Electronic quartz glass rod melting furnace

Abstract

The utility model discloses a quartz glass rod smelting furnace for electronic cloth, including furnace body and the heat preservation layer and hearth of inside furnace body position, the upper portion of hearth is equipped with hydrogen oxygen combustor, and the lower portion of hearth is equipped with the forming channel, and hearth radial is equipped with a plurality of flue gas channels, and all flue gas channels are connected to the annular flue of heat preservation layer position and are connected with the first fan, and the upper end of forming channel is connected with the annular plate of hearth inner wall connection, and the forming channel and annular plate and hearth form the heat preservation cavity, and the both sides of heat preservation cavity are equipped with the heat preservation air inlet channel and the heat preservation air outlet channel of second fan connection respectively and are connected to the annular flue, the utility model discloses can control the flow rate of high temperature flue gas, and high temperature flue gas can enter the heat preservation cavity from the annular flue via the heat preservation air inlet channel, reduces the adverse effect of impurity to quartz glass solution and carries out the heat preservation to quartz glass solution, promotes the smooth forming of quartz glass rod, guarantees the forming quality and forming purity of quartz glass rod.

Description

Technical Field

[0001] This utility model relates to the field of electronic cloth raw material technology, and in particular to a quartz glass rod melting furnace for electronic cloth. Background Technology

[0002] Electronic cloth is a precision base material made from ultra-fine electronic-grade quartz glass fiber through special weaving and surface treatment processes. In the electronics industry chain, PCB is regarded as the neural network of electronic devices, undertaking the function of carrying and connecting all chips and components. CCL is the substrate for building PCB, providing insulation support and conductive channels. Electronic cloth can be regarded as the steel frame of CCL, giving it core mechanical strength, dimensional stability, heat resistance, and insulation performance. Key performance parameters of electronic cloth (such as thickness, fiber opening degree, warp and weft yarn uniformity, and surface treatment adaptability) directly affect the signal transmission integrity, heat dissipation efficiency, and reliability of PCB in high-frequency, high-speed, and high-power scenarios. The quartz glass fiber used in electronic cloth is an inorganic fiber material with silica as the main component and a purity of ≥99.9%. It is made through a fused silica rod drawing process. Therefore, the purity of the quartz glass rod is particularly important.

[0003] However, in actual production, the temperature required to melt quartz powder raw materials in existing quartz glass rod melting furnaces is above 1750℃. During continuous production, the temperature inside the furnace is high, and the high-temperature flue gas emission in existing melting furnaces is not very stable. Excessive or slow emission of high-temperature flue gas will cause instability in the furnace temperature, resulting in large temperature fluctuations inside the melting furnace. This leads to poor forming quality of quartz glass rods. Moreover, if the high-temperature flue gas is discharged too slowly, the impurities in it will escape, affecting the forming purity of the quartz glass rods, which is detrimental to the subsequent melting and drawing production of electronic cloth. Utility Model Content

[0004] To address the technical problem of unstable high-temperature flue gas emissions in the melting furnace in existing technologies, where excessively fast or slow emission of high-temperature flue gas can cause instability in the furnace temperature and the escape of impurities, thus affecting the forming quality and purity of quartz glass rods, this utility model provides the following technical solution.

[0005] This utility model discloses a quartz glass rod melting furnace for electronic fabrics, comprising a furnace body, an insulation layer and a furnace chamber located inside the furnace body. A hydrogen-oxygen burner is installed on the upper part of the furnace chamber, and a forming channel is provided in the lower part of the furnace chamber. Several flue gas channels are radially arranged in the furnace chamber, and all the flue gas channels are connected to an annular flue located on the insulation layer and connected to a first fan. An annular plate connected to the inner wall of the furnace chamber is connected to the upper end of the forming channel. The forming channel, the annular plate and the furnace chamber form an insulation cavity. Insulation inlet channels connected to the annular flue and insulation outlet channels connected to a second fan are respectively provided on both sides of the insulation cavity.

[0006] As a further technical solution, a plug with an insulating rod connected to it is provided above the heat-insulating air inlet. The insulating rod penetrates the furnace body so that the plug blocks the inlet of the heat-insulating air inlet.

[0007] As a further technical solution, a driving component is provided on the outside of the furnace body, and the output end of the driving component is connected to the heat insulation rod.

[0008] As a further technical solution, there are four flue gas channels, which are evenly distributed radially along the furnace.

[0009] As a further technical solution, the annular plate is inclined toward the inner wall of the furnace.

[0010] As a further technical solution, a thermocouple is provided inside the insulation cavity, and the thermocouple is electrically connected to the temperature control system of the melting furnace.

[0011] The beneficial effects of this invention are as follows: Multiple flue gas channels are evenly arranged radially within the furnace chamber and connected to an annular flue. A first fan controls the discharge rate of high-temperature flue gas, ensuring its even discharge from all sides of the furnace chamber. This allows for control of the flue gas flow rate, guaranteeing temperature stability within the furnace chamber and ensuring the molding quality of the quartz glass rod. Simultaneously, the molding channels, annular plate, and furnace chamber enclose an insulation cavity. To prevent impurities in the high-temperature flue gas from entering the molten quartz glass solution, the discharge rate of the high-temperature flue gas is increased. The insulation cavity is equipped with an insulation inlet and an insulation outlet. High-temperature flue gas can enter the insulation cavity from the annular flue via the insulation inlet, insulating the upper part of the molding channel. This reduces the adverse effects of impurities on the quartz glass solution while simultaneously maintaining the temperature of the quartz glass solution, promoting the smooth molding of the quartz glass rod and further ensuring its molding quality and purity. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural diagram of the quartz glass rod melting furnace for electronic cloth of this utility model; In the diagram: 1-furnace body; 2-insulation layer; 3-furnace chamber; 4-hydrogen-oxygen burner; 5-forming channel; 6-ring plate; 7-insulation cavity; 8-flue gas channel; 9-ring flue; 10-first fan; 11-insulation air inlet; 12-insulation air outlet; 13-second fan; 14-driving component; 15-insulation rod; 16-plug; 17-insulation thermocouple. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 merely illustrative of the present utility model and are not intended to limit the present utility model. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0014] In the description of this utility model, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0015] like Figure 1 As shown, this utility model discloses a quartz glass rod melting furnace for electronic fabrics, comprising a furnace body 1, an insulation layer 2 located inside the furnace body 1, and a furnace chamber 3. An oxyhydrogen burner 4 is installed on the upper part of the furnace chamber 3, and a forming channel 5 is provided at the lower part of the furnace chamber 3. The furnace body 1 is made of steel plate, the insulation layer 2 is constructed of refractory bricks, and the furnace chamber 3 is made of zirconium oxide, a type of refractory material. The oxyhydrogen burner 4 is a conventional structure used to introduce oxyhydrogen, oxygen, and quartz powder raw materials, and to melt the quartz powder raw materials with an oxyhydrogen flame. The observation window on one side of the furnace body 1, the thermocouples and other components inside the furnace chamber 3, and the temperature control system are all existing technologies and will not be described in detail. A slow-descent worktable is provided at the lower part of the forming channel 5. The slow-descent worktable is a conventional technology; its operation, in conjunction with the forming channel 5, allows the molten quartz solution to be formed and the formed quartz glass rod to be slowly lowered and pulled out.

[0016] In a preferred embodiment, the furnace 3 is radially provided with several flue gas channels 8, all of which are connected to an annular flue 9 located in the insulation layer 2. The annular flue 9 is connected to a first fan 10, which controls the discharge rate of high-temperature flue gas from the furnace 3. In this embodiment, there are four flue gas channels 8, evenly distributed radially along the furnace 3. Of course, the number of flue gas channels 8 can be more, as long as they are evenly distributed radially along the furnace 3 to evenly discharge high-temperature flue gas into the annular flue 9. The annular flue 9 is arranged around the furnace 3 within the insulation layer 2, which facilitates the insulation of the furnace 3 and reduces the adverse effects of external temperature on the temperature inside the furnace 3.

[0017] Meanwhile, the discharge volume of high-temperature flue gas is controlled by the first fan 10, which can make the flue gas evenly discharged from all sides of the furnace 3. The flow rate of the high-temperature flue gas can be controlled to ensure the stability of the temperature inside the furnace 3 and to ensure the forming quality of the quartz glass rod.

[0018] In a preferred embodiment, an annular plate 6 connected to the inner wall of the furnace 3 is attached to the upper end of the forming channel 5. The annular plate 6 is inclined towards the inner wall of the furnace 3 to allow excess undischarged impurities to accumulate. The annular plate 6 is also made of refractory zirconium oxide material. The forming channel 5, the annular plate 6, and the furnace 3 form a sealed heat-insulating cavity 7. The heat-insulating cavity 7 is used to increase the heat preservation effect when the molten quartz solution melts with the bottom ingot on the slow-falling worktable, ensuring the temperature required for the melting of the quartz solution and the bottom ingot, and reducing the influence of external temperature on the forming temperature. It is known that a heat-insulating thermocouple 17 is provided in the heat-insulating cavity 7, and the heat-insulating thermocouple 17 is electrically connected to the temperature control system of the melting furnace. At this time, the insulation cavity 7 is provided with an insulation inlet duct 11 connected to the annular flue 9 and an insulation outlet duct 12 connected to the second fan 13 on both sides. Under the action of the second fan 13, the high-temperature flue gas in the annular flue 9 enters the insulation cavity 7 from the insulation inlet duct 11 and is discharged from the insulation outlet duct 12, which can provide high temperature for the insulation cavity 7. At the same time, due to the high temperature and pressure in the furnace 3, when the second fan 13 is started, the high-temperature flue gas enters the insulation cavity 7 from the lower part of the annular flue 9, while the flue gas in the upper part of the annular flue 9 will not enter the insulation cavity 7.

[0019] To prevent impurities in the high-temperature flue gas from entering the molten quartz glass solution and affecting the purity of the quartz glass rod, the exhaust speed of the high-temperature flue gas can be increased. However, if only the first fan 10 rapidly extracts the high-temperature flue gas, the temperature inside the furnace 3 will decrease. Therefore, a second fan 13 is used to extract the high-temperature flue gas. At this time, the high-temperature flue gas can be used to keep the molten quartz solution and the bottom ingot at the upper end of the forming channel 5 warm through the insulation chamber 7. This reduces the adverse effects of impurities on the quartz glass solution and, at the same time, keeps the quartz glass solution warm, which can promote the smooth forming of the quartz glass rod and further ensure the forming quality and purity of the quartz glass rod.

[0020] In a preferred embodiment, a plug 16 connected to an insulating rod 15 is provided above the insulated air inlet duct 11. The insulating rod 15 penetrates the furnace body 1 and the insulation layer 2. The movement of the insulating rod 15 can cause the plug 16 to block the inlet of the insulated air inlet duct 11, thereby controlling whether the insulation cavity 7 is insulated. At the same time, a driving component 14 is provided on the outside of the furnace body 1. The driving component 14 can be a cylinder or a manual push rod. The output end of the driving component 14 is connected to the insulating rod 15, and the movement of the insulating rod 15 is controlled by the driving component 14, which facilitates the plug 16 to block or open the inlet of the insulated air inlet duct 11.

[0021] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A furnace for melting quartz glass rods for electronic fabrics, comprising a furnace body (1), an insulation layer (2) located inside the furnace body (1), and a furnace chamber (3), wherein an oxyhydrogen burner (4) is installed on the upper part of the furnace chamber (3), and a forming channel (5) is provided on the lower part of the furnace chamber (3), characterized in that: The furnace (3) is provided with a plurality of flue gas channels (8) in the radial direction. All of the flue gas channels (8) are connected to an annular flue (9) located on the insulation layer (2) and connected to a first fan (10). The upper end of the forming channel (5) is connected to an annular plate (6) connected to the inner wall of the furnace (3). The forming channel (5), the annular plate (6) and the furnace (3) form an insulation cavity (7). The insulation cavity (7) is provided with an insulation inlet channel (11) connected to the annular flue (9) and an insulation outlet channel (12) connected to a second fan (13) on both sides.

2. The quartz glass rod melting furnace for electronic fabrics according to claim 1, characterized in that: Above the insulated air inlet (11) is a plug (16) connected to an insulating rod (15). The insulating rod (15) penetrates the furnace body (1) so that the plug (16) blocks the inlet of the insulated air inlet (11).

3. The quartz glass rod melting furnace for electronic fabric according to claim 2, characterized in that: A drive unit (14) is provided on the outside of the furnace body (1), and the output end of the drive unit (14) is connected to the heat insulation rod (15).

4. The quartz glass rod melting furnace for electronic fabric according to claim 1, characterized in that: There are four flue gas passages (8), which are evenly distributed radially along the furnace (3).

5. The quartz glass rod melting furnace for electronic fabric according to claim 1, characterized in that: The annular plate (6) is inclined toward the inner wall of the furnace (3).

6. The quartz glass rod melting furnace for electronic fabric according to claim 1, characterized in that: The insulation cavity (7) is equipped with an insulation thermocouple (17), which is electrically connected to the temperature control system of the melting furnace.

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