Negative pressure conveying device

Abstract

The utility model provides a negative pressure conveying device which comprises a base body, a negative pressure cavity is formed in the base body, and an air inlet communicated with the negative pressure cavity is formed in one side of the base body. The conveying belt is provided with a first surface and a second surface which are oppositely arranged in the thickness direction of the conveying belt, the first surface faces the air inlet, the second surface is used for conveying materials, the conveying belt is provided with a plurality of adsorption holes, first hole openings of the adsorption holes are communicated with the air inlet, and second hole openings of the adsorption holes are communicated with the air outlet. Second orifices of the adsorption holes are formed in the second surface; and the bluff body is arranged between the air inlet and the adsorption holes so as to reduce the air flow entering the negative pressure cavity from the adsorption holes. According to the negative pressure conveying device, the uniformity of negative pressure in the negative pressure cavity can be effectively improved through the arranged bluff body, the adsorption force of the adsorption holes can be balanced, and therefore the reliability of the negative pressure conveying device can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of negative pressure conveying, and more specifically, to a negative pressure conveying device. Background Art

[0002] During the battery production process, a conveying device is generally used to transport the cut electrode sheets to the designated location. Because the electrode sheets are very thin and light, the conveying device is required to provide a certain adsorption force to hold the electrode sheets.

[0003] In the related art, a vacuum belt is usually used for transportation. However, the suction uniformity generated by the vacuum cavity structure near the vacuum belt is poor, and the electrode is prone to deflection, falling, curling, etc. during transportation, resulting in poor reliability. Utility Model Content

[0004] The utility model provides a new technical solution for a negative pressure conveying device, which can at least solve the problem of poor reliability of the existing conveying device.

[0005] According to the first aspect of the utility model, a negative pressure conveying device is provided, comprising: a base body, a negative pressure cavity is provided in the base body, an air inlet connected to the negative pressure cavity is provided on one side of the base body; a conveyor belt, the conveyor belt has a first surface and a second surface arranged opposite to each other in the thickness direction, the first surface faces the air inlet, the second surface is used for conveying materials, the conveyor belt is provided with a plurality of adsorption holes, the first orifice of the adsorption hole is connected to the air inlet, and the second orifice of the adsorption hole is provided on the second surface; a bluff body, the bluff body is provided between the air inlet and the adsorption hole to reduce the amount of air entering the negative pressure cavity from the adsorption hole.

[0006] Optionally, the bluff body is in contact with the first surface and / or a surface of the substrate.

[0007] Optionally, the bluff body is a porous medium layer or a flexible air-permeable layer, and the bluff body blocks the air inlet.

[0008] Optionally, the bluff body blocks a portion of the first opening of the adsorption hole.

[0009] Optionally, the negative pressure delivery device further comprises: at least one supporting rib, wherein the supporting rib is arranged in the negative pressure chamber, and a supporting surface of the supporting rib is in contact with the bluff body.

[0010] Optionally, the support rib is provided with a plurality of ventilation holes, a first opening of the ventilation hole is provided on the support surface, and a second opening of the ventilation hole is communicated with the adsorption hole.

[0011] Optionally, the negative pressure delivery device also includes: at least one supporting rib, wherein the supporting rib is arranged on the inner wall surface of the negative pressure chamber, wherein the supporting rib divides the negative pressure chamber into a plurality of cavities, and wherein the supporting rib is provided with a plurality of first connecting holes penetrating along the thickness direction thereof, wherein the first connecting holes connect the plurality of cavities.

[0012] Optionally, the negative pressure delivery device also includes: a support plate, wherein the support plate is located between the negative pressure chamber and the bluff body, the support plate is connected to the base, the support plate and the bluff body are in contact with each other on the surface in the thickness direction thereof, and the support plate is provided with a plurality of second connecting holes penetrating along the thickness direction thereof, and the second connecting holes are connected to the negative pressure chamber.

[0013] Optionally, the bluff body is configured to filter the gas entering the negative pressure chamber from the adsorption hole.

[0014] Optionally, the bluff body is detachably connected to the base body.

[0015] Optionally, a sealing portion is provided at an edge of the bluff body, and the sealing portion is suitable for sealing the edge of the bluff body and / or a gap between the bluff body and the substrate.

[0016] Optionally, the adsorption holes include first adsorption holes and second adsorption holes, and the conveyor belt is provided with a first functional segment and a second functional segment distributed along its width direction, wherein the first functional segment is provided with a plurality of the first adsorption holes, and the first adsorption holes are suitable for adsorbing the first part of the material, and the second functional segment is provided with a plurality of the second adsorption holes, and the second adsorption holes are suitable for adsorbing the second part of the material, and the aperture diameters of the first adsorption holes and the second adsorption holes are different, and / or the number of the first adsorption holes and the second adsorption holes per unit area is different.

[0017] According to the negative pressure conveying device of the utility model, the baffle body is provided to reduce the amount of air entering the negative pressure chamber from the adsorption holes on the conveyor belt that are not covered by the material, so that the air flow velocity inside the negative pressure chamber is relatively small, which can effectively improve the uniformity of the negative pressure inside the negative pressure chamber, and balance the adsorption force of multiple adsorption holes, thereby effectively improving the reliability of the negative pressure conveying device.

[0018] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0020] Figure 1It is a partial structural schematic diagram of a negative pressure delivery device according to an embodiment of the utility model;

[0021] Figure 2 is a partial structural schematic diagram of a negative pressure delivery device according to another embodiment of the utility model;

[0022] Figure 3 is a schematic diagram of the structure inside the negative pressure chamber of a negative pressure delivery device according to another embodiment of the utility model;

[0023] Figure 4 It is a partial structural schematic diagram of a conveyor belt of a negative pressure conveying device according to an embodiment of the utility model;

[0024] Figure 5 It is a partial structural schematic diagram of a conveyor belt of a negative pressure conveying device according to another embodiment of the utility model;

[0025] Figure 6 It is a structural schematic diagram of the matching part of the negative pressure delivery device and the pole piece according to an embodiment provided by the utility model;

[0026] Figure 7 It is a structural schematic diagram of a negative pressure delivery device according to an embodiment of the utility model;

[0027] Figure 8 is a schematic structural diagram of a negative pressure delivery device according to another embodiment of the present utility model;

[0028] Fig. 9 This is a schematic diagram of the structure of the base and support plate of a negative pressure delivery device according to an embodiment of the present invention.

[0029] Fig.10 It is a simplified model diagram of a negative pressure delivery device according to an embodiment of the present utility model.

[0030] Fig.11 It is the velocity cloud diagram of the simulation results of the simplified model under the first working condition;

[0031] Fig.12 It is the pressure cloud diagram of the simulation results of the simplified model under the first working condition;

[0032] Fig.13 It is the velocity cloud diagram of the simulation results of the simplified model under the second working condition;

[0033] Fig.14 It is the pressure cloud diagram of the simulation results of the simplified model under the second working condition;

[0034] Fig.15 It is the velocity cloud diagram of the simulation results of the simplified model under the third working condition;

[0035] Fig.16 It is the pressure cloud diagram of the simulation results of the simplified model under the third working condition;

[0036] Fig.17 It is the velocity cloud diagram of the simulation results of the simplified model under the fourth working condition;

[0037] Fig.18 It is the pressure cloud diagram of the simulation results of the simplified model under the fourth working condition;

[0038] Fig.19 It is a graph showing the variation of the adsorption force non-uniformity of the adsorption pores with the resistance coefficient of the bluff body;

[0039] Fig. 20 It is a graph showing the variation of the adsorption force of the adsorption pores with the resistance coefficient of the bluff body.

[0040] Reference numerals

[0041] Negative pressure delivery device 100;

[0042] Base 10; negative pressure chamber 11; support ribs 12; air inlet 13;

[0043] Baffle body 20;

[0044] Conveyor belt 30; adsorption hole 31; first adsorption hole 311; second adsorption hole 312;

[0045] A first roller 40; a second roller 50; a third roller 60; a support plate 70;

[0046] Pole piece 200 ; main body 210 ; pole ear 220 . DETAILED DESCRIPTION

[0047] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0048] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0049] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0050] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0051] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0052] The following first describes in detail the negative pressure delivery device 100 according to an embodiment of the present utility model in conjunction with the accompanying drawings.

[0053] like Figures 1 to 9 As shown, the negative pressure conveying device 100 according to the embodiment of the utility model includes: a base 10, a conveying belt 30 and a bluff body 20.

[0054] Specifically, a negative pressure chamber 11 is provided in the base 10, and an air inlet connected to the negative pressure chamber 11 is provided on one side of the base 10. The conveyor belt 30 has a first surface and a second surface arranged opposite to each other in the thickness direction thereof, the first surface faces the air inlet, and the second surface is used to convey materials. The conveyor belt 30 is provided with a plurality of adsorption holes 31, the first orifice of the adsorption hole 31 is connected to the air inlet, and the second orifice of the adsorption hole 31 is arranged on the second surface. The resistant body 20 is arranged between the air inlet and the adsorption hole 31 to reduce the amount of air entering the negative pressure chamber 11 from the adsorption hole 31.

[0055] In other words, if Figures 1 to 9 As shown, the negative pressure conveying device 100 according to the embodiment of the utility model mainly includes a base 10, a conveyor belt 30 and a bluff body 20, wherein the base 10 includes a plurality of walls, and the base 10 can define a negative pressure chamber 11 with an air inlet through the plurality of walls, wherein one of the walls is provided with an air inlet 13 penetrating the wall, so that the air inlet 13 is connected to the negative pressure chamber 11. The air inlet 13 can be connected to a fan, and the negative pressure chamber 11 can generate negative pressure by exhausting air from the fan.

[0056] The conveyor belt 30 has a first surface and a second surface that are relatively arranged in its thickness direction. The conveyor belt 30 is also provided with a plurality of adsorption holes 31 that penetrate along its thickness direction. The first opening of the adsorption hole 31 is located on the first surface of the conveyor belt 30, and the second opening of the adsorption hole 31 is located on the second surface of the conveyor belt 30.

[0057] Specifically, the conveyor belt 30 can be in a long strip or annular shape. When the conveyor belt 30 is annular, the inner circumference of the conveyor belt 30 is the first surface, and the outer circumference of the conveyor belt 30 is the second surface. The base 10 can be arranged on the inner circumference of the conveyor belt 30, with the first surface facing the air inlet, and the first orifice of the adsorption hole 31 is connected to the air inlet, so that the negative pressure chamber 11 can be used to provide adsorption force for the adsorption hole 31. When conveying materials, the adsorption hole 31 can adsorb the materials on the second surface of the conveyor belt 30.

[0058] The bluff body 20 is arranged between the air inlet and the adsorption holes 31. For example, the bluff body 20 can be arranged on the first surface of the conveyor belt 30, or on the surface of the substrate 10 close to the air inlet. The bluff body 20 can to a certain extent hinder the gas from flowing into the negative pressure chamber 11 from the adsorption holes 31 not covered by the material, thereby reducing the amount of air entering the negative pressure chamber 11 from the adsorption holes 31, so that the negative pressure in the negative pressure chamber 11 can always be maintained at a high level. The adsorption holes 31 covered by the material do not leak, so the negative pressure in the adsorption holes 31 is equal to the negative pressure in the negative pressure chamber 11. The adsorption force of the adsorption holes 31 for the material can be maintained at a very high level, and the material can be firmly sucked. When the number of adsorption holes 31 of the conveyor belt 30 covered by the material is small, the adsorption force of the adsorption holes 31 for the material can still be maintained at a high level.

[0059] At the same time, the bluff body 20 can make the air flow velocity inside the negative pressure chamber 11 relatively small, thereby ensuring the uniformity of the negative pressure inside the negative pressure chamber 11, and further balancing the adsorption force of multiple adsorption holes 31, so that the adsorption holes 31 at different positions have relatively good adsorption force.

[0060] Furthermore, since the baffle body 20 can effectively reduce the air flow rate of each adsorption hole 31, less gas enters the negative pressure chamber 11 per unit time. After the fan is turned on, the gas inside the negative pressure chamber 11 can be quickly discharged, which is conducive to the rapid formation of negative pressure in the negative pressure chamber 11, thereby improving the transient performance of the negative pressure delivery device 100.

[0061] Therefore, according to the negative pressure conveying device 100 provided in this embodiment, the baffle body 20 is set to reduce the amount of air entering the negative pressure chamber 11 from the adsorption holes 31 not covered by the material on the conveyor belt 30, so that the air flow rate inside the negative pressure chamber 11 is relatively small, which can effectively improve the uniformity of the negative pressure inside the negative pressure chamber 11, and balance the adsorption force of multiple adsorption holes 31, thereby effectively improving the reliability of the negative pressure conveying device 100.

[0062] In the related art, the higher the height H of the negative pressure chamber 11, the better the uniformity of the negative pressure inside the negative pressure chamber 11, and the air flow velocity V in the negative pressure chamber 11 = Q / S, where S is the cross-sectional area of ​​the negative pressure chamber 11; in the present embodiment, when the resistance coefficient of the bluff body 20 is larger, the smaller the air flow Q passing through the negative pressure chamber 11, the smaller the flow velocity V, and accordingly, the better the uniformity of the negative pressure in the negative pressure chamber 11, so while ensuring the uniformity of the negative pressure in the negative pressure chamber 11, the height of the negative pressure chamber 11 can be reduced.

[0063] That is to say, by providing the bluff body 20 , H can be appropriately reduced while ensuring uniformity, thereby facilitating reduction in the volume of the negative pressure delivery device 100 .

[0064] According to an embodiment of the present invention, the bluff body 20 is in contact with the first surface and / or the surface of the substrate 10 .

[0065] In other words, the bluff body 20 can be in contact with the first surface of the conveyor belt 30 , thereby ensuring the airflow blocking effect of the bluff body 20 and effectively preventing the suction force of the adsorption holes 31 from fluctuating.

[0066] Furthermore, the bluff body 20 is respectively in contact with the first surface of the conveyor belt 30 and the surface of the substrate 10 on both sides in the thickness direction, which can further ensure the bluff body 20's blocking effect on the airflow.

[0067] In some embodiments of the present invention, the bluff body 20 is a porous medium layer or a flexible air-permeable layer, and the bluff body 20 blocks the air inlet.

[0068] Specifically, the bluff body 20 is a porous medium layer. For example, the porous medium layer may be a powder metallurgy porous material processed by powder metallurgy. This structure can make the bluff body 20 have sufficient rigidity, which is conducive to cooperation with the conveyor belt 30 .

[0069] Optionally, the bluff body 20 is a flexible breathable layer. For example, the flexible breathable layer may be a textile material, which has a simple structure and low cost, and can effectively reduce production costs.

[0070] Therefore, the bluff body 20 can be used to block the air inlet of the negative pressure chamber 11, thereby effectively reducing the amount of air entering the negative pressure chamber 11 from the adsorption holes 31, thereby balancing the adsorption forces of the multiple adsorption holes 31 and improving the adsorption forces of the adsorption holes 31.

[0071] It should be noted that the specific material of the bluff body 20 can be determined according to actual needs, and will not be described in detail in this embodiment.

[0072] According to an embodiment of the present invention, the bluff body 20 blocks a portion of the first opening of the adsorption hole 31 .

[0073] In this embodiment, the amount of air entering the negative pressure chamber 11 from the adsorption hole 31 can be reduced by shielding a portion of the first orifice of the adsorption hole 31 by the bluff body 20. For example, the bluff body 20 can be formed as a plate body, and the plate body is provided with a plurality of through holes along its thickness direction, and the aperture of the through holes is smaller than the diameter of the adsorption hole 31, and one adsorption hole can correspond to a plurality of through holes, thereby the portion of the bluff body 20 without the through holes can be used to shield a portion of the first orifice of the adsorption hole 31, thereby reducing the flow area of ​​the first orifice of the adsorption hole 31, and further effectively reducing the amount of air entering the negative pressure chamber 11 from the adsorption hole 31.

[0074] In some embodiments of the present invention, the negative pressure delivery device 100 further includes: at least one supporting rib 12 , and a supporting surface of the supporting rib 12 is in contact with the bluff body 20 .

[0075] That is to say, Figure 2 and Figure 3 As shown, when the rigidity of the bluff body 20 is insufficient, for example, when the bluff body 20 is a flexible breathable layer, one or more support ribs 12 can be provided on the inner wall surface of the negative pressure chamber 11, and the support ribs 12 are provided with a support surface in the height direction of the negative pressure chamber 11, and the support surface is in contact with the bluff body 20, so that the shape of the bluff body 20 can be maintained by the support ribs 12, and the airflow blocking effect of the bluff body 20 can be ensured.

[0076] In this way, the normal operation of the negative pressure delivery device 100 can be ensured, and the reliability of the negative pressure delivery device 100 can be effectively improved.

[0077] It should be noted that the number and positions of the support ribs 12 can be arranged according to the stiffness of the bluff body 20 , which will not be described in detail in this embodiment.

[0078] According to an embodiment of the utility model, the support rib 12 is provided with a plurality of ventilation holes, a first opening of the ventilation hole is provided on the support surface, and a second opening of the ventilation hole is communicated with the negative pressure chamber 11 .

[0079] In order to ensure the air permeability of the resistant body 20, the support rib 12 can be provided with a plurality of air holes in the height direction of the negative pressure chamber 11, and the air holes penetrate the support rib 12. The first opening of the air hole is located on the supporting surface of the support rib 12, and the second opening of the air hole is connected to the negative pressure chamber 11. This can ensure that the resistant body 20 has good air permeability in the area where the support rib 12 is located, so that the adsorption holes 31 in the area where the support rib 12 is located can be connected to the negative pressure chamber 11, thereby ensuring that the adsorption holes 31 in the area where the support rib 12 is located also have good adsorption force.

[0080] Optionally, the opening area of ​​the plurality of vent holes is not less than 85% of the area of ​​the side surface of the support rib 12 in contact with the bluff body 20 , thereby ensuring the air permeability of the bluff body 20 .

[0081] In some embodiments of the utility model, the negative pressure delivery device 100 also includes: at least one support rib 12, the support rib 12 is arranged on the inner wall surface of the negative pressure chamber 11, the support rib 12 divides the negative pressure chamber 11 into multiple cavities, and the support rib 12 is provided with multiple first connecting holes passing through the thickness direction thereof, and the first connecting holes connect the multiple cavities.

[0082] Specifically, Figure 3As shown, the width and length of the negative pressure chamber 11 can be adjusted according to the size of the material to ensure that the opening area of ​​the conveyor belt 30 can cover the material. When the width and length of the negative pressure chamber 11 are large, one or more support ribs 12 can be provided on the inner wall surface of the negative pressure chamber 11. The support ribs 12 can play a reinforcing role, which can prevent the wall surface of the negative pressure chamber 11 from deforming under the action of negative pressure, and is conducive to maintaining the shape of the negative pressure chamber 11. The support ribs 12 can separate the negative pressure chamber 11 into multiple cavities, and each support rib 12 is respectively provided with multiple first connecting holes running through the thickness direction thereof, and each cavity can be connected through the first connecting holes, thereby ensuring the uniformity of the pressure inside the negative pressure chamber 11. In this embodiment, the support rib 12 is also provided with a support surface in the height direction of the negative pressure chamber 11, and the support surface is in contact with the bluff body 20.

[0083] Optionally, the opening area of ​​the plurality of first communication holes is not less than 70% of the side area of ​​the plurality of support ribs 12 .

[0084] In some embodiments of the utility model, the negative pressure delivery device 100 also includes: a support plate 70, the support plate 70 is located between the negative pressure chamber 11 and the resistant body 20, the support plate 70 is connected to the base 10, the support plate 70 and the resistant body 20 are in contact with each other on the surface in the thickness direction thereof, and the support plate 70 is provided with a plurality of second connecting holes 71 penetrating along the thickness direction thereof, and the second connecting holes 71 are connected to the negative pressure chamber 11.

[0085] Specifically, Fig. 9 As shown, a support plate 70 is fixedly connected to the surface of the substrate 10 close to the bluff body 20, and the first surface of the support plate 70 in the thickness direction faces the negative pressure chamber 11, and the second surface of the support plate 70 in the thickness direction is in contact with the bluff body 20, so that the shape of the bluff body 20 can be maintained by the support plate 70; and the support plate 70 is provided with a plurality of second connecting holes 71 penetrating along the thickness direction thereof, and the second connecting holes 71 are connected to the negative pressure chamber 11, so as to ensure that the gas can pass through the support plate 70, thereby ensuring the normal use of the negative pressure delivery device 100.

[0086] In this embodiment, the support plate 70 can also strengthen the base body 10 at the air inlet, which is beneficial to maintaining the shape of the negative pressure chamber 11.

[0087] It should be noted that the size of the second communication hole 71 can be determined according to factors such as the material and structure of the bluff body 20 , which will not be described in detail in this embodiment.

[0088] According to an embodiment of the present invention, the bluff body 20 is configured to filter the gas entering the negative pressure chamber 11 through the adsorption holes 31 .

[0089] That is to say, the baffle body 20 can constitute a structure suitable for filtering gas. For example, the baffle body 20 is formed as a porous medium layer or a flexible air-permeable layer, so as to effectively prevent dust from entering the negative pressure chamber 11 and entering the negative pressure pipeline of the negative pressure delivery device 100 through the negative pressure chamber 11, thereby effectively improving the reliability of the negative pressure delivery device 100.

[0090] In some embodiments of the present invention, the bluff body 20 is detachably connected to the base body 10 .

[0091] Specifically, the bluff body 20 and the base body 10 can be detachably connected together by other fixing members, such as screws, so that the bluff body 20 can be replaced. When the performance of the bluff body 20 deteriorates, for example, when the bluff body 20 filters gas for a long time, resulting in an excessively large resistance coefficient, the bluff body 20 can be replaced to ensure the normal operation of the negative pressure delivery device 100.

[0092] According to an embodiment of the present invention, a sealing portion is provided at the edge of the bluff body 20 , and the sealing portion is suitable for sealing the edge of the bluff body 20 and / or the gap between the bluff body 20 and the substrate 10 .

[0093] In this embodiment, in order to prevent gas from entering the negative pressure chamber 11 from the edge of the bluff body 20, a sealing portion is provided at the edge of the bluff body 20, and the sealing portion may be silica gel. For example, when the bluff body 20 is a porous medium layer, the sealing portion may be used to block the porous structure at the edge of the porous medium layer, thereby preventing gas from entering the negative pressure chamber 11 from the edge of the bluff body 20.

[0094] Furthermore, when the bluff body 20 and the substrate 10 are connected, there may be a certain gap between the connecting surfaces of the two, and thus the sealing part can be used to seal them, thereby preventing gas from entering the negative pressure cavity 11 from the edge of the bluff body 20, thereby preventing the suction force of the adsorption holes 31 that are close to the edge of the bluff body 20 from being reduced.

[0095] In some embodiments of the utility model, the adsorption hole 31 includes a first adsorption hole 311 and a second adsorption hole 312, and the conveyor belt 30 is provided with a first functional section and a second functional section distributed along its width direction, wherein the first functional section is provided with a plurality of first adsorption holes 311, and the first adsorption holes 311 are suitable for adsorbing the first part of the material, and the second functional section is provided with a plurality of second adsorption holes 312, and the second adsorption holes 312 are suitable for adsorbing the second part of the material, and the apertures of the first adsorption holes 311 and the second adsorption holes 312 are different, and / or the number of the first adsorption holes 311 and the second adsorption holes 312 per unit area is different.

[0096] That is to say, Figure 5As shown, the conveyor belt 30 has a first functional segment and a second functional segment, and the first functional segment and the second functional segment are distributed along the width direction of the conveyor belt 30. The adsorption holes 31 on the conveyor belt 30 are divided into first adsorption holes 311 and second adsorption holes 312. A plurality of first adsorption holes 311 can be evenly distributed on the first functional segment, and a plurality of second adsorption holes 312 can be evenly distributed on the second functional segment.

[0097] It should be noted that the number of the first adsorption holes 311 and the second adsorption holes 312 per unit area, and the sizes of the first adsorption holes 311 and the second adsorption holes 312 can be determined according to actual needs.

[0098] like Figure 5 As shown, for example, when conveying the electrode piece 200, since the main body 210 (first part) of the electrode piece 200 is larger and harder, and the electrode ear 220 (second part) is smaller and softer, the corners of the electrode ear 220 are prone to curling. Therefore, the first adsorption hole 311 on the first functional segment can be designed as a hole with a larger aperture and a sparser arrangement, providing a sufficiently large adsorption force to suck the electrode piece 200, and the second adsorption hole 312 on the second functional segment can be set as a hole with a smaller aperture and a denser arrangement. A single second adsorption hole 312 with a small aperture has a small adsorption force and will not suck the electrode ear 220. Moreover, the second adsorption hole 312 with a smaller aperture is conducive to a tighter arrangement, which can produce a more uniform adsorption force, and can make the second adsorption hole 312 closer to the edge corner of the electrode ear 220, which can effectively avoid curling at the sharp corner of the electrode ear 220.

[0099] In some examples of the present invention, the conveyor belt 30 forms a ring shape, and the inner periphery of the conveyor belt 30 is provided with a first roller 40 and a second roller 50 rotatable around its own axis, wherein the first roller 40 and the second roller 50 are spaced apart along the length direction of the negative pressure chamber 11, the base 10 is located between the first roller 40 and the second roller 50, and the first roller 40 and the second roller 50 are respectively matched with the conveyor belt 30.

[0100] like Figure 7 and Figure 8 As shown, the inner side of the conveyor belt 30 is also provided with a third roller 60 which rotates around its own axis. The third roller 60 is spaced apart from the first roller 40 and the second roller 50 in the height direction of the negative pressure chamber 11, and the third roller 60 cooperates with the conveyor belt 30. The third roller 60 can be connected to a motor, so that the third roller 60 can be driven to rotate by the motor. When the third roller 60 rotates, the conveyor belt 30 can be driven to move, so that the conveyor belt 30 can transport materials in the length direction of the negative pressure chamber 11.

[0101] like Figure 7 and Figure 8As shown, during the operation of the negative pressure conveying device 100 according to the embodiment of the utility model, the base 10 and the bluff body 20 are in a stationary state, and the conveyor belt 30 is driven to move by the third roller 60. During the movement of the conveyor belt 30, the first surface of the conveyor belt 30 is in close contact with the bluff body 20 under the action of negative pressure. When the material covers the adsorption holes 31, the adsorption holes 31 are formed into a hole cavity. The internal negative pressure of the negative pressure cavity 11 is transmitted to the inside of the hole cavity through the bluff body 20 to form a negative pressure, which generates an adsorption force on the material, thereby adsorbing and fixing the material, and further, adsorption and fixing can be achieved in the process of the material being transported from the first end of the negative pressure cavity 11 in the length direction to the second end of the negative pressure cavity 11 in the length direction; and during the conveying process, the wind pressure can be adjusted by changing the fan speed, thereby adjusting the adsorption force of the adsorption holes 31, which is simple and convenient.

[0102] The following is a simulation description of a simplified model of the negative pressure delivery device 100 of any of the above embodiments. The simulation adopts the multiple reference frame (MRF) model in Fluent, and the pole piece 200 is in relative motion.

[0103] like Fig.10 As shown, the resistant body 20 is arranged above the negative pressure chamber 11, an air intake port 13 is provided at the lower left corner of the negative pressure chamber 11, and 12 adsorption holes 31 are arranged above the resistant body 20. The fourth to ninth adsorption holes 31 absorb materials and are covered by the pole piece 200 to be airtight; the first to third adsorption holes 31 and the tenth to twelfth adsorption holes 31 are not covered by the pole piece 200.

[0104] When simulating with Fluent software, the air inlet 13 is set to -5000Pa, the covered adsorption hole 31 is set to the wall surface, no gas enters, and the uncovered adsorption hole 31 is set to the ambient atmospheric pressure, air flows in.

[0105] The calculation formula for the unevenness of adsorption force is: ε=(F max -F MGM ) / F max , where F max is the maximum adsorption force of the adsorption hole 31, F min is the minimum value of the adsorption force of the adsorption hole 31.

[0106] When the bluff body 20 is not set, that is, the drag coefficient is 0, the velocity cloud map and pressure cloud map of the simulation result are as follows: Fig.11 and Fig.12 shown.

[0107] When the bluff body 20 is provided and the drag coefficient is small, the velocity cloud diagram and the pressure cloud diagram of the simulation result are as follows: Fig.13 and Fig.14 shown.

[0108] When the bluff body 20 is provided and the drag coefficient is medium, the velocity cloud diagram and the pressure cloud diagram of the simulation result are as follows: Fig.15 and Fig.16 shown.

[0109] When the bluff body 20 is provided and the drag coefficient is large, the velocity cloud diagram and the pressure cloud diagram of the simulation result are as follows: Fig.17 and Fig.18 shown.

[0110] like Fig.19 and Fig. 20 As shown, according to the simulation results, a graph showing the variation of the adsorption force non-uniformity of the adsorption hole 31 with the resistance coefficient of the bluff body 20 and a graph showing the variation of the adsorption force magnitude of the adsorption hole 31 with the resistance coefficient of the bluff body 20 can be obtained. Fig.19 and Fig. 20 In the horizontal axis, 1 represents that no bluff body 20 is provided, 2 represents that the resistance coefficient of the bluff body 20 is small, 3 represents that the resistance coefficient of the bluff body 20 is medium, and 4 represents that the resistance coefficient of the bluff body 20 is large.

[0111] It can be seen from this that when the bluff body 20 is not provided, the negative pressure inside the negative pressure chamber 11 is very small, the farther away from the air inlet 13, the smaller the negative pressure is, and the negative pressure is larger near the air inlet 13. The pressure inside the negative pressure chamber 11 is uneven. At this time, the air flow velocity in the negative pressure chamber 11 is large, and the flow rate at the air inlet 13 is also large.

[0112] When the bluff body 20 is provided and the resistance coefficient is large, the negative pressure in the negative pressure chamber 11 is very uniform, equal to the negative pressure at the air inlet 13, and the negative pressure at the hole cavity covered by the pole piece 200 is also equal to the pressure at the air inlet 13. At this time, the air flow velocity in the negative pressure chamber 11 is very small, and the flow rate at the air inlet 13 is also very small. When the resistance coefficient is small and the resistance coefficient is medium, the non-uniform negative pressure phenomenon in the negative pressure chamber 11 is also improved compared to when no bluff body 20 is provided, and the air flow velocity is also reduced.

[0113] Therefore, according to the negative pressure conveying device 100 of the embodiment of the utility model, the baffle body 20 is set to reduce the amount of air entering the negative pressure chamber from the adsorption holes 31 not covered by the material on the conveyor belt 30, so that the air flow rate inside the negative pressure chamber 11 is relatively small, which can effectively improve the uniformity of the negative pressure inside the negative pressure chamber 11, and balance the adsorption force of multiple adsorption holes 31, thereby effectively improving the reliability of the negative pressure conveying device 100.

[0114] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A negative pressure conveying device, characterized in that: include: A base body, wherein a negative pressure cavity is provided in the base body, and an air inlet communicating with the negative pressure cavity is provided on one side of the base body; A conveyor belt, wherein the conveyor belt has a first surface and a second surface arranged opposite to each other in the thickness direction, the first surface faces the air inlet, the second surface is used to convey materials, the conveyor belt is provided with a plurality of adsorption holes, the first orifices of the adsorption holes are connected to the air inlet, and the second orifices of the adsorption holes are provided on the second surface; A bluff body is arranged between the air inlet and the adsorption hole to reduce the amount of air entering the negative pressure chamber from the adsorption hole.

2. The negative pressure conveying device according to claim 1, characterized in that: The bluff body is in contact with the first surface and / or the surface of the substrate.

3. The negative pressure conveying device according to claim 1, characterized in that: The bluff body is a porous medium layer or a flexible air-permeable layer, and the bluff body blocks the air inlet.

4. The negative pressure conveying device according to claim 1, characterized in that: The bluff body blocks a portion of the first opening of the adsorption hole.

5. The negative pressure conveying device according to claim 1, characterized in that: Also includes: At least one supporting rib is disposed in the negative pressure chamber, and a supporting surface of the supporting rib is in contact with the bluff body.

6. The negative pressure conveying device according to claim 5, characterized in that: The support rib is provided with a plurality of vent holes, a first opening of the vent hole is provided on the support surface, and a second opening of the vent hole is communicated with the negative pressure chamber.

7. The negative pressure conveying device according to claim 1 or 5, characterized in that: Also includes: At least one supporting rib is disposed on the inner wall surface of the negative pressure cavity, the supporting rib divides the negative pressure cavity into a plurality of cavities, the supporting rib is provided with a plurality of first connecting holes penetrating along the thickness direction thereof, the first connecting holes connect the plurality of cavities.

8. The negative pressure conveying device according to claim 1, characterized in that: Also includes: A support plate, the support plate is located between the negative pressure chamber and the bluff body, the support plate is connected to the substrate, the support plate and the bluff body are in contact with each other on the surface in the thickness direction thereof, and, The support plate is provided with a plurality of second communication holes penetrating along the thickness direction thereof, and the second communication holes are communicated with the negative pressure chamber.

9. The negative pressure conveying device according to claim 1, characterized in that: The bluff body is configured to filter the gas entering the negative pressure chamber from the adsorption hole.

10. The negative pressure conveying device according to claim 1, characterized in that: The bluff body is detachably connected to the base body.

11. The negative pressure conveying device according to claim 1, characterized in that: A sealing portion is provided at an edge of the bluff body, and the sealing portion is suitable for sealing the edge of the bluff body and / or a gap between the bluff body and the substrate.

12. The negative pressure conveying device according to claim 1, characterized in that: The adsorption holes include a first adsorption hole and a second adsorption hole, and the conveyor belt is provided with a first functional section and a second functional section distributed along the width direction thereof, wherein: The first functional section is provided with a plurality of the first adsorption holes, and the first adsorption holes are suitable for adsorbing the first part of the material. The second functional section is provided with a plurality of the second adsorption holes, the second adsorption holes are suitable for adsorbing the second part of the material, and, The first adsorption holes and the second adsorption holes have different pore diameters, and / or the numbers of the first adsorption holes and the second adsorption holes per unit area are different.

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