Tundish roaster gas safety interlocking device

Abstract

The utility model relates to the technical field of automation control, in particular to a tundish roaster gas safety interlocking device which comprises a valve body, one end of the valve body is communicated with an input pipe, the output end of the valve body is communicated with an output pipe, one end of the output pipe is communicated with a monitoring pipe, and one end of the input pipe and one end of the output pipe are jointly and fixedly connected with a supporting frame. A flame detector is fixedly connected to one end of the top of the supporting frame, a controller is fixedly connected to the center of the top of the supporting frame, a threaded rod is arranged at one end of the top of the valve body, a first gear is fixedly connected to the top of the threaded rod, a motor is fixedly connected to one end of the side wall of the supporting frame, and a second gear is fixedly connected to the output end of the motor. The first gear is connected with the second gear in a meshed mode, and the bottom of the threaded rod extends into the valve body and is fixedly connected with a blocking block. Through the design of the monitoring pipe, the flame detector can accurately detect the combustion condition of coal gas.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic control, in particular to a gas safety interlock device for a tundish roaster. Background Art

[0002] In the metallurgical production process, the refractories in the tundish and ladle need to be subjected to high-temperature baking treatment before being put into use to remove moisture, improve strength and durability. In this process, coke oven gas is generally used as the heat source. However, the high-concentration carbon monoxide gas contained in coke oven gas is highly toxic. In actual use, due to reasons such as insufficient gas pressure or equipment failure, the flame of the burner may go out, and then a large amount of gas will leak into the air, posing a great safety hazard to the safety of surrounding workers. Therefore, the flame-out detection device of the roaster for the tundish or ladle must be reliable;

[0003] After retrieval, a Chinese patent with the publication number CN111604493B discloses a tundish baking protection system, including a roaster, a tundish arranged below the roaster, and a PLC controller. The roaster includes burners, gas branch pipes and air branch pipes. There are multiple burners, which are arranged at intervals along the length direction of the tundish and centered. An electronic igniter and a flame detector are arranged in the burner, and the burner is connected to the gas branch pipe. A gas flow detector, a gas cut-off valve and a gas flow regulating valve are arranged on the gas branch pipe; the burner is connected to the air branch pipe; an air flow detector, an air cut-off valve and an air flow regulating valve are configured on the air branch pipe; each detector, each valve and the electronic igniter are respectively connected to the PLC controller. The beneficial effect of the present invention is that the protection system can be used for protection in both the maintenance mode and the baking mode, effectively ensuring the safety and control of each working state in the tundish baking area;

[0004] In the above technology, although the design of the flame detector can detect the flame condition of the burner, so as to understand whether there is gas leakage, during normal baking, the flame is inside the tundish or ladle. Because of the shielding of the ladle cover, it is difficult for the flame detector to directly monitor the true state of the flame inside the ladle, resulting in an unsatisfactory detection effect and potential safety hazards;

[0005] Therefore, the utility model provides a gas safety interlock device for a tundish roaster. Content of the Utility Model

[0006] Therefore, the technical problem to be solved by the utility model is to overcome the problem that the flame detector in the prior art is difficult to directly monitor the true state of the flame inside the ladle.

[0007] To solve the above technical problems, the utility model provides a gas safety interlock device for a tundish baking furnace, which includes a valve body. One end of the valve body is connected to an input pipe, the output end of the valve body is connected to an output pipe, one end of the output pipe is connected to a monitoring pipe, and one ends of the input pipe and the output pipe are jointly fixedly connected to a support frame. One end of the top of the support frame is fixedly connected to a flame detector, and the center of the top of the support frame is fixedly connected to a controller. One end of the top of the valve body is provided with a threaded rod, the top of the threaded rod is fixedly connected to a first gear, one end of the side wall of the support frame is fixedly connected to a motor, the output end of the motor is fixedly connected to a second gear, the first gear is meshed with the second gear, and the bottom of the threaded rod extends into the valve body and is fixedly connected to a plug block.

[0008] In an embodiment of the utility model, a valve cover is arranged on the top of the valve body. Fixed columns are respectively fixedly connected to both ends of the threaded rod on the top of the valve cover. A fixed block is jointly fixedly connected to the two fixed columns, and the threaded rod is threadedly connected to the fixed block.

[0009] In an embodiment of the utility model, a sliding rod is fixedly connected to the bottom of the threaded rod. The sliding rod is slidably connected to the valve cover, and the bottom of the sliding rod is fixedly connected to the plug block.

[0010] In an embodiment of the utility model, a first guide plate is fixedly connected to the top of one end of the input pipe inside the valve body, and a second guide plate is fixedly connected to the bottom of one end of the output pipe inside the valve body.

[0011] In an embodiment of the utility model, a baffle is fixedly connected to the bottom of the valve body directly below the plug block. The baffle is fixedly connected to both the first guide plate and the second guide plate. A through hole is provided in the middle of the baffle, and the plug block is movably connected to the through hole.

[0012] In an embodiment of the utility model, a flange is fixedly connected to one end of the side wall of the plug block. A groove is provided at the through hole on the top of the baffle, and the flange is movably lapped with the groove.

[0013] In an embodiment of the utility model, a first support arm is fixedly connected to one end of the top of the support frame. The first support arm is fixedly connected to the flame detector. An alarm is fixedly connected to one end of the top of the first support arm. The alarm is electrically connected to both the flame detector and the controller.

[0014] In an embodiment of the utility model, a second support arm is fixedly connected to one end of the top of the monitoring pipe. A igniter is fixedly connected to the top of the second support arm. The igniter is electrically connected to the controller.

[0015] The above technical solution of the utility model has the following advantages compared with the prior art:

[0016] A gas safety interlock device for a tundish roaster, through the design of a monitoring pipe, can avoid the flame being blocked by the cover, so that the flame detector can accurately detect the combustion condition of the gas. The flame detector monitors the flame state of the monitoring pipe in real time. When the flame in the monitoring pipe goes out, the controller can quickly control the motor to start, thereby driving the second gear to rotate, and then driving the first gear to rotate, so as to drive the threaded rod to rotate. When the threaded rod rotates, it can drive the plug block to move downward, so that the plug block blocks the through hole, and thus the gas in the input pipe cannot flow into the output pipe and further cannot flow into the burner, effectively preventing gas leakage accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to the specific embodiments of the present utility model in conjunction with the attached drawings.

[0018] Figure 1 It is a three-dimensional structure schematic diagram of the present utility model;

[0019] Figure 2 It is a connection structure schematic diagram of the valve body and the valve cover in the present utility model;

[0020] Figure 3 It is a side sectional structure schematic diagram of the valve body in the present utility model;

[0021] Figure 4 It is a connection structure schematic diagram of the valve cover and the threaded rod in the present utility model;

[0022] Figure 5 It is a connection structure schematic diagram of the threaded rod and the sliding rod in the present utility model.

[0023] Explanation of the reference numerals in the drawings: 1. Valve body; 2. Input pipe; 3. Output pipe; 4. Monitoring pipe; 5. Support frame; 6. Flame detector; 7. Controller; 8. Threaded rod; 9. First gear; 10. Motor; 11. Second gear; 12. Plug block; 13. Valve cover; 14. Fixed column; 15. Fixed block; 16. Sliding rod; 17. First deflector; 18. Second deflector; 19. Baffle; 20. Through hole; 21. Flange; 22. Groove; 23. First support arm; 24. Alarm; 25. Second support arm; 26. Igniter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following further describes the present utility model in conjunction with the attached drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and can implement it, but the embodiments cited do not limit the present utility model.

[0025] Refer to Figures 1 to 5As shown in the figure, a gas safety interlock device for a tundish baking furnace of the present utility model includes a valve body 1. One end of the valve body 1 is connected to an input pipe 2, and the output end of the valve body 1 is connected to an output pipe 3. One end of the output pipe 3 is connected to a monitoring pipe 4. One end of the input pipe 2 and the output pipe 3 are jointly fixedly connected to a support frame 5. One end of the top of the support frame 5 is fixedly connected to a flame detector 6, and the center of the top of the support frame 5 is fixedly connected to a controller 7. One end of the top of the valve body 1 is provided with a threaded rod 8. The top of the threaded rod 8 is fixedly connected to a first gear 9. One end of the side wall of the support frame 5 is fixedly connected to a motor 10. The output end of the motor 10 is fixedly connected to a second gear 11. The first gear 9 is meshed with the second gear 11. The bottom of the threaded rod 8 extends into the valve body 1 and is fixedly connected to a plug 12;

[0026] In this embodiment, the input pipe 2 is connected to the gas pipeline, and the output pipe 3 is connected to the baking furnace. During the process of baking the tundish, the gas ejected from the output port of the monitoring pipe 4 is ignited. Since the flame inside the tundish cannot be detected from the outside after the cover is covered, the flame detector 6 only monitors the flame at the output port of the monitoring pipe 4 to understand whether the flame goes out inside the tundish. In addition, both the flame detector 6 and the motor 10 are electrically connected to the controller 7. When the flame at the monitoring pipe 4 goes out, the flame detector 6 can transmit a data signal to the controller 7, so that the controller 7 can immediately control the motor 10 to start, thereby driving the second gear 11 to rotate. When the second gear 11 rotates, it can drive the first gear 9 to rotate, thereby driving the threaded rod 8 to rotate. During the rotation of the threaded rod 8, it will move downward, thereby driving the plug 12 to move downward, so that the plug 12 blocks the internal channel of the valve body 1, so that the gas in the input pipe 2 cannot flow into the output pipe 3 and further cannot flow into the burner, effectively preventing gas leakage accidents.

[0027] As Figure 2 and Figure 4 shown in the figure, a valve cover 13 is provided on the top of the valve body 1. Fixed columns 14 are respectively fixedly connected to both ends of the threaded rod 8 on the top of the valve cover 13. The two fixed columns 14 are jointly fixedly connected to a fixed block 15. The threaded rod 8 is threadedly connected to the fixed block 15;

[0028] In this embodiment, the valve cover 13 is connected to the top of the valve body 1 by a flange. The threaded rod 8 is arranged on the valve cover 13. By screwing the threaded rod 8 and the fixed block 15 together, when the threaded rod 8 rotates, it can move up and down smoothly, thereby driving the plug 12 to move up and down.

[0029] As Figure 5 shown in the figure, a sliding rod 16 is fixedly connected to the bottom of the threaded rod 8. The sliding rod 16 is slidably connected to the valve cover 13. The bottom of the sliding rod 16 is fixedly connected to the plug 12;

[0030] In this embodiment, the threaded rod 8 is always located above the valve cover 13 and cannot pass through the valve cover 13 and enter the valve body 1. Through the design of the sliding rod 16, when the threaded rod 8 moves up and down, it can smoothly drive the plug 12 to move up and down.

[0031] As Figure 3 shown, a first deflector 17 is fixedly connected to the top of one end of the input pipe 2 inside the valve body 1, and a second deflector 18 is fixedly connected to the bottom of one end of the output pipe 3 inside the valve body 1; a baffle 19 is fixedly connected to the bottom directly below the plug 12 inside the valve body 1. The baffle 19 is fixedly connected to both the first deflector 17 and the second deflector 18. A through hole 20 is provided in the middle of the baffle 19, and the plug 12 is movably connected to the through hole 20;

[0032] In this embodiment, through the design of the first deflector 17, the second deflector 18 and the baffle 19, the inside of the valve body 1 can be divided into two chambers. When gas enters the valve body 1 through the input pipe 2, the gas will flow along the first deflector 17 to below the baffle 19 at this time. Then the gas will pass through the through hole 20 in the baffle 19, pass through the baffle 19, and flow into the output pipe 3 along the second deflector 18.

[0033] As Figures 3 to 5 shown, a flange 21 is fixedly connected to one end of the side wall of the plug 12, and a groove 22 is provided at the through hole 20 on the top of the baffle 19. The flange 21 is movably lapped with the groove 22,

[0034] In this embodiment, through the design of the flange 21 and the groove 22, the contact area between the plug 12 and the edge of the through hole 20 can be increased, thereby improving the sealing effect. In actual use, a sealing gasket can be provided on the contact surface between the flange 21 and the groove 22 to further improve the sealing performance.

[0035] As Figure 1 shown, one end of the top of the support frame 5 is fixedly connected to a first support arm 23. The first support arm 23 is fixedly connected to the flame detector 6. One end of the top of the first support arm 23 is fixedly connected to an alarm 24. The alarm 24 is electrically connected to both the flame detector 6 and the controller 7;

[0036] In this embodiment, through the design of the first support arm 23, the flame detector 6 can be fixed at a position adjacent to the output port of the monitoring pipe 4, so as to facilitate the flame detector 6 to detect the flame of the monitoring pipe 4. Through the design of the alarm 24, when the flame goes out, an alarm can be issued to prompt the staff to perform corresponding processing.

[0037] As Figure 1 shown, one end of the top of the monitoring pipe 4 is fixedly connected to a second support arm 25. The top of the second support arm 25 is fixedly connected to an igniter 26. The igniter 26 is electrically connected to the controller 7;

[0038] In this embodiment, through the design of the igniter 26, the gas at the outlet of the monitoring pipe 4 can be ignited, thus avoiding danger during manual ignition.

[0039] Working principle: During the baking process of the tundish, the igniter 26 ignites the gas ejected from the outlet of the monitoring pipe 4. The flame detector 6 can monitor the flame at the outlet of the monitoring pipe 4 in real time, so as to know whether the tundish is extinguished. When the flame of the monitoring pipe 4 is extinguished, the flame detector 6 can transmit a data signal to the controller 7, so that the controller 7 can immediately control the motor 10 to start, thereby driving the second gear 11 to rotate. When the second gear 11 rotates, it can drive the first gear 9 to rotate, thereby driving the threaded rod 8 to rotate. During the rotation of the threaded rod 8, it will move downward, thereby driving the slide rod 16 to move downward, and further driving the plug 12 to move downward. During the downward movement of the plug 12, the through hole 20 on the baffle 19 inside the valve body 1 can be blocked, so that the gas in the input pipe 2 cannot flow into the output pipe 3, and thus cannot flow into the burner, effectively preventing gas leakage accidents. In addition, through the design of the alarm 24, an alarm can be issued when the flame goes out, so as to prompt the staff to take corresponding measures.

[0040] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A gas safety interlock device for a tundish baking furnace, comprising a valve body (1), characterized in that: One end of the valve body (1) is connected to an input pipe (2), the output end of the valve body (1) is connected to an output pipe (3), one end of the output pipe (3) is connected to a monitoring pipe (4), one ends of the input pipe (2) and the output pipe (3) are jointly fixedly connected to a support frame (5), one end of the top of the support frame (5) is fixedly connected to a flame detector (6), the center of the top of the support frame (5) is fixedly connected to a controller (7), one end of the top of the valve body (1) is provided with a threaded rod (8), the top of the threaded rod (8) is fixedly connected to a first gear (9), one end of the side wall of the support frame (5) is fixedly connected to a motor (10), the output end of the motor (10) is fixedly connected to a second gear (11), the first gear (9) is meshed with the second gear (11), the bottom of the threaded rod (8) extends into the valve body (1) and is fixedly connected to a plug block (12).

2. The gas safety interlock device for a tundish baking furnace according to claim 1, characterized in that: A valve cover (13) is arranged on the top of the valve body (1), fixing columns (14) are respectively fixedly connected to both ends of the threaded rod (8) on the top of the valve cover (13), and a fixing block (15) is jointly fixedly connected to the two fixing columns (14), and the threaded rod (8) is in threaded connection with the fixing block (15).

3. The gas safety interlock device for a tundish baking furnace according to claim 2, characterized in that: A sliding rod (16) is fixedly connected to the bottom of the threaded rod (8), the sliding rod (16) is slidably connected to the valve cover (13), and the bottom of the sliding rod (16) is fixedly connected to the plug block (12).

4. An argon blowing device for a tundish according to claim 1, characterized in that: A first guide plate (17) is fixedly connected to the top of one end of the input pipe (2) inside the valve body (1), and a second guide plate (18) is fixedly connected to the bottom of one end of the output pipe (3) inside the valve body (1).

5. The gas safety interlock device for a tundish baking furnace according to claim 1, characterized in that: A baffle plate (19) is fixedly connected to the bottom directly below the plug block (12) inside the valve body (1), the baffle plate (19) is fixedly connected to both the first guide plate (17) and the second guide plate (18), a through hole (20) is provided in the middle of the baffle plate (19), and the plug block (12) is movably connected to the through hole (20).

6. The gas safety interlock device for a tundish baking furnace according to claim 5, characterized in that: A flange (21) is fixedly connected to one end of the side wall of the plug block (12), a groove (22) is provided at the through hole (20) on the top of the baffle plate (19), and the flange (21) is movably lapped with the groove (22).

7. An argon blowing device for a tundish according to claim 1, characterized in that: A first support arm (23) is fixedly connected to one end of the top of the support frame (5), the first support arm (23) is fixedly connected to the flame detector (6), an alarm (24) is fixedly connected to one end of the top of the first support arm (23), and the alarm (24) is electrically connected to both the flame detector (6) and the controller (7).

8. An argon blowing device for a tundish according to claim 1, wherein: A second support arm (25) is fixedly connected to one end of the top of the monitoring pipe (4), an igniter (26) is fixedly connected to the top of the second support arm (25), and the igniter (26) is electrically connected to the controller (7).

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