Single-layer quantifying device for increasing high-density insulating cardboard
By setting a cleaning mechanism and air knife on the papermaking wire cage, the wire cage can be cleaned and dried quickly, which solves the problem of insufficient basis weight of a single layer in the manufacturing process of high-density insulating paperboard, improves the quality of the paperboard and reduces the risk of cracking.
Patent Information
- Application Number
- CN202422665665.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-11-01
AI Technical Summary
In the existing technology, it is difficult to reduce the risk of interlayer cracking by increasing the basis weight of a single layer during the manufacturing process of high-density insulating paperboard. Moreover, the interlayer adhesion decreases as the number of paperboard layers increases, which leads to an increased risk of cracking.
A device for increasing the basis weight of a single layer of high-density insulating paperboard is designed. By setting a cleaning mechanism and an air knife on the papermaking wire cage, the wire cage can be quickly cleaned and dried, improving the dryness of the wire cage and thus increasing the basis weight of the single layer.
It effectively increases the basis weight of a single layer by 20-30%, reduces the risk of interlayer cracking in paperboard, and improves the quality of paperboard.
Smart Images
Figure CN223688696U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to transformer insulating paper board technical field, concretely relates to a kind of increase high-density insulating paper board single layer ration device. BACKGROUND
[0002] High-density insulating paper board is needed in the inside of super, extra-high voltage oil-immersed transformer, and with the increase of voltage grade, the thickness requirement of paper board is gradually improved. The thickness of paper board in the papermaking process is limited by the water permeability of net cage, and can only be realized by increasing the number of layers. The more layers in the paper board, the lower the interlayer adhesion, and the higher the risk of cracking. Therefore, there is always a risk of interlayer cracking for paper board >3mm.
[0003] High-density paper board for transformer is in the field of papermaking, and the basic principle is to rotate the low-quantity wet paper blank in the circumferential direction of the forming cylinder to a specified thickness, and then cut off the closed annular paper blank through the cutting device of the forming cylinder to develop a flat paper board. The low-quantity wet paper blank is made by using the sizing system, net cage and wool cloth, and vacuum mechanism. The single layer ration is an index of the adsorption capacity of the net cage. The greater the adsorption capacity of the net cage, the higher the papermaking performance. Generally, our net cage is composed of stainless steel net cage body + surface adsorption net. Affected by fiber length and concentration, the mesh number of adsorption net is relatively fixed, and it is difficult to adjust the single layer ration by adjusting the mesh number of adsorption net. If the single layer ration is forcibly increased by increasing the sizing amount, the sizing line often encounters the problem of insufficient water permeability of pulp solution. SUMMARY
[0004] To solve the above problems and technical needs, the utility model provides a kind of increase high-density insulating paper board single layer ration device, and the device can quickly clean and dry the net cage after papermaking, so that the net cage remains dry before the next sizing, thereby increasing the papermaking amount of net cage and effectively improving the single layer ration of paper board.
[0005] The utility model discloses a technical scheme as follows: a single-layer quantitative device for increasing high-density insulating paperboard, which comprises a papermaking wire cage, a forming cylinder and a pulp conveying mechanism, the pulp conveying mechanism comprises a plurality of conveying rollers and a pulp suction conveying belt, the pulp suction conveying belt is wound around the plurality of conveying rollers, and the conveying rollers drive the pulp suction conveying belt to rotate cyclically; the papermaking wire cage and the forming cylinder are arranged on the two sides of the pulp suction conveying belt respectively, one side of the papermaking wire cage is provided with a pulp injection port, the pulp injection port sprays pulp to the surface of the papermaking wire cage, the pulp suction conveying belt is attached to the outer surface of the papermaking wire cage, with the relative rolling of the papermaking wire cage and the pulp suction conveying belt, the pulp attached to the surface of the papermaking wire cage is adsorbed by the pulp suction conveying belt, and the pulp suction conveying belt conveys the pulp with uniform thickness to the outside of the forming cylinder; with the rotation of the forming cylinder, the pulp is repeatedly wound outside the forming cylinder to form a multi-layer pulp structure.
[0006] Further, the papermaking wire cage is provided with a wire cage cleaning mechanism outside, the wire cage cleaning mechanism comprises a rinsing water tank and a side cleaning nozzle, the papermaking wire cage is horizontally arranged, the bottom of the papermaking wire cage is immersed in the rinsing water tank, and the side cleaning nozzle is arranged behind the rotation of the contact point between the papermaking wire cage and the pulp suction conveying belt; the side cleaning nozzle sprays water to clean the surface of the papermaking wire cage from which the pulp is sucked away.
[0007] Further, the side wall of the rinsing water tank is inclined upward, and the water sprayed by the side cleaning nozzle flows into the rinsing water tank after washing the papermaking wire cage.
[0008] Further, a wind knife is arranged between the rinsing water tank and the pulp injection port, the knife edge of the wind knife is opposite to the outside of the papermaking wire cage, the length of the knife edge of the wind knife covers the length of the papermaking wire cage, and the wind knife blows away the residual moisture on the papermaking wire cage.
[0009] Further, the pulp suction conveying belt is a papermaking felt.
[0010] The utility model has the advantages that the device can improve the single-layer quantitative of papermaking by improving the dryness of the papermaking wire cage and the adsorption net before pulp injection. During the wire cage papermaking process, a part of short fibers will be left on the papermaking wire cage after the papermaking felt adsorbs the pulp on the wire cage, and if the short fibers enter the next papermaking cycle, the pulp layer will be thick, and the pulp adsorption amount of the papermaking wire cage will be affected. Therefore, the wire cage cleaning mechanism is arranged to clean the residual short fibers by spraying and rinsing in sequence. After cleaning, the adsorption net on the wire cage still has about 30% of the cleaning water left, and the moist net surface will affect the papermaking amount of the next cycle. Therefore, a high-speed wind knife is arranged between the rinsing water tank and the pulp injection port to continuously dry the surface of the wire cage turned out of the rinsing water tank, so that the single-layer quantitative of papermaking is improved. The device can effectively improve the single-layer quantitative by 20-30%, the number of paperboard paper sheets with the same thickness is reduced, and the cracking risk is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 The structure diagram of the single-layer quantitative device of the high-density insulating paperboard is added to the utility model;
[0012] In the figure, the marks are: a papermaking wire mesh cage 1, a forming cylinder 2, a paper pulp conveying mechanism 3, a conveying roller 31, a pulp suction conveying belt 32, a pulp injection port 4, a wire mesh cage cleaning mechanism 5, a side cleaning nozzle 51, a rinsing water tank 52, an air knife 6 and paper pulp 7. DETAILED DESCRIPTION
[0013] The utility model will be further described below in combination with the drawings and examples.
[0014] As Figure 1 The structure diagram of the single-layer quantitative device of the high-density insulating paperboard is added to the utility model, which comprises a papermaking wire mesh cage 1, a forming cylinder 2 and a paper pulp conveying mechanism 3. The paper pulp conveying mechanism 3 comprises a plurality of conveying rollers 31 and a pulp suction conveying belt 32. The pulp suction conveying belt 32 is wound around the plurality of conveying rollers 31. The conveying rollers 31 drive the pulp suction conveying belt 32 to rotate circularly. The papermaking wire mesh cage 1 and the forming cylinder 2 are respectively arranged on the two sides of the pulp suction conveying belt 32. The papermaking wire mesh cage 1 is provided with a pulp injection port 4 on one side. The pulp injection port 4 sprays the paper pulp to the surface of the papermaking wire mesh cage 1. The pulp suction conveying belt 32 is closely attached to the outer surface of the papermaking wire mesh cage 1. With the relative rolling of the papermaking wire mesh cage 1 and the pulp suction conveying belt 32, the paper pulp adhered to the surface of the papermaking wire mesh cage 1 is adsorbed by the pulp suction conveying belt 32. The pulp suction conveying belt 32 conveys the paper pulp with uniform thickness to the outside of the forming cylinder 2. With the rotation of the forming cylinder 2, the paper pulp 7 is repeatedly wound outside the forming cylinder to form a multi-layer paper pulp structure. The above-mentioned pulp suction conveying belt 32 is a papermaking felt. The papermaking felt can remove the water in the wet paper pulp, so that the paper pulp is formed.
[0015] In order to be more beneficial to the papermaking of the next cycle, the outside of the papermaking wire mesh cage 1 is provided with a wire mesh cage cleaning mechanism 5. The wire mesh cage cleaning mechanism 5 comprises a rinsing water tank 52 and a side cleaning nozzle 51. The papermaking wire mesh cage 1 is horizontally arranged. The bottom of the papermaking wire mesh cage 1 is immersed in the rinsing water tank 52. The side cleaning nozzle 51 is arranged behind the rotation of the contact point of the papermaking wire mesh cage 1 and the pulp suction conveying belt 32. The side cleaning nozzle 51 sprays water to clean the surface of the papermaking wire mesh cage 1 from which the paper pulp is sucked away. The side wall of the rinsing water tank 52 is obliquely upwardly developed. The water sprayed by the side cleaning nozzle 51 flows into the rinsing water tank 52 after washing the papermaking wire mesh cage 1.
[0016] The purpose of arranging the wire mesh cage cleaning mechanism 5 is to flush away the short fibers remaining on the wire mesh cage which are not adsorbed by the felt. However, about 30% of the cleaning water in the adsorption net on the wire mesh cage is still not completely drained in this process, which affects the papermaking amount of the next cycle.
[0017] The degree of dryness of the papermaking net cylinder 1 between the lifting and spraying can increase the papermaking amount of the net cylinder, so as to increase the single-layer basis weight of the paper. To this end, a specific scheme is that a wind knife 6 is arranged between the rinsing water tank 52 and the spraying port 4, the cutting edge of the wind knife 6 is opposite to the outer side of the papermaking net cylinder 1, the length of the cutting edge of the wind knife 6 covers the length of the papermaking net cylinder, and the wind knife 6 blows away the residual water on the papermaking net cylinder. The wind knife 6 can blow away 30% of the residual cleaning water on the papermaking net cylinder by high-speed wind pressure, so as to increase the single-layer basis weight of the paper. Through the device, the single-layer basis weight can be effectively increased by 20-30%, the number of paper sheets with the same thickness is reduced, and the cracking risk is reduced.
[0018] The action principle of the utility model discloses: the papermaking net cylinder 1 rotates counterclockwise, the spraying port 4 sprays paper pulp to the papermaking net cylinder 1 surface, and the dry papermaking net cylinder 1 surface can absorb more paper pulp, so as to increase the thickness and weight of single-layer paper pulp;The papermaking net cylinder 1 and the suction pulp conveyor belt 32 relatively rotate, the suction pulp conveyor belt 32 is laid to the suction pulp conveyor belt 32 surface on the papermaking net cylinder 1, and the suction pulp conveyor belt 32 is transmitted to the outside of the forming cylinder 2 along with the rotation of the transmission roller 31, and the forming cylinder 2 rotates clockwise and rolls material, and the paper pulp 7 is repeatedly wound outside the forming cylinder and forms a multi-layer paper pulp structure;After the paper pulp on the papermaking net cylinder 1 is sucked, the part of papermaking net cylinder 1 rotates through the side cleaning nozzle 51, and the side cleaning nozzle 51 sprays water to clean the papermaking net cylinder 1, and the papermaking net cylinder 1 is further cleaned through the bottom rinsing water tank 52, and the papermaking net cylinder 1 is blown by the wind knife 6, and the high-pressure air of the wind knife 6 blows the residual water on the papermaking net cylinder 1, so that the papermaking net cylinder 1 returns to the dry state, and the dry papermaking net cylinder 1 is again through the spraying port 4, and the paper pulp is adsorbed and fed, and enters the next cycle.
[0019] The above only describes several preferred embodiments of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of changes and replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be the protection scope of the claims.
Claims
1. An increase in high density insulation paper board single layer dosing device characterized by: The application relates to a papermaking machine comprising a papermaking wire cage, a forming cylinder and a pulp conveying mechanism, wherein the pulp conveying mechanism comprises a plurality of conveying rollers and a pulp suction conveying belt, the pulp suction conveying belt is wound around the plurality of conveying rollers, the conveying rollers drive the pulp suction conveying belt to rotate circularly, the papermaking wire cage and the forming cylinder are arranged on the two sides of the pulp suction conveying belt respectively, a pulp injection port is arranged on one side of the papermaking wire cage, the pulp injection port sprays pulp to the surface of the papermaking wire cage, the pulp suction conveying belt is tightly attached to the outer surface of the papermaking wire cage, with the relative rolling of the papermaking wire cage and the pulp suction conveying belt, the pulp adhered to the surface of the papermaking wire cage is adsorbed by the pulp suction conveying belt, the pulp suction conveying belt conveys the pulp with uniform thickness to the outside of the forming cylinder, with the rotation of the forming cylinder, the pulp is repeatedly wound outside the forming cylinder to form a multilayer pulp structure.
2. The apparatus for singulating a single layer of high density insulation board according to claim 1, wherein: The papermaking wire cage is provided with a wire cage cleaning mechanism, the wire cage cleaning mechanism comprises a rinsing water tank and a side cleaning nozzle, the papermaking wire cage is horizontally arranged, the bottom of the papermaking wire cage is immersed in the rinsing water tank, the side cleaning nozzle is arranged behind the rotation of the contact point of the papermaking wire cage and the pulp suction conveying belt, the side cleaning nozzle sprays water to clean the surface of the papermaking wire cage from which the pulp is sucked.
3. The device for increasing the basis weight of a single layer of high-density insulating paperboard according to claim 2, characterized in that: The side wall of the rinsing water tank is upwardly expanded, the water sprayed by the side cleaning nozzle flows into the rinsing water tank after washing the papermaking wire cage.
4. The apparatus of claim 3, wherein: The rinsing water tank and the pulp injection port are provided with an air knife, the cutting edge of the air knife is opposite to the outside of the papermaking wire cage, the length of the cutting edge of the air knife covers the length of the papermaking wire cage, and the air knife blows away the residual water on the papermaking wire cage.
5. The apparatus of claim 4, wherein: the first and second conveyors are each a single layer of high density paperboard. The pulp suction conveying belt is a papermaking felt.