A kind of falling sand cooling equipment for casting

Abstract

The present application relates to a sand-falling cooling device for casting, which belongs to the technical field of molding sand recovery, and includes a cooling box chamber, the cooling box chamber is provided with an air supply port and an air exhaust port, the cooling box chamber is provided with a vibrating sand spreading device, the vibrating sand spreading device includes a vibrating table, a central cooling pipe arranged on the vibrating table, and a spiral disk coiled on the central cooling pipe, the central cooling pipe is vertically arranged and closed at both ends, a water cooling device is arranged in the central cooling pipe, a sand-falling chassis is also arranged on the central cooling pipe, the sand-falling chassis is arranged on the lower side of the spiral disk, and a sand outlet is arranged on the sand-falling chassis. The present application spreads the falling sand on the spiral disk through the vibrating sand spreading device, and promotes the rapid cooling of the falling sand through a combination of water cooling and air cooling, thereby improving the cooling efficiency of the casting sand.

Description

Technical Field

[0001] The present application relates to the field of molding sand recovery, and in particular to a sand falling cooling device for casting. Background Art

[0002] On the lost foam production line, after the foundry sand is peeled off from the ingot, it needs to be crushed, screened and cooled before it can be used again. Among them, the hot sand has a very high temperature, and usually forced cooling is required to quickly reduce its temperature to meet the requirements of improving casting efficiency.

[0003] In the current process, there are three ways to cool foundry sand: 1. The disadvantages of traditional natural stacking cooling are that it occupies a poor space, is difficult to manage, and has a very slow cooling speed, which has basically been eliminated by various foundries; 2. Fluidized bed and boiling bed cooling are used. These cooling beds not only occupy a large area and are expensive, but also have a single cooling method and low cooling efficiency. They cannot be used to cool round sand, which is far behind the development of casting technology and has become one of the main problems plaguing the casting industry. Summary of the invention

[0004] In order to accelerate the cooling of falling sand and improve the cooling efficiency of casting sand, the present application provides a falling sand cooling device for casting.

[0005] The present application provides a casting sand cooling device, which adopts the following technical solution:

[0006] A sand dropping cooling equipment for casting comprises a cooling box chamber, wherein the cooling box chamber is provided with an air supply port and an air exhaust port, wherein a vibrating sand spreading device is arranged in the cooling box chamber, wherein the vibrating sand spreading device comprises a vibrating table, a central cooling pipe arranged on the vibrating table and a spiral disk coiled on the central cooling pipe, wherein the central cooling pipe is vertically arranged and closed at both ends, wherein a water cooling device is arranged in the central cooling pipe, wherein a sand dropping chassis is also arranged on the central cooling pipe, wherein the sand dropping chassis is arranged on the lower side of the spiral disk, and wherein a sand outlet is arranged on the sand dropping chassis.

[0007] Optionally, the water cooling device includes a spiral tube arranged in a central cooling tube and spiral fins coiled on the spiral tube. A central heat resistance is also provided in the central cooling tube. The spiral tube is used to circulate cooling liquid and is arranged in a cavity between the central heat resistance and the central cooling tube.

[0008] Optionally, an outer side of the spiral disk is provided with an external support frame, and the external support frame is connected to the sand falling bottom plate.

[0009] Optionally, the external support structure includes a plurality of external support tubes, the bottom end of each of the external support tubes is fixed to the sand falling bottom plate, the side walls of each of the external support tubes are fixed to the spiral disk, and the external support tubes are provided with a make-up air inlet and a plurality of make-up air nozzles, and the output end of the make-up air nozzle is inclined downward and points to the upper side of the corresponding layer of the spiral disk.

[0010] Optionally, a plurality of the vibrating sand spreading devices are arranged side by side, and a sand feeding mechanism is provided on the cooling box chamber, and the sand feeding mechanism is used to transport the fallen sand to the spiral disk on each vibrating sand spreading device.

[0011] Optionally, the sand feeding mechanism includes a vibrating sand feeding pipe, a vibration source is provided on the vibrating sand feeding pipe, the vibrating sand feeding pipe is inclined at a certain angle, a sand falling bin is provided at the inclined upper end of the vibrating sand feeding pipe, and a sand feeding port is provided on the vibrating sand feeding pipe, and the sand feeding port is arranged in a one-to-one correspondence with the inlet end of the spiral disk.

[0012] Optionally, a U-shaped groove plate is provided at the sand outlet of each sand falling chassis, and the end of the U-shaped groove plate away from the sand outlet is inclined downward, and screening holes are provided on the U-shaped groove plate. A waste sand bin is provided on the lower side of the U-shaped groove plate, and the screening holes are connected to the waste sand bin.

[0013] Optionally, the air supply port is arranged on one side of the cooling box chamber close to the inclined upper end of the vibrating sand feeding pipe, and the exhaust port is arranged on one side of the cooling box chamber close to the inclined lower end of the vibrating sand feeding pipe. The heights of all the sand dropping chassis are gradually lowered from the air supply port toward the exhaust port. In two adjacent vibrating sand spreading devices, the inclined lower end of the previous U-shaped groove plate extends to the top of the latter sand dropping chassis.

[0014] Optionally, it also includes a recovery conveying device, the inlet end of the recovery conveying device is located below the last U-shaped groove plate, the outlet end of the recovery conveying device passes through the cooling box chamber, and the recovery conveying device is provided with a scattering roller.

[0015] Optionally, it also includes a shaped like a Sun cooling pipe, which is spiral and fits on the lower side of the spiral disk, the upper tube cavity of the shaped like a Sun cooling pipe is used to circulate coolant, and the lower tube cavity of the shaped like a Sun cooling pipe is used to circulate compressed gas, and a blowing hole is provided on the lower side of the shaped like a Sun cooling pipe, and the blowing hole is connected to the lower tube cavity of the shaped like a Sun cooling pipe.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. The present application uses a vibrating sand spreading device to vibrate and spread the fallen sand on a spiral disk, and slowly drops the fallen sand along the spiral disk to a falling sand chassis. In this process, on the one hand, the water cooling device can continuously transfer cold to the spiral disk through the central cold pipe, thereby maintaining a relatively low temperature of the spiral disk, which is beneficial to rapid heat exchange between the fallen sand and the spiral disk, and improves the cooling efficiency of the fallen sand; on the other hand, the vibrating sand spreading device is disposed in the cooling box room, and cold air can be delivered to the cooling box room through the air supply port, and hot air in the cooling box room can be discharged through the exhaust port, thereby ensuring a stable cooling effect. The present application uses a vibrating sand spreading device to spread the fallen sand on a spiral disk, and promotes rapid cooling of the fallen sand through a combination of water cooling and air cooling, thereby improving the cooling efficiency of the foundry sand.

[0018] 2. By setting up the external support pipe, the spiral disk can be fixed and supported to ensure the load-bearing capacity and structural strength of the spiral disk; in addition, the external support pipe in the present application also serves as an input pipe for supplementing the input of cold air to the falling sand, further accelerating the cooling of the falling sand; one pipe has multiple uses and simplifies the overall structure.

[0019] 3. Through the inclined vibrating sand feeding pipe, fallen sand can be delivered to multiple vibrating sand spreading devices at the same time. However, the sand feeding speed of the sand feeding port at the highest point of this sand feeding method is the fastest. As the vibrating sand feeding pipe gradually tilts downward, the sand feeding speed of each sand feeding port gradually slows down. Therefore, the amount of fallen sand processed by each vibrating sand spreading device in the same period is different. The vibrating sand spreading device corresponding to the sand feeding port with the fastest sand feeding speed needs to cool a larger amount of fallen sand, and the cooling treatment pressure is greater. The present application ensures that the vibrating sand spreading device with the largest cooling treatment pressure has the best air cooling treatment effect by arranging the air supply port on the side of the cooling box chamber close to the inclined upper end of the vibrating sand feeding pipe, so that the fallen sand finally output from the sand outlet of each vibrating sand spreading device maintains a relatively uniform cooling effect.

[0020] 4. Through the setting of the U-shaped trough plate, the vibration table drives the sand falling chassis to vibrate, and synchronously drives the U-shaped trough plate to vibrate, so that the sand falling from the sand outlet can be transported to the sand falling chassis of the adjacent vibrating sand spreading device in turn, and finally the cooled casting sand is taken away from the cooling box chamber through the recovery and conveying device. There is no need to set up recovery and conveying devices at multiple sand outlets, which is convenient for reducing the cost. At the same time, when the U-shaped trough plate vibrates and transports the sand falling, the U-shaped trough plate forms a simple vibrating screen through the setting of the screening holes. By setting the mesh number of the screening holes, the casting sand with too small particle size can be screened out to ensure the recovery quality of the casting sand.

[0021] 5. Through the setting of the shaped-sun cooling pipe, when in use, the upper tube cavity of the shaped-sun cooling pipe is passed through the coolant, and the lower tube cavity is passed through the compressed gas. The coolant in the upper tube cavity can simultaneously exchange heat with the spiral disk and the compressed gas in the lower tube cavity, and the coldness of the coolant in the upper tube cavity is transferred to the spiral disk and the compressed gas in the lower tube cavity. In this way, the falling sand spread on the spiral disk can be simultaneously subjected to the coldness transfer from the blowing holes on the upper shaped-sun cooling pipe, the lower spiral disk, the inner central cooling pipe, and the outer air supply nozzle, achieving the effect of cooling on all sides, further improving the cooling efficiency of the falling sand cooling equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall internal structure of a cooling box chamber in a casting sand cooling device according to an embodiment of the present application.

[0023] Figure 2 It is a schematic diagram of the overall structure of the vibrating sand paving device in the embodiment of the present application.

[0024] Figure 3 It is a schematic diagram of the specific structure of the water cooling device in the embodiment of the present application, in which the central cooling pipe has been made transparent.

[0025] Figure 4 It is a schematic diagram of the structure of the inner and outer support tubes and the U-shaped groove plate in the embodiment of the present application.

[0026] Figure 5 It is a schematic diagram of the structure of the Japanese-shaped cooling tube in the embodiment of the present application.

[0027] Figure 6 It is a structural schematic diagram of the sand feeding mechanism in the embodiment of the present application.

[0028] Figure 7 It is a schematic diagram of the structure of the recovery and conveying device in the embodiment of the present application.

[0029] Explanation of the reference numerals: 1. Cooling chamber; 11. Air supply port; 12. Exhaust port; 2. Vibrating sand spreading device; 21. Vibrating table; 22. Central cooling pipe; 23. Spiral disk; 24. Sand falling chassis; 241. Sand outlet; 3. Water cooling device; 31. Spiral tube; 32. Spiral fin; 33. Central heat resistance; 4. External support frame; 41. External support tube; 42. Air supply inlet; 43. Air supply nozzle; 5. Sun-shaped cooling pipe; 51. Blowing hole; 6. Sand feeding mechanism; 61. Vibrating sand feeding pipe; 62. Vibration source; 63. Sand falling bin; 64. Sand feeding port; 7. U-shaped groove plate; 71. Screening hole; 72. Waste sand bin; 8. Recovery and conveying device; 81. Breaking roller; 82. Breaking sheet. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-7, further details of this application are given.

[0031] The present application embodiment discloses a casting sand cooling device. Figure 1-3 A sand dropping cooling device for casting includes a cooling box 1, one side of the cooling box 1 is provided with an air supply port 11, and the other side is provided with an air exhaust port 12. A sand vibrating paving device 2 is provided in the cooling box 1, and the sand vibrating paving device 2 includes a vibrating table 21, a central cooling pipe 22 fixedly arranged on the vibrating table 21, and a spiral disk 23 wound and fixed on the central cooling pipe 22. The central cooling pipe 22 is vertically arranged and closed at both ends, and a water cooling device 3 is provided in the central cooling pipe 22. A sand dropping bottom plate 24 is also fixed to the outside of the central cooling pipe 22, and the sand dropping bottom plate 24 is arranged on the lower side of the spiral disk 23, and a sand outlet 241 is provided on the side wall of the sand dropping bottom plate 24.

[0032] When in use, the vibrating sand spreading device 2 is used to vibrate and spread the fallen sand on the spiral disk 23, and slowly falls along the spiral disk 23 to the fallen sand bottom plate 24. In this process, on the one hand, the water cooling device 3 can continuously transfer cold to the spiral disk 23 through the central cold pipe 22, so that the spiral disk 23 maintains a relatively low temperature, which is conducive to rapid heat exchange between the fallen sand and the spiral disk 23, and improves the cooling efficiency of the fallen sand; on the other hand, the vibrating sand spreading device 2 is arranged in the cooling chamber 1, and the cold air can be delivered to the cooling chamber 1 through the air supply port 11, and the hot air in the cooling chamber 1 can be discharged through the exhaust port 12, so as to ensure a stable cooling effect. The present application spreads the fallen sand on the spiral disk 23 through the vibrating sand spreading device 2, and promotes the rapid cooling of the fallen sand by combining water cooling and air cooling, thereby improving the cooling efficiency of the casting sand.

[0033] Reference Figure 3 The water cooling device 3 includes a spiral tube 31 fixedly installed in the central cooling tube 22 and a spiral fin 32 wound on the spiral tube 31. A central heat-resisting member 33 is also fixed in the central cooling tube 22. The spiral tube 31 is used to circulate the cooling liquid and is arranged in a cavity between the central heat-resisting member 33 and the central cooling tube 22. In this embodiment, the central heat-resisting member 33 is an insulating tube. In this way, when the cooling liquid circulates in the spiral tube 31, the cooling energy can be transferred to the central cooling tube 22. By setting the central heat-resisting member 33, the cooling energy output by the spiral tube 31 can be transferred to the outside as much as possible, thereby realizing rapid cooling of the outer surface of the central cooling tube 22.

[0034] Reference Figure 2 and Figure 4, an outer support framework 4 is provided on the outer side of the spiral disk 23, and the outer support framework 4 is connected to the sand-falling chassis 24. The outer support framework 4 includes a plurality of vertically arranged outer support pipes 41. The bottom ends of the outer support pipes 41 are fixed to the sand-falling chassis 24, and the side walls of the outer support pipes 41 are fixed to the spiral disk 23. A make-up air inlet 42 and a plurality of make-up air nozzles 43 are formed in the outer support pipes 41. The output ends of the make-up air nozzles 43 are inclined downward and are arranged to point to the upper side of the corresponding layer of the spiral disk 23. In this embodiment, three outer support pipes 41 are provided. In this way, the outer support pipes 41 serve multiple purposes: they can not only fix and support the spiral disk 23 to ensure the load-bearing capacity and structural strength of the spiral disk 23, but also serve as an input pipeline for supplementing and inputting cold air into the sand-falling, further accelerating the cooling of the sand-falling.

[0035] Referring to Figure 2 and Figure 5 , a Japanese character cooling pipe 5 is fixed on the spiral disk 23. The cross-section of the Japanese character cooling pipe 5 is in the shape of a Japanese character, and it is spiral and is arranged in a fitting manner on the lower side of the spiral disk 23. The upper side pipe cavity of the Japanese character cooling pipe 5 is used for circulating coolant, and the lower side pipe cavity is used for circulating compressed gas. A plurality of air blowing holes 51 are formed in the lower side of the Japanese character cooling pipe 5, and the air blowing holes 51 are communicated with the lower side pipe cavity of the Japanese character cooling pipe 5. When in use, coolant is introduced into the upper side pipe cavity of the Japanese character cooling pipe 5, and compressed gas is introduced into the lower side pipe cavity. The coolant in the upper side pipe cavity can exchange heat with the spiral disk 23 and the compressed gas in the lower side pipe cavity at the same time, and the cold quantity of the coolant in the upper side pipe cavity is transferred to the spiral disk 23 and the compressed gas in the lower side pipe cavity. In this way, the sand-falling spread on the spiral disk 23 can be simultaneously subjected to the cold quantity transfer from the air blowing holes 51 on the upper side of the upper side Japanese character cooling pipe 5, the lower side spiral disk 23, the inner side central cooling pipe 22, and the outer side make-up air nozzles 43, achieving the effect of being cooled from four sides, and further improving the cooling efficiency of the sand-falling cooling device.

[0036] Referring to Figure 6-7 , a plurality of sand vibrating and spreading devices 2 are arranged side by side. A sand feeding mechanism 6 is provided on the cooling box chamber 1. The sand feeding mechanism 6 includes a vibrating sand feeding pipe 61. A vibration source 62 is fixed on the outer wall of the vibrating sand feeding pipe 61. Both ends of the vibrating sand feeding pipe 61 are closed and are arranged at a certain angle. The inclined upper end of the vibrating sand feeding pipe 61 is communicated with a sand-falling bin 63. The sand-falling bin 63 is fixed outside the cooling box chamber 1. A sand feeding port 64 is formed in the lower side of the vibrating sand feeding pipe 61, and the sand feeding ports 64 are arranged in one-to-one correspondence with the inlet ends of the spiral disks 23. In this embodiment. The vibration source 62 is a vibration motor. When in use, through the inclined vibrating sand feeding pipe 61, sand-falling can be simultaneously conveyed to a plurality of sand vibrating and spreading devices 2, which is beneficial to simplifying the pipeline layout of sand feeding.

[0037] Referring to Figure 2 , Figure 4 and Figure 6A U-shaped groove plate 7 is fixed at the sand outlet 241 of each sand falling bottom plate 24, and one end of the U-shaped groove plate 7 away from the sand outlet 241 is arranged to be inclined downward. A screening hole 71 is opened in the middle area of ​​the U-shaped groove plate 7, and a waste sand bin 72 is fixed at the lower side of the U-shaped groove plate 7, and the screening hole 71 is connected to the waste sand bin 72.

[0038] Reference Figure 1 and Figure 6 The air supply port 11 is arranged on one side of the cooling chamber 1 close to the inclined upper end of the vibrating sand feeding pipe 61, and the air exhaust port 12 is arranged on one side of the cooling chamber 1 close to the inclined lower end of the vibrating sand feeding pipe 61. The height of all the sand falling chassis 24 is gradually lowered from the air supply port 11 to the air exhaust port 12. In two adjacent vibrating sand spreading devices 2, the inclined lower end of the first U-shaped groove plate 7 extends to the top of the next sand falling chassis 24.

[0039] Reference Figure 1 and Figure 7 The falling sand cooling device also includes a recovery conveyor 8, the inlet end of the recovery conveyor 8 is located below the last U-shaped groove plate 7, and the outlet end of the recovery conveyor 8 passes through the cooling box chamber 1. In order to avoid the phenomenon of casting sand particles being squeezed against each other and agglomerating when transporting casting sand outward for recycling, a scattering roller 81 is rotatably installed on the recovery conveyor 8, and the scattering roller 81 is located above the conveying surface of the recovery conveyor 8. A scattering sheet 82 is fixed on the outer peripheral surface of the scattering roller 81. In this embodiment, the recovery conveyor 8 is a slope conveyor belt.

[0040] In the present application, although the vibrating sand feeding pipe 61 can simultaneously deliver fallen sand to multiple vibrating sand spreading devices 2, the sand feeding port 64 at the highest point of this sand feeding method has the fastest sand feeding speed. As the vibrating sand feeding pipe 61 gradually tilts downward, the sand feeding speed of each sand feeding port 64 gradually slows down. Therefore, the amount of fallen sand processed by each vibrating sand spreading device 2 in the same period is different. The vibrating sand spreading device 2 corresponding to the sand feeding port 64 with the fastest sand feeding speed needs to cool a larger amount of fallen sand, and the cooling treatment pressure is greater. The present application arranges the air supply port 11 on the side of the cooling box chamber 1 close to the inclined upper end of the vibrating sand feeding pipe 61, so as to ensure that the vibrating sand spreading device 2 with the largest cooling treatment pressure has the best air cooling treatment effect, so that the fallen sand finally output from the sand outlet 241 of each vibrating sand spreading device 2 maintains a relatively uniform cooling effect.

[0041] When the vibrating sand spreading device 2 is used, the vibrating table 21 drives the falling sand chassis 24 to vibrate, and simultaneously drives the U-shaped trough plate 7 to vibrate, so that the falling sand output from the sand outlet 241 can be vibrated and transported to the falling sand chassis 24 of the adjacent vibrating sand spreading device 2 in sequence, and finally the cooled casting sand is taken away from the cooling box chamber 1 through the recovery and conveying device 8, and there is no need to set up the recovery and conveying devices 8 at multiple sand outlets 241, which is convenient for reducing the cost. At the same time, when the U-shaped trough plate 7 vibrates and transports the falling sand, the U-shaped trough plate 7 forms a simple vibrating screen through the setting of the screening holes 71. By setting the mesh number of the screening holes 71, the casting sand with too small particle size can be screened out to ensure the recovery quality of the casting sand.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A casting sand cooling device, characterized in that: The invention comprises a cooling box (1), wherein the cooling box (1) is provided with an air supply port (11) and an air exhaust port (12), wherein a vibrating sand spreading device (2) is provided in the cooling box (1), wherein the vibrating sand spreading device (2) comprises a vibrating table (21), a central cooling pipe (22) arranged on the vibrating table (21), and a spiral disk (23) wound on the central cooling pipe (22), wherein the central cooling pipe (22) is arranged vertically and closed at both ends, wherein a water cooling device (3) is provided in the central cooling pipe (22), wherein a sand dropping bottom plate (24) is further provided on the central cooling pipe (22), wherein the sand dropping bottom plate (24) is arranged on the lower side of the spiral disk (23), and wherein a sand outlet (241) is provided on the sand dropping bottom plate (24); An external support frame (4) is provided on the outer side of the spiral disk (23), and the external support frame (4) is connected to the sand falling bottom plate (24); The outer support frame (4) comprises a plurality of outer support tubes (41), the bottom end of each outer support tube (41) is fixed to the sand falling bottom plate (24), the side wall of each outer support tube (41) is fixed to the spiral disk (23), and the outer support tube (41) is provided with an air supply inlet (42) and a plurality of air supply nozzles (43), and the output end of the air supply nozzle (43) is inclined downward and points to the upper side of the corresponding layer of the spiral disk (23); It also includes a Chinese-shaped cooling pipe (5), which is spiral and is arranged in a close fit on the lower side of the spiral disk (23), the upper tube cavity of the Chinese-shaped cooling pipe (5) is used to circulate cooling liquid, and the lower tube cavity of the Chinese-shaped cooling pipe (5) is used to circulate compressed gas, and the lower side of the Chinese-shaped cooling pipe (5) is provided with a blowing hole (51), and the blowing hole (51) is connected to the lower tube cavity of the Chinese-shaped cooling pipe (5).

2. A casting sand cooling device according to claim 1, characterized in that: The water cooling device (3) comprises a spiral tube (31) arranged in a central cooling tube (22) and spiral fins (32) coiled on the spiral tube (31); a central heat-resisting member (33) is also arranged in the central cooling tube (22); the spiral tube (31) is used for circulating cooling liquid and is arranged in a cavity between the central heat-resisting member (33) and the central cooling tube (22).

3. The falling sand cooling device for casting according to claim 1, characterized in that: A plurality of the vibrating sand spreading devices (2) are arranged side by side, and a sand feeding mechanism (6) is provided on the cooling box chamber (1). The sand feeding mechanism (6) is used to transport the fallen sand to the spiral disk (23) on each vibrating sand spreading device (2).

4. A casting sand cooling device according to claim 3, characterized in that: The sand feeding mechanism (6) comprises a vibrating sand feeding pipe (61), a vibration source (62) is provided on the vibrating sand feeding pipe (61), the vibrating sand feeding pipe (61) is inclined at a certain angle, a sand falling bin (63) is provided at the inclined upper end of the vibrating sand feeding pipe (61), and a sand feeding port (64) is provided on the vibrating sand feeding pipe (61), and the sand feeding port (64) is arranged in one-to-one correspondence with the inlet end of the spiral disk (23).

5. The falling sand cooling device for casting according to claim 4, characterized in that: A U-shaped groove plate (7) is provided at the sand outlet (241) of each of the sand falling bottom plates (24), one end of the U-shaped groove plate (7) away from the sand outlet (241) is arranged to be inclined downward, a screening hole (71) is provided on the U-shaped groove plate (7), a waste sand bin (72) is provided at the lower side of the U-shaped groove plate (7), and the screening hole (71) is communicated with the waste sand bin (72).

6. A casting sand cooling device according to claim 5, characterized in that: The air supply port (11) is arranged on one side of the cooling chamber (1) close to the inclined upper end of the vibrating sand feeding pipe (61), and the air exhaust port (12) is arranged on one side of the cooling chamber (1) close to the inclined lower end of the vibrating sand feeding pipe (61). The heights of all the sand dropping chassis (24) are arranged to gradually decrease from the air supply port (11) toward the air exhaust port (12). In two adjacent vibrating sand spreading devices (2), the inclined lower end of the preceding U-shaped groove plate (7) extends to the top of the succeeding sand dropping chassis (24).

7. A casting sand cooling device according to claim 6, characterized in that: It also includes a recovery conveying device (8), the inlet end of the recovery conveying device (8) is located below the last U-shaped groove plate (7), the outlet end of the recovery conveying device (8) passes through the cooling box chamber (1), and the recovery conveying device (8) is provided with a scattering roller (81).

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