JPS6117100Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a connecting device 1 for small-diameter hume pipes, such as water and sewage pipes, which is buried underground by a propulsion method.

Conventionally, examples of this type of connection device include the one described in Publication of Utility Model Publication No. 14327-1983,
The method described in Publication No. 1015 is known, but in the former case, when burying a large-diameter fume pipe that an operator can insert into the pipe, a through hole is formed in a joint member that connects adjacent pipes to the inside of the pipe wall. The connection is made by tightening and fixing bolts from the outside of the pipe through the pipe.
Since bolts cannot be installed inside the pipe, it cannot be applied to propulsion of small diameter pipes, and although the latter prevents rotation (rolling) of the pipe, the complicated structure makes the propulsion work extremely troublesome. There is a drawback that it is. Therefore,
Currently, when small-diameter pipes are being buried by propulsion, it is unavoidable to do so without connecting adjacent pipes. However, if the pipe is propulsion buried without being connected in this way, there is a risk that the preceding pipe may rotate due to the lateral pressure of the ground during burial, and this may cause the pipe to deflect or meander. It was hot.

This invention eliminates the drawbacks of the conventional methods described above, and provides a pipe connection device that has a simple structure and enables accurate burying of small-diameter hume pipes in which workers cannot enter the pipe. The purpose is to provide.

This invention will be explained with reference to embodiments shown in the drawings.

In Figs. 1 and 2, reference numeral 1 denotes a small-diameter hume tube, and on the outer periphery of one end of this hume tube 1,
A T-shaped annular steel plate collar 3 having an annular wall 2 protruding toward the center is fixed to the intermediate inner surface of the hollow inner cylindrical outer wall, and a predetermined wall is provided on the outer surface of the annular wall 2 in the circumferential direction. A plurality of protrusions 4 (four in this embodiment) are provided at intervals. Further, an annular wall 6 is provided on the outer periphery of the other end where a small-diameter notch surface 5 is formed at a position one step lower than the surface into which the annular collar 3 is fitted.
An annular steel plate reinforcing body 7 having a protruding structure is fixed thereto, and the circumferentially outward surface of this annular wall 6 has a shape that can fit into the recess 8 formed between the protrusions, so that they are mutually connected. The same number of protrusions 9 as the protrusions 4 are provided on both sides of the recess 8 so that both ends thereof are engaged and cannot rotate in the circumferential direction when inserted and fitted facing each other. A recess 10 is formed between the protrusions 9. That is, the protrusion 4 of the annular collar 3
The recess 10 of the annular reinforcing body 7 and the protrusion 9 of the annular reinforcing body 7 are arranged so as to face each other with the recess 8 of the collar 3 so that they fit into each other when inserted.

Furthermore, a rubber packing 11 is fitted in advance to the outer periphery of the cutout surface 5 of the annular reinforcing body 7, so that when the pipe is connected, the outer periphery of the packing 11 is in a compressed state with the inner surface of the cylindrical outer wall of the collar 3. It is designed to maintain a water-stopping effect by keeping the water in contact with the water. Note that if this packing 11 is not used, it is not necessary to form the notch surface 5 on the outer periphery of the other end of the fume pipe 1. For example, as shown in FIG. At the same time, a protrusion 9 having the above-mentioned structure is provided on the protrusion 9, and the collar 3 is attached from above.
The connection may also be made by fitting the parts closely together.

The outer periphery of one end of the hume tube 1 and the annular steel collar 3 are fixed, and the outer periphery of the other end of the hume tube 1 and the annular steel reinforcement 7 are fixed by the steel collar 3 and the steel reinforcement. An anchor 13 protruding from the inner wall of the tube 7 is buried in the hume tube 1 to be firmly integrated.

Next, to explain the procedure for connecting this small-diameter hume pipe 1, first, one side of the cylindrical outer wall of the collar 3 is fixed to the outer periphery of one end of the hume pipe 1, and the cut is attached to the outer periphery of the other end. An annular reinforcing body 7 fitted with packing 11 is fixed to the outer periphery of the notch surface 5, and the protrusion 9 of this annular reinforcing body 7 is attached to the annular collar 3.
The concave portion 8 of the annular reinforcing body 7 and the protrusion 4 of the annular collar 3 are arranged to face the concave portion 10 of the annular reinforcing body 7, respectively. Subsequently, the outer periphery of the packing 11 of the annular reinforcing body 7 is press-fitted into the other side of the cylindrical outer wall of the annular collar 3, and the protrusion 9 is inserted and fitted into the recess 8 of the annular collar 3. At this time, the protrusion 4 of the annular collar 3
are simultaneously fitted into the recess 10 of the annular reinforcing body 7 and engaged with both ends 8, 10 of these protrusions 9, 4, thereby connecting the hume tube 1 without rotating it in the circumferential direction. In this way, the hume tubes 1 are successively connected to perform propulsion work.

In the above connection procedure, the case where the end face of the hume pipe 1 on the reinforcing body 7 side faces the end face of the hume pipe 1 on the collar 3 side and is inserted and fitted is explained, but it is also possible to insert and fit it in the opposite direction. Needless to say, it is also possible to make them match.

In another embodiment shown in FIG. 4, a recess 12 is formed in the circumferentially outward facing surface of the annular wall 6, into which the protrusion 4 previously provided on the annular wall 2 at one end fits. This constitutes the other end surface of the tube 1. The connection procedure is the same as described above, in which the protrusion 4 is fitted into the recess 12 and the hume tube 1 is connected without rotating in the circumferential direction.

This device is as described above, and the end of one hume tube and the opposite end of the other hume tube are fixed to the other hume tube by a plurality of protrusions provided on the annular wall of the collar. By inserting and fitting into the same number of recesses provided in the annular wall, a non-rotatable connection can be made, and accurate propulsion and burying can be performed without causing the deflection or meandering of the conduit as in the past. Since bolts and the like are not used for the connection, the number of parts is small, and installation and removal are easy, making it suitable for propulsion and burial of small-diameter hume pipes. In addition, the annular wall fixed to the collar and the other hume tube is firmly fixed to the hume tube using anchors, so it will not slide around the outer circumference of the hume tube after connection, and will fit into each other. The protrusions and recesses are provided on the outer surfaces of the annular walls of the collar and the other hume pipe, respectively, without protruding toward the center from the inner periphery of the hume pipe, so the protrusions and recesses can be left as they are after connection. They may be left in place, and their removal is unnecessary, and they do not create resistance to the flow of fluid flowing through the pipes, so solid matter in sewage, for example, can accumulate in these protrusions and recesses. There is no such worry at all. Moreover, since the structure is simple, it has excellent effects such as significantly increasing connection work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of an embodiment of the small-diameter fume tube of this invention, Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a diagram showing another example of the end face without using packing. FIG. 4 is a sectional view of a main part showing another embodiment. DESCRIPTION OF SYMBOLS 1... Hum tube, 2... Annular wall, 3... Annular collar, 4... Projection, 5... Notch surface, 6... Annular wall, 7... Annular reinforcement body, 8... Recessed part, 9 ... protrusion, 10 ... recess, 11 ... packing, 12 ...
...Recess, 13... Anchor.

Claims (1)

[Scope of utility model registration request] A T-shaped ring-shaped steel collar, which has an annular wall protruding toward the center from the intermediate inner surface of a hollow inner cylindrical outer wall, is fixed to the outer periphery of the end of one hume pipe via an anchor, and the collar of the other hume pipe is An annular wall made of a steel plate is fixed to an end face facing the annular wall via an anchor, and an outer surface of the annular wall of the collar in the circumferential direction,
A plurality of protrusions are provided at predetermined intervals without protruding toward the center from the inner periphery of the hume tube, and a plurality of protrusions are provided on the outer circumferential surface of the annular wall fixed to the other hume tube, facing the protrusions and facing the protrusions. Provided with the same number of recesses that engage with the protrusions without protruding toward the center from the inner periphery of the hume tube, the end of one hume tube and the opposite end of the other hume tube,
A connecting device for a small-diameter hume pipe for propulsion embedding, characterized in that the protrusion is inserted and fitted into a recess for connection.