Belt conveyor anti-blocking bucket device and belt conveyor

Abstract

The present invention relates to the field of ore transfer technology, and specifically to a belt conveyor anti-bucket blocking device and a belt conveyor; wherein the belt conveyor anti-bucket blocking device includes a grounding terminal A, a probe B, a relay alarm device, and a control circuit; the grounding terminal A is connected to the lower hopper bypass, and the probe B is suspended above the gate plate in the lower hopper; the control circuit is used to control the relay alarm device to generate an alarm signal when the probe B contacts the ore accumulated in the lower hopper and short-circuits the grounding terminal A. The belt conveyor anti-bucket blocking device provided by the present invention can control the relay alarm device to alarm through a circuit signal when the probe B contacts the ore accumulated in the lower hopper and short-circuits the grounding terminal A, and has a high reaction sensitivity, so as to facilitate real-time and accurate monitoring of the situation in the bucket.

Description

Technical Field

[0001] The invention relates to the technical field of ore transfer, in particular to a belt conveyor anti-bucket blocking device and a belt conveyor. Background Art

[0002] During the beneficiation and crushing process, the ore is initially crushed coarsely by a jaw crusher at the bottom of the pit, followed by secondary and tertiary crushing by a cone crusher. Belt conveyors are primarily used to transport the raw ore and concentrate. The crushed ore is transported by the belt conveyor, buffered by the lower hopper, and then fed to the next belt, driven by the belt, into the next process step.

[0003] During the belt transportation process, due to the large particle size of the raw ore and the high mud content, there are many debris such as machine parts, mine linings, etc. that fall off during the mining process in the underground raw ore. The hopper is often blocked when entering the hopper. If it is not discovered in time, a large amount of ore will be piled up on the running belt, which may easily cause the belt to tear. In severe cases, it may even lead to failure of the head wheel, burning of the motor and other production equipment failures, seriously affecting production efficiency. Summary of the Invention

[0004] The present invention aims at solving the technical problems existing in the prior art and provides a belt conveyor bucket anti-blocking device to solve the problem that the bucket is easily blocked during ore unloading, thereby causing equipment failure.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a belt conveyor anti-blocking bucket device, based on a hopper arranged at the unloading end of the belt conveyor, includes a grounding terminal A, a probe B, a relay alarm device and a control circuit;

[0006] The grounding terminal A is connected to the lower hopper bypass, and the probe B is suspended above the gate plate in the lower hopper; the control circuit is used to control the relay alarm device to generate an alarm signal when the probe B contacts the ore accumulated in the lower hopper and short-circuits with the grounding terminal A.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the control circuit includes a power supply circuit and a control circuit; the power supply circuit is used to provide working power for the control circuit; and the control circuit is used to connect the power supply circuit and the relay alarm device when the probe B is short-circuited with the ground terminal A.

[0009] Furthermore, the control circuit includes a first-stage transistor, a second-stage transistor and a relay; the collector of the first-stage transistor is connected to the ground terminal A through a collector resistor, the base is connected to the probe B through a base bias resistor, and its emitter is connected to the base of the second-stage transistor through an emitter resistor; the collector of the second-stage transistor is connected to the relay.

[0010] Furthermore, the relay alarm device includes a contactor and an indicator light and an electric bell connected to the contactor in sequence; the control end of the contactor is connected to the relay.

[0011] Furthermore, the power supply circuit includes a transformer and a unidirectional rectifier bridge; the transformer is used to reduce the voltage of the AC power supply, and the unidirectional rectifier bridge is used to rectify the reduced voltage AC into a DC power supply.

[0012] Furthermore, the inner wall of the lower hopper is also provided with a protective plate covering the probe B.

[0013] Moreover, the anti-bucket blocking device for a belt conveyor provided by the present invention has at least the following beneficial effects compared with the prior art: when the probe B contacts the ore accumulated in the lower hopper and short-circuits with the ground terminal A, the relay alarm device can be controlled to sound an alarm through the circuit signal, and the reaction sensitivity is high, so as to facilitate real-time and accurate monitoring of the situation in the hopper.

[0014] In addition, the present invention also provides a belt conveyor, including a belt conveyor assembled by a frame, a drive roller, a belt and a motor drive mechanism, a lower hopper and the belt conveyor anti-bucket blocking device; the power supply end of the motor drive mechanism is connected to the contactor control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the principle of the present invention;

[0016] Figure 2 This is a circuit diagram of the control circuit of the present invention;

[0017] Figure 3 It is the circuit principle diagram of the belt conveyor of the present invention.

[0018] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0019] 1. Unloading machine, 2. Unloading hopper, 3. Protective plate. DETAILED DESCRIPTION

[0020] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0021] It should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integrated structures. Those skilled in the art will understand the specific meanings of such terms in this patent based on specific circumstances.

[0022] like Figure 1 、 Figure 2 as well as Figure 3 As shown, the anti-bucket blocking device for the belt conveyor 1 designed by the present invention is based on the discharge hopper 2 arranged at the discharge end of the belt conveyor 1, including a grounding terminal A, a probe B, a relay alarm device and a control circuit;

[0023] The grounding terminal A is bypass-connected to the lower hopper 2, and the probe B is suspended above the gate plate in the lower hopper 2. The position of the probe B can be adjusted according to actual conditions. The control circuit is used to control the relay alarm device to generate an alarm signal when the probe B contacts the ore accumulated in the lower hopper and short-circuits with the grounding terminal A.

[0024] The present invention connects the ground terminal A to the lower hopper 2 for conduction. Once the ore or other debris in the lower hopper 2 accumulates too much and causes a hopper jam and contacts the probe B, the ground terminal A and the probe B are short-circuited. At this time, the short-circuit signal is transmitted to the relay alarm device through the control circuit to send out an alarm signal, thereby informing the staff that the hopper 2 is jammed. The staff can then deal with the lower hopper 2 in the first time according to the alarm signal and resume production.

[0025] In one embodiment, the control circuit includes a power supply circuit and a control circuit. The power supply circuit provides operating power to the control circuit. The control circuit is configured to connect the power supply circuit to a relay alarm device when probe B short-circuits ground terminal A. When probe B contacts ore within the bucket, the relay alarm device is activated via a circuit signal. This highly sensitive response facilitates real-time and accurate monitoring of the bucket's conditions.

[0026] Specifically, the control circuit includes a first-stage transistor, a second-stage transistor and a relay KA1; the collector of the first-stage transistor is connected to the ground terminal A through a collector resistor, the base is connected to the probe B through a base bias resistor, and its emitter is connected to the base of the second-stage transistor through an emitter resistor; the collector of the second-stage transistor is connected to the relay KA1.

[0027] When ground terminal A and probe B are short-circuited, the power supply reverse-biases the collector junction of the first-stage transistor through the collector resistor and forward-biases the emitter junction of the first-stage transistor through the base bias resistor, putting the first-stage transistor in an amplified state. The emitter resistor of the first-stage transistor provides an appropriate bias current to the base of the second-stage transistor and an appropriate bias voltage to the emitter junction, turning the second-stage transistor on. This energizes the coil of relay KA1, closing it and causing the corresponding contacts to actuate. Conversely, when ground terminal A and probe B are disconnected, the circuit automatically switches off, and relay KA1 loses power.

[0028] Preferably, the relay alarm device includes a contactor KM, an indicator light HW, and a bell HB connected in sequence to the contactor KM. The control terminal of the contactor KM is connected to the relay KA1. When the ground terminal A and the probe B short-circuit, the relay KA1 activates, its normally open contact closes, energizing the coil of the contactor KM and self-protecting. The normally closed contact disconnects the control circuit of the conveyor belt 1, causing the conveyor belt 1 to stop. Simultaneously, the normally open contact of the contactor KM closes, and the indicator light and bell enter an alarm state. Based on the signal from the indicator light or bell, personnel can immediately address the situation and resume production.

[0029] In one embodiment, the power supply circuit includes a transformer and a unidirectional rectifier bridge. The transformer is used to step down the AC power supply, and the unidirectional rectifier bridge is used to rectify the stepped-down AC power supply into DC power. The unidirectional rectifier bridge is composed of four 1N4007 diodes. When the main switch QS is closed, the 220V AC voltage is converted to 24V AC by the transformer and supplied to the unidirectional rectifier bridge. After rectification, it becomes 24*0.9V DC, which serves as the operating power supply for the control circuit.

[0030] During the rectification process of the unidirectional rectifier bridge, there is a certain voltage drop, which is generally 0.9 of the expected voltage. Therefore, the output voltage is appropriately adjusted to meet the line operating voltage.

[0031] As an embodiment, the inner wall of the hopper 2 is also provided with a protective plate 3 covering the probe B, which shields the probe B through protection to ensure that the ore will not directly hit the probe B and cause damage to the probe during the process of ore being discharged along the hopper 2.

[0032] The present invention also provides a belt conveyor 1 comprising a belt conveyor assembled from a frame, drive rollers, a belt, and a motor drive mechanism; a hopper 2; and the aforementioned anti-bucketing device for the belt conveyor 1; the power supply end of the motor drive mechanism is controllably connected to a contactor KM. By adding the anti-bucketing device to the belt conveyor 1, the belt conveyor 1 can ensure orderly ore transportation. In the event of a bucket jam, an alarm is quickly issued indicating the location of the jam and the corresponding belt conveyor 1 is shut down. This reduces production and equipment failures, reduces unplanned downtime by 10% year-on-year, improves production efficiency, and saves maintenance and spare parts costs.

[0033] It should be noted that, in this article, the terms "include", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. Unless otherwise expressly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0035] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A belt conveyor anti-blocking bucket device, based on a discharge hopper arranged at the discharge end of the belt conveyor, characterized in that: It includes ground terminal A, probe B, relay alarm device and control circuit; The grounding terminal A is connected to the lower hopper bypass, and the probe B is suspended above the gate plate in the lower hopper; the control circuit is used to control the relay alarm device to generate an alarm signal when the probe B contacts the ore accumulated in the lower hopper and short-circuits with the grounding terminal A; The control circuit includes a power supply circuit and a control circuit; the power supply circuit is used to provide a working power supply for the control circuit; the control circuit is used to connect the power supply circuit and the relay alarm device when the probe B is short-circuited with the ground terminal A; The control circuit includes a primary transistor, a secondary transistor, and a relay; the collector of the primary transistor is connected to the ground terminal A via a collector resistor, the base is connected to the probe B via a base bias resistor, and the emitter is connected to the base of the secondary transistor via an emitter resistor; the collector of the secondary transistor is connected to the relay; The relay alarm device includes a contactor and an indicator light and an electric bell connected to the contactor in sequence; the control end of the contactor is connected to the relay; The power supply circuit includes a transformer and a unidirectional rectifier bridge; the transformer is used to reduce the voltage of the AC power supply, and the unidirectional rectifier bridge is used to rectify the reduced AC power into a DC power supply.

2. The belt conveyor anti-blocking bucket device according to claim 1, characterized in that: The inner wall of the lower hopper is also provided with a protective plate covering the probe B.

3. A belt conveyor, characterized in that: It includes a belt conveyor assembled by a frame, a transmission roller, a belt and a motor drive mechanism, a lower hopper and a belt conveyor anti-blocking bucket device as described in any one of claims 1-2; the power supply end of the motor drive mechanism is connected to the contactor control.

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