CN220938854U - Indoor smoke alarm and smoke exhaust device for 110KV substation - Google Patents
Indoor smoke alarm and smoke exhaust device for 110KV substation Download PDFInfo
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- CN220938854U CN220938854U CN202322771847.7U CN202322771847U CN220938854U CN 220938854 U CN220938854 U CN 220938854U CN 202322771847 U CN202322771847 U CN 202322771847U CN 220938854 U CN220938854 U CN 220938854U
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- 239000000779 smoke Substances 0.000 title claims abstract description 121
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000035945 sensitivity Effects 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims 4
- 230000002457 bidirectional effect Effects 0.000 claims 2
- 239000003245 coal Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model provides an indoor smoke alarm smoke exhaust device of a 110KV substation, which belongs to the field of coal mine power supply safety and comprises a linkage controller, a smoke sensor, an alarm and an exhaust fan, wherein a normally open contact K1-1 of a strong current relay K1 is connected in parallel between a terminal NO1 and a terminal C1 of the linkage controller, a normally open contact K2-1 of a weak current relay K2 is connected in parallel between a terminal NO2 and a terminal C2 of the linkage controller, at least one smoke sensor is electrically connected with the linkage sensor, the alarm is connected between the terminal NO2 and the terminal C2 of the linkage controller after being connected in series with a direct current power supply, the exhaust fan is connected between the terminal NO1 and the terminal C1 of the linkage controller after being connected in series with an alternating current power supply, the linkage controller and the smoke sensor are respectively connected to the direct current power supply, and only at least one smoke sensor, one linkage controller, one alarm and one exhaust fan are required to be installed in the power substation, and a connection circuit of a switch cabinet is not required to be changed.
Description
Technical Field
The utility model relates to the technical field of coal mine power supply safety, in particular to an indoor smoke alarm and smoke exhaust device of a 110KV substation.
Background
In order to transmit electric energy generated by a power plant to a remote place, the voltage must be increased to a high voltage, the voltage must be reduced as needed to the vicinity of a user, and the voltage increase and decrease is performed by the transformer station. The main equipment of the substation is a switch and a transformer. According to different sizes, the small transformer station is called as a substation, and the transformer station is larger than the substation. The substation refers to a step-down substation with the voltage level below 110kV, the substation comprises step-up and step-down substations with various voltage levels, in the using process of the substation, the switch room of the substation has the situations of cable overheat, smoke and fire or switch cabinet smoke and fire and other accidents, and is currently patrolled on site by staff, but if staff on site patrolling do not find in time, huge hidden danger is brought to the safe operation of a power supply system, and some enterprises can install a complete fireproof system in the switch room, but the complete fireproof system in the market is expensive, complex in system and complex in installation, so that the cost of the enterprises is greatly increased, and the development of the enterprises is unfavorable.
Disclosure of utility model
The utility model aims to solve the technical problem of how to design a smoke alarm and smoke exhaust device with simple structure and convenient installation.
The utility model solves the technical problems through the following technical scheme: the utility model provides an indoor smoke alarm fume extractor of 110KV electric substation, including the coordinated controller, smoke sensor, the alarm, the air discharge fan, the coordinated controller includes strong current relay K1, weak point relay K2, strong current relay K1's normally open contact K1-1 connects in parallel between coordinated controller's terminal NO1 and terminal C1, weak current relay K2's normally open contact K2-1 connects in parallel between coordinated controller's terminal NO2 and terminal C2, at least one smoke sensor is connected with coordinated sensor electricity, the alarm is connected between coordinated controller's terminal NO2 and terminal C2 after establishing ties with DC power supply, the air discharge fan is connected between coordinated controller's terminal NO1 and terminal C1 after establishing ties with AC power supply, coordinated controller and smoke sensor are connected to DC power supply respectively.
The smoke alarm smoke exhaust device only needs to install at least one smoke sensor in a power substation, a linkage controller, an alarm and an exhaust fan, the output end of the smoke sensor is directly connected to the input end of the linkage controller, a strong current relay and a weak current relay are arranged in the linkage controller, normally open contacts of the weak current relay are connected in a loop of the alarm, normally open contacts of the strong current relay are connected in a loop of the exhaust fan, a connecting circuit of a switch cabinet does not need to be changed, the whole device is simple in structure and convenient to install, enterprises do not need to purchase a complete fireproof system, and the original on-site exhaust fan can be adopted, so that the cost of additionally installing the smoke alarm smoke exhaust device is greatly reduced.
Preferably, the type of the linkage controller is RS822, the linkage controller further includes a first control circuit and a second control circuit, the first control circuit is identical to the second control circuit, two input terminals of the chip U1 are an input terminal Z1 and an input terminal C of the linkage controller, the power VCC is connected to a first pin of the chip U1, a second pin of the chip U1 is grounded, a resistor R9 is connected between the first pin and the second pin of the chip U1 in parallel with a capacitor C9, a third pin of the chip U1 is connected with an anode of a zener diode D1, a cathode of the zener diode D1 is connected with one end of the resistor R1, a capacitor C4 is connected between a cathode of the diode D1 and the second pin of the chip U1 in parallel, the other end of the resistor R1 is connected with a cathode of the diode D2, an anode of the diode D2 is connected with a cathode of the diode D3, an anode of the diode D3 is grounded, an anode of the diode D2 is also connected with the anode of the diode D9 in parallel with the capacitor C9, the anode of the diode D4 is connected with the cathode of the diode D4, the other end of the diode D8 is connected with the other end of the diode D5 in parallel with the resistor C1, and the other end of the diode D6 is connected with the two ends of the diode D1, and the two ends of the diode D5 is connected with the two ends of the diode D1 in parallel with the resistor 2, and the two ends of the diode 2 is connected with the two ends of the diode 2, and the two end of the resistor is connected with the two end of the diode 2, and the diode 2 is connected with the two end of the diode 2 is connected with the two end 2.
Preferably, the smoke alarm is of the type RS812A, the first input terminal of the smoke sensor is connected with the positive electrode of the direct current power supply, the second input terminal of the smoke sensor is connected with the negative electrode of the direct current power supply, the third output terminal of the smoke sensor is connected with the input terminal Z1 of the linkage controller, and the fourth output terminal of the smoke sensor is connected with the input terminal C of the linkage controller.
Preferably, one end of the alarm is connected with an output terminal C2 of the linkage controller, the other end of the alarm is connected with a negative electrode of the direct current power supply, and an output terminal NO2 of the linkage controller is connected with a positive electrode of the direct current power supply.
Preferably, one end of the exhaust fan is connected with an output terminal C1 of the linkage controller, the other end of the exhaust fan is connected with a zero line of the alternating current power supply, and an output terminal NO1 of the linkage controller is connected with a live line of the alternating current power supply.
Preferably, the input terminal R of the coordinated controller is connected to the positive electrode of the dc power supply, and the input terminal B is connected to the negative electrode of the dc power supply.
Preferably, the linkage controller is also connected with wired door magnet or wired infrared or infrared correlation alarm equipment.
Preferably, the sensitivity of the smoke alarm is 0.2db/m, and the protection area is 60m 2.
Preferably, the alarm is a whistle.
Preferably, the power of the exhaust fan is 2000W, the direct current power supply is 12V, and the alternating current power supply is 220V.
The utility model has the beneficial effects that:
1. The smoke alarm smoke exhaust device only needs to install at least one smoke sensor in a power substation, a linkage controller, an alarm and an exhaust fan, the output end of the smoke sensor is directly connected to the input end of the linkage controller, a strong current relay and a weak current relay are arranged in the linkage controller, normally open contacts of the weak current relay are connected in a loop of the alarm, normally open contacts of the strong current relay are connected in a loop of the exhaust fan, a connecting circuit of a switch cabinet does not need to be changed, the whole device is simple in structure and convenient to install, enterprises do not need to purchase a complete fireproof system, and the original on-site exhaust fan can be adopted, so that the cost of additionally installing the smoke alarm smoke exhaust device is greatly reduced.
2. The model of the linkage controller adopted by the utility model is RS822, 1-200 smoke sensors can be connected, and the installation number of the smoke sensors is determined through the indoor space, so that indoor smoke can be timely and effectively detected.
3. The utility model adopts a 12V direct current power supply to supply power to the smoke sensor and the linkage controller, outputs and controls the 220V exhaust fan, and can ensure the safe operation of the smoke alarm and exhaust device by controlling strong electricity through weak electricity.
Drawings
Fig. 1 is a schematic diagram of an indoor smoke alarm and smoke exhaust device of a 110KV substation provided by an embodiment of the utility model;
fig. 2 is a circuit diagram of a smoke alarm and exhaust device in a 110KV substation room provided by an embodiment of the utility model;
Fig. 3 is a circuit diagram of a control circuit in a smoke alarm and exhaust device in a 110KV substation room according to an embodiment of the present utility model.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1-2, the embodiment provides an indoor smoke alarm and exhaust device of a 110KV substation, which comprises a linkage controller 10, a smoke sensor 20, an alarm 30 and an exhaust fan 40, wherein the linkage controller 10 comprises a strong current relay K1 and a weak point relay K2, a normally open contact K1-1 of the strong current relay K1 is connected in parallel between a terminal NO1 and a terminal C1 of the linkage controller 10, a normally open contact K2-1 of the weak current relay K2 is connected in parallel between a terminal NO2 and a terminal C2 of the linkage controller 10, at least one smoke sensor 20 is electrically connected with the linkage sensor 10, the alarm 30 is connected between the terminal NO2 and the terminal C2 of the linkage controller 10 after being connected in series with a direct current power supply, the exhaust fan 40 is connected between the terminal NO1 and the terminal C1 of the linkage controller 10 after being connected in series with the alternating current power supply, and the linkage controller 10 and the smoke sensor 20 are respectively connected to the direct current power supply.
The smoke alarm smoke exhaust device only needs to install at least one smoke sensor in a power substation, a linkage controller, an alarm and an exhaust fan, the output end of the smoke sensor is directly connected to the input end of the linkage controller, a strong current relay and a weak current relay are arranged in the linkage controller, the normally open contact of the weak current relay is connected in a loop of the alarm, the normally open contact of the strong current relay is connected in a loop of the exhaust fan, a 12V direct current power supply is adopted to supply power to the smoke sensor and the linkage controller, the 220V exhaust fan is output and controlled, a connecting line of a switch cabinet is not required to be changed, the whole smoke alarm smoke exhaust device is simple in structure and convenient to install, enterprises do not need to purchase a complete fireproof system, and the original exhaust fan on site can be adopted, so that the cost of additionally installing the smoke alarm smoke exhaust device is greatly reduced.
When the smoke alarm and smoke exhaust device is actually used, the installation quantity of the smoke sensors 20 is determined through an indoor space, the smoke alarm and smoke exhaust device is installed in a 110kV substation, when accidents such as cable overheat smoke ignition or switch cabinet smoke ignition occur in the substation, the smoke sensors 20 accurately detect smoke signals and immediately send input signals to the linkage controller 10, the linkage controller 10 receives the input signals of the smoke sensors 20, the strong current relay K1 and the weak current relay K2 in the linkage controller 10 instantaneously act, the normally open contact K1-1 of the strong current relay K1 and the normally open contact K2-1 of the weak current relay K2 are closed, the exhaust fan 40 and the alarm 30 are connected with a power supply, alarm and smoke exhaust work is immediately executed, and an on-duty person is notified of emergency rescue, so that the synchronous smoke exhaust can create a good environment for the first-time fault finding and the emergency treatment. When the smoke sensor 20 does not detect smoke, the input signal is stopped to be sent to the linkage controller 10, the strong current relay K1 and the weak current relay K2 of the linkage controller 10 are powered off, the alarm 30 and the exhaust fan 40 are powered off, the alarm is stopped, and the exhaust fan is automatically turned off.
Specifically, the model of the coordinated controller 10 is RS822, referring to fig. 2, the input terminal R of the coordinated controller 10 is connected to the positive electrode of the dc power supply, the input terminal B is connected to the negative electrode of the dc power supply, and the dc power supply supplies power to the coordinated controller 10.
Specifically, the coordinated controller 10 further includes a first control circuit for controlling on/off of the strong relay K1 and a second control circuit for controlling on/off of the weak relay K2, referring to fig. 3, the first control circuit and the second control circuit are the same, and described by taking the first control circuit as an example, two input terminals of the chip U1 are an input terminal Z1 and an input terminal C of the coordinated controller 10, a power VCC is connected to a first pin of the chip U1, a second pin of the chip U1 is grounded, a resistor R9 is connected in parallel with a capacitor C9 and then connected between the first pin and the second pin of the chip U1, a third pin of the chip U1 is connected with an anode of the zener diode D1, one end of the zener diode D1 is connected with one end of the resistor R4, the capacitor C5 is connected in parallel with the cathode of the diode D1, the other end of the resistor R1 is connected with the second pin of the chip U1, the other end of the diode D2 is connected with the cathode of the diode D2, the anode of the diode D3 is connected with the anode of the diode D7, the anode of the diode D7 is connected with the cathode of the diode D7, the anode of the diode D4 is connected with the other end of the cathode of the diode D4 is connected with the cathode of the diode D5, and the two ends of the diode D4 is connected with the two ends of the cathode of the diode D1 is connected with the two ends of the cathode of the diode 4, and the two-way diode 4 is connected with the two ends of the cathode 4 of the diode 2 is connected with the two ends of the cathode 4 of the cathode 2 and the cathode 2 is connected with the two-way 7 is connected with the two end of the two-way diode 2 and the cathode 1 is connected with the two-way 7.
Specifically, the model of the smoke alarm 20 is RS812A, the first input terminal of the smoke sensor 20 is connected with the positive electrode of the direct current power supply, the second input terminal is connected with the negative electrode of the direct current power supply, the direct current power supply supplies power to the smoke sensor 20, the third output terminal of the smoke sensor 20 is connected with the input terminal Z1 of the linkage controller 10, the fourth output terminal of the smoke sensor 20 is connected with the input terminal C of the linkage controller 10, the normally open contact Y1 and the normally open contact Y2 are included in the smoke sensor 20, when the smoke sensor 20 detects smoke, the normally open contacts Y1 and Y2 in the smoke sensor 20 are closed, and 18mA current signals are sent to the linkage controller 10 through the third output terminal and the fourth output terminal.
One end of the alarm 30 is connected to the output terminal C2 of the interlock controller 10, the other end is connected to the negative electrode of the dc power source, and the output terminal NO2 of the interlock controller 10 is connected to the positive electrode of the dc power source.
One end of the exhaust fan 40 is connected to the output terminal C1 of the interlock controller 10, the other end is connected to the zero line of the ac power supply, and the output terminal NO1 of the interlock controller 10 is connected to the live line of the ac power supply.
Specifically, the working voltage DC of the linkage controller 10 is 12V-24V, and the on-off of the 12V-220V relay can be controlled by a passive dry contact signal. The linkage controller 10 can also be connected with wired door magnet, wired infrared, infrared correlation and other alarm devices, and can control 220V light, alarm and other devices, so that one-to-one, many-to-one and one-to-many linkage control can be realized, smoke alarm is realized, and the linkage smoke exhaust fan is started.
Specifically, the coordinated controller 10 may be connected to 1-200 smoke sensors 20.
Specifically, the working voltage of the smoke alarm 20 is DC9V-35V, the sensitivity is 0.2db/m, the protection area is 60m 2, and the alarm output is as follows: the normally open/normally closed is optional, and the contact capacity DC28V100mA.
Specifically, the alarm 30 is a whistle, the power of the exhaust fan 40 is 2000W, the dc power supply is 12V, and the ac power supply is 220V.
Working principle: the RS812A smoke sensor is provided with a photoelectric sensor, and consists of an emitter A and a receiver B, wherein the emitter A emits a beam of light, and the beam of light is reflected by a reflecting mirror and then irradiates the receiver B. When there is no smoke, the light can be smoothly irradiated to the receiver B, and the receiver does not send any signal. But when smoke enters the inside of the smoke sensor 20, the smoke blocks the propagation of light, so that the light received by the receiver B becomes weak. When the light intensity is lower than a certain threshold value, the receiver B outputs an alarm signal, the alarm signal is transmitted to the RS812A smoke sensor through the voltage-reducing resistor and the voltage-stabilizing capacitor, the RS812A smoke sensor acquires an electrical property change signal, the normally open contacts Y1 and Y2 in the smoke sensor 20 are closed, and an 18mA signal is sent to the linkage controller 10 through the input terminals Z1 and C of the linkage controller 10.
After the linkage controller 10 receives the signal sent by the smoke sensor 20, the integrated chip U1 in the linkage controller 10 obtains the signal to send an action command signal, the command signal enables the strong current relay K1 to act in a powered mode through the control circuit, the normally open contact K1-1 of the strong current relay K1 is closed, the 220V circuit is conducted, the exhaust fan 40 is started in a powered mode, and smoke is discharged. Meanwhile, the command signal enables the weak current relay K2 to act in a power-on mode through the second control circuit, the normally open contact K2-1 of the weak current relay K2 is closed, the line of the alarm 30 is conducted, the alarm 30 is powered on, an audible and visual alarm signal is sent out, and the operator on duty is informed of emergency rescue. After the smoke sensor 20 does not detect smoke, the input signal is stopped to be sent to the linkage controller 10, the strong current relay K1 and the weak current relay K2 of the linkage controller 10 are powered off, the alarm and the exhaust fan are powered off, the alarm is stopped, and the exhaust fan is automatically turned off.
The smoke exhausting device of the smoke alarm linkage fan in the substation can realize the purposes of alarming and automatically exhausting smoke by monitoring the smoke in the switch of the substation at the first time, has a simple structure, is convenient to install and low in price, and saves hundreds of thousands of yuan for enterprises. The smoke discharging device of the smoke alarm linkage fan in the 110kV substation provides a safety net for a power supply system, so that faults can be found in advance, and a good environment is created for emergency rescue.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. An indoor smog warning fume extractor of 110KV transformer substation, its characterized in that: the intelligent smoke alarm system comprises a linkage controller (10), a smoke sensor (20), an alarm (30) and an exhaust fan (40), wherein the linkage controller (10) comprises a strong current relay K1 and a weak point relay K2, a normally open contact K1-1 of the strong current relay K1 is connected between a terminal NO1 and a terminal C1 of the linkage controller (10) in parallel, a normally open contact K2-1 of the weak current relay K2 is connected between a terminal NO2 and a terminal C2 of the linkage controller (10) in parallel, at least one smoke sensor (20) is electrically connected with the linkage controller (10), the alarm (30) is connected between a terminal NO2 and a terminal C2 of the linkage controller (10) after being connected in series with a direct current power supply, the exhaust fan (40) is connected between a terminal NO1 and a terminal C1 of the linkage controller (10) after being connected in series with the alternating current power supply, and the linkage controller (10) and the smoke sensor (20) are respectively connected to the direct current power supply.
2. The smoke alarm and exhaust apparatus in 110KV substation room according to claim 1, wherein: the model of the linkage controller (10) is RS822, the linkage controller (10) also comprises a first control circuit and a second control circuit, the first control circuit is the same as the second control circuit, two input terminals of the chip U1 are an input terminal Z1 and an input terminal C of the linkage controller (10), a power supply VCC is connected to a first pin of the chip U1, a second pin of the chip U1 is grounded, a resistor R9 is connected between the first pin and the second pin of the chip U1 after being connected in parallel with a capacitor C9, a third pin of the chip U1 is connected with an anode of a voltage stabilizing diode D1, a cathode of the voltage stabilizing diode D1 is connected with one end of the resistor R1, a capacitor C4 is connected between a cathode of the diode D1 and the second pin of the chip U1 after being connected in parallel with a capacitor C5, the other end of the resistor R1 is connected with the cathode of the diode D2, the anode of the diode D2 is connected with the cathode of the diode D3, the anode of the diode D3 is connected with the cathode of the diode D7, the anode of the diode D7 is grounded, the anode of the diode D2 is also connected with the cathode of the diode D4, the anode of the diode D4 is connected with the cathode of the diode D8, the anode of the diode D8 is grounded, one end of the resistor R6 is connected with the anode of the diode D3, the other end is connected with the cathode of the diode D7, the bidirectional voltage stabilizing diode D5 is connected with two ends of the resistor R6 in parallel, two ends of the bidirectional voltage stabilizing diode D5 are respectively used as output terminals N1 and N2 of a control circuit I, the output terminal N1 is connected with one end of the strong electric relay K1, and the output terminal N2 is connected with the other end of the strong electric relay K1.
3. The smoke alarm and exhaust apparatus in 110KV substation room according to claim 2, wherein: the type of the smoke sensor (20) is RS812A, the first input terminal of the smoke sensor (20) is connected with the positive electrode of the direct current power supply, the second input terminal is connected with the negative electrode of the direct current power supply, the third output terminal is connected with the input terminal Z1 of the linkage controller (10), and the fourth output terminal is connected with the input terminal C of the linkage controller (10).
4. A smoke alarm and extractor in a 110KV substation according to claim 3, characterized in that: one end of the alarm (30) is connected with an output terminal C2 of the linkage controller (10), the other end of the alarm is connected with a negative electrode of the direct current power supply, and an output terminal NO2 of the linkage controller (10) is connected with a positive electrode of the direct current power supply.
5. A smoke alarm and extractor in a 110KV substation according to claim 3, characterized in that: one end of the exhaust fan (40) is connected with an output terminal C1 of the linkage controller (10), the other end of the exhaust fan is connected with a zero line of an alternating current power supply, and an output terminal NO1 of the linkage controller (10) is connected with a live line of the alternating current power supply.
6. The smoke alarm and exhaust apparatus in 110KV substation room according to claim 2, wherein: an input terminal R of the linkage controller (10) is connected with the positive electrode of the direct current power supply, and an input terminal B is connected with the negative electrode of the direct current power supply.
7. The smoke alarm and exhaust apparatus in 110KV substation room according to claim 2, wherein: the linkage controller (10) is also connected with wired door magnet or wired infrared or infrared correlation alarm equipment.
8. A smoke alarm and extractor in a 110KV substation according to claim 3, characterized in that: the sensitivity of the smoke sensor (20) is 0.2db/m, and the protection area is 60m 2.
9. The smoke alarm and exhaust apparatus in 110KV substation room according to claim 4, wherein: the alarm (30) is a whistle.
10. The smoke alarm and exhaust apparatus in 110KV substation room according to claim 5, wherein: the power of the exhaust fan (40) is 2000W, the direct current power supply is 12V, and the alternating current power supply is 220V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322771847.7U CN220938854U (en) | 2023-10-16 | 2023-10-16 | Indoor smoke alarm and smoke exhaust device for 110KV substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322771847.7U CN220938854U (en) | 2023-10-16 | 2023-10-16 | Indoor smoke alarm and smoke exhaust device for 110KV substation |
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| Publication Number | Publication Date |
|---|---|
| CN220938854U true CN220938854U (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322771847.7U Active CN220938854U (en) | 2023-10-16 | 2023-10-16 | Indoor smoke alarm and smoke exhaust device for 110KV substation |
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| Country | Link |
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| CN (1) | CN220938854U (en) |
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2023
- 2023-10-16 CN CN202322771847.7U patent/CN220938854U/en active Active
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