Die casting protection casting device

Abstract

The utility model discloses a protective casting device for die casting, and relates to the technical field of die casting. A die casting protection casting device comprises a molten steel pool and a fixed bottom plate, the molten steel pool is located above the fixed bottom plate, a die casting cooling structure is located on the fixed bottom plate, and the die casting cooling structure comprises a lower-layer protective cover, an upper-layer protective cover, two cooling pipes, two water inlet pipes, two water outlet pipes and two arc-shaped fixed plates. Through cooperation of cooling pipes, a water inlet pipe, a water drainage pipe, an arc-shaped fixing plate, a mounting plate and bolts, the two cooling pipes can be conveniently mounted through the bolts, the two cooling pipes can be wound and attached to the outer portion of the protection cover, cooling liquid flows in the cooling pipes, the protection cover body can be conveniently, evenly and rapidly cooled, and the service life of the protection cover body is prolonged. The service life of the protection device is prolonged. An argon blowing ring pipe is fixedly connected to the upper-layer protection cover in a sleeving mode, a plurality of vertically-downward gas escape holes are formed in the ring pipe, and the inside of the protection cover body can be effectively isolated from air by introducing argon.

Description

Technical Field

[0001] This utility model relates to the field of mold casting technology, and in particular to a mold casting protective casting device. Background Technology

[0002] In the steel smelting industry, ingot casting protection devices are important equipment to ensure that molten steel is protected from external contamination and maintains high quality during the casting process.

[0003] In traditional mold casting protective casting devices, during the casting process, the 200mm-250mm distance between the high-temperature molten steel exiting the ladle nozzle and the gate makes it easy for the molten steel to come into contact with air. This contact leads to nitrogen accumulation in the molten steel, ultimately affecting the mechanical properties and service life of the steel. Currently, some mold casting processes lack protective devices, while others have simple protective casting devices, but these are merely shells with poor protective casting effects. Furthermore, due to the large amount of heat released during the casting process, the protective devices suffer from insufficient cooling speed and uneven cooling, making them prone to deformation and resulting in a short lifespan. Therefore, we propose a new mold casting protective casting device. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a mold casting protective casting device that can effectively reduce contact with air, reduce nitrogen accumulation in molten steel, and thus improve the mechanical properties and service life of the steel. It can also solve problems such as insufficient cooling rate and uneven cooling in mold casting protective devices, thereby improving the service life of the protective casting device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mold casting protective casting device, comprising:

[0006] A molten steel tank and a fixed base plate, with the molten steel tank located above the fixed base plate;

[0007] The die-casting cooling structure is located on a fixed base plate.

[0008] The in-mold cooling structure includes a lower protective cover, an upper protective cover, two cooling pipes, two water inlet pipes, two drain pipes, and two arc-shaped fixing plates. The lower protective cover is installed on top of the fixed base plate, and the upper protective cover is installed inside the lower protective cover. Both arc-shaped fixing plates are fixedly connected to the top of the fixed base plate. Both cooling pipes are fixedly connected to their corresponding arc-shaped fixing plates. Both water inlet pipes and two drain pipes are fixedly connected to their corresponding cooling pipes.

[0009] Preferably, each of the two arc-shaped fixing plates has two mounting plates fixedly connected to its top, and two bolts are threaded onto the four mounting plates. The two arc-shaped fixing plates are installed using the two bolts.

[0010] Preferably, the inner bottom wall of the steel pool is provided with a water outlet, which is connected to the interior of the lower protective cover.

[0011] Preferably, an argon blowing ring tube is fixedly sleeved on the upper protective cover, and the ring tube has several vertically downward gas escaping holes. A connecting pipe is fixedly connected to the outer surface of the argon blowing ring tube.

[0012] Preferably, a connector, a pressure gauge, and a pressure regulating valve are fixedly installed on the connecting pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This molded protective casting device, through the cooperation of cooling pipes, water inlet pipes, drain pipes, arc-shaped fixing plates, mounting plates and bolts, facilitates the installation of two cooling pipes using bolts. This allows the two cooling pipes to be wrapped and fitted to the outside of the protective cover. With the coolant flowing inside the cooling pipes, the protective device is cooled evenly and quickly, thereby improving its service life.

[0015] 2. The mold casting protective casting device has an argon blowing ring pipe fixedly sleeved on the upper protective cover. The ring pipe has several vertically downward gas escaping holes. The introduction of argon gas can effectively isolate the inside of the protective cover from the air and reduce nitrogen accumulation in the molten steel. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the lower protective cover of this utility model;

[0019] Figure 3 This is a schematic diagram of the fixed base plate structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the cooling pipe structure of this utility model.

[0021] Reference numerals in the attached drawings: 1. Steel pool; 2. Fixed base plate; 3. Lower protective cover; 4. Cooling pipe; 5. Mounting plate; 6. Drain pipe; 7. Water inlet pipe; 8. Water outlet; 9. Upper protective cover; 10. Argon blowing ring pipe; 11. Connecting parts; 12. Pressure gauge; 13. Pressure regulating valve; 14. Arc-shaped fixing plate; 15. Bolt. Detailed Implementation

[0022] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] Please see Figure 1-4 This utility model provides a technical solution: a mold casting protective casting device, comprising:

[0027] A steel pool 1 and a fixed base plate 2, with the steel pool 1 located above the fixed base plate 2;

[0028] The die-casting cooling structure is located on the fixed base plate 2;

[0029] The in-mold cooling structure includes a lower protective cover 3, an upper protective cover 9, two cooling pipes 4, two water inlet pipes 7, two drain pipes 6, and two arc-shaped fixing plates 14. The lower protective cover 3 is installed on the top of the fixed base plate 2, the upper protective cover 9 is installed inside the lower protective cover 3, the two arc-shaped fixing plates 14 are fixedly connected to the top of the fixed base plate 2, the two cooling pipes 4 are fixedly connected to the corresponding arc-shaped fixing plates 14, and the two water inlet pipes 7 and the two drain pipes 6 are fixedly connected to the corresponding cooling pipes 4.

[0030] Two mounting plates 5 are fixedly connected to the top of each of the two arc-shaped fixing plates 14. Two bolts 15 are threaded onto the four mounting plates 5. The two arc-shaped fixing plates 14 are installed by the two bolts 15. A water inlet 8 is opened on the inner bottom wall of the steel pool 1. The water inlet 8 is connected to the interior of the lower protective cover 3. An argon blowing ring pipe 10 is fixedly sleeved on the upper protective cover 9. A connecting pipe is fixedly connected to the outer surface of the argon blowing ring pipe 10. A connector 11, a pressure gauge 12 and a pressure regulating valve 13 are fixedly installed on the connecting pipe.

[0031] The upper protective cover 9 is a cylindrical steel cover with a taper of 18-22°, a height of 145-155 mm, and a top diameter of 195-205 mm. An argon gas distribution channel is provided inside the cover, with an inlet pipe installed within the channel. Several vertically downward gas vents are opened on the channel. The lower inner and outer layers of the cover are wrapped with refractory material. The lower protective cover 3 consists of two semi-cylindrical covers with the same taper as the upper protective cover 9, a height of 145-155 mm, and a bottom diameter of 395-405 mm. Both the inner and outer layers of the cover are wrapped with refractory material. The argon gas distribution channel is an annular channel located at the top of the cover, and the refractory material is asbestos felt.

[0032] Furthermore, when using the device, two arc-shaped fixing plates 14 are installed by personnel using two bolts 15, so that two cooling pipes 4 can be wrapped and attached to the outside of the lower protective cover 3. By connecting the external pipes to the water inlet pipe 7 and the drain pipe 6, the coolant can flow in the cooling pipes 4, thereby facilitating the cooling of the molded parts inside the lower protective cover 3. With the cooling pipes 4 wrapped and attached, the cooling pipes 4 can uniformly and quickly cool the molded parts inside the lower protective cover 3.

[0033] Hoist the ladle to the casting car platform and adjust it until the center of the ladle nozzle 8 is aligned with the center of the inlet pipe; 1. Place a layer of high-temperature refractory asbestos felt along the upper edge of the inlet pipe; 2. After the argon gas test is normal, place a bowl-shaped zirconium fiber sealing ring above the tapered cylindrical protective steel cover, then place the protective steel cover below the ladle nozzle 8, close to the bottom of the ladle, start the casting car to the pouring position and start pouring. After the guide sand has flowed out completely and the casting is round, close the slide plate and start the casting car until the center of the ladle nozzle 8 is aligned with the center of the inlet pipe; 3. Open the argon gas valve and adjust the argon gas pressure to 0.1~0. 3MPa; 4. Casting: After adjusting the steel flow to a suitable level, place two tapered semi-cylindrical lower protective covers from both sides of the casting car onto the refractory asbestos felt of the extended section of the middle injection pipe. The upper edge of the lower protective cover should be close to the lower edge of the upper protective cover. Ensure that one end of the two semi-cylindrical protective steel covers is tightly attached. If there is a gap at the other end, high-temperature resistant asbestos felt can be inserted to maintain the argon pressure inside the protective cover greater than the external gas pressure, thus achieving full protection of the steel flow during casting. This invention isolates air by implementing full argon protection for the cast flow exposed to air, reducing the contact between molten steel and air. Nitrogen addition during the casting process is ≤8ppm.

[0034] The protective casting device consists of two layers of protective steel covers. The upper protective cover is a cylindrical steel cover with a 20° taper, 151 mm high and 200 mm in diameter at the top. An argon gas distribution channel with an inlet pipe is located within the cover. Several vertically downward gas vents are located along the channel. The lower part of the cover is lined with refractory material on both the inner and outer layers. The lower protective cover consists of two semi-cylindrical covers with the same taper as the upper cover, 150 mm high and 403 mm in diameter at the bottom. Both the inner and outer layers of these covers are lined with refractory material. The bottom of the sprue is 232 mm from the platform of the extended section of the injection pipe. The argon gas distribution channel is an annular channel located at the top of the cover. The refractory material is high-temperature refractory asbestos felt. The casting steel grade is 12Cr2Mo1VR. Samples were taken from the beginning and end of the rolled steel for comparison with ladle samples, with nitrogen additions of 6 ppm and 5 ppm respectively during the process.

[0035] The protective casting device consists of two layers of protective steel covers. The upper protective cover is a cylindrical steel cover with a 20° taper, 150mm high and 201mm in diameter at the top. An argon gas distribution channel with an inlet pipe is located within the cover; several vertically downward gas vents are located along the channel. The lower inner and outer layers of the cover are lined with refractory material. The lower protective cover consists of two semi-cylindrical covers with the same taper as the upper cover, 148mm high and 404mm in diameter at the bottom. Both the inner and outer layers of these covers are lined with refractory material. The bottom of the sprue is 220mm from the extension platform of the central injection pipe. The argon gas distribution channel is an annular channel located at the top of the cover. The refractory material is high-temperature refractory asbestos felt. The casting steel grade is 12Cr2Mo1VR. Samples were taken from the beginning and end of the rolled steel for comparison with ladle samples, with nitrogen additions of 4ppm and 3ppm respectively during the process.

[0036] With the cooperation of cooling pipe 4, water inlet pipe 7, drain pipe 6, arc-shaped fixing plate 14, mounting plate 5 and bolts 15, it is easy to install the two cooling pipes 4 using bolts 15, so that the two cooling pipes 4 can be wrapped and attached to the outside of the protective cover. With the coolant flowing in the cooling pipes 4, it is easy to cool the molded parts inside the protective cover. With the cooling pipes 4 wrapped and attached, the cooling pipes 4 can uniformly and quickly cool the molded parts inside the protective cover, thereby improving the mechanical properties and service life of the steel.

[0037] Working principle: By using two bolts 15 to install two arc-shaped fixing plates 14, two cooling pipes 4 can be wrapped and attached to the outside of the lower protective cover 3. By connecting the external pipes to the water inlet pipe 7 and the drain pipe 6, the coolant can flow in the cooling pipes 4, thereby facilitating the cooling of the molded parts inside the lower protective cover 3. With the cooling pipes 4 wrapped and attached, the cooling pipes 4 can uniformly and quickly cool the molded parts inside the lower protective cover 3.

[0038] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A die-cast protective casting device, characterized by, Include: molten steel pool (1) and fixed bottom plate (2), molten steel pool (1) is located above the fixed bottom plate (2); Mold cooling structure, mold cooling structure is located on the fixed bottom plate (2); Mold cooling structure includes lower protective cover (3), upper protective cover (9), two cooling pipes (4), two water inlet pipes (7), two drain pipes (6) and two arc-shaped fixed plates (14), the lower protective cover (3) is installed on the top of the fixed bottom plate (2), the upper protective cover (9) is installed inside the lower protective cover (3); Wherein, two arc-shaped fixed plates (14) are fixedly connected on the top of the fixed bottom plate (2), two cooling pipes (4) are fixedly connected with corresponding arc-shaped fixed plates (14), two water inlet pipes (7) and two drain pipes (6) are fixedly connected with corresponding cooling pipes (4).

2. A moulding protection pouring device according to claim 1, characterised in that: The top of the two arc-shaped fixed plates (14) is fixedly connected with two mounting plates (5), four mounting plates (5) are threadedly connected with two bolts (15), and the two arc-shaped fixed plates (14) are installed through the two bolts (15).

3. A moulding protection pouring device according to claim 1, characterised in that: The inner bottom wall of the molten steel pool (1) is provided with a water gap (8), and the water gap (8) is communicated with the inside of the lower protective cover (3).

4. A moulding protection pouring device according to claim 1, characterised in that: The upper protective cover (9) is fixedly sleeved with an argon blowing ring pipe (10), the argon blowing ring pipe (10) is provided with a plurality of vertically downward gas escape holes, and the outer surface of the argon blowing ring pipe (10) is fixedly connected with a connecting pipe.

5. A moulding protection pouring apparatus as claimed in claim 4, wherein: The connecting pipe is fixedly installed with a connecting piece (11), a pressure gauge (12) and a pressure regulating valve (13) respectively.

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