An ultra-long papermaking wire steel reed

Abstract

The application relates to an ultra-long paper-making net steel reed, which comprises a steel reed body, the steel reed body is a long strip structure for paper web forming and guiding, and the length is 5.5m-16m. The steel reed body is made of 420J2 or 3Cr13 stainless steel plate material, is formed by die stamping, is connected in sections, and has high hardness and low deformation characteristics after heat treatment. The surface of the steel reed body is a continuous smooth structure, the cross section is a flat or arc surface structure, the deformation amount of the steel reed can be effectively reduced under the condition of the ultra-long size, the straightness stability is improved, the fiber and impurity adhesion is reduced, the garbage accumulation is reduced, the equipment operation cleanliness and continuity are improved, and the ultra-long paper-making net steel reed is suitable for wide or high-speed paper-making production lines.

Description

Technical Field

[0001] This application relates to the field of papermaking equipment, and in particular to an extra-long reed for papermaking wire. Background Technology

[0002] In the papermaking industry, the reed is one of the most important components of papermaking equipment. It is mainly used for guiding, shaping, and stabilizing the paper web during the forming process, and its performance directly affects the paper forming quality and the stability of equipment operation. As papermaking equipment develops towards higher speeds and wider widths, higher requirements are placed on the length, strength, and stability of the reed, especially in ultra-wide-width papermaking production lines, where the reed length often needs to reach several meters or even more than ten meters.

[0003] In existing technologies, steel reeds are mostly made of high-carbon steel materials such as 65Mn, and are usually made from round bars as raw materials, which are cut and then processed to form the required structure. This type of structure can meet basic usage requirements under conventional length conditions, but when the length of the steel reed increases to an ultra-long range, due to the inherent characteristics of the material and the limitations of the processing technology, problems such as large overall deformation and difficulty in ensuring straightness are prone to occur, which in turn affect the stability of paper web operation and reduce product quality.

[0004] In addition, traditional steel reeds are mostly made by shearing round materials, and their cross-sectional structure is relatively simple. In actual use, it is easy to form areas where fibers and impurities adhere. Especially in the high humidity and high speed papermaking environment, pulp residue is easy to accumulate on the surface of the steel reed, forming "garbage". This not only increases the difficulty of cleaning, but also affects the uniformity of paper web and the continuity of equipment operation.

[0005] Meanwhile, traditional materials are prone to corrosion or fatigue deformation during long-term use, further exacerbating the problem of decreased structural stability of the reed, increasing maintenance costs, and shortening its service life. These problems are particularly prominent in applications involving ultra-long reeds, becoming one of the key factors restricting the performance improvement of papermaking equipment.

[0006] Therefore, how to provide a papermaking reed structure that is suitable for ultra-long dimensions, can effectively reduce deformation, improve straightness stability, reduce impurity adhesion, and improve cleaning performance has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] In order to effectively reduce deformation, improve straightness stability, reduce impurity adhesion and improve cleaning performance of papermaking reed structure, this application provides an ultra-long papermaking wire reed.

[0008] The technical solution for an ultra-long papermaking wire reed provided in this application is as follows: An ultra-long papermaking wire reed includes a reed body, wherein the reed body is a long strip structure used for paper web forming and guiding in papermaking equipment, with a length of 5.5m to 16m; The steel reed body is made of stainless steel sheet, which is processed by die stamping to form a predetermined cross-sectional structure, and then connected after segmentation to form an integral structure. The stainless steel sheet is 420J2 or 3Cr13, and after heat treatment, it forms a steel reed body with high hardness and low deformation characteristics. The steel reed body has a continuous smooth surface and a flat or flow-guiding arc cross-section structure, which makes the steel reed body have low deformation and high straightness stability under ultra-long size conditions, and reduces the adhesion of fibers and impurities, thereby reducing waste accumulation and improving operational cleanliness.

[0009] By adopting the above technical solutions, selecting 420J2 or 3Cr13 stainless steel plates and combining them with die stamping processes, the reed body is transformed from a traditional round material structure to a plate-formed structure. This optimizes material properties and forming methods, effectively reducing residual stress during processing and use, and improving overall structural stability. Heat treatment of the reed body gives it both high hardness and good resistance to deformation. Even in ultra-long dimensions of 5.5m to 16m, it maintains minimal bending deformation and high straightness, meeting the requirements of wide-width and high-speed papermaking equipment. Furthermore, by designing continuous smooth surfaces and flat or flow-guiding curved cross-sections, the adhesion and retention of pulp on the reed surface are reduced, decreasing fiber and impurity accumulation, improving cleaning performance, reducing maintenance frequency, and extending service life.

[0010] Optionally, the length of the steel reed body is 10m to 16m, preferably 13.3m, and the width is 10 to 15mm.

[0011] By adopting the above technical solutions and limiting the length and width range of the reed, it is possible to meet the requirements of ultra-long use while taking into account structural strength and stability, improving straightness and adapting to wide-width papermaking equipment.

[0012] Optionally, the die stamping process includes sheet metal cutting to size, stamping, and edge shaping steps to reduce residual stress during processing, thereby reducing bending deformation during use.

[0013] By adopting the above technical solutions, residual stress during processing can be effectively reduced, bending deformation during use can be minimized, and the overall straightness and long-term operational stability of the reed can be improved.

[0014] Optionally, the segmented structure is connected by welding, plugging, or screwing, so that the overall reed can reduce the cumulative effect of overall deformation while ensuring the connection strength.

[0015] By adopting the above technical solutions, structural stress can be dispersed while ensuring connection strength, reducing the cumulative effect of overall deformation, and improving the straightness and stability of the reed.

[0016] Optionally, the hardness of the reed blades of the steel reed body is HRC40-55 after quenching and tempering treatment, so as to improve wear resistance and reduce the deformation tendency during long-term use.

[0017] By adopting the above technical solutions, the wear resistance of steel reeds can be improved and their microstructure properties can be stabilized, reducing deformation during long-term use and extending their service life.

[0018] Optionally, the surface of the reed blades of the steel reed body is polished or treated with an anti-stick coating to reduce the probability of fiber adhesion and reduce slurry residue.

[0019] By adopting the above technical solutions, surface roughness and adhesion can be reduced, fiber and slurry residues can be decreased, operational cleanliness can be improved, and maintenance frequency can be reduced.

[0020] Optionally, the cross-sectional guide arc surface structure is used to guide the flow of slurry to reduce local stagnation areas, thereby reducing impurity accumulation.

[0021] By adopting the above technical solutions, the cross-sectional guide arc surface structure can effectively guide the smooth flow of slurry, improve the flow field distribution, reduce local stagnation and dead zone formation, and reduce the probability of impurity deposition and accumulation, thereby improving the overall conveying and mixing uniformity and equipment operation stability.

[0022] Optionally, the reed blades of the steel reed body have less deformation and more stable straightness under the same length conditions compared to steel reeds prepared by shearing 65Mn round material.

[0023] Optionally, the reed blades of the steel reed body are less likely to form a garbage accumulation area during use, so as to reduce the cleaning frequency and improve the continuity of equipment operation.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. Utilizing 420J2 or 3Cr13 stainless steel sheets combined with die stamping and segmented connection structure, the reed maintains low residual stress and high structural stability even under ultra-long dimensions, improving straightness control. 2. Heat treatment enhances the hardness and wear resistance of the reed body, reducing deformation during long-term use and extending service life. 3. A continuous smooth surface and flat or flow-guiding arc cross-section structure improve pulp flow, reducing local stagnation and dead zones. 4. Reduces the probability of fiber and impurity adhesion, minimizing waste accumulation and improving reed cleanliness and maintenance efficiency. 5. Maintains stable structural performance even under ultra-long dimensions (5.5m–16m), meeting the requirements of wide-width and high-speed papermaking equipment. Attached Figure Description

[0025] Figure 1This is a schematic diagram of the overall structure of an ultra-long papermaking wire reed according to this application; Figure 2a A schematic diagram of the flat cross-section structure and the flow-guiding arc surface of the steel reed body; Figure 2b A schematic diagram of the cross-sectional flow-guiding arc surface of the steel reed body; Figure 3 This is a schematic diagram of the welded segmented connection structure of the steel reed body. Figure 4 A schematic diagram of a segmented connection structure for the reed body, using either plug-in or screw-in methods; Figure 5 A schematic diagram of a partial structure of a reed formed by a die stamping process; Figure 6 This is a schematic diagram showing the installation and use of a steel reed in a papermaking machine.

[0026] Explanation of reference numerals in the attached drawings: 1. Reed body; 1a. First section of reed body; 1b. Second section of reed body; 2a. Flat reed body; 2b. Guide arc reed body; 3a. Welded connection; 3b. Inserted pin; 3c. Bolt; 4a. Steel plate cutting to length; 4b. Stamping; 4c. Edge shaping; 5. Support base; 6. Paper machine wire section. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0028] This application discloses an ultra-long papermaking wire reed. (See also...) Figure 1 The steel reed body 1 is a long strip structure used for paper web forming and guiding in papermaking equipment, with a length of 5.5m to 16m; The steel reed body 1 is made of stainless steel sheet, which is processed by die stamping to form a predetermined cross-sectional structure, and then connected after segmentation to form an integral structure; the stainless steel sheet is 420J2 or 3Cr13, which is heat-treated to form a steel reed body with high hardness and low deformation characteristics. The steel reed body 1 has a continuous smooth surface and a flat or flow-guiding arc cross-section structure, which makes the steel reed body 1 have low deformation and high straightness stability under ultra-long size conditions, and reduces the adhesion of fibers and impurities, thereby reducing waste accumulation and improving operational cleanliness. Example 1

[0029] Reference Figures 1-6 This embodiment provides an ultra-long papermaking wire reed, including a reed body 1. The reed body 1 is a long strip structure used for paper web forming and guiding in papermaking equipment. Its overall length L is 5.5m to 16m. In a preferred embodiment, the length is 10m to 16m, and more preferably 13.3m, to adapt to the usage requirements of wide-width high-speed papermaking production lines. The reed body 1 is formed from stainless steel sheet, preferably 420J2 or 3Cr13 stainless steel sheet. By selecting this type of martensitic stainless steel material, the reed body 1 possesses both a certain degree of toughness and a high hardness, providing favorable microstructure conditions for subsequent heat treatment; The steel reed body 1 is processed into a predetermined cross-sectional structure by die stamping, and then connected to form an integral structure after segmentation. Specifically, the steel reed body 1 can be divided into a first segment 1a, a second segment 1b, and multiple extension segments. The segments are connected by welding, plugging, or screwing to form an integral long structure to meet the limitations of ultra-long size manufacturing and transportation. The steel reed body 1 has a continuous smooth surface structure and can be configured as a flat cross-section 2a or a flow-guiding arc cross-section 2b according to the operating conditions, thereby optimizing the slurry flow state and reducing local turbulence and stagnation areas while ensuring structural strength; During the operation of the papermaking equipment, the pulp flows between the wire section 6 and the reed body 1. The paper web is uniformly formed by the guiding action of the reed, and is supported by the support base 5. Example 2

[0030] In this embodiment, the steel reed body 1 is made of 420J2 or 3Cr13 stainless steel sheet, which is formed by die stamping and then subjected to overall heat treatment; Specifically, the heat treatment process includes quenching and tempering. The quenching temperature is controlled between 980℃ and 1050℃ to obtain a martensitic structure in the material. Tempering is then performed at a temperature controlled between 200℃ and 450℃ to eliminate internal stress and improve toughness and stability. After the above heat treatment, the hardness of the steel reed body 1 reaches the range of HRC40-55, thereby significantly improving wear resistance and reducing the tendency of plastic deformation during long-term operation; Compared with the traditional steel reeds prepared by shearing 65Mn round bar, the sheet metal stamping structure in this embodiment has a more uniform stress distribution, which can effectively reduce the phenomenon of residual stress concentration and enable the steel reed to maintain high straightness stability in ultra-long dimensions of 5.5m to 16m. Example 3

[0031] Reference Figure 5 In this embodiment, the die stamping process includes the following steps: Step 4a: Cutting the sheet to length 420J2 or 3Cr13 stainless steel sheets are cut to length according to the design dimensions to ensure material dimensional consistency and reduce the accumulation of subsequent processing errors. Step 4b: Stamping The sheet metal of a fixed length is placed in a special mold for stamping. The upper and lower molds work together to form a pre-defined reed cross-sectional structure, including a flat structure or a curved, guide-shaped structure. This step achieves cross-sectional forming through one or more stamping operations, thus avoiding material waste and stress concentration problems associated with traditional machining. Step 4c: Edge Shaping The edges of the stamped reed are shaped, including deburring, rounding, and trimming, to improve surface continuity and smoothness, reduce the probability of slurry adhesion, and minimize fiber residue. The above process can significantly reduce residual stress during processing and improve the overall straightness and dimensional stability of the reed. Example 4

[0032] Reference Figure 3 In this embodiment, the reed body 1 adopts a segmented structure design to adapt to the manufacturing and transportation requirements of ultra-long structures. The segments can be connected in three ways: 1) Welded connection 3a: The adjacent ends of the steel reed body 1 are butt-welded to form a continuous integral structure. After welding, the weld seam is ground and heat-treated to eliminate welding stress. 2) Plug-in connection 3b: A pin-connection structure is installed between adjacent sections to achieve axial positioning and structural connection through the pins; 3) Screw connection 3c: Mechanical fastening is achieved through a bolt and nut structure, ensuring a stable connection between the various sections of the reed. By using the above-mentioned segmented connection method, the overall steel reed can effectively disperse structural stress while ensuring connection strength, reduce the cumulative effect of overall deformation, and improve the straightness stability under long-length conditions. Example 5

[0033] Referring to Figure 2, the cross-sectional structure of the reed body 1 in this embodiment includes two forms: a flat structure 2a and a flow-guiding arc surface structure 2b. The flat structure 2a is suitable for conventional papermaking conditions and has high structural stability. The flow-guiding arc surface structure 2b is used for high flow rate or high concentration pulp conditions. It guides the flow direction of the pulp through the arc transition surface, allowing the pulp to pass smoothly along the surface of the reed. The flow-guiding arc surface structure 2b can effectively reduce the retention of pulp in local areas, reduce the probability of fiber accumulation and impurity deposition, thereby reducing the "pulp hanging" phenomenon and improving the cleanliness of the system. Example 6

[0034] In this embodiment, the surface of the reed blade of the steel reed body 1 can be polished or coated with an anti-stick coating. Polishing reduces the surface roughness to Ra≤0.8μm, thereby reducing the probability of fiber adhesion. Anti-sticking treatment can use a low surface energy coating, making it difficult for slurry to adhere to the surface of the steel reed. Through the above treatment methods, the adhesion of fibers and impurities during operation can be significantly reduced, the cleaning frequency can be reduced, and the continuity of equipment operation can be improved. Example 7

[0035] This embodiment compares and verifies with the traditional 65Mn round bar sheared reed. Under the same length conditions, the reed body 1 of this application has significantly reduced bending deformation and maintained more stable straightness due to the use of plate stamping and optimized cross-section design. At the same time, under long-term operation conditions, the traditional structure is prone to permanent deformation due to local stress concentration, while the structure of this application effectively alleviates this problem through segmented connection and heat treatment process. Example 8

[0036] Reference Figure 6 In the wire section 6 of the paper machine, the reed body 1 is installed and fixed by the support base 5. The pulp comes into contact with the reed during the movement of the wire section, achieving uniform forming. During long-term operation, because the reed of this application has a continuous smooth surface and a flow guiding structure, the pulp is not easy to form an accumulation area, thereby reducing the frequency of equipment cleaning and improving the continuity and stability of production.

[0037] This application utilizes multiple technical means, including material optimization, die stamping, segmented connection structure design, and flow guide section optimization, to achieve high straightness stability and low deformation performance of ultra-long papermaking wire reeds in the range of 5.5m to 16m. This significantly improves pulp adhesion and cleaning performance, and enhances overall service life and production efficiency. The implementation principle of an ultra-long papermaking wire reed according to an embodiment of this application is as follows: A predetermined cross-sectional structure is obtained by stamping 420J2 or 3Cr13 stainless steel sheet using a mold, and combined with a segmented connection method to form an ultra-long integral reed body. This optimizes the distribution of material structure and stress, thereby reducing residual stress and cumulative deformation during processing and use. Simultaneously, by quenching and tempering the reed body, its overall hardness and deformation resistance are improved, enabling it to maintain high straightness stability even with ultra-long dimensions of 5.5m to 16m. Furthermore, by setting a continuous smooth surface and a flat or flow-guiding arc-shaped cross-sectional structure, the pulp flows smoothly, reducing local stagnation and eddy current areas, thereby reducing the probability of fiber and impurity adhesion and reducing accumulation. Ultimately, this achieves a comprehensive technical effect in papermaking equipment where the reed possesses high structural stability, high wear resistance, and excellent cleaning performance.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A type of extra-long papermaking wire reed, characterized in that: Includes a steel reed body 1, which is a long strip structure used for paper web forming and guiding in papermaking equipment, with a length of 5.5m to 16m; The steel reed body 1 is made of stainless steel sheet, which is processed by die stamping to form a predetermined cross-sectional structure, and then continuously arranged to form an integral structure. The stainless steel sheet is 420J2 or 3Cr13, and after heat treatment, it forms a steel reed body with high hardness and low deformation characteristics. The steel reed body 1 has a continuous smooth surface and a flat or flow-guiding arc cross-section structure, which makes the steel reed body 1 have low deformation and high straightness stability under ultra-long size conditions, and reduces the adhesion of fibers and impurities, thereby reducing waste accumulation and improving operational cleanliness.

2. The extra-long papermaking wire reed according to claim 1, characterized in that: The width of the steel reed body 1 is 10m to 16m, preferably 13.3m, and the width of the reed piece is 10 to 15mm.

3. The extra-long papermaking wire reed according to claim 1, characterized in that: The die stamping process includes the steps of sheet metal cutting to size 4a, stamping 4b, and edge shaping 4c, in order to reduce residual stress during processing and thus reduce bending deformation during use.

4. The extra-long papermaking wire reed according to claim 1, characterized in that: The segmented structure is connected by welding method 3a, or by inserting or screwing in the form of pins 3b and bolts 3c, so that the overall reed can reduce the cumulative effect of overall deformation while ensuring the connection strength.

5. The extra-long papermaking wire reed according to claim 1, characterized in that: The hardness of the reed blades in the steel reed body is HRC40-55 after quenching and tempering treatment, so as to improve wear resistance and reduce the deformation tendency during long-term use.

6. The extra-long papermaking wire reed according to claim 1, characterized in that: The surface of the reed blades of the steel reed body 1 is polished or treated with an anti-stick coating to reduce the probability of fiber adhesion and reduce slurry residue.

7. The extra-long papermaking wire reed according to claim 1, characterized in that: The cross-sectional guide arc surface structure 2b is used to guide the flow of slurry to reduce local stagnation areas, thereby reducing impurity accumulation.

8. The extra-long papermaking wire reed according to claim 1, characterized in that: Compared to steel reeds made by shearing 65Mn round bar, the reed blades of the steel reed body 1 have less deformation and more stable straightness under the same length conditions.

9. The extra-long papermaking wire reed according to claim 1, characterized in that: The reed blades of the steel reed body 1 are less likely to form a garbage accumulation area during use, thereby reducing the cleaning frequency and improving the continuity of equipment operation.

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