Transformer with height-adjustable oil conservator

Abstract

The utility model provides a transformer with a height-adjustable oil conservator, which comprises an oil tank, a height-adjustable oil conservator and a height-adjustable oil conservator, the bracket is mounted on the mounting seat of the top cover; the oil conservator is fixed on the bracket, so that the oil conservator is supported above the oil tank through the bracket; two ends of the oil pipeline are respectively connected to the top cover of the oil tank and the oil conservator; wherein the bracket is an adjustable bracket, and the adjustable bracket is arranged to fix the oil conservator at a first height or a second height higher than the first height relative to a top cover of the oil tank; and the oil pipeline is flexible so as to allow the oil conservator to maintain fluid communication with the oil tank when the oil conservator is adjusted between the first height and the second height. The transformer disclosed by the utility model is provided with the height-adjustable oil conservator, so that the transformer can have a relatively low assembly height during transportation.

Description

Technical Field

[0001] The present invention belongs to the technical field of transformers, and in particular relates to a transformer with a height-adjustable oil storage cabinet. Background Art

[0002] With the development of industrialization and urbanization, the reliable supply of electricity has become increasingly important. As a new type of substation equipment, box-type substations have attracted more and more attention due to their flexibility and portability. Existing substations include fixed substations and vehicle-mounted mobile substations. Fixed substations are usually fixed to specific working positions after being transported to the installation site. Their installation and commissioning are cumbersome and require a certain amount of land resources. At the same time, since they cannot be moved quickly, they are not suitable for special needs such as emergency repairs and temporary power supply. In contrast, mobile substations have the advantages of portability and flexibility, making them an ideal choice for emergency power supply and temporary power supply. They can be quickly deployed to places where power supply is needed, providing reliable power supply support for temporary and temporary power use. For example, in special circumstances such as natural disasters or construction sites, mobile substations can quickly provide power supply to ensure basic living and production needs.

[0003] In mobile substations, oil-immersed transformers are commonly used. Oil-immersed transformers are a type of transformer that uses transformer oil for cooling and insulation, and its core windings are immersed in transformer oil. This design can provide good insulation and cooling effects, allowing the transformer to work stably and reliably under high load operation. The transformer is the heart of the substation, and there are strict regulations for its transportation process. If the transformer is too large in size and has a correspondingly large weight, the braking, acceleration or turning of the car will easily generate a large inertial force, which will lead to the loosening of some connection structures and the extrusion, deformation or even rupture of weak parts. Especially for oil-immersed transformers, it is also necessary to prevent transformer oil leakage caused by various factors during transportation.

[0004] In oil-immersed transformers, the size and installation height of the oil conservator are important aspects that affect the overall size of the transformer. The oil conservator, commonly known as the oil pillow, is usually a cylindrical container that is laterally supported at a specific height above the oil tank via a fixed bracket and connected to the oil tank of the transformer by a pipe. It plays the role of storing oil and replenishing oil in the oil tank. During use, the transformer oil in the transformer tank may expand or contract due to temperature changes, or the transformer oil may be lost due to leakage, thereby changing the volume of the transformer oil. When the transformer oil expands due to heat, the oil flows from the oil tank to the oil conservator; when the transformer oil shrinks due to cold, the oil flows from the oil conservator to the oil tank, thereby ensuring that the transformer oil in the transformer tank is always full. In addition, the oil conservator must also isolate the transformer oil from air and moisture to prevent the transformer oil from oxidizing or affecting the insulation due to the increase of moisture.

[0005] In order to ensure that the oil conservator can normally perform the functions of oil replenishment and oil storage, the size of the oil conservator and the height of the oil conservator bracket must meet the minimum requirements for normal operation. This means that if the power of the transformer is larger, the volume of the oil conservator required will be larger and the height of the oil conservator will be higher, so the overall installation height of the transformer will be higher. During transportation, larger oil conservators and higher brackets are prone to deformation, loosening, or even tearing of brackets, oil conservators, and various pipelines and functional components due to the inertial force generated by bumps, braking or acceleration, and sharp turns. In addition, the height of the transformer is also subject to the control of vehicle height by the national transportation department and the height restrictions of bridges, culverts, etc. Once the height exceeds the limit, it will be impossible to transport. It is precisely because of the above-mentioned restrictions on the transportation height of the transformer that compared with fixed box-type substations, mobile substations usually have limited capacity and low power.

[0006] Therefore, under the premise of meeting the necessary functions of the oil conservator, the structural height of the oil conservator should be reduced as much as possible. On the one hand, it can reduce the inertia force during transportation, enhance its transportation stability and prevent transportation damage. On the other hand, it can meet the height restrictions of transportation and on the other hand, it can also increase the power of the transformer as much as possible within the limited height range.

[0007] In order to reduce the structural height of the oil storage tank, existing improvement methods include changing the oil storage tank from a cylindrical shape to an elliptical or rectangular shape to reduce the height of the oil storage tank as much as possible while ensuring that the volume remains unchanged, or designing the vehicle cargo platform carrying the transformer into a concave structure. Such improvement methods make significant changes to the existing structure. The oil storage tank needs to be specially designed in shape and size according to the capacity of the transformer, which has high manufacturing costs. The concave structure of the vehicle cargo platform is also expensive because it involves the modification of the entire trailer structure. In addition, the above scheme has limited contribution to height reduction, and the existing structure is greatly modified and cannot be restored. If the improved oil storage tank and trailer are applied to transformers of other specifications, there may be situations where the structure, shape or size are not compatible. Therefore, it is necessary to provide a highly adaptable and cost-saving solution.

[0008] In addition, most of the existing oil conservators are directly welded on the bracket, and the lower end of the bracket is installed to the oil tank via screws. When the oil conservator needs to be replaced or repaired, the oil conservator needs to be removed together with the bracket, which is cumbersome and not conducive to cost saving.

[0009] Furthermore, a gas relay is provided under the oil conservator, and the gas relay is in fluid communication with the oil tank and the oil conservator through a rigid metal elbow. Due to the presence of the rigid metal elbow, when assembling and disassembling the oil conservator or adjusting the height of the oil conservator, the metal elbow needs to be disassembled together, so the oil in the oil conservator needs to be drained to prevent the oil in the oil conservator from leaking from the joint of the metal elbow. After the transformer is transported to the destination and the oil conservator, gas relay and metal elbow are installed in place, the oil conservator can be filled with oil. Since the transformer needs to be left alone for a period of time after oil filling on site before it can be put into use, this reduces the efficiency of the mobile transformer to a certain extent.

[0010] In addition, this method of rigid connection using metal elbows requires that the elbows themselves, connectors, and oil storage cabinet brackets all have high dimensional accuracy, and the installation stress is large, which is prone to oil leakage. Especially when the transformer is transported over a long distance and the road conditions are bad, the bolts of various connecting parts may loosen during the journey, causing the rigid deformation or cracking of the metal elbows connecting the oil storage cabinet and the gas relay, and between the gas relay and the oil tank, resulting in oil leakage in the seal. Utility Model Content

[0011] The technical problem to be solved by the present disclosure is to provide a transformer with a height-adjustable oil conservator, which at least partially eliminates the defects of the prior art.

[0012] The first technical problem to be solved by the present disclosure is to provide a transformer with a height-adjustable oil conservator, which can be transported at a lower assembly height.

[0013] The second technical problem to be solved by the present disclosure is to provide a transformer with a height-adjustable oil conservator, which can reduce the assembly height at a relatively low cost.

[0014] The third technical problem to be solved by the present disclosure is to provide a transformer with a height-adjustable oil conservator, which can reduce the assembly height in a manner generally applicable to existing designs.

[0015] The fourth technical problem to be solved by the present disclosure is to provide a transformer with a height-adjustable oil storage cabinet, which can reduce component damage and oil leakage during transportation.

[0016] The fifth technical problem to be solved by the present disclosure is to provide a transformer with a height-adjustable oil storage cabinet, which can have the largest possible capacity and voltage within a limited height range.

[0017] The sixth technical problem to be solved by the present disclosure is to provide a transformer with a height-adjustable oil conservator, which can adjust the height of the oil conservator without draining oil, thereby improving the operation efficiency of the transformer.

[0018] The seventh technical problem to be solved by the present disclosure is to provide a transformer with a height-adjustable oil storage cabinet, which can reduce the installation accuracy requirements and facilitate assembly and disassembly.

[0019] To solve at least one of the above technical problems, according to one aspect of the present disclosure, a transformer is provided, comprising: an oil tank, the oil tank comprising a tank body and a top cover located on the top of the tank body; a bracket, the bracket being mounted on a mounting seat of the top cover; an oil conservator, the oil conservator being fixed on the bracket so as to be supported above the oil tank via the bracket; an oil pipeline, the two ends of the oil pipeline being respectively connected to the top cover and the oil conservator, characterized in that the bracket is an adjustable bracket, the adjustable bracket is configured to fix the oil conservator at a first height or a second height higher than the first height relative to the top cover of the oil tank; and the oil pipeline is flexible to allow the oil conservator to maintain fluid communication with the oil tank when adjusting between the first height and the second height.

[0020] In the present disclosure, by adopting an adjustable bracket, the height of the oil storage cabinet can be adjusted, so the transformer can be transported at a lower height, thereby effectively eliminating the obstacles to the transportation and transfer of the vehicle-mounted substation caused by transportation height restrictions or height restriction facilities on the road, and shortening the transportation time of the substation.

[0021] In addition, in the present disclosure, since the height of the transformer is adjustable, the overall height can be lowered before transportation, which is beneficial to reducing the inertial force generated by the bumps, braking, acceleration or turning of the car during transportation, thereby reducing the adverse consequences such as the transformer tilting or tipping, structural loosening, and squeezing, deformation, and even tearing damage of weak parts (especially the bracket and oil storage cabinet and the pipes and parts connected thereto) caused by the inertial force, thereby effectively reducing the damage of parts during transportation.

[0022] In addition, in the present disclosure, since the transformer has a height-adjustable oil storage cabinet, the overall height can be lowered before transportation. Under the condition that the height limit remains unchanged, the upper limit of the capacity of the transformer allowed to be transported can be increased. Therefore, the power of the vehicle-mounted substation can be increased to a certain extent, and the capacity and voltage upper limit of the mobile substation can be improved.

[0023] Furthermore, in the present disclosure, since the oil pipeline is flexible, the height of the oil conservator can be adjusted without draining the transformer oil in the oil conservator, which reduces the on-site oil filling and static storage time, allowing the transformer to be put into operation quickly, thereby improving the transformer operation efficiency.

[0024] Moreover, in the present disclosure, due to the height-adjustable oil storage cabinet, the overall height of the transformer can be lowered before transportation, thereby enhancing transportation stability; at the same time, the flexible pipe is not prone to installation stress during installation, thereby reducing the possibility of loosening of the connection during transportation, thereby reducing oil leakage during transportation.

[0025] Further, the adjustable bracket is configured as a detachable bracket, comprising: a fixed part, which is arranged on the oil conservator; and a detachable part, which connects the fixed part and the mounting seat in a detachable manner, wherein, when the detachable part is in a detached state, the oil conservator can be fixed at a first height by connecting the fixed part to the mounting seat; and when the detachable part is in an assembled state, the oil conservator can be fixed at a second height by the adjustable bracket.

[0026] Optionally, the detachable part and the fixed part are plug-connected to each other and fixed via a detachable fastener.

[0027] Alternatively, the detachable part and the fixed part are connected and fixed via a flange.

[0028] Alternatively, the adjustable bracket is a lifting bracket, which includes: a pallet fixed to the bottom of the oil conservator; a base fixed to the top of the oil tank; a lifting assembly, through which the pallet is connected to the base to support the movement of the oil conservator between a first height and a second height; and a locking mechanism, which is used to lock the lifting assembly to keep the oil conservator at the first height or the second height.

[0029] Furthermore, the lifting assembly may include: a plurality of pillars, the lower ends of which are fixed on a base; and a plurality of sliding sleeves, which are fixed on a support platform and respectively sleeved on one of the plurality of pillars, each sliding sleeve being configured to slide in a vertical direction on the plurality of pillars and to be locked in position by a locking mechanism.

[0030] Furthermore, the lifting assembly further comprises a driving mechanism, which is connected to the plurality of sliding sleeves to drive the plurality of sliding sleeves to slide on the plurality of pillars in a vertical direction, wherein the driving mechanism comprises a power input device and a transmission device, and the power input device may comprise at least one of a manual wheel and a motor. By making the lifting assembly equipped with a driving mechanism, the height of the oil storage cabinet can be adjusted anytime and anywhere in an emergency, without being restricted by the site or location.

[0031] Optionally, the lifting assembly is driven by an external driving device, which may include a jack or a lifting device. The lifting assembly does not have its own driving mechanism, which is conducive to simplifying the structure of the lifting bracket, reducing manufacturing costs, and the volume, specifications and type of the driving mechanism are not limited by the lifting assembly.

[0032] Further, each sliding sleeve includes a plurality of threaded holes, and the locking mechanism includes screws that cooperate with the plurality of threaded holes, wherein the plurality of threaded holes and the screws are arranged so that when the oil conservator is lowered to a first height or raised to a second height, the oil conservator can be fixed at the first height or the second height by tightening the screws through the plurality of threaded holes.

[0033] Optionally, each support column may further include a plurality of positioning holes corresponding to the plurality of threaded holes, wherein the plurality of threaded holes, the plurality of positioning holes and the screws are arranged such that when the oil conservator is lowered to the first height or raised to the second height, the screws are passed through the threaded holes and the positioning holes and tightened, so that the oil conservator can be fixed at the first height or the second height. Compared with the solution without positioning holes, the positioning holes are provided to improve the firmness of the assembly.

[0034] In the present disclosure, the adjustable bracket has a simple structure and low improvement cost, so the assembly height of the transformer can be reduced at a relatively low cost.

[0035] In addition, in the present disclosure, the adjustable bracket has strong adaptability and can be widely applied to any type of oil storage tank without being restricted by the shape and structure of the oil storage tank. In the case where the height restriction condition is extremely harsh and the overall height needs to be greatly reduced, the adjustable bracket can be used together with the existing oval or flat oil storage tank and the concave vehicle cargo platform, thereby minimizing the overall height of the transformer.

[0036] Furthermore, the transformer according to the present disclosure also includes a gas relay connected to the oil pipeline; wherein the oil pipeline includes: a first pipeline portion, the first pipeline portion connecting the oil storage cabinet and the gas relay, and a second pipeline portion connecting the gas relay and the oil tank, wherein the first pipeline portion is flexible.

[0037] In the present disclosure, in the process of adjusting the height of the oil storage cabinet, the adjustable bracket has a simple structure and is easy to operate. Because the oil pipeline includes a flexible part, the installation accuracy requirement is reduced, and it will not interfere with and restrict the height adjustment of the oil storage cabinet, thereby simplifying the operating steps of the height adjustment process and facilitating assembly and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The features and advantages of one or more embodiments of the present invention will become more easily understood through the following description with reference to the accompanying drawings. The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. The drawings are not drawn to scale and some features may be enlarged or reduced to show the details of specific components. In the drawings:

[0039] Figure 1 is a schematic diagram of the working state of a transformer with a height-adjustable oil conservator according to the first embodiment of the present disclosure;

[0040] Figure 2 yes Figure 1 A schematic diagram of a transportation state of a transformer with a height-adjustable oil conservator according to the first embodiment shown;

[0041] Figure 3 is a schematic diagram of the working state of a transformer with a height-adjustable oil conservator according to the second embodiment of the present disclosure;

[0042] Figure 4 yes Figure 3 The schematic diagram of the transportation state of the transformer with the height-adjustable oil conservator of the second embodiment is shown.

[0043] Description of Figure Numbers:

[0044] 100. Transformer;

[0045] 10. Fuel tank; 12. Box body; 14. Top cover;

[0046] 16. Mounting seat;

[0047] H1, first height; H2, first height;

[0048] 20A, removable bracket; 22, fixed part; 24, removable part;

[0049] 20B, lifting bracket; 25, support platform; 26, base;

[0050] 27. Lifting assembly;

[0051] 270, support column; 270a, positioning hole

[0052] 272, sliding sleeve 272a, threaded hole

[0053] 28a. Screws

[0054] 30. Oil storage cabinet;

[0055] 40. Oil pipeline 40a. First pipeline section; 40b. Second pipeline section;

[0056] 50. Gas relay. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0058] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well.

[0059] Figure 1 and Figure 2 is a schematic diagram of a transformer 100 with a height-adjustable oil conservator according to a first embodiment of the present disclosure.

[0060] See also Figure 1 The transformer according to the first embodiment of the present disclosure is an oil-immersed transformer 100, which at least includes: an oil tank 10, the oil tank 10 includes a box body 12 and a top cover 14 arranged on the top of the box body 12, an iron core and a winding (not shown) are arranged in the box body 12 and filled with transformer oil; a bracket, the bracket is fixed to the mounting seat 16 of the top cover 14 via bolts; a cylindrical oil conservator 30, which is mounted on the bracket, so as to be supported above the oil tank 10 via the bracket; an oil pipeline 40, the two ends of which are respectively connected to the oil tank 10 and the oil conservator 30 to achieve fluid communication between the oil tank 10 and the oil conservator 30, when the oil in the oil tank 10 becomes hot and expands, the overflowed oil can flow from the oil tank 10 to the oil conservator 30 via the oil pipeline; when the oil in the oil tank 10 becomes cold and shrinks, the oil can flow back to the oil tank 10 from the oil conservator 30 via the oil pipeline 40 by gravity.

[0061] Compared with the existing design, the utility model is special in that the oil conservator bracket according to the embodiment of the utility model is designed as a height-adjustable bracket. When the overall height of the transformer 100 needs to be lowered, the oil conservator 30 can be lowered to a lower height (first height H1) by lowering the height of the bracket, thereby lowering the overall height of the transformer 100. In normal working conditions, the adjustable bracket can keep the oil conservator 30 at the height (second height H2) required for normal operation. The height-adjustable bracket according to the utility model is very advantageous. The advantages of the utility model will be described below by taking the detachable bracket 20A of the transformer 100 of the first embodiment of the utility model as an example.

[0062] Specifically, see Figure 1 In the first embodiment, the adjustable bracket is a detachable bracket 20A, which includes a fixed portion 22 and a detachable portion 24. The fixed portion 22 is firmly fixed to the bottom of the oil conservator 30 by welding, for example, and the detachable portion 24 is detachably connected between the fixed portion 22 and the mounting seat 16. With this detachable bracket 20A, when the transformer 100 needs to be transported, the detachable portion 24 can be disconnected from the fixed portion 22 and the mounting seat 16, and then the fixed portion 22 can be directly connected to the mounting seat 16, thereby fixing the oil conservator 30 at a lower first height H1 (see Figure 2 ); After the transformer 100 is transported to the work site, the detachable part 24 can be assembled between the fixed part 22 and the mounting base 16, so that the oil conservator 30 is fixed at a second height H2 that meets the normal working requirements (see Figure 1 ).

[0063] In practical applications, for transformers 100 with large capacity and power, the normal operating height is likely to exceed the limited height. According to the utility model, the detachable part 24 of the transformer 100 can be removed before transportation or when encountering height-limited facilities, thereby significantly reducing the height of the oil storage cabinet 30, thereby effectively reducing the overall height of the transformer 100. The limited height may come from the management regulations of the national transportation department on vehicle height, special requirements of special sections of roads, or special transportation facilities, such as bridges, culverts, etc., on the height restrictions on vehicle-borne objects. This effectively eliminates the obstacles to the transportation and transfer of vehicle-mounted substations caused by transportation height restrictions or height-limited facilities on the road, shortens the transportation time of the substation, and provides reliable power support for temporary and temporary electricity use.

[0064] In addition, the transformer 100 according to the utility model reduces the overall height during transportation by removing the detachable part 24 before transportation, which is helpful to reduce the inertial force generated by the bumps, braking, acceleration or turning of the car during transportation, thereby reducing the adverse consequences such as the transformer tilting or tipping, structural loosening and squeezing, deformation and even tearing damage of weak parts (especially the bracket and oil storage cabinet and the pipes and parts connected thereto) caused by the inertial force. This improvement effect is particularly obvious for transformers with larger size and heavier weight.

[0065] Accordingly, since the transformer 100 according to the utility model can temporarily lower the transportation height by removing the detachable part 24, the upper limit of the capacity of the transformer allowed to be transported is increased while the height limit remains unchanged. Therefore, the power of the vehicle-mounted substation can be increased to a certain extent, and the capacity and voltage upper limit of the mobile substation can be increased.

[0066] In addition, the detachable bracket 20A included in the transformer 100 according to the utility model has a simple structure, low improvement cost, and convenient operation, and can be widely applied to any type of oil storage cabinet, without being restricted by the shape and structure of the oil storage cabinet. For example, when the height restriction condition is extremely harsh and the overall height needs to be greatly reduced, the original fixed bracket can be replaced with the adjustable bracket as described in the utility model while utilizing the existing oval or flat oil storage cabinet and the concave vehicle cargo platform, thereby reducing the overall height of the transformer to the maximum extent. Therefore, the detachable bracket 20A provides a cost-saving, highly adaptable, simple and easy solution for reducing the transportation height of the transformer.

[0067] In addition, as mentioned above, in the prior art, when the oil conservator needs to be replaced or repaired, the oil conservator needs to be removed together with the bracket, which is cumbersome. However, the detachable bracket 20A according to this embodiment allows only the oil conservator and the fixed part 22 fixed to the oil conservator to be removed, without removing the entire bracket together with the oil conservator, which reduces the difficulty of operation and the detachable part 24 of the detachable bracket 20A can be kept and reused, saving costs.

[0068] In the detachable bracket 20A, in order to minimize the height of the oil storage cabinet 30 during transportation, the fixing portion 22 can be designed to have the smallest possible height. Accordingly, the mounting seat 16 on the top cover 14 of the oil tank 10 can be a boss fixed or integrally formed on the top cover 14, or a threaded hole directly formed on the top cover 14, so that the fixing portion 22 has the smallest possible height when directly connected to the mounting seat 16.

[0069] In the first embodiment of the utility model, the detachable connection can be made in any suitable manner. For example, as a possible manner, the two ends of the detachable part 24 can be respectively connected to the fixed part 22 and the mounting seat 16 by inserting. In this case, for example, the fixed part 22 can be formed as a protruding shaft, and the top of the detachable part 24 is formed with a groove or an orifice matching the protruding shaft, and the fixed part 22 and the detachable part 24 can be detachably connected by the cooperation of the protruding shaft and the groove or the orifice; accordingly, the mounting seat 16 is also formed with a groove or an orifice matching the protruding shaft of the fixed part 22, and during transportation, the fixed part 22 and the mounting seat 16 are detachably connected by the cooperation of the protruding shaft and the groove or the orifice, and at this time, the bottom end of the detachable part 24 is formed as a protruding shaft, so as to facilitate the connection and cooperation with the groove or the orifice of the mounting seat 16. In the inserting connection mode, fixation can be achieved by a detachable fastener such as a fastening screw. However, those skilled in the art will appreciate that the above-mentioned detachable connection method is only an example, and in actual applications, technicians can adopt any suitable connection method according to actual needs, such as flange connection, snap connection, threaded connection, etc.

[0070] For further information, see Figure 1 and Figure 2 The transformer 100 according to the first embodiment of the present disclosure further includes a gas relay 50, which is connected to the oil pipeline 40 and allows the fluid (including gas and liquid) in the oil pipeline 40 to flow therethrough. Figure 1 As shown, the gas relay 50 divides the oil pipeline 40 into a first pipeline portion 40a and a second pipeline portion 40b, wherein the first pipeline portion 40a connects the oil storage cabinet 30 and the gas relay 50, and the second pipeline portion 40b connects the gas relay 50 and the oil tank 10. In this embodiment, the first pipeline portion 40a is formed as a flexible pipeline, and the second pipeline portion 40b is a rigid pipeline. The first pipeline portion 40a can be made of any suitable flexible material, such as a ready-made oil-gas composite hose, or a corrugated hose with a flexible structure. The connection between the two ends of the first pipeline portion 40a and the oil storage cabinet 30 and the gas relay 50 can be a flange connection, and a sealing ring is provided on the flange.

[0071] It is very advantageous to set the first pipeline part 40a to be flexible. In the prior art, since the entire oil pipeline is made of metal elbows, there is no room for adjustment in the size of this rigid structure, so it is inconvenient to install and the dimensional accuracy is extremely high. This results in the need to disconnect the oil pipeline when adjusting the height of the oil storage cabinet. Therefore, the transformer oil in the oil storage cabinet needs to be drained first. The utility model effectively solves the above problems by replacing the first pipeline part 40a from a rigid pipeline to a flexible pipeline.

[0072] First, the utility model sets the first pipe part 40a as a flexible pipe, so that the height of the oil storage cabinet 30 can be adjusted without draining the transformer oil in the oil storage cabinet 30, which reduces the on-site oil filling and static storage time, allowing the transformer to be put into operation quickly, thereby improving the transformer operation efficiency.

[0073] Secondly, in the process of adjusting the height of the oil storage cabinet 30, the oil pipeline 40 includes a flexible portion and therefore will not interfere with or restrict the height adjustment of the oil storage cabinet 30, thereby simplifying the operating steps of the height adjustment process and reducing the difficulty of operation.

[0074] Thirdly, compared with rigid pipes, the installation of flexible pipes does not require high installation accuracy, thereby reducing the installation accuracy requirements, and is not prone to installation stress during the installation process, reducing the possibility of loosening of the connections during transportation. As a result, the oil pipeline 40 according to the utility model greatly reduces oil leakage while maintaining fluid connectivity among the oil storage cabinet 30, the gas relay 50 and the oil tank 10.

[0075] The above is only a specific description of an embodiment of a transformer with a height-adjustable oil storage cabinet according to the utility model. However, it can be understood that the utility model can have a variety of alternative implementations. Figure 3 and Figure 4 , a transformer with a height-adjustable oil conservator according to a second embodiment of the present disclosure is described.

[0076] In the following, for the second embodiment, only the modified components are illustrated and described, and the same contents as the first embodiment will not be repeated.

[0077] like Figure 3 and Figure 4 As shown, in this embodiment, the adjustable bracket is a lifting bracket 20B, which includes: a support platform 25, which is fixed to the bottom of the oil storage cabinet 30 to provide a support surface for the oil storage cabinet; a base 26, which is fixed to the top cover 14 on the top of the oil tank 10; and a lifting component 27, through which the bracket 25 is connected to the base 26, and the lifting component 27 can adjust the height of the bracket 25 to support the oil storage cabinet 30 to move between a first height H1 and a second height H2.

[0078] As an example, Figure 3 and Figure 4The main structure of the lifting assembly 27 is schematically shown, and the lifting assembly 27 may include: a plurality of pillars 270, the lower ends of which are firmly fixed on the base 26; a plurality of sliding sleeves 272, which are fixed on the support 25 and respectively sleeved on one of the aforementioned plurality of pillars 270; and a driving mechanism 274, the driving mechanism is connected to the plurality of sliding sleeves 272 to drive the plurality of sliding sleeves to slide on the plurality of pillars 270 in the vertical direction, wherein the driving mechanism 274 may include a power input device and a transmission device, and the power input device may be any type of power device, such as a manual wheel or handle, or an electric motor. In this embodiment, the transmission device may adopt a toothed engagement method, such as a rack on the pillar 270 and a gear arranged in the sliding sleeve 272, and the driving force input by the power input device is converted into the relative movement of the sliding sleeve 272 on the pillar 270 through the power transmission of the gear and the rack.

[0079] Although only two pillars 270 are shown in the figure, the number of the pillars 270 can be optional according to actual needs. For example, the number of the pillars 270 can be three or four.

[0080] However, it is conceivable that the above-mentioned embodiment of the lifting assembly 27 is only an example. In actual application, the lifting assembly can be set according to actual needs. For example, instead of using the combination of the support 270 and the sliding sleeve 272, a plurality of telescopic rods can be set between the support platform 25 and the base 26. When the telescopic rods are in a compressed state, the oil storage cabinet 30 can be kept at a lower first height H1, and when the telescopic rods are in an extended state, the oil storage cabinet 30 can be raised to a second height H2; or for example, the support 270 can be replaced by a screw rod, and the sliding sleeve is provided with an internal thread, so that the movement of the sliding sleeve relative to the screw rod is achieved by means of threaded transmission. In addition, the transmission device can also be replaced by other conventional transmission components such as guide rails, chains, pulleys, pulleys, etc. instead of using gear transmission. Furthermore, the power input device can also be omitted, and the height of the support platform 25 and the oil storage cabinet 30 can be adjusted by a hoisting device or a lifting device such as a jack.

[0081] The lifting bracket 20B according to the second embodiment of the present invention further includes a locking mechanism, which is used to lock the lifting assembly 27 when the oil storage cabinet 30 is lowered to the first height or raised to the second height, thereby keeping the oil storage cabinet 30 at the first height or the second height. Figure 3 and Figure 4As shown, as an optional manner, the locking mechanism may adopt a fastening screw 28a, and accordingly, each sliding sleeve 272 includes a plurality of threaded holes 272a that match the fastening screw 28a. When the oil conservator 30 is lowered to the first height or raised to the second height, the oil conservator 30 may be fixed at the first height or the second height by passing the screw 28a through the threaded hole 272a and tightening it. Alternatively, in order to further enhance the firmness of the fixation, the support column 270 may also include a plurality of positioning holes 270a corresponding to the plurality of threaded holes 272a. The threaded holes 272a, the positioning holes 270a and the screw 28a may be arranged so that when the oil conservator 30 is lowered to the first height or raised to the second height, the screw 28a is passed through the threaded hole 272a and the positioning hole 270a and tightened, so that the oil conservator 30 may be fixed at the first height or the second height.

[0082] However, the locking mechanism according to the second embodiment of the present invention is not limited to the above structure, and those skilled in the art can select any suitable structure or device for locking as needed.

[0083] By using this lifting bracket 20B, when the transformer 100 needs to be transported, the oil conservator 30 can be lowered to a lower first height H1 by using the lifting assembly 27 and the oil conservator 30 can be fixed at the first height H1 by a locking mechanism (see Figure 4 ); After the transformer 100 is transported to the work site, the oil conservator 30 can be raised to the second height H2 required for normal operation and fixed at the second height H2 by a locking mechanism (see Figure 3 ).

[0084] Although not shown, in this embodiment, a flexible oil delivery pipe 40 is preferably also included.

[0085] It is conceivable that the lifting bracket 20B has all the advantages of the detachable bracket 20A of the first embodiment of the present invention. Furthermore, the lifting bracket 20B has better integrity and can be better adapted to any type of oil storage cabinet because it does not require the removal of parts.

[0086] Summary: The transformer disclosed in the present invention mainly includes the following parts: oil tank, bracket, oil storage cabinet, oil pipeline, and the main improvements are:

[0087] ① The bracket is an adjustable bracket, and the adjustable bracket is configured to fix the oil conservator at a first height or a second height required for normal operation relative to the oil tank.

[0088] ② The oil delivery pipeline is flexible so as to allow the oil storage cabinet to maintain fluid communication with the oil tank when adjusting between the first height and the second height.

[0089] The advantages of the transformer disclosed in the present invention are as follows:

[0090] ① By using an adjustable bracket, the height of the oil storage cabinet can be adjusted, so the transformer can be transported at a lower height, which effectively eliminates the obstacles to the transportation and transfer of the vehicle-mounted substation caused by transportation height restrictions or height restriction facilities on the road, and shortens the transportation time of the substation.

[0091] ② The adjustable bracket has a simple structure and low improvement cost, so the assembly height of the transformer can be reduced at a lower cost.

[0092] ③ The adjustable bracket has strong adaptability and can be widely used in any type of oil conservator, regardless of the shape and structure of the oil conservator. In the case of extremely harsh height restrictions and the need to significantly reduce the overall height, the adjustable bracket can be used together with the existing oval or flat oil conservator and the concave vehicle cargo platform, thereby minimizing the overall height of the transformer. Therefore, the improved solution of the utility model can reduce the assembly height in a manner that is generally applicable to existing designs.

[0093] ④ According to the utility model, the transformer lowers its overall height before transportation, which is beneficial to reducing the inertia force generated by the bumps, braking, acceleration or turning of the car during transportation, thereby reducing the adverse consequences such as the transformer tilting or tipping, structural loosening, and squeezing, deformation, and even tearing damage of weak parts (especially the bracket and oil storage cabinet and the pipes and parts connected thereto) caused by the inertia force, and effectively reducing the damage of parts during transportation.

[0094] ⑤ According to the utility model, the transformer lowers its overall height before transportation. Under the condition that the height limit remains unchanged, the upper limit of the capacity of the transformer allowed to be transported is increased. Therefore, the power of the vehicle-mounted substation can be increased to a certain extent, and the capacity and voltage upper limit of the mobile substation can be increased.

[0095] ⑥ The oil pipeline is flexible, so the height of the oil conservator can be adjusted without draining the transformer oil in the oil conservator, which reduces the on-site oil filling and static storage time, allowing the transformer to be put into operation quickly, thereby improving the transformer operation efficiency.

[0096] ⑦ In the process of adjusting the height of the oil storage cabinet, the adjustable bracket has a simple structure and is easy to operate. Because the oil pipeline includes a flexible part, the installation accuracy requirement is reduced, and it will not interfere with and restrict the height adjustment of the oil storage cabinet, thereby simplifying the operating steps of the height adjustment process and facilitating assembly and disassembly.

[0097] ⑧ According to the utility model, the transformer has enhanced transportation stability by lowering the overall height before transportation. At the same time, the flexible pipe is not easy to generate installation stress during installation, which reduces the possibility of loosening of the connection during transportation, thereby reducing oil leakage during transportation.

[0098] Various embodiments and variations of the present invention have been described in detail above, but those skilled in the art should understand that the present invention is not limited to the above-mentioned specific embodiments and variations but may include other possible combinations and combinations, and other variations and modifications may be implemented by those skilled in the art without departing from the essence and scope of the present invention. All these variations and modifications fall within the scope of the present invention. Moreover, all components described herein may be replaced by other technically equivalent components.

Claims

1. A transformer (100) with a height-adjustable oil conservator, comprising: An oil tank (10), comprising a tank body (12) and a top cover (14) located on the top of the tank body; A bracket, the bracket being mounted on a mounting seat (16) of the top cover (14); an oil storage cabinet (30), the oil storage cabinet being fixed on the bracket so as to be supported above the oil tank (10) via the bracket; and An oil pipeline (40), two ends of which are respectively connected to the top cover (14) and the oil storage cabinet (30); It is characterized in that The bracket is an adjustable bracket, and the adjustable bracket is configured to fix the oil storage cabinet (30) relative to the top cover (14) of the oil tank (10) at a first height (H1) or a second height (H2) higher than the first height (H1); and The oil delivery conduit (40) is flexible to allow the oil storage cabinet (30) to maintain fluid communication with the oil tank (10) when the oil storage cabinet (30) is adjusted between the first height (H1) and the second height (H2).

2. The transformer (100) with a height-adjustable oil conservator according to claim 1, characterized in that: The adjustable bracket is configured as a detachable bracket (20A), and the detachable bracket (20A) comprises: a fixed portion (22), the fixed portion (22) being arranged on the oil storage tank (30); and a detachable portion (24), wherein the detachable portion (24) is detachably connected to the fixed portion (22) and the mounting seat (16), When the detachable part (24) is in a detached state, the oil conservator (30) can be fixed at the first height (H1) by connecting the fixing part (22) to the mounting seat (16); and when the detachable part (24) is in an assembled state, the oil conservator (30) can be fixed at the second height (H2) by the adjustable bracket.

3. The transformer (100) with a height-adjustable oil conservator according to claim 2, characterized in that: The detachable part (24) and the fixed part (22) are plug-connected to each other and fixed via a detachable fastener.

4. The transformer (100) with a height-adjustable oil conservator according to claim 2, characterized in that: The detachable part (24) and the fixed part (22) are connected and fixed via a flange.

5. The transformer (100) with a height-adjustable oil conservator according to claim 1, characterized in that: The adjustable bracket is a lifting bracket (20B), and the lifting bracket (20B) comprises: A support platform (25), the support platform being fixed to the bottom of the oil storage tank; A base (26) fixed to the top of the oil tank; a lifting assembly (27), wherein the support platform is connected to the base through the lifting assembly to support the oil storage tank to move between the first height and the second height; and A locking mechanism is used to lock the lifting assembly to keep the oil storage cabinet at the first height or the second height.

6. The transformer (100) with a height-adjustable oil conservator according to claim 5, characterized in that: The lifting assembly comprises: a plurality of pillars (270), the lower ends of the plurality of pillars being fixed on the base; and A plurality of sliding sleeves (272) are fixed on the support platform and respectively sleeved on corresponding pillars among the plurality of pillars. The plurality of sliding sleeves are configured to slide on the plurality of pillars in a vertical direction and be locked in position by the locking mechanism.

7. The transformer (100) with a height-adjustable oil conservator according to claim 6, characterized in that: The lifting assembly further comprises a driving mechanism (274), the driving mechanism being connected to the plurality of sliding sleeves (272) so as to drive the plurality of sliding sleeves to slide on the plurality of pillars in a vertical direction. The driving mechanism (274) includes a power input device and a transmission device, and the power input device includes at least one of a manual wheel and an electric motor.

8. The transformer (100) with a height-adjustable oil conservator according to claim 6, characterized in that: The lifting assembly is driven by an external driving device, which includes a jack or a lifting device.

9. The transformer (100) with a height-adjustable oil conservator according to any one of claims 6 to 8, characterized in that: Each of the sliding sleeves (272) includes a plurality of threaded holes (272a); and The locking mechanism comprises screws (28a) cooperating with the plurality of threaded holes, The plurality of threaded holes (272a) and the screws (28a) are arranged such that when the oil storage cabinet (30) is lowered to the first height or raised to the second height, the oil storage cabinet can be fixed at the first height or the second height by passing the screws (28a) through the plurality of threaded holes (272a) and tightening them.

10. The transformer (100) with a height-adjustable oil conservator according to claim 9, characterized in that: Each of the pillars (270) further includes a plurality of positioning holes (270a) corresponding to the plurality of threaded holes (272a). The plurality of threaded holes (272a), the plurality of positioning holes (270a) and the screws (28a) are arranged so that when the oil storage cabinet is lowered to the first height or raised to the second height, the screws (28a) are passed through the threaded holes (272a) and the positioning holes (270a) and tightened, so that the oil storage cabinet can be fixed at the first height or the second height.

11. The transformer (100) with a height-adjustable oil conservator according to claim 1, characterized in that: It also includes a gas relay (50) connected to the oil pipeline (40), wherein the oil pipeline (40) includes: a first pipeline portion (40a), the first pipeline portion connecting the oil storage tank (30) and the gas relay (50), and a second pipe portion (40b), the second pipe portion connecting the gas relay (50) and the oil tank (10), Wherein, the first pipe portion (40a) is flexible.

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