Dry-type transformer

Abstract

The utility model relates to a dry-type transformer which comprises an iron core winding body and a fixing seat, two ends of the iron core winding body are provided with protruding blocks, a locking mechanism is arranged between the protruding blocks and the fixing seat to achieve detachable connection of the protruding blocks and the fixing seat, and the locking mechanism comprises a locking sleeve and a butt joint column which can be in butt joint with each other. A linkage rod extending along the axis of the linkage rod is arranged in the locking sleeve connected to the fixing base, a lock head is arranged in the butt joint column connected to the protruding block, and when the linkage rod moves in the first direction X close to the protruding block, the lock head enables the bottom of the lock head to abut against the first end of the linkage rod so as to achieve locking of the linkage rod and the butt joint column. According to the utility model, by introducing the locking mechanism and the linkage mechanism, the rapid and stable assembly between the iron core winding body and the fixed seat can be realized, the assembly efficiency is improved, and the working intensity of maintenance personnel is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field especially relates to a dry -type transformer. BACKGROUND

[0002] With the completion of the project of the technical transformation of the yellow Ji liquor engineering and the intelligent packaging project, a new way is provided for the transformation and innovative development of the liquor industry in the new era. Compared with the traditional liquor making process, new intelligent liquor making equipment such as two-dimensional mixing machines, distillation machine robots and grain bran conveying systems has been widely used in the whole production process. In order to ensure the safe and reliable operation of these equipment, the continuity and stability of power supply must be ensured.

[0003] Dry-type transformer is a key component of power supply in the liquor production process. In the long-term operation, the transformer may be shut down due to electrical insulation aging, winding inter-turn short circuit and other fault factors, thus causing the liquor production to be stagnant. Therefore, it is very important to quickly handle the transformer fault and restore the power supply of the liquor making equipment to ensure the continuity of the liquor production.

[0004] At present, the company's liquor production area mainly covers three parks of non-heritage, Luohan and Huangji. With the continuous expansion of mechanical and automatic production scale, the power consumption of the equipment increases accordingly. The number of dry-type transformers already put into operation exceeds 200, which has the characteristics of large quantity, wide distribution and dispersion. Therefore, when the dry-type transformer fails, whether it can be quickly handled and the power supply is restored in time puts forward very high requirements and challenges to the maintenance personnel of the company's power equipment. The main structure of the dry-type transformer includes the core, winding and related accessories. A transformer usually has multiple integral structures composed of the core and winding. When the winding inter-turn short circuit and other faults occur inside the transformer, the transformer structure needs to be disassembled for maintenance, and after the maintenance is completed, the structure and the external combined fixing member are reassembled. The current assembly method usually uses screws to connect the integral structure composed of the core and winding with the fixing member. However, since there are many screws, the maintenance personnel needs to spend a lot of time in assembly. In addition, the assembly space is limited, which makes it inconvenient to tighten the screws, affecting the work efficiency. At the same time, in order to ensure the firmness of the connection, it is usually required to lock the screws, which consumes a lot of physical strength of the maintenance personnel.

[0005] CN209747291U discloses a mounting structure of a dry-type transformer. The scheme introduces a moving plate located below the transformer body, and uses a screw rod and a bevel gear system to drive the rotating shaft to rotate by rotating the handle, so as to realize the positioning adjustment in the vertical direction of the mounting plate, and finally fix the transformer body by applying pressure to the mounting plate. This design simplifies the complex operation process of traditional fixation relying on multiple bolts.

[0006] To ensure uniform distribution of fixing force across the entire mounting plate surface, the movable plate is designed to match the mounting plate at the bottom of the transformer body. However, this design has limitations when applied to large dry-type transformers. Specifically, when the transformer body is large, the required operating space for the movable plate may be limited, resulting in insufficient travel. Simultaneously, as the movable plate increases in size, greater inertia and friction must be overcome when using a crank to drive the shaft rotation, making operation more strenuous. This not only increases the difficulty of installation and disassembly for maintenance personnel but may also affect work efficiency and operational safety.

[0007] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this utility model, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that this utility model does not have the features of these prior art. On the contrary, this utility model has all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Utility Model Content

[0008] To address the problem that current dry-type transformers are inconvenient to assemble, this application proposes a dry-type transformer.

[0009] This application relates to a dry-type transformer, which includes a core winding body and a fixed base. The core winding body has protrusions at both ends. A locking mechanism is provided between the protrusions and the fixed base to achieve a detachable connection between the two. The locking mechanism includes a locking sleeve and a docking post that can dock with each other. A linkage rod extending along its axis is provided in the locking sleeve connected to the fixed base. A lock head is provided in the docking post connected to the protrusion. When the linkage rod moves in a first direction X near the protrusion, the lock head locks the two by abutting its bottom against the first end of the linkage rod.

[0010] This invention, through the design of a locking mechanism, allows the core winding body to be easily installed onto or removed from the mounting base without the need for complex tools or procedures, greatly improving the efficiency of installation and maintenance. The coordinated design of the linkage rod and the lock head simplifies the operation process. Locking or unlocking is achieved by moving the linkage rod along the first direction X, effectively preventing accidental unlocking due to external factors and reducing the skill requirements for maintenance personnel. Furthermore, by placing the bottom of the lock head against the first end of the linkage rod, a stable mechanical connection is formed, ensuring that it will not loosen due to vibration or other external forces during operation, while also maintaining the compactness of the structure, saving space, and facilitating the overall layout and miniaturization design of dry-type transformers.

[0011] According to a preferred embodiment, the first end of the linkage rod is provided with a limiting plate and a clamping plate opposite to each other, and a spring is arranged between the clamping plate and the limiting plate, so that the clamping plate can slide away from or close to the limiting plate within the pre-set sliding groove of the first end of the linkage rod under the elastic force of the spring. By taking the limiting plate as a fixed reference, the linear precision of the clamping plate movement is ensured, and the elastic force of the spring provides a continuous clamping force, avoiding loosening due to external vibration or load changes. This design allows the clamping plate to automatically move away from or close to the limiting plate when subjected to external force (i.e. when locking or unlocking with the lock head), thereby adapting to the connection requirements of different sizes or positions.

[0012] According to a preferred embodiment, the locking mechanism includes a bearing seat arranged at the end of the locking sleeve away from the butt column, and the bearing seat is provided with a circular hole to allow the linkage rod to slide and be partially located within the internal cavity of the locking sleeve. By arranging the bearing seat at the end of the locking sleeve away from the butt column and allowing the linkage rod to partially pass through the internal cavity of the locking sleeve, a compact design of the structure is achieved. This layout not only saves space, but also ensures effective connection between components, improving the space utilization efficiency of the overall structure. By providing a through circular hole on the bearing seat, an accurate guide channel is provided for the linkage rod. This design ensures that the linkage rod always remains on the predetermined track during movement, effectively reducing deviation and shaking, and improving the operation precision and stability of the entire mechanism. In addition, the circular hole not only serves as a guide, but also effectively limits the linkage rod. This limiting function prevents excessive displacement of the linkage rod during operation, thereby protecting other components inside the mechanism and enhancing the safety of the overall structure.

[0013] According to a preferred embodiment, the locking mechanism includes a sliding rod extending along the axis of the butt column, the sliding rod is fixed at the top of the butt column, and the lock head is fixed at the end of the sliding rod away from the butt column. The sliding rod extends along the axis of the butt column and is fixed at the top of the butt column, so that the entire locking mechanism has good stability in the axial direction. This coaxial design effectively reduces lateral deviation, improving the stability and reliability of the locking mechanism during use. The fixed connection of the sliding rod and the butt column simplifies the overall structure of the locking mechanism. By fixing the sliding rod at the top of the butt column and arranging the lock head at the end of the sliding rod away from the butt column, additional connecting components are reduced, reducing manufacturing costs and assembly complexity. In addition, the design of the lock head fixed on the sliding rod ensures that the lock head maintains an accurate axial movement path during operation. This design makes the locking and unlocking process of the lock head more precise, reducing the risk of locking failure due to misalignment.

[0014] According to a preferred embodiment, the bottom of the lock head is configured with an unlocking slider slidingly sleeved on the surface of the sliding rod, and the lock head is configured as a hollow hemispherical structure to enable the unlocking slider to partially move into the interior of the lock head. The lock head adopts a hollow hemispherical structure design, allowing the unlocking slider to partially move into the interior of the lock head. This structure design significantly reduces the overall volume of the locking mechanism, optimizes the space utilization efficiency, and makes the entire device more compact. The hemispherical lock head structure not only looks beautiful but also improves the overall structural strength. This curved design can more evenly disperse external pressure, enhancing the compression resistance and durability of the lock head.

[0015] According to a preferred embodiment, the dry-type transformer includes a linkage mechanism connected to the linkage rod through a lifting steel cable, and the linkage mechanism includes a support frame fixed to the support seat and a winding roller located on one side of the support frame, wherein the top of the support frame is configured with a guide wheel that changes the layout direction of the lifting steel cable, and the end of the lifting steel cable away from the linkage rod is wound around the winding roller.

[0016] According to a preferred embodiment, the linkage mechanism includes a connecting plate fixed to one side of the support frame and a linkage plate rotatably connected to one end of the connecting plate, wherein the winding roller configured at one end of the connecting plate can rotate synchronously with the linkage plate. The guide wheel at the top of the support frame is used to change the layout direction of the lifting steel cable, which optimizes the force transmission path, enabling the applied force during operation to act more directly and efficiently on the linkage rod, reducing unnecessary friction and energy loss. In addition, the support frame is fixed to the support seat, providing a stable support foundation for the entire linkage mechanism. This structure design effectively improves the stability and reliability of the linkage mechanism during operation.

[0017] According to a preferred embodiment, the linkage mechanism includes a ratchet and a clamping plate, the ratchet is coaxially fixed on both sides of the winding roller, and the clamping plate is slidingly clamped on the linkage plate, with one end of the clamping plate abutting the edge of the ratchet. The ratchet is coaxially fixed on both sides of the winding roller, and cooperates with the clamping plate to form a reliable one-way locking mechanism. The design of the ratchet allows the winding roller to rotate freely in one direction and be automatically locked in the opposite direction, preventing accidental unwinding or loosening, thereby improving the safety and stability of the operation.

[0018] According to a preferred embodiment, a first return spring is provided on the side of the clamping plate away from the ratchet, and the end of the first return spring away from the clamping plate abuts the linkage plate. The design of the first return spring allows the clamping plate to automatically return to the initial position after the external force is removed. This function ensures that the clamping plate and the ratchet always maintain good contact, improving the reliability and stability of the linkage mechanism. In addition, through the automatic resetting action of the spring, maintenance personnel do not need to manually adjust the position of the clamping plate, which simplifies the operation steps and improves the operation efficiency of the equipment.

[0019] According to a preferred embodiment, the linkage rod is provided with a second reset spring outside the rod body of the locking sleeve, the second reset spring is in abutment between the bearing seat and the transverse plate fixed to the second end of the linkage rod. The second reset spring is arranged to enable the linkage rod to automatically return to the initial position after being subjected to external force. This function ensures that the linkage system can quickly return to the preparation state after the operation is completed, thereby improving the response speed and operation convenience of the entire system. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a preferred overall structure schematic diagram of a dry-type transformer provided by the present application;

[0021] Figure 2 is a preferred linkage mechanism provided by the present application Figure 1 is an enlarged view of the fixed seat and the lug connection at position A in the preferred linkage mechanism provided by the present application;

[0022] Figure 3 is a structure schematic diagram of the butt joint column and the locking sleeve of the locking mechanism when they are not connected provided by the present application;

[0023] Figure 4 is a schematic diagram of the locking mechanism connected with the linkage mechanism after the locking sleeve is removed provided by the present application;

[0024] Figure 5 is a partial structure schematic diagram of the linkage mechanism provided by the present application;

[0025] Figure 6 is a structure schematic diagram of the hollow interior of the butt joint column provided by the present application;

[0026] Figure 7 is a schematic diagram of the clamping plate and the connecting structure thereof provided by the present application;

[0027] Figure 8 is a structure schematic diagram of the clamping plate and the lock head when they are separated, the clamping plate and the lock head in the locked state and the clamping plate and the lock head in the unlocked state provided by the present application. Among them, Figure 8 a is a structure schematic diagram of the clamping plate and the lock head when they are separated provided by the present application; Figure 8 b is a structure schematic diagram of the clamping plate and the lock head in the locked state provided by the present application; Figure 8 c is a structure schematic diagram of the clamping plate and the lock head in the unlocked state provided by the present application.

[0028] LIST OF REFERENCE NUMERALS

[0029] 100: Iron core winding body; 200: Fixed seat; 300: Protrusion; 400: Locking mechanism; 410: Connecting post; 420: Locking sleeve; 430: Support seat; 440: Linkage rod; 441: Second return spring; 450: Limiting plate; 460: Clamping plate; 470: Sliding rod; 480: Lock head; 490: Unlocking slider; 500: Linkage mechanism; 510: Support frame; 520: Guide wheel; 530: Connecting plate; 540: Linkage plate; 550: Take-up roller; 560: Lifting steel cable; 570: Ratchet; 580: Clamping plate; 590: First return spring. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings.

[0031] Location definition: combined with Figure 3 The first direction X is downward along the axis of the mating post 410, and the second direction Y is upward along the axis of the mating post 410. For example... Figure 4 As shown, the end of the linkage rod 440 furthest from the linkage mechanism 500 is the first end, and the end closest to the linkage mechanism 500 is the second end.

[0032] This utility model relates to a dry-type transformer, such as Figure 1 As shown, it includes a core winding body 100 and a mounting base 200. The core winding body 100 is the main component constituting the electromagnetic induction part of the transformer. It can be made of multiple layers of silicon steel sheets, with conductive coils wound on it to achieve voltage transformation. Both ends of the core winding body 100 are equipped with protrusions 300. These protrusions 300 are designed as metal structures with a certain thickness and strength, and their shape can be rectangular or cylindrical, to provide sufficient contact area and mechanical stability. This design ensures that the core winding body 100 is not adversely affected or damaged during installation to or removal from the mounting base 200, thereby protecting the integrity of the transformer's internal structure and operational reliability.

[0033] Preferably, a locking mechanism 400 is provided between the core winding body 100 and the fixing seat 200 to achieve a detachable connection. For example... Figures 2-4As shown, the locking mechanism 400 includes a locking sleeve 420 and a docking column 410, which can be mutually docked to form a firm connection. The locking sleeve 420 is connected to the fixed seat 200, and its internal structure is a hollow cylinder extending along the axis direction and embedding a linkage rod 440; while the docking column 410 is connected to the protrusion 300 of the core winding body 100, and its interior is provided with a lock head 480. The design of the lock head 480 takes into account that its bottom needs to cooperate with the first end of the linkage rod 440, so it has a certain inclined surface, so as to facilitate the abutment of the bottom to the first end of the linkage rod 440 when the linkage rod 440 moves in the first direction X close to the protrusion 300, thereby realizing the close locking of the two. In addition, in order to ensure the smoothness and reliability of the locking process, the surfaces of the linkage rod 440 and the lock head 480 are precisely processed to reduce friction resistance and increase wear resistance.

[0034] Preferably, as shown in Figure 4 , Figure 7 , the first end of the linkage rod 440 is equipped with mutually opposite limiting plates 450 and clamping plates 460, which ensure the cooperation accuracy through precise machining. Among them, the two limiting plates 450 are symmetrically arranged and fixedly installed at the end of the linkage rod 440, and the structure is designed as a metal plate with sufficient thickness to withstand external pressure, and the surface is hardened to improve wear resistance. The clamping plate 460 is slidingly connected in the sliding groove arranged in the side surface of the two limiting plates 450 close to each other, and the sliding groove is provided with a compression spring to ensure that the clamping plate 460 can move linearly along the sliding groove under the action of the spring force. The movement direction is perpendicular to the axis direction of the linkage rod 440, so as to realize the sliding away or close to the limiting plate 450. The inside of the sliding groove is smooth and provided with guide ribs to reduce friction and guide the movement path of the clamping plate 460. In addition, the edge of the clamping plate 460 in contact with the sliding groove is rounded to avoid wear or jamming caused by sharp edges.

[0035] As shown in Figure 8 a, during the locking process, when the lock head 480 in the docking column 410 approaches the linkage rod 440, the top of the lock head 480 will first contact the clamping plate 460. With the continuous advancement, the clamping plate 460 moves close to the limiting plate 450 under pressure, and the compression spring stores energy. As shown in Figure 8 b, once the lock head 480 passes the clamping plate 460, the spring releases energy and pushes the clamping plate 460 back to position, thereby tightly holding the lock head 480 and completing the locking action. This mechanism not only simplifies the operation steps, but also enhances the safety and reliability of the connection. The overall structure composed of the limiting plate 450 and the clamping plate 460 is at least symmetrically arranged with two groups at one end of the linkage rod 440. In this embodiment, by arranging multiple clamping plates 460, the firmness of the connection between the docking column 410 and the locking sleeve 420 can be improved.

[0036] Preferably, as shown in Figure 3 The locking mechanism 400 includes a support seat 430 arranged at the end of the locking sleeve 420 away from the docking column 410. The support seat 430 is designed as a metal block with a bottom area larger than the axial cross-sectional area of the locking sleeve 420, so that the support seat 430 and the locking sleeve 420 form a reliable and stable whole structure by means of fixed connection such as threading or welding. The support seat 430 is provided with a circular hole that matches the shape of the linkage rod 440, allowing the linkage rod 440 to slide inside it. Precise machining ensures that the gap between the two is minimized, achieving precise limiting and guiding functions. The inner wall of the circular hole is hardened to improve wear resistance and is provided with a lubricating coating to reduce frictional resistance, ensuring smooth sliding of the linkage rod 440. The linkage rod 440 can slide in the circular hole and partially protrude from the internal cavity of the locking sleeve 420 to connect with other mechanisms.

[0037] Preferably, as shown in Figure 3 , Figure 6 The locking mechanism 400 includes a sliding rod 470 extending along the axis of the docking column 410, which is fixedly installed at the top of the docking column 410. The sliding rod 470 is designed as a high-strength metal rod with sufficient rigidity and stability to ensure that it does not bend or deform during cooperation with the linkage rod 440. The connection between the sliding rod 470 and the docking column 410 uses threading or welding technology to ensure firm combination between the two while ensuring electrical insulation performance. At the end of the sliding rod 470 away from the docking column 410 is a lock head 480, which is fixed to the end of the sliding rod 470 by fasteners or welding to achieve reliable mechanical cooperation with the clamping plate 460 on the linkage rod 440. The surface of the lock head 480 is hardened to improve wear resistance and corrosion resistance, thereby prolonging the service life.

[0038] Preferably, as shown in Figure 6 The bottom of the lock head 480 is configured with an unlocking slider 490 that slides on the surface of the sliding rod 470. The unlocking slider 490 can freely slide on the sliding rod 470. The lock head 480 is designed as a hollow hemispherical structure, and the internal space allows the unlocking slider 490 to partially move into the lock head 480, thereby achieving the unlocking function. This design ensures precise mechanical cooperation between the lock head 480 and the linkage rod 440, while providing sufficient operating space to facilitate the completion of the unlocking action. Specifically, as shown in Figure 8As shown in diagram c, when unlocking is required, the linkage rod 440 first moves along the first direction X, causing the clamping plate 460 to abut against the bottom edge of the unlocking slider 490. At this time, by quickly pulling the linkage rod 440 in the second direction Y, the clamping plate 460 can quickly slide out from the edge of the unlocking slider 490 and separate from the lock head 480, thus completing the unlocking process. More preferably, an elastic seal, such as a rubber gasket, is provided between the contact surfaces of the unlocking slider 490 and the lock head 480. This seal not only provides dust and water protection but also effectively reduces the impact force when the unlocking slider 490 moves into the lock head 480, protecting the internal components from damage.

[0039] Preferably, such as Figure 5 As shown, the dry-type transformer of this utility model includes a linkage mechanism 500 connected to a linkage rod 440 via a lifting steel cable 560. The linkage mechanism 500 mainly includes a support frame 510 fixed to a support base 430 and a take-up roller 550 located on one side of the support frame 510, used to move the linkage rod 440 to complete locking or unlocking operations. Specifically, the support frame 510 is designed as a robust metal frame structure with sufficient mechanical strength to support the weight of the entire linkage mechanism 500 and ensure stability during long-term use. A guide wheel 520 is configured on the top of the support frame 510 to change the laying direction of the lifting steel cable 560. A bearing is installed at the axis of the guide wheel 520 to ensure smooth rotation and reduce the torque required during operation.

[0040] Preferably, such as Figure 5 As shown, one end of the lifting cable 560 is securely connected to the linkage rod 440, and the other end passes over the guide wheel 520 at the top of the support frame 510 and is wound onto the take-up roller 550. The take-up roller 550 is mounted on a rotatable shaft to facilitate control of the cable's winding and unwinding. The lifting cable 560 is made of multiple strands of stainless steel wire twisted together. One end is securely connected to the linkage rod 440 via a special clamp, and the other end passes over the guide wheel 520 and is tightly wound onto the take-up roller 550 in a spiral winding manner. To prevent the cable from loosening or knotting during winding, the surface of the take-up roller 550 can be provided with spiral grooves or dividers to ensure the orderly arrangement of the cable. Preferably, at the connection point between the lifting cable 560 and the linkage rod 440, and at the position where the cable passes through the support frame 510, wear-resistant sleeves or conduits are used to protect the cable from external environmental influences and reduce damage caused by friction.

[0041] Preferably, such as Figures 3-5As shown, the linkage mechanism 500 includes a connecting plate 530 fixed on one side of the support frame 510 and a linkage plate 540 hinged to one end of the connecting plate 530 through a rotating shaft. The connecting plate 530 is stamped from high-strength alloy steel plate, and reinforcing ribs are provided at the connection with the support frame 510 to improve structural stability. Anti-rust coating or corrosion-resistant treatment is used between the contact surfaces to ensure long-term reliability. The linkage plate 540 is preferably configured in an L-shaped structure, with the long side fixed to the side of the support frame 510 by welding or threaded connection, and the short side end connected coaxially with the winding roller 550 through a bearing, ensuring that the winding roller 550 can rotate synchronously with the linkage plate 540. To reduce friction and ensure smooth rotation, the bearing is selected with high load capacity and low friction characteristics, and regular lubrication maintenance is performed. In addition, a sealing ring is provided outside the bearing to prevent dust and moisture from entering and protect the internal components from contamination.

[0042] Preferably, as Figures 3-5 As shown, the core components of the linkage mechanism 500 include a ratchet 570 and a clamping plate 580. The ratchet 570 can be made of alloy steel such as quenching treatment, coaxially fixed on both sides of the winding roller 550, and the tooth shape is optimized to achieve smooth engagement. The clamping plate 580 is configured as a nearly rectangular steel plate, with guide grooves on the sides that can be carded with the pre-set guide rails on the linkage plate 540, ensuring accurate movement path. One end of the clamping plate 580 is machined into a bevel matching the tooth shape of the ratchet 570, ensuring reliable clamping of the two. To enhance wear resistance and impact resistance, the clamping plate 580 surface can be hardened or plated. The side of the clamping plate 580 away from the ratchet 570 is provided with a first return spring 590 made of fatigue-resistant spring steel, with both ends respectively pressed to the spring seat on the clamping plate 580 and the linkage plate 540, ensuring stable contact between the clamping plate 580 and the ratchet 570 through pre-tightening force. The spring seat takes into account the convenience of installation and replacement, with a structure that is easy to disassemble, facilitating maintenance. The first return spring 590 provides a pre-tightening force to the clamping plate 580 along the direction of the pre-set guide rails on the linkage plate 540, ensuring that the clamping plate 580 can effectively lock the ratchet 570 without additional external force.

[0043] Preferably, the main body part of the linkage rod 440 is sleeved with the locking sleeve 420, and a second return spring 441 is installed on the rod body of the locking sleeve 420. The spring can adopt a variable pitch design to adapt to different stroke requirements, and the two ends of the spring are respectively pressed to the spring seat on the supporting seat 430 and the horizontal plate of the second end part of the linkage rod 440. The horizontal plate is a rectangular steel plate, which is connected with the linkage rod 440 by welding, and the quality and strength of the weld are ensured. The pre-tightening force of the second return spring 441 is accurately calculated to ensure that the linkage rod 440 can quickly move to the second direction Y to achieve reset when released, especially when unlocked, while avoiding generating excessive impact force. Further preferably, a self-lubricating bushing is also provided at the matching surface of the locking sleeve 420 and the linkage rod 440 to reduce the frictional resistance and improve the sensitivity of the action.

[0044] It should be noted that the above specific embodiments are exemplary, and those skilled in the art can come up with various solutions under the inspiration of the disclosure of the present application, and these solutions also belong to the disclosed range of the present application and fall within the protection scope of the present application. Those skilled in the art should understand that the specification and drawings of the present application are illustrative and do not constitute a limitation on the claims. The protection scope of the present application is defined by the claims and their equivalents. In the full text, the features introduced by "preferably" are only optional ways, and should not be understood as necessarily provided, therefore the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A dry-type transformer comprising a core winding body (100) and a fixing base (200), both ends of the core winding body (100) are provided with protrusions (300), a locking mechanism (400) is arranged between the protrusions (300) and the fixing base (200) to realize detachable connection of the two, characterized in that the locking mechanism (400) comprises a locking sleeve (420) and a butt joint column (410) capable of being mutually docked, a linkage rod (440) extending along its axis is arranged in the locking sleeve (420) connected to the fixing base (200), a lock head (480) is arranged in the butt joint column (410) connected to the protrusion (300), wherein when the linkage rod (440) moves in a first direction X close to the protrusion (300), the lock head (480) is locked by abutting its bottom to a first end of the linkage rod (440). The first end of the linkage rod (440) is provided with a limiting plate (450) and a clamping plate (460) opposite to each other, wherein a spring is arranged between the clamping plate (460) and the limiting plate (450), so that the clamping plate (460) can slide away from or close to the limiting plate (450) in a predetermined sliding groove of the first end of the linkage rod (440) under the elastic force of the spring. The locking mechanism (400) comprises a supporting seat (430) arranged at one end of the locking sleeve (420) away from the butt joint column (410), the supporting seat (430) is provided with a circular hole, so that the linkage rod (440) can be slidingly fitted and limited in the circular hole and partially penetrates the internal cavity of the locking sleeve (420).

2. Dry-type transformer according to claim 1, characterized in that The locking mechanism (400) comprises a sliding rod (470) extending along the axis of the butt joint column (410), the sliding rod (470) is fixed at the top of the butt joint column (410), and the lock head (480) is fixed at one end of the sliding rod (470) away from the butt joint column (410).

3. Dry-type transformer according to claim 1, characterized in that The bottom of the lock head (480) is provided with an unlocking slider (490) slidingly sleeved on the surface of the sliding rod (470), and the lock head (480) is configured as a hollow hemispherical structure, so that the unlocking slider (490) can partially move into the inside of the lock head (480).

4. Dry-type transformer according to claim 1, characterized in that A linkage mechanism (500) connected to the linkage rod (440) through a pulling steel cable (560) is included, the linkage mechanism (500) comprises a support frame (510) fixed on the supporting seat (430) and a winding roller (550) located on one side of the support frame (510), wherein the top of the support frame (510) is provided with a guide wheel (520) changing the laying direction of the pulling steel cable (560), and one end of the pulling steel cable (560) away from the linkage rod (440) passes through the guide wheel (520) to be wound on the winding roller (550).

5. Dry-type transformer according to claim 4, characterized in that ​ 6. Dry-type transformer according to claim 3, characterized in that ​ ​ 7. Dry-type transformer according to claim 6, characterized in that The linkage mechanism (500) comprises a connecting plate (530) fixed on one side of the support frame (510) and a linkage plate (540) rotationally connected to one end of the connecting plate (530), wherein the winding roller (550) arranged at one end of the connecting plate (530) can rotate synchronously with the linkage plate (540).

8. Dry-type transformer according to claim 7, characterized in that The linkage mechanism (500) comprises a ratchet wheel (570) coaxially fixed on both sides of the winding roller (550) and a clamping plate (580) slidingly clamped on the linkage plate (540), and one end of the clamping plate (580) abuts at the edge of the ratchet wheel (570).

9. Dry-type transformer according to claim 8, characterized in that The clamping plate (580) is provided with a first reset spring (590) on the side away from the ratchet wheel (570), and one end of the first reset spring (590) away from the clamping plate (580) abuts against the linkage plate (540).

10. Dry-type transformer according to claim 3, characterized in that The linkage rod (440) is provided with a second reset spring (441) on the rod body outside the locking sleeve (420), and the second reset spring (441) abuts between the supporting seat (430) and the transverse plate fixed to the second end of the linkage rod (440).

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