JPH0230892A - Sediment pumping machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is for efficiently pumping earth and sand excavated by a face to the outside of a shaft in a narrow working space inside a pipe in a shield construction method or a propulsion construction method. , gravel, sand, silt,
Pertains to equipment that continuously transports mixed earth and sand such as clay.

[Conventional technology]

Conventional technologies for continuously conveying powder or viscous materials include using a screw conveyor, pressure feeding using a piston motion of a cylinder, and vacuum evacuation using a vacuum, but all of these methods are used to convey soft, uniform materials with large slump. The purpose is to transport materials, and among these, in the case of mixed earth and sand in civil engineering work, it is the only one that applies the structure of a concrete pump, for example, after sucking the earth and sand from a hopper into the piston part of a cylinder, Mainly used are pumps that switch between pumps and pump the suctioned earth and sand. However, even in the case of such a device, the efficiency is extremely low unless it is suctionable, that is, soil with a large slump, and it is not practical.Also, since the suction and discharge gate mechanisms are independent, the machine This makes it difficult to install in a narrow space like the propulsion method.

[Problem that the invention seeks to solve]

Therefore, in the case of conventional technology, it can be used for transporting uniform materials with soft soil quality, but when the soil properties change frequently, such as excavated soil for shield construction or propulsion construction, for example, soft soil with large slump can be used. In the case of low slump soil, etc., the suction efficiency decreases and it cannot be used.Also, when installing in a narrow pipe, most gates operate perpendicular to the pumping direction. However, the gate mechanism is large and complicated, making it difficult to install it in a narrow pipe.

Therefore, with the present invention, mixed soil such as gravel, sand, silt, clay, etc., or mixed soil from low slump to high slump, and soil whose soil properties change can be continuously pumped quantitatively over long distances, and it can be installed even in narrow spaces. This is to provide a pressure feeding machine that can.

[Means and actions for solving the problem] Transfer chamber 8-1,
Gate section 4-1.4-2 for supplying earth and sand to 3-2
By enlarging the earth and sand passage port 17, it is possible to powerfully take in earth and sand without depending only on the suction action of the pressure-feeding piston 2-1, 2-2, but also by the combined effect of falling under its own weight.

Moreover, the first gate section 4-1.4-2 and the second gate section 6-1
．． The opening and closing operations of gates 6-2 are performed by one horizontal gate plate 7-1, respectively.
7-2, and by making the operating direction parallel and horizontal to the pumping direction, the width and height of the pumping machine main body were made small.

〔Example〕

One embodiment of the present invention is shown in FIGS. 1, 2, 3, 4,
It is shown in FIG. 5, FIG. 6, and FIG. 7, and will be specifically explained.

Two stirring and feeding screws 16 are provided in the hopper 1, and at the bottom of the hopper 1 there are conveying chambers 3-1 and 3-2 having two pumping pistons 2-1 and 2-2. It is installed independently, and the pumping piston 2-1, 2-2 is driven by the hydraulic cylinder 8-1, 3-2. At the top of the transfer chambers 3-1 and 3-2, there is a first
Gate portions 4-1 and 4-2 are provided horizontally. Conveyance pipes 5-1 and 5-2 are connected to the front parts of the conveyance chambers 3-1 and 3-2, respectively, and are raised diagonally upward, and during the start-up, a second gate part 6 is installed to open and close the passage of earth and sand. -1.6-2 is installed horizontally. The communication pipe 1 is interposed through the conveying pipe 5-1, 5-2.
0-1 and 10-2 are connected and merged through a Y-shaped pipe 11. Passing from the rear of the first gate part 4-1.4-2 to the front of the second gate part 6-1.6-2, the upper part of the transport chambers 8-1, 3-2 and the transport pipe 5-1. One horizontal gate plate 7-1゜7-2 is installed parallel to the pumping direction and horizontally so that it can be opened and closed at once, and the horizontal gate plate 7-1゜7-2
In order to take in the earth and sand, a pressure piston 2-1.2-
One large earth and sand passage port 17 having a width and length equivalent to the diameter and stroke of No. 2 and a large opening surface compensation is provided in each place. The horizontal gate plate 7-1.7-2 is the guide L/-ru 1.
5-a15-b and t5-C, and is driven by a hydraulic cylinder 9-1.9-2. Horizontal gate plate 7-
The drive of the piston 1.7-2 and the drive of the pressure-feeding piston 2-1.2-2 are operated in conjunction with each other by a hydraulic sequence.

The earth and sand that has just been put into the hopper 1 is sent into the vicinity of the first gate section 4-1.4-2 at the top of the transfer chamber 3-1.3-2 by the stirring and supply screw 16, and is passed through the earth and sand passage port with a large opening area. It passes through I7 and is taken into the transfer chamber 3-1. Next, as shown in FIG. 7, the horizontal gate plate 7-1 is pushed forward by the hydraulic cylinder 9-1, and the earth and sand passage port 17 of the horizontal gate plate 7-1 is connected to the second gate section 6-1 in the front.
move to. At this point, the opening of the first gate section 4-1 at the top of the transfer chamber 3-1 is closed, and the second gate section 6-1 is opened when the earth and sand passage port 17 comes. Next, as shown in FIG. 4, the pressure-feeding piston 2-1 is pushed out by the hydraulic cylinder 8-1 to force-feed the earth and sand in the transfer chamber 3-1. Then, as shown in Figure 5, the pressure piston is pushed out,
When fully extended, the horizontal gate plate 7-1 becomes the hydraulic cylinder 9-1.
, the earth and sand passage port 17 moves to the rear first gate section 4-1, the opening of the first gate section 4-1 opens, and the open opening of the second gate section 6-1: Imaginary closed. Furthermore, as shown in FIG. 6, the pressure feeding piston 2-1
is pulled back by the hydraulic cylinder 8-1, the earth and sand in the earth and sand hopper 1 is taken into the transfer chamber 3-1 again, and the above-mentioned operation is repeated. At this time, already! The pressure-feeding piston 2-2 and the horizontal gate plate 7-2 are hydraulic cylinders 8-2 linked to hydraulic cylinders 8-1 and 9-1, respectively.
．． 9-2 performs the opposite operation, and the pressure-feeding piston 2-
1 is pumping earth and sand, one of the pumping pistons 2
-2 retreats to take in the earth and sand, and when the pressure-feeding piston 2-1 finishes feeding the earth and sand, the horizontal gate plate 7-1 switches, and when the force-feeding piston 2-21 is retreating, one of the pressure-feeding pistons 2-2 The earth and sand are pumped continuously.

The above constitutes one embodiment of the earth and sand pumping machine of the present invention.

〔Effect of the invention〕

In the present invention, the opening of the first gate part, that is, the sand passage port, has a diameter and stroke equivalent to the diameter and stroke of the piston. By increasing the width and length, the opening area becomes larger, and instead of relying solely on the suction force of the piston, we also take into account the fall of the earth and sand under its own weight.
The filling efficiency in the transfer chamber was as high as almost 100%, and the so-called empty piston feeding phenomenon was completely eliminated. In addition, since the two pumping pistons always have one side for pumping and the other for taking in the earth and sand into the transfer chamber, it has become possible to efficiently and continuously pump the earth and sand in a quantitative manner. Furthermore, since the first gate part that takes in the earth and sand and the second gate part that stops the passage and backflow of earth and sand are opened and closed by a single horizontal gate plate, the gate mechanism is simplified and the operating direction of the gate can be changed. By making it parallel and horizontal to the pumping piston, it is possible to reduce the cross section occupied by the device in a narrow pipe cross section, and the propulsion method can also be applied to small diameter pipes.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view of the earth and sand pumping machine of the present invention. FIG. 2 is an explanatory plan view of the earth and sand pumping machine (stirring and supply screws are not shown). FIG. 3 is a sectional view taken along the line A-A in FIG. 1, and FIGS. 4 to 7 are explanatory views of the operation of the horizontal gate and the pressure-feeding piston. In the figure, 12 is a drive motor for the stirring and supply screw. 13 and 14 indicate seals. Figure Figure Figure Figure

Claims (1)

[Claims] 1) Sediment hopper 1 is equipped with 2 to 3 sets of stirring and feeding screws 16, and independent transfer chambers 3-1 and 3 each have two sets of pressure-feeding pistons 2-1 and 2-2 at the bottom of hopper 1.
-2 is provided, first gate portions 4-1, 4-2 are provided at the upper part to take in earth and sand into the chambers 3-1, 3-2, and the transfer chamber 3-
Conveyance pipes 5-1 and 5-2, which are raised diagonally upward, are connected to the front parts of the pipes 1 and 3-2, respectively, and second gate parts 6-1 and 6-2 through which earth and sand pass are connected to the front parts of the pipes 1 and 3-2. is provided, and the transfer chamber 3
-1, 3-2 and the upper part of the conveyor pipes 5-1, 5-2 from the rear of the first gate part 4-1, 4-2 to the second gate part 6-1, 6
-2 One horizontal gate plate 7-1, 7- through the front
2 is installed so that it operates parallel and horizontally to the pumping direction,
The horizontal gate plates 7-1 and 7-2 each have one earth and sand passage port 17 with a large opening area, and the horizontal gate plates 7-
1 and 7-2 and the driving of the pumping pistons 2-1 and 2-2 are linked by a hydraulic sequence.