Pump-controlled hydraulic oscillation device for crystallizer, and continuous casting machine

Abstract

A pump-controlled hydraulic oscillation device for a crystallizer, the device comprising a connecting frame (10) and at least one oscillation unit (11) arranged on the connecting frame, wherein the oscillation unit comprises a fixed frame (20) connected to the connecting frame, an oscillating frame (21) movably arranged in the fixed frame, a guide mechanism connected between the fixed frame and the oscillating frame, and a driving mechanism (30) for driving the oscillating frame to oscillate up and down relative to the fixed frame; the driving mechanism has a housing connected to the fixed frame; a servo electric motor (31), a bidirectional hydraulic pump (33) and a driving hydraulic cylinder (34) which are sequentially connected are provided in the housing; and a cylinder rod of the driving hydraulic cylinder is connected to the oscillating frame and is configured to drive the oscillating frame to oscillate up and down. Further provided is a continuous casting machine. The pump-controlled hydraulic oscillation device for a crystallizer eliminates the impact of oil cleanliness on oscillation, prevents the problem of blockage of a servo valve, and improves production efficiency.

Description

Pump-controlled crystallizer hydraulic vibration device and continuous casting machine

[0001] Related applications

[0002] The present application claims priority to Chinese Patent Application No. 202411330096.8, filed on September 24, 2024, and incorporates by reference the entire disclosure of the aforementioned patent application as part of the present application. TECHNICAL FIELD

[0003] The present application relates to the technical field of casting equipment, in particular to a pump-controlled crystallizer hydraulic vibration device and a continuous casting machine. BACKGROUND

[0004] The crystallizer hydraulic vibration device is a core device in the continuous casting machine equipment. Molten steel solidifies to form a casting blank in the crystallizer. The crystallizer is fixed on the vibration frame of the vibration device and reciprocates with the vibration frame. The vibration of the crystallizer is equivalent to the action of demolding, which aims to prevent the casting blank from sticking and causing cracks or leakage of molten steel, and also improves the surface quality of the casting blank. The specific implementation process is as follows: the crystallizer reciprocates, when the crystallizer moves upward, the adhesion between the new blank shell and the crystallizer is reduced; when the crystallizer moves downward, for a short period of time, its speed is slightly greater than the pulling speed, i.e. negative slip is formed, thereby generating a period of compressive stress process in the blank shell formation process, so as to compress the blank shell with a tendency to break in the crystallizer. The quality of the casting blank and the normal operation of the equipment are directly related to the stability, accuracy and vibration waveform of the crystallizer vibration.

[0005] The commonly used hydraulic vibration is hydraulic servo vibration, which is composed of a vibration unit, a driving hydraulic cylinder, a servo valve and a hydraulic pump station. The hydraulic servo vibration uses an electro-hydraulic servo valve to control the hydraulic cylinder to realize sinusoidal and non-sinusoidal vibration, which can conveniently realize online adjustment and monitoring of amplitude, frequency and waveform. However, due to the use of an electro-hydraulic servo valve, there are disadvantages such as high requirement for oil cleanliness, high construction and operation and maintenance cost, and low efficiency. SUMMARY

[0006] The purpose of the embodiments of the present application is to provide a pump-controlled crystallizer hydraulic vibration device and a continuous casting machine, which solves the problems of high requirement for oil cleanliness, high construction and operation and maintenance cost, and low efficiency of the electro-hydraulic servo valve in the current vibration device.

[0007] The above technical purposes of the embodiments of the present application are mainly realized by the following technical solutions:

[0008] In one aspect, the embodiment of the present application provides a pump-controlled crystallizer hydraulic vibration device, which comprises a connecting frame and at least one vibration unit arranged on the connecting frame. The vibration unit comprises a fixed frame, a vibration frame, a guide mechanism, and a driving mechanism for driving the vibration frame to vibrate up and down relative to the fixed frame. The fixed frame is connected to the connecting frame. The vibration frame is movably arranged in the fixed frame. The guide mechanism is connected between the fixed frame and the vibration frame. The driving mechanism has a housing connected to the fixed frame, and the housing is internally provided with a servo motor, a bidirectional hydraulic pump and a driving hydraulic cylinder connected in sequence. The cylinder rod of the driving hydraulic cylinder is connected to the vibration frame for driving the vibration frame to vibrate up and down.

[0009] The pump-controlled crystallizer hydraulic vibration device provided by the present application directly drives the bidirectional hydraulic pump with the servo motor to supply high-pressure oil to the driving hydraulic cylinder, and the reciprocating motion of the driving hydraulic cylinder is realized by commutation of the servo motor, thereby avoiding pressure loss of workshop pipelines and servo valves and having the advantage of saving electric energy.

[0010] The pump-controlled crystallizer hydraulic vibration device provided by the present application realizes integration of the hydraulic driving system in the driving mechanism, cancels the large hydraulic pump station system and servo valve in the existing product, eliminates the influence of oil cleanliness on vibration, avoids the problem of servo valve blockage, and improves production efficiency.

[0011] In an optional embodiment of the present application, the housing of the driving mechanism is internally provided with a cooling pipeline and an oil supplementing pipeline.

[0012] In the embodiment, cooling water is passed through the cooling pipeline to cool the servo motor, thereby effectively protecting the driving mechanism and improving the service life of the equipment; and hydraulic oil is passed through the oil supplementing pipeline to supplement oil in the oil circuit where the driving hydraulic cylinder is located.

[0013] In an optional embodiment of the present application, the vibration unit further comprises a vibration rod, one end of the vibration rod is connected to the vibration frame, and the other end of the vibration rod is connected to the cylinder rod of the driving hydraulic cylinder.

[0014] In the embodiment, the driving hydraulic cylinder is directly connected to the vibration frame through the vibration rod, and there is no hinge point, so that the transmission efficiency is high.

[0015] In an optional embodiment of the present application, the end of the vibration rod connected to the vibration frame is provided with a spherical gasket, and the vibration rod is matched with the vibration frame through the spherical gasket.

[0016] In the embodiment, the spherical gasket is arranged to allow the vibration rod and the vibration frame to have certain machining errors and assembly errors, which is beneficial to reduce production difficulty and cost.

[0017] In an optional embodiment of the present application, the guide mechanism comprises a long strip-shaped plate spring, two ends of the plate spring are connected with the vibrating frame, and the middle part of the plate spring is connected with the fixed frame.

[0018] In the embodiment, the vibrating frame can vibrate up and down relative to the fixed frame with elastic deformation of the plate spring.

[0019] In an optional embodiment of the present application, the fixed frame and the plate spring are positioned by positioning pins and connected by bolts, and / or the vibrating frame and the plate spring are positioned by positioning pins and connected by bolts.

[0020] In the embodiment, the positioning pins play a positioning role, facilitating subsequent fixation of the plate spring by bolts.

[0021] In an optional embodiment of the present application, the plate spring is arranged along the transverse direction of the connecting frame; and the vibrating unit comprises at least four groups of the guide mechanism, and the four groups of the guide mechanism are distributed in a cuboid shape.

[0022] In the embodiment, the plate springs in the four groups of guide mechanisms are respectively distributed at different positions of the four corners of the vibrating frame, which can improve the vibration precision of the vibrating frame and is beneficial to improving the quality of products.

[0023] In an optional embodiment of the present application, the fixed frame is provided with a mounting surface, a cylinder barrel of the driving hydraulic cylinder is fixed to the mounting surface, the extension direction of the driving hydraulic cylinder is perpendicular to the mounting surface, and the arrangement direction of the plate spring is parallel to the mounting surface.

[0024] In the embodiment, the mounting direction of the plate spring is perpendicular to the extension direction of the driving hydraulic cylinder, which is easy to process and mount, can better ensure the mounting precision, improve the vibration precision, and is beneficial to improving the quality of cast slabs.

[0025] In an optional embodiment of the present application, the pump-controlled mold hydraulic vibration device comprises two vibrating units, and the two vibrating units are distributed in a longitudinal direction of the connecting frame.

[0026] In the embodiment, one of the two vibrating units serves as an inner-arc vibrating unit, and the other serves as an outer-arc vibrating unit, so that an arc-imitating motion can be realized.

[0027] On the other hand, the embodiments of the present application also provide a continuous casting machine comprising a mold and a pump-controlled mold hydraulic vibration device as described above. The mold is mounted on the vibrating frame of the pump-controlled mold hydraulic vibration device.

[0028] The continuous casting machine described in the present application has the features and beneficial effects of the pump-controlled mold hydraulic vibration device described above, and will not be described again here. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to make the technical solutions in the present application or the prior art clearer, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. The drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings. The drawings described herein are for illustrative purposes only, and are not intended to limit the scope of the present application in any way. In addition, the shapes and scale sizes of the components in the drawings are only illustrative, and are used to help understand the present application, and are not specific limitations on the shapes and scale sizes of the components in the present application. Those skilled in the art can select various possible shapes and scale sizes to implement the present application according to specific circumstances under the guidance of the present application. In the drawings:

[0030] Fig. 1 is a structural schematic diagram of a pump-controlled mold hydraulic vibration device according to an embodiment of the present application;

[0031] Fig. 2 is a structural schematic diagram of a vibration unit according to an embodiment of the present application;

[0032] Fig. 3 is a structural schematic diagram of a driving mechanism according to an embodiment of the present application;

[0033] Fig. 4 is a sectional structural schematic diagram of a vibration unit according to an embodiment of the present application.

[0034] Explanation of reference numerals: 10, connecting frame; 11, vibration unit; 20, fixed frame; 21, vibration frame; 22, leaf spring; 23, mounting surface; 30, driving mechanism; 31, servo motor; 32, shaft coupling; 33, bidirectional hydraulic pump; 34, driving hydraulic cylinder; 35, mounting plate; 36, protective plate; 37, vibration rod; 38, spherical washer; 39, positioning pin. DETAILED DESCRIPTION

[0035] In order to make those skilled in the art better understand the technical solutions in the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0036] It is to be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar terms as used herein are for the purpose of description only and are not intended to limit the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0038] Embodiment one:

[0039] As shown in FIG. 1 to FIG. 4, the pump-controlled crystallizer hydraulic vibration device provided by the embodiments of the present application comprises a connecting frame 10 and at least one vibration unit 11 arranged on the connecting frame 10. The vibration unit 11 comprises a fixed frame 20, a vibrating frame 21, a guide mechanism, and a driving mechanism 30 for driving the vibrating frame 21 to vibrate up and down relative to the fixed frame 20. The fixed frame 20 is connected to the connecting frame 10. The vibrating frame 21 is movably arranged in the fixed frame 20. The guide mechanism is connected between the fixed frame 20 and the vibrating frame 21. The driving mechanism 30 has a housing connected to the fixed frame 20, and a servo motor 31, a bidirectional hydraulic pump 33 and a driving hydraulic cylinder 34 are sequentially connected in the housing. The cylinder rod of the driving hydraulic cylinder 34 is connected to the vibrating frame 21, and is used to drive the vibrating frame 21 to vibrate up and down.

[0040] The pump-controlled crystallizer hydraulic vibration device provided by the embodiments of the present application adopts the direct driving of the bidirectional hydraulic pump 33 by the servo motor 31 to supply high-pressure oil to the driving hydraulic cylinder 34, and the reciprocating motion of the driving hydraulic cylinder 34 is realized by the commutation of the servo motor 31, thereby avoiding the pressure loss of the workshop pipeline and the servo valve, and having the advantage of saving electric energy.

[0041] The pump-controlled crystallizer hydraulic vibration device provided by the embodiments of the present application realizes the integration of the hydraulic driving system in the driving mechanism 30, cancels the huge hydraulic pump station system and servo valve in the existing products, eliminates the influence of the oil cleanliness problem on the vibration, avoids the problem of servo valve blockage, and improves the production efficiency.

[0042] The specific structure of each part of the pump-controlled crystallizer hydraulic vibration device provided by the embodiments of the present application and the connection relationship between the parts will be described in detail below.

[0043] As shown in FIG. 1 and FIG. 4, the pump-controlled crystallizer hydraulic vibration device has a connecting frame 10 and a vibration unit 11, and the vibration unit 11 is installed on the connecting frame 10. The connecting frame 10 is a steel plate with a predetermined shape, and the vibration unit 11 can be connected to the connecting frame 10 by bolt connection.

[0044] Optionally, as shown in FIG. 4, two opposite vibration units 11 are installed on the connecting frame 10, and the two vibration units 11 are spaced apart along the longitudinal direction of the connecting frame 10. One of the two vibration units 11 is an inner arc vibration unit, and the other is an outer arc vibration unit, which can realize arc simulation motion. By making the amplitudes of the two vibration units 11 different, the arc simulation motion can be realized. The amplitude of the inner arc vibration unit is smaller than that of the outer arc vibration unit, that is, the vibration unit 11 with smaller amplitude is used as the inner arc vibration unit, and the vibration unit 11 with larger amplitude is used as the outer arc vibration unit 11.

[0045] As shown in FIG. 1, the vibration unit 11 includes a fixed frame 20, a vibration frame 21, a guide mechanism, and a driving mechanism 30. The fixed frame 20 is a cuboid structure composed of a steel plate, and the bottom of the fixed frame 20 is connected to the connecting frame 10 by bolt connection. The vibration frame 21 is arranged in the fixed frame 20 and is also composed of a steel plate.

[0046] Further, the driving mechanism 30 is installed at the bottom of the fixed frame 20, and the driving hydraulic cylinder 34 in the driving mechanism 30 is connected to the vibration frame 21. Under the driving of the driving hydraulic cylinder 34 and the guidance of the guide mechanism, the vibration frame 21 can vibrate up and down relative to the fixed frame 20.

[0047] As shown in FIG. 3, the driving mechanism 30 includes a housing, a servo motor 31, a bidirectional hydraulic pump 33, and a driving hydraulic cylinder 34. The housing is composed of a mounting plate 35 and a protective plate 36, the mounting plate 35 is connected to the fixed frame 20 by bolt connection, and a mounting space is formed between the mounting plate 35 and the protective plate 36. The servo motor 31, the bidirectional hydraulic pump 33, and the driving hydraulic cylinder 34 are arranged in the mounting space. The output shaft of the servo motor 31 is connected to the bidirectional hydraulic pump 33 through a shaft coupling 32, which is used to drive the bidirectional hydraulic pump 33 to rotate and output high-pressure oil pressure. The bidirectional hydraulic pump 33 is connected to the driving hydraulic cylinder 34 through a pipeline, thereby realizing the extension and retraction of the cylinder rod of the driving hydraulic cylinder 34. The output end of the cylinder rod is connected to the vibration frame 21, so as to drive the vibration frame 21 to vibrate up and down.

[0048] The specific structure and technical effects of the preferred embodiment of the pump-controlled crystallizer hydraulic vibration device will be further described below.

[0049] According to one embodiment of the present application, the shell of the driving mechanism 30 is provided with a cooling pipeline and an oil supplement pipeline.

[0050] The continuous-casting machine environment of a steel plant is high temperature and high humidity, and the temperature is usually over 80°, and during the casting process, the servo motor 31 needs to be continuously rotated for a long time, so cooling water is passed through the cooling pipeline to cool the servo motor 31, which can effectively protect the driving mechanism 30 and improve the service life of the equipment; the hydraulic oil passed through the oil supplement pipeline can supplement the oil in the oil circuit where the driving hydraulic cylinder 34 is located.

[0051] According to one embodiment of the present application, as shown in FIG. 3, the vibration unit 11 further includes a vibration rod 37, one end of the vibration rod 37 is connected with the vibration frame 21, and the other end of the vibration rod 37 is connected with the cylinder rod of the driving hydraulic cylinder 34. The driving hydraulic cylinder 34 is directly connected with the vibration frame 21 through the vibration rod 37, and there is no hinge point, so the transmission efficiency is high.

[0052] Specifically, the lower part of the vibration rod 37 is provided with an internal thread, the cylinder rod of the driving hydraulic cylinder 34 is provided with an external thread, and the two are screwed together. The upper part of the vibration rod 37 is provided with an external thread, which is screwed with a nut to be fixed with the vibration frame 21.

[0053] Further, as shown in FIG. 3, the end of the vibration rod 37 connected with the vibration frame 21 is provided with a spherical washer 38, and the vibration rod 37 is matched with the vibration frame 21 through the spherical washer 38. By arranging the spherical washer 38, a certain machining error and assembly error between the vibration rod 37 and the vibration frame 21 is allowed, which is beneficial to reduce the production difficulty and cost.

[0054] According to one embodiment of the present application, as shown in FIG. 1 and FIG. 3, the guide mechanism includes a long strip-shaped plate spring 22, both ends of the plate spring 22 are connected with the vibration frame 21, and the middle part of the plate spring 22 is connected with the fixed frame 20. The vibration frame 21 moves up and down under the driving of the driving hydraulic cylinder 34, and the plate spring 22 elastically deforms.

[0055] According to one embodiment of the present application, as shown in FIG. 1 and FIG. 3, the fixed frame 20 and the plate spring 22 are positioned by a positioning pin 39 and connected by a bolt, and / or the vibration frame 21 and the plate spring 22 are positioned by the positioning pin 39 and connected by the bolt. The positioning pin 39 plays a positioning role, which is convenient for subsequent fixation of the plate spring 22 by the bolt.

[0056] Specifically, the fixed frame 20 and the leaf spring 22 are connected through the positioning pin 39 and the bolt, the middle part of the leaf spring 22 is provided with a vertical through hole, the positioning pin 39 is arranged in the vertical direction and passes through the vertical through hole on the leaf spring 22; the fixed frame 20 is provided with a positioning hole, the positioning pin 39 is matched with the positioning hole on the fixed frame 20 at the same time, and the positioning pin 39 plays a positioning role; then the leaf spring 22 and the fixed frame 20 are connected through the bolt.

[0057] The vibration frame 21 and the leaf spring 22 are connected through the positioning pin 39 and the bolt, the two ends of the leaf spring 22 are provided with vertical through holes, the positioning pin 39 is arranged in the vertical direction and passes through the vertical through hole on the leaf spring 22; the vibration frame 21 is provided with a positioning hole, the positioning pin 39 is matched with the positioning hole on the vibration frame 21 at the same time, and the positioning pin 39 plays a positioning role; then the leaf spring 22 and the vibration frame 21 are connected through the bolt.

[0058] According to one embodiment of the present application, as shown in FIG. 1 and FIG. 3, the leaf spring 22 is arranged along the transverse direction of the connecting frame 10; the vibration unit 11 at least includes four groups of guide mechanisms, and the four groups of guide mechanisms are distributed in the shape of a cuboid. The leaf springs 22 in the four groups of guide mechanisms are respectively distributed at different positions of the four corners of the vibration frame 21, which can improve the vibration precision of the vibration frame 21 and is conducive to improving the quality of products.

[0059] Specifically, the leaf springs 22 in the four groups of guide mechanisms are arranged along the four parallel edges of the cuboid, two groups of guide mechanisms are arranged above, two groups of guide mechanisms are arranged below, and each group of guide mechanisms can include two leaf springs 22, and a gap is reserved between the two leaf springs 22.

[0060] According to one embodiment of the present application, as shown in FIG. 3, the fixed frame 20 is provided with a mounting surface 23, the cylinder barrel of the driving hydraulic cylinder 34 is fixed to the mounting surface 23, the extension direction of the driving hydraulic cylinder 34 is perpendicular to the mounting surface 23, and the arrangement direction of the leaf spring 22 is parallel to the mounting surface 23. The mounting direction of the leaf spring 22 is perpendicular to the extension direction of the driving hydraulic cylinder 34, which is easy to process and install, can better ensure the installation precision, improves the vibration precision, and is conducive to improving the quality of the cast slab. Preferably, the mounting surface 23 is in the horizontal direction.

[0061] Embodiment two:

[0062] The present application also provides a continuous casting machine, which comprises a crystallizer and the pump-controlled crystallizer hydraulic vibration device as described in the embodiment one, and the crystallizer is installed on the vibration frame 21 of the pump-controlled crystallizer hydraulic vibration device.

[0063] The continuous casting machine has the characteristics and beneficial effects of the pump-controlled crystallizer hydraulic vibration device described above, and details are not repeated here.

[0064] The above-described specific embodiments have further detailed the purposes, technical solutions and beneficial effects of the present application, and it should be understood that the above-described is only a specific embodiment of the present application and is not used to limit the protection scope of the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pump controlled crystallizer hydraulic vibration apparatus, wherein, The vibration unit (11) comprises: A fixed frame (20) connected to the connecting frame (10); A vibration frame (21) movably arranged in the fixed frame (20); A guide mechanism connected between the fixed frame (20) and the vibration frame (21); A driving mechanism (30) for driving the vibration frame (21) to vibrate up and down relative to the fixed frame (20), the driving mechanism (30) has a housing connected to the fixed frame (20), and the housing is provided with a servo motor (31), a bidirectional hydraulic pump (33) and a driving hydraulic cylinder (34) connected in sequence, and the cylinder rod of the driving hydraulic cylinder (34) is connected to the vibration frame (21) for driving the vibration frame (21) to vibrate up and down.

2. The pump controlled mold hydraulic oscillation apparatus of claim 1 wherein, The housing of the driving mechanism (30) is provided with a cooling pipeline and an oil supplementing pipeline.

3. The pump box hydraulic vibration apparatus of claim 1, wherein, The vibration unit (11) further comprises a vibration rod (37), one end of the vibration rod (37) is connected to the vibration frame (21), and the other end of the vibration rod (37) is connected to the cylinder rod of the driving hydraulic cylinder (34).

4. The pump controlled mold hydraulic oscillation apparatus of claim 3 wherein, The end of the vibration rod (37) connected to the vibration frame (21) is provided with a spherical washer (38), and the vibration rod (37) is matched with the vibration frame (21) through the spherical washer (38).

5. The pump-action crystallizer hydraulic vibration apparatus of any one of claims 1 to 4, wherein, The guide mechanism comprises an elongated plate spring (22), both ends of the plate spring (22) are connected to the vibration frame (21), and the middle part of the plate spring (22) is connected to the fixed frame (20).

6. The pump box hydraulic vibration apparatus of claim 5, wherein, The fixed frame (20) and the plate spring (22) are positioned by a positioning pin (39) and connected by a bolt, and / or the vibration frame (21) and the plate spring (22) are positioned by a positioning pin (39) and connected by a bolt.

7. The pump-action mould hydraulic vibrating device according to claim 5 or 6, wherein, The plate spring (22) is arranged along the transverse direction of the connecting frame (10); the vibration unit (11) comprises at least four groups of the guide mechanism, and the four groups of the guide mechanism are distributed in the shape of a cuboid.

8. The pump box hydraulic vibration apparatus of claim 5 wherein, The fixed frame (20) is provided with a mounting surface (23), the cylinder barrel of the driving hydraulic cylinder (34) is fixed to the mounting surface (23), the extension direction of the driving hydraulic cylinder (34) is perpendicular to the mounting surface (23), and the arrangement direction of the plate spring (22) is parallel to the mounting surface (23).

9. The pump box hydraulic vibration apparatus of any one of claims 1 to 4, wherein, The pump-controlled crystallizer hydraulic vibration device comprises two vibration units (11), and the two vibration units (11) are arranged in the longitudinal direction of the connecting frame (10) and are spaced apart.

10. A continuous caster wherein, The pump-controlled crystallizer hydraulic vibration device comprises: A crystallizer; The pump-controlled crystallizer hydraulic vibration device according to any one of claims 1 to 9, wherein the crystallizer is mounted on the vibration frame (21) of the pump-controlled crystallizer hydraulic vibration device.

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