JP6954752B2 - Tube lifting device - Google Patents

Description

The present invention is used in a construction method in which fluid transportation pipes used for water supply, gas, sewerage, etc. are arranged in an existing sheath pipe, and a new pipe arranged in the sheath pipe is placed on a traveling carriage and placed in the sheath pipe. It relates to a pipe lifting device used when carrying in and removing a traveling carriage at a predetermined place.

As a method of burying various fluid transportation pipes such as ductile cast iron pipes in the ground, pipes newly installed by the propulsion method or shield method are used as sheath pipes (sheath pipes), and new pipes such as ductile cast iron pipes are inside. (Hereinafter, simply referred to as "new pipe") may be adopted. In some cases, an existing pipe that is already in service is used as a sheath pipe, and a new pipe having a small diameter is inserted into the sheath pipe to renew the pipe line.

One construction method of this type is shown in FIG. 3, in which the new pipe P is transported to a predetermined arrangement place in the sheath pipe P'buried in the ground and used as the socket 2 of the new pipe P in the future. A pipeline is constructed by connecting the insertion ports 1 of the new pipe (carry-in pipe) P to the rear in order.
For the transportation of the new pipe P, a traveling carriage (transporting carriage) 3 is attached to the new pipe P, and the traveling carriage 3 is provided with wheels 3a, and the rolling of the wheels 3a on the rail R causes the new pipe P to be transported. The new pipe P runs in the sheath pipe P'. Therefore, the new pipe P travels in the sheath pipe P'by being towed or propelled by the electric work vehicle 4, and is transported to a predetermined arrangement location. In the figure, 5 is a connecting device for connecting the traveling carriage 3, the electric work platform 4 and the carriage, 6 is a hydraulic jack for centering the new pipe P, and M is a worker (Patent Document 1, paragraphs 0017 to 0021). , See Figures 1 and 2).
When the traveling carriage 3 is removed after the new pipe P has been transported to a predetermined arrangement location, it is necessary to temporarily lift the new pipe P. Therefore, a pipe lifting device is used in the sheath pipe P'.

As shown in FIGS. 3 and 4, the pipe lifting device A is provided on a horizontal base member 30 spanning between the inner surfaces of sheath pipes P'such as steel pipes and concrete pipes (Hume pipes), and the base member 30 thereof. The new pipe P is composed of a screw jack 31 in the vertical radial direction, and the upper end of the screw jack 31 is locked to the upper end of the receiving port 2 of the new pipe P by a hook 32, and the screw jack 31 is extended to extend the new pipe P. Some lift the pipe P (see Patent Document 1, FIGS. 1, 2, etc.).
There is also a pipe lifting device that lifts the new pipe P by attaching a pair of jacks below the socket 2 of the new pipe P and pressing the advancing / retreating rod of the jack against the inner surface of the sheath pipe P'(Patent Document). 2. See Fig. 4 etc.).

Japanese Unexamined Patent Publication No. 2016-2235999 Japanese Unexamined Patent Publication No. 2014-141997

The conventional pipe lifting device A described in Patent Document 1 sandwiches the upper portion of the receiving port of the new pipe P, and the sandwiching may damage the inner surface of the pipe.
Further, since the pipe lifting device of Patent Document 2 also has a jack attached to the receiving port 2 of the new pipe P, the inner surface of the pipe may be damaged in the same manner.
Since the inner surface of the new pipe P is a flow surface for the painted fluid, it is not preferable that the surface is damaged.
Further, the conventional pipe lifting device has a large number of parts, and it takes time and effort to install and disassemble the pipe.

An object of the present invention is to lift a new pipe with another novel configuration under the above circumstances.

In order to achieve the above object, the present invention has decided to push up both lower sides of the new pipe by jacks fixed to the sheath pipe.
Since it is lifted on the outer peripheral surface of the new pipe, there is no risk of damage to the inner surface of the pipe.

As a specific configuration of the present invention, in a pipe lifting device that lifts the new pipe when the traveling carriage used for running the new pipe in the sheath pipe is removed from the new pipe, the pipe is hung between the inner surfaces of the sheath pipe. Both jacks have a base member to be passed, a tension member provided between the base member and the inner surface of the sheath pipe to fix the base member to the sheath pipe, and jacks fixed to both ends of the base member. The advancing / retreating rod of the new pipe has adopted a structure in which the new pipe is lifted by contacting both sides of the vertical center line on the outer surface below the horizontal center line of the new pipe.

In this configuration, if the base member is curved upward, a space is created in the lower central portion of the new pipe, so that the trolley can pass through the space, while both ends of the base member are Since it is located below the sheath tube, it is easy to position the jack below the sheath tube.

In the present invention, as described above, the new pipe is lifted by the outer peripheral surface thereof, so that the new pipe can be lifted stably without damaging the inner surface of the new pipe.

An embodiment of a pipe lifting device according to the present invention is shown, (a) is a vertical sectional view, and (b) is a right side view of cutting. Other embodiments of the pipe lifting device according to the present invention are shown, (a) is a vertical sectional view, and (b) is a right side view of cutting. Schematic vertical cross-sectional view of an example of a conventional pipe lifting device (A) is an enlarged view of the main part of FIG. 3, and (b) is a right side view of the same cut.

An embodiment of the pipe lifting device according to the present invention is shown in FIG. 1, and in this embodiment, a new pipe P is arranged in a sheath pipe P'buried in the ground as in the conventional case shown in FIG. In order to do so, the new pipe P is placed on the traveling trolley 3 and transported to a predetermined arrangement place in the sheath pipe P', and then when the traveling trolley 3 is pulled out from under the new pipe P, the new pipe P is pulled out. It is a pipe lifting device 10 used for lifting. Steel pipes, concrete pipes (Hume pipes), shield pipes (tunnels) and the like are adopted as the sheath pipe P', and concrete pipes, ductile cast iron pipes and the like are adopted as the new pipe P.

The new pipe P has a joint structure in which the insertion port 1 is inserted into the receiving port 2 whose inner surface is the painted distribution surface and joined, and after being brought into the sheath pipe P', the receiving port of the new pipe P in the future The insertion port 1 of the new pipe P to be connected to 2 is connected in order to construct a pipe line composed of a plurality of new pipes P.
The form of the joint portion between the new pipes P is appropriately selected according to the application and specifications of the pipe line. For example, a protrusion is provided at the tip of the insertion port 1 and a lock ring is provided on the inner surface of the receiving port 2, and the insertion port 1 is inserted into the receiving port 2 with a rubber ring or the like interposed therebetween. It is possible to adopt a structure in which the rubber is pushed into the gap between the insertion port 1 and the receiving port 2 to seal the rubber.

As shown in FIG. 1, the pipe lifting device 10 of this embodiment includes a base member 11 bridged between the lower inner surfaces of the sheath pipe P', a tension member 12 for fixing the base member 11 to the sheath pipe P', and a support member 12. It has jacks 13 fixed to both ends of the base member 11.

The base member 11 is made of a square steel material, an H-shaped steel material, or the like, and a reinforced plastic material can also be used.
The tension member 12 is of a screw jack type, and its length is changed by screwing a bolt-shaped male screw 12a into a female screw 12b. Therefore, as shown in the figure, when the male screw 12a is provided between the base member 11 and the upper inner surface (ceiling surface) of the sheath pipe P'and the male screw 12a is advanced with respect to the female screw 12b, the base member 11 and the sheath pipe are formed. The base member 11 is fixed to the sheath tube P'by stretching between the ceiling surfaces of P'.

As the jack 13, a hydraulic jack or a screw jack can be adopted. The mounting and fixing of the new pipe P at both ends of the base member 11 of the jack 13 to the lower side is performed via the bracket 14 and the jack holder 15. The bracket 14 has a U-shaped member 14a screwed to the base member 11 and a mounting piece 14b extending downward from the lower flange of the U-shaped member 14a, and the jack holder 15 is attached to the mounting piece 14b. It is fixed with screws.
The jack 13 is fitted to the jack holder 15 to be supported and fixed, and the advancing / retreating rods 13a of the jacks 13 at both ends of the base member 11 are oriented downward symmetrical positions of the vertical center line c of the new pipe P. The orientation of the rod 13a is adjusted by the mounting angle of the jack holder 15 with respect to the mounting plate 14b.

This embodiment has the above configuration, and in order to lift the new pipe P by the pipe lifting device 10 of this embodiment, first, as shown in FIG. 1, the base is below the horizontal center line b of the sheath pipe P'. The member 11 is bridged, and the base member 11 is fixed in the sheath pipe P'with the tension member 12.

Next, jacks 13 are attached to both ends of the base member 11. This attachment may be performed before or after fixing the base member 11 to the sheath tube P', but the bracket 14, the jack holder 15, and the jack 13 are attached in this order. At this time, the rod 13a of the jack 13 may be brought into contact with the outer peripheral surface of the new pipe P. It is preferable to attach a cushioning member such as rubber to the tip end portion (contact portion) of the rod 13a.

In this state, when the progress of the rod 13a of the jack 13, the rod 13a is in contact with the lower side beneath the outer peripheral surface of the symmetrical new pipe P, or because it is in contact, with the progress of the above it As shown by the chain line in FIG. 1 (b), the end portion of the new pipe P is lifted without damaging the coating distribution surface on the inner surface thereof.
When the new pipe P is lifted to the required height, the traveling trolley 3 is pulled out from below the new pipe P, and the traveling trolley 3 separates from under the new pipe P and reaches a predetermined position in the same manner as before. For example, the rod 13a of the jack 13 is retracted, and the new pipe P is placed at a predetermined height at the bottom of the sheath pipe P'with the new pipe P interposed therebetween. After that, the jack 13 is removed, and the tension member 12 and the base member 11 are also removed from the sheath tube P'to complete the work.

FIG. 2 shows a pipe lifting device of another embodiment, in which the base member 11 has an upward curved shape (upward arch shape) in the above embodiment. In this way, if the shape is curved upward, a space is created in the central portion below the new pipe P, so that the traveling carriage 3 can pass through the space, while both ends of the base member 11 are sheath pipes P. Located below the'. Therefore, the jack 13 can be positioned below the sheath tube, the bracket 14 can be omitted, and the shape thereof can be simplified. In FIG. 2, the jack holder 15 is directly attached to the base member 11 with bolts and nuts 16.
Similarly, in the pipe lifting device of this embodiment, the rod 13a of the jack 13 is advanced to lift the end portion of the new pipe P.

In the above embodiment, the sheath tube P'has no ribs on its inner surface, but even if the sheath tube P'has the ribs (see Patent Document 2, FIGS. 2 to 4, etc.), the present invention Of course, can be adopted. The number of the tension members 12 is not limited to one, and a plurality of tension members 12 may be provided in the length direction of the base member 11. At this time, it is preferable that each of the tension members 12 is positioned symmetrically with respect to the vertical center line c.
Further, in this embodiment, the new pipe P is lifted on the receiving port 2 side, but it is also possible to lift the new pipe P on the insertion port 1 side depending on the direction of the new pipe P in the sheath pipe P'.
Thus, the embodiments disclosed this time should be considered to be exemplary in all respects and not restrictive. The scope of the present invention is indicated by the claims and is intended to include all modifications within the meaning and scope equivalent to the claims.

1 Insertion port 2 Receptacle 3 Traveling trolley (transporting trolley)
4 Electric work vehicle 5 Connecting device 10 Pipe lifting device 11 Base member 12 Strut material 13 Jack 13a Jack advance / retreat rod 14 Bracket 15 Jack holder 16 Jack holder mounting bolt / nut P New pipe P'Sheath pipe

Claims (2)

When the traveling carriage (3) used to run the new pipe (P) whose inner surface is the painted distribution surface in the sheath pipe (P') is removed from the new pipe (P), the new pipe (P) ) Is a pipe lifting device that lifts
The base member (11) is provided between the base member (11) bridged between the inner surfaces of the sheath pipe (P') and the inner surface of the base member (11) and the sheath pipe (P'), and the base member (11) is sheathed. It has a tension member (12) fixed to the pipe (P') and a jack (13) fixed to both ends of the base member (11) and located below the new pipe (P). The advancing / retreating rod (13a) of the jack (13) abuts on both sides of the vertical center line (c) on the outer surface below the horizontal center line (b) of the new pipe (P) from below, and the advancing / retreating rod (13a) A pipe lifting device that lifts the new pipe (P) with its lower outer surface by advancing upward so as not to damage the painted distribution surface. The pipe lifting device according to claim 1, wherein the base member (11) is curved upward.

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