Plasma fused quartz cylindrical blank forming system

Abstract

The utility model discloses a plasma fused quartz cylindrical blank forming system, which relates to the field of plasma fusion, solves the problem of limited forming effect due to the adoption of a traditional heat source for heating in an existing device, and adopts the following scheme that the plasma fused quartz cylindrical blank forming system comprises a smelting furnace, and a tray system is arranged on the bottom side of the smelting furnace; a plasma device is assembled on the top side of the smelting furnace; a main body of the plasma device is a direct-current non-transfer plasma torch, and the plasma device is provided with four sets of plasma torches; a feeding system is arranged on the left side of the smelting furnace, and a compressed air system and a power supply control system are further arranged on the outer side of the smelting furnace; according to the plasma fused quartz cylindrical blank forming system, through the arrangement of the plasma device, plasma is adopted as a heat source, the melting temperature higher than 2500 DEG C is provided, reliable melting of quartz sand is guaranteed, good fluidity is kept, and the forming effect of quartz is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of plasma melting, in particular to a plasma melting quartz cylindrical blank forming system. Background Art

[0002] During the production process of quartz crucible, quartz sand is usually directly poured into the molding mold, and the quartz sand is flattened and shaped by centrifugal action and manual processing, and then the quartz crucible is melted by passing the electrode to start the arc, and the blank of the quartz crucible is obtained after cooling treatment;

[0003] After searching, the application with patent application number CN202110545213.2 discloses an automatic feeding and molding system for a quartz crucible, including a base, a fixed frame, a screening and feeding mechanism located above the base, and a spraying and molding mechanism located at the lower end of the fixed frame, wherein the screening and feeding mechanism includes a vibration component, a screening component and a feeding component, and the quartz sand raw material will be poured onto the second vibration plate through the delivery funnel in the screening component, and the quartz sand that does not meet the requirements will be screened out by the vibration component, and the quartz sand that meets the requirements will be transported to the spraying and molding mechanism by the feeding component, and the quartz sand will be sprayed evenly layer by layer onto the inner wall surface of the molding mold by the nozzle on the L-shaped spraying pipe by the spraying component, and the molding mold will be driven to rotate by the rotating component to automatically perform a flattening and molding process on the quartz sand;

[0004] The above application document avoids the situation where the inconsistent thickness caused by manual scraping operation affects the quality of the finished quartz crucible by setting up an automatic scraping component. However, the traditional heating heat source is still used, which may lead to limited melting effect of quartz sand, thereby affecting its fluidity and subsequent molding effect.

[0005] Therefore, we proposed a plasma fused silica cylindrical billet forming system. Utility Model Content

[0006] In view of the shortcomings of the prior art, the utility model provides a plasma fused quartz cylindrical blank forming system, which solves the problem that the existing device has limited heating and forming effect by using a traditional heat source.

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: A plasma fused quartz cylindrical billet forming system, comprising a melting furnace, a tray system is provided on the bottom side of the melting furnace, and a plasma device is installed on the top side of the melting furnace;

[0008] The main body of the plasma device is a DC non-transferred plasma torch, and the plasma device is equipped with four sets of plasma torches;

[0009] A feeding system is arranged on the left side of the smelting furnace, and a compressed air system and a power supply control system are also arranged on the outside of the smelting furnace.

[0010] Preferably, the smelting furnace is composed of an outer refractory mold and an inner core mold, and the outer refractory mold and the inner core mold are both composed of a quartz layer, a graphite layer, a heat-resistant layer, a heat-insulating layer and a water-cooled wall layer;

[0011] Among them, the outer dimension of the furnace is Φ2000mm in outer diameter, excluding the net height of the furnace bottom tray drive system of 1600mm, while the inner dimension of the furnace is Φ1000mm in inner diameter and 1200mm in inner clearance; the quartz layer in the outer refractory mold is 30mm, the graphite layer is 100mm, the heat-resistant layer is 100mm, the heat-insulating layer is 200mm, and the water-cooled wall layer is 70mm;

[0012] The inner core mold has a quartz layer of 50mm, a graphite layer of 30mm, a heat-resistant layer of 50mm, and a water-cooling tube with a diameter of 60mm.

[0013] Preferably, the tray system is composed of a lifting drive assembly, a rotating drive assembly and a tray, and a smelting furnace is installed on the top of the tray;

[0014] Among them, the pallet diameter is 630mm, the pallet rotation speed is 1-10rpm, and the pallet lifting stroke is 2000mm.

[0015] Preferably, the lifting drive assembly is composed of a variable frequency motor, a reduction box, a screw lifting slide and an encoder positioning, and the rotating drive assembly is composed of a variable frequency motor and a reduction box.

[0016] Preferably, the feeding system is composed of a servo drive assembly, a sensor and a signal device;

[0017] Among them, the feeding capacity of the feeding system is 60kg / h, the feeding method is water-cooled feeding valve feeding, the feeding adjustment method is frequency conversion adjustment, and two sets are configured.

[0018] Preferably, the compressed air system consists of an air compressor, a dry cooler and a nitrogen generator;

[0019] Among them, the air compressor is a screw air compressor, 10Nm3 / min, 0.8MPa, and the compressor power is 75kW; the dry cooler is 30Nm3 / min, and the refrigerator power is 7hp; the nitrogen generator is a pressure swing adsorption type, 500Nm3 / h, 0.8MPa, and the purity is >99%; it is equipped with four-stage compressed air filtration and automatic drainage and sewage disposal; and the compressed air and compressed nitrogen are each equipped with a gas storage tank.

[0020] Preferably, a flue gas system and a cooling water system are further provided on the outside of the smelting furnace, wherein the flue gas system is composed of a dilution cooling fan, a bag filter, and an induced draft fan, and the cooling water system is composed of a cooling water pump and a chiller;

[0021] Among them, the parameters of the dilution cooling fan are 8000m3 / h, 500Pa, 11kW; the parameters of the bag dust collector are 10000m3 / h, <3kPa, with a soot blowing and ash removal device, compressed air soot blowing; the parameters of the induced draft fan are 10000m3 / h, 5kPa, 37kW; at the same time, the flue gas system is equipped with relevant pipeline valves, sensors and signal devices;

[0022] In addition, the cooling water pump is a horizontal centrifugal pump with a flow rate of 50m3 / h, a head of 125m, and a motor power of 37kW; the parameters of the chiller are a flow rate of 50m3 / h, an inlet and outlet water temperature of 20 / 15℃, a cooling capacity of 300kWth, a refrigerator power of 110kW, and a fan power of 1.5kW×2; medium: primary demineralized water or deionized water; and related sensors and signal devices are configured.

[0023] Preferably, the power control system consists of a power system and a control system, the power system consists of an incoming power supply, a low-voltage distribution cabinet, a low-voltage power control cabinet and a transformer cabinet, and the control system consists of a PLC control cabinet and a central control computer;

[0024] Among them, the incoming power supply is 500kVA, three-phase five-wire, AC380V, 50Hz; there are 3 low-voltage distribution cabinets, 1 group of incoming lines, 4 groups of outgoing frame circuit breakers, 9 groups of molded case circuit breakers, and 20 groups of miniature circuit breakers; low-voltage power supply control cabinets: 6; transformer cabinets: 2, SCB11-630 / 380, 380V / 500V / 500, Yy0d11, AN / AF, half-through 6%; DC power supply control cabinets: 4, 450A / 600VDC.

[0025] The utility model provides a plasma fused quartz cylindrical blank forming system, which has the following beneficial effects:

[0026] 1. The plasma fused quartz cylindrical blank forming system uses plasma as a heat source through the setting of a plasma device to provide a melting temperature higher than 2500°C, thereby ensuring reliable melting of quartz sand and maintaining good fluidity, thereby ensuring the forming effect of quartz, and solving the problem of limited forming effect of the existing device using traditional heat sources;

[0027] 2. The overall operating power and operating temperature of the plasma fused quartz cylindrical billet forming system are flexible and adjustable. The temperature can be adjusted at any time according to the actual process conditions in order to find the optimal working conditions. At the same time, a centralized distributed control system is adopted, and the entire system realizes computer control of the central control and maximizes automatic control. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the utility model;

[0029] Figure 2 It is a structural schematic diagram of the rear view of the utility model.

[0030] In the figure: 1. Melting furnace; 2. Tray assembly; 3. Plasma device; 4. Feed system; 5. Compressed air system; 6. Power control system. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1 and 2 The embodiment of the utility model provides a technical solution: a plasma fused quartz cylindrical billet forming system, comprising a smelting furnace 1, a tray system 2 is arranged at the bottom side of the smelting furnace 1, and a plasma device 3 is installed at the top side of the smelting furnace 1; the main body of the plasma device 3 is a DC non-transferred plasma torch, and the plasma device 3 is equipped with four sets of plasma torches; a feeding system 4 is arranged on the left side of the smelting furnace 1, and a compressed air system 5 and a power control system 6 are also arranged on the outside of the smelting furnace 1;

[0033] Among them, the plasma fused quartz cylindrical blank forming system, through the setting of the plasma device 3, uses plasma as a heat source to provide a melting temperature higher than 2500°C, ensures the reliable melting of quartz sand and maintains good fluidity, ensures the forming effect of quartz, and solves the problem of limited heating and forming effect of the existing device using traditional heat sources.

[0034] Embodiment 2: The smelting furnace 1 is composed of an outer refractory mold and an inner core mold, and both the outer refractory mold and the inner core mold are composed of a quartz layer, a graphite layer, a heat-resistant layer, an insulating layer and a water-cooled wall layer; wherein, the outer dimension of the furnace is an outer diameter of Φ2000mm, and the net height excluding the furnace bottom tray drive system is 1600mm, while the inner dimension of the furnace is an inner diameter of Φ1000mm and an inner clearance of 1200mm; the quartz layer in the outer refractory mold is 30mm, the graphite layer is 100mm, the heat-resistant layer is 100mm, the insulating layer is 200mm, and the water-cooled wall layer is 70mm; and the quartz layer in the inner core mold is 50mm, the graphite layer is 30mm, the heat-resistant layer is 50mm, and the water-cooling tube diameter is 60mm.

[0035] Embodiment 3:

[0036] The pallet system 2 is composed of a lifting drive assembly, a rotating drive assembly and a pallet, and a smelting furnace 1 is installed on the top of the pallet; wherein, the pallet diameter is 630 mm, the pallet rotation speed is 1-10 rpm, and the pallet lifting stroke is 2000 mm.

[0037] The lifting drive assembly is composed of a frequency conversion motor, a reduction gear box, a screw lifting slide and an encoder positioning, and the rotating drive assembly is composed of a frequency conversion motor and a reduction gear box; the feeding system 4 is composed of a servo drive assembly, a sensor and a signal device; among them, the feeding amount of the feeding system 4 is: 60kg / h, the feeding method is: water-cooled feeding valve feeding, the feeding adjustment method is: frequency conversion adjustment, and two sets are configured.

[0038] Embodiment 4:

[0039] The compressed air system 5 consists of an air compressor, a dry cooler and a nitrogen generator; the air compressor is a screw air compressor, 10Nm3 / min, 0.8MPa, and the compressor power is 75kW; the dry cooler is 30Nm3 / min, and the refrigerator power is 7hp; the nitrogen generator is a pressure swing adsorption type, 500Nm3 / h, 0.8MPa, and the purity is >99%; it is equipped with a four-stage compressed air filter and automatic drainage and sewage discharge; and the compressed air and compressed nitrogen are each equipped with a gas storage tank.

[0040] Embodiment 5:

[0041] The outside of the smelting furnace 1 is also provided with a flue gas system and a cooling water system. The flue gas system is composed of a dilution cooling fan, a bag dust collector, and an induced draft fan, and the cooling water system is composed of a cooling water pump and a chiller; wherein the parameters of the dilution cooling fan are 8000m3 / h, 500Pa, 11kW; the parameters of the bag dust collector are 10000m3 / h, <3kPa, with a soot blowing and ash removal device, compressed air soot blowing; the parameters of the induced draft fan are 10000m3 / h, 5kPa, 37kW; at the same time, the flue gas system is equipped with relevant pipeline valves, sensors, and signal devices;

[0042] The cooling water pump is a horizontal centrifugal pump with a flow rate of 50m3 / h, a head of 125m, and a motor power of 37kW; the parameters of the chiller are a flow rate of 50m3 / h, an inlet and outlet water temperature of 20 / 15℃, a cooling capacity of 300kWth, a refrigerator power of 110kW, and a fan power of 1.5kW×2; medium: primary demineralized water or deionized water; and is equipped with relevant sensors and signal devices.

[0043] Embodiment 6:

[0044] Preferably, the power control system 6 is composed of a power system and a control system, the power system is composed of an incoming power supply, a low-voltage distribution cabinet, a low-voltage power control cabinet and a transformer cabinet, and the control system is composed of a PLC control cabinet and a central control computer; wherein, the incoming power supply is 500kVA, three-phase five-wire, AC380V, 50Hz; the low-voltage distribution cabinet is 3-sided, with 1 group of incoming lines, 4 groups of outgoing frame circuit breakers, 9 groups of molded case circuit breakers, and 20 groups of miniature circuit breakers; low-voltage power control cabinet: 6 sides; transformer cabinet: 2 sides, SCB11-630 / 380, 380V / 500V / 500, Yy0d11, AN / AF, half-through 6%; DC power control cabinet: 4 sides, 450A / 600VDC.

[0045] The plasma fused quartz cylindrical billet forming system has flexible and adjustable overall operating power and operating temperature. The temperature can be adjusted at any time according to the actual process conditions in order to find the optimal working conditions. At the same time, a centralized distributed control system is adopted, and the entire system is computer-controlled by the central control and maximizes automatic control.

[0046] The working principle and use process of the utility model are as follows: when the device is required to work, the raw materials are automatically transported to the smelting furnace 1 by the feeding system 4, and then heated and formed by the plasma device 3, and assisted by the attached flue gas system and cooling system to ensure the quartz melting and subsequent blank forming effect.

[0047] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0048] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A plasma fused quartz cylindrical blank forming system, characterized in that: It comprises a smelting furnace (1), wherein a tray system (2) is arranged on the bottom side of the smelting furnace (1), and a plasma device (3) is installed on the top side of the smelting furnace (1); The main body of the plasma device (3) is a DC non-transferred plasma torch, and the plasma device (3) is equipped with four sets of plasma torches; A feeding system (4) is arranged on the left side of the smelting furnace (1), and a compressed air system (5) and a power supply control system (6) are also arranged on the outside of the smelting furnace (1).

2. A plasma fused quartz cylindrical blank forming system according to claim 1, characterized in that: The smelting furnace (1) is composed of an outer refractory mold and an inner core mold, and both the outer refractory mold and the inner core mold are composed of a quartz layer, a graphite layer, a heat-resistant layer, a heat-insulating layer and a water-cooled wall layer.

3. A plasma fused quartz cylindrical blank forming system according to claim 1, characterized in that: The pallet system (2) is composed of a lifting drive component, a rotating drive component and a pallet, and a smelting furnace (1) is installed on the top of the pallet.

4. A plasma fused quartz cylindrical blank forming system according to claim 3, characterized in that: The lifting drive assembly is composed of a variable frequency motor, a reduction box, a screw lifting slide and an encoder positioning, and the rotation drive assembly is composed of a variable frequency motor and a reduction box.

5. The plasma fused quartz cylindrical blank forming system according to claim 1, characterized in that: The feeding system (4) is composed of a servo drive component, a sensor and a signal device.

6. The plasma fused quartz cylindrical blank forming system according to claim 1, characterized in that: The compressed air system (5) is composed of an air compressor, a dry cooler and a nitrogen generator.

7. The plasma fused silica cylindrical blank forming system according to claim 1, characterized in that: A flue gas system and a cooling water system are also provided outside the smelting furnace (1), wherein the flue gas system is composed of a dilution cooling fan, a bag filter, and an induced draft fan, and the cooling water system is composed of a cooling water pump and a chiller.

8. The plasma fused silica cylindrical blank forming system according to claim 1, characterized in that: The power control system (6) is composed of a power system and a control system. The power system is composed of an incoming power supply, a low-voltage distribution cabinet, a low-voltage power control cabinet and a transformer cabinet. The control system is composed of a PLC control cabinet and a central control computer.

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