Device for applying thick matter

Abstract

The invention relates to a device (100) for applying thick matter, comprising: - a first electrical consumer (1), - a second electrical consumer (2), - a first terminal (3) which can be connected to a first AC voltage network (200) with a first maximum output, - a second terminal (4) which can be connected to a second AC voltage network (300) with a second maximum output, - a first controllable switching means (5) which, depending on its switching position, electrically connects the second electrical consumer (2) to either the first terminal (3) or the second terminal (4), and - a control unit (6) for controlling the first controllable switching means (5).

Description

[0001] Device for discharging thick material

[0002] The invention is based on the objective of providing a device for discharging thick material that is as flexible as possible to operate.

[0003] The device for discharging thick material, for example a (vehicle-mounted) concrete pump, comprises: a first electrical load, for example in the form of an electric motor or a power converter, a second electrical load, for example also in the form of an electric motor or power converter, a first electrical connection that can be connected to a first, for example three-phase AC power network with a first maximum power, a second connection that can be connected to a second, for example three-phase AC power network with a second maximum power, a first controllable switching device that, depending on its switching position, electrically connects the second electrical load, in particular all-pole, either to the first connection or the second connection, and a control unit, for example in the form of a microprocessor-based control, for controlling the first controllable switching device.

[0004] In one embodiment, the control unit controls the first controllable switching device depending on the first maximum power and the second maximum power. Additionally, the control unit can further control the first controllable switching device depending on the respective maximum electrical power of the first electrical load and the second electrical load.

[0005] In one embodiment, the control unit controls the first controllable switching device depending on whether the first terminal is electrically connected to the first AC power supply or not, and / or whether the second terminal is electrically connected to the second AC power supply or not. For example, if the second terminal is not electrically connected to the second AC power supply, the control unit can control the first controllable switching device in such a way that it also electrically connects the second electrical load to the first terminal.

[0006] In one embodiment, the first maximum power is greater than the second maximum power. The first maximum power can, for example, correspond to a maximum deliverable current of 400 A, and the second maximum power can, for example, correspond to a maximum deliverable current of 125 A or 63 A. In one embodiment, the device for discharging thick material further comprises: a third electrical load, and a second controllable switching device which, depending on its switching position, electrically connects the third electrical load to either the first or the second terminal.

[0007] In one embodiment, the device for discharging thick material further comprises: a third connection which can be connected to a third AC power supply with a third maximum power, a third electrical consumer, and a second controllable switching device which, depending on its switching position, electrically connects the third electrical consumer either to the first connection or the third connection, or electrically connects the third electrical consumer either to the first connection, the second connection or the third connection.

[0008] In one embodiment, the device for discharging thick material further comprises: a third connection that can be connected to a third AC power supply with a third maximum power rating, a third electrical consumer, a fourth electrical consumer, a second controllable switching device that, depending on its switching position, electrically connects the third electrical consumer either to the first connection or the second connection, and a third controllable switching device that, depending on its switching position, electrically connects the fourth electrical consumer either to the first connection or the third connection.

[0009] The first switching device, the second switching device and the third switching device can, for example, each be mutually blocking contactors that switch all phases of a three-phase AC power network and the neutral conductor.

[0010] The first electrical consumer, the second electrical consumer, and the third electrical consumer can differ in their maximum electrical power.

[0011] High-performance equipment for discharging thick materials, such as truck-mounted concrete pumps, is preferably powered by a single high-capacity AC power supply. However, since this is not always available, the equipment must also function with lower-power AC power supplies. This is where multi-plug solutions become important, enabling flexible connection of the equipment to various available AC power supplies and maximizing overall power output. To avoid having to supply the full electrical power of each connection to a single electrical load, the invention provides for the situational interconnection of different electrical loads to one or more connections. According to the invention, this ensures that unsafe conditions are always prevented. For example, it prevents voltage from being present at unconnected connections.

[0012] The first connection is capable of receiving maximum electrical input power. Due to the fixed coupling of the first connection to the first electrical load according to the invention, no (high-performance) switching device or contactor is required for this power transmission path.

[0013] The other electrical consumers are electrically connected to the terminals via electrical switches or contactors with low electrical power.

[0014] Due to the topology according to the invention, the maximum possible electrical power of the second or third connection can still be transmitted to the electrical loads. For example, if an AC power network with the maximum possible power is connected to the first connection, all electrical loads can be supplied exclusively via this connection.

[0015] Furthermore, a solution with multiple connections is provided, in which the device is informed of the maximum possible power output of each connection or the connected AC power grid. Adapter cables can be used to reduce the input power based on the grid conditions. The device connects the electrical loads to the connections in such a way that each connection is optimally or maximally loaded.

[0016] The switching devices allow the connections to be switched to the various electrical consumers in such a way that the device can draw the maximum available power from the AC mains for every possible input power configuration.

[0017] In summary, the invention provides for at least two connections to an AC power supply and at least two electrical loads, wherein at least one electrical load can be electrically connected to either the first or the second connection via a switching device or a contactor. The invention is described in detail below with reference to the drawings.

[0018] This shows:

[0019] Fig. 1 schematically shows a circuit diagram of a device for discharging thick material according to a first embodiment,

[0020] Fig. 2 schematically shows a circuit diagram of a device for discharging thick material according to a second embodiment,

[0021] Fig. 3 schematically shows a circuit diagram of a device for discharging thick material according to a third embodiment and

[0022] Fig. 4 schematically shows a circuit diagram of a device for discharging thick material according to a fourth embodiment.

[0023] Fig. 1 shows a highly schematic circuit diagram of a device 100 for discharging viscous material in the form of a truck-mounted concrete pump according to a first embodiment. It is understood that only the essential components of the invention are shown and that the device may include further components necessary for its function.

[0024] All power ratings below are given in current equivalents, i.e., amperes (A).

[0025] The device 100 has a first electrical consumer 1, for example in the form of an electric motor with an upstream inverter with a maximum current consumption of, for example, 63 A, 125 A or 300 A.

[0026] The device 100 further includes a second electrical consumer 2, for example also in the form of an electric motor with an upstream inverter with a maximum current consumption of, for example, 63 A or 125 A.

[0027] The device 100 further comprises a first terminal 3, which is connected to a first AC power supply 200 with a first maximum current of, for example, 125 A or 400 A. The device 100 further comprises a second terminal 4, which is connected to a second AC power supply 300 with a second maximum current of 63 A or 125 A.

[0028] The device 100 further comprises a first controllable switching device 5 in the form of an all-pole switching contactor, which, depending on its switching position, electrically connects the second electrical consumer 2 either to the first terminal 3 or the second terminal 4.

[0029] The device 100 further comprises a control unit 6 for controlling the first controllable switching device 5.

[0030] The device 100 can further include an all-pole disconnecting main switch 13.

[0031] Electrical loads 1 and 2 can only be supplied via the first terminal 3. In this case, the switching position of the first switching device 5 is such that the second electrical load 2 is electrically connected to the first terminal 3. Alternatively, the second electrical load 2 is electrically connected to the second terminal 4.

[0032] Fig. 2 shows a highly schematic circuit diagram of a device 100 for discharging thick material according to a second embodiment.

[0033] The device 100 according to the second embodiment further comprises a third electrical consumer 7 and a second controllable switching device 8, which, depending on its switching position, electrically connects the third electrical consumer 7 either to the first terminal 3 or to the second terminal 4.

[0034] The first terminal 3 is connected to the first AC network 200 with a first maximum output of 400 A. The second terminal 4 is connected to the second AC network 300 with a second maximum output of 125 A.

[0035] The first electrical load has a maximum current draw of 300 A, and the second and third electrical loads 2 and 7, respectively, have maximum current draws of 63 A and 125 A. The switching position of the switching devices 5 and 8 can be set such that the first electrical load 1 and the second electrical load 2 are electrically connected to the first terminal 3, and the third electrical load 7 is electrically connected to the second terminal 4. Fig. 3 shows a highly schematic circuit diagram of a device 100 for discharging thick material according to a third embodiment.

[0036] The device 100 further comprises: a third terminal 9, which is connected to a third AC voltage network 400 with a third maximum power, a third electrical consumer 10, and a second controllable switching device 8, which, depending on its switching position, electrically connects the third electrical consumer 10 either to the first terminal 3, the second terminal 4 or the third terminal 9.

[0037] The available power at terminals 3, 4 and 9 is 400 A, 125 A and 63 A respectively. Electrical loads 1, 2 and 10 have a maximum power of 300 A, 63 A and 63 A respectively.

[0038] Fig. 4 shows a highly schematic circuit diagram of a device 100 for discharging thick material according to a fourth embodiment.

[0039] The device 100 further comprises: a third terminal 9, which can be connected to a third AC voltage network 400 with a third maximum power, a third electrical load 10, a fourth electrical load 11, a second controllable switching device 8, which, depending on its switching position, electrically connects the third electrical load 10 either to the first terminal 2 or the second terminal 4, and a third controllable switching device 12, which, depending on its switching position, electrically connects the fourth electrical load 11 either to the first terminal 3 or the third terminal 9.

[0040] The available power at terminals 3, 4 and 9 is 400 A, 125 A and 63 A respectively. Electrical loads 1, 2, 10 and 11 have a maximum power of 300 A, 63 A, 63 A and 63 A respectively.

[0041] Optionally, fuses can be provided for the connections. A protective device can also be included to check whether all plugs or wires are connected.

Claims

Patent claims 1. Device (100) for discharging thick material, comprising: a first electrical consumer (1), a second electrical consumer (2), a first connection (3) which can be connected to a first AC power supply (200) with a first maximum power, a second connection (4) which can be connected to a second AC power supply (300) with a second maximum power, a first controllable switching device (5) which, depending on its switching position, electrically connects the second electrical consumer (2) either to the first connection (3) or to the second connection (4), and a control unit (6) for controlling the first controllable switching device (5).

2. Device (100) for discharging thick material according to claim 1, characterized in that the control unit (6) controls the first controllable switching means (5) depending on the first maximum power and the second maximum power.

3. Device (100) for discharging thick material according to one of the preceding claims, characterized in that the control unit (6) controls the first controllable switching means (5) depending on whether the first connection (3) is electrically connected to the first AC voltage network (200) or not and / or whether the second connection (4) is electrically connected to the second AC voltage network (300) or not.

4. Device (100) for discharging thick material according to one of the preceding claims, characterized in that the first maximum power is greater than the second maximum power.

5. Device (100) for discharging thick material according to one of the preceding claims, characterized in that the device (100) for discharging thick material further comprises: a third electrical consumer (7), and a second controllable switching means (8) which, depending on its switching position, electrically connects the third electrical consumer (7) either to the first connection (3) or to the second connection (4).

6. Device (100) for discharging thick material according to one of claims 1 to 4, characterized in that the device (100) for discharging thick material further comprises: a third connection (9) which can be connected to a third AC voltage network (400) with a third maximum power, a third electrical consumer (10), and a second controllable switching means (8) which, depending on its switching position, electrically connects the third electrical consumer (10) either to the first connection (3) or the third connection (9); or electrically connects the third electrical consumer (10) either to the first connection (3), the second connection (4) or the third connection (9).

7. Device (100) for discharging thick material according to one of claims 1 to 4, characterized in that the device (100) for discharging thick material further comprises: a third connection (9) which can be connected to a third AC voltage network (400) with a third maximum power, a third electrical consumer (10), a fourth electrical consumer (11), a second controllable switching device (8) which, depending on its switching position, electrically connects the third electrical consumer (10) either to the first connection (3) or the second connection (4), and a third controllable switching device (12) which, depending on its switching position, electrically connects the fourth electrical consumer (11) either to the first connection (3) or the third connection (9).

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