JPH0760112B2 - In-vehicle continuous material drawing device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an on-vehicle continuous material drawing apparatus used for road paving, soil improvement, airfield construction, and the like.

[Prior Art] Conventionally, for example, in the case of concrete pavement for roads, although not shown, an on-vehicle type concrete mixing device is used, and the vehicle can be moved as the pavement progresses. The vehicle is loaded with aggregate such as gravel, cement, water, etc., which is kneaded in a mixer installed in the vehicle, and the kneaded mixture is transported to the paving site by another vehicle and paved. Used for. In this case, the respective materials to be kneaded are drawn out from the hoppers, tanks, etc. on the respective vehicles, and at the time of drawing out, the weighing is performed. In such a case, generally, a vehicle has a very small space such as a stationary plant, and therefore, a weighing device of a simple type is used. And most of them mechanically detect the withdrawal speed of those materials and multiply that value by the specific gravity of the material,
The withdrawal amount of the material is used.

[Problems to be Solved by the Invention] However, in the case of the above-mentioned material drawing, since the change of the specific gravity of the material or the change of the actual drawing amount is not taken into consideration, it is not a stable measured value continuously, and it is instantaneous. Has a large fluctuation, and its measurement accuracy is poor. In particular, agglomerates easily cause a bridging phenomenon and are a little difficult to weigh compared to powders and fluids, but there is little space on the vehicle, and there is room to install a large-scale and precise measuring device as in the case of a stationary plant. There is no.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an on-vehicle continuous material drawing device having a higher weighing accuracy than the above-mentioned conventional device. Another object of the present invention is to provide the above-mentioned drawer device which can accurately and continuously measure the weight of the lump in an on-vehicle continuous material drawer device having a small space.

[Means for Solving the Problems] The present invention which achieves the above-mentioned object is described as follows. It is a vehicle loaded with three different types of lumps, powders, and water; lump storage tanks. And a lump extraction device provided in correspondence therewith; a powder withdrawal device having a powder storage tank and a powder weight scale provided in correspondence therewith; a water storage tank provided in correspondence therewith, Water withdrawing device having water scale; Mixer for kneading lumps, powder and water provided from each of the withdrawing devices; Mixer drawer having a mixture weigher for weighing the mixture, provided after the mixer A device; a computer controller connected to each of the powder scale, the water scale, and the mixture scale; and each of the drawing devices,
The computerized control device that is controllably connected; the mass withdrawing device, the powder withdrawing device, the setting device for setting an appropriate value withdrawn from the water withdrawing device within a unit time, and a storage device for storing the setting value The computerized control device; compares the respective appropriate withdrawal amounts of the powder and water with the respective values provided from the respective withdrawal devices of the powder and water, and applies them to the respective withdrawing devices so as to reduce the difference between them. The computer control device having a comparison device for outputting; comparing the value provided by the mixture weighing scale and the sum of the values provided by the powder and water weighing scales, and pulling out the agglomerates so as to reduce the difference. It is an on-vehicle continuous material drawing device comprising the computerized control device having a comparison device for outputting to the device; a vehicle on which the various devices are loaded.

[Operation] First, an appropriate amount of each of the lumps, powder and water per unit time is set and stored in the storage device of the computer control device. Next, when this device is operated, the lumps, powder and water are drawn out from the respective drawing devices and are respectively put into a mixer and kneading is performed.

The kneaded mixture is drawn out by a mixture drawing device and used. And at that time, each weight is continuously measured in the powder withdrawing device and the water withdrawing device, and this value is sent to the computer control device, and in the computer control device, the powder and water are withdrawn. Comparison with the value of the appropriate amount per unit time is being made every moment, and in order to reduce the difference between them, it is output from the same computer control device to the powder withdrawing device and the water withdrawing device, and feedback is provided. Done.

As a result, the powder and water are always drawn in an amount close to the proper amount.

Along with that, the mixture weighing machine provided in the mixture withdrawing device provided in the latter stage of the mixer also outputs the value of the weight of the kneaded mixture to the computer controller,
And, as described above, the continuous withdrawal weights of the powder and water are input momentarily into the computer control device,
The comparison between the sum of the two weights and the value provided by the mixture weight scale is performed by a comparison device provided in the computer controller. The value of the difference obtained here is the momentary weight of the supplied lumps. Then, another comparison device compares the weight of the lump with the set appropriate amount of the lump, thereby reducing the difference from the computer controller to the lump. Output is performed to the drawer device and feedback is performed.

In this way, the withdrawal close to the proper value for each of the lump, the powder, and the water is continuously performed.

[Embodiment] In FIG. 1, reference numeral 1 denotes a vehicle, which is towed by a trailer or the like (not shown). The following various devices are provided on the vehicle 1. 2 is a lump body storage tank, and gravel is used as a lump body as an example. Reference numeral 3 denotes a block drawing device provided corresponding to the storage tank, and a belt conveyor was used as an example. Four
Is a motor for driving the device 3. Further, 5 is a powder storage tank, and as an example of powder, cement is used.
6 is a powder withdrawing device provided corresponding to the storage tank 5, and a belt conveyor is used as an example.

A motor 7 drives the device 6. Reference numeral 8 denotes a powder weight scale provided in the powder drawing device 6, and shows a load cell sensor provided in the belt conveyor as an example.
Next, 9 is a water storage tank, and 10 is a water drawing device provided corresponding to this, and a pump was used as an example. Reference numeral 11 is a motor provided in the same device 10, and 12 is a weight scale of water, and a flow meter was used as an example.

Next, 13 is a mixer, which is provided so as to communicate with each of the drawing devices 3, 6, and 10.

Reference numeral 14 denotes a motor for operating the mixer 13. 15 is the mixer
A drawing device for the mixed material kneaded in the mixer 13, which is provided in the subsequent stage of the mixer 13, and is formed by a belt conveyor as an example. Reference numeral 16 denotes a drive motor of the drawer, and 17 denotes a mixture weight scale for measuring the weight of the mixture. The powder weight scale 8, the water weight scale 12, and the mixture weight scale 17 are all connected to a computer controller 18,
The respective momentary values of the powder, water, and mixture withdrawn are output to the computer controller 18, respectively.

In the mixer 13, for example, gravel, cement, and water are kneaded.

Next, the agglomerate drawing device 3, the powder drawing device 6, the water drawing device 10, and the mixture drawing device 15 are respectively connected to the computer control device 18 as shown in the drawing, and the computer control device 18
The output from 18 makes it possible to control the amount of each withdrawal.

Then, the difference between the value provided by the mixture weight scale 17 and the sum of the values provided by the powder weight scale 8 and the water weight scale 12 is calculated every moment in the computer control device 18, and this value is It represents the withdrawal weight of the agglomerate, and the difference between the withdrawal weight of the agglomerate and the appropriate withdrawal amount of the agglomerate per unit time is calculated moment by moment, and the difference is calculated. In order to minimize the above, the computer control device 18 outputs to the lump extracting device 3. In FIG. 1, 19 is an analog amplifier, 20 is an analog-digital converter, 21 is a data reading scanner, 22 is a storage memory, 23 is a control memory, 24 is a data output device, and 25 is a CPU. The second
In the figure, 26 is a hopper, the lower part of which is controlled to open and close. 27 indicates a truck. Also the vehicle 1
Is towed by a towing vehicle (not shown).

[Advantages of the Invention] The present invention is configured as described above, and since the powder and water have almost no congestion during withdrawal and almost complete withdrawal, the calculation of the agglomerate and the withdrawal adjustment based on the two are almost complete. Can be done. Therefore, it is possible to provide an on-vehicle continuous material withdrawing device having a much higher measurement accuracy than the conventional device of the same type. In addition, especially on a vehicle where there is not enough space to install a large-scale weighing device, the weight of a lump that is difficult to measure accurately and continuously can be continuously and accurately measured due to the bridge phenomenon, etc. Withdrawal control can be performed.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a block diagram showing the outline of an on-vehicle continuous material drawing device, and FIG. 2 is a front view of the same device. 1 ... Vehicle 2 ... Mass storage tank 3 ... Mass extraction device 5 ... Powder storage tank 6 ... Powder extraction device 8 ... Powder weight scale 9 ... Water storage tank 10 ... Water extraction device 12 …… Water scale 13 …… Mixer 15 …… Mixture withdrawal device 17 …… Mixture scale 18 …… Computer controller

Claims (1)

[Claims] 1. A vehicle loaded with three different types of lumps, powders, and water; lump storage tanks and lump drawing devices provided corresponding thereto; powder storage tanks. A powder withdrawing device having a powder weight scale provided in correspondence therewith;
A water withdrawing device having a water storage tank and a water scale, which is provided correspondingly; a mixer for kneading the lumps, powder, and water brought from each of the withdrawing devices; provided at a stage subsequent to the mixer A mixer with a mixture scale for weighing the mixture; a computer controller connected to each of the powder scale, water scale, and mixture scale; and a computer controllably connected to each of the extractors Control device; the lump extraction device, the powder extraction device, the setting device for setting appropriate values to be extracted from the water extraction device within a unit time, and the storage device for storing the setting device; And a proper amount of water to be withdrawn, and a respective device for comparing the respective values brought from the powder and water withdrawing devices, and outputting to each withdrawing device so as to reduce the difference between them. Computer controller for comparing the value provided by the mixture weighing scale and the sum of the values provided by the powder and water weighing scales, and outputting to the lump extracting device so as to reduce the difference. An on-vehicle continuous material withdrawing device comprising: the computer controller having the above; a vehicle on which the above devices are loaded.