A casting sand treatment cycle cooling device

Abstract

The application belongs to the technical field of casting, and is especially a casting sand treatment circulating cooling device, which comprises a rack, a cooling kettle fixedly installed on the rack, a kettle cover installed on the top of the cooling kettle, a cooling mechanism arranged in the cooling kettle, the cooling mechanism comprising a plurality of annular boxes linearly distributed along the axis of the cooling kettle, a stirring air inlet mechanism installed between the cooling kettle and the kettle cover, a screw conveyor one and a screw conveyor two arranged on the outer side of the cooling kettle, a feeding hopper installed on the screw conveyor two, and a heat exchange mechanism installed between the cooling kettle and the screw conveyor two, wherein the cooling mechanism and the stirring air inlet mechanism are used in cooperation to perform layered and step-by-step cooling on the casting sand. The cold casting sand after cooling and the hot casting sand to be cooled are uniformly mixed, and the cooling of the hot casting sand can be quickly completed.

Description

Technical Field

[0001] This invention relates to the field of casting technology, and more particularly to a circulating cooling device for casting sand treatment. Background Technology

[0002] The "Intelligent Foundry Island" draws inspiration from the concept of a "manufacturing island," deeply integrating and collaboratively managing related equipment (such as melting furnaces, casting machines, molding machines, cleaning equipment, etc.), industrial robots, logistics systems, testing instruments, and personnel in the foundry production process. This integration utilizes information technologies such as the Industrial Internet of Things (IIoT), Supervisory Control and Data Acquisition (SCADA), and Manufacturing Execution System (MES) to form a relatively independent and highly efficient, flexible "island" unit. Foundry sand is a molding material used to prepare molding sand and core sand in foundry production. During the foundry process, to achieve the recycling of foundry sand, it needs to be processed. Sand processing and cooling are crucial components of the "Intelligent Foundry Island," making the foundry sand cooling device an indispensable piece of equipment.

[0003] However, in existing technologies that use air cooling to cool foundry sand, the cooling air cannot fully contact the high-temperature foundry sand, resulting in a slow cooling rate. Therefore, a circulating cooling device for foundry sand processing is proposed. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention proposes a circulating cooling device for casting sand treatment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a casting sand treatment circulating cooling device, comprising a frame, a cooling tank fixedly mounted on the frame, a tank cover mounted on the top of the cooling tank, a cooling mechanism provided inside the cooling tank, the cooling mechanism comprising multiple annular boxes linearly distributed along the axis of the cooling tank, a stirring and air-inlet mechanism installed between the cooling tank and the tank cover, and an auger elevator I and an auger elevator II provided outside the cooling tank, the auger elevator II being equipped with a feeding hopper, and the cooling tank and the auger elevator II... A heat exchange mechanism is installed between them. The cooling mechanism and the stirring and air intake mechanism work together to cool the casting sand in layers step by step. The auger elevator is used to transport part of the cooled casting sand after it has been cooled by the cooling mechanism and the stirring and air intake mechanism back into the cooling tank to mix with the newly entered hot casting sand to complete the cooling of the hot casting sand. The heat exchange mechanism uses cooling gas discharged from the cooling tank at different temperatures to cool the hot casting sand that enters the cooling tank through the auger elevator from bottom to top in a step-by-step manner, with the temperature decreasing sequentially.

[0006] Preferably, the annular box is fixedly connected to the inner wall of the cooling vessel, and two discharge pipes are provided through the annular box. A discharge pipe and a feed pipe are fixedly installed through the cooling vessel. The feed pipe is located above the discharge pipe. Multiple annular boxes are located between the discharge pipe and the feed pipe. The discharge pipe is fixedly connected to and communicates with one of the discharge pipes in the lowest annular box. The auger elevator is provided with a feed inlet and a discharge outlet. The feed inlet and the discharge pipe are fixedly connected and communicate with each other. The discharge outlet and the feed pipe are fixedly connected and communicate with each other.

[0007] Preferably, a second feed pipe is fixedly installed through the cooling vessel, the second feed pipe is located above multiple annular boxes, the second screw conveyor is provided with a second feed inlet and a second discharge outlet, the second feed inlet is fixedly connected and communicates with the feeding hopper, and the second feed inlet is fixedly connected and communicates with the second feed pipe.

[0008] Preferably, the bottom of the annular box is evenly provided with multiple exhaust holes, the stirring and air intake mechanism includes a transmission pipe that passes through multiple annular boxes and is rotatably connected to the annular boxes, the top end of the transmission pipe is sealed, a motor is fixedly installed on the top of the kettle cover, the output shaft of the motor extends into the cooling kettle and is connected to the top end of the transmission pipe through a coupling, a sealing element is rotatably installed at the bottom end of the transmission pipe, a rigid pipe is fixedly installed through the sealing element, the rigid pipe passes through the cooling kettle and is fixedly connected to the cooling kettle, multiple through holes I distributed in a circumferential array are provided on the inner side of the annular box, and multiple through holes II adapted to the multiple through holes I are provided on the transmission pipe.

[0009] Preferably, a stirring component is rotatably mounted on the top of the annular box. The stirring component includes an annular cylinder fixedly sleeved on the transmission tube. Multiple arc-shaped stirring blades distributed in a circumferential array are fixedly mounted on the side of the annular cylinder. The bottom of the arc-shaped stirring blades is slidably connected to the top of the annular box.

[0010] Preferably, the heat exchange mechanism includes multiple heat exchange cylinders fixedly sleeved on the screw conveyor and evenly distributed. Each heat exchange cylinder has an air inlet and an air outlet. The heat exchange mechanism also includes multiple connecting pipes that penetrate the cooling vessel and are fixedly connected to the cooling vessel. Each connecting pipe has an air inlet end and an air outlet end. The multiple air inlets are located below the corresponding annular boxes, and the multiple air outlets are fixedly connected to and communicate with the corresponding air inlets.

[0011] Preferably, the air inlets on the multiple connecting pipes are distributed at equal intervals from top to bottom, and the air outlets connected to each air inlet are distributed at equal intervals from bottom to top.

[0012] Preferably, a screw conveyor is fixedly installed at the bottom of the cooling vessel. The screw conveyor is provided with a third inlet and a third outlet. The third inlet is fixed to the bottom of the cooling vessel and is connected to the cooling vessel.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The present invention uses cooled cold casting sand and hot casting sand to be cooled to mix evenly, which can quickly cool the hot casting sand.

[0015] 2. After the cooling gas cools the hot casting sand in multiple stages, the cooling gas discharged from the cooling kettle is recycled and reused. The recycled cooling gas is used to cool the hot casting sand that enters the cooling kettle through the auger elevator in stages from high temperature to low temperature, so that the recycled cooling gas can be fully utilized. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a circulating cooling device for casting sand processing proposed in this invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the overall structure of a circulating cooling device for casting sand processing proposed in this invention. Figure 2 ;

[0018] Figure 3 This is a side sectional view of a circulating cooling device for casting sand processing proposed in this invention;

[0019] Figure 4 This is a schematic diagram of the auger elevator, feeding hopper, and heat exchange mechanism in a circulating cooling device for casting sand processing proposed in this invention.

[0020] Figure 5 This is a partial side sectional view of the cooling mechanism and the stirring and air intake mechanism in a circulating cooling device for casting sand processing proposed in this invention.

[0021] Figure 6 for Figure 5 A magnified structural diagram of part A in the middle;

[0022] Figure 7 This is a front sectional view of a circulating cooling device for casting sand processing proposed in this invention.

[0023] In the diagram: 1. Cooling vessel; 11. Discharge pipe; 12. Feed pipe one; 13. Feed pipe two; 2. Vessel lid; 3. Screw conveyor one; 31. Feed inlet one; 32. Discharge outlet one; 4. Screw conveyor two; 41. Feed inlet two; 42. Discharge outlet two; 5. Feed hopper; 6. Screw discharge machine; 61. Feed inlet three; 62. Discharge outlet three; 7. Cooling mechanism; 71. Annular box; 711. Exhaust port; 712 72. Guide hole 1; 73. Feed pipe; 74. Stirring component; 75. Annular cylinder; 76. Arc-shaped stirring blade; 87. Stirring and air intake mechanism; 88. Transmission pipe; 89. Guide hole 2; 80. Motor; 81. Rigid pipe; 82. Sealing component; 91. Heat exchange mechanism; 92. Heat exchange cylinder; 93. Air inlet; 94. Air outlet; 95. Connecting pipe; 96. Air inlet end; 97. Air outlet end; 98. Frame. Detailed Implementation

[0024] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please refer to Figures 1-7 This invention provides a technical solution: a circulating cooling device for casting sand treatment, comprising a frame 10, a cooling vessel 1 fixedly mounted on the frame 10, a vessel cover 2 mounted on the top of the cooling vessel 1, a cooling mechanism 7 inside the cooling vessel 1, the cooling mechanism 7 comprising a plurality of annular boxes 71 linearly distributed along the axis of the cooling vessel 1, a stirring and air-inlet mechanism 8 installed between the cooling vessel 1 and the vessel cover 2, and an auger elevator 3 and an auger elevator 4 located outside the cooling vessel 1, with a feeding hopper 5 mounted on the auger elevator 4, and a feeding hopper 5 installed between the cooling vessel 1 and the auger elevator 4. The heat exchange mechanism 9, cooling mechanism 7, and stirring and air intake mechanism 8 work together to cool the casting sand in layers. The screw conveyor 3 is used to transport part of the cooled casting sand after it has been cooled by the cooling mechanism 7 and the stirring and air intake mechanism 8 back into the cooling tank 1 to mix with the newly entered hot casting sand to complete the cooling of the hot casting sand. The heat exchange mechanism 9 uses cooling gas discharged from the cooling tank 1 at different temperatures to cool the hot casting sand that enters the cooling tank 1 through the screw conveyor 4 from bottom to top in a step-by-step manner.

[0026] The annular box 71 is fixedly connected to the inner wall of the cooling vessel 1. Two feed pipes 72 are provided through the annular box 71. A discharge pipe 11 and a feed pipe 12 are fixedly installed through the cooling vessel 1. The feed pipe 12 is located above the discharge pipe 11. Multiple annular boxes 71 are located between the discharge pipe 11 and the feed pipe 12. The discharge pipe 11 is fixedly connected to and communicates with one of the feed pipes 72 in the lowest annular box 71. The auger elevator 3 is provided with a feed inlet 31 and a discharge outlet 32. The feed inlet 31 is fixedly connected to and communicates with the discharge pipe 11. The discharge outlet 32 ​​is fixedly connected to and communicates with the feed pipe 12.

[0027] A feed pipe 2 13 is fixedly installed through the cooling vessel 1. The feed pipe 2 13 is located above multiple annular boxes 71. The screw conveyor 2 4 is provided with a feed inlet 2 41 and a discharge outlet 2 42. The feed inlet 2 41 is fixedly connected to and communicates with the feeding hopper 5. The feed inlet 2 41 is fixedly connected to and communicates with the feed pipe 2 13.

[0028] The bottom of the annular box 71 is evenly provided with multiple exhaust holes 711. The stirring and air intake mechanism 8 includes a transmission pipe 81 that passes through multiple annular boxes 71 and is rotatably connected to the annular boxes 71. The top end of the transmission pipe 81 is sealed. The top of the lid 2 is fixedly installed with a motor 82. The output shaft of the motor 82 extends into the cooling vessel 1 and is connected to the top end of the transmission pipe 81 through a coupling. The bottom end of the transmission pipe 81 is rotatably installed with a sealing element 831. A rigid pipe 83 is fixedly installed through the sealing element 831. The rigid pipe 83 passes through the cooling vessel 1 and is fixedly connected to the cooling vessel 1. The inner side of the annular box 71 is provided with multiple through holes 712 arranged in a circumferential array. The transmission pipe 81 is provided with multiple through holes 811 that are adapted to the multiple through holes 712.

[0029] A stirring element 73 is rotatably mounted on the top of the annular box 71. The stirring element 73 includes an annular cylinder 731 fixedly sleeved on the transmission tube 81. Multiple arc-shaped stirring blades 732 arranged in a circumferential array are fixedly mounted on the side of the annular cylinder 731. The bottom of the arc-shaped stirring blades 732 is slidably connected to the top of the annular box 71.

[0030] Furthermore, such as Figure 5 As shown, when the agitator 73 rotates clockwise, it can gather the casting sand at the top of the annular box 71 toward the center. When the agitator 73 rotates counterclockwise, it will push the casting sand at the top of the annular box 71 away from the center.

[0031] The heat exchange mechanism 9 includes multiple heat exchange cylinders 91 that are fixedly sleeved on the screw conveyor 4 and distributed at equal intervals. Each heat exchange cylinder 91 has an air inlet 911 and an air outlet 912. The heat exchange mechanism 9 also includes multiple connecting pipes 92 that penetrate the cooling vessel 1 and are fixedly connected to the cooling vessel 1. Each connecting pipe 92 has an air inlet end 921 and an air outlet end 922. The multiple air inlets 921 are located below the corresponding annular box 71, and the multiple air outlets 922 are fixedly connected to and communicate with the corresponding air inlets 911.

[0032] The air inlet ends 921 on the multiple connecting pipes 92 are distributed at equal intervals from top to bottom, and the air outlet ends 922 connected to each air inlet end 921 are distributed at equal intervals from bottom to top.

[0033] Furthermore, the vent end 922 is designed with a downward-facing bevel to prevent falling casting sand from entering the vent end 922.

[0034] Furthermore, the air inlet 911 in the heat exchange cylinder 91 is located below the air outlet 912. The heat exchange cylinder 91 is provided with threaded blades. When the cooling gas enters the heat exchange cylinder 91 from the air inlet 911 and is discharged from the air outlet 912, the cooling gas flows spirally upward in the air inlet 911, thereby achieving full contact between the cooling gas and the auger elevator 4.

[0035] like Figure 4 As shown, the temperature of the cooling gas flowing through multiple heat exchange cylinders 91 decreases sequentially from bottom to top, thereby achieving a step-by-step cooling of the spirally rising casting sand inside the auger elevator 4.

[0036] A screw conveyor 6 is fixedly installed at the bottom of the cooling vessel 1. The screw conveyor 6 is provided with a feed inlet 3 61 and a discharge outlet 3 62. The feed inlet 3 61 is fixed to the bottom of the cooling vessel 1 and is connected to the cooling vessel 1.

[0037] Furthermore, due to the sealing of the bottom of the cooling vessel 1 by the screw conveyor 6, the cooling gas discharged downward from the multiple annular boxes 71 will enter the multiple connecting pipes 92 after cooling the casting sand below.

[0038] In this embodiment: When in use, hot casting sand is fed into the feeding hopper 5, and a gas supply pipe for supplying low-temperature drying and cooling gas is connected to the rigid pipe 83. The casting sand in the feeding hopper 5 enters the screw conveyor 4 through the feed inlet 2 41. The screw conveyor 4 lifts the hot casting sand by a screw, and then the hot casting sand is discharged through the discharge outlet 2 42 and enters the uppermost annular box 71 through the feed pipe 2 13.

[0039] Cooling gas enters the transmission pipe 81 through the rigid pipe 83, and then enters the annular boxes 71 through the connected through holes 811 and 712. The cooling gas is then discharged downward through the exhaust holes 711, keeping the top of the annular box 71 at a low temperature. The hot casting sand falling on the top of the annular box 71 comes into contact with the low temperature of the annular box 71, thereby cooling the hot casting sand.

[0040] When the hot casting sand falls onto the top of the annular box 71, the motor 82 is simultaneously started, driving the transmission pipe 81 to rotate. The transmission pipe 81 then drives multiple stirring components 73 to rotate. Figure 5 As shown, when the transmission pipe 81 drives the stirring component 73 to rotate clockwise, it can stir the hot casting sand at the top of the annular box 71, so that the cooled cold casting sand and the uncooled hot casting sand are mixed, thereby completing the cooling of all the casting sand. In addition, when the stirring component 73 rotates clockwise, it can gather the casting sand at the top of the annular box 71 towards the transmission pipe 81, thereby preventing the casting sand from leaking out from the feed pipe 72.

[0041] After the casting sand has cooled down at the top of the annular box 71 for a period of time, the control motor 82 reverses, causing the transmission pipe 81 to drive multiple stirring components 73 to rotate counterclockwise, thereby spreading and pushing the casting sand at the top of the annular box 71 outward, so that the casting sand can be discharged from the discharge pipe 72, and the casting sand can pass through the annular box 71 and be discharged downward.

[0042] Except for the casting sand at the top of the uppermost annular box 71, the casting sand at the top of the remaining annular boxes 71 and the casting sand accumulated on the inner wall of the bottom of the cooling vessel 1 will be cooled by the cooling gas discharged from the multiple exhaust holes 711 in the upper annular box 71.

[0043] In summary, after the hot casting sand passes through multiple annular boxes 71, it will be thoroughly cooled. After the completely cooled cold casting sand is discharged from the two discharge pipes 72 on the bottom annular box 71, part of the cold casting sand will fall to the bottom of the cooling kettle 1 and be discharged by the auger discharge machine 6. The other part of the cold casting sand will enter the auger elevator 3 through the discharge pipe 11 and the feed port 11. By the spiral lifting of the auger elevator 3, the cold casting sand will be transported from the discharge port 12 and the feed pipe 12 to the top of the top annular box 71. The cold casting sand discharged from the feed pipe 12 and accumulated on the top layer will mix with the hot casting sand that is subsequently transported to the top of the top annular box 71 from the feed pipe 2 13. The mixing of hot and cold casting sand, combined with the low temperature of the annular box 71, can accelerate the cooling of the hot casting sand.

[0044] The cooling gas discharged downward from multiple annular boxes 71 cools the casting sand below, and then enters the connecting pipe 92 through multiple air outlets 922 and is discharged. As the casting sand is cooled step by step, the temperature of the cooling gas entering the multiple connecting pipes 92 from top to bottom decreases sequentially.

[0045] The cooling gas that enters each heat exchange cylinder 91 from multiple connecting pipes 92 can cool down the hot casting sand spirally lifted in the screw conveyor 4. The temperature of the cooling gas in the multiple heat exchange cylinders 91 decreases from bottom to top, thereby achieving step-by-step cooling of the casting sand in the screw conveyor 4.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A circulating cooling device for casting sand treatment, comprising a frame (10), characterized in that: A cooling vessel (1) is fixedly installed on the frame (10). A vessel cover (2) is installed on the top of the cooling vessel (1). A cooling mechanism (7) is provided inside the cooling vessel (1). The cooling mechanism (7) includes multiple annular boxes (71) linearly distributed along the axis of the cooling vessel (1). A stirring and air-inlet mechanism (8) is installed between the cooling vessel (1) and the vessel cover (2). A auger elevator I (3) and a auger elevator II (4) are provided on the outside of the cooling vessel (1). A feeding hopper (5) is installed on the auger elevator II (4). A heat exchange mechanism is installed between the cooling vessel (1) and the auger elevator II (4). (9) The cooling mechanism (7) and the stirring and air intake mechanism (8) work together to cool the casting sand in layers step by step. The auger elevator (3) is used to transport part of the cooled casting sand after being cooled by the cooling mechanism (7) and the stirring and air intake mechanism (8) back into the cooling tank (1) to mix with the hot casting sand newly entering the cooling tank (1) to complete the cooling of the hot casting sand. The heat exchange mechanism (9) uses cooling gas discharged from the cooling tank (1) at different temperatures to cool the hot casting sand that enters the cooling tank (1) through the auger elevator (4) step by step from bottom to top. The bottom of the annular box (71) is evenly provided with multiple exhaust holes (711). The stirring and air intake mechanism (8) includes a transmission pipe (81) that passes through multiple annular boxes (71) and is rotatably connected to the annular boxes (71). The top end of the transmission pipe (81) is sealed. The top of the lid (2) is fixedly installed with a motor (82). The output shaft of the motor (82) extends into the cooling kettle (1) and is connected to the top end of the transmission pipe (81) through a coupling. The bottom end of the transmission pipe (81) is rotatably installed with a sealing element (831). A rigid pipe (83) is fixedly installed through the sealing element (831). The rigid pipe (83) passes through the cooling kettle (1) and is fixedly connected to the cooling kettle (1). The inner side of the annular box (71) is provided with multiple through holes (712) arranged in a circular array. The transmission pipe (81) is provided with multiple through holes (811) that are adapted to the multiple through holes (712). A stirring component (73) is rotatably mounted on the top of the annular box (71). The stirring component (73) includes an annular cylinder (731) fixedly sleeved on the transmission pipe (81). Multiple arc-shaped stirring blades (732) arranged in a circular array are fixedly mounted on the side of the annular cylinder (731). The bottom of the arc-shaped stirring blades (732) is slidably connected to the top of the annular box (71).

2. The foundry sand treatment circulating cooling device according to claim 1, characterized in that: The annular box (71) is fixedly connected to the inner wall of the cooling vessel (1). Two feed pipes (72) are provided through the annular box (71). A discharge pipe (11) and a feed pipe (12) are fixedly installed through the cooling vessel (1). The feed pipe (12) is located above the discharge pipe (11). Multiple annular boxes (71) are located between the discharge pipe (11) and the feed pipe (12). The discharge pipe (11) is fixedly connected to and communicates with one of the feed pipes (72) in the lowest annular box (71). The auger elevator (3) is provided with a feed inlet (31) and a discharge outlet (32). The feed inlet (31) and the discharge pipe (11) are fixedly connected and communicate with each other. The discharge outlet (32) and the feed pipe (12) are fixedly connected and communicate with each other.

3. The foundry sand treatment circulating cooling device according to claim 1, characterized in that: The cooling vessel (1) is fixedly installed with a feed pipe (13) through it. The feed pipe (13) is located above multiple annular boxes (71). The screw conveyor (4) is provided with a feed inlet (41) and a discharge outlet (42). The feed inlet (41) is fixedly connected to and communicates with the feeding hopper (5). The feed inlet (41) is fixedly connected to and communicates with the feed pipe (13).

4. The foundry sand treatment circulating cooling device according to claim 1, characterized in that: The heat exchange mechanism (9) includes multiple heat exchange cylinders (91) fixedly mounted on the screw conveyor (4) and distributed at equal intervals. The heat exchange cylinders (91) are provided with an air inlet (911) and an air outlet (912). The heat exchange mechanism (9) also includes multiple connecting pipes (92) that penetrate the cooling vessel (1) and are fixedly connected to the cooling vessel (1). The connecting pipes (92) are provided with an air inlet (921) and an air outlet (922). The multiple air inlets (921) are located below the corresponding annular box (71), and the multiple air outlets (922) are fixedly connected to and communicate with the corresponding air inlets (911).

5. A circulating cooling device for casting sand treatment according to claim 4, characterized in that: The air inlets (921) on the multiple connecting pipes (92) are distributed at equal intervals from top to bottom, and the air outlets (922) connected to each air inlet (921) are distributed at equal intervals from bottom to top.

6. The foundry sand treatment circulating cooling device according to claim 1, characterized in that: The bottom of the cooling vessel (1) is fixedly installed with a screw conveyor (6). The screw conveyor (6) is provided with a feed inlet (61) and a discharge outlet (62). The feed inlet (61) is fixed to the bottom of the cooling vessel (1) and connected to the cooling vessel (1).

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