Magnetic transmission reaction kettle capable of realizing bearing protection

Abstract

The invention relates to a magnetic transmission reaction kettle capable of realizing bearing protection, which comprises a kettle body and a stirring shaft with a rotating axis extending along the vertical direction, the stirring shaft is provided with stirring blades positioned in an inner cavity of the kettle body, the stirring shaft is connected with a stirring shaft bearing, and the upper end of the kettle body is provided with a kettle body extension section vertically arranged. The inner diameter of the kettle body extension section is smaller than that of the kettle body inner cavity, the inner cavity of the kettle body extension section forms an extension section gas phase space with the lower end communicated with the kettle body inner cavity, a baffle is arranged at the upper end of the kettle body extension section, the middle of the stirring shaft penetrates through the baffle and the extension section gas phase space, and the stirring shaft bearing is located on the upper side of the baffle. And a defoaming impeller positioned in the kettle body extension section and / or at the joint of the kettle body extension section and the inner cavity of the kettle body is fixed on the stirring plate shaft. The invention provides the magnetic transmission reaction kettle capable of realizing bearing protection, which can prevent solid particles from entering the lower side bearing to cause abrasion of the lower side bearing.

Description

Technical Field

[0001] The invention relates to reaction equipment in the technical field of metallurgy and chemical industry, and in particular to a magnetic transmission reactor capable of realizing bearing protection. Background Art

[0002] Magnetic transmission reactor, also known as magnetic reactor or magnetic drive reactor, is a commonly used equipment in the fields of metallurgy and chemical industry, and is mostly used in high temperature, high pressure and toxic working conditions.

[0003] Existing magnetic transmission reactors, such as "a magnetically driven high-pressure reactor" disclosed in Chinese patent CN207591814U, include a reactor body upper end rotatably equipped with a stirring shaft through a stirring shaft bearing, the stirring shaft bearing includes an upper bearing and a lower bearing, the lower bearing is close to the reactor cavity of the reactor body, the stirring shaft is provided with a stirring blade located in the reactor body, the magnetically driven high-pressure reactor also includes a stirring shaft driving mechanism, the stirring shaft driving mechanism includes a motor and a reducer connected to the motor, and the reducer is connected to the stirring shaft through a magnetic coupler.

[0004] The magnetic transmission reactor completely cuts off the leakage of the medium, so it is suitable for use in high temperature, high pressure and toxic working conditions. However, the existing problem of this type of reactor is that the lower bearing of the stirring shaft bearing is close to the reactor cavity. During the operation of the reactor, the stirring shaft carries the stirring blades to stir the materials. The materials are prone to splashing under the stirring action, and some materials will also produce foam under the action of stirring. The splashing materials and foams will contain solid particles, and most of the solid particles will float up with the foam. These solid particles will enter the lower bearing along the axial direction of the stirring shaft, thereby causing wear of the lower bearing and affecting the service life of the lower bearing. This problem not only reduces the application scenario of the magnetic transmission reactor, but also requires frequent replacement of the lower bearing, which will not only increase the cost of use, but also cause the magnetic transmission reactor to be unable to be used normally when the lower bearing is replaced, and will also affect the production efficiency of the production enterprise. Summary of the invention

[0005] The object of the present invention is to provide a magnetic transmission reactor capable of protecting the bearings and preventing solid particles from entering the lower bearings and causing wear of the lower bearings.

[0006] In order to solve the above technical problems, a technical solution of a magnetic transmission reactor capable of protecting bearings in the present invention is as follows: A magnetic transmission reactor capable of achieving bearing protection, comprising a reactor body and a stirring shaft whose rotation axis extends in the up-down direction, the stirring shaft is provided with stirring blades located in the inner cavity of the reactor body, the stirring shaft is connected with a stirring shaft bearing, the upper end of the reactor body is provided with a vertically arranged reactor body extension section, the inner diameter of the reactor body extension section is smaller than the inner diameter of the inner cavity of the reactor body, the inner cavity of the reactor body extension section constitutes an extension section gas phase space whose lower end is connected to the inner cavity of the reactor body, a baffle plate is provided at the upper end of the reactor body extension section, the middle part of the stirring shaft passes through the baffle plate and the extension section gas phase space, the stirring shaft bearing is located on the upper side of the baffle plate, and a defoaming impeller located in the reactor body extension section and / or at the junction of the reactor body extension section and the inner cavity of the reactor body is fixed on the stirring plate shaft.

[0007] Furthermore, a mounting cylinder is provided at the upper end of the kettle body extension section, a mounting plate is provided at the upper end of the mounting cylinder, and the stirring shaft bearing includes an upper bearing provided between the mounting plate and the stirring shaft and a lower bearing provided between the baffle plate and the stirring shaft.

[0008] Furthermore, a stirring shaft driving mechanism is provided at the upper end of the mounting cylinder and is transmission-connected to the stirring shaft through a magnetic coupling.

[0009] Furthermore, the height of the extension section in the attached drawing is not less than 30 cm.

[0010] Furthermore, the defoaming impeller includes an upper impeller located in the kettle extension section and a lower impeller located at the junction of the kettle extension section and the kettle inner cavity, and the outer diameter of the lower impeller is smaller than the inner diameter of the kettle extension section.

[0011] Furthermore, the stirring shaft includes an upper stirring shaft portion and a lower stirring shaft portion connected to the upper stirring shaft portion by bolts, the stirring blades are arranged on the lower stirring shaft portion, and the defoaming impeller is arranged on the upper stirring shaft portion.

[0012] Furthermore, the upper impeller includes three upper blades spaced apart along the circumferential direction, and the lower impeller includes three lower blades spaced apart along the circumferential direction, and the projection of each upper blade in the up-down direction is located between two corresponding adjacent lower blades.

[0013] Furthermore, the three upper blades arranged in sequence are called the first upper blade, the second upper blade and the third upper blade, and the three lower blades arranged in sequence are called the first lower blade, the second lower blade and the third lower blade. A first defoaming rope is arranged between the first upper blade and the first lower blade, a second defoaming rope is arranged between the second upper blade and the second lower blade, and a third defoaming rope is arranged between the third upper blade and the third lower blade.

[0014] Furthermore, there are multiple first defoaming ropes, which are arranged at intervals along the radial direction of the stirring shaft; there are multiple second defoaming ropes, which are arranged at intervals along the radial direction of the stirring shaft; there are multiple third defoaming ropes, which are arranged at intervals along the radial direction of the stirring shaft.

[0015] Furthermore, when the upper impeller and the lower impeller rotate with the stirring shaft, due to the centrifugal effect, the maximum rotation radius of the outermost first defoaming rope, the second defoaming rope and the third defoaming rope is greater than the rotation radius of the upper impeller and the lower impeller.

[0016] The beneficial effects of the present invention are as follows: when the reactor is fed, as the liquid level in the reactor rises, the air above the liquid level will be retained at the upper end of the inner cavity of the reactor. As the reactor continues to be fed and the pressure increases, the residual gas will be further compressed, thereby forming a gas phase space with a certain pressure at the upper part of the reactor. This part of the pressurized gas enters the extended section of the reactor with a smaller diameter. Since the inner diameter of the extended section of the reactor is smaller, the gas phase height of the same gas is greatly increased, which can avoid or reduce the splashing of the reactor material into the stirring shaft bearing; in addition, the setting of the defoaming impeller can break up the spray and foam formed during the material stirring process and press them downward, avoiding the spray and foam from entering the upper side of the defoaming impeller, thereby further reducing the risk of wear of the stirring shaft bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 It is a schematic structural diagram of an embodiment of the present invention; Figure 2 yes Figure 1 A in the enlarged view; Figure 3 It is a schematic diagram of the coordination of the upper impeller and the lower impeller in the top view; Figure 4 It is a schematic diagram of the state of the second defoaming rope when the stirring shaft rotates; 1. Stirring shaft drive mechanism; 2. Upper bearing; 3. Mounting plate; 4. Lower bearing; 5. Baffle plate; 6. Stirring shaft; 7. Gas phase space of kettle body; 8. Gas phase space of extension section; 9. Feed inlet; 10. Liquid surface; 11. Kettle body; 12. Inner cavity of kettle body; 13. Lower stirring shaft part; 14. Stirring blades; 15. Upper stirring shaft part; 16. Kettle body extension section; 17. Upper impeller; 18. Lower impeller; 19. Upper blades; 20. Lower blades; 21. First defoaming rope; 22. First upper blades; 23. Second upper blades; 24. Third upper blades; 25. First lower blades; 26. Second lower blades; 27. Third lower blades; 28. Second defoaming rope; 29. ​​Third defoaming rope. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are provided in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0019] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0020] An embodiment of a magnetic transmission reactor capable of protecting bearings in the present invention is as follows: Figures 1 to 3 As shown: it includes a kettle body 11 and a stirring shaft 6 whose rotation axis extends in the up-down direction, the stirring shaft 6 is provided with stirring blades 14 located in the inner cavity of the kettle body, and the stirring shaft is connected with a stirring shaft bearing.

[0021] The upper end of the kettle body has a vertically arranged kettle body extension section 16, the inner diameter of which is smaller than the inner diameter of the kettle body inner cavity 12. In this embodiment, the height of the kettle body extension section 16 is not less than 30 cm, for example, it can be 30 cm, 40 cm, 50 cm or 60 cm. A feed port 9 is arranged at the top of the kettle body.

[0022] The inner cavity of the kettle extension section 16 constitutes an extension section gas phase space 7 whose lower end is connected to the inner cavity of the kettle body. A baffle plate 5 is provided at the upper end of the kettle extension section. The middle part of the stirring shaft passes through the baffle plate and the extension section gas phase space. The stirring shaft bearing is located on the upper side of the baffle plate 5. A defoaming impeller located in the kettle extension section and (or) at the junction of the kettle extension section and the inner cavity of the kettle body is fixed on the stirring plate shaft. In this embodiment, a mounting cylinder is provided at the upper end of the kettle extension section, and a mounting plate 3 is provided at the upper end of the mounting cylinder. The stirring shaft bearing includes an upper bearing 2 provided between the mounting plate and the stirring shaft and a lower bearing 4 provided between the baffle plate and the stirring shaft. A stirring shaft drive mechanism 1 is provided at the upper end of the mounting cylinder, which is connected to the stirring shaft through a magnetic coupling. The stirring shaft drive mechanism includes a drive motor and a reducer. The stirring shaft drive mechanism, that is, the transmission between the stirring shaft drive mechanism and the stirring shaft, belongs to the prior art and will not be described in detail here.

[0023] The defoaming impeller includes an upper impeller 17 located in the kettle extension section and a lower impeller 18 located at the junction of the kettle extension section and the kettle inner cavity. The outer diameters of the upper impeller 17 and the lower impeller 18 are smaller than the inner diameter of the kettle extension section 16.

[0024] The stirring shaft includes an upper stirring shaft portion 15 and a lower stirring shaft portion 13 connected to the upper stirring shaft portion by bolts, the stirring blades are arranged on the lower stirring shaft portion, and the defoaming impeller is arranged on the upper stirring shaft portion. An inspection hole is arranged on the side wall of the kettle body, so that when the stirring shaft needs to be replaced and repaired, the staff enters the inner cavity of the kettle body through the inspection hole, removes the connection between the lower stirring shaft portion and the upper stirring shaft portion, and moves the lower stirring shaft portion out of the kettle body through the inspection hole, and the upper stirring shaft portion can be moved out vertically from bottom to top through the extended section gas phase space with the defoaming impeller, thereby realizing the inspection of the stirring shaft.

[0025] The upper impeller 17 includes three upper blades spaced apart along the circumferential direction, and the lower impeller 18 includes three lower blades spaced apart along the circumferential direction. The projection of each upper blade in the up-down direction is located between two corresponding adjacent lower blades. The upper blades and the lower blades are spiral blades, and the blade attack angles of the upper blades and the lower blades are 3~15°.

[0026] In this embodiment, the three upper blades arranged in sequence are called the first upper blade 22, the second upper blade 23 and the third upper blade 24, and the three lower blades arranged in sequence are called the first lower blade 25, the second lower blade 26 and the third lower blade 27. A first defoaming rope 21 is arranged between the first upper blade 22 and the first lower blade 25, a second defoaming rope 28 is arranged between the second upper blade 23 and the second lower blade 26, and a third defoaming rope 29 is arranged between the third upper blade 24 and the third lower blade 27. There are multiple first defoaming ropes, which are arranged at intervals along the radial direction of the stirring shaft; there are multiple second defoaming ropes, which are arranged at intervals along the radial direction of the stirring shaft; there are multiple third defoaming ropes, which are arranged at intervals along the radial direction of the stirring shaft. In this embodiment, there are six first defoaming ropes, six second defoaming ropes and six third defoaming ropes.

[0027] When the upper impeller and the lower impeller rotate with the stirring shaft, the maximum gyration radius of the first, second and third defoaming ropes of the outermost layer is greater than the gyration radius of the upper and lower impellers due to the centrifugal effect. Specifically, when the stirring shaft rotates, the first, second and third defoaming ropes can contact the inner wall of the extended section of the kettle body due to the centrifugal effect, thereby achieving defoaming work without dead angles in the radial direction.

[0028] A discharge port is provided at the bottom of the kettle body. When the present invention is in use, materials are added into the inner cavity of the kettle body through the feed port. As the liquid level 10 in the inner cavity of the kettle body rises, when the liquid level is above the discharge port, the air above the discharge port will be retained in the reactor. As the reactor is continuously fed and the pressure increases, the residual gas will be further compressed, thereby forming a kettle body gas phase space 7 on the upper side of the liquid surface of the reactor, and the kettle body liquid phase space is below the liquid surface.

[0029] The feature of the present invention is that a kettle extension section with a smaller diameter is used. The gas phase height of the same gas is greatly increased, which can avoid or reduce the material in the inner cavity of the kettle from splashing into the lower bearing. During operation, the stirring shaft rotates with the stirring blades and the defoaming impeller. The stirring blades stir the material. During the stirring process, the material will produce floating foam. The floating foam is mixed with solid particles, and some solid particles will splash. The splashing solid particles are easily blocked by the defoaming impeller. Some solid particles will float upward with the foam. In the present invention, the upper impeller and the lower impeller can not only block the splashing of solid particles, but also break up the foam. At the same time, the upper blades and the lower blades can also press down the foam to avoid the foam floating upward. The lower blades are staggered with the upper blades in the circumferential direction, so that when the upper blade presses down on the foam on its lower side, the foam will not be blocked by the corresponding lower blade.

[0030] Although there is a defoaming impeller, the foam may still float up along the gap between the defoaming impeller and the extension section of the kettle body. If there is a lot of foam accumulated between the upper impeller and the lower impeller, the foam may further float up through the gap between the upper impeller and the extension section of the kettle body. Therefore, in the present invention, the foam between the upper impeller and the lower impeller is broken up by the rotation of the defoaming rope. On the one hand, the defoaming rope is connected to the staggered upper blades and the lower blades, and the defoaming rope can have a longer length, which can increase the defoaming efficiency; on the other hand, the defoaming ropes are arranged at intervals along the radial direction, which can cover most of the foam area in the radial direction. When the upper impeller and the lower impeller rotate, the middle part of the defoaming rope is thrown out by the centrifugal force, and each defoaming rope forms a drum-shaped rotating defoaming surface, such as Figure 4 As shown, along the radial direction of the stirring shaft, the two adjacent rotating defoaming surfaces are respectively called the inner rotating defoaming surface and the outer rotating defoaming surface, and the outermost end of the inner rotating defoaming surface extends into the concave structure of the outer rotating defoaming surface, so that the floating foam can be broken up, and there is basically no blind spot for breaking up, and the maximum rotation radius of the outermost first defoaming rope, the second defoaming rope and the third defoaming rope is larger than the rotation radius of the upper impeller and the lower impeller, and the outermost ends of the first defoaming rope, the second defoaming rope and the third defoaming rope are in contact with the inner wall of the extension section of the kettle body to prevent the foam from floating up along the inner wall of the extension section of the kettle body.

[0031] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0032] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0033] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic transmission reactor capable of achieving bearing protection, comprising a reactor body and a stirring shaft with a rotation axis extending in the up-down direction, a stirring blade located in the inner cavity of the reactor body is arranged on the stirring shaft, and a stirring shaft bearing is connected to the stirring shaft, characterized in that: The upper end of the kettle body is provided with a vertically arranged kettle body extension section, the inner diameter of the kettle body extension section is smaller than the inner diameter of the inner cavity of the kettle body, the inner cavity of the kettle body extension section constitutes an extension section gas phase space whose lower end is connected with the inner cavity of the kettle body, and a baffle plate is arranged at the upper end of the kettle body extension section, the middle part of the stirring shaft passes through the baffle plate and the extension section gas phase space, the stirring shaft bearing is located on the upper side of the baffle plate, and a defoaming impeller is fixed on the stirring plate shaft and is located in the kettle body extension section and / or at the junction of the kettle body extension section and the inner cavity of the kettle body.

2. The magnetic transmission reactor according to claim 1, characterized in that: The upper end of the kettle extension section is provided with a mounting cylinder, the upper end of the mounting cylinder is provided with a mounting plate, and the stirring shaft bearing comprises an upper bearing arranged between the mounting plate and the stirring shaft and a lower bearing arranged between the baffle plate and the stirring shaft.

3. The magnetic transmission reactor according to claim 1, characterized in that: The upper end of the installation cylinder is provided with a stirring shaft driving mechanism which is transmission-connected with the stirring shaft through a magnetic coupling.

4. The magnetic transmission reactor according to claim 1, characterized in that: The height of the extension section in the attached drawing is not less than 30cm.

5. The magnetic transmission reactor according to claims 1 to 4, characterized in that: The defoaming impeller comprises an upper impeller located in the kettle body extension section and a lower impeller located at the junction of the kettle body extension section and the kettle body inner cavity, and the outer diameter of the lower impeller is smaller than the inner diameter of the kettle body extension section.

6. The magnetic transmission reactor according to claim 5, characterized in that: The stirring shaft comprises an upper stirring shaft part and a lower stirring shaft part connected to the upper stirring shaft part by bolts, the stirring blades are arranged on the lower stirring shaft part, and the defoaming impeller is arranged on the upper stirring shaft part.

7. The magnetic transmission reactor according to claim 5, characterized in that: The upper impeller includes three upper blades spaced apart along the circumference, and the lower impeller includes three lower blades spaced apart along the circumference. The projection of each upper blade in the up-down direction is located between two corresponding adjacent lower blades, and the upper blades and the lower blades are spiral blades.

8. The magnetic transmission reactor according to claim 7, characterized in that: The three upper blades arranged in sequence are called the first upper blade, the second upper blade and the third upper blade, the three lower blades arranged in sequence are called the first lower blade, the second lower blade and the third lower blade, a first defoaming rope is arranged between the first upper blade and the first lower blade, a second defoaming rope is arranged between the second upper blade and the second lower blade, and a third defoaming rope is arranged between the third upper blade and the third lower blade.

9. The magnetic transmission reactor according to claim 7, characterized in that: There are multiple first defoaming ropes, which are arranged at intervals along the radial direction of the stirring shaft; there are multiple second defoaming ropes, which are arranged at intervals along the radial direction of the stirring shaft; there are multiple third defoaming ropes, which are arranged at intervals along the radial direction of the stirring shaft.

10. The magnetic transmission reactor according to claim 9, characterized in that: When the upper impeller and the lower impeller rotate with the stirring shaft, due to the centrifugal effect, the maximum gyration radius of the outermost first defoaming rope, the second defoaming rope and the third defoaming rope is greater than the gyration radius of the upper impeller and the lower impeller.

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