JPH0452178Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a chute blockage detection device, and particularly to a chute blockage detection device used in an aggregate production plant or the like.

[Prior Art and Problems] In aggregate production plants, a plurality of belt conveyors are connected and used to transport materials such as aggregate. A chute is provided at the connection point of each belt conveyor so that the transported material can be moved to the next belt conveyor.

When the transport material is transported by the operation of the belt conveyor, the transport material flows down within the chute in a motion shape corresponding to the speed of the belt conveyor, and is moved to the next belt conveyor to continue transport.

Due to the characteristics of the transported materials, which are characteristics of an aggregate production plant, variations in the shape of movement in the chute or fluctuations in the flow state may cause the inside of the chute to become clogged. If the belt conveyor continues to operate under such blockage conditions, damage such as vertical tearing of the conveyor belt may occur, especially if the conveyed material is aggregate with sharp edges. The problem was that it could not be prevented.

As a chute blockage detection device, there is a possibility of adopting optical detection means or ultrasonic detection means, but if the transported material is accompanied by dust or mud, optical detection means will be sensitive to the effects of these on the light emitting part and the light receiving part. In addition, when ultrasonic waves are reflected from the surface of transport materials, the reflected directions are directed in multiple directions, making it difficult to receive accurate information. It is.

Furthermore, all of the above-mentioned detection means have the disadvantage of being expensive.

The purpose of the present invention is to solve these conventional problems, and to provide an excellent chute blockage detection device that can quickly detect blockage of transported materials in a chute using simple means. It is something to do.

[Means for solving the problems] In order to achieve the above object, the present invention provides a
Chute 10 of transport material with 2, 13, 14
In the vicinity of the surrounding plate 12 on the surface facing the transportation direction, there is a wire-shaped conductive means 20 that is cut by the accumulation of the transportation material.
and a detection circuit 30 for detecting the disconnection.

[Function] The present invention has the following effects due to the above configuration. That is, in an aggregate production plant, due to the characteristics of the transported material, the inside of the chute may become clogged due to variations in the movement type or flow conditions within the chute.

At this time, the interior of the chute is blocked by the accumulation of the transported material up to the position of the conductive means provided near the surrounding plate on the surface facing the transport direction of the chute of the transported material, and the conductive means is in strong contact with the transported material. is disconnected, and the detection circuit exhibits a non-conducting state. In this way, it is possible to accurately detect the occurrence of a blockage due to accumulation of transported materials in the chute, and take measures such as automatically stopping the operation of the transport equipment upstream of the chute where the blockage has occurred. It is possible to prevent damage such as vertical tearing and falling due to overflow of transported materials from the shroud of the chute.

[Embodiment] Figures 1 to 3 show the configuration of an embodiment of the present invention. In FIGS. 1 and 2, 10 is a chute, and 12, 13, and 14 are each side of the surrounding plate of the chute 10. In particular, the shroud 12 constitutes an opposing surface in the transport direction of the transport material. A conductive means 20 is located near the top of the surrounding plate 12.
4 and provided in the width direction of the chute 10 under tension in a straight line.

The conductive means 20 is made of a conductive material such as an insulated wire, and has such strength that it can be cut by contact with the transport material. Further, a blast bus bar or the like is also suitable as the conductive means 20. 16 is a belt conveyor on the upstream side of the chute 10, and 17 is a belt conveyor on the downstream side of the chute 10. The transported material 23 to be transported can be moved as transported material 25 on the next belt conveyor 17.

Next, the operation of the above embodiment will be explained. In the above embodiment, when the belt conveyors 16, 17 are activated, the transported material 2 on the conveyor belt 18 is
3 moves in a steady state under a predetermined transport speed, and at the end is discharged under a specific motion shape such as 24 and flows down in the chute 10 to the next conveyor belt 17. The material is transported as transport material 23 onto the conveyor belt 19 at a predetermined transport speed. At this time, the transported material flows down within the chute 10 without causing a blockage phenomenon, and since there is no contact between the transported material and the conductive means 20, the detection circuit 30 does not cause disconnection of the conductive means. It is in a conductive state. on the other hand,
Because the shape and particle size of the transported material and the amount of transported material vary irregularly, the transported material 23 causes fluctuations in the movement type and flow condition within the chute, causing accumulation of the transported material within the chute 10. It may progress in the direction of arrow 26 and finally end up blocking the inside of the chute 10.

At this time, as the transport material accumulates up to the position of the conductive means 20, the conductive means 20 is cut off due to strong contact with the transport material, and the detection circuit 3
0 indicates a non-conducting state.

In the detection circuit 30, the return from the non-conductive state to the conductive state is performed by replacing the disconnected conductive means 20 with another new conductive means.

FIG. 3 shows a circuit diagram of the detection circuit 30. In FIG. 3, the power supply 32 shown in FIG.
, a voltage is applied between R and S, and the controller 3
The detection circuit 30 is connected to the conductive means 20 by an electric wire 22 via a wire 8, and a voltage of about 8V is always applied to the detection circuit 30, so that the detection circuit 30 is in a conductive state. The terminal 34 outputs an alarm signal, and the terminal 36 outputs a trip signal to transportation equipment. When the detection circuit 30 exhibits a non-conductive state due to disconnection of the conductive means 20, the relay
Activation of RX generates the above-mentioned alarm signal and trip signal.

As described above, according to the above embodiment, by cutting the conductive means, it is possible to accurately detect the occurrence of blockage due to accumulation of transported materials within the chute, and therefore By automatically stopping the operation of nearby transport equipment, it is possible to prevent damage such as vertical tearing of the conveyor belt or falling due to overflow of transport materials from the shroud.

[Effects of the invention] As is clear from the above embodiments, the present invention is effective in reducing the accumulation of the transport material on the conductive means near the shroud of the chute when the chute is deposited by the transport material during transport of the transport material. By cutting the transport material in the chute and detecting the cut by the detection circuit, blockage of the transported material in the chute can be accurately and quickly detected. In addition, the transportation equipment can continue to be operated simply by replacing the conductive means, and the structure can be simplified and installation in a chute can be facilitated, resulting in great effects.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of a chute blockage detection device according to an embodiment of the present invention, Fig. 2 is an explanatory diagram showing the operation inside the chute of the same device, and Fig. 3 is a circuit diagram of a detection circuit of the device. be. 10... Chute, 12, 13, 14... Surrounding plate, 20... Conductive means, 23, 25... Transportation material, 30... Detection circuit.

Claims (1)

[Scope of utility model registration request] Near the surrounding plate 12 on the surface facing the transportation direction of the transport material chute 10 having the surrounding plates 12, 13, 14,
A wire-shaped conductive means 20 that is cut due to the accumulation of transport materials, a detection circuit 30 that detects the cut,
A chute blockage detection device characterized by being provided with.