Manufacturing device for double-liquid composite casting of large wear-resistant lining plate

Abstract

The utility model discloses a manufacturing device for a double-liquid composite casting large wear-resisting lining plate. The manufacturing device comprises a ground fixing support with a guide rail arranged on the upper surface. The cylindrical sand box is arranged on the ground fixing support, a vertical parting evanescent mode model is arranged in the cylindrical sand box, and a metal partition plate is vertically arranged in the middle of the cylindrical sand box; the movable bracket is arranged on the guide rail and can be close to or far away from the cylindrical sand box under the action of the driving mechanism; the medium-frequency induction heater is arranged on the movable support and comprises a coil support, a heating coil and a connecting plate, and the support is in a cylinder shape with an upper opening and a lower opening; the heating coil is insulated from the coil bracket and is arranged in the coil bracket along the side wall of the coil bracket; the connecting plate is arranged on the side, close to the movable support, of the coil support, the projection of the connecting plate and the projection of the movable support on the horizontal plane partially coincide, a first fixing hole is correspondingly formed in the coincident position, a first lead screw penetrates through the hole, and the first motor is connected with the lead screw, so that the first motor can rotate to drive the medium-frequency induction heater to move up and down.

Description

Technical Field

[0001] This utility model relates to the field of casting equipment technology, and in particular to a manufacturing device for a large wear-resistant liner plate made by dual-liquid composite casting. Background Technology

[0002] Large ball mills, as crucial equipment for grinding materials, are widely used in various industrial sectors requiring large-scale continuous production, such as mining, metallurgy, environmental protection and resource recycling, cement and building materials, and other fields. Ball mill liners can be categorized by their placement in different areas: cylinder liners, grinding head liners, and grinding door liners, etc., serving to protect the cylinder, disperse the grinding media and materials, and improve grinding efficiency. They can also be classified by material: metal-based liners, rubber liners, stone or cast stone liners, and composite material liners, etc.

[0003] Currently, most ball mill liners are made of metal-based materials, with a small number made of non-metallic materials. Due to the different motion states of the grinding media in each chamber, the materials used for the liners vary to meet the requirements of this working condition. In the grinding chamber, the grinding media primarily exert impact, requiring the liners to have impact resistance and wear resistance. High manganese steel (ZGMn13) is commonly used as the liner material. It has a certain degree of impact toughness, and when subjected to a certain impact, its surface undergoes cold work hardening, becoming hard and wear-resistant. Its hardness is generally between HB300-350, and its toughness is quite high, with an impact value reaching 700 Nm / cm. 2However, during use, it is prone to premature convex bending deformation, which can break the fixing bolts and cause the liner to fall off, reducing its service life. The average service life is generally 5000-6000 hours. High-chromium cast iron has high hardness and good wear resistance, ranking first among wear-resistant materials. High-chromium cast iron is a brittle material, but with proper treatment, it can be used to make coarse grinding chamber liners. High-chromium cast iron is used in conditions with relatively small impacts, such as coal mill liners and crusher liners (wear-resistant plates). Its wear resistance is 6-8 times higher than that of high-manganese steel, resulting in significant economic benefits. High-chromium cast iron is unsuitable for complex structures and large, thin-walled components in mills, such as diaphragm grates and mill head liners. Currently, various grades of high-chromium cast iron have been developed and are widely used in the cement industry. To improve the toughness of wear-resistant materials, high-chromium cast steel and other materials have emerged. Other wear-resistant materials available include low-chromium cast iron, 42SiMnCrMoMo steel, low-carbon SiMn wear-resistant alloy steel, and low-alloy high-strength steel (ZG35SiMn and ZG30CrMnSiMoRe). In the fine grinding chamber, the grinding media primarily perform grinding, so the liners require excellent wear resistance. Wear-resistant white cast iron, chilled cast iron, and medium-manganese rare earth ductile iron are suitable choices. Compared to high-manganese steel liners, rubber liners have the following advantages: lighter weight, reducing labor intensity during installation and shortening maintenance time; lighter load, resulting in lower power consumption (generally around 10%); longer service life, improving mill operating rate; reduced grinding media consumption by over 20%; protection of the cylinder from slurry abrasion, extending cylinder life; and lower industrial noise, improving operating conditions and benefiting worker health. Its disadvantages are: poor high-temperature resistance; unsuitable for dry mills; and insufficient impact resistance in the head chamber of wet ball mills. Another type of liner uses diabase cast stone, which some cement plants have used in the final chamber of mills. Industrial trials have shown that it is perfectly suitable for use in forged steel chambers of tube mills, with a service life more than twice that of self-cast white cast iron liners, while the cost is more than half that of white cast iron. However, the installation technique of cast stone liners and the casting quality of the cast stone itself require further research and improvement.

[0004] Currently, large ball mill liners still primarily use single wear-resistant materials, such as high-manganese steel or various alloy steels. Some bimetallic composite liners are used in small ball mills. However, high-manganese steel is becoming increasingly rare in practical applications due to its low strength and susceptibility to rheological changes. Traditional alloy steel liners, lacking sufficient toughness, struggle to achieve an effective balance between wear resistance and impact resistance. While bimetallic composite liners improve performance through the combination of dissimilar materials, they are limited by inherent defects in the casting process (such as poor bonding layer stability and easy interface cracking). Currently, it is impossible to manufacture large, stable bimetallic composite cast large wear-resistant liners for large ball mills. During the cooling process, large castings, due to their large volume and slow cooling rate, are prone to generating significant thermal stress. The different shrinkage rates of the two metals can lead to large residual stress at the interface, potentially causing cracking. Smaller castings, on the other hand, cool faster, resulting in less residual stress and a more stable bonding layer. Therefore, there is an urgent need to design a device for manufacturing bimetallic composite cast large wear-resistant liners.

[0005] The above background information is provided only to aid in understanding the concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0006] The purpose of this invention is to provide a manufacturing device for a large wear-resistant liner plate made by a two-liquid composite casting, so as to solve the technical problems of poor bonding layer stability and easy interface cracking of wear-resistant liners for large ball mills in the prior art.

[0007] Therefore, this utility model proposes a manufacturing device for a large wear-resistant liner plate made by dual-liquid composite casting, including a ground fixed support, the upper surface of which is provided with several guide rails.

[0008] A cylindrical sand box is installed on the ground fixed support. A vertically parted lost foam model is installed inside the cylindrical sand box. A metal partition is vertically installed in the middle of the lost foam model. Molten alloy steel and high-chromium cast iron liquid can be injected into the lost foam model cavity from the left and right sides of the metal partition, respectively.

[0009] A movable support is mounted on the guide rail. Under the action of the drive mechanism, the movable support can move closer to or further away from the cylindrical sand box.

[0010] A medium-frequency induction heater, mounted on the movable support, includes a coil support, a heating coil, and a connecting plate. The coil support is a cylindrical shape with openings at the top and bottom. The heating coil is insulated from the coil support and is arranged around the side wall of the coil support. A first space for accommodating the cylindrical sand box is located in the middle of the coil support. The connecting plate is horizontally positioned on the side of the coil support near the movable support. The projections of the connecting plate and the movable support on the horizontal plane partially overlap, and a first fixing hole is provided at the overlapping position. A first lead screw is installed through the first fixing hole, and a first motor is connected to the first lead screw so that the rotation of the first motor can drive the medium-frequency induction heater to move up and down.

[0011] Preferably, the metal partition is made of Q234 steel plate, and it is arranged along the thickness direction of the lost foam pattern, with the distance between it and the mounting surface of the liner plate being one-third of the thickness of the lost foam pattern.

[0012] Preferably, it also includes a vacuum negative pressure device, which includes a vacuum pump, a cooling water circulation device and a control device. Several interconnected negative pressure pipes are arranged along the inner arm and bottom of the cylindrical sand box. The negative pressure pipes are symmetrically distributed, interconnected and concentrated into a main channel. A negative pressure pipe interface connected to the main channel is provided outside the cylindrical sand box, so that the negative pressure pipe interface is connected to the vacuum pump to draw negative pressure into the cylindrical sand box.

[0013] Preferably, the movable support includes a horizontal frame and a vertical frame, which are welded from several steel plates. The horizontal frame and the vertical frame are combined into an "L" shape. The horizontal frame includes a front beam, a rear beam and a left beam. The vertical frame includes an upper beam, a lower beam, a front vertical beam and a rear vertical beam. Two guide rails are provided on the ground fixed support corresponding to the positions of the front beam and the rear beam of the horizontal frame.

[0014] Preferably, two second fixing holes are provided on the upper beam and the connecting plate respectively. The second fixing holes are symmetrically arranged on both sides of the first fixing hole and are in a straight line with the first fixing hole. A light rod is provided in the second fixing hole, the lower end of the light rod is fixed on the connecting plate, and the upper end passes through the second fixing hole of the upper beam.

[0015] Preferably, a linear bearing is provided in the second fixing hole, and the optical rod is disposed in the linear bearing.

[0016] Preferably, a counterweight is provided on the connecting plate at a location away from the intermediate frequency induction heater.

[0017] Preferably, the driving mechanism includes a second motor and a second lead screw. A fixed support beam is provided on the side of the ground fixed bracket away from the cylindrical sand box. The second motor is mounted on the fixed support beam. The second lead screw is horizontally mounted and connected to the second motor via a coupling. The right end of the second lead screw is fixedly mounted on the lower end of the movable bracket.

[0018] Preferably, it also includes a control cabinet for controlling the heating of the medium-frequency induction heater and the movement of the first motor and the second motor.

[0019] Preferably, the medium-frequency induction heater further includes an insulating plate, which is vertically disposed on the inner side wall of the coil support, and the heating coil passes through the insulating plate and is disposed around the coil support.

[0020] The beneficial effects of this invention compared to existing technologies include: This device is used to manufacture large wear-resistant liners using a dual-liquid composite casting process, specifically by casting large wear-resistant liners using two different liquids. A metal partition is installed in the center of the lost foam mold, effectively preventing cross-penetration of the molten metals during pouring and thus avoiding impact on casting quality. A vertical pouring method is used, simultaneously injecting molten alloy steel and high-chromium cast iron from both sides of the metal partition into the lost foam mold cavity. This effectively avoids poor bonding of the bonding layer due to oxidation of the molten metal surface. After pouring, the drive mechanism pushes the medium-frequency induction heater directly above the cylindrical sand box. Under the action of the first motor, the medium-frequency induction heater moves downwards until the height of the heating coil matches the height of the lost foam mold (including the riser portion). Heating then begins and is maintained at the temperature for 3–10 minutes (the exact heating time depends on the size of the liner), ensuring the double-layered molten metal fully melts and bonds with the metal partition. This prevents poor fusion in different areas due to uneven heat distribution, which could lead to unstable bonding layers or even cracking. Attached Figure Description

[0021] Figure 1 This is a first schematic diagram of a specific embodiment of the present utility model.

[0022] Figure 2 This is a second schematic diagram of a specific embodiment of the present invention.

[0023] Figure 3 This is a left view of a specific embodiment of the present utility model.

[0024] Figure 4 This is a first top view of a specific embodiment of the present utility model.

[0025] Figure 5 This is the third schematic diagram of a specific embodiment of the present utility model.

[0026] Figure 6 This is a second top view of a specific embodiment of the present utility model.

[0027] Figure 7 This is an enlarged view of point A in the first schematic diagram of a specific embodiment of this utility model.

[0028] Figure 8 This is a schematic diagram of a cylindrical sand box according to a specific embodiment of this utility model.

[0029] Figure 9 This is a schematic diagram of a lost foam casting model (with metal partitions) according to a specific embodiment of this utility model.

[0030] Figure 10 This is a schematic diagram of a high-frequency induction heater (equipped with a counterweight) in a specific embodiment of this utility model.

[0031] Figure 11 This is a top view of the induction heater (equipped with a counterweight) in a specific embodiment of this utility model.

[0032] Figure 12 This is a schematic diagram of the connection between the guide rail and the ball bearing in a specific embodiment of this utility model.

[0033] Figure 13 This is a schematic diagram of the ground-fixed support in a specific embodiment of this utility model.

[0034] Explanation of reference numerals in the attached drawings: 01-Ground fixed bracket; 011-Boss; 02-Guide rail; 021-Ball bearing; 03-Cylindrical sand box; 31-Negative pressure pipe; 32-Negative pressure pipe interface; 33-Lifting lug; 04-Lost foam casting model; 41-Gating system; 42-Riser; 43-Liner mounting surface; 05-Metal partition; 06-Moving bracket; 61-Horizontal frame; 611-Front beam; 612-Rear beam; 613-Left beam; 62-Vertical frame; 621-Upper beam; 622-Lower beam; 623-Front vertical beam; 624-Rear vertical beam; 6 3-Reinforcing plate; 07-Medium frequency induction heater; 71-Coil bracket; 72-Heating coil; 73-Connecting plate; 731-First fixing hole; 732-Second fixing hole; 74-Insulating plate; 75-First space; 08-First lead screw; 09-First motor; 10-Coupling; 11-Smooth rod; 12-Linear bearing; 13-Counterweight; 14-Second motor; 15-Second lead screw; 16-Fixed bracket beam; 17-Control cabinet; 18-Controller; 19-First limit device; 20-Second limit device; 21-Vacuum pump. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0036] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0037] A manufacturing apparatus for large wear-resistant liners using a two-liquid composite casting method, such as... Figures 1-13 As shown, it includes a ground fixing bracket 01, the upper surface of which is provided with several guide rails 02. In this embodiment, the ground fixing bracket 01 is fixed to a cement floor; a cylindrical sand box 03 is disposed on the ground fixing bracket 01, specifically, as shown... Figure 1 and 13 As shown, the cylindrical sand box 03 is placed at a designated position on the ground fixed support 01, specifically on the protrusion 011 near the right end of the guide rail 02, and can be freely lifted off the ground fixed support 01 according to production needs. The cylindrical sand box 03 contains a vertically parting lost foam model 04. A metal partition 05 is vertically installed in the center of the lost foam model 04, allowing molten alloy steel and high-chromium cast iron to be injected into the lost foam model cavity from both sides of the metal partition 05. The lost foam model 04 is a model for a large wear-resistant liner plate. This model and the casting system are made using special lost foam material (copolymer foam board or copolymer foamed white mold) according to process requirements. A movable support 06 is mounted on the guide rail 02. Under the action of the drive mechanism, the movable support 06 can move closer to or further away from the cylindrical sand box 03. Figure 2 and 12 As shown, the movable support 06 is slidably mounted on the guide rail 02 via ball bearing 021; the medium-frequency induction heater 07, which is mounted on the movable support 06, includes a coil support 71, a heating coil 72, and a connecting plate 73. The coil support 71 is a cylindrical shape with openings at the top and bottom; the heating coil 72 is insulated from the coil support 71 and is arranged around the side wall of the coil support 71. The middle of the surrounding heating coil 72 has a first space 75 for accommodating the cylindrical sand box 03. The heating coil 72 is connected to the control cabinet 17 via a water-cooled cable; the connecting plate 73 is horizontally arranged on the side of the coil support 71 near the movable support 06. The projection of the connecting plate 73 and the movable support 06 on the horizontal plane partially overlaps, and a first fixing hole 731 is provided at the overlapping position. A first lead screw 08 is installed through the first fixing hole 731, and a first motor 09 is connected to the first lead screw 08, so that the rotation of the first motor 09 can drive the medium-frequency induction heater 07 to move up and down.

[0038] The aforementioned device is used to manufacture large wear-resistant liners using a two-liquid composite casting process. This involves casting large wear-resistant liners using two different liquids. A metal partition 05 is installed in the center of the lost foam mold 04 to effectively prevent cross-penetration of the molten metals during pouring, thus avoiding any impact on the casting quality. A vertical pouring method is used, simultaneously injecting molten alloy steel and high-chromium cast iron from both sides of the metal partition 05 into the lost foam mold cavity. This effectively avoids poor bonding of the bonding layer due to oxidation of the molten metal surface. After pouring, a medium-frequency induction heater is activated by the drive mechanism. 07 is pushed directly above the cylindrical sand box 03. Under the action of the first motor 09, the medium frequency induction heater 07 moves downward until the height of the heating coil 72 matches the height of the lost foam model 04 (including the casting system 41 and riser 42 of the lost foam model 04). Then, heating begins and the temperature is maintained for 3 to 10 minutes (the specific heating time depends on the size of the liner). This allows the double-layer molten metal to fully melt and bond with the metal partition 05, avoiding poor fusion in different areas due to uneven heat, which could lead to unstable bonding layers or even cracking.

[0039] Specifically, such as Figure 9 As shown, the metal partition 05 is made of Q234 steel plate and is set along the thickness direction of the lost foam casting model 04. The distance between it and the liner mounting surface 43 (i.e., the non-working surface of the liner) is one-third of the thickness of the lost foam casting model 04. The thickness of the metal partition 05 is selected according to the total weight and thickness of the liner, generally 3 to 8 mm thick. After cutting the metal partition 05 according to the shape of the liner, it needs to be surface polished and rust removed using hydrochloric acid-based agents. Specifically, as... Figure 2 and 8 As shown, it also includes a vacuum negative pressure device, which includes a vacuum pump 21, a cooling water circulation device, and a control device. Several negative pressure pipes 31 are arranged along the inner wall and bottom of the cylindrical sand box 03. These negative pressure pipes 31 are symmetrically distributed, interconnected, and converge into a main channel. A negative pressure pipe interface 32, communicating with the main channel, is provided on the outside of the cylindrical sand box 03, allowing the negative pressure pipe interface 32 to connect to the vacuum pump and thus draw negative pressure into the cylindrical sand box 03. In actual production, the negative pressure is drawn through the control device. To facilitate the hoisting of the cylindrical sand box 03, several lifting lugs 33 can also be provided on the upper part and sides of the cylindrical sand box 03. Figure 1 , 8 As shown in Figure 9, the outer diameter of the cylindrical sand box 03 should be the maximum external dimension d + (200~300) mm of the lost foam model 04, and the height should be the maximum external dimension of the lost foam model 04 (including the height of the gating system 41 and the riser 42) h + (400-600) mm.

[0040] In some examples of this embodiment, such as Figure 1 and 7As shown, the movable support 06 includes a horizontal frame 61 and a vertical frame 62, welded from several steel plates. The horizontal frame 61 and the vertical frame 62 are combined into an "L" shape. The horizontal frame 61 includes a front beam 611, a rear beam 612, and a left beam 613. The vertical frame 62 includes an upper beam 621, a lower beam 622, a front vertical beam 623, and a rear vertical beam 624. Two guide rails 02 are provided on the ground fixed support 01 corresponding to the positions of the front beam 611 and the rear beam 612 of the horizontal frame 61. To improve the overall stability of the movable support 06, several reinforcing plates 63 can be provided between the horizontal frame 61 and the vertical frame 62. In this example, two reinforcing plates 63 are provided. Specifically, to improve the stability and balance of the entire device, the first fixing hole 731 is provided in the middle of the upper beam 621, the first motor 09 is provided on the upper beam 621, and the lower end of the first lead screw 08 is fixed on the connecting plate 73. The first motor 09 drives the intermediate frequency induction heater 07 to move up and down through a worm gear screw structure. When the first motor 09 rotates, the rotational motion of the first motor 09 is transmitted to the first screw 08 through the coupling 10. By controlling the forward and reverse rotation of the first motor 09, the first screw 08 moves up and down, thereby driving the connecting plate 73 to move up and down, and finally driving the intermediate frequency induction heater 07 to move up and down.

[0041] In some examples of this embodiment, such as Figure 1 , 10 As shown in Figure 11, two second fixing holes 732 are correspondingly provided on the upper beam 621 and the connecting plate 73. The second fixing holes 732 are symmetrically arranged on both sides of the first fixing hole 731 and are in a straight line with the first fixing hole 731. A light rod 11 is provided in the second fixing hole 732. The lower end of the light rod 11 is fixed to the connecting plate 73, and the upper end passes through the second fixing hole 732 of the upper beam 621. This structure plays a guiding role, making the medium frequency induction heater 07 move up and down more smoothly. Specifically, as shown in Figure 11... Figure 1 and 7 As shown, a linear bearing 12 can be installed in the second fixing hole 732 at the upper beam 621. The optical rod 11 is installed in the linear bearing 12, which can reduce the friction between the optical rod 11 and the connecting plate 73, improve the smoothness of movement, make the optical rod 11 move up and down more smoothly, and achieve high precision and long service life.

[0042] In some examples of this embodiment, such as Figure 1As shown, in order to increase the overall stability of the device, a counterweight 13 can be set on the connecting plate 73 away from the intermediate frequency induction heater 07. The counterweight 13 is set on the left side of the upper beam 621. The weight of the counterweight 13 can be set according to the weight of the intermediate frequency induction heater 07. The main purpose is to make the intermediate frequency induction heater 07 move up and down more smoothly. The specific weight of the counterweight is not limited.

[0043] In some examples of this embodiment, such as Figure 1 As shown, the driving mechanism includes a second motor 14 and a second lead screw 15. A fixed support beam 16 is provided on the side of the ground fixed bracket 01 away from the cylindrical sand box 03. The second motor 14 is mounted on the fixed support beam 16. The second lead screw 15 is horizontally positioned and connected to the second motor 14 via a coupling. The right end of the second lead screw 15 is fixedly mounted on the lower end of the movable bracket 06. In operation, the second motor 14 transmits its rotational motion to the second lead screw 15 via the coupling. By controlling the forward and reverse rotation of the second motor 14, the movable bracket 06 can move left and right, allowing it to approach or move away from the cylindrical sand box 03, so as to cover or remove the intermediate frequency induction heater 07 from the cylindrical sand box 03. It can be understood that, as Figure 5 and 6 As shown, when the medium-frequency induction heater 07 is fitted over the cylindrical sand box 03, the medium-frequency induction heater 07 is in a heating state. Through induction heating, the alloy steel and high-chromium cast iron liquid are fully melted and bonded with the metal partition, avoiding poor fusion in different areas due to uneven heat distribution; for example... Figure 1 , 2 As shown in Figure 4, after heating is complete, the medium-frequency induction heater 07 is removed from the cylindrical sand box 03. Of course, the temperature of the casting is very high immediately after heating. In order to cool the cylindrical sand box 03 and the casting inside and improve the cooling efficiency, a water cooling system can be installed inside the medium-frequency induction heater 07. After heating is completed, the water cooling system is activated to help the casting cool to a certain temperature (such as 300℃) before the medium-frequency induction heater 07 is removed. Of course, in order to make the moving bracket 06 move more smoothly left and right, smooth rods can also be set on both sides of the second lead screw 15. The specific connection relationship is similar to that of the smooth rods on both sides of the first lead screw, which will not be described in detail here.

[0044] In some examples of this embodiment, such as Figure 10 and 11 As shown, the medium-frequency induction heater 07 also includes an insulating plate 74, which is vertically arranged on the inner side wall of the coil support 71. The heating coil 72 passes through the insulating plate 74 and is arranged around the coil support 71. The insulating plate 74 serves to fix the heating coil 72, so that the heating coil 72 is at a certain distance from the heating support 71.

[0045] Specifically, such as Figure 1 As shown, it also includes a control cabinet 17, which is used to control the heating of the intermediate frequency induction heater 07 and the movement of the first motor 09 and the second motor 14. Specifically, the relevant control actions can be integrated into a controller 18 for user operation. Specifically, infrared limit devices can also be set on the moving support 06 and the moving trajectory of the intermediate frequency induction heater 07, such as... Figure 1 As shown, a first limiting device 19 is set on the left side of the cylindrical sand box 03, near the cylindrical sand box 03, to control the extreme position of the moving support 06 to the right; a second limiting device 20 is set on the lower part of the front vertical beam 623 or the rear vertical beam 624 of the moving support 06 to control the extreme position of the connecting plate 73 to the downward movement. The first limiting device 19 and the second limiting device 20 can be set according to specific needs to adapt to different production requirements.

[0046] The following describes the method of using the above-mentioned device, which includes the following steps: (1) Place the lost foam model 04 into the cylindrical sand box 03, then fill with sand, vibrate, and evacuate; (2) Simultaneously inject the molten alloy steel and high-chromium cast iron liquid from the left and right sides of the metal partition 05 into the lost foam model cavity; (3) Start the first motor 09 and the second motor 14 to move the medium frequency induction heater 07 to the limit position; (4) Start the medium frequency induction heater 07, heat and maintain the temperature for several minutes; (5) Stop heating and move the medium frequency induction heater 07 outside the cylindrical sand box 03; (6) After the casting has cooled to below 300°C, remove the casting from the cylindrical sand box 03 and clean it.

[0047] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0048] Although exemplary embodiments of the present invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the present invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the present invention.

Claims

1. A manufacturing apparatus for large wear-resistant liners using a dual-liquid composite casting method, characterized in that, The ground fixed support is provided with a plurality of guide rails on its upper surface; A cylindrical sand box is arranged on the ground fixed support, and a vertical split lost foam model is arranged in the cylindrical sand box. A metal partition plate is vertically arranged in the middle of the lost foam model, and molten alloy steel and high chromium cast iron liquid can be respectively injected into the lost foam model cavity from the left and right sides of the metal partition plate. A moving support is arranged on the guide rails, and under the action of a driving mechanism, the moving support can approach or move away from the cylindrical sand box. A medium frequency induction heater is arranged on the moving support, and includes a coil support, a heating coil and a connecting plate. The coil support is a cylindrical shape with an upper and lower opening. The heating coil is insulated from the coil support and is arranged in the coil support along the side wall of the coil support. The middle part of the heating coil has a first space for accommodating the cylindrical sand box. The connecting plate is horizontally arranged on one side of the coil support close to the moving support. The projection of the connecting plate and the moving support on the horizontal plane partially overlaps, and a first fixing hole is arranged at the overlapping position. A first lead screw is arranged through the first fixing hole. A first motor is connected with the first lead screw, so that the rotation of the first motor can drive the medium frequency induction heater to move up and down.

2. The manufacturing device of the double liquid composite cast large wear-resistant lining plate according to claim 1, characterized in that: The metal partition plate is made of Q234 steel plate and is arranged along the thickness direction of the lost foam model. The distance from the metal partition plate to the lining plate mounting surface is one third of the thickness of the lost foam model.

3. The manufacturing device of the double liquid composite cast large wear-resistant lining plate according to claim 1, characterized in that: A vacuum negative pressure device is also included, which includes a vacuum pump, a cooling water circulating device and a control device. A plurality of negative pressure pipes are arranged along the inner arm and the bottom of the cylindrical sand box. The negative pressure pipes are symmetrically distributed, interconnected and concentrated into a total channel. A negative pressure pipe interface is arranged outside the cylindrical sand box and communicates with the total channel. The negative pressure pipe interface is connected with the vacuum pump to enable the cylindrical sand box to be subjected to negative pressure.

4. The apparatus for manufacturing a double liquid composite cast large wear-resistant lining plate according to claim 1, characterized in that: The moving support includes a horizontal frame and a vertical frame which are welded by a plurality of steel plates. The horizontal frame and the vertical frame are combined into an "L" shape. The horizontal frame includes a front beam, a rear beam and a left beam. The vertical frame includes an upper beam, a lower beam, a front vertical beam and a rear vertical beam. Two guide rails are arranged on the ground fixed support corresponding to the positions of the front beam and the rear beam of the horizontal frame.

5. The manufacturing device of the double liquid composite cast large wear-resistant lining plate according to claim 4, characterized in that: Two second fixing holes are arranged on the upper beam and the connecting plate corresponding to the positions of the first fixing holes. The second fixing holes are symmetrically arranged on the two sides of the first fixing holes and are in a straight line with the first fixing holes. A polished rod is arranged in the second fixing hole. The lower end of the polished rod is fixed on the connecting plate, and the upper end of the polished rod passes through the second fixing hole of the upper beam.

6. The manufacturing device of the double liquid composite cast large wear-resistant lining plate according to claim 5, characterized in that: A linear bearing is arranged in the second fixing hole, and the polished rod is arranged in the linear bearing.

7. The apparatus according to claim 1, wherein: A counterweight is arranged on the connecting plate away from the medium frequency induction heater.

8. The apparatus according to claim 1, wherein: The driving mechanism includes a second motor and a second lead screw. A fixed support cross beam is arranged on the side of the ground fixed support away from the cylindrical sand box. The second motor is arranged on the fixed support cross beam. The second lead screw is horizontally arranged and connected with the second motor through a coupling. The right end of the second lead screw is fixedly arranged on the lower end of the moving support.

9. The manufacturing device of the double liquid composite cast large wear-resistant lining plate according to claim 7, characterized in that: Also included is a control cabinet for controlling the heating of the intermediate frequency induction heater, the movement of the first motor and the second motor.

10. The apparatus according to claim 1, wherein: The intermediate frequency induction heater also includes an insulating plate vertically arranged on the inner side wall of the coil support, and the heating coil is arranged in the coil support in a loop through the insulating plate.

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