A vertical quartz rod feeding and melting device

Abstract

This invention relates to a vertical quartz rod feeding and melting device. It includes a rod feeding mechanism, a hydraulic control system, a rod placement plate, a rod clamping mechanism, a rod guide plate, and a melting rod burner. The rod feeding mechanism includes a telescopic cylinder with an annular sliding cavity and an annular piston. The rod placement plate and the telescopic cylinder are guided and fitted by guide holes and guide rods. The rod placement plate has multiple rod placement holes evenly distributed in inner and outer rings. The rod clamping mechanism includes an outer fixing ring and an inner fixing ring. The outer fixing ring is fitted outside the rod placement holes of the outer ring, and the inner fixing ring is fitted inside the rod placement holes of the inner ring. Multiple movable clamps are provided between the inner and outer fixing rings, and these movable clamps are spliced ​​into an annular structure. Each movable clamp includes an outer arc-shaped plate, an inner arc-shaped plate, and multiple compression springs connected between the inner and outer arc-shaped plates. The melting rod burner includes a combustion tube with an annular tubular structure. Flame nozzles are radially arranged on the inner and outer annular surfaces of the combustion tube, corresponding one-to-one with each quartz rod.

Description

Technical Field

[0001] This invention relates to a vertical feeding and melting device for quartz rods. Background Technology

[0002] Quartz fiber is a fiber made from high-purity silicon dioxide and natural quartz crystals. It possesses heat resistance, corrosion resistance, and flexibility. It exhibits high strength retention at high temperatures, dimensional stability, thermal shock resistance, chemical stability, light transmittance, and good electrical insulation. Quartz fiber production requires the use of quartz rods, with melting, unloading, and spinning occurring simultaneously. Since quartz fibers typically have diameters ranging from a few micrometers to tens of micrometers, spinning must be continuous and stable; otherwise, even slight errors can lead to fiber breakage. Therefore, high standards are placed on the continuity and stability of the unloading process.

[0003] Existing quartz rod feeding mechanisms generally use motor-driven ball screw mechanisms. High-precision ball screw mechanisms are typically imported, resulting in high costs and extremely high installation accuracy requirements. Ordinary precision ball screw mechanisms are less accurate, requiring longer ball screws for longer quartz rods. The longer the ball screw, the worse its straightness, causing the quartz rod to deviate from the set temperature range of the flame nozzle, affecting melting quality and ultimately product quality. Furthermore, ball screw mechanisms are not impact-resistant and are easily damaged by reverse forces, generating considerable noise during operation and causing inconvenience. Additionally, ball screw mechanisms have limited load-bearing capacity; traditional ball screw mechanisms reach their limit driving 100 quartz rods. To improve production efficiency, 200 to 400 quartz rods need to be processed at a time. To reduce the burden of loading, longer, larger diameter quartz rods are desired as raw materials, but existing ball screw mechanisms cannot meet this demand. Moreover, the current layout of the loading tray and burner cannot accommodate the processing of larger quantities of quartz rods. Summary of the Invention

[0004] Therefore, in order to solve the above problems, the present invention provides a vertical quartz rod feeding and melting device.

[0005] The technical solution of the present invention is as follows: A vertical quartz rod feeding and melting device includes:

[0006] The bar feeding mechanism includes a telescopic cylinder, which includes an annular sliding cavity. The top and bottom of the sliding cavity are respectively provided with oil holes that connect the inside and outside. An annular piston is slidably assembled inside the sliding cavity. Multiple piston rods are connected to the bottom surface of the annular piston. Each piston rod passes through the bottom of the sliding cavity and slides and seals with the bottom of the sliding cavity. A guide hole with a lower opening is provided at the axis of the telescopic cylinder.

[0007] The hydraulic control system has two hydraulic oil pipes that can alternately output oil. The two hydraulic oil pipes are respectively connected to two oil holes to drive the up and down movement of the annular piston.

[0008] A rod placement plate is coaxially arranged with the telescopic cylinder and connected to the lower part of the piston rod. An upwardly extending guide rod is provided at the upper axis of the plate. The guide rod slides and guides the guide hole. Multiple rod placement holes are evenly distributed in two concentric circles on the rod placement plate. The axis of the rod placement holes is parallel to the axis of the telescopic cylinder.

[0009] The clamping mechanism includes an outer fixing ring and an inner fixing ring. The outer fixing ring is fitted outside the rod placement hole of the outer ring, and the inner fixing ring is fitted inside the rod placement hole of the inner ring. Multiple movable clamps are provided between the inner and outer fixing rings. The multiple movable clamps are spliced ​​into a ring-shaped structure to press the quartz rod placed in the rod placement holes of the inner and outer rings onto the corresponding inner and outer fixing rings. The movable clamps include an outer arc plate, an inner arc plate, and multiple compression springs connected between the inner and outer arc plates.

[0010] The rod guide plate is located below the lower limit position of the rod placement plate during movement and is coaxially arranged with the rod placement plate. The rod guide plate has rod guide holes that are coaxially corresponding to the rod placement holes.

[0011] The molten rod burner includes a combustion tube with a circular tubular structure. The combustion tube is coaxially fixed to the lower part of the rod guide plate. Flame nozzles are arranged radially on the inner and outer ring surfaces of the combustion tube, corresponding to each quartz rod. The heating area of ​​each flame nozzle covers the passage path of the corresponding quartz rod to heat and melt the corresponding quartz rod.

[0012] The beneficial effects of this solution are as follows: During use, under the control of the hydraulic control system, when the rod is lowered, oil enters from the top of the annular piston and exits from the bottom. The annular piston moves downward, driving the rod placement plate and the corresponding quartz rod downward synchronously. The quartz rod is guided by the lower rod guide plate, allowing it to enter the heating temperature zone of the flame sprayed by the corresponding flame nozzle with higher precision, thereby melting the quartz rod to a suitable state. After the rod is delivered, under the control of the hydraulic control system, oil enters from the bottom of the annular piston and exits from the top, causing the annular piston to move upward, driving the rod placement plate upward. When loading the rod, the movable clamp is opened, the quartz rod is loaded and clamped, completing the rod clamping operation. Compared with the existing technology, it has the following advantages:

[0013] 1. By utilizing the special structure of the rod feeding mechanism and replacing the screw and nut mechanism with hydraulic power, the large contact area between the annular piston and the inner wall of the sliding cavity, as well as the guidance of the guide rod and the guide hole, ensures good straightness during the downward movement of the rod placement tray. It can run smoothly in a straight line without deviation, which would affect the position of the quartz rod in the flame. When the quartz rod is melting, it is necessary to strictly control its position in the flame, as different positions in the flame have different temperatures and achieve different melting effects. This application addresses this issue by using a rod feeding mechanism structure that allows the quartz rod to descend smoothly without deviation or shaking. Furthermore, the rod guide plate set below can precisely guide the bottom of the quartz rod, preventing it from shaking due to the cantilever structure. In other words, this application not only controls the linear motion accuracy of the rod placement tray during its descent but also controls the shaking of the quartz rod itself, ultimately ensuring that the quartz rod can accurately pass through the appropriate area in the flame, thus guaranteeing the quality of quartz fiber drawing.

[0014] 2. Based on the above-mentioned rod feeding mechanism, the rod placement tray can hold more quartz rods at once. This is because the rod feeding mechanism of this application is more impact-resistant and can withstand greater loads than the traditional screw and nut mechanism, and can bear the weight of more quartz rods. It can also withstand the larger momentum generated when the heavier quartz rods stop at the lower limit position. On the other hand, this application uses a circular piston and multiple piston rods, which have a larger cross-sectional area. This allows for multi-point support to the rod placement tray over a larger area. The rod placement tray is less likely to sway along a certain axis in the horizontal plane, so the rod placement tray can be made larger, with more area to place more quartz rods, thereby improving the efficiency of quartz rod melting.

[0015] 3. Corresponding to the fact that the rod placement tray can hold more quartz rods, the molten rod burner adopts a ring-shaped structure, with a ring of flame nozzles on the inner and outer circumferences respectively, which correspond one-to-one with the rod placement holes on the rod placement tray, and also provide support for melting more quartz rods;

[0016] Therefore, it is evident that the structures of the bar feeding mechanism, the bar placement tray, the bar clamping mechanism, and the molten bar burner are used in conjunction with each other. This structural coordination results in smoother bar feeding, more precise positioning of the quartz bars during movement, accurate placement into the designated area within the flame for heating to improve melt quality, the ability to clamp more quartz bars, smooth movement of more quartz bars, and the ability to melt more quartz bars at once. In summary, the advantages of this solution are: precise quartz bar feeding to improve product quality and reduce scrap rate; the ability to melt more quartz bars at once to increase production efficiency; and a bar feeding mechanism that is more stable, has a stronger load-bearing capacity, is more impact-resistant, and less prone to damage than traditional screw and nut mechanisms.

[0017] Based on the above scheme, the following further improvement is made: the cross-section of the combustion tube's inner cavity is rectangular. This structure facilitates the processing of a large number of flame nozzles and also facilitates the connection and positioning with the rod guide plate.

[0018] Based on the above scheme, further improvements are made as follows: At least three gas mixture inlets are evenly distributed at the bottom of the combustion tube, with gas mixture being introduced into each inlet simultaneously. Since the fused rod burner corresponding to this scheme can melt more quartz rods and has a relatively large diameter, the even distribution of multiple gas mixture inlets allows for a more uniform distribution of the gas mixture within the combustion tube, thereby ensuring the uniformity of gas ejection from each flame nozzle. The combustion tube is filled with a honeycomb structure made of high-temperature resistant material to further enhance the uniform distribution of the gas mixture within the combustion tube.

[0019] Based on the above solution, further improvements are made as follows: at least one elastic rubber strip extending along the length direction is embedded on the inner arc surface of the inner arc plate and / or the outer arc surface of the outer arc plate. After setting the elastic rubber strip on the side of the inner and outer arc plates that contacts the quartz rod, it can, on the one hand, clamp the quartz rod more tightly, and the clamped quartz rod is less likely to slip; on the other hand, it can prevent mutual wear between the hard quartz rod and the hard clamping mechanism.

[0020] Based on the above solution, further improvements are made as follows: at least one elastic rubber ring is embedded on the outer circumferential surface of the inner fixing ring and / or the inner circumferential surface of the outer fixing ring. On the one hand, this allows for a tighter clamping of the quartz rod, and the clamped quartz rod is less prone to slippage; on the other hand, it prevents mutual wear between the hard quartz rod and the hard clamping mechanism.

[0021] Based on the above scheme, further improvements are made as follows: the clamping mechanism includes steel rings, which are sequentially inserted into the compression springs of each movable clamp, with the compression springs arranged radially along the steel rings. The steel rings position each movable clamp, preventing them from jumping or shifting and affecting the accurate clamping of the quartz rod, and also ensuring that the movable clamps form a complete circular ring.

[0022] Based on the above solution, the following improvement is made: the clamping mechanism is installed on the upper part of the rod placement plate. This makes it easier to fix the clamping mechanism relative to the rod placement plate.

[0023] Based on the above scheme, the following improvements are made: the bottom of the sliding cavity is provided with perforations corresponding to each piston rod, and a step seal is installed at the perforation, with the piston rod inserted into the step seal.

[0024] Based on the above scheme, further improvements are made as follows: The annular piston includes a large-diameter section in the middle and small-diameter sections symmetrically arranged on both sides of the large-diameter section. Sealing rings of corresponding sizes are respectively provided on the inner and outer circumferential surfaces of the large-diameter section. Annular mounting grooves are provided on both the inner and outer circumferential surfaces of the large-diameter section for installing the sealing rings. The edge of the annular mounting groove slides in a guide-sliding fit with the inner wall surface of the sliding cavity. The small-diameter section design allows the hydraulic oil to drive the annular piston to move even when the annular piston is in contact with the top and bottom of the sliding cavity, thus preventing the annular piston from jamming. The sealing rings prevent hydraulic oil from flowing between the two sides of the annular piston. The annular mounting groove allows the sealing ring to be embedded within it, preventing misalignment during sliding. The design of the groove edge sliding in a guide-sliding fit with the inner wall surface of the sliding cavity further improves the guiding performance between the annular piston and the inner wall of the sliding cavity, thus improving guiding accuracy.

[0025] Based on the above scheme, the following improvements are made: the rod placement disk is made of carbon fiber composite material or titanium alloy; multiple evenly distributed weight reduction holes are set on the rod placement disk. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of an embodiment of a vertical quartz rod feeding and melting device of the present invention (the annular piston moves upward to the upper limit position).

[0027] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0028] Figure 3 for Figure 1 A magnified view of a section at point B in the middle;

[0029] Figure 4 for Figure 1 A magnified view of a section at point C;

[0030] Figure 5 This is a three-dimensional structural diagram (three-dimensional sectional view) of a ring piston.

[0031] Figure 6 A top view of the rod placement plate and the rod clamping mechanism;

[0032] Figure 7 for Figure 6 A magnified view of a section at point D;

[0033] Figure 8 This is a three-dimensional view of the inner arc-shaped plate;

[0034] Figure 9 This is a bottom view of the fused rod burner;

[0035] Figure 10This is a schematic diagram of the system principle when the annular piston descends to the lower limit position (the rod guide plate and the molten rod burner are omitted).

[0036] In the diagram: 1-Hydraulic control system, 11-Hydraulic oil tank, 12-Oil pump, 13-Motor, 14-Two-position four-way solenoid directional valve, 15-Hydraulic oil pipe, 16-Controller, 17-Relief valve, 2-Telescopic cylinder, 21-Sliding chamber, 22-Oil hole, 23-Annular piston, 231-Large diameter section, 232-Small diameter section, 233-Sealing ring, 234-Annular mounting groove, 235-Groove edge, 24-Piston rod, 25-Step seal, 26-Guide hole. 3-Rod placement plate, 31-Guide rod, 32-Rod placement hole, 33-Weight reduction hole, 4-Rod clamping mechanism, 41-Outer fixing ring, 411-Elastic rubber ring, 42-Inner fixing ring, 43-Modible clamp, 431-Outer arc plate, 432-Inner arc plate, 433-Compression spring, 434-Elastic rubber strip, 44-Steel ring, 5-Rod guide plate, 6-Fused rod burner, 61-Combustion tube body, 62-Flame nozzle, 63-Mixed gas inlet, 7-Quartz rod. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0039] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0041] A specific embodiment of the quartz rod vertical feeding and melting device of the present invention is as follows: Figure 1 As shown, the vertical quartz rod feeding and melting device includes a rod feeding mechanism, a hydraulic control system 1, a rod placement plate 3, a rod clamping mechanism 4, a rod guide plate 5, and a melting rod burner 6.

[0042] like Figure 1-4As shown, the rod feeding mechanism includes a telescopic cylinder 2, which includes an annular sliding cavity 21. The top and bottom of the sliding cavity 21 are respectively provided with oil holes communicating with the inside and outside. An annular piston 23 is slidably mounted inside the sliding cavity 21. Multiple piston rods 24 are connected to the bottom surface of the annular piston 23, and each piston rod 24 extends out from the bottom of the sliding cavity 21. The piston rods 24 are slidably and sealingly fitted with the bottom of the sliding cavity 21. A guide hole 26 with a lower opening is provided at the axis of the telescopic cylinder 2. A through hole is provided at the bottom of the sliding cavity 21 corresponding to each piston rod 24, and a step seal 25 is installed at the through hole, through which the piston rod 24 passes. The annular piston 23 includes a large-diameter section 231 located in the middle and small-diameter sections 232 symmetrically arranged on both sides of the large-diameter section 231. Sealing rings of corresponding sizes are respectively provided on the inner and outer circumferential surfaces of the large-diameter section 231. Annular mounting grooves 234 are provided on both the inner and outer circumferential surfaces of the large-diameter section 231 for installing the sealing rings. The groove edge 235 of the annular mounting groove 234 guides and slides in contact with the inner wall of the sliding cavity 21. The small-diameter sections 232 ensure that even if the annular piston 23 is in contact with the top and bottom of the sliding cavity 21, hydraulic oil can still drive the annular piston 23 to move, thus preventing the annular piston 23 from jamming. The sealing rings prevent hydraulic oil from flowing between the two sides of the annular piston 23. The annular mounting groove 234 allows the sealing ring to be embedded within it, preventing misalignment during sliding. The design of the groove edge 235 of the annular mounting groove 234 and the inner wall of the sliding cavity 21 for guiding sliding further improves the guiding performance between the annular piston 23 and the inner wall of the sliding cavity 21, thus improving the guiding accuracy.

[0043] like Figure 1 As shown, the hydraulic control system 1 has two hydraulic oil pipes 15 that can alternately supply oil. The two hydraulic oil pipes 15 are respectively connected to two oil holes to drive the up and down movement of the annular piston 23. Specifically, the hydraulic oil tank 11 is used to store hydraulic oil; the oil pump 12 is used to draw in and pump out hydraulic oil, and a hydraulic pump or plunger pump can be selected. The motor 13 drives the oil pump 12 to run, such as a geared motor 13. The two-position four-way solenoid directional valve 1414 has a valve body and a directional valve core. The valve body has two internal oil ports and two external oil ports. The two internal oil ports are connected to the outlet of the oil pump 12 and the hydraulic oil tank 11, respectively. The two external oil ports are connected to the hydraulic oil pipes 15, respectively. The directional valve core has a first valve position that connects the oil pump 12 to the first external oil port and the second external oil port to the hydraulic oil tank 11, and a second valve position that connects the oil pump 12 to the second external oil port and the first external oil port to the oil tank. The controller 16 controls the start and stop of the motor 13 and the valve position switching of the directional valve core, respectively. The relief valve 17 is located between the outlet of the oil pump 12 and the oil tank, and has a safety protection function to ensure that the system pressure is not too high.

[0044] like Figure 1 , 6As shown, the rod placement disk 3 is coaxially arranged with the telescopic cylinder 2 and connected to the lower part of the piston rod 24. An upwardly extending guide rod 31 is provided at its upper axis, and the guide rod 31 slides in a guide hole 26. Multiple rod placement holes 32 are concentrically arranged in inner and outer rings on the rod placement disk 3, and the axis of the rod placement holes 32 is parallel to the axis of the telescopic cylinder 2. The rod placement disk 3 is made of carbon fiber composite material or titanium alloy; multiple evenly distributed weight-reducing holes 33 are provided on the rod placement disk 3.

[0045] like Figure 1 , 2 As shown in Figures 6, 7, and 8, the clamping mechanism 4 includes an outer fixing ring 41 and an inner fixing ring 42. The outer fixing ring 41 is fitted outside the rod placement hole 32 of the outer ring, and the inner fixing ring 42 is fitted inside the rod placement hole 32 of the inner ring. Multiple movable clamps 43 are provided between the inner and outer fixing rings 41, and these movable clamps 43 are assembled into a circular structure to press the quartz rods placed in the rod placement holes 32 of the inner and outer rings onto the corresponding inner and outer fixing rings 41. The movable clamp 43 includes an outer arc-shaped plate 431, an inner arc-shaped plate 432, and multiple compression springs 433 connected between the inner and outer arc-shaped plates 431. At least one elastic rubber strip 434 extending along the length direction is embedded on the inner arc-shaped surface of the inner arc-shaped plate 432 and / or the outer arc-shaped surface of the outer arc-shaped plate 431. After the inner and outer arc plates are provided with elastic rubber strips 434 on the side that contacts the quartz rod, it can clamp the quartz rod more tightly and prevent the quartz rod from slipping after clamping. It can also prevent mutual wear between the hard quartz rod and the hard clamping mechanism 4. At least one elastic rubber ring 411 is embedded on the outer circumferential surface of the inner fixing ring 42 and / or the inner circumferential surface of the outer fixing ring 41. It can clamp the quartz rod more tightly and prevent the quartz rod from slipping after clamping. It can also prevent mutual wear between the hard quartz rod and the hard clamping mechanism 4. The clamping mechanism 4 includes a steel ring 44, which is sequentially inserted into the compression springs 433 of each movable clamp 43. The compression springs 433 are arranged radially along the steel ring 44. The steel ring 44 can position each movable clamp 43, preventing the movable clamp 43 from jumping or displacing and affecting the accurate clamping of the quartz rod. It can also ensure that each movable clamp 43 is assembled into a complete ring. The rod clamping mechanism 4 is mounted on the upper part of the rod placement plate 3. This makes it easier to fix the rod clamping mechanism 4 relative to the rod placement plate 3.

[0046] like Figure 1 As shown, the rod guide disk 5 is located below the lower limit position of the rod placement disk 3 during movement, and is coaxially arranged with the rod placement disk 3. The rod guide disk 5 is provided with rod guide holes 26 coaxially corresponding to the rod placement holes 32.

[0047] like Figure 1 , 9As shown, the molten rod burner 6 includes a circular tubular combustion tube 61, which is coaxially fixed to the lower part of the rod guide plate 5. Flame nozzles 62 are radially arranged on the inner and outer annular surfaces of the combustion tube 61, corresponding to each quartz rod. The heating area of ​​each flame nozzle 62 covers the path of the corresponding quartz rod to heat and melt it. The cross-section of the inner cavity of the combustion tube 61 is rectangular. This structure facilitates the processing of numerous flame nozzles 62 and also facilitates connection and positioning with the rod guide plate 5. At least three mixed gas inlets 63 are evenly distributed at the lower part of the combustion tube 61, and mixed gas is simultaneously introduced into each inlet 63. Since the molten rod burner 6 of this design can melt more quartz rods and has a relatively large diameter, the even distribution of multiple mixed gas inlets 63 makes the mixed gas distribution within the combustion tube 61 more uniform, thereby ensuring the uniformity of the jetting from each flame nozzle 62. The combustion tube 61 is filled with a honeycomb structure made of high-temperature resistant material to make the mixture more evenly distributed inside the combustion tube 61.

[0048] During use, under the control of the hydraulic control system 1, when the rod is lowered, oil enters from the top of the annular piston 23 and exits from the bottom. The annular piston 23 moves downward, driving the rod placement plate 3 and the corresponding quartz rod to move downward synchronously. The quartz rod is guided by the rod guide plate 5 at the bottom, so that it can enter the heating temperature zone of the flame sprayed by the corresponding flame nozzle 62 at the bottom with higher precision, thereby melting the quartz rod to a suitable state. After the rod is delivered, under the control of the hydraulic control system 1, oil enters from the bottom of the annular piston 23 and exits from the top. The annular piston 23 moves upward, driving the rod placement plate 3 to move upward. When loading the rod, the movable clamp 43 is opened, the quartz rod is loaded and clamped, and the rod clamping operation is completed. Compared to existing technologies, this application utilizes a special structure in the rod feeding mechanism, replacing the lead screw and nut mechanism with hydraulic power. Due to the large contact area between the annular piston 23 and the inner wall of the sliding cavity 21, as well as the guidance of the guide rod 31 and the guide hole 26, the downward movement of the rod placement plate 3 can be guaranteed to have good straightness. It can run smoothly in a straight line without deviation, which would affect the position of the quartz rod in the flame. When the quartz rod is melting, it is necessary to strictly control the position of the quartz rod in the flame, as different positions in the flame have different temperatures and achieve different melting effects. In this application, on the one hand, the structure of the rod feeding mechanism allows the quartz rod to descend smoothly without deviation or shaking. On the other hand, the rod guide plate 5 set below can accurately guide the bottom of the quartz rod, preventing the quartz rod from shaking due to the cantilever structure. That is, this application not only controls the linear motion accuracy of the rod placement plate 3 during its descent but also controls the shaking of the quartz rod itself, ultimately ensuring that the quartz rod can accurately pass through the appropriate area in the flame, ensuring the quality of quartz fiber drawing. Based on the aforementioned rod feeding mechanism, the rod placement tray 3 can hold more quartz rods at once. This is because the rod feeding mechanism of this application is more impact-resistant and can withstand greater loads than the traditional screw and nut mechanism, enabling it to bear the weight of more quartz rods and the larger momentum generated when the heavier quartz rods stop at their lower limit position. Furthermore, this application uses a circular piston 23 and multiple piston rods 24, which have a larger cross-sectional area, providing multi-point support to the rod placement tray 3 over a larger area. The rod placement tray 3 is less prone to swaying along a single axis in the horizontal plane, allowing it to be made larger, providing more area to accommodate more quartz rods and thus improving the efficiency of quartz rod melting. Corresponding to the rod placement tray 3's ability to hold more quartz rods, the melting rod burner 6 adopts a circular structure, with a ring of flame nozzles on the inner and outer circumferences corresponding to the rod placement holes 32 on the rod placement tray 3, providing support for melting more quartz rods.

[0049] The structures of the bar feeding mechanism, the bar placement tray 3, the bar clamping mechanism 4, and the molten bar burner 6 are used in conjunction with each other. This structural coordination ensures smoother bar feeding, more precise positioning of the quartz bars during movement, accurate placement within the designated area of ​​the flame for heating to improve melt quality, the ability to clamp more quartz bars, smooth movement of more quartz bars, and the ability to melt more quartz bars at once. Precise bar feeding improves product quality and reduces scrap rates, while the ability to melt more quartz bars at once increases production efficiency. The bar feeding mechanism is more stable, has a higher load-bearing capacity, is more impact-resistant, and less prone to damage than traditional screw and nut mechanisms.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A vertical quartz rod feeding and melting device, characterized in that, include: The bar feeding mechanism includes a telescopic cylinder, which includes an annular sliding cavity. The top and bottom of the sliding cavity are respectively provided with oil holes that connect the inside and outside. An annular piston is slidably assembled inside the sliding cavity. Multiple piston rods are connected to the bottom surface of the annular piston. Each piston rod passes through the bottom of the sliding cavity and slides and seals with the bottom of the sliding cavity. A guide hole with a lower opening is provided at the axis of the telescopic cylinder. The hydraulic control system has two hydraulic oil pipes that can alternately output oil. The two hydraulic oil pipes are respectively connected to two oil holes to drive the up and down movement of the annular piston. A rod placement plate is coaxially arranged with the telescopic cylinder and connected to the lower part of the piston rod. An upwardly extending guide rod is provided at the upper axis of the plate. The guide rod slides and guides the guide hole. Multiple rod placement holes are evenly distributed in two concentric circles on the rod placement plate. The axis of the rod placement holes is parallel to the axis of the telescopic cylinder. The clamping mechanism includes an outer fixing ring and an inner fixing ring. The outer fixing ring is fitted outside the rod placement hole of the outer ring, and the inner fixing ring is fitted inside the rod placement hole of the inner ring. Multiple movable clamps are provided between the inner and outer fixing rings. The multiple movable clamps are spliced ​​into a ring-shaped structure to press the quartz rod placed in the rod placement holes of the inner and outer rings onto the corresponding inner and outer fixing rings. The movable clamps include an outer arc plate, an inner arc plate, and multiple compression springs connected between the inner and outer arc plates. The rod guide plate is located below the lower limit position of the rod placement plate during movement and is coaxially arranged with the rod placement plate. The rod guide plate has rod guide holes that are coaxially corresponding to the rod placement holes. The molten rod burner includes a combustion tube with a circular tubular structure. The combustion tube is coaxially fixed to the lower part of the rod guide plate. Flame nozzles are arranged radially on the inner and outer ring surfaces of the combustion tube, corresponding to each quartz rod. The heating area of ​​each flame nozzle covers the passage path of the corresponding quartz rod to heat and melt the corresponding quartz rod.

2. The quartz rod vertical feeding and melting device according to claim 1, characterized in that, The cross-section of the combustion tube's internal cavity is rectangular.

3. The quartz rod vertical feeding and melting device according to claim 2, characterized in that, The lower part of the combustion tube has at least three gas mixture inlets, each of which simultaneously introduces gas mixture. The combustion tube is filled with a honeycomb structure made of high-temperature resistant material.

4. The quartz rod vertical feeding and melting device according to claim 1, characterized in that, At least one elastic rubber strip extending along the length direction is embedded on the inner arc surface of the inner arc plate and / or the outer arc surface of the outer arc plate.

5. A vertical quartz rod feeding and melting device according to claim 4, characterized in that, At least one elastic rubber ring is embedded on the outer circumferential surface of the inner fixing ring and / or the inner circumferential surface of the outer fixing ring.

6. The quartz rod vertical feeding and melting device according to claim 1, characterized in that, The clamping mechanism includes steel rings, which are sequentially inserted into the compression springs of each movable clamp. The compression springs are arranged radially along the steel rings.

7. A vertical quartz rod feeding and melting device according to claim 1, characterized in that, The bar clamping mechanism is installed on the upper part of the bar placement plate.

8. A vertical quartz rod feeding and melting device according to claim 1, characterized in that, The bottom of the sliding cavity has perforations corresponding to each piston rod, and a step seal is installed at the perforation, through which the piston rod passes.

9. A vertical quartz rod feeding and melting device according to claim 1, characterized in that, The annular piston includes a large-diameter section in the middle and small-diameter sections symmetrically arranged on both sides of the large-diameter section. Sealing rings of corresponding sizes are respectively provided on the inner and outer circumferential surfaces of the large-diameter section. Annular mounting grooves are provided on both the inner and outer circumferential surfaces of the large-diameter section for installing the sealing rings. The edge of the annular mounting groove guides and slides in a sliding fit with the inner wall surface of the sliding cavity.

10. A vertical quartz rod feeding and melting device according to claim 1, characterized in that, The rod placement tray is made of carbon fiber composite material or titanium alloy; multiple evenly distributed weight reduction holes are provided on the rod placement tray.

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