CN210403448U

CN210403448U - Respirator for transformer

Info

Publication number: CN210403448U
Application number: CN201921582900.6U
Authority: CN
Inventors: 吴涛; 夏国华; 吴文胜; 甘权; 程红梅; 何潇
Original assignee: State Grid Corp of China SGCC; Xianning Power Supply Co of State Grid Hubei Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Xianning Power Supply Co of State Grid Hubei Electric Power Co Ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-04-24
Anticipated expiration: 2029-09-23

Abstract

The utility model relates to a breather for a transformer, which comprises a silica gel bottle, an upper cover fixed at the upper end of the silica gel bottle and used for connecting an oil conservator, a lower cover fixed at the lower end of the silica gel bottle and an oil seal cup fixed below the lower cover; the upper cover is provided with a plurality of vertically through vent holes for communicating the oil conservator and the silica gel bottle; the lower cover is provided with a plurality of vertically through oil through holes communicated with the oil seal cup; a hollow breathing tube is vertically arranged in the middle of the silica gel bottle; the upper end of the breathing tube penetrates upwards and is fixed on the upper cover, the lower end of the breathing tube is communicated with a flow guide pipe which inclines downwards, and the tail end of the flow guide pipe penetrates through the side wall of the lower cover and is fixedly connected with a hollow connecting rod; the tail end in the connecting rod is fixed with a one-way valve for preventing outside air from entering; a condensing sheet, a bracket and a heating device which are sequentially fixed on the outer wall of the breathing tube from top to bottom are arranged in the silica gel bottle; the bracket is fixed with a plurality of sensors for detecting temperature and humidity.

Description

Respirator for transformer

Technical Field

The utility model relates to a respirator for transformer belongs to power equipment technical field.

Background

The breather for the transformer is an essential part on transformer equipment, and mainly has the functions of filtering and absorbing moisture and impurities in air entering the transformer, so that the quality of transformer oil is ensured; the respirator structure for the current transformer mainly comprises a shell, wherein a allochroic silica gel adsorbent is arranged in the shell, a connecting flange is arranged at the top of the shell, and a gas filtering device for filtering gas entering an inner cavity of the shell from the outside is arranged at the bottom of the shell.

The prior respirator has the following problems:

1. when the silica gel used for storing water reaches a certain amount, the water absorption effect of the silica gel is gradually weakened until the silica gel disappears, and the color-changing silica gel adsorbent needs to be replaced by a worker. Ideally, the changed allochroic silica gel adsorbent needs to be dried and then reused. However, due to the fact that labor cost for assembling and disassembling the respirator is high, and the performance of the allochroic silica gel adsorbent is reduced after the respirator is used, the allochroic silica gel adsorbent is generally not used again under comprehensive consideration, so that the utilization rate of silica gel is low, and use and maintenance cost is high.

2. The oil seal cup prevents dust from entering through the bottom oil collecting box, but needs to be cleaned regularly, and if the cleaning is not thorough, a breathing passage is blocked, so that the operation failure of the transformer is caused; the silica gel is not replaced regularly, so that the silica gel is supersaturated in water and finally breaks, broken powder possibly causes the respirator hole to be blocked, and potential safety hazard exists.

3. The allochroic silicagel adsorbent is toxic in chemical components, and at present, part of units do not uniformly and intensively treat the waste allochroic silicagel, so that the potential hazard of great environmental pollution exists.

4. Although the respirator is simple in overall structure and few in dismounting procedures, the respirator is high in sealing performance, the transformer is generally located at a position higher than the ground, the dismounting procedures of the respirator are few, the dismounting requirements are extremely high, the dismounting workers waste time and labor, and the like, and the respirator is often scrapped.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problem, the utility model provides a respirator for transformer makes under the silica gel granule assurance in the respirator does not destroy respiratory function's the prerequisite, dehumidifies as required automatically.

The technical scheme of the utility model as follows:

a breather for a transformer comprises a silica gel bottle, an upper cover which is fixed at the upper end of the silica gel bottle and is used for connecting an oil conservator, a lower cover which is fixed at the lower end of the silica gel bottle and an oil seal cup which is fixed below the lower cover; the upper cover is provided with a plurality of vertically through vent holes for communicating the oil conservator and the silica gel bottle; the lower cover is provided with a plurality of vertically through oil through holes communicated with the oil seal cup; a hollow breathing tube is vertically arranged in the middle of the silica gel bottle; the upper end of the breathing tube penetrates upwards and is fixed on the upper cover, the lower end of the breathing tube is communicated with a flow guide pipe which inclines downwards, and the tail end of the flow guide pipe penetrates through the side wall of the lower cover and is fixedly connected with a hollow connecting rod; the tail end in the connecting rod is fixedly provided with a one-way valve for preventing outside air from entering; a condensing sheet, a bracket and a heating device which are sequentially fixed on the outer wall of the breathing tube from top to bottom are arranged in the silica gel bottle; a plurality of sensors for detecting temperature and humidity are fixed on the bracket; the sensor and the heating device are in electric signal connection with a controller fixed on the outer wall of the lower cover; the silica gel bottle is filled with silica gel adsorbent, and the height of silica gel adsorbent is lower than the height of support.

Furthermore, the condensing sheet comprises a radiating fin, two heat insulation sheets respectively fixed at the upper end and the lower end of the radiating fin, and a plurality of hollow refrigerating pieces vertically penetrating through the radiating fin and the heat insulation sheets.

Further, a guide plate is arranged in the silica gel bottle and fixed on the outer wall of the breathing tube; the guide plate is of an inverted umbrella-shaped structure; the baffle is positioned between the condensation sheet and the bracket; the upper end of the guide plate is tightly attached to the lower end of the outer wall of the condensing sheet; the breathing tube is provided with a plurality of leading-in holes, and the lower ends of the leading-in holes are arranged close to the lower part of the guide plate; the breathing pipe is also provided with a plurality of discharge holes, and the discharge holes are positioned between the heating device and the bracket.

Furthermore, a condensing cap is fixedly sleeved at the upper end of the refrigerating piece; the gas condensation cap comprises a clamping part and a conical cap, wherein the lower end of the clamping part is sleeved on the inner side of the upper end of the refrigeration piece; and a plurality of through exhaust holes are uniformly formed in the side wall of the clamping part.

Furthermore, the oil seal cup is fixed at the lower end of the lower cover through an oil cup clamping ring.

Further, the lower surface of the guide plate is plated with heat reflection coating.

Further, a first sealing ring is fixed at the upper end of the upper cover and arranged between the upper cover and the oil conservator; a second sealing ring is arranged between the upper cover and the silica gel bottle; a third sealing ring is arranged between the lower cover and the silica gel bottle; and a fourth sealing ring is arranged between the lower cover and the oil seal cup.

Furthermore, the oil seal cup and the silica gel bottle are made of transparent organic glass.

Furthermore, the flow guide pipe is communicated with the connecting rod through a transfer pipe.

The utility model discloses following beneficial effect has:

1. the silica gel is dehumidified by the respirator without being disassembled, so that the utilization rate of the silica gel is improved, and the service life of the respirator is prolonged.

2. Through heating regeneration silica gel, under the prerequisite that does not influence the normal breathing of transformer, saved the dismouting process of respirator, reduced human error, realize judging, control, heating, gas exchange overall process is automatic to be accomplished, has reduced fortune dimension personnel's work load, improves labor productivity.

3. The programmed, normalized and standardized control flow is realized through the controller and the temperature and humidity sensor, and the heating starting time, the heating temperature control and the air duct extraction are controlled.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a cross-sectional view at a-a of fig. 2.

Fig. 4 is a partially enlarged view of fig. 3 at B.

Fig. 5 is a partially enlarged view of fig. 3 at C.

Fig. 6 is a partially enlarged view of fig. 3 at D.

Fig. 7 is a partial cross-sectional view of the present invention.

Fig. 8 is a partial enlarged view at E of fig. 7.

Fig. 9 is a partial enlarged view of fig. 7 at F.

Fig. 10 is a partial cross-sectional view of the connector.

Fig. 11 is a schematic view of the overall structure of the condensation sheet.

Fig. 12 is a schematic view of the overall structure of the condensation cap.

The reference numbers in the figures denote:

1. an upper cover; 101. a vent hole; 2. a condensation sheet; 201. a heat sink; 202. a heat insulating sheet; 203. a refrigeration member; 3. a breathing tube; 301. an introduction hole; 302. a discharge hole; 303. a flow guide pipe; 4. a baffle; 5. a support; 6. a sensor; 7. a heating device; 8. a silica gel bottle; 9. a lower cover; 901. an oil through hole; 10. an oil cup snap ring; 11. an oil seal cup; 12. a connecting rod; 13. a transfer tube; 14. a controller; 15. a first seal ring; 16. a second seal ring; 17. a third seal ring; 18. a fourth seal ring; 19. a gas condensation cap; 191. a fastening part; 192. a conical cap; 193. an exhaust hole; 21. a connecting member; 211. an upper sleeve; 212. external taper threads; 213. a groove; 214. a lower sleeve; 215. an inner tapered thread; 216. an external thread; 217. an adjustment member; 218. an internal thread; 219. and (6) clamping the convex block.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-11, a breather for a transformer comprises a silica gel bottle 8, an upper cover 1 fixed at the upper end of the silica gel bottle 8 and used for connecting an oil conservator, a lower cover 9 fixed at the lower end of the silica gel bottle 8, and an oil seal cup 11 fixed below the lower cover 9; a plurality of vertically through vent holes 101 for communicating the oil conservator and the silica gel bottle 8 are formed in the upper cover 1, and the vent holes 101 are used for communicating the silica gel bottle 8 with a ventilation pipeline of the oil conservator; a plurality of vertically through oil through holes 901 communicated with the oil seal cup 11 are formed in the lower cover 9; the middle part of the silica gel bottle 8 is vertically provided with a hollow breathing tube 3; the upper end of the breathing tube 3 penetrates upwards and is fixed on the upper cover 1, the lower end of the breathing tube 3 is communicated with a flow guide tube 303 which inclines downwards, and the tail end of the flow guide tube 303 penetrates through the side wall of the lower cover 9 and is fixedly connected with a hollow connecting rod 12; a one-way valve for preventing outside air from entering is fixed at the tail end inside the connecting rod 12; the silicon rubber bottle 8 is internally provided with a condensing sheet 2, a bracket 5 and a heating device 7 which are sequentially fixed on the outer wall of the breathing tube 3 from top to bottom; a plurality of sensors 6 for detecting temperature and humidity are fixed on the bracket 5; the sensor 6 and the heating device 7 are in electric signal connection with a controller 14 fixed on the outer wall of the lower cover 9; and a silica gel adsorbent is filled in the silica gel bottle 8, and the height of the silica gel adsorbent is lower than that of the support 5.

Further, the condensation plate 2 includes a heat sink 201, two heat insulation plates 202 respectively fixed to the upper and lower ends of the heat sink 201, and a plurality of hollow refrigeration pieces 203 vertically penetrating through the heat sink 201 and the heat insulation plates 202.

Further, a flow guide plate 4 is arranged in the silica gel bottle 8, and the flow guide plate 4 is fixed on the outer wall of the breathing tube 3; the guide plate 4 is of an inverted umbrella-shaped structure; the baffle 4 is positioned between the condensation sheet 2 and the bracket 5; the upper end of the guide plate 4 is tightly attached to the lower end of the outer wall of the condensation sheet 2; a plurality of leading-in holes 301 are formed in the breathing tube 3, and the lower ends of the leading-in holes 301 are arranged close to the lower part of the guide plate 4; a plurality of exhaust holes 302 are further formed in the breathing tube 3, and the exhaust holes 302 are located between the heating device 7 and the bracket 5. The guide plate 4 with an inverted umbrella-shaped structure is used for receiving the condensed water cooled by the condensing sheet 2 and gathering the condensed water into the breathing tube 3 through the leading-in hole 301.

Further, a gas condensation cap 19 is fixedly sleeved on the upper end of the refrigeration piece 203; the gas condensation cap 19 comprises a clamping part 191 with the lower end sleeved on the inner side of the upper end of the refrigeration piece 203 and a conical cap 192 fixed on the upper end of the clamping part 191; a plurality of through air vents 193 are uniformly formed on the side wall of the clamping part 191. The condensation cap 19 acts as a barrier, and the condensation effect of the refrigeration piece 203 is enhanced through the conical cap 192 and the vent hole 193, so that excessive water vapor is prevented from entering the oil conservator.

Further, the oil seal cup 11 is fixed at the lower end of the lower cover 9 through an oil cup snap ring 10.

Further, the lower surface of the flow guide plate 4 is plated with heat reflection coating.

Further, a first sealing ring 15 is fixed at the upper end of the upper cover 1, and the first sealing ring 15 is arranged between the upper cover 1 and the conservator and used for sealing between the upper cover 1 and the conservator; a second sealing ring 16 is arranged between the upper cover 1 and the silica gel bottle 8; a third sealing ring 17 is arranged between the lower cover 9 and the silica gel bottle 8; a fourth sealing ring 18 is arranged between the lower cover 9 and the oil seal cup 11.

Further, the oil seal cup 11 and the silica gel bottle 8 are made of transparent organic glass.

Further, the flow guide pipe 303 is communicated with the connecting rod 12 through a transfer pipe 13.

Particularly, the diversion tube 303 is fixedly connected with the adapter tube 13 through a connecting piece 21; the connecting piece 21 is arranged on the outer side wall of the joint of the diversion pipe 303 and the adapter pipe 13; the tail end of the flow guide pipe 303 is inserted into and connected with the upper end of the adapter pipe 13, and the flow guide pipe 303 is locked at the upper end of the adapter pipe 13 by the connecting piece 21; the connecting piece 21 comprises a lower sleeve 214 fixed on the outer peripheral wall of the upper part of the adapter tube 13, an upper sleeve 211 arranged between the outer peripheral wall of the guide tube 303 and the inner side wall of the lower sleeve 214, and an adjusting piece 217 capable of adjusting the relative sliding of the lower sleeve 214 and the upper sleeve 211 along the contact surface of the lower sleeve 214 and the upper sleeve 211; the inner side wall of the upper sleeve 211 is fixedly connected with the outer peripheral wall of the guide pipe 303, and the outer peripheral wall of the upper sleeve 211 is tightly attached to the inner side wall of the lower sleeve 214; the adjusting piece 217 is sleeved on the outer side of the joint of the upper sleeve 211 and the lower sleeve 214; the upper part of the inner side wall of the adjusting piece 217 is clamped on the outer peripheral wall of the upper sleeve 211, and the lower part of the inner side wall of the adjusting piece 217 is rotationally fixed on the outer peripheral wall of the lower sleeve 214; the adjusting element 217 is screwed to drive the upper sleeve 211 and the lower sleeve 214 to slide relatively along the contact surface of the upper sleeve 211 and the lower sleeve 214, so that the upper sleeve 211 and the lower sleeve 214 are locked relatively.

An annular groove 213 is formed in the outer peripheral wall of the upper part of the upper sleeve 211; the outer peripheral wall of the lower part of the upper sleeve 211 is provided with outer conical threads 212 which gradually reduce the caliber along the lower end surface; the upper part of the inner side wall of the lower sleeve 214 is provided with an inner tapered thread 215 which gradually increases along the caliber of the upper end surface; the external tapered threads 212 and the internal tapered threads 215 are mated with each other; the upper part of the outer peripheral wall of the lower sleeve 214 is provided with an external thread 216; the upper end of the inner side wall of the adjusting part 217 is provided with a clamping lug 219 capable of sliding in the groove 213, and the lower part of the inner side wall of the adjusting part 217 is provided with an internal thread 218 matched with the external thread 216. Tightening the adjusting member 217, the upper sleeve 211 and the lower sleeve 214 can be locked along the contact surfaces thereof by the mutual engagement between the external tapered thread 212 and the internal tapered thread 215, and the mutual engagement between the internal thread 218 and the external thread 216; moreover, when the upper sleeve 211 and the lower sleeve 214 are locked, the inner side wall of the upper sleeve 211 can tightly press the outer peripheral wall of the draft tube 303, so that the draft tube 303 is prevented from being disjointed with the upper sleeve 211; in addition, the taper thread matching between the external taper thread 212 and the internal taper thread 215 can also lock the upper sleeve 211 and the lower sleeve 214, prevent the adapter tube 13 from being separated from the flow guide tube 303, and improve the stability and firmness of connection.

A regeneration method of silica gel in a respirator for a transformer comprises the following specific steps:

firstly, communicating a connecting rod 12 with a suction pump outside a respirator; meanwhile, the sensor 6 monitors the humidity in the silica gel bottle 8 in real time;

secondly, when the sensor 6 detects that the humidity in the silica gel bottle 8 is larger than a set maximum threshold value, the silica gel regeneration mechanism starts to operate, the sensor 6 transmits a signal to the controller 14, the controller 14 controls the heating device 7 to heat, and meanwhile, the air suction pump is started;

thirdly, starting the air pump, and pumping away the water vapor generated by heating the silica gel adsorbent through the connecting rod 12 and the exhaust hole 302 on the breathing tube 3; the water vapor which is not pumped out meets the condensing sheet 2 when rising and is condensed into water, drops on the flow guide plate 4 and is collected into the breathing tube 3 through the leading-in hole 301;

fourthly, when the sensor 6 detects that the temperature in the silica gel bottle 8 is higher than the set maximum threshold value, the controller 14 controls the heating device 7 to stop heating, and when the temperature in the silica gel bottle 8 is gradually reduced until the temperature is lower than the set minimum threshold value, the controller 14 controls the heating device 7 to heat again;

and fifthly, when the sensor 6 detects that the humidity in the silica gel bottle 8 is lower than a set minimum threshold value, the controller 14 controls the heating device 7 to stop heating, and simultaneously stops the air pump, and the silica gel regeneration mechanism is closed.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A respirator for a transformer is characterized in that: the oil seal device comprises a silica gel bottle (8), an upper cover (1) which is fixed at the upper end of the silica gel bottle (8) and used for connecting an oil conservator, a lower cover (9) which is fixed at the lower end of the silica gel bottle (8) and an oil seal cup (11) which is fixed below the lower cover (9); a plurality of vertically through vent holes (101) for communicating the oil conservator and the silica gel bottle (8) are formed in the upper cover (1); a plurality of vertically through oil through holes (901) communicated with the oil seal cup (11) are formed in the lower cover (9); a hollow breathing tube (3) is vertically arranged in the middle of the silica gel bottle (8); the upper end of the breathing tube (3) penetrates out upwards and is fixed on the upper cover (1), the lower end of the breathing tube (3) is communicated with a downward-inclined flow guide tube (303), and the tail end of the flow guide tube (303) penetrates out of the side wall of the lower cover (9) and is fixedly connected with a hollow connecting rod (12); the tail end of the inside of the connecting rod (12) is fixed with a one-way valve for preventing outside air from entering; a condensing sheet (2), a bracket (5) and a heating device (7) which are sequentially fixed on the outer wall of the breathing tube (3) from top to bottom are arranged in the silica gel bottle (8); a plurality of sensors (6) for detecting temperature and humidity are fixed on the bracket (5); the sensor (6) and the heating device (7) are in electric signal connection with a controller (14) fixed on the outer wall of the lower cover (9); silica gel adsorbent is filled in the silica gel bottle (8), and the height of the silica gel adsorbent is lower than that of the support (5).

2. The respirator for a transformer according to claim 1, wherein: the condensing sheet (2) comprises a radiating fin (201), two heat insulation sheets (202) which are respectively fixed at the upper end and the lower end of the radiating fin (201), and a plurality of hollow refrigerating pieces (203) which vertically penetrate through the radiating fin (201) and the heat insulation sheets (202).

3. The respirator for a transformer according to claim 1, wherein: a guide plate (4) is arranged in the silica gel bottle (8), and the guide plate (4) is fixed on the outer wall of the breathing tube (3); the guide plate (4) is of an inverted umbrella-shaped structure; the guide plate (4) is positioned between the condensation sheet (2) and the bracket (5); the upper end of the guide plate (4) is tightly attached to the lower end of the outer wall of the condensation sheet (2); a plurality of leading-in holes (301) are formed in the breathing tube (3), and the lower ends of the leading-in holes (301) are arranged close to the lower part of the guide plate (4); a plurality of discharge holes (302) are further formed in the breathing pipe (3), and the discharge holes (302) are located between the heating device (7) and the support (5).

4. The respirator for a transformer according to claim 2, wherein: the upper end of the refrigerating piece (203) is also fixedly sleeved with a gas condensation cap (19); the gas condensation cap (19) comprises a clamping part (191) with the lower end sleeved on the inner side of the upper end of the refrigeration piece (203) and a conical cap (192) fixed on the upper end of the clamping part (191); and a plurality of through exhaust holes (193) are uniformly formed in the side wall of the clamping part (191).

5. The respirator for a transformer according to claim 1, wherein: the oil seal cup (11) is fixed at the lower end of the lower cover (9) through an oil cup clamping ring (10).

6. The respirator for a transformer according to claim 3, wherein: the lower surface of the guide plate (4) is plated with heat reflection coating.

7. The respirator for a transformer according to claim 1, wherein: a first sealing ring (15) is fixed at the upper end of the upper cover (1), and the first sealing ring (15) is arranged between the upper cover (1) and the oil conservator; a second sealing ring (16) is arranged between the upper cover (1) and the silica gel bottle (8); a third sealing ring (17) is arranged between the lower cover (9) and the silica gel bottle (8); and a fourth sealing ring (18) is arranged between the lower cover (9) and the oil seal cup (11).

8. The respirator for a transformer according to claim 1, wherein: the oil seal cup (11) and the silica gel bottle (8) are made of transparent organic glass.

9. The respirator for a transformer according to claim 1, wherein: the guide pipe (303) is communicated with the connecting rod (12) through a transfer pipe (13).