JPH0549895U - Small diameter tube propulsion device - Google Patents

Abstract

(57) [Summary] [Purpose] It is intended to be able to bury underground pipes from low-rigidity small-diameter pipes to high-rigidity small-diameter pipes. [Structure] In a small-diameter pipe propulsion device in which a small-diameter pipe 3 having a tip conduit 10 attached to its tip is propelled by a propulsion device main body 1 installed in a starting shaft 2 to bury the small-diameter pipe 3 in the ground, The leading conduit 10 disperses the excavated earth and sand into the casing 11a of the screw conveyor 11 and the small-diameter pipe 3 to be buried, and transmits the propulsive force to the leading conduit 10.
Also, since the small-diameter pipe 3 is propelled and an excessive propulsive force does not act on the small-diameter pipe 3, it is possible to embed a small-diameter pipe 3 of high rigidity to a small-diameter pipe 3 of high rigidity.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a small-diameter pipe propulsion device for burying a small-diameter pipe in the ground.

[0002]

[Prior Art]

 As a conventional method for burying a small-diameter pipe in the ground, a propulsion device is embedded in a starting shaft, and a small-diameter pipe to be buried by this propulsion device is buried in the ground, or JP-B-59-45077. As in the device described in (1), a method of applying a propulsive force to the leading pipe attached to the tip of the small diameter pipe through the casing, and pulling it into the ground while pulling the small diameter pipe by the leading pipe, etc. Generally adopted.

[0003]

[Problems to be solved by the device]

 The former method of propelling a small-diameter pipe to be buried by a propulsion device has the effect of efficiently burying a small-diameter pipe when the small-diameter pipe has high rigidity like a Hume pipe, and is generally widely used. However, there is a problem that small diameter pipes cannot be embedded if they have low rigidity like vinyl chloride pipes. The latter method of burying a small-diameter pipe while towing it is suitable for burying a small-diameter pipe with low rigidity such as a vinyl chloride pipe, but the strength of the connection part such as a fume pipe or a ceramic pipe is low. There is a problem that cannot be applied to small diameter pipes. The present invention has been made in order to improve the above-mentioned conventional problems, and an object thereof is to provide a small-diameter pipe propulsion device which can be embedded from a small-rigid pipe having a low rigidity to a small-diameter pipe having a high rigidity. is there.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is directed to a small-diameter pipe propulsion device in which a small-diameter pipe with a tip conduit attached to the tip is propelled by a propulsion device body installed in a starting shaft to be buried in the ground. The pipe is distributed to the casing of the screw conveyor that discharges the excavated sand and the small diameter pipe to be buried, and the propulsive force is transmitted to the leading pipe to propel the leading pipe and the small diameter pipe.

[0005]

[Action]

 With the above configuration, since an excessive propulsive force does not act on the small diameter pipe, even a low-rigidity small diameter pipe can be buried in the ground without damage.

[0006]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings. In the figure, reference numeral 1 denotes a propulsion device main body installed in a launch shaft 2, and a pair of guide rods 4 are horizontally mounted on a base 1a in a propelling direction of a small-diameter pipe 3, and a propelling jack 5 is attached to these guide rods 4. Is supported so that it can move back and forth. The propulsion jacks 5 are connected to each other by a connecting plate 6, so that the propulsion jacks 5 move back and forth as a unit, and a casing pushing plate 7 is provided at the center of the front surface of the connecting plate 6 and adjustments are made on both sides thereof. A tube push plate 9 is attached via a cylinder 8.

In the figure, reference numeral 10 denotes a front conduit attached to the tip of the small-diameter pipe 3 to be buried, and the tip of the small-diameter pipe 3 is inserted into the opening at the rear end. Further, 11 is a screw conveyor for discharging the earth and sand excavated by a cutter head 11a provided at the tip of the leading conduit 10 to the starting shaft 2 side, and a casing 11a having the leading end coupled to the leading conduit 10 and inside the casing 11a. The screw 11b is housed and the tip of the screw 11b is connected to the cutter head 10a. The rear end of the casing 11a is in contact with a cylindrical casing pushing plate 7 attached to the front surface of the connecting plate 6, and the earth and sand transported inside the casing 11a are discharged through the inside of the pushing plate 7. At the same time, the rear end of the screw 11b penetrates the connecting plate 6 and is connected to a drive device 12 provided behind the connecting plate 6, and the drive device 12 rotates the cutter head 10a via the screw 11b. It has become so.

On the other hand, the rear end of the small-diameter pipe 3 is in contact with a pipe pushing plate 9 whose thrust is adjusted by an adjusting cylinder 8. The adjusting cylinder 8 is connected to a relief valve (not shown) whose relief pressure can be arbitrarily adjusted according to the rigidity of the small-diameter pipe 3 to be buried, so that a thrust force consistent with the rigidity of the small-diameter pipe 3 is constantly applied. It is designed to be added via the push plate 9. The pressure in the adjusting cylinder 8 is displayed as thrust on an operation panel (not shown) provided in the starting shaft 2.

Next, the operation will be described. When burying the small diameter pipe 3, the tip of the small diameter pipe 3 is inserted into the rear opening of the front conduit 10 attached to the tip of the screw conveyor 11. 4 (b), the rear end of the casing 11a of the screw conveyor 11 is brought into contact with the casing pushing plate 7 as shown in FIG. 4 (b). Next, as shown in (c) of FIG. 4, the adjusting cylinder 8 is extended to bring the pipe pushing plate 9 into contact with the rear end of the small-diameter pipe 3, and from this state, hydraulic pressure is supplied to the propulsion jack 5 to The tip 5 is pushed forward through the casing 11a by the casing pushing plate 7 through the casing pushing plate 7 to propel the tip 10 into the ground. At the same time, the small diameter pipe 3 is propelled into the ground via the pipe pushing plate 9 attached to the adjusting cylinder 8. Further, when a propulsive force acts on the small-diameter pipe 3 during propulsion, the relief valve connected to the adjusting cylinder 8 relieves and the excessive propulsive force is released, so that the small-diameter pipe 3 is prevented from being damaged by the excessive propulsive force. At the same time, the propulsive force acting on the adjusting cylinder 8 can be constantly monitored on the operation panel installed in the starting shaft 2.

On the other hand, when the propulsion for one small-diameter pipe is completed as described above, the propulsion jack 5 is retracted to connect the screw conveyor 11 and the next-promoting small-diameter pipe 3 in the starting shaft 2. The above operation is repeated until the leading conduit 10 reaches the reaching shaft, and even a small-diameter pipe 3 with low rigidity can be buried in the ground without applying excessive propulsive force to the small-diameter pipe 3. .. Further, since the tip of the small-diameter pipe 3 for propulsion is pressed against the leading conduit 10 by the pressure in the adjusting cylinder 8, it does not come off from the inside conduit 10 for propulsion, and the length of the small-diameter pipe 3 does not change. Or, even if there is an error in the length, it can be adjusted by the adjusting cylinder 8.

[0011]

[Effect of the device]

 As described in detail above, this invention distributes the propulsive force to the casing of the screw conveyor and the small-diameter pipe to transmit it to the front conduit, and to propel the small-diameter pipe into the ground while excavating with the front conduit. Therefore, even small-diameter pipes with low rigidity such as vinyl chloride pipes can be safely buried. In addition, since the traction force does not act on the connection part of small diameter pipes, small diameter pipes with small strength such as fume pipes and ceramic pipes can be buried safely and efficiently, and small Even if an excessive propulsive force is applied to the caliber pipe, the adjusting cylinder escapes this, so damage to the caliber pipe can be prevented. Moreover, by distributing the propulsion force to the casing and the small-diameter pipe, it is possible to apply a larger propulsion force to the leading pipe than that which was propelled only by the conventional casing, which improves the propulsion capability. It is also possible to bury it over a long distance.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of a small diameter pipe propulsion device according to an embodiment of the present invention.

FIG. 2 is a side view of a small diameter pipe propulsion device according to an embodiment of the present invention.

FIG. 3 is a partially cutaway plan view showing a main part of a small diameter pipe propulsion device according to an embodiment of the present invention.

4 (a) to (c) are explanatory views of the operation of a small-diameter pipe propulsion device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Propulsion device main body 2 Starter shaft 3 Small diameter pipe 8 Adjustment cylinder 9 Pipe pushing plate 10 Leading conduit 11 Screw conveyor 11a Casing

Claims (2)

[Scope of utility model registration request] 1. A small-diameter pipe propulsion device for burying a small-diameter pipe 3 in the ground by propelling a small-diameter pipe 3 having a tip conduit 10 attached to its tip by a propulsion device main body 1 installed in a starting shaft 2. In the first conduit 10, the tip conduit 10 disperses the excavated earth and sand into the casing 11a of the screw conveyor 11 and the small-diameter pipe 3 to be buried to transmit the propulsive force to the front conduit.
And a small-diameter pipe propulsion device for propelling the small-diameter pipe 3. 2. An adjusting cylinder 8 is provided between the pipe pushing plate 9 for propelling the small-diameter pipe 3 and the small-diameter pipe 3 so that the small-diameter pipe 3 is adjusted so that a propulsive force larger than the withstand load does not act on it. The small-diameter pipe propulsion device according to claim 1.