Automatic paper guiding device of high-speed paper machine

Abstract

The utility model discloses a high-speed paper machine automatic paper guiding device which comprises a base and an automatic paper guiding device body arranged on the base, the automatic paper guiding device body comprises a shell structure and a paper guiding mechanism arranged on the shell structure, the front end and the rear end of the shell structure are connected with a side opening door in a hinged mode, and the paper guiding mechanism is arranged on the shell structure. A paper injection conveying inlet and a paper injection conveying outlet are formed in the two sides of the shell structure, the paper injection mechanism comprises a conveying roller arranged in the horizontal direction of the automatic paper injection device, a forming plate is arranged on the conveying roller, and a first press roller and a second press roller are arranged in the conveying direction of the conveying roller. The first press roll and the second press roll are provided with independent first drying cylinder units, a second drying cylinder unit is arranged on one side of the second press roll, and the first press roll is arranged at the input end of the automatic paper injection device.

Description

Technical Field

[0001] The utility model belongs to the technical field of papermaking, and in particular relates to an automatic paper threading device for a high-speed paper machine. Background Art

[0002] Traditionally, papermaking machines have relied on manual threading, which is labor-intensive, slow, and expensive, posing safety risks. To address these existing issues, rope-based and ropeless threading methods have emerged. Rope-based threading is generally used on medium- and low-speed paper machines, but it can be prone to rope detachment and severe wear during operation. This can also lead to web breaks due to speed differences. In high-speed paper machines, the paper sheet transfer from the press section to the dryer section and then to the reel section has a very high breakage rate. Long-term use of the rope can easily damage the paper machine, leading to unplanned downtime. This prolonged threading process obscures the machine's efficiency potential, and significant thread breakage increases costs and energy consumption.

[0003] Ropeless threading is currently widely used and can even be used for threading in high-speed paper machines. However, existing ropeless threading methods are prone to paper breakage during the threading process, which can prevent smooth paper flow and lead to blockage. Furthermore, the low tension between the upper and lower drying cylinders, due to the open distance, is not conducive to paper threading.

[0004] In view of the above factors, a special automatic paper threading device for high-speed paper machines is designed. The paper enters the drying cylinder twice, and the wet paper web enters the drying section from the pressing section, which prevents the paper from sagging, reduces the number of paper breaks, improves the yield rate and improves work efficiency. Utility Model Content

[0005] The purpose of the present utility model is to provide an automatic paper threading device for a high-speed paper machine to solve the problems raised in the above background technology.

[0006] The purpose of the utility model is achieved through the following technical solutions: an automatic paper feeding device for a high-speed paper machine, comprising a base and an automatic paper feeding device arranged on the base, the automatic paper feeding device comprising a shell structure and a paper feeding mechanism arranged on the shell structure;

[0007] The front and rear ends of the shell structure are connected to the side door in a hinged manner, and a paper feeding inlet and a paper feeding outlet are provided on both sides of the shell structure.

[0008] Furthermore, the paper feeding mechanism includes a conveying roller arranged along the horizontal direction of the automatic paper feeding device, a forming plate is provided on the conveying roller, and a first pressing roller and a second pressing roller are provided along the transmission direction of the conveying roller;

[0009] The first pressing roll and the second pressing roll are provided with independent first drying cylinder units, and a second drying cylinder unit is provided on one side of the second pressing roll.

[0010] Furthermore, the first pressing rollers are provided in a group and are located at the input end of the automatic paper threading device;

[0011] The second pressing rollers are provided in two groups and are located at the rear end of the independent first drying cylinder unit.

[0012] Furthermore, the first drying cylinder unit includes two drying cylinders, and the forming plate that carries the paper web bypasses one of the drying cylinders, transfers the paper sheet to the other drying cylinder, and then enters the pressing area again.

[0013] Furthermore, the second drying cylinder unit adopts a double-row drying cylinder structure, the double-row drying cylinders are staggered, and a dryer net vacuum box is provided on the double-row drying cylinders.

[0014] Furthermore, the second drying cylinder unit is provided with a scraper device, and auxiliary blowing pipes are installed above and below the scraper device.

[0015] Furthermore, the scraper device includes a scraper frame and a scraper blade detachably connected to the scraper frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The utility model has a simple structure and can effectively ensure paper guiding while reducing the complexity of the paper guiding structure.

[0018] The utility model realizes automatic paper threading when the paper sheet is introduced from the nip formed by one drying cylinder and the dryer fabric into the nip formed by the next drying cylinder and the dryer fabric. In order to ensure smooth paper threading, the utility model installs a corresponding dryer fabric vacuum box above the drying cylinder guide roller and arranges a blowing pipe at the same time to ensure trouble-free paper threading.

[0019] The utility model installs auxiliary blowing pipes above and below the scraper frame. The blowing pipes are installed to prevent the upper paper strip from loosening and to promptly blow up the paper strip, thereby preventing paper breakage during the paper threading process and ensuring a smooth paper passage without blockage. At the same time, the blowing pipes can ensure that the paper sheet is properly increased in tension when passing the paper sheet within the open distance between the upper and lower drying cylinders, which will facilitate paper threading. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of the automatic paper threading device of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the automatic paper threading device of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the paper guiding mechanism of the utility model;

[0023] Figure 4 This is a schematic diagram of the arrangement of the dryer fabric vacuum box of the utility model;

[0024] Figure 5 This is a schematic diagram of the position of the dryer fabric vacuum box and scraper device of the utility model;

[0025] Figure 6 This is a schematic diagram of the scraper device of the utility model;

[0026] Figure 7 This is a schematic diagram of the connection between the scraper device and the blowing pipe of the utility model. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] like Figure 1-7 As shown, an automatic paper threading device for a high-speed paper machine includes a base 1 and an automatic paper threading device 2 arranged on the base 1, the automatic paper threading device 2 includes a shell structure and a paper threading mechanism 4 arranged on the shell structure 2-1;

[0029] The front and rear ends of the shell structure are connected to the side door 3 in a hinged manner, and a paper feeding inlet and a paper feeding outlet are provided on both sides of the shell structure.

[0030] The utility model provides that the paper enters the drying cylinder twice, and the wet paper web enters the drying section from the pressing section, thereby preventing the paper sheets from sagging, reducing the number of paper breaks, improving the yield rate and improving the working effect.

[0031] In order to facilitate the rapid implementation of the paper threading operation in the use state and effectively eliminate the critical traction force between the pressing section and the drying section, the paper threading mechanism 4 includes a conveying roller 4-1 arranged in the horizontal direction of the automatic paper threading device 2, a forming plate is provided on the conveying roller 4-1, and a first pressing roller 4-2 and a second pressing roller 4-3 are arranged along the transmission direction of the conveying roller 4-1;

[0032] The first pressing roll 4-2 and the second pressing roll 4-3 are provided with independent first drying cylinder units 4-4, and a second drying cylinder unit 4-5 is provided on one side of the second pressing roll 4-3.

[0033] The first pressing rollers 4-2 are provided in a group and are located at the input end of the automatic paper threading device 2;

[0034] The second pressing rollers 4-3 are provided in two groups and are located at the rear end of the independent first drying cylinder unit 4-4.

[0035] In order to reduce the tension of the paper before it enters the second drying cylinder unit 4-5 during use, the first drying cylinder unit 4-4 includes two drying cylinders. The forming plate that supports the paper web bypasses one of the drying cylinders and transfers the paper sheet to the other drying cylinder before entering the pressing area again.

[0036] The second drying cylinder unit 4-5 adopts a double-row drying cylinder structure, the double-row drying cylinders are staggered, and a dryer vacuum box is provided on the double-row drying cylinders.

[0037] In order to ensure smooth passage of paper sheets without blockage during use and to appropriately increase the tension of the paper, a scraper device 6 is provided on the second drying cylinder unit 4-5, and auxiliary blowing pipes 7 are installed above and below the scraper device 6.

[0038] The blowing pipe 7 is connected to an external blowing device, wherein one side of the blowing pipe 7 is arranged toward the open distance position between the upper and lower drying cylinders; the other side of the blowing pipe 7 is arranged toward the upper and lower drying cylinders.

[0039] Auxiliary blowing pipes are installed above and below the scraper device 6 to prevent the upper paper strip from loosening and to blow it up in time to prevent paper breakage during the paper feeding process.

[0040] In a double-row drying group, when the paper sheets are transferred in the open distance between the upper and lower drying cylinders, appropriately increasing the paper tension will help to guide the paper.

[0041] In order to facilitate disassembly and replacement during use, the scraper device 6 includes a scraper frame 6-1 and a scraper blade 6-2 detachably connected to the scraper frame. The scraper frame 6-1 is detachably connected to the blade holder 6-3.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0043] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An automatic paper threading device for a high-speed paper machine, comprising a base (1) and an automatic paper threading device (2) arranged on the base (1), characterized in that: The automatic paper feeding device (2) comprises a shell structure and a paper feeding mechanism (4) arranged on the shell structure; The front and rear ends of the shell structure are connected to the side door (3) in a hinged manner, and a paper feeding inlet and a paper feeding outlet are provided on both sides of the shell structure.

2. The automatic paper threading device for a high-speed paper machine according to claim 1, characterized in that: The paper feeding mechanism (4) comprises a conveying roller (4-1) arranged in the horizontal direction along the automatic paper feeding device (2); a forming plate is provided on the conveying roller (4-1); and a first pressing roller (4-2) and a second pressing roller (4-3) are provided along the transmission direction of the conveying roller (4-1); The first pressing roller (4-2) and the second pressing roller (4-3) are provided with independent first drying cylinder units (4-4), and a second drying cylinder unit (4-5) is provided on one side of the second pressing roller (4-3).

3. The automatic paper threading device for a high-speed paper machine according to claim 2, characterized in that: The first pressing rollers (4-2) are provided in a group and are located at the input end of the automatic paper threading device (2); The second pressing rollers (4-3) are provided in two groups and are located at the rear end of the independent first drying cylinder unit (4-4).

4. The automatic paper threading device for a high-speed paper machine according to claim 3, characterized in that: The first drying cylinder unit (4-4) includes two drying cylinders. The forming plate that carries the paper web bypasses one of the drying cylinders and transfers the paper sheet to the other drying cylinder before entering the pressing zone again.

5. The automatic paper threading device for a high-speed paper machine according to claim 4, characterized in that: The second drying cylinder unit (4-5) adopts a double-row drying cylinder structure, the double-row drying cylinders are arranged in a staggered manner, and a dryer net vacuum box (5) is provided on the double-row drying cylinders.

6. The automatic paper threading device for a high-speed paper machine according to claim 5, characterized in that: The second drying cylinder unit (4-5) is provided with a scraper device (6), and auxiliary blowing pipes are installed above and below the scraper device (6).

7. The automatic paper threading device for a high-speed paper machine according to claim 6, characterized in that: The scraper device (6) comprises a scraper frame (6-1) and a scraper blade (6-2) detachably connected to the scraper frame (6-1); The scraper frame (6-1) is connected to the blade seat (6-3) in a detachable manner.

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