Device for measuring thickness of RH furnace steel slag

Abstract

The utility model provides a device for measuring the thickness of RH furnace steel slag, which comprises a telescoping mechanism, a clamping mechanism and a measuring steel bar, the clamping mechanism comprises a clamping ring and a fastening assembly, the telescoping mechanism is telescopically arranged along the extension direction of the telescoping mechanism, the clamping ring is fixed at one end of the telescoping mechanism, the clamping ring is provided with a through hole penetrating along the vertical direction, and the measuring steel bar is fixed on the clamping ring. The measuring steel bar is connected in the through hole, the fastening assembly is adjustably arranged on the clamping ring, and the fastening assembly abuts against the measuring steel bar so that the measuring steel bar can be fixed in the through hole. The thickness of the steel slag is obtained by measuring the redness of the steel bar immersed in the steel slag and then measuring the length of the redness part, so that the steel bar to be measured has reusability after being cooled, the use cost is greatly saved, frequent replacement is not needed, the redness part measurement is more visual and more accurate than the fused part measurement, meanwhile, the steel bar source is simple, batch production is not needed, and the production cost is reduced. And by means of the fastening assembly, installation is stable during measurement, deviation is avoided, and the measurement accuracy is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of steelmaking, in particular to a device for measuring the thickness of RH furnace slag. Background Art

[0002] RH furnace is a kind of molten steel refining equipment with vacuum argon blowing and circulating degassing. It is mainly used to produce low-carbon, low-nitrogen and low-hydrogen steels, such as steel for large forgings, thick plate steel, silicon steel, bearing steel, etc. It is an indispensable and important process in steelmaking production.

[0003] In the RH smelting process, measuring the slag thickness is an indispensable link. The thickness of the top slag of the molten steel in the RH furnace after the converter smelting is completed should not be greater than 150mm. If the slag thickness is not measured, under abnormal circumstances, the slag is too thick, the immersion tube is not inserted into the molten steel deeply enough or is not inserted into the molten steel at all. When the vacuum tank is evacuated, a large amount of slag will be pumped to the top of the vacuum chamber and the hot bend pipe, causing a slag suction accident. The slag suction accident is a major process accident in the RH treatment process. At the least, it will cause unstable control of the molten steel composition; at the worst, it will cause damage to equipment such as oxygen lances, vacuum tanks, and hot bend pipes, resulting in production suspension and irreparable losses.

[0004] Existing devices for measuring the thickness of slag, such as a scale for measuring the thickness of slag proposed in the published Chinese patent CN201438099U, are inserted into molten steel or molten iron. The molten steel or molten iron melts both the high-melting-point material plate and the low-melting-point material plate, while the slag can only melt the low-melting-point material plate. The thickness of the slag can be determined more accurately from the length difference between the two material plates.

[0005] However, the above-mentioned device for measuring the thickness of slag has to melt and consume a ruler each time the thickness of slag is measured, which is very costly in the long run. In addition, if part of the structure is not fully melted or over-melted during melting, measurement errors may occur.

[0006] In view of this, it is necessary to propose a device for measuring the thickness of RH furnace slag to solve or at least alleviate the above defects. Utility Model Content

[0007] The main purpose of the utility model is to provide a device for measuring the thickness of RH furnace slag, so as to solve the problem that the devices for measuring the thickness of slag in the prior art consume a large number of devices and are prone to measurement errors.

[0008] To achieve the above-mentioned purpose, the utility model provides a device for measuring the thickness of RH furnace slag, comprising a telescopic mechanism, a clamping mechanism and a measuring steel bar; wherein:

[0009] The clamping mechanism includes a clamping ring and a fastening assembly. The telescopic mechanism is telescopically arranged along its own extension direction. The clamping ring is fixed to one end of the telescopic mechanism. The clamping ring has a through hole that passes through vertically. The measuring steel bar is connected in the through hole. The fastening assembly is adjustably arranged on the clamping ring. The fastening assembly abuts against the measuring steel bar to fix the measuring steel bar in the through hole.

[0010] Preferably, the fastening assembly comprises a plurality of fastening bolts, a plurality of bolt holes are circumferentially formed on the side wall of the clamping ring, the bolt holes are radially extending along the clamping ring, and the fastening bolts are adjustably arranged in the bolt holes.

[0011] Preferably, the telescopic mechanism includes a handle portion and a telescopic portion, the handle portion has a slide groove extending along its length direction, the first end of the telescopic portion is slidably connected to the slide groove, and the clamping ring is fixed to the second end of the telescopic portion.

[0012] Preferably, the telescopic mechanism also includes two limit assemblies vertically oppositely arranged at the first end of the telescopic part, each of the limit assemblies includes a spring and a limit button, and the handle part is provided with two limit holes vertically oppositely arranged at one end close to the telescopic part, wherein one end of the spring is fixed to the first end of the telescopic part, and the other end of the spring is fixedly connected to the limit button, and the limit button can be vertically set back and forth in the limit hole through the spring.

[0013] Preferably, the melting point of the measured steel bar is 1500°C to 1530°C.

[0014] Preferably, the length of the measuring steel bar is greater than the depth of the slag.

[0015] Preferably, the length of the measuring steel bar is 40 cm to 50 cm.

[0016] Preferably, the diameter of the measuring steel bar is 0.5 cm to 1 cm.

[0017] Preferably, the number of the fastening bolts is four, and the four fastening bolts are arranged at intervals along the circumference of the clamping ring.

[0018] Preferably, the clamping ring is fixed to the second end of the telescopic portion by welding.

[0019] Compared with the prior art, the utility model provides the following beneficial effects:

[0020] The utility model provides a device for measuring the thickness of RH furnace slag, comprising a telescopic mechanism, a clamping mechanism and a measuring steel bar, the clamping mechanism comprising a clamping ring and a fastening assembly, the telescopic mechanism can be telescopically arranged along its own extension direction, the clamping ring is fixed to one end of the telescopic mechanism, the clamping ring has a through hole penetrating in the vertical direction, the measuring steel bar is connected in the through hole, the fastening assembly is adjustably arranged on the clamping ring, and the fastening assembly is abutted against the measuring steel bar to fix the measuring steel bar in the through hole. The measuring steel bar is immersed in the steel slag and turns red, and then the length of the red part is measured to obtain the thickness of the steel slag, so that the steel bar to be measured can be reused after cooling, which greatly saves the use cost, does not need to be frequently replaced, and the measurement of the red part is more intuitive than the melted part, and the measurement is more accurate. At the same time, the source of the steel bar is simple, which is different from the need to mass-produce rulers in the prior art, saving costs, and the fastening assembly can make the installation stable during measurement to avoid deviation, thereby ensuring the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 It is a three-dimensional schematic diagram of the overall structure in one embodiment of the utility model;

[0023] Figure 2 It is a schematic plan view of the overall structure of an embodiment of the utility model;

[0024] Figure 3 for Figure 2 Schematic diagram of the cross section along the AA direction;

[0025] Figure 4 It is a schematic elevation view of an application scenario of measuring the thickness of slag for the overall structure in one embodiment of the utility model.

[0026] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

[0027] Description of Figure Numbers:

[0028] 10. Clamping mechanism; 110. Clamping ring; 111. Through hole; 120. Fastening assembly; 121. Fastening bolt; 20. Telescopic mechanism; 210. Handle portion; 211. Slide groove; 220. Telescopic portion; 230. Limiting assembly; 231. Spring; 232. Limiting button; 30. Measuring steel bars. DETAILED DESCRIPTION

[0029] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] Please refer to the attached Figure 1-4 In one embodiment of the present invention, a device for measuring the thickness of RH furnace slag is provided, comprising a telescopic mechanism 20, a clamping mechanism 10 and a measuring steel bar 30. First of all, it should be noted that, unlike the device for measuring the thickness of slag in the prior art, a ruler must be melted and consumed each time the thickness of the slag is measured, which is costly in the long run, and when melting, if part of the structure is not fully melted or over-melted, measurement errors may occur. The present application solves the above-mentioned defects in the prior art by providing a device for measuring the thickness of RH furnace slag. The details are as follows:

[0034] The clamping mechanism 10 includes a clamping ring 110 and a fastening assembly 120. The telescopic mechanism 20 is telescopically arranged along its own extension direction. The clamping ring 110 is fixed to one end of the telescopic mechanism 20. The clamping ring 110 has a through hole 111 that passes through vertically. The measuring steel bar 30 is connected in the through hole 111. The fastening assembly 120 is adjustably arranged on the clamping ring 110. The fastening assembly 120 abuts against the measuring steel bar 30 to fix the measuring steel bar 30 in the through hole 111.

[0035] Specifically, the device for measuring the thickness of RH furnace slag in the present application includes a telescopic mechanism 20, a clamping mechanism 10 and a measuring steel bar 30. The measuring steel bar 30 is used to be vertically inserted into and penetrate the slag to immerse in the molten steel. After a sufficient period of time, the portion located in the slag will turn red, and the thickness of the slag can be obtained by measuring the length of the reddened portion; the clamping mechanism 10 is used to clamp and fix the measuring steel bar 30, and the telescopic mechanism 20 is used for the technician to hold and operate. Considering that the temperature is higher as it is closer to the ladle, the telescopic mechanism 20 is telescopically arranged along its own extension direction, so that the technician can adjust the telescopic length, thereby avoiding the technician being too close to high temperature areas during measurement.

[0036] The clamping mechanism 10 includes a clamping ring 110 and a fastening assembly 120. The clamping ring 110 is used for installing the measuring steel bar 30. Therefore, a through hole 111 is vertically penetrated inside the clamping ring 110, so that the clamping ring 110 is arranged horizontally when installed and fixed, and the measuring steel bar 30 can extend vertically in a vertical state, so that it is convenient for technicians to determine that the measuring steel bar 30 is vertically inserted when inserted into the slag to ensure the measurement accuracy; and the fastening assembly 120 is used to further fasten the measuring steel bar 30 when the measuring steel bar 30 is installed, so as to avoid the measuring steel bar 30 from slipping and deflecting due to unstable installation, thereby affecting the measurement accuracy. Therefore, it is adjustably arranged on the clamping ring 110. When the measuring steel bar 30 is installed in the clamping ring 110, the fastening assembly 120 is adjusted so that the fastening assembly 120 and the measuring steel bar 30 are abutted against each other, so as to fix the measuring steel bar 30 in the through hole 111.

[0037] As a preferred embodiment of the present invention, the fastening assembly 120 includes a plurality of fastening bolts 121, the side wall of the clamping ring 110 is circumferentially provided with a plurality of bolt holes, the bolt holes are radially extended along the clamping ring 110, and the fastening bolts 121 are adjustably arranged in the bolt holes.

[0038] It should be noted that the fastening bolt 121 is easy to adjust. A plurality of bolt holes extending radially are opened circumferentially on the side wall of the clamping ring 110 to ensure that the fastening bolt 121 can be adjusted and moved radially. When the measuring steel bar 30 needs to be fastened, the fastening bolt 121 is tightened to hold the measuring steel bar 30 to achieve the purpose of fastening. It is worth mentioning that in addition to fastening the measuring steel bar 30, if some steel bars are too small to be installed, they can also be fastened by the fastening bolt 121, thereby increasing the adaptability of the entire device to the requirements of the steel bar diameter range, further providing convenience for material collection and saving costs.

[0039] As a preferred embodiment of the present invention, the telescopic mechanism 20 includes a handle portion 210 and a telescopic portion 220. The handle portion 210 has a slide groove 211 extending along its length direction. The first end of the telescopic portion 220 is slidably connected to the slide groove 211, and the clamping ring 110 is fixed to the second end of the telescopic portion 220.

[0040] It should be noted that the handle portion 210 is used for technicians to hold and operate, and in order to ensure that the telescopic portion 220 achieves the telescopic effect, the handle portion 210 has a slide groove 211 extending along its own length direction, and the slide groove 211 is used for the telescopic portion 220 to slide, so that the first end of the telescopic portion 220 can be slidably connected to the slide groove 211. When the technician wants to avoid the influence of high temperature when measuring, the extension portion can be pulled out and then the slag thickness can be measured. When not in use, the telescopic portion 220 can be retracted for easy storage.

[0041] As a preferred embodiment of the utility model, the telescopic mechanism 20 also includes two limit assemblies 230 vertically oppositely arranged at the first end of the telescopic part 220, each of the limit assemblies 230 includes a spring 231 and a limit button 232, and the handle part 210 is provided with two limit holes vertically oppositely arranged at one end close to the telescopic part 220, wherein one end of the spring 231 is fixed to the first end of the telescopic part 220, and the other end of the spring 231 is fixedly connected to the limit button 232, and the limit button 232 can be vertically arranged back and forth in the limit hole through the spring 231.

[0042] It is worth noting that the limit assembly 230 is used to limit the displacement of the telescopic part 220 to ensure that the telescopic part 220 can be fixed after being extended to a certain length, so as to avoid the telescopic part 220 sliding back and forth, thereby affecting the measurement; wherein each of the limit assemblies 230 includes a spring 231 and a limit button 232, and the limit button 232 plays a role of limiting, by providing two limit holes arranged vertically opposite to each other at one end of the handle part 210 close to the telescopic part 220, when the telescopic part 220 extends outward to a certain extent so that the limit button 232 is stuck in the limit hole to form a limit, and the spring 231 is used to realize the vertical back and forth displacement of the limit button 232. When it is necessary to move, the limit button 232 is pressed to make the limit button 232 retract into the telescopic part 220; when it is necessary to reset, the limit button 232 is driven to the limit hole, and the reset function is formed by the spring 231 so that the limit button 232 is stuck in the limit hole to form a limit.

[0043] As a preferred embodiment of the present invention, the melting point of the measuring steel bar 30 is 1500°C to 1530°C.

[0044] It is worth noting that the melting point of the measuring steel bar 30 needs to be greater than the temperature of the steel slag to ensure that the portion of the measuring steel bar 30 inserted into the steel slag will not melt but remain in a reddened state. Therefore, in this application as a preferred embodiment, the melting point of the measuring steel bar 30 is 1500°C to 1530°C, and technicians in this field can make a choice based on actual conditions.

[0045] Furthermore, the length of the measuring steel bar 30 is greater than the depth of the slag.

[0046] It should be noted that this is done to ensure that the reddened portion of the measured steel bar 30 is sufficient to show the thickness of the slag to avoid incomplete measurement.

[0047] Furthermore, the length of the measuring steel bar 30 is 40 cm to 50 cm.

[0048] It should be understood that, considering the thickness of the slag and the convenience of operation, preferably, the length of the measuring steel bar 30 can be set to 40 cm to 50 cm, and those skilled in the art can set it according to actual needs.

[0049] Furthermore, the diameter of the measuring steel bar 30 is 0.5 cm to 1 cm.

[0050] It should be noted that if the diameter of the measuring steel bar 30 is too small, it will cause the measuring steel bar 30 to melt too quickly, while if it is too large, it will cause inconvenience in operation and cannot be installed in the clamping ring 110. Therefore, preferably, the diameter of the measuring steel bar 30 is 0.5 cm to 1 cm.

[0051] Furthermore, the number of the fastening bolts 121 is four, and the four fastening bolts 121 are arranged at intervals along the circumference of the clamping ring 110 .

[0052] It should be noted that the four fastening bolts 121 can evenly fasten the measuring steel bar 30 from four directions, thereby achieving a better fastening effect.

[0053] Furthermore, the clamping ring 110 is fixed to the second end of the telescopic portion 220 by welding.

[0054] It can be understood that the connection method using welding is stable and easy to process.

[0055] To facilitate understanding by those skilled in the art, an operation flow in a preferred embodiment is described as follows:

[0056] First, open the ladle cover to the processing position (i.e., the position to be measured), then install the measuring steel bar 30 into the clamping ring 110 and keep 2 / 3 of it below the clamping ring 110, and tighten the fastening bolt 121 to hold the measuring steel bar 30 to complete the clamping and fastening, and hold the handle 210, extend the telescopic part 220 until the limit button 232 is stuck in the limit hole; at this time, vertically insert the entire measuring steel bar 30 into the steel slag, and the insertion depth is about 100mm to 200mm. At the same time, it should be noted that the insertion depth must be greater than the depth of the steel slag. , using the principle that the melting points of slag and molten steel are different, the part of the measuring steel bar 30 immersed in the molten steel will melt, while the part in the slag will heat up and turn red. After waiting for about 6 to 10 seconds, take it out. At this time, the part immersed in the molten steel has completely melted, and the remaining red part is the part immersed in the slag (it is worth mentioning that the part immersed in the molten steel does not need to be too much, which can save materials. It is mainly to ensure that the boundary between the melted part and the red part is more obvious to further ensure the measurement accuracy); finally, measure the red part on the measuring steel bar 30. The length of the red part is the thickness of the slag. For details, please refer to the attached Figure 4 .

[0057] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A device for measuring the thickness of RH furnace slag, characterized in that: It includes a telescopic mechanism, a clamping mechanism and a measuring steel bar; wherein, The clamping mechanism includes a clamping ring and a fastening assembly. The telescopic mechanism is telescopically arranged along its own extension direction. The clamping ring is fixed to one end of the telescopic mechanism. The clamping ring has a through hole that passes through vertically. The measuring steel bar is connected in the through hole. The fastening assembly is adjustably arranged on the clamping ring. The fastening assembly abuts against the measuring steel bar to fix the measuring steel bar in the through hole.

2. The device for measuring the thickness of RH furnace slag according to claim 1, characterized in that: The fastening assembly comprises a plurality of fastening bolts. The side wall of the clamping ring is provided with a plurality of bolt holes along the circumferential direction. The bolt holes are arranged to extend radially along the clamping ring. The fastening bolts are adjustably arranged in the bolt holes.

3. The device for measuring the thickness of RH furnace slag according to claim 1, characterized in that: The telescopic mechanism comprises a handle portion and a telescopic portion. The handle portion has a slide groove extending along its length direction. The first end of the telescopic portion is slidably connected to the slide groove, and the clamping ring is fixed to the second end of the telescopic portion.

4. The device for measuring the thickness of RH furnace slag according to claim 3, characterized in that: The telescopic mechanism also includes two limit assemblies vertically arranged opposite to each other at the first end of the telescopic part, each of the limit assemblies includes a spring and a limit button, and the handle part is provided with two limit holes vertically arranged opposite to each other at one end close to the telescopic part, wherein one end of the spring is fixed to the first end of the telescopic part, and the other end of the spring is fixedly connected to the limit button, and the limit button can be vertically arranged back and forth in the limit hole through the spring.

5. The device for measuring the thickness of RH furnace slag according to claim 1, characterized in that: The melting point of the measured steel bar is 1500°C to 1530°C.

6. The device for measuring the thickness of RH furnace slag according to claim 1, characterized in that: The length of the measuring steel bar is greater than the depth of the slag.

7. The device for measuring the thickness of RH furnace slag according to claim 6, characterized in that: The length of the measured steel bar is 40 cm to 50 cm.

8. The device for measuring the thickness of RH furnace slag according to claim 1, characterized in that: The diameter of the measured steel bar is 0.5 cm to 1 cm.

9. The device for measuring the thickness of RH furnace slag according to claim 2, characterized in that: The number of the fastening bolts is four, and the four fastening bolts are arranged at intervals along the circumference of the clamping ring.

10. The device for measuring the thickness of RH furnace slag according to claim 3, characterized in that: The clamping ring is fixed to the second end of the telescopic portion by welding.

Images