Artificial leather production lifting heat shield type heating device

Abstract

A lifting heating hood shell-type heating device for artificial leather production includes a split heating hood, a support frame, a lifting mechanism, and an electrical control cabinet. The split heating hood is horizontally positioned above the guide roller assembly at the outlet of the foaming furnace. The support frame is fixedly mounted on the frame of the guide roller assembly. The lifting mechanism is mounted on the support frame and drives the split heating hood to move up and down. Exhaust ducts are respectively provided on the inner sides of the left and right panels of the split heating hood. Exhaust ports are provided on the left and right front sides of the split heating hood. The left exhaust port is connected to the left exhaust duct, and the right exhaust port is connected to the right exhaust duct. Both exhaust ports are connected to the main exhaust pipe of the foaming furnace via flexible hoses. A PLC controller is installed in the electrical control cabinet, and the PLC controller is connected to the lifting mechanism via signal transmission. This invention shortens the head-removing operation time, reduces idle time, prevents smoke escape, reduces dependence on power supply, and avoids fire accidents.

Description

Technical Field

[0001] This invention relates to the field of PVC calendered artificial leather production, and more specifically, to a lifting and heating hood type heating device for artificial leather production. Background Technology

[0002] To meet customer demands for patterns on PVC calendered artificial leather, after the artificial leather is foamed in a foaming furnace, it needs to be vacuum-printed with patterns on the foaming furnace production line. Before the artificial leather exits the foaming furnace and is printed, a heating hood is used to heat the surface layer (PVC adhesive layer) of the artificial leather until it is molten before the patterns can be fully printed. Traditional heating hoods have the following disadvantages:

[0003] 1) The heating cover is an integral unit. Because the outlet of the heating cover is hooked downwards, in order to facilitate the manual peeling of artificial leather from the needle plate, the heating cover needs to be raised by about 0.7-0.8 meters to facilitate the upper body of the human body to reach under the heating cover to manually remove the head. After removing the head, the heating cover is lowered as a whole. Due to the long stroke and long time, it is a waste of labor time.

[0004] 2) Artificial leather will produce some oil fumes when heated by the heating tubes of the heating hood. The heating hood covers the artificial leather, so the oil fumes cannot be effectively and timely discharged in an organized manner. Although a fume collection hood is installed above the heating hood at the outlet of the foaming furnace, oxygen escape still occurs.

[0005] 3) The lifting device of the heating hood is mostly electric. The motor reducer drives the drive shaft and the sprocket mounted on the shaft to rotate, and the lifting chain is hooked onto the sprocket teeth. The other end of the chain is hinged to the lifting lugs welded to both sides of the heating hood, so as to raise or lower the heating hood. There are weak links from the drive shaft to the lifting lugs and the lifting chain. If any link comes loose, it will cause the heating hood to fall accidentally, which is unsafe. In the event of a power outage, because the heating hood stores a lot of heat, the artificial leather trapped under the heating hood will burn within 3-5 seconds, causing a fire accident.

[0006] 4) Due to temperature variations in the surface layer of the artificial leather, in order to ensure uniform pattern depth across batches, it is necessary to manually raise or lower the heating hood, or increase or decrease the running speed of the artificial leather.

[0007] To address the above drawbacks, this invention provides a lifting and lowering heating hood type heating device for artificial leather production. Summary of the Invention

[0008] The purpose of this invention is to provide a lifting and heating hood type heating device for artificial leather production. This invention has a short head-removing operation time, can reduce idle time, avoid smoke escape, reduce dependence on power supply, and avoid fire accidents.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] The artificial leather production lifting heating hood shell-type heating device includes a split heating hood, a support frame, a lifting mechanism, and an electrical control cabinet. The split heating hood is horizontally positioned above the foaming furnace outlet guide roller group along the front-to-back direction. The support frame is fixedly installed on the frame of the foaming furnace outlet guide roller group and spans across the split heating hood. The lifting mechanism is installed on the support frame and drives the split heating hood to move up and down. The left and right side plates of the split heating hood are respectively provided with exhaust ducts along the front-to-back direction. Exhaust ports are provided on the left and right front sides of the split heating hood. The left exhaust port is connected to the left exhaust duct, and the right exhaust port is connected to the right exhaust duct. The two exhaust ports are connected to the main exhaust pipe of the foaming furnace through flexible hoses. A PLC controller is installed in the electrical control cabinet, and the PLC controller is connected to the lifting mechanism via signals.

[0011] The split heating hood includes a preheating hood, a heat collecting hood, and a tilting mechanism. The preheating hood is horizontally positioned above the guide roller assembly at the outlet of the foaming furnace. The heat collecting hood is tilted at the rear of the preheating hood, higher in the front and lower in the back, and is located above and behind the guide roller assembly at the outlet of the foaming furnace. The front, rear, and lower sides of the preheating hood and the heat collecting hood are all open. The rear side of the preheating hood and the front side of the heat collecting hood are hinged together. The tilting mechanism is mounted on the preheating hood and drives the heat collecting hood to tilt up and down. Two exhaust ducts are respectively located on the left and right sides inside the preheating hood. Several heating tubes are installed at intervals between the two exhaust ducts and inside the heat collecting hood. An exhaust port is provided at the connection between the heating tubes and the exhaust ducts. The two exhaust ports are respectively located on the left and right front sides of the preheating hood.

[0012] The support frame includes two left columns and two right columns. The two left columns are fixedly installed at intervals on the upper left side of the frame of the foaming furnace outlet guide roller assembly and located on the left side of the preheating hood. The two right columns are fixedly installed at intervals on the upper right side of the frame of the foaming furnace outlet guide roller assembly and located on the right side of the preheating hood. The two left columns and two right columns are arranged in a rectangular array. A crossbeam is fixedly installed between the tops of the two left columns and two right columns. The crossbeam is a U-shaped channel steel frame. Linear slide rails are fixedly installed vertically on the right side of the two left columns and the left side of the two right columns.

[0013] The lifting mechanism includes two worm gear screw jacks, which are symmetrically fixedly installed on the left and right sides of the crossbeam. A first ball-end nut is threaded onto the lower end of the screw of each worm gear screw jack, and a first lock nut is threaded onto the screw of each worm gear screw jack, pressing against the upper end of the first ball-end nut. Two spaced-ahead sliders are fixedly installed on the left and right sides of the preheating hood. The two sliders on the left are slidably connected to two linear guide rails on the left, and the two sliders on the right are slidably connected to two linear guide rails on the right. First spherical lifting lugs are fixedly installed on the left and right sides of the preheating hood. The lower ball head of the first ball-end nut on the left is coaxially engaged in the first spherical lifting lug on the left, and the lower ball head of the first ball-end nut on the right is coaxially engaged in the first spherical lifting lug on the right. The worms of the two worm gear screw jacks are connected via a drive shaft. A PLC controller is connected to each of the two worm gear screw jacks via signals.

[0014] Two sets of flipping mechanisms are symmetrically arranged on the left and right sides. The left flipping mechanism includes a flipping sprocket, a chain, a second spherical lifting lug, a first adjusting screw, an adjusting sleeve, and a second adjusting screw. The flipping sprocket is coaxially fixedly installed on the left side of the drive shaft. One end of the chain is hinged and meshed with the flipping sprocket. The second spherical lifting lug is fixedly installed on the top left rear side of the heat collection hood and corresponds to the flipping sprocket. The first adjusting screw, adjusting sleeve, and second adjusting screw are arranged sequentially from front to back between the flipping sprocket and the second spherical lifting lug. The center lines of the first adjusting screw, adjusting sleeve, second adjusting screw, and second spherical lifting lug coincide, with the front being higher than the rear. The device is tilted, and the adjusting sleeve is a hollow threaded sleeve. The first adjusting screw is threadedly installed at the front end of the adjusting sleeve, and the second adjusting screw is threadedly installed at the rear end of the adjusting sleeve. The front end of the first adjusting screw is fixedly connected to the rear end of the chain. A first fastening nut that presses against the front end of the adjusting sleeve is threaded on the first adjusting screw. A second fastening nut that presses against the rear end of the adjusting sleeve is threaded on the second adjusting screw. A second ball-head nut is threaded on the rear end of the second adjusting screw. A second locking nut that presses against the front end of the second ball-head nut is threaded on the second adjusting screw. The ball head of the rear end of the second ball-head nut is coaxially engaged in the second spherical lifting lug.

[0015] The front parts of the left and right side plates of the heat collection hood cover the left and right sides of the rear end of the preheating hood, respectively.

[0016] The present invention also includes a temperature measurement and control component, which includes a temperature controller. The temperature controller is installed in the electrical control cabinet. A set of temperature probes is respectively installed on the front and rear sides of the top plate of the preheating hood and at the outlet of the heat collection hood. The temperature controller is connected to the signals of the three sets of temperature probes respectively. The PLC controller is connected to the signal of the temperature controller.

[0017] Both the preheating hood and the heat collection hood have insulation plates installed on their left and right sides along the front-to-back direction. The insulation plate on the left side of the preheating hood is fixed to the right side of the left exhaust duct, and the insulation plate on the right side of the preheating hood is fixed to the left side of the right exhaust duct. The left end of the heating pipe installed between the two exhaust ducts passes through and connects to the insulation plate on the left exhaust duct and the right side plate of the left exhaust duct. The right end of the heating pipe installed between the two exhaust ducts passes through and connects to the insulation plate on the right exhaust duct and the left side plate of the right exhaust duct. Ventilation holes are provided on the upper side of the connection between the right side plate of the left exhaust duct and the insulation plate thereon and the upper side of the connection between the left side plate of the right exhaust duct and the insulation plate thereon and the heating pipe. The ventilation holes are the exhaust gas inlets.

[0018] The invention also includes a cooling air pipe, which is circumferentially fixed inside the split heating cover on the left side and to the right of the left insulation plate, inside the rear side of the split heating cover, and inside the right side of the split heating cover and to the left of the right insulation plate. One end of the cooling air pipe is sealed, and the other end of the cooling air pipe is connected to a compressed air interface. A blowing solenoid valve is provided at the compressed air interface. Several blowing ports are equally spaced on the cooling air pipe. The PLC controller is connected to the blowing solenoid valve.

[0019] The worm gear screw jack is powered by a hydraulic motor, which is connected to the hydraulic station in the workshop through hydraulic pipelines. The hydraulic station is equipped with an accumulator, and the PLC controller is connected to the hydraulic station signal.

[0020] An upper limit switch is installed at the upper end of the linear slide rail, and a lower limit switch is installed at the lower end of the linear slide rail. The PLC controller is connected to the signals of the upper limit switch and the lower limit switch respectively.

[0021] This invention has significant substantive features and remarkable progress compared to existing technologies. Specifically, when the split heating cover of this invention is in the lower position, it is in the working position. The split heating cover covers the top of the foaming furnace outlet guide roller group and is close to the foaming furnace outlet guide roller group. The slider slides to the lower end of the linear slide rail and contacts the lower limit switch. The over-temperature alarm temperature is set by the temperature controller (the highest artificial leather surface temperature + 5°C). Each heating tube heats the artificial leather surface layer. The oil fumes generated by heating enter the two exhaust fans through various vents. The flue gas is then discharged into the main exhaust pipe of the foaming furnace via the exhaust port and hose to prevent flue gas escape. When the temperature probe on the top of the heat collector hood detects a temperature exceeding the over-temperature alarm temperature, the temperature controller outputs an over-temperature alarm bell. At the same time, the PLC controller controls the hydraulic station to work. The hydraulic station supplies hydraulic oil to the hydraulic motor of the worm gear screw jack through the hydraulic pipeline, causing the hydraulic motor of the worm gear screw jack to rotate forward. The screw of the worm gear screw jack then drives the split heating hood to rise a certain distance through the first ball head nut and the first spherical lifting lug. Simultaneously, the worm gear of the worm screw jack drives the tilting sprocket to rotate at a certain angle. The tilting sprocket winds the chain to a certain length, which in turn, through the chain, the first adjusting screw, the adjusting sleeve, the second adjusting screw, the second ball head nut, and the second spherical lifting lug, tilts the heat collection hood upwards at a certain angle. When the temperature probe at the top of the heat collection hood detects that the temperature reaches the fire alarm temperature (the highest artificial leather surface temperature +10℃), the temperature controller outputs a fire alarm bell and the alarm light flashes. At the same time, the PLC controls the hydraulic station and accumulator to simultaneously supply hydraulic oil to... The hydraulic motor of the worm gear screw jack rotates rapidly, causing the split heating hood to rise quickly. Simultaneously, the air blowing solenoid valve opens, and compressed air enters the cooling air pipe through the compressed air interface. The air then blows through various air outlets to disperse and cool the high-temperature gas inside the preheating hood and the heat collection hood, preventing fire. When the split heating hood rises or falls and hits the corresponding upper or lower limit switch, the PLC controller stops the hydraulic motor of the worm gear screw jack to ensure safe operation.

[0022] The lifting mechanism of this invention adopts the combination of a worm gear screw jack, a first ball-head screw nut, and a first spherical lifting lug, which reduces weak points and can effectively prevent the heating cover from falling accidentally, thus ensuring high safety. Moreover, the worm gear screw jack is powered by a hydraulic motor, and the hydraulic station provides hydraulic oil as the power source, reducing dependence on power supply, ensuring that the lifting mechanism can work normally, and avoiding fire accidents.

[0023] The adjusting sleeve can adjust the distance between the hinge point of the flip sprocket and the second spherical lug to ensure the balance of the heat collection cover during flipping.

[0024] When the head is removed, the split heating cover is driven to move upward by a worm gear screw jack. Moreover, the heat collection cover will also be flipped upward at a certain angle by a flipping mechanism when it moves upward. In this way, compared with the traditional heating cover, there is no need to move upward for a long distance. After the head is removed, the downward stroke is shortened, the time is short, and the wasted labor time is reduced. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the split heating cover of the present invention in the working position.

[0026] Figure 2 This is a schematic diagram of the structure of the split heating cover of the present invention when it is in the non-working position.

[0027] Figure 3 This is a top view of the present invention.

[0028] Figure 4 This is a left view of the split heating cover of the present invention.

[0029] Figure 5 This is a bottom view of the split heating cover of the present invention, showing only one heating tube.

[0030] Figure 6 This is a schematic diagram of the flipping mechanism of the present invention.

[0031] Figure 7 This is a schematic diagram of the connection between the heating tube and the exhaust duct of the present invention. Detailed Implementation

[0032] The embodiments of the present invention are further described below with reference to the accompanying drawings.

[0033] like Figure 1-7 As shown, the artificial leather production lifting heating hood shell type heating device includes a split heating hood, a support frame, a lifting mechanism, and an electrical control cabinet (not shown). The split heating hood is horizontally positioned above the foaming furnace outlet guide roller group 1 in the front-to-back direction. The support frame is fixedly installed on the frame of the foaming furnace outlet guide roller group 1 and spans across the split heating hood. The lifting mechanism is installed on the support frame and drives the split heating hood to move up and down. The left and right side plates of the split heating hood are respectively provided with exhaust ducts 2 in the front-to-back direction. The left front side and right front side of the split heating hood are provided with exhaust ports 3. The left exhaust port 3 is connected to the left exhaust duct 2, and the right exhaust port 3 is connected to the right exhaust duct 2. The two exhaust ports 3 are connected to the main exhaust pipe of the foaming furnace (not shown, which is a conventional device in this field) through flexible hoses. A PLC controller is installed in the electrical control cabinet, and the PLC controller is connected to the lifting mechanism via signals.

[0034] The split heating hood includes a preheating hood 4, a heat collecting hood 5, and a flipping mechanism. The preheating hood 4 is horizontally positioned above the foaming furnace outlet guide roller group 1 in the front-to-back direction. The heat collecting hood 5 is inclined and positioned on the rear side of the preheating hood 4, with the front higher than the rear, and is located above and behind the foaming furnace outlet guide roller group 1. The front, rear, and lower sides of the preheating hood 4 are open, and the front and lower sides of the heat collecting hood 5 are also open. The rear side of the preheating hood 4 is hinged to the front side of the heat collecting hood 5 via a hinge 6. The flipping mechanism is installed on the preheating hood 4 and drives the heat collecting hood 5 to flip up and down. Two exhaust ducts 2 are respectively located on the left and right sides inside the preheating hood 4. Several heating tubes 7 are installed at intervals between the two exhaust ducts 2 and inside the heat collecting hood 5. An exhaust port 8 is provided at the connection between the heating tubes 7 and the exhaust ducts 2. Two exhaust ports 3 are respectively located on the left front side and the right front side of the preheating hood 4.

[0035] The support frame includes two left columns 9 and two right columns 10. The two left columns 9 are fixedly installed at intervals on the upper left side of the frame of the foaming furnace outlet guide roller group 1 and located on the left side of the preheating hood 4. The two right columns 10 are fixedly installed at intervals on the upper right side of the frame of the foaming furnace outlet guide roller group 1 and located on the right side of the preheating hood 4. The two left columns 9 and two right columns 10 are arranged in a rectangular array. A crossbeam 11 is fixedly installed between the tops of the two left columns 9 and the two right columns 10. The crossbeam 11 is a U-shaped channel steel frame. Linear slide rails 12 are fixedly installed vertically on the right side of the two left columns 9 and the left side of the two right columns 10.

[0036] The lifting mechanism includes two worm gear screw jacks 13, which are symmetrically fixedly installed on the left and right sides of the crossbeam 11. A first ball-end nut 14 is threaded onto the lower end of the screw of each worm gear screw jack 13, and a first lock nut 15, which presses against the upper end of the first ball-end nut 14, is threaded onto the screw of each worm gear screw jack 13. Two spaced-ahead sliders 16 are fixedly installed on the left and right sides of the preheating hood 4, respectively. The two sliders 16 on the left side are slidably connected to two linear guide rails 12 on the left side, and the two sliders 16 on the right side... Two sliders 16 on the side are slidably connected to two linear slide rails 12 on the right side. The first spherical lifting lugs 17 are fixedly installed on the left and right middle parts of the preheating cover 4. The lower ball head of the first ball head nut 14 on the left is coaxially engaged in the first spherical lifting lug 17 on the left, and the lower ball head of the first ball head nut 14 on the right is coaxially engaged in the first spherical lifting lug 17 on the right. The worms of the two worm gear screw jacks 13 are connected by a transmission shaft 33. The PLC controller is connected to the two worm gear screw jacks 13 by signals respectively.

[0037] Two sets of flipping mechanisms are symmetrically arranged on the left and right sides. The left flipping mechanism includes a flipping sprocket 18, a chain 19, a second spherical lug 20, a first adjusting screw 21, an adjusting sleeve 22, and a second adjusting screw 23. The flipping sprocket 18 is coaxially fixedly installed on the left side of the drive shaft 33. One end of the chain 19 is hinged and meshed with the flipping sprocket 18. The second spherical lug 20 is fixedly installed on the top left rear side of the heat collection hood 5 and corresponds to the flipping sprocket 18. The first adjusting screw 21, the adjusting sleeve 22, and the second adjusting screw 23 are arranged sequentially from front to back between the flipping sprocket 18 and the second spherical lug 20. The center lines of the first adjusting screw 21, the adjusting sleeve 22, the second adjusting screw 23, and the second spherical lug 20 coincide and are higher in the front than in the back. With a low tilt setting, the adjusting sleeve 22 is a hollow screw nut sleeve. The first adjusting screw 21 is threadedly installed at the front end of the adjusting sleeve 22, and the second adjusting screw 23 is threadedly installed at the rear end of the adjusting sleeve 22. The front end of the first adjusting screw 21 is fixedly connected to the rear end of the chain 19. A first fastening nut 24 that presses against the front end of the adjusting sleeve 22 is threadedly installed on the first adjusting screw 21. A second fastening nut 25 that presses against the rear end of the adjusting sleeve 22 is threadedly installed on the second adjusting screw 23. A second ball head screw nut 26 is threadedly installed at the rear end of the second adjusting screw 23. A second locking nut 27 that presses against the front end of the second ball head screw nut 26 is threadedly installed on the second adjusting screw 23. The ball head of the rear end of the second ball head screw nut 26 is coaxially engaged in the second spherical lifting lug 20.

[0038] The front parts of the left and right side plates of the heat collection hood 5 cover the left and right sides of the rear end of the preheating hood 4, respectively (to ensure the seal between the preheating hood 4 and the central heating hood 5 during operation and prevent flue gas from escaping).

[0039] The present invention also includes a temperature measurement and control component, which includes a temperature controller. The temperature controller is installed in the electrical control cabinet. A set of temperature probes 28 are respectively installed on the front and rear sides of the top plate of the preheating cover 4 and at the outlet of the heat collection cover 5. The temperature controller is connected to the three sets of temperature probes 28 respectively. The PLC controller is connected to the temperature controller.

[0040] Both the preheating hood 4 and the heat collection hood 5 have insulation plates 29 arranged along the front-to-back direction on the left and right sides. The insulation plate 29 on the left side of the preheating hood 4 is fixed to the right side of the left exhaust duct 2, and the insulation plate 29 on the right side of the preheating hood 4 is fixed to the left side of the right exhaust duct 2. The left end of the heating pipe 7 installed between the two exhaust ducts 2 passes through and connects to the insulation plate 29 on the left exhaust duct 2 and the right side plate of the left exhaust duct 2. The right end of the heating pipe 7 installed between the two exhaust ducts 2 passes through and connects to the insulation plate 29 on the right exhaust duct 2 and the left side plate of the right exhaust duct 2. Ventilation holes are provided on the upper side of the connection between the right side plate of the left exhaust duct 2 and the insulation plate 29 thereon and the upper side of the connection between the left side plate of the right exhaust duct 2 and the insulation plate 29 thereon and the heating pipe 7. The ventilation holes are the exhaust gas inlets 8.

[0041] The present invention also includes a cooling air pipe 30, which is circumferentially fixed on the inside left side of the split heating cover and on the right side of the left insulation plate 29, the inside rear side of the split heating cover, and the inside right side of the split heating cover and on the left side of the right insulation plate 29. One end of the cooling air pipe 30 is sealed, and the other end of the cooling air pipe 30 is connected to a compressed air interface 31. A blowing solenoid valve is provided at the compressed air interface 31. Several blowing ports 32 are equally spaced on the cooling air pipe 30. The PLC controller is connected to the blowing solenoid valve.

[0042] The worm gear screw jack 13 is powered by a hydraulic motor, which is connected to the hydraulic station in the workshop through a hydraulic pipeline. The hydraulic station is equipped with an accumulator, and the PLC controller is connected to the hydraulic station signal.

[0043] An upper limit switch is provided at the upper end of the linear slide rail 12, and a lower limit switch is provided at the lower end of the linear slide rail 12. The PLC controller is connected to the signals of the upper limit switch and the lower limit switch respectively.

[0044] The electrical control cabinet, PLC controller, temperature controller, air blowing solenoid valve, hydraulic station, accumulator, upper limit switch and lower limit switch are not shown in the figure.

[0045] The PLC controller, heating element 7, temperature controller, worm gear screw jack 13, temperature probe 28, insulation board 29, air blowing solenoid valve, hydraulic motor, hydraulic station, accumulator, upper limit switch and lower limit switch are all conventional devices. Their specific structures and working principles will not be described in detail. The control part in this invention uses conventional control technology and does not involve new computer programs.

[0046] When the split heating cover of this invention is in the lower position, it is in the working position. The split heating cover covers the top of the foaming furnace outlet guide roller group 1 and is close to the foaming furnace outlet guide roller group 1. The slider 16 slides to the lower end of the linear slide rail 12 and contacts the lower limit switch. The over-temperature alarm temperature is set by the temperature controller (the highest artificial leather surface temperature + 5°C). Each heating tube 7 heats the artificial leather surface layer. The oil fumes generated by heating enter the two exhaust ducts 2 through the various vents, and then are discharged into the main exhaust pipe of the foaming furnace through the exhaust port 3 and the hose, avoiding the smoke... In the event of an escape, when the temperature probe 28 on the top of the heat collection hood 5 detects a temperature exceeding the over-temperature alarm temperature, the temperature controller outputs an over-temperature alarm bell. Simultaneously, the PLC controller activates the hydraulic station, which supplies hydraulic oil to the hydraulic motor of the worm gear screw jack 13 via hydraulic pipelines. This causes the hydraulic motor of the worm gear screw jack 13 to rotate forward. The screw of the worm gear screw jack 13, through the first ball-end nut 14 and the first spherical lifting lug 17, lifts the split-type heating hood a certain distance. Simultaneously, the worm of the worm gear screw jack 13 drives the tilting sprocket 1. 8. Rotate a certain angle, flip sprocket 18 winds chain 19 to a certain length, and then through chain 19, first adjusting screw 21, adjusting sleeve 22, second adjusting screw 23, second ball head screw nut 26 and second spherical lifting lug 20, flip the heat collection cover 5 upwards by a certain angle; when the temperature probe 28 at the top of the heat collection cover 5 detects that the temperature reaches the fire alarm temperature (the highest artificial leather surface temperature +10℃), the temperature controller outputs a fire alarm bell and the alarm light flashes. At the same time, the PLC controls the hydraulic station and accumulator to simultaneously supply hydraulic oil to the worm gear screw jack. The hydraulic motor of the worm gear screw jack 13 rotates rapidly, causing the split heating cover to rise quickly. At the same time, the air blowing solenoid valve opens, and compressed air enters the cooling air pipe 30 through the compressed air interface 31. Then, it blows and cools the high-temperature gas in the preheating cover 4 and the heat collection cover 5 through each air blowing port 32 to prevent fire. When the split heating cover rises or falls and hits the corresponding upper limit switch or lower limit switch, the PLC controller controls the hydraulic motor of the worm gear screw jack 13 to stop running to ensure safe operation.

[0047] The lifting mechanism of the present invention adopts the cooperation of a worm gear screw jack 13, a first ball head screw nut 14 and a first spherical lifting lug 17, which reduces weak links and can effectively prevent the heating cover from falling accidentally, thus ensuring high safety. Moreover, the worm gear screw jack 13 is powered by a hydraulic motor, and the hydraulic station provides hydraulic oil as the power source, reducing dependence on power supply, ensuring that the lifting mechanism can work normally, and avoiding fire accidents.

[0048] The adjusting sleeve 22 can adjust the distance between the hinge point of the flipping sprocket 18 and the second spherical lug 20 to ensure the balance of the heat collection cover 5 during flipping.

[0049] When the head is removed, the split heating cover is driven to move upward by the worm gear screw jack 13. Moreover, the heat collection cover 5 will also be flipped upward at a certain angle by the flipping mechanism when it moves upward. In this way, compared with the traditional heating cover, there is no need to move upward for a long distance. After the head is removed, the falling stroke is shortened, the time is short, and the useless working time is reduced.

[0050] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A heating device for artificial leather production, which is a lifting hood shell type, characterized in that: The system includes a split heating hood, a support frame, a lifting mechanism, and an electrical control cabinet. The split heating hood is horizontally positioned above the foaming furnace outlet guide roller assembly along the front-to-back direction. The support frame is fixedly installed on the frame of the foaming furnace outlet guide roller assembly and spans across the split heating hood. The lifting mechanism is installed on the support frame and drives the split heating hood to move up and down. The left and right side panels of the split heating hood are respectively provided with exhaust ducts along the front-to-back direction. The left front side and right front side of the split heating hood are provided with exhaust ports. The left exhaust port is connected to the left exhaust duct, and the right exhaust port is connected to the right exhaust duct. The two exhaust ports are connected to the main exhaust pipe of the foaming furnace through flexible hoses. The electrical control cabinet is equipped with a PLC controller, which is connected to the lifting mechanism via signals. The split heating hood includes a preheating hood, a heat collecting hood, and a flipping mechanism. The preheating hood is horizontally positioned above the guide roller assembly at the outlet of the foaming furnace in the front-to-back direction. The heat collecting hood is inclined at the rear of the preheating hood and located above and behind the guide roller assembly at the outlet of the foaming furnace. The front, rear, and lower sides of the preheating hood and the heat collecting hood are all open. The rear side of the preheating hood and the front side of the heat collecting hood are hinged together by a hinge. The flipping mechanism is installed on the preheating hood and drives the heat collecting hood to flip up and down. Two exhaust ducts are respectively located on the left and right sides inside the preheating hood. Several heating tubes are installed at intervals between the two exhaust ducts and inside the heat collecting hood. An exhaust port is provided at the connection between the heating tubes and the exhaust ducts. The two exhaust ports are respectively located on the left front side and the right front side of the preheating hood. While the lifting mechanism drives the split heating cover to move upward, it also drives the flipping mechanism to flip upward, turning the heat collection cover upward at a certain angle.

2. The artificial leather production lifting heat cover shell type heating device according to claim 1, characterized in that: The support frame includes two left columns and two right columns. The two left columns are fixedly installed at intervals on the upper left side of the frame of the foaming furnace outlet guide roller assembly and located on the left side of the preheating hood. The two right columns are fixedly installed at intervals on the upper right side of the frame of the foaming furnace outlet guide roller assembly and located on the right side of the preheating hood. The two left columns and two right columns are arranged in a rectangular array. A crossbeam is fixedly installed between the tops of the two left columns and two right columns. The crossbeam is a U-shaped channel steel frame. Linear slide rails are fixedly installed vertically on the right side of the two left columns and the left side of the two right columns.

3. The artificial leather production lifting heat cover shell type heating device according to claim 2, characterized in that: The lifting mechanism includes two worm gear screw jacks, which are symmetrically fixedly installed on the left and right sides of the crossbeam. A first ball-end nut is threaded onto the lower end of the screw of each worm gear screw jack, and a first lock nut is threaded onto the screw of each worm gear screw jack, pressing against the upper end of the first ball-end nut. Two spaced-ahead sliders are fixedly installed on the left and right sides of the preheating hood. The two sliders on the left are slidably connected to two linear guide rails on the left, and the two sliders on the right are slidably connected to two linear guide rails on the right. First spherical lifting lugs are fixedly installed on the left and right sides of the preheating hood. The lower ball head of the first ball-end nut on the left is coaxially engaged in the first spherical lifting lug on the left, and the lower ball head of the first ball-end nut on the right is coaxially engaged in the first spherical lifting lug on the right. The worms of the two worm gear screw jacks are connected via a drive shaft. A PLC controller is connected to each of the two worm gear screw jacks via signals.

4. The artificial leather production lifting heat cover shell type heating device according to claim 3, characterized in that: Two sets of flipping mechanisms are symmetrically arranged on the left and right sides. The left flipping mechanism includes a flipping sprocket, a chain, a second spherical lifting lug, a first adjusting screw, an adjusting sleeve, and a second adjusting screw. The flipping sprocket is coaxially fixedly installed on the left side of the drive shaft. One end of the chain is hinged and meshed with the flipping sprocket. The second spherical lifting lug is fixedly installed on the top left rear side of the heat collection hood and corresponds to the flipping sprocket. The first adjusting screw, adjusting sleeve, and second adjusting screw are arranged sequentially from front to back between the flipping sprocket and the second spherical lifting lug. The center lines of the first adjusting screw, adjusting sleeve, second adjusting screw, and second spherical lifting lug coincide, with the front being higher than the rear. The device is tilted, and the adjusting sleeve is a hollow threaded sleeve. The first adjusting screw is threadedly installed at the front end of the adjusting sleeve, and the second adjusting screw is threadedly installed at the rear end of the adjusting sleeve. The front end of the first adjusting screw is fixedly connected to the rear end of the chain. A first fastening nut that presses against the front end of the adjusting sleeve is threaded on the first adjusting screw. A second fastening nut that presses against the rear end of the adjusting sleeve is threaded on the second adjusting screw. A second ball-head nut is threaded on the rear end of the second adjusting screw. A second locking nut that presses against the front end of the second ball-head nut is threaded on the second adjusting screw. The ball head of the rear end of the second ball-head nut is coaxially engaged in the second spherical lifting lug.

5. The artificial leather production lifting heat cover housing type heating device according to claim 1, characterized in that: The front parts of the left and right side plates of the heat collection hood cover the left and right sides of the rear end of the preheating hood, respectively.

6. The artificial leather production lifting heat shield type heating device according to claim 1, characterized in that: It also includes a temperature measurement and control component, which includes a temperature controller. The temperature controller is installed in the electrical control cabinet. A set of temperature probes is installed on the front and rear sides of the top plate of the preheating hood and at the outlet of the heat collection hood. The temperature controller is connected to the signals of the three sets of temperature probes respectively. The PLC controller is connected to the signal of the temperature controller.

7. The artificial leather production lifting and heating hood type heating device according to claim 1, characterized in that: Both the preheating hood and the heat collection hood have insulation plates installed on their left and right sides along the front-to-back direction. The insulation plate on the left side of the preheating hood is fixed to the right side of the left exhaust duct, and the insulation plate on the right side of the preheating hood is fixed to the left side of the right exhaust duct. The left end of the heating pipe installed between the two exhaust ducts passes through and connects to the insulation plate on the left exhaust duct and the right side plate of the left exhaust duct. The right end of the heating pipe installed between the two exhaust ducts passes through and connects to the insulation plate on the right exhaust duct and the left side plate of the right exhaust duct. Ventilation holes are provided on the upper side of the connection between the right side plate of the left exhaust duct and the insulation plate thereon and the upper side of the connection between the left side plate of the right exhaust duct and the insulation plate thereon and the heating pipe. The ventilation holes are the exhaust gas inlets.

8. The artificial leather production lifting heat shield type heating device according to claim 1, characterized in that: It also includes a cooling air pipe, which is fixed circumferentially on the inside left side of the split heating cover and on the right side of the left insulation plate, the inside rear side of the split heating cover, and the inside right side of the split heating cover and on the left side of the right insulation plate. One end of the cooling air pipe is sealed, and the other end of the cooling air pipe is connected to a compressed air interface. A solenoid valve for blowing air is installed at the compressed air interface. Several air blowing ports are evenly spaced on the cooling air pipe. The PLC controller is connected to the solenoid valve for signal transmission.

9. The artificial leather production lifting and heating hood type heating device according to claim 3, characterized in that: The worm gear screw jack is powered by a hydraulic motor, which is connected to the hydraulic station in the workshop through hydraulic pipelines. The hydraulic station is equipped with an accumulator, and the PLC controller is connected to the hydraulic station signal. An upper limit switch is installed at the upper end of the linear slide rail, and a lower limit switch is installed at the lower end of the linear slide rail. The PLC controller is connected to the signals of the upper limit switch and the lower limit switch respectively.

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