Screw conveyor fault automatic repair device and method

Abstract

The automatic repair device and method for screw conveyor faults include a first pneumatic gate arranged on the feed side of the hanging bearing of the screw conveyor; a second pneumatic gate arranged on the feed side of the discharge port of the screw conveyor; a PLC control module, a current transformer, and a current transmitter arranged in a control cabinet; the drive motor of the screw conveyor is connected to the current transformer, the current transformer is connected to the current transmitter, and the current transmitter is connected to the PLC control module. The PLC control module is respectively connected to the drive motor, the first pneumatic gate, the second pneumatic gate, and the material blockage alarm. The present invention monitors and feedbacks the material blockage problem of the screw conveyor in real time, automatically judges, and repairs it. It solves the technical problem in the prior art that material blockage cannot be discovered in time, and even if it is discovered, the equipment needs to be shut down for on-site staff to open the equipment to dig out the blocked material.

Description

Technical Field

[0001] The invention relates to the technical field of screw conveyor fault diagnosis, and in particular to a screw conveyor fault automatic repair device and method. Background Art

[0002] The screw conveyor is divided into U-type screw conveyor and tubular screw conveyor in appearance. The working principle of the screw conveyor is that the rotating spiral blade pushes the material to perform spiral conveying. The force that prevents the material from rotating with the screw conveyor blade is the material's own weight and the friction resistance of the screw conveyor casing to the material. The spiral blade is welded on the rotating shaft of the screw conveyor. The surface of the blade has solid surface type, belt surface type, blade surface type and other types according to the different conveyed materials. The screw shaft of the screw conveyor is equipped with a thrust bearing at the end of the material movement direction to offset the axial reaction force of the material on the screw. When the machine is long, an intermediate hanging bearing is added. It has a simple and novel structure, convenient maintenance, advanced technical indicators, small cross-sectional size, good sealing performance, safe and convenient operation, and is convenient for intermediate loading and unloading; the intermediate hanging bearing adopts two structures of rolling or sliding type, both of which are equipped with dustproof and sealing devices, and are easy to operate and maintain.

[0003] Screw conveyors are very sensitive to materials because of the small space for conveying materials. When the screw shaft rotates, materials are easily entangled; in addition, the intermediate hanging bearing is easily blocked by materials. Material blockage is the most common failure of screw conveyors. If the blockage occurs lightly, it will affect the output and increase power consumption; if the material blockage is serious, it will burn out the motor, break the screw shaft, and affect the normal production.

[0004] How to repair the failure caused by material blockage in the screw conveyor is a technical problem that needs to be solved. Summary of the invention

[0005] The present invention provides an automatic repair device and method for screw conveyor faults, which can monitor and feedback the material blocking problem of the screw conveyor in real time, automatically judge and repair it, and solve the technical problems in the prior art that the material blocking situation cannot be discovered in time, and even if it is discovered, the equipment needs to be shut down and the on-site staff needs to open the equipment to dig out the blocked material.

[0006] The technical solution adopted by the present invention is:

[0007] The screw conveyor fault automatic repair device comprises:

[0008] A first pneumatic gate disposed on the feed side of the suspension bearing of the screw conveyor;

[0009] A second pneumatic gate disposed on the feeding side of the discharge port of the screw conveyor;

[0010] A PLC control module, a current transformer, and a current transmitter are arranged in the control cabinet; the drive motor of the screw conveyor is connected to the current transformer, the current transformer is connected to the current transmitter, and the current transmitter is connected to the PLC control module;

[0011] The PLC control module is respectively connected to the drive motor, the first pneumatic gate, the second pneumatic gate, and the material blocking alarm.

[0012] A first material receiving trough is arranged below the first pneumatic gate, and a second material receiving trough is arranged below the second pneumatic gate.

[0013] An extension section L is provided at the end of the trough of the screw conveyor, and the rotation direction of the spiral blades of the extension section L is opposite to that of the spiral blades on the conveying side.

[0014] The material discharge port is provided with a material blocking alarm.

[0015] The present invention provides a screw conveyor fault automatic repair device and method, the technical effects are as follows:

[0016] 1: Add a blocking alarm at the discharge port to provide timely feedback of blocking signals.

[0017] 2: Add current transformers and current transmitters to the control cabinet to monitor and feedback the real-time current of the drive motor.

[0018] 3: The control cabinet adds a PLC control module to receive and process the current change signal and the blocking signal, and issue instructions to control the upstream equipment and pneumatic gates, drive the motor to rotate forward and reverse, and realize automatic repair of the blocking fault.

[0019] 4: The length of the end of the trough is lengthened, and the rotation direction of this section of the spiral blade is opposite to the conveying side, which plays a buffering role in the material blockage during the interval of the blockage control feedback time, and can reversely convey the congested material to the discharge port for discharge during subsequent normal operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the installation of the device of the present invention;

[0021] Figure 2 This is the control connection diagram of the device of the present invention. DETAILED DESCRIPTION

[0022] like Figure 1 , Figure 2 As shown, the screw conveyor fault automatic repair device comprises:

[0023] A first pneumatic gate 2 arranged on the feeding side of the hanging bearing 1 of the screw conveyor;

[0024] A second pneumatic gate 4 is arranged on the feeding side of the discharge port 3 of the screw conveyor;

[0025] A PLC control module 6, a current transformer 7, and a current transmitter 8 are arranged in the control cabinet; a driving motor 9 of the screw conveyor is connected to the current transformer 7, the current transformer 7 is connected to the current transmitter 8, and the current transmitter 8 is connected to the PLC control module 6;

[0026] The PLC control module 6 is respectively connected to the drive motor 9, the first pneumatic gate 2, the second pneumatic gate 4, and the material blocking alarm 5.

[0027] A first material receiving trough 10 is arranged below the first pneumatic gate 2 , and a second material receiving trough 11 is arranged below the second pneumatic gate 4 .

[0028] An extension section L is provided at the end of the trough of the screw conveyor, and the rotation direction of the spiral blades of the extension section L is opposite to that of the spiral blades on the conveying side.

[0029] The material discharge port 3 is provided with a material blocking alarm 5 .

[0030] The first pneumatic gate 2 and the second pneumatic gate 4 are quick-opening pneumatic LMD gates.

[0031] The material blocking alarm 5 adopts RS-02A-0118 alarm.

[0032] PLC control module 6 adopts SIEMENS S7-300 PLC controller.

[0033] The current transformer 7 adopts a BH-0.66 type transformer.

[0034] The current transmitter 8 adopts a SIN-DJI-5A transmitter.

[0035] The automatic repair method of screw conveyor fault is as follows: when material blockage occurs at the discharge port 3 of the screw conveyor, the blockage alarm 5 sounds an alarm, and at the same time, the operating current value of the driving motor 9 increases sharply relative to the set standard value, the current transformer 7 detects real-time current data and transmits it to the current transmitter 8, the PLC control module 6 receives the current data signal of the current transmitter 8, the PLC control module 6 controls the upstream equipment of the feed port 12 to stop feeding, the PLC control module 6 controls the second pneumatic gate 4 on the feeding side of the discharge port 3 to open, the PLC control module 6 controls the driving motor 9 to drive the screw conveyor to reverse, and the congested material inside the discharge port 3 is transported in reverse and flows into the second material receiving trough 11 through the second pneumatic gate 4; after the current of the driving motor 9 is stable, the second pneumatic gate 4 is closed, the screw conveyor is driven to rotate forward, the feed port 12 is reopened for feeding, and the screw conveyor operates normally.

[0036] When the hanging bearing 1 of the screw conveyor is blocked by material, the operating current value of the driving motor 9 increases sharply relative to the set standard value, the current transformer 7 detects real-time current data and transmits it to the current transmitter 8, the PLC control module 6 receives the current data signal of the current transmitter 8, the PLC control module 6 controls the upstream equipment of the feed port 12 to stop feeding, the PLC control module 6 controls the first pneumatic gate 2 on the feed side of the hanging bearing 1 to open, the PLC control module 6 controls the driving motor 9 to drive the screw conveyor to reverse, and the congested material at the hanging bearing 1 is transported in reverse and flows into the first material receiving trough 10 through the first pneumatic gate 2. After the current of the driving motor 9 stabilizes, the first pneumatic gate 2 is closed to drive the screw conveyor to rotate forward, the feed port 12 is reopened for feeding, and the screw conveyor operates normally.

[0037] An extension section L is provided at the end of the trough of the screw conveyor, and the rotation direction of the spiral blades of the extension section L is opposite to that of the spiral blades on the conveying side. It is used to buffer material blockages during the interval period of the blockage control feedback time, and can reversely convey the congested materials to the discharge port 3 for discharge during subsequent normal operation.

Claims

1. Automatic repair device for screw conveyor failure, characterized by The device includes: A first pneumatic gate (2) arranged on the feeding side of the hanging bearing (1) of the screw conveyor; A second pneumatic gate (4) provided on the feeding side of the discharge port (3) of the screw conveyor; A PLC control module (6), a current transformer (7), and a current transmitter (8) are arranged in a control cabinet; a drive motor (9) of the screw conveyor is connected to the current transformer (7), the current transformer (7) is connected to the current transmitter (8), and the current transmitter (8) is connected to the PLC control module (6); The PLC control module (6) is respectively connected to the drive motor (9), the first pneumatic gate (2), the second pneumatic gate (4), and the material blocking alarm (5).

2. The automatic repair device for screw conveyor failure according to claim 1 is characterized in that: A first material receiving trough (10) is provided below the first pneumatic gate (2), and a second material receiving trough (11) is provided below the second pneumatic gate (4).

3. The automatic repair device for screw conveyor failure according to claim 1 is characterized in that: An extension section (L) is provided at the end of the trough of the screw conveyor, and the rotation direction of the spiral blades of the extension section (L) is opposite to that of the spiral blades on the conveying side.

4. The automatic repair device for screw conveyor failure according to claim 1 is characterized in that: The material discharge port (3) is provided with a material blockage alarm (5).

5. A method for automatically repairing a screw conveyor failure using the automatic repair device for screw conveyor failure according to claim 1, characterized in that: When material is blocked at the discharge port (3) of the screw conveyor, the blocking alarm (5) sounds an alarm, and at the same time, the operating current value of the drive motor (9) increases sharply relative to the set standard value. The current transformer (7) detects real-time current data and transmits it to the current transmitter (8). The PLC control module (6) receives the current data signal from the current transmitter (8). The PLC control module (6) controls the upstream equipment of the feed port (12) to stop feeding. The PLC control module (6) controls the second pneumatic gate (4) on the feeding side of the discharge port (3) to open. The PLC control module (6) controls the drive motor (9) to drive the screw conveyor to reverse, and the blocked material inside the discharge port (3) is transported in the reverse direction and flows into the second receiving trough (11) through the second pneumatic gate (4). After the current of the drive motor (9) is stable, the second pneumatic gate (4) is closed, the screw conveyor is driven to rotate forward, and the feed port (12) is reopened for feeding, and the screw conveyor operates normally.

6. A method for automatically repairing a screw conveyor failure using the automatic repair device for screw conveyor failure according to claim 1, characterized in that: When the hanging bearing (1) of the screw conveyor is clogged with material, the operating current value of the drive motor (9) increases sharply relative to the set standard value, the current transformer (7) detects real-time current data and transmits it to the current transmitter (8), the PLC control module (6) receives the current data signal from the current transmitter (8), the PLC control module (6) controls the upstream equipment of the feed port (12) to stop feeding, the PLC control module (6) controls the first pneumatic gate (2) on the feed side of the hanging bearing (1) to open, the PLC control module (6) controls the drive motor (9) to drive the screw conveyor to reverse, the clogged material at the hanging bearing (1) is transported in the reverse direction, and flows into the first receiving trough (10) through the first pneumatic gate (2), after the current of the drive motor (9) is stabilized, the first pneumatic gate (2) is closed, the screw conveyor is driven to rotate forward, the feed port (12) is reopened for feeding, and the screw conveyor operates normally.

7. A method for automatically repairing a screw conveyor failure using the automatic repair device for screw conveyor failure according to claim 3, characterized in that: An extension section (L) is provided at the end of the trough of the screw conveyor, and the rotation direction of the spiral blades of the extension section (L) is opposite to that of the spiral blades on the conveying side, which is used to buffer the material blockage during the interval of the blockage control feedback time, and can reversely convey the congested material to the discharge port (3) for discharge during subsequent normal operation.

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