JP2619267B2 - Propulsion pipe lubrication material injection piping method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a propulsion method for laying a pipeline in the ground, and a small-diameter propulsion pipe that does not allow a person to enter the inside. The present invention relates to a method of piping while propelling, and more particularly to a method of propulsion piping for injecting a lubricating material around the entire propulsion pipe.

<Conventional technology> Conventionally, a propulsion method has been used to lay pipes in the ground with pipes such as fume pipes. Injecting around the pipe was effective. Therefore, as shown in FIGS. 9 (A) and 9 (B), when propelling a large-diameter pipe a into which a person of 600 mm or more can enter, a valve capable of injecting a lubricant can be used. d is inserted into a large-diameter pipe a, and the large-diameter pipe a is pierced with a lubrication-injection port c so as to be connected thereto. The pipes were installed in the lubricating material injection plant installed on the ground and inside the starting pile. Then, a method of supplying a lubricating material around a propulsion pipe composed of a large-diameter pipe a propelled by a propulsion method has been implemented.
On the other hand, in the method of propelling small-diameter pipes, for example, in which a person having a diameter of 500 mm or less cannot enter the interior, almost no lubricating material is injected.

<Problem to be Solved by the Invention> However, in the former method of inserting a lubricating material injection pipe into a large-diameter pipe, piping is performed by injecting a lubricating material from the inside of the propelling pipe being propelled. For this reason, there is a problem in that the pipes and the like often hinder the sediment removal. In addition, there is a problem that it is difficult to change the injection position of the lubricant in the middle. Further, in the latter method, since the lubricating material is supplied around the propulsion pipe only in the vicinity of the starting pile, it is impossible to supply the lubricating material to the tip of the propulsion pipe, that is, in the vicinity of the leading conductor. For the purpose of smooth propulsion and extending the propulsion distance, there are problems such as little effect.

<Means for Solving the Problems> The gist of the present invention is to provide (1) a lubrication injection pipe connected to a lubrication injection pump in a method of propelling a small-diameter propulsion pipe while injecting lubrication. Along the outer peripheral surface of the propulsion pipe, the tip of the pipe is connected and fixed to a leading conductor attached to the head of the propulsion pipe via a towing lot, and a sliding material is supplied from the tip of the injection pipe. A lubricating pipe injection method for a propulsion pipe, wherein the propulsion pipe is propelled while being injected around a head of the propulsion pipe.

(2) Another lubricant injection pipe is provided along the outer peripheral surface of the propulsion pipe in parallel with the first lubricant injection pipe connected and fixed to the leading conductor, and the aforementioned lubricant injection pipe is provided in the middle of the first lubricant injection pipe. 2. A method for injecting a lubricating material into a propulsion pipe according to claim 1, wherein a tip of another lubricating material injecting pipe is provided.

(3) The method according to claim (1), wherein a tip portion of the towing lot is embedded in a leading conductor.

<Operation> As described above, according to the present invention, the lubricating material injection pipe connected to the lubricating material injection pump is piped to the outside of the propulsion pipe, and the leading end is connected and fixed to the outer peripheral surface of the leading conductor via the towing lot. Since the lubricating material is injected from the distal end of the lubricating material injection pipe, the lubricating material can be sufficiently supplied also to the distal end of the small-diameter pipe propelling pipe located at the head, thereby enabling the propelling pipe to be supplied. Can be smoothly and efficiently propelled, and the propulsion distance can be significantly extended.

Another lubricant injection pipe is provided in parallel with the first lubricant injection pipe fixedly connected to the outer peripheral surface of the leading conductor, and the tip of the other lubricant injection pipe is inserted in the middle of the first lubricant injection pipe. When it is provided, the lubricant can be supplied not only to the leading propulsion pipe but also to other propulsion pipes following the leading propulsion pipe.

<Embodiment> One embodiment of the piping method according to the present invention will be described in detail with reference to the drawings. In FIGS. 1 to 7, reference numeral 1 denotes a plurality of fume pipe workers, each of which is sequentially piped. A small-diameter propulsion pipe that cannot enter the inside thereof, and a leading conductor 2 is attached to the tip of the propulsion pipe 1 at the head thereof. At the bottom of the outer periphery of the leading conductor 2, there is provided a mounting bracket 4 for mounting and fixing the tip of the traction lot 3. The tip and the end of the towing lot 3 are spherical ends 3a, respectively, and the spherical end of the tip is
Reference numeral 3a is configured so as to be fitted into a ball joint 4a formed in the mounting bracket 4. Reference numeral 5 denotes a main push jack capable of pressing the propulsion tubes 1 arranged at the rear end.

Next, reference numeral 6 denotes a lubricating material injection pipe which is piped along the outer periphery of the propulsion pipe 1. An ejection fitting 8 is attached to the tip of the propulsion pipe 8 so that the lubrication material 7 can be discharged from the side spout 8a so that the lubrication material can be supplied around the propulsion pipe 1 in the propulsion pipe. . The spout fitting 8 is also provided with a ball joint 8b similarly to the mounting fitting 4, so that the ball end 3a at the end of the towing lot 3 can be fitted.

When the traction lot 3 is fitted to these ball joints 4a and 8b, the traction lot 3 is configured such that no bending stress is generated when the propulsion pipe 1 or the leading conductor 2 is propelled. Therefore, the lubricating material injection pipe 6 arranged around the leading propulsion pipe 1 has an ejection fitting 8 attached to the tip thereof, and is connected to the leading conductor 2 via the ejection fitting 8 and the traction lot 3. It is configured to be pulled by the leading conductor 2.

A three-way valve 10 and a lubricant injection pump 11 installed on the ground are connected to the end of the lubricant injection pipe 6 via a rubber hose 9 to supply the lubricant 7 to the tip of the lubricant injection pipe 6. Is configured to obtain. Reference numeral 12 denotes a joint fitting for connecting the lubricant injection pipes 6 to each other. There are two types of joints, one-piece joints and two-piece joints.
Is used, two joints are used.

The second lubricant injection pipe 13 is arranged in parallel with the first lubricant injection pipe 6 for the purpose of supplying the lubricant 7 to the middle of a large number of propulsion pipes 1 connected in series. At the tip, an ejection fitting 14 is attached. The number of the second lubricating material injection pipes 13 is further increased, and it is also possible to pipe the third and fourth lubrication pipes.

The lubricating material injection pipes 6 and 13 in the above embodiment are made of a carbon steel pipe for piping, have a length corresponding to the effective length of the propulsion pipe 1, and are sequentially connected to each other by a joint fitting 12 in a vertical pile. Further, the lubricating material injection pipes 6 and 13 can be provided at any of the upper, lower, left and right positions on the outer peripheral surface of the propulsion pipe 1 as necessary.
After the propulsion of the propulsion tube 1 is completed, the propulsion tube 1 can be easily pulled out by using a fitting using the grip of the joint fitting 12 and an electric winch.

In the above embodiment, the leading end of the towing lot 3 is protruded from the outer periphery of the leading conductor 2. However, as shown in FIGS. 8 (A) and 8 (B), in order not to increase the pressure resistance during propulsion. Alternatively, the leading end of the towing lot 3 may be curved and embedded inside the leading conductor 2.

<Effect of the Invention> As described above, in the piping method according to the present invention, the lubricating material injection pipe is piped along the outer circumference of the propulsion pipe, and the tip is connected and fixed to the leading conductor via a towing lot. Since the lubricating material is supplied from the section, the lubricating material can always be supplied around the propulsion pipe positioned at the head. Therefore, this makes it possible to reduce the frictional resistance between the propulsion pipe and the surrounding soil, reduce the axial load on the propulsion pipe and significantly extend the propulsion distance, and reduce the number of starting shafts and improve work efficiency. Expenses can be saved. At the same time, the safety when laying the propulsion pipe can be improved.

Further, since the method of the present invention does not provide a lubrication material injection pipe in the propulsion pipe, there is no danger of disturbing the removal of sediment, and the lubrication material can be injected by changing the injection position in a timely manner. In the case where it becomes impossible to perform the above-mentioned operation, the lubricating material can be smoothly supplied around the propulsion pipe even in the method of propelling a small-diameter propulsion pipe.

[Brief description of the drawings]

FIG. 1 and FIG. 2 are explanatory views showing examples of application of the method of the present invention, FIG. 3 to FIG.
(A) and (B) are explanatory diagrams of another example, and FIG. 9 is an explanatory diagram showing a conventional example. 1 is a propulsion pipe, 2 is a leading conductor, 3 is a traction lot, 4 is a mounting bracket, 4a and 8b are ball joints, 6 and 13 are lubricating pipes, 7 is a lubricating material, 8 is a pouring fitting, and 9 is A rubber hose, 10 is a three-way valve, 11 is a lubricant injection pump, 12 is a joint fitting, and 14 is an ejection fitting.

Claims (3)

(57) [Claims] 1. A method for propelling a small-diameter propulsion pipe while injecting a lubricating material, wherein a lubrication injection pipe connected to a lubrication injection pump is piped along an outer peripheral surface of the propulsion pipe. , The leading end of which is connected to and fixed to a leading conductor attached to the head of the propulsion tube via a towing lot, and the lubricating material is injected from the leading end of the injection tube around the head of the propulsion tube. A lubricating material injection piping method for a propulsion pipe, characterized in that the propulsion is performed. 2. A second lubrication pipe is connected along the outer peripheral surface of the propulsion pipe in parallel with the first lubrication pipe fixedly connected to the leading conductor. The tip of the other lubricating material injection pipe is disposed at the end.
The lubrication material injection piping method for a propulsion pipe as described in the above. 3. The method of claim 1, wherein the leading end of the towing lot is embedded in a leading conductor.