Soft roll calender with roll surface anti-scald mechanism

Abstract

The invention relates to the technical field of calenders, in particular to a soft roll calender with a roll surface anti-scald mechanism, which comprises a fixed seat, a hot roll and a soft roll, the fixed seat is U-shaped, the hot roll and the soft roll are respectively arranged on the upper side and the lower side in the fixed seat and are parallel and aligned, and the soft roll calender further comprises a movable seat arranged above the fixed seat. The movable seat is in sliding fit with the fixed seat in the vertical direction, the hot roller is rotationally connected with the fixed seat, and the soft roller is rotationally connected with the movable seat; the two air blowing parts are arranged and used for blowing air to the two ends of the soft roller, cold air is used for cooling the surface of the soft roller, and therefore the surface layer of the soft roller is prevented from being scalded and damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of calenders, and specifically to a soft calender with a roll surface anti-scalding mechanism. Background Art

[0002] Paper calenders are important equipment in the paper industry. Their main function is to improve the smoothness and brightness of the paper surface, making the paper density more compact and the thickness uniform.

[0003] Currently, calenders mainly include a machine base and two calender rolls. If both the upper and lower calender rolls are hard rolls, the contact area between the roll and the paper is small, resulting in uneven paper tightness and large deviation. Therefore, to overcome the above problems, one hard roll and one soft roll are selected for the existing calender rolls. Among them, the surface of the hot roll is a stainless steel roll surface, and hot oil is passed through it to heat the roll surface; while the outer surface of the soft roll is made of rubber or other flexible materials to increase the contact area with the paper web, thereby improving the calendering effect.

[0004] However, since the roll surface temperature of the hot roll is relatively high, and the surface of the soft roll is made of flexible materials, flexible materials generally do not have high temperature resistance properties. Especially at the two end edges of the soft roll, due to direct contact with the hot roll, the heat conduction efficiency is high and the temperature rises quickly. Over time, it is easy to cause the edge part of the soft roll to be scalded and the roll surface to be damaged. For this reason, we propose a soft calender with a roll surface anti-scalding mechanism to well solve the above drawbacks. Summary of the Invention

[0005] The purpose of the present invention is to provide a soft calender with a roll surface anti-scalding mechanism to solve the problems raised in the above background art.

[0006] The present invention is achieved through the following technical solutions:

[0007] A soft calender with a roll surface anti-scalding mechanism includes a fixed seat, a hot roll, and a soft roll. The fixed seat is in a U shape. The hot roll and the soft roll are respectively arranged on the upper and lower sides inside the fixed seat, parallel and aligned with each other. It further includes:

[0008] A movable seat, which is arranged above the fixed seat. The movable seat is slidably matched with the fixed seat vertically. The hot roll is rotatably connected to the fixed seat, and the soft roll is rotatably connected to the movable seat;

[0009] An air cooling mechanism, which includes two blowing parts. The two blowing parts are respectively arranged below the soft roll. Each blowing part includes a blowing belt and two rotating shaft rods. The blowing belt is sleeved outside the two rotating shaft rods, and the blowing belt is in an arc shape. The upper surface of the blowing belt is in contact with the roll surface of the soft roll;

[0010] The two blowing parts are also connected to an external air source, and the air supply belt is also provided with air holes for ventilation, and the air holes are used to discharge the cold air provided by the external air source.

[0011] Optionally, a fixing plate is provided on the inner side of the fixing seat and below the soft roller, and the two blowing parts are respectively provided on the left and right sides of the top surface of the fixing plate.

[0012] Optionally, the blowing part includes a blowing hood, which is a hollow structure with an open top surface, the air supply belt is arranged on the top inner side of the blowing hood, and the two rotating shafts are respectively rotatably connected to the two side walls of the blowing hood.

[0013] Optionally, a pipe hole is opened on one side wall of the bottom of the blowing hood, and a three-way air inlet pipe is provided between the two blowing hoods. The two ends of the three-way air inlet pipe are respectively installed in the pipe holes of the two blowing hoods, and the other end of the three-way air inlet pipe is connected to an external air source.

[0014] Optionally, the outer surface of the air supply belt is protruding with a plurality of ridges, the ridges are distributed along the length direction of the rotating shaft, and the plurality of ridges are evenly spaced apart, and there are a plurality of air holes between two adjacent ridges.

[0015] Optionally, a plurality of correction rollers are provided on the inner side of the air supply belt, the axial direction of the correction rollers is consistent with the axial direction of the rotating shaft, and the plurality of correction rollers are in contact with the inner lower surface of the air supply belt to maintain the shape of the air supply belt.

[0016] Optionally, an arc-shaped through-hole is provided on one side wall of the top of the blowing part, and the shape of the through-hole is consistent with the shape of the air supply belt. A blocking plate is also movably inserted into the through-hole, and the blocking plate is in contact with the inner upper surface of the air supply belt; a fixing ear is provided at one end of the outside of the blocking plate, and an adjusting bolt is threadedly connected to the fixing ear, and one end of the adjusting bolt is rotatably connected to the outer surface of the blowing part.

[0017] Optionally, a lifting cylinder is provided on the top surface of the movable seat, and a movable end of the lifting cylinder is connected to the fixed seat.

[0018] Optionally, a drive motor is provided on an outer side wall of the movable seat, the output shaft of the drive motor is coaxially connected to one end of the soft roller, the other end of the soft roller is rotatably connected to a side wall of the movable seat, and movable openings for the end of the soft roller to pass through are provided on the left and right side walls of the fixed seat.

[0019] Optionally, both ends of the fixed plate pass through the fixed seat and are fixedly connected to the inner side wall of the movable seat.

[0020] Compared with the prior art, the present invention provides a soft roller calender with a roller surface anti-scalding mechanism, which has the following beneficial effects:

[0021] 1. The present invention has two blowing parts, which are used to blow air to both ends of the soft roller, using cold air to cool the surface of the soft roller, thereby preventing the surface of the soft roller from being burned or damaged;

[0022] 2. The blowing part of the present invention is provided with an air supply belt, and the surface of the air supply belt has a plurality of air holes, which can blow cold air to the surface of the soft roller at a close distance, thereby fully removing the heat from the surface of the soft roller;

[0023] 3. The surface of the air supply belt in the present invention also has a plurality of ridges, which are used to abut against the soft roller, thereby absorbing heat through contact, further helping to improve the heat dissipation efficiency of the soft roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a front view of the structure of the present invention;

[0026] Figure 3 This is a structural schematic diagram of the blowing part of the present invention;

[0027] Figure 4 This is a cross-sectional view of the blowing portion structure of the present invention;

[0028] Figure 5 This is a cross-sectional view of the heat roller structure of the present invention;

[0029] Figure 6 for Figure 4 The corresponding figure at point A is enlarged.

[0030] In the figure: 100, fixed seat; 101, fixed plate; 200, hot roller; 201, first cavity; 202, second cavity; 203, penetration hole; 204, rotating seat; 300, soft roller; 400, movable seat; 401, lifting cylinder; 402, driving motor; 500, air cooling mechanism; 501, blowing part; 5011, air supply belt; 5012, rotating shaft; 5013, air hole; 5014, blowing hood; 5015, pipe hole; 5016, ridge; 5017, correction roller; 502, three-way air inlet pipe; 503, blocking plate; 504, fixing ear; 505, adjusting bolt. DETAILED DESCRIPTION

[0031] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figure 1 - Figure 6 , a soft calender with a roll surface anti-scalding mechanism, including a fixed seat 100, a hot roll 200 and a soft roll 300. The fixed seat 100 is in a U shape. The hot roll 200 and the soft roll 300 are respectively arranged on the upper and lower sides inside the fixed seat 100, and the two are parallel and aligned. In addition, a movable seat 400 is slidably arranged vertically above the fixed seat 100. The movable seat 400 is in a C shape, and the two side walls of the movable seat 400 are respectively slidably connected to the two side walls of the fixed seat 100.

[0033] Furthermore, the hot roll 200 is rotationally connected to the fixed seat 100, and the soft roll 300 is rotationally connected to the movable seat 400. And, a lifting cylinder 401 is arranged on the top surface of the movable seat 400. The movable end of the lifting cylinder 401 is connected to the fixed seat 100 for controlling the lifting of the movable seat 400. A driving motor 402 is arranged on an outer side wall of the movable seat 400. The output shaft of the driving motor 402 is coaxially connected to one end of the soft roll 300. The other end of the soft roll 300 is rotationally connected to a side wall of the movable seat 400. And movable openings for the ends of the soft roll 300 to pass through are respectively opened on the left and right side walls of the fixed seat 100. Therefore, by the lifting cylinder 401, it can be controlled whether the soft roll 300 contacts the hot roll 200.

[0034] It should be noted that a first cavity 201 is opened in the hot roll 200 around the central axis, and a second cavity 202 is opened in the side wall of the hot roll 200. A penetration hole 203 is opened between the first cavity 201 and the second cavity 202. At the same time, both ends of the hot roll 200 are rotationally connected to a rotating seat 204 through shaft seals, and both rotating seats 204 are fixedly connected to the side wall of the fixed seat 200. In addition, both ends of the hot roll 200 respectively have a liquid inlet and a liquid outlet. The liquid inlet is connected to the second cavity 202, and the liquid outlet is connected to the first cavity 201. The hot oil enters the second cavity 202 through the liquid inlet, then the hot oil enters the first cavity 201 through the penetration hole 203, and finally is discharged through the liquid outlet, so as to heat the hot roll 200.

[0035] This embodiment also includes an air cooling mechanism 500, which includes two blowing units 501, each located below the soft roller 300. The blowing units 501 include an air supply belt 5011 and two rotating shafts 5012. The air supply belt 5011 is mounted outside the two rotating shafts 5012 and is curved, with the upper surface of the air supply belt 5011 in contact with the roller surface of the soft roller 300. Furthermore, the two blowing units 501 are connected to an external air source. The air supply belts 5011 are provided with air holes 5013 for ventilation, which discharge cool air provided by the external air source. The external air source can be a blower, which is used to blow cool air into the blowing units 501, thereby cooling the edges of the soft roller 300.

[0036] Furthermore, a fixed plate 101 is provided inside the fixed base 100 and below the soft roller 300. Two blowing sections 501 are respectively provided on the left and right sides of the top surface of the fixed plate 101. The blowing section 501 includes a blowing hood 5014, which is a hollow structure with an open top surface. An air supply belt 5011 is provided inside the top of the blowing hood 5014. Two rotating shafts 5012 are rotatably connected to the two side walls of the blowing hood 5014. The blowing hood 5014 is fixedly connected to the fixed plate 101, and the two side edges of the air supply belt 5011 have only a slight gap with the inner wall of the blowing hood 5014. The top of the air supply belt 5011 also has a slight gap with the inner top wall of the blowing hood 5014, which ensures that most airflow can be discharged through the air holes 5013.

[0037] In addition, a tube hole 5015 is formed on one side wall of the bottom of the blow hood 5014. A three-way air inlet pipe 502 is provided between the two blow hoods 5014. The two ends of the three-way air inlet pipe 502 are respectively installed in the tube holes 5015 of the two blow hoods 5014, and the other end of the three-way air inlet pipe 502 is connected to an external air source. Therefore, the three-way air inlet pipe 502 is used to blow air from the external air source into the two blow hoods 5014, and finally discharge the air through the air hole 5013.

[0038] In some embodiments of the present application, the outer surface of the air supply belt 5011 is formed with a plurality of ridges 5016. The ridges 5016 are distributed along the length of the rotating shaft 5012 and are evenly spaced. A plurality of air holes 5013 are located between adjacent ridges 5016. Furthermore, a plurality of straightening rollers 5017 are provided on the inner side of the air supply belt 5011. The axial direction of the straightening rollers 5017 is aligned with the axial direction of the rotating shaft 5012. The straightening rollers 5017 are in contact with the inner lower surface of the air supply belt 5011 to maintain the shape of the air supply belt 5011. Since the ridges 5016 can contact the surface of the soft roller 300, there is only a small gap between the air holes 5013 and the surface of the soft roller 300, and the gas blown out from the air holes 5013 can fully act on the surface of the soft roller 300; at the same time, since the blowing hood 5014 contains a large amount of cold air, the temperature of the air supply belt 5011 itself is also relatively low, and the contact between the ridges 5016 and the soft roller 300 can also achieve a heat dissipation effect on the soft roller 300.

[0039] In addition, it is worth mentioning that both ends of the fixed plate 101 pass through the fixed seat 100 and are fixedly connected to the inner wall of the movable seat 400. Therefore, the lifting and lowering of the movable seat 400 will also synchronously drive the lifting and lowering of the fixed plate 101, so that the air supply belt 5011 can always maintain contact with the soft roller 300.

[0040] In another embodiment of the present application, a curved through-hole is formed on one side wall of the top of the blowing section 501. The shape of the through-hole matches that of the air supply belt 5011. A blocking plate 503 is movably inserted into the through-hole, and the blocking plate 503 is in contact with the inner upper surface of the air supply belt 5011. A fixing ear 504 is provided on one end of the blocking plate 503. An adjusting bolt 505 is threadedly connected to the fixing ear 504. One end of the adjusting bolt 505 is rotatably connected to the outer surface of the blowing section 501. Therefore, by rotating the adjusting bolt 505, the insertion depth of the blocking plate 503 into the blowing section 501 can be controlled, thereby controlling the opening and closing of the corresponding air holes 5013.

[0041] It should be noted that one side of the air supply belt 5011 is aligned with the end face of the soft roller 300. When the width of the paper entering between the hot roller 200 and the soft roller 300 is narrow, since the section where the edge of the soft roller 300 contacts the hot roller 200 is wide, the blocking plate 503 can be extended outward as much as possible to open more air holes 5013; conversely, when the paper is wider, the blocking plate 503 can be appropriately extended inward into the blowing hood 5014 to block a part of the air holes 5013 to improve the utilization rate of the cold air.

[0042] It should be noted that one side of the air supply belt 5011 is aligned with the end face of the soft roller 300. When the width of the paper entering between the hot roller 200 and the soft roller 300 is narrow, since the section where the edge of the soft roller 300 contacts the hot roller 200 is wide, the blocking plate 503 can be extended outward as much as possible to open more air holes 5013; conversely, when the paper is wider, the blocking plate 503 can be appropriately extended inward into the blowing hood 5014 to block a part of the air holes 5013 to improve the utilization rate of the cold air.

[0043] In summary, in actual use of this embodiment, due to the limited width of the paper web, the edge of the soft roller 300 will inevitably come into direct contact with the hot roller 200. To prevent the edge of the soft roller 300 from being burned by the high temperature, an air cooling mechanism 500 is designed to cool the edge of the soft roller 300. An external air source blows cool air into the air hood 5014, which then flows through the air holes 5013 toward the soft roller 300, thereby directly cooling the soft roller 300. Furthermore, because the air supply belt 5011 is in direct contact with the soft roller 300, it also removes heat from the surface of the soft roller 300, further improving the cooling efficiency of the soft roller 300 and preventing burns on the surface material of the soft roller 300.

[0044] At the same time, a calendering method combining a hot roller 200 and a soft roller 300 is adopted. The hot roller 200 improves the stability of the paper surface, making the paper surface more easily deformed by pressure. The soft roller 300 increases the contact area between the roller and the paper. The compression pressure acts on a larger area of ​​the paper surface, making the tightness uniform and ensuring the uniformity of the paper tightness.

[0045] In addition, since the movable seat 400 and the fixed seat 100 are fitted together in a vertical sliding direction, and the lifting and lowering of the movable seat 400 can be directly controlled by the lifting cylinder 401, the lifting cylinder 401 can apply pressure to the paper surface on the one hand, and at the same time, when the paper is broken and there is no paper at the calendering area, the lifting cylinder 401 can make the soft roller 300 fall quickly, so that the soft roller 300 quickly leaves the hot roller 200 to avoid damage to the roller surface.

[0046] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A soft roller calender with a roller surface anti-scalding mechanism, comprising a fixed base, a hot roller and a soft roller, wherein the fixed base is in the shape of a U-shaped Chinese character, and the hot roller and the soft roller are respectively arranged on the upper and lower sides of the fixed base, and the two are parallel and aligned. Also includes: A movable seat is provided above the fixed seat, the movable seat is slidably matched with the fixed seat in the vertical direction, the hot roller is rotatably connected to the fixed seat, and the soft roller is rotatably connected to the movable seat; An air cooling mechanism, the air cooling mechanism comprising two air blowing parts, the two air blowing parts being respectively arranged below the soft roller, the air blowing parts comprising an air supply belt and two rotating shafts, the air supply belt being sleeved on the outside of the two rotating shafts, and the air supply belt being in an arc shape, the upper surface of the air supply belt being in contact with the roller surface of the soft roller; The two blowing parts are also connected to an external air source, and the air supply belt is also provided with air holes for ventilation, and the air holes are used to discharge the cold air provided by the external air source.

2. The soft roller calender with a roller surface anti-scalding mechanism according to claim 1, characterized in that: A fixing plate is provided on the inner side of the fixing seat and below the soft roller, and the two blowing parts are respectively arranged on the left and right sides of the top surface of the fixing plate.

3. The soft roller calender with a roller surface anti-scalding mechanism according to claim 1, characterized in that: The blowing part includes a blowing cover, which is a hollow structure with an open top surface. The air supply belt is arranged on the top inner side of the blowing cover, and the two rotating shafts are respectively rotatably connected to the two side walls of the blowing cover.

4. The soft roller calender with a roller surface anti-scalding mechanism according to claim 3, characterized in that: A pipe hole is provided on one side wall of the bottom of the blowing hood, and a three-way air inlet pipe is provided between the two blowing hoods. The two ends of the three-way air inlet pipe are respectively installed in the pipe holes of the two blowing hoods, and the other end of the three-way air inlet pipe is connected to an external air source.

5. The soft roller calender with a roller surface anti-scalding mechanism according to claim 1, characterized in that: The outer surface of the air supply belt is protrudingly formed with a plurality of ridges, the ridges are distributed along the length direction of the rotating shaft, and the ridges are evenly spaced, and there are a plurality of air holes between two adjacent ridges.

6. The soft roller calender with a roller surface anti-scalding mechanism according to claim 1, characterized in that: A plurality of correction rollers are further provided on the inner side of the air supply belt. The axial direction of the correction rollers is consistent with the axial direction of the rotating shaft, and the correction rollers are in contact with the inner lower surface of the air supply belt to maintain the shape of the air supply belt.

7. The soft roller calender with a roller surface scalding protection mechanism according to claim 1, characterized in that: A top side wall of the blowing part is provided with an arc-shaped through-hole, the shape of which is consistent with the shape of the air supply belt. A blocking plate is movably inserted into the through-hole, and the blocking plate is in contact with the inner upper surface of the air supply belt; a fixing ear is provided at one external end of the blocking plate, and an adjusting bolt is threadedly connected to the fixing ear, and one end of the adjusting bolt is rotatably connected to the outer surface of the blowing part.

8. The soft roller calender with a roller surface anti-scalding mechanism according to claim 2, characterized in that: A lifting cylinder is provided on the top surface of the movable seat, and a movable end of the lifting cylinder is connected to the fixed seat.

9. The soft roller calender with a roller surface anti-scalding mechanism according to claim 8, characterized in that: A driving motor is provided on an outer side wall of the movable seat, the output shaft of the driving motor is coaxially connected to one end of the soft roller, the other end of the soft roller is rotatably connected to a side wall of the movable seat, and movable openings for the end of the soft roller to pass through are opened on the left and right side walls of the fixed seat.

10. The soft roller calender with a roller surface anti-scalding mechanism according to claim 9, characterized in that: Both ends of the fixed plate pass through the fixed seat and are fixedly connected to the inner side wall of the movable seat.

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