JPS61153528A - Measuring instrument for discharge amount of earth of shield excavating machine - Google Patents

Abstract

PURPOSE:To measure the amount of sediment accurately by transporting earth which is carried in after excavating to a metering tank by an air pump, and receiving it by the metering tank and measuring its weight by a weight detector. CONSTITUTION:The earth from a pressure feed pipe 26 is discharged to the metering tank 30 and its weight is detected by the weight detector 32 continuously. Its detected weight signal 38 is inputted to an earth amount and earth pressure control means 39 to judge whether the set earth pressure in a cutter chamber 4 is proper or not from the actual discharge amount of earth, and the set earth pressure is corrected properly to control the discharge amount of earth of a screw conveyor means 10. An opening/closing means 33 is opened on one- ring drilling and the sediment is discharged to a lower hopper 29. Thus, a rough static load is measured and the sediment is measured by the metering tank; and the sediment of the metering tank is discharged to the hopper properly, and carrying-out operation in the transportation of the sediment on the ground is carried out without any hindrance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shield excavator, and more particularly to an earth excavation measuring device for a shield excavator that measures the amount of earth excavated by the shield excavator.

[Prior Art] A shield excavator has a cutter face plate rotatably provided in front of a cylindrical shield frame, a cutter chamber is formed within the shield frame, and a screw conveyor is installed in the cutter chamber to discharge earth and sand from the cutter chamber. is connected,
A tunnel is constructed by digging underground with a cutter face plate, taking the excavated earth and sand into the cutter chamber, and extending segments into a hole formed at the rear of the shield frame.

In order to prevent the face from collapsing, this shield excavator measures the earth pressure inside the cutter chamber, controls the rotation speed of the screw conveyor to keep the upper pressure constant, and controls the amount of earth removed. However, even if the tonosho is held constant, the amount of soil taken in differs, and as a result, there is a problem that a stable face cannot be obtained.

For this reason, the amount of earth and sand discharged from the screw conveyor is measured. In other words, when transporting earth and sand from a screw conveyor using a Zurito trolley, IiI is measured for each Zurito trolley and the soil flIf is
fi is determined, or the earth and sand from the screw conveyor is pumped to the ground by a pressure pump, and the transfer amount is determined from the drive speed of the pressure pump, or by an electromagnetic flow meter.

[Problems to be solved by the invention] However, when discharging earth and sand using a Zuritro trolley,
Since the weight of the sludge cart is measured as it moves, there is a problem in that the accuracy is poor and the sludge falls from the cart and pollutes the inside of the mine.

In addition, when transporting earth and sand using a pressure pump, the accuracy is poor if it is determined from the volume and driving speed of the pump, and when measuring with an electromagnetic flowmeter, it is expensive and is affected by the properties of the earth and sand, so it is not always accurate. There is a problem that is difficult to say.

[Object of the Invention] The present invention has been made in consideration of the above circumstances, and is a method for measuring the amount of soil discharged by a shield excavator, which is capable of accurately measuring the amount of soil taken in by the shield excavator when discharging the soil. The purpose is to provide equipment.

[Summary of the Invention] In order to achieve the above object, the present invention comprises a hopper supported on a pedestal, a measuring tank provided on the hopper for receiving earth and sand taken in and transferred by a shield excavation, and It is characterized by being equipped with a weight detector that detects the weight of the weighing tank, and an opening/closing means that is installed at the bottom of the weighing tank and discharges earth and sand into a hopper below.
The earth and sand excavated and brought in by a shield excavator is transferred to a weighing tank using a pressure pump, etc., and the weight is measured by a die mouth detector while being received by the weighing tank, which makes it possible to obtain accurate values and to make measurements possible. After that, the earth and sand are transferred to the lower hopper using an opening/closing means, thereby making it easier to measure and transport the earth and sand on the ground.

[Embodiment] Hereinafter, a preferred embodiment of the "excavated earth m measuring device for a shield excavator" according to the present invention will be described based on the accompanying drawings.

First, the entire shield excavation vM1 and its top sand discharge device will be explained with reference to FIG. In the figure, 1 is a shield excavator, and a cutter face plate 3 is attached to the front of a cylindrical shield frame 2.
A cutter chamber 4 is formed in the shield frame 2 behind the cutter face plate 3. shield tunneling machine 1
Tunnel 6 is constructed by installing segment 5 in the hole excavated in
is constructed. This tunnel 6 is constructed by carrying in the shield excavation *i from the shaft 7 and sequentially in the excavation direction from the shaft 7, and the segment 5 at the tip thereof is provided with a push jack 8 to allow the shield excavation machine 1 to excavate. ing.

A screw conveyor means 10 is connected to the cutter chamber 4 for discharging excavated earth 9 taken in through the cutter face plate 3. This screw conveyor means 10 consists of a primary screw conveyor 11 connected to the cutter chamber 4 and a secondary screw conveyor 13 connected to the secondary screw conveyor 11 via a flexible joint 12.

A closed tank 15 is connected to this screw conveyor means 10 via a flexible joint 14.

The sealed tank 15 has a screen 16 that separates gravel in the earth and sand.
The upper chamber 1 is divided into an upper chamber 17 and a lower chamber 18 by
7 is provided with an agitator 19 for stirring earth and sand, and an opening/closing lid 20 for discharging gravel. Further, the lower chamber 18 is provided with a pressure pump 21 that pumps the earth and sand in the lower chamber 18 to the ground. This pressure pump 21 is composed of a gravel pump or the like for transferring concrete or the like, and is driven and controlled by a pressure pump drive device 22 having a hydraulic pump 22a.

An earth pressure gauge 24 is provided in the upper chamber 17 of the sealed tank 15. The earth pressure gauge 24 consists of a total pressure gauge that measures the total pressure inside the lower chamber 17, and a water pressure gauge that separates water from the earth and sand using a filter or the like and measures the water pressure, and Tonosho subtracted the water pressure from the total pressure. Measured as direct. The detection signal of the soil pressure gauge 24 is input to the pressure pump control means 25, which outputs a control signal 23 to control the pressure pump drive device 22 so that the detected soil pressure is constant, and controls the amount of earth and sand discharged by the pressure pump 21. do. That is, the pressure pump control means 25 controls the oil pressure of the pressure pump drive device 22, and controls the drive speed (earth and sand discharge II) of the pressure pump 21 based on the change in the oil pressure.

A pressure feed pipe 26 is connected to the pressure pump 21, and the pressure feed pipe 26 extends above the ground through the vertical shaft 7.

In the middle of the pressure feed pipe 26, there is a telescopic pipe 27 connected in the form of a link.
is connected so that its length can be changed according to the excavation of the shield tunneling machine 1.

The pressure pipe 26 extending above the ground is connected to the soil displacement measuring device A of the present invention.

This discharged soil amount measuring device A will be explained in detail with reference to FIG. 1.

In FIG. 1, a hopper 29 is provided supported by a pedestal 28, and a metering tank 30 connected to the pressure feed pipe 26 is arranged on the hopper 29.

The weighing tank 30 is installed on a support stand 31, and a weight detector 32 such as a load meter is provided between the support stand 31 and the pedestal 29 to measure the weight of the weighing tank 30. Measuring tank 3
0 has an opening/closing means 33 such as a sliding gate at the bottom.
A drain tank 34 for separating and storing water in the measuring tank 30 using a filter or the like is provided on the support base 31, and a drain pipe 36 is connected to the drain tank 34 via a valve 35. A flexible pipe or the like is connected to the drain pipe 36 and the pressure feed pipe 26 in the middle so that there is no problem in measuring the weight of the weighing tank 30.

The capacity of the metering tank 30 is set such that the shield excavator 1 can accommodate one ring of excavated soil 9 of the segment 5, and the capacity of the hopper 29 is set such that it can accommodate several rings of excavated soil, and the capacity of the hopper 29 is set such that it can accommodate excavated soil 9 for one ring of the segment 5. A discharge gate (not shown) is provided at 37 to receive the earth and sand.

The detected weight signal @38 of the weight detector 32 is input to the earth pressure earth volume IIJill1 means 39 as shown in FIG.

The earth volume and earth pressure control means 39 control the propulsion speed 4 of the pushing jack 8.
0, a propulsion amount signal 41, and an earth pressure signal 43 from an earth pressure gauge 42 installed in the cutter room 4, and compare these signals with the detector signal 38 from the earth displacement measuring device WI8. and a drive motor 11a for the screw conveyor means 101, that is, the primary screw conveyor 11 and the secondary screw conveyor 13.

A signal 44.45 is outputted to control the rotation speed of 13a. That is, during steady state, the earth volume and earth pressure control means 39 sends a signal 44 to the screw conveyor means 10 so that the upper pressure thereof maintains the set earth pressure based on the earth pressure signal 43 of the cutter chamber 4.
．． 45 is output, and the amount of earth removed is controlled. However, the actual amount of earth removed from the detected amount l signal 38 is compared with the theoretical amount of earth removed, which is determined from the propulsion amount and speed of the shield excavation 1111, and the amount of earth removed is controlled by the screw conveyor. It is determined whether the amount of earth removed by the means 10 is appropriate, and as a result, if the amount of earth removed by the screw conveyor means 10 is appropriate, the excavation is continued in that state, and if it is inappropriate, the excavation is continued. The set earth pressure value is corrected to correct the amount of earth discharged by the screw conveyor means 10.

Furthermore, 46 is! m tank 18, pressure pump drive device 22,
A traveling trolley for moving the telescopic pipe 27 and the like during excavation, 47
is a water injection ring installed on the pressure feed pipe 26, and the soil removal amount measuring device A
Drainage from the drain pipe 36 is supplied to the water injection ring 47,
Facilitate the transport of sediment.

Next, the present invention will be explained in detail.

First, the excavation using shield excavation view 1 and the discharge of the earth and sand will be explained with reference to FIG.

The shield excavator 1 is pushed into the face by the pushing jack 8, and simultaneously excavates by rotating the cutter face plate 3.

Earth and sand 9 are taken into the cutter chamber 4 by digging.

In this case, the soil pressure in the cutter chamber 4 is detected by the soil pressure gauge 42, and the soil volume soil pressure control means 39 controls the screw conveyor means 10, i.e., the secondary screw conveyor 11 and the secondary screw conveyor so that the upper pressure is constant. Signal 4 on 13
4.45 is output, and the amount of earth and sand taken into the cutter chamber 4 is controlled.

The earth and sand discharged by this screw conveyor means 10 is supplied into a closed tank 15. The earth and sand supplied into the closed tank 15 first enters the upper chamber 17, where the gravel in the earth and sand is separated by the screen 16, and then enters the lower chamber 18.

Next, this soil and sand are sent to the waste soil amount measuring device ff1A of the present invention by the pressure pump 21 via the pressure pipe 26, but the pressure pump is controlled so that the upper pressure of the soil and sand in the tight tank 15 is constant. Since the soil supply amount of the pressure pump 21 is increased by $118 by means 25, the amount of soil discharged by the screw conveyor means 10 and the amount of soil fed by the pressure pump 21 are matched, and the amount of soil discharged by the screw conveyor means 10 is measured in the soil displacement measuring device IA. Earth and sand will be supplied according to the amount of soil.

As shown in FIG. 1, the earth and sand 9 from the pressure feed pipe 26 is discharged into the measuring tank 30, and the soil III is continuously detected by the weight detector 32, and the detected weight signal 38 is the earth and sand 9 shown in FIG. This metering tank 32, which is input to the earth pressure control means 39, collects earth and sand 9 when the shield excavator 1 newly excavates one ring after laying the segment 5.
If you do so and dig 1 ring, then NW1
The means 33 open and discharge the top sand 9 into the hopper 29 below. In this case, since the sediment flowing into the measuring tank 32 contains a large amount of water, the water is separated and transferred to the drainage tank 34, and only the sediment is discharged into the hopper 29. If the earth and sand are passed through the basin, there will be no problems such as the muddy water decreasing. In addition, the water from the drain 11134 is sent from the drain pipe 36 to the pressure pipe 26.
It is also possible to supply the water to the water injection ring 47 and use it for transporting earth and sand.

The weight signal detected by the weight detector 32 in this way is input to the earth volume earth pressure υIII means 39, which judges whether the set earth pressure of the cutter chamber 4 is appropriate from the actual earth removal area as described above, and as appropriate. The amount of earth discharged by the screw conveyor means 10 is controlled by correcting the set upper pressure.

In the above-described embodiment, the measuring tank 30 is provided substantially fixedly on the hopper 29, but the hopper 29
may be arranged in parallel, and the weighing tank 30 may move over the hoppers 29 to discharge earth and sand into each hopper 29.

[Effects of the Invention] As is clear from the detailed description above, the present invention exhibits the following excellent effects.

(1) Since it is divided into a hopper for discharging sediment and a measuring tank for measuring weight, the continuously discharged sediment can be measured in the measuring tank, and the sediment in the needle wheel tank can be appropriately discharged to the hopper. It does not cause any hindrance to the removal of earth and sand during transportation.

(Sh) Since the weight of the measuring tank is detected, it can be measured as a nearly static load, and unlike conventional electromagnetic flowmeters, it is possible to accurately determine the soil layer without being affected by the properties of the soil.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the earth excavation amount measuring device for a shield excavator according to the present invention, and the second factor is a diagram showing an overall outline of the earth excavation amount measuring device for a seed excavator according to the present invention. . In the figure, 1 is a shield excavator, 9 is earth and sand, 29 is a mount, 3
0 is a weighing tank, 31 is a hopper, 32 is a weight detector,
33 is an opening/closing means. Patent Applicant: Ishikawajima-Harima Heavy Industries Co., Ltd. Representative Patent Attorney Nobuo Kinutani Figure 1 30... Jst7n7 37...A-7,)\-32 Weight 6 Edge 33... 1 in 74 'f Yoshi

Claims (1)

[Claims] A hopper supported on a pedestal, a weighing tank installed on the hopper to receive earth and sand taken in and transferred by a shield excavator, a weight detector for detecting the weight of the weighing tank, and a weighing tank installed at the bottom of the weighing tank. A device for measuring the amount of earth discharged by a shield excavator, which is equipped with an opening/closing means for discharging earth and sand into a hopper below.