JP7040753B2 - Installation method of diameter expansion device and elastic sleeve - Google Patents

Description

The present invention relates to a diameter-expanding device used when installing an elastic sleeve in an existing pipeline, and a method for installing an elastic sleeve using this diameter-expanding device.

The existing sewerage pipeline may be damaged due to the influence of land subsidence, earthquakes, etc., or due to cracks in the pipes constituting the pipeline or misalignment of the pipe seams due to long-term use. As described above, in a pipeline in which the pipe is damaged, groundwater or earth and sand may infiltrate from the damaged portion and impair the original flow-down function.

In the technique described in Patent Document 1, when repairing a damaged portion of a pipeline, a plate-shaped member is curved and a diameter-expanding member is attached to an opposite end edge to form a cylindrical shape, and the outer periphery thereof is elastic. A repair member formed by attaching a tubular body having the above is used. That is, the cylindrical repair member is transferred to a position facing the target repair site, and the diameter-expanding member is operated at this position to expand the diameter of the curved plate-shaped member to obtain an elastic tubular body. It is pressed against the inner wall surface of the pipeline so that it can be partially repaired. Therefore, it is advantageous to apply when it becomes necessary to partially repair the pipeline.

On the other hand, recently, in order to improve the seismic resistance of existing pipelines, a groove is cut from the inner peripheral surface side near the manhole to form the groove as a guide joint, and the guide joint is used as a starting point to break the groove in the event of an earthquake. (See Patent Document 2). In the existing pipeline in which the guide joint is formed in this way, in the event of an earthquake, the existing pipeline breaks from the guide joint as a starting point and absorbs the seismic force, so that it is possible to prevent the entire pipeline from breaking due to the seismic force.

When a pipeline breaks from a guide joint formed in the pipeline at the time of an earthquake, groundwater and earth and sand will infiltrate from this ruptured site. Therefore, it is necessary to arrange the elastic tubular body described in Patent Document 1 in the portion where the guide joint is formed.

Japanese Unexamined Patent Publication No. 2005-214246 (Patent No. 4544873) Japanese Unexamined Patent Publication No. 2006-144229 (Patent No. 4695381)

Repairing partially damaged parts of existing pipelines to prevent intrusion of groundwater and earth and sand, and preventing infiltration of groundwater and earth and sand that occur when the guide joints formed to improve earthquake resistance are damaged during an earthquake. Alternatively, it is advantageous to use the technique described in Patent Document 1 in order to prevent the infiltration of groundwater and earth and sand from the joint of the straight wall pipe in the assembly manhole. In this technique, it is necessary to manually transfer a plate-shaped member curved in a cylindrical shape or an elastic tubular body attached to the outer peripheral portion of the member to a target repair site.

However, there is a limitation that the diameter of the pipeline that a person can enter is 600 mm, and there is a problem that it cannot be applied to a small diameter pipeline smaller than this limited diameter.

The guide joint described in Patent Document 2 is formed in the vicinity of a manhole in an existing pipeline. Therefore, even in a small-diameter pipeline that cannot be entered by a person, it is possible to somehow apply the technique described in Patent Document 1 from the manhole side to arrange an elastic tubular body at the guide joint. ..

However, in the case of an existing pipeline with a structure in which the pipe connected to the manhole and the manhole are integrated by the concrete placed on the outer peripheral portion, the guide joint will be formed at a position where the placed concrete can be avoided. .. Therefore, even if the technique described in Patent Document 1 is applied to the inner peripheral surface side of the portion where the guide joint is formed, there is a problem that the elastic tubular body cannot be arranged by the work from the manhole side. be.

An object of the present invention is a diameter-expanding device capable of installing an elastic sleeve having elasticity by expanding the diameter of a support member even in a small-diameter pipeline by pressing it against the inner wall surface of the pipeline. It is an object of the present invention to provide a method of installing an elastic sleeve using a diameter expanding device.

In order to solve the above problems, a typical diameter-expanding device according to the present invention is formed in a spiral shape and at both ends in the circumferential direction and both ends in the width direction are inclined, and the inclined ends are formed. A device for expanding the diameter of a support member having a holding piece holding the end portion and a wedge-shaped member having a notch corresponding to the inclination of the end portion attached to one side piece of the holding piece . Is movable, and is arranged on a carriage having a holding portion for holding the support member on the outer peripheral portion and on the inner peripheral side of the support member held on the holding portion on the outer periphery of the holding portion of the carriage. The primary diameter-expanding member for engaging the widthwise end on the other side of the support member in the circumferential direction with the notch of the wedge-shaped member attached to the end of the support member by primary diameter-expanding, and the dolly. On one side of the circumferentially opposed end of the spiral support member held in the holding portion and on both sides in the width direction . It has a pair of locking members for locking each of the arranged pair of wedge-shaped members, and a driving member arranged on the carriage and driving the pair of locking members to approach or separate from each other. It is a thing.

In the diameter expanding device, the pair of locking members has a locking piece having a recess formed in the facing surface to fit and lock the end portion of the wedge-shaped member. The end portion of the locking piece protrudes from the end portion of the holding portion toward the center side, and the guide member guides the movement of the pair of locking members in the direction of approaching or separating from each other on the carriage. Is arranged in the longitudinal direction of the carriage, and it is preferable that a vertical guide is arranged to guide the pair of locking members to move in the vertical direction of the carriage .

Further, the method for installing the elastic sleeve according to the present invention is a method for installing the elastic sleeve using any of the above-mentioned diameter-expanding devices, and pressure is previously applied to the outer periphery of the holding portion of the trolley constituting the diameter-expanding device. A holding piece that is formed in a spiral shape on the outer periphery of the expanding member and that holds the ends on one side in the circumferential direction and at both ends in the width direction, and one side of the holding piece. A support member having a pair of wedge-shaped members having a notch corresponding to the inclination of the end portion is arranged on one piece, and an elastic sleeve having elasticity is arranged on the outer periphery of the support member and arranged in the holding portion. The recesses formed in the pair of locking members constituting the diameter-expanding device are fitted and locked to the pair of wedge-shaped members arranged at both ends in the width direction on one side in the circumferential direction of the support member. After that, the trolley is moved to a position in the pipeline where the elastic sleeve should be installed, and at the moving position, a pressure fluid is supplied to the expansion member via the supply pipe to expand the swirl. After the support member formed in a shape is primarily expanded in diameter and both ends in the width direction are engaged with the notch portion of the pair of wedge-shaped members on the other side in the circumferential direction of the support member, the primary diameter expansion is completed. By bringing the pair of locking members closer to each other by the driving member arranged on the carriage, the support member is further expanded in diameter by the wedge-shaped member attached to the support member, and the support member has a diameter of the support member. It is characterized in that an elastic sleeve arranged on the outer periphery is pressed into contact with a position to be installed in a pipeline.

In the diameter expanding device according to the present invention, the diameter of the support member can be expanded regardless of the diameter of the existing pipeline (hereinafter, simply referred to as “pipeline”). That is, since the carriage is configured to be movable in the pipeline, the spiral support member is held on the outer periphery of the holding portion constituting the carriage, and a pair of wedges are held between the opposite ends of the support members. The shaped member can be locked by the locking member and moved to a desired position.

Then, after reaching the target position, the locking members are brought close to each other by the driving member, so that the pair of wedge-shaped members approach each other, and the diameter of the support member can be expanded accordingly. Therefore, by arranging the elastic sleeve on the outer periphery of the support member, the elastic sleeve can be pressed against the inner peripheral surface side of the pipeline as the diameter of the support member increases.

Therefore, the wedge-shaped members can be brought close to each other to expand the diameter of the support member without the worker directly operating the locking member. For this reason, by setting the dimensions of the bogie and holding part to correspond to the diameter of the pipeline, when it is necessary to install an elastic sleeve even for a pipeline with a small diameter that people cannot enter. It can be used.

Further, in the method for installing the elastic sleeve according to the present invention, the diameter-expanding device configured as described above is used, and after the diameter-expanding device is moved to the position where the elastic sleeve should be installed in the pipeline, the elastic sleeve is installed. By bringing the locking members closer to each other by the driving member, the support member can be expanded in diameter and the elastic sleeve can be installed by pressing it into a desired position where it should be installed.

Further, after moving the diameter-expanding device configured as described above to a position where the elastic sleeve in the pipeline should be installed, the expansion member can be expanded to temporarily expand the diameter of the support member. Next, by bringing the locking members close to each other by the drive member, the diameter of the support member can be expanded and the elastic sleeve can be pressed into contact with the target installation position for installation.

In particular, since the support member is formed in a spiral shape, the initial diameter can be reduced, and it is possible to correspond to a pipeline having a smaller diameter. In addition, reducing the initial diameter can be used even when there is an obstacle in the pipeline.

It is a front view explaining the structure of the diameter expansion apparatus which concerns on this Example. It is a side view and a sectional view of both sides of FIG. It is a plan view of FIG. It is sectional drawing explaining the structure of the diameter expansion device. It is a figure which schematically explains the structure of the moving body which moves a locking member, and the connecting body. It is a figure explaining the initial state which arranged the wedge-shaped member which concerns on a comparative example on a support member. It is a figure explaining the state which the diameter of the support member was expanded by the wedge-shaped member which concerns on a comparative example . It is a figure explaining the support member and the wedge-shaped member which concerns on this Example . It is a figure explaining the structure which installed the elastic sleeve at the target position of a pipeline. It is a figure explaining the procedure of the installation method which concerns on this Example.

The diameter-expanding device according to the present invention is for expanding the diameter of a curved member when an elastic sleeve is installed at a desired position inside a pipeline, for example, as in the technique described in Patent Document 1. It is configured to be used in an advantageous manner. In particular, it is advantageous when applied to a pipeline having a small diameter so that a person cannot enter the inside and perform work. That is, a wedge-shaped member is attached to the opposite end edge of the spiral support member, and an elastic sleeve having elasticity is attached to the outer periphery, and the wedge-shaped member is operated at a target installation position to expand the diameter of the support member. The elastic sleeve is configured so that it can be pressed against the inner wall surface of the conduit.

The diameter-expanding device according to the present invention can transfer the support member held by the holding portion to a target installation position by using a trolley. Therefore, by setting dimensions such as the size of the carriage and the diameter of the holding portion that holds the support member in accordance with the diameter of the target pipeline, it is possible to apply regardless of the diameter. Then, by installing the elastic sleeve arranged on the outer periphery of the support member at the target position, it is possible to prevent the infiltration of groundwater and earth and sand from the damaged part of the pipeline, or to prevent the infiltration of groundwater and earth and sand that may occur when the pipe is damaged in the future. It is possible to prevent intrusion.

The pair of locking members constituting the diameter-expanding device are driven by the driving member and bring the wedge-shaped members close to each other to expand the diameter of the support member. When the pair of wedge-shaped members move in a direction approaching each other, it is not preferable to interfere with the holding portion that holds the support member. Therefore, it is preferable that the locking member is formed so that the facing ends project toward the center side of the holding portion.

The driving member drives the pair of locking members so as to approach or separate from each other. Therefore, the drive member may be any as long as it has this function, and does not limit the drive method. Examples of the drive method of the locking member by such a drive member include a drive method using a rack and a pinion, a drive method using a rotating plate and a rod, and the like, and these can be appropriately selected.

Further, the method for installing an elastic sleeve according to the present invention is to install an elastic sleeve at a target installation position in an existing pipeline by using the above-mentioned diameter expanding device, for example, as in the technique described in Patent Document 1. It is a construction method of.

Prior to explaining the configuration of the diameter expanding device A according to the present embodiment, the support member, the wedge-shaped member according to the comparative example, and the wedge-shaped member according to the present embodiment will be described with reference to FIGS. 6 to 8. FIG. 6 is a diagram illustrating an initial state before the diameter of the support member 1 is expanded by using the wedge-shaped member according to the comparative example, and FIG. 8 is a diagram illustrating the initial state before the diameter of the support member 1 is expanded by using the wedge-shaped member according to the present embodiment . FIG. 7 is a diagram illustrating a state after the diameter of the support member 1 is expanded by using the wedge-shaped member according to the comparative example . Further, the installation structure of the elastic sleeve will be described with reference to FIG.

When the wedge-shaped member according to the comparative example is used, the support member 1 shown in FIG. 6 is a circular sheet having a length corresponding to the inner diameter of the pipeline in which the elastic sleeve should be installed and the thickness of the elastic sleeve 3 described later. It is bent in an arc shape to form a substantially cylindrical shape. The facing end portions 1a of the support member 1 formed in a substantially cylindrical shape are formed so as to be inclined so that both end sides (both end sides in the width direction) along the laying direction of the pipeline are inclined so that the dimensions of each other become smaller. There is. Therefore, in the support member 1 formed in a cylindrical shape, the distance between the end portions 1a facing each other is large on both end sides in the width direction and small in the central portion.

As shown in FIG. 6, the wedge-shaped member 2 according to the comparative example has an inclined piece 2a having an inclination along the inclination of the end portion 1a of the support member 1 and support members 1 on both sides of the inclined piece 2a in the thickness direction. It has a pair of holding pieces 2b arranged at the end portion 1a of the above and sandwiching the end portion 1a in the thickness direction. The holding piece 2b of the wedge-shaped member 2 according to the comparative example is formed in an arc shape having substantially the same radius as the diameter when the diameter expansion of the support member 1 is completed. Further, a hole 2d is formed which penetrates the pair of holding pieces 2b and inserts a cutting pin (not shown).

When expanding the diameter of the support member 1, first, as shown in FIGS. The wedge-shaped member 2 according to the comparative example is attached via a pin. Then, when the wedge-shaped members 2 according to the comparative example are moved in a direction approaching each other, the cutting pin is cut and the inclined piece 2a acts to separate the end portion 1a, and FIGS. As shown in, the diameter of the support member 1 can be expanded.

The support member 1 shown in FIGS. 8A and 8B is a swirl of a sheet having a length corresponding to the inner diameter of the pipeline in which the elastic sleeve is to be installed and the thickness of the elastic sleeve described later. It is formed in a shape. Therefore, the initial thickness of the support member 1 is smaller than that shown in FIG. 6 described above, which is advantageous when applied to a pipe having a small diameter or a pipe having a possibility of having an internal obstacle.

In the support member 1, both end portions 1a are formed with a slight step without facing each other, and the wedge-shaped member 2 (hereinafter, simply referred to as “wedge-shaped member 2”) according to the present embodiment is formed in a spiral shape. It is attached to the end portion 1a on the large diameter side of the supported member 1. Further, the holding piece 2b corresponding to the end portion 1a on the small diameter side of the wedge-shaped member 2 is formed with a notch portion 2c having an inclination corresponding to the inclination of the end portion 1a. In FIG. 8A, a wedge-shaped member 2 according to a comparative example is attached to one end of the support member 1, and a wedge-shaped member 2 according to the present embodiment is attached to the other end. As described above, the wedge-shaped member 2 according to the present embodiment may be attached to at least one end of the support member 1, but is preferably attached to both ends.

Then, when the spiral support member 1 is deformed so as to have a cylindrical shape, the position of the end portion 1a on the small diameter side changes so as to face the end portion 1a on the large diameter side, and the end portion 1a is wedge-shaped. It enters the notch 2c formed in the holding piece 2b of the member 2 and has the same shape as in FIGS. 6A and 6B. Hereinafter, deforming the end portion 1a of the spiral support member 1 so as to enter the wedge-shaped member 2 is referred to as "primary diameter expansion".

After that, by moving the wedge-shaped member 2 in a direction approaching each other, the inclined piece 2a separates the end portion 1a, and as a result, the support member 1 is expanded as in FIGS. 7A and 7B. It is possible to increase the diameter (secondary diameter expansion).

As shown in FIG. 9, the elastic sleeve installation structure is such that by installing the elastic sleeve 3 in a damaged part such as a crack formed in the existing pipe line B or a pipe slip, groundwater or earth and sand from the damaged part is installed. It prevents the invasion of. Further, an elastic sleeve 3 is installed at a position facing the guide joint 5 formed in the pipeline to prevent infiltration of groundwater and earth and sand from the damaged portion when the guide joint 5 is damaged by an earthquake. As described in Patent Document 2, the guide joint 5 serves as a starting point for the breakage of the pipeline B in the event of an earthquake. In this way, it is possible to improve the seismic resistance of the pipeline B by specifying the fractured portion in the pipeline B.

As shown in the figure, the elastic sleeve 3 is arranged at a position facing the guide joint 5, and the elastic sleeve 3 is pressed against the inner wall surface of the pipeline B by the support member 1 having an expanded diameter. Therefore, even if the pipe line B is broken starting from the guide joint 5, the broken part is kept in a state of being shielded from the inside of the pipe line B by the elastic sleeve 3, and is inside the pipe line B of groundwater or earth and sand. It is possible to prevent intrusion into.

Next, the diameter expanding device A according to this embodiment will be described with reference to FIGS. 1 to 5. The diameter-expanding device A shown in the figure holds the above-mentioned support member 1 and moves inside the pipeline (pipeline B in FIG. 9) on which the elastic sleeve 3 should be installed, and expands the support member 1 at a target installation position. It is configured to be diameterable. Then, the elastic sleeve 3 is arranged in advance on the outer periphery of the support member 1, and as the diameter of the support member 1 is expanded, the elastic sleeve 3 is pressed against the inner peripheral surface of the conduit B to be elastic at a desired position. It is possible to install the sleeve 3.

Therefore, the diameter expanding device A has a carriage 10. Wheels 11a and 11b are arranged at both ends of the frame 10a constituting the carriage 10 in the longitudinal direction, respectively. In particular, the wheel 11a on one side in the longitudinal direction (right side in FIG. 1) is located on the upstream side in the moving direction of the carriage 10 with respect to the holding portion 12 provided on the carriage 10, and the support member 1 is attached to the holding portion 12. It becomes an obstacle to work when holding it.

Therefore, a U-shaped attachment / detachment frame 10b to which the wheels 11a are attached is detachably arranged at one end of the frame 10a in the longitudinal direction via a thumbscrew 10c. Therefore, by loosening the thumbscrew 10c and removing the detachable frame 10b and the wheel 11a from the frame 10a, the support member 1 and the elastic sleeve 3 are inserted and held from the end portion 12a of the holding portion 12 provided on the carriage 10. Can be easily performed.

In addition, handles 10d are provided at both ends of the frame 10a in the longitudinal direction, and are configured to be easily transported by an operator.

A cylindrical holding portion 12 is arranged substantially in the center of the carriage 10 in the longitudinal direction, and the holding portion 12 is fixed to the frame 10a by bolts 12b as shown in FIG. In particular, in this embodiment, an expansion member 13 for primary expanding the diameter of the support member 1 is arranged on the outer periphery of the holding portion 12, and both end portions of the expansion member 13 are fixed to the holding portion 12 by the band 13a. ing.

The expansion member 13 is configured to be able to expand by supplying compressed air. That is, the expansion member 13 is initially in a flat state as shown by the solid line in FIG. 4 when it is attached to the holding portion 12, and expands as shown by the alternate long and short dash line when compressed air is supplied. Therefore, the expansion member 13 is provided with a coupler 14a, a relief valve 14b, and a pressure gauge 14c connected to a source of compressed air (not shown), and these are connected via a hose (not shown).

The structure of the expansion member 13 is not particularly limited, and the support member 1 can be expanded by supplying a pressure fluid such as compressed air, and the diameter of the support member 1 arranged on the outer periphery can be expanded along with the expansion at this time. Good if possible. As such an expansion member, it is possible to use a bag-shaped member made of rubber or synthetic resin having sufficiently high strength.

The stands 16 are configured at positions separated from the holding portion 12 on the frame 10a by substantially the same distance. Each stand 16 is provided with a vertical guide 17 arranged in a direction perpendicular to the upper surface 10e of the frame 10a. The vertical guide 17 is formed in a cantilever shape, and a guide member 18 is provided along the longitudinal direction of the frame 10a. Therefore, the guide member 18 is configured to be guided by the vertical guide 17 and move up and down in the vertical direction.

Each of the guide members 18 supports the locking member 19 and guides the moving direction. Since the guide members 18 are provided in pairs facing each other along the longitudinal direction of the frame 10a, when the diameter expanding device A is inserted into the pipeline B, the guide members 18 are arranged in parallel with the laying direction of the pipeline B. Will be. Therefore, the locking member 19 supported by each of the guide members 18 can be guided and moved in a direction parallel to the laying direction of the pipeline B.

Each locking member 19 sandwiches and locks the wedge-shaped member 2 in the thickness direction of the wedge-shaped member, and is driven by a drive member C described later to bring the wedge-shaped member 2 close to each other. The diameter of the support member 1 is expanded. Then, after the diameter expansion of the support member 1 is completed, the support member C is driven in a direction away from each other by the drive member C and returns to the initial position.

For this reason, each locking member 19 integrally connects the locking piece 19b in which the recess 19a for sandwiching the wedge-shaped member 2 in the thickness direction is formed, and the locking piece 19b at the upper portion and at the lower portion. It is configured to have a conductor 19c to which a rod 29 constituting the drive member C is connected. In particular, the locking pieces 19b provided on the pair of locking members 19 are configured so that the facing recesses 19a project from the conductor 19c in the direction in which they approach each other. Further, the conductor 19c is configured to penetrate the guide member 18.

The locking member 19 configured as described above can be driven by the drive member C, supported by the guide member 18, and guided by the guide member 18 in the longitudinal direction of the frame 10a to reciprocate. Further, as the diameter of the support member 1 is increased by the wedge-shaped member 2, the guide member 18 can be guided by the vertical guide 17 and reciprocate in the vertical direction. Therefore, the locking member 19 is configured to be able to reciprocate in the longitudinal direction of the frame 10a (the direction in which the conduit B is laid) and in the direction perpendicular to the upper surface 10e of the frame 10a (the radial direction of the conduit B). Has been done.

The drive member C has a function of driving a pair of locking members 19 arranged so as to approach each other or to separate them from each other. Therefore, any mechanism having such a function, such as a rack, pinion drive, or turnbuckle drive, can be used.

As shown in FIGS. 4 and 5, the drive member C according to the present embodiment has a rotating shaft 25 that stands upright in an intermediate portion of a pair of stands 16 provided on the frame 10a. On this shaft 25, a rotating plate 26 formed in two upper and lower layers of a lower rotating portion 26a arranged below and an upper rotating portion 26b arranged above and serving as a moving body is interposed via a key 25a. It is installed. Then, by applying a driving force to the lower rotating portion 26a, the upper rotating portion 26b is rotated together with the rotating shaft 25 to move the pair of locking members 19 in opposite directions.

It is necessary that the lower rotating portion 26a and the upper rotating portion 26b constituting the rotating plate 26 rotate integrally. However, the structure for integrally rotating is not limited, and the lower rotating portion 26a may be configured on the back surface side of one plate and the upper rotating portion 26b may be configured on the front surface side. Further, the lower rotating portion 26a and the upper rotating portion 26b may be formed as different parts, and these parts may be integrated by bolts or pins, or may be integrated by welding.

One end portion 27a of the rod 27 is rotatably attached to a position of the lower rotating portion 26a constituting the rotating plate 26 and eccentric to a predetermined dimension from the center. Further, the other end portion 27b is rotatably connected to the coupling member 28b attached to the cylinder rod 28a of the hydraulic cylinder 28. A drive body is composed of these rods 27 and hydraulic cylinders 28. Therefore, by selectively supplying pressure oil to the ports 28c and 28d of the hydraulic cylinder 28 to push out or pull in the rod 27, the rotating plate 26 is reciprocated at a preset angle about the shaft 25. Is possible.

Further, one end 29a of the rod 29, which is a connecting body, is rotatably attached to a symmetrical position on the diameter of the upper rotating portion 26b constituting the rotating plate 26 and separated from the center by a predetermined dimension. The other end 29b of each rod 29 is connected to the locking member 19.

Therefore, when the rotating plate 26 rotates about the shaft 25, the pair of rods 29 move in opposite directions by the same dimension along with the rotation. That is, as shown in FIG. 5, when the rod 27 is extended and the lower rotating portion 26a is rotated in the clockwise direction shown by the solid line, the upper rotating portion 26b also rotates in the clockwise direction at the same time. As the upper rotating portion 26b rotates clockwise, the locking members 19 connected to the rods 29 approach each other. Further, when the rod 27 is pulled in, the lower rotating portion 26a and the upper rotating portion 26b rotate in the counterclockwise direction, and the pair of locking members 19 are separated from each other.

In particular, the locking member 19 that locks the wedge-shaped member 2 moves in a direction approaching the inner wall surface of the pipeline B as the diameter of the support member 1 increases. That is, the locking member 19 moves along the vertical guide 17 in the direction perpendicular to the upper surface 10e of the frame 10a.

Further, as the rotating plate 26 is rotated, the rod 27 and the rod 29 are rotated between the rod 27 and the conductor 19c of the locking member 19. Therefore, it is necessary to provide a mechanism for absorbing rotation at both ends 27a and 29a of the rod 27 and the rod 29. The mechanism for absorbing the rotation provided at both ends 27a and 29a of the rod 27 and the rod 29 is not particularly limited. As such a mechanism, there is a structure in which a ball joint or a universal joint is used for the connecting portion between the rod 27 and the connecting member 28b and the connecting portion between the lower rotating portion 26a. Similarly, there is a structure in which a ball joint or a universal joint is used for the connecting portion between the rod 29 and the upper rotating portion 28b and the connecting portion between the locking member 19.

In the diameter expanding device A configured as described above, the diameter expanding device A is arranged in advance on the outer periphery of the holding portion 12, and as shown in FIG. 6A, the end portions 1a facing each other are formed in an arc shape by a wedge-shaped member 2. The connected support member 1 can be expanded in diameter at a desired position in the pipeline B.

That is, the wedge-shaped member 2 connecting the opposite ends 1a of the support member 1 to each other is sandwiched by the recess 19a of the locking piece 19b in advance, and the hydraulic cylinder 28 is driven to lock the rotating plate 26 by the rod 27. The members 19 are rotated in a direction in which they approach each other. As the rotating plate 26 rotates, the respective locking members 19 connected to the pair of rods 29 approach each other. The wedge-shaped member 2 moves in a direction approaching each other due to the approach of the locking member 19, and the diameter of the support member 1 can be increased with this movement.

As the diameter of the support member 1 increases, the elastic sleeve 3 arranged on the outer periphery of the support member 1 presses against the inner peripheral surface of the pipeline B, and the elastic sleeve can be installed at a target installation position. ..

In this embodiment, the expansion member 13 is arranged on the outer periphery of the holding portion 12, and the support member 1 is arranged on the outer periphery of the expansion member 13. Then, when compressed air is supplied from a supply source (not shown), the expansion member 13 expands and the diameter of the support member 1 is expanded (primary diameter expansion). This primary diameter expansion has a larger diameter expansion dimension than the diameter expansion by the wedge-shaped member 2 (secondary diameter expansion). Therefore, the support member 1 is formed in a spiral shape in which one end 1a enters below the other end 1a without facing the end 1a, thereby reducing the initial thickness. It becomes possible.

In particular, since the support member 1 is formed in a spiral shape, it is not possible to connect the end portions 1a of the support member 1 to each other in advance by the wedge-shaped member 2. Therefore, the sandwiching piece 2b on one side of the inclined piece 2a is formed with a notch 2c corresponding to the shape of the opposite end 1a of the support member 1 on the center side of the pipeline B, and the notch 2c is formed. Is attached to one end 1a of the support member 1 via a cutting pin inserted through the hole 2d on the opposite side to which the support member 1 is formed.

Then, due to the primary diameter expansion of the support member 1 accompanying the expansion of the expansion member 13, the other end portion 1a of the support member 1 is fitted to face the notch portion 2c formed in the wedge-shaped member 2. As a result, the facing ends 1a of the support member 1 are connected by the wedge-shaped member 2.

Next, a method of installing an elastic sleeve at a target position of the pipeline B using the diameter expanding device A will be described with reference to the drawings.

The method of installing the elastic sleeve according to the comparative example is a method of installing the elastic sleeve 3 at a target position by using the support member 1 in which the facing ends 1a are connected to each other by the wedge-shaped member 2 according to the comparative example .

In this installation method, a support member 1 (see FIG. 6) which is formed in an arc shape in advance on the holding portion 12 of the diameter expansion device A and whose facing ends 1a are connected by a wedge-shaped member 2 according to a comparative example is attached. An elastic sleeve 3 is attached to the outer periphery of the support member 1. When attaching the support member 1 and the elastic sleeve 3 to the outer periphery of the holding portion 12, the work can be easily performed by removing the detachable frame 10b arranged at one end of the frame 10a. ..

After that, the detachable frame 10b is attached to the frame 10a and fixed, and the wedge-shaped member 2 according to the comparative example is sandwiched and locked in the thickness direction by the recess 19a of the locking member 19.

Next, the diameter expanding device is inserted into the manhole of the target pipeline B, and is moved from the manhole to the installation position of the target elastic sleeve 3 in the target pipeline B. The means for moving the diameter expanding device A in the pipeline B is not limited, and a wire rope installed between manholes adjacent to the target installation position can be used. If the installation position is close to the manhole, it may be manually pushed in and moved.

After the diameter expanding device A reaches the position where the elastic sleeve 3 should be installed, the hydraulic cylinder 28 is driven to rotate the rotating plate 26 connected to the rod 27 in a direction in which the locking member 19 approaches each other. As the rotating plate 26 rotates, the respective locking members 19 connected to the pair of rods 29 approach each other, and the wedge-shaped members 2 according to the comparative example move in the direction of approaching each other. do.

In the process of the wedge-shaped members 2 according to the comparative example approaching each other, the inclined piece 2a expands the inclined surface of the end portion 1a of the support member 1 to expand the diameter of the support member 1. As the diameter of the support member 1 increases, the elastic sleeve 3 approaches the inner peripheral surface of the pipeline B and is pressed by further expansion of the diameter of the support member 1. As a result, it is possible to cover the damaged portion or the formation portion of the guide joint with the elastic sleeve 3 at the position to be installed in the pipeline B, and to hold the pressure-welded state of the elastic sleeve 3 by the support member 1. ..

As the diameter of the support member 1 increases, the locking member 19 that locks the wedge-shaped member 2 according to the comparative example approaches each other in the laying direction of the pipeline B (direction substantially parallel to the axis of the pipeline B). At the same time, it approaches the inner peripheral surface side. That is, the locking member 19 moves in the laying direction and the radial direction of the pipeline B. These movements of the locking member 19 are guided by the vertical guide 17 and the guide member 18, and smooth movement can be realized.

When the support member 1 expands in diameter and the elastic sleeve 3 is sufficiently pressed against each other, the diameter expansion with respect to the support member 1 is completed (see FIG. 7). When the diameter expansion of the support member 1 is completed, the hydraulic cylinder 28 is driven to rotate the rotating plate 26 in the direction of separating the locking member 19, and the pair of locking members 19 are separated from each other. With the separation of the locking member 19, the recess 19a is separated from the wedge-shaped member 2 according to the comparative example, and the support member 19 moves in a direction approaching the frame 10a due to its own weight. The movement of the support members 19 in the direction in which they are separated from each other and the movement of the support members 19 in the direction of the frame 10a due to their own weight are smoothly guided by the guide member 18 and the vertical guide 17.

After the disconnection from the wedge-shaped member 2 according to the comparative example of the locking member 19 is completed, the diameter expanding device A is moved from the conduit B to the manhole. As a result, the support member 1 is left in the target installation position in the pipeline B while maintaining the pressure contact state of the elastic sleeve 3, whereby the installation work of the elastic sleeve 3 at the target position is completed.

Next, the method of installing the elastic sleeve according to the present embodiment will be described with reference to FIG. This installation method is different from the installation method according to the above-mentioned comparative example in that the support member 1 formed in a spiral shape is used and the diameter of the support member 1 is first expanded by the expansion member 13.

As shown in FIG. 3A, the expansion member 13 is integrally arranged on the outer periphery of the holding portion 12 of the diameter expanding device A. A support member 1 formed in a spiral shape on the outer peripheral surface of the expansion member 13 and having a wedge-shaped member 2 arranged around one end portion 1a is arranged so as to be wound around (see FIG. 8), and further, elasticity is provided on the outer periphery of the support member 1. Place the sleeve 3. At this time, as described above, the detachable frame 10b arranged at the end of the frame 10a is removed, and the support member 1 and the elastic sleeve 3 are attached to the expansion member 13 arranged on the outer periphery of the holding portion 12. ..

After that, the detachable frame 10b is attached to the frame 10a and fixed, and the wedge-shaped member 2 is sandwiched and locked in the thickness direction by the recess 19a of the locking member 19. Further, the hydraulic hose 35 is connected to the ports 28c and 28d of the hydraulic cylinder 28, and the air hose 36 is connected to the coupler 14a, inserted into the pipeline B in the same manner as described above, and moved to the target installation position.

After the diameter-expanding device A reaches the target installation position, compressed air is supplied to the expanding member 13 from a source of compressed air (not shown) via the air hose 36, and the expanding member 13 is expanded. As the expansion member 13 expands, the support member 1 has a primary diameter increase, and the other end 1a faces the notch 2c formed in the wedge-shaped member 2 attached to one end of the support member 1. Fit. Therefore, the facing end portions 1a of the support member 1 are connected by the wedge-shaped member 2. When the facing end portions 1a of the support member 1 are connected by the wedge-shaped member 2, the supply of compressed air to the expansion member 13 may be stopped.

After that, in the same manner as described above, the hydraulic cylinder 28 is driven and the rotating plate 26 connected to the rod 27 is rotated in the direction in which the locking member 19 approaches each other, so that the wedge-shaped members 2 approach each other. Move in the direction. Then, as the wedge-shaped member 2 approaches, the diameter of the support member 1 expands, and as a result, the elastic sleeve 3 is pressed against the inner peripheral surface of the conduit B. Therefore, it is possible to cover the target installation position in the pipeline B with the elastic sleeve 3 and to hold the pressure contact state of the elastic sleeve 3 with the support member 1.

After the diameter expansion of the support member 1 is completed, when the hydraulic cylinder 28 is driven to rotate the rotating plate 26 in the direction in which the locking member 19 is separated, the recess 19a is formed as the locking member 19 is separated. It separates from the wedge-shaped member 2. Then, after the locking member 19 is separated from the wedge-shaped member 2, the diameter expanding device A is moved from the conduit B to the manhole, so that the support member can be placed at the target installation position in the conduit B. 1 is left behind while holding the pressure contact state of the elastic sleeve 3. This completes the installation work of the elastic sleeve 3 at the target installation position.

In the diameter expanding device according to the present invention, regardless of the diameter of the existing pipe, the worker can install the elastic sleeve at the target position without getting into the pipe, so that the existing pipe can be installed. It is advantageous to use when installing an elastic sleeve at the damaged part of the road, the formation part of the guide joint, or the connection part of the straight wall pipe in the assembly manhole.

A Diameter expansion device B Pipe line C Drive member 1 Support member 1a End part 2 Wedge-shaped member 2a Inclined piece 2b Holding piece 2c Notch 2d Hole 3 Elastic sleeve 5 Induction joint 10 trolley 10a Frame 10b Detachable frame 10c Thumbscrew 10d Handle 10e Top 11a, 11b Wheel 12 Holding 12a End 12b Bolt 13 Expansion member 13a Band 14a Coupler 14b Relief valve 14c Pressure gauge 16 Stand 17 Vertical guide 18 Guide member 19 Locking member 19a Recess 19b Locking piece 19c Conductor 25 Shaft 25a Key 26 Rotating plate 26a Lower rotating part 26b Upper rotating part 27, 29 Rods 27a, 27b, 29a, 29b
End 28 Hydraulic Cylinder 28a Cylinder Rod 28b Coupling Member 28c, 28d Port 35 Hydraulic Hose 36 Air Hose

Claims (5)

It is formed in a spiral shape, and both ends in the circumferential direction and both ends in the width direction are inclined. A device for expanding the diameter of a support member to which a wedge-shaped member having a notch corresponding to the inclination of the end is attached .
A dolly that is configured to be movable in the pipeline and has a holding portion that holds the support member on the outer peripheral portion.
Each of the notches of the wedge-shaped member arranged on the outer periphery of the holding portion of the trolley and on the inner peripheral side of the supporting member held by the holding portion and having the support member primarily expanded in diameter and attached to the end portion. A primary diameter expanding member that engages a widthwise end on the other side of the support member in the circumferential direction.
The width direction is one side of the end portion of the spiral support member held by the holding portion, which is movably arranged at the opposite position of the trolley and is movable in the longitudinal direction and the vertical direction of the trolley and faces the circumferential direction. A pair of locking members that lock each pair of wedge-shaped members arranged on both sides, and a pair of locking members.
A drive member arranged on the carriage and driving the pair of locking members so as to approach or separate from each other.
A diameter expanding device characterized by having. The pair of locking members have a locking piece having a recess formed in the facing surface to fit and lock the end portion of the wedge-shaped member, and the end portion of the locking piece is the above-mentioned. A guide member that protrudes from the end of the holding portion toward the center and guides the movement of the pair of locking members in the direction of approaching or separating from each other is arranged in the longitudinal direction of the carriage. The diameter-expanding device according to claim 1, wherein a vertical guide is arranged to guide the pair of locking members to move in the vertical direction of the carriage . The drive member is fixed to the rotating shaft, a pair of connecting bodies whose ends are connected to the locking member, and the rotating shaft arranged on the bogie, and is engaged with the pair of connecting bodies. It has a moving body that moves in different directions and a driving body that drives the rotating shaft, and is configured to drive the pair of locking members so as to approach or separate from each other. The diameter expanding device according to claim 1 or 2. The primary diameter expansion member is composed of an expansion member that expands by a pressure fluid arranged on the outer periphery of the holding portion of the carriage, and a supply pipe that supplies the pressure fluid to the expansion member is arranged on the carriage. The diameter expanding device according to any one of claims 1 to 3. A method for installing an elastic sleeve using the diameter-expanding device according to any one of claims 1 to 4 .
In advance
An expansion member that expands due to pressure fluid is placed on the outer circumference of the holding portion of the carriage constituting the diameter expansion device, and is formed in a spiral shape on the outer circumference of the expansion member, and is formed on one side in the circumferential direction and at both ends in the width direction. A support member having a pair of wedge-shaped members having a notch corresponding to the inclination of the end portion attached to the holding piece holding the end portion and one side piece of the holding piece is arranged, and further, the outer circumference of the support member is arranged. Place an elastic sleeve with elasticity in
A pair of wedge-shaped members arranged at both ends in the width direction on one side of the support member arranged in the holding portion in the circumferential direction is fitted with recesses formed in the pair of locking members constituting the diameter-expanding device. Match and lock,
after that,
Move the dolly to the position where the elastic sleeve should be installed in the pipeline,
At the moving position, the pressure fluid is supplied to the expanding member via the supply pipe to expand the member, so that the spirally formed support member is primarily expanded in diameter and formed into the notch portion of the pair of wedge-shaped members. Both ends in the width direction are engaged with each other on the other side in the circumferential direction of the support member.
After the primary diameter expansion is completed, the pair of locking members are brought close to each other by the driving member arranged on the carriage, and the support member is further secondary expanded by the wedge-shaped member attached to the support member. A method for installing an elastic sleeve, characterized in that an elastic sleeve arranged on the outer periphery of the support member having a diameter is pressed into contact with a position to be installed in a pipeline.

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