A hydraulic load balancing device for a slab continuous casting vibrating table

Abstract

The application discloses a slab continuous casting vibrating table hydraulic load balancing device and belongs to the technical field of continuous casting equipment. The device comprises a vibrating table fixed frame, a movable frame, a crystallizer, a guide component and a driving component, and further comprises a plurality of soft connections arranged between the fixed frame and the movable frame. Cooling water enters the soft connections through pipelines and is then delivered to the crystallizer, and then flows into the remaining soft connections through the pipelines and is finally discharged through the pipelines. When the pressurized cooling water is introduced, the water pressure acts on the bottom of the movable frame to generate an upward thrust, effectively offsetting the gravity load of the crystallizer and the movable frame. The application integrates the cooling water delivery and the gravity balancing function in one, greatly reduces the load of the driving component, and the driving force is only one fourth of that without the balancing device, thereby significantly reducing the energy consumption, simplifying the structure, and improving the stability and reliability of the equipment operation.

Description

Technical Field

[0001] This invention relates to the field of continuous casting equipment technology, specifically to a hydraulic load balancing device for a slab continuous casting vibration table. Background Technology

[0002] In continuous casting production, the crystallizer vibration table is a key piece of equipment, serving to remove the slab from the mold and prevent the initial billet shell from sticking to the crystallizer and cracking. Domestic crystallizer vibration devices are mainly classified into electric and hydraulic drives. With the advancement of iron and steel metallurgical technology, online crystallizer width adjustment devices, electromagnetic crystallizer stirring and braking devices have been put into production applications. Consequently, the size and weight of the crystallizer have increased significantly. Therefore, a greater driving force is needed to drive the vibration table to complete the vibration.

[0003] To reduce the weight and size of the mechanism, lower the drive power, and achieve low-energy operation, both systems employ balancing devices to offset part of the load. Currently, cylinders or springs (coil, gas, leaf springs) are used as balancing devices. Regardless of the type of load balancing device used, the number of components in the vibration table increases, as does the workload of equipment maintenance.

[0004] To simplify the structure of the vibration table, reduce the driving force, decrease the number of components and maintenance workload, and improve equipment reliability, it is proposed to use the cooling water pressure through the internal pipes of the vibration table body to balance the load. Summary of the Invention

[0005] The purpose of this invention is to provide a hydraulic load balancing device for a slab continuous casting vibration table to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hydraulic load balancing device for a slab continuous casting vibrating table, comprising a fixed frame of the vibrating table, a movable frame of the vibrating table, a crystallizer, a guide component, and a drive component; the movable frame of the vibrating table is connected to the fixed frame of the vibrating table through the guide component, the crystallizer is installed on the movable frame of the vibrating table, the drive component is used to drive the movable frame of the vibrating table to reciprocate, at least one flexible connection is provided between the fixed frame of the vibrating table and the movable frame of the vibrating table, cooling water enters the internal cavity of the flexible connection through a pipe, and is then transported to the top crystallizer through a pipe, then flows into the remaining flexible connections through a pipe, and finally is discharged through a pipe; when cooling water is introduced into the internal cavity of the flexible connection, the cooling water pressure acts on the bottom of the movable frame of the vibrating table to reduce or balance the gravitational load of the crystallizer and the movable frame of the vibrating table.

[0007] Preferably, the flexible connection is a rubber cylinder structure, with both ends of the rubber cylinder being fixedly connected to the fixed frame of the vibration table and the movable frame of the vibration table, respectively, and the side wall of the rubber cylinder being connected to the pipeline.

[0008] Preferably, the area of ​​the movable frame of the vibration table wrapped by the rubber cylinder is the pressure-bearing area. The area of ​​the pressure-bearing area is determined according to the total weight of the crystallizer and the movable frame of the vibration table and the cooling water pressure, so that the generated upward thrust can reduce or balance the gravity load.

[0009] Preferably, the guiding component is a guide leaf spring or a guide link.

[0010] Preferably, the driving component is a driving link, and the top of the driving link is hinged to the bottom of the movable frame of the vibration table.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. Significantly reduces drive energy consumption and greatly reduces the load on drive components.

[0013] This invention cleverly utilizes the pressure of cooling water to create a pressure-bearing area inside the flexible connection, converting the water pressure into an upward thrust acting on the bottom of the moving frame of the vibration table. This thrust can effectively counteract most, or even all, of the gravitational load on the crystallizer and the moving frame of the vibration table. Actual operating condition calculations show that with this device, the driving force required to overcome during vibration is only the dynamic inertial force and the crystallizer's demolding friction, with the driving force being only about 1 / 4 of that without a balancing device. This significantly reduces the power requirements of the driving components, achieving low-energy consumption and high-efficiency operation.

[0014] 2. The highly integrated structure simplifies the overall construction of the vibration table. This invention eliminates the need for additional complex balancing mechanisms such as spring counterweights, cylinders, or hydraulic cylinders. Instead, it directly combines the cooling water delivery pipeline with the load balancing function, allowing the flexible connection to function as both a cooling water delivery channel and a gravity balancing component. This multi-functional design effectively reduces the number of parts on the vibration table, lowers the overall weight of the equipment, and makes the vibration table structure more compact, facilitating installation and maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the shaking table structure;

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0017] In the diagram: 1. Fixed frame of the vibration table; 2. Movable frame of the vibration table; 3. Crystallizer; 4. Cooling water channel; 5. Flexible connection; 6. Drive linkage; 7. Pressure bearing area. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figure 1 This invention provides a hydraulic load balancing device for a slab continuous casting vibrating table, comprising a fixed frame 1, a movable frame 2, a crystallizer 3, a guide component, and a drive component 6. The movable frame 2 is connected to the fixed frame 1 via the guide component; in this embodiment, the guide component preferably employs a guide leaf spring or a guide rod. The crystallizer 3 is mounted on the movable frame 2. The drive component 6 is a drive rod, its top hinged to the bottom of the movable frame 2, used to drive the movable frame 2 to reciprocate.

[0020] The core of this invention lies in the flexible connection 5 installed between the fixed frame 1 and the movable frame 2 of the vibration table. Cooling water enters the internal area of ​​the flexible connection 5 through the bottom pipe 4, and then is transported to the crystallizer 3 through the top pipe 4. Next, the cooling water flows from the pipe 4 into the other flexible connections 5, and finally flows out from the pipe 4, realizing the input and output of cooling water.

[0021] like Figure 2 As shown, the flexible connection 5 is preferably a rubber cylinder structure. Both ends of the rubber cylinder are fixedly connected to the fixed frame 1 and the movable frame 2 of the vibrating table, respectively. The side wall of the rubber cylinder is connected to the pipe 4. The area of ​​the movable frame 2 of the vibrating table enclosed by the rubber cylinder is the pressure-bearing area 7. The area of ​​the pressure-bearing area 7 is determined based on the total weight of the crystallizer 3 and the movable frame 2 of the vibrating table, as well as the cooling water pressure, so that the generated upward thrust can reduce or balance the gravitational load. Before the continuous casting machine starts casting, the cooling water fills the pressure-bearing area 7. At this time, the pressure generated by the pressurized cooling water acts on the pressure-bearing area 7 of the movable frame 2 of the vibrating table, generating an upward force. This upward force effectively reduces or balances the gravitational load of the crystallizer 3 and the movable frame 2 of the vibrating table. During the transportation of the cooling water, the circumferential force causes the rubber cylinder to expand, while the vertical force acts on the movable frame 2 and the fixed frame 1 of the vibrating table, respectively.

[0022] In practical applications, the inner diameter of the flexible connection 5, i.e. the rubber cylinder, can be reasonably calculated and selected based on the total weight of the crystallizer 3 and the moving frame 2 of the vibration table, as well as the cooling water pressure, so that the upward thrust generated by the flexible connection 5 is equal to the total weight, thereby achieving the purpose of completely balancing the load.

[0023] Calculation data for specific embodiments:

[0024] Taking a 230×2150mm cross-section slab continuous casting machine as an example, the crystallizer is 900mm long and weighs approximately 28 tons, while the moving frame of the vibrating table weighs approximately 4 tons, for a total weight of 32 tons for the entire moving part. Under this condition, the amplitude is ±6mm and the frequency is 180 times / minute (3Hz). Without a balancing device, the required driving force is calculated as follows: F 驱动力 =F 重力 +F 动载 +F 结晶器脱模阻力 (1)

[0025] Among them, F 重力 =m×g=32000×9.8=313.6kN; (1-1)

[0026] F 动载 =m×a (1-2)

[0027] a = ω² × D × 10 - ³, where ω = 2πf

[0028] 'a' represents acceleration, measured in g (gravitational acceleration), where 1g = 9.8 m / s². Therefore:

[0029] a≈f 2 ×D×0.0392(m / s²)

[0030] f is the frequency = 3Hz

[0031] D is the displacement (single peak value 0–P) = 0.006m

[0032] m represents the total weight = 32000 (kg)

[0033] F 动载 =m×(2πf)²×D×10 - ³

[0034] =32000×(6π)²×0.006

[0035] ≈68150N

[0036] ≈68.2kN;

[0037] F 结晶器脱模阻力 =0.5ρgLh2μ (1-3)

[0038] ρ is the density of molten steel, 0.007 kg / cm³. 3

[0039] G is the acceleration due to gravity, 9.8 m / s²

[0040] L is the circumference of the crystallizer, in cm.

[0041] h represents the effective length of the crystallizer, which is 90cm.

[0042] μ is the coefficient of friction between the billet and the crystallizer, taken as 0.3.

[0043] F 结晶器脱模阻力 =0.5*0.007kg / cm 3 *9.8m / s²* (23*2+2150*2)*90 2 *0.3

[0044] =39674.124N

[0045] ≈39.7kN

[0046] F 驱动力 =F 重力 +F 动载 +F 结晶器脱模阻力

[0047] =313.6 + 68.2 + 39.7

[0048] =421.5kN

[0049] Driving force after using a balancing device:

[0050] F 驱动力 =F 动载 +F 结晶器脱模阻力

[0051] =107.9kN

[0052] As can be seen from the above data, after adopting the present invention, the driving force is only about 1 / 4 of that without a load balancing device, which greatly reduces the load on the driving device and achieves low-energy operation. At the same time, the present invention does not require additional balancing devices such as springs or cylinders. The flexible connection 5 serves as a cooling water supply channel while also balancing gravity, simplifying the vibration table structure, reducing the number of parts, significantly reducing equipment maintenance workload, and improving equipment reliability.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic load balancing device for a slab continuous casting vibrating table, comprising a fixed frame (1) of the vibrating table, a movable frame (2) of the vibrating table, a crystallizer (3), a guide component, and a driving component (6); wherein the movable frame (2) of the vibrating table is connected to the fixed frame (1) of the vibrating table via the guide component, the crystallizer (3) is mounted on the movable frame (2) of the vibrating table, and the driving component (6) is used to drive the movable frame (2) of the vibrating table to reciprocate, characterized in that, Multiple flexible connections (5) are provided between the fixed frame (1) of the vibration table and the movable frame (2) of the vibration table. Cooling water enters the internal cavity of the flexible connection (5) through the pipe (4), and is then transported to the crystallizer (3) at the top through the pipe (4). After that, it flows into the remaining flexible connections (5) through the pipe (4) and is finally discharged through the pipe (4). When cooling water is introduced into the internal cavity of the flexible connection (5), the cooling water pressure acts on the bottom of the movable frame (2) of the vibration table to reduce or balance the gravity load of the crystallizer (3) and the movable frame (2) of the vibration table.

2. The hydraulic load balancing device for a slab continuous casting vibrating table according to claim 1, characterized in that, The flexible connection (5) is a rubber cylinder structure. The two ends of the rubber cylinder are fixedly connected to the fixed frame (1) and the movable frame (2) of the vibration table, respectively. The side wall of the rubber cylinder is connected to the pipe (4).

3. The hydraulic load balancing device for the slab continuous casting vibrating table according to claim 2, characterized in that, The area of ​​the movable frame (2) of the vibration table wrapped by the rubber cylinder is the pressure-bearing area (7). The area of ​​the pressure-bearing area (7) is determined according to the total weight of the crystallizer (3) and the movable frame (2) of the vibration table and the cooling water pressure, so that the generated upward thrust can reduce or balance the gravity load.

4. The hydraulic load balancing device for the slab continuous casting vibrating table according to claim 1, characterized in that: The guiding component is a guide leaf spring or a guide connecting rod.

5. The hydraulic load balancing device for the slab continuous casting vibrating table according to claim 1, characterized in that: The driving component is a driving link (6), the top of which is hinged to the bottom of the moving frame (2) of the vibration table.

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