Depressurization furnace for continuous casting of titanium alloy

Abstract

The utility model relates to the technical field of casting equipment, in particular to a titanium alloy continuous casting depressurization furnace which comprises a hollow furnace body with openings in the two ends, the opening in one end of the furnace body is a feeding opening, and the opening in the other end of the furnace body is a connecting opening used for being connected with a casting furnace. One end of the furnace body with the feed port is movably connected with a gravity cabin door, the top of the furnace body is provided with a cabin door lifting mechanism, and when the feed port of the furnace body is closed, the gravity cabin door clings to the end surface of the furnace body by self-gravity to close the feed port; the top of the furnace body is rotationally connected with a rotating shaft, the cabin door lifting mechanism comprises a winding wheel rotationally connected to the top of the furnace body, and the rotating shaft is fixedly connected with a control rod. According to the embodiment of the invention, the gravity cabin door capable of rotating relative to the furnace body is arranged, and the opening of the furnace chamber is closed by virtue of the self weight of the gravity cabin door without additionally arranging a cabin door fastening device, so that the opening and closing efficiency of the furnace body cabin door is remarkably improved, and the efficiency of the whole process of continuous casting is improved.

Description

Technical Field

[0001] The present application relates to the technical field of casting equipment, and in particular to a pressure-reducing furnace for continuous casting of titanium alloys. Background Art

[0002] During vacuum casting, the pressure in the furnace cavity needs to be gradually reduced to achieve the vacuum effect. During the pressure reduction operation, the opening of the furnace body needs to be closed. In the prior art, the furnace door is generally closed using a movable buckle or a locking mechanism. This method has a low efficiency in opening and closing the furnace door, which will reduce the overall efficiency of continuous casting during continuous casting. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the present application provides a pressure-reducing furnace for continuous casting of titanium alloys. The embodiment of the present application is to set a gravity hatch that can rotate relative to the furnace body, rely on the gravity hatch's own weight to close the opening of the furnace cavity, and do not require the installation of additional hatch fastening devices, thereby significantly improving the efficiency of opening and closing the furnace door and improving the efficiency of the overall continuous casting process.

[0004] The above-mentioned application objectives of this application are achieved through the following technical solutions:

[0005] A pressure-reducing furnace for continuous casting of titanium alloys, comprising a furnace body with openings at both ends and a hollow interior, wherein the opening at one end of the furnace body is a feed port, and the opening at the other end of the furnace body is a connection port for connecting to a casting furnace;

[0006] The furnace body has a feed port at one end which is movably connected to a gravity hatch. A hatch lifting mechanism is provided on the top of the furnace body. When the feed port of the furnace body is closed, the gravity hatch relies on its own gravity to cling to the end surface of the furnace body to close the feed port.

[0007] The top of the furnace body is rotatably connected to a rotating shaft, and the hatch lifting mechanism includes a winding wheel rotatably connected to the top of the furnace body, a control rod is fixedly connected to the rotating shaft, the connection point between the control rod and the gravity hatch is far away from the rotating shaft, and a pulling rope is entangled on the winding wheel, and the end of the pulling rope away from the winding wheel is fixedly connected to the end of the control rod away from the hatch.

[0008] Optionally, there are two hatch door lifting mechanisms, which are symmetrically distributed.

[0009] Optionally, a linkage mechanism is also provided on the top of the furnace body, which is located between the two hatch lifting mechanisms. The linkage mechanism includes a linkage shaft and a drive motor for driving the linkage shaft to rotate. The two ends of the linkage shaft are respectively fixedly connected to the two winding wheels. When the linkage shaft rotates, the winding wheels of the two hatch lifting mechanisms rotate at the same angular velocity.

[0010] Optionally, a gear disc is fixedly connected to the main shaft of the driving motor, a gear is fixedly connected to the outer side of the linkage shaft, and the gear disc is meshed with the gear.

[0011] Optionally, the control rod includes a support rod and a lever, one end of the lever is fixedly connected to the gravity hatch, the other end of the lever is fixedly connected to the pulling rope, one end of the support rod is fixed on the rotating shaft, and the other end of the support rod is fixedly connected to the middle of the lever.

[0012] Optionally, a high-temperature return gas pipe is fixedly connected to the bottom of the furnace body, and an exhaust pipe is provided on the top of the furnace body. Both the high-temperature return gas pipe and the exhaust pipe are connected to the internal space of the furnace body.

[0013] Optionally, the side of the gravity hatch away from the furnace body is arc-shaped, and the thickness of the top and bottom of the gravity hatch is less than the thickness of the middle part of the gravity hatch.

[0014] In summary, this application has the following beneficial technical effects:

[0015] The embodiment of the present application is to provide a gravity hatch that can rotate relative to the furnace body, relying on the gravity hatch's own weight to close the opening of the furnace cavity, without the need for additional hatch fastening devices, thereby significantly improving the efficiency of opening and closing the furnace body hatch and improving the efficiency of the entire continuous casting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the interior of a furnace body according to one embodiment of the present application;

[0017] Figure 2 This is a closed schematic diagram of a gravity hatch according to one embodiment of the present application;

[0018] Figure 3 It is a schematic diagram of a linkage mechanism according to an embodiment of the present application.

[0019] Reference numerals: 10, furnace body; 11, feed port; 12, connection port; 13, high-temperature gas recycling pipe; 14, exhaust pipe;

[0020] 20. Gravity hatch;

[0021] 30. Hatch door lifting mechanism; 31. Reel; 32. Lifting rope;

[0022] 40. Rotating axis;

[0023] 50. Control rod; 51. Support rod; 52. Lever;

[0024] 60. Linkage mechanism; 61. Linkage shaft; 62. Drive motor; 63. Spur gear; 64. Gear. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1 -Attached Figure 3 The application is further described in detail.

[0026] The application provides a pressure reduction furnace for continuous casting of titanium alloy, which comprises a furnace body 10 of the pressure reduction furnace, the furnace body 10 has a furnace cavity inside, and a feeding port 11 and a connecting port 12 are respectively arranged at two ends of the furnace body 10 and communicate with the furnace cavity, the feeding port 11 is used for placing a mold, and the connecting port 12 is used for connecting with an inlet of a subsequent vacuum casting furnace.

[0027] One end of the furnace body 10 with the feeding port 11 is movably connected with a gravity cabin door 20, and a cabin door lifting mechanism 30 for controlling the position of the gravity cabin door 20 is arranged on the top of the furnace body 10.

[0028] A rotating shaft 40 is rotatably connected to the top of the furnace body 10, a control rod 50 is fixedly connected to the rotating shaft 40, one end of the control rod 50 is fixedly connected to the gravity cabin door 20, the gravity cabin door 20 rotates around the central axis of the rotating shaft 40 as the rotation center line, the opening and closing of the connecting port 12 is realized by rotating the gravity cabin door 20, and the connecting point of the control rod 50 and the gravity cabin door 20 is away from the rotating shaft 40, the cabin door lifting mechanism 30 comprises a winding wheel 31 rotatably connected to the top of the furnace body 10, and a pulling rope 32 is wound on the winding wheel 31, one end of the pulling rope 32 away from the winding wheel 31 is fixedly connected to one end of the control rod 50 away from the cabin door.

[0029] The application is further described in detail.

[0030] In use, an operator rotates the winding wheel 31, the winding wheel 31 winds the pulling rope 32 to pull the bottom of the gravity cabin door 20 to rotate away from the feeding port 11 of the furnace body 10, the feeding port 11 of the furnace body 10 is opened, at this time, the operator places the mold into the furnace body 10, then the operator releases the winding wheel 31, the gravity cabin door 20 falls back to the initial position by gravity, the side of the gravity cabin door 20 close to the feeding port 11 of the furnace body 10 is tightly attached to the furnace body 10 at the end of the feeding port 11 of the furnace body 10, and the feeding port 11 of the furnace body 10 is closed.

[0031] After the feeding port 11 of the furnace body 10 is closed, the operator can extract the gas in the furnace cavity, after the pressure in the furnace cavity approaches vacuum, the gravity cabin door 20 is further tightly attached to the furnace body 10 by the atmospheric pressure.

[0032] In the process of closing the feeding port 11 of the furnace body 10, the operator does not need to manually close the cabin door, and no additional closing and fastening measures need to be applied to the gravity cabin door 20, which significantly improves the efficiency of opening and closing the cabin door of the furnace body 10, and in the process of continuous casting, the required time for opening and closing the cabin door of the furnace body 10 is reduced, and the efficiency of the whole process of continuous casting is also improved.

[0033] The rotating shaft 40 is fixedly connected to the control rod 50, and the control rod 50 is used to indirectly realize the rotating shaft 40 line with the central axis of the rotating shaft 40. The operator rotates the winding wheel 31 and pulls the gravity cabin door 20 through the pulling rope 32 to rotate the gravity cabin door 20 upward. In this process, the gravity cabin door 20 always uses the central axis of the rotating shaft 40 as the rotating shaft 40 line. The gravity cabin door 20 is not directly fixed to the rotating shaft 40, which improves the fitting rate between the end face of the gravity cabin door 20 on one side close to the furnace body 10 and the end of the furnace body 10, thereby increasing the overall sealing of the furnace cavity after the gravity cabin door 20 closes the feed port 11 of the furnace body 10.

[0034] In general, the embodiment of the present application is to set a gravity hatch 20 that can rotate relative to the furnace body 10, rely on the gravity hatch 20 to close the opening of the furnace cavity, and no additional hatch fastening device is required, thereby significantly improving the efficiency of opening and closing the hatch of the furnace body 10 and improving the efficiency of the overall continuous casting process.

[0035] In an embodiment of the present application, there are two door lifting mechanisms 30, and the two door lifting mechanisms 30 are symmetrically distributed. The two door lifting mechanisms 30 jointly drive the gravity door 20 to rotate, so that the rotation movement of the gravity door 20 is smoother. The two door lifting mechanisms 30 can be linked through a linkage mechanism 60. The linkage mechanism 60 can be set at the top of the furnace body 10. The linkage mechanism 60 is located between the two door lifting mechanisms 30. The linkage mechanism 60 includes a linkage shaft 61 and a drive motor 62 for driving the linkage shaft 61 to rotate. The two ends of the linkage shaft 61 are respectively fixedly connected to the two winding wheels 31. When the drive motor 62 drives the linkage shaft 61 to rotate, the winding wheels 31 of the two door lifting mechanisms 30 rotate at the same angular velocity, thereby realizing the opening and closing of the door.

[0036] Among them, there are many ways for the drive motor 62 to drive the linkage shaft 61. In some possible implementation methods of the embodiments of the present application, a gear plate 63 is fixedly connected to the main shaft of the drive motor 62, and a gear 64 is fixed to the outside of the linkage shaft 61. The gear plate 63 is meshed with the gear 64. When the main shaft of the drive motor 62 rotates to drive the gear plate 63 to rotate, the gear plate 63 drives the linkage shaft 61 to rotate through the meshing connection with the gear 64, thereby driving the winding wheels 31 at both ends of the linkage shaft 61 to rotate at the same angular velocity.

[0037] The cam 52 is connected to the control rod 50 so that the gravity door 20 can be lifted up and opened by the cam 52.

[0038] In an embodiment of the present application, the side of the gravity door 20 away from the furnace body 10 is arc-shaped, and the thickness of the top and bottom of the gravity door 20 is less than the thickness of the middle part of the gravity door 20, so that the center of the gravity door 20 is in the middle part of the gravity door 20, so that the gravity door 20 can achieve a good sealing effect when it falls under the action of gravity.

[0039] In the embodiment of the present application, an exhaust pipe 14 is provided on the top of the furnace body 10, and the exhaust pipe 14 is connected to the internal space of the furnace body 10. The pressure in the furnace cavity is controlled by the exhaust pipe 14. A return high-temperature gas pipe 13 is fixedly connected to the bottom of the furnace body 10, and the return high-temperature gas pipe 13 is connected to the internal space of the furnace body 10. The return high-temperature gas pipe 13 can be connected to the casting furnace or the blowing mold mechanism, so that the waste heat during the cooling of the casting furnace and the mold is recycled into the furnace body 10 to preheat the mold, effectively utilizing the preheating and improving the energy utilization efficiency.

[0040] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A pressure-reducing furnace for continuous casting of titanium alloys, characterized in that: A furnace body (10) having a hollow interior and openings at both ends, wherein the opening at one end of the furnace body (10) is a feed port (11), and the opening at the other end of the furnace body (10) is a connection port (12) for connecting to a casting furnace; The furnace body (10) has a feed port (11) at one end of which a gravity hatch (20) is movably connected. A hatch lifting mechanism (30) is provided on the top of the furnace body (10). When the feed port (11) of the furnace body (10) is closed, the gravity hatch (20) relies on its own gravity to cling to the end surface of the furnace body (10) to close the feed port (11). The top of the furnace body (10) is rotatably connected to a rotating shaft (40), and the hatch lifting mechanism (30) includes a winding wheel (31) rotatably connected to the top of the furnace body (10), a control rod (50) is fixedly connected to the rotating shaft (40), and a connection point between the control rod (50) and the gravity hatch (20) is away from the rotating shaft (40), and a pulling rope (32) is entangled on the winding wheel (31), and one end of the pulling rope (32) away from the winding wheel (31) is fixedly connected to the end of the control rod (50) away from the hatch.

2. A pressure-reducing furnace for continuous casting of titanium alloy according to claim 1, characterized in that: There are two hatch door lifting mechanisms (30), and the two hatch door lifting mechanisms (30) are symmetrically distributed.

3. A pressure-reducing furnace for continuous casting of titanium alloy according to claim 2, characterized in that: A linkage mechanism (60) is further provided on the top of the furnace body (10). The linkage mechanism (60) is located between the two hatch lifting mechanisms (30). The linkage mechanism (60) includes a linkage rotating shaft (61) and a driving motor (62) for driving the linkage rotating shaft (61) to rotate. Both ends of the linkage rotating shaft (61) are fixedly connected to the two winding wheels (31), respectively. When the linkage rotating shaft (61) rotates, the winding wheels (31) of the two hatch lifting mechanisms (30) rotate at the same angular velocity.

4. A pressure-reducing furnace for continuous casting of titanium alloy according to claim 3, characterized in that: A toothed disc (63) is fixedly connected to the main shaft of the driving motor (62), a gear (64) is fixedly connected to the outer side of the linkage rotating shaft (61), and the toothed disc (63) is meshedly connected with the gear (64).

5. The pressure-reducing furnace for continuous casting of titanium alloy according to claim 1, characterized in that: The control rod (50) includes a support rod (51) and a lever (52), one end of the lever (52) is fixedly connected to the gravity door (20), and the other end of the lever (52) is fixedly connected to the pulling rope (32), one end of the support rod (51) is fixed on the rotating shaft (40), and the other end of the support rod (51) is fixedly connected to the middle of the lever (52).

6. The pressure-reducing furnace for continuous casting of titanium alloy according to claim 1, characterized in that: A high-temperature gas return pipe (13) is fixedly connected to the bottom of the furnace body (10), and an exhaust pipe (14) is provided on the top of the furnace body (10). Both the high-temperature gas return pipe (13) and the exhaust pipe (14) are in communication with the internal space of the furnace body (10).

7. The pressure-reducing furnace for continuous casting of titanium alloy according to claim 1, characterized in that: The side of the gravity hatch (20) away from the furnace body (10) is arc-shaped, and the thickness of the top and bottom of the gravity hatch (20) is smaller than the thickness of the middle part of the gravity hatch (20).

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