JP2638267B2 - Rotary lifter with weighing scale - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a rotary lifter with a weighing scale, which constitutes an earth removal device in an earth pressure type shield excavator.

(Prior Art) In the earth pressure type shield excavator, since the excavated earth and sand are filled into the face and the cut-out and pressurized to hold the face, it is possible to accurately and quickly grasp the excavated soil amount and the earth removal amount. This is an important factor for controlling the excavation of earth pressure shield excavators.

 Conventional excavation control methods include the following two methods: i) excavation control by soil volume control; ii) excavation control by earth pressure management.

The former method is a method of measuring the amount of excavated soil and reducing the value to the excavation speed and the number of revolutions of the screw conveyor to control the amount of excavated soil and the amount of excavated soil.

The latter method is a method of managing the excavation speed and the earth removal amount so as to keep the earth pressure in the Katsutachiamba at a set value.

(Problems to be solved by the invention) However, in the former excavation control method based on soil volume management, the actual method of measuring the amount of earth removal is as follows. Depending on the number This is due to the installed measuring instrument, etc., and the measurement timing and accuracy are not satisfactory.

The earth pressure measurement method in the excavation control method by the earth pressure management has an advantage that measurement is relatively easy and a time difference between the measurement and the reduction of the measured value to the control is small. There is a problem in durability and reliability. Further, it is difficult to set a management value on the ground where the stratum changes rapidly.

The present invention has been proposed in view of the above-mentioned problems of the related art, and has as its object to provide a rotor lift feeder with a weighing scale that can accurately and accurately measure the amount of soil discharged from an earth pressure shield excavator in real time. .

(Means for Solving the Problems) In order to solve the above-mentioned object, a rotor lift feeder with a weighing scale according to the present invention includes a pair of opposed rotor lift feeder side plates fixed to a rotor lift feeder driving rotation shaft. A plurality of buckets which are separated and independent from each other are mounted along the circumference of the rotating shaft and the weighing scale is mounted on each of the buckets, and each of the buckets is soiled with rotation of the rotor lifter. It is configured to pass through a position directly above the vertical direction and separated from the intake port.

(Operation) Since the present invention is configured as described above, the rotor lift feeder driving rotation shaft is driven to rotate one pair of rotor lift feeder side plates fixed to the rotation shaft, and the rotor lift feeder is provided between the side plates. A plurality of buckets, separated and independent from each other, which are arranged along the circumference of the drive rotation shaft and concentric with each other, are rotated, and the bucket to which the earth is discharged from the sediment inlet is separated from the sediment inlet. When occupying the position directly above in the vertical direction, the weight of the earth and sand of the bucket can be measured in real time by a weighing scale mounted on the bucket.

By weighing when the bucket comes directly above the bucket, the weight of the bucket including the earth and sand remaining in the bucket can be measured, and this measured value is subtracted from the measured value directly above the bucket to obtain the discharged weight. Can be measured, and thus weighing loss due to friction around the bucket can be corrected.

(Example) Hereinafter, the present invention will be described with reference to an illustrated example.

(A) is a rotor lifter with a weighing scale, in which a pair of rotor lifter side plates (2) opposed to a rotor lifter driving rotary shaft (1) which is driven and rotated by a drive mechanism at an interval is fixed, Same side plate (2) and same side plate (2)
A plurality of buckets (4) which are separated and independent from each other are mounted along a concentric circle centered on the drive rotation shaft (1) between the partition plate (3) and the bucket (4). ) Is connected between the two side plates (2) and has a strain gauge (5).
Is supported via a supporting member (7) on a bucket supporting beam (6) with a weighing scale, on which is mounted. A ball bearing (8) is interposed between the end of the supporting member (7) and the bucket supporting beam (6), and is provided only in a direction perpendicular to the bucket supporting beam (6). The load from the bucket (4) is transmitted.

Thus, the bucket supporting beam (6) on which the strain gauge (5) is mounted and the supporting member (7) constitute a weighing scale mounted on the bucket (4).

The rotor lifter (A) is connected to the drive rotation shaft (1)
As the bucket rotates, the buckets (4) sequentially pass through the discharge port (9) of the screw conveyor (B) disposed in the shield excavator, and are excavated and conveyed by the screw conveyor (B). The earth and sand is taken into the bucket (4), and occupies a position directly above the discharge port (9) in the vertical direction as shown in (4a) at a position away from the discharge port (9), and is further rotated downward (4b).
The soil is discharged at the position shown in (1), passes through the position just below the vertical direction shown in (4c), and then continues to rotate upward again.

In the figure, (10) is a screw conveyor drive device, and (11) is a discharge gate.

Since the illustrated embodiment is configured as described above,
When the rotary shaft (1) is driven to rotate the pair of side plates (2), the bucket (4) mounted between the side plates (2) and concentrically with the rotary shaft (1). ) Also rotates and passes through the discharge opening (9) of the screw conveyor (B) to take in the discharged soil conveyed by the screw conveyor (B).

Thus, when the bucket (4) is separated laterally from the discharge port (9) and is located immediately above in the vertical direction as shown in (4a), the bucket (4) and the inside of the bucket (4) Can be measured in real time by a strain gauge (5) mounted on the bucket support beam (6).

Then, the bucket (4) that took in the earth was further rotated,
At the position shown in (4b), the soil is discharged and carried out of the mine by a carrying-out device (not shown).

Further, when the bucket (4) is rotated and positioned directly below in the vertical direction shown in (4c), the sediment remaining in the bucket (4) is removed by the strain gauge (5) mounted on the support beam (6). The weight of the bucket (4) can be measured.

Therefore, the earth removal weight can be measured by subtracting the measurement result at (4c) immediately below the vertical direction from the measurement result at (4a) immediately above the vertical direction.

By this operation, the metering loss due to friction around the bucket (4) can be corrected.

As described above, according to the rotor lifter with a weighing scale shown in the above-described embodiment, the amount of soil discharged from the earth pressure shield excavator can be measured in real time. Therefore, the amount of soil corresponding to the amount of shield excavation can be discharged.

As a result, an appropriate amount of soil can be filled in the Katatsuchiamba of the earth pressure shield excavator, and an appropriate pressure of mud can be maintained, so that the excavation is performed without loosening the ground and without raising the ground. It becomes possible.

Note that a strain gauge (5) was used as a weighing scale provided in the bucket (4).
When the weight of the bucket (4) is measured by the bending strain of the bucket supporting beam (6) by using a strain gauge (5) is arranged on two cross sections of the supporting beam (6), the soil and the bucket are removed. (4) Even if it is unevenly distributed, correct measurement can be performed.

The gap between the bucket (4) and the rotor lifter side plate (2) is sealed with grease or the like to prevent earth and sand from entering the outer periphery of the bucket (4), and water is mixed in the earth and sand. However, it is possible to prevent the measurement from being affected.

Further, when a rotary lifter with a weighing scale is used in combination with the screw conveyor (B), the rotor lift feeder (A) is used for closing the discharge port (9) of the screw conveyor (B). be able to. This is because the buckets (4) are independent of each other and have no effect during weighing.

(Effects of the Invention) As described above, the rotor lifter with a weighing scale according to the present invention is provided between a pair of opposed rotor lifter side plates fixed to a rotor lifter driving rotation shaft, on a circle concentric with the rotation shaft. A plurality of buckets which are separated and independent from each other along with a weighing scale are mounted, and pass through a position just above the vertical direction separated from the sediment intake with rotation of the rotor lifter. As a result, it is possible to accurately and in real time measure and manage the earth removal amount of the earth pressure shield excavator, so that it is possible to discharge the soil amount corresponding to the excavation amount of the earth pressure shield excavator, and as a result, The excavator is able to fill the Katsutachiamba with the appropriate amount of soil and maintain the appropriate mud pressure, so that the ground is not loosened and the surrounding ground is raised. The excavation work can be performed safely and efficiently without causing the excavation work.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the operating state of a rotor lifter with a weighing scale according to the present invention, FIG. 2 is a perspective view with a part thereof cut away, and FIG. 3 is a partially enlarged longitudinal sectional side view thereof. It is. (A): Rotary lifter with weighing scale (1) Rotary shaft for driving the rotary lifter (2) Side plate (4) Bucket (5) Strain gauge (6) … Bucket support beam.

Claims (1)

(57) [Claims] 1. A plurality of buckets which are separated and independent from each other along a concentric circle with the rotating shaft are mounted between a pair of opposed rotor lifter side plates fixed to a rotating shaft for driving a rotor lift feeder. A weighing scale is mounted on the bucket, and each of the buckets is configured to pass through a position directly above in a vertical direction separated from the sediment inlet with rotation of the rotor lifter. Rotary lifter with weighing scale.