Cooling device for large-section nodular iron casting production

Abstract

The utility model relates to a cooling device for large-section nodular iron casting production, which comprises a cooling box and a cooling assembly, and the cooling assembly comprises an air inlet part, an air outlet part and a placing part positioned in the cooling box, the placing part comprises an upper semi-annular cooling sleeve and a lower annular cooling sleeve which are oppositely arranged, a plurality of arc-shaped top frames are axially arranged on the lower annular cooling sleeve, the upper semi-annular cooling sleeve can be close to or far away from the lower annular cooling sleeve, and when the upper semi-annular cooling sleeve is close to and gathered to the lower annular cooling sleeve, the arc-shaped top frames are arranged on the arc-shaped top frames. A tubular ventilation channel is formed between the inner side of the upper semi-annular cooling sleeve and the inner side of the lower semi-annular cooling sleeve, and the air inlet part is used for enabling air outside the cooling box to flow into the containing part and then flow out of the cooling box from the air outlet part. The cooling area is obviously increased, and the cooling efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of ductile iron casting production technology, and in particular to a cooling device for the production of large-section ductile iron castings. Background Technology

[0002] In the production process of large-section ductile iron castings, the cooling process is one of the key factors that determines the quality of the castings.

[0003] Currently, traditional cooling devices and methods have many shortcomings. Traditional cooling devices cannot fully cover all parts of large-section ductile iron castings, resulting in insufficient cooling in some areas and affecting the overall performance of the casting. For example, for some complex-shaped large-section ductile iron castings, existing cooling devices cannot effectively cool local areas such as the edges, making the cooling rate of these areas significantly slower than other parts, thus affecting the quality of cooling processing. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a cooling device for the production of large-section ductile iron castings. The specific technical solution is as follows:

[0005] A cooling device for the production of large-section ductile iron castings includes a cooling box and a cooling assembly. The cooling assembly includes an air inlet, an air outlet, and a placement section located inside the cooling box. The placement section includes an upper semi-annular cooling sleeve and a lower annular cooling sleeve arranged opposite each other. The lower annular cooling sleeve has multiple arc-shaped top frames arranged axially. The upper semi-annular cooling sleeve can move closer to or further away from the lower annular cooling sleeve. When the upper semi-annular cooling sleeve moves closer to the lower annular cooling sleeve, a tubular ventilation channel is formed between the inner sides of the upper and lower annular cooling sleeves. The air inlet is used to draw air from outside the cooling box into the placement section and then out through the air outlet to the outside of the cooling box.

[0006] As an improvement to the above technical solution: the lower annular cooling sleeve is located below the upper semi-annular cooling sleeve, the end of the lower annular cooling sleeve is connected to the cooling box through a connecting rod, and a top hydraulic cylinder is installed on the top side of the inner wall of the cooling box through a top mounting plate, and the output rod of the top hydraulic cylinder is fixedly connected to the top end of the upper semi-annular cooling sleeve.

[0007] As an improvement to the above technical solution: the air inlet includes a cooler and a second air inlet pipe. The cooler is mounted on the cooling box. One end of the second air inlet pipe is close to the air inlet end of the lower annular cooling sleeve. The air outlet end of the cooler is connected to the other end of the second air inlet pipe through the first air inlet pipe. The air outlet includes an air outlet pipe. One end of the air outlet pipe is close to the air outlet end of the lower annular cooling sleeve. The other end of the air outlet pipe extends to the outside of the cooling box.

[0008] As an improvement to the above technical solution, it also includes a first and a second fluid-passing hose for circulating coolant, as well as a third and a fourth fluid-passing hose for circulating coolant. One end of the first fluid-passing hose penetrates into the interior of the cooling tank and is connected to the internal cavity of the upper annular cooling sleeve. One end of the second fluid-passing hose is connected to the internal cavity of the upper annular cooling sleeve, and the other end of the second fluid-passing hose penetrates into the exterior of the cooling tank. One end of the third fluid-passing hose penetrates into the interior of the cooling tank and is connected to the internal cavity of the lower annular cooling sleeve. One end of the fourth fluid-passing hose is connected to the internal cavity of the lower annular cooling sleeve, and the other end of the fourth fluid-passing hose penetrates into the exterior of the cooling tank.

[0009] As an improvement to the above technical solution: an exhaust fan is installed on the cooling box, the exhaust end of the exhaust fan is connected to the interior of the cooling box through an exhaust pipe, a third air inlet pipe is connected to the side of the cooling box away from the exhaust fan, a first valve is installed on the third air inlet pipe, and a second valve is installed on the air outlet pipe.

[0010] As an improvement to the above technical solution: the lower annular cooling sleeve is provided with several ventilation sleeves, and the arc-shaped top frame is evenly distributed with several openings.

[0011] As an improvement to the above technical solution: a bottom hydraulic cylinder is installed on the bottom side of the cooling box via a bottom mounting plate, and the output rod of the bottom hydraulic cylinder is connected to a semi-annular shielding sleeve that is compatible with the lower annular cooling sleeve.

[0012] As an improvement to the above technical solution, it also includes a controller, and the exhaust fan, air cooler, bottom hydraulic cylinder, top hydraulic cylinder, first valve and second valve are all connected.

[0013] As an improvement to the above technical solution, a door is provided on the side of the cooling box.

[0014] The beneficial effects of this utility model are:

[0015] 1. By setting up an openable upper semi-circular cooling jacket and a lower semi-circular cooling jacket, a tubular ventilation channel is formed when the two are brought together. The cold air can fully contact all parts of the large-section ductile iron casting, which significantly increases the cooling area and improves the cooling efficiency.

[0016] 2. By introducing coolant through a flexible cooling hose, the upper and lower semi-circular cooling jackets can be cooled, further improving the cooling effect, making the workpiece cool more evenly, reducing internal stress, and improving the quality of the casting. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a partial structural diagram of the cooling component in this utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure between the upper semi-annular cooling jacket and the lower annular cooling jacket in this utility model.

[0020] Reference numerals: 1. Cooling box; 2. Exhaust fan; 21. Exhaust pipe; 3. Air cooler; 31. First air inlet pipe; 4. Upper semi-annular cooling jacket; 41. First fluid-passing hose; 42. Second fluid-passing hose; 5. Lower annular cooling jacket; 50. Connecting rod; 51. Third fluid-passing hose; 52. Fourth fluid-passing hose; 53. Ventilation sleeve; 54. Arc-shaped top frame; 540. Opening; 6. Bottom mounting plate; 61. Bottom hydraulic cylinder; 7. Semi-annular shielding sleeve; 8. Second air inlet pipe; 9. Top mounting plate; 91. Top hydraulic cylinder; 10. Third air inlet pipe; 11. Air outlet pipe. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] Example

[0023] Please refer to Figures 1-3 This utility model provides a cooling device for the production of large-section ductile iron castings, mainly including a cooling box 1 and a cooling assembly disposed within the cooling box 1. The cooling assembly further includes an air inlet, an air outlet, and a placement section located inside the cooling box 1. The placement section consists of an upper semi-annular cooling sleeve 4 and a lower semi-annular cooling sleeve arranged facing each other. The lower semi-annular cooling sleeve has multiple arc-shaped top brackets 54 arranged axially. The upper semi-annular cooling sleeve 4 can move closer to or further away from the lower semi-annular cooling sleeve. When the two approach and converge, a tubular ventilation channel is formed between the inner sides of the upper semi-annular cooling sleeve 4 and the lower semi-annular cooling sleeve. The air inlet is used to draw air from outside the cooling box 1 into the placement section and then out through the air outlet to the outside of the cooling box 1.

[0024] Specifically, the upper semi-annular cooling jacket 4 is located inside the upper part of the cooling box 1, and its top end is fixedly connected to the output rod of the top hydraulic cylinder 91. The top hydraulic cylinder 91 is mounted on the top side of the inner wall of the cooling box 1 via a top mounting plate 9. The top mounting plate 9 is a rectangular metal plate, which is tightly connected to the top side of the inner wall of the cooling box 1 by bolts to ensure that the top hydraulic cylinder 91 is firmly installed. The output rod of the top hydraulic cylinder 91 can move up and down linearly under the control of the controller, thereby driving the upper semi-annular cooling jacket 4 to rise and fall. The interior of the upper semi-annular cooling jacket 4 can be a hollow structure to contain coolant, and its outer surface is made of smooth metal material to reduce airflow resistance.

[0025] The lower semi-annular cooling jacket is located below the upper semi-annular cooling jacket 4, and its end is connected to the cooling box 1 via a connecting rod 50. The connecting rod 50 is a cylindrical metal rod, with one end welded to the end of the lower semi-annular cooling jacket and the other end fixedly connected to the inner wall of the cooling box 1 by bolts. The lower semi-annular cooling jacket can also be a hollow structure, capable of holding coolant. Several ventilation sleeves 53 are provided on the lower semi-annular cooling jacket. The ventilation sleeves 53 are circular and evenly distributed on the circumferential surface of the lower semi-annular cooling jacket to facilitate air circulation. Several arc-shaped top frames 54 are arranged along the axial direction of the lower semi-annular cooling jacket. The arc-shaped top frames 54 are semi-circular metal frames with several rectangular openings 540 evenly distributed on their surfaces to further enhance air circulation. The bottom of the arc-shaped top frames 54 is welded to the inner wall of the lower semi-annular cooling jacket to provide support for the large section of ductile iron casting.

[0026] The air cooler 3 is installed on the outer wall of the cooling box 1 and is fixedly connected to the cooling box 1 by bolts. The function of the air cooler 3 is to generate cold air and provide a cold source for the cooling process.

[0027] The air intake section includes a first air intake pipe 31 and a second air intake pipe 8. One end of the first air intake pipe 31 is sealed to the air outlet of the air cooler 3, which can be achieved using a rubber gasket and clamps to ensure a tight connection and prevent air leakage. The other end of the first air intake pipe 31 is connected to the second air intake pipe 8. One end of the second air intake pipe 8 is close to the air intake end of the lower semi-annular cooling jacket. Cold air enters the tubular ventilation channel formed by the lower semi-annular cooling jacket and the upper semi-annular cooling jacket 4 through the first air intake pipe 31 and the second air intake pipe 8.

[0028] One end of the vent pipe is close to the vent of the lower semi-annular cooling jacket, and the other end extends to the outside of the cooling box 1. The connection between the vent pipe and the cooling box 1 is sealed to prevent air leakage. A second valve is installed on the vent pipe; this second valve is an electric ball valve, and its opening can be controlled by a controller to regulate the airflow.

[0029] In some optional embodiments, this application further includes a coolant circulation system, mainly comprising a first coolant hose 41 and a second coolant hose 42. One end of the first coolant hose 41 extends into the interior of the cooling tank 1 and connects to the internal cavity of the upper annular cooling jacket 4, using a sealed connector to ensure no coolant leakage. One end of the second coolant hose 42 connects to the internal cavity of the upper annular cooling jacket 4, and the other end extends to the outside of the cooling tank 1 for coolant outflow and circulation.

[0030] The lower semi-annular cooling jacket coolant piping includes a third fluid inlet hose 51 and a fourth fluid inlet hose 52. One end of the third fluid inlet hose 51 extends into the interior of the cooling tank 1 and connects to the internal cavity of the lower semi-annular cooling jacket using a sealed connector. One end of the fourth fluid inlet hose 52 connects to the internal cavity of the lower semi-annular cooling jacket, while the other end extends to the outside of the cooling tank 1 for coolant outflow and circulation. The coolant circulates through these pipes within the upper and lower semi-annular cooling jackets, carrying away heat and further cooling the workpiece.

[0031] In some optional embodiments, this application also includes an auxiliary ventilation system, mainly comprising an exhaust fan 2, which is installed on the outer wall of the cooling box 1 and fixedly connected to the cooling box 1 by bolts. The exhaust end of the exhaust fan 2 is connected to the interior of the cooling box 1 through an exhaust pipe 21, and the connection between the exhaust pipe 21 and the cooling box 1 is sealed to prevent air leakage.

[0032] The cooling box 1 is connected to a third air inlet pipe 10 on the side away from the exhaust fan 2. A first valve is installed on the third air inlet pipe 10. The first valve is an electric butterfly valve, and its opening degree can be controlled by a controller to regulate the amount of air flowing in.

[0033] In some optional embodiments, a bottom hydraulic cylinder 61 is mounted on the inner bottom side of the cooling box 1 via a bottom mounting plate 6. The bottom mounting plate 6 is a rectangular metal plate, which is fixedly connected to the inner bottom side of the cooling box 1 by bolts. The output rod of the bottom hydraulic cylinder 61 is connected to a semi-annular shielding sleeve 7 that is adapted to the lower semi-annular cooling sleeve. The semi-annular shielding sleeve 7 is a semi-circular metal cover whose inner diameter matches the outer diameter of the lower semi-annular cooling sleeve. It can move up and down under the drive of the bottom hydraulic cylinder 61 to block the ventilation sleeve 53 on the lower semi-annular cooling sleeve.

[0034] In some optional embodiments, this application also includes a controller, wherein the exhaust fan 2, the air cooler 3, the bottom hydraulic cylinder 61, the top hydraulic cylinder 91, the first valve, and the second valve are all electrically or wirelessly connected to the controller. The controller may be a programmable logic controller (PLC) that controls the operation of each component through a preset program to achieve automated operation.

[0035] Specifically, in the first cooling stage of the workflow of this application, the top hydraulic cylinder 91 is controlled by the controller to move the upper semi-annular cooling sleeve 4 away from the lower semi-annular cooling sleeve, thereby opening the door of the cooling box 1. The door can be connected to the cooling box 1 by a hinge.

[0036] Then, the controller controls the bottom hydraulic cylinder 61 to raise the semi-annular shielding sleeve 7, blocking the ventilation sleeve 53 on the lower semi-annular cooling sleeve. The piston rod of the bottom hydraulic cylinder 61 extends, pushing the semi-annular shielding sleeve 7 upward until it completely covers the ventilation sleeve 53.

[0037] The large section of ductile iron casting is then placed on the arc-shaped top bracket 54 of the lower semi-annular cooling jacket. The arc-shaped top bracket 54 provides stable support for the workpiece, ensuring that the workpiece does not wobble during the cooling process.

[0038] Next, the door of the cooling box 1 is closed, and the top hydraulic cylinder 91 is controlled again by the controller to bring the upper semi-annular cooling jacket 4 closer to the lower semi-annular cooling jacket, forming a tubular ventilation channel. The piston rod of the top hydraulic cylinder 91 retracts, causing the upper semi-annular cooling jacket 4 to move downward and fit tightly against the lower semi-annular cooling jacket.

[0039] Turn on the air cooler 3 again. Cool air enters the tubular ventilation duct through the first air inlet pipe 31 and the second air inlet pipe 8 to cool the workpiece. At the same time, coolant can be injected into the upper and lower semi-annular cooling jackets through the first liquid flow hose 41 and the third liquid flow hose 51. The coolant circulates inside the upper and lower semi-annular cooling jackets, carrying away heat and further cooling the workpiece.

[0040] The controller can adjust parameters such as the air speed, coolant flow rate, and temperature of the air cooler 3 according to the size, material, and cooling requirements of the workpiece to ensure optimal cooling effect.

[0041] In the second stage of cooling, after the first stage of cooling is completed, the first valve on the third air inlet pipe 10 is opened, and the top hydraulic cylinder 91 is controlled by the controller to drive the upper semi-annular cooling sleeve 4 away from the lower semi-annular cooling sleeve. Then, the bottom hydraulic cylinder 61 is controlled by the controller to lower the semi-annular shielding sleeve 7 away from the lower semi-annular cooling sleeve, so that the workpiece placed on the lower semi-annular cooling sleeve is in an open state.

[0042] Then, start the exhaust fan 2. The exhaust fan 2 removes the hot air from inside the cooling box 1 through the exhaust pipe 21, further reducing the workpiece temperature. The airflow speed and flow rate are controlled by adjusting the fan speed 2 and the opening of the first valve through the controller.

[0043] Once the workpiece temperature drops to the set value, turn off the exhaust fan 2, the air cooler 3, and the coolant circulation system. Open the door of the cooling box 1 and remove the cooled workpiece.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cooling device for the production of large-section ductile iron castings, characterized in that, The cooling system includes a cooling box (1) and a cooling assembly. The cooling assembly includes an air inlet, an air outlet, and a placement section located inside the cooling box (1). The placement section includes an upper semi-annular cooling sleeve (4) and a lower annular cooling sleeve (5) arranged opposite to each other. The lower annular cooling sleeve (5) has multiple arc-shaped top brackets (54) arranged axially. The upper semi-annular cooling sleeve (4) can move closer to or away from the lower annular cooling sleeve (5). When the upper semi-annular cooling sleeve (4) moves closer to the lower annular cooling sleeve (5), a tubular ventilation channel is formed between the inner sides of the upper semi-annular cooling sleeve (4) and the lower annular cooling sleeve (5). The air inlet is used to draw air from outside the cooling box (1) into the placement section and then out through the air outlet to the outside of the cooling box (1).

2. A cooling device for the production of large-section ductile iron castings according to claim 1, characterized in that: The lower annular cooling sleeve (5) is located below the upper semi-annular cooling sleeve (4). The end of the lower annular cooling sleeve (5) is connected to the cooling box (1) via a connecting rod (50). A top hydraulic cylinder (91) is installed on the top side of the inner wall of the cooling box (1) via a top mounting plate (9). The output rod of the top hydraulic cylinder (91) is fixedly connected to the top end of the upper semi-annular cooling sleeve (4).

3. A cooling device for the production of large-section ductile iron castings according to claim 2, characterized in that: The air inlet section includes a cooler (3) and a second air inlet pipe (8). The cooler (3) is installed on the cooling box (1). One end of the second air inlet pipe (8) is close to the air inlet end of the lower annular cooling sleeve (5). The air outlet end of the cooler (3) is connected to the other end of the second air inlet pipe (8) through the first air inlet pipe (31). The air outlet section includes an air outlet pipe (11). One end of the air outlet pipe (11) is close to the air outlet end of the lower annular cooling sleeve (5). The other end of the air outlet pipe (11) extends to the outside of the cooling box (1).

4. A cooling device for the production of large-section ductile iron castings according to claim 1, characterized in that: It also includes a first fluid flow hose (41) and a second fluid flow hose (42) for circulating coolant, as well as a third fluid flow hose (51) and a fourth fluid flow hose (52) for circulating coolant; One end of the first liquid-conducting hose (41) penetrates into the interior of the cooling box (1) and is connected to the internal cavity of the upper semi-annular cooling sleeve (4). One end of the second liquid-conducting hose (42) is connected to the internal cavity of the upper semi-annular cooling sleeve (4), and the other end of the second liquid-conducting hose (42) penetrates into the exterior of the cooling box (1). One end of the third liquid-conducting hose (51) penetrates into the interior of the cooling box (1) and is connected to the internal cavity of the lower semi-annular cooling sleeve (5). One end of the fourth liquid-conducting hose (52) is connected to the internal cavity of the lower semi-annular cooling sleeve (5), and the other end of the fourth liquid-conducting hose (52) penetrates into the exterior of the cooling box (1).

5. A cooling device for the production of large-section ductile iron castings according to claim 4, characterized in that: A fan (2) is installed on the cooling box (1). The exhaust end of the fan (2) is connected to the interior of the cooling box (1) through an exhaust pipe (21). A third air inlet pipe (10) is connected to the side of the cooling box (1) away from the fan (2). A first valve is installed on the third air inlet pipe (10), and a second valve is installed on the air outlet pipe (11).

6. A cooling device for the production of large-section ductile iron castings according to claim 5, characterized in that: The lower annular cooling sleeve (5) has several ventilation sleeves (53), and the arc-shaped top frame (54) has several openings (540) evenly distributed.

7. A cooling device for the production of large-section ductile iron castings according to claim 6, characterized in that: The bottom side of the cooling box (1) is equipped with a bottom hydraulic cylinder (61) via a bottom mounting plate (6). The output rod of the bottom hydraulic cylinder (61) is connected to a semi-annular shielding sleeve (7) that is compatible with the lower annular cooling sleeve (5).

8. A cooling device for the production of large-section ductile iron castings according to claim 7, characterized in that: It also includes a controller, and the exhaust fan (2), the air cooler (3), the bottom hydraulic cylinder (61), the top hydraulic cylinder (91), the first valve and the second valve are all connected.

9. A cooling device for the production of large-section ductile iron castings according to claim 8, characterized in that: The cooling box (1) is provided with a door on its side.

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