Extraction device with extraction roller adopting rigid bearing

Abstract

The utility model belongs to the technical field of film equipment, namely a multifunctional film stretching production line, and discloses an extraction device with a rigid bearing as an extraction roller. Shaft heads at two ends of the upper-layer roller group respectively extend out of the extraction tank; the shaft head is connected in a bearing box, the bearing box is embedded in a group of roller wallboards, and the whole roller wallboards are supported on a roller bracket; the bearing box is connected with the extraction tank through a corrugated pipe; a bearing in the bearing box and shaft heads at the two ends of the upper-layer roller set are sealed through a pair of lip-shaped sealing rings, and a cavity area between the lip-shaped sealing rings is a vacuum exhaust channel. The bearing is isolated from corrosive extraction liquid gas in an extraction tank, a ceramic bearing is replaced by a steel bearing, and a conventional bearing can be adopted for lubrication, so that the durability of the bearing is greatly improved, the cost of frequently replacing the bearing and the construction cost are reduced, and the production requirement of a large-scale film production line is met.

Description

Technical Field

[0001] The utility model relates to the technical field of film equipment - a multi-functional thin film stretching production line, in particular to an extraction device with a rigid bearing for an extraction roller. Background Art

[0002] As a device for white oil extraction in thin film industrial equipment, the extraction device plays a crucial role in ensuring the porosity parameters of the product film. As an important part of the extraction device, the extraction roller is in an environment of dichloromethane corrosive liquid and gas for a long time. The corrosion resistance and wear resistance of its bearing directly affect the stability and durability of the thin film production line. The current development trend of thin film production lines is that the production line speed is getting faster, the output is getting larger, the width of the film product is continuously increasing, the self-weight of the extraction roller is getting larger, and the requirement for the durability of the bearing of the extraction roller is getting higher. The original upper roller of the extraction tank used a ceramic bearing to achieve corrosion resistance in the dichloromethane environment. The bearing is above the extraction liquid level without lubricant, and its wear resistance can no longer meet the requirements of large-scale production lines, so a new structural type needs to be developed. Summary of the Utility Model

[0003] Based on the problems existing in the prior art, it is necessary to develop a new structural type of extraction device to meet the requirements of high speed and large scale of the film production line.

[0004] The technical solution of the utility model is as follows: An extraction device with a rigid bearing for an extraction roller, comprising an extraction tank 1, an upper roller group 2, upper extraction roller wallboards 3, upper extraction roller brackets 4, bearing boxes 5, bearings 6, bellows 7, a vacuum exhaust channel 8, a negative pressure vacuum pipeline, a vacuum pump, and a pressure gauge;

[0005] The two ends of the shaft heads of the upper roller group 2 extend out of the extraction tank 1 respectively; the shaft heads are connected inside the bearing boxes 5, and the bearing boxes 5 are embedded in a group of roller wallboards 3, and the entire roller wallboard 3 is supported on the roller bracket 4; a bellows 7 is used to connect between the bearing box 5 and the extraction tank 1 to prevent the overflow of dichloromethane toxic gas; the bearings 6 inside the bearing box 5 and the shaft heads of the upper roller group 2 near the extraction tank 1 side are sealed with a pair of lip seals, and a vacuum exhaust channel 8 is made in the cavity area between the lip seals; the vacuum exhaust channel 8 is externally connected to the negative pressure vacuum pipeline, and all negative pressure vacuum pipelines use one vacuum pump to achieve vacuum negative pressure, and a pressure gauge is arranged on the vacuum pump to detect the pressure state.

[0006] The characteristics of the utility model are: The upper roller group wallboard is supported by an outer bracket of the extraction tank, the shaft heads of the upper roller group extend out of the extraction tank, the roller bearings are placed outside the extraction tank, and the bearings are isolated from the extraction tank through a pair of lip seals and a vacuum negative pressure device. The bearings are not affected by the corrosive gas of the extraction liquid, and conventional lubrication can be used, and the load-bearing capacity and wear resistance are greatly improved compared with ceramic bearings.

[0007] Advantages of the present utility model: Through structural adjustment, the bearing is isolated from the corrosive extractant (dichloromethane) gas in the extraction tank. The ceramic bearing is replaced by a steel bearing and conventional bearing lubrication can be used, greatly improving the durability of the bearing, reducing the cost of frequent bearing replacement and construction cost, and meeting the production requirements of large-scale film production lines. Brief Description of the Drawings

[0008] Figure 1 is the overall structural schematic diagram of the extraction device of the present utility model;

[0009] Figure 2 is the structural schematic diagram of the upper roller group device of the present utility model;

[0010] Figure 3 is the structural schematic diagram of the bearing vacuum negative pressure air duct of the present utility model.

[0011] In the figure: 1 - extraction tank; 2 - upper roller group; 3 - upper extraction roller wall panel; 4 - upper extraction roller bracket; 5 - bearing box; 6 - bearing; 7 - bellows; 8 - vacuum exhaust channel. Detailed Description of the Preferred Embodiment

[0012] An extraction device with a rigid bearing for an extraction roller, comprising an extraction tank 1, an upper roller group 2, an upper extraction roller wall panel 3, an upper extraction roller bracket 4, a bearing box 5, a bearing 6, a bellows 7, a vacuum exhaust channel 8, a negative pressure vacuum pipeline, a vacuum pump, and a pressure gauge;

[0013] Both ends of the shaft head of the upper roller group 2 extend out of the extraction tank 1 respectively; the shaft head is connected inside the bearing box 5, the bearing box 5 is embedded in a group of roller wall panels 3, and the entire roller wall panel 3 is supported on the roller bracket 4; a bellows 7 is used to connect the bearing box 5 and the extraction tank 1 to prevent the toxic gas of dichloromethane from overflowing; the bearing 6 inside the bearing box 5 and the shaft head of both ends of the upper roller group 2 close to the extraction tank 1 side are sealed with a pair of lip seals, and a vacuum exhaust channel 8 is made in the cavity area between the lip seals; the vacuum exhaust channel 8 is externally connected to a negative pressure vacuum pipeline, and all negative pressure vacuum pipelines use one vacuum pump to achieve vacuum negative pressure, and a pressure gauge is arranged on the vacuum pump to detect the pressure state.

[0014] The bearing 6 is a steel bearing.

[0015] Through the device of the present utility model, the bearing damage rate is reduced by 60 - 80%, and the maintenance labor cost is reduced by 50 - 80%.

Claims

1. An extraction device with a rigid bearing for an extraction roller, characterized in that, The extraction device with a rigid bearing for the extraction roller includes an extraction tank (1), an upper roller group (2), an upper extraction roller wallboard (3), an upper extraction roller bracket (4), a bearing box (5), a bearing (6), a corrugated pipe (7), a vacuum exhaust channel (8), a negative pressure vacuum pipeline, a vacuum pump, and a pressure gauge; Both ends of the shaft heads of the upper roller group (2) extend out of the extraction tank (1); the shaft heads are connected inside the bearing box (5), and the bearing box (5) is installed in a group of roller wallboards (3), and the entire roller wallboard (3) is supported on the roller bracket (4); the bearing box (5) is connected to the extraction tank (1) by a corrugated pipe (7) to prevent the leakage of toxic dichloromethane gas; the bearings (6) in the bearing box (5) and the shaft heads at both ends of the upper roller group (2) near the extraction tank (1) are sealed with a pair of lip seals, and a vacuum exhaust channel (8) is made in the cavity area between the lip seals; the vacuum exhaust channel (8) is externally connected to a negative pressure vacuum pipeline, and all negative pressure vacuum pipelines use one vacuum pump to achieve vacuum negative pressure, and a pressure gauge is set on the vacuum pump to detect the pressure state.

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