JPH03470Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pipe-propelled buried lead pipe, and more particularly, to a pipe-propelled buried lead pipe equipped with a directional control rod and rolling prevention means for accurately propelling the pipe between shafts.

Conventionally, when carrying out work to push and bury small and medium diameter pipes such as sewer pipes underground, the small diameter pipe was buried in a predetermined position in advance, and the medium diameter pipe was pushed and buried while pulling out the small diameter pipe. is being carried out.
This small diameter pipe is usually called a leading pipe, and the burying accuracy of this leading pipe directly affects the burying accuracy of the medium diameter pipe. Therefore, in many cases, a direction control device is built into the tip of the leading tube, but the structure of the leading tube tip becomes extremely complicated.
Moreover, it not only causes failure, but also has drawbacks such as the fact that there is no space for surveying within the tip tube due to the wiring of the driving source for operation and the like. Additionally, the leading pipe may roll during propulsion, making accurate burying difficult.

The present invention has been made with the aim of eliminating the above-mentioned drawbacks, and provides a pipe-propelled buried lead pipe that has a simple tip structure and can be operated within a shaft.

The following explanation will be given based on the drawings showing the embodiments of the present invention. Fig. 1 shows a simplified sectional view of the entire buried construction work, and 1 is a small-diameter leading pipe; The leading pipe 1 is buried between the starting shaft 2 and the reaching shaft 3, and is a medium-diameter pipe 4 made of hume, etc.
This serves as a guide for promoting burial.
To bury the medium diameter pipe 4, an excavation part 5 is connected to the rear end of the leading pipe 1, and a pressing device 6 for the medium diameter pipe 4, which is tightly fitted behind the excavation part 5, is installed in the starting shaft 2. The ground around the outer periphery of the leading pipe 1 is excavated by the excavation section 5, and the excavated soil is taken into the medium-diameter pipe while being pressed by a pressing device 6, so that the medium-diameter pipe 6 penetrates between the front and rear shafts 2 and 3. It is achieved by doing so. The earth and sand taken into the medium-diameter pipe 4 during the above-mentioned burying work flows from the tip of the leading pipe 1 that opens into the reaching shaft 3 from the muddy water tank 7 on the ground via the water pipe 8 into the leading pipe 1. Concentrated mud water is fed, and is sequentially discharged and conveyed to the starting shaft 2 side by the fluidity of the mud water, where the earth and sand are separated from the mud water, and the mud water is returned to the mud water tank 7 again.

The small-diameter leading pipe 1 according to the present invention consists of a propulsion head 9 and a trailing pipe 10, as shown in FIGS.
It is equipped with The movable part 11 has a cylindrical shape, and both end faces thereof are closed, and a rear end closing member 13
The outer surface is a concave spherical surface. The movable portion 11 is provided with at least three brackets 14, 14 extending in the axial direction on the outer circumferential surface thereof, and intermediate rods 15, 15 are rotatably pivoted at the rear of the brackets 14, 14, respectively. There is. Further, the fixed part 12 has a cylindrical shape with the same diameter as the movable part 11, and its front end side surface is closed with a closing member 16 having a convex spherical part that fits into the concave spherical part, and the convex spherical part, By fitting and opposing the concave spherical surface portion, a spherical seat is formed, and the movable portion 11 can rotate around the spherical seat. The outer diameter of this spherical seat portion is formed to be slightly smaller than the outer diameters of the movable portion 11 and the rotating portion 12, and an annular groove 1 is formed on the outer periphery of the opposing portion.
7 is formed, and the annular groove 17 is covered with a thin flexible short pipe 18 to prevent earth and sand from entering the ball seat surface.

A power supply section 19 and a target 20 are arranged inside the rear of the fixed section 12, and the rear of the target 20 is illuminated with a lamp 21. Further, sheath tubes 22, 22 are fixed in the axial direction on the outer circumferential surface of the rotating portion 12 at positions corresponding to the brackets 14, 14 of the movable portion 11, and inside thereof, the front and rear walls 23 of the sheath tube 22 are fixed. , 24, and is provided with a stopper 25 at its intermediate portion. A rod 26 is passed through the rod 26 while being elastically biased rearward by a coil spring 27. The front end of the rod 26 protruding forward from the sheath tube 22 is pivotally connected to the rear end of the front rod 15, and the elasticity of the spring 27 always pulls the rod 15 and the rod 26 rearward. When the movable part 11 is placed in the spherical seat, the fixed part 12
is being pressed. Reference numeral 28 denotes a rod 26 projecting further rearward from the rear end surface of the propulsion head 9 from the sheath tube 22.
This is a nut member fixed to the rear end of the.

On the other hand, as shown in FIG. 5, the trailing tube 10 includes a tube body 30 having the same diameter as the above-mentioned propulsion head 9, and is provided on the outer periphery of the tube body 30 in the same position as the sheath tube 22 in the axial direction. The succeeding sheath pipe 3
Screws 32 in opposite directions are carved on the outer periphery of both ends of 1, and sockets 33 can be screwed into the respective threaded portions. Further, an annular groove 34 is provided on both end edges of the trailing pipe 10, and an annular groove 34 is provided in the groove 34.
A ring 35 is fitted. A rod 37, which has approximately the same length as the succeeding sheath tube 31 and has male threaded portions 36, 36 at both ends, is fitted into the succeeding sheath tube 31, and one of the male threaded portions 36 is connected to the rod 37. A nut 38 is fixed with a female screw portion left on the outside.

Next, to explain the operation procedure, the following pipe 10 is brought into contact with the fixed part 12 side of the propulsion head 9, and first the sheath pipes 22, 22 on the outer periphery of the fixed part 12 and the succeeding sheath pipe on the outer periphery of the following pipe 10 are connected. 31, 31 are connected by sockets 33, 33, and the rear end surface of the fixing part 12 and the front end surface of the succeeding pipe 10 are brought into contact via the O-ring 35, and the sockets 33,
By tightening 33, both 12 and 10 are airtightly connected under pressure. Next, attach the male threaded part 36 of the rod 37 of the succeeding pipe 10 to the rod 2 on the fixed part 12 side.
The rod 37 is connected to the rod body 26 by screwing into the nut member 28 of No. 6, and the leading pipe 1 is propelled in this state. Then, as the propulsion progresses, the next succeeding pipe 10 is brought into contact with the rear end of the previous succeeding pipe 10, and successively connected by the sockets 33, 33. Propulsion is effected by pressing the rear end of the trailing pipe 10 by means of a pressing device 6 in the starting shaft 2. This propulsion work is carried out while sighting the target 20 with a measuring device installed in the starting shaft 2. However, if the center of movement of the leading pipe 1 deviates from the planned line during propulsion, the starting shaft 2
The sheath tubes 31, 31 on the outer periphery of each subsequent tube 10, 10
When one of the rods 37, 37 connected and extended through the rod 37, that is, the rod 37 located on the opposite side to the direction in which the leading pipe 1 is deviated, is pulled by an appropriate means, the pulling force is The force is transmitted to the front end movable part 11 of the leading pipe 1 through the body 26 and the rod 15, and the movable part 11 is displaced in the direction to be corrected around the spherical joint with the fixed part 12, and is subsequently pressed and propelled. The direction of movement is corrected by this.

The above-mentioned pulling device for the rod 37 is not particularly limited, and for example, as schematically shown in FIGS. The bolts 42, 42 are passed through the flanges 40, and the front ends of the bolts 42, 42 are connected to the connecting nuts 38, 38 of the rods 37, 37 of the succeeding pipe 10.
At the same time, nuts 43, 43 are screwed to the rear ends of the bolts 42, 42, and the nuts 43 are screwed together.
It may be a simple device in which the rod 37 is pulled by rotating the rod in the tightening direction.

In this way, the present invention includes a propulsion head 9 and a trailing pipe 10 that are propelled prior to propulsion and burial of the medium diameter pipe 4.
In the leading pipe 1, the propulsion head 9 is constituted by a fixed part 12 with a circular cross section and a movable part 11, and the fixed part 12 and the movable part 11 are spherically joined at their opposing surfaces. The trailing tube 10 can be closely connected to the fixed portion 12 side of the propulsion head 9, and a plurality of rods 26 and rods 37 extending toward the outer periphery of the movable portion 11 are provided on the outer peripheries of the fixed portion 12 and the trailing tube 10. The front end of the rod 26 is connected to the movable part 11 of the propulsion head 9.
Since it is pivotally connected to the rear end of a bracket 14 that projects from the outer peripheral surface of the head in the axial direction, if a deviation occurs in the propulsion direction of the propulsion head 9, the above-mentioned connection in the starting shaft 2 will be removed. By pulling the rear end of the rod 37 by an appropriate means, the tip movable part 11 of the propulsion head 9 can be displaced with the spherical seat as a reference point, and the deviated propulsion direction can be accurately and easily corrected. can. Furthermore, the structure is simpler than this type of conventional lead pipe, which not only helps reduce the occurrence of failures, but also eliminates the need for a drive unit for direction correction and eliminates the need for wiring, reducing construction costs. This is advantageous for surveying as it allows for a larger space and increases the effective cross-sectional area.

Furthermore, since the rods 26 and 37 for direction control are arranged on the outer periphery of the fixed part 12 and each subsequent pipe 10, the displacement angle of the movable part 11 from the spherical seat can be made large. Moreover, these rods 26 and rods 37 are installed in sheath tubes 22 and 31 which are provided on the outer peripheral surface of the fixed portion 12 and each subsequent tube 10 in the axial direction, respectively. Since it is inserted, the work of connecting the rod 37 to the rod body 26 and the rods 37, 37 are required.
The connection between the sheath tubes 22 and 31 can be easily carried out using the sheath tubes 22 and 31 as a guide, and since the connection between the succeeding tubes 10 and 10 is achieved by connecting the sheath tubes 31 and 31, the succeeding tubes 10 and 10 Connection work can be easily performed.

Further, as mentioned above, the bracket 14 is provided on the outer circumferential surface of the movable part 11 and protrudes in the axial direction.
The fixing part 12 is placed in the same direction as this bracket 14.
Since the sheath pipes 22 and 31 are provided on the outer peripheral surface of each trailing pipe 10, it is possible to reliably prevent the leading pipe from rolling due to the rotation of the excavator for burying the humid pipe, and to prevent the burying of the pipe body. Work can be done smoothly and accurately.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and
Fig. 1 is a schematic side view during construction, Fig. 2 is a sectional view of the propulsion head, Fig. 3 is a plan view showing how the rods are connected, and Fig. 4 is a sectional view taken along line A-A in Fig. 2. , FIG. 5 is a partially sectional side view of the succeeding tube, FIG. 6 is a side view illustrating the operating means of the rod, and FIG. 7 is an enlarged side view of the main part thereof. DESCRIPTION OF SYMBOLS 1...Leading pipe, 4...Medium diameter pipe, 9...Propulsion head, 10...Following pipe, 11...Movable part of propulsion head, 12...Fixed part, 26...Rod body, 37...
Rod.

Claims (1)

[Scope of utility model registration request] A leading pipe 1 consisting of a propulsion head 9 and a trailing pipe 10, which are propelled prior to propulsion and burial of a medium diameter pipe 4.
The propulsion head 9 is equipped with a movable part 11 having a circular cross section on which brackets 14 are protruded in the axial direction on at least three sides of the outer circumferential surface, and a sheath tube 22 is provided on the outer circumferential surface with a sheath tube 22 protruding in the direction of extension of each of the brackets 14. The fixed part 12 and the movable part 11 are spherically joined at their opposing surfaces, and each of the sheath tubes 22 is provided on the fixed part 12 side of the propulsion head 9. A sheath tube 31 that can be connected to the rear end is provided protruding in the axial direction from the outer peripheral surface so that the succeeding tube 10 can be tightly connected to the sheath tube 31. The body 26 and the rod 37 are inserted and connected, respectively, and the front end of the rod 26 is pivotally connected to the rear end of the bracket 14 of the movable part 11 directly or via an arbitrary intermediate rod 15. Pipe body propulsion buried lead pipe.