CN212237614U - Blade structure for particle machine and knife roller formed by blade structure - Google Patents

Abstract

The utility model discloses a blade structure for particle machine, including the flaky blade main part of one side evagination formation work flank, an organic whole is connected in the connecting portion that are used for installing on the particle machine of blade main part one end to and along its mill cutting teeth that move towards intensive arranging on the work flank of blade main part, wherein, the thickness of blade main part is 1 ~ 5 mm. And provides a knife roller formed by the blade structure. The utility model discloses blade structural design is carried out to basic design thinking based on particle machine, keep the structural strength of slice blade through specific evagination structure, and dispose specifically in the blade main part and grind the tooth, change the broken form of cutting to the material from broken principle essence, change into bumping, grinding, cutting compound mode by original single collision or cutting mode, cooperate the high-speed running state of particle machine itself, thereby obtain extremely good broken granulation effect, in order to satisfy the demand to the material on the follow-up application.

Description

Blade structure for particle machine and knife roller formed by blade structure

Technical Field

The utility model relates to a particle machine technical field, specifically say, relate to a knife roll that is used for particle machine's blade structure and constitutes.

Background

The environmental protection problem is one of the important problems for constructing ecological civilization. On one hand, the method controls through relevant policies, on the other hand, the method carries out industrial major tuning, promotes scientific and technological innovation, and solves a plurality of problems in environmental protection by utilizing new technology application. Among them, the prohibition of burning agricultural and forestry wastes is an important aspect of reducing environmental air pollution, and although relevant policies are implemented for many years, relevant departments also spend great manpower and financial resources, the effect is difficult to be ideal, and the situation is likely to continue.

Agricultural waste includes crop stalks, straw, etc., and forestry waste includes old fruit trees, twigs, barks, leftover bits, etc., and eradicated weeds, shrubs, etc. Most of the plants are directly cut or collected, the plant fiber content is high, the humidity is high under the condition that the plants are not dried after cut or collection, the plants are generally treated as waste garbage, the subsequent treatment cost is very high, and the plants are large in quantity, wide in dispersion area, low in value, difficult to treat and narrow in available range. The existing treatment mode is that the agriculture and forestry waste materials distributed in a large range are collected and then simply cut into small pieces for treatment, but the waste materials are still waste materials, have no market economic value and no treatment enthusiasm, and the corresponding environmental protection policy can only be forcibly promoted by strengthening supervision and issuing subsidies by relevant departments, so that a large amount of manpower and financial resources are consumed, the effect is still unsatisfactory, and the environmental protection problem is difficult to solve fundamentally.

After investigation, the inventor finds that, for the directly felled/collected agricultural and forestry waste materials such as branches, crops, shrubs and the like which are not dried, have large humidity and high fiber content, because the waste materials belong to plant materials, if the waste materials can be treated to a small degree in certain specific fields, the waste materials can play a role, generate a utilization value, exert a market economic value, reversely promote the enthusiasm of people for treating the materials, and promote the execution of an environmental protection policy by utilizing the market economic characteristic. Such as organic fertilizer production, mushroom planting, machine-made charcoal production, breeding industry, straw returning and the like. However, in the production of fertilizers, if the granularity of materials is not small enough, the time of fermentation treatment procedures can be obviously increased, the production effect and the production process can be influenced, and organic fertilizer manufacturers can naturally not consider recovering the plant wastes; in mushroom planting, if the material can not reach the level of the conventional sawdust material, the material is difficult to apply; in the production of mechanical carbon, the plant raw materials have specific requirements, and the granularity must be less than 3-5 mm; in the breeding industry, plant materials which are fine enough can be used as feed fillers; in the field returning of the straws, if the granularity of the plant materials such as the straws returned to the field is not small enough, the process of forming humus in the field is greatly increased, the original effect of the soil can be influenced before the humus is formed, the soil fertility cannot be increased, the subsequent agricultural production activity can be seriously influenced, and the like.

Taking the organic fertilizer industry as an example: at present, the aspects of building plants, purchasing equipment, collecting and treating raw materials and the like are subsidized, but the viability of organic fertilizer plants is still a problem, and the main reason is that the existing production cost is high. Organic fertilizers have a wide market, but need to compete with other fertilizers for the market, and the cost performance is critical. Only by reducing the cost can the wide market be occupied. But the cost is difficult to reduce due to the existing treatment process. The current treatment process comprises the following steps: collecting, storing, drying, crushing, mixing additives and fermenting. The difficulty lies in the links of collection, storage, drying and pulverization. And (3) a collection link: because the plant substances are loose and widely distributed, the collection needs to cost a lot of labor cost and transportation cost. A storage-drying link: because the materials are loose, a large area of field is needed for storage, and the drying time is long (generally, a natural air drying mode is adopted, and if a drying device is adopted, high equipment purchasing cost and high energy consumption are needed), so that high storage cost is generated and the risk of fire is high. And (3) a crushing link: because the prior art can only crush and process dry materials, the power demand is high, the energy consumption is high, the noise in a production workshop and dust are very large, serious problems exist in safe and environment-friendly production, the fire risk and the explosion risk exist, the occupational disease risk of staff also exists, and the environmental air pollution is serious. Therefore, the direct cost, the indirect cost and the potential cost of the organic fertilizer production are high, even if subsidies are added, the competitive advantages are still not achieved, and the organic fertilizer industry is still difficult to develop and develop. In addition, theoretically, the wide organic fertilizer market can enable the production of organic fertilizers to become the main power for eliminating agricultural and forestry wastes, and the development of the organic fertilizers cannot be realized, so that the environmental protection policy of prohibiting incineration is difficult to implement.

The existing industrial equipment for processing materials into small volume mainly comprises a crusher and a chipper. The crusher mainly uses a hammer structure which continuously rotates to hammer materials, and then discharges the materials through a screen, but only dry materials can be processed, and the crusher has poor effect on the materials which are not dried, have high humidity and high fiber content and basically cannot achieve the required crushing granularity; when materials with high humidity are actually treated, a drying process is added before treatment, the natural drying time is long, the equipment drying energy consumption is high, and the integral treatment cost is very high. The chipper generally aims at plant raw materials such as bamboo and wood, and the continuously fed materials are cut into small pieces and discharged through a rotating fly cutter structure, but the particle size of the sheet materials obtained by conventional structure treatment is limited (the thickness is generally 3-5mm, and the length is 15-20mm), the required particle size cannot be met, and the sheet materials with high humidity and high fiber content are difficult to treat. The failure to effectively treat plant waste materials with heavy water and heavy fiber is also a pain point and difficulty in the industry.

In contrast, the inventor designs a particle machine device, which can crush and process the directly felled/collected branches/crops/shrubs and other forestry and agricultural residues which are not dried, have high humidity and high fiber content and are conventionally treated as garbage into particles with practical utilization value, and the particles can meet the requirements of further production and processing in some specific fields by taking the particles as raw materials. The design of the blade structure is important.

The term "microparticles" in the art refers to regular or irregular fine particles having a maximum dimension of less than 5 mm.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem among the above-mentioned prior art, the utility model provides a blade structure for particle machine.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

the utility model provides a blade structure for particle machine, includes the flaky blade main part that one side evagination formed work blade face, an organic whole is connected in the connecting portion that are used for installing on the particle machine of blade main part one end to and along the grinding cutting teeth that its trend was arranged intensively on the work blade face of blade main part, wherein, the thickness of blade main part is 1 ~ 5mm, the distance of any point to the collinear same straight line of drawing forth by this side root of blade main part is the trend of gradually increasing from this root along work blade face trend direction on the work blade face of blade main part, the contained angle of the orientation work blade face that forms between the tangent line of any point on the work blade face of blade main part and this work blade face root place horizontal straight line is not less than 0.

Specifically, the connecting part is in any one of a convex rectangular shape, a concave clamping groove shape, a convex dovetail shape, a through hole shape and a groove hole shape.

Furthermore, at least one auxiliary blade is fixedly connected to the flaky side face of the blade main body, and grinding auxiliary teeth are densely distributed on one side, far away from the blade main body, of the auxiliary blade.

Specifically, the included angle between the extension direction of the auxiliary blade and the rotating circular surface direction of the blade main body is-30 degrees.

Specifically, the height of the auxiliary blade protruding from the side surface of the blade body gradually increases from one end toward the grinding tooth to the other end.

Specifically, the included angle between the side where the grinding auxiliary teeth are located and the sheet-shaped side of the blade main body is 5-20 degrees.

On the other hand, the utility model provides a rotor for granule machine based on above-mentioned structure, including being the roll body of cylinder form, run through the shaft hole of seting up in the roll body axial region, a plurality of settlement logical grooves that are the circumference equipartition of seting up at roll body circumference side, a plurality of cards are arranged in side by side and settle aforementioned blade structure that leads to the inslot, install in settling logical inslot and will be adjacent blade structure spaced apart cushion to and settle logical groove tip and roll body fixed connection's joint block, wherein, the connecting portion card of blade structure is arranged in settle logical inslot, make the grinding tooth towards roll body rotation direction.

Specifically, the cross-sectional shape of the installation through groove matches the shape of the connection part.

Furthermore, an included angle of 5-25 degrees is formed between the sheet-shaped side face of the blade structure and the rotating circular face of the roller body.

The cushion blocks comprise middle cushion blocks arranged between adjacent blade structures and end cushion blocks arranged between the blade structures and the sealing blocks, wherein two end faces of each middle cushion block are parallel, and an included angle between the end face of each middle cushion block and a rotating circular face of the roller body is matched with an included angle between a sheet-shaped side face of each blade structure and the rotating circular face of the roller body; the included angle between the end face of the end cushion block facing the blade structure and the rotating circular face of the roller body is matched with the included angle between the sheet-shaped side face of the blade structure and the rotating circular face of the roller body, and the end face of the end cushion block facing the sealing block is parallel to the rotating circular face of the roller body.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the utility model discloses blade structural design is carried out to basic design thinking based on granulator, keep the structural strength of slice blade through specific arc structure, and dispose the grinding tooth specifically in the blade main part, change the broken form of cutting to the material from broken principle essence, change into by original single collision or cutting mode and bump, grind, cut compound mode, the high-speed running state of cooperation granulator itself, thereby obtain good broken granulation effect, with satisfy the demand to the material on the follow-up application, especially to moisture heavy, the heavy this kind of plant class raw materials of present trade pain point of fibre have outstanding throughput, specially adapted to those that directly fell down gather not dry \ the great branch of humidity crop \ bush etc. agricultural and forest waste material's crushing treatment. The utility model relates to an ingenious, simple structure, convenient to use is suitable for and uses in the particle machine.

(2) The utility model discloses configure the connecting portion of blade main part into multiple structural style, be convenient for and the particle machine roller body coupling of different forms, satisfied different installation demands among the practical application.

(3) The utility model discloses an at the vice blade of blade main part side configuration and grind and cut vice tooth, form and cut at the ascending mill of rotating the anchor ring side, cooperate this kind of specific structure's blade main part to cut the combined processing mode at the ascending mill of rotation disc side, realized the comprehensive broken handling to being in the processing position raw materials, further improved broken granulation effect, solved the problem of the difficult point of trade pain better.

(4) The utility model discloses to vice blade and the design of grinding vice tooth on concrete forms such as each angle, further improved the grinding effect of blade side part and to the stirring effect of material to effectively reduced the material that side bulge probably produced and detained/twine the effect, more do benefit to the whole breakage in the processing station.

(5) The utility model discloses a rotor adopts the draw-in groove mode to install the blade, adopts cushion and sealing block to keep and lock the blade, has fully guaranteed that the blade settles fixed stability and security, provides the guarantee for the high-speed operation of blade.

(6) The utility model discloses the ingenious inclined plane design that utilizes cushion and blade contact terminal surface, it is in for the state that rotates the disk slight slope to make the blade settle the back, can produce axial displacement's effect to the material after rotating, so on the basis that can realize the axial ejection of compact, thereby still make the material receive more irregular motion production more to do benefit to by the combined action breakage of blade at the axial displacement in-process effort, and at the axle move in-process material again by a plurality of blades that the axial was arranged repeated the effect breakage, such multiple action makes the material of being handled obtain the granularity size and the granularity degree of ideal more easily.

(7) The utility model discloses indirectly utilize the cushion to realize the configuration of blade inclination, need not change or complicate the structure of blade structure itself deliberately, because blade part belongs to the consumable part in the complete machine, need the mass production preparation in the industry, this kind of mode is more favorable to the blade batch manufacturing of simple structure, has laid good basis for the industrialization of particle machine equipment and part; meanwhile, the adjustment of the inclination of the blade can be realized by replacing the cushion blocks with different end surface inclinations, and because the cushion blocks do not belong to consumable parts, a plurality of groups of cushion blocks with different end surface inclinations can be configured in advance to serve as standard parts and replaced when the inclination of the blade needs to be adjusted, so that the standardization and modularization of parts are realized, and the industrialization foundation is enhanced.

Drawings

Fig. 1 is a schematic view of a blade structure according to an embodiment of the present invention.

Fig. 2 is a schematic perspective view of a blade portion according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a blade portion in an embodiment of the present invention.

Fig. 4 is another schematic structural view of a blade portion according to an embodiment of the present invention.

Fig. 5 is another schematic view of the blade portion according to an embodiment of the present invention.

Fig. 6 is another schematic view of the blade portion according to an embodiment of the present invention.

Fig. 7 is another schematic view of the blade portion according to an embodiment of the present invention.

Fig. 8 is another schematic view of the blade portion according to an embodiment of the present invention.

Fig. 9 is another schematic view of the blade portion according to an embodiment of the present invention.

Fig. 10 is another schematic view of the blade portion according to an embodiment of the present invention.

Fig. 11 is an enhanced structure diagram of a blade portion according to an embodiment of the present invention.

Fig. 12 is a schematic view of the working mode of the blade according to an embodiment of the present invention.

Fig. 13 is a schematic end view of a knife roll portion according to an embodiment of the present invention.

Fig. 14 is a schematic partial exploded view of a knife roll portion according to an embodiment of the present invention.

Fig. 15 is a schematic top view of an end block according to an embodiment of the present invention.

Fig. 16 is a schematic view of an application state of a knife roll portion in an embodiment of the present invention.

In the drawings, the names of the parts corresponding to the reference numerals are as follows:

1-blade structure, 2-roller body, 3-shaft hole, 4-arrangement through groove, 5-cushion block, 6-sealing block, 5-1-middle cushion block, 5-2-end cushion block, 7-rotating shaft, 8-bearing seat, 9-belt wheel,

10-blade body, 11-connecting part, 12-grinding cutting tooth, 13-working blade surface, 15-auxiliary blade, 16-grinding cutting auxiliary tooth, 111-convex rectangular shape, 112-concave clamping groove shape, 113-convex dovetail shape, 114-through hole shape and 115-groove hole shape.

Detailed Description

The present invention will be further described with reference to the following drawings and examples, and embodiments of the present invention include, but are not limited to, the following examples.

Examples

As shown in fig. 1 to 3, the blade structure for the particle machine includes a blade main body 10 having a shape of a sheet with one side protruding outward to form a working edge surface 13, a connecting portion 11 integrally connected to one end of the blade main body and used for being mounted on the particle machine, and grinding teeth 12 densely arranged on the working edge surface of the blade main body along the direction of the working edge surface, wherein the thickness of the blade main body is 1-5 mm, and specifically, the thickness can be configured to be certain specific thicknesses according to the parameters of the size and the number of the application and the practical application requirements, such as 1.4mm, 1.8mm, 2.5mm, 3.2mm, 4mm, 4.4mm, 4.8mm, and the like. The distance from any point on the working blade surface of the blade body to the same straight line led out from the root part of the side of the blade body gradually increases from the root part along the trend direction of the working blade surface, and the increasing trend can be one or the combination of more of an acceleration increasing form, a uniform increasing form and a deceleration increasing form from the root part; an included angle alpha formed between a tangent line of any point on the working edge surface of the blade main body and a horizontal straight line where the root of the working edge surface is located and facing the working edge surface is not less than 0 degree, so that the radial part in the processing position can be completely covered in the radial direction of the rotating circular surface, and effective cutting is realized; the tail end adopts the flattening or smooth transition treatment; generally, the working edge surface is in the form of a smooth arc, or a plurality of broken lines, as shown in fig. 4-6. Specifically, the connecting part is in a sheet-shaped convex rectangular shape 111 which is the same as the blade main body, a small section of the connecting part is extended from the end part of the blade main body to serve as a connecting transition, and a rectangular shape with two sides protruding to serve as a clamping part is extended and expanded.

In another embodiment, as shown in fig. 7, the connecting portion is in the form of a concave slot 112, which extends from the end of the blade body for a suitable length as a base connecting portion and is concave on both sides to form a slot as a clamping portion.

In another embodiment, as shown in fig. 8, the connecting portion has a convex dovetail shape 113, which is formed by extending a small section from the end of the blade body as a connecting transition and then extending a trapezoidal shape with two convex sides as a clamping portion.

In another embodiment, as shown in fig. 9, the connecting portion is a through hole 114, which extends from the end of the blade body for a suitable length to serve as a base connecting portion, and a through hole is formed in the middle of the connecting portion to serve as a clamping portion.

In another embodiment, as shown in fig. 10, the connecting portion is in the form of a slotted hole 115 which extends from the end of the blade body by a suitable length to serve as a base connecting portion, and a through hole is formed in the middle thereof to communicate the through hole with the lower end of the base connecting portion, thereby serving as a catching portion.

Through the connecting part configuration of different forms, the installation requirement of the specific situation of the blade on the roller body of the particle machine can be met.

In another embodiment, as shown in fig. 11, an enhanced configuration is further provided on the basis of the blade structure, that is: at least one auxiliary blade 15 is fixedly connected to the flaky side surface of the blade main body, and grinding auxiliary teeth 16 are densely distributed on one side of the auxiliary blade far away from the blade main body. In the present embodiment, four secondary blades 15 are disposed on each side of the blade body, and are uniformly distributed in the lateral direction of the blade body, which is substantially parallel to the bottom of the connecting portion.

And the included angle between the extension direction of the auxiliary blade and the rotating circular surface direction of the blade main body is-30 degrees, namely the included angle of the auxiliary blade can be designed and preset to match with proper processing angles on different ring surfaces, and the disturbance to materials when the auxiliary blade rotates can be increased through the configuration of a certain angle.

In another embodiment, the configuration of the secondary blade is further optimized, and in particular, the height of the secondary blade 15 protruding from the side surface of the blade body is gradually increased from one end to the other end towards the grinding tooth to form a structure similar to a wedge shape, so that the possible material retention/entanglement of the secondary blade at the protruding part of the side surface is reduced. Specifically, the included angle between the side where the grinding auxiliary teeth are located and the sheet-shaped side of the blade main body is 5-20 degrees.

Further, as shown in fig. 12 to 16, in another embodiment, there is provided a knife roll for a granulator based on the above blade structure 1, comprising a cylindrical roll body 2, a shaft hole 3 penetrating through the shaft part of the roll body, a plurality of circumferentially uniformly distributed mounting through grooves 4 formed on the circumferential side of the roll body, a plurality of the above blade structures 1 clamped side by side in the mounting through grooves, spacers 5 installed in the mounting through grooves and spacing the adjacent blade structures apart, and a seal block 6 fixedly connected to the roll body at the ends of the mounting through grooves, wherein the connecting parts of the blade structures are clamped in the mounting through grooves with the grinding teeth facing the rotation direction of the roll body, and the cross-sectional shape of the mounting through grooves matches with the shape of the connecting parts. In the embodiment, the number of the mounting through grooves is 6, 25-35 blade structures can be arranged in each mounting through groove, and the number of the blade structures in each mounting through groove is equal; the blade main part flushes with the roller body rotating disc, and the parallel cutting crushing structure formed in this way rotates at a high speed in the processing station to continuously cut and crush the materials, so that the materials meeting the requirements can be discharged from the lower screen. Compared with the conventional crushing structure and mode, the specially designed blade structure can utilize the sheet end face of the blade main body to collide with materials in high-speed rotation, and utilizes the grinding teeth, close to the outer arc, of the blade main body to match with the grinding teeth to grind and cut the materials, so that a composite crushing mode for the materials is formed, and the obtained crushing effect is better.

In application, a rotating shaft 7 is fixedly connected with the shaft hole of the roller body in a penetrating mode, bearing blocks 8 are arranged on the rotating shaft corresponding to two ends of the roller body and used for being connected with an external machine body, and a belt wheel 9 is arranged at one end of the rotating shaft and used for introducing external power to drive, so that the whole knife roller can work and run in the particle machine body.

In another embodiment, the blade is arranged in a slightly inclined state relative to the rotating circular surface by designing the angle of the blade structure, namely: will the configuration is 5 ~ 25 contained angles of scope between the slice side of blade structure and the roll body pivoted disc, can produce axial displacement's effect to the material after so rotating, realize axial ejection of compact form from this, this kind of structural style still makes the material receive more complicated effort and produce more irregular motion thereby more do benefit to by the combined action breakage of blade in the axial displacement in-process on this basis, and the material can be broken by the repeated action of a plurality of blades of axial arrangement again in the axial displacement in-process, ideal granularity size and granularity degree are obtained more easily to such multiple action messenger's the material of being handled.

The blade inclined structure is realized by the specific structural design of a cushion block, and specifically, the cushion block 5 comprises a middle cushion block 5-1 arranged between adjacent blade structures and an end cushion block 5-2 arranged between the blade structures and a sealing block, wherein two end faces of the middle cushion block are parallel, and an included angle between the end face of the middle cushion block and a roller body rotating circular face is matched with an included angle between a sheet-shaped side face of the blade structure and the roller body rotating circular face; the included angle between the end face of the end cushion block facing the blade structure and the rotating circular face of the roller body is matched with the included angle between the sheet-shaped side face of the blade structure and the rotating circular face of the roller body, and the end face of the end cushion block facing the sealing block is parallel to the rotating circular face of the roller body.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not a limitation to the protection scope of the present invention, but all the changes made by adopting the design principle of the present invention and performing non-creative work on this basis should belong to the protection scope of the present invention.

Claims (10)

1. The utility model provides a blade structure for particle machine, its characterized in that, including one side evagination form work blade face (13) be flaky blade main part (10), a connecting portion (11) that are used for installing on particle machine of body one end of blade to and along its mill cutting tooth (12) that arrange densely along its trend on the work blade face of blade main part, wherein, the flaky thickness of blade main part is 1 ~ 5mm, the distance of any point to the same straight line of drawing by this side root of blade main part on the work blade face of blade main part is the trend of gradually increasing along work blade face trend direction from this root, the contained angle of the orientation work blade face that forms between the tangent line of any point on the work blade face of blade main part and the horizontal straight line at this work blade face root place is not less than 0.

2. The blade structure for a granulator of claim 1 wherein the connecting portion is any one of a convex rectangular shape, a concave channel shape, a convex dovetail shape, a perforated shape, and a slotted hole shape.

3. A blade construction for a granulator according to claim 1 or 2, characterized in that the plate-like side of the blade body (10) is fixedly connected with at least one secondary blade (15) on which the side remote from the blade body is densely arranged with abrasive secondary teeth (16).

4. The blade structure for a granulator according to claim 3, wherein the angle between the extension direction of the secondary blade and the direction of the circular surface of the blade body is-30 ° to 30 °.

5. The blade structure for a granulator according to claim 3, wherein the height of the secondary blade protruding from the side of the blade body increases gradually from one end toward the other end toward the grinding tooth.

6. The blade structure for the granulator according to claim 5, wherein the angle between the side surface of the grinding auxiliary tooth and the sheet-shaped side surface of the blade body is 5-20 °.

7. A knife roll for a granulator, comprising a cylindrical roll body (2), a shaft hole (3) penetrating the shaft of the roll body, a plurality of circumferentially and uniformly distributed placing through grooves (4) formed on the circumferential side of the roll body, a plurality of blade structures (1) clamped in the placing through grooves side by side according to any one of claims 1 to 6, spacers (5) mounted in the placing through grooves and spacing the adjacent blade structures apart, and a seal block (6) fixedly connected with the roll body at the end of the placing through groove, wherein the connecting part of the blade structures is clamped in the placing through grooves to enable grinding teeth to face the rotation direction of the roll body.

8. The knife roll of claim 7, wherein the cross-sectional shape of the seating channel matches the shape of the connecting portion.

9. The knife roll of claim 7, wherein the sheet-shaped side surface of the blade structure and the rotating circular surface of the roll body form an included angle of 5-25 degrees.

10. The knife roll according to claim 9, characterized in that the spacers (5) comprise a middle spacer (5-1) arranged between adjacent blade structures and end spacers (5-2) arranged between the blade structures and the seal block, wherein the middle spacer has two end faces parallel and the angle between its end face and the rotational circle of the roll body matches the angle between the sheet-like side faces of the blade structures and the rotational circle of the roll body; the included angle between the end face of the end cushion block facing the blade structure and the rotating circular face of the roller body is matched with the included angle between the sheet-shaped side face of the blade structure and the rotating circular face of the roller body, and the end face of the end cushion block facing the sealing block is parallel to the rotating circular face of the roller body.

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