A large cylinder inner diameter measuring tool suitable for diameter measurement of inner wall of electric furnace

Abstract

The utility model belongs to diameter measuring tool technical field relates to a kind of large cylindrical inner diameter measuring tool suitable for diameter measurement of electric furnace inner wall, including support, the support is used to measure operation and is set in the electric furnace mouth;The center of support can be detachably connected guide rod, and the axial both ends of guide rod are respectively installed one bearing, wherein top bearing is interference fit with pipe clamp, and pipe clamp can rotate freely relative to guide rod;Hollow tube is slidably arranged in the guide rod inner hole, and the surface of hollow tube is provided with scale line along vertical direction, and pipe clamp can position and clamp hollow tube in specific position;The lower end of the hollow tube is downwardly extended after penetrating the lower end of guide rod bearing, and ranging probe is installed at the lower end of hollow tube, and hand wheel is installed at the upper end of hollow tube, and the edge of hand wheel disc is provided with angle scale line.The tool is convenient to operate, and measurement precision is high, and operator can measure quickly from each depth and direction of electric furnace bottom, middle and top.

Description

Technical Field

[0001] This utility model belongs to the technical field of diameter measuring tools, and relates to a large cylindrical inner diameter measuring tool suitable for measuring the inner diameter of the inner wall of an electric furnace. Background Technology

[0002] Medium-frequency electric furnaces are widely used in the production of cast steel and cast iron. The furnace interior is sintered with high-temperature resistant lining materials. Under the influence of electromagnetic force, molten metal churns within the lining. The lining is gradually worn and eroded by mechanical erosion and chemical reactions, causing it to thin. If the lining is too thin, it is prone to cracking during use, allowing molten metal to leak out, damaging the furnace and threatening the safety of equipment and workers. To ensure safe operation, when using dry-rammed refractory materials for furnace construction, the bottom of the furnace is generally thick and equipped with a stainless steel grounding probe. If cracks or leaks occur at the bottom, an alarm will sound immediately. However, grounding probes are not installed on the side walls of the lining. The furnace lining thickness must be checked manually and frequently. The wall thickness can be calculated by measuring the inner diameter of the lining. If the wall thickness is less than the experienced safe thickness value, the lining must be removed and the furnace rebuilt.

[0003] Because the most severely eroded parts of the electric furnace are often located in the lower and middle sections, and the bottom of the furnace becomes uneven in the later stages of use, it is very inconvenient for workers to stand at the bottom of the furnace to measure the inner diameter. The simple tools currently used also have relatively low accuracy. The inner wall of the electric furnace needs to be measured in multiple directions and at different depths, but due to the inconvenience, workers often only measure a few points to calculate the furnace lining thickness. This causes two problems: firstly, the thinnest part of the furnace lining is not measured, which can easily lead to furnace penetration accidents after the furnace is started; secondly, management personnel worry that the thinnest part of the lining has not been measured, and therefore stipulate that the furnace be dismantled when the lining thickness is still relatively thick, resulting in unnecessary waste. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a large cylindrical inner diameter measuring tool suitable for measuring the inner diameter of an electric furnace. This tool is easy to operate, has high measurement accuracy, and allows operators to quickly measure from various depths and directions at the bottom, middle, and top of the electric furnace.

[0005] According to the technical solution of this utility model: a large cylindrical inner diameter measuring tool suitable for measuring the inner wall diameter of an electric furnace, characterized in that: it includes a bracket, which is used to be clamped at the furnace opening during the measurement operation; The bracket has a detachable guide rod at its center. A bearing is installed at each of the two axial ends of the guide rod. The top bearing is interference-fitted with the pipe clamp, allowing the pipe clamp to rotate freely relative to the guide rod. The hollow tube is slidably disposed in the inner hole of the guide rod, and the surface of the hollow tube is provided with scale lines arranged in the vertical direction. The tube clamp can position and clamp the hollow tube at a specific position. The lower end of the hollow tube extends downward after passing through the lower bearing of the guide rod, and a ranging probe is installed at the lower end of the hollow tube. A handwheel is installed at the upper end of the hollow tube, and the edge of the handwheel disc is provided with angle scale lines.

[0006] As a further improvement of this utility model, the support includes a disc, and several positioning plates are evenly distributed on the bottom surface of the disc along the circumferential direction. During the measurement operation, the disc is supported on the upper surface of the electric furnace opening, and the positioning plates are locked onto the inner wall of the furnace opening.

[0007] As a further improvement of this utility model, a liquid crystal display screen is fixed in the middle of the handwheel, a switch is installed on the handwheel, and a detachable rechargeable battery pack is fitted on the handwheel; the rechargeable battery pack, liquid crystal display screen and switch are connected by wires.

[0008] As a further improvement of this utility model, the inner wall of the disc is supported by multiple spokes, and a clamping element is provided at the intersection of the multiple spokes to clamp the guide rod.

[0009] As a further improvement of this utility model, the clamping component includes two mutually cooperating arc plates, and a locking bolt is threaded to the top of each arc plate.

[0010] As a further improvement of this utility model, four positioning plates are evenly distributed along the circumference of the bottom surface of the disc, and each positioning plate is an arc plate.

[0011] The technical advantage of this utility model is that it combines a laser ranging probe device, a pipe clamp fixing device, a hollow tube with graduations, and a handwheel with angle graduations to achieve the measurement of the axial and radial dimensions of a large cylinder with a measurement accuracy of up to 1 mm. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the support structure in this utility model.

[0014] Figure 3 This is a schematic diagram of the guide rod in this utility model.

[0015] Figure 4 This is a structural schematic diagram of the measurement state of this utility model. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0018] Figure 1-4 The components include bracket 1, positioning plate 1-1, spokes 1-2, guide rod 2, distance measuring probe 3, clamping parts 4, arc plate 4-1, locking bolts 4-2, hollow tube 5, pipe clamp 6, handwheel 7, etc.

[0019] like Figure 1-4 As shown, this utility model is a tool for measuring the inner diameter of a large cylinder suitable for measuring the inner diameter of an electric furnace. It is suitable for measuring the inner diameter of cylinders with an inner diameter of 15cm or more. The structure includes a bracket 1, which is used to be clamped at the furnace opening during the measurement operation.

[0020] The center of the bracket 1 is detachably connected to the guide rod 2. A bearing is installed at each of the two axial ends of the guide rod 2. The top bearing is interference-fitted with the pipe clamp 6, and the pipe clamp 6 can rotate freely relative to the guide rod 2.

[0021] The hollow tube 5 is slidably disposed in the inner hole of the guide rod 2. The surface of the hollow tube 5 is provided with scale lines arranged in the vertical direction. The tube clamp 6 can position and clamp the hollow tube 5 at a specific position.

[0022] The lower end of the hollow tube 5 extends downwards after passing through the lower bearing of the guide rod 2, and a ranging probe 3 is installed at the lower end of the hollow tube 5. A handwheel 7 is installed at the upper end of the hollow tube 5, and the edge of the handwheel 7 has angle scale lines. The lower bearing restricts the hollow tube 5 from moving inside, preventing it from shaking. There is a gap of approximately 0.3mm on one side between the hollow tube 5 and the inner ring of the lower bearing. The ranging probe 3 is a laser ranging probe.

[0023] The support 1 includes a disc, and several positioning plates 1-1 are evenly distributed on the bottom surface of the disc along the circumference. During the measurement operation, the disc is supported on the upper surface of the electric furnace opening, and the positioning plates 1-1 are locked onto the inner wall of the furnace opening.

[0024] In practice, four positioning plates 1-1 are evenly distributed along the circumference of the bottom surface of the disc, and each positioning plate 1-1 is an arc plate. During the measurement operation, the four positioning plates 1-1 are precisely locked inside the furnace opening to ensure that the invention does not move and that the distance measuring probe 3 is positioned at the center of the furnace body to be measured.

[0025] A centrally mounted LCD screen is located on the handwheel 7. A switch is installed on the handwheel 7, and a detachable rechargeable battery pack is also mounted on the handwheel 7. The rechargeable battery pack, LCD screen, and switch are connected by wires. The measurement data from the ranging probe 3 can be displayed on the LCD screen.

[0026] Multiple spokes 1-2 are provided on the inner wall of the disc for support. Clamping elements 4 are provided at the intersections of the multiple spokes 1-2 to clamp the guide rod 2. In practice, there are four spokes 1-2.

[0027] The clamping component 4 includes two interlocking arc plates 4-1, each of which is threaded with a locking bolt 4-2 at its top. In use, the lower end of the guide rod 2 is placed between the two arc plates 4-1, and the locking bolts 4-2 are tightened to clamp and position the guide rod 2.

[0028] The measuring tool described in this patent has the following advantages: 1. Simple manufacturing. The bottom circular bracket is customized according to the required furnace opening size, and other key components can be purchased on the market, making assembly simple. 2. Convenient use. First, adjust the ranging probe device to be horizontal with the furnace platform, record the hollow tube scale value at the pipe clamp position, open the pipe clamp, lower the laser ranging probe to the middle of the furnace, close the pipe clamp, record the hollow tube scale value again, press the laser ranging probe switch in the middle of the handwheel, and the radius of the furnace sidewall will be displayed on the LCD screen. Rotating the handwheel from 0° to 360° will change the distance value displayed on the LCD screen, making it easy to find the thinnest point of the furnace lining sidewall. 3. High accuracy. Using the large cylindrical inner diameter measuring tool described in this patent, the furnace lining thickness can be measured accurately to 1mm, which is of great significance for the safe use of the electric furnace and the accurate assessment of the furnace lining life.

[0029] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A tool for measuring the inner diameter of a large cylindrical body suitable for measuring the inner wall diameter of an electric furnace, characterized in that: Includes a bracket (1), which is used to be clamped at the furnace opening during measurement operations; The center of the bracket (1) is detachably connected to the guide rod (2). A bearing is installed at each of the two axial ends of the guide rod (2). The top bearing is interference-fitted with the pipe clamp (6), and the pipe clamp (6) can rotate freely relative to the guide rod (2). The hollow tube (5) is slidably disposed in the inner hole of the guide rod (2). The surface of the hollow tube (5) is provided with scale lines arranged in the vertical direction. The tube clamp (6) can position and clamp the hollow tube (5) at a specific position. The lower end of the hollow tube (5) extends downward after passing through the lower bearing of the guide rod (2), and a ranging probe (3) is installed at the lower end of the hollow tube (5). A handwheel (7) is installed at the upper end of the hollow tube (5), and the edge of the handwheel (7) is provided with angle scale lines.

2. The large cylindrical inner diameter measuring tool for measuring the inner wall diameter of an electric furnace as described in claim 1, characterized in that: The support (1) includes a disc, and several positioning plates (1-1) are evenly distributed on the bottom surface of the disc along the circumferential direction. During the measurement operation, the disc is supported on the upper surface of the furnace opening, and the positioning plates (1-1) are locked in the inner wall of the furnace opening.

3. The large cylindrical inner diameter measuring tool for measuring the inner wall diameter of an electric furnace as described in claim 1, characterized in that: The handwheel (7) has a fixed LCD screen in the middle, a switch installed on the handwheel (7), and a detachable rechargeable battery pack. The rechargeable battery pack, LCD screen and switch are connected by wires.

4. The large cylindrical inner diameter measuring tool for measuring the inner wall diameter of an electric furnace as described in claim 2, characterized in that: The inner wall of the disc is supported by multiple spokes (1-2), and a clamping element (4) is provided at the intersection of the multiple spokes (1-2) to clamp the guide rod (2).

5. The large cylindrical inner diameter measuring tool for measuring the inner wall diameter of an electric furnace as described in claim 4, characterized in that: The clamping component (4) includes two mutually cooperating arc plates (4-1), and a locking bolt (4-2) is threaded to the top of each arc plate (4-1).

6. The large cylindrical inner diameter measuring tool for measuring the inner wall diameter of an electric furnace as described in claim 2, characterized in that: Four positioning plates (1-1) are evenly distributed along the circumference on the bottom surface of the disc, and each positioning plate (1-1) is an arc plate.

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