阅读说明：本技术 一种具有亲疏水间隔表面结构的制革转鼓 (Tanning rotary drum with hydrophilic and hydrophobic spaced surface structure ) 是由 王亚楠 江卓成 谢果 曾运航 林怡瑞 吴章林 周建飞 于 2021-07-06 设计创作，主要内容包括：本发明实施例公开了一种具有亲疏水间隔表面结构的制革转鼓,涉及制革行业技术领域,该转鼓包括可沿自身周向旋转的鼓体,设置于所述鼓体内部的搅拌结构,以及具有亲水性材料表面和疏水性材料表面间隔分布的亲疏水间隔表面结构,所述亲疏水间隔表面结构分布于所述鼓体内壁面和/或所述搅拌结构表面；其中,在所述鼓体转动过程中,所述亲疏水间隔表面结构往复地进入和离开所述鼓体内的浴液。如此本发明实施例可以改变鼓体内壁表面和/或搅拌结构表面的润湿行为,间接调节鼓体内壁和/或搅拌结构与皮革之间的表面作用力,从而达到优化制革过程的增益效果。(The embodiment of the invention discloses a tanning drum with hydrophilic and hydrophobic spaced surface structures, which relates to the technical field of tanning industry, and comprises a drum body capable of rotating along the circumferential direction of the drum body, a stirring structure arranged in the drum body, and the hydrophilic and hydrophobic spaced surface structures with hydrophilic material surfaces and hydrophobic material surfaces distributed at intervals, wherein the hydrophilic and hydrophobic spaced surface structures are distributed on the inner wall surface of the drum body and/or the surface of the stirring structure; wherein the hydrophilic-hydrophobic spacing surface structures reciprocally enter and exit the bath within the drum body during rotation of the drum body. Therefore, the embodiment of the invention can change the wetting behavior of the inner wall surface of the drum body and/or the surface of the stirring structure, and indirectly adjust the surface acting force between the inner wall of the drum body and/or the stirring structure and the leather, thereby achieving the effect of optimizing the gain of the leather making process.)

1. A tanning drum with hydrophilic-hydrophobic spaced surface structures (3), characterized in that it comprises:

a drum body (1) which can rotate along the circumferential direction of the drum body;

the stirring structure (2) is arranged in the drum body (1); and

hydrophilic and hydrophobic spaced surface structures (3) which are distributed at intervals on the surface (31) of a hydrophilic material and the surface (32) of a hydrophobic material, wherein the hydrophilic and hydrophobic spaced surface structures (3) are distributed on the inner wall surface of the drum body (1) and/or the surface of the stirring structure (2);

wherein the hydrophilic-hydrophobic spacing surface structures (3) reciprocally enter and exit the bath liquid inside the drum body (1) during rotation of the drum body (1).

2. Leather-making drum according to claim 1, wherein said hydrophilic-hydrophobic spaced-apart surface structures (3) are structures of a hydrophilic coating spaced apart from a hydrophobic coating, wherein:

the hydrophilic coating is the surface (31) of the hydrophilic material, and is formed by preparing the hydrophilic material on the inner wall surface of the drum body (1) and/or the surface of the stirring structure (2);

the hydrophobic coating is the surface (32) of the hydrophobic material, and the hydrophobic coating is formed by preparing the hydrophobic material on the inner wall surface of the drum body (1) and/or the surface of the stirring structure (2).

3. Leather-making drum according to claim 1, wherein said hydrophilic-hydrophobic spacing surface structures (3) are structures of which a hydrophilic coating is spaced from the inner wall of said drum body (1) and/or from the polished original surface of said agitating structure (2), wherein:

the hydrophilic coating is the surface (31) of the hydrophilic material, and is formed by preparing the hydrophilic material on the inner wall surface of the drum body (1) and/or the surface of the stirring structure (2);

the polished original surface of the inner wall of the drum body (1) and/or the stirring structure (2) is the hydrophobic material surface (32).

4. The tanning drum as claimed in claim 1, wherein said hydrophilic-hydrophobic spaced surface structures (3) are structures of a plurality of modular hydrophilic-hydrophobic sheets spliced together, wherein:

the outer surface of each hydrophilic and hydrophobic sheet is a surface formed by the hydrophilic material surface (31) and the hydrophobic material surface (32) which are distributed at intervals, and the hydrophilic and hydrophobic sheets are tightly attached to the inner wall surface of the drum body (1) and/or the surface of the stirring structure (2) for installation.

5. Leather-making drum according to claim 1, wherein said hydrophilic-hydrophobic spaced-apart surface structures (3) are structures of modular hydrophilic flakes spaced apart from a hydrophobic coating, wherein:

the outer surface of the hydrophilic sheet is the surface (31) of the hydrophilic material, and the hydrophilic sheet is tightly attached to the inner wall surface of the drum body (1) and/or the surface of the stirring structure (2) for installation;

the hydrophobic coating is the surface (32) of the hydrophobic material, and the hydrophobic coating is formed by preparing the hydrophobic material on the inner wall surface of the drum body (1) and/or the surface of the stirring structure (2).

6. Leather-making drum according to claim 1, characterized in that said hydrophilic-hydrophobic spacing surface structures (3) are structures of modular hydrophilic sheets spaced from the inner wall of said drum body (1) and/or from the polished original surface of said stirring structure (2), wherein:

the outer surface of the hydrophilic sheet is the surface (31) of the hydrophilic material, and the hydrophilic sheet is tightly attached to the inner wall surface of the drum body (1) and/or the surface of the stirring structure (2) for installation;

the polished original surface of the inner wall of the drum body (1) and/or the stirring structure (2) is the hydrophobic material surface (32).

7. Leather-making drum according to claim 1, wherein said hydrophilic-hydrophobic spacing surface structures (3) are structures of a hydrophilic coating spaced apart from modular hydrophobic flakes, wherein:

the hydrophilic coating is the surface (31) of the hydrophilic material, and is formed by preparing the hydrophilic material on the inner wall surface of the drum body (1) and/or the surface of the stirring structure (2);

the outer surface of the hydrophobic sheet is the surface (32) of the hydrophobic material, and the hydrophobic sheet is tightly attached to the inner wall surface of the drum body (1) and/or the surface of the stirring structure (2).

8. Leather-making drum according to claim 1, wherein said hydrophilic-hydrophobic spacer surface structures (3) are structures of modular hydrophilic flakes spaced apart from modular hydrophobic flakes, wherein:

the outer surface of the hydrophilic sheet is the surface (31) of the hydrophilic material, and the hydrophilic sheet is tightly attached to the inner wall surface of the drum body (1) and/or the surface of the stirring structure (2) for installation;

the outer surface of the hydrophobic sheet is the surface (32) of the hydrophobic material, and the hydrophobic sheet is tightly attached to the inner wall surface of the drum body (1) and/or the surface of the stirring structure (2).

9. Tanning drum according to any one of claims 1-8, characterized in that the stirring structure (2) comprises baffles (21) and/or studs (22), said baffles (21) and/or studs (22) reciprocally entering and leaving the bath inside the drum body (1) during the rotation of the drum body (1).

10. Tanning drum according to claim 9, characterized in that, in the case where the stirring structure (2) comprises both baffles (21) and studs (22), said baffles (21) and studs (22) are spaced apart along the circumferential wall of the drum body (1).

Technical Field

The invention relates to the technical field of leather making industry, in particular to a leather making rotary drum with a hydrophilic and hydrophobic spaced surface structure.

Background

Tanning refers to the process of tanning hides into leather. Removing hair and non-collagen fibers, loosening, fixing and strengthening collagen fibers in dermis, and performing a series of chemical (including biochemical) and mechanical treatments such as finishing. The leather-making process is generally divided into four stages of preparation, tanning, wet dyeing and finishing and dry finishing. The most used equipment in the leather making process is a rotary drum, the procedures of soaking, liming, unhairing, softening, pickling, tanning, dyeing, greasing and the like are all finished in the rotary drum, and the uniform penetration of various chemical materials is promoted through the mechanical action of the rotary drum to finish the chemical action of the preparation on leather.

In the current tanning process, the absolute processing time of the leather in the rotary drum accounts for more than 80% of the whole tanning machining. The existing improvement scheme aiming at the tanning rotary drum mainly aims at improving the internal stirring structure or the running environment of the rotary drum. Although the mechanical action can be enhanced to a certain extent by increasing the rotating speed of the rotary drum or increasing the number of the stirring structures, so that the tanning efficiency is improved and the processing time is shortened, the excessively strong mechanical action can cause the excessive dispersion of leather fibers, the great reduction of physical and mechanical properties and higher energy consumption. In summary, there are two main disadvantages. On one hand, in the rising process of the leather, the stirring structure has no effect of strengthening mass transfer on the surface of the leather; on the other hand, the stirring effect of the stirring structure on bath liquid is insufficient, so that the mechanical effect and the mass transfer effect in the tanning process are weak, the time consumption of tanning production is long, and the energy consumption is large.

Therefore, in the current drum design, the tanning effect and efficiency are difficult to be considered simultaneously.

Disclosure of Invention

The embodiment of the invention provides a tanning drum with a hydrophilic and hydrophobic spaced surface structure, which can realize a more efficient tanning process without reducing the quality of leather, and save time and cost so as to overcome the problems.

In order to solve the above problems, the embodiment of the present invention discloses a tanning drum with a hydrophilic and hydrophobic spaced surface structure, comprising:

a drum body which can rotate along the circumferential direction of the drum body;

the stirring structure is arranged in the drum body; and

hydrophilic and hydrophobic spaced surface structures which are distributed on the surface of the hydrophilic material and the surface of the hydrophobic material at intervals, wherein the hydrophilic and hydrophobic spaced surface structures are distributed on the inner wall surface of the drum body and/or the surface of the stirring structure;

wherein the hydrophilic-hydrophobic spacing surface structures reciprocally enter and exit the bath within the drum body during rotation of the drum body.

Optionally, the hydrophilic-hydrophobic spacing surface structure is a structure in which a hydrophilic coating and a hydrophobic coating are distributed at intervals, wherein:

the hydrophilic coating is the surface of the hydrophilic material, and is formed by preparing the hydrophilic material on the inner wall surface of the drum body and/or the surface of the stirring structure;

the hydrophobic coating is the surface of the hydrophobic material, and the hydrophobic coating is formed by preparing the hydrophobic material on the inner wall surface of the drum body and/or the surface of the stirring structure.

Optionally, the hydrophilic-hydrophobic spacing surface structure is a structure in which a hydrophilic coating is spaced from the polished original surface of the drum inner wall and/or the stirring structure, wherein:

the hydrophilic coating is the surface of the hydrophilic material, and is formed by preparing the hydrophilic material on the inner wall surface of the drum body and/or the surface of the stirring structure;

the polished original surface of the inner wall of the drum body and/or the stirring structure is the surface of the hydrophobic material.

Optionally, the hydrophilic-hydrophobic spacing surface structure is formed by splicing a plurality of modularized hydrophilic-hydrophobic sheets, wherein:

the outer surface of each hydrophilic and hydrophobic sheet is a surface of the hydrophilic material and a surface of the hydrophobic material which are distributed at intervals, and the hydrophilic and hydrophobic sheets are tightly attached to the inner wall surface of the drum body and/or the surface of the stirring structure for installation.

Optionally, the hydrophilic-hydrophobic spacing surface structure is a structure in which a modularized hydrophilic sheet and a hydrophobic coating are spaced apart, wherein:

the outer surface of the hydrophilic sheet is the surface of the hydrophilic material, and the hydrophilic sheet is tightly attached to the inner wall surface of the drum body and/or the surface of the stirring structure for installation;

the hydrophobic coating is the surface of the hydrophobic material, and the hydrophobic coating is formed by preparing the hydrophobic material on the inner wall surface of the drum body and/or the surface of the stirring structure.

Optionally, the hydrophilic-hydrophobic spacing surface structure is a structure in which a modular hydrophilic sheet is spaced from the polished original surface of the drum inner wall and/or the stirring structure, wherein:

the outer surface of the hydrophilic sheet is the surface of the hydrophilic material, and the hydrophilic sheet is tightly attached to the inner wall surface of the drum body and/or the surface of the stirring structure for installation;

the polished original surface of the inner wall of the drum body and/or the stirring structure is the surface of the hydrophobic material.

Optionally, the hydrophilic-hydrophobic spacing surface structure is a structure in which the hydrophilic coating and the modular hydrophobic sheet are distributed at intervals, wherein:

the hydrophilic coating is the surface of the hydrophilic material, and is formed by preparing the hydrophilic material on the inner wall surface of the drum body and/or the surface of the stirring structure;

the outer surface of the hydrophobic sheet is the surface of the hydrophobic material, and the hydrophobic sheet is tightly attached to the inner wall surface of the drum body and/or the surface of the stirring structure.

Optionally, the hydrophilic-hydrophobic spacing surface structure is a structure in which a modular hydrophilic sheet and a modular hydrophobic sheet are distributed at intervals, wherein:

the outer surface of the hydrophilic sheet is the surface of the hydrophilic material, and the hydrophilic sheet is tightly attached to the inner wall surface of the drum body and/or the surface of the stirring structure for installation;

the outer surface of the hydrophobic sheet is the surface of the hydrophobic material, and the hydrophobic sheet is tightly attached to the inner wall surface of the drum body and/or the surface of the stirring structure.

Optionally, the agitating structure comprises baffles and/or protruding pegs that reciprocate into and out of the bath in the drum body during rotation of the drum body.

Optionally, in a case that the stirring structure includes both the baffle and the protruding piles, the baffle and the protruding piles are distributed at intervals along the circumferential wall surface of the drum body.

The embodiment of the invention has the following advantages:

the tanning drum comprises a drum body capable of rotating along the circumferential direction of the tanning drum, a stirring structure arranged in the drum body and hydrophilic and hydrophobic spaced surface structures with hydrophilic material surfaces and hydrophobic material surfaces distributed at intervals, wherein the hydrophilic and hydrophobic spaced surface structures are distributed on the inner wall surface of the drum body and/or the surface of the stirring structure; in the rotating process of the drum body, the hydrophilic and hydrophobic surface structure is arranged to enter and leave the bath liquid in the drum body in a reciprocating mode, so that the wetting behavior of the inner wall surface of the drum body and/or the surface of the stirring structure can be changed, the surface acting force between the inner wall of the drum body and/or the stirring structure and leather can be indirectly adjusted, and the gain effect of the leather making process can be optimized. Particularly, the invention can increase the effective action area during the tanning and prolong the relative tanning time on one hand, realize more efficient tanning process and save time and cost while not reducing the leather quality; on the other hand, in the process of leather making by rotating the drum body, when the inner wall surface of the drum body and/or the surface of the stirring structure provided with the hydrophilic and hydrophobic interval surface structures enter and leave the bath liquid along with the rotation of the rotary drum, the stirring effect of the inner wall surface of the drum body and/or the stirring structure on the bath liquid can be enhanced, so that the bath liquid flow on the surface of the leather is accelerated, the permeation mass transfer effect of chemicals to the interior of the leather is promoted, and the acting time is shortened.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of the overall structure of a tanning drum having a hydrophilic-hydrophobic spaced surface structure according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a drum body provided with both baffles and protruding piles on the circumferential inner wall thereof according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of the hydrophilic and hydrophobic surface structures distributed only on the inner wall surface of the drum body according to the embodiment of the present invention;

FIG. 4 is a schematic structural diagram of the structure of the hydrophilic and hydrophobic partition surface distributed on the inner wall surface of the drum body and the surface of the stirring structure at the same time in the embodiment of the present invention;

FIGS. 5(a) and 5(b) are schematic diagrams illustrating the principle of the gain of the baffle plate and the protruding pillars from the bath with the hydrophilic and hydrophobic spacing surface structures according to an embodiment of the present invention;

FIGS. 6(a) and 6(b) are schematic diagrams illustrating the gain of a baffle plate with a hydrophilic and hydrophobic spacing surface structure and a convex pile entering a bath solution according to an embodiment of the invention;

FIGS. 7(a) and 7(b) are schematic structural diagrams of a hydrophilic coating and a hydrophobic coating spaced on the surfaces of the studs and the baffles, respectively, according to an embodiment of the present invention;

FIGS. 8(a) to 8(g) are schematic views of the hydrophilic and hydrophobic flakes having different patterns on the surface of the hydrophilic material and the surface of the hydrophobic material according to the embodiment of the present invention;

FIGS. 9(a) and 9(b) are schematic structural views of hydrophilic and hydrophobic sheets arranged on the surfaces of the convex piles and the baffle plates respectively according to an embodiment of the present invention;

fig. 10(a) to 10(g) are schematic structural views respectively showing the hydrophilic coating and the hydrophobic coating disposed on the surface of the baffle plate at different pattern intervals according to the embodiment of the present invention.

Description of reference numerals:

1-drum body; 2-stirring structure, 21-baffle plate, 22-convex pile; 3-hydrophilic and hydrophobic spaced surface structure, 31-hydrophilic material surface, 32-hydrophobic material surface; 4-a drum hoop; 5-connecting a retaining ring; 6-a support frame; 7-a bearing; 8-drum spindle; 9-reinforcing the bottom plate; 10-drum base plate; 11-drum door.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Aiming at the technical problem of the invention, the invention provides a tanning drum with a hydrophilic and hydrophobic spaced surface structure, the hydrophilic and hydrophobic surface spacing structure 3 is distributed on the inner wall surface of the drum body 1 of the tanning rotary drum and/or the surface of the stirring structure 2 thereof, wherein, the hydrophilic material surface 31 in the hydrophilic-hydrophobic interval surface structure 3 can increase the adhesion force to the liquid drop, and the hydrophobic material surface 32 can increase the driving force for the liquid drop aggregation and promote more liquid drops to move to the hydrophilic material surface 31, but the invention does not directly utilize the hydrophilic-hydrophobic surface to simply change the characteristics of the fluid, but indirectly adjust the surface acting force between the inner wall of the drum body 1 and/or the stirring structure 2 and the leather by changing the wetting behavior of the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2, thereby achieving the gain effect of optimizing the leather making process. Therefore, the invention can increase the leather making area and prolong the relative leather making time on the one hand, realize more efficient leather making process and save time and cost on the other hand while not reducing the quality of the leather; on the other hand, in the rotating leather-making process of the drum body, along with the rotation of the rotary drum, the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 which are provided with the hydrophilic and hydrophobic interval surface structures 3 can pull the leather to jointly enter and leave the bath liquid, so that the stirring effect of the inner wall surface of the drum body 1 and/or the stirring structure 2 on the bath liquid is enhanced, the flow of the bath liquid on the surface of the leather is accelerated, the permeation mass transfer effect of chemicals to the interior of the leather is promoted, and the acting time is shortened.

Specifically, referring to fig. 1, an overall structure of a tanning drum having a hydrophilic-hydrophobic spaced surface structure according to an embodiment of the present invention is schematically illustrated. The tanning drum may comprise:

a drum body 1 rotatable in the circumferential direction thereof;

a stirring structure 2 arranged inside the drum body 1; and

hydrophilic and hydrophobic spaced surface structures 3 are distributed on the surface 31 of the hydrophilic material and the surface 32 of the hydrophobic material at intervals, and the hydrophilic and hydrophobic spaced surface structures 3 are distributed on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2; wherein the hydrophilic and hydrophobic spacing surface structures 3 reciprocally enter and leave the bath liquid in the drum body 1 during rotation of the drum body 1.

In the present invention, the structure of the drum body 1 that can rotate along the circumferential direction thereof and the stirring structure 2 provided inside the drum body 1 are not particularly limited, and the present invention can be used in the tanning industry and can realize at least one processing procedure of soaking, liming, unhairing, softening, pickling, tanning, dyeing, fatliquoring, and the like.

In an embodiment of the invention, the agitation structure 2 may comprise baffles 21 and/or studs 22, the baffles 21 and/or studs 22 reciprocally entering and leaving the bath inside the drum body 1 during the rotation of the drum body 1. That is, the stirring structure 2 may be only the baffle 21, or only the stud 22, or include both the baffle 21 and the stud 22. The hydrophilic and hydrophobic water intervals of the baffle plates 21 and the convex piles 22 can better pull the leather, enhance the stirring of bath lotion, and enhance the effects of impact collision, friction and kneading and the like on the leather, so that the bath lotion flow on the surface of the leather is enhanced, and the permeation and mass transfer effects of chemicals to the interior of the leather are promoted. Alternatively, as shown in fig. 1 and 2, in the case where the stirring structure 2 includes both the baffles 21 and the studs 22, the baffles 21 and the studs 22 are spaced apart from each other along the circumferential wall surface of the drum body 1. So, because of baffle 21 and protruding stake 22 along the circumferential wall interval distribution of the drum body 1, have the interact to the skin between baffle 21 and the protruding stake 22, at the drum body 1 rotation in-process, can realize rubbing, roll bending, impact collision, extrusion pulling etc. combined action to the skin.

In the present invention, the hydrophilic and hydrophobic spaced surface structure 3 can be understood as a surface having a hydrophilic material and a hydrophobic material spaced apart from each other, a contact angle of a liquid droplet at a three-phase intersection of the hydrophilic material surface 31 is less than 90 °, a contact angle of the liquid droplet at a three-phase intersection of the hydrophobic material surface 32 is greater than 90 °, and the hydrophilic and hydrophobic material spaced apart from each other can achieve an effect that the liquid droplet is better attached to the hydrophilic material surface 31.

In the invention, after the hydrophilic and hydrophobic surface spacing structure 3 is arranged on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2, during rotation of the drum body 1, the hydrophilic and hydrophobic spacing surface structures 3 can reciprocally enter and leave the bath liquid in the drum body 1 along with the inner wall surface of the drum body 1 and/or the agitating structure 2, the hydrophilic material surface 31, the adhesion of the inner wall surface of the drum body 1 and/or the stirring structure 2 to the bath liquid droplets can be increased, the hydrophobic material surface 32 can increase the driving force of the inner wall surface of the drum body 1 and/or the stirring structure 2 to the aggregation of the bath liquid drops based on the hydrophobic characteristic, so the structural characteristics of the inner wall surface of the drum body 1 and/or the stirring structure 2 are optimized, thereby strengthening the mechanical action of the rotary drum on the leather in the leather making process, accelerating the permeation and mass transfer process of chemicals on the leather and improving the leather making efficiency. It should be noted that the distribution of the hydrophilic-hydrophobic surface structure 3 on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 can be classified into the following three cases: firstly, as shown in fig. 1 and fig. 2, the hydrophilic and hydrophobic spacing surface structures 3 are only distributed on the surface of the stirring structure 2; secondly, as shown in fig. 3, the hydrophilic and hydrophobic interval surface structures 3 are only distributed on the inner wall surface of the drum body 1; thirdly, as shown in fig. 4, the hydrophilic and hydrophobic surface structures 3 are distributed on the inner wall surface of the drum body 1 and the surface of the stirring structure 2 at the same time. The distribution here is understood to mean that the hydrophilic-hydrophobic spacing surface structures 3 partially or completely wrap the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2.

Since the principle of the hydrophilic-hydrophobic spacing surface structure 3 for optimizing the surface of the stirring structure 2 is similar to the principle of the hydrophilic-hydrophobic spacing surface structure 3 for optimizing the inner wall surface of the drum body 1, the present invention will be explained below with reference to the principle of the hydrophilic-hydrophobic spacing surface structure 3 for optimizing the surface of the stirring structure 2 for economy. Referring to fig. 5 and 6, there are shown a gain principle of the stirring structure 2 having the hydrophilic and hydrophobic partition surface structures 3 leaving the bath (a gain principle of the baffle plate 21 having the hydrophilic and hydrophobic partition surface structures 3 leaving the bath as shown in fig. 5 (a); a gain principle of the convex piles 22 having the hydrophilic and hydrophobic partition surface structures 3 leaving the bath as shown in fig. 5 (b)), and a gain principle of the stirring structure 2 having the hydrophilic and hydrophobic partition surface structures 3 entering the bath (a gain principle of the baffle plate 21 having the hydrophilic and hydrophobic partition surface structures 3 entering the bath as shown in fig. 6 (a); a gain principle of the convex piles 22 having the hydrophilic and hydrophobic partition surface structures 3 entering the bath as shown in fig. 6 (b)), respectively.

Firstly, when the stirring structure 2 impacts the bath, the inertial force drives the bath to rapidly spread on the surface of the bath, and a part of the kinetic energy of the bath is converted into surface energy and dissipation energy. As the hydrophilic and hydrophobic interval surface structures 3 are arranged on the surface of the stirring structure 2, the bath solution is large in spreading area on the surface 31 of the hydrophilic material, the spreading time is long, and the spreading area on the surface 32 of the hydrophobic material is small and the spreading time is short. According to the physical phenomenon that the bath liquid is attached to the surface 31 of the hydrophilic material and forms a liquid film, the bath liquid attachment property on the surface 31 of the hydrophilic material can realize two-aspect gain effects on the tanning drum on the premise of not causing adverse effect on the quality of leather: on the one hand, the contact area of the leather and the bath liquid in the rising process can be increased. Compared with the original stainless steel metal surface of the mechanical component, during the rising period of the stirring structure 2 of the adhering bath, the leather slides on the surface of the adhering bath under the action of gravity, and the additional mass transfer exchange effect occurs with the bath attached by the hydrophilic and hydrophobic partition surface structure 3, and under the condition that the absolute tanning duration is unchanged, the relative tanning duration is prolonged, the effect of the hydrophilic and hydrophobic partition surface structure 3 on the leather is shown in fig. 5(a) and 5(b), and in fig. 5(a) and 5(b), the small convex points on the baffle plate 21 and the convex piles 22 represent bath liquid drops adsorbed by the hydrophilic material surface 31. Meanwhile, the hydrophilic and hydrophobic surface spacing structure 3 attached to the bath lotion can enhance the interaction between the stirring structure 2 and the leather, so that the leather can reach a higher traction position in the rising process, the wrinkled leather can be fully extended, the throwing kinetic energy of the leather is improved while the total energy loss is not increased, and the mass transfer effect is enhanced. On the other hand, the flow field of the bath liquid at the bottom of the rotary drum can be promoted to be more disordered, thereby enhancing the mass transfer function between the bath liquid and the leather. When the stirring structure 2 in the rotary drum pulls the leather into the bath, a large number of liquid drops are knocked up, and the liquid drops are attached to the hydrophilic and hydrophobic interval surface structures 3 to form a liquid film, so that the traction force of the stirring structure 2 on the leather is enhanced. However, the conventional stirring structure 2 with a metal surface has a weak surface force with the leather, so that the leather can be quickly peeled off after the stirring structure 2 pulls the leather into the bath. For the drum with the hydrophilic and hydrophobic partition surface structure 3, the leather is more easily dragged into the bath liquid at the bottom of the drum, a strong stirring effect is generated, so that the internal flow field of the bath liquid at the bottom is more disordered, and the effects of shearing the leather mass transfer boundary layer and thinning the mass transfer boundary layer are achieved, so that the convective mass transfer effect is promoted, as shown in fig. 6(a) and 6(b), small convex points on the baffle 21 and the convex piles 22 represent bath liquid drops adsorbed on the hydrophilic material surface 31.

The present invention is not limited to the specific materials of the hydrophilic material and the hydrophobic material, but the hydrophilic material may increase the adhesion of the inner wall surface of the drum body 1 and/or the stirring structure 2 to the bath liquid droplets based on the hydrophilic property thereof, and the hydrophobic material may increase the driving force of the inner wall surface of the drum body 1 and/or the stirring structure 2 to the aggregation of the bath liquid droplets based on the hydrophobic property thereof. Illustratively, the hydrophilic material may be hydrophilic metal/non-metal nanoparticles, hydrophilic resins, polyacrylic acid, silica, polyvinylpyrrolidone, or the like, and the hydrophobic material may be an alkane, oil, fluorinated polyethylene, fluorocarbon wax, or other synthetic fluoropolymer, or the like.

In one embodiment of the present invention, a manifestation of the hydrophilic-hydrophobic spaced surface structures 3 is provided, the hydrophilic-hydrophobic spaced surface structures 3 being structures in which a hydrophilic coating is spaced apart from a hydrophobic coating, wherein: the hydrophilic coating is a hydrophilic material surface 31 and is formed by preparing a hydrophilic material on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2; the hydrophobic coating is a hydrophobic material surface 32, and the hydrophobic coating is formed by preparing a hydrophobic material on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2. In the embodiment, the hydrophilic material surface 31 and the hydrophobic material surface 32 are both coatings, which can be understood as a coating on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2, and the coating and the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 can effectively form a compact composite structure, so that the surface characteristics of the inner wall material of the drum body 1 and/or the material of the stirring structure 2 can be changed on the basis of not influencing the original structure of the inner wall surface of the drum body 1 and/or the stirring structure 2, thereby optimizing the movement of the leather in the tanning drum on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 and strengthening the bath liquid flow, and realizing a physical mechanism and principle method for strengthening the mechanical action of the tanning process by using the hydrophilic coatings and the hydrophobic coatings which are arranged at intervals. For example, as shown in fig. 7(a), the structure diagram of the hydrophilic coating and the hydrophobic coating being disposed on the surface of the stud 22 at intervals is shown, and as shown in fig. 7(b), the structure diagram of the hydrophilic coating and the hydrophobic coating being disposed on the surface of the baffle 21 at intervals is shown.

Wherein, the hydrophilic material can be prepared on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 by a spraying technology, a physical vapor deposition technology, a cathode electrochemical deposition technology, an electrophoresis directional deposition technology or a micro-contact printing technology, etc. to form the hydrophilic coating. Similarly, the hydrophobic material can be prepared on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 by a spraying technology, a physical vapor deposition technology, a cathode electrochemical deposition technology, an electrophoretic directional deposition technology or a micro-contact printing technology, so as to form the hydrophobic coating. It should be noted that, when different materials are used to prepare the coating, the coating preparation techniques used may be different, that is, when different hydrophilic materials are used to prepare the hydrophilic coating, the coating preparation techniques used may be different, and correspondingly, when different hydrophobic materials are used to prepare the hydrophobic coating, the coating preparation techniques used may be different. "preparing" herein includes, but is not limited to, spraying, depositing, printing. For example, when hydrophilic pure metal or hydrophilic composite metal nanoparticles are used as the hydrophilic material, a hydrophilic coating may be sprayed on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 by using a spraying technique; when hydrophilic resin is adopted as the hydrophilic material, a micro-contact printing technology can be adopted to print a hydrophilic coating on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2; when polyvinylpyrrolidone is used as the hydrophilic material, a sol-gel method may be used to print a hydrophilic coating on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2. It should be emphasized that, since the present invention is mainly used in the tanning process, when the hydrophilic coating and the hydrophobic coating are prepared on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 in consideration of the use of leather in daily life, the hydrophilic material and the hydrophobic material should be selected to be non-toxic or meet the relevant national standards.

In one embodiment of the present invention, a manifestation of the hydrophilic-hydrophobic spacing surface structures 3 is provided, wherein the hydrophilic-hydrophobic spacing surface structures 3 are structures in which a hydrophilic coating is spaced apart from the inner wall of the drum body 1 and/or the polished original surface of the stirring structure 2, wherein: the hydrophilic coating is a hydrophilic material surface 31 and is formed by preparing a hydrophilic material on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2; the polished original surface of the inner wall of the drum body 1 and/or the agitating structure 2 is the hydrophobic material surface 32. Since the drum is usually made of a metal material such as stainless steel, and the smooth inner wall surface of the metal has a hydrophobic property, the present embodiment can effectively save cost by using a polished original surface as the hydrophobic material surface 32. In actual operation, the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 can be polished, and then hydrophilic coatings are prepared at a plurality of positions on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 after polishing, so that the hydrophilic coatings and the polished original surface of the inner wall of the drum body 1 and/or the surface of the stirring structure 2 are arranged at intervals, the hydrophilic and hydrophobic spaced surface structure 3 is obtained, the movement of leather in the tanning drum on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 is optimized, the bath liquid flow is strengthened, and the physical mechanism and principle method for strengthening the mechanical action in the tanning process are realized by using the hydrophilic coatings arranged at intervals and the polished original surface of the inner wall of the drum body 1 and/or the stirring structure 2 as the hydrophobic material surface 32. Regarding the preparation method of the hydrophilic coating, other embodiments can be referred to, and this embodiment is not repeated herein.

In an embodiment of the present invention, a manifestation of the hydrophilic and hydrophobic partition surface structure 3 is provided, wherein the hydrophilic and hydrophobic partition surface structure 3 is a structure formed by splicing a plurality of modularized hydrophilic and hydrophobic sheets, and wherein: the outer surface of each hydrophilic and hydrophobic sheet is a surface formed by the hydrophilic material surface 31 and the hydrophobic material surface 32 which are distributed at intervals, and the hydrophilic and hydrophobic sheets are tightly attached to the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 for installation. In this embodiment, the hydrophilic and hydrophobic flakes are modularized, each hydrophilic and hydrophobic flake is provided with at least one set of hydrophilic material surface 31 and hydrophobic material surface 32, and when there are multiple sets, the hydrophilic material surface 31 and the hydrophobic material surface 32 are distributed at intervals on the outer surface of each hydrophilic and hydrophobic flake, as shown in fig. 8(a) to 8 (g). In the embodiment, the hydrophilic and hydrophobic sheets can be directly attached or installed on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 through connection modes such as sticking, riveting, threading, micro welding and the like, so that the hydrophilic and hydrophobic separation surface structure 3 which is assembled in a modularized mode can be formed on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2, the improvement of the mechanical performance of the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 is realized, and the movement of leather in the tanning drum on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 and the strengthening of bath liquid flowing are optimized. The advantage of this embodiment lies in, the thin slice course of working can directly go on the plane, has avoided the technological problem that curved surface processing brought, and the hydrophilic thin slice of modularization is removable, and the cost is lower, guarantees the long-time gain effect of tanning rotary drum in the tanning process. For example, as shown in fig. 9(a), a structural diagram of the modularized hydrophilic and hydrophobic thin sheets disposed on the surface of the protruding piles 22 is shown, and as shown in fig. 9(b), a structural diagram of the modularized hydrophilic and hydrophobic thin sheets disposed on the surface of the baffle 21 is shown.

Optionally, hydrophilic and hydrophobic flakesThe preparation method comprises the following steps: inlaying the special-shaped hydrophobic thin sheet obtained by wire cutting on the surface of hydrophilic resin in a high-temperature and high-pressure environment, and then passing through CuCl₂The solution corrodes the surface of the hydrophobic sheet, and the surface of the sheet is modified by using a thermostatic water bath of a stearic acid absolute ethyl alcohol solution, so that a composite surface with a hydrophilic region and a hydrophobic region coexisting is finally obtained, namely the hydrophilic and hydrophobic sheet in the embodiment.

In one embodiment of the present invention, a manifestation of a hydrophilic-hydrophobic spacer surface structure 3 is provided, the hydrophilic-hydrophobic spacer surface structure 3 being a structure of modular hydrophilic sheets spaced apart from a hydrophobic coating, wherein: the outer surface of the hydrophilic sheet is a hydrophilic material surface 31, and the hydrophilic sheet is tightly attached to the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 for installation; the hydrophobic coating is a hydrophobic material surface 32, and the hydrophobic coating is formed by preparing a hydrophobic material on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2. In the embodiment, the hydrophilic material surface 31 is installed on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 in a hydrophilic sheet mode, and the hydrophobic material surface 32 is presented by a hydrophobic coating, so that the surface characteristics of the inner wall material of the drum body 1 and/or the material of the stirring structure 2 are changed, the movement of the leather in the tanning drum on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 and the strengthened bath liquid flow are optimized, and a physical mechanism and principle method for strengthening the mechanical action in the tanning process by using the hydrophilic sheets and the hydrophobic coating which are arranged at intervals are realized.

In one embodiment of the present invention, a manifestation of the hydrophilic-hydrophobic spacing surface structure 3 is provided, wherein the hydrophilic-hydrophobic spacing surface structure 3 is a structure of a modular hydrophilic sheet spaced from the polished original surface of the inner wall of the drum body 1 and/or the agitating structure 2, wherein: the outer surface of the hydrophilic sheet is a hydrophilic material surface 31, and the hydrophilic sheet is tightly attached to the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 for installation; the polished original surface of the inner wall of the drum body 1 and/or the agitating structure 2 is the hydrophobic material surface 32. In the embodiment, the hydrophilic material surface 31 is installed on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 in a hydrophilic sheet mode, and the hydrophobic material surface 32 is presented by the polished original surface of the inner wall of the drum body 1 and/or the stirring structure 2, so that the surface characteristics of the material of the inner wall of the drum body 1 and/or the material of the stirring structure 2 are changed, the movement of the leather in the tanning drum on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 is optimized, the bath liquid flow is strengthened, and a physical mechanism and a principle method for enhancing the mechanical action of the tanning process by using the hydrophilic sheets and the polished original surface which are arranged at intervals are realized.

In the above two embodiments, the hydrophilic sheet can be understood as a sheet structure having only the hydrophilic material surface 31, and the hydrophilic material surface 31 on the sheet structure can be prepared by coating. The hydrophilic sheet may be attached to the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 by means of attachment means such as adhesion, riveting, screwing, or micro-welding, and spaced apart from the hydrophobic material surface 32. For the preparation and principle explanation of the hydrophobic coating or the polished original surface of the inner wall of the drum body 1 and/or the stirring structure 2, which can serve as the hydrophobic material surface 32, reference is made to other embodiments, which are not repeated herein.

In one embodiment of the present invention, a manifestation of a hydrophilic-hydrophobic spacer surface structure 3 is provided, the hydrophilic-hydrophobic spacer surface structure 3 being a structure in which a hydrophilic coating is spaced apart from modular hydrophobic flakes, wherein: the hydrophilic coating is a hydrophilic material surface 31 and is formed by preparing a hydrophilic material on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2; the outer surface of the hydrophobic sheet is a hydrophobic material surface 32, and the hydrophobic sheet is attached to the inner wall surface of the drum 1 and/or the surface of the stirring structure 2 in close contact therewith. In the embodiment, the surface 32 of the hydrophobic material is arranged on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 in a manner of a hydrophobic sheet, and the surface 31 of the hydrophilic material is presented in a manner of a hydrophilic coating, so that the surface characteristics of the material on the inner wall surface of the drum body 1 and/or the material on the stirring structure 2 are changed, the movement of the leather in the tanning drum on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 is optimized, and the flow of bath liquid is enhanced, and a physical mechanism and principle method for enhancing the mechanical action in the tanning process by using the hydrophobic sheets and the hydrophilic coating which are arranged at intervals are realized.

The hydrophobic sheet of this embodiment can be understood as a sheet structure having only the hydrophobic material surface 32, and the hydrophobic material surface 32 on the sheet structure can be prepared by coating. The hydrophobic sheet may be attached to the inner wall surface of the drum body 1 and/or the surface of the agitating structure 2 by means of bonding, riveting, screwing, micro-welding, or the like, and spaced apart from the hydrophilic coating. Regarding the preparation method of the hydrophilic coating, other embodiments can be referred to, and this embodiment is not repeated herein.

In one embodiment of the present invention, a manifestation of a hydrophilic-hydrophobic spacing surface structure 3 is provided, the hydrophilic-hydrophobic spacing surface structure 3 being a structure in which modular hydrophilic flakes are spaced apart from modular hydrophobic flakes, wherein: the outer surface of the hydrophilic sheet is a hydrophilic material surface 31, and the hydrophilic sheet is tightly attached to the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 for installation; the outer surface of the hydrophobic sheet is a hydrophobic material surface 32, and the hydrophobic sheet is attached to the inner wall surface of the drum 1 and/or the surface of the stirring structure 2 in close contact therewith. In the embodiment, the hydrophilic material surface 31 is installed on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 in a hydrophilic sheet mode, and the hydrophobic material surface 32 is installed on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 in a hydrophobic sheet mode, so that the surface characteristics of the inner wall material of the drum body 1 and/or the material of the stirring structure 2 are changed, the movement of leather in the tanning drum on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 is optimized, the bath liquid flow is strengthened, and a physical mechanism and a principle method for strengthening the mechanical action in the tanning process by using the hydrophilic sheets and the hydrophobic sheets which are arranged at intervals are realized.

The hydrophilic sheet of this embodiment can be understood as a sheet structure having only the hydrophilic material surface 31, and the hydrophilic material surface 31 on the sheet structure can be prepared by coating; the hydrophobic sheet of this embodiment can be understood as a sheet structure having only the hydrophobic material surface 32, and the hydrophobic material surface 32 on the sheet structure can be prepared by coating. The hydrophilic sheet and the hydrophobic sheet can be mounted on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2 through connection modes such as sticking, riveting, screwing, micro welding and the like, and the hydrophilic sheet and the hydrophobic sheet are spliced with each other, so that the hydrophilic and hydrophobic partition surface structure 3 is formed on the inner wall surface of the drum body 1 and/or the surface of the stirring structure 2.

It should be noted that, the shapes of the hydrophilic material surface 31 and the hydrophobic material surface 32 are not limited in the present invention, and may be linear, triangular, zigzag, wavy, or distributed in spots, and the spots may include circular, triangular, rectangular, polygonal, or any other shapes. For example, the hydrophilic material surface 31 and the hydrophobic material surface 32 are spaced at intervals in different pattern shapes on the outer surface of the hydrophilic-hydrophobic sheet as shown in fig. 8(a) to 8(g), and the hydrophilic coating and the hydrophobic coating are spaced at intervals in different pattern shapes on the surface of the baffle 21 as shown in fig. 10(a) to 10 (g).

In an embodiment of the invention, referring to fig. 1, fig. 2, and fig. 5 to fig. 7, in the hydrophilic-hydrophobic spacing surface structure 3, the hydrophilic material surface 31 and the hydrophobic material surface 32 are both linear. The reason why the hydrophilic material surface 31 and the hydrophobic material surface 32 can be preferably linear is that the linear processing difficulty is small, and the hydrophilic material surface 31 and the hydrophobic material surface 32 can obtain a preferable area ratio, which is beneficial to the implementation of the scheme of the present invention.

Next, a concrete structure of a leather making drum having a hydrophilic-hydrophobic spaced surface structure 3 according to an embodiment of the present invention will be described by way of an example.

As shown in figure 1, two drum bottom plates 10 are arranged on two sides of a drum body 1 of the tanning drum through a drum hoop 4, 4 connecting snap rings 5 distributed at 90 degrees are welded on the drum hoop 4, each connecting snap ring 5 is provided with two screw holes connected with the drum body 1, and the purpose is to enable a sealing ring between the drum bottom plate 10 and the drum body 1 to realize a sealing function. The other side of the drum bottom plate 10 is provided with a reinforcing bottom plate 9 through screws, the reinforcing bottom plate 9 is provided with a reinforcing rib at intervals of 60 degrees, and each reinforcing rib is provided with three screw holes which can provide radial acting force for the drum bottom plate 10, so that the drum bottom plate 10 and the drum body 1 are more tightly sealed. The drum main shaft 8 is connected with a drum bottom plate 10 through welding, is nested with a reinforcing bottom plate 9 through keys, is connected with a bearing 7 on the supporting frame 6, and is jointly installed on a positioning support. The side surface of the drum body 1 is also provided with a drum door 11, and the two sides of the drum door 11 are provided with slide rails, so that the door can be opened or closed conveniently when leather is added. The drum body 1 mainly comprises convex piles 22, baffles 21 and hydrophilic and hydrophobic spacing surface structures 3. The hydrophilic material surface 31 and the hydrophobic material surface 32 of the hydrophilic-hydrophobic spacing surface structure 3 are distributed on the surfaces of the convex piles 22 and the baffle 21 in a stripe shape, as shown in fig. 1, fig. 2, and fig. 5 to fig. 7.

When leather (hide) is loaded into the drum through the door 11 and the drum spindle 8 is rotated by the motor, the drum body 1 starts to rotate, and the stirring structures 2 (such as the studs 22 and the baffles 21) in the drum body 1 move back and forth into and out of the bath. In the process, the hydrophilic and hydrophobic interval surface structures 3 on the surface of the stirring structure 2 enter or leave the bath liquid in a reciprocating way, and along with the periodic entering or leaving process of the bath liquid, the surface 31 of the hydrophilic material is continuously attached with liquid drops, so that the traction force between the surface of the hydrophilic material and the wet leather is increased, and the following specific physical phenomena occur between the leather and the surfaces of the baffle plate 21 and the convex piles 22. Firstly, when the convex piles 22 or the baffle plates 21 pull the leather into the bath solution, the leather is not easy to fall off under the action of strong traction force of the hydrophilic and hydrophobic surface structure 3, the bottom bath solution is easier to stir, the flow field becomes disordered, and the mass transfer effect is enhanced. Secondly, when the leather is pulled away from the bath by the studs 22 or the baffles 21, a large number of droplets are attached to the surface 31 of the hydrophilic material due to the strong adhesion of the surface 31 of the hydrophilic material to the droplets. The leather can have mass transfer effect with the attached bath liquid in the process of sliding on the hydrophilic and hydrophobic interval surface structure 3 under the action of gravity, so that the relative leather making time is prolonged. Thirdly, under the effect of 3 strong traction forces of the hydrophilic and hydrophobic interval surface structure, the rising leather can move to a higher traction position, so that the extension is more sufficient, and meanwhile, the throwing and falling kinetic energy of the falling process is promoted. Therefore, the hydrophilic and hydrophobic surface structure 3 can achieve an effect of gain, not only can improve the mass transfer effect of leather and shorten the leather making time in the actual leather making process, but also can avoid the adverse effect of long-time mechanical action on the physical and mechanical properties of the leather.

Preferably, the number of the studs 22 in the drum is four pairs, and the number of the baffles 21 is two pairs, so that the baffles 21 and the studs 22 are distributed at an included angle of 30 ° in the circumferential direction. The arrangement mode of two adjacent protruding stake 22 in drum body 1 direction is the row of fork, and its aim at destroys the fixed form of leather in the rotary drum to reinforcing mechanical action promotes the tanning effect. The surfaces of the baffle plate 21 and the convex piles 22 are provided with strip-shaped hydrophilic sheets, and the original surfaces of the hydrophilic sheets serve as hydrophobic material surfaces 32, so that the function of spacing hydrophilic and hydrophobic surfaces is realized. The outer surface of the hydrophilic sheet may be coated with chemically treated gold, and the hydrophilic material surface 31 is preferably linear to enhance the tanning process at a low cost.

It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

It should also be noted that, in this document, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Moreover, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions or should not be construed as indicating or implying relative importance. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or terminal equipment comprising the element.

The technical solutions provided by the present invention are described in detail above, and the principle and the implementation manner of the present invention are described in this document by using specific examples, and the description of the above examples is only for assisting understanding of the present invention, and the content of the present description should not be construed as limiting the present invention. While various modifications of the illustrative embodiments and applications herein will be apparent to those skilled in the art, it is not desired to be exhaustive or exhaustive that all such modifications and variations are within the scope of the invention.