Cooling equipment for compression roller

Abstract

The utility model relates to the technical field of polyester film preparation, in particular to cooling equipment of a compression roller, which comprises a stretching roller, the compression roller, a cooling roller, a cooling water inlet pipe, a cooling water outlet pipe, an electric valve and a filter, the compression roller is arranged above the stretching roller along the axial direction of the stretching roller, and the cooling roller is arranged above the compression roller along the axial direction of the compression roller; the cooling roller is of a jacket structure, a cooling water inlet pipe is arranged at one end of the cooling roller, a cooling water outlet pipe is arranged at the other end of the cooling roller, and an electric valve and a filter are arranged on the cooling water inlet pipe. The cooling equipment of the compression roller aims to solve the problems that the compression roller is easy to deform and age when a BOPET (Biaxially Oriented Polyethylene Terephthalate) film is longitudinally stretched.

Description

Technical Field

[0001] This utility model relates to the field of polyester film preparation technology, and specifically to a cooling device for a pressure roller. Background Technology

[0002] During the longitudinal stretching of BOPET (Biaxially Oriented Polyethylene Terephthalate) film, a pressure roller is installed along the stretching roller direction to ensure full adhesion between the cast film and the stretching roller. Cylinders are installed at both ends of the pressure roller, applying pressure to both ends. The force on the pressure roller is uneven, especially in the middle where the force is least, making it prone to warping. The wider the pressure roller, the more pronounced the warping. Furthermore, to prevent scratches on the film surface, the pressure roller is generally made of rubber. However, because the stretching roller is a heated roller (70-110℃) and has an infrared heating device above it (500-600℃), it causes significant damage to the rubber pressure roller, leading to premature aging and a shorter service life.

[0003] Therefore, the inventors have provided a cooling device for the pressure roller. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] This utility model provides a cooling device for pressure rollers, which solves the technical problems of pressure rollers being easily deformed and aged by heat when BOPET film is stretched longitudinally.

[0006] (2) Technical solution

[0007] This utility model provides a cooling device for a pressure roller, including a stretching roller, a pressure roller, a cooling roller, a cooling water inlet pipe, a cooling water outlet pipe, an electric valve, and a filter. The pressure roller is arranged above the stretching roller along the axial direction of the stretching roller, and the cooling roller is arranged above the pressure roller along the axial direction of the pressure roller. The cooling roller has a jacket structure, with the cooling water inlet pipe at one end and the cooling water outlet pipe at the other end. The electric valve and the filter are installed on the cooling water inlet pipe.

[0008] Furthermore, the cooling equipment for the pressure roller also includes a thermometer and a cooling water outlet valve, both of which are located on the cooling water outlet pipe.

[0009] Furthermore, the thermometer is electrically connected to the electric valve and is used to adjust the valve opening degree of the electric valve according to the real-time temperature.

[0010] Furthermore, the cooling device for the pressure roller also includes a pre-filter valve and a post-filter valve, which are respectively installed on the cooling water inlet pipes at both ends of the filter.

[0011] Furthermore, the cooling equipment for the pressure roller also includes a filter bypass valve, which is connected in parallel with the filter in the cooling water inlet pipe.

[0012] Furthermore, the filter is a Y-type filter.

[0013] Furthermore, the cooling equipment for the pressure roller also includes a front valve and a rear valve for the electric valve, which are respectively installed on the cooling water inlet pipes at both ends of the electric valve.

[0014] Furthermore, the cooling equipment for the pressure roller also includes an electric bypass valve, and the cooling water inlet pipe is connected in parallel with the electric valve.

[0015] (3) Beneficial effects

[0016] In summary, this invention, by incorporating a cooling roller above the pressure roller and arranging it along the direction of the pressure roller, ensures uniform stress distribution across all parts of the pressure roller, balancing the pressure and effectively improving the problem of warping in the middle of the pressure roller. It also ensures uniform film stretching across the entire width, thus improving film quality. Cooling water can circulate within the cooling roller, effectively preventing overheating and aging of the pressure roller, extending its service life, and saving costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a cooling device for a pressure roller provided in an embodiment of this utility model.

[0019] In the picture:

[0020] 1-Stretch roller; 2-Pressure roller; 3-Cooling roller; 4-Thermometer; 5-Cooling water inlet pipe; 6-Cooling water outlet pipe; 7-Cooling water inlet valve; 8-Cooling water outlet valve; 9-Electric valve; 10-Filter; 11-Filter front valve; 12-Filter rear valve; 13-Filter bypass valve; 14-Electric valve front valve; 15-Electric valve rear valve; 16-Electric valve bypass valve. Detailed Implementation

[0021] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to exemplarily illustrate the principle of this utility model, but should not be used to limit the scope of this utility model. That is, this utility model is not limited to the described embodiments, and covers any modifications, substitutions and improvements to the parts, components and connection methods without departing from the spirit of this utility model.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Figure 1 This is a structural schematic diagram of a cooling device for a pressure roller provided by an embodiment of the present invention. (See attached diagram.) Figure 1 It may include a stretching roller 1, a pressure roller 2, a cooling roller 3, a cooling water inlet pipe 5, a cooling water outlet pipe 6, an electric valve 9, and a filter 10. The pressure roller 2 is arranged above the stretching roller 1 along the axial direction of the stretching roller 1, and the cooling roller 3 is arranged above the pressure roller 2 along the axial direction of the pressure roller 2. The cooling roller 3 has a jacket structure. One end of the cooling roller 3 is provided with a cooling water inlet pipe 5, and the other end is provided with a cooling water outlet pipe 6. The cooling water inlet pipe 5 is provided with an electric valve 9 and a filter 10.

[0026] In the above embodiment, by setting a cooling roller 3 above the pressure roller 2 and arranging the cooling roller 3 along the direction of the pressure roller 2, it is possible to ensure that all parts of the pressure roller 2 are subjected to uniform force, thereby balancing the pressure and effectively improving the problem of the middle arching of the pressure roller 2. At the same time, it can also make the film stretch uniformly across the entire width, thus improving the film quality. Cooling water can circulate inside the cooling roller 3, which can effectively prevent the pressure roller 2 from overheating and aging, extend the service life of the pressure roller 2, and save costs.

[0027] As an optional implementation method, such as Figure 1 As shown, the cooling device for the pressure roller also includes a thermometer 4 and a cooling water outlet valve 8, both of which are located on the cooling water outlet pipe 6. The thermometer 4 is used to obtain the outlet water temperature inside the cooling roller 3 in real time, thereby determining the surface temperature of the pressure roller 2.

[0028] As an optional implementation, the thermometer 4 is electrically connected to the electric valve 9 and is used to adjust the valve opening of the electric valve 9 according to the real-time temperature. Specifically, the electric valve 9 is electrically connected to the thermometer 4 and interlocked for control. It can automatically adjust the cooling water flow rate according to the cooling water temperature of the cooling roller 3. The operation is simple, and it can save cooling water consumption while ensuring the cooling effect.

[0029] As an optional implementation method, such as Figure 1 As shown, the cooling equipment for the pressure roller also includes a pre-filter valve 11 and a post-filter valve 12, which are respectively installed on the cooling water inlet pipes 5 at both ends of the filter 10.

[0030] As an optional implementation method, such as Figure 1 As shown, the cooling equipment for the pressure roller also includes a filter bypass valve 13, which is connected in parallel with the filter 10 in the cooling water inlet pipe 5. When the filter 10 becomes dirty, the filter bypass valve 13 can be opened, and the filter front valve 11 and filter rear valve 12 can be closed to clean the filter 10 online.

[0031] As an optional implementation, filter 10 is a Y-type filter. The Y-type filter effectively prevents impurities in the cooling water from entering the inner cavity of the cooling roller 3 and accumulating into scale, thereby improving cooling efficiency and extending the service life of the cooling roller 3.

[0032] As an optional implementation method, such as Figure 1 As shown, the cooling device for the pressure roller also includes a pre-electric valve 14 and a post-electric valve 15, which are respectively installed on the cooling water inlet pipes 5 at both ends of the electric valve 9. Specifically, the pre-electric valve 14 and the post-electric valve 15 are used to isolate the electric valve 9 when it malfunctions or needs cleaning, preventing liquid from flowing through the solenoid valve 9 and causing a large amount of leakage.

[0033] As an optional implementation method, such as Figure 1 As shown, the cooling equipment for the pressure roller also includes an electric bypass valve 16, which is connected in parallel with the electric valve 9 via a cooling water inlet pipe 5. When the electric valve 9 malfunctions and needs to be replaced or repaired, the electric bypass valve 16 can be opened as a backup valve to regulate the liquid flow, while the upstream valve 14 and downstream valve 15 are closed, allowing for online replacement or inspection of the electric valve 9.

[0034] It should be clarified that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. This utility model is not limited to the specific steps and structures described above and shown in the figures. Furthermore, for the sake of brevity, detailed descriptions of known methods and techniques are omitted here.

[0035] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art without departing from the scope of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A cooling device for a pressure roller, characterized in that, The assembly includes a stretching roller (1), a pressure roller (2), a cooling roller (3), a cooling water inlet pipe (5), a cooling water outlet pipe (6), an electric valve (9), and a filter (10). The pressure roller (2) is arranged above the stretching roller (1) along the axial direction of the stretching roller (1), and the cooling roller (3) is arranged above the pressure roller (2) along the axial direction of the pressure roller (2). The cooling roller (3) has a jacket structure. One end of the cooling roller (3) is provided with the cooling water inlet pipe (5), and the other end is provided with the cooling water outlet pipe (6). The electric valve (9) and the filter (10) are provided on the cooling water inlet pipe (5).

2. The cooling device for the pressure roller according to claim 1, characterized in that, It also includes a thermometer (4) and a cooling water outlet valve (8), both of which are located on the cooling water outlet pipe (6).

3. The cooling device for the pressure roller according to claim 2, characterized in that, The thermometer (4) is electrically connected to the electric valve (9) and is used to adjust the valve opening of the electric valve (9) according to the real-time temperature.

4. The cooling device for the pressure roller according to claim 1, characterized in that, It also includes a pre-filter valve (11) and a post-filter valve (12), which are respectively installed on the cooling water inlet pipes (5) at both ends of the filter (10).

5. The cooling device for the pressure roller according to claim 1, characterized in that, It also includes a filter bypass valve (13), which is connected in parallel with the filter (10) in the cooling water inlet pipe (5).

6. The cooling device for the pressure roller according to claim 1, characterized in that, The filter (10) is a Y-type filter.

7. The cooling device for the pressure roller according to claim 1, characterized in that, It also includes an electric valve front valve (14) and an electric valve rear valve (15), which are respectively installed on the cooling water inlet pipes (5) at both ends of the electric valve (9).

8. The cooling device for the pressure roller according to claim 1, characterized in that, It also includes an electric bypass valve (16), which is connected in parallel with the electric valve (9) to the cooling water inlet pipe (5).

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