Long life papermaking forming fabric

Abstract

The utility model provides a long -life papermaking forming net, it solved the problem such as forming net machine service life is limited, it includes main net body, main net body is connected with contact guide roller transmission, its characterized in that, contact guide roller and main net body between setting up tensioning assembly, and contact guide roller and main net body's contact site is provided with the washing assembly and is equipped with the protection structure of washing assembly. The utility model has long service life, stable structure and other advantages.

Description

Technical Field

[0001] This utility model belongs to the field of paper forming technology, specifically relating to a long-life paper forming wire. Background Technology

[0002] The forming wire is a key component of the paper machine, used to carry pulp fibers, dewater and form the paper sheet. The performance of the forming wire directly affects paper quality, production efficiency, and cost. Factors affecting the lifespan of the forming wire mainly fall into two categories: the material and design selection of the forming wire itself, and the process conditions under which it is used. The process conditions mainly include the tension control of the forming wire, the paper machine speed, the wire vacuum, and the cleaning of the forming wire. Excessive tension accelerates forming wire fatigue and reduces its lifespan. The faster the paper machine runs, the more revolutions the forming wire makes, resulting in more severe wear and reduced forming wire lifespan. A higher wire vacuum increases the contact force between the forming wire and the vacuum chamber, leading to greater friction and more severe wear, thus reducing forming wire lifespan. Higher high-pressure cleaning during forming also causes greater damage to the forming wire, further reducing its lifespan.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a stacked wire mesh dry paper forming structure [201110001451.3], which has at least two forming parts, and each forming part has a forming part mesh belt at its bottom. The forming part mesh belt of the first forming part is located at the bottom of the forming part mesh belt after the first forming part, and the forming part mesh belt of the first forming part is superimposed on the forming part mesh belt after the first forming part.

[0004] The above solution has solved the problem of paper forming rate to some extent, but it still has many shortcomings, such as the limited service life of the web forming machine. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a long-life paper forming wire with a reasonable design that effectively extends the life of the wire body.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The long-life paper forming wire includes a main wire body, which is connected to a contact guide roller. The main wire body is characterized by a tensioning component between the contact guide roller and the main wire body, and a rinsing component is provided at the contact part between the contact guide roller and the main wire body, and the rinsing component is equipped with a protective structure.

[0007] In the aforementioned long-life paper forming wire, the main wire body includes a surface layer, a core layer, and a liner layer arranged in layers, and the weft diameter of the roller surface of the surface layer, the core layer, and the liner layer is 0.4~0.45mm.

[0008] In the aforementioned long-life paper forming wire, the contact guide roller includes a main guide roller, which has a wear-resistant surface that contacts the main wire body, and monitoring components are installed at both ends of the main guide roller.

[0009] In the aforementioned long-life paper forming wire, the monitoring component includes a fixed base that is rotatably connected to the main roller, and the fixed base has a built-in magnetorheological damper that is drively connected to the main roller.

[0010] In the aforementioned long-life paper forming wire, the tensioning assembly includes a tensioning guide roller arranged adjacent to the contact guide tube. The tensioning guide roller is movably connected to the fixed base via a telescopic connecting rod. The fixed base has a built-in tensioning motor, which is driven by the telescopic connecting rod via a gear and rack. The tension of the main wire body is 6.5~7.0KN / m.

[0011] In the aforementioned long-life paper forming wire, the rinsing assembly includes a rinsing pipe opposite to the contact guide roller and the main wire body. The rinsing pipe has jet nozzles arranged axially, and the jet nozzles are elongated and have outwardly extending guide plates.

[0012] In the aforementioned long-life paper forming wire, the protective structure includes a protective plate rotatably installed between the flushing pipe and the main wire body. The protective plate is connected to the flipping motor and has flow-blocking mesh holes evenly distributed on it.

[0013] In the aforementioned long-life paper forming wire, the flushing pipe is provided with a guide cavity and a diversion cavity connected in parallel with the guide cavity, and the flushing pipe pressure is 20~30 bar.

[0014] In the aforementioned long-life paper forming wire, the distance between the main wire body and the rinsing pipe is 40-45mm.

[0015] In the aforementioned long-life paper forming wire, the main wire body is made of polyester material.

[0016] Compared with existing technologies, the advantages of this utility model are as follows: the tensioning component can flexibly adjust the tension, reduce stress concentration points to ensure the flatness of the main wire body, thereby extending the overall service life of the forming wire; the rinsing component is equipped with a protective structure to regulate the rinsing water flow and avoid high pressure direct rays from affecting paper forming; the three-layer structure of the main wire body optimizes the stress distribution and wear resistance of the wire body, and the wire diameter control ensures the firmness of the wire surface. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is another structural schematic diagram of the present invention; Figure 4 This is a partial sectional view of the present invention; In the figure, the main mesh body is 1, the contact guide roller is 2, the main guide roller is 21, the wear-resistant surface is 22, the fixed base is 23, the magnetorheological damper is 24, the tensioning assembly is 3, the tensioning guide roller is 31, the telescopic connecting rod is 32, the tensioning motor is 33, the flushing assembly is 4, the flushing pipe is 41, the jet outlet is 42, the guide plate is 43, the protective structure is 5, the protective plate is 51, the flipping motor is 52, the flow-blocking mesh is 53, the flow-guiding cavity is 54, and the flow-dividing cavity is 55. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1-4 As shown, a long-life paper forming wire includes a main wire body 1, which is drivenly connected to a contact guide roller 2. A tensioning assembly 3 is provided between the contact guide roller 2 and the main wire body 1. A rinsing assembly 4 is provided at the contact area between the contact guide roller 2 and the main wire body 1, and the rinsing assembly 4 is equipped with a protective structure 5. This design aims to improve the stability and lifespan of the forming wire in high-speed papermaking processes by optimizing tension control, cleaning, and protection mechanisms to reduce wear and clogging.

[0020] Specifically, the main wire body 1 comprises a surface layer, a core layer, and a backing wire arranged in layers. The weft yarn diameter of the surface layer, core layer, and backing wire is 0.4~0.45mm. The surface layer is in direct contact with the pulp and is responsible for the initial shaping of the paper. It is usually woven with high density to provide a smooth surface. The core layer serves as a support layer, enhancing the overall tensile strength and abrasion resistance. The backing wire acts as a connector and buffer, preventing interlayer displacement. Precise control of the weft yarn diameter ensures the flexibility and durability of the wire body while reducing fiber adhesion.

[0021] Specifically, the contact guide roller 2 includes a main guide roller 21, which has a wear-resistant surface 22 that contacts the main web body 1. Monitoring components are installed at both ends of the main guide roller 21. The wear-resistant surface 22 is typically coated with tungsten carbide or ceramic to resist high-speed friction and chemical corrosion, extending the life of the guide roller. The monitoring components detect the rotational speed, vibration, and temperature of the main guide roller 21 in real time to prevent overload or misalignment and ensure smooth transmission.

[0022] In addition, the monitoring components include a fixed base 23 rotatably connected to the main guide roller 21, and a magnetorheological damper 24 internally connected to the main guide roller 21 for transmission. The magnetorheological damper 24 uses a magnetic field to control the fluid viscosity, achieving active damping adjustment, effectively absorbing shocks and vibrations, reducing fluctuations in the main mesh body 1, and improving operating accuracy. The fixed base 23 also integrates sensors, and the data can be transmitted to the central control system for intelligent monitoring.

[0023] Meanwhile, the tensioning assembly 3 includes a tensioning guide roller 31 arranged adjacent to the contact guide tube. The tensioning guide roller 31 is movably connected to the fixed base 23 via a telescopic connecting rod 32. The fixed base 23 has a built-in tensioning motor 33, which is connected to the telescopic connecting rod 32 via a gear and rack. The tension of the main mesh 1 is 6.5~7.0 KN / m. The tensioning motor 33 drives the gear and rack mechanism according to real-time tension feedback to adjust the extension of the telescopic connecting rod 32, thereby precisely controlling the position of the tensioning guide roller 31 and maintaining constant tension. This tension range has been optimized to avoid slippage caused by excessive looseness of the mesh, and to prevent premature fatigue fracture caused by excessive tightness.

[0024] As can be seen, the rinsing assembly 4 includes a rinsing pipe 41 opposite to the contact guide roller 2 and the main mesh body 1. The rinsing pipe 41 has jet nozzles 42 arranged axially, which are elongated and have outwardly extending guide plates 43. The elongated design of the jet nozzles 42 ensures that the water flow evenly covers the width of the main mesh body 1, while the guide plates 43 guide the water flow to impact the mesh surface at the optimal angle, improving cleaning efficiency while reducing water splashing. The rinsing pipe 41 is typically made of stainless steel, which is corrosion-resistant and easy to clean.

[0025] Clearly, the protective structure 5 includes a protective plate 51 rotatably mounted between the flushing pipe 41 and the main net body 1. The protective plate 51 is connected to the tilting motor 52, and the protective plate 51 has evenly distributed baffle mesh holes 53. During non-flushing periods, the protective plate 51 can be rotated to a closed position by the tilting motor 52 to cover the flushing pipe 41, preventing impurities from entering or causing accidental damage. The baffle mesh holes 53 allow some airflow to pass through, reducing the impact on the operating resistance of the main net body 1, and at the same time, they act as a buffer when water flows, preventing high-pressure water from directly impacting the net body.

[0026] Preferably, the flushing pipe 41 is provided with a guide cavity 54 and a diversion cavity 55 connected in parallel with the guide cavity 54, and the pressure of the flushing pipe 41 is 20~30 bar. The guide cavity 54 is responsible for distributing the main water flow and ensuring stable outlet pressure of the jet port 42; the diversion cavity 55 serves as an auxiliary channel to balance the internal flow and prevent excessive local pressure. This pressure range can effectively remove fibers and fillers from the mesh while avoiding damage to the mesh structure.

[0027] Clearly, the distance between the main mesh 1 and the flushing pipe 41 is 40-45mm. This distance has been optimized through fluid dynamics simulation to ensure that the impact force of the flushing water flow is maximized, while reducing energy loss and mesh vibration, thereby improving the cleaning effect and mesh life.

[0028] In addition, the main wire body 1 is made of polyester. Polyester has advantages such as high strength, wear resistance, chemical corrosion resistance and low water absorption, making it suitable for humid and high-temperature papermaking environments. It can significantly extend the service life of the forming wire and reduce the frequency of replacement.

[0029] In summary, the principle of this embodiment is as follows: by using a layered polyester main mesh 1 with a weft diameter of 0.4~0.45mm and operating at a constant tension of 6.5~7.0 KN / m, the tensioning component 3, which is composed of a gear and rack driven telescopic link 32 with a built-in tensioning motor 33, achieves precise control. At the same time, at both ends of the contact guide roller 2 equipped with wear-resistant surface 22, the magnetorheological damper 24 connected to the main guide roller 21 in the fixed seat 23 actively suppresses vibration to ensure transmission smoothness. It is supplemented by an integrated rinsing and protection mechanism, namely, high-pressure cleaning is performed by the rinsing pipe 41 with a guide cavity 54 and a diversion cavity 55, the pressure is maintained at 20~30 bar and it is 40-45mm away from the main mesh. The protective structure 5, which is composed of a protective plate 51 with baffle mesh holes 53 that can be driven by a flip motor 52, provides physical shielding during non-operation periods, thereby systematically and synergistically improving the mechanical durability and anti-clogging performance of the formed mesh.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0031] Although this document frequently uses terms such as main mesh body 1, contact guide roller 2, main guide roller 21, wear-resistant surface 22, fixed base 23, magnetorheological damper 24, tensioning assembly 3, tensioning guide roller 31, telescopic connecting rod 32, tensioning motor 33, flushing assembly 4, flushing pipe 41, jet outlet 42, guide plate 43, protective structure 5, protective plate 51, tilting motor 52, flow-blocking mesh 53, flow-guiding cavity 54, and flow-dividing cavity 55, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A long-life papermaking forming wire comprising a main wire body (1) which is drivingly connected with a contact roll (2), characterized in that, A tensioning assembly (3) is provided between the contact guide roller (2) and the main mesh body (1), and a rinsing assembly (4) is provided at the contact part between the contact guide roller (2) and the main mesh body (1), and the rinsing assembly (4) is equipped with a protective structure (5).

2. The long-life paper forming wire according to claim 1, characterized in that, The main mesh body (1) includes a surface layer, a core layer and a liner mesh arranged in layers, wherein the diameter of the weft yarn on the roller surface of the surface layer, the core layer and the liner mesh is 0.4~0.45mm.

3. A long life papermaking forming fabric according to claim 1 wherein, The contact guide roller (2) includes a main guide roller (21), which has a wear-resistant surface (22) that contacts the main mesh body (1), and monitoring components are installed at both ends of the main guide roller (21).

4. The long-life paper forming wire according to claim 3, characterized in that, The monitoring component includes a fixed base (23) rotatably connected to the main roller (21), and the fixed base (23) has a built-in magnetorheological damper (24) that is drively connected to the main roller (21).

5. A long-life paper forming wire according to claim 4, characterized in that, The tensioning assembly (3) includes a tensioning guide roller (31) arranged adjacent to the contact guide tube. The tensioning guide roller (31) is movably connected to the fixed base (23) through a telescopic connecting rod (32). The fixed base (23) has a built-in tensioning motor (33). The tensioning motor (33) is connected to the telescopic connecting rod (32) through a gear and rack. The tension of the main net body (1) is 6.5~7.0 KN / m.

6. A long life papermaking forming fabric according to claim 1 wherein, The flushing assembly (4) includes a flushing pipe (41) opposite to the contact guide roller (2) and the main mesh body (1). The flushing pipe (41) has jet ports (42) arranged in an axial direction. The jet ports (42) are elongated and have outwardly extending guide plates (43).

7. A long life papermaking forming fabric according to claim 6, characterized in that The protective structure (5) includes a protective plate (51) rotatably installed between the flushing pipe (41) and the main mesh body (1). The protective plate (51) is connected to the flipping motor (52) for transmission. The protective plate (51) has flow-blocking mesh holes (53) evenly distributed on it.

8. A long-life paper forming wire according to claim 6, characterized in that, The flushing pipe (41) is provided with a flow guide cavity (54) and a flow divider cavity (55) connected in parallel with the flow guide cavity (54). The pressure of the flushing pipe (41) is 20~30 bar.

9. A long life papermaking forming fabric according to claim 6, characterized in that, The distance between the main mesh body (1) and the flushing pipe (41) is 40-45mm.

10. The long life papermaking forming fabric according to claim 1, wherein The main mesh body (1) is made of polyester material.

Images