Magnetic drive stirring structure suitable for small high-temperature and high-pressure container

Abstract

The utility model relates to a magnetically-driven stirring structure suitable for a small-sized high-temperature and high-pressure container. Comprising a container, a first nut in threaded connection with the bottom of the container, a spacer bush arranged on the first nut, a rotating shaft rotating in the spacer bush, a driven magnetic ring driving the rotating shaft to rotate, a driving magnetic ring driving the driven magnetic ring to rotate, a third plug sealing the spacer bush and a second nut limiting the position of the third plug. The second nut is in threaded connection with the spacer bush; the spacer bush is detachably connected to the container through a first nut; the driving magnetic ring is arranged on the outer side of the spacer bush; the driven magnetic ring is arranged on the inner side of the spacer bush; the driven magnetic ring is connected with the rotating shaft. The problems that when the pressure needing to be sealed is continuously increased, the rotating resistance of a shaft is continuously increased, the shaft rotates for a long time in a large-friction-force environment, friction damage is caused to the surface of the shaft by 100%, material denaturation is caused by sealing filler due to friction heat, the sealing effect is continuously reduced or fails, and excessive waste is caused in the aspects of economy and energy conservation are solved.

Description

Technical Field

[0001] The utility model relates to the field of high-temperature and high-pressure vessels, in particular to a magnetic drive stirring structure applicable to small high-temperature and high-pressure vessels. Background Art

[0002] In the prior art, most small high-temperature and high-pressure vessels are usually equipped with moving parts inside, while the power device is usually installed outside the vessel. For example, high-pressure autoclaves in experimental equipment usually require internal stirring. The conventional transmission device is a transmission shaft extending from the outside to the inside of the vessel, and the external motor drives the shaft to rotate. At this time, the rotating shaft and the high-pressure vessel are in dynamic sealing, and its sealing ability is poor and the pressure resistance is low. The structural schematic diagram is as Figure 1 shown:

[0003] As Figure 1 shown, the dynamic sealing rotating structure is relatively simple, mainly composed of a rotating shaft, a sealing cavity and sealing packing. The number of parts is small and the installation and operation are convenient. The sealing between the rotating shaft and the packing is achieved by force extrusion, so there is sliding friction between the rotating shaft and the sealing packing. The high-speed operation of the rotating shaft for a long time will cause the frictional heat between the rotating shaft and the sealing packing to increase sharply. Since the packing used for sealing can only be non-metallic, common non-metallic packings include polytetrafluoroethylene, rubber, graphite, etc. Except for graphite, the heat-resistant temperatures of polytetrafluoroethylene and rubber materials are limited and will soon fail due to excessive temperature. When the pressure to be sealed continues to increase, the extrusion force between the transmission shaft and the sealing packing will also continue to increase, which will cause the rotational resistance of the shaft to increase continuously. Compared with the parameter selection of the motor, it will also increase. And rotating in an environment of large friction for a long time will definitely cause frictional damage to the surface of the shaft, and the sealing packing will also be denatured due to frictional heat, resulting in continuous reduction or failure of the sealing effect, which is too wasteful in terms of economic energy conservation. Summary of the Utility Model

[0004] By providing a magnetic drive stirring structure applicable to small high-temperature and high-pressure vessels in the embodiments of the present application, the problems in the prior art are solved that the packing used for sealing can only be non-metallic, common non-metallic packings include polytetrafluoroethylene, rubber, graphite, etc. Except for graphite, the heat-resistant temperatures of polytetrafluoroethylene and rubber materials are limited and will soon fail due to excessive temperature. When the pressure to be sealed continues to increase, the extrusion force between the transmission shaft and the sealing packing will also continue to increase, which will cause the rotational resistance of the shaft to increase continuously. Compared with the parameter selection of the motor, it will also increase. And rotating in an environment of large friction for a long time will definitely cause frictional damage to the surface of the shaft, and the sealing packing will also be denatured due to frictional heat, resulting in continuous reduction or failure of the sealing effect, which is too wasteful in terms of economic energy conservation.

[0005] The technical solutions adopted in the embodiments of the present application are as follows.

[0006] A magnetic drive stirring structure applicable to small high-temperature and high-pressure containers, comprising a container, a first nut threadedly connected to the bottom of the container, a spacer sleeve disposed on the first nut, a rotating shaft rotatably disposed within the spacer sleeve, a driven magnetic ring driving the rotating shaft to rotate, a driving magnetic ring driving the driven magnetic ring to rotate, a third plug for sealing the spacer sleeve, and a second nut for restricting the position of the third plug; the second nut is threadedly connected to the spacer sleeve; the spacer sleeve is detachably connected to the container through the first nut; the driving magnetic ring is disposed outside the spacer sleeve; the driven magnetic ring is disposed inside the spacer sleeve; the driven magnetic ring is connected to the rotating shaft.

[0007] As a further improvement of the above technical solution: a single-stage magnetic block is disposed on the driven magnetic ring; a sensor is disposed outside the spacer sleeve corresponding to the single-stage magnetic block; the sensor detects the rotation speed and whether the driven magnetic ring rotates.

[0008] As a further improvement of the above technical solution: a first bearing assembly is disposed inside the container; the rotating shaft is connected to a bearing within the first bearing assembly.

[0009] As a further improvement of the above technical solution: a cooling member is disposed on the spacer sleeve; a cavity is left between the cooling member and the spacer sleeve; pipes are disposed at both ends of the cooling member; the pipes circulate and inject a coolant into the cavity between the cooling member and the spacer sleeve.

[0010] As a further improvement of the above technical solution: the driving magnetic ring includes a magnetic ring sleeve, a snap ring, a first rotating member disposed within the magnetic ring sleeve, a first magnetic ring disposed on the first rotating member, gaskets disposed at both ends of the first magnetic ring, and a first plug for restricting the position of the first rotating member; there are two sets of the first rotating members disposed oppositely; the gaskets are disposed on the first rotating members; the first magnetic ring is disposed between the two sets of gaskets; the first plug is threadedly connected to one end of the magnetic ring sleeve and presses one set of the first rotating members; the snap ring is disposed at the end of the magnetic ring sleeve away from the first plug.

[0011] As a further improvement of the above technical solution: the driven magnetic ring includes a protection tube, a second magnetic ring rotatably disposed within the protection tube, a magnetic ring core shaft disposed within the second magnetic ring, second plugs disposed at both ends of the second magnetic ring, and second rotating members disposed on the second plugs; the second plugs are disposed at both ends of the magnetic ring core shaft; the second magnetic ring rotates within the protection tube through the second rotating members.

[0012] As a further improvement of the above technical solution: an O-ring is disposed on the third plug.

[0013] As a further improvement of the above technical solution: A plurality of second bearing assemblies for restricting the concentricity of the rotating shaft are arranged inside the spacer sleeve; A spacer sleeve for axial positioning is arranged inside the spacer sleeve.

[0014] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0015] 1. Since a static seal is achieved between the right side of the spacer sleeve and the container through a second nut, and the second plug is pressed by the second nut on the left side, and a static seal is achieved between the second plug and the spacer sleeve through an O-ring, the sealing function of the overall structure is realized. The active magnetic ring is sleeved outside the spacer sleeve, and coaxial installation is ensured through the first rotating part, and axial positioning is ensured through a circlip. The driven magnetic ring is installed inside the spacer sleeve, and coaxial installation is ensured through the second rotating part, and axial positioning is achieved through the magnetic coupling action with the external active magnetic ring. A single-stage magnetic block is installed at one end of the driven magnetic ring, and a sensor is installed outside the corresponding spacer sleeve. The sensor is a Hall sensor; It can detect whether the driven magnetic ring rotates and the actual rotation speed. One end of the driven magnetic ring is connected to the rotating shaft, and coaxial installation is ensured through the second bearing assembly, and axial positioning is ensured through the spacer sleeve, so as to transmit the rotational motion to the inside of the container. One or more groups of bearings can be added to ensure the coaxial stability of the rotating shaft. To ensure that the magnets are within the temperature tolerance range, for high-temperature equipment, a longer spacer sleeve can be selected to keep the active magnetic ring and the driven magnetic ring away from the high-temperature equipment, but this will increase the overall occupied space. Therefore, a cooling part is added between the active magnetic ring and the high-temperature equipment to block the temperature transmitted by the equipment, so that the magnetic ring can be ensured not to be affected by temperature, and the cooling medium can directly use a small circulating water pump to achieve cooling, which is lower in cost compared to other parts such as a longer spacer sleeve. Furthermore, the dynamic seal rotating structure is changed to rely on magnetic drive, bearings are used for connection and positioning, the adverse factors of heat generation due to friction are ignored, and at the same time, the rotational resistance effect brought by extrusion sealing is also ignored, and the dynamic seal in the form of a sealing packing is completely cancelled and changed to a static seal, improving the sealing performance and having a higher transmission efficiency. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the background technology in the present utility model.

[0017] Figure 2 It is a cross-sectional view of the magnetic drive stirring structure applicable to a small high-temperature and high-pressure container in the present utility model.

[0018] Figure 3 It is a schematic structural diagram of the active magnetic ring in the present utility model.

[0019] Figure 4 It is a schematic structural diagram of the driven magnetic ring in the present utility model.

[0020] Figure 5This is a partial structural schematic diagram of a magnetic drive stirring structure applicable to a small high-temperature and high-pressure container in the present utility model.

[0021] In the figure: 1. Second nut; 2. Third plug; 3. Sleeve; 4. Active magnetic ring; 41. First plug; 42. First rotating part; 43. Gasket; 44. First magnetic ring; 45. Magnetic ring sleeve; 46. Circlip; 5. Driven magnetic ring; 51. Second plug; 52. Second rotating part; 53. Protection tube; 54. Second magnetic ring; 55. Magnetic ring core shaft; 6. Sensor; 7. Cooling part; 8. Second bearing assembly; 9. Bush; 10. First nut; 11. Container; 12. First bearing assembly; 13. Rotating shaft; 14. O-ring. Specific embodiments

[0022] By providing a magnetic drive stirring structure applicable to a small high-temperature and high-pressure container in the embodiments of the present application, the problem in the prior art is solved that as a seal, the packing can only be non-metal, and common non-metal packings include polytetrafluoroethylene, rubber, graphite, etc. Except for graphite, the heat-resistant temperatures of polytetrafluoroethylene and rubber materials are limited and will quickly fail due to excessive temperature. When the pressure to be sealed continuously increases, the extrusion force between the transmission shaft and the sealing packing will also continuously increase, which will continuously increase the rotational resistance of the shaft, and the parameter selection of the motor will also increase accordingly. Moreover, when rotating for a long time in an environment with large friction, it will 100% cause frictional damage to the surface of the shaft, and the sealing packing will also undergo material denaturation due to frictional heat, resulting in continuous reduction or failure of the sealing effect, which is too wasteful in terms of economy and energy conservation.

[0023] The technical solutions in the embodiments of the present application are to solve the above problems, and the general idea is as follows

[0024] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0025] A magnetic drive stirring structure applicable to a small high-temperature and high-pressure container includes a container 11, a first nut 10 threadedly connected to the bottom of the container 11, a sleeve 3 provided on the first nut 10, a rotating shaft 13 rotating in the sleeve 3, a driven magnetic ring 5 driving the rotating shaft 13 to rotate, an active magnetic ring 4 driving the driven magnetic ring 5 to rotate, a third plug 2 sealing the sleeve 3, and a second nut 1 restricting the position of the third plug 2; the second nut 1 is threadedly connected to the sleeve 3; the sleeve 3 is detachably connected to the container 11 through the first nut 10; the active magnetic ring 4 is provided outside the sleeve 3; the driven magnetic ring 5 is provided inside the sleeve 3; the driven magnetic ring 5 is connected to the rotating shaft 13.

[0026] The driven magnetic ring 5 is provided with single-stage magnetic blocks; a sensor 6 is provided outside the sleeve 3 corresponding to the single-stage magnetic blocks; the sensor 6 detects the rotational speed of the driven magnetic ring 5 and whether it rotates.

[0027] A first bearing assembly 12 is provided inside the container 11; the rotating shaft 13 is connected to the bearing inside the first bearing assembly 12.

[0028] A cooling member 7 is provided on the spacer sleeve 3; a cavity is left between the cooling member 7 and the spacer sleeve 3; pipes are provided at both ends of the cooling member 7; the pipes circulate and inject a coolant into the cavity between the cooling member 7 and the spacer sleeve 3.

[0029] The active magnetic ring 4 includes a magnetic ring sleeve 45, a snap ring 46, a first rotating member 42 provided inside the magnetic ring sleeve 45, a first magnetic ring 44 provided on the first rotating member 42, gaskets 43 provided at both ends of the first magnetic ring 44, and a first plug 41 for restricting the position of the first rotating member 42; there are two sets of the first rotating members 42 arranged oppositely; the gaskets 43 are provided on the first rotating member 42; the first magnetic ring 44 is provided between the two sets of gaskets 43; the first plug 41 is threadedly connected to one end of the magnetic ring sleeve 45 and presses one set of the first rotating members 42; the snap ring 46 is provided at the end of the magnetic ring sleeve 45 away from the first plug 41.

[0030] The driven magnetic ring 5 includes a protective tube 53, a second magnetic ring 54 rotatably arranged inside the protective tube 53, a magnetic ring core shaft 55 provided inside the second magnetic ring 54, second plugs 51 provided at both ends of the second magnetic ring 54, and second rotating members 52 provided on the second plugs 51; the second plugs 51 are provided at both ends of the magnetic ring core shaft 55; the second magnetic ring 54 rotates inside the protective tube 53 through the second rotating members 52.

[0031] An O-ring 14 is provided on the third plug 2.

[0032] A number of second bearing assemblies 8 for restricting the concentricity of the rotating shaft 13 are provided inside the spacer sleeve 3; a spacer sleeve 9 for axial positioning is provided inside the spacer sleeve 3.

[0033] A static seal is achieved between the right side of the spacer sleeve 3 and the container 11 through the second nut 1. On the left side, the second nut 1 presses against the second plug 51. A static seal is achieved between the second plug 51 and the spacer sleeve 3 through the O-ring 14, thus realizing the sealing function of the overall structure. The active magnetic ring 4 is sleeved outside the spacer sleeve 3, and coaxial installation is ensured through the first rotating part 42, and axial positioning is ensured through the snap ring 46. The driven magnetic ring 5 is installed inside the spacer sleeve 3, and coaxial installation is ensured through the second rotating part 52, and axial positioning is achieved through the magnetic coupling with the external active magnetic ring 4. A single-stage magnetic block is installed at one end of the driven magnetic ring 5, and a sensor 6 is installed outside the corresponding spacer sleeve 3. The sensor 6 is a Hall sensor, which can detect whether the driven magnetic ring 5 rotates and the actual rotational speed. One end of the driven magnetic ring 5 is connected to the rotating shaft 13, and coaxial installation is ensured through the second bearing assembly 8, and axial positioning is ensured through the spacer sleeve 9, thereby transmitting the rotational motion to the inside of the container 11. One or more groups of bearings can be added to ensure the coaxial stability of the rotating shaft 13. To ensure that the magnets are within the temperature tolerance range, for high-temperature equipment, the spacer sleeve 3 can be lengthened to keep the active magnetic ring 4 and the driven magnetic ring 5 away from the high-temperature equipment. However, this will increase the overall occupied space. Therefore, a cooling part 7 is added between the active magnetic ring 4 and the high-temperature equipment to block the temperature transmitted by the equipment. In this way, the magnetic rings can be ensured not to be affected by temperature, and the cooling medium can directly use a small circulating water pump to achieve cooling, which is lower in cost compared to lengthening the spacer sleeve 3 and other parts.

[0034] Since a static seal is achieved between the right side of the spacer sleeve 3 and the container 11 through the second nut 1, and the second plug 51 is pressed by the second nut 1 on the left side, and a static seal is achieved between the second plug 51 and the spacer sleeve 3 through the O-ring 14, the sealing function of the overall structure is realized. The active magnetic ring 4 is sleeved outside the spacer sleeve 3, and coaxial installation is ensured through the first rotating part 42, and axial positioning is ensured through the snap ring 46. The driven magnetic ring 5 is installed inside the spacer sleeve 3, and coaxial installation is ensured through the second rotating part 52, and axial positioning is achieved through the magnetic coupling action with the external active magnetic ring 4. A single-stage magnetic block is installed at one end of the driven magnetic ring 5, and a sensor 6 is installed outside the corresponding spacer sleeve 3. The sensor 6 is a Hall sensor, which can detect whether the driven magnetic ring 5 rotates and the actual rotational speed. One end of the driven magnetic ring 5 is connected to the rotating shaft 13, and coaxial installation is ensured through the second bearing assembly 8, and axial positioning is ensured through the spacer sleeve 9, so as to transfer the rotational motion to the inside of the container 11. One or more groups of bearings can be added to ensure the coaxial stability of the rotating shaft 13. To ensure that the magnets are within the temperature tolerance range, for high-temperature equipment, the spacer sleeve 3 can be lengthened to make the active magnetic ring 4 and the driven magnetic ring 5 away from the high-temperature equipment, but this will increase the overall occupied space. Therefore, a cooling part 7 is added between the active magnetic ring 4 and the high-temperature equipment to block the temperature transmitted by the equipment, so that the magnetic ring can be ensured not to be affected by temperature, and the cooling medium can directly use a small circulating water pump to achieve cooling, which is lower in cost compared with other parts such as lengthening the spacer sleeve 3. Furthermore, the dynamic seal rotating structure is changed to rely on magnetic drive, bearings are used for connection and positioning, the adverse factors of heat generation due to friction are ignored, and at the same time, the rotational resistance influence brought by extrusion seal is also ignored, and the dynamic seal in the form of sealing packing is completely cancelled and changed to static seal, improving the sealing performance and making the transmission efficiency higher.

[0035] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0036] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A magnetically driven stirring structure suitable for a small high-temperature and high-pressure container, characterized in that: The invention comprises a container (11), a first nut (10) threadedly connected to the bottom of the container (11), a spacer (3) arranged on the first nut (10), a rotating shaft (13) rotating in the spacer (3), a driven magnetic ring (5) driving the rotating shaft (13) to rotate, an active magnetic ring (4) driving the driven magnetic ring (5) to rotate, a third plug (2) sealing the spacer (3), and a second nut (1) limiting the position of the third plug (2); the second nut (1) is threadedly connected to the spacer (3); the spacer (3) is detachably connected to the container (11) through the first nut (10); the active magnetic ring (4) is arranged on the outer side of the spacer (3); the driven magnetic ring (5) is arranged on the inner side of the spacer (3); and the driven magnetic ring (5) is connected to the rotating shaft (13).

2. The magnetically driven stirring structure suitable for a small high-temperature and high-pressure container according to claim 1, characterized in that: The driven magnetic ring (5) is provided with a single-stage magnetic block; a sensor (6) is provided outside the spacer (3) at a position corresponding to the single-stage magnetic block; the sensor (6) detects the rotation speed of the driven magnetic ring (5) and whether it is rotating.

3. The magnetically driven stirring structure suitable for a small high-temperature and high-pressure container according to claim 1, characterized in that: A first bearing assembly (12) is arranged in the container (11); the rotating shaft (13) is connected to the bearing in the first bearing assembly (12).

4. The magnetically driven stirring structure suitable for a small high-temperature and high-pressure container according to claim 1, characterized in that: A cooling element (7) is provided on the spacer (3); a cavity is left between the cooling element (7) and the spacer (3); pipes are provided at both ends of the cooling element (7); and the pipes circulate and inject cooling liquid into the cavity between the cooling element (7) and the spacer (3).

5. The magnetically driven stirring structure suitable for a small high-temperature and high-pressure container according to claim 1, characterized in that: The active magnetic ring (4) comprises a magnetic ring sleeve (45), a retaining spring (46), a first rotating member (42) arranged in the magnetic ring sleeve (45), a first magnetic ring (44) arranged on the first rotating member (42), gaskets (43) arranged at both ends of the first magnetic ring (44) and a first plug (41) for limiting the position of the first rotating member (42); the first rotating member (42) is arranged in two groups relatively; the gasket (43) is arranged on the first rotating member (42); the first magnetic ring (44) is arranged between the two groups of gaskets (43); the first plug (41) is threadedly connected to one end of the magnetic ring sleeve (45) and presses one group of the first rotating members (42); the retaining spring (46) is arranged at one end of the magnetic ring sleeve (45) away from the first plug (41).

6. The magnetically driven stirring structure suitable for a small high-temperature and high-pressure container according to claim 1, characterized in that: The driven magnetic ring (5) comprises a protective tube (53), a second magnetic ring (54) rotating in the protective tube (53), a magnetic ring core shaft (55) arranged in the second magnetic ring (54), a second plug (51) arranged at both ends of the second magnetic ring (54), and a second rotating member (52) arranged on the second plug (51); the second plug (51) is arranged at both ends of the magnetic ring core shaft (55); the second magnetic ring (54) rotates in the protective tube (53) through the second rotating member (52).

7. The magnetically driven stirring structure suitable for a small high-temperature and high-pressure container according to claim 1, characterized in that: An O-ring (14) is provided on the third seal (2).

8. The magnetically driven stirring structure suitable for a small high-temperature and high-pressure container according to claim 1, characterized in that: A plurality of second bearing assemblies (8) for limiting the concentricity of the rotating shaft (13) are arranged in the spacer sleeve (3); and an axially positioned cushion sleeve (9) is arranged in the spacer sleeve (3).

Images