Cover body structure, tank cover and texturing equipment

Abstract

The utility model discloses a cover body structure, a groove cover and texturing equipment, relates to the technical field of solar cell manufacturing, and provides a technical scheme which can effectively reduce fire risk and does not affect the yield of cells. The cover body structure is applied to the texturing machine table, and comprises a cover body, the air exhaust structures are arranged in at least two areas on the cover body in the extending direction of the cover body, and each air exhaust structure comprises an air exhaust hole and a shielding part shielding the air exhaust hole.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell manufacturing, in particular to a cover structure, a slot cover and a texturing device. Background Art

[0002] At present, rapid texturing technology is mostly used in the flocking process of solar cells. The process time of rapid texturing technology is between 280s and 420s. Under the assistance of high temperature and additives, the silicon wafer reacts violently with sodium hydroxide to produce a large amount of gas. The existing slot cover of the slot type texturing machine is equipped with exhaust holes near the exhaust direction, but the number of exhaust holes is small and the position is single, which makes it impossible to discharge the gas produced by the reaction of alkali and silicon in time, resulting in excessive gas concentration in the slot. When the slot cover is opened, the gas concentration above the slot body reaches the explosion range, posing a fire risk. In addition, there is no obstruction above the hole. During the movement of the robotic arm, dirty substances such as alkali crystals are easily dropped into the slot body when it stops, contaminating the liquid medicine. The minority carrier recombination of dirty spots is large, and the EL imaging is black, affecting the yield and efficiency of the battery cell. Utility Model Content

[0003] The purpose of the utility model is to provide a cover structure, a slot cover and a texturing device, so as to provide a technical solution that can effectively reduce the risk of fire without affecting the yield of the battery cell.

[0004] Based on this, the utility model provides a cover structure, which is applied to a velvet making machine, and the cover structure includes a cover body; along the extension direction of the cover body, the cover body has an exhaust structure arranged in at least two areas on the cover body, and the exhaust structure includes exhaust holes and a shielding component blocking the exhaust holes.

[0005] When the above technical scheme is adopted, the cover body has an exhaust structure arranged in at least two areas on the cover body along the extension direction of the cover body, so that a large amount of gas generated by the texturing process can be discharged from the groove in time, and discharged in time through the exhaust fan of the texturing process, thereby controlling the gas concentration in the texturing process, and stabilizing the hydrogen concentration at the moment the cover structure is opened, thereby solving the problem in the prior art that the number of exhaust holes is small and the position is single, and the gas generated by the reaction of alkali and silicon cannot be discharged in time, resulting in excessive gas concentration in the groove, and the gas concentration above the groove reaches the explosion range at the moment the groove cover is opened, which poses a technical problem of fire risk. The fire risk can be effectively reduced.

[0006] Furthermore, the cover structure in the embodiment of the utility model also includes a shielding component on the exhaust hole, so as to prevent the alkali crystals and other dirty substances carried by the robot arm from falling into the exhaust hole when the robot arm stops during movement, thereby avoiding contamination of the drug solution and solving the technical problem of blackening of EL imaging and affecting the yield and efficiency of the battery cell.

[0007] In one possible implementation, along the extension direction of the cover body, the first end of the cover body has a first exhaust structure, the second end of the cover body has a second exhaust structure, and the middle area from the first end of the cover body to the second end of the cover body has a third exhaust structure.

[0008] When adopting the above technical solution, the utility model is evenly equipped with three exhaust mechanisms along the extension direction of the cover body. When gas is generated in the texturing process, the gas can be discharged from various areas of the cover structure, so as to completely and timely discharge the gas generated in the texturing process, thereby further reducing the risk of fire.

[0009] In a possible implementation, the first exhaust structure includes at least two first exhaust holes, and a first shielding component shielding the at least two first exhaust holes, wherein one side of the first shielding component is rotatably disposed on the cover body.

[0010] In a possible implementation, the second air exhaust structure includes at least two second air exhaust holes and a second shielding component shielding the at least two second air exhaust holes, wherein one side of the second shielding component is rotatably disposed on the cover body.

[0011] In a possible implementation, the third exhaust structure includes at least one row of third exhaust holes, and a third shielding component shielding the at least one row of exhaust holes, wherein one side of the third shielding component is rotatably disposed on the cover body.

[0012] In a possible implementation, the third exhaust structure includes a row of third exhaust holes, and an arrangement direction of the third exhaust holes forms an angle with an arrangement direction of the exhaust holes in the first exhaust structure;

[0013] Alternatively, the third air exhaust structure comprises two rows of third air exhaust holes, and an arrangement direction of the two rows of third air exhaust holes forms an angle with an arrangement direction of the air exhaust holes in the first air exhaust structure.

[0014] In a possible implementation, the first air exhaust structure includes first air exhaust holes arranged in a first direction, and the number of the first air exhaust holes includes 3-5;

[0015] The second air exhaust structure includes second air exhaust holes arranged in the first direction, and the number of the second air exhaust holes includes 3-5;

[0016] The third air exhaust structure includes third air exhaust holes arranged in a second direction, and the number of the third air exhaust holes is 12-16; wherein the first direction is perpendicular to the second direction.

[0017] In a possible implementation, the projection of the shielding component on the cover body covers the corresponding multiple exhaust holes, and the shielding component includes a shielding member and a fixing member, and one side of the shielding member is rotatably mounted on the cover body through the fixing member.

[0018] In a possible implementation, the shielding member includes a right-angle baffle made of acid- and alkali-resistant material, and the material of the fixing member includes acid- and alkali-resistant material.

[0019] In the second aspect, the utility model also provides a slot cover for use in a texturing machine, comprising the two cover structures described in the first aspect, wherein the two cover structures are symmetrically arranged, and each of the cover structures can be rotatably mounted on the texturing slot of the texturing machine.

[0020] In a third aspect, the utility model further provides a texturing device, comprising the slot cover and the texturing slot described in the second aspect, wherein the slot cover is rotatably mounted on the texturing slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0022] Figure 1 A three-dimensional diagram of a cover structure provided by an embodiment of the utility model is shown;

[0023] Figure 2 A top view of a cover structure provided by an embodiment of the utility model is shown.

[0024] Figure numerals: 10 - cover body, 201 - first air exhaust hole, 301 - first shielding component, 202 - second air exhaust hole, 302 - second shielding component, 203 - third air exhaust hole, 303 - third shielding component, 40 - handle. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0029] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] At present, rapid texturing technology is mostly used in the flocking process of solar cells. The process time of rapid texturing technology is between 280s and 420s. Under the assistance of high temperature and additives, the silicon wafer reacts violently with sodium hydroxide to produce a large amount of gas. The existing slot cover of the slot type texturing machine is equipped with exhaust holes near the exhaust direction, but the number of exhaust holes is small and the position is single, which makes it impossible to discharge the gas produced by the reaction of alkali and silicon in time, resulting in excessive gas concentration in the slot. When the slot cover is opened, the gas concentration above the slot body reaches the explosion range, posing a fire risk. In addition, there is no obstruction above the hole. During the movement of the robotic arm, dirty substances such as alkali crystals are easily dropped into the slot body when it stops, contaminating the liquid medicine. The minority carrier recombination of dirty spots is large, and the EL imaging is black, affecting the yield and efficiency of the battery cell.

[0031] Based on this, refer to Figure 1 and Figure 2 An embodiment of the utility model provides a cover structure, which is applied to a velveting machine. The cover structure includes a cover body 10. In practice, one side of the cover body has a mounting hole, and the other side is provided with a handle 40; wherein the mounting hole is used to mount the cover structure on the slot cover, and the handle is used to uncover the cover structure.

[0032] Along the extension direction of the cover body, the cover body 10 has an exhaust structure arranged in at least two areas on the cover body, and the exhaust structure includes an exhaust hole and a shielding component shielding the exhaust hole.

[0033] In the cover structure in the embodiment of the utility model, along the extension direction of the cover body, the cover body has an exhaust structure arranged in at least two areas of the cover body, so that a large amount of gas generated by the texturing process can be discharged from the groove in time, and discharged in time through the exhaust fan of the texturing process, thereby controlling the gas concentration in the texturing process. The hydrogen concentration is stable at the moment the cover structure is opened, thereby solving the problem in the prior art that the number of exhaust holes is small and the position is single, and the gas generated by the reaction of alkali and silicon cannot be discharged in time, resulting in excessive gas concentration in the groove, and the gas concentration above the groove reaches the explosion range at the moment the groove cover is opened, which poses a technical problem of fire risk. The fire risk can be effectively reduced.

[0034] Furthermore, the cover structure in the embodiment of the utility model also includes a shielding component on the exhaust hole, so as to prevent the alkali crystals and other dirty substances carried by the robot arm from falling into the exhaust hole when the robot arm stops during movement, thereby avoiding contamination of the drug solution and solving the technical problem of blackening of EL imaging and affecting the yield and efficiency of the battery cell.

[0035] Specifically, in an embodiment of the utility model, along the extension direction of the cover body, the first end of the cover body has a first exhaust structure, the second end of the cover body has a second exhaust structure, and the middle area from the first end of the cover body to the second end of the cover body has a third exhaust structure.

[0036] Based on this, the embodiment of the utility model is evenly provided with three exhaust mechanisms along the extension direction of the cover body. When gas is generated in the texturing process, the gas can be discharged from various areas of the cover structure, so as to completely and timely discharge the gas generated in the texturing process, thereby further reducing the risk of fire.

[0037] Reference Figure 1 and Figure 2, the first exhaust structure includes at least two first exhaust holes 201, and a first shielding component 301 shielding the at least two first exhaust holes 201, wherein one side of the first shielding component 301 is rotatably disposed on the cover body 10. It should be understood that since the first exhaust structure is used to remove the gas produced by the reaction of alkali and silicon produced in the trough-type wool-making machine, if it is not discharged in time, it may lead to the inability to discharge the gas produced by the reaction of alkali and silicon in time, resulting in excessive gas concentration in the trough, and the gas concentration above the trough body reaches the explosion range at the moment the trough cover is opened, posing a fire risk. Therefore, it is necessary to set a larger number in the first exhaust structure, so the first exhaust structure includes at least two first exhaust holes.

[0038] Based on this, the at least two first exhaust holes are used to exhaust the gas generated in the texturing process. Since the first shielding component shields the at least two first exhaust holes, the first shielding component can completely shield the first exhaust holes, preventing dirty substances such as alkali crystals carried by the robot arm from falling into the exhaust holes when it stops, thereby solving the problem of contaminating the liquid medicine and solving the technical problem of blackening of EL imaging and affecting the yield and efficiency of the battery cell.

[0039] Furthermore, one side of the first shielding component is rotatably disposed on the cover body, so that when exhaust is required, the first shielding component can be opened to discharge the gas generated in the texturing process in time. During the movement of the robotic arm, the first shielding component can be covered on the first exhaust hole to prevent the robotic arm from carrying alkali crystals and other dirty substances and falling into the exhaust hole when it stops.

[0040] Reference Figure 1 and Figure 2 The second exhaust structure includes at least two second exhaust holes 202, and a second shielding component 302 shielding the at least two second exhaust holes 202, wherein one side of the second shielding component 302 is rotatably disposed on the cover body. It should be understood that since the second exhaust structure is used to remove the gas produced by the reaction of alkali and silicon in the trough-type wool-making machine, if it is not discharged in time, it may result in the inability to discharge the gas produced by the reaction of alkali and silicon in time, resulting in excessive gas concentration in the trough, and the gas concentration above the trough body reaches the explosion range at the moment the trough cover is opened, posing a fire risk. Therefore, it is necessary to set a larger number in the second exhaust structure, so the second exhaust structure includes at least two second exhaust holes.

[0041] Based on this, the at least two second exhaust holes are used to exhaust the gas generated in the texturing process. Since the second shielding component shields the at least two second exhaust holes, the second shielding component can completely shield the second exhaust holes, preventing dirty substances such as alkali crystals carried by the robot arm from falling into the exhaust holes when it stops, thereby solving the problem of contaminating the liquid medicine and solving the technical problem of blackening of EL imaging and affecting the yield and efficiency of the battery cell.

[0042] Furthermore, one side of the second shielding component is rotatably disposed on the cover body, so that when exhaust is required, the second shielding component can be opened to discharge the gas generated in the texturing process in time. During the movement of the robotic arm, the second shielding component can be covered on the second exhaust hole to prevent the robotic arm from carrying alkali crystals and other dirty substances and falling into the exhaust hole when it stops.

[0043] Reference Figure 1 and Figure 2 , the third exhaust structure includes at least one row of third exhaust holes 203, and a third shielding component 303 shielding the at least one row of third exhaust holes 203, wherein one side of the third shielding component 303 is rotatably disposed on the cover body. It should be understood that since the third exhaust structure is used to remove the gas produced by the reaction of alkali and silicon in the trough-type wool-making machine, if it is not discharged in time, it may lead to the inability to discharge the gas produced by the reaction of alkali and silicon in time, resulting in excessive gas concentration in the trough, and the gas concentration above the trough body reaches the explosion range at the moment the trough cover is opened, posing a fire risk. Therefore, it is necessary to set a larger number in the third exhaust structure, so the third exhaust structure includes at least two third exhaust holes.

[0044] Based on this, the at least two third exhaust holes are used to exhaust the gas generated in the texturing process. Since the third shielding component shields the at least two third exhaust holes, the third shielding component can completely shield the third exhaust holes, preventing dirty substances such as alkali crystals carried by the robot arm from falling into the exhaust holes when it stops, thereby solving the problem of contaminating the liquid medicine and solving the technical problem of blackening of EL imaging and affecting the yield and efficiency of the battery cell.

[0045] Furthermore, one side of the third shielding component is rotatably disposed on the cover body. Therefore, when exhaust is required, the third shielding component can be opened to discharge the gas generated in the texturing process in time. During the movement of the robotic arm, the third shielding component can be covered on the third exhaust hole to prevent the robotic arm from carrying alkali crystals and other dirty substances and falling into the exhaust hole when it stops.

[0046] In an embodiment of the utility model, the third exhaust structure includes a row of third exhaust holes, and an arrangement direction of the third exhaust holes forms an angle with an arrangement direction of the exhaust holes in the first exhaust structure.

[0047] Alternatively, the third air exhaust structure comprises two rows of third air exhaust holes, and an arrangement direction of the two rows of third air exhaust holes forms an angle with an arrangement direction of the air exhaust holes in the first air exhaust structure.

[0048] It should be understood that the more exhaust holes there are in the cover structure, the better the exhaust effect. However, in practice, the number of the third exhaust holes can be set according to the space of the cover structure. One row of third exhaust holes can be set, or multiple rows of third exhaust holes can be set. The arrangement direction of the third exhaust holes has an angle with the arrangement direction of the exhaust holes in the first exhaust structure, and the angle is generally 90°.

[0049] In a specific embodiment, the first exhaust structure includes first exhaust holes arranged in a first direction, and the number of the first exhaust holes is 3-5.

[0050] The second air exhaust structure includes second air exhaust holes arranged in a first direction, and the number of the second air exhaust holes is 3-5.

[0051] The third air exhaust structure includes third air exhaust holes arranged in a second direction, and the number of the third air exhaust holes is 12-16; wherein the first direction is perpendicular to the second direction.

[0052] The first direction is a direction perpendicular to the extension direction of the cover structure, and the second direction is a direction parallel to the extension direction of the cover structure. Based on this, exhaust holes can be set in various areas of the cover structure to completely exhaust the hydrogen generated by the texturing.

[0053] Specifically, the projection of the shielding component on the cover body covers the corresponding multiple exhaust holes, and the shielding component includes a shielding member and a fixing member, and one side of the shielding member is rotatably mounted on the cover body through the fixing member.

[0054] In practice, the projection of the first shielding component on the cover body covers the corresponding multiple first exhaust holes, and the first shielding component includes a first shielding member and a first fixing member, and one side of the first shielding member is rotatably mounted on the cover body through the first fixing member.

[0055] The projection of the second shielding component on the cover body covers the corresponding multiple second exhaust holes. The second shielding component includes a second shielding member and a second fixing member. One side of the second shielding member is rotatably mounted on the cover body through the second fixing member.

[0056] The projection of the third shielding component on the cover body covers the corresponding multiple third exhaust holes. The third shielding component includes a third shielding member and a third fixing member. One side of the third shielding member is rotatably mounted on the cover body through the third fixing member.

[0057] Furthermore, the shielding member includes a right-angle baffle made of acid- and alkali-resistant material, and the material of the fixing member includes acid- and alkali-resistant material.

[0058] Based on this, when the right-angle baffle is placed on the corresponding exhaust hole, it will not only not affect the exhaust effect of the corresponding exhaust hole, but also prevent the dirty substances such as alkali crystals carried by the robot arm from falling into the exhaust hole when it stops during movement. The right-angle baffle and fixing parts made of acid and alkali resistant materials can adapt to the process environment of the velvet making process.

[0059] In one example, the right-angle baffle is 2 to 3 cm high and 5 to 10 cm wide, which is set according to the size of the exhaust hole. The right-angle baffle is arranged above and below the cover structure and away from the opening and closing axis of the cover structure, and does not affect the normal opening and closing of the cover structure. The right-angle baffle is fixed by a right-angle fixing piece and a nut, which is easy to disassemble and clean during maintenance.

[0060] In a specific embodiment, the current texturing process is: loading - rough polishing - pre-cleaning - water washing - texturing - water washing - post-cleaning - acid washing - water washing - slow pulling - drying - unloading. The cover structure provided by the utility model allows a large amount of hydrogen generated in the process to be discharged from the tank in time and discharged in time through the machine exhaust to control the hydrogen concentration in the machine; the newly added right-angle baffle can be used to prevent the robot arm from dropping dirt into the tank and contaminating the liquid.

[0061] Taking the 4-flower basket specification tank as an example, the existing tank cover has 4 holes on the top near the exhaust port. This solution has 4 symmetrical holes on the bottom of the cover structure and 12-16 holes on the side. The total number of holes in the cover structure increases from 4 to 16-20, greatly increasing the hydrogen discharge rate in the tank.

[0062] The opening of the existing slot cover is not blocked, and a large amount of acid and alkali crystals and organic dirt of additives are attached to the robot during operation. When the robot starts and stops rapidly, the dirt easily falls into the slot through the holes, causing liquid contamination, black spots, pitting, dark spots and other defects, affecting the quality of the battery cells. This new embodiment adds a PVDF right-angle baffle above the exhaust hole in the cover structure, fixed by a fluorine spray right-angle fixing piece and a nut, to prevent dirt from falling into the slot.

[0063] Table 1

[0064]

[0065] As shown in Table 1, it has been determined that the instantaneous hydrogen concentration when the tank cover is opened in the prior art is between 30,000 and 60,000 ppm, which exceeds the explosion limit of 40,000 ppm and poses a risk of electrostatic fire. It has been determined that the instantaneous hydrogen concentration when the cover is opened in the cover structure provided in the embodiment of the utility model is between 2,000 and 5,000 ppm and poses no risk of fire.

[0066] In the second aspect, the embodiment of the utility model also provides a slot cover, which is applied to a velvet making machine, comprising the two cover structures mentioned above, the two cover structures are symmetrically arranged, and each of the cover structures can be rotatably installed on the velvet making slot of the velvet making machine through the corresponding mounting hole.

[0067] Based on this, in the slot cover in the embodiment of the utility model, the cover body has a plurality of exhaust structures along the extension direction of the cover body, so that a large amount of gas generated by the texturing process can be discharged from the slot in time, and discharged in time through the exhaust fan of the texturing process, thereby controlling the gas concentration in the texturing process, and stabilizing the hydrogen concentration at the moment the cover structure is opened, thereby solving the problem in the prior art that the number of exhaust holes is small and the position is single, and the gas generated by the reaction of alkali and silicon cannot be discharged in time, resulting in excessive gas concentration in the slot, and the gas concentration above the slot body reaches the explosion range at the moment the slot cover is opened, which poses a technical problem of fire risk. The fire risk can be effectively reduced.

[0068] Furthermore, the slot cover in the embodiment of the utility model also includes a shielding component on the exhaust hole, so as to prevent the alkali crystals and other dirty substances carried by the robot arm from falling into the exhaust hole when the robot arm stops during movement, thereby avoiding contamination of the drug solution and solving the technical problem of blackening of EL imaging and affecting the yield and efficiency of the battery cell.

[0069] In a third aspect, an embodiment of the utility model further provides a texturing device, comprising the slot cover and the texturing slot, wherein the slot cover is rotatably mounted on the texturing slot.

[0070] It should be understood that the beneficial effects of the texturing equipment in the third aspect include the beneficial effects of the first and second aspects, which will not be repeated here.

[0071] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0072] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A cover structure, characterized in that: Applied in a wool-making machine, the cover structure includes a cover body; along the extension direction of the cover body, the cover body has an exhaust structure arranged in at least two areas on the cover body, and the exhaust structure includes exhaust holes and a shielding component shielding the exhaust holes.

2. The cover structure according to claim 1, characterized in that: Along the extension direction of the cover body, the first end of the cover body has a first exhaust structure, the second end of the cover body has a second exhaust structure, and the middle area from the first end of the cover body to the second end of the cover body has a third exhaust structure.

3. The cover structure according to claim 2, characterized in that: The first air exhaust structure includes at least two first air exhaust holes and a first shielding component shielding the at least two first air exhaust holes, wherein one side of the first shielding component is rotatably disposed on the cover body.

4. The cover structure according to claim 2, characterized in that: The second air exhaust structure includes at least two second air exhaust holes and a second shielding component shielding the at least two second air exhaust holes, wherein one side of the second shielding component is rotatably disposed on the cover body.

5. The cover structure according to claim 2, characterized in that: The third air exhaust structure includes at least one row of third air exhaust holes and a third shielding component shielding the at least one row of third air exhaust holes, wherein one side of the third shielding component is rotatably disposed on the cover body.

6. The cover structure according to claim 5, characterized in that: The third exhaust structure comprises a row of third exhaust holes, and the arrangement direction of the third exhaust holes forms an angle with the arrangement direction of the exhaust holes in the first exhaust structure; Alternatively, the third air exhaust structure comprises two rows of third air exhaust holes, and an arrangement direction of the two rows of third air exhaust holes forms an angle with an arrangement direction of the air exhaust holes in the first air exhaust structure.

7. The cover structure according to claim 2, characterized in that: The first exhaust structure includes first exhaust holes arranged in a first direction, and the number of the first exhaust holes includes 3-5; The second air exhaust structure includes second air exhaust holes arranged in the first direction, and the number of the second air exhaust holes includes 3-5; The third air exhaust structure includes third air exhaust holes arranged in a second direction, and the number of the third air exhaust holes is 12-16; wherein the first direction is perpendicular to the second direction.

8. The cover structure according to any one of claims 1 to 6, characterized in that: The projection of the shielding component on the cover body covers the corresponding multiple exhaust holes. The shielding component includes a shielding member and a fixing member. One side of the shielding member is rotatably mounted on the cover body through the fixing member.

9. The cover structure according to claim 8, characterized in that: The shielding member includes a right-angle baffle made of acid- and alkali-resistant material, and the fixing member is made of acid- and alkali-resistant material.

10. A slot cover, characterized in that: The invention is applied to a texturing machine, comprising two cover structures as described in any one of claims 1 to 8, wherein the two cover structures are symmetrically arranged, and each of the cover structures is rotatably mounted on a texturing slot of the texturing machine.

11. A texturing device, characterized in that: It comprises the slot cover and the texturing slot as claimed in claim 10, wherein the slot cover is rotatably mounted on the texturing slot.

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