JPH0562823U - Pipe conveyor type weighing device - Google Patents

Abstract

(57) [Summary] [Purpose] The object to be weighed is moved in any direction by a pipe conveyor. [Structure] A supply amount adjusting device 12 is attached to a hopper 11, and a plurality of pedestals 13 are provided below it. A weighing base is hung on the gantry 13 by a suspension line with a load cell interposed, and a pipe conveyor body 14 is placed on the pedestal. A belt 21 is passed through the inside of the pipe conveyor body 14 so that the pipe 20 moves in close contact with the inner diameter of the pipe 20. The belt 21 is rotated by a pulley 23 driven by a driving device 22, and the outer belt 21 is moved.
Moves on the return roller 24 under the pipe 20.

Description

[Detailed description of the device] [Industrial applications]

 The present invention relates to a pipe-conveyor-type weighing device used to carry out weighing at the same time as transporting powdered or granular material such as imported grain.

[Prior Art]

 Conventionally, an entire apparatus for transporting and weighing imported grains and the like lifts a grain C in a vessel 1 to the outside of the vessel by an unloader 2 and places it on a conveyor 3 to transport a long distance, as shown in FIG. The elevator 4 lifts it to a height of about 10 to 20 m and supplies it to the hopper 5. The objects C to be weighed in the hopper 5 are weighed in a batch manner by a hopper scale 6 provided below the hopper 5, and further conveyed by a conveyor 7 and stored in a silo 8. Alternatively, as a weighing mechanism that does not use the hopper scale 6, there is known a chain conveyor in which a metal or hard synthetic resin chain is arranged in a horizontally moving rectangular metal case. Is suspended from a pedestal via load cells at multiple points to measure the grain on the chain conveyor.

[Problems to be solved by the device]

 However, in the above-mentioned hopper scale method, the object to be weighed C must be transported to a high place. Further, the volume of the hopper 5 is required to be three times or more of the batch volume to be weighed from the viewpoint of accuracy, and the equipment is enlarged to have less flexibility as a whole. Also, the chain conveyor can only be arranged in a straight line from the structural point of view, and direction change is impossible. Furthermore, the chain conveyor has a disadvantage that the weight of the chain is much heavier than the objects to be weighed, the weighing accuracy is poor, and the equipment cost is high. An object of the present invention is to solve the above-mentioned problems and to provide a pipe conveyor type weighing device capable of performing weighing by a relatively inexpensive device without using a hopper and a chain conveyor.

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a pipe conveyor type weighing device according to the present invention is provided with a load cell that conveys an entire conveyor that carries an object to be weighed on a belt that closely moves in a semi-circular shape inside the pipe. It is characterized by being supported by.

[Action]

 The pipe-conveyor-type weighing device having the above-described configuration directly or linearly connects predetermined two places with a pipe conveyor to transport an object to be weighed and weigh it.

【Example】

 The present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 is a side view of the present embodiment, the length of which is reduced. 2 is a sectional view taken along the line AA of FIG. A slide gate type or rotary gate type feed amount adjusting device 12 for adjusting the flow rate of the object to be weighed is provided below the hopper 11, and a pipe supported by a plurality of pedestals 13 is provided below the supply amount adjusting device 12. A conveyor body 14 is provided. As shown in FIG. 2, the pipe conveyor main body 14 is placed on a weighing base 17 suspended by two suspension lines 16 and 16 each having a load cell 15 in the pedestal 13, and the pipe 13 is attached to the pedestal 13. A weight mount 18 for calibration and a steady rest 19 are provided. As shown in the cross-sectional view of FIG. 3, the pipe conveyor main body 14 is composed of a metal pipe 20 and a belt 21 made of rubber or the like that moves in one round while contacting the inner lower surface of the pipe in a semi-arc cross section. A pulley 23 driven by a device 22 moves in the pipe 20. Further, the belt 21 has a semi-arc shape along the inner diameter inside the pipe 20, but becomes flat along the pulley 23 outside the pipe 20 and moves on the return roller 24 outside the pipe 20. The loads of the pipe conveyor body 14, pulley 23, return roller 24, etc. are all transmitted to the load cell 15. The output of the load cell 15 provided on each pedestal 13 is connected to the adder 25 as shown in FIG. 4, and the output of the adder 25 is connected to the adjuster 26. When the value measured by each load cell 15 is input to the adder 25, the value of each load cell 15 is added and the value is input to the adjuster 26 as the addition signal M. On the other hand, the pulley 23 is provided with a speed detector 27 for detecting the moving speed of the belt 21, the output of which is input to the adjuster 26 to control the drive device 22. When batch-type weighing is performed with such a configuration, as shown in FIG. 5, first, the regulator 26 is set so as to weigh, for example, 95% of the batch weighing set value as the large input period. The object S to be weighed is continuously fed to the moving belt 21 by the supply amount adjusting device 12, and the belt 21 is stopped by the instruction of the regulator 26 when the measured value by the load cell 15 reaches 95%. Then, while the belt 21 is stopped, the supply amount adjusting device 12 is controlled so that the remaining 5% is dispensed as a small injection period, and when the measured set value becomes 100%, the supply amount adjusting device 12 is set. Stops the supply, and the belt 21 restarts to discharge the object S to be weighed. When it is confirmed that the object S to be weighed has been discharged and the output of the load cell 15 has become 0, the supply amount adjusting device 12 starts the supply of the next object S to be weighed as shown in (b). Further, when performing continuous measurement, the supply amount adjusting device 12 is set to be fully opened or a constant opening degree, the object S to be measured is continuously supplied, and the signal N proportional to the speed by the speed detector 27 is continuously supplied. And the sum signal M of the measured values are calculated to continuously measure the object S to be measured. As described above, in the present embodiment, since the object to be weighed is loaded on the belt 21 that moves in the pipe 20 in the shape of a semi-arc, the degree of freedom in the shape of the pipe conveyor main body 14 is increased. Not only the linear arrangement as shown in Fig. 6 (a), but also the convex arrangement as shown in Fig. 6 (b), for example, avoiding obstacles on the ground and circumvented, is possible, and Fig. 6 (c). As shown in), it is also possible to make a concave arrangement through the underground. Further, as shown in FIG. 7, the inlet portion 14a or the outlet portion 14b of the pipe conveyor main body 14 can be bent arbitrarily to select an input point or an output point. In this case, the bent portion of the pipe 20 may be connected by a flexible tube.

[Effect of the device]

 As described above, in the pipe conveyor type weighing device according to the present invention, the belt is moved in close contact with the pipe in a semi-arc shape, so that the objects to be weighed are less likely to remain in the pipe, and the inclined, horizontal, left and right It is possible to freely change the direction such as twisting, and it is possible to greatly relax the restrictions on the arrangement. In addition, the measurement accuracy is good, the facility cost is low due to the structure, and the noise and driving power are low.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view.

FIG. 4 is a block diagram of a weighing device.

FIG. 5 is an explanatory diagram of a weighing method.

FIG. 6 is a side view of a modified example.

FIG. 7 is a plan view of a case where an inlet portion and an outlet portion are bent.

FIG. 8 is a layout diagram of a conventional example.

[Explanation of symbols]

 11 Hopper 12 Supply Adjusting Device 13 Stand 14 Pipe Conveyor Main Body 15 Load Cell 20 Pipe 21 Belt

Claims (3)

[Scope of utility model registration request] 1. A pipe-conveyor-type weighing device, wherein a load cell supports an entire conveyor for carrying and transporting an object to be weighed on a belt that moves closely in a semicircular arc in a pipe. 2. The pipe conveyor type weighing device according to claim 1, wherein the pipe is provided with a bent portion. 3. The pipe conveyor weighing device according to claim 1, wherein a part of the pipe is bendable.