A cooling device for large shaft products

Abstract

This utility model discloses a cooling device for large shaft products, relating to the field of large shaft products. It includes a base, with two sets of cooling plates connected to the top of the base. Two sets of exhaust grooves are formed on the outer wall of each cooling plate. An air inlet pipe and a water inlet pipe are installed at one end of each cooling plate. Three sets of nozzles are connected to the end of each set of water grooves. Three sets of convex rings are fixed to the inner wall of each cooling plate, and two sets of air jet pipes are provided on the outer wall of each convex ring. This utility model solves the problem of uneven cooling that easily occurs when large shaft products are cooled by water in a pool. When the shaft is placed on top of a support wheel, the nozzles inside the cooling plate slowly cool the high-temperature wall surface of the shaft by spraying water. Furthermore, the gas ejected from the air jet pipes not only blows away the water vapor formed around the shaft but also increases the cooling rate of the shaft surface, reducing the temperature difference in the internal structure of the high-temperature shaft during the cooling process.

Description

Technical Field

[0001] This utility model relates to the field of large shaft products, specifically a cooling device for large shaft products. Background Technology

[0002] Large shaft products are core load-bearing components in mechanical transmission systems and heavy equipment. They are widely used in energy, rail transportation, mining machinery and shipbuilding. They usually have large dimensions and are made of high-strength alloy steel, high-quality carbon steel (and special heat-resistant alloys). They mainly serve to transmit torque, support rotating parts and bear heavy loads and impact loads.

[0003] The production process of large shaft products requires multiple precision procedures to ensure that their mechanical properties and precision meet the usage requirements. After the shaft body completes the quenching operation, it is in a high-temperature state and must be cooled in time to promote the transformation of austenite into martensite or bainite, thereby strengthening the material. Currently, the most common way in the industry to cool large shaft bodies after high-temperature quenching is to directly immerse the shaft body in a large water tank for cooling.

[0004] To avoid severe impact when the shaft comes into contact with cold water, operators usually use hoisting equipment to slowly lower the shaft into the water tank. However, during the slow descent, the parts of the shaft that come into contact with the water first cool down rapidly, while the parts that do not come into contact with the water remain at a high temperature. This results in a large temperature gradient between different areas of the shaft. This drastic temperature difference generates uneven thermal stress inside the shaft. Rapid local cooling also causes uneven hardness distribution inside the shaft, making it unable to meet the design load-bearing requirements. Ultimately, this significantly reduces the production qualification rate and subsequent reliability of large shaft products. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a cooling device for large shaft products to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cooling device for large shaft products, comprising a base, a water collection groove at the top of the base, two sets of rotating rods installed inside the water collection groove, multiple sets of support wheels installed on the outer wall of the rotating rods, two sets of cooling plates connected to the top of the base, two sets of exhaust grooves on the outer wall of the cooling plates, an air inlet pipe and a water inlet pipe installed at one end of the cooling plates, a first connecting pipe and a second connecting pipe respectively connected to the ends of the air inlet pipe and the water inlet pipe, and the first connecting pipe and the second connecting pipe penetrating the interior of the cooling plates, three sets of water passage grooves inside the cooling plates, three sets of nozzles connected to the end of each set of water passage grooves, three sets of convex rings fixed on the inner wall of the cooling plates, two sets of air jet pipes provided on the outer wall of each set of convex rings, and three sets of air vents inside the cooling plates, with each set of air vents communicating with the air jet pipes.

[0007] By adopting the above technical solution, the problem of uneven cooling that easily occurs when large shaft products are cooled by water in a water tank is solved. When the shaft is placed on top of the support wheel, the nozzles inside the cooling plate slowly cool the high-temperature wall surface of the shaft by spraying water. In addition, the gas sprayed from the jet pipe can not only blow away the water vapor formed around the shaft, but also increase the cooling speed of the shaft surface and reduce the temperature difference of the internal structure of the high-temperature shaft during the cooling process.

[0008] The present invention is further configured such that the jet pipe is inclined at an angle of 45 degrees.

[0009] Preferably, the gas ejected from the jet pipe can blow away the water vapor around the shaft through the exhaust slots on the cooling plate, thereby reducing the ambient temperature of the space surrounded by the base and the two sets of cooling plates.

[0010] The present invention is further configured such that the water inside the nozzle is sprayed out in a spraying manner, and the radius of the area sprayed by the nozzle is greater than the distance between two sets of adjacent nozzles.

[0011] Preferably, the nozzle slowly cools the high-temperature wall surface of the shaft by spraying water, and the spraying range of the nozzle can completely cover the top of the shaft.

[0012] The present invention is further configured such that connecting columns are fixed on both sides of the end of the cooling plate, and the connecting columns are disposed inside the base.

[0013] Preferably, the two sets of cooling plates mounted on the top of the base can be flipped, so that the shaft can be placed above the support wheel by a lifting device.

[0014] The present invention is further configured such that a stepper motor is installed at the end of the set of rotating rods, and a shaft is placed on the top of the support wheel.

[0015] Preferably, the stepper motor drives the support wheel to rotate via a rotating rod connected to its end, thereby causing the shaft to rotate.

[0016] The present invention is further configured such that fixing plates are fixed at both ends of the base, a hydraulic cylinder is fixedly installed on the outer wall of the fixing plate, a drive rod is fixed at the end of the hydraulic cylinder, and a fixing block is provided on the outer wall of the cooling plate.

[0017] Preferably, when the hydraulic cylinder extends or retracts, the hydraulic cylinder can drive the cooling plate to flip through the drive rod fixed at its end.

[0018] The present invention is further configured such that a groove is provided inside the fixing block, and the diameter of the groove is larger than the diameter of the driving rod.

[0019] Preferably, when the hydraulic cylinder retracts, the drive rod can cause the cooling plate to flip via the fixed block.

[0020] The present invention is further provided that a drain hole is provided on one side of the inner wall of the water collection tank, and the drain hole penetrates the base.

[0021] Preferably, the sprayed water will collect in a water collection tank inside the base and be discharged from the drain hole.

[0022] In summary, the present invention has the following main advantages: 1. This utility model solves the problem of uneven cooling of large shaft products when cooled by water in a pool by setting up a base, cooling plate, water inlet pipe, air inlet pipe, jet pipe, convex ring, and nozzle. When the shaft is placed on top of the support wheel, the nozzle inside the cooling plate slowly cools the high-temperature wall surface of the shaft by spraying water. In addition, the gas sprayed by the jet pipe can not only blow away the water vapor formed around the shaft, but also increase the cooling speed of the shaft surface and reduce the temperature difference of the internal structure of the high-temperature shaft during the cooling process.

[0023] 2. This utility model solves the problem of uneven cooling of the shaft by setting a stepper motor, a rotating rod and a support wheel. Before the shaft is cooled by water, the stepper motor drives the rotating rod connected to its end to rotate. The rotating rod drives the shaft to rotate through the support wheel installed on the outer wall of the rotating rod. The rotating shaft can fully and evenly contact the water sprayed by the nozzle, so that the outer wall of the shaft can be cooled evenly. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall device of this utility model; Figure 2 This is a schematic diagram showing the cooling plate of this utility model when opened; Figure 3This is a schematic diagram of the inner wall of the cooling plate of this utility model; Figure 4 This is a schematic diagram of the water channel connection of this utility model; Figure 5 This is a schematic diagram of the ventilation groove connection of this utility model.

[0025] Explanation of reference numerals in the attached figures: 1. Base; 101. Water collection tank; 102. Stepper motor; 103. Rotating rod; 104. Support wheel; 105. Drain hole; 2. Cooling plate; 201. Exhaust trough; 202. Connecting column; 203. Air inlet pipe; 204. First connecting pipe; 205. Convex ring; 206. Jet pipe; 207. Ventilation trough; 208. Water inlet pipe; 209. Second connecting pipe; 210. Water passage trough; 211. Nozzle; 3. Fixing block; 301. Slide groove; 302. Drive rod; 303. Hydraulic cylinder; 304. Fixing plate; 4. Shaft. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The embodiments of this utility model will be described below based on its overall structure.

[0028] Please see Figure 1 — Figure 5The system includes a base 1, with a water collection tank 101 on its top. Two sets of rotating rods 103 are installed inside the water collection tank 101, and multiple sets of support wheels 104 are installed on the outer wall of the rotating rods 103. Two sets of cooling plates 2 are connected to the top of the base 1. Two sets of exhaust channels 201 are provided on the outer wall of the cooling plates 2. An air inlet pipe 203 and a water inlet pipe 208 are installed at one end of each cooling plate 2. A first connecting pipe 204 and a second connecting pipe 209 are respectively connected to the ends of the air inlet pipe 203 and the water inlet pipe 208, and the first connecting pipe 204 and the second connecting pipe 209 penetrate the interior of the cooling plate 2. Three sets of water passage channels 210 are provided inside the cooling plate 2, and three sets of nozzles 211 are connected to the end of each set of water passage channels 210. Three sets of convex rings 205 are fixed on the inner wall of the cooling plate 2. Two sets of jet pipes 206 are provided on the outer wall of each set of convex rings 205. Three sets of ventilation grooves 207 are opened inside the cooling plate 2, and each set of ventilation grooves 207 is connected to the jet pipes 206. This solves the problem of uneven cooling that easily occurs when large shaft products are cooled by water in a water tank. When the shaft 4 is placed on top of the support wheel 104, the nozzles 211 inside the cooling plate 2 slowly cool the high-temperature wall surface of the shaft 4 by spraying water. In addition, the gas sprayed by the jet pipes 206 can not only blow away the water vapor formed around the shaft 4, but also increase the cooling speed of the surface of the shaft 4 and reduce the temperature difference of the internal structure of the high-temperature shaft 4 during the cooling process.

[0029] For details regarding the above embodiments, please refer to [link / reference]. Figure 5 The jet pipe 206 is tilted at an angle of 45 degrees. The gas ejected from the jet pipe 206 can blow away the water vapor around the shaft 4 through the exhaust groove 201 on the cooling plate 2, thereby reducing the ambient temperature of the space surrounded by the base 1 and the two sets of cooling plates 2.

[0030] For details regarding the above embodiments, please refer to [link / reference]. Figure 3 The water inside the nozzle 211 is sprayed out in a spraying manner. The radius of the area sprayed by the nozzle 211 is larger than the distance between two sets of adjacent nozzles 211. The nozzle 211 slowly cools the high-temperature wall surface of the shaft 4 by spraying water, and the spraying range of the nozzle 211 can completely cover the top of the shaft 4.

[0031] For details regarding the above embodiments, please refer to [link / reference]. Figure 3 and Figure 4 The cooling plate 2 has connecting columns 202 fixed on both sides of its end, and the connecting columns 202 are located inside the base 1. The two sets of cooling plates 2 installed on the top of the base 1 can be flipped, so that the shaft 4 can be placed above the support wheel 104 by the hanger.

[0032] For details regarding the above embodiments, please refer to [link / reference]. Figure 2A stepper motor 102 is installed at the end of a set of rotating rods 103, and a shaft 4 is placed on the top of the support wheel 104. The stepper motor 102 drives the support wheel 104 to rotate through the rotating rods 103 connected to its end, thereby driving the shaft 4 to rotate.

[0033] For details regarding the above embodiments, please refer to [link / reference]. Figure 2 Both ends of the base 1 are fixed with fixing plates 304. A hydraulic cylinder 303 is fixedly installed on the outer wall of the fixing plate 304. A drive rod 302 is fixed at the end of the hydraulic cylinder 303. A fixing block 3 is provided on the outer wall of the cooling plate 2. When the hydraulic cylinder 303 extends or retracts, the hydraulic cylinder 303 can drive the cooling plate 2 to flip through the drive rod 302 fixed at its end.

[0034] For details regarding the above embodiments, please refer to [link / reference]. Figure 1 The fixed block 3 has a groove 301 inside, and the diameter of the groove 301 is larger than the diameter of the drive rod 302. When the hydraulic cylinder 303 retracts, the drive rod 302 can drive the cooling plate 2 to flip through the fixed block 3.

[0035] For details regarding the above embodiments, please refer to [link / reference]. Figure 2 A drain hole 105 is provided on one side of the inner wall of the water collection tank 101, and the drain hole 105 penetrates the base 1. The sprayed water will be collected in the water collection tank 101 inside the base 1 and discharged from the drain hole 105.

[0036] In practical operation, when the shaft 4 needs to be cooled, the operator first controls the hydraulic cylinders 303 on both sides of the base 1 to retract through the control box on one side of the base 1. During the retraction of the hydraulic rods connected to the ends of the hydraulic cylinders 303, the drive rods 302 connected to the ends of the hydraulic cylinders 303 slide in the grooves 301 inside the fixed block 3, causing the fixed block 3 to drive the cooling plates 2 to rotate around the connecting column 202 as the center, thereby causing the two sets of cooling plates 2 at the top of the base 1 to flip open to both sides. Then, the shaft 4 is lifted by a hoist and placed on the top of the support wheel 104. When the shaft 4 is placed smoothly on the top of the base 1, the hydraulic cylinders 303 push the drive rods 302 connected to their ends to extend in the direction of the base axis, so that the drive rods 302 slide in the grooves 301 inside the fixed block 3, thereby pushing and flipping the cooling plates 2 to cover the top of the base 1. The water inlet pipe 208 and air inlet pipe 203 at one end of the cooling plate 2 are respectively connected to the water supply equipment and the air supply equipment. The water inlet pipe 208 delivers water to the second connecting pipe 209. The second connecting pipe 209 flows through three sets of water channels 210 inside the cooling plate 2. The water inside the water channels 210 is sprayed outward through the nozzles 211 installed at the ends of the water channels 210. Multiple sets of nozzles 211 on the inner walls of the two sets of cooling plates 2 spray water onto the surface of the shaft 4 in a semi-circular area above the shaft 4, thereby achieving slow cooling of the surface of the shaft 4 by the water. Before the nozzles 211 spray water, the stepper motor 102 drives the rotating rod 103 connected to its end to rotate, so that the rotating rod 103 is supported by a support installed on the outer wall of the rotating rod 103. The support wheel 104 drives the shaft 4 to rotate, so that the outer wall of the shaft 4 can be cooled evenly. During the spraying of water by the nozzle 211, the air supply device delivers gas to the first connecting pipe 204 through the air inlet pipe 203. The gas inside the first connecting pipe 204 flows through the ventilation groove 207 inside the cooling plate 2 to the jet pipe 206 installed on the outer wall of the convex ring 205. The gas is sprayed out from the jet pipe 206 at an angle of 45 degrees to the surface of the shaft 4. When the water is sprayed onto the high-temperature wall surface of the shaft 4, the water will quickly vaporize to produce water vapor. The gas sprayed from the jet pipe 206 can blow away the water vapor around the shaft 4 through the exhaust groove 201 on the cooling plate 2, thereby reducing the ambient temperature of the space surrounded by the base 1 and the two sets of cooling plates 2.

[0037] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A cooling device for large shaft products, comprising a base (1), characterized in that: The top of the base (1) is provided with a water collection tank (101), and two sets of rotating rods (103) are installed inside the water collection tank (101). Multiple sets of support wheels (104) are installed on the outer wall of the rotating rods (103). The top of the base (1) is connected to two sets of cooling plates (2). The outer wall of the cooling plates (2) is provided with two sets of exhaust grooves (201). One end of the cooling plate (2) is provided with an air inlet pipe (203) and a water inlet pipe (208). The ends of the air inlet pipe (203) and the water inlet pipe (208) are respectively connected to a first connecting pipe (204) and a second connecting pipe. The pipe (209) is connected to the cooling plate (2), and the first connecting pipe (204) and the second connecting pipe (209) penetrate the interior of the cooling plate (2). The interior of the cooling plate (2) is provided with three sets of water channels (210). The end of each set of water channels (210) is connected to three sets of nozzles (211). The inner wall of the cooling plate (2) is fixed with three sets of convex rings (205). The outer wall of each set of convex rings (205) is provided with two sets of jet pipes (206). The interior of the cooling plate (2) is provided with three sets of air channels (207), and each set of air channels (207) is connected to the jet pipes (206).

2. A cooling device for large shaft products according to claim 1, characterized in that: The jet pipe (206) is inclined, and the inclination angle is set to 45 degrees.

3. A cooling device for large shaft products according to claim 1, characterized in that: The water inside the nozzle (211) is sprayed out in a spraying manner, and the radius of the area sprayed by the nozzle (211) is greater than the distance between two sets of adjacent nozzles (211).

4. A cooling device for large shaft products according to claim 1, characterized in that: The cooling plate (2) has connecting columns (202) fixed on both sides of its end, and the connecting columns (202) are located inside the base (1).

5. A cooling device for large shaft products according to claim 1, characterized in that: A stepper motor (102) is installed at the end of the set of rotating rods (103), and a shaft (4) is placed on the top of the support wheel (104).

6. A cooling device for large shaft products according to claim 1, characterized in that: Both ends of the base (1) are fixed with fixing plates (304), and a hydraulic cylinder (303) is fixedly installed on the outer wall of the fixing plate (304). A drive rod (302) is fixed at the end of the hydraulic cylinder (303), and a fixing block (3) is provided on the outer wall of the cooling plate (2).

7. A cooling device for large shaft products according to claim 6, characterized in that: The fixed block (3) has a groove (301) inside, and the diameter of the groove (301) is larger than the diameter of the drive rod (302).

8. A cooling device for large shaft products according to claim 1, characterized in that: A drain hole (105) is provided on one side of the inner wall of the water collection tank (101), and the drain hole (105) passes through the base (1).

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