Stokehole strip cold shrinkage compensation device

Abstract

The utility model provides a furnace-front strip cold shrinkage compensation device, which is arranged between a heat treatment furnace and a furnace-front tension roller and comprises a fixed rotating roller, a movable rotating roller, a base and a driving hydraulic component, the fixed rotating roller and the movable rotating roller are sequentially arranged on the base, and the driving hydraulic assembly can push the movable rotating roller to move along the base. The utility model has the beneficial effects that the rotating roller in front of the heat treatment furnace is changed from a fixed type to a movable type, and is controlled by a hydraulic control system. And the effect of automatically compensating the cooling shortened length of the aluminum alloy strip can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum alloy production, in particular to a furnace front strip cold shrinkage compensation device. Background Art

[0002] When the continuous heat treatment production line of aluminum alloy automobile plates stops, the temperature in the continuous heat treatment furnace will gradually drop to the room temperature in the workshop, and the aluminum alloy strip in it will cool down as the temperature of the continuous heat treatment furnace decreases, and thus gradually shortens. At the same time, the positions of the tension rollers and other equipment before and after the continuous heat treatment furnace remain unchanged. If the cooling and shortening of the strip is ignored, the equipment will be damaged and the strip will be broken due to excessive strip tension. The existing practice is that when the continuous heat treatment production line of aluminum alloy automobile plates stops, the tension meter in front of the continuous heat treatment furnace will monitor the tension of the strip in real time. The strip cools and shortens, and the corresponding tension will increase. The strip tension value will be displayed on the HMI human-machine interface of the main operation room. When the tension reaches the set value, an alarm message will appear on the HMI human-machine interface of the main operation room. After the operator sees the alarm message, he needs to manually jog the tension roller group in front of the continuous heat treatment furnace to send the strip from the entrance looper to the continuous heat treatment furnace, and the strip tension will be reduced until there is a certain margin of strip in the furnace area. However, as the temperature of the furnace area continues to drop, the strip will continue to cool and shorten, and the strip tension will increase to the set value. The operator will see the alarm message on the HMI interface and will manually jog the tension roller group in front of the furnace to send the strip from the entrance looper to the continuous heat treatment furnace. The disadvantages of the existing approach are:

[0003] 1. After the aluminum alloy automobile plate continuous heat treatment production line stops, the operator must stay in front of the HMI interface in the main operation room. If the operator is negligent, an accident may occur.

[0004] 2. The aluminum alloy automobile plate continuous heat treatment production line must be powered even when it is stopped. If the production line is stopped due to power failure, the tension roller group cannot be manually activated for shrinkage compensation, which may cause an accident. Utility Model Content

[0005] In view of this, the utility model aims to provide a furnace front strip shrinkage compensation device to solve the problem that if the operator is negligent, it may cause an accident.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] The cold shrinkage compensation device of the strip in front of the furnace is arranged between the heat treatment furnace and the tension roller in front of the furnace. The cold shrinkage compensation device of the strip in front of the furnace includes a fixed rotating roller, a movable rotating roller, a base, and a driving hydraulic component;

[0008] The fixed rotating roller and the movable rotating roller are arranged on the base in sequence, and the driving hydraulic component can push the movable rotating roller to move along the base.

[0009] Further, the fixed rotating roller is arranged on the base through a fixed frame;

[0010] Both ends of the fixed rotating roller are rotatably arranged on a fixed frame, and the fixed rotating roller is arranged on a side close to the heat treatment furnace;

[0011] The two sides of the movable rotating roller are arranged on the base through the movable frame, and the two ends of the movable rotating roller are rotatably arranged on the movable frame;

[0012] The driving hydraulic assembly can push the mobile frame to move along the base.

[0013] Furthermore, slide rails are provided on both sides of the base;

[0014] The bottom of the movable frame on both sides of the movable rotating roller is provided with grooves corresponding to the slide rails, and the movable frame can move along the slide rails;

[0015] The mobile frame is provided with positioning holes for installing positioning pins, the slide rail is provided with mounting holes corresponding to the positioning holes, and the mobile frame is arranged on the slide rail through the positioning pins.

[0016] Furthermore, the driving hydraulic assembly includes two driving hydraulic cylinders, the driving hydraulic cylinders are arranged on a side away from the movable rotating roller, the mounting ends of the driving hydraulic cylinders are arranged on the base, and the output ends of the driving hydraulic cylinders are connected to the movable frame.

[0017] Further, the driving hydraulic assembly includes a pressure pipeline and an oil return pipeline;

[0018] The pressure pipeline is connected with the electromagnetic reversing valve, the A port and the B port of the electromagnetic reversing valve are respectively connected with the double one-way throttle valve through pipelines, the A port of the double one-way throttle valve is connected with the pressure balance valve through a pipeline, and the B port of the double one-way throttle valve is connected with one side of the hydraulic cylinder through a connecting pipeline;

[0019] The pressure balancing valve is communicated with the other side of the hydraulic cylinder through pipelines respectively, and the pressure balancing valve is communicated with the connecting pipeline.

[0020] Furthermore, the electromagnetic reversing valve is a three-position four-way electromagnetic reversing valve;

[0021] The middle position of the electromagnetic reversing valve is Y-shaped, the rod chamber and the rodless chamber of the hydraulic cylinder are connected, and the piston rod of the hydraulic cylinder can move freely.

[0022] Furthermore, when the production line is operating normally, the electromagnetic reversing valve of the hydraulic control system is energized so that the rodless chamber of the hydraulic cylinder is in a full oil state, which can occasionally withstand the maximum tension of the strip in the heat treatment furnace section when the production line is operating normally;

[0023] When the production line stops, the electromagnetic reversing valve of the hydraulic control system is in the middle position, and the middle position of the electromagnetic reversing valve is Y-shaped, so the rod chamber and the rodless chamber of the hydraulic cylinder are connected, the hydraulic cylinder piston rod can move freely, and the moving distance of the movable rotating roller is sufficient to compensate for the cooling shortening length of the aluminum alloy strip from the highest temperature to room temperature.

[0024] Further, a tension meter is included, the tension meter is installed between the movable steering and the movable frame;

[0025] The tension meter is electrically connected to the controller, and the controller is electrically connected to the driving hydraulic assembly.

[0026] Compared with the prior art, the furnace front strip shrinkage compensation device described in the utility model has the following advantages:

[0027] The utility model designs an automatic compensation device for strip shrinkage in front of a furnace of a continuous heat treatment production line for aluminum alloy automobile plates. The device is installed in front of a heat treatment furnace of the continuous heat treatment production line for aluminum alloy automobile plates to achieve the purpose of automatically compensating for the cooling shortening of the strip under any circumstances, thereby completely avoiding accidents caused by the cooling shortening of the strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0029] Figure 1 It is an overall schematic diagram of the furnace front strip shrinkage compensation device according to an embodiment of the utility model;

[0030] Figure 2 This is a schematic diagram of the furnace front strip shrinkage compensation device according to an embodiment of the utility model;

[0031] Figure 3 It is a side schematic diagram of the furnace front strip shrinkage compensation device according to an embodiment of the utility model;

[0032] Figure 4 This is a schematic diagram of the hydraulic control system of the furnace front strip shrinkage compensation device described in an embodiment of the utility model.

[0033] Description of reference numerals:

[0034] 1. Fixed frame; 2. Fixed rotating roller; 3. Mobile frame; 4. Tension meter; 5. Movable rotating roller; 6. Driving hydraulic cylinder; 7. Solenoid reversing valve; 8. Double one-way throttle valve; 9. Pressure balance valve; 10. Heat treatment furnace; 11. Aluminum alloy strip; 12. Automatic compensation device for strip shrinkage; 13. Tension roller in front of the furnace. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0037] like Figures 1 to 4 As shown, the shrinkage compensation device for the strip in front of the furnace is arranged between the heat treatment furnace 10 and the tension roller 13 in front of the furnace. The shrinkage compensation device for the strip in front of the furnace includes a fixed rotating roller 2, a movable rotating roller 5, a base, and a driving hydraulic component; the fixed rotating roller 2 and the movable rotating roller 5 are arranged on the base in sequence, and the driving hydraulic component can push the movable rotating roller 5 to move along the base.

[0038] The fixed rotating roller 2 is set on the base through the fixed frame 1; both ends of the fixed rotating roller 2 are rotatably set on the fixed frame 1, and the fixed rotating roller 2 is set on the side close to the heat treatment furnace 10; both sides of the movable rotating roller 5 are set on the base through the movable frame 3, and both ends of the movable rotating roller 5 are rotatably set on the movable frame 3; the driving hydraulic component can push the movable frame 3 to move along the base.

[0039] Slide rails are provided on both sides of the base; grooves corresponding to the slide rails are provided at the bottom of the mobile frame 3 on both sides of the movable rotating roller 5, and the mobile frame 3 can move along the slide rails; positioning holes for installing positioning pins are installed on the mobile frame 3, and mounting holes corresponding to the positioning holes are provided on the slide rails, and the mobile frame 3 is set on the slide rails through the positioning pins. The driving hydraulic assembly includes two driving hydraulic cylinders 6, which are arranged on the side away from the movable rotating roller 5, and the mounting end of the driving hydraulic cylinder 6 is arranged on the base, and the output end of the driving hydraulic cylinder 6 is connected to the mobile frame 3. The driving hydraulic assembly includes a pressure pipeline and an oil return pipeline; the A port and the B port of the electromagnetic reversing valve 7 are respectively connected to the double one-way throttle valve 8 through pipelines, the A port of the double one-way throttle valve 8 is connected to the pressure balance valve 9 through pipelines, and the B port of the double one-way throttle valve 8 is connected to one side of the hydraulic cylinder through a connecting pipeline; the pressure balance valve 9 is respectively connected to the other side of the hydraulic cylinder through pipelines, and the pressure balance valve 9 is connected to the connecting pipeline; the electromagnetic reversing valve 7 is a three-position four-way electromagnetic reversing valve 7; the middle position of the electromagnetic reversing valve 7 is a Y-type. The rod chamber and the rodless chamber of the hydraulic cylinder are connected, and the piston rod of the hydraulic cylinder can move freely.

[0040] The three-position four-way electromagnetic reversing valve, the double one-way throttle valve 8 and the pressure balance valve 9 all adopt the existing technology.

[0041] When the production line is operating normally, the electromagnetic reversing valve 7 of the hydraulic control system is energized so that the rodless chamber of the hydraulic cylinder is in a full oil state, which can occasionally withstand the maximum tension of the 10-section strip in the heat treatment furnace when the production line is operating normally;

[0042] When the production line stops, the electromagnetic reversing valve 7 of the hydraulic control system is in the middle position, and the middle position of the electromagnetic reversing valve 7 is Y-shaped, so the rod chamber and the rodless chamber of the hydraulic cylinder are connected, the hydraulic cylinder piston rod can move freely, and the moving distance of the movable rotating roller 5 is sufficient to compensate for the cooling shortening length of the aluminum alloy strip 11 from the highest temperature to room temperature.

[0043] It should be noted that this application does not improve the control program. The control programs involved are all existing technologies, and the electrical components involved are also existing technologies.

[0044] It also includes a tension meter 4, which is installed between the movable steering and the movable frame 3; the tension meter 4 is electrically connected to the controller, and the controller is electrically connected to the driving hydraulic component. The tension meter adopts the existing technology.

[0045] The utility model is installed in front of the furnace of the continuous heat treatment production line of aluminum alloy automobile plates. When the production line is operating normally, the movable rotating roller 5 is driven by the hydraulic cylinder to move away from the heat treatment furnace 10 and remain at the farthest distance from the heat treatment furnace 10. At this time, the electromagnetic reversing valve 7 of the hydraulic control system is energized to make the rodless chamber of the hydraulic cylinder always full of pressure oil, which can firmly keep the movable rotating roller 5 at the farthest position from the heat treatment furnace 10 and withstand the maximum tension of the strip in the heat treatment furnace 10 when the production line is operating normally. When the production line stops, the temperature in the heat treatment furnace 10 will gradually drop from the highest 580°C to the room temperature in the workshop. The strip in the heat treatment furnace 10 will cool and shorten as the temperature in the heat treatment furnace 10 decreases. The shortening of the aluminum alloy strip 11 causes the strip tension to increase, and the strip tension will pull the movable rotating roller 5 to move in the direction close to the heat treatment furnace 10. At this time, the electromagnetic reversing valve 7 of the hydraulic control system is in the middle position. Because the middle position of the electromagnetic reversing valve 7 is Y-shaped, the rod chamber and the rodless chamber of the hydraulic cylinder are connected, and the piston rod of the hydraulic cylinder can move freely. It is possible to pull the movable rotating roller 5 toward the heat treatment furnace 10. The moving distance of the movable rotating roller 5 can meet the cooling shortening length of the aluminum alloy strip 11 from the highest temperature to room temperature. At the same time, since the movable rotating roller 5 is equipped with a tension meter 4, the strip tension can be monitored in real time, and participate in the closed-loop control of the strip tension in the heat treatment furnace 10 when the production line is operating normally.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The furnace front strip shrinkage compensation device is characterized by: The furnace front strip material shrinkage compensation device is arranged between the heat treatment furnace and the furnace front tension roller, and the furnace front strip material shrinkage compensation device comprises a fixed rotating roller, a movable rotating roller, a base, and a driving hydraulic assembly; The fixed rotating roller and the movable rotating roller are arranged on the base in sequence, and the driving hydraulic component can push the movable rotating roller to move along the base.

2. The furnace front strip shrinkage compensation device according to claim 1, characterized in that: The fixed rotating roller is arranged on the base through a fixed frame; Both ends of the fixed rotating roller are rotatably arranged on a fixed frame, and the fixed rotating roller is arranged on a side close to the heat treatment furnace; The two sides of the movable rotating roller are arranged on the base through the movable frame, and the two ends of the movable rotating roller are rotatably arranged on the movable frame; The driving hydraulic assembly can push the mobile frame to move along the base.

3. The device for compensating the cold shrinkage of strip in front of the furnace according to claim 2, characterized in that: Slide rails are provided on both sides of the base; The bottom of the movable frame on both sides of the movable rotating roller is provided with grooves corresponding to the slide rails, and the movable frame can move along the slide rails; The mobile frame is provided with positioning holes for installing positioning pins, the slide rail is provided with mounting holes corresponding to the positioning holes, and the mobile frame is arranged on the slide rail through the positioning pins.

4. The device for compensating the cold shrinkage of strip in front of the furnace according to claim 2, characterized in that: The driving hydraulic assembly comprises two driving hydraulic cylinders, which are arranged on a side away from the movable rotating roller, the mounting ends of the driving hydraulic cylinders are arranged on a base, and the output ends of the driving hydraulic cylinders are connected to the movable frame.

5. The device for compensating the cold shrinkage of strip in front of the furnace according to claim 1, characterized in that: The driving hydraulic assembly includes a pressure line and an oil return line; The pressure pipeline is connected with the electromagnetic reversing valve, the A port and the B port of the electromagnetic reversing valve are respectively connected with the double one-way throttle valve through pipelines, the A port of the double one-way throttle valve is connected with the pressure balance valve through a pipeline, and the B port of the double one-way throttle valve is connected with one side of the hydraulic cylinder through a connecting pipeline; The pressure balancing valve is communicated with the other side of the hydraulic cylinder through pipelines respectively, and the pressure balancing valve is communicated with the connecting pipeline.

6. The device for compensating the cold shrinkage of strip in front of the furnace according to claim 5, characterized in that: The electromagnetic reversing valve is a three-position four-way electromagnetic reversing valve; The middle position of the solenoid reversing valve is Y-type.

7. The device for compensating the cold shrinkage of strip in front of the furnace according to claim 1, characterized in that: Also included is a tension meter, the tension meter being mounted between the movable steering and the moving frame; The tension meter is electrically connected to the controller, and the controller is electrically connected to the driving hydraulic assembly.

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