JP3179643B2 - Piping equipment for small diameter pipe propulsion machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping device for a small-diameter pipe propulsion machine which facilitates connection work of small-diameter pipes.

[0002]

2. Description of the Related Art Conventionally, in a small-diameter pipe propulsion device in which a small-diameter pipe is buried in the ground, a screw conveyor for carrying back the earth and sand excavated by a cutter head is divided for each unit length of the small-diameter pipe. The screw conveyor is connected when adding small diameter pipes.

[0003] In addition, pipes such as hoses and electric cables for supplying hydraulic pressure or air to a leading conduit mounted at the tip of the small-diameter pipe are also divided for each unit length of the small-diameter pipe. As shown, a joint b such as a quick coupler with a check valve is provided at an end of each pipe a, and after the screw d of the screw conveyor c and the casing e are connected, the pipes are connected by the joint b.

Further, after connecting the small-diameter pipe f, the pipes a on the starting shaft side are pulled out to the back side of the push plate g as shown in FIG. 2 and pulled so as not to cause slack in the small-diameter pipe f.
Connected to piping from control unit.

[0005]

However, since the pipes a are large in number, the method of manually connecting them each time a small-diameter pipe f is added requires a lot of work for connecting the small-diameter pipe f. There is a problem that the work efficiency is poor due to the need for man-hours.

Further, piping a drawn out to the back side of the push plate g
However, when using a laser transit to measure the position of the pipe ahead of the starting shaft, the position of the pipe cannot be measured due to the obstruction of the laser beam, or the slack is removed.
When the pipe was pulled, the pipes a were caught on the casing e, and were rubbed, resulting in early wear. SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a piping device for a small-diameter pipe propulsion device that facilitates a connection operation of a small-diameter pipe.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a small-diameter pipe having a leading conduit attached to a tip thereof.
The screw conveyor comprises a small-diameter pipe thruster which is propelled into the ground by a propulsion device installed in a starting shaft, and in which a cutter head provided at a tip of a leading pipe carries out excavated earth and sand by a screw conveyor. Is divided for each unit length of the small-diameter pipe, and both ends of the pipes laid along the outer peripheral surface of the casing are connected to joints that are automatically connected at the time of connection of the casing, respectively. A connecting block to which piping from the control unit is connected and which is connectable to the rear end of the casing by a driving means is provided.

[0008]

When the screw conveyor casing is connected by the above configuration, the pipes can be automatically connected by the joint, so that the connection of the small diameter pipe can be efficiently performed in a short time.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. FIG. 3 shows a small-diameter pipe propulsion machine. In this figure, 1 is a leading pipe attached to the tip of a small-diameter pipe 2 to be buried, 3 is a propulsion device installed in a starting shaft 4,
Reference numeral 5 denotes a screw conveyor for carrying out earth and sand excavated by a cutter head 1a provided at a front portion of the leading pipe 1 to the rear. The screw conveyor 5 includes a casing 5a and a screw 5b divided for each unit length of the small diameter pipe 2.

The casing 5a has a flange 5c at an end as shown in FIGS.
Among the pipes 6 laid along the outer peripheral surface of the pipe a, the pipe 6a through which hydraulic pressure and air pass passes through the flange 5c and is a joint 7 composed of a quick coupler with a check valve provided on the connection face 5d of the flange 5c. It is connected to the.

As shown in FIG. 4, the joint 7 is a male joint 7a.
And the female joint 7b, so that when the casing 5a is connected, it can be automatically connected.
The cable 6b laid along the outer peripheral surface of the casing 5a shown in FIG. 5 has a connector 8 at an end, and the cable 6b is connected by the connector 8.
In FIGS. 4 and 5, reference numeral 9 denotes a flange 5 of each casing 5a.
Fig. 4 shows a fixing tool for connecting between c.

On the other hand, the propulsion device 3 installed in the starting shaft 4
Is provided with a driving device 12 for rotating the screw 5b of the screw conveyor 5 and the cutter head 1a connected to the tip of the screw 5b.

A push plate 3a which is advanced by a propulsion cylinder 13 is provided in front of the driving device 12, and the small-diameter pipe 2 is propelled into the ground by the push plate 3a. As shown in FIG. 6, a through hole 3b through which the rear end of the casing 5a is inserted is opened. The rear end of the casing 5a inserted into the through hole 3b is connected to the connection member 14. The connection member 14 has the same joint as the joint 7 provided on the end face of the casing 5a, and is pressed by the connection cylinder 15 provided on the drive device 12 against the end face of the casing 5a. 7 is automatically connected.

Further, piping 17 from a control unit 16 is connected to the upper surface of the connecting member 14. By connecting the joint 7, the piping 17 and the piping 6 laid in the casing 5a are communicated. It has become so.

Next, the operation will be described. A small-diameter pipe 2 having a leading pipe 1 attached to the tip thereof is propelled into the ground by a propulsion device 3 in a starting shaft 4, and the soil excavated by the cutter head 1a is removed by a screw conveyor 5. Is carried out rearward. When the unit length of the small-diameter pipe 2 is completed, the push plate 3a is retracted, and the next small-diameter pipe 2 to be buried is carried in between the small-diameter pipe 2 already buried and the push plate 3a. It connects the screw 5b of the conveyor 5 and the casing 5a. When the casing 5a is connected, the piping 6 is automatically connected by the joint 7, so that the connection work of the piping 6 becomes unnecessary.

When the connection of the screw conveyor 6 is completed as described above, the push plate 3a is brought into contact with the rear end of the small-diameter tube 2 until the front end surface of the small-diameter tube 2 hits the rear end surface of the small-diameter tube already pushed in. After being advanced, the connection block 14 is advanced by the connection cylinder 15, and the push plate 3a connected to the rear end of the casing 5a is brought into contact with the rear end of the small diameter pipe 2 to start the propulsion of the small diameter pipe 2 again. Since the connection work of the piping 6 is not required when connecting the small-diameter pipe 2, the connection work of the small-diameter pipe 2 can be efficiently performed in a short time.

[0017]

As described above in detail, according to the present invention, when a screw conveyor is connected when a small-diameter pipe is added, pipes are automatically connected by a joint provided on an end face of the casing. There is no need to connect piping for work. With this, the connection work of the small diameter pipe can be performed efficiently in a short time, and the piping from the control unit and the piping inside the small diameter pipe are connected by the connection block. It is possible to eliminate problems such as that the pipes drawn out of the pipe hinder the position measurement of the leading pipe. Further, since it is not necessary to pull out the slack piping from the inside of the small-diameter pipe, the piping does not wear out early.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a conventional method of connecting pipes.

FIG. 2 is an explanatory diagram showing a conventional method of connecting pipes.

FIG. 3 is a configuration diagram of a small-diameter pipe thruster employing a piping device according to an embodiment of the present invention.

FIG. 4 is a side view of a piping device according to an embodiment of the present invention.

FIG. 5 is a perspective view of a piping device according to an embodiment of the present invention.

FIG. 6 is an enlarged view of a circle A in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lead pipe 1a Cutter head 2 Small diameter pipe 3 Propulsion device 4 Starting shaft 5 Screw conveyor 5a Casing 5b Screw 6 Pipings 7 Joint 15 Connection block 16 Control unit 17 Piping

Claims (1)

(57) [Claims] 1. A small-diameter pipe 2 having a tip conduit 1 mounted at a tip thereof.
A small-diameter pipe which is propelled into the ground by a propulsion device 3 installed in a starting shaft 4, and the excavated earth and sand excavated by a cutter head 1 a provided at the tip of a front pipe 1 is screwed out by a screw conveyor 5. In the propulsion device, the screw conveyor 5 is divided into unit lengths of the small-diameter pipe 2 and the pipes 6 laid along the outer peripheral surface of the casing 5a.
Are connected to the joint 7 which is automatically connected when the casing 5a is connected, the propulsion device 3 is connected to piping from the control unit 16, and is connected to the rear end of the casing 5a by driving means. A piping device for a small-diameter pipe propulsion machine provided with a flexible connection block 15.