Multi-coating processing technology and device for high-resistance waterproof cloth

Abstract

The invention relates to the technical field of cloth coating processing, in particular to a multi-coating processing technology and device for high-resistance waterproof cloth, and the multi-coating processing technology and device for the high-resistance waterproof cloth are mainly characterized in that coating processing of the cloth is assisted through an arranged coating processing auxiliary mechanism; the coating auxiliary plate body and the auxiliary body are matched for use, so that the coating is uniformly distributed, and the processing quality is further improved; the accommodating cavity in the coating auxiliary plate body is filled with the waterproof coating, so that the processing emergency requirement can be met; in addition, a corresponding regulation and control assembly is arranged in the containing cavity, a regulation and control effect is achieved on the emergency coating, and good working flexibility is achieved; a coating auxiliary structure is arranged at the bottom end of the auxiliary body, so that the coating on the cloth main body can be further uniformly distributed, and the waterproof processing and manufacturing requirements of the cloth can be better met.

Description

Technical Field

[0001] The present invention relates to the technical field of fabric coating processing, in particular to a multi-coating processing technology and device for highly resistant waterproof fabric. Background Art

[0002] The existing patent document with announcement number CN113249978A discloses a method for flame retardant and waterproof coating of fabrics, wherein the coating work includes coating processing on both sides and drying work on both sides, and finally the product is finalized by a finalizing device; in the coating process, the scheme adopts a combination of multiple coating processes, and in a coating process, a certain angle is formed between the coating roller and the fabric. During coating, a linear speed difference is formed between the linear speed of the outer periphery of the coating roller and the fabric, resulting in a certain slippage, increasing the dynamic movement of the coating on the surface during coating, so that the coating can completely and fully coat the surface of the fabric; and then a secondary coating is performed, the coating effect is more uniform, and the coating condition of the coating device 1 can be supplemented, so that the surface of the coated reagent is smoother and the thickness is closer, thereby ensuring that the coating with comprehensive effects such as flame retardant and waterproof can be more fully attached to the surface of the fabric.

[0003] Furthermore, the existing patent document with announcement number CN219187495U discloses a fabric waterproof coating coating device, which includes a bracket, the end face of the bracket is equipped with a discharge roller, a loading roller, a lowering roller, and a receiving roller, a coating workbench is installed between the loading roller and the lowering roller, and the coating workbench is fixedly connected to the end face of the bracket, the end face of the bracket is equipped with a spray box shell, and the inner cavity of the spray box shell is equipped with a cleaning mechanism; the cleaning mechanism includes a cleaning frame, a brush roller, a slider, a slide groove, a handle, and a rotating shaft; the slide groove is opened at the bottom end of the inner cavity of the spray box shell, the slider is slidably connected to the inside of the slide groove, the brush roller is rotatably connected to the inner cavity of the cleaning frame through the rotating shaft, the cleaning frame is slidably connected to the inner cavity of the spray box shell, the handle is installed on the outside of the spray box shell, and the handle is fixedly connected to the cleaning frame through a connecting rod.

[0004] The above two schemes are for the waterproof coating processing of fabrics. When the waterproof coating is applied on the fabric, in order to improve its waterproof performance, multiple layers of coating are generally performed. In the prior art, the coating needs to be dried in time after coating. This process lacks a corresponding auxiliary mechanism for evenly distributing the coating, which easily causes uneven distribution of the coating on the fabric, and then causes uneven processing quality, which needs to be improved and optimized.

[0005] To this end, the present invention proposes a multi-coating process and device for high-resistance waterproof fabric to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a multi-coating process and device for highly resistant waterproof fabrics to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: a multi-coating process for high-resistance waterproof fabric, including grey fabric production, grey fabric cleaning, primary coating, primary drying, secondary coating, secondary drying and finished product shaping; The coating process is performed by a coating process device that is provided.

[0008] Preferably, it includes a coating processing device, which includes a paint spraying device, a coating roller, a drying device and a coating processing auxiliary mechanism; the paint spraying device performs paint processing on the fabric body, and the fabric body is coated with paint through the coating roller, the coating processing auxiliary mechanism performs auxiliary paint processing on the fabric body, and then the fabric body is dried through the drying device.

[0009] Preferably, the coating processing auxiliary mechanism includes a supporting frame, a lifting control rod, a bearing rod, a loading slot, a threaded hole, a cover plate, a sealing plate, a paint auxiliary plate body, a accommodating cavity, a connecting card slot, an installation card slot, an installation screw, an auxiliary handle, an auxiliary body, an adjustment component and a paint auxiliary structure; the supporting frame is connected with a lifting control rod, the bottom end of the lifting control rod is provided with a bearing rod, the bottom end of the bearing rod is provided with a loading slot, both ends of the bearing rod are symmetrically provided with threaded holes, and the threaded holes are connected with the loading slots, one end of the paint auxiliary plate body is provided with an auxiliary body, a accommodating cavity is provided in the paint auxiliary plate body, and the accommodating cavity extends into the auxiliary body, a connecting card slot is provided at the cavity mouth of the accommodating cavity, both ends of the paint auxiliary plate body are symmetrically provided with installation card slots, the connecting card slots are adapted to be clamped with the sealing plate, the sealing plate is fixedly provided on the cover plate, one end of the installation screw is fixedly provided with an auxiliary handle, the accommodating cavity is provided with an adjustment component, and the bottom end of the auxiliary body is provided with a paint auxiliary structure.

[0010] Preferably, the auxiliary bodies and the paint auxiliary plate bodies are arranged in the same number of groups, and the end cross-sectional shape of the auxiliary bodies is arranged to be an isosceles triangle.

[0011] Preferably, one end of the paint auxiliary plate is adapted to be plugged into the loading slot.

[0012] Preferably, the mounting slots correspond to the threaded holes in setting positions and have the same number of setting groups, the mounting screws are threadedly connected to the threaded holes, and one end of the mounting screws is snap-fitted to the mounting slots.

[0013] Preferably, the regulating component includes a baffle, a material trough, an inverted cone trough body, a movable regulating plate, a regulating through slot, a telescopic control rod, and a connecting plate; the baffle is fixedly arranged in the accommodating cavity, and the material trough is equidistantly arranged on the baffle, and an inverted cone trough body is arranged at the upper end slot position of the material trough, the movable regulating plate is arranged in the accommodating cavity, and the regulating through slot is equidistantly arranged on the movable regulating plate, the movable regulating plate is connected to the telescopic control rod, the telescopic control rod is fixedly connected to the connecting plate, and the connecting plate is fixed to the paint auxiliary plate by screws.

[0014] Preferably, the inverted cone trough body and the material passing trough are set in corresponding positions and have the same number of groups. An inverted cone trough body is set on one material passing trough, the small port of the inverted cone trough body is connected to the material passing trough, and the large port of the inverted cone trough body is set on the baffle; the regulating through trough and the material passing trough are set in the same number of groups, and the notches of both the regulating through trough and the material passing trough are set to be circular, and the notch diameters of the two are set to be equal.

[0015] Preferably, the paint auxiliary structure includes an arc-shaped auxiliary surface, a bottom vertical groove, a side oblique groove, an auxiliary curved surface, a drainage groove, and a connecting groove; the arc-shaped auxiliary surface is arranged at the bottom of the auxiliary body, the bottom vertical groove is equidistantly arranged at the end position of the bottom of the auxiliary body, and the bottom vertical groove is connected to the accommodating cavity, the side oblique groove is equidistantly arranged at the side position of the bottom of the auxiliary body, and the side oblique groove is also connected to the accommodating cavity, an auxiliary curved surface is arranged at the inner groove position of the bottom vertical groove, the drainage groove is symmetrically arranged on the arc-shaped auxiliary surface, the connecting groove is equidistantly arranged on the arc-shaped auxiliary surface, and one end of the connecting groove is connected to the drainage groove, and the other end of the connecting groove is connected to the side oblique groove.

[0016] Preferably, the side oblique grooves and the bottom vertical grooves are arranged alternately, and two drainage grooves are symmetrically arranged on the arc-shaped auxiliary surface; the connecting grooves are arranged at corresponding positions to the side oblique grooves and have the same number of groups.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The waterproof fabric processing device designed by the present invention mainly assists the coating processing of the fabric by means of a coating processing auxiliary mechanism. After the fabric body is sprayed and transported by the coating spraying device and the coating roller, the coating is evenly distributed by the use of the coating auxiliary plate and the auxiliary body, thereby further improving its processing quality. The accommodating cavity in the coating auxiliary plate is filled with waterproof coating, thereby responding to emergency processing needs. Furthermore, a corresponding regulating component is arranged in the accommodating cavity, thereby having a regulating effect on the emergency coating and having good working flexibility. A coating auxiliary structure is arranged at the bottom end of the auxiliary body, thereby further evenly distributing the coating on the fabric body, and while ensuring uniform coating, it also has a certain recycling effect on the coating, thereby improving the utilization efficiency of the coating. The present invention can better meet the needs of fabric waterproof processing and production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the front side of the structure connection of the fabric coating processing device of the present invention; Figure 2 For the present invention Figure 1 A magnified schematic diagram of the structural connection at center A; Figure 3 It is a schematic diagram of the back side of the structure connection of the fabric coating processing device of the present invention; Figure 4 An exploded top view of the coating processing auxiliary mechanism of the present invention; Figure 5 An exploded bottom view of the coating processing auxiliary mechanism of the present invention; Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structural connection at B in the middle; Figure 7 It is a schematic diagram of the front side of the connection between the coating auxiliary plate body and the regulating component structure of the present invention; Figure 8 The left side schematic diagram of the connection between the coating auxiliary plate and the regulating component structure of the present invention; Fig. 9 For the present invention Figure 8 A magnified schematic diagram of the structural connection at C in the middle; Fig.10 It is a top view of the connection between the coating auxiliary structure and the local structure of the auxiliary body of the present invention; Fig.11 For the present invention Fig.10 The enlarged schematic diagram of the structural connection at D in the middle; Fig.12 It is a bottom view of the connection between the coating auxiliary structure and the auxiliary body local structure of the present invention; Fig.13 For the present invention Fig.12 Enlarged schematic diagram of the structural connection at point E in the middle.

[0019] In the figure: 1, coating spraying device; 2, coating roller; 3, drying device; 4, cloth body; 5, coating processing auxiliary mechanism; 501, support frame; 502, lifting control rod; 503, bearing rod; 504, loading slot; 505, threaded hole; 506, cover plate; 507, sealing plate; 508, coating auxiliary plate; 509, accommodating cavity; 510, connecting slot; 511, installation slot; 5 12. Mounting screws; 513. Auxiliary handle; 514. Auxiliary body; 601. Baffle; 602. Material trough; 603. Inverted cone trough body; 604. Movable regulating plate; 605. Regulating trough; 606. Telescopic control rod; 607. Connecting plate; 701. Arc-shaped auxiliary surface; 702. Bottom vertical groove; 703. Side oblique groove; 704. Auxiliary curved surface; 705. Drainage groove; 706. Connecting groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. The embodiments of the present invention and all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1-Figure 13 , a multi-coating process for highly resistant waterproof fabrics, including grey cloth production, grey cloth cleaning, primary coating, primary drying, secondary coating, secondary drying and finished product shaping; the coating is carried out through a coating device.

[0022] The coating processing device here includes a paint spraying device 1, a coating roller 2, a drying device 3 and a coating processing auxiliary mechanism 5; the paint spraying device 1 performs paint processing on the fabric body 4, and the fabric body 4 is conveyed with paint through the coating roller 2, the coating processing auxiliary mechanism 5 performs auxiliary paint processing on the fabric body 4, and then the fabric body 4 is dried through the drying device 3.

[0023] The present invention mainly assists the coating processing of the fabric by setting up a coating processing auxiliary mechanism 5. After the fabric body 4 is sprayed and transported by the paint spraying device 1 and the coating roller 2, the paint is evenly distributed through the coordinated use of the paint auxiliary plate 508 and the auxiliary body 514, thereby further improving its processing quality; and the accommodating cavity 509 in the paint auxiliary plate 508 is filled with waterproof paint to meet emergency processing needs; further, a corresponding regulating component is set in the accommodating cavity 509, which has a regulating effect on the emergency paint and has good working flexibility; a paint auxiliary structure is set at the bottom end of the auxiliary body 514, which can further evenly distribute the paint on the fabric body 4, and on the basis of ensuring uniform coating, it also has a certain recovery effect on the paint, thereby improving the utilization efficiency of the paint.

[0024] Example 2: Based on Example 1, please refer to Figure 1-Figure 7 , the coating processing auxiliary mechanism 5 here includes a support frame 501, a lifting control rod 502, a bearing rod 503, a loading slot 504, a threaded hole 505, a cover plate 506, a sealing plate 507, a coating auxiliary plate 508, a accommodating cavity 509, a connecting card slot 510, an installation card slot 511, an installation screw 512, an auxiliary handle 513, an auxiliary body 514, a regulating component and a coating auxiliary structure; the support frame 501 is connected with a lifting control rod 502, the bottom end of the lifting control rod 502 is provided with a bearing rod 503, the bottom end of the bearing rod 503 is provided with a loading slot 504, threaded holes 505 are symmetrically provided at both ends of the bearing rod 503, and the threaded holes 505 are connected to the loading slot 504, an auxiliary body 514 is provided at one end of the coating auxiliary plate 508, a accommodating cavity 509 is provided in the coating auxiliary plate 508, and the accommodating cavity 509 extends into the auxiliary body 514 , a connecting slot 510 is provided at the cavity mouth of the accommodating cavity 509, and mounting slots 511 are symmetrically provided at both ends of the paint auxiliary plate 508, the connecting slot 510 is adapted to be snapped into the sealing plate 507, the sealing plate 507 is fixedly arranged on the cover plate 506, an auxiliary handle 513 is fixedly arranged at one end of the mounting screw 512, a regulating component is provided in the accommodating cavity 509, and a paint auxiliary structure is provided at the bottom end of the auxiliary body 514; the auxiliary body 514 here is arranged in the same number of groups as the paint auxiliary plate 508, and the end cross-sectional shape of the auxiliary body 514 is arranged to be an isosceles triangle; one end of the paint auxiliary plate 508 here is adapted to be plugged into the loading slot 504; the mounting slot 511 here corresponds to the setting position of the threaded hole 505 and is arranged in the same number of groups, the mounting screw 512 is adapted to be threadedly connected to the threaded hole 505, and one end of the mounting screw 512 is adapted to be snapped into the mounting slot 511.

[0025] After the fabric body 4 is sprayed and transported by the paint spraying device 1 and the coating roller 2, the paint is evenly distributed through the cooperation of the paint auxiliary plate 508 and the auxiliary body 514. The paint auxiliary plate 508 is symmetrically arranged in two groups up and down, and the auxiliary body 514 is arranged to evenly treat the paint on the fabric body 4.

[0026] Example 3: Based on Example 2, please refer to Figure 7-Figure 9 The regulating components include a baffle 601, a material trough 602, an inverted cone trough body 603, a movable regulating plate 604, a regulating through slot 605, a telescopic control rod 606, and a connecting plate 607; the baffle 601 is fixedly arranged in the accommodating cavity 509, and the baffle 601 is equidistantly provided with the material trough 602, the upper end notch position of the material trough 602 is provided with an inverted cone trough body 603, the movable regulating plate 604 is arranged in the accommodating cavity 509, and the movable regulating plate 604 is equidistantly provided with the regulating through slot 605, the movable regulating plate 604 is connected to the telescopic control rod 606, and the telescopic control rod 606 is connected to the telescopic control rod 606. The control rod 606 is fixedly connected to the connecting plate 607, and the connecting plate 607 is fixed to the paint auxiliary plate 508 by screws; the inverted cone trough body 603 here corresponds to the setting position of the material trough 602 and is set in the same number of groups. An inverted cone trough body 603 is set on a material trough 602, and the small port of the inverted cone trough body 603 is connected to the material trough 602, and the large port of the inverted cone trough body 603 is set on the baffle 601; the regulating through slot 605 is set in the same number of groups as the material trough 602, and the notches of both the regulating through slot 605 and the material trough 602 are set to be circular, and the diameters of the notches of the two are set to be equal.

[0027] Here, a corresponding regulating component is set in the accommodating cavity 509, which has a regulating function for emergency paint and has good working flexibility; that is, the position of the movable regulating plate 604 is controlled by the telescopic control rod 606 to regulate the movable regulating plate 604 to block the material passage 602 on the baffle 601 or the overlapping size of the regulating through groove 605 on the movable regulating plate 604 and the material passage 602 to control the material passage, wherein the accommodating cavity 509 in the paint auxiliary plate 508 is filled with waterproof paint to meet the emergency needs of processing.

[0028] Example 4: Based on Example 3, please refer to Figure 10-13The coating auxiliary structure includes an arc-shaped auxiliary surface 701, a bottom vertical groove 702, a side oblique groove 703, an auxiliary curved surface 704, a drainage groove 705, and a connecting groove 706; the arc-shaped auxiliary surface 701 is arranged at the bottom of the auxiliary body 514, the bottom vertical groove 702 is equidistantly arranged at the end position of the bottom of the auxiliary body 514, and the bottom vertical groove 702 is connected to the accommodating cavity 509, the side oblique groove 703 is equidistantly arranged at the side position of the bottom of the auxiliary body 514, and the side oblique groove 703 is also connected to the accommodating cavity 509, and the bottom vertical groove 702 An auxiliary curved surface 704 is provided at the inner notch position, the drainage groove 705 is symmetrically arranged on the arc-shaped auxiliary surface 701, and the connecting groove 706 is equidistantly arranged on the arc-shaped auxiliary surface 701, and one end of the connecting groove 706 is connected with the drainage groove 705, and the other end of the connecting groove 706 is connected with the side oblique groove 703; the side oblique groove 703 and the bottom vertical groove 702 are staggered, and two drainage grooves 705 are symmetrically arranged on the arc-shaped auxiliary surface 701; the connecting groove 706 and the side oblique groove 703 are arranged in corresponding positions and the number of groups is the same.

[0029] In this embodiment, the bottom end surface of the auxiliary body 514 is set as an arc-shaped auxiliary surface 701, so that the contact between the auxiliary body 514 and the cloth is softer, and the cloth is not scratched as much as possible on the basis of uniform coating.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Multi-coating process for highly resistant waterproof fabrics, characterized by: Including grey cloth production, grey cloth cleaning, primary coating, primary drying, secondary coating, secondary drying and finished product shaping; The coating process is performed by a coating process device that is provided.

2. A multi-coating processing device for highly resistant waterproof fabrics, characterized in that: The invention comprises a coating processing device, wherein the coating processing device comprises a coating spraying device (1), a coating roller (2), a drying device (3) and a coating processing auxiliary mechanism (5); the coating spraying device (1) performs coating processing on a fabric body (4), and the fabric body (4) is subjected to coating conveyance through the coating roller (2); the coating processing auxiliary mechanism (5) performs auxiliary coating processing on the fabric body (4), and then the fabric body (4) is subjected to drying processing through the drying device (3).

3. The multi-coating process and device for high-resistance waterproof fabric according to claim 2, characterized in that: The coating processing auxiliary mechanism (5) comprises a support frame (501), a lifting control rod (502), a bearing rod (503), a loading slot (504), a threaded hole (505), a cover plate (506), a sealing plate (507), a coating auxiliary plate body (508), a containing cavity (509), a connecting slot (510), an installation slot (511), a mounting screw (512), an auxiliary handle (513), an auxiliary body (514), an adjustment component and a coating auxiliary structure; the support frame (501) is connected to the lifting control rod (502), the bottom end of the lifting control rod (502) is provided with a bearing rod (503), the bottom end of the bearing rod (503) is provided with a loading slot (504), the two ends of the bearing rod (503) are symmetrically provided with threaded holes (505), and the threaded holes (505) are symmetrically provided with the screw holes (506). 5) is connected to the loading slot (504), an auxiliary body (514) is provided at one end of the paint auxiliary plate body (508), a accommodating cavity (509) is provided in the paint auxiliary plate body (508), and the accommodating cavity (509) extends into the auxiliary body (514), a connecting card slot (510) is provided at the cavity opening of the accommodating cavity (509), mounting card slots (511) are symmetrically provided at both ends of the paint auxiliary plate body (508), the connecting card slots (510) are adapted to be snap-fitted with the sealing plate (507), the sealing plate (507) is fixedly provided on the cover plate (506), an auxiliary handle (513) is fixedly provided at one end of the mounting screw (512), a regulating component is provided in the accommodating cavity (509), and a paint auxiliary structure is provided at the bottom end of the auxiliary body (514).

4. The multi-coating processing device for highly resistant waterproof fabric according to claim 3, characterized in that: The auxiliary bodies (514) and the paint auxiliary plate bodies (508) are provided in the same number of groups, and the cross-sectional shape of the end portions of the auxiliary bodies (514) is provided as an isosceles triangle.

5. The multi-coating processing device for highly resistant waterproof fabric according to claim 3, characterized in that: One end of the paint auxiliary plate (508) is adapted to be plugged into the loading slot (504).

6. The multi-coating processing device for highly resistant waterproof fabric according to claim 3, characterized in that: The mounting slots (511) and the threaded holes (505) are arranged at corresponding positions and have the same number of groups, the mounting screws (512) are threadedly connected to the threaded holes (505), and one end of the mounting screws (512) is clipped to the mounting slots (511).

7. The multi-coating processing device for highly resistant waterproof fabric according to claim 3, characterized in that: The regulating component comprises a baffle (601), a material passage trough (602), an inverted cone trough body (603), a movable regulating plate (604), a regulating through slot (605), a telescopic control rod (606), and a connecting plate (607); the baffle (601) is fixedly arranged in the accommodating cavity (509), and the baffle (601) is provided with a material passage trough (602) at an equal distance, and an inverted cone trough body (603) is provided at the notch position of the upper end of the material passage trough (602); the movable regulating plate (604) is arranged in the accommodating cavity (509), and the movable regulating through slot (605) is provided in the movable regulating plate (604) at an equal distance, the movable regulating plate (604) is connected to the telescopic control rod (606), the telescopic control rod (606) is fixedly connected to the connecting plate (607), and the connecting plate (607) is fixed to the coating auxiliary plate (508) by screws.

8. The multi-coating processing device for highly resistant waterproof fabric according to claim 7, characterized in that: The inverted cone trough body (603) and the material trough (602) are arranged in corresponding positions and have the same number of groups. One inverted cone trough body (603) is arranged on one material trough (602). The small end of the inverted cone trough body (603) is connected to the material trough (602), and the large end of the inverted cone trough body (603) is arranged on the baffle (601). The regulating through groove (605) and the material trough (602) are arranged in the same number of groups, and the notches of both the regulating through groove (605) and the material trough (602) are arranged in a circular shape, and the diameters of the notches of the two are arranged to be equal.

9. The multi-coating processing device for highly resistant waterproof fabric according to claim 3, characterized in that: The coating auxiliary structure comprises an arc-shaped auxiliary surface (701), a bottom vertical groove (702), a side oblique groove (703), an auxiliary curved surface (704), a drainage groove (705), and a connecting groove (706); the arc-shaped auxiliary surface (701) is arranged at the bottom end of the auxiliary body (514); the bottom vertical groove (702) is equidistantly arranged at the end position of the bottom end of the auxiliary body (514); the bottom vertical groove (702) is connected to the accommodating cavity (509); the side oblique groove (703) is equidistantly arranged at the bottom end of the auxiliary body (514); 4) The side position of the bottom end, and the side oblique groove (703) is also connected to the accommodating cavity (509), the inner notch position of the bottom vertical groove (702) is provided with an auxiliary curved surface (704), the drainage groove (705) is symmetrically arranged on the arc-shaped auxiliary surface (701), the connecting groove (706) is equidistantly arranged on the arc-shaped auxiliary surface (701), and one end of the connecting groove (706) is connected to the drainage groove (705), and the other end of the connecting groove (706) is connected to the side oblique groove (703).

10. The multi-coating processing device for highly resistant waterproof fabric according to claim 9, characterized in that: The side oblique grooves (703) and the bottom vertical grooves (702) are arranged alternately, and two drainage grooves (705) are symmetrically arranged on the arc-shaped auxiliary surface (701); the connecting grooves (706) are arranged at corresponding positions to the side oblique grooves (703) and have the same number of groups.

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