JPS60188539A - Method and apparatus for piping work in existing pipe - Google Patents

Abstract

PURPOSE:To repair existing long pipes by a method in which plural new pipes are penetrated into an existing pipeline from a vertical pit by means of an end- press jack until a given length of the pipes are penetrated, and the new pipes are further penetrated by means of a mid-press jack. CONSTITUTION:New pipes 17a and 17b are orderly inserted into a superannuated existing pipeline 11 by means of an end-press jack 15. When a limit strength to withstand the pressure of the pipe is reached, a mid-press oil-pressure jack 20 is interposed between the new pipes 17e and 18a, and the new pipes 17 and 18 are further penetrated by repeated operations of the jacks 15 and 20. When the top pipe 17a reaches the forward vertical pit 13, the jack 20 is removed out and the new pipe 18 is advanced to complete the construction work.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for applying fresh snow to an existing aging pipeline.

Conventionally, in the existing pipe piping method, which involves inserting a new pipe into the existing pipe, when the piping distance of the existing pipe is long,
When propelling a large number of inserted vessel tubes together using jacks installed in the launch shaft, there was a limit to the strength of the tubes themselves to withstand the oppression, so propulsion had to be interrupted midway through insertion.

Therefore, as shown in Fig. 1, starting shafts 2 and 2a are provided at both ends of the existing pipeline 1, and a reaching shaft 3 is provided in the middle of the pipeline 1, and the starting shafts 2 and 2a are installed in the starting shafts 2 and 2a, respectively. 5
, 5a to insert the new tube 7.8, and when the tips of both 'iJr tubes reach the reaching hole 3, join the tips together in this reaching hole 3, or as shown in Fig. 2. A coupling ring 4' is installed in advance in the middle part of the existing pipeline 1', and a starting hole τ, 2 is installed in advance.
New pipes 7' and 8' are inserted using the pusher jacks 5' and 5m' installed at a', respectively, and the tips of both new pipes are joined to both ends of the coupling ring 4'.

However, in the former case, if it is not possible to install the reaching shaft 3 due to external factors such as traffic or housing conditions,
There is an inconvenience that this construction method cannot be implemented.

Furthermore, in the latter case, the number of joints increases, which complicates the piping work and increases costs.

In view of the above-mentioned circumstances, this invention enables long-distance piping without the need to provide a reaching hole or a joint in the middle of the existing pipe, and also allows insertion of a new pipe from one shaft. The purpose of this project is to provide a method of piping construction within existing pipes that can be carried out, and equipment that can be used directly to implement this method.

In order to achieve the above-mentioned object, the present invention provides at least one end of the existing pipe with a vertical shape that opens on the side of the pipe,
A leading pipe consisting of a plurality of new pipes from this vertical shape is inserted into the pipe line by the operation of the main push jack installed in the shaft while sequentially joining its front and rear ends 8, and this leading pipe is inserted into the pipe line. When the length of the violet is inserted, the rear end of the leading tube contacts the main push jack, and the tip of the trailing pipe, which is made up of multiple new pipes to be inserted next, whose rear end contacts the main push jack. A middle push jack is installed in between, and the leading pipe is further inserted by the action of this middle push jack, and then after the middle push jack is released, the rear pipe is inserted by the operation of the main push jack.

Insert the bamboo pipe so that the middle push jack touches the rear end of the preceding pipe, and if necessary, repeat the operation of the middle push jack and main push jack as described above to insert and arrange the new pipe into the conduit. The present invention provides a piping construction method within an existing pipe, which is characterized by:

Furthermore, this invention is directly used for carrying out the above-mentioned construction method, and includes a socket for a leading pipe consisting of a plurality of new pipes to be inserted into an existing pipe, and a plurality of @r pipes to be inserted following the leading pipe. a hollow cylindrical portion that is located between the insertion port of the trailing tube and the insertion port of the trailing tube and that is fitted into the outer surface of the insertion port of the trailing tube; and a support portion that is provided inward in a right angle direction from one end surface of the hollow cylindrical portion. , the other end opening 8 of the cylindrical part of the reaction force receiving member that can be divided into a plurality of pieces is inserted into and locked into the insertion port of the trailing pipe, and the operating rod is attached to the support part of the reaction force receiving member, and the operating rod is connected to the leading pipe. An intermediate push jack is installed so as to face the socket of the front pipe, and a thrust transmission member is attached to the socket of the leading pipe, which receives thrust by colliding with the operating rod of the middle push jack and transmits this thrust to the leading pipe. The present invention provides a pipe propulsion device for use in existing pipe piping construction methods.

Hereinafter, this invention will be explained in more detail with reference to embodiments shown in FIG. 3 and subsequent figures.

In FIG. 3, 11 is an existing pipe, 12 is a starting shaft, ]3 is a reaching shaft, and 15 is a hydraulic jack for pushing the main shaft (hereinafter referred to as the main pushing jack).

In order to install a new pipe into such an existing pipe line 11, the leading pipe 1 consisting of a plurality of new pipes 17a, 17b, etc. is moved from the starting hole 12 toward the destination hole 13 using the pusher jack 15.
7 is inserted into the conduit 11 while sequentially fitting and joining the insertion opening of the new pipe 17b into the socket of the new pipe 17a. At this time, the main push jack 15 whose operation was canceled and the leading pipe]
The process of successively interposing a plurality of spacers between the sockets of each of the new tubes 17a, 17b, etc. in order to form a space in which a new tube to be inserted next can be placed will be described later. The same is true for pipes.

Then, when the leading new pipe 17a of the leading pipe J7 comes to the middle position of the pipe line 11 and the strength of the pipe itself to withstand oppression has reached its limit, the last succeeding pipe 17a of the leading pipe J7 comes into contact with the main push jack 15. A plurality of new pipes 18a, 18b to be inserted after the socket of the new pipe 17e and the socket contacts the original pusher jack 15.
An intermediate push hydraulic jack 20 (
below.

Install a medium press jack. After that, the leading new pipe 18 of the trailing pipe 18 is moved by the operation of the main push jack 15.
Insert g until the operating rod of the intermediate push jack 20 contacts the socket of the last new pipe 17e of the leading pipe 17 (FIG. 4).

In this state, the leading pipe 17 is inserted by one stroke of the operating rod of the intermediate push jack 20 by operating the intermediate push jack 20 (FIG. 5).

Next, while releasing the operation of the middle push jack 20,
The operation of the main push jack 15 is released, and the main push jack 15 whose operation has been released and the leading new pipe 18 of the trailing pipe 18 are
A plurality of spacers 21 are interposed between the socket of
figure). Thereafter, the leading new pipe 18a and the spacer 21 of the trailing pipe 18 are inserted by the operation of the main pushing jack 15 until the operating rod of the middle pushing jack 20 contacts the socket of the last new pipe 17e of the leading pipe J7. Figure 7).

In this state, by operating the intermediate pusher jack 20, the leading pipe 17 is inserted further into the stroke of the operating rod of the inner pusher jack 20 (FIG. 8).

Next, while releasing the operation of the middle push jack 20,
The operation of the main push jack 15 is released, and the spacer 2 inserted between the main push jack [5] whose operation has been released and the leading new pipe 18a is removed (FIG. 9). Then, a new pipe 18 next to the trailing pipe 18 is placed in a space corresponding to the removed spacer 21 and the release stroke of the operating rod of the original pusher jack 15.
b, the socket of the succeeding new pipe 18b is brought into contact with the main push jack 15, and the insertion port is brought into contact with the socket of the leading new pipe 18a (Fig. 10), and by the operation of the main push jack 15, Insert both new pipes 18a and 18b until the operating rod of the intermediate pusher jack 20 contacts the socket of the last new pipe 17e of the leading pipe 17 (FIG. 11). In this state, by operating the intermediate pusher jack 20 again, the leading pipe [7] is further inserted by one stroke of the operating rod of the inner pusher jack 20. Hereinafter, the operation of the intermediate push jack 20 is released, the operation of the single push jack [5] is released, and the spacer 21 is inserted between the released main push jack [5] and the socket of the succeeding new pipe 18b. By interposing a plurality of pipes and returning to the state as shown in FIG. 6, and repeating the operation of both the jacks 15 and 20 as described above, the trailing new pipes 18c, 18d, etc. of the trailing pipe 18 are removed. gradually increase the number of

When the leading new pipe 17a of the leading pipe 17 reaches the reaching hole 13, the intermediate pusher jack 20 is removed, the trailing pipe 18 is inserted by the operation of the main pushing jack 15, and the leading new pipe of the trailing pipe 18 is inserted. The insertion port of 18a is inserted into the socket of the last new pipe 17e of the leading pipe 17 and joined (12.13.
Figure 14).

With this, the piping work of the new pipe into the existing pipe line 11 is completed.

In this embodiment, one set of intermediate push jacks 20 was installed.
It goes without saying that the invention is not limited to this, and if the pipe line is long, multiple sets may be installed as necessary. 1st
FIG. 5 shows an example in which a plurality of sets of intermediate push jacks 20 are installed.

16 to 18 show a tube propulsion device using an intermediate push jack 20, and 31 is a reaction force receiving member composed of a plurality of members 31a to 31d divided in the circumferential direction. Each of the constituent members 31a to 31d of the member 31 includes hollow cylindrical portion forming portions 32a to 32d, and support portion forming portions 33a to 33 provided inward in a perpendicular direction from one end surface of this portion.
d, and has a drawing piece 3 on both sides in the circumferential direction.
2a to 32d and 33a to 33d have cotton mounting flanges 34, and the flanges 34 are butted against each other, and the i-lut nut 3 is attached to a through hole provided in the flange 34.
By tightening and fixing 5, the reaction force receiving member 3, which includes a hollow cylindrical portion 32 and a support portion 33, can be assembled. Hollow cylindrical portion 3 of such receiving member 31
The other end opening of 2 is fitted into the outer surface of the insertion port of the leading new tube 18a of the trailing tube 18, and the other end surface is adapted to be locked to a stopper ring 37 fixed to the outer surface of the insertion port. . A plurality of intermediate push jacks 20 are installed at equal intervals in the circumferential direction on the support portion 33 of the reaction force receiving member 31 so that the operating rod 20a faces the socket of the last new pipe 17e of the leading pipe 17.
The base end flange portion 20b of the intermediate pusher jack 20 is fixed to the support portion 33 via a not-shown bolt nut. The intermediate push jacks 20 are each connected to a pressure oil supply source through an oil supply hose (not shown), so that they operate synchronously. 38 is a sled, and 39t is a reinforced rizo. 41 is a plurality of members 41a to 4 divided in the circumferential direction.
Each component 41a to 41d of the thrust transmission member 41 includes hollow cylindrical portion forming pieces 42a to 42d, and a transmission member provided inward in a perpendicular direction from one end surface of this part. It has locking part forming pieces 43a to 43d and locking part forming pieces 44a to 44d provided outward, and both pieces 42a to 42 are provided on both sides in the circumferential direction.
A mounting flange 45 is provided between 2d and 43a to 43d, and the flange 45 is butted against each other.
The hollow cylindrical part 42 and the transmission part 43 are connected by tightening and fixing the Zelt nut 46 attached to the through hole provided in the hollow cylindrical part 42 and the transmission part 43,
and a locking portion 44, so that the thrust transmission member 41 can be assembled. In this way, the other end opening of the hollow cylindrical portion 42 of the transmission member 41 is fitted into the inner surface of the socket of the last new pipe 17e, and the locking part 44 is locked to the end surface of the socket. . Further, the tip of the operating rod 20a of the intermediate push jack 20 can come into contact with the transmission portion 43 of the transmission member 41, and the thrust force of the intermediate push jack 2o is transferred to the leading pipe 17.
can be transmitted to.

47 is a reinforced reso.

When inserting the trailing pipe 18, the reaction force receiving member 31 and the thrust transmitting member 41 as described above are carried into the starting shaft 12 in a pre-assembled state, and are inserted into the socket and insertion port of the new pipe, respectively. On the other hand, the leading new pipe 17m of leading pipe 17 reached the hole】3
When reaching and removing the intermediate push jack 20, it is disassembled and the intermediate push jacks 2o and 4 are connected to the starting hole 12 or the reaching hole 13.
will be removed from.

Although the above-mentioned projection reaction force receiving member 31 and thrust force transmitting member 4 are shown as being divided into four parts in the circumferential direction, the number of parts is not limited as long as they are divisible. Moreover, both members 31.
The detailed design of 41 can be changed or modified as appropriate, and the number of intermediate push jacks 20 may be one.

In addition, in the above embodiment, the existing pipe is provided with a shaft opening on the side at both ends of the pipe, and a plurality of new pipes are inserted into the pipe from one shaft to the other shaft. However, in addition, a shaft is provided at one end of the existing pipe, and this single shaft can be used to insert multiple new pipes into the pipe, and connect the tips of the pipes to the existing pipes at a desired distance from the shaft, for example. Since the present invention is as described above, a reaching hole is provided in the middle of the existing pipe. New pipes can be installed over long distances without the need to install joints or fittings in advance, and when installing new pipes, the new pipes can be inserted through a single shaft provided in the existing pipe.
Unlike the conventional method, there is no need to arrange equipment such as head jacks and personnel in two shafts, so workability is good, it is economical, and the construction period can be shortened.

In addition, even if the length of the existing pipeline is long, there is no need to replace the main push jack with one with greater thrust each time, and by increasing the number of intermediate push jacks, the conventional main push jack can be used. It has excellent effects such as:

[Brief explanation of the drawing]

Fig. 1.2 is a schematic explanatory diagram of the conventional piping construction method in existing pipes, Figs. 3 to 14 are successive schematic explanatory diagrams of the construction method according to the present invention,
Figure 815 shows an example of the construction method according to this invention. Y
ISitjtlEIIS-Flute 14151+a+)-M
Figure 17 is a longitudinal sectional front view of the pipe propulsion device directly implemented in the construction method by W Ming. Figure 17 is a left side view with half omitted along the X■-seat line in Figure 16. Figure 18 is the )N It is a right side view with half omitted along line -X■11. 11... Existing pipe line 12... Starting hole 13... Arrival hole 15... Hydraulic jack for main push 17... Leading pipe] 8... Trailing pipe 20... Hydraulic jack for intermediate pushing 21... Spacer 31... Reaction force receiving member 32... Hollow cylindrical portion 33...
・Support part 41... Thrust transmission member 42... Hollow cylindrical part 43... Cleaning of the drawing of the transmission part (No change in 'i'j:) Foil 11 Recession 12 Recessed part 16 Flash procedure numbered part Official document (method) % formula % 3. Relationship with the case of the person making the amendment Patent applicant 1-12-19 Kitahorie, Nishi-ku, Osaka, Osaka Prefecture Kurimoto Iron Works Co., Ltd. Representative Riki Igarashi 4, Agent 1988 May 29th 6. Drawings to be amended 7. Appropriate drawings will be submitted as shown in the attached contents of the amendment. 8. 1 copy of Toyoru Soiki's comments and drawings

Claims (1)

[Scope of Claims] L A shaft in which the existing pipe opens on the side is provided at least at one end of the pipe, and a leading pipe consisting of a plurality of new pipes is connected from this shaft,
While sequentially joining the leading and trailing ends, it is inserted into the pipe by the operation of the main push jack installed in the shaft, and when the leading pipe is inserted into the pipe to the desired length, it comes into contact with the main push jack. The rear end of the leading pipe that has been inserted, the rear end of which is in contact with the original push jack, is the next multiple new pipes 7 to be inserted! J) An intermediate push jack is installed between the leading end of the trailing pipe and the leading pipe 8 is further inserted by the operation of this middle push jack, and then after the operation of the middle push jack is released, the trailing pipe is inserted by the operation of the main push jack. Piping in an existing pipe, characterized in that the forward pipe is inserted until the intermediate push jack comes into contact with the rear end of the preceding pipe, and if necessary, a new pipe is inserted into the conduit using the above-mentioned intermediate push shirt. Construction method. 2. Between the socket of a leading pipe consisting of a plurality of new pipes inserted into an existing pipe and the insertion port of a trailing pipe consisting of a plurality of new pipes inserted following the leading pipe, The cylindrical portion of the reaction force receiving member that can be divided into a plurality of pieces includes a hollow cylindrical portion that is fitted into the outer surface of the socket, and a support portion that is provided inward at right angles from one end surface of the hollow cylindrical portion. Insert and lock the other end opening into the insertion port of the trailing tube, and attach it to the support part of this reaction force receiving member.
Operating rod force S A middle push jack is installed so as to face the direction of the socket of the leading pipe, and a thrust transmission member that butts against the working rod of this middle push jack to receive thrust and transmits this thrust to the leading pipe is installed at the socket of the leading pipe. A pipe propulsion device for the existing pipe piping method, which is characterized by being installed in the pipe.