Single-hanging-to-reverse-single-hanging structure of drying part

Abstract

The utility model provides a single-hanging-to-reverse-single-hanging structure of a drying part. The single-hanging-to-reverse-single-hanging structure comprises a front drying cylinder set, a rear drying cylinder set and a transfer roller set arranged between the front drying cylinder set and the rear drying The transfer roller set comprises a second rack, a first air roller and a second air roller, wherein the first air roller and the second air roller are rotationally arranged on the second rack, and the outer surfaces adsorb paper webs through negative pressure. A first dry net is arranged to bypass the front drying cylinder group and the first air roller, and a second dry net is arranged to bypass the rear drying cylinder group and the second air roller; the first dry net and the second dry net clamp the paper web from two sides; and the position of at least one of the first air roller and the second air roller relative to the rack is adjustable. In the front and back conversion process of the paper web, the paper web is stably fixed all the time. The positions of the first air roller and the second air roller are adjustable, so that the tensioning degree of the first dry net and the second dry net and the pressure between the two dry nets are adjusted, and the clamping force of the paper web is adjusted.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the paper web drying field, concretely relates to a drying part single hanging turn over single hanging structure. BACKGROUND

[0002] With the development of society, the market demand for the types of paper products is more and more rich, and paper manufacturers need to produce different types of paper products according to different paper orders, so the papermaking equipment is more and more non-standard. The drying part structure of the present application is for a special paper type, and the drying part of the present application needs to contact the two surfaces of the paper web with the surface of the drying cylinder respectively to achieve excellent paper surface performance. In the process of passing between the upper and lower drying cylinders, the paper web runs stably when there is a dry net support, such as the structure of the drying part of the high-speed paper machine of patent CN203229831U. However, in the process of converting the front and back surfaces, the paper web is in a suspended state, floating and uncertain, and part of the paper web is also in a suspended state in the process of running between the upper and lower drying cylinders in the subsequent running process. In the paper leading process, the paper edge cannot be accurately transferred from the previous cylinder group to the next cylinder group, which needs to waste a lot of time. In the normal production process, the paper web is in a suspended state in the process of converting the front and back surfaces between the two drying cylinder groups, floating and uncertain, which is easy to break the paper, and the frequency of paper breaking is higher with the increase of the speed of the paper machine. In the later cylinder group, the paper web is also in a suspended state and floating and uncertain in the process of passing between the upper and lower drying cylinders without dry net support, which is easy to break the paper and affects the production efficiency. SUMMARY

[0003] The utility model provides a drying part single hanging turn over single hanging structure.

[0004] The utility model discloses a drying part single hanging turn over single hanging structure, including the drying of paper web's one side's front drying cylinder group and the drying of paper web's other side's rear drying cylinder group, be provided with transfer roller group between front drying cylinder group and rear drying cylinder group, transfer roller group includes second machine frame and the first wind roller and the second wind roller that rotate setting in second machine frame, and the outer surface is through negative pressure adsorption paper web, set up first dry net and pass through front drying cylinder group and the first wind roller close to front drying cylinder group, set up second dry net and pass through rear drying cylinder group and the second wind roller close to rear drying cylinder group, first dry net and second dry net are clamped from both sides to paper web, at least one of first wind roller and second wind roller is adjustable with the position of machine frame.

[0005] The second machine frame is rotatably provided with a loading arm close to the rear drying cylinder group; the upper end of the loading arm is rotatably provided with the second wind roller; the lower end of the loading arm and the second machine frame are rotatably provided with a first driving mechanism for driving the loading arm to rotate.

[0006] The front dryer group comprises a plurality of ordinary dryers arranged on the upper row and a plurality of cylinder face punching dryers arranged on the lower row and staggered with the ordinary dryers; the first air roller is arranged below the right of the ordinary dryer at the right end of the front dryer group; a dry net guide roller is arranged above the first air roller.

[0007] The rear dryer group comprises a plurality of cylinder face punching dryers arranged on the upper row and a plurality of ordinary dryers arranged on the lower row and staggered with the cylinder face punching dryers; the second air roller is arranged above the left of the ordinary dryer at the left end of the rear dryer group; a dry net guide roller is arranged below the second air roller; the second air roller is arranged above the right of the first air roller.

[0008] The outer surfaces of the first air roller and the second air roller are respectively provided with air holes in communication with the respective inner cavities and the outer fan, and the outer fan is used to form negative pressure on the outer surfaces.

[0009] Compared with the prior art, the utility model sets the transfer roller group between the front dryer group and the rear dryer group, and the paper web is transferred through the first dry net and the second dry net in contact, and the paper web is always fixed stably during the front and back surface conversion, so that the problem of the paper web in suspension and floating is avoided, the positions of the first air roller and the second air roller are adjustable, so that the tension degree of the first dry net and the second dry net and the pressure between the two dry nets are adjusted, and the clamping force of the paper web is adjusted; it is also convenient to install and dismount the first dry net and the second dry net. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a general schematic diagram of the single hanging and reverse single hanging structure of the drying part.

[0011] Figure 2 It is Figure 1 The schematic diagram of the front dryer group in the middle.

[0012] Figure 3 It is Figure 1 The schematic diagram of the transfer roller group in the middle.

[0013] Figure 4 It is Figure 1 The schematic diagram of the rear dryer group in the middle.

[0014] Figure 5 It is the schematic diagram of the first dry net.

[0015] Figure 6 It is the schematic diagram of the second dry net.

[0016] Figure 7 It is the schematic diagram of the paper web of the single hanging and reverse single hanging structure of the drying part.

[0017] Figure 8It is a dry part single hanging turn reverse single hanging structure stable paper web schematic diagram.

[0018] Wherein, 1 first drying cylinder group, 2 transfer roller group, 3 rear drying cylinder group, 4 first rack, 5 ordinary drying cylinder, 6 cylinder face punching drying cylinder, 7 dry net guide roller, 8 paper web stabilizer, 9 first dry net, 10 second rack, 11 loading arm, 12 connecting pin shaft, 13 first air roller, 14 second air roller, 15 loading hydraulic cylinder, 16 first pin shaft, 17 second pin shaft, 18 is second dry net. DETAILED DESCRIPTION

[0019] In the present application, unless otherwise explicitly specified and limited, the technical terms used in the present application should be understood as the usual meaning understood by the skilled person described in the present application. The terms "connected", "connected", "fixed", "provided" and the like should be broadly understood, which can be fixedly connected, or can be detachably connected, or can be integrated; it can be directly connected, or indirectly connected through an intermediate medium; it can be mechanically connected, or electrically connected. Unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can be directly in contact with the first and second features, or indirectly in contact through an intermediate medium. Moreover, the first feature "above" or "above" or "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below" or "below" or "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature. Relationship terms such as first, second and the like are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. The terms used in the description, such as "center", "transverse", "longitudinal", "length", "width", "thickness", "height", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "clockwise", "counterclockwise", etc. The orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation.

[0020] The technical scheme of the present application will be described clearly and completely in combination with the drawings and specific embodiments. As Figures 1-8As shown, a drying section single hanging rotating reverse single hanging structure, including a front drying cylinder group 1 for drying one side of the paper web and a rear drying cylinder group 3 for drying the other side of the paper web; a transfer roller group 2 is arranged between the front drying cylinder group 1 and the rear drying cylinder group 3; the transfer roller group 2 includes a second rack 10, a first air roller 13 and a second air roller 14 rotatably arranged on the second rack 10 and the outer surfaces of which adsorb the paper web through negative pressure; a first dry net 9 is arranged to pass through the front drying cylinder group 1 and the first air roller 13 close to the front drying cylinder group 1, and a second dry net 18 is arranged to pass through the rear drying cylinder group 3 and the second air roller 14 close to the rear drying cylinder group 3; the first dry net 9 and the second dry net 18 clamp the paper web from both sides; at least one of the first air roller 13 and the second air roller 14 is adjustable with the position of the rack. The structure of the front drying cylinder group 1 and the rear drying cylinder group 3 belongs to the prior art, generally including two layers, one layer is arranged to dry the paper web by drying cylinder, and the other layer is arranged to adsorb the paper web by vacuum cylinder connected with air pipe or vacuum roller connected with air pipe; the drying cylinder and the vacuum cylinder are arranged alternately, the dry net is arranged in multiple S shapes between the drying cylinder and the vacuum cylinder, and at least one of the drying cylinder and the vacuum roller is driven by a driving mechanism to rotate, thereby driving the dry net and other drying cylinders and vacuum cylinders to rotate. The utility model sets the transfer roller group 2 between the front drying cylinder group 1 and the rear drying cylinder group 3, and transfers the paper web through the first dry net 9 and the second dry net 18 in contact, and the paper web is always fixed stably during the conversion of the front and back surfaces, avoiding the problem that the paper web is in suspension and floating. The positions of the first air roller 13 and the second air roller 14 are adjustable, thereby adjusting the tension of the first dry net 9 and the second dry net 18 and the pressure between the two dry nets, and adjusting the clamping force of the paper web; it is also convenient to install and dismount the first dry net 9 and the second dry net 18. There are various ways of position adjustment, such as sliding any one of the first air roller 13 or the second air roller 14 on the rack, or swinging any one of the first air roller 13 or the second air roller 14 on the rack through other parts, which are all within the protection scope of the utility model.

[0021] The second rack 10 is rotatably arranged with a loading arm 11 close to the rear drying cylinder group 3; the upper end of the loading arm 11 is rotatably arranged with the second air roller 14; the lower end of the loading arm 11 and the second rack 10 are rotatably arranged with a first driving mechanism for driving the loading arm 11 to rotate. The first driving mechanism can be a loading hydraulic cylinder 15; the two ends of the loading hydraulic cylinder 15 are rotatably arranged on the rack and the loading arm 11 through a first pin shaft 16 and a second pin shaft 17 respectively. The loading arm 11 and the second rack 10 are rotatably connected through a connecting pin shaft 12.

[0022] The front dryer group 1 comprises a plurality of ordinary dryers 5 arranged on the first frame 4 and located in the upper row, and a plurality of cylinder face punching dryers 6 arranged in the lower row and staggered with the ordinary dryers 5. The first air roller 13 is arranged below the right of the ordinary dryer 5 at the right end of the front dryer group 1. The upper part of the first air roller 13 is provided with a dry net guide roller 7. The front dryer group 1 further comprises a paper web stabilizer 8 arranged between the upper row and the lower row, and other dry net guide rollers 7 arranged above the ordinary dryers 5 in the upper row. The first dry net 9 passes over the upper surface of the ordinary dryers 5 in the upper row and the lower surface of the cylinder face punching dryers 6 in the lower row and the first air roller 13. The front dryer group 1 constitutes a dryer single hanging structure. The above-mentioned parts are arranged on the first frame 4.

[0023] The rear dryer group 3 comprises a plurality of cylinder face punching dryers 6 arranged on the first frame 4 and located in the upper row, and a plurality of ordinary dryers 5 arranged in the lower row and staggered with the cylinder face punching dryers 6. The second air roller 14 is arranged above the left of the ordinary dryer 5 at the left end of the rear dryer group 3. The lower part of the second air roller 14 is provided with a dry net guide roller 7. The second air roller 14 is located above the right of the first air roller 13. The rear dryer group 3 further comprises a paper web stabilizer 8 arranged between the upper row and the lower row, and other dry net guide rollers 7 arranged below the ordinary dryers 5 in the lower row. The second dry net 18 passes over the lower surface of the ordinary dryers 5 in the lower row and the upper surface of the cylinder face punching dryers 6 in the upper row and the second air roller 14, constituting a reverse single hanging structure. The ordinary dryers 5 and the cylinder face punching dryers 6 are both prior art, rotatingly arranged on the first frame 4, and can be driven to rotate by any driving mechanism. The above-mentioned parts are arranged on the first frame 4. The first dry net 9 and the second dry net 18 respectively constitute a complete closed loop. The parts of the first dry net 9 and the second dry net 18 between the first air roller 13 and the second air roller 14 are respectively located on both sides of the paper web.

[0024] Specifically, the outer surfaces of the first air roller 13 and the second air roller 14 are respectively provided with air holes in communication with the respective internal cavities and external air fans, and the air holes form negative pressure on the outer surfaces by air extraction of the external air fans. The first air roller 13 and the second air roller 14 form negative pressure adsorption on the surfaces by air extraction of the air fans. The air roller can also be a vacuum roller, and its structure belongs to the prior art and will not be described in detail.

[0025] In the implementation, when the paper web enters the drying section from the left end, the paper web stabilizer 8 is above the first drying wire 9, the paper web is below the first drying wire 9, the paper web stabilizer 8 draws air in contact with the first drying wire 9 by an external air blower to form a negative pressure, and the first drying wire 9 has air permeability, so that the paper web is adsorbed on the surface of the first drying wire 9. Then the paper web enters the ordinary drying cylinder 5 under the wrapping of the first drying wire 9, and after the paper web exits the ordinary drying cylinder 5, the paper web is outside the first drying wire 9, the paper web stabilizer 8 draws air on both sides in contact with the first drying wire 9 by an external air blower, and at the same time, the surface of the cylinder face perforated drying cylinder 6 is uniformly distributed with small holes, the paper web stabilizer 8 draws air in the cylinder body, and the paper web is stably adsorbed on the surface of the first drying wire 9 under the negative pressure of the cylinder face perforated drying cylinder 6. The paper web repeatedly moves up and down to reach the first air roller 13 of the transfer roller group 2, the first air roller 13 draws air in the first air roller 13 by an external air blower to form a negative pressure on the surface of the first air roller 13, and the paper web is adsorbed on the surface of the first drying wire. When the paper web separates from the first air roller 13 and is ready to enter the suction area of the second air roller 14, there is an open distance, and in this process, the first first drying wire of the front drying cylinder group 1 and the second first drying wire of the rear drying cylinder group 3 respectively tighten the paper web from both sides. The paper web is sent to the suction area of the second air roller 14 under the driving of the first drying wire, and the working principle of the second air roller 14 is similar to that of the first air roller 13. Therefore, the paper web enters the rear drying cylinder group 3 from the front drying cylinder group 1, realizes the transfer of the paper web between the two drying cylinder groups, and the paper web enters the rear drying cylinder group 3, the surface of the paper web in contact with the front drying cylinder group 1 is changed to be in contact with the second drying wire 18, and the paper web changing operation is realized. After entering the rear drying cylinder group 3, the paper web is wrapped by the second drying wire 18 to the surface of the ordinary drying cylinder 5, and after the paper web exits the ordinary drying cylinder 5, the paper web is adsorbed on the surface of the second drying wire 18 under the action of the paper web stabilizer 8, and after the paper web exits the cylinder face perforated drying cylinder 6, the paper web continues to be wrapped by the second drying wire 18 to the surface of the ordinary drying cylinder 5, and the paper web is supported out of the rear drying cylinder group 3 by the second drying wire 18.

[0026] The paper web can be stably fixed during the front and back surface conversion process, the problem that the paper web is in suspension and floating is avoided, the success rate is improved in the paper leading process, the stability of the paper web is enhanced in the normal use process, the paper breaking frequency is reduced, the reverse single hanging structure is adopted in the subsequent paper web running process, the stability of the paper web is enhanced, the continuous production of the paper machine is ensured, the downtime is reduced, and the production benefit is improved.

[0027] Any combination of the technical features in the above-described embodiments can be made, as long as the combination of the technical features does not contradict, it shall be considered as the scope recorded in the description. Without departing from the overall concept of the present application, according to the technical scheme of the present application and equivalent replacement or change, and several changes and improvements made, should also be considered as the protection scope of the present application.

Claims

1. A single-hanging to reverse-single-hanging structure for a drying section, comprising a front drying cylinder group and a rear drying cylinder group; characterized in that: A transfer roller assembly is provided between the front drying cylinder assembly and the rear drying cylinder assembly; the transfer roller assembly includes a second frame and a first air roller and a second air roller rotatably mounted on the second frame, whose outer surfaces are subjected to negative pressure to adsorb the paper web; a first dry wire is provided to bypass the front drying cylinder assembly and the first air roller close to the front drying cylinder assembly, and a second dry wire is provided to bypass the rear drying cylinder assembly and the second air roller close to the rear drying cylinder assembly; the first and second dry wires clamp the paper web from both sides; at least one of the first and second air rollers is adjustable in position relative to the frame.

2. The drying section single-hanging to reverse single-hanging structure according to claim 1, characterized in that: A loading arm is rotatably mounted on the second frame near the rear drying cylinder assembly; a second air roller is rotatably mounted on the upper end of the loading arm; a first drive mechanism that pushes the loading arm to rotate is hinged between the lower end of the loading arm and the second frame.

3. The drying section single-hanging to reverse single-hanging structure according to claim 1, characterized in that: The front drying cylinder group includes several ordinary drying cylinders arranged on the first frame in the upper row and several perforated drying cylinders arranged in the lower row, which are offset from the ordinary drying cylinders; the first air roller is arranged to the lower right of the ordinary drying cylinder at the far right end of the front drying cylinder group; a dry net guide roller is arranged above the first air roller.

4. The drying section single-hanging to reverse single-hanging structure according to claim 3, characterized in that: The rear drying cylinder group includes several perforated drying cylinders located in the upper row on the first frame and several ordinary drying cylinders located in the lower row that are offset from the perforated drying cylinders; the second air roller is located to the upper left of the ordinary drying cylinder at the leftmost end of the rear drying cylinder group; a dry net guide roller is located below the second air roller; the second air roller is located to the upper right of the first air roller.

5. The drying section single-hanging to reverse single-hanging structure according to claim 1, characterized in that: The outer surfaces of the first and second air rollers are respectively provided with air holes that are connected to their respective internal cavities and external fans, and negative pressure is formed on the outer surfaces by the external fans drawing air.

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