way communication state where fluid communicates between one end part of an existing pipe and the end part field of a new pipe is there. It is sectional drawing (corresponding to FIG. 9) showing still another aspect of the three-way communication state as a fifth modification.

  The flow path changing connection unit according to the present invention is configured such that the existing pipe and the new pipe are arranged adjacent to each other, and the casing that accommodates the middle area of the existing pipe and the end area of the new pipe, and the middle area of the existing pipe are arranged oppositely. And at least a cutting member that partially cuts the midway area of the existing pipe, the housing has a discharge port that removes a part of the existing pipe cut by the cutting member, and the cutting member is a midway area of the existing pipe A passage part that maintains the flow of fluid in the existing pipe while cutting the pipe, and the cutting member moves to the discharge port to close the discharge port, so that the middle part of the existing pipe and the end of the new pipe Any specific embodiment may be used as long as fluid can be communicated with the region. Further, the flow path changing method using the flow path changing connection unit of the present invention includes a case in which an existing pipe and a new pipe are arranged adjacent to each other to accommodate a middle area of the existing pipe and an end area of the new pipe, It is a construction method that uses a flow path changing connection unit that includes at least a cutting member that is disposed opposite to a midway region of a pipe and that partially cuts off the midway region of an existing pipe, and the casing of the existing pipe cut by the cutting member Using a flow path changing connection unit that includes a discharge port that removes a part of the midway region, and the cutting member has a passage portion that maintains the flow of fluid in the existing tube while cutting the midway region of the existing tube A cutting process in which the cutting member moves to the discharge port, and a closing step in which the cutting member closes the discharge port after the moving step, so that an intermediate region of the existing pipe and an end region of the new pipe are provided. If fluid can be communicated between Specific embodiments may be any one.

  For example, the existing pipe and the new pipe may be made of metal or resin, for example, vinyl chloride. Further, the existing pipe and the new pipe are not in an orthogonal arrangement relationship and may have any angle. In addition, the midway area of the existing pipe and the end area of the new pipe may be located on the same plane, or may not be located on the same plane. The cutting of the intermediate region of the existing pipe may be realized by the cutting member having a cutting blade, may be realized by shearing by the cutting member, or the cutting member emits a laser beam. It may be realized by irradiating. Further, the housing may be made of metal or reinforced plastic, for example. The housing may be formed by joining the lower housing and the upper housing, and the lower housing and the upper housing may be made of the same material or different materials. The arrangement relationship between the lower housing and the upper housing is arbitrary. For example, the upper housing does not need to be located above the lower housing, and the upper housing is located below the lower housing. It may be. In other words, in the present invention, expressions indicating directions such as “up”, “down”, “right”, “left”, “front”, “back” are not absolute but relative. It is appropriate when each part has the posture shown in the figure, but when the posture changes, it should be interpreted according to the change in the posture.

  FIG. 1 is a perspective view showing a state where a midway area of an existing pipe and an end area of a new pipe are communicated with each other by a flow path changing connection unit 100 according to an embodiment of the present invention. Hereinafter, the flow path changing connection unit 100 may be abbreviated as the connection unit 100 in some cases. In other words, FIG. 1 shows a state in which the connection unit 100 according to the embodiment of the present invention communicates a part PE11 in the middle region of the existing pipe PE10 (see FIG. 3) and the end region of the new pipe PN20. FIG. 2A is a top view corresponding to FIG. 1, and FIG. 2B is a side view corresponding to FIG.

  Reference numerals PE11, PE12, and PE13 indicate a part of the middle region of the existing pipe PE10. Before the connection unit 100 was installed, some PE11, PE12, and PE13 in the middle region of the existing pipe PE10 were connected together as the existing pipe PE10. A fluid may flow through the existing pipe PE10. When the fluid is flowing through the existing pipe PE10, in the state shown in FIG. 1, the fluid flowing through the part PE11 in the middle region of the existing pipe PE10 can flow to the end region of the new pipe PN20, and The opposite is also possible. The fluid includes liquid, gas, viscoelastic fluid and the like. In the following description, tap water supplied mainly by water supply will be described as a main example of fluid. However, the fluid in the present invention is not limited to tap water.

  The connection unit 100 has a housing 110. In FIG. 1 and FIG. 2, the housing 110 included in the connection unit 100 includes an upper housing 111 and a lower housing 112. The lowermost opening of the upper housing 111 and the uppermost opening of the lower housing 112 have a corresponding shape, and the lowermost opening of the upper housing 111 and the uppermost opening of the lower housing 112. By aligning the positions, the integrated housing can be obtained. In other words, the upper housing 111 can be joined to the lower housing 112. A bottom closing member 130 may be attached to the lower housing 112 as necessary. As will be described later, a discharge port 112i (see FIGS. 4, 5, 6, and 7) is provided at the bottom of the lower housing 112, and the discharge port 112i is closed by the cutting member 120 (see FIG. 4). The casing 110 of the connection unit 100 is hermetically sealed. However, in order to make the sealing state of the casing 110 of the connection unit 100 more reliable and more continuous, the bottom closing member 130 is provided with the lower casing 112. It may be attached to the lower surface of the.

  When the connection unit 100 is installed, a first existing pipe lower connection portion that projects below the existing pipe PE10 in front of and behind the lower housing 112 (corresponding to diagonally right rear and diagonally left front with respect to FIG. 1). 112a and the 2nd existing pipe lower part connection part 112b are arrange | positioned. Therefore, the existing pipe PE10 is supported from below by the lower housing 112. The first existing pipe lower connection part 112a and the second existing pipe lower connection part 112b have a bowl shape, in other words, a saddle band shape, and when the cross-sectional shape of the existing pipe PE10 is circular, The concave portions of the first existing pipe lower connection part 112a and the second existing pipe lower connection part 112b have a semi-cylindrical shape corresponding to the diameter of the existing pipe PE10, and are also bladed fastened by fastening means such as bolts 201 and nuts. Of the first existing pipe lower connection part 112a and the second existing pipe lower connection part 112b, respectively. It is illustrated that it extends horizontally from the top of the recess to the left and right. The fastening part of the first existing pipe lower connection part 112a is fastened with the fastening part of the first existing pipe upper connection part 111a described later, and the fastening part of the second existing pipe lower connection part 112b is the second existing pipe upper part described later. It is fastened with the fastening part of the connection part 111b.

  Further, when installing the connection unit 100, the new pipe lower connection portion 112c protruding to the right of the lower housing 112 is disposed under the new pipe PN20. Accordingly, the new pipe PN20 is supported from below by the lower housing 112. Similar to the first existing pipe lower connection part 112a and the second existing pipe lower connection part 112b, the new pipe lower connection part 112c has a saddle band shape when the sectional shape of the new pipe is circular. The concave portion of the new pipe lower connection portion 112c has a semi-cylindrical shape corresponding to the diameter of the new pipe PN20, and the fastening portion extends horizontally from the upper portion of the concave portion of the new pipe lower connection portion 112c.

  After the first existing pipe lower connection part 112a, the second existing pipe lower connection part 112b and the new pipe lower connection part 112c are arranged under the existing pipe PE10 and the new pipe PN20, the upper casing is placed on the lower casing 112. 111 is arranged. The first existing pipe upper connection part 111a and the second existing pipe upper connection part 111b projecting forward and backward of the upper casing 111 are saddles like the first existing pipe lower connection part 112a and the second existing pipe lower connection part 112b. It has a band shape, the recesses of the first existing pipe upper connection part 111a and the second existing pipe upper connection part 111b have a semi-cylindrical shape corresponding to the diameter of the existing pipe, and the fastening part is the first existing pipe The pipe upper connection part 111a and the second existing pipe upper connection part 111b extend horizontally from the lower part to the left and right. Similarly, a new pipe upper connection part 111c protrudes to the right of the upper casing 111, has a saddle band shape like the new pipe lower connection part 112c, and has a recess in the new pipe upper connection part 111c. Has a semi-cylindrical shape corresponding to the diameter of the new pipe PN20, and the fastening part extends horizontally from the lower part of the concave part of the new pipe upper connection part 111c.

  When the upper casing 111 is installed on the lower casing 112, the positions of the screw holes of the fastening portions extending horizontally from the first existing pipe lower connection section 112a and the first existing pipe upper connection section 111a to the left and right are determined. The bolt 201 can be inserted from one of the screw holes, and the nut can be installed on the opposite surface and fastened. In addition, the screw holes of the fastening portions extending horizontally from the second existing pipe lower connection portion 112b and the second existing pipe upper connection portion 111b are aligned with each other, and the bolt is inserted from one of the screw holes. Insert and tighten the nuts on the opposite side. The screw holes of the fastening portions extending horizontally from the new pipe lower connection portion 112c and the new pipe upper connection portion 111c are aligned with each other, and bolts are inserted from one of the screw holes, Can be installed on the opposite side and fastened.

  As described above, the upper casing 111 and the lower casing 112 are integrated with the upper casing 111 and the lower casing 112 in a state in which the middle area of the existing pipe PE10 and the end area of the new pipe PN20 are accommodated. The In other words, the upper casing 111 is joined to the lower casing 112, and the casing 110 constituted by the upper casing 111 and the lower casing 112 is a halfway area of the existing pipe PE10 and the end of the new pipe PN20. Will house the area.

  Further, as shown in FIG. 2A, a fastening portion 111d extends horizontally from the upper housing 111 on the opposite side of the housing 110 where the new pipe PN20 is disposed. A fastening portion 112f (see FIG. 4) corresponding to the fastening portion 111d extends horizontally from the lower housing 112, and the positions of the screw holes are matched. Therefore, a bolt may be inserted from one side of each screw hole, and a nut may be installed on the opposite surface and fastened.

  A part PE13 in the middle region of the existing pipe PE10 is divided into a part on the diagonally right rear in FIG. 1 and a part on the diagonally left front (FIG. 2) by the lower cutting part 122 of the cutting member 120 (see FIG. 4). 2 is a part of the middle region of the existing pipe PE10 that has been cut and discharged into a right part and a left part. In the lower cutting part 122, for example, cutting blades 122a and 122b are arranged on the front and rear of the lower surface of the lower cutting part 122 (in FIG. 1, the diagonally left front is defined as “front”), and accordingly on the front and rear of the lower surface of the cutting member 120 Has been. When the cutting blades 122a and 122b are pressed against the existing pipe and moved downward, the existing pipe is cut. The cutting blades 122a and 122b have a circular shape corresponding to the side shape of the existing pipe in FIG. 1, but are not limited thereto. For example, as shown in FIG. 1, when the cutting blades 122a and 122b have a shape including an arc corresponding to the side surface shape of the existing pipe PE10, the cutting blades 122a and 122b come into contact with the existing pipe PE10 at the start of cutting. The length may increase and it may be necessary to apply a large force at the start of cutting. Therefore, the cutting blades 122a and 122b are not shaped like arcs, for example, W-shaped or M-shaped, and at the start of cutting, the left and right cusps of the cutting blades 122a and 122b or the central cusp of the M-shape hit the existing pipe PE10 It is also possible to reduce the force required to start cutting. As shown in FIG. 1, the cutting blades 122a and 122b have a shape including an arc corresponding to the shape of the side surface of the existing pipe, so that cutting is performed by the cutting member operation unit 170 (see FIG. 4) as will be described later. Even if the member 120 is operated, the cutting member 120 is not rotated, and a part of the middle region of the existing pipe PE10 can be more reliably cut. Further, the cutting member 120 is not rotated, and the partial PE 13 can be removed more reliably as described below.

  Immediately after the connection unit 100 is installed, the cutting member 120 is disposed opposite to the midway area of the existing pipe. More specifically, the cutting member 120 is arrange | positioned on partial PE13 connected to the existing area of the existing pipe. Further, a discharge port is provided below a part PE13 of the existing pipe (position of the lower housing 112 on the side opposite to the side where the cutting member 120 is disposed), in other words, below a part of the middle region of the existing pipe. 112i (see FIG. 4, FIG. 5, FIG. 6 and FIG. 7) is provided. For this reason, when the cutting member 120 moves from the upper side of the existing pipe PE10 to the discharge port 112i, a part of the PE13 in the middle area of the existing pipe is cut, and thereafter, a part of the PE13 is connected to the connection unit 100 from the discharge port 112i. It can be discharged out of the housing 110 and removed. In addition, a part or the whole of the lower cutting portion 122 of the cutting member 120 can be discharged out of the connection unit 100 from the discharge port 112i. In addition, the discharge port 112i can be closed by the upper closing part 121 (refer FIG.4, FIG.5 and FIG.6) arrange | positioned on the lower cutting part 122. FIG.

  The discharge port 112i may be sealed until a part of the PE 13 is discharged. For example, the discharge port 112i may be temporarily closed from the outside of the connection unit 100 by a removable plate. Thereby, even when fluid leaks from the existing pipe PE10 during partial cutting of the middle region of the existing pipe PE10, it is possible to prevent the fluid from leaking outside the housing 110. This can prevent the work space from being submerged.

  The process of moving the cutting member 120 from the top to the bottom of the existing pipe PE10 will be described as follows. Immediately after the connection unit 100 is installed, as described above, the cutting member 120 includes the lower cutting part 122 and the upper closing part 121 disposed on the lower cutting part 122 (see FIGS. 4, 5 and 6). Is arranged and configured. The first cap 150 is a cap that closes the cutting member operation unit 170 (see FIG. 4) disposed at the position of the first cap 150. The cutting member operation unit 170 includes a cutting member operation rod 171, a cutting member operation rod feeding nut 172, and a cutting member operation rod receiver 173, and operates the position of the cutting member 120. For example, the cutting member operation rod feeding nut 172 is a screw hole provided in the upper casing 111, and the cutting member operation rod 171 is a shaft-like bolt inserted into and engaged with the screw hole. The hook receiving member 173 is a means (for example, a bolt bearing) that receives the bolt on the upper surface of the upper portion (the upper closing portion 121) of the cutting member 120. Therefore, for example, by rotating the cutting member operating rod 171 that is a bolt by an electric driver or the like, the upper closing portion 121 can be moved from the top to the bottom. By moving the upper closing part 121 from the top to the bottom, the lower cutting part 122 moves from the top to the bottom, the lower cutting part 122 cuts a part of the PE 13, and then the part PE 13 and the lower cutting part 122 are discharged. It can be discharged from the outlet 112i. Further, when part of the PE 13 and the lower cutting part 122 are discharged from the discharge port 112i, the upper closing part 121 can be configured to close the discharge port 112i and seal the connection unit 100. In FIG. 4, the tip of one bolt is positioned on the upper surface of the upper closing portion 121, but the tips of a plurality of bolts may be positioned on the upper closing portion 121. Accordingly, when the plurality of bolts are rotated and the upper closing part 121 is moved from the top to the bottom, the upper closing part 121 and the lower cutting part 122 can be prevented from rotating.

  In addition, it is preferable that the lower cutting part 122 has the passage part 122c which connects the front and back of the lower cutting part 122. The passage part 122c in the embodiment is configured by a hole that communicates with the front and rear of the lower cutting part 122 and has a closed wall surface. Therefore, it is preferable that the cutting member 120 which has the lower cutting part 122 as a part has the passage part 122c. When the lower cutting part 122 cuts the existing pipe and the passage part 122c descends to the position of the existing pipe PE10, the lower cutting part 122 communicates (passes through) the passage part 122c even while the lower cutting part 122 is cutting the existing pipe PE10. ) And the flow of the fluid, it is possible to avoid stopping the fluid flow in the existing pipe PE10. Therefore, for example, in the construction of waterworks, it is possible to avoid the occurrence of water outage.

  The second cap 160 is a cap that closes the closing member operation unit 180 (see FIG. 4) disposed at the position of the second cap 160. The closing member operation unit 180 includes a closing member operation rod 181, a closing member operation rod feed nut 182, and a blocking member operation rod receiver 183, and operates the position of the blocking member 140. For example, the closing member operation rod feeding nut 182 is a screw hole provided in the upper casing 111, and the closing member operation rod 181 is a shaft-like bolt inserted into and engaged with the screw hole. The scissor support 183 is a means (for example, a bolt bearing) that receives the bolt on the upper surface of the closing member 140. Therefore, for example, by rotating the closing member operating rod 181 which is a bolt with an electric driver or the like, as will be described later, the closing member 140 (see FIGS. 4, 5 and 6; shown in FIGS. 1 and 2). Is not operated, and one side of the intermediate region of the existing pipe PE10 cut by the lower cutting part 122 is closed. In FIG. 1 and FIG. 2, the midway region on the part PE12 side of the existing pipe PE10 is closed out of the midway region of the cut existing pipe PE10. As a result, fluid does not flow to the part PE12 of the existing pipe, and the existing pipe is cut at the distal ends of the second existing pipe lower connection part 112b and the second existing pipe upper connection part 111b, and the blocking plug 15 is removed. Can be installed.

  FIG. 3 is a diagram for explaining a state where an existing pipe and a new pipe are arranged adjacent to each other.

  As shown in FIG. 3A, the existing pipe PE10 extends to the left and right. In the case of waterworks, normally, the existing pipe PE10 is buried in the ground, so the ground is dug up to expose the middle region of the existing pipe PE10. In addition, necessary work space for the connection unit 100 and the newly installed pipe PN20 is secured. In addition, the flow of the fluid in the existing pipe PE10 may be directed from the right to the left in FIG. 3A, or may be directed from the left to the right.

  Next, as shown in FIG. 3B, the end region of the new pipe PN20 is disposed close to the middle region of the existing pipe PE10. Although not shown in FIG. 3 (B), a valve for controlling the flow of fluid (for example, tap water) in the new pipe PN20 may be provided at a position away from the end region of the new pipe PN20 by a predetermined distance. . “Separated by a predetermined distance” means that the connection unit 100 is provided at a position excluding a space necessary for installation. Specifically, it is provided at a position excluding a portion where the new pipe PN20 is covered by the new pipe lower connection part 112c and the new pipe upper connection part 111c. Further, the fluid that flows through the new pipe PN20 may be a fluid that newly flows from the existing pipe PE10 to the new pipe PN20, or may be a fluid that newly flows from the new pipe PN20 to the existing pipe PE10.

  FIG. 3B shows that the new pipe PN20 is installed so as to be perpendicular to the existing pipe PE10, but the shapes of the new pipe lower connection part 112c and the new pipe upper connection part 111c are changed. Accordingly, the new pipe PN20 can be installed at an arbitrary angle with respect to the existing pipe PE10. Further, the new pipe PN20 and the existing pipe PE10 are shown to be on the same plane in FIG. 3B, but the new pipe PN20 and the existing pipe PE10 can be newly installed by changing the shapes of the upper casing 111 and the lower casing 112. The pipe PN20 and the existing pipe PE10 may not be on the same plane.

  FIG. 4 is an assembly perspective view of the connection unit 100 that is installed by accommodating the middle region of the existing pipe PE10 and the end region of the new pipe PN20.

  As described with reference to FIGS. 1 and 2, the recesses of the first existing pipe lower connection part 112a and the second existing pipe lower connection part 112b protruding in the front and rear of the lower housing 112 are provided in the middle of the existing pipe PE10. The concave portion of the new pipe lower connection portion 112c that is arranged below the area and protrudes to the right of the lower casing 112 is arranged below the middle area of the new pipe PN20, and the position of the lower casing 112 is fixed. For example, the position of the lower casing 112 is fixed using a jack or the like from the bottom of the work space that is secured by exposing the middle region of the existing pipe PE10. At this time, since the discharge port 112i is formed in the bottom surface of the lower housing 112, it is preferable that the discharge port 112i is not blocked by a jack or the like. For example, the back surface of the lower housing on the first existing pipe lower connection part 112a and the second existing pipe lower connection part 112b of the discharge port 112i is supported by a jack or the like.

  After fixing the lower housing 112, the upper housing 111 is placed on the lower housing 112 to form an integrated housing 110. At this time, as shown in FIG. 4, the cutting member 120 and the closing member 140 are arranged above the middle region of the existing pipe PE10. The closing member 140 is preferably adjacent to the cutting member 120, and when the tip of the vertically extending plate portion is positioned at the upper front end of the cutting member 120, the closing member 140 is lowered. By moving in the direction, the closing by the closing member 140 can be performed more smoothly. In other words, the trouble of adjusting the position by moving the position of the closing member 140 back and forth for closing can be saved.

  Further, the cutting member operating rod 171 constituting the cutting member operating portion 170 is connected to the cutting member operating rod feeding nut 172 and the cutting member operating rod receiving tool 173, and the closing member operating rod 181 constituting the closing member operating portion 180 is connected. The closing member operation rod feed nut 182 and the closing member operation rod receiver 183 are connected. Here, as described above, the cutting member operation rod feeding nut 172 is provided in the upper casing 111, and the cutting member operation rod receiving tool 173 is provided on the upper surface of the cutting member 120. Further, the closing member operation rod feeding nut 182 is provided on the upper casing 111, and the closing member operation rod receiving tool 183 is provided on the upper surface of the closing member 140.

  For example, as an example of each of the cutting member operation rod 171 and the closing member operation rod 181, a shaft-shaped bolt can be cited, and as an example of each of the cutting member operation rod feeding nut 172 and the closing member operation rod feeding nut 182, A screw hole arranged on the upper surface of the body 111 can be mentioned, and a bolt can be inserted into the screw hole to engage a screw thread of the bolt with a screw valley of the screw hole. Further, each of the cutting member operation rod receiver 173 and the closing member operation rod receiver 183 can be a bolt receiver provided on the upper surface of the cutting member 120 and a bolt bearing provided on the upper surface of the closing member 140.

  Therefore, for example, a bolt as an example of each of the cutting member operation rod 171 and the closing member operation rod 181 is inserted into a screw hole as an example of each of the cutting member operation rod feed nut 172 and the closure member operation rod feed nut 182, respectively. The lower ends of the bolts can be connected to the cutting member 120 and the closing member 140 via the respective receiving members 173 and 183.

  For example, by connecting the lower end of a plurality of bolts instead of the lower end of one bolt to the closing member 140, the closing member 140 can be prevented from rotating due to the rotation of the bolt 181.

  In order to integrate the upper housing 111 with the lower housing 112, the positions of the fastening portions of the first existing pipe lower connection portion 112a and the first existing pipe upper connection portion 111a are aligned, and the second existing pipe lower connection portion 112b is aligned. And the second existing pipe upper connection part 111b are aligned, the positions of the new pipe lower connection part 112c and the new pipe upper connection part 111c are aligned, and the fastening part 112f and the fastening part 111d ( 2 (A)), and the respective fastening portions are fastened by fastening means such as bolts 201 and nuts 202.

  Thereby, except for the state where the discharge port 112i has an opening, the casing 110 of the connection unit 100 has a sealed structure that accommodates the middle region of the existing pipe PE10 and the end region of the new pipe PN20. . In addition, after each fastening part is fastened by fastening means such as the bolt 201 and the nut 202, the inside of the housing 110 of the connection unit 100 can be observed from the discharge port 112i. As a result, light is irradiated from, for example, the first existing pipe lower connection part 112a and the first existing pipe upper connection part 111a outside the connection unit 100, so that the first existing pipe lower connection part 112a and the first existing pipe upper part are irradiated. It can be confirmed whether the connection part 111a and the existing pipe PE10 are firmly connected and the casing 110 of the connection unit 100 is in a sealed state except for the discharge port 112i. In addition, the discharge port 112i is temporarily closed from the outside of the connection unit 100, and air is supplied from the outside of the connection unit 100, so that the pressure inside the housing 110 of the connection unit 100 is made larger or smaller than the atmospheric pressure. Later, by confirming that the atmospheric pressure does not change with the passage of time, it is also possible to confirm that the casing 110 of the connection unit 100 has a sealed structure.

  In FIG. 4, a first lower receiving portion 112 d is provided inside the lower housing 112 continuously to the concave portion of the first existing pipe lower connecting portion 112 a. In addition, a second lower receiving portion 112e is provided inside the lower housing 112 so as to be continuous with the concave portion of the second existing pipe lower connecting portion 112b. Thereby, the middle region of the existing pipe PE10 can be supported from below by the first lower receiving portion 112d and the second lower receiving portion 112e.

  As shown in FIG. 4, a cutting member 120 is disposed on the existing pipe PE10. Further, as shown in FIG. 4, an upper closing part 121 shown in a plate shape in FIG. 4 is arranged on the upper side of the cutting member 120, and a downward force is applied to the upper closing part 121 by the cutting member operation part 170. In addition, the upper closing part 121 can apply a downward force to the lower cutting part 122. Thus, by applying a force to the lower cutting part 122 from above, the existing pipe PE10 is cut by the cutting blades 122a and 122b (see FIGS. 1 and 2) provided in the lower cutting part 122. The first lower receiving portion 112d and the second lower receiving portion 112e are provided to support the force applied to the existing pipe PE10 by the lower cutting portion 122 when the existing pipe PE10 is cut by the lower cutting portion 122 of the cutting member 120. It has been. Therefore, it is preferable that the bottom surfaces of the first lower receiving portion 112d and the second lower receiving portion 112e are supported by a jack or the like.

  Further, in the extending direction of the existing pipe PE10 (the direction in which the fluid in the existing pipe PE10 flows), the first lower receiving portion 112d and the second lower receiving portion 112e are separated from each other by the length of the cutting member 120. Thereby, the lower cutting part 122 of the cutting member 120 moves between the first lower receiving part 112d and the second lower receiving part 112e while cutting the existing pipe PE10, and moves to the discharge port 112i.

  Further, the cutting blades 122a and 122b are connected to the lower cutting portion 122 of the cutting member 120 by making the distance between the first lower receiving portion 112d and the second lower receiving portion 112e as close as possible to the length of the cutting member 120. Even if it does not provide, it becomes possible to shear existing pipe PE10.

  In addition, the size of the opening surface of the discharge port 112i is preferably a size and shape that allows the lower cutting portion 122 to pass through the discharge port 112i. Moreover, it is preferable that the lower cutting part 122 can be separated from the upper closing part 121. Thereby, after the lower cutting part 122 cuts the existing pipe PE10, a part of the PE13 and the lower cutting part 122 can be discharged from the discharge port 112i to the outside of the connection unit 100 and removed, and the lower cutting part 122 is recovered. Therefore, the reuse of another connection unit 100 is possible, and the manufacturing cost of the connection unit 100 can be reduced.

  When the lower cutting portion 122 is discharged from the discharge port 112i to the outside of the connection unit 100 and removed, the upper closing portion 121 closes the discharge port 112i, and leakage of fluid such as water leakage occurs from the discharge port 112i. Do not. Therefore, when the upper closing portion 121 is plate-shaped as shown in FIG. 4, one or both of the vertical and horizontal dimensions of the plate are larger than the corresponding dimensions of the opening of the discharge port 112i. ing. 4, 5, and 6, the side surface of the opening of the discharge port 112 i is formed perpendicular to the bottom surface of the lower housing 112, but is not limited thereto. For example, the side surface of the opening of the discharge port 112i becomes larger as it moves from the bottom surface of the lower housing 112 to the upper portion, and may have a tapered shape, for example. In this case, the upper closing part 121 can close the discharge port 112i before reaching or reaching the opening surface of the discharge port 112i.

  Instead of the configuration in which the upper closing part 121 closes the discharge port 112i, the lower cutting part 122 may be configured to close the discharge port 112i after cutting the existing pipe PE10. In this case, the lower part of the lower cutting part 122 is sized and shaped so that it can pass through the discharge port 112i. However, after the lower part of the lower cutting part 122 passes through the discharge port 112i, the upper part of the lower cutting part 122 is discharged. The size and shape cannot pass through the outlet 112i, and the outlet 112i is closed. Therefore, in this case, since it is not necessary to separate the upper closing part 121 and the lower cutting part 122, the lower cutting part 122 and the upper closing part 121 can be integrally formed.

  After the cutting of the existing pipe PE10 by the cutting member 120, the closing member 140 closes one side generated by partly cutting a midway region of the cut existing pipe 10. In FIG. 4, the closing member 140 is formed by combining a horizontally extending plate portion and a vertically extending plate portion so as to close the cross section of the existing pipe PE10 cut by the cutting blade 122a of the lower cutting portion 122. It has a letter shape. A downward force is applied to the closing member 140 via the closing member operation portion 180, and one side of the existing pipe PE10 cut by the cutting member 120 is closed by a vertically extending plate portion.

  5 and 6 are diagrams for explaining the process of cutting the existing pipe PE10 by the cutting member 120, closing the discharge port 112i, and closing one of the cuts of the existing pipe PE10 by the closing member 140. FIG.

  FIG. 5A is a top view showing a state in which the connection unit 100 is installed in the existing pipe PE10 and the new pipe PN20. FIG. 5B, FIG. 5C, FIG. 6A, and FIG. ) And FIG. 6C each show a cross-sectional view taken along a line II in FIG. 5A.

  FIG. 5B shows a structure in which the casing 110 of the connection unit 100 is sealed except that the connection unit 100 is installed in the existing pipe PE10 and the new pipe PN20 and the discharge port 112i has an opening. It is sectional drawing just after. As shown in FIG. 5 (B), the intermediate area of the existing pipe PE10 includes the first existing pipe lower connection part 112a, the first lower receiving part 112d, the second lower receiving part 112e, and the second existing pipe of the lower housing 112. The cutting member 120 and the closing member 140 are disposed on the existing pipe PE10, supported by the lower connection portion 112b from below. An upper closing part 121 is disposed above the cutting member 120, and the upper closing part 121 is connected to a bolt 171 (cutting member operation rod) via a bolt bearing 173 (cutting member operation rod receiving tool), for example. Yes. The closing member 140 is connected to the bolt 181 (closing member operating rod) via, for example, a bolt bearing 183 (closing member operating rod receiving tool). Therefore, the bolts 171 and 181 as an example are inserted into the screw holes of the nuts 172 and 182 fixed to the upper part of the upper casing 111, respectively.

  In FIG. 5C, a bolt 171 as an example of a cutting member operation rod is rotated by an electric screwdriver or the like, the cutting member 120 is moved toward the discharge port 112i, and a part PE13 of the existing pipe PE10 is cut. The process on the way is shown. In FIG. 5C, the passage part 122c provided in the lower cutting part 122 of the cutting member 120 is lowered to the position of the existing pipe PE10. The passage part 122c allows the fluid flowing through the existing pipe PE10 to pass while the lower cutting part 122 cuts a part of the middle region of the existing pipe PE10 (in other words, during the cutting operation), and passes the existing pipe PE10. Sustain the flow in Therefore, even while part of the middle region of the existing pipe PE10 is cut, the flow of fluid in the existing pipe PE10 can be maintained, and the occurrence of water breakage or the like can be avoided.

  6A, the lower cutting part 122 of the cutting member 120 cuts a part PE13 of the existing pipe PE10 and is discharged together with the part PE13 from the discharge port 112i, and the upper closing part 121 closes the discharge port 112i. Shows the state. Even in this state, the fluid flowing through the existing pipe PE10 can flow through the connection unit 100. Further, since the end region of the new pipe PN20 is accommodated in the housing 110 of the connection unit 100, when the valve is provided in the new pipe PN20, the fluid in the existing pipe PE10 is opened by opening the valve. In addition to this flow, a fluid flow can be generated between the existing pipe PE10 and the new pipe PN20, and the fluid can be communicated between the existing pipe PE10 and the new pipe PN20.

  In FIG. 6B, the bolt 181 as an example of the closing member operation rod is rotated by an electric screwdriver or the like, the closing member 140 is lowered in the connection unit 100, and the existing pipe PE10 is cut by the closing member 140. The state where the part of PE12 is closed is shown. In this state, since the part PE12 is blocked, the fluid flow between the part PE11 and the part PE12 of the existing pipe stops, but the fluid flow between the part PE11 and the new pipe PN20. Can last.

  FIG. 6C shows an example of a closing member operation rod, in which a bottom closing member 130 is further installed from the lower side of the connection unit 100 if necessary, and a part PE12 side of the existing pipe PE10 is cut. FIG. 5 is a view showing a state in which a bolt 171 is pulled out and closed with a first cap 150. As shown in FIG. 6C, even after the PE 12 is partially closed by the closing member 140, the closing member 140 is pressed against the second lower receiving portion 112 e by the bolt 181, so The closing of the part PE12 can be continued more reliably.

  In addition, when the fluid is flowing from the part PE11 side of the existing pipe PE10 to the part PE12, when the part PE12 is closed by the closing member 140, the closing member is caused by the pressure of the fluid flowing in from the part PE11. 140 occlusions can continue.

  FIG. 7 is a top view of the lower housing 112 when a groove 112h is formed in the lower housing 112 in order to make the closing by the closing member 140 more reliable. In the groove 112h, a plate portion of the closing member 140 extending vertically in FIGS. 5 and 6 and the like enters the groove 112h. For this reason, the width | variety of the perpendicular | vertical board part extended perpendicularly in FIG.5, FIG.6 etc. of the closure member 140 is made larger than the diameter of the existing pipe PE10.

  In order to form the groove 112h, a first convex portion 112g is formed inside the lower housing 112 on the left side of the groove 112h, adjacent to the second lower receiving portion 112e in the vertical direction. A second convex portion 112j is formed on the right side of the groove 112h.

  As described above, the vertically extending plate portion of the closing member 140 enters the groove 112h, so that the closing member 140 is fixed by the groove 112h even when, for example, a fluid flows from a part PE12 of the existing pipe PE10. Therefore, the closing of the closing member 140 can be continued.

  FIG. 8 is a diagram for explaining a process of implementing the present invention using a connection unit according to an embodiment of the present invention and switching from using a water receiving tank to using a pressure-increasing direct connection pump.

  More specifically, as shown in FIG. 8 (A), the water that flows through the water supply pipe PE30 is received by the water receiving tank 800, and the stored water is received by the pump 801 via the pipe PE40. Supplying to the water tap 802 of the compartment. In this state, in order to abolish the use of the water receiving tank 800 and supply clean water to the water tap 802 of each section by the pressure-increasing direct connection pump 803, first, the pressure-increasing direct connection pump 803, the water supply pipe PE30, New pipes PN50 and PN60 are installed in the middle areas of the pipes PE40 so that the end areas are adjacently arranged.

  Next, as shown in FIG. 8 (B), the first connection unit 200 is installed in the middle region of the water supply pipe PE30 and the end region of the new pipe PN50, and the middle region of the pipe PE40 and the new pipe PN60. The second connection unit 300 is installed in the end region. Hereinafter, the first connection unit 200 may be abbreviated as a connection unit 200, and the second connection unit 300 may be abbreviated as a connection unit 300. When the installation of each connection unit 200 and 300 is finished, first, a part of the middle region of the water supply pipe PE30 is cut by the cutting member 120 of the connection unit 200, and the discharge port is cut by the upper closing part 121 or the lower cutting part 122 112i is closed. Thereby, a part of the supplied upper water can be branched to the new pipe PN50 while the supply of the upper water through the water supply pipe PE30 to the water receiving tank 800 is continued. As a result, part of the clean water can reach the connection unit 300 via the pressure-increasing direct connection pump 803.

  Therefore, a part of the middle region of the pipe PE 40 is cut by the lower cutting part 122 of the connection unit 300, and the discharge port 112 i of the connection unit 300 is closed by the upper closing part 121 or the lower cutting part 122 of the cutting member 120. In this state, the clean water flowing through the water supply pipe PE 30 can be supplied to the water tap 802 via the water receiving tank 800 and the pump 801, and the water is also supplied via the pressure-increasing direct connection pump 803. It can also be supplied to the faucet 802.

  Therefore, in the connection unit 200, the flow of clean water from the connection unit 200 toward the water receiving tank 800 is stopped by the closing member 140. Next, the pump 801 is stopped, and the flow of clean water flowing from the water receiving tank 800 to the connection unit 300 is stopped. In this state, the clean water supplied from the water supply pipe PE30 is supplied to the water tap 802 via the pressure-increasing direct connection pump 803. In addition, clean water flows into the connection unit 300 via the new pipe PN60, the water pressure increases, and the connection unit 300 is easily blocked by the blocking member 140.

  Accordingly, since the clean water flowing through the water supply pipe PE30 is supplied to the water tap 802 only via the pressure-increasing direct connection pump 803, the water supply tank 800 and the pump 801 are connected immediately after the connection unit 200. The water supply facility that comes to the front of the unit 300 becomes unnecessary.

  Therefore, as shown in FIG. 8 (C), the water supply facility immediately after the connection unit 200 and immediately before the connection unit 300 via the water receiving tank 800 and the pump 801 is removed, and the water flowing through the water supply pipe PE30 is removed. Water is supplied to the pressure increase direct connection pump 803 via the connection unit 200 and the new pipe PN50, and is supplied from the pressure increase direct connection pump to the water tap 802 via the new installation pipe PN60 and the connection unit 300. become.

  As described above, according to the flow path changing method using the flow path changing connection unit and the flow path changing connection unit according to the embodiment of the present invention, the cutting member partially cuts the intermediate region of the existing pipe, The cut part is discharged from the discharge port, and the cutting member has a passage part, and the cutting member passes the fluid flowing through the existing pipe while cutting the part of the existing area of the existing pipe. The effect is enormous, for example, the flow can be continued and the stop time of the fluid flowing through the existing pipe can be eliminated.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made as in the modifications described later. Included within the technical scope of the invention. In addition, the effects described in the embodiments are merely a list of the most preferable effects resulting from the present invention, and are not limited to those described in the embodiments. In addition, although the above-mentioned embodiment and the modification mentioned later can also be used in combination suitably, detailed description is abbreviate | omitted. Moreover, in the modified example demonstrated below, the part which fulfill | performs the function similar to embodiment mentioned above is attached | subjected suitably, and the overlapping description is abbreviate | omitted suitably.

(First modification)
FIG. 9 is a cross-sectional view (corresponding to FIG. 6C) showing a three-way communication state in which fluid is communicated between both the existing region of the existing pipe and the end region of the new pipe as a first modification. .
In the embodiment, as shown in FIG. 6C, the example in which a part of the PE 12 is closed by the closing member 140 and the fluid is communicated between the part PE 11 of the existing pipe PE 10 and the new pipe PN 20 is shown. However, the present invention is not limited to this. For example, as shown in FIG. 9, a configuration may be adopted in which fluid is communicated on three sides of the existing pipe PE10, the partial PE11, the partial PE12, and the new pipe PN20 without closing the partial PE12 by the closing member 140. Good.

(Second modification)
FIG. 10 is a schematic diagram showing a cutting member having a groove-shaped passage as a second modification.
In the embodiment, the passage portion 122c provided in the lower cutting portion 122 is configured as a hole that communicates with the front and rear of the lower cutting portion 122 and has a closed wall surface (see FIG. 1 and the like). However, the configuration of the passage portion 122c may be, for example, a groove shape having a concave cross section, like the passage portion 122d shown in FIG. The passage part 122d shown in FIG. 10 communicates with the front and rear of the lower cutting part 122, and is configured as a space with an open wall surface. Although FIG. 10 shows an example in which one passage portion 122d is provided on each side surface of the lower cutting portion 122, a plurality of passage portions 122d may be provided on each side surface of the lower cutting portion 122. In addition, the cross-sectional shape of the passage portion 122d is not limited to the concave shape, and may be a triangular shape, a semicircular shape, or the like.

(Third Modification)
FIG. 11 is a cross-sectional view (corresponding to FIG. 9) showing another aspect of the three-way communication state as a third modification.
In the embodiment, as shown in FIG. 3B, the example in which the new pipe PN20 is installed so as to be perpendicular (orthogonal) to the existing pipe PE10 is shown, but the present invention is not limited to this. For example, as shown in FIG. 11, the new pipe PN20 may be installed in parallel with the existing pipe PE10. Also in this configuration, since the part PE12 is not closed by the closing member 140, the fluid can be communicated in the three directions of the part PE11, the part PE12, and the new pipe PN20 of the existing pipe PE10. 11 shows a configuration in which the new pipe PN20 is provided on the left side of the casing 110, but the new pipe PN20 may be provided on the right side or the back side of the casing 110.

(Fourth modification)
FIG. 12 is a cross-sectional view showing another mode of a two-way communication state in which a fluid communicates between one of the existing areas of the existing pipe and the end area of the new pipe as a fourth modification (FIG. 6C). Corresponding figure).
In the embodiment, as shown in FIG. 6C, after partially cutting PE 13 (not shown) by the lower cutting part 122, the discharge port 112 i is closed by the upper closing part 121, and the bottom closing member 130 is further installed. However, the present invention is not limited to this. After cutting part PE13 by the lower cutting part 122, the whole cutting member 120 including the upper closing part 121 is discharged together with the part PE13, and the discharge port 112i is closed by the bottom closing member 130 as shown in FIG. You may make it do. In such a configuration, it is necessary to adopt a configuration in which the discharge port 112i is immediately closed by the bottom closing member 130 after the cutting member 120 is discharged.

(5th modification)
FIG. 13 is a cross-sectional view (corresponding to FIG. 9) showing still another aspect of the three-way communication state as a fifth modification.
In the first modified example, as shown in FIG. 9, after a part of PE 13 (not shown) is cut by the lower cutting part 122, the discharge port 112 i is closed by the upper closing part 121, and the bottom closing member 130 is further installed. An example is shown, but the present invention is not limited to this. After cutting part PE13 by the lower cutting part 122, the cutting member 120 may be discharged together with the part PE13, and the discharge port 112i may be closed by the bottom closing member 130 as shown in FIG.

100 ... Connection unit for channel change 110 ... Housing 111 ... Upper housing 111a ... First existing pipe upper connection part 111b ... Second existing pipe upper connection part 111c ... New installation Pipe upper connection part 112 ... Lower casing 112a ... First existing pipe lower connection part 112b ... Second existing pipe lower connection part 112c ... New pipe lower connection part 112d ... First receiving part 112e ... 2nd receiving part 112f ... fastening part 112g ... 1st convex part 112h ... groove 112i ... discharge port 112j ... 2nd convex part 120 ... cutting member 121 ... -Upper closing part 122 ... Lower cutting parts 122a, 122b ... Cutting blades 122c, 122d ... Passing part 130 ... Bottom closing member 140 ... Closing member 150 ... First cap 160 ... -Second cap 170 ... cutting member Growing part 171 ... Cutting member operation rod 172 ... Cutting member operation rod feed nut 173 ... Cutting operation manipulation rod receiver 180 ... Closure member manipulation portion 181 ... Closure member manipulation rod 182 ... Blocking member operation rod feeding nut 183... Blocking member operation rod feed holder PE10... Existing pipe PE11... Existing pipe portion PE12... Existing pipe portion PE13. Part PN20 ... Newly installed pipe

Claims (4)

A casing that accommodates the existing pipe and the end area of the existing pipe by arranging the existing pipe and the new pipe adjacent to each other, and a part of the existing pipe that is arranged in a manner to face the intermediate area of the existing pipe. A connection unit for changing a flow path, wherein the fluid is communicated between one or the other or both of the existing areas of the existing pipe in a state of being cut by the cutting member and an end area of the new pipe Because
The housing includes a discharge port for discharging a part of the midway area of the existing pipe cut by the cutting member to the outside of the housing,
The cutting member is provided with a passage portion that maintains the flow of fluid in the existing pipe while cutting the middle region of the existing pipe, and the cutting member moves to the discharge port and closes the discharge port. A flow path changing connection unit.   2. The flow path change according to claim 1, wherein a closing member that closes one of the intermediate regions of the existing pipe that has been cut by the cutting member is provided adjacent to the cutting member. Connection unit. The cutting member includes a lower cutting part that cuts a midway region of the existing pipe and an upper closing part that is disposed in contact with the lower cutting part,
The lower cutting part passes through the outlet, the upper closing part closes the outlet, and the lower cutting part is separated from the upper closing part. Item 3. The flow path changing connection unit according to Item 2. A casing that accommodates the existing pipe and the end area of the existing pipe by arranging the existing pipe and the new pipe adjacent to each other, and a part of the existing pipe that is arranged in a manner to face the intermediate area of the existing pipe. A cutting member that at least includes a discharge port that discharges a part of an intermediate region of the existing pipe cut by the cutting member to the outside of the housing, and the cutting member A flow path changing method using a flow path changing connection unit having a passage portion for maintaining the flow of fluid in the existing pipe while cutting the middle area of the existing pipe,
A moving step in which the cutting member moves to the outlet;
A flow path changing method using a flow path changing connection unit, which includes a closing step in which the cutting member closes the discharge port after the moving step.

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