CN209948670U - Emergency stop device of direct-current power supply circuit and direct-current power supply circuit - Google Patents
Emergency stop device of direct-current power supply circuit and direct-current power supply circuit Download PDFInfo
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- CN209948670U CN209948670U CN201921097413.0U CN201921097413U CN209948670U CN 209948670 U CN209948670 U CN 209948670U CN 201921097413 U CN201921097413 U CN 201921097413U CN 209948670 U CN209948670 U CN 209948670U
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Abstract
The embodiment of the utility model provides an in provide a DC power supply circuit's scram device and DC power supply circuit, include: a direct current power supply; the contact of the first contactor is connected with the output end of the direct current power supply; a load circuit connected in series with the contacts of the first contactor; a contact of a second contactor connected in parallel with the load circuit; a power device connected in series with the contact of the second contactor; and an emergency stop circuit connected with the coils of the first contactor and the second contactor; when the emergency stop circuit is started, the contact of the first contactor is switched from a closed state to an open state, the direct-current power supply is disconnected from the line where the load circuit is located, the contact of the second contactor is switched from the open state to the closed state, and the load circuit is conducted with the line where the power device is located. Adopt the utility model provides a scheme, when direct current power supply scram, the contact closure through the second contactor makes load circuit and power device place circuit switch on, and remaining voltage among the accessible power device consumption load circuit eliminates the adverse effect of scram to components and parts in operating personnel and the load.
Description
Technical Field
The utility model relates to a direct current power supply circuit technique specifically relates to a direct current power supply circuit's scram device and direct current power supply circuit.
Background
Usually, a plurality of groups of capacitors are connected in parallel in a load at an output end of a high-power servo ground direct-current power supply and used for stabilizing direct-current voltage and absorbing electric energy, the connection between the output end of the direct-current power supply and the load is cut off by pressing an emergency stop button under an emergency condition of the high-power direct-current power supply, and a large amount of residual electric energy still remains in the load to keep the output end at high voltage. The existence of residual electric energy poses a great potential safety hazard for operators, so that an emergency stop device which can cut off the output in an emergency and simultaneously automatically discharge the residual electric energy in the load is needed.
At present, the common sudden stop modes of the high-power direct-current power supply include the following modes:
1. the direct current power supply is disconnected through the circuit breaker, namely, a circuit breaker connected at the input end of the direct current power supply in series is used for shifting a circuit breaker switch under emergency conditions to cut off the power supply of the direct current power supply, and the mode has poor safety and is easy to damage the power supply.
2. The direct current power supply output path is disconnected through the contactor, namely, when the emergency stop button is pressed down through the contactor connected in series on the direct current power supply positive electrode path, the contact of the contactor is switched from closed to open, and the switching-off effect is achieved. In the emergency stop mode, the residual electric energy in the load cannot be released quickly, the safety of operators is threatened, and elements in the load are influenced easily to cause harm.
Because the existing emergency stop mode has the hidden trouble, an emergency stop mode is needed to solve the problem.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an in provide a DC power supply circuit's scram device and DC power supply circuit, solve the problem of the unable quick release of residual electric energy or fragile power in the load in the current scram mode.
According to the utility model discloses a first aspect of the embodiment provides a dc power supply circuit's scram device, include:
a direct current power supply;
the contact of the first contactor is connected with the output end of the direct current power supply;
a load circuit connected in series with the contacts of the first contactor;
a contact of a second contactor connected in parallel with the load circuit;
a power device connected in series with the contact of the second contactor; and the number of the first and second groups,
the emergency stop circuit is connected with the coils of the first contactor and the second contactor;
when the emergency stop circuit is started, the contact of the first contactor is switched from a closed state to an open state, the direct-current power supply is disconnected from the line where the load circuit is located, the contact of the second contactor is switched from the open state to the closed state, and the load circuit is conducted with the line where the power device is located.
Optionally, the power device comprises: and a power resistor connected in series with the contact of the second contactor.
Optionally, the power device further comprises:
a first indicator light connected in parallel with the power resistor and then connected in series with the contact of the second contactor, an
And the current limiting resistor is connected with the first indicator lamp in series.
Optionally, the emergency stop circuit comprises:
a power supply source is used for supplying power,
and the coil of the first contactor and the coil of the second contactor are connected in parallel and then are connected with the first emergency stop button in series.
Optionally, the emergency stop circuit further comprises:
the first normally open contact is arranged on a branch of the first contactor where a coil is located;
and the first normally closed contact is arranged on the branch of the coil of the second contactor.
Optionally, the emergency stop circuit further comprises:
a second indicator light connected in parallel with the coil of the first contactor and the coil of the second contactor, and,
and the second normally closed contact is arranged on the relay of the branch where the second indicator light is located.
Optionally, the emergency stop device further comprises:
a second emergency stop button connected to the output of the power supply source via a transmission cable, an
And the first emergency stop button and the second emergency stop button are respectively connected with the two-position selection switch.
Optionally, at least one capacitor and a discharge switch are disposed in the dc power supply, and when the discharge switch is pressed, the capacitor discharges.
Optionally, the magnitude of power dissipation of the power device is related to the capacitance value in the load circuit.
According to a second aspect of the embodiments of the present invention, there is provided a dc power circuit, including the emergency stop device described above.
Adopt the embodiment of the utility model provides a direct current power supply circuit's scram device and direct current power supply circuit, when direct current power supply scram, the contact closure through the second contactor makes load circuit and power device place circuit switch on, and remaining voltage among the accessible power device consumption load circuit eliminates the harmful effects of scram to components and parts in operating personnel and the load, improves direct current power supply's security.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
fig. 1 shows a schematic circuit diagram of an emergency stop device according to an embodiment of the present invention;
fig. 2 shows a schematic circuit diagram of an emergency stop circuit according to an embodiment of the present invention.
Wherein, in the figure:
1. the system comprises a direct-current power supply, a first contactor, a load circuit, a second contactor, a power device, a power supply, a first emergency stop button, a first normally open contact of a relay, a first normally closed contact of the relay, a second emergency stop button, a second emergency;
r1, power resistor, L1, first indicator light, R2, current limiting resistor, L2 and second indicator light.
Detailed Description
In realizing the utility model discloses an in-process, the inventor finds that high-power DC power supply can cut off being connected of DC power supply output and load through pressing the scram button under meetting emergency, still remains a large amount of residual electric energy in the load and makes the output keep high voltage. The existence of residual electric energy creates a huge potential safety hazard for operators.
To the above problem, the embodiment of the utility model provides a direct current power supply circuit's scram device and direct current power supply circuit, when direct current power supply scram, the contact closure through the second contactor makes load circuit and power device place circuit switch on, and remaining voltage among the accessible power device consumption load circuit eliminates the harmful effects of scram to components and parts in operating personnel and the load, improves direct current power supply's security.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
In order to make the technical solutions and advantages of the embodiments of the present invention more clearly apparent, the following description of the exemplary embodiments of the present invention with reference to the accompanying drawings is made in further detail, and it is obvious that the described embodiments are only some of the embodiments of the present invention, and are not exhaustive of all the embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
As shown in fig. 1, the emergency stop device of the dc power circuit according to the embodiment of the present invention includes:
a direct current power supply 1;
a contact of the first contactor 2 connected with the output end of the direct current power supply 1;
a load circuit 3 connected in series with the contacts of the first contactor 2;
a contact of the second contactor 4 connected in parallel with the load circuit 3;
a power device 5 connected in series with the contacts of the second contactor 4; and the number of the first and second groups,
an emergency stop circuit connected to the coil of the first contactor 2 and the coil of the second contactor 4;
when the emergency stop circuit is started, the contact of the first contactor 2 is switched from a closed state to an open state, the line where the direct current power supply 1 and the load circuit 3 are located is disconnected, the contact of the second contactor 4 is switched from the open state to the closed state, and the line where the load circuit 3 and the power device 5 are located is conducted. Therefore, when the direct-current power supply is in sudden stop, the contact of the second contactor 4 is closed to conduct the line where the load circuit 3 and the power device 5 are located, the residual voltage in the load circuit 3 can be consumed through the power device 5, and the adverse effect of the sudden stop on an operator and components in the load is eliminated.
Optionally, as shown in fig. 1, the power device 5 includes a power resistor R1 connected in series with a contact of the second contactor 4, after the emergency stop circuit is started, the contact of the first contactor 2 is switched from a closed state to an open state, the dc power supply 1 stops supplying power to the load circuit 3, and at the same time, the contact of the second contactor 4 is switched from the open state to the closed state, a line where the load circuit 3 and the power resistor R1 are located is turned on, and the power resistor R1 is configured to consume the remaining power of the load circuit 3, so as to eliminate adverse effects of the emergency stop on an operator and components in the load, and improve the safety of the dc power supply circuit.
Further, the magnitude of the power consumption of the power device 5 is related to the capacitance value in the load circuit 3. Specifically, the device can adopt the modularized design, and each module can be changed according to actual conditions. If the discharge time needs to be adjusted, the discharge time can be adjusted according to the RC time factor formula: and t is R × C, and the discharge time is adjusted by selecting the size of the power resistor R according to the size of the capacitor. At 3.5t, the capacitor voltage in the load circuit 3 may substantially drain.
Further, the power device 5 further includes: the first indicator light L1 is connected with the contact of the second contactor 4 in series after the first indicator light L1 is connected with the power resistor R1 in parallel; and a current limiting resistor R2 connected in series with the first indicator light L1. After the scram circuit is started, the contact of the first contactor 2 is switched from a closed state to an open state, the direct current power supply 1 stops supplying power to the load circuit 3, meanwhile, the contact of the second contactor 4 is switched from the open state to the closed state, the load circuit 3 and a line where the first indicator light L1 is located are conducted, the first indicator light L1 emits light under the action of the residual capacity of the load circuit 3, the power resistor R1 is indicating that the residual capacity of the load circuit 3 is consumed, and when the first indicator light L1 is turned off, the residual capacity of the load circuit 3 is indicating to be consumed.
Specifically, a first terminal of the dc power supply 1 is connected to a first terminal of a contact of the first contactor 2, and a second terminal of the dc power supply 1 is connected to the load circuit 3. The second ends of the contacts of the first contactor 2 are also connected to the first ends of the contacts of the second contactor 4. A first end of the contact of the second contactor 4 is connected to a first end of the load circuit 3, and a second end of the contact of the second contactor 4 is connected to a first end of the power resistor R1. A first terminal of the current limiting resistor R2 is connected to a first terminal of the power resistor R1, and a second terminal of the current limiting resistor R2 is connected to a first terminal of the first indicator light L1 (or referred to as a discharge indicator light). A second terminal of the first indicator light L1 is connected to a second terminal of the power resistor R1 and also connected to a second terminal of the load circuit 3.
Optionally, in another embodiment of the present invention, as shown in fig. 2, the emergency stop circuit includes: the emergency stop device comprises a power supply 6 and a first emergency stop button 7 connected with the output end of the power supply 6, wherein a coil of the first contactor 2 is connected with a coil of the second contactor 4 in parallel and then connected with the first emergency stop button 7 in series.
Further, the scram circuit further comprises: a first normally open contact 8 of the relay arranged on the branch where the coil of the first contactor 2 is located; and a first normally closed contact 9 of the relay arranged in the branch of the coil of the second contactor 4.
Further, the scram circuit further comprises: a second indicator light L2 connected in parallel with the coil of the first contactor 2 and the coil of the second contactor 4, and a second normally closed contact 10 of the relay arranged on the branch where the second indicator light L2 is located.
Wherein, in other embodiments of the present invention, the emergency stop device further comprises: a second emergency stop button 11, the second emergency stop button 11 is connected with the output end of the power supply 6 through a transmission cable, and a two-position selection switch 12, the first emergency stop button 7 and the second emergency stop button 11 are respectively connected with the two-position selection switch 12. In this way, the two-position selector switch 12 is used for switching between remote control and local control emergency stop, the first emergency stop button 7 or the second emergency stop button 11 is used for triggering the contact of the first contactor 2 and the contact of the second contactor 4 to switch circuit lines, and the power resistor R1 is used for discharging residual electric energy. During the discharging process, a discharge indicating circuit (composed of a current limiting resistor R2 and a first indicator lamp L1) is used for indicating the discharging process, the first indicator lamp L1 lights to indicate that the discharging process is in progress, and the first indicator lamp L1 lights to indicate that the discharging process is finished. The device consists of a power resistor module and a discharge indicating circuit module.
Specifically, a first end of the second indicator light L2 is connected to a first end of a coil of the second contactor 4, and a second end of the second indicator light L2 is connected to a first end of a second normally closed contact 10 of the relay; the second end of the coil of the second contactor 4 is connected to the first end of the first normally closed contact 9 of the relay, and the second end of the first normally closed contact 9 of the relay is connected to the second end of the second normally closed contact 10 of the relay. The first end of the coil of the first contactor 2 is connected to the first end of the coil of the second contactor 4, the first end of the coil of the first contactor 2 is also connected to the first end of the power supply 6, and the power supply 6 is a 24V direct current power supply. The second end of the solenoid of first contactor 2 is connected in the first end of the first normally open contact 8 of relay, and the second end of the first normally open contact 8 of relay is connected in the second end of the first normally closed contact 9 of relay, and the second end of the first normally open contact 8 of relay still connects in the second end of 24V's power supply 6. A first end of the power supply 6 is connected to a first end of the remote-control emergency stop socket 14, and a second end of the power supply 6 is connected to a second end of the relay coil 13. The first end of the coil 13 of the relay is connected to the second end of the first emergency stop button 7 (i.e. the local control emergency stop button), the first end of the first emergency stop button 7 is connected to the second end of the two-position selector switch 12, the first end of the two-position selector switch 12 is connected to the second end of the remote control emergency stop socket 14, and the third end of the two-position selector switch 12 is connected to the first end of the remote control emergency stop socket 14. A first end of the remote-control emergency stop socket 14 is connected to a first end of the second emergency stop button 11 (i.e., the remote-control emergency stop button), and a second end of the remote-control emergency stop socket 14 is connected to a second end of the second emergency stop button 11.
Further, the embodiment of the utility model provides an in be provided with at least one electric capacity and discharge switch in the DC power supply, electric capacity discharges when discharge switch is pressed, and in equipment normal use process, after DC power supply closed, the operating personnel accessible was pressed the electric quantity that discharge switch discharged to the electric capacity of DC power supply inside, prevents that personnel from taking place danger.
Adopt the utility model discloses the scram device of DC power supply circuit that provides in the above-mentioned embodiment, when DC power supply scram, the contact closure through the second contactor makes load circuit and power device place circuit switch on, and the residual voltage among the accessible power device consumption load circuit eliminates the harmful effects of scram to components and parts in operating personnel and the load, improves DC power supply's security.
The embodiment of the utility model provides a still provide a direct current power supply circuit, including above-mentioned embodiment emergency stop device, the embodiment of above-mentioned emergency stop device all is applicable to this direct current power supply circuit's embodiment, and can reach the same or similar technological effect.
Specifically, the emergency stop device of the direct-current power supply circuit can be arranged in the cabinet, the first emergency stop button can be arranged on the cabinet, the remote-control emergency stop socket is also arranged on the cabinet, and the second emergency stop button is inserted into the remote-control emergency stop socket through a cable so as to realize remote emergency stop control. Furthermore, the emergency stop device can replace related components according to the requirements of technical indexes in use. Therefore, the first emergency stop button is designed and installed on the front panel of the cabinet of the direct-current power supply, and operation is convenient. The on-off of the solenoid of the first contactor and the second contactor is controlled through the emergency stop button, so that the on-off of the main contact of the contactor is controlled. The main contact is connected in series with the DC output line, so that the emergency cut-off of the DC output can be realized.
In addition, a remote control emergency stop socket is further arranged on the machine cabinet, and remote emergency stop can be realized by connecting a remote control emergency stop cable. The first emergency stop button is connected in series at the coil positions of the first contactor and the second contactor, the cables are led out to the cabinet body in parallel and connected with the second emergency stop button, and remote emergency stop operation can be performed on the equipment. The remote control emergency stop and the local control emergency stop are switched by a two-position selection switch, and in the remote control emergency stop state, the remote control emergency stop can be operated and the local control emergency stop can be used for emergency stop.
Specifically, the emergency stop device of the direct-current power supply circuit is fixed at a proper position of a panel and the inside of the ground cabinet through screws and is connected with each component through a preset port. After the direct-current power supply is electrified, the output end of the direct-current power supply keeps output voltage, when the first emergency stop button or the second emergency stop button is not pressed, the circuit where the first emergency stop button and the second emergency stop button are located is closed, the relay coil on the circuit is electrified, as the first normally open contact of the relay is connected in series with the coil of the first contactor, under the condition that the coil of the relay is electrified, the first normally open contact of the relay is reversely closed, the circuit where the contact of the first contactor is located is conducted, the voltage output by the output end of the direct-current power supply reaches the load circuit, and power supply to the load circuit is achieved. Meanwhile, the first normally closed contact of the relay is connected in series with the coil of the second contactor, so that the first normally closed contact of the relay is reversely disconnected and a line where the contact of the second contactor is located is disconnected under the condition that the coil of the relay is electrified.
When emergency needs the power supply to stop suddenly, because the existence of the electric capacity in the load circuit, the load side still keeps high voltage, at this moment, needs to carry out the automatic operation of releasing of scram. After the first emergency stop button or the second emergency stop button is pressed, the circuit where the first emergency stop button and the second emergency stop button are located is disconnected, the relay coil on the circuit is uncharged, due to the fact that the first normally open contact of the relay is connected with the coil of the first contactor in series, under the condition that the coil of the relay is uncharged, the first normally open contact of the relay is in a disconnected state, the coil of the first contactor is uncharged, the circuit where the contact of the first contactor is located is disconnected, and the output end of the direct-current power supply stops supplying power for the load circuit. Meanwhile, the first normally closed contact of the relay is connected in series with the coil of the second contactor, so that the first normally closed contact of the relay is in a closed state under the condition that the coil of the relay is not electrified, the coil of the second contactor is electrified, a circuit where the contact of the second contactor is located is conducted, and the load circuit and the power device form a closed loop to perform automatic discharge. Whether the discharge is finished or not can be indicated through the first indicator lamp and the direct current power supply upper screen, and when the first indicator lamp is turned off and the direct current power supply upper screen displays that the current voltage is reduced to a specified value (usually 0V), the discharge is finished.
The utility model discloses an interface of being connected with DC power supply carries out simple connection and just can realize DC power supply remote control and this accuse scram automatic residual electric energy of releasing in the load circuit. The power resistor is used as a core component to consume the residual electric energy stored in the load circuit, the remote control emergency stop button or the local control emergency stop button is pressed down, the contacts of the first contactor and the second contactor are connected to realize the opening and closing actions, and meanwhile, the first indicator lamp indicates the release process. The device has the advantages of convenience in installation, simplicity in operation, high safety, remote control and local control, rapid release, modularization and the like.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An emergency stop device for a DC power supply circuit, comprising:
a direct current power supply;
the contact of the first contactor is connected with the output end of the direct current power supply;
a load circuit in series with the contacts of the first contactor;
a contact of a second contactor connected in parallel with the load circuit;
a power device in series with the contacts of the second contactor; and the number of the first and second groups,
the emergency stop circuit is connected with the coils of the first contactor and the second contactor;
when the emergency stop circuit is started, the contact of the first contactor is switched to an open state from a closed state, the direct-current power supply is disconnected from the line where the load circuit is located, the contact of the second contactor is switched to the closed state from the open state, and the load circuit is connected with the line where the power device is located.
2. The scram apparatus of the direct current power supply circuit according to claim 1, wherein the power device comprises: and the power resistor is connected with the contact of the second contactor in series.
3. The emergency stop device of the dc power supply circuit according to claim 2, wherein the power device further comprises:
a first indicator light connected in parallel with the power resistor and then connected in series with the contact of the second contactor, and
and the current limiting resistor is connected with the first indicator lamp in series.
4. The emergency stop device of the dc power supply circuit according to claim 1, wherein the emergency stop circuit comprises:
a power supply source is used for supplying power,
and the coil of the first contactor and the coil of the second contactor are connected in parallel and then are connected with the first emergency stop button in series.
5. The emergency stop device of the dc power supply circuit according to claim 4, wherein the emergency stop circuit further comprises:
the first normally open contact is arranged on the relay of the branch where the coil of the first contactor is located;
and the first normally closed contact is arranged on the branch of the coil of the second contactor.
6. The emergency stop device of the dc power supply circuit according to claim 4, wherein the emergency stop circuit further comprises:
a second indicator light connected in parallel with the coil of the first contactor and the coil of the second contactor, and,
and the second normally closed contact is arranged on the branch of the second indicator light.
7. The emergency stop device of the dc power supply circuit according to claim 4, further comprising:
a second emergency stop button connected with the output of the power supply source by a transmission cable, an
And the first emergency stop button and the second emergency stop button are respectively connected with the two-position selection switch.
8. The emergency stop device of the dc power supply circuit according to claim 1, wherein at least one capacitor and a discharge switch are provided in the dc power supply, and when the discharge switch is pressed, the capacitor is discharged.
9. The emergency stop apparatus of the dc power supply circuit according to claim 1, wherein a magnitude of power consumption of the power device is related to a capacitance value in the load circuit.
10. A dc power supply circuit comprising the emergency stop device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921097413.0U CN209948670U (en) | 2019-07-12 | 2019-07-12 | Emergency stop device of direct-current power supply circuit and direct-current power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921097413.0U CN209948670U (en) | 2019-07-12 | 2019-07-12 | Emergency stop device of direct-current power supply circuit and direct-current power supply circuit |
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| CN209948670U true CN209948670U (en) | 2020-01-14 |
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| CN201921097413.0U Active CN209948670U (en) | 2019-07-12 | 2019-07-12 | Emergency stop device of direct-current power supply circuit and direct-current power supply circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301031A (en) * | 2022-03-03 | 2022-04-08 | 广东电网有限责任公司珠海供电局 | Emergency stop device of live working robot of transformer substation |
| CN118033490A (en) * | 2024-04-15 | 2024-05-14 | 山东云开电力有限公司 | Safe power supply detection circuit of power switch cabinet |
-
2019
- 2019-07-12 CN CN201921097413.0U patent/CN209948670U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301031A (en) * | 2022-03-03 | 2022-04-08 | 广东电网有限责任公司珠海供电局 | Emergency stop device of live working robot of transformer substation |
| CN118033490A (en) * | 2024-04-15 | 2024-05-14 | 山东云开电力有限公司 | Safe power supply detection circuit of power switch cabinet |
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