Molten steel level height detection tool

Abstract

The utility model discloses a molten steel level height detection tool which comprises an installation lantern ring which is connected to the outer side of an oxygen lance outer pipe in a sleeved mode, a threaded hole is formed in the installation lantern ring, a first locking jackscrew is connected to the interior of the threaded hole in a threaded mode, and the end of the first locking jackscrew abuts against the oxygen lance outer pipe and is used for fixing the installation lantern ring. A measuring sleeve is further arranged on the outer side of the mounting lantern ring and is of a tubular structure with the upper portion closed and the lower end open. According to the utility model, the accurate molten steel level height is obtained by measuring the length of the upper part of the molten steel level trace on the oxygen lance and comparing the length with the relative height of the oxygen lance outer tube, the data value accuracy of the encoder carried by the oxygen lance outer tube is verified, and the actual height of the oxygen lance outer tube is adjusted according to the error amount. Therefore, the problems that due to the fact that the lance position of the oxygen lance is not accurate, splashing is serious in the blowing process, and resources are wasted are solved, the problems that due to the fact that the installation position is not accurate, the oxygen lance is abnormally bonded with steel and cold iron, and the number of offline lines is large are solved, the working safety of the oxygen lance is improved, and the equipment maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level measurement for smelting, in particular to a tool for detecting the height of a steel liquid level. Background Art

[0002] The thickness of the converter bottom and the lining increases with the number of smelting furnaces, and the thickness of the refractory material is in dynamic change, resulting in different heights of the molten steel level. The position of the oxygen gun also needs to be adjusted accordingly according to the height of the molten steel level, and the height of the molten steel level needs to be measured periodically.

[0003] The height of the oxygen lance is usually measured by installing an encoder on the lance. Due to the dynamic changes in the height of the molten steel level, the measurement value obtained by the encoder will have errors. Due to the problem of inaccurate measurement and the lack of methods and tools to accurately measure the molten steel level, the oxygen lance position is inaccurate, and splashing is serious during the blowing process, resulting in waste of resources; it also causes the oxygen lance to stick to steel and cold iron abnormally, resulting in abnormal offline, which leads to damage to the oxygen lance and increases equipment maintenance costs.

[0004] The utility model provides a tool for detecting the height of liquid steel surface to solve the above technical problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a tool for detecting the height of molten steel level in view of the deficiencies of the above-mentioned prior art. The mounting collar is coaxially fixed on the outer side of the oxygen lance outer tube through a positioning detection component, and then a measuring oxygen blowing tube is installed. The outer tube of the oxygen lance is lowered into the furnace and then lifted up. The fixed-length oxygen blowing tube is immersed in the molten steel and then lifted up to obtain obvious traces of the molten steel level. By measuring the length of the upper part of the trace of the molten steel level on the oxygen blowing tube and comparing it with the relative height of the outer tube of the oxygen lance, the accurate height of the molten steel level can be obtained, and the accuracy of the data value of the encoder carried by the outer tube of the oxygen lance is verified, thereby adjusting the height position of the outer tube of the oxygen lance.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A steel liquid level detection tool comprises a mounting collar, which is sleeved on the outer side of an oxygen lance outer tube, a threaded hole is provided on the mounting collar, and a first locking screw is threadedly connected inside the threaded hole, and the end of the first locking screw abuts against the outer tube of the oxygen lance for fixing the mounting collar, and a measuring sleeve is also provided on the outer side of the mounting collar, the measuring sleeve is a tubular structure with a closed upper part and an open lower end, and a fixed-length oxygen blowing pipe is inserted into the open tube of the measuring sleeve, and the fixed-length oxygen blowing pipe and the measuring sleeve are assembled by a second locking screw, the fixed-length oxygen blowing pipe is inserted into the steel liquid to obtain the steel liquid level trace, and the steel liquid level detection data is verified in cooperation with the encoder on the oxygen lance outer tube, and the fixed-length oxygen blowing pipe is a disposable product;

[0008] A positioning detection component is provided on the top of the installation collar, which is used to calibrate the coaxial installation structure of the installation collar and the outer tube of the oxygen lance.

[0009] Preferably, the positioning detection component comprises:

[0010] A ring rail fixed to the top of the mounting collar;

[0011] A moving seat is movably connected to the top of the circular rail, and the moving seat moves along the track of the circular rail;

[0012] A measuring rod passes through the movable seat and is slidably connected to the through hole. A scale is arranged on the surface of the measuring rod. A baffle is fixedly connected to the outer side of one end of the measuring rod close to the outer tube of the oxygen gun. A groove is arranged on the outer side of the through hole of the movable seat. A spring sleeved with the measuring rod is arranged in the groove, and the spring is located between the baffle and the movable seat.

[0013] Preferably, a ball is provided at the axis of the baffle, and the ball is in active contact with the outer tube of the oxygen lance.

[0014] Preferably, a break is provided on the annular rail, and the length of the break is greater than the length of the moving seat, so as to be used for installing or removing the moving seat.

[0015] Preferably, the measuring sleeve is welded to the mounting collar, and a strip-shaped observation hole is provided through one side of the measuring sleeve.

[0016] Preferably, the number of the first locking screws is set to three, and the three first locking screws are correspondingly installed in the east, west and south directions of the mounting collar, and the measuring sleeve is located in the north direction of the mounting collar.

[0017] Preferably, a reinforcement pile is provided outside the threaded hole, and the reinforcement pile is integrally arranged with the mounting collar or the measuring sleeve.

[0018] Preferably, the mounting collar is made of a seamless tube, and the inner diameter of the mounting collar matches the outer diameter of the oxygen lance outer tube.

[0019] The utility model has the following beneficial effects:

[0020] The mounting collar is coaxially fixed to the outside of the oxygen lance outer tube through the positioning detection component, and then the measuring oxygen blowing tube is installed. The oxygen lance outer tube is lowered into the furnace and then lifted up. The fixed-length oxygen blowing tube is immersed in the molten steel and then lifted up to obtain obvious molten steel level marks. By measuring the length of the upper part of the molten steel level mark on the oxygen blowing tube and comparing it with the relative height of the oxygen lance outer tube, the accurate molten steel level height can be obtained, and the accuracy of the data value of the encoder carried by the oxygen lance outer tube is verified. By adjusting the actual height of the oxygen lance outer tube according to the error amount, the problem of inaccurate oxygen lance position, resulting in severe splashing during the blowing process and waste of resources is solved, and the problem of abnormal oxygen lance sticking to steel and cold iron and abnormally high offline due to incorrect installation position is avoided, thereby improving the safety of oxygen lance operation and reducing equipment maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of the overall structure of the detection tool provided by the utility model;

[0022] Figure 2 An exploded view of the overall structure of the detection tool provided by the utility model from the first perspective;

[0023] Figure 3 An exploded view of the overall structure of the detection tool provided by the utility model from a second perspective;

[0024] Figure 4 An exploded view of the local structure of the positioning detection component provided by the utility model;

[0025] Figure 5 This is a usage status diagram of the detection tool provided by the utility model.

[0026] Among them are:

[0027] Oxygen lance outer tube-01;

[0028] Installation collar-1; threaded hole-2; first locking screw-3; measuring sleeve-4; fixed-length oxygen blowing pipe-5; second locking screw-6; positioning detection component-7; fracture-8; strip observation hole-9; reinforcement pile-10;

[0029] Annular rail 701; moving seat 702; measuring rod 703; baffle 704; groove 705; spring 706; ball 707. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0031] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not indicate the importance of the components, and therefore cannot be understood as a limitation on the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention.

[0032] like Figure 1-5 As shown, a tool for detecting the height of a molten steel level comprises a mounting collar 1, which is sleeved on the outside of an oxygen lance outer tube 01, a threaded hole 2 is provided on the mounting collar 1, and a first locking screw 3 is threadedly connected inside the threaded hole 2, and the end of the first locking screw 3 abuts against the oxygen lance outer tube 01 for fixing the mounting collar 1, and a measuring sleeve 4 is further provided on the outside of the mounting collar 1, the measuring sleeve 4 is a tubular structure with a closed upper portion and an open lower end, and a fixed-length oxygen blowing pipe 5 is inserted into the open tube of the measuring sleeve 4, and the fixed-length oxygen blowing pipe 5 and the measuring sleeve 4 are assembled and combined by a second locking screw 6, and the fixed-length oxygen blowing pipe 5 is inserted into the molten steel to obtain a trace of the molten steel level, and the encoder on the oxygen lance outer tube 01 is used to verify the detection data of the molten steel level;

[0033] A positioning detection component 7 is provided on the top of the mounting collar 1, which is used to calibrate the coaxial mounting structure of the mounting collar 1 and the oxygen lance outer tube 01;

[0034] As a preferred embodiment of the positioning detection component 7 in the present application, it includes:

[0035] The annular rail 701 is fixed on the top of the mounting collar 1;

[0036] The movable seat 702 is movably connected to the top of the circular rail 701, and the movable seat 702 moves along the track of the circular rail 701;

[0037] A measuring rod 703 passes through the movable seat 702 and is slidably connected to the through hole. A scale is provided on the surface of the measuring rod 703. A baffle 704 is fixedly connected to the outer side of one end of the measuring rod 703 close to the oxygen gun outer tube 01. A groove 705 is provided on the outer side of the through hole of the movable seat 702. A spring 706 sleeved with the measuring rod 703 is provided in the groove 705, and the spring 706 is located between the baffle 704 and the movable seat 702.

[0038] The movable seat 702 is slid in a full circle on the track of the annular rail 701. During this process, under the action of the spring 706 and the interference between the measuring rod 703 and the oxygen lance outer tube 01, the scale value on the surface of the measuring rod 703 is observed, so as to obtain the distance between the installation ring 1 and the outer wall of the oxygen lance outer tube 01 at various locations after installation, and ensure the coaxial distribution of the installation ring 1 and the oxygen lance outer tube 01. At this time, the accuracy of the fixed-length oxygen blowing tube 5 in obtaining the steel liquid surface trace can be guaranteed.

[0039] Specifically, a ball 707 is provided at the axis of the baffle 704, and the ball 707 is in active contact with the oxygen gun outer tube 01, thereby reducing the loss of the measuring rod 703 and improving the measurement accuracy.

[0040] Specifically, a break 8 is provided on the annular rail 701 , and the length of the break 8 is greater than the length of the moving seat 702 , and is used for installing or removing the moving seat 702 .

[0041] Specifically, the measuring sleeve 4 is welded to the mounting collar 1 , and a strip-shaped observation hole 9 is provided through one side of the measuring sleeve 4 , through which it is observed whether the measuring oxygen blowing tube 5 is plugged into place inside the measuring sleeve 4 .

[0042] Specifically, the number of the first locking screws 3 is set to three, and the three first locking screws 3 are correspondingly installed in the east, west and south directions of the mounting collar 1 , and the measuring sleeve 4 is located in the north direction of the mounting collar 1 .

[0043] Specifically, a reinforcement pile 10 is provided outside the threaded hole 2, and the reinforcement pile 10 is integrally arranged with the mounting collar 1 or the measuring sleeve 4, so as to improve the strength of the device and extend the service life of the device.

[0044] Specifically, the installation collar 1 is made of a seamless pipe, and the inner diameter of the installation collar 1 matches the outer diameter of the oxygen lance outer tube 01 . The installation collar 1 is selected according to the specifications of the oxygen lance outer tube 01 .

[0045] The following specific embodiments are given in this utility:

[0046] According to an existing specification of oxygen lance outer tube 01, a 50mm long and 300mm diameter seamless pipe is selected as the installation collar 1, three holes with a diameter of 20mm are opened in the east, west and south directions of the seamless pipe, M16 nuts are welded on the holes as reinforcement piles 10, and a M16*50 screw, i.e., the first locking screw 3, is screwed into the threaded hole as a screw, and a measuring sleeve 4 with a length of 150mm and a diameter of 25mm is welded on the north side of the seamless pipe, and a second locking screw 6 is installed on the side;

[0047] When in use, put the seamless pipe on the oxygen lance outer tube 01, tighten the first locking top screw 3, and use the positioning detection component 7 to obtain the distance between the installation ring 1 and the outer wall of the oxygen lance outer tube 01 after installation, and coaxially fix the installation ring 1 on the outside of the oxygen lance outer tube 01 to ensure the accuracy of the fixed-length oxygen blowing pipe 5 in obtaining the steel liquid surface mark. Insert the fixed-length oxygen blowing pipe with a diameter of 20mm and a length of 2.5 meters into the measuring sleeve 4 and tighten the second locking top screw 6; manually operate the oxygen lance outer tube 01 downward into the furnace and then lift the oxygen lance outer tube 01. There are obvious steel liquid surface marks on the fixed-length oxygen blowing pipe 5. By measuring the length of the upper part of the steel liquid surface mark on the oxygen blowing pipe 5 and comparing it with the relative height of the oxygen lance outer tube 01, the accurate steel liquid level height can be obtained. The value is compared with the data value obtained by the encoder carried by the oxygen lance outer tube 01 to verify its accuracy.

[0048] The above is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A tool for detecting the height of liquid steel, characterized in that: The invention comprises a mounting collar (1) which is sleeved on the outside of an oxygen lance outer tube (01), wherein a threaded hole (2) is formed on the mounting collar (1), and a first locking screw (3) is threadedly connected inside the threaded hole (2), and an end of the first locking screw (3) abuts against the oxygen lance outer tube (01) for fixing the mounting collar (1), and a measuring sleeve (4) is further provided on the outside of the mounting collar (1), wherein the measuring sleeve (4) is a tubular structure with a closed upper portion and an open lower end, and a fixed-length oxygen blowing pipe (5) is inserted into the open tube of the measuring sleeve (4), and the fixed-length oxygen blowing pipe (5) and the measuring sleeve (4) are assembled and assembled via a second locking screw (6), and the fixed-length oxygen blowing pipe (5) is inserted into molten steel to obtain a trace of the molten steel surface, and the molten steel surface height detection data is verified in cooperation with an encoder on the oxygen lance outer tube (01); A positioning detection component (7) is provided on the top of the mounting collar (1) for calibrating the coaxial mounting structure of the mounting collar (1) and the oxygen lance outer tube (01).

2. A tool for detecting the height of liquid steel according to claim 1, characterized in that: The positioning detection component (7) comprises: An annular rail (701) is fixed on the top of the mounting collar (1); A movable seat (702) is movably connected to the top of the circular rail (701), and the movable seat (702) moves along the track of the circular rail (701); A measuring rod (703) passes through the movable seat (702) and is slidably connected to the through hole. A scale is provided on the surface of the measuring rod (703). A baffle (704) is fixedly connected to the outer side of one end of the measuring rod (703) close to the oxygen gun outer tube (01). A groove (705) is provided on the outer side of the through hole of the movable seat (702). A spring (706) sleeved with the measuring rod (703) is provided in the groove (705), and the spring (706) is located between the baffle (704) and the movable seat (702).

3. A steel liquid level detection tool according to claim 2, characterized in that: A ball (707) is provided at the axis of the baffle (704), and the ball (707) is in active contact with the outer tube (01) of the oxygen lance.

4. A tool for detecting the height of liquid steel according to claim 2, characterized in that: The annular rail (701) is provided with a break (8), and the length of the break (8) is greater than the length of the movable seat (702), and is used for installing or removing the movable seat (702).

5. A tool for detecting the height of liquid steel according to claim 1, characterized in that: The measuring sleeve (4) is welded to the mounting collar (1), and a strip-shaped observation hole (9) is provided through one side of the measuring sleeve (4).

6. A tool for detecting the height of liquid steel according to claim 1, characterized in that: The number of the first locking top screws (3) is set to three, and the three first locking top screws (3) are correspondingly installed in the east, west and south directions of the installation collar (1), and the measuring sleeve (4) is located in the north direction of the installation collar (1).

7. A tool for detecting the height of liquid steel according to claim 1, characterized in that: A reinforcement pile (10) is provided outside the threaded hole (2), and the reinforcement pile (10) is integrally arranged with the mounting collar (1) or the measuring sleeve (4).

8. A tool for detecting the height of liquid steel according to claim 1, characterized in that: The mounting collar (1) is made of a seamless pipe, and the inner diameter of the mounting collar (1) matches the outer diameter of the oxygen lance outer pipe (01).

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