A degassing device for aluminum solution holding furnace

Abstract

The invention discloses a degassing device for an aluminum solution insulation furnace, belongs to the technical field of aluminum solution insulation furnace structures, and is used for quickly removing oxygen in the aluminum solution insulation furnace; a moving seat moves along a vertical frame to drive a vertical gas delivery pipe to descend, and the gas delivery pipe drives a furnace cover to extend into a furnace body to perform the first step of exhaust; after the furnace cover moves above the surface of the aluminum solution, the amount of oxygen in contact with the surface of the aluminum solution can be directly and greatly reduced, and the oxygen is squeezed into a closed cover along a gap between the furnace cover and the furnace body; as a nitrogen output device inputs nitrogen into the middle of the furnace cover along an output pipe, the nitrogen diffuses from the middle of the furnace cover, and waste gas and oxygen are directly squeezed from the middle of the furnace cover and flow into the closed cover along the outer edge of the furnace cover, so as to realize rapid deoxygenation of the surface of the aluminum solution; as the nitrogen is further input, the nitrogen fills the closed cover, so that the presence of nitrogen in the gap between the furnace cover and the furnace body can be maintained for a long time, and the anti-oxidation effect of the surface of the aluminum solution is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum solution insulation furnace structures, and in particular relates to a degassing device for an aluminum solution insulation furnace. Background Art

[0002] Aluminum liquid holding furnace is a kind of equipment used in the foundry industry, which is mainly used to heat aluminum liquid and maintain the temperature to provide aluminum liquid with stable temperature and quality. This equipment plays an important role in the production process of aluminum products, ensuring that the aluminum liquid has a uniform temperature and good quality before casting. During the insulation process of aluminum liquid, waste gas such as carbon dioxide and methane will be generated. These gases are not only harmful to the environment, but also may pose a threat to the health of operators. The oxygen contained in the air is easy to react with aluminum at high temperature to form alumina, which will not only reduce the purity of aluminum, but also may affect the quality of the final product. Therefore, when the aluminum liquid is insulated, it is very important to isolate the waste gas and remove the oxygen in time.

[0003] The traditional aluminum solution holding furnace discharges waste gas and oxygen by inputting nitrogen. However, the gas space inside the holding furnace is large, and the input of nitrogen can only slowly reduce the proportion of oxygen waste gas, and cannot effectively and quickly discharge all the waste gas and oxygen. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a degassing device for an aluminum solution holding furnace, which can achieve rapid degassing through volume compression and nitrogen input.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention comprises a cylindrical furnace body, the furnace body opening upwards, and a furnace cover, the furnace cover has a hole at the center position, the outer diameter of the furnace cover is smaller than the inner diameter of the furnace body, the furnace cover is connected with a gas pipe at the center position upwards, and the gas pipe is connected to a nitrogen output device through a hose; the present invention also comprises a vertical frame, a movable seat is vertically slidably provided on the vertical frame, a support frame is horizontally extended and fixed on the movable seat, and the gas pipe is fixed on the support frame; the present invention also comprises an annular closed cover with an opening facing downwards, the inner edge of the closed cover is fixedly connected to the top surface of the furnace cover, the inner side of the outer edge of the closed cover is slidably arranged on the outer side of the furnace body, a sealing ring is provided on the inner side of the outer edge of the closed cover, the closed cover is connected with an output pipe, and the output pipe is connected to an exhaust gas collection device, the movable seat drives the furnace cover to move into the furnace body, stops above the surface of the aluminum solution in the furnace body, the nitrogen diffuses from the middle of the bottom surface of the furnace cover through the gas pipe, the exhaust gas is squeezed, flows from the outer edge of the furnace cover into the closed cover, and is finally discharged by the output pipe.

[0007] Furthermore, an electric cylinder is provided on the support frame, and the output end of the electric cylinder extends from the top of the gas pipe into the gas pipe and is connected to a piston head. One side of the top of the gas pipe is connected to a transverse pipe, and the transverse pipe is connected to a hose. The piston head is in a long strip shape. When the electric cylinder is in a retracted state, the transverse pipe is connected to the gas pipe. When the electric cylinder is in an output state, the piston head is blocked in the section between the transverse pipe and the gas pipe. The piston head moves downward along the gas pipe to quickly squeeze the internal gas at the lower end of the gas pipe.

[0008] Furthermore, the output pipe is provided with a one-way valve.

[0009] Furthermore, it also includes an oxide scraping part, which includes a horizontal bar, which is located on the bottom side of the furnace cover, and the middle part of the horizontal bar is connected to a vertical axis upward, and a plurality of baffle beams are fixed around a middle section of the vertical axis, and a ring groove is provided on the inner side of the gas pipe, and the end of the baffle beam is slidably arranged in the ring groove, so that the vertical axis is coaxially rotatable and arranged in the gas pipe, and a guide horizontal shaft is provided on the top of the vertical shaft, and an inner hole is opened upward at the bottom end of the piston head, and a spiral groove is provided on the inner side of the inner hole, and the guide horizontal shaft is slidably arranged in the spiral groove, and as the piston head descends, the horizontal bar rotates on the bottom side of the furnace cover to scrape the oxide on the surface of the aluminum solution in the furnace body onto the side of the horizontal bar, and a baffle is also provided at the lower end of the side of the horizontal bar, and as the furnace cover rises, the oxide is brought out with the baffle.

[0010] Furthermore, rollers with an outer diameter smaller than the width of the spiral groove are rotatably provided at both ends of the guide transverse axis.

[0011] Furthermore, a ball head with an outer diameter equal to the width of the annular groove is provided at the end of the baffle beam.

[0012] The beneficial effects of the present invention are:

[0013] The present invention is used for rapidly removing oxygen in an aluminum solution insulation furnace; a moving seat moves along a vertical frame to drive a vertical gas delivery pipe to descend, and the gas delivery pipe drives a furnace cover to extend into a furnace body to perform the first exhaust. After the furnace cover moves above the surface of the aluminum solution, the amount of oxygen in contact with the surface of the aluminum solution can be directly and greatly reduced, and oxygen is squeezed into a closed cover along a gap between the furnace cover and the furnace body. As a nitrogen output device inputs nitrogen into the middle of the furnace cover along an output pipe, nitrogen diffuses from the middle of the furnace cover, and waste gas and oxygen are directly squeezed from the middle of the furnace cover and flow into the closed cover along the outer edge of the furnace cover, thereby realizing rapid deoxygenation of the surface of the aluminum solution. As nitrogen is further input, the closed cover is filled with nitrogen, and the presence of nitrogen in the gap between the furnace cover and the furnace body can be maintained for a long time, thereby realizing the anti-oxidation effect on the surface of the aluminum solution.

[0014] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0016] Figure 1 This is an overall schematic diagram of a degassing device for an aluminum solution holding furnace according to an embodiment of the present invention;

[0017] Figure 2 A cross-sectional view of a degassing device according to an embodiment of the present invention;

[0018] Figure 3 for Figure 2 A magnified schematic diagram of point A;

[0019] Figure 4 A detailed schematic diagram of an oxide scraping portion according to an embodiment of the present invention;

[0020] Figure 5 for Figure 4 An enlarged schematic diagram of point B;

[0021] Figure 6 for Figure 4 An enlarged schematic diagram of point C;

[0022] The markings in the attached drawings are as follows: 1. furnace body; 2. furnace cover; 3. gas delivery pipe; 31. ring groove; 32. horizontal pipe; 41. vertical frame; 42. movable seat; 43. support frame; 44. electric cylinder; 5. closing cover; 51. sealing ring; 6. output pipe; 61. one-way valve; 7. piston head; 71. inner hole; 72. spiral groove; 8. oxide scraping part; 81. horizontal bar; 82. vertical axis; 83. stop beam; 831. ball head; 84. guide horizontal axis; 841. roller; 85. baffle; 9. nitrogen output equipment. DETAILED DESCRIPTION

[0023] like Figures 1 to 6 As shown, the present invention discloses a degassing device for an aluminum solution holding furnace, comprising a cylindrical furnace body 1, the furnace body 1 opening upward, the furnace body 1 having a conventional metal shell and a high temperature resistant inner tank structure, the inner tank of the furnace body 1 in this application is a cylindrical structure opening upward, such as Figure 2 and Figure 3As shown, it also includes a furnace cover 2, the center of the furnace cover 2 has a hole, the outer diameter of the furnace cover 2 is smaller than the inner diameter of the furnace body 1, the center of the furnace cover 2 is connected to a gas pipe 3, and the gas pipe 3 is connected to the nitrogen output device 9 through a hose; it also includes a vertical frame 41, and a moving seat 42 is vertically slidably provided on the vertical frame 41. The vertical frame 41 can be provided with a track structure, and the moving seat 42 is provided with a roller 841 structure. Under the drive of the motor, the moving seat 42 moves along the vertical frame 41, referring to Figure 1 The movable seat 42 is laterally extended and fixed with a support frame 43, the gas pipe 3 is fixed on the support frame 43, and the gas pipe 3 is in a vertical state. Figure 2 and Figure 3 , and also includes an annular closing cover 5 with an opening facing downward, the inner edge of the closing cover 5 is fixedly connected to the top surface of the furnace cover 2, the inner side of the outer edge of the closing cover 5 is slidably arranged on the outer side of the furnace body 1, and a sealing ring 51 is provided on the inner side of the outer edge of the closing cover 5. The closing cover 5 is connected to an output pipe 6, and the output pipe 6 is connected to the exhaust gas collection equipment. The moving seat 42 drives the furnace cover 2 to move into the furnace body 1 and stops above the surface of the aluminum solution in the furnace body 1. Nitrogen diffuses from the middle of the bottom surface of the furnace cover 2 through the gas delivery pipe 3, and the exhaust gas is squeezed and flows from the outer edge of the furnace cover 2 to the closing cover 5, and is finally discharged by the output pipe 6.

[0024] This degassing device is used to quickly remove oxygen in the aluminum solution insulation furnace; the moving seat 42 moves along the vertical frame 41 to drive the vertical gas pipe 3 to descend, and the gas pipe 3 drives the furnace cover 2 to extend into the furnace body 1 to perform the first exhaust. After the furnace cover 2 moves above the surface of the aluminum solution, the amount of oxygen in contact with the surface of the aluminum solution can be directly greatly reduced, and the oxygen is squeezed into the closed cover 5 along the gap between the two furnace bodies 1 of the furnace cover. As the nitrogen output device 9 inputs nitrogen into the middle of the furnace cover 2 along the output pipe 6, the nitrogen diffuses from the middle of the furnace cover 2, and the exhaust gas and oxygen are directly squeezed from the middle of the furnace cover 2 and flow along the outer edge of the furnace cover 2 to the closed cover 5, so as to achieve rapid deoxygenation of the surface of the aluminum solution. As the nitrogen is further input, the nitrogen fills the closed cover 5, so that the presence of nitrogen in the gap between the furnace cover 2 and the furnace body 1 can be maintained for a long time, so as to achieve the anti-oxidation effect on the surface of the aluminum solution.

[0025] In a further solution, Figure 1 and Figure 2As shown, an electric cylinder 44 is provided on the support frame 43, and the output end of the electric cylinder 44 extends from the top of the gas pipe 3 into the gas pipe 3 and is connected to a piston head 7. One side of the top of the gas pipe 3 is connected to a transverse pipe 32, and the transverse pipe 32 is connected to a hose. The piston head 7 is in a long strip shape. When the electric cylinder 44 is in a retracted state, the transverse pipe 32 is connected to the gas pipe 3. When the electric cylinder 44 is in an output state, the piston head 7 is blocked in the section between the transverse pipe 32 and the gas pipe 3. The piston head 7 moves downward along the gas pipe 3 to quickly squeeze the internal gas at the lower end of the gas pipe 3.

[0026] By setting an electric cylinder 44, the electric cylinder 44 drives the piston head 7 to seal, connect and squeeze the nitrogen in the gas pipe 3. When the piston head 7 blocks the through hole between the cross pipe 32 and the gas pipe 3, the nitrogen is sealed. When the piston head 7 moves upward and leaks out of the through hole, the nitrogen is connected. In the closed state, the electric cylinder 44 continues to output downward, and the piston head 7 compresses the gas in the gas pipe 3 downward, which can quickly press down the nitrogen in the gas pipe 3, and squeeze the gas in the gap between the furnace cover 2 and the furnace body 1 again to discharge the waste gas and oxygen.

[0027] In a further solution, Figure 1 The output pipe 6 is provided with a one-way valve 61, and the one-way valve 61 is used to avoid blocking the gas backflow in the output pipe 6.

[0028] In a further solution, Figure 4 , Figure 5 and Figure 6 As shown, it also includes an oxide scraping portion 8, which includes a horizontal bar 81, which is located on the bottom side of the furnace cover 2, and the middle part of the horizontal bar 81 is connected to a vertical shaft 82 upward, and four blocking beams 83 are fixedly arranged around a middle section of the vertical shaft 82, and a circle of annular groove 31 is arranged on the inner side of the gas delivery pipe 3, and a ball head 831 with an outer diameter equal to the width of the annular groove 31 is arranged at the end of the blocking beam 83, and the end of the blocking beam 83 is slidably arranged in the annular groove 31. Under the obstruction of the blocking beam 83, the vertical shaft 82 is limited in its up and down displacement, so that the vertical shaft 82 is coaxially rotatable and arranged on the gas delivery pipe 3, a guide horizontal axis 84 is provided at the top of the vertical axis 82, an inner hole 71 is upwardly opened at the bottom end of the piston head 7, a spiral groove 72 is provided on the inner side of the inner hole 71, the guide horizontal axis 84 is slidably arranged in the spiral groove 72, and rollers 841 with an outer diameter smaller than the width of the spiral groove 72 are rotatably provided at both ends of the guide horizontal axis 84. As the piston head 7 descends, the horizontal bar 81 rotates at the bottom side of the furnace cover 2 to scrape the oxide on the surface of the aluminum solution in the furnace body 1 onto the side of the horizontal bar 81. A baffle 85 is also provided at the lower end of the side of the horizontal bar 81. As the furnace cover 2 rises, the oxide is brought out with the baffle 85.

[0029] In this solution, by adding the oxide scraping part 8, when the electric cylinder 44 outputs, the piston head 7 moves down, and the nitrogen is sealed, the vertical shaft 82 is driven to rotate, and the furnace cover 2 is displaced above the surface of the aluminum solution of the furnace body 1. When the horizontal bar 81 rotates, the oxide on the surface of the aluminum solution is swept to the side of the horizontal bar 81. Finally, as the furnace cover 2 rises, the oxide adheres to the baffle 85 and the horizontal bar 81, so that the oxide is separated from the aluminum solution. This structure removes the oxide on the surface of the aluminum solution while ensuring the removal of waste gas and oxygen and the sealing state, effectively avoiding the continuous generation of oxides and the oxides remaining in the final aluminum solution.

[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A degassing device for an aluminum solution holding furnace, characterized in that: The invention comprises a cylindrical furnace body (1), the furnace body (1) opening upwards, a furnace cover (2), a hole opening at the center of the furnace cover (2), the outer diameter of the furnace cover (2) being smaller than the inner diameter of the furnace body (1), a gas pipe (3) connected upwards from the center of the furnace cover (2), the gas pipe (3) being connected to a nitrogen output device (9) through a hose; a vertical frame (41), a movable seat (42) being vertically slidably provided on the vertical frame (41), a support frame (43) being horizontally extended and fixed on the movable seat (42), the gas pipe (3) being fixed on the support frame (43); and an annular closed cover (5) opening downwards, the inner edge of the closed cover (5) being fixedly connected to the top surface of the furnace cover (2), the inner side of the outer edge of the closed cover (5) being slidably arranged on the outer side of the furnace body (1), the inner side of the outer edge of the closed cover (5) being provided with a sealing ring (51), the closed cover (5) being connected to an output pipe (6), the output pipe (6) being connected to an exhaust gas collection device, the The movable seat (42) drives the furnace cover (2) to move into the furnace body (1) and stops above the surface of the aluminum solution in the furnace body (1). Nitrogen diffuses from the middle of the bottom surface of the furnace cover (2) through the gas supply pipe (3). The exhaust gas is squeezed and flows from the outer edge of the furnace cover (2) to the closed cover (5) and finally discharged from the output pipe (6). The support frame (43) is provided with an electric cylinder (44). The output end of the electric cylinder (44) extends from the top of the gas supply pipe (3) into the gas supply pipe (3) and is connected to a piston head. (7), one side of the top end of the gas pipe (3) is connected to a transverse pipe (32), the transverse pipe (32) is connected to a hose, the piston head (7) is in a long strip shape, when the electric cylinder (44) is in a retracted state, the transverse pipe (32) is connected to the gas pipe (3), when the electric cylinder (44) is in an output state, the piston head (7) is blocked in the section between the transverse pipe (32) and the gas pipe (3), the piston head (7) moves downward along the gas pipe (3), and quickly squeezes the gas inside the lower end of the gas pipe (3);The furnace cover (2) further comprises an oxide scraping portion (8), wherein the oxide scraping portion (8) comprises a horizontal bar (81), wherein the horizontal bar (81) is located on the bottom side of the furnace cover (2), wherein the middle part of the horizontal bar (81) is upwardly connected to a vertical shaft (82), wherein a plurality of retaining beams (83) are fixedly arranged around a middle section of the vertical shaft (82), wherein an annular groove (31) is arranged on the inner side of the gas supply pipe (3), wherein the end of the retaining beam (83) is slidably arranged in the annular groove (31), so that the vertical shaft (82) is coaxially rotatably arranged in the gas supply pipe (3), and the top end of the vertical shaft (82) is fixedly arranged around a middle section of the vertical shaft (82). A guide horizontal shaft (84) is provided, an inner hole (71) is provided at the bottom end of the piston head (7) facing upward, a spiral groove (72) is provided inside the inner hole (71), and the guide horizontal shaft (84) is slidably arranged in the spiral groove (72). As the piston head (7) descends, the horizontal bar (81) rotates at the bottom side of the furnace cover (2) to scrape oxides on the surface of the aluminum solution in the furnace body (1) onto the side of the horizontal bar (81). A baffle (85) is also provided at the lower end of the side of the horizontal bar (81). As the furnace cover (2) rises, the oxides are carried out along with the baffle (85).

2. The degassing device for aluminum solution holding furnace according to claim 1, characterized in that: The output pipe (6) is provided with a one-way valve (61).

3. The degassing device for aluminum solution holding furnace according to claim 1, characterized in that: Rollers (841) having an outer diameter smaller than the width of the spiral groove (72) are rotatably provided at both ends of the guide transverse shaft (84).

4. The degassing device for aluminum solution holding furnace according to claim 1, characterized in that: The end of the baffle beam (83) is provided with a ball head (831) having an outer diameter equal to the width of the annular groove (31).

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