Negative-pressure dust collection device for surface of pole piece

Abstract

The utility model discloses a negative pressure dust suction device for the surface of a pole piece, which comprises a dust removal cylinder body, a dust suction port is arranged on one side of the dust removal cylinder body close to the pole piece, and a rotatable brush is arranged in the dust removal cylinder body; the negative pressure cavity is arranged below the dust removal barrel and is communicated with the dust removal barrel; a main exhaust inlet is formed in one end of the negative pressure cavity; the negative pressure cavity is of a reducing structure, and the farther the negative pressure cavity is away from the main exhaust inlet, the smaller the section of the cavity is. The negative pressure cavity is of a reducing structure, the farther the negative pressure cavity is away from the air suction opening, the smaller the section of the cavity is, and the air speed of the whole cavity is uniform. The auxiliary air suction opening is additionally arranged on the lower portion of the negative pressure cavity, when the negative pressure cavity is too long, the air speed of the end, away from the main air suction opening, of the negative pressure cavity can be increased, the auxiliary air suction opening inclines towards the main air suction opening, and energy loss caused by mutual interference of suction force generated by the main air suction opening and the negative air suction opening is avoided as much as possible.

Description

Technical Field

[0001] The utility model relates to the field of battery core pole piece manufacturing equipment, in particular to a pole piece surface negative pressure dust suction device. Background Art

[0002] Existing negative pressure dust removal devices for pole pieces are mostly modified on the basis of the round tube structure. When there is enough space, round tubes of different diameters are connected to maintain the negative pressure wind speed. When the space is limited, a long and narrow slit is opened on a round tube of equal diameter to achieve a larger range of dust removal effect. However, in actual use, the wind speed in the dust collection cavity is unevenly distributed, and the wind speed far away from the air inlet is very weak, resulting in poor dust removal effect. Utility Model Content

[0003] The purpose of the utility model is to provide a negative pressure dust suction device on the surface of a pole piece to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A negative pressure dust suction device for a pole piece surface, comprising:

[0006] A dust removal cylinder, wherein a dust suction port is provided on one side of the dust removal cylinder close to the pole piece, and a rotatable brush is provided in the dust removal cylinder;

[0007] The negative pressure chamber is arranged below the dust removal cylinder, and the two are connected; a main air suction port is opened at one end of the negative pressure chamber; the negative pressure chamber is a variable diameter structure, and the farther it is from the main air suction port, the smaller the cross-section of the chamber is.

[0008] Furthermore, the negative pressure chamber also includes an auxiliary air inlet, which is opened below the negative pressure chamber and is inclined toward one side of the main air inlet.

[0009] Furthermore, the angle between the secondary air suction port and the negative pressure chamber is 45-60°.

[0010] Furthermore, it also includes a transition portion arranged between the dust removal cylinder and the negative pressure chamber, and the cross-section of the transition portion gradually narrows from top to bottom.

[0011] Furthermore, both ends of the negative pressure chamber have chamfers.

[0012] Furthermore, the brush is a roller brush.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The negative pressure chamber in the utility model is a variable diameter structure. The farther it is from the air suction port, the smaller the cross-section of the chamber is, which is conducive to uniform wind speed in the entire chamber. An auxiliary air suction port is added at the lower part of the negative pressure chamber. When the length of the negative pressure chamber is too long, the wind speed of the negative pressure chamber away from the main air suction port can be increased. The auxiliary air suction port is inclined toward the main air suction port to avoid energy loss caused by mutual interference between the suction forces generated by the main air suction port and the negative air suction port. The inclination of the bottom of the negative pressure chamber can also avoid the accumulation of dust, causing part of the dust to be sucked away from the air suction port with the suction force. The two ends of the negative pressure chamber are chamfered to avoid the formation of vortex areas in the corners of the negative pressure chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is the front view of the utility model;

[0017] Figure 3 It is a side view of the utility model;

[0018] Figure 4 This is a schematic diagram of the working state of the utility model;

[0019] In the figure: 1-dust removal cylinder, 11-dust suction port, 12-brush, 2-negative pressure chamber, 21-main air suction port, 22-auxiliary air suction port, 23-chamfer, 3-transition part, 4-pole piece. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0022] See also Figure 1-4 , a negative pressure dust suction device on the surface of an electrode piece, comprising a dust removal cylinder 1, a transition part 3 and a negative pressure chamber 2 connected in sequence from top to bottom, wherein:

[0023] A dust suction port 11 is provided on one side of the dust removal cylinder 1 close to the pole piece 4, and a rotatable brush 12 is provided in the dust removal cylinder 1; the negative pressure chamber 2 is provided below the dust removal cylinder 1; a main air suction port 21 is provided at one end of the negative pressure chamber 2; the negative pressure chamber 2 is a variable diameter structure, and the farther it is from the main air suction port 21, the smaller the cross section of the chamber. The main air suction port 21 is connected to the negative pressure fan to suck the negative pressure chamber 2, and the rolling brush 12 brushes the dust particles on the surface of the pole piece 4 off, and then is sucked into the negative pressure chamber 2; the transition portion 3 is provided between the dust removal cylinder 1 and the negative pressure chamber 2, and the cross section of the transition portion 3 gradually narrows from top to bottom. The transition portion 3 serves as a transition connection between the dust removal cylinder 1 and the negative pressure chamber 2, and the inverted trapezoidal cross section design facilitates the dust to fall to the bottom of the negative pressure chamber 2 under the action of negative pressure and gravity.

[0024] The bottom of the negative pressure chamber 2 is inclined to prevent excessive dust from being deposited in the negative pressure chamber 2, so that most of the dust is discharged from the dust suction port with the suction force.

[0025] Furthermore, the negative pressure chamber 2 also includes an auxiliary air suction port 22, which is opened below the negative pressure chamber 2. When the length of the dust removal cylinder 1 is too long (greater than 1200mm), the main air suction port 21 cannot maintain the wind speed level in the entire negative pressure chamber 2, especially at the end away from the main air suction port 21, the suction force is relatively weak. Therefore, an auxiliary air suction port 22 is added below the negative pressure chamber 2 to increase the wind speed at the other end of the negative pressure chamber 2. The horizontal angle of the auxiliary air suction port 22 is 60°, and it is inclined toward the main air suction port 21. The auxiliary air suction port 22 is arranged outside the center line of the negative pressure chamber 2, and the auxiliary air suction port 22 is also connected to a negative pressure fan with slightly smaller power.

[0026] In other embodiments, the number of the auxiliary air suction ports 22 depends on the length of the negative pressure chamber 2 and may be 1-3.

[0027] Furthermore, both ends of the negative pressure chamber 2 have chamfers 23 to prevent eddy flow areas from being formed at the corners in the negative pressure chamber 2 .

[0028] Furthermore, the brush 12 is a roller brush.

[0029] The utility model needs to be used in pairs when in use. One of the dust suction devices is placed on both sides of the pole piece 4, so that the two dust suction ports 11 face the front and back sides of the pole piece 4 respectively, and the two brushes 12 also rotate in symmetrical directions (one counterclockwise and the other clockwise). When working, the brush 12 contacts the surface of the pole piece 4, brushes off the dust particles on the surface of the pole piece 4, and under the action of the negative pressure fan, suction is generated in the negative pressure chamber 2, causing the dust adhering to the surface of the brush 12 to fall. Most of the dust is discharged from the suction port with the suction force, and a small part of the dust is collected at the bottom of the negative pressure chamber 2. The dust at the bottom of the negative pressure chamber 2 needs to be cleaned regularly.

[0030] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0031] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A negative pressure dust suction device for a pole piece surface, characterized in that: include: A dust removal cylinder (1), wherein a dust suction port (11) is provided on a side of the dust removal cylinder (1) close to the pole piece (4), and a rotatable brush (12) is provided in the dust removal cylinder (1); The negative pressure chamber (2) is arranged below the dust removal cylinder (1), and the two are connected; a main air suction port (21) is provided at one end of the negative pressure chamber (2); the negative pressure chamber (2) is a variable diameter structure, and the farther away from the main air suction port (21), the smaller the cross section of the chamber.

2. The negative pressure dust suction device for the electrode surface according to claim 1, characterized in that: The negative pressure chamber (2) further comprises an auxiliary air suction port (22), wherein the auxiliary air suction port (22) is disposed below the negative pressure chamber (2), and the auxiliary air suction port (22) is inclined toward one side of the main air suction port (21).

3. The negative pressure dust suction device for the pole piece surface according to claim 2, characterized in that: The angle between the auxiliary air suction port (22) and the negative pressure chamber (2) is 45-60 degrees.

4. The negative pressure dust suction device for the electrode surface according to claim 1, characterized in that: It also comprises a transition portion (3) arranged between the dust removal cylinder (1) and the negative pressure chamber (2), wherein the cross section of the transition portion (3) gradually narrows from top to bottom.

5. The negative pressure dust suction device for the electrode surface according to claim 1, characterized in that: Both ends of the negative pressure chamber (2) have chamfers (23).

6. The negative pressure dust suction device for the electrode surface according to claim 1, characterized in that: The brush (12) is a roller brush.

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