JP2560673B2 - Coke oven moving machine stop control method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a moving machine such as an extruder for a coke oven, a coal charging vehicle, a coke guide vehicle, a fire extinguisher or a bucket truck.
The present invention relates to a stop control method for stopping at a predetermined position by sequence control.

2. Description of the Related Art A moving machine of a coke oven runs to a specified target position and stops during the kiln removal work. After performing predetermined work, the machine moves to the next specified target position and stops. Work is normally performed continuously in a cycle of 7 to 10 minutes.

Conventionally, the operation of each mobile machine of the coke oven has been manually operated by a driver on board.

However, the working environment of the coke oven is exposed to high heat and dust-containing gas, and the operation of each mobile machine requires a stop accuracy of ± 20 mm, which requires considerable skill.

For this reason, various companies have recently made various proposals for automating the operation of each mobile machine of the coke oven, and have been put to practical use in some mobile machines.

For example, the central control unit equipped with a computer or the on-board control unit of each mobile machine allows position information from the position detection unit, speed information from the speed detector, and each kiln number center address and Coke Wharf center provided in the control unit. address,
A system that automatically controls the running, stopping, and work of each mobile machine according to a predetermined work program based on the address of the stop position in the fire extinguisher, the input work kiln information, etc., or a sequence that incorporates a control program A system in which a control device compares the position information from the position detection device with a destination address programmed in the sequence control device to give a command to the drive control device and a traveling device determination device is provided (Japanese Patent Laid-Open No. 60-170691). )and so on.

Problems to be Solved by the Invention The most important problem in the automatic operation of the coke oven moving machine is stop accuracy. For extruders, coke guide cars or coal charging cars, a stop accuracy of ± 20 mm is required for the target position.

However, the method using the central control unit equipped with a computer or the on-vehicle control unit for each mobile machine is excellent in terms of stopping accuracy, but not only requires a large amount of equipment cost, but it is also difficult to install the existing system because of installation restrictions. It is difficult to apply to the coke oven moving machine.

On the other hand, the method using the sequence control device in which the control program is incorporated has a low equipment cost and is relatively easy to apply to the existing moving machine of the coke oven. However, in this method, since the braking is stopped according to a predetermined braking pattern, there is a problem that the wheel slips due to the wetting of the rail in rainy weather, and an error is likely to occur at a stop position where the vehicle cannot accurately stop at the destination.

In order to prevent this, it is possible to reduce the deceleration at the time of stopping, but it takes a long time to stop, so that there is a problem that the kiln removal time becomes long.

An object of the present invention is to set a braking pattern in fine weather and in rainy weather in stopping control of a coke oven moving machine by a sequence control device incorporating a control program, and switch the braking pattern according to weather conditions. (EN) A stop control method for a coke oven moving machine, which can accurately stop the operation of the moving machine and minimize the delay in the time required to stop the moving machine.

In such sequence control, the idea of performing stop control by switching the stop control program under weather conditions, that is, in fine weather and in rainy weather, has never been known.

Means for Solving the Problem In the stop control of the coke oven moving machine by the sequence control device in which the control program is incorporated, it is possible to accurately stop at the destination even in rainy weather, and the delay of the time required until the moving machine stops As a result of various investigations, we set a braking pattern in fine weather and in rainy weather to minimize it.
It was clarified that the above object can be achieved by switching the braking pattern according to the weather condition, and the present invention was reached.

That is, the present invention is a method for stopping a coke oven moving machine at a target position according to a stop control program of a sequence control device, based on position information from a position detection device, speed information from a speed detector, and information such as a stop target position. In, in the stop control program, a clear weather mode and a rainy weather mode having different deceleration start positions are set in fine weather and in rainy weather, and the clear weather mode and the rainy weather mode are switched depending on weather conditions.

In the present invention, the stop control program is set to a clear weather mode and a rainy weather mode having different deceleration start positions in fine weather and rainy weather, and the clear weather mode and the rainy weather mode are switched depending on weather conditions. The deceleration is started early in anticipation of the slip of, and the mobile machine can be accurately stopped at the target position. Further, since the stop control in the rain mode is used only in the rain, the kiln start-up delay can be minimized as a whole.

Example 1 Example 1 FIG. 1 shows a system configuration when the present invention is applied to a coal-charging vehicle for a coke oven. FIG. 2 is a flow chart for explaining the operation of FIG. 1, and FIG. 3 is an explanatory view of a stop control pattern in which voltage control and thruster brake are combined.

In FIG. 1, (1) is a sequence control device, which inputs the rotation speed of the position detection touch roller (2) provided on the coal charging vehicle in contact with the running rail (3), from the reference point on the furnace. The absolute address position of the coal car is grasped on a 5 mm pitch based on the distance. (4) is a striker installed at several places on the furnace. When the non-tact switch (5) installed on the coal charging vehicle detects the striker (4), the signal is input to the sequence controller (1) to correct the position. Be done.

(6) is a console, and sets the coke oven group, the coal tank used, and the first charging kiln number in the sequence controller (1). In addition, a start command and a stop control program switching command can be input to the sequence control device (1) from the console (6) according to weather conditions.

The sequence control device (1) incorporates a series of control programs such as running and stopping control of the coal charging vehicle.
In the stop control program, a rainy weather mode and a clear weather mode in fine weather are set, and the rainy weather mode and the clear weather mode are switched by a stop control program switching command from the operation console (6).

(7) starts and stops the traveling control device and the traveling drive motor (8) for the coal-coated vehicle. (9) is a primary voltage control device for the motor (8), which controls the primary voltage of the motor (8). (10) is the secondary resistor for thruster brake, (1
1) is a speed detector consisting of a pulse generator, (1
2) is a coal receiving completion signal.

Next, the control operation of the coal car will be described with reference to FIG.

In the coal car, the operator inputs the initial setting of the coal coke oven gang, the coal tower coal tank, and the first coal-fired kiln number to the sequence controller (1) via the operator console (6), and the start command is issued. When input, it travels toward the quartz tower and stops at the set coal receiving position of the coal tower coal tank. The stop control program during traveling is selected in advance from either the clear weather mode or the clear weather mode depending on the weather conditions.

The stop control program, as shown in FIG. 3, when the target point x of受炭position of coal tower coal bath set are so Tansha reaches the first deceleration point x ₁ of L ₁ before, the primary voltage control device The primary voltage of the motor (8) is controlled by (9) to reduce the traveling speed to 60%. Next, when the target point x reaches the second deceleration point x ₂ of the L ₂ front, by controlling the primary voltage of the motor (8) by the primary voltage control device (9), for reducing the traveling speed to 10%. The deceleration is performed while feeding back the traveling speed detected by the speed detector (11) to the primary voltage controller (9). Further extending from the target point x in L ₃ before the third deceleration point x _3, decelerated by controlling the primary voltage of the motor (8) by the primary voltage control device (9), speed detector (1
When the detection speed of 1) reaches 5%, the secondary resistor (10) for thruster brake is activated and the coal car is stopped.

The distance between L ₁ and L _{2 in} this case is different in fine weather and in rainy weather. An example is shown in Table 1.

The distance L _{1 to} L ₃ varies depending on the type of mobile machine, and also for the same type of mobile machine depending on the type of coke oven and the manufacturer of the mobile machine.
Each may be determined by a field test.

When the coal car stops at the coal receiving position, it issues a cut gate open signal for the coal tank and starts coal receiving. When the hopper of the coal car is full, a cut gate closing signal is issued and the coal reception is completed. Then, when the coal receiving completion signal (12) is input to the sequence control device (1), the coal charging vehicle starts traveling toward the charging kiln and reaches the first deceleration point x ₁ before L ₁ from the charging kiln. When it reaches, the primary voltage controller (9) controls the primary voltage of the motor (8) to reduce the traveling speed to 60%. Then the charging kiln reaches the L ₂ second deceleration point x ₂ of the front, by controlling the primary voltage of the motor (8) by the primary voltage control device (9),
Reduce the running speed to 10%. Further extending from the loading kiln L ₃ third reduction point x ₃ in front, the detection rate of deceleration by controlling the primary voltage of the motor (8) by the primary voltage control device (9), the speed detector (11) When it reaches 5%, the secondary resistor (10) for the thruster brake is activated and the coal car is stopped exactly at the charging kiln position.

When the coal car stops at the charging kiln position, coal charging work is performed, and one cycle of work is completed. When the charging work is completed, the driver inputs a start command to the sequence control device (1). When a start command is input, 5 is added to the initially set kiln number n to update the kiln number and start traveling to the coal tower. After that, the charcoal work is performed by repeating this until the kiln removal work is completed.

In addition, in the above example of the coal charging vehicle, the touch roller system is used as the traveling position detection device, but a system in which the stator on the furnace is detected by the vehicle top and counted can also be used. Further, although the primary voltage control and the thruster brake system are used for the speed control, any of an inverter system, a truck brake system and the like may be adopted. Furthermore, if it suddenly starts to rain during the coal charging operation, the stop control program may be switched from the fine weather mode to the rainy mode at that time.

In this way, by switching the stop control program of the mobile machine between the fine weather mode and the rainy mode according to the weather conditions, it is possible to accurately stop at the target point even during rainfall. Further, the delay of the kiln removal work time due to this can be suppressed to a minimum.

Example 2 The thruster control of the coal car described in Example 1
Targeted stop according to the weather conditions for each of the cases where the furnace height is 6000 mm, the furnace width is 450 mm, the furnace length is 15560 mm, and the coke furnace group has 106 furnace chambers and operates in fine weather mode and rain mode shown in Table 1. The stop accuracy to the position is measured and the target ±
The error occurrence rate that cannot be stopped within 20 mm was calculated. Table 2 shows the results.

Also, for each of the fine weather mode and the rainy mode,
The time required from the arrival at the first deceleration point to the stop at the target point was measured, and the average time was calculated. As a result, 22 in clear weather mode
In contrast to seconds, the rain mode was 30 seconds, a difference of 8 seconds.

As shown in Table 2, when the stop control is performed in fine weather mode in rainy weather, the stop error rate to the target point is 5
%, And 0% in all other cases. This means that by switching between fine weather mode and rainy weather mode in accordance with the weather conditions, it is possible to accurately stop at the target point and minimize the kiln-delay delay time due to mode switching.

As described above, according to the method of the present invention, the coke oven moving machine can be accurately stopped at the target point even during rainfall by switching the stop control program between the fine weather mode and the rainy mode according to the weather conditions. You can
Also, the kiln start-up delay time due to mode switching can be suppressed to a minimum. Moreover, it can be installed on an existing mobile machine at a low cost, and it is of great industrial value in terms of labor saving of the coke oven.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a system configuration diagram when the present invention is applied to a coal car, FIG. 2 is a work flowchart of the coal car, and FIG. 3 is a stop control in which primary voltage control and thruster brake are combined. It is explanatory drawing of a pattern. 1 ... Sequence control device, 2 ... Touch roller, 3 ... Traveling rail, 4 ... Striker, 5 ... Non-tact switch, 6 ... Operator console, 7 ... Travel control device, 8 ... Motor, 9 ...... Primary voltage control device, 10 ...... Secondary resistor, 11 …… Speed detector, 12 …… Coating completion signal,

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-1-266189 (JP, A) JP-A-60-170691 (JP, A) JP-A-63-202690 (JP, A) JP-A-60- 205615 (JP, A) JP-A-63-202689 (JP, A)

Claims (1)

(57) [Claims] 1. A method of stopping a coke oven moving machine at a target position according to a stop control program of a sequence control device based on position information from a position detection device, speed information from a speed detector, and information such as a stop target position. In the above, a stop control method for a coke oven moving machine, characterized by setting a clear weather mode and a rainy weather mode having different deceleration start positions in fine weather and rainy weather as a stop control program, and switching between the clear weather mode and the rainy weather mode depending on weather conditions.