Packaging method based on transformer iron core
By designing four packaging methods for transformer cores, the inefficiency and rust problems in the existing technology are solved, efficient and safe core packaging is achieved, and service life is extended.
Patent Information
- Application Number
- CN202410001288.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-02
- Publication Date
- 2025-07-04
AI Technical Summary
The existing transformer core packaging methods rely on manual labor, are inefficient and cannot be standardized, resulting in rust in contact with the core and air, affecting service life.
Four different types of transformer core packaging methods are provided: simple yoke packaging, yoke packaging, overall fine packaging and multi/single overall packaging, including appearance inspection, cleaning, cutting anti-rust paper and agricultural film, installation corner protection, winding film packaging and other steps to ensure the anti-rust and transportation safety of the core.
It improves packaging efficiency, reduces damage and rust of the core during transportation, and extends the service life of the core.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to the field of transformer core packaging, specifically a packaging method based on transformer cores. Background Art
[0002] A transformer is a device that changes the voltage of alternating current through the principle of electromagnetic induction. It mainly consists of a primary coil, a secondary coil, and a core. The core is mainly formed by laminating and wrapping multiple silicon steel sheets together. In the prior art, the packaging method of transformer cores is that workers or machines stack the silicon steel sheets together in sequence, and then bundle the silicon steel sheets with packaging belts to form a complete core. After that, workers assemble the core with the armature and the housing to form a complete transformer. The existing packaging technology relies on manual packaging, which not only has low work efficiency, but also because workers cannot standardize the implementation of packaging processes and techniques, simply bundling the core will cause the core to come into contact with air, there is a possibility of rust, reducing the service life of the core and affecting product quality. Therefore, the present invention provides different packaging methods for different packaging requirements of transformer cores. Summary of the Invention
[0003] In view of the deficiencies of the prior art, the present invention provides a packaging method for transformer cores.
[0004] To achieve the above objectives, the technical solutions provided by the present invention are as follows: According to different packaging requirements, the packaging methods for transformer cores will also vary, mainly divided into 4 types of packaging methods: upper yoke simple packaging, upper yoke fine packaging, overall fine packaging, and multi / single unit overall packaging.
[0005] The steps for the upper yoke simple packaging of the transformer core are as follows: First, conduct an appearance inspection on the processed transformer core, and then perform production preparation and cleaning inspection; After the cleaning inspection is completed, start cutting anti-rust paper and installing corner protectors; After cutting and installing the corner protectors, perform packaging with anti-rust paper and winding film. After all packaging is completed, conduct an appearance inspection on the transformer core again.
[0006] The steps for the upper yoke fine packaging of the transformer core are as follows: First, conduct an appearance inspection on the processed transformer core, and then perform production preparation and cleaning inspection; After the cleaning inspection is completed, start cutting anti-rust paper, agricultural film, and installing corner protectors; After cutting and installing the corner protectors, perform packaging with anti-rust paper and agricultural film. After the packaging of anti-rust paper and agricultural film is completed, perform upper yoke winding film packaging on the transformer core; After completing the winding film packaging of the upper yoke, the transformer core is subjected to overall plastic film packaging. After all the packaging is completed, the appearance of the transformer core is inspected again.
[0007] The steps for the overall fine packaging of the transformer core are as follows: First, the appearance of the processed transformer core is inspected, and then production preparation and cleaning inspection are carried out; After the cleaning inspection is completed, anti-rust paper and agricultural film are cut and corner protectors are installed; After cutting and installing the corner protectors, anti-rust paper and agricultural film are packaged. After the anti-rust paper and agricultural film are packaged, anti-rust powder is adhered to the inner side of the anti-rust paper with double-sided tape. After the anti-rust powder is adhered, moisture-proof powder is spread between the anti-rust paper and the agricultural film; After the moisture-proof powder is spread, the transformer core is subjected to winding film packaging. After all the packaging is completed, the appearance of the transformer core is inspected again.
[0008] The steps for the overall packaging of multiple / single units are as follows: First, the appearance of the processed transformer core is inspected, and then production preparation and cleaning inspection are carried out; After the cleaning inspection is completed, the corresponding sizes of the anti-rust paper and the agricultural film are calculated and the anti-rust paper and the agricultural film are cut; After cutting, the materials are pre-laid in sequence, and the packaging materials are sorted and fixed; After the packaging materials are fixed, the transformer core is hoisted onto the packaging materials. After the hoisting of the transformer core is completed, EPE, desiccant and anti-rust powder are placed; After the anti-rust powder is placed, the transformer core is packaged with anti-rust paper and winding film. After the anti-rust paper and winding film are packaged, rectangular tubes are tightened; After all the packaging is completed, the appearance of the transformer core is inspected again.
[0009] In summary, the beneficial effects of the present invention are as follows: 1. The packaging method described in the present invention can effectively solve the problems of moisture absorption and rust of the transformer core during transportation or storage, and reduce the damage caused by collision during transportation to the transformer core.
[0010] 2. The present invention provides different solutions for different packaging requirements, greatly improving the packaging efficiency and reducing the packaging time. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is the flow chart of the simple packaging of the upper yoke Figure 2 It is the flow chart of the fine packaging of the upper yoke Figure 3 It is the flow chart of the overall fine packaging Figure 4 It is the flow chart of the overall packaging for multiple / single units Specific implementation method
[0012] The following further explains the present application in conjunction with the accompanying drawings
[0013] As Figure 1 shown in the packaging steps of the upper yoke simple packaging, Step 1: Conduct an appearance inspection on the transformer core to ensure that there is no rust, oil stain, etc. on the appearance of the transformer core; ensure that the glue or paint applied to the transformer core has dried; ensure that the transformer core is attached with a certificate of conformity. Check the packaging design requirements; determine the packaging method of the transformer core; confirm whether the tools and materials are ready. Clean and remove dust from the unpainted parts of the transformer core with process wiping paper. If there is rust, remove the rust with a scouring pad and then suck out the magazine particles with a vacuum cleaner to finally ensure that the surface of the transformer core is clean without debris; check whether the accessories attached to the core for packing are well wrapped with PE winding film and firmly tied with wire ties; check whether the fasteners of the transformer core are tightened and whether the auxiliary clamp of the transformer core is firmly fixed
[0014] Step 2: Use a tape measure to measure the circumference of the transformer core between the length clamps of the upper yoke column, and cut 1 piece of rust-proof paper according to the size. Take out two L-shaped foam corner protectors and place them 10 mm away from the corners on both sides of the upper yoke of the transformer core. Use 100 mm of winding film to wind the L-shaped foam corner protectors and the transformer core as a whole for 5 circles for fixation
[0015] Step 3: Place the meteorological rust-proof paper closely along the center position of the upper yoke, and fold the two ends at 90 degrees to cover the corners; wind the upper yoke of the transformer core with 2 layers of PE winding film to complete the packaging
[0016] Step 4: After the overall packaging of the transformer core is completed, check the packaging situation of the transformer core to ensure that the packaging of the transformer core is not damaged or deformed and meets the requirements for shipment
[0017] As Figure 2 shown in the steps of the upper yoke fine packaging, Step 1: Conduct an appearance inspection on the transformer core to ensure that there is no rust, oil stain, etc. on the appearance of the transformer core; ensure that the glue or paint applied to the transformer core has dried; ensure that the transformer core is attached with a certificate of conformity. Check the packaging design requirements; determine the packaging method of the transformer core; confirm whether the tools and materials are ready. Clean and remove dust from the unpainted parts of the transformer core with process wiping paper. If there is rust, remove the rust with a scouring pad and then suck out the magazine particles with a vacuum cleaner to finally ensure that the surface of the transformer core is clean without debris; check whether the accessories attached to the core for packing are well wrapped with PE winding film and firmly tied with wire ties; check whether the fasteners of the transformer core are tightened and whether the auxiliary clamp of the transformer core is firmly fixed
[0018] Step 2: Use a tape measure to measure the perimeter of the transformer core between the upper yoke columns and the clamping parts, and cut 4 pieces of rust-proof paper according to the dimensions; cut 4 pieces of agricultural film according to the dimensional requirements. Take out two L-shaped foam corner protectors and place them 10 mm away from the corners on both sides of the upper yoke of the transformer core. Use 100 mm of winding film to wind the L-shaped foam corner protectors and the entire transformer core 5 times for fixation.
[0019] Step 3: Upper yoke packaging: Cover the upper yoke of the transformer core with the rust-proof paper, with the printed side facing outwards, ensuring that the centers are consistent; use a utility knife to vertically cut the rust-proof paper along the edges of the three columns, and do not expose parts such as the clamping parts of the transformer core; pass the rust-proof paper through the inner side of the window, overlap it with the rust-proof paper on the other side and then tighten it, and use transparent tape to stick the joint firmly. Avoid the lifting holes when packaging the edges of the clamping parts; wrap the agricultural film tightly around the upper yoke of the transformer core in the same steps as above. Side column and middle column packaging: Start from the lower end face of the main stage of the upper yoke of the transformer core, hold the rust-proof paper at an angle of about 20 degrees, press the rust-proof paper on the back side against the uppermost end face, and then tighten and fasten the rust-proof paper; wrap the agricultural film tightly around the three columns of the transformer core in the same steps as above.
[0020] Step 4: Use 500 mm wide plastic film to wind the parts of the rust-proof paper and agricultural film that have been packaged on the upper yoke of the transformer core for more than 2 layers. The winding length of the winding film for the three-column part is required to exceed the part wrapped by the agricultural film by 15 mm; use 500 mm wide plastic film to package the entire transformer core in two layers, starting from the lower edge of the lower clamping part and continuously winding to the upper edge of the upper clamping part of the transformer core to ensure the overall tightness of the transformer core.
[0021] Step 5: After the overall packaging of the transformer core is completed, check the packaging situation of the transformer core to ensure that the packaging of the transformer core is free of damage and deformation and meets the requirements for shipment.
[0022] As Figure 3 shown in the overall fine packaging steps, Step 1: Conduct an appearance inspection on the transformer core to ensure that the appearance of the transformer core is free of rust, oil stains, etc.; ensure that the glue or paint applied to the transformer core has dried; ensure that the transformer core is attached with a certificate of compliance. Check the packaging design requirements; determine the packaging method of the transformer core; confirm whether the tools and materials are ready. Use process wiping paper to clean and remove dust from the unpainted parts of the transformer core. If there are rust marks, use a Scotch-Brite pad to remove rust and then use a vacuum cleaner to suck out the magazine particles. Finally, ensure that the surface of the transformer core is clean and free of debris; check whether the accessories attached to the iron core for packing are well wrapped with PE winding film and firmly tied with wire ties; check whether the fasteners of the transformer core are tightened and whether the secondary clamping parts of the transformer core are firmly fixed.
[0023] Step 2: Use a tape measure to measure the thickness of the transformer core, the length of the upper yoke, the length of the unpainted upper yoke, the window width, the perimeter of the upper yoke, the length of the upper yoke connected to the clamping parts, and the perimeter of the middle column. Cut the rust-proof paper according to the size requirements: 1. For the thickness of the transformer core * (the length of the upper yoke + the length of the unpainted upper yoke + 200 mm), use 1 piece of rust-proof paper. When the thickness of the transformer core is less than or equal to 200 mm, choose rust-proof paper with a width of 200 mm and it can be cut; when the thickness of the transformer core is greater than 200 mm and less than or equal to 1000 mm, choose rust-proof paper with a width of 1000 mm and it can be cut. 2. For (the window width + 50 mm) * (the perimeter of the upper yoke + 50 mm), use two pieces of rust-proof paper. When the window width is less than or equal to 150 mm, choose rust-proof paper with a width of 200 mm and it can be cut; when the window width is greater than 150 mm and less than or equal to 950 mm, choose rust-proof paper with a width of 1000 mm and it can be cut; when the window width is greater than 950 mm and less than or equal to 1550 mm, choose rust-proof paper with a width of 1600 mm and it can be cut. 3. For (the perimeter of the upper yoke + 50 mm) * (the length of the upper yoke + the length of the unpainted upper yoke + 200 mm), use 1 piece of rust-proof paper. When the perimeter of the upper yoke is less than or equal to 950 mm, choose rust-proof paper with a width of 1000 mm and it can be cut; when the perimeter of the upper yoke is greater than 950 mm and less than or equal to 1550 mm, choose rust-proof paper with a width of 1600 mm and it can be cut; when the perimeter of the upper yoke is greater than 1550 mm, use rust-proof paper with widths of 200 mm, 1000 mm, and 1600 mm and paste them as needed. 4. For (the length of the unpainted part + 50 mm) * (the perimeter of the middle column + 50 mm), use 3 pieces of rust-proof paper. When the length of the unpainted part is greater than or equal to 150 mm, choose rust-proof paper with a width of 200 mm and it can be cut; when the length of the unpainted part is greater than 150 mm and less than or equal to 950 mm, choose rust-proof paper with a width of 1000 mm and it can be cut.
[0024] Use a tape measure to measure the thickness of the transformer core, the length of the upper yoke, the length of the unpainted part of the upper yoke, the width of the window, the perimeter of the upper yoke, the length of the upper yoke connected to the clamping parts, and the perimeter of the middle column. Cut the agricultural film according to the size requirements: 1. For one piece of agricultural film with dimensions of (perimeter of the upper yoke + 50 mm) * (length of the upper yoke + length of the unpainted part of the upper yoke + 200 mm). If the perimeter of the upper yoke is less than or equal to 950 mm, choose an agricultural film with a width of 1000 mm and it can be cut; if the perimeter of the upper yoke is greater than 950 mm and less than or equal to 1550 mm, choose a 1600 mm agricultural film and it can be cut; if the perimeter of the upper yoke is greater than 1550 mm, use agricultural films with widths of 200 mm, 1000 mm and 1600 mm and paste them as needed. 2. The size of the agricultural film for packaging the middle column: (height of the middle column + 50 mm) * (perimeter of the middle column + 50 mm). Use 3 pieces of agricultural film. If the height of the middle column is greater than or equal to 950 mm, choose an agricultural film with a width of 1000 mm and it can be cut; if the height of the middle column is greater than 950 mm and less than or equal to 1550 mm, choose a 1600 mm agricultural film and it can be cut. 3. For one piece of agricultural film with dimensions of (perimeter of the lower yoke + 50 mm) * (length of the lower yoke + width of the lower yoke + 400 mm). If the perimeter of the lower yoke is less than or equal to 950 mm, choose an agricultural film with a width of 1000 mm and it can be cut; if the perimeter of the lower yoke is greater than 950 mm and less than or equal to 1550 mm, choose a 1600 mm agricultural film and it can be cut; if the perimeter of the lower yoke is greater than 1550 mm, use agricultural films with widths of 200 mm, 1000 mm and 1600 mm and paste them as needed.
[0025] Step 3: Install foam corner protectors at both ends of the upper yoke; pre-install 4 M12 bolts on the upper clamping parts; select the size of the rust-proof paper: (thickness of the transformer core) * (length of the upper yoke + length of the unpainted part of the upper yoke + 200 mm), and cover the surface of the upper yoke of the transformer core; select the size of the rust-proof paper: (width of the window + 50 mm) * (perimeter of the upper yoke + 50 mm), and wind it around the upper yoke window for one circle, and bond the interface with tape; select the size of the rust-proof paper: (length of the unpainted part + 50 mm) * (perimeter of the middle column + 50 mm), and wrap the unpainted part of the middle column; select the size of the rust-proof paper and agricultural film: (perimeter of the upper yoke + 50 mm) * (length of the upper yoke + length of the unpainted part of the upper yoke + 200 mm), and let the rust-proof paper and agricultural film cover the entire window from the upper end of the clamping parts downwards; stick the rust-proof powder on the inner side of the rust-proof paper with double-sided tape, at the main clamping parts of the upper yoke, place one on each side, and spread the moisture-proof powder between the rust-proof paper and the agricultural film on the upper yoke. For the transformer core with auxiliary clamping parts, remove the horizontal auxiliary clamping parts; package the middle column with agricultural film; lift the transformer core and package the lower yoke with agricultural film.
[0026] Step 4: Pack the upper yoke with blue winding film, at least wind 2 layers; pack the middle column with blue winding film, at least wind 2 layers; lift the transformer core, and then pack the lower yoke with winding film, at least wind 2 layers; make a break at the 4 bolts of the upper clamping parts to install lifting rings; install the auxiliary clamping parts; paste the standard logo.
[0027] Step 5: After the overall packaging of the transformer core is completed, check the packaging condition of the transformer core to ensure that the packaging of the transformer core is free of damage and deformation and meets the requirements for shipment.
[0028] Such as Figure 4 shown in the overall packaging steps of multiple units. Step 1: Conduct an appearance inspection on the transformer core to ensure that the appearance of the transformer core is free of rust, oil stains, etc.; ensure that the glue or paint applied to the transformer core has dried; ensure that the transformer core is attached with a certificate of conformity. Check the packaging design requirements; determine the packaging method of the transformer core; confirm whether the tools and materials are ready. Clean and remove dust from the unpainted parts of the transformer core with process wiping paper. If there are rust marks, remove the rust with a scouring pad and then suck out the magazine particles with a vacuum cleaner to finally ensure that the surface of the transformer core is clean without debris; check whether the accessories attached to the iron core for packing are well wrapped with PE winding film and firmly tied with cable ties; check whether the fasteners of the transformer core are tightened and whether the auxiliary clamp of the transformer core is firmly fixed.
[0029] Step 2: Calculate the sizes of the rust-proof paper and agricultural film: The cutting size for single-unit overall packaging: The dimensions of the transformer core are height H * width W * thickness T (all dimensions are calculated based on the maximum values); The cutting sizes of the agricultural film and rust-proof paper are: length = H * 2 + T * 2 + 100 mm, width = W + T + 200 mm.
[0030] Step 3: After placing the pallet at the designated position in the packaging area, the pre-laying sequence and direction of the packaging materials are as follows: the length direction is parallel to the length direction of the upper beam of the wooden pallet. After pre-laying the packaging materials, roll up the part that extends beyond the pallet. Ensure that the packaging materials are aligned with each other and the center is above the pallet, and use pressing blocks to fix the packaging materials at the four corners of the wooden pallet. Use a utility knife to cut a small opening in the outermost anti-rust paper at the edge or center of the wooden pallet, insert a piece of paper as a positioning mark, and use this mark as a reference to hoist the transformer core onto the wooden pallet in sequence and align them with each other. When hoisting the transformer core onto the pallet, the first one is preferably placed in the middle (except for 1 or 2 units on a single pallet), and it requires two-person operation. When hoisting the second one, one person needs to hold the first transformer core to prevent it from tipping over. After placing the second transformer core, use a tightening strap to fasten the first and second ones together, and then place the subsequent transformer cores. When stacking the transformer cores, stagger the secondary clamping parts of adjacent transformer cores by 50 mm in height, and make the secondary clamping part of one transformer core close to the clamping iron plate of another transformer core. Placement of EPE (only required for oil-transformer): Place EPE at the clamping screw of each transformer core. At the sharp corners of the outer contour (cuboid) of multiple transformer cores and at both ends of the outermost secondary clamping parts, wrap EPE respectively. Pre-lay a layer of anti-rust paper and a layer of agricultural film at the window position of multiple transformer cores. The printed side of the anti-rust paper faces outward, and the agricultural film contacts the desiccant. The anti-rust paper should be able to completely cover the upper end face of the lower yoke of multiple transformer cores. Use a utility knife to cut both ends of the anti-rust paper and the agricultural film, and then use transparent tape to fix them on the clamping iron plates on both sides of the window. Fix the desiccant flat on the agricultural film with transparent tape (double-sided tape). On the surface of the anti-rust paper at the window, stick several packages of anti-rust powder with double-sided tape. The number of anti-rust powder packages is the same as the number of transformer cores in the overall packaging. Wrap the two pre-laid anti-rust papers around the whole pallet of transformer cores from the inside to the outside in sequence and fix them preliminarily with transparent tape. Wrap the two pre-laid double-layer agricultural films around the whole pallet of transformer cores from the inside to the outside in sequence and fix them preliminarily with transparent tape.
[0031] Step 4: Outside the agricultural film, use stretch film to wrap the whole pallet of transformer cores. The winding direction is from bottom to top, and the winding overlap rate is 50% (all four corners at the bottom need to be wrapped). Use two rectangular tubes to fix the whole pallet of transformer cores to the load-bearing pallet. The length direction of the rectangular tubes is perpendicular to the length direction of the upper clamping part of the transformer core. The torque of the fixing bolts of the rectangular tubes is 40 mm. Attach the outer label of the overall packaging and its relevant markings to the outer packaging, and the position is centered and pasted in the forklift transportation direction.
[0032] Step 5: After the overall packaging of the transformer core is completed, check the packaging condition of the transformer core to ensure that the packaging of the transformer core is intact and not deformed, meeting the requirements for shipment.
[0033] The four packaging methods of the present invention are simple to operate, highly practical, time-saving and labor-saving, meeting the packaging requirements of transformer cores. Moreover, the process provided by the present invention is clear and definite, enabling the packaging process of transformer cores to become more concise.
[0034] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements made shall fall within the protection scope of the present invention.
Claims
1. A packaging method based on a transformer core, characterized in that Including: S1. Conduct visual inspection, production preparation, and cleaning inspection on the transformer core; S2. Cut anti-rust paper and agricultural film according to different specifications and requirements based on the packaging method of the transformer core, install corner protectors, and wind the film; S2-1. Determine whether the requirement for packaging the transformer is upper yoke simple packaging, upper yoke fine packaging, overall fine packaging, or multi-unit overall packaging. According to different packaging requirements of the transformer core, cut anti-rust paper and agricultural film, install corner protectors, and wind the film for packaging; S3. Package the transformer core with the cut anti-rust paper, agricultural film, and other packaging materials; S3-1. Conduct different anti-rust paper and agricultural film packaging according to different specifications and requirements based on the packaging method of the transformer core; S3-2. Package with anti-rust powder, moisture-proof powder, and EPE according to different specifications and requirements based on the packaging method of the transformer core; S3-3. Conduct winding film packaging according to different specifications and requirements based on the packaging method of the transformer core; S4. Use the packaging method of the transformer core to conduct sub-clamp packaging and logo pasting on the transformer core; S5. Conduct visual inspection on the packaged transformer core using the packaging method of the transformer core.
2. The packaging method based on a transformer core according to claim 1, characterized in that, The visual inspection, production preparation, and cleaning inspection of the transformer core include: Ensure that the appearance of the transformer core has no rust or oil stains; Determine the packaging method of the transformer core and ensure that tools and materials are ready; Check whether the fasteners of the transformer core are tightened and whether the sub-clamps of the transformer core are secure.
3. The packaging method based on a transformer core according to claim 1, wherein The materials cut according to different specifications and requirements based on the packaging method of the transformer core include: According to the packaging requirements of the transformer core, measure the transformer core, cut anti-rust paper and agricultural film according to the size, and install corner protectors on the upper yoke.
4. The packaging method based on a transformer core according to claim 1, characterized in that, Before packaging the transformer core with anti-rust paper, the whole transformer core needs to be wound with 5 turns of winding film for fixation.
5. The packaging method based on a transformer core according to claim 1, characterized in that, When packaging the upper yoke fine-packaged transformer core with anti-rust paper and agricultural film, the lifting holes should be exposed.
6. The packaging method based on a transformer core according to claim 1, characterized in that The packaging of the transformer core with EPE is only required for oil-transformer transformers in this step.