阅读说明：本技术 一种圆盘干燥机的刮刀装置 (Scraper device of disc dryer ) 是由 章华熔 陈菲琳 陈晓雷 林翔 彭存 于 2019-12-03 设计创作，主要内容包括：本发明公开了一种圆盘干燥机的刮刀装置,包括第一刮刀单元,第一刮刀单元包括第一连接组件和两个第一刮刀,两第一刮刀分别与圆盘干燥机的同一圆盘的两侧接触,两第一刮刀通过第一连接组件可移动地连于圆盘干燥机的壳体,使两第一刮刀能够沿圆盘轴向相互远离和相互靠近。第一刮刀能够刮除附着在圆盘表面的物料,防止这部分物料一直附着在圆盘表面。此外,该刮刀装置还包括第二刮刀,第一刮刀刮下的物料进一步经第二刮刀搅拌破碎。第一刮刀和第二刮刀的表面均形成有对物料进行导流的导流曲面。该刮刀装置可以保证圆盘的传热效率和转动顺畅性,从而能够保证圆盘干燥机的干燥性能。(The invention discloses a scraper device of a disc dryer, which comprises a first scraper unit, wherein the first scraper unit comprises a first connecting component and two first scrapers, the two first scrapers are respectively contacted with two sides of the same disc of the disc dryer, and the two first scrapers are movably connected to a shell of the disc dryer through the first connecting component, so that the two first scrapers can be far away from and close to each other along the axial direction of the disc. The first scraper can scrape off the material attached to the surface of the disc, and the material is prevented from being attached to the surface of the disc all the time. In addition, the scraper device also comprises a second scraper, and the material scraped by the first scraper is further stirred and crushed by the second scraper. The surfaces of the first scraper and the second scraper are both formed with flow guide curved surfaces for guiding materials. The scraper device can ensure the heat transfer efficiency and the rotation smoothness of the disc, so that the drying performance of the disc dryer can be ensured.)

1. The scraper device of the disc dryer is characterized in that the scraper device comprises a first scraper unit (1), the first scraper unit (1) comprises a first connecting component (12) and two first scrapers (11), the two first scrapers (11) are respectively contacted with two sides of the same disc (02) of the disc dryer, the two first scrapers (11) are movably connected to a shell (01) of the disc dryer through the first connecting component (12), and the two first scrapers (11) can be far away from each other and close to each other along the axial direction of the disc.

2. The scraper device according to claim 1, characterized in that the first connecting assembly (12) comprises a first connecting plate (121), a spring baffle (122), a spring (124) and a first bolt (123), the first connecting plate (121) is fixed to a casing (01) of the disc dryer, the spring baffle (122) is arranged at a distance from the first connecting plate (121), one end of the two first scrapers (11) extends between the spring baffle (122) and the first connecting plate (121), the first bolt (123) is screwed to the first connecting plate (121) after passing through the spring baffle (122) and the two first scrapers (11) along the axial direction of the disc, the first bolt (123) is sleeved with two springs (124), one spring (124) is pre-compressed between the spring baffle (122) and one first scraper (11), the other spring (124) is pre-compressed between the first connecting plate (121) and the other first blade (11).

3. A doctor apparatus according to claim 2, characterized in that each spring (124) is peripherally provided with an elastic sleeve to prevent the spring (124) from material erosion.

4. The doctor apparatus according to claim 1, characterized in that the first doctor blade (11) surface forms a first flow guiding curved surface (11a), each disc corresponds to a first doctor blade unit (1), two first doctor blades (11) are arranged in the disc space between adjacent discs, the first flow guiding curved surfaces (11a) of two first doctor blades (11) in the same disc space face each other and form a first flow passing area (31), and the width of the first flow passing area (31) along the disc axial direction gradually decreases along the disc rotation direction.

5. Doctor blade arrangement according to claim 4, characterised in that the first doctor blade (11) is in line contact with the disc with one side edge of the first flow guiding curve (11a), which one side edge of the first flow guiding curve (11a) is in full abutment with the disc.

6. A doctor apparatus according to any of claims 1-5, characterized in that the doctor apparatus further comprises a second doctor unit (2), which second doctor unit (2) comprises a second connecting assembly (22) and a second doctor blade (21), which second doctor blade (21) is fixed to the housing (01) of the disc dryer by means of the second connecting assembly (22), which second doctor blade (21) is arranged between adjacent discs (02) of the disc dryer, which second doctor blade (21) is not in contact with the discs.

7. The doctor apparatus as claimed in claim 6, characterised in that the surface of the second doctor blade (21) forms a second flow guiding curved surface (21a) and a third flow guiding curved surface (21b), the second flow guiding curved surface (21a) and the third flow guiding curved surface (21b) respectively facing two adjacent discs, a second flow passing area (32) is formed between the second flow guiding curved surface (21a) and the facing discs, a third flow passing area (33) is formed between the third flow guiding curved surface (21b) and the facing discs, and the width of the second flow passing area (32) in the axial direction of the discs and the width of the third flow passing area (33) in the axial direction of the discs are both gradually reduced in the rotational direction of the discs.

8. Doctor apparatus according to claim 7, characterised in that the second flow-guiding curved surface (21a) and the third flow-guiding curved surface (21b) intersect at a location forming a ridge (21c), which ridge (21c) lies on a bisecting plane (S2), which bisecting plane (S2) is perpendicular to the disc axis and bisects the disc space between adjacent discs.

9. Doctor apparatus according to claim 6, characterised in that the angle α between the direction of extension of the first doctor blade (11) and the vertical (S1) is in the range 25 ° ≦ α ≦ 35 °, the angle β between the direction of extension of the second doctor blade (21) and the vertical (S1) is in the range 40 ° ≦ β ≦ 50 °, the difference between β and α is in the range 10 ° ≦ β - α ≦ 20 °, and the vertical (S1) axially coincides with the disc.

10. A doctor arrangement according to claim 6, characterized in that the disc surface of the disc dryer is a carburized surface, as are the surfaces of the first doctor (11) and the second doctor (21).

Technical Field

The invention relates to the technical field of material drying, in particular to a disc dryer and a scraper device thereof.

Background

Disc dryers are common devices for drying materials. The disc dryer comprises a shell, wherein a plurality of discs are sequentially arranged inside the shell at intervals along the axial direction, a plurality of scrapers are further arranged inside the shell, and each scraper is fixed on the shell and is respectively arranged in a disc interval between every two adjacent discs.

The disc desiccator during operation, treat that dry material gets into inside the casing and depends on the disc surface, to the disc heat supply, the heat transmits for the material of depending on it from the disc surface, and the disc rotates around the axial, makes the rotatory mummification dehydration of material of depending on the disc surface, and during, the scraper loosens and strikes off the material between the adjacent disc.

Disclosure of Invention

In order to solve the above technical problem, the present invention provides a scraper device of a disc dryer, the scraper device including a first scraper unit, the first scraper unit including a first connecting assembly and two first scrapers, the two first scrapers respectively contacting both sides of a same disc of the disc dryer, the two first scrapers being movably connected to a casing of the disc dryer through the first connecting assembly, so that the two first scrapers can move away from and approach each other along an axial direction of the disc.

When the disc dryer works, the disc rotates around the axial direction, the first scraper does not rotate, the disc and the first scraper generate relative displacement along the circumferential direction, and materials attached to the surface of the disc can be scraped due to the contact of the first scraper and the disc, so that the parts of materials are prevented from being attached to the surface of the disc all the time, and the heat transfer efficiency of the disc and the drying performance of the disc dryer are ensured. And because two first scrapers can be kept away from each other along the disc axial, so when the disc is heated and expanded, the disc can not be caused to contact with the first scrapers too tightly, thereby ensuring that the disc rotates smoothly. Because two first scrapers can be close to each other along the disc axial, so when the disc shrinkage, can not cause disc and first scraper to break away from the contact to guarantee that the material of adhering to on disc surface can effectively be scraped off.

As above scraper device, first connecting element includes first connecting plate, spring baffle, spring and first bolt, first connecting plate is fixed in disc dryer's casing, spring baffle with first connecting plate interval arrangement, two the one end of first scraper is stretched spring baffle with between the first connecting plate, first bolt passes along the disc axial spring baffle and two twist behind the first scraper and admittedly in first connecting plate, first bolt periphery cover is equipped with two the spring, one the spring precompression in spring baffle and one between the first scraper, another the spring precompression in first connecting plate and another between the first scraper.

According to the scraper device, the periphery of each spring is sleeved with the elastic sleeve to prevent the springs from being corroded by materials.

According to the scraper device, the first flow guiding curved surfaces are formed on the surfaces of the first scrapers, each disc corresponds to one first scraper unit, two first scrapers are arranged in the disc space between the adjacent discs, the first flow guiding curved surfaces of the two first scrapers positioned in the same disc space face each other and form a first flow passing area therebetween, and the width of the first flow passing area along the axial direction of the discs is gradually reduced along the rotation direction of the discs.

According to the scraper device, one side edge of the first flow guiding curved surface of the first scraper is in line contact with the disc, and the one side edge of the first flow guiding curved surface is completely attached to the disc.

The scraper device as described above, further comprising a second scraper unit, the second scraper unit comprising a second connecting assembly and a second scraper, the second scraper being fixed to the housing of the disc dryer by the second connecting assembly, the second scraper being arranged between adjacent discs of the disc dryer, the second scraper not being in contact with the discs.

According to the scraper device, the second flow guiding curved surface and the third flow guiding curved surface are formed on the surface of the second scraper, the second flow guiding curved surface and the third flow guiding curved surface respectively face two adjacent disks, a second overflowing area is formed between the second flow guiding curved surface and the facing disks, a third overflowing area is formed between the third flow guiding curved surface and the facing disks, and the width of the second overflowing area along the axial direction of the disks and the width of the third overflowing area along the axial direction of the disks are gradually reduced along the rotation direction of the disks.

According to the scraper device, the second flow guiding curved surface is intersected with the second flow guiding curved surface, a convex edge is formed at the intersection position, the convex edge is positioned on the bisection surface, and the bisection surface is perpendicular to the axial direction of the disks and bisects the disk interval between the adjacent disks.

In the scraper device, the included angle α between the extending direction of the first scraper and the vertical surface ranges from 25 degrees to α degrees and from 35 degrees, the included angle β between the extending direction of the second scraper and the vertical surface ranges from 40 degrees to β degrees to 50 degrees, the difference value between β and α ranges from 10 degrees to β degrees to α degrees to 20 degrees, and the vertical surface is axially overlapped with the disk.

In the above-described doctor apparatus, the surface of the disk dryer is a carburized surface, and the surface of the first doctor blade and the surface of the second doctor blade are also carburized surfaces.

Drawings

FIG. 1 is a perspective view of a partial structure of a scraper device of a disc dryer according to an embodiment of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a perspective view of a portion of the construction of the doctor apparatus shown in FIG. 1;

fig. 4 is a perspective view of the first blade unit;

FIG. 5 is a view showing a positional relationship between the first blade unit and the disk;

FIG. 6 is a view showing a positional relationship between the second blade unit and the disk;

fig. 7 is a view from a-a of fig. 2.

The reference numerals are explained below:

01 shell, 02 disc;

1a first scraper unit, 11a first scraper, 11a first flow guiding curved surface, 11b one side edge of the first flow guiding curved surface, 12 a first connecting component, 121 a first connecting plate, 122 a spring baffle, 123 a first bolt and 124 a spring;

2 second scraper unit, 21 second scraper, 21a second flow guiding curved surface, 21b third flow guiding curved surface, 21c rib, 22 second connecting assembly, 221 second connecting plate, 222 second bolt.

31 a first overcurrent region, 32 a second overcurrent region and 33 a third overcurrent region.

The vertical plane of S1, the bisection plane of S2.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.

As shown in fig. 1 to 3, the scraper device comprises a first scraper unit 1, the first scraper unit 1 comprises a first connecting assembly 12 and two first scrapers 11, and the two first scrapers 11 are movably connected to a housing 01 of the disc dryer through the first connecting assembly 12, so that the two first scrapers 11 can move away from and approach each other along the axial direction of the disc. The two first scrapers 11 of the first scraper unit 1 are respectively in contact with both sides of the same disc 02 of the disc dryer.

When the disc dryer works, the disc rotates around the axial direction, the first scraper 11 does not rotate, the disc and the first scraper 11 generate relative displacement along the circumferential direction, and the first scraper 11 is in contact with the disc, so that materials attached to the surface of the disc can be scraped, the materials are prevented from being attached to the surface of the disc all the time, and the heat transfer efficiency of the disc and the drying performance of the disc dryer are guaranteed.

Moreover, the two first scrapers 11 can be far away from each other along the axial direction of the disc, so that when the disc expands due to heating, the disc is not in over-tight contact with the first scrapers 11, and the smooth rotation of the disc is ensured. Because two first scrapers 11 can be close to each other along the disc axial, so when the disc contracts with cold, can not cause the disc and first scraper 11 to break away from contact to guarantee that the material that adheres to the disc surface can be effectively scraped off.

Specifically, as shown in fig. 3, the first connection assembly 12 includes a first connection plate 121, a spring stopper 122, a spring 124, and a first bolt 123. The first connecting plate 121 is fixed to the casing 01 of the disc dryer, the spring baffle 122 and the first connecting plate 121 are arranged at intervals, one ends of the two first scrapers 11 extend between the spring baffle 122 and the first connecting plate 121, and the first bolt 123 penetrates through the spring baffle 122 and the two first scrapers 11 along the axial direction of the disc and then is screwed to the first connecting plate 121. The first bolt 123 is circumferentially sleeved with two springs 124, one spring 124 is pre-compressed between the spring retainer 122 and one first blade 11, and the other spring 124 is pre-compressed between the first connecting plate 121 and the other first blade 11, as understood in connection with fig. 4, in which two first bolts 123 are provided.

More specifically, each spring 124 is sleeved with an elastic sleeve (not shown), so that the problem that the spring 124 is corroded by the material to cause the material to be stuck and lose elasticity can be prevented.

In the first connecting assembly 12 with the above structure, when the disc expands due to heating, the disc presses against the first scrapers 11 on both sides, and the two first scrapers 11 move back to back against the elastic force of the spring 124 under the pressing action of the disc, so as to be away from each other. When the disk shrinks, the first scrapers 11 move toward each other by the elastic force of the springs 124. Such a first connecting assembly 12 is simple in structure, easy to arrange, and, at a later stage, easy to replace the first scraper 11 and the spring 124, and can ensure that the first scraper 11 is always in close contact with the disc. The structure can overcome the displacement generated by expansion with heat and contraction with cold of each disc and can also overcome the displacement generated by expansion with heat and contraction with cold of the disc rotating shaft.

Of course, in practical implementation, the structure of the first connecting assembly 12 is not limited to the above structure, and other structures that can connect the first scraper 11 and the housing 01 and do not affect the movement of the first scraper 11 in the axial direction of the disk may be used.

In particular, the number of first blade units 1 is not less than the number of discs, so that each disc corresponds to a first blade unit 1. When each disk corresponds to one first scraper unit 1, two first scrapers 11 are arranged in the disk interval between every two adjacent disks, and it can be understood that two first scrapers 11 located in the same disk interval belong to different first scraper units 1 respectively.

Preferably, as shown in fig. 4, the first scraper 11 has a first curved guide surface 11a on its surface. As shown in fig. 7, the first flow guiding curved surfaces 11a of the two first scrapers 11 located in the same disc space face each other, and a first flow passing region 31 is formed between the first flow guiding curved surfaces 11a of the two first scrapers 11 located in the same disc space, and a width of the first flow passing region 31 in the disc axial direction (a distance between the two first flow guiding curved surfaces 11a in the up-down direction in fig. 7) is gradually reduced along the disc rotation direction (from front to back in fig. 7). In this way, when the material scraped by the first scraper 11 flows through the first flow passing region 31, the material gradually gathers to the middle of the interval between the disks under the guiding action of the two first flow guiding curved surfaces 11a, so that the scraped material can be prevented from being attached to the surfaces of the disks again, and the rotation resistance of the disks can be reduced by arranging the first flow guiding curved surfaces 11a

Preferably, the first scraper 11 is in line contact with the disc, so that the first scraper 11 scrapes materials well and is not worn out quickly. In the specific embodiment, as shown in fig. 4, 5 and 7, the first scraper 11 is in line contact with the disc with one side edge 11b (the foremost side edge in fig. 7) of the first guiding curved surface 11a, and the foremost side edge of the first guiding curved surface 11a completely fits the disc surface (as shown in fig. 5), which is beneficial to ensuring the scraping effect.

Further, as shown in fig. 1 to 3, the scraper device further includes a second scraper unit 2, the second scraper unit 2 includes a second connecting assembly 22 and a second scraper 21, and the second scraper 21 is fixed to the housing 01 of the disc dryer through the second connecting assembly 22.

Specifically, as shown in fig. 3, the second connecting assembly 22 includes a second connecting plate 221 and a second bolt 222, the second connecting plate 222 is fixed to the housing 01, the second bolt 222 passes through one end of the second scraper and then is screwed to the second connecting plate 221, and the second connecting assembly 22 with such a structure facilitates the later replacement of the second scraper 21. Of course, in practice, the structure of the second connecting member 22 is not limited thereto.

Specifically, as shown in fig. 6, the second blade 21 is disposed between adjacent disks of the disk dryer, and the second blade 21 is not in contact with the disks. In particular, the number of the second scraper units is not less than the number of the discs, so that one second scraper unit 2 is arranged in each disc space between every two adjacent discs.

When the disc dryer works, the disc rotates around the axial direction, the second scraper 21 does not rotate, the disc and the second scraper 21 generate relative displacement along the circumferential direction, therefore, materials scraped by the first scraper 11 are stirred and crushed by the second scraper 21, and under the matching action of the first scraper 11 and the second scraper 21, the materials are quickly dried, so that the parts of the materials can be further prevented from being attached to the surface of the disc again, and the heat transfer efficiency of the disc and the drying performance of the disc dryer are further ensured.

Specifically, as shown in fig. 3, the surface of the second scraper 21 forms a second flow guiding curved surface 21a and a third flow guiding curved surface 21 b.

As shown in fig. 7, the second curved guide surface 21a and the third curved guide surface 21b face the two adjacent disks. A second flow passing area 32 is formed between the second flow guiding curved surface 21a and the facing disk, and the width of the second flow passing area 32 along the axial direction of the disk (the distance between the second flow guiding curved surface 21a and the disk along the up-down direction in fig. 7) is gradually reduced along the rotation direction of the disk (from front to back in fig. 7). A third flow passing area 33 is formed between the third flow guiding curved surface 21b and the facing disk, and the width of the third flow passing area 33 along the axial direction of the disk (the distance between the third flow guiding curved surface 21b and the disk along the up-down direction in fig. 7) is gradually reduced along the rotation direction of the disk (from front to back in fig. 7). With this arrangement, when the material flows through the second scraper 21, the material flows in two paths under the guiding action of the second flow guiding curved surface 21a and the third flow guiding curved surface 21b, so that the material can be prevented from being blocked at the position where the second scraper 21 is arranged, and the rotational resistance of the disc can be further reduced by providing the second flow guiding curved surface 21a and the third flow guiding curved surface 21 b. In a specific embodiment, as shown in fig. 6 and 7, one side edge (the foremost edge in fig. 7) of the second flow guiding curved surface 21a and one side edge (the foremost edge in fig. 7) of the third flow guiding curved surface 21b intersect each other at a position where they form a rib 21c, which is located on a bisecting plane S2 that is perpendicular to the axial direction of the disks and bisects the disk space between the adjacent disks. By the arrangement, the stirring and crushing effects of the second scraper 21 on the materials are promoted.

Preferably, as shown in FIG. 2, the included angle α between the extending direction of the first scraper 11 and the vertical surface S1 is within the range of 25 degrees to α degrees and 35 degrees, the included angle β between the extending direction of the second scraper 21 and the vertical surface S1 is within the range of 40 degrees to β degrees and 50 degrees, the vertical surface S1 is parallel to the axial direction of the disk, and the difference between β and α is within the range of 10 degrees to β degrees to α degrees and 20 degrees, so that the matching effect of the first scraper 11 and the second scraper 21 is good.

Preferably, the surface of the first blade 11, the surface of the second blade 21 (including the second and third flow guiding curved surfaces 21a and 21b), and the surface of the disk are carburized to improve wear resistance.

The scraper device of the disc dryer provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.