JPS62184308A - Deposit thickness measuring instrument for tank bottom deposit - Google Patents

Abstract

PURPOSE:To measure the thickness of deposits accurately in safety without being affected by a flow even during water intake operation by providing a manometer on an underwater self-running car capable of running on the deposits, and detecting the depth from the surface of water to the manometer and measuring the thickness of the deposits. CONSTITUTION:The underwater self-running car 3 is provided with the manometer 8 and a water gauge 9 is provided on the upper edge of an intake tank 7; and a cable 11 for control is connected between an underwater running sand discharging device 1 and a controller 10 provided on the ground to supply a control command signal from the controller 10 to the underwater running sand discharging device 1 and also transmit data from the manometer 8 to the controller 10. The controller 10 is equipped with an arithmetic unit 12 and data from the manometer 8 and water gauge 9 are converted by an analog-digital converting circuit 13 and supplied to the arithmetic unit 12. The known depth HD of the water intake tank 7, the installation height HM of the manometer 8 provided on the underwater self-running car 3, and the water level H1 measured by the water gauge 9, and the depth H2 from the water surface to the manometer 8 are operated to measure the deposit thickness Hs of the deposits 2 by computation.

Description

[Detailed description of the invention] (Industrial use!?) The present invention is a method for measuring the thickness of sediment such as sand and mud deposited on the bottom of a water intake tank. This relates to a measuring device.

(Prior Art) Nuclear and thermal power plants are generally built along coastlines and generate electricity from membranes! The cooling water required for In is dependent on seawater. This cooling water is made from supernatant seawater that has been allowed to settle in a sand tank.

For this reason, coarse materials such as sand, mud, shellfish, and inflow sleepers are deposited on the bottom of the water intake tank. Particularly, after the sea becomes rough due to the passage of a typhoon, etc., a large amount of sand, etc. tends to accumulate, so it is necessary to appropriately remove the sand, etc. accumulated at the bottom of the water intake tank. Therefore, in order to properly remove this sand, etc., it is necessary to detect the accumulated thickness of the sand, etc.

The conventional method for detecting the accumulated thickness of sediment such as sand is to float a boat on the water surface of a water intake tank, and a person on board the boat manually climbs down with a weight or a pole to measure the depth of the water. Alternatively, all water depths are determined using an ultrasonic Δ11 depth machine mounted on a boat, and the sediment thickness is detected from this water depth, the water level from the rim of the water intake tank to the water surface, and the known depth of the water intake tank.

(The problem that 1995 Ming attempts to solve) By the way, in the above-mentioned method of determining the water depth with a boat floating on the water surface of the water intake tank, first of all, when cooling water is taken from the water intake tank, the boat is likely to be washed away, which is dangerous. In addition, there is a problem that the weight and rod cannot be lowered vertically due to the flow, resulting in inaccurate measurements. Another problem is that it is not possible to continuously measure the thickness of deposits such as sand over the entire area of the water intake tank.

An object of the present invention is to solve the problems of the conventional sediment thickness measurement method described above, and to provide a tank bottom sedimentation method that can safely and accurately measure the sediment thickness, and can also continuously measure the sediment thickness. An object of the present invention is to provide a device for measuring the thickness of deposits on objects.

(Means for Solving the Problem) In order to achieve the above object, the device for determining the deposition thickness ΔIII of tank bottom sediment of the present invention is applied to an underwater self-propelled vehicle that can run on the sediment deposited on the bottom of an aquarium. A pressure gauge is provided to detect the depth from the water surface to the pressure gauge, and a water level gauge is provided at the upper edge of the water tank to detect the water level from the upper edge to the water surface. The data, the known depth of the water tank, and the installation height of the pressure gauge provided on the underwater self-propelled vehicle are calculated by a calculation device to calculate the accumulated thickness of the sediment A1.
11.

(Function) A pressure gauge is installed on a submersible self-propelled vehicle that can run on sediment to detect the depth from the water surface to the pressure gauge and measure the ttt pile thickness, so even when water is being taken in, it is not affected by the flow. Deposit thickness can be measured safely and accurately without any In addition, it is possible to continuously measure the thickness of sediment over the entire area of the aquarium by driving the underwater self-propelled vehicle.

(Description of Embodiments) Embodiments of the present invention will be described below with reference to Figs. 1 and 2. Fig. 1 shows an embodiment of the tank bottom sediment thickness measuring device of the present invention. 2 is an overall schematic diagram, and FIG. 2 is an input/output block circuit diagram of an arithmetic unit used in the device of FIG. 1.

In FIGS. 1 and 2, reference numeral 1 denotes an underwater sand removal device, which is a rake device for collecting coarse materials at the front of a submersible self-propelled vehicle 3 equipped with endless tracks and capable of running on deposits 2. 4
A screw conveying device 5 is installed at the rear of the system to collect accumulated sand, etc. on the left and right sides to the center, and the collected sand, etc. is suctioned and pressurized by an ice sand removal pump (not shown), and a drainage hose 6 is installed. Sand and the like are discharged to the outside of the water tank 7 through the water tank 7. Further, the underwater self-propelled vehicle 3 is provided with a pressure gauge 8. A water level gauge 9 is provided at the upper edge of the water intake tank 7. Furthermore, an underwater traveling sand removal device gt and a control device 1 installed on the ground
A control cable 11 is connected between the control device and the control device!
A control command signal is given from 0 to the underwater traveling sand removal device 1, and data is transmitted from the pressure gauge 8 to the control device 10. The control device IO includes a calculation device 12 and a pressure gauge 8.
The data from the water level gauge 9 is converted by an analog-to-digital conversion circuit 13 and provided to the arithmetic unit 12. This calculation device 12 is given in advance the known depth HD of the water intake tank 7 and the installation height HM of the pressure gauge 8 provided on the underwater self-propelled vehicle 3, and assumes Hl as the water level measured by the water level gauge 9. ,H
2 is the depth from the water surface to the pressure gauge 8, the accumulation thickness Hs of the deposit 2 is calculated and measured by calculating the following equation (1).

Hs = HD −Hl −H2−HM −・
(1) Then, this deposition thickness Hs is given to the display device 14.

In this configuration, even if there is a flow on the water surface of the water intake tank 7 during water intake, the underwater traveling sand removal device Wll is not affected by the water flow and the pressure gauge 8 accurately measures the depth H2 from the water surface to the pressure gauge 8. can safely and accurately measure the deposition thickness Hs of deposit 2.
can be measured. Moreover, the underwater traveling sand removal device l water intake tank 7
By running the device over the entire area, the accumulated thickness of the sediment 2 in the entire area of the water intake tank 7 can be measured continuously.

3 and 4 show other embodiments of the device for measuring the thickness of tank bottom sediment according to the present invention. FIG. 3 is an overall schematic diagram of another embodiment of the device for measuring the deposition thickness of tank bottom sediment according to the present invention, and FIG. 4 is an input/output block circuit diagram of the arithmetic unit used in the device of FIG. 3. It is. In FIGS. 3 and 4, the same members as those in FIGS. 1 and 2 are given the same reference numerals, and redundant explanations will be omitted.

3 and 4, the difference from FIGS. 1 and 2 is that the underwater self-propelled vehicle 3 is provided with a pressure gauge 8 and an inclinometer 15, and the calculation device 12 is equipped with a pressure gauge 8, a water level gauge 9, and a pressure gauge 8. The reason is that the data of the inclinometer 15 is given respectively. Then, the accumulation thicknesses Hsl and Hs2 of the front and rear edges of the underwater traveling sand removal device 1 when the upper surface of the sediment 2 such as sand is inclined.
The goal is to measure each.

The calculation device 12 includes a pressure gauge 8, a water level gauge 9, and an inclinometer 1.
5 is converted by an analog-to-digital conversion circuit 13 and provided. This computing device 12 calculates the leading edge deposition thickness H3.
1 and the trailing edge deposition thickness Hs2 are calculated and measured using the following equations (2) and (3) and are provided to the display device 14.

Hsl=HD-Hl-H2-HMcosO±Lls
irl...(2) Hs2=HD -Hl -H2-HMcosO±L2s
irl...(3) However, Ll is from the pressure gauge 8 to the underwater traveling sand removal bag 2! L2 is the distance from the pressure gauge 8 to the rear edge. Also, if the slope is uphill, the fifth term in equation (2) is positive and the fifth term in equation (3) is negative; if the slope is downhill, the fifth term in equation (2) is negative and ( 3) The fifth rule of equation is positive.

In this way, the pressure gauge 8 and the inclinometer 15 are attached to the underwater self-propelled vehicle 3.
By providing this, it is possible to measure the accumulation thicknesses Hsl and Hs2 at the front and rear edges of the underwater traveling sand removal device l, respectively, to detect the accumulation status of the sediment 2 more precisely, and to perform sand removal work safely and reliably. .

In the embodiment, the data from the pressure gauge 8, water level gauge 9, and inclinometer 15 are provided to the arithmetic unit 12 via the analog-to-digital converter 13, but this is not a limitation. Of course, it is sufficient that the measurement can be carried out by calculation, and the measurement results may be displayed by any means.

Furthermore, the apparatus for measuring the sediment thickness of tank bottom sediment according to the present invention is not limited to measuring the sediment thickness of the water intake tank 7, but can also be applied to sedimentation basins of water supply facilities, sedimentation basins of sewage facilities, and general pumping and drainage. It is useful for measuring the thickness of sediment in water intake tanks at pump stations.

(Effect of the invention) As explained above, the deposition thickness 11 of the tank bottom sediment of the present invention
According to this system, a pressure gauge is installed on a submersible self-propelled vehicle that can run on sediment, and the depth from the water surface to the pressure gauge is detected to measure the sediment thickness, so even when water is being taken in, it can be easily moved by the flow. Deposition thickness can be measured safely and accurately without being affected. Moreover, the excellent effect of being able to continuously measure the thickness of deposits throughout the tank by driving the underwater self-propelled vehicle is achieved.

[Brief explanation of drawings]

FIG. 1 is an overall schematic diagram of an embodiment of the tank bottom sediment deposition thickness measuring device of the present invention, and FIG. 2 is an input/output block circuit diagram of an arithmetic unit used in the device shown in FIG. Yes, 3rd
The figure is an overall schematic diagram of another embodiment of the device for measuring the deposition thickness of tank bottom sediment according to the present invention, and FIG. 4 is an input/output block circuit diagram of the arithmetic unit used in the device of FIG. 3. . 2: Sediment, 3: Underwater self-propelled vehicle, 7: Water intake tank, 8: Pressure gauge, 9: Water level gauge, 12: Arithmetic device. Patent applicant: Chubu Electric Power Co., Ltd. Dengyosha Machinery Works Co., Ltd.

Claims (1)

[Claims] A submersible self-propelled vehicle that can run on the sediment accumulated on the bottom of the tank is equipped with a pressure gauge to detect the depth from the water surface to the pressure gauge, and a water level gauge is installed at the upper edge of the tank to detect the depth from the water surface to the pressure gauge. Detecting the water level from to the water surface, and calculating the data of the pressure gauge and water level gauge, the known depth of the water tank, and the installation height of the pressure gauge provided on the underwater self-propelled vehicle using a calculation device. A device for measuring the deposition thickness of tank bottom sediment, characterized in that the device is configured to measure the deposition thickness of the sediment.