Quartz crucible melting device and automatic ash removal device thereof

Abstract

The utility model discloses a quartz crucible founding device and an automatic ash removal device thereof, relates to the technical field of ash removal devices, and aims to solve the problems of incomplete manual ash removal effect and poor stability, the automatic ash removal device comprises a controller, and also comprises an ash blowing device and an ash suction device which are in signal connection with the controller, the soot blowing device and the soot suction device are both arranged on the heat insulation plate, the heat insulation plate is provided with a receding hole, the receding hole is provided with a movable electrode, the soot blowing device and the soot suction device are symmetrically arranged on the two sides of the receding hole, the soot blowing device is used for blowing away lime attached to the electrode, and the soot suction device is used for sucking away the lime. The controller is used for controlling the ash blowing device and the ash suction device to remove lime (lime skin) generated during melting of the quartz crucible, so that the problem that the ash removal effect is not thorough due to unstable manual operation is solved, and the ash removal process of the automatic ash removal device controlled by the controller is more stable than that of manual ash removal.

Description

Technical Field

[0001] The utility model relates to the technical field of ash removal devices, and more specifically, to a quartz crucible melting device and an automatic ash removal device thereof. Background Art

[0002] When melting quartz sand into a quartz crucible, some quartz sand or silicon dioxide vapor volatilizes. When encountering a graphite electrode, it will gradually adsorb quartz particles to form white ash (skin). When the white ash (skin) accumulates thicker and thicker, it will fall off the graphite electrode due to gravity and fall into the quartz crucible being melted. The white ash (skin) falling into the quartz crucible will remelt in the quartz crucible to form a morphology of accumulated fine bubble groups, which is a white spot. The existence of white spots is very likely to introduce trace impurities existing in graphite, which is a direct pollution to high-purity crucibles and will affect the stability of the subsequent crystal pulling process, etc. At the same time, due to the existence of a large number of fine bubbles in the white spots, the escape of bubbles will directly cause edge breakage and wire breakage.

[0003] The existing solution for removing the white ash (skin) adhered to the electrode is to observe in real time whether the graphite electrode is adhered with white ash (skin) in a high-temperature resistant and light-filtering monitoring image. If it is found that a relatively thick white ash (skin) has adhered, the white ash part of the graphite electrode should be lifted to the air blowing pipe in time, and the air blowing pipe should be turned on to blow the electrode in real time. After the white ash (skin) on the graphite electrode is blown clean, the graphite electrode is moved to the normal working position to continue melting, and the air blowing pipe is closed. During the melting process, the operator should observe the adsorption situation of the white ash (skin) in real time, monitor and operate in real time. During the whole melting process, this action is cycled 3 - 8 times, which has a strong dependence on the operator's operation, poor stability, incomplete removal effect, and a high incidence of abnormal white spots.

[0004] Therefore, how to solve the problems of incomplete artificial ash removal effect and poor stability is an urgent problem to be solved by those skilled in the art at present. Summary of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide an automatic ash removal device, which removes the white ash (skin) generated during the melting of the quartz crucible through automatic control, so as to solve the problem of incomplete ash removal effect caused by unstable manual operation, and mechanical control of ash removal is more stable than manual ash removal.

[0006] Another purpose of the present utility model is to provide a quartz crucible melting device including the above automatic ash removal device, which can realize an effective ash removal process during the melting process of the quartz crucible.

[0007] In order to achieve the above purpose, the present utility model provides the following technical solutions:

[0008] An automatic dust removal device comprises: a controller, a dust blowing device and a dust sucking device both of which are connected to the controller signal, the dust blowing device and the dust sucking device are both arranged on a heat insulation board, the heat insulation board is provided with a clearance hole, the clearance hole is provided with a movable electrode, the dust blowing device and the dust sucking device are symmetrically arranged on both sides of the clearance hole, the dust blowing device is used to blow away the white dust attached to the electrode, and the dust sucking device is used to suck away the white dust.

[0009] Preferably, the soot blowing device includes an air inlet end connected to three blowing pipes, each of which is provided with a regulating valve connected to a controller signal, and the end of the blowing pipe close to the make way hole is connected to an air outlet structure, and the three air outlet structures are arranged around one side of the make way hole.

[0010] Preferably, the air outlet structure includes three tube bodies forming a mountain-shaped structure, the tube bodies are arranged parallel to the heat insulation board, and the ends of the tube bodies are provided with air outlets, and the air outlets are arranged close to the clearance holes.

[0011] Preferably, the wind speed of the air outlet structure is 8-18 m / s, and the radiation height range of the air outlet structure is 30 mm above the end surface of the insulation board.

[0012] Preferably, the ash suction device comprises an ash suction pipe, the ash inlet of the ash suction pipe is an arc-shaped opening, which is arranged around the other side of the yield hole, and the ash suction pipe is provided with an induced draft fan connected to the controller signal.

[0013] Preferably, the ash outlet of the ash suction pipe is provided with a pulse dust removal device connected to the controller signal, the pulse dust removal device includes a filter bag chamber, a filter bag is arranged in the filter bag chamber, the filter bag is used to filter dust entering the filter bag chamber, the filter bag chamber has an air inlet and an air outlet, the air inlet is arranged at the bottom of the filter bag chamber and connected to the ash outlet, the air outlet is arranged at the top of the filter bag chamber and connected to the air outlet pipe, the filter bag chamber is also provided with a pulse blowing device connected to the controller signal, the pulse blowing device is arranged at the top of the filter bag chamber for spraying the filter bag, a dust hopper is provided at the bottom of the filter bag chamber, a dust box is provided at the bottom of the dust hopper, the dust box has an openable and closable end cover, and when the end cover is opened, the dust box is connected to the filter bag chamber through the dust hopper.

[0014] A quartz crucible melting device comprises any one of the above-mentioned automatic ash removal devices, a graphite mold is arranged below the heat insulation plate, the lower end of the graphite mold is fixed to a rotating table and rotates with the rotating table, the rotating table is connected to a controller signal, and a water-cooled mold is arranged on the outer wall of the graphite mold.

[0015] Preferably, it also includes a lifting device for driving the electrode to move up and down, the lifting device is connected to the controller signal, and the output end of the lifting device is provided with a mounting bracket for mounting the electrode.

[0016] Preferably, it also includes a position sensor for real-time monitoring of the electrode position, which sends the monitored electrode position signal to the controller in real time. The monitoring range of the position sensor is 50 mm above the upper end surface of the insulation board to 50 mm below the lower end surface of the insulation board.

[0017] Preferably, it also includes a feeding device connected to the controller signal, the feeding device includes: a storage bin, the storage bin has a discharge port, the discharge port is provided with a valve for controlling the discharge amount, the valve is connected to the controller signal, the discharge port is connected to the feed pipe through a rotary joint, and the feed pipe is arranged in the graphite mold.

[0018] The automatic dust removal device provided by the utility model comprises a controller, and also comprises a dust blowing device and a dust sucking device which are both connected to the controller signal. The operation states of the dust blowing device and the dust sucking device are controlled by the controller. The dust blowing device is used to blow away the white dust (skin) attached to the electrode to separate the white dust (skin) from the electrode. The dust sucking device is used to suck away the white dust (skin) blown away by the dust blowing device to prevent the white dust (skin) from floating in the working space of the electrode.

[0019] The soot blowing device and the soot sucking device are both arranged on the insulation board. The insulation board is provided with a clearance hole. The clearance hole is provided with a movable electrode. By arranging the clearance hole on the insulation board, space is provided for the movement of the electrode. The soot blowing device and the soot sucking device are symmetrically arranged on both sides of the clearance hole. The soot blowing device is used to blow away the white ash attached to the electrode, and the ash sucking device is used to suck away the white ash. The soot blowing device blows away the white ash attached to the electrode and the ash sucking device sucks it away. The soot blowing device and the ash sucking device are symmetrically arranged on both sides of the clearance hole so that the soot blowing direction of the soot blowing device and the ash sucking direction of the ash sucking device are in the same direction to ensure that the white ash (skin) blown off by the soot blowing device can be directly sucked into the ash sucking device to avoid the white ash (skin) escaping in the working environment of the electrode. When it is necessary to blow soot to the electrode, the controller controls the soot blowing device and the ash sucking device to operate to blow off and suck away the white ash (skin) on the electrode. Compared with manual ash removal, the ash removal effect is better and the stability is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A top view of the automatic dust removal device provided by the utility model;

[0022] Figure 2 This is a front view of the automatic dust removal device provided by the utility model.

[0023] Reference numerals:

[0024] 1 - Soot blowing device, 11 - Soot blowing pipe, 12 - Regulating valve, 13 - Air outlet structure, 131 - Air outlet;

[0025] 2 - Ash suction device, 21 - Ash suction pipe, 22 - Ash inlet;

[0026] 3 - Heat insulation plate, 31 - Relief hole;

[0027] 4 - Electrode;

[0028] 5 - Intake end;

[0029] 6 - Water - cooled mold;

[0030] 7 - Mounting bracket. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] It should be noted that the following orientation terms such as "upper" and "lower" are defined based on the accompanying drawings of the specification.

[0034] The core of the present invention is to provide an automatic ash removal device, which removes the white ash (skin) generated during the melting of quartz crucibles through automatic control, so as to solve the problem of incomplete ash removal caused by unstable manual operation, and mechanical control of ash removal is more stable than manual ash removal. Another core of the present invention is to provide a quartz crucible melting device including the above - mentioned automatic ash removal device, which can realize an effective ash removal process during the quartz crucible melting process.

[0035] Please refer to Figure 1 and Figure 2An automatic dust removal device includes a controller, and also includes a dust blowing device 1 and a dust sucking device 2, both of which are connected to the controller signal. The controller controls the operating status of the dust blowing device 1 and the dust sucking device 2. The dust blowing device 1 is used to blow away the white dust (skin) attached to the electrode 4, so that the white dust (skin) is separated from the electrode 4. The dust sucking device 2 is used to suck away the white dust (skin) blown away by the dust blowing device 1, so as to prevent the white dust (skin) from floating in the working space of the electrode 4.

[0036] The soot blowing device 1 and the soot sucking device 2 are both arranged on the heat insulation board 3, the heat insulation board 3 is provided with a clearance hole 31, and the clearance hole 31 is provided with a movable electrode 4. By arranging the clearance hole 31 on the heat insulation board 3, a space is provided for the movement of the electrode 4. The soot blowing device 1 and the soot sucking device 2 are symmetrically arranged on both sides of the clearance hole 31. The soot blowing device 1 is used to blow away the white ash attached to the electrode 4, and the soot sucking device 2 is used to suck away the white ash. The soot blowing device 1 blows away the white ash attached to the electrode 4, and the soot sucking device 2 sucks away the white ash. The soot blowing device 1 and the soot sucking device 2 are symmetrically arranged on both sides of the clearance hole 31, so that the soot blowing direction of the soot blowing device 1 and the soot sucking direction of the soot sucking device 2 are in the same direction, so as to ensure that the white ash (skin) blown off by the soot blowing device 1 can be directly sucked into the soot sucking device 2, and avoid the white ash (skin) from escaping in the working environment of the electrode 4. When it is necessary to blow soot on the electrode 4, the controller controls the soot blowing device 1 and the soot sucking device 2 to operate, so as to blow off and suck away the white ash (skin) on the electrode 4, which has a better ash removal effect and higher stability than manual ash removal.

[0037] The electric arc of the electrode 4 is used as a heat source to melt the quartz sand. In the process of melting the quartz sand, part of the quartz sand or silicon dioxide vapor evaporates. When it meets the electrode 4, it will gradually absorb the quartz particles to form white ash (skin). The white ash attached to the electrode 4 is blown off by the soot blowing device 1, and the blown off white ash is sucked away by the soot suction device 2 to ensure that the melting space does not suspend and float the white ash (skin), and to prevent the white ash (skin) from falling into the molten quartz sand, resulting in white spots on the obtained quartz crucible.

[0038] The automatic ash removal device arranged in the above manner can realize the real-time and continuous automatic purging of the white ash (skin) on the electrode 4 through automated settings, and can simultaneously collect the purged white ash (skin) during the melting of the quartz crucible to prevent the white ash (skin) from being suspended and floating in the closed melting space, so that the ash removal effect is thorough and the ash removal is more stable.

[0039] In the above embodiment, the soot blowing device 1 includes an air inlet end 5, which is connected to three blowing pipes 11. The blowing pipes 11 are each provided with a regulating valve 12 connected to a controller signal. The end of the blowing pipe 11 close to the make way hole 31 is connected to an air outlet structure 13, and the three air outlet structures 13 are arranged around one side of the make way hole 31.

[0040] It should be noted that ventilation is conducted into the blowing pipe 11 through the air inlet end 5, and the opening of the regulating valve 12 on the blowing pipe 11 is controlled by the controller. When there is more white ash (skin) on the electrode 4, the opening of the regulating valve 12 is controlled to increase so as to increase the air volume discharged from the air outlet structure 13. When there is less white ash (skin) on the electrode 4, the opening of the regulating valve 12 is controlled to decrease so as to reduce the air volume discharged from the air outlet structure 13. The opening of the regulating valve 12 is controlled by the controller, and the air volume of the air outlet structure 13 is further controlled, so that it is suitable for blowing white ash (skin) to different degrees, and the purpose of energy saving can be achieved while realizing effective soot blowing.

[0041] Among them, three air outlet structures 13 are arranged around one side of the make way hole 31, which can blow off the white ash (skin) on one side of the electrode 4. The ash suction device 2 is arranged opposite to the ash blowing device 1, and the ash suction device 2 is located on the other side of the make way hole 31 of the insulation board 3. The ash suction device 2 can suck away the white ash (skin) on the other side of the electrode 4, and at the same time suck away the white ash (skin) blown away by the air outlet structure 13. The air outlet structure 13 is arranged in this way and cooperates with the ash suction device 2 to blow off all the white ash (skin) on the electrode 4 and suck it out of the closed melting space.

[0042] In the above case, the air outlet structure 13 includes three tubes forming a mountain-shaped structure. The tubes are arranged parallel to the heat insulation board 3 . The ends of the tubes have air outlets 131 . The air outlets 131 are arranged close to the clearance holes 31 .

[0043] It is understandable that each air outlet structure 13 has three air outlets 131, and the air outlets 131 of the three air outlet structures 13 are arranged around one side of the clearance hole 31 so that the wind from the air outlet 131 can sweep to one side of the electrode 4 and blow away the white ash (skin) on one side of the electrode 4.

[0044] Among them, in this embodiment, the air outlet structure 13 includes three tubes forming a mountain-shaped structure and the tubes are arranged parallel to the insulation board 3, but in practical applications, there is no limitation to this as long as the above-mentioned technical effect can be achieved.

[0045] Furthermore, the wind speed of the air outlet structure 13 is 8-18 m / s, and the radiation height range of the air outlet structure 13 is 30 mm above the end surface of the heat insulation board 3 .

[0046] It should be noted that the opening of the regulating valve 12 is controlled by the controller to control the wind speed of the air outlet 131 to preferably 8-18 m / s to ensure that the white ash (skin) on the electrode 4 is blown away, and the radiation height range of the air outlet 131 is preferably 30 mm above the end surface of the insulation board 3 so that the white ash (skin) on the electrode 4 can be completely blown away.

[0047] Among them, in this embodiment, the wind speed of the air outlet structure 13 is 8-18m / s, and the radiation height range of the air outlet structure 13 is 30mm above the end surface of the insulation board 3, but in practical applications, there is no limitation to this as long as the above technical effects can be achieved.

[0048] In the above embodiment, the ash suction device 2 includes an ash suction pipe 21, the ash inlet 22 of the ash suction pipe 21 is an arc-shaped opening, which is arranged on the other side of the clearance hole 31, and the ash suction pipe 21 is provided with an induced draft fan connected to the controller signal.

[0049] It can be understood that by setting the soot blowing pipe as an arc-shaped opening and surrounding the other side of the make way hole 31, the white ash (skin) on the other side of the electrode 4 can be sucked away. The arc-shaped opening is arranged opposite to the air outlet 131 and is fully surrounded on both sides of the make way hole 31, that is, the circumference of the electrode 4, so as to achieve effective blowing of the white ash (skin) on the electrode 4.

[0050] On the basis of the above embodiment, the ash outlet of the ash suction pipe 21 is provided with a pulse dust removal device connected to the controller signal, the pulse dust removal device includes a filter bag chamber, a filter bag is arranged in the filter bag chamber, the filter bag is used to filter the dust entering the filter bag chamber, the filter bag chamber has an air inlet and an air outlet, the air inlet is arranged at the bottom of the filter bag chamber and connected to the ash outlet, the air outlet is arranged at the top of the filter bag chamber and connected to the air outlet pipe, the filter bag chamber is also provided with a pulse blowing device connected to the controller signal, the pulse blowing device is arranged at the top of the filter bag chamber, and is used to blow the filter bag, a dust hopper is provided at the bottom of the filter bag chamber, a dust box is provided at the bottom of the dust hopper, and the dust box has an openable and closable end cover, and when the end cover is opened, the dust box is connected to the filter bag chamber through the dust hopper.

[0051] It should be noted that the ash suction pipe 21 sucks the white ash (skin) that is blown off the electrode 4 out of the closed melting space, and the white ash (skin) enters the pulse dust removal device through the ash outlet of the ash suction pipe 21. The white ash (skin) that enters the filter bag chamber is filtered by the filter bag, leaving the white ash (skin) in the filter bag, and the filtered gas is discharged into the atmosphere from the outlet pipe through the air outlet of the filter bag chamber. At the same time, the controller controls the operation of the pulse blowing device to blow the filter bag, so that the white ash (skin) in the filter bag enters the dust hopper, and falls into the dust box after passing through the dust hopper, and the white ash (skin) is collected by the dust box.

[0052] In this embodiment, the dust box is replaceably arranged at the bottom of the dust hopper. When a dust box is full of white ash (leather), a new dust box is replaced at the bottom of the dust hopper.

[0053] In one embodiment, the pulse dust removal device can be replaced by other devices for collecting white ash (skin), without limitation, as long as the above-mentioned technical effects can be achieved.

[0054] A quartz crucible melting device includes the above-mentioned automatic ash removal device. A graphite mold is provided below the heat insulation plate 3. The lower end of the graphite mold is fixed to the rotating table and rotates with the rotating table. The rotating table is signal-connected to the controller. A water-cooled mold 6 is sleeved on the outer wall of the graphite mold.

[0055] It can be understood that when melting the quartz crucible, the electrode 4 is at a certain position above the graphite mold. The quartz in the graphite mold is melted through the electrode 4. At the same time, the rotating table is controlled by the controller to rotate, so as to drive the graphite mold fixed on the rotating table to rotate. The centrifugal force formed by the high-speed rotation of the rotating table makes the quartz sand in the graphite mold form the shape of a quartz crucible, and then the quartz sand is melted by the arc of the electrode 4, thereby manufacturing the quartz crucible.

[0056] Among them, a water-cooled mold 6 is sleeved on the outer wall of the graphite mold. Under the high temperature of the electrode 4, the quartz sand is melted in the graphite mold. Under the cooling of the water-cooled mold 6, the molten quartz sand is formed into the shape of a quartz crucible, thereby obtaining the quartz crucible.

[0057] As a preferred implementation manner, it further includes a lifting device for driving the electrode 4 to move up and down. The lifting device is signal-connected to the controller. An installation bracket 7 for installing the electrode 4 is provided at the output end of the lifting device.

[0058] It should be noted that the lifting device is controlled by the controller to operate, so as to drive the installation bracket 7 on the lifting device to lift and lower synchronously, thereby driving the electrode 4 on the lifting bracket to lift and lower synchronously. When it is necessary to melt the quartz in the graphite mold, the lifting device is controlled to operate, driving the electrode 4 to move downward to a certain position above the graphite mold, and then the electrode 4 is energized to generate an arc to melt the quartz in the graphite mold. After the electrode 4 has melted for a certain time, the controller controls the lifting device to operate to drive the electrode 4 to move upward to a certain position, then controls the regulating valve 12 to open and control the opening degree of the regulating valve 12, and at the same time controls the ash suction device 2 to operate, so that the air outlet 131 of the air outlet structure 13 blows air to blow away the white ash (skin) on the electrode 4, so that the ash suction device 2 sucks away the white ash (skin) on the electrode 4. At the same time, the white ash (skin) blown off by the air outlet structure 13 is sucked out of the closed space for melting the quartz crucible by the ash suction device 2, thereby avoiding the generation of white spots on the obtained quartz crucible.

[0059] In the above situation, it further includes a position sensor for real-time monitoring of the position of the electrode 4. The position sensor sends the monitored position signal of the electrode 4 to the controller in real time. The monitoring range of the position sensor is from 50 mm above the upper end face of the heat insulation plate 3 to 50 mm below the lower end face of the heat insulation plate 3.

[0060] It can be understood that the position of the electrode 4 is monitored in real time by a position sensor, and the measured position of the electrode 4 is sent to the controller, and the operating state of other structures of the electrode 4 at the current position is judged by the controller.

[0061] Among them, the position sensor is not drawn in the figure and can be set according to the actual installation situation, and there is no limitation on this. As long as the required monitoring range can be achieved, in this embodiment, the monitoring range of the position sensor is 50 mm above the upper end face of the heat insulation plate 3 to 50 mm below the lower end face of the heat insulation plate 3. However, in actual applications, there is no limitation on this, as long as the above technical effects can be achieved.

[0062] In this embodiment, after the position sensor sends the signal that the electrode 4 has been moved down in place to the controller, the controller controls the operation of the rotating table. Through the cooperation of the electrode 4, the graphite mold, the rotating table and the water-cooled mold 6, a quartz crucible is manufactured. After the position sensor sends the signal that the electrode 4 has been moved up in place to the controller, the controller controls the regulating valve 12 to open, and at the same time controls the operation of the dust suction device 2 to effectively purge the white ash (skin) on the electrode 4.

[0063] In the above embodiment, it further includes a feeding device (not drawn in the figure and can be set according to the actual situation) that is signal-connected to the controller. The feeding device includes: a storage bin, the storage bin has a blanking port, and a valve for controlling the blanking amount is provided at the blanking port. The valve is signal-connected to the controller, and the blanking port is connected to a conveying pipe through a rotary joint, and the conveying pipe is arranged in the graphite mold.

[0064] It should be noted that before melting the quartz crucible, it is necessary to control the feeding device to add a certain amount of quartz sand into the graphite mold through the controller to prepare for melting the quartz crucible by the electrode 4. By controlling the opening degree of the valve through the controller, the amount of quartz sand added from the storage bin into the graphite mold is controlled. The conveying pipe rotates synchronously with the graphite mold, and the quartz sand is melted while being fed, so that the thickness of the obtained quartz crucible is more uniform.

[0065] In the above embodiment, a flow meter (not drawn in the figure and can be set according to the actual situation) that is signal-connected to the controller can be arranged on the conveying pipe. The flow meter monitors the flow rate of the quartz sand in the conveying pipe in real time and sends the monitored data to the controller in real time. The controller further judges and controls the opening degree of the valve.

[0066] In another embodiment, a quality sensor (not shown in the figure and can be set according to actual conditions) signal-connected to the controller can be provided in the storage bin. The storage bin has two spaces, an upper space for storing quartz sand and a lower space where the quality sensor is provided. A material bottle is provided on the quality sensor. A feeding pipe for feeding the material bottle is provided in the upper space, and a control valve signal-connected to the controller is provided on the feeding pipe. The control valve is controlled by the controller to open for feeding the material bottle. The quality of the quartz sand in the material bottle is monitored in real time by the quality sensor, and the monitored data is sent to the controller in real time. After the quality of the quartz sand in the material bottle reaches the requirement, the controller controls the control valve to close, and then controls the discharge valve at the discharge port of the material bottle to open, and feeds the material into the graphite mold through the feeding pipe.

[0067] Except for the quartz crucible melting device disclosed in each of the above embodiments, the structures of other parts of the quartz crucible melting device can refer to the prior art and will not be elaborated herein.

[0068] In summary, for the automatic ash removal device provided by the present utility model, the controller is used to control the opening degree of the regulating valve 12 in real time. Combining with the melting characteristics of the quartz crucible, frequency conversion control of blowing air is realized. In the stage where white spots are likely to appear, the opening degree of the regulating valve 12 is increased to ensure thorough blowing. In the stage where there are fewer white spots, the opening degree of the regulating valve 12 is closed to reduce the heat carried away by the blowing and suction, achieving high efficiency and energy saving. During the process of melting the quartz crucible, there is no need to operate the position and displacement of the electrode 4 in real time or frequently in cooperation with blowing, reducing the operation difficulty. In terms of the implementation effect, the white spot removal rate is significantly improved.

[0069] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0070] The above has introduced in detail a quartz crucible melting device and its automatic ash removal device provided by the present utility model. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. An automatic dust removal device, characterized in that: include: A controller, a soot blowing device (1) and a soot sucking device (2) both of which are connected to the controller by signal, the soot blowing device (1) and the soot sucking device (2) both being arranged on a heat insulation board (3), the heat insulation board (3) being provided with a clearance hole (31), the clearance hole (31) being provided with a movable electrode (4), the soot blowing device (1) and the soot sucking device (2) being symmetrically arranged on both sides of the clearance hole (31), the soot blowing device (1) being used to blow away the white ash attached to the electrode (4), and the soot sucking device (2) being used to suck away the white ash.

2. The automatic dust removal device according to claim 1, characterized in that: The soot blowing device (1) comprises an air inlet end (5), the air inlet end (5) being connected to three air blowing pipes (11), each of the air blowing pipes (11) being provided with a regulating valve (12) connected to a signal of the controller, the end of the air blowing pipe (11) close to the clearance hole (31) being connected to an air outlet structure (13), and the three air outlet structures (13) being arranged around one side of the clearance hole (31).

3. The automatic dust removal device according to claim 2, characterized in that: The air outlet structure (13) comprises at least three tube bodies forming a mountain-shaped structure, the tube bodies are arranged parallel to the heat insulation board (3), the ends of the tube bodies have air outlets (131), and the air outlets (131) are arranged close to the clearance holes (31).

4. The automatic dust removal device according to claim 3, characterized in that: The wind speed of the air outlet structure (13) is 8-18 m / s, and the radiation height range of the air outlet structure (13) is 30 mm above the end surface of the heat insulation board (3).

5. The automatic dust removal device according to claim 1, characterized in that: The ash suction device (2) comprises an ash suction pipe (21), the ash inlet (22) of the ash suction pipe (21) being an arc-shaped opening so as to surround the other side of the clearance hole (31), and the ash suction pipe (21) is provided with an induced draft fan connected to the controller signal.

6. The automatic dust removal device according to claim 5, characterized in that: The ash outlet of the ash suction pipe (21) is provided with a pulse dust removal device connected to the controller signal, the pulse dust removal device includes a filter bag chamber, a filter bag is arranged in the filter bag chamber, the filter bag is used to filter dust entering the filter bag chamber, the filter bag chamber has an air inlet and an air outlet, the air inlet is arranged at the bottom of the filter bag chamber and connected to the ash outlet, the air outlet is arranged at the top of the filter bag chamber and connected to the air outlet pipe, the filter bag chamber is also provided with a pulse blowing device connected to the controller signal, the pulse blowing device is arranged at the top of the filter bag chamber and is used to blow the filter bag, a dust hopper is arranged at the bottom of the dust hopper, a dust box is arranged at the bottom of the dust hopper, the dust box has an openable and closable end cover, and when the end cover is opened, the dust box is connected to the filter bag chamber through the dust hopper.

7. A quartz crucible melting device, comprising the automatic dust removal device according to any one of claims 1 to 6, characterized in that: A graphite mold is provided below the heat insulation plate (3), the lower end of the graphite mold is fixed to a rotating table and rotates with the rotating table, the rotating table is connected to the controller signal, and the outer wall of the graphite mold is provided with a water-cooling mold (6).

8. The quartz crucible melting device according to claim 7, characterized in that: It also includes a lifting device for driving the electrode (4) to move up and down, the lifting device being connected to the controller signal, and an output end of the lifting device being provided with a mounting bracket (7) for mounting the electrode (4).

9. The quartz crucible melting device according to claim 8, characterized in that: It also includes a position sensor for real-time monitoring of the position of the electrode (4), the position sensor sends the monitored position signal of the electrode (4) to the controller in real time, and the monitoring range of the position sensor is 50 mm above the upper end surface of the insulation board (3) to 50 mm below the lower end surface of the insulation board (3).

10. The quartz crucible melting device according to claim 9, characterized in that: It also includes a feeding device connected to the controller signal, the feeding device includes: a storage bin, the storage bin has a discharge port, the discharge port is provided with a valve for controlling the discharge amount, the valve is connected to the controller signal, the discharge port is connected to the feed pipe through a rotary joint, and the feed pipe is arranged in the graphite mold.

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