JP5611890B2 - Chip recovery method and chip recovery device for continuous water cutting - Google Patents

Description

  The present invention relates to a chip recovery method and a chip recovery apparatus used in continuous water cutting.

  In recent years, so-called continuous water cutting has been performed in which a peripheral wall of a water pipe is cut with a cutter while maintaining the state of continuous water without stopping the existing water pipe on the upstream side. In the continuous water cutting, as described in Patent Documents 1 and 2 below, a branch case is externally attached to the water pipe so as to surround the cutting portion. Depending on the purpose of the construction, a branch valve device for inserting a valve body into the water pipe and closing the pipe line is attached to the branch case, or a branch pipe for forming a bypass is connected.

  In the continuous water cutting, it is necessary to appropriately collect chips generated at the time of cutting so that they are not mixed into the water pipe or blockage of the pipe line by the valve body. On the other hand, in the apparatus described in Patent Document 2, chips are discharged through a drain pipe attached to the bottom wall of the branch case. In this method, a water supply is made using a cutter that moves in the vertical direction. In the construction in which the peripheral wall above the pipe is perforated or the water pipe is cut from above, there are cases where the recovery of chips is not sufficient.

  That is, in the construction where the peripheral wall of the water pipe is cut from above with a cutter as described above, the operation of raising the cutter after cutting is included. It was sometimes carried and deposited. In particular, if chips accumulate on the flange surface of the branch pipe portion of the branch case, the chips may be caught when attaching a gate valve or the like to the branch case in a later process, which may cause a water stop failure and cause water leakage.

  Patent Document 3 below proposes a collecting device that sucks chips using a magnet, and describes a collecting device that sucks chips using a suction pipe inserted from the outside as a conventional technique. However, when using such a collection device to collect chips accumulated on the flange surface of the branch pipe portion of the branch case, in a situation where visual confirmation is difficult, the suction port for sucking the chips along the flange surface Since it is necessary to move, there exists a possibility that the result may vary depending on the skill of the operator.

No. 04-29188 No. 07-5354 JP 2004-283999 A

  The present invention has been made in view of the above circumstances, and a purpose thereof is a chip recovery method and chip recovery capable of easily recovering chips accumulated on a flange surface of a branch pipe portion of a branch case in continuous water cutting. To provide an apparatus.

  The above object can be achieved by the present invention as described below. That is, the chip recovery method in the continuous water cutting according to the present invention includes a step of externally fitting and attaching a branch case to a fluid pipe, and directing a flange surface of the branch pipe portion of the branch case upward, and cutting above the branch case. A step of attaching a device, a step of lowering a cutter provided in the cutting device, cutting a peripheral wall of the fluid pipe surrounded by the branch case from above, and a step of raising the cutter; and from above the branch case The step of removing the cutting device and attaching the chip collection device, the step of lowering the cleaning jig provided in the chip collection device, thereby causing the cleaning member to face the flange surface, and the operation of the cleaning jig Moving the member in the circumferential direction along the flange surface, and discharging chips through a through-hole provided in the flange surface.

  In this method, in the continuous water cutting, the peripheral wall of the fluid pipe is cut with a cutter from above, and then a chip collecting device is attached above the branch case instead of the cutting device. When the cleaning jig provided in the chip collecting device is lowered, the sweeping member faces the flange surface of the branch pipe portion of the branch case, and the sweeping member moves in the circumferential direction along the flange surface by the operation of the cleaning jig. As a result, the chips accumulated on the flange surface can be swept by the sweeping member, discharged from the through hole to the outside, and easily recovered.

  In the chip recovery method in the continuous water cutting according to the present invention, it is preferable that the sweep member is constituted by a brush or a spatula. Thereby, while being able to comprise a sweeping member simply, the chip | tip deposited on the flange surface can be swept flexibly.

  In the chip recovery method in the continuous water cutting according to the present invention, it is preferable that when the cleaning jig is lowered, the cleaning jig is brought into contact with a part of the flange surface from above to perform vertical positioning. . According to this, since the positioning of the cleaning jig in the vertical direction is easily performed and the relative position of the sweeping member with respect to the flange surface is accurately determined, the chips accumulated on the flange surface can be accurately swept and recovered without a lapse. it can.

  In the chip collection method in the continuous water cutting according to the present invention, it is preferable to perform horizontal positioning by fitting the cleaning jig inside the flange surface when the cleaning jig is lowered. According to this, since the horizontal positioning of the cleaning jig is easily performed, and the relative position of the sweeping member with respect to the flange surface is accurately determined, the chips accumulated on the flange surface can be accurately swept and recovered without a lapse. it can.

  Further, the chip recovery apparatus in the continuous water cutting according to the present invention is a chip recovery apparatus used in a construction in which the peripheral wall of the fluid pipe surrounded by the branch case is cut with a cutter from above, and the flange surface of the branch pipe section is provided. An apparatus main body mounted above the branch case facing upward, a cleaning jig configured to be movable up and down with respect to the apparatus main body, and disposed to face the flange surface by lowering the cleaning jig. A sweeping member, and is configured to be movable in a circumferential direction along the flange surface from a state where the sweeping member is opposed to the flange surface by operation of the cleaning jig.

  This apparatus can be used for the chip recovery method in the above-described continuous water cutting of the present invention. When the main body is mounted above the branch case and the cleaning jig is lowered, the sweeping member is placed facing the flange surface of the branch pipe portion of the branch case, and the cleaning member is moved to the flange surface by operating the cleaning jig. Along the circumferential direction. For this reason, the chips accumulated on the flange surface can be swept by the sweeping member, and the chips discharged to the outside can be easily recovered by using the operation.

  In the chip collecting apparatus in the continuous water cutting according to the present invention, it is preferable that the sweeping member is constituted by a brush or a spatula. Thereby, while being able to comprise a sweeping member simply, the chip | tip deposited on the flange surface can be swept flexibly.

  In the chip collecting apparatus in the continuous water cutting according to the present invention, it is preferable that the cleaning jig is formed with a vertical positioning portion that can contact a part of the flange surface from above. According to this, since the positioning of the cleaning jig in the vertical direction is easily performed and the relative position of the sweeping member with respect to the flange surface is accurately determined, the chips accumulated on the flange surface can be accurately swept and recovered without a lapse. it can.

  In the chip collecting apparatus in the continuous water cutting according to the present invention, it is preferable that the cleaning jig is formed with a horizontal positioning portion that can be fitted inside the flange surface. According to this, since the horizontal positioning of the cleaning jig is easily performed, and the relative position of the sweeping member with respect to the flange surface is accurately determined, the chips accumulated on the flange surface can be accurately swept and recovered without a lapse. it can.

Longitudinal sectional view of a water pipe fitted with a branch case as seen from the pipe axis direction Longitudinal sectional view when the water pipe of FIG. 1 is viewed from the side A longitudinal sectional view showing a state in which a cutting device is mounted above the branch case Longitudinal sectional view showing how the peripheral wall of a water pipe is cut Longitudinal sectional view showing a state in which a chip recovery device is attached Longitudinal section showing how the flange surface is cleaned Longitudinal sectional view showing a modification of the cleaning jig A longitudinal sectional view showing a state where an insertion machine for installing a gate valve device is attached. Longitudinal sectional view showing the state of installing the gate valve device Longitudinal sectional view showing the state where the working gate valve and the insertion machine are removed

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, an example is shown in which a perforation is provided above an existing water pipeline by continuous water cutting and a gate valve device capable of closing the water pipeline is installed.

  First, as shown in FIGS. 1 and 2, the branch case 2 is externally attached to an existing water pipe 1 (an example of a fluid pipe), and the flange surface 21 of the branch pipe portion 20 of the branch case 2 faces upward. The branch case 2 has a split T-shape formed by combining a plurality of divided pieces 2A, 2B, and 2C, and the divided pieces are connected to each other by a fastener 22 made of a bolt and a nut. The branch pipe portion 20 is disposed so as to protrude upward from the pipe line, and a plurality of bolt holes are provided on the flange surface 21 thereof.

  In this embodiment, a guide bolt 23 with a tapered tip facing upward is attached to the bolt hole of the flange surface 21. This guide bolt 23 has a function of guiding the valve lid 62 of the gate valve device 6 to be attached in a subsequent process while water-tightly closing the bolt hole. Also, a discharge hose 81 (an example of a discharge pipe) is connected to one of the bolt holes via a ball valve 80 (an example of a valve). As will be described later, the bolt hole to which the discharge hose 81 is connected is used as a through hole for discharging chips.

  Next, as shown in FIG. 3, the cutting device 4 is attached above the branch case 2. In this embodiment, the work gate valve 3 is interposed between the branch case 2 and the cutting device 4. The working gate valve 3 includes a valve box 31 that is a tubular body that communicates with the branch pipe portion 20 and a valve body 32 that is displaced in the left-right direction and partitions the inside of the valve box 31 up and down. The cutting device 4 is flange-connected to the work gate valve 3 by a fastener.

  An inward projection 33 that is placed on the outer edge of the flange surface 21 and a lower projection 34 that surrounds the flange surface 21 are formed in the lower portion of the valve box 31. Is fitted into the branch pipe portion 20 with the upper portion thereof exposed. A fixing bolt (not shown) is attached to the lower protrusion 34 from the side, and the work gate valve 3 can be fixed to the branch case 2 by engaging the tip of the fixing bolt with the tapered portion of the flange. It has become. Such a fixing method is disclosed, for example, in Japanese Utility Model Publication No. 51-45704.

  Subsequently, as shown in FIG. 4, the cutter 40 included in the cutting device 4 is lowered, the peripheral wall of the water pipe 1 surrounded by the branch case 2 is cut from above, and then the cutter 40 is raised. The cutter 40 can move in the vertical direction according to the operation of the feed handle 42 and is configured to be rotatable by a driving means (not shown). The cutter 40 has a drill 41 protruding from the center position of the cylindrical hole saw, and the peripheral wall 11 of the cut water pipe 1 is hooked by the drill 41 and collected.

  When the peripheral wall of the water pipe 1 is cut, the inside of the branch case 2, the valve box 31, and the adapter 43 is filled with water. As described above, since the bolt hole of the flange surface 21 is closed by the guide bolt 23, water does not leak from here. The bolt hole may be closed by another means without using the guide bolt 23. In the present embodiment, the cutting device 4 includes the cylindrical adapter 43 in order to prevent the cutter 40 from hitting the valve body 32 when closed, but this may be omitted.

  The cutter 40 after cutting rises to a position higher than the flange surface 21, and the valve body 32 becomes a posture that can partition the inside of the valve box 31 up and down. As the cutter 40 moves up, chips generated during cutting may rise and accumulate on the flange surface 21. The chips accumulated on the flange surface 21 may cause problems such as poor water stop in the subsequent process, but in the present embodiment, the chips on the flange surface 21 can be easily recovered by the subsequent processes.

  Subsequently, the cutting device 4 is removed from above the branch case 2, and a chip collecting device 5 is attached as shown in FIG. This step is performed in a state where the work gate valve 3 is closed, that is, in a state where the inside of the valve box 31 is partitioned vertically by the valve body 32. The chip collection device 5 is opposed to the flange surface 21 by the device main body 51 attached above the branch case 2, the cleaning jig 52 configured to be movable up and down with respect to the device main body 51, and the cleaning jig 52 descending. And a sweeping member 53 disposed.

  The apparatus main body 51 is configured by a lid-like body that watertightly closes the opening facing upward, and is flange-connected to the valve box 31. The cleaning jig 52 includes a shaft portion 52 a that extends through the apparatus main body 51 in the vertical direction, a disk-shaped enlarged diameter portion 52 b that is provided at the lower end of the shaft portion 52 a and has a diameter corresponding to the flange surface 21. Is provided. Although not shown, a handle for turning the cleaning jig 52 is attached to the upper end of the shaft portion 52a. The sweep member 53 is provided in an annular shape on the lower surface of the enlarged diameter portion 52b.

  When the attachment of the chip collection device 5 is completed, the valve body 32 is displaced and the work gate valve 3 is opened. At this time, when it is difficult to move the valve body 32 due to the water pressure acting from below, the upper and lower sides of the valve body 32 are communicated with each other by a not-shown same pressure hose so that the pressures are adjusted to be equal.

  Next, as shown in FIG. 6, the cleaning jig 52 is lowered so that the sweep member 53 faces the flange surface 21. Then, by operating the cleaning jig 52, specifically, by turning the cleaning jig 52 around the shaft portion 52a, the circumferential direction along the flange surface 21 from the state where the sweep member 53 is opposed to the flange surface 21. Move to. At this time, by opening the ball valve 80, chips on the flange surface 21 swept by the sweep member 53 can be discharged to the outside through a bolt hole (an example of a through hole) and easily recovered.

  In this embodiment, since the sweep member 53 is composed of a brush, it is preferable that chips can be swept smoothly while receiving the guide bolt 23. Moreover, it is also suitable that the sweep member is made of a spatula, and it is conceivable that the sweep member is made of an elastic material such as rubber or sponge. The shape and material of the sweep member are not particularly limited as long as the chips on the flange surface 21 can be swept. The sweep member 53 is detachably attached to the cleaning jig 52 with a set screw or the like, and can be easily replaced when worn.

  The cleaning jig 52 is formed with a vertical positioning portion 52c that can contact a part of the flange surface 21 from above. Thereby, when the cleaning jig 52 is lowered, the vertical positioning portion 52c comes into contact with a part of the flange surface 21 from above to perform vertical positioning. In addition, since the vertical positioning portion 52c is formed inside the sweep member 53, it is possible to prevent the chips swept by the sweep member 53 from falling inward, which is useful for collecting the chips without any failure. is there.

  FIG. 7 is a modification in which a horizontal positioning portion 52 d that can be fitted inside the flange surface 21 is formed in the cleaning jig 52. According to such a configuration, when the cleaning jig 52 is lowered, the horizontal positioning portion 52d is fitted inside the flange surface 21 so that the horizontal positioning is performed. It is also possible to use the above-described vertical positioning portion 52c together with the cleaning jig 52 in which such a horizontal positioning portion 52d is formed.

  When the cleaning of the flange surface 21 is completed, the ball valve 80 is closed and the cleaning jig 52 is raised. Next, the work gate valve 3 is closed, the chip collecting device 5 is removed, and an insertion machine 7 for installing the gate valve device 6 is attached as shown in FIG. The gate valve device 6 includes a valve body 61 that can be inserted into the water pipe 1 and a valve lid 62 that is watertightly connected to the branch pipe portion 20 of the branch case 2. The insertion machine 7 includes a cylindrical adapter 71 that incorporates a valve body 61 and a valve lid 62, and an elevating jig 72 that is configured to freely move the valve body 61 and the valve lid 62 up and down.

  Thereafter, the working gate valve 3 is opened, and the lifting jig 72 is operated to lower the valve body 61 and the valve lid 62 as shown in FIG. 9, and the valve lid 62 is flange-connected to the branch pipe portion 20. At this time, the guide bolt 23 is inserted into the bolt hole of the valve lid 62, and the valve lid 62 can be appropriately guided. In addition, since the flange surface 21 has already been cleaned, accumulated water chips do not hinder the water stoppage between the valve lid 62 and the flange surface 21.

  When the valve lid 62 is connected to the branch case 2 in a watertight manner, the guide bolt 23 is replaced with the flange bolt 24 as shown in FIG. 10, and the flange bolt 24 is finally tightened after the insertion machine 7 and the working gate valve 3 are removed. Further, the flange bolt 24 is attached to the bolt hole after the ball valve 80 and the discharge hose 81 are removed, and then tightened. According to the above process, the gate valve apparatus 6 is installed in the water pipe 1 with the state of uninterrupted water maintained.

  The present invention is not limited to the embodiment described above, and various improvements and modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, an example in which chips are discharged through a through hole provided as a bolt hole on the flange surface is shown. However, a through hole for discharging chips may be provided separately from the bolt hole. Absent. Furthermore, chips may be discharged through a plurality of through holes.

  In the above-described embodiment, an example in which perforation is provided above the water pipe by continuous water cutting and the gate valve device is installed in the branch case is not limited to this. It is also possible to attach other devices and members such as a lid. In the above-described embodiment, the example in which the peripheral wall above the water pipe is perforated has been shown. However, the construction may be such that the fluid pipe is cut from above by a cutter that moves in the vertical direction. The invention can be applied.

  In the present invention, the fluid pipe is not limited to a water pipe, and may be a fluid pipe through which various liquids and gases flow.

1 Water pipe (an example of a fluid pipe)
2 Branch case 3 Work gate valve 4 Cutting device 5 Chip collection device 6 Gate valve device 7 Inserting machine 20 Branch pipe part 21 Flange surface 31 Valve box 32 Valve body 40 Cutter 51 Apparatus body 52 Cleaning jig 52a Shaft part 52b Diameter expansion Part 52c vertical positioning part 52d horizontal positioning part 53 sweeping member 80 ball valve 81 discharge hose

Claims (8)

Attaching the branch case to the fluid pipe, and directing the flange surface of the branch pipe portion of the branch case upward;
Attaching a cutting device above the branch case;
Lowering the cutter included in the cutting device, cutting the peripheral wall of the fluid pipe surrounded by the branch case from above, and then raising the cutter;
Removing the cutting device from above the branch case and attaching a chip collecting device;
A step of lowering a cleaning jig provided in the chip recovery device, thereby causing the cleaning member to face the flange surface;
A chip collection method in continuous water cutting, comprising: a step of moving the sweeping member in the circumferential direction along the flange surface by operating the cleaning jig, and discharging the chip through a through hole provided in the flange surface.   The chip recovery method in the continuous water cutting according to claim 1, wherein the sweep member is configured by a brush or a spatula.   The chip recovery method in the continuous water cutting according to claim 1 or 2, wherein when the cleaning jig is lowered, the cleaning jig is brought into contact with a part of the flange surface from above to perform vertical positioning. .   The chip recovery in the continuous water cutting according to any one of claims 1 to 3, wherein when the cleaning jig is lowered, horizontal positioning is performed by fitting the cleaning jig inside the flange surface. Method. A chip recovery device used in a construction for cutting a peripheral wall of a fluid pipe surrounded by a branch case with a cutter from above,
An apparatus main body attached above the branch case with the flange surface of the branch pipe portion facing upward, a cleaning jig configured to be movable up and down relative to the apparatus main body, and the flange surface by lowering the cleaning jig A sweeping member disposed opposite to the
A chip collecting apparatus in continuous water cutting configured to be movable in a circumferential direction along the flange surface from a state where the cleaning member faces the flange surface by an operation of the cleaning jig.   The chip collection apparatus in the continuous water cutting according to claim 5, wherein the sweeping member is constituted by a brush or a spatula.   The chip recovery apparatus in the continuous water cutting according to claim 5 or 6, wherein an upper and lower positioning portion capable of abutting from above on a part of the flange surface is formed on the cleaning jig.   The chip | tip collection | recovery apparatus in the continuous water cutting of any one of Claims 5-7 in which the horizontal positioning part which can be engage | inserted inside the said flange surface is formed in the said cleaning jig.

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