Automatic quartz tube splicing device
By using two welding gun sets and a gradient heater design in the automatic quartz tube splicing device, two rings of weld seams are formed, which solves the problem of low quartz tube sealing qualification rate and achieves higher sealing reliability and lower tube burst rate.
Patent Information
- Application Number
- CN202423002615.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-06
AI Technical Summary
In the current technology, the pass rate of quartz tube sealing is between 85% and 95%, and the reliability of sealing needs to be improved.
An automatic quartz tube splicing device is adopted, which uses two welding gun groups to heat the upper and lower parts of the quartz cap respectively to form two rings of weld. Through the design of gradient heater and support ring, the angle arrangement and position adjustment of the welding guns can be realized to ensure temperature uniformity and reduce stress concentration.
It improved the pass rate of quartz tube sealing, reduced the tube burst rate, enhanced sealing reliability, and lowered the initial installation accuracy requirements.
Smart Images
Figure CN223561470U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to quartz tube welding technical field especially relates to a quartz tube automatic splicing device. BACKGROUND
[0002] The synthesis of indium phosphide polycrystal is carried out in a high-vacuum quartz tube. First, the quartz tube is placed horizontally, a quartz boat containing phosphorus and a quartz boat containing indium are placed at two ends of the quartz tube respectively, the quartz tube is sealed by a quartz cap after being vacuumized to avoid air mixing. Four hydrogen-oxygen welding guns are used to heat the quartz tube around the cap at the same time to melt the quartz tube at the position, and the melted quartz tube is slightly concave inward under the action of negative pressure in the quartz tube and is fused with the cap, so that the sealing of the quartz tube is realized. The sealing quality rate of the quartz tube in the prior art is between 85% and 95%, and the reliability of the sealing of the quartz tube needs to be improved. SUMMARY
[0003] In order to further improve the sealing quality rate of the quartz tube, the utility model provides a quartz tube automatic splicing device, and the sealing quality rate of the quartz tube is further improved by forming two welds.
[0004] The utility model provides a technical scheme: a quartz tube automatic splicing device, including quartz tube, quartz cap, positioning frame and welding gun group, the positioning frame fixes two ends of the horizontally placed quartz tube, the welding gun group is located in the circumference of the quartz tube, and each welding gun head in the welding gun group is aligned with the quartz tube, the welding gun group has two, one welding gun group is aligned with the quartz tube on the upper part of the quartz cap, and the other welding gun group is aligned with the quartz tube on the lower part of the quartz cap, the welding guns in the two welding gun groups are arranged at an angle, so that the temperature distribution of the circumference of the quartz tube is more uniform, and stress concentration is reduced.
[0005] Further technical scheme is that the outside of the quartz tube is provided with a gradient heater, the gradient heater is gradient for preheating the quartz tube, and the purpose is to reduce stress; the welding gun is fixed in the gradient heater and moves along with the movement of the gradient heater; the outside of the gradient heater is provided with a shell, a supporting ring is arranged in the shell, and a rotating bearing is arranged between the gradient heater and the supporting ring, so that the gradient heater can rotate relative to the supporting ring.
[0006] Further technical scheme is that an axial guide rail is arranged on the shell, and the supporting ring is matched with the shell through the guide rail, so that the supporting ring can move axially relative to the shell.
[0007] Further technical scheme is that the quartz tube automatic splicing device further includes a driving gear, an outer gear ring is fixed to the outside of the gradient heater, and the driving gear and the outer gear ring are engaged, so that the gradient heater and the welding gun are driven to rotate through the driving gear.
[0008] Further technical solutions are that the end of the support ring is fixedly connected with a threaded adjusting rod, and the position of the support ring is moved by rotating the threaded adjusting rod, so that the gradient heater and the welding gun position are adjusted.
[0009] Compared with the prior art, the quartz tube sealing device has the beneficial effects that:
[0010] 1. The quartz tube sealing device has two welding gun groups, and the quartz tube flame at the upper and lower parts of the quartz sealing cap is heated to a molten state. Under the action of negative pressure in the quartz tube, the quartz tube is slightly concave inward, and a circle of welding seam is formed at the upper and lower ends of the quartz sealing cap. The sealing reliability of the two circles of welding seam is higher, so that the sealing tube qualification rate of the quartz tube is improved.
[0011] 2. The welding guns in the two welding gun groups are arranged at an angle, so that the temperature of the entire quartz tube is more uniform in the circumferential direction, stress concentration is reduced, and the pipe explosion rate is reduced.
[0012] 3. The axial position of the welding gun relative to the quartz tube can be realized by moving the support ring. If the position of the welding gun is not accurate during initial installation, it can be moved later, so that the initial installation precision requirement is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 is a structural schematic diagram of the whole quartz tube sealing device.
[0014] Figure 2 is a schematic diagram of the two welding gun groups in the quartz tube sealing device distributed in the circumferential direction of the gradient heater.
[0015] In order to distinguish Figure 2 the two welding gun groups, the two welding gun groups are indicated by thick lines and thin lines.
[0016] In the figure: 1, threaded adjusting rod; 2, guide rail; 3, support ring; 4, gradient heater; 5, welding gun; 6, positioning frame; 7, shell; 8, quartz sealing cap; 9, quartz tube; 10, rotating bearing; 11, outer gear ring; 12, driving gear. DETAILED DESCRIPTION
[0017] In order to make the technical problems, technical solutions and beneficial effects of the quartz tube sealing device to be solved more clear and obvious, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the quartz tube sealing device, and are not used to limit the quartz tube sealing device.
[0018] The embodiment discloses a quartz tube 9 automatic splicing device, like Figures 1-2As shown, the structure comprises a quartz tube 9, a quartz sealing cap 8, a positioning frame 6 and a welding gun 5 group. The positioning frame 6 fixes the two ends of the horizontally placed quartz tube 9. The outer side of the quartz tube 9 is provided with a gradient heater 4, which preheats the quartz tube 9 in a gradient, aiming to reduce stress. The welding gun 5 group is located in the circumference of the quartz tube 9, and each welding gun 5 in the welding gun 5 group is aligned with the quartz tube 9. The welding gun 5 group has two groups, one of which is aligned with the quartz tube 9 on the upper part of the quartz sealing cap 8, and the other is aligned with the quartz tube 9 on the lower part of the quartz sealing cap 8. The two welding gun 5 groups flame heat the quartz tube 9 on the upper and lower parts of the quartz sealing cap 8 to a molten state. Under the action of negative pressure in the quartz tube 9, the corresponding quartz tube 9 on the upper end surface of the quartz sealing cap 8 is slightly concave inward, and the corresponding quartz tube 9 on the lower part of the quartz sealing cap 8 is slightly concave inward, forming two circles of welds, which have higher sealing reliability, thereby realizing the improvement of the sealing tube qualification rate of the quartz tube 9. The welding guns 5 in the two welding gun 5 groups are arranged at an angle, so that the temperature distribution of the quartz tube 9 in the circumference is more uniform, and stress concentration is reduced.
[0019] The outer side of the gradient heater 4 is provided with a shell 7, the shell 7 is provided with a support ring 3, and a rotating bearing 10 is arranged between the gradient heater 4 and the support ring 3, so that the gradient heater 4 can rotate relative to the support ring 3. The quartz tube 9 automatic splicing device further comprises a driving gear 12, and the outer side of the gradient heater 4 is fixedly connected with an outer gear ring 11. The driving gear 12 and the outer gear ring 11 are engaged, so that the gradient heater 4 and the welding gun 5 are driven to rotate by the driving gear 12, thereby heating the quartz tube 9 in the circumference and bonding with the quartz sealing cap 8.
[0020] The shell 7 is provided with an axial guide rail 2, and the support ring 3 cooperates with the shell 7 through the guide rail 2, so that the support ring 3 can move axially relative to the shell 7. The end of the support ring 3 is fixedly connected with a threaded adjusting rod 1, and the position of the support ring 3 is moved by rotating the threaded adjusting rod 1, thereby realizing the adjustment of the position of the gradient heater 4 and the welding gun 5. If the position of the welding gun 5 is not accurate during initial installation, it can be moved later, thereby reducing the initial installation precision requirement.
Claims
1. An automatic splicing device for a quartz tube (9), comprising a quartz tube (9), a quartz cap (8), a positioning frame (6) and a welding torch group. The positioning frame (6) fixes both ends of the horizontally placed quartz tube (9), and the welding torch group is located circumferentially around the quartz tube (9). Each welding torch (5) head in the welding torch group is aligned with the quartz tube (9). It is characterized in that: The two welding torch groups are arranged at an angle.
2. The automatic quartz tube (9) splicing device according to claim 1, characterized in that: The outer side of the quartz tube (9) is provided with a gradient heater (4), the welding torch (5) is fixed in the gradient heater (4), the outer side of the gradient heater (4) is provided with a shell (7), the shell (7) is provided with a support ring (3), a rotating bearing (10) is arranged between the gradient heater (4) and the support ring (3), so that the gradient heater (4) can rotate relative to the support ring (3).
3. The automatic quartz tube (9) splicing device according to claim 2, characterized in that: The shell (7) is provided with an axial guide rail (2), the support ring (3) is matched with the shell (7) through the guide rail (2), so that the support ring (3) can move axially relative to the shell (7).
4. The automatic quartz tube (9) splicing device according to claim 2, characterized in that: The automatic quartz tube (9) splicing device further comprises a driving gear (12), the outer side of the gradient heater (4) is fixed with an outer gear ring (11), the driving gear (12) and the outer gear ring (11) are engaged, so that the gradient heater (4) and the welding torch (5) are driven to rotate through the driving gear (12).
5. The automatic quartz tube (9) splicing device according to claim 2, characterized in that: The end of the support ring (3) is fixed with a threaded adjusting rod (1), the position of the support ring (3) is moved by rotating the threaded adjusting rod (1), so that the position of the gradient heater (4) and the welding torch (5) is adjusted.