Gas-driven automatic lifting stirring device

Abstract

This invention discloses a gas-driven, automatically lifting and stirring device, comprising a housing, a lifting rod, a rotating shaft, a turbine, and a piston. The uppermost part of the housing is a pressure chamber, through which compressed gas enters to control the lifting rod's movement. The turbine is mounted and fixed on the rotating shaft, with a piston positioned above and below the turbine via the shaft. The top of the rotating shaft connects to the lower part of the lifting rod via the same piston. The turbine has an inlet and an outlet, allowing compressed gas to enter and drive its rotation. This invention provides both lifting and stirring functions, both driven by compressed gas. It solves the problems of electrically driven stirring devices being prone to short circuits, corrosion, and difficulty adapting to high-temperature and high-pressure environments. Furthermore, the lifting mechanism enables intermittent stirring of the reaction solution. Introducing compressed gas as the driving force not only reduces the manufacturing cost of the lifting and rotating device but also increases the equipment's safe operation.

Description

Technical Field

[0001] This invention relates to the field of automatic lifting and stirring devices, and in particular to a gas-driven automatic lifting and stirring device. Background Technology

[0002] High-temperature, high-pressure solution (HTPS) is currently a method for growing gallium nitride (GaN) single crystals, a third-generation semiconductor. This method requires temperatures of approximately 600-900°C and pressures of 1-10 MPa. The atmosphere includes easily oxidized, corroded, or decomposed substances such as nitrogen, alkanes, and oxygen. The solution used is a molten gallium-sodium melt containing a small amount of nitrogen ions. The HTPS apparatus for growing GaN typically involves placing a crucible containing the GaN melt into a nitrogen-filled chamber. In this apparatus, nitrogen gradually dissolves in the melt under high pressure to form nitrogen ions, which then react with gallium ions in the melt to form GaN single crystals. Therefore, to achieve the growth of this single crystal material, the reactor must meet high-temperature, high-pressure conditions, and the growth time is relatively long, currently approximately 96-300 hours. Furthermore, nitrogen has very low solubility in the melt and exhibits extremely slow mass transfer. Therefore, to achieve a uniform concentration distribution in the high-temperature solution, accelerate liquid-phase mass transfer, and improve growth rate and quality, installing a stirring device on the crucible or melt is generally a feasible approach. Current stirring methods typically involve installing a stirring shaft at the bottom of a high-temperature, high-pressure chamber. This shaft rotates the entire crucible, causing the melt to rotate and achieving autonomous stirring. A motor is connected to the bottom of the stirring shaft, electrically driving the stirring device. However, the motor's power system and components, including coils, circuits, and wires, generally need to operate at low temperatures. Therefore, the chamber is usually quite large, and auxiliary devices such as water cooling are added around the motor to prevent damage to components from high temperatures. Furthermore, the overall rotation of the crucible makes it difficult to effectively control the stirring of the melt inside, and it is also affected by the viscosity of the melt. Summary of the Invention

[0003] Based on this, the purpose of the present invention is to provide a gas-driven automatic lifting and stirring device, which has the dual functions of lifting and stirring. By introducing compressed gas as the driving force, it not only reduces the processing and manufacturing cost of the lifting and rotating device, but also increases the safe operation of the equipment.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A gas-driven, automatically lifting and stirring device includes a housing, a lifting rod, a rotating shaft, and a turbine. The lifting rod and the rotating shaft are located on the central axis of the housing. The upper part of the housing is a pressure chamber, and a first positioner and a second positioner are fixedly installed inside the housing. The lifting rod is fitted with a first piston, a spring, and a fixed baffle from top to bottom. The turbine is fixedly installed on the rotating shaft, and a second piston is provided above the turbine. The lower end of the lifting rod and the upper end of the rotating shaft are fixedly installed on the second piston. A third piston is provided below the turbine and is fitted on the rotating shaft. The turbine cavity is provided with a compressed gas inlet and a compressed gas outlet.

[0006] Furthermore, the first piston is positioned between the first positioner and the second positioner.

[0007] Furthermore, the fixed baffle is located below the second positioner, and the fixed baffle is fixedly installed on the housing. The fixed baffle is provided with air holes.

[0008] Furthermore, the spring is disposed between the first piston and the fixed baffle.

[0009] Furthermore, the compressed gas inlet and the compressed gas outlet are connected to the housing.

[0010] Furthermore, the compressed gas inlet and the compressed gas outlet are arranged in parallel, and their direction is tangent to the cut or tangent line of the outer shell.

[0011] Furthermore, the turbine is mounted on the shaft via a drive key or bolts.

[0012] Furthermore, the turbine is blade-shaped or fan-shaped.

[0013] Furthermore, a protective cavity is formed between the third piston and the fourth piston.

[0014] Furthermore, the pressure chamber is connected to a gas path, facilitating connection to an external compressed gas source.

[0015] The beneficial effects of this invention are:

[0016] 1. This invention uses compressed gas to enable the stirrer to move up and down at any time, thus achieving intermittent stirring of the solution;

[0017] 2. The rotation of the shaft is mainly driven by gas power, and the shaft speed can be adjusted by flow rate and pressure, which saves energy compared to the electric system;

[0018] 3. Traditional electrically driven rotary devices and their supporting devices occupy a large space, have a complex structure, and are heavy, while the device of this invention can be directly fixedly installed above the reaction vessel, which is convenient to install and has a simple structure.

[0019] 4. The circuits in traditional electric drive devices cannot withstand high temperatures, and short circuits and burnt-out components are inevitable during operation, posing a significant safety risk. This invention is mainly composed of metal alloy components, has no circuit structure, and is safer to operate.

[0020] 5. In addition, the alloy components of the present invention can be manufactured using corrosion-resistant materials, making them suitable for use in corrosive gas atmospheres and giving them a wider range of applications compared to traditional circuit components. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the device of the present invention installed on the reaction vessel;

[0022] Figure 2 This is a schematic diagram of the structure of the device of the present invention after it has been lifted.

[0023] Figure 3 This is a schematic diagram of the structure of the device of the present invention after it has been lowered;

[0024] Figure 4 This is a top view of the turbine section of the device of the present invention after descent;

[0025] Explanation of reference numerals in the attached diagram: 1-Lifting and stirring device; 2-Reaction vessel; 21-Internal space of the reaction vessel; 22-Inlet and outlet; 3-Agitator; 4-Stirred liquid; 5-Shell; 6-Lifting rod; 61-First piston; 62-Second piston; 63-Fixed baffle; 64-Spring; 65-First positioner; 66-Second positioner; 67-Pressure chamber; 68-Spring chamber; 69-Gas passage; 7-Rotating shaft; 71-Turbine; 72-Transmission key; 73-Third piston; 74-Fourth piston; 75-Protective chamber; 76-Compressed gas inlet; 77-Compressed gas outlet. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "vertical direction," "up," "down," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be understood that terms such as "installation," "fixing," "sliding," "moving," and "sealing" should be interpreted broadly. For example, the turbine being fixed to the shaft can mean that the turbine and the shaft are machined as a single piece, the turbine is fixed to the shaft via a drive key, or the turbine is fixed to the shaft via screws.

[0029] like Figure 1 As shown, the gas-driven automatic lifting and stirring device 1 of the present invention is fixedly installed on the reactor 2. The fixed installation method includes, but is not limited to, flange, bolt, threaded inner sleeve and other installation methods. The lifting and stirring device 1 is connected to a rotating shaft 7, and a stirrer 3 is fixed at the lower end of the rotating shaft 7. The length of the rotating shaft 7 can be automatically set or replaced according to the liquid level of the stirred liquid 4.

[0030] like Figure 2 , 3 As shown, in this embodiment, the gas-driven automatic lifting and stirring device 1 includes a housing 5, a lifting rod 6, a rotating shaft 7, and a turbine 71. The lifting rod 6 and the rotating shaft 7 are located on the central axis of the housing.

[0031] like Figure 2 , 3 As shown, in this embodiment, the lifting rod 6 and the rotating shaft 7 are jointly fixed on the second piston 62. The lower end of the lifting rod 6 and the upper end of the rotating shaft 7 are fixedly installed on the second piston 62. The second piston 62 can slide up and down along the housing wall, is in a sealed state, and does not rotate when the rotating shaft 7 rotates. The fixed baffle 63 is located above the second piston 62 and is fitted into the lifting rod 6. The fixed baffle 63 has an air hole, and the lifting rod 6 can slide up and down through the fixed baffle 63. The fixed baffle 63 is fixed to the housing 5 and neither slides up and down nor rotates. A spring 64 is fitted onto the fixed baffle 63 and is fitted into the lifting rod 6. The top of the lifting rod 6 is fixed to the first piston 61. The first piston 61 is in a sealed state and can slide up and down. The sliding space is between the first positioner 65 and the second positioner 66. Above the first piston 61 is a pressure chamber 67, and compressed gas enters the pressure chamber 67 through the air passage 69.

[0032] The turbine 71 is fixedly mounted on the rotating shaft 7 via the transmission key 72. Above and below the turbine 71 are the second piston 62 and the third piston 73, respectively. Below the third piston 73 is a fourth piston 74 fitted onto the rotating shaft 7. Between the third piston 73 and the fourth piston 74 is a protective cavity 75 to prevent gas from overflowing into the compressed gas inlet 76 and the compressed gas outlet 77 after the stirring system rises.

[0033] In this embodiment, the gas-driven automatic lifting and stirring device needs to perform three operations: descent control, rotation control, and rise control.

[0034] For descent control: Controllable compressed gas enters pressure chamber 67 through air passage 69, increasing the pressure. Spring 64 undergoes compression deformation. The pressure exerted by the compressed air on the first piston 61 is greater than the spring force. Therefore, the force of the compressed gas pushes the first piston 61, along with the lifting rod 6, rotating shaft 7, second piston 62, third piston 73, turbine 71, and fourth piston 74, downwards as a whole. The first piston 61 moves from its upper position, pressing against the first positioner 65, to its lower position, where it is locked at the second positioner 66. During this movement, the fixed baffle 63 remains stationary, but the lifting rod 6 can slide freely up and down. The fixed baffle 63 has air holes to maintain a constant pressure in spring chamber 68 during the lifting rod 6's ascent and descent. After descent is complete, as... Figure 3 The pressure in pressure chamber 67 is kept constant so that the shaft as a whole remains in a downward state when the shaft 7 rotates.

[0035] Regarding stirring control: After components such as the rotating shaft 7 descend, the device structure diagram is as follows. Figure 3 As shown. At this time, the device is in a gas-driven rotational state. Compressed gas enters the turbine chamber through the compressed gas inlet 76. The inlet pressure drives the turbine to rotate. The turbine speed can be controlled by adjusting the compressed gas flow rate and pressure. After the compressed gas drives the turbine to rotate, it flows out from the compressed gas outlet 77. The turbine 71 is fixed to the rotating shaft 7 via a transmission key 72. When the turbine rotates, it drives the rotating shaft 7 to rotate. When the turbine 71 drives the rotating shaft 7 to rotate, the second piston 62, the third piston 73, and the fourth piston 74 do not rotate.

[0036] For the lifting control: When the compressed gas inlet 76 stops supplying compressed gas, the rotating shaft stops rotating. At this time, the compressed gas in the air passage 69 can be released, the pressure in the pressure chamber 67 decreases, and the lifting rod 6, rotating shaft 7, and turbine 71 move upward as a whole until the first piston 61 presses against the first positioner 65. At this time, the stirring device can be raised or lowered as follows: Figure 2 .

[0037] In this embodiment, the compressed gas inlet 76 and compressed gas outlet 77 of the turbine 71 can be at the same horizontal level in the vertical direction, or they can be spaced apart vertically.

[0038] In this embodiment, as Figure 2 As shown, the compressed gas inlet 76 and compressed gas outlet 77 are positioned vertically with a certain distance between them. In this embodiment, the intersection angle between the inlet and outlet is 0-90°, preferably 0°, which means they are parallel. The compressed gas inlet 76 and compressed gas outlet 77 can be along the tangent or cutting direction of the inner wall of the shell, preferably along the tangent direction.

[0039] In this embodiment, the compressed gas inlet 76 and the compressed gas outlet 77 are parallel to each other, and the compressed gas inlet 76 and the compressed gas outlet 77 are tangential to the inner wall of the housing.

[0040] In this embodiment, after the shaft descends, the positions of the compressed gas inlet 76 and the compressed gas outlet 77 are connected to the position of the turbine 71, preferably at the middle position; after the shaft rises, the positions of the compressed gas inlet 76 and the compressed gas outlet 77 are connected to the protective cavity 75.

[0041] In this embodiment, as Figure 4 As shown, the purpose of turbine 71 is to rotate under the flow pressure of compressed air. One example is a blade-shaped turbine with five blades, but the actual number and shape of turbine blades are not limited to this. Figure 4 As shown.

[0042] In this invention, the turbine shape is, but is not limited to, blade-shaped, fan-shaped, or other shapes that can be rotated by gas.

[0043] In this embodiment, as Figure 2 As shown, the first positioner 65 and the second positioner 66 can be annular rings nested on the inner wall of the housing, or annular grooves can be opened on the inner wall, including but not limited to other similar structures that can achieve the function of fixing the piston.

[0044] The above description merely illustrates preferred technical solutions of the present invention, and while the description is relatively specific and detailed, it should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and the present invention also intends to include these modifications and variations.

Claims

1. A gas-driven, automatically lifting and stirring device, comprising a housing, a lifting rod, a rotating shaft, and a turbine, wherein the lifting rod and the rotating shaft are located on the central axis of the housing, characterized in that, The upper part of the housing is a pressure chamber, and a first positioner and a second positioner are fixedly installed inside the housing. The lifting rod is fitted with a first piston, a spring, and a fixed baffle from top to bottom; The turbine is fixedly mounted on the rotating shaft. A second piston is disposed above the turbine. The lower end of the lifting rod is fixedly mounted on the second piston to the upper end of the rotating shaft. A third piston is disposed below the turbine, and a fourth piston is disposed below the third piston. The third and fourth pistons are sleeved on the rotating shaft, and a protective cavity is formed between the third and fourth pistons. The turbine cavity is provided with a compressed gas inlet and a compressed gas outlet, which are connected to the housing. The compressed gas inlet and the compressed gas outlet are arranged in parallel and are arranged along the tangent or cutting direction of the inner wall of the housing cylinder.

2. A gas powered self-lifting stirring device according to claim 1, characterized in that, The first piston is positioned between the first positioner and the second positioner.

3. A gas powered self-lifting stirring device according to claim 1, wherein, The fixed baffle is located below the second positioner, and the fixed baffle is provided with air holes.

4. A gas powered self-lifting stirring device according to claim 1, wherein, The spring is positioned between the first piston and the fixed baffle.

5. A gas powered self-lifting stirring device according to claim 1, wherein, The turbine is mounted on the shaft via a drive key or bolts.

6. A gas-driven, automatically lifting and stirring device according to claim 5, characterized in that, The turbine is blade-shaped or fan-shaped.

7. A gas-driven, automatically lifting and stirring device according to claim 1, characterized in that, The pressure chamber is connected to the gas path, which facilitates connection to an external compressed gas source.

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