JPH07104253B2 - Stabilizer automatic measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention automatically measures the viscosity and specific gravity of a stabilizing liquid used for stabilizing a groove wall when constructing a continuous underground wall, a cast-in-place pile, or the like. The present invention relates to a stable liquid automatic measuring device that is made possible.

[Prior Art] When constructing a continuous underground wall or the like, a polymer-based or bentonite-based stabilizing solution is filled in the groove surrounded by the underground wall to press the wall surface so that the groove wall does not collapse. In order to prevent the groove wall from collapsing, the funnel viscosity, specific gravity, sand content, PH, liquid temperature, etc. of the stabilizing liquid must be the specified values, and their management is necessary during the construction work. Conventionally, when stabilizing liquids are managed, manual measurement is performed using dedicated test equipment suitable for each measurement purpose. Was there.
For example, when measuring viscosity, close the lower end outlet of a single funnel viscometer container with a finger, inject 500 cc of stable solution weighed in another container into the same container, remove the finger from the outlet and remove the inside of the container. A stopwatch was used to measure the time required for the stabilizing solution to flow out. The specific gravity of the stabilizing solution was measured by floating a hydrometer on the surface of the stabilizing solution contained in a separate container.

[Problems to be Solved by the Invention] In the conventional measurement of the stabilizing solution, the viscosity and the specific gravity are measured by using separate instruments, and the stabilizing solution is manually discharged.
Since it takes time and labor to perform the measurement, such as manually operating the densitometer, the measurement frequency is limited and a measurement error is likely to occur, and it is not possible to perform precise quality control of the stabilizing liquid that affects the stability of the groove wall.

Incidentally, recently, an apparatus for automatically measuring a part of several kinds of measured values has been proposed, but it is still unsatisfactory because it is still time-consuming to manage and control the stable liquid, and is large and expensive.

Therefore, the present invention enables labor saving of stable liquid management, reduction of measurement error, and rapid response to changes in stable liquid properties by automating the stable liquid management test, in order to secure groove wall stability. The purpose is to perform detailed management, and at the same time, to reduce the size of the device and reduce the cost.

[Means for Solving the Problems] The stabilizing solution automatic measuring device of the present invention comprises a funnel-shaped viscometer container for detecting the outflow time of a predetermined amount of the stabilizing solution used for stabilizing the groove wall, and the suspension load thereof. In addition to providing a load cell for measuring, the viscometer container is provided with a sensor for detecting whether or not the stabilizing solution is in an outflow state at the outlet. A control device having a computer for receiving the load signal from the load cell to measure the specific gravity of the stabilizing solution and for measuring the outflow time corresponding to the viscosity of the stabilizing solution by receiving the detection signal of the sensor is provided. Further, the computer has an arithmetic unit that compares the specific gravity with the outflow time within a reference value, and outputs an output signal to an alarm device when the viscosity or specific gravity of the stabilizing solution is outside the reference value. It is characterized in that it is configured as follows.

Measurement values based on various signals input to the control device can be input to the central monitoring device so that the specific gravity of the stabilizing solution can be easily monitored. Further, by connecting a PH sensor of stable liquid and a liquid temperature sensor to the control device, it is possible to cause the alarm device to output an output signal when the PH or temperature of the stable liquid is other than the reference value.

[Operation] In the above-described stabilizing liquid automatic measuring device, when a certain amount of stabilizing liquid flows out from the viscometer container, the sensor detects the beginning and end of the flowing out, so the control device determines the outflow time corresponding to the viscosity. It can be measured automatically.

In addition, in order to add a certain amount of stabilizing solution to the viscometer container, an electrode is provided at a position where a certain amount of stabilizing solution is contained, and the pump for injecting the stabilizing solution into the container is stopped by the signal from the electrode. .

In addition, since the viscometer container is equipped with a load cell that measures the suspension load, a state in which a certain amount (for example, 500 cc) of stabilizing liquid is contained in the container (load W) and a state in which the stabilizing liquid flows out and becomes empty The detection signal at (load W ₀ ) is input to the control device. Then, in the control device, the specific gravity is calculated by dividing the weight (W−W ₀ ) of the stabilizing solution by its capacity (500 cc).

As described above, the outflow time and the specific gravity corresponding to the viscosity of the stable solution are automatically detected, and the property of the stable solution can be easily controlled by the central monitoring device to which the detected values are sent.

[Embodiment] An embodiment of the present invention will be described with reference to FIGS.

At the time of construction of the continuous underground wall 1, for stabilizing the groove wall, a polymer or bentonite stabilizer 2 is injected into the groove 3 so that the groove wall does not collapse. The stabilizing solution 2 must have a predetermined viscosity, specific gravity, etc., and therefore, the stabilizing solution 2 is sucked up into the stabilizing solution circulation tank 5 through the pipe line 4 and the property is measured by the stabilizing solution measuring device A to obtain a predetermined value. The property-stabilized liquid can be injected into the groove 3 through the conduit 6.

A pedestal 7 is provided on the stabilizing solution circulation tank 5 via a level screw 7a, and the funnel viscometer container 8 of the stabilizing solution measuring device A is passed from an arm portion 7b of the pedestal 7 via a support material 9a and a plate 9b. Be hung. The funnel viscometer container 8 has a funnel shape, and the stabilizing solution is injected from the upper part thereof through the pipe line 10. That is, a pump 11 is provided in the middle of the pipe line 10, and the stable liquid can be injected into the funnel viscometer container 8 from the stable liquid circulation tank 5 via the electromagnetic valve 12 and the pipe line 13 provided at the other end of the pipe line 10. It is like this.

An electrode 14 is provided in the funnel viscometer container 8 at a water level at which a predetermined amount of stabilizing liquid (for example, 500 cc) is provided, and when a predetermined amount of stabilizing liquid is injected, a pump 11 is generated by a signal from the electrode 14.
The drive of is automatically stopped by the control device described later. Also, funnel viscometer container 8
A water shutoff valve 15 is provided at the lower end outlet 8a of the container and is closed when a predetermined amount of stabilizing solution is put into the container. At the outlet 8a, a sensor that detects the state in which the water stop valve 15 is opened and the stable liquid is flowing out and the state in which the liquid has finished flowing out.
16 is provided, and the detection signal thereof is input to the control device B via the control panel 17 and the cable 18.

The control device B is equipped with a computer,
The signal from the sensor 16 allows the timer of the computer to measure the outflow time corresponding to the viscosity of the stabilizing solution. The opening / closing of the water shutoff valve 15 can be controlled by the control device B.

A conduit 19 is connected to the electromagnetic valve 12 separately from the conduit 13. The conduit 19 is connected to a fresh water source, and when the inside of the funnel viscometer container 8 is washed, the electromagnetic valve 12 is switched to clean it with fresh water. You can do it.

The load cell 20 is interposed between the support material 9a of the funnel viscometer container 8 and the arm portion 7b of the gantry, and the funnel viscometer container 8 is provided.
Is empty (load W ₀ ) and a certain amount of stabilizing liquid (eg 500c
c) The load signal in the inserted state (load W) is input to the control device B. The computer of the control device B (for example, one equipped with a 16-bit A / D converter) calculates the weight (W-W ₀ ) of the stabilizing solution by the input signal and divides it by the volume (500cc) to detect the specific gravity. You can do it. Since the weight of the empty funnel viscometer container 8 is measured every time the specific gravity is measured, there is no fear of drift.

The computer of the control device B has an operation part for comparing the outflow time corresponding to the detected viscosity of the stabilizing solution and whether or not the specific gravity is within the standard value. For example, it outputs an output signal to the alarm device 22 via the communication cable 21. As the alarm device 22, a red rotation display type device, an alarm buzzer, or the like can be used. Further, the control device B can control each device so that the detection is performed at regular intervals. Further, the control device B can display the outflow time corresponding to the viscosity and the detected value of the specific gravity on the liquid crystal display 23, and can print the detected value by the attached printer 24.

The stabilizing solution circulation tank 5 is provided with a PH sensor 25 and a liquid temperature sensor 26, and their detection signals are also input to the control device B. The detected values are compared with the reference value by the control device B, and when the detected value is outside the reference value, an output signal is issued to the alarm device 22 as in the case of detecting the outflow time corresponding to the viscosity. The control device B is provided with a set value input key 27 so that the reference value for each property can be changed. Further, each detection signal of the control device B is
It is connected to a central monitoring device C such as a personal computer via a cable 29 provided with a converter 28. The central monitoring device C can monitor a plurality of measurement positions with a microcomputer having a serial communication function.

Next, the process of measuring the properties of the stabilizing solution with the stabilizing solution automatic measuring device having the above-described configuration will be described with reference to the flowchart of FIG.

First, the weight (W ₀ ) in the empty state of the funnel viscometer container 8 is measured by the load cell 20, and then it is confirmed that the water shutoff valve 15 is closed and the electromagnetic valve 12 is switched to the stable liquid side. Here, the pump 11 is driven to drive the funnel viscometer container 8
The stabilizing solution is injected into the inside, and the discharge amount is gradually reduced based on the signal from the load cell 20, and the electrode 14 is activated at the injection position of 500 cc to stop the pump 11. The weight (W) of the funnel viscometer container 8 containing the stabilizing solution is input to the control device B by the load cell 20, and the weight (W-W ₀ ) of the stabilizing solution is calculated there, and further the volume (500cc ), The specific gravity of the stabilizing solution is detected.

Next, to detect the outflow time corresponding to the viscosity of the stabilizing solution,
When the water stop valve 15 is opened to allow the stabilizing solution to flow out, the sensor 16 sends a signal to the control device B indicating that a predetermined amount of the stabilizing solution in the container has flowed out and the state in which the flow has ended, where the viscosity is The outflow time corresponding to is measured.

Detection signals from the PH sensor 25 and the liquid temperature sensor 26 are also input to the control device B. Then, the control device B displays the above-mentioned four kinds of detection values on the liquid crystal and prints them, and further inputs each detection signal to the central monitoring device C. In the control device B, it is compared whether each detection signal is within the reference value, and if it is outside the reference value, the alarm device 22
Emit an output signal to.

When the detection of each measured value of the first stabilizing solution is completed, the inside of the funnel viscometer container 8 is washed so that the next detection can be performed accurately. Therefore, when the water shutoff valve 15 is closed, the electromagnetic valve 12 is switched, and the pump 11 is driven, 500 cc of fresh water is injected into the funnel viscometer container 8, and when the signal from the electrode 14 is input to the control device B, the pump 11 is turned on. When the water is stopped, the water shutoff valve 15 is opened and the washing water is discharged. When the drainage from the funnel viscometer container 8 is completed, the control device B closes the water shutoff valve based on the signal from the sensor provided in the lower part of the container. After this, at the next measurement time, the stabilizing solution is again injected into the funnel viscometer container 8 as described above, and various measured values are detected.

EFFECTS OF THE INVENTION According to the present invention, the control device can automatically measure the outflow time corresponding to the viscosity of the stable liquid in the viscometer container, the specific gravity, etc. in a short time and with high accuracy, so that the measurement frequency can be increased. It can be set arbitrarily, and the quality of the stable solution can be precisely controlled. In addition, the whole device is small and easy to move, and because it is inexpensive, a large number of measurement points can be obtained, and since the central monitoring device has a serial communication function, central monitoring is performed with a large number of measuring devices. It is possible to build a system.

Furthermore, since clean water can be automatically passed through the funnel viscometer container, pump, valve, etc., there is no risk of clogging.

[Brief description of drawings]

FIG. 1 is a side view of a main part of an automatic stabilizer measuring apparatus of the present invention, FIG. 2 is an overall system diagram of the apparatus, and FIG. 3 is a flow chart showing the operation of the apparatus. 2; Stabilizer, 5; Stabilizer circulation tank, 8; Funnel viscometer container 11; Pump, 12; Electromagnetic valve, 14; Electrode 15; Water stop valve, 16; Sensor, 20; Load cell 22; Alarm device, 25; PH sensor, 26; Liquid temperature sensor A; Stabilizer measuring device, B; Control device, C; Central monitoring device

Claims (3)

[Claims] 1. A funnel-type viscometer container for detecting the outflow time of a predetermined amount of a stabilizing liquid used for stabilizing a groove wall is provided with a load cell for measuring the suspension load, and an outlet of the viscometer container. A sensor for detecting whether the stable liquid is in the outflow state is provided, the specific gravity of the stable liquid is measured by receiving the load signal from the load cell, and the outflow corresponding to the viscosity of the stable liquid is received by receiving the detection signal of the sensor. A control device having a computer for measuring time is provided, and the computer has an arithmetic unit for comparing whether the specific gravity and the outflow time are within a reference value, and the viscosity or the specific gravity of the stabilizing solution is other than the reference value. An automatic stabilizing liquid measuring device, characterized in that it is constructed so as to sometimes output an output signal to an alarm device. 2. The stable liquid automatic measuring device according to claim 1, wherein measured values based on various signals input to the control device are input to the central monitoring device. 3. A PH device and a liquid temperature sensor for stabilizing liquid are connected to the control device, and an output signal is issued to an alarm device when the PH or temperature of the stabilizing liquid is other than a reference value. Item 2. The stable liquid automatic measuring device according to Item 1 or 2.