JPH0220313Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pipe burying device for burying underground pipes such as Huyum pipes while promoting excavation.

To explain the outline of the pipe burying device, a pit is dug at the place where the pipe burying starts, and the main body of the burying device is installed in the pit. The main body of the device is movable in the direction of embedding the pipe, and rotates the removably attached auger and the cutter attached to the tip of the auger. The tip of the cutter and auger is surrounded by a cutter head, the outside diameter of which is equal to the outside diameter of the buried pipe, and the tip of the cutter head cuts around the hole to adjust the shape of the hole. The auger and trough pipe can be connected, and excavation is carried out by moving the main body of the apparatus while rotating the cutter through the auger. When the excavation length has advanced by the unit length of the buried pipe, the burying device body moves back by the unit length of the pipe, and the buried pipe is added, as well as the auger and trough pipe, and the above operations are repeated to bury the pipe.

However, if the ground to be excavated is a sand layer with a high water level (water-retaining sand layer), water and earth flow violently from the face, making it impossible for the face to stand on its own, and also causing ground subsidence, making it impossible to determine the direction of the cutter head.

Furthermore, a muddy water type can be considered as a pipe burying device in a water-retaining sand layer, but the muddy water type requires a large-scale muddy water treatment facility on the ground and has the disadvantage of requiring a large installation space.

In view of the above-mentioned conventional situation, this invention uses a water pump to pump water into the trough pipe, maintains the water pressure in the trough pipe at a level equal to or slightly higher than the water pressure applied to the cutter part, and divides the soil removal section into multiple rooms. By making it possible to discharge soil without opening the inside of the partition trough pipe to the outside air, it is possible to prevent water and sand from entering from the cutter, stabilize the face, prevent ground subsidence, and determine the direction of excavation. This is related to the pipe embedding equipment.

Embodiments of the present invention will be described below based on the drawings.

Fig. 1 is an overall explanatory diagram of the present invention, in which 1 is a cutter, 2 is a leading pipe with a direction correction function, 3 is an auger, 4 is a trough pipe, 5 is a hump pipe, 6 is a sheet pile, and 7 is a propulsion reaction force block. , 8 is a propulsion cylinder,
9 is an auger drive speed reducer, and 10 is an electric motor.
As shown in FIGS. 2 and 3, a water inlet 12 is provided at a predetermined position of the adapter pipe 11 of the propulsion reaction force block 7, and a water pipe 13 connected to a water pump (not shown) is connected to the water inlet. 12 so that water can be introduced into the trough pipe 4 which fits into the adapter auger 14.

A fixed partition plate 15 is fixed to the side opposite to the trough pipe 4 with respect to the water inlet 12 of the propulsion reaction force block 7, and about 1/4 of the total is fixed to the upper half side of the fixed partition plate 15.
A window 16 is provided by cutting out an area of the fixed partition plate 1.
A rotary partition plate 18 in the shape of a disk and without a window is attached to the shaft 17 that passes through the shaft 5 and rotates the auger 3 in the trough pipe 4.
A seal 20 is fitted on the outer periphery of the rotating partition plate 18 so that it can rotate in close contact with the inner periphery of the cylindrical frame 19 of the propulsion reaction force block 7. Furthermore, the respective partition plates 15 and 18 and the cylindrical frame 19
A rotary 2 equipped with a blade 22 that partitions the earth removal chamber 21 formed by the
3 is fitted onto the shaft 17, and a discharge port 24 is provided in the cylindrical frame 19 below the soil discharge chamber 21.
In the figure, 25 is a paddle that supports the pressure applied to the rotating partition plate 18, and 26 and 27 are oil seals that prevent earth and sand from going around.

Water is sent into the trough pipe 4 from the water inlet 12 via the water pipe 13 from a water pump (not shown),
The inside of the trough pipe 4 from the cutter 1 section to the propulsion reaction force block 7 is set to a predetermined water pressure, and the auger 3 and cutter 1 are driven by the electric motor 10 via the auger drive reduction gear 9. Here, the auger 3 and the cutter 1 may be driven by a mechanism that drives them integrally, or a mechanism that drives them separately.

By keeping the pressure in the trough pipe 4 substantially equal to or slightly higher than the water pressure in the water-retaining sand layer, water and sand in the water-retaining sand layer are prevented from flowing in from the cutter head portion more than necessary. Therefore, the face is stabilized, and the sand excavated by the rotation of the cutter 1 is taken in together with water, and the trough pipe 4
The auger 3 rotating inside transports it to the propulsion reaction force block 7 side.

The transported sand and water enter through a window 16 provided in the fixed partition plate 15 of the propulsion reaction force block 7 into a chamber partitioned by rotary 23 blades 22 in the soil removal chamber 21. Since the rotary partition plate 18 of the chamber has no window, the pressure inside the trough pipe 4 will not decrease even if the fixed partition plate 15 has a window.

Since the rotary 23 is rotated, the chamber filled with sand and water is rotated and discharged from the discharge port 24 provided below.
Sand and water fall and are discharged due to gravity. Sand and water enter the other empty rooms through the window 16, are rotated one after another, and are discharged. Here, the rotary 23 rotates while receiving the pressure of sand and water in the water-retaining sand layer and the pressure of the water sent into the trough pipe 4, but these pressures are supported by the paddles 25, and the rotary partition Sand and water leaking from the seal 20 on the outer periphery of the plate 18 are removed by oil seals 26 and 2 provided in two stages.
7, it is completely blocked.

In this way, by changing the pressure of water sent into the trough pipe according to the water pressure of the water retention sand layer,
It becomes possible to proceed with excavation while preventing the inflow of water and sand from the cutter head.

Note that the pipe burying device of the present invention is not limited to the above-mentioned embodiments, and other features include that the number of rotary blades rotatably installed in the earth removal chamber may be any number as long as it is three or more. Of course, various changes can be made without departing from the gist of the invention.

As described above, according to the pipe burying device of the present invention, it is possible to send water into the trough pipe, and a rotary type earth removal device is provided in the earth removal chamber, so that the inside of the trough pipe is not exposed to the outside air. Since the earth can be discharged by the cutter, it is possible to prevent sand and water from entering in excess of a specified amount, the face can be made independent, and the direction of the cutter head can be stabilized, and it is possible to avoid the troublesome opening and closing of gates and valves. It exhibits various excellent effects such as being able to proceed with excavation continuously without any operation.

[Brief explanation of drawings]

FIG. 1 is an overall explanatory diagram of the pipe embedding device of the present invention, FIG. 2 is an explanatory diagram of the propulsion reaction force block portion in FIG. 1, and FIG. 3 is a view taken in the - direction arrow of FIG. 1 is a cutter, 3 is an auger, 4 is a trough pipe, 7 is a propulsion reaction block, 11 is an adapter pipe, 12 is a water inlet, 13 is a water pipe, 15 is a fixed partition plate, 16 is a window, 18 is a rotating partition board, 19 is a cylindrical frame, 22 is a blade, 23 is a rotary,
24 indicates a discharge port.

Claims (1)

[Scope of utility model registration request] A trough pipe that rotatably houses the auger is connected and supported by a hollow propulsive reaction block, and the propulsive reaction block is partitioned in the radial direction of the trough pipe by a fixed partition plate having a window above. The position on the opposite side of the trough pipe from the fixed partition plate is partitioned in the radial direction of the trough pipe by a rotary partition plate that can be rotated around the longitudinal axis of the trough pipe, and the air is discharged between the fixed partition plate and the rotary partition plate inside the trough pipe. A partition plate that forms a soil chamber, has a discharge port at the bottom of the soil discharge chamber, and partitions the soil discharge chamber radially inside the soil discharge chamber to form a plurality of chambers that do not communicate with the window and the soil discharge port at the same time. is rotatably provided integrally with a rotary partition plate, and a water pipe whose pressure can be adjusted is connected to a position between the trough pipe of the propulsive reaction block and the fixed partition plate so as to supply water into the trough pipe. A pipe burying device featuring: