A vehicle-mounted transformer oil storage cabinet

Abstract

The present application provides a vehicle-mounted transformer oil storage cabinet. The present application sets the switch oil storage cabinet separately on one side end face outside the main oil storage cabinet, which can save the materials required for the switch oil storage cabinet, and ensure that the internal structure of the main oil storage cabinet is regular, which is convenient for capsule sealing. In order to facilitate the operator to maintain the oil storage cabinet, the present application specially connects and connects the breathing channel of the main oil storage cabinet, the vacuum channel and the switch cabinet breathing channel of the switch oil storage cabinet through a pressure balance valve, and sets the above three channels to extend along the outside of the transformer body to the lower part of the oil tank, ensuring that each respirator and valve structure at the end of the channel is at a height close to the maintenance personnel, so that the transformer vacuum oil filling, the transformer overall sealing test and subsequent maintenance operations are more convenient. Therefore, the present application can design the vehicle-mounted transformer oil storage cabinet and the switch oil storage cabinet separately, which is convenient for maintenance personnel to operate and can compress the volume occupied by the oil storage cabinet, and integrate the transformer to meet the vehicle-mounted installation space requirements.

Description

Technical Field

[0001] The present application relates to the technical field of power transformers, and in particular to a vehicle-mounted transformer oil storage cabinet. Background Art

[0002] In order to improve the mechanical strength of the oil conservator, facilitate plate cutting and simplify the welding process, the cross-section of the traditional oil conservator is generally designed to be circular, and the overall shape of the oil conservator is barrel-shaped. However, the installation space of the barrel-shaped oil conservator is relatively high, and the on-board transformer cannot directly adopt the existing barrel-shaped oil conservator structure due to the external size requirements.

[0003] Other existing oil conservators can also be designed as a structure with a rectangular cross section. In this case, in order to match the shape of the main oil conservator, it is generally necessary to set the switch oil conservator to a square structure with the same shape and size as the main oil conservator. In this case, the total length of the oil conservator will be longer than the length of the main oil conservator. The square structure of the oil conservator is not beautiful in shape, uses more materials, is longer and occupies a larger space on the box cover, and needs to occupy the upper space of the top cover of the on-load switch above the transformer. Such an oil conservator structure is not conducive to the inspection and maintenance of the on-load switch on the top of the transformer.

[0004] In addition, the existing oil storage cabinets have problems such as messy and unsightly pipeline layout, long main air pipes connected to the transformer box cover, difficult box cover space layout, and inconvenient maintenance operations such as vacuuming and oiling the oil storage cabinet. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present application provides a vehicle-mounted transformer oil storage cabinet. The present application optimizes the oil storage cabinet structure and cooperates with the corresponding pipeline design to separate the vehicle-mounted transformer oil storage cabinet from the switch oil storage cabinet, which can facilitate the operation of maintenance personnel and can compress the volume occupied by the oil storage cabinet, so that the transformer can be integrated to meet the vehicle-mounted installation space requirements. The present application specifically adopts the following technical solutions. First, in order to achieve the above-mentioned purpose, a vehicle-mounted transformer oil storage cabinet is proposed, which includes: a main oil storage cabinet, which is configured as a flat multi-prism structure, and a capsule is contained therein; a switch oil storage cabinet, which is arranged on one side end face of the outside of the main oil storage cabinet; a main air pipe, which connects and conducts the main oil storage cabinet and the transformer main body box cover, one end of which is connected to the bottom of the main oil storage cabinet, and the other end is connected to the transformer main body box cover, and the main air pipe has a slope of not less than 2° from the transformer main body box cover upward; a capsule lifting seat, which is arranged at the top of the main oil storage cabinet, is fixedly connected to the top of the capsule, and is sealed between the top of the capsule and the top of the capsule lifting seat to form a gas containing chamber; the main oil storage cabinet; a ... An oil tank breathing channel, one end of which passes through the capsule lifting seat and is connected to the inside of the capsule, and the other end extends along the top of the main oil storage tank and is connected to the desiccant installed at the lower part of the side wall of the transformer body, for adjusting the breathing state of the capsule; a vacuum channel, one end of which passes through the top of the capsule lifting seat and is connected to the gas containing chamber, and the other end extends along the top of the main oil storage tank and is connected to the valve installed at the lower part of the side wall of the transformer body, for adjusting the air pressure in the gas containing chamber; the main oil storage tank respirator channel and the vacuum channel are interconnected and communicated through a pressure balance valve in a horizontal position so as to evacuate the air at the same time and maintain a pressure balance state during evacuation.

[0006] Optionally, an on-board transformer oil storage cabinet as described in any of the above, wherein the capsule lift seat comprises: a lift seat body, which is connected to the top of the main oil storage cabinet and has an opening at the top; a capsule lift seat cover plate, which is sealed and connected to the lift seat body to close the opening; a capsule connecting flange, whose top is sealed and connected to the capsule lift seat cover plate, and whose bottom is sealed and connected to the capsule top, and a flange channel is provided inside the flange to connect to the interior of the capsule; a respirator pipe joint, whose bottom is connected to the capsule lift seat cover plate as a whole, and whose top is connected to the main oil storage cabinet breathing channel; a main oil storage cabinet vent plug, which is arranged on the capsule lift seat cover plate and at the top of the main oil storage cabinet 150 mm away from its long axis end face, and the main oil storage cabinet vent plug connects the vacuum channel and the gas containing chamber to release the gas accumulated on the top of the main oil storage cabinet.

[0007] Optionally, in a vehicle-mounted transformer oil storage cabinet as described above, a first sealing ring is arranged between the capsule lifting seat cover and the capsule connecting flange; a second sealing ring is arranged between the capsule lifting seat cover and the lifting seat body; and the second sealing ring is surrounded and arranged outside the first sealing ring.

[0008] Optionally, in any of the above-mentioned on-board transformer oil conservator, a main oil conservator respirator is also installed at the end of the main oil conservator breathing channel, and the valve installed at the end of the vacuum channel and the main oil conservator respirator are both arranged on the lower outer side of the transformer body.

[0009] Optionally, a vehicle-mounted transformer oil conservator as described in any of the above, wherein the switch oil conservator has a switch cabinet breathing channel independent of the main oil conservator, one end of which is connected to the inside of the switch oil conservator, and the other end extends to the lower part of the side wall of the transformer body, the switch cabinet breathing channel is interconnected and conducted with the main oil conservator breathing channel and the vacuum channel through a horizontally arranged pressure balancing valve, and vacuum is synchronously performed, and during the vacuuming process, the on-load switch connected to the switch oil conservator and the transformer body are kept in a pressure balance state.

[0010] Optionally, a vehicle-mounted transformer oil conservator as described in any of the above, wherein the switch cabinet breathing channel includes: a breather connecting pipe, which extends upward from the bottom of the switch oil conservator to the internal top of the switch oil conservator; a switch oil conservator breather, which is connected to the end of the breather connecting pipe and is arranged on the lower outer side of the transformer body.

[0011] Optionally, in the vehicle-mounted transformer oil conservator as described above, a switch oil conservator vent plug is provided at the top of the switch oil conservator above the respirator connecting pipe; a rain cover is provided at the front end surface of the switch oil conservator, and an oil level gauge is provided under the rain cover.

[0012] Optionally, in any of the above-described on-vehicle transformer oil conservator, a hook is provided on the top inner wall of the main oil conservator, and the capsule is hung and fixed below the capsule lifting seat by the hook.

[0013] Optionally, in a vehicle-mounted transformer oil conservator as described in any of the above, the hook is arranged at the top position of the inner wall of the main oil conservator, and a hand hole is also arranged on the top of the main oil conservator near the hook, and the hand hole is sealed by a hand hole cover; the side of the main oil conservator also has a manhole on the end face where the switch oil conservator is located and on the opposite end face, and the manhole is sealed by a manhole cover.

[0014] Optionally, in any of the above-described on-board transformer oil conservators, the hand hole cover plate on the top of the main oil conservator is further provided with electrical laminated wood on its inner wall side to prevent gas accumulation at the hand hole on the top of the oil conservator.

[0015] Beneficial Effects

[0016] The present application sets the switch oil storage cabinet separately on one side end face outside the main oil storage cabinet, which can save the materials required for the switch oil storage cabinet, and ensure that the internal structure of the main oil storage cabinet is regular, which is convenient for capsule sealing. In order to facilitate the operator to maintain the oil storage cabinet, the present application specially connects and connects the breathing channel of the main oil storage cabinet, the vacuum channel and the switch cabinet breathing channel of the switch oil storage cabinet through a pressure balance valve, and extends it along the outside of the transformer body to the lower part of the oil tank, ensuring that each respirator and valve structure at the end of the channel is at a height close to the maintenance personnel, so that the on-load switch connected to the switch oil storage cabinet and the transformer body can be in a pressure balance state during the vacuuming process, and at the same time, it also makes the transformer vacuuming and oiling, the transformer overall sealing test and subsequent maintenance operations more convenient. Therefore, the present application can design the vehicle-mounted transformer oil storage cabinet and the switch oil storage cabinet separately, which is convenient for maintenance personnel to operate and can compress the volume occupied by the oil storage cabinet, and integrate the transformer to meet the vehicle-mounted installation space requirements.

[0017] In the capsule lifting seat of the present application, a gas passage connected to the inside of the capsule is formed in the capsule connecting flange and the breathing device pipe joint, which can ensure the air tightness of the breathing passage, and two layers of sealing rings are fixed through the sealing surface between the capsule lifting seat cover plate, the capsule connecting flange and the lifting seat body to form a double-layer sealing structure. The double-layer sealing structure can enhance the sealing of the capsule during breathing, so that the capsule lifting seat is not easy to accumulate gas entering from the oil storage cabinet due to loose sealing.

[0018] The present application sets the switch cabinet breathing channel in the switch oil storage cabinet to extend upward from the bottom of the switch oil storage cabinet to the internal top of the switch oil storage cabinet, and hides the bent pipe at the end of the switch cabinet breathing channel inside the switch oil storage cabinet, so that the appearance of the connecting pipe structure of the switch oil storage cabinet is more beautiful. In addition, the present application also sets the main air pipe directly between the main oil storage cabinet and the main box cover of the transformer and forms an upward slope of not less than 2°, so that the gas escaping upward from the oil tank can be easily accumulated in the gas relay through the main air pipe, and only the bellows, butterfly valve and gas relay are set in the main air pipe, which can ensure that the length of the entire main air pipe pipeline is short, easy to arrange and does not occupy the installation space on the top of the transformer. The gas relay is exposed outside the oil storage cabinet, which can facilitate maintenance personnel to inspect and maintain. The two butterfly valves on the front and rear sides of the gas relay in the main air pipe pipeline can be closed when the transformer is short-term power outage for maintenance, and it is convenient to remove the gas relay for inspection, adjustment or repair and replacement.

[0019] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the vehicle-mounted transformer oil storage cabinet of the present application;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the capsule lifting seat in the present application;

[0023] Figure 3 is a schematic diagram of the suspension method of the capsule structure in this application;

[0024] Figure 4 is a schematic diagram of the switch oil conservator structure in this application;

[0025] Figure 5 It is a side view of the hand hole cover plate in the vehicle-mounted transformer oil storage cabinet of the present application;

[0026] Figure 6 It is a schematic diagram of the connection position relationship between the vehicle-mounted transformer oil storage cabinet and the transformer body of the present application;

[0027] Figure 7 is a cross-sectional schematic diagram of the vehicle-mounted transformer oil storage cabinet of the present application;

[0028] Figure 8 It is a top view of the welding position of the anti-gas trap U-shaped steel at the cabinet wall opening in the vehicle-mounted transformer oil storage cabinet of the present application.

[0029] In the figure, 1 represents a main oil storage tank; 11 represents a main oil storage tank float; 10 represents a capsule; 12 represents a hook; 2 represents a capsule lifting seat; 20 represents a capsule connecting flange; 21 represents a respirator pipe joint; 22 represents a capsule lifting seat cover; 23 represents a main oil storage tank vent plug; 201 represents a first sealing ring; 202 represents a second sealing ring; 31 represents a hand hole; 32 represents a manhole; 33 represents electrical laminated wood; 34 represents an anti-gas U-shaped steel; 4 represents a gas relay; 41 represents a butterfly valve at the end of the oil storage tank; 42 represents a bellows; 43 represents a butterfly valve at the end of the box cover; 44 represents a box cover connecting elbow; 5 represents a main oil storage tank respirator; 6 represents a switch oil storage tank respirator; 7 represents a switch oil storage tank; 71 represents a switch oil storage tank float; 70 represents an oil level gauge; 701 represents a rain cover; 71 represents a switch oil storage tank vent plug; 72 represents a respirator connecting pipe; 8 represents a valve; and 9 represents a transformer body. DETAILED DESCRIPTION

[0030] In order to make the purpose and technical solution of the embodiment of the present application clearer, the technical solution of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0032] The meaning of "and / or" described in this application means that the situations where each exists alone or both exist at the same time are included.

[0033] The meaning of "inside and outside" mentioned in this application refers to the vehicle-mounted transformer oil storage tank itself, where the direction from the outer shell of the main oil storage tank to the inside of the capsule is inside, and vice versa; it is not a specific limitation on the device mechanism of this application.

[0034] The term “connection” as used in this application may mean a direct connection between components or an indirect connection between components via other components.

[0035] The meaning of "up and down" in this application refers to that when the user is facing the transformer, the direction from the ground to the top of the capsule lifting seat is up, and the opposite direction is down, rather than a specific limitation on the device mechanism of this application.

[0036] Figure 1 A vehicle-mounted transformer oil storage cabinet according to the present application can be Figure 6 The method shown is arranged at the top of the transformer body, and can also be arranged on other end faces of the transformer body through a mounting bracket fixedly connected to the transformer body structure to meet the space requirements. Figure 1 Shown:

[0037] The main oil storage tank 1 is configured as a flat multi-prism structure, and contains a capsule 10 therein;

[0038] A switch oil storage cabinet 7, which is arranged on one end surface outside the main oil storage cabinet 1;

[0039] The main air pipe is arranged at the installation gap between the main oil storage tank 1 and the transformer body 9, one end of which is connected to the bottom of the main oil storage tank 1, and the other end is connected to the box cover of the transformer body 9. The main air pipe can only be provided with a bellows 42, a butterfly valve 41 at the oil storage tank end, a butterfly valve 42 at the box cover end, and a gas relay 4 connected between the two butterfly valves. The main air pipe is directly connected to the main oil storage tank 1. Figure 7 The method shown is to lead out from the bottom of the main oil storage cabinet horizontally, bend downward at a angle of not less than 2°, and then connect to the transformer body through the box cover connecting elbow 44 to ensure that the entire main air pipe line is short, easy to arrange and does not occupy the installation space on the plane of the transformer box. The pipeline can expose the gas relay outside the oil storage cabinet, which can facilitate maintenance personnel to inspect and maintain. The upward slope of not less than 2° from the transformer main box cover can make it easier for the gas escaping upward from the oil tank to accumulate in the gas relay through the main air pipe, so as to ensure that the gas relay effectively collects the gas that continuously escapes upward from the oil tank; the butterfly valve in the main air pipe can close the pipeline when repairing the gas relay, so as to facilitate the replacement and maintenance of the relay;

[0040] The capsule lifting seat 2 is arranged on the top of the main oil storage tank 1. Figure 2 The method shown is to seal and fix the top opening of the capsule 10 by embedding the mounting flange of the capsule connection port, and to seal and form a gas containing chamber between the top of the capsule and the top of the capsule lifting seat 2;

[0041] The main oil conservator breathing channel has one end passing through the capsule lifting seat 2 and communicating with the inside of the capsule 10, and the other end extending along the top of the main oil conservator 1 and connected to the desiccant installed at the lower part of the side wall of the transformer body 9, and the main oil conservator respirator 5 arranged at the lower end thereof is used to adjust the breathing state of the capsule 10 and adjust the internal air pressure of the capsule to ensure the sealing of the capsule to the insulating oil at the bottom of the main oil conservator;

[0042] The vacuum channel, one end of which passes through the top of the capsule lifting seat 2 and is connected to the gas containing chamber, and the other end of which extends along the top of the main oil storage cabinet 1 and is connected to the valve 8 installed at the lower part of the side wall of the transformer body 9. The valve 8 set at the lower end adjusts the air pressure in the gas containing chamber, discharges the gas in the gas containing chamber, and ensures the sealing of the insulating oil in the main oil storage cabinet. The vacuum channel, the main oil storage cabinet respirator channel, and the switch cabinet respirator channel of the switch oil storage cabinet can be interconnected and conducted through a horizontal pressure balance valve to facilitate the simultaneous vacuuming of the main oil storage cabinet and the switch oil storage cabinet, and to keep the pressure balance state of the on-load switch and the transformer body during vacuuming.

[0043] In a more specific implementation, the capsule lifting seat 2 can be set as Figure 2 As shown, including:

[0044] A cylindrical riser body, the bottom of which is connected to the top of the main oil storage tank 1, and the top of which is provided with an opening penetrating to the top of the main oil storage tank;

[0045] The capsule lifting seat cover plate 22 is sealed and connected with the lifting seat body to close the opening, and a gas containing chamber is formed at the top of the capsule by the capsule lifting seat cover plate and the lifting seat body;

[0046] The capsule connection flange 20 has a top that is sealed and connected to the capsule lifting seat cover plate 22, and a bottom that is bolted and embedded in a mounting flange set in the capsule connection port. The top of the capsule 10 is abutted against the lower end surface of the capsule connection flange 20 through the mounting flange to achieve a sealed connection with the end surface of the capsule structure. A flange channel extending vertically downward can be set at the inner center position of the capsule connection flange 20. The flange channel is connected to the interior of the capsule 10 through the central through hole of the mounting flange, so that the gas in the capsule can enter and exit.

[0047] The breathing apparatus pipe joint 21, whose bottom is connected to the capsule lifting seat cover 22 as a whole, and whose top is formed with a flange plate to be sealed and connected to the connecting flange at the top of the main oil storage tank breathing channel through flange bolts and other structures, providing a gas passage from the breathing channel to the inside of the capsule;

[0048] The main oil storage tank vent plug 23 is arranged on the capsule lifting seat cover 22, connecting the vacuum channel with the gas containing chamber, and extracting the gas in the gas containing chamber through the valve 8 at the bottom of the vacuum channel, so as to ensure that the insulating oil under the capsule cannot contact the air and slow down its oxidation. In addition, a main oil storage tank vent plug 23 can be respectively arranged at both ends of the top of the main oil storage tank along the center of its long axis at a distance of 150 mm from the end cover, so as to release the gas accumulated on the top of the oil storage tank when needed.

[0049] In order to further ensure the internal sealing of the capsule lifting seat, the present application may further provide a first sealing ring 201 between the capsule lifting seat cover plate 22 and the capsule connecting flange 20, and a second sealing ring 202 between the capsule lifting seat cover plate 22 and the lifting seat body. The second sealing ring 202 may be arranged outside the first sealing ring 201, thereby forming a double-layer sealing structure outside the flange channel of the capsule connecting flange 20 to further ensure the sealing performance of the main oil storage tank.

[0050] The capsule in the main oil conservator can be Figure 3The hook 12 structure shown is suspended on the top of the cabinet, and the air pressure inside the capsule is adjusted through the respirator, filling the space between the insulating oil level and the top of the main oil storage cabinet, and is sealed above the insulating oil level, blocking the insulating oil from direct contact with the air to prevent its oxidation from affecting the insulation or flow properties. One end of the hook 12 structure can be directly welded to the top inner wall of the main oil storage cabinet 1, and the other end can be provided with an upward bend to prevent the hanging ring of the capsule from sliding off the hook. The hooks can be evenly arranged on the top of the main oil storage cabinet, so that the capsule 10 can be evenly and flatly hung and fixed by the hook 12 under the top plate of the entire main oil storage cabinet.

[0051] Reference Figure 1 As shown, since the main oil storage tank in this application preferably adopts a flat octagonal prism structure, its internal space is small, and it is difficult for the staff to directly enter the cabinet for installation and maintenance. Therefore, this application can further provide a hand hole 31 near the hook 12. During normal operation, the hand hole 31 can be sealed by a hand hole cover. Considering that the top of the oil storage tank is prone to gas collection, the inner wall side of the top hand hole cover can be installed Figure 5 The electrical laminate 33 is shown to prevent air pockets in the openings.

[0052] Generally speaking, in order to evenly inflate the capsule and spread the capsule evenly to fill the top of the entire main oil storage tank, the connection port of the air inlet can be set in the middle of the top of the main oil storage tank, and the hooks 12 can be evenly set around the top of the main oil storage tank 1 to evenly spread the top of the capsule inside the oil storage tank. In this way, the gas in the breathing channel of the main oil storage tank can be evenly diffused into the capsule through the connection port in the middle of the capsule to fill the top space of the main oil storage tank, or be discharged outward from the flange channel in the capsule lifting seat 2 in the middle of the cabinet body to adapt to the rising level of the insulating oil in the main oil storage tank.

[0053] In order to facilitate personnel to perform maintenance and repair on the internal structure of the main oil conservator, the side of the main oil conservator 1 can further be provided with manholes 32 at the end face where the switch oil conservator 7 is located and the end face opposite to it, and the manholes can be sealed by manhole covers. Therefore, during maintenance and repair, the operator can climb to the top of the transformer body through a ladder, open the manhole cover, and crawl into the oil conservator through the manhole to perform maintenance and repair.

[0054] In order to ensure the insulation and sealing of the transformer on-load switch, the present application can set a switch cabinet breathing channel that is independent of the main oil conservator 1 for the switch oil conservator 7 connected to the transformer on-load switch. Figure 4The breathing apparatus connecting pipe 72 extends upward from the bottom of the switch oil conservator 7 to the internal top of the switch oil conservator 7 to connect with the gas containing space at the top of the liquid surface of the switch oil conservator 7, and the other end extends downward to the lower part of the side wall of the transformer body 9. The switch oil conservator breathing apparatus 8 arranged at the end of the switch cabinet breathing channel is used to adjust the internal oil pressure of the switch oil conservator 7 independently of the capsule 10.

[0055] Similar to the main oil storage tank, the switch oil storage tank 7 can also be provided with a vent plug 71 at the top for exhaust. Figure 4 For example, the vent plug 71 can be selectively arranged above the respirator connecting pipe 72. In order to timely display the capacity of the insulating oil in the switch oil conservator 7, the switch oil conservator can further be provided with an oil level gauge 70 on its outer end surface. A rain cover 701 can be further provided on the upper side of the oil level gauge at the front end surface of the switch oil conservator to provide protection.

[0056] In other implementations, the above-mentioned oil conservator structure can be directly arranged horizontally on the transformer box cover, and the switch oil conservator is arranged at one end of the main oil conservator near the transformer on-load switch head cover. The position of the switch oil conservator can also be flexibly adjusted according to the actual space on the box cover.

[0057] The wall of the main oil storage tank is designed to be octagonal, which is easy to process and manufacture and matches the shape of the capsule. A flange is welded on one end of the main oil storage tank and a detachable cover is installed, and the other end is directly welded to the end cover of the main oil storage tank. The main oil level gauge and its rain cover flange are welded on the outside of the detachable cover, and a manhole flange and cover are welded on the other side to facilitate installation and subsequent maintenance and repair.

[0058] In the main oil conservator, a switch oil conservator is also welded on the welded cover plate, and the welded cover plate side of the oil conservator is usually arranged on the side of the on-load switch of the main transformer. The welding position of the switch oil conservator matches the position of the on-load switch head cover, and should not occupy the upper space of the on-load switch head cover, so as to facilitate the subsequent inspection and maintenance of the on-load switch, and as close as possible to the RSQ pipe led out of the on-load switch head cover, so that the connection pipe from the switch oil conservator to the on-load switch head cover is simpler.

[0059] Another manhole flange and cover plate can be welded on one side of the switch oil conservator on the welded cover plate of the main oil conservator. This manhole is diagonally distributed with the manhole on the opposite detachable cover plate, so as to facilitate observation and installation of the oil level gauge and capsule from both sides.

[0060] A capsule riser is installed on the top of the main oil storage cabinet, and the mounting flange of the capsule is connected to the flange of the capsule riser. The capsule flange of the main oil storage cabinet adopts a double sealing structure, which strengthens the sealing of the capsule during breathing, so that the capsule riser is not easy to accumulate gas entering the oil storage cabinet due to loose sealing. The cover plate of the capsule riser is installed with a desiccant pipe and a vacuum pipe, which are connected to the pipeline and led to the lower part of the transformer body where people can easily operate, and finally connected to the desiccant and valve.

[0061] There are vent plugs at both ends of the top of the main oil storage cabinet to facilitate the discharge of gas during installation and maintenance.

[0062] The top of the main oil storage tank is also welded with diagonally distributed hand holes, located near the capsule hook, to facilitate the installation and inspection of the capsule. Electrical laminated wood 33 can be installed under the hand hole cover to prevent air from accumulating at the opening.

[0063] A lifting handle for installing or disassembling the oil storage tank is welded on the top of the main oil storage tank body.

[0064] The lower part of the main oil storage tank body is welded with cabinet feet for supporting the oil storage tank body, and the cabinet feet are symmetrically distributed with respect to the center plane of the minor axis of the oil storage tank.

[0065] A DN80 elbow is welded near the end of the lower part of the main oil storage cabinet as the main air pipe for connecting with the transformer oil tank. The main air pipe rises from the lower box wall to a certain height, and two symmetrical φ10 small holes are opened on the top wall of the main air pipe to balance the airflow to prevent the capsule from being sucked in and broken when the main oil storage cabinet is vacuumed. The main air pipe is connected to the bellows and gas relay in turn. Butterfly valves are installed at both ends of the gas relay to facilitate the removal of the gas relay during maintenance. Then it is connected to the oil tank cover through the elbow on the box cover. The length of the entire main connecting pipe is short, and the gas relay is exposed outside the oil storage cabinet, which is easy to inspect and maintain.

[0066] An oil filling and draining pipe is welded at the bottom of the main oil storage cabinet, and the connecting pipe is led to a place at the bottom of the transformer body that is easy for people to operate, and finally connected to the valve.

[0067] All the wall openings on the top of the main oil storage tank are Figure 8 The method shown is to weld an anti-gas trap U-shaped steel to avoid the problem of gas trapping at the opening.

[0068] The main conservator oil level gauge consists of three main parts: an external dial that can be mounted on the oil level gauge flange of the end cover, an internal connecting rod with one end connected to the external dial and the other end extending obliquely upward into the conservator and connected to the main conservator float 11. The capsule and transformer oil will expand or contract with changes in temperature, and the connecting rod and float are located below the capsule, and will swing up and down with changes in the capsule and oil level, and the oil level will be displayed on the external dial.

[0069] The cross section of the switch oil conservator cabinet is circular, one end is welded to the cover of the main oil conservator, and the other end is welded with a flange and a detachable cover. The center of the detachable cover is welded with an oil level gauge and its rain cover flange.

[0070] The switch gas relay connecting pipe, desiccant connecting pipe and oil filling and draining pipe are welded in the shape of a finished product under the switch oil conservator cabinet. The gas relay connecting pipe is connected to the gas relay on the on-load switch head cover, and the desiccant connecting pipe extends to the top of the switch oil conservator. The desiccant connecting pipe and the oil filling and draining pipe are connected by pipelines to the lower part of the transformer body where people can easily operate, and finally connected to the desiccant and valve respectively.

[0071] The oil level gauge in the switch conservator mainly consists of three parts: the external dial, which is mounted on the oil level gauge flange of the end cover; the internal connecting rod is divided into two parts, one end of which is connected to the external dial and extends horizontally into the oil conservator, and the other end is connected to the switch conservator float 71 and is connected to the dial vertically. The oil inside the on-load switch will expand or contract with the change of temperature, and the float will rotate perpendicular to the cylindrical axis of the switch conservator with the change of oil level.

[0072] To facilitate maintenance personnel to operate and maintain, the main oil conservator breather 5, valve 8 and switch oil conservator breather 6 in the above oil conservator structure can be led out from the top of the transformer body through corresponding channel pipelines and arranged on the lower outer side of the transformer body 9.

[0073] In summary, the present application solves the problem of limited use capacity of traditional oil conservators due to the large height space occupied by the main oil conservator and the switch oil conservator by designing them separately and placing them independently, and compressing the shape of the main oil conservator into a flat multi-prism structure, and makes the inspection and maintenance of on-load switches more convenient. The oil conservator of the present application can make the height of the transformer body smaller, and on the premise of meeting road driving requirements and vehicle size standards, it can be integrated with the transformer body and arranged on a vehicle, which is easy to install. The present application re-optimizes the design of the oil conservator pipeline, making the pipeline layout simple and beautiful, easy to install, and quick and convenient to use and maintain. It is particularly noteworthy that in the present application:

[0074] 1. The capsule lifting seat cover plate in the capsule lifting seat is enclosed with a double sealing structure, which can enhance the sealing of the capsule during breathing, so that the capsule lifting seat is not easy to accumulate gas entering from the oil storage cabinet due to loose sealing.

[0075] 2. The main oil conservator adopts an octagonal shape, and the switch oil conservator adopts a circular structure. This application is different from the usual solution of setting the main body of the vehicle-mounted oil conservator and the switch oil conservator to the same shape. It can not only reduce the amount of materials used and the volume space occupied by the switch oil conservator, but also move the layout of the switch oil conservator according to the position of the on-load switch head cover, which is convenient for the inspection and maintenance of the on-load switch. In addition, the connection method of the switch oil conservator directly welded to the end cover plate strengthens the structural strength of the end cover plate.

[0076] 3. In this application, the main air pipe is only connected to the bellows and the gas relay. Butterfly valves are installed at both ends of the gas relay, and then it is directly led to the transformer box cover. The length of the entire main air pipe is short, and the gas relay is exposed outside the oil storage cabinet, which is easy to disassemble, inspect and maintain.

[0077] 4. The breathing channel of the main oil conservator, the vacuum channel and the breathing channel of the switch oil conservator can be connected together through the pressure balance valve, and extend along the outside of the transformer body to the lower part of the oil tank, ensuring that the respirators and valve structures at the end of the channel are at a height close to the maintenance personnel, making the transformer vacuum oil filling, transformer overall sealing test and subsequent maintenance operations more convenient.

[0078] 5. In the present application, all the wall openings on the top of the oil storage cabinet are welded with anti-gas trap U-shaped steel, and electrical laminated wood is installed under the top hand hole cover. These measures can effectively avoid the problem of gas traps at the top openings of the oil storage cabinet.

[0079] 6. The present application eliminates the dirt collection box commonly used in oil storage cabinets. The main air pipe of the present application rises from the lower transformer box wall to a certain height, and two symmetrical φ10 small holes are opened on the top wall of the main air pipe to balance the airflow, which can prevent the capsule from being sucked in and broken when the main oil storage cabinet is evacuated.

[0080] 7. Installing a valve at the gas relay where the switch oil conservator is connected to the on-load switch head cover can facilitate subsequent inspection and maintenance of the switch.

[0081] The above is only an implementation method of the present application, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present application. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application.

Claims

1. A vehicle-mounted transformer oil storage cabinet, characterized in that: include: A main oil storage tank (1) is configured as a flat multi-prism structure, and contains a capsule (10) therein; A switch oil conservator (7) is arranged on one side end surface outside the main oil conservator (1); the switch oil conservator (7) has a switch cabinet breathing passage independent of the main oil conservator (1), one end of which is connected to the inside of the switch oil conservator (7) and the other end of which extends to the lower part of the side wall of the transformer body (9); A main air pipe connecting and conducting the main oil storage tank (1) and the transformer body (9), one end of which is connected to the bottom of the main oil storage tank (1) and the other end of which is connected to the transformer body (9), and the main air pipe has a slope of not less than 2° from the transformer body (9) upward; A capsule lifting seat (2) is arranged at the top of the main oil storage tank (1), fixedly connected to the top of the capsule (10), and sealed between the top of the capsule and the top of the capsule lifting seat (2) to form a gas containing chamber; A main oil storage tank breathing channel, one end of which passes through the capsule lifting seat (2) and is connected to the inside of the capsule (10), and the other end of which extends along the top of the main oil storage tank (1) and is connected to a desiccant installed at the lower part of the side wall of the transformer body (9), for adjusting the breathing state of the capsule (10); A vacuum channel, one end of which passes through the top of the capsule lifting seat (2) and is connected to the gas containing chamber, and the other end of which extends along the top of the main oil storage cabinet (1) and is connected to a valve installed at the lower part of the side wall of the transformer body (9) for adjusting the gas pressure in the gas containing chamber; The switch cabinet breathing channel is interconnected with the main oil storage cabinet breathing channel and the vacuum channel through a horizontally arranged pressure balance valve, and vacuum is synchronously drawn. During the vacuum process, the on-load switch connected to the switch oil storage cabinet (7) and the transformer body are kept in a pressure balance state.

2. The vehicle-mounted transformer oil conservator as claimed in claim 1, characterized in that: The capsule lifting seat (2) comprises: A riser body connected to the top of the main oil storage tank (1) and having an opening at the top; A capsule lifting seat cover plate (22) which is sealed with the lifting seat body and closes the opening; A capsule connecting flange (20), the top of which is sealedly connected to the capsule lifting seat cover (22), the bottom of which is sealedly connected to the top of the capsule (10), and a flange channel is provided inside the flange to communicate with the interior of the capsule (10); A breathing apparatus pipe joint (21), the bottom of which is connected to the capsule lifting seat cover (22) as a whole, and the top of which is connected to the main oil storage tank breathing channel; A main oil storage tank vent plug (23) is arranged on the capsule lifting seat cover (22) and at a position 150 mm from the top of the main oil storage tank to the end face of its long axis. The main oil storage tank vent plug (23) connects the vacuum channel and the gas containing chamber and is used to release the gas accumulated on the top of the main oil storage tank.

3. The vehicle-mounted transformer oil conservator as claimed in claim 2, characterized in that: A first sealing ring (201) is provided between the capsule lifting seat cover plate (22) and the capsule connecting flange (20); A second sealing ring (202) is provided between the capsule lifting seat cover plate (22) and the lifting seat body; The second sealing ring (202) is arranged outside the first sealing ring (201) and surrounds the first sealing ring (201).

4. The vehicle-mounted transformer oil conservator as claimed in claim 2, characterized in that: A main oil conservator breather (5) is also installed at the end of the main oil conservator breathing channel, and the valve (8) installed at the end of the vacuum channel and the main oil conservator breather (5) are both arranged on the lower outer side of the transformer body (9).

5. The vehicle-mounted transformer oil conservator as claimed in claim 1, characterized in that: The switch cabinet breathing passage comprises: a respirator connecting pipe (72) extending upward from the bottom of the switch oil conservator (7) to the inner top of the switch oil conservator (7); The switch oil storage cabinet breather (6), the end of which is connected to the breather connection pipe (72), is arranged on the lower outer side of the transformer body (9).

6. The vehicle-mounted transformer oil conservator as claimed in claim 1, characterized in that: The top of the switch oil conservator (7) is also provided with a switch oil conservator vent plug (71) above the respirator connecting pipe (72); The front end surface of the switch oil storage cabinet (7) is also provided with a rain cover (701), and an oil level gauge (70) is also provided under the rain cover (701).

7. The vehicle-mounted transformer oil conservator as claimed in claim 1, characterized in that: A hook (12) is provided on the top inner wall of the main oil storage cabinet (1), and the capsule (10) is suspended and fixed below the capsule lifting seat (2) by the hook (12).

8. The vehicle-mounted transformer oil conservator as claimed in claim 7, characterized in that: The hook (12) is arranged at the top position of the inner wall of the main oil storage tank (1), and a hand hole (31) is also arranged on the top of the main oil storage tank (1) near the hook (12), and the hand hole is sealed by a hand hole cover plate; The side of the main oil storage cabinet (1) is also provided with a manhole (32) on the end face where the switch oil storage cabinet (7) is located and on the end face opposite to it, and the manhole is sealed by a manhole cover plate.

9. The vehicle-mounted transformer oil conservator as claimed in claim 8, characterized in that: The hand hole cover plate on the top of the main oil storage tank is also provided with electrical laminated wood (33) on its inner wall side.

Images