CN220475399U - Leakage lock protection device and working machine - Google Patents
Leakage lock protection device and working machine Download PDFInfo
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- CN220475399U CN220475399U CN202322101921.4U CN202322101921U CN220475399U CN 220475399 U CN220475399 U CN 220475399U CN 202322101921 U CN202322101921 U CN 202322101921U CN 220475399 U CN220475399 U CN 220475399U
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- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 13
- 238000005065 mining Methods 0.000 description 13
- 239000003245 coal Substances 0.000 description 12
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- 101000969031 Homo sapiens Nuclear protein 1 Proteins 0.000 description 3
- 102100021133 Nuclear protein 1 Human genes 0.000 description 3
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Abstract
The application provides a leakage blocking protection device and operation machinery, belongs to operation machinery technical field, and leakage blocking protection device includes: the motor is used for being connected with a power supply; the vacuum contactor is arranged between the motor and the power supply; the current transformer is arranged between the vacuum contactor and the motor and is used for collecting current signals; the electric leakage detection module is used for detecting electric leakage of the power loop; and the main controller is respectively connected with the electric leakage detection module and the current transformer and is used for controlling the connection or disconnection of the vacuum contactor according to the detection result of the electric leakage detection module and the acquisition result of the current transformer. Through the technical scheme of this application, the master controller is directly connected with electric leakage detection module and current transformer, realizes the relevant equipment reduction of electric leakage shutting function, and relative fault rate reduces.
Description
Technical Field
The application belongs to the technical field of working machines, and particularly relates to an electric leakage locking protection device and a working machine.
Background
The coal mining machine is an indispensable device in coal mine mining operation, and the real-time reliability of the operation plays a decisive role in the high efficiency and high quality of mining. According to the national safety requirements for coal mining operation, the stability and the fault quick processing of equipment are indispensable. When equipment has problems, the coal mining machine can deal with the problems at the first time, and the aims of protecting personal safety and equipment safety are achieved. At present, the coal mining machine detects leakage information and locking operation through an STM32 control board and then communicates with a main controller of the coal mining machine. The electric leakage locking function can be completed automatically by the main controller of the coal mining machine, a procedure is added, the processing speed is reduced, and meanwhile, the fault rate is improved.
Disclosure of Invention
Embodiments according to the present application aim to at least ameliorate one of the technical problems in the prior art or the related art.
In view of this, it is an object of embodiments according to the present application to provide a leakage lock protection device.
It is another object of an embodiment according to the present application to provide a work machine.
In order to achieve the above object, according to a first aspect of the present application, there is provided a leakage lock protection device, including: the motor is used for being connected with a power supply; the vacuum contactor is arranged between the motor and the power supply; the current transformer is arranged between the vacuum contactor and the motor and is used for collecting current signals; the electric leakage detection module is used for detecting electric leakage of the power loop; and the main controller is respectively connected with the electric leakage detection module and the current transformer and is used for controlling the connection or disconnection of the vacuum contactor according to the detection result of the electric leakage detection module and the acquisition result of the current transformer.
According to the leakage locking protection device provided by the application, the leakage locking protection device comprises a motor, a vacuum contactor, a current transformer, a leakage detection module and a main controller. The current transformer is arranged on a circuit between the motor and the power supply and is used for collecting current signals. The electric leakage detection module is connected with a power supply and is used for carrying out electric leakage detection on the power loop. The main controller is directly connected with the leakage detection module and the current transformer, and the vacuum contactor is controlled to be connected or disconnected according to the detection result of the leakage detection module and the acquisition result of the current transformer. It can be understood that when the motor receives a starting command to formally start, the electric leakage detection plays a main guarantee role, the current transformer plays a secondary guarantee role, the double guarantee can effectively ensure the safety of equipment, and the personal safety and the equipment safety are greatly improved. The main controller is directly connected with the leakage detection module, and the main controller detects signals and performs locking operation, so that the relative equipment with the leakage locking function can be reduced, the relative failure rate is reduced, and the main controller is connected with hardware, and is safe and reliable.
In addition, the technical scheme provided by the application can also have the following additional technical characteristics:
in some embodiments, optionally, the leakage blocking protection device further includes: the first control cable is used for connecting the main controller with the electric leakage detection module; and the second control cable is used for connecting the main controller and the current transformer.
In this technical scheme, the earth leakage blocking protection device still includes first control cable and second control cable. The main controller is connected with the electric leakage detection module through a first control cable. The main controller is connected with the current transformer through a second control cable. The main controller is connected with the leakage detection module and the current transformer through hardware, so that the system is safe and reliable.
In some aspects, optionally, the second control cable comprises a 4-core shielded cable.
In this technical solution, the second control cable may be a 4-core shielded cable. The 4-core shielded cable can prevent electromagnetic noise interference.
In some embodiments, the leakage detection module may further include a serial communication interface and an output interface, where the serial communication interface and the output interface may be selectively turned on or off.
In the technical scheme, the electric leakage detection module comprises a serial communication interface and an output interface, and the serial communication interface and the output interface can be normally connected or disconnected according to whether the power loop is insulated.
In some technical schemes, optionally, when the power loop is insulated normally and the current transformer does not collect the current signal, the serial communication interface and the output interface are connected and output a connection signal, and the main controller outputs a digital output signal to control the vacuum contactor to be connected according to the connection signal.
In the technical scheme, when the power loop is insulated normally and the current transformer does not collect a current signal, the serial communication interface and the output interface are connected and output a connection signal, and the main controller outputs a digital output signal according to the connection signal to control the vacuum contactor to be connected, so that the motor can be started normally and run on the motor.
In some technical schemes, optionally, when the power loop is abnormal in insulation and the current transformer does not collect the current signal, the serial communication interface and the output interface are disconnected and output a disconnection signal, the master controller detects the disconnection signal and does not output a digital output signal, and the vacuum contactor is connected and disconnected.
In the technical scheme, when the power loop is abnormal in insulation and the current transformer does not collect a current signal, the serial communication interface and the output interface are disconnected and output a disconnection signal, the main controller detects the disconnection signal, the power loop is considered to be leaked, the digital output signal is not output, the vacuum contactor is connected and disconnected until the insulation is normal, and the serial communication interface and the output interface are closed.
In some embodiments, optionally, the leakage blocking protection device further includes: the isolating switch is arranged between the vacuum contactor and the power supply.
In the technical scheme, the electric locking protection device further comprises an isolating switch, wherein the isolating switch is arranged between the vacuum contactor and the power supply, and the isolating switch is connected, so that the equipment can be in a power-on state.
In some embodiments, optionally, the leakage blocking protection device further includes: the control transformer is arranged between the power supply and the electric leakage detection module; the switching power supply is arranged between the control transformer and the electric leakage detection module.
In the technical scheme, the leakage blocking protection device further comprises a control transformer and a switching power supply, wherein the control transformer is connected with the switching power supply and is arranged between the power supply and the switching power supplyBetween the electric leakage detection modules 。 The control transformer is used for converting the voltage from 3300V to 220V, and the switching power supply is used for converting the voltage from 220V to 24V.
In some technical solutions, optionally, the current transformers include a first current transformer, a second current transformer, and a third current transformer, where the first current transformer, the second current transformer, and the third current transformer are respectively connected with the master controller.
In the technical scheme, the current transformer comprises a first current transformer, a second current transformer and a third current transformer, and the first current transformer, the second current transformer and the third current transformer are respectively connected with the main controller. The first current transformer, the second current transformer and the third current transformer are respectively arranged on a circuit between the three-phase motor and the power supply.
According to a second aspect of the present application, there is provided a work machine comprising: the leakage lock protection device according to any one of the first aspects of the present application.
The working machine provided by the technical scheme of the application comprises the electric leakage locking protection device according to any one of the technical schemes of the first aspect of the application, so that the working machine has all the beneficial effects of the electric leakage locking protection device according to any one of the technical schemes of the first aspect of the application, and the description is omitted herein. The work machine includes a shearer.
Additional aspects and advantages of embodiments according to the present application will become apparent in the description that follows or may be learned by practice of embodiments according to the present application.
Drawings
Fig. 1 is a schematic diagram of an operating principle of a leakage lock protection device according to an embodiment provided in the present application.
The correspondence between the reference numerals and the component names in fig. 1 is:
10: a leakage blocking protection device; 110: a motor; 120: a vacuum contactor; 130: a current transformer; 132: a first current transformer; 134: a second current transformer; 136: a third current transformer; 140: the electric leakage detection module; 142: a serial communication interface; 144: an output interface; 150: a master controller; 160: a first control cable; 170: a second control cable; 180: an isolating switch; 190: a control transformer; 200: and a switching power supply.
Detailed Description
In order that the above-recited objects, features and advantages of embodiments according to the present application may be more clearly understood, a further detailed description of embodiments according to the present application will be rendered by reference to the appended drawings and detailed description. It should be noted that, without conflict, features according to embodiments of the present application may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments according to the present application, however, embodiments according to the present application may be practiced otherwise than as described herein, and thus the scope of protection afforded by embodiments according to the present application is not limited by the specific embodiments disclosed below.
Some embodiments provided according to the present application are described below with reference to fig. 1.
As shown in fig. 1, an earth leakage lockout protection device 10 according to an embodiment of the present application includes a motor 110, a vacuum contactor 120, a current transformer 130, an earth leakage detection module 140, and a master controller 150. Specifically, the motor 110 is configured to be coupled to a power source. The vacuum contactor 120 is provided between the motor 110 and the power supply. The current transformer 130 is disposed between the vacuum contactor 120 and the motor 110, and is used for collecting current signals. The leakage detection module 140 is used for detecting leakage of the power circuit. The main controller 150 is connected to the leakage detection module 140 and the current transformer 130, and is used for controlling the vacuum contactor 120 to be turned on or turned off according to the detection result of the leakage detection module 140 and the acquisition result of the current transformer 130.
The leakage lock protection device 10 provided according to the present embodiment includes a motor 110, a vacuum contactor 120, a current transformer 130, a leakage detection module 140, and a main controller 150. The current transformer 130 is disposed on a circuit between the motor 110 and the power supply, and is used for collecting current signals. The leakage detection module 140 is connected to a power supply, and is used for performing leakage detection on the power loop. The main controller 150 is directly connected with the leakage detection module 140 and the current transformer 130, and controls the vacuum contactor 120 to be connected or disconnected according to the detection result of the leakage detection module 140 and the acquisition result of the current transformer 130. It can be understood that when the motor 110 receives the start command and starts formally, the electric leakage detection plays a main guarantee role, the current transformer 130 plays a secondary guarantee role, and the double guarantee can effectively ensure the safety of the equipment, so that the personal safety and the equipment safety are greatly improved. The main controller 150 is directly connected with the leakage detection module 140, and the main controller 150 detects signals and performs locking operation, so that the reduction of related equipment with the leakage locking function, the reduction of relative failure rate, the hardware connection, safety and reliability can be realized.
In some embodiments, optionally, the earth leakage lockout protection device 10 further includes a first control cable 160 and a second control cable 170. The main controller 150 is connected to the leakage detection module 140 through a first control cable 160. The master controller 150 is connected to the current transformer 130 through a second control cable 170. The main controller 150 is connected with the leakage detection module 140 and the current transformer 130 through hardware, so that the safety and reliability are realized.
In some embodiments, the second control cable 170 may optionally be a 4-core shielded cable. The 4-core shielded cable can prevent electromagnetic noise interference.
In some embodiments, the leakage detection module 140 optionally includes a serial communication interface 142 and an output interface 144, the serial communication interface 142 and the output interface 144 being normally on or off depending on whether the power loop insulation is normal.
In some embodiments, optionally, when the power circuit is insulated normally and the current transformer 130 does not collect the current signal, the serial communication interface 142 and the output interface 144 are connected and output a connection signal, and the main controller 150 outputs a digital output signal according to the connection signal to control the vacuum contactor 120 to be connected, so that the motor 110 can be started normally, and the motor 110 is powered on.
In some embodiments, optionally, when the power loop is not properly insulated, the current transformer 130 does not collect the current signal, the serial communication interface 142 and the output interface 144 are disconnected and the disconnection signal is output, the master controller 150 detects the disconnection signal, considers the power loop to leak, does not output the digital output signal, and the vacuum contactor 120 is turned on and off until the insulation is normal, and the serial communication interface 142 and the output interface 144 are closed.
In some embodiments, the leakage lockout protection device 10 optionally further includes a disconnecting switch 180, wherein the disconnecting switch 180 is disposed between the vacuum contactor 120 and the power source, and the disconnecting switch 180 is turned on to enable the device to be in an energized state.
In some embodiments, the leakage lockout protection device 10 further includes a control transformer 190 and a switching power supply 200, wherein the control transformer 190 is connected to the switching power supply 200 and is disposed between the power supply and the leakage detection module 140 。 The control transformer 190 is used to convert the voltage from 3300V to 220V, and the switching power supply 200 is used to convert the voltage from 220V to 24V.
In some embodiments, the current transformers 130 optionally include a first current transformer 132, a second current transformer 134, and a third current transformer 136, and the first current transformer 132, the second current transformer 134, and the third current transformer 136 are respectively connected to the master controller 150. The first current transformer 132, the second current transformer 134, and the third current transformer 136 are respectively disposed on a circuit between the three-phase motor 110 and a power source.
A working machine according to an embodiment of the present application includes the earth leakage lock protection device 10 of any of the embodiments described above.
The working machine according to the embodiment of the present application includes the leakage blocking protection device 10 according to any one of the embodiments, so that the working machine has all the advantages of the leakage blocking protection device 10 according to any one of the embodiments, which are not described herein. Wherein the work machine comprises a shearer.
As shown in fig. 1, according to the earth leakage blocking protection device 10 according to an embodiment of the present application, a main controller 150 of a coal mining machine is directly connected to an earth leakage blocking module, and the main controller 150 detects a signal and performs a blocking operation. The working face coal mining machine is provided with the main controller 150, is directly connected with the electric leakage detection module 140 and the current transformer 130 detection circuit through control cables, the motor 110 receives a starting command to formally start, the electric leakage detection plays a main guarantee role, the current transformer 130 plays a secondary guarantee role, and the double guarantee can effectively guarantee the safety of equipment. The personal safety and the equipment safety are greatly improved.
Specifically, D1QF1 is turned on, putting the device in the powered state. The coal mining machine receives the electric signal of the motor 110, starts to perform electric leakage detection, and simultaneously detects the current state in the circuit in real time;
the power loop is normally insulated, and when no current signal is collected in the current transformer 130, COM1 and OUT2 are normally closed. The main controller 150 detects that the signal is on, and can normally start the motor 110, output D0 of the coal mining machine, switch on the coil of the contactor, contact the main loop of the contactor, and power up the motor 110 for running.
The power loop is abnormally insulated, no current signal is collected in the current transformer 130, and the COM1 and the OUT2 are disconnected. The main controller 150 detects that the signal is disconnected, considers that the power loop leaks electricity, the coal mining machine does not output D0, and the contactor is not connected. Until the insulation is normal, the COM1 and OUT2 are closed.
In summary, the beneficial effects of the embodiment of the application are:
1. and the leakage locking module is integrated.
2. The related equipment for realizing the leakage locking function is reduced, and the relative failure rate is reduced.
3. And the hardware connection is safe and reliable.
In embodiments according to the present application, the terms "first," "second," "third," are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the embodiments according to the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the embodiments according to the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments according to the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments according to the present application.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example according to the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely a preferred embodiment according to the present application and is not intended to limit the embodiment according to the present application, and various modifications and variations may be made to the embodiment according to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, or the like made within the spirit and principles of the embodiments according to the present application should be included in the protection scope of the embodiments according to the present application.
Claims (10)
1. An earth leakage lockout protection device, comprising:
a motor (110) for connection to a power source;
a vacuum contactor (120) provided between the motor (110) and the power supply;
the current transformer (130) is arranged between the vacuum contactor (120) and the motor (110) and is used for collecting current signals;
the electric leakage detection module (140) is used for detecting electric leakage of the power loop;
and the main controller (150) is respectively connected with the electric leakage detection module (140) and the current transformer (130) and is used for controlling the connection or disconnection of the vacuum contactor (120) according to the detection result of the electric leakage detection module (140) and the acquisition result of the current transformer (130).
2. The earth leakage lockout protection device of claim 1, further comprising:
a first control cable (160) for connecting the master controller (150) and the leakage detection module (140);
and the second control cable (170) is used for connecting the main controller (150) and the current transformer (130).
3. The earth leakage protection device of claim 2, wherein,
the second control cable (170) comprises a 4-core shielded cable.
4. The earth leakage protection device of claim 1, wherein,
the leakage detection module (140) comprises a serial communication interface (142) and an output interface (144), wherein the serial communication interface (142) and the output interface (144) are selectively switched on or off.
5. The earth leakage protection device of claim 4, wherein,
when the power loop is insulated normally and the current transformer (130) does not collect a current signal, the serial communication interface (142) and the output interface (144) are connected and output a connection signal, and the main controller (150) outputs a digital output signal according to the connection signal to control the vacuum contactor (120) to be connected.
6. The earth leakage protection device of claim 5, wherein,
when the power loop is abnormal in insulation, the current transformer (130) does not collect a current signal, the serial communication interface (142) and the output interface (144) are disconnected and output a disconnection signal, the main controller (150) detects the disconnection signal and does not output a digital output signal, and the vacuum contactor (120) is connected and disconnected.
7. The earth leakage lock protection device according to any one of claims 1 to 6, further comprising:
and an isolating switch (180) arranged between the vacuum contactor (120) and the power supply.
8. The earth leakage lock protection device according to any one of claims 1 to 6, further comprising:
a control transformer (190) provided between the power supply and the leakage detection module (140);
and a switching power supply (200) provided between the control transformer (190) and the leakage detection module (140).
9. The earth leakage lock protection device according to any one of claims 1 to 6,
the current transformer (130) comprises a first current transformer (132), a second current transformer (134) and a third current transformer (136), wherein the first current transformer (132), the second current transformer (134) and the third current transformer (136) are respectively connected with the main controller (150).
10. A work machine, comprising:
the earth leakage lock protection device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322101921.4U CN220475399U (en) | 2023-08-07 | 2023-08-07 | Leakage lock protection device and working machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322101921.4U CN220475399U (en) | 2023-08-07 | 2023-08-07 | Leakage lock protection device and working machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220475399U true CN220475399U (en) | 2024-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322101921.4U Active CN220475399U (en) | 2023-08-07 | 2023-08-07 | Leakage lock protection device and working machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220475399U (en) |
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2023
- 2023-08-07 CN CN202322101921.4U patent/CN220475399U/en active Active
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