Magnetic stirring device for fluorination reaction

Abstract

The utility model provides a magnetic stirring device for fluorination reaction, which is characterized in that an outer magnetic ring seat of a magnetic coupling unit is connected with an output end of a driving unit, the outer magnetic ring seat is fixedly connected with an outer magnetic cylinder, inner magnetic steel is fixedly connected with a transmission shaft, the transmission shaft is in transmission connection with a stirring shaft, and a sealing cover is arranged between the outer magnetic cylinder and the inner magnetic cylinder. Due to the non-contact torque transmission of the magnetic coupling unit, a power output part and a power input part can be completely isolated, a dynamic sealing structure of a stirrer in traditional mechanical transmission connection is fundamentally canceled, the air tightness and the pressure resistance are enhanced by installing the sealing cover, the interior of the kettle is in a totally closed state, and the service life of the kettle is prolonged. The effect of sealing and no leakage in the stirring reaction process is achieved, and the risk of leakage caused by insufficient sealing performance of the stirring device in the fluorination reaction process is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fine chemical equipment field especially relates to fluorination reaction magnetic stirring device. BACKGROUND

[0002] The fluorination reactor is the core equipment of liquid phase fluorination reaction, which is used for fluorination reaction under the control condition, that is, introducing fluorine atom into the compound molecule. Since the fluorination reaction is usually a strong exothermic reaction, the reactor needs to effectively control the reaction heat to prevent over-temperature, over-pressure and equipment explosion accident. The fluorination reactor is usually composed of a cylinder, a head, a jacket, inlet and outlet pipes, a liquid level meter, a thermometer, a pressure gauge and other related accessories. In order to improve the mass transfer efficiency, some reactors are also provided with a stirring device.

[0003] In the fluorination reaction process, the pressure and temperature in the reactor are high. In order to avoid the leakage of dangerous medium in the reactor, the pressure resistance and air tightness of the stirring device are very important. The traditional stirring generally adopts mechanical seal to seal the dangerous medium in the reactor. For example, the fluorination reactor of the fluorination reaction magnetic stirring device disclosed in patent No. CN220657463U comprises a reactor body, a sealing cover is arranged on the top of the reactor body, a stirring mechanism is arranged on the sealing cover, the reactor body is composed of an outer shell and an inner shell, the inner shell is arranged on the inner side of the outer shell, a vacuum cavity is arranged between the inner shell and the outer shell, a plurality of U-shaped pipes are arranged at the position close to the bottom of the vacuum cavity, a one-way valve is arranged on the inner wall of the inner shell, the one-way valve is connected with the U-shaped pipes, a discharge port is arranged at the bottom of the reactor body, the stirring mechanism is composed of a stirring motor, a stirring shaft and a stirring frame, the output end of the stirring motor is connected with the stirring shaft, and the stirring frame is arranged on the stirring shaft. The reactor body is provided with a double-layer structure.

[0004] The existing stirring structure for the reactor, the power input part and the power output part of the motor need to be connected by transmission, which cannot be completely isolated. In actual use, the sealing structure used is easy to be worn and corroded, which leads to insufficient air tightness and decreased high-pressure resistance, causing leakage of dangerous gas in the reactor and making it difficult to effectively control the reaction heat, thereby increasing the risk of over-temperature and over-pressure and causing equipment explosion accident. UTILITY MODEL CONTENTS

[0005] Therefore, it is necessary to provide a fluorination reaction magnetic stirring device to solve the problem that the existing reactor with stirring structure is easy to be worn and corroded in actual use, which leads to insufficient air tightness and decreased high-pressure resistance, causing leakage of dangerous gas in the reactor and making it difficult to effectively control the reaction heat, thereby increasing the risk of over-temperature and over-pressure and causing equipment explosion accident.

[0006] In order to achieve the above object, the utility model provides fluorinated reaction magnetic stirring device, including:

[0007] Driving unit for providing driving force;

[0008] Magnetic coupling unit, the magnetic coupling unit includes the casing and the outer magnetic ring seat, the outer magnetic cylinder and the inner magnetic cylinder that are sequentially coaxially covered in the casing inside, the upper end of the casing is fixed with the lower end of the driving unit and is closed connection, the output end of the driving unit is transmission connection with the outer magnetic ring seat, the outer magnetic cylinder is fixedly arranged on the lower inner wall surface of the outer magnetic ring seat, the transmission shaft is fixedly connected with the inner magnetic cylinder, still including the seal cover, the upper end of the seal cover is closed and covered outside the inner magnetic cylinder, the lower end of the seal cover extends to the bottom of the casing and is fixedly and closedly connected with the casing inner wall, the inner magnetic cylinder in the seal cover, transmission shaft and the outer magnetic cylinder, the outer magnetic ring seat of outside are completely isolated;

[0009] Reaction kettle, the magnetic coupling unit is arranged on the upper surface of the reaction kettle, the transmission shaft is transmission connection with the transmission shaft in the reaction kettle and enters the reaction kettle, and the lower part of the transmission shaft is provided with a stirrer;

[0010] Balancer, the connecting pipeline of the balancer passes through the casing and enters the reaction kettle, for balancing the pressure inside the reaction kettle.

[0011] Further, the driving unit includes a motor and a speed reducer, the output end of the motor is transmission connection with the input end of the speed reducer, and the output end of the speed reducer is transmission connection with the outer magnetic ring seat.

[0012] Further, the seal cover includes an upper gland and a side cylinder, the upper gland is provided with an upper pressing through hole and an upper pressing groove, the upper end of the side cylinder is provided with a sealing hole, an elastic sealing ring is arranged in the upper pressing groove, the upper gland and the side cylinder are fixedly connected by fasteners from top to bottom through the upper pressing through hole into the sealing hole, and the elastic sealing ring is located between the upper gland and the side cylinder.

[0013] Further, the bottom of the casing extends outward along the radial direction and has a first fixing part, the bottom end of the side cylinder extends outward along the radial direction and has a second fixing part, the first fixing part and the second fixing part are respectively provided with connecting holes, and the first fixing part and the second fixing part are fixedly connected by fasteners from top to bottom through the connecting holes of the first fixing part and the connecting holes of the second fixing part.

[0014] Further, the upper surface of the second fixing part is provided with a second groove, and an elastic sealing ring is arranged in the groove.

[0015] Further, the third fixing part is provided on the reactor, and a third groove is provided on the upper surface of the third fixing part, and an elastic sealing ring is provided in the third groove, when the shell is fixedly connected with the reactor, the bottom end of the sealing cover is pressed against the upper surface of the third fixing part and presses the elastic sealing ring in the third groove.

[0016] Further, the lower part of the transmission shaft is provided with a mechanical seal, and a closed space is formed between the mechanical seal and the sealing cover.

[0017] Further, the third fixing part is provided on the reactor, and a third groove is provided on the upper surface of the third fixing part, and an elastic sealing ring is provided in the third groove, when the shell is fixedly connected with the reactor, the bottom end of the sealing cover is pressed against the upper surface of the third fixing part and presses the elastic sealing ring in the third groove.

[0018] Different from the prior art, the technical scheme has the following beneficial effects: the outer magnetic ring seat of the magnetic coupling unit is connected with the output end of the driving unit, the outer magnetic cylinder is fixedly connected with the outer magnetic ring seat, the inner magnetic steel is fixedly connected with the transmission shaft, the transmission shaft is in transmission connection with the stirring shaft, and the sealing cover is arranged between the outer magnetic cylinder and the inner magnetic cylinder. Since the magnetic coupling unit transmits torque without contact, the power output part and the power input part can be completely isolated, the dynamic sealing structure of the traditional mechanical transmission connection stirring device is fundamentally cancelled, the air tightness and pressure resistance are enhanced by installing the sealing cover, the inside of the reactor is in a fully closed state, the effect of closed and no leakage during the stirring and reaction process is achieved, and the risk of leakage due to insufficient sealing of the stirring device during the fluorination reaction process is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The structure of the fluorination reaction magnetic stirring device is described in the specific embodiment.

[0020] Figure 2 The partial enlarged view A of Figure 1

[0021] Figure 3 The partial enlarged view B of Figure 1

[0022] Figure 4 The partial enlarged view C of Figure 1

[0023] Figure 5 The partial enlarged view D of Figure 1

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] ​​​​10, drive unit; 101, motor; 102, speed reducer; 20, magnetic coupling unit; 201, housing; 2011, first fixing part; 202, outer magnetic ring seat; 203, outer magnetic cylinder; 204, inner magnetic cylinder; 205, transmission shaft; 30, sealing cover; 301, upper pressing cover; 3011, upper pressing through hole; 3012, upper pressing groove; 51, stirring shaft; 302, side cylinder; 3021, sealing hole; 303, second fixing part; 304, second groove; 40, balancer; 401, connecting pipeline; 41, elastic sealing ring; 42, connecting hole; 501, third fixing part; 5011, balancing pipeline; 5012, balancing cavity; 502, third groove; 60, mechanical seal. DETAILED DESCRIPTION

[0026] To describe the technical contents, structural features, purposes and effects of the technical solutions in detail, the following will be described in combination with specific embodiments and with reference to the drawings.

[0027] In this document, the term “embodiment” means that the specific features, structures or characteristics described in combination with the embodiments can be included in at least one embodiment of the present application. The term “embodiment” appearing in various places in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0028] Unless otherwise defined, the meanings of the technical terms used in this document are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms in this document is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0029] In the description of the present application, the phrase “and / or” is used to describe the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character “ / ” in this document generally represents that the associated objects before and after are a kind of “or” logical relationship.

[0030] In this application, such as “first” and “second”, the terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary or order relationship between the entities or operations.

[0031] In the present application, the terms "comprise", "contain", "include", or other similar phrases as used in a clause means to encompass the non-exclusive inclusion, and the terms do not exclude the presence of additional elements in the process, method, or product comprising the stated elements, so that the process, method, or product comprising a series of elements can not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method, or product.

[0032] In the present application, the terms "greater than", "less than", "exceed", and the like are understood as not including the number; the terms "above", "below", "within", and the like are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times", and the like, unless otherwise explicitly specified.

[0033] In the description of the embodiments of the present application, the spatial-related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or the drawings, and are only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and do not indicate or imply that the indicated device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0034] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mount", "connect", "connect", "fix", "set", and the like should be understood broadly. For example, the "connection" can be a fixed connection, or a detachable connection, or an integral setting; it can be a mechanical connection, or an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0035] Please refer to Figures 1 to 5 The present embodiment provides a fluorination reaction magnetic stirring device, comprising:

[0036] The driving unit 10 is used to provide driving force, specifically, the driving unit 10 can provide rotary driving force, that is, the outer magnetic ring seat 202 is driven to rotate by the driving unit 10. The driving unit 10 can adopt a permanent magnet DC motor 101, a variable frequency motor 101 and devices with the same function. Preferably, the driving unit 10 includes a motor 101 and a speed reducer 102, the output end of the motor 101 is drivingly connected with the input end of the speed reducer 102, and the output end of the speed reducer 102 is drivingly connected with the outer magnetic ring seat 202. In some reactions, a lower rotating speed and a larger torque are required to drive the stirrer, and a motor 101 alone often cannot provide such a combination of rotating speed and torque, so a speed reducer 102 is required to adjust. By matching the motor 101 with the speed reducer 102, the torque of the stirring shaft can be increased to be suitable for more reaction scenarios. The driving process adjusted by the speed reducer 102 starts from the motor 101, which serves as a power source to generate torque by electromagnetic induction to drive the motor 101 to rotate. The core components of the motor 101 are the stator and the rotor, the stator generates a magnetic field, the rotor generates induced current under the action of the magnetic field, the current interacts with the magnetic field to generate torque, thereby driving the rotor to rotate, converting electrical energy into mechanical energy. Then, the high-speed rotation of the motor 101 is transmitted to the speed reducer 102 through the input shaft of the speed reducer 102, the speed reducer 102 is internally composed of a series of gears, the gears are meshed and driven in different sizes to reduce the output rotating speed and increase the output torque, finally, the output shaft of the speed reducer 102 rotates at a lower speed but has a larger torque, this low-speed high-torque output is transmitted to the outer magnetic ring seat 202 to drive it to rotate.

[0037] Magnetic coupling unit 20, the magnetic coupling unit 20 includes shell 201 and sequentially inward coaxially sleeved in the inside of shell 201 outer magnetic ring seat 202, outer magnetic cylinder 203 and inner magnetic cylinder 204;The upper end of the shell 201 is fixed and closed with the lower end of the drive unit 10 Connection;The outer magnetic ring seat 202 is drivingly connected with the output end of the drive unit 10, the outer magnetic cylinder 203 is fixedly arranged on the lower inner wall surface of the outer magnetic ring seat 202;The inner magnetic cylinder 204 is fixedly connected with transmission shaft 205;Still include sealing cover 30, the upper end of the sealing cover 30 is closed and sleeved outside the inner magnetic cylinder 204, the lower end of the sealing cover 30 extends to the bottom of the shell 201 and is fixedly and closedly connected with the inner wall of the shell 201, the inner magnetic cylinder 204, transmission shaft 205 in the inside of the sealing cover 30 and the outer outer magnetic cylinder 203, outer magnetic ring seat 202 are completely isolated. Working principle: mainly based on magnetic coupling effect, it provides power through motor 101, converts the rotary motion of motor 101 into magnetic field rotation, the outer magnetic cylinder 203 and the inner magnetic cylinder 204 are made of permanent magnetic material, when the motor 101 drives the outer magnetic cylinder 203 to rotate through the outer magnetic ring seat 202, the magnetic field generated by the outer magnetic cylinder 203 acts on the inner magnetic cylinder 204, so that it follows the rotation, the inner magnetic cylinder 204 drives the stirring shaft 51 to rotate through the transmission shaft 205, so as to realize the stirring effect.

[0038] The sealing cover 30 can adopt stainless steel material, the thickness thereof can be adjusted according to working pressure and working temperature, the sealing cover 30 can be designed in an integrated manner with the bearing seat in the shell 201, so as to improve the magnetic transmission efficiency and reduce the heat generation, and also can make the thin-walled sealing cover 30 under pressure free from the influence of stirring vibration force, improve the safety. In another embodiment, in order to facilitate assembly, the sealing cover 30 includes upper pressing cover 301 and side cylinder 302, the upper pressing cover 301 is provided with upper pressing through hole 3011 and upper pressing groove 3012, the upper end of the side cylinder 302 is provided with sealing hole 3021, the upper pressing groove 3012 is provided with elastic sealing ring 41, the upper pressing cover 301 and the side cylinder 302 are fixedly connected by fasteners from top to bottom through the upper pressing through hole 3011 into the sealing hole 3021, and the elastic sealing ring 41 is located between the upper pressing cover 301 and the side cylinder 302. The elastic sealing ring 41 can adopt polytetrafluoroethylene, which has very high corrosion resistance, is almost not eroded by all chemical substances, can be used for a long time in the temperature range of-200 DEG C to 260 DEG C, and has low friction coefficient and good self-lubricity;Or adopt fluorine rubber, which has excellent high temperature resistance and chemical resistance, and has excellent resistance to most chemicals, oils and solvents.

[0039] The material that the shell 201 can adopt includes stainless steel, titanium and other precious non-ferrous metals, and alloy materials of these metals, further, high-performance non-metal corrosion-resistant materials such as Teflon and Teflon can be sprayed on the inside of the shell 201, to improve the corrosion resistance of the shell 201 and prolong the service life. The lower end of the shell 201 can be fixedly connected with the reaction kettle, and the sealing surface inside the shell 201 is flange-connected with the tank opening of the reaction kettle, to realize high sealing and ensure the stability of the pressure in the reaction kettle.

[0040] The reaction kettle, the magnetic coupling unit 20 is arranged on the upper surface of the reaction kettle, the transmission shaft 205 extends into the reaction kettle and is in transmission connection with the transmission shaft 205 inside the reaction kettle, and the lower part of the transmission shaft 205 is provided with a stirrer. The stirrer is provided with a stirring blade structure, and the stirring blade structure is driven to rotate by the magnetic coupling unit 20 to drive the transmission shaft 205 to realize the function of stirring the materials in the reaction kettle. The kettle body of the reaction kettle can be made of carbon steel, nickel and nickel-based alloy, stainless steel, polytetrafluoroethylene, enamel glass and the like, which can be selected according to the actual reaction conditions and the corrosion of the medium. The reaction kettle is used for fluorination reaction, and can further include a temperature control unit including a heater, a heating medium and a heat transfer pipeline, etc., for controlling the temperature of the reaction process; and can further include an inlet and outlet unit including a feeding pipeline, a feeding valve, a feeding pump and a discharge pipeline, a discharge valve and a discharge pump, etc., for inputting reaction materials and discharging reaction products or waste materials.

[0041] The balance device 40 is connected to the inside of the reactor through a connecting pipe 401 of the balance device 40, and is used to balance the pressure inside the reactor. The balance device 40 includes a balance tank with a variable volume piston or spring inside, and a connecting pipe for connecting with the sealing part of the reactor and the magnetic coupling unit 20. The working principle of the gas is based on the Le Chatelier pressure principle, that is, in a gas phase reaction that reaches equilibrium at a certain temperature, when the concentration of the reactants changes, the equilibrium state will be adjusted to maintain the stability of the concentration of the reactants. Specifically, when the fluorination reaction is carried out, the change of the pressure in the reactor will cause the reactants to be converted into products. The balance device 40 adjusts the partial pressure of the reactants by changing the internal volume, thereby maintaining the balance between the reactants and the products. When it is necessary to increase the yield of the products, the partial pressure of the reactants can be increased by reducing the internal volume of the balance tank, thereby promoting the reaction to the product direction; on the contrary, if it is necessary to reduce the yield of the products, the partial pressure of the reactants can be reduced by increasing the internal volume of the balance tank, thereby promoting the reaction to the reactant direction. In addition, the balance device 40 can also automatically supplement the sealant to ensure that the sealant in the mechanical seal is always full. As the sealant in the seal tank decreases, the piston will automatically rise, and when the piston flag rises to a certain height, the sealant can be manually supplemented, and the air release bolt is loosened, and after the supplement of the sealant is completed, the oil injection and air release bolts are tightened to maintain the normal operation of the mechanical seal. By adjusting the pressure in the reactor through the balance device 40, the control accuracy of the reaction is improved, and the safety and reliability of the system are also enhanced.

[0042] The novel type is connected by connecting the outer magnetic ring seat 202 of the magnetic coupling unit 20 with the output end of the driving unit 10, the outer magnetic cylinder 203 is fixedly connected with the outer magnetic ring seat 202, the inner magnetic steel is fixedly connected with the transmission shaft 205, the transmission shaft 205 is in transmission connection with the stirring shaft, and the sealing cover 30 is arranged between the outer magnetic cylinder 203 and the inner magnetic cylinder 204. Since the magnetic coupling unit 20 transmits torque without contact, it can completely isolate the power output part and the power input part, and fundamentally cancels the dynamic sealing structure of the traditional mechanical transmission connection stirrer. By installing the sealing cover 30, the air tightness and pressure resistance are enhanced, the inside of the reactor is in a fully closed state, the effect of closed and no leakage in the stirring reaction process is achieved, and the risk of leakage due to insufficient sealing of the stirring device in the fluorination reaction process is greatly reduced.

[0043] In some embodiments, the bottom of the shell 201 extends radially outwardly with a first fixing portion 2011, the bottom end of the side cylinder 302 extends radially outwardly with a second fixing portion 303, the first fixing portion 2011 and the second fixing portion 303 are respectively provided with a connecting hole 42, and the fixed connection is achieved by fastening the connecting hole 42 of the first fixing portion 2011 and the connecting hole 42 of the second fixing portion 303 from top to bottom once. The first fixing portion 2011 is a reverse L-shaped structure, and the second fixing portion 303 can be fitted into the inner corner of the first fixing portion 2011, thereby improving the sealing performance.

[0044] In some embodiments, the upper surface of the second fixing portion 303 is provided with a second groove 304, and the groove is provided with an elastic sealing ring 41. The upper part of the elastic sealing ring 41 is extruded by the first fixing portion 2011, and the lower part of the elastic sealing ring 41 is extruded by the first fixing portion 2011, thereby further improving the sealing performance.

[0045] In some embodiments, a third fixing portion 501 is arranged on the reactor, the upper surface of the third fixing portion 501 is provided with a third groove 502, and the groove is provided with an elastic sealing ring 41. When the shell 201 is fixedly connected with the reactor, the bottom end of the sealing cover 30 is pressed against the upper part of the third fixing portion 501 and presses the elastic sealing ring 41 in the third groove 502, thereby further improving the sealing performance. Further, the third fixing portion 501 is further provided with a balance pipeline 5011 and a balance cavity 5012, one end of the balance pipeline communicates with the balance cavity, and the other end of the balance pipeline is connected with the connecting pipeline of the balancer 40.

[0046] In some embodiments, the lower part of the transmission shaft 205 is provided with a mechanical seal 60, and a closed space is formed between the mechanical seal 60 and the sealing cover 30. The mechanical seal 60 includes an end face sealing friction pair, an elastic element, an auxiliary sealing ring, and a transmission mechanism. The end face sealing friction pair is composed of a static ring and a dynamic ring, which are the core parts of the mechanical seal and are responsible for the main sealing function. The dynamic ring rotates with the pump shaft, while the static ring is fixed in the gland. The contact end faces of the two always adhere to each other in motion to achieve sealing. The elastic element is a spring or a bellows, or a combination of a bellows and a spring component, which mainly plays the role of pre-tightening, compensation and buffering. It is used to provide sufficient elastic force to overcome the friction of the auxiliary sealing and the transmission member, as well as the inertia of the dynamic ring, to ensure good adhesion of the end face sealing pair and the followability of the dynamic ring. The auxiliary sealing ring plays an auxiliary sealing role, and O-rings, V-rings, etc. are usually used, which are used for sealing between the dynamic ring and the shaft (or shaft sleeve) and between the static ring and the gland, respectively. The transmission mechanism includes a transmission seat and a key or a fixing pin, which ensures that the dynamic ring can rotate with the shaft. The working principle of the mechanical seal 60 is to rely on the elastic force provided by the elastic element to overcome the friction force between the auxiliary sealing ring and the shaft, so that the compensation ring tightly adheres to the end face of the non-compensation ring, forming the initial closing force of the sealing surface. When the main machine is full of pressure medium and starts to work, the sealing end face can generate closing force, so that the sealing surface can achieve reasonable specific pressure, and the fluid sealing can be realized. During operation, a very thin liquid film is formed between the end faces of the dynamic ring and the static ring. This layer of liquid film has fluid dynamic pressure and static pressure, which plays the role of lubrication and pressure balance, and at the same time produces a long-term sealing effect.

[0047] It should be noted that although the above embodiments have been described in this paper, the patent protection scope of the utility model is not limited thereby. Therefore, based on the innovative concept of the utility model, the changes and modifications of the embodiments described in this paper, or the equivalent structure or equivalent process transformation made by using the contents of the utility model specification and drawings, directly or indirectly apply the above technical solutions to other related technical fields, are all included in the protection scope of the utility model patent.

Claims

1. A fluorination reaction magnetic stirring device, characterized by, include: The drive unit is used to provide driving force; A magnetic coupling unit includes a housing and an outer magnetic ring seat, an outer magnetic cylinder, and an inner magnetic cylinder sequentially and coaxially sleeved inside the housing. The upper end of the housing is fixedly and sealed to the lower end of the drive unit. The outer magnetic ring seat is drivenly connected to the output end of the drive unit. The outer magnetic cylinder is fixedly disposed on the lower inner wall surface of the outer magnetic ring seat. The inner magnetic cylinder is fixedly connected to a drive shaft. The unit also includes a sealing cover, the upper end of which is sealed and sleeved outside the inner magnetic cylinder. The lower end of the sealing cover extends to the bottom of the housing and is fixedly and sealed to the inner wall of the housing. The inner magnetic cylinder and drive shaft inside the sealing cover are completely isolated from the outer magnetic cylinder and outer magnetic ring seat outside. The reaction vessel has a magnetic coupling unit located on top of it. The drive shaft extends into the reaction vessel and is connected to a drive shaft inside the reaction vessel. A stirrer is located at the bottom of the drive shaft. A balancer, the connecting pipe of which passes through the shell and enters the reactor, is used to balance the internal pressure of the reactor.

2. The fluorination reaction magnetic stirring apparatus according to claim 1, characterized by: The drive unit includes a motor and a reducer. The output end of the motor is connected to the input end of the reducer, and the output end of the reducer is connected to the outer magnetic ring seat.

3. The fluorination reaction magnetic stirring apparatus according to claim 1, wherein: The sealing cover includes an upper pressure cover and a side cylinder. The upper pressure cover has an upper pressure through hole and an upper pressure groove. The upper end of the side cylinder has a sealing hole. An elastic sealing ring is provided in the upper pressure groove. The upper pressure cover and the side cylinder are fixedly connected by fasteners passing through the upper pressure through hole from top to bottom and entering the sealing hole. The elastic sealing ring is located between the upper pressure cover and the side cylinder.

4. The fluorination reaction magnetic stirring apparatus according to claim 3, characterized by: The bottom of the housing has a first fixing part extending radially outward, and the bottom end of the side cylinder has a second fixing part extending radially outward. The first fixing part and the second fixing part are respectively provided with connecting holes. A fixed connection is achieved by fasteners passing through the connecting holes of the first fixing part and the second fixing part from top to bottom.

5. The fluorination reaction magnetic stirring apparatus according to claim 4, wherein: The upper surface of the second fixing part is provided with a second groove, and an elastic sealing ring is provided in the groove.

6. The fluorination reaction magnetic stirring apparatus according to claim 5, wherein: The reactor is provided with a third fixing part, and the upper surface of the third fixing part is provided with a third groove. An elastic sealing ring is provided in the groove. When the shell is fixedly connected to the reactor, the bottom end of the sealing cover presses against the top of the third fixing part and presses against the elastic sealing ring in the third groove.

7. The fluorination reaction magnetic stirring apparatus according to claim 6, wherein: The lower part of the drive shaft is equipped with a mechanical seal, which forms a sealed space with the sealing cover.

8. The fluorination reaction magnetic stirring apparatus according to claim 6, wherein: The third fixing part is also provided with a balancing pipe and a balancing cavity. One end of the balancing pipe is connected to the balancing cavity, and the other end is connected to the connecting pipe of the balancer.

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