JPS62153486A - Pipe with longitudinal flange - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Field of Application The present invention is directed to a rod with a vertical flange suitable for application to a rod used for discharging earth and sand from the front of a ground excavation device such as a reverse circulation drill. Regarding pipes.

(b), conventional technology FIG. 6 is a perspective view showing the flange part of a conventional pipe; FIG. 7 is a diagram showing how a conventional drilling rod is used.

Conventionally, in this type of ground excavation device 1, an excavation bit is attached to the tip of a hollow rod 2, and excavated soil is discharged to the outside through the rod 2.

This hollow rod is usually used by connecting in series a pipe 5 of a predetermined length provided with a disk-shaped flange 5a at both ends, as shown in FIGS. 6 and 7. The rod 2 has a larger diameter at the flange 5a, which is the connecting portion. Further, as shown in FIG. 7, the rod 2 is usually used inserted into the pilot hole 6, and between the rod 2 and the pilot hole ground 6a, there is a
Mud water 7 is flowing downward in the figure.

(C) 0 Problems to be Solved by the Invention However, the problem is that the rock 6a of the pilot hole 6 is removed at the connecting part 2a of the rod 2.
Although the distance between the muddy water 7 and the rod 2 becomes narrower, and the flow velocity of the muddy water 7 increases, the direction of the flow is disturbed, causing the inconvenience that the ground 6a collapses. In addition, the size of the pipe 5 that can be used is determined by the size of the flange 5a,
It was not possible to use a pipe 5 with a diameter larger than a certain degree, and it was difficult to enhance the mud removal effect using a large diameter pipe 5.

Further, since the flange 5a is formed on a surface perpendicular to the directions of arrows A and B, which are the directions in which the rod 2 is pushed in or pulled out, the flange i? 5a got caught on the stand pipe 9, resulting in poor workability.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims to provide a vertically flanged pipe that has less risk of collapse of the ground at the rod connection part and allows the use of large-diameter pipes. It is.

(d) Means for solving the zero problem, that is, the present invention provides a plurality of vertical flanges (12a) at the end of the main body (12h) in the axial direction of the main body (12h). and is provided in a form extending outwardly from the vertical flange (12a), and is provided with a fastening sealing means (12f) capable of bringing the sealing surface into contact with a predetermined contact pressure,
The pipes (12) are configured to be connected to each other via the vertical flange (12a).

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings. The following r (el
The same applies to the column ``, action''.

(e) 0 effect With the above-described configuration, the present invention provides a vertical flange (12a)
By connecting the pipe (12) through the connecting part (2a) of the rod (2), the projected area within the pilot hole (6) is very small compared to the cross-sectional area of the pilot hole (6). The muddy water (7) between the ground (6a) and the rod (2)
) so as not to disturb the flow.

(f), Example Embodiments of the present invention will be described below based on the drawings.

Fig. 1 is a front view showing an embodiment of the vertical flanged pipe according to the present invention, Fig. 2 is a side view of Fig. 1, Fig. 3 is a plan view of Fig. 1, and Fig. 4 is a vertical flanged pipe according to the present invention. FIG. 5 is a partial front view showing an example of a ground excavation device using a flanged pipe, and FIG. 5 is a side view showing another embodiment of the present invention.

As shown in FIG. 4, the ground excavation device 1 has a rod 2, and a cutting machine (not shown) is attached to the lower part of the rod 2 in the figure. The rod 2 is supported in the ground 11 in a pilot hole 6 extending vertically in the figure so as to be movable in the directions of arrows A and B and rotatably driven in the directions of arrows C and D.

The rod 2 is constructed by connecting pipes 12 according to the present invention having a predetermined length in a continuous manner in the vertical direction in the figure, and each pipe 12 is connected as shown in FIGS. 1 to 3. As such, it has a cylindrical main body 12h. The main body 12
Both ends of h; here the vertical flanges 12a, 12a are 180°
At pitch, in the axial direction of the pipe 12 (vertical direction in Figure 1),
That is, the vertical flange 12a is provided in a shape extending outward from the 12th end face of the main body 12h in the connecting direction of the pipe 12, and the vertical flange 12a is formed into a trapezoidal plate shape as a whole, and the vertical flange 12a has a trapezoidal plate shape as a whole, and the vertical flange 12a is formed into a trapezoidal plate shape. In this case, inclined portions 12b, 12b are formed. As shown in FIG. 3, the vertical flanges 12a, 12a are such that their connection surfaces 12i are in contact with the line L1 passing through the center CT of the pipe 12, and the two vertical flanges 12a are They are provided in a staggered manner vertically in the figure. A circular seal groove 12c is bored in the end surface 12g of the pipe 12, and a seal ring 12d such as an O-ring is engaged with the seal groove 12c.

Further, as shown in FIG. 1, the vertical flange 12a has a positioning hole 12e formed in its center, and bolt holes 12f are formed above and below the positioning hole 12e. Note that, as shown in FIG. 2, this bolt hole 12f is formed so as to be inclined rightward in the figure by an angle θ.

Since the ground excavation device l has the above-described configuration, when the rod 2 has dug to a predetermined depth in the direction of arrow B in FIG. 4, a new pipe 12 is inserted above the rod 2 in the figure. Connect the rod 2 to extend the rod 2, and continue excavating in the B direction in this state. At this time, a new pipe 12 is connected to the pipe 12 at the top end of the rod 2, but
The connection between the two is made via the vertical flanges 12a, 12a of each pipe 12 to be connected, as shown in FIGS. 2 and 3. The connection between the vertical flanges 12a is through bolt holes 1
2f, 1.2f, but since the bolt hole 12f is inclined at an angle θ, the bolt hole 12f,
When a bolt is inserted into 12f and the two are fastened, a force is applied to each pipe 12.12 in the direction of bringing the end faces 12g and 12g into close contact (in the direction of arrow E), and the pipe 12.12 is secured to the rod by the seal ring 12d. The two are connected in such a way that the inside and outside are completely sealed. In addition, the vertical flanges 12a, 12a
C. As already mentioned, the connecting surface 12. Since the two vertical flanges 12a are arranged in such a way that they are in contact with each other, and the two vertical flanges 12a are offset vertically in the figure, the pipes 12 are connected to each other as shown in FIG. The connecting surfaces 12i of the twelve fir flanges 12a should be connected smoothly so that they touch each other on the line L1.

In this way, when the new pipe 12 is connected to the rod 2, excavation by the rod 2 is restarted, but the fastening part of the vertical flange 12a, which is the connecting part 2a of the rod 2, is The horizontal projected area is extremely reduced compared to the conventional disk-shaped flange 5a, and the pilot hole 6
The percentage of occlusion of the cross section is extremely low. This means that the flow of muddy water 7 passing between the pilot hole ground 6a and the rod 2 is less disturbed by the connecting portion 2a.

In addition, in the above-mentioned embodiment, the vertical flange 12a is connected to the main body 12h.
Although we have described the case in which two vertical flanges 12a are provided on each side, it goes without saying that the number of vertical flanges 12a to be installed may be any number from two to more.

Furthermore, the bolt holes 12f drilled in the vertical flange 12a are formed at an inclination angle θ as shown in FIG.
To provide a shape shifted by a distance L2 in the direction of arrow F1G, so that when the both vertical flanges 12a are fastened with bolts, the end surfaces 12g112g of the main body 12h come into contact with each other with a predetermined contact pressure, and a sealing effect can be exerted. It is also possible.

(g) 0 Effects of the Invention As described above, according to the present invention, the plurality of vertical flanges 12a are provided at the end of the main body 12h in the axial direction of the main body 12h outward with respect to the end surface 12g of the main body. A fastening sealing means such as a bolt hole 12f formed in an inclined or staggered shape is provided in an elongated shape, and the vertical flange 12a is capable of contacting a sealing surface such as an end face 12g with a predetermined contact pressure. The vibrator 1 is provided through the vertical flange 12a.
Since the rod 2 is constructed so as to be able to be connected to each other, the projected area of the connecting portion 2a of the rod 2 is significantly smaller than that using a conventional type flange 5a, as shown in FIG. The flow of muddy water 7 flowing between the rod 2 and the ground 6a is hardly disturbed, and the collapse of the ground 6a due to this can be prevented. Furthermore, since the vertical flange 12a hardly obstructs the flow of muddy water 7 within the pilot hole 6, a large-diameter pipe 12 is used so that the vertical flange 12a approaches the ground 6a of the pilot hole 6. However, unlike the conventional flange 5a, the pilot hole 6 will not be blocked even if the pilot hole 6
Even in this case, a pipe 12 with a large diameter can be used, and a high mud removal effect can be achieved.

Furthermore, if sloped parts 12b are formed at both ends of the fir flange 12a, when the rod 2 is moved in the directions A and B in FIG.
2, so the vertical flange 12a
There is no chance that the standpipe 09 will get caught, and good workability can be achieved.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the vertical flanged pipe according to the present invention, Fig. 2 is a side view of Fig. 1, Fig. 3 is a plan view of Fig. 1, and Fig. 4 is a vertical flanged pipe according to the present invention. FIG. 5 is a side view showing another embodiment of the present invention; FIG. 6 is a perspective view showing the flange portion of a conventional pipe; FIG. The figure shows how a conventional single-bend cutting rod is used. 12... Pipe 12a, Vertical flange 12f... Fastening sealing means (bolt hole) 12g...
... Seal surface (end surface) 12h ... Principal applicant Mitsui Construction Co., Ltd. Agent Patent attorney Phase 1) Shinji (and 1 other person) Figure 3, Figure 4, Figure 5

Claims (1)

[Scope of Claims] A pipe having a cylindrical body and having sealing surfaces at both ends of the body, wherein a plurality of vertical flanges are provided at the ends of the body on the end faces of the body in the axial direction of the body. The vertical flange is provided with a fastening sealing means that can bring the sealing surfaces into contact with a predetermined contact pressure, so that the pipes can be connected to each other via the vertical flange. A pipe with a vertical flange.