Vacuum furnace for preparing low-hydroxyl quartz glass

Abstract

The utility model discloses a vacuum furnace for preparing low-hydroxyl quartz glass, which relates to the technical field of preparation of low-hydroxyl quartz glass and comprises a furnace body, an air outlet is arranged at the top of the furnace body, an operation screen is embedded in one side of the front end face of the furnace body, a closed groove is arranged on the front end face of the furnace body, a connecting sleeve is arranged on the closed groove, and a mounting plate is arranged on one side of the closed groove. The connecting sleeve is provided with an air-tight door, two pairs of connecting plates are symmetrically arranged on the outer side wall of the air-tight door, and hand-twisting screw discs used for fixing the air-tight door are arranged on the two pairs of connecting plates. Through the arrangement of the abutting ring, accurate limiting and sealing of the air-tight door can be achieved, and the structural stability and the sealing performance of the connecting sleeve under the high-temperature and vacuum environment are guaranteed; by arranging the heat insulation convex sleeve, high temperature in the furnace can be effectively prevented from being conducted to the airtight door, and the surface temperature of the airtight door is reduced; and through the arrangement of the hand-twisting screw disc, the stability and the sealing performance of the air-tight door during closing can be further enhanced, and the air-tight door is prevented from loosening due to pressure change or vibration in the furnace.

Description

Technical Field

[0001] This utility model relates to the field of low-hydroxyl quartz glass preparation technology, and in particular to a vacuum furnace for preparing low-hydroxyl quartz glass. Background Technology

[0002] Hydroxyl groups are one of the most significant structural defects in quartz glass. Their presence breaks Si-O bonds, reducing the chemical stability of the quartz glass. At lower temperatures, the effect of hydroxyl groups on the viscosity of quartz glass is more pronounced, and they also affect the absorption of light of various wavelengths, thus affecting the spectral transmittance of the quartz glass. Therefore, reducing the hydroxyl content is crucial to obtaining high-performance quartz glass. Existing preparation equipment suffers from poor furnace sealing, which easily leads to air leakage into the furnace, and also has the disadvantage of poor heat insulation uniformity of the sealed door. Therefore, this application designs a vacuum furnace for preparing low-hydroxyl quartz glass to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a vacuum furnace for preparing low-hydroxyl quartz glass.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a vacuum furnace for preparing low-hydroxyl quartz glass, comprising a furnace body, an air outlet at the top of the furnace body, an operation screen embedded in one side of the front end face of the furnace body, a closing groove on the front end face of the furnace body, a connecting sleeve on the closing groove, an mounting plate on one side of the closing groove, a sealed door on the connecting sleeve, two pairs of connecting plates symmetrically arranged on the outer wall of the sealed door, and hand-twisted screws for fixing the sealed door on the two pairs of connecting plates.

[0005] Preferably, the sealed door has a semi-circular arc shape inside, and a heat-insulating protrusion is installed inside the sealed door. A fixing ring is fixedly connected to the outer wall of the heat-insulating protrusion.

[0006] Preferably, the fixing ring is provided with a plurality of bolts for fixing, and an abutment ring is provided on one side of the fixing ring.

[0007] Preferably, the inner wall of the connecting sleeve is provided with an abutment groove for limiting positioning.

[0008] Preferably, a hinge plate is hinged to the mounting plate, and one end of the hinge plate is fixed to the outer wall of the airtight door.

[0009] Preferably, a high-temperature resistant flexible sealing strip is embedded on the contact surface between the connecting sleeve and the airtight door.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: In this utility model, the cooperation between the connecting sleeve and the airtight door can significantly improve the sealing performance of the furnace body and effectively prevent air leakage into the furnace; the cooperation between the abutting groove and the abutting ring can achieve accurate positioning and sealing of the airtight door, ensuring the structural stability and sealing performance of the connecting sleeve under high temperature and vacuum environments; the setting of the heat-insulating convex sleeve can effectively block the high temperature inside the furnace from being conducted to the airtight door, reducing the surface temperature of the airtight door; the setting of the hand-twisted screw can further enhance the stability and sealing of the airtight door when it is closed, preventing the airtight door from loosening due to changes in furnace pressure or vibration. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0012] Figure 1 This is a schematic diagram of the structure proposed in this utility model;

[0013] Figure 2 This is a schematic diagram of the overall internal structure proposed in this utility model;

[0014] Figure 3 This is a half-sectional schematic diagram of the airtight door proposed in this utility model;

[0015] Figure 4 This is a half-sectional view of the connecting sleeve proposed in this utility model.

[0016] The numbers in the diagram are: 1. Furnace body; 2. Control panel; 3. Closure groove; 4. Airtight door; 5. Hinge plate; 6. Hand-twisted screw disc; 7. Connecting sleeve; 8. Mounting plate; 9. Heat insulation protrusion; 10. Abutment ring; 11. Connecting plate; 12. Fixing ring; 13. Abutment groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Example: See Figure 1-4This utility model discloses a vacuum furnace for preparing low-hydroxyl quartz glass, comprising a furnace body 1. The top of the furnace body 1 has an air outlet for facilitating the discharge of hot and exhaust gases generated within the furnace. An operation screen 2 is embedded on one side of the front face of the furnace body 1, allowing for easy viewing and control of various parameters of the vacuum furnace. A closing groove 3 is formed on the front face of the furnace body 1, providing precise positioning and accommodating space for the closing of a sealed door 4, ensuring a tight fit between the sealed door 4 and the connecting sleeve 7 when closed. The connecting sleeve 7 is provided on the closing groove 3, facilitating the bearing of the weight of the sealed door 4 and its operation during opening and closing. The friction force; a mounting plate 8 is provided on one side of the closed groove 3, and a sealing door 4 is provided on the connecting sleeve 7. The sealing door 4 facilitates the tight closure of the opening at the front end of the furnace body 1 during the operation of the vacuum furnace, effectively preventing external air from entering the furnace and preventing the leakage of high-temperature gas inside the furnace; two pairs of connecting plates 11 are symmetrically provided on the outer wall of the sealing door 4. The connecting plates 11 facilitate the even transmission of the tightening force of the hand-twisted screw 6 to the sealing door 4, enhancing the stability and sealing performance of the sealing door 4 when closed; the two pairs of connecting plates 11 are provided with hand-twisted screw 6 for fixing the sealing door 4. The hand-twisted screw 6 facilitates the quick and reliable fixing and unlocking of the sealing door 4.

[0019] In this invention, the sealed door 4 has a semi-circular arc shape inside, and a heat-insulating sleeve 9 is installed inside the sealed door 4. A fixing ring 12 is fixed to the outer wall of the heat-insulating sleeve 9. The heat-insulating sleeve 9 effectively blocks the high temperature inside the furnace from being conducted to the outside of the furnace body 1, reducing the surface temperature of the sealed door 4. The fixing ring 12 is provided with multiple bolts for fixing, and an abutment ring 10 is provided on one side of the fixing ring 12. The fixing ring 12 makes it easy to firmly fix the heat-insulating sleeve 9 inside the sealed door 4, ensuring the positional stability of the heat-insulating sleeve 9 in harsh environments such as high temperature, vacuum, and vibration. The inner wall of the connecting sleeve 7 is open. A retaining groove 13 is provided for limiting the position, which facilitates precise limiting and sealing of the airtight door 4, ensuring the sealing and stability between the airtight door 4 and the connecting sleeve 7 when closed; a hinge plate 5 is hinged on the mounting plate 8, with one end of the hinge plate 5 fixed to the outer wall of the airtight door 4, which allows the airtight door 4 to flexibly and smoothly open and close around its axis; a high-temperature resistant flexible sealing strip is embedded on the contact surface between the connecting sleeve 7 and the airtight door 4, which facilitates filling the tiny gaps between the connecting sleeve 7 and the airtight door 4.

[0020] Working Principle: In the use of this utility model, firstly, the fixing ring 12 is firmly fixed to the heat insulation protrusion 9 inside the sealed door 4 with bolts, ensuring the positional stability of the heat insulation protrusion 9 under high temperature and vibration environments and preventing it from shifting or falling off. Next, after materials are added into the furnace body 1, the sealed door 4 is connected by the hinge plate 5 on the mounting plate 8, allowing the sealed door 4 to close flexibly and smoothly around its axis. Simultaneously, the closing groove 3 provides precise positioning and accommodating space for the closing of the sealed door 4, ensuring that the sealed door 4 can fit tightly with the connecting sleeve 7 when closed, forming a complete sealing structure to prevent leakage of high-temperature gas and vacuum environment inside the furnace, ensuring the safety and stability of the preparation process. The connecting sleeve 7 supports... Due to the weight of the sealed door 4 and the friction during the opening and closing process, the abutment groove 13 on its inner wall fits tightly with the abutment ring 10 on the sealed door 4, achieving precise positioning and sealing of the sealed door 4, ensuring the structural stability and sealing performance of the connecting sleeve 7 under high temperature and vacuum conditions. Through the two pairs of connecting plates 11 symmetrically arranged on the outer wall of the sealed door 4, the hand-twisted screw disc 6 can be manually rotated to evenly transmit the fastening force of the hand-twisted screw disc 6 to the sealed door 4, achieving rapid fixing and unlocking of the sealed door 4. Finally, after the preparation is completed, the air in the furnace is extracted by controlling the operation panel 2 to reduce the pressure in the furnace and take out the processed product, completing the reset. Thus, the use of a vacuum furnace for preparing low hydroxyl quartz glass ends.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A vacuum furnace for preparing low-hydroxyl quartz glass, comprising a furnace body (1), characterized in that: The furnace body (1) has an air outlet at the top, and an operation screen (2) is embedded on one side of the front end face of the furnace body (1). A closing groove (3) is opened on the front end face of the furnace body (1). A connecting sleeve (7) is provided on the closing groove (3). An installation plate (8) is provided on one side of the closing groove (3). A sealed door (4) is provided on the connecting sleeve (7). Two pairs of connecting plates (11) are symmetrically provided on the outer wall of the sealed door (4). A hand-twisted screw plate (6) for fixing the sealed door (4) is provided on the two pairs of connecting plates (11).

2. The vacuum furnace for preparing low-hydroxyl quartz glass according to claim 1, characterized in that: The sealed door (4) is semi-circular inside, and a heat insulation protrusion (9) is installed inside the sealed door (4). A fixing ring (12) is fixedly connected to the outer wall of the heat insulation protrusion (9).

3. The vacuum furnace for preparing low-hydroxyl quartz glass according to claim 2, characterized in that: The fixing ring (12) is provided with a plurality of bolts for fixing, and an abutment ring (10) is provided on one side of the fixing ring (12).

4. A vacuum furnace for preparing low-hydroxyl quartz glass according to claim 2, characterized in that: The inner wall of the connecting sleeve (7) is provided with an abutment groove (13) for limiting the position.

5. A vacuum furnace for preparing low-hydroxyl quartz glass according to claim 1, characterized in that: A hinge plate (5) is hinged to the mounting plate (8), and one end of the hinge plate (5) is fixed to the outer wall of the airtight door (4).

6. A vacuum furnace for preparing low-hydroxyl quartz glass according to claim 1, characterized in that: The contact surface between the connecting sleeve (7) and the airtight door (4) is inlaid with a high-temperature resistant flexible sealing strip.

Images