Multi-zone temperature ramped gradient transformer curing oven

Abstract

The utility model relates to transformer processing technical field, and disclose a multi -section variable temperature inverted gradient transformer curing oven, including furnace body, the closed door of hinged at the furnace body opening, the heating area of symmetrical both sides in the furnace body inside, install the support plate in the furnace body inside, set up the baffle for isolating heat in support plate top and the bracket of adjustable orientation in the furnace body inside, the bracket is by a plurality of arc rods, the whole bowl shape and top of the bracket contract, for preventing workpiece to fall, the bottom of the bracket is fixedly provided with L shape connecting rod, the bottom of L shape connecting rod is equipped with the first electric push -rod for adjusting the bracket height, the utility model drives the automatic transfer workpiece of bracket through motor and electric push -rod, avoids the heat loss and the potential safety hazard of hoisting, promotes the stability of placing, realizes the district heat insulation with baffle and plugging board, effectively suppresses the heat to the furnace door to escape, reduces the scald risk and reduces energy waste.

Description

Technical Field

[0001] This utility model relates to the field of transformer processing, and in particular to a multi-stage variable temperature reverse gradient transformer curing oven. Background Technology

[0002] A multi-stage variable temperature gradient transformer curing oven is an advanced heat treatment device that precisely controls multiple temperature zones within the oven to create a special temperature field that decreases from high to low from the inlet to the outlet. This allows for high-quality and uniform curing of workpieces such as transformer coils from the surface inwards. During use, the workpiece (such as a resin-impregnated transformer coil) enters from the high-temperature zone, where the surface resin first rapidly gels, forming a shell that locks in the shape and prevents resin leakage. As the workpiece moves towards the low-temperature zone, its internal heat is transferred outwards, allowing the internal resin to cure slowly and thoroughly, thus avoiding defects such as air bubbles, voids, or incomplete curing.

[0003] Although traditional curing ovens employ a multi-segment independent temperature zone design to create an inverted gradient temperature field, the heat distribution inside the oven is uneven, and heat easily escapes towards the oven door, resulting in higher heat at the oven door. Furthermore, since most equipment uses fixed trays or support frames, the workpieces need to be repeatedly adjusted in position using external hoisting equipment when entering and exiting the oven. This is not only cumbersome and inefficient, but also prone to shaking or shifting due to unstable positioning in high-temperature environments, further exacerbating uneven heating. At the same time, there are also safety hazards when the high-temperature oven door is opened.

[0004] Therefore, a multi-stage variable temperature inverted gradient transformer curing oven was designed. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a multi-segment variable temperature reverse gradient transformer curing oven. This solves the problem of uneven temperature within the existing transformer curing oven, which leads to inconsistent coil curing, easily causing bubbles, stress, and local defects, seriously affecting the product's insulation performance, pass rate, and long-term operational reliability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A multi-stage variable temperature inverted gradient transformer curing oven includes a furnace body, a closed door hinged to the opening of the furnace body, heating zones located on both symmetrical sides inside the furnace body, a support plate installed inside the furnace body, a partition plate set on top of the support plate for heat insulation, and an adjustable bracket located inside the furnace body.

[0007] Preferably, the bracket is composed of multiple arc-shaped rods, and the bracket as a whole is bowl-shaped with a tapered top to prevent the workpiece from falling.

[0008] Preferably, an L-shaped connecting rod is fixedly provided at the bottom of the bracket, and a first electric push rod for adjusting the height of the bracket is installed at the bottom of the L-shaped connecting rod.

[0009] Preferably, the first electric actuator passes through the support plate and a motor is fixedly installed at its bottom, and the motor is fixedly connected to the bottom of the support plate.

[0010] Preferably, the motor is used to control the arc-shaped rod to rotate to both sides of the partition to facilitate the loading and unloading of workpieces on the bracket.

[0011] Preferably, the surface of the partition is provided with a feeding groove, and the bottom of the support plate is provided with a movable groove that communicates with the feeding groove.

[0012] Preferably, the moving trough is slidably provided with a sealing plate for closing the feed trough.

[0013] Preferably, two symmetrical second electric actuators are fixedly provided at the bottom of the sealing plate, and the second electric actuators are used to control the opening and closing state between the sealing plate and the feed trough.

[0014] Preferably, when the device is working, the motor controls the bracket to rotate to the side of the partition away from the closed door, and the second electric push rod controls the sealing plate to close the feed chute; when the device stops working, the second electric push rod controls the sealing plate to move down, and the motor controls the bracket to rotate from the feed chute to the side closer to the closed door for cooling.

[0015] Preferably, the temperature of the heating zone gradually decreases from low to high, and the partition divides the interior of the furnace into two areas: the side away from the closed door is used for heating and curing, and the side closer to the closed door is used for cooling. This also reduces heat transfer to the closed door and avoids safety hazards caused by excessively high temperature of the closed door when it is opened.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a liftable and rotating bracket linked to a motor and a first electric actuator to achieve automatic transfer of workpieces between high and low temperatures and cooling stations. This effectively avoids heat loss, temperature fluctuations, and safety hazards associated with manual operation caused by hoisting in traditional curing ovens. The bowl-shaped collapsible bracket also enhances workpiece placement stability. Through the combined use of partitions, a feeding chute, and a sealing plate, reasonable heat insulation is achieved. This not only physically separates the high-temperature curing and low-temperature cooling zones within the oven, but also creates an inverted temperature gradient in the heating zone. This further reduces the tendency for heat to spread towards the oven door and dissipate heat, as is common in traditional equipment. This lowers the risk of burns during door opening and also reduces energy waste. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the structural relationship between the bracket and the sealing plate of this utility model; Figure 3 This is a schematic diagram showing the structural relationship between the support plate and the partition plate of this utility model; Figure 4 This is a cross-sectional structural diagram of the present invention; Figure 5 This is a schematic diagram showing the detailed structure of the bracket of this utility model.

[0019] Drawing number explanation: 1. Furnace body; 11. Heating zone; 12. Support plate; 121. Moving groove; 13. Partition plate; 131. Feeding groove; 2. Sealing door; 3. Bracket; 31. Arc rod; 32. L-shaped connecting rod; 33. First electric push rod; 34. Motor; 4. Sealing plate; 41. Second electric push rod. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0022] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0023] It is understood that the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0024] Please see Figure 1-5 A multi-stage variable temperature gradient transformer curing oven includes a furnace body 1, a closed door 2 hinged to the opening of the furnace body 1, heating zones 11 located on both sides of the furnace body 1, a support plate 12 installed inside the furnace body 1, a partition plate 13 set on the top of the support plate 12 for heat insulation, and an adjustable bracket 3 located inside the furnace body 1. The bracket 3 is composed of multiple arc-shaped rods 31. The bracket 3 is bowl-shaped and the top is tapered to prevent the workpiece from falling. An L-shaped connecting rod 32 is fixedly installed at the bottom of the bracket 3. A first electric push rod 33 for adjusting the height of the bracket 3 is installed at the bottom of the L-shaped connecting rod 32. The first electric push rod 33 passes through the support plate 12 and a motor 34 is fixedly installed at the bottom. The motor 34 is fixedly connected to the bottom of the support plate 12. The motor 34 is used to control the arc-shaped rods 31 to rotate to both sides of the partition plate 13 to facilitate the loading and unloading of workpieces on the bracket 3. The surface of the partition plate 13 is provided with a feeding groove 131, and the bottom of the support plate 12 is provided with a moving groove 121 that communicates with the feeding groove 131. A sealing plate 4 for closing the feeding groove 131 is slidably arranged inside the moving groove 121. Two symmetrical second electric push rods 41 are fixedly arranged at the bottom of the sealing plate 4. The second electric push rods 41 are used to control the opening and closing state between the sealing plate 4 and the feeding groove 131. When the device is working, the motor 34 controls the bracket 3 to rotate to the side of the partition 13 away from the closed door 2, and the second electric push rod 41 controls the sealing plate 4 to close the feed trough 131. When the device stops working, the second electric push rod 41 controls the sealing plate 4 to move down, and the motor 34 controls the bracket 3 to rotate from the feed trough 131 to the side closer to the closed door 2 for cooling. The temperature of the heating zone 11 gradually decreases from low to high. The partition 13 divides the interior of the furnace body 1 into two areas. The side away from the closed door 2 is used for heating and curing, and the side closer to the closed door 2 is used for cooling. At the same time, it reduces the heat transfer to the closed door 2 and avoids the closed door 2 from being too hot when it is opened, which may cause safety hazards.

[0025] When using the device, the height of the bowl-shaped collecting bracket 3, which loads the workpiece, is adjusted by the L-shaped connecting rod 32 and the first electric push rod 33, and driven by the motor 34. It can flexibly move through the feeding trough 131 into the high-temperature curing zone away from the furnace door or the low-temperature cooling zone near the furnace door via the partition 13. During operation, the bracket 3 moves into the high-temperature zone, and the second electric push rod 41 pushes the sealing plate 4 to move up and close the feeding trough 131, forming a sealed cavity that isolates heat and ensures that the heat in the high-temperature zone is stable and concentrated. After stopping the operation, the sealing plate 4 moves down to open the channel, and the motor 34 moves the bracket 3 and the cured workpiece to the low-temperature zone for cooling, while effectively blocking the heat from being transferred to the closed door 2.

[0026] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A multi-stage variable temperature reverse gradient transformer curing oven, characterized in that, It includes a furnace body (1), a closed door (2) hinged to the opening of the furnace body (1), heating zones (11) located on both sides of the furnace body (1) symmetrically, a support plate (12) installed inside the furnace body (1), a partition (13) set on the top of the support plate (12) for heat insulation, and a bracket (3) located inside the furnace body (1) with adjustable orientation.

2. The multi-stage variable temperature reverse gradient transformer curing oven according to claim 1, characterized in that: The bracket (3) is composed of multiple arc-shaped rods (31). The bracket (3) is bowl-shaped and the top is tapered to prevent the workpiece from falling.

3. The multi-stage variable temperature reverse gradient transformer curing oven according to claim 2, characterized in that: An L-shaped connecting rod (32) is fixedly provided at the bottom of the bracket (3), and a first electric push rod (33) for adjusting the height of the bracket (3) is installed at the bottom of the L-shaped connecting rod (32).

4. The multi-stage variable temperature reverse gradient transformer curing oven according to claim 3, characterized in that: The first electric actuator (33) passes through the support plate (12) and a motor (34) is fixedly installed at the bottom. The motor (34) is fixedly connected to the bottom of the support plate (12).

5. The multi-stage variable temperature reverse gradient transformer curing oven according to claim 4, characterized in that: The motor (34) is used to control the arc rod (31) to rotate to both sides of the partition (13) so as to facilitate the picking and placing of workpieces on the bracket (3).

6. The multi-stage variable temperature reverse gradient transformer curing oven according to claim 5, characterized in that: The surface of the partition (13) is provided with a feeding groove (131), and the bottom of the support plate (12) is provided with a moving groove (121) that communicates with the feeding groove (131).

7. The multi-stage variable temperature reverse gradient transformer curing oven according to claim 6, characterized in that: The moving trough (121) is slidably provided with a sealing plate (4) for closing the feed trough (131).

8. The multi-stage variable temperature reverse gradient transformer curing oven according to claim 7, characterized in that: The bottom of the sealing plate (4) is fixedly provided with two symmetrical second electric actuators (41), which are used to control the opening and closing state between the sealing plate (4) and the feed trough (131).

9. The multi-stage variable temperature reverse gradient transformer curing oven according to claim 8, characterized in that: When the device is working, the motor (34) controls the bracket (3) to rotate to the side of the partition (13) away from the closed door (2), and the second electric push rod (41) controls the sealing plate (4) to close the feed chute (131); When the device stops working, the second electric push rod (41) controls the sealing plate (4) to move down, and the motor (34) controls the bracket (3) to rotate from the feed trough (131) to the side near the closed door (2) for cooling.

10. The multi-stage variable temperature reverse gradient transformer curing oven according to claim 1, characterized in that: The temperature of the heating zone (11) gradually decreases from low to high. The partition (13) divides the interior of the furnace body (1) into two areas. The side away from the closed door (2) is used for heating and curing, and the side close to the closed door (2) is used for cooling. At the same time, it reduces the heat transfer to the closed door (2) and avoids the closed door (2) from being too hot when it is opened, which may cause safety hazards.

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