Liquid squeezing rubber roller

Abstract

A liquid squeezing rubber roller comprises an inner shaft, the outer side of the inner shaft is sleeved with roller skin, the outer side of the roller skin is coated with a rubber layer, an end cover is arranged between each of the two ends of the roller skin and the inner shaft, a first sealing ring is arranged between each end cover and the inner shaft, and the space between each first sealing ring and the inner shaft is filled with fluororesin oil. Two second sealing rings are arranged between the outer circumferential face of the end cover and the inner circumferential face of the roller shell, and fluororesin oil is filled between the two second sealing rings between the end cover and the roller shell. The end covers are additionally arranged at the two ends of the rubber roller body, multiple sealing measures of the first sealing ring and the second sealing ring are adopted, dichloromethane gas is effectively prevented from entering the rubber roller body, the fluororesin oil strengthens corrosion resistance to dichloromethane, and therefore the corrosion problem of internal parts of the liquid squeezing rubber roller is reduced, and the service life of the liquid squeezing rubber roller is prolonged. The production quality of the lithium battery diaphragm is improved, the qualified rate of products is improved, the service life of the liquid squeezing rubber roller is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a roller, in particular to a liquid squeezing rubber roller. Background Art

[0002] In the extraction process of wet-process lithium battery separator production, the extraction stage uses a squeeze rubber roller to squeeze the lithium battery separator to remove the solvent. In the prior art, the squeeze rubber roller is usually composed of an outer roller skin and an inner shaft, and there is a certain gap between the inner and outer layers. Since the squeeze rubber roller works in a high-concentration dichloromethane gas environment, the dichloromethane gas can easily enter the roller body through these gaps, corroding the inner shaft and roller wall of the roller body and causing rust. The rust will seep out from the gaps in the roller body, polluting the production space of the lithium battery separator and causing product quality accidents.

[0003] Methylene chloride is a highly corrosive organic solvent that can cause severe corrosion to metal materials. The inner shaft of the squeeze roller is usually made of carbon steel and chrome-plated to enhance surface hardness and wear resistance. However, under the long-term corrosion of high-concentration methylene chloride gas, the chrome plating layer will gradually be destroyed, exposing the carbon steel matrix. Carbon steel has poor corrosion resistance and will quickly rust. The roller wall of the squeeze roller is usually made of rubber. Although rubber has a certain degree of corrosion resistance, it will gradually age and become brittle and lose its original performance if exposed to methylene chloride gas for a long time.

[0004] The corrosion of the squeeze roller will cause the following hazards:

[0005] 1. Reduce the service life of the squeezing rubber roller: Corrosion will make the inner shaft and roller wall of the squeezing rubber roller fragile, reducing its load-bearing capacity and service life.

[0006] 2. Pollution of lithium battery diaphragm production space: Rust will seep out from the gap of the extrusion rubber roller, pollute the production space of lithium battery diaphragm and affect product quality.

[0007] 3. Causing safety accidents: Severely corroded squeezing rubber rollers may rupture, causing safety accidents. Utility Model Content

[0008] The utility model aims to provide a liquid squeezing rubber roller, which can solve the technical problem in the prior art that dichloromethane easily enters the roller body and corrodes the roller body.

[0009] The utility model discloses a liquid squeezing rubber roller, comprising an inner shaft, a roller skin is sleeved on the outer side of the inner shaft, a rubber layer is coated on the outer side of the roller skin, an end cover is respectively arranged between the two ends of the roller skin and the inner shaft, a first sealing ring is arranged between the end cover and the inner shaft, fluororesin oil is filled between the first sealing ring and the inner shaft, two second sealing rings are arranged between the outer circumferential surface of the end cover and the inner circumferential surface of the roller skin, a limiting stop is arranged on the outer periphery of the end cover, two third sealing rings are arranged between the end surface of the limiting stop and the rubber layer, and fluororesin oil is filled between the two second sealing rings between the end cover and the roller skin.

[0010] Furthermore, the end cover is connected to the roller shell by bolts, and the bolts are evenly distributed along the circumferential direction.

[0011] Furthermore, a sealing ring installation groove is provided on the end cover, and the first sealing ring is installed in the sealing ring installation groove.

[0012] Compared with the prior art, the utility model has a positive and obvious effect. The utility model effectively prevents dichloromethane gas from entering the inside of the rubber roller body by adding end covers at both ends of the rubber roller body and adopting multiple sealing measures of the first sealing ring, the second sealing ring, and the third sealing ring. The fluororesin oil strengthens the corrosion resistance to dichloromethane, thereby reducing the corrosion problem of the internal parts of the squeezing rubber roller, improving the production quality of lithium battery diaphragms, improving the qualified rate of products, extending the service life of the squeezing rubber roller, and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a cross-sectional schematic diagram of a liquid squeezing rubber roller.

[0014] Figure 2 for Figure 1 A partial enlarged schematic diagram of . DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with an embodiment, but the present invention is not limited to the embodiment. Any similar structure and similar changes of the present invention should be included in the protection scope of the present invention. The use of directions such as up, down, front, back, left, and right in the present invention is only for the convenience of clear description and is not a limitation on the technical solution of the present invention.

[0016] like Figure 1 and Figure 2As shown, the utility model is a liquid squeezing rubber roller, comprising an inner shaft 1, a roller skin 2 is sleeved on the outer side of the inner shaft 1, a rubber layer 3 is coated on the outer side of the roller skin 2, an end cover 4 is respectively arranged between the two ends of the roller skin 2 and the inner shaft 1, a first sealing ring 5 is arranged between the end cover 4 and the inner shaft 1, fluororesin oil 6 is filled between the first sealing ring 5 and the inner shaft 1, two second sealing rings 8 are arranged between the outer circumferential surface of the end cover 4 and the inner circumferential surface of the roller skin 2, the outer periphery of the end cover 4 has a limit stop 7, two third sealing rings 9 are arranged between the end surface of the limit stop 7 and the rubber layer 3, and the two second sealing rings 8 between the end cover 4 and the roller skin 2 are filled with fluororesin oil 6.

[0017] Furthermore, the end cover 4 is connected to the roller skin 2 by bolts, and the bolts are evenly distributed along the circumferential direction.

[0018] Furthermore, a sealing ring installation groove is provided on the end cover 4, and the first sealing ring 5 is installed in the sealing ring installation groove.

[0019] Specifically, the inner shaft 1, roller skin 2, rubber layer 3, sealing ring, fluororesin oil 6, etc. in this embodiment all adopt well-known solutions in the prior art, which are well known to those skilled in the art and will not be described in detail here.

[0020] The working principle of this embodiment:

[0021] The utility model effectively prevents dichloromethane gas from entering the interior of the rubber roller body by adding end covers 4 at both ends of the rubber roller body and adopting multiple sealing measures such as a first sealing ring 5, a second sealing ring 8, and a third sealing ring 9. The fluororesin oil 6 enhances the corrosion resistance to dichloromethane, thereby reducing the corrosion problem of the internal parts of the squeezing rubber roller, improving the production quality of lithium battery diaphragms, improving the qualified rate of products, extending the service life of the squeezing rubber roller, and reducing the maintenance cost.

[0022] The roller skin 2 is made of rubber. The inner shaft 1 is made of carbon steel and chrome-plated to enhance the surface hardness and wear resistance. The end cover 4 is made of 304 or 316L stainless steel and has good corrosion resistance. The first sealing ring 5, the second sealing ring 8 and the third sealing ring 9 are made of dichloromethane-resistant FKM rubber sealing rings, which have good dichloromethane corrosion resistance and sealing performance. The size of the sealing ring should be designed according to the size of the rubber roller body to ensure the sealing effect. The sealing ring should adopt a double-lip structure to improve the sealing performance. The fluororesin oil 6 has good dichloromethane corrosion resistance and lubricity. The viscosity of the fluororesin oil 6 should be moderate for easy filling and flow.

Claims

1. A squeezing rubber roller, characterized in that: It includes an inner shaft, a roller skin is sleeved on the outer side of the inner shaft, a rubber layer is coated on the outer side of the roller skin, an end cover is respectively arranged between the two ends of the roller skin and the inner shaft, a first sealing ring is arranged between the end cover and the inner shaft, fluororesin oil is filled between the first sealing ring and the inner shaft, two second sealing rings are arranged between the outer circumferential surface of the end cover and the inner circumferential surface of the roller skin, a limit stop is provided on the outer periphery of the end cover, two third sealing rings are arranged between the end surface of the limit stop and the rubber layer, and fluororesin oil is filled between the two second sealing rings between the end cover and the roller skin.

2. A squeeze rubber roller according to claim 1, characterized in that: The end cover is connected to the roller shell through bolts, and the bolts are evenly distributed along the circumferential direction.

3. The squeezing rubber roller according to claim 1, characterized in that: The end cover is provided with a sealing ring installation groove, and the first sealing ring is installed in the sealing ring installation groove.

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