JP3408857B2 - Sediment transport equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for transporting earth and sand, and more particularly to an apparatus for transporting earth and sand generated from a face in a shield method to the ground. 2. Description of the Related Art Conventionally, there is a sediment transporting apparatus for carrying out sediment generated at a face in a shield method to the ground, for example, as shown in FIG. [0003] In this method, earth and sand 11 discharged from a shield excavator 10 are loaded on a battery locomotive 12, and the shaft 1
3 and then to the ground 14. A piston pump 15 is provided at the bottom of the shaft 13, and a pipe 16 extending from the piston pump 15 to the ground 14 extends. [0004] The earth and sand 11 or the earth and sand to which water is added as required is carried into the piston pump 15, and these are pumped upward. On the ground, the pumped earth and sand is discharged, loaded on a truck 17 or the like, and transported. [0005] However, in the above-mentioned prior art, it is necessary to push the earth and sand 11 upward by the height of the vertical shaft 13, but the height of the earth It depends on the ability, and the higher the resistance, the more the resistance increases sharply. This is because the pressure in the pipe 16 increases and the resistance between the soil 11 and the pipe 16 increases. [0006] Therefore, it is extremely difficult to carry out above a certain height. In addition, it may be difficult to discharge with the piston pump 15 depending on the soil. Conventionally, the earth and sand 11 were transported by reciprocation of the battery locomotive 12, resulting in poor efficiency. In addition, since the rail 18 is indispensable for the operation of the battery locomotive 12, installation work is required and the cost increases. When the battery locomotive 12 is operated, the earth and sand scatter in the pit, which may cause the pit to become dirty. [0007] Furthermore, the piston pump 15 is generally a large and heavy device. However, since the piston pump 15 needs to be installed in a narrow mine, the installation and removal work is complicated, and the material for the mine is not limited. Also, it is difficult to carry in and out, so that workability may be significantly reduced. [0008] The present invention has been made in view of the above-mentioned problems, and enables smooth discharge of sediment even when the height difference is large. It is an object of the present invention to provide a soil and sand transport device capable of performing the above-mentioned steps. Means for Solving the Problems In order to solve the above-mentioned technical problems, the present invention has the following configuration in an apparatus for carrying out earth and sand generated from a face in a shield method to the ground. That is, a transport pipe 1 connecting the face side and the ground side, a suction pump 3 connected to a discharge side 2 of the transport pipe 1, and a sediment loading provided on a suction side 8 of the transport pipe 1. And a pneumatic inlet 5 opening in the middle of the transport pipe 1, and an air pump 6 for pumping air to the pneumatic inlet 5. The technical means is that the earth and sand sent from the earth and sand loading machine 4 into the conveying pipe 1 is conveyed by an air flow from the air pressure inlet 5 to the suction pump 3. Further, an air release valve for releasing excess air is provided between the earth and sand transporter 4 and the air pressure inlet 5.
I am. Further, it is preferable to provide a plurality of air pressure inlets 5 according to the length of the transport pipe 1. It is desirable to provide a separator for separating air and earth and sand at a stage preceding the suction pump 3. The earth and sand is pressure-fed from the earth and sand loading machine 4 into the transport pipe 1, and the air is also pressure-fed from the air pump 6 to the air pressure inlet 5. At the same time, the suction pump 3 operates.
Then, the suction pump 3 is inserted into the transport pipe 1 from the air pressure inlet 5.
An airflow is generated that leads to Sediment is transported upward by this air flow and discharged to the ground. As described above, since the transport pipe 16 is pressurized and suctioned, the internal pressure does not increase more than necessary, and the transport does not become difficult due to the soil. Further, even if the transport distance of the earth and sand is lengthened, the resistance does not increase extremely unlike the conventional case, so that it is not necessary to use a high-output pump. An air release valve 7 for releasing excess air between the earth and sand carry-in machine 4 and the air pressure inlet 5 is provided.
Is for preventing the earth and sand from flowing backward from the earth and sand carry-in machine 4 by air pressure. Further, since the earth and sand can be continuously conveyed, it is not necessary to transport the earth and sand as in the prior art, and the earth and sand discharge efficiency is greatly improved. Furthermore, rails are not required, and the mine is not contaminated. Since no piston pump or the like is required, there is no need to install or remove the piston pump, so that the construction period can be shortened. An embodiment of the present invention will be described with reference to FIG.
This embodiment is an apparatus for carrying earth and sand continuously discharged from the rear of a shield excavator 10 to the ground. The shaft where the shield excavator 10 is installed is a horizontal shaft 20, and the earth and sand is discharged from a shaft 21 continuous with the horizontal shaft 20. A transport pipe 1 for connecting the face side of the shield excavator 10 and the ground side is installed in the horizontal shaft 20 and the vertical shaft 21. A suction (vacuum) pump 3 is connected to the discharge side 2 of the transport pipe 1. This suction pump 3
Is driven by a motor 3a, and a separator 3b for separating earth and sand and air is interposed between the suction pump 3 and the transport pipe 1. On the other hand, on the suction side of the transport pipe 1, a sediment carrying-in machine 4 is provided. This earth and sand carry-in machine 4 is arranged inside the cylinder so that the screw 4a can be rotated,
Earth and sand are scraped in from the tip of the cylinder with the screw 4a. In the middle of the conveying pipe 1, an air pressure inlet 5 is provided.
Are provided at three locations, and a pressurized air pipe 22 is connected to the air pressure inlet 5. This pressurized air pipe 2
An air pump 6 for pumping air to the air pressure inlet 5 is connected to the tip of 2. The air pump 6 is driven by a motor 6a. It should be noted that the suction pump 3
The transport pipe 1 is provided with a vacuum gauge 5a and a switch 5b interlocked with the vacuum gauge 5a. The switch 5b activates the electromagnetic solenoid 5c, and the electromagnetic solenoid 5c
The air flow rate of the air valve 5d provided so as to be interlocked with c is controlled. The air valve 5 d is interposed between the air pressure inlet 5 and the pressurized air pipe 22, and is configured to control the flow rate of air flowing from the air pump 6 into the inside of the transport pipe 1. An air release valve 7 for releasing excess air is provided between the earth and sand carry-in machine 4 and the air pressure inlet 5.
Is provided. Here, when conveying the earth and sand, first, the earth and sand carry-in machine 4 and the air pump 6 are operated. Then, an air flow from the air pressure inlet 5 to the suction pump 3 is generated in the transport pipe 1. Sediment is transported upward by this air flow and discharged to the ground. At this time, the pressure in the transport pipe 1 is constantly monitored by the vacuum gauge 5a. That is, normally, air is supplied from the air pressure inlet 5 at a pressure of 1 atm. However, when the degree of vacuum in the transport pipe 1 increases due to an increase in the amount of earth and sand, the air valve 5d is opened and closed. Blow off earth and sand. On the other hand, when more air than necessary is flowing from the air pressure inlet 5, the air valve 5d is adjusted so that only an appropriate amount of air enters. The flow rate of the air release valve 7 is separately controlled by a pressure gauge so that the earth and sand do not flow backward from the earth and sand loading machine 4 due to the air pressure. As described above, since the transport pipe 16 is pressurized and suctioned, the internal pressure does not increase more than necessary, and the transport does not become difficult due to the soil. Therefore, the earth and sand flowing inside is smoothly transferred without a large resistance. Further, since the earth and sand can be continuously conveyed, it is not necessary to transport the earth and sand as in the prior art, thereby greatly improving the earth and sand discharge efficiency. Further, since the conventional battery locomotive is not required, the pit is not contaminated.
Since no piston pump or the like is required, there is no need to install or remove the piston pump, and it is possible to shorten the construction period. Particularly in a tunnel having a small cross section, it is particularly effective because there is not enough installation space. According to the present invention, when transporting the earth and sand discharged by the shield method, a transportation pipe is provided and the interior of the transportation pipe is suctioned and pressurized to transport the earth and sand. The rise in pressure in the transfer pipe is suppressed, and the transfer can be easily performed even if the height difference is large. In addition, continuous discharge becomes possible, and the work efficiency is greatly improved. Further, since the equipment in the mine can be reduced in size, the cost can be reduced and the construction period can be shortened.

[Brief description of the drawings] FIG. 1 is a side view showing an embodiment of the present invention. FIG. 2 is a side view showing a conventional earth and sand transport device. [Explanation of symbols] 1 .... conveying pipe, 2 ・ ・ Discharge side, 3. Suction pump, 4 ・ ・ Equipment for earth and sand, 5 ... Air pressure inlet, 6. Air pump, 7 ... Air release valve, 8. The suction side.

Claims (1)

(57) [Claims 1] In an apparatus for carrying out earth and sand generated on a face in a shield method, a transport pipe connecting a face side and a ground side, and discharging of the transport pipe Pump connected to the suction pipe, an earth and sand loading machine provided on the suction side of the transfer pipe, an air pressure inlet opening in the middle of the transfer pipe, an air pump for pumping air to the air pressure inlet, and the earth and sand Loading machine and the air pressure
An air vent provided to escape excess air between the inlet
An earth and sand transport device comprising a release valve and transporting the earth and sand fed from the earth and sand loading machine into a transport pipe by an air flow from the air pressure inlet to a suction pump.