A double-plate double-pass converter slide slag blocking mechanism

Abstract

The present invention discloses a converter slide slag stopping mechanism, in which two specifications of slides are arranged in the slag stopping mechanism of the same specification, and the lower parts of the inner slide brick cavity and the outer slide brick cavity are both "V"-shaped structures. It only needs to install the inner slide positioning block under the inner slide brick cavity, remove and replace the outer slide clamping device of the outer slide brick cavity, and replace the water-cooled oil cylinder driving device with different strokes and the same installation size, so as to realize the free conversion from the large plate slag stopping mechanism with a long stroke to the fiber plate slag stopping mechanism with a short stroke. A stroke changing line is arranged above the sliding frame, which solves the problem of online replacement of the large plate slag stopping mechanism and the fiber plate slag stopping mechanism due to the different slag stopping strokes. It solves the problem of high operating cost of slide slag stopping due to low steel output of converters below 80 tons, and reduces the operating cost of slide slag stopping after the application of inlaid zirconium material technology. The slag stopping mechanism has low operating cost, wide application range, high structural strength, good safety performance, long service life, and simple operation and maintenance.

Description

Technical Field

[0001] The invention belongs to the field of steelmaking machinery, and in particular relates to a double-plate double-pass converter slide slag blocking mechanism installed at a converter tapping port. Background Art

[0002] In a modern steelmaking production workshop, when slag is detected during the converter tapping process, the converter slide slag blocking mechanism installed on the outside of the tapping port is used to drive the oil cylinder to quickly close the outer slide and the inner slide, completely blocking the slag in the furnace, completing the slide slag blocking operation during the tapping process. The tapping port slide slag blocking technology has a good slag blocking effect and has been promoted and applied in more and more steel mills.

[0003] The converter slide slag blocking mechanism currently known in the market has the following problems: First, the same specification and model of slag blocking mechanism is equipped with corresponding inner and outer slides of the same specification. The applicable converter capacity generally varies in the range of 0 to 100 tons. The slag blocking needs of converters with different capacities can only be met by changing the size of the slide aperture. Currently, small and medium-sized converters with a converter capacity of 50 to 150 tons generally use the same specification and model of slag blocking mechanism for slide slag blocking. Since the cost of the slide accounts for more than 60% of the operating cost of the slide slag blocking, the operating cost of the same specification and model of slag blocking mechanism when used for converters below 150 tons is more than twice that of the slide, which greatly restricts the promotion and application of the tapping mouth slag blocking mechanism on small converters of 50-80 tons. Second, in order to increase the service life of the slide plate when the converter is used for slag blocking, currently known large and medium-sized converters with a capacity of more than 100 tons generally use the technology of inlaying zirconium materials on the slide plate to block the slag at the steel outlet. Zirconium materials have high density and high unit price, and account for a high proportion of the production cost of the slide plate. Currently, the method of reducing the thickness of the zirconium plate is generally used to reduce the production cost of the slide plate. This can easily lead to the brittle and easily broken zirconium materials breaking and falling off during the slag blocking process, as well as accidents of steel seepage between the slide plates, which can seriously cause steel leakage during steelmaking. Third, currently known technical transformations of steel mills often lead to a substantial increase in steelmaking capacity. For this reason, a larger slag blocking mechanism must be replaced to meet the needs of the slide plate for slag blocking and steel tapping with a larger steel output from the converter. Since the slag blocking mechanism is equipped with a large number of auxiliary equipment and is expensive, after the converter is upgraded, in addition to replacing the large-scale steel outlet slag blocking mechanism, it is necessary to add a large number of auxiliary equipment that matches it and eliminate the original auxiliary equipment, which increases the production cost of the converter upgrade. Summary of the Invention

[0004] In order to solve the above problems, the present invention proposes a double-plate double-pass converter slide slag blocking mechanism.

[0005] The technical solution of the present invention is: a double-plate double-pass converter slide slag blocking mechanism, including a connecting plate and a slag blocking mechanism, the upper and middle parts of the connecting plate are respectively provided with a water-cooled oil cylinder drive device and an outer water outlet, the slag blocking mechanism is installed on the outside of the inner water outlet, the slag blocking mechanism includes a fixed frame, an inner slide, a bracket, a sliding frame, an outer slide, an outer water outlet seat, an outer water outlet, a tightener, and a mechanism protective plate, the outer side of the fixed frame is sequentially provided with a sliding frame and a bracket, the outer side of the sliding frame is sequentially provided with an outer water outlet seat, a mechanism protective plate, and a tightener, the sliding frame brick cavity, the outer water outlet seat, and the mechanism protective plate are respectively provided with bolt mounting holes, and the connecting bolts are sequentially passed through the sliding frame bricks The cavity, outer water nozzle seat, mechanism protection plate and connect them together, the sliding frame is installed in the bracket, two fixed slide rails are symmetrically arranged on both sides of the inner surface of the bracket, the inner surface of the sliding frame is provided with a movable slide rail in sliding contact with the fixed slide rail, the inner slide plate is installed in the brick cavity of the fixed frame, the outer slide plate is installed in the brick cavity of the sliding frame, the outer water nozzle is fixed to the outside of the outer slide plate with a tightener, the inner slide plate has two specifications of inner large plate and inner fiber board, the corresponding outer slide plate has two specifications of outer large plate and outer fiber board, the inner large plate and outer large plate constitute a large plate slag stopping mechanism, the inner fiber board and outer fiber board constitute a fiber board slag stopping mechanism, the large plate slag stopping mechanism and the fiber board slag stopping mechanism have different slag stopping strokes.

[0006] Preferably, the short side length P and short side angle R of the inner large plate and the inner fiber board are the same, the short side length P and short side angle R of the outer large plate and the outer fiber board are the same, the male opening size of the connection part between the inner large plate, the inner fiber board and the inner water outlet is the same, the connection form and connection size of the connection part between the outer large plate, the outer fiber board and the outer water outlet are the same, and the thickness from the sliding surface of the large plate to the back surface is the same as the thickness from the sliding surface of the fiber board to the back surface.

[0007] Preferably, the total length of the inner or outer large plate is M, the total width is F, and the aperture is U, and the total length of the inner fiberboard or outer fiberboard is N, the total width is E, and the aperture is D, wherein M>N, F>E, U>D.

[0008] Preferably, a standard inner skateboard pressing device is arranged above the inner skateboard brick cavity of the fixed frame, and an inner skateboard positioning block dedicated to the inner fiberboard is arranged below. The inner skateboard pressing device is used to press the inner board into the inner skateboard brick cavity, and the inner skateboard pressing device and the inner skateboard positioning block are used to press the inner fiberboard into the inner skateboard brick cavity.

[0009] Preferably, the lower part of the inner skateboard brick cavity of the fixed frame is set as a "V"-shaped structure, and the inner skateboard positioning block consists of a fixed block and an auxiliary block. The fixed blocks are set on both sides of the lower middle part of the inner skateboard brick cavity, and the auxiliary block is set at the bottom of the inner skateboard brick cavity.

[0010] Preferably, a "V"-shaped structure is provided below the outer skateboard brick cavity of the sliding frame, a bolt mounting hole is provided at the edge of the "V"-shaped structure, an outer large plate pressing device and an outer fiberboard pressing device are provided above the brick cavity, the outer large plate pressing device presses the outer large plate into the outer skateboard brick cavity, and the outer fiberboard pressing device presses the outer fiberboard into the outer skateboard brick cavity.

[0011] Preferably, the stroke of the large plate slag blocking mechanism is greater than that of the fiber plate slag blocking mechanism, and correspondingly, two water-cooled oil cylinder driving devices with different strokes and the same installation size are arranged on the connecting plate.

[0012] Preferably, a stroke change line with a V-shaped cross section is provided on the upper outer side of the sliding frame, which is aligned with the top surface of the bracket, and the corresponding slag blocking mechanism change stroke S is ≤ the fiberboard slag blocking mechanism stroke.

[0013] Preferably, the outer main plate, the outer fiber plate and the outer water outlet are connected in a flat-end form, a mother-and-child form or a mother-and-child form.

[0014] Preferably, the outer large plate, the inner large plate, the outer fiberboard and the inner fiberboard are all spindle-shaped with arcs at the upper and lower ends, and the back structure of the skateboard is a steel shell type or an asbestos board type.

[0015] The beneficial technical effects of the present invention are:

[0016] 1. The short side length P and short side angle R of the large plate and the fiber plate of the present invention are set to be the same, which ensures the versatility of the slide plate clamping device in the fixed frame, ensures the "V"-shaped structure of the lower part of the outer slide plate brick cavity and the position of the bolt mounting holes on its edge, eliminates the outer slide plate positioning block in the outer slide plate brick cavity of the sliding frame, solves the problem of having to disassemble and install the outer slide plate positioning angle block at the same time when disassembling and installing the outer nozzle seat and the mechanism protection plate, and increases the structural strength of the sliding frame and the service life of the slag retaining mechanism.

[0017] 2. The fixed block of the inner slide positioning block is set in the middle and lower part of the inner slide brick cavity instead of the bottom, which ensures that the lower part of the inner slide brick cavity of the fixed frame is a stronger "V"-shaped structure, thereby increasing the service life of the fixed frame and the slag blocking mechanism.

[0018] 3. For the converter slide slag stopping mechanism of the same specification and model, it is only necessary to install the inner slide positioning block under the inner slide brick cavity and replace the outer slide clamping device above the outer slide brick cavity, and replace the water-cooled oil cylinder drive device with different strokes and the same installation size, so as to realize the free conversion from the long-stroke large-plate slag stopping mechanism to the short-stroke fiberboard slag stopping mechanism. When the converter capacity is small, the fiberboard slag stopping mechanism is used for slag stopping and steelmaking. When the converter capacity is large, the large-plate slag stopping mechanism is used for slag stopping and steelmaking. Since the weight of the fiberboard slide is less than that of the large-plate slide, this solves the problem of high operating cost of the tapping port slide slag stopping caused by small converter capacity and low steel tapping. For small and medium-sized converters of 50 to 150 tons, the use of a one-machine double-plate slag stopping mechanism of the same specification and model greatly reduces the slag stopping operating cost of the slag stopping mechanism on small converters below 80 tons, ensuring the promotion and application of the slag stopping mechanism on small converters below 80 tons. For the skateboard using the skateboard inlaid zirconium material technology, the length of the zirconium plate is directly related to the slag blocking stroke. A short-stroke fiberboard slag blocking mechanism is used for slag blocking and steel tapping, which reduces the size of the skateboard while also reducing the length and cost of the zirconium plate. The application of the fiberboard slag blocking mechanism + skateboard inlaid zirconium material technology improves the service life of the skateboard and the slag blocking effect of the converter skateboard, further reduces the operating cost of the skateboard slag blocking, and promotes the promotion and application of the skateboard inlay technology on smaller capacity converters.

[0019] 4. After the technical transformation of steelmaking, the output of converter steel has been greatly improved. It is only necessary to replace the slag blocking slides of different sizes and use the long-stroke large-plate slag blocking mechanism to solve the problem of increased converter steel output. While the specifications and models of the slag blocking mechanism remain unchanged, it can fully meet the different converter slag blocking requirements before and after the technical transformation of the converter, greatly reducing the cost of the converter technical transformation and playing a positive role in promoting the upgrading and transformation of the converter in the steel plant.

[0020] 5. When the slag stopping mechanism is maintained offline, the offline cylinder stroke is the same as the water-cooling cylinder stroke of the large plate slag stopping mechanism, and the offline cylinder stroke is greater than the water-cooling cylinder stroke of the fiberboard slag stopping mechanism. After the offline maintenance is completed, the stroke replacement line on the outside of the sliding frame is aligned with the top surface of the bracket of the bracket. At this time, the replacement stroke S of the slag stopping mechanism is ≤ the slag stopping stroke of the fiberboard slag stopping mechanism, which solves the problem that the water-cooling cylinder and the fiberboard slag stopping mechanism cannot be connected during online replacement due to the offline cylinder stroke being greater than the water-cooling cylinder stroke of the fiberboard slag stopping mechanism. The setting of the sliding frame stroke replacement line cancels the complex stroke limiting device that must be set due to the different slag stopping strokes of the slag stopping mechanism. The stroke replacement line is simple to process and does not affect the structural strength of the sliding frame, further improving the service life of the slag stopping mechanism and reducing the production cost of the slag stopping mechanism.

[0021] The present invention arranges two specifications of slide plates with the same short side length P and short side angle R in the converter slag stopping mechanism of the same specification and model, ensuring that it is only necessary to install the inner slide plate positioning block below the inner slide plate brick cavity, replace the outer fiber plate pressing device above the outer slide plate brick cavity, and replace the water-cooled oil cylinder driving device with different strokes on the connecting plate to complete the free transformation from the long-stroke large plate slag stopping mechanism to the short-stroke fiber plate slag stopping mechanism. The arrangement of the stroke replacement line on the outer side of the sliding frame solves the problem of online replacement of the slag stopping mechanism caused by different slag stopping strokes. It is a double-plate double-stroke slag stopping mechanism that can freely select between a large slide plate and a small slide plate according to changes in the converter steel output and the requirements of the steel plant. It has low operating cost, wide application range, high structural strength, good safety performance, long service life, and simple operation and maintenance. It is an ideal alternative product for upgrading the current converter slide plate slag stopping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the slag blocking mechanism of the present invention after it is opened;

[0023] Figure 2 1. This is a schematic longitudinal cross-sectional view of the gate valve of the present invention (offline maintenance completed, with the offline cylinder drive device hidden);

[0024] Figure 3 1. It is a schematic diagram (partial cross-section) of the three-dimensional structure of the fixed frame installed with the outer plate of the present invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the fixed frame of the present invention for installing the outer fiber board (1 / 4 cutaway);

[0026] Figure 5 It is a front view of the fiberboard and the large board of the present invention;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the sliding frame and the outer nozzle seat of the present invention (with the hidden mechanism protection plate);

[0028] Figure 7 This is a schematic diagram of the three-dimensional structure of the sliding frame of the present invention for installing the outer fiberboard and the outer nozzle (the outer nozzle seat and the mechanism protection plate are hidden, and it is a partial cross-section);

[0029] Figure 8 Schematic diagram of the three-dimensional structure of the sliding frame of the present invention installed with the outer plate (hiding the outer nozzle seat and mechanism protection plate);

[0030] Figure 9 A front view of the inner slide fixing block of the fixed frame of the present invention.

[0031] In the figure, 10. Fixed frame, 11. Inner slide clamping device, 12. Inner large plate, 121. Inner slide male port, 13. Inner fiberboard, 14. Fixed block, 15. Auxiliary block, 20. Sliding frame, 201. Stroke change line, 21. Outer nozzle seat, 22. Connecting bolt, 23. Bolt mounting hole, 24. Outer large plate, 241. Outer slide male port, 25. Outer large plate clamping device, 26. Outer fiberboard, 27. Outer fiberboard clamping device, 29. Movable slide rail, 30. Outer nozzle, 31. Mechanism protection plate, 32. Tightener, 40. Bracket, 401. Bracket top surface, 41. Fixed slide rail;

[0032] The letters in the figure represent: S--replacement stroke, P--short side length, R--short side angle, D--fiberboard aperture, E--fiberboard total width, N--fiberboard total length, U--large board aperture, F--large board total width, M--large board total length. DETAILED DESCRIPTION

[0033] Example 1, see the attached Figure 1 - 9. A double-plate double-pass converter slide slag blocking mechanism, comprising a connecting plate and a slag blocking mechanism, wherein a water-cooled oil cylinder driving device and an external water inlet are respectively arranged at the upper and middle parts of the connecting plate, and the slag blocking mechanism is installed on the inner water inlet and the outer side of the connecting plate, and the slag blocking mechanism comprises a fixed frame, an inner slide, a bracket, a sliding frame, an outer slide, an outer water inlet seat, an outer water inlet, a tightener, and a mechanism protective plate. The sliding frame and the bracket are arranged in sequence on the outer side of the fixed frame, and the water inlet seat, the mechanism protective plate and the tightener are arranged in sequence on the outer side of the sliding frame. Bolt mounting holes are respectively arranged on the sliding frame brick cavity, the external water inlet seat, and the mechanism protective plate. The connecting bolts pass through the sliding frame brick cavity, the external water inlet seat, the mechanism protective plate in sequence. The guard plates are connected together, the sliding frame is installed in the bracket, two fixed slide rails are symmetrically arranged on both sides of the inner surface of the bracket, the inner surface of the sliding frame is provided with a movable slide rail that is in sliding contact with the fixed slide rail, the inner slide plate is installed in the brick cavity of the fixed frame, the outer slide plate is installed in the brick cavity of the sliding frame, the outer water outlet is fixed to the outside of the outer slide plate with a tightener, the inner slide plate has two specifications of inner large plate and inner fiber plate, the corresponding outer slide plate has two specifications of outer large plate and outer fiber plate, the inner large plate and the outer large plate constitute the large plate (i.e. large slide plate) slag stopping mechanism, the inner fiber plate and the outer fiber plate constitute the fiber plate (i.e. small slide plate) slag stopping mechanism, the large plate slag stopping mechanism and the fiber plate slag stopping mechanism have different slag stopping strokes.

[0034] The short side lengths P and the short side included angles R of the inner hard board and the inner fiber board are the same. The short side lengths P and the short side included angles R of the outer hard board and the outer fiber board are the same. The male port dimensions of the connection parts of the inner hard board, the inner fiber board and the inner water inlet are the same. The connection forms and connection dimensions of the connection parts of the outer hard board, the outer fiber board and the outer water inlet are the same. The thickness from the sliding surface to the back of the hard board is the same as the thickness from the sliding surface to the back of the fiber board. The total length of the inner hard board or the outer hard board is M, the total width is F, and the hole diameter is U. The total length of the inner fiber board or the outer fiber board is N, the total width is E, and the hole diameter is D, where M > N, F > E, and U > D.

[0035] An inner slide plate pressing device is arranged above the inner slide plate brick cavity of the fixed frame, and an inner slide plate positioning block dedicated to the inner fiber board is arranged below. The inner hard board is pressed in the inner slide plate brick cavity through the inner slide plate pressing device, and the inner fiber board is pressed in the inner slide plate brick cavity through the inner slide plate pressing device and the inner slide plate positioning block.

[0036] The inner slide plate positioning block consists of a fixed block and an auxiliary block. The fixed block is arranged in the middle and lower part rather than the bottom of the inner slide plate brick cavity, and the auxiliary block is arranged at the bottom of the inner slide plate brick cavity, ensuring that the lower part of the inner slide plate brick cavity of the fixed frame is a "V"-shaped structure, improving the structural strength and service life of the inner slide plate brick cavity of the fixed frame.

[0037] The lower part of the outer slide plate brick cavity of the sliding frame is set as a "V"-shaped structure, and bolt mounting holes are arranged at the edge of the "V"-shaped structure. Therefore, the outer slide plate positioning block is cancelled, solving the problem that the outer slide plate positioning block must be disassembled and assembled simultaneously when disassembling and assembling the inner water inlet seat and the mechanism protection plate, and reducing the labor intensity of workers. An outer hard board pressing device and an outer fiber board pressing device are arranged above the brick cavity, pressing the outer hard board and the outer fiber board in the outer slide plate brick cavity respectively.

[0038] The stroke of the hard board slag blocking mechanism > the stroke of the fiber board slag blocking mechanism. Correspondingly, two water-cooled oil cylinder driving devices with different strokes and the same installation dimensions are arranged correspondingly above the connecting plate. When using different-sized slide plates, only by replacing the water-cooled oil cylinder driving devices with different strokes can the length change of the corresponding slag blocking stroke of the slag blocking mechanism be completed.

[0039] A left-right through stroke replacement line with a cross-sectional shape of "V" or "凵" is arranged at the upper part outside the sliding frame. The off-line oil cylinder stroke during the maintenance of the slag blocking mechanism is the same as the water-cooled oil cylinder stroke of the hard board slag blocking mechanism. After the maintenance of the slag blocking mechanism is completed, align the stroke replacement line on the sliding frame with the top surface of the support of the support, so that the replaced stroke S of the slag blocking mechanism after maintenance ≤ the slag blocking stroke of the fiber board slag blocking mechanism, solving the problem that the water-cooled oil cylinder and the fiber board slag blocking mechanism cannot be connected during on-line replacement due to the off-line oil cylinder stroke being greater than the water-cooled oil cylinder stroke of the fiber board slag blocking mechanism.

[0040] The connection mode of the outer large plate, outer fiber plate and outer water outlet is flat-end form, mother-child form or mother-child form, preferably flat-end form, which reduces the production cost of the outer slide plate and the outer water outlet and increases the safety of the connection between the outer slide plate and the outer water outlet.

[0041] The outer shapes of the large board and the fiber board are both spindle-shaped with arcs at the upper and lower ends. The back structure of the skateboard is a steel shell or asbestos board form, preferably an asbestos board form, which reduces the production cost of the skateboard.

[0042] The use process and principle of the present invention are:

[0043] First, after determining the fiberboard (i.e. small skateboard) slag blocking mechanism according to the capacity of the converter, a short-stroke water-cooled oil cylinder drive device is arranged above the connecting plate, an inner skateboard clamping device is installed above the skateboard brick cavity in the fixed frame, and an inner skateboard positioning block is installed below, an outer fiberboard clamping device is installed above the skateboard brick cavity outside the sliding frame, and the inner fiberboard, outer fiberboard and outer water outlet are installed in the fixed frame and the sliding frame respectively to complete the production preparation of the fiberboard slag blocking mechanism; secondly, when the fiberboard slag blocking mechanism performs skateboard slag blocking and steelmaking, the water-cooled oil cylinder drives the sliding frame and drives the fiberboard and the outer water outlet to move, so that the fiberboard and the outer water outlet are in an open or closed state, completing the entire steelmaking slag blocking process. Since the fiberboard is light in weight and the corresponding fiberboard slag blocking mechanism has a short stroke, the operating cost of the skateboard slag blocking of small-capacity converters is greatly reduced while ensuring the safety of the skateboard slag blocking; thirdly, when the fiberboard slag blocking mechanism is offline for maintenance, the offline oil cylinder is used to depressurize the slag blocking mechanism, and the mechanism is cleaned, the inner fiberboard and outer fiberboard are replaced, and then the The slag stopping mechanism is pressurized and the external water inlet is replaced. Finally, the stroke replacement line of the sliding frame is aligned with the top surface of the bracket of the bracket, so that the replacement stroke S of the slag stopping mechanism is ≤ the stroke of the fiberboard slag stopping mechanism, ensuring the normal connection between the fiberboard slag stopping mechanism and the water-cooled oil cylinder during online replacement (when the routine offline maintenance operation is completed, the offline oil cylinder piston rod is fully extended and the slag stopping mechanism stroke is maximized); Fourth, after the technical transformation of the steelmaking plant is completed and the steel output of the converter is greatly increased, the short-stroke water-cooled oil cylinder on the connecting plate is replaced with a long-stroke water-cooled oil cylinder, the inner skateboard positioning block of the skateboard brick cavity in the fixed frame is removed, and the outer large plate clamping device of the outer skateboard brick cavity of the sliding frame is replaced with an outer fiberboard clamping device to complete the transformation from the fiberboard slag stopping mechanism to the large plate slag stopping mechanism, and then larger inner and outer large plates are installed on the fixed frame and the sliding frame, the external water inlet remains unchanged, and the specifications of the slag stopping mechanism remain unchanged. The large plate slag stopping mechanism is used to complete the new converter skateboard slag stopping requirements after the technical transformation, which greatly reduces the cost of the converter technical transformation.

Claims

1. A double-plate double-pass converter slide slag blocking mechanism, comprising a connecting plate and a slag blocking mechanism, wherein the upper and middle portions of the connecting plate are provided with a water-cooled oil cylinder drive device and an outer nozzle, respectively; the slag blocking mechanism is mounted on the outer side of the inner nozzle; the slag blocking mechanism comprises a fixed frame, an inner slide, a bracket, a sliding frame, an outer slide, an outer nozzle seat, an outer nozzle, a tightener, and a mechanism protective plate, characterized in that: The outer side of the sliding frame is provided with a sliding frame and a bracket in sequence, and the outer side of the sliding frame is provided with an outer nozzle seat, a mechanism protection plate, and a tightening device in sequence. The sliding frame brick cavity, the outer nozzle seat, and the mechanism protection plate are respectively provided with bolt mounting holes, and the connecting bolts pass through the sliding frame brick cavity, the outer nozzle seat, and the mechanism protection plate in sequence and connect them together. The sliding frame is installed in the bracket, and two fixed slide rails are symmetrically provided on both sides of the inner surface of the bracket. The inner surface of the sliding frame is provided with a movable slide rail that is in sliding contact with the fixed slide rail. The inner slide plate is installed in the brick cavity of the fixed frame, and the outer slide plate is installed in the brick cavity of the sliding frame. The outer nozzle is fixed to the outer side of the outer slide plate with a tightening device. The inner slide plate has two specifications of inner large plate and inner fiber plate, and the corresponding outer slide plate has two specifications of outer large plate and outer fiber plate. The inner large plate and the outer large plate constitute a large plate slag stopping mechanism, and the inner fiber plate and the outer fiber plate constitute a fiber plate slag stopping mechanism. The slag stopping stroke of the large plate slag stopping mechanism and the fiber plate slag stopping mechanism are different. The short side lengths P and short side angles R of the inner large plate and the inner fiber plate are the same, and the short side lengths P and short side angles R of the outer large plate and the outer fiber plate are the same.

2. A double-plate double-pass converter slide slag blocking mechanism according to claim 1; characterized in that: The male opening size of the inner large plate, inner fiber plate and inner water outlet connection parts is the same, the connection form and connection size of the outer large plate, outer fiber plate and outer water outlet connection parts are the same, and the thickness from the large plate sliding surface to the back surface is the same as the thickness from the fiber plate sliding surface to the back surface.

3. The double-plate double-pass converter slide slag blocking mechanism according to claim 2, characterized in that: The total length of the inner or outer large plate is M, the total width is F, and the aperture is U. The total length of the inner fiberboard or outer fiberboard is N, the total width is E, and the aperture is D, wherein M>N, F>E, U>D.

4. The double-plate dual-pass converter slide slag blocking mechanism according to claim 1, characterized in that: A standard inner skateboard pressing device is arranged above the inner skateboard brick cavity of the fixed frame, and an inner skateboard positioning block dedicated to the inner fiberboard is arranged below. The inner skateboard pressing device is used to press the inner board into the inner skateboard brick cavity, and the inner skateboard pressing device and the inner skateboard positioning block are used to press the inner fiberboard into the inner skateboard brick cavity.

5. The double-plate double-pass converter slide slag blocking mechanism according to claim 4, characterized in that: The lower part of the inner skateboard brick cavity of the fixed frame is set as a "V"-shaped structure. The inner skateboard positioning block consists of a fixed block and an auxiliary block. The fixed blocks are set on both sides of the lower middle part of the inner skateboard brick cavity, and the auxiliary block is set at the bottom of the inner skateboard brick cavity.

6. The double-plate double-pass converter slide slag blocking mechanism according to claim 1, characterized in that: A "V"-shaped structure is arranged below the outer slide brick cavity of the sliding frame, and a bolt mounting hole is arranged on the edge of the "V"-shaped structure. An outer large plate pressing device and an outer fiber board pressing device are arranged above the brick cavity. The outer large plate pressing device presses the outer large plate into the outer slide brick cavity, and the outer fiber board pressing device presses the outer fiber board into the outer slide brick cavity.

7. The double-plate dual-pass converter slide slag blocking mechanism according to claim 1, characterized in that: The stroke of the large plate slag blocking mechanism is greater than that of the fiber plate slag blocking mechanism, and correspondingly two water-cooled oil cylinder driving devices with different strokes and the same installation size are arranged on the connecting plate.

8. The double-plate dual-pass converter slide slag blocking mechanism according to claim 1, characterized in that: A V-shaped stroke change line is provided on the upper outer side of the sliding frame. The stroke change line is aligned with the top surface of the bracket. The corresponding slag stop mechanism change stroke S is ≤ the fiberboard slag stop mechanism stroke.

9. The double-plate dual-pass converter slide slag blocking mechanism according to claim 1, characterized in that: The connection mode of the outer main plate, outer fiber plate and outer water inlet is flat-end type, mother-and-child type or mother-and-child type.

10. The double-plate dual-pass converter slide slag blocking mechanism according to claim 1, characterized in that: The outer large plate, inner large plate, outer fiber board and inner fiber board are all spindle-shaped with arcs at the upper and lower ends, and the back structure of the skateboard is steel shell type or asbestos board type.

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