CN111514505B - A dampproofing, prevent foreign matter device for oil removal annotates nitrogen fire extinguishing systems - Google Patents
A dampproofing, prevent foreign matter device for oil removal annotates nitrogen fire extinguishing systems Download PDFInfo
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- CN111514505B CN111514505B CN202010534304.1A CN202010534304A CN111514505B CN 111514505 B CN111514505 B CN 111514505B CN 202010534304 A CN202010534304 A CN 202010534304A CN 111514505 B CN111514505 B CN 111514505B
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- foreign matter
- oil
- matter detection
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- nitrogen
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims description 42
- 229910052757 nitrogen Inorganic materials 0.000 title claims description 21
- 238000001514 detection method Methods 0.000 claims abstract description 48
- 238000007599 discharging Methods 0.000 claims abstract description 19
- 230000000007 visual effect Effects 0.000 claims abstract description 11
- 230000000903 blocking effect Effects 0.000 claims abstract description 3
- 230000008054 signal transmission Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000001960 triggered effect Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 230000001629 suppression Effects 0.000 claims 7
- 239000007789 gas Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire Alarms (AREA)
Abstract
The invention discloses a moistureproof and foreign matter-proof device for an oil-discharging and nitrogen-injecting fire extinguishing system, belongs to the technical field of transformer fire protection, and relates to a device with an anti-fog and foreign matter-entering and alarm function for an oil-discharging and nitrogen-injecting fire extinguishing system. Comprises an anti-fog film cover foreign matter detection unit and a linkage alarm unit; the anti-fog film cover foreign matter detection unit comprises an anti-fog film cover, a bracket and a foreign matter detection device; the anti-fog film sleeve is in a flat-bottom bowl shape, a cross pre-opening valve is arranged in the middle of the anti-fog film sleeve, and the edge of the cross pre-opening valve is thick and thin in the middle and is used for blocking foreign matters from entering; the support is a flat plate-shaped support, and the foreign matter detection equipment is arranged in the middle of the support; the foreign matter detection device is connected with the linkage alarm unit through a wire, and the linkage alarm unit receives a foreign matter detection device signal and sends out an audible and visual alarm signal. The device has reasonable structure, is convenient to be additionally arranged on the existing oil-discharging nitrogen-injecting fire extinguishing device, and does not need to be greatly changed. The function expansibility is strong, and the alarm information can be timely and effectively processed.
Description
Technical Field
The invention discloses a moistureproof and foreign matter-proof device for an oil-discharging and nitrogen-injecting fire extinguishing system, belongs to the technical field of transformer fire protection, and relates to a device with an anti-fog and foreign matter-entering and alarm function for an oil-discharging and nitrogen-injecting fire extinguishing system.
Background
When the transformer fails, a large amount of combustible gas is generated in the oil tank, so that the gas relay acts, a heavy gas signal is sent out, and the circuit breaker trips; the internal faults of the transformer cause the oil temperature to rise at the same time, and a temperature-sensing fire detector arranged on the transformer acts to send a fire alarm signal to a fire control cabinet. After receiving the fire alarm signal, the heavy gas signal and the tripping signal of the circuit breaker, the fire control center starts an oil discharging and nitrogen injecting system, discharges oil and discharges pressure, and prevents the explosion of the transformer; simultaneously, the stop valve under the oil storage cabinet is closed automatically, and the oil storage cabinet is cut off to supply oil to the transformer oil tank, and the oil level of the transformer oil tank is reduced. After a certain time delay (generally 3s to 20 s), the nitrogen release valve is opened, nitrogen is injected from the bottom of the transformer tank body through the nitrogen injection pipe, the transformer oil is stirred and cooled, and air is isolated, so that the purposes of fire prevention and extinguishment are achieved.
The common oil-discharging nitrogen-injecting fire extinguishing system is a fire extinguishing system which is provided with an automatic detection transformer fire disaster, can be started automatically (or manually), controls an oil discharging valve to open a discharging part of transformer oil to discharge oil and discharge pressure, effectively cuts off an oil way from an oil storage cabinet to an oil tank through a stop valve and controls a nitrogen release valve to open a fire extinguishing system for injecting nitrogen into the transformer. The system is generally composed of a fire control cabinet, a stop valve, a fire detection device, an oil discharge pipeline, a nitrogen injection pipeline and the like.
In use, it is found that at the joint of the oil drain pipeline and the accident oil pool, moisture, dust, small organisms and the like in the accident oil pool can invade the blocking pipeline, so that the valve is corroded, the oil drain pipeline cannot drain oil normally, and larger accidents are caused.
Disclosure of Invention
The invention aims to provide a moistureproof and foreign matter-proof device for an oil-discharging and nitrogen-injecting fire extinguishing system, which can prevent foreign matters at the tail end interface of an oil-discharging pipe of the oil-discharging and nitrogen-injecting fire extinguishing device from entering and has an alarm output function.
The invention is realized by adopting the following technical scheme:
a dampproof and foreign matter preventing device for an oil-discharging and nitrogen-injecting fire extinguishing system comprises a fog-proof film cover foreign matter detecting unit and a linkage alarm unit; the anti-fog film cover foreign matter detection unit comprises an anti-fog film cover, a bracket and a foreign matter detection device; the anti-fog film sleeve is in a flat bowl shape, a cross pre-opening valve is arranged in the middle of the anti-fog film sleeve, and the edge of the cross pre-opening valve is thick and thin in the middle, so that foreign matters can be prevented from entering the anti-fog film sleeve; the support is a flat plate-shaped support, and the foreign matter detection equipment is arranged in the middle of the support; the foreign matter detection device is connected with the linkage alarm unit through a wire, and the linkage alarm unit receives a foreign matter detection device signal and sends out an audible and visual alarm signal which can be remotely transmitted to the alarm control center and the linkage terminal according to the requirement.
The antifogging film is sleeved on the port of the oil drain pipe in a flat mode and covers the port of the oil drain pipe; the periphery of the antifogging film sleeve is fixed on the wall of the oil drain pipe through screws or other forms of fasteners; the bracket is fixed on the inner wall of the rear part of the oil discharge pipe port through a screw, and the foreign matter detection equipment is arranged on the bracket; the cross pre-opening valve in the middle of the antifogging film sleeve is connected with foreign matter detection equipment; when foreign matters enter, the cross pre-opening valve is triggered, and foreign matter detection equipment arranged above the cross pre-opening valve is triggered to output a foreign matter entering alarm signal.
The anti-fog film sleeve is made of oil-resistant corrosion-resistant flexible materials, and the pre-opening valve has proper bonding strength through experiments, so that fog and foreign matters can be effectively prevented from entering.
The foreign matter detection equipment comprises a foreign matter sensing part and a linkage signal transmission part, the foreign matter detection equipment is provided with a box body, the foreign matter sensing part is arranged outside the box body, and the linkage signal transmission part is arranged in the box body; the foreign matter sensing part is connected with a cross pre-opening valve at the middle part of the anti-fog film sleeve; when foreign matters exist, the linkage signal transmission component is triggered, so that the linkage alarm unit is connected to alarm.
The foreign matter sensing part comprises a proximity switch and a deflector rod, the head end of the deflector rod is connected with a cross pre-opening valve in the middle of the anti-fog film sleeve, and the tail end of the deflector rod is arranged on the box body of the foreign matter detection device; the proximity switch is arranged in the middle of the box body of the foreign matter detection device and is contacted with the deflector rod; the deflector rod is made of flexible strip-shaped materials; the proximity switch adopts a double-contact switch; the linkage signal transmission component is arranged in the box body and comprises a first contact and a second contact of the double-contact switch; the first contact and the second contact are connected in parallel; when the cross pre-opening valve is broken due to foreign matters, the proximity switch is pressed down by the deflector rod, so that the linkage circuit is conducted, the first contact and the second contact are closed, and the linkage alarm unit connected with the linkage signal transmission part is connected, so that an audible and visual alarm signal is sent. The alarm signal can be transmitted to the alarm control center and the linkage terminal remotely, so that real-time and online monitoring is realized.
The linkage alarm unit is arranged in a control cabinet of the oil and nitrogen discharging device, adopts a PLC controller or an analog control circuit and is provided with an audible and visual alarm element. In order to expand the use, the system also comprises a signal remote transmission component and a wireless terminal component, wherein the signal remote transmission component can be a commercially available data remote transmission module; the wireless terminal component is a handset, a tablet computer, a mobile phone or a Pad with a wireless communication function.
Working principle: this device is at ordinary times, prevents through antifog membrane cover that the foreign matter from getting into oil pipe, in case there is the foreign matter to get into, can break through antifog membrane cover cross pre-opening to trigger foreign matter check out test set, foreign matter check out test set output switching value alarm signal, pass to the linkage alarm unit of oil drainage annotate nitrogen extinguishing device, send out audible and visual alarm.
The invention has the advantages that:
the device can prevent foreign matters from entering, if the foreign matters enter, alarm signals are timely output, and the operation stability and the safety of the oil-discharging and nitrogen-injecting fire extinguishing device are improved. The device has reasonable structure, is convenient to be additionally arranged on the existing oil-discharging and nitrogen-injecting fire extinguishing device, and does not need to be greatly changed. The system has strong function expansibility, can be connected with an alarm control center, sends the monitored alarm information to the alarm control center, and records the monitored alarm information through the alarm control center so as to perform later unified management, maintenance and analysis, and can be displayed on a linkage terminal in real time to timely inform responsible and maintenance personnel to timely and effectively process the alarm information.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of the structure of the device of the present invention (installed in an oil sump);
FIG. 2 is a top view of the device of the present invention in use;
FIG. 3 is a side view 1 of the device of the present invention in use;
FIG. 4 is a side view of the device of the present invention in use 2;
FIG. 5 is a top view of the anti-fog film sleeve of the present invention;
FIG. 6 is a schematic view of a foreign matter detection device of the apparatus of the present invention;
FIG. 7 is a schematic circuit diagram of a linked alarm unit of the device of the present invention;
fig. 8 is a functional block diagram of the device of the present invention.
In the figure:
1. the anti-fog film comprises an anti-fog film sleeve, a cross pre-opening valve, a support, 3, foreign matter detection equipment, 3-1, a proximity switch, 3-2, a deflector rod, 4, a linkage alarm unit, 5, an oil drain pipe, K1, a first contact, K2, a second contact, an LED, an alarm lamp, SP and a loudspeaker.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 8 and the specific embodiments.
Referring to fig. 1 to 8, a moistureproof and anti-foreign matter device for an oil-discharging and nitrogen-injecting fire extinguishing system comprises an anti-fog film cover foreign matter detection unit and a linkage alarm unit 4; the anti-fog film cover foreign matter detection unit comprises an anti-fog film cover 1, a bracket 2 and a foreign matter detection device 3; the anti-fog film sleeve 1 is in a flat-bottom bowl shape, the middle part of the anti-fog film sleeve 1 is provided with a cross pre-opening valve 1-1, and the edge of the cross pre-opening valve 1-1 is thick and thin in the middle, so that foreign matters can be prevented from entering; the bracket 2 is a flat plate-shaped bracket, and the foreign matter detection equipment 3 is arranged in the middle of the bracket 2; the foreign matter detection device 3 is connected with the linkage alarm unit 4 through a wire, and the linkage alarm unit 4 receives a signal of the foreign matter detection device 3 and gives out an audible and visual alarm and can be remotely transmitted to an alarm control center and a linkage terminal according to the requirement.
The antifogging film sleeve 1 is sleeved on the port of the oil drain pipe 5 in a flat way and covers the port of the oil drain pipe 5; the periphery of the antifogging film sleeve 1 is fixed on the wall of the oil drain pipe through screws or other forms of fasteners; the bracket 2 is fixed on the inner wall of the rear part of the oil discharge pipe port through screws, and the foreign matter detection equipment 3 is arranged on the bracket 2; the cross pre-opening valve 1-1 in the middle of the anti-fog film sleeve 1 is connected with a foreign matter detection device 3; when foreign matters enter, the cross pre-opening valve 1-1 is triggered, and the foreign matter detection device 3 arranged above the cross pre-opening valve 1-1 is triggered to output a foreign matter entering alarm signal.
The anti-fog film sleeve 1 is made of oil-resistant corrosion-resistant flexible materials, and the cross pre-opening valve 1-1 has proper bonding strength through experiments, so that fog and foreign matters can be effectively prevented from entering.
The foreign matter detection device 3 comprises a foreign matter sensing part and a linkage signal transmission part, the foreign matter detection device 3 is provided with a box body, the foreign matter sensing part is arranged outside the box body, and the linkage signal transmission part is arranged in the box body; the foreign matter sensing part is connected with a cross pre-opening valve 1-1 in the middle of the antifogging film sleeve; when foreign matters exist, the linkage signal transmission component is triggered, so that the linkage alarm unit 4 is connected to alarm.
The foreign matter sensing component comprises a proximity switch 3-1 and a deflector rod 3-2, wherein the head end of the deflector rod 3-2 is connected with a cross pre-opening valve 1-1 in the middle of the anti-fog film sleeve 1, and the tail end of the deflector rod 3-2 is arranged on a box body of the foreign matter detection device 3; the proximity switch 3-1 is arranged in the middle of the box body of the foreign matter detection device 3 and is contacted with the deflector rod 3-2; the deflector rod 3-2 is made of flexible strip-shaped material; the proximity switch 3-1 adopts a double-contact switch; the linkage signal transmission component is arranged in the box body and comprises a first contact K1 and a second contact K2 of the double-contact switch; the first contact K1 and the second contact K2 are connected in parallel; when the antifogging film cover 1 is broken or a rubber cross pre-opening valve 1-1 is touched by foreign matters, the proximity switch 3-1 is pressed down by the deflector rod 3-2, so that a linkage circuit is conducted, the first contact K1 and the second contact K2 are closed, and a linkage alarm unit 4 connected with a linkage signal transmission part is connected, so that an audible and visual alarm signal is sent. The alarm signal can be transmitted to an alarm control center and a linkage terminal remotely, so that real-time and online monitoring is realized.
In this embodiment, the linkage alarm unit 4 is installed in the control cabinet of the oil drainage and nitrogen injection device, and the linkage alarm unit 4 adopts a PLC controller or an analog control circuit and is provided with an audible and visual alarm element, wherein an alarm lamp LED is used as a luminous alarm, and a loudspeaker SP is used as an audible alarm. In order to expand the use, the system also comprises a signal remote transmission component and a wireless terminal component, wherein the signal remote transmission component can be a commercially available data remote transmission module; the wireless terminal component (i.e. the linkage terminal) is a handset, a tablet computer, a mobile phone or a Pad with wireless communication function.
The device has reasonable structure, is convenient to be additionally arranged on the existing oil-discharging nitrogen-injecting fire extinguishing device, and does not need to be greatly changed. The system has strong function expansibility, can be connected with a remote control center, sends the monitored alarm information to the alarm control center, and records the monitored alarm information through the alarm control center so as to perform later unified management, maintenance and analysis, and can be displayed on a linkage terminal in real time to timely inform responsible and maintenance personnel to timely and effectively process the alarm information.
Claims (8)
1. A dampproofing foreign matter device that prevents that is used for oil drainage annotates nitrogen fire extinguishing systems, its characterized in that: comprises an anti-fog film cover foreign matter detection unit and a linkage alarm unit; the anti-fog film cover foreign matter detection unit comprises an anti-fog film cover, a bracket and a foreign matter detection device; the anti-fog film sleeve is in a flat-bottom bowl shape, a cross pre-opening valve is arranged in the middle of the anti-fog film sleeve, and the edge of the cross pre-opening valve is thick and thin in the middle and is used for blocking foreign matters from entering; the support is a flat plate-shaped support, and the foreign matter detection equipment is arranged in the middle of the support; the foreign matter detection device is connected with the linkage alarm unit through a wire, and the linkage alarm unit receives a foreign matter detection device signal and sends out an audible and visual alarm signal;
the antifogging film is sleeved on the port of the oil drain pipe in a flat mode and covers the port of the oil drain pipe; the periphery of the antifogging film sleeve is fixed on the wall of the oil drain pipe through a fastener; the bracket is fixed on the inner wall of the rear part of the oil discharge pipe port through a screw, and the foreign matter detection equipment is arranged on the bracket; the cross pre-opening valve in the middle of the antifogging film sleeve is connected with foreign matter detection equipment; when foreign matters enter, the cross pre-opening valve is triggered, and foreign matter detection equipment arranged above the cross pre-opening valve is triggered to output a foreign matter entering alarm signal.
2. A moisture and foreign object resistant device for an oil and nitrogen evacuation fire suppression system as recited in claim 1 wherein: the linkage alarm unit is respectively connected with the alarm control center and the linkage terminal.
3. A moisture and foreign object resistant device for an oil and nitrogen evacuation fire suppression system as recited in claim 2 wherein: the device also comprises a signal remote transmission component and a wireless terminal component; the signal remote transmission component is a data remote transmission module; the wireless terminal component is a handset, a tablet computer, a mobile phone or a Pad with a wireless communication function.
4. A moisture and foreign object resistant device for an oil and nitrogen evacuation fire suppression system as recited in claim 1 wherein: the fastener is a screw.
5. A moisture and foreign object resistant device for an oil and nitrogen evacuation fire suppression system as recited in claim 1 wherein: the anti-fog film sleeve is made of oil-resistant corrosion-resistant flexible materials.
6. A moisture and foreign object resistant device for an oil and nitrogen evacuation fire suppression system as recited in claim 1 wherein: the foreign matter detection equipment comprises a foreign matter sensing part and a linkage signal transmission part, the foreign matter detection equipment is provided with a box body, the foreign matter sensing part is arranged outside the box body, and the linkage signal transmission part is arranged in the box body; the foreign matter sensing part is connected with a cross pre-opening valve at the middle part of the anti-fog film sleeve.
7. The moisture and foreign object resistant apparatus for an oil and nitrogen evacuation fire suppression system of claim 6, wherein: the foreign matter sensing part comprises a proximity switch and a deflector rod, the head end of the deflector rod is connected with a cross pre-opening valve in the middle of the anti-fog film sleeve, and the tail end of the deflector rod is arranged on a box body of the foreign matter detection device; the proximity switch is arranged in the middle of the box body of the foreign matter detection device and is contacted with the deflector rod; the deflector rod is made of flexible strip-shaped materials; the proximity switch adopts a double-contact switch; the linkage signal transmission component is arranged in the box body and comprises a first contact and a second contact of the double-contact switch; the first contact and the second contact are connected in parallel; when the cross pre-opening valve is broken due to foreign matters, the proximity switch is pressed down by the deflector rod, so that the linkage circuit is conducted, the first contact and the second contact are closed, and the linkage alarm unit connected with the linkage signal transmission part is connected, so that an audible and visual alarm signal is sent.
8. The moisture and foreign object resistant apparatus for an oil and nitrogen evacuation fire suppression system of claim 7, wherein: the linkage alarm unit is arranged in a control cabinet of the oil and nitrogen discharging device, adopts a PLC controller or an analog control circuit and is provided with an audible and visual alarm element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010534304.1A CN111514505B (en) | 2020-06-12 | 2020-06-12 | A dampproofing, prevent foreign matter device for oil removal annotates nitrogen fire extinguishing systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010534304.1A CN111514505B (en) | 2020-06-12 | 2020-06-12 | A dampproofing, prevent foreign matter device for oil removal annotates nitrogen fire extinguishing systems |
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| Publication Number | Publication Date |
|---|---|
| CN111514505A CN111514505A (en) | 2020-08-11 |
| CN111514505B true CN111514505B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010534304.1A Active CN111514505B (en) | 2020-06-12 | 2020-06-12 | A dampproofing, prevent foreign matter device for oil removal annotates nitrogen fire extinguishing systems |
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| CN (1) | CN111514505B (en) |
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| KR20000016475U (en) * | 1999-02-02 | 2000-09-25 | 에릭 발리베 | Drain apparatus of start motor |
| KR20110009341A (en) * | 2009-07-22 | 2011-01-28 | 빈기찬 | Apparatus for drainage and method manufacturing the same |
| CN107806362A (en) * | 2017-10-19 | 2018-03-16 | 力帆实业(集团)股份有限公司 | Automobile exhaust pipe with foreign bodies detection function |
| CN207141398U (en) * | 2017-07-31 | 2018-03-27 | 西北工业大学 | Air bags control assembly |
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| CN208105451U (en) * | 2018-04-17 | 2018-11-16 | 董金凯 | A kind of spiral Pedals type floor drain device of anti-blocking |
| CN212327282U (en) * | 2020-06-12 | 2021-01-12 | 国网江苏省电力有限公司宿迁供电分公司 | Moisture-proof and foreign matter-proof device for oil-discharging and nitrogen-injecting fire extinguishing system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808213A (en) * | 2015-05-11 | 2015-07-29 | 合肥京东方光电科技有限公司 | Foreign matter detecting device and coating system |
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2020
- 2020-06-12 CN CN202010534304.1A patent/CN111514505B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06118010A (en) * | 1992-10-05 | 1994-04-28 | Seiko Epson Corp | Foreign matter inspection device and pellicle |
| JPH08278294A (en) * | 1995-04-10 | 1996-10-22 | Mitsubishi Paper Mills Ltd | Foreign matter detecting method |
| KR20000016475U (en) * | 1999-02-02 | 2000-09-25 | 에릭 발리베 | Drain apparatus of start motor |
| KR20110009341A (en) * | 2009-07-22 | 2011-01-28 | 빈기찬 | Apparatus for drainage and method manufacturing the same |
| CN207141398U (en) * | 2017-07-31 | 2018-03-27 | 西北工业大学 | Air bags control assembly |
| CN107806362A (en) * | 2017-10-19 | 2018-03-16 | 力帆实业(集团)股份有限公司 | Automobile exhaust pipe with foreign bodies detection function |
| CN108154507A (en) * | 2017-12-29 | 2018-06-12 | 长春师范大学 | Screwed pipe foreign matter detection system |
| CN208105451U (en) * | 2018-04-17 | 2018-11-16 | 董金凯 | A kind of spiral Pedals type floor drain device of anti-blocking |
| CN212327282U (en) * | 2020-06-12 | 2021-01-12 | 国网江苏省电力有限公司宿迁供电分公司 | Moisture-proof and foreign matter-proof device for oil-discharging and nitrogen-injecting fire extinguishing system |
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| CN111514505A (en) | 2020-08-11 |
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Effective date of registration: 20240305 Address after: 223800 no.2481, Fazhan Avenue, Suqian City, Jiangsu Province Applicant after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. SUQIAN POWER SUPPLY BRANCH Country or region after: China Applicant after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. Applicant after: STATE GRID CORPORATION OF CHINA Applicant after: SUQIAN ELECTRIC POWER DESIGN INSTITUTE Co.,Ltd. Address before: 223800 no.2481 Fazhan Avenue, Sucheng District, Suqian City, Jiangsu Province Applicant before: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. SUQIAN POWER SUPPLY BRANCH Country or region before: China Applicant before: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. Applicant before: STATE GRID CORPORATION OF CHINA |
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