Crucible melting machine

Abstract

The utility model belongs to the technical field of crucible manufacturing, and discloses a crucible melting machine which comprises a melting mold, an electrode and a breather pipe, the electrode can extend into the melting mold, and the breather pipe is fixedly connected to the electrode and is configured to convey inert gas to the discharge end of the electrode. Therefore, when the quartz particles are fused by the electrode, air among the quartz particles in the area nearby the discharge end of the electrode is timely extruded out, in the fusion process, the electrode can ascend and descend in the vertical direction, all the quartz particles are fused, the breather pipe can move along with the electrode, and the breather pipe can move along with the electrode. When the crucible is manufactured, the breather pipe always conveys inert gas to the discharge end of the electrode, so that air among quartz particles in the melting mold and impurities attached to the air can be completely discharged in the melting process, the number of microbubbles existing in the manufactured crucible is reduced, impurities in the crucible are reduced, and the quality of the crucible is improved. The quality of the manufactured crucible is improved, and then the service life of the crucible is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of crucible manufacturing, in particular to a crucible melting machine. Background Art

[0002] At present, quartz crucibles are generally manufactured by a crucible melting machine. Specifically, the crucible melting machine includes a melting mold and an electrode. The electrode can extend into the melting mold, so that the crucible is melted in the melting mold by melting quartz particles.

[0003] In order to avoid bubbles inside the melted crucible due to the presence of air between the quartz particles, in the prior art, a vacuum operation is performed before melting the quartz particles to expel the air between the quartz particles. However, it is difficult to completely expel the air between the quartz particles due to the vacuum operation, that is, a trace amount of air still exists between the quartz particles after the vacuum operation, resulting in microbubbles inside the manufactured crucible. Moreover, due to the presence of impurities such as dust in the air, the microbubbles and impurities will affect the quality of the manufactured crucible, and further affect the service life of the crucible.

[0004] Therefore, the above problems need to be solved urgently. Utility Model Content

[0005] The utility model aims to provide a crucible melting machine to solve the problem that a trace amount of air exists between quartz particles, thereby causing microbubbles to exist inside the manufactured crucible, and because impurities such as dust exist in the air, the microbubbles and impurities will affect the quality of the manufactured crucible, thereby affecting the service life of the crucible.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A crucible melting machine comprises a melting mold and an electrode, wherein the electrode can extend into the melting mold. The crucible melting machine also comprises a vent pipe, which is fixedly connected to the electrode and configured to transport an inert gas to a discharge end of the electrode.

[0008] Preferably, the electrode comprises a graphite electrode and a metal electrode, the graphite electrode is fixedly connected to the end of the metal electrode, the graphite electrode can extend into the melting mold, the discharge end is formed at the end of the graphite electrode away from the metal electrode, a channel is provided inside the graphite electrode, one end of the channel is connected to the vent pipe, the other end of the channel forms an exhaust port, and the exhaust port is opened at the end of the graphite electrode away from the metal electrode.

[0009] Preferably, the electrode further comprises a graphite joint, wherein the graphite joint is sleeved on the outer circumference of the graphite electrode and the metal electrode, and the graphite electrode and the metal electrode have a gap along the axial direction of the electrode, and the graphite joint is provided with a perforation, wherein the perforation connects the vent pipe and the gap, and an air inlet is formed at one end of the channel away from the discharge end, and the air inlet is opened at one end of the graphite electrode close to the metal electrode, and the air inlet is connected to the gap.

[0010] Preferably, the graphite joint is provided with a first screw hole and a second screw hole on both sides along its axial direction, the metal electrode and the graphite electrode are screwed into the first screw hole and the second screw hole respectively, and a through hole is also provided on the graphite joint, the through hole is formed between the first screw hole and the second screw hole, and the through hole is connected to the through hole.

[0011] Preferably, the channel extends along the axial direction of the graphite electrode.

[0012] Preferably, the ventilation pipe is a straight pipe.

[0013] Preferably, the crucible melting machine further comprises a clamp configured to fix the vent pipe to the electrode.

[0014] Preferably, the vent pipe and the clamp are both made of insulating and high-temperature resistant materials.

[0015] Preferably, the inert gas is argon.

[0016] Preferably, the crucible melting machine comprises a plurality of the electrodes, and all the electrodes are fixedly connected with the ventilation pipe.

[0017] Beneficial effects of the utility model: In the utility model, the vent pipe is fixedly connected to the electrode and is configured to transport inert gas to the discharge end of the electrode, so that when the electrode melts the quartz particles, the air between the quartz particles in the vicinity of the discharge end of the electrode can be squeezed out in time, and the vent pipe can move with the electrode, and the vent pipe will always transport inert gas to the discharge end of the electrode, so that during the melting process, the air between the quartz particles in the melting mold and the impurities attached to the air can be discharged, thereby reducing the number of microbubbles in the crucible and the impurities in the crucible, so as to improve the quality of the crucible and thus improve the service life of the crucible. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a crucible melting machine in an embodiment of the utility model;

[0019] Figure 2 yes Figure 1A partial enlarged view of the middle A;

[0020] Figure 3 It is a schematic diagram of the structure of the graphite electrode in the embodiment of the utility model;

[0021] Figure 4 is a cross-sectional view of a graphite electrode in an embodiment of the utility model along its longitudinal section;

[0022] Figure 5 It is a schematic diagram of the structure of a graphite joint in an embodiment of the utility model;

[0023] Figure 6 It is a cross-sectional view of a graphite joint in an embodiment of the utility model along its longitudinal section.

[0024] In the figure:

[0025] 110. melting mold; 120. electrode; 121. graphite electrode; 1211. channel; 1212. exhaust port; 1213. air inlet; 122. metal electrode; 123. graphite joint; 1231. perforation; 1232. first screw hole; 1233. second screw hole; 1234. through hole; 130. vent pipe; 140. clamp. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0030] See also Figures 1 to 6 This embodiment provides a crucible melting machine, which includes a melting mold 110 and an electrode 120 . The electrode 120 can extend into the melting mold 110 to melt quartz particles in the melting mold 110 .

[0031] In addition to the melting mold 110 and the electrode 120, the crucible melting machine in this embodiment also includes a vent pipe 130, which is fixedly connected to the electrode 120 and is configured to transport inert gas to the discharge end of the electrode 120, so that when the electrode 120 melts the quartz particles, the air between the quartz particles in the vicinity of the discharge end of the electrode 120 is squeezed out in time. During the melting process, the electrode 120 will rise and fall in the vertical direction to melt all the quartz particles, and the vent pipe 130 can move with the electrode 120. Moreover, the vent pipe 130 will always transport inert gas to the discharge end of the electrode 120, so that the air between the quartz particles in the melting mold 110 and the impurities attached to the air can be discharged during the melting process, thereby reducing the number of microbubbles in the manufactured crucible and reducing the impurities in the crucible, so as to improve the quality of the manufactured crucible and thus improve the service life of the crucible.

[0032] It is understandable that, compared to air, inert gas can be easily completely extracted by vacuuming, and therefore, the squeezed air can be discharged together with the inert gas.

[0033] In this embodiment, the inert gas is preferably argon. Of course, in other optional embodiments, the inert gas may also be helium or other inert gases, which is not specifically limited in this embodiment.

[0034] Furthermore, the crucible melting machine in this embodiment includes a plurality of electrodes 120, and all electrodes 120 are fixedly connected with ventilation pipes 130, so that when the electrodes 120 melt the quartz particles, the air between the quartz particles in the vicinity of the discharge end of any electrode 120 is squeezed out in time, so as to further ensure that the air between the quartz particles in the melting mold 110 and the impurities attached to the air are completely discharged during the melting process, thereby further reducing the number of microbubbles existing in the manufactured crucible and further reducing the impurities inside the crucible.

[0035] It is worth noting that the electrode 120 includes a graphite electrode 121 and a metal electrode 122 . The graphite electrode 121 is fixedly connected to the end of the metal electrode 122 . The graphite electrode 121 can extend into the melting mold 110 , and the discharge end is formed at one end of the graphite electrode 121 away from the metal electrode 122 .

[0036] In this embodiment, a channel 1211 is provided inside the graphite electrode 121, one end of the channel 1211 is connected to the ventilation pipe 130, and the other end of the channel 1211 forms an exhaust port 1212. The exhaust port 1212 is opened at one end of the graphite electrode 121 away from the metal electrode 122, so that the ventilation pipe 130 can transport inert gas to the discharge end of the electrode 120.

[0037] In addition, the electrode 120 further includes a graphite joint 123, which is sleeved on the outer periphery of the graphite electrode 121 and the metal electrode 122, and the graphite electrode 121 and the metal electrode 122 have a gap along the axial direction of the electrode 120, and the graphite joint 123 is provided with a perforation 1231, the perforation 1231 communicates with the vent pipe 130 and the gap, and the end of the channel 1211 away from the discharge end forms an air inlet 1213, and the air inlet 1213 is opened at the graphite electrode 121 near the metal electrode 122. At one end, the air inlet 1213 is connected to the gap. On the one hand, the graphite joint 123 can conduct electricity between the metal electrode 122 and the graphite electrode 121. On the other hand, the inert gas transported along the vent pipe 130 can enter the air inlet 1213 through the gap between the metal electrode 122 and the graphite electrode 121, and be transported to the discharge end of the electrode 120, so as to squeeze out the air between the quartz particles in the vicinity of the discharge end of the electrode 120 in time when the electrode 120 melts the quartz particles.

[0038] Furthermore, the graphite joint 123 is provided with a first screw hole 1232 and a second screw hole 1233 on both sides along its axial direction, and the metal electrode 122 and the graphite electrode 121 are screwed into the first screw hole 1232 and the second screw hole 1233 respectively, thereby ensuring that the metal electrode 122 and the graphite electrode 121 can be fixedly connected to the graphite joint 123. A through hole 1234 is also provided on the graphite joint 123, and the through hole 1234 is formed between the first screw hole 1232 and the second screw hole 1233, thereby forming a gap between the metal electrode 122 and the graphite electrode 121, and the through hole 1234 is connected to the through hole 1231.

[0039] Based on the above, in this embodiment, the channel 1211 extends along the axial direction of the graphite electrode 121 , thereby ensuring that the inert gas can flow smoothly along the channel 1211 inside the graphite electrode 121 and avoiding the backflow of the inert gas in the graphite electrode 121 .

[0040] Furthermore, the ventilation pipe 130 is a straight pipe, thereby ensuring that the inert gas can flow smoothly along the ventilation pipe 130 and avoiding the backflow of the inert gas in the ventilation pipe 130. Based on the above, this embodiment can ensure that the inert gas can flow smoothly from the gas source located at the upstream end of the ventilation pipe 130 to the discharge end of the electrode 120.

[0041] Preferably, in this embodiment, the crucible melting machine further comprises a clamp 140 , which is configured to fix the vent pipe 130 to the electrode 120 , that is, in this embodiment, the vent pipe 130 is fixed to the electrode 120 by the clamp 140 , thereby facilitating the disassembly and assembly of the vent pipe 130 .

[0042] In addition, the vent pipe 130 and the clamp 140 are both made of insulating high temperature resistant materials, thereby avoiding the problem of sparks between the vent pipe 130 and the clamp 140 and the electrode 120, thereby ensuring that the electrode 120 can work normally.

[0043] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A crucible melting machine, comprising a melting mold (110) and an electrode (120), wherein the electrode (120) can extend into the melting mold (110), characterized in that: The crucible melting machine further comprises a vent pipe (130), the vent pipe (130) being fixedly connected to the electrode (120) and configured to deliver an inert gas to a discharge end of the electrode (120), the electrode (120) comprising a graphite electrode (121) and a metal electrode (122), the graphite electrode (121) being fixedly connected to an end of the metal electrode (122), and the graphite electrode (121) being capable of extending into the melting mold (110) The discharge end is formed at an end of the graphite electrode (121) away from the metal electrode (122), a channel (1211) is provided inside the graphite electrode (121), one end of the channel (1211) is connected to the ventilation pipe (130), and the other end of the channel (1211) forms an exhaust port (1212), and the exhaust port (1212) is opened at an end of the graphite electrode (121) away from the metal electrode (122).

2. The crucible melting machine according to claim 1, characterized in that: The electrode (120) further comprises a graphite joint (123), wherein the graphite joint (123) is sleeved on the outer circumference of the graphite electrode (121) and the metal electrode (122), and the graphite electrode (121) and the metal electrode (122) have a gap along the axial direction of the electrode (120), and the graphite joint (123) is provided with a through hole (1231), wherein the through hole (1231) is connected to the vent pipe (130) and the gap, and an air inlet (1213) is formed at one end of the channel (1211) away from the discharge end, and the air inlet (1213) is opened at one end of the graphite electrode (121) close to the metal electrode (122), and the air inlet (1213) is connected to the gap.

3. The crucible melting machine according to claim 2, characterized in that: The graphite joint (123) is provided with a first screw hole (1232) and a second screw hole (1233) on both sides along its axial direction, respectively; the metal electrode (122) and the graphite electrode (121) are screwed into the first screw hole (1232) and the second screw hole (1233) respectively; the graphite joint (123) is also provided with a through hole (1234), the through hole (1234) is formed between the first screw hole (1232) and the second screw hole (1233), and the through hole (1234) is connected with the through hole (1231).

4. The crucible melting machine according to claim 1, characterized in that: The channel (1211) extends along the axial direction of the graphite electrode (121).

5. The crucible melting machine according to claim 4, characterized in that: The ventilation pipe (130) is a straight pipe.

6. The crucible melting machine according to claim 1, characterized in that: The crucible melting machine also includes a clamp (140) configured to fix the vent tube (130) to the electrode (120).

7. The crucible melting machine according to claim 6, characterized in that: The ventilation pipe (130) and the clamp (140) are both made of insulating and high-temperature resistant materials.

8. The crucible melting machine according to claim 1, characterized in that: The inert gas is argon.

9. The crucible melting machine according to claim 1, characterized in that: The crucible melting machine comprises a plurality of electrodes (120), and all the electrodes (120) are fixedly connected with the ventilation pipe (130).

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