Device for verifying blast furnace burden distribution angle accuracy

Abstract

The utility model discloses a device for checking the accuracy of a distribution angle of a blast furnace, which comprises a guide rail, a mobile platform, a lifting platform, a laser pen, a glare flashlight, a semicircular protractor and a plumb bob, and the lifting platform is horizontally arranged on the mobile platform; a clamping groove is formed in the rear end of the lifting platform; a laser pen or a glare flashlight is arranged in the clamping groove; a positioning cross is arranged on the circular manhole of the blast furnace; a positioning column of the semicircular protractor is arranged in the circular ring, and the circle center of a rear panel of the semicircular protractor is connected with the plumb bob through a plumb line. According to the utility model, through the cooperation of the glare flashlight, the semicircular protractor and the plumb bob, the accuracy of non-contact verification of the distribution angle of the blast furnace outside the furnace is realized, the structure is simple, the operation is convenient, the safety in the verification process is ensured, and the verification accuracy and the working efficiency are improved.

Description

Technical Field

[0001] The utility model relates to an improvement of a detection device for a blast furnace distribution angle, belonging to the technical field of blast furnace detection, in particular to a device for checking the accuracy of a blast furnace distribution angle. Background Art

[0002] In the metallurgical industry, the current blast furnaces generally use bellless distribution. The raw materials are accurately distributed into the blast furnace at the set angle through the distribution chute on the top of the furnace. At the same time, different distribution modes can be selected during the adjustment of the blast furnace conditions to achieve stable control of the gas flow. Compared with the traditional bell distribution, the bellless distribution is more flexible and accurate, but it requires higher accuracy in the blast furnace distribution angle. As the blast furnace top equipment increases in use time, it will experience varying degrees of wear and the control signal transmission will be unstable, resulting in a deviation between the actual distribution angle and the set value, which in turn affects the reasonable distribution of the blast furnace gas flow and causes furnace conditions. In this regard, blast furnace staff will regularly calibrate the blast furnace distribution angle to ensure its accuracy.

[0003] At present, there are two main ways to calibrate the angle of blast furnace distribution: one is that the measurement personnel enter the furnace and measure directly through the measuring device, but safety cannot be effectively guaranteed during the measurement process; the other is to use an infrared rangefinder or a laser three-dimensional scanning rangefinder to mark and scan the distribution chute to indirectly measure the distribution angle. Although this method can ensure safety, due to the high temperature and complex gas environment in the furnace, it has a certain degree of impact on the accuracy of the measurement, and the operation is relatively complicated and the work efficiency is low. Summary of the invention

[0004] The purpose of the utility model is to provide a device for checking the accuracy of the blast furnace distribution angle, which has a simple structure, is easy to operate, and can realize non-contact calibration of the blast furnace distribution angle outside the furnace, which can not only ensure the safety during the calibration process, but also improve the accuracy and work efficiency.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The device for checking the accuracy of the blast furnace charging angle comprises a guide rail, a mobile platform, a lifting platform, a laser pen, a strong light flashlight, a semicircular protractor and a plumb bob. Two guide rails parallel to each other are arranged in front of the square inspection door of the blast furnace, and the guide rails are parallel to the horizontal line passing through the center of the circular manhole in the middle of the square inspection door; a mobile platform is arranged on the guide rails; the device is characterized in that: the lifting platform is horizontally arranged on the mobile platform; a circular ring is fixedly arranged on the front end of the lifting platform through a supporting rod, and a clamping slot is fixedly arranged on the rear end of the lifting platform through a fixing rod, and the central axis of the inner cavity of the clamping slot coincides with the center of the circular ring; A laser pen or a high-intensity flashlight is arranged in the card slot. When the laser pen is placed in the card slot, the central axis of the laser pen coincides with the center of the circular ring. When the high-intensity flashlight is placed in the card slot, the central axis of the high-intensity flashlight coincides with the center of the circular ring. A positioning cross is arranged on the circular manhole of the square inspection door of the blast furnace. A positioning column is fixedly arranged on the front panel of the semicircular protractor, and the positioning column is rotatably arranged in the cavity of the circular ring. A center fixing pin is fixedly arranged at the center of the rear panel of the semicircular protractor, and the center fixing pin is connected to the plumb bob through a plumb line. The central axis of the positioning column coincides with the center of the semicircular protractor.

[0007] The positioning cross is composed of a horizontal bar, a vertical bar and a right-angle clamp. The horizontal bar and the vertical bar are vertically crossed and fixed as a whole. Both ends of the horizontal bar and the vertical bar are fixed with right-angle clamps. The lengths of the horizontal bar and the vertical bar are the same as the diameter of the circular manhole. A positioning dot is provided at the center of the horizontal bar, and the positioning dot coincides with the center of the circular manhole.

[0008] The movable platform is composed of a workbench, walking wheels, a fixed seat, a bracket, a guide column, a lifting screw and a nut. Fixed seats are respectively provided on the bottom plate surfaces at the front and rear ends of the workbench through the brackets, and walking wheels compatible with the guide rails are fixed in the fixed seats through bearings. Sliding holes are respectively provided at the front and rear ends of the workbench, and guide columns that slide up and down are provided in the sliding holes. A nut is fixed in the middle through hole of the workbench, and a lifting screw with a threaded connection is provided in the nut cavity. The front and rear ends of the lifting platform are respectively fixedly connected to the upper ends of the compatible guide columns, and the middle part of the lifting platform is rotatably connected to the upper end of the lifting screw.

[0009] Four of the brackets are provided; and four of the guide posts are provided.

[0010] The beneficial effect of the utility model is that the utility model realizes non-contact calibration of the blast furnace distribution angle accuracy outside the furnace through the cooperation of a strong light flashlight, a semicircular protractor and a plumb bob, has a simple structure and is easy to operate, which not only ensures the safety during the calibration process, but also improves the accuracy and work efficiency of the calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of the utility model in use;

[0012] Figure 2 It is a schematic top view of the structure of the utility model when it is positioned;

[0013] Figure 3 It is a schematic diagram of the structure of the utility model when measuring;

[0014] Figure 4 It is an enlarged front view schematic diagram of the structure of the positioning cross of the utility model;

[0015] Figure 5 It is an enlarged front view of the structure of the positioning cross of the utility model in the use state;

[0016] Figure 6 It is an enlarged schematic diagram of the combined structure of the semicircular protractor and the plumb bob of the utility model.

[0017] In the figure: 1. blast furnace; 2. guide rail; 3. mobile platform; 31. workbench; 32. walking wheel; 33. fixed seat; 34. bracket; 35. guide column; 36. lifting screw; 37. nut; 4. lifting platform; 5. slot; 51. fixing rod; 6. circular ring; 61. supporting rod; 7. laser pen; 8. semicircular protractor; 81. positioning column; 9. plumb bob; 10. strong light flashlight; 11. square inspection door; 12. circular manhole; 13. material chute; 14. positioning cross; 15. plumb line; 16. center fixing needle. DETAILED DESCRIPTION

[0018] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 The utility model is produced. A square inspection door 11 is provided on the side wall of the current blast furnace 1, a circular manhole 12 is provided in the middle of the square inspection door 11, and a material distribution chute 13 is provided in the cavity of the blast furnace 1. The blast furnace operator adjusts the material distribution angle position of the material distribution chute 13 through the blast furnace computer.

[0019] The device for checking the accuracy of the blast furnace charging angle comprises a guide rail 2, a movable platform 3, a lifting platform 4, a laser pen 7, a strong light flashlight 10, a semicircular protractor 8 and a plumb bob 9. Two mutually parallel guide rails 2 are arranged in front of a square inspection door 11 of the blast furnace 1. The guide rails 2 are parallel to a horizontal line passing through the center of a circular manhole 12 in the middle of the square inspection door 11; a movable platform 3 is arranged on the guide rail 2, and the movable platform 3 moves along the guide rail 2; the device is characterized in that: the lifting platform 4 is horizontally arranged on the movable platform 3; a circular ring 6 is fixedly arranged at the front end of the lifting platform 4 through a support rod 61, and a clamping groove 5 is fixedly arranged at the rear end of the lifting platform 4 through a fixing rod 51, and the central axis of the inner cavity of the clamping groove 5 is aligned with the center of the circular ring 6 coincide with each other; a laser pen 7 or a strong light flashlight 10 is arranged in the card slot 5, when the laser pen 7 is placed in the card slot 5, the central axis of the laser pen 7 coincides with the center of the circle of the circular ring 6, when the strong light flashlight 10 is placed in the card slot 5, the central axis of the strong light flashlight 10 coincides with the center of the circle of the circular ring 6; a positioning cross 14 is arranged on the circular manhole 12 of the square inspection door 11 of the blast furnace 1; a positioning column 81 is fixedly arranged on the front panel of the semicircular protractor 8, the positioning column 81 is rotatably arranged in the cavity of the circular ring 6, a center fixing needle 16 is fixedly arranged at the center of the circle of the rear panel of the semicircular protractor 8, the center fixing needle 16 is connected to the plumb bob 9 through a plumb line 15, and the central axis of the positioning column 81 coincides with the center of the circle of the semicircular protractor 8;

[0020] The positioning cross 14 is composed of a cross bar 141, a vertical bar 144 and a right-angle clamp 142. The cross bar 141 and the vertical bar 144 are vertically crossed and fixed as a whole. The two ends of the cross bar 141 and the vertical bar 144 are fixed with a right-angle clamp 142. The lengths of the cross bar 141 and the vertical bar 144 are the same as the diameter of the circular manhole 12. A positioning dot 143 is provided at the center of the cross bar 141, and the positioning dot 143 coincides with the center of the circular manhole 12.

[0021] The mobile platform 3 is composed of a workbench 31, a walking wheel 32, a fixed seat 33, a bracket 34, a guide column 35, a lifting screw rod 36 and a nut 37. The fixing seats 33 are respectively provided on the bottom plate surfaces of the front and rear ends of the workbench 31 through the brackets 34. The walking wheels 32 compatible with the guide rail 2 are fixedly provided in the fixed seats 33 through bearings. The front and rear ends of the workbench 31 are respectively provided with sliding holes, and the sliding holes are provided with guide columns 35 that slide up and down. A nut 37 is fixed in the middle through hole of the workbench 31, and a lifting screw rod 36 with a threaded connection is provided in the cavity of the nut 37. The front and rear ends of the lifting platform 4 are respectively fixedly connected to the upper ends of the compatible guide columns 35. The middle part of the lifting platform 4 is rotatably connected to the upper end of the lifting screw rod 36. The height of the lifting platform 4 can be adjusted by rotating the lifting screw rod 36.

[0022] Four brackets 34 are provided so that the movable platform 3 can remain stable during the movement along the guide rail 2; four guide columns 35 are provided so that the lifting platform 4 can remain horizontal during the up and down movement.

[0023] The semicircular protractor 8 is made of an opaque material, and a scale is marked on its rear panel.

[0024] The method for checking the accuracy of the blast furnace charging angle adopts the above-mentioned device for checking the accuracy of the blast furnace charging angle, and is characterized by being completed by the following steps:

[0025] (I) Install the positioning cross 14: After the blast furnace 1 is shut down, open the circular manhole 12 on the square inspection door 11, clamp the four right-angle clamps 142 of the positioning cross 14 on the peripheral edge of the circular manhole 12, and use a level to measure so that the crossbar 141 of the positioning cross 14 is in a horizontal position;

[0026] (ii) Positioning the laser pen 7: Install the laser pen 7 into the slot 5, leaving the ring 6 empty, slide the mobile platform 3 along the guide rail 2, turn the lifting screw 36 to adjust the height of the lifting platform 4, so that the light emitted by the laser pen 7 passes through the center of the ring 6 and shines on the positioning dot 143 of the positioning cross 14, and lock the mobile platform 3; remove the positioning cross 14 on the circular manhole 12;

[0027] (III) Install the strong light flashlight 10 and the semicircular protractor 8: Remove the laser pen 7, install the strong light flashlight 10 into the card slot 5, insert the positioning column 81 on the front panel of the semicircular protractor 8 into the cavity of the ring 6, and let the plumb bob 9 droop naturally;

[0028] (IV) First gear detection and recording of chute angle value: notify the control personnel of blast furnace 1 to adjust the distribution chute 13 to the first gear position as required; turn on the strong light flashlight 10, project the upper edge of the semicircular protractor 8 into the circular manhole 12, rotate the semicircular protractor 8 so that the upper edge projection of the semicircular protractor 8 coincides with the edge of the distribution chute 13; the plumb line 15 corresponds to the scale on the rear panel of the semicircular protractor 8, and this scale value is the chute angle, and record the chute angle value of the first gear at this time;

[0029] (V) Subsequent gear detection and recording of chute angle values: notify the control personnel of the blast furnace 1 to gradually adjust the distribution chute 13 to the second gear position and subsequent gear positions as required; at each gear position, turn the lifting screw 36 to adjust the height of the lifting platform 4, and turn the semicircular protractor 8 so that the upper edge projection of the semicircular protractor 8 coincides with the edge of the distribution chute 13 of the corresponding gear. At this time, the plumb line 15 corresponds to the scale on the rear panel of the semicircular protractor 8, and the chute angle value of the corresponding gear is recorded; until all gears are fully detected;

[0030] (VI) Verify the accuracy of the blast furnace charging angle: On-site measurement personnel will compare the chute angle value corresponding to each gear with the blast furnace airtight box value of the same gear and the blast furnace computer display angle of the same gear, thus completing the verification of the accuracy of the blast furnace charging angle.

[0031] When working on site, after completing the accuracy verification of the distribution angles of all gears of the blast furnace, the distribution angle of the blast furnace is adjusted in time according to the comparison results, that is, according to the chute angle value measured on site, the position of the distribution chute 13 is adjusted through the blast furnace computer.

[0032] For example, when checking the accuracy of the burden distribution angle of a 1780m³ blast furnace:

[0033] First gear: The blast furnace computer displays an angle of 42.6 degrees, the airtight box value is 41.5 degrees, and the measured chute angle value is 41.3 degrees;

[0034] The second gear: the blast furnace computer displays an angle of 38.2 degrees, the airtight box value is 37.0 degrees, and the measured chute angle value is 37.0 degrees;

[0035] The third gear: the blast furnace computer display angle is 33.3 degrees, the airtight box value is 33.0 degrees, and the measured chute angle value is 33.0 degrees;

[0036] The fourth gear: the blast furnace computer displays an angle of 29.4 degrees, the airtight box value is 29.0 degrees, and the measured chute angle value is 29.5 degrees;

[0037] The fifth gear: the blast furnace computer displays an angle of 23.7 degrees, the airtight box value is 24.0 degrees, and the measured chute angle value is 24.0 degrees;

[0038] The sixth gear: the blast furnace computer display angle is 19.0 degrees, the airtight box value is 20.0 degrees, and the measured chute angle value is 20.0 degrees;

[0039] Level 7: The blast furnace computer displayed an angle of 12.8 degrees, the airtight box value was 14.0 degrees, and the actual chute angle value was 14.2 degrees.

[0040] In this test, all seven gears need to use the blast furnace computer to adjust the angle of the distribution chute according to the actual measured chute angle value of each gear, so that the angle displayed by the blast furnace computer at each gear is the same as the actual measured chute angle value.

Claims

1. A device for checking the accuracy of the angle of charge distribution in a blast furnace, comprising a guide rail (2), a movable platform (3), a lifting platform (4), a laser pen (7), a strong light flashlight (10), a semicircular protractor (8) and a plumb bob (9), wherein two guide rails (2) parallel to each other are arranged in front of a square inspection door (11) of the blast furnace (1), and the guide rails (2) are parallel to a horizontal line passing through the center of a circular manhole (12) in the middle of the square inspection door (11); a movable platform (3) is arranged on the guide rail (2); and the characteristics are as follows: A lifting platform (4) is horizontally arranged on the mobile platform (3); a circular ring (6) is fixedly arranged at the front end of the lifting platform (4) via a support rod (61); a card slot (5) is fixedly arranged at the rear end of the lifting platform (4) via a fixing rod (51); the central axis of the inner cavity of the card slot (5) coincides with the center of the circular ring (6); a laser pen (7) or a high-intensity flashlight (10) is arranged in the card slot (5); when the laser pen (7) is placed in the card slot (5), the central axis of the laser pen (7) coincides with the center of the circular ring (6); when the high-intensity flashlight (10) is placed in the card slot (5), the central axis of the laser pen (7) coincides with the center of the circular ring (6); The central axis of the electric (10) coincides with the center of the circular ring (6); a positioning cross (14) is provided on the circular manhole (12) of the square inspection door (11) of the blast furnace (1); a positioning column (81) is fixedly provided on the front panel of the semicircular protractor (8), the positioning column (81) is rotatably arranged in the cavity of the circular ring (6), a center fixing needle (16) is fixedly provided at the center of the rear panel of the semicircular protractor (8), the center fixing needle (16) is connected to the plumb bob (9) through a plumb line (15), and the central axis of the positioning column (81) coincides with the center of the semicircular protractor (8); The positioning cross (14) is composed of a horizontal bar (141), a vertical bar (144) and a right-angle clamp (142). The horizontal bar (141) and the vertical bar (144) are vertically crossed and fixed as a whole. The right-angle clamp (142) is fixed at both ends of the horizontal bar (141) and the vertical bar (144). The lengths of the horizontal bar (141) and the vertical bar (144) are the same as the diameter of the circular manhole (12). A positioning dot (143) is provided at the center of the horizontal bar (141). The positioning dot (143) coincides with the center of the circular manhole (12). The movable platform (3) is composed of a workbench (31), a walking wheel (32), a fixed seat (33), a bracket (34), a guide column (35), a lifting screw rod (36) and a nut (37). The fixing seats (33) are respectively provided on the bottom plate surfaces of the front and rear ends of the workbench (31) through the bracket (34). The fixed seats (33) are fixedly provided with walking wheels (32) adapted to the guide rail (2) through bearings in the fixed seats (33). The front and rear ends of the workbench (31) are respectively provided with sliding holes, and the sliding holes are provided with guide columns (35) that slide up and down. A nut (37) is fixedly provided in the middle through hole of the workbench (31), and a lifting screw rod (36) connected by thread is provided in the cavity of the nut (37). The front and rear ends of the lifting platform (4) are respectively fixedly connected to the upper ends of the adapted guide columns (35), and the middle of the lifting platform (4) is rotatably connected to the upper end of the lifting screw rod (36).

2. The device for checking the accuracy of blast furnace charge distribution angle according to claim 1, characterized in that: Four of the brackets (34) are provided; and four of the guide posts (35) are provided.

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