A smart temperature-controlled transformer coil curing device

Abstract

This utility model discloses an intelligent temperature-controlled transformer coil curing device, including a hot air circulating oven. The hot air circulating oven includes a heating and curing chamber, and a rigid support fixture is provided in the heating and curing chamber to prevent deformation of the transformer coil. The rigid support fixture includes a main rod movably connected to the heating and curing chamber, several support bars arranged around the main rod and contacting the inner diameter of the transformer coil, and several adjusting rods respectively connected to the support bars. The adjusting rods are arc-shaped and made of elastic metal material, and their two ends are movably connected to the two ends of the main rod. The beneficial effect of this utility model is that during the heating and curing process, the transformer coil is fixed by the rigid support fixture, which effectively prevents deformation of large transformer coils during high-temperature curing, improving product quality and production safety. At the same time, the motor drives the rigid support fixture to rotate, and the transformer coil fixed on it rotates accordingly, which helps to improve heating uniformity.

Description

Technical Field

[0001] This utility model relates to the technical field of transformer coil processing equipment, and more specifically, it relates to an intelligent temperature-controlled transformer coil curing device. Background Technology

[0002] As the core equipment in a power system for transmitting, transforming, and distributing electrical energy, the reliability of a transformer's operation directly affects the safety and stability of the entire power grid. The transformer coil is the core of the transformer, and its manufacturing quality, especially the process of curing, has a decisive impact on the transformer's electrical performance, mechanical strength, insulation life, and short-circuit withstand capability.

[0003] Existing transformer coil curing processes generally employ hot air circulating ovens or ordinary vacuum impregnation and drying equipment. The basic principle is to place the impregnated coil in a heated environment, and through heat conduction and convection, the insulating varnish (such as epoxy resin, polyester resin, etc.) impregnated inside the coil undergoes a cross-linking chemical reaction at a certain temperature, thereby achieving curing and forming a robust overall insulation structure.

[0004] With technological advancements, some existing hot air circulating ovens have acquired basic intelligent temperature control capabilities. These systems typically employ a PLC (Programmable Logic Controller) or an industrial computer as the control core. They monitor the internal ambient temperature of the oven through integrated temperature sensors and, based on the set temperature value, use a PID (Proportional-Integral-Derivative) control algorithm to automatically adjust the power output of the heating element and the operating speed of the fan. This achieves more stable and precise temperature control than traditional relay contactor control, reducing temperature fluctuations.

[0005] However, existing hot air circulating ovens are usually just cavities and lack supporting fixtures specifically designed for transformer coils. During the high-temperature curing process, large transformer coils are prone to "collapse" inward due to their own weight and the fluidity of the insulating varnish, resulting in a shrinkage of the inner diameter, non-roundness, and deformation. This structural deformation directly changes the insulation distance between windings, leading to product scrap and posing significant safety hazards. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an intelligent temperature-controlled transformer coil curing device.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A smart temperature-controlled transformer coil curing device includes a hot air circulating oven, which includes a heating and curing chamber. The heating and curing chamber is equipped with a rigid support fixture to prevent deformation of the transformer coil. The rigid support fixture includes a main rod movably connected to the heating and curing chamber, several support bars surrounding the main rod and contacting the inner diameter of the transformer coil, and several adjusting rods respectively connected to the support bars. The adjusting rods are arc-shaped and made of elastic metal. A trapezoidal positioning block is fixed at both ends of each adjusting rod. Two symmetrically arranged positioning slots are opened on the main rod. The positioning slots are trapezoidal, and the two positioning blocks move within the two positioning slots respectively. Each positioning block has a slot, and the slot includes a latch. The slot on the positioning block engages with the latch in the positioning slot.

[0009] Further configured, the two ends of the main rod are respectively threaded with a first adjusting pipe and a second adjusting pipe, the first adjusting pipe is detachably connected to the top of the heating and curing chamber, and the second adjusting pipe is detachably connected to the bottom of the heating and curing chamber.

[0010] Further configured, the hot air circulating oven includes an installation chamber corresponding to the heating and curing chamber, a motor is installed in the installation chamber, and a connecting rod is fixed on the shaft of the motor, passing through the bottom of the heating and curing chamber and threadedly connected to the second adjusting pipe. The connecting rod is rotatably connected to the bottom of the heating and curing chamber through a bearing.

[0011] A further configuration is provided, wherein the top of the heating and curing chamber is rotatably connected to a positioning rod that is threadedly connected to the first adjusting pipe.

[0012] A further provision is that the surface of the support bar is provided with a Teflon gasket that contacts the inner diameter of the transformer coil.

[0013] Further configured, the main rod, support bar, and adjusting connecting rod of the rigid support fixture are all made of stainless steel.

[0014] By adopting the above technical solution, the beneficial effects of this utility model are as follows: During the heating and curing process, the transformer coil is fixed by a rigid support fixture, which effectively prevents the deformation of the large transformer coil during high-temperature curing, thereby improving product quality and production safety. At the same time, the motor drives the rigid support fixture to rotate, and the transformer coil fixed on it rotates accordingly, which helps to improve the uniformity of heating. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the structure of a rigid support fixture in conjunction with a transformer coil.

[0017] Figure 3 This is a magnified structural diagram of point A.

[0018] In the figure: hot air circulating oven 100, heating and curing chamber 101, rigid support fixture 102, transformer coil 103, main rod 1, support bar 2, adjusting connecting rod 3, positioning block 4, positioning groove 5, slot 6, latch 7, first adjusting pipe 8, second adjusting pipe 9, installation chamber 10, motor 11, connecting rod 12, positioning rod 13, Teflon gasket 14. Detailed Implementation

[0019] Reference Figures 1 to 3 The embodiments of this utility model will be further described below.

[0020] A smart temperature-controlled transformer coil curing device includes a hot air circulating oven 100, which includes a heating and curing chamber 101. The heating and curing chamber 101 is equipped with a rigid support fixture 102 to prevent deformation of the transformer coil 103. The rigid support fixture 102 includes a main rod 1 movably connected to the heating and curing chamber 101, several support bars 2 arranged around the main rod 1 and abutting against the inner diameter of the transformer coil 103, and several adjusting rods 3 respectively connected to the support bars 2. The adjusting rod 3 is arc-shaped and made of elastic metal. The main rod 1, support bar 2, and adjusting rod 3 of the rigid support fixture 102 are all made of stainless steel. Both ends of the adjusting rod 3 are fixed with a trapezoidal positioning block 4. The main rod 1 has two symmetrically arranged positioning grooves 5. The positioning grooves 5 are trapezoidal. The two positioning blocks 4 move in the two positioning grooves 5 respectively. The positioning blocks 4 have a slot 6. The positioning grooves 5 include a latch 7. The slot 6 on the positioning blocks 4 engages with the latch 7 in the positioning grooves 5.

[0021] Working principle: Before placing the transformer coil 103 into the hot air circulating oven 100, pressure is applied to the adjusting rod 3 to bring its two ends closer together, and the positioning blocks 4 at both ends of the adjusting rod 3 are respectively placed in the corresponding positioning grooves 5 on the main rod 1. At this time, the adjusting rod 3 arches into an arc shape, causing the support bar 2 on the adjusting rod 3 to expand radially to make it tightly contact the inner wall of the transformer coil 103. The slots 6 on the positioning blocks 4 at both ends of the adjusting rod 3 correspond to the latches 7 in the corresponding positioning grooves 5. When the adjusting rod 3 is released, the positioning blocks 4 at both ends of the adjusting rod 3 move in the corresponding positioning grooves 5 and engage with the latches 7. At this time, the positioning blocks 4 are engaged with the main rod 1 under the action of the adjusting rod 3. The end sidewall of the slot 5 abuts against the main rod 1, thereby fixing the adjusting rod 3 to the main rod 1. Then, the transformer coil 103 is sleeved on the support bar 2 of the adjusting rod 3. At this time, the support bar 2 abuts against the inner diameter of the transformer coil 103, thereby achieving the purpose of sleeved on the rigid support fixture 102, thus providing rigid support for the transformer coil 103 from the inside out. This effectively resists the deformation tendency of the transformer coil 103 to "collapse" inward due to its own weight and the flow of insulating varnish at high temperature, ensuring its geometric dimension stability. This fundamentally avoids the problem of changes in insulation distance and product scrap caused by deformation, significantly improving product quality and production safety.

[0022] The two ends of the main rod 1 are respectively threaded with a first adjusting pipe 8 and a second adjusting pipe 9. The first adjusting pipe 8 and the second adjusting pipe 9 correspond to the top and bottom of the heating and curing chamber 101, respectively. The hot air circulating oven 100 includes an installation chamber 10 corresponding to the heating and curing chamber 101. A motor 11 is installed in the installation chamber 10. A connecting rod 12 is fixed on the shaft of the motor 11, passing through the bottom of the heating and curing chamber 101 and threadedly connected to the second adjusting pipe 9. The connecting rod 12 is rotatably connected to the bottom of the heating and curing chamber 101 through a bearing. A positioning rod 13 is rotatably connected to the top of the heating and curing chamber 101 through a bearing and threadedly connected to the first adjusting pipe 8.

[0023] After the transformer coil 103 is fitted onto the rigid support fixture 102, the door of the hot air circulating oven 100 is opened and the transformer coil and the rigid support fixture 102 are placed into the heating and curing chamber 101 of the hot air circulating oven 100. The first adjusting pipe 8 and the second adjusting pipe 9 on the main rod 1 are rotated so that the first adjusting pipe 8 is threadedly connected to the positioning rod 13 at the top of the heating and curing chamber 101 and the second adjusting pipe 9 is threadedly connected to the connecting rod 12 at the bottom of the heating and curing chamber 101, thereby fixing the rigid support fixture 102 in the heating and curing chamber 101.

[0024] When the door of the hot air circulating oven 100 is closed, the hot air circulating oven 100 heats and cures the transformer coil. At the same time, the PLC of the hot air circulating oven 100 starts the motor 11. The motor 11 drives the second regulating pipe 9 to rotate through the connecting rod 12, which in turn drives the entire rigid support fixture 102 and the transformer coil 103 fixed on it to rotate slowly in the heating and curing chamber 101. The rotation of the transformer coil 103 allows its various surfaces to be alternately and evenly exposed to the hot air, eliminating the heating dead angles and temperature gradients that exist in the traditional static curing method due to the fixed hot air flow direction. This improves the uniformity of heating and ensures that the cross-linking curing reaction of the insulating varnish is carried out synchronously and evenly on the entire coil, further improving the curing quality and product consistency.

[0025] The support strip 2 has a Teflon gasket 14 on its surface that contacts the inner diameter of the transformer coil 103. Teflon (polytetrafluoroethylene) material has an extremely low coefficient of friction and excellent non-stick properties. Using it as a gasket between the support strip 2 and the inner wall of the coil effectively prevents the metal support strip 2 from scratching the insulation layer inside the coil during rotation or tightening. Simultaneously, even at high temperatures, it prevents molten insulating varnish from adhering to the support strip 2, facilitating easy demolding after curing.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A smart temperature-controlled transformer coil curing device, comprising a hot air circulating oven (100), the hot air circulating oven (100) including a heating and curing chamber (101), characterized in that, The heating and curing chamber (101) is provided with a rigid support fixture (102) for preventing deformation of the transformer coil (103). The rigid support fixture (102) includes a main rod (1) movably connected to the heating and curing chamber (101), several support bars (2) arranged around the main rod (1) and abutting against the inner diameter of the transformer coil (103), and several adjusting rods (3) respectively connected to the several support bars (2). The adjusting rods (3) are arc-shaped and made of elastic metal material. Both ends of the adjusting rods (3) are fixed with a trapezoidal positioning block (4). The main rod (1) has two symmetrically arranged positioning grooves (5). The positioning grooves (5) are trapezoidal. The two positioning blocks (4) move in the two positioning grooves (5) respectively. The positioning blocks (4) have slots (6). The positioning grooves (5) include tongues (7). The slots (6) on the positioning blocks (4) engage with the tongues (7) in the positioning grooves (5).

2. The intelligent temperature-controlled transformer coil curing device according to claim 1, characterized in that, The two ends of the main rod (1) are respectively threaded with a first adjusting pipe (8) and a second adjusting pipe (9). The first adjusting pipe (8) is detached from the top of the heating and curing chamber (101), and the second adjusting pipe (9) is detached from the bottom of the heating and curing chamber (101).

3. The intelligent temperature-controlled transformer coil curing device according to claim 2, characterized in that, The hot air circulating oven (100) includes an installation chamber (10) corresponding to the heating and curing chamber (101). A motor (11) is installed in the installation chamber (10). A connecting rod (12) is fixed on the shaft of the motor (11), which passes through the bottom of the heating and curing chamber (101) and is threadedly connected to the second regulating pipe (9). The connecting rod (12) is rotatably connected to the bottom of the heating and curing chamber (101) through a bearing.

4. The intelligent temperature-controlled transformer coil curing device according to claim 3, characterized in that, The top of the heating and curing chamber (101) is rotatably connected to a positioning rod (13) that is threadedly connected to the first regulating tube (8).

5. The intelligent temperature-controlled transformer coil curing device according to claim 1, characterized in that, The surface of the support bar (2) is provided with a Teflon gasket (14) that contacts the inner diameter of the transformer coil (103).

6. The intelligent temperature-controlled transformer coil curing device according to claim 1, characterized in that, The main rod (1), support bar (2), and adjusting rod (3) of the rigid support fixture (102) are all made of stainless steel.

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