JPH05332089A - Force feeding method of earth/sand or the like by means of force feed pump - Google Patents

Abstract

PURPOSE:To achieve the elimination of labor, and also to prevent the racing of a force feed pump by enabling the automatic operation of the force feed pump. CONSTITUTION:When excavated earth, sand, or the like are forcedly fed by a hopper-fitted force feed pump 12 through a force feed pipe line 14, the level of the earth, sand, or the like inside the hopper 16 of the force feed pump is measured by a level gage 18 as an electric signal. When the measured level reaches the upper limit threshold level H, the operation of the force feed pump is automatically started, while the measured level reaches the lower limit threshold level L, the operation of the force feed pump is automatically stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for pumping earth and sand by a pressure pump, and is suitable for carrying earth and sand in a mud earth pressure shield construction method.

[0002]

2. Description of the Related Art Conventionally, as a method for carrying out earth and sand in a mud pressure shield construction method, a zuritro method has been generally used, but a pressure feeding method using a pressure feeding pump has recently been increasing.

FIG. 4 shows a Zuritro system in which the shield excavator 1 excavates the ground while the excavated soil is conveyed by the screw conveyor 2 and the belt conveyor 3
Throw in. When the Zuritro 4 becomes full, the driving vehicle 5 travels to the shaft 6, lifts it to the ground with the crane 7, loads the earth and sand into the earth and sand hopper 8, and transports it to another place by the dump truck 9 as needed.

FIG. 5 shows a conventional pressure feeding system, in which the earth and sand conveyed by the screw conveyor 2 as the shield machine 1 excavates is fed by the primary pressure feed pump 10 into the adjustment hopper 11 and then the adjustment hopper. 11 from the relay pressure feed pump 12 through the expansion tube 13 to the earth and sand hopper 8
Pump up to.

The pressure-feeding system using the pressure-feeding pump has the following advantages over the Zuritro system. Since excavation and sediment removal can be performed in parallel, work efficiency is high. The occupied area is small. Horizontal and vertical transportation can be performed continuously. High safety. There is little dirt inside the mine. Automation and labor saving are possible. High water resistance.

[0006]

However, in the conventional pressure feeding system, the automatic operation of the pressure feeding pump could not be performed, so that an operator was required for each pressure feeding pump. Usually 1
Since it is possible to pump about 4000 to 600 m with a single pump, two operators are required for each 1 Km pumping section, which causes a problem of high labor cost.

An object of the present invention is to enable automatic operation of the pressure-feeding pump to save labor and prevent the pressure-feeding pump from being idle.

[0008]

Means for Solving the Problems In the present invention, when pumping excavated soil and the like through a pressure-feeding pump with a hopper, the level of the soil and the like in the hopper of the pressure-feeding pump is measured as an electric signal by a level meter, When the measurement level reaches the upper limit threshold value, the operation of the pressure feed pump is automatically started, and when the measured level reaches the lower limit threshold value, the operation of the pressure feed pump is automatically stopped.

[0009]

In the present invention, the earth and sand are temporarily stored in the hopper of the pressure feed pump and then discharged from the hopper by the pressure feed pump and fed under pressure. The pressure-feeding pump automatically starts operation when the level of the sediment or the like in the hopper reaches the upper limit threshold, and pumps the sediment, and automatically stops when the level reaches the lower-limit threshold. Then, such an operation is repeated every time soil or the like is stored in the hopper.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. In FIG. 1, when the shield machine 1 excavates, the earth and sand resulting from the excavation are conveyed to the primary pressure pump 10 by the screw conveyor 2. A plurality of relay pressure-feeding pumps 12 with hoppers are sequentially connected to the primary pressure-feeding pump 10 via a pressure-feeding pipeline 14, and the earth and sand pressure-fed by the primary pressure-feeding pump 10 is measured by the earth-volume measuring device 15 to measure the amount of soil. While being measured, it is fed into the hopper 16 of the first-stage relay pressure-feed pump 12 through the pressure-feed conduit 14. Then
Similarly, from the first-stage relay pump 12 to the pumping line 1
Hopper 1 of the second-stage relay pressure feed pump 12 through 4
6 and then sequentially in the same manner to the hopper 16 of the relay pump 12 for the next stage, and from the relay pump 12 for the final stage to the ground hopper (not shown).
Is pumped to and carried out.

As shown in FIG. 2, each relay pressure pump 12 is provided with a level meter 18 for measuring the level of the earth and sand 17 stored in the hopper 16 and outputting an electric signal corresponding to the level. ing. In this example, an earth pressure gauge (for example, a strain gauge type) is used as the level gauge 18, and an electric signal corresponding to the level is output from the pressure of the earth and sand 17 in the hopper 16. Note that the level meter may be an ultrasonic level meter or a laser level meter that measures the surface of the earth and sand from above, or an electrode type that uses electric resistance.

In each relay pressure feed pump 12, an electric signal from the level meter 18 is input to a local computer 19 prepared for each relay pressure feed pump 12. Further, the local computer 19 is connected to a centralized monitoring control device 20 installed on the ground by an oiline,
Each relay pressure feed pump 12 is automatically controlled as follows via the local computer 19 according to a command from the centralized monitoring control device 20. That is, as shown in FIG. 2, with respect to the level of the sediment 17 stored in the hopper 16, an upper limit threshold H and a lower limit threshold L are set, and when the measurement level reaches the upper limit threshold H, the relay pressure pump The operation of 12 is automatically started, and when the lower limit threshold L is reached, the operation of the relay pressure feed pump 12 is automatically stopped. FIG. 3 is a flowchart of the operation.

Therefore, when the sediment in the hopper 16 exceeds the upper limit threshold value H, each relay pressure feed pump 12 automatically starts operation to discharge and feed the sediment 17 in the hopper 16 below the lower limit threshold value L. When this happens, the operation is automatically stopped to prevent runaway. Note that such control is performed by, for example, a sequencer control system, and the centralized monitoring control device 20 can collectively control and monitor all the relay pressure feed pumps 12.

In addition to the relay pressure feed pump 12, various devices of the shield machine 1 are also controlled by the centralized supervisory controller 20 via another local computer 19. Also,
Local computer 1 for relay pressure pump 12
In addition to performing the level determination of the earth and sand 17 in the hopper 16 as described above, the device 9 also detects the operating state of the relay pressure feed pump 12, and the relay pressure feed pump 12 or the pressure feed conduit 14 is abnormal. Also, an interlock function such as automatically stopping the operation of the shield machine 1 when a failure occurs or the like can be performed.

In the above description, the pumping of the excavated soil in the mud pressure shield construction method has been described as an example, but the present invention can be widely used in other underground excavation construction methods in which the slip is pumped out by the pressure pump. It is applicable.

As described above, according to the present invention, in each of the pressure pumps, the sand and the like are temporarily stored in the hopper, and when the level of the sand and the like in the hopper reaches the upper limit threshold value, the pressure pump is stopped. Automatically starts operation and pumps earth and sand,
Since the operation is automatically stopped when the lower limit threshold is reached, an operator is not required for each pressure feed pump, which saves labor costs by saving labor and prevents the pressure feed pump from being blown dry. Can be done efficiently.

[Brief description of drawings]

1 is an illustration of an example of a method according to the present invention.

FIG. 2 is a side view showing that the level of soil in the hopper is measured in each relay pressure pump.

FIG. 3 is a flowchart of an automatic operation control operation for each relay pressure pump.

FIG. 4 is an explanatory view showing a conventional method for carrying out earth and sand by the Zuritro method.

FIG. 5 is an explanatory diagram showing a conventional method for carrying out earth and sand by a pressure-feeding method.

[Explanation of symbols]

 12 pressure feed pump 14 pressure feed line 16 hopper 18 level meter

Claims (1)

[Claims] 1. A method of pumping earth and sand or the like in a hopper by a pressure pump for pressure-pumping the earth and sand and the like through a pressure-feeding pipe with a hopper, and measuring the level of the earth and sand in the hopper as an electric signal by a level meter, When the measurement level reaches the upper limit threshold, the operation of the pressure pump is automatically started, and when the lower limit threshold is reached, the operation of the pressure pump is automatically stopped. Pumping method.