Electronic-grade reduction furnace silver composite board welding protection device
By using protective cover and negative pressure absorption technology in electronic-grade reduction furnaces, the problem of adhesion of impurity compounds during welding of silver composite plates is solved, and the purity of silicon material is improved and the welding area is protected.
Patent Information
- Application Number
- CN202323443981.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-18
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-18
AI Technical Summary
In electronic-grade reduction furnace, due to the high thermal conductivity and low melting point of silver in the welding process of silver composite plate, a large amount of silver vapor is generated during welding, resulting in silver oxide and silver nitride adhering to the surface of the silver plate, affecting the purity of the silicon material. The range of protective gases of argon arc welding torch is limited, making it difficult to effectively prevent the generation of impurity compounds.
A welding protection device including protective cover, porous plate, air intake pipe, air extraction pipe and partition is designed. Through inert gas protection and negative pressure absorption technology, a stable laminar gas environment is formed to prevent impurity gas from entering the welding area. It also absorbs smoke and metal steam during welding, expands the protection range and improves the air isolation effect.
It effectively reduces the generation of silver oxide and silver nitride, improves the purity of silicon material, improves the quality of the welds of silver composite plates, ensures high purity protection in the welding area, and extends the service life of the device.
Smart Images
Figure CN222243042U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of silicon production, in particular to a silver composite plate welding protection device for an electronic-grade reduction furnace. Background Art
[0002] Electronic-grade reduction furnaces are used to produce chip-grade silicon materials, and they have strict control over impurity elements. During the welding process of the silver composite plate in the bell jar of the electronic-grade reduction furnace, due to the good thermal conductivity of silver, a large current is required for welding, and the temperature of the welding molten pool is relatively high. Because the melting point of silver is low, the welding molten pool will produce a large amount of silver metal vapor at high temperature. When the silver vapor meets the air, black silver oxide and yellow silver nitride are produced, which adhere to the silver plate and pollute the silver plate. In addition, due to the fast heat transfer of silver, the high-temperature area around the welding molten pool is expanded, and the protective gas protection range of the argon arc welding gun is limited. The surface of the silver composite plate slightly away from the welding gun is prone to produce various compounds such as silver oxide and silver nitride. These compounds on the surface of the silver composite plate will affect the purity of the final silicon material. Therefore, the silver composite plate needs to be protected and the content of the compounds needs to be strictly controlled. Utility Model Content
[0003] In view of the above-mentioned shortcomings, the utility model provides an electronic grade reduction furnace silver composite plate welding protection device, which can protect the surface of the silver composite plate, effectively reduce the generation of compounds such as silver oxide and silver nitride, and thus improve the purity of silicon material.
[0004] In order to achieve the above object, the embodiment of the utility model adopts the following technical solution:
[0005] A welding protection device for a silver composite plate of an electronic grade reduction furnace comprises a protection cover body, one side of the protection cover body is provided with an arc opening adapted to a argon arc welding gun, and is characterized in that a baffle is provided on the lower edge of the protection cover body, a porous plate is provided at the bottom of the protection cover body, and an air inlet pipe connected to the protection cover body is provided on the protection cover body, and the air inlet pipe is used to introduce inert gas.
[0006] According to one aspect of the utility model, the protective cover body is further provided with an exhaust pipe, which is connected to the negative pressure device and is used to extract smoke and metal vapor generated during the welding process.
[0007] According to one aspect of the utility model, a partition is provided inside the protective cover, and the partition divides the space inside the protective cover into an upper cavity and a lower cavity.
[0008] According to one aspect of the utility model, the air extraction pipe is connected to the upper cavity, and the lower cavity is connected to the air intake pipe.
[0009] According to one aspect of the utility model, a gap is provided between the arc-shaped opening and the argon arc welding gun.
[0010] According to one aspect of the utility model, the enclosure includes three enclosure pieces arranged at the lower edge of the protective cover body, the adjacent enclosure pieces are sealed and connected, and the enclosure pieces are trapezoidal. .
[0011] According to one aspect of the utility model, the lower edge of the enclosure is in contact with the surface of the workpiece to be welded.
[0012] According to one aspect of the utility model, the enclosure is made of flexible material.
[0013] The advantages of the implementation of the utility model are as follows: the lower cavity forms a pressure equalizing cavity with stable pressure through the inert protective gas, so that the gas pressure on the surface of the porous plate is basically uniform, and the inert protective gas enters the area formed by the enclosure from the small holes of the porous plate to form a stable laminar flow, and the impurity gas will not be drawn into the welding area due to turbulence, so that the protection area of the workpiece to be welded will not be mixed with other gases such as air, thereby ensuring the protection effect on the silver surface; the negative pressure absorption device absorbs the metal vapor and smoke generated during welding through the exhaust pipe and the upper cavity to prevent the smoke and metal vapor from adhering to the surface of the silver composite plate, solve the problem of metal compounds near the weld of the electronic grade reduction furnace silver composite plate and yellowing and blackening of the weld, and reduce the impurity content in the weld and the vicinity of the electronic grade reduction furnace silver composite plate, and improve the weld quality of the electronic grade reduction furnace silver composite plate; the bottom of the protective cover is provided with an enclosure to expand the welding protection range. During welding, the lower edge of the enclosure fits with the surface of the workpiece to be welded, reducing the leakage of the inert protective gas, and the air isolation effect is good, so that the inert protective gas in the enclosure is kept at a high purity, and the generation of compounds on the surface of the silver layer is avoided. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0015] Figure 1 It is a structural schematic diagram of the utility model;
[0016] Figure 2 It is a schematic structural diagram of the protective cover body of the utility model.
[0017] 1. Protective cover; 2. Argon arc welding gun; 3. Arc opening; 4. Enclosure; 5. Perforated plate; 6. Upper cavity; 7. Lower cavity; 8. Exhaust pipe; 9. Inlet pipe; 10. Partition. DETAILED DESCRIPTION
[0018] 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.
[0019] like Figure 1 , Figure 2 As shown, a welding protection device for silver composite plates of an electronic grade reduction furnace comprises a protection cover body 1, one side of the protection cover body 1 is provided with an arc opening 3 adapted to an argon arc welding gun 2, a baffle 4 is provided at the bottom of the protection cover body 1, a porous plate 5 is provided between the protection cover body 1 and the baffle 4, and an air inlet pipe 9 connected to the protection cover body 1 is provided on the protection cover body 1, and the air inlet pipe 9 is used to introduce inert gas. During use, the inert shielding gas is sent into the protective cover body 1 through the air inlet pipe 9, and then the protective cover body 1 is placed in the welding area of the workpiece to be welded, and the arc opening 3 is kept at a certain distance from the argon arc welding gun 2, and then the argon arc welding gun 2 starts arc welding. At this time, the protective cover body 1 moves synchronously with the argon arc welding gun 2, and always keeps a certain distance from the argon arc welding gun 2. During this process, a pressure equalization chamber with stable pressure is formed inside the protective cover body 1 through the inert shielding gas, so that the gas pressure on the surface of the porous plate 5 is basically uniform, and the inert shielding gas enters the area formed by the enclosure 4 through the small holes of the porous plate 5. Since the aperture of the porous plate 5 is small, a stable laminar flow is formed under a certain pressure, and impurity gases will not be drawn into the welding area due to turbulence, so that other gases such as air are not mixed into the protection area of the workpiece to be welded, thereby ensuring the protection effect on the surface of the silver composite plate.
[0020] In practical applications, the protective cover body 1 is also provided with an exhaust pipe 8, which is connected to the negative pressure device and is used to extract the smoke and metal vapor generated during the welding process. The metal vapor and smoke generated during welding are sucked away by the negative pressure absorption device (such as a vacuum cleaner), preventing the smoke and metal vapor from adhering to the surface of the silver composite plate, solving the problem of metal compounds near the weld of the electronic grade reduction furnace silver composite plate and the yellowing and blackening of the weld, improving the weld quality of the electronic grade reduction furnace silver composite plate, reducing the impurity content in the weld and its vicinity of the electronic grade reduction furnace silver composite plate, and further improving the protection effect on the surface of the silver composite plate.
[0021] In practical applications, a partition 10 is provided inside the protective cover 1, and the partition 10 divides the space inside the protective cover into an upper cavity 6 and a lower cavity 7, thereby ensuring that the upper cavity 6 and the lower cavity 7 will not affect each other.
[0022] In practical applications, the exhaust pipe 8 is connected to the upper cavity 6, and the lower cavity 7 is connected to the air inlet pipe 9. The upper cavity 6 absorbs the metal vapor and smoke generated during welding from the exhaust pipe 8 through a negative pressure absorption device (such as a vacuum cleaner) to prevent the smoke and metal vapor from adhering to the surface of the silver composite plate. The lower cavity 7 forms a pressure equalization chamber with a stable pressure through an inert protective gas, so that the gas pressure on the surface of the porous plate 5 is basically uniform, and a stable laminar flow is formed at the porous plate 5, which effectively prevents impurity gas from entering the welding area.
[0023] In practical applications, a gap is provided between the arc opening 3 and the argon arc welding gun 2 to prevent the argon arc welding gun 2 from damaging the welding protection device.
[0024] In practical applications, the enclosure 4 includes three enclosure pieces arranged at the lower edge of the protective cover body, and the adjacent enclosure pieces are sealed and connected, and the enclosure pieces are trapezoidal. By setting the enclosure pieces, the leakage of the inert protective gas can be reduced, the air isolation effect is good, and the enclosure pieces are trapezoidal, which is convenient for expanding the welding protection range.
[0025] The three enclosure pieces are respectively arranged in three directions of the non-arc opening direction of the lower edge of the protection cover body.
[0026] In practical applications, the lower edge of the enclosure 4 fits the surface of the workpiece to be welded, which further reduces the leakage of the inert protective gas, improves the air isolation effect, keeps the inert protective gas in the enclosure 4 at a high purity, and avoids the formation of compounds on the surface of the silver layer.
[0027] In practical applications, the enclosure 4 is made of flexible material, so that the enclosure 4 is easier to fit on the surface of the workpiece to be welded, and the air isolation effect is better.
[0028] In practical applications, the enclosure 4 is made of high temperature resistant cloth to prevent the enclosure 4 from being damaged by high temperature during welding and extend its service life.
[0029] In summary, the method for using the electronic grade reduction furnace silver composite plate welding protection device provided in this embodiment is as follows: when in use, an inert protective gas is sent into the lower cavity 7 through the air inlet pipe 9, and then the negative pressure absorption device is connected to the exhaust pipe 8, and the negative pressure absorption device is turned on, and then the protective cover body 1 is placed in the welding area of the workpiece to be welded, and a certain distance is maintained between the arc opening 3 and the argon arc welding gun 2, and then the argon arc welding gun 2 starts arc welding. At this time, the protective cover body 1 moves synchronously with the argon arc welding gun 2 and always maintains a certain distance from the argon arc welding gun 2. During this process, the lower cavity 7 forms a pressure equalization cavity with a stable pressure through the inert protective gas, so that the porous The gas pressure on the surface of the plate 5 is basically uniform, and the inert protective gas enters the area formed by the enclosure 4 through the small holes of the porous plate 5. Due to the small aperture of the porous plate 5, a stable laminar flow is formed under a certain pressure, and the impurity gas will not be drawn into the welding area due to turbulence, so that the air and other gases are not mixed into the protection area of the workpiece to be welded, thereby ensuring the protection effect of the silver surface. At the same time, the vacuum cleaner absorbs the metal vapor and smoke generated during welding through the exhaust pipe 8 and the upper cavity 6 to prevent the smoke and metal vapor from adhering to the surface of the silver composite plate. When the welding is completed, the argon arc welding gun 2 is turned off, and after waiting for a period of time, the argon arc welding gun 2 is turned on and the protective device is removed.
[0030] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.
Claims
1. A welding protection device for silver composite plates of an electronic-grade reduction furnace, comprising a protection cover (1), one side of the protection cover (1) is provided with an arc-shaped opening (3) adapted to a argon arc welding gun (2), characterized in that: The lower edge of the protective cover body (1) is provided with a baffle (4), the bottom of the protective cover body (1) is provided with a porous plate (5), and the protective cover body (1) is provided with an air inlet pipe (9) connected to the protective cover body, and the air inlet pipe (9) is used to introduce inert gas.
2. The electronic grade reduction furnace silver composite plate welding protection device according to claim 1, characterized in that: The protective cover body (1) is also provided with an exhaust pipe, which is connected to the negative pressure device and is used to extract smoke and metal vapor generated during the welding process.
3. The electronic grade reduction furnace silver composite plate welding protection device according to claim 2, characterized in that: A partition (10) is provided inside the protective cover body (1), and the partition (10) divides the space inside the protective cover body into an upper cavity and a lower cavity.
4. The electronic grade reduction furnace silver composite plate welding protection device according to claim 3, characterized in that: The air extraction pipe (8) is in communication with the upper cavity (6), and the lower cavity (7) is in communication with the air intake pipe (9).
5. The electronic grade reduction furnace silver composite plate welding protection device according to claim 1, characterized in that: A gap is provided between the arc-shaped opening (3) and the argon arc welding gun (2).
6. The electronic grade reduction furnace silver composite plate welding protection device according to any one of claims 1 to 5, characterized in that: The enclosure (4) comprises three enclosure pieces arranged on the lower edge of the protective cover body (1), adjacent enclosure pieces are sealed and connected, and the enclosure pieces are trapezoidal.
7. The electronic grade reduction furnace silver composite plate welding protection device according to claim 6, characterized in that: The lower edge of the enclosure (4) is in contact with the surface of the workpiece to be welded.
8. The electronic grade reduction furnace silver composite plate welding protection device according to claim 6, characterized in that: The enclosure (4) is made of flexible material.