Voltage self-adaptive control circuit, power supply connecting circuit and hydraulic tunneling drill carriage

Abstract

The utility model relates to the technical field of power supplies, and discloses a voltage self-adaptive control circuit, a power supply connecting circuit and a hydraulic tunneling drill carriage, comprising a switch module used for switching the wiring mode of a main power supply line of power equipment between star connection and triangular connection; the input end of the voltage monitor is connected with an equipment power supply; the input end of the PLC is connected with the output end of the voltage monitor, and the output end of the PLC is connected with the switch module. The voltage monitor is used for monitoring the voltage of the power supply and outputting different signals to the switch module based on the voltage of the power supply; and the switch module is connected with the control end of the main power supply line, and the switch module is used for controlling the main power supply line to switch the connection modes according to the signal output by the voltage monitor, so that the power supply of different voltages can be adapted only by switching the connection modes of the main power supply line.

Description

Technical Field

[0001] The utility model relates to the technical field of power supplies, in particular to a voltage adaptive control circuit, a power connection circuit and a hydraulic tunneling jumbo. Background Art

[0002] Traditional hydraulic tunneling jumbos are usually equipped with dual power sources to provide power for the whole machine, that is, an engine is used as the power output when the chassis is driving for operation, and commercial power is used as the power output during tunneling operation. At present, when a hydraulic tunneling jumbo uses commercial power for operation, the adapted voltage level is usually AC380V. However, in some working areas with relatively harsh environments and long power transmission distances, only AC660V voltage can be provided. This requires customers to purchase another hydraulic tunneling jumbo with a different working voltage level again, otherwise the drilling rig with an AC380V working voltage cannot operate.

[0003] In the above situation, the hydraulic tunneling jumbo requires customers to purchase drilling rigs with different voltage levels respectively, which not only increases the vehicle usage cost of customers, but also requires customers to manually dispatch the operation vehicles with corresponding voltage levels according to different occasions, increasing the workload of vehicle usage for users. Even it is easy to have dispatching errors, which may lead to equipment damage at least and casualties at worst. Summary of the Utility Model

[0004] In view of this, the utility model provides a voltage adaptive control circuit, a power connection circuit and a hydraulic tunneling jumbo to solve the problem of how to achieve the self - adaptation of a hydraulic tunneling jumbo to two different voltage power supplies.

[0005] In a first aspect, the utility model provides a voltage adaptive control circuit, including: a voltage monitor, a voltage monitor, a PLC and a switch module. Among them, the switch module is used to switch the wiring mode of the main power supply line of the power equipment between star connection / delta connection; the input end of the voltage monitor is connected to the equipment power supply; the input end of the PLC is connected to the output end of the voltage monitor, and the output end of the PLC is connected to the switch module.

[0006] The voltage monitor of the utility model can automatically identify and adapt to both AC380V and AC660V voltages. Under different voltages, the switch module controls the on - off state of the main power supply line, so that the main power supply line is in different connection modes, that is, when the voltage is AC660V, it operates in a star connection mode; when the voltage is AC380V, it operates in a traditional star - delta step - down starting connection mode.

[0007] In an alternative embodiment, the main power supply line includes: a first switch circuit, a second switch circuit, and a third switch circuit. Among them, for the first switch circuit, the three phases at its first end are respectively connected to the three phases of the power supply, and the three phases at its second end are respectively connected to the three phases of the first power supply end of the device; for the second switch circuit, the three phases at its first end are respectively connected to the three phases of the power supply, and the three phases at its second end are respectively connected to the three phases of the second power supply end of the device; for the third switch circuit, the three phases at its first end are respectively connected to the three phases of the second power supply end of the device, and the two adjacent phases at its second end are interconnected.

[0008] In an alternative embodiment, the first switch circuit includes: normally open contacts of a first contactor. The three phases at its first end are respectively connected to the three phases of the power supply, and the three phases at its second end are respectively connected to the three phases of the first power supply end of the device;

[0009] The second switch circuit includes: normally open contacts of a second contactor. The three phases at its first end are respectively connected to the three phases of the power supply, and the three phases at its second end are respectively connected to the three phases of the second power supply end of the device;

[0010] The third switch circuit includes: normally open contacts of a third contactor. The three phases at its first end are respectively connected to the three phases of the second power supply end of the device, and the two adjacent phases at its second end are interconnected.

[0011] In an alternative embodiment, the voltage monitor includes: a monitoring relay and normally open contacts of the monitoring relay. Among them, for the monitoring relay, its first end inputs the supply voltage, and its second end is connected to the power supply; for the normally open contacts of the monitoring relay, its first end inputs the supply voltage, and its second end is connected to the first end of the PLC.

[0012] In an alternative embodiment, the switch module includes: a first switch control circuit, a second switch control circuit, a third switch control circuit, and a start / stop button. Among them, the PLC, its first end is connected to the second end of the normally open contacts of the monitoring relay; for the first switch control circuit, its first end inputs the positive supply voltage, its second end is connected to the second end of the PLC, and its third end inputs the negative supply voltage; for the second switch control circuit, its first end is connected to the fourth end of the first switch control circuit, its second end is connected to the third end of the PLC, and its third end inputs the negative supply voltage; for the third switch control circuit, its first end is connected to the fourth end of the first switch control circuit; for the start / stop button, its first end inputs the supply voltage, and its second end is connected to the fifth end of the PLC.

[0013] In an alternative embodiment, the first switch control circuit includes: the coil of the first relay, the normally open contact of the first relay, and the coil of the first contactor. Among them, for the coil of the first relay, its first end is connected to the second end of the PLC, and its second end inputs a negative power supply voltage; for the normally open contact of the first relay, its first end inputs a positive power supply voltage, its second end is connected to the first end of the coil of the first contactor, and its second end is also connected to the first end of the second switch control circuit and the first end of the third switch control circuit; for the coil of the first contactor, its second end is connected to the first end of the coil of the first relay.

[0014] In an alternative embodiment, the second switch control circuit includes: the coil of the second relay, the normally open contact of the second relay, the normally closed contact of the third relay, and the coil of the second contactor. Among them, for the coil of the second relay, its first end is connected to the third end of the PLC, and its second end inputs a negative power supply voltage; for the normally open contact of the second relay, its first end is connected to the second end of the normally open contact of the first relay, and its second end is connected to the first end of the normally closed contact of the third relay; for the normally closed contact of the third relay, its second end is connected to the first end of the coil of the second contactor; for the coil of the second contactor, its second end is connected to the second end of the coil of the second relay.

[0015] In an alternative embodiment, the third switch control circuit includes: the coil of the third relay, the normally open contact of the third relay, the normally closed contact of the second relay, and the coil of the third contactor. Among them, for the coil of the third relay, its first end is connected to the fourth end of the PLC, and its second end inputs a negative power supply voltage; for the normally open contact of the third relay, its first end is connected to the second end of the normally open contact of the first relay, and its second end is connected to the first end of the normally closed contact of the second relay; for the normally closed contact of the second relay, its second end is connected to the first end of the coil of the third contactor; for the coil of the third contactor, its second end is connected to the second end of the coil of the third relay.

[0016] In a third aspect, the present invention provides a hydraulic tunneling jumbo, which is characterized by including: a second power connection circuit and a hydraulic tunneling jumbo body, wherein the motor of the power connection circuit supplies power to the hydraulic tunneling jumbo body. Description of the Drawings

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a composition diagram of a voltage adaptive control circuit according to an embodiment of the present invention;

[0019] Figure 2 It is a composition diagram of another voltage adaptive control circuit according to an embodiment of the present invention;

[0020] Figure 3 It is a specific circuit structure diagram of the voltage adaptive control circuit according to an embodiment of the present invention;

[0021] Figure 4 It is a control flow chart according to an embodiment of the present invention;

[0022] Figure 5 It is a composition diagram of the power supply according to an embodiment of the present invention. Specific implementation manners

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] In this embodiment, a voltage adaptive control circuit is provided. As Figure 1 shown, it includes: a voltage monitor, a PLC, and a switch module.

[0025] As Figure 1 shown, the switch module is used to switch the wiring mode of the main power supply line of the power equipment between star connection / delta connection; the input end of the voltage monitor is connected to the equipment power supply; the input end of the PLC is connected to the output end of the voltage monitor, and the output end of the PLC is connected to the switch module.

[0026] As Figure 1 shown, the main power supply line is connected to a power supply; the voltage monitor is connected to both the power supply and the switch module, and the voltage monitor is used to monitor the voltage of the power supply and output different signals to the switch module based on the voltage of the power supply; the switch module is connected to the control end of the main power supply line, and the switch module is used to control the switch module to perform the switching of the connection mode according to the signal output by the voltage monitor.

[0027] Specifically, as Figure 1As shown, the main power supply line has its three phases at the first end respectively corresponding to and connected to the three phases of the power supply, its three phases at the second end respectively corresponding to and connected to the three phases of the first power supply end of the device, its three phases at the second end respectively corresponding to and connected to the three phases of the second power supply end of the device, and two adjacent phases at its third end are interconnected.

[0028] Specifically, the main power supply line incorporates multiple switch sub - circuits, and each switch sub - circuit can enable the device to operate in a star connection mode or a delta connection mode under different on - off states.

[0029] Specifically, as Figure 1 shown, the voltage monitor has its first end inputting the supply voltage, its second end connected to the power supply, its third end connected to the first end of the switch module, and it is used to monitor the voltage of the power supply and output different signals to the switch module based on the voltage of the power supply.

[0030] Specifically, as Figure 1 shown, the switch module has its second end inputting the supply voltage, its third end connected to the control end of the main power supply line, and it is used to control the main power supply line to switch to the star connection or delta connection mode based on the signal.

[0031] It should be noted that the control methods built into the switch module are only for controlling the switches, and they are all existing control methods, so they will not be elaborated here.

[0032] In some alternative embodiments, as Figure 1 shown, the main power supply line includes: a first switch circuit, a second switch circuit, and a third switch circuit.

[0033] As Figure 1 shown, for the first switch circuit, its three phases at the first end are respectively corresponding to and connected to the three phases of the power supply, and its three phases at the second end are respectively corresponding to and connected to the three phases of the first power supply end of the device. Specifically, the first switch circuit is connected in series between the power supply and the device. When the first switch circuit is on, the power supply outputs alternating current to the device; when the first switch circuit is off, the power supply is disconnected from the device and the device is powered off.

[0034] As Figure 1 shown, for the second switch circuit, its three phases at the first end are respectively corresponding to and connected to the three phases of the power supply, and its three phases at the second end are respectively corresponding to and connected to the three phases of the second power supply end of the device. For the third switch circuit, its three phases at the first end are respectively corresponding to and connected to the three phases of the second power supply end of the device, and two adjacent phases at its second end are interconnected.

[0035] Specifically, the second switch circuit connects the second power supply terminal of the device to the power supply. When the first switch circuit and the second switch circuit are conducting while the third switch circuit is open, the wiring mode of the device is triangular. When the first switch circuit and the third switch circuit are conducting while the second switch circuit is open, the wiring mode of the device is star-shaped.

[0036] In some alternative embodiments, such as Figure 1 shown, the voltage monitor includes: a monitoring relay and a normally open contact of the monitoring relay.

[0037] As Figure 1 shown, for the monitoring relay, its first terminal receives the supply voltage, and its second terminal is connected to the power supply. For the normally open contact of the monitoring relay, its first terminal receives the supply voltage, and its second terminal is connected to the first terminal of the PLC.

[0038] Specifically, the monitoring relay can monitor the magnitude of the output voltage of the power supply, and based on the magnitude of the output voltage, make the normally open contact of the monitoring relay be in different states. For example: when the output voltage of the power supply is 660V, the normally open contact of the monitoring relay is open; when the output voltage of the power supply is 380V, the normally open contact of the monitoring relay is closed. The PLC can determine the connection mode of the device by monitoring the on / off state of the normally open contact of the monitoring relay.

[0039] In some alternative embodiments, such as Figure 1 、 Figure 2 shown, the switch module includes: a first switch control circuit, a second switch control circuit, a third switch control circuit, and a start / stop button.

[0040] As Figure 1 shown, for the first switch control circuit, its first terminal receives the positive supply voltage, its second terminal is connected to the second terminal of the PLC, and its third terminal receives the negative supply voltage.

[0041] Specifically, the first switch control circuit can control the on / off state of the first switch circuit. Whether the output voltage of the power supply is 380V or 660V, when starting, the PLC sends a control signal to the first switch control circuit. After the first switch control circuit conducts, the first switch circuit conducts, and the power supply is connected to the device.

[0042] As Figure 1 shown, for the second switch control circuit, its first terminal is connected to the fourth terminal of the first switch control circuit, its second terminal is connected to the third terminal of the PLC, and its third terminal receives the negative supply voltage. For the third switch control circuit, its first terminal is connected to the fourth terminal of the first switch control circuit. The second switch control circuit and the third switch control circuit are interlocked. For the start / stop button, its first terminal receives the supply voltage, and its second terminal is connected to the fifth terminal of the PLC

[0043] Specifically, the on / off state of the second switch control circuit determines the on / off state of the second switch circuit, and the on / off state of the third switch control circuit determines the on / off state of the third switch circuit. For example: when the output voltage of the power supply is 380V, the PLC sends a control signal to the second switch control circuit and the third switch control circuit. After the second switch control circuit is turned on and the third switch control circuit is turned off, the second switch circuit is turned on and the third switch circuit is turned off. At this time, the wiring mode of the device is triangular; when the output voltage of the power supply is 660V, the PLC sends a control signal to the second switch control circuit and the third switch control circuit. After the second switch control circuit is turned off and the third switch control circuit is turned on, the second switch circuit is turned off and the third switch circuit is turned on. At this time, the wiring mode of the device is star-shaped.

[0044] Based on the above analysis, the voltage adaptive control circuit of this embodiment can adapt to two voltages of different magnitudes. The following takes 380V and 660V voltages as examples for illustration:

[0045] (1) After startup, the PLC sends a control signal to the first switch control circuit. After the first switch control circuit is turned on, the first switch circuit is turned on, and the power supply is connected to the device.

[0046] (2) ① When the monitoring relay detects that the voltage of the power supply is 660V, the normally open contact of the monitoring relay is disconnected. The PLC sends a control signal to the second switch control circuit and the third switch control circuit. After the second switch control circuit is turned off and the third switch control circuit is turned on, the second switch circuit is turned off and the third switch circuit is turned on. At this time, the wiring mode of the device is star-shaped.

[0047] ② When the monitoring relay detects that the voltage of the power supply is 380V, the normally open contact of the monitoring relay is closed. The PLC sends a control signal to the second switch control circuit and the third switch control circuit. After the second switch control circuit is turned on and the third switch control circuit is turned off, the second switch circuit is turned on and the third switch circuit is turned off. At this time, the wiring mode of the device is triangular.

[0048] Optionally, for the above step ②, before switching to the star connection mode, it can operate at a reduced voltage.

[0049] The specific operation is as follows:

[0050] When the monitoring relay detects that the voltage of the power supply is 380V, the normally open contact of the monitoring relay closes. The PLC sends a control signal to the third switch control circuit, and the third switch control circuit conducts. Since the second switch control circuit and the third switch control circuit are interlocked, the second switch control circuit is disconnected at this time. The second switch circuit is disconnected and the third switch circuit conducts, and the wiring mode of the device is star-shaped. After a preset time, the PLC sends a control signal to the second switch control circuit and the third switch control circuit. After the second switch control circuit conducts and the third switch control circuit is turned off, the second switch circuit conducts and the third switch circuit is turned off. At this time, the wiring mode of the device is triangular.

[0051] Specifically, as Figure 2 shown, the voltage adaptive control circuit further includes: a start-stop button, the first end of which inputs the power supply voltage, and the second end of which is connected to the fifth end of the PLC.

[0052] Specifically, the operation of the start-stop button is as follows:

[0053] (1) When starting, when the start-stop button is pressed, the PLC sends a control signal to the first switch control circuit and the second switch control circuit. After the first switch control circuit and the second switch control circuit conduct, the first switch circuit and the second switch circuit conduct, and the wiring mode of the device is triangular; or, when starting, when the start-stop button is pressed, the PLC sends a control signal to the first switch control circuit and the third switch control circuit. After the first switch control circuit and the third switch control circuit conduct, the first switch circuit and the third switch circuit conduct, and the wiring mode of the device is star-shaped.

[0054] (2) After starting, when the start-stop button is pressed again, the PLC sends a control signal to the first switch control circuit and the second switch control circuit. After the first switch control circuit is turned off and the second switch control circuit is turned off, the first switch circuit is turned off and the second switch circuit is turned off; or, after starting, when the start-stop button is pressed again, the PLC sends a control signal to the first switch control circuit and the third switch control circuit. After the first switch control circuit is turned off and the third switch control circuit is turned off, the first switch circuit is turned off and the third switch circuit is turned off.

[0055] In some alternative embodiments, as Figure 3 shown, the first switch circuit includes: the normally open contacts of the first contactor (KM1), the three phases of the first end of which are respectively connected to the three phases of the power supply, and the three phases of the second end of which are respectively connected to the three phases of the first power supply terminal of the device.

[0056] Specifically, the first contactor includes a coil and normally open contacts. The coil is arranged in the first switch control circuit. When the first switch control circuit conducts, the coil is energized and the normally open contacts close.

[0057] In some alternative embodiments, such as Figure 3 shown, the second switch circuit includes: normally open contacts of a second contactor (KM2), the three phases of the first end thereof are respectively connected to the three phases of the power supply in correspondence, and the three phases of the second end thereof are respectively connected to the three phases of the second power supply end of the device in correspondence.

[0058] Specifically, the second contactor includes a coil and normally open contacts. The coil is disposed in the second switch control circuit. When the second switch control circuit is turned on, the coil is energized and the normally open contacts are closed.

[0059] In some alternative embodiments, such as Figure 3 shown, the third switch circuit includes: normally open contacts of a third contactor (KM3), the three phases of the first end thereof are respectively connected to the three phases of the second power supply end of the device in correspondence, and two adjacent phases of the second end thereof are interconnected.

[0060] Specifically, the third contactor includes a coil and normally open contacts. The coil is disposed in the third switch control circuit. When the third switch control circuit is turned on, the coil is energized and the normally open contacts are closed.

[0061] In some alternative embodiments, such as Figure 3 shown, the first switch control circuit includes: a coil of a first relay (KA1), normally open contacts of the first relay, and a coil of a first contactor.

[0062] Such as Figure 3 shown, for the coil of the first relay, the first end thereof is connected to the second end of the PLC, and the second end thereof inputs a negative power supply voltage; for the normally open contacts of the first relay, the first end thereof inputs a positive power supply voltage, the second end thereof is connected to the first end of the coil of the first contactor, and the second end thereof is also connected to the first end of the second switch control circuit (i.e., normally open contacts of a second relay (KA2)) and the first end of the third switch control circuit (i.e., normally open contacts of a third relay (KA3)); for the coil of the first contactor, the second end thereof is connected to the first end of the coil of the first relay.

[0063] Specifically, there are the following two situations for the on / off state of the first switch control circuit:

[0064] (1) When the coil of the first relay is energized, the normally open contacts of the first relay are closed, the coil of the first contactor is energized, the first contactor is closed, and the power supply is connected to the device.

[0065] (2) When the coil of the first relay is de-energized, the normally open contacts of the first relay are opened, the coil of the first contactor is de-energized, the first contactor is opened, and the power supply is disconnected from the device.

[0066] In some alternative embodiments, such asFigure 3 As shown, the second switch control circuit includes: the coil of the second relay (KA2), the normally open contact of the second relay, the normally closed contact of the third relay (KA3), and the coil of the second contactor (KM2).

[0067] As Figure 3 shown, for the coil of the second relay, its first end is connected to the third end of the PLC, and its second end receives the negative power supply voltage; for the normally open contact of the second relay, its first end is connected to the second end of the normally open contact of the first relay, and its second end is connected to the first end of the normally closed contact of the third relay; for the normally closed contact of the third relay, its second end is connected to the first end of the coil of the second contactor; for the coil of the second contactor, its second end is connected to the second end of the coil of the second relay.

[0068] Specifically, there are the following two situations for the on-off state of the second switch control circuit:

[0069] (1) When the coil of the second relay is energized and the coil of the third relay is de-energized, the normally open contact of the second relay closes and the normally closed contact of the third relay closes, then the coil of the second contactor is energized and the second contactor closes. At this time, the wiring mode of the device is delta.

[0070] (2) When the coil of the second relay is de-energized and the coil of the third relay is energized, the normally open contact of the second relay opens and the normally closed contact of the third relay opens, then the coil of the second contactor is de-energized and the second contactor opens, that is, at this time the second switch control circuit is disconnected. Since the second switch control circuit and the third switch control circuit are interlocked, the third switch control circuit is turned on. At this time, the wiring mode of the device is delta.

[0071] In some alternative embodiments, as Figure 3 shown, the third switch control circuit includes: the coil of the third relay (KA3), the normally open contact of the third relay, the normally closed contact of the second relay (KA2), and the coil of the third contactor (KM3).

[0072] As Figure 3 shown, for the coil of the third relay, its first end is connected to the fourth end of the PLC, and its second end receives the negative power supply voltage; for the normally open contact of the third relay, its first end is connected to the second end of the normally open contact of the first relay, and its second end is connected to the first end of the normally closed contact of the second relay; for the normally closed contact of the second relay, its second end is connected to the first end of the coil of the third contactor; for the coil of the third contactor, its second end is connected to the second end of the coil of the third relay.

[0073] Specifically, there are the following two situations for the on-off state of the third switch control circuit:

[0074] (1) When the coil of the third relay is energized and the coil of the second relay is de-energized, the normally open contact of the third relay closes and the normally closed contact of the second relay closes. Then the coil of the third contactor is energized and the third contactor closes. At this time, the wiring mode of the device is star-shaped.

[0075] (2) When the coil of the third relay is de-energized and the coil of the second relay is energized, the normally open contact of the third relay opens and the normally closed contact of the second relay opens. Then the coil of the third contactor is de-energized and the third contactor opens, that is, the third switch control circuit is disconnected at this time. Since the second switch control circuit is interlocked with the third switch control circuit, the second switch control circuit is turned on. At this time, the wiring mode of the device is star-shaped.

[0076] Reference Figure 3 , the control principle of the voltage adaptive control circuit is as Figure 4 shown as follows:

[0077] (1) When the external AC660V voltage is connected, the monitoring relay monitors that the system voltage is 660V, and the normally open contact (KAP) of the monitoring relay opens. At this time, the motor adopts a star connection mode; specifically, when the S1 start button is pressed, the PLC output signal turns on the coils of KA1 and KA3. The normally open contacts of KA1 and KA3 close, and then the coils of KM1 and KM3 are turned on and the normally open contacts close. The motor runs in a star wiring mode. At this time, the voltage across the motor coils remains at the rated voltage of the coil, AC380V. When the S1 is pressed again, the coils of KA1 and KA3 are de-energized, and the coils of KM1 and KM3 are de-energized immediately, and the motor stops running. The control flow is as Figure 4 shown.

[0078] (2) When the external AC380V voltage is connected, the monitoring relay monitors that the system voltage is 380V, and the normally open contact (KAP) of the monitoring relay closes. At this time, the motor adopts a star-delta starting connection mode; specifically, when the S1 start button is pressed, the PLC output signal turns on the coils of KA1 and KA3. The normally open contacts of KA1 and KA3 close, and then the coils of KM1 and KM3 are turned on and the normally open contacts close. The motor runs in a star wiring mode. At this time, the voltage across the motor coils is AC220V (step-down operation). After 7S (the time can be set) of the timing time in the PLC, the coil of KA3 is de-energized and the coil of KA2 is energized. At this time, the coils of KM1 and KM2 are energized, and the motor runs in a delta wiring mode. At this time, the voltage across the motor coils remains at the rated voltage of the coil, AC380V. When the S1 is pressed again, the coils of KA1 and KA2 are de-energized, and the coils of KM1 and KM2 are de-energized immediately, and the motor stops running. The control flow is as Figure 4 shown.

[0079] In this embodiment, a power connection circuit is provided, as Figure 5As shown, it includes: the voltage adaptive control circuit, the motor, and the main power supply line of the motor in the above embodiments and any optional implementation manners.

[0080] As Figure 5 shown, for the main power supply line of the motor, the three phases at its first end are respectively connected to the three phases of the power supply, the three phases at its second end are respectively connected to the three phases of the first power supply end of the motor, the three phases at its second end are respectively connected to the three phases of the second power supply end of the motor, and the adjacent two phases at its third end are interconnected. As Figure 1 shown, the main power supply line of the motor includes a first switch circuit, a second switch circuit, and a third switch circuit.

[0081] As Figure 5 shown, for the voltage monitor, its input end is connected to the power supply, its output end is connected to the first end of the switch module, and it is used to monitor the voltage of the power supply and output different signals to the switch module based on the voltage of the power supply.

[0082] As Figure 5 shown, for the switch module, its second end inputs the supply voltage, its third end is connected to the main power supply line of the motor, and it is used to control the main power supply line to switch to the star connection or delta connection mode based on the signal.

[0083] The switching of the motor wiring method has been described in detail in the above embodiments and will not be elaborated here.

[0084] In this embodiment, a hydraulic tunneling jumbo is provided, which is characterized by including: the above-mentioned power connection circuit and the hydraulic tunneling jumbo body, wherein the motor of the power connection circuit supplies power to the hydraulic tunneling jumbo body.

[0085] Figure 5 In, the voltage monitor can automatically identify and adapt to two voltages of AC380V and AC660V. Under different voltages, the switch module controls the on-off state of the main power supply line, so that the main power supply line is in different connection modes, that is, when the voltage is AC660V, it operates in the star connection mode; when the voltage is AC380V, it operates in the traditional star and delta step-down starting connection modes. Thus, only the power connection circuit can be used to realize the switching of the power supply of the hydraulic tunneling jumbo body between AC660V and AC380V.

[0086] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A voltage adaptive control circuit, characterized in that: include: Voltage monitor, PLC and switch module, among which, The switch module is used to switch the connection mode of the main power supply line of the power equipment between star connection and delta connection; The input terminal of the voltage monitor is connected to the power supply of the device; The input end of the PLC is connected to the output end of the voltage monitor, and the output end of the PLC is connected to the switch module.

2. The voltage adaptive control circuit according to claim 1, characterized in that: The main power supply circuit includes: a first switch circuit, a second switch circuit and a third switch circuit, wherein: A first switch circuit, wherein the three phases of the first end are respectively connected to the three phases of the power supply, and the three phases of the second end are respectively connected to the three phases of the first power supply end of the device; A second switch circuit, wherein the three phases of the first end are respectively connected to the three phases of the power supply, and the three phases of the second end are respectively connected to the three phases of the second power supply end of the device; The third switch circuit has three phases at its first end connected to the three phases at the second power supply end of the device respectively, and two adjacent phases at its second end connected to each other.

3. The voltage adaptive control circuit according to claim 2, characterized in that: The first switch circuit comprises: a normally open contact of a first contactor, the three phases of the first end of which are respectively connected to the three phases of the power supply, and the three phases of the second end of which are respectively connected to the three phases of the first power supply end of the device; The second switch circuit comprises: a normally open contact of a second contactor, the three phases of a first end of which are respectively connected to the three phases of a power supply, and the three phases of a second end of which are respectively connected to the three phases of a second power supply end of the device; The third switch circuit includes: a normally open contact of a third contactor, three phases of the first end of which are respectively connected to the three phases of the second power supply end of the device, and two adjacent phases of the second end of which are connected to each other.

4. The voltage adaptive control circuit according to claim 1, characterized in that: The voltage monitor includes: a monitoring relay and a normally open contact of the monitoring relay, wherein: A monitoring relay, a first end of which is input with a supply voltage, and a second end of which is connected with the power supply; The normally open contact of the monitoring relay has a first end inputting a supply voltage and a second end connected to the first end of the PLC.

5. The voltage adaptive control circuit according to claim 4, characterized in that: The switch module comprises: a first switch control circuit, a second switch control circuit, a third switch control circuit and a start / stop button, wherein the PLC, a first end of which is connected to the second end of the normally open contact of the monitoring relay; A first switch control circuit, a first terminal of which is input with a positive supply voltage, a second terminal of which is connected to a second terminal of the PLC, and a third terminal of which is input with a negative supply voltage; A second switch control circuit, a first end of which is connected to the fourth end of the first switch control circuit, a second end of which is connected to the third end of the PLC, and a negative supply voltage is input to the third end of the second switch control circuit; a third switch control circuit, a first end of which is connected to a fourth end of the first switch control circuit; The start-stop button has a first end for inputting a power supply voltage and a second end for connecting to a fifth end of the PLC.

6. The voltage adaptive control circuit according to claim 5, characterized in that: The first switch control circuit includes: a coil of a first relay, a normally open contact of the first relay, and a coil of a first contactor, wherein: A coil of a first relay, a first end of which is connected to a second end of the PLC, and a negative supply voltage is input to a second end of the coil; A normally open contact of the first relay, a first end of which is connected to the input positive supply voltage, a second end of which is connected to the first end of the coil of the first contactor, and a second end of which is also connected to the first end of the second switch control circuit and the first end of the third switch control circuit; The second end of the coil of the first contactor is connected to the first end of the coil of the first relay.

7. The voltage adaptive control circuit according to claim 6, characterized in that: The second switch control circuit includes: a coil of a second relay, a normally open contact of the second relay, a normally closed contact of a third relay, and a coil of a second contactor, wherein: A coil of a second relay, a first end of which is connected to the third end of the PLC, and a second end of which is input with a negative supply voltage; A normally open contact of the second relay, a first end of which is connected to the second end of the normally open contact of the first relay, and a second end of which is connected to the first end of the normally closed contact of the third relay; a normally closed contact of a third relay, a second end of which is connected to a first end of the coil of the second contactor; A second end of the coil of the second contactor is connected to the second end of the coil of the second relay.

8. The voltage adaptive control circuit according to claim 7, characterized in that: The third switch control circuit includes: a coil of a third relay, a normally open contact of the third relay, a normally closed contact of the second relay, and a coil of a third contactor, wherein: A coil of a third relay, a first end of which is connected to the fourth end of the PLC, and a second end of which is input with a negative supply voltage; A normally open contact of a third relay, a first end of which is connected to the second end of the normally open contact of the first relay, and a second end of which is connected to the first end of the normally closed contact of the second relay; A normally closed contact of the second relay, a second end of which is connected to a first end of the coil of the third contactor; A second end of the coil of the third contactor is connected to the second end of the coil of the third relay.

9. A power connection circuit, characterized in that: include: The voltage adaptive control circuit, motor and motor main power supply circuit according to any one of claims 1 to 8, wherein: The main power supply circuit of the motor, the three phases of the first end are respectively connected to the three phases of the power supply, the three phases of the second end are respectively connected to the three phases of the first power supply end of the motor, the three phases of the second end are respectively connected to the three phases of the second power supply end of the motor, and the adjacent two phases of the third end are connected to each other; a voltage monitor, whose input end is connected to the power supply, whose output end is connected to the first end of the switch module, and which is used to monitor the voltage of the power supply and output different signals to the switch control circuit based on the voltage of the power supply; The switch module has a second end for inputting a power supply voltage and a third end for connecting to the main power supply line of the motor, and is used for controlling the main power supply line of the motor to switch to a star connection or a delta connection based on the signal.

10. A hydraulic drilling rig, characterized in that: include: The power connection circuit and hydraulic tunneling drilling vehicle body as described in claim 9, wherein the motor of the power connection circuit supplies power to the hydraulic tunneling drilling vehicle body.

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