CN116247624A - Equipment safety control system - Google Patents

Equipment safety control system Download PDF

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Publication number
CN116247624A
CN116247624A CN202310294328.8A CN202310294328A CN116247624A CN 116247624 A CN116247624 A CN 116247624A CN 202310294328 A CN202310294328 A CN 202310294328A CN 116247624 A CN116247624 A CN 116247624A
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CN
China
Prior art keywords
control
power supply
unit
switch
supply unit
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Pending
Application number
CN202310294328.8A
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Chinese (zh)
Inventor
王庆亚
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Dongfang Jingyuan Electron Ltd
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Dongfang Jingyuan Electron Ltd
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Application filed by Dongfang Jingyuan Electron Ltd filed Critical Dongfang Jingyuan Electron Ltd
Priority to CN202310294328.8A priority Critical patent/CN116247624A/en
Publication of CN116247624A publication Critical patent/CN116247624A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
    • H02H7/205—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment for controlled semi-conductors which are not included in a specific circuit arrangement
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Safety Devices In Control Systems (AREA)

Abstract

The invention provides a device safety control system, wherein a power supply unit is used for supplying power to a switch unit, a control module and external load devices; the switch unit is connected between the power supply unit and the alternating current contactor, the alternating current contactor is connected with the safety relay, and the safety relay is connected with the switch unit; the control module comprises a control unit and a control button, the control unit is connected with the safety relay, and the control button is connected with the control unit; the control unit is arranged to be capable of controlling the safety relay to be disconnected in a state that the control button is triggered so as to disconnect the alternating current contactor to disconnect the electrical connection between the power supply unit and the external load equipment; the switch unit is arranged to control the opening of the alternating current contactor so as to disconnect the electrical connection between the power supply unit and the external load equipment; the switch unit is further configured to control the safety relay to be closed to close the ac contactor to make an electrical connection between the power supply unit and the external load device in a state where the control button is not activated.

Description

Equipment safety control system
Technical Field
The invention relates to the technical field of semiconductors, in particular to a safety control system of equipment.
Background
With the development of the semiconductor chip industry, the application of the semiconductor chip in various industries is becoming more and more popular, and in order to ensure the quality of the semiconductor chip, electron beam defect detection is generally performed.
In the related art, in the process of using the electron beam defect detection device to detect, if the electron beam defect detection device is unexpected, a professional is generally required to be informed to the scene and open a power distribution room to perform scene inspection, and then a low-voltage wire inlet switch is manually tripped to cut off a power supply system of the power distribution cabinet, so that the power-off process of the device is troublesome, the process often requires several hours or even more, and the efficiency is low. Thus, how to quickly power down when the electron beam defect detecting device fails is important.
Disclosure of Invention
Aiming at the situation that if the electron beam defect detection equipment in the prior art is unexpected, a professional is required to check the scene, the power supply system of the power distribution cabinet is manually cut off, the equipment outage process is troublesome, and the efficiency is low.
According to a first aspect of the present invention, there is provided an apparatus safety control system comprising a power supply unit, a switching unit, an ac contactor, a safety relay, and a control module; the power supply unit is used for supplying power to the switch unit, the control module and external load equipment; the switch unit is connected between the power supply unit and the alternating current contactor, the alternating current contactor is connected with the safety relay, and the safety relay is connected with the switch unit; the control module comprises a control unit and a control button, wherein the control unit is connected with the safety relay, and the control button is connected with the control unit; wherein the control unit is configured to be able to control the safety relay to be disconnected in a state in which the control button is triggered, so as to disconnect the ac contactor, to disconnect the electrical connection between the power supply unit and an external load device; the switch unit is arranged to control the safety relay to be closed so as to close the alternating current contactor to connect the power supply unit and the external load equipment in a state that the control button is not triggered; in a state where the control button is triggered, the ac contactor can be controlled to be opened to disconnect the electrical connection between the power supply unit and the external load device.
Optionally, the switch unit includes a normally closed contact and a normally open contact, the normally closed contact is connected to the power supply unit and the safety relay, and the normally open contact is connected to the ac contactor and the safety relay; in a state that the control button is not triggered, controlling a normally open contact of the switch unit to be closed, and closing the safety relay to enable the alternating current contactor to be closed so as to connect the power supply unit and external load equipment electrically; and in a state that the control button is triggered, the normally closed contact of the switch unit is controlled to be opened, and the alternating current contactor is opened to disconnect the electric connection between the power supply unit and external load equipment.
Optionally, the ac contactor includes a first control coil and at least one first contact switch, the first contact switch is connected between the power supply unit and the load device, and the first control coil is connected to the safety relay and the power supply unit; the first control coil is configured to lose electricity when the safety relay is opened or when a normally closed contact of the switching unit is opened, so that the first contact switch is opened to disconnect the electrical connection between the power supply unit and external load equipment; the first control coil is further arranged to be energized when a normally open contact of the switching unit is closed to close the first contact switch to close an electrical connection between the power supply unit and an external load device.
Optionally, the safety relay includes a power supply terminal, a plurality of first input terminals, and a plurality of first output terminals; the power supply terminal is connected to the power supply unit; wherein two first input terminals are connected to the control unit, wherein two first output terminals are connected to the ac contactor and the switching unit, respectively.
Optionally, the control unit is a junction box, the junction box is provided with a control switch, and the control button is used for controlling the control switch to be turned off or turned on; the control switch is connected with the safety relay; the safety relay is closed when the control switch is closed and the normally open contact of the switch unit is closed; when the control switch is turned off, the safety relay is turned off.
Optionally, the control switch is provided with a plurality of normally closed contacts, and the control button is used for controlling the plurality of normally closed contacts; when any normally closed contact is disconnected, the safety relay is disconnected.
Optionally, the control unit is a PLC controller, and the PLC controller is in signal connection with the control button; and in a state that the control button is triggered, the PLC is configured to control the safety relay to be disconnected when a trigger signal of the control button is received.
Optionally, the equipment safety control system further comprises a first breaker and a second breaker; the first circuit breaker is arranged between the power supply unit and the first contact switch and is used for switching on or switching off the electric connection between the power supply unit and external load equipment; the second circuit breaker is arranged between the first circuit breaker and the control module and is used for switching on or switching off the power supply unit and the control module.
Optionally, the equipment safety control system further includes a switching power supply, an input end of the switching power supply is connected to the second circuit breaker, a first output end of the switching power supply is respectively connected to the safety relay and the switching unit, and a second output end of the switching power supply is respectively connected to the control module, the safety relay and the ac contactor.
Optionally, the device safety control system further comprises a heavy-duty connector, wherein the heavy-duty connector is connected to the power supply unit; the power supply unit is configured to supply power to the control module and the external load device through the heavy-duty connector.
In summary, the present invention provides an apparatus safety control system, which includes: the power supply unit, the switch unit, the alternating current contactor, the safety relay and the control module can cut off a circuit through the control unit or the switch unit under the condition that the control button is triggered, so that the power supply unit and external load equipment are disconnected, the mode is convenient, the equipment can be controlled rapidly, the efficiency and the safety are improved, and the safety risk is reduced as much as possible.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of an apparatus safety control system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an installation position of a control button according to an embodiment of the present invention;
FIG. 3 is a block diagram of an apparatus security control system according to an embodiment of the present invention;
FIG. 4 is a block diagram of an apparatus security control system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a control button according to an embodiment of the present invention;
FIG. 6 is a block diagram of an apparatus security control system provided by an embodiment of the present invention;
FIG. 7 is a block diagram of an apparatus security control system according to an embodiment of the present invention;
FIG. 8 is a block diagram of an apparatus security control system provided by an embodiment of the present invention;
fig. 9 is a block diagram of an apparatus safety control system according to an embodiment of the present invention.
Detailed Description
To further clarify the above and other features and advantages of the present invention, a further description of the invention will be rendered by reference to the appended drawings. It should be understood that the specific embodiments presented herein are for purposes of explanation to those skilled in the art and are intended to be illustrative only and not limiting.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the specific details need not be employed to practice the present invention. In other instances, well-known steps or operations have not been described in detail in order to avoid obscuring the invention.
Referring to fig. 1, the present invention provides a device safety control system, comprising: the device comprises a power supply unit, a switch unit, an alternating current contactor, a safety relay and a control module.
The power supply unit is used for supplying power to the switch unit, the control module and the external load equipment, the switch unit is connected between the power supply unit and the alternating current contactor, the alternating current contactor is connected to the safety relay, the safety relay is connected to the switch unit, the control module comprises a control unit and a control button, the control unit is connected to the safety relay, and the control button is connected to the control unit.
The external load device may be various, for example, any type or specification of electron beam defect detection device, or any power distribution device needing power supply at the load end, and the invention is not limited thereto.
In addition, the power supply unit may be any type of power supply terminal, for example, may be a power distribution cabinet for providing three-phase alternating current, or may also be other types of power supply terminals, so in the embodiment of the present invention, the power supply unit may be used to supply power to external load devices such as a switch unit, a control module, and an electron beam defect detection device.
In addition, the switch unit may be any type or specification of switch, such as a key switch, a knob switch, a single pole multi-throw, a multi-pole multi-throw switch, etc., which is not limited in the present invention.
In addition, the control button may be any button that can be used for operation, for example, an emergency off (EMO) button, or any type of control button that can be conveniently operated by a user, etc., which is not limited in the present invention.
The number of control buttons may be one or more, and the number and positions of the control buttons may be adaptively adjusted according to the size of the external load device or the like.
For example, in the embodiment of the present invention, the number of control buttons may be 6, and the setting positions of the control buttons may be various, for example, the setting positions and the number thereof may be as shown in fig. 2. As can be seen from fig. 2, the control button may be disposed at a user side, such as EMO1 disposed at a user side of a service area, or may be disposed at a manipulator feeding side of an electron beam defect detecting apparatus, such as EMO2 and EMO3, or may be disposed near a main system, such as EMO4 and EMO5 disposed at the electron beam detecting apparatus, or may be disposed near an electrical control cabinet, such as EMO6, etc., which is not limited in this invention.
Thus, in the embodiment of the invention, the control unit can be set to control the safety relay to be disconnected under the state that the control button is triggered so as to disconnect the alternating current contactor to disconnect the electric connection between the power supply unit and the external load equipment; the switch unit is arranged to control the safety relay to be closed so as to close the alternating current contactor to connect the power supply unit and the external load equipment in an electric connection state when the control button is not triggered; in a state where the control button is triggered, the ac contactor can be controlled to be opened to disconnect the electrical connection between the power supply unit and the external load device.
And if the control button is not triggered, indicating that the normal working state is present. At the moment, the safety relay can be closed to drive the alternating current contactor to be closed by controlling the switch unit to be conducted with the circuit under the condition that the power supply unit supplies power, so that the electric connection between the power supply unit and the cup of the external load can be conducted.
If the control button is activated, it may indicate that an emergency situation may occur, such as a malfunction of any device, at which time an emergency brake is required to open the circuit. Then, the control button is triggered, the circuit at the control unit is disconnected, so that the safety relay can be disconnected, for example, the safety relay can be disconnected because the circuit is disconnected and the internal relay of the safety relay is disconnected, and then, the alternating current contactor stops working because no current exists, and the whole circuit is disconnected, so that the electric connection between the power supply unit and external load equipment is disconnected, thereby realizing the safety control of the equipment quickly and efficiently, improving the efficiency and ensuring the safety as much as possible.
Or under the condition that the control button is triggered, the switch unit can be adjusted, for example, the switch unit is in an off state, so that the control alternating current contactor is turned off, and therefore, the process is convenient and fast because a circuit is not electrified, namely, the electric connection between the power supply unit and external load equipment is disconnected, and the efficiency of controlling the equipment is improved.
The function of the switch unit may be manually adjusted by a user, or may be automatically executed by a set program, or may be controlled by an instruction in the configured related electronic device, etc., which is not limited in the present invention.
In the whole circuit, each device and each functional unit that need to be powered on can be aligned by the power supply unit, and the relationship between each device, each functional unit and the power supply unit may not be fully shown in fig. 1, but is only schematically illustrated and is not meant to limit the present invention.
In the embodiment of the invention, under the condition that the control button is triggered, the circuit is cut off through the control unit or the switch unit, so that the electric connection between the power supply unit and the external load equipment is disconnected.
On the basis of the above embodiment, in order to further improve the convenience of circuit control, the switch unit may include a normally closed contact and a normally open contact, and a schematic structure of an apparatus safety control system provided in the embodiment of the present invention is described in detail below with reference to fig. 3.
Fig. 3 is a schematic diagram of an apparatus security control system according to an embodiment of the present invention.
The normally closed contact in the switch unit can be connected with the power supply unit and the safety relay, and the normally open contact can be connected with the alternating current contactor and the safety relay; in a state that the control button is not triggered, a normally open contact of the control switch unit is closed, and a safety relay is closed to enable the alternating current contactor to be closed so as to connect the power supply unit and external load equipment electrically; in a state where the control button is triggered, the normally closed contact of the control switch unit is opened, and the ac contactor is opened to disconnect the electrical connection between the power supply unit and the external load device.
The normally closed contact in the switching unit is understood to be a contact which is normally closed, and if it is opened, the switching unit is in a state of being opened and closed. The normally open contact in the switch unit can be understood as a contact in an open state under normal conditions, and if the normally open contact is closed, the switch unit can be conducted with a circuit, so that in the embodiment of the invention, whether the switch unit is turned on or not can be adjusted by controlling the normally closed contact and the normally open contact of the switch unit.
It can be understood that if the control button is not triggered, the normally open contact of the control switch unit is closed at this time, so that under the condition that the switch unit is conducted and electrified, the relay inside the safety relay can be closed, and under the condition that the safety relay works normally, the ac contactor can be closed, so that the whole circuit is conducted, and further, the connection of the electric connection between the power supply unit and the external load equipment is realized.
Or in the state that the control button is triggered, the normally closed contact of the switch unit can be controlled to be disconnected, so that the switch unit is disconnected with a circuit, the alternating current contactor can be disconnected, and the whole circuit is in a disconnected state, namely, the electric connection between the power supply unit and external load equipment is disconnected.
Therefore, in the embodiment of the invention, when the control button is triggered, the normally-closed contact of the switch unit can be regulated to cut off the circuit, so that the efficiency of controlling the equipment is improved, and the safety is higher.
Alternatively, the ac contactor may comprise a first control coil and at least one first contact switch, the first contact switch being connected between the power supply unit and the load device, the first control coil being connected to the safety relay and the power supply unit.
The first control coil is set to lose electricity when the safety relay is disconnected or when the normally closed contact of the switch unit is disconnected, so that the first contact switch is disconnected to disconnect the electrical connection between the power supply unit and external load equipment; the first control coil is further arranged to be energized when the normally open contact of the switching unit is closed to close the first contact switch to make an electrical connection between the power supply unit and the external load device.
Alternatively, the ac contactor may include a first contact switch, or may include a plurality of contact switches, which is not limited in the present invention.
It will be appreciated that the first control coil may be electrically conductive when current is present in the circuit, such as when a normally open contact of the switching unit is closed. Due to the electromagnetic attraction force, the first contact switch can be closed, so that the circuit is conducted, namely, the power supply unit and the external load equipment are electrically connected.
In addition, when no current exists in the circuit, the first control coil is powered off, at the moment, the electromagnetic attraction force is disappeared, the armature is released under the action of the release spring, the first contact switch is disconnected, and therefore the circuit is interrupted, and the electric connection between the power supply unit and external load equipment is disappeared. Therefore, if the safety relay is disconnected, or the normally closed contact of the switch unit is disconnected, the first control coil is powered off, and the first control coil and the normally closed contact can be powered off, so that the power supply unit and the external load equipment are disconnected.
Therefore, in the embodiment of the invention, the on state of the electric connection between the power supply unit and the external load equipment can be realized through the disconnection and the connection of the first control coil, so that the flow of equipment control is simplified, and the efficiency of equipment control is improved.
Optionally, the safety relay may include a power terminal, a plurality of first input terminals, and a plurality of first output terminals.
The power supply terminal may be connected to the power supply unit, wherein the two first input terminals are connected to the control unit, and wherein the two first output terminals are connected to the ac contactor and the switching unit, respectively.
Optionally, the safety relay may further comprise a plurality of second input terminals, wherein two of the second input terminals are connected to the control unit.
As shown in fig. 4, A1 and A2 are power terminals in the safety relay, the A1 end is a power positive electrode, and the A2 end is a power negative electrode. S11 and S12 are first input terminals connected to the control unit, 13 and 14 are first output terminals, 13 is connected to the switching unit, and 14 is connected to the ac contactor; s21 and S22 are second input terminals, which may also be connected to the control unit.
It is understood that the first input terminal and the second input terminal may be connected to the same input port of the control unit, or may be connected to different input ports, which is not limited by the present invention.
It should be noted that the foregoing examples are merely illustrative, and in a specific implementation, the circuit structure may be modified, for example, by adding or removing circuit components, or changing a connection relationship between circuits, etc., which are not limited in this invention.
It is understood that the control unit may also be a junction box, and the device security control system provided by the present invention is described in detail below with reference to fig. 5.
Wherein, the junction box can be provided with a control switch, and the control button is used for controlling the control switch to be opened or closed.
It is understood that the type or specification of the junction box may be various, for example, an EMO junction box (EMOBox), or any junction box with a control switch, etc., which is not limited by the present invention.
In addition, when the control button is not triggered, the circuit is in a normal conduction state, and all components in the circuit are in a normal working state; after the control button is triggered, part of components in the circuit are in a disconnected state due to no current, so that the power-off operation of the equipment can be rapidly realized by triggering the control button, the process is more convenient, and the efficiency is higher.
In addition, the control switch can be connected with the safety relay, and when the control switch is closed and the normally open contact of the switch unit is closed, the safety relay is closed; when the control switch is turned off, the safety relay is turned off.
Alternatively, the control switch may comprise a normally closed contact, so that when it is in the off state, i.e. the control switch is in the on state. If the control switch is in an off state, the current need of emergency braking can be indicated, and the safety relay is disconnected because the control switch is disconnected and the circuit is disconnected. For example, the internal relays K1 and K2 of the safety relay may be changed from a closed state to an open state, etc., which is not limited by the present invention.
Alternatively, the control buttons may be plural in number, and the plural control buttons may be connected in parallel to the control unit.
For example, as shown in fig. 5, the control buttons may be EMO buttons, the number of which may be set to 6, and may be referred to as EMO1, EMO2, EMO3, EMO4, EMO5, EMO6, and each control button is connected to a corresponding port of the control unit, which is not limited in the present invention.
Optionally, the control switch may further be provided with a plurality of normally-closed contacts, and the control button may be used for controlling the plurality of normally-closed contacts, and when any one of the normally-closed contacts is opened, the safety relay is opened.
It can be understood that, because the normally closed contacts are arranged in the control switch, the control switch is in a normal working state in a closed state, so that if any normally closed contact is disconnected, the circuit can be indicated to be possibly interrupted at the moment, and the safety relay is disconnected due to the disappearance of current, so that the circuit is interrupted, the control switch can be operated through the control button, and the operation of disconnecting the electric connection between the power supply unit and external load equipment is realized.
In addition, the number and the setting positions of the normally-closed contacts in the control switch can be in various conditions, such as two normally-closed contacts, three normally-closed contacts and the like, so that potential safety hazards caused by single-contact control switch faults can be avoided, and the control safety of the whole system is improved.
For example, the number of normally closed contacts in the control switch may be 3, and the setting position thereof may be as shown in fig. 6. Wherein S11 and S12 are a set of first input terminals in the safety relay, S21 and S22 are second input terminals in the safety relay, and XT5 and XT6 may be respectively connected to a positive power output terminal and a negative power output terminal of the power supply unit. In addition, H1 is an indicator lamp corresponding to EMO1, H2 is an indicator lamp corresponding to EMO1, H3 is an indicator lamp corresponding to EMO3, H4 is an indicator lamp corresponding to EMO4, H5 is an indicator lamp corresponding to EMO5, H6 is an indicator lamp corresponding to EMO6, and when the circuit is normally closed, the indicator lamps H1 to H6 are all lighted. If any EMO button is triggered, the normally closed contact in the corresponding control switch is disconnected, and the corresponding indicator lamp is turned off. For example, EMO3 is triggered, the entire circuit is interrupted, and the indicator lamp H3 corresponding thereto is also turned off.
It should be noted that the foregoing examples are only illustrative, and are not intended to limit the control buttons, the control units, the circuit connections thereof, and the like in the embodiments of the present invention.
It will be appreciated that there may be various situations where the actual circuit device or component corresponding to the control unit may be, for example, a programmable controller (programmable logic controller, PLC), and the above circuit system will be described in detail with reference to fig. 7.
Alternatively, in the case that the control unit is a PLC controller, the PLC controller may be signal-connected to the control button. In a state that the control button is triggered, the PLC controller is configured to control the safety relay to be disconnected when a trigger signal of the control button is received.
The corresponding modules, units and the like can be arranged in the PLC according to actual implementation conditions, and the invention is not limited to the corresponding modules, units and the like.
In addition, the trigger signal of the control button may be a signal set in advance, for example, a high level indicates that the control button is closed and normally works, a low level indicates that the control button is opened and not working, and the invention is not limited to this.
For example, if the circuit structure diagram of the device safety control system is shown in fig. 7, if the EMO1 button is triggered, the PLC controller may receive a corresponding trigger signal, and then may control the safety relay to be disconnected, so that the operation of disconnecting the electrical connection between the power supply unit and the external load device is achieved due to the circuit interruption.
Therefore, in the embodiment of the invention, the PLC can be arranged to operate the control button when emergency braking is needed, so that the PLC receives the corresponding trigger signal and controls the circuit by itself, thereby simplifying the flow of equipment control, improving the efficiency of equipment control, and greatly reducing the safety risk and improving the safety of equipment system control because a user does not need to electrically operate a specific circuit.
It will be appreciated that in the actual implementation, devices, units, etc. in the circuit may be adjusted as needed, for example, a circuit breaker may be further added to rapidly cut off the power supply, etc., and the above circuit will be described in detail with reference to fig. 8.
As can be seen from fig. 8, the circuit system further includes a first breaker and a second breaker.
The first circuit breaker can be arranged between the power supply unit and the first contact switch and can be used for switching on or off the electric connection between the power supply unit and external load equipment; the second circuit breaker may be disposed between the first circuit breaker and the control module, and may be used to turn on or off the power supply unit and the control module.
The first circuit breaker and the second circuit breaker may be circuit breakers of the same material or specification, or may also be different circuit breakers, for example, the first circuit breaker and the second circuit breaker may be plastic case circuit breakers, or may also be plastic case circuit breakers, the second circuit breaker is a common circuit breaker, and the invention is not limited thereto.
It will be appreciated that when power is required, the first and second circuit breakers may be closed to connect the power supply unit to the external load device and the control module. If emergency braking is needed, the first circuit breaker can be triggered to break the electric connection between the power supply unit and the external load equipment, so that a circuit can be conveniently interrupted, and the efficiency is high.
Optionally, the device security control system may further comprise a switching power supply.
The input end of the switching power supply can be connected to the second circuit breaker, the first output end of the switching power supply can be respectively connected to the safety relay and the switching unit, and the second output end of the switching power supply can be respectively connected to the control module, the safety relay and the alternating current contactor.
The switching power supply can be called as a switching power supply or a switching converter, is a high-frequency electric energy conversion device, and can convert a standard voltage into a required voltage or current through different forms of architectures, so that the rapid conversion of electric energy is realized, and the utilization rate of the electric energy is improved.
In addition, the first output end of the switching power supply can be the positive output end of the power supply, so that power is supplied to the safety relay and the switching unit; the second output end of the switching power supply can be a power supply negative electrode output end, so that the electric energy provided by the power supply can be converted into current or voltage which is suitable for the safety relay, the switching unit, the control module and the alternating current contactor through the switching power supply.
In addition, since the safety relay may include a plurality of connection terminals, the first output terminal of the switching power supply may be connected to the positive terminal of the power supply in the safety relay, and the second output terminal of the switching power supply may be connected to the negative terminal of the power supply in the safety relay.
Optionally, the device safety control system may further include a heavy-duty connector connected to the power supply unit. Wherein the power supply unit may be arranged to supply power to the control module and the external load device via the heavy-duty connector.
The following describes in detail the specific operation procedure of the device safety control system provided by the present invention with reference to fig. 8.
The heavy-load connector (XS 0) can be connected with the service end 208VAC of the power supply unit, then the first breaker QF0 can be controlled to be in a closed state, the second breaker QF1 is closed again to be in the closed state, and at the moment, the switch power supply (PS 1) is powered on, so that the indication lamps corresponding to the control buttons in the EMO junction box can be directly powered on. The normally open contact NO in the safety relay (SR 1) is closed by controlling the switch unit SW1, the relays K1 and K2 in the safety relay (SR 1) are closed, the coil of the alternating current contactor (KM 1) is electrified, the alternating current contactor is closed, the whole circuit is conducted, the electric components outside the equipment electrical cabinet are electrified, and when the EMO button is not triggered, the green lights of all the indicator lamps are lighted.
If an emergency occurs, any EMO button can be triggered, a corresponding green indicator lamp in the EMO junction box is extinguished, the internal circuit breakers K1 and K2 of the safety relay are disconnected, the coil of the alternating-current contactor is powered off, and the alternating-current contactor is disconnected. Alternatively, the normally closed contact NC of the switching unit may be controlled to be opened to cause the ac contactor coil to be deenergized and opened, thereby interrupting the circuit and realizing a cutting operation of the electrical connection between the power supply unit and the external load device.
On the basis of the above embodiment, in the case that the control unit is a PLC controller, an apparatus safety control system provided by the present invention may be as shown in fig. 9.
Wherein, the one end of heavy load connector is connected in power supply unit, the other end can be connected in first circuit breaker, the first output of first circuit breaker can be connected in load equipment, the second output of first circuit breaker can be connected in the second circuit breaker, the output of second circuit breaker can be connected in switching power supply, switching power supply's first output can be connected in safety relay's power positive terminal and switch unit respectively, switching power supply's second output can be connected in PLC controller's power supply end respectively, safety relay's power negative terminal and ac contactor, ac contactor and safety relay are connected in PLC control's input respectively, an EMO button is connected respectively to PLC controller's output.
If any EMO button is triggered, the PLC controller can control the safety relay to be disconnected after receiving the triggering signal of any EMO button, so that the power supply unit and the external load equipment are disconnected.
In the embodiment of the invention, the PLC can be arranged, when emergency braking is needed, the PLC can control the circuit by itself according to the received trigger signal by operating the control button, so that the flow of equipment control is simplified, the efficiency of equipment control is improved, and meanwhile, the safety risk is greatly reduced and the safety of equipment system control is improved because the user does not need to electrically operate a specific circuit.

Claims (10)

1. The equipment safety control system is characterized by comprising a power supply unit, a switch unit, an alternating current contactor, a safety relay and a control module;
the power supply unit is used for supplying power to the switch unit, the control module and external load equipment;
the switch unit is connected between the power supply unit and the alternating current contactor, the alternating current contactor is connected with the safety relay, and the safety relay is connected with the switch unit;
the control module comprises a control unit and a control button, wherein the control unit is connected with the safety relay, and the control button is connected with the control unit;
wherein the control unit is configured to be able to control the safety relay to be disconnected in a state in which the control button is triggered, so as to disconnect the ac contactor, to disconnect the electrical connection between the power supply unit and an external load device; the switch unit is arranged to control the safety relay to be closed so as to close the alternating current contactor to connect the power supply unit and the external load equipment in a state that the control button is not triggered; in a state where the control button is triggered, the ac contactor can be controlled to be opened to disconnect the electrical connection between the power supply unit and the external load device.
2. The plant safety control system according to claim 1,
the switch unit comprises a normally closed contact and a normally open contact, the normally closed contact is connected with the power supply unit and the safety relay, and the normally open contact is connected with the alternating current contactor and the safety relay;
in a state that the control button is not triggered, controlling a normally open contact of the switch unit to be closed, and closing the safety relay to enable the alternating current contactor to be closed so as to connect the power supply unit and external load equipment electrically;
and in a state that the control button is triggered, the normally closed contact of the switch unit is controlled to be opened, and the alternating current contactor is opened to disconnect the electric connection between the power supply unit and external load equipment.
3. The plant safety control system according to claim 2,
the alternating current contactor comprises a first control coil and at least one first contact switch, the first contact switch is connected between the power supply unit and load equipment, and the first control coil is connected with the safety relay and the power supply unit;
the first control coil is configured to lose electricity when the safety relay is opened or when a normally closed contact of the switching unit is opened, so that the first contact switch is opened to disconnect the electrical connection between the power supply unit and external load equipment;
the first control coil is further arranged to be energized when a normally open contact of the switching unit is closed to close the first contact switch to close an electrical connection between the power supply unit and an external load device.
4. The plant safety control system according to claim 2,
the safety relay comprises a power supply terminal, a plurality of first input terminals and a plurality of first output terminals;
the power supply terminal is connected to the power supply unit;
wherein two first input terminals are connected to the control unit, wherein two first output terminals are connected to the ac contactor and the switching unit, respectively.
5. The plant safety control system according to claim 2,
the control unit is a junction box, the junction box is provided with a control switch, and the control button is used for controlling the control switch to be turned off or turned on;
the control switch is connected with the safety relay;
the safety relay is closed when the control switch is closed and the normally open contact of the switch unit is closed; when the control switch is turned off, the safety relay is turned off.
6. The plant safety control system according to claim 3,
the control switch is provided with a plurality of normally-closed contacts, and the control button is used for controlling the plurality of normally-closed contacts;
when any normally closed contact is disconnected, the safety relay is disconnected.
7. The plant safety control system according to claim 1,
the control unit is a PLC controller, and the PLC controller is in signal connection with the control button;
and in a state that the control button is triggered, the PLC is configured to control the safety relay to be disconnected when a trigger signal of the control button is received.
8. The plant safety control system according to claim 6,
the equipment safety control system further comprises a first circuit breaker and a second circuit breaker;
the first circuit breaker is arranged between the power supply unit and the first contact switch and is used for switching on or switching off the electric connection between the power supply unit and external load equipment;
the second circuit breaker is arranged between the first circuit breaker and the control module and is used for switching on or switching off the power supply unit and the control module.
9. The plant safety control system according to claim 8,
the equipment safety control system further comprises a switching power supply, wherein the input end of the switching power supply is connected with the second circuit breaker, the first output end of the switching power supply is respectively connected with the safety relay and the switching unit, and the second output end of the switching power supply is respectively connected with the control module, the safety relay and the alternating current contactor.
10. The appliance safety control system of claim 1, further comprising a heavy-duty connector connected to the power supply unit;
the power supply unit is configured to supply power to the control module and the external load device through the heavy-duty connector.
CN202310294328.8A 2023-03-23 2023-03-23 Equipment safety control system Pending CN116247624A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310294328.8A CN116247624A (en) 2023-03-23 2023-03-23 Equipment safety control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310294328.8A CN116247624A (en) 2023-03-23 2023-03-23 Equipment safety control system

Publications (1)

Publication Number Publication Date
CN116247624A true CN116247624A (en) 2023-06-09

Family

ID=86631371

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310294328.8A Pending CN116247624A (en) 2023-03-23 2023-03-23 Equipment safety control system

Country Status (1)

Country Link
CN (1) CN116247624A (en)

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Address after: 100176 building 12, yard 156, Jinghai 4th Road, Beijing Economic and Technological Development Zone, Daxing District, Beijing

Applicant after: Dongfang Jingyuan Microelectronics Technology (Beijing) Co.,Ltd.

Address before: 100176 building 12, yard 156, Jinghai 4th Road, Beijing Economic and Technological Development Zone, Daxing District, Beijing

Applicant before: DONGFANG JINGYUAN ELECTRON Ltd.