Device and method for detecting state of driving system of circular cooler

Abstract

The invention relates to an annular cooler driving system state detection device which comprises a motor input shaft induction check block (1), a motor input shaft proximity switch (2), a speed reducer output intermediate shaft induction check block (3), a speed reducer output intermediate shaft proximity switch (4), a swing frame output shaft induction check block (5) and a swing frame output shaft proximity switch (6). A driven friction wheel equidistant sensing stop block (7), a driven friction wheel equidistant proximity switch (8) and a PLC control box (9), and proximity switch signals are sent to a corresponding terminal of the PLC control box through a cable; according to the technical scheme, four faults of motor output abnormity, speed reducer output abnormity, swing frame abnormity and friction wheel slipping of the annular cooler driving system can be timely and accurately detected, an alarm is given or a chain sintering system is shut down, material pressing accidents are avoided, and fault points are accurately output.

Description

Technical Field

[0001] The invention relates to a detection device, in particular to a state detection device for a ring cooler drive system, and belongs to the technical field of metallurgical equipment state detection. Background Art

[0002] The ring cooler is a large cooling equipment of the sintering system, which is composed of dozens of trolleys. Each trolley generally has 4 wheels, and the wheels run in a circular track. After the hot sintered ore is crushed by the single-roll crusher, the upstream equipment of the ring cooler, it passes through the single-roll chute to the ring cooler trolley. During the operation of the ring cooler trolley, the hot sintered ore is cooled by the blower. The cooled sintered ore passes through the ring cooler unloading chute to the plate feeder. The ring cooler drive system is mainly composed of an electronic control system, a drive motor, a reducer, a swing frame, a friction wheel, etc. If there is a problem in any link, the hot sintered ore will accumulate, the single-roll chute will be topped, the single-roll crusher will be blocked, or the single-roll chute will be damaged. Therefore, there is an urgent need for a detection device to detect the state of the ring cooler drive system in real time, and select alarm or chain stop of the sintering system according to the detected abnormality to avoid the expansion of accidents.

[0003] Circular cooler drive system (such as Figure 1 The system includes a motor, a reducer, a swing frame, an active friction wheel, a driven friction wheel, and a friction surface of the ring cooler trolley. When the system is running, the motor power is transmitted to the active friction wheel through the reducer and the swing frame. The surface of the ring cooler trolley is clamped by the active friction wheel and the driven friction wheel. The active friction wheel drives the ring cooler trolley to run along the track. The function of the swing frame is to enable the active friction wheel to be close to the friction surface of the ring cooler trolley when there is a slight deviation in the elevation of different trolleys, so as to maintain a certain friction force.

[0004] In the metallurgical industry, the state detection of the ring cooler is generally limited to slip detection. The detection methods include: (1) a tachometer generator or encoder to measure the speed of the ring cooler trolley and the motor output shaft speed. When the speed difference between the two is higher than the set value, an alarm or shutdown signal is issued. (2) Using the proximity switch to sense the motor output shaft and the inductive block installed on the driven friction wheel, the motor speed and the speed of the driven friction wheel are detected. When the difference between the two is higher than the set value, an alarm or shutdown signal is issued. (1) The system is complex, expensive and has a single function; (2) The function is too single and can only determine the slippage of the friction wheel, but cannot determine the fault point of the ring cooler drive system. Therefore, a new solution is urgently needed to solve the above technical problems. Summary of the invention

[0005] The present invention aims at the problems existing in the prior art and provides a ring cooler drive system status detection device. This technical solution can timely and accurately detect four types of faults in the ring cooler drive system, namely abnormal motor output, abnormal reducer output, abnormal swing frame, and friction wheel slippage, and alarm or chain sintering system shutdown, thereby avoiding the occurrence of material pressing accidents and accurately outputting the fault point.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows: a state detection device for a ring cooler drive system, the detection device comprising

[0007] The motor input shaft induction block (1), the motor input shaft proximity switch (2), the reducer output intermediate shaft induction block (3), the reducer output intermediate shaft proximity switch (4), the swing frame output shaft induction block (5), and the swing frame output shaft proximity switch (6), the driven friction wheel equidistant induction block (7), the driven friction wheel equidistant proximity switch (8), and the PLC control box (9), the proximity switch signal is sent to the corresponding terminal of the PLC control box through the cable,

[0008] The motor input shaft induction stopper (1) is welded on the motor input shaft flange.

[0009] The output intermediate shaft induction block (3) of the reducer is welded on the output intermediate shaft of the reducer.

[0010] The swing frame output shaft induction block (5) is welded on the swing frame output shaft, and the driven friction wheel equidistant induction block (7) is welded on the driven friction wheel.

[0011] The motor input shaft sensing block (1) is made of weldable metal material, and its sensing area is more than twice the sensing surface of the motor input shaft proximity switch. Six blocks are welded at equal distances along the edge of the flange. In the side view, the motor input shaft sensing block (1) protrudes from the flange by more than 1.5 cm, and its surface is flat in the vertical direction. After the motor input shaft proximity switch is fixed on the bracket, the sensing surface and the front of the sensing block are kept opposite to each other, with a distance of 0.3 to 0.8 cm, and the two planes are parallel to ensure the stability of the sensing signal, and ensure that the output shaft rotates one circle and senses 6 pulse signals.

[0012] Among them, the induction block (3) of the output intermediate shaft of the reducer is made of two semicircular ring-shaped induction block bottom plates, the inner diameter of which is the diameter of the intermediate shaft, the ring surface width is 5 cm, and the thickness is 0.5-1 cm. The two semicircular ring-shaped induction block bottom plates are welded on the intermediate shaft, and the two semicircular ring-shaped induction block bottom plates are kept on the same vertical plane. On the circumference formed by the two semicircular ring-shaped induction block bottom plates, 6 induction blocks are welded at equal intervals. In the side view, the induction block should protrude more than 1.5 cm from the flange plate, and the surface in the vertical direction should be flat. After the proximity switch is fixed on the bracket, the induction surface and the front face of the induction block are kept opposite, with a distance of 0.3-0.8 cm, and the two planes are parallel to ensure the stability of the induction signal, and ensure that the output shaft rotates one circle and senses 6 pulse signals.

[0013] Among them, the equidistant sensing blocks of the driven friction wheel are equidistant 1.5cm apart and 1.5cm away from the edge of the driven wheel. The number of sensing blocks varies according to the size of the driven wheel. The sensing block is made of weldable metal, and the sensing area is equal to the sensing surface of the proximity switch. In the side view, the equidistant sensing blocks of the driven friction wheel should protrude more than 1.5cm from the flange, and the surface in the vertical direction should be flat. After the proximity switch is fixed on the bracket, keep the sensing surface and the front of the sensing block facing each other, with a distance of 0.3 to 0.8cm, and the two planes parallel to ensure the stability of the sensing signal. When the friction wheel rotates, ensure that each sensing block signal is detected.

[0014] Among them: PLC control box, including power supply, CPU, at least 4-channel high-speed counting module, digital output module, input and output relay, PLC control box is used to receive the ring cooler operation signal from the sintering system, collect speed signal, perform logical judgment, and output the judgment result in the form of dry contact.

[0015] The input shaft pulse signal P1, the intermediate shaft pulse signal P2, the output shaft pulse signal P3, and the driven friction wheel pulse signal P4 are collected through 4 proximity switches and sent to the counting module of the PLC control box. The P1, P2, P3, and P4 are converted into corresponding speed signals N1, N2, N3, and N4 through the program.

[0016] Each proximity switch is designed with a corresponding induction block;

[0017] The control logic is as follows: 10 seconds after the PLC control box receives the ring cooler operation signal, it converts P1, P2, P3, P4 into corresponding speed signals N1, N2, N3, N4 through the program, and performs logical calculations synchronously:

[0018] 1) The ring cooler operation signal is normal and N1 < 80% of the motor speed, and the device determines that the motor output is abnormal;

[0019] 2) The ring cooler operation signal is normal. 1) When the motor output is normal, N2 < (N1 / speed ratio of reducer k) * 80%, the device determines that the reducer output is abnormal;

[0020] 3) The ring cooler operation signal is normal, 2) It is determined that there is no abnormality in the reducer output, (|N3-N2|) / N2>30%, and the device determines that the swing frame output is abnormal;

[0021] 4) The ring cooler operation signal is normal. 3) It is determined that there is no abnormality in the swing frame output. N4 < (N3 * conversion ratio k1) * 80%. The device determines that the friction wheel is slipping. (k1 is equal to the number of driven wheel induction blocks divided by the number of output shaft induction blocks)

[0022] The PLC control box outputs alarm or interlocking signals of different abnormal signals through corresponding relays. This signal can be sent to the original ring cooler control cabinet to shut down the ring cooler for protection.

[0023] Compared with the prior art, the present invention has the following advantages: 1) The technical solution collects the pulse signals of the input shaft, intermediate shaft, output shaft and driven friction wheel respectively through 4 groups of proximity switches. Combined with the diagnostic method, it can accurately determine the four faults of abnormal motor output, abnormal reducer output, abnormal swing frame and friction wheel slip of the ring cooler drive system, accurately output the fault type, provide clear fault information to maintenance personnel, and save processing time; 2) The device provides 4 interlocking shutdown dry contacts through 4 groups of relays. When the equipment is abnormal, the interlocking shutdown can be carried out to avoid the expansion of accidents; 3) The technical solution uses proximity switches and induction blocks to collect pulse signals, which are converted into speed signals through program logic. The driven friction wheel is set with equidistant blocks of 1.5 cm, and the speed of low-speed rotating equipment is collected by multi-pulse method. Compared with encoders, it has lower cost, convenient inspection and maintenance, and strong practicality; 4) The PLC control box of the technical solution is equipped with a touch screen, which is convenient for maintenance personnel to check and set parameters, and has a friendly interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 : Schematic diagram of the ring cooler drive system;

[0025] Figure 2 : Schematic diagram of the installation of the ring cooler drive system status detection device.

[0026] In the figure: 1. Motor input shaft induction block, 2. Motor input shaft proximity switch, 3. Reducer output intermediate shaft induction block, 4. Reducer output intermediate shaft proximity switch, 5. Swing frame output shaft induction block, 6. Swing frame output shaft proximity switch, 7. Driven friction wheel equidistant induction block, 8. Driven friction wheel equidistant proximity switch, 9. PLC control box. DETAILED DESCRIPTION

[0027] In order to deepen the understanding of the present invention, the present embodiment is described in detail below with reference to the accompanying drawings.

[0028] Example 1: See Figure 1 A state detection device for a ring cooler drive system, the detection device includes a motor input shaft induction block 1, a motor input shaft proximity switch 2, a reducer output intermediate shaft induction block 3, a reducer output intermediate shaft proximity switch 4, a swing frame output shaft induction block 5 and a swing frame output shaft proximity switch 6, a driven friction wheel equidistant induction block 7, a driven friction wheel equidistant proximity switch 8 and a PLC control box 9, the proximity switch signal is sent to the corresponding terminal of the PLC control box through a cable, the motor input shaft induction block 1 is welded on the motor input shaft flange, the reducer output intermediate shaft induction block 3 is welded on the reducer output intermediate shaft, the swing frame output shaft induction block 5 is welded on the swing frame output shaft, and the driven friction wheel equidistant induction block 7 is welded on the driven friction wheel.

[0029] Among them, the motor input shaft sensing block 1 is made of metal weldable material, and its sensing area is more than twice the sensing surface of the motor input shaft proximity switch. Six pieces are welded equidistantly along the edge of the flange. In the side view, the motor input shaft sensing block 1 protrudes more than 1.5 cm from the flange, and the surface in the vertical direction is flat. After the motor input shaft proximity switch is fixed in the bracket, the sensing surface and the front of the sensing block are kept opposite to each other, with a distance of 0.3 to 0.8 cm, and the two planes are parallel to ensure the stability of the sensing signal and ensure that the output shaft rotates one circle and senses 6 pulse signals.

[0030] Among them, the induction block 3 of the output intermediate shaft of the reducer is made of two semicircular ring-shaped induction block bottom plates, with an inner diameter of the intermediate shaft diameter, a ring surface width of 5cm, and a thickness of 0.5-1cm. The two semicircular ring-shaped induction block bottom plates are welded on the intermediate shaft, and the two semicircular ring-shaped induction block bottom plates are kept on the same vertical plane. On the circumference formed by the two semicircular ring-shaped induction block bottom plates, 6 induction blocks are welded at equal distances. In the side view, the induction block should protrude more than 1.5cm from the flange, and the surface in the vertical direction should be flat. After the proximity switch is fixed on the bracket, keep the induction surface and the front of the induction block opposite to each other, with a distance of 0.3-0.8cm, and the two planes parallel to ensure the stability of the induction signal, and ensure that the output shaft rotates one circle and senses 6 pulse signals.

[0031] Among them, the equidistant sensing blocks of the driven friction wheel are equidistant 1.5cm apart and 1.5cm away from the edge of the driven wheel. The number of sensing blocks varies according to the size of the driven wheel. The sensing block is made of weldable metal, and the sensing area is equal to the sensing surface of the proximity switch. In the side view, the equidistant sensing blocks of the driven friction wheel should protrude more than 1.5cm from the flange, and the surface in the vertical direction should be flat. After the proximity switch is fixed on the bracket, keep the sensing surface and the front of the sensing block facing each other, with a distance of 0.3 to 0.8cm, and the two planes parallel to ensure the stability of the sensing signal. When the friction wheel rotates, ensure that each sensing block signal is detected.

[0032] The input shaft, intermediate shaft, output shaft, and driven friction wheel have corresponding proximity switch signals defined as P1, P2, P3, and P4, which are connected to the PLC control box. At the same time, the ring cooler operation signal and the given speed are sent to the PLC control box, and the signal is processed through the above control logic. The PLC control box outputs 4 dry contact signals, which are abnormal motor output, abnormal reducer output, abnormal swing frame, and friction wheel slippage, for users to use.

[0033] Through the application of the ring cooler drive system status detection device and detection method, once the ring cooler drive system is abnormal, the device will directly lock the abnormal point and alarm or chain shutdown to avoid blockage or damage to equipment.

[0034] The PLC control box includes a power supply, a CPU, at least 4-channel high-speed counting modules, a digital output module, and input and output relays. The PLC control box is used to receive the ring cooler operation signal from the sintering system, collect speed signals, perform logical judgments, and output the judgment results in the form of dry contacts.

[0035] The input shaft pulse signal P1, the intermediate shaft pulse signal P2, the output shaft pulse signal P3, and the driven friction wheel pulse signal P4 are collected through 4 proximity switches and sent to the counting module of the PLC control box. The P1, P2, P3, and P4 are converted into corresponding speed signals N1, N2, N3, and N4 through the program.

[0036] Each proximity switch is designed with a corresponding induction block;

[0037] The control logic is as follows: 10 seconds after the PLC control box receives the ring cooler operation signal, it converts P1, P2, P3, P4 into corresponding speed signals N1, N2, N3, N4 through the program, and performs logical calculations synchronously:

[0038] 1) The ring cooler operation signal is normal and N1 < 80% of the motor speed, and the device determines that the motor output is abnormal;

[0039] 2) The ring cooler operation signal is normal. 1) When the motor output is normal, N2 < (N1 / speed ratio of reducer k) * 80%, the device determines that the reducer output is abnormal;

[0040] 3) The ring cooler operation signal is normal, 2) It is determined that there is no abnormality in the reducer output, (|N3-N2|) / N2>30%, and the device determines that the swing frame output is abnormal;

[0041] 4) The ring cooler operation signal is normal. 3) It is determined that there is no abnormality in the swing frame output. N4 < (N3 * conversion ratio k1) * 80%. The device determines that the friction wheel is slipping. (k1 is equal to the number of driven wheel induction blocks divided by the number of output shaft induction blocks)

[0042] The PLC control box outputs alarm or interlocking signals of different abnormal signals through corresponding relays. This signal can be sent to the original ring cooler control cabinet to shut down the ring cooler for protection.

[0043] It should be noted that the above embodiments are not intended to limit the protection scope of the present invention, and equivalent changes or substitutions made on the basis of the above technical solutions all fall within the protection scope of the claims of the present invention.

Claims

1. A state detection device for a ring cooler drive system, characterized in that: The detection device comprises a motor input shaft induction block (1), a motor input shaft proximity switch (2), a reducer output intermediate shaft induction block (3), a reducer output intermediate shaft proximity switch (4), a swing frame output shaft induction block (5), and a swing frame output shaft proximity switch (6), a driven friction wheel equidistant induction block (7), a driven friction wheel equidistant proximity switch (8), and a PLC control box (9). The proximity switch signal is sent to the corresponding terminal of the PLC control box through a cable. The motor input shaft induction stopper (1) is welded on the motor input shaft flange. The output intermediate shaft induction block (3) of the reducer is welded on the output intermediate shaft of the reducer. The swing frame output shaft induction block (5) is welded on the swing frame output shaft. The driven friction wheel equidistant induction block (7) is welded on the driven friction wheel.

2. The state detection device for the ring cooler drive system according to claim 1, characterized in that: The motor input shaft induction block (1) is made of a weldable metal material, and its induction area is more than twice the induction surface of the motor input shaft proximity switch. Six blocks are welded at equal distances along the edge of the flange. The motor input shaft induction block (1) protrudes from the flange by more than 1.5 cm, and its surface is flat in the vertical direction. After the motor input shaft proximity switch is fixed on the bracket, the induction surface and the front of the induction block are kept opposite to each other, with a distance of 0.3 to 0.8 cm, and the two planes are parallel to ensure the stability of the induction signal, and ensure that the output shaft rotates one circle and senses 6 pulse signals.

3. The state detection device for the ring cooler drive system according to claim 2 is characterized in that: The induction block (3) of the output intermediate shaft of the reducer is made of two semicircular ring-shaped induction block bottom plates, the inner diameter of which is the diameter of the intermediate shaft, the ring surface width is 5 cm, and the thickness is 0.5-1 cm. The two semicircular ring-shaped induction block bottom plates are welded on the intermediate shaft, and the two semicircular ring-shaped induction block bottom plates are kept on the same vertical plane. On the circumference formed by the two semicircular ring-shaped induction block bottom plates, 6 induction blocks are welded at equal intervals. The induction block should protrude from the flange by more than 1.5 cm, and the surface in the vertical direction should be flat. After the proximity switch is fixed on the bracket, the induction surface and the front face of the induction block are kept opposite to each other, with a distance of 0.3-0.8 cm, and the two planes are parallel to ensure the stability of the induction signal, and ensure that the output shaft rotates one circle and senses 6 pulse signals.

4. The state detection device for the ring cooler drive system according to claim 3 is characterized in that: The equidistant sensing blocks of the driven friction wheel are equidistant 1.5 cm apart and 1.5 cm away from the edge of the driven wheel. The number of sensing blocks varies depending on the size of the driven wheel. The sensing blocks are made of weldable metal material, and the sensing area is equal to the sensing surface of the proximity switch. The equidistant sensing blocks of the driven friction wheel should protrude from the flange by more than 1.5 cm, and the surface in the vertical direction should be flat. After the proximity switch is fixed on the bracket, keep the sensing surface and the front of the sensing block facing each other, with a distance of 0.3 to 0.8 cm, and the two planes parallel to ensure the stability of the sensing signal. When the friction wheel rotates, ensure that each sensing block signal is detected.

5. The state detection device for the drive system of the ring cooler according to claim 3 or 4, characterized in that: The PLC control box includes a power supply, a CPU, at least 4-channel high-speed counting modules, a digital output module, and input and output relays. The PLC control box is used to receive the ring cooler operation signal from the sintering system, collect speed signals, perform logical judgments, and output the judgment results in the form of dry contacts. The input shaft pulse signal P1, the intermediate shaft pulse signal P2, the output shaft pulse signal P3, and the driven friction wheel pulse signal P4 are collected through 4 proximity switches and sent to the counting module of the PLC control box. The P1, P2, P3, and P4 are converted into corresponding speed signals N1, N2, N3, and N4 through the program. Each proximity switch is designed with a corresponding induction block; The control logic is as follows: 10 seconds after the PLC control box receives the ring cooler operation signal, it converts P1, P2, P3, P4 into corresponding speed signals N1, N2, N3, N4 through the program, and performs logical calculations synchronously: 1) The ring cooler operation signal is normal and N1 < 80% of the motor speed, and the device determines that the motor output is abnormal; 2) The ring cooler operation signal is normal. 1) When the motor output is normal, N2 < (N1 / speed ratio of reducer k) * 80%, the device determines that the reducer output is abnormal; 3) The ring cooler operation signal is normal, 2) It is determined that there is no abnormality in the reducer output, (|N3-N2|) / N2>30%, and the device determines that the swing frame output is abnormal; 4) The ring cooler running signal is normal. 3) It is determined that there is no abnormality in the swing frame output, N4 < (N3 * conversion ratio k1) * 80%, the device determines that the friction wheel is slipping, k1 is equal to the number of driven wheel induction blocks divided by the number of output shaft induction blocks, The PLC control box outputs alarm or interlocking signals of different abnormal signals through corresponding relays. This signal can be sent to the original ring cooler control cabinet to shut down the ring cooler for protection.

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