An air bag type crystallizer corner seam cleaning device and its use method

Abstract

The present invention discloses an airbag-type crystallizer corner seam cleaning device and a method for using the same, and relates to the technical field of slab continuous casting machinery. The airbag-type crystallizer corner seam cleaning device comprises a T-shaped handle, a back plate, a scraper, a rubber airbag, an inflation and exhaust valve, an air pipe, and a flat airbag; the T-shaped handle is made of a seamless steel pipe with an appropriate wall thickness to ensure sufficient strength and rigidity; the back plate is made of a spring steel plate with a thickness of 1mm and a width of 100mm. The thin spring plate is flexible and has an appropriate hardness, and is 1200mm long, which is greater than the 300mm length of the crystallizer copper plate. The airbag-type crystallizer corner seam cleaning device and a method for using the same have a simple structure and a small thickness, and can penetrate into a narrow space. The scraper is opened by the push of the airbag, and the scraper fits tightly against the side of the narrow copper plate, resulting in a good cleaning effect. The thin film airbag can automatically adapt to the width of the corner seam after opening, without the need for adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field of slab continuous casting machinery, in particular to an air bag type crystallizer corner seam cleaning device and a use method thereof. Background Art

[0002] As the core component of the continuous casting machine, the crystallizer of the continuous casting machine has a very direct impact on the smooth production of the casting machine. The slab crystallizer is generally composed of four copper plates clamped together to form a cooling cavity. The four copper plates are required to fit tightly after clamping, and the fitting area is called the corner seam. Once the corner seam is large and the static pressure of the molten steel is greater than the tension, the molten steel will drill into the corner seam, causing steel to hang and cause steel leakage accidents. The formation of corner seams is mostly caused by debris such as protective slag and oxide scale splashing into the fitting area and adhering to the side of the narrow copper plate under the action of the copper plate clamping force, making it difficult to remove.

[0003] Currently, steel mills typically use steel rulers or thin spring steel sheets inserted into the corners of molds to remove stuck debris. Some use specialized tools, but these tools only allow for a maximum gap of approximately 10mm after the mold copper plates are opened. The mold copper plates are typically around 900mm long, creating a narrow, long, and small space that limits operation. This makes it difficult to completely clean the corners, especially at the lower side of the copper plates. Furthermore, these tools can easily damage the surface coating of the mold copper plates, shortening the mold's service life.

[0004] How to clean the corner seams of slab crystallizer conveniently and efficiently has become a research topic in slab continuous casting production.

[0005] A novel search was conducted on existing related slab mold corner seam cleaning tools, and the results are as follows:

[0006] (1) "A slab continuous casting crystallizer corner seam [utility model] (CN203972349U). Disclosed is a slab crystallizer corner seam cleaning tool, comprising a hand-held rod, a connecting rod and a scraper. The hand-held rod is made of a rigid material. The middle of the hand-held rod and the top of the connecting rod are fixedly connected by welding. The connecting rod is made of a rigid material. The end of the connecting rod and the non-blade end of the scraper are fixedly connected by welding. The scraper is a square structure with a blade at the outer end. This patent uses a scraper to scrape and clean the corner seam after it is pressed against a copper plate. Pressing and scraping are both done by hand. The copper plate is generally 900 mm long and the lower part is far away. Manual hand-holding cannot ensure that it is pressed against the copper plate and scraped.

[0007] (2) “A crystallizer corner seam cleaning booster shovel [Utility Model] (CN209061656U). Disclosed is a crystallizer corner seam cleaning booster shovel, belonging to the technical field of steelmaking equipment, characterized in that: the right end of the guide rod is inserted into the guide blind hole, the right end of the guide rod is provided with a long strip guide groove, the long strip guide groove of the guide rod is provided with a guide pin shaft, and the two ends of the guide pin shaft are respectively connected to the groove wall; the lower end of the long strip outer shell is provided with a hinge plate, the lower end of the guide plate passes through the long strip guide groove of the long strip shell and is hinged to the hinge plate; the guide The right end of the rod is connected to the scraper. The right end of the guide rod is provided with a shoulder, which is connected to the left end of the elongated outer shell via a compression spring. The guide pin is embedded in the rectangular guide hole of the guide plate. The upper end of the guide plate is fixedly connected to the lower end of the screw. The lower end of the handle is provided with a threaded hole, and the upper end of the screw is threadedly connected to the threaded hole of the handle. This patent uses a scraper to close the copper plate and then scrape and clean the corners. Scraping is performed by pneumatic means, while close contact is achieved by manual hand-holding. The copper plate is generally 900mm long and the lower part is far away, so manual hand-holding cannot ensure close contact and scraping.

[0008] (3) An efficient tool for cleaning corner seams of ESP crystallizers (CN 208131513 U). Disclosed is an efficient tool for cleaning corner seams of ESP crystallizers, belonging to the technical field of steelmaking equipment, characterized in that: the right end of the guide rod is inserted into the guide blind hole, the right end of the guide rod is provided with an elongated guide groove, the elongated guide groove of the guide rod is provided with a guide pin, and the two ends of the guide pin are respectively connected to the groove wall; the lower end of the elongated outer shell is provided with a hinge plate, and the lower end of the guide plate passes through the elongated guide groove of the elongated shell and is hinged to the hinge plate; the right end of the guide rod is connected to the scraper, and the right end of the guide rod is provided with a shaft shoulder, which is connected to the left end of the elongated outer shell by a compression spring; the guide pin is embedded in the rectangular guide hole of the guide plate; the upper end of the guide plate is fixedly connected to the lower end of the screw rod, the lower end of the handle is provided with a threaded hole, and the upper end of the screw rod is threadedly connected to the threaded hole of the handle. This patent uses a scraper to scrape and clean the corners after it is pressed against the copper plate. The scraping is done by pneumatic means, and the pressing is done by manual hand-holding. The length of the copper plate is generally 900mm, and the lower part is far away. Manual hand-holding cannot ensure that the scraping is done after pressing against it.

[0009] (4) A scraper for cleaning dirt from the corners of a crystallizer [Utility Model CN ​​207655873 U]. Disclosed is a scraper for cleaning dirt from the corners of a crystallizer, comprising a handle, a connecting rod, a fixed sleeve, and a scraper blade. The handle is fixedly connected to one end of the connecting rod, the other end of the connecting rod is fixedly connected to the fixed sleeve, and the scraper blade is fixed to the fixed sleeve; the connecting rod is a multi-section composite structure. This patent uses a scraper to scrape and clean the corners after it is pressed against a copper plate. Both pressing and scraping are done manually. The copper plate is generally 900 mm long and the lower part is far away, so manual holding cannot ensure that it is pressed against the copper plate and scraped.

[0010] (5) An airbag-type conveyor belt cleaning device [Utility Model, CN213170054U], which is used to clean conveyor belts. By inflating or deflating the airbag and adjusting the direction and pressure between the scraper and the conveyor belt, oil and fine impurities on the belt surface are separated from the belt by the blade. This patent is applied to conveyor belt cleaning. The airbag is long and has two strips, which are clamped between the connecting seat and the scraper clamp on both sides of the rotating shaft. The structure is large and cannot be used to extend into the narrow space of 10mm such as the corner gap of the crystallizer.

[0011] (6) CN212018623U provides a device for cleaning the gap of a crystallizer of a slab continuous casting machine, which is characterized by comprising: a fixed portion for connecting to the end of the crystallizer of the continuous casting machine; a cleaning mechanism provided with a first cleaning plate and a second cleaning plate arranged parallel to each other for cleaning the gap between the two copper plates of the crystallizer, wherein the distance between the first cleaning plate and the second cleaning plate is adjustable; and a telescopic mechanism, wherein the bottom end is connected to the fixed portion, and the pushing end is connected to the side of the cleaning mechanism, wherein the cleaning mechanism moves in the gap of the copper plates by means of the telescopic mechanism. The function of this patent is to clean the gap in the crystallizer of a slab continuous casting machine, which is the distance between the wide copper plates, that is, in the thickness direction of the slab [described in the article: "The main executive component for processing impurities in the gap on the copper plate is the cleaning mechanism 2. For the processing of gaps of different widths (spacing), the cleaning mechanism 2 can adjust the spacing at will, which can meet the needs of cleaning gaps of different spacings. After the cleaning mechanism 2 is extended into the gap, the device is fixed by the fixing part 1, and finally the telescopic mechanism 3 is started. The telescopic action of the telescopic mechanism 3 drives the cleaning mechanism 2 to slide back and forth in the gap and can clean up the impurities in the gap. After the impurities in a certain area of ​​the gap are cleaned up, the fixing part 1 can be removed from the crystallizer and re-fixed at a different position on the crystallizer. With the same cleaning method, the impurities in different areas of the gap can continue to be cleaned." The purpose of this utility model is to provide a crystallizer gap cleaning device for a slab continuous casting machine, which aims to solve the technical problems of troublesome cleaning and incomplete cleaning when the gap between the copper plates is large. Problems: 1. The cleaning surface is the wide copper plate surface, not the slab mold corner seam (the side of the narrow copper plate). 2. Gears are used to adjust the spacing between the cleaning plates. Due to the presence of the gear transmission mechanism, guide posts, springs, and cleaning plates, the distance between the two cleaning plates is large, making it unsuitable for cleaning within the narrow 10mm corner seams used for online cleaning. This shows that the patent addresses the cleaning problem of larger gaps, not narrow gaps like corner seams, and the cleaning targets are different.

[0012] A search revealed that existing mold corner cleaning tools lack a force-supporting point when scraping the lower portion of the mold. The scraper blade relies on manual grip to maintain contact with the narrow copper plate, preventing it from closely adhering to the narrow copper plate for scraping and cleaning. Consequently, cleaning the lower corners effectively and efficiently is not guaranteed. Existing airbag cleaning tools have no application in mold corner cleaning, and their large size and structure make them unsuitable for use in narrow spaces and gaps.

[0013] The existing slab crystallizer corner seam cleaning tools cannot adapt to this working condition requirement, so a slab crystallizer corner seam cleaning device is needed to meet the above requirements. Summary of the Invention

[0014] (1) Technical problems solved

[0015] In view of the deficiencies in the prior art, the present invention provides an airbag-type crystallizer corner seam cleaning device and a method of using the same, which solve the problems existing in the prior art.

[0016] (2) Technical solution

[0017] To achieve the above objectives, the present invention is implemented through the following technical solutions: an airbag type crystallizer corner seam cleaning device, comprising a T-shaped handle, a back plate, a scraper, a rubber airbag, an inflation and exhaust valve, an air pipe and a flat airbag;

[0018] The T-shaped handle is made of seamless steel pipe with appropriate wall thickness to ensure sufficient strength and rigidity;

[0019] The back plate is made of spring steel with a thickness of 1mm and a width of 100mm. The thin spring plate is flexible and has appropriate hardness. Its length is 1200mm, which is 300mm longer than the length of the crystallizer copper plate, allowing it to be inserted into the corner gap and reach the bottom of the copper plate. To prevent scratching the copper plate, the edges and right angles at the bottom of the back plate are polished to smooth rounded corners.

[0020] The T-shaped handle and the back plate are welded to form a whole, the upper part of the handle is used for operation and grip, and the lower part is welded to the spring plate to form an integrated structure;

[0021] A scraper made of spring steel, 1mm thick, 60mm wide, and 500-600mm long, is mounted beneath the backplate. The scraper's upper end is connected to the backplate with rivets, and due to its elasticity, its lower end can flare outward along the rivet as its center point. The scraper's width is slightly greater than the thickness of the narrow copper plate, and the end is bent at a 90-degree angle, approximately 2mm high, forming a cutting edge wide enough to cover the side of the narrow copper plate.

[0022] A flat airbag is installed between the scraper and backboard, with one side bonded to the backboard. Made of TPU rubber and reinforced fiber, the airbag measures 120mm long, 50mm wide, and 2mm thick. Operating pressure is 0.1 MPa. It is connected to the inflation and exhaust valves and the rubber airbag via an air pipe. When inflated, the maximum thickness is approximately 20mm. The air pipe passes through the vertical tube of the T-handle.

[0023] When the inflation and exhaust valve is closed, the rubber airbag and the flat airbag are connected by a pipe, and the flat airbag can be inflated by squeezing the rubber airbag; when the inflation and exhaust valve is opened, the flat airbag is connected to the atmosphere by inflation and exhaust.

[0024] In the standby state, the back plate and the scraper clamp the flat airbag between them due to the elastic force of the spring steel plate, and the air in the flat airbag is discharged through the inflation and exhaust valve. The maximum height of the three after being tightened is about 6mm, which is 10mm less than the width of the corner seam after the crystallizer copper plate is opened. The corner seam cleaning device can be inserted into the corner seam. The scraper edge is ground to a 70-degree tip angle. After the airbag is inflated, the scraper edge and the cut surface of the narrow copper plate still maintain edge line contact.

[0025] A method for using an airbag-type crystallizer corner seam cleaning device, comprising the airbag-type crystallizer corner seam cleaning device described above, is specifically performed as follows:

[0026] When in use, close the inflation and exhaust valve, squeeze the airbag manually, and the airbag will inflate, providing a maximum thrust of about 60kg, which can open the scraper. The thickness from the scraper edge to the back plate is found to be more than 12mm, which is greater than the 10mm width of the corner seam.

[0027] To use, insert the closed corner cleaning device into the open corner gap and under the copper plate, with the scraper facing the side of the narrow copper plate where debris is stuck. The back plate rests against the wide copper plate as a guide. Once in place, close the inflation and exhaust valves to inflate the device. Manually squeeze the rubber airbag through the air tube to inflate the flat airbag until the flat airbag inflates. One side of the bottom plate, bonded to the back plate, is in contact with the wide copper plate, while the other side pushes the scraper against the side of the narrow copper plate. Pull the handle up and down slightly, determining contact by the resistance between the scraper and the narrow plate. Once contact is established, stop inflating the airbag, maintaining pressure. Pull the handle up and down, moving the scraper up and down along the height of the narrow copper plate, completely removing debris from the entire side.

[0028] After the corners are scraped and cleaned, open the inflation and exhaust valve, the flat airbag is deflated and shrinks, the back plate and the scraper are tightened, the thickness becomes smaller, and it is pulled out from the corners to complete the cleaning of the corners.

[0029] (3) Beneficial effects

[0030] The present invention provides an air bag type crystallizer corner seam cleaning device and its use method.

[0031] Beneficial effects:

[0032] The airbag-type crystallizer corner seam cleaning device and its use method have a simple structure and a small thickness, and can penetrate into a narrow space. The scraper is opened by the push of the airbag, and the scraper fits tightly with the side of the narrow copper plate, with a good cleaning effect. The thin film airbag can automatically adapt to the width of the corner seam after opening without the need for adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the present invention;

[0034] Figure 2 is a schematic diagram of a flat airbag of the present invention;

[0035] Figure 3 Schematic diagram of the scraper of the present invention;

[0036] Figure 4 This is a schematic diagram of the present invention when in use. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] See also Figure 1-4 , the present invention provides a technical solution: an airbag type crystallizer corner seam cleaning device, comprising a T-shaped handle, a back plate, a scraper, a rubber airbag, an inflation and exhaust valve, an air pipe and a flat airbag;

[0039] The T-shaped handle is made of seamless steel pipe with appropriate wall thickness to ensure sufficient strength and rigidity;

[0040] The back plate is made of spring steel with a thickness of 1mm and a width of 100mm. The thin spring plate is flexible and has appropriate hardness. Its length is 1200mm, which is 300mm longer than the length of the crystallizer copper plate, allowing it to be inserted into the corner gap and reach the bottom of the copper plate. To prevent scratching the copper plate, the edges and right angles at the bottom of the back plate are polished to smooth rounded corners.

[0041] The T-shaped handle and the back plate are welded to form a whole, the upper part of the handle is used for operation and grip, and the lower part is welded to the spring plate to form an integrated structure;

[0042] A scraper made of spring steel, 1mm thick, 60mm wide, and 500-600mm long, is mounted beneath the backplate. The scraper's upper end is connected to the backplate with rivets, and due to its elasticity, its lower end can flare outward along the rivet as its center point. The scraper's width is slightly greater than the thickness of the narrow copper plate, and the end is bent at a 90-degree angle, approximately 2mm high, forming a cutting edge wide enough to cover the side of the narrow copper plate.

[0043] A flat airbag is installed between the scraper and backboard, with one side bonded to the backboard. Made of TPU rubber and reinforced fiber, the airbag measures 120mm long, 50mm wide, and 2mm thick. Operating pressure is 0.1 MPa. It is connected to the inflation and exhaust valves and the rubber airbag via an air pipe. When inflated, the maximum thickness is approximately 20mm. The air pipe passes through the vertical tube of the T-handle.

[0044] When the inflation and exhaust valve is closed, the rubber airbag and the flat airbag are connected by a pipe, and the flat airbag can be inflated by squeezing the rubber airbag; when the inflation and exhaust valve is opened, the flat airbag is connected to the atmosphere by inflation and exhaust.

[0045] In the standby state, the back plate and the scraper clamp the flat airbag between them due to the elastic force of the spring steel plate, and the air in the flat airbag is discharged through the inflation and exhaust valve. The maximum height of the three after being tightened is about 6mm, which is 10mm less than the width of the corner seam after the crystallizer copper plate is opened. The corner seam cleaning device can be inserted into the corner seam. The scraper edge is ground to a 70-degree tip angle. After the airbag is inflated, the scraper edge and the cut surface of the narrow copper plate still maintain edge line contact.

[0046] A method for using an airbag-type crystallizer corner seam cleaning device, comprising the airbag-type crystallizer corner seam cleaning device described above, is specifically performed as follows:

[0047] When in use, close the inflation and exhaust valve, squeeze the airbag manually, and the airbag will inflate, providing a maximum thrust of about 60kg, which can open the scraper. The thickness from the scraper edge to the back plate is found to be more than 12mm, which is greater than the 10mm width of the corner seam.

[0048] To use, insert the closed corner cleaning device into the open corner gap and under the copper plate, with the scraper facing the side of the narrow copper plate where debris is stuck. The back plate rests against the wide copper plate as a guide. Once in place, close the inflation and exhaust valves to inflate the device. Manually squeeze the rubber airbag through the air tube to inflate the flat airbag until the flat airbag inflates. One side of the bottom plate, bonded to the back plate, is in contact with the wide copper plate, while the other side pushes the scraper against the side of the narrow copper plate. Pull the handle up and down slightly, determining contact by the resistance between the scraper and the narrow plate. Once contact is established, stop inflating the airbag, maintaining pressure. Pull the handle up and down, moving the scraper up and down along the height of the narrow copper plate, completely removing debris from the entire side.

[0049] After the corners are scraped and cleaned, open the inflation and exhaust valve, the flat airbag is deflated and shrinks, the back plate and the scraper are tightened, the thickness becomes smaller, and it is pulled out from the corners to complete the cleaning of the corners.

[0050] In summary, the airbag-type crystallizer corner seam cleaning device and its use method have a simple structure, a small thickness, and can penetrate into a narrow space. The scraper opens under the push of the airbag, and the scraper fits tightly against the side of the narrow copper plate, resulting in a good cleaning effect. The thin film airbag can automatically adapt to the width of the corner seam after opening without the need for adjustment.

[0051] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0052] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An airbag type crystallizer corner seam cleaning device, characterized by: Includes T-shaped handle, backboard, scraper, rubber airbag, inflation and exhaust valve, air tube and flat airbag; The T-shaped handle is made of seamless steel pipe with appropriate wall thickness to ensure sufficient strength and rigidity; The back plate is made of spring steel plate with a thickness of 1mm and a width of 100mm. The thin spring plate is flexible and has appropriate hardness. The length is 1200mm. The thin spring plate is 300mm longer than the length of the crystallizer copper plate. It is inserted into the corner gap to reach the bottom of the copper plate. To prevent scratching the copper plate, the edges and right angles at the lower end of the back plate are polished into smooth rounded corners. The T-shaped handle and the back plate are welded to form a whole, the upper part of the handle is used for operation and grip, and the lower part is welded to the spring plate to form an integrated structure; A scraper made of a spring steel plate with a thickness of 1 mm, a width of 60 mm, and a length of 500-600 mm is installed at the lower part of the back plate. The upper end of the scraper is connected to the back plate with rivets. Due to the elasticity of the scraper, the lower end opens outward along the rivet as the center point. The width of the scraper is slightly larger than the thickness of the narrow copper plate. The end is bent into a 90-degree right angle and has a height of 2 mm to form a scraper cutting edge. The width of the edge covers the side of the narrow copper plate. A flat airbag is installed between the scraper and the backboard, with one side of the airbag bonded to the backboard. The airbag is made of TPU rubber and reinforced fiber, with dimensions of 120 mm long, 50 mm wide, and 2 mm thick. The working pressure is 0.1 MPa. It is connected to the inflation and exhaust valve and the rubber inflation bag through an air pipe. The maximum thickness after inflation is 20 mm. The air pipe path passes through the vertical tube of the T-shaped handle. When the inflation and exhaust valve is closed, the rubber airbag is connected to the flat airbag through a pipe, and the rubber airbag is squeezed to inflate the flat airbag; when the inflation and exhaust valve is opened, the flat airbag is connected to the atmosphere through inflation and exhaust. In the standby state, the back plate and the scraper clamp the flat airbag between them due to the elastic force of the spring steel plate, and the air in the flat airbag is discharged through the inflation and exhaust valve. The maximum height of the three after being tightened is 6mm, which is 10mm less than the width of the corner seam after the crystallizer copper plate is opened. The corner seam cleaning device is inserted into the corner seam. The scraper edge is ground to a 70-degree tip angle. After the airbag is inflated, the scraper edge and the cut surface of the narrow copper plate still maintain edge line contact.

2. A method for using an airbag-type mold corner seam cleaning device, characterized in that: The air bag type crystallizer corner seam cleaning device according to claim 1 is specifically operated as follows: When in use, close the inflation and exhaust valve, squeeze the airbag manually, and the airbag will inflate to provide a maximum thrust of 60kg. Open the scraper and the thickness from the scraper edge to the back plate should be more than 12mm, which is greater than the 10mm width of the corner seam. When in use, insert the corner seam cleaning device in a closed state into the opened corner seam and into the bottom of the copper plate, with the scraper facing the side of the narrow copper plate where the debris is stuck, and the back plate is attached to the wide copper plate as a guide support. After it is in place, close the inflation and exhaust valve to put it in an inflated state, squeeze the rubber airbag by hand to inflate the flat airbag through the air tube until the flat airbag bulges, and one side of the bottom plate attached to the back plate is in close contact with the wide copper plate, and the other side pushes the scraper to be in close contact with the side of the narrow copper plate, pull the handle up and down slightly, and judge whether the contact is close by the resistance between the scraper and the narrow panel. When the contact is close, stop inflating, keep the pressure of the airbag unchanged, pull the handle up and down, and drive the scraper to scrape up and down in the height direction of the side of the narrow copper plate, and the scraper completely scrapes off the debris on the entire side; After the corners are scraped and cleaned, open the inflation and exhaust valve, the flat airbag is deflated and shrinks, the back plate and the scraper are tightened, the thickness becomes smaller, and it is pulled out from the corners to complete the cleaning of the corners.

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