Horizontal coke oven split type secondary air door based on PLC control

Abstract

The utility model discloses a horizontal coke oven split type secondary air door based on PLC (Programmable Logic Controller) control. The horizontal coke oven split type secondary air door comprises a control box and an actuating mechanism, wherein the control box is connected and communicated with the actuating mechanism through a high-temperature-resistant cable. A motor in the executing mechanism provides power for equipment, and a reduction gearbox is connected with the motor through gear meshing. The worm and gear mechanism is connected with the speed reducer and the air door transmission shaft and used for adjusting the air door angle. The actuating mechanism is fixed on the tuyere through a connecting flange; and the tuyere is connected with the coke oven carbonization chamber through a flange. The device is connected in a split manner, is suitable for high-temperature environments of coke ovens, and is not easy to damage.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the horizontal coke oven technical field, specifically is a horizontal coke oven split type secondary air door based on PLC control. BACKGROUND

[0002] The carbonization chamber temperature is required to be kept at 1290-1310 DEG C in the horizontal coke oven production process, and the specific coking temperature is determined according to the turnover time. The horizontal coke oven temperature control is mainly controlled by the secondary air door to control the air circulation in the coke oven, thereby controlling the internal temperature of the carbonization chamber, influencing the coking temperature and coke quality of the carbonization chamber. The modern horizontal coke oven secondary air door tends to be automatic and intelligent. By adopting advanced control system and sensor, remote control and intelligent adjustment of the air door can be realized, the convenience and accuracy of operation are improved, the existing coke oven secondary air door actuator is mostly integrated structure, the circuit board and actuator are integrated, the secondary air door opening is controlled by PLC, however, the secondary air door works at 1300 DEG C in the horizontal coke oven production process, and the control element works at about 120 DEG C, which leads to short service life of the internal electronic element of the secondary air door, and the replacement and maintenance process environment is relatively poor and difficult, thereby affecting the stable production of the coke oven. SUMMARY

[0003] The utility model discloses a horizontal coke oven split type secondary air door based on PLC control to overcome the prior art defects.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A kind of horizontal coke oven split type secondary air door based on PLC control, including air port, air door, control box, actuator and high temperature resistant cable.The air port is connected with coke oven carbonization chamber by flange, air door is installed in air port, air door is connected with lower actuator transmission shaft by coupling, the actuator is fixed to air port below by flange, is connected with operating box by high temperature resistant cable.

[0006] The above-mentioned horizontal coke oven split type secondary air door based on PLC control includes control box and actuator. The actuator includes a motor, a reduction gearbox, and a fan-shaped worm gear mechanism. The motor is installed at the rear of the box body and connected with the reduction gearbox through a gear to improve the output torque. The reduction gearbox cover is sealed with heat insulation to avoid contact with external dust. The reduction gearbox cover is provided with a manual adjustment hole for manual adjustment when damaged.

[0007] The fan-shaped worm gear mechanism includes a fan-shaped gear and a worm shaft. The worm shaft is the output shaft of the reduction gearbox and is connected with the fan-shaped worm gear to change the transmission direction. The transmission shaft on the worm gear is connected with the air door shaft through a coupling to adjust the angle of the air door.

[0008] The lower transmission shaft of the actuator is connected with a pointer for on-site observation of the angle, a sector gear is connected with the transmission shaft, the sector gear is engaged with another gear, the gear is connected with a potentiometer, the angle signal is converted into an electric signal, and the electric signal is transmitted back to the main control room through a high-temperature-resistant cable for feedback.

[0009] The control box can realize on-site operation, the high-temperature-resistant cable is connected to provide power supply for the motor of the actuator, and the potentiometer is connected to realize communication and feedback.

[0010] The utility model discloses the beneficial effect is, the utility model discloses the actuator and control box separate installation, when using, the actuator outer package a layer of thermal insulation material, better insulate the influence that furnace temperature brought. Control box does not need to install immediately the tuyere, no longer contacts high-temperature environment, effectively reduced the probability of control box electronic component being burnt out, increases its service life, to better realize the new generation horizontal coke oven precision temperature control and fire, improve the quality of coke, reduce equipment failure, improve production efficiency, reduce production cost. BRIEF DESCRIPTION OF DRAWINGS

[0011] The utility model is further described below in combination with the drawings and examples.

[0012] Figure 1 It is the whole structure schematic diagram of the utility model;

[0013] Figure 2 It is the actuator reduction gear box schematic diagram of the utility model;

[0014] Figure 3 It is the sector worm gear mechanism schematic diagram of the utility model;

[0015] Figure 4 It is the lower part of the actuator schematic diagram.

[0016] BRIEF DESCRIPTION OF DRAWINGS: 1, tuyere, 2, air door, 3, flange, 4, actuator, 5, connecting flange, 6, reduction gear box cover, 7, manual adjustment hole, 8, high-temperature-resistant cable, 9, control box, 10, shaft coupling, 11, end cover, 12, motor, 13, reduction gear box, 14, bearing, 15, worm, 16, sector worm wheel, 17, transmission shaft, 18, angle table, 19, sector gear, 20, potentiometer. DETAILED DESCRIPTION

[0017] The following is in combination with the drawings Figures 1-4 Further illustrate the specific implementation of the utility model of a kind of horizontal coke oven split type secondary air door based on PLC control, the utility model of a kind of horizontal coke oven split type secondary air door based on PLC control is not limited to the description of the following examples.

[0018] Example 1:

[0019] The present example gives a specific structure of horizontal coke oven split type secondary air door based on PLC control, as shown in Figures 1-4 The control box 9 and the actuator 4 are connected and communicated through the high-temperature-resistant cable 8. The motor 12 inside the actuator 4 provides power for the device, and the reduction box 13 is connected with the motor 12 through gear engagement. The worm 15 is fixed on the output end of the reduction box, and the sector worm 16 is engaged with the worm 15 and assembled on the transmission shaft. The actuator 4 is fixed on the tuyere 1 through the connecting flange 5, and the tuyere 1 is connected with the coke oven carbonization chamber through the flange 3.

[0020] By adopting the above technical scheme:

[0021] The reduction box 13 in the device is driven by the motor 12, and the motor 12 is data-interacted with the PLC through the control box 9 to control;

[0022] When the device is used, the coke oven monitors the temperature and air volume in the oven at this time, and the PLC controls the motor 12 to start running when the temperature does not reach the set range. The motor 12 increases the torque through the reduction box 13, changes the transmission direction through the sector worm 16 worm 17 mechanism, and at this time the transmission shaft 17 is connected with the air door 2 through the shaft coupling 10 to drive the air door 2 to rotate and change the angle.

[0023] Example 2:

[0024] On the basis of example 1, in the present example, the angle table 18 is connected with the transmission shaft 17, the sector gear 19 is installed on the transmission shaft, and the potentiometer 20 is installed on the gear. The potentiometer 20 is connected with the high-temperature-resistant cable 8.

[0025] By adopting the above technical scheme:

[0026] When the air door 2 of the device rotates, the sector gear 19 drives the potentiometer 20 gear to rotate, and at this time the angle signal is transmitted back to the main control room through the high-temperature-resistant cable 8 for feedback, so as to control the temperature of the carbonization chamber.

[0027] When the main control room has communication failure, on-site operation is performed. At this time, the air door 2 opening and closing angle can be adjusted through the button on the control box 9, and the opening and closing angle information is continuously transmitted to the display screen of the control box 9 by the potentiometer 20, and the required angle is adjusted to reach the required temperature.

[0028] Example 3:

[0029] On the basis of examples 1 and 2, in the present example, the reduction box cover 6 is reserved with a manual adjustment hole, an inner hexagonal wrench can be connected, and the worm 15 is connected inside.

[0030] Example 4:

[0031] On the basis of examples 1, 2 and 3, the manual operation handle facilitates the manual control of the angle of the air door when power is off, and the manual operation handle is a hexagonal wrench.

[0032] By adopting the above technical scheme:

[0033] When the high-temperature-resistant cable 8 fails, the execution device 4 cannot realize power control. At this time, the worm 15 is connected in the hexagonal wrench domain of the reduction gear cover 6, the hexagonal wrench is rotated, the worm 15 drives the sector worm gear 16 to rotate, and the transmission shaft 17 rotates, the coupling 10 connects the air door 2 to rotate. At this time, manual control is realized, and the angle of the air door 2 is observed through the lower end angle table 18, so that the fire temperature is accurately adjusted.

[0034] The above is a further detailed description of the utility model in combination with a specific preferred embodiment, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, which should be regarded as falling within the protection scope of the utility model.

Claims

1. A split-type secondary air damper for a horizontal coke oven based on PLC control, characterized in that: It includes a control box (9) and an actuator (4). The control box (9) and the actuator (4) are connected and communicate with each other via a high-temperature resistant cable (8). The motor (12) inside the actuator (4) provides power to the equipment. The gearbox (13) is connected to the motor (12) via gear meshing. The worm (15) is fixed to the output end of the gearbox. The fan-shaped worm wheel (16) meshes with the worm (15) and is assembled on the transmission shaft. The actuator (4) is fixed to the tuyeres (1) via a connecting flange (5). The tuyeres (1) are connected to the coke oven carbonization chamber via a flange (3).

2. The split-type secondary air damper for a horizontal coke oven based on PLC control according to claim 1, characterized in that: The control box (9) is installed separately from the actuator (4). The actuator (4) is fixed to the air outlet (1) by the connecting flange (5). The control box (9) is installed on the spot. The distance between the control box (9) and the actuator is <1.5m.

3. A split-type secondary air damper for a horizontal coke oven based on PLC control according to claim 2, characterized in that: The actuator (4) should be wrapped with heat insulation material during installation to better isolate high temperatures; The lower part of the actuator (4) is equipped with an angle gauge, which is connected to the drive shaft. The drive shaft is equipped with a sector gear, which meshes with a gear equipped with a potentiometer.

4. A split-type secondary air damper for a horizontal coke oven based on PLC control according to claim 3, characterized in that: The angle information collected by the potentiometer is transmitted back to the main control room via a high-temperature resistant cable, while the current damper angle is displayed on the screen on the control box.

5. A split-type secondary air damper for a horizontal coke oven based on PLC control according to claim 1, characterized in that: A sealing strip is installed between the gearbox (13) and the gearbox cover to enhance the airtightness of the equipment; the gearbox cover is reserved with a manual operation port to facilitate manual control of the damper angle when the power is off, and the manual operation handle is an internal hex wrench.

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