CN111235936A - Electric drying cylinder heating system - Google Patents
Electric drying cylinder heating system Download PDFInfo
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- CN111235936A CN111235936A CN202010169903.8A CN202010169903A CN111235936A CN 111235936 A CN111235936 A CN 111235936A CN 202010169903 A CN202010169903 A CN 202010169903A CN 111235936 A CN111235936 A CN 111235936A
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- roller
- ring layer
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- oil
- electric heating
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/022—Heating the cylinders
- D21F5/027—Heating the cylinders using a heat-transfer fluid between the heating means and the cylinder shell
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Abstract
The invention discloses an electric drying cylinder heating system which comprises a rack, wherein a rotating shaft is rotatably connected to the rack, a roller is connected to the rotating shaft, a motor for driving the rotating shaft to rotate is arranged on the rack, the roller is of a circular ring structure, an oil cavity is arranged in the wall thickness direction of the roller, heat conduction oil is contained in the oil cavity, and an electric heating tube is inserted in the oil cavity; the rotating shaft is fixedly connected with an electric slip ring, a carbon brush is arranged on the rack and is tightly propped against the outer peripheral wall of the electric slip ring, and the electric slip ring is electrically connected with the electric heating tube; a temperature sensor is arranged in the roller, a control system is arranged on the rack and is in signal connection with the control system, and the control system is in signal connection with an external power supply on the carbon brush to control the power-on and power-off of the external power supply. The electric drying cylinder heating system is less in heat conduction oil usage amount and higher in heating speed.
Description
Technical Field
The invention relates to the field of paper machines, in particular to an electric drying cylinder heating system.
Background
During the operation of a paper machine, a drying and dewatering operation is required for paper containing water, and a drying cylinder is a component for drying and dewatering the paper. Through heating the dryer to a certain temperature, paper containing moisture is wound on the peripheral wall of the dryer, the paper is fed along with the rotation of the dryer, and the moisture on the paper can be evaporated by the hot peripheral wall of the dryer. The heating mode for the drying cylinder is steam heating, namely steam flows through a hollow area of the drying cylinder to heat the outer peripheral wall of the drying cylinder, but the mode easily causes rusting of the inner peripheral wall of the drying cylinder, and the heat energy utilization rate of the steam heating is low; with the development of the papermaking technology, a method for heating a drying cylinder by using heat conduction oil is adopted, and the heat conduction oil is heated and sprayed into the drying cylinder through a transmission device so as to transfer the heat of the heat conduction oil to the peripheral wall of the drying cylinder. For example, the patent number is 2018211758736, and the single-wall type heat-conducting oil drying cylinder and the heat-conducting oil heating and circulating system thereof are disclosed by the national intellectual property office in 2019, 4, 16, and comprise a drying cylinder body, a drying cylinder end cover, a rotating shaft, a heat-conducting oil inlet pipe, a heat-conducting oil outlet pipe, a rotating siphon pipe, an atomizing cover, an atomizing nozzle component and an oil pump, wherein the heat-conducting oil heating and circulating system heats heat-conducting oil through a heat-conducting oil heating furnace or a solar heat collector, circulates the heat-conducting oil in the drying cylinder body through the oil pump, and sprays the heat-conducting oil on the peripheral wall in the drying cylinder body through the atomizing nozzle component; also like a mica paper drying cylinder assembly disclosed by the national intellectual property office in 2019, 4, 19, the patent number is 201910079864X, the mica paper drying cylinder assembly comprises a drying cylinder and a drying cylinder, wherein an oil cavity, a rotary joint, a circulating oil pump, an electric heating chamber and a high-level oil groove are arranged in the drying cylinder, the drying cylinder assembly heats heat-conducting oil through the electric heating chamber, then the heat-conducting oil is transmitted into the oil cavity through the circulating oil pump, and the heat-conducting oil circulates under the work of the circulating oil pump so as to transmit the heat energy of the heated heat-conducting oil to the drying cylinder; furthermore, the energy-saving papermaking drying cylinder published by the national intellectual property office in 2018, 3, 9 and the application number is 2016108091313, the energy-saving papermaking drying cylinder comprises a drying cylinder and a coil pipe arranged in the concentric interlayer arranged on the inner side of the drying cylinder, the coil pipe is used for heat conduction oil to flow, and two ends of the coil pipe are respectively externally connected with a heating device and a driving device of the heat conduction oil. In general, in the heat conducting oil heating device in the prior art, heat of heated heat conducting oil is transmitted to the outer peripheral wall of a drying cylinder by a heating furnace or an electric heating chamber of an external mechanism and then circulating between the drying cylinder and the electric heating chamber under the transmission of an oil pump; the heat on the heat conduction oil is consumed on the transmission pipeline through the heat conduction oil transmission mode, so that the heat transmission efficiency is low; the inner peripheral wall of the drying cylinder is intermittently and locally contacted with heat conduction oil to conduct heat transfer, the heat transfer between the spray head and the inner peripheral wall of the cylinder body is intermittent and local heat transfer, and the heat transfer between the coiled pipe and the inner peripheral wall of the cylinder body is local heat transfer, so that the heat transfer efficiency between the heat conduction oil and the cylinder body is greatly reduced; in addition, the circulating type heat transfer oil heating cylinder needs more heat transfer oil, because the heat transfer oil needs to be circulated continuously, the heat transfer oil needs to be distributed in the inner peripheral wall area of the whole drying cylinder to achieve the optimal heating effect, and enough heat transfer oil is needed to achieve the heating effect; further analysis shows that the more the quantity of the heat transfer oil is, namely the more the heat transfer oil needs to be heated in the heating process, the heating speed of the drying cylinder is reduced, and a part of heat of the heat transfer oil is wasted in the transmission process. In conclusion, the technology for heating the drying cylinder by using the heat transfer oil in the prior art has the phenomena of low heating speed and large heat transfer oil requirement.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides an electric drying cylinder heating system with less heat transfer oil consumption and higher heating speed.
The technical scheme of the invention is to provide an electric drying cylinder heating system with the following structure: the rotary drum type heat exchanger comprises a rack, wherein a rotating shaft is rotatably connected to the rack, a rotary drum is connected to the rotating shaft, a motor for driving the rotating shaft to rotate is arranged on the rack, the rotary drum is of a circular ring structure, an oil cavity is formed in the wall thickness direction of the rotary drum, heat conduction oil is contained in the oil cavity, and an electric heating tube is inserted in the oil cavity; the rotating shaft is fixedly connected with an electric slip ring, a carbon brush is arranged on the rack and is tightly propped against the outer peripheral wall of the electric slip ring, and the electric slip ring is electrically connected with the electric heating tube; a temperature sensor is arranged in the roller, a control system is arranged on the rack and is in signal connection with the control system, and the control system is in signal connection with an external power supply on the carbon brush to control the power-on and power-off of the external power supply.
After the structure is adopted, compared with the prior art, the electric drying cylinder heating system has the advantages that the heat conduction oil is used as a heat conduction medium, and the heat conduction oil only needs to be filled in an oil cavity area in the wall thickness direction of the roller; when the rotating shaft drives the roller and the electric slip ring to rotate, a power supply can be led into the electric heating pipe through the connection of the electric slip ring and the carbon brush, the electric heating pipe after being electrified can heat-conducting oil in the oil cavity, and the heat-conducting oil can transfer the temperature to the side wall of the roller so as to complete the heating work of the roller; when the temperature of the roller rises to a set value, the temperature sensor feeds back the instant temperature to the control system through the electric slip ring, and the control system cuts off the power supply on the carbon brush to stop heating; when the instant temperature fed back by the temperature sensor is lower than a set value, the control system can be switched on the power supply on the carbon brush to enter a heating state, and the carbon brush works in a circulating mode; in the system, the oil cavity is arranged on the side wall of the roller, so that the using amount of heat conduction oil can be reduced, and the heat of the heat conduction oil wasted in the transmission process can be reduced; the heat conducting oil can fill the annular oil cavity, so that the temperature of each position in the circumferential direction of the roller can be uniformly increased; the heating mode of the electric heating pipe to the annular oil cavity can improve the temperature rise speed of the heat conducting oil, so that the roller can be quickly and uniformly heated. In conclusion, the invention provides the electric drying cylinder heating system with less heat transfer oil consumption and higher heating speed.
Preferably, the drum is of a circular ring structure, namely the drum comprises an inner ring layer and an outer ring layer, the inner ring layer is positioned in the outer ring layer, and the axial length value of the inner ring layer is smaller than that of the outer ring layer; two radial rings are arranged between the inner ring layer and the outer ring layer, and the two radial rings are distributed at two end parts of the inner ring layer; an oil inlet is arranged on one radial ring, and an oil outlet is arranged on the other radial ring; the two radial rings, the outer peripheral wall of the inner ring layer and the inner peripheral wall of the outer ring layer form an oil cavity, and two ends of the electric heating tube are respectively screwed with the two radial rings. Through the preferable arrangement of the inner ring layer and the outer ring layer at intervals, an oil cavity for containing heat conduction oil can be created, the quantity of the heat conduction oil is reduced, and the heating work of the heat conduction oil in the oil cavity can be completed only by ensuring that the radial clearance of the oil cavity can contain the electric heating pipe; in addition, the oil cavity is of a closed circular structure through the two radial rings, the outer circumferential wall of the inner ring layer and the inner circumferential wall of the outer ring layer, and the circular oil cavity can be uniformly heated when the roller rotates to work.
Preferably, a support ring is arranged between the inner ring layer and the outer ring layer and is positioned in the middle of the inner ring layer in the axial direction; the support ring is provided with through holes for the heat pipe to pass through, the support ring is provided with arc-shaped holes for heat conduction oil to flow through, the number of the through holes is equal to that of the arc-shaped holes, the through holes and the arc-shaped holes are distributed at intervals around the axis of the support ring, and the arc-shaped holes are arranged in the middle of the two adjacent through holes. The middle area of the electric heating tube can be supported through the through hole on the optimized support ring, so that the middle part of the electric heating tube is prevented from being insufficiently supported when the middle part of the electric heating tube rotates along with the roller, and the reliability of connection between the electric heating tube and the roller is improved; along the cylinder axis direction, though separated into two cavities with the oil pocket through the support ring, but can communicate the cavity of support ring both sides through the setting in a plurality of arc holes, the conduction oil in the cavity of support ring both sides can circulate each other promptly, and this also can ensure that the cylinder evenly heaies up, avoids cylinder both ends to heat up and has uneven phenomenon.
As an improvement of the invention, the number of the electric heating tubes is multiple, and the number of the through holes is equal to that of the electric heating tubes; the electric heating pipes are uniformly distributed around the axis of the roller and are arranged on the oil cavity along the axis direction of the roller. The optimal selection can enable a plurality of areas in the circumferential direction of the roller to simultaneously heat the heat conduction oil in the oil cavity through a plurality of electric heating tubes, so that the heating speed of the heat conduction oil is increased; moreover, after the roller rotates, the electric heating tubes on the roller can rotate relative to the heat conduction oil, and the heat conduction oil in different circumferential direction areas can be uniformly heated by increasing the number of the electric heating tubes, namely, the heat conduction oil is ensured to be uniformly heated.
As an improvement of the invention, the inner peripheral wall of the inner ring layer is provided with two connecting rings which are distributed at intervals along the axial direction of the roller, and the connecting rings are arranged along the diameter direction of the roller; a sleeve for the rotating shaft to penetrate through is arranged between the two connecting rings, the rotating shaft is connected with two flange plates through keys, radial convex rings are arranged on the flange plates, and the radial convex rings are connected with the connecting rings through screws. The arrangement of the connecting rings can reduce the material requirement of the roller structure from the inner ring layer to the rotating shaft in the diameter direction, namely, the whole weight of the roller is reduced; connect two go-between through the sleeve and can improve the rigidity of whole cylinder, the sleeve passes through the ring flange to be connected with the pivot and can drive the cylinder when can making the pivot rotate and rotate, moreover, the add of ring flange can be more compact and reliable with being connected of pivot.
As an improvement of the invention, the connecting ring is provided with a plurality of round holes, the round holes penetrate through the connecting ring along the axial direction of the roller, and the round holes are uniformly distributed around the axial direction of the roller. The arrangement of the preferred round hole can reduce the material and the weight of the connecting ring, and further reduce the load of the motor driving the roller to rotate.
As an improvement of the invention, the diameter value of the inner wall of the sleeve is larger than that of the rotating shaft, two shaft shoulders are arranged at the matching positions of the rotating shaft and the two flange plates, and the two flange plates are respectively and tightly propped against the two shaft shoulders. The roller can be clamped between the two flange plates by the two flange plates respectively abutting against the two shaft shoulders, namely the roller is clamped on the rotating shaft; the flange plate can be axially limited to the roller through the matching of the shaft shoulder on the rotating shaft and the flange plate, the flange plate can be connected with the roller into a whole through screws, the circumferential direction of the roller on the rotating shaft can be limited through the connection of the flange plate and the rotating shaft key, and then the rotating shaft can be driven to rotate together after being rotated.
As an improvement of the invention, the inner peripheral wall of the outer ring layer is rotatably connected with a baffle, the inner peripheral wall of the outer ring layer is provided with a bump which is used for abutting against or separating from the baffle, a tension spring which is used for pulling the baffle to abut against the bump is arranged between the baffle and the outer ring layer, and the outer peripheral wall of the inner ring layer is provided with a limiting block which is used for abutting against or separating from the baffle; the baffle plates, the tension springs, the convex blocks and the limiting blocks form a plurality of current limiting assemblies, the number of the current limiting assemblies is equal to that of the electric heating tubes, and the current limiting assemblies are positioned between two adjacent electric heating tubes; in the rotating direction of the roller, the current-limiting assembly between two adjacent electric heating tubes is positioned in front of the next electric heating tube, and the opening formed by the baffle and the inner peripheral wall of the outer ring layer faces the rotating direction of the roller; when the roller stops rotating, the baffle rotates to the position of the limiting block under the action of the flowing heat conduction oil. After the roller rotates, the peripheral wall of the inner ring layer and the peripheral wall of the outer ring layer can drive heat conduction oil to flow along the rotation direction of the roller through the contact with the heat conduction oil in the oil cavity, or the heat conduction oil can rotate around the axis of the roller, and the rotation direction of the heat conduction oil is the same as the rotation direction of the roller; however, when the motor stops working, the roller also stops working, namely after the roller stops rotating, the heat conduction oil in the oil cavity continues to rotate under the action of self inertia, at the moment, the heat conduction oil impacts the static electric heating tube, the impact of the part of heat conduction oil can be absorbed through the arrangement of the baffle, and the heat conduction oil under the action of inertia can trigger the baffle to rotate to the position of the limiting block; through the arrangement of the plurality of baffles, when the inertia of the heat conduction oil in the oil cavity is too large, the baffles can be separated from the convex blocks and abut against the limiting blocks, the oil cavity in the circumferential direction can be separated into a plurality of small cavities, each baffle can form a protection effect on the next electric heating tube, the damage and the failure of the electric heating tube due to the inertia impact effect of the heat conduction oil in the oil cavity are avoided, and the working reliability of the electric heating tube is further improved.
As an improvement of the invention, the baffle is arranged between the support ring and the radial ring along the axial direction of the roller, namely the baffle is arranged in the oil cavity of the roller along the length direction of the electric heating pipe. Through the optimization, the area in the length direction of the electric heating tube can be protected through the baffle plate, and the electric heating tube is prevented from being damaged due to inertia impact of heat conduction oil.
As an improvement of the invention, the included angle between the baffle and the electric heating tube in the circumferential direction of the roller is less than 10 degrees. Through the optimization, the baffle can be closer to the electric heating tube area, and the protection effect of the baffle on the electric heating tube is improved.
Drawings
Fig. 1 is a schematic view of the structure of an electric cylinder heating system according to the invention.
Fig. 2 is a cross-sectional view of the electric cylinder heating system of the present invention.
Fig. 3 is a schematic view of another angle of the electric dryer heating system of the present invention.
Fig. 4 is a front view of the electric cylinder heating system of the present invention.
Fig. 5 is a half sectional view of the drum in the present invention.
Fig. 6 is an axial sectional view of the drum in the present invention.
Fig. 7 is a schematic view of the structure of the current-limiting assembly on the drum according to the present invention.
Fig. 8 is a state diagram of the baffle plate in the flow limiting assembly abutting against the limiting block.
Fig. 9 is a partially enlarged view of a flow restricting assembly.
Fig. 10 is a schematic view of the structure of the middle support ring of the drum according to the present invention.
FIG. 11 is a distribution diagram of through holes and arc holes on a support ring according to the present invention.
Fig. 12 is a schematic structural view of the flange plate of the present invention.
Fig. 13 is a schematic structural view of the electric heating tube of the present invention.
Shown in the figure: 1. the device comprises a rack, 2, a rotating shaft, 3, a roller, 4, an oil chamber, 5, an electric heating tube, 6, a carbon brush, 7, an electric slip ring, 8, an inner ring layer, 9, an outer ring layer, 10, a radial ring, 11, a support ring, 12, a through hole, 13, an arc-shaped hole, 14, a connecting ring, 15, a sleeve, 16, a flange plate, 17, a radial convex ring, 18, a round hole, 19, a baffle, 20, a bump, 21, a tension spring, 22, a limiting block, 23, a screw, 24, a cap, 25, a bearing seat, 26 and an oil inlet.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in the figure, the electric drying cylinder heating system comprises a rack 1, wherein the rack 1 is of a frame structure, and a rotating shaft 2 is rotatably connected to the rack 1; a bearing seat 25 is arranged on the frame 1, and two ends of the rotating shaft 2 are arranged in the bearing seat 25 through bearings; the rotary shaft 2 is connected with a roller 3, the frame 1 is provided with a motor for driving the rotary shaft 2 to rotate, the input end of the motor is electrically connected with an external power supply, the output end of the motor is in transmission with the rotary shaft 2 through a gear, the roller 3 is in a circular structure, an oil cavity 4 is arranged in the wall thickness direction of the roller 3, heat conduction oil is contained in the oil cavity 4, an electric heating tube 5 is inserted in the oil cavity 4, and the heat conduction oil is contained in the closed oil cavity 4; the electric heating tube 5 is an electrical element which can convert electric energy into heat energy, and the electric heating tube 5 is connected with the electric slip ring 7 through a lead; the rotating shaft 2 is fixedly connected with an electric slip ring 7, the electric slip ring 7 is connected with the rotating shaft 2 through a key, a carbon brush 6 is arranged on the rack 1, the carbon brush 6 is tightly abutted against the outer peripheral wall of the electric slip ring 7, and the electric slip ring 7 is electrically connected with the electric heating tube 5; the electric slip ring 7 is a slip ring structure used for transmitting electric energy and signals, is specially applied to power supply and signal transmission during continuous rotation, and supplies power to the electric heating tube 5 through the matching of the carbon brush 6 and the electric slip ring 7; a temperature sensor is arranged in the roller 3, a control system is arranged on the rack 1, the temperature sensor is in signal connection with the control system, and the control system is in signal connection with an external power supply on the carbon brush 6 to control the power-on and power-off of the external power supply. In addition, the pressure gauge is arranged on the roller 3, so that the pressure of the roller 3 can be reflected in time; and can also set up the safe pressure valve on the cylinder 3, and then guarantee the whole system is carried on under the absolute safe state, the opening pressure is 0.7-1.0Mpa, when higher than this pressure, the system relieves pressure.
The roller 3 is of a circular ring structure, that is, the roller 3 comprises an inner ring layer 8 and an outer ring layer 9, the inner ring layer 8 is positioned in the outer ring layer 9, the inner ring layer 8 and the outer ring layer 9 are of concentric circle structures, that is, the inner ring layer 8 and the outer ring layer 9 are arranged around the same axis, and the axial length value of the inner ring layer 8 is smaller than that of the outer ring layer 9; two radial rings 10 are arranged between the inner ring layer 8 and the outer ring layer 9, and the two radial rings 10 are distributed at two end parts of the inner ring layer 8; an oil inlet 26 is arranged on one radial ring 10, and an oil outlet is arranged on the other radial ring 10; the two radial rings 10, the outer peripheral wall of the inner ring layer 8 and the inner peripheral wall of the outer ring layer 9 form an oil cavity 4, and two ends of the electric heating tube 5 are respectively screwed with the two radial rings 10. That is, the oil chamber 4 is in the interlayer between the inner ring layer 8 and the outer ring layer 9, the two end parts are sealed by the radial rings 10, heat conduction oil can enter the oil chamber 4 from the oil inlet 26, and the heat conduction oil is discharged from the oil outlet. In the embodiment, the diameter of the outer peripheral wall of the outer ring layer 9 is 1000mm, the axial length of the outer ring layer 9 is 1100mm, and the diameter of the inner peripheral wall of the outer ring layer 9 is 960 mm; the diameter value of the outer peripheral wall of the inner ring layer 8 is 840mm, the diameter value of the inner peripheral wall of the inner ring layer 8 is 800mm, the axial length value of the inner ring layer 8 is 1040mm, and the radial clearance of the oil cavity 4 is 60 mm; that is, the heat conducting oil can uniformly, quickly and effectively heat the peripheral wall of the roller 3 only by accommodating the oil cavity 4 with the full radial gap of 60 mm; the thickness value of the radial rings 10 in the axial direction is 30mm, 8M 30X 1.5 threaded holes are formed in each radial ring 10, the diameter value of the circumference where the threaded holes in the radial rings 10 are located is 900mm, the two radial rings 10 are bilaterally symmetrical on the outer ring layer 9, the distance L1 from the outer sides of the two radial rings 10 to the two end portions of the outer ring layer 9 is 30mm, the threaded hole in one radial ring 10 is used for screwing the upper terminal of the electric heating tube 5, the threaded hole in the other radial ring 10 is used for screwing the cap 24, a blind hole used for accommodating the end portion of the electric heating tube 5 is formed in one end, facing the oil cavity 4, of the cap 24, and the cap 24 is used for supporting the electric heating tube; the size of the oil inlet is M30 × 1.5, and the oil inlet 26 and the oil outlet are symmetrically arranged on the two radial rings 10.
The support ring 11 is arranged between the inner ring layer 8 and the outer ring layer 9, the support ring 11 is located in the middle of the inner ring layer 8 in the axial direction, the thickness value of the support ring 11 in the axial direction is 20mm, the support ring 11 is provided with through holes 12 through which the power supply heat pipes 5 penetrate, the diameter value of the through holes 12 is 30mm, the support ring 11 is provided with arc-shaped holes 13 through which heat conduction oil flows, the number of the through holes 12 is equal to that of the arc-shaped holes 13, the through holes 12 and the arc-shaped holes 13 are distributed around the axial line of the support ring 11 at intervals, the arc-shaped holes 13 are arranged in the middle of two adjacent through holes 12, the number of the through holes 12 and the number of the arc-shaped holes 13 are 8 in the embodiment, two ends of the arc-shaped holes 13 are connected in a semicircular arc shape with the diameter value of 40mm, the circumferential diameters of the arc-shaped holes 13 and the through holes 12 are 915mm, the arc-shaped.
The number of the electric heating tubes 5 is multiple, and the number of the through holes 12 is equal to that of the electric heating tubes 5; the electric heating pipes 5 are uniformly distributed around the axis of the roller 3, and the electric heating pipes 5 are arranged on the oil cavity 4 along the axis direction of the roller 3.
Two connecting rings 14 are arranged on the inner peripheral wall of the inner ring layer 8, and the connecting rings 14 are arranged along the diameter direction of the roller 3; a sleeve 15 for the rotating shaft 2 to pass through is arranged between the two connecting rings 14, after the sleeve 15 is installed on the rotating shaft 2, the axis of the sleeve 15 is overlapped with the axis of the outer ring layer 9, the rotating shaft 2 is connected with two flange plates 16 through keys, a radial convex ring 17 is arranged on each flange plate 16, the radial convex ring 17 is connected with the connecting rings 14 through screws 23, and the screws 23 are screwed at the end part of the sleeve 15 after passing through the radial convex rings 17. The axial distance between the outer sides of the two connecting rings 14 is 760mm, 8 threaded holes with the diameter value of 16mm are respectively formed in the outer side walls of the two ends of the sleeve 15 along the axial direction for screwing the screws 23, the diameter value of the circumference where the threaded holes are located is 250mm, the diameter value of the outer peripheral wall of the sleeve 15 is 280mm, and the diameter value of the inner peripheral wall of the sleeve 15 is 220mm.
The connecting ring 14 is provided with a plurality of round holes 18, the round holes 18 penetrate through the connecting ring 14 along the axial direction of the roller 3, and the round holes 18 are uniformly distributed around the axial line of the roller 3. The number of the round holes 18 is 8, the diameter value of each round hole 18 is 140mm, and the diameter value of the circumference where the round holes 18 are located is 547 mm.
The diameter value of the inner wall of the sleeve 15 is larger than that of the rotating shaft 2, the rotating shaft 2 is provided with two shaft shoulders at the positions matched with the two flange plates 16, and the two flange plates 16 are respectively tightly propped against the two shaft shoulders. The two flanges 16 are symmetrically distributed at two ends of the sleeve 15, and the inner sides of the two flanges 16 respectively abut against the two shaft shoulders.
The inner peripheral wall of the outer ring layer 9 is rotatably connected with a baffle plate 19, the inner peripheral wall of the outer ring layer 9 is provided with a bump 20 which is used for abutting against or separating from the baffle plate 19, a tension spring 21 which is used for pulling the baffle plate 19 to abut against the bump 20 is arranged between the baffle plate 19 and the outer ring layer 9, and the outer peripheral wall of the inner ring layer 8 is provided with a limiting block 22 which is used for abutting against or separating from the baffle plate 19; the baffle 19, the tension spring 21, the bump 20 and the limiting block 22 form a plurality of current-limiting components, the number of the current-limiting components is equal to the number of the electric heating tubes 5, and the current-limiting components are arranged between two adjacent electric heating tubes 5; in the rotating direction of the drum 3, the current-limiting component between two adjacent electric heating tubes 5 is located in front of the next electric heating tube 5, as shown in fig. 7, the drum 3 rotates counterclockwise, the current-limiting component is more deviated between the electric heating tube a and the electric heating tube b to be arranged at the position of the electric heating tube a, and the opening formed by the baffle 19 and the inner peripheral wall of the outer ring layer 9 faces the rotating direction of the drum 3; after the roller 3 stops rotating, the baffle 19 rotates to the position of the limiting block 22 under the action of the flowing heat conduction oil. In FIG. 7, the roller 3 rotates counterclockwise, the heat conducting oil in the oil chamber 4 rotates counterclockwise along with the roller 3, when the roller 3 stops rotating, the heat conducting oil in the oil chamber 4 continues to rotate counterclockwise, and the heat conducting oil flows through the electric heating tube b and the electric heating tube a in sequence, that is, the heat conducting oil flows from the position of the electric heating tube b to the position of the electric heating tube a; the current limiting assembly is arranged at a position which is deviated from one end of the electric heating tube a, and for the current limiting assembly positioned between the electric heating tube b and the electric heating tube a, the baffle plate 19 in the current limiting assembly can block the inertia impact of heat conduction oil positioned between the current limiting assembly and the electric heating tube b, so that the heat conduction oil is prevented from damaging the electric heating tube a; specifically, the oil chamber 4 can be divided into a plurality of small chambers by arranging a plurality of flow limiting assemblies in the circumferential direction of the outer ring layer 9, and the impact of heat conducting oil in each small chamber can be absorbed by the baffle 19 in a closed state; or the heat conduction oil in the annular oil cavity 4 is divided into a plurality of independent heat conduction oil parts, and the impact of each independent heat conduction oil part around the roller 3 in the anticlockwise direction can be absorbed by the baffle 19 at the corresponding position, so that the impact of the heat conduction oil in the oil cavity 4 on each electric heating pipe 5 in the roller 3 can be reduced; when the roller 3 rotates anticlockwise, the baffle 19 abuts against the bump 20, the baffle 19 is separated from the limiting block 22, and the tension spring 21 is in a contracted state; after the roller 3 stops working, the roller 3 is in a static state, but at this time, the heat conduction oil in the oil chamber 4 can continue to rotate counterclockwise, the impact force of the heat conduction oil can act on the opening between the baffle plate 19 and the outer ring layer 9, and the part of the impact force can act on the side wall of the baffle plate 19 facing one side of the tension spring 21, so that the part of the impact force can overcome the constraint of the tension spring 21 on the baffle plate 19, and further the baffle plate 19 is separated from the bump 20, that is, the opening between the baffle plate 19 and the inner peripheral wall of the outer ring layer 9 is enlarged until the baffle plate 19 abuts against the limiting block 22.
The baffles 19 are arranged between the support ring 11 and the radial ring 10 along the axial direction of the drum 3, and the baffles 19 on both sides of the support ring 11 respectively protect two ends of the electrothermal tube 5.
In the circumferential direction of the roller 3, the included angle between the baffle plate 19 and the electric heating tube 5 is less than 10 degrees, which mainly refers to the included angle between the rotating shaft 2 between the baffle plate 19 and the outer ring layer 9 and the axial line of the electric heating tube 5 in the circumferential direction; in this embodiment, the angle between the baffle 19 and the electric heating tube 5 is 7 °.
The working principle is as follows: in the embodiment, the oil cavity 4 is filled with heat conduction oil through the oil inlet until the oil cavity 4 is filled with the heat conduction oil; the number of the electric heating tubes 5 is 8, the power of each electric heating tube 5 is 3kw, then the total power of the electric heating tubes 5 of the embodiment reaches 24kw, and it is assumed that the side wall temperature of the drum 3 is to be heated to 120 ℃; firstly, a motor drives a rotating shaft 2 to rotate, the rotating shaft 2 drives a roller 3 to rotate anticlockwise, an electric slip ring 7 rotates along with the rotating shaft 2, a carbon brush 6 is fixedly connected to a rack 1, namely the electric slip ring 7 rotates relative to the carbon brush 6, an external power supply can be led into an electric heating tube 5 through the relative rotation of the carbon brush 6 and the electric slip ring 7, the electric heating tube 5 can heat conduction oil in an oil cavity 4 until a temperature sensor detects that the temperature of the roller 3 rises to 120 ℃; then, the paper can be dried and dewatered through the peripheral wall of the roller 3 in the rotation process of the roller 3, when heat of the peripheral wall of the roller 3 is lost, namely the temperature sensor detects that the temperature value of the roller 3 is lower than 120 ℃, the temperature sensor sends a signal to a control system, the control system triggers the carbon brush 6 to be powered on, the carbon brush 6 and the electric slip ring 7 continue to supply power to the electric heating pipe 5 to heat conduction oil in the oil cavity 4, the heat conduction oil transfers the heat to the side wall of the roller 3, and the temperature value of the side wall of the roller 3 can reach 120 ℃ in a circulating and reciprocating mode; generally speaking, carry out the speed that 3 periphery walls of cylinder heat through this application device faster, the heat dissipation is slower, heat utilization rate is higher, degree of automation is high moreover, be applicable to frequently opening and stop, noiselessness, temperature control is accurate, 3 lateral walls of cylinder are heated evenly, and the use amount of conduction oil is still little.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the scope of the claims of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an electric dryer heating system, it wraps frame (1), rotates in frame (1) and is connected with pivot (2), is connected with cylinder (3) on pivot (2), is equipped with on frame (1) to be used for driving pivot (2) pivoted motor, its characterized in that: the roller (3) is of a circular ring structure, an oil cavity (4) is arranged in the wall thickness direction of the roller (3), heat conduction oil is contained in the oil cavity (4), and an electric heating pipe (5) is inserted in the oil cavity (4); the rotating shaft (2) is fixedly connected with an electric slip ring (7), a carbon brush (6) is arranged on the rack (1), the carbon brush (6) is tightly propped against the outer peripheral wall of the electric slip ring (7), and the electric slip ring (7) is electrically connected with the electric heating tube (5); a temperature sensor is arranged in the roller (3), a control system is arranged on the rack (1), the temperature sensor is in signal connection with the control system, and the control system is in signal connection with an external power supply on the carbon brush (6) to control the power-on and power-off of the external power supply.
2. An electric cylinder heating system according to claim 1, characterized in that: the roller (3) is of a circular ring structure, namely, the roller (3) comprises an inner ring layer (8) and an outer ring layer (9), the inner ring layer (8) is positioned in the outer ring layer (9), and the axial length value of the inner ring layer (8) is smaller than that of the outer ring layer (9); two radial rings (10) are arranged between the inner ring layer (8) and the outer ring layer (9), and the two radial rings (10) are distributed at two ends of the inner ring layer (8); an oil inlet is formed in one radial ring (10), and an oil outlet is formed in the other radial ring (10); the two radial rings (10), the outer peripheral wall of the inner ring layer (8) and the inner peripheral wall of the outer ring layer (9) form an oil cavity (4), and two ends of the electric heating tube (5) are respectively screwed with the two radial rings (10).
3. An electric cylinder heating system according to claim 2, characterized in that; a support ring (11) is arranged between the inner ring layer (8) and the outer ring layer (9), and the support ring (11) is positioned in the middle of the inner ring layer (8) in the axial direction; be equipped with through-hole (12) that power supply heat pipe (5) passed on support ring (11), be equipped with on support ring (11) and supply arc hole (13) that the conduction oil flows through, through-hole (12) quantity equals with arc hole (13) quantity, and through-hole (12) and arc hole (13) are around support ring (11) axis interval distribution, and arc hole (13) set up the intermediate position in two adjacent through-holes (12).
4. An electric cylinder heating system according to claim 3, characterized in that: the number of the electric heating tubes (5) is more than one, and the number of the through holes (12) is equal to that of the electric heating tubes (5); the electric heating pipes (5) are uniformly distributed around the axis of the roller (3), and the electric heating pipes (5) are arranged on the oil cavity (4) along the axis direction of the roller (3).
5. An electric cylinder heating system according to claim 2, characterized in that: two connecting rings (14) are arranged on the inner peripheral wall of the inner ring layer (8), and the connecting rings (14) are arranged along the diameter direction of the roller (3); a sleeve (15) for the rotating shaft (2) to penetrate is arranged between the two connecting rings (14), the rotating shaft (2) is connected with two flange plates (16) through a key, radial convex rings (17) are arranged on the flange plates (16), and the radial convex rings (17) are connected with the connecting rings (14) through screws (23).
6. An electric cylinder heating system according to claim 5, characterized in that: a plurality of round holes (18) are formed in the connecting ring (14), the round holes (18) penetrate through the connecting ring (14) along the axis direction of the roller (3), and the round holes (18) are evenly distributed around the axis of the roller (3).
7. An electric cylinder heating system according to claim 5, characterized in that: the diameter value of the inner wall of the sleeve (15) is larger than that of the rotating shaft (2), the rotating shaft (2) is provided with two shaft shoulders at the positions matched with the two flange plates (16), and the two flange plates (16) are respectively abutted against the two shaft shoulders.
8. An electric cylinder heating system according to claim 3, characterized in that: the inner peripheral wall of the outer ring layer (9) is rotatably connected with a baffle (19), the inner peripheral wall of the outer ring layer (9) is provided with a lug (20) which is used for being abutted against or separated from the baffle (19), a tension spring (21) which is used for pulling the baffle (19) to abut against the lug (20) is arranged between the baffle (19) and the outer ring layer (9), and the outer peripheral wall of the inner ring layer (8) is provided with a limiting block (22) which is used for being abutted against or separated from the baffle (19); the baffle (19), the tension spring (21), the convex block (20) and the limiting block (22) form a current limiting assembly, a plurality of current limiting assemblies are arranged between the outer ring layer (9) and the inner ring layer (8), the number of the current limiting assemblies is equal to that of the electric heating tubes (5), and the current limiting assemblies are positioned between two adjacent electric heating tubes (5); in the rotating direction of the roller (3), the current-limiting assembly between two adjacent electric heating tubes (5) is positioned in front of the next electric heating tube (5), and the opening formed by the baffle (19) and the inner peripheral wall of the outer ring layer (9) faces the rotating direction of the roller (3); after the roller (3) stops rotating, the baffle (19) rotates to the position of the limiting block (22) under the action of flowing heat conduction oil.
9. An electric cylinder heating system according to claim 8, characterized in that: the baffle (19) is arranged between the support ring (11) and the radial ring (10) in the axial direction of the drum (3).
10. An electric cylinder heating system according to claim 8, characterized in that: in the circumferential direction of the roller (3), the included angle between the baffle (19) and the electric heating tube (5) is less than 10 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010169903.8A CN111235936A (en) | 2020-03-12 | 2020-03-12 | Electric drying cylinder heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010169903.8A CN111235936A (en) | 2020-03-12 | 2020-03-12 | Electric drying cylinder heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111235936A true CN111235936A (en) | 2020-06-05 |
Family
ID=70867384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010169903.8A Withdrawn CN111235936A (en) | 2020-03-12 | 2020-03-12 | Electric drying cylinder heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111235936A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415136A (en) * | 2022-08-17 | 2022-12-02 | 燕山大学 | Curing process device and method for bonding aviation pin shaft and self-lubricating gasket |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB224313A (en) * | 1923-08-20 | 1924-11-13 | Schmidt Otto | Improvements in or relating to drying or heating apparatus |
| US3216489A (en) * | 1961-03-16 | 1965-11-09 | Thermel Inc | Heated and cooled roll |
| CN2597518Y (en) * | 2002-09-27 | 2004-01-07 | 孙义 | Electrothermic paper drier |
| CN201715828U (en) * | 2010-07-02 | 2011-01-19 | 百年精华塑料技术(金华)有限公司 | Electric heating drying device for heat conducting oil |
| CN201779962U (en) * | 2010-07-02 | 2011-03-30 | 百年精华塑料技术(金华)有限公司 | Heat transfer oil electric heating drying device |
| CN204570375U (en) * | 2015-04-08 | 2015-08-19 | 王占江 | A kind of electrical heating drying cylinder |
-
2020
- 2020-03-12 CN CN202010169903.8A patent/CN111235936A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB224313A (en) * | 1923-08-20 | 1924-11-13 | Schmidt Otto | Improvements in or relating to drying or heating apparatus |
| US3216489A (en) * | 1961-03-16 | 1965-11-09 | Thermel Inc | Heated and cooled roll |
| CN2597518Y (en) * | 2002-09-27 | 2004-01-07 | 孙义 | Electrothermic paper drier |
| CN201715828U (en) * | 2010-07-02 | 2011-01-19 | 百年精华塑料技术(金华)有限公司 | Electric heating drying device for heat conducting oil |
| CN201779962U (en) * | 2010-07-02 | 2011-03-30 | 百年精华塑料技术(金华)有限公司 | Heat transfer oil electric heating drying device |
| CN204570375U (en) * | 2015-04-08 | 2015-08-19 | 王占江 | A kind of electrical heating drying cylinder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415136A (en) * | 2022-08-17 | 2022-12-02 | 燕山大学 | Curing process device and method for bonding aviation pin shaft and self-lubricating gasket |
| CN115415136B (en) * | 2022-08-17 | 2023-03-10 | 燕山大学 | Curing process device and method for bonding aviation pin shaft and self-lubricating gasket |
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