CN110834882B

CN110834882B - Crawler-type moving conveyer belt equipment

Info

Publication number: CN110834882B
Application number: CN201811276120.9A
Authority: CN
Inventors: C·霍根多恩
Original assignee: Keestrack NV
Current assignee: Keestrack NV
Priority date: 2018-08-17
Filing date: 2018-10-30
Publication date: 2022-01-18
Anticipated expiration: 2038-10-30
Also published as: CN110834882A; DE102018120068A1; DE102018120068B4

Abstract

The invention relates to a crawler-type moving conveyor belt device having at least one electrically operated drive unit M1, M2 and having at least one electrical energy store BP for driving the conveyor belt device ST.

Description

Crawler-type moving conveyer belt equipment

Technical Field

The invention relates to a crawler-type moving conveying belt device.

Background

A crawler-type moving conveyor belt device is also called a Stacker conveyor or, in english, a Stacker (Stacker). It is used in particular in gravel plants and quarries. The stacking conveyor or conveyor belt arrangement has a very favourable operating cost compared to wheel loaders. The cost per ton of material transported is more favourable than a wheel loader by a factor of 4, in conversion to stockpiling power of 500000 tons.

A significant advantage of the movable conveyor belt arrangement over stockpiling in wheel loaders is a high operational safety. The danger of driving through the bulk material is eliminated. Only a small degree of bulk material separation occurs by carrying with the increased dump height. A large stacking capacity is achieved in the deflected mode of operation of, for example, 180 °. Tracked movement can be achieved for use in uneven terrain. Yet simple to load and transport. By means of the folding mechanism, longer conveyor belts can also be folded to a small transport length and also to a small height. By means of the crawler-type moving drive, in addition to an advantageous transport size and easy loading, it is mentioned that, unlike wheel loaders, no material compression of the conveyor belt arrangement takes place.

Usually the conveyor belt device is driven by means of a hydraulic motor. An electric drive can also be used, in which case, of course, a generator is required for autonomous operation. The generator is driven by a diesel engine, so that in such a conveyor belt system an internal combustion engine is required, by means of which the required electrical energy is generated. Such conveyor belt devices continuously generate discharge during operation. In addition, the required power fuel is provided. The efficiency of the internal combustion engine is low.

Disclosure of Invention

The object of the invention is to provide a crawler-type moving conveyor belt system which can operate autonomously and in a resource-efficient manner.

To this end, the invention proposes a crawler-type moving conveyor belt system having at least one electrically operated drive unit and having at least one electrical energy store for driving the conveyor belt system, characterized in that the conveyor belt system has a charging end and a discharging end, wherein a photovoltaic system is arranged between the charging end and the discharging end of the conveyor belt, as a system for extracting electrical energy from solar energy for the primary use of the conveyor belt system, wherein the photovoltaic system spans the conveyor belt of the conveyor belt system in a tunnel-like manner as a system for extracting electrical energy from solar energy.

The crawler-type moving conveyor belt device has at least one electric drive unit and at least one electrical energy store for driving the conveyor belt device.

It relates to a purely electrically operated conveyor belt device. No generator, and in particular no internal combustion engine, is provided on the conveyor belt device, so that no combustion gases are present on site during operation of the conveyor belt device. The crawler-type moving conveyor belt apparatus is very environmentally friendly, especially in terms of its discharge. Furthermore, it is considerably quieter by purely electric operation than a conveyor belt system operated with an internal combustion engine.

The drive unit is in particular a direct drive. As far as possible, the hydraulic motor is abandoned if a purely rotary motion is required. The invention does not exclude that, for example, for moving in and out of the displacement cylinder, the electric drive is coupled to the hydraulic pump, i.e. an electrohydraulic drive is additionally present. Preferably, however, the actual conveyor belt is driven directly by the electric drive unit. Due to the usually high rotational speed of the drive unit, a corresponding rotational speed or torque converter, i.e. a transmission or a torque converter, can be provided.

The crawler chassis of the conveyor belt device can be driven in a purely electric manner, like the conveyor belt itself of the conveyor belt device. The further consumers of the conveyor belt device are also driven in a purely electrical manner.

In a particular embodiment of the invention, the conveyor system has at least one system for extracting electrical energy from solar and/or wind energy. The conveyor belt equipment is to obtain regenerated energy. The at least one memory for driving the conveyor belt device stores the regenerated electrical energy directly obtained at the conveyor belt device in order to operate the conveyor belt device from the memory.

The storage for running the crawler-type moving conveyor belt device must be sufficiently dimensioned in order to be able to achieve continuous running. Preferably, the voltage across the electrical energy store is a direct voltage of more than 150V, in particular more than 300V. In the case of this voltage, the required power can be delivered in combination with the corresponding current. The voltage is much higher than the voltage used in a typical memory or energy storage.

The total weight of the conveyor belt device can be greater than 12 tons, wherein the crawler chassis also carries large and thus bulky and heavy storage without problems.

In a particularly advantageous embodiment, the conveyor belt system has a mast as a component of a wind power installation for extracting electrical energy. The rotor is arranged on the pole. The axis of rotation of the rotor may be horizontal or vertical. According to the invention, it is advantageous if the mast is reversible for transporting the crawler-type moving conveyor belt device to another point of use.

Preferably, a wind power installation is arranged on the tipping end of the conveyor belt installation. With a very long conveyor belt, the wind power installation on the dump end has a sufficient height so that the wind at this height can be utilized for driving the wind power installation. The wind speed is greater in this higher altitude than in the near-ground region.

It is to be taken into account that such conveyor installations are usually not operated 24 hours a day, so that sufficient energy can be stored during periods of no operation. The operation of the wind power installation is completely independent of the operation of the crawler-type moving conveyor belt installation. The wind power plant can work day and night. The wind power installation can also be moved into an advantageous position by a corresponding orientation of the conveyor belt installation or the mast.

In one embodiment of the invention, the conveyor belt device has a photovoltaic device. The photovoltaic apparatus may be disposed between the loading end and the dumping end of the conveyor belt. In the context of the present invention, the photovoltaic system is a system for extracting electrical energy from solar energy. The energy obtained by means of the photovoltaic installation is used primarily by the conveyor installation. The first use means that auxiliary consumers can also be supplied with power by the photovoltaic system. The main share of the energy is needed for running the conveyor belt. For this purpose, the regenerated energy is mainly used.

Since the conveyor belt extends rather high and is furthermore not shaded in the quarry or building site, the photovoltaic installation can tunnel-like across the conveyor belt. In response to the position of the sun, it is possible to use very efficiently not only the solar rays incident laterally, but also rays incident from above. With a tunnel-like spanned conveyor belt, the possibility of energy harvesting is achieved every day and in the presence of the sun.

In one embodiment of the invention, the photovoltaic system is arranged on a housing surface of the conveyor belt system. The housing surface is, for example, a housing of the drive unit. Which here may be the side wall or the upper side. This housing surface is normally not utilized and serves to shield the components of the conveyor belt device. In the present invention, these faces satisfy another function. The side of the conveyor belt is also understood to be, for example, a housing surface. It is therefore not absolutely necessary that the photovoltaic installation on the upper side spans the conveyor belt in a tunnel-like manner. It is also possible for the photovoltaic modules to be located only laterally on the conveyor belt. The photovoltaic modules can project upwards here completely beyond the height of the conveyor belt and thus receive the conveyor belt between them. Thereby forming a trench to some extent between the opposing photovoltaic modules.

It is possible to fasten the photovoltaic module such that its position relative to the conveyor belt device can be changed. The photovoltaic module can thus be adjusted to the sun position. However, it is also conceivable for the photovoltaic module to be deflected from the transport position into the operating position. In the transport position, the photovoltaic module takes up as little space as possible, while in the operating position it is inclined as far as possible and oriented in the ideal manner toward the sun.

It is possible for the photovoltaic module to be covered when not in use or under particular operating conditions. For this purpose, corresponding covers can be provided on the conveyor belt device in order to protect the photovoltaic modules.

In one embodiment of the invention, the control unit is designed to control: the energy supply for a first electric motor of a conveyor belt of the conveyor belt device and the energy supply for at least one further electric motor of the crawler chassis. The motors for the track undercarriage and for the conveyor belt are the drive devices with the greatest energy requirement. The control unit is designed to control the energy flow from the battery storage. It is necessary to control not only the charging current but also the voltage. In particular, it is to be noted that high temperature fluctuations can occur as a result of the charging and discharging of the battery. The control unit is designed to maintain a limit value with respect to the thermal load of the battery and to provide only the maximum permissible power for the respective electric motor.

Within the scope of the invention, the conveyor belt device is never used in isolation, but is loaded in any way. Other work machines, which for example also require energy, are connected upstream of the conveyor belt device.

It is possible to integrate a conveyor belt device, which itself generates renewable energy, into the upper-level system of an off-road production line. It is possible that the electrical storage is supplied with electrical energy by other work machines. For this purpose, the memory has a suitable interface.

The memory may be coupled to a movable or stationary source of electrical energy, for example. The stationary source of electrical energy is the power supply network of the energy provider. The mobile electrical energy source is, for example, a mobile dc generator or a separate battery, by means of which the own memory of the conveyor system can be charged.

It is possible to output energy to further consumers via the interface, as long as an energy excess occurs at the conveyor belt device. If the conveyor belt device is not to consume energy itself, for example on weekends or on some days, and if its own memory is to be sufficiently charged in this case, the energy excess can be output via the above-described interface to a further consumer.

The further consumer may for example be a movable source of electrical energy. Such an energy source is in particular a rechargeable battery and can output energy at a later point in time with regard to its function as an energy source. With such a movable energy source, which is separated from the interface of the conveyor belt device after charging, further electrical consumers at the point of use of the conveyor belt device can subsequently be supplied with power. It is often feasible to transport heavy, mobile energy sources also, for example, with wheel loaders on a construction site.

Further electrical consumers at the site of use of the conveyor belt system are in particular electrically driven caterpillar-type mobile screening systems, electrically driven caterpillar-type mobile jaw crusher systems, electrically driven caterpillar-type mobile impact crusher systems or else other caterpillar-type mobile electric conveyor belt systems. The electrical consumers described above form an off-road production line within the meaning of the invention. For this purpose, other electrical consumers (e.g., electrically operated excavators or other construction vehicles, such as wheel loaders or passenger cars) can also be included.

By means of the available electrical energy, small consumers, such as computers, mobile telephones and the like, which are operated as so-called mobile batteries, can be charged, as can battery-operated electric tools.

The concept of a track-mounted moving conveyor installation operating purely electrically is in particular part of a higher-order production line, in which communication between different electrical consumers and energy distribution depending on the needs are possible. The crawler-type moving conveyor belt system can be connected to a superordinate control system or can itself comprise such a control system in order to assume control functions with respect to other electrical consumers. When a plurality of control systems exist, wireless data exchange between the control systems can be performed. According to the Master-Slave-Prinzip principle, one of the control systems may be a boot system, to which the other control systems are subordinate. The redundancy of the system improves operational safety. By each control system being either master or slave, a diverse combination of electrically operated consumers of off-road production lines is envisaged.

Drawings

The invention will be explained in detail below with the aid of embodiments shown in the schematic drawings. The figures show:

FIG. 1 is a side view of a conveyor belt apparatus;

fig. 2 is a view of the conveyor belt device with solar modules from above;

FIG. 3 is an illustration of power electronics of the conveyor belt apparatus; and

fig. 4 shows a production line with a plurality of electrical consumers.

Detailed Description

Fig. 1 shows a purely schematic illustration of a conveyor belt device ST. The conveyor system ST is crawler-mounted and has a chassis 1, which is carried by a crawler chassis 2. The chassis 1 in turn carries all the superstructure 3. The conveyor belt 4 is supported by the chassis 1 by

adjustable supports

5, 6. The conveyor belt 4 has a feed end 7 and a higher disposed dump end 8 for dumping material received by the conveyor belt 4 on the feed end 7.

The conveyor belt device ST is operated electrically and for this purpose has an electrical energy store BP for driving the conveyor belt device ST. The memory BP is provided on the chassis 1.

The conveyor system ST has a system for extracting electrical energy from wind energy. This relates to a wind power installation WM with a mast 9. A mast 9 is provided on the upper end of the conveyor belt device ST, i.e. on the tipping end 8. The pole 9 can be folded back so that it does not project upwards beyond the conveyor belt 4, in particular for transport. The rotor blade 10 of the wind power installation WM can also be turned back. Furthermore, the pole 9 can be telescopic and/or collapsible in a manner not shown in detail, so that it has a significantly greater length in the erected position than in its collapsed or non-collapsed transport position. The conveyor system ST is designed for loading onto a transport vehicle and transport on public roads to another point of use. The conveyor system ST is also very compact with the additional and in particular attachable wind power installation WM.

Furthermore, the conveyor system ST has a photovoltaic system PV as a system for extracting electrical energy from solar energy. The photovoltaic installation PV is arranged on the conveyor belt 4 between the charging end 7 and the dumping end 8. The photovoltaic installation PV can cross the conveyor belt 4 tunnel-like. The photovoltaic system PV can, for example, span the conveyor belt 4 in an arcuate manner, as is shown in fig. 2.

In the case of larger solar panels 11, it is also possible: which for example in cross section is triangular or trapezoidal shaped above the conveyor belt 4. The photovoltaic modules 11 can also only partially surround the area above the conveyor belt 4, so that the area above the conveyor belt 4 remains partially open. An advantage of arranging the solar panels 11 on the conveyor belt 4 is that there is less shading in this area.

Additionally, the photovoltaic modules 11 of the photovoltaic system PV are arranged on the housing surface 12 of the conveyor system ST. The housing face 12 is all the face for enclosing the components of the conveyor belt device ST. In particular above and to the side of all the superstructures 3 on the chassis 1 of the conveyor installation ST.

In particular, the region next to the chassis 1 or crawler chassis 2 and furthermore the conveyor belt 4 itself also counts as a superstructure 3. The photovoltaic modules 11 can be arranged in particular on the side of the conveyor belt 4 or on a frame which carries and guides the conveyor belt. The position of the photovoltaic modules 11 may be adjustable relative to the conveyor belt device 1.

The electrical energy store BP enables battery operation of the conveyor system ST. The run time depends on the capacity of the memory BP. In order for the memory BP to output the required power, the voltage is more than 150 volts dc and especially more than 300V dc. This involves a high-voltage accumulator. For 2 hours of operation, the capacity can be 24kWh with 614V dc on the electrical storage BP.

The conveyor system ST has power electronics for actuating the electric drives M1, M2, M3 of the conveyor system ST, as is shown by way of example in fig. 3. The power electronics are the central component of the drive train of the conveyor belt apparatus ST. The power electronics comprise a central electronic control unit PLC configured to control the energy supply of the first electric motor M1 for the main drive of the conveyor belt device ST and to control the energy supply of another electric motor M2, for example for the crawler chassis 2. The conveyor system ST can have a further motor M3 and an auxiliary drive, which is referred to as a further electrical load Mn. The further electrical consumers Mn are in particular the on-board electrical system of the conveyor system ST and also small consumers, such as controllers, sensors, actuators, monitors, etc., which are connected to the on-board electrical system. These consumers Mn are referred to in fig. 3 as Mn DC, i.e. as direct current consumers. Because the small consumers operate at a significantly lower voltage relative to the voltage of the electrical memory BP of the conveyor belt device, a transformer INV is required. The transformer for the small consumer is a DC-transformer. Additional transformers can be provided for further consumers, for example for supplying the on-board electrical system of the conveyor system ST. The electronic control unit PLC is also a consumer supplied with power via the on-board electrical system. The voltage of the on-board electrical system is 24V. For example, the worklight is also connected to the on-board power supply.

The transformers are denoted collectively in fig. 3 by INV, independent of their construction, their power or their function (DC-DC, DC-AC).

The motors M1, M2, M3 are operated with 400V ac in this embodiment. The motor M1 may have a power of 20kW to 40kW per the structural size of the conveyor belt arrangement and each motor M2 for the track chassis 2 has a power of, for example, 15kW each.

The DC-AC-transformer INV is connected upstream of the DC conductor of the conveyor belt apparatus ST. For the case of an empty electrical storage BP, the transformer INV may be bypassed and the alternating current is obtained directly from the grid AC, e.g. 380V 50 Hz. The power electronics with the control unit PLC controls the corresponding energy delivery. The dashed lines are control lines. The solid line is a current-carrying conductor for direct current DC.

By means of the conveyor system ST, mobile electrical consumers, such as mobile radio devices, laptops, battery-operated tools, etc., can be charged via the on-board electrical system. In a further sense, all the following consumers can be counted as movable electrical consumers: the consumers are not permanently connected to the conveyor belt device ST or are not necessary for operating the conveyor belt device ST, and the conveyor belt device ST is used as an energy source for charging the individual electrical stores. The movable electrical consumer can therefore also be an electric vehicle, in particular a construction vehicle, for example an electrically operated wheel loader.

The conveyor system ST can be coupled to different energy sources, for example, when the electrical energy available at the conveyor system ST is not sufficient for operation. The further energy source may be a fixed energy source AC, for example a fixed power grid. Another energy source can be an additionally provided electrical accumulator RBP, by means of which the accumulator BP on the conveyor belt device ST is charged or by means of which the conveyor belt device ST is operated. The conveyor system ST can also be connected to a mobile generator which preferably receives electrical energy from a regenerative energy source (wind, sun).

The interface of the conveyor system ST can also be used to output excess energy, which is obtained by the photovoltaic system PV or the wind energy system WM and which cannot be stored in its own storage BP, to a further electrical storage RBP, to the grid AC or to a further load Mn. The present invention relates to a consumer Mn at the point of use of the conveyor system ST. The direction of the arrows of the current conductors shows: for example, the memory BP itself and the additional memory RBP can be charged and discharged and, more precisely, by the conveyor system ST itself. The memory BP can be charged by the on-board charger OBC via the network AC of the network operator. Other energy sources, such as a mobile generator, may also be coupled to the on-board charger OBC.

The electronic control unit PLC shown in fig. 3 is permanently in contact with a vehicle control device, not shown, and receives instructions to be implemented and, furthermore, information from other controllers from said vehicle control device.

The conveyor installation ST is in particular part of a production line in which an installation for comminuting and grading or screening material is connected upstream of the conveyor installation ST. In particular, the further load carrier is thus an electrically driven crawler-type moving screening plant SC, an electrically driven crawler-type moving jaw crusher plant JC, an electrically driven crawler-type moving impact crusher plant IC or also a further conveyor belt plant ST. Fig. 3 shows that connections can be established with other devices in the production line. The control is carried out by a control unit PLC. The communication may be wireless.

Fig. 4 shows that each of these devices WL, JC, IC, SC, ST, XC of the exemplary production line has a separate control unit PLC1 to PLC 6. The control units PLC1 to PLC6 are connected via a wireless communication interface. Electrical energy may be transferred from one of these devices to another. Solid line symbolizes the electrical supply conductors between the devices. The arrows show that the transfer can take place in different directions. With reference to the invention, the electrical energy obtained at the conveyor belt device ST can be transferred to the other illustrated devices.

Reference numerals:

1-base plate

2-crawler chassis

3-superstructure

4-conveyer belt

5-support piece

6-support

7-4 charging end

8-4 dump end

9-pole

10-rotor blade

11-solar panel

12-shell surface

AC-grid

BP-electric memory

DC-conductor for direct current

IC-impact crusher device

INV transformer

JC-jaw crusher equipment

M1 electric drive

M2 electric drive

M3 electric drive

Mn-electric drive

OBC-vehicle charger

PLC electronic control unit

PLC 1-electronic control Unit

PLC 2-electronic control Unit

PLC 3-electronic control Unit

PLC 4-electronic control Unit

PLC 5-electronic control Unit

PLC 6-electronic control Unit

PV-photovoltaic device

RBP-external electrical storage

SC-screening device

ST-conveyor belt device

WL-wheel loader

WM wind energy plant

XC-digger

Claims

1. Crawler-type moving conveyor belt device with at least one electrically operated drive unit (M1, M2) and with at least one electrical energy store (BP) for driving the conveyor belt device, characterized in that the conveyor belt device has a charging end (7) and a dumping end (8), wherein a photovoltaic device (PV) is arranged between the charging end (7) and the dumping end (8) of the conveyor belt (4) as a device for extracting electrical energy from solar energy for the primary use of the conveyor belt device (ST), wherein the photovoltaic device (PV) as a device for extracting electrical energy from solar energy tunnels across the conveyor belt (4) of the conveyor belt device (ST).

2. Conveyor belt device according to claim 1, characterized in that the electrical energy store (BP) is configured for storing regenerated electrical energy obtained by means of the photovoltaic device (PV).

3. Conveyor belt device according to claim 1 or 2, characterized in that the conveyor belt device has at least one wind energy installation (WM) as an installation for extracting electrical energy from wind energy, wherein the electrical energy store (BP) is designed to store regenerated electrical energy obtained by means of the wind energy installation (WM).

4. A conveyor belt apparatus according to claim 1 or 2, characterized in that the voltage over the energy storage (BP) is a direct voltage of more than 150V.

5. A conveyor belt apparatus according to claim 1 or 2, characterized in that the conveyor belt apparatus is free of an internal combustion engine.

6. A conveyor belt apparatus according to claim 3, characterized in that the wind power installation (WM) has, as an installation for extracting electrical energy, a mast (9) which is tiltable back for the transport of the crawler-type moving conveyor belt installation (ST).

7. Conveyor belt device according to claim 6, characterized in that the wind energy device (WM) is arranged at the tipping end (8) of the conveyor belt device (ST).

8. A conveyor installation according to claim 1, characterized in that, as a primary installation for extracting electrical energy from solar energy for use in the conveyor installation (ST), further photovoltaic installations (PV) are arranged on the housing surface (12) of the conveyor installation (ST).

9. Conveyor belt device according to claim 1 or 2, characterized in that the photovoltaic device (PV) has at least one photovoltaic module (11), wherein the position of the photovoltaic module (11) relative to the conveyor belt device (ST) is changeable.

10. Conveyor belt device according to claim 8, characterized in that the further photovoltaic device (PV) has at least one photovoltaic module (11), wherein the position of the photovoltaic module (11) relative to the conveyor belt device (ST) is changeable.

11. A conveyor belt apparatus according to claim 1 or 2, characterized in that a control unit (PLC) is configured for controlling: energy supply for a first electric motor (M1) of a conveyor belt of the conveyor belt arrangement (ST) and for at least one further electric motor (M2) of a track chassis (2).

12. A conveyor system according to claim 11, characterized in that the conveyor System (ST) can be coupled to a movable electrical energy source or a stationary electrical energy source (AC, RBP), wherein energy can be received by an electrical energy store (BP) of the conveyor System (ST) and electrical consumers of the conveyor System (ST) or, in the event of an energy surplus of the conveyor System (ST), can be output from the conveyor System (ST) to further consumers.

13. A conveyor apparatus according to claim 12, characterized in that the movable electrical energy source is configured to output the electrical energy generated by the conveyor apparatus (ST) to a further electrical consumer (Mn) at the point of use of the conveyor apparatus (ST) when required.

14. Conveyor installation according to claim 13, characterized in that the further electrical consumers at the location of use of the conveyor installation (ST) are an electrically driven crawler-type mobile screening installation (SC), an electrically driven crawler-type mobile jaw crusher installation (JC), an electrically driven crawler-type mobile impact crusher Installation (IC) or a further conveyor installation (ST).

15. A conveyor apparatus according to claim 13 or 14, characterized in that one further electrical consumer is a movable electrical consumer.

16. A conveyor belt apparatus according to claim 1 or 2, characterized in that the voltage over the energy storage (BP) is a direct voltage of more than 300V.