A heat-insulating rail scale for weighing molten iron and its laying method

Abstract

A heat-insulating rail scale for weighing molten iron and its laying method belong to the technical field of high-temperature hot-melt weighing in iron and steel metallurgy. The heat-insulating rail scale for weighing molten iron includes a weighing platform, a support platform and a foundation wall. Support platforms are respectively arranged on both sides of the weighing platform, and foundation walls are respectively arranged at both ends of the weighing platform. There is a sealed flexible connection between the weighing platform and the support platform and the foundation wall; heat-insulating layers and heat-resistant layers are both arranged on the weighing platform and the support platform. A plurality of dividing components are evenly distributed in the heat-insulating layer, and the plurality of dividing components form a load-bearing platform for carrying the heat-resistant layer. The beneficial effect of the present invention is that the overall structure of the heat-insulating rail scale for weighing molten iron is stable, high-temperature resistant and has a long service life, preventing molten iron from splashing into the gaps around the weighing platform. Moreover, in the case of molten iron heat radiation and a small amount of leakage, it will not cause damage to the rail scale, ensuring the reliable, accurate and stable operation of the weighing and metering system.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature hot-melt weighing in iron and steel metallurgy, and particularly relates to a heat-insulating rail scale for molten iron weighing and a laying method thereof. Background Art

[0002] Weighing molten iron during the tapping process of a blast furnace is necessary. Firstly, it can control the tapping volume. Secondly, it can know the actual delivery volume of each ladle. Thirdly, it can be used as the basis for the swing of the swing chute, achieving multiple benefits. However, in the prior art, many iron-making plants use traditional rail scales. There are certain gaps between the weighing platform of the traditional rail scale and the surrounding area. After molten iron and molten steel in metallurgy at high temperature leak and splash into it and get stuck with the weighing platform, it will affect the accurate weighing of the metering system. Moreover, the heat radiation (baking) generated by high-temperature hot-melt in metallurgy will also damage the rail scale. In the prior art, a method of laying refractory bricks on the surface of the rail scale is adopted to prevent the damage caused by high-temperature hot-melt in metallurgy to the rail scale. However, problems such as unevenness and unstable structure will occur when laying refractory bricks on the weighing platform. Therefore, it cannot ensure the reliable, accurate, and stable operation of the weighing and metering system in a harsh high-temperature environment. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a heat-insulating rail scale for molten iron weighing, which has a stable overall structure, is resistant to high temperature, can prevent molten iron from splashing into the gaps around the weighing platform, and will not be damaged under heat radiation (baking) and a small amount of leakage, and can ensure the reliable, accurate, and stable operation of the weighing and metering system.

[0004] To achieve the above object, the technical solution adopted by the present invention to solve its technical problems is: the heat-insulating rail scale for molten iron weighing includes a weighing platform, a support platform, and a foundation wall. The support platforms are respectively arranged on both sides of the weighing platform, and the foundation walls are respectively arranged at both ends of the weighing platform. The weighing platform is hermetically and softly connected to the support platform and the foundation wall; heat-insulating layers and heat-resistant layers are arranged on both the weighing platform and the support platform, and a plurality of dividing components are evenly distributed in the heat-insulating layers. The plurality of dividing components form a load-bearing platform for carrying the heat-resistant layer.

[0005] Further, a weighing gap is formed between the weighing platform and the support platform and the foundation wall at intervals, and a sealing and isolating component is arranged in the weighing gap. The sealing and isolating component is softly connected to the weighing platform.

[0006] Further, the sealing and isolating component includes an arc-shaped steel belt and an asbestos isolation layer filled inside it. One side of the arc-shaped steel belt contacts the weighing platform, and the other side of the arc-shaped steel belt is rigidly connected to the support platform and the foundation wall.

[0007] Further, the arc-shaped steel belt is connected and fixed to the support platform and the foundation wall by welding or threaded connection.

[0008] Furthermore, the heat insulating layer is configured as an asbestos layer, the heat-resistant layer is formed by refractory bricks laid flat on the dividing components, and the dividing components are respectively arranged at both ends of the refractory bricks.

[0009] Furthermore, the dividing component includes a support platform, a vertical partition plate, a support foot and a fixing screw. The vertical partition plate is arranged in the middle of the upper end of the support platform, and the refractory bricks are supported between adjacent vertical partition plates and the support platform; the support feet are respectively arranged on both sides of the lower end of the support platform, and the support feet pass through the thermal insulation layer and contact the weighing platform; the fixing screw is arranged in the middle of the lower end of the support platform, and the fixing screw passes through the thermal insulation layer and the weighing platform in turn and is fastened by a nut.

[0010] Furthermore, the height of the vertical partition plate is 15 mm to 20 mm less than the thickness of the refractory bricks, the gaps between adjacent refractory bricks are filled with a refractory mud layer, and a quartz sand layer is laid on the upper end of the heat-resistant layer, and the thickness of the quartz sand layer 10 is 40 mm to 50 mm.

[0011] Furthermore, the weighing platform includes a load-bearing panel I, a support frame I and a weighing body fixedly connected from top to bottom, steel rails are arranged on both sides of the load-bearing panel I, the weighing body is connected in the weighing pit through a weighing sensor, and the supporting platform includes a load-bearing panel II and a support frame II fixedly connected, the support frame II is fixed on the cast foundation, and the support frame I and the support frame II are both formed by staggered welding of transverse channel steels and longitudinal channel steels.

[0012] A method for laying a heat-insulated rail scale for weighing molten iron comprises the following steps:

[0013] 1) Install the sealing isolation component: place the curved steel belt in the weighing gap, fix one side of the curved steel belt to the bottom of the supporting platform and the foundation wall, make the other side of the curved steel belt contact with the outer edge of the weighing platform, fill the upper surface of the curved steel belt with an asbestos isolation layer and make it fill the weighing gap;

[0014] 2) Laying the insulation layer and the partitioning components: Plan the pattern of laying the partitioning components on the weighing platform and the supporting platform respectively, make holes on the weighing platform according to the spacing between the fixing screws at the lower ends of the partitioning components, and then lay the insulation layer on the weighing platform and the supporting platform respectively, insert the fixing screws of multiple partitioning components into the corresponding holes on the weighing platform, and use nuts to pre-tighten the fixing screws so that the supporting feet of the partitioning components are in contact with the surface of the weighing platform;

[0015] 3) Laying the heat-resistant layer: embed each refractory brick between the vertical partition plate and the support platform between adjacent partition parts. After the overall laying and adjustment, tighten the nut on the fixing screw to firmly position the partition part on the weighing platform, and at the same time make the support platform compact the heat insulation layer;

[0016] 4) Filling and finishing the surface of the heat-resistant layer: Fill the gaps between adjacent refractory bricks laid with refractory mortar layers, and use asbestos to fill other gaps. After the refractory mortar layer dries, lay a quartz sand layer with a thickness of 40 mm to 50 mm on the surface of the heat-resistant layer.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. Compared with the prior art, the rail scale designed by the present invention seals and soft-connects the gaps between the weighing platform, the support platform and the foundation wall, which not only prevents the molten iron from flowing into the weighing pit and reducing the weighing accuracy, but also effectively soft-connects, meets the requirements of the independence of the weighing platform, and ensures the weighing accuracy; by setting the heat insulation layer and the heat-resistant layer on the weighing platform and the support platform, it prevents the molten iron from splashing and leaking out and directly contacting the weighing platform and its surrounding components, thus preventing damage to the weighing and metering system, extending the service life of the rail scale. At the same time, the dividing components are evenly distributed in the heat insulation layer, so that the dividing components not only play the role of bearing the heat-resistant layer, improving the strength and stability of the overall structure, but also form a flat load-bearing platform surface, making the surface of the heat-resistant layer more flat, and further ensuring the reliable, accurate and stable operation of the weighing and metering system.

[0019] 2. Specifically, the soft connection between the weighing platform, the support platform and the foundation wall is realized through a sealing and isolating component. The sealing and isolating component includes an arc-shaped steel belt and an asbestos isolation layer filled inside it. One end of the arc-shaped steel belt is rigidly connected to the support platform and the foundation wall, and the other end of the arc-shaped steel belt is a free end. The asbestos isolation layer fills the weighing gap, effectively preventing the molten iron from splashing in. The strength of the arc-shaped steel belt is sufficient to bear the weight of the splashed molten iron. This structure of the sealing and soft connection can facilitate the replacement of a new asbestos isolation layer according to needs, with low cost, and effectively ensures the requirements of the independence of the weighing platform; the dividing component is a steel member, and the refractory bricks forming the heat-resistant layer are carried between the vertical partition plate on it and the support platform, supported on the weighing platform through support feet, and firmly connected to the weighing platform through fixing screws and nuts, making the laying of the refractory bricks more flat and stable, and improving the overall service life.

[0020] In summary, the heat-insulated rail scale for weighing molten iron has a stable overall structure, high temperature resistance, and a long service life. It prevents the molten iron from splashing and falling into the gaps around the weighing platform, and in the case of heat radiation and a small amount of leakage of molten iron, it will not cause damage to the rail scale, ensuring the reliable, accurate and stable operation of the weighing and metering system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following briefly describes the content expressed in each drawing of the specification of the present invention and the marks in the drawings:

[0022] Figure 1 is the front view of the present invention;

[0023] Figure 2 is the top view of the present invention;

[0024] Figure 3 is the front view of the dividing component in the present invention;

[0025] Figure 4 is Figure 3 the side view of;

[0026] The markings in the above figures are all: 1. weighing platform, 11. bearing panel I, 12. support frame I, 13. weighing body, 2. support platform, 21. bearing panel II, 22. support frame II, 3. foundation wall, 4. heat insulation layer, 5. heat-resistant layer, 51. refractory brick, 6. dividing component, 61. support table, 62. vertical partition board, 63. support foot, 64. fixing screw, 7. weighing gap, 8. sealing and isolating component, 81. arc steel strip, 82. asbestos isolation layer, 9. refractory mud layer, 10. quartz sand layer, 14. rail, 15. load cell, 16. weighing foundation pit, 17. grouting foundation. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0028] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] The specific implementation scheme of the present invention is as follows: As Figure 1 and Figure 2As shown in the figure, a heat-insulating rail scale for weighing molten iron includes a weighing platform 1, a support platform 2, and a foundation wall 3. The weighing platform 1 is connected in a weighing pit 16 through weighing sensors 15. Support platforms 2 are respectively arranged on both sides of the weighing platform 1, and the support platforms 2 are fixed on a grouting foundation 17. Foundation walls 3 are respectively arranged at both ends of the weighing platform 1, and the foundation walls 3 are the inner walls of the weighing pit 16. The weighing platform 1 is in soft-sealed connection with the support platforms 2 and the foundation walls 3, which not only prevents molten iron from flowing into the weighing pit 16 and reducing the weighing accuracy, but also conducts effective soft connection, meets the requirement of the independence of the weighing of the weighing platform 1, and ensures the weighing accuracy; heat-insulating layers 4 and heat-resistant layers 5 are arranged on both the weighing platform 1 and the support platforms 2, which prevent damage to the weighing and metering system caused by the direct contact between the splashing and leaking molten iron and the weighing platform 1 and its surrounding components, extends the service life of this rail scale, and moreover, a plurality of dividing components 6 are evenly distributed in the heat-insulating layer 4, and the plurality of dividing components 6 form a load-bearing platform for carrying the heat-resistant layer 5. The dividing component 6 not only plays the role of carrying the heat-resistant layer 5, improves the strength and stability of the overall structure, but also forms a flat surface of the load-bearing platform, makes the surface of the heat-resistant layer 5 smoother, and further ensures the reliable, accurate, and stable operation of the weighing and metering system.

[0030] Specifically, as Figure 1 shown, there is a weighing gap 7 formed by a certain distance between the weighing platform 1 and the support platforms 2 and the foundation walls 3. A sealed isolation component 8 is arranged in the weighing gap 7, and the sealed isolation component 8 is in soft connection with the weighing platform 1. The sealed isolation component 8 includes an arc-shaped steel belt 81 and an asbestos isolation layer 82 filled inside it. One side of the arc-shaped steel belt 81 is in contact with the weighing platform 1, and the other side of the arc-shaped steel belt 81 is rigidly connected to the support platforms 2 and the foundation walls 3. That is, when the arc-shaped steel belt 81 is connected to the support platform 2, one side of the arc-shaped steel belt 81 is fixed to the lower end of the support platform 2 by welding or threaded connection. When the arc-shaped steel belt 81 is connected to the foundation wall 3, one side of the arc-shaped steel belt 81 is fixed to the steel plate embedded in the foundation wall 3 by welding or threaded connection.

[0031] Specifically, as Figure 1 shown, the heat-insulating layer 4 is set as an asbestos layer, filled with asbestos, which plays a role in heat insulation, prevents the heat of the splashing or leaking molten iron from being conducted to the weighing platform 1 and causing damage to the weighing platform 1. The heat-resistant layer 5 is formed by laying refractory bricks 51 on the dividing components 6. Dividing components 6 are respectively arranged at both ends of the refractory bricks 51, making the laying of the refractory bricks 51 more stable.

[0032] As Figure 3 and Figure 4As shown, the dividing component 6 includes a support platform 61, a vertical partition plate 62, a support foot 63 and a fixing screw 64 connected together by welding. A vertical partition plate 62 is arranged in the middle of the upper end of the support platform 61. The vertical partition plate 62 is the same width as the support platform 61. Refractory bricks 51 are carried between adjacent vertical partition plates 62 and the support platform 61. Moreover, the length of the support platform 61 is less than the width of the refractory brick 51, so as to reserve space for the thermal expansion of the refractory brick 51. The height of the vertical partition plate 62 is less than the thickness of the refractory brick 51 by 15 mm to 20 mm, so that a gap is formed between adjacent refractory bricks 51 after contact. The refractory mud layer 9 is filled in the gap, which plays a role in leveling and reinforcing the heat-resistant layer 5. In order to further improve the overall heat resistance and fire resistance, and to The thermal layer 5 is further protected, and a quartz sand layer 10 is laid on the upper end of the heat-resistant layer 5, and the thickness of the quartz sand layer 10 is 40㎜~50㎜; support feet 63 are respectively arranged on both sides of the lower end of the support platform 61. In order to make the support more stable, two support feet 63 can be arranged on one side of the support platform 61, and the support feet 63 pass through the thermal insulation layer 4 and contact the weighing platform 1, which plays a role of support and reinforcement. The height of the support feet 63 is 3㎜~5㎜ less than the thickness of the thermal insulation layer 4. When the support feet 63 collide with the weighing platform 1, the thermal insulation layer 4 made of asbestos can be compacted firmly; a fixing screw 64 is arranged in the middle of the lower end of the support platform 61, and the fixing screw 64 passes through the thermal insulation layer 4 and the weighing platform 1 in turn and is fastened by a nut, thereby realizing the tight positioning of the dividing component 6 and facilitating the repair and replacement of the damaged dividing component 6.

[0033] Specifically, Figure 1 As shown, the weighing platform 1 includes a load-bearing panel Ⅰ11, a support frame Ⅰ12 and a weighing body 13 fixedly connected from top to bottom. Rails 14 are arranged on both sides of the load-bearing panel Ⅰ11. The rails 14 slide with the rollers of the molten iron tank car to guide the molten iron tank car. The weighing body 13 is connected to the weighing pit 16 through a weighing sensor 15. When the molten iron tank car loaded with molten iron runs onto the weighing body 13, the weighing body 13 is pressed downward, thereby pressing the weighing sensor 15 downward, and the weighing sensor 15 receives the weight. The force signal is transmitted to the control system of the weighing and metering system to calculate the weight of the molten iron. The support platform 2 includes a load-bearing panel Ⅱ21 and a support frame Ⅱ22 which are fixedly connected. The support frame Ⅱ22 is fixed on the pouring foundation 17. The support frame Ⅰ12 and the support frame Ⅱ22 are both welded by staggered transverse channel steels and longitudinal channel steels, which play the role of rigid support and rigid connection. The strength of the support frame Ⅰ12 must be sufficient to support the load-bearing panel Ⅰ11, the molten iron tank car and splashing and leaking molten iron.

[0034] The method for laying the above-mentioned insulated rail scale for weighing molten iron comprises the following steps:

[0035] 1) Install the sealing and isolating component 8: Place the arc-shaped steel strip 81 in the weighing gap 7, fix one side of the arc-shaped steel strip 81 to the bottom of the support platform 2 and the foundation wall 3, make the other side of the arc-shaped steel strip 81 contact the outer edge of the weighing platform 1 relatively, and fill the asbestos isolation layer 82 on the upper surface of the arc-shaped steel strip 81 and make it fill the weighing gap 7;

[0036] 2) Lay the heat insulation layer 4 and the dividing component 6: Plan the laying pattern of the dividing component 6 on the weighing platform 1 and the support platform 2 respectively, drill holes on the weighing platform 1 according to the distance between the fixing screws 64 at the lower end of the dividing component 6, then lay the heat insulation layer 4 on the weighing platform 1 and the support platform 2 respectively, insert the fixing screws 64 of multiple dividing components 6 into the corresponding holes on the weighing platform 1, and use nuts to pre-tighten the fixing screws 64 to make the support feet 63 of the dividing component 6 contact the surface of the weighing platform 1;

[0037] 3) Lay the heat-resistant layer 5: Embed each refractory brick 51 between the vertical partition plates 62 and the support platform 61 adjacent to the dividing component 6. After the overall laying and adjustment, tighten the nuts on the fixing screws 64 to firmly fix the dividing component 6 on the weighing platform 1, and at the same time make the support platform 61 compact the heat insulation layer 4;

[0038] 4) Filling and trimming the surface of the heat-resistant layer 5: Fill the refractory mud layer 9 in the gaps between the adjacent refractory bricks 51 laid, and fill other gaps with asbestos. After the refractory mud layer 9 dries, lay a quartz sand layer 10 with a thickness of 40 mm to 50 mm on the surface of the refractory mud layer 9.

[0039] In summary, the overall structure of this hot metal weighing heat-insulating rail scale is stable, high-temperature resistant, and has a long service life. It prevents hot metal from splashing into the gaps around the weighing platform, and in the case of hot metal heat radiation and a small amount of leakage, it will not cause damage to the rail scale, ensuring the reliable, accurate, and stable operation of the weighing and metering system.

[0040] As described above, only some principles of the present invention are illustrated by diagrams. This specification is not intended to limit the present invention to the specific structures and application scopes shown and described. Therefore, all possible corresponding modifications and equivalents that can be utilized belong to the scope of the patent applied for by the present invention.

Claims

1. A laying method for a heat-insulating rail scale for weighing molten iron, characterized in that: The heat-insulating rail scale for weighing molten iron includes a weighing platform (1), a support platform (2) and a foundation wall (3). The support platforms (2) are respectively arranged on both sides of the weighing platform (1), and the foundation walls (3) are respectively arranged at both ends of the weighing platform (1). The weighing platform (1) is connected to the support platform (2) and the foundation wall (3) by a sealed flexible connection; heat-insulating layers (4) and heat-resistant layers (5) are arranged on both the weighing platform (1) and the support platform (2). A plurality of dividing components (6) are evenly distributed in the heat-insulating layer (4), and the plurality of dividing components (6) form a load-bearing platform for carrying the heat-resistant layer (5); A weighing gap (7) is formed at a distance between the weighing platform (1) and the support platform (2) and the foundation wall (3). A sealed isolation component (8) is arranged in the weighing gap (7), and the sealed isolation component (8) is flexibly connected to the weighing platform (1); The sealed isolation component (8) includes an arc-shaped steel belt (81) and an asbestos isolation layer (82) filled therein. One side of the arc-shaped steel belt (81) is in contact with the weighing platform (1), and the other side of the arc-shaped steel belt (81) is rigidly connected to the support platform (2) and the foundation wall (3); The heat-insulating layer (4) is set as an asbestos layer, and the heat-resistant layer (5) is formed by laying refractory bricks (51) on the dividing components (6). The dividing components (6) are respectively arranged at both ends of the refractory brick (51); The dividing component (6) includes a support table (61), a vertical partition board (62), support feet (63) and fixing screws (64). The vertical partition board (62) is arranged in the middle of the upper end of the support table (61), and the refractory brick (51) is carried between the adjacent vertical partition board (62) and the support table (61); The support feet (63) are respectively arranged on both sides of the lower end of the support table (61), and the support feet (63) pass through the heat-insulating layer (4) and are in contact with the weighing platform (1); The fixing screw (64) is arranged in the middle of the lower end of the support table (61), and the fixing screw (64) passes through the heat-insulating layer (4) and the weighing platform (1) in sequence and is fastened by a nut; The laying method includes the following steps: 1) Install the sealed isolation component (8): Place the arc-shaped steel belt (81) in the weighing gap (7), fix one side of the arc-shaped steel belt (81) on the bottom of the support platform (2) and the foundation wall (3), make the other side of the arc-shaped steel belt (81) contact the outer edge of the weighing platform (1), and fill the asbestos isolation layer (82) on the upper surface of the arc-shaped steel belt (81) to make it fill the weighing gap (7); 2) Laying the heat insulation layer (4) and the dividing components (6): Plan the laying pattern of the dividing components (6) on the weighing platform (1) and the support platform (2) respectively. Drill holes on the weighing platform (1) according to the spacing between the fixing screws (64) at the lower end of the dividing components (6). Then lay the heat insulation layer (4) on the weighing platform (1) and the support platform (2) respectively. Insert the fixing screws (64) of multiple dividing components (6) into the corresponding holes on the weighing platform (1), and use nuts to pre-tighten the fixing screws (64) so that the support feet (63) of the dividing components (6) are in contact with the surface of the weighing platform (1); 3) Laying the heat-resistant layer (5): Insert each refractory brick (51) between the vertical partition plates (62) and the support platforms (61) adjacent to the dividing components (6). After the overall laying and adjustment, tighten the nuts on the fixing screws (64) to firmly position the dividing components (6) on the weighing platform (1), and at the same time, use the support platforms (61) to compact the heat insulation layer (4); 4) Filling and finishing the surface of the heat-resistant layer (5): Fill the gaps between the adjacent laid refractory bricks (51) with refractory mud layers (9), and fill other gaps with asbestos. After the refractory mud layers (9) are dried, lay a quartz sand layer (10) with a thickness of 40 mm to 50 mm on the surface of the heat-resistant layer (5).

2. The laying method of the heat-insulated rail scale for molten iron weighing according to claim 1, characterized in that: The arc-shaped steel strip (81) is fixedly connected to the support platform (2) and the foundation wall (3) by welding or threaded connection.

3. The laying method of the heat-insulated rail scale for molten iron weighing according to claim 1, characterized in that: The height of the vertical partition plate (62) is 15 mm to 20 mm less than the thickness of the refractory brick (51). The gaps between adjacent refractory bricks (51) are filled with refractory mud layers (9). A quartz sand layer (10) is laid on the upper end of the heat-resistant layer (5), and the thickness of the quartz sand layer (10) is 40 mm to 50 mm.

4. The laying method of the heat-insulated rail scale for molten iron weighing according to claim 1, characterized in that: The weighing platform (1) includes a load-bearing panel I (11), a support frame I (12) and a weighing body (13) fixedly connected from top to bottom. Rails (14) are arranged on both sides of the load-bearing panel I (11). The weighing body (13) is connected in a weighing pit (16) through a weighing sensor (15). The support platform (2) includes a load-bearing panel II (21) and a support frame II (22) fixedly connected. The support frame II (22) is fixed on the grouting foundation (17). Both the support frame I (12) and the support frame II (22) are formed by cross-welding of transverse channel steels and longitudinal channel steels.

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