JP2000209727A - Method and apparatus for piping connection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently connect and arrange a number of pipes, reduce the number of workers in a ditch, and furthermore, achieve simplification and size reduction of a piping apparatus. SOLUTION: Newly installed pipes 15 are hung and carried into a ditch 40, transferred by a transfer means 27 and jointed with existing pipes 15a already installed in the ditch 40. When the new pipes 15 are transferred toward the existing pipes 15a, retaining means 11 retains the existing pipes 15a to make the existing pipes 15a remove a counter force applied in a direction opposite to the transfer direction of the new pipes 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for connecting pipes which are most suitable for laying pipes buried in the ground, and more particularly to a pipe connecting method for power cable protection pipes and the like. The present invention relates to a pipe connection method for laying a large number of pipes and a pipe apparatus used in the method.

[0002]

2. Description of the Related Art For example, power cables are often routed underground such as under roads. As described above, when the power cable is laid underground, a method of passing the cable through a cable protection pipe is adopted in order to prevent short-circuit and pain of the cable due to groundwater or the like. That is, when the power cable is routed underground, a plurality of cable protection pipes are laid, and the cables are passed through the cable protection pipes.

[0003] In the technical field of laying pipes underground, little technical innovation has been made. Generally, a trench is excavated, a plurality of workers enter the trench, and pipes are laid one by one. At present, the primitive method of connecting is generally adopted. The artificial plumbing work in such a groove causes discomfort to the worker and causes heavy labor.

Therefore, for example, Japanese Patent Application Laid-Open No. Hei 9-119126 discloses
A piping method using a piping device described in Japanese Patent Application Laid-Open Publication No. H10-209,004 is adopted. That is, in the piping method described in the publication, a plurality of pipes are bound at a predetermined interval, and the bound pipes are arranged on a frame provided in a digging groove so as to be movable in an axial direction, and provided on the frame. The new pipe is moved in the axial direction by the pushing of the pressing machine, and the pipe is connected by fitting the front end of the pipe into the rear end of the existing pipe.

[0005]

When a new pipe is inserted into an existing pipe, an appropriate pressing force is required because both pipes are hermetically sealed. Therefore, a reaction force (a force for pushing the frame in a direction opposite to the direction in which the pipe is pushed in) when the piping is pushed out by the pressing machine acts on the frame.

Therefore, in the above-mentioned conventional piping apparatus, a frame supporting a new pipe is engaged with a frame supporting the existing pipe. For this reason, each of the hoods must be provided with an engagement means, and there is a disadvantage that the size of the apparatus including the frame will be increased in the future.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to efficiently connect and connect even a large number of pipes, and to reduce the number of workers in an excavation groove. . Another object of the present invention is to achieve simplification and miniaturization of a piping device used for a method of connecting piping.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has been made as a method and an apparatus for connecting pipes. A method of connecting pipes in which the new pipes are moved and joined by moving means to the existing pipes already laid in the grooves, and when the new pipes are moved to the existing pipes, Another advantage is that a reaction force acting in the direction opposite to the moving direction of the new pipe is taken by the existing pipe by engaging the locking means with the existing pipe.

Here, the movement of the new pipe means that the new pipe is moved until it comes into contact with the existing pipe when the new pipe is separated from the existing pipe, and that the new pipe is fitted to the existing pipe. Say.

Further, after the new pipe is set on the table on the ground, the pipe is hung while being held by the pipe apparatus, is carried into the groove, and is further added to the existing pipe already laid in the groove. Is connected by a moving means provided in the piping device, and when the new piping is pushed into the existing piping, the locking means provided in the piping device is pushed in the pushing direction of the new piping. And the existing pipe is engaged from the opposite direction.

[0011] Further, the piping device is characterized by holding means for detachably holding a new pipe set on a table on the ground on a device body which can be hung, and the new pipe carried into the groove. In a piping device provided with a moving means for pushing in the new pipe so as to be connected to the existing pipe already laid in the groove, the device main body includes a new pipe when the new pipe is pushed into the existing pipe. Is provided with locking means for engaging with the existing pipe from the direction opposite to the pushing direction of the pipe.

Further, it is preferable that the apparatus main body can hold a plurality of newly installed pipes, and that a moving means is provided for each of the pipes.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a description will be given of a piping device used in the piping connection method of the present invention. 1 and 2, reference numeral 2 denotes a frame body as an apparatus main body, which includes a pair of gate-shaped support frames 3a and 3b and both support frames 3a and 3b.
a, 3b a pair of left and right connecting frames 5a, 5b
And a rectangular mounting plate 7 connected to the rear ends of the connection frames 5a and 5b.

On the upper rod portion 12 of each of the support frames 3a and 3b, a connecting portion 6 to which a wire 42 is connected is protruded upward so that the frame body 1 can be lifted by a crane 43. Further, the upper rod portion 12 is provided with a plurality of inverted T-shaped holding means 13 for lifting and holding a pipe 15 having a predetermined length. In the present embodiment,
In order that the frame body 1 can hold the three pipes 15 in parallel, the holding means 13 includes the support frames 3a, 3
b. Each holding means 13
It comprises a vertical axis 13a rotatably supported by the upper rod section 12, and a holding section 13b provided horizontally at the lower end of the vertical axis 13a.

The pipe 15 is, for example, a reinforced plastic pipe (FRP pipe), and is a cable protection pipe that collectively accommodates transmission lines, telephone cables, and the like.

The upper rod portion 12 is provided with holding means rotating devices 16 for rotating each holding means 13 about its longitudinal axis 13a. Therefore, the holding means rotating device 16 allows the holding means 13 to be rotatable between a release position where the holding portion 13b is along the pipe 15 and a lifting position (a position orthogonal to the pipe 15) where the holding section 13b rotates approximately 90 ° from the release position. Has become. The holding means rotating device 16 operates manually or automatically.

The connection frames 5a and 5b and the mounting plate 7
, A pair of left and right operation rods 9 are slidably inserted respectively. At the tip of each operating rod 9, a locking means 1
1 are provided. Each locking means 11 removably engages with a connecting portion 10 provided at one end of a pipe (existing pipe) 15a already laid in a digging groove 40 formed by digging the ground. Three pipes 15 to be installed
Are provided corresponding to the two pipes 15 on both sides.

The locking means 11 comprises a U-shaped frame 18 and a pair of locking portions 19 protruding forward from the frame 18 as shown in FIGS. Stopper pieces 17 are provided inward on the upper edges of both locking portions 19, and the connecting portions 1 having a diameter larger than that of the existing pipe 15 a are further provided.
Claws 20 are respectively provided at the tips of the locking portions 19 so as to engage with the back surface of the hook 0.

One of the frames 18 of the locking means 11 is pivotally connected to the operating rod 9 via pins 22 so as to be vertically rotatable. The operating rod 9 is connected to a locking means adjusting jack (locking means operating device) 23 attached to the rear surface of the mounting plate 7, and the operating rod 9 is axially moved by the locking means operating device 23. It is possible to move and move the locking means 11 back and forth. As the locking means operating device 23, a known means such as a cylinder device can be appropriately used. Alternatively, the operator can manually operate the operation rod 9 without providing the locking means operating device 23.

Reference numeral 25 denotes a wire such as a wire or a rod for rotating the locking means 11, one end of which is a frame 18;
And the other end is protruded rearward from the mounting plate 7 so that an operator can pull or push out. Further, the cable 25 is connected to the locking means actuator 2
3, the locking means 11 can be rotated by the locking means operating device 23.

Reference numeral 27 denotes a pipe joint moving means for moving the pipe 15 forward, and three sets are provided on the front surface of the mounting body 7 in correspondence with the pipe 15. That is, as the moving means 27, for example, as shown in FIG. A pad 30 is provided, and in order to move the pressing pad 30, a manual hydraulic pump (FIG. (A)) 31 or an electric hydraulic pump (FIG. (B)) 31 is mounted on the cylinder 28.
a is connected.

As the electric moving means 27, FIG.
As shown in (c), there is an electric mechanism that moves the rod 33 out and back by a combination of a speed reducer 35 having a rod 33 to which the pressing pad 30 is attached and an electric motor 36.

As shown in FIG. 1 or FIG. 2, a storage box 38 is provided on the connecting frames 5a and 5b. The storage box 38 has a battery, an electric hydraulic pump, the locking means operating device 23 and a moving unit. A control unit for controlling a driving unit such as the means 27 is housed.

Reference numeral 39 denotes a roller for easily guiding the pipe 15 pushed by the moving means 27.
So that the supporting frames 3a, 3b
Attached to.

Next, a method of laying a pipe using the above-mentioned pipe apparatus 1 will be described. The pipes laid in the excavation groove 40 are, for example, a case of a plurality of rows of three rows and eight rows and a plurality of rows. In addition, in order to clarify the difference from the existing pipe 15a, the pipe 15 not yet joined is referred to as a new pipe for convenience.

First, on the ground of the work site, one worker A
However, the three new pipes 15 are placed and set on the table 41 so as to have a predetermined interval from each other. Further, the worker B operates the handle 43a of the crane 43, and another worker C operates the cable 43b of the crane 43, so that the pipe 15 is set on the table 41 after the pipe device 1 is lifted. Guide upward.

Further, the piping device 1 is lowered by the crane 43. Since each holding means 13 is at the release position, its holding portion 13b passes between adjacent new pipes 15. After the holder 13b has passed between the pipes 15, the worker A operates the holder rotating device 16 to rotate the holder 13 to the lifting position (see FIG. 3).

When the crane 43 is operated to lift the piping apparatus 1, the holding means 13 engages with each new pipe 15 from below, so that the three pipes 15 are lifted together with the piping apparatus 1.

Further, the piping device 1 for holding the newly installed piping 15
Is lowered into the excavation groove 40 and carried. One worker D in the excavation groove 40 installs the pipe pillow 45 on the bottom surface of the groove 40 in advance when joining the first-stage new pipe 15. If the first pipe 15 or more is already joined to the existing pipe 15a, the pipe pillow 45a is engaged with the pipe 15 from above.

The worker D is located at the rear of the piping device 1 suspended by the crane 43, and when the first-stage piping 15 is joined, the worker D
Is positioned above the first-stage pipe 15 (see FIG. 5A). Then, each newly installed pipe 15 held in the piping apparatus 1
Is engaged with the concave portion 46 of the piping pillow 45. As a result, the spacing between the pipes 15 and the height thereof are determined, but the existing pipes 15a and the new pipes 15 placed on the pipe pillows 45 may have a slight gap.

Next, when the locking means operating device 23 is operated in a state where the locking means 11 is kept rotating at the upper position, the rod 9 moves forward because the rod 9 moves forward (FIG. 5). (B)). At this time, since the locking means 11 passes between the upper and lower sides of the existing pipe 15a, there is no hindrance. The claw 20 of the locking means 11 is
After passing through the connecting portion 10a, the locking means 11 is rotated downward (see FIGS. 6A and 7A). The downward rotation of the locking means 11 is performed by an elastic body such as a spring (not shown), or by manually or automatically pushing the rod 25 when the cable 25 is a rod.

The downward rotation of the locking means 11 causes the stopper piece 17 to come into contact with the peripheral surface of the connecting portion 10 of the existing pipe 15a from above, thereby restricting the downward rotation of the locking means 11. (See FIG. 8). When the claw portion 20 of the locking means 11 is separated from the back surface of the connecting portion 10 and the locking means 11 is retracted by the locking means operating device 23, the claw portion 20 is moved to the back surface of the connecting portion 10. (See FIG. 7).
(B)).

As described above, when the locking means 11 is engaged with the connecting portion 10, the locking means 11 can be individually moved and adjusted. Therefore, as shown in FIG. Even if the position of the portion 10 is different in the longitudinal direction of the existing pipe 15a, the connecting portion 10
Can be securely locked without rattling.

Next, when the worker D operates each moving means 27 to advance each pressing pad 30 individually, the pressing pad 30 pushes each pipe 15 forward to move it. Since the stopping means 11 is engaged with the existing pipe 15a from the direction opposite to the pushing direction of each pipe 15,
The piping device 1 provided with the moving means 27 does not escape in the direction opposite to the direction in which the piping 15 is pushed in.
Is securely fitted into the connecting portion 10 of the existing pipe 15a (see FIG. 6B, FIG. 7C and FIG. 9B).

In order to ensure that the pipe 15 is fitted into the connection portion 10 more preferably, for example, the distal end side of the pipe 15 and / or the opening side of the connection portion 10 are formed in a tapered shape.
Moreover, it is preferable to apply a lubricant to the sliding surface of the new pipe 15 so that the new pipe 15 can be moved smoothly. Since a seal member (not shown) is appropriately provided on the inner peripheral surface of the connection portion 10, the seal between the connection portion 10 and the pipe 15 is ensured.

When the connection between the existing pipe 15a and the new pipe 15 is completed, each locking means 11 is rotated upward to a predetermined angle and then retracted. Moreover, the holding device rotating device 1
After rotating 6 to the release position, the crane 43 lifts the piping device 1 upward.

At this time, since the holding means rotating device 16 passes between the joined pipes 15, the piping apparatus 1 is separated from the joined pipes 15 without any trouble. Then, the piping device 1 discharged from the excavation groove 40 sequentially holds the newly installed piping 15 set on the ground, and joins the pipes in the same manner as described above. When the piping work is completed, the excavation groove 40 is appropriately filled back, and the pipe 15 is buried.

In the piping apparatus 1, a plurality (three) of newly installed pipes can be automatically connected to the existing pipe 15a at the same time, so that work efficiency can be improved. In the above embodiment, in addition to moving the new pipe 15 while completely placing it on the pipe pillow 45a, the new pipe 15 is held by the pipe apparatus 1 in a suspended state.
The new pipe 15 may be placed on the pipe pillow 45a after the tip of the pipe 5 is slightly fitted into the mouth of the connection portion 10 of the existing pipe 15a.

A roller is provided in the holding portion 13b of each holding means 13, and the new pipe 15 is moved while the new pipe 15 is supported by the holding means 13 and the pipe pillow 45a via the roller. If that is the case,
Further, the new pipe 15 can be easily moved.

The present invention is not limited to the above embodiment, and the piping device 1 may hold a plurality of (two in this embodiment) newly installed pipes 15. That is, as shown in FIG. 11, the piping device 1 has a configuration in which the locking means 11, the operating rod 9, the locking means operating device 23, the moving means 27, and the like are provided vertically in two stages.

Further, the lower ends of the front and rear support frames 3a and 3b are connected by a connecting rod 47 and reinforced. The piping pillow 4 is provided on both sides of the support frames 3a and 3b.
Pipe pillow joint guides 48 whose inner surfaces are open in the vertical direction are provided so that both ends of 5a are fitted.

Next, when laying pipes using the piping apparatus 1, first, a new pipe 15 is previously set on the ground.
Is set on the table 41 in the same manner as described above.
As shown in (1), three new pipes 15 of the first stage are placed on the table 41. Further, a pipe pillow 45a is placed before and after the pipe 15, and three new pipes 15 of the second stage are placed on the pipe pillow 45a.

Further, the six new pipes 15 are collectively lifted by the pipe apparatus 1, and the holding means 13 holds the first-stage pipes 15. At this time, since the both ends of the pipe pillow 45a are fitted in the pipe pillow joining guide 48, the six new pipes 15 can be held securely and safely. Then, the piping apparatus 1 holding the two-stage pipes 15 is carried into the excavation groove 40 and the installed pipe pillows 45 are installed.
The new pipe 15 of the first stage is placed on b.

Since the already installed pipe pillow 45b is fitted into the lower part of the pipe pillow joining guide 48, the joining of the pipe pillows is completed.

Further, as described in the above embodiment,
The new pipes 15 are respectively joined while the locking means 11 are engaged with the existing pipes 15a. In this embodiment, the multi-row and multi-stage new pipes 15 are simultaneously connected to the existing pipes 15a. This makes it possible to improve work efficiency.

The present invention is not limited to the above-described embodiment. For example, in the piping device 1, the hanging part of the pipe and the joint between the existing pipe and the new pipe are separate bodies. In such a case, the joint provided with the locking means may move the new pipe to the existing pipe by operating a manual handle as the moving means.

Further, the movement of the new pipe 15 is not necessarily limited to the case where the rear surface is pushed out, but the case where the hanging part of the pipe and the joint between the existing pipe and the new pipe are separate bodies as described above. It is also possible to provide a joint having a handle at the front of the new pipe, and operate the handle to pull the new pipe 15 so as to be fitted to the joint 10.

Further, the engaged portion to be engaged by the locking means 11 of the existing pipe 15a is not limited to the back surface of the joint 10 but the existing pipe 15a including the joint 10
Alternatively, the locking means 11 may be removably fixed to the existing pipe 15a side by a fastener, even if it is an uneven portion provided separately.

Further, the number of the pipes 15 held in the apparatus main body 2 is not limited to the above embodiment, but may be a single row or a plurality of rows other than three rows, and may be three or more rows. There may be.

[0050]

As described above, according to the pipe connecting method of the present invention, when the new pipe is moved to the existing pipe by the moving means, the locking means is engaged with the existing pipe to move the new pipe. The reaction force acting in the direction opposite to the direction is taken by the existing pipe, so it has a simpler structure than the conventional means that the frame supporting the new pipe is engaged with the frame that supports the existing pipe. The new pipe can be prevented from escaping, large equipment is not required, and even with a large number of pipes, the work space in the groove can be effectively used to perform the pipe work efficiently. Can be reduced.

Further, the piping device of the present invention comprises a holding means capable of detachably holding a new pipe set on a table on the ground, and a new pipe carried into the groove in a device body which can be suspended. In order to connect to the existing piping already laid in the groove,
A moving means for pushing the new pipe is provided, and the device main body is provided with a locking means for engaging the existing pipe in a direction opposite to the pushing direction of the new pipe when pushing the new pipe into the existing pipe. This makes it possible to automate particularly heavy labor in the laying of a series of pipes, so that multiple workers enter the trench and connect the pipes one by one. The number of workers in the groove can be reduced (for example, one person can be used), and the above method can be easily performed.

Further, when the apparatus main body can hold a plurality of newly installed pipes, and when moving means are provided for each pipe, the apparatus main body carries the plurality of pipes into the groove. The pipes can be respectively piped at the same time, and there is an advantage that a multi-row and multi-stage pipe work can be efficiently performed.

[Brief description of the drawings]

FIG. 1 is an overall schematic view showing a pipe laying operation.

FIG. 2 is a perspective view showing an embodiment of the piping device of the present invention.

FIG. 3 is a cross-sectional front view of a state in which the piping set on the table is held by a piping device.

FIG. 4 is a sectional front view of placing a pipe on a pipe pillow in a digging trench.

FIG. 5A is a side view showing a state immediately before a new pipe is placed on a pipe pillow, and FIG. 5B is a side view showing a state in which a locking means is advanced.

6A is a side view showing a state immediately before the locking means is locked to the new pipe, and FIG. 6B is a side view showing a state where the locking means is engaged to the new pipe.

FIG. 7A is a cross-sectional plan view immediately before engagement where the locking means is advanced, FIG. 7B is a cross-sectional plan view in which the locking means is retracted and engaged with a new pipe, and FIG. FIG. 3 is a cross-sectional plan view in which a new pipe is joined to a pipe.

FIG. 8 is a cross-sectional rear view in which a locking means is engaged with a joint of a new pipe.

9A is a perspective view of a locking means, and FIG. 9B is a perspective view of a state in which a new pipe is joined to an existing pipe.

FIGS. 10A and 10B show moving means for joining pipes, wherein FIG. 10A is a schematic diagram employing a manual pump, FIG. 10B is a schematic diagram employing an electric hydraulic pump, and FIG. 10C is a schematic diagram employing an electric mechanism. FIG.

FIG. 11 is a perspective view showing another embodiment of the piping device of the present invention.

FIG. 12 is a cross-sectional front view of a state where two-stage pipes are set on a table.

FIG. 13 is a cross-sectional front view of a state in which a pipe is carried into an excavation trench.

[Explanation of symbols]

 2 Frame body (apparatus main body) 11 Locking means 13 Holding means 15 Piping (new piping) 15a Existing piping 27 Moving means 40 Drilling groove (groove) 41 units

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Shozo Nakamura 3-3-22 Nakanoshima, Kita-ku, Osaka City Inside Kansai Electric Power Co., Inc. (72) Osamu Ohno 3-2-222 Nakanoshima, Kita-ku, Osaka City Kansai Electric Power Co., Inc. (72) Inventor Teruo Yamashita 3-2-2, Nakanoshima, Kita-ku, Osaka-shi Kansai Electric Power Co., Inc. (72) Inventor Mitsunori Inoue 3-2-2, Nakanoshima, Kita-ku, Osaka-Kansai Electric (72) Inventor Yoshiaki Murakami 2-9-1, Honjohigashi 2-chome, Kita-ku, Osaka-shi Kanden Kogyo Co., Ltd. (72) Inventor Shoji Mukakawa 2-9-1, Honjohigashi 2-chome, Kita-ku, Osaka Kanden (72) Inventor Hiroki Sueyoshi 75 Nojiri, Ritto-cho, Kurita-gun, Shiga Prefecture Inside Sekisui Chemical Co., Ltd. 72) Inventor Yoshihiro Matsuo 75, Nojiri, Ritto-cho, Kurita-gun, Shiga Prefecture Sekisui Chemical Co., Ltd.

Claims (4)

[Claims] 1. A method of connecting pipes in which a new pipe is suspended and carried into a groove, and the new pipe is moved by moving means and joined to an existing pipe already laid in the groove. When the new pipe is moved to the existing pipe, a reaction force acting in the direction opposite to the moving direction of the new pipe is taken by the existing pipe by engaging the locking means with the existing pipe. How to connect the piping. 2. After setting a new pipe on a table on the ground,
The pipe is hung in a state of being held by a piping apparatus, carried into the groove, and further joined to the existing pipe already laid in the groove by pushing the new pipe by moving means provided in the pipe apparatus. A pipe connecting method, wherein when the new pipe is pushed into the existing pipe, the locking means provided on the pipe apparatus is engaged with the existing pipe from a direction opposite to the pushing direction of the new pipe. A pipe connection method characterized by the above-mentioned. 3. A holding means capable of detachably holding a new pipe set on a table on the ground, and said new pipe carried into the groove is already laid in the groove in the apparatus body which can be hung. In a piping device provided with a moving means for pushing the new pipe in order to connect to the existing pipe, when pushing the new pipe into the existing pipe, the apparatus main body may have a direction opposite to the pushing direction of the new pipe. A piping device, wherein a locking means for engaging an existing pipe is provided. 4. The piping apparatus according to claim 3, wherein the apparatus main body can hold a plurality of newly installed pipes, and a moving means is provided for each of the pipes.