Novel four-roller calendering equipment

Abstract

The utility model discloses novel four-roller calendering equipment which comprises a rack, a smoke collecting hood is arranged at the top of the rack, a front roller, an upper roller, a middle roller and a lower roller which are arranged in the left-right direction are rotationally arranged on the rack, a guide roller assembly is arranged on the rear side of the lower roller, and an embossing device is arranged on the rear side of the guide roller assembly. The front side of the exhaust fume collecting hood is provided with an exhaust fume pipe joint and a rectangular window used for penetrating through the swing conveyor, the front rectangular side plate is provided with a telescopic folding type exhaust fume blocking device linked with the swing conveyor, and oil receiving grooves are formed in the periphery of the inner wall of the exhaust fume collecting hood. According to the utility model, oil drops are prevented from being generated on the top of the inner wall of the exhaust fume collecting hood and dripping on PVC (Polyvinyl Chloride) materials, so that the quality of a calendered PVC film is ensured. Oil is prevented from flowing downwards to the ground along the calender, and the workshop environment is kept sanitary. And meanwhile, the rectangular window is blocked and freely stretches out and draws back along with left-right swing of the swing conveyor, oil smoke can flow into the lower horizontal sliding groove to be collected after being condensed, the oil smoke is prevented from dripping on conveyed bars, and the quality of calendered PVC films is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of PVC calendering equipment, and specifically relates to a novel four-roller calendering equipment. Background Art

[0002] At present, PVC film production is carried out by conveying the rods squeezed out from the filter to the first material accumulation area between the front roller and the upper roller of the four-roll calender through a conveyor. In order to ensure that the material level heights on the left, middle and right sides of the first material accumulation area are consistent, a swing conveyor is used as the conveyor. The swing conveyor swings back and forth left and right on the front crossbeam of the four-roll calender through rollers. A smoke hood is provided on the top of the four-roll calender, and a rectangular window is reserved at the bottom of the front rectangular side panel for passing the swing conveyor. During the calendering production process of PVC film, when the PVC rubber material is wrapped around the front roller, upper roller, middle roller and lower roller for calendering, the PVC film will produce a relatively thick DOP oil smoke at high temperature. The DOP oil smoke must be organized to pass through the smoke hood installed on the top of the four-roll calender and enter the oil fume purification equipment through the exhaust pipe connected to the exhaust port. The current smoke hood has the following problems:

[0003] 1) The rectangular window's length along the left-right direction is 5-6 times the width of the swing conveyor. Therefore, it is easy for cold air from outside to intrude into the rectangular window area. It is also easy for oil smoke inside the hood to escape outward, polluting the workshop environment and endangering the health of workers. Currently, there is generally no smoke barrier structure at the rectangular window of the smoke hood. Some people use flexible felt as a smoke barrier structure, but flexible felt is not durable and is easily corroded by oil smoke. The oil droplets condensed on the felt can easily drip onto the rods transported on the swing conveyor, causing quality problems on the surface of the calendered PVC film.

[0004] 2) The smoke hood is a conical shell with a small top and a large bottom. There is a smoke exhaust port on the top of the smoke hood. When the smoke contacts the metal smoke hood, the smoke is cooled and condensed into oil droplets. The dust on the surface of the calender will also condense with the smoke, so the oil droplets are turbid. In particular, the oil droplets at the smoke exhaust port will drip onto the PVC material in the first material accumulation area between the upper roller and the front roller, directly or indirectly contaminating the PVC film, or forming oil spots on the PVC film, which greatly affects the quality of the PVC film.

[0005] 3) The condensed oil flows along the inner wall of the fume hood to the surface of the calender, and continues to flow down along the outer wall of the calender to the ground, polluting the workshop environment. Utility Model Content

[0006] In order to solve the above-mentioned technical problems existing in the prior art, the utility model provides a new four-roller calendering equipment with a reasonable structure, condensed oil droplets are not easy to drip, a telescopic folding smoke shielding structure is arranged in front of the rectangular window on the front side of the smoke collecting hood through which the swing conveyor passes, and the condensed oil droplets are collected to avoid polluting the environment.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions: a novel four-roller calendering equipment, including a frame, a smoke collecting hood is provided on the top of the frame, a front roller, an upper roller, a middle roller and a lower roller are rotatably provided on the frame, all of which are arranged in the left and right directions, wherein the upper roller, the middle roller and the lower roller are arranged in sequence from top to bottom, the front roller is located directly in front of the upper roller, a take-up roller assembly is provided on the rear side of the lower roller, and an embossing device is provided on the rear side of the take-up roller assembly; the smoke collecting hood includes a front rectangular side panel, an arc-shaped top panel, a left fan-shaped side panel and a right fan-shaped side panel, the front side of the arc-shaped top panel is connected to the top edge of the front rectangular side panel, the front side of the left fan-shaped side panel is connected to the left side of the front rectangular side panel, the front side of the right fan-shaped side panel is connected to the right side of the front rectangular side panel, and the left fan The arc-shaped side panel is connected to the arc-shaped side on the left side of the arc-shaped top panel, the arc-shaped side of the right fan-shaped side panel is connected to the arc-shaped side on the right side of the arc-shaped top panel, a smoke exhaust pipe joint is connected to the middle position of the upper part of the front rectangular side panel, a rectangular window for passing through the swing conveyor is opened at the bottom of the front rectangular side panel, a telescopic folding smoke barrier device linked to the swing conveyor is provided on the front rectangular side panel, the lower sides of the arc-shaped top panel, the left fan-shaped side panel and the right fan-shaped side panel are at the same height, the lower side of the front rectangular side panel is lower than the lower side of the arc-shaped top panel, a front oil connecting groove is provided on the lower part of the inner wall of the front rectangular side panel, a rear oil connecting groove is provided on the lower part of the inner wall of the arc-shaped top panel, a left oil connecting groove is provided on the lower part of the inner wall of the left fan-shaped side panel, and a right oil connecting groove is provided on the lower part of the inner wall of the right fan-shaped side panel.

[0008] An upper lifting drive device is provided on the upper part of the frame, which is connected to the left and right ends of the upper roller and is used to adjust the up and down position of the upper roller. A front and rear adjustment drive device is provided on the front side of the frame, which is connected to the left and right ends of the front roller and is used to adjust the front and rear position of the front roller. A lower lifting drive device is provided on the lower side of the frame, which is connected to the left and right ends of the lower roller and is used to adjust the up and down position of the lower roller. An axis cross adjustment device is provided on the front side of the frame, which is located below the front and rear adjustment drive device, and the axis cross adjustment device is connected to the left and right ends of the middle roller. A rolling support device is provided on the frame, which is located below the rear end of the swing conveyor.

[0009] The rear end of the smoke exhaust pipe joint protrudes from the inner surface of the front rectangular side panel, and the front oil trough includes a middle section, a left section and a right section. The middle section is located above the rectangular window, and the length of the middle section is greater than the length of the rectangular window. The left section is located on the left side of the lower part of the rectangular window, and the right section is located on the right side of the lower part of the rectangular window; the outer sides of the front rectangular side panel, the curved top panel, the left fan-shaped side panel and the right fan-shaped side panel are all fixed with reinforcing ribs, among which the reinforcing ribs on the outer side of the curved top panel are arranged in the middle of the curved top panel and are curved; the lower sides of the left fan-shaped side panel and the right fan-shaped side panel are provided with slots for accommodating the lifting reducer at the upper end of the upper lifting drive device, and the left oil trough and the right oil trough are both horizontally arranged above the slots.

[0010] The telescopic folding smoke barrier device includes an upper horizontal chute and a lower horizontal chute, both of which are arranged on the front side of the front rectangular side panel and correspond to each other. The upper horizontal chute and the lower horizontal chute are respectively located above and below the rectangular window. The bottom of the upper horizontal chute is open, and the top of the lower horizontal chute is open. A left telescopic protection unit and a right telescopic protection unit are provided between the upper horizontal chute and the lower horizontal chute. The left telescopic protection unit and the right telescopic protection unit are respectively located on the left and right sides of the swing conveyor passing through the rectangular window. The right side of the left telescopic protection unit is connected to the left side of the swing conveyor, and the left side of the right telescopic protection unit is connected to the right side of the swing conveyor.

[0011] The left telescopic protection unit and the right telescopic protection unit have the same structure and are symmetrical on the left and right; the right telescopic protection unit includes a left U-shaped plate, a middle H-shaped plate and a right U-shaped plate arranged vertically. The cross-sections of the left U-shaped plate and the right U-shaped plate are both U-shaped, and the cross-section of the middle H-shaped plate is H-shaped. The rear side of the left U-shaped plate is open, and the front side of the right U-shaped plate is open. The front half of the left side plate of the middle H-shaped plate extends into the interior of the left U-shaped plate, and the rear half of the right side plate of the middle H-shaped plate extends into the interior of the right U-shaped plate.

[0012] A partition is fixedly provided on the bottom of the upper horizontal chute and the lower horizontal chute along the left and right directions respectively. The upper and lower partitions correspond to each other up and down. The upper partition divides the interior of the upper horizontal chute into an upper front chute and an upper rear chute. The lower partition divides the interior of the lower horizontal chute into a lower front chute and a lower rear chute.

[0013] The upper and lower ends of the left U-shaped plate of the left telescopic protection unit are located in the upper rear chute and the lower rear chute respectively, and the upper and lower ends of the right U-shaped plate of the left telescopic protection unit are located in the upper front chute and the lower front chute respectively;

[0014] The upper and lower ends of the right U-shaped plate of the right telescopic protection unit are respectively located in the upper rear slide groove and the lower rear slide groove, and the upper and lower ends of the left U-shaped plate of the right telescopic protection unit are respectively located in the upper front slide groove and the lower front slide groove.

[0015] Several supporting balls are placed at the bottom of the lower front slide groove. The lower end of the right U-shaped plate of the left telescopic protection unit is fixedly connected to the first rectangular bottom plate, and the lower end of the left U-shaped plate of the right telescopic protection unit is fixedly connected to the second rectangular bottom plate. The bottom surfaces of the first rectangular bottom plate and the second rectangular bottom plate are both rollingly connected to the supporting balls.

[0016] The left U-shaped plate and the upper horizontal slide of the left telescopic protection unit are fixedly connected to the front rectangular side panel by the first countersunk screw, the left U-shaped plate and the lower horizontal slide of the left telescopic protection unit are fixedly connected to the front rectangular side panel by the second countersunk screw, the right U-shaped plate and the upper horizontal slide of the right telescopic protection unit are fixedly connected to the front rectangular side panel by the third countersunk screw, and the right U-shaped plate and the lower horizontal slide of the right telescopic protection unit are fixedly connected to the front rectangular side panel by the fourth countersunk screw.

[0017] The right side of the right U-shaped plate of the left telescopic protection unit and the left side of the swing conveyor, as well as the left side of the left U-shaped plate of the right telescopic protection unit and the right side of the swing conveyor are both connected through a movable hinge assembly.

[0018] The movable hinge assembly includes an upper ear plate, a middle ear plate and a lower ear plate arranged in sequence from top to bottom. The upper ear plate and the lower ear plate are fixedly connected to the swing conveyor, and the middle ear plate is fixedly connected to the U-shaped plate. A long hole is opened on the middle ear plate for the pin shaft to move back and forth in the front and rear directions. The length of the long hole is set along the front and rear direction. A pin shaft passing through the long hole is vertically provided between the upper ear plate and the lower ear plate.

[0019] By adopting the above technical solution, compared with the existing technology, the present invention has the following beneficial effects:

[0020] (1) The smoke exhaust port is set at the front side of the smoke hood, so as to prevent the oil droplets condensed at the smoke exhaust port from falling onto the PVC material in the first material accumulation area between the upper roller and the front roller.

[0021] (2) The top plate and rear side plate of the smoke hood are replaced by a whole piece of curved top plate, which has a good guiding effect on the oil smoke. The condensed oil droplets will flow down along the inner wall of the curved top plate to the rear oil tank.

[0022] (3) The reinforcing ribs of each panel of the smoke hood are set on the outside, so that the inner wall can be smooth without bulges, and oil droplets can be avoided as much as possible. The middle of the curved top plate is provided with curved reinforcing ribs along the height direction to prevent the middle part of the curved top plate from bulging downward and avoid the formation of oil droplets.

[0023] (4) Good sealing performance: The left and right fan-shaped side panels are extended downward, and a slot is reserved to accommodate the lifting reducer at the upper end of the upper lifting drive device. The sealing area is increased, the amount of smoke escape is reduced, and cold air is not easy to enter. The right side of the left telescopic protection unit and the left side of the right telescopic protection unit are flexibly connected to the left and right sides of the swing conveyor respectively; when the swing conveyor swings to the left, the left telescopic protection unit contracts and the right telescopic protection unit extends; when the swing conveyor swings to the right, the left telescopic protection unit extends and the right telescopic protection unit contracts; when the swing conveyor swings back and forth, the left telescopic protection unit and the right telescopic protection unit can always block the rectangular window at the front end of the smoke hood, increasing the sealing area, thereby preventing a large amount of external cold air from invading and the smoke in the smoke hood from escaping.

[0024] (5) The rear end of the exhaust pipe joint protrudes from the inner surface of the front rectangular side panel (about 10mm). The oil droplets condensed in the exhaust pipe joint and at the pipe mouth will gather at the lower edge of the rear end of the exhaust pipe joint and drip into the middle section of the front oil tank. Since a rectangular window is reserved at the bottom of the front rectangular side panel for passing the swing conveyor, the front oil tank is divided into three sections arranged in a triangular shape, with the middle section located above the rectangular window.

[0025] (6) The left telescopic protection unit and the right telescopic protection unit have the same structure and are symmetrical. The left U-shaped plate of the left telescopic protection unit and the right U-shaped plate of the right telescopic protection unit are fixed; the left side plate of the right U-shaped plate of the left telescopic protection unit pulls the right side plate of the middle H-shaped plate to move to the right to achieve extension, and the left side plate of the right U-shaped plate of the left telescopic protection unit pushes the left side plate of the middle H-shaped plate to move to the left to achieve contraction; the right side plate of the left U-shaped plate of the right telescopic protection unit pulls the left side plate of the middle H-shaped plate to move to the left to achieve extension, and the right side plate of the left U-shaped plate of the right telescopic protection unit pushes the right side plate of the middle H-shaped plate to move to the right to achieve contraction.

[0026] (7) The partition is set so that the left U-shaped plate of the left telescopic protection unit and the right U-shaped plate of the right telescopic protection unit are kept in the rear slide groove on the rear side of the partition. The right U-shaped plate of the left telescopic protection unit and the left U-shaped plate of the right telescopic protection unit move left and right in the front slide groove on the front side of the partition. At the same time, the middle H-shaped plate is set between the upper and lower partitions. The bottom of the middle H-shaped plate contacts the upper side of the lower partition and slides left and right. Since the width of the left and right plates of the middle H-shaped plate is slightly smaller than the width of the horizontal slide groove, the middle H-shaped plate always remains in the horizontal direction and does not rotate when sliding left and right, ultimately ensuring that the left telescopic protection unit and the right telescopic protection unit move back and forth very smoothly without any conflict or squeezing.

[0027] (8) The right U-shaped plate of the left telescopic guard unit and the left U-shaped plate of the right telescopic guard unit have the largest left-right movement distance. During the left-right movement, the supporting balls maintain rolling friction with the bottom of the lower front chute to reduce friction. Oil droplets condensed on the rear side of the left telescopic guard unit and the right telescopic guard unit can flow down to the lower horizontal chute for collection. The oil lubricates the supporting balls, further reducing friction and noise.

[0028] (9) The first countersunk screw, the second countersunk screw, the third countersunk screw and the fourth countersunk screw not only fix the left U-shaped plate of the left telescopic protection unit and the right U-shaped plate of the right telescopic protection unit, but also fix the upper horizontal slide groove and the lower horizontal slide groove to the smoke hood, which is convenient for installation and disassembly.

[0029] (10) Since the left and right swing trajectory of the discharge end at the rear end of the swing conveyor is a circular arc segment with the front end as the center, and the left and right telescopic movement of the left and right telescopic protection units are linear motion trajectories in the left and right directions, the left and right telescopic protection units connected to the left and right sides of the swing conveyor need to be connected using a movable hinge assembly. The middle ear plate of the movable hinge assembly is provided with a long hole in the front-to-back direction. The pins connected to the upper and lower ear plates will move forward and backward with the swing conveyor. The pins move forward and backward in the long holes, and at the same time drive the left and right telescopic protection units to move linearly left and right.

[0030] In summary, the utility model has a scientific principle and a simple structure. The smoke exhaust port is opened on the front side. The top plate and the rear side plate of the smoke hood adopt an arc-shaped top plate extending backward to form a smooth structure with an arc-shaped inner surface, so as to avoid oil droplets from being generated on the top of the inner wall of the smoke hood and dripping onto the PVC material, thereby ensuring the quality of the calendered PVC film. At the same time, an oil collecting trough is provided at the lower part of each side plate, and the oil droplets collected through the side plate and the port in the smoke exhaust pipe fall into the oil collecting trough, thereby avoiding flowing down to the ground along the calender, thereby maintaining the sanitation of the workshop environment. At the same time, the rectangular window at the lower front side of the smoke hood for passing the swing conveyor is blocked, and it can freely expand and contract as the swing conveyor swings left and right. After the oil smoke condenses, it can flow into the lower horizontal chute for collection, thereby avoiding dripping onto the conveyed rod material, thereby ensuring the quality of the PVC film after calendering. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0032] Figure 2 This is a front structural diagram of the smoke hood of the utility model;

[0033] Figure 3 yes Figure 2 Left view of;

[0034] Figure 4 yes Figure 2 A top view of

[0035] Figure 5 yes Figure 2 Assembly diagram between the middle right telescopic protection unit and the lower horizontal slide;

[0036] Figure 6 yes Figure 5 A top view of

[0037] Figure 7 is a top view of the lower horizontal chute;

[0038] Figure 8 It is a three-step schematic diagram of the right telescopic protection unit in the utility model from extension to contraction;

[0039] Figure 9 is a schematic elevational structural diagram of a living hinge assembly;

[0040] Figure 10 yes Figure 9 Top view of the middle ear plate. DETAILED DESCRIPTION

[0041] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples.

[0042] Figures 1-10 As shown, a new four-roller calendering equipment of the present invention includes a frame 42, a smoke collecting hood 18 is provided on the top of the frame 42, and a front roller 43, an upper roller 44, a middle roller 45 and a lower roller 46 are rotatably provided on the frame 42, all of which are arranged in the left and right directions, wherein the upper roller 44, the middle roller 45 and the lower roller 46 are arranged in sequence from top to bottom, the front roller 43 is located directly in front of the upper roller 44, and a drawing roller assembly 47 (5 guide rollers) is provided on the rear side of the lower roller 46, and an embossing device 48 is provided on the rear side of the drawing roller assembly 47; the smoke collecting hood 18 includes a front rectangular side panel 1, an arc-shaped top panel 2, a left fan-shaped side panel 3 and a right fan-shaped side panel 4, the front side of the arc-shaped top panel 2 is connected to the top edge of the front rectangular side panel 1, the front side of the left fan-shaped side panel 3 is connected to the left side of the front rectangular side panel 1, and the front side of the right fan-shaped side panel 4 is connected to the right side of the front rectangular side panel 1 The arcuate edge of the left fan-shaped side panel 3 is connected to the left arcuate edge of the arcuate top panel 2, the arcuate edge of the right fan-shaped side panel 4 is connected to the right arcuate edge of the arcuate top panel 2, a smoke exhaust pipe joint 5 is connected to the middle position of the upper part of the front rectangular side panel 1, a rectangular window 11 for passing through the swing conveyor 10 is opened at the bottom of the front rectangular side panel 1, and a telescopic folding smoke barrier 49 linked to the swing conveyor 10 is provided on the front rectangular side panel 1. The lower sides of the arcuate top panel 2, the left fan-shaped side panel 3 and the right fan-shaped side panel 4 are of the same height, the lower side of the front rectangular side panel 1 is lower than the lower side of the arcuate top panel 2, a front oil connecting groove 6 is provided on the lower part of the inner wall of the front rectangular side panel 1, a rear oil connecting groove 7 is provided on the lower part of the inner wall of the arcuate top panel 2, a left oil connecting groove 8 is provided on the lower part of the inner wall of the left fan-shaped side panel 3, and a right oil connecting groove 9 is provided on the lower part of the inner wall of the right fan-shaped side panel 4.

[0043] An upper lifting drive device 16 is provided on the upper part of the frame 42, which is connected to the left and right ends of the upper roller 44 and is used to adjust the upper and lower positions of the upper roller 44. A front and rear adjusting drive device 50 is provided on the front side of the frame 42, which is connected to the left and right ends of the front roller 43 and is used to adjust the front and rear positions of the front roller 43. A lower lifting drive device 51 is provided on the lower side of the frame 42, which is connected to the left and right ends of the lower roller 46 and is used to adjust the upper and lower positions of the lower roller 46. An axis cross adjustment device 52 (used to adjust the angle between the center line of the middle roller 45 and the upper roller 44) is provided on the front side of the frame 42 below the front and rear adjusting drive device 50. The axis cross adjustment device 52 is connected to the left and right ends of the middle roller 45. A rolling support device 53 is provided on the frame 42 below the rear end of the swing conveyor 10.

[0044] The rear end of the smoke exhaust pipe joint 5 protrudes from the inner side surface of the front rectangular side panel 1. A rectangular window 11 for passing the swing conveyor 10 is opened at the bottom of the front rectangular side panel 1. The front oil tank 6 includes a middle section 12, a left section 13 and a right section 14. The middle section 12 is located above the rectangular window 11. The length of the middle section 12 is greater than the length of the rectangular window 11. The left section 13 is located on the left side of the lower part of the rectangular window 11, and the right section 14 is located on the right side of the lower part of the rectangular window 11.

[0045] The outer sides of the front rectangular side panel 1, the curved top panel 2, the left fan-shaped side panel 3 and the right fan-shaped side panel 4 are all fixed with reinforcing ribs 15, among which the reinforcing ribs 15 on the outer side of the curved top panel 2 are arranged in the middle of the curved top panel 2 and are curved.

[0046] The lower sides of the left fan-shaped side plate 3 and the right fan-shaped side plate 4 are provided with a notch 17 for the lifting reducer at the upper end of the upper lifting drive device 16, and the left oil tank 8 and the right oil tank 9 are both horizontally arranged above the notch 17.

[0047] The telescopic folding smoke barrier device 49 includes an upper horizontal chute 19 and a lower horizontal chute 20, both of which are arranged on the front side of the front rectangular side panel 1 and correspond to each other above and below. The upper horizontal chute 19 and the lower horizontal chute 20 are respectively located above and below the rectangular window 11 on the front side of the smoke hood 18. The bottom of the upper horizontal chute 19 is open, and the top of the lower horizontal chute 20 is open. A left telescopic protective unit 21 and a right telescopic protective unit 22 are provided between the upper horizontal chute 19 and the lower horizontal chute 20. The left telescopic protective unit 21 and the right telescopic protective unit 22 are respectively located on the left and right sides of the swing conveyor 10 passing through the rectangular window 11. The right side of the left telescopic protective unit 21 is connected to the left side of the swing conveyor 10, and the left side of the right telescopic protective unit 22 is connected to the right side of the swing conveyor 10.

[0048] The left telescopic protection unit 21 and the right telescopic protection unit 22 have the same structure and are symmetrical on the left and right; the right telescopic protection unit 22 includes a left U-shaped plate 23, a middle H-shaped plate 24 and a right U-shaped plate 25 arranged vertically. The cross-sections of the left U-shaped plate 23 and the right U-shaped plate 25 are both U-shaped, and the cross-section of the middle H-shaped plate 24 is H-shaped. The rear side of the left U-shaped plate 23 is open, and the front side of the right U-shaped plate 25 is open. The front half of the left side plate of the middle H-shaped plate 24 extends into the interior of the left U-shaped plate 23, and the rear half of the right side plate of the middle H-shaped plate 24 extends into the interior of the right U-shaped plate 25.

[0049] A partition plate 26 is fixedly provided at the bottom of the upper horizontal chute 19 and the lower horizontal chute 20 along the left and right directions, and the upper and lower partition plates 26 correspond to each other up and down. The upper partition plate 26 divides the interior of the upper horizontal chute 19 into an upper front chute and an upper rear chute, and the lower partition plate 26 divides the interior of the lower horizontal chute 20 into a lower front chute 27 and a lower rear chute 28.

[0050] The upper and lower ends of the left U-shaped plate 23 of the left telescopic protection unit 21 are respectively located in the upper rear chute and the lower rear chute 28, and the upper and lower ends of the right U-shaped plate 25 of the left telescopic protection unit 21 are respectively located in the upper front chute and the lower front chute 27;

[0051] The upper and lower ends of the right U-shaped plate 25 of the right telescopic protection unit 22 are respectively located in the upper rear slide groove and the lower rear slide groove 28, and the upper and lower ends of the left U-shaped plate 23 of the right telescopic protection unit 22 are respectively located in the upper front slide groove and the lower front slide groove 27.

[0052] Several supporting balls 29 are placed at the bottom of the lower front slide groove 27. The lower end of the right U-shaped plate 25 of the left telescopic protection unit 21 is fixedly connected to the first rectangular bottom plate, and the lower end of the left U-shaped plate 23 of the right telescopic protection unit 22 is fixedly connected to the second rectangular bottom plate 31. The bottom surfaces of the first rectangular bottom plate and the second rectangular bottom plate 31 are both rollingly connected to the supporting balls 29.

[0053] The left U-shaped plate 23 and the upper horizontal slide 19 of the left telescopic protective unit 21 are fixedly connected to the front side panel of the smoke hood 18 by a first countersunk screw 32, the left U-shaped plate 23 and the lower horizontal slide 20 of the left telescopic protective unit 21 are fixedly connected to the front side panel of the smoke hood 18 by a second countersunk screw 33, the right U-shaped plate 25 and the upper horizontal slide 19 of the right telescopic protective unit 22 are fixedly connected to the front side panel of the smoke hood 18 by a third countersunk screw 34, and the right U-shaped plate 25 and the lower horizontal slide 20 of the right telescopic protective unit 22 are fixedly connected to the front side panel of the smoke hood 18 by a fourth countersunk screw 35.

[0054] The right side of the right U-shaped plate 25 of the left telescopic protection unit 21 and the left side of the swing conveyor 10 , and the left side of the left U-shaped plate 23 of the right telescopic protection unit 22 and the right side of the swing conveyor 10 are both connected by a movable hinge assembly 36 .

[0055] The movable hinge assembly 36 includes an upper ear plate 37, a middle ear plate 38 and a lower ear plate 39 arranged in sequence from top to bottom. The upper ear plate 37 and the lower ear plate 39 are fixedly connected to the swing conveyor 10, and the middle ear plate 38 is fixedly connected to the U-shaped plate. A long hole 41 is opened on the middle ear plate 38 for the pin shaft 40 to move back and forth in the front and rear directions. The length of the long hole 41 is set along the front and rear direction. A pin shaft 40 passing through the long hole 41 is vertically provided between the upper ear plate 37 and the lower ear plate 39.

[0056] The working process of the present invention is as follows: the swing conveyor 10 conveys the rod material extruded by the filter to the first material accumulation area between the front roller 43 and the upper roller 44 of the four-roll calender, and the front roller 43, the upper roller 44, the middle roller 45 and the lower roller 46 are driven by a power device (not shown) to rotate. The front roller 43 and the upper roller 44 calender the rod material into a sheet product, and then pass it in turn between the bottom of the upper roller 44 and the middle roller 45, and between the bottom of the middle roller 45 and the lower roller 46, and calender it into a PVC film, which is conveyed backward from the bottom of the lower roller 46 to the take-up roller assembly 47. The take-up roller assembly 47 draws out the PVC film and conveys it backward to the embossing device 48. The embossing device 48 embosses a pattern on the surface of the PVC film. When the swing conveyor 10 is conveying rods, the rear end of the swing conveyor 10 rolls left and right on the rolling support device 53 (the rolling trajectory is an arc), and the right side of the left telescopic protection unit and the left side of the right telescopic protection unit are flexibly connected to the left and right sides of the swing conveyor 10 through the movable hinge assembly 36 respectively; when the swing conveyor 10 swings to the left, the left telescopic protection unit 21 contracts and the right telescopic protection unit 22 extends; when the swing conveyor 10 swings to the right, the left telescopic protection unit 21 extends and the right telescopic protection unit 22 contracts; when the swing conveyor 10 swings back and forth left and right, the left telescopic protection unit 21 and the right telescopic protection unit 22 can always block the rectangular window 11 at the front end of the smoke hood 18, thereby preventing a large amount of external cold air from invading and the oil smoke in the smoke hood 18 from escaping to the outside.

[0057] The technical solution of the utility model has the following beneficial effects:

[0058] (1) The smoke exhaust port is arranged at the front side of the smoke collecting hood 18, so as to prevent the oil droplets condensed at the smoke exhaust port from falling onto the PVC material in the first material accumulation area between the upper roller 44 and the front roller 43.

[0059] (2) The top plate and rear side plate of the smoke hood 18 are replaced by a whole piece of arc-shaped top plate 2, which has a good guiding effect on the oil smoke. The condensed oil droplets will flow down along the inner wall of the arc-shaped top plate 2 to the rear oil tank 7.

[0060] (3) The reinforcing ribs 15 of each plate of the smoke hood 18 are all arranged on the outside, so that the inner wall is smooth and free of protrusions, thus minimizing the formation of oil droplets. The middle of the curved top plate 2 is provided with an arc-shaped reinforcing rib 15 along the height direction to prevent the middle part of the curved top plate 2 from bulging downward, thus avoiding the formation of oil droplets.

[0061] (4) The left and right fan-shaped side panels 3 and 4 are extended downward, leaving a slot 17 for accommodating the upper roller 44 lifting reducer 16. This increases the sealing area, reduces the amount of smoke escaping, and prevents cold air from entering. As the swing conveyor 10 swings back and forth, the left and right telescopic protective units can always block the rectangular window 11 at the front end of the smoke hood 18, increasing the sealing area and preventing a large amount of external cold air from intruding and the smoke inside the smoke hood 18 from escaping.

[0062] (5) The rear end of the exhaust pipe joint 5 protrudes from the inner surface of the front rectangular side panel 1 (about 10 mm). The oil droplets condensed in the exhaust pipe joint 5 and at the pipe mouth will gather at the lower edge of the rear end of the exhaust pipe joint 5 and drip into the middle section 12 of the front oil tank 6. Since a rectangular window 11 is reserved at the bottom of the front rectangular side panel 1 for passing the swing conveyor 10, the front oil tank 6 is divided into three sections arranged in a herringbone shape, with the middle section 12 set above the rectangular window 11.

[0063] (6) The left telescopic protection unit 21 and the right telescopic protection unit 22 have the same structure and are symmetrical. The left U-shaped plate 23 of the left telescopic protection unit 21 and the right U-shaped plate 25 of the right telescopic protection unit 22 are fixed; the left side plate of the right U-shaped plate 25 of the left telescopic protection unit 21 pulls the right side plate of the middle H-shaped plate 24 to move to the right to achieve extension, and the left side plate of the right U-shaped plate 25 of the left telescopic protection unit 21 pushes the left side plate of the middle H-shaped plate 24 to move to the left to achieve contraction; the right side plate of the left U-shaped plate 23 of the right telescopic protection unit 22 pulls the left side plate of the middle H-shaped plate 24 to move to the left to achieve extension, and the right side plate of the left U-shaped plate 23 of the right telescopic protection unit 22 pushes the right side plate of the middle H-shaped plate 24 to move to the right to achieve contraction.

[0064] (7) The setting of the partition 26 allows the left U-shaped plate 23 of the left telescopic protective unit 21 and the right U-shaped plate 25 of the right telescopic protective unit 22 to remain in the rear chute on the rear side of the partition 26. The right U-shaped plate 25 of the left telescopic protective unit 21 and the left U-shaped plate 23 of the right telescopic protective unit 22 move left and right in the front chute on the front side of the partition 26. At the same time, the middle H-shaped plate 24 is set between the upper and lower partitions 26. The bottom of the middle H-shaped plate 24 contacts the upper side of the lower partition 26 and slides left and right. Since the width of the left and right plates of the middle H-shaped plate 24 is slightly smaller than the width of the horizontal chute, the middle H-shaped plate 24 always remains in the horizontal direction and does not rotate when sliding left and right, ultimately ensuring that the left telescopic protective unit 21 and the right telescopic protective unit 22 move back and forth very smoothly without any conflict or squeezing.

[0065] (8) The right U-shaped plate 25 of the left telescopic guard unit 21 and the left U-shaped plate 23 of the right telescopic guard unit 22 move the greatest distance to the left and right. During this movement, rolling friction is maintained between the support balls 29 and the bottom of the lower front chute 27, reducing friction. Oil droplets condensed on the rear sides of the left telescopic guard unit 21 and the right telescopic guard unit 22 can flow down to the lower horizontal chute 20 for collection. The oil lubricates the support balls 29, further reducing friction and noise.

[0066] (9) The first countersunk screw 32, the second countersunk screw 33, the third countersunk screw 34 and the fourth countersunk screw 35 not only serve to fix the left U-shaped plate 23 of the left telescopic protection unit 21 and the right U-shaped plate 25 of the right telescopic protection unit 22, but also serve to fix the upper horizontal slide 19 and the lower horizontal slide 20 to the smoke hood 18, which also facilitates installation and disassembly.

[0067] (10) Since the left and right swing trajectory of the discharge end at the rear end of the swing conveyor is a circular arc segment with the front end as the center, and the left and right telescopic movement of the left telescopic protection unit 21 and the right telescopic protection unit 22 is a linear motion trajectory in the left and right directions, the left telescopic protection unit 21 and the right telescopic protection unit 22 connected to the left and right sides of the swing conveyor respectively need to be connected by a movable hinge assembly 36. The middle ear plate 38 of the movable hinge assembly 36 is provided with a long hole 41 in the front-to-back direction. The pin 40 connected to the upper ear plate 37 and the lower ear plate 39 will move forward and backward with the swing conveyor 10. The pin 40 moves forward and backward in the long hole 41, and at the same time drives the left telescopic protection unit 21 and the right telescopic protection unit 22 to move left and right linearly.

[0068] It should be emphasized that the upper lifting drive device 16, the front and rear adjustment drive device 50, the lower lifting drive device 51, the axis cross adjustment device 52, the rolling support device 53, the embossing device 48, the take-up roller assembly 47, the swing conveyor 10 and the power device for driving the front roller 43, the upper roller 44, the middle roller 45 and the lower roller 46 to rotate in the utility model have not been improved and are all existing technologies. Their specific structure and working principle will not be repeated.

[0069] The above embodiments illustrate the basic principles and features of the present invention. However, the above merely illustrates preferred embodiments of the present invention and is not intended to limit the present invention to the embodiments described. Persons skilled in the art, inspired by this patent, may make various modifications and improvements without departing from the spirit of the present invention and the scope of protection of the claims, all of which fall within the scope of protection of the present invention. Therefore, the patent and scope of protection of this utility model shall be subject to the appended claims.

Claims

1. A novel four-roller calendering equipment, comprising a frame with a fume hood on top, a front roller, an upper roller, a middle roller, and a lower roller rotatably arranged in a left-right direction on the frame, wherein the upper roller, the middle roller, and the lower roller are arranged in order from top to bottom, the front roller is located directly in front of the upper roller, a take-up roller assembly is provided behind the lower roller, and an embossing device is provided behind the take-up roller assembly; the characteristics are: The smoke hood includes a front rectangular side panel, an arc-shaped top panel, a left fan-shaped side panel and a right fan-shaped side panel. The front side of the arc-shaped top panel is connected to the top edge of the front rectangular side panel, the front side of the left fan-shaped side panel is connected to the left edge of the front rectangular side panel, the front side of the right fan-shaped side panel is connected to the right edge of the front rectangular side panel, the arc side of the left fan-shaped side panel is connected to the left arc side of the arc-shaped top panel, the arc side of the right fan-shaped side panel is connected to the right arc side of the arc-shaped top panel, and a smoke exhaust pipe joint is connected to the middle position of the upper part of the front rectangular side panel. A rectangular window is provided at the bottom of the plate for passing through the swing conveyor, and a telescopic folding smoke barrier device linked to the swing conveyor is provided on the front rectangular side panel. The lower sides of the curved top panel, the left fan-shaped side panel and the right fan-shaped side panel are of the same height, and the lower side of the front rectangular side panel is lower than the lower side of the curved top panel. A front oil trough is provided on the lower part of the inner wall of the front rectangular side panel, a rear oil trough is provided on the lower part of the inner wall of the curved top panel, a left oil trough is provided on the lower part of the inner wall of the left fan-shaped side panel, and a right oil trough is provided on the lower part of the inner wall of the right fan-shaped side panel.

2. A novel four-roller calendering equipment according to claim 1, characterized in that: An upper lifting drive device is provided on the upper part of the frame, which is connected to the left and right ends of the upper roller and is used to adjust the up and down position of the upper roller. A front and rear adjustment drive device is provided on the front side of the frame, which is connected to the left and right ends of the front roller and is used to adjust the front and rear position of the front roller. A lower lifting drive device is provided on the lower side of the frame, which is connected to the left and right ends of the lower roller and is used to adjust the up and down position of the lower roller. An axis cross adjustment device is provided on the front side of the frame, which is located below the front and rear adjustment drive device, and the axis cross adjustment device is connected to the left and right ends of the middle roller. A rolling support device is provided on the frame, which is located below the rear end of the swing conveyor.

3. A novel four-roller calendering equipment according to claim 1 or 2, characterized in that: The rear end of the smoke exhaust pipe joint protrudes from the inner surface of the front rectangular side panel, and the front oil trough includes a middle section, a left section and a right section. The middle section is located above the rectangular window, and the length of the middle section is greater than the length of the rectangular window. The left section is located on the left side of the lower part of the rectangular window, and the right section is located on the right side of the lower part of the rectangular window; the outer sides of the front rectangular side panel, the curved top panel, the left fan-shaped side panel and the right fan-shaped side panel are all fixed with reinforcing ribs, among which the reinforcing ribs on the outer side of the curved top panel are arranged in the middle of the curved top panel and are curved; the lower sides of the left fan-shaped side panel and the right fan-shaped side panel are provided with slots for accommodating the lifting reducer at the upper end of the upper lifting drive device, and the left oil trough and the right oil trough are both horizontally arranged above the slots.

4. A novel four-roller calendering equipment according to claim 1 or 2, characterized in that: The telescopic folding smoke barrier device includes an upper horizontal chute and a lower horizontal chute, both of which are arranged on the front side of the front rectangular side panel and correspond to each other. The upper horizontal chute and the lower horizontal chute are respectively located above and below the rectangular window. The bottom of the upper horizontal chute is open, and the top of the lower horizontal chute is open. A left telescopic protection unit and a right telescopic protection unit are provided between the upper horizontal chute and the lower horizontal chute. The left telescopic protection unit and the right telescopic protection unit are respectively located on the left and right sides of the swing conveyor passing through the rectangular window. The right side of the left telescopic protection unit is connected to the left side of the swing conveyor, and the left side of the right telescopic protection unit is connected to the right side of the swing conveyor.

5. The novel four-roller calendering equipment according to claim 4, characterized in that: The left telescopic protection unit and the right telescopic protection unit have the same structure and are symmetrical on the left and right; the right telescopic protection unit includes a left U-shaped plate, a middle H-shaped plate and a right U-shaped plate arranged vertically. The cross-sections of the left U-shaped plate and the right U-shaped plate are both U-shaped, and the cross-section of the middle H-shaped plate is H-shaped. The rear side of the left U-shaped plate is open, and the front side of the right U-shaped plate is open. The front half of the left side plate of the middle H-shaped plate extends into the interior of the left U-shaped plate, and the rear half of the right side plate of the middle H-shaped plate extends into the interior of the right U-shaped plate.

6. A novel four-roller calendering equipment according to claim 5, characterized in that: A partition is fixedly provided on the bottom of the upper horizontal chute and the lower horizontal chute along the left and right directions respectively. The upper and lower partitions correspond to each other up and down. The upper partition divides the interior of the upper horizontal chute into an upper front chute and an upper rear chute. The lower partition divides the interior of the lower horizontal chute into a lower front chute and a lower rear chute. The upper and lower ends of the left U-shaped plate of the left telescopic protection unit are located in the upper rear chute and the lower rear chute respectively, and the upper and lower ends of the right U-shaped plate of the left telescopic protection unit are located in the upper front chute and the lower front chute respectively; The upper and lower ends of the right U-shaped plate of the right telescopic protection unit are respectively located in the upper rear slide and the lower rear slide, and the upper and lower ends of the left U-shaped plate of the right telescopic protection unit are respectively located in the upper front slide and the lower front slide.

7. The novel four-roller calendering equipment according to claim 6, characterized in that: Several supporting balls are placed at the bottom of the lower front slide groove. The lower end of the right U-shaped plate of the left telescopic protection unit is fixedly connected to the first rectangular bottom plate, and the lower end of the left U-shaped plate of the right telescopic protection unit is fixedly connected to the second rectangular bottom plate. The bottom surfaces of the first rectangular bottom plate and the second rectangular bottom plate are both rollingly connected to the supporting balls.

8. A novel four-roller calendering equipment according to any one of claims 5 to 7, characterized in that: The left U-shaped plate and the upper horizontal slide of the left telescopic protection unit are fixedly connected to the front rectangular side panel by the first countersunk screw, the left U-shaped plate and the lower horizontal slide of the left telescopic protection unit are fixedly connected to the front rectangular side panel by the second countersunk screw, the right U-shaped plate and the upper horizontal slide of the right telescopic protection unit are fixedly connected to the front rectangular side panel by the third countersunk screw, and the right U-shaped plate and the lower horizontal slide of the right telescopic protection unit are fixedly connected to the front rectangular side panel by the fourth countersunk screw.

9. A novel four-roller calendering equipment according to any one of claims 5 to 7, characterized in that: The right side of the right U-shaped plate of the left telescopic protection unit and the left side of the swing conveyor, as well as the left side of the left U-shaped plate of the right telescopic protection unit and the right side of the swing conveyor are both connected through a movable hinge assembly.

10. The novel four-roll calendering equipment according to claim 9, characterized in that: The movable hinge assembly includes an upper ear plate, a middle ear plate and a lower ear plate arranged in sequence from top to bottom. The upper ear plate and the lower ear plate are fixedly connected to the swing conveyor, and the middle ear plate is fixedly connected to the U-shaped plate. A long hole is opened on the middle ear plate for the pin shaft to move back and forth in the front and rear directions. The length of the long hole is set along the front and rear direction. A pin shaft passing through the long hole is vertically provided between the upper ear plate and the lower ear plate.

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