Cold water roller device for belt making machine

Abstract

The cold water roller device comprises a bottom plate, a side supporting plate, a left side plate and a right side plate are sequentially arranged on the top face of the bottom plate from left to right, side penetrating openings are formed in the upper portions of the side walls of the left side plate and the right side plate, air cylinders are arranged on the top face of the left side plate and the top face of the right side plate, and the output ends of the air cylinders are arranged downwards and connected with end blocks. A top cavity roller is rotationally connected between the two end blocks, and a bottom cavity roller is rotationally connected to the position, located below the top cavity roller, between the left side plate and the right side plate. The cooling device for the high-temperature belt prolongs the time for the high-temperature belt to pass through the cooling device, enables heat exchange to be more sufficient, meanwhile, the top cavity roller and the bottom cavity roller roll on the surface of the high-temperature belt, promotes heat exchange, greatly improves the cooling efficiency of the cooling device for the high-temperature belt, and is exquisite and efficient in structural arrangement and suitable for being applied and popularized on a belt manufacturing machine production line.

Description

Technical Field

[0001] The present invention relates to the technical field of tape making machines, and particularly to a cold water roller device for a tape making machine. Background Art

[0002] A tape making machine is a production device for producing strip materials. The strip materials are also called tapes. When the inside is silk thread and the outside is coated with plastic, it is also called a plastic-coated silk tape, which has properties such as strength, anti-corrosion and waterproofing.

[0003] Currently, on the production line of a tape making machine, there are also a traction mechanism, an extrusion die, etc. Among them, the traction mechanism is responsible for pulling the tape to move on the production line, and the extrusion die is used to coat the outside of the silk thread with plastic. The tape after passing through the extrusion die is in a high-temperature state and needs to be cooled. The currently common cooling method is water cooling, directly spraying cold water for cooling.

[0004] However, directly spraying cold water on the high-temperature tape can achieve a cooling effect. However, due to the thermal expansion and contraction effect, and it is difficult for the cold water to be evenly sprayed on the tape, resulting in an uneven surface of the tape. Moreover, the cold water spraying will cause sputtering, polluting the environment and being not conducive to recycling. Since the cold water directly contacts the high-temperature tape, there are strict requirements for the purity of the cold water to avoid impurities carried by it adhering to the tape, further increasing the use cost. Therefore, a cold water roller device for a tape making machine is proposed to solve the above problems and significantly improve the cooling efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a cold water roller device for a tape making machine to solve the problems in the prior art that the use of cold water spraying to cool the high-temperature tape on the production line of the tape making machine causes an uneven surface of the tape, pollutes the environment, and increases the use cost due to strict requirements for the purity of the cold water.

[0006] To achieve the above object, the present invention provides the following technical solution: A cold water roller device for a tape making machine, including a bottom plate. On the top surface of the bottom plate, a side support plate, a left side plate, and a right side plate are sequentially arranged from left to right. Side through openings are provided in the upper parts of the side walls of the left side plate and the right side plate. Cylinders are arranged on the top surfaces of the left side plate and the right side plate. The output ends of the cylinders are arranged downward and connected with end blocks. A top cavity roller is rotatably connected between the two end blocks. A bottom cavity roller is rotatably connected between the left side plate and the right side plate below the top cavity roller. On the top surface of the side support plate, a motor, a first protective housing, and a second protective housing are sequentially arranged from left to right. A top rotating shaft and a bottom rotating shaft are respectively rotatably connected between the inner walls of the first protective housing from top to bottom. A top gear is sleeved on the top rotating shaft. A bottom gear is sleeved on the bottom rotating shaft. The bottom gear and the top gear are meshed. The left end of the bottom rotating shaft is connected with the output end of the motor. The right end of the bottom rotating shaft is connected with the left end of the bottom cavity roller through a universal coupling. The right end of the top rotating shaft is connected with the left end of the top cavity roller through another universal coupling;

[0007] A rotary joint is connected to the right ends of the top cavity roller and the bottom cavity roller for continuously injecting cold water into the bottom cavity roller and the top cavity roller;

[0008] Height adjustment components are arranged on both the left side plate and the right side plate for adjusting the height of the end blocks.

[0009] Preferably: The height adjustment component includes equal-height pads, sliders, threaded shafts, and handles. The bottom surface of the end block is set as an inclined surface. The equal-height pads and the sliders are slidably connected in an inverted concave shape on both sides of the inner bottom surface of the side through opening. The threaded shaft is threadedly connected with the left side plate or the right side plate. One end of the threaded shaft located in the side through opening is rotatably connected with the slider.

[0010] Preferably: One end of the threaded shaft located outside the left side plate or the right side plate is sleeved with a handle. The inclination direction of the inclined surface is from back to front and upward.

[0011] Preferably: The equal-height pads are used to position the height of the end blocks. The inclined surface on the end block abuts against the top surface of the slider.

[0012] Preferably: A control valve is arranged on the top surface of the cylinder for controlling the opening and closing of the cylinder.

[0013] Preferably: The second protective housing is sleeved outside the universal coupling for isolating the universal coupling. A third protective housing is arranged on the right side of the right side plate for isolating the rotary joint. A vertical slot opening is provided at the position of the rotary joint connected to the top cavity roller on the third protective housing. A through slot opening is provided at the position of the rotary joint connected to the bottom cavity roller on the third protective housing for connecting the rotary joint with an external device.

[0014] Preferably, both ends of the top cavity roller pass through the end blocks on both sides thereof, and both ends of the bottom cavity roller pass through the left side plate and the right side plate respectively.

[0015] Preferably, the second protective housing is arranged in an inverted U shape, and both the left and right sides of the second protective housing are through.

[0016] Preferably, the central axes of the top cavity roller and the bottom cavity roller are arranged in parallel.

[0017] Preferably, the control valve controls the opening and closing of the cylinder through wireless communication. There is one control valve, and the handle includes a round sleeve and a short rod arranged at the outer edge of the round sleeve.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. Through the setting and cooperation of the motor, bottom gear, top gear, universal coupling, bottom cavity roller, top cavity roller and rotary joint, etc., the present device utilizes the reverse rotation of the bottom cavity roller and the top cavity roller, and cooperates with the rotary joint to continuously supply cold water into the bottom cavity roller and the top cavity roller. This not only prolongs the time for the high-temperature belt to pass through the present device, making the heat exchange more sufficient. At the same time, the top cavity roller and the bottom cavity roller roll on the surface of the high-temperature belt, promoting the heat exchange, greatly improving the cooling efficiency of the present device for the high-temperature belt. The structure is exquisitely and efficiently set, and is suitable for popularization and application on the production line of the tape making machine.

[0020] 2. Through the setting and cooperation of the equal-height cushion blocks, sliders, threaded shafts, cylinders, end blocks and inclined surfaces, etc., the present device utilizes the sliding of the slider on the inner bottom surface of the side through opening to jack up the end block, and cooperates with the downward pressure of the cylinder on the end block, successfully realizing the convenient and wide-range adjustment of the height of the end block. And the setting of the equal-height cushion blocks enables the present device to more quickly position the height of the end block for high-temperature belts of specific thicknesses, successfully realizing the tight pressing of high-temperature belts of different thicknesses, and then completing more efficient heat exchange, making the surface of the high-temperature belt flat, and significantly improving the cooling effect of the present device on the high-temperature belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a front view of the whole of the present invention;

[0024] Figure 3 Schematic diagram of the internal structures of the first protective housing and the second protective housing in the present invention;

[0025] Figure 4 Schematic diagram of the structure of the height adjustment component in the present invention;

[0026] Figure 5 Schematic diagram of the connection between the bottom gear and the top gear in the present invention;

[0027] Figure 6 Top view of the whole of the present invention.

[0028] In the figure: 1, bottom plate; 11, side support plate; 12, left side plate; 13, right side plate; 14, side through hole; 2, motor; 3, first protective housing; 31, second protective housing; 32, third protective housing; 33, vertical slot; 4, cylinder; 41, control valve; 42, end block; 43, inclined surface; 5, rotary joint; 6, bottom cavity roller; 61, top cavity roller; 7, height adjustment component; 71, equal height spacer; 72, slider; 73, threaded shaft; 74, handle; 8, universal coupling; 9, bottom gear; 91, top gear; 92, top rotating shaft; 93, bottom rotating shaft. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that for the orientation descriptions, such as up, down, front, back, left, right, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0031] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0032] Refer to Figure 1-6As shown, the present invention provides a technical solution for a cold water roller device for a tape making machine:

[0033] Referring to Figure 1-3 As shown, a cold water roller device for a tape making machine includes a bottom plate 1. On the top surface of the bottom plate 1, a side support plate 11, a left side plate 12, and a right side plate 13 are sequentially arranged from left to right. Side through openings 14 are provided in the upper parts of the side walls of the left side plate 12 and the right side plate 13. Cylinders 4 are arranged on the top surfaces of the left side plate 12 and the right side plate 13. The output ends of the cylinders 4 are arranged downward and connected with end blocks 42. A top cavity roller 61 is rotatably connected between the two end blocks 42. A bottom cavity roller 6 is rotatably connected between the left side plate 12 and the right side plate 13 below the top cavity roller 61. On the top surface of the side support plate 11, a motor 2, a first protective housing 3, and a second protective housing 31 are sequentially arranged from left to right. A top rotating shaft 92 and a bottom rotating shaft 93 are respectively rotatably connected between the inner walls of the first protective housing 3 from top to bottom. A top gear 91 is sleeved on the top rotating shaft 92, and a bottom gear 9 is sleeved on the bottom rotating shaft 93. The bottom gear 9 and the top gear 91 are meshed. The left end of the bottom rotating shaft 93 is connected with the output end of the motor 2, and the right end of the bottom rotating shaft 93 is connected with the left end of the bottom cavity roller 6 through a universal coupling 8. The right end of the top rotating shaft 92 is connected with the left end of the top cavity roller 61 through another universal coupling 8.

[0034] Rotary joints 5 are connected to the right ends of the top cavity roller 61 and the bottom cavity roller 6 for continuously injecting cold water into the bottom cavity roller 6 and the top cavity roller 61. Among them, the rotary joint 5 is a prior art and will not be elaborated here. Height adjustment components 7 are arranged on both the left side plate 12 and the right side plate 13 for adjusting the height of the end block 42. It should be noted that the height of the end block 42 is adjustable, that is, the gap between the bottom cavity roller 6 and the top cavity roller 61 is adjustable, so that this device can adapt to tapes of different thicknesses. Among them, the tape is the tape that needs to be cooled after passing through the extrusion die on the production line of the tape making machine. The tape making machine and the extrusion die are both prior arts and will not be elaborated here.

[0035] It should be added that referring to Figure 3 and Figure 4 As shown, the shapes of the top cavity roller 61 and the bottom cavity roller 6 are a thick cylinder and thin cylinders at the centers of both ends thereof. Among them, an internal cavity is provided in the thick cylinder, and the thin cylinder close to the rotary joint 5 is tubular and communicated with the inside of the thick cylinder.

[0036] Referring to Figure 4As shown, in an alternative embodiment: the height adjustment component 7 includes equal-height pads 71, sliders 72, threaded shafts 73, and handles 74. The bottom surface of the end block 42 is provided as an inclined surface 43. The equal-height pads 71 and the sliders 72 are in an inverted concave shape and are slidably connected to both sides of the inner bottom surface of the side through-hole 14. The threaded shaft 73 is threadedly connected to the left side plate 12 or the right side plate 13. One end of the threaded shaft 73 located inside the side through-hole 14 is rotatably connected to the slider 72.

[0037] It should be noted that when the handle 74 is rotated, since the threaded shaft 73 is threadedly connected to the left side plate 12 or the right side plate 13, the threaded shaft 73 will pull the slider 72 to slide on the inner bottom surface of the side through-hole 14. Also, due to the setting of the inclined surface 43, the end block 42 is lifted or lowered, thereby realizing the adjustment of the height of the end block 42.

[0038] Refer to Figure 4 As shown, in an alternative embodiment: one end of the threaded shaft 73 located outside the left side plate 12 or the right side plate 13 is sleeved with the handle 74. The inclination direction of the inclined surface 43 is inclined from back to front and upward.

[0039] Among them, it should be added that the equal-height pads 71 are used to position the height of the end block 42. The inclined surface 43 on the end block 42 abuts against the top surface of the slider 72.

[0040] It should be noted that the height of the equal-height pads 71 is optional. A number of equal-height pads 71 with different heights are pre-set according to the gap size between the top cavity roller 61 and the bottom cavity roller 6. When adjusting and positioning the height of the end block 42, first slide the equal-height pads 71 into the inner bottom surface of the side through-hole 14 and be located on the side of the inclined surface 43 of the end block 42 far from the handle 74. Cooperate with the start of the air cylinder 4 to press down the end block 42, thereby completing the rapid positioning of the height of the end block 42. The operation is convenient and efficient. Then rotate the handle 74 to control the slider 72 to slide on the inner bottom surface of the side through-hole 14 until it abuts against the end block 42, so as to more firmly support the end block 42 and keep the gap between the top cavity roller 61 and the bottom cavity roller 6 constant. When the belt passes through this device, the upper and lower surfaces of the belt are respectively tightly pressed by the top cavity roller 61 and the bottom cavity roller 6, so as to better perform heat exchange and improve the cooling effect of this device.

[0041] Refer to Figure 1 As shown, in an alternative embodiment: a control valve 41 is provided on the top surface of the air cylinder 4 for controlling the opening and closing of the air cylinder 4. Among them, the control process of the control valve 41 is prior art and will not be elaborated here.

[0042] Refer to Figure 1As shown, in an alternative embodiment: The second protective housing 31 is sleeved outside the universal coupling 8 for isolating the universal coupling 8. A third protective housing 32 is provided on the right side of the right side plate 13 for isolating the rotary joint 5. The third protective housing 32 is provided with a vertical slot 33 at the rotary joint 5 connected to the top cavity roller 61, and the third protective housing 32 is provided with a through slot at the rotary joint 5 connected to the bottom cavity roller 6 for connecting the rotary joint 5 to an external device.

[0043] The second protective housing 31 is provided for protecting the universal coupling 8 and also protecting the staff operating this device. Correspondingly, the first protective housing 3 is used to protect the bottom gear 9 and the top gear 91, and the third protective housing 32 is used to protect the rotary joint 5.

[0044] Refer to Figure 3 As shown, it should be added that both ends of the top cavity roller 61 pass through the end blocks 42 on both sides thereof, both ends of the bottom cavity roller 6 pass through the left side plate 12 and the right side plate 13 respectively, the second protective housing 31 is arranged in an inverted U shape, and the left and right sides of the second protective housing 31 are through.

[0045] Refer to Figure 2 and Figure 3 As shown, in an alternative embodiment: The central axes of the top cavity roller 61 and the bottom cavity roller 6 are arranged in parallel.

[0046] It should be noted that the central axes of the top cavity roller 61 and the bottom cavity roller 6 are arranged in parallel. When the belt passes between the two, the belt can be tightly pressed by the top cavity roller 61 and the bottom cavity roller 6, so as to better perform heat exchange and improve the cooling efficiency of this device.

[0047] Refer to Figure 1 As shown, in an alternative embodiment: The control valve 41 controls the opening and closing of the cylinder 4 through wireless communication. There is one control valve 41, and the handle 74 includes a round sleeve and a short rod arranged at the outer edge of the round sleeve.

[0048] It should be noted that the control valve 41 controls the cylinder 4 through wireless communication, making the structural arrangement of this device more concise and convenient for operation. The setting of the handle 74 is convenient for controlling the rotation of the threaded shaft 73, and the operation is more convenient.

[0049] Now, the working principle of this device is elaborated through its working process: This device is used to cool high-temperature belts with different thicknesses after passing through an extrusion die.

[0050] First, the gap between the top cavity roller 61 and the bottom cavity roller 6 is adjusted to accommodate belts of different thicknesses, including two situations: the first situation is that the thickness of the high-temperature belt is slightly greater than the gap between the top cavity roller 61 and the bottom cavity roller 6 represented by the equal-height pad 71 pre-set in the device. At this time, the equal-height pad 71 is first slid into the inner bottom surface of the side hole 14 and is located on the side of the inclined surface 43 of the end block 42 away from the handle 74, and the cylinder 4 is activated by the control valve 41 to press the end block 42 downward to complete the adjustment of the height of the end block 42. The handle 74 is then turned to control the slider 72 to slide on the inner bottom surface of the side hole 14 until it contacts the end block 42, thereby reinforcing the support and positioning of the end block 42, so that the gap between the top cavity roller 61 and the bottom cavity roller 6 is constant, so that when the high-temperature belt with a slightly larger thickness passes between the bottom cavity roller 6 and the top cavity roller 61, its upper and lower surfaces are tightly pressed together. It should be noted that the high-temperature belt can be slightly compressed due to the thermal expansion and contraction effect, so it can pass through the gap between the bottom cavity roller 6 and the top cavity roller 61;

[0051] The second situation is that the thickness of the high-temperature belt is not suitable for the equal-height pad 71. At this time, directly turn the handle 74 to control the slider 72 to slide on the inner bottom surface of the side hole 14, and then start the cylinder 4 to press down the end block 42, thereby controlling the gap size between the bottom cavity roller 6 and the top cavity roller 61 until the bottom cavity roller 6 and the top cavity roller 61 can tightly press the high-temperature belt passing through this device.

[0052] After the gap between the top cavity roller 61 and the bottom cavity roller 6 is adjusted, the motor 2 is started. The rotation of the motor 2 drives the bottom shaft 93 to rotate, thereby driving the bottom gear 9, the universal coupling 8 and the bottom cavity roller 6 to start rotating. After the meshing transmission of the bottom gear 9 and the top gear 91, the top shaft 92 and the universal coupling 8 connected thereto and the top cavity roller 61 start rotating. In particular, due to the setting of the universal coupling 8, when the height of the end block 42 is adjusted, the top gear 91 can still keep meshing with the bottom gear 9, so that the device is in a normal state. It is in normal operation, and due to the setting of the rotary joint 5, cold water is continuously supplied to the top cavity roller 61 and the bottom cavity roller 6 through the rotary joint 5. The rotation of the top cavity roller 61 and the bottom cavity roller 6 can not only make the high-temperature belt have a tendency to move away from its traction direction, thereby extending the time that the high-temperature belt passes through the device, thereby cooling it more efficiently. At the same time, the surface of the top cavity roller 61 and the bottom cavity roller 6 can roll over the high-temperature belt, further promoting heat exchange, thereby further improving the cooling efficiency of the device for the high-temperature belt.

[0053] Through the arrangement and cooperation of the motor 2, bottom gear 9, top gear 91, universal coupling 8, bottom cavity roller 6, top cavity roller 61, rotary joint 5, etc., the present device utilizes the reverse rotation of the bottom cavity roller 6 and the top cavity roller 61, and cooperates with the rotary joint 5 to continuously supply cold water into the bottom cavity roller 6 and the top cavity roller 61. This not only prolongs the time for the high-temperature belt to pass through the present device, making the heat exchange more sufficient, but also, the top cavity roller 61 and the bottom cavity roller 6 roll on the surface of the high-temperature belt, promoting the heat exchange, greatly improving the cooling efficiency of the present device for the high-temperature belt. The structural arrangement is delicate and efficient, and is suitable for popularization and application on the production line of the tape-making machine.

[0054] Through the arrangement and cooperation of the equal-height cushion block 71, slider 72, threaded shaft 73, cylinder 4, end block 42, inclined surface 43, etc., the present device utilizes the sliding of the slider 72 on the inner bottom surface of the side through-hole 14 to jack up the end block 42, and cooperates with the downward pressure of the cylinder 4 on the end block 42, successfully realizing the convenient and wide-range adjustment of the height of the end block 42. The setting of the equal-height cushion block 71 enables the present device to more quickly position the height of the end block 42 for high-temperature belts of a specific thickness, successfully realizing the pressing of high-temperature belts of different thicknesses, and then completing more efficient heat exchange, making the surface of the high-temperature belt flat, and significantly improving the cooling effect of the present device on the high-temperature belt.

[0055] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cold water roller device for a belt making machine, comprising a bottom plate (1), characterized in that: On the top surface of the bottom plate (1), there are side support plates (11), a left side plate (12) and a right side plate (13). On the top surfaces of the left side plate (12) and the right side plate (13), there are cylinders (4). The cylinders (4) are connected with end blocks (42). Between the two end blocks (42), a top cavity roller (61) is rotatably connected. Between the left side plate (12) and the right side plate (13), a bottom cavity roller (6) is rotatably connected. On the top surface of the side support plate (11), there are a motor (2), a first protective housing (3) and a second protective housing (31). Between the inner walls of the first protective housing (3), a top rotating shaft (92) and a bottom rotating shaft (93) are rotatably connected. A top gear (91) is sleeved on the top rotating shaft (92). A bottom gear (9) is sleeved on the bottom rotating shaft (93). The bottom rotating shaft (93) is connected with the motor (2) and is connected with the bottom cavity roller (6) through a universal coupling (8). The top rotating shaft (92) is connected with the top cavity roller (61) through another universal coupling (8).

2. The cold water roller device for a tape making machine according to claim 1, characterized in that: On the upper parts of the side walls of the left side plate (12) and the right side plate (13), side through openings (14) are respectively formed. The bottom gear (9) and the top gear (91) are meshed. The right ends of the top cavity roller (61) and the bottom cavity roller (6) are connected with a rotary joint (5) for continuously injecting cold water into the bottom cavity roller (6) and the top cavity roller (61). On the left side plate (12) and the right side plate (13), height adjusting components (7) are respectively provided for adjusting the height of the end block (42); The height adjusting component (7) includes equal height pads (71), sliders (72), threaded shafts (73) and handles (74). The bottom surface of the end block (42) is set as an inclined surface (43). The equal height pads (71) and the sliders (72) are in an inverted concave shape and are slidably connected to both sides of the inner bottom surface of the side through opening (14). The threaded shaft (73) is threadedly connected with the left side plate (12) or the right side plate (13). One end of the threaded shaft (73) located inside the side through opening (14) is rotatably connected with the slider (72).

3. The cold water roller device for a tape making machine according to claim 2, wherein: One end of the threaded shaft (73) located outside the left side plate (12) or the right side plate (13) is sleeved with the handle (74). The inclination direction of the inclined surface (43) is from back to front and upwardly inclined.

4. The cold water roller device for a tape making machine according to claim 3, characterized in that: The equal height pads (71) are used for positioning the height of the end block (42). The inclined surface (43) on the end block (42) abuts against the top surface of the slider (72).

5. A cold water roll device for a tape making machine according to claim 2 or 4, characterized in that: On the top surface of the cylinder (4), there is a control valve (41) for controlling the opening and closing of the cylinder (4).

6. The cold water roller device for a tape making machine according to claim 5, wherein: The second protective housing (31) is sleeved outside the universal coupling (8) for isolating the universal coupling (8). On the right side of the right side plate (13), there is a third protective housing (32) for isolating the rotary joint (5). At the rotary joint (5) connected with the top cavity roller (61), the third protective housing (32) is provided with a vertical slot opening (33). At the rotary joint (5) connected with the bottom cavity roller (6), the third protective housing (32) is provided with a through slot opening for connecting the rotary joint (5) with an external device.

7. The cold water roller device for a tape making machine according to claim 6, characterized in that: Both ends of the top cavity roller (61) pass through the end blocks (42) on both sides thereof, and both ends of the bottom cavity roller (6) pass through the left side plate (12) and the right side plate (13) respectively.

8. A cold water roller device for a belt making machine according to claim 7, characterized in that: The second protective housing (31) is provided in an inverted U shape, and the left and right sides of the second protective housing (31) are through.

9. The cold water roller device for a tape making machine according to claim 8, characterized in that: The central axes of the top cavity roller (61) and the bottom cavity roller (6) are arranged in parallel.

10. A cold water roller device for a belt making machine according to claim 9, characterized in that: The control valve (41) controls the opening and closing of the cylinder (4) through wireless communication. There is one control valve (41). The handle (74) includes a round sleeve and a short rod arranged at the outer edge of the round sleeve.

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