JP2013002472A - Method for cutting fluid tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for cutting a fluid tube that can suppress deformation of the fluid tube when the fluid tube is cut by a cutter member.SOLUTION: In the method for cutting the fluid tube 1 by which the cutter member 52 is moved in a radial direction of the fluid tube 1 thereby cutting the fluid tube 1 in a state of continuous flow in a casing 2 attached to the fluid tube 1 in a sealed state, and a flow-control body 11 is arranged in the casing 2 to control the flow of the fluid, a support 40 is disposed at the arranging position of the flow-control body 11 in the casing 2, the casing 2 is attached to the fluid tube 1, hence the support 40 abuts on the side facing the cutter member 52 in the fluid tube 1, then the fluid tube 1 is cut by the cutter member 52, and recovery means 71 is detachably connected to a means to be recovered 40b provided to the support 40 thereby recovering the support 40 from inside the casing 2.

Description

  The present invention cuts the fluid pipe in an uninterrupted state by advancing the cutter member in the radial direction of the fluid pipe in a casing that is hermetically attached to the fluid pipe, thereby controlling the flow of the fluid in the casing. The present invention relates to a method of cutting a fluid pipe in which a control fluid is installed.

  Conventionally, a part of an existing fluid pipe (fluid pipe) is cut by a cutter (cutter member) in an uninterrupted flow state, and a switching valve (fluid control) is inserted at this cutting position, so that the existing fluid pipe ( Some fluid pipes have a flow stop or branch (see, for example, Patent Document 1).

Japanese Patent No. 4144690 (page 5, FIG. 8)

  However, in the fluid pipe cutting method described in Patent Document 1, the cutter (cutter member) applies force to the existing fluid pipe in order to cut the existing fluid pipe (fluid pipe). The pipe is deformed by the force applied from the cutter, and the flow in the existing fluid pipe cannot be reliably stopped or branched by the switching valve (fluid control) disposed at the cutting location after the existing fluid pipe is cut. There is a problem of fear.

  The present invention has been made paying attention to such problems, and an object of the present invention is to provide a fluid pipe cutting method capable of suppressing deformation of the fluid pipe when the fluid pipe is cut by the cutter member.

In order to solve the above-described problem, a fluid pipe cutting method of the present invention includes:
In a casing that is hermetically attached to the fluid pipe, the fluid control is performed by cutting the fluid pipe in an uninterrupted state by advancing the cutter member in the radial direction of the fluid pipe, and controlling the flow of fluid in the casing. A fluid pipe cutting method for installing
A support base is disposed at the installation position of the fluid control in the casing, and the casing is attached to a fluid pipe so that the support base abuts on the side of the fluid pipe facing the cutter member, and then the cutter The fluid pipe is cut by a member, and the support base is recovered from the housing by detachably coupling the recovery means to the recovery means provided on the support base.
According to this feature, the support base abuts and supports the fluid pipe at a position facing the cutter member in the housing with respect to the cutter member that advances in the radial direction of the fluid pipe to cut the fluid pipe. The base receives not only the force by which the cutter member presses the fluid pipe in order to cut the fluid pipe, but also can suppress deformation of the fluid pipe at the time of cutting the fluid pipe. Since the support base can be recovered from the housing by detachably coupling the recovery means, the fluid control can be installed in the housing without hindrance while allowing the support base to be reused.

The fluid pipe cutting method of the present invention comprises:
The to-be-recovered means is a through-hole penetrating the support base in the advancing / retreating direction of the cutter member, and the collecting means is a locking portion that is locked to the through-hole by being inserted into the through-hole. It is characterized by having.
According to this feature, since the latching portion is engaged with the through hole in a state of being inserted into the through hole, the latching portion is strongly latched to the to-be-collected means, and from the collecting means of the support base. Can be prevented from falling off.

The fluid pipe cutting method of the present invention comprises:
The support base is engaged with the housing by a plurality of engagement means that can be removed in the retracting direction of the collecting means.
According to this feature, since the support base can be fixed to the installation position of the fluid control against the fluid pressure of the fluid by the engagement means, the recovery means locked by the recovery means after the fluid pipe is cut. Since the position is prevented from shifting and the engagement of the support base with the housing is released by retreating the recovery means while being locked to the recovery target means, the support base can be easily It can be recovered from within the housing.

FIG. 3 is a front cross-sectional view illustrating a state where a housing is attached to the fluid pipe in the first embodiment. It is side sectional drawing which shows the state by which the housing | casing was attached to the fluid pipe | tube. It is a partially broken cross-sectional top view which shows the state by which the housing | casing was attached to the fluid pipe | tube. It is a partially broken side sectional view showing a state where a cutter member is arranged above a fluid pipe. It is a sectional side view which shows the state which the cutter member has cut | disconnected the fluid pipe | tube. It is front sectional drawing which shows the state with which the collection | recovery apparatus hold | maintained the support stand. It is a sectional side view which shows the state with which the collection | recovery apparatus hold | maintained the support stand. It is a sectional side view which shows the state which inserts and arranges a fluid control in a housing | casing. It is a sectional side view which shows the state which inserted and arrange | positioned the fluid control in the housing | casing.

  A mode for carrying out a fluid pipe cutting method according to the present invention will be described below based on an example.

  The fluid pipe cutting method according to the first embodiment will be described with reference to FIGS. As shown in FIGS. 1 and 2, the fluid pipe 1 of the present embodiment is made of a resin pipe such as high-density polyethylene formed in a substantially cylindrical shape, extends in a substantially horizontal direction, and has a fluid inside. Water is flowing. For example, as shown in FIGS. 1 and 9, the fluid pipe 1 is configured such that a housing 2 for communicating a new bypass pipe 12 with the fluid pipe 1 is sealed at a predetermined position. The fluid pipe 1 is cut in the casing 2 by a cutter member 52 (see FIGS. 4 and 5), which will be described later, and the fluid control fluid 11 inserted and arranged in the casing 2 is operated to rotate. The flow path can be switched between the fluid pipe 1 and the bypass pipe 12.

  The material of the fluid pipe 1 is not limited to high density polyethylene, but may be other polyolefin resin or the like. In the present embodiment, the fluid in the fluid pipe 1 is clean water, but the fluid flowing in the fluid pipe 1 is not necessarily limited to clean water, and may be, for example, industrial water or sewage, or gas. Or a fluid pipe through which a fluid in a gas-liquid mixed state flows may be used.

  As shown in FIGS. 1 and 2, a housing 2 fixedly attached to the outer peripheral surface 1 a of the fluid pipe 1 is disposed from above with respect to the fluid pipe 1 and covers the upper side of the outer circumference of the fluid pipe 1. 1 case 3 and the 2nd case 4 which is arrange | positioned from the downward direction with respect to the fluid pipe | tube 1 and coat | covers the outer periphery of the fluid pipe | tube 1 is comprised. The first case 3 and the second case 4 are made of a metal material such as cast iron.

  In addition, the first case 3 includes a pair of contact portions 3 a that are in contact with the outer circumferential surface 1 a of the fluid pipe 1 along the pipe shaft direction along the pipe shaft direction. On the inner wall of each contact portion 3a that faces the outer peripheral surface 1a of the fluid pipe 1, a water stop member 20a that contacts the outer peripheral surface 1a of the fluid pipe 1 along the substantially entire length in the circumferential direction of the first case 3 is a fluid. A pair is provided along the tube axis direction of the tube 1.

  Between the contact portions 3a and 3a of the first case 3, a substantially circular circumferential surface 3h is formed in a plan view facing inward of the first case 3. A branch port 3g is formed at an upper portion of the circumferential surface 3h so as to extend upward along the tube axis direction of the fluid pipe 1 so as to be substantially orthogonal to the pipe axis of the fluid pipe 1. The branch port 3g is formed to penetrate in the vertical direction, and an upper flange 3i is formed at the upper end of the branch port 3g. Further, flanges 3n formed to project toward the outer diameter direction of the fluid pipe 1 at both ends of the fluid pipe 1 in the first case 3 have a substantially semicircular arc shape when viewed from the front. Thus, it extends over the circumferential direction of the first case 3.

  As shown in FIG. 1, at a substantially central portion in the tube axis direction of the fluid pipe 1 of the first case 3, a half cylinder portion 3 e having a semicircular arc shape in a side sectional view is a horizontal direction that is an outer diameter direction of the fluid pipe 1. It is formed to project toward. On the inner wall of the semi-cylindrical portion 3e, there is provided a water stop member 20b that comes into contact with the outer peripheral surface 12a of the bypass pipe 12 as will be described later along the substantially entire length in the circumferential direction. Further, at the end of the semi-cylindrical portion 3e, a flange 3r formed to protrude toward the outer diameter direction of the semi-cylindrical portion 3e extends over the circumferential direction of the semi-cylindrical portion 3e so that the housing 2 forms a substantially semicircular arc shape. It is extended.

  As shown in FIG. 1 and FIG. 8, the fluid control 11 is easily inserted into the housing 2 at both end portions in the tube axis direction of the fluid tube 1 of the half tube portion 3 e in the first case 3. Flat surfaces 3 j and 3 k that are inclined downward are formed from the circumferential surface 3 h to the lower end of the first case 3. Further, as shown in FIG. 1, in the same manner as the flat surfaces 3 j and 3 k, the fluid control 11 can be easily inserted into the housing 2 on the inner wall facing the half cylinder portion 3 e in the first case 3. A flat surface 3m that is inclined downward is formed from the circumferential surface 3h to the lower end of the first case 3.

  As shown in FIGS. 1 and 2, the first case 3 has a pair of flanges 3c and 3c (one is not shown) facing the outer diameter direction of the fluid pipe 1 continuously to the contact portion 3a. Is formed so as to protrude along the pipe axis direction of the fluid pipe 1. The other flange 3c (not shown) is formed so as to form a pair of substantially L-shapes in plan view from both end portions in the tube axis direction of the fluid pipe 1 of the first case 3 along the half cylinder portion 3e.

  The second case 4 is provided with an abutting portion 4 a that has substantially the same width dimension in the tube axis direction of the fluid pipe 1 as the first case 3 and abuts on the outer peripheral surface 1 a at the lower part of the fluid pipe 1. On the inner wall of the contact portion 4a facing the outer peripheral surface 1a of the fluid pipe 1, a water stop member 20c that contacts the outer peripheral surface 1a of the fluid pipe 1 along the substantially entire length in the circumferential direction of the second case 4 is provided. A pair is provided along the direction of one tube axis. Further, flanges 4n formed to project toward the outer diameter direction of the fluid pipe 1 at both ends of the fluid pipe 1 in the second case 4 have a substantially semicircular arc shape when viewed from the front. Thus, it extends over the circumferential direction of the second case 4.

  In addition, a semi-cylindrical portion 4e having a semicircular arc shape in a side sectional view is formed in a substantially central portion in the tube axis direction of the fluid pipe 1 of the second case 4 so as to protrude toward the horizontal direction that is the outer diameter direction of the fluid pipe 1. Has been. On the inner wall of the semi-cylindrical portion 4e, there is provided a water stop member 20d that abuts on the outer peripheral surface 12a of the bypass pipe 12 as will be described later along substantially the entire length in the circumferential direction. The water stop member 20d and the water stop members 20c and 20c are integrally formed continuously through a water stop member 24 described later.

  At the end of the semi-cylindrical part 4e, a flange 4r formed to project toward the outer diameter direction of the semi-cylindrical part 4e extends in the circumferential direction of the semi-cylindrical part 4e so as to form a substantially semicircular arc shape in the housing 2. It is installed. The projecting dimensions of the flanges 3n, 3r, 4n, and 4r from the contact portions 3a and 4a and the half cylinder portions 3e and 4e are all the same.

  As shown in FIG. 1 and FIG. 8, the fluid control 11 is easily inserted into the housing 2 at both end portions in the tube axis direction of the fluid tube 1 of the half tube portion 4 e in the second case 4. Flat surfaces 4j and 4k that are inclined downward are formed from the upper end portion of the second case 4 to the lower portion.

  Further, the inner wall facing the half cylinder portion 4e in the second case 4 is inclined downward so that the fluid control 11 can be easily inserted into the housing 2 in the same manner as the flat surfaces 4j and 4k. A flat surface 4m is formed from the upper end portion of the second case 4 to the lower portion. Furthermore, these flat surfaces 4j, 4k, 4m are extended to the inner bottom of the second case 4 and intersect horizontally. On the flat surfaces 4j, 4k, and 4m that intersect at the inner bottom of the second case 4, a fluid control 11 is arranged as will be described later.

  As shown in FIGS. 1 and 2, the second case 4 has a pair of flanges 4c and 4c (one is not shown) facing the contact portion 4a and facing the outer diameter direction of the fluid pipe 1. Is formed so as to protrude along the pipe axis direction of the fluid pipe 1. Further, the other flange 4c (not shown) is formed so as to form a pair of substantially L shapes in plan view along the half tube portion 4e from both ends in the tube axis direction of the fluid pipe 1 of the second case 4. .

  As described above, the housing 2 constituted by the first case 3 and the second case 4 has flanges 3n, 4n, which are ends of the fluid pipe 1 in the housing 2 in the axial direction in the present embodiment. The flange 3n, 4n and the mounting member 22 made of a resin material attached to the flanges 3r, 4r, which are the end portions of the half cylinders 3e, 4e, are fixed to the fluid pipe 1 so as to be immovable. Yes. The mounting members 22 attached to the flanges 3n, 4n, 3r, 4r have the same configuration, and only the mounting member 22 attached to the flange 3n will be described.

  As shown in FIG. 2, the attachment member 22 is formed in a substantially semicircular arc shape having an inner diameter substantially the same as the outer diameter of the fluid pipe 1 and the bypass pipe 12. This attachment member 22 has a fusion part 22a in which a heating wire 22b as a heating part in the present invention, which generates heat when an electric current flows inside, is disposed over substantially the entire length in the circumferential direction of the attachment member 22. Yes. Each end of the heating wire 22b is connected to a connecting portion 23 provided on the outer surface of the mounting member 22 so as to be electrically connected to an external power source. Further, the attachment member 22 is formed with a fitting space 22e (see FIG. 1) having substantially the same shape as the flange 3n.

  As shown in FIGS. 1, 2 and 3, the second case 4 in this embodiment is in contact with the lower part of the fluid pipe 1 when the fluid pipe 1 is cut, and the fluid pipe 1 is viewed from below. A support base 40 to be supported is arranged. The upper portion of the support base 40 includes a support portion 40a having a horizontal surface that comes into contact with the outer peripheral surface 1a of the fluid pipe 1 from below in order to support the fluid pipe 1 from below. The support portion 40a is formed with a through-hole 40b as a recovery target in the present invention in the vertical direction.

  A pair of leg portions 40c, 40c extend downward from both ends of the fluid pipe 1 in the support portion 40a in the tube axis direction, and the end on the flat surface 4m side of the second case 4 in the support portion 40a. From the portion, a leg portion 40d extends downward. Further, a pair of extending portions 40e, 40e are extended downward from both ends of the leg portion 40d in the tube axis direction of the fluid pipe 1. And the leg part 40f is extended toward the downward direction from the edge part by the side of the half cylinder part 4e of the 2nd case 4 in the support part 40a.

  Of these, the leg 40c on one side is in contact with the inner bottom of the second case 4 between the flat surfaces 4j and 4m, and the leg 40c on the other side is the second between the flat surfaces 4k and 4m. It comes into contact with the inner bottom of the case 4. Further, the leg portion 40d has a lower end portion disposed above the flat surface 4m, and one extending portion 40e abuts against the inner bottom portion of the second case 4 between the flat surfaces 4j and 4m, and the other side. The extended portion 40e is in contact with the inner bottom portion of the second case 4 between the flat surfaces 4k and 4m.

  The leg portion 40f comes into contact with the inner bottom portion of the second case 4 between the flat surfaces 4j and 4k. That is, the support base 40 in the present embodiment is disposed so as to abut on the second case 4 while avoiding the flat surfaces 4j, 4k, 4m that are horizontally intersecting at the inner bottom of the second case 4. It has become.

  A concave portion 4p is formed upward between the flat surfaces 4j and 4k, between the flat surfaces 4k and 4m, and between the flat surfaces 4j and 4m in the inner bottom portion of the second case 4. In these recesses 4p, a fixing pin 6 as an engaging means in the present invention facing upward is inserted so as to protrude from the inner bottom portion (in this embodiment, it is inserted into the insertion hole 40g of the leg portion 40f). Only the fixing pin 6 is shown). Further, the extending portions 40e and 40e and the leg portion 40f of the leg portion 40d are formed with insertion holes 40g through which the fixing pins 6 are inserted. For this reason, the support base 40 in the present embodiment is arranged in the second case 4 so that the fixing pin 6 is inserted into each insertion hole 40g and the position in the second case 4 is fixed. Yes.

  As shown in FIG. 4, the cutter member 52 includes a cylindrical body 53 that is open toward the lower side with a larger diameter than the fluid pipe 1 at the end on the fluid pipe 1 side. A blade 53a for cutting the fluid pipe 1 is formed at the end of the cylindrical body 53 on the fluid pipe 1 side. In addition, an infinite number of flow holes 53 b that penetrate the wall surface of the cylindrical body 53 are formed on the wall surface of the cylindrical body 53.

  Note that a holding plate pivotally supported by a pivot that faces the tube axis direction of the fluid pipe 1 is orthogonal to the tube axis direction of the fluid pipe 1 at the lower end portion in the cylindrical body 53 of the present embodiment. A pair is provided so as to face each other in the direction in which they are directed. Both the holding plates can be turned upward around the pivot, with the horizontal direction being the lower limit. Further, a contact plate (not shown) that contacts the outer peripheral surface 1 a of the fluid pipe 1 when the fluid pipe 1 is cut is disposed in the cylindrical body 53. The contact plate is urged by a coil spring from the upper end portion in the cylindrical body 53 toward the fluid pipe 1, and can move in the vertical direction within the cylindrical body 53 while receiving the urging force of the coil spring. Yes.

  In order to cut the fluid pipe 1 using the casing 2, the support base 40, and the cutter member 52 configured as described above, first, as shown in FIGS. 1 and 3, the support base 40 in the second case 4. As described above, the flat surfaces 4j, 4k, and 4m are avoided and arranged on the inner bottom portion of the second case 4. At the same time, each fixing pin 6 is inserted into the insertion hole 40g, and the support base 40 is fixed so as not to be displaced by the fluid pressure of the fluid after the fluid pipe 1 is cut.

  Next, in the 1st case 3, the fitting space 22e of the attachment member 22 is unevenly fitted to the flange 3n. Furthermore, the mounting member 22 and the flange 3n are locked by the locking pin 21, so that the mounting member 22 is mounted so as not to move relative to the flange 3n. Thereafter, the attachment members 22 are similarly attached to the other flanges 3r, 4n, and 4r of the first case 3 and the second case 4.

  Next, as shown in FIG. 1, the first case 3 to which the attachment member 22 is attached is disposed at the upper part on one end side of the fluid pipe 1 and the bypass pipe 12. Then, by disposing the second case 4 from below with respect to the fluid pipe 1 with the water stop member 24 disposed between the flanges 3c, 4c, as shown in FIG. 2, the flange 3c of the first case 3 is disposed. , 3c and the flanges 4c, 4c of the second case 4 are opposed to each other, and the opposed flanges 3c, 4c are fastened by bolts and nuts 25, whereby the casing 2 is fixed to the fluid pipe 1 and the bypass pipe 12. And temporarily fix. By tightening the flanges 3c and 4c with bolts and nuts 25, the support portion 40a of the support base 40 comes into contact with the outer peripheral surface 1a of the fluid pipe 1 from below.

  At this time, each water-stop member 20a, 20c and water-stop member 20b, 20d, the both ends in the circumferential direction of the water-stop members 20a, 20b are in close contact with the both ends in the circumferential direction of the water-stop members 20c, 20d, The water stop members 20a and 20c and the water stop members 20b and 20d are formed in an annular shape, and between the outer peripheral surface 1a and the contact portions 3a and 3a of the fluid pipe 1 and the outer peripheral surface 12a and the branching portion 2a of the bypass pipe 12. Seal the gap.

  Further, between the housing 2 and the fluid pipe 1 and the bypass pipe 12, the water stop member 24 is elastically deformed between the flanges 3c and 4c, so that the flanges 3c and 4c are formed on the water stop member 24 over substantially the entire length. The water stop members 20a are in close contact with each other between the contact portions 3a, 4a and the outer peripheral surface 1a of the fluid pipe 1 and between the half cylinder portions 3e, 4e and the outer peripheral surface 12a of the bypass pipe 12. The fluid pipe 1 is sealed by being in close contact over substantially the entire length of the outer peripheral surface 1a and the half cylinder portions 3e and 4e of the fluid pipe 1 and the outer peripheral surface 12a of the bypass pipe 12.

  As shown in FIGS. 1 and 7, the flat surfaces 3j and 4j are configured as a continuous surface 2b having no discontinuous surfaces such as protrusions and steps. Similarly, the flat surfaces 3k and 4k and the flat surfaces 3m and 4m are also configured as continuous surfaces 2c and 2d, respectively.

  The fused portion 22 a of the attachment member 22 attached to each of the flanges 3 n and 4 n is in contact with the outer peripheral surface 1 a of the fluid pipe 1 over substantially the entire length in the circumferential direction of the fluid pipe 1. Similarly, the fused portion 22a of the attachment member 22 attached to the flanges 3r and 4r contacts the outer peripheral surface 12a of the bypass pipe 12 over substantially the entire length in the circumferential direction of the bypass pipe 12. Moreover, both the half cylinder parts 3e and 4e comprise the branch part 2a which branches toward the side of the housing | casing 2, when the flanges 3c and 3c and the flanges 4c and 4c are opposingly arranged.

  Next, a power cable connected to an external power source (not shown) is connected to the connection portion 23 of each mounting member 22 attached to the flanges 3n, 4n, and power is supplied from the external power source for a predetermined time. When the heated heating wire 22b is heated to a high temperature, the fused portion 22a made of a resin material and the outer peripheral surface 1a of the fluid pipe 1 are heated and gradually melted.

  The melted fused portion 22a and the outer peripheral surface 1a of the fluid pipe 1 are mixed with each other, and the heat generated by the heating wire 22b is stopped and integrated to solidify by lowering to room temperature. And fixed immovable.

  Further, the external power source is connected to the connection portion 23 of the attachment member 22 attached to the flanges 3r and 4r in the same manner as between the fusion portion 22a of the attachment member 22 attached to the flanges 3n and 4n and the outer peripheral surface 1a of the fluid pipe 1. And the connecting portion 23 is connected to cause the heating wire 22b to generate heat, so that the fusion bonding portion 22a and the outer peripheral surface 12a of the bypass pipe 12 are melted, and the heat generation of the heating wire 22b is stopped to be melted. 22a and the outer peripheral surface 12a of the bypass pipe 12 are integrated and solidified. Thus, the attachment of the housing 2 to the fluid pipe 1 is completed.

  Next, as shown in FIGS. 4 and 5, the upper case 35 in which the working valve 36 and the cutting device 50 are disposed is connected to the upper flange 3i of the branch port 3g in a watertight manner. The cutting device 50 includes a shaft member 51 connected to a driving means (not shown) and extending in the axial direction toward the fluid pipe 1 in the branch port 3g, and the cutter member 52 connected to the lower end portion of the shaft member 51. It is mainly composed. Among these, the upper case 35 is provided with a water injection valve for venting air (not shown).

  The cutting device 50 configured as described above advances the shaft member 51 toward the fluid pipe 1 after replacing the air in the housing 2 and the upper case 35 with water by pouring water through the water filling valve, The blade 53a of the cutter member 52 and the contact plate are brought into contact with the outer peripheral surface 1a of the fluid pipe 1. Then, as the cutter member 52 continues to advance in the axial direction of the shaft member 51, the cutter member 52 continuously presses the outer peripheral surface 1a of the fluid pipe 1 by the contact plate, and the contact plate The position of the cutter member 52 with respect to the fluid pipe 1 is fixed by the frictional force generated between the fluid pipe 1 and the outer peripheral surface 1a of the fluid pipe 1.

  Thereafter, the abutting plate stays at a position where it abuts on the outer peripheral surface 1a of the fluid pipe 1 while receiving a biasing force from the coil spring when the cutter member 52 is further advanced. During this time, the cylindrical body 53 sequentially cuts the fluid pipe 1 downward by the blade portion 53a.

  At this time, the fluid pipe 1 receives a pressing force from the cutter member 52 as the cutter member 52 cuts the fluid pipe 1 from the upper side to the lower side, but the support base 40 attaches the fluid pipe 1 to the cutter member 52. Since it is supported against the pressing force, deformation due to the pressing force from the cutter member 52 is prevented.

  Further, as the cutting of the fluid pipe 1 proceeds, the flow holes 53 b are arranged in the fluid pipe 1. For this reason, since the flow path of the fluid is secured by the flow hole 53b in the fluid pipe 1 being cut by the cutter member 52, a part of the fluid flowing in the fluid pipe 1 passes through the flow hole 53b. Thus, the turbulent flow generated by the fluid flowing through the cylindrical body 53 and coming into contact with the cylindrical body 53 and the fluid pressure received by the cylindrical body 53 from the fluid can be kept small.

  At the same time, the pair of holding plates disposed in the cylindrical body 53 comes into contact with the outer peripheral surface 1a of the fluid pipe 1 and gradually rotates upward as the cutting of the fluid pipe 1 proceeds. To go. Then, when the cutting of the fluid pipe proceeds by a predetermined amount, the pair of holding plates return to their original horizontal positions.

  And the location cut | disconnected by the completion | finish of cutting | disconnection of the fluid pipe | tube 1 by the blade part 53a will be cut | disconnected from the fluid pipe | tube 1, and will become the slice 1b. The upper portion of the slice 1b is pressed downward by the urging force of the coil spring through the contact plate, and the lower portion contacts the pair of holding plates facing in the horizontal direction. For this reason, the slice 1b is held between the pair of holding plates and the contact plate in the cylindrical body 53, and is prevented from dropping out of the cylindrical body 53.

  Next, the shaft member 51 is retracted, and the cutter member 52 holding the section 1b is moved from the inside of the housing 2 into the upper case 35. After the cutter member 52 is housed in the upper case 35 due to the retraction of the shaft member 51, the casing 2 is closed in a watertight manner by sliding the work valve 36, and the cutter member 52 is removed from the upper case 35. The cutting of the fluid pipe 1 by the cutting device 50 is finished.

  After the cutter member 52 is removed from the upper case 35, the support table recovery device 70 is attached to the housing 2 as shown in FIGS. 6 and 7. As described above, the support table recovery device 70 is the casing 2 attached to the fluid pipe 1, the shaft member 51, and the recovery means in the present invention attached to the tip of the shaft member 51 in place of the cutter member 52. The recovery body 71 is mainly configured.

  Among these, the collection body 71 is formed to have an outer diameter that can be inserted into the through hole 40 b formed in the support base 40. Further, a recess (not shown) that opens toward the outer diameter direction of the recovery body 71 is formed in the recovery body 71, and a recovery pin 71b as a locking portion in the present invention is horizontally disposed in the recess. It is pivotally supported by a pivot 71a that faces the direction. For this reason, the recovery pin 71b is configured to protrude toward the outer diameter direction of the recovery body 71 by rotating around the pivot 71a.

  In order to recover the support base 40 from the housing 2 by the support base recovery device 70 configured as described above, the housing 2 is opened by sliding the work valve 36 as shown in FIGS. Then, fluid is filled in the housing 2 and the upper case 35. Then, after closing the water injection valve, the shaft member 51 is advanced into the housing 2, and the collection body 71 is inserted into the through hole 40 b of the support base 40.

  Then, by inserting the collection body 71 through the through hole 40b for a predetermined distance, the collection pin 71b is rotated outside the collection body 71 around the pivot 71a below the support portion 40a. In this state, the shaft member 51 is retracted toward the upper case 35.

  At this time, since the recovery pin 71b is engaged with the periphery of the lower end portion of the through hole 40b in the support portion 40a in a barbed shape, the support base 40 is engaged with the recovery pin 71b of the recovery body 71 that retreats together with the shaft member 51. In this state, the second case 4 is separated from the inner bottom portion. The fixing pins 6 provided on the inner bottom portion of the second case 4 and the insertion holes 40g formed in the leg portions 40d and 40f are both directed upward, which is the retraction direction of the collection body 71, so that it is easy. Further, the support base 40 can be separated from the inner bottom portion of the second case 4.

  Subsequently, after the support base 40 is stored from within the housing 2 by continuously retracting the shaft member 51 toward the upper case 35, the housing 2 is closed in a watertight manner by sliding the work valve 36. At the same time, the recovery body 71 and the support base 40 are removed from the upper case 35, and the recovery of the support base 40 by the support base recovery device 70 is finished.

  After removing the recovery body 71 and the support base 40 from the upper case 35, as shown in FIG. 8 and FIG. 9, the fluid control installation device 60 is attached to the housing 2, and the fluid control 11 is installed in the housing 2. To do. As described above, the fluid control installation device 60 includes the housing 2 attached to the fluid pipe 1, the shaft member 51, and the fluid control 11 that is fixedly installed at the tip of the shaft member 51 and inserted into the housing 2. And an upper case 35 that accommodates the fluid control 11.

  Among these, the fluid control 11 is mainly composed of a valve box 13 and a valve main body (not shown) that is pivotally supported by a pivot 15 that faces in the vertical direction in the valve box 13. In the upper part of the valve box 13, an annular annular seal portion 16 a that can be in close contact with the entire circumference of the circumferential surface 3 h of the housing 2 is formed. Further, the valve box 13 is provided with a seal portion 16b that can be brought into close contact with the entire length of the flat surfaces 3j and 4j and extends downward from the annular seal portion 16a.

  Similarly to the seal portion 16b, the valve box 13 includes a seal portion 16c that can be in close contact over the entire length of the flat surfaces 3k and 4k and a seal portion 16d that can be in close contact over the entire length of the flat surfaces 3m and 4m, respectively. It extends downward from the portion 16a. The seal portions 16b, 16c, and 16d intersect at the bottom of the valve box 13 in a horizontal manner.

  On the other hand, the valve main body rotates the pivot 15 so that the valve body 13 slides in contact with the inner wall of the valve box 13 while the fluid pipe 1 is upstream and downstream, or the fluid pipe 1 is upstream. It is possible to selectively communicate with the bypass pipe 12.

  In order to insert and arrange the control fluid 11 configured in this way into the housing 2, the housing 2 is opened by sliding the work valve 36, as shown in FIGS. The inner and upper cases 35 are filled with fluid. Then, after closing the water injection valve, the shaft member 51 having the fluid control 11 fixed at the tip is advanced toward the inside of the housing 2. At this time, the pivot operating portion 15 a is inserted and disposed in the distal end portion of the shaft member 51.

  By causing the shaft member 51 to advance toward the inside of the housing 2, the annular seal portion 16 a is brought into close contact with the entire circumference of the circumferential surface 3 h of the housing 2. At the same time, the flat surfaces 3j and 4j and the seal portion 16b, the flat surfaces 3k and 4k and the seal portion 16c, and the flat surfaces 3m and 4m and the seal portion 16d are brought into close contact with each other, and the valve box 13 and the housing 2 are kept watertight. By doing so, the fluid control 11 is inserted into the housing 2. Since the support base 40 is disposed on the inner bottom portion of the second case 4 while avoiding the flat surfaces 4j, 4k, 4m when the fluid pipe 1 is cut, the support base 40 is applied to the flat surfaces 4j, 4k, 4m. The flat surface 4j and the seal portion 16b, the flat surface 4k and the seal portion 16c, and the flat surface 4m and the seal portion 16d can be satisfactorily adhered without forming scratches or irregularities due to contact.

  After the fluid control 11 is inserted and arranged in the housing 2, the fluid in the upper case 35 is drained, and then the operator puts a hand through an operation port (not shown) provided in the upper case 35, whereby the shaft member 51. Remove the fluid control 11 from Finally, after removing the upper case 35 from the housing 2, the lid body 17 is disposed on the upper flange 3 i, and the lid body 17 and the upper flange 3 i are tightened with the bolts and nuts 18. The lid body 17 is formed with a through hole 17a penetrating in the vertical direction, and the pivot operation section 15a is inserted into the through hole 17a so that the pivot operation section 15a is located above the lid body 17. Protrusively arranged.

  By tightening the lid body 17 and the upper flange 3i with bolts and nuts 18, the control fluid 11 is pressed downward by the lid body 17, and the circumferential surface 3h, the annular seal portion 16a, the flat surfaces 3j, 4j And the seal portion 16b, the flat surfaces 3k and 4k, the seal portion 16c, the flat surfaces 3m and 4m, and the seal portion 16d are more securely adhered to each other, and the damping fluid 11 is fixed in the casing 2, and the casing of the damping fluid 11 is fixed. The insertion arrangement in 2 is finished.

  In this embodiment, the fluid pipe 1 is cut by the cutter member 52 while the fluid pipe 1 is supported from below by the support base 40 in the housing 2, and then the support base 40 is collected from the housing 2. When the fluid pipe 1 has a plurality of cutting points, the recovered support base 40 is installed in the second case 4 attached to the cutting position of the new fluid pipe, so that the fluid can be repeatedly used by the same support base 40. The fluid pipe 1 can be supported when the pipe 1 is cut.

  Thereafter, when the operator attaches a handle or the like to the pivot operating portion 15a and rotates the valve body, the fluid control 11 passes through the fluid flow path formed from the upstream side to the downstream side of the fluid pipe 1. The fluid pipe 1 can be switched to communicate with the bypass pipe 12 from the upstream side.

  As described above, in the method for cutting the fluid pipe 1 in the present embodiment, the support base 40 is disposed at the installation position of the fluid control 11 in the housing 2, and the support base 40 is attached to the fluid pipe 1 by attaching the housing 2 to the fluid pipe 1. Is brought into contact with the side of the fluid pipe 1 facing the cutter member 52, the fluid pipe 1 is cut by the cutter member 52, and the recovery body 71 is detachably coupled to the recovery means provided on the support base 40. By collecting the support base 40 from the inside of the casing 2, the support base 40 is inside the casing 2 with respect to the cutter member 52 that moves in the radial direction of the fluid pipe 1 in order to cut the fluid pipe 1. Since the fluid pipe 1 is abutted and supported at the position facing the cutter member 52 in the above, the support base 40 receives the force that the cutter member 52 presses the fluid pipe 1 in order to cut the fluid pipe 1, and the fluid pipe 1 is cut. The deformation of the fluid pipe 1 at the time In addition, the support base 40 can be recovered from the housing 2 by detachably coupling the recovery body 71 and the recovery target provided on the support base 40, so that the support base 2 can be reused. However, the fluid control 11 can be installed in the housing 2 without hindrance.

  Further, the means to be collected is a through hole 40b that penetrates the support base 40 in the forward and backward direction of the cutter member 52, and the collection body 71 is collected by being inserted into the through hole 40b and locked to the through hole 40b. Since the pin 71b is provided, the recovery pin 71b is locked to the through hole 40b in a state of being inserted into the through hole 40b, so that the recovery pin 71b is strongly locked to the through hole 40b. It is possible to prevent the 40 recovery bodies 71 from falling off.

  Further, since the support base 40 is engaged with the housing 2 by a plurality of fixing pins 6 that can be removed in the retracting direction of the recovery body 71, the support base 40 is fluidized by the fixing pins 6. Since it can be fixed to the installation position of the fluid control 11 against the pressure, the position of the through hole 40b locked by the recovery body 71 after the fluid pipe 1 is cut is prevented and the recovery body 71 is also prevented. Since the engagement with the housing 2 by the fixing pin 6 of the support base 40 is released by retreating in a state in which the support base 40 is locked in the through hole 40b, the support base 40 can be easily recovered from within the housing 2. it can.

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

  For example, in the above-described embodiment, the through hole 40b for inserting the recovery body 71 is formed in the support base 40, and the recovery pin 71b is rotated out of the recovery body 71 from the recovery body 71 inserted through the through hole 40b. As a result, the support pin 40 is recovered from the inside of the housing 2 by locking the recovery pin 71b to the lower portion of the through hole 40b, but a male screw is screwed into the lower end portion of the shaft member 51 as the recovery means. Alternatively, the male screw part may be provided, and after the male screw part is screwed into the support base 40, the shaft member 51 may be retracted to recover the support base 40 from the inside of the housing 2.

  Moreover, in the said Example, the through-hole 40b for allowing the collection body 71 to be penetrated is formed in the support stand 40, and the collection | recovery pin 71b is rotated out of the collection body 71 from the collection body 71 inserted in this through-hole 40b. Thus, the recovery base 71 is recovered from the inside of the housing 2 by locking the recovery pin 71b to the lower portion of the through hole 40b. However, the recovery pin 71b is removed from the inside of the recess by the coil spring or the like. The collection pin 71b is energized in the radial direction, and when the through hole 40b of the collection body 71 is inserted, the collection pin 71b is pressed against the peripheral wall of the through hole 40b so as to be accommodated in the recess. After the body 71 is inserted through the through hole 40b, the recovery pin 71b may be automatically protruded toward the outer diameter side of the recovery body 71 by the biasing force of the coil spring and locked to the lower portion of the through hole 40b.

  Moreover, in the said Example, the through-hole 40b for allowing the collection body 71 to be penetrated is formed in the support stand 40, and the collection | recovery pin 71b is rotated out of the collection body 71 from the collection body 71 inserted in this through-hole 40b. Thus, the recovery base 71 is recovered from the housing 2 by locking the recovery pin 71b to the lower part of the through hole 40b. However, the recovery body 71 and the support portion 40a are provided with a magnetic body, The support base 40 may be recovered from the housing 2 by magnetizing the body.

  In the above embodiment, the fluid pipe 1 is cut by the cutter member 52 and the section 1b is collected from the inside of the housing 2, and then the support base 40 is collected from the inside of the housing 2 by the support base collecting device 70. In place of the holding plate and the abutting plate, a drill capable of rotating in the horizontal direction for holding the section 1b by penetrating a portion that becomes the section 1b when the fluid pipe 1 is cut is provided in the cylindrical body 53. The support 40 may be recovered from the inside of the housing 2 together with the collection of the section 1b by drilling the support 40a in order to lock the support 40 with a drill.

  Further, in the above embodiment, the fluid control 11 is constituted by the valve box 13 and a valve body (not shown), and the flow path of the fluid is switched by moving the valve body in the valve box 13. The fluid may be composed of, for example, a gate valve, an emergency shut-off valve, or a plug, and only one of the upstream side and the downstream side of the fluid pipe 1 is closed to close only the fluid flow path. Also good.

  Moreover, in the said Example, although the housing | casing 2 was attached to the fluid pipe | tube 1 by heat-seal | fitting the attachment member 22 with respect to the fluid pipe | tube 1, the blade part which faces the internal diameter side of the fluid pipe | tube 1 to the housing | casing 2 is provided. The housing 2 may be attached to the fluid pipe 1 by arranging a plurality of latching bodies and pressing the latching body so that the blade portion bites into the outer peripheral surface 1 a of the fluid pipe 1.

1 fluid pipe 1b section 6 fixing pin (engagement means)
11 Fluid Control 40 Support Base 40a Support Part 40b Through-hole (Measuring means)
40 g Insertion hole 52 Cutter member 53 Cylindrical body 71 Recovery body (recovery means)
71b Recovery pin (locking part)

Claims (3)

In a casing that is hermetically attached to the fluid pipe, the fluid control is performed by cutting the fluid pipe in an uninterrupted state by advancing the cutter member in the radial direction of the fluid pipe, and controlling the flow of fluid in the casing. A fluid pipe cutting method for installing
A support base is disposed at the installation position of the fluid control in the casing, and the casing is attached to a fluid pipe so that the support base abuts on the side of the fluid pipe facing the cutter member, and then the cutter The fluid pipe is cut by a member, and the support base is recovered from the housing by detachably coupling the recovery means to the recovery means provided on the support base. Method.   The to-be-recovered means is a through-hole penetrating the support base in the advancing / retreating direction of the cutter member, and the collecting means is a locking portion that is locked to the through-hole by being inserted into the through-hole. The fluid pipe cutting method according to claim 1, comprising:   3. The fluid pipe according to claim 1, wherein the support base is engaged with the housing by a plurality of engagement means that can be removed in a retracting direction of the recovery means. Cutting method.

Images