A kind of intermediate frequency electric furnace lining thickness measuring frock

Abstract

The utility model discloses a kind of middle frequency electric furnace lining thickness measurement frock, including centering device, centering device includes the center pole of hollow structure, and the lower end of center pole is fixedly connected with fixed seat, and fixed seat circumferential direction is hinged with several first connecting rods, and the upper portion of center pole is slidably connected with sliding seat, and the upper portion of center pole is hinged with several second connecting rods in sliding seat circumferential direction, and the upper portion of center pole is threadedly connected with screw sleeve;Nut interior is rotatably connected with rotary drum through bearing, and rotary drum upper end is equipped with hand wheel, and rotary drum side is equipped with suspender, and suspender lower end is equipped with installation box, and installation box is equipped with range finder inside.The utility model finds the center position of furnace lining accurately using centering device, then the inner diameter of furnace lining is accurately measured using range finder, and the thickness of furnace lining can be obtained using difference method;In addition, by rotating hand wheel, using rotary drum to drive suspender and range finder to rotate, the thickness of furnace lining at different positions on the same plane can be obtained, and multiple-point measurement is realized once clamping.

Description

Technical Field

[0001] This utility model belongs to the field of measuring tools, and specifically relates to a tooling for measuring the thickness of a medium-frequency electric furnace lining. Background Technology

[0002] In modern casting industry, medium-frequency electric furnaces have become the core equipment for molten iron smelting due to their advantages such as high efficiency, energy saving, and strong controllability. Their core component—the furnace lining (commonly known as the crucible)—serves as the container that directly bears the high-temperature molten iron and furnace gases, continuously enduring extreme conditions during the melting process: on the one hand, the temperature of the molten iron reaches over 1500℃, causing the furnace lining material to undergo thermal expansion, softening, and crystal transformation; on the other hand, oxidizing gases in the furnace gas (such as CO2 and O2) react chemically with the furnace lining material, further aggravating material loss. Due to the uneven temperature field distribution and differences in the flow characteristics of the molten iron within the electric furnace, the erosion rate of different parts of the furnace lining exhibits significant non-uniformity. For example, the erosion rate in the furnace mouth area, due to frequent charging and mechanical erosion, can be 3-5 times that of the furnace bottom area.

[0003] Non-uniform thinning of the furnace lining directly threatens production safety. When the lining thickness in a localized area falls below the safety threshold, it can trigger a furnace penetration accident, leading to molten iron leakage, equipment damage, and even casualties. Therefore, accurately monitoring the thickness of various parts of the furnace lining and developing targeted maintenance strategies are crucial for ensuring the safe operation of electric arc furnaces.

[0004] In existing technologies, simple measurements such as measuring tapes are often used in conjunction with the number of times the furnace is started to determine the furnace lining life. However, this measurement method has a large error. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a tooling for measuring the thickness of medium-frequency electric furnace lining, so as to solve the problem of low accuracy in the existing furnace lining thickness measurement technology.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A fixture for measuring the thickness of a medium-frequency electric furnace lining, comprising: A centering device for determining the center of the furnace body includes a hollow central rod. A fixed base is fixedly connected to the lower end of the central rod. Several first connecting rods are pivotally connected to the fixed base in the circumferential direction. A sliding block is slidably connected to the upper part of the central rod. Several second connecting rods are pivotally connected to the sliding block in the circumferential direction. The other ends of the corresponding first and second connecting rods are pivotally connected, and an inner clamping plate is connected at the pivot point of the first and second connecting rods. A first spring is provided between the fixed base and the sliding block. A threaded sleeve is threadedly connected to the upper part of the central rod. A nut is threadedly connected to the upper end of the central rod; inside the nut, a rotating drum is rotatably connected via a bearing. A handwheel is provided at the upper end of the rotating drum, and a lifting rod is provided on one side of the rotating drum. A mounting box is provided at the lower end of the lifting rod, and a rangefinder is provided inside the mounting box. One end of the rangefinder is located on the central axis of the furnace body.

[0007] Furthermore, the inner clamping plate is provided with a hanging plate on its upper part. The hanging plate is integrally formed with the inner clamping plate. When the centering device is installed, the hanging plate is hung on the furnace opening at the upper part of the furnace lining.

[0008] Furthermore, a level is provided on one side of the nut to monitor the installation accuracy of the centering device.

[0009] Furthermore, the rotating drum has a hollow structure, and the boom is slidably installed inside the rotating drum. A locking knob is threadedly connected to one side of the rotating drum, and the screw of the locking knob abuts against the boom to adjust the height of the boom.

[0010] Furthermore, the boom is provided with external threads, and the upper end of the boom is threaded with an anti-fall baffle. After adjusting the height of the boom by tightening the locking knob, the anti-fall baffle is rotated until its lower end face is in contact with the upper end face of the rotating drum.

[0011] Furthermore, the mounting box is equipped with a positioning plate, one side of the rangefinder is in close contact with the positioning surface of the positioning plate, and the positioning surface is located on the central axis of the boom.

[0012] Furthermore, the mounting box has an end cover on one side, which is detachably connected to the mounting box by fasteners. The end cover has a through hole for the rangefinder to measure distances, and a number of second springs are provided on one side of the end cover, with one end of the second spring abutting against the distance measuring device.

[0013] The beneficial effects of this utility model are: (1) This utility model uses a centering device to accurately find the center position of the furnace lining, and then uses a rangefinder to accurately measure the inner diameter of the furnace lining. The thickness of the furnace lining can be obtained by using the difference method. In addition, by rotating the handwheel, the rotating drum drives the hanging rod and the rangefinder to rotate, and the thickness of the furnace lining at different positions on the same plane can be obtained, realizing multi-point measurement with one clamping.

[0014] (2) By setting a hanging plate on the upper part of the inner plate, the measuring tool is hung at the furnace mouth of the furnace lining, thus avoiding the measuring tool from falling into the furnace lining due to accidental loosening.

[0015] (3) By setting up a level, the installation accuracy of the centering device is ensured, thereby ensuring the accuracy of the furnace lining thickness measurement.

[0016] (4) The boom can extend and retract infinitely within the rotating drum, thereby adjusting the height of the rangefinder and measuring the thickness of the furnace lining at different heights. This expands the measurement range of the measuring tool and improves the overall efficiency of furnace lining thickness measurement.

[0017] (5) By setting up a fall arrestor, after adjusting the height of the boom by locking the knob, rotate the fall arrestor until the lower end face is in contact with the upper end face of the rotating drum, so as to avoid the boom falling from the inside of the rotating drum and causing damage to the rangefinder when the locking knob fails to lock.

[0018] (6) By setting a positioning plate inside the mounting box and setting a second spring on one side of the end cover, the rangefinder can be quickly and accurately positioned and installed, thus ensuring the measurement accuracy of the measuring tool. Attached Figure Description

[0019] Figure 1 This is a diagram showing the usage status of a tooling for measuring the thickness of a medium-frequency electric furnace lining according to this utility model.

[0020] Figure 2 This is a schematic diagram of a tooling structure for measuring the thickness of a medium-frequency electric furnace lining according to this utility model.

[0021] Figure 3 This is a schematic diagram of the centering device.

[0022] Figure 4 This is a partial sectional view of the nut.

[0023] Figure 5 This is a schematic diagram showing the connection between the hanger and the mounting box.

[0024] Figure 6 This is a sectional view of the mounting box.

[0025] In the diagram, 1. Furnace body; 2. Furnace lining; 3. Centering device; 31. Center rod; 32. Fixed seat; 33. First connecting rod; 34. Slide seat; 35. Second connecting rod; 36. Inner clamping plate; 37. Hanging plate; 38. First spring; 39. Screw sleeve; 4. Nut; 41. Bearing; 42. Level; 5. Rotary drum; 51. Handwheel; 52. Locking knob; 6. Hanging rod; 61. Anti-fall baffle; 7. Mounting box; 71. End cover; 72. Second spring; 73. Positioning plate; 8. Rangefinder. Detailed Implementation

[0026] The following will be combined with the appendix Figures 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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, they should not be construed as limitations on this utility model.

[0028] like Figure 1 As shown, a fixture for measuring the thickness of a medium-frequency electric furnace lining includes a centering device 3 for determining the center of the furnace body 1, such as... Figure 3 As shown, the device includes a hollow central rod 31. A fixed base 32 is fixedly connected to the lower end of the central rod 31. Several first connecting rods 33 are pivotally connected to the fixed base 32 in the circumferential direction. A sliding block 34 is slidably connected to the upper part of the central rod 31. Several second connecting rods 35 are pivotally connected to the sliding block 34 in the circumferential direction. The other ends of the corresponding first connecting rods 33 and second connecting rods 35 are pivotally connected, and an inner clamping plate 36 is connected at the pivot point of the first connecting rods 33 and second connecting rods 35. A first spring 38 is provided between the fixed base 32 and the sliding block 34. A threaded sleeve 39 is threadedly connected to the upper part of the central rod 31. By rotating the threaded sleeve 39, the distance between the sliding block 34 and the fixed base 32 is adjusted, so that multiple inner clamping plates 36 simultaneously fit tightly against the inner wall of the furnace lining 2, thereby achieving precise positioning of the measuring fixture. It also includes a nut 4, which is threadedly connected to the upper end of the central rod 31; a rotating drum 5 is rotatably connected inside the nut 4 via a bearing 41, and a handwheel 51 is provided at the upper end of the rotating drum 5, such as... Figure 2 As shown, a lifting rod 6 is provided on one side of the rotating drum 5, and a mounting box 7 is provided at the lower end of the lifting rod 6. A rangefinder 8 is provided inside the mounting box 7. One end of the rangefinder 8 is located on the central axis of the furnace body 1. The rangefinder 8 is a commercially available mature product, such as the DL331040D laser rangefinder 8. Its structure and principle will not be described in detail.

[0029] When measuring the thickness of furnace lining 2, the centering device 3 is first installed inside the furnace lining 2. Under the action of the centering device 3, the center rod 31 is located at the center of the furnace body 1. The distance from the center of the furnace body 1 to the inner wall of the furnace lining 2 (i.e., the inner diameter of the furnace lining 2) is measured using the rangefinder 8. Then, the measured value is subtracted from the known radius of the outer wall of the furnace lining 2 to obtain the thickness of the furnace lining 2, thus ensuring the accuracy of the furnace lining 2 thickness measurement. By rotating the handwheel 51, the rotating cylinder 5 drives the hanging rod 6 and the rangefinder 8 to rotate, so that the thickness of the furnace lining 2 at different positions on the same plane can be obtained, realizing multi-point measurement with one clamping.

[0030] like Figure 1 , Figure 3As shown, the inner clamping plate 36 is provided with a hanging plate 37 on the upper part. The hanging plate 37 is integrally formed with the inner clamping plate 36. When the centering device 3 is installed, the hanging plate 37 is hung on the furnace opening at the upper part of the furnace lining 2, which prevents the measuring tool from falling into the furnace lining 2 due to accidental loosening.

[0031] like Figure 4 As shown, a level 42 is provided on one side of the nut 4 to monitor the installation accuracy of the centering device 3, ensuring that the center rod 31 is in a vertical state, thereby ensuring the measurement accuracy of the tooling.

[0032] like Figure 4 As shown, the rotating cylinder 5 has a hollow structure, as... Figure 2 As shown, the lifting rod 6 is slidably installed inside the rotating drum 5. A locking knob 52 is threadedly connected to one side of the rotating drum 5. The screw of the locking knob 52 abuts against the lifting rod 6 to adjust the height of the lifting rod 6, thereby adjusting the height of the rangefinder 8, and realizing the thickness measurement of the furnace lining 2 at different height positions.

[0033] like Figure 5 As shown, the boom 6 has an external thread, and the upper end of the boom 6 is threadedly connected to an anti-fall baffle 61. After adjusting the height of the boom 6 with the locking knob 52, the anti-fall baffle 61 is rotated until its lower end face is in contact with the upper end face of the rotating drum 5, thus preventing the boom 6 from falling out of the rotating drum 5 and causing damage to the rangefinder 8 when the locking knob 52 fails to lock.

[0034] like Figure 6 As shown, the mounting box 7 is equipped with a positioning plate 73 inside. One side of the rangefinder 8 is in close contact with the positioning surface of the positioning plate 73, and the positioning surface is located on the central axis of the hanger 6. The positioning plate 73 facilitates the rapid and accurate positioning of the rangefinder 8.

[0035] like Figure 6 As shown, the mounting box 7 has an end cover 71 on one side. The end cover 71 is detachably connected to the mounting box 7 by fasteners. The end cover 71 has a through hole for the rangefinder 8 to measure. A number of second springs 72 are provided on one side of the end cover 71. One end of the second spring 72 abuts against the distance measuring device, ensuring that the rangefinder 8 and the positioning surface of the positioning plate 73 remain in contact, thereby ensuring the measurement accuracy of the measuring fixture.

[0036] The above content is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the scope defined by the structure of the utility model, they should all fall within the protection scope of this utility model.

Claims

1. A fixture for measuring the thickness of a medium-frequency electric furnace lining, comprising: A centering device for determining the center of a furnace body, characterized in that the centering device includes a hollow central rod, a fixed base is fixedly connected to the lower end of the central rod, a plurality of first connecting rods are pivotally connected to the fixed base in the circumferential direction, a sliding seat is slidably connected to the upper part of the central rod, a plurality of second connecting rods are pivotally connected to the sliding seat in the circumferential direction, the other ends of the corresponding first connecting rods and second connecting rods are pivotally connected, and an inner clamping plate is connected at the pivot point of the first connecting rods and second connecting rods, a first spring is provided between the fixed base and the sliding seat, and a threaded sleeve is threadedly connected to the upper part of the central rod; A nut is threadedly connected to the upper end of the central rod; inside the nut, a rotating drum is rotatably connected via a bearing. A handwheel is provided at the upper end of the rotating drum, and a lifting rod is provided on one side of the rotating drum. A mounting box is provided at the lower end of the lifting rod, and a rangefinder is provided inside the mounting box. One end of the rangefinder is located on the central axis of the furnace body.

2. The fixture for measuring the thickness of a medium-frequency electric furnace lining according to claim 1, characterized in that, The inner clamping plate is provided with a hanging plate at the upper part. The hanging plate is integrally formed with the inner clamping plate. When the centering device is installed, the hanging plate is hung on the furnace opening at the upper part of the furnace lining.

3. The fixture for measuring the thickness of a medium-frequency electric furnace lining according to claim 1, characterized in that, A level is provided on one side of the nut to monitor the installation accuracy of the centering device.

4. The fixture for measuring the thickness of a medium-frequency electric furnace lining according to claim 1, characterized in that, The rotating drum is a hollow structure, and the boom is slidably installed inside the rotating drum. A locking knob is threadedly connected to one side of the rotating drum. The screw of the locking knob abuts against the boom and is used to adjust the height of the boom.

5. The fixture for measuring the thickness of a medium-frequency electric furnace lining according to claim 4, characterized in that, The boom has external threads, and the upper end of the boom is threaded with an anti-fall baffle. After adjusting the height of the boom by tightening the locking knob, rotate the anti-fall baffle until the lower end face is in contact with the upper end face of the rotating drum.

6. A tooling for measuring the thickness of a medium-frequency electric furnace lining according to any one of claims 1-5, characterized in that, The mounting box is equipped with a positioning plate. One side of the rangefinder is in close contact with the positioning surface of the positioning plate, and the positioning surface is located on the central axis of the boom.

7. The fixture for measuring the thickness of a medium-frequency electric furnace lining according to claim 6, characterized in that, The mounting box has an end cover on one side, which is detachably connected to the mounting box by fasteners. The end cover has a through hole for the rangefinder to measure distances. A number of second springs are provided on one side of the end cover, with one end of each second spring abutting against the distance measuring device.

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