Double-layer water-cooled anti-sticking slide plate for a casting machine

Abstract

The utility model discloses a double -deck water -cooling anti -sticking slide for cast -iron machine, including slide body, the slide body is enclosed by the slide outer wall and slide inner wall of opposite arrangement and forms the closed inner chamber, the inner chamber is equipped with water inlet pipe and water outlet pipe, and cooling water is continuously flowed into from water inlet pipe, flows through the inner chamber and then flows out from water outlet pipe, makes the surface temperature of slide inner wall when receiving molten iron always below the freezing point of molten iron, thereby prevents molten iron and steel plate fusion and the generation of iron tumor. The utility model relates to cast -iron machine molten iron casting safety protection technical field, and specifically speaking, it is related to a double -deck water -cooling anti -sticking slide that can continuously water -cool and prevent molten iron adhesion and the generation of iron tumor.

Description

Technical Field

[0001] This utility model relates to the field of safety protection technology for molten iron casting in iron casting machines. Specifically, it relates to a double-layer water-cooled anti-sticking slide plate that can continuously cool molten iron and prevent molten iron adhesion and iron nodule formation. Background Technology

[0002] Casting machines are core equipment in foundry enterprises for continuously casting molten iron from blast furnaces into finished products. During the casting process, molten iron is injected into a circulating mold through a sluice. Due to factors such as fluctuations in mold volume, changes in casting speed, and molten iron splashing, some molten iron overflows from the mold opening. To prevent the overflowing molten iron from falling directly to the ground or adhering to the guide rail, existing technology generally suspends a 10-20 mm thick single-piece steel plate below the sluice as a receiving slide (hereinafter referred to as "existing slide"). Although this slide can temporarily catch the molten iron, because the temperature of the molten iron is as high as about 1450 ℃, fusion occurs the instant the high-temperature molten iron comes into contact with the surface of the steel plate, and the iron and the steel plate surface become integrated and accumulate layer by layer. With the increase of casting batches, the accumulation rapidly grows into a large "iron nodule" weighing hundreds of kilograms. The presence of the iron nodule not only changes the original profile of the slide, preventing subsequent molten iron from sliding smoothly, but also blocks the receiving hopper below, forcing the casting machine to stop for maintenance.

[0003] The original sliding plate lacked any cooling measures, causing the surface temperature to rise continuously over time, further accelerating the welding and lumps formation. To remove the lumps, workers had to manually chisel them with steel chisels, which was labor-intensive, inefficient, and often impossible to completely remove due to the dense and hard nature of the lumps. As a last resort, the common practice on-site was to use a "water-cooling" method to cause the lumps to shrink and burst before cleaning: cold water was sprayed directly onto the red-hot sliding plate, using the thermal stress to cause the lumps to crack and fall off. While this method reduced the cleaning difficulty to some extent, it introduced a series of new safety hazards: 1. Large amounts of cooling water entered the casting machine pit, causing the pit to become damp and waterlogged; contact between water and high-temperature molten iron could easily cause splashing or even steam explosions. 2. In winter, water accumulates and freezes, significantly increasing the risk of people slipping and falling. 3. Repeated hot and cold cycles cause severe thermal fatigue cracks in single steel plates, with an average service life of less than 7 days, requiring frequent replacement, which increases spare parts costs and reduces the operating rate of the cast iron machine. 4. The steam generated by water spraying fills the site, affecting visibility, worsening the working environment, and accelerating the corrosion of surrounding steel structures.

[0004] In summary, the existing single-piece steel plate slide has created a vicious cycle of "welded iron adhesion—iron nodule accumulation—water cooling—safety hazards," becoming a bottleneck restricting the safe, stable, and efficient operation of casting machines. Therefore, developing a new type of slide that can continuously reduce the surface temperature of the slide, fundamentally prevent iron-steel fusion, eliminate the need for water cooling, extend its service life, and reduce the labor intensity of workers is a pressing technical challenge in this field. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a double-layer water-cooled anti-sticking slide plate for iron casting machines, which makes molten iron casting safer.

[0006] This utility model achieves its purpose through the following technical solution: The water-cooled slide plate of the cast iron machine includes a slide plate body. The slide plate body is formed by the outer wall and inner wall of the slide plate arranged opposite to each other to form a closed inner cavity. The inner cavity is equipped with an inlet pipe and an outlet pipe. Cooling water flows continuously into the inner cavity from the inlet pipe and flows out from the outlet pipe, so that the surface temperature of the inner wall of the slide plate is always lower than the solidification point of the molten iron when receiving molten iron, thereby preventing the molten iron from fusing with the steel plate and preventing the formation of iron nodules.

[0007] As a further limitation of this technical solution, the skateboard body is rectangular in shape, and the outer wall and inner wall of the skateboard are welded together by sealing plates around the perimeter. The net distance between the inner cavities is 3 to 5 cm, forming a liquid flow cooling channel.

[0008] As a further limitation of this technical solution, the water inlet pipe is located at the lower end of the side of the slide body, and the water outlet pipe is located at the upper end of the side of the slide body. The two are arranged diagonally in the horizontal direction so that the cooling water rises evenly along the entire length of the slide body and completely fills the inner cavity.

[0009] As a further limitation of this technical solution, the working surface of the inner wall of the slide plate is provided with a heat-resistant and oxidation-resistant alloy layer with a thickness of 1 to 3 mm, which further reduces the high-temperature erosion rate.

[0010] As a further limitation of this technical solution, the longitudinal cross-section of the slide body is arc-shaped to increase the contact time of molten iron and guide the molten iron to fall smoothly into the iron receiving hopper below.

[0011] As a further limitation of this technical solution, both the inlet and outlet water pipes are equipped with quick-connect couplings to enable the overall quick disassembly and online replacement of the slide plate.

[0012] As a further limitation of this technical solution, the inner cavity is provided with some interference flow ribs or spiral guide vanes to improve the turbulence of cooling water and reduce the heat load on the wall.

[0013] As a further limitation of this technical solution, the slide body is detachably installed below the chute of the casting iron machine head through a suspension lug or slide rail structure, and the installation angle is 5° to 15° to ensure the self-flow of molten iron and the natural circulation of cooling water.

[0014] As a further limitation of this technical solution, the inner wall and outer wall of the skateboard are made of low alloy heat-resistant steel plate with a thickness of 8 to 12 mm, and there are reinforcing ribs between them to ensure that the 3 to 5 cm cavity does not deform or leak under high temperature and heavy load.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are: Continuous water cooling eliminates fusion welding: The flowing cooling water in the 3-5 cm cavity keeps the temperature of the inner wall of the slide plate firmly below 1000 ℃, which is far below the critical temperature at which molten iron and steel plate fusion welding occurs. This fundamentally eliminates the conditions for iron nodule formation, achieves "zero iron sticking", and completely eliminates the need for manual chiseling and water cooling.

[0016] Intrinsic safety improvements to the environment: After eliminating the need for water injection, the pit no longer accumulates water or freezes, eliminating major safety hazards such as molten iron splashing when it comes into contact with water, steam explosions, and personnel slipping and falling; at the same time, it reduces water vapor emissions by more than 80%, improves on-site visibility, reduces the corrosion rate of steel structures, and significantly improves the working environment.

[0017] Long life, high efficiency, cost reduction and consumption reduction: Double-layer steel plate + continuous cooling + optional heat-resistant alloy layer extend the average life of the slide plate and drastically reduce the consumption of spare parts and the frequency of downtime for replacement; quick-change joint design completes online replacement within 10 minutes, improves the operating rate of cast iron machines, reduces the labor intensity of workers, and achieves a virtuous cycle of safety, stability, high efficiency and low consumption. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention.

[0019] Figure 2 This is a side view of the present invention.

[0020] Figure 3 This is a top view of the present invention.

[0021] Figure 4 This utility model Figure 3 Sectional view of AA.

[0022] In the diagram: 1. Skateboard body, 2. Water outlet pipe, 3. Water supply pipe, 4. Inner cavity, 11. Skateboard outer wall, 12. Skateboard inner wall. Detailed Implementation

[0023] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0026] The following description of exemplary embodiments refers to the accompanying drawings. The same reference numerals in different figures denote the same or similar elements. The following detailed description does not limit the present invention. Rather, the scope of the present invention is defined by the appended claims. For simplicity, the following embodiments describe the terminology and structure of the system; however, the embodiments described below are not limited to this system but can be applied to any other applicable system.

[0027] like Figures 1-4 As shown, this utility model includes a double-layer water-cooled anti-sticking slide plate for a cast iron machine. The feature is that it includes a slide plate body 1, which is formed by the outer wall 11 and the inner wall 12 of the slide plate arranged opposite to each other to form a closed inner cavity 4. The inner cavity 4 is provided with a water inlet pipe 3 and a water outlet pipe 2. Cooling water flows continuously into the inner cavity 4 through the water inlet pipe 3 and then flows out through the water outlet pipe 2, so that the surface temperature of the inner wall 12 of the slide plate is always lower than the solidification point of the molten iron when receiving molten iron, thereby preventing the molten iron from fusing with the steel plate and preventing the formation of iron nodules.

[0028] The skateboard body 1 is rectangular in shape. The outer wall 11 and the inner wall 12 of the skateboard are welded together by sealing plates around the perimeter. The net distance between the inner cavities 4 is 3 to 5 cm, forming a liquid flow cooling channel.

[0029] In Example 1, the slide body 1 is an integral welded cuboid structure. The length L is designed according to the series of cast iron machine mold widths (commonly 800 mm, 1200 mm, and 1600 mm). The width W is kept at 400 mm, and the total height H is controlled within 100 mm to ensure smooth assembly and disassembly within the existing 150 mm installation space below the nozzle. The outer wall 11 and inner wall 12 of the slide are made from a single sheet of steel. After laser cutting and bending, they are joined at a 45° bevel on all four sides, with double-sided fillet welds. The weld leg height is 8 mm, and the weld is 100% PT tested to ensure no leakage after a 0.3 MPa water pressure test for 30 minutes, forming a completely sealed inner cavity 4. The water inlet pipe 3 is located at the lower end of the side of the slide body 1, and the water outlet pipe 2 is located at the upper end of the side of the slide body 1. The two are arranged diagonally in the horizontal direction so that the cooling water rises evenly along the entire length of the slide body and completely fills the inner cavity 4.

[0030] In another embodiment, both the inlet pipe 3 and the outlet pipe 2 are made of 06Cr19Ni10 seamless stainless steel pipe (Φ25 mm × 3 mm) conforming to GB / T 14976 standard, and are welded to the end plates of both ends of the slide plate, arranged diagonally in the horizontal direction: the inlet pipe 3 is located on the right side of the lower end, and the outlet pipe 2 is located on the left side of the upper end, with the horizontal projection angle between their center lines being 175°. This layout can make full use of the installation tilt angle of 5° to 15° to form a forced upward flow of "low inlet and high outlet", eliminate top air lock, and ensure that the cooling water flows through the entire pipe.

[0031] The working surface of the inner wall 12 of the slide plate is provided with a heat-resistant and oxidation-resistant alloy layer with a thickness of 1 to 3 mm, which further reduces the high-temperature erosion rate.

[0032] As another embodiment, the working surface (i.e. the surface in contact with molten iron) of the inner wall 12 of the slide plate is clad with a 1-3 mm thick Fe-25Cr-15Ni-2Mo-0.3Y heat-resistant and oxidation-resistant alloy layer by plasma cladding process before assembly welding. The cladding current is 180 A, and the stress is relieved by holding at 250 ℃ for 2 h after welding.

[0033] The longitudinal cross-section of the slide body 1 is arc-shaped to increase the contact time of molten iron and guide the molten iron to fall smoothly into the iron receiving bucket below.

[0034] In another embodiment, the longitudinal cross-section of the slide body 1 is designed as an arc with a radius of R1500 mm (or it can be serialized as R2000 mm or R2500 mm), and the arc depth is 15 mm. The starting point of the arc segment is located 100 mm in front of the molten iron drop point, and the ending point extends to the top of the receiving hopper, forming a "spoon-shaped" slide: after the molten iron impacts, it climbs along the arc surface, converting kinetic energy into potential energy, extending the contact time by 0.3 to 0.5 s, which not only enhances the cooling effect, but also uses the acceleration due to gravity to cause the solidified shell to break at the top of the arc.

[0035] Both the inlet pipe 3 and the outlet pipe 2 are equipped with quick-change connectors, enabling the slide plate to be quickly disassembled and replaced online.

[0036] The inner cavity 4 is equipped with minor flow ribs or spiral guide vanes to improve the turbulence of cooling water and reduce the heat load on the wall.

[0037] In another embodiment, the inner cavity 4 is provided with a trapezoidal rib 5 mm high and 30 mm long every 150 mm along the length direction, which are arranged in an alternating manner to form a three-dimensional spiral flow channel.

[0038] The slide body 1 is detachably installed below the chute of the casting iron machine head via a suspension lug or slide rail structure, and the installation angle is 5° to 15° to ensure the self-flow of molten iron and the natural circulation of cooling water.

[0039] The inner wall 12 and the outer wall 11 of the skateboard are made of low-alloy heat-resistant steel plate with a thickness of 8 to 12 mm. Reinforcing ribs are provided between the two to ensure that the 3 to 5 cm cavity does not deform or leak under high temperature and heavy load.

[0040] In another embodiment, both the inner wall 12 and the outer wall 11 of the sliding plate are made of 10 mm thick Q345R low alloy heat-resistant steel plate with a yield strength ≥ 345 MPa and a strength retention rate of 85% at 400 ℃. An 8 mm thick and 40 mm high "ω" shaped reinforcing rib is arranged every 200 mm between the two walls. The rib is continuously welded to the inner and outer walls on both sides to form a box-type reinforcing structure.

[0041] Throughout this specification, the terms "an embodiment" or "an embodiment" mean that a specific feature, structure, or characteristic in connection with an embodiment is included in at least one embodiment of the disclosed subject matter. Therefore, the use of the terms "in one embodiment" or "in an embodiment" throughout this specification does not necessarily refer to the same embodiment. Furthermore, any suitable manner may be adopted to incorporate specific features, structures, or characteristics in one or more embodiments. It should be understood that this specification is not intended to limit the present invention. Rather, exemplary embodiments are intended to cover alternatives, modifications, and equivalents that are included within the spirit and scope of the present invention as defined by the appended claims. Furthermore, numerous specific details are set forth in the detailed description of exemplary embodiments to provide a comprehensive understanding of the claimed invention. However, those skilled in the art will understand that various embodiments may also be practiced without these specific details.

Claims

1. A double-layer water-cooled anti-stick sliding plate for a cast iron machine, characterized in that: The slide body (1) is formed by the outer wall (11) and inner wall (12) of the slide body (1) arranged opposite to each other to form a closed inner cavity (4). The inner cavity (4) is provided with an inlet pipe (3) and an outlet pipe (2). Cooling water flows continuously into the inner cavity (4) from the inlet pipe (3) and then flows out from the outlet pipe (2), so that the surface temperature of the inner wall (12) of the slide body is always lower than the solidification point of the molten iron when receiving molten iron, thereby preventing the molten iron from fusing with the steel plate and the formation of iron nodules.

2. The double-layer water-cooled anti-stick sliding plate according to claim 1, characterized in that: The skateboard body (1) is rectangular in shape. The outer wall (11) and inner wall (12) of the skateboard are welded together by sealing plates around the perimeter. The net distance between the inner cavity (4) is 3 to 5 cm, forming a liquid flow cooling channel.

3. The double-layer water-cooled anti-stick sliding plate according to claim 2, characterized in that: The inlet pipe (3) is located at the lower end of the side of the slide body (1), and the outlet pipe (2) is located at the upper end of the side of the slide body (1). The two are arranged diagonally in the horizontal direction so that the cooling water rises evenly along the entire length of the slide body and completely fills the inner cavity (4).

4. The double-layer water-cooled anti-stick sliding plate according to any one of claims 1 to 3, characterized in that: The working surface of the inner wall (12) of the slide plate is provided with a heat-resistant and oxidation-resistant alloy layer with a thickness of 1 to 3 mm, which further reduces the high-temperature erosion rate.

5. The double-layer water-cooled anti-stick sliding plate according to any one of claims 1 to 3, characterized in that: The longitudinal cross-section of the slide body (1) is arc-shaped to increase the contact time of molten iron and guide the molten iron to fall into the iron receiving bucket below.

6. The double-layer water-cooled anti-stick sliding plate according to any one of claims 1 to 3, characterized in that: Both the inlet pipe (3) and the outlet pipe (2) are equipped with quick-connect fittings to enable the slide plate to be quickly disassembled and replaced online.

7. The double-layer water-cooled anti-stick sliding plate according to any one of claims 1 to 3, characterized in that: The inner cavity (4) is provided with minor interference flow ribs or spiral guide vanes to improve the turbulence of cooling water and reduce the heat load on the wall.

8. The double-layer water-cooled anti-stick sliding plate according to any one of claims 1 to 3, characterized in that: The slide body (1) is detachably installed below the chute of the cast iron machine head through a suspension lug or slide rail structure, and the installation angle is 5° to 15° to ensure the self-flow of molten iron and the natural circulation of cooling water.

9. The double-layer water-cooled anti-stick sliding plate according to any one of claims 1 to 3, characterized in that: The inner wall (12) and outer wall (11) of the skateboard are made of low alloy heat-resistant steel plate with a thickness of 8-12 mm. Reinforcing ribs are provided between them to ensure that the 3-5 cm cavity does not deform or leak under high temperature and heavy load.

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