CN116565737A - Normal-pressure sealed environment-friendly ring main unit, heat dissipation method and detection method - Google Patents
Normal-pressure sealed environment-friendly ring main unit, heat dissipation method and detection method Download PDFInfo
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- CN116565737A CN116565737A CN202310843768.4A CN202310843768A CN116565737A CN 116565737 A CN116565737 A CN 116565737A CN 202310843768 A CN202310843768 A CN 202310843768A CN 116565737 A CN116565737 A CN 116565737A
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 30
- 238000001514 detection method Methods 0.000 title abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 82
- 230000007246 mechanism Effects 0.000 claims abstract description 80
- 239000012530 fluid Substances 0.000 claims abstract description 54
- 239000007788 liquid Substances 0.000 claims description 62
- 238000010992 reflux Methods 0.000 claims description 57
- 239000000110 cooling liquid Substances 0.000 claims description 39
- 238000007789 sealing Methods 0.000 claims description 27
- 230000003068 static effect Effects 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 18
- 230000000712 assembly Effects 0.000 claims description 17
- 238000000429 assembly Methods 0.000 claims description 17
- 239000012809 cooling fluid Substances 0.000 claims description 15
- 230000006870 function Effects 0.000 claims description 11
- 238000004880 explosion Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
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- 230000002093 peripheral effect Effects 0.000 claims description 6
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- 238000012423 maintenance Methods 0.000 claims description 5
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- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 229910052573 porcelain Inorganic materials 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims 2
- 238000000605 extraction Methods 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
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- 238000012549 training Methods 0.000 description 3
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- 230000005684 electric field Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- ORILYTVJVMAKLC-UHFFFAOYSA-N Adamantane Natural products C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0354—Gas-insulated switchgear comprising a vacuum switch
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/045—Details of casing, e.g. gas tightness
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Abstract
The invention provides a normal-pressure sealed environment-friendly ring main unit, a heat dissipation method and a detection method, and relates to the technical field of ring main units and heat dissipation, wherein the normal-pressure sealed environment-friendly ring main unit comprises a water-cooling heat exchange structure fixed in a protection cabinet body, and an air guide structure is arranged between the water-cooling heat exchange structure and a supporting structure; the bottom of the inner side of the water-cooling heat exchange structure is connected with a circulating cooling pipeline, a refrigerating fluid storage mechanism is installed at the bottom of the center of the protection cabinet body, and a circulating cooling mechanism is installed between the refrigerating fluid storage mechanism and the circulating cooling pipeline. Through design water-cooling heat exchange structure, wind-guiding structure, circulation cooling pipeline, refrigerating fluid backward flow mechanism, circulation cooling mechanism and refrigerating fluid storage mechanism, can carry out inner loop heat dissipation cooling to the electrical equipment in the looped netowrk cabinet, not contact with outside air, effectively avoided inhaling the condition of dust and moist steam in the outside air, can not cause electrical equipment's circuit short circuit, advance greatly reduced the potential safety hazard.
Description
Technical Field
The invention relates to the technical field of ring main units, in particular to a normal-pressure sealed environment-friendly ring main unit, a heat dissipation method and a detection method.
Background
The ring network refers to a ring-shaped distribution network, namely, a power supply main line forms a closed ring shape, a power supply supplies power to the ring-shaped main line, the power is distributed outwards from the main line through a high-voltage switch on the other path, the ring network cabinet is a group of high-voltage switch equipment which is arranged in a steel plate metal cabinet body or is made into electric equipment of an assembled interval ring network power supply unit, and the core part of the ring network cabinet adopts a load switch and a fuse, so that the ring network has the advantages of simple structure, small volume, low price, capability of improving power supply parameters and performance, power supply safety and the like.
The high-power electric equipment is arranged in the ring main unit, a large amount of heat can be generated when the high-power electric equipment continuously works, a heat dissipating device is arranged in many ring main units at present, most of heat dissipating devices are designed by adopting an air-cooled heat dissipating structure, and the heat dissipating device can play a role in heat dissipation and temperature reduction, but also has a certain problem in the actual use process, and when the heat dissipating fan works, a large amount of outside air can be sucked, and the outside air usually contains a certain amount of dust and moist vapor, so that the long-time continuous accumulation is carried out, the condition that the electric equipment is short-circuited in a circuit is easily caused, and further, the great potential safety hazard exists.
Therefore, a new normal-pressure sealed environment-friendly ring main unit, a heat dissipation method and a detection method are developed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the normal-pressure sealed environment-friendly ring main unit, the heat dissipation method and the detection method, and solves the problems that most of the existing heat dissipation devices adopt an air-cooled heat dissipation structure design, and have a certain problem in the actual use process although the heat dissipation and the temperature reduction can be achieved, a large amount of outside air can be sucked in when the heat dissipation fan works, and the outside air usually contains certain dust and moist vapor, and is accumulated continuously for a long time, so that the condition of short circuit of electrical equipment is easily caused, and further the potential safety hazard is high.
The invention is realized by adopting the following technical scheme: the normal pressure sealing environment-friendly ring main unit comprises a protection cabinet body, a ring main unit body and a water-cooling heat exchange structure fixed in the protection cabinet body, wherein a supporting structure is fixedly connected to the bottom of the inner side of the water-cooling heat exchange structure, and an air guide structure is arranged at the lower end of the supporting structure;
the bottom of the inner side of the water-cooling heat exchange structure is connected with a circulating cooling pipeline, and the rear end of the water-cooling heat exchange structure is fixedly connected with a refrigerating fluid reflux mechanism;
The bottom of the center of the protection cabinet body is provided with a refrigerating fluid storage mechanism, and a circulating cooling mechanism is arranged between the refrigerating fluid storage mechanism and a circulating cooling pipeline.
The ring main unit body comprises a cable chamber, a cable chamber panel is arranged on the right side of the cable chamber, the cable chamber is arranged at the bottom of the ring main unit, and a pressure release chamber is arranged on the left side inside the cable chamber;
the mechanism chamber is used for controlling the opening and closing actions of the ring main unit, a mechanism chamber panel is arranged on the right side of the mechanism chamber, and the mechanism chamber is arranged at the upper end of the right side of the cable chamber and fixedly connected with the cable chamber;
the core unit air box is arranged on the left side of the mechanism chamber, the right side of the core unit air box is fixedly connected with the mechanism chamber, the lower end of the core unit air box is fixed on the upper left end of the cable chamber, and a lower three-station switch is arranged in the core unit air box;
the instrument box is internally provided with a plurality of instruments for monitoring data in the ring main unit, the right side of the instrument box is provided with an instrument box panel, and the instrument box is fixed at the upper end of the mechanism room;
the instrument box panel, the mechanism room panel and the cable room panel are positioned on the same vertical plane.
Preferably, the lower three-position switch comprises an outer frame, the outer frame comprises lower three-position switch brackets, two lower three-position switch brackets are arranged, and the two lower three-position switch brackets are oppositely arranged left and right;
the two connecting plates are arranged between the front side and the rear side of the lower three-position switch bracket, and are in clamping connection with the lower three-position switch bracket;
the two insulating clamping plates are arranged, the two insulating clamping plates are arranged on the front surface and the rear surface of the upper part of the lower three-position switch bracket, and the insulating clamping plates are fixedly connected with the lower three-position switch bracket through bolts;
the switch fixing plate is arranged on the left side of the insulating clamping plate and is fixedly connected with the insulating clamping plate through bolts;
the connecting plate, the insulating clamping plate and the lower three-station switch are combined into an outer frame;
arc extinguishing chamber components are symmetrically arranged between the insulating clamping plates, and one end of each arc extinguishing chamber component extends out of the insulating clamping plates and is fixedly connected with the insulating clamping plates;
the switch fixing plate is provided with a hexagonal main shaft, the hexagonal main shaft is provided with a shielding cover assembly, one end of the hexagonal main shaft is fixed on the switch fixing plate, and the other end of the hexagonal main shaft extends between the insulating clamping plates and is in rotary connection with the arc extinguishing chamber assembly;
And an isolating switch main shaft is arranged in the space between the lower three-station switch brackets, and two ends of the isolating switch main shaft are propped against the lower three-station switch brackets.
Preferably, three arc extinguishing chamber assemblies are arranged, the arc extinguishing chamber assemblies are axially equidistantly arranged, and the number of the shielding cover assemblies is consistent with that of the arc extinguishing chamber assemblies;
the arc extinguishing chamber assembly comprises a cam bracket, wherein the cam bracket is arranged on a hexagonal main shaft in a penetrating way, and the hexagonal main shaft can freely rotate on the cam bracket;
the cam is arranged on the cam bracket, can rotate on the cam bracket and is provided with an L-shaped groove;
the contact pressure spring is provided with a sliding block at the top, the sliding block is arranged on the L-shaped groove of the cam, and the contact pressure spring is connected with the cam through the sliding block;
the soft connection is arranged at the bottom of the contact pressure spring and is fixedly connected with the contact pressure spring, and a connecting rod is arranged at the bottom of the soft connection;
the vacuum arc-extinguishing chamber is arranged at the lower end of the flexible connection, a connecting rod is arranged at the top of the vacuum arc-extinguishing chamber, the connecting rod at the bottom of the flexible connection is fixedly connected with the connecting rod at the top of the vacuum arc-extinguishing chamber, and an arc-extinguishing chamber supporting plate is arranged on the peripheral wall of the vacuum arc-extinguishing chamber;
The bottom of vacuum interrupter is equipped with the explosion chamber fixing base, explosion chamber fixing base passes through bolt and vacuum interrupter fixed connection.
Preferably, the vacuum arc-extinguishing chamber comprises a shell, wherein the shell comprises a movable cover plate, a static cover plate and a ceramic shell, and the movable cover plate, the static cover plate and the ceramic shell are sequentially and fixedly connected to form the shell;
the top of the shell is provided with a guide sleeve which is embedded at the upper end of the movable cover plate, and a movable conducting rod is arranged in the guide sleeve in a penetrating way;
the bottom of the movable conducting rod is provided with a movable contact, the lower end of the movable conducting rod is provided with a static conducting rod, the top end of the static conducting rod is provided with a static contact, and the movable contact and the outside of the static contact are sleeved with a shielding cylinder;
the periphery of the upper half part of the movable conducting rod is provided with a corrugated pipe, the corrugated pipe is sleeved on the movable conducting rod, and the lower end of the corrugated pipe is provided with a corrugated pipe shielding cover.
Preferably, a dynamic seal is arranged on the outer wall of the connection between the isolating switch main shaft and the right lower three-station switch bracket.
Preferably, the lower end of the insulation clamping plate is provided with a plurality of groups of equalizing ring assemblies, the equalizing ring assemblies are fixed on the insulation clamping plate, and the number of the equalizing ring assemblies is consistent with that of the arc extinguishing chamber assemblies.
Preferably, the protection cabinet body comprises a cabinet body, one side of cabinet body front end rotates and is connected with the cabinet door, the top fixedly connected with waterproof canopy of the cabinet body, the bottom fixedly connected with work box of the cabinet body, sealed apron is installed to the rear end of work box, the bottom fixedly connected with support base of work box.
Through above-mentioned technical scheme, whole independently heat abstractor installs and fixes in the protection cabinet body, and the looped netowrk cabinet body is also installed in the protection cabinet body simultaneously to be located independently heat abstractor inboard.
Preferably, the water-cooling heat exchange structure comprises an inner heat exchange frame, an outer heat exchange frame is arranged on the outer side of the inner heat exchange frame, a top sealing plate is fixedly connected to the top of the inner heat exchange frame, a top sealing cover connected with the outer heat exchange frame is fixedly connected to the top of the top sealing plate, a flow distribution cavity is arranged between the top sealing plate and the top sealing cover, and a flow guide heat exchange gap is arranged between the inner heat exchange frame and the outer heat exchange frame.
Through above-mentioned technical scheme, all be equipped with the cavity in interior heat exchange frame and the outer heat exchange frame, the coolant liquid can pour into in the cavity of interior heat exchange frame and the outer heat exchange frame, make the water conservancy diversion heat transfer clearance between whole interior heat exchange frame and the outer heat exchange frame form low temperature environment, after the hot air is by leading into the reposition of redundant personnel chamber in, the hot air can be along the downward flow in-process in water conservancy diversion heat transfer clearance, can fast cooling when this in-process when the hot air contacts interior heat exchange frame and the outer heat exchange frame of low temperature, and the heat in the air can be conducted to the coolant liquid of inside flow through interior heat exchange frame and outer heat exchange frame, when waiting the air flow to the bottom between interior heat exchange frame and the outer heat exchange frame, the hot air is accomplished the heat exchange, form the cold air.
Preferably, the support structure comprises a support plate, the support plate is fixed at the bottom of the inner wall of the inner heat exchange frame, and a fixing plate is fixedly connected between the front end of the support plate and the outer heat exchange frame.
Through above-mentioned technical scheme, the backup pad can play support and installation fixed action to wind-guiding structure and electrical equipment.
Preferably, the air guiding structure comprises a lower circulating fan and an upper circulating fan, the lower circulating fan is fixedly arranged at the bottom center of the supporting plate, the upper circulating fan is fixedly arranged at the bottom center of the top sealing plate, and the centers of the supporting plate and the top sealing plate are provided with ventilation holes.
Through the technical scheme, cold air can be blown out upwards when the lower circulating fan works, so that cooling and heat dissipation of electrical equipment in the ring main unit are realized, negative pressure suction force can be generated when the upper circulating fan is started, hot air in the ring main unit body is sucked into the diversion cavity, and heat exchange of subsequent hot air is facilitated.
Preferably, the circulating cooling pipeline comprises a liquid supply tank and a plurality of second shunt pipes, the liquid supply tank is fixed at the bottom of the inner heat exchange frame, the two sides and the rear end of the inner wall of the liquid supply tank are fixedly connected with first shunt pipes, a plurality of first four-way valves are arranged between the first shunt pipes, the two sides and the rear end of the inner wall of the outer heat exchange frame are fixedly connected with second shunt pipes, a plurality of second four-way valves are arranged between the second shunt pipes, the front end of the first four-way valve is connected with a first connecting pipe, the front end of the second four-way valve is connected with a second connecting pipe, a first three-way valve is arranged between the first connecting pipe and the second connecting pipe, and the bottom end of the first three-way valve is fixedly connected with the liquid supply pipe.
Through the technical scheme, the circulating cooling pipeline is used for connecting the circulating cooling mechanism with the water-cooling heat exchange structure, after the circulating pump is started, low-temperature cooling liquid in the liquid supply tank can be pumped into the liquid supply pipe, the low-temperature cooling liquid enters the first three-way valve through the liquid supply pipe, then enters the first four-way valve and the second four-way valve through the first connecting pipe and the second connecting pipe respectively, and respectively enters the inner bottoms of the inner heat exchange frame and the outer heat exchange frame through the first shunt pipes and the second shunt pipes respectively, so that the cooling liquid flows upwards from the bottoms of the cavities of the inner heat exchange frame and the outer heat exchange frame, and the cooling liquid is circulated by matching the refrigerating liquid backflow mechanism and the refrigerating liquid storage mechanism.
Preferably, the refrigerating fluid reflux mechanism comprises a first reflux pipe and a second reflux pipe, a second three-way valve is arranged between the first reflux pipe and the second reflux pipe, and the bottom end of the second three-way valve is connected with a main reflux pipe.
Through the technical scheme, through holes are formed in the tops of the rear ends of the inner heat exchange frame and the outer heat exchange frame and are communicated with the first return pipe and the second return pipe respectively, so that the cooling liquid after heat exchange can flow into the second three-way valve through the first return pipe and the second return pipe, then enters the main return pipe through the second three-way valve, and finally flows back into the return tank through the main return pipe.
Preferably, the refrigerating fluid storage mechanism comprises a fluid supply tank and a reflux tank, a micro refrigerator is arranged between the fluid supply tank and the reflux tank, the bottom end of the main reflux pipe is communicated with the reflux tank, a micro fluid pump and a refrigerating module are arranged in the micro refrigerator, and one end of the micro fluid pump is connected with the reflux tank.
Through the technical scheme, the other end of the miniature liquid pump is connected with the refrigerating module, the outlet end of the refrigerating module is connected with the liquid supply box, cooling liquid is stored in the liquid supply box and the reflux box, the reflux box is used for storing the cooling liquid after temperature rise, the miniature liquid pump can pump the cooling liquid after temperature rise in the reflux box through a pipeline, then the cooling liquid is sent into the refrigerating module for rapid cooling, and the cooling liquid after cooling flows back to the liquid supply box through the outlet end of the refrigerating module so as to realize circulating cooling.
Preferably, the circulating cooling mechanism comprises a supporting seat, the supporting seat is fixed at the center of the inner surface of the bottom of the working box, a supporting frame is fixedly connected to the top of the supporting seat, a circulating pump is mounted on the supporting frame, a water outlet of the circulating pump is connected with a liquid supply pipe, a liquid suction pipe is fixedly connected to a water suction port of the circulating pump, and the other end of the liquid suction pipe is connected with the liquid supply box.
Through the technical scheme, after the circulating pump is started, the circulating pump can pump the low-temperature cooling liquid in the liquid supply tank into the liquid supply pipe so as to continuously supply the low-temperature cooling liquid into the inner heat exchange frame and the outer heat exchange frame.
A heat dissipation method of a normal pressure sealed environment-friendly ring main unit comprises the following specific steps:
step one: when the electrical equipment in the ring main unit works for a long time to emit a large amount of heat, the air guide structure, the refrigerating fluid storage mechanism and the circulating cooling mechanism are started, the lower circulating fan blows cold air to the electrical equipment in the ring main unit to cool and dissipate heat, the upper circulating fan can generate negative pressure suction, and hot air in the ring main unit is sucked into the diversion cavity;
step two: after the hot air enters the diversion cavity, the hot air enters the diversion heat exchange gap through the peripheral side of the bottom of the diversion cavity, and then the hot air flows downwards along the diversion heat exchange gap;
step three: because the inner heat exchange frame and the outer heat exchange frame are communicated with the circulating cooling liquid, heat exchange can be realized in the process that hot air flows downwards along the diversion heat exchange gaps, the temperature of the hot air can be quickly reduced when the hot air contacts the inner heat exchange frame and the outer heat exchange frame with low temperature, and the heat in the air can be conducted into the cooling liquid flowing inside through the inner heat exchange frame and the outer heat exchange frame;
Step four: when the air flows to the bottom end between the inner heat exchange frame and the outer heat exchange frame, the hot air completes heat exchange to form cold air, and the cold air is sucked by a lower circulating fan and blown upwards to realize the circulating heat dissipation and cooling of the electrical equipment;
step five: in the working process of the air guide structure, the refrigerating fluid storage mechanism and the circulating cooling mechanism are synchronously operated, the circulating pump pumps the low-temperature cooling fluid in the fluid supply box into the fluid supply pipe, the low-temperature cooling fluid enters the first three-way valve through the fluid supply pipe, then enters the first four-way valve and the second four-way valve through the first connecting pipe and the second connecting pipe respectively, and respectively enters the inner bottoms of the inner heat exchange frame and the outer heat exchange frame through the first shunt pipes and the second shunt pipes respectively, so that the cooling fluid flows upwards from the bottoms of the cavities of the inner heat exchange frame and the outer heat exchange frame;
step six: the heat-exchanged cooling liquid flows into the second three-way valve through the first return pipe and the second return pipe, then enters the main return pipe through the second three-way valve, and finally flows back into the return tank through the main return pipe;
step seven: the cooling liquid after the temperature rise is stored in the reflux box, a micro refrigerator is arranged between the liquid supply box and the reflux box, a micro liquid pump and a refrigerating module are arranged in the micro refrigerator, the micro liquid pump can pump the cooling liquid after the temperature rise in the reflux box through a pipeline, then the cooling liquid is sent into the refrigerating module for rapid cooling, and the cooling liquid after cooling flows back to the liquid supply box through an outlet end of the refrigerating module so as to realize circulating cooling.
A detection method of an atmospheric pressure sealed environment-friendly ring main unit comprises the following specific steps:
step A: starting an intelligent self-checking system; the system consists of a CPU or a MCU and a set of matched sensors, and after the system is electrified, the self-checking system is started through a software command or a physical switch;
and (B) step (B): collecting operation data of equipment in the box body;
the process of collecting data typically involves a variety of sensors that can monitor and record the operating state of the device in real time; these sensors include a current sensor, a temperature sensor, and a vibration sensor, the current sensor can monitor the current condition of the device, the temperature sensor can monitor the temperature of the device, and the vibration sensor can detect whether an abnormal vibration exists in the device;
step C: analyzing the operation data, judging the working condition of the equipment, and realizing a predictive maintenance function; after collecting the equipment operation data, the central processing unit operates a preset algorithm for analysis;
step D: if an abnormality or potential problem is found in the device, a report is generated and an alarm is raised.
Analyzing operation data in the third step, namely predicting possible faults of equipment based on historical operation data of the equipment by utilizing a Long Short-Term Memory (LSTM) network learning algorithm, and maintaining in advance to avoid shutdown or damage of the equipment;
In LSTM, including gate, forget gate for gate, input gate and output gate, which together control the flow of information in LSTM cell;
the basic formula and structure of LSTM is as follows:
first, there is a forget gate f_t:
f_t = σ(W_f • [h_(t-1), x_t] + b_f)
where σ is a sigmoid function, h_ (t-1) is the hidden state of the last time step, x_ t is the input of the current time step, W_ f is the weight matrix of the forgetting gate, and b_ f is the bias term of the forgetting gate;
second, input gate i_t and candidate cell state
Then, there is an input gate i_t and candidate cell state
Wherein w_i, b_i, w_c, and b_c are weight matrices and bias terms for the respective gates and states;
next, there is an update cell state c_t:
finally, there is an output gate o_t and a hidden state h_t:
o_t = σ(W_o • [h_(t-1), x_t] + b_o)
h_t = o_t * tanh(C_t)
wherein W_o and b_o are the weight matrix and bias terms of the output gates;
wherein, input x: the operation data collected from the internal equipment of the ring main unit comprises parameters such as current, voltage, temperature, vibration and the like;
output y: is the operating state of the device.
Compared with the prior art, the invention has the following beneficial effects:
1. this closed looped netowrk cabinet is heat abstractor independently through design water-cooling heat transfer structure, wind-guiding structure, circulation cooling pipeline, refrigerating fluid backward flow mechanism, circulation cooling mechanism and refrigerating fluid storage mechanism, can carry out inner loop heat dissipation cooling to the electrical equipment in the looped netowrk cabinet, does not contact with outside air, has effectively avoided inhaling the condition of dust and moist steam in the outside air, can not cause electrical equipment's circuit short circuit, advance greatly reduced the potential safety hazard.
2. According to the closed type ring main unit autonomous heat dissipation device, by adopting an inner circulation heat dissipation structure, high-efficiency heat dissipation and cooling can be realized for electrical equipment, and meanwhile, through designing a slit type heat exchange channel, hot air in a cabinet can be quickly exchanged, so that continuous and stable heat dissipation and cooling are ensured, and the working efficiency is greatly improved;
3. the integrated lower three-station switch is arranged, so that the cost is reduced, the size of an operating mechanism is reduced, the installation and the use in the ring main unit body are more convenient, and the running stability and the running safety of the high-voltage power distribution system are improved due to the compact internal structure and the integrated design; in the breaker switch, a hexagonal main shaft is arranged on a switch fixing plate, a shielding cover component is arranged on the hexagonal main shaft, one end of the hexagonal main shaft is fixed on the switch fixing plate, the other end of the hexagonal main shaft extends to the space between the insulating clamping plates and is rotationally connected with the arc extinguishing chamber component to achieve an insulating effect, and the shielding piece is made of aluminum alloy, so that the shielding effect is good and the heat dissipation function is strong; the inside between the lower three-station switch brackets is also provided with a disconnecting switch main shaft, two ends of the disconnecting switch main shaft are propped against the lower three-station switch brackets, and the outer wall of the disconnecting switch main shaft connected with the right lower three-station switch bracket is provided with a dynamic seal;
4. The detection system is arranged, the internal data of the ring main unit can be monitored and analyzed in real time after the detection system is started, the data is analyzed by utilizing an algorithm built in the detection system, the abnormality or potential problem of equipment can be rapidly judged, a detailed report can be generated by the central processing unit, operators can be helped to find the problem in time, overhaul and maintenance operations are carried out, and the working efficiency is greatly improved.
Drawings
FIG. 1 is a first view angle structure diagram of an autonomous heat dissipating apparatus according to the present invention;
FIG. 2 is a view of a second view of the self-heat dissipating device according to the present invention;
FIG. 3 is a view of a third view of the self-heat dissipating device according to the present invention;
FIG. 4 is a schematic view of an air guiding structure according to the present invention;
FIG. 5 is a front view of the water-cooled heat exchange structure of the present invention;
FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;
FIG. 7 is a side view of a water-cooled heat exchange structure of the present invention;
FIG. 8 is a cross-sectional view taken along B-B in FIG. 7;
FIG. 9 is a schematic diagram of a mechanism for refluxing a refrigerant fluid in accordance with the present invention;
FIG. 10 is an enlarged view of a portion of FIG. 9 at A;
FIG. 11 is a partial enlarged view at B in FIG. 9;
FIG. 12 is an enlarged view of a portion of FIG. 6 at C;
FIG. 13 is a partial enlarged view at D in FIG. 6;
FIG. 14 is a first view angle block diagram of the protective cabinet body of the present invention;
FIG. 15 is a second view angle block diagram of the protective cabinet body of the present invention;
FIG. 16 is a front view of the protective cabinet body of the present invention;
fig. 17 is a schematic structural diagram of a ring main unit body according to the present invention;
FIG. 18 is a schematic diagram of a three-position switch according to the present invention;
fig. 19 is a schematic view of an arc chute assembly according to the present invention;
FIG. 20 is a schematic diagram of the front structure of the lower three-position switch of the present invention;
fig. 21 is a schematic view showing the internal structure of the vacuum interrupter according to the present invention.
In the figure: 1. a protective cabinet body; 101. a cabinet body; 102. a cabinet door; 103. waterproof canopy; 104. a working box; 105. sealing the cover plate; 106. a support base; 2. a water-cooling heat exchange structure; 201. an inner heat exchange frame; 202. an outer heat exchange frame; 203. a top sealing plate; 204. a top seal cap; 205. a shunt cavity; 206. a diversion heat exchange gap; 3. a support structure; 301. a support plate; 302. a fixing plate; 4. an air guiding structure; 401. a lower circulation fan; 402. an upper circulation fan; 5. a circulating cooling pipeline; 501. a liquid supply tank; 502. a first shunt; 503. a first four-way valve; 504. a second shunt tube; 505. a second four-way valve; 506. a first connection pipe; 507. a second connection pipe; 508. a first three-way valve; 509. a liquid supply pipe; 6. a refrigerating fluid reflux mechanism; 601. a first return pipe; 602. a second return pipe; 603. a second three-way valve; 604. a main return pipe; 7. a refrigerating fluid storage mechanism; 701. a liquid supply tank; 702. a reflow box; 703. a micro refrigerator; 8. a circulating cooling mechanism; 801. a support base; 802. a support frame; 803. a circulation pump; 804. a pipette; 9. a ring main unit body; 901. an instrument box; 902. an instrument box panel; 903. a mechanism chamber panel; 904. a mechanism chamber; 905. a cable compartment panel; 906. a cable chamber; 907. a pressure relief chamber; 908. a core unit air box; 1a, a shielding cover assembly; 2a, hexagonal spindle; 3a, a switch fixing plate; 4a, arc extinguishing chamber components; 41a, cam brackets; 42a, contact pressure springs; 43a, arc extinguishing chamber fixing seat; 44a, vacuum interrupter; 441a, a movable conductive rod; 4411a, a moving contact; 4412a, a connecting rod; 442a, guide sleeve; 443a, movable cover plate; 444a, bellows shield; 445a, shielding cylinder; 446a, static conductive rod; 4461a, stationary contact; 447a, static cover plate; 448a, porcelain shell; 449a, bellows; 45a, arc extinguishing chamber supporting plates; 46a, soft connection; 47a, cams; 5a, isolating switch main shaft; 6a, insulating splints; 7a, a lower three-station switch bracket; 71a, dynamic sealing; 8a, equalizing ring components; 9a, connecting plates.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
Examples:
as shown in fig. 1-21, the embodiment of the invention provides a normal pressure sealed environment-friendly ring main unit, which comprises a protection cabinet body 1, a ring main unit body 9 and a water-cooling heat exchange structure 2 fixed in the protection cabinet body 1, wherein the protection cabinet body 1 comprises a cabinet body 101, one side of the front end of the cabinet body 101 is rotationally connected with a cabinet door 102, the top of the cabinet body 101 is fixedly connected with a waterproof canopy 103, the bottom of the cabinet body 101 is fixedly connected with a working box 104, the rear end of the working box 104 is provided with a sealing cover plate 105, the bottom of the working box 104 is fixedly connected with a supporting base 106, the whole autonomous heat dissipation device is installed and fixed in the protection cabinet body 1, and meanwhile, the ring main unit body 9 is also installed in the protection cabinet body 1 and positioned inside the autonomous heat dissipation device;
the ring main unit body 9 comprises a cable chamber 906, a cable chamber panel 905 is arranged on the right side of the cable chamber 906, the cable chamber 906 is arranged at the bottom of the ring main unit, and a pressure release chamber 907 is arranged on the left side inside the cable chamber 906;
The mechanism chamber 904, wherein the mechanism chamber 904 is used for controlling the opening and closing actions of the ring main unit, a mechanism chamber panel 903 is arranged on the right side of the mechanism chamber 904, and the mechanism chamber 904 is arranged at the upper end of the right side of the cable chamber 906 and is fixedly connected with the cable chamber 906;
a core unit gas box 908, wherein the core unit gas box 908 is arranged at the left side of the mechanism chamber 904, the right side of the core unit gas box 908 is fixedly connected with the mechanism chamber 904, and the lower end of the core unit gas box 908 is fixed at the upper end of the left side of the cable chamber 906;
the instrument box 901 is internally provided with a plurality of instruments for monitoring data in the ring main unit, the right side of the instrument box 901 is provided with an instrument box panel 902, and the instrument box 901 is fixed at the upper end of the mechanism room 904;
the instrument box panel 902, the mechanism compartment panel 903, and the cable compartment panel 905 are on the same vertical plane.
As shown in fig. 18-21, the lower three-position switch comprises an outer frame, the outer frame comprises lower three-position switch supports 7a, two lower three-position switch supports 7a are arranged, and the two lower three-position switch supports are oppositely arranged left and right;
the two connecting plates 9a are arranged on the connecting plates 9a, the connecting plates 9a are arranged between the front side and the rear side of the lower three-position switch support 7a, and the connecting plates 9a are in clamping connection with the lower three-position switch support 7 a;
The two insulating clamping plates 6a are arranged, the insulating clamping plates 6a are arranged on the front surface and the rear surface of the upper part of the lower three-position switch bracket, and the insulating clamping plates 6a are fixedly connected with the lower three-position switch bracket 7a through bolts;
the switch fixing plate 3a, wherein the switch fixing plate 3a is arranged at the left side of the insulating clamping plate 6a, and the switch fixing plate 3a is fixedly connected with the insulating clamping plate 6a through bolts;
the connecting plate 9a, the insulating clamping plate 6a and the lower three-position switch are combined into an outer frame;
arc extinguishing chamber assemblies 4a are symmetrically arranged between the insulating clamping plates 6a, and one end of each arc extinguishing chamber assembly 4a extends out of the insulating clamping plate 6a and is fixedly connected with the insulating clamping plate;
the switch fixing plate 3a is provided with a hexagonal main shaft 2a, the hexagonal main shaft 2a is provided with a shielding cover assembly 1a, one end of the hexagonal main shaft 2a is fixed on the switch fixing plate 3a, and the other end extends between the insulating clamping plates 6a and is in rotary connection with the arc extinguishing chamber assembly 4 a;
the inside between the lower three-position switch support 7a still is equipped with isolator main shaft 5a, isolator main shaft 5 a's both ends offset with lower three-position switch support 7a, and the switch adopts full metal shielding principle to reach insulating effect, and isolator main shaft 5a is integrated design, and direct drive blade is the deciliter and moves, and rigidity is good, and drive kinetic energy transmission efficiency is high, and the reliability is higher.
The number of the arc extinguishing chamber assemblies 4a is three, the arc extinguishing chamber assemblies 4a are axially equidistantly arranged, and the number of the shielding case assemblies 1a is consistent with that of the arc extinguishing chamber assemblies 4 a;
the arc extinguishing chamber assembly 4a comprises a cam bracket 41a, wherein the cam bracket 41a is arranged on the hexagonal main shaft 2a in a penetrating way, and the hexagonal main shaft 2a can freely rotate on the cam bracket 41 a;
a cam 47a, the cam 47a being provided on the cam holder 41a, the cam 47a being rotatable on the cam holder 41a, the cam 47a being provided with an L-shaped groove;
the contact pressure spring 42a, wherein a sliding block is arranged at the top of the contact pressure spring 42a and is arranged on an L-shaped groove of the cam 47a, and the contact pressure spring 42a is connected with the cam 47a through the sliding block;
the soft connection 46a is arranged at the bottom of the contact pressure spring 42a and is fixedly connected with the contact pressure spring 42a, and a connecting rod 4412a is arranged at the bottom of the soft connection 46 a;
the vacuum arc-extinguishing chamber 44a, wherein the vacuum arc-extinguishing chamber 44a is arranged at the lower end of the flexible connection 46a, a connecting rod 4412a is arranged at the top of the vacuum arc-extinguishing chamber 44a, the connecting rod 4412a at the bottom of the flexible connection 46a is fixedly connected with the connecting rod 4412a at the top of the vacuum arc-extinguishing chamber 44a, and an arc-extinguishing chamber supporting plate 45a is arranged on the peripheral wall of the vacuum arc-extinguishing chamber 44 a;
The bottom of the vacuum arc-extinguishing chamber 44a is provided with an arc-extinguishing chamber fixing seat 43a, and the arc-extinguishing chamber fixing seat 43a is fixedly connected with the vacuum arc-extinguishing chamber 44a through bolts.
The vacuum interrupter 44a includes a housing, which includes a movable cover plate 443a, a static cover plate 447a and a ceramic shell 448a, wherein the movable cover plate 443a, the static cover plate 447a and the ceramic shell 448a are sequentially and fixedly connected to each other to form a housing;
a guide sleeve 442a is arranged at the top of the shell, the guide sleeve 442a is embedded at the upper end of the movable cover plate 443a, and a movable conductive rod 441a is arranged in the guide sleeve 442a in a penetrating way;
the bottom of the movable conductive rod 441a is provided with a movable contact 4411a, the lower end of the movable conductive rod 441a is provided with a static conductive rod 446a, the top end of the static conductive rod 446a is provided with a static contact 4461a, and the movable contact 4411a and the outside of the static contact 4461a are sleeved with a shielding barrel 445a;
the outer periphery of the upper half part of the movable conductive rod 441a is provided with a corrugated tube 449a, the corrugated tube 449a is sleeved on the movable conductive rod 441a, and the lower end of the corrugated tube 449a is provided with a corrugated tube shielding cover 444a.
The outer wall that isolator main shaft 5a and right side lower three station switch support 7a are connected is equipped with dynamic seal 71a, and dynamic seal 71 a's the problem of hexagonal main shaft 2a gas leakage in the motion process can effectively be improved and reduced to the setting, guarantees the inside seal of isolator, and then guarantees inside insulating properties, guarantees the steady operation of device.
The lower extreme of insulating splint 6a is equipped with multiunit equalizer ring assembly 8a, equalizer ring assembly 8a is fixed on insulating splint 6a, equalizer ring assembly 8 a's quantity is unanimous with the quantity of explosion chamber subassembly 4a, multiunit equalizer ring assembly 8a is for electric field equalization for shielding some high-energy electric fields, guarantee the steady operation of device.
When the switching-on/off mechanism is used, the hexagonal spindle 2a rotates to drive the cam 47a on the three-phase arc-extinguishing chamber assembly 4a to rotate, the cam 47a rotates to drive the contact 4411a pressure spring to move up and down, and the flexible connection 46a at the lower end of the contact spring can move up and down, so that the movable end of the vacuum arc-extinguishing chamber 44a is driven to move up and down, and the movable contact 4411a in the vacuum arc-extinguishing chamber 44a is contacted with or separated from the fixed contact 4461a, so that switching-on/off action of the circuit breaker switch is realized.
As shown in fig. 6 or fig. 8, the water-cooling heat exchange structure 2 includes an inner heat exchange frame 201, an outer heat exchange frame 202 is disposed at the outer side of the inner heat exchange frame 201, a top sealing plate 203 is fixedly connected to the top of the inner heat exchange frame 201, a top sealing cover 204 connected to the outer heat exchange frame 202 is fixedly connected to the top of the top sealing plate 203, a diversion cavity 205 is disposed between the top sealing plate 203 and the top sealing cover 204, a diversion heat exchange gap 206 is disposed between the inner heat exchange frame 201 and the outer heat exchange frame 202, cavities are disposed in the inner heat exchange frame 201 and the outer heat exchange frame 202, a cooling liquid can be injected into the cavities of the inner heat exchange frame 201 and the outer heat exchange frame 202, so that the diversion heat exchange gap 206 between the whole inner heat exchange frame 201 and the outer heat exchange frame 202 forms a low-temperature environment, after the hot air is introduced into the diversion cavity 205, the hot air can quickly cool down along the diversion heat exchange gap 206 in the downward flow process, and the heat in the process when the hot air contacts the low-temperature inner heat exchange frame 201 and the outer heat exchange frame 202, the heat in the air is conducted into the cooling liquid flowing inside to the inner heat exchange frame 201 and the cooling liquid to the bottom end of the inner heat exchange frame 202, and the heat exchange air is completed;
As shown in fig. 6, the bottom of the inner side of the water-cooling heat exchange structure 2 is fixedly connected with a supporting structure 3, the supporting structure 3 comprises a supporting plate 301, the supporting plate 301 is fixed at the bottom of the inner wall of the inner heat exchange frame 201, a fixing plate 302 is fixedly connected between the front end of the supporting plate 301 and the outer heat exchange frame 202, and the supporting plate 301 can support, install and fix the air guide structure 4 and the electrical equipment;
as shown in fig. 3 or fig. 8, an air guiding structure 4 is arranged between the water-cooling heat exchange structure 2 and the supporting structure 3, the air guiding structure 4 comprises a lower circulating fan 401 and an upper circulating fan 402, the lower circulating fan 401 is fixedly arranged at the bottom center of the supporting plate 301, the upper circulating fan 402 is fixedly arranged at the bottom center of the top sealing plate 203, the centers of the supporting plate 301 and the top sealing plate 203 are provided with ventilation holes, cold air can be blown upwards when the lower circulating fan 401 works, so that cooling and heat dissipation of electric equipment in the ring main unit body 9 are realized, negative pressure suction force can be generated when the upper circulating fan 402 is started, and hot air in the ring main unit body 9 is sucked into the diversion cavity 205 so as to facilitate heat exchange of the subsequent hot air;
as shown in fig. 9 or fig. 10, the bottom of the inner side of the water-cooling heat exchange structure 2 is connected with a circulating cooling pipeline 5, the circulating cooling pipeline 5 comprises a liquid supply tank 501 and a plurality of second shunt pipes 504, the liquid supply tank 501 is fixed at the bottom of the inner heat exchange frame 201, the two sides and the rear end of the inner wall of the liquid supply tank 501 are fixedly connected with first shunt pipes 502, a first four-way valve 503 is arranged between the first shunt pipes 502, the two sides and the rear end of the inner wall of the outer heat exchange frame 202 are fixedly connected with second shunt pipes 504, a second four-way valve 505 is arranged between the plurality of second shunt pipes 504, the front end of the first four-way valve 503 is connected with a first connecting pipe 506, the front end of the second four-way valve 505 is connected with a second connecting pipe 507, a first three-way valve 508 is arranged between the first connecting pipe 506 and the second connecting pipe 507, the bottom end of the first three-way valve 508 is fixedly connected with a liquid supply pipe 509, the circulating cooling pipeline 5 is used for connecting the circulating cooling mechanism 8 and the water-cooling structure 2, after the circulating pump is started, low-temperature cooling liquid 509 in the liquid supply tank 701 can be pumped into the liquid supply pipe 509, the low-temperature cooling liquid is pumped into the liquid supply pipe 508, the low-temperature cooling liquid frame 202, the low-temperature cooling liquid enters the inner side frame 506 and the inner side frame 201 and the inner side heat exchange frame 201 through the first three-way valve 506 and the first three-way valve 201 and the second three-way valve 201 respectively, and the second three-way valve 201 heat exchange mechanism 201 respectively, and the first three-way valve 201 and the lower cooling liquid flows into the inner side heat exchange frame 201 and the first three-phase section and the second three-phase heat exchange frame 201 respectively through the first three-way valve 201 and the first three-phase heat exchange frame and the second side and the first heat exchange frame and second heat pipe 201 and the second heat exchange structure and the second heat pipe 201 and the first heat exchange structure and the lower part and second heat pipe and the lower part and flow pipeline and the lower part and upper part and lower part and the lower part and lower part type heat pipeline and the lower part type heat pipeline and so the lower part and lower part type heat structure and so as respectively;
As shown in fig. 9, the rear end of the water-cooling heat exchange structure 2 is fixedly connected with a refrigerating fluid reflux mechanism 6, the refrigerating fluid reflux mechanism 6 comprises a first reflux pipe 601 and a second reflux pipe 602, a second three-way valve 603 is arranged between the first reflux pipe 601 and the second reflux pipe 602, the bottom end of the second three-way valve 603 is connected with a main reflux pipe 604, the top parts of the rear ends of the inner heat exchange frame 201 and the outer heat exchange frame 202 are respectively provided with a through hole and communicated with the first reflux pipe 601 and the second reflux pipe 602, so that the heat exchanged cooling fluid can flow into the second three-way valve 603 through the first reflux pipe 601 and the second reflux pipe 602, then flow into the main reflux pipe 604 through the second three-way valve 603, and finally flow back into the reflux tank 702 through the main reflux pipe 604;
as shown in fig. 2 or fig. 3, a refrigerating fluid storage mechanism 7 is installed at the bottom of the center of the ring main unit body 9, the refrigerating fluid storage mechanism 7 comprises a fluid supply tank 701 and a reflux tank 702, a micro refrigerator 703 is arranged between the fluid supply tank 701 and the reflux tank 702, the bottom end of a main reflux pipe 604 is communicated with the reflux tank 702, a micro pump and a refrigerating module are arranged in the micro refrigerator 703, one end of the micro pump is connected with the reflux tank 702, the other end of the micro pump is connected with the refrigerating module, the outlet end of the refrigerating module is connected with the fluid supply tank 701, cooling fluid is stored in the fluid supply tank 701 and the reflux tank 702, the heated cooling fluid is stored in the reflux tank 702, the micro pump can pump the heated cooling fluid in the reflux tank 702 through a pipeline, then the cooling fluid is sent into the refrigerating module for quick cooling, and the cooled cooling fluid flows back into the fluid supply tank 701 through the outlet end of the refrigerating module to realize circulating cooling;
As shown in fig. 11, a circulating cooling mechanism 8 is installed between the refrigerating fluid storage mechanism 7 and the circulating cooling pipeline 5, the circulating cooling mechanism 8 includes a supporting seat 801, the supporting seat 801 is fixed at the center of the inner surface of the bottom of the working box 104, the top of the supporting seat 801 is fixedly connected with a supporting frame 802, a circulating pump 803 is installed on the supporting frame 802, a water outlet of the circulating pump 803 is connected with a liquid supply pipe 509, a liquid suction pipe 804 is fixedly connected with a water suction port of the circulating pump 803, the other end of the liquid suction pipe 804 is connected with the liquid supply box 701, and after the circulating pump 803 is started, the circulating pump 803 can pump the low-temperature cooling liquid in the liquid supply box 701 into the liquid supply pipe 509 so as to continuously supply the low-temperature cooling liquid into the inner heat exchange frame 201 and the outer heat exchange frame 202.
The heat dissipation method of the independent heat dissipation device of the closed ring main unit comprises the following specific steps:
step one: when the electrical equipment in the ring main unit body 9 works for a long time to emit a large amount of heat, the air guide structure 4, the refrigerating fluid storage mechanism 7 and the circulating cooling mechanism 8 are started, the lower circulating fan 401 blows cold air to the electrical equipment in the ring main unit body 9 to cool and dissipate heat, the upper circulating fan 402 can generate negative pressure suction, and hot air in the ring main unit body 9 is sucked into the diversion cavity 205;
Step two: after the hot air enters the diversion cavity 205, the hot air enters the diversion heat exchange gap 206 through the bottom peripheral side of the diversion cavity 205, and then the hot air flows downwards along the diversion heat exchange gap 206;
step three: because the inner heat exchange frame 201 and the outer heat exchange frame 202 are communicated with the circulating cooling liquid, heat exchange can be realized in the process that hot air flows downwards along the diversion heat exchange gap 206, the temperature of the hot air can be quickly reduced when the hot air contacts the inner heat exchange frame 201 and the outer heat exchange frame 202 with low temperature, and the heat in the air can be conducted into the cooling liquid flowing inside through the inner heat exchange frame 201 and the outer heat exchange frame 202;
step four: when the air flows to the bottom end between the inner heat exchange frame 201 and the outer heat exchange frame 202, the hot air completes heat exchange to form cold air, and the cold air is sucked by the lower circulating fan 401 and blown upwards to realize the circulating heat dissipation and cooling of the electrical equipment;
step five: in the working process of the air guide structure 4, the refrigerating fluid storage mechanism 7 and the circulating cooling mechanism 8 also synchronously operate, the circulating pump 803 pumps the low-temperature cooling fluid in the fluid supply tank 701 into the fluid supply pipe 509, the low-temperature cooling fluid enters the first three-way valve 508 through the fluid supply pipe 509, then enters the first four-way valve 503 and the second four-way valve 505 through the first connecting pipe 506 and the second connecting pipe 507 respectively, and enters the inner bottoms of the inner heat exchange frame 201 and the outer heat exchange frame 202 respectively through the first shunt pipes 502 and the second shunt pipes 504 respectively, so that the cooling fluid flows upwards from the bottoms of the cavities of the inner heat exchange frame 201 and the outer heat exchange frame 202;
Step six: the heat exchanged cooling liquid flows into the second three-way valve 603 through the first return pipe 601 and the second return pipe 602, then enters the main return pipe 604 through the second three-way valve 603, and finally flows back into the return tank 702 through the main return pipe 604;
step seven: the reflux tank 702 is used for storing the warmed cooling liquid, the micro refrigerator 703 is arranged between the liquid supply tank 701 and the reflux tank 702, the micro liquid pump and the refrigerating module are arranged in the micro refrigerator 703, the micro liquid pump can pump the warmed cooling liquid in the reflux tank 702 through a pipeline, then the cooling liquid is sent into the refrigerating module for quick cooling, and the cooled cooling liquid flows back to the liquid supply tank 701 through the outlet end of the refrigerating module so as to realize circulating cooling.
A detection method of an atmospheric pressure sealed environment-friendly ring main unit comprises the following specific steps:
step A: starting an intelligent self-checking system:
firstly, it is necessary to ensure that all devices inside the ring main unit are connected to an intelligent self-checking system, and the system can be composed of a Central Processing Unit (CPU) or a Microcontroller (MCU) and a set of matched sensors, and after the system is powered on, the self-checking system can be started by a software command or a physical switch.
And (B) step (B): collecting operation data of equipment in the box body:
the process of collecting data typically involves a variety of sensors that can monitor and record the operating state of the device in real time. For example, a current sensor may monitor the current condition of the device, a temperature sensor may monitor the temperature of the device, a vibration sensor may detect whether an abnormal vibration exists in the device, etc., and the data collected by the sensor may be sent to a central processor for analysis.
Step C: analyzing the operation data, judging the working condition of the equipment, and realizing a predictive maintenance function:
after collecting the device operation data, the central processing unit runs a preset algorithm for analysis. This process may include comparing the real-time data to historical data, comparing the real-time data to a preset normal range, and so forth. From these comparisons, the processor can determine whether the device is operating properly. And predicting possible faults of the equipment based on historical operation data of the equipment by using a Long Short-Term Memory (LSTM) network learning algorithm, and maintaining in advance to avoid shutdown or damage of the equipment.
Step D: if an equipment anomaly or a potential problem is found, a report is generated and an alarm is raised:
When the system determines that an abnormality or potential problem exists with the device, the central processor generates a detailed report that includes the specific circumstances of the abnormality, the possible causes, suggested treatment, etc. At the same time, the system can send out an alarm in a preset mode, for example, through sound, light or sending an email or a short message to an operator.
The specific training process for implementing Long Short-Term Memory (LSTM) networks first requires an understanding of the basic architecture of the LSTM network. In LSTM, one important concept is gates (gates), including forget gates (for gates), input gates (input gates), and output gates (output gates). Together they control the flow of information in the LSTM cells.
The basic formula and structure of LSTM is as follows:
first, there is a forget gate f_t:
f_t = σ(W_f · [h_(t-1), x_t] + b_f)
where σ is the sigmoid function, h_ (t-1) is the hidden state of the last time step, x_ t is the input of the current time step, w_ f is the weight matrix of the forgetting gate, b_ f is the bias term of the forgetting gate,
then, there is an input gate i_t and candidate cell state：
Where W i, b i, W C and b C are weight matrices and bias terms for the respective gates and states,
Next, the cell state c_t is updated:
finally, there is an output gate o_t and a hidden state h_t:
o_t = σ(W_o · [h_(t-1), x_t] + b_o)
h_t = o_t * tanh(C_t)
where W o and b o are the weight matrix and bias terms of the output gates,
in order to integrate the self-checking function of the ring main unit, it is necessary to determine the inputs and outputs of the LSTM network,
input x: this should be the operational data collected from the ring main unit internal devices, such as current, voltage, temperature, vibration, etc. These parameters may require some pre-processing, e.g. normalization, so that they are on the same scale,
output y: this should be the operational state of the device, such as normal operation and malfunction. During the training process, a set of tag data, i.e., the correct output for each input data, is required for LSTM network learning,
to train an LSTM network, a loss function (loss function), such as cross-entropy loss (cross-entropy loss), needs to be defined to measure the difference between the predicted and actual values of the network. The weights and biases of the network are then updated by back propagation (backprojection) using a gradient descent (gradient descent) or variant thereof (e.g., adam, RMSProp, etc.) optimization algorithm, to minimize the loss function,
In the context of predictive maintenance, tag data typically represents the health or expected failure of the device, meaning that each input data, e.g., operational data (e.g., current, voltage, temperature, etc.) of the ring main unit internal device, should be associated with a tag that indicates the status of the device under such particular input conditions.
To give a specific embodiment, the following scenario may be considered:
the current and temperature data of the ring main unit device are collected as input data, and for each set of current and temperature data, there is a tag corresponding to it, indicating the status of the device at that particular current and temperature. For example, the tag may be "normal" or "faulty," or a more specific type of fault, such as "overheated" or "over-current.
The following data are assumed:
input: current = 10A, temperature = 30 ℃, tag: normal state
Input: current = 15A, temperature = 50 ℃, tag: superheating
Input: current = 20A, temperature = 30 ℃, tag: excessive current
Input: current = 20A, temperature = 50 ℃, tag: excessive heat and current
In this example, the task is to have the LSTM network learn the ability to predict the device state from the current and temperature data, and during the training process the network will try to find the relationship between the input data and the tag. In actual use, new current and temperature data may then be input into the network, which will give the predicted device status, which is the output.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (18)
1. The utility model provides a sealed environmental protection looped netowrk cabinet of ordinary pressure which characterized in that: the novel ring main unit comprises a protection cabinet body (1), a ring main unit body (9) and a water-cooling heat exchange structure (2) fixed in the protection cabinet body (1), wherein a supporting structure (3) is fixedly connected to the bottom of the inner side of the water-cooling heat exchange structure (2), and an air guide structure (4) is arranged at the lower end of the supporting structure (3);
the bottom of the inner side of the water-cooling heat exchange structure (2) is connected with a circulating cooling pipeline (5), and the rear end of the water-cooling heat exchange structure (2) is fixedly connected with a refrigerating fluid reflux mechanism (6);
the bottom at the center of the protection cabinet body (1) is provided with a refrigerating fluid storage mechanism (7), and a circulating cooling mechanism (8) is arranged between the refrigerating fluid storage mechanism (7) and the circulating cooling pipeline (5).
2. The atmospheric sealed environment-friendly ring main unit according to claim 1, wherein: the ring main unit body (9) comprises a cable chamber (906), a cable chamber panel (905) is arranged on the right side of the cable chamber (906), the cable chamber (906) is arranged at the bottom of the ring main unit, and a pressure release chamber (907) is arranged on the left side inside the cable chamber (906);
The mechanism chamber (904) is used for controlling opening and closing actions of the ring main unit, a mechanism chamber panel (903) is arranged on the right side of the mechanism chamber (904), and the mechanism chamber (904) is arranged at the upper end of the right side of the cable chamber (906) and fixedly connected with the cable chamber (906);
the core unit gas box (908), the core unit gas box (908) is arranged on the left side of the mechanism chamber (904), the right side of the core unit gas box (908) is fixedly connected with the mechanism chamber (904), the lower end of the core unit gas box (908) is fixed on the upper left end of the cable chamber (906), and a lower three-station switch is arranged in the core unit gas box (908);
the instrument box (901) is internally provided with a plurality of instruments for monitoring data in the ring main unit, the right side of the instrument box (901) is provided with an instrument box panel (902), and the instrument box (901) is fixed at the upper end of the mechanism chamber (904);
the instrument box panel (902), the mechanism compartment panel (903) and the cable compartment panel (905) are on the same vertical plane.
3. The atmospheric sealed environment-friendly ring main unit according to claim 2, wherein: the protection cabinet body (1) comprises a cabinet body (101), one side of the front end of the cabinet body (101) is rotationally connected with a cabinet door (102), the top of the cabinet body (101) is fixedly connected with a waterproof canopy (103), the bottom of the cabinet body (101) is fixedly connected with a working box (104), the rear end of the working box (104) is provided with a sealing cover plate (105), and the bottom of the working box (104) is fixedly connected with a supporting base (106).
4. A sealed environmental protection looped netowrk cabinet of ordinary pressure according to claim 3, wherein: the water-cooling heat exchange structure (2) comprises an inner heat exchange frame (201), an outer heat exchange frame (202) is arranged on the outer side of the inner heat exchange frame (201), a top sealing plate (203) is fixedly connected to the top of the inner heat exchange frame (201), a top sealing cover (204) connected with the outer heat exchange frame (202) is fixedly connected to the top of the top sealing plate (203), a diversion cavity (205) is arranged between the top sealing plate (203) and the top sealing cover (204), and a diversion heat exchange gap (206) is arranged between the inner heat exchange frame (201) and the outer heat exchange frame (202).
5. The atmospheric sealed environment-friendly ring main unit according to claim 4, wherein: the support structure (3) comprises a support plate (301), wherein the support plate (301) is fixed at the bottom of the inner wall of the inner heat exchange frame (201), and a fixing plate (302) is fixedly connected between the front end of the support plate (301) and the outer heat exchange frame (202).
6. The atmospheric sealed environment-friendly ring main unit according to claim 5, wherein: the air guide structure (4) comprises a lower circulating fan (401) and an upper circulating fan (402), wherein the lower circulating fan (401) is fixedly arranged at the bottom center of the supporting plate (301), the upper circulating fan (402) is fixedly arranged at the bottom center of the top sealing plate (203), and ventilation holes are formed in the centers of the supporting plate (301) and the top sealing plate (203).
7. The atmospheric sealed environment-friendly ring main unit according to claim 4, wherein: the circulating cooling pipeline (5) comprises a liquid supply tank (501) and a plurality of second shunt pipes (504), wherein the liquid supply tank (501) is fixed at the bottom of the inner heat exchange frame (201), two sides of the inner wall of the liquid supply tank (501) and the rear end are fixedly connected with first shunt pipes (502), a plurality of first four-way valves (503) are arranged between the first shunt pipes (502), two sides of the inner wall of the outer heat exchange frame (202) and the rear end are fixedly connected with second shunt pipes (504), a plurality of second four-way valves (505) are arranged between the second shunt pipes (504), the front end of each first four-way valve (503) is connected with a first connecting pipe (506), a first three-way valve (508) is arranged between each first connecting pipe (506) and each second connecting pipe (507), and the bottom ends of each first three-way valve (508) are fixedly connected with liquid supply pipes (509).
8. The atmospheric sealed environment-friendly ring main unit according to claim 4, wherein: the refrigerating fluid reflux mechanism (6) comprises a first reflux pipe (601) and a second reflux pipe (602), a second three-way valve (603) is arranged between the first reflux pipe (601) and the second reflux pipe (602), and the bottom end of the second three-way valve (603) is connected with a main reflux pipe (604).
9. The atmospheric sealed environment-friendly ring main unit according to claim 8, wherein: the refrigerating fluid storage mechanism (7) comprises a fluid supply box (701) and a reflux box (702), a micro refrigerator (703) is arranged between the fluid supply box (701) and the reflux box (702), the bottom end of the main reflux pipe (604) is communicated with the reflux box (702), a micro fluid pump and a refrigerating module are arranged in the micro refrigerator (703), one end of the micro fluid pump is connected with the reflux box (702), the other end of the micro fluid pump is connected with the refrigerating module, and the outlet end of the refrigerating module is connected with the fluid supply box (701).
10. The atmospheric sealed environment-friendly ring main unit according to claim 9, wherein: the circulating cooling mechanism (8) comprises a supporting seat (801), the supporting seat (801) is fixed at the center of the inner surface of the bottom of the working box (104), a supporting frame (802) is fixedly connected to the top of the supporting seat (801), a circulating pump (803) is installed on the supporting frame (802), a water outlet of the circulating pump (803) is connected with a liquid supply pipe (509), a liquid suction pipe (804) is fixedly connected to a water suction port of the circulating pump (803), and the other end of the liquid suction pipe (804) is connected with the liquid supply box (701).
11. The atmospheric sealed environment-friendly ring main unit according to claim 2, wherein: the lower three-position switch comprises an outer frame, the outer frame comprises lower three-position switch supports (7 a), two lower three-position switch supports (7 a) are arranged, and the two lower three-position switch supports are oppositely arranged left and right;
the two connecting plates (9 a) are arranged, the connecting plates (9 a) are arranged between the front side and the rear side of the lower three-station switch support (7 a), and the connecting plates (9 a) are connected with the lower three-station switch support (7 a) in a clamping mode;
the two insulating clamping plates (6 a) are arranged, the insulating clamping plates (6 a) are arranged on the front surface and the rear surface of the upper part of the lower three-position switch bracket, and the insulating clamping plates (6 a) are fixedly connected with the lower three-position switch bracket (7 a) through bolts;
the switch fixing plate (3 a) is arranged on the left side of the insulating clamping plate (6 a), and the switch fixing plate (3 a) is fixedly connected with the insulating clamping plate (6 a) through bolts;
the connecting plate (9 a), the insulating clamping plate (6 a) and the lower three-station switch are combined into an outer frame;
arc extinguishing chamber components (4 a) are symmetrically arranged between the insulating clamping plates (6 a), and one end of each arc extinguishing chamber component (4 a) extends out of the insulating clamping plate (6 a) and is fixedly connected with the insulating clamping plate;
The switch fixing plate (3 a) is provided with a hexagonal main shaft (2 a), the hexagonal main shaft (2 a) is provided with a shielding cover assembly (1 a), one end of the hexagonal main shaft (2 a) is fixed on the switch fixing plate (3 a), and the other end of the hexagonal main shaft extends between the insulating clamping plates (6 a) and is in rotary connection with the arc extinguishing chamber assembly (4 a);
and a disconnecting switch main shaft (5 a) is further arranged in the space between the lower three-station switch brackets (7 a), and two ends of the disconnecting switch main shaft (5 a) are propped against the lower three-station switch brackets (7 a).
12. The atmospheric sealed environment-friendly ring main unit according to claim 11, wherein: the arc extinguishing chamber assemblies (4 a) are provided with three, the arc extinguishing chamber assemblies (4 a) are axially equidistantly arranged, and the number of the shielding cover assemblies (1 a) is consistent with that of the arc extinguishing chamber assemblies (4 a);
the arc extinguishing chamber assembly (4 a) comprises a cam bracket (41 a), the cam bracket (41 a) is arranged on the hexagonal main shaft (2 a) in a penetrating way, and the hexagonal main shaft (2 a) can freely rotate on the cam bracket (41 a);
a cam (47 a), wherein the cam (47 a) is arranged on a cam (47 a) bracket, the cam (47 a) can rotate on the cam (47 a) bracket, and the cam (47 a) is provided with an L-shaped groove;
The contact pressure spring (42 a), the top of the contact pressure spring (42 a) is provided with a sliding block, the sliding block is arranged on an L-shaped groove of the cam (47 a), and the contact pressure spring (42 a) is connected with the cam (47 a) through the sliding block;
the soft connection (46 a) is arranged at the bottom of the contact pressure spring (42 a) and is fixedly connected with the contact pressure spring (42 a), and a connecting rod (4412 a) is arranged at the bottom of the soft connection;
the vacuum arc-extinguishing chamber (44 a) is arranged at the lower end of the soft connection, a connecting rod (4412 a) is arranged at the top of the vacuum arc-extinguishing chamber (44 a), the connecting rod (4412 a) at the bottom of the soft connection (46 a) is fixedly connected with the connecting rod (4412 a) at the top of the vacuum arc-extinguishing chamber (44 a), and an arc-extinguishing chamber supporting plate (45 a) is arranged on the peripheral wall of the vacuum arc-extinguishing chamber (44 a);
the bottom of vacuum explosion chamber (44 a) is equipped with explosion chamber fixing base (43 a), explosion chamber fixing base (43 a) pass through bolt and vacuum explosion chamber (44 a) fixed connection.
13. The atmospheric sealed environment-friendly ring main unit according to claim 12, wherein: the vacuum arc-extinguishing chamber (44 a) comprises a shell, wherein the shell comprises a movable cover plate (443 a), a static cover plate (447 a) and a porcelain shell (448 a), and the movable cover plate (443 a), the static cover plate (447 a) and the porcelain shell (448 a) are sequentially and fixedly connected to form the shell;
A guide sleeve (442 a) is arranged at the top of the shell, the guide sleeve (442 a) is embedded at the upper end of the movable cover plate (443 a), and a movable conducting rod (441 a) is arranged in the guide sleeve (442 a) in a penetrating way;
the bottom of the movable conducting rod (441 a) is provided with a movable contact (4411 a), the lower end of the movable conducting rod (441 a) is provided with a static conducting rod (446 a), the top end of the static conducting rod (446 a) is provided with a static contact (4461 a), and the outsides of the movable contact (4411 a) and the static contact (4461 a) are sleeved with a shielding cylinder (445 a);
the periphery of the upper half part of the movable conducting rod (441 a) is provided with a corrugated pipe (449 a), the corrugated pipe (449 a) is sleeved on the movable conducting rod (441 a), and the lower end of the corrugated pipe (449 a) is provided with a corrugated pipe shielding cover (444 a).
14. The atmospheric sealed environment-friendly ring main unit as defined in claim 13, wherein: and a dynamic seal (71 a) is arranged on the outer wall of the isolating switch main shaft (5 a) connected with the right lower three-station switch bracket (7 a).
15. The atmospheric sealed environment-friendly ring main unit as defined in claim 13, wherein: the insulating splint (6 a) lower extreme is equipped with multiunit equalizer ring subassembly (8 a), equalizer ring subassembly (8 a) are fixed on insulating splint (6 a), the quantity of equalizer ring subassembly (8 a) is unanimous with the quantity of explosion chamber subassembly (4 a).
16. The heat dissipation method of the normal pressure sealed environment-friendly ring main unit according to any one of claims 1 to 15, comprising the following specific steps:
step one: when the electrical equipment in the ring main unit body (1) works for a long time to emit a large amount of heat, the air guide structure (4), the refrigerating fluid storage mechanism (7) and the circulating cooling mechanism (8) are started, the lower circulating fan (401) blows cold air to the electrical equipment in the ring main unit body (1) for cooling and radiating, the upper circulating fan (402) can generate negative pressure suction, and hot air in the ring main unit body (1) is sucked into the diversion cavity (205);
step two: after the hot air enters the diversion cavity (205), the hot air enters the diversion heat exchange gap (206) through the bottom peripheral side of the diversion cavity (205), and then the hot air flows downwards along the diversion heat exchange gap (206);
step three: because the inner heat exchange frame (201) and the outer heat exchange frame (202) are communicated with circulating cooling liquid, heat exchange can be realized in the process that hot air flows downwards along the diversion heat exchange gap (206), the temperature of the hot air can be quickly reduced when the hot air contacts the inner heat exchange frame (201) and the outer heat exchange frame (202) with low temperature, and the heat in the air can be conducted into the cooling liquid flowing inside through the inner heat exchange frame (201) and the outer heat exchange frame (202);
Step four: when the air flows to the bottom end between the inner heat exchange frame (201) and the outer heat exchange frame (202), the hot air completes heat exchange to form cold air, and the cold air is sucked by a lower circulating fan (401) and blown upwards to realize the circulating heat dissipation and cooling of the electrical equipment;
step five: in the working process of the air guide structure (4), the refrigerating fluid storage mechanism (7) and the circulating cooling mechanism (8) are synchronously operated, the circulating pump (803) pumps the low-temperature cooling fluid in the fluid supply tank (701) into the fluid supply pipe (509), the low-temperature cooling fluid enters the first three-way valve (508) through the fluid supply pipe (509), then enters the first four-way valve (503) and the second four-way valve (505) through the first connecting pipe (506) and the second connecting pipe (507) respectively, and enters the inner bottoms of the inner heat exchange frame (201) and the outer heat exchange frame (202) respectively through the first shunt pipes (502) and the second shunt pipes (504) respectively, so that the cooling fluid flows upwards from the bottoms of the cavities of the inner heat exchange frame (201) and the outer heat exchange frame (202);
step six: the heat-exchanged cooling liquid flows into a second three-way valve (603) through a first return pipe (601) and a second return pipe (602), then enters a main return pipe (604) through the second three-way valve (603), and finally flows back into a return tank (702) through the main return pipe (604);
Step seven: be used for storing the coolant liquid after the intensification in backward flow case (702), be equipped with miniature refrigerator (703) between confession liquid case (701) and backward flow case (702), miniature refrigerator (703) are inside to be equipped with miniature drawing liquid pump and refrigerating module, and miniature drawing liquid pump can be through the coolant liquid after the temperature rising in pipe extraction backward flow case (702), then send into refrigerating module with the coolant liquid and carry out quick cooling, in confession liquid case (701) is backward flow to the coolant liquid after the cooling through refrigerating module's exit end to realize circulation cooling.
17. The method for detecting the environment-friendly ring main unit sealed at normal pressure according to any one of claims 1 to 15, which is characterized by comprising the following specific steps:
step A: starting an intelligent self-checking system; the system consists of a CPU or a MCU and a set of matched sensors, and after the system is electrified, the self-checking system is started through a software command or a physical switch;
and (B) step (B): collecting operation data of equipment in the box body;
the process of collecting data typically involves a variety of sensors that can monitor and record the operating state of the device in real time; these sensors include a current sensor, a temperature sensor, and a vibration sensor, the current sensor can monitor the current condition of the device, the temperature sensor can monitor the temperature of the device, and the vibration sensor can detect whether an abnormal vibration exists in the device;
Step C: analyzing the operation data, judging the working condition of the equipment, and realizing a predictive maintenance function; after collecting the equipment operation data, the central processing unit operates a preset algorithm for analysis;
step D: if an abnormality or potential problem is found in the device, a report is generated and an alarm is raised.
18. The method for detecting an atmospheric sealed environment-friendly ring main unit according to claim 17, wherein the analysis operation data in the step C is a long-short-term memory LSTM network learning algorithm, and the possible faults of the equipment are predicted based on the historical operation data of the equipment, and are maintained in advance to avoid the shutdown or damage of the equipment;
in LSTM, including gate, forget gate for gate, input gate and output gate, which together control the flow of information in LSTM cell;
the basic formula and structure of LSTM is as follows:
first, there is a forget gate f_t:
f_t = σ(W_f · [h_(t-1), x_t] + b_f)
where σ is the sigmoid function, h_ (t-1) is the hidden state of the last time step, x_ t is the input of the current time step, w_ f is the weight matrix of the forgetting gate, b_ f is the bias term of the forgetting gate,
second, input gate i_t and candidate cell state
Where W i, b i, W C and b C are weight matrices and bias terms for the respective gates and states,
next, the cell state c_t is updated:
finally, the gate o_t and the hidden state h_t are output:
o_t = σ(W_o · [h_(t-1), x_t] + b_o)
h_t = o_t * tanh(C_t)
where W o and b o are the weight matrix and bias terms of the output gates,
wherein, input x: is the operation data collected from the internal equipment of the ring main unit, and comprises parameters such as current, voltage, temperature, vibration and the like,
output y: is the operating state of the device.
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