Continuous casting stepping steel billet overturning cooling bed steel pushing device and method

Abstract

The invention relates to the technical field of steel billet production, in particular to a continuous casting stepping steel billet turnover cooling bed steel pushing device and method, which comprises a concrete base, a static beam system and a movable beam system, the static beam system comprises a plurality of static toothed plates; the movable beam system comprises a movable frame, a plurality of movable toothed plates and a driving hydraulic cylinder assembly; the first tooth profile on the static toothed plate and the second tooth profile on the movable toothed plate are obliquely arranged in opposite directions; the driving hydraulic cylinder assembly comprises at least two sets of lifting hydraulic cylinders and at least one set of transverse moving hydraulic cylinders, displacement compensation hydraulic cylinders are arranged at the driving ends of the lifting hydraulic cylinders and the driving ends of the transverse moving hydraulic cylinders, and external displacement sensors are arranged on the transverse moving hydraulic cylinders and the lifting hydraulic cylinders. Through cooperative use of the displacement sensor and the displacement compensation hydraulic cylinder, the problems of asynchronous driving and inconsistent strokes of the lifting hydraulic cylinder are effectively solved, the levelness of the supporting surface of the movable toothed plate is ensured, the risks of inclination and falling of stacked billets are reduced, and the operation efficiency and safety of the continuous casting machine cooling bed are improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel billet production, and in particular to a continuous casting step steel billet turning cooling bed steel pushing device and method. Background Art

[0002] The billets produced by the 6-meter arc billet continuous casting machine are cooled and straightened on the cooling bed, and then discharged and stacked. The existing walking cooling bed consists of a fixed frame and a movable frame. The movable frame is driven by a transverse mechanism and a lifting mechanism to achieve the flipping and cooling of the continuous casting billets.

[0003] However, since the movable frame mainly relies on multiple lifting mechanisms for lifting and lowering drive, and multiple lifting mechanisms have uncertainties in initial response time and stroke control, these problems may cause the bearing surface on the movable frame used to bear the steel billets to tilt. The inclination of the bearing surface not only affects the orderly arrangement of the steel billets, but also may cause the steel billets to fall during the lateral movement of the movable frame, thereby posing a safety hazard. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a continuous casting step-by-step billet turning cooling bed steel pushing device and method, which effectively solves the problems in the background technology.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: a continuous casting step-by-step billet turning cooling bed steel pushing device, comprising: a concrete base, and a static beam system and a dynamic beam system arranged on the concrete base; The static beam system includes a plurality of static tooth plates arranged perpendicular to the stepping direction; The movable beam system includes a movable frame, a plurality of movable tooth plates arranged on the movable frame and arranged alternately and parallel to the plurality of stationary tooth plates, and a driving hydraulic cylinder assembly supporting and driving the movable frame to perform stepping motion; Wherein, the first tooth shape on the stationary tooth plate and the second tooth shape on the movable tooth plate are inclined in opposite directions; The driving hydraulic cylinder assembly includes at least two groups of lifting hydraulic cylinders and at least one group of lateral hydraulic cylinders, a displacement compensation hydraulic cylinder is provided at the driving end of the lifting hydraulic cylinder and the lateral hydraulic cylinder, and an external displacement sensor is provided on the lateral hydraulic cylinder and the lifting hydraulic cylinder; During stepping, the two groups of lifting hydraulic cylinders drive the mobile frame to rise, and work together with the transverse hydraulic cylinder to make the several movable tooth plates and the several static tooth plates alternately support the steel billet to form a stepping action; and when the second tooth shape rises to a position close to the first tooth shape, the controller receives the lifting distance signals of the two groups of lifting hydraulic cylinders sensed by the external displacement sensor, and controls the displacement compensation hydraulic cylinder to compensate for the lifting distance.

[0006] Furthermore, the stationary gear plate and the movable gear plate are arranged in sections along the length direction; The ends of two adjacent stationary gear plates or two adjacent movable gear plates are overlapped, and a support seat is arranged at the overlapped position.

[0007] Furthermore, the distances between two adjacent tooth height points of the first tooth shape and the second tooth shape are equal; The first tooth shape includes a first plane rib and a first arc rib arranged at an angle with the first plane rib, and the first plane rib is arranged obliquely along the stepping direction, and the first arc rib is arranged convexly along the stepping direction; The second tooth shape includes a second plane rib and a second arc rib arranged at an angle with the second plane rib, and the second plane rib is inclined in the opposite direction of stepping, while the second arc rib is convex in the opposite direction of stepping.

[0008] Furthermore, a vertical distance from a tooth high point to a tooth low point of the second tooth shape is greater than a vertical distance from a tooth high point to a tooth low point of the first tooth shape.

[0009] Furthermore, two adjacent first tooth shapes on the stationary tooth plate form a fixed placement groove at the tooth low point; Two adjacent second tooth shapes on the movable tooth plate form a movable placement groove at the tooth low point, and the opening angle of the movable placement groove is smaller than the opening angle of the fixed placement groove; When the movable tooth plate rises, the tooth low point of the movable placement groove and the tooth low point of the fixed placement groove are located on the same vertical line, and the second curved rib drives the steel billet to flip and positions the steel billet together with the first curved rib.

[0010] Furthermore, when the movable tooth plate performs a stepping motion relative to the stationary tooth plate, a no-load state, a transport state and a load state are formed; When the second tooth shape is lower than the first tooth shape, it is in an unloaded state, and the lifting hydraulic cylinder works together with the displacement compensation hydraulic cylinder and cooperates with the lateral hydraulic cylinder to enable the moving frame to quickly move from the end position of the step to the starting position; When the second tooth shape overlaps with the first tooth shape, the steel billet is in a transfer state. The displacement compensation hydraulic cylinder acts on the moving frame, and the moving frame slowly moves to transfer the steel billet on the stationary tooth plate to the movable tooth plate. When the second tooth shape is higher than the first tooth shape, it is in a load state. The lifting hydraulic cylinder acts on the moving frame and cooperates with the transverse hydraulic cylinder to drive the moving frame so that the movable tooth plate moves the steel billet from the starting position of the step to the end position at a uniform speed.

[0011] Furthermore, the two groups of lifting hydraulic cylinders are arranged in the vertical direction and below the moving frame in the stepping direction; One group of the lateral hydraulic cylinders is located between the two groups of the lifting hydraulic cylinders and is arranged in the horizontal direction; Wherein, both ends of the lifting hydraulic cylinder and the lateral hydraulic cylinder are provided with hinge joints.

[0012] Further, the displacement compensation hydraulic cylinder includes a cylinder body, a cylinder cover arranged at one end of the cylinder body facing the lifting hydraulic cylinder, and a piston rod arranged in the cylinder body; The rod body of the piston rod extends out of the cylinder cover and is connected to the rod body of the lifting hydraulic cylinder, and one end of the cylinder body away from the cylinder cover is connected to the hinge joint; Wherein, the piston rod is provided with a first step surface at the center of the end surface of the rodless oil chamber, and the cylinder body is provided with a second step surface on the surface opposite to the first step surface, and when the first step surface contacts the second step surface, an annular oil inlet chamber is formed at the outer edge; A first oil circuit is provided at a position of the cylinder body corresponding to the annular oil inlet cavity, and a second oil circuit is provided on the cylinder cover.

[0013] Furthermore, the piston head corresponding to the piston rod of the displacement compensation hydraulic cylinder is located in the middle position of the cylinder body; A pressure sensing component is arranged on the contact surface between the concrete base and the mobile frame corresponding to each supporting point, and the pressure sensing component includes a force-bearing block and a pressure sensor arranged between the force-bearing block and the concrete base; The force-bearing block has a first protrusion and a second protrusion on one side facing the pressure sensor, the first protrusion contacts the pressure sensor, an elastic member is provided between the second protrusion and the concrete base, and a limiting step surface is provided at the end position of the second protrusion.

[0014] The present invention also provides a continuous casting step-by-step steel billet turning cooling bed steel pushing method, which is applied to the continuous casting step-by-step steel billet turning cooling bed steel pushing device as described above, and comprises the following steps: Start the driving hydraulic cylinder assembly, and the two sets of lifting hydraulic cylinders start working to drive the mobile frame to rise. At the same time, the horizontal hydraulic cylinder moves forward and backward as needed to move the mobile frame in the vertical direction; Start the displacement compensation hydraulic cylinder. The controller controls the displacement compensation hydraulic cylinder to fine-tune the lifting distance according to the lifting distance signals of the two groups of lifting hydraulic cylinders sensed by the external displacement sensor, until the movable gear plate rises above the static rack. At this time, the movable gear plate supports the steel billet. The traverse hydraulic cylinder starts to move, and the lifting hydraulic cylinder moves up and down as needed to drive the moving frame to move forward to the stepping end position; The lifting hydraulic cylinder is switched to move, and the lateral hydraulic cylinder moves forward and backward as needed, so that the movable frame descends in the vertical direction until the movable gear plate descends below the static gear plate, at which time the static gear plate supports the billet; The lateral hydraulic cylinder moves again, and at the same time the lifting hydraulic cylinder moves up and down as needed, driving the moving frame to move backward to the initial stepping position; Repeat the above-mentioned stepping action, and the movable tooth plate and the stationary tooth plate alternately support the steel billet until the steel billet is pushed to the predetermined position.

[0015] The beneficial effects of the present invention are as follows: the present invention can effectively solve the problems of asynchronous driving and inconsistent stroke of the lifting hydraulic cylinder through the coordinated use of the displacement sensor and the displacement compensation hydraulic cylinder, ensure the horizontality of the supporting surface of the moving tooth plate, reduce the risk of tilting and falling of the billet stack, and improve the operating efficiency and safety of the continuous casting machine cooling bed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the stationary tooth plate supporting the steel billet in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the movable gear plate supporting the steel billet in an embodiment of the present invention; Figure 3 It is a schematic diagram of the stepping process of the steel pushing device of the cooling bed in the embodiment of the present invention; Figure 4 It is a schematic diagram of positioning the first curved rib and the second curved rib on the steel billet in an embodiment of the present invention; Figure 5 It is a schematic diagram of the positions of the movable gear plate in an unloaded state, a transport state and a loaded state according to an embodiment of the present invention; Figure 6 It is a schematic diagram of the first state structure of the displacement compensation hydraulic cylinder in an embodiment of the present invention; Figure 7 A schematic diagram of the second state structure of the displacement compensation hydraulic cylinder in an embodiment of the present invention; Figure 8 for Figure 1 A partial enlarged view of point A.

[0018] Figure numerals: 1. concrete base; 2. static beam system; 21. static tooth plate; 211. first tooth shape; 211a. first plane rib; 211b. first arc rib; 211c. fixed placement slot; 3. dynamic beam system; 3A. no-load state; 3B. transport state; 3C. load state; 31. mobile frame; 32. dynamic tooth plate; 321. second tooth shape; 321a. second plane rib; 321b. second arc rib; 321c. movable placement slot; 33. lifting hydraulic cylinder; 34. transverse hydraulic cylinder; 4. displacement compensation hydraulic cylinder; 4a. annular oil inlet chamber; 4b. first oil circuit; 4c. second oil circuit; 41. cylinder body; 411. second step surface; 42. cylinder head; 43. piston rod; 431. first step surface; 5. support seat; 6. pressure sensing component; 61. force block; 62. elastic member; 63. pressure sensor. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] like Figures 1 to 3 The continuous casting step-by-step billet turning cooling bed steel pushing device shown comprises a concrete base 1, and a static beam system 2 and a dynamic beam system 3 arranged on the concrete base 1; The static beam system 2 includes a plurality of static tooth plates 21 arranged perpendicular to the stepping direction; the dynamic beam system 3 includes a moving frame 31, a plurality of dynamic tooth plates 32 arranged on the moving frame 31 and arranged alternately and parallel to the plurality of static tooth plates 21, and a driving hydraulic cylinder assembly supporting and driving the moving frame 31 to perform a stepping motion; The first tooth shape 211 on the stationary tooth plate 21 and the second tooth shape 321 on the movable tooth plate 32 are tilted in opposite directions; the driving hydraulic cylinder assembly includes at least two groups of lifting hydraulic cylinders 33 and at least one group of lateral hydraulic cylinders 34, and a displacement compensation hydraulic cylinder 4 is provided at the driving end of each of the lifting hydraulic cylinders 33 and the lateral hydraulic cylinder 34, and an external displacement sensor (not shown in the figure) is provided on each of the lateral hydraulic cylinders 34 and the lifting hydraulic cylinder 33; During stepping, the two sets of lifting hydraulic cylinders 33 drive the mobile frame 31 to rise, and work together with the transverse hydraulic cylinder 34 to make a number of movable tooth plates 32 and a number of stationary tooth plates 21 alternately support the steel billet to form a stepping action; and when the second tooth shape 321 rises to a position close to the first tooth shape 211, the controller receives the lifting distance signal of the two sets of lifting hydraulic cylinders 33 sensed by the external displacement sensor, and controls the displacement compensation hydraulic cylinder 4 to compensate for the lifting distance.

[0023] In the present invention, a sunken foundation pit is set in the concrete base 1, and the static beam system 2 is arranged on the columns of the foundation pit, and the movable beam system 3 is floatingly erected above the foundation pit. Specifically, the mobile frame 31 is erected above the foundation pit through the opening groove of the column, one end of the lifting hydraulic cylinder 33 is installed at the bottom of the foundation pit through embedded parts, and the other end is connected to the mobile frame 31, which is used to drive the mobile frame 31 to lift and lower, and the transverse hydraulic cylinder 34 is arranged on one side of the foundation pit column through embedded parts, which is used to drive the mobile frame 31 to move along the stepping direction. During the specific implementation process, the lifting hydraulic cylinder 33 and the displacement compensation hydraulic cylinder 4 control the lifting height of the mobile frame 31 to ensure the horizontality of the supporting surface where the mobile frame 31 is located; and the transverse hydraulic cylinder 34 and the displacement compensation hydraulic cylinder 4 control the corresponding positions of the second tooth shape 321 on the movable gear plate 32 and the first tooth shape 211 on the static gear plate 21. If the absolute value of the difference between the extension displacements of the piston rods 43 of the two transverse hydraulic cylinders 34 is greater than or equal to the set threshold, the control system controls the displacement compensation hydraulic cylinder 4 to start moving to ensure that the difference in the extension displacements of the piston rod 43 is less than the set threshold.

[0024] By using the displacement sensor and the displacement compensation hydraulic cylinder 4 in combination, the problems of asynchronous driving and inconsistent stroke of the lifting hydraulic cylinder 33 can be effectively solved, the horizontality of the supporting surface of the movable tooth plate 32 can be ensured, the risk of tilting and falling of the billet stack can be reduced, and the operating efficiency and safety of the continuous casting machine cooling bed can be improved.

[0025] In the present invention, the stationary tooth plate 21 and the movable tooth plate 32 are arranged in sections along the length direction, which reduces the difficulty of processing. The tooth plates of different sections can be customized according to different process requirements to adapt to different working environments and load conditions, and each tooth segment can be interchanged, which improves practicality, and the ends of two adjacent stationary tooth plates 21 or two adjacent movable tooth plates 32 are overlapped, and a support seat 5 is arranged at the overlapped position. The design of overlapping ends enhances the connection rigidity between the tooth plates, and the support seat 5 shares the force received by the tooth plates during movement, reduces the stress concentration of a single tooth plate, and prolongs the service life of the tooth plates.

[0026] In the preferred embodiment, the distance between the two adjacent tooth height points of the first tooth shape 211 and the second tooth shape 321 is equal, which can ensure the synchronization and accuracy during the transmission process. The first tooth shape 211 includes a first plane rib 211a and a first arc rib 211b arranged at an angle to the first plane rib 211a, and the first plane rib 211a is inclined along the stepping direction, while the first arc rib 211b is convex along the stepping direction; the second tooth shape 321 includes a second plane rib 321a and a second arc rib 321b arranged at an angle to the second plane rib 321a, and the second plane rib 321a is inclined along the opposite direction of stepping, while the second arc rib 321b is convex along the opposite direction of stepping.

[0027] The first planar rib 211a and the second planar rib 321a can allow the steel billet to stop at a specified inclined position, while the first curved rib 211b and the second curved rib 321b can flip the steel billet during the lifting and lowering process of the movable rack, and the curvature controls the flipping of the steel billet to be more uniform, making the transmission process smoother, reducing the impact and vibration between teeth, and thus significantly reducing the operating noise.

[0028] On the basis of the above solution, the vertical distance from the tooth high point to the tooth low point of the second tooth shape 321 is greater than the vertical distance from the tooth high point to the tooth low point of the first tooth shape 211 .

[0029] The tooth height point of the first tooth shape 211 is set lower, which can reduce the vertical movement distance required by the movable tooth plate 32 during the lifting process, and the tooth height point of the second tooth shape 321 is set higher than the tooth height point of the first tooth shape 211, ensuring the stability of the steel billet in the tooth groove during the lateral movement of the movable tooth plate 32, reducing the vibration and displacement of the steel billet during the movement, and improving the overall stability and safety.

[0030] As a preferred embodiment of the above scheme, two adjacent first tooth shapes 211 on the stationary tooth plate 21 form a fixed placement groove 211c at the tooth low point; two adjacent second tooth shapes 321 on the movable tooth plate 32 form a movable placement groove 321c at the tooth low point, and the opening angle of the movable placement groove 321c is smaller than the opening angle of the fixed placement groove 211c; like Figure 4 As shown, when the movable tooth plate 32 rises, the tooth low point of the movable placement groove 321c and the tooth low point of the fixed placement groove 211c are located on the same vertical line, and the second curved rib 321b drives the billet to flip and positions the billet together with the first curved rib 211b. The first curved rib and the second curved rib can straighten the billet and make the billet fall smoothly onto the second flat rib 321a, ensuring that the billet will not be displaced or fall off during the straightening and moving process, thereby improving the accuracy and efficiency of billet processing.

[0031] In a preferred embodiment of the present invention, Figure 5 As shown, when the movable tooth plate 32 performs a stepping motion relative to the stationary tooth plate 21, an unloaded state 3A, a transport state 3B and a loaded state 3C are formed; When the second tooth shape 321 is lower than the first tooth shape 211, it is in the no-load state 3A, and the lifting hydraulic cylinder 33 and the displacement compensation hydraulic cylinder 4 work together and cooperate with the traverse hydraulic cylinder 34 to enable the moving frame 31 to move quickly from the end position of the step to the starting position; When the second tooth shape 321 overlaps with the first tooth shape 211, it is in the transfer state 3B, and the displacement compensation hydraulic cylinder 4 acts on the moving frame 31, and the moving frame 31 slowly moves to transfer the steel billet on the stationary tooth plate 21 to the movable tooth plate 32; When the second tooth shape 321 is higher than the first tooth shape 211, it is in load state 3C. The lifting hydraulic cylinder 33 acts on the moving frame 31 and cooperates with the transverse hydraulic cylinder 34 to drive the moving frame 31 so that the movable tooth plate 32 moves the steel billet from the starting position of the step to the end position at a uniform speed.

[0032] The stepping motion is divided into multi-stage speed control, so that the moving frame 31 adopts different speeds in different working states. Specifically, the moving speed in the no-load state 3A is greater than the moving speed in the loaded state 3C, and the moving speed in the loaded state 3C is greater than the moving speed in the transfer state 3B. Fast movement in the no-load state 3A can reduce non-production time and improve overall operating efficiency; slow movement in the transfer state 3B helps to accurately control the transfer process of the steel billet, ensuring that the steel billet moves smoothly and accurately from the stationary tooth plate 21 to the movable tooth plate 32; slow movement in the loaded state 3C can reduce the impact on the equipment and the steel billet, reduce the risk of wear and damage, and extend the service life of the equipment.

[0033] In the present invention, two groups of lifting hydraulic cylinders 33 are arranged in the vertical direction and below the moving frame 31 in the stepping direction; a group of transverse hydraulic cylinders 34 is located between the two groups of lifting hydraulic cylinders 33 and is arranged in the horizontal direction, and both ends of the lifting hydraulic cylinders 33 and the transverse hydraulic cylinders 34 are provided with hinge joints.

[0034] Specifically, two lifting hydraulic cylinders 33 form a group, and the two groups of lifting hydraulic cylinders 33 are arranged along the stepping direction, and a group of transverse hydraulic cylinders 34 is arranged between the two groups of lifting hydraulic cylinders 33. This combination ensures the stability of the mobile frame 31 in the vertical and horizontal directions; and the use of the hinged joint allows the hydraulic cylinders to freely extend and retract within their respective motion planes, providing flexible mobility and reducing mechanical interference, so that the mobile frame 31 can perform stepping movements smoothly.

[0035] In a preferred embodiment of the present invention, Figure 6 As shown, the displacement compensation hydraulic cylinder 4 includes a cylinder body 41, a cylinder cover 42 arranged at one end of the cylinder body 41 facing the lifting hydraulic cylinder 33, and a piston rod 43 arranged in the cylinder body 41; the rod body of the piston rod 43 extends out of the cylinder cover 42 and is connected to the rod body of the lifting hydraulic cylinder 33, and the end of the cylinder body 41 away from the cylinder cover 42 is connected to the hinge joint; Among them, the piston rod 43 is provided with a first step surface 431 at the center position of the end face of the rodless oil chamber, and the cylinder body 41 is provided with a second step surface 411 on the opposite side of the first step surface 431. When the first step surface 431 contacts the second step surface 411, an annular oil inlet chamber 4a is formed at the outer edge; the cylinder body 41 is provided with a first oil circuit 4b at the position corresponding to the annular oil inlet chamber 4a, and a second oil circuit 4c is provided on the cylinder head 42. It should be noted that a threaded hole is provided at the center position of the end of the piston rod 43, and a screw is provided at the center position of the end face of the cylinder body 41. The cylinder body 41 of the lifting hydraulic cylinder 33 is connected to the threaded hole, and the hinge joint is connected to the screw, which is convenient for later replacement and improves the installation convenience of the displacement compensation hydraulic cylinder 4. In addition, a sealing structure is provided on the piston rod 43, the cylinder body 41 and the cylinder head 42 to ensure the normal operation of the hydraulic cylinder. The sealing structure provided in the hydraulic cylinder is an existing structure and will not be repeated here.

[0036] When the cooling bed starts to push the steel step by step, the lifting hydraulic cylinder 33 drives the moving frame 31 to start rising. At this time, the displacement compensation hydraulic cylinder 4 is in the initial position, that is, the first step surface 431 is in contact with the second step surface 411; as the moving frame 31 continues to rise, the external displacement sensor detects the rising height of the corresponding support point of the moving frame 31 in real time; when the rising height of a certain support point is lower than the height of the highest support point, and the difference between the rising heights of the two is greater than the set threshold, the displacement compensation hydraulic cylinder 4 starts to act, and the hydraulic oil enters the rodless oil chamber through the first oil circuit 4b, and the cylinder body 41 moves in the direction away from the lifting hydraulic cylinder 33 under the oil pressure of the hydraulic oil to compensate for the extension stroke of the lifting hydraulic cylinder 33. In the present invention, the lifting hydraulic cylinder 33 with different strokes is compensated by the displacement compensation hydraulic cylinder 4 to ensure the horizontality of the moving frame 31, further ensure the horizontality of the support surface of the movable gear plate 32, and ensure the smooth transportation of the steel billet, and the annular oil inlet cavity 4a formed on the outer edge improves the response speed of the oil circuit.

[0037] In the present invention, since the stroke of the displacement compensation hydraulic cylinder 4 is limited, it is impossible to achieve compensation for a large gap. Therefore, in the preferred embodiment, Figure 7-8 As shown, the piston head corresponding to the piston rod 43 of the displacement compensating hydraulic cylinder 4 is located in the middle position of the cylinder body 41; in addition, since the external displacement sensor can only detect the height change after the lifting hydraulic cylinder 33 moves to a certain height, its detection ability of the displacement change in the early stage is limited. Therefore, in order to speed up the response speed of the displacement compensating hydraulic cylinder, a pressure sensing component 6 is set on the contact surface between the concrete base 1 and the mobile frame 31 corresponding to each supporting point, and the pressure sensing component 6 includes a force block 61 and a pressure sensor 63 arranged between the force block 61 and the concrete base 1; wherein, a first protrusion and a second protrusion are provided on a side of the force block 61 facing the pressure sensor 63, the first protrusion is in contact with the pressure sensor 63, an elastic member 62 is provided between the second protrusion and the concrete base 1, and a limiting step surface is provided at the end position of the second protrusion.

[0038] In the initial state of the cooling bed, the mobile frame 31 is placed on the concrete base 1, and the limiting step surface abuts against the supporting surface of the concrete base 1 to ensure the horizontality of the mobile frame 31. The force block 61 compresses the elastic member 62 under the action of the mobile frame 31 and abuts against the pressure sensor 63. At this time, the pressure values ​​on multiple pressure sensors 63 are close; and when the lifting hydraulic cylinder 33 drives the mobile frame 31 to move upward, according to the order of the pressure value change of the pressure sensor 63, the control system determines the action of each lifting hydraulic cylinder 33 to control the displacement compensation hydraulic cylinder 4 to reversely compensate the displacement of the first lifting hydraulic cylinder 33, and to positively compensate the position of the last lifting hydraulic cylinder 33. Reverse compensation refers to the direction in which the lifting hydraulic cylinder 33 drives the mobile frame 31 to descend, and positive compensation refers to the direction in which the lifting hydraulic cylinder 33 drives the mobile frame 31 to rise.

[0039] The pressure sensor 63 monitors the pressure value at each supporting point of the mobile frame 31 in real time, and the control system judges the action of each lifting hydraulic cylinder 33 according to the pressure value data fed back by the pressure sensor 63, and dynamically compensates the stroke deviation of the lifting hydraulic cylinder 33 by adjusting the compensation direction of the displacement compensation hydraulic cylinder 4, effectively ensuring the horizontality of the supporting surface formed by multiple movable tooth plates 32. And by utilizing the early sensing ability of the pressure sensor 63, the displacement compensation hydraulic cylinder 4 starts to work in the early stage of the action of the lifting hydraulic cylinder 33, reducing the problem of the load-bearing surface tilt caused by the inconsistent action of the lifting hydraulic cylinder 33, and improving the synchronization and stability of the entire system.

[0040] The present invention also provides a continuous casting step-by-step steel billet turning cooling bed steel pushing method, which is applied to a continuous casting step-by-step steel billet turning cooling bed steel pushing device, comprising the following steps: Start the driving hydraulic cylinder assembly, and the two sets of lifting hydraulic cylinders 33 start working to drive the moving frame 31 to rise. At the same time, the lateral hydraulic cylinder 34 moves forward and backward as needed to move the moving frame 31 in the vertical direction; The displacement compensation hydraulic cylinder 4 is started, and the controller controls the displacement compensation hydraulic cylinder 4 to fine-tune the lifting distance according to the lifting distance signals of the two groups of lifting hydraulic cylinders 33 sensed by the external displacement sensor, until the movable tooth plate 32 rises above the static rack, and the movable tooth plate 32 supports the steel billet at this time; The traverse hydraulic cylinder 34 starts to move, and the lifting hydraulic cylinder 33 is lifted and lowered as needed to drive the moving frame 31 to move forward to the stepping end position; The lifting hydraulic cylinder 33 is switched to operate, and the lateral hydraulic cylinder 34 moves forward and backward as needed, so that the movable frame 31 descends in the vertical direction until the movable tooth plate 32 descends below the stationary rack. At this time, the stationary tooth plate 21 supports the steel billet; The lateral hydraulic cylinder 34 is activated again, and the lifting hydraulic cylinder 33 is lifted and lowered as required, driving the movable frame 31 to move backward to the initial stepping position; The above-mentioned stepping action is repeated, and the movable tooth plate 32 and the stationary tooth plate 21 alternately support the steel billet, pushing the steel billet to form a stepping action until the steel billet is pushed to a predetermined position.

[0041] This process ensures the smooth movement and support of the billet on the cooling bed, and also ensures the accuracy and synchronization of the stepping action of the cooling bed. By precisely controlling the actions of the lifting hydraulic cylinder 33 and the traverse hydraulic cylinder 34, as well as the fine adjustment of the displacement compensation hydraulic cylinder 4, the billet can be effectively pushed to move along the predetermined path, achieving efficient and stable operation during the continuous casting process.

[0042] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A continuous casting step-by-step billet turning cooling bed pushing device, characterized in that: include: A concrete base, and a static beam system and a dynamic beam system arranged on the concrete base; The static beam system includes a plurality of static tooth plates arranged perpendicular to the stepping direction; The movable beam system includes a movable frame, a plurality of movable tooth plates arranged on the movable frame and arranged alternately and parallel to the plurality of stationary tooth plates, and a driving hydraulic cylinder assembly supporting and driving the movable frame to perform stepping motion; Wherein, the first tooth shape on the stationary tooth plate and the second tooth shape on the movable tooth plate are inclined in opposite directions; The driving hydraulic cylinder assembly includes at least two groups of lifting hydraulic cylinders and at least one group of lateral hydraulic cylinders, a displacement compensation hydraulic cylinder is provided at the driving end of the lifting hydraulic cylinder and the lateral hydraulic cylinder, and an external displacement sensor is provided on the lateral hydraulic cylinder and the lifting hydraulic cylinder; During stepping, the two groups of lifting hydraulic cylinders drive the mobile frame to rise, and work together with the transverse hydraulic cylinder to make the several movable tooth plates and the several static tooth plates alternately support the steel billet to form a stepping action; and when the second tooth shape rises to a position close to the first tooth shape, the controller receives the lifting distance signals of the two groups of lifting hydraulic cylinders sensed by the external displacement sensor, and controls the displacement compensation hydraulic cylinder to compensate for the lifting distance.

2. The continuous casting step-by-step billet turning cooling bed steel pushing device according to claim 1 is characterized in that: The stationary gear plate and the movable gear plate are arranged in sections along the length direction; The ends of two adjacent stationary gear plates or two adjacent movable gear plates are overlapped, and a support seat is arranged at the overlapped position.

3. The continuous casting step-by-step billet turning and cooling bed pushing device according to claim 1 is characterized in that: The distance between two adjacent tooth height points of the first tooth shape and the second tooth shape is equal; The first tooth shape includes a first plane rib and a first arc rib arranged at an angle with the first plane rib, and the first plane rib is arranged obliquely along the stepping direction, and the first arc rib is arranged convexly along the stepping direction; The second tooth shape includes a second plane rib and a second arc rib arranged at an angle with the second plane rib, and the second plane rib is inclined in the opposite direction of stepping, while the second arc rib is convex in the opposite direction of stepping.

4. The continuous casting step-by-step billet turning and cooling bed pushing device according to claim 3 is characterized in that: A vertical distance from a tooth high point to a tooth low point of the second tooth shape is greater than a vertical distance from a tooth high point to a tooth low point of the first tooth shape.

5. The continuous casting step-by-step billet turning and cooling bed pushing device according to claim 3 is characterized in that: Two adjacent first tooth shapes on the stationary tooth plate form a fixed placement groove at the tooth low point; Two adjacent second tooth shapes on the movable tooth plate form a movable placement groove at the tooth low point, and the opening angle of the movable placement groove is smaller than the opening angle of the fixed placement groove; When the movable tooth plate rises, the tooth low point of the movable placement groove and the tooth low point of the fixed placement groove are located on the same vertical line, and the second curved rib drives the steel billet to flip and positions the steel billet together with the first curved rib.

6. The continuous casting step-by-step billet turning and cooling bed steel pushing device according to claim 1 is characterized in that: When the movable tooth plate performs a stepping motion relative to the stationary tooth plate, a no-load state, a transport state and a loaded state are formed; When the second tooth shape is lower than the first tooth shape, it is in an unloaded state, and the lifting hydraulic cylinder works together with the displacement compensation hydraulic cylinder and cooperates with the lateral hydraulic cylinder to enable the moving frame to quickly move from the end position of the step to the starting position; When the second tooth shape overlaps with the first tooth shape, the steel billet is in a transfer state. The displacement compensation hydraulic cylinder acts on the moving frame, and the moving frame slowly moves to transfer the steel billet on the stationary tooth plate to the movable tooth plate. When the second tooth shape is higher than the first tooth shape, it is in a load state. The lifting hydraulic cylinder acts on the moving frame and cooperates with the transverse hydraulic cylinder to drive the moving frame so that the movable tooth plate moves the steel billet from the starting position of the step to the end position at a uniform speed.

7. The continuous casting step-by-step billet turning and cooling bed pushing device according to claim 1 is characterized in that: The two groups of lifting hydraulic cylinders are arranged in the vertical direction and below the moving frame in the stepping direction; One group of the lateral hydraulic cylinders is located between the two groups of the lifting hydraulic cylinders and is arranged in the horizontal direction; Wherein, both ends of the lifting hydraulic cylinder and the lateral hydraulic cylinder are provided with hinge joints.

8. The continuous casting step-by-step billet turning and cooling bed pushing device according to claim 1 is characterized in that: The displacement compensation hydraulic cylinder includes a cylinder body, a cylinder cover arranged at one end of the cylinder body facing the lifting hydraulic cylinder, and a piston rod arranged in the cylinder body; The rod body of the piston rod extends out of the cylinder cover and is connected to the rod body of the lifting hydraulic cylinder, and one end of the cylinder body away from the cylinder cover is connected to the hinge joint; Wherein, the piston rod is provided with a first step surface at the center of the end surface of the rodless oil chamber, and the cylinder body is provided with a second step surface on the surface opposite to the first step surface, and when the first step surface contacts the second step surface, an annular oil inlet chamber is formed at the outer edge; A first oil circuit is provided at a position of the cylinder body corresponding to the annular oil inlet cavity, and a second oil circuit is provided on the cylinder cover.

9. The continuous casting step-by-step billet turning and cooling bed steel pushing device according to claim 8, characterized in that: The piston head corresponding to the piston rod of the displacement compensation hydraulic cylinder is located in the middle position of the cylinder body; A pressure sensing component is arranged on the contact surface between the concrete base and the mobile frame corresponding to each supporting point, and the pressure sensing component includes a force-bearing block and a pressure sensor arranged between the force-bearing block and the concrete base; The force-bearing block has a first protrusion and a second protrusion on one side facing the pressure sensor, the first protrusion contacts the pressure sensor, an elastic member is provided between the second protrusion and the concrete base, and a limiting step surface is provided at the end position of the second protrusion.

10. A method for pushing steel on a continuous casting step-by-step steel billet turning and cooling bed, applied to the continuous casting step-by-step steel billet turning and cooling bed pushing steel device as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Start the driving hydraulic cylinder assembly, and the two sets of lifting hydraulic cylinders start working to drive the mobile frame to rise. At the same time, the horizontal hydraulic cylinder moves forward and backward as needed to move the mobile frame in the vertical direction; Start the displacement compensation hydraulic cylinder. The controller controls the displacement compensation hydraulic cylinder to fine-tune the lifting distance according to the lifting distance signals of the two groups of lifting hydraulic cylinders sensed by the external displacement sensor, until the movable gear plate rises above the static rack. At this time, the movable gear plate supports the steel billet. The traverse hydraulic cylinder starts to move, and the lifting hydraulic cylinder moves up and down as needed to drive the moving frame to move forward to the stepping end position; The lifting hydraulic cylinder is switched to move, and the lateral hydraulic cylinder moves forward and backward as needed, so that the movable frame descends in the vertical direction until the movable gear plate descends below the static gear plate, at which time the static gear plate supports the billet; The lateral hydraulic cylinder moves again, and at the same time the lifting hydraulic cylinder moves up and down as needed, driving the moving frame to move backward to the initial stepping position; Repeat the above-mentioned stepping action, and the movable tooth plate and the stationary tooth plate alternately support the steel billet until the steel billet is pushed to the predetermined position.

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