JPS60252536A - Emergency operation controlling device for automatic traveling tripper - Google Patents

Abstract

PURPOSE:To enable automatic traveling of a tripper by means of an emergency electric source even when the supply of a normal power source to said tripper has failed, by providing an emergency power source which is connected to a pulley driven by a belt conveyor on the ground and which converts the power of rotation of said pulley into electric power. CONSTITUTION:A pulley 3 on a tripper 2 is rotated by a belt conveyor 1, and a generator (an emergency power source) 5 which converts this power of rotation into electric power, is connected to the pulley 3. Switchover devices 7, 8, 11, 12 carry out switchover between a normal power source supplied from on the ground and an invertor 6 which is connected to the output side of the generator 5. An induction motor 9 for the traveling of tripper 2, is connected so as to receive the supply of both power sources via these switchover devices. And, when the supply of a normal power source to the induction motor 9 has failed, the switchover switches 7, 11 are turned on while switches 8, 12 are turned off, to drive the induction motor 9 by means of the generator 5, enabling the automatic traveling of the tripper 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an emergency operation control device for a self-propelled tripper that is capable of self-propelled even when the regular power supply is lost due to a power outage or the like.

[Technical background of the invention]

FIG. 7 is a configuration diagram showing a conventional operation control device for a self-propelled tripper. A self-propelled tripper is used to discharge coal, etc. transported by a belt conveyor from the belt conveyor to a silo, etc. The belt conveyor 1 on the ground is installed on a tripper 2, and the belt conveyor 1 It is connected to a driven pulley 3.

Transported materials such as coal are discharged from the conveyor 1 by this tripper 2. The tripper 2 is self-propelled by running wheels 4 and moves along the belt conveyor 1 to any desired location. Running wheel 4
is driven by an induction motor 9 whose drive is controlled by a contactor 8.
Power is supplied from the ground power supply equipment feeder 15 through the entire cable 14 using a regular power supply. Power is supplied from the regular power source after the power is received by the power receiving device 10. A control circuit 13 is connected to the output side of the power receiving device 10 via a contactor 12, and the power is supplied from the regular power source from the ground. If the power supply from the power supply is normal, this control circuit 1
3 controls the opening and closing of the contactor 8.

[Problems with background technology]

In this way, in the conventional circuit, power is supplied from the ground to the Tritsuba 2 through a cable, so if the power supply from the regular power source is interrupted due to a break in the cable 14 or a ground fault, etc., the power supply to the traveling electric motor 9 is Power cannot be supplied. As a result, the belt conveyor 1 becomes unable to run and cannot be discharged to any desired location.
Even if belt conveyor J is operating normally, the operation of belt conveyor J has to be completely stopped.

If the tripper 20 is unable to run in the event of an emergency where the regular power supply is lost in this way, the influence on the conveyor system will be severe and the entire system will be affected. In addition, since the tripper 2 moves by itself, the power supply cable 14
is susceptible to changes in tension and mechanical stress,
There are problems with strength compared to cables installed in fixed locations to feed belt conveyor motors.

Therefore, in a power supply system for a system using a conveyor and a tripper, power supply to the tripper is a weak point.

[Purpose of the invention]

This invention was made in order to eliminate two consecutive drawbacks, and its purpose is to provide an emergency operation control system for a self-propelled tripper that can self-propel even when the regular power supply to the tripper is lost. It is on offer.

[Summary of the invention]

In order to achieve the above object, this invention includes an emergency power source that is installed on a self-propelled tripper and connected to a pulley driven by a belt conveyor on the ground, and that converts the rotational power of this pulley into electric power. An inverter device connected to the output side, a switching device that switches between the inverter device and the regular power source supplied from the ground, and an inverter connected to receive power from both the emergency power source and the regular power source via this switching device. The invention is characterized in that the induction motor is equipped with an induction motor, and when the regular power source is lost, the induction motor is driven by an emergency power source so that it can run on its own.

[Embodiments of the invention]

FIG. 1 is a block diagram showing an embodiment of the present invention. Note that the same parts as shown in FIG. 7 are given the same reference numerals, and the explanation thereof will be omitted. The conventional device shown in FIG. 7 includes a generator 5, an inverter 6, a switching main contactor 7, and a control switching device 11.
is added.

The pulley 3 is rotated by a belt conveyor 1 on the ground, and a generator 5 is connected to the pulley 3. Therefore, when the goo 1J3 is rotated by the belt conveyor 1 on the ground, the rotational power thereof is converted into electric power by the generator 5.

In this way, the generator 5 constitutes an emergency power source.

When the power supply from the ground side is lost, the power to the induction motor 9 can be switched to the emergency power source by closing the switching device 7 and opening the switching device 8.

Emergency power is also supplied to the control device 13 by closing the switching device 11 and opening the switching device 12.

In addition, during emergency operation, an inverter device 6 connected to the generator 5 applies an AC voltage of variable voltage and variable frequency to the induction motor 9 to cause the tripper 2 to run by itself.

FIG. 2 and FIG. 3 are diagrams showing a specific configuration of the inverter device 6, and the configuration as shown in the figures is obtained by 50 types of generators constituting the emergency power source.

The example shown in FIG. 2 uses a DC generator as the generator 5, and is composed of a capacitor 16 and an inverter section 17. The example shown in FIG. 3 uses an AC synchronous motor as the generator 5, and has a configuration in which a rectifier j8 is added to the configuration shown in FIG.

Further, a similar circuit configuration can be applied when the generator 5 is a DC generator.

FIG. 4 is a block diagram showing another embodiment of the present invention, and is an example in which the switching devices 7 and 8 shown in FIG. 1 are provided on the primary side of an inverter device 60. With this configuration, it is possible to operate at any frequency up to the maximum output frequency, that is, at any travel speed during regular power supply operation. In this way, by attaching an emergency power generator to the tripper, which is always installed on the tripper, self-propulsion becomes possible even if the regular power source from the ground is lost.

FIG. 5 is a diagram showing the relationship between the traveling speed (■) of the tripper and the required traveling torque T. In this way, the tripper is a load with so-called low torque characteristics.

Therefore, the relationship between the required running power P and the running speed V is as follows: P = 1・■T It represents the value of one pair that does not occur. Therefore, P = 2・■ ・・・・・・・・・
・(2) becomes. Here, 22Kl-T=constant.

FIG. 6 is a graph showing equation (2).

Therefore, the normal operating speed is VN, and the emergency operating speed is VE (
If VN>ME), the power required for driving is normally used,
For emergency use, PN and PE are used, respectively.As is clear from Figure 6, since PN>PE, the generator capacity can be selected to be smaller for PF and base, so it can be set smaller than the power supply capacity from the ground, PN. Note that the traveling speed vE in an emergency can be easily obtained by controlling the frequency and voltage of the inverter device 6.

In this way, the inverter device 6 is connected to the generator 5 to reduce the generator capacity. The pulley 3 is always installed in the existing tripper 2, and generally the capacity of the drive motor of the belt conveyor 1 is the same as that of the tripper 2.
Since the running capacity of the belt conveyor 1 is large compared to the running capacity of the belt conveyor 1, it is possible to install the device according to the present invention to an existing tripper if it is possible to supply the necessary running power PE in an emergency with the capacity of the drive motor of the belt conveyor 1. Become.

〔Effect of the invention〕

As explained above in detail based on the embodiments, in this invention, an emergency power source is provided which is connected to a pulley driven by a belt conveyor on the ground and converts the rotational power of this pulley into electric power. There is an advantage that the tripper can be self-propelled even when lost.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIGS. 2 and 3 are diagrams showing the detailed configuration of an innotetor device used in this invention, and FIG. 4 is a block diagram showing another embodiment of this invention. 5 is a diagram showing the relationship between the traveling speed of the tripper and the torque required for traveling, FIG. 6 is a diagram showing the relationship between the traveling speed of the tripper and the torque required for traveling, and FIG. The figure is a diagram showing the configuration of a conventional control device (Z). 1... Belt conveyor, 2... Tripper, 3... Pulley, 5... Generator (emergency? 1L source), 6... Inverter device j'4.7, 8, 11, 12...・Switching equipment f, 9・Visit electric hammer. Applicant's agent Kiyoshi Inomata [Figure 2 Figure 3 Figure 4 Figure 6 Traveling speed V

Claims (1)

[Claims] An emergency power supply that is installed on the self-propelled tripper and connected to the GooGoo driven by a belt conveyor on the ground and converts the rotational power of this pulley into electricity, an inverter device connected to the output side of this emergency power supply, and It is equipped with a switching device for switching between an inverter device and a regular power source supplied from the ground, and an induction motor connected to receive power from both the emergency power source and the regular power source via the switching device,
An emergency operation control device for a self-propelled tri-tsuba, characterized in that the induction motor is driven by an emergency power source to enable self-propulsion when the regular power source is lost.