Three-phase oil-immersed three-dimensional winding core distribution transformer

Abstract

The application relates to a three-phase oil-immersed three-dimensional winding core distribution transformer, and relates to the technical field of transformers, which comprises a transformer main body, three interval vertical sides of the transformer main body are fixed surfaces, the remaining three are mounting surfaces, heat dissipation fins are fixedly arranged on the three fixed surfaces; a supporting plate is fixedly arranged on the bottom surface of the transformer main body, three adjusting plates are rotationally connected to the edges of the three mounting surfaces; the adjusting plates can be downwardly rotated to a moving state of being attached to the bottom side of the supporting plate and upwardly rotated to a storage state of being parallel to the mounting surfaces; a moving wheel is fixedly arranged on the bottom surface of the adjusting plate in the moving state, the moving wheel faces the mounting surface when the adjusting plate is in the storage state, and a locking piece for fixing the two states of the adjusting plate is arranged outside the transformer main body; the safety hidden dangers such as oil tank sealing failure or heat dissipation fin deformation caused by collision during manual carrying are avoided, and the equipment service life is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformers, in particular to a three-phase oil-immersed three-dimensional wound core distribution transformer. BACKGROUND

[0002] The three-phase oil-immersed three-dimensional wound core distribution transformer is the core equipment of the power distribution system, and is mainly used for voltage conversion and power distribution. Its technical origin can be traced back to the demand for breaking through the performance bottleneck of the traditional laminated transformer: the traditional core has air gap due to the lap joint of silicon steel sheets, resulting in high no-load loss, asymmetric magnetic circuit, large operating noise and other problems. The three-dimensional wound core is formed by continuously winding the silicon steel strip into three single frames with the same geometric size, and splicing into a triangular three-dimensional structure, so that the lengths of the three-phase magnetic circuits are completely equal and have no joints, the magnetic resistance is uniformly distributed, the no-load loss (reduced by 30%-50% compared with the traditional transformer) and the operating noise (≤50dB) are significantly reduced, and the short-circuit resistance and mechanical stability are improved. The oil-immersed design further enhances the heat dissipation and insulation performance, making it the preferred solution for high-efficiency and high-reliability power distribution scenarios.

[0003] The current small three-dimensional wound core transformer (usually with a capacity of 10-315kVA) has formed a standardized technical solution. Its main structure includes: a triangular three-dimensional wound core, high and low voltage windings, impregnated insulating oil and a fully sealed oil tank; external integrated heat dissipation fins (distributed on three vertical sides to enhance convective heat dissipation), high / low voltage porcelain bottles (fixed on the top for lead connection) and a support base (fixed to the mounting surface by screws at the bottom). The design takes into account compactness and reliability, with a weight controlled between 200-400kg, which can be directly installed on outdoor power poles, suitable for urban streets, rural power grids and new energy access scenarios. When transporting, the vehicle is hoisted as a whole, and after unloading, it is directly lifted to the installation position of the power pole by a crane, with an efficient process.

[0004] When the transformer placed under the original power pole needs to be adjusted to the position under the nearby power pole, due to the self-weight of 200-400kg, it needs to be manually carried by 4-6 workers, which is time-consuming and has safety hazards; if the carrying distance exceeds 50 meters, the labor cost and time cost will increase sharply. In addition, during the carrying process, the oil tank seal may be damaged or the heat dissipation fins may be deformed due to collision, affecting the service life of the equipment, and there is room for improvement. SUMMARY

[0005] The purpose of the present application is to provide a three-phase oil-immersed three-dimensional wound core distribution transformer to solve the problem of low efficiency of the above-mentioned transformer when moving a short distance.

[0006] The three-phase oil-immersed three-dimensional wound core distribution transformer provided by the present application adopts the following technical solution:

[0007] The utility model provides a kind of three-phase oil-immersed three-dimensional volume core distribution transformer, including transformer main body, three interval vertical sides of the transformer main body are fixed surface, remaining three are mounting surface, three fixed surface are fixedly provided with cooling fin;Supporting plate is fixed on the bottom surface of the transformer main body, three adjusting plates are rotatably connected on the edge of the supporting plate close to three mounting surfaces;The adjusting plate can be rotated downward to the mobile state that the bottom side of supporting plate is attached, and is rotated upward to the storage state that mounting surface is parallel;The bottom surface of the adjusting plate when mobile state is fixedly provided with mobile wheel, the mobile wheel is towards mounting surface when adjusting plate is in storage state, and the outside of the transformer main body is equipped with the locking member that the two states of adjusting plate are fixed.

[0008] By adopting the above technical scheme, when the transformer needs to be moved for a short distance, the adjusting plate is adjusted to the mobile state, at this time the mobile wheel is towards the ground, and is fixed by cooperating with the locking member, so that the staff can directly push the transformer main body, without manual carrying by multiple people, which greatly reduces the labor cost and time cost, and avoids the safety hazards such as oil tank sealing failure or cooling fin deformation caused by collision during manual carrying, thereby ensuring the service life of the equipment.

[0009] Optionally, the locking member includes a locking bolt located on one side of the mounting surface and a locking seat fixedly provided on the mounting surface, a receiving groove for accommodating the mobile wheel is formed in the side surface of the locking seat away from the mounting surface, a locking through hole is formed in the adjusting plate, and a locking screw hole that can coincide with the locking through hole when the adjusting plate is in the storage state is formed in the locking seat, and the locking bolt can be screwed into the locking screw hole after penetrating through the locking through hole.

[0010] By adopting the above technical scheme, when the transformer is installed and applied, the adjusting plate is rotated upward to the storage state, at this time the mobile wheel is placed into the receiving groove of the locking seat, so that the structure is compact and regular, the locking screw hole on the locking seat coincides with the locking through hole on the adjusting plate, the locking bolt penetrates through the locking through hole and is screwed into the locking screw hole, the adjusting plate is firmly locked in the storage state, and loosening of the adjusting plate due to vibration and other factors during operation of the transformer is prevented, thereby ensuring the stability and safety of the transformer installation.

[0011] Optionally, elastic positioning members are arranged on the two opposite inner walls of the receiving groove, and positioning grooves for clamping the elastic positioning members are formed in the two opposite side surfaces of the mobile wheel.

[0012] By adopting the above technical scheme, when the moving wheel is placed into the receiving groove by rotating the adjusting plate, the elastic positioning member on the inner wall of the receiving groove will be clamped into the positioning groove on the side of the moving wheel, forming a pre-locking effect. This design can effectively prevent the moving wheel from accidentally falling out of the receiving groove before the locking bolt fixes the adjusting plate, avoiding the influence of the stability of the overall structure due to the shaking of the moving wheel during the installation or operation of the transformer. At the same time, when it is necessary to turn out the moving wheel, only a certain external force is needed to overcome the clamping force of the elastic positioning member, and the moving wheel can be smoothly turned out, which is relatively convenient to operate.

[0013] Optionally, the elastic positioning member comprises positioning blocks located in the receiving groove, elastic members arranged on the inner wall of the receiving groove, positioning rods fixedly connected to one side of the positioning blocks, and positioning insertion holes provided on the inner wall of the receiving groove and through which the positioning rods slide; the elastic members are used to extrude the two positioning blocks to slide in the direction of approaching each other; the side surface of the positioning block away from the positioning rod is an arc surface; and the inner wall of the positioning groove is an arc surface, and the arc length of the two arc surfaces is a minor arc.

[0014] By adopting the above technical scheme, the elastic members promote the two positioning blocks to approach each other, and when the moving wheel is placed into the receiving groove, the positioning blocks can be more smoothly clamped into the positioning groove by virtue of the arc surface design, realizing automatic pre-positioning and reducing the operation difficulty. The positioning rods slide in the positioning insertion holes to provide guidance for the movement of the positioning blocks, ensuring accurate positioning and preventing the positioning blocks from deviating to affect the locking effect. The two arc surfaces are both minor arcs, which can ensure that the positioning blocks and the positioning groove are tightly clamped, and when the moving wheel needs to be turned out, only a certain external force is needed to make the arc surface of the positioning block smoothly come out of the positioning groove, without the phenomenon of being stuck, which takes into account the locking firmness and the operation convenience.

[0015] Optionally, a fixed rod is slidably arranged on the outside of the transformer body in the vertical direction, the fixed rod can reciprocally slide along the axis direction of itself, a fixed through hole is arranged on the supporting plate, a fixed recess is arranged on the upper side of the adjusting plate when the adjusting plate is in the moving state, and the fixed recess is coincident with the fixed through hole, and the fixed rod can be inserted into the fixed recess after penetrating through the fixed through hole after being lowered.

[0016] By adopting the above technical scheme, when the transformer needs to be moved for a short distance, the adjusting plate is adjusted to the moving state, at this time, the fixed through hole is coincident with the fixed recess, the fixed rod is lowered to penetrate through the fixed through hole and is inserted into the fixed recess, forming a fixed structure, which can effectively prevent the adjusting plate from shaking or shifting due to bumping or external force during movement, avoid the instability of the moving wheel, and ensure the safety and stability of the movement of the transformer. Moreover, the fixed rod slides in the vertical direction and can be reciprocally operated, and when the state of the adjusting plate is switched, only the fixed rod needs to be simply raised or lowered to realize locking or unlocking, which is convenient and efficient to operate.

[0017] Optionally, a limiting protrusion is fixed on the end of the positioning rod away from the positioning block, a limiting groove is formed on the upper side of the limiting protrusion, and a limiting rod bent downward is fixed on the outer periphery of the fixing rod.

[0018] By adopting the above technical scheme, when the moving wheel is separated from the storage groove or the fixing rod is separated from the limiting through hole, the limiting protrusion is automatically inserted into the positioning groove under the action of the elastic member, which not only avoids accidental collision damage caused by the exposure of the limiting protrusion, but also makes the overall structure more compact and regular. At the same time, the limiting rod on the fixing rod cooperates with the limiting groove, and when the adjusting plate is in the storage or moving state, the limiting protrusion can form additional constraint on the positioning block to prevent it from being accidentally displaced due to vibration or external force, thereby ensuring the reliability of the elastic positioning member. When operation is needed, the limiting rod can be separated from the limiting groove by moving the fixing rod upward, so that the locking of the positioning block is released, and the operation is simple and intuitive.

[0019] Optionally, an extension rod is vertically installed on the upper end of the fixing rod, a fixing protrusion vertically downward is fixed on the end of the extension rod away from the fixing rod, a fixing gap is formed on the bottom side of the fixing protrusion, and the upper edge of the adjusting plate in the storage state can be clamped into the fixing gap after sliding adjustment of the fixing rod.

[0020] By adopting the above technical scheme, when the adjusting plate is in the storage state, the fixing rod is slidably adjusted, the upper edge of the adjusting plate is clamped into the fixing gap, and the fixing protrusion at the end of the extension rod cooperates with the related structure to form multi-directional constraint and fixation. This not only enhances the stability of the adjusting plate in the storage state, prevents it from loosening due to vibration during the operation of the transformer, and ensures the safe operation of the transformer, but also further improves the compactness and reliability of the overall structure.

[0021] Optionally, the number of fixing rods on the same installation surface is two, and the outside of the transformer body is provided with a first connecting rod and a second connecting rod. The two ends of the first connecting rod are fixedly connected to the mutually close sides of the upper ends of the two fixing rods, and the two ends of the second connecting rod are fixedly connected to the ends of the two extension rods away from the fixing rods.

[0022] By adopting the technical scheme, two fixing rods are arranged on the same installation surface, and the upper ends of the two fixing rods are connected by the first connecting rod, and the ends of the two extension rods are connected by the second connecting rod, forming a stable frame type linkage structure. When adjusting the fixing rods, the two fixing rods can slide synchronously, ensuring that the forces on both sides of the adjusting plate are uniform, avoiding the inclination of the adjusting plate or the positioning deviation of the moving wheels due to unilateral fixation instability, and effectively ensuring the stability of the transformer in the moving state. At the same time, this linkage design simplifies the operation process, and the worker only needs to operate one place to realize the synchronous adjustment of the fixing rods on both sides of the same installation surface, greatly improving the installation and moving efficiency.

[0023] Optionally, the inside of the fixing rod is provided with a gas supply channel, and the outer periphery is provided with a gas injection port in communication with the gas supply channel; a connecting head for detachable connection of an external pipeline for conveying compressed gas is fixed on the outer periphery of the end of the fixing rod close to the extension rod; the inside of the first connecting rod is provided with a connecting channel in communication with the two gas supply channels; after the two fixing rods are pulled out of the limiting through holes, they can be inserted between adjacent heat dissipation fins under the holding of the user, and the connecting head is connected with the external pipeline at this time to make the compressed gas sprayed from the gas injection port to clean the heat dissipation fins.

[0024] By adopting the technical scheme, when the transformer needs to be cleaned, the two fixing rods are pulled out of the limiting through holes and inserted between adjacent heat dissipation fins, and the external compressed gas pipeline is connected through the connecting head, and the compressed gas is sprayed from the gas injection port through the gas supply channel, which can effectively remove dust, sundries and the like in the gaps and on the surface of the heat dissipation fins, avoid the decrease of heat dissipation efficiency due to dust accumulation on the heat dissipation fins, and ensure the normal operating temperature of the transformer. This design ingeniously utilizes the structural characteristics of the fixing rod, without the need for additional special cleaning tools, saving equipment cost and maintenance space. At the same time, the operation process is simple and convenient, and the worker can quickly complete the cleaning work, improving the maintenance efficiency.

[0025] Optionally, the extension rod is rotatably connected with the fixing rod, the fixing rod is provided with a fastener outside for locking the rotating state of the extension rod, and the extension rod can be rotated to a coaxial state with the fixing rod and a perpendicular state; after the two fixing rods are pulled out of the limiting through holes, the extension rod and the fixing rod can be adjusted to the coaxial state, and the extension rod, the first connecting rod and the second connecting rod together form a handle for the user to hold and clean the heat dissipation fins.

[0026] By adopting the technical scheme, when cleaning the heat dissipation fins, the two fixing rods are pulled out, and the extension rod is rotated to the coaxial state with the fixing rod, and at this time the extension rod, the first connecting rod and the second connecting rod together form a handle, which is convenient for the user to hold and operate, makes the cleaning process more labor-saving and stable, can effectively clean the gaps between the heat dissipation fins, and ensures the cleaning effect. In the non-cleaning state, the extension rod is rotated to the perpendicular state and locked, which can reduce the space occupation and avoid interference with other parts of the transformer.

[0027] To sum up, the present application includes the following beneficial technical effects:

[0028] When the transformer needs to be moved for a short distance, the adjusting plate is adjusted to the moving state, at this time the moving wheels are towards the ground, cooperate with the locking piece to fix, the staff can directly push the transformer main body, without manual handling by multiple people, greatly reducing the labor cost and time cost, and avoiding the safety hazards caused by collision during manual handling, such as oil tank sealing failure or heat dissipation fin deformation, etc., ensuring the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0031] Figure 2 is a schematic diagram of the structure of the embodiment of the present application embodying the installation and cooperation of the moving assembly;

[0032] Figure 3 is a schematic diagram of the partial cross-sectional structure of the embodiment of the present application embodying the adjusting plate in the vertical upward state;

[0033] Figure 4 is a schematic diagram of the partial cross-sectional structure of the embodiment of the present application embodying the installation and cooperation of the adjusting plate and the fixing rod;

[0034] Figure 5 is a schematic diagram of the partial cross-sectional structure of the embodiment of the present application embodying the installation and cooperation of the elastic clamping piece;

[0035] Figure 6 is Figure 5 is a schematic diagram of the enlarged A part in the embodiment of the present application;

[0036] Figure 7 is Figure 5 is a schematic diagram of the enlarged B part in the embodiment of the present application;

[0037] Figure 8 is a schematic diagram of the partial cross-sectional structure of the embodiment of the present application embodying the installation and cooperation of the extension rod;

[0038] Figure 9 is a schematic diagram of the structure of the embodiment of the present application embodying the installation and cooperation of the extension rod and the fixing rod;

[0039] Figure 10 is a schematic diagram of the cross-sectional structure of the embodiment of the present application embodying the installation and cooperation of the connecting head;

[0040] Figure 11 is a structural schematic view of the fixed rod when cleaning the heat dissipation fins.

[0041] In the figure, 1, transformer main body; 11, fixed surface; 12, mounting surface; 13, guide block; 2, heat dissipation fin; 3, moving assembly; 31, support plate; 311, fixed through hole; 32, adjusting plate; 321, fixed groove; 33, moving wheel; 331, positioning groove; 4, locking piece; 41, locking seat; 411, storage slot; 412, positioning jack; 413, positioning groove; 42, locking bolt; 43, elastic positioning piece; 431, positioning block; 432, positioning rod; 434, elastic piece; 4341, spring; 435, limiting protrusion; 4351, limiting groove; 5, fixed assembly; 51, fixed rod; 511, air supply channel; 512, air outlet; 513, connecting head; 52, limiting rod; 53, extension rod; 54, fixed protrusion; 541, fixed gap; 55, first connecting rod; 56, second connecting rod; 57, fastener. DETAILED DESCRIPTION

[0042] The application will be described in further detail below with reference to the drawings.

[0043] Embodiment:

[0044] With reference to Figure 1 A three-phase oil-immersed three-dimensional roll core distribution transformer, comprising a transformer main body 1, wherein three vertically spaced side surfaces of the transformer main body 1 are fixed surfaces 11, and the remaining three are mounting surfaces 12, and a plurality of heat dissipation fins 2 are welded on each of the three fixed surfaces 11 in a vertical direction and in parallel.

[0045] In the application of the transformer, the heat generated by the transformer main body 1 is conducted to the heat dissipation fins 2, and the gaps between adjacent two heat dissipation fins 2 are the same, so that the heat on the heat dissipation fins 2 can be quickly dissipated to the air through the heat dissipation fins 2, thereby improving the heat dissipation performance of the transformer.

[0046] With reference to Figure 2 and Figure 3 A moving assembly 3 is arranged below the transformer main body 1, wherein the moving assembly 3 comprises a support plate 31 fixed to the bottom surface of the transformer main body 1 by screws, and three adjusting plates 32 are rotatably connected to the edges of the support plate 31 close to the three mounting surfaces 12; the adjusting plates 32 can be rotated downward to a moving state in which the bottom surface of the adjusting plates 32 is attached to the bottom side of the support plate 31, and upward to a storage state in which the adjusting plates 32 are parallel to the mounting surfaces 12; a locking piece 4 is arranged outside the transformer main body 1 to fix the two rotating states of the adjusting plates 32, and a moving wheel 33 is fixed to the bottom surface of the adjusting plates 32 in the moving state;

[0047] When the transformer needs to be moved for a short distance, the adjusting plate 32 is adjusted to the moving state and fixed by the locking piece 4, at this time, the moving wheel 33 is in the direction towards the ground, and the staff can directly push the transformer main body 1 to drive the transformer to move for a short distance; when the transformer is installed and applied, the adjusting plate 32 is turned upwards to the storage state and fixed by the locking piece 4, which is convenient for the installation of the transformer.

[0048] With reference to Figure 3 , the locking piece 4 comprises a locking bolt 42 located on one side of the mounting surface 12 and a locking seat 41 fixed on the mounting surface 12, wherein the locking seat 41 is provided with a storage slot 411 for the moving wheel 33 on the side away from the mounting surface 12; the adjusting plate 32 is provided with a locking through hole, and the locking seat 41 is provided with a locking screw hole;

[0049] When the adjusting plate 32 is in the storage state, the locking screw hole coincides with the locking through hole, at this time, the locking bolt 42 can be inserted into the locking screw hole after penetrating through the locking through hole, so as to fix the adjusting plate 32 in the storage state.

[0050] With reference to Figure 4 , the outside of the transformer main body 1 is provided with a fixing assembly 5, wherein the fixing assembly 5 comprises two fixing rods 51 which are arranged side by side on the mounting surface 12 in the vertical direction, and the transformer main body 1 is provided with a guide block 13 on the mounting surface 12, wherein the guide block 13 is provided with a guide hole for the fixing rod 51 to penetrate and slide up and down;

[0051] The supporting plate 31 is provided with a fixing through hole 311, and the upper side of the adjusting plate 32 in the moving state is provided with a fixing recess 321 which coincides with the fixing through hole 311; when it is needed to lock the adjusting plate 32 in the moving state, the fixing rod 51 is moved downwards to penetrate the fixing through hole 311 and then inserted into the fixing recess 321.

[0052] With reference to Figure 5 and Figure 6 , the opposite two inner walls of the storage slot 411 are provided with elastic positioning pieces 43, and the opposite two side surfaces of the moving wheel 33 are provided with positioning grooves 331 for the elastic positioning pieces 43 to be clamped into; when the moving wheel 33 is placed into the inside of the storage slot 411 with the rotation of the adjusting plate 32, the elastic clamping pieces are clamped into the positioning grooves 331 to pre-lock the moving wheel 33;

[0053] The elastic positioning piece 43 comprises a positioning block 431 located in the storage slot 411, an elastic piece 434 arranged on the inner wall of the storage slot 411, and a positioning rod 432 fixedly connected to one side of the positioning block 431, wherein the inner wall of the storage slot 411 is provided with a positioning insertion hole 412 for the positioning rod 432 to penetrate and slide, the side surface of the positioning block 431 away from the positioning rod 432 is an arc surface, the inner wall of the positioning groove 331 is an arc surface, and the arc length of the arc surfaces corresponding to each other is a minor arc;

[0054] The elastic member 434 is a spring 4341 in a compressed state, two ends of the spring 4341 are fixedly connected with the side faces of the positioning blocks 431 towards the positioning rod 432 and the inner wall of the accommodation groove 411 respectively, the elastic member 434 is used for extruding the two positioning blocks 431 to slide in the direction of approaching each other, so that the positioning blocks 431 keep the elastic force of being clamped into the positioning grooves 331;

[0055] When it is needed to turn out the mobile wheel 33, the user needs to first release the locking of the adjusting plate 32 by the locking bolt 42, because the outer side face of the positioning block 431 is an arc face, so that a certain force can make the positioning block 431 out of the positioning groove 331, and finally the mobile wheel 33 is turned out of the accommodation groove 411.

[0056] With reference to Figure 5 and Figure 7 , the two fixed rods 51 are respectively located at the opposite vertical sides of the locking seat 41, and the positioning recess 413 is arranged on the opening inner edge of the positioning block 431 away from the positioning block 431; the limiting protrusion 435 is fixedly arranged on the end of the positioning rod 432 away from the positioning block 431, the upper side face of the limiting protrusion 435 is provided with the limiting recess 4351, and the outer periphery of the fixed rod 51 is fixedly provided with the limiting rod 52 which is bent downward;

[0057] When the adjusting plate 32 is in the accommodation state, the limiting rod 52 can be inserted into the limiting recess 4351 after the height is adjusted, so as to fix the state of the positioning block 431, and improve the installation stability of the state of the adjusting plate 32 and the mobile wheel 33;

[0058] When the mobile wheel 33 is out of the accommodation groove 411 and the fixed rod 51 is out of the limiting through hole, the limiting protrusion 435 can be inserted into the inside of the positioning recess 413 under the action of the elastic member 434, at this time, the outer side face of the limiting protrusion 435 is flush with the outer side face of the locking seat 41, so as to facilitate the accommodation of the limiting protrusion 435.

[0059] With reference to Figure 8 , the upper end of the fixed rod 51 is vertically provided with the extension rod 53, the end of the extension rod 53 away from the fixed rod 51 is fixedly provided with the vertical downward fixed protrusion 54, and the bottom side face of the fixed protrusion 54 is provided with the fixed gap 541; when the adjusting plate 32 is in the accommodation state, the upper edge of the adjusting plate 32 can be clamped into the fixed gap 541 after the sliding adjustment of the fixed rod 51, so as to further lock the state of the adjusting plate 32 by the sliding adjustment of the fixed rod 51, and the positioning rod 432 is also inserted into the inside of the positioning recess 413 to lock the positioning block 431.

[0060] With reference to Figure 8 and Figure 9The number of the fixed rods 51 on the same installation surface 12 is two, and the outside of the transformer body 1 is provided with a first connecting rod 55 and a second connecting rod 56; the two ends of the first connecting rod 55 are fixedly connected with the sides of the upper ends of the two fixed rods 51 which are close to each other, and the two ends of the second connecting rod 56 are fixedly connected with the ends of the two extension rods 53 which are away from the fixed rods 51; so as to ensure the synchronous up-down movement of the two fixed rods 51 on the same side.

[0061] With reference to Figure 10 and Figure 11 The inside of the fixed rod 51 is provided with a gas supply channel 511, and the outer periphery is provided with a gas jet 512 which is in communication with the gas supply channel 511, and the inside of the first connecting rod 55 is provided with a connecting channel which is in communication with the two gas supply channels 511; the outer periphery of the end of the fixed rod 51 close to the extension rod 53 is fixedly provided with a connecting head 513 which is detachably connected with an external pipeline for conveying compressed gas.

[0062] When it is necessary to clean the heat dissipation fins 2, the two fixed rods 51 are first detached from the limiting holes, and then the external pipeline is connected to the connecting head 513, which can be inserted between the adjacent heat dissipation fins 2 under the holding of the user, so that the heat dissipation fins 2 are cleaned after the compressed gas is sprayed from the gas jet 512.

[0063] With reference to Figure 9 and Figure 10 The extension rod 53 is rotationally connected with the fixed rod 51, and the outside of the fixed rod 51 is provided with a fastener 57 for locking the rotation state of the extension rod 53, which is a fastening bolt, the extension rod 53 is provided with a fastening hole, and the fixed rod 51 is provided with a plurality of fastening screw holes which can coincide with the fastening hole, the fastening bolt is penetrated through the fastening hole and screwed into the corresponding fastening screw hole, so as to adjust and lock the rotation state of the extension rod 53, which is a conventional fixing structure and will not be described here; the extension rod 53 can be rotated to the coaxial and perpendicular state with the fixed rod 51 and be fixed by the fastener 57.

[0064] After the two fixed rods 51 are detached from the limiting holes, the extension rod 53 and the fixed rod 51 can be adjusted to the coaxial state, and the extension rod 53, the first connecting rod 55 and the second connecting rod 56 at this time jointly form a handle which is convenient for the user to hold to clean the heat dissipation fins 2.

[0065] The implementation principle of the embodiment of the application is:

[0066] When installing, the adjusting plate 32 is turned upward to a storage state parallel to the mounting surface 12, the moving wheel 33 is placed into the storage groove 411 of the locking seat 41, the elastic positioning member 43 (the positioning block 431 is clamped into the positioning groove 331 on the moving wheel 33 under the action of the spring 4341) is pre-locked, and then the locking bolt 42 is used to fix the adjusting plate 32; finally, the fixed rod 51 is adjusted to slide, so that the upper edge of the adjusting plate 32 is clamped into the fixed notch 541, and the positioning rod 432 is also inserted into the positioning recess 413 to lock the positioning block 431;

[0067] When moving a short distance, the locking bolt 42 is first unlocked from the adjusting plate 32, then the fixed rod 51 is moved upward to unlock the adjusting plate 32 and the positioning block 431, and then the adjusting plate 32 is turned downward to a moving state in which the bottom side of the adjusting plate 32 is attached to the supporting plate 31; at this time, the moving wheel 33 faces the ground, and finally the fixed rod 51 is moved downward to pass through the fixed through hole 311 and is inserted into the fixed recess 321; at this time, the state of the adjusting plate 32 is locked, and the staff can push the transformer main body 1 to move.

[0068] When it is necessary to clean the heat dissipation fins 2, the two fixed rods 51 are first detached from the limiting through holes, the extension rod 53 is then adjusted to be coaxial with the fixed rod 51, the extension rod 53 and the first and second connecting rods 56 form a handle, and then an external pipeline is connected to the connecting head 513; the user holds the handle, inserts the fixed rod 51 between adjacent heat dissipation fins 2, and sprays compressed gas to clean the heat dissipation fins 2 and remove dust and other impurities, thereby maintaining good heat dissipation effect.

[0069] Unless otherwise defined, the terms or scientific terms used in the present application shall have the usual meaning understood by a person with ordinary skill in the art to which the present application belongs. The terms "first", "second", "third" and the like used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. The terms "one" or "a" and the like do not represent a quantity limitation, but represent the existence of at least one. The terms "including", "containing" and the like mean that the elements or objects appearing before "including" or "containing" cover the elements or objects listed after "including" or "containing" and their equivalents, and do not exclude other elements or objects. The terms "upper", "lower", "left", "right" and the like only represent relative positional relationships, which may change accordingly when the absolute positions of the described objects change.

[0070] The embodiments of the present specific embodiment are the preferred embodiments of the present application, and do not limit the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A three-phase oil-immersed stereoscopic roll core distribution transformer, comprising a transformer main body (1), three spaced vertical sides of the transformer main body (1) are fixed sides (11) and the remaining three are mounting sides (12), and heat dissipation fins (2) are fixedly arranged on each of the three fixed sides (11); characterized in that, The bottom surface of the transformer body (1) is fixed with a support plate (31), and three adjusting plates (32) are rotatably connected to the edge of the support plate (31) close to the three mounting surfaces (12); The adjusting plate (32) can be rotated downward to a moving state in which the bottom surface of the adjusting plate (32) is attached to the bottom side of the support plate (31), and upward to a storage state in which the adjusting plate (32) is parallel to the mounting surface (12); the bottom surface of the adjusting plate (32) in the moving state is fixed with a moving wheel (33), and the moving wheel (33) faces the mounting surface (12) when the adjusting plate (32) is in the storage state; the outside of the transformer body (1) is provided with a locking member (4) for fixing the storage state of the adjusting plate (32); The locking member (4) comprises a locking bolt (42) located on one side of the mounting surface (12) and a locking seat (41) fixed on the mounting surface (12); the side of the locking seat (41) away from the mounting surface (12) is provided with a storage slot (411) for accommodating the moving wheel (33); the adjusting plate (32) is provided with a locking through hole, and the locking seat (41) is provided with a locking screw hole which can coincide with the locking through hole when the adjusting plate (32) is in the storage state; the locking bolt (42) can be screwed into the locking screw hole after penetrating through the locking through hole; The opposite inner walls of the storage slot (411) are provided with elastic positioning members (43), and the opposite side surfaces of the moving wheel (33) are provided with positioning grooves (331) for clamping the elastic positioning members (43); the elastic positioning member (43) comprises a positioning block (431) located in the storage slot (411), an elastic member (434) arranged on the inner wall of the storage slot (411), and a positioning rod (432) fixedly connected to one side of the positioning block (431); the inner wall of the storage slot (411) is provided with a positioning insertion hole (412) for penetrating and sliding the positioning rod (432); the elastic member (434) is used for pressing the two positioning blocks (431) to slide in the direction of approaching each other; the side surface of the positioning block (431) away from the positioning rod (432) is an arc surface, and the inner wall of the positioning groove (331) is an arc surface, and the arc lengths of the two arc surfaces are both inferior arcs; The outside of the transformer body (1) is slidably provided with a fixing rod (51) in the vertical direction, and the fixing rod (51) can reciprocally slide along the axis direction thereof; the support plate (31) is provided with a fixing through hole (311), and the upper side surface of the adjusting plate (32) in the moving state is provided with a fixing recess (321) coinciding with the fixing through hole (311); the fixing rod (51) can be inserted into the fixing recess (321) after penetrating through the fixing through hole (311) when moving downward.

2. A three-phase oil immersed distribution transformer with a three-dimensional volume wound core according to claim 1, characterized in that, The end of the positioning rod (432) away from the positioning block (431) is fixedly provided with a limiting protrusion (435), and the upper side surface of the limiting protrusion (435) is provided with a limiting recess (4351); the outer periphery of the fixing rod (51) is fixedly provided with a limiting rod (52) bent downward; The positioning sink (413) is arranged in the opening of the positioning block (431) away from the positioning hole (412), and the limiting protrusion (435) can be inserted into the positioning sink (413) under the action of the elastic member (434) when the moving wheel (33) is separated from the receiving groove (411) and when the fixed rod (51) is separated from the limiting through hole.

3. A three-phase oil immersed distribution transformer with a three-dimensional volume wound core according to claim 1, characterized in that, The upper end of the fixed rod (51) is vertically provided with an extension rod (53), and a vertical downward fixed protrusion (54) is fixedly arranged at the end of the extension rod (53) away from the fixed rod (51). A fixed gap (541) is arranged on the bottom side of the fixed protrusion (54). When the adjusting plate (32) is in the receiving state, the upper edge can be clamped into the fixed gap (541) after sliding adjustment of the fixed rod (51).

4. A three-phase oil immersed distribution transformer with a three-dimensional volume wound core according to claim 3, characterized in that, The number of fixed rods (51) on the same installation surface (12) is two, and the outside of the transformer main body (1) is provided with a first connecting rod (55) and a second connecting rod (56). The two ends of the first connecting rod (55) are fixedly connected with the sides of the upper ends of the two fixed rods (51) close to each other, and the two ends of the second connecting rod (56) are fixedly connected with the ends of the two extension rods (53) away from the fixed rod (51).

5. A three-phase oil immersed distribution transformer with a three-dimensional volume wound core according to claim 4, characterized in that, The inside of the fixed rod (51) is provided with a gas supply channel (511), and the outer periphery is provided with a gas injection port (512) in communication with the gas supply channel (511). The inside of the first connecting rod (55) is provided with a connecting channel connecting the two gas supply channels (511). The outer periphery of the end of the fixed rod (51) close to the extension rod (53) is fixedly provided with a connecting head (513) for detachable connection of an external pipeline for conveying compressed gas. After the two fixed rods (51) are separated from the limiting through hole, they can be inserted between adjacent heat dissipation fins (2) under the holding of the user. At this time, the connecting head (513) is connected with the external pipeline, so that the compressed gas is sprayed from the gas injection port (512) to clean the heat dissipation fins (2).

6. A three-phase oil immersed distribution transformer with a three-dimensional volume wound core according to claim 5, characterized in that, The extension rod (53) is rotationally connected with the fixed rod (51), and the fixed rod (51) is provided with a fastener (57) for locking the rotation state of the extension rod (53). The extension rod (53) can be rotated to a coaxial and perpendicular state with the fixed rod (51). After the two fixed rods (51) are separated from the limiting through hole, the extension rod (53) and the fixed rod (51) can be adjusted to a coaxial state. At this time, the extension rod (53), the first connecting rod (55) and the second connecting rod (56) together form a handle for the user to hold and clean the heat dissipation fins (2).

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