Multi-coating process and device for high-resistance waterproof cloth

Abstract

The application relates to the technical field of cloth coating processing, in particular to a multi-coating processing technology and device for high-resistance waterproof cloth, which mainly assists the coating processing of the cloth through the coating processing auxiliary mechanism, after the cloth body is sprayed and conveyed through the coating spraying device and the coating roller, the coating is uniformly distributed through the cooperation of the coating auxiliary plate body and the auxiliary body, and the processing quality is further improved; the accommodating cavity in the coating auxiliary plate body is filled with waterproof coating, so that the processing emergency demand can be coped with; furthermore, the corresponding regulating component is arranged in the accommodating cavity, the regulating component has a regulating effect on the emergency coating and has good working flexibility; the coating auxiliary structure is arranged at the bottom end of the auxiliary body, the coating on the cloth body can be further uniformly distributed, and the application can further meet the waterproof processing and manufacturing demand of the cloth.

Description

Technical Field

[0001] The present invention relates to the technical field of fabric coating processing, and 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. The coating work includes coating processing on both sides and drying work on both sides, and finally the product is finalized by a shaping device. The scheme adopts a combination of multiple coating processes in the coating process. In one 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; then a second coating is performed, the coating effect is more uniform, and the coating situation of the coating device 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 adhered to the fabric surface.

[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 discharge roller, and a receiving roller, a coating workbench is installed between the loading roller and the discharge 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 tank shell, and the inner cavity of the spray tank shell is equipped with a cleaning mechanism; the cleaning mechanism includes a cleaning frame, a brush roller, a slider, a slide, a handle, and a rotating shaft; the slide is opened at the bottom end of the inner cavity of the spray tank shell, the slider is slidably connected to the inside of the slide, 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 tank shell, the handle is installed on the outside of the spray tank shell, and the handle is fixedly connected to the cleaning frame through a connecting rod.

[0004] Regarding the waterproof coating processing work of the fabric, the above two schemes generally require multiple layers of coating to improve the waterproof performance when the waterproof coating is applied to the fabric. In the prior art, the coating needs to be dried in time after coating. This process lacks a corresponding auxiliary mechanism to evenly distribute the coating, which easily causes uneven distribution of the coating on the fabric, and thus 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 processing high-resistance waterproof fabrics to solve the above-mentioned problems. Summary of the Invention

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

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a multi-coating process for highly resistant waterproof fabric, comprising grey fabric production, grey fabric cleaning, primary coating, primary drying, secondary coating, secondary drying, and finished product shaping;

[0008] The coating process is performed by a coating process device provided.

[0009] 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.

[0010] Preferably, the coating processing auxiliary mechanism includes a support 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 support frame is connected to 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, threaded holes are symmetrically provided at both ends of the bearing rod, and the threaded holes are connected to the loading slot, an auxiliary body is provided at one end of the paint auxiliary plate 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 position of the accommodating cavity, mounting card slots are symmetrically provided at both ends of the paint auxiliary plate body, the connecting card slot is adapted to be clamped with the sealing plate, the sealing plate is fixed on the cover plate, an auxiliary handle is fixedly provided on one end of the installation screw, a adjustment component is provided in the accommodating cavity, and a paint auxiliary structure is provided at the bottom end of the auxiliary body.

[0011] Preferably, the auxiliary bodies and the coating auxiliary plate bodies are provided in the same number of groups, and the end cross-sectional shape of the auxiliary bodies is set to be an isosceles triangle.

[0012] Preferably, one end of the paint auxiliary plate is adapted to be plugged into the loading slot.

[0013] Preferably, the mounting slots correspond to the threaded holes in setting positions and are provided in the same number of groups, the mounting screws are adapted to be threadedly connected to the threaded holes, and one end of the mounting screws is adapted to be snap-fitted to the mounting slots.

[0014] 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 the upper end slot of the material trough is provided with an inverted cone trough body, 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.

[0015] Preferably, the inverted cone trough body and the material trough are set in corresponding positions and have the same number of groups. An inverted cone trough body is set on one material trough, the small port of the inverted cone trough body is connected to the material trough, and the large port of the inverted cone trough body is set on the baffle; the regulating through trough and the material trough are set in the same number of groups, and the notches of both the regulating through trough and the material trough are set to be circular, and the notch diameters of the two are set to be equal.

[0016] 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 end of the auxiliary body, the bottom vertical groove is equidistantly arranged at the end position of the bottom end 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 end 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 notch 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.

[0017] Preferably, the side oblique grooves and the bottom vertical grooves are staggered, and two drainage grooves are symmetrically arranged on the arc-shaped auxiliary surface; the connecting grooves are arranged in corresponding positions to the side oblique grooves and are arranged in the same number of groups.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The waterproof fabric processing device designed in the present invention mainly assists the coating processing of the fabric by providing a coating processing auxiliary mechanism. After the fabric body is sprayed and transported by the paint spraying device and the coating roller, the paint is evenly distributed through the cooperation of the paint auxiliary plate and the auxiliary body, thereby further improving its processing quality. The accommodating cavity in the paint auxiliary plate is filled with waterproof paint, which can meet emergency processing needs. Furthermore, a corresponding regulating component is provided in the accommodating cavity, which has a regulating effect on the emergency paint and has good working flexibility. A paint auxiliary structure is provided at the bottom end of the auxiliary body, which can further evenly distribute the paint on the fabric body, 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. The present invention can better meet the needs of fabric waterproof processing and production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the front side of the structural connection of the fabric coating processing device of the present invention;

[0021] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the structural connection at center A;

[0022] Figure 3 This is a schematic diagram of the back side of the structural connection of the fabric coating processing device of the present invention;

[0023] Figure 4 This is an exploded top view of the coating processing auxiliary mechanism of the present invention;

[0024] Figure 5 This is an exploded bottom view of the coating processing auxiliary mechanism of the present invention;

[0025] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structural connection at point B in the middle;

[0026] Figure 7 This is a schematic diagram of the front side of the connection between the coating auxiliary plate and the regulating component structure of the present invention;

[0027] Figure 8 This is a schematic diagram on the left side of the structure connecting the coating auxiliary plate and the regulating component of the present invention;

[0028] Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structural connection at point C in the middle;

[0029] Figure 10 A top view of the connection between the coating auxiliary structure and the local structure of the auxiliary body of the present invention;

[0030] Figure 11 For the present invention Figure 10A magnified schematic diagram of the structural connection at point D in the middle;

[0031] Figure 12 A bottom view of the connection between the coating auxiliary structure and the auxiliary body local structure of the present invention;

[0032] Figure 13 For the present invention Figure 12 Enlarged schematic diagram of the structural connection at E in the middle.

[0033] Figure: 1, paint spraying device; 2, coating roller; 3, drying device; 4, cloth body; 5, coating processing auxiliary mechanism; 501, support frame; 502, lifting control rod; 503, carrying rod; 504, loading slot; 505, threaded hole; 506, cover plate; 507, sealing plate; 508, paint auxiliary plate; 509, receiving cavity; 510, connecting slot; 511, mounting 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

[0034] 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 persons of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0035] Example 1: Please refer to Figures 1-13 , a multi-coating process for highly resistant waterproof fabrics, including grey cloth production, grey cloth cleaning, one-time coating, one-time drying, two-time coating, two-time drying and finished product shaping; the coating process is carried out through a coating processing device.

[0036] 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 coated with paint through the coating roller 2, and 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.

[0037] 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, which can 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.

[0038] 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 slot 510, an installation 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 in with the sealing plate 507, the sealing plate 507 is fixedly set 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; the auxiliary body 514 here is provided with the same number of groups as the paint auxiliary plate 508, and the end cross-sectional shape of the auxiliary body 514 is set to be an isosceles triangle; one end of the paint auxiliary plate 508 here is adapted to be plugged in with the loading slot 504; the mounting slot 511 here corresponds to the setting position of the threaded hole 505 and is provided with the same number of groups, the mounting screw 512 is adapted to be threadedly connected with the threaded hole 505, and one end of the mounting screw 512 is adapted to be snapped in with the mounting slot 511.

[0039] 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 evenly processed on the paint on the fabric body 4.

[0040] Example 3: Based on Example 2, please refer to Figure 7-Figure 9 , the regulating components here 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 a 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 a regulating through slot 605, the movable regulating plate 604 is connected to the telescopic control rod 606, and the telescopic control 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.

[0041] 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 channel 602 on the baffle 601 or the overlapping size of the regulating channel 605 on the movable regulating plate 604 and the material channel 602 to control the material flow, wherein the accommodating cavity 509 in the paint auxiliary plate 508 is filled with waterproof paint, which can meet the emergency needs of processing.

[0042] Example 4: Based on Example 3, please refer to Figure 10-13The coating auxiliary structure here 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 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, 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 end of the auxiliary body 514, and the side oblique groove 703 is also connected to the accommodating cavity 509, the bottom vertical groove 702 is equidistantly arranged at the side position of the bottom end of the auxiliary body 514, and the side oblique groove 703 is also connected to the accommodating cavity 509, 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.

[0043] In this embodiment, the bottom end surface of the auxiliary body 514 is set as an arc-shaped auxiliary surface 701, which makes the contact between the auxiliary body 514 and the cloth softer and minimizes scratches on the cloth while ensuring uniform coating.

[0044] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multi-coating processing device 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 provided; 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 cloth body (4), and the cloth body (4) passes through the coating roller (2) for coating transportation, the coating processing auxiliary mechanism (5) performs auxiliary coating processing on the cloth body (4), and then the cloth body (4) passes through the drying device (3) for drying processing; The coating processing auxiliary mechanism (5) 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 slot (510), an installation 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 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 connected to the loading slot (504), and the coating auxiliary structure is provided with a supporting structure. An auxiliary body (514) is provided at one end of the auxiliary plate (508), a housing cavity (509) is provided in the paint auxiliary plate (508), and the housing cavity (509) extends into the auxiliary body (514), a connection slot (510) is provided at the cavity opening of the housing cavity (509), mounting slots (511) are symmetrically provided at both ends of the paint auxiliary plate (508), the connection slots (510) are adapted to be engaged 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 housing cavity (509), and a paint auxiliary structure is provided at the bottom end of the auxiliary body (514), which can further evenly distribute the paint on the main body of the cloth and recycle part of the paint on the basis of ensuring even coating; 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), and the bottom vertical groove (702) is connected to the accommodating cavity (509), and 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), 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 to the drainage groove (705), and the other end of the connecting groove (706) is connected to the side oblique groove (703).

2. The multi-coating processing device for highly resistant waterproof fabric according to claim 1, characterized in that: The auxiliary bodies (514) and the coating auxiliary plate bodies (508) are provided in the same number of groups, and the end cross-sectional shape of the auxiliary bodies (514) is provided as an isosceles triangle.

3. The multi-coating device for processing highly resistant waterproof fabrics according to claim 1, characterized in that: One end of the paint auxiliary plate (508) is adapted to be plugged into the loading slot (504).

4. The multi-coating device for processing highly resistant waterproof fabrics according to claim 1, 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 screw (512) is snap-connected to the mounting slots (511).

5. The multi-coating processing device for highly resistant waterproof fabric according to claim 1, characterized in that: The regulating assembly comprises 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 provided with a material trough (602) at an equal distance, and the upper end notch 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 provided with a regulating through-slot (605) 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.

6. The multi-coating device for processing highly resistant waterproof fabrics according to claim 5, 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 trough (605) and the material trough (602) are arranged in the same number of groups, and the notches of both the regulating through trough (605) and the material trough (602) are arranged in a circular shape, and the diameters of the notches of the two are set to be equal.

7. The multi-coating processing device for highly resistant waterproof fabric according to claim 1, characterized in that: The side oblique grooves (703) and the bottom vertical grooves (702) are arranged in an alternating manner, and two drainage grooves (705) are symmetrically arranged on the arc-shaped auxiliary surface (701); the connecting grooves (706) are arranged in positions corresponding to the side oblique grooves (703) and are arranged in the same number of groups.

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