Slag adding state detection device of continuous casting slag adding machine

Abstract

A slag feeding state detection device for a continuous casting slag feeding machine belongs to the technical field of continuous casting slag feeding and comprises a slag conveying pipeline for conveying casting powder into a crystallizer, the slag conveying pipeline comprises a feeding port, a discharging port and an air suction port which are communicated, a pressure difference detection component is mounted at the air suction port, and the pressure difference detection component is connected with the discharging port. The pressure difference detection part is connected with a prompting unit for prompting slag blockage or empty conveying through a control unit; the utility model has the beneficial effects that the device is simple in structure and low in manufacturing cost, and can timely detect the blockage and empty conveying of the pipeline of the slag adding machine, avoid the situation that the covering of the covering slag in the crystallizer is insufficient, and prevent the production accidents caused by the situation.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous casting slag adding, in particular to a slag adding state detection device for a continuous casting slag adding machine. Background Art

[0002] With the continuous advancement of continuous casting technology, the degree of automation is becoming more and more perfect. In order to reduce the workload of operators, achieve the goal of reducing staff and increasing efficiency, and ensure that the crystallizer casting slag is added less, more frequently, and more evenly, the continuous casting machine is equipped with an automatic slag feeder. During the process of adding casting slag, there is still a phenomenon of casting slag blockage. If it is not discovered in time, the lack of casting slag in the crystallizer is likely to cause bonding and leakage accidents. In addition, there may be slag feeder failures and empty suction.

[0003] For example, the patent with publication number CN206704958U discloses an automatic anti-blocking device for the discharge port, which consists of three parts: a detection system, an anti-blocking system and an alarm system; the first part of the detection system includes a belt discharge machine, a flap adjustment bracket, a movable flap, a limit switch, a rotating shaft, a guide rod, a flap valve and a soft rope, and the second part of the anti-blocking system includes a vibrating motor, and a vibrating motor is provided on the discharge pipe of the belt discharge machine; the third part of the alarm system includes a DCS distributed control system. The above anti-blocking device can observe and monitor the transportation of materials in real time. In the case of material blockage, it can be automatically vibrated to eliminate the blockage. However, the above patent cannot detect the failure of the material conveying equipment and the situation where the material is not conveyed. Moreover, after the pipeline is blocked, a large amount of material pushes the movable flap to rotate to trigger the blocking signal. The movable flap rotates back and forth for a long time, and some materials may be stuck, making it difficult for the movable flap to rotate, which may further cause blocking, and the reliability of the work is poor.

[0004] Therefore, how to detect and handle the problem in time when the protective slag is blocked or sucked out, and ensure the uninterrupted addition of slag into the crystallizer is a problem to be solved at present. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a slag feeding status detection device for a continuous casting slag feeder, which has a simple structure and low manufacturing cost. It can timely detect blockage and empty delivery of the slag feeder pipeline, avoid insufficient coverage of protective slag in the crystallizer, and prevent production accidents caused thereby.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model to solve its technical problem is: the slag feeding status detection device of the continuous casting slag feeding machine includes a slag conveying pipeline for conveying protective slag into the crystallizer, and the slag conveying pipeline includes an inlet, a discharge port and an air intake port that are interconnected. A pressure difference detection component is installed at the air intake port, and the pressure difference detection component is connected to a prompt unit for prompting slag blockage or empty delivery through a control unit.

[0007] The slag conveying pipeline is configured as a three-way pipe, including a conveying pipe I and a conveying pipe II that are connected.

[0008] The conveying pipe I is configured as a horizontal pipe, the lower side of the conveying pipe I is connected to the conveying pipe II, and the angle between the central axis of the conveying pipe II and the conveying pipe I is an acute angle or an obtuse angle.

[0009] The feeding port is arranged at one end of the conveying pipe I, and the air inlet is arranged at the other end of the conveying pipe I; the discharging port is arranged at the end of the conveying pipe II away from the conveying pipe I.

[0010] An air suction pipe is arranged at one end of the conveying pipe I away from the feed port, and conical holes are arranged relatively inside the air suction pipe, and the apertures at both ends of the air suction pipe are larger than the aperture inside.

[0011] The air intake pipe is also provided with a pressure measuring tube in communication therewith, and the pressure measuring tube is connected to the pressure difference detection component through an air pipe.

[0012] The delivery pipe I includes a cylindrical section and a conical section, and the cylindrical section is connected to the intake pipe through the conical section; the aperture of the conical section away from the intake pipe is larger than the aperture of the other end, and the aperture of the conical section close to the intake pipe is equal to the maximum aperture of the intake pipe.

[0013] An air delivery pipe in communication with the delivery pipe II is disposed on one side of the lower portion of the delivery pipe II, and an air amplifier is disposed in the delivery pipe II at a position opposite to the air delivery pipe.

[0014] The pressure difference detection component is configured as an air pressure difference switch, and the prompt unit is configured as an audible and visual alarm unit.

[0015] The beneficial effects of the utility model are:

[0016] The utility model installs a pressure difference detection component at the air inlet of the slag conveying pipeline to measure the pressure difference between this place and the atmospheric pressure. When the protective slag is normally conveyed, due to the high air flow rate at the air inlet, the pressure drops, and a pressure drop is formed with the atmospheric pressure. When the protective slag is blocked or empty, the pressure difference changes. The control unit can judge the conveying state of the protective slag according to the size of the pressure difference value. When the protective slag is blocked and empty, the prompt unit will prompt the staff to deal with it in time, avoiding the situation of insufficient coverage of the protective slag in the crystallizer and preventing production accidents caused by it. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a brief description of the contents expressed in each of the drawings of the utility model specification and the marks in the drawings:

[0018] Figure 1 It is a structural schematic diagram of the detection device of the utility model;

[0019] Figure 2 It is a schematic diagram of the working state of the detection device of the utility model when the protective slag is normally conveyed;

[0020] Figure 3 It is a schematic diagram of the working state of the detection device of the utility model when the pipeline is blocked by protective slag;

[0021] The markings in the above figures are: 1. Conveying pipe I, 1-1. Columnar section, 1-2. Conical section, 2. Conveying pipe II, 3. Suction pipe, 4. Pressure measuring tube, 5. Air pipe, 6. Air delivery pipe, 7. Feed inlet, 8. Discharge outlet, 9. Suction port, 10. Pressure difference detection component, 11. Air amplifier. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In order to solve the technical problems proposed by the utility model, Figure 1As shown, the utility model provides a slag feeding state detection device for a continuous casting slag feeding machine, comprising a slag feeding pipeline for conveying protective slag into a crystallizer, the slag feeding pipeline comprising an inlet 7, an outlet 8 and an air intake 9 which are connected to each other, the slag feeding machine adopts pneumatic conveying of protective slag, and forms a negative pressure by conveying compressed gas into the slag feeding pipeline, and can automatically suck in the protective slag entering the slag feeding pipeline through the inlet 7 and discharge it from the outlet 8, and then convey it into the crystallizer. The aperture size of the air intake 9 affects the size of the suction force of the protective slag being sucked in. A pressure difference detection component 10 is installed at the air intake 9, which is used to measure the pressure difference between the air intake 9 and the atmospheric pressure, and the pressure difference detection component 10 is connected to a prompt unit for prompting slag blockage or empty delivery through a control unit. When the protective slag is conveyed normally, due to the high air flow rate at the air intake 9, the pressure drops, and a pressure drop is formed with the atmospheric pressure. When the protective slag is blocked or empty, the pressure difference changes, and the control unit can judge the conveying state of the protective slag according to the size of the pressure difference value. When the protective slag blockage and empty suction are detected, the prompt unit will remind the staff to deal with it in time, avoiding the situation of insufficient coverage of the protective slag in the crystallizer and preventing production accidents caused by it.

[0026] Specifically, the slag conveying pipeline is configured as a three-way pipe, including a conveying pipe Ⅰ1 and a conveying pipe Ⅱ2 that are connected. A feed port 7 is provided at one end of the conveying pipe Ⅰ1, and an air inlet 9 is provided at the other end of the conveying pipe Ⅰ1, which is used to inhale air into the conveying pipe Ⅰ1; a discharge port 8 is provided at one end of the conveying pipe Ⅱ2 away from the conveying pipe Ⅰ1; an air delivery pipe 6 connected thereto is provided on one side of the lower part of the conveying pipe Ⅱ2, and an air amplifier 11 is provided at a position opposite to the air delivery pipe 6 in the conveying pipe Ⅱ2. By inputting a small amount of compressed air into the air delivery pipe 6, the air amplifier 11 drives the surrounding compressed air to flow, forming a high-speed, high-capacity airflow output, thereby forming a negative pressure in the conveying pipe Ⅱ2, and under the suction of the air inlet 9, the protective slag entering the conveying pipe Ⅰ1 is transported downward to the crystallizer through the conveying pipe Ⅱ2.

[0027] The conveying pipe Ⅰ1 is set as a horizontal pipe, the lower side of the conveying pipe Ⅰ1 is connected with the conveying pipe Ⅱ2, and the angle between the central axis of the conveying pipe Ⅱ2 and the conveying pipe Ⅰ1 is an acute angle or an obtuse angle, so that the conveying of the protective slag is smoother.

[0028] Specifically, the end of the conveying pipe Ⅰ1 away from the feed port 7 is provided with an air intake pipe 3, and the air intake pipe 3 and the conveying pipe Ⅰ1 can be integrally formed, or connected in a detachable manner. Conical holes are relatively arranged in the air intake pipe 3, and the apertures at both ends of the air intake pipe 3 are larger than the aperture inside, so that high-speed gas can be sucked into the conveying pipe Ⅰ1. Since the two conical holes are relatively arranged, and the ends with larger apertures are both facing the two ends of the air intake pipe 3, after the airflow passes through the air intake pipe 3, the airflow velocity first increases and then decreases, and then enters the conveying pipe Ⅰ1. By adjusting the aperture and length of the two conical holes, the velocity and pressure (suction) of the airflow entering the conveying pipe Ⅰ1 can be adjusted, so as to stably and efficiently transport the protective slag in the conveying pipe Ⅰ1 to the conveying pipe Ⅱ2. The conveying pipe Ⅰ1 includes a cylindrical section 1-1 and a conical section 1-2. The cylindrical section 1-1 is connected to the suction pipe 3 through the conical section 1-2. The aperture of the conical section 1-2 at one end away from the suction pipe 3 is larger than the aperture of the other end, and the aperture of the conical section 1-2 at one end close to the suction pipe 3 is equal to the maximum aperture of the suction pipe 3, so that the external gas passes through the suction port 9 with a smaller aperture and then accelerates to enter the conveying pipe Ⅰ1 with a larger diameter, giving the protective slag a greater conveying force.

[0029] Specifically, the suction pipe 3 is also provided with a pressure measuring tube 4 connected thereto, and the pressure measuring tube 4 is connected to the pressure difference detection component 10 through the air pipe 5. The pressure difference detection component 10 is configured as an air pressure difference switch, which is used to measure the pressure difference between the suction port 9 and the atmospheric pressure. The prompt unit is configured as an audible and visual alarm unit. When the protective slag blockage and empty suction are detected, different audible and visual alarms can be used to prompt the staff to deal with it in time, such as using different voice prompts when blocked and when empty suction occurs.

[0030] The working principle of the above-mentioned slag adding state detection device for continuous casting slag adding machine is as follows: Figure 2 As shown, when the protective slag is normally transported, due to the high air flow rate at the air inlet 9, the pressure drops, and a pressure drop is formed with the atmospheric pressure. The pressure difference detection component 10 detects the pressure difference signal between the air inlet 9 and the atmospheric pressure and transmits it to the control unit. The control unit determines that the pressure difference value is within the set range, and the prompt unit does not operate. At the same time, a small amount of compressed air is input into the air delivery pipe 6, and the air amplifier 11 drives the surrounding compressed air to flow, forming a high-speed, high-capacity air flow output, thereby forming a negative pressure in the delivery pipe Ⅱ2. Under the suction of the air inlet 9, the protective slag entering the delivery pipe Ⅰ1 is transported downward to the crystallizer through the delivery pipe Ⅱ2.

[0031] like Figure 3 As shown, when the protective slag blocks the conveying pipe Ⅰ1, the air flow rate in the air intake port 9 is zero, the pressure difference disappears, the pressure difference detection component 10 is triggered, and the control unit determines it as a slag blocking signal, triggering the prompt unit to alarm, indicating that slag blockage has occurred, and reminding the staff to deal with it in time.

[0032] When the feeding mechanism fails to feed the conveying pipe Ⅰ1 normally, the air flow rate in the suction pipe 3 becomes faster, and the pressure difference becomes larger. The pressure difference detection component 10 is reversely triggered, and the control unit determines it as an empty suction signal, triggering the prompt unit to alarm, indicating that no protective slag has entered the conveying pipe, reminding the staff to deal with it in time.

[0033] In summary, the utility model has a simple structure and low manufacturing cost, and can timely detect blockage and empty delivery of the slag feeder pipeline, thereby avoiding the occurrence of insufficient coverage of protective slag in the crystallizer and preventing production accidents caused thereby.

[0034] The above description is only used to illustrate some principles of the utility model. This specification is not intended to limit the utility model to the specific structure and application scope shown and described. Therefore, all corresponding modifications and equivalents that may be used belong to the patent scope applied for the utility model.

Claims

1. A slag adding state detection device for a continuous casting slag adding machine, characterized in that: It includes a slag conveying pipeline for conveying protective slag into the crystallizer, the slag conveying pipeline includes an inlet, an outlet and an air intake that are interconnected, a pressure difference detection component is installed at the air intake, and the pressure difference detection component is connected to a prompt unit for prompting slag blockage or empty delivery through a control unit.

2. The slag adding state detection device for a continuous casting slag adding machine according to claim 1, characterized in that: The slag conveying pipeline is configured as a three-way pipe, including a conveying pipe I and a conveying pipe II that are connected.

3. The slag adding state detection device for a continuous casting slag adding machine according to claim 2, characterized in that: The conveying pipe I is configured as a horizontal pipe, the lower side of the conveying pipe I is connected to the conveying pipe II, and the angle between the central axis of the conveying pipe II and the conveying pipe I is an acute angle or an obtuse angle.

4. The slag adding state detection device for a continuous casting slag adding machine according to claim 2, characterized in that: The feeding port is arranged at one end of the conveying pipe I, and the air inlet is arranged at the other end of the conveying pipe I; the discharging port is arranged at the end of the conveying pipe II away from the conveying pipe I.

5. The slag adding state detection device for a continuous casting slag adding machine according to claim 4, characterized in that: An air suction pipe is arranged at one end of the conveying pipe I away from the feed port, and conical holes are arranged relatively inside the air suction pipe, and the apertures at both ends of the air suction pipe are larger than the aperture inside.

6. The slag adding state detection device for a continuous casting slag adding machine according to claim 5, characterized in that: The air intake pipe is also provided with a pressure measuring tube in communication therewith, and the pressure measuring tube is connected to the pressure difference detection component through an air pipe.

7. The slag adding state detection device for a continuous casting slag adding machine according to claim 5, characterized in that: The delivery pipe I includes a cylindrical section and a conical section, and the cylindrical section is connected to the intake pipe through the conical section; the aperture of the conical section away from the intake pipe is larger than the aperture of the other end, and the aperture of the conical section close to the intake pipe is equal to the maximum aperture of the intake pipe.

8. The slag adding state detection device for a continuous casting slag adding machine according to claim 4, characterized in that: An air delivery pipe in communication with the delivery pipe II is disposed on one side of the lower portion of the delivery pipe II, and an air amplifier is disposed in the delivery pipe II at a position opposite to the air delivery pipe.

9. The slag adding state detection device for a continuous casting slag adding machine according to claim 1, characterized in that: The pressure difference detection component is configured as an air pressure difference switch, and the prompt unit is configured as an audible and visual alarm unit.

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