Printing roller cooling device

Abstract

The utility model relates to the technical field of printing roller cooling, in particular to a printing roller cooling device which comprises a printing roller installation frame, transmission rollers are rotationally connected to the two sides of the top of the inner wall of the printing roller installation frame, protective belts are connected to the outer sides of the transmission rollers in a sleeved mode, and a water cooling machine is fixedly connected to the interior of the printing roller installation frame. A plurality of water cooling pipes are fixedly connected to the bottom of the water cooling machine, and a printing roller is rotationally connected into the printing roller mounting frame. The printing device has the advantages that the motor and the protective belt driven by the transmission roller are arranged above the printing roller, so that the protective belt is arranged between the water cooling pipe and the printing roller, the protective belt can rotate along with the printing roller in the rotating process of the printing roller, the contact surfaces of the protective belt and the printing roller are relatively static, and the influence of friction between the protective belt and the printing roller on the surface of the printing roller is avoided; no air gap exists between the water cooling pipe and the printing roller, so that the heat conduction efficiency is improved, cooling is accelerated, the printing roller cannot be abraded, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of printing roller cooling, in particular to a printing roller cooling device. Background Art

[0002] The printing press roller is the core component of the printing machinery. Its surface finish and geometric accuracy will have a significant impact on the quality of the printed product, especially when printing exquisite printed products. The slightest error will reduce the overall effect of the printed product and make both sides of the double-printed product appear blurry or distorted. The temperature of the printing roller will rise during the printing process. The higher temperature will affect the printing effect and damage the printing roller. Therefore, the printing roller needs to be cooled.

[0003] A printing roller cooling device is disclosed in Chinese patent CN202222712547.7. The printing roller cooling device, under the action of a cooling fan, a cold air pipe, an air outlet nozzle, a bearing, a drive pipe, a water-cooled circulation pipe, and a circulator, utilizes the cold air flow generated by the cooling fan, and then through the action of the cold air pipe and the air outlet nozzle, can effectively cool down the heat generated between the outer surfaces of the printing roller body. However, the printing roller cooling device cools the printing roller in a non-direct contact manner. The internal space of the printing device is limited, and it is inconvenient to remove hot air, which affects the heat dissipation efficiency. In addition, the direct contact cooling method is easy to contact with the rotating printing roller and affect the surface of the printing roller. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the prior art and provide a printing roller cooling device, which effectively solves the deficiencies of the prior art.

[0005] The purpose of the utility model is achieved through the following technical solutions: a printing roller cooling device, comprising a printing roller mounting frame, both sides of the top of the inner wall of the printing roller mounting frame are rotatably connected with transmission rollers, the outer side of the transmission roller is sleeved with a protective belt, the interior of the printing roller mounting frame is fixedly connected with a water cooler, the bottom of the water cooler is fixedly connected with a plurality of water cooling pipes, and the interior of the printing roller mounting frame is rotatably connected with a printing roller.

[0006] Optionally, the bottom of the protective belt is in contact with the bottom of the printing roller, a motor is fixedly connected to one side of the printing roller mounting frame, the output end of the motor is fixedly connected to the rotating shaft of a drive roller on one side, and the moving speed of the printing roller surface is equal to the moving speed of the bottom surface of the protective belt.

[0007] The above technical solution is adopted: by arranging a protective belt driven by a motor and a transmission roller above the printing roller, so that it is placed between the water-cooling pipe and the printing roller, the protective belt can rotate with the printing roller during the rotation of the printing roller, so that the contact surface between the two is relatively static, avoiding the friction between the two to affect the surface of the printing roller, and making there no air gap between the water-cooling pipe and the printing roller, thereby improving the heat conduction efficiency and accelerating the cooling, and will not cause wear to the printing roller.

[0008] Optionally, the width of the protection belt is matched with the length of the printing roller, the material of the protection belt is polyimide, and a plurality of circular holes are formed on the protection belt.

[0009] The above technical solution is adopted: by setting the material of the protective belt to polyimide, the protective belt of this material has high toughness and high corrosion resistance, and at the same time has excellent thermal conductivity. It can protect the surface of the printing roller while accelerating heat transfer, so that the printing roller can quickly dissipate heat.

[0010] Optionally, a portion of the water cooler is located outside the printing roller mounting frame, a water inlet pipe is fixedly connected to one side of the water cooler, a drain pipe is fixedly connected to the bottom of one side of the water cooler, and both ends of the water cooling pipe are respectively connected to the water inlet and outlet of the water cooler.

[0011] The above technical solution is adopted: by arranging a water cooler inside the protective belt, the water cooling pipe circulating low-temperature water can be attached to the lower surface of the protective belt, thereby cooling the printing roller by water.

[0012] Optionally, the bottom of the water cooling tube is in an arc shape, and the arc curvature of the water cooling tube matches the top curvature of the printing roller.

[0013] The above technical solution is adopted: by setting the bottom of the water-cooling pipe to be in an arc shape, it can fit with the top curvature of the printing roller, so that the two are in full contact, thereby improving the heat exchange efficiency.

[0014] Optionally, limit blocks are fixedly connected to both sides of the inner wall of the printing roller mounting frame, the top shape of the limit blocks is adapted to the top shape of the printing roller, the limit blocks are located at both ends of the printing roller, the top of the limit blocks is fitted with the bottom of the protective belt, and the friction coefficient between the limit blocks and the protective belt is less than 0.5.

[0015] The above technical solution is adopted: by setting limit blocks on both sides of the printing roller mounting frame, the middle part of the bottom surface of the protective belt forms an arc surface, which just matches the top curvature of the printing roller, thereby avoiding the situation where the protective belt exerts a large force on the printing roller and causes damage to the surface of the printing roller.

[0016] The utility model has the following advantages:

[0017] 1. The printing roller cooling device is provided with a protective belt driven by a motor and a transmission roller above the printing roller, so that the protective belt is placed between the water-cooling pipe and the printing roller. During the rotation of the printing roller, the protective belt can rotate with the rotation, so that the contact surface between the two is relatively static, so as to avoid the friction between the two affecting the surface of the printing roller, so that there is no air gap between the water-cooling pipe and the printing roller, thereby improving the heat conduction efficiency and accelerating the cooling, and will not cause wear to the printing roller. By setting the material of the protective belt to polyimide, the protective belt of this material has high toughness and high corrosion resistance, and has excellent thermal conductivity. It can protect the surface of the printing roller and accelerate heat transfer, so that the printing roller can dissipate heat quickly.

[0018] 2. The printing roller cooling device arranges a water cooler inside the protective belt so that a water cooling pipe circulating low-temperature water can fit with the lower surface of the protective belt, thereby cooling the printing roller by water. The bottom of the water cooling pipe is arranged in an arc shape so that it can fit with the top curvature of the printing roller, so that the two are in full contact, thereby improving the heat exchange efficiency.

[0019] 3. The printing roller cooling device sets limit blocks on both sides of the printing roller mounting frame so that the middle part of the bottom surface of the protection belt forms an arc surface, which just matches the top arc of the printing roller, thereby avoiding the situation where the protection belt exerts a large force on the printing roller and causes damage to the surface of the printing roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the side section structure of the utility model;

[0022] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 4 It is a schematic diagram of the front section structure of the utility model;

[0024] Figure 5 For this utility model Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 6 This is a schematic diagram of the structure of the utility model without side panels;

[0026] Figure 7 For this utility model Figure 6 Schematic diagram of the enlarged structure at point C in the middle.

[0027] In the figure: 1-printing roller mounting frame, 2-driving roller, 3-protective belt, 4-water cooler, 5-water cooling pipe, 6-printing roller, 7-motor, 8-round hole, 9-water inlet pipe, 10-drain pipe, 11-limiting block. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] like Figures 1 to 7 As shown, a printing roller cooling device comprises a printing roller mounting frame 1, driving rollers 2 are rotatably connected to both sides of the top of the inner wall of the printing roller mounting frame 1, a protective belt 3 is sleeved on the outer side of the driving roller 2, a water cooler 4 is fixedly connected to the inside of the printing roller mounting frame 1, a plurality of water cooling pipes 5 are fixedly connected to the bottom of the water cooler 4, and a printing roller 6 is rotatably connected to the inside of the printing roller mounting frame 1.

[0030] Embodiment 1: The bottom of the protective belt 3 fits with the bottom of the printing roller 6, and a motor 7 is fixedly connected to one side of the printing roller mounting frame 1. The output end of the motor 7 is fixedly connected to the rotating shaft of a drive roller 2 on one side. The moving speed of the surface of the printing roller 6 is equal to the moving speed of the bottom surface of the protective belt 3. The protective belt 3 driven by the motor 7 and the drive roller 2 is arranged above the printing roller 6, so that it is placed between the water-cooling pipe 5 and the printing roller 6. During the rotation of the printing roller 6, the protective belt 3 can follow the rotation, so that the contact surface between the two is relatively still, avoiding the friction between the two to affect the surface of the printing roller 6, so that there is no air gap between the water-cooling pipe 5 and the printing roller 6, thereby improving the thermal conductivity and accelerating the cooling, and will not cause wear to the printing roller 6.

[0031] Embodiment 2: The width of the protective belt 3 is adapted to the length of the printing roller 6. The material of the protective belt 3 is polyimide. A number of circular holes 8 are provided on the protective belt 3. By setting the material of the protective belt 3 to polyimide, the protective belt 3 made of this material has high toughness and high corrosion resistance, and at the same time has excellent thermal conductivity. It can protect the surface of the printing roller 6 while accelerating heat transfer, so that the printing roller 6 can quickly dissipate heat.

[0032] Embodiment 3: A portion of the water cooler 4 is located outside the printing roller mounting frame 1, a water inlet pipe 9 is fixedly connected to one side of the water cooler 4, a drain pipe 10 is fixedly connected to the bottom of one side of the water cooler 4, and both ends of the water cooling pipe 5 are respectively connected to the water inlet and the water outlet of the water cooler 4. By arranging the water cooler 4 inside the protective belt 3, the water cooling pipe 5 circulating low-temperature water can be attached to the lower surface of the protective belt 3, thereby cooling the printing roller 6 by water cooling.

[0033] Embodiment 4: The bottom of the water-cooling tube 5 is in an arc shape, and the arc curvature of the water-cooling tube 5 matches the top curvature of the printing roller 6. By setting the bottom of the water-cooling tube 5 in an arc shape, it can fit with the top curvature of the printing roller 6, so that the two are in full contact, thereby improving the heat exchange efficiency.

[0034] Embodiment 5: Limiting blocks 11 are fixedly connected to both sides of the inner wall of the printing roller mounting frame 1, and the top shape of the limiting blocks 11 is adapted to the top shape of the printing roller 6. The limiting blocks 11 are located at both ends of the printing roller 6, and the top of the limiting blocks 11 is in contact with the bottom of the protective belt 3. The friction coefficient between the limiting blocks 11 and the protective belt 3 is less than 0.5. By arranging the limiting blocks 11 on both sides of the printing roller mounting frame 1, an arc surface is formed in the middle part of the bottom surface of the protective belt 3, which is just adapted to the top curvature of the printing roller 6, thereby avoiding the situation where the protective belt 3 exerts a large force on the printing roller 6 and causes damage to the surface of the printing roller.

[0035] The working principle of the utility model is as follows:

[0036] S1. A protective belt 3 driven by a motor 7 and a driving roller 2 is arranged above the printing roller 6, so that the protective belt 3 is placed between the water-cooling tube 5 and the printing roller 6. When the printing roller 6 rotates, the protective belt 3 can rotate along with the printing roller 6, so that the contact surface between the two is relatively static, so as to avoid the friction between the two affecting the surface of the printing roller 6, so that there is no air gap between the water-cooling tube 5 and the printing roller 6, thereby improving the heat conduction efficiency and accelerating the cooling, and will not cause wear to the printing roller 6;

[0037] S2. The material of the protective belt 3 is set to polyimide. The protective belt 3 made of this material has high toughness and high corrosion resistance, and has excellent thermal conductivity. It can protect the surface of the printing roller 6 and accelerate heat transfer, so that the printing roller 6 can dissipate heat quickly.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. The printing roller cooling device, by arranging a protective belt 3 driven by a motor 7 and a driving roller 2 above the printing roller 6, so that the protective belt 3 is placed between the water-cooling pipe 5 and the printing roller 6. During the rotation of the printing roller 6, the protective belt 3 can follow the rotation, so that the contact surface between the two is relatively static, and the friction between the two is prevented from affecting the surface of the printing roller 6, so that there is no air gap between the water-cooling pipe 5 and the printing roller 6, thereby improving the heat conduction efficiency and accelerating the cooling, and will not cause wear to the printing roller 6. By setting the material of the protective belt 3 to polyimide, the protective belt 3 of this material has high toughness and high corrosion resistance, and has excellent thermal conductivity. It can protect the surface of the printing roller 6 while accelerating heat transfer, so that the printing roller 6 can quickly dissipate heat.

[0040] 2. The printing roller cooling device, by arranging a water cooler 4 inside the protective belt 3, allows the water cooling pipe 5 circulating low-temperature water to fit with the lower surface of the protective belt 3, thereby cooling the printing roller 6 by water. By setting the bottom of the water cooling pipe 5 to be in an arc shape, it can fit with the top curvature of the printing roller 6, so that the two are in full contact, thereby improving the heat exchange efficiency.

[0041] 3. The printing roller cooling device, by setting limit blocks 11 on both sides of the printing roller mounting frame 1, forms an arc surface in the middle of the bottom surface of the protection belt 3, which just matches the top curvature of the printing roller 6, thereby avoiding the situation where the protection belt 3 exerts a large force on the printing roller 6 and causes damage to the surface of the printing roller.

Claims

1. A printing roller cooling device, characterized in that: The invention comprises a printing roller installation frame (1), wherein both sides of the top of the inner wall of the printing roller installation frame (1) are rotatably connected to transmission rollers (2), the outer side of the transmission roller (2) is sleeved with a protective belt (3), the interior of the printing roller installation frame (1) is fixedly connected to a water cooler (4), the bottom of the water cooler (4) is fixedly connected to a plurality of water cooling pipes (5), and the interior of the printing roller installation frame (1) is rotatably connected to a printing roller (6).

2. A printing roller cooling device according to claim 1, characterized in that: The bottom of the protective belt (3) fits with the bottom of the printing roller (6); a motor (7) is fixedly connected to one side of the printing roller mounting frame (1); the output end of the motor (7) is fixedly connected to the rotating shaft of a transmission roller (2) on one side; the moving speed of the surface of the printing roller (6) is equal to the moving speed of the bottom surface of the protective belt (3).

3. A printing roller cooling device according to claim 2, characterized in that: The width of the protective belt (3) is matched to the length of the printing roller (6); the material of the protective belt (3) is polyimide; and a plurality of circular holes (8) are provided on the protective belt (3).

4. A printing roller cooling device according to claim 3, characterized in that: A portion of the water cooler (4) is located outside the printing roller mounting frame (1); a water inlet pipe (9) is fixedly connected to one side of the water cooler (4); a drain pipe (10) is fixedly connected to the bottom of one side of the water cooler (4); and both ends of the water cooling pipe (5) are respectively connected to the water inlet and the water outlet of the water cooler (4).

5. A printing roller cooling device according to claim 4, characterized in that: The bottom of the water cooling tube (5) is in an arc shape, and the arc curvature of the water cooling tube (5) matches the top curvature of the printing roller (6).

6. A printing roller cooling device according to claim 5, characterized in that: Limit blocks (11) are fixedly connected to both sides of the inner wall of the printing roller installation frame (1), the top shape of the limit blocks (11) is adapted to the top shape of the printing roller (6), the limit blocks (11) are located at both ends of the printing roller (6), the top of the limit blocks (11) is in contact with the bottom of the protection belt (3), and the friction coefficient between the limit blocks (11) and the protection belt (3) is less than 0.5.

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