Vacuum dehydration device suitable for slurry compounding position of cylinder mould

Abstract

A vacuum dewatering device suitable for a pulp compounding position of a circular cylinder mould relates to the technical field of papermaking appliances and comprises the circular cylinder mould which is rotatably arranged, a blanket is movably attached to the upper portion of the circular cylinder mould, a couch roll attached to the blanket is rotatably arranged above the blanket, and a vacuum pipe parallel to the circular cylinder mould is slidably arranged on one side of the couch roll in the longitudinal direction. Two suction soft plates are fixedly connected to the outer wall of the vacuum tube in parallel, the lower ends of the two suction soft plates make friction contact with the upper surface of the blanket, the area between the two suction soft plates is communicated with an inner cavity of the vacuum tube, and the vacuum tube is further lifted in the vertical direction to adjust the height of the vacuum tube. The utility model solves the problems that the extrusion effect between the blanket and the cylinder mould in the prior art can cause the instantaneous water pressure of the pulp with high water content, if the moisture is not discharged in time, the local damage of the fiber structure of the pulp is easily caused, the phenomena of embossing and crushing are shown, and finally, the uniformity of finished paper is reduced, and the physical property is degraded.

Description

Technical Field

[0001] This utility model relates to the field of papermaking equipment technology, specifically to a vacuum dewatering device applicable to the composite section of cylinder wire mesh pulp. Background Technology

[0002] In the papermaking industry, the cylinder wire cage is a crucial piece of equipment in high-grammage paper machines. It adsorbs pulp on its surface and works in conjunction with felt to complete the initial forming and multi-layer lamination of the paper sheet. However, in multi-layer pulp lamination processes, the insufficient dewatering efficiency at the angle between the cylinder wire cage and felt (i.e., the lamination point) has long been a problem. When the pulp is transferred to the lamination point with the cylinder wire cage, the squeezing action between the felt and the cylinder wire cage causes instantaneous water pressure in the high-moisture-content pulp. If the water is not drained in time, it can easily lead to localized damage to the pulp fiber structure, manifesting as embossing (uneven fiber accumulation) and crushing (structural collapse), ultimately resulting in decreased paper uniformity and deterioration of physical properties.

[0003] Currently, industry solutions to this problem mainly include optimizing blanket air permeability, adjusting the vacuum level of the wire mesh cage, or adjusting parameters such as the distance between the bed roller and the center of the wire mesh cage. However, these methods have limitations:

[0004] First, traditional vacuum dehydration devices have insufficient coverage: existing equipment is mostly designed for one side of the mesh cage or blanket, making it difficult to accurately act on the instantaneous high water pressure area of ​​the composite point.

[0005] Second, poor dynamic adaptability: the blanket is prone to shaking during operation due to the action of the vacuum suction box, making it difficult for the dehydration element to fit tightly, resulting in unstable suction efficiency.

[0006] Third, the structure is complex and the maintenance cost is high: some improvement solutions require major modifications to the paper machine structure, which is not economically viable.

[0007] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a vacuum dewatering device suitable for the composite process of pulp and wire mesh. This device solves the problem that the squeezing action between the felt and the wire mesh in traditional technologies can cause instantaneous water pressure in pulp with high water content. If the water is not drained in time, it can easily cause local damage to the pulp fiber structure, manifested as embossing and crushing, ultimately leading to a decrease in paper uniformity and deterioration of physical properties.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A vacuum dewatering device for composite materials in a circular wire mesh cage includes a rotatably mounted circular wire mesh cage. A blanket is movably attached to the top of the circular wire mesh cage. A roller is rotatably mounted above the blanket and attached to it. A vacuum tube is slidably mounted on one side of the roller and arranged parallel to the circular wire mesh cage. Two suction plates are fixedly attached to the outer wall of the vacuum tube in parallel. The lower ends of the two suction plates are in frictional contact with the upper surface of the blanket. The area between the two suction plates is connected to the inner cavity of the vacuum tube. The height of the vacuum tube can also be adjusted vertically.

[0011] As an optimized solution, several rigid support plates are fixedly connected side by side between the two suction soft plates along the axial direction of the circular mesh cage.

[0012] As an optimized solution, two longitudinal support blocks are fixedly arranged side by side on the frame, and the two ends of the vacuum tube are slidably mounted on the longitudinal support blocks via longitudinal rods.

[0013] As an optimized solution, the longitudinal support block is provided with a longitudinal sliding hole along the longitudinal direction, and the longitudinal rod is slidably disposed in the longitudinal sliding hole.

[0014] As an optimized solution, the lower end of the longitudinal support block is threaded with a fixing knob, and the end of the fixing knob abuts against the longitudinal rod.

[0015] As an optimized solution, one end of the longitudinal moving rod is fixedly connected to a vertical moving support block, and the vacuum tube is slidably mounted on the vertical moving support block via the vertical moving rod.

[0016] As an optimized solution, the vertical moving support block is vertically provided with a vertical moving sliding hole, and the vertical moving rod is slidably disposed in the vertical moving sliding hole.

[0017] As an optimized solution, the vertical moving rod is provided with a threaded section, and a fixing nut is connected to the threaded section in parallel. The two fixing nuts are located on the upper and lower sides of the vertical moving support block and abut against the vertical moving support block.

[0018] As an optimized solution, the upper surface of the longitudinal support block is fixed to the frame by a support frame.

[0019] As an optimized solution, the vacuum tube has a suction channel in the area between the two suction plates, and the vacuum tube has fixing plates fixed to the outer walls of the upper and lower edges of the suction channel, respectively, and the two suction plates are correspondingly fixed to the two fixing plates.

[0020] As an optimized solution, a side-blocking plate is fixed between the opposite ends of the two suction plates.

[0021] As an optimized solution, the suction plate is a rubber plate.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] The design combines a suction-operated flexible plate with two fixed plates, forming an adjustable flexible sealing interface. A rigid support plate between the two plates prevents excessive deformation due to vacuum suction. When the lower end of the rubber plate contacts the blanket, it adapts to the blanket surface using its own elasticity, solving the sealing failure problem caused by blanket tension fluctuations in traditional rigid scrapers.

[0024] Extrusion-Suction Synergistic Dewatering: A roller is set in the composite extrusion zone of the circular wire mesh cage and the blanket to apply mechanical extrusion force synchronously, and a vacuum tube is set to achieve vacuum suction force, which improves the moisture removal rate of the slurry layer. Compared with single extrusion dewatering, the efficiency is improved. The vacuum negative pressure intensity is dynamically adjusted according to the weight and speed of the machine.

[0025] By adjusting the vacuum tube longitudinally and vertically, the angle can be adaptively adjusted to adjust the contact point between the rubber sheet and the blanket, thus adapting to the dewatering requirements of different roller eccentricities. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0029] In the diagram: 1-Roller; 2-Frame; 3-Fixing knob; 4-Vacuum tube; 5-Fixing plate; 6-Suction soft plate; 7-Circular mesh cage; 8-Fixing nut; 9-Blanket; 10-Longitudinal movement rod; 11-Longitudinal movement support block; 12-Support frame; 13-Vertical movement support block; 14-Vertical movement rod. Detailed Implementation

[0030] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0031] like Figure 1 and Figure 2As shown, a vacuum dewatering device suitable for the composite of circular wire mesh cage and slurry includes a rotatably mounted circular wire mesh cage 7, a blanket 9 that is movably attached to the top of the circular wire mesh cage 7, a roller 1 that is rotatably attached to the blanket 9, a vacuum tube 4 that is slidably mounted on one side of the roller 1 along the longitudinal direction and is arranged parallel to the circular wire mesh cage 7, two suction plates 6 that are fixedly attached parallel to each other on the outer wall of the vacuum tube 4, the lower ends of the two suction plates 6 that are in frictional contact with the upper surface of the blanket 9, the area between the two suction plates 6 that is connected to the inner cavity of the vacuum tube 4, and the height of the vacuum tube 4 can also be adjusted vertically.

[0032] Several rigid support plates are fixedly connected side by side between the two suction soft plates 6 along the axial direction of the circular mesh cage 7.

[0033] Two longitudinal support blocks 11 are fixedly arranged side by side on the frame 2, and the two ends of the vacuum tube 4 are slidably set on the longitudinal support blocks 11 through the longitudinal rods 10.

[0034] The longitudinal support block 11 has a longitudinal sliding hole horizontally opened along the longitudinal direction, and the longitudinal rod 10 is slidably set in the longitudinal sliding hole.

[0035] The lower end of the longitudinal support block 11 is threaded with a fixing knob 3, and the end of the fixing knob 3 abuts against the longitudinal rod 10.

[0036] One end of the longitudinal moving rod 10 is fixedly connected to the vertical moving support block 13, and the vacuum tube 4 is slidably set on the vertical moving support block 13 through the vertical moving rod 14.

[0037] The vertical support block 13 has a vertical sliding hole, and the vertical rod 14 is slidably disposed in the vertical sliding hole.

[0038] The vertical moving rod 14 is provided with a threaded section, and two fixing nuts 8 are connected in parallel on the threaded section. The two fixing nuts 8 are located on the upper and lower sides of the vertical moving support block 13 and abut against the vertical moving support block 13.

[0039] The upper surface of the longitudinal support block 11 is fixed to the frame 2 by the support frame 12.

[0040] The vacuum tube 4 has a suction channel in the area between the two suction plates 6. Fixing plates 5 are fixed to the outer walls of the upper and lower edges of the vacuum tube 4 in the suction channel, and the two suction plates 6 are fixed to the two fixing plates 5 respectively.

[0041] Side blocking plates are fixed between the opposite ends of the two suction plates 6.

[0042] The suction plate 6 is a rubber plate.

[0043] One end of the vacuum tube 4 is sealed, and the other end is connected to a negative pressure device through a pipe. The pipe is equipped with a separate regulating valve, which can be adjusted individually according to the dehydration status of each layer during lamination, avoiding problems such as low fiber binding moisture and decreased interlayer bonding due to excessive vacuum suction.

[0044] The working principle of this device is as follows:

[0045] The design of the suction soft plate 6 and the fixed plate 5 is as follows: Two suction soft plates 6 are fixed by two upper and lower fixed plates 5 to form an adjustable flexible sealing interface. A rigid support plate is used between the two suction soft plates 6 to avoid large deformation due to vacuum suction. When the lower end of the rubber plate contacts the blanket 9, it adapts to the surface of the blanket 9 by its own elasticity, which solves the sealing failure problem caused by the tension fluctuation of the blanket 9 in traditional rigid scrapers.

[0046] Extrusion-suction synergistic dewatering: A flat roller 1 is set in the composite extrusion zone of the circular wire mesh cage 7 and the blanket 9 to achieve synchronous application of mechanical extrusion force, and a vacuum tube 4 is set to achieve vacuum suction force, which improves the moisture removal rate of the slurry layer. Compared with single extrusion dewatering, the efficiency is improved. The vacuum negative pressure intensity is dynamically adjusted according to the weight and speed of the machine.

[0047] By adjusting the vacuum tube 4 longitudinally and vertically, the angle can be adaptively adjusted to adjust the contact point between the rubber plate and the blanket 9, thus adapting to the dewatering requirements of different eccentricities of the roller 1.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A vacuum dewatering device for a round screen lap ply compounding station, characterized by: The device includes a rotating circular mesh cage (7), a blanket (9) that moves and adheres to the top of the circular mesh cage (7), a roller (1) that rotates and adheres to the blanket (9), a vacuum tube (4) that slides longitudinally on one side of the roller (1) and is arranged in parallel with the circular mesh cage (7), two suction soft plates (6) that are fixed in parallel on the outer wall of the vacuum tube (4), the lower ends of the two suction soft plates (6) that rub against the upper surface of the blanket (9), the area between the two suction soft plates (6) that communicates with the inner cavity of the vacuum tube (4), and the height of the vacuum tube (4) can also be adjusted vertically.

2. A vacuum dewatering device suitable for use in a round screen lapper compound application according to claim 1, characterized in that: Several rigid support plates are fixedly connected side by side between the two suction soft plates (6) along the axial direction of the circular mesh cage (7).

3. A vacuum dewatering device suitable for use in a rounder pulp composite application according to claim 2, characterized in that: Two longitudinal support blocks (11) are fixedly arranged side by side on the frame (2), and the two ends of the vacuum tube (4) are slidably set on the longitudinal support blocks (11) by longitudinal rods (10).

4. A vacuum dewatering device suitable for use in a rounder pulp composite application according to claim 3, characterized in that: The longitudinal support block (11) has a longitudinal sliding hole horizontally opened along the longitudinal direction, and the longitudinal rod (10) is slidably disposed in the longitudinal sliding hole.

5. A vacuum dewatering device suitable for use in a rounder pulp composite application according to claim 4, characterized in that: The lower end of the longitudinal support block (11) is threaded with a fixing knob (3), and the end of the fixing knob (3) abuts against the longitudinal rod (10).

6. A vacuum dewatering device suitable for use in a rounder pulp composite application according to claim 5, characterized in that: One end of the longitudinal moving rod (10) is fixed to a vertical moving support block (13), and the vacuum tube (4) is slidably mounted on the vertical moving support block (13) via the vertical moving rod (14).

7. A vacuum dewatering device suitable for use in a rounder pulp composite application according to claim 6, characterized in that: The vertical support block (13) has a vertical sliding hole, and the vertical rod (14) is slidably disposed in the vertical sliding hole.

8. The vacuum dewatering device for composite processing of circular wire mesh cage slurry according to claim 7, characterized in that: The vertical moving rod (14) is provided with a threaded section, and a fixing nut (8) is connected to the threaded section in parallel. The two fixing nuts (8) are located on the upper and lower sides of the vertical moving support block (13) and abut against the vertical moving support block (13).

9. A vacuum dewatering device suitable for use in a rounder pulp composite application according to claim 8, characterized in that: The vacuum tube (4) has a suction channel in the area between the two suction soft plates (6). The vacuum tube (4) has a fixing plate (5) fixed on the outer wall of the upper and lower edges of the suction channel. The two suction soft plates (6) are fixed on the two fixing plates (5) respectively.

10. The vacuum dewatering device for composite processing of circular wire mesh cage slurry according to claim 9, characterized in that: The suction plate (6) is a rubber plate.

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