JP5764476B2 - Work tool introduction method - Google Patents

Description

  In the present invention, the casing is attached to the fluid pipe in a sealing manner and a case body communicating with the opening of the casing is provided in a sealing manner, and a work tool for performing a predetermined operation in the casing is connected, A working tool for introducing the working tool into the casing in an uninterrupted state by inserting a shaft member capable of moving back and forth in the axial direction into the case body and moving the shaft member in the axial direction toward the casing. It relates to the introduction method.

  In the conventional work tool introduction method, a case body (housing) is attached to a fluid pipe, an attachment portion and a gate valve are sequentially attached to the case body, and a punching machine (advance / retreat restriction mechanism) is attached to the gate valve. ing. A hole saw (work tool) is sent out from the punching machine toward the fluid pipe, and the fluid pipe is punched (for example, see Patent Document 1).

Japanese Patent No. 4353560 (5th page, Fig. 4)

  However, in Patent Document 1, a member (shaft member) that feeds the hole saw from the perforator to the fluid pipe is required, and this member has at least a length from the inside of the perforator to the position for perforating the fluid pipe. Thus, there is a problem that the length extending outward from the fluid pipe becomes large.

  The present invention has been made paying attention to such a problem, and an object thereof is to provide a work tool introduction method capable of reducing the length of the shaft member extending outward from the case body.

In order to solve the above-mentioned problem, the work tool introduction method of the present invention includes:
A casing is attached to the fluid pipe in a sealing manner, and a case body communicating with the opening of the casing is provided in a sealing manner, and a work tool for performing a predetermined work in the casing is connected to advance and retract in the axial direction. A working tool introduction method for introducing the working tool into the casing in an uninterrupted state by inserting a possible shaft member into the case body and moving the shaft member in an axial direction toward the casing. And
A process procedure performed after a seal member is interposed in the insertion port of the shaft member in the case body and the case body and the shaft member are sealed,
A moving step of feeding the shaft member toward the inside of the housing and restricting the forward / backward movement of the shaft member by an advance / retreat restricting mechanism that moves the shaft member forward / backward or restricts forward / backward movement outside the case body;
A connecting step of detachably connecting a separate shaft member to the shaft member in which the forward / backward movement is restricted;
The above-mentioned process procedure is performed a predetermined number of times.
According to this feature, the sealing member is interposed between the case body and the shaft member, so that various processes in introducing the work tool can be performed while the case body and the inside of the housing are sealed. Since these various processes are performed outside the case body, there is no concern for affecting the case body and the case, and the work procedure can be introduced into the case by performing the process procedure a predetermined number of times. Can be achieved. Furthermore, since the shaft member is detachably connected, the shaft member can be pulled back from inside the housing. Therefore, the shaft member is sequentially connected before and during the work with the work tool, and the shaft member is sequentially connected after the work. By removing, the length of the shaft member extending outward from the case body can be shortened.

The work implement introducing method of the present invention is:
In the connecting step, the shaft member and the separate shaft member are connected by a connecting member formed substantially flush with the outer surfaces of the shaft members.
According to this feature, since the connecting member is formed substantially flush with the outer surfaces of the shaft members, the connecting member does not protrude outward from the shaft member. Therefore, even if the connecting member passes through the seal member, the sealing performance is not hindered. .

The work implement introducing method of the present invention is:
A plurality of the sealing members are provided in the insertion port so as to be separated from each other in the axial direction of the shaft member.
According to this feature, by providing a plurality of seal members separated in the axial direction, not only can the shaft member be prevented from tilting but also guided in the insertion direction, the sealing performance can be improved.

The work implement introducing method of the present invention is:
The advancing / retreating regulating mechanism includes a gripping member that can grip or release the shaft member, an advance / retreat member that moves the gripping member back and forth within the axial direction of the shaft member, and movement restriction or release of the shaft member. It is characterized by being comprised from the possible restriction member.
According to this feature, by holding the shaft member by the grip member, the advance / retreat movement of the advance / retreat member can be transmitted to the shaft member, and only the grip member can be returned by releasing the grip member from the shaft member. When the advance / retreat member moves forward / backward within the axial range of the shaft member, the length of the advance / retreat regulating mechanism extending outward from the case body can be suppressed within the range of the shaft member.

The work implement introducing method of the present invention is:
The gripping member is provided so as to sandwich the outer surface of the shaft member in the radial direction, and includes a pressing piece that can clamp or release the shaft member in the inner diameter direction.
According to this feature, since the displacement force acting in the inner diameter direction is canceled by the pinching piece pinching the shaft member in the inner diameter direction, the shaft member is securely held while maintaining the axial center position of the shaft member. It is possible to prevent the shaft center of the shaft member from being displaced and the sealing performance of the seal member from being lowered.

The work implement introducing method of the present invention is:
The restriction member is provided in the vicinity of the seal member.
According to this feature, since the restricting member is provided in the vicinity of the seal member, even if a force that tilts the shaft member due to the restriction of the restricting member is applied, the seal member is not sealed. Not only can it be minimized, but by arranging the gripping member and the advance / retreat member at a position outside the case body rather than the restricting member, a large range of movement in the axial direction can be taken.

The work implement introducing method of the present invention is:
The advance / retreat regulating mechanism includes a rotation drive unit that imparts rotation to the shaft member.
According to this feature, rotation can be transmitted to the shaft member by imparting rotation to the gripping member in a state where the shaft member is gripped by the rotation driving unit, and the cutter can be used as a work tool by rotating the shaft member. The field of work can be expanded by applying it.

The work implement introducing method of the present invention is:
When the rotation member imparts rotation to the shaft member, the shaft member is retracted by a predetermined length by the advance / retreat regulating mechanism after the connecting step, and the work tool and the fluid pipe are separated from each other. It is characterized by resuming rotation.
According to this feature, in the case of a cutter that drills a fluid pipe by rotating the work tool, the cutter blade drilling blade and the fluid pipe do not come into contact with each other because rotation is started by the rotation drive unit from a separated position. In addition, it can be introduced without applying a load to the drilling blade, the shaft member, and the rotation drive unit.

(A) is a side view which shows the introducing device of the working tool in Example 1, (b) is a top view similarly. It is a sectional side view which shows the state of the introduction initial stage of an introduction apparatus. (A) is AA sectional drawing of FIG. 2 which shows a holding member and a control member, (b) is a side view of (a) similarly. It is a sectional side view which shows before the delivery of the shaft member in a movement process. It is a sectional side view which shows after sending out of the shaft member in a movement process. It is a sectional side view which shows a movement control process and a connection process. It is a sectional side view which shows a regulation release process. FIG. 10 is a side cross-sectional view showing a part of a moving process in Example 2. FIG. 10 is a side cross-sectional view showing a work implement introducing device in Embodiment 3.

  EMBODIMENT OF THE INVENTION The form for implementing the working tool introduction method which concerns on this invention is demonstrated below based on an Example.

  The working tool introduction method according to the first embodiment will be described with reference to FIGS. 1 to 7. In a case 2 in which a fluid pipe 1 through which a fluid flows is hermetically enclosed, a work such as drilling or fluid control insertion at a predetermined position of the fluid pipe 1 is performed in an uninterrupted state by various kinds of working tools. There is. In the present embodiment, a method of introducing a cutter for cutting a predetermined portion of the fluid pipe 1 as a working tool in an uninterrupted state will be described.

  As shown in the lower part of FIG. 4, first, a two-divided housing 2 having an opening 2 a on the upper side is sealed at a predetermined position of the fluid pipe 1, and the opening 2 a of the housing 2 is sealed. In this case, an introduction device 5 for introducing a work tool into the housing 2 is installed through a work valve 4 capable of sealingly closing the opening 2a. In addition, the fluid in the fluid pipe may be, for example, gas or a gas-liquid mixture of gas and liquid in addition to water, industrial water, sewage, and the like. Furthermore, the housing has a two-divided structure in the present embodiment, but may have another multiple-divided structure, and the divided housings may be joined with bolts via welding or packing.

  The structure of the introduction device 5 will be described in detail with reference to FIGS. 1 and 2. The introduction device 5 includes a case body 3 that communicates with the housing 2, a cylindrical member 6 that communicates with the case body 3, and work in the present invention. A shaft member 8 to which a cutter 7 for cutting the fluid pipe 1 in the housing 2 is connected, and an advancing / retreating regulating mechanism 10 for restricting the advancing / retreating movement or the advancing / retreating movement of the shaft member 8. Yes.

  The case body 3 is attached in a sealed manner above the opening 2 a of the housing 2, and a flange 3 a is formed at the upper end of the case body 3. A cylindrical member 6 communicates with the flange 3a and is hermetically connected by bolts and nuts 27. The cylindrical member 6 includes a stopper member that can advance and retract from the outside of the cylindrical member 6 toward the inner diameter direction. 9,9 are provided. Further, an insertion port 6 a having a diameter smaller than that of the cylindrical member 6 is extended at the upper part of the cylindrical member 6. A mounting portion 6b projecting in the outer peripheral direction is provided on the peripheral surface of the insertion port 6a, and a support member 11 serving as a guide for the advance / retreat restriction mechanism 10 is fixedly installed on the mounting portion 6b.

  The support member 11 includes a substrate 11a whose one end is fixed to the mounting portion 6b, columns 11b and 11b which are vertically erected from the substrate 11a, and a beam plate 11c which is installed on the other end of the columns 11b and 11b. The four support shafts 11d are inserted through the substrate 11a and the beam plate 11c. Each column 11b, 11b is spaced apart from one side of the side surface of the substrate 11a, and one side end of each column 11b, 11b is fixed on the side surface. In addition, a beam plate 11c is fixed to the other side end of the columns 11b and 11b. The substrate 11a and the beam plate 11c are provided with a shaft member 8 at the center thereof, and support shafts 11d are provided so as to surround the shaft member 8. The support member 11 configured in this manner is set to be shorter than the axial length of the shaft member 8.

  As a result, the shaft member 8 is guided by the support member 11 to move forward and backward, so that the shaft member 8 can move forward and backward stably. That is, it is possible to prevent the shaft member 8 from being displaced or tilted in the forward / backward movement of the shaft member 8. Furthermore, since the support member 11 is set to be shorter than the length of the shaft member 8 in the axial direction, the length of the introduction device 5 extending outward of the housing 2 can be suppressed within the range of the shaft member 8. . In addition, not only the support member 11 of the present embodiment but also, for example, an integral cylindrical member having a space in which the shaft member can be inserted may be used, which is rigid and further has an axial length of the shaft member. What is necessary is just to be set shorter.

  In this embodiment, the annular seal member 20 is provided at two locations on the inner peripheral surface of the insertion port 6 a so as to be separated from each other in the extending direction of the insertion port 6 a, and the seal member 20 is the outer peripheral surface of the shaft member 8. The inside of the case body 3 and the cylindrical member 6 is sealed. By providing the seal members 20, 20 apart in the axial direction, not only can the shaft member 8 be prevented from tilting but also guided in the insertion direction, the sealing performance can be improved. The number of seal members is not limited to two, and a plurality of seal members may be provided at three or more locations, or only one location may be provided.

  The shaft member 8 will be described. A joint shaft 18 which is a separate shaft member to be described later can be attached to and detached from the shaft member 8, and the axial length can be extended or shortened. Further, the cutter 7 is connected to the front end of the shaft member 8 by a bolt / nut 21, and a recess 8 a that opens in the rear end direction is provided at the rear end of the shaft member 8. More specifically, the cutter 7 includes a cylindrical member provided with a perforating blade 7a at the peripheral end, and a center drill 7b that is disposed coaxially with the cylindrical member and protrudes further forward than the perforating blade 7a. Further, on the peripheral surface of the shaft member 8 on the cutter 7 side, an annular locking portion 8b protruding outward is formed.

  Next, the advance / retreat restriction mechanism 10 will be described. As shown in FIGS. 1 to 3, the advance / retreat restriction mechanism 10 mainly includes a gripping member 12 that can grip or release the shaft member 8, and a gripping member 12. The member 8 includes an advancing / retracting member 13 that moves forward and backward within a range in the axial direction of the member 8 and a restricting member 14 that can restrict or release the movement of the shaft member 8.

  More specifically, as shown in FIG. 1B, the advance / retreat member 13 has a substantially rectangular shape in plan view, and the support shaft 11d of the support member 11 fixedly installed on the attachment portion 6b is inserted vertically. Has been. Therefore, the advance / retreat member 13 is configured to move along the support shaft 11d. Further, as shown in FIG. 1A, advance / retreat cylinders 15, 15 as advance / retreat drive means are connected above the advance / retreat member 13, and a grip member 12 is located below the advance / retreat member 13. It is fixed by a spindle bolt 12g and a connecting bolt 12h. As a result, the advancing / retreating member 13 moves with the gripping member 12.

  Further, the regulating member 14 is fixed to the substrate 11a of the support member 11 so as to be immovable by a support bolt and a connecting bolt so as to be close to the insertion port 6a. That is, the regulating member 14 is provided in the vicinity of the seal members 20 and 20. Thus, even if a force for tilting the shaft member 8 is applied due to the restriction of the restriction member 14, not only can the influence on the sealing performance of the seal members 20, 20 be minimized, but also the case body rather than the restriction member 14. By arranging the gripping member 12 and the advancing / retreating member 13 at the outer portion 3, a large axial movement range can be taken.

  Next, the holding member 12 and the regulating member 14 will be described. In the present embodiment, the gripping member 12 and the regulating member 14 have the same structure, and only the gripping member 12 will be described regarding the structure of the gripping member 12 and the regulating member 14.

  As shown in FIG. 3A, the gripping member 12 is composed of four pinching pieces 12a, 12b, 12a ′, 12b ′ having an inner peripheral portion along the outer peripheral surface of the shaft member 8, The axial pressure of the shaft member 8 is narrowed from the outer diameter direction toward the inner diameter direction. Since the respective clamping pieces 12a, 12b, 12a ′, 12b ′ pinch the shaft member 8 in the inner diameter direction, the displacement forces acting in the inner diameter direction are canceled each other, so that the axial center position of the shaft member 8 is maintained. In addition, the shaft member 8 can be securely gripped. Thereby, it can prevent that the axial center of the shaft member 8 displaces and the sealing performance of the sealing members 20 and 20 falls.

  The end portion 12c in the circumferential direction of the narrow pressure piece 12a and the end portion 12d of the narrow pressure piece 12b have an uneven shape, and the uneven shape is alternately fitted. A bolt hole 12k is drilled in the same direction as the shaft member 8 at a fitting portion between the end 12c and the end 12d, and the support bolt 12g serving as a support shaft is inserted into the bolt hole 12k to be narrowed. The pressure piece 12a and the narrow pressure piece 12b are pivotally supported with respect to each other. That is, the narrow pressure pieces 12a and 12b are hinges 12j connected in a substantially hinge shape that can be rotated around a support bolt 12g inserted into the bolt hole 12k. The narrow pressure pieces 12a 'and 12b' are also hinges 12j 'by the same configuration.

  Pin holes 16, 16 are bored in the same direction as the shaft member 8 at both ends of the hinge 12 j around the support bolt 12 g. Similarly, the hinge 12j 'is also provided with pin holes 16' and 16 'at both ends around the spindle bolt 12g'. A pivot pin 17 and a pivot pin 17 'are rotatably arranged in the pin hole 16 and the pin hole 16'.

  Between the hinge 12j and the hinge 12j ', grip cylinders 23 and 23' are installed at two locations. The gripping cylinder 23 has a piston 23a that expands and contracts toward the pivot pins 17 and 17 'on the upper side of FIG. 3 (a). The gripping cylinder 23' is lower in the drawing of FIG. 3 (a). It has a piston 23a 'that expands and contracts toward the side pivot pins 17, 17'. The pistons 23a and 23a 'are connected to the respective pivot pins 17 and 17' located in the extending and contracting direction.

  Thus, the pressing pieces 12a, 12b, 12a ′, 12b ′ are in a state of being connected in an approximately annular shape so as to surround the shaft member 8 in the circumferential direction, and an annular space in the center in plan view. Is formed. This annular space is slightly larger in diameter than the outer periphery of the shaft member 8 in a natural state, and the inner periphery of each of the pressing pieces 12a, 12b, 12a ′, 12b ′ located in the annular space has elasticity. The elastic member 22 is provided. That is, the elastic member 22 is provided in the gap between the gripping member 12 and the shaft member 8, and the gripping member 12 and the shaft member 8 are not in direct contact with each other, so that the shaft member 8 is damaged. There is no.

  Further, the connecting bolt 12h described above is formed in each of the pinching pieces 12a, 12b, 12a ′, 12b ′, and is inserted into a long hole 24 having a length in the substantially radial direction of the shaft member 8 and fixed to the advance / retreat member 13. ing. Accordingly, the pinching pieces 12a, 12b, 12a ', 12b' are arranged to be allowed to move in the substantially radial direction of the shaft member 8 by the length of the long hole 24 with respect to the shaft member 8, respectively. Such pivot pins 17 and 17 'and the connecting bolt 12h are provided with a retaining member 25 for locking against the detachment movement of the pivot pins 17 and 17' and the connecting bolt 12h. , 12a ′ and 12b ′.

  An operation in which the grip member 12 grips or releases the grip on the shaft member 8 will be described. Pistons 23a and 23a 'are driven by connecting hydraulic hoses (not shown) to the gripping cylinders 23 and 23'. The gripping operation of the gripping member 12 is such that when the pistons 23a and 23a ′ are contracted, the hinges 12j and the hinges 12j ′ rotate so as to close toward the shaft member 8, and the pinching pieces 12a, 12b, and 12a. ', 12b' makes the shaft member 8 gripped by narrowing the shaft member 8 in the radial direction. Further, the grip releasing operation of the grip member 12 is brought into a grip release state by rotating the hinges 12j and 12j 'apart from the shaft member 8 by extending the pistons 23a and 23a'. Is. The operations of these pistons 23a and 23a 'are interlocked.

  The forward / backward regulating mechanism 10 configured as described above further includes a rotation motor 19 that is a rotation driving unit of the present invention that imparts rotation to the gripping member 12 that is gripping the shaft member 8. Specifically, a rotation motor 19 is fixed to a part of the advancing / retreating member 13, and rotation is applied to the gripping member 12 in a state in which the shaft member 8 is gripped by the rotation motor 19. The cutter 7 can be applied as a work tool by transmitting the rotation and rotating the shaft member 8.

  Next, a method for cutting the fluid pipe 1 in an uninterrupted state by the introduction device 5 configured as described above will be described.

  As shown in FIG. 2, in the initial state in which the introduction device 5 is installed in the opening 2 a of the housing 2, the stopper members 9 and 9 of the cylindrical member 6 are moving toward the shaft member 8, and the stopper A state in which the locking portion 8b of the shaft member 8 is placed on the members 9, 9 is locked. In this state, the shaft member 8 is prevented from falling into the housing 2 due to its own weight or the weight of the cutter 7, and the cutter 7 is accommodated in the case body 3. The stopper member and the locking portion are not limited to those provided on the cylindrical member, and may be provided outward from the insertion port. It may be gripped.

  First, the movement process of the present invention in which the shaft member 8 is sent out into the housing 2 by the advance / retreat restriction mechanism 10 to restrict the advance / retreat movement of the shaft member 8 will be described.

  As shown in FIG. 4, in the initial state of the introduction device 5, a hydraulic hose (not shown) is connected to the gripping member 12, and the gripping member 12 is held in the shaft member 8 by the gripping operation to the shaft member 8 described above. Grip to the outer peripheral surface on the rear end side. In this way, the hydraulic hose is removed from the gripping member 12 while maintaining the gripping state of the gripping member 12 on the shaft member 8. Further, the stopper members 9, 9 are retracted toward the outside of the cylindrical member 6, and the movement restriction of the shaft member 8 is released. As a result, the shaft member 8 and the cutter 7 are brought into a state where the movement of the shaft member 8 and the cutter 7 is restricted by the gripping member 12 while the movement restriction of the stopper members 9 and 9 is released.

  Next, as shown in FIG. 5, the rotary motor 19 is activated. The gripping member 12 is rotated by the rotary motor 19 while the gripping state of the shaft member 8 is held by the gripping member 12, whereby the shaft member 8 and the cutter 7 are rotated. Further, the advancing / retreating member 13 and the gripping member 12 are advanced by the advancing / retreating cylinders 15 and 15 in a state where the shaft member 8 and the cutter 7 are rotated, so that the housing 2 is kept in a state where the shaft member 8 and the cutter 7 are rotated. The center drill 7b of the cutter 7 first pierces the tube wall of the fluid tube 1. The moving movement of the shaft member 8 and the cutter 7 is performed in a range from the gripping position of the gripping member 12 to the position close to the regulating member 14, and the shaft member 8 slides on the seal members 20 and 20. Is moved forward. The state where the movement of the shaft member 8 and the cutter 7 after completion of the advancing movement is restricted by the gripping member 12 is continued.

  Next, after the shaft member 8 and the cutter 7 are moved forward, the rotation of the shaft member 8 by the rotary motor 19 is stopped. And the process which connects the joint shaft 18 mentioned above to the shaft member 8 which is a connection process of this invention is performed.

  When this connection process is described, as shown in FIG. 6, the joint shaft 18 has the same diameter as that of the shaft member 8 excluding the locking portion 8 b and has the same axial length as that of the shaft member 8. In addition, a convex portion 18a that can be fitted into the concave portion 8a of the shaft member 8 is provided at the front end, and a concave portion 8a ′ similar to the concave portion 8a of the shaft member 8 is provided at the rear end. Further, a through-hole 18b penetrating in the radial direction is formed in the convex portion 18a of the joint shaft 18, and holes 8c and 8c corresponding to the through-hole 18b are formed in the concave portion 8a of the shaft member 8. Has been.

  First, the convex portion 18a of the joint shaft 18 is fitted into the concave portion 8a of the shaft member 8, and alignment is performed so that the through hole 18b and the hole portions 8c and 8c communicate with each other. Thereafter, a connecting member 26 for connecting the shaft member 8 and the joint shaft 18 is inserted into the through hole 18b and the holes 8c, 8c, and the connecting member 26 is connected to the shaft member 8 and the joint shaft 18 by pinning 26a, 26a. Fix across. The connecting member 26 and the pin stoppers 26 a and 26 a are substantially flush with each other without protruding outward from the outer peripheral surface of the shaft member 8. That is, in the connecting step, the shaft member 8 and the joint shaft 18 are connected to each other by the connecting member 26 and the pinning 26a, 26a formed substantially flush with the outer surfaces of the shaft member 8 and the joint shaft 18. Since the connecting member 26 does not protrude outward from the shaft member 8, even if the connecting member 26 passes through the seal members 20 and 20, the sealing performance is not hindered. In the same manner as described above, a plurality of joint shafts are sequentially connected by fitting a convex portion of another joint shaft having the same structure as the joint shaft 18 into the recess 8a ′ at the rear end of the joint shaft 18. Can be done.

  After this connection process is completed, a movement restriction process is performed. The movement restricting step is a step of holding the shaft member 8 at a narrow pressure by the restricting member 14, and the shaft member 8 and the joint shaft 18 are made unmovable by performing this movement restricting step. Then, the grip member 12 is released from the shaft member 8 by performing the above-described grip release operation of the grip member 12 while the shaft member 8 is held narrowly by the regulating member 14.

  Next, as shown in FIG. 7, when the shaft member 8 and the joint shaft 18 are incapable of moving, the advance / retreat member 13 and the gripping member 12 are moved backward to above the support member 11 by the advance / retreat cylinders 15, 15. In this state, the holding member 12 is released from the holding state of the shaft member 8, so that the shaft member 8 and the joint shaft 18 held narrowly by the restricting member 14 maintain the positions after the moving process, and the advancing / retreating member. Only 13 and the gripping member 12 can be moved backward above the support member 11.

  After only the advancing / retracting member 13 and the gripping member 12 are moved backward to above the support member 11, the gripping member 12 is again gripped on the outer peripheral surface on the rear end side of the shaft member 8 by the above-described operation. At this time, since the movement of the shaft member 8 and the joint shaft 18 is restricted by the restriction member 14, the restriction member 14, which is a restriction release process, is released from the shaft member 8. Thus, the shaft member 8 and the joint shaft 18 can be moved forward and backward again by the advance / retreat member 13 and the gripping member 12.

  After the regulation release step, although not particularly illustrated, the fluid pipe 1 is cut by the cutter 7 by performing the moving step described above again. These steps are performed outside the case body 3, and thus there is no concern of affecting the inside of the case body 3 and the housing 2. Furthermore, after the cutting is completed, the shaft member 8 can be retracted from the housing 2 by moving the shaft member 8 backward in the moving step and sequentially removing in the connecting step. That is, since the shaft member 8 is detachably connected to the joint shaft 18, the length of the shaft member 8 extending outward from the case body can be shortened. In addition, the axial direction toward the housing | casing 2 of the shaft member 8 and the predetermined number of joint shafts 18 is performed by performing the process steps of the movement process, the connection process, the movement restriction process, and the restriction release process described above a plurality of times. Can be extended in sequence.

  Further, when the shaft member 8 is pulled back until it returns to the initial state, the casing 2 is sealed by the work valve 4 and the introduction of the introduction device 5 completes the disconnection of the fluid pipe 1 in the unsteady flow state.

  As described above, in the method for cutting a predetermined portion of the fluid pipe 1 in the uninterrupted state in the first embodiment, the seal members 20 and 20 are interposed in the insertion port 6a of the shaft member 8 communicated from the case body 3. The process procedure performed after sealing the case body 3 and the shaft member 8 is moved into the housing 2 by the advance / retreat regulating mechanism 10 that moves the shaft member 8 forward / backward or restricts the forward / backward movement outside the case body 3. A moving step for feeding the shaft member 8 toward the shaft and restricting the forward / backward movement of the shaft member 8, and a connecting step for detachably connecting the joint shaft 18 which is a separate shaft member to the shaft member 8 where the forward / backward movement is restricted; , A movement restricting step for making the shaft member 8 immovable by the restricting member 14 for restricting the forward / backward movement of the shaft member 8 and a restriction for releasing the restricting member 14 to move the shaft member 8 from the immovable state to the movable state. Release process and configuration It is, has these step procedure to perform a predetermined number of times. The sealing members 20 and 20 are interposed between the insertion port 6a and the shaft member 8, so that various steps in introducing the cutter 7 are performed while the insertion port 6a and the inside of the housing 2 are sealed. Since these various processes are performed outside the case body 3, there is no possibility of affecting the case body 3 and the housing 2, and the drilling of the cutter 7 is performed by performing the process procedure a predetermined number of times. Cutting the fluid pipe 1 with the blade 7a can be achieved. Further, the joint shaft 18 is detachably connected to the shaft member 8 so that the joint shaft 18 and the shaft member 8 can be pulled back from within the housing 2. The length of the shaft member extending outward from the case body 3 can be shortened by sequentially connecting 18 and removing the joint shaft 18 after the operation.

  Further, the advance / retreat regulating mechanism 10 mainly includes a grip member 12 that can grip or release the shaft member 8, an advance / retreat member 13 that moves the grip member 12 back and forth within the axial direction of the shaft member 8, and the shaft member 8. And a regulating member 14 that can regulate or release the regulation. By grasping the shaft member 8 by the gripping member 12, the shaft member 8 can be moved forward and backward together with the advance / retreat member 13, and the gripping member 12 can be moved. Can be released from the shaft member 8 and only the gripping member 12 can be returned, so that the advance / retreat member 13 moves forward and backward within the axial range of the shaft member 8, so that the case body 3 of the advance / retreat regulating mechanism 10 is moved outward. The length extending to the shaft member 8 can be suppressed within the range of the shaft member 8.

  Next, a working tool introduction method according to the second embodiment will be described with reference to FIG. In addition, the same structure as the said Example and the overlapping structure are abbreviate | omitted. In the present embodiment, a method for cutting a predetermined portion of the fluid pipe 1 in a continuous flow state will be described.

  FIG. 8 shows a state in which the moving process, the connecting process, and the movement restricting process are performed from the initial state of the introduction device 5 as in the above-described embodiment. It shows the way of cutting. That is, the punching blade 7a of the cutter 7 is in contact with the drilling surface of the fluid pipe 1 in the middle of cutting. Further, in this state, the rear end side of the shaft member 8 advances and moves toward the fluid pipe 1 from the position in the initial state to the position of the regulating member 14 (movement process), and the joint shaft 18 faces the shaft member 8. Are connected together (connection step).

  Further, the shaft member 8 is held at a narrow pressure by the restricting member 14 (movement restricting step), the shaft member 8 and the joint shaft 18 are made immovable, and the shaft member 8 is held at a narrow pressure by the restricting member 14. The gripping member 12 is released from the shaft member 8 by releasing the gripping operation of the gripping member 12 while the gripping member 12 is held. When the shaft member 8 and the joint shaft 18 are immovable, the advance / retreat member 13 and the gripping member 12 are moved to the middle of the upper portion of the support member 11 by the advance / retreat cylinders 15, 15. It has been moved backward by α minutes. The advance / retreat member 13 and the gripping member 12 are moved backward to the position of the joint shaft 18.

  After only the advancing / retracting member 13 and the gripping member 12 are moved backward to above the support member 11, the gripping member 12 is gripped on the outer peripheral surface of the joint shaft 18 by the gripping operation of the gripping member 12. Then, the grasping release operation of the restriction member 14 is performed in a state where the shaft member 8 and the joint shaft 18 are grasped by the grasping member 12 (regulation release step).

  Next, the moving step of feeding the shaft member 8 toward the inside of the housing 2 in the above state is performed again. When rotation is applied to the gripping member 12 in the gripping state of the joint shaft 18 by the rotary motor 19 in the movement process, the shaft member is first moved by the advance / retreat member 13 and the gripping member 12 after the connection process, the movement restriction process, and the restriction release process. A separation step of temporarily retracting 8 by a predetermined length α is performed. This separation step is a step of temporarily separating the perforating blade 7 a of the cutter 7 from the fluid pipe 1. Then, after the separation step, the rotation is resumed at a position where the perforating blade 7a of the cutter 7 and the fluid pipe 1 are separated.

  According to this, since the rotation motor 19 starts the rotation from the position where the perforation blade 7a of the cutter 7 and the fluid pipe 1 are separated, the perforation blade 7a of the cutter 7 and the fluid pipe 1 do not come into contact with each other. No load is applied to the motor 19 at the beginning of rotation.

  Then, the movement process which sends out the shaft member 8 is performed. That is, it is a process procedure for performing the separation process after the movement process, the coupling process, the movement regulation process, and the regulation release process, and the shaft member 8 is advanced again toward the fluid pipe 1 by the advance / retreat member 13 and the gripping member 12, The tube 1 is drilled. By performing this process procedure a predetermined number of times, the axial length of the shaft member 8 toward the inside of the housing 2 can be sequentially extended, and a load is not applied to the rotary motor 19 at the beginning of rotation. Cutting the fluid pipe 1 is achieved.

  Next, the working tool introduction method according to the third embodiment will be described with reference to FIG. It should be noted that the same components as those shown in the above-described embodiment are denoted by the same reference numerals and redundant description is omitted. In the present embodiment, a method for inserting a work tool into a predetermined location of the fluid pipe 1 in an uninterrupted state will be described.

  As shown in FIG. 9, the working tool of the present invention in the present embodiment is installed at the cut portion of the fluid pipe 31 cut in the housing 2 as described in the first embodiment, and the fluid pipe 31. It is the switching valve 37 which switches the flow path. The switching valve 37 includes a valve box 37a that is housed in a sealed manner, a valve body 37b that rotates in the valve box 37a to switch a flow path, and a valve shaft 37c that serves as an axis around which the valve body 37b rotates. , Is composed of.

  The switching valve 37 configured in this way is connected so that the shaft member 8 and the valve shaft 37c are coaxially positioned with respect to the tip of the shaft member 8. An attachment 38 is attached to the tip of the shaft member 8 with bolts and nuts 21, and a suspension member 40 is connected to the attachment 38 via an adjustment member 39 that adjusts the shaft length. Here, the switching valve 37 is suspended by a connecting member (not shown). The attachment 38 and the adjustment member 39 are connected by a bolt / nut 41, and the adjustment member 39 and the suspension member 40 are connected by a bolt / nut 42.

  In this state, a moving process of sending the shaft member 8 toward the inside of the housing 2 by the advance / retreat regulating mechanism 10 is performed. In the moving process in this embodiment, first, a hydraulic hose (not shown) is connected to the gripping member 12, and the gripping member 12 is gripped to the outer peripheral surface of the rear end side of the shaft member 8 by the gripping operation to the shaft member 8 described above. The hydraulic hose is removed from the gripping member 12 while maintaining the gripping state of the gripping member 12 on the shaft member 8, and the stopper members 9, 9 are retracted toward the outside of the tubular member 6, so that the shaft member 8 In this state, the advance / retreat member 13 and the gripping member 12 are advanced by the advance / retreat cylinders 15 in a state where the movement restriction is released.

  The switching valve 37 is moved toward the inside of the housing 2 coaxially with the shaft member 8, so that the switching valve 37 can be accurately inserted into the cut portion of the fluid pipe 31 in the housing 2. After this moving step, the length of the axial direction of the shaft member 8 toward the inside of the housing 2 is sequentially performed by performing the steps of the connecting step, the movement restricting step, and the deregulating step a predetermined number of times in the same manner as in the above embodiment. In addition to being able to be extended, the valve box 37a is sealed in the housing 2 and the switching valve 37 is inserted into a predetermined location of the fluid pipe 1.

  After the valve box 37a is sealed in the casing 2, the switching valve 37 is fixed in the casing 2 by fixing bolts 44 and 44 for fixing the valve box 37a in the vicinity of the opening 2a of the casing 2. To do. Specifically, the upper end periphery of the valve box 37a is a tapered surface 37d in which the corners of the upper end periphery of the valve box 37a are chamfered, and the fixing bolts 44 and 44 have their tips mutually locked with the tapered surface 37d. It has a tapered shape and advances and retreats from the outside of the housing 2 toward the inside. By moving the fixing bolts 44 and 44 toward the inside of the housing 2, the fixing bolts 44 and 44 and the tapered surface 37 d are locked, and the switching valve 37 is fixed in the housing 2. Thereafter, the work valve 4 and the introduction device of the present embodiment are removed from the housing 2, whereby the insertion work of the switching valve 37 is completed at the cut location of the fluid pipe 31.

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

  For example, in the said Example, although the process procedure which consists of a movement process, a connection process, a movement control process, and a regulation release process is performed a predetermined number of times, not only this but the function to move a shaft member forward / backward and the forward / backward movement are controlled. The movement procedure may be performed by an advance / retreat restricting mechanism having a function, and then the process procedure for performing the connection process may be performed a predetermined number of times.

  The shaft member and the joint member may be formed of the same standard, for example, as long as the shaft member and the joint shaft are connected flush with each other. In addition, the holding member and the regulating member are not limited to those holding the narrow pressure, and for example, the shaft member may be held with the holding member or the regulating member by inserting a pin into a predetermined hole.

  In the above embodiment, the gripping member and the restricting member have the same structure, and the gripping member can be moved forward and backward, and the restricting member cannot be moved forward and backward. The structure may be different from the member, and the restricting member may be capable of moving forward and backward. Alternatively, the gripping member and the regulating member may be unable to move forward and backward, and can be applied to various modes.

DESCRIPTION OF SYMBOLS 1 Fluid pipe 2 Case 2a Opening part 3 Case body 4 Work valve 5 Introducing device 6 Cylindrical member 6a Insertion port 7 Cutter (work tool)
8 shaft member 10 advance / retreat restriction mechanism 11 support member 12 gripping members 12a, 12b pinching piece 13 advance / retreat member 14 restriction member 15 advance / retreat cylinder 18 shaft 19 rotation motor (rotation drive unit)
20 Seal member 26 Connecting member 31 Fluid pipe 37 Switching valve (working tool)
44 Fixing bolt

Claims (8)

A casing is attached to the fluid pipe in a sealing manner, and a case body communicating with the opening of the casing is provided in a sealing manner, and a work tool for performing a predetermined work in the casing is connected to advance and retract in the axial direction. A working tool introduction method for introducing the working tool into the casing in an uninterrupted state by inserting a possible shaft member into the case body and moving the shaft member in an axial direction toward the casing. And
A process procedure performed after a seal member is interposed in the insertion port of the shaft member in the case body and the case body and the shaft member are sealed,
A moving step of feeding the shaft member toward the inside of the housing and restricting the forward / backward movement of the shaft member by an advance / retreat restricting mechanism that moves the shaft member forward / backward or restricts forward / backward movement outside the case body;
A connecting step of detachably connecting a separate shaft member to the shaft member in which the forward / backward movement is restricted;
A work implement introducing method characterized in that the process procedure is performed a predetermined number of times.   2. The operation according to claim 1, wherein in the connecting step, the shaft member and the separate shaft member are connected by a connecting member formed substantially flush with an outer surface of the shaft members. Ingredient introduction method.   The work tool introduction method according to claim 1, wherein a plurality of the seal members are provided in the insertion port so as to be separated from each other in the axial direction of the shaft member.   The advancing / retreating regulating mechanism includes a gripping member that can grip or release the shaft member, an advance / retreat member that moves the gripping member back and forth within the axial direction of the shaft member, and movement restriction or release of the shaft member. The working tool introduction method according to claim 1, wherein the work tool introduction method is configured by a possible regulating member.   The said holding member is provided so that the outer surface of the said shaft member may be pinched | interposed to radial direction, and it consists of a pinching piece which can pinch | pinch or release pinching of this shaft member to an internal diameter direction. Work tool introduction method.   6. The work tool introduction method according to claim 4, wherein the restriction member is provided in a vicinity of the seal member.   The work implement introducing method according to claim 1, wherein the advance / retreat regulating mechanism includes a rotation drive unit that imparts rotation to the shaft member.   When the rotation member imparts rotation to the shaft member, the shaft member is retracted by a predetermined length by the advance / retreat regulating mechanism after the connecting step, and the work tool and the fluid pipe are separated from each other. The work implement introducing method according to claim 7, wherein the rotation is resumed.

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