Fully-sealed metal corrugated oil conservator

Abstract

The utility model belongs to the technical field of transformer oil storage compensation equipment in the electric power transformation industry, and particularly relates to a fully-sealed metal corrugated oil conservator, which designs a structure that an integrated cabinet seat is matched with a top cover, the integrated cabinet seat is provided with an opening in the top and is of a sealed structure, and a metal corrugated expansion core body is arranged at the bottom of the inner side of the integrated cabinet seat. A non-metal sealing ring is additionally arranged at the matching position of the integrated cabinet seat and the top cover, and a non-metal sealing gasket is additionally arranged at the matching position of the integrated cabinet seat and the metal corrugated expansion core body. Compared with a traditional inner oil type metal corrugated oil conservator, a semi-open type conservator cover structure is changed into a sealing structure, tiny sundries, water vapor and the like are prevented from invading a space defined by the inner surface of the conservator body and the outer surface of the metal corrugated expansion core body, and the hidden danger that the sundries influence operation of the core body or the water vapor generates corrosion is eliminated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to transformer oil storage compensation equipment technical field of electric power transformation industry, specifically, a kind of full-sealed metal corrugated oil storage tank, it can be used in power transformation system. BACKGROUND

[0002] In order to solve the series of problems caused by the volume change of transformer oil due to the temperature change of transformer, metal corrugated oil storage tank is usually configured to realize the volume change compensation of transformer oil in the operation of oil-immersed transformer in power transformation system.

[0003] Common metal corrugated oil storage tank is inner-oil type metal corrugated oil storage tank. So-called inner-oil type means that transformer oil exists inside metal corrugated expansion core body of metal corrugated oil storage tank, and real-time compensation is realized through the expansion and contraction of metal corrugated expansion core body. On the basis of metal corrugated expansion core body, cabinet seat for supporting and cabinet cover for protection are supplemented to form basic inner-oil type metal corrugated oil storage tank. The inside of metal corrugated expansion core body is in sealed state, and the space between metal corrugated expansion core body and cabinet body is in semi-open state.

[0004] Although inner-oil type metal corrugated oil storage tank is widely used due to its simple manufacturing and reliable structure, there are still some problems in some harsh environments. Because the cabinet seat and cabinet cover of auxiliary metal corrugated expansion core body only play the role of supporting and basic protection, and are in semi-open state, they cannot prevent small impurities from invading the space surrounded by the inner surface of cabinet body and the outer surface of metal corrugated expansion core body. Especially in harsh environments such as Gobi and sea, hard impurities or corrosive water vapor invading this space will accelerate the wear and corrosion of metal corrugated expansion core body, affecting the service life of metal corrugated oil storage tank. UTILITY MODEL CONTENTS

[0005] In order to solve the problem that inner-oil type metal corrugated oil storage tank is not suitable for harsh environment, the purpose of the utility model is to provide a full-sealed metal corrugated oil storage tank.

[0006] The purpose of the utility model is realized by the following technical solutions:

[0007] The utility model discloses a one-piece cabinet seat, metal corrugated expansion core and cabinet cover, wherein the metal corrugated expansion core is located inside one-piece cabinet seat, the bottom of metal corrugated expansion core is detachably connected with the bottom plate of one-piece cabinet seat, and the cabinet cover is detachably and sealingly connected with the top of one-piece cabinet seat.

[0008] The bottom of the metal corrugated expansion core is provided with an oil delivery pipe, the oil delivery pipe is extended by a core sealing flange and an oil delivery pipe hole, the bottom plate of the one-piece cabinet seat is processed with a groove, the core sealing flange and the core sealing rubber pad are located in the groove, and the core sealing rubber pad is compressed between the core sealing flange and the groove bottom.

[0009] The bottom plate and the side plate of the one-piece cabinet seat are sealingly welded, the top of the one-piece cabinet seat is opened, the cabinet cover and the top opening are sealingly connected through a rubber sealing pad, and are detachably connected with the one-piece cabinet seat through bolts.

[0010] The upper surface of the bottom plate of the one-piece cabinet seat is fixed with a plurality of studs outside the metal corrugated expansion core, and the bottom edge of the metal corrugated expansion core is detachably connected with the studs through nuts.

[0011] The lower surface of the bottom plate of the one-piece cabinet seat is provided with cabinet feet, the side plate of the one-piece cabinet seat is provided with a magnetic flap, and the metal corrugated expansion core is provided with a magnet matched with the magnetic flap, so that the oil level in the metal corrugated expansion core can be displayed in real time.

[0012] One end of the exhaust hose is connected to the top of the metal corrugated expansion core, and the other end of the exhaust hard pipe is closed by a cover plate when not exhausting.

[0013] The utility model has the advantages and positive effects that:

[0014] 1. Compared with the traditional internal oil type metal corrugated oil tank, the utility model changes the semi-open cabinet cover structure into a sealing structure, avoids the invasion of small sundries and water vapor into the space surrounded by the inner surface of the cabinet body and the outer surface of the metal corrugated expansion core, and eliminates the hidden dangers of sundries affecting the operation of the core or water vapor causing rust.

[0015] 2. The utility model has detachable metal corrugated expansion core and top cap, and is convenient for overhauling and replacement, and the service life of the metal corrugated oil tank is increased.

[0016] 3. The utility model is completely dustproof and waterproof, and can meet the demand of harsh operation environment such as gobi or sea. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is the internal structure schematic view of the utility model;

[0018] Fig. 2 It is the structure schematic view of the utility model integral type cabinet seat;

[0019] Fig. 3 It is the structure schematic view of the utility model metal corrugated expansion core bottom surface sealing structure;

[0020] Among them: 1 is integral type cabinet seat, 2 is cabinet cover, 3 is cabinet cover sealing ring, 4 is exhaust hose, 5 is metal corrugated expansion core, 6 is magnetic flap, 7 is core sealing rubber mat, 8 is oil pipe, 9 is oil injection pipe, 10 is cabinet foot, 11 is breathing pipe, 12 is welding stud, 13 is exhaust hard pipe, 14 is core sealing flange, 15 is oil pipe hole, 16 is recess. DETAILED DESCRIPTION

[0021] The utility model will be further described in detail in combination with the drawings.

[0022] As Figs. 1-3 Shown, the utility model includes integral type cabinet seat 1, metal corrugated expansion core 5 and cabinet cover 2, the utility model is internal oil type metal corrugated oil tank, and transformer oil flows into the inside of metal corrugated expansion core 5 through oil pipe;Metal corrugated expansion core 5 is located inside integral type cabinet seat 1, and the bottom of metal corrugated expansion core 5 is detachably connected with the bottom plate of integral type cabinet seat 1, and cabinet cover 2 is detachably and sealingly connected with the top of integral type cabinet seat 1;The bottom plate of integral type cabinet seat 1 is respectively provided with breathing pipe 11 and exhaust hard pipe 13, one end of breathing pipe 11 is communicated with the space between the outer surface of metal corrugated expansion core 5 and the inner surface of integral type cabinet seat 1, the other end of breathing pipe 11 is communicated with the atmosphere, one end of exhaust hard pipe 13 is communicated with the inside of metal corrugated expansion core 5 through exhaust hose 4, and the other end of exhaust hard pipe 13 is located outside integral type cabinet seat 1;The bottom plate of integral type cabinet seat 1 is provided with oil pipe hole 15 for oil pipe 8 to pass through, and the bottom plate of integral type cabinet seat 1 around oil pipe hole 15 is provided with core sealing rubber mat 7, the bottom of metal corrugated expansion core 5 is welded with core sealing flange 14, core sealing flange 14 presses core sealing rubber mat 7, and the bottom of metal corrugated expansion core 5 is sealed.

[0023] The bottom plate and the side plate of the integrated cabinet base 1 are sealed by welding, the top of the integrated cabinet base 1 is open, the cabinet cover 2 is made of metal (such as stainless steel), the top of the cabinet cover 2 and the integrated cabinet base 1 are both designed with annular sealing ring mounting grooves for mounting the cabinet sealing ring 3, after embedding the cabinet sealing ring 3 into the sealing ring mounting grooves, the integrated cabinet base 1 and the cabinet cover 2 are fixed by bolts to realize detachable sealing connection.

[0024] A plurality of bolts 12 are welded on the upper surface of the bottom plate of the integrated cabinet base 1 around the metal corrugated expansion core 5, and the bottom edge of the metal corrugated expansion core 5 is detachably connected with the bolts 12 through the cooperation of nuts.

[0025] One end of the exhaust hose 4 is connected to the top of the metal corrugated expansion core 5, and the metal corrugated expansion core 5 is connected with the exhaust hard pipe 11 welded on the integrated cabinet base 1 through the exhaust hose 4, so that the gas in the metal corrugated expansion core 5 can be communicated with the atmosphere through the integrated cabinet base 1.

[0026] The bottom of the metal corrugated expansion core 5 is provided with an oil delivery pipe 8 which extends out of the core sealing flange 14 and the oil delivery pipe hole 15, the bottom plate of the integrated cabinet base 1 is processed with a groove 16, the core sealing flange 14 and the core sealing rubber gasket 7 are located in the groove 16, the material of the core sealing rubber gasket 7 is rubber, and the core sealing rubber gasket 7 is compressed between the core sealing flange 14 and the groove bottom of the groove 16.

[0027] The side plate of the integrated cabinet base 1 is provided with a magnetic flap 6, and the top of the metal corrugated expansion core 5 is provided with a magnet matched with the magnetic flap 6, so as to realize real-time display of the oil level in the metal corrugated expansion core 5.

[0028] The bottom plate of the integrated cabinet base 1 is welded with cabinet feet 10, after the utility model is assembled, the cabinet feet 10 are installed on the specified position, the other end of the breathing pipe 11 is connected with an air filter, and the space between the outer surface of the metal corrugated expansion core 5 and the inner surface of the integrated cabinet base 1 is sealed, then the oil delivery pipe 8 at the bottom of the metal corrugated expansion core 5 is connected with the transformer, the transformer oil is injected from the self-oil injection pipe 9 according to the operation standard until the transformer oil flows out from the exhaust hard pipe 11, then the exhaust hard pipe 11 is closed by using the corresponding cover plate, and the inside of the metal corrugated expansion core 5 is sealed.

[0029] The working principle of the utility model is as follows:

[0030] When the transformer temperature rises, the transformer oil expands in volume, and the excess transformer oil enters the metal corrugated expansion core 5 through the oil pipe 8. At this time, the metal corrugated expansion core 5 relaxes, and the internal volume increases. When the transformer temperature decreases, the transformer oil in the metal corrugated expansion core 5 compensates into the transformer through the oil pipe 8, and at this time, the metal corrugated expansion core 5 contracts, and the internal volume decreases. The relaxation and contraction of the metal corrugated expansion core 5 will cause the change of the core height, and the magnet installed at the top of the metal corrugated expansion core 5 will cooperate with the magnetic flap 6 installed on the outer surface of the side plate of the integrated cabinet base 1 to display the change of the height of the metal corrugated expansion core 5 in real time, that is, the change of the oil level.

[0031] When the metal corrugated expansion core 5 fails such as leakage, the transformer oil in the metal corrugated expansion core 5 is discharged through the oil pipe 8, the cabinet cover 2 is opened, the exhaust hose 4 and the metal corrugated expansion core 5 fixing nut are removed, and the metal corrugated expansion core 5 can be removed. After replacing the new metal corrugated expansion core 5, the exhaust hose 4 and the cabinet cover 2 are installed, the oil injection and exhaust operation is repeated, and the repair of the fault is completed.

Claims

1. A full-sealed metal bellows oil reservoir characterized by: The utility model provides a kind of integrated cabinet seat (1), metal corrugated expansion core (5) and cabinet cover (2), wherein metal corrugated expansion core (5) is located inside integrated cabinet seat (1), the bottom of the metal corrugated expansion core (5) is detachably connected with the bottom plate of integrated cabinet seat (1), the cabinet cover (2) is detachably sealed connection with the top of integrated cabinet seat (1);The bottom plate of the integrated cabinet seat (1) is respectively provided with breathing pipe (11) and exhaust hard pipe (13), one end of the breathing pipe (11) and the space between the outer surface of metal corrugated expansion core (5) and the inner surface of integrated cabinet seat (1) are communicated, the other end of the breathing pipe (11) is communicated with the atmosphere, one end of the exhaust hard pipe (13) is communicated with the inside of metal corrugated expansion core (5) by exhaust hose (4), the other end of the exhaust hard pipe (13) is located outside integrated cabinet seat (1);The bottom plate of the integrated cabinet seat (1) is provided with oil delivery pipe hole (15) for oil delivery pipe (8) to pass through, the bottom plate of the integrated cabinet seat (1) is provided with core sealing rubber gasket (7) on the periphery of the oil delivery pipe hole (15), the bottom of the metal corrugated expansion core (5) is fixedly connected with core sealing flange (14), the core sealing flange (14) is pressed tightly core sealing rubber gasket (7), realizes the bottom sealing of the metal corrugated expansion core (5).

2. The fully sealed metal bellows oil reservoir according to claim 1, characterized by: The bottom of the metal corrugated expansion core (5) is provided with oil delivery pipe (8), the oil delivery pipe (8) is stretched out by core sealing flange (14) and oil delivery pipe hole (15), the bottom plate of the integrated cabinet seat (1) is machined with recess (16), the core sealing flange (14) and core sealing rubber gasket (7) are all located in recess (16), the core sealing rubber gasket (7) is pressed tightly between core sealing flange (14) and the groove bottom of recess (16).

3. The fully sealed metal bellows oil reservoir according to claim 1, characterized by: The bottom plate and side plate of the integrated cabinet seat (1) are sealingly welded, the top of the integrated cabinet seat (1) is opened, the cabinet cover (2) is sealed by rubber sealing pad with the top opening, and is detachably connected with the integrated cabinet seat (1) by bolt.

4. The fully sealed metal bellows oil reservoir according to claim 1, characterized by: The upper surface of the bottom plate of the integrated cabinet seat (1) is fixedly connected with a plurality of studs (12) in the periphery of the metal corrugated expansion core (5), and the bottom edge of the metal corrugated expansion core (5) is detachably connected with the studs (12) by nuts.

5. The fully sealed metal bellows oil reservoir according to claim 1, characterized by: The lower surface of the bottom plate of the integrated cabinet seat (1) is provided with cabinet feet (10), the side plate of the integrated cabinet seat (1) is provided with a magnetic flap (6), and the metal corrugated expansion core (5) is provided with a magnet matched with the magnetic flap (6) to display the oil level in the metal corrugated expansion core (5) in real time.

6. The fully sealed metal bellows oil reservoir according to claim 1, characterized by: One end of the exhaust hose (4) is connected to the top of the metal corrugated expansion core (5), and the other end of the exhaust hard pipe (13) is closed by a cover plate when not exhausting.

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