JPH01310097A - Injection pump discharge controller for backfilling material simultaneous automatic dosing device - Google Patents

Abstract

PURPOSE:To prevent a tail void from collapsing with certainty by operating a compensating flow setting means with output of an injection pressure sensor set up in a center runner of air inclusive backfilling material, and making it so as to control the discharge of an injector pump through the output. CONSTITUTION:A compensating flow setting means is set up in a backfilling material automatic dosing device with an injection ratio setting means, a theoretical injection quantity outputting means and a planning injection quantity outputting means. This compensating flow setting means is operated by output of a pressure sensor set up in a center runner, and controls the discharge of an injector pump. In this case, the planning injection quantity outputting means set by this compensating means in an atmospheric state is compensated by actual injection pressure. With this constitution, a space of a tail void can be fully filled up with air inclusive backfilling material.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for an automatic backfilling material simultaneous injection device that backfills air-containing backfilling material into a tail void formed by a shield excavator simultaneously with shield propulsion. It is something.

[Conventional technology]

Conventionally, in a simultaneous automatic backfill injection device that follows the excavation speed of backfill material called "air mortar," the theoretical tail void volume (instantaneous value) calculated from the excavation speed of the shield excavator and the "tail void area" is used. ) is controlled by the injection pump of each method to discharge the planned injection amount obtained by multiplying the set backfilling material injection rate.

[Problem to be solved by the invention]

In conventional infusion pump control, the planned infusion volume delivered by the infusion pump is the volume at atmospheric pressure.

However, when the backing material containing air passes through the injection pump, the air is compressed, so when the backing material is discharged from the injection pump into the tail void based on the planned injection volume, it contracts, and is smaller than the theoretical tail void volume. The amount will also be small. Therefore, the tail void space cannot be completely filled with the backing material, and there is a risk that the tail void may collapse depending on the case.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a control device for an automatic backfilling material simultaneous injection device that controls an injection pump so that the tail void space can be completely filled with backfilling material.

[Means to solve the problem]

In order to achieve this object, the present invention provides a control device for a simultaneous automatic injection system for backfill material that backfills air-containing backfill material into a tail void formed by a shield excavator at the same time as shield propulsion. A theoretical injection amount output means that outputs the theoretical injection amount which is the instantaneous theoretical tail void volume value of the product of the output from the speed sensor and the tail void area determined by the shield excavator, and the injection rate of the backfill material is set by a switch on the operation panel. an injection rate setting means for setting the injection rate, a planned injection amount output means which is the product of the output of the injection rate setting means and the output of the theoretical injection amount output means, and an injection pressure at the injection location relative to the output of the planned injection amount output means. Correction flow rate setting means for calculating the flow rate of the backfill material under the injection pressure based on the output from the injection pressure sensor to be detected and the air content signal of the backfill material measured in advance and converted into an electrical quantity. ,
The present invention is characterized in that the discharge amount of the backfilling material injection pump is controlled by the output of the correction flow rate setting means (see FIG. 1).

[Effect]

According to the control device of the present invention, the correction flow rate setting means outputs the planned injection amount based on the injection pressure at the injection location detected by the injection pressure sensor and the air content signal of the backfilling material measured in advance and converted into an electrical quantity. The output of the means is corrected to calculate the flow rate of the backfilling material to be filled into the tail void under injection pressure, and the discharge amount of the backfilling material injection pump is controlled by the output of the corrected flow rate setting means.

〔Example〕

Next, preferred embodiments of the present invention will be described with reference to the drawings.

Figure 2 shows liquid A containing air and liquid B containing no air.
The block circuit diagram of the control device of the two-component type backfilling material simultaneous injection device which backfills the air-containing backfilling material consisting of two liquids into the tail void formed by the shield excavator at the same time as shield propulsion is shown.

This control device has a theoretical injection amount which is the instantaneous theoretical tail void volume value of the product of the area of the tail void 2 inherent in the shield excavator 1 or detected by a sensor and the excavation speed of the shield excavator I detected by the excavation speed sensor. is calculated by the theoretical injection amount output means 3, and the result is inputted to the planned injection amount output means 4.

The planned injection amount output means 4 is further inputted with an output from an injection rate setting means 5 operated by a switch provided on an operation panel (not shown), and the planned injection amount is the product of the injection rate and the theoretical injection amount. is calculated, and the results are input to the A liquid planned injection amount output means 6 and the B liquid planned injection amount output means 7.

The A liquid planned injection amount output means 6 further outputs the A liquid mixing ratio obtained from the output of the B liquid mixing ratio setting means which is operated by a switch provided on an operation panel (not shown) and the output of the planned injection amount output means 4. The planned injection amount of liquid A is calculated by multiplying the planned injection amount of liquid A by the planned injection amount of liquid A, and the result is inputted to the liquid A correction flow rate setting means 9. On the other hand, the B liquid planned injection amount output means 7 outputs the B liquid mixture ratio setting means 8.
B liquid mixture ratio and planned injection amount output means 4 obtained from the output of
Calculate the planned injection amount of B liquid as the product of the output of and the planned injection amount.

The A liquid correction flow rate setting means 9 is connected to the injection pipe 1 of the backfilling material injection device.
From the injection pressure P output from the pressure sensor installed at A corrected flow rate of liquid A supplied to the liquid A injection pump is calculated so that the flow rate is equal to the liquid A, and the result is input to the liquid A supply pump actuator 11.

The compressed volume Q of liquid A under injection pressure (gauge pressure) P is equal to the planned injection of liquid A MvA (QP=
VA) The correction formula for determining the corrected A liquid flow rate Q0 (under atmospheric pressure) may be as follows.

By controlling this A liquid supply pump actuator 11, the A liquid injection pump is supplied from the A liquid tank A via the A liquid supply pump 12 so that an amount equal to the A liquid planned injection amount is discharged from the injection pipe lO in a compressed state. 13 is supplied with the A liquid correction flow rate. If the planned injection amount of A liquid at atmospheric pressure is directly supplied to the A liquid injection pump 13 without performing this correction,
The amount of injection tube 10 that has shrunk is smaller than the planned injection amount of liquid A.
Therefore, the tail void cannot be filled at the required injection rate.

On the other hand, since the B liquid does not contain air, the output of the B liquid planned injection amount output means 7 is inputted to the B liquid supply pump actuator 14, and the B liquid is supplied via the B liquid supply pump 15 under the control of the B liquid supply pump actuator 14. B liquid tank B to B
The planned injection amount of liquid is supplied as is to the B liquid injection pump 16.

The output pipes of the A liquid injection pump 13 and the B liquid injection pump 16 are connected to a mixing nozzle 17, this mixing nozzle 17 is connected to the injection pipe 10, and the corrected injection amount of the two-component mixed backfilling material is input from this injection pipe IO. Inject into the tail void.

A fiffl sensor is provided in the injection pipe IO, and the volume Q of the backfilling material in a pressurized and compressed state is measured by this flow rate sensor.

The volume of backing material Q at atmospheric pressure. is calculated by the correction calculation means 18 based on the above equation (a), and the result is displayed on the monitor display 19.

The control device according to the invention can be realized using a microcomputer or an electronic circuit device.

〔Effect of the invention〕

According to the present invention, when injecting air-containing backing material, ie, "air mortar" into the tail void under pressure, in anticipation of the shrinkage of the volume of the backing material, a large amount of air mortar is added to match the injection pressure. It is possible to supply the backing material to the injection pump and reliably fill the space of the tail void with the contracted backing material at the required injection rate, thereby reliably preventing collapse of the tail void.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram of a control device for a simultaneous automatic injection device for backfilling materials according to the present invention, and FIG. 2 is a block circuit diagram of a preferred embodiment of the present invention. l...Shield excavator 2...Tail void 3.
...Theoretical injection amount output means 4...Planned injection amount output means 5
...Injection rate setting means 6...A? iW planned injection amount output means 7...B liquid planned injection amount output means 8...B liquid mixing ratio setting means 9...A liquid correction flow rate setting means 10...Injection pipe 11...A night Supply pump actuator 12...
A liquid supply pump 13... A liquid injection pump 14...
-B liquid supply pump actuator 15...B liquid supply pump 16...B liquid injection pump 17...Mixing nozzle 18...Correction calculation means 19...Monitor display patent applicant Daimei Telephone Kogyo Co., Ltd. Patent applicant Kosaka Institute Co., Ltd.

Claims (1)

[Scope of Claims] 1. In a control device for an automatic backfilling material simultaneous injection device that backfills air-containing backfilling material into a tail void formed by a shield excavator at the same time as shield propulsion, from an excavation speed sensor of the shield excavator. theoretical injection amount output means for outputting a theoretical injection amount which is an instantaneous theoretical tail void volume value obtained by multiplying the output of , a planned injection amount output means which is the product of the output of the injection rate setting means and the output of the theoretical injection amount output means, and an injection pressure sensor that detects the injection pressure at the injection location with respect to the output of the planned injection amount output means. and a correction flow rate setting means for calculating the flow rate of the backfilling material under the injection pressure based on the output of the backfilling material and the air content signal of the backfilling material measured in advance and converted into an electrical quantity; A control device for an automatic backfilling material simultaneous injection device, characterized in that the discharge amount of a backfilling material injection pump is controlled by the output of the backfilling material injection pump. 2. Discharge liquid A containing air and liquid B without air from their respective injection pumps and mix them.
In a control device for a two-component type automatic backfilling material simultaneous injection device that backfills air-containing backfilling material consisting of two components B into a tail void formed by a shield excavator at the same time as shield propulsion, an excavation speed sensor of the shield excavator is provided. theoretical injection amount output means for outputting the theoretical injection amount which is the instantaneous theoretical tail void volume value of the product of the output from the tail void and the known tail void area; and injection rate setting means for setting the injection rate of the backfilling material using a switch on the operation panel. and a planned injection amount output means for the product of the output of the injection rate setting means and the theoretical injection amount output means, and a planned injection amount of B liquid from the output of the planned injection amount output means and a preset B liquid mixing ratio. A planned injection amount output means for A liquid that outputs a planned injection amount of A liquid from the output of the planned injection amount output means and the preset B liquid mixing ratio; The injection pressure is determined based on the output from the liquid planned injection amount output means, the output from the injection pressure sensor that detects the injection pressure at the injection location, and the air content signal of the backfilling material, which has been measured in advance and converted into an electrical quantity. a liquid A correction flow rate setting means for calculating the flow rate of liquid A below; controlling the discharge amount of the liquid A injection pump by the output of the liquid A correction flow rate setting means; and the output of the liquid B planned injection amount output means. A control device for a two-component backfilling material simultaneous automatic injection device, characterized in that the discharge amount of a B liquid injection pump is controlled by: