JP2012251643A - Cutter member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide cutter member capable of smoothly and precisely cutting a fluid pipe.SOLUTION: The cutter member 52 cutting the fluid pipe 1 without stopping flow by advancing in the radial direction of the fluid pipe 1 in the casing body 2 hermetically attached to the fluid pipe 1 has a blade part 53a for cutting the fluid pipe 1 in the end part of the fluid pipe 1 side, and has a communication part 53b for communicating the fluid in the fluid pipe 1, cuts the fluid pipe 1 while securing the flow channel of the fluid by the communication part 53b by pressing the fluid pipe 1 by the blade part 53a, and secures the flow channel of the fluid flowing in the fluid pipe 1 by the communication part 53b being located in the fluid pipe 1 when the cutter member 52 cuts the fluid pipe 1 by the blade part 53a.

Description

  The present invention relates to a cutter member that cuts a fluid pipe in an uninterrupted flow state by advancing in the radial direction of the fluid pipe in a casing that is hermetically attached to the fluid pipe.

  A conventional hole cutter (cutter member) has a cylindrical cylindrical body and a plurality of cutting tips (blade parts) formed along the circumferential direction of the cylindrical body at the tip of the cylindrical body. By moving toward the water pipe (fluid pipe) while rotating the cutter, the water pipe is cut in an uninterrupted state by the cutting tip, and the section generated by cutting the water pipe in the hole cutter is held. (For example, refer patent document 1).

Japanese Patent Laying-Open No. 2006-321022 (page 5, FIG. 1)

  However, in the cutter member described in Patent Document 1, when the hole cutter (cutter member) cuts the water pipe (fluid pipe), the hole cutter not only blocks the fluid flow path in the water pipe. Because the rotation of the hole cutter causes turbulent flow in the fluid flow path, the hole cutter will block the fluid flow path, greatly increasing the drag that the hole cutter receives from the fluid, and cutting the water pipe by the hole cutter In addition, the hole cutter may be deformed and the fluid pipe may not be cut accurately.

  The present invention has been made paying attention to such problems, and an object thereof is to provide a cutter member capable of smoothly and accurately cutting a fluid pipe.

In order to solve the above problems, the cutter member of the present invention is
A cutter member that cuts the fluid pipe in an uninterrupted state by advancing in the radial direction of the fluid pipe in a housing attached to the fluid pipe in a sealed manner,
A blade portion for cutting the fluid tube is provided at the end portion on the fluid tube side, and a circulation portion for circulating the fluid in the fluid tube is provided. It is characterized by cutting the fluid pipe while securing the path.
According to this feature, when the cutter member cuts the fluid pipe with the blade portion, the flow passage is positioned in the fluid pipe so that a flow path of the fluid flowing in the fluid pipe is secured. In addition to being able to suppress the generation of flow, the fluid pressure exerted on the cutter member during cutting of the fluid pipe is reduced, so that the fluid pipe can be smoothly cut by the cutter member. The deformation of the cutter member due to the fluid pressure exerted on the cutter member is suppressed, and the fluid pipe can be cut accurately.

The cutter member of the present invention is
The flow part is characterized by being formed longer than the inner diameter of the fluid pipe from the vicinity of the blade part toward the traveling direction of the cutter member.
According to this feature, since the flow path of the fluid is constantly secured in the cutter member from the start of the cutting of the fluid pipe to the completion of the cutting of the fluid pipe, the pressure that the cutter member receives from the fluid during the cutting of the fluid pipe is increased. It can be continuously reduced.

The cutter member of the present invention is
A reinforcing member for improving the strength of the cutter member is provided in the flow part.
According to this feature, the portion of the cutter member where the weakly flowing portion is formed is reinforced by the reinforcing member, so that the strength of the entire cutter member is improved and the cutter is caused by the force with which the blade portion presses the fluid pipe. The deformation of the member is prevented, and the fluid pipe can be cut more accurately.

The cutter member of the present invention is
A holding means for holding a section of the fluid pipe generated by cutting the fluid pipe is provided at a position where it does not interfere with the blade at the end on the fluid pipe side.
According to this feature, an end portion of the cutter member on the fluid pipe side can be effectively used, and a section generated by the cutter member cutting the fluid pipe can be collected together with the cutter member from the housing.

It is a partially broken sectional view which shows the state by which the cutter member was arrange | positioned above the fluid pipe | tube in an Example. It is a partially broken side sectional view showing a state where a cutter member is arranged above a fluid pipe. It is AA sectional drawing of the cutter member in FIG. It is a partially broken sectional view which shows the state which cut | disconnects a fluid pipe | tube with a cutter member. It is a sectional side view which shows the state which cut | disconnects a fluid pipe | tube with a cutter member. It is a front view which shows the cutter member which cut | disconnected the fluid pipe | tube. It is a partially broken sectional view showing the state where the cutter member and the section are pulled back upward. It is a partially broken side sectional view showing a state where the cutter member and the section are pulled back upward. 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) is front sectional drawing which shows the cutter member and fluid pipe | tube as a modification in a present Example, (b) is a front view which shows the cutter member which cut | disconnected the fluid pipe | tube.

  EMBODIMENT OF THE INVENTION The form for implementing the cutter member which concerns on this invention is demonstrated below based on an Example.

  The cutter member according to the 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. 7 and 10, the fluid pipe 1 is configured so that a housing 2 for communicating a new bypass pipe 12 with the fluid pipe 1 can be sealed in a predetermined place. The fluid flow path can be switched between the fluid pipe 1 and the bypass pipe 12 by rotating the control fluid 11 inserted and arranged in the housing 2.

  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 protrude toward the outer diameter direction of the fluid pipe 1 are provided at both ends of the fluid pipe 1 in the first case 3 on the tube axis direction side over substantially the entire circumference of the first case 3 in the circumferential direction. It is extended.

  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. In addition, a flange 3r is formed at the end of the semi-cylindrical portion 3e so as to protrude toward the outer diameter direction of the semi-cylindrical portion 3e and extends over substantially the entire circumference in the circumferential direction of the semi-cylindrical portion 3e.

  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 3j and 3k that incline downward are formed to bulge from the circumferential surface 3h 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 slopes downward is formed to bulge 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. Furthermore, flanges 4n that are formed to project toward the outer diameter direction of the fluid pipe 1 are provided at both ends of the second case 4 on the pipe axis direction side of the fluid pipe 1 over substantially the entire circumference of the first case 3 in the circumferential direction. It is extended.

  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 portion 4e, a flange 4r formed to project toward the outer diameter direction of the semi-cylindrical portion 4e is extended over substantially the entire circumference in the circumferential direction of the semi-cylindrical portion 4e. 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 incline downward are formed to bulge from the upper end of the second case 4 to the lower part.

  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 to bulge from the upper end of the second case 4 to the lower part. Furthermore, these flat surfaces 4j, 4k, 4m are extended to the inner bottom of the second case 4 and intersect horizontally.

  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. 3 and 6, the cutter member 52 has a cylindrical body 53 having a diameter larger than the outer diameter of the fluid pipe 1 and a bottom surface on the outer peripheral surface 1 a of the fluid pipe 1 when the fluid pipe 1 is cut. An abutting plate 54 that abuts, and a pair of stoppers 55 and 55 as retaining means in the present invention that retains the section 1b generated by cutting the fluid pipe 1 in the cylindrical body 53 are provided.

  Among these, a blade portion 53 a for cutting the fluid tube 1 is formed at the tip of the tubular body 53 on the fluid tube 1 side over the entire circumference in the circumferential direction of the tubular body 53. Further, at both ends of the tubular body 53 on the tube axis direction side of the fluid pipe 1, a pair of penetrating through the peripheral wall of the tubular body 53 toward the tube axis direction side of the fluid pipe 1 as a circulation portion in the present invention. The openings 53b and 53b are formed so that the lower end portion is positioned near the upper portion of the blade portion 53a. As shown in FIG. 6, the vertical width dimension of these openings 53 b and the horizontal width dimension, which is the radial direction of the fluid pipe 1, are formed longer than the inner diameter of the fluid pipe 1.

  The abutting plate 54 is formed in a horizontal plane whose lower end is in contact with the outer peripheral surface 1a of the fluid pipe 1, and the lower end is substantially the same height as the tip of the blade 53a before the fluid pipe 1 is cut. It arrange | positions in the cylindrical body 53 so that it may become a position. A guide bar 54 a that penetrates up to the upper side of the cutter member 52 is provided at the upper end of the contact plate 54, and the contact plate 54 is urged toward the fluid pipe 1 around the guide bar 54 a. A coil spring 54b is disposed. Further, a pair of notches 54c and 54c into which a stopper 55 (to be described later) can be inserted are formed at both ends of the contact plate 54 on the horizontal direction side, which is the radial direction of the fluid pipe 1.

  The stoppers 55 are provided at both ends on the horizontal direction side, which is the radial direction of the fluid pipe 1 on the inner peripheral surface in the lower part of the cylindrical body 53 so as not to interfere with the blade part 53a. The stoppers 55 are pivots 55a attached to the inner peripheral surface of the cylindrical body 53 so as to face the pipe axis direction of the fluid pipe 1, a holding plate 55b pivotally supported by the pivot 55a, It is composed of An offset load is applied to the end of the holding plate 55b facing the horizontal side of the cylindrical body 53 in the downward direction.

  Further, as shown in FIGS. 3 and 6, the holding plate 55b is maintained in the horizontal direction by abutting the end of the holding plate 55b on the inner peripheral surface of the cylindrical body 53. A rotation restricting portion 53c for restricting the downward rotation of 55b is formed to protrude. For this reason, the holding plate 55b is allowed to rotate upward around the pivot 55a, but is restricted from turning downward around the pivot 55a due to an offset load, with the horizontal direction being the lower limit. ing. The width dimension between the holding plates 55b and 55b is formed to be slightly shorter than the outer diameter of the fluid pipe 1.

  In order to cut the fluid pipe 1 using the casing 2 and the cutter member 52 configured in this manner, first, in the first case 3, the fitting space 22e of the mounting member 22 is concavo-convexly fitted to the flange 3n. Let 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.

  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.

  Further, 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. 1 and 2, an upper case 35 having a working valve 36 and a cutting device 50 disposed therein is connected to the upper flange 3i of the branch port 3g in a watertight manner. The cutting device 50 is mainly composed of a shaft member 51 which is connected to a driving means (not shown) and advances in the branch port 3g toward the fluid pipe 1 in the axial direction, and the cutter member 52 described above. Among these, the upper case 35 is provided with a water injection valve for venting air (not shown).

  As shown in FIGS. 4 and 5, the cutting device 50 configured as described above has a shaft member 51 after the water in the housing 2 and the upper case 35 is replaced with water by pouring water through the water filling valve. Is advanced toward the fluid pipe 1 so that the blade part 53a of the cutter member 52 and the lower end part of the contact plate 54 are brought into contact with the outer peripheral surface 1a of the fluid pipe 1.

  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 1 a of the fluid pipe 1 by the contact plate 54, and the contact plate 54. The position of the cutter member 52 relative to the fluid pipe 1 is fixed by the frictional force generated between the lower end of the fluid pipe 1 and the outer peripheral surface 1 a of the fluid pipe 1.

  Thereafter, the contact plate 54 further receives the urging force from the coil spring 54b compressed along the guide rod 54a by further extending the cutter member 52 in the axial direction of the shaft member 51. It stays at the position where it abuts. During this time, the cylindrical body 53 sequentially cuts the fluid pipe 1 downward by the blade portion 53a while inserting the stoppers 55, 55 into the notches 54c, 54c of the contact plate 54.

  As the cutting of the fluid pipe 1 proceeds, the openings 53b and 53b are arranged in the fluid pipe 1 from the lower part to the upper part. For this reason, since the fluid flow path is secured by the openings 53b and 53b in the fluid pipe 1 being cut by the cutter member 52, a part of the fluid flowing in the fluid pipe 1 is opened by the opening 53b. , 53b through the inside of the cylindrical body 53, and the turbulent flow caused by the fluid coming into contact with the cylindrical body 53 and the fluid pressure received by the cylindrical body 53 from the fluid are kept small. be able to.

  At the same time, both holding plates 55b and 55b arranged in the cylindrical body 53 abut against the outer peripheral surface 1a of the fluid pipe 1 and gradually turn upward as the cutting of the fluid pipe 1 progresses. I will do it. And when cutting | disconnection of a fluid pipe | tube progresses a predetermined amount, both the holding plates 55b and 55b return to the position which turned to the original horizontal direction.

  When the cutting of the fluid pipe 1 by the blade 53a is completed, most of the flow-down section of the fluid pipe 1 is disposed in the openings 53b and 53b, and the fluid pressure received by the cylindrical body 53 from the fluid is minimized. Become. Furthermore, the part cut | disconnected by the blade part 53a because the cutting | disconnection of the fluid pipe | tube 1 is completed will be cut | disconnected from the fluid pipe | tube 1, and will become the slice 1b.

  The section 1b is pressed downward against the contact plate 54 by the urging force of the coil spring 54b in the cylindrical body 53. After the section 1b pressed downward on the contact plate 54 falls slightly in the cylindrical body 53, both holding plates 55b and 55b contact the lower portion. For this reason, the slice 1b is held up and down between the contact plate 54 and the holding plates 55b and 55b in the cylindrical body 53 by the biasing force of the coil spring 54b, and may fall off from the cylindrical body 53. Is prevented.

  Next, as shown in FIGS. 7 and 8, the shaft member 51 is retracted, and the cutter member 52 holding the section 1 b is moved from the housing 2 toward 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.

  As described above, since the openings 53b and 53b are formed in the tubular body 53 in the tube axis direction of the fluid pipe 1, the fluid pressure exerted on the cutter member 52 while cutting the fluid pipe 1 is reduced, and the cutter member The fluid pipe 1 can be cut smoothly by the flow 52, and the deformation of the cutter member 52 due to the fluid turbulence and the fluid pressure exerted by the fluid on the cutter member 52 is suppressed, so that the fluid pipe 1 is cut accurately. be able to.

  After the cutter member 52 is removed from the upper case 35, as shown in FIGS. 9 and 10, the fluid control device 60 is attached to the housing 2, and the fluid control 11 is installed in the housing 2. 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, as shown in FIGS. 9 and 10, the housing 2 is opened by sliding the work valve 36, and the housing 2. 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.

  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.

  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.

  The cutter member 52 in this embodiment is formed with a pair of openings 53b and 53b facing the tube axis direction of the fluid pipe 1 as a circulation portion in the cylindrical body 53. As a modification of this embodiment, FIG. As shown in FIGS. 11A and 11B, by punching the peripheral wall of the cylindrical body 53, a number of punches are formed at both ends (one not shown) of the fluid pipe 1 on the tube axis direction side. You may make it form the distribution | circulation part 56 comprised from the hole 53d. The flow part of the present invention may be configured by being drilled, for example, by machining using a cutting tool or the like, or may be a through hole provided in advance with a plate member used as a material for the peripheral wall of the cylindrical body. It may be configured.

  As shown in FIG. 11 (b), the range in which the flow part 56 is formed is formed over a wide range so as to cover the entire inner diameter side of the fluid pipe 1 when the cutting of the fluid pipe 1 by the cutter member 52 is completed. To do. Furthermore, in this case, the wall 53e of the cylindrical body 53 in which the punch hole 53d is not formed in the flow part 56 functions as a reinforcing member in the present invention, so that the vertical and horizontal directions are larger than the inner diameters of the pair of fluid pipes 1. In addition, the strength of the cylindrical body 53 can be improved as compared with the case where the long openings 53 b and 53 b are formed in the cylindrical body 53.

  In the present modification, the wall portion 53e in which the punch hole 53d in the flow portion 56 of the cylindrical body 53 is not formed as described above is configured as the reinforcing member. However, the tube axis of the fluid pipe 1 in the cylindrical body 53 is not limited. By forming a pair of openings as flow parts at both ends on the direction side and passing a beam or the like as a reinforcing member between both ends on the horizontal direction side or both ends on the vertical direction side of the opening, a cylindrical shape The strength of the body 53 may be improved.

  As described above, the cutter member 52 according to the present embodiment includes the blade 53a for cutting the fluid pipe 1 at the end on the fluid pipe 1 side and the openings 53b and 53b through which the fluid in the fluid pipe 1 flows. Since the fluid pipe 1 is cut while pressing the fluid pipe 1 with the blade 53a while securing the fluid flow path with the openings 53b and 53b, the cutter member 52 cuts the fluid pipe 1 with the blade 53a. Furthermore, since the openings 53b and 53b are positioned in the fluid pipe 1, a flow path for the fluid flowing in the fluid pipe 1 is secured, so that generation of turbulent flow due to the fluid in the fluid pipe 1 can be suppressed. The fluid pressure exerted on the cutter member 52 during cutting of the fluid pipe 1 is reduced, so that the fluid pipe 1 can be smoothly cut by the cutter member 52, and the turbulence of the fluid and the fluid exert on the cutter member 52. Fluid pressure Deformation of data member 52 is suppressed, it is possible to perform accurate cutting of the fluid pipe 1.

  Further, the openings 53b and 53b are formed to be longer than the inner diameter of the fluid pipe 1 from the vicinity of the blade 53a toward the direction of travel of the cutter member 52. Since the flow path of the fluid is constantly secured in the cutter member 52 until the completion of the cutting of 1, the pressure that the cutter member 52 receives from the fluid during the cutting of the fluid pipe 1 can be continuously reduced.

  In addition, by providing the flow member 56 with a reinforcing member that improves the strength of the cutter member 52, a portion where the weakly strong flow portion 56 is formed in the cutter member 52 is reinforced by the reinforcing member. The overall strength is improved, the deformation of the cutter member 52 due to the force with which the blade 53a presses the fluid pipe 1 is prevented, and the fluid pipe 1 can be cut more accurately.

  Further, since the stoppers 55 and 55 for holding the section 1b of the fluid pipe 1 generated by cutting the fluid pipe 1 are provided at positions that do not interfere with the blade 53a at the end on the fluid pipe 1 side, the cutter member The section 1b generated by cutting the fluid pipe 1 by the cutter member 52 can be recovered from the casing together with the cutter member 52 by effectively using the end of the fluid pipe 1 on the side of the fluid pipe 52.

  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 fluid pipe 1 is cut by the blade 53a by pressing the cutter member 52 against the fluid pipe 1, but the flow of the fluid flowing through the openings 53b and 53b is not limited. For example, the fluid pipe 1 may be cut while rotating the cutter member 52 in the circumferential direction.

  In the above embodiment, the fluid pipe 1 is cut by advancing the cutter member 52 including the cylindrical body 53 having a larger diameter than the fluid pipe 1 with respect to the fluid pipe 1. By moving the cutter member having a cylindrical body having a smaller diameter than the fluid pipe 1, the fluid pipe 1 is partially cut to perforate the fluid pipe 1, and the fluid pipe 1 is formed through the perforation. In this case, the housing may be configured by attaching only the first case 3 to the upper part of the fluid pipe 1.

  In addition, the fluid control 11 is composed of a 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. It may be configured by a valve, an emergency shutoff valve, a plug, or the like, and only the fluid flow path may be closed by closing only one of the upstream side and the downstream side of the fluid pipe 1.

  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.

DESCRIPTION OF SYMBOLS 1 Fluid pipe 1a Outer peripheral surface 1b Section 2 Case 50 Cutting device 52 Cutter member 53a Blade part 53b Opening part (circulation part)
53e Wall (Reinforcing member)
55 Stopper (holding means)
56 communication part

Claims (4)

A cutter member that cuts the fluid pipe in an uninterrupted state by advancing in the radial direction of the fluid pipe in a housing attached to the fluid pipe in a sealed manner,
A blade portion for cutting the fluid tube is provided at the end portion on the fluid tube side, and a circulation portion for circulating the fluid in the fluid tube is provided, and the fluid flow is caused to flow by the circulation portion by pressing the fluid tube with the blade portion. A cutter member characterized by cutting a fluid pipe while securing a path.   2. The cutter member according to claim 1, wherein the flow part is formed to be longer than the inner diameter of the fluid pipe from the vicinity of the blade part toward the traveling direction of the cutter member.   The cutter member according to claim 1, wherein a reinforcing member that improves the strength of the cutter member is provided in the flow part.   4. A holding means for holding a section of the fluid pipe generated by cutting the fluid pipe is provided at a position where the edge on the fluid pipe side does not interfere with the blade part. The cutter member according to claim 1.

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