Air cushion furnace strip conveying device

Abstract

The application belongs to the technical field of strip conveying, and discloses a gas cushion furnace strip conveying device, which comprises a conveying module, each conveying module comprises two triangular plates, a belt is arranged on the triangular plate, the middle part of the belt is bent towards the centroid of the triangular plate, a rectangular block is hingedly connected to the outer side of the triangular plate, the hinge shaft of the rectangular block and the triangular plate is a hollow shaft, a driving roller is arranged in the hollow shaft, a motor is connected to the two ends of the driving roller, a visual sensor is arranged on the side wall of the gas cushion furnace, a limiting module is arranged between the hollow shaft and the rectangular block, the limiting module enables the hollow shaft to rotate only one hundred and twenty degrees relative to the rectangular block each time, the motor power is disconnected after the visual sensor detects the joint of the strip, and the limiting effect of the limiting module is cancelled at the same time; after the conveying module rotates one hundred and twenty degrees, the motor power is connected and the limiting effect of the limiting module on the hollow shaft is restored; the application solves the problem that the coating on the surface of the pinch roller in the existing conveying device is easily worn by the joint of the strip.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of strip conveying, and particularly relates to a strip conveying device for a gas cushion furnace. BACKGROUND

[0002] The gas cushion furnace supports the strip through a gas cushion formed by high-pressure gas under the strip, so the gas cushion furnace has significant advantages in processing of high-finish aluminum strip and copper strip, but also has certain limitations, for example, a pinch roll needs to be arranged at the front end of the gas cushion furnace to ensure that the strip enters the gas cushion furnace stably and smoothly; the existing pinch roll can convey the strip at a stable speed and tension under the action of a driving motor and a tension control module when processing the same coil of strip, but when two coils of strip are spliced, the splice is prone to causing the polyurethane coating on the pinch roll to be abraded due to thickness mutation and irregular shape at the splice, or the perforating effect of a seam welder is poor, and burrs even appear at the splice, so the splice significantly threatens the coating on the roll surface.

[0003] The existing solutions mainly polish the splice to make it smooth, or reduce the pressure setting of the pinch roll and the conveying speed, to reduce the abrasion of the coating, but these solutions still cannot avoid the contact between the splice and the coating on the roll surface, and reducing the conveying speed means reducing the production efficiency, which is inconsistent with the development concept of enterprises, so a new conveying device is still needed to avoid the splice of the strip from easily abrading the coating on the roll surface. SUMMARY

[0004] The application aims to solve the problem that the coating on the surface of the pinch roll in the existing conveying device is easily abraded by the splice of the strip, and provides a strip conveying device for a gas cushion furnace.

[0005] To achieve the above object, the application adopts the following technical scheme:

[0006] The strip conveying device for the gas cushion furnace comprises a gas cushion furnace, two upper and lower symmetrical conveying modules arranged on the side wall of the inlet end of the gas cushion furnace, each conveying module comprising two triangular plates, three round rollers arranged between the two triangular plates, a belt wrapped outside the three round rollers, a restraint module arranged outside the belt, the restraint module being capable of bending the part of the belt not in contact with the round rollers towards the centroid of the triangular plate, a rectangular block hingedly connected to the outside of the triangular plate, an electric push rod fixed to the upper end of the rectangular block, the other end of the electric push rod being fixed to the gas cushion furnace, the hinged shaft of the rectangular block and the triangular plate being a hollow shaft, the hollow shaft being fixedly connected to the triangular plate, a driving roller arranged in the hollow shaft, the middle part of the driving roller being in contact with the belt, the other end of the driving roller being arranged to pass out of the other hollow shaft, and an electric motor connected to both ends of the driving roller.

[0007] The air cushion furnace side wall is provided with a visual sensor, and a limiting module is arranged between the hollow shaft and the rectangular block, the limiting module enables the hollow shaft to rotate only 120 degrees relative to the rectangular block each time, the visual sensor is disconnected after detecting the strip splicing position, and the limiting module cancels the limiting effect; after the transmission module rotates 120 degrees, the motor power is turned on and the limiting effect of the limiting module on the hollow shaft is restored.

[0008] As a further description of the above technical solutions:

[0009] Both ends of the circular roller are connected to the clamping angle of the triangular plate through bearings, the axes of the three circular rollers are parallel to each other, the distance between the axis of the circular roller and the sharp corner of the triangular plate is less than the diameter of the circular roller, thereby realizing that the sharp corner of the triangular plate is located in the axial projection area of the circular roller, only the belt contacts the strip during rotation of the transmission module, and the strip does not interfere with the triangular plate even if it deviates; and the rotating resistance of the three circular rollers is greater than that of the two hollow shafts, so that the self-rotating resistance of the belt is greater than the rotating resistance of the transmission module.

[0010] As a further description of the above technical solutions:

[0011] The constraint module comprises a thin roller, two thin rollers are arranged, both ends of the two thin rollers are connected to the triangular plates on both sides through bearings, and the distance between the axis of the thin roller and the side edge of the triangular plate is greater than the diameter of the thin roller, and a thin roller or a driving roller is arranged on the outer side of the belt between every two circular rollers, thereby realizing the bending of the middle part of the belt to the centroid of the triangular plate.

[0012] As a further description of the above technical solutions:

[0013] The axis of the hollow shaft passes through the centroid of the triangular plate, and a through hole is formed in the triangular plate, the diameter of the through hole is equal to the inner diameter of the hollow shaft, and the driving roller is located in the hollow shaft and the through hole; a universal joint is arranged between the driving roller and the motor, and the universal joint is connected to the driving roller or the motor through splines at both ends; thereby realizing that the driving roller is driven to rotate by the motor, and the driving roller drives the belt to rotate; a one-way bearing is arranged between the driving roller and the universal joint, the one-way bearing enables the universal joint to be driven to move by the driving roller and the belt, and the strip cannot drive the universal joint to rotate by the belt and the driving roller.

[0014] As a further description of the above technical solutions:

[0015] The limiting module comprises three sunken grooves, which are circumferentially distributed on the outer wall of the hollow shaft, a through groove is formed on the sidewall of the rectangular block, a sliding block is arranged in the through groove, one end of the sliding block extends out of the through groove and is fixed with an iron block, a tension spring is arranged between the iron block and the rectangular block, and the other end of the sliding block can be embedded in the sunken groove under the action of the tension spring; thereby, the rotating module can only rotate 120 degrees each time; a shell is fixed outside the through groove, the iron block is located in the inner cavity of the shell, an electromagnet is fixed on the side of the inner cavity of the shell away from the iron block, and the electromagnet can make the sliding block come out of the sunken groove by adsorbing the iron block when the electromagnet is powered on; thereby, the limiting effect of the limiting module is cancelled.

[0016] As a further description of the above technical solutions:

[0017] The visual sensor, the electromagnet and the motor are connected with the controller through the control loop wires, the controller adopts an STM32 single-chip microcomputer, and is used for controlling the power switch of the electromagnet and the motor after processing the sensing signal of the visual sensor.

[0018] As described above, due to the adoption of the above technical solutions, the present application has the following beneficial effects:

[0019] (1) The two compression rollers in the existing pinch roll are replaced by two transmission modules composed of three circular rollers and a belt in the present application, and the belt in the transmission module bends inward under the action of the constraint module, so that when the splicing part of the two coiled strips is conveyed to the lower side of the device, the transmission module can revolve under the pulling of the strip, and the splicing part can pass through from the lower side of the transmission module without contact by "hiding" in the bending position of the belt, thereby avoiding the abrasion of the polyurethane belt by the rough surface of the splicing part and prolonging the service life of the polyurethane belt.

[0020] (2) When the existing pinch roll encounters the splicing part, the splicing part first contacts the two compression rollers, and the splicing part is extruded with the pinch roll due to the fact that the roll gap of the two compression rollers is smaller than the thickness of the splicing part, so that the pressure control device is triggered to actively increase the roll gap, thereby enabling the splicing part to pass through the pinch roll smoothly, and in this process, the tension of the rear strip changes suddenly, and the risk of being pulled off is high; while in the present application, the motor power can be actively disconnected when the splicing part is encountered, and the transmission module revolves under the pulling of the strip, and the splicing part does not extrude the circular roller during the whole process, and the pressure control system always keeps the pressure constant, so the tension change range of the rear strip is small, and the risk of being pulled off is lower.

[0021] (3) The polyurethane coating coated on the outer side of the existing compression roller is replaced by a belt made of polyurethane material in the present application, which not only achieves the effect of non-contact conveying of the splicing part through the curved shape, but also has a slower wear speed during use, and only needs to replace the belt after fatigue aging, without the need to replace the compression roller or re-coat the compression roller, thereby reducing the replacement cost and improving the replacement speed. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 State diagram for the application in use;

[0023] Figure 2 State diagram for the application when the splice is not detected by the two transfer modules;

[0024] Figure 3 State diagram for the application when the splice passes between the two transfer modules;

[0025] Figure 4 Structural diagram of the transfer module of the application;

[0026] Figure 5 Cross-sectional view of the transfer module of the application in the axial direction of the circular shaft;

[0027] Figure 6 Structural diagram of the limiting module of the application.

[0028] Legend: 1, air cushion furnace; 2, transfer module; 3, triangular plate; 4, circular roller; 5, belt; 6, rectangular block; 7, electric push rod; 8, hollow shaft; 9, driving roller; 10, motor; 11, visual sensor; 12, thin roller; 13, universal joint; 14, sink groove; 15, through groove; 16, sliding block; 17, iron block; 18, tension spring; 19, shell; 20, electromagnet. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the application.

[0030] Please refer to Figures 1-6 The application provides a technical solution of a strip conveying device of an air cushion furnace 1.

[0031] The strip conveying device of the air cushion furnace 1 comprises the air cushion furnace 1, and two transfer modules 2 symmetrically arranged above and below the side wall at the inlet end of the air cushion furnace 1. Each transfer module 2 comprises two triangular plates 3, and three circular rollers 4 are arranged between the two triangular plates 3. The two ends of the circular roller 4 are connected to the clamping angle positions of the triangular plates 3 through bearings, the axes of the three circular rollers 4 are parallel to each other, the distance between the axis of the circular roller 4 and the sharp angle of the triangular plate 3 is less than the diameter of the circular roller 4, and thus the sharp angle of the triangular plate 3 is located in the axial projection area of the circular roller 4.

[0032] Three circular rollers 4 are wrapped with a belt 5, and the outer side of the belt 5 is provided with a restraint module, which includes two thin rollers 12, the two ends of the thin rollers 12 are connected with the two triangular plates 3 through bearings, and the distance between the axis of the thin roller 12 and the side edge of the triangular plate 3 is greater than the diameter of the thin roller 12, and one thin roller 12 or a driving roller 9 is arranged on the outer side of the belt 5 between every two circular rollers 4, so as to realize the bending of the middle part of the belt 5 to the centroid of the triangular plate 3.

[0033] Only the belt 5 is in contact with the strip during the rotation of the conveying module 2, and the strip does not interfere with the triangular plate 3 even if it deviates, and the rotation resistance of the three circular rollers 4 is greater than that of the two hollow shafts 8, so that the self-rotation resistance of the belt 5 is greater than the revolution resistance of the transmission module;

[0034] A rectangular block 6 is hinged to the outer side of the triangular plate 3, an electric push rod 7 is fixed to the upper end of the rectangular block 6, the other end of the electric push rod 7 is fixed with the air cushion furnace 1, the hinge shaft of the rectangular block 6 and the triangular plate 3 is a hollow shaft 8, the hollow shaft 8 is fixedly connected with the triangular plate 3, the axis of the hollow shaft 8 passes through the centroid of the triangular plate 3, and a through hole is formed in the triangular plate 3, the diameter of the through hole is equal to the inner diameter of the hollow shaft 8, a driving roller 9 is arranged in the hollow shaft 8, the middle part of the driving roller 9 is in contact with the belt 5, the other end of the driving roller 9 is arranged in the other hollow shaft 8, and a motor 10 is connected with the two ends of the driving roller 9, a universal joint 13 is arranged between the driving roller 9 and the motor 10, and the two ends of the universal joint 13 are connected with the driving roller 9 or the motor 10 through splines; so as to realize the rotation of the driving roller 9 driven by the motor 10, and the rotation of the belt 5 driven by the driving roller 9; a one-way bearing is arranged between the driving roller 9 and the universal joint 13, so that the universal joint 13 can be driven to move by the driving roller 9 and the belt 5, and the strip cannot drive the universal joint 13 to rotate by the belt 5 and the driving roller 9;

[0035] A visual sensor 11 is arranged on the side wall of the air cushion furnace 1, and a limiting module is arranged between the hollow shaft 8 and the rectangular block 6, the limiting module includes three grooves 14, the three grooves 14 are circumferentially arranged on the outer side wall of the hollow shaft 8, a through slot 15 is formed in the side wall of the rectangular block 6, a sliding block 16 is arranged in the through slot 15, one end of the sliding block 16 extends out of the through slot 15 and is fixed with an iron block 17, a tension spring 18 is arranged between the iron block 17 and the rectangular block 6, and the other end of the sliding block 16 can be embedded in the groove 14 under the action of the tension spring 18; so as to realize that the rotation module can only rotate one hundred and twenty degrees at a time; a shell 19 is fixed outside the through slot 15, the iron block 17 is located in the inner cavity of the shell 19, an electromagnet 20 is fixed on the side of the inner cavity of the shell 19 away from the iron block 17, and the electromagnet 20 can make the sliding block 16 come out of the groove 14 by adsorbing the iron block 17 when the electromagnet 20 is electrified, so as to realize that the power supply of the motor 10 is disconnected after the visual sensor 11 detects the splicing position of the strip, and the limiting effect of the limiting module is cancelled at the same time; after the conveying module 2 rotates one hundred and twenty degrees, the power supply of the motor 10 is connected and the limiting effect of the limiting module on the hollow shaft 8 is restored.

[0036] The visual sensor 11, the electromagnet 20 and the motor 10 are connected with the controller through the control loop wire, the controller adopts the STM32 single-chip microcomputer, and is used for controlling the power switch of the electromagnet 20 and the motor 10 after processing the sensing signal of the visual sensor 11.

[0037] Working principle:

[0038] In use, the electric push rod 7 is connected with the existing pressure control system of the pinch roll, when the tension of the strip fluctuates, the pressure control system can change the length of the electric push rod 7, and then change the pressure of the two conveying modules 2 on the strip, so as to control the tension of the strip;

[0039] When the same volume of strip is processed, only one round roller 4 of the two conveying modules 2 supports the extrusion contact of the belt 5 and the strip, one end of the sliding block 16 is located in the sink groove 14, the hollow shaft 8 is fixed relative to the rectangular block 6, the triangular plate 3 does not rotate, the belt 5 is driven to rotate by the motor 10 under the support of the round roller 4, the thin roller 12 and the driving roller 9, and the linear speed of the belt 5 is always equal to the linear speed of the strip; the pressure control system controls the conveying speed and tension of the strip through the two conveying modules 2 in the working process;

[0040] When the processing of the last volume of strip is completed, the end of the strip is spliced with the head of the next volume of strip under the treatment of the belt splicer, and then the spliced part is conveyed to the front of the device, when the visual sensor 11 detects the spliced part, the spliced part is just located below a round roller 4 which does not support the extrusion contact of the belt 5 and the strip, at this time, the visual sensor 11 transmits the detection signal to the controller, the controller gives the electromagnet 20 a set time length of circuit connection, and gives the motor 10 a set time length of circuit disconnection;

[0041] The electromagnetic iron 20 is energized to separate the sliding block 16 from the sink 14 by adsorbing the iron block 17, the limiting effect of the limiting module is cancelled, and the strip is still moved backward under the action of other transmission rollers after the motor 10 stops rotating. The friction between the polyurethane belt 5 and the strip and the circular roller 4 is large, so the strip has a tendency to drive the belt 5 to continue to rotate. Since the rotating resistance of the three circular rollers 4 is greater than that of the two hollow shafts 8, the strip directly drives the transmission module to revolve. Once the pressure between the belt 5 and the strip becomes small, the tension fluctuates, the pressure control system extends the electric push rod 7, thereby continuously compensating the pressure between the belt 5 and the strip, and keeping the tension on the strip relatively stable. At the same time, stable pressure control makes the belt 5 and the strip not slide and rub each other, until the belt 5 and the strip are pressed and contacted by two circular rollers 4 supporting the belt 5 and the strip. At this time, the middle part of the belt 5 is curved to the centroid of the triangular plate 3, and the strip always does not slide and rub the belt 5, so the splicing part is just below the curved part of the belt 5 at this time, and the splicing part does not contact the belt 5, avoiding the edge and burr of the splicing part from causing wear to the belt 5.

[0042] The strip continues to move backward, and the strip gives the rectangular block 6 an oblique upward force through the belt 5 and the circular roller 4, so that the sensing pressure of the pressure control system becomes larger, the electric push rod 7 is shortened, and the transmission module continues to revolve until the rotation angle of the transmission module reaches one hundred and twenty degrees. At this time, the closed circuit of the electromagnetic iron 20 has been disconnected, so the sliding block 16 is embedded into the sink 14 again under the action of the tension spring 18, the hollow shaft 8 is fixed, the revolving module stops rotating, and the circuit of the motor 10 is reconnected. The motor 10 continues to drive the belt 5 to rotate through the universal joint 13 and the driving roller 9. The device returns to the state before the splicing part is detected, and the splicing part has passed from below the transmission module and moved into the air cushion furnace 1.

[0043] In addition, the visual sensor and the controller using the STM32 single-chip microcomputer belong to mature prior art, and various selection and implementation methods can meet the functional requirements of the device. However, the protection scope of the present application is not limited to the described embodiments. Those skilled in the art can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solutions and inventive concepts of the present application, which should be covered within the protection scope of the present application.

Claims

1. A strip conveying device for an air cushion furnace, comprising an air cushion furnace (1), characterized in that, The air cushion furnace (1) has two symmetrical conveying modules (2) on the side wall at the inlet end. Each conveying module (2) includes two triangular plates (3). Three circular rollers (4) are arranged between the two triangular plates (3). The three circular rollers (4) are wrapped with belts (5). A constraint module is provided on the outside of the belts (5). The constraint module can make the part of the belt (5) that is not in contact with the circular rollers (4) bend towards the centroid of the triangular plates (3). A rectangular block (6) is hinged to the outside of the triangular plates (3). An electric push rod (7) is fixed at the upper end of the rectangular block (6). The other end of the electric push rod (7) is fixed to the air cushion furnace (1). The hinge axis between the rectangular block (6) and the triangular plate (3) is a hollow shaft (8). The hollow shaft (8) is fixedly connected to the triangular plate (3). An active roller (9) is provided inside the hollow shaft (8). The middle part of the active roller (9) is in contact with the belt (5). The other end of the active roller (9) passes through the hollow shaft (8) on the other side. Both ends of the active roller (9) are connected to motors (10). A vision sensor (11) is provided on the side wall of the air cushion furnace (1). A limiting module is provided between the hollow shaft (8) and the rectangular block (6). The limiting module allows the hollow shaft (8) to rotate only 120 degrees relative to the rectangular block (6) at a time. After the vision sensor (11) detects the splicing point of the strip, the power supply of the motor (10) is disconnected, and the limiting module cancels the limiting effect. After the conveying module (2) rotates 120 degrees, the power supply of the motor (10) is turned on and the limiting module restores the limiting effect on the hollow shaft (8).

2. The apparatus according to claim 1, characterized in that, Both ends of the roller (4) are connected to the triangle plate (3) at the included angle through bearings. The axes of the three rollers (4) are parallel to each other. The distance between the axis of the roller (4) and the sharp corner of the triangle plate (3) is less than the diameter of the roller (4). The rotational resistance of the three rollers (4) is greater than the rotational resistance of the two hollow shafts (8).

3. The apparatus according to claim 1, characterized in that, The constraint module includes a fine roller (12), and there are two fine rollers (12). Both ends of the two fine rollers (12) are connected to the triangular plates (3) on both sides through bearings. The distance between the axis of the fine roller (12) and the side of the triangular plate (3) is greater than the diameter of the fine roller (12). A fine roller (12) or an active roller (9) is provided on the outside of the belt (5) between each pair of round rollers (4).

4. The apparatus according to claim 1, characterized in that, The axis of the hollow shaft (8) passes through the centroid of the triangular plate (3), and the triangular plate (3) has a through hole with a diameter equal to the inner diameter of the hollow shaft (8). The drive roller (9) is located in the hollow shaft (8) and the through hole. A universal joint (13) is provided between the drive roller (9) and the motor (10). The two ends of the universal joint (13) are connected to the drive roller (9) or the motor (10) through splines. A one-way bearing is provided between the drive roller (9) and the universal joint (13). The one-way bearing enables the universal joint (13) to drive the strip to move through the drive roller (9) and the belt (5), while the strip cannot drive the universal joint (13) to rotate through the belt (5) and the drive roller (9).

5. The apparatus according to claim 1, characterized in that, The limiting module includes a sink (14), three sinks (14) are provided, and the three sinks (14) are evenly distributed on the outer wall of the hollow shaft (8). A through slot (15) is opened on the side wall of the rectangular block (6). A slider (16) is provided in the through slot (15). One end of the slider (16) extends out of the through slot (15) and is fixed with an iron block (17). A tension spring (18) is provided between the iron block (17) and the rectangular block (6). The other end of the slider (16) can be embedded in the sink (14) under the action of the tension spring (18). A housing (19) is fixed on the outside of the through slot (15). The iron block (17) is located in the inner cavity of the housing (19). An electromagnet (20) is fixed on the side of the inner cavity of the housing (19) away from the iron block (17). When the electromagnet (20) is energized, it can attract the iron block (17) to make the slider (16) disengage from the sink (14).

6. The apparatus according to claim 5, characterized in that, The vision sensor (11), electromagnet (20) and motor (10) are all connected to the controller through control loop wires. The controller uses an STM32 microcontroller to process the sensing signal from the vision sensor (11) and control the power switch of the electromagnet (20) and motor (10).

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