On-line nozzle replacing device for removing casting blank cutting nodules through pressure airflow

Abstract

The utility model provides an on-line nozzle replacement device for removing casting blank cutting nodules by pressure airflow, which relates to the technical field of continuous casting flame cutting guns, is matched with a casting blank and a continuous casting machine for use, and comprises a metal hose, an air delivery pipe, a fixed bolt, a movable sleeve, a fixed sleeve, a positioning rule and an air nozzle, the gas conveying pipe is clamped in the mode that the movable sleeve and the fixed sleeve are combined, meanwhile, the gas conveying pipe is fixed through the fixing bolt, the extending length of the gas nozzle is limited through the positioning ruler, and the problems that in the prior art, once the nozzle is burnt out in the cutting process, manual replacement is needed, the replacement difficulty is large under the high-temperature condition, and the cutting efficiency is high are solved. The device solves the problems of large influence on continuous casting production, realizes on-line rapid replacement of the cutting nozzle, reduces the difficulty and the working intensity of manual nozzle replacement at high temperature, and ensures stable operation of pouring production.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous casting flame cutting guns, in particular to an on-line replacement device for a gas nozzle that removes casting billet cutting tumors with pressured air flow. Background Art

[0002] In steel enterprises, continuous casting flame cutting guns are often used to cut steel. The continuous casting flame cutting gun is used to cut the straightened casting billet into the required specified length, or when a fault occurs on the continuous casting production line, such as steel leakage or the casting billet not being completely cut off, the continuous casting flame cutting gun needs to be used for cutting. The gas nozzle of the existing on-line flame cutting gun for continuous casting billets is easily burned out due to the high temperature of the production environment during the cutting process. After the nozzle is burned out, it will affect the production of steel mills and requires manual replacement. The temperature at the use position of the gas nozzle replacement device is about 800°C, and the gas pressure is 0.7MP. Maintenance operators replace it at a position 1.5 meters above the use position. The replacement position has a high temperature, and the construction difficulty of replacement is relatively large. Especially when the thread is damaged due to high temperature, it will affect production and even cause a casting break accident, which has a great impact on continuous casting production. Therefore, it is urgent to invent an on-line replacement device for a gas nozzle that removes casting billet cutting tumors with pressured air flow to solve the above problems. Content of the Utility Model

[0003] The utility model provides an on-line replacement device for a gas nozzle that removes casting billet cutting tumors with pressured air flow. The air delivery pipe is clamped by combining the movable sleeve and the fixed sleeve, and at the same time, the air delivery pipe is fixed by fixing bolts. The positioning ruler defines the protruding length of the gas nozzle, and the installation direction is parallel to the cutting surface and runs synchronously with the cutting trolley, solving the problem of on-line rapid replacement of the gas nozzle and ensuring production safety.

[0004] To solve the above problems, the utility model provides an on-line replacement device for a gas nozzle that removes casting billet cutting tumors with pressured air flow, which is used in cooperation with a casting blank and a continuous casting machine, and includes: a metal hose, an air delivery pipe, fixing bolts, a movable sleeve, a fixed sleeve, a positioning ruler and a gas nozzle. The fixed sleeve is fixedly welded on the continuous casting machine. The movable sleeve is inserted into the fixed sleeve and fixed by clamping. The positioning ruler is fixedly connected below the fixed sleeve, and the length of the positioning ruler is fixed by screws.

[0005] Preferably, the upper part of the movable sleeve is provided with a lifting groove in a "worker" structure. A conical cylinder is arranged below the lifting groove. A convex ring is arranged on the upper part of the conical cylinder. A first threaded hole is arranged in the middle of the conical cylinder. The lower part of the conical cylinder is a toothed structure.

[0006] Preferably, the fixing sleeve is a cylinder with a conical through hole structure on the inner side thereof, the aperture of the upper end of the conical through hole corresponds to the aperture of the upper end of the conical tube, the aperture of the lower end of the conical through hole is smaller than the aperture of the columnar structure at the lower part of the conical tube, the upper part of the conical through hole is provided with a groove corresponding to the size of the convex ring, the middle part of the fixing sleeve is provided with a threaded hole 2, and the aperture and position of the threaded hole 2 correspond to those of the threaded hole 1.

[0007] Preferably, the positioning ruler includes a fixing ring, a ruler sleeve, a ruler and screws, the fixing ring is arranged on the upper part of the positioning ruler, and the fixing ring is fixedly connected to the bottom of the fixing sleeve, the ruler sleeve is arranged below the fixing ring, the ruler is arranged in the ruler sleeve and fixed by screws, and the bottom of the ruler limits the air nozzle.

[0008] Preferably, the size of the fixing bolt corresponds to the threaded hole one and the threaded hole two.

[0009] Beneficial Effects

[0010] The utility model clamps and fixes the gas pipe by means of a movable sleeve and a fixed sleeve phase structure, and the installation and removal process of the movable sleeve is simple and easy to operate.

[0011] 1. The distance of the air nozzle installation is limited by the positioning ruler. The air nozzle is installed to meet the installation position requirements and the requirements for automatic cutting of the specified length of steel;

[0012] 2. The air nozzle is fixed for a second time through the locking structure of the movable sleeve and the fixing bolts. The "I"-shaped structure above the movable sleeve facilitates the removal of the movable sleeve, which ensures a firm and reliable installation while reducing the replacement time;

[0013] 3. The utility model has a simple structure and can realize the online rapid replacement of the cutting nozzle. The air nozzle is firmly and stably installed and the replacement procedure is simple and fast, which reduces the construction difficulty and work intensity of replacing the nozzle under artificial high temperature, ensures the stable operation of the cutting production, and improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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 embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 This is a planing diagram of the air nozzle online replacement device;

[0016] Figure 2 It is a structural schematic diagram of the activity set;

[0017] Figure 3 It is a structural schematic diagram of a fixed sleeve;

[0018] Figure 4 It is a structural schematic diagram of the positioning ruler;

[0019] In the figure: 1, metal hose, 2, air pipe, 3, fixing bolt, 4, movable sleeve, 5, fixed sleeve, 6, positioning ruler, 7, air nozzle, 401, pulling groove, 402, tapered cylinder, 403, convex ring, 404, threaded hole one, 405, tooth structure, 501, tapered through hole, 502, groove, 503, threaded hole two, 601, fixing ring, 602, ruler sleeve, 603, ruler, 604, screw. DETAILED DESCRIPTION

[0020] The utility model provides an online replacement device for a gas nozzle 7 for removing cutting nodules of a cast billet by using a pressure airflow, which is used in conjunction with a casting and a continuous casting machine, and comprises: a metal hose 1, an air pipe 2, a fixing bolt 3, a movable sleeve 4, a fixing sleeve 5, a positioning ruler 6 and a gas nozzle 7. The metal hose 1 is detachably connected to the air pipe 2, the fixing sleeve 5 is fixedly welded to the continuous casting machine, the movable sleeve 4 is inserted into the fixing sleeve 5 and fixed by snap connection, the positioning ruler 6 is fixedly connected to the bottom of the fixing sleeve 5, and the length of the gas nozzle 7 that needs to be fixed is obtained after measurement. After the positioning ruler 6 is adjusted to the corresponding length, it is fixed by a screw 604 so as to limit the position of the gas nozzle 7.

[0021] In some embodiments, a lifting groove 401 with an I-shaped structure is provided on the upper portion of the movable sleeve 4. The upper edge of the lifting groove 401 is thickened and can be pried off by a lever during disassembly to facilitate the removal of the movable sleeve 4. A conical cylinder 402 is provided below the lifting groove 401. A convex ring 403 is provided on the upper portion of the conical cylinder 402. A threaded hole 404 is provided in the middle portion of the conical cylinder 402. A toothed structure 405 is provided at the lower portion of the conical cylinder 402. The toothed structure 405 is squeezed and contracted, and the contraction surface is circular. The diameter of the resulting circle is slightly smaller than the diameter of the gas pipe 2.

[0022] In some embodiments, the fixed sleeve 5 is a cylinder with a conical through hole 501 structure on the inner side. A groove 502 corresponding to the size of the convex ring 403 is provided on the upper part of the conical through hole 501. The aperture of the upper end of the conical through hole 501 corresponds to the aperture of the upper end of the conical tube 402. The aperture of the lower end of the conical through hole 501 is smaller than the aperture of the columnar structure at the lower part of the conical tube 402. When the movable sleeve 4 is inserted into the fixed sleeve 5, the convex ring 403 on the conical tube 402 is clamped with the fixed sleeve 5, and the toothed structure 405 at the lower part of the conical tube 402 is squeezed and contracted by the conical through hole 501, thereby clamping the air supply pipe 2. A threaded hole 2 503 is provided in the middle part of the fixed sleeve 5. The aperture of the threaded hole 2 503 is the same as that of the threaded hole 1 404. When the movable sleeve 4 is inserted into the fixed sleeve 5, the position of the threaded hole 2 503 corresponds to that of the threaded hole 1 404, forming a continuous threaded hole.

[0023] In some embodiments, the positioning ruler 6 includes a fixing ring 601, a ruler sleeve 602, a ruler 603 and a screw 604. The fixing ring 601 is arranged on the upper part of the positioning ruler 6, and the fixing ring 601 is fixedly connected to the bottom of the fixing sleeve 5. The positioning ruler 6 takes the lower edge of the fixing ring 601 as the measurement starting point. The ruler sleeve 602 is arranged below the fixing ring 601. The ruler 603 is arranged in the ruler sleeve 602 and is fixed by screws 604. There are corresponding scales on the ruler 603 to facilitate the ruler 603 to reach the measuring length. The air nozzle 7 is limited below the ruler 603.

[0024] In some embodiments, the size of the fixing bolt 3 corresponds to the threaded hole 1 404 and the threaded hole 2 503 , and the fixing bolt 3 clamps the gas pipe 2 through the threaded hole 1 404 and the threaded hole 2 503 , so that the gas pipe 2 is installed firmly and reliably.

[0025] Example 1

[0026] An embodiment of the utility model is provided. When the gas nozzle 7 fails, the gas supply valve is closed, and the maintenance worker goes to the flame cutting machine platform, disassembles the metal hose 1 connected to the gas nozzle 7 pipeline, removes the fixing bolt 3, inserts the lever into the gap of the lifting groove 401, uses the lever to pry the lifting groove 401, lifts the movable sleeve 4 upward and takes it out, and after the gas nozzle 7 is released, the gas nozzle 7 is removed and replaced. When the position of the gas nozzle 7 needs to be adjusted, the reserved distance of the gas nozzle 7 needs to be measured, and the position of the scale 603 in the positioning ruler 6 is adjusted. After the required length is obtained, it is fixed by the screw 604.

[0027] When installing the gas nozzle 7, first insert the gas nozzle 7 into the fixed sleeve 5, install the movable sleeve 4 on the gas nozzle 7, when the clamping part of the gas nozzle 7 is against the scale 603, install the movable sleeve 4 in the fixed sleeve 5 and clamp it, then pass the fixing bolt 3 through the threaded hole 2 503 and the threaded hole 1 404 to fix the gas nozzle 7 for the second time, finally connect the metal hose 1 to the gas pipe 2, complete the replacement of the gas nozzle 7, and open the gas valve for cutting.

[0028] The utility model fixes the gas pipe 2 twice by means of the movable sleeve 4 and the fixing bolt 3, thereby reducing the online replacement time and increasing the safety and stability of the gas pipe 2 installation, reducing the intensity of manual operation under high temperature and improving the production efficiency.

[0029] In this embodiment, the length against the scale 603 can be set in advance, thereby reducing the time for replacing the air nozzle.

[0030] Example 2

[0031] An embodiment of the utility model is provided, in which the structure of the upper part of the movable cover 4 can be an annular structure and a downward clamping part is provided on the periphery of the annular structure, so that the operator can remove the movable cover 4 conveniently.

[0032] The above description of the disclosed embodiments enables professionals in the field to implement or use the present invention. Various modifications to these embodiments will be obvious to professionals in the field. The present invention will not be limited to the embodiments shown in this article, but will conform to the widest scope consistent with the principles and novel features disclosed in this article.

Claims

1. An online replacement device for a gas nozzle for removing the cutting nodules of a cast billet by a pressure airflow, used in conjunction with a casting billet and a continuous casting machine, comprising: A metal hose, an air pipe, fixing bolts, a movable sleeve, a fixed sleeve, a positioning ruler and an air nozzle, wherein the fixed sleeve is fixedly welded on the continuous casting machine, the movable sleeve is inserted into the fixed sleeve and fixed by snap connection, the positioning ruler is fixedly connected to the bottom of the fixed sleeve, and the length of the positioning ruler is fixed by screws.

2. The device for online replacement of a gas nozzle for removing nodules by pressure airflow according to claim 1 is characterized in that: The upper part of the movable sleeve is provided with a lifting groove of an "I" structure, a conical cylinder is provided below the lifting groove, a convex ring is provided on the upper part of the conical cylinder, a threaded hole is provided in the middle part of the conical cylinder, and the lower part of the conical cylinder is a toothed structure.

3. The device for online replacement of a gas nozzle for removing nodules by pressure airflow according to claim 1 is characterized in that: The fixing sleeve is a cylinder with a conical through hole structure on its inner side. The aperture of the upper end of the conical through hole corresponds to the aperture of the upper end of the conical tube. The aperture of the lower end of the conical through hole is smaller than the aperture of the toothed structure at the lower part of the conical tube. The upper part of the conical through hole is provided with a groove corresponding to the size of the convex ring. The middle part of the fixing sleeve is provided with a threaded hole 2, and the aperture and position of the threaded hole 2 correspond to those of the threaded hole 1.

4. The device for online replacement of a gas nozzle for removing nodules by pressure airflow according to claim 1 is characterized in that: The positioning ruler includes a fixing ring, a ruler sleeve, a ruler and screws. The fixing ring is arranged on the upper part of the positioning ruler and is fixedly connected to the bottom of the fixing sleeve. The ruler sleeve is arranged below the fixing ring. The ruler is arranged in the ruler sleeve and is fixed by screws. The bottom of the ruler limits the air nozzle.

5. The device for online replacement of a gas nozzle for removing nodules by pressure airflow according to claim 1 is characterized in that: The size of the fixing bolt corresponds to the threaded hole one and the threaded hole two.

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