Rapid cooling device for casting parts

Abstract

The invention belongs to the technical field of casting, and particularly provides a casting part rapid cooling device which comprises a cooling device, the interior of the cooling device is divided into a first cooling chamber and a second cooling chamber through a partition plate, a conveying assembly is arranged in the cooling device in the horizontal direction, and the feeding end of the conveying assembly is located on one side of the first cooling chamber; a first nozzle group is arranged at the top of the first cooling chamber, the liquid inlet end of the first nozzle group is communicated to a water supply system through a pipeline, a first liquid collecting tank with a first water outlet is arranged at the bottom of the first cooling chamber, the first water outlet is communicated to a mixing tank, and the mixing tank is further communicated with an ethanol storage tank; a water outlet of the mixing tank is communicated to a second spray head group arranged at the top of the second cooling chamber, a second exhaust hole is formed in one side of the second cooling chamber and is communicated to the induced draft fan through an air duct, a second liquid collecting tank with a second water outlet is formed in the bottom of the second cooling chamber, and the second water outlet is communicated to the liquid storage tank. By means of the arrangement, fractional cooling can be achieved, and casting damage caused by chilling is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of casting, and particularly relates to a rapid cooling device for castings. Background Art

[0002] Casting is a method of pouring liquid metal into a casting cavity adapted to the shape of a part, and waiting for it to cool and solidify to obtain a part or blank. The casting obtained by the casting method is called a casting, and the casting needs to be cooled during the processing and forming process.

[0003] Some castings are provided with holes and channels. If they are suddenly cooled rapidly, the holes and channels will shrink significantly, and even cracks may appear on the side, causing the castings to be damaged and unable to be processed and used in the next step. Summary of the Invention

[0004] In view of the above defects, the present invention provides a rapid cooling device for castings, which can cool in batches to prevent the castings from being damaged due to rapid cooling.

[0005] To achieve the above object, the present invention provides the following technical solution: A rapid cooling device for castings, including a cooling device. The interior of the cooling device is separated into a first cooling chamber and a second cooling chamber by a partition. A conveying component is arranged horizontally in the cooling device. The feeding end of the conveying component is located on one side of the first cooling chamber. A first spray head group is arranged at the top of the first cooling chamber. The liquid inlet end of the first spray head group is connected to a water supply system through a pipeline. A first liquid collecting tank with a first water outlet is arranged at the bottom of the first cooling chamber. The first water outlet is connected to a mixing tank. The mixing tank is also connected to an ethanol storage tank. The water outlet of the mixing tank is connected to a second spray head group arranged at the top of the second cooling chamber. A second exhaust hole is opened on one side of the second cooling chamber. The second exhaust hole is connected to an induced draft fan through a duct. A second liquid collecting tank with a second water outlet is arranged at the bottom of the second cooling chamber. The second water outlet is connected to a liquid storage tank.

[0006] As a further improvement of the present invention, a row of air supply holes is arranged on one side inside the first cooling chamber. The air inlet end of the air supply holes is connected to an air supply system through a duct. A row of first exhaust holes is arranged on the opposite side of the air supply holes inside the first cooling chamber. The first exhaust holes are connected to the outside through a duct.

[0007] As a further improvement of the present invention, the first spray head group is composed of several first spray heads, and the first spray heads are water curtain spray heads.

[0008] As a further improvement of the present invention, a number of air supply fans are arranged in an array at the top of the second cooling chamber. The air inlet end of the air supply fans is connected to an air supply system.

[0009] As a further improvement of the present invention, the second nozzle group is composed of a plurality of second nozzles, and the second nozzles are droplet nozzles.

[0010] As a further improvement of the present invention, the liquid inlet of the mixing tank is provided with a regulating valve, which controls the primary cooling water discharged from the first water outlet and the ethanol supplied from the ethanol storage tank to be mixed in a volume ratio of 6:1.

[0011] As a further improvement of the present invention, the air outlet end of the induced draft fan is connected to the air inlet of the condenser, and the liquid outlet of the condenser is connected to the liquid collecting tank.

[0012] As a further improvement of the present invention, the driving device of the conveying assembly is arranged on the feeding end side.

[0013] Beneficial effects of the present invention: 1. By setting up the first cooling chamber and the second cooling chamber and forming different degrees of cooling conditions in the cooling chamber, segmented secondary cooling is achieved to prevent the castings from shrinking, cracking and other negative effects caused by rapid cooling, and ensure the yield of the castings after cooling.

[0014] 2. In the second cooling chamber, an ethanol mixture, combined with droplet spray and swirling airflow, forms a liquid film on the casting surface. This ethanol mixture, due to the azeotropic effect, has a lower boiling point than cooling water, making it more susceptible to boiling phase transitions, rapidly removing significant amounts of heat and achieving final cooling. Simultaneously, any vapors formed are promptly expelled through exhaust vents, ensuring that the ethanol concentration in the operating environment remains below the lower explosive limit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the rapid cooling device for castings of the present invention; Figure 2 It is an axonometric diagram of the cooling device; Figure 3 It is a schematic diagram of the internal structure of the cooling device; Figure 4 2 is a schematic diagram of the internal structure of the first cooling chamber; Figure 5 It is a schematic diagram of the internal structure of the second cooling chamber.

[0016] In the figure: 1 - water supply system, 2 - cooling device, 200 - first spray head group, 201 - first cooling chamber, 202 - air supply hole, 203 - air supply fan, 204 - second cooling chamber, 205 - second spray head group, 206 - conveying component, 207 - first liquid collecting tank, 208 - second liquid collecting tank, 209 - partition board, 210 - second exhaust hole, 211 - second liquid collecting tank, 212 - second water outlet, 213 - first liquid collecting tank, 214 - first exhaust hole, 215 - first water outlet; 3 - air supply system, 4 - liquid collecting tank, 5 - condenser, 6 - ethanol storage tank, 7 - mixing tank, 8 - liquid storage tank. Detailed implementation manner

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific examples described herein are only used to explain the present invention and are not used to limit the present invention. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only with reference to the direction of the accompanying drawings. Therefore, the directional terms used are for illustration and not for limiting the present invention. In addition, in all embodiments, the same reference numerals represent the same elements.

[0018] Please refer to Figures 1 to 5 , the present invention provides a rapid cooling device for castings, including a water supply system 1, a cooling device 2, and an air supply system 3. The water supply system 1 is provided with a water supply pump, and the output end of the water supply pump is communicated with the cooling device 2.

[0019] As a further explanation of this embodiment, the cooling water can be transported to the cooling device 2 through the water supply system 1.

[0020] The cooling device 2 includes a chassis. A vertical partition board 209 is provided in the middle of the chassis, and the partition board 209 divides the chassis into a first cooling chamber 201 and a second cooling chamber 204.

[0021] A communication port is provided in the middle of the partition board 209, and a conveying component 206 is arranged horizontally along the chassis. The middle of the conveying component 206 passes through the communication port. Both ends of the conveying component 206 extend out of the chassis. The feeding end of the conveying component 206 is located on one side of the first cooling chamber 201, and the discharging end of the conveying component 206 is located on one side of the second cooling chamber 204. A driving device is provided at the feeding end of the conveying component 206.

[0022] The top of the first cooling chamber 201 is provided with a first spray head group 200, which is composed of a number of first spray heads. The first spray heads are uniformly and arrayedly fixedly connected above the first cooling chamber 201. The first spray heads are water curtain spray heads and can form a continuous water curtain.

[0023] The liquid inlet end of the first spray head group 200 is connected to the water supply pump of the water supply system 1 through a pipeline, and the liquid outlet end of the first spray head group 200 faces the casting on the conveying component 206 in the first cooling chamber 201.

[0024] In the first cooling chamber 201, an array of air supply holes 202 is arranged along one side in its horizontal direction. The air inlet ends of the air supply holes 202 are all connected to the air supply system 3 through air ducts. The air outlet ends of the air supply holes 202 face the casting on the conveying component 206. On the side opposite to the side where the air supply holes 202 are arranged in the first cooling chamber 201, an array of symmetrically distributed first exhaust holes 214 is provided. Each first exhaust hole 214 is connected to the outside through an air duct.

[0025] As a further explanation of this embodiment, the air supply system 3 conveys cold air to the first cooling chamber 201, and its intensity does not affect the flow direction of the water curtain. By using air cooling and water cooling in cooperation to reduce the temperature, the temperature of the casting can be quickly reduced. At the same time, the cold air can take away the evaporated water vapor and be discharged through the first exhaust holes 214, reducing the temperature in the first cooling chamber 201 and further improving the cooling speed.

[0026] A first liquid collection tank 207 is arranged below the conveying component 206 in the first cooling chamber 201. A first water outlet 215 is arranged at the center of the bottom of the first liquid collection tank 207. The first water outlet 215 is connected to the liquid inlet end of the first liquid delivery pump through a pipeline, and the liquid outlet end of the first liquid delivery pump is connected to the first liquid inlet of the mixing tank 7 through a pipeline.

[0027] As a further explanation of this embodiment, the water supply pump of the water supply system 1 supplies cooling water to the first spray head group 200. The first spray head group 200 sprays the cooling water onto the casting on the conveying component 206. The cooling water falls on the casting for cooling. After passing through the casting, the temperature of the cooling water rises and falls into the first liquid collection tank 207 at the bottom of the first cooling chamber 201, and then is discharged from the first water outlet 215 and sent to the first liquid inlet of the mixing tank 7 through the first liquid delivery pump and enters the mixing tank 7.

[0028] The mixing tank 7 is also provided with a second liquid inlet, and the second liquid inlet is connected to the liquid outlet end of the ethanol storage tank 6. Proportion regulating valves are arranged at the first liquid inlet and the second liquid inlet to control the mixing of the primary cooling water discharged from the first water outlet and the ethanol supplied by the ethanol storage tank 6 at a volume ratio of 6:1. A liquid supply pump is provided at the liquid outlet of the mixing tank 7. The liquid inlet end of the liquid supply pump is connected to the liquid outlet of the mixing tank 7, and the liquid outlet end of the liquid supply pump is connected to the cooling device 2 through a pipeline.

[0029] As a further explanation of this embodiment, the temperature of the primary cooling water derived from the first cooling chamber 201 can still be used for secondary cooling of the casting. High-purity ethanol is flammable. By mixing with the first cooling water in the mixing tank 7, its concentration is diluted. At the same time, the ethanol can be heated up through mixing to prevent the pure ethanol solution from burning due to excessive temperature difference when contacting the casting, which may cause danger. At the same time, the pure ethanol solution absorbs less heat, while the mixed solution absorbs more heat.

[0030] At the top of the second cooling chamber 204 of the cooling device 2, a second spray head group 205 is provided. The second spray head group 205 is composed of a number of second spray heads, and the second spray heads are evenly arrayed and fixed above the second cooling chamber 204. The second spray heads are droplet spray heads, which can form intermittent droplets falling onto the casting.

[0031] A number of air supply fans 203 are arrayed at the top of the second cooling chamber 204. The air inlet ends of the air supply fans 203 are communicated with the air supply system 3, and the air outlet ends of the air supply fans 203 are vertically downward, facing the conveying component 206 in the second cooling chamber 204.

[0032] A second exhaust hole 210 is opened on one side of the second cooling chamber 204. The second exhaust hole 210 is communicated with the air inlet end of the induced draft fan through a duct. The air outlet end of the induced draft fan is communicated with the air inlet of the condenser 5 through a pipeline, and the liquid outlet of the condenser 5 is communicated with the liquid collection tank 4.

[0033] As a further explanation of this embodiment, the ethanol mixed solution is sprayed onto the casting on the conveying component 206 through the second spray heads. There is some cooling water remaining on the casting. When the ethanol mixed solution is sprayed onto the casting, it is mixed with the cooling water by the rotating air flow generated by the air supply fan 203. After mixing, a mixed solution is formed. Due to the presence of ethanol in the mixed solution, its boiling point is reduced, and it is more likely to undergo boiling phase change, thereby taking away a large amount of heat and achieving rapid secondary cooling.

[0034] A second liquid collection tank 208 is arranged below the conveying component 206 in the second cooling chamber 204. A second water outlet 212 is opened at the center of the bottom of the second liquid collection tank 208. The second water outlet 212 is communicated with the liquid inlet end of the second liquid delivery pump through a pipeline, and the liquid outlet end of the second liquid delivery pump is communicated with the liquid storage tank 8 through a pipeline.

[0035] The working principle and usage process of this embodiment: The casting is fed into the machine case from the feeding end of the conveying component 206. The casting first enters the first cooling chamber 201. At the same time, the water supply pump of the water supply system 1 is started to supply cooling water to the first spray head group 200. The cooling water is sprayed onto the casting from the first spray heads in the form of a continuous water curtain, so that the casting is cooled down and the heat is taken away. Then it enters the second cooling chamber 204. Part of the cooling water will evaporate into water vapor, and the cold air blown in through the air supply hole 202 is blown to the exhaust hole and then discharged.

[0036] Part of the cooling water is heated up by the casting, forms primary cooling water and falls into the first liquid collection tank 207, and is discharged from the first water outlet 215, and is sent into the mixing tank 7 through the first liquid delivery pump. The primary cooling water is fully mixed with the ethanol introduced into the mixing tank 7 to form an ethanol mixture.

[0037] The ethanol mixture is sent to the second spray head group 205, and mist droplets are sprayed out by the second spray head. The mist droplets are sprayed onto the casting in the second cooling chamber 204, and are mixed with the cooling water remaining on the casting through the rotating air flow formed by the top air supply fan 203. The boiling point of the formed ethanol mixture azeotrope is reduced, so that boiling phase change is more likely to occur and can be further accelerated, and the secondary cooling temperature is reduced to a lower level.

[0038] The vapor formed by the phase change contains ethanol, and needs to be quickly discharged from the exhaust holes of the second cooling chamber 204 through an induced draft fan, re-condensed into a liquid through the condenser 5, and then sent into the liquid collection tank 4 for subsequent treatment. The unevaporated mixture falls into the second liquid collection tank 208 and is discharged from the second water outlet 212, and is sent into the storage tank 8 through the second liquid delivery pump.

[0039] The above is only the preferred implementation mode of the present invention. The protection scope of the present invention is not limited to the above implementation measures. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art of this technology, several improvements and refinements made without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A rapid cooling device for castings, characterized in that, It includes a cooling device (2), inside which is divided into a first cooling chamber (201) and a second cooling chamber (204) by a partition plate (209). A conveying assembly (206) is arranged horizontally in the cooling device (2). The feeding end of the conveying assembly (206) is located on one side of the first cooling chamber (201). A first spray head group (200) is arranged at the top of the first cooling chamber (201). The liquid inlet end of the first spray head group (200) is connected to a water supply system (1) through a pipeline. A first liquid collecting tank (207) with a first water outlet (215) is arranged at the bottom of the first cooling chamber (201). The first water outlet (215) is connected to a mixing tank (7). The mixing tank (7) is also connected to an ethanol storage tank (6). The water outlet of the mixing tank (7) is connected to a second spray head group (205) arranged at the top of the second cooling chamber (204). A second exhaust hole (210) is opened on one side of the second cooling chamber (204). The second exhaust hole (210) is connected to an induced draft fan through a duct. A second liquid collecting tank (208) with a second water outlet (212) is arranged at the bottom of the second cooling chamber (204). The second water outlet (212) is connected to a liquid storage tank (8).

2. The rapid cooling device for castings according to claim 1, characterized in that, On one side inside the first cooling chamber (201), air supply holes (202) are arranged in an array. The air inlet end of the air supply holes (202) is connected to an air supply system (3) through a duct. On the opposite side of the air supply holes (202) inside the first cooling chamber (201), first exhaust holes (214) are arranged in an array. The first exhaust holes (214) are connected to the outside through a duct.

3. The rapid cooling device for castings according to claim 1, characterized in that, The first spray head group (200) is composed of a number of first spray heads, and the first spray heads are water curtain spray heads.

4. The rapid cooling device for castings according to claim 1, characterized in that, A number of air supply fans (203) are arranged in an array at the top of the second cooling chamber (204). The air inlet end of the air supply fans (203) is connected to an air supply system (3).

5. The rapid cooling device for castings according to claim 1, characterized in that, The second spray head group (205) is composed of a number of second spray heads, and the second spray heads are droplet spray heads.

6. The rapid cooling device for castings according to claim 1, characterized in that, Regulating valves are arranged at the liquid inlet of the mixing tank (7), which control the mixing of the primary cooling water discharged from the first water outlet and the ethanol supplied by the ethanol storage tank (6) at a volume ratio of 6:

1.

7. The rapid cooling device for the casting according to claim 1, wherein, The air outlet end of the induced draft fan is connected to the air inlet of a condenser (5), and the liquid outlet of the condenser (5) is connected to a liquid collecting tank (4).

8. The rapid cooling device for castings according to claim 1, characterized in that, The driving device of the conveying assembly (206) is arranged on one side of the feeding end.

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