CN218896963U - Condensation protection device for high-voltage switch - Google Patents

Abstract

The utility model relates to a high-voltage switch condensation protection device, which comprises an air compressor and a compressed air dryer, wherein a dew point sensor and a wind pressure sensor are arranged in a cabinet body, an oil filter, a water filter and a particle filter are sequentially arranged on a pipeline between an air outlet end of the air compressor and an air inlet end of the compressed air dryer, one end of a compressed air pipe is connected with the air outlet end of the compressed air dryer, and the other end of the compressed air pipe extends into the cabinet body and is paved along the inner wall of the cabinet body; the compressed air pipe is provided with a plurality of air nozzles at the part in the cabinet body. The utility model has the advantages that: as long as the dew point temperature sensor arranged in the cabinet body reads the temperature to be reached to the condensation, the dry compressed air is controlled to enter and adsorb moisture, so that automatic control can be realized, and in addition, when the air humidity and the temperature in the natural environment do not meet the condensation condition, the dry compressed air does not need to enter, and the energy sources and the like are saved.

Description

Condensation protection device for high-voltage switch

Technical Field

The utility model relates to a condensation protection device for a high-voltage switch, and belongs to the field of operation protection of high-voltage switches.

Background

In electric power distribution looped netowrk cabinet and the metal enclosed armoured high-voltage board body, main electrical components all have independent isolation room, and the isolation room is separated by the metal baffle of ground connection, seals completely, mainly has circuit breaker handcart room, cable room, bus-bar room, relay instrument room etc.. In the process of putting the equipment into operation, a large amount of heat can be generated in the equipment, the heat cannot be timely dissipated due to the sealing of the periphery, and the performance of insulating materials such as a circuit breaker handcart, a contact box, a sleeve, a heat shrinkage pipe and the like can be seriously affected after the heat is too high, so that the service life of the equipment is shortened; in addition, when the temperature difference is large, particularly when the temperature difference is alternating in spring, summer and autumn and winter, the humidity in the air, particularly the humidity in the cable duct (even water accumulation exists in the cable duct), the water drops are extremely easy to condense in the cabinet due to the fact that the ambient temperature is about 0-4 ℃, the water drops are attached to the insulating material, the discharge and flashover phenomena are easily formed, the conditions of tripping, power failure and the like are extremely easily caused, corrosion is also caused for a long time, the aging of the insulating material is accelerated, and potential safety hazards are brought.

The existing solutions and the equipment used are basically of the following types:

1. the intelligent semiconductor dehumidification method utilizes the characteristics of semiconductors, heats or condenses moist air, and absorbs moisture in the air. The method can solve a part of problems, but has large power consumption, the device has large volume to absorb a large amount of moisture, but has large volume, the switch chamber has no installation space, and only can be used as small-sized equipment, so that the problems can not be fundamentally solved.

2. The dampproof plugging agent is used for plugging all channels between the switch chamber and the outside by some switch manufacturing enterprises, on one hand, absolute plugging is impossible, and on the other hand, the dampproof plugging agent cannot play a role in moist air in the switch.

3. Industrial dehumidifier method: this method is similar to the semiconductor dehumidification method, and has the problems of slow moisture absorption and space when the moisture in the switch chamber is sucked out or the dehumidifier is placed in the switch.

4. Most supporting merchants design intelligent humidity temperature controller to install in the switch, reach the protection purpose through temperature and humidity in the control switch, and the temperature regulation has heating and cooling, needs not only power consumption is big to the processing apparatus of the indoor part heating of switch or cooling, and the volume is also big just can satisfy the wide temperature adjustment in space, and equipment is complicated, and the cost is also high.

5. The water absorbing material is added in the switch chamber, the purpose can be achieved in a certain time from the aspect of the method, but when the water absorbing material is saturated, once saturated, the water absorbing material has a reaction under the action of temperature, so that the water absorbing material is not suitable for effectively solving the problem for a long time.

6. The dry air purging method has the advantages that the dry air is adopted to purge the cable trench at present, so that a large amount of water which is easy to accumulate is removed, but the problem in the switch is not thoroughly solved.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a high-voltage switch condensation protection device, which has the following technical scheme:

the utility model provides a high tension switch condensation protector, includes air compressor and compressed air dryer, installs dew point sensor and wind pressure sensor in the inside of cabinet body, installs oil filter, moisture filter and particulate filter on the pipeline between this air compressor's the end of giving vent to anger and the inlet end of compressed air dryer in proper order, and the one end of compressed air pipe inserts the end of giving vent to anger of compressed air dryer, and the other end of this compressed air pipe extends to the inside of cabinet body and lays along the inner wall of cabinet body behind; the compressed air pipe is provided with a plurality of air nozzles at the part in the cabinet body, and the air compressor, the compressed air dryer, the dew point sensor and the wind pressure sensor are all connected to the control system.

The pipe diameter of the compressed air pipe is 6-8mm.

The dew point sensor and the wind pressure sensor are positioned in the cabinet body.

The compressed air pipe is arranged between the inner frame of the cabinet body and the gap of the cabinet body.

The utility model has the advantages that:

1. as long as the dew point temperature sensor arranged in the cabinet body reads the temperature to be reached to the condensation, the dry compressed air is controlled to enter and adsorb moisture, so that automatic control can be realized, and in addition, when the air humidity and the temperature in the natural environment do not meet the condensation condition, the dry compressed air does not need to enter, so that the energy is saved.

2. The air pressure sensor ensures that the dry compressed air entering the inside of the switch keeps micro positive pressure, ensures that the compressed air absorbing moisture can be smoothly discharged outside the switch on the one hand, and simultaneously prevents moisture outside the cabinet body from entering the cabinet body through the wiring hole or the gap. On the other hand, the electrical appliance in the switch is ensured to be protected from performance changes possibly caused by overvoltage.

3. The dew point sensor and the wind pressure sensor are conveniently installed in the high-voltage switch, the switch space is not affected, additional power supply is not needed, the sensor signal line is only required to pass in and out through the switch control line hole, and the switch is not required to be modified.

4. The compressed air pipe with the circumference of 6-8mm is arranged in the cabinet body very conveniently, can be paved between gaps of electrical elements, is flexible, is bent freely, and can be paved at any corner in the cabinet body. The switch can be completed through a spare wiring port or a cable in-out space, and the cabinet body does not need to be modified. Thus, the problem of humidity is solved in all directions in the place where the interior of the cabinet body is difficult to purge is solved simultaneously by the pipe arrangement.

Drawings

Fig. 1 is a schematic diagram of the main structure of the present utility model.

Detailed Description

The utility model will be further described with reference to specific embodiments, and advantages and features of the utility model will become apparent from the description. These examples are merely exemplary and do not limit the scope of the utility model in any way. It will be understood by those skilled in the art that various changes and substitutions of details and forms of the technical solution of the present utility model may be made without departing from the spirit and scope of the present utility model, but these changes and substitutions fall within the scope of the present utility model.

Referring to fig. 1, the utility model relates to a high-voltage switch condensation protection device, which comprises an air compressor 8 and a compressed air dryer 9, wherein a dew point sensor 4 and an air pressure sensor 5 are arranged in a cabinet body 6, and the dew point sensor 4 and the air pressure sensor 5 are positioned in the cabinet body; an oil filter, a water filter and a particle filter are sequentially arranged on a pipeline between the air outlet end of the air compressor 8 and the air inlet end of the compressed air dryer 9, one end of a compressed air pipe 7 is connected to the air outlet end of the compressed air dryer 9, and the other end of the compressed air pipe 7 extends into the cabinet 6 and is paved along the inner wall of the cabinet 6; the part of the compressed air pipe 7 positioned in the cabinet body 6 is provided with a plurality of air nozzles, and the air compressor 8, the compressed air dryer 9, the dew point sensor 4 and the air pressure sensor 5 are all connected into a control system.

The pipe diameter of the compressed air pipe is 6-8mm.

The compressed air pipe 7 is arranged between the inner frame of the cabinet body 6 and the gap of the cabinet body.

The working principle of the utility model is as follows:

the cabinet body is generally installed on cable pit 1, and cable inlet end 2 and outlet end 3 are laid through the cable pit and are got into the cabinet body, and the business turn over line hole hardly accomplishes absolute sealedly, and moisture in the cable pit can get into the cubical switchboard along with temperature variation, also with the air contact in the cubical switchboard, when the air that contains steam reaches the temperature of dewfall at the temperature, the steam in the cubical switchboard will dewfall and adhere to the surface of electrical apparatus, causes the potential safety hazard to high tension switchgear operation. The air compressor is used for manufacturing compressed air; the oil filter is used for filtering oil in the compressed air; the moisture filter is used for filtering moisture in the compressed air; the particle filter is used for filtering particle dust in the compressed air.

The compressed air dryer is used for manufacturing dry compressed air; the control system is used for controlling the starting and stopping of the device, the pressure in the high-voltage switch and the dew point temperature; the compressed air inlet pipe is used for conveying dry airEntering a cabinet body; the nozzles arranged in the cabinet body purge dry air into all the spaces in the cabinet body; the dew point temperature sensor is used for measuring the dew point temperature in the cabinet body, transmitting a signal to the control system, and the control system sends out a purging and drying air instruction. The wind pressure sensor is used for measuring the wind pressure in the cabinet body and transmitting a signal to the control system, and the control system sends a wind pressure control instruction, the wind pressure is higher than a set value, and the air inflow is automatically adjusted and reduced. The air pressure is lower than the set value, the automatic adjustment increases the air inflow, and the air pressure in the cabinet body is slightly higher than the atmospheric pressure of the instruction under the working state of the device all the time, so that the compressed air absorbing moisture in the cabinet body flows outside the cabinet body, and the moist air outside the cabinet body is prevented from flowing inside the cabinet body. The proposal adopts an oilless air compressor to naturally suck in the ambient air to raise the air pressure to 7-8 kg/cm ² The oil filter thoroughly removes oil, the water filter pretreats water in the air, the particle filter filters dust and solid impurities possibly generated in the air and the operation of the compressor, the impurities are prevented from entering the cabinet body to cause damage to equipment in the cabinet body, the filtered compressed air is sent to the ultralow dew point compressed air dryer to be dried, the dew point temperature of the compressed air after being dried is between minus 40 ℃ and minus 60 ℃, the water content of the compressed air in the dew point temperature range is between about 50ppm and 15ppm, the very dry compressed air can quickly adsorb the water in the air with high humidity in the switch, the ambient humidity in the cabinet body can be quickly reduced, the dried compressed air can also quickly adsorb the water attached to the surface of an electric appliance, and the condensate can be adsorbed and de-exposed by the dry compressed air even if the condensate is generated on the surface of the electric appliance. The safe operation of the high-voltage cabinet body is protected.

The air source is configured in such a way that: 1) The compressed air is easy to realize, the energy consumption is very low, the cost of the air compressor is low, a certain amount of compressed air can be stored, and the response is very fast. 2) The filter is a universal piece, can be purchased at any time and has long service life; 3) The ultra-low dew point compressed air dryer adopts the molecular sieve which absorbs water in an ultra-strong way, has large water absorption capacity and high speed, and the desiccant is the regenerated molecular sieve, so that the service life is as long as 5 years, and the running cost is extremely low. 4) The gas production amount of the air compressor and the ultra-low dew point compressed air dryer can be matched and selected according to the size and the quantity of the cabinet body on site. 5) The air source part has small volume and low energy consumption, only needs the energy consumption of the air compressor, is convenient for switch users in various occasions to install and use, has no special requirement on the environment, and can be used for preventing rain.

The utility model can be obtained from the analysis of the defects of the condensation reasons and the solving methods of the existing switch: 1) The reason of the condensation of the high-voltage switch is mainly that the switch room operates in an environment state, no matter in which season the air has certain humidity in the environment state, the season with larger humidity is the daytime high temperature of the spring and summer juncture and the daytime high temperature of the autumn and winter juncture, and the moisture condensation caused by the larger temperature difference of the low temperature at night can solve the damage of the humidity to the safe operation of the switch as long as the humidity in the high-voltage switch operating environment is solved. 2) The switch environment affected by humidity is mainly inside the cabinet body, and the safety operation of the switch can be protected as long as the humidity environment inside the switch is solved. 3) The method can eliminate the influence of condensation caused by humidity and temperature difference on the safe operation of the high-voltage switch so as to achieve the aim of the utility model as long as the humidity in the air inside the high-voltage switch is removed mostly, and the moist air outside the switch can not enter the switch.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (4)

1. The high-voltage switch condensation protection device is characterized by comprising an air compressor and a compressed air dryer, wherein a dew point sensor and a wind pressure sensor are arranged in a cabinet body, an oil filter, a water filter and a particle filter are sequentially arranged on a pipeline between an air outlet end of the air compressor and an air inlet end of the compressed air dryer, one end of a compressed air pipe is connected with the air outlet end of the compressed air dryer, and the other end of the compressed air pipe extends into the cabinet body and is paved along the inner wall of the cabinet body; the compressed air pipe is provided with a plurality of air nozzles at the part in the cabinet body, and the air compressor, the compressed air dryer, the dew point sensor and the wind pressure sensor are all connected to the control system.

2. The high voltage switch condensation protection apparatus according to claim 1, wherein the pipe diameter of the compressed air pipe is 6-8mm.

3. The high voltage switch condensation protection apparatus according to claim 1 or 2, wherein the dew point sensor and the wind pressure sensor are located inside the cabinet.

4. The high voltage switch condensation protection apparatus according to claim 3, wherein the compressed air pipe is disposed between the inner frame of the cabinet body and the space of the cabinet body.

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