CN208865083U

CN208865083U - A kind of transformer oil draining nitrogen filling protective device

Info

Publication number: CN208865083U
Application number: CN201820639947.0U
Authority: CN
Inventors: 陈海
Original assignee: Guizhou Longchen (group) Electric Co Ltd
Current assignee: Guizhou Longchen (group) Electric Co Ltd
Priority date: 2018-05-02
Filing date: 2018-05-02
Publication date: 2019-05-17
Anticipated expiration: 2028-05-02

Abstract

The utility model relates to transformer safeguard technical fields, and disclose a kind of transformer oil draining nitrogen filling protective device, including ground, side at the top of the ground is fixedly installed with protective housing, the side of the protective housing intracavity bottom is fixedly installed with gripping mechanism, nitrogen cylinder is placed in the middle part of the gripping mechanism top, and the quantity of nitrogen cylinder is two, the inner cavity of the protective housing is fixedly installed with fixed device in the middle part of gripping mechanism side.The transformer oil draining nitrogen filling protective device, quick clamping fixed is carried out by bottom of the gripping mechanism to nitrogen cylinder, facilitate placement nitrogen cylinder and avoids its basal sliding, utilize the middle part of the fixed nitrogen cylinder of fixed device, avoid its shaking, attachment device connection nitrogen cylinder and connecting tube are recycled, the leakproofness of junction is connected and improved convenient for the two, to improve the leakproofness and stability of transformer oil draining nitrogen filling protective device.

Description

A kind of transformer oil draining nitrogen filling protective device

Technical field

The utility model relates to transformer safeguard technical field, specially a kind of transformer oil draining nitrogen filling protection dress It sets.

Background technique

Transformer is the device for changing alternating voltage using the principle of electromagnetic induction, and main member is primary coil, secondary Grade coil and iron core, can be divided into, according to use, power transformer and special transformer, oil-drainage nitrogen-filling fire-extinguishing is widely used in High-power transformer it is fire-proof and explosion-proof, when inside transformer breaks down, fuel tank internal generates a large amount of fuel gas, causes gas The actuating of relay issues grave gas signal, circuit breaker trip.

It is that the bottle body for containing nitrogen is directly placed on box house in existing oil draining nitrogen filling protective device, in case Bottle body is easy inclination when body is by external force, causes gas leakage or explosion, the greasy dirt being discharged from transformer is also to be directly discharged into oil Protective device is not installed in pond, be easy to cause fire or oil sump to explode when ambient temperature or internal temperature raising, existing oil sump There are security risks, propose a kind of transformer oil draining nitrogen filling protective device thus.

Utility model content

(1) the technical issues of solving

In view of the deficiencies of the prior art, the utility model provides a kind of transformer oil draining nitrogen filling protective device, has just In placing the advantages that fixing with heat-insulated fire extinguishing, solving is the bottle that will directly contain nitrogen in existing oil draining nitrogen filling protective device Body is placed on box house, and when cabinet is by external force, bottle body is easy inclination, causes gas leakage or explosion, is discharged from transformer Greasy dirt be also to be directly discharged into oil sump, protective device is not installed, be easy to cause fire when ambient temperature or internal temperature increase There is security risk in calamity or oil sump explosion, existing oil sump.

(2) technical solution

To realize the above-mentioned purpose convenient for placing fixed and heat-insulated fire extinguishing, the utility model is provided the following technical solutions: one Transformer oil draining nitrogen filling protective device, including ground are planted, the side at the top of the ground is fixedly installed with protective housing, the protection The side of box cavity bottom is fixedly installed with gripping mechanism, is placed with nitrogen cylinder, and nitrogen in the middle part of the gripping mechanism top The quantity of bottle is two, and the inner cavity of the protective housing is fixedly installed with fixed device in the middle part of gripping mechanism side, described The inside of fixed device and the external activity of nitrogen cylinder are socketed, and the screw top of the nitrogen cylinder is socketed with attachment device, described The middle part movable sleeve on attachment device top is connected to connecting tube, and the inner cavity fixing sleeve of the protective housing is connected to above connecting tube Fixed plate is fixedly connected with nitrogen tube in the middle part of the connecting tube top, and the top of the nitrogen tube sequentially passes through from bottom to up The bottom of fixed plate and the top of protection box cavity and the top for extending to protective housing, the external fixing sleeve of the nitrogen tube are connected to Exhaust valve at the top of fixed plate between protective housing inner cavity top, the middle part fixing sleeve of the exhaust valve side are connected to passively Wheel, the external tooth of the follower bottom are engaged with driving wheel, and the driving wheel is fixedly attached on the output shaft of positive and negative motor, institute The middle part that positive and negative motor is fixedly mounted on fixed plate top is stated, the external tooth of the driving wheel other side is engaged with helical gear, described Helical gear is fixedly attached to the middle part of draining valve side, and the inside fixing sleeve of the draining valve is connected to oil pipe, the top of the oil pipe The top of protective housing is run through and is extended at end, and the bottom end of the oil pipe sequentially passes through top and the protective housing of fixed plate from top to bottom Bottom and extend to the inside on ground and be fixedly connected with fuel tank, the top of the fuel tank is run through and extends to the upper of ground Side, the middle part of the fuel tank inner chamber front and rear sides is fixedly installed with slide plate, and the quantity of slide plate is two, and the fuel tank is separate Sealing device is fixedly connected in the middle part of oil pipe side, the bottom of the sealing device is embedded in the top on ground, the sealing One end of device is run through and extends to the inside of fuel tank and connect with the top slide of slide plate.

Preferably, the gripping mechanism includes fixing chuck plate and movable snap-gauge, the side of the fixing chuck plate and active card The side of plate is flexibly connected, and the bottom of the fixing chuck plate is fixedly connected with the bottom of protection box cavity, the activity snap-gauge Bottom is connect with the basal sliding of protection box cavity, and the two sides at the top of the fixing chuck plate are opened with the two sides at the top of movable snap-gauge Equipped with groove, the two sides of the active card back are fixedly connected to gag lever post, and the quantity of gag lever post is two, two institutes The other end for stating gag lever post extends through and extends to the back side of fixing chuck plate, the positive middle part screw thread socket of activity snap-gauge Have a bolt, the other end of the bolt run through and extend to movable snap-gauge the back side and with the positive middle part thread bush of fixing chuck plate It connects.

Preferably, the fixed device includes fixed block, and the side of the fixed block and the side of protection box cavity are fixed It connects, the equal fixing sleeve in middle part of two sides is connected to round bar above and below the fixed block inner cavity, and the middle part movable sleeve of the round bar is connected to card Item, the back side of the strip and the external activity of nitrogen cylinder connect, and the positive middle part screw thread of the strip other end is socketed with spiral shell Nail, the other end of the screw run through and extend to the back side of strip and be socketed with the back side screw thread of protection box cavity.

Preferably, the attachment device includes sleeve, and the bottom of the barrel bore and the screw top of nitrogen cylinder are socketed, The middle part on the sleeve top and the external activity of connecting tube bottom end are socketed, and the top movable of the barrel bore is connected with gear Plate, the baffle are fixedly attached to the bottom end outside connecting tube, and the bottom end fixing sleeve of the connecting tube is connected to sealing ring, described close The bottom end of seal and the top movable of nitrogen cylinder are socketed.

Preferably, the sealing device includes installs case, and the bottom of the installs case is embedded in the top on ground, the peace The bottom of vanning inner cavity is fixedly installed with servo motor far from the side of fuel tank, is fixedly connected on the output shaft of the servo motor There is a screw rod, the other end of the screw rod runs through and extends to the inside of fuel tank and screw thread is socketed with sealing plate, the sealing plate Front and rear sides are respectively at the top slide connection of two slide plates, and the two sides of the sealing plate are respectively at the activity of the two sides of fuel tank inner chamber It connects, the sand being placed at the top of the sealing plate above fuel tank inner chamber.

Preferably, the quantity of the groove is four and is respectively corresponded in pairs in the two sides of fixing chuck plate top face With the two sides at the back side at the top of movable snap-gauge, the inside of groove described in two groups is movable respectively at the front and rear sides of two nitrogen cylinder bottoms Socket.

(3) beneficial effect

Compared with prior art, the utility model provides a kind of transformer oil draining nitrogen filling protective device, and having following has Beneficial effect:

1, the transformer oil draining nitrogen filling protective device carries out rapid card fastening by bottom of the gripping mechanism to nitrogen cylinder It is fixed, facilitate and places nitrogen cylinder and its basal sliding is avoided to avoid its shaking using the middle part of the fixed nitrogen cylinder of fixed device, then Nitrogen cylinder and connecting tube are connected using attachment device, the leakproofness of junction is connected and improved convenient for the two, to improve The leakproofness and stability of transformer oil draining nitrogen filling protective device.

2, transformer oil draining nitrogen filling protective device, by installing sealing device in the side of fuel tank, on sealing device Sand is placed in the top of sealing plate, not only increases the heat insulation of fuel tank, and utilize the cooperation between sealing device and sand Using can quickly and effectively put out a fire, positive and negative motor is installed in fixed plate, utilizes positive and negative motor, driving wheel, follower and helical teeth Being used cooperatively between wheel can quickly control the folding of exhaust valve and draining valve, to improve the protection of transformer oil draining nitrogen filling The practicability of device and safety.

Detailed description of the invention

FIG. 1 is a schematic structural view of the utility model；

Fig. 2 is 1 gripping mechanism schematic diagram of the utility model structure chart；

Fig. 3 is enlarged diagram at the A of the utility model structure chart 1；

Fig. 4 is 3 sealing ring schematic diagram of the utility model structure chart.

In figure: 1 ground, 2 protective housings, 3 gripping mechanisms, 31 fixing chuck plates, 32 movable snap-gauges, 33 grooves, 34 gag lever posts, 35 Bolt, 4 nitrogen cylinders, 5 fixed devices, 51 fixed blocks, 52 round bars, 53 strips, 54 screws, 6 attachment devices, 61 sleeves, 62 baffles, 63 sealing rings, 7 connecting tubes, 8 fixed plates, 9 nitrogen tubes, 10 exhaust valves, 11 followers, 12 driving wheels, 13 positive and negative motors, 14 helical teeth Wheel, 15 draining valves, 16 oil pipes, 17 fuel tanks, 18 slide plates, 19 sealing devices, 191 installs cases, 192 servo motors, 193 screw rods, 194 Sealing plate.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-4 is please referred to, the utility model provides a kind of technical solution, a kind of transformer oil draining nitrogen filling protective device, packet Ground 1 is included, the side at 1 top of ground is fixedly installed with protective housing 2, and the side of 2 intracavity bottom of protective housing is fixedly installed with clamping Device 3, gripping mechanism 3 include fixing chuck plate 31 and movable snap-gauge 32, the side of the side of fixing chuck plate 31 and movable snap-gauge 32 It is flexibly connected, the bottom of fixing chuck plate 31 is fixedly connected with the bottom of 2 inner cavity of protective housing, the bottom of movable snap-gauge 32 and protective housing The basal sliding of 2 inner cavities connects, and the two sides at 32 top of two sides and movable snap-gauge at 31 top of fixing chuck plate open up fluted 33, The quantity of groove 33 is four and is respectively corresponded in pairs in the two sides and the movable top of snap-gauge 32 of 31 top face of fixing chuck plate The two sides at the portion back side, the inside of two groups of grooves 33 facilitate and put respectively at the front and rear sides pivot bush unit of two 4 bottoms of nitrogen cylinder Set nitrogen cylinder 4, and improve the stability of nitrogen cylinder 4, thus improve transformer oil draining nitrogen filling protective device stability and Practicability, the two sides at movable 32 back side of snap-gauge are fixedly connected to gag lever post 34, and the quantity of gag lever post 34 is two, two limits The other end of position bar 34 extends through and extends to the back side of fixing chuck plate 31, and the positive middle part screw thread of movable snap-gauge 32 is socketed with The other end of bolt 35, bolt 35 run through and extend to movable snap-gauge 32 the back side and with the positive middle part screw thread of fixing chuck plate 31 Socket avoids nitrogen cylinder 4 using gripping mechanism 3 convenient for placing nitrogen cylinder 4, and convenient for the bottom of nitrogen cylinder 4 is fixed Basal sliding, to improve the stability of transformer oil draining nitrogen filling protective device, gripping mechanism is placed with nitrogen in the middle part of 3 top Gas cylinder 4, and the quantity of nitrogen cylinder 4 is two, the inner cavity of protective housing 2 is fixedly installed in the middle part of 3 side of gripping mechanism Determine device 5, fixed device 5 includes fixed block 51, and the side of fixed block 51 is fixedly connected with the side of 2 inner cavity of protective housing, fixed The equal fixing sleeve in middle part of two sides is connected to round bar 52 above and below 51 inner cavity of block, and the middle part movable sleeve of round bar 52 is connected to strip 53, strip 53 The back side connect with the external activity of nitrogen cylinder 4, the positive middle part screw thread of 53 other end of strip is socketed with screw 54, screw 54 The other end runs through and extends to the back side of strip 53 and be socketed with the back side screw thread of 2 inner cavity of protective housing, can be with using fixed device 5 The middle part of the fixation nitrogen cylinder 4 of fast and stable avoids nitrogen cylinder 4 from shaking, to improve transformer oil draining nitrogen filling protective device Stability, the inside of fixed device 5 and the external activity of nitrogen cylinder 4 be socketed, and the screw top of nitrogen cylinder 4 is socketed with connection dress 6 are set, attachment device 6 includes sleeve 61, and the bottom of 61 inner cavity of sleeve and the screw top of nitrogen cylinder 4 are socketed, 61 top of sleeve The external activity of middle part and 7 bottom end of connecting tube is socketed, and the top movable of 61 inner cavity of sleeve is connected with baffle 62,62 fixing sleeve of baffle The bottom end outside connecting tube 7 is connect, the bottom end fixing sleeve of connecting tube 7 is connected to sealing ring 63, the bottom end of sealing ring 63 and nitrogen cylinder 4 Top movable socket, can quickly connect nitrogen cylinder 4 and connecting tube 7 using attachment device 6, and ensure that nitrogen cylinder 4 with connect The leakproofness of 7 junction of pipe, so that the leakproofness of transformer oil draining nitrogen filling protective device is improved, in 6 top of attachment device Portion's movable sleeve is connected to connecting tube 7, and the inner cavity fixing sleeve of protective housing 2 is connected to the fixed plate 8 above connecting tube 7, and connecting tube 7 is pushed up Nitrogen tube 9 is fixedly connected in the middle part of end, the top of nitrogen tube 9 sequentially passes through bottom and the protective housing 2 of fixed plate 8 from bottom to up The top of inner cavity and the top for extending to protective housing 2, the external fixing sleeve of nitrogen tube 9 are connected to positioned at 8 top of fixed plate and protection Exhaust valve 10 between 2 inner cavity top of case, the middle part fixing sleeve of 10 side of exhaust valve are connected to follower 11,11 bottom of follower External tooth is engaged with driving wheel 12, and driving wheel 12 is fixedly attached on the output shaft of positive and negative motor 13, and positive and negative motor 13 is fixedly mounted At the middle part on 8 top of fixed plate, the external tooth of 12 other side of driving wheel is engaged with helical gear 14, and helical gear 14 is fixedly attached to oil extraction The middle part of 15 side of valve, the inside fixing sleeve of draining valve 15 are connected to oil pipe 16, and the top of oil pipe 16 is run through and extends to protective housing 2 Top, the bottom end of oil pipe 16 sequentially passes through the top of fixed plate 8 and the bottom of protective housing 2 from top to bottom and extends to ground 1 Inside and be fixedly connected with fuel tank 17, the top on ground 1 is run through and is extended at the top of fuel tank 17, two before and after 17 inner cavity of fuel tank The middle part of side is fixedly installed with slide plate 18, and the quantity of slide plate 18 is two, and middle part of the fuel tank 17 far from 16 side of oil pipe is solid Surely it is connected with sealing device 19, sealing device 19 includes installs case 191, and the bottom of installs case 191 is embedded in the top on ground 1, The bottom of 191 inner cavity of installs case is fixedly installed with servo motor 192, the output shaft of servo motor 192 far from the side of fuel tank 17 On be fixedly connected with screw rod 193, the other end of screw rod 193 runs through and extends to the inside of fuel tank 17 and screw thread is socketed with sealing plate 194, the front and rear sides of sealing plate 194 are respectively at the top slide connection of two slide plates 18, and the two sides of sealing plate 194 are respectively at oil The two sides of 17 inner cavity of case are flexibly connected, and the top of sealing plate 194 is placed with the sand above 17 inner cavity of fuel tank, utilizes sand Leakproofness that is heat-insulated and improving fuel tank 17, while fuel tank 17 can be carried out by being used cooperatively between sealing device 19 and sand Quick extinguishing, to improve practicability and the safety of transformer oil draining nitrogen filling protective device, the bottom of sealing device 19 is embedding Enter the top on ground 1, the inside of fuel tank 17 and the top slide with slide plate 18 are run through and extended in one end of sealing device 19 Connection.

When work, nitrogen cylinder 4 is placed on gripping mechanism 3 first, by attachment device 6 by the top of nitrogen cylinder 4 with The bottom of connecting tube 7 connects and fixing seal, then by the bottom of 3 clamping fixed nitrogen cylinder 4 of gripping mechanism, while utilizing fixed dress The middle part for setting 5 fixed nitrogen cylinders 4 opens positive and negative motor 13 and driving wheel 12 is driven to rotate when needing oil draining nitrogen filling, driving wheel 12 It drives follower 11 and helical gear 14 to rotate simultaneously and opens exhaust valve 10 and draining valve 15 respectively, when needing to put out a fire to fuel tank 17 When, opening sealing device 19 makes sand fall to the lower section inside fuel tank 17.

In conclusion the transformer oil draining nitrogen filling protective device, is carried out fast by bottom of the gripping mechanism 3 to nitrogen cylinder 4 Fast clamping fixed is facilitated and places nitrogen cylinder 4 and its basal sliding is avoided to be kept away using the middle part of the fixed nitrogen cylinder 4 of fixed device 5 Exempt from its shaking, attachment device 6 is recycled to connect nitrogen cylinder 4 and connecting tube 7, the sealing of junction is connected and improved convenient for the two Property, so that the leakproofness and stability of transformer oil draining nitrogen filling protective device are improved, it is close by being installed in the side of fuel tank 17 Seal apparatus 19 places sand in the top of 19 upper sealing panel 194 of sealing device, not only increases the heat insulation of fuel tank 17, and It can quickly and effectively be put out a fire using being used cooperatively between sealing device 19 and sand, positive and negative motor 13 is installed in fixed plate 8, Exhaust valve 10 can be quickly controlled using being used cooperatively between positive and negative motor 13, driving wheel 12, follower 11 and helical gear 14 With the folding of draining valve 15, to improve practicability and the safety of transformer oil draining nitrogen filling protective device；It solves existing Oil draining nitrogen filling protective device in be that the bottle body for containing nitrogen is directly placed on box house, when cabinet is by external force bottle Body is easy inclination, causes gas leakage or explosion, and the greasy dirt being discharged from transformer is also to be directly discharged into oil sump, does not install protection dress It sets, be easy to cause fire or oil sump to explode when ambient temperature or internal temperature raising, there are security risks for existing oil sump Problem.

It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims

1. a kind of transformer oil draining nitrogen filling protective device, including ground (1), it is characterised in that: the side at the top of the ground (1) It is fixedly installed with protective housing (2), the side of protective housing (2) intracavity bottom is fixedly installed with gripping mechanism (3), the clamping It is placed with nitrogen cylinder (4) in the middle part of device (3) top, and the quantity of nitrogen cylinder (4) is two, the inner cavity of the protective housing (2) It is fixedly installed with fixed device (5) in the middle part of gripping mechanism (3) side, the inside of the fixed device (5) and nitrogen cylinder (4) external activity socket, the screw top of the nitrogen cylinder (4) are socketed with attachment device (6), attachment device (6) top The middle part movable sleeve at end is connected to connecting tube (7), and the inner cavity fixing sleeve of the protective housing (2) is connected to above connecting tube (7) Fixed plate (8) is fixedly connected with nitrogen tube (9) in the middle part of connecting tube (7) top, and the top of the nitrogen tube (9) is under The top of the supreme bottom for sequentially passing through fixed plate (8) and protective housing (2) inner cavity and the top for extending to protective housing (2), it is described The external fixing sleeve of nitrogen tube (9) is connected to the exhaust valve at the top of fixed plate (8) between protective housing (2) inner cavity top (10), the middle part fixing sleeve of exhaust valve (10) side is connected to follower (11), and the external tooth of follower (11) bottom is nibbled Conjunction has driving wheel (12), and the driving wheel (12) is fixedly attached on the output shaft of positive and negative motor (13), the positive and negative motor (13) it is fixedly mounted on the middle part on fixed plate (8) top, the external tooth of driving wheel (12) other side is engaged with helical gear (14), The helical gear (14) is fixedly attached to the middle part of draining valve (15) side, and the inside fixing sleeve of the draining valve (15) is connected to oil Manage (16), the top of protective housing (2) is run through and is extended on the top of the oil pipe (16), the bottom end of the oil pipe (16) from up to Under sequentially pass through the top of fixed plate (8) and the bottom of protective housing (2) and extend to the inside on ground (1) and be fixedly connected with oil The top of ground (1) is run through and is extended at case (17), the top of the fuel tank (17), fuel tank (17) the inner cavity front and rear sides Middle part is fixedly installed with slide plate (18), and the quantity of slide plate (18) is two, and the fuel tank (17) is far from oil pipe (16) side Middle part be fixedly connected with sealing device (19), the bottom of the sealing device (19) is embedded in the top of ground (1), described close One end of seal apparatus (19) is run through and extends to the inside of fuel tank (17) and connect with the top slide of slide plate (18).

2. a kind of transformer oil draining nitrogen filling protective device according to claim 1, it is characterised in that: the gripping mechanism It (3) include fixing chuck plate (31) and movable snap-gauge (32), the side of the side of the fixing chuck plate (31) and movable snap-gauge (32) It is flexibly connected, the bottom of the fixing chuck plate (31) is fixedly connected with the bottom of protective housing (2) inner cavity, the activity snap-gauge (32) Bottom connect with the basal sliding of protective housing (2) inner cavity, the two sides at the top of the fixing chuck plate (31) and movable snap-gauge (32) The two sides at top open up fluted (33), and the two sides at described activity snap-gauge (32) back side are fixedly connected to gag lever post (34), And the quantity of gag lever post (34) is two, the other end of two gag lever posts (34) extends through and extends to fixing chuck plate (31) the back side, described activity snap-gauge (32) positive middle part screw thread are socketed with bolt (35), the other end of the bolt (35) Run through and extends to the back side of movable snap-gauge (32) and be socketed with the positive middle part screw thread of fixing chuck plate (31).

3. a kind of transformer oil draining nitrogen filling protective device according to claim 1, it is characterised in that: the fixed device It (5) include fixed block (51), the side of the fixed block (51) is fixedly connected with the side of protective housing (2) inner cavity, the fixation The equal fixing sleeve in middle part of two sides is connected to round bar (52) above and below block (51) inner cavity, and the middle part movable sleeve of the round bar (52) is connected to strip (53), the back side of the strip (53) is connect with the external activity of nitrogen cylinder (4), the positive middle part of strip (53) other end Screw thread is socketed with screw (54), and the other end of the screw (54) runs through and extends to the back side and and the protective housing of strip (53) (2) back side screw thread socket of inner cavity.

4. a kind of transformer oil draining nitrogen filling protective device according to claim 1, it is characterised in that: the attachment device It (6) include sleeve (61), the bottom of sleeve (61) inner cavity and the screw top of nitrogen cylinder (4) are socketed, the sleeve (61) The middle part on top and the external activity of connecting tube (7) bottom end are socketed, and the top movable of sleeve (61) inner cavity is connected with baffle (62), the baffle (62) is fixedly attached to the external bottom end of connecting tube (7), and the bottom end fixing sleeve of the connecting tube (7) is connected to Sealing ring (63), the bottom end of the sealing ring (63) and the top movable of nitrogen cylinder (4) are socketed.

5. a kind of transformer oil draining nitrogen filling protective device according to claim 1, it is characterised in that: the sealing device It (19) include installs case (191), the bottom of the installs case (191) is embedded in the top of ground (1), the installs case (191) The bottom of inner cavity is fixedly installed with servo motor (192) far from the side of fuel tank (17), the output shaft of the servo motor (192) On be fixedly connected with screw rod (193), the other end of the screw rod (193) runs through and extends to inside and the thread bush of fuel tank (17) It is connected to sealing plate (194), top slide connection of the front and rear sides of the sealing plate (194) respectively at two slide plates (18), institute The two sides for stating sealing plate (194) are flexibly connected respectively at the two sides of fuel tank (17) inner cavity, and the top of the sealing plate (194) is placed There is the sand being located above fuel tank (17) inner cavity.

6. a kind of transformer oil draining nitrogen filling protective device according to claim 2, it is characterised in that: the groove (33) Quantity is four and respectively corresponds the back at the top of the two sides of fixing chuck plate (31) top face and movable snap-gauge (32) in pairs The two sides in face, the front and rear sides pivot bush unit of the inside of groove described in two groups (33) respectively at two nitrogen cylinder (4) bottoms.