High-chromium cast iron grinding ball quenching and cooling device

Abstract

This invention belongs to the field of grinding ball quenching and cooling technology, specifically a high-chromium cast iron grinding ball quenching and cooling device, including a quenching and cooling box; a guide plate is fixed to the inner inclined surface of the quenching and cooling box, and the guide plate is provided with a curved inclined groove; the high-chromium cast iron grinding balls after heating and heat preservation are intermittently sent to the highest point of the guide plate of the quenching and cooling box by an external conveyor. The grinding balls automatically roll along the curved inclined groove of the guide plate. The curved inclined groove is divided into a heat exchange zone, a pre-cooling zone and a rapid cooling zone. The cold air generated by the refrigerator is introduced into the pre-cooling zone and the rapid cooling zone through the air-cooling pipe, and is independently controlled by two No. 1 solenoid valves to realize temperature difference regulation, so that the temperature of the rapid cooling zone is lower than that of the pre-cooling zone. The grinding balls first dissipate heat in the heat exchange zone, then pre-cool in the pre-cooling zone, and finally enter the rapid cooling zone for rapid cooling. Then they fall into the inclined groove guide water quenching cylinder. The water quenching mechanism drives the water quenching cylinder to rotate, so that the grinding balls roll on the inclined wall inside the cylinder and are fully and evenly water cooled.

Description

Technical Field

[0001] This invention belongs to the field of grinding ball quenching and cooling technology, specifically a high-chromium cast iron grinding ball quenching and cooling device. Background Technology

[0002] High-chromium cast iron grinding balls are a high-performance grinding medium widely used in ball mills in industries such as mining, cement, and power. Their outstanding features are high chromium content and a large amount of high-hardness eutectic carbides in their structure, which gives them high hardness and excellent wear resistance. They also have toughness, which can effectively resist impact and spalling during the grinding process. Compared with ordinary forged steel balls, their wear rate is significantly reduced and their service life is greatly extended.

[0003] High-chromium cast iron grinding balls are typically manufactured using a medium-frequency induction furnace. Raw materials such as scrap steel, ferrochrome, and pig iron are melted to the required composition and then poured into a metal mold at high temperature. After casting, the balls require quenching to fully utilize their hardness potential. This is usually done by heating and holding the balls at a suitable temperature for an appropriate time to allow the carbides and matrix to fully dissolve and austenitize. They are then cooled in a quenching medium. Due to the good hardenability of high-chromium cast iron, gentler methods such as air cooling, wind cooling, mist cooling, and water cooling are commonly used to avoid cracking. Oil quenching or polymer solution quenching can also be used. After quenching, most of the austenite transforms into a high-hardness martensite matrix, which, combined with the existing eutectic carbides, forms a wear-resistant structure. Finally, depending on actual needs, low-temperature tempering can be performed to eliminate internal stress and appropriately adjust the toughness.

[0004] In the traditional quenching and cooling process of high-chromium cast iron grinding balls, a relatively simple open cooling device is usually used to achieve rapid cooling. The core of this device is an open cooling water tank made of steel plate with pipes at the bottom and a high-flow-rate circulating water pump to circulate the cooling water. To ensure efficient cooling, multiple rows of adjustable-angle spray nozzles are arranged around the tank walls. When the high-temperature high-chromium cast iron grinding balls are poured into the tank from the conveyor belt, the powerful circulating water pump and the all-round spray from the spray nozzles can quickly remove the heat, thereby achieving rapid cooling. However, although this open cooling method of traditional quenching and cooling devices can quickly reduce the temperature of the grinding balls, it lacks gradient quenching and cooling, which can easily lead to the risk of cracking of the grinding balls due to excessively rapid cooling.

[0005] Therefore, the present invention provides a quenching and cooling device for high-chromium cast iron grinding balls. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: A high-chromium cast iron grinding ball quenching and cooling device of the present invention includes a quenching and cooling box; a guide plate is fixedly connected to the inner inclined surface of the quenching and cooling box, and a curved inclined groove is opened on the guide plate; a sloping groove is opened at one end of the quenching and cooling box near the guide plate; a partition plate is fixedly connected to the guide plate; a cooler is fixedly connected to the outside of the quenching and cooling box; an air-cooling pipe is fixedly connected to the output end of the cooler, and the air-cooling pipe is fixedly connected to the partition plate, the air-cooling pipe has two output ends, and each of the two output ends is fixedly connected to a solenoid valve; a water quenching cylinder is rotatably connected to the quenching and cooling box near the sloping groove, and the inner wall of the water quenching cylinder is set as a slope; a water quenching mechanism is provided on the outside of the quenching and cooling box near the water quenching cylinder, and the water quenching mechanism is used to drive the water quenching cylinder to rotate and water quench and cool the grinding ball.

[0008] Preferably, the water quenching mechanism includes a storage tank, a water inlet pipe, a nozzle, a water inlet trough, an arc-shaped plate, and a transmission assembly; the storage tank is fixedly connected to the quenching cooling tank, and the storage tank is positioned near the upper part of the water quenching cylinder; the water inlet pipe is fixedly connected to one side of the storage tank; the nozzle is fixedly connected to the bottom of the storage tank, and the nozzle is in contact with the outer surface of the water quenching cylinder; multiple water inlet troughs are formed on the water quenching cylinder, and the nozzles correspond to the water inlet troughs; the arc-shaped plate is fixedly connected to the quenching cooling tank, and the arc-shaped plate is in contact with the outer surface of the water quenching cylinder; the transmission assembly is disposed on the quenching cooling tank, and the transmission assembly is used to drive the water quenching cylinder to rotate.

[0009] Preferably, the transmission assembly includes a servo motor, a first gear, and a second gear; the servo motor is fixedly connected to the quenching cooling box and is located near the water quenching cylinder; the first gear is fixedly connected to the output end of the servo motor; the second gear is sleeved on the water quenching cylinder, and the first gear can mesh with the second gear.

[0010] Preferably, multiple side inclined plates are fixedly connected to the inner side of the curved inclined groove of the guide plate; multiple top inclined plates are fixedly connected to the bottom of the curved inclined groove of the guide plate; a heat exchange plate is fixedly connected to the guide plate, and the heat exchange plate is located inside the curved inclined groove; two heat exchange rods are fixedly connected to the heat exchange plate, the heat exchange plate and the heat exchange rods are made of metal, and the two heat exchange rods penetrate through the quenching cooling box.

[0011] Preferably, a conductive air duct is fixedly connected to one output end of the air-cooled pipe away from the refrigerator; a curved air plate is fixedly connected to the bottom of the conductive air duct, and the cross-sectional shape of the curved air plate corresponds to the curved inclined groove.

[0012] Preferably, a spiral plate is fixedly connected to the inner wall of the water quenching cylinder; a flow-blocking ring plate is fixedly connected to the end of the water quenching cylinder away from the quenching cooling box; and multiple drop plates are fixedly connected to the inner wall of the water quenching cylinder.

[0013] Preferably, a rotating rod is rotatably connected to the quenching cooling box, and a fan blade is fixedly connected to the rotating rod; a third gear is fixedly connected to the rotating rod, and the third gear can mesh with the first gear; a fixed frame is fixedly connected to the quenching cooling box; a wind duct is fixedly connected to the fixed frame, and the fan blade is located inside the wind duct; a guide duct is fixedly connected to the wind duct; a guide plate is fixedly connected to the end of the guide duct away from the wind duct, and the guide plate is located at the material guide plate; multiple air holes are opened on the quenching cooling box near the material guide plate.

[0014] Preferably, a fixed cylinder is fixedly connected to the air guide duct via a second solenoid valve; an electric slider is slidably connected to the fixed cylinder; a sliding cylinder is fixedly connected to the electric slider; a switching plate is fixedly connected to the sliding cylinder; multiple hollow air ducts are fixedly connected to the quenching cooling box, and one end of the hollow air duct is attached to the outer wall of the switching plate, and multiple oblique holes are opened on the hollow air duct.

[0015] Preferably, a No. 1 air storage plate is fixedly connected to one end of the three hollowed-out air ducts away from the switching plate; a No. 1 return pipe is fixedly connected to the No. 1 air storage plate; a support frame is fixedly connected to the switching plate; a connecting plate is fixedly connected to one end of the support frame away from the switching plate, and the connecting plate can slide and communicate with the No. 1 return pipe; an air guide box is fixedly connected to the partition plate, and the connecting plate is slidably connected to the inner wall of the air guide box.

[0016] Preferably, a second air storage plate is fixedly connected to the two hollowed-out air ducts; a second return pipe is fixedly connected to the second air storage plate, and the connecting plate can slide and communicate with the second return pipe; a cooling pipe is fixedly connected to the storage box, and the cooling pipe and the second return pipe are arranged opposite to each other.

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

[0018] 1. The high-chromium cast iron grinding ball quenching and cooling device of the present invention intermittently delivers heated and kept-temperature high-chromium cast iron grinding balls to the highest point of the guide plate of the quenching and cooling box via an external conveyor. The grinding balls automatically roll along the curved inclined groove of the guide plate. The curved inclined groove is divided into three sections: a heat exchange zone, a pre-cooling zone, and a rapid cooling zone, which are separated by a partition plate fixed on the quenching and cooling box. The cold air generated by the cooler is introduced into the pre-cooling zone and the rapid cooling zone through air-cooling pipes, and is independently controlled by two No. 1 solenoid valves to achieve temperature difference regulation. The temperature in the rapid cooling zone is lower than that in the pre-cooling zone. The grinding balls first dissipate heat in the heat exchange zone, then are pre-cooled in the pre-cooling zone, and finally enter the rapid cooling zone for rapid cooling. They then fall into the inclined groove guide water quenching cylinder. The water quenching mechanism drives the water quenching cylinder to rotate, causing the grinding balls to tumble on the inclined wall inside the cylinder for thorough and uniform water cooling. The water circulation system promptly discharges hot water and replenishes cold water to maintain the cooling effect. After water quenching, the grinding balls are discharged from the outlet and enter subsequent testing and packaging. This gradient quenching cooling method effectively reduces the risk of grinding ball cracking and ensures quenching quality.

[0019] 2. The high-chromium cast iron grinding ball quenching and cooling device of the present invention requires temperature control of the pre-cooling zone and the rapid cooling zone for high-chromium cast iron grinding balls of different specifications. Temperature sensors are installed in both zones to monitor temperature changes. When a temperature increase is required, the second solenoid valve is opened, and the electric slider drives the sliding cylinder to slide on the fixed cylinder, so that the originally misaligned and blocked switching plate is connected to the hollow air duct. Part of the air is sent into the hollow air duct through the guide air duct, the fixed cylinder, the sliding cylinder, and the switching plate. The cold air in the zone is discharged through the inclined hole, thereby increasing the temperature. This device is suitable for small-sized grinding balls. For large-sized grinding balls, the second solenoid valve is closed, so that the switching plate misaligns and blocks the hollow air duct. The temperature is adjusted only by controlling the first solenoid valve, so as to achieve adaptive temperature control cooling for grinding balls of different specifications. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a schematic diagram of the hollowed-out air duct structure in this invention;

[0023] Figure 3 This is a schematic diagram of the partition plate in this invention;

[0024] Figure 4 This is a schematic diagram of the curved wind vane in this invention;

[0025] Figure 5 This is a schematic diagram of the material guide plate in this invention;

[0026] Figure 6 This is a schematic diagram of the structure of the wind plate in this invention;

[0027] Figure 7 This is a schematic diagram of the structure of gear number three in this invention;

[0028] Figure 8 This is a schematic diagram of the flow-blocking ring plate in this invention.

[0029] In the diagram: 1. Quenching cooling box; 11. Guide plate; 12. Inclined trough; 13. Divider plate; 14. Refrigerator; 15. Air-cooled pipe; 16. Water quenching cylinder; 2. Storage box; 21. Water inlet pipe; 22. Spray nozzle; 23. Water inlet trough; 24. Arc plate; 3. Servo motor; 31. Gear No. 1; 32. Gear No. 2; 4. Side inclined plate; 41. Top inclined plate; 42. Heat exchange plate; 43. Heat exchange rod; 5. Conductive air duct; 51. Curved air plate; 6. Spiral plate; 1. Baffle plate; 62. Drop plate; 7. Rotating rod; 71. Gear No. 3; 72. Fixing frame; 73. Air duct; 74. Guide air duct; 75. Air guide plate; 76. Air hole; 8. Fixing cylinder; 81. Electric slider; 82. Sliding cylinder; 83. Switching plate; 84. Hollowed-out air duct; 9. No. 1 air storage plate; 91. No. 1 return pipe; 92. Connecting plate; 93. Support frame; 94. Air guide box; 95. No. 2 air storage plate; 96. No. 2 return pipe; 97. Cooling pipe. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] like Figures 1 to 8As shown in the embodiment of the present invention, a quenching and cooling device for high-chromium cast iron grinding balls includes a quenching and cooling box 1; a guide plate 11 is fixedly connected to the inclined surface inside the quenching and cooling box 1, and a curved inclined groove is formed on the guide plate 11; a sloping groove 12 is formed at one end of the quenching and cooling box 1 near the guide plate 11; a partition plate 13 is fixedly connected to the guide plate 11; a cooler 14 is fixedly connected to the outside of the quenching and cooling box 1; an air-cooling pipe 15 is fixedly connected to the output end of the cooler 14, and the air-cooling pipe 15 is fixedly connected to the partition plate 13. The air-cooling pipe 15 has two output ends, and each of the two output ends is fixedly connected to a solenoid valve; the quenching and cooling box 1... A water quenching cylinder 16 is rotatably connected near the inclined groove 12, and the inner wall of the water quenching cylinder 16 is set as an incline; a water quenching mechanism is set on the outside of the quenching cooling box 1 near the water quenching cylinder 16, which is used to drive the water quenching cylinder 16 to rotate and water quench and cool the grinding balls; when the high-quality cast iron grinding balls are automatically quenched and cooled, the heated and heat-preserved high-quality cast iron grinding balls are intermittently conveyed by an external conveyor. The high-quality cast iron grinding balls are sent to the highest point of the guide plate 11 on the quenching cooling box 1 and placed down. The grinding balls automatically enter the curved inclined groove of the guide plate 11 and roll in a curved shape. The grinding balls automatically roll from the highest point of the guide plate 11 to the inclined groove 12. The inclined trough is divided into three sections: the first section is the heat exchange zone, the second section is the pre-cooling zone, and the third section is the rapid cooling zone. A partition plate 13 is fixed to the quenching cooling box 1 to separate the three zones. The cooler 14 generates cold air, which is then circulated into the pre-cooling zone and the rapid cooling zone through the air-cooling pipe 15. The temperature difference between the pre-cooling zone and the rapid cooling zone is controlled by two No. 1 solenoid valves, ensuring that the temperature of the rapid cooling zone is lower than that of the pre-cooling zone. The grinding balls undergo initial heat dissipation in the heat exchange zone, then roll to the pre-cooling zone for pre-cooling, followed by rapid cooling in the rapid cooling zone. Finally, the grinding balls fall into the inclined trough 12 and are guided into the water quenching cylinder 16, where the water quenching mechanism rotates the cylinder. The grinding balls are cooled by water quenching. This gradient quenching method can effectively reduce the risk of cracking caused by excessive cooling. After the grinding balls enter the water quenching stage, the design of the water quenching mechanism allows the grinding balls to fully contact the water inside the water quenching cylinder 16. The water quenching mechanism can drive the water quenching cylinder 16 to rotate continuously, allowing the grinding balls to roll continuously on the sloping inner wall of the water quenching cylinder 16, ensuring that all parts of the grinding balls are cooled evenly by water. At the same time, the water quenching mechanism is also equipped with a water circulation system, which can promptly discharge the hot water that has absorbed the heat of the grinding balls and replenish new cold water to maintain the effect of water quenching. The water circulation system is not shown in the figure and can be installed with an existing water cooling device.

[0032] After the grinding balls have completed water quenching and cooling, they will be discharged from the outlet of the water quenching cylinder 16 and enter the subsequent testing and packaging stages. The entire high-chromium cast iron grinding ball automatic quenching and cooling device can not only ensure the quenching quality of the grinding balls through this gradient quenching and cooling method, but also reduce the risk of grinding balls cracking.

[0033] The water quenching mechanism includes a storage tank 2, a water inlet pipe 21, a spray head 22, a water inlet trough 23, an arc-shaped plate 24, and a transmission assembly. The storage tank 2 is fixedly connected to the quenching cooling tank 1, and is positioned near the top of the water quenching cylinder 16. The water inlet pipe 21 is fixedly connected to one side of the storage tank 2. The spray head 22 is fixedly connected to the bottom of the storage tank 2, and is attached to the outer surface of the water quenching cylinder 16. Multiple water inlet troughs 23 are formed on the water quenching cylinder 16, and the spray heads 22 correspond to the water inlet troughs 23. The arc-shaped plate 24 is fixedly connected to the quenching cooling tank 1, and is attached to the outer surface of the water quenching cylinder 16. The transmission assembly is disposed on the quenching cooling tank 1, and is used for... The water quenching cylinder 16 is rotated. When the high-chromium cast iron grinding balls are water quenched, they are guided from the inclined groove 12 into the water quenching cylinder 16. The transmission component drives the water quenching cylinder 16 to rotate. Water is pumped from the water inlet pipe 21 into the storage tank 2 for temporary storage. The water inside the storage tank 2 flows down through the spray head 22 into multiple water inlet grooves 23. The cold water enters the water quenching cylinder 16 along the water inlet grooves 23. The arc plate 24 shields the bottom of the water quenching cylinder 16 to reduce water loss. The high-chromium cast iron grinding balls are in full contact with the cold water in the water quenching cylinder 16, achieving rapid quenching and cooling. As the water quenching cylinder 16 continues to rotate, the water quenching mechanism can evenly cover the surface of each grinding ball, ensuring the consistency of the cooling effect.

[0034] The transmission assembly includes a servo motor 3, a first gear 31, and a second gear 32. The servo motor 3 is fixedly connected to the quenching cooling box 1 and is located near the water quenching cylinder 16. The first gear 31 is fixedly connected to the output end of the servo motor 3. The second gear 32 is sleeved on the water quenching cylinder 16, and the first gear 31 can mesh with the second gear 32. When the water quenching cylinder 16 is rotated, the output end of the servo motor 3 drives the first gear 31 to rotate, and the first gear 31 synchronously drives the water quenching cylinder 16 connected to the second gear 32 to rotate. The structure of the second gear 32 meshes tightly with the first gear 31, thereby effectively transmitting power, so that the high-chromium cast iron grinding ball can be fully water quenched and cooled inside the water quenching cylinder 16.

[0035] like Figures 1 to 5As shown, multiple side inclined plates 4 are fixedly connected to the inner side of the curved inclined groove of the guide plate 11; multiple top inclined plates 41 are fixedly connected to the bottom of the curved inclined groove of the guide plate 11; a heat exchange plate 42 is fixedly connected to the guide plate 11, and the heat exchange plate 42 is located inside the curved inclined groove; two heat exchange rods 43 are fixedly connected to the heat exchange plate 42, the heat exchange plate 42 and the heat exchange rods 43 are made of metal, and the two heat exchange rods 43 penetrate the quenching cooling box 1; when the high-temperature high-chromium cast iron grinding ball falls from the highest point of the guide plate 11 into the curved inclined groove, the grinding ball can first adhere to the surface of the heat exchange plate 42 during the rolling process, and the heat exchange plate 42 and the heat exchange rods 43 The metal material can exchange heat with the high-temperature high-chromium cast iron grinding balls, transferring the heat from the high-chromium cast iron grinding balls to the outside through the heat exchange rod 43, thereby achieving an initial heat exchange and cooling effect. Subsequently, the high-chromium cast iron grinding balls enter the pre-cooling zone and the rapid cooling zone. Guided by multiple side inclined plates 4 and top inclined plates 41, the high-chromium cast iron grinding balls can undulate and deviate from their original rolling trajectory during rolling, further improving cooling efficiency and uniformity. The arrangement of multiple side inclined plates 4 and top inclined plates 41 can provide a stable guiding effect during the rolling of the grinding balls, thereby effectively reducing the overall temperature of the grinding balls and laying a good foundation for the subsequent water quenching steps.

[0036] like Figures 1 to 4 As shown, a conductive air duct 5 is fixedly connected to one output end of the air-cooled pipe 15 away from the refrigerator 14; a curved air plate 51 is fixedly connected to the bottom of the conductive air duct 5, and the cross-sectional shape of the curved air plate 51 corresponds to the curved groove; when the high-chromium cast iron grinding ball is pre-cooled, the conductive air duct 5 connected to the air-cooled pipe 15 introduces cold air into the curved air plate 51, and the curved air plate 51 fits against the upper part of the curved groove to pre-cool the high-chromium cast iron grinding ball during the rolling process. The cold air is evenly distributed in the curved air plate 51. Through its fitting design with the curved groove, it is ensured that the high-chromium cast iron grinding ball can come into full contact with the cold air flow during the rolling process. This design not only improves the pre-cooling effect, but also reduces the uneven cooling caused by excessive local temperature.

[0037] like Figures 1 to 4 , Figures 6 to 8 As shown, a spiral plate 6 is fixedly connected to the inner wall of the water quenching cylinder 16; a flow-blocking ring plate 61 is fixedly connected to the end of the water quenching cylinder 16 away from the quenching cooling box 1; and multiple drop plates 62 are fixedly connected to the inner wall of the water quenching cylinder 16. When the high-chromium cast iron grinding balls are water quenched in the water quenching cylinder 16, the spiral plate 6, together with the multiple drop plates 62, is fixed to the inner wall of the water quenching cylinder 16. The high-chromium cast iron grinding balls can be water quenched around the spiral trajectory of the spiral plate 6. During the water quenching process, the balls can fall down once each time they encounter a drop plate 62, thereby improving the overall water quenching effect. After the grinding balls are water quenched, water is discharged from the gap of the flow-blocking ring plate 61. The water can be cooled and circulated, and the grinding balls can be collected.

[0038] like Figures 1 to 4 , Figure 6 , Figure 7 As shown, a rotating rod 7 is rotatably connected to the quenching cooling box 1, and a fan blade is fixedly connected to the rotating rod 7; a third gear 71 is fixedly connected to the rotating rod 7, and the third gear 71 can mesh with the first gear 31; a fixed frame 72 is fixedly connected to the quenching cooling box 1; a wind duct 73 is fixedly connected to the fixed frame 72, and the fan blade is located inside the wind duct 73; a guide duct 74 is fixedly connected to the wind duct 73; a guide plate 75 is fixedly connected to the end of the guide duct 74 away from the wind duct 73, and the guide plate 75 is located at the guide plate 11; the quenching cooling box 1 is located near the guide plate. Multiple air vents 76 are provided at 11 locations. When the grinding balls in the heat exchange zone are cooled, the multiple air vents 76 are opened on one side of the quenching and cooling box 1 for ventilation. As the output end of the servo motor 3 drives the first gear 31 to rotate, the third gear 71, which is smaller than the first gear 31, meshes and rotates rapidly. The third gear 71 drives the fan blades on the rotating rod 7 to quickly draw air in the air duct 73. The drawn air is sent to the air guide plate 75 through the guide air duct 74 and blown out. During the rolling of the high chromium cast iron grinding balls in the heat exchange zone, the air will exhaust some of the heat from the air vents 76, improving the cooling effect on the high chromium cast iron grinding balls.

[0039] A fixed cylinder 8 is fixedly connected to the air duct 74 via a second solenoid valve; an electric slider 81 is slidably connected to the fixed cylinder 8; a sliding cylinder 82 is fixedly connected to the electric slider 81; a switching plate 83 is fixedly connected to the sliding cylinder 82; multiple perforated air ducts 84 are fixedly connected to the quenching cooling box 1, with one end of each perforated air duct 84 fitting against the outer wall of the switching plate 83, and multiple oblique holes are provided on each perforated air duct 84; when automatically quenching and cooling high-chromium cast iron grinding balls of different specifications, the temperatures of the pre-cooling zone and the rapid cooling zone need to be adjusted again. Temperature sensors are installed in both the pre-cooling zone and the rapid cooling zone to monitor temperature changes within the area. At this time, the second solenoid valve on the fixed cylinder 8 opens, and the electric slider 81 drives the sliding cylinder. 82 slides on the fixed cylinder 8, and then the switching plate 83, which was originally misaligned and blocked by multiple hollow air ducts 84, slides and connects. As part of the air introduced by the guide air duct 74 passes through the fixed cylinder 8, the sliding cylinder 82, and the switching plate 83, it is sent into the multiple hollow air ducts 84. After passing through the interior of the hollow air ducts 84 and multiple inclined holes, the cold air in the pre-cooling zone and the rapid cooling zone is discharged, thereby increasing the temperature in the pre-cooling zone and the rapid cooling zone. This is suitable for automatic quenching and cooling of small-sized high-chromium cast iron grinding balls. When quenching and cooling large-sized high-chromium cast iron grinding balls, it is necessary to close the second solenoid valve and misalign and block the hollow air duct 84, and control the opening and closing of the first solenoid valve. This plays a role in adaptive temperature control and cooling of high-chromium cast iron grinding balls of different sizes.

[0040] One of the three hollowed-out air ducts 84 is fixedly connected to a No. 1 air storage plate 9 at the end away from the switching plate 83; a No. 1 return pipe 91 is fixedly connected to the No. 1 air storage plate 9; a support frame 93 is fixedly connected to the switching plate 83; a connecting plate 92 is fixedly connected to the end of the support frame 93 away from the switching plate 83, and the connecting plate 92 can slide and communicate with the No. 1 return pipe 91; an air guide box 94 is fixedly connected to the partition plate 13, and the connecting plate 92 is slidably connected to the inner wall of the air guide box 94; when a small amount of cold air in the pre-cooling zone is discharged and recovered... The connecting plate 92 can slide synchronously with the switching plate 83 connected to the support frame 93, so that the switching plate 83 is connected to multiple hollow air ducts 84. The first return pipe 91 can also be connected to the connecting plate 92 and the air guide box 94. The cold air is discharged to the first air storage plate 9 through the three hollow air ducts 84, and then sent into the connected connecting plate 92 through the first return pipe 91. The cold air passes through the connecting plate 92 to the air guide box 94 and is discharged to the heat exchange area. The small amount of cold air discharged can improve the cooling effect on the rolling grinding ball.

[0041] A second air storage plate 95 is fixedly connected to each of the two perforated air ducts 84; a second return pipe 96 is fixedly connected to each of the second air storage plates 95, and a connecting plate 92 can slide and connect with the second return pipe 96; a cold guide pipe 97 is fixedly connected to the storage box 2, and the cold guide pipe 97 and the second return pipe 96 are arranged opposite to each other; when the cold air in the rapid cooling zone is recovered, the air flow force in the two perforated air ducts 84 in the rapid cooling zone is used to guide the cold air in the rapid cooling zone through the second air storage plate 95 into the second return pipe 96, and then the second return pipe 96 sends the cold air to the cold guide pipe 97 through the connecting plate 92. The cold air that passes through the cold guide pipe 97 reaches the storage box 2, and the cold air can cool the water in the storage box 2, thereby achieving further temperature control in the rapid cooling zone and improving the cooling effect. Through this design, not only can the cold air be effectively recovered, but it can also be used for temperature management in other areas, achieving the effect of energy saving and environmental protection.

[0042] Working process: During the automatic quenching and cooling of high-strength cast iron grinding balls, the heated and insulated high-strength cast iron grinding balls are intermittently conveyed by an external conveyor. The grinding balls are sent to the highest point of the guide plate 11 on the quenching and cooling box 1 and placed down. The grinding balls automatically enter the curved inclined groove of the guide plate 11 and roll in a curved shape. The grinding balls automatically roll from the highest point of the guide plate 11 to the inclined groove 12. The curved inclined groove of the guide plate 11 is divided into three sections: the first section is the heat exchange zone, the second section is the pre-cooling zone, and the third section is the rapid cooling zone. The partition plate 13 is fixed on the quenching and cooling box 1 to separate the three zones. The cooler 14 generates cold air and introduces it into the pre-cooling zone and the rapid cooling zone through the air cooling pipe 15. The temperature of the pre-cooling zone and the rapid cooling zone is controlled by the opening and closing of two No. 1 solenoid valves. Differential temperature control ensures that the temperature in the rapid cooling zone is lower than that in the pre-cooling zone. The grinding balls undergo initial heat dissipation in the heat exchange zone, then roll to the pre-cooling zone for pre-cooling, followed by rapid cooling in the rapid cooling zone. Finally, the grinding balls fall into the inclined groove 12 and are guided to slide into the water quenching cylinder 16. The water quenching mechanism drives the water quenching cylinder 16 to rotate, further cooling the grinding balls. This gradient quenching cooling method effectively reduces the risk of cracking due to excessively rapid cooling. After entering the water quenching stage, the design of the water quenching mechanism ensures that the grinding balls are fully in contact with water within the water quenching cylinder 16. The water quenching mechanism continuously rotates the water quenching cylinder 16, causing the grinding balls to tumble on the inclined inner wall of the water quenching cylinder 16, ensuring that all parts of the grinding balls are uniformly cooled by water. Simultaneously, the water quenching mechanism also… Equipped with a water circulation system, the hot water that has absorbed the heat from the grinding balls can be discharged in a timely manner, and new cold water can be added to maintain the water quenching effect. The water circulation system is not shown in the figure; it can be installed with an existing water cooling device. After the grinding balls have completed water quenching, they will be discharged from the outlet of the water quenching cylinder 16 and enter the subsequent inspection and packaging stages. The entire automatic quenching and cooling device for high-chromium cast iron grinding balls, through this gradient quenching and cooling method, can not only ensure the quenching quality of the grinding balls, but also reduce the risk of cracking. When the high-chromium cast iron grinding balls are water quenched, they are guided from the inclined groove 12 into the water quenching cylinder 16. The transmission component drives the water quenching cylinder 16 to rotate, and water is pumped from the water inlet pipe 21 into the storage tank 2 for temporary storage. The water inside the storage tank 2 is circulated... The cold water flows down through the jet head 22 into multiple water inlet tanks 23. The cold water then enters the water quenching cylinder 16 through the water inlet tanks 23. The arc-shaped plate 24 shields the bottom of the water quenching cylinder 16 to reduce water loss. The high-chromium cast iron grinding balls are in full contact with the cold water inside the water quenching cylinder 16, achieving rapid quenching and cooling. As the water quenching cylinder 16 continues to rotate, the water quenching mechanism can evenly cover the surface of each grinding ball, ensuring consistent cooling effect. When the water quenching cylinder 16 is rotated, the output end of the servo motor 3 drives the first gear 31 to rotate. The first gear 31 synchronously drives the water quenching cylinder 16 connected to the second gear 32 to rotate. The structure of the second gear 32 meshes tightly with the first gear 31, effectively transmitting power so that the high-chromium cast iron grinding balls can undergo comprehensive water quenching and cooling inside the water quenching cylinder 16.

[0043] When the high-temperature high-chromium cast iron grinding balls fall from the highest point of the guide plate 11 into the curved inclined groove, the grinding balls can first adhere to the surface of the heat exchange plate 42 during the rolling process. The metal material of the heat exchange plate 42 and the heat exchange rod 43 can exchange heat with the high-temperature high-chromium cast iron grinding balls, and transfer the heat of the high-chromium cast iron grinding balls to the outside through the heat exchange rod 43, thereby achieving a preliminary heat exchange and cooling effect. Subsequently, the high-chromium cast iron grinding balls enter the pre-cooling zone and the rapid cooling zone. With the guidance of multiple side inclined plates 4 and top inclined plates 41, the high-chromium cast iron grinding balls can undulate and deviate from their original rolling trajectory during the rolling process, further improving the cooling efficiency and uniformity. The arrangement of multiple side inclined plates 4 and top inclined plates 41 can provide a stable guiding effect during the rolling process of the grinding balls, thereby effectively reducing the overall temperature of the grinding balls and laying a good foundation for the subsequent water quenching steps.

[0044] When the high-chromium cast iron grinding balls are pre-cooled, the air-conducting air pipe 5 connected to the air-cooling pipe 15 introduces cold air into the curved air plate 51. The curved air plate 51 is attached to the top of the curved groove to pre-cool the high-chromium cast iron grinding balls during the rolling process. The cold air is evenly distributed in the curved air plate 51. Through its contact design with the curved groove, it is ensured that the high-chromium cast iron grinding balls can come into contact with the cold air flow in all directions during the rolling process. This design not only improves the pre-cooling effect, but also reduces the uneven cooling caused by excessive local temperature.

[0045] When the high-chromium cast iron grinding balls are water quenched and cooled in the water quenching cylinder 16, the spiral plate 6, together with multiple drop plates 62, is fixed on the inner wall of the water quenching cylinder 16. The high-chromium cast iron grinding balls can be water quenched around the spiral trajectory of the spiral plate 6. During the water quenching process, the balls can rise and fall once each time they encounter a drop plate 62, thereby improving the overall water quenching effect. After the grinding balls are water quenched, the water is discharged from the gap of the flow-blocking ring plate 61. The water can be cooled and circulated, and the grinding balls can be collected.

[0046] When the grinding balls in the heat exchange zone are cooled, multiple air vents 76 are opened on one side of the quenching and cooling box 1 for ventilation. As the output end of the servo motor 3 drives the first gear 31 to rotate, the third gear 71, which is smaller than the first gear 31, meshes and rotates rapidly. The third gear 71 drives the fan blades on the rotating rod 7 to quickly draw air in the air duct 73. The drawn air is sent to the air guide plate 75 through the guide air duct 74 and blown out. During the rolling of the high-chromium cast iron grinding balls in the heat exchange zone, the air dissipates some of the heat from the air vents 76, improving the cooling effect on the high-chromium cast iron grinding balls. When automatically quenching and cooling high-chromium cast iron grinding balls of different specifications, the temperatures of the pre-cooling zone and the rapid cooling zone need to be adjusted again. Temperature sensors are installed in the cold zone to monitor temperature changes. At this time, the second solenoid valve on the fixed cylinder 8 opens, and the electric slider 81 drives the sliding cylinder 82 to slide on the fixed cylinder 8. Then, the switching plate 83, which was originally misaligned and blocked by multiple perforated air ducts 84, slides and connects. Part of the air entering through the guide duct 74 passes through the fixed cylinder 8, sliding cylinder 82, and switching plate 83 and is sent into the multiple perforated air ducts 84. The air enters through the interior of the perforated air ducts 84 and through multiple oblique holes, expelling the cold air from the pre-cooling and rapid cooling zones, thereby increasing the temperature in the pre-cooling and rapid cooling zones. This method is suitable for automatic quenching and cooling of small-sized high-chromium cast iron grinding balls. When used for large-sized high-chromium cast iron grinding balls… During ball quenching and cooling, the No. 2 solenoid valve needs to be closed, and the perforated air duct 84 needs to be offset and blocked. The opening and closing of the No. 1 solenoid valve can be controlled to achieve adaptive temperature control cooling for high-chromium cast iron grinding balls of different specifications. When a small amount of cold air in the pre-cooling zone is discharged and recovered, the connecting plate 92 can slide synchronously with the switching plate 83 connected to the support frame 93, so that the switching plate 83 is connected to multiple perforated air ducts 84. The No. 1 return pipe 91 can also be connected to the connecting plate 92 and the air guide box 94. The cold air is discharged to the No. 1 air storage plate 9 through the three perforated air ducts 84, and then sent into the connected connecting plate 92 through the No. 1 return pipe 91. The cold air reaches the air guide box 94 through the connecting plate 92. The small amount of cold air emitted from the heat exchange zone can improve the cooling effect on the rolling grinding balls. When the cold air in the rapid cooling zone is recovered, the airflow in the two perforated air ducts 84 in the rapid cooling zone carries the cold air in the rapid cooling zone through the second air storage plate 95 into the second return pipe 96. Then, the second return pipe 96 sends the cold air to the cooling pipe 97 through the connecting plate 92. The cold air that passes through the cooling pipe 97 reaches the storage tank 2, where it can cool the water. This further regulates the temperature in the rapid cooling zone and improves the cooling effect. Through this design, not only can the cold air be effectively recovered, but it can also be used for temperature management in other areas, achieving energy saving and environmental protection.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quenching and cooling device for high-chromium cast iron grinding balls, characterized in that: The system includes a quenching and cooling box; a guide plate is fixedly connected to the inclined surface inside the quenching and cooling box, and the guide plate has a curved inclined groove; a sloping groove is formed at one end of the quenching and cooling box near the guide plate; a partition plate is fixedly connected to the guide plate; a cooler is fixedly connected to the outside of the quenching and cooling box; an air-cooling pipe is fixedly connected to the output end of the cooler, and the air-cooling pipe is fixedly connected to the partition plate, the air-cooling pipe has two output ends, and each output end is fixedly connected to a solenoid valve; a water quenching cylinder is rotatably connected to the quenching and cooling box near the sloping groove, and the inner wall of the water quenching cylinder is set as a slope; a water quenching mechanism is provided on the outside of the quenching and cooling box near the water quenching cylinder, the water quenching mechanism is used to drive the water quenching cylinder to rotate and water quench and cool the grinding balls; The water quenching mechanism includes a storage tank, a water inlet pipe, a nozzle, a water inlet trough, an arc-shaped plate, and a transmission assembly. The storage tank is fixed to the quenching cooling tank and positioned near the top of the water quenching cylinder. The water inlet pipe is fixed to one side of the storage tank. The nozzle is fixed to the bottom of the storage tank and is attached to the outer surface of the water quenching cylinder. Multiple water inlet troughs are formed on the water quenching cylinder, with the nozzles corresponding to the water inlet troughs. The arc-shaped plate is fixed to the quenching cooling tank and is attached to the outer surface of the water quenching cylinder. The transmission assembly is mounted on the quenching cooling tank and is used to drive the water quenching cylinder to rotate. The transmission assembly includes a servo motor, a first gear, and a second gear; the servo motor is fixedly connected to the quenching cooling box and is located near the water quenching cylinder; the first gear is fixedly connected to the output end of the servo motor; the second gear is sleeved on the water quenching cylinder, and the first gear can mesh with the second gear. A rotating rod is rotatably connected to the quenching cooling box, and a fan blade is fixedly connected to the rotating rod; a third gear is fixedly connected to the rotating rod, and the third gear can mesh with the first gear; a fixed frame is fixedly connected to the quenching cooling box; a wind duct is fixedly connected to the fixed frame, and the fan blade is located inside the wind duct; a guide duct is fixedly connected to the wind duct; a guide plate is fixedly connected to the end of the guide duct away from the wind duct, and the guide plate is located at the material guide plate; multiple air holes are opened on the quenching cooling box near the material guide plate; A fixed cylinder is fixedly connected to the air duct via a second solenoid valve; an electric slider is slidably connected to the fixed cylinder; a sliding cylinder is fixedly connected to the electric slider; a switching plate is fixedly connected to the sliding cylinder; multiple hollow air ducts are fixedly connected to the quenching cooling box, and one end of the hollow air duct is attached to the outer wall of the switching plate, and multiple oblique holes are opened on the hollow air duct.

2. The high-chromium cast iron grinding ball quenching and cooling device according to claim 1, characterized in that: Multiple side inclined plates are fixedly connected to the inner side of the curved inclined groove of the guide plate; multiple top inclined plates are fixedly connected to the bottom of the curved inclined groove of the guide plate; a heat exchange plate is fixedly connected to the guide plate, and the heat exchange plate is located inside the curved inclined groove; two heat exchange rods are fixedly connected to the heat exchange plate, the heat exchange plate and the heat exchange rods are made of metal, and the two heat exchange rods penetrate through the quenching cooling box.

3. The high-chromium cast iron grinding ball quenching and cooling device according to claim 1, characterized in that: A conductive air duct is fixedly connected to one of the output ends of the air-cooled pipe away from the refrigerator; a curved air plate is fixedly connected to the bottom of the conductive air duct, and the cross-sectional shape of the curved air plate corresponds to the curved inclined groove.

4. The high-chromium cast iron grinding ball quenching and cooling device according to claim 1, characterized in that: The inner wall of the water quenching cylinder is fixedly connected to a spiral plate; the end of the water quenching cylinder away from the quenching cooling box is fixedly connected to a flow-blocking ring plate; and multiple drop plates are fixedly connected to the inner wall of the water quenching cylinder.

5. The high-chromium cast iron grinding ball quenching and cooling device according to claim 1, characterized in that: A No. 1 air storage plate is fixedly connected to one end of the three hollowed-out air ducts away from the switching plate; a No. 1 return pipe is fixedly connected to the No. 1 air storage plate; a support frame is fixedly connected to the switching plate; a connecting plate is fixedly connected to one end of the support frame away from the switching plate, and the connecting plate can slide and communicate with the No. 1 return pipe; an air guide box is fixedly connected to the partition plate, and the connecting plate is slidably connected to the inner wall of the air guide box.

6. The high-chromium cast iron grinding ball quenching and cooling device according to claim 5, characterized in that: A second air storage plate is fixedly connected to the two hollowed-out air ducts; a second return pipe is fixedly connected to the second air storage plate, and a connecting plate can slide and connect with the second return pipe; a cooling pipe is fixedly connected to the storage box, and the cooling pipe and the second return pipe are arranged opposite to each other.

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