JPS62162093A - Papermaking material drying cylinder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper material drying tube useful for single-tube or multi-tube drying devices that are widely used in the paper and pulp industries.

[Prior art]

9 A rotary cylinder with internal steam heating, in which wet papermaking materials such as paper and pulp are engaged and heated to dry, is used in the drying device.
Heat is dissipated from the surface of the mirror plate.

The amount of heat radiated is generally only about 4% of the total amount of heat radiated by the rotating tubes, but in recent years, as the speed of paper machines has increased, the number of rotating tubes used in the drying equipment has exceeded 100. As the rotational speed of the rotary tube increases, the amount of heat dissipated from its end plate also tends to increase and cannot be ignored.

Therefore, in order to suppress heat dissipation from this mirror plate.

For example, Jitko No. 48-039724, Jitko No. 60-04
Glass wool is wrapped in a bag divided into semicircular shapes or smaller, which is sewn from glass cloth whose surface has been specially treated, as shown in Publication No. 0640.

These bags are joined together with heat-resistant fasteners and wire to form a circular heat-insulating mat, which is then attached to the end plate of the rotating tube using an outer circumferential mounting jig and an inner circumferential mounting jig, with or without using a hetome. Insulation material fixed to the shaft neck.

Thermal cover, also Utility Model No. 61-00397, Utility Model No. 5
Various proposals have been made, such as a rotating cylinder in which the surface of the end plate is covered with a coated foamed resin, or a split heat insulating film is attached to the surface of the end plate, as shown in Japanese Patent No. 8-129494.

[Problem that the invention seeks to solve]

However, with the above-mentioned heat insulating materials and thermal covers, it is not possible to pack glass wool into the bag to a density that maximizes the heat insulating effect. In addition, the thickness and density of the glass wool may be uneven due to the sewing process.

Furthermore, due to the high speed of the rotating tube, the glass wool moves inside the bag, causing uneven thickness and density, making it impossible to obtain the insulation effect of I and H. Due to the coming cost increases, the economic significance of insulation will be lost.

Furthermore, with the head plate covered with foamed resin or with a split heat insulating membrane, it is true that the above-mentioned problems arise from the complexity of sewing and attaching the bag.]
Although the strike height was eliminated, due to the strong centrifugal force that accompanies the high speed of the 9 rotating cylinder, there was a problem in that the 9 foam resin coating and heat insulating film could not be made to the thickness and density that would maximize the heat insulating effect.

Especially, as shown in Japanese Utility Model Application Publication No. 165499/1983, two surfaces are coated with a heat-resistant and flame-retardant special treatment agent.

For example, a circular insulation board coated with silicone resin and divided into sections, such as a board made of high-density compressed heat-resistant fibers (class wool board or light cal board), is applied to almost the entire surface of the sharp part of the rotary cylinder, and the outer periphery is attached to the sharp part. A rotary tube in which the board is fixed by an outer periphery mounting jig fixed by bolts or nuts attached to the outer periphery bolts, and the board is fixed by an inner periphery mounting jig on the inner periphery. As a result, it has become possible to use a heat insulating board with a thickness of about 50% and a density of about 30 kg/m' that maximizes the heat insulating effect, reducing the amount of heat dissipated from the bowl by about 50% compared to when using the glass wool mat. It is stated that it was possible to reduce the

However, even with the proposal of the above-mentioned Japanese Utility Model Application No. 60-165499, the high cost caused by the complexity of joining the two divided insulation boards together and attaching them to the sharp part of the rotary cylinder cannot be solved. Because 9
Circumferential speed 400m/rr1in~1500m/min,
In order to resist the strong centrifugal force in a rotating cylinder that is rotating at high speed, not only do members such as stronger 9 reinforced boards, mats, and attachment and connection jigs be required, but
In order to maximize the heat insulation effect, it is necessary to increase the thickness and density of the reinforcing boards and mats, so the reinforcing structure of the boards and mats, as well as their connection and mounting jigs, etc., become double tracks, increasing costs. Because it will be. Furthermore, the more complicated the reinforcing structure, connection and attachment jig, etc., are, the lower the workability, safety, and economic efficiency will be. This also applies to those disclosed in Publication No. 58-500860 and Japanese Unexamined Patent Publication No. 58-191293.

[Technical issues]

Therefore, the present invention eliminates the complicated installation of divided insulation boards and mats on the 9-rotation tube, and allows the thickness and density of the boards and mats to be arbitrarily determined to maximize the insulation effect, allowing paper material drying. To provide a paper making machine equipped with an extremely simple structure of a heat insulating lid capable of covering the entire heat dissipating surface of the end plate of a rotating cylinder without being affected by the strong centrifugal force at all even if the rotating cylinder of the device rotates at any number of rotations and at high speed. There are technical issues in trying to realize a material drying tube.

[Means for solving problems]

In order to achieve the above-mentioned technical problem, the paper material drying cylinder according to the present invention rotates the outer periphery so as to cover the entire heat dissipation surface of the end plate of the inner heated rotary cylinder in which the wet paper material engages and is heated and dried. An annular heat insulating lid that is close to the cylinder and whose inner circumferential portion is fitted over the shaft neck of the rotary cylinder is fixed in position to the machine frame that supports the rotary cylinder via a fixing member, and is connected to the rotary cylinder. An airtight heat insulating chamber is formed between the rotary cylinder and the heat insulating lid by sealing the space between the outer circumference and the inner circumference of the heat insulating lid in the circumferential direction with a sealing member.

The heat insulating lid used in the paper drying cylinder according to the present invention is made of glass fiber whose surface is coated with a heat-resistant special treatment agent such as silicone resin.

Cloth bags woven from heat-resistant fiber yarns such as aramid fibers,
A heat-resistant mat made of bulky glass fiber cotton, heat-resistant foamed resin, or other insulating material and divided into semicircular or smaller pieces is fit into a circular assembly frame made of heat-resistant plates such as metal molded plates, and then bolted.・Heat-resistant fasteners that are fixed with mounting jigs such as nuts and sewn to the respective joints,
They are connected in a closed ring using wire, heat-resistant fiber thread, etc. A mat with a thickness of 20~ or more and a density of 1 ok/m or more, or a class wool board with a thin metal plate such as aluminum foil attached to the surface, or coated with a heat-resistant special treatment agent such as silicone resin. A heat-resistant board that is divided into semicircular or smaller shapes made of high-density compressed heat-resistant fiberboard or light calboard.

They were connected to each other in an annular shape using a joining metal fitting or the like. 5% thickness
A heat insulating board having a density of 50 kg/m' or more is preferable, but a mat-like or board-like annular heat-insulating lid made of any other known heat-resistant heat-insulating material may also be used. In order to reinforce the heat insulating cover, it is preferable to use a heat insulating cover in which a heat-resistant assembly frame such as a metal plate is attached to the outer periphery or inner periphery of the heat insulating cover (°C).

The wet paper material is engaged and heated to dry. The rotary cylinder, which is internally heated with a heating medium such as water vapor, is widely used in conventional single-tube or multi-tube drying apparatuses and is well known, so it will not be described in detail.

In order to form an airtight heat insulating chamber between the rotating cylinder and the heat insulating lid, the space between the outer periphery and inner periphery of the heat insulating lid and each part or each surface part of the rotating cylinder facing each other in the circumferential direction is As a sealing member for sealing each of the bridges, an annular flexible sheet made of a heat-resistant and layer-resistant material such as fluorine-based synthetic resin or synthetic rubber is placed around the outer circumference or inner circumference of the heat insulating lid slightly from each other in the axial direction. A sheet parasitic sheet comprising at least one flexible sheet protrudingly provided at a distance from each other, the leading end of each flexible sheet slidingly contacting each surface portion of a rotary cylinder that faces each part of the heat insulating lid in the circumferential direction.

Heat-resistant and abrasion-resistant fine hairs such as aramid fibers, carbon fibers, or various types of T-ramic fibers are densely planted in the circumferential direction on the outer or inner circumference of the heat-insulating lid, and the tips of the fine hairs are attached to each part of the heat-insulating lid. A brush ballast formed by slidingly contacting each surface portion of a rotating cylinder that faces closely to the brush ballast.

One or more fins protruding from the outer periphery or the inner periphery of the heat insulating lid and extending circumferentially in close proximity to each other.

The tip of each fin is located close to each surface portion of the rotary tube that faces each part of the heat insulating lid, or the rotary tube that faces the outer periphery or the inner periphery of the heat insulating lid, respectively. 1 extending in the circumferential direction close to or in contact with each other in each part of
A lapilisis pannon consisting of pairs or more of fins protruding from each other so as to engage with each other alternately, between the inner periphery of the heat insulating lid and the shaft neck of the rotating cylinder adjacent thereto, or between the outer periphery of the heat insulating lid and the neck of the rotating cylinder adjacent thereto. Any known sealing structure may be used, such as a sealed bearing that is provided between opposing parts of the rotating cylinder, allows the rotating cylinder part to rotatably support the heat insulating lid, and seals the space between them in the circumferential direction. Although it can be used as a sealing member to seal between the outer periphery of the 9-turn cylinder and the outer periphery of the heat-insulating lid, the outer diameter of the 9-turn cylinder is usually about 1500% or more, so it has low friction and A lapiliary sealant with good sealing effect is suitable.

One end of the insulation lid is bolted to the machine frame of the paper machine drying device that supports the rotating cylinder, and the other end is bolted to the assembly frame of the insulation lid, etc., so that the insulation lid is always in the same position regardless of the high speed rotation of the rotating cylinder. It must be fixed via a fixing member such as one or more fixing rods. In this case, it is most preferable that the heat insulating cover is supported and fixed at three points to the nine machine frames via fixing members.

In this way, an airtight internal heat insulating chamber with excellent heat insulation properties is formed between the two-turn cylinder and the heat insulating lid.

[For production]

Said technical means work as follows.

The wet paper material, which has been dehydrated and rolled into a thin strip after passing through the wire mesh section and water squeezing section of the paper machine, is then passed through the drying device of the paper machine, where it is partially exposed to the heat dissipating outer peripheral surface of the internally heated rotating cylinder. It is heated and dried.

At this time, most of the heat radiated from the 1-turn cylinder is absorbed by the paper material and used for heating it, but the heat radiated from the end plate of the 9-turn cylinder is released from the outer periphery so as to cover the entire heat radiating surface of the end plate of the 9-turn cylinder. an annular heat insulating lid which is placed close to the rotating cylinder and whose inner circumferential portion is fitted onto the shaft neck of the rotating cylinder.

It is fixed in position via a fixing member to the machine frame which supports the shaft end of the rotary cylinder via a bearing, and a sealing member is used in the circumferential direction between the rotary cylinder and the outer and inner peripheral parts of the heat insulating lid. Since an airtight hollow heat insulating chamber is formed between the rotary cylinder and the heat insulating lid by sealing each other, heat dissipation to the atmosphere due to convection and radiation is prevented within the heat insulating chamber, and heat dissipation due to heat transfer is prevented. Very few.

At this time, the heat insulating lid is always stationary and fixed in position despite the high speed rotation of the rotary cylinder, and is completely insulated from the strong centrifugal force caused by the high speed rotation.

The heat insulating lid can be made to any desired thickness and density to maximize its heat insulating effect.

Even with insulation mats that have high insulation properties by packing insulation materials such as lath wool into insulation bags at a low density to increase the porosity, the insulation materials inside the bags will move to the surrounding area due to the strong centrifugal force. This prevents unevenness in the thickness and density of the heat insulating mat, and allows the best heat insulating effect to be exhibited at all times.

Furthermore, since the insulation lid does not rotate at high speed together with the 9-rotation cylinder, sewing the insulation bag and joining and attaching the split insulation lids are extremely simple and easy, and there is no need for the insulation lid with a 9-reinforced structure, and a joining and mounting jig is required. Any inexpensive item that can be easily disassembled and reassembled will suffice. Furthermore, the fixing members that support and fix the insulating lid to the machine frame can be of simple structure and inexpensive, and accidents such as parts such as coupling mounting jigs loosening and scattering during operation will not occur at all, and the insulating lid Extremely superior workability, safety, economic efficiency, and operational stability, as there is no chance of paper dust or other debris adhering to the paper scattering around, contaminating the papermaking material and resulting in defective products. It has many advantages such as thermal economy.In addition, since no heat is radiated from the end plate of the 9-rotation cylinder, the side edges of the paper material running inside the dryer are not exposed to the hot air flow heated by the heat radiated. This also eliminates the problem of over-drying, causing wrinkles and swelling.

〔Example〕

A first example showing a cross-sectional view of an embodiment of a paper material drying cylinder according to the present invention.
This will be explained in detail below with reference to the drawings.

In the above embodiment, the wet paper material p partially engages with the heat dissipating smooth outer circumferential surface and is heated and dried with the internal water vapor τ so as to cover the entire heat dissipating surface of the operation side and drive side end plate 10 of the rotating cylinder 1 to be heated. The annular heat insulating lid 2 has an outer peripheral part 20 close to the outer peripheral part 14 of the rotary cylinder 1 and an inner peripheral part 22 fitted onto the shaft neck 16 of the rotary cylinder 1.

The rotating cylinder 1 is fixed in position via a rod-shaped fixing member 4 to a machine frame 3 which supports the rotary cylinder 1 via a bearing 30.

The outer circumferential portion 20 and inner circumferential portion 22 of the rotary cylinder 1 and the insulating lid 2 adjacent thereto are sealed by sealing members 5 in the circumferential direction, thereby providing airtight insulation between the rotary cylinder 1 and the insulating lid 2. A chamber 6 is formed.

The operation-side heat insulating lid 2 is constructed by connecting a pair of semi-circular divided frames formed from metal plates (or heat-resistant reinforced plastic plates) to each other at their protruding ends 240 with bolts and nuts 242. Glass fiber cotton 9 is attached to a cloth bag 210 made of glass fiber yarn, the surface of which has been coated with a silicone resin, on a divided assembly frame 24 formed in the same manner as shown in FIG.
A pair of semicircular cloaks, which are evenly packed and formed to have a thickness of about 30% and a thickness of about 30%, are sewn to the side ends of each.
At the same time, the heat-insulating mats 21 connected to each other with heat-resistant fasteners 212 and formed into an annular shape are fitted, and the heat-insulating mats 2
A bolt 244 protruding from the split assembly frame 24 is passed through the eyelet 214 attached to the frame 1 and tightened with a nut. Also, the drive side insulation lid 2.

A pair of closed-cell porous semi-circular mats made of a heat-insulating polymer material are formed into a circular ring shape with their side ends in close contact with each other, and the mats are fitted into a circular divided assembly frame 24 having almost the same structure as described above. A bolt 24 protrudes from a nine-part assembly frame 24 into a through hole drilled in a heat insulating mat 21 formed in an annular shape.
4 is passed through and tightened with a nut.

One end of the heat insulating lid 2 is screwed through a joint screwed onto a bolt 244 protruding from its surface.

The other end thereof is fixed in position to the machine frame 5 via a rod-shaped fixing member 4 screwed onto the machine frame 6. The proximity between the heat insulating lid 2 and the rotating cylinder 1 adjacent thereto is precisely adjusted by the joint.

A strip-shaped circumferential groove 120 extending in the circumferential direction is carved in the operation side surface of the outer circumference 14 of the rotary cylinder 1, and a circumferential groove 120 extending in the circumferential direction has a comb-shaped axial cross section in the driving side surface of the outer circumference 14. 1
20 is engraved on the rim portion 246 of the heat insulating lid 20 split assembly frame 24 which is placed close to the operating side outer peripheral portion 14 of the nine-turn cylinder 1.

An annular shaped member 50 formed by connecting a pair of semi-annular members to each other at their ends is attached to the circumferential groove 12 of the rotating cylinder 1.
A brush sealing member 5 in which heat-resistant and abrasion-resistant fine bristles f whose nine bristles are in sliding contact with the circumferential groove 120 are densely planted in the circumferential direction on the side surface of the L-shaped member 50 that closely opposes the brush sealing member 5 The space between the 9-rotation tube 1 and the operation-side insulation lid 2 adjacent thereto is sealed in the circumferential direction, and one end is closely fixed to the boss portion 248 of the split assembly frame 24 of the operation-side insulation lid 2, and the other end is tightly fixed. bearing 60
It was tightly fixed to the axle box 300 of. A split pipe member 52 having a semicircular cross section in a direction perpendicular to the longitudinal direction.

The space between the 9-rotating cylinder 1 and the operating-side heat-insulating lid 2 adjacent thereto is sealed by a tubular sealing member 5 formed by tightly connecting the long-split ends to each other so as to enclose the shaft neck 16 of the rotating cylinder 1. An airtight heat insulating chamber 6 is formed between the nine-turn cylinder 1 and the operating side heat insulating lid 2. On the other hand, on the side of the split assembly frame 24 of the heat insulating lid 2 which is close to and faces the side surface of the driving side outer circumferential portion 14 of the two-rotation barrel 1, fin members each having a cutting edge inserted into the circumferential groove 120 facing each other are provided. 54 extends in the circumferential direction and protrudes in an annular shape to seal the space between the 9-rotation cylinder 1 and the drive-side heat insulation lid 2 adjacent thereto in the circumferential direction, and to provide drive-side heat insulation. A shaft seal consisting of a journal bearing sealing member 56 provided between the inner circumferential surface of the boss portion 248 of the lid 20 divided assembly frame 24 and the outer circumferential surface portion of the shaft neck 16 of the rotary cylinder 1 that faces and approaches the inner circumferential surface of the boss portion 248. The stopper member 5 seals the space between the 9-turn cylinder 1 and the inner circumferential portion of the drive-side heat-insulating lid 2 adjacent thereto in the circumferential direction, so that the 1-turn cylinder 1 and the drive-side heat-insulating lid 2 are sealed.
An airtight heat insulating chamber 6 is formed between the two.

〔effect〕

That is, in the paper material drying cylinder according to the present invention, the heat insulating lid that covers the entire heat dissipating surface of the end plate of the nine-turn cylinder does not rotate at high speed together with the rotary cylinder, so the thickness of the heat insulating board, mat, etc. that maximizes the insulation effect, Not only can the density be arbitrarily determined, but also the strong centrifugal force caused by the high-speed rotation of the two-rotation cylinder is not applied at all, so the heat insulating lid has a simple structure and can be manufactured at an extremely low cost. Since the rotary cylinder and the heat insulating lid are completely insulated in this way, there is no need for any attachment jig for attaching or pasting the heat insulating lid to the rotary cylinder.

In addition, there is no need to process the rotary cylinder for this attachment. Therefore, it is extremely easy and inexpensive to apply the present invention to existing rotary tubes often used in paper machine drying devices, etc., and it is safe and does not interfere with the work of the operator.

Furthermore, during operation, equipment damage, personal injury, or papermaking may occur due to parts such as mounting jigs flying off the insulation lid and rotating tube, or dirt such as paper powder adhering to the insulation lid flying around. No staining or damage to the product occurs.

Also, check whether there is any sliding contact between the insulating lid and the rotating cylinder.
Even if there is one, the only thing that can be used is a cheap and easily replaceable piece such as a brush, and since it is possible to select a material that has very little wear and tear for the piece, its lifespan is extremely long. Furthermore, the heat insulating materials such as glass fiber cotton and heat insulating foamed synthetic resin pieces in the heat insulating lid do not shift at all during operation, and the best and most stable heat insulating effect can be permanently demonstrated at all times.

As described above, the paper material drying cylinder according to the present invention not only has excellent heat insulation properties as described above, but also has excellent safety properties.

Stability 9: This is because it has many superior effects compared to conventional techniques in terms of workability and economy.

Its utility value in the paper and pulp business field is extremely high.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a paper material drying cylinder according to the present invention. [Explanation of symbols] 1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
・ ・ Rotating tube 10・・・・・・・・・
・・Mirror plate 16・・・・・・・・・・Axis Neck 2
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
・ ・ Insulation lid 20 ・ ・ ・ ・ ・
・ ・ ・ ・ ・ ・ ・ Outer peripheral part 22
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
Inner peripheral part 6・・・・・・・・・・・・ Machine
Frame 4...Fixing member 5...
・・・・・・・・ Sealing member 6 ・ ・ ・ ・
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Insulation room p・・・・・・・・・・・・・・・ Wet papermaking material procedure amendment (Method) July 7, 1986
Michibe Uga, Director General of the Japan Patent Office1, Indication of Case Patent Application No. 4816 of 19852,
Title of the invention Paper material drying cylinder 3, Person making the amendment March 25, 1985 5, Subject of the amendment Full text of the specification, drawings 6, Contents of the amendment An engraving of the specification and drawings originally attached to the application and an attached sheet (Contents remain unchanged).

Claims (1)

[Claims] 1. Bring the outer peripheral part close to the rotary cylinder so as to cover the entire heat dissipation surface of the end plate of the internally heated rotary cylinder in which the wet paper material is engaged and heated to dry, and the inner peripheral part to the shaft neck of the rotary cylinder. The inserted annular heat insulating lid is fixed in position to the machine frame that supports the rotary cylinder via a fixing member, and seals between the rotary cylinder and the outer and inner peripheral parts of the heat insulating lid in the circumferential direction. A papermaking material drying tube characterized in that an airtight heat insulating chamber is formed between the rotary tube and the heat insulating lid, each being sealed by a stopper member.