CN217768063U

CN217768063U - Respirator for transformer

Info

Publication number: CN217768063U
Application number: CN202221814330.0U
Authority: CN
Inventors: 陈向全; 蔡皓杰; 吴彦; 曹立爽; 郑晓玲; 冉峰旭; 黄松渝; 李金燐; 曾彦超; 董玮; 肖宇; 孙再峰; 林春江; 陈卉聪; 梁涛
Original assignee: Shibei Power Supply Branch Of State Grid Chongqing Electric Power Co; State Grid Corp of China SGCC
Current assignee: Shibei Power Supply Branch Of State Grid Chongqing Electric Power Co; State Grid Corp of China SGCC
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2022-11-08
Anticipated expiration: 2032-07-13

Abstract

The utility model provides a respirator for transformer, including the casing that is used for holding the dress drier, the casing upper end communicates with each other with the external world, the casing bottom communicates with each other through breathing channel and transformer conservator, the casing is connected with and is used for carrying out dry stoving mechanism to the desicator, and stoving mechanism is used for drying the regeneration and can also cool off simultaneously to the drier in the casing, avoids the drier after the heating direct with the external air contact who contains the hydrone to lead to the problem that the drier explodes easily and splits and produce the little powder, can effectively ensure the long-time use of drier, avoids shutting down the maintenance that changes the drier and lead to loaded down with trivial details, the problem that maintenance intensity is big.

Description

Respirator for transformer

Technical Field

The utility model relates to a transformer technical field, in particular to respirator for transformer.

Background

The transformer breather is also called as a transformer moisture absorber, or a transformer silica gel tank and a transformer desiccant, and has the functions of absorbing moisture in air entering an oil conservator rubber bag and a diaphragm, and removing and drying sundries and moisture in air entering an oil conservator of a transformer (or a mutual inductor) due to the change of the temperature of the transformer oil so as to prevent the transformer from being wetted and ensure the insulating strength of the transformer oil. When the transformer is heated and expanded, the redundant air in the transformer is exhaled; when the transformer oil temperature is reduced and contracted, outside air is sucked. When outside air is inhaled, the silica gel in the respirator filters water molecules in the outside air so as to prevent the transformer oil from being influenced by moisture in the outside air.

The main component of silica gel in the respirator is activated alumina, which belongs to a drying agent, the color of the silica gel is blue under the normal dry state, after the silica gel in the respirator becomes damp due to long-term moisture absorption, the color of the silica gel can be changed (becomes red), the water absorption of the silica gel after being damped and becomes red is reduced, in order to avoid the transformer from sucking damp air, maintenance and inspection personnel find that the silica gel becomes red in the inspection process, the silica gel needs to be replaced in time, the respirator needs to be disassembled after the transformer is shut down during replacement, the normal work of the transformer is influenced, the consumption of a large amount of manpower and materials can be caused, and the waste is serious.

In order to solve the above problems, for example, patent No. CN202011007650.0, entitled a ventilator for transformer discloses a ventilator in which an electric heating element is provided in the ventilator, and the electric heating element is used for heating silica gel in the ventilator, thereby realizing reuse of silica gel, reducing the number of times of disassembly and maintenance of the ventilator, and reducing waste of manpower and materials.

However, since the respirator described in the above patent does not have enough cooling time after the electric heating element heats and dehumidifies the silica gel, after the silica gel is dried, the air inlet channel of the housing is opened to communicate the silica gel with the outside, and the heated silica gel has a high temperature and is directly communicated with the outside, and the introduction of cold air into the housing contacts with the silica gel to crack silica gel particles, so that small powder is easily generated to block the breathing channel of the respirator for a long time, which affects the use of the transformer conservator.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to exist not enough among the prior art, the utility model provides a respirator for transformer has solved among the prior art high temperature silica gel after the drying direct with the outside wet air contact of low temperature explode easily and split the problem that produces little powder and lead to breathing passage to block up.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a breather for a transformer comprises a shell for containing a drying agent, wherein the upper end of the shell is communicated with the outside, the bottom of the shell is communicated with a transformer conservator through a breathing channel, the shell is connected with a drying mechanism for drying the dryer,

the drying mechanism comprises an additional chamber, a fan, a heater, a temperature and humidity sensor and a controller which are arranged at the upper end of the shell,

the additional chamber is filled with drying agent, the upper part of the additional chamber is provided with an air duct communicated with the outside, the lower part of the additional chamber is connected with the air inlet end of the fan through a connecting pipe, wherein the air duct is provided with a first electromagnetic valve, the connecting pipe is provided with a second electromagnetic valve,

the air inlet end of the fan is communicated with an air inlet pipe with a third electromagnetic valve, the air outlet end of the fan is respectively communicated with a cold air pipe with a fourth electromagnetic valve and a hot air pipe with a fifth electromagnetic valve, the cold air pipe is communicated with the lower part of the shell, the hot air pipe is communicated with a heater, the heater is communicated with the lower part of the shell,

the controller is in telecommunication communication with the fan, the heater, the temperature and humidity sensor, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve.

The principle of the utility model is as follows: when the transformer is normally used, the drying agent in the shell is used for absorbing water molecules in the outside air, so that the water molecules are prevented from entering the transformer conservator and affecting the use of the transformer; after the drying agent is used for a period of time, when the drying agent in the shell is saturated in water and can not absorb water molecules in the outside air again, the controller controls the conduction of the air inlet pipe and the conduction of the hot air pipe, and simultaneously controls the work of the fan and the heater, so that the fan guides the outside air into the heater, the heater heats the outside air by adopting heating means such as electric heating and the like, and the heated air enters the shell to dry and regenerate the drying agent in the shell; when the signal detected by the temperature and humidity sensor is fed back to a preset value (the humidity is reduced to a stable value), the drying agent in the shell is proved to be basically dried and regenerated; at the moment, the controller controls the air guide pipe to be conducted, the connecting pipe to be conducted, the cold air pipe to be conducted, the air inlet pipe to be closed, the hot air pipe to be closed and the heater to be closed, the fan works to dehumidify the outside cold air firstly through the drying agent in the additional chamber, then the cold air is guided into the leading-in shell through the cold air pipe to cool the drying agent at high temperature in the shell, and when the temperature and humidity sensor detects that the temperature of the guided air is a preset value (the temperature is lowered to a steady value), the controller controls the cold air pipe, the air guide pipe and the connecting pipe to be closed and controls the fan to stop working; the desiccant in the housing is subjected to the next usage cycle.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses the respirator that sets up can be to drying agent heating regeneration in the casing, can also cool off the desicator after regeneration fast simultaneously, and the direct air contact who contains the hydrone that leads to the drying agent after avoiding heating explodes the problem that produces little powder easily with external drying agent, can effectively ensure the long-time use of drying agent, avoids shutting down the maintenance loaded down with trivial details, the big problem of maintenance intensity that changes the drying agent and lead to.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a housing; 2. a transformer conservator; 3. a heater; 4. a hot air pipe; 41. a fifth solenoid valve; 5. a fan; 6. an air inlet pipe; 61. a third electromagnetic valve; 7. a connecting pipe; 71. a second solenoid valve; 9. a cold air pipe; 81. a fourth solenoid valve; 10. a desiccant; 12. screening a screen; 13. a discharge duct; 131. a duct cover; 14. a stirring shaft; 15. a stirring rod; 16. an air duct; 161. a first solenoid valve; 17. a servo motor; 18. a feed conduit; 181. sealing the cover; 19. a circulation pipe; 191. a seventh electromagnetic valve; 20. an exhaust pipe; 201. a sixth electromagnetic valve; 21. a controller; 11. an additional chamber.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

As shown in FIG. 1, the embodiment of the utility model provides a respirator for transformer, including the casing 1 that is used for holding dress drier 10, casing 1 upper end communicates with each other with the external world, casing 1 bottom communicates with each other with transformer conservator 2 through breathing passage, casing 1 is connected with and is used for carrying out the dry stoving mechanism to the desicator. The desiccant 10 is allochroic silica gel desiccant 10 particles, the moisture degree of the allochroic silica gel desiccant can be judged according to the color change condition of the allochroic silica gel desiccant, and the allochroic silica gel desiccant can recover the water absorption capacity after drying and dehumidification. When the respirator was normally used, the influence of external hydrone was avoided in could getting into transformer conservator 2 after the silica gel dehumidification in the external air process casing 1 was handled, need regenerate silica gel drier 10 after using a period, need cooperate this moment the utility model discloses the stoving mechanism that sets up carries out drying process. Since the dehumidification time of the preset amount of silica gel particles contained in the housing 1 is usually three months, the drying mechanism can be started to dry and regenerate the drying agent 10 in the housing 1 at a preset drying frequency (1 month/time).

As shown in fig. 1, in order to achieve the above object, the utility model discloses the stoving mechanism that sets up includes additional room 11, fan 5, heater 3, sets up temperature and humidity sensor and controller 21 in casing 1 upper end, additional room 11 intussuseption is filled with drier 10, additional room 11 upper portion is equipped with the communicating air duct 16 in the external world, additional room 11 lower part is connected with fan 5 air inlet end through connecting pipe 7, wherein, be equipped with first solenoid valve 161 on the air duct 16, be equipped with second solenoid valve 71 on the connecting pipe 7, the air inlet end intercommunication of fan 5 has the air-supply line 6 of taking third solenoid valve 61, the air-out end of fan 5 communicates respectively has the cold-air duct 9 of taking fourth solenoid valve 81 and the hot-air duct 4 of taking fifth solenoid valve 41, cold-air duct 9 communicates with each other with casing 1 lower part, hot-air duct 4 communicates with each other with heater 3, heater 3 communicates with each other with casing 1 lower part, controller 21 communicates with each other with fan 5, heater 3, temperature and humidity sensor, first solenoid valve 161, second solenoid valve 71, third solenoid valve 61, fourth solenoid valve 61 and fourth solenoid valve 41 and fifth solenoid valve 41 communicate with each other. The controller 21, the additional chamber 11, the heater 3 and the fan 5 are all arranged outside the casing 1 and can be connected with the casing 1 through a connecting frame or fixed at the installation position of the transformer, as long as the above components can achieve corresponding effects.

As shown in fig. 1, the controller 21 works once a week or a month to drive the drying mechanism to dry and regenerate the drying agent 10 in the casing 1; when the drying mechanism is used: the controller 21 controls the conduction of the air inlet pipe 6 and the conduction of the hot air pipe 4, and simultaneously controls the operation of the fan 5 and the heater 3, so that the fan 5 introduces the outside air into the heater 3, the heater 3 adopts heating means such as electric heating to heat the outside air, and the heated air enters the shell 1 to dry and regenerate the drying agent 10 in the shell 1; when the signal detected by the temperature and humidity sensor is fed back to a preset value (the humidity is reduced to a stable value), the drying agent 10 in the shell 1 is proved to be basically dried and regenerated; at this time, the controller 21 controls the air duct 16 to be conducted, the connecting pipe 7 to be conducted, the cold air duct 9 to be conducted, the air inlet pipe 6 to be closed, the hot air duct 4 to be closed and the heater 3 to be closed, so that the fan 5 works to dehumidify the outside cold air firstly through the drying agent 10 in the additional chamber 11, then the cold air is guided into the shell 1 through the cold air duct 9 to cool the drying agent 10 at high temperature in the shell 1, and when the temperature and humidity sensor detects that the temperature of the guided air is a preset value (the temperature is lowered to a steady value), the controller 21 controls the cold air duct 9, the air duct 16 and the connecting pipe 7 to be closed and controls the fan 5 to stop working; the desiccant 10 in the housing 1 is subjected to the next cycle of use.

The utility model discloses the respirator that sets up can be to 10 heating regeneration of drier in the casing 1, can also be to the quick cooling of desicator after regenerating simultaneously, and the drier 10 after avoiding heating is direct to lead to the problem that drier 10 explodes easily and splits the production little powder with the air contact that contains the hydrone outside, can effectively ensure the long-time use of drier 10, avoids shutting down the maintenance that changes drier 10 and leads to loaded down with trivial details, the big problem of maintenance intensity.

As shown in fig. 1, the desiccant 10 in the additional chamber 11 is also discolored silica gel particles, but if the desiccant 10 in the additional chamber 11 is not regenerated during use, the desiccant 10 in the additional chamber 11 needs to be replaced after a certain period of time, otherwise when the desiccant 10 in the additional chamber 11 is saturated by adsorption, the external air cannot be dehumidified and directly introduced into the desiccant 10 in the casing 1 with higher temperature, and the desiccant 10 in the casing 1 can burst. Therefore, in order to avoid this problem, the drying agent 10 in the casing 1 can regenerate the drying agent 10 in the additional chamber 11 during the regeneration process, the casing 1 is communicated with the outside through the exhaust pipe 20 with the sixth electromagnetic valve 201, the upper part of the casing 1 is communicated with the lower part of the additional chamber 11 through the circulation pipe 19 with the seventh electromagnetic valve 191, and the sixth electromagnetic valve 201 and the seventh electromagnetic valve 191 are communicated with the controller 21. The exhaust pipe 20 is a branch structure of the circulation pipe 19, and the temperature and humidity sensor is disposed at the air inlet end of the circulation pipe 19.

As shown in fig. 1, when the desiccant 10 in the housing 1 is regenerated "in series" with the desiccant 10 in the additional chamber 11: the controller 21 controls the conduction of the air inlet pipe 6, the conduction of the hot air pipe 4, the conduction of the air guide pipe, the conduction of the circulating pipe 19 and the closing of the exhaust pipe 20, and simultaneously controls the fan 5 and the heater 3 to work, so that the fan 5 guides outside air into the heater 3, the heater 3 heats the outside air by adopting heating means such as electric heating and the like, and the heated air enters the shell 1 to dry and regenerate the drying agent 10 in the shell 1; the hot air passing through the casing 1 enters the additional chamber 11 from the circulation pipe 19 to dry the drying agent 10 in the additional chamber 11, and then is guided out of the additional chamber 11 from the air guide pipe 16, so that the simultaneous regeneration of the drying agent 10 in the casing 1 and the drying agent 10 in the additional chamber 11 is completed. When the temperature and humidity sensor detects that the humidity of the circulating pipe 19 reaches a preset value, the controller 21 controls the air guide pipe 16 to be conducted, the connecting pipe 7 to be conducted, the cold air pipe 9 to be conducted, the exhaust pipe 20 to be conducted, the circulating pipe 19 to be closed, the air inlet pipe 6 to be closed, the hot air pipe 4 to be closed and the heater 3 to be closed, the fan 5 works to dehumidify the outside cold air firstly through the drying agent 10 in the additional chamber 11, then the cold air is led into the shell 1 through the cold air pipe 9 to cool the drying agent 10 at high temperature in the shell 1, then the shell is led out of the exhaust pipe 20, and when the temperature and humidity sensor detects that the temperature of the led air is the preset value (the temperature is lowered to a steady value), the controller 21 controls the cold air pipe 9, the air guide pipe 16 and the connecting pipe 7 to be closed, controls the fan 5 to stop working, and the exhaust pipe 20 is continuously opened; the desiccant 10 in the housing 1 is subjected to the next cycle of use.

As shown in figure 1, because the drying agent 10 in the additional chamber 11 can be burst when being in contact with the external moisture-containing air at high temperature, the small powder generated by burst of the particles of the drying agent 10 can be settled, and the drying agent 10 in the additional chamber 11 can be rapidly regenerated and dried conveniently, the stirring mechanism is arranged in the additional chamber 11, and comprises a stirring shaft 14 vertically running through the upper end of the additional chamber 11 and rotatably connected with the top wall of the additional chamber 11, a servo motor 17 connected with the upper end of the stirring shaft 14 and a plurality of stirring rods 15 arranged at the middle lower part of the stirring shaft 14, wherein the servo motor 17 is in telecommunication connection with a controller 21. When the drying agent regeneration device is used, the servo motor 17 is started in the regeneration and cooling processes of the drying agent 10 in the shell 1.

As shown in fig. 1, in order to facilitate the small powder in the additional chamber 11 to collect at the bottom of the additional chamber 11 and reduce the possibility of the small powder entering the blower 5, a screen 12 is installed near the bottom of the additional chamber 11, the desiccant 10 is disposed above the screen 12, and the circulation pipe 19 and the connection pipe 7 are both located above the screen 12. To further prevent the small powder in the additional chamber 11 from entering the connection pipe 7, an intercepting net may be provided at the air inlet end of the connection pipe 7, and the connection pipe 7 may be partially inclined.

As shown in fig. 1, in order to facilitate the replacement of the drying agent 10 in the additional chamber 11 after a certain period of use, the upper part of the additional chamber 11 is provided with a feeding pipe 18 with a cover 181, the lower part of the additional chamber 11 is provided with a discharging pipe 13 for guiding out the drying agent 10, and the discharging pipe 13 is provided with a pipe cover 131 for matching use.

It is worth noting that: the air outlet end of the cold air pipe 9 and the air outlet end of the pipeline connecting the heater 3 and the shell 1 are both provided with intercepting nets for preventing the drying agent 10 in the shell 1 from being introduced, and meanwhile, the air inlet end and the air outlet end of the circulating pipe 19 are also provided with intercepting nets for preventing the drying agent 10 in the shell 1 and the drying agent 10 in the additional chamber 11 from entering the circulating pipe 19.

Finally, it is noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. The utility model provides a respirator for transformer, is including the casing that is used for holding the dress drier, the casing upper end communicates with each other with the external world, the casing bottom communicates with each other its characterized in that through breathing passage and transformer conservator: the shell is connected with a drying mechanism used for drying the dryer,

the air inlet end of the fan is communicated with an air inlet pipe with a third electromagnetic valve, the air outlet end of the fan is respectively communicated with a cold air pipe with a fourth electromagnetic valve and a hot air pipe with a fifth electromagnetic valve, the cold air pipe is communicated with the lower part of the shell, the hot air pipe is communicated with the heater, the heater is communicated with the lower part of the shell,

the controller is communicated with the fan, the heater, the temperature and humidity sensor, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve in a telecommunication mode.

2. The respirator for a transformer according to claim 1, wherein: the shell is communicated with the outside through an exhaust pipe with a sixth electromagnetic valve, the upper part of the shell is communicated with the lower part of the additional chamber through a circulating pipe with a seventh electromagnetic valve, and the sixth electromagnetic valve and the seventh electromagnetic valve are in telecommunication communication with the controller.

3. A respirator for a transformer according to claim 2, wherein: the stirring mechanism is arranged in the additional chamber and comprises a stirring shaft vertically penetrating through the upper end of the additional chamber and rotatably connected with the top wall of the additional chamber, a servo motor connected with the upper end of the stirring shaft and a plurality of stirring rods arranged on the middle lower part of the stirring shaft, wherein the servo motor is in telecommunication connection with the controller.

4. A respirator for a transformer according to claim 3, wherein: the position in the additional chamber close to the bottom of the additional chamber is provided with a screen mesh in an erected mode, the drying agent is arranged above the screen mesh, and the circulating pipe and the connecting pipe are located above the screen mesh.

5. A respirator for a transformer according to any one of claims 1 to 4, wherein: the upper part of the additional chamber is provided with a feeding pipeline with a sealing cover, the lower part of the additional chamber is provided with a discharge pipeline for leading out the drying agent, and the discharge pipeline is provided with a pipeline cover matched with the discharge pipeline.

6. A respirator for a transformer according to any one of claims 1 to 4, wherein: the desiccant comprises a silica gel desiccant.