Vacuum impregnation floating positioning device

Abstract

The utility model provides a kind of vacuum paint dipping floating positioning device, including tank, closed storehouse, the inner wall of the tank is fixedly connected with several closed storehouses, the inside fixedly connected with hydraulic cylinder of the closed storehouse, the end of the output end of hydraulic cylinder is fixedly connected with top disc;The top disc can be lifted, the inner wall of the tank is fixedly connected with several groups of tracks, and the track is located at the both sides of closed storehouse.The utility model has the advantages that when the output end of hydraulic cylinder retreats, top plate drops, hanger ring, base and coil thereon are moved down in paint liquid, coil is dynamic, can be in contact with paint liquid sufficiently, so that its paint dipping effect is more sufficient.In the process of vacuum paint dipping, the initiative, controllable up-and-down floating (dynamic paint dipping) of coil is realized.This completely changes the mode of traditional static paint dipping.The final result is that the filling rate and infiltration quality of paint liquid to the internal structure of coil are significantly improved, and the electrical insulation performance and mechanical strength of product are enhanced.

Description

Technical Field

[0001] This utility model relates to the field of coil impregnation technology, and in particular to a vacuum impregnation floating positioning device. Background Technology

[0002] In the manufacturing process of electrical equipment (such as transformers, motors, and reactors), coil insulation is a crucial step. Vacuum pressure impregnation (VPI), as an advanced process, is widely used because it significantly improves the insulation performance, mechanical strength, and moisture resistance of coils. The core step of this process is to place the coil in a vacuum chamber, evacuate the air and moisture from inside the coil and the pores of the insulation material, and then use vacuum negative pressure or supplemented pressure to fully penetrate and fill every tiny gap in the coil with insulating varnish.

[0003] However, the traditional vacuum impregnation process has revealed some key shortcomings in long-term practice, limiting further improvement in its impregnation effect:

[0004] Limitations of Static Impregnation: Current mainstream technologies typically involve fixing the coil to be impregnated on a support or base in an impregnation tank, injecting varnish after vacuuming, and maintaining the coil in a relatively static immersion state for a period of time. In this static impregnation mode, the varnish slowly penetrates into the coil mainly through vacuum capillary action and gravity. For coils with complex structures, narrow interlayer gaps, or numerous pores, the varnish flow resistance is high, the wetting speed is slow, and penetration "dead zones" or residual micro-bubbles can easily form in certain areas inside the coil, resulting in insufficient and uneven impregnation. This directly affects the coil's final insulation performance (such as dielectric loss, partial discharge level, and withstand voltage) and long-term operational reliability (susceptibility to moisture and hot spots). Therefore, a vacuum impregnation floating positioning device is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0006] Therefore, one objective of this utility model is to propose a vacuum impregnation floating positioning device to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0007] To achieve the above objectives, one embodiment of the present invention provides a vacuum impregnation floating positioning device, including a tank and a closed chamber. A plurality of closed chambers are fixedly connected to the inner wall of the tank, and a hydraulic cylinder is fixedly connected inside the closed chamber. A top plate is fixedly connected to the output end of the hydraulic cylinder.

[0008] The top plate is liftable, and the inner wall of the trough is fixedly connected with several sets of tracks, which are located on both sides of the enclosed chamber.

[0009] A top plate is movably connected to the inner side of the track, and rollers are movably connected to both sides and the front end of the top plate;

[0010] The roller is movably connected to the inner wall of the trough and the inner side of the track;

[0011] A hanging ring is fixedly connected to the rear end of the top plate, an inner frame is fixedly connected to the inner side of the hanging ring, a support column is fixedly connected to the bottom of the inner frame and the bottom of the hanging ring, and a base is fixedly connected to the bottom end of the support column.

[0012] The bottom surface of the top plate is provided with a positioning groove, which is connected to the top plate.

[0013] Preferably, of any of the above solutions, the tank is made of stainless steel and the tank is sealed and welded to the enclosed chamber.

[0014] The above technical solution is adopted: This device is specifically used for vacuum impregnation of coils. In this device, the tank is a portion of the vacuum impregnation tank.

[0015] During operation, a sealed top cover is placed on the top of the tank, and a vacuum pump is connected to create a vacuum inside the tank.

[0016] When the paint level inside the tank is at its highest (when the coil on the base is completely immersed in the paint), it is located below the top of the sealed chamber to prevent liquid from entering the sealed chamber.

[0017] When the device is in operation, multiple coils are placed evenly on the base, with the coils higher than the lifting rings. The lifting rings are secured at several points with steel wires and slowly lowered into the tank. During placement, the top plate is lowered along the track until the positioning groove of the top plate aligns with the top plate at the top of the hydraulic cylinder. The rollers on the top plate are movably connected to the inner wall of the tank and the inner side of the track. The rollers are designed to prevent jamming during the up-and-down movement of the top plate. Then, the lifting hook is removed, the tank is sealed, and after the lifting rings and base are in place, the coils are immersed in the paint liquid inside the tank. Simultaneously, a vacuum pump evacuates the tank.

[0018] When the hydraulic cylinder's output end extends, the top plate rises against the top plate, and the lifting ring, base, and coil on it move upwards in the varnish. When the hydraulic cylinder's output end retracts, the top plate descends, and the lifting ring, base, and coil on it move downwards in the varnish. The coil is dynamic, allowing for full contact with the varnish and resulting in more thorough impregnation. This process achieves active and controllable up-and-down floating of the coil (dynamic impregnation) during vacuum impregnation. This completely changes the traditional static impregnation method. The end result is a significant improvement in the filling rate and wetting quality of the varnish on the coil's internal structure, enhancing the product's electrical insulation performance and mechanical strength.

[0019] Preferably, in any of the above embodiments, the hydraulic cylinder is installed vertically, and the output end of the hydraulic cylinder passes through the top surface of the enclosed chamber. This movable connection is provided with multiple layers of sealing rings.

[0020] Equipment Composition: Tank Body: The main body of the vacuum impregnation tank (partial view shown). It is made of stainless steel, offering excellent corrosion resistance and structural strength, suitable for paint solutions and vacuum environments. The top of the tank is designed to be sealable; a sealing cap must be installed and connected to the vacuum pump during operation.

[0021] Sealed chambers: These are fixedly connected to the inner wall of the tank, and there are several of them. The sealed chambers are connected to the tank by a sealed weld, ensuring that the inside of the sealed chamber remains at normal pressure (or non-vacuum) when the inside of the tank is in a vacuum state, and strictly preventing paint from seeping in.

[0022] Hydraulic cylinder: Fixedly installed inside the sealed chamber. One hydraulic cylinder is installed in each sealed chamber. The hydraulic cylinder is installed vertically, with its output end (piston rod) protruding from the top surface of the sealed chamber. This movable connection is equipped with multiple layers of sealing rings to ensure that when the hydraulic cylinder is actuated, it can output power while maintaining the sealing integrity of the sealed chamber, preventing paint or the vacuum environment inside the tank from entering the sealed chamber.

[0023] Top plate: Fixedly connected to the end of the hydraulic cylinder output (i.e., the piston rod end). The top plate rises and falls with the extension and retraction of the hydraulic cylinder output.

[0024] Tracks: Fixedly connected to the inner wall of the tank. Tracks are arranged in pairs on both sides of the enclosed compartment. The tracks are typically welded to the inner wall of the tank to ensure strength and positional accuracy.

[0025] Top plate: It is movably connected to the inside of the track and can move up and down vertically under the constraint of the track.

[0026] Rollers: These are movably connected to the two sides and the front end face of the top plate. The rollers are horizontally positioned, with their outer circumferences contacting the inner wall of the trough and the inner side of the track, forming a rolling connection. The function of the rollers is to significantly reduce the frictional resistance of the top plate as it moves up and down along the track, effectively preventing jamming and ensuring smooth and stable movement.

[0027] Lifting ring: Fixedly connected to the rear end of the top plate (i.e., the end facing the center of the tank). The lifting ring is usually welded to the top plate. The lifting ring is ring-shaped or other frame structure, and its plane should be kept horizontal (i.e., parallel to the base).

[0028] Inner frame: Fixedly connected to the inside of the lifting ring, forming part of the lifting frame, providing additional structural strength and stable support points.

[0029] Support column: Fixedly connected to the bottom of the lifting ring (usually distributed under the inner frame).

[0030] Base: Fixedly connected to the bottom of the support column. The base is used to hold the coils to be impregnated. The coils should be evenly distributed and their height should be higher than the lifting ring to prevent the lifting ring from obstructing the coils during impregnation.

[0031] Positioning groove: This groove is located on the bottom surface of the top plate. It is designed to be circular (or another shape that allows for stable docking with the top plate), and its position and number correspond to the top plate of the hydraulic cylinder. When the top plate descends into position, the positioning groove precisely aligns with the top plate at the top of the hydraulic cylinder.

[0032] Preferably, in any of the above schemes, the tracks are arranged in pairs, and the tracks are welded to the inner wall of the trough.

[0033] Preferably, in any of the above embodiments, the top plate is welded to the hanging ring, and the hanging ring is parallel to the base.

[0034] Preferably, in any of the above embodiments, the roller is horizontally positioned and the positioning groove is circular in shape.

[0035] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0036] This vacuum impregnation floating positioning device works by extending the hydraulic cylinder's output end, causing the top plate to rise against the top plate, and the lifting ring, base, and coil on it to move upwards in the impregnation liquid. Conversely, when the hydraulic cylinder's output end retracts, the top plate descends, and the lifting ring, base, and coil on it move downwards in the impregnation liquid. The coil's dynamic movement allows for full contact with the impregnation liquid, resulting in more thorough impregnation. This process achieves active and controllable upward and downward floating of the coil (dynamic impregnation), completely changing the traditional static impregnation method. The end result is a significant improvement in the filling rate and wetting quality of the impregnation liquid within the coil's internal structure, enhancing the product's electrical insulation performance and mechanical strength.

[0037] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0038] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0039] Figure 1 This is a first-view structural schematic diagram of the present invention;

[0040] Figure 2 This is a structural schematic diagram of the present invention from a second perspective;

[0041] Figure 3 This is a schematic diagram of the structure of the tank body of this utility model;

[0042] Figure 4 This is a structural schematic diagram of the base of this utility model.

[0043] In the diagram: 1-Tank body, 2-Enclosed chamber, 3-Hydraulic cylinder, 4-Top plate, 5-Railway, 6-Top plate, 7-Roller, 8-Hanging ring, 9-Inner frame, 10-Support column, 11-Base, 12-Positioning slot. Detailed Implementation

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0046] like Figure 1-4 As shown, this vacuum impregnation floating positioning device includes a tank 1 and a closed chamber 2. Several closed chambers 2 are fixedly connected to the inner wall of the tank 1. A hydraulic cylinder 3 is fixedly connected inside the closed chamber 2. A top plate 4 is fixedly connected to the output end of the hydraulic cylinder 3.

[0047] The top plate 4 can be raised and lowered, and several sets of tracks 5 are fixedly connected to the inner wall of the tank 1. The tracks 5 are located on both sides of the enclosed chamber 2.

[0048] A top plate 6 is movably connected to the inner side of the track 5, and rollers 7 are movably connected to both sides and the front end of the top plate 6.

[0049] Roller 7 is movably connected to the inner wall of trough 1 and the inner side of track 5;

[0050] A hanging ring 8 is fixedly connected to the rear end of the top plate 6. An inner frame 9 is fixedly connected to the inner side of the hanging ring 8. A support column 10 is fixedly connected to the bottom of the inner frame 9 and the bottom of the hanging ring 8. A base 11 is fixedly connected to the bottom end of the support column 10.

[0051] The bottom surface of the top plate 6 is provided with a positioning groove 12, which is connected to the top plate 6.

[0052] Example 1: The tank body 1 is made of stainless steel and is sealed and welded to the enclosed chamber 2. The hydraulic cylinder 3 is installed vertically, with its output end passing through the top surface of the enclosed chamber 2. Multiple layers of sealing rings are installed at this movable connection. Tracks 5 are arranged in pairs and welded to the inner wall of the tank body 1. The top plate 6 is welded to the hanging ring 8, which is parallel to the base 11. The rollers 7 are horizontally positioned, and the positioning groove 12 is circular.

[0053] Example 2: This device is specifically designed for vacuum impregnation of coils. In this device, tank 1 is a portion of the vacuum impregnation tank.

[0054] During operation, a sealed top cover is placed on the top of tank 1, and a vacuum pump is connected to create a vacuum inside tank 1.

[0055] When the paint level inside the tank 1 is at its highest (when the coil on the base 11 is completely immersed in the paint), it is located below the top of the sealed chamber 2 to prevent liquid from entering the sealed chamber 2.

[0056] When the device is working, the coils are placed on the base 11, with multiple coils evenly distributed. The coils are higher than the lifting ring 8. Several points of the lifting ring 8 are suspended by steel wires and slowly lowered into the tank 1. During placement, the top plate 6 is lowered along the track 5 until the positioning groove 12 of the top plate 6 aligns with the top plate 4 at the top of the hydraulic cylinder 3. The rollers 7 on the top plate 6 are movably connected to the inner wall of the tank 1 and the inner side of the track 5. The design of the rollers 7 prevents the top plate 6 from getting stuck when moving up and down. Then the hook is removed, the tank 1 is closed, and after the lifting ring 8 and the base 11 are in place, the coils are immersed in the paint liquid inside the tank 1. At the same time, the vacuum pump evacuates the tank 1.

[0057] Device Composition: Tank 1: The main body of the vacuum impregnation tank (partial view shown). It is made of stainless steel, possessing excellent corrosion resistance and structural strength, suitable for paint solutions and vacuum environments. The top of Tank 1 is designed as a sealable structure; a sealing top cover must be installed and connected to the vacuum pump during operation.

[0058] Sealed chamber 2: Fixedly connected to the inner wall of tank 1, in several units. Sealed chamber 2 is connected to tank 1 by sealed welding to ensure that the inside of sealed chamber 2 remains at normal pressure (or non-vacuum) when the inside of tank 1 is in a vacuum state, and strictly prevents paint from seeping in.

[0059] Hydraulic cylinder 3: Fixedly installed inside the sealed chamber 2. One hydraulic cylinder 3 is installed in each sealed chamber 2. The hydraulic cylinder 3 is installed vertically, and its output end (piston rod) protrudes from the top surface of the sealed chamber 2. This movable connection is equipped with multiple layers of sealing rings to ensure that when the hydraulic cylinder 3 is actuated, it can output power while maintaining the sealing integrity of the sealed chamber 2, preventing paint or the vacuum environment inside the tank from entering the sealed chamber.

[0060] Top plate 4: Fixedly connected to the end of the output end of hydraulic cylinder 3 (i.e., the end of the piston rod). Top plate 4 rises and falls with the extension and retraction of the output end of hydraulic cylinder 3.

[0061] Track 5: Fixedly connected to the inner wall of tank 1. Tracks 5 are arranged in pairs on both sides of the enclosed chamber 2. Tracks 5 are usually welded to the inner wall of tank 1 to ensure strength and positional accuracy.

[0062] Top plate 6: It is movably connected to the inside of the track 5 and can move up and down in the vertical direction under the constraint of the track 5.

[0063] Roller 7: Movably connected to the two sides and the front end face of the top plate 6. The roller 7 is horizontally set, and its outer circumferential surface contacts the inner wall of the trough 1 and the inner side of the track 5 respectively, forming a rolling connection. The function of roller 7 is to significantly reduce the frictional resistance of the top plate 6 when it moves up and down along the track 5, effectively prevent jamming, and ensure smooth and stable movement.

[0064] Lifting ring 8: Fixedly connected to the rear end of the top plate 6 (i.e., the end facing the center of the tank). The lifting ring 8 and the top plate 6 are usually welded together. The lifting ring 8 is ring-shaped or has other frame structure, and its plane should be kept horizontal (i.e., parallel to the base 11).

[0065] Inner frame 9: Fixedly connected to the inside of the lifting ring 8, forming part of the lifting frame, providing additional structural strength and stable support points.

[0066] Support column 10: Fixedly connected to the bottom of the lifting ring 8 (usually distributed below the inner frame 9).

[0067] Base 11: Fixedly connected to the bottom end of support column 10. Base 11 is used to place the coil to be impregnated. The coils should be evenly distributed when placed, and their height should be higher than the hanging ring 8 to avoid the hanging ring obstructing the coils during impregnation.

[0068] Positioning groove 12: This groove is located on the bottom surface of the top plate 6. The positioning groove 12 is designed to be circular (or another shape that allows for stable docking with the top plate 4), and its position and number correspond to the top plate 4 of the hydraulic cylinder 3. When the top plate 6 descends to its final position, the positioning groove 12 precisely docks with the top plate 4 at the top of the hydraulic cylinder 3.

[0069] The working principle of this utility model is as follows:

[0070] Preparation stage: Place multiple coils to be impregnated evenly on base 11.

[0071] Select several suitable lifting points on the lifting ring 8 (and inner frame 9), and attach them at multiple points using wire ropes or hooks. Important note: When filling the impregnation tank 1 with paint, the highest paint level (i.e., when the base 11 with the coil is fully submerged) must be controlled below the top of the enclosed chamber 2. This fundamentally prevents paint from entering the enclosed chamber 2 during floating or when the tank is full, protecting the hydraulic cylinder 3.

[0072] Lifting and positioning: The entire hanging frame structure (including the hanging ring 8, inner frame 9, support column 10, base 11 and top plate 6) is slowly and steadily lowered into the tank 1 along the guide of the track 5 using the lifting mechanism.

[0073] When the top plate 6 descends to near the lowest preset position, the positioning groove 12 on the bottom surface of the top plate 6 will precisely align with the top plate 4 at the top of each hydraulic cylinder 3 and complete the docking.

[0074] During this process, the rollers 7 on both sides and at the front of the top plate 6 always maintain rolling contact with the inner wall of the trough 1 and the inner side of the track 5, ensuring a smooth and unobstructed lowering process.

[0075] After confirming that the gantry is in place and that the top plate 4 is correctly aligned with the positioning slot 12, remove the hook or loosen the tension of the wire rope.

[0076] Vacuum sealing stage: Install and secure the sealing top cover on top of tank 1 to form a closed space. Start the vacuum pump and evacuate the interior of tank 1 to the required vacuum level through the interface connected to the sealing top cover.

[0077] Dynamic impregnation stage (core process): Start the hydraulic system: Under the condition that the inside of the tank 1 is in a vacuum state and filled with paint, control the hydraulic cylinders 3 installed in each closed chamber 2 to work.

[0078] Coil Lifting: When the output end (piston rod) of hydraulic cylinder 3 pushes out, it drives top plate 4 to move upward. Top plate 4 pushes top plate 6, which it is connected to, to move upward along track 5. The upward movement of top plate 6 drives base 11 and all coils placed on it to move upward synchronously in the paint liquid through hanging ring 8 and support column 10.

[0079] Coil descent: When the output end (piston rod) of hydraulic cylinder 3 retracts, it drives the top plate 4 to move downward. At this time, under the action of gravity or hydraulic return force (or auxiliary return device, although not mentioned, it is often present in actual applications), the top plate 6 moves downward along the track 5, and at the same time drives the hanging ring 8, the base 11 and the coil to move downward synchronously in the paint liquid.

[0080] Dynamic impregnation: Hydraulic cylinder 3 drives top plate 4 to lift and release top plate 6 according to a set program (such as alternating extension and retraction or cycling at a specific frequency and stroke), thereby causing the coil to repeatedly float up and down in the paint liquid under vacuum. This forced dynamic motion:

[0081] Vigorously agitating the varnish around the coil breaks up air bubbles and low-pressure areas; under the pressure difference generated by the up-and-down movement, it significantly promotes the deep penetration of the varnish into the gaps, turns, and layers inside the coil; overcoming the problem of uneven and incomplete penetration caused by vacuum dead zones or surface tension of the varnish during static impregnation.

[0082] Completion and Removal: After the dynamic impregnation reaches the preset time and effect, stop the hydraulic cylinder 3 (normally stopped in the middle position or returned to its original position). Release the vacuum in tank 1 to atmospheric pressure. Open the sealing cover on the top of tank 1.

[0083] Reattach the lifting ring 8 (inner frame 9) at multiple points using hooks, and smoothly lift the entire hanging structure (including the varnish-impregnated coil) and remove the trough 1 along the track 5.

[0084] Compared with the prior art, the present invention has the following advantages:

[0085] This vacuum impregnation floating positioning device works as follows: when the output end of the hydraulic cylinder 3 extends, the top plate 4 rises against the top plate 6, causing the lifting ring 8, base 11, and the coil on it to move upwards in the varnish. When the output end of the hydraulic cylinder 3 retracts, the top plate 6 descends, causing the lifting ring 8, base 11, and the coil on it to move downwards in the varnish. The coil is dynamic, allowing for full contact with the varnish and resulting in a more thorough impregnation. This achieves active and controllable up-and-down floating of the coil during the vacuum impregnation process (dynamic impregnation). This completely changes the traditional static impregnation method. The end result is a significant improvement in the filling rate and wetting quality of the varnish on the internal structure of the coil, enhancing the electrical insulation performance and mechanical strength of the product.

Claims

1. A vacuum impregnation floating positioning device, characterized in that, Includes a tank (1) and a closed chamber (2). Several closed chambers (2) are fixedly connected to the inner wall of the tank (1). A hydraulic cylinder (3) is fixedly connected inside the closed chamber (2). A top plate (4) is fixedly connected to the output end of the hydraulic cylinder (3). The top plate (4) is liftable, and the inner wall of the trough (1) is fixedly connected with several sets of tracks (5), which are located on both sides of the enclosed chamber (2). The track (5) is movably connected to a top plate (6), and rollers (7) are movably connected to both sides and the front end of the top plate (6). The roller (7) is movably connected to the inner wall of the trough (1) and the inner side of the track (5); The rear end of the top plate (6) is fixedly connected to a hanging ring (8), the inner side of the hanging ring (8) is fixedly connected to an inner frame (9), the bottom of the inner frame (9) and the bottom of the hanging ring (8) are fixedly connected to a support column (10), and the bottom end of the support column (10) is fixedly connected to a base (11). The bottom surface of the top plate (6) is provided with a positioning groove (12), which is connected to the top plate (6).

2. The vacuum impregnation floating positioning device as described in claim 1, characterized in that: The tank (1) is made of stainless steel and is sealed and welded to the enclosed chamber (2).

3. The vacuum impregnation floating positioning device as described in claim 2, characterized in that: The hydraulic cylinder (3) is installed vertically, and the output end of the hydraulic cylinder (3) passes through the top surface of the enclosed chamber (2). This movable connection is provided with multiple layers of sealing rings.

4. The vacuum impregnation floating positioning device as described in claim 3, characterized in that: The tracks (5) are arranged in pairs, and the tracks (5) are welded to the inner wall of the trough (1).

5. The vacuum impregnation floating positioning device as described in claim 4, characterized in that: The top plate (6) is welded to the hanging ring (8), and the hanging ring (8) is parallel to the base (11).

6. The vacuum impregnation floating positioning device as described in claim 5, characterized in that: The roller (7) is set horizontally, and the positioning groove (12) is circular in shape.

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