Drying device for transformer after paint dipping
The vacuum drying device and the alternating dual drying chamber design solve the problems of low efficiency and paint film oxidation of the existing drying device, achieve fast and effective transformer drying, and improve insulation performance.
Patent Information
- Application Number
- CN202422650287.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-10-31
AI Technical Summary
Existing drying devices are inefficient and easily cause paint film oxidation, which cannot effectively remove moisture inside the transformer and affects insulation performance.
The vacuum drying method is adopted, which uses a vacuum pump to evacuate the air and a heating plate to heat the air. Combined with the alternating dual drying chamber design, the transformer can be dried quickly and oxidation can be avoided.
It improves the drying efficiency, ensures that the paint film is not oxidized, can effectively remove moisture inside the transformer, and improves insulation performance and drying quality.
Smart Images
Figure CN223405303U_ABST
Abstract
Description
Technical Field
[0001] The utility model specifically relates to the technical field of drying devices, in particular to a drying device for transformers after paint dipping. Background Art
[0002] Drying a transformer after varnish dipping is a crucial step in the transformer manufacturing process, significantly impacting its performance and quality. After varnish dipping, the solvent in the varnish must evaporate, allowing the paint film to solidify and form a strong insulating layer. The cured paint film better coats the transformer windings and core, improving insulation and preventing short circuits between windings or between the windings and the core. Despite moisture-proofing measures taken during the varnish dipping process, some moisture may still remain inside the transformer. The drying process removes this moisture, preventing moisture-induced insulation degradation during transformer operation and reducing the risk of leakage and malfunction.
[0003] Existing drying devices usually use a transmission line to transport the paint to an open dryer for drying, or use a dryer plus a blower to dry the paint. However, this drying efficiency is low, and due to the open drying method, the paint film is prone to oxidation during the drying process. Utility Model Content
[0004] The purpose of the utility model is to provide a device for drying transformers after paint dipping, which adopts a vacuum drying method to dry the dipped transformer, so that the transformer can be dried quickly, and drying in a vacuum environment can avoid the occurrence of paint film oxidation, so as to solve the technical problems raised in the above background technology.
[0005] To achieve the above objectives, the present invention provides the following technical solutions:
[0006] A device for drying transformers after varnish dipping, comprising a drying oven fixed to a frame, the drying oven comprising a drying chamber for drying products and an equipment chamber, the drying chamber and the equipment chamber being separated by a partition; a heating plate being provided in the middle of the drying chamber, dividing the drying chamber into two parts;
[0007] A plurality of slides are provided at the top and bottom of the drying chamber, and the plurality of slides are fixedly connected to the drying box; the plurality of slides are grouped into two, and the two slides in each group are symmetrically arranged, and a hanging rack is slidably connected inside each group of slides; a sealed door is movably connected to both sides of the drying box via a hinge.
[0008] As a further technical solution of the present invention, the top of the sealing door is locked and fixed to the fixing seat by a plum blossom bolt; a quick latch for quickly locking the sealing door is also provided on the top of the drying box.
[0009] As a further technical solution of the present invention, the hanging rack is arranged as a grid frame as a whole, and a number of hooks for facilitating the hanging of the transformer are welded on both sides of the grid frame.
[0010] As a further technical solution of the present invention, a vacuum pump is provided in the equipment cavity; the vacuum pump is connected to the drying cavity through a vacuum tube, and the vacuum pump is electrically connected to the vacuum pump switch through a wire; the vacuum pump switch is also connected to the main switch through a wire.
[0011] As a further technical solution of the present invention, the heating plate is electrically connected to a heating controller via a wire; the heating controller is connected in series with a timer and a main switch.
[0012] As a further technical solution of the present invention, two pressure gauges are connected to the outside of the drying box.
[0013] Compared with the prior art, the beneficial effects of the present invention are:
[0014] 1. When using this utility model, first hang the transformer to be dried on both sides of the hanging rack, then clamp the upper and lower ends of the hanging rack into the slide, and push the hanging rack into the drying chamber. Then, lock and fix the sealing door with quick latches or plum blossom bolts, and then evacuate the drying chamber with a vacuum pump; the heating plate heats the drying chamber to achieve vacuum drying of the transformer.
[0015] 2. In this utility model, the transformer is dried under reduced pressure. Reducing the pressure can lower the boiling point of the solvent, making the solvent in the paint more volatilizable. At the same time, the vacuum environment can reduce the presence of oxygen, preventing the paint film from oxidizing during the drying process. The vacuum drying speed is fast and the drying effect is good, which is especially suitable for occasions with high requirements for drying quality. It can effectively remove moisture deep inside the transformer.
[0016] 3. In the present invention, the heating plate divides the drying chamber into two; this makes the drying box have two drying chambers, which can be used alternately. When one drying chamber is drying, the other drying chamber can be used for unloading the dried transformer, which can reduce the waiting time of the staff and improve the drying efficiency of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a three-dimensional structural diagram of the utility model.
[0018] Figure 2 This utility model Figure 1 Schematic diagram of the rear structure.
[0019] Figure 3 This utility model Figure 1 Schematic diagram of part of the structure.
[0020] Figure 4 This utility model Figure 3 main view.
[0021] Figure 5 This utility model Figure 4 AA cross-sectional view.
[0022] In the figure: 1-frame, 2-drying box, 3-heating plate, 4-sealed door, 5-sliding seat, 6-quick latch, 7-fixing seat, 8-vacuum pump switch, 9-main switch, 10-Plum blossom bolt, 11-timer, 12-heating controller, 13-hanging rack, 14-pressure gauge, 15-equipment chamber, 16-vacuum pump. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0024] See also Figure 1-5 In an embodiment of the utility model, a device for drying transformers after paint dipping includes a drying box 2 fixed on a frame body 1, wherein the drying box 2 has a drying chamber for drying products and an equipment chamber 15, wherein the drying chamber and the equipment chamber 15 are separated by a partition; wherein a heating plate 3 is provided in the middle position of the drying chamber.
[0025] A plurality of slides 5 are provided at the top and bottom of the drying chamber, and the plurality of slides 5 are fixedly connected to the drying box 2; the plurality of slides 5 form a group of two, and the two slides 5 in each group are symmetrically arranged, and a hanging rack 13 is slidably connected inside each group of slides 5; the two sides of the drying box 2 are movably connected to the sealed door 4 by hinges.
[0026] By adopting the above technical solution, when in use, the transformer to be dried is first hung on both sides of the hanging rack 13, then the upper and lower ends of the hanging rack 13 are clamped in the slide 5, and the hanging rack 13 is pushed into the drying chamber, and then the sealing door 4 is locked and fixed by the quick latch 6 or the plum bolt 10, and then the drying chamber is evacuated by the vacuum pump 16; the heating plate 3 heats the drying chamber to achieve vacuum drying of the transformer;
[0027] The transformer is dried under reduced pressure. Reducing the pressure can lower the boiling point of the solvent, making the solvent in the paint more volatilizable. At the same time, the vacuum environment can reduce the presence of oxygen, preventing the paint film from oxidizing during the drying process. Vacuum drying is fast and has good drying effects, making it particularly suitable for applications with high drying quality requirements. It can effectively remove moisture deep inside the transformer.
[0028] Furthermore, the heating plate 3 divides the drying chamber into two; this enables the drying box 2 to have two drying chambers, which can be used alternately. When one drying chamber is drying, the other drying chamber can be used to unload the dried transformer, which can reduce the waiting time of the staff and improve the drying efficiency of the transformer.
[0029] In this embodiment, the top of the sealing door 4 is locked and fixed to the fixing seat 7 by a plum-shaped bolt 10; a quick latch 6 for quickly locking the sealing door 4 is also provided on the top of the drying box 2.
[0030] By adopting the above technical solution, the cooperation between the plum blossom bolt 10 and the fixing seat 7 and the provision of the quick latch 6 improves the sealing effect between the sealing door 4 and the drying box 2, so that the drying box 2 can be better vacuumed.
[0031] In this embodiment, the hanging rack 13 is configured as a grid frame as a whole, and a number of hooks are welded on both sides of the grid frame for facilitating the hanging of the transformer.
[0032] By adopting the above technical solution, the grid frame setting plus the hook setting can ensure that the dry gas can be evenly distributed in the drying chamber, so that the heat is evenly distributed, and the drying efficiency of the transformer is improved.
[0033] In this embodiment, a vacuum pump 16 is provided in the equipment chamber 15; the vacuum pump 16 is connected to the drying chamber through a vacuum tube, and the vacuum pump 16 is electrically connected to the vacuum pump switch 8 through a wire; the vacuum pump switch 8 is also connected to the main switch 9 through a wire.
[0034] Furthermore, the exhaust end of the vacuum pump 16 is connected to two vacuum tubes through a three-way valve, and a solenoid valve is connected in series to each vacuum tube. The solenoid valve is electrically connected to an external controller (not shown). The two solenoid valves are controlled to open and close separately by the external controller, so that the two drying chambers can work alternately, which greatly reduces the waiting time of the staff and improves the drying efficiency of the transformer.
[0035] In this embodiment, the heating plate 3 is electrically connected to the heating controller 12 via a wire; the heating controller 12 is connected in series with the timer 11 and the main switch 9 .
[0036] By adopting the above technical solution, after turning on the main switch 9, the drying time can be timed by using the timer 11, and the heating temperature of the heating plate 3 can be controlled by using the heating controller 12; through precise temperature and time control, the dried transformer can achieve better quality.
[0037] In this embodiment, two pressure gauges 14 are further connected to the outside of the drying box 2 .
[0038] The two pressure gauges 14 are used to monitor the pressure of the two drying chambers when evacuating the chambers, so as to ensure that the transformer can be dried in a vacuum state.
[0039] The working principle of the present invention is as follows: when in use, the transformer to be dried is first hung on both sides of the hanging rack 13, then the upper and lower ends of the hanging rack 13 are clamped in the slide 5, and the hanging rack 13 is pushed into the drying chamber, and then the sealing door 4 is locked and fixed by the quick latch 6 or the plum bolt 10, and then the drying chamber is evacuated by the vacuum pump 16; the heating plate 3 heats the drying chamber to achieve vacuum drying of the transformer;
[0040] The transformer is dried under reduced pressure. Reducing the pressure can lower the boiling point of the solvent, making the solvent in the paint more volatilizable. At the same time, the vacuum environment can reduce the presence of oxygen, preventing the paint film from oxidizing during the drying process. Vacuum drying is fast and has good drying effects, making it particularly suitable for applications with high drying quality requirements. It can effectively remove moisture deep inside the transformer.
[0041] Furthermore, the heating plate 3 divides the drying chamber into two; this enables the drying box 2 to have two drying chambers, which can be used alternately. When one drying chamber is drying, the other drying chamber can be used to unload the dried transformer, which can reduce the waiting time of the staff and improve the drying efficiency of the transformer.
[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.
[0043] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
Claims
1. A drying device for transformer after varnish dipping, characterized by: The drying box (2) is fixed on a frame (1), wherein the drying box (2) has a drying chamber for drying products and an equipment chamber (15), wherein the drying chamber and the equipment chamber (15) are separated by a partition; wherein a heating plate (3) is provided in the middle of the drying chamber, and the heating plate (3) divides the drying chamber into two parts; A plurality of slides (5) are provided at the top and bottom of the drying chamber, and the plurality of slides (5) are fixedly connected to the drying box (2); the plurality of slides (5) are grouped into two, and the two slides (5) in each group are symmetrically arranged, and a hanging rack (13) is slidably connected in each group of slides (5); and the two sides of the drying box (2) are movably connected to a sealed door (4) via a hinge.
2. The transformer post-varnish drying device according to claim 1, characterized in that: The top of the sealing door (4) is locked and fixed with a fixing seat (7) via a plum blossom bolt (10); a quick latch (6) for quickly locking the sealing door (4) is also provided on the top of the drying box (2).
3. The transformer post-varnish drying device according to claim 1, characterized in that: The hanging rack (13) is arranged as a grid frame as a whole, and a plurality of hooks for facilitating the hanging of the transformer are welded on both sides of the grid frame.
4. The transformer post-varnish drying device according to claim 1, characterized in that: A vacuum pump (16) is provided in the equipment chamber (15); the vacuum pump (16) is connected to the drying chamber via a vacuum tube, and the vacuum pump (16) is electrically connected to a vacuum pump switch (8) via a wire; the vacuum pump switch (8) is also connected to a main switch (9) via a wire.
5. The transformer post-varnish drying device according to claim 1, characterized in that: The heating plate (3) is electrically connected to a heating controller (12) via a wire; the heating controller (12) is connected in series with a timer (11) and a main switch (9).
6. The drying device for transformer after paint dipping according to claim 5, characterized in that: Two pressure gauges (14) are also connected to the outside of the drying box (2).