Extraction equipment for preparing hexafluorobutadiene

Abstract

The invention discloses extraction equipment for hexafluorobutadiene preparation, and relates to the technical field of hexafluorobutadiene preparation. Comprising an extraction tank and a stirring rod, a floating ball is slidably mounted at the bottom end of the stirring rod, a driving shaft is rotatably mounted in a cavity in the bottom of the extraction tank, a cleaning ring is rotatably mounted in the extraction tank, a fixed scraper is mounted at the top of the cleaning ring, a movable scraper is slidably mounted on the side wall of the fixed scraper, and a rotating ring is rotatably mounted in the extraction tank; a rotating ring is installed in the extraction tank, a fixed seat is installed on the inner wall of the rotating ring, the fixed seat is in sliding connection with a movable scraping plate, a pushing assembly is arranged in the movable scraping plate, a limiting seat is installed in the extraction tank, and a closing assembly is arranged on the surface of the limiting seat. The position of the moving block is dynamically adjusted, the circulation caliber is gradually reduced, the problem that an operator manually closes the valve in time is avoided, the hidden danger of response delay is eliminated, and the stability of the separation process is improved.

Description

Technical Field

[0001] This invention relates to the field of hexafluorobutadiene preparation technology, specifically to an extraction device for hexafluorobutadiene preparation. Background Technology

[0002] In high-tech fields such as semiconductor manufacturing, hexafluorobutadiene, as an important fluorinated olefin, requires extremely high purity in its preparation process. The extraction process is a key step in achieving product separation and purification, directly affecting product quality. Traditional separation methods, such as distillation, are energy-intensive and have limited separation effects when processing mixtures of hexafluorobutadiene and other fluorides because the components have similar boiling points and relatively low volatility. In contrast, extraction, with its high selectivity for specific components, has become a more efficient purification method. In the extraction process for hexafluorobutadiene preparation, the extraction tank is currently the most commonly used equipment. To adapt to the special chemical properties of hexafluorobutadiene, modern extraction tanks are mostly made of corrosion-resistant Hastelloy or polytetrafluoroethylene to avoid chemical reactions between the equipment and the material, which could introduce new impurities.

[0003] In actual operation, the extraction tank first introduces a mixed raw material containing hexafluorobutadiene and an extractant in a specific ratio. A stirring device ensures full contact between the two phases, making hexafluorobutadiene more soluble in the extractant phase, thus achieving initial separation from other impurities. After settling, the phases separate using density differences, completing the initial purification before proceeding to the subsequent back-extraction process for further purification. However, in practical use, the discharge of the light and heavy phases relies on manual valve switching. Manual operation is prone to response delays and difficulty in quickly adapting to changes in operating conditions. If valve switching is not timely, the heavy phase may be carried along with the light phase during discharge, affecting the separation effect.

[0004] To address the aforementioned issues, innovative design based on existing methods is urgently needed. Summary of the Invention

[0005] The purpose of this invention is to provide an extraction device for the preparation of hexafluorobutadiene, so as to solve the problem mentioned in the background art that untimely valve switching may lead to the entrainment of light phase when heavy phase is discharged. The technical solution of this invention provides a solution that is significantly different from the existing technology, which is too simplistic.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an extraction device for preparing hexafluorobutadiene, comprising an extraction tank and a stirring rod, wherein a float ball is slidably installed at the bottom end of the stirring rod, a drive shaft is rotatably installed in the bottom cavity of the extraction tank, a first drive gear is fixed at the top of the drive shaft, a second drive gear is provided on the side wall of the drive shaft, a cleaning ring is rotatably installed inside the extraction tank, a transmission gear is fixed on the side wall of the cleaning ring, a fixed scraper is installed at the top of the cleaning ring, a movable scraper is slidably installed on the side wall of the fixed scraper, a rotating ring is rotatably installed inside the extraction tank, a fixed seat is installed on the inner wall of the rotating ring, the fixed seat is slidably connected to the movable scraper, a pushing component is provided inside the movable scraper, a limiting seat is installed inside the extraction tank, and a closing component is provided on the surface of the limiting seat; The closing assembly includes a limiting groove formed on the surface of the limiting seat, six sealing blocks slidably mounted on the surface of the limiting seat, a limiting block fixed at the bottom of the sealing block, a moving block mounted on the surface of the sealing block, and a rotating seat rotatably mounted inside the extraction tank. The rotating seat has a moving groove formed on its surface and transmission teeth provided on its side wall.

[0007] Preferably, the drive shaft is externally connected to a motor, and the first drive gear meshes with the transmission gear.

[0008] Preferably, the limiting block is slidably installed inside the limiting groove, and the limiting groove is designed to be inclined.

[0009] Preferably, the moving groove is designed to be inclined, and the end of the moving block is located inside the moving groove.

[0010] Preferably, the pushing assembly includes a second oil chamber fixed inside the movable scraper, a second piston rod slidably installed inside the second oil chamber, a telescopic linkage assembly inside the movable scraper, a pusher plate fixed to the end of the telescopic linkage assembly, a first oil chamber fixed inside the fixed base, a first piston rod slidably installed inside the first oil chamber, and a fixed ring rotatably installed inside the extraction tank.

[0011] Preferably, the first oil chamber and the second oil chamber are connected by a hose, and a return spring is provided inside the first oil chamber.

[0012] Preferably, the fixed scraper sidewall is provided with an electric push rod, the extended end of which is connected to the movable scraper, and the movable scraper sidewall is provided with a guide groove for the push plate to move, and the surface of the guide groove is provided with a movable sealing gasket.

[0013] Preferably, the extended end of the second piston rod is connected to the telescopic connecting rod assembly, the first piston rod has an L-shaped design, and the side wall of the rotating ring has a groove for the first piston rod to move.

[0014] Preferably, the bottom of the fixing ring is fixed with multiple sets of protrusions, and the side wall of the first piston rod is in close contact with the bottom of the fixing ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention, through the design of a float, drive shaft, second drive gear, limit seat, and closing assembly, senses the level of the heavy phase liquid in real time, dynamically adjusts the position of the moving blocks, and gradually narrows the flow diameter. This avoids the problem of operators not being able to close the valve in time, eliminates the hidden danger of response delay, and improves the stability of the separation process. The sensor captures the position signal of the float in real time, which drives the motor to rotate the drive shaft through the controller. Through the meshing of the first drive gear and the transmission teeth, the rotating seat is driven to rotate. With the coordinated cooperation of the limit groove, moving blocks, and moving groove, the positions of the six moving blocks are adjusted synchronously, achieving precise control of the flow diameter. This prevents the light phase from being entrained when the heavy phase is discharged, and improves the operating efficiency and separation accuracy of the extraction equipment.

[0016] This invention, through the arrangement of a drive shaft, a first drive gear, a cleaning ring, a fixed scraper, a moving scraper, a fixed seat, a rotating ring, and a pushing assembly, gradually narrows the flow opening while the scraper rotates to clean the bottom of the extraction tank, preventing heavy phase residue, ensuring the smooth flow of the discharge channel, reducing material waste, and lowering subsequent cleaning costs. Simultaneously, the first piston rod is squeezed by a protrusion fixed to the bottom of the fixed ring, which, through oil, pushes the second piston rod, causing the telescopic connecting rod assembly to move the pusher plate along the side wall of the moving scraper, further promoting the smooth discharge of the heavy phase deposited at the bottom of the extraction tank. This enhances the cleaning effect, ensures the thoroughness of heavy phase discharge, improves the continuity and stability of equipment operation, and provides a reliable discharge guarantee for high-precision extraction processes. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic cross-sectional view of the present invention; Figure 3 This is a partial cross-sectional view of the present invention; Figure 4 This is a schematic diagram of a partially disassembled structure of the present invention; Figure 5 This is a schematic diagram of the disassembled structure of the closure component of the present invention; Figure 6 This is a schematic diagram of the cleaning ring and drive shaft structure of the present invention; Figure 7 This is a schematic diagram of the sealing block of the present invention; Figure 8 This is a schematic diagram of the structure of the fixed scraper, the movable scraper, the fixed seat, and the rotating ring of the present invention; Figure 9This is a rear view schematic diagram of the fixed scraper, movable scraper, fixed seat and rotating ring of the present invention; Figure 10 This is a cross-sectional view of the movable scraper of the present invention; Figure 11 For the present invention Figure 10 Enlarged structural diagram at point A in the middle; Figure 12 This is a schematic diagram of the disassembled structure of the fixed scraper and the movable scraper of the present invention; Figure 13 This is a schematic diagram of the structure of the first oil chamber and the second oil chamber of the present invention.

[0018] In the diagram: 1. Extraction tank; 101. Stirring rod; 2. Float; 3. Drive shaft; 301. First drive gear; 302. Second drive gear; 4. Cleaning ring; 401. Transmission gear; 5. Limiting seat; 501. Limiting groove; 502. Sealing block; 503. Limiting block; 504. Moving block; 505. Rotating seat; 506. Moving groove; 507. Transmission teeth; 6. Fixed scraper; 601. Moving scraper; 602. Telescopic linkage assembly; 603. Push plate; 7. Fixed seat; 701. Rotating ring; 702. First oil chamber; 703. First piston rod; 704. Second oil chamber; 705. Second piston rod; 8. Fixed ring. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1-13This invention provides a technical solution: an extraction device for preparing hexafluorobutadiene, comprising an extraction tank 1 and a stirring rod 101. A float 2 is slidably mounted on the bottom end of the stirring rod 101, and the float 2 moves synchronously with the heavy phase liquid level, providing a real-time and accurate physical signal for liquid level monitoring. A drive shaft 3 is rotatably mounted in the bottom cavity of the extraction tank 1. A first drive gear 301 is fixed on the top of the drive shaft 3, and a second drive gear 302 is provided on the side wall of the drive shaft 3. A cleaning ring 4 is rotatably mounted inside the extraction tank 1. A transmission gear 401 is fixed on the side wall of the cleaning ring 4. A fixed scraper 6 is mounted on the top of the cleaning ring 4, and a movable scraper is slidably mounted on the side wall of the fixed scraper 6. 601, the cleaning ring 4 is driven by the meshing of the transmission gear 401 and the first drive gear 301, and rotates synchronously with the drive shaft 3, driving the fixed scraper 6 and the moving scraper 601 to scrape the bottom of the tank. A rotating ring 701 is rotatably installed inside the extraction tank 1. A fixed seat 7 is installed on the inner wall of the rotating ring 701. The fixed seat 7 is slidably connected to the moving scraper 601. A pushing component is set inside the moving scraper 601. The pushing component further enhances the cleaning effect, promotes the smooth discharge of the heavy phase deposited at the bottom of the extraction tank 1, reduces material residue and waste, and reduces subsequent cleaning costs. A limiting seat 5 is installed inside the extraction tank 1. A closing component is set on the surface of the limiting seat 5. The closing assembly includes a limiting groove 501 formed on the surface of the limiting seat 5, six sealing blocks 502 slidably mounted on the surface of the limiting seat 5, a limiting block 503 fixed at the bottom of the sealing block 502, a moving block 504 mounted on the surface of the sealing block 502, and a rotating seat 505 rotatably mounted inside the extraction tank 1. The rotating seat 505 has a moving groove 506 formed on its surface and transmission teeth 507 provided on its side wall. The limiting groove 501 and the limiting block 503 restrict the movement trajectory of the sealing block 502. The cooperation between the moving block 504 and the moving groove 506 converts the rotational motion of the rotating seat 505 into the linear movement of the sealing block 502, realizing the dynamic reduction of the heavy phase flow port diameter with the liquid level.

[0021] In one embodiment of the present invention, a motor is externally connected to the drive shaft 3, and the first drive gear 301 meshes with the transmission gear 401. The motor serves as a power source, providing stable driving force for the coordinated operation of the entire device. The first drive gear 301 and the transmission gear 401 on the side wall of the cleaning ring 4 form a stable mesh, efficiently transmitting the motor power to the cleaning ring 4, so that the cleaning ring 4 rotates synchronously with the drive shaft 3.

[0022] In one embodiment of the present invention, the limiting block 503 is slidably installed inside the limiting groove 501. The limiting groove 501 is designed to be inclined. The limiting groove 501 provides a guiding function for the movement of the sealing block 502, ensuring that the six sealing blocks 502 maintain synchronicity and consistency during the adjustment process.

[0023] In one embodiment of the present invention, the movable groove 506 is designed to be inclined, and the end of the movable block 504 is located inside the movable groove 506. When the rotating seat 505 rotates, the inclined movable groove 506 will generate a thrust on the movable block 504, causing the movable block 504 to drive the sealing block 502 to move along the movable groove 506. When the rotating seat 505 is driven to rotate, the movable block 504 slides along the movable groove 506, and at the same time the limiting block 503 moves along the inclined limiting groove 501. The two work together to constrain the movement direction of the sealing block 502, making the process of reducing the flow diameter more stable and uniform, and avoiding adjustment errors caused by the offset of a single sealing block 502.

[0024] In one embodiment of the present invention, the pushing assembly includes a second oil chamber 704 fixed inside the movable scraper 601, a second piston rod 705 slidably mounted inside the second oil chamber 704, a telescopic connecting rod assembly 602 disposed inside the movable scraper 601, a pusher plate 603 fixed to the end of the telescopic connecting rod assembly 602, a first oil chamber 702 fixed inside the fixed base 7, a first piston rod 703 slidably mounted inside the first oil chamber 702, and a fixing ring 8 rotatably mounted inside the extraction tank 1. The second oil chamber 704 fixed inside the movable scraper 601 and the slidably mounted second piston rod 705 constitute a power mechanism. In conjunction with the telescopic linkage 602 and the pusher plate 603, the oil pressure is converted into thrust. When the second piston rod 705 is driven by the oil, the telescopic linkage 602 extends accordingly, driving the pusher plate 603 to move along the side wall of the movable scraper 601, improving the thoroughness of discharge. The first oil chamber 702 inside the fixed seat 7 is combined with the first piston rod 703 and the fixed ring 8 fixed inside the extraction tank 1. When the fixed seat 7 rotates with the rotating ring 701 to below the fixed ring 8, the first piston rod 703 is alternately squeezed by the bottom protrusion of the fixed ring 8 and reciprocates under the action of the return spring, so that the oil in the first oil chamber 702 is continuously pumped into the second oil chamber 704 through the hose.

[0025] In one embodiment of the present invention, the first oil chamber 702 and the second oil chamber 704 are connected by a hose. A return spring is provided inside the first oil chamber 702. The first oil chamber 702 and the second oil chamber 704 are connected by a hose to form a closed oil transmission path, ensuring that pressure can be efficiently transmitted between the two chambers and achieving precise power transmission. The flexible connection of the hose ensures that the movement of the moving scraper 601 does not affect the connection between the two oil chambers.

[0026] In one embodiment of the present invention, an electric push rod is provided on the side wall of the fixed scraper 6. The extended end of the electric push rod is connected to the movable scraper 601. The side wall of the movable scraper 601 is provided with a guide groove for the push plate 603 to move. A movable sealing gasket is provided on the surface of the guide groove. The sensor senses the height of the float 2 in real time and drives the electric push rod through the controller to flexibly adjust the position of the movable scraper 601, ensuring the coverage range of the movable scraper 601 and adapting to the cleaning needs of heavy phases of different heights. The guide groove on the side wall of the movable scraper 601 provides a stable moving trajectory for the push plate 603, avoiding deviation during the pushing process. The movable sealing gasket on the surface of the guide groove effectively blocks heavy phase materials from entering the guide groove and prevents clogging of the groove caused by material residue.

[0027] In one embodiment of the present invention, the extended end of the second piston rod 705 is connected to the telescopic connecting rod assembly 602, and the first piston rod 703 is L-shaped. The side wall of the rotating ring 701 is provided with a sliding groove for the first piston rod 703 to move. The extended end of the second piston rod 705 is connected to the telescopic connecting rod assembly 602. Through the multi-segment telescopic structure of the telescopic connecting rod assembly 602, the linear thrust of the second piston rod 705 is converted into the smooth displacement of the push plate 603, amplifying the pushing stroke. The first piston rod 703 adopts an L-shaped design. Its transverse section can accurately align with the protrusion at the bottom of the fixing ring 8, and its longitudinal section is adapted to the installation direction of the first oil chamber 702, so that the squeezing force of the protrusion is efficiently converted into the linear motion of the piston rod, improving the energy conversion efficiency of the oil transmission.

[0028] In one embodiment of the present invention, multiple sets of protrusions are fixed to the bottom of the fixing ring 8, and the side wall of the first piston rod 703 is in close contact with the bottom of the fixing ring 8. When the fixing seat 7 rotates with the rotating ring 701, the side wall of the first piston rod 703, being in close contact with the bottom of the fixing ring 8, will continuously contact and separate from the protrusions, driving the first piston rod 703 to complete reciprocating motion in the first oil chamber 702. Through oil transmission, the pushing component is driven to move, enhancing the cleaning effect.

[0029] Working principle: When the extraction equipment for preparing hexafluorobutadiene completes the static stratification process and enters the heavy phase discharge stage, the heavy phase liquid level gradually decreases as the heavy phase is continuously discharged. The float 2, which is slidably installed at the bottom of the stirring rod 101, moves down synchronously with the heavy phase liquid level, providing real-time feedback on the liquid level change. The sensor continuously captures the position signal of the float 2 and transmits it to the controller. The controller drives the motor to rotate the drive shaft 3. During the rotation of the drive shaft 3, the second drive gear 302 fixed on its side wall meshes with the transmission teeth 507 on the outer wall of the rotating seat 505, driving the rotating seat 505 to rotate synchronously. Since the limiting block 503 is located inside the limiting groove 501 and the moving block 504 is located inside the moving groove 506, the six sealing blocks 502 will adjust their positions synchronously as the rotating seat 505 rotates, moving closer to each other along the limiting groove 501. This causes the diameter of the heavy phase flow hole to gradually decrease as the liquid level drops, avoiding the problem of light phase entrainment caused by manual response delay and improving the stability of the separation process. While the drive shaft 3 drives the sealing adjustment assembly, the first drive gear 301 fixed at the end of the drive shaft 3 rotates synchronously. Through meshing with the transmission gear 401, it drives the cleaning ring 4 to rotate synchronously at the bottom of the extraction tank 1. The fixed scraper 6 and the moving scraper 601 fixed at the top of the cleaning ring 4 rotate together to perform all-round scraping of the bottom of the extraction tank 1, preventing heavy phase from remaining at the bottom of the tank. At the same time, the sensor continuously captures the position signal of the float 2 and transmits it to the controller. The controller drives the electric push rod, and the moving scraper 601 is pushed and gradually moves down with the heavy phase, ensuring that the moving scraper 601 is in contact with the heavy phase liquid surface, so that a stable cleaning effect can be maintained even if the liquid level continues to change. During the rotation of the movable scraper 601, the fixed seat 7, which is slidably connected to the side wall of the movable scraper 601, rotates accordingly. Since the fixed seat 7 is fixedly connected to the rotating ring 701, the rotating ring 701 rotates with the fixed seat 7 inside the extraction tank 1, ensuring the sealing of the equipment. When the fixed seat 7 rotates to below the fixed ring 8 fixed inside the extraction tank 1, the first piston rod 703 set inside the fixed seat 7 is squeezed by multiple sets of protrusions set at the bottom of the fixed ring 8. Under the elastic action of the return spring, the first piston rod 703 continuously performs reciprocating linear motion. The oil is transferred from the first oil chamber 702 to the second oil chamber 704 through the hose, squeezing the second piston rod 705. The end of the second piston rod 705 is connected to the telescopic connecting rod assembly 602. The second piston rod 705 pushes the telescopic connecting rod assembly 602 connected to it to extend. The telescopic connecting rod assembly 602 pushes the pusher plate 603 to move along the side wall of the movable scraper 601, further promoting the smooth discharge of the heavy phase deposited at the bottom of the extraction tank 1, and enhancing the cleaning effect.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An extraction apparatus for preparing hexafluorobutadiene, comprising an extraction tank (1) and a stirring rod (101), characterized in that: A float ball (2) is slidably installed at the bottom end of the stirring rod (101). An active shaft (3) is rotatably installed in the bottom cavity of the extraction tank (1). A first drive gear (301) is fixed at the top of the active shaft (3). A second drive gear (302) is provided on the side wall of the active shaft (3). A cleaning ring (4) is rotatably installed inside the extraction tank (1). A transmission gear (401) is fixed on the side wall of the cleaning ring (4). A fixed scraper (6) is installed at the top of the cleaning ring (4). A movable scraper (601) is slidably installed on the side wall of the fixed scraper (6). A rotating ring (701) is rotatably installed inside the extraction tank (1). A fixed seat (7) is installed on the inner wall of the rotating ring (701). The fixed seat (7) is slidably connected to the movable scraper (601). A pushing component is provided inside the movable scraper (601). A limiting seat (5) is installed inside the extraction tank (1). A closing component is provided on the surface of the limiting seat (5). The closing assembly includes a limiting groove (501) formed on the surface of the limiting seat (5), six sealing blocks (502) are slidably mounted on the surface of the limiting seat (5), a limiting block (503) is fixed at the bottom of the sealing block (502), a moving block (504) is mounted on the surface of the sealing block (502), and a rotating seat (505) is rotatably mounted inside the extraction tank (1). A moving groove (506) is formed on the surface of the rotating seat (505), and transmission teeth (507) are provided on the side wall of the rotating seat (505).

2. The extraction apparatus for preparing hexafluorobutadiene according to claim 1, characterized in that: The drive shaft (3) is externally connected to a motor, and the first drive gear (301) meshes with the transmission gear (401).

3. The extraction apparatus for preparing hexafluorobutadiene according to claim 1, characterized in that: The limiting block (503) is slidably installed inside the limiting groove (501), which is designed to be inclined.

4. The extraction apparatus for preparing hexafluorobutadiene according to claim 1, characterized in that: The moving groove (506) is designed to be inclined, and the end of the moving block (504) is located inside the moving groove (506).

5. The extraction apparatus for preparing hexafluorobutadiene according to claim 1, characterized in that: The pushing assembly includes a second oil chamber (704) fixed inside the movable scraper (601), a second piston rod (705) slidably installed inside the second oil chamber (704), a telescopic linkage assembly (602) provided inside the movable scraper (601), a pusher plate (603) fixed at the end of the telescopic linkage assembly (602), a first oil chamber (702) fixed inside the fixed seat (7), a first piston rod (703) slidably installed inside the first oil chamber (702), and a fixed ring (8) rotatably installed inside the extraction tank (1).

6. The extraction apparatus for preparing hexafluorobutadiene according to claim 5, characterized in that: The first oil chamber (702) and the second oil chamber (704) are connected by a hose, and a reset spring is provided inside the first oil chamber (702).

7. The extraction apparatus for preparing hexafluorobutadiene according to claim 1, characterized in that: The fixed scraper (6) is provided with an electric push rod on its side wall. The extended end of the electric push rod is connected to the movable scraper (601). The movable scraper (601) is provided with a guide groove on its side wall for the push plate (603) to move. A movable sealing gasket is provided on the surface of the guide groove.

8. The extraction apparatus for preparing hexafluorobutadiene according to claim 5, characterized in that: The extended end of the second piston rod (705) is connected to the telescopic connecting rod assembly (602), the first piston rod (703) is L-shaped, and the side wall of the rotating ring (701) is provided with a sliding groove for the first piston rod (703) to move.

9. The extraction apparatus for preparing hexafluorobutadiene according to claim 5, characterized in that: The bottom of the fixing ring (8) is fixed with multiple sets of protrusions, and the side wall of the first piston rod (703) is in close contact with the bottom of the fixing ring (8).

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