JP2759015B2 - Couplings for traveling trucks in pipes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting joint for a pipe running carriage, and more particularly to a connecting joint for a pipe running truck used for inspecting and repairing pipes for plant piping, gas, water supply, etc. from inside the pipe. It is suitable when traveling in a pipeline including.

[0002]

2. Description of the Related Art Conventionally, when performing an in-pipe operation such as inspection and repair of an in-pipe, a plurality of in-pipe traveling carts traveling in the pipe axis direction are equipped with an inspection device and working equipment. 2. Description of the Related Art Conventionally, as a connecting joint for an in-pipe traveling bogie in a pipe portion having a bent portion such as a protruding portion or a cut-off portion, a universal joint mounted on a bogie unit 12 having a plurality of guide wheels 11 as shown in FIG. There is known a connecting joint of an in-pipe traveling bogie having a structure in which a universal joint 13 mounted on a bogie unit 12 adjacent to the bobbin 13 is connected by a connecting rod 14.

[0003]

When the curved pipe is run by the connection joint of the conventional in-pipe traveling bogie, since the connecting point is deviated from the pipeline center line 15, the traveling of the bogie unit 12 as shown in FIG. The angle θ between the direction A and the line of action B of the force for pulling the bogie unit 12 transmitted via the connecting rod 14 becomes large, and the tractive force cannot be efficiently transmitted to the bogie unit 12. In this conventional example, if the position of the universal joint 13 is moved to the pipeline center line 15 of the bogie unit 12, the angle between the traveling direction A of the bogie unit 12 and the line of action B of the traction force transmitted by the connecting rod 14 is formed. Can be smaller. However, by moving the position of the universal joint, the length of the bogie unit in the tube axis direction is limited, and there is a problem that the bogie unit cannot be enlarged.

An object of the present invention is to provide a connecting joint for an in-pipe traveling bogie that allows a tractive force to be efficiently transmitted even when passing through a curved pipe having a radius of curvature that is 1.5 times the pipe diameter and allows the bogie unit to be enlarged. It is the purpose.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a joint for connecting a plurality of bogie units in a pipe axis direction in a pipe line and connecting the bogie units of an in-pipe traveling bogie traveling in the pipe by a traction device. It is composed of an arc-shaped round bar fixed to the end of the bogie unit and a connecting rod having at both ends a round hole penetrated by the arc-shaped round bar, and the center axis of one of the round holes is the center axis of the other round hole. It is an orthogonal connection joint.

[0006]

According to the present invention, the round hole of the connecting rod is slightly larger than the diameter of the arc-shaped round bar, and the connecting rod is in a plane perpendicular to the center axis of the arc-shaped round bar with the axis of rotation of the arc-shaped round bar as the center of rotation. , And can move along the arcuate round bar in a state perpendicular to the center axis of the arcuate round bar.

The two round holes at both ends of the connecting rod are provided so that the center axes of the round holes are orthogonal to each other. The central axes are orthogonal to each other to accommodate the rotation of the truck.

If the radius of curvature of the arc-shaped round bar is small, it becomes a joint having the same function as the universal joint, and if it is large, the arc-shaped round bar comes into contact with the inner wall of the pipe when passing through a bent pipe, which hinders traveling. Therefore, the radius of curvature of the arc-shaped round bar must be maximized within a range where the arc-shaped round bar does not contact the inner wall of the tube when the bogie unit passes through the curved tube.

As shown in FIG. 2, when the bogie unit 2 to be pulled is present in the bent pipe, the round hole of the connecting rod 5 becomes an arcuate round rod as shown in FIG. 6 and travel direction A of the bogie unit 2
And the angle θ formed by the line of action B of the traction force transmitted by the connecting rod 5 is reduced, and the traction force can be efficiently transmitted to the bogie unit 2, so that the bogie unit 2 can smoothly pass through the curved pipe.

Further, since the arc-shaped round bars 4 and 6 of the adjacent bogie units 1 and 2 connected by the connecting bar 5 have their center axes always orthogonal to each other, when the bogie unit 2 passes through a curved pipe, the connecting bar 5 At least one of the two round holes 7 and 8 must always move along the arcuate round bar 4 or 6 and always smoothly pass even when the bogie unit 2 rotates and passes through a curved tube. Can be.

[0011]

FIG. 1 is a side view of an in-pipe traveling vehicle using a connecting joint according to the present invention. The bogie units 1 and 2 of the in-pipe traveling bogie have guide wheels 3 for moving in the pipe axis direction, and the bogie units are connected to each other through arcuate round bars 4 and 6 and connecting rods 5. The central axis of the front round hole 7 of the connecting rod 5 and the central axis of the rear round hole 8 are orthogonal to each other, and the circular hole 4 of the front bogie 1 and the circular round bar 6 of the rear bogie 2 pass through the round hole. The round holes 7, 8 of the connecting rod 5 can move along the arcuate round rods 4, 6.

[0012]

According to the present invention, the connecting rods having the round holes whose central axes are orthogonal to each other connect the circular arc-shaped rods fixed to the adjacent bogie units, so that even a curved pipe having a small radius of curvature can be used. In addition, the bogie unit that is long in the pipe axis direction can be smoothly passed, and the size of the bogie unit in the pipe axis direction can be increased.

[Brief description of the drawings]

FIG. 1 is a side view of a connection joint of a guide bogie according to the present invention.

FIG. 2 is a side view showing a curved pipe passing situation of the in-pipe traveling cart using the connection joint of the present invention.

FIG. 3 is a side view of a conventional in-pipe traveling cart using a universal joint.

FIG. 4 is a side view showing a situation in which a conventional in-pipe traveling truck passes a curved pipe.

[Explanation of symbols]

 Reference Signs List 1 front bogie unit 2 rear bogie unit 3 guide wheel 4 arc-shaped round bar of front bogie 5 connecting bar 6 arc-shaped round bar of rear bogie 7 front round hole 8 rear round hole 9 piping 11 guide wheel 12 bogie unit 13 universal joint 14 Connecting rod 15 Pipe center line

Continued on the front page (73) Patent holder 000004123 Nippon Kokan Co., Ltd. 1-2-1, Marunouchi, Chiyoda-ku, Tokyo (73) Patent holder 000002118 Sumitomo Metal Industries, Ltd. 4-33, Kitahama, Chuo-ku, Osaka-shi, Osaka No. (72) Inventor Yoshitaka Yano 5-9-1 Nishihashimoto, Sagamihara-shi Nippon Steel Corporation Steel Structure Marine Division (72) Inventor Takashi Kobori 5-56-1, Shiramyo-cho, Minami-ku, Yokohama-shi (72) Invention Michio Ozawa 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi Osaka Gas Co., Ltd. (72) Inventor Yasushi Yasushi 19-18 Sakuradacho, Atsuta-ku, Nagoya-shi Toho Gas Co., Ltd. (72) Inventor Takashi Kuroda Tokyo 1-1-2 Marunouchi, Chiyoda-ku Japan Steel Pipe Co., Ltd. (72) Inventor Shigetoshi Tsutsuno 4-5-33 Kitahama, Chuo-ku, Osaka City Sumitomo Metal Industries Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , (DB name) B62D 57/024 B60D 1/14 B61G 1/00

Claims (1)

(57) [Claims] A joint fixed to an end of the bogie unit in a joint for connecting a plurality of bogie units in a pipe axis direction in a pipeline and connecting the bogie units of an in-pipe traveling bogie traveling in a pipe by a traction device. An inner pipe comprising an arc-shaped round bar and a connecting rod having a round hole at both ends having a circular hole penetrated by the arc-shaped round bar, wherein the central axis of one round hole is orthogonal to the central axis of the other round hole. Coupling for traveling trolley.