Blockage detection device for belt conveyor

Abstract

The utility model relates to a belt conveyor material blocking detection device which comprises a belt conveyor A, a material flow switch of the belt conveyor A, a feed opening, a belt conveyor B, a material flow switch of the belt conveyor B and a control box, a power indicator lamp, time relays K01 and K02, a relay K03 and an alarm indicator lamp are arranged in the control box, the belt conveyor A conveys materials to the belt conveyor B through the feed opening, the material flow switch is installed at the position of a machine head of the belt conveyor A, and the material flow switch is installed at the position of a machine head of the belt conveyor B. A material flow switch is also installed at the tail position of the belt conveyor B. The discharging port is a middle transfer device from the belt conveyor A to the belt conveyor B. The control box receives state signals of the material flow switch of the belt conveyor A and the material flow switch of the belt conveyor B and logically judges the material blocking condition in the conveying process of the belt conveyors. The device is simple in structure, adopts a discharge port non-contact detection mode, logically judges the material blocking condition by detecting whether materials are conveyed by upstream and downstream belt conveyors, is suitable for various application scenes, is high in accuracy and response speed, and effectively avoids the occurrence of material blocking accidents.

Description

TECHNICAL FIELD

[0001] The patent application belongs to the field of automatic control technology, and more particularly relates to a belt conveyor blocking detection device. BACKGROUND

[0002] As an important industrial production conveying equipment, the belt conveyor plays a vital role in the production of various industries. However, in the process of transporting materials by using the belt conveyor, due to the wet material or the too large material block, the belt conveyor discharge port is blocked from time to time. The belt conveyor blocking is a common safety hazard. The occurrence of the blocking accident not only causes the equipment to stop and affects the production progress, but also brings safety risks to the workers, and even causes a major accident. Therefore, designing a device capable of analyzing and detecting the blocking of the belt conveyor discharge port has very important significance for the safety protection of the belt conveyor. CONTENT OF THE UTILITY MODEL

[0003] The technical problem to be solved by the utility model is to provide a belt conveyor blocking detection device which can reduce or even avoid the blocking of the belt conveyor.

[0004] In order to solve the above problems, the technical scheme adopted by the utility model is:

[0005] A belt conveyor blocking detection device, comprising a belt conveyor A and a belt conveyor B arranged upstream and downstream, a belt conveyor A flow switch installed at the head of the belt conveyor A, a belt conveyor B flow switch installed at the tail of the belt conveyor B, and a control box connected with the belt conveyor A flow switch and the belt conveyor B flow switch, wherein a discharge port is arranged between the belt conveyor A and the belt conveyor B.

[0006] The control box is provided with a power indicator light E01, a time relay K01, a time relay K02, a relay K03 and an alarm indicator light E02. There are five groups of circuit connections in the control box electric circuit, which are respectively:

[0007] The power indicator light E01 is connected to the control box electric circuit.

[0008] The belt conveyor A flow switch is connected in series with the coil of the time relay K01 and then connected to the control box electric circuit.

[0009] The belt conveyor B flow switch is connected in series with the coil of the time relay K02 and then connected to the control box electric circuit.

[0010] The coil of the time relay K01 normally open contact, the coil of the time relay K02 normally closed contact and the coil of the relay K03 are connected in series and then connected to the control box electric circuit.

[0011] The coil of the relay K03 normally open contact and the alarm indicator light E02 are connected in series and then connected to the control box electric circuit.

[0012] The time relay K01 in the control box is set to a delay time t1, and the time for transporting the material from the belt conveyor A flow switch to the belt conveyor B flow switch is t2, and t1>t2.

[0013] Further, the belt conveyor A flow switch and the belt conveyor B flow switch are both FS-A series proximity switches.

[0014] Further, t1=t2+0.1s~0.5s.

[0015] Further, the time relay K02 is set to a delay time ≥1 second.

[0016] Further, the power indicator light E01 and the alarm indicator light E02 are both LED lights.

[0017] Further, an alarm is also provided, and the relay K03 normally open contact, the alarm indicator light E02 and the alarm are connected in series in the control box electrical circuit.

[0018] Further, the alarm is a buzzer alarm.

[0019] Due to the adoption of the above technical scheme, the beneficial effects obtained by the utility model are:

[0020] The device adopts mechanical detection of the belt conveyor flow switch, detects whether the upstream belt conveyor head and the downstream belt conveyor tail position transport the material, controls the occurrence of the blockage accident of the discharge port in the control box through electrical logic judgment, and outputs an alarm signal. The belt conveyor blockage detection device has the advantages of simple structure, non-contact detection of the discharge port, logical judgment of the blockage condition through detection of the upstream and downstream belt conveyor material, suitability for various application scenarios, high accuracy, fast response speed, and effective avoidance of the occurrence of the blockage accident. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of the utility model.

[0022] Figure 2 It is an electrical principle diagram of the control box in the utility model.

[0023] Among them: 1. Belt conveyor A; 2. Belt conveyor A flow switch; 3. Control box; 4. Belt conveyor B flow switch; 5. Belt conveyor B; 6. Discharge port. CONCRETE IMPLEMENTING METHOD

[0024] The utility model will be further described in detail in combination with examples.

[0025] A belt conveyor blockage detection device, such as Figure 1, including belt conveyor A 1, belt conveyor A flow switch 2, control box 3, belt conveyor B flow switch 4, belt conveyor B 5, discharge port 6. The upstream and downstream of the belt conveyor A 1 and the belt conveyor B 5 are provided, the belt conveyor A flow switch 2 is installed at the head of the belt conveyor A 1, the belt conveyor B flow switch 4 is installed at the tail of the belt conveyor B 5, the belt conveyor A flow switch 2 and the belt conveyor B flow switch 4 are connected with the control box 3, the discharge port 6 is arranged between the belt conveyor A 1 and the belt conveyor B 5, the discharge port 6 is an intermediate transfer device for the belt conveyor A 1 to transport materials to the belt conveyor B 5, which is used to prolong the transportation distance and change the transportation direction.

[0026] The belt conveyor A 1 and the belt conveyor B 5 are conveying devices for transporting materials, which include a conveying belt, a carrier roller, a roller, a tensioning device, a driving device and the like, and the materials are transported from the belt conveyor A 1 to the belt conveyor B 5.

[0027] The belt conveyor A flow switch 2 and the belt conveyor B flow switch 4 are used to detect whether there is material in the belt conveyor, the belt conveyor A flow switch 2 is installed at the head of the belt conveyor A 1, and the belt conveyor B flow switch 4 is installed at the tail of the belt conveyor B 5. The belt conveyor A flow switch 2 and the belt conveyor B flow switch 4 are both FS-A series proximity switches.

[0028] The device uses the belt conveyor flow switch to mechanically detect whether there is material at the head of the upstream belt conveyor A 1 and the tail of the downstream belt conveyor B 5, the control box 3 collects the flow signal and judges whether the discharge port 6 is blocked by electrical logic, and outputs an alarm signal. That is, when the belt conveyor A flow switch 2 detects that the belt conveyor A 1 has material transportation, the belt conveyor B flow switch 4 detects that the belt conveyor B 5 has no material transportation, the control box 3 electrical circuit will judge that the discharge port 6 is blocked, and an alarm signal is sent.

[0029] As shown in Figure 2 , the control box 3 is provided with a power indicator light E01, a time relay K01, a time relay K02, a relay K03 and an alarm indicator light E02, and the power indicator light E01 and the alarm indicator light E02 are both LED lights. The control box 3 is designed with an electrical circuit, which receives the state signal of the belt conveyor A flow switch 2 and the belt conveyor B flow switch 4, logically judges the blocking condition in the belt conveyor transportation process, and sends an alarm signal. There are five groups of circuits connected in the electrical circuit, which are:

[0030] The power indicator light E01 is connected to the electrical circuit of the control box 3;

[0031] The belt conveyor A flow switch 2 and the coil of the time relay K01 are connected in series and connected to the electrical circuit of the control box 3;

[0032] The coil of the time relay K02 is connected in series with the belt conveyor B flow switch 4 and then connected to the electric circuit of the control box 3.

[0033] The coil of the time relay K01, the coil of the time relay K02 and the coil of the relay K03 are connected in series and then connected to the electric circuit of the control box 3.

[0034] The coil of the relay K03 and the alarm indicator E02 are connected in series and then connected to the electric circuit of the control box 3.

[0035] The time relay K01 in the control box 3 is set to a delay time t1, and the time for transporting the material from the belt conveyor A flow switch 2 to the belt conveyor B flow switch 4 is t2, t1>t2.

[0036] The total switch Q01 in the control box 3 is closed, and the power indicator E01 is bright, which proves that the preparation is ready.

[0037] When the belt conveyor A 1 transports the material to the belt conveyor B 5 through the discharge port 6, there are three transportation processes, which are respectively: the material head transportation process, the continuous material transportation process and the material tail transportation process. The three transportation processes need to be analyzed and explained respectively.

[0038] In the material head transportation process, the material head is first transported to the tail part of the belt conveyor A 1, and with the running of the belt conveyor A 1, the material head is transported to the head part of the belt conveyor A 1. When the material head reaches the belt conveyor A flow switch 2, the belt conveyor A flow switch 2 detects that the belt conveyor A 1 has material transportation, that is Figure 2 The left FS-A proximity switch in the middle is actuated, the coil of the time relay K01 in the control box 3 is energized and attracted, and the time relay K01 is set to a delay time slightly greater than the time for transporting the material from the belt conveyor A flow switch 2 to the belt conveyor B flow switch 4, which is slightly greater than 0.1-0.5s, so the K01 normally open contact is not closed at this time, and remains normally open. The material continues to be transported with the belt conveyor A 1, falls into the tail position of the belt conveyor B 5 through the discharge port 6, and when the material head reaches the belt conveyor B flow switch 4, the belt conveyor B flow switch 4 detects that the belt conveyor B 5 has material transportation, which corresponds to Figure 2The FS-A proximity switch on the right side of the middle acts, the time relay K02 coil in the control box 3 is powered to attract, the time relay K02 normally closed contact is disconnected, then the time relay K01 reaches the set time, the time relay K01 normally open contact is closed, at this time the material is transported normally, because the time relay K01 normally open contact is closed, but the time relay K02 normally closed contact is disconnected, so no path is formed, so no material blocking alarm is generated. If the belt conveyor A material flow switch 2 detects that the belt conveyor A 1 has material transportation, and after the time relay K01 reaches the set time, the belt conveyor B material flow switch 4 does not detect that the belt conveyor B 5 has material transportation, the time relay K01 normally open contact is closed, the time relay K02 normally closed contact is not actuated, at this time the relay K03 coil is powered to attract, triggering the material blocking alarm.

[0039] During continuous material transportation, the belt conveyor A material flow switch 2 detects that the belt conveyor A 1 has material transportation, corresponding Figure 2 The FS-A proximity switch on the left side of the middle is closed, the time relay K01 coil in the control box 3 is powered to attract, the time relay K01 normally open contact is closed, the belt conveyor B material flow switch 4 detects that the belt conveyor B 5 has material transportation, corresponding Figure 2 The FS-A proximity switch on the right side of the middle is closed, the time relay K02 coil in the control box 3 is powered to attract, the time relay K02 normally closed contact is disconnected, at this time the relay K03 is in a power-off disconnected state, and no material blocking alarm is triggered. When the belt conveyor B material flow switch 4 detects that the belt conveyor B 5 has no material transportation, the time relay K01 normally open contact in the control box 3 is in a closed state, the time relay K02 normally closed contact is in a power-off delay closed state, at this time the relay K03 coil is powered to attract, triggering the material blocking alarm, the alarm indicator E02 flashes. At this time, in order to enhance the alarm effect, an alarm can be additionally provided, the relay K03 normally open contact, the alarm indicator E02 and the alarm are connected in series in the electrical circuit of the control box 3, the alarm is a buzzer alarm, so that the sound and light flash together to alarm.

[0040] In the tail of the material transport process, the belt conveyor A flow switch 2 detects that the belt conveyor A 1 has material transport, the time relay K01 coil in the control box 3 is energized and attracted, the time relay K01 normally open contact is closed, the belt conveyor B flow switch 4 detects that the belt conveyor B 5 has material transport, the time relay K02 in the control box 3 is energized and attracted, the time relay K02 normally closed contact is opened, and the relay K03 is in a power-off state. With the end of the material transport, the belt conveyor A flow switch 2 first detects the tail of the material, the belt conveyor A 1 has no material transport, the time relay K01 coil in the control box 3 is de-energized and opened, and the time relay K01 normally open contact is opened. With the tail of the material reaching the tail of the belt conveyor B 5, the belt conveyor B flow switch 4 detects that the belt conveyor B 5 has no material transport, the time relay K02 normally closed contact is de-energized and delayed closed, and the relay K03 is in a power-off state. No material blockage alarm is triggered.

[0041] The time relay K01 in the control box 3 is set to a delay time slightly greater than the time required for the material to be transported from the belt conveyor A flow switch 2 to the belt conveyor B flow switch 4, for example, the time relay K01 in the control box 3 is set to a delay time of t1, the time required for the material to be transported from the belt conveyor A flow switch 2 to the belt conveyor B flow switch 4 is t2, t1 is slightly greater than t2, and t1=t2+0.1s~0.5s. The time relay K02 is set to a delay time of ≥1 second to prevent false alarms caused by material shaking or material breakage.

[0042] As can be seen, the device uses flow switches installed at the head of the upstream belt conveyor and the tail of the downstream belt conveyor. The device detects whether there is material transport signal through the upstream and downstream belt conveyor flow switches, and logically judges the occurrence of belt blockage accident. When the belt conveyor normally transports material, the upstream and downstream belt conveyor flow switches both detect material transport. When the belt conveyor discharge port is blocked, the upstream belt conveyor flow switch detects material transport, while the downstream belt conveyor flow switch detects no material transport. At this time, the alarm is triggered, and an alarm signal is provided to the peripheral equipment.

Claims

1. A device for detecting a blockage of a belt conveyor, characterized in that The application relates to a belt conveyor system, which comprises a belt conveyor A (1) and a belt conveyor B (5) arranged in an upstream-downstream mode, a belt conveyor A flow switch (2) arranged at the head of the belt conveyor A (1), a belt conveyor B flow switch (4) arranged at the tail of the belt conveyor B (5), and a control box (3) connected with the belt conveyor A flow switch (2) and the belt conveyor B flow switch (4); a discharging port (6) is arranged between the belt conveyor A (1) and the belt conveyor B (5). The control box (3) is provided with a power indicator light E01, a time relay K01, a time relay K02, a relay K03 and an alarm indicator light E02; the control box (3) is connected with five groups of circuits, which are respectively: The power indicator light E01 is connected with the circuit of the control box (3); The belt conveyor A flow switch (2) is connected with the coil of the time relay K01 and then connected with the circuit of the control box (3); The belt conveyor B flow switch (4) is connected with the coil of the time relay K02 and then connected with the circuit of the control box (3); The coil of the time relay K01, the coil of the time relay K02 and the coil of the relay K03 are connected in series and then connected with the circuit of the control box (3); The coil of the relay K03 and the alarm indicator light E02 are connected in series and then connected with the circuit of the control box (3); The time relay K01 in the control box (3) is set to have a delay time t1, the time t2 for transporting the material from the belt conveyor A flow switch (2) to the belt conveyor B flow switch (4) is less than t1.

2. The device for detecting the blocking of the belt conveyor according to claim 1, characterized in that: The belt conveyor A flow switch (2) and the belt conveyor B flow switch (4) are both FS-A series proximity switches.

3. The device according to claim 1, characterized in that: t1=t2+0.1s~0.5s.

4. The device according to claim 1, characterized in that: The time relay K02 is set to have a delay time of more than 1 second.

5. The device according to claim 1, characterized in that: The power indicator light E01 and the alarm indicator light E02 are both LED lights.

6. The device for detecting the blockage of the belt conveyor according to any one of claims 1-5, characterized in that: An alarm device is further arranged, the coil of the relay K03, the alarm indicator light E02 and the alarm device are connected in series and then connected with the circuit of the control box (3).

7. The device according to claim 6, characterized in that it comprises: The alarm device is a buzzer alarm device.

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