CN108511158B - Oil recovery device and method based on oil discharge and nitrogen injection fire extinguishing linkage of oil immersed transformer - Google Patents
Oil recovery device and method based on oil discharge and nitrogen injection fire extinguishing linkage of oil immersed transformer Download PDFInfo
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- CN108511158B CN108511158B CN201810462573.4A CN201810462573A CN108511158B CN 108511158 B CN108511158 B CN 108511158B CN 201810462573 A CN201810462573 A CN 201810462573A CN 108511158 B CN108511158 B CN 108511158B
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 167
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 83
- 238000011084 recovery Methods 0.000 title claims abstract description 26
- 238000002347 injection Methods 0.000 title claims description 20
- 239000007924 injection Substances 0.000 title claims description 20
- 238000000034 method Methods 0.000 title abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 55
- 238000007599 discharging Methods 0.000 claims abstract description 20
- 238000000605 extraction Methods 0.000 claims abstract 2
- 239000007788 liquid Substances 0.000 claims description 12
- 239000011261 inert gas Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000012806 monitoring device Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 18
- 238000004891 communication Methods 0.000 description 6
- 238000004880 explosion Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002360 explosive Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/404—Protective devices specially adapted for fluid filled transformers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The utility model provides an oil recovery unit and method based on with oil-immersed transformer oil extraction annotate nitrogen fire extinguishing linkage, including case (1) that holds the cavity, oil pipe (2) that set up between case (1) and transformer oil storage cabinet, set up on oil pipe (2) and be used for taking the limiting pressure of the fluid of transformer oil storage cabinet to open as benchmark stop valve device (3), through opening of stop valve device (3), the fluid that is in high pressure in the transformer oil storage cabinet is poured into case (1) through oil pipe (2), store oil by case (1), the transformer top layer high temperature hot oil and the mixed combustible gas of no longer discharging oil annotate nitrogen fire extinguishing apparatus are collected in transformer oil tank or open container through fire control cabinet pipeline, consequently, concentrated storage and be convenient for recycle again to the fluid.
Description
Technical Field
The invention relates to an oil recovery device and method, in particular to an oil recovery device and method based on oil discharge, nitrogen injection and fire extinguishing linkage of an oil immersed transformer.
Background
The oil-immersed transformer oil-discharging nitrogen-injecting fire-extinguishing equipment is used as a transformer protection device, explosion prevention, fire prevention and fire extinguishing of the transformer are realized through oil discharging, pressure relief and nitrogen filling and cooling, and the oil-discharging nitrogen-injecting fire-extinguishing equipment is widely applied to the field of transformer fire protection, so that the oil recovery device is an important transformer component.
Based on the prior technical problems, technical characteristics and technical effects, the technical scheme of the application provided by the invention is made.
Disclosure of Invention
The invention discloses an oil recovery device based on oil discharging, nitrogen injecting and fire extinguishing linkage of an oil immersed transformer,
the invention discloses an oil recovery method based on oil discharge, nitrogen injection and fire extinguishing linkage of an oil immersed transformer.
In order to overcome the technical defects, the invention aims to provide the oil recovery device and the method based on the linkage of oil discharge, nitrogen injection and fire extinguishment of the oil immersed transformer, so that the oil is stored intensively and is convenient to recycle again.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an oil recovery device based on oil discharge, nitrogen injection and fire extinguishing linkage of an oil immersed transformer comprises a box shell with a containing cavity, an oil delivery pipe arranged between the box shell and an oil storage cabinet of the transformer, and a stop valve device arranged on the oil delivery pipe and used for opening by taking limiting pressure of oil in the oil storage cabinet of the transformer as a reference.
Because the tank shell, the oil delivery pipe and the stop valve device are designed, the high-pressure oil in the transformer oil storage cabinet is injected into the tank shell through the oil delivery pipe by opening the stop valve device, the tank shell stores the oil, and the high-temperature hot oil and the mixed combustible gas on the top layer of the transformer, which are discharged by the oil discharge nitrogen injection fire extinguishing equipment, are collected into the transformer oil tank or the open container through the fire-fighting cabinet pipeline, so that the oil is stored in a concentrated mode and is convenient to recycle again.
The invention designs that the box shell, the oil delivery pipe and the stop valve device are mutually connected in a mode of externally communicating the liquid storage space.
The invention designs a case shell which is connected with an oil delivery pipe and a stop valve device in a mode of externally communicating a closed liquid storage space.
The invention designs a transformer which also comprises a first accessory device, wherein the first accessory device is communicated with the cavity of the transformer, the first accessory device comprises a nitrogen tank and a gas pipe, and the nitrogen tank and the gas pipe are distributed in an inert gas release mode.
The invention is designed to further comprise a second accessory device which is arranged to communicate with the housing, the second accessory device being arranged as a pressure limiting valve.
The invention is designed to further comprise a third accessory device arranged to communicate with the housing, the third accessory device being arranged as a manual purge valve.
The invention also comprises a fourth accessory device which is arranged to be connected with the oil delivery pipe, and the fourth accessory device is arranged to be a manual valve.
The invention is designed to further comprise a fifth accessory device and the fifth accessory device is arranged to be coupled to the tank shell, the fifth accessory device is arranged to comprise a sump and an oil leakage sensor and the sump and the oil leakage sensor are arranged to be in a pickup pressure signal distribution.
The invention designs that the case is communicated with the transformer oil storage cabinet through an oil conveying pipe, the nitrogen tank is communicated with the transformer cavity through an air conveying pipe, a stop valve device and a manual valve are respectively arranged on the oil conveying pipe, a pressure limiting valve and a manual exhaust valve are respectively arranged on the upper end face of the case, the pressure limiting valve and the manual exhaust valve are respectively communicated with the case, an oil collecting groove is arranged in the case, and an oil leakage sensor is arranged on the oil collecting groove.
The invention designs that the case is a rectangular tank with a sealed cavity, the upper end face of the case is respectively provided with a connecting hole, the side face of the lower end face of the case is respectively provided with a connecting hole, the end head of the oil delivery pipe and the oil leakage sensor are respectively connected with the connecting holes of the side face of the lower end face of the case, and the pressure limiting valve and the manual exhaust valve are respectively connected with the connecting holes of the upper end face of the case.
The invention designs that the oil delivery pipe is a round tubular body, one end of the oil delivery pipe is connected with the case, the other end of the oil delivery pipe is connected with the end face of the bottom end of the transformer oil storage cabinet arranged on the transformer case, and the stop valve device and the manual valve are respectively connected on the oil delivery pipe in series.
The invention designs that the stop valve device is arranged as a torsion valve, a return spring is arranged between an opening and closing valve plate of the stop valve device and a shell of the stop valve device, the stop valve device is arranged to be embedded in an oil delivery pipe, and the end head of the stop valve device is arranged to be connected with the end head of the section of the oil delivery pipe through a flange plate.
The invention designs that the manual valve is arranged as a manual gate valve and is embedded in the oil delivery pipe, the end of the manual valve is connected with the end of the section of the oil delivery pipe through the flange plate, and the manual valve is arranged between the transformer oil storage tank and the stop valve device.
The invention designs that the end head of the pressure limiting valve is connected with the end face of the upper end of the case.
The invention designs that the manual exhaust valve is a manual exhaust valve and the end head of the manual exhaust valve is connected with the upper end face of the case.
According to the invention, the oil collecting groove is arranged as an annular groove, the oil collecting groove is arranged at the bottom end face part of the sealing cavity of the box shell, the oil storage port groove is arranged at the upper end face part of the oil collecting groove, the contact of the oil leakage sensor is arranged in the oil storage port groove of the oil collecting groove, and the oil storage port groove is arranged as a U-shaped groove.
The invention designs that the oil leakage sensor is arranged as an oil leakage monitoring sensor and is embedded in the box shell, and the oil leakage sensor is arranged to be connected with the transformer monitoring device.
The invention designs that the output end of the nitrogen tank is communicated with the gas pipe through the controller of the oil-immersed transformer oil-discharging and nitrogen-injecting fire extinguishing device, and the nitrogen tank is arranged as a nitrogen source of the oil-immersed transformer oil-discharging and nitrogen-injecting fire extinguishing device.
The invention designs that the gas pipe is arranged into a round tubular body, one end of the gas pipe is connected with the nitrogen tank, and the other end of the gas pipe is connected with the side face of the bottom end face of the transformer cavity.
The invention designs that the oil delivery pipe, the box shell and the stop valve device are distributed in a way of being additionally communicated with the accommodating cavity, the box shell, the pressure limiting valve and the manual exhaust valve are distributed in a way of being additionally provided with the release channel, the oil delivery pipe, the box shell and the stop valve device are distributed in a way of being additionally mixed with inert gas, the nitrogen tank and the gas delivery pipe are distributed in a way of being additionally provided with the mixed inert gas, and the box shell, the oil collecting tank and the oil leakage sensor are distributed in a way of being additionally provided with the detection point.
The invention designs an oil recovery method based on oil discharge, nitrogen injection and fire extinguishing linkage of an oil immersed transformer, which comprises the following steps:
the connection port of the gas transmission pipe and the nitrogen tank is higher than the liquid level of oil in the cavity of the transformer, the inflation pressure of the tank shell is set to be P1, the working pressure of the pressure limiting valve is set to be P2, the opening pressure of the stop valve device is set to be P3, the oil drain port pressure of the transformer oil storage tank is set to be P4, when the transformer breaks down, the pressure matching relation of P1 < P3 < P2 < P4 is met, oil in the transformer oil storage tank is discharged under the action of gravity, the manual valve and the stop valve device are passed through the oil transmission pipe, the pressure of the oil in the transformer oil storage tank is in an opening state, the opening pressure P3 of the stop valve device is overcome, meanwhile, nitrogen in the nitrogen tank of the oil-immersed transformer oil-discharging and nitrogen-filling fire extinguishing device is injected into the tank shell of the transformer through the gas transmission pipe, the pressure of the nitrogen and the oil storage tank is increased, after the nitrogen injection, the tank shell pressure is increased again, the nitrogen and flammable gas are discharged together with flammable gas, and when the pressure of the nitrogen valve is smaller than the pressure of the oil tank is closed in the stop valve P3, the tank is closed, and the tank is closed.
According to the invention, when the manual valve is closed, the oil delivery pipe is cut off, the pressure of the gas in the box shell is regulated by the manual exhaust valve, and the oil state in the oil collecting groove is picked up by the oil leakage sensor, so that the detection of the sealing performance of the box shell is realized.
The invention has the technical effects that: the oil recovery system for the oil-immersed transformer oil drainage and nitrogen injection fire extinguishing equipment consists of a transformer oil tank, an oil drainage pipeline, a nitrogen injection pipeline, a fire-fighting cabinet, an oil collecting pipe, an oil collecting tank and the like, wherein the transformer is connected with the fire-fighting cabinet through the oil drainage pipeline, the fire-fighting cabinet is connected with the oil collecting tank through the oil collecting pipe, a manual valve is connected in series between the fire-fighting cabinet and the oil collecting pipe, the overhaul and maintenance are facilitated, an oil filling port is arranged at the bottom of the oil collecting tank, a stop valve is arranged at the oil filling port, a one-way valve and a manual exhaust valve are arranged at the top of the oil filling port, the stop valve is connected with the oil collecting pipe, an opening of the stop valve faces the oil collecting tank, and transformer oil discharged from the transformer can be flushed through a valve plate of the fire-fighting cabinet and is injected into the oil collecting tank. The method is characterized in that gas with the pressure of P1kpa is injected into an oil collecting tank in a gas replacement and blowing mode, the oxygen concentration is diluted, the flame retardant effect is achieved on hot oil injected into the collecting tank, the volume of the oil collecting tank is 1.2-2 times of the oil discharging volume of a transformer, after the hot oil is discharged into the oil collecting tank, liquid oil is arranged at the bottom of a pipe body, flammable and explosive gas floats on the top of the tank due to small density, so that the oil-gas separation effect is achieved, a check valve at the top of the oil collecting tank is a mechanical valve, when fire-fighting cabinet nitrogen is injected, the combustible gas in the oil collecting tank can be blown out of the oil collecting tank, the inflation pressure of the oil collecting tank is set to be P1, the action pressure of the check valve is set to be P2, the opening pressure of a stop valve is set to be P3, and the pressure of an oil discharging port of the transformer is set to be P4, and the pressure matching relation is P1 < P3 < P2 < P4. Through original matching mode, the oil recovery system reliability of further assurance, oil collecting tank bottom is provided with oil collecting groove and oil leak sensor, and oil leak sensor can send alarm signal when oil collecting tank takes place to leak, is convenient for maintain. When the transformer fails, hot oil at the top of the transformer is discharged under the action of gravity, enters a fire cabinet pipeline through an oil discharge pipe, and is injected into an oil collecting tank through a manual valve and a stop valve. The nitrogen isolates oxygen to prevent the combustion of flammable and explosive gases. After the hot oil is injected into the collecting tank, the volume of the collecting tank is reduced, the gas pressure is increased, the one-way valve is opened for exhausting, the fire-fighting nitrogen in the fire-fighting cabinet is injected into the transformer through the nitrogen injection pipeline, and enters the collecting tank through the oil discharge pipe, the fire-fighting cabinet pipeline, the oil collecting pipe and the stop valve, and meanwhile, the hot oil of the oil collecting tank is stirred and cooled. After the fire-fighting nitrogen is injected, the pressure of the oil collecting tank is further increased, the one-way valve is continuously opened, the fire-fighting nitrogen and flammable and explosive gas are discharged out of the collecting tank together, the oil collecting tank is prevented from explosion and internal combustion, when the pressure P5 of the fire-fighting gas in the fire-fighting cabinet is smaller than the opening pressure of the stop valve P3, the stop valve is closed, the plugging oil collecting tank is used for an oil collecting system of oil discharging and nitrogen injecting fire extinguishing equipment of an oil immersed transformer, integrates the functions of oil recovery, oil-gas separation, explosion prevention and flame retardance, inflammable and explosive gas discharge and oil leakage monitoring, solves the problems of current oil discharging recovery and inflammable, and has the advantages of practical structure and environment friendliness and reliability.
In this embodiment, the shut-off valve device may also be a valve with a valve plate that can be opened by flushing.
In the technical scheme, the tank shell, the oil delivery pipe and the stop valve device which are communicated with the liquid storage space are important technical characteristics, and the oil recovery device and the oil recovery method based on the linkage of oil discharge, nitrogen injection and fire extinguishment of the oil immersed transformer are novel, creative and practical, and the terms in the technical scheme can be explained and understood by the patent literature in the technical field.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an oil recovery device based on oil discharging, nitrogen injecting and fire extinguishing linkage with an oil immersed transformer;
fig. 2 is a schematic diagram showing the connection relationship between the oil sump 9 and the oil leakage sensor 10 according to the present invention;
1-case shell, 2-oil delivery pipe, 3-stop valve device, 4-manual valve, 5-nitrogen tank, 6-gas delivery pipe, 7-pressure limiting valve, 8-manual discharge valve, 9-oil collecting tank, 10-oil leakage sensor.
Detailed Description
Terms such as "having," "including," and "comprising," as used herein, are to be construed as not being accompanied by the presence or addition of one or more other elements or combinations thereof, in accordance with the censoring guidelines.
In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate orientations or positional relationships as generally expressed, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 shows a first embodiment of the invention, which is specifically described with reference to the accompanying drawings, and comprises a case 1, an oil delivery pipe 2, a stop valve device 3, a manual valve 4, a nitrogen tank 5, a gas delivery pipe 6, a pressure limiting valve 7, a manual exhaust valve 8, an oil collecting tank 9 and an oil leakage sensor 10,
the case 1 is arranged to communicate with a transformer oil tank through an oil delivery pipe 2 and the nitrogen tank 5 is arranged to communicate with a transformer cavity through an air delivery pipe 6, a stop valve device 3 and a manual valve 4 are respectively arranged on the oil delivery pipe 2, a pressure limiting valve 7 and a manual exhaust valve 8 are respectively arranged at the upper end face part of the case 1, the pressure limiting valve 7 and the manual exhaust valve 8 are respectively arranged to communicate with the case 1, an oil collecting groove 9 is arranged in the case 1, and an oil leakage sensor 10 is arranged on the oil collecting groove 9.
In the present embodiment, the casing 1 is provided as a rectangular tank-like body having a sealed cavity and connection holes are provided respectively at the upper end face portions of the casing 1, connection holes are provided respectively at the side faces of the lower end face portions of the casing 1 and the ends of the oil delivery pipe 2 and the oil leakage sensor 10 are provided respectively to be coupled with the connection holes of the side face portions of the lower end face portions of the casing 1, and the pressure limiting valve 7 and the manual exhaust valve 8 are provided respectively to be coupled with the connection holes of the upper end face portions of the casing 1.
Through case 1, form the support tie point to defeated oil pipe 2, pressure limiting valve 7, manual discharge valve 8 and oil leak sensor 10, by case 1, realized being connected with defeated oil pipe 2, realized being connected with pressure limiting valve 7, realized being connected with manual discharge valve 8, realized being connected with oil leak sensor 10.
In the present embodiment, the oil delivery pipe 2 is provided as a circular tubular body and one end of the oil delivery pipe 2 is provided to be coupled with the tank case 1, the other end of the oil delivery pipe 2 is provided to be coupled with a bottom end face portion of a transformer tank provided on the transformer case, and the shutoff valve device 3 and the manual valve 4 are provided in series on the oil delivery pipe 2, respectively.
Through oil pipe 2, form the support tie point to case 1, stop valve device 3 and manual valve 4, by oil pipe 2, realized being connected with case 1, realized being connected with stop valve device 3, realized being connected with manual valve 4, realized the intercommunication of transformer oil storage cabinet and case 1.
In the present embodiment, the shut-off valve device 3 is provided as a torsion valve and a return spring is provided between the opening and closing valve plate of the shut-off valve device 3 and the housing of the shut-off valve device 3, the shut-off valve device 3 is provided to be embedded in the oil pipe 2 and the end of the shut-off valve device 3 is provided to be coupled with the cross-sectional end of the oil pipe 2 through a flange.
Through the stop valve device 3, a supporting connection point for the oil delivery pipe 2 is formed, the connection with the oil delivery pipe 2 is realized by the stop valve device 3, and the communication between the transformer oil storage cabinet and the case 1 is realized under the state of high-pressure oil.
In the present embodiment, the manual valve 4 is provided as a manual gate valve and the manual valve 4 is provided as a mosaic in the oil delivery pipe 2, the end of the manual valve 4 is provided as a connection with the cross-sectional end of the oil delivery pipe 2 through a flange plate and the manual valve 4 is provided between the transformer tank and the shut-off valve device 3.
The supporting connection point of the oil delivery pipe 2 is formed through the manual valve 4, the connection with the oil delivery pipe 2 is realized through the manual valve 4, and the opening and closing control of the transformer oil storage cabinet and the case 1 is realized.
In the present embodiment, the tip of the pressure limiting valve 7 is provided to be coupled with the upper end face portion of the case 1.
The pressure limiting valve 7 forms a supporting connection point for the case 1, and the pressure limiting valve 7 realizes the connection with the case 1 and the release and discharge of the high-pressure mixed gas in the case 1.
In the present embodiment, the manual air release valve 8 is provided as a manual air release valve and the tip of the manual air release valve 8 is provided to be coupled with the upper end face portion of the case 1.
The manual exhaust valve 8 forms a supporting connection point for the case 1, and the manual exhaust valve 8 realizes connection with the case 1 and release and discharge of mixed gas in the case 1.
In the present embodiment, the oil sump 9 is provided as an annular groove-like body and the oil sump 9 is provided at the bottom end face portion of the seal cavity of the tank case 1, the oil storage port groove 91 is provided at the upper end face portion of the oil sump 9 and the contact of the oil leakage sensor 10 is provided in the oil storage port groove 91 of the oil sump 9, and the oil storage port groove 91 is provided as a U-shaped groove.
The oil sump 9 forms a supporting connection point for the casing 1 and the oil leakage sensor 10, and the oil sump 9 realizes connection with the casing 1 and the oil storage port 91 realizes connection with the oil leakage sensor 10.
In the present embodiment, the oil leakage sensor 10 is provided as an oil leakage monitoring sensor and the oil leakage sensor 10 is provided as a mosaic in the case 1, the oil leakage sensor 10 being provided in connection with the transformer monitoring device.
The oil leakage sensor 10 forms a supporting connection point for the tank shell 1 and the oil collecting groove 9, and the oil leakage sensor 10 realizes the connection with the tank shell 1 and the oil collecting groove 9.
In the embodiment, the output end of the nitrogen tank 5 is communicated with the gas pipe 6 through a controller of the oil-immersed transformer oil-discharging and nitrogen-injecting fire extinguishing device, and the nitrogen tank 5 is arranged as a nitrogen source of the oil-immersed transformer oil-discharging and nitrogen-injecting fire extinguishing device.
Through nitrogen tank 5, form the support tie point to gas-supply pipe 6, by nitrogen tank 5, realized being connected with gas-supply pipe 6, realized the connection to the injection nitrogen gas of transformer cavity.
In the present embodiment, the gas pipe 6 is provided as a circular tubular body and one end of the gas pipe 6 is provided to be coupled with the nitrogen tank 5, and the other end of the gas pipe 6 is provided to be coupled with a side face of the bottom end face portion of the transformer cavity.
Through gas-supply pipe 6, form the support tie point to nitrogen jar 5, by gas-supply pipe 6, realized the connection with nitrogen jar 5, realized the injection nitrogen gas to the transformer cavity.
In the present embodiment, the oil delivery pipe 2 and the casing 1 and the shutoff valve device 3 are arranged so as to be attached to the communication accommodating chamber and the casing 1 and the pressure limiting valve 7 and the manual air release valve 8 are arranged so as to be attached to the release passage, the oil delivery pipe 2, the casing 1 and the shutoff valve device 3 are arranged so as to be attached to the mixed inert gas and the nitrogen tank 5 and the gas delivery pipe 6, and the casing 1 and the oil sump 9 and the oil leakage sensor 10 are arranged so as to be attached to the detection point.
In a second embodiment of the invention, the tank shell 1, the oil delivery pipe 2 and the shut-off valve device 3 are connected to each other in such a way that they communicate with the liquid storage space.
In this embodiment, the tank housing 1 is connected to the oil line 2 and the shut-off valve device 3 in such a way that it communicates with the closed liquid storage space.
In the present embodiment, a first accessory device is further included and is provided in communication with the transformer cavity, the first accessory device is provided to include the nitrogen tank 5 and the gas pipe 6, and the nitrogen tank 5 and the gas pipe 6 are provided in an inert gas release distribution.
In the present embodiment, a second accessory device is also included and provided in communication with the tank case 1, the second accessory device being provided as the pressure limiting valve 7.
In the present embodiment, a third accessory device is also included and is provided in communication with the case 1, the third accessory device being provided as a manual purge valve 8.
In this embodiment, a fourth accessory device is also included and is arranged to be coupled to the oil delivery pipe 2, the fourth accessory device being arranged as a manual valve 4.
In the present embodiment, a fifth accessory device is further included and is provided to be coupled with the tank case 1, the fifth accessory device is provided to include the oil sump 9 and the oil leakage sensor 10, and the oil sump 9 and the oil leakage sensor 10 are provided in a pickup pressure signal distribution.
The second embodiment of the present invention is based on the first embodiment.
The invention will be further described with reference to the following examples, which are intended to illustrate the invention and not to limit it further.
An oil recovery method based on linkage of oil discharge, nitrogen injection and fire extinguishment of an oil immersed transformer comprises the following steps:
the connection port of the gas pipe 6 and the nitrogen tank 5 is higher than the liquid level of oil in the cavity of the transformer, the inflation pressure of the tank 1 is set to be P1, the working pressure of the pressure limiting valve 7 is set to be P2, the opening pressure of the stop valve device 3 is set to be P3, the oil drain port pressure of the transformer oil tank is set to be P4, when the transformer breaks down, the pressure matching relation of P1 < P3 < P2 < P4 is met, oil in the transformer oil tank is drained under the action of gravity, the oil passes through the manual valve 4 and the stop valve device 3 through the oil pipe 2, the pressure of the oil in the transformer oil tank overcomes the opening pressure 3 of the stop valve device 3 and is injected into the tank 1, meanwhile, nitrogen in the nitrogen tank 5 of the oil-draining and nitrogen-extinguishing device of the transformer is injected into the cavity of the transformer through the gas pipe 6, the gas pressure in the tank 7 rises, the tank 1 begins to work, the pressure of the tank 1 rises again after the nitrogen is injected, the pressure of the tank 1 rises, the pressure of the nitrogen is discharged by the pressure limiting valve 7 and the nitrogen tank 3 is closed together with the pressure of the nitrogen tank 3 when the pressure is closed in the tank 3, and the pressure of the nitrogen tank is closed in the tank 3 is closed.
In this embodiment, when the manual valve 4 is closed, the oil delivery pipe 2 is cut off, the pressure of the internal gas of the casing 1 is regulated by the manual exhaust valve 8, and the oil state in the oil collecting tank 9 is picked up by the oil leakage sensor 10, so that the detection of the sealing performance of the casing 1 is realized.
When the invention is verified, the technical basis of the invention is that the vacuum state of the cavity of the transformer is maintained, so that the reliability of the transformer is improved, inert gas is injected into the transformer and the case 1 through the nitrogen tank 5 and the gas pipe 6, the explosion of high-temperature hot oil of the transformer is prevented, and the safety performance of the transformer is improved.
The invention has the following characteristics:
1. because the case 1, the oil delivery pipe 2 and the stop valve device 3 are designed, the high-pressure oil in the transformer oil storage cabinet is injected into the case 1 through the oil delivery pipe 2 by opening the stop valve device 3, the case 1 stores the oil, and the high-temperature hot oil and the mixed combustible gas on the top layer of the transformer, which are discharged by the oil discharge nitrogen injection fire extinguishing equipment, are collected into a transformer oil tank or an open container through a fire-fighting cabinet pipeline, so that the oil is concentrated to be stored and is convenient to recycle again.
2. Due to the design of the nitrogen tank 5 and the gas pipe 6, the risk of oil combustion is reduced through the temperature reduction of the nitrogen to the oil and the mixing of the nitrogen and the gas.
3. By designing the pressure limiting valve 7, the risk of high pressure explosion of the tank shell 1 is reduced by releasing the gas inside the tank shell 1.
4. Due to the design of the oil collecting groove 9 and the oil leakage sensor 10, the on-line detection of the tightness of the box shell 1 is realized.
5. Due to the design of the manual valve 4 and the manual exhaust valve 8, the maintenance of the tank shell 1, the oil delivery pipe 2 and the stop valve device 3 is facilitated through the manual valve 4, and the maintenance of the tank shell 1, the oil collecting tank 9 and the oil leakage sensor 10 is facilitated through the manual exhaust valve 8.
6. Because the technical characteristics of the invention are designed, the experiment shows that the performance indexes of the invention are at least 1.7 times of the existing performance indexes under the independent and mutually aggregated functions of the technical characteristics, and the invention has good market value through evaluation.
Other technical features of the case 1, the oil delivery pipe 2 and the shut-off valve device 3, which are connected to the external fluid storage space, are one of the embodiments of the present invention, and the technical features of the above-described embodiments may be arbitrarily combined, and in order to meet the requirements of patent laws, patent implementation details and examination guidelines, all possible combinations of the technical features of the above-described embodiments will not be described.
The above embodiment is only one implementation form of the oil recovery device and method based on the oil discharging, nitrogen injecting and fire extinguishing linkage of the oil immersed transformer, and according to other variants of the scheme provided by the invention, components or steps in the oil recovery device and method are added or reduced, or the oil recovery device and method are applied to other technical fields close to the oil immersed transformer, and all belong to the protection scope of the invention.
Claims (4)
1. Oil recovery unit based on with oil immersed transformer oil extraction annotate nitrogen and put out a fire linkage, characterized by: comprises a case (1) with a containing cavity, an oil delivery pipe (2) arranged between the case (1) and a transformer oil storage cabinet, and a stop valve device (3) arranged on the oil delivery pipe (2) and used for opening based on the limiting pressure of oil in the transformer oil storage cabinet,
the device also comprises a first accessory device which is communicated with the cavity of the transformer, the first accessory device comprises a nitrogen tank (5) and a gas pipe (6), the nitrogen tank (5) and the gas pipe (6) are distributed in an inert gas release way,
a second accessory device is also included and is arranged to be communicated with the case (1), the second accessory device is arranged as a pressure limiting valve (7),
a third accessory device is also included and is arranged to be communicated with the case (1), the third accessory device is arranged to be a manual exhaust valve (8),
a fourth accessory device is also included and is arranged to be connected with the oil delivery pipe (2), the fourth accessory device is arranged to be a manual valve (4),
a fifth accessory device is also included and is arranged to be coupled with the tank shell (1), the fifth accessory device is arranged to include a sump (9) and an oil leakage sensor (10) and the sump (9) and the oil leakage sensor (10) are arranged to be distributed in a pickup pressure signal,
the case (1) is communicated with the transformer oil storage cabinet through the oil delivery pipe (2) and the nitrogen tank (5) is communicated with the transformer cavity through the gas delivery pipe (6), the oil delivery pipe (2) is respectively provided with a stop valve device (3) and a manual valve (4) and a pressure limiting valve (7) and a manual exhaust valve (8) are arranged at the upper end face part of the case (1), the pressure limiting valve (7) and the manual exhaust valve (8) are respectively communicated with the case (1), an oil collecting groove (9) is arranged in the case (1) and an oil leakage sensor (10) is arranged on the oil collecting groove (9),
the case (1) is a rectangular tank with a sealed cavity, the upper end face of the case (1) is respectively provided with a connecting hole, the side face of the lower end face of the case (1) is respectively provided with a connecting hole, the end of the oil delivery pipe (2) and the oil leakage sensor (10) are respectively connected with the connecting holes of the side face of the lower end face of the case (1), the pressure limiting valve (7) and the manual exhaust valve (8) are respectively connected with the connecting holes of the upper end face of the case (1),
the oil delivery pipe (2) is a round tubular body, one end of the oil delivery pipe (2) is connected with the case (1), the other end of the oil delivery pipe (2) is connected with the bottom end face of the transformer oil storage cabinet arranged on the transformer shell, the stop valve device (3) and the manual valve (4) are respectively connected on the oil delivery pipe (2) in series,
the stop valve device (3) is provided with a torsion valve, a return spring is arranged between an opening and closing valve plate of the stop valve device (3) and a shell of the stop valve device (3), the stop valve device (3) is embedded in the oil delivery pipe (2) and the end head of the stop valve device (3) is connected with the end head of the section of the oil delivery pipe (2) through a flange plate,
the manual valve (4) is a manual gate valve, the manual valve (4) is embedded in the oil delivery pipe (2), the end of the manual valve (4) is connected with the end of the section of the oil delivery pipe (2) through a flange plate, the manual valve (4) is arranged between the transformer oil storage tank and the stop valve device (3),
the end of the pressure limiting valve (7) is connected with the end face of the upper end of the case (1),
the manual exhaust valve (8) is a manual exhaust valve, the end head of the manual exhaust valve (8) is connected with the upper end face of the case (1),
the oil collecting groove (9) is arranged as an annular groove-shaped body, the oil collecting groove (9) is arranged at the bottom end face part of the sealing cavity of the box shell (1), the oil storage port groove (91) is arranged at the upper end face part of the oil collecting groove (9), the contact of the oil leakage sensor (10) is arranged in the oil storage port groove (91) of the oil collecting groove (9), the oil storage port groove (91) is arranged as a U-shaped groove,
the oil leakage sensor (10) is arranged as an oil leakage monitoring sensor, the oil leakage sensor (10) is arranged to be embedded in the box shell (1), the oil leakage sensor (10) is arranged to be connected with the transformer monitoring device,
the output end of the nitrogen tank (5) is communicated with the gas transmission pipe (6) through a controller of the oil-immersed transformer oil-discharging and nitrogen-injecting fire extinguishing device, the nitrogen tank (5) is a nitrogen source of the oil-immersed transformer oil-discharging and nitrogen-injecting fire extinguishing device,
the gas pipe (6) is a round tubular body, one end of the gas pipe (6) is connected with the nitrogen tank (5), the other end of the gas pipe (6) is connected with the side surface of the bottom end surface part of the transformer cavity,
the connection port of the gas transmission pipe (6) and the nitrogen tank (5) is higher than the liquid level of oil in the cavity of the transformer, the inflation pressure of the tank shell (1) is set to be P1, the working pressure of the pressure limiting valve (7) is set to be P2, the opening pressure of the oil tank (5) of the oil-discharging and nitrogen-extinguishing device of the transformer is set to be P3, the oil outlet pressure of the oil tank of the transformer is P4 when the transformer breaks down, the pressure matching relation of P1 < P3 < P2 < P4 is met, the oil in the oil tank of the transformer is discharged due to the action of gravity, the oil transmission pipe (2) passes through the manual valve (4) and the pressure limiting valve (3), the pressure of the oil in the oil tank of the transformer is overcome to be in the opening state of the manual valve (4), the nitrogen in the nitrogen tank (5) is simultaneously injected into the tank shell (1) through the pipe (6), the nitrogen in the oil tank of the oil-discharging and nitrogen-extinguishing device of the transformer is injected into the tank shell (1), the pressure of the tank (1) is increased by the pressure limiting valve (7) after the oil tank (1) is increased, the pressure of the oil tank (3) is increased, the oil tank (3) is blocked and the pressure is blocked when the pressure of the oil tank (3) is increased,
when the manual valve (4) is closed, the oil delivery pipe (2) is cut off, the pressure of the internal gas of the box shell (1) is regulated by the manual exhaust valve (8), and the oil liquid state in the oil collecting groove (9) is picked up by the oil leakage sensor (10), so that the detection of the sealing performance of the box shell (1) is realized.
2. The oil recovery device based on the linkage of oil discharge, nitrogen injection and fire extinguishment of the oil immersed transformer according to claim 1, which is characterized in that: the tank shell (1), the oil delivery pipe (2) and the stop valve device (3) are mutually connected in a mode of externally communicating the liquid storage space.
3. The oil recovery device based on the linkage of oil discharge, nitrogen injection and fire extinguishment of the oil immersed transformer according to claim 2, which is characterized in that: the tank shell (1) is connected with the oil delivery pipe (2) and the stop valve device (3) in a mode of communicating the sealed liquid storage space.
4. The oil recovery device based on the linkage of oil discharge, nitrogen injection and fire extinguishment of the oil immersed transformer according to claim 1, which is characterized in that: the oil delivery pipe (2) is distributed with the case (1) and the stop valve device (3) in a mode of being attached with the communicating accommodating cavity, the case (1) is distributed with the pressure limiting valve (7) and the manual exhaust valve (8) in a mode of being attached with the releasing channel, the oil delivery pipe (2), the case (1) and the stop valve device (3) are distributed with the nitrogen tank (5) and the gas delivery pipe (6) in a mode of being attached with the mixed inert gas, and the case (1) is distributed with the oil collecting groove (9) and the oil leakage sensor (10) in a mode of being attached with the detecting point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810462573.4A CN108511158B (en) | 2018-05-15 | 2018-05-15 | Oil recovery device and method based on oil discharge and nitrogen injection fire extinguishing linkage of oil immersed transformer |
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| CN201810462573.4A CN108511158B (en) | 2018-05-15 | 2018-05-15 | Oil recovery device and method based on oil discharge and nitrogen injection fire extinguishing linkage of oil immersed transformer |
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| CN109411203A (en) * | 2018-12-24 | 2019-03-01 | 江苏天威变压器有限公司 | Fuel-saving type oil-immersed transformer |
| CN111013053B (en) * | 2019-12-25 | 2021-04-16 | 南京溧水高新创业投资管理有限公司 | Oil-immersed transformer fire-fighting cabinet capable of recycling oil |
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