CN213092996U

CN213092996U - Moisture absorber

Info

Publication number: CN213092996U
Application number: CN202022236467.XU
Authority: CN
Inventors: 唐云雪; 李智; 何爽; 朱宝余; 陈涛; 张赩; 张丹; 孙晔; 孟宪超; 刘森
Original assignee: STATE GRID JILINSHENG ELECTRIC POWER SUPPLY Co ELECTRIC POWER RESEARCH INSTITUTE; State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Jilin Electric Power Co Ltd
Current assignee: STATE GRID JILINSHENG ELECTRIC POWER SUPPLY Co ELECTRIC POWER RESEARCH INSTITUTE; State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Jilin Electric Power Co Ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-04-30
Anticipated expiration: 2030-10-10

Abstract

The utility model provides a moisture absorber, include: the upper flange is used for connecting the filter and the connecting pipe, the connecting pipe is connected with a capsule or a corrugated pipe of the oil conservator, the lower flange is used for connecting the filter and the oil cup, vent holes are respectively formed in the upper flange and the lower flange, and a ball valve is further mounted on the side face of the upper flange; the filter comprises a filter cover and a drying agent loaded in the filter cover, a filling port and a cleaning port are formed in the filter cover, and outlets of the filling port and the cleaning port are respectively sealed through threaded plugs; the oil cup comprises an oil cup inner cover and an oil cup outer cover, the oil cup outer cover is sleeved on the outer side of the oil cup inner cover and filled with transformer oil, the oil cup inner cover is bottomless and is not in contact with the bottom of the oil cup outer cover, an exhaust hole is formed in the position, close to the lower flange, of the oil cup outer cover, and a filter element is installed on the exhaust hole. The utility model discloses effectively prolong the life of drier, make things convenient for the change of drier simultaneously, the maintenance and the maintenance of the equipment of being convenient for.

Description

Moisture absorber

Technical Field

The utility model belongs to the technical field of electrical equipment, especially relate to a desiccator for oil-immersed transformer.

Background

The moisture absorber is also called a breather to be applied to electrical equipment such as a transformer, a reactor and the like, and is widely applied to an oil immersed transformer in particular. The moisture absorber is arranged at the tail end of a pipeline communicated with air of the oil storage cabinet, when the temperature of the transformer rises, oil in the oil tank correspondingly expands, the oil level in the oil storage cabinet correspondingly rises, and at the moment, part of gas in a capsule or a corrugated pipe of the oil storage cabinet is exhausted through the moisture absorber; when the temperature of the transformer is reduced, the oil in the oil tank is correspondingly contracted, so that the oil level in the oil storage cabinet is also correspondingly reduced, and the capsule or the corrugated pipe can suck the outside air through the moisture absorber in the process.

The existing moisture absorber has certain defects in structural design, the exhaust hole of the moisture absorber is directly contacted with air, the external air sucked into the moisture absorber is poor in filtering effect on dust and impurities in the external air only by using an oil seal, meanwhile, the procedure for replacing the drying agent is complicated, and heavy gas protection is usually required to be started and shutdown operation is carried out.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, an object of the present invention is to provide a moisture absorber to effectively prolong the service life of the drying agent, and facilitate the replacement of the drying agent and the maintenance of the device.

The utility model provides a moisture absorber, include: the device comprises a connecting pipe, an upper flange, a filter, a lower flange and an oil cup; one end of the upper flange is connected with the connecting pipe, the other end of the upper flange is hermetically connected with one end of the filter, the other end of the filter is hermetically connected with one end of the lower flange, the other end of the lower flange is hermetically connected with the oil cup, vent holes are respectively formed in the upper flange and the lower flange, and a ball valve is further mounted on the side surface of the upper flange; the filter comprises a filter cover and a drying agent loaded in the filter cover, a filling port and a cleaning port are formed in the filter cover, and outlets of the filling port and the cleaning port are respectively sealed through threaded plugs; the oil cup comprises an oil cup inner cover and an oil cup outer cover, the oil cup outer cover is sleeved on the outer side of the oil cup inner cover and filled with transformer oil, the oil cup inner cover is bottomless and is not in contact with the bottom of the oil cup outer cover, an exhaust hole is formed in the position, close to the lower flange, of the oil cup outer cover, and a filter element is installed on the exhaust hole.

Preferably, the filter also comprises a connecting rod positioned on the filter cover, one end of the connecting rod is fixedly connected with the upper flange, the other end of the connecting rod is connected with the lower flange, the connecting rod is connected with a partition which divides the inner space of the filter cover into different areas, and the filter cover corresponding to each area is provided with a filling port and a cleaning port.

Preferably, both ends of the connecting rod are respectively in threaded connection with the upper flange and the lower flange.

Preferably, an oil level line is carved on the oil cup housing.

Preferably, the filter also comprises a connecting rod positioned on the filter cover, one end of the connecting rod is fixedly connected with the upper flange, the other end of the connecting rod downwards penetrates through the lower flange and then extends into the oil cup outer cover and is connected with an oil level plate, and a gap is formed between the oil level plate and the oil cup inner cover.

Preferably, the filter cover, the oil cup outer cover and the oil cup inner cover are all made of transparent materials.

Preferably, the filter element comprises a double screen and a filter paper sandwiched between the double screen.

Preferably, sealing gaskets are respectively arranged at the joint of the filter cover and the upper flange, the joint of the filter cover and the lower flange and the joint of the oil cup outer cover and the lower flange.

Preferably, the outlet of the filler port is upwardly inclined and the purge port is downwardly inclined.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the added ball valve and the connecting pipe are convenient for timely sealing the air passage during maintenance, and the outside air is prevented from being mixed into the capsule or the corrugated pipe of the oil conservator.

2. The filter core of installation on the exhaust hole can reduce the change frequency of drier when extension oil blanket life.

3. The separated bearing drying agent can increase the types of the drying agents, adjust the using amount, increase the contact area and improve the adsorption efficiency.

4. The desiccant is replaced through the filling port and the cleaning port, the moisture absorber does not need to be integrally detached, and the desiccant is convenient to clean and replace.

Drawings

The invention is further described with reference to the following drawings and detailed description:

fig. 1 is a schematic structural view of a moisture absorber according to an embodiment of the present invention;

fig. 2 is a cross-sectional top view of a dehydrating breather according to an embodiment of the present invention;

fig. 3 is a schematic plan view of a lower flange according to an embodiment of the present invention.

In the figure: 1-connecting pipe, 2-upper flange, 21-vent hole, 3-filter, 31-filter cover, 32-filling port, 33-cleaning port, 34-connecting rod, 35-baffle, 36-desiccant, 4-lower flange, 41-vent hole, 5-oil cup, 51-oil cup inner cover, 52, oil cup outer cover, 53-transformer oil, 54-filter element, 6-ball valve, 7-sealing gasket and 8-oil level plate.

The same reference numbers in all figures indicate similar or corresponding features or functions.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

Example one

As shown in fig. 1-3, a dehydrating breather according to a first embodiment includes: the connecting pipe 1, the upper flange 2, the filter 3, the lower flange 4 and the oil cup 5, wherein the upper flange 2 is used for connecting the filter 3 and the connecting pipe 1, the connecting pipe 1 is fixedly connected with a capsule or a corrugated pipe of the oil conservator, the lower flange 4 is used for connecting the filter 3 and the oil cup 5, and gas in the capsule or the corrugated pipe of the oil conservator is discharged from the moisture absorber after passing through the filter 3 and the oil cup 5.

The filter 3 comprises a filter cover 31 and a drying agent 36 loaded in the filter cover 31, a filling port 32 is formed in the side surface of the filter cover 31 close to the top, a cleaning port 33 is formed in the side surface of the filter cover 31 close to the bottom, the outlet direction of the filling port 32 is inclined upwards and used for filling the drying agent 36 into the filter cover 31, the outlet direction of the cleaning port 33 is inclined downwards and used for pouring the drying agent 36, and the outlets of the filling port 32 and the cleaning port 33 are respectively sealed through threaded plugs. The desiccant 36 is replaced through the filling port 32 and the cleaning port 33, the moisture absorber does not need to be integrally disassembled, and the desiccant 36 is convenient to clean and replace.

The top end of the filter cover 31 is fixedly connected with one end of the upper flange 2, the other end of the upper flange 2 is fixedly connected with one end of the connecting pipe 1, the other end of the connecting pipe 1 is fixedly connected with a capsule or a corrugated pipe of the oil conservator, the bottom end of the filter cover 31 is fixedly connected with one end of the lower flange 4, and the other end of the lower flange 4 is fixedly connected with the oil cup 5.

Sealing gaskets 10 are respectively installed at the connection part of the filter cover 31 and the upper flange 2, the connection part of the filter cover 31 and the lower flange 4, and the connection part of the lower flange 4 and the oil cup 5, and are used for increasing the air tightness of the moisture absorber.

The upper flange 2 is provided with a vent hole 21, the vent hole 21 is used for communicating the oil conservator with the filter 3, and the lower flange 4 is provided with a vent hole 41 used for communicating the filter 3 with the oil cup 5.

Install ball valve 6 at the side at last flange 2 middle part, under the condition of moisture absorber normal work, ball valve 6 is in the open mode, when maintaining the moisture absorber, closes ball valve 6, in time seals the gas circuit, sneaks into the outside air in avoiding the capsule or the bellows of oil conservator.

In a preferred embodiment, the filter 3 further comprises a connecting rod 34, the top end of the connecting rod 34 is fixedly connected with the upper flange 2, and the bottom end of the connecting rod 34 penetrates the lower flange 4 downwards and is connected with the oil level plate 8 positioned in the oil cup 5. Preferably, external threads are formed at both ends of the connecting rod 34, internal threaded holes are formed in the upper flange 2 and the oil level plate 8, and both ends of the connecting rod 34 are respectively in threaded connection with the upper flange 2 and the oil level plate 8.

At least one partition 35 is fixed on the connecting rod 34, the partition 35 is used for dividing the internal space of the filter cover 31 into different areas, the filter cover 31 corresponding to each area is respectively provided with a filling port 32 and a cleaning port 33, so that each area can be independently filled with a drying agent 36, and the drying agent 36 can be allochroic silica gel, anhydrous calcium chloride, activated alumina and the like. The contact area between the drying agent 36 and the gas can be increased through the partition 35, the adsorption efficiency is improved, the types of the drying agents can be increased, the use amount of each drying agent is adjusted, and the drying agents are prevented from being mixed together.

The barrier 35 may be a partition plate or a separation net, and when the barrier 35 is a separation net, the pore size of the separation net is smaller than the diameter of the drying agent 36.

The oil cup 5 comprises an oil cup inner cover 51 and an oil cup outer cover 52, the top ends of the oil cup inner cover 51 and the oil cup outer cover 52 are fixedly connected with the lower flange 4 respectively, the oil cup outer cover 52 is sleeved on the outer side of the oil cup inner cover 51 and is filled with transformer oil 53, the oil cup inner cover 51 is bottomless and is not in contact with the bottom of the oil cup outer cover 52, the transformer oil 53 can enter the oil cup inner cover 51, and the transformer oil 53 is used for oil sealing.

The oil level plate 8 is located at the bottom of the oil cup outer cover 52 and in front of the oil cup inner cover 51 for indicating the oil level of the transformer oil 53 in the oil cup outer cover 52, and the oil cup inner cover 51, the oil cup outer cover 52 and the filter cover 31 are all made of transparent materials (such as transparent glass and the like) so as to facilitate the internal situation to be observed from the outside.

The position of the oil cup outer cover 52 close to the lower flange 4 is provided with an exhaust hole for ventilating with the outside, a filter element 54 is arranged on the exhaust hole, the filter element 54 comprises a double-layer filter screen and filter paper clamped in the middle of the double-layer filter screen, the filter screen and the filter paper can filter dust and impurities in the air in advance when absorbing the outside air, and meanwhile, the filter paper can partially absorb moisture in the air. The filter element 54 can reduce the frequency of replacement of the desiccant 36 while extending the useful life of the transformer oil 53.

The operating principle of the moisture absorber is as follows: when the oil temperature of the transformer rises, the volume expands, the oil level rises, and a capsule or a corrugated pipe of the oil storage cabinet is extruded, and gas in the capsule or the corrugated pipe enters the filter 3 through the connecting pipe 1, passes through the drying agent 36 and the transformer oil 53 and is discharged into the atmosphere through the exhaust hole; when the oil temperature drops, the oil level in the transformer drops, the capsule or the corrugated pipe shrinks, outside air enters the oil cup through the exhaust hole, before entering the oil cup, firstly passes through the filter element 54 to filter impurities such as dust in the air and simultaneously primarily absorb moisture in the air, the air enters the filter cover 31 after passing through the transformer oil 53, and after being effectively dried by the drying agent 36, the clean air enters the oil storage cabinet through the connecting pipe 1, so that the effective operation of the equipment is ensured.

When the drying agent 36 needs to be replaced, the ball valve 6 is closed firstly to isolate the circulation of air inside and outside the oil storage cabinet, then the cleaning port 33 is opened, the drying agent 36 after moisture absorption is poured out, then the cleaning port 33 is closed, the filling port 32 is opened at the same time, and new drying agent 36 is added.

Example two

The difference between the second embodiment and the first embodiment is that the oil level of the transformer oil is indicated in a different manner, and in the second embodiment, two ends of the connecting rod are respectively in threaded connection with the upper flange and the lower flange, that is, the connecting rod does not extend into the oil cup housing and is not connected with the oil level plate, but the outer wall of the oil cup housing is scribed to indicate the oil level of the transformer oil.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A dehydrator breather, comprising: the device comprises a connecting pipe (1), an upper flange (2), a filter (3), a lower flange (4) and an oil cup (5); one end of the upper flange (2) is connected with the connecting pipe (1), the other end of the upper flange (2) is connected with one end of the filter (3) in a sealing manner, the other end of the filter (3) is connected with one end of the lower flange (4) in a sealing manner, the other end of the lower flange (4) is connected with the oil cup (5) in a sealing manner, vent holes (21 and 41) are respectively formed in the upper flange (2) and the lower flange (4), and a ball valve (6) is further mounted on the side surface of the upper flange (2);

the filter (3) comprises a filter cover (31) and a drying agent (36) loaded in the filter cover (31), a filling port (32) and a cleaning port (33) are formed in the filter cover (31), and outlets of the filling port (32) and the cleaning port (33) are respectively sealed through threaded plugs;

oil cup (5) are including oil cup inner cover (51) and oil cup dustcoat (52), oil cup dustcoat (52) cover is in the outside of oil cup inner cover (51) is equipped with transformer oil (53), oil cup inner cover (51) do not have the end and not with the bottom contact of oil cup dustcoat (52) are close to lower flange (4) department has seted up the exhaust hole install filter core (54) on the exhaust hole.

2. A dehydrator breather according to claim 1, wherein the filter (3) further comprises a connecting rod (34) arranged in the filter housing (31), one end of the connecting rod (34) is fixedly connected with the upper flange (2) and the other end is connected with the lower flange (4), a partition (35) for dividing the inner space of the filter housing (31) into different areas is connected to the connecting rod (34), and the filling port (32) and the cleaning port (33) are formed in the filter housing (31) corresponding to each area.

3. A dehydrator breather according to claim 2, wherein the connecting rod (34) is threaded at each end to the upper flange (2) and the lower flange (4).

4. A dehydrator breather according to claim 2, wherein the oil cup housing (52) is scored with an oil line.

5. A dehydrator breather according to claim 1, wherein the filter (3) further comprises a connecting rod (34) located in the filter housing (31), wherein one end of the connecting rod (34) is fixedly connected with the upper flange (2), the other end of the connecting rod passes through the lower flange (4) downwards and then extends into the oil cup housing (52) and is connected with an oil level plate (8), and a gap is formed between the oil level plate (8) and the oil cup inner housing (51).

6. A dehydrator breather according to any of claims 1-5, wherein the filter cover (31), the oil cup outer cover (52) and the oil cup inner cover (51) are all made of transparent material.

7. A dehydrator breather according to claim 1, wherein the filter element (54) comprises a double screen and filter paper sandwiched between the double screen.

8. A dehydrator breather according to claim 1, wherein gaskets (7) are mounted at the connection between the filter cover (31) and the upper flange (2), the connection between the filter cover (31) and the lower flange (4), and the connection between the oil cup housing (52) and the lower flange (4), respectively.

9. A dehydrator breather according to claim 1, wherein the outlet of the fill port (32) is sloped upward and the purge port (33) is sloped downward.