CN114665402A

CN114665402A - Ring main unit cooling and dehumidifying device

Info

Publication number: CN114665402A
Application number: CN202210321864.8A
Authority: CN
Inventors: 胡海彬
Original assignee: Sanya Power Supply Bureau of Hainan Power Grid Co Ltd
Current assignee: Sanya Power Supply Bureau of Hainan Power Grid Co Ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-06-24

Abstract

The invention provides a ring main unit cooling and dehumidifying device which comprises a ring main unit body, a hot air pipe network and a cold air pipe network, wherein the input end of the hot air pipe network is communicated with the upper part of the ring main unit body, the output end of the hot air pipe network is sequentially communicated with a fan, an air conditioner and a dehumidifier, the output end of the dehumidifier is communicated with the cold air pipe network, the output end of the cold air pipe network is arranged below the inside of the ring main unit body, the cold air pipe network is communicated with an air outlet assembly, an adjusting assembly for adjusting the cold air injection angle of the air outlet assembly is arranged in the ring main unit body, an equipment signal output end arranged in the ring main unit body is electrically connected with a processor, and the processor is electrically connected with the air conditioner, the dehumidifier and the fan. According to the invention, the working efficiency of the fan, the air conditioner and the dehumidifier can be controlled according to the acquired working heat productivity of the electrical equipment in the ring main unit body, the energy consumption of the fan, the air conditioner and the dehumidifier is reduced, the purposes of cooling and dehumidifying are achieved, and the cooling and dehumidifying effects of the ring main unit body are improved.

Description

Ring main unit cooling and dehumidifying device

Technical Field

The invention relates to the technical field of ring main units, in particular to a ring main unit cooling and dehumidifying device.

Background

Along with the popularization and application of distribution cables and the development of power grid intelligent construction in our city in recent years, more and more 10k V overhead lines are transformed into cables to be merged into the ground, and therefore a ring main unit and a cable tapping box need to be installed to tap the cables to meet the requirement of using a distribution network ring. Particularly, a batch of ring main units with automation functions are added, secondary modules such as protection, automation, communication, power supply and the like are arranged in the ring main units, and the modules require the daily operation temperature to be about 25 ℃. The three belong to tropical marine monsoon climate areas. The whole-year sunshine duration is 2534 hours, the annual average temperature is 25.7, the average temperature in summer (5-9 months) is 28.7 ℃, and the daily maximum temperature is about 36 ℃; the average annual humidity is about 80 percent, and is a typical high-temperature, high-humidity and high-salt climate environment. At present, the shell of the ring main unit is generally a sealed iron shell, under the superposition of a plurality of factors such as ambient temperature, sunlight and heat generated by equipment working in the ring main unit, the internal temperature is generally as high as sixty degrees in summer, but the ring main unit is sealed to destroy convection conditions required by heat dissipation, stagnant air which cannot circulate can form a stagnant layer on the surface of the equipment or elements, the stagnant layer is equivalent to a thermal insulation layer and can generate extremely adverse influence on the heat dissipation of the equipment or elements in the ring main unit, the humidity and the salt density are extremely high, long-term operation in the environment of three-high can cause the reliability of a secondary module in the ring main unit to be seriously influenced and the service life to be greatly shortened, and simultaneously, the corrosion and discharge of a cable head, the corrosion and the corrosion of a circuit breaker and an isolation switch operating mechanism can be caused, even the ring main unit can cause the discharge explosion of the ring main unit due to condensation phenomenon, causes large-area power failure accidents, but the existing ring main unit has poor cooling and dehumidifying effects, for example, the intelligent micro-positive pressure fresh air dehumidifying system of the ring main unit with the patent number of CN201910732634.9 discloses a system comprising a condensation preventing device and a ring main unit, the anti-condensation device comprises a closed shell, an anti-condensation combination, a temperature and humidity measuring probe and a measurement and control circuit module, the anti-condensation combination consists of a semiconductor condenser, a centrifugal fan and a heater, the semiconductor condenser and the centrifugal fan are sequentially connected in series in the closed shell according to the flowing direction of air flow, the temperature and humidity measuring probe and the heater are both arranged in the ring main unit body, the closed shell is arranged at one side of the ring main unit body and communicated with the ring main unit body, one side of the closed shell is provided with an air inlet, one side of the ring main unit body is provided with an air outlet, a hot air outlet and a cold air inlet are unreasonable in arrangement, and the dehumidification and cooling effects are poor.

Disclosure of Invention

Therefore, the invention provides a ring main unit cooling and dehumidifying device, which is used for prolonging the service life of primary and secondary electrical equipment in a ring main unit body and achieving the maximum economic service life.

The technical scheme of the invention is realized as follows:

the utility model provides a looped netowrk cabinet cooling dehydrating unit, includes looped netowrk cabinet body, hot-blast pipe network and cold wind pipe network, the input of hot-blast pipe network with the upper portion intercommunication of looped netowrk cabinet body, the output of hot-blast pipe network communicates in proper order has fan, air conditioner and dehumidifier, the output of dehumidifier with cold wind pipe network intercommunication, the output of cold wind pipe network is located the inside below of looped netowrk cabinet body, cold wind pipe network intercommunication has the air-out subassembly, this internal being equipped with of looped netowrk cabinet is used for adjusting the cold wind injection angle's of air-out subassembly adjusting part, this internal equipment signal output end electricity of installation of looped netowrk cabinet is connected with the treater, the treater with air conditioner, dehumidifier and fan electricity are connected.

Preferably, the equipment installed in the ring main unit comprises a humidity sensor, a temperature sensor and electrical equipment, and the signal output ends of the temperature sensor, the humidity sensor and the electrical equipment are electrically connected with the processor.

Preferably, the top end of the outside of the ring main unit is fixed with a protection assembly, the protection assembly comprises a protection cover plate and a support, and two ends of the support are respectively connected with the ring main unit and the protection cover plate.

Preferably, the hot air pipe network comprises a hot air guide pipe and a plurality of hot air branch pipes, the input ends of the hot air branch pipes are respectively communicated with the ring main unit through a plurality of air outlets, the output ends of the hot air branch pipes are communicated with the hot air guide pipe, and the output ends of the hot air guide pipe are communicated with the fan.

Preferably, the cold air pipe network comprises a cold air conduit and a plurality of cold air branch pipes, an input end of the cold air conduit is communicated with the dehumidifier, an output end of the cold air conduit is communicated with the cold air branch pipes, and the cold air branch pipes are communicated with the air outlet assemblies.

Preferably, the air outlet assembly comprises an air outlet pipe and a hose, and two ends of the hose are respectively communicated with the cold air branch pipe and the air outlet pipe.

Preferably, the adjusting part includes mount, guide rail, rack and a plurality of actuating lever, the mount is fixed in this internal, a plurality of the actuating lever with the mount rotates to be connected, rack sliding connection in on the guide rail, the rack is used for driving a plurality of the actuating lever rotates, the actuating lever with a plurality of air-out union coupling.

Preferably, a toothed ring is sleeved on the driving rod close to one end of the guide rail, and the rack is meshed with the toothed ring.

Preferably, one side of the air outlet pipe is provided with a clamping groove, the driving rod is clamped in the clamping groove, and the driving rod passes through the clamping groove and is connected with the air outlet pipe.

Compared with the prior art, the invention has the beneficial effects that:

(1) the distribution of a flow field and a temperature field in the ring main unit body is improved, so that the temperature in the ring main unit body can reach the operating temperature of the working condition of the electrical equipment in the ring main unit body, and the service life of the electrical equipment, especially secondary electrical equipment, of the ring main unit body is prolonged;

(2) the operation environment of the electrical equipment of the ring main unit body is improved, and the phenomena of electrical equipment damage and line forced power failure caused by condensation generated by a charged body and corrosion and discharge of an insulator are prevented;

(3) the air humidity and the salt density in the ring main unit body are improved, the circuit breaker and an isolating switch operating mechanism are prevented from being corroded, the power failure maintenance frequency is reduced, and the power supply reliability is improved;

(4) the heating value and the internal humidity of the ring main unit can be calculated according to the working power of the internal electrical equipment of the ring main unit, the working power of the fan, the air conditioner and the dehumidifier is effectively controlled, and the energy consumption of the fan, the air conditioner and the dehumidifier is improved.

Drawings

FIG. 1 is a schematic perspective view of a cooling and dehumidifying device of a ring main unit according to the present invention;

FIG. 2 is an enlarged schematic view of a portion A of FIG. 1;

FIG. 3 is a schematic view of a portion of the cross-sectional structure A-A of FIG. 1;

FIG. 4 is a schematic diagram of a circuit connection structure of the ring main unit cooling and dehumidifying apparatus of the present invention;

in the figure, 1 ring main unit body, 2 hot air pipe network, 3 hot air pipe, 4 hot air branch pipe, 5 cold air pipe network, 6 cold air pipe, 7 cold air branch pipe, 8 blower, 9 air conditioner, 10 dehumidifier, 11 air outlet component, 12 air outlet pipe, 13 hose, 14 adjusting component, 15 fixing frame, 16 guide rail, 17 rack, 18 driving rod, 19 toothed ring, 20 clamping groove, 21 processor, 22 humidity sensor, 23 temperature sensor, 24 electrical equipment, 25 protecting component, 26 protecting cover plate, 27 support and 28 air outlet.

Detailed Description

In order to better understand the technical content of the invention, specific embodiments are provided below, and the invention is further described with reference to the accompanying drawings.

Example 1

Referring to fig. 1 to 4, the ring main unit cooling and dehumidifying device provided by the present invention includes a ring main unit body 1, a hot air pipe network 2 and a cold air pipe network 5, wherein a circulating fan (not shown) is fixed on the ring main unit body 1, an input end of the hot air pipe network 2 is communicated with an upper portion of the ring main unit body 1, an output end of the hot air pipe network 2 is sequentially communicated with a fan 8, an air conditioner 9 and a dehumidifier 10, an output end of the dehumidifier 10 is communicated with the cold air pipe network 5, an output end of the cold air pipe network 5 is arranged below an inner portion of the ring main unit body 1, the cold air pipe network 5 is communicated with an air outlet assembly 11, an adjusting assembly 14 for adjusting a cold air spraying angle of the air outlet assembly 11 is arranged in the ring main unit body 1, the cold air spraying angle of the air outlet assembly 11 can be adjusted by the adjusting assembly 14, so as to eliminate dead space ventilation in the ring main unit body 1, improve the cooling dehumidification effect of looped netowrk cabinet body 1, the equipment signal output part electricity of installation is connected with treater 21 in the looped netowrk cabinet body 1, the equipment of installation includes humidity transducer 22, temperature sensor 23 and electrical equipment 24 in the looped netowrk cabinet, and the optional HS12P model of humidity transducer 22, the optional PT100 model of temperature sensor 23, humidity transducer 22 and electrical equipment 24's signal output part all with treater 21 electricity is connected, and the optional STC89C51 model of treater 21, wherein electrical equipment 24 includes circuit breaker and isolator etc. and installs in the electrical equipment 24 of looped netowrk cabinet body 1 inside, treater 21 with air conditioner 9, dehumidifier 10 and fan 8 electricity are connected, acquire the operating power of the electrical equipment 24 of installation in the looped netowrk cabinet body 1 to calculate calorific capacity of electrical equipment 24 in the looped netowrk cabinet body 1, be convenient for adjust fan 8, The operating power of air conditioner 9 and dehumidifier 10 reduces the energy consumption, improves cooling dehumidification effect, for avoiding dehumidifier 10 and air conditioner 9 to be drenched by the rainwater, can the outside top of looped netowrk cabinet is fixed with protective assembly 25, protective assembly 25 is including protective cover plate 26 and support 27, the both ends of support 27 respectively with the looped netowrk cabinet with protective cover plate 26 connects.

The device is arranged in front of a ring main unit body 1, the number and the positions of air outlets 28 at the top end of the ring main unit body 1 are firstly determined through numerical simulation calculation by using American Fluent fluid flow calculation software, the air outlets 28 are communicated through a hot air pipe network 2, and the communication between the hot air pipe network 2 and the ring main unit body 1 is realized; calculating and determining the arrangement position of an air outlet of a cold air pipe network 5 at the bottom of the ring main unit body 1, determining the number and the injection angle of air inlets on the cold air pipe network 5, communicating the air outlet assembly 11 with the air inlets, and adjusting the cold air injection angle of the air outlet assembly 11 through an adjusting assembly 14; finally, flow field distribution of gas in the ring main unit is calculated by using Fluent fluid flow calculation software, ventilation dead corners in the ring main unit body 1 are eliminated, and the distribution of the flow field and the temperature field is improved;

the processor 21 is connected with signal output end points of electrical equipment such as a circuit breaker, an isolating switch and the like which are arranged in the ring main unit body 1, obtains the power of the electrical equipment such as the circuit breaker, the isolating switch and the like, calculates the heat productivity through the power, calculates the air quantity required for taking away the heat, determines the size and the power of the fan 8, and determines the power of the air conditioner 9 according to the air quantity and the required temperature drop (the difference value between the existing temperature and the specified temperature);

according to the air humidity in the ring main unit body 1 and the specified humidity required to be reduced, the processor 21 calculates the humidity difference, and then determines the power of the dehumidifier 10 according to the air volume and the required humidity difference.

When the ring main unit is used, the fan 8, the dehumidifier 10 and the air conditioner 9 are started, the working power of the fan 8, the air conditioner 9 and the dehumidifier 10 is calculated according to the steps, the fan 8 sucks hot air in the ring main unit 1 into the hot air pipe network 2 through the air outlet, the hot air is sequentially cooled by the air conditioner 9 and dehumidified by the dehumidifier 10, so that the temperature of the air output by the cold air pipe network 5 is reduced to the operating temperature of electrical equipment 24 in the ring main unit 1, the humidity is reduced to be below 50%, the cooled and dehumidified air is blown into the ring main unit 1 through the air outlet assembly 11, the temperature sensor 23 and the humidity sensor 22 are arranged on the side wall of the ring main unit and are respectively connected with the air conditioner 9 and the dehumidifier 10 through the processor 21, and when the temperature in the ring main unit 1 is reduced to a designated temperature, the air conditioner 9 stops working; when the temperature is higher than the working limit temperature, the air conditioner 9 starts to work; similarly, when the humidity in the ring main unit body 1 is reduced to the designated humidity, the dehumidifier 10 stops working; when the humidity is higher than the working limit humidity, the dehumidifier 10 starts to work, so that the intelligent cooling and dehumidifying effects are achieved; when the temperature is low in winter, the air conditioner 9 and the dehumidifier 10 stop working, and only the fan is left to operate, so that the air in the ring main unit body 1 keeps a circulating state, the cable head and the isolating switch mechanism can be ensured to normally dissipate heat, and the power consumption is saved.

Example 2

Referring to fig. 1 to 3, the present embodiment is different from embodiment 1 in that: the hot air pipe network 2 comprises a hot air pipe 3 and a plurality of hot air branch pipes 4, the input ends of the hot air branch pipes 4 are respectively communicated with the ring main unit through a plurality of air outlets 28, the output ends of the hot air branch pipes 4 are communicated with the hot air pipe 3, the output end of the hot air pipe 3 is communicated with the fan 8, the hot air branch pipes 4 can be communicated with the air outlets 28 arranged on the ring main unit body 1, hot air is cooled through the hot air pipe 3 by an air conditioner 9, the dehumidified hot air is conveyed into the cold air pipe 6 by the dehumidifier 10, wherein the cold air pipe network 5 comprises a cold air pipe 6 and a plurality of cold air branch pipes 7, the input end of the cold air pipe 6 is communicated with the dehumidifier 10, the output end of the cold air pipe 6 is communicated with the cold air branch pipes 7, the cold air branch pipes 7 are communicated with a plurality of air outlet assemblies 11, and cold air can be blown out through the air outlet assemblies 11 after being cooled and dehumidified, adjust temperature and humidity in the looped netowrk cabinet body 1, air-out subassembly 11 is including going out tuber pipe 12 and hose 13, the both ends of hose 13 respectively with cold wind branch pipe 7 and play tuber pipe 12 intercommunication, hose 13 are convenient for adjust the angle of a tuber pipe 12 outputs, and hose 13 can be the bellows.

Example 3

Referring to fig. 1 to 3, the present embodiment is different from embodiment 1 in that: adjusting part 14 includes mount 15, guide rail 16, rack 17 and a plurality of actuating lever 18, mount 15 is fixed in the looped netowrk cabinet body 1, it is a plurality of actuating lever 18 with mount 15 rotates to be connected, rack 17 sliding connection in on the guide rail 16, be close to guide rail 16 one end actuating lever 18 has cup jointed ring gear 19, rack 17 with ring gear 19 meshes, rack 17 is used for driving a plurality of actuating lever 18 rotates, actuating lever 18 and a plurality of it connects to go out tuber pipe 12, one side that goes out tuber pipe 12 is equipped with draw-in groove 20, actuating lever 18 joint in draw-in groove 20, actuating lever 18 passes through draw-in groove 20 with it connects to go out tuber pipe 12.

When the cold air injection angle of the air outlet pipe 12 needs to be adjusted, the rack 17 slides on the guide rail 16, the sliding rack 17 is meshed with the toothed ring 19, the plurality of driving rods 18 can be driven to rotate at the same time, and the rotating driving rods 18 adjust the cold air injection angle of the air outlet pipe 12.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a looped netowrk cabinet cooling dehydrating unit which characterized in that: including looped netowrk cabinet body, hot-blast pipe network and cold wind pipe network, the input of hot-blast pipe network with the upper portion intercommunication of looped netowrk cabinet body, the output of hot-blast pipe network communicates in proper order has fan, air conditioner and dehumidifier, the output of dehumidifier with the cold wind pipe network intercommunication, the output of cold wind pipe network is located the inside below of looped netowrk cabinet body, cold wind pipe network intercommunication has the air-out subassembly, this internal being equipped with of looped netowrk cabinet is used for adjusting the cold wind jet angle's of air-out subassembly adjusting part, the equipment signal output electricity of this internal installation of looped netowrk cabinet is connected with the treater, the treater with air conditioner, dehumidifier and fan electricity are connected.

2. The ring main unit cooling and dehumidifying device of claim 1, wherein: the equipment of installation includes humidity transducer, temperature sensor and electrical equipment in the looped netowrk cabinet, temperature sensor, humidity transducer and electrical equipment's signal output part all with the treater electricity is connected.

3. The ring main unit cooling and dehumidifying device of claim 1, wherein: the protection component is fixed on the top end of the outer portion of the ring main unit and comprises a protection cover plate and a support, and two ends of the support are connected with the ring main unit and the protection cover plate respectively.

4. The ring main unit cooling and dehumidifying device of claim 1, wherein: the hot air pipe network comprises a hot air guide pipe and a plurality of hot air branch pipes, the input ends of the hot air branch pipes are communicated with the ring main unit through a plurality of air outlets respectively, the output ends of the hot air branch pipes are communicated with the hot air guide pipe, and the output ends of the hot air guide pipe are communicated with the fan.

5. The ring main unit cooling and dehumidifying device of claim 1, wherein: the cold air pipe network comprises a cold air guide pipe and a plurality of cold air branch pipes, the input end of the cold air guide pipe is communicated with the dehumidifier, the output end of the cold air guide pipe is communicated with the cold air branch pipes, and the cold air branch pipes are communicated with the air outlet assemblies.

6. The ring main unit cooling and dehumidifying device of claim 5, wherein: the air outlet assembly comprises an air outlet pipe and a hose, and two ends of the hose are communicated with the cold air branch pipe and the air outlet pipe respectively.

7. The ring main unit cooling and dehumidifying device of claim 6, wherein: the adjusting part comprises a fixing frame, a guide rail, a rack and a plurality of driving rods, wherein the fixing frame is fixed in the ring main unit body, the driving rods are connected with the fixing frame in a rotating mode, the rack is connected to the guide rail in a sliding mode and used for driving the driving rods to rotate, and the driving rods are connected with the air outlet pipes.

8. The ring main unit cooling and dehumidifying device of claim 6, wherein: the driving rod close to one end of the guide rail is sleeved with a toothed ring, and the rack is meshed with the toothed ring.

9. The ring main unit cooling and dehumidifying device of claim 6, wherein: one side of going out the tuber pipe is equipped with the draw-in groove, the actuating lever joint in the draw-in groove, the actuating lever passes through the draw-in groove with go out the tuber pipe and connect.