Precise flow control bit equipment and method of using same

Abstract

The present application relates to a kind of precision flow control bit equipment and its use method, the equipment includes liquid flow monitoring device, liquid flow control device and controller, by servo closed-loop control system realizes flow, flow control and steady flow.Liquid flow monitoring device includes liquid level balancing device, position sensor, high temperature flow detection device, for monitoring the liquid level height in chute.Liquid flow control device includes inclined wedge graphite plug, flow control rod, servo drive device etc., adjust the size of flow passage opening, to achieve the purpose of precision flow control.The use method of the present application compares and analyzes the feedback of liquid flow balancing device in real time by controller, adjusts servo motor, until liquid level reaches new dynamic balance, maintains stable production quality and reliability.The present application can stabilize the balance state of liquid level in real time while realizing the accurate control of liquid flow, and can dynamically correct unbalanced state in real time.

Description

Technical Field

[0001] This invention belongs to the field of casting and rolling production technology, and relates to a precision flow control and positioning equipment and its usage method. Background Technology

[0002] In high-speed casting and rolling production, high production speed and efficiency are required. The mass of molten aluminum flowing out per unit time is large and the temperature is high. Therefore, an efficient liquid supply system and precise liquid control capability are necessary to meet the production requirements of liquid supply and flow control per unit time.

[0003] Existing casting and rolling mills are all conventional, characterized by low casting speeds, low production efficiency, inefficient liquid supply systems, and low precision in flow and position control. Therefore, existing liquid flow control systems cannot meet the requirements of high-speed casting and rolling processes. Consequently, it is necessary to improve the flow injection system, increase production efficiency, enhance the production capacity of the casting system, and improve the precision of liquid flow control, necessitating a radical overhaul of the liquid control device.

[0004] In aluminum strip casting and rolling production, the stability of the molten aluminum surface directly affects the quality and reliability of the production, and is also a fundamental prerequisite for ensuring that the molten aluminum does not overflow in the casting area. However, the current conventional casting and rolling production methods, which use float leveling and auxiliary stopper rods to control the flow, have low level control capability, poor accuracy, and low flow rate, and cannot meet the requirements of high-speed casting and rolling production. With the continuous development of new high-speed casting and rolling production technologies, it will become possible to produce high-strength alloy aluminum using high-speed casting and rolling in the future. Therefore, improving the various key devices in high-speed casting and rolling production, enhancing the performance of each main piece of equipment, and innovating new flow and position control devices are of great significance and are also urgent requirements for the future development of high-speed casting and rolling production technology. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a precise flow control and positioning device and its usage method to solve the problems of insufficient flow control capability, low hydraulic control accuracy, low flow channel efficiency, slow control response speed, and easy blockage of the flow channel in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A precision flow control and positioning device includes a liquid flow monitoring device installed on a chute below the flow channel of a melting furnace, a liquid flow control device installed on the flow channel for controlling the size of the flow channel opening, and a controller.

[0008] The liquid flow monitoring device includes a liquid level balancing device, a position sensor, and a high-temperature flow detection device. The high-temperature flow detection device is located in the chute and is used to measure the flow rate. One end of the liquid level balancing device is located in the chute and is in contact with the molten metal in the chute. The other end is equipped with the position sensor, which monitors the liquid level height in the chute by detecting the position change of the liquid level balancing device.

[0009] The position sensor, high-temperature flow detection device, and liquid flow control device are all connected to the controller. The controller controls the size of the gate opening through the liquid flow control device based on the flow and liquid level information fed back by the position sensor and high-temperature flow detection device.

[0010] Furthermore, the liquid level balancing device includes a liquid level detector, an adjusting rod, a balance beam, a balance hinge joint, a multi-functional induction plate, and a support;

[0011] The balancing hinge joint is fixedly mounted on the support, and the balancing beam is mounted on the balancing hinge joint. The liquid level detector is located inside the chute and is connected to one end of the balancing beam via an adjusting rod. The multifunctional sensing plate is mounted on the other end of the balancing beam. Under the action of the liquid level detector and the multifunctional sensing plate, the balancing beam forms a lever balance structure with the balancing hinge joint as the fulcrum. The position sensor is fixedly mounted on the support and located on one side of the multifunctional sensing plate to monitor the positional changes of the multifunctional sensing plate.

[0012] Furthermore, the balance beam is also equipped with a counterweight.

[0013] Furthermore, the fluid flow control device includes a wedge graphite plug, a flow control rod, an adjusting pin, a support hinge, a locking spring, a support arm, a clutch swing arm, and a servo drive device;

[0014] The wedge-shaped graphite plug is fixedly mounted on one end of the flow control rod and inserted into the flow channel. The end of the flow control rod away from the wedge-shaped graphite plug is hinged to the clutch swing arm via a support hinge joint. One end of the support arm is rotatably connected to the chute, and the other end is rotatably connected to the middle section of the clutch swing arm. One end of the locking spring is connected to the end of the support arm away from the clutch swing arm, and the other end is connected to the clutch swing arm, with the connection point located between the support hinge joint and the support arm. The end of the clutch swing arm away from the support hinge joint is connected to a servo drive device. The servo drive device drives the clutch swing arm to move along its own axis while swinging, thereby driving the wedge-shaped graphite plug to make linear motion through the flow control rod, adjusting the size of the flow channel opening.

[0015] Furthermore, the servo drive device includes a servo motor, a precision rack, a precision gear, a coupling arm, a coupling disk, and a slider;

[0016] The coupling disk is fixedly connected to the servo motor. The coupling disk has a groove that is eccentric to the servo motor shaft. The slider is slidably disposed in the groove. The coupling arm is slidably disposed on the servo motor shaft. The precision rack is fixedly disposed on the clutch swing arm along the axial direction. The precision gear is rotatably disposed at one end of the coupling arm through a connecting rod and meshes with the precision rack. The other end of the coupling arm is hinged to the slider. The servo motor drives the coupling arm to swing, and at the same time, the coupling arm slides along its own axial direction under the action of the slider and the groove. The precision gear and the precision rack drive the clutch swing arm.

[0017] Furthermore, the flow control rod is provided with a high-temperature resistant coating.

[0018] Furthermore, the servo motor is fixedly mounted on the base.

[0019] A method for using the precision flow control and positioning equipment as described above: the flow balancing device, the flow detection device, and the flow control device form a servo closed-loop control system to achieve flow measurement, flow control, and flow stabilization; when the servo drive device is initially adjusted to a certain balance state, it is recorded as the reference zero position. At this time, the balance position of the displacement sensor of the flow balancing device is recorded as the initial balance of the system. When the system deviates from the balance position, the servo drive device and the flow balancing device perform interlocking detection and drive to form a stable balance system.

[0020] When the liquid flow balancing device sends an imbalance signal to the controller, the controller immediately performs real-time comparative analysis and calculates the rotation direction and feed amount of the servo motor. At the same time, it triggers the controller command to drive the servo motor to rotate and adjust, causing the liquid flow control device to move to increase or decrease the liquid flow until the liquid level reaches a new dynamic balance, thus causing the liquid flow balancing device to maintain a new state of balance.

[0021] Furthermore, the target flow rate Q controlled by the fluid flow control device satisfies the following control equation:

[0022] In the formula:

[0023]

[0024] C v - is the flow velocity coefficient, taking into account structural resistance;

[0025] x represents the displacement of the flow control rod, in meters (m).

[0026] δ - is the taper of the designed flow channel and graphite plug, in degrees;

[0027] H represents the depth of the molten aluminum pool from the center of the outlet, in meters (m).

[0028] Furthermore, the servo drive device controls the rotational displacement of the coupling arm in real time to promote system balance. The coupling arm and the clutch swing arm satisfy the following rotational relationship:

[0029]

[0030] In the formula:

[0031] β- is the angle of rotation of the line connecting the hinge point of the flow control rod and the clutch lever to the meshing point of the precision gear and the precision rack, in degrees;

[0032] α - is the rotation angle of the coupling arm, in degrees;

[0033] K- is the coupling coefficient, which is determined by the mechanism structure;

[0034] x represents the displacement of the flow control rod, in meters (m).

[0035] R x - is the length of the hinge point and the meshing point of the precision gear and precision rack, in meters.

[0036] The beneficial effects of this invention are as follows:

[0037] This invention organically matches the device with the flow rate designed for process production, enabling precise control of the liquid flow rate while maintaining a stable liquid level balance in real time and dynamically correcting any imbalances. The liquid flow detection device determines the liquid flow rate, while the liquid flow control device stabilizes and balances the liquid level. These two components are organically combined via a servo drive and connected using a coupling system. The system offers stable and reliable control, high precision, and broad applicability.

[0038] This invention can accurately and dynamically control the flow rate of molten aluminum, correct the flow rate in real time, and maintain a stable flow pattern. By linking these three aspects, an effective production control strategy is achieved, solving a long-standing problem in high-speed casting and rolling production. It has significant application value in controlling and stabilizing large flow channels and high flow rates, and can meet the requirements of high-speed casting and rolling production in terms of speed, output, and quality.

[0039] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0040] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0041] Figure 1 This is a front view schematic diagram of the precision flow control and positioning equipment in this invention.

[0042] Figure 2 This is a side view of the precision flow control and positioning device of the present invention.

[0043] Figure 3 This is a cross-sectional view of the precision flow control and positioning equipment in this invention.

[0044] Figure 4 This is a cross-sectional view of the precision flow control and positioning equipment in this invention.

[0045] Figure 5 This is a KK cross-sectional schematic diagram of the precision flow control and positioning equipment in this invention.

[0046] Figure 6 This is a cross-sectional schematic diagram of the TT precision flow control and positioning device in this invention.

[0047] Figure 7 This is a schematic diagram illustrating the mechanism of the precise flow control and positioning equipment of the present invention.

[0048] Figure 8 This is a control principle diagram of the precise flow control and positioning equipment of the present invention.

[0049] Reference numerals: 1-Wedge graphite plug; 2-Flow control rod; 3-Adjusting pin; 4-Support hinge joint; 5-Locking spring; 6-Support arm; 7-Clutch swing arm; 8-Slider; 9-Support; 10-Connecting rod; 11-Coupled disc; 12-Servo motor; 13-Level detector; 14-Adjusting rod; 15-Balance beam; 16-Balanced light hinge joint; 17-Counterweight; 18-Position sensor; 19-Multifunctional induction plate; 20-High temperature flow detection device; 21-Precision rack; 22-Precision gear; 23-Coupled arm. Detailed Implementation

[0050] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0051] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0052] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0053] Please see Figures 1-6 It is a precision flow control and positioning equipment, including a liquid flow monitoring device installed on the chute below the flow channel of the melting furnace, a liquid flow control device installed on the flow channel and used to control the size of the flow channel opening, and a controller;

[0054] The liquid flow monitoring device includes a liquid level balancing device, a position sensor 18, and a high-temperature flow detection device 20. The high-temperature flow detection device 20 is installed in the chute and is used to measure the flow rate. One end of the liquid level balancing device is located in the chute and is in contact with the molten metal in the chute. The other end is equipped with a position sensor 18. The position sensor 18 monitors the liquid level height in the chute by detecting the position change of the liquid level balancing device.

[0055] The position sensor 18, the high-temperature flow detection device 20, and the liquid flow control device are all connected to the controller. The controller controls the size of the flow channel opening through the liquid flow control device based on the flow and liquid level information fed back by the position sensor 18 and the high-temperature flow detection device 20.

[0056] The liquid level balancing device includes a liquid level detector 13, an adjusting rod 14, a balance beam 15, a balance hinge joint 16, a multi-functional induction plate 19, and a support 9.

[0057] A balance hinge joint 16 is fixedly mounted on the support 9, and a balance beam 15 is mounted on the balance hinge joint 16. A level detector 13 is located inside the chute and is connected to one end of the balance beam 15 via an adjusting rod 14. A multi-functional sensing plate 19 is mounted on the other end of the balance beam 15. Under the action of the level detector 13 and the multi-functional sensing plate 19, the balance beam 15 forms a lever balance structure with the balance hinge joint 16 as the fulcrum. A position sensor 18 is fixedly mounted on the support 9 and located on one side of the multi-functional sensing plate 19 to monitor the position changes of the multi-functional sensing plate 19.

[0058] The balance beam 15 is also equipped with a counterweight 17, which is used to set the initial balance conditions.

[0059] The fluid flow control device includes a wedge graphite plug 1, a flow control rod 2, an adjusting pin 3, a support hinge joint 4, a locking spring 5, a support arm 6, a clutch swing arm 7, and a servo drive device.

[0060] A wedge-shaped graphite plug 1 is fixedly installed at one end of the flow control rod 2 and inserted into the flow channel. The flow control rod 2 is coated with a high-temperature resistant coating. The end of the flow control rod 2 away from the wedge-shaped graphite plug 1 is hinged to the clutch swing arm 7 via a support hinge joint 4. One end of the support arm 6 is rotatably connected to the chute, and the other end is rotatably connected to the middle section of the clutch swing arm 7. One end of the locking spring 5 is connected to the end of the support arm 6 away from the clutch swing arm 7, and the other end is connected to the clutch swing arm 7, with the connection point located between the support hinge joint 4 and the support arm 6. The end of the clutch swing arm 7 away from the support hinge joint 4 is connected to a servo drive device. The servo drive device drives the clutch swing arm 7 to move along its own axis while swinging, thereby driving the wedge-shaped graphite plug 1 to make linear motion through the flow control rod 2, adjusting the size of the flow channel opening.

[0061] The servo drive device includes a servo motor 12, a precision rack 21, a precision gear 22, a coupling arm 23, a coupling disk 11, and a slider 8;

[0062] The servo motor 12 is fixedly mounted on the base, and the coupling disk 11 is fixedly mounted on the servo motor 12. The coupling disk 11 is provided with a groove that is eccentric to the rotating shaft of the servo motor 12. The slider 8 is slidably mounted in the groove. The coupling arm 23 is slidably mounted on the rotating shaft of the servo motor 12. The precision rack 21 is fixedly mounted on the clutch swing arm 7 along the axial direction. The precision gear 22 is rotatably mounted on one end of the coupling arm 23 through the connecting rod 10 and meshes with the precision rack 21. The other end of the coupling arm 23 is hinged to the slider 8. The servo motor 12 drives the coupling arm 23 to swing. At the same time, the coupling arm 23 slides along its own axial direction under the action of the slider 8 and the groove. The precision gear 22 and the precision rack 21 work together to drive the clutch swing arm 7.

[0063] In this embodiment, the smelting furnace can be a heating furnace or a holding furnace.

[0064] Please see Figure 7 , 8 In this embodiment, the precise flow control and positioning equipment is used in a way that the flow balancing device, the flow detection device, and the flow control device form a servo closed-loop control system to achieve flow measurement, flow control, and flow stabilization. When the servo drive device is initially adjusted to a certain balance state, it is recorded as the reference zero position. At this time, the balance position of the displacement sensor of the flow balancing device is recorded as the initial balance of the system. When the system deviates from the balance position, the servo drive device and the flow balancing device perform interlocking detection and drive to form a stable balance system.

[0065] When the liquid flow balancing device sends an imbalance signal to the controller, the controller immediately performs real-time comparative analysis and calculates the rotation direction and rotational feed of the servo motor 12. At the same time, it triggers the controller command to drive the servo motor 12 to rotate and adjust, causing the liquid flow control device to move to increase or decrease the liquid flow until the liquid level reaches a new dynamic balance, thus causing the liquid flow balancing device to maintain a new state balance.

[0066] The target flow rate Q controlled by the flow control device satisfies the following control equation:

[0067]

[0068] In the formula:

[0069] C v - is the flow velocity coefficient, taking into account structural resistance;

[0070] x represents the displacement of the flow control rod 2, in meters.

[0071] δ - is the taper of the designed flow channel and graphite plug, in degrees;

[0072] H represents the depth of the molten aluminum pool from the center of the outlet, in meters (m).

[0073] The servo drive device controls the rotational displacement of the coupling arm 23 in real time to ensure system balance. The coupling arm 23 and the clutch swing arm 7 satisfy the following rotational relationship:

[0074]

[0075] In the formula:

[0076] β- is the angle of rotation of the line connecting the hinge point of the flow control rod 2 and the clutch swing arm 7 with the meshing point of the precision gear 22 and the precision rack 21, in degrees;

[0077] α - is the rotation angle of coupling arm 23, in degrees;

[0078] K- is the coupling coefficient, which is determined by the mechanism structure;

[0079] x represents the displacement of the flow control rod 2, in meters (m).

[0080] R x - is the length of the hinge point and the meshing point of the precision gear 22 and the precision rack 21, in meters.

[0081] This invention combines flow measurement, flow control, and flow stabilization to form a closed-loop stable balance regulation, which can enhance the flow control capability of aluminum liquid production, accurately control the flow rate of the outlet aluminum liquid, and maintain the stability of the outlet liquid flow, thereby achieving the control function of efficient and high-speed production.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A precision flow control and positioning device, characterized in that: It includes a liquid flow monitoring device installed on a chute below the flow channel of the smelting furnace, a liquid flow control device installed on the flow channel and used to control the size of the flow channel opening, and a controller; The liquid flow monitoring device includes a liquid level balancing device, a position sensor, and a high-temperature flow detection device. The high-temperature flow detection device is located in the chute and is used to measure the flow rate. One end of the liquid level balancing device is located in the chute and is in contact with the molten metal in the chute. The other end is equipped with the position sensor, which monitors the liquid level height in the chute by detecting the position change of the liquid level balancing device. The position sensor, high-temperature flow detection device, and liquid flow control device are all connected to the controller. The controller controls the size of the gate opening through the liquid flow control device based on the flow and liquid level information fed back by the position sensor and high-temperature flow detection device. The liquid level balancing device includes a liquid level detector, an adjusting rod, a balance beam, a balance hinge joint, a multi-functional induction plate, and a support. The balancing hinge joint is fixedly mounted on the support, and the balancing beam is mounted on the balancing hinge joint. The liquid level detector is located inside the chute and is connected to one end of the balancing beam via an adjusting rod. The multifunctional sensing plate is mounted on the other end of the balancing beam. Under the action of the liquid level detector and the multifunctional sensing plate, the balancing beam forms a lever balance structure with the balancing hinge joint as the fulcrum. The position sensor is fixedly mounted on the support and located on one side of the multifunctional sensing plate to monitor the positional changes of the multifunctional sensing plate. The fluid flow control device includes a wedge graphite plug, a flow control rod, an adjusting pin, a support hinge, a locking spring, a support arm, a clutch swing arm, and a servo drive device. The wedge-shaped graphite plug is fixedly mounted on one end of the flow control rod and inserted into the flow channel. The end of the flow control rod away from the wedge-shaped graphite plug is hinged to the clutch swing arm via a support hinge joint. One end of the support arm is rotatably connected to the chute, and the other end is rotatably connected to the middle section of the clutch swing arm. One end of the locking spring is connected to the end of the support arm away from the clutch swing arm, and the other end is connected to the clutch swing arm, with the connection point located between the support hinge joint and the support arm. The end of the clutch swing arm away from the support hinge joint is connected to a servo drive device. The servo drive device drives the clutch swing arm to move along its own axis while swinging, thereby driving the wedge-shaped graphite plug to make linear motion through the flow control rod and adjusting the size of the flow channel opening. The servo drive device includes a servo motor, a precision rack, a precision gear, a coupling arm, a coupling disk, and a slider; The coupling disk is fixedly connected to the servo motor. The coupling disk has a groove that is eccentric to the servo motor shaft. The slider is slidably disposed in the groove. The coupling arm is slidably disposed on the servo motor shaft. The precision rack is fixedly disposed on the clutch swing arm along the axial direction. The precision gear is rotatably disposed at one end of the coupling arm through a connecting rod and meshes with the precision rack. The other end of the coupling arm is hinged to the slider. The servo motor drives the coupling arm to swing, and at the same time, the coupling arm slides along its own axial direction under the action of the slider and the groove. The precision gear and the precision rack drive the clutch swing arm.

2. The precision flow control and positioning equipment according to claim 1, characterized in that: The balance beam is also equipped with a counterweight.

3. The precision flow control and positioning equipment according to claim 1, characterized in that: The flow control rod is coated with a high-temperature resistant coating.

4. The precision flow control and positioning equipment according to claim 1, characterized in that: The servo motor is fixedly mounted on the base.

5. A method of using the precision flow control and positioning equipment as described in claim 1, characterized in that: The fluid flow balancing device, fluid flow detection device, and fluid flow control device form a servo closed-loop control system to achieve flow measurement, flow control, and flow stabilization. When the servo drive device is initially adjusted to a certain equilibrium state, it is recorded as the reference zero position. At this time, the equilibrium position of the displacement sensor of the fluid flow balancing device is recorded as the initial equilibrium of the system. When the system deviates from the equilibrium position, the servo drive device and the fluid flow balancing device perform interlocking detection and drive to form a stable equilibrium system. When the liquid flow balancing device sends an imbalance signal to the controller, the controller immediately performs real-time comparative analysis and calculates the rotation direction and feed amount of the servo motor. At the same time, it triggers the controller command to drive the servo motor to rotate and adjust, causing the liquid flow control device to move to increase or decrease the liquid flow until the liquid level reaches a new dynamic balance, thus causing the liquid flow balancing device to maintain a new state of balance.

6. The method of using the precision flow control and positioning equipment according to claim 5, characterized in that: The target flow rate controlled by the flow control device The following governing equations must be satisfied: In the formula: - is the flow velocity coefficient, taking into account structural resistance; - represents the displacement of the flow control rod, in meters (m). - The taper for designing flow channels and graphite plugs, in degrees; H represents the depth of the molten aluminum pool from the center of the outlet, in meters (m).

7. The method of using the precision flow control and positioning equipment according to claim 6, characterized in that: The servo drive device controls the rotational displacement of the coupling arm in real time to promote system balance. The coupling arm and the clutch swing arm satisfy the following rotational relationship: In the formula: - The angle of rotation of the line connecting the hinge point of the flow control lever and the clutch lever arm to the meshing point of the precision gear and the precision rack, in degrees; - is the rotation angle of the coupling arm, in degrees; - is the coupling coefficient, which is determined by the mechanism structure; - represents the displacement of the flow control rod, in meters (m). - is the length of the hinge point and the meshing point of the precision gear and precision rack, in meters.

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