Nested riser tube of smelting crucible for low-pressure casting of titanium alloy

Abstract

The utility model relates to the technical field of casting equipment, in particular to a nested riser tube of a smelting crucible for titanium alloy low-pressure casting, which comprises a graphite sleeve used for contacting with molten metal in the smelting crucible, and a fixing ring is further arranged on the outer side of the graphite sleeve; the inner side of the graphite sleeve is sleeved with a graphite riser tube, the bottom of the graphite riser tube is inserted into the top of the graphite sleeve, the outer side of the end, extending out of the graphite sleeve, of the graphite riser tube is sleeved with a control ring, the outer diameter of the control ring is larger than the inner diameter of the graphite sleeve, and a flexible control rope is arranged on the control ring. The end, away from the control ring, of the flexible control rope penetrates through the fixing ring. According to the embodiment of the invention, the flexible control rope is adopted to control the nested riser tube to perform the riser operation, so that an operator does not need to carry the whole riser tube and does not need to execute other additional operations, the flow of the riser step is simplified, and the efficiency of the riser step is remarkably improved.

Description

Technical Field

[0001] The present application relates to the technical field of casting equipment, and in particular to a nested riser tube of a melting crucible for low-pressure casting of titanium alloys. Background Art

[0002] The liquid inlet of the low-pressure casting mold for titanium alloy components is located at the bottom of the mold. In the existing technology, the operator can use a fixed rising pipe to deliver the molten metal into the mold, which is suitable for the casting of a single component. In the continuous casting process, the rising operation cycle required for casting is relatively short, which requires the operator to frequently move the rising pipe, which is cumbersome and inefficient. Utility Model Content

[0003] In response to the shortcomings of the prior art, the present application provides a nested riser tube for a melting crucible for low-pressure casting of titanium alloys. The embodiment of the present application uses a flexible control rope to control the nested riser tube to perform liquid lifting operations. There is no need for the operator to carry the riser tube as a whole, nor is there any need for the operator to perform other additional operations. This simplifies the liquid lifting process and significantly improves the efficiency of the liquid lifting step.

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

[0005] A nested riser tube for a melting crucible for low-pressure casting of titanium alloys, comprising a graphite sleeve for contacting the molten metal in the melting crucible, and a fixing ring is further provided on the outside of the graphite sleeve;

[0006] A graphite riser tube is sleeved on the inside of the graphite sleeve. The bottom of the graphite riser tube is inserted into the top of the graphite sleeve. A control ring is sleeved on the outside of one end of the graphite riser tube extending out of the graphite sleeve. The outer diameter of the control ring is larger than the inner diameter of the graphite sleeve. A flexible control rope is provided on the control ring. The end of the flexible control rope away from the control ring passes through a fixed ring.

[0007] In the assembled state, the positions of the control ring and the graphite riser tube remain fixed, and the positions of the fixed ring and the graphite sleeve are relatively fixed. When the flexible control rope is pulled in the direction away from the control ring and the fixed ring, the connection point of the flexible control rope and the control ring approaches the fixed ring, and the graphite riser tube extends out of the graphite sleeve.

[0008] Optionally, a flange is integrally formed on the outer side of the top of the graphite sleeve, and the outer diameter of the flange is larger than the outer diameter of the graphite sleeve.

[0009] Optionally, a limit disk is integrally formed on the outer side of the middle portion of the graphite riser tube, and the outer diameter of the limit disk is larger than the inner diameter of the graphite sleeve.

[0010] Optionally, an annular mounting groove is provided on the outer side of the limit plate, the inner diameter of the mounting groove is smaller than the outer diameter of the limit plate, and the control ring is sleeved in the mounting groove. In the assembled state, the top of the inner cavity of the mounting groove fits with the top of the control ring, limiting the movement of the control ring toward the top of the graphite riser tube.

[0011] Optionally, there are multiple flexible control ropes and multiple fixed rings, multiple flexible control ropes are distributed in an annular array on the control ring, multiple fixed rings are distributed in an annular array outside the graphite sleeve, and the multiple flexible control ropes are respectively adapted to the multiple fixed rings.

[0012] Optionally, the outer diameter of the graphite riser tube is smaller than the inner diameter of the graphite sleeve.

[0013] Optionally, the top end of the graphite riser tube is chamfered on the inside.

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

[0015] The embodiment of the present application uses a flexible control rope to control the nested liquid lifting tube to perform liquid lifting operations. There is no need for the operator to carry the liquid lifting tube as a whole, nor is there any need for the operator to perform other additional operations. This simplifies the liquid lifting process and significantly improves the efficiency of the liquid lifting step. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic front view of an embodiment of the present application;

[0017] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the present application.

[0018] Reference numerals: 10, graphite sleeve; 11, flange;

[0019] 20. Fixed ring;

[0020] 30. Graphite riser tube; 31. Limit plate; 32. Mounting slot;

[0021] 40. Control loop;

[0022] 50. Flexible control rope. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1 and attached Figure 2 This application is described in further detail.

[0024] The embodiment of the present application provides a nested liquid level pipe for a smelting crucible for titanium alloy low-pressure casting, which comprises a graphite sleeve 10 for contacting molten metal in the smelting crucible, a graphite liquid level pipe 30 sleeved on the inner side of the graphite sleeve 10, the graphite sleeve 10 and the graphite liquid level pipe 30 are both made of graphite material, the bottom of the graphite liquid level pipe 30 is inserted into the top of the graphite sleeve 10, the bottom and the top of the graphite liquid level pipe 30 are respectively an insertion end and an extension end, and the bottom and the top of the graphite sleeve 10 are respectively a liquid inlet end and an insertion end;

[0025] The outer side of the graphite sleeve 10 is further provided with a fixing ring 20, and the position of the fixing ring 20 is relatively fixed with the graphite sleeve 10;

[0026] The outer side of the end of the graphite liquid level pipe 30 extending out of the graphite sleeve 10 is provided with a control ring 40, the outer diameter of the control ring 40 is greater than the inner diameter of the graphite sleeve 10, a flexible control rope 50 is arranged on the control ring 40, and one end of the flexible control rope 50 away from the control ring 40 passes through the fixing ring 20;

[0027] When the nested liquid level pipe is in a storage state, the connection point position of the control ring 40 and the graphite liquid level pipe 30 is lower than the fixed position of the fixing ring 20;

[0028] In the assembled state, the position of the control ring 40 and the graphite liquid level pipe 30 is fixed, the position of the fixing ring 20 and the graphite sleeve 10 is relatively fixed, when the flexible control rope 50 is pulled in a direction away from the control ring 40 and the fixing ring 20, the connection point of the flexible control rope 50 and the control ring 40 is close to the fixing ring 20, and the graphite liquid level pipe 30 extends out of the graphite sleeve 10.

[0029] The following will be further introduced in combination with a specific use scenario.

[0030] Before use, an operator first fixes the nested liquid level pipe in a molten pool, so that the position among the graphite sleeve 10, the fixing ring 20 and the bottom surface of the molten pool inner cavity remains unchanged, and after installation is completed, continuous casting can be started.

[0031] During continuous casting, the molten metal continuously enters the molten pool, when a mold moves to the upper side of the nested liquid level pipe, the operator pulls the flexible control rope 50, in the case that the position of the fixing ring 20 is fixed, one end of the flexible control rope 50 away from the control ring 40 is pulled, so that the connection point of the flexible control rope 50 and the control ring 40 moves to the direction of the fixing ring 20, because in the storage state of the nested liquid level pipe, the connection point position of the control ring 40 and the graphite liquid level pipe 30 is lower than the fixed position of the fixing ring 20, from the movement state of the graphite liquid level pipe 30, the extension end of the graphite liquid level pipe 30 moves in a direction away from the graphite sleeve 10, until the liquid outlet of the extension end of the graphite liquid level pipe 30 is connected with the liquid inlet of the mold bottom, at this time, vacuum pouring can be carried out.

[0032] It can be found that when lifting the liquid, the operator does not need to move the entire nested lifting tube. The graphite lifting tube 30 can be quickly connected to the liquid inlet at the bottom of the mold by simply pulling the flexible control rope 50, without the operator having to perform any other additional operations.

[0033] In general, the embodiment of the present application uses a flexible control rope 50 to control the nested lifting tube to perform liquid lifting operations. There is no need for the operator to carry the lifting tube as a whole, nor is there any need for the operator to perform other additional operations. This simplifies the liquid lifting step process and significantly improves the efficiency of the liquid lifting step.

[0034] In the embodiment of the present application, there are various ways to fix the fixing ring 20. For example, the fixing ring 20 can be fixed to the inner wall of the outer shell of the molten pool by relying on a bracket, or the fixing ring 20 can be fixed to the outside of the graphite sleeve 10 by relying on a bracket. There are also various ways for the operator to pull the flexible control rope 50. For example, the flexible control rope 50 can be pulled by a winch, or the flexible control rope 50 can be pulled forward by a telescopic rod of a hydraulic device.

[0035] In some possible implementations of the embodiments of the present application, there are multiple flexible control ropes 50 and multiple fixed rings 20, and multiple flexible control ropes 50 are distributed in a circular array on the control ring 40, and multiple fixed rings 20 are distributed in a circular array on the outside of the graphite sleeve 10. The multiple flexible control ropes 50 are respectively adapted to the multiple fixed rings 20. In this way, the multiple circular arrays of fixed rings 20 and flexible control ropes 50 can pull the graphite riser 30 upward from multiple directions, so that the graphite riser 30 can rise along a predetermined ascending route.

[0036] In some possible implementations of the embodiments of the present application, a flange 11 is integrally formed on the outer side of the top of the graphite sleeve 10, and the outer diameter of the flange 11 is larger than the outer diameter of the graphite sleeve 10. In this way, the control ring 40 on the outer side of the graphite riser tube 30 can interfere with the flange 11, so that when the flexible control rope 50 is not controlled by external force, the bottom surface of the control ring 40 on the outer side of the graphite riser tube 30 can contact with the flange 11 to maintain the position of the graphite riser tube 30, forming the initial position of the nested riser tube. On this basis, the outer side of the middle part of the graphite riser tube 30 is integrally formed with a limited position. The outer diameter of the limiting disk 31 is larger than the inner diameter of the graphite sleeve 10, and the control ring 40 is located outside the limiting disk 31. In this way, the component that actually controls the initial position of the graphite riser tube 30 is the limiting disk 31. An annular mounting groove 32 can be opened on the outer side of the limiting disk 31. The inner diameter of the mounting groove 32 is smaller than the outer diameter of the limiting disk 31. The control ring 40 is sleeved in the mounting groove 32. In the assembled state, the top of the inner cavity of the mounting groove 32 is in contact with the top of the control ring 40, limiting the movement of the control ring 40 toward the top of the graphite riser tube 30, making the structure of the entire nested riser tube more reliable.

[0037] In some possible implementation manners of the embodiment of the present application, the outer diameter of the graphite riser pipe 30 is smaller than the inner diameter of the graphite sleeve pipe 10, which makes the part of the graphite riser pipe 30 inside the graphite sleeve pipe 10 can be slightly radially displaced, reduces the friction between the graphite riser pipe 30 and the graphite sleeve pipe 10, and makes the structure of the whole nested riser pipe more reliable.

[0038] In some possible implementation manners of the embodiment of the present application, the top end of the graphite riser pipe 30 is chamfered inside, so that the residual metal liquid can be guided to flow back to the molten pool by the chamfer after the liquid inlet at the bottom of the mold is closed.

[0039] The embodiments of the specific implementation are the preferred embodiments of the present application, but do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A nested riser tube for a melting crucible for low-pressure casting of titanium alloys, characterized in that: It comprises a graphite sleeve (10) for contacting the molten metal in the smelting crucible, and a fixing ring (20) is further provided on the outside of the graphite sleeve (10); A graphite riser tube (30) is sleeved on the inner side of the graphite sleeve (10), the bottom of the graphite riser tube (30) is inserted into the top of the graphite sleeve (10), and a control ring (40) is sleeved on the outer side of one end of the graphite riser tube (30) extending out of the graphite sleeve (10), the outer diameter of the control ring (40) is larger than the inner diameter of the graphite sleeve (10), and a flexible control rope (50) is provided on the control ring (40), and the end of the flexible control rope (50) away from the control ring (40) passes through the fixed ring (20); In the assembled state, the positions of the control ring (40) and the graphite riser tube (30) remain fixed, and the positions of the fixed ring (20) and the graphite sleeve (10) are relatively fixed. When the flexible control rope (50) is pulled in a direction away from the control ring (40) and the fixed ring (20), the connection point between the flexible control rope (50) and the control ring (40) approaches the fixed ring (20), and the graphite riser tube (30) extends out of the graphite sleeve (10).

2. The nested riser tube for a melting crucible for low-pressure casting of titanium alloy according to claim 1, characterized in that: A flange (11) is integrally formed on the outer side of the top of the graphite sleeve (10), and the outer diameter of the flange (11) is larger than the outer diameter of the graphite sleeve (10).

3. The nested riser tube for a melting crucible for low-pressure casting of titanium alloy according to claim 2, characterized in that: A limiting disk (31) is integrally formed on the outer side of the middle portion of the graphite riser tube (30), and the outer diameter of the limiting disk (31) is larger than the inner diameter of the graphite sleeve (10).

4. The nested riser tube for a melting crucible for low-pressure casting of titanium alloy according to claim 3, characterized in that: An annular mounting groove (32) is provided on the outer side of the limiting plate (31), the inner diameter of the mounting groove (32) is smaller than the outer diameter of the limiting plate (31), and the control ring (40) is sleeved in the mounting groove (32). In the assembled state, the top of the inner cavity of the mounting groove (32) fits with the top of the control ring (40), limiting the movement of the control ring (40) toward the top of the graphite riser tube (30).

5. The nested riser tube of a melting crucible for low-pressure casting of titanium alloy according to claim 3, characterized in that: The flexible control rope (50) and the fixing ring (20) are both multiple, the multiple flexible control ropes (50) are distributed in an annular array on the control ring (40), the multiple fixing rings (20) are distributed in an annular array outside the graphite sleeve (10), and the multiple flexible control ropes (50) are respectively adapted to the multiple fixing rings (20).

6. The nested riser tube of a melting crucible for low-pressure casting of titanium alloy according to claim 3, characterized in that: The outer diameter of the graphite riser tube (30) is smaller than the inner diameter of the graphite sleeve (10).

7. The nested riser tube of a melting crucible for low-pressure casting of titanium alloy according to claim 3, characterized in that: The top inner side of the graphite riser tube (30) is chamfered.

Images