JP2508875Y2 - Drainage device in the front conduit of pipe burying device - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is to connect a tip conduit to the tip of a buried pipe such as a water pipe, a gas pipe, and a cable pipe, and connect the buried pipe with the tip conduit to the ground The present invention relates to a drainage device in a leading conduit of a pipe burying device that pushes into a lateral hole while excavating the lateral hole.

(Prior Art) Conventionally, in this type of pipe burying device, water often accumulates due to water leakage from the connection part of the burial pipe, etc., and there is often an accident that the surveying instrument or control instrument in the leading conduit is submerged and becomes unusable. In particular, when excavating downhill, leaks were often concentrated in the pipe leading to the above accident.

As a preventive measure against such an accident, conventionally, a method has been adopted in which a drain hose with one end connected to the leading conduit is extended into the starting shaft and connected to a drain pump, and the pump is driven to drain the drain inside the leading conduit. It was

(Problems to be solved by the invention) However, in the above-mentioned conventional method, for each additional work of the buried pipe, a complicated work of adding a drainage hose and piping a newly added hose into the buried pipe is required, There was a drawback that the work efficiency was lowered.

 The purpose of this plan is to eliminate the drawbacks of the conventional method.

(Means for Solving the Problems) As a means for solving the above problems, the present invention is to insert a casing into an embedded pipe having a tip conduit connected to a tip thereof, and rotatably insert an auger screw into the casing. In a pipe embedding device that conveys excavated soil back through the casing while pushing the tip ground of the front conduit and pushes the buried pipe forward, pumps out water that has penetrated into the front conduit into the front conduit. A drainage device in a leading conduit in a pipe burying device is proposed, in which a pump is provided and a pipe for discharging water pumped out by the pump is connected to a drain hole formed in the peripheral wall of the casing from the pump. An embodiment of the present invention will be described below with reference to the drawings.

(Example) In FIG. 1, a pipe burying device (1) is provided in a pit (P).
Is installed, and the device (1) mounts a carriage (3) on a rail (2) laid on the bottom surface of the pit (P),
The front conduit (5 ') is attached to the receiving plate (4) at the front end of the carriage (3).
The rear end of the embedded pipe (5) connected to the tip is detachably supported, and the casing (6) is inserted into the embedded pipe (5) and the front conduit (5 ') and An auger screw (7) having an excavating head (8) at its tip is rotatably inserted into the inside of (6), whereby the inside of the casing (6) is used as an excavated earth and sand conveying path conveyed by the auger screw (7). The casing (6) is formed so that the rear end of the casing (6) is supported by the receiving tray (4) and is opened in the soil discharge chamber (S) behind the receiving tray (4), and the auger is also provided. The rotation is transmitted from the motor (9) to the rear end of the screw (7). (10) is a hydraulic cylinder for pushing, which is fixed to both left and right sides of the carriage (3).

The drainage device in the front conduit (5 ') has the following structure. In FIG. 2, the tip conduit (5 ') has a short cylindrical blade opening (12) at the tip of a hollow cylindrical main body (11) having the same outer diameter as the buried pipe (5). It is fitted so that it can swing freely, and is connected by a plurality of swing drive hydraulic cylinders (13) fixed to the tip of the main body (11), and at the bottom inside the hollow of the tip conduit main body (11), A water absorption pump (14) with an electric storage type electric motor housed in a waterproof case is installed, and the suction port of the suction pipe (15) is located near the bottom surface in the hollow and the pump (14).
The drain pipe (16) connected to the discharge port of the above is extended to the upper part inside the hollow of the main body (11), and its extended end is non-returned to the drain hole (17) formed on the upper surface of the casing (6). Valve (18)
And a float switch (19) as a water level detecting switch is attached to the lower part of the hollow inside of the main body (11), and the switch (19) is energized to the electric motor of the water absorption pump (14). Should be connected to a power supply circuit, and when the water that has entered the leading conduit body (11) reaches a dangerous water level and when drainage is completed, this is detected to open and close the power supply circuit,
The pump (14) is automatically driven and stopped.

Now, when the bogie (3) is moved forward by rotating the auger screw (7) and driving the pushing hydraulic cylinder (10), the rotating excavating head (8) excavates the tip ground and auger screws the excavated earth and sand. By (7), it conveys backward through the casing (6), and together with it, the front conduit (5 ') and the buried pipe (5) are pushed into the ground. During such excavation and pushing processes, water leaks from the connection part of the buried pipe, etc. in the front conduit (5 '), and when it reaches the dangerous water level, the float switch (19) detects it. Then, the power supply circuit is closed, whereby the water suction pump (14) is started to pump out the water in the front conduit (5 ') and discharge it through the drain pipe (16) into the casing (6) through the drain hole (17). The water discharged into the casing (6) is transferred rearward in the casing (6) together with the excavated soil by the auger screw (7), and is discharged from the rear end into the soil discharge chamber (S). When the water in the front conduit (5 ') is sufficiently pumped out, the float switch (19) detects it and opens the power supply circuit, and the water suction pump (14).
To stop.

Water absorption pump with electric motor in the above example (14)
Alternatively, a water absorption pump with an electric motor without a power storage device can be used. In that case, the power may be taken from the existing cable in the buried pipe, or a dedicated cable for the water absorption pump may be wired in the buried pipe. In the latter case, it is necessary to add the dedicated cable when adding the buried pipe, but the work is much easier than the work such as adding the drainage hose.

(Effect of the device) The drainage device in the front conduit in the pipe burying device of the present invention discharges the water that has infiltrated into the front conduit into the casing from the drain hole formed in the peripheral wall of the casing by the pump and the pipe, and the inside of the casing to the drainage channel. In addition, since the auger screw is used as the transfer means and discharges backward, the drainage means from the front conduit to the rear end of the buried pipe can be omitted, and accordingly, the addition of the buried pipe in the conventional method is performed. The complicated work of adding drainage means and piping can be eliminated, and the work efficiency can be improved.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a partially cutaway side view of the entire pipe burying device, and FIG. 2 is an enlarged vertical sectional view of a leading conduit portion. 1 ... Pipe burying device, 5 ... Buried pipe, 5 '... Front conduit, 6
…… Casing, 7 …… Auger screw, 14 …… Water absorption pump, 16 …… Drain pipe, 17 …… Drain hole.

Claims (1)

(57) [Scope of utility model registration request] 1. A casing is inserted into an embedded pipe having a tip conduit connected to a tip thereof, and an auger screw is rotatably inserted into the casing to excavate the tip ground of the tip conduit while excavating earth and sand in the casing. In a pipe burying device that conveys backward through the pipe and pushes the buried pipe forward, a pump for pumping out water infiltrated in the front conduit is provided in the front conduit, and water pumped out by the pump is discharged. A drainage device in a front conduit of a pipe burying device, wherein a power pipe is connected from the pump to a drain hole formed in the peripheral wall of the casing.