A continuous casting walking billet turning cooling bed pusher device and method

Abstract

The present invention relates to the technical field of billet production, and particularly to a pushing device and method for a continuous casting walking billet turning cooling bed, which includes a concrete base, a static beam system and a moving beam system; the static beam system includes a number of static tooth plates; the moving beam system includes a moving frame, a number of moving tooth plates and a driving hydraulic cylinder assembly; the first tooth shape on the static tooth plate and the second tooth shape on the moving 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 transverse moving hydraulic cylinders, and displacement compensation hydraulic cylinders are provided at the driving ends of the lifting hydraulic cylinders and the transverse moving hydraulic cylinders, and external displacement sensors are provided on both the transverse moving hydraulic cylinders and the lifting hydraulic cylinders. By the combined use of the displacement sensors and the displacement compensation hydraulic cylinders, the present invention effectively solves the problems of asynchronous driving and inconsistent stroke of the lifting hydraulic cylinders, ensures the levelness of the support surface of the moving tooth plates, reduces the risks of billet stacking inclination and dropping, and improves the operation efficiency and safety of the cooling bed of the continuous casting machine.

Description

Technical Field

[0001] The present invention relates to the technical field of billet production, and particularly to a pusher device and method for a continuous casting walking billet turning cooling bed. Background Art

[0002] The billets produced by a 6-meter arc square billet continuous caster are cooled and straightened by a 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 movement mechanism and a lifting mechanism to realize the turning and cooling of the continuous casting billets.

[0003] However, since the movable frame mainly relies on multiple lifting mechanisms for lifting drive, and there are uncertainties in the initial response time and stroke control of the multiple lifting mechanisms, these problems may cause the bearing surface for carrying the billets on the movable frame to tilt. The tilt of the bearing surface not only affects the orderly arrangement of the billets, but also may cause the billets to fall during the transverse movement of the movable frame, thus bringing potential safety hazards. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a pusher device and method for a continuous casting walking billet turning cooling bed, which can effectively solve the problems in the background art.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a pusher device for a continuous casting walking billet turning cooling bed, comprising: a concrete base, and a static beam system and a moving beam system provided on the concrete base;

[0006] The static beam system includes a plurality of static tooth plates arranged perpendicular to the walking direction;

[0007] The moving beam system includes a moving frame, a plurality of moving tooth plates arranged alternately and parallel to the plurality of static tooth plates on the moving frame, and a driving hydraulic cylinder assembly for supporting and driving the moving frame to perform a walking action;

[0008] Wherein, a first tooth shape on the static tooth plate and a second tooth shape on the moving tooth plate are inclined in opposite directions;

[0009] The driving hydraulic cylinder assembly includes at least two groups of lifting hydraulic cylinders and at least one group of transverse movement hydraulic cylinders. Displacement compensation hydraulic cylinders are provided at the driving ends of the lifting hydraulic cylinders and the transverse movement hydraulic cylinders, and external displacement sensors are provided on both the transverse movement hydraulic cylinders and the lifting hydraulic cylinders;

[0010] During stepping, the two sets of lifting hydraulic cylinders drive the moving frame to rise, and cooperate with the transverse movement hydraulic cylinder to support the steel billet alternately by a plurality of moving tooth plates and a plurality of static tooth plates to form a stepping action; when the second tooth shape rises to a position close to the first tooth shape, the controller receives the jacking distance signals of the two sets of lifting hydraulic cylinders sensed by the external displacement sensor, and controls the displacement compensation hydraulic cylinder to compensate the jacking distance.

[0011] Further, the static tooth plates and the moving tooth plates are arranged in sections along the length direction;

[0012] And the ends of two adjacent static tooth plates or two adjacent moving tooth plates are overlapped, and a support seat is arranged at the overlapping position.

[0013] Further, the distances between the first tooth shape and the second tooth shape located between two adjacent tooth high points are equal;

[0014] The first tooth shape includes a first planar retaining edge and a first arc-shaped retaining edge arranged at an angle with the first planar retaining edge, and the first planar retaining edge is inclined along the stepping direction, while the first arc-shaped retaining edge protrudes along the stepping direction;

[0015] The second tooth shape includes a second planar retaining edge and a second arc-shaped retaining edge arranged at an angle with the second planar retaining edge, and the second planar retaining edge is inclined along the reverse stepping direction, while the second arc-shaped retaining edge protrudes along the reverse stepping direction.

[0016] Further, the vertical distance from the tooth high point to the tooth low point of the second tooth shape is greater than the vertical distance from the tooth high point to the tooth low point of the first tooth shape.

[0017] Further, fixed placement grooves are formed at the tooth low points of two adjacent first tooth shapes on the static tooth plate;

[0018] Movable placement grooves are formed at the tooth low points of two adjacent second tooth shapes on the moving tooth plate, and the opening angle of the movable placement groove is smaller than the opening angle of the fixed placement groove;

[0019] When the moving tooth plate rises, the tooth low points of the movable placement groove and the fixed placement groove are located on the same vertical line, and the second arc-shaped retaining edge drives the steel billet to flip and positions the steel billet together with the first arc-shaped retaining edge.

[0020] Further, when the moving tooth plate performs a stepping action relative to the static tooth plate, an unloaded state, a transfer state and a loaded state will be formed;

[0021] When the second tooth profile is lower than the first tooth profile, it is in the no-load state. The lifting hydraulic cylinder and the displacement compensation hydraulic cylinder act together and cooperate with the transverse movement hydraulic cylinder to quickly move the moving frame from the end position of the step to the starting position.

[0022] When the second tooth profile overlaps with the first tooth profile, it is in the transfer state. The displacement compensation hydraulic cylinder acts on the moving frame, and the billet on the static tooth plate is transferred to the moving tooth plate through the slow movement of the moving frame.

[0023] When the second tooth profile is higher than the first tooth profile, it is in the load state. The lifting hydraulic cylinder acts on the moving frame and cooperates with the transverse movement hydraulic cylinder to drive the moving frame to uniformly move the billet from the starting position of the step to the end position by the moving tooth plate.

[0024] Further, the two groups of lifting hydraulic cylinders are arranged in the vertical direction and are arranged below the moving frame along the step direction.

[0025] One group of transverse movement hydraulic cylinders is located between the two groups of lifting hydraulic cylinders and is arranged in the horizontal direction.

[0026] Wherein, hinge joints are provided at both ends of the lifting hydraulic cylinder and the transverse movement hydraulic cylinder.

[0027] Further, the displacement compensation hydraulic cylinder includes a cylinder body, a cylinder head provided at one end of the cylinder body facing the lifting hydraulic cylinder, and a piston rod provided in the cylinder body.

[0028] The rod body of the piston rod extends out of the cylinder head and is connected to the rod body of the lifting hydraulic cylinder, and one end of the cylinder body away from the cylinder head is connected to the hinge joint.

[0029] Wherein, a first step surface is provided at the center position of the end face of the piston rod located in the rodless oil chamber, and a second step surface is provided on the opposite surface of the cylinder body and the first step surface. When the first step surface contacts the second step surface, an annular oil inlet chamber is formed at the outer edge.

[0030] The cylinder body is provided with a first oil passage corresponding to the annular oil inlet chamber, and a second oil passage is provided on the cylinder head.

[0031] Further, the piston head corresponding to the piston rod of the displacement compensation hydraulic cylinder is located at the middle position of the cylinder body.

[0032] Pressure sensing components are arranged corresponding to each support point on the contact surface between the concrete base and the moving frame. The pressure sensing components include force-receiving blocks and pressure sensors arranged between the force-receiving blocks and the concrete base.

[0033] Wherein, a first protrusion and a second protrusion are provided on a surface of the force-bearing block facing the pressure sensor. The first protrusion is in contact with the pressure sensor, an elastic member is provided between the second protrusion and the concrete base, and a limiting step surface is provided at an end position of the second protrusion.

[0034] The present invention also provides a method for pushing a continuous casting stepped billet turning cooling bed, which is applied to the continuous casting stepped billet turning cooling bed pushing device as described above, and includes the following steps:

[0035] Start the driving hydraulic cylinder assembly, and the two sets of lifting hydraulic cylinders start to work, driving the moving frame to rise. At the same time, the transverse movement hydraulic cylinder moves forward and backward as required, so that the moving frame moves in the vertical direction;

[0036] Start the displacement compensation hydraulic cylinder. The controller controls the displacement compensation hydraulic cylinder to finely adjust the jacking distance according to the jacking distance signals of the two sets of lifting hydraulic cylinders sensed by the external displacement sensor until the moving tooth plate rises above the static rack. At this time, the moving tooth plate supports the billet;

[0037] The transverse movement hydraulic cylinder starts to act, and at the same time, the lifting hydraulic cylinder rises and falls as required to drive the moving frame to move forward to the stepped end position;

[0038] Switch the action of the lifting hydraulic cylinder, and the transverse movement hydraulic cylinder moves forward and backward as required, so that the moving frame descends in the vertical direction until the moving tooth plate descends below the static rack. At this time, the static tooth plate supports the billet;

[0039] The transverse movement hydraulic cylinder acts again, and at the same time, the lifting hydraulic cylinder rises and falls as required to drive the moving frame to move backward to the stepped initial position;

[0040] Repeat the above stepped actions, and the moving tooth plate and the static tooth plate alternately support the billet until the billet is pushed to a predetermined position.

[0041] The beneficial effects of the present invention are as follows: By the combined use of the displacement sensor and the displacement compensation hydraulic cylinder, the present invention can effectively solve the problems of asynchronous driving and inconsistent stroke of the lifting hydraulic cylinders, ensure the flatness of the support surface of the moving tooth plate, reduce the risks of billet stacking inclination and dropping, and improve the operation efficiency and safety of the continuous casting machine cooling bed. Description of the Drawings

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0043] Figure 1 Schematic diagram of the support of the steel billet by the static tooth plate in the embodiment of the present invention;

[0044] Figure 2 Schematic diagram of the support of the steel billet by the moving tooth plate in the embodiment of the present invention;

[0045] Figure 3 Schematic diagram of the stepping process of the pusher device of the cooling bed in the embodiment of the present invention;

[0046] Figure 4 Schematic diagram of the positioning of the steel billet by the first arc-shaped edge and the second arc-shaped edge in the embodiment of the present invention;

[0047] Figure 5 Schematic diagram of the positions of the moving tooth plate in the no-load state, transfer state, and load state in the embodiment of the present invention;

[0048] Figure 6 Schematic diagram of the first state structure of the displacement compensation hydraulic cylinder in the embodiment of the present invention;

[0049] Figure 7 Schematic diagram of the second state structure of the displacement compensation hydraulic cylinder in the embodiment of the present invention;

[0050] Figure 8 is Figure 1 Partial enlarged view of location A of

[0051] Reference numerals: 1, concrete base; 2, static beam system; 21, static tooth plate; 211, first tooth shape; 211a, first flat edge; 211b, first arc-shaped edge; 211c, fixed placement groove; 3, moving beam system; 3A, no-load state; 3B, transfer state; 3C, load state; 31, moving frame; 32, moving tooth plate; 321, second tooth shape; 321a, second flat edge; 321b, second arc-shaped edge; 321c, movable placement groove; 33, lifting hydraulic cylinder; 34, transverse movement hydraulic cylinder; 4, displacement compensation hydraulic cylinder; 4a, annular oil inlet cavity; 4b, first oil path; 4c, second oil path; 41, cylinder block; 411, second step surface; 42, cylinder head; 43, piston rod; 431, first step surface; 5, support seat; 6, pressure sensing assembly; 61, force-receiving block; 62, elastic member; 63, pressure sensor. Detailed implementation manners

[0052] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0053] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate 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.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the specification of this invention are only for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0055] As Figures 1 to 3 shown in the continuous casting walking billet turning cooling bed pusher device, it includes a concrete base 1, and a static beam system 2 and a moving beam system 3 arranged on the concrete base 1;

[0056] The static beam system 2 includes a plurality of static tooth plates 21 arranged perpendicular to the walking direction; the moving beam system 3 includes a moving frame 31, a plurality of moving tooth plates 32 arranged alternately and parallel to the plurality of static tooth plates 21 on the moving frame 31, and a driving hydraulic cylinder assembly for supporting and driving the moving frame 31 to perform a walking action;

[0057] Among them, the first tooth shape 211 on the static tooth plate 21 and the second tooth shape 321 on the moving tooth plate 32 are inclined in opposite directions; the driving hydraulic cylinder assembly includes at least two sets of lifting hydraulic cylinders 33 and at least one set of transverse hydraulic cylinders 34. Displacement compensation hydraulic cylinders 4 are provided at the driving ends of the lifting hydraulic cylinders 33 and the transverse hydraulic cylinders 34, and external displacement sensors (not shown in the figure) are provided on both the transverse hydraulic cylinders 34 and the lifting hydraulic cylinders 33;

[0058] During walking, the two sets of lifting hydraulic cylinders 33 drive the moving frame 31 to rise, and act together with the transverse hydraulic cylinders 34 to support the steel billet alternately with a plurality of moving tooth plates 32 and a plurality of static tooth plates 21 to form a walking action; when the second tooth shape 321 rises to a position close to the first tooth shape 211, the controller receives the jacking distance signals of the two sets of lifting hydraulic cylinders 33 sensed by the external displacement sensors, and controls the displacement compensation hydraulic cylinders 4 to compensate the jacking distance.

[0059] In the present invention, a sunken foundation pit is provided inside the concrete base 1, the static beam system 2 is arranged on the columns of the foundation pit, and the moving beam system 3 is floatingly arranged above the foundation pit. Specifically, the moving frame 31 is arranged above the foundation pit through the open groove of the column. One end of the lifting hydraulic cylinder 33 is installed at the bottom of the foundation pit through an embedded part, and the other end is connected to the moving frame 31 for driving the moving frame 31 to lift. The transverse movement hydraulic cylinder 34 is arranged on one side of the column of the foundation pit through an embedded part for driving the moving frame 31 to move along the stepping direction. In the specific implementation process, the lifting hydraulic cylinder 33 and the displacement compensation hydraulic cylinder 4 control the lifting height of the moving frame 31 to ensure the levelness of the supporting surface where the moving frame 31 is located; the transverse movement hydraulic cylinder 34 and the displacement compensation hydraulic cylinder 4 control the corresponding positions of the second tooth profile 321 on the moving tooth plate 32 and the first tooth profile 211 on the static tooth plate 21. If the absolute value of the difference in the extended displacements of the piston rods 43 of the two transverse movement hydraulic cylinders 34 is greater than or equal to the set threshold, the control system controls the displacement compensation hydraulic cylinder 4 to start operating to ensure that the difference in the extended displacements of the piston rods 43 is less than the set threshold.

[0060] Through the coordinated use of the displacement sensor and the displacement compensation hydraulic cylinder 4, the problems of asynchronous driving and inconsistent stroke of the lifting hydraulic cylinder 33 can be effectively solved, the levelness of the supporting surface of the moving tooth plate 32 can be ensured, the risk of billet stacking tilt and dropping can be reduced, and the operation efficiency and safety of the cooling bed of the continuous casting machine can be improved.

[0061] In the present invention, the static tooth plate 21 and the moving tooth plate 32 are arranged in sections along the length direction, which reduces the processing difficulty. According to different process requirements, customized design can be carried out on the tooth plates of different paragraphs to adapt to different working environments and load conditions, and each tooth section can be interchanged, which improves the practicability. Moreover, the ends of adjacent two static tooth plates 21 or adjacent two moving tooth plates 32 are overlapped, and a support seat 5 is arranged at the overlapping position. The overlapping design at the ends enhances the connection stiffness 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.

[0062] In the preferred solution, the distances between the first tooth profile 211 and the second tooth profile 321 between adjacent two tooth high points are equal, which can ensure the synchronism and accuracy during the transmission process. The first tooth profile 211 includes a first planar retaining edge 211a and a first arc-shaped retaining edge 211b arranged at an angle to the first planar retaining edge 211a, and the first planar retaining edge 211a is inclined along the stepping direction, while the first arc-shaped retaining edge 211b protrudes along the stepping direction; the second tooth profile 321 includes a second planar retaining edge 321a and a second arc-shaped retaining edge 321b arranged at an angle to the second planar retaining edge 321a, and the second planar retaining edge 321a is inclined along the reverse stepping direction, while the second arc-shaped retaining edge 321b protrudes along the reverse stepping direction.

[0063] The first planar retaining edge 211a and the second planar retaining edge 321a can make the billet dock at a specified inclined position, while the first arc-shaped retaining edge 211b and the second arc-shaped retaining edge 321b can make the billet flip during the lifting and lowering process of the moving rack, and the arc controls the flipping of the billet more evenly, making the transmission process smoother, reducing the impact and vibration between teeth, and thus significantly reducing the operating noise.

[0064] On the basis of the above solution, the vertical distance from the tooth high point to the tooth low point of the second tooth profile 321 is greater than the vertical distance from the tooth high point to the tooth low point of the first tooth profile 211.

[0065] The position of the tooth high point of the first tooth profile 211 is set lower, which can reduce the vertical movement distance required during the lifting and lowering process of the moving tooth plate 32, while the tooth high point of the second tooth profile 321 is set higher than the tooth high point of the first tooth profile 211, ensuring the stability of the billet in the tooth profile groove during the lateral movement of the moving tooth plate 32, reducing the vibration and displacement of the billet during the movement, and improving the overall stability and safety.

[0066] As a preference of the above solution, between two adjacent first tooth profiles 211 on the static tooth plate 21, a fixed placement groove 211c is formed at the tooth low point; between two adjacent second tooth profiles 321 on the moving tooth plate 32, a movable placement groove 321c is formed 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;

[0067] As Figure 4 shown, when the moving tooth plate 32 rises, the tooth low points of the movable placement groove 321c and the fixed placement groove 211c are on the same vertical line. The second arc-shaped retaining edge 321b drives the billet to flip and positions the billet together with the first arc-shaped retaining edge 211b. The first arc-shaped retaining edge and the second arc-shaped retaining edge can straighten the billet and make the billet fall smoothly onto the second planar retaining edge 321a, ensuring that the billet will not be displaced or fall off during the straightening and moving processes, and improving the accuracy and efficiency of billet processing.

[0068] In a preferred embodiment of the present invention, as Figure 5 shown, when the moving tooth plate 32 makes a step motion relative to the static tooth plate 21, an unloaded state 3A, a transfer state 3B, and a loaded state 3C will be formed;

[0069] When the second tooth profile 321 is lower than the first tooth profile 211, it is in the unloaded state 3A. The lifting hydraulic cylinder 33 and the displacement compensation hydraulic cylinder 4 act together and cooperate with the lateral movement hydraulic cylinder 34 to quickly move the moving frame 31 from the end position of the step to the starting position;

[0070] When the second tooth profile 321 overlaps with the first tooth profile 211, it is in the transfer state 3B. The displacement compensation hydraulic cylinder 4 acts on the moving frame 31, and the billet on the static tooth plate 21 is transferred to the moving tooth plate 32 through the slow movement of the moving frame 31.

[0071] When the second tooth profile 321 is higher than the first tooth profile 211, it is in the load state 3C. The lifting hydraulic cylinder 33 acts on the moving frame 31 and cooperates with the transverse movement hydraulic cylinder 34 to drive the moving frame 31 to move the moving tooth plate 32 to move the billet from the starting position of the step to the end position at a constant speed.

[0072] The step 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 load state 3C, and the moving speed in the load state 3C is greater than the moving speed in the transfer state 3B. Moving quickly in the no-load state 3A can reduce non-production time and improve the overall operation efficiency; moving slowly in the transfer state 3B helps to accurately control the transfer process of the billet and ensure that the billet moves from the static tooth plate 21 to the moving tooth plate 32 smoothly and accurately; moving slowly in the load state 3C can reduce the impact on the equipment and the billet, reduce the risk of wear and damage, and extend the service life of the equipment.

[0073] In the present invention, two groups of lifting hydraulic cylinders 33 are arranged vertically and are arranged below the moving frame 31 along the step direction; one group of transverse movement hydraulic cylinders 34 is located between the two groups of lifting hydraulic cylinders 33 and is arranged horizontally, and hinge joints are provided at both ends of the lifting hydraulic cylinder 33 and the transverse movement hydraulic cylinder 34.

[0074] Specifically, two lifting hydraulic cylinders 33 are a group, and the two groups of lifting hydraulic cylinders 33 are arranged along the step direction, and one group of transverse movement hydraulic cylinders 34 is arranged between the two groups of lifting hydraulic cylinders 33. This combination ensures the stability of the moving frame 31 in the vertical and horizontal directions; the use of hinge joints allows the hydraulic cylinders to freely expand and contract in their respective movement planes, providing flexible mobility, reducing mechanical interference, and enabling the moving frame 31 to perform step actions smoothly.

[0075] In the preferred embodiment of the present invention, as Figure 6 shown, the displacement compensation hydraulic cylinder 4 includes a cylinder block 41, a cylinder head 42 provided at one end of the cylinder block 41 facing the lifting hydraulic cylinder 33, and a piston rod 43 provided in the cylinder block 41; the rod body of the piston rod 43 extends out of the cylinder head 42 and is connected to the rod body of the lifting hydraulic cylinder 33, and one end of the cylinder block 41 away from the cylinder head 42 is connected to the hinge joint;

[0076] Among them, a first step surface 431 is provided at the center position of the end face of the piston rod 43 located in the rodless oil chamber, and a second step surface 411 is provided on the opposite surface of the cylinder block 41 and 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; a first oil passage 4b is provided at the position of the cylinder block 41 corresponding to the annular oil inlet chamber 4a, and a second oil passage 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 rod is provided at the center position of the end face of the cylinder block 41. The cylinder block 41 of the lifting hydraulic cylinder 33 is connected to the threaded hole, and the hinge joint is connected to the screw rod, which is convenient for later replacement and improves the installation convenience of the displacement compensation hydraulic cylinder 4. In addition, sealing structures are provided on the piston rod 43, the cylinder block 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 elaborated here.

[0077] When the cooling bed starts to step and push the steel, 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 contacts the second step surface 411; as the moving frame 31 continues to rise, the external displacement sensor continuously detects the rising height of the corresponding support point of the moving frame 31; 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, at this time, the displacement compensation hydraulic cylinder 4 starts to act, and the hydraulic oil enters the rodless oil chamber through the first oil passage 4b. Under the action of the hydraulic pressure of the hydraulic oil, the cylinder block 41 moves in the direction away from the lifting hydraulic cylinder 33 to compensate for the extended stroke of the lifting hydraulic cylinder 33. In the present invention, the displacement compensation hydraulic cylinder 4 compensates for the lifting hydraulic cylinders 33 with different strokes to ensure the levelness of the moving frame 31, further ensure the levelness of the support surface of the moving tooth plate 32, and ensure the stable transfer of the billet. The annular oil inlet chamber 4a formed at the outer edge improves the response speed of the oil passage.

[0078] In the present invention, due to the limited stroke of the displacement compensation hydraulic cylinder 4, it is impossible to achieve compensation for a large gap. Therefore, in the preferred solution, such as Figures 7 - 8As shown in the figure, the piston head corresponding to the piston rod 43 of the displacement compensation hydraulic cylinder 4 is located at the middle position of the cylinder block 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, which limits its detection ability of displacement change in the early stage. Therefore, in order to accelerate the response speed of the displacement compensation hydraulic cylinder, pressure sensing components 6 are arranged at the contact surface between the concrete base 1 and the moving frame 31 corresponding to each support point. The pressure sensing component 6 includes a force receiving block 61 and a pressure sensor 63 arranged between the force receiving block 61 and the concrete base 1. Among them, the surface of the force receiving block 61 facing the pressure sensor 63 is provided with a first protrusion and a second protrusion. The first protrusion is in contact with the pressure sensor 63, and an elastic member 62 is arranged between the second protrusion and the concrete base 1, and a limiting step surface is arranged at the end position of the second protrusion.

[0079] In the initial state of the cooling bed, the moving 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 levelness of the moving frame 31. The force receiving block 61 compresses the elastic member 62 under the action of the moving frame 31 and abuts against the pressure sensor 63. At this time, the pressure values on the multiple pressure sensors 63 are close. When the lifting hydraulic cylinder 33 drives the moving frame 31 to move upward, according to the sequence of the change of the pressure values of the pressure sensors 63, the control system judges the action conditions of each lifting hydraulic cylinder 33, so as to control the displacement compensation hydraulic cylinder 4 to perform reverse compensation on the displacement of the lifting hydraulic cylinder 33 that moves first, and perform forward compensation on the position of the lifting hydraulic cylinder 33 that moves last. Reverse compensation refers to the direction in which the lifting hydraulic cylinder 33 drives the moving frame 31 to descend, and forward compensation refers to the direction in which the lifting hydraulic cylinder 33 drives the moving frame 31 to ascend.

[0080] The pressure values at each support point of the moving frame 31 are monitored in real time through the pressure sensors 63. The control system judges the action conditions of each lifting hydraulic cylinder 33 according to the pressure value data fed back by the pressure sensors 63, and adjusts the compensation direction of the displacement compensation hydraulic cylinder 4 to dynamically compensate for the stroke deviation of the lifting hydraulic cylinder 33, effectively ensuring the levelness of the supporting surface formed by the multiple moving tooth plates 32. And by using the early sensing ability of the pressure sensors 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 inclination of the bearing surface caused by the inconsistent action of the lifting hydraulic cylinders 33, and improving the synchronism and stability of the whole system.

[0081] The present invention also provides a method for pushing steel billets on a continuous casting walking steel billet turning cooling bed, which is applied to a continuous casting walking steel billet turning cooling bed steel pushing device, and includes the following steps:

[0082] Start the driving hydraulic cylinder assembly, and the two groups of lifting hydraulic cylinders 33 start to work, driving the moving frame 31 to rise. At the same time, the transverse movement hydraulic cylinder 34 moves back and forth as required to enable the moving frame 31 to move in the vertical direction;

[0083] Start the displacement compensation hydraulic cylinder 4. The controller controls the displacement compensation hydraulic cylinder 4 to finely adjust the jacking distance according to the jacking distance signals of the two groups of lifting hydraulic cylinders 33 sensed by the external displacement sensors until the moving tooth plate 32 rises above the stationary rack. At this time, the moving tooth plate 32 supports the billet;

[0084] The transverse movement hydraulic cylinder 34 starts to act. At the same time, the lifting hydraulic cylinders 33 rise and fall as required to drive the moving frame 31 to move forward to the end position of the step;

[0085] Switch the action of the lifting hydraulic cylinders 33, and the transverse movement hydraulic cylinder 34 moves back and forth as required to make the moving frame 31 descend in the vertical direction until the moving tooth plate 32 descends below the stationary rack. At this time, the stationary tooth plate 21 supports the billet;

[0086] The transverse movement hydraulic cylinder 34 acts again. At the same time, the lifting hydraulic cylinders 33 rise and fall as required to drive the moving frame 31 to move backward to the initial position of the step;

[0087] Repeat the above step actions. The moving tooth plate 32 and the stationary tooth plate 21 alternately support the billet, pushing the billet to form a step action until the billet is pushed to the predetermined position.

[0088] This process ensures the smooth movement and support of the billet on the cooling bed, and also guarantees the accuracy and synchronization of the step actions of the cooling bed. By precisely controlling the actions of the lifting hydraulic cylinders 33 and the transverse movement 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, realizing efficient and stable operation in the continuous casting process.

[0089] Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended 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.

Images