Stirring blade mounting structure and stirrer

Abstract

The utility model discloses a stirring blade mounting structure and a stirrer. The stirring blade mounting structure comprises a fastening assembly and at least one stirring blade, each stirring blade comprises an integrally formed connecting seat and at least one blade, and the plurality of stirring blades are stacked in an axially aligned manner through the connecting seats; the fastening assembly is suitable for detachably and fixedly connecting the connecting base and the transmission shaft through a connecting part arranged on the connecting base. The stirrer comprises the stirring blade mounting structure. The reaction kettle has the beneficial effects that the mounting mode of the stirring blades is converted from welding to fastening connection, so that the mounting procedure of the stirring blades can be carried out in the reaction kettle, and the problem of complicated mounting of the stirring blades caused by the size limitation of a manhole of a container can be avoided. The stirring blades and the transmission shaft are connected through the mechanical fastening assembly, the problem of inherent stress concentration at the connecting position in a traditional welding mode can be solved, and the anti-fatigue performance of components under alternating loads is greatly improved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of stirring technology, in particular to a stirring blade mounting structure and a stirrer. BACKGROUND

[0002] The open turbine stirrer is the core equipment for fluid mixing process in chemical, pharmaceutical, food, environmental protection and other industries, and the structural design and processing technology of the open turbine stirrer directly affect the production efficiency, product quality and operation and maintenance cost. The traditional open turbine stirrer generally adopts a welding structure of "blade + connecting plate + hub", and the structure has many inherent disadvantages in long-term application.

[0003] (1) The welding of multiple blades results in a large overall diameter of the product, and the installation, disassembly and maintenance process of the equipment is complicated due to the limitation of the size of the container hole, which greatly increases the operation and maintenance cost of the user.

[0004] (2) Welding process is prone to defects such as pores and cracks, and there is a risk of insufficient strength and short service life. Manual welding operation leads to poor product size precision and blade angle consistency, affecting the stability of the stirring process and the mixing effect. At the same time, the welding method causes stress concentration at the connection position of the blade and the hub, and at the connection position of the hub and the stirrer shaft, so that the blade may be damaged due to the turbulence disturbance in the actual working process of the stirrer.

[0005] (3) The production process is complicated, the blade angle depends on manual adjustment, the installation hole has low precision in the traditional processing mode, and the overall manufacturing cycle is long, which cannot meet the needs of large-scale production and rapid delivery.

[0006] (4) Different blade structures of different blade types, such as 2-blade and 4-blade products, cannot be used universally, and the development cycle of non-standard product spare parts is long, the inventory pressure is large, and the user's spare part cost is high. CONTENT OF THE INVENTION

[0007] One of the purposes of the application is to provide a stirring blade mounting structure which can solve at least one of the defects in the background art.

[0008] Another purpose of the application is to provide a stirrer which can solve at least one of the defects in the background art.

[0009] To achieve the above at least one object, the technical scheme adopted by the present application is as follows: a stirring blade mounting structure is arranged at the shaft section of a transmission shaft; the stirring blade mounting structure comprises a fastening assembly and at least one stirring blade; the stirring blade comprises an integrally formed connecting seat and at least one blade, and a plurality of the stirring blades are arranged in axial alignment and superposition through the connecting seat; the connecting seat is sleeved on the transmission shaft through a through hole arranged at the center; the fastening assembly is adapted to detachably fixedly connect the connecting seat and the transmission shaft through the connecting part arranged on the connecting seat.

[0010] Preferably, the connecting seat is provided with a through hole at the center, and the connecting seat is sleeved and mounted on the transmission shaft through the through hole; the side of the connecting seat is provided with a plurality of first connecting holes arranged at equal intervals in the circumferential direction; the fastening assembly comprises a detachable flange assembly and a plurality of bolts; the flange assembly is mounted on the side of the stirring station on the transmission shaft in the axial direction, and the flange assembly is in relative fixed limiting fit with the transmission shaft; the side of the flange assembly is provided with a second connecting hole aligned with the first connecting hole; the bolt is adapted to pass through the corresponding first connecting hole and second connecting hole and is fastened.

[0011] Preferably, the flange assembly is provided with two, and the two flange assemblies are respectively mounted on the two sides of the stirring station along the axial direction of the transmission shaft and are in relative fixed limiting fit with the transmission shaft.

[0012] Preferably, the transmission shaft is provided with a plurality of limiting grooves at equal intervals in the circumferential direction; the flange assembly comprises a plurality of flange blocks, each flange block is provided with a limiting block on the inner side in the radial direction, and the end face of each flange block is provided with at least one second connecting hole; the flange block is in circumferential and axial limiting clamping with the corresponding limiting groove through the limiting block, and all the flange blocks are arranged at equal intervals along the circumferential direction of the transmission shaft.

[0013] Preferably, the transmission shaft is provided with a ring-shaped clamping groove on the side of the stirring station; the inner side of the flange block is in corresponding arc-shaped fit with the clamping groove, so that the flange block is in axial limiting clamping with the clamping groove.

[0014] Preferably, the number of flange blocks is two, and the two flange blocks are both in semicircular structure; the end face of a single flange block is provided with a plurality of second connecting holes, and the inner side of a single flange block is provided with one limiting block in the middle.

[0015] A stirring blade mounting structure is disposed at the end of a drive shaft; the stirring blade mounting structure includes multiple bolts and at least one stirring blade; the stirring blade includes an integrally formed connecting seat and at least one blade, and the multiple stirring blades are stacked and aligned axially through the connecting seat; the connecting seat is provided with multiple connecting holes arranged at equal intervals along the circumferential direction; the multiple bolts pass through the connecting holes on the connecting seat and are threaded and tightened with threaded holes corresponding to the end face of the drive shaft.

[0016] Preferably, the stirring blade is obtained by pressing the blade after cutting a plate of equal thickness.

[0017] A stirrer includes a drive shaft and the aforementioned stirring blade mounting structure, wherein a stirring station is provided on the drive shaft, and the stirring blade mounting structure is mounted on the stirring station.

[0018] Compared with the prior art, the beneficial effects of this application are as follows:

[0019] (1) This application changes the installation method of the stirring blade from welding to fastening connection, so that the installation process of the stirring blade can be carried out inside the reactor, thereby avoiding the problem of complicated installation of the stirring blade caused by the limitation of the manhole size of the container.

[0020] (2) The stirring blades are manufactured using an integrated molding process to avoid defects such as porosity, cracks, and deformation caused by welding; ensuring the strength consistency and dimensional accuracy of each stirring blade, fundamentally improving the reliability and service life of the product.

[0021] (3) The connection between the stirring blade and the drive shaft is achieved by a mechanical fastening assembly, which can eliminate the stress concentration problem inherent in the connection of the traditional welding method and greatly improve the fatigue resistance of the component under alternating load.

[0022] (4) The mechanical connection between the integrally formed stirring blade and the drive shaft makes it possible to install the stirring blade without relying on manual angle adjustment and welding, which can significantly shorten the production cycle and ensure the stability of product quality. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure in this application where the stirring blade is installed on the shaft section of the drive shaft.

[0024] Figure 2 For this application Figure 1 The diagram shows the exploded view of the installation structure.

[0025] Figure 3 This is a schematic diagram of one example of the stirring blade in this application.

[0026] Figure 4 A schematic diagram of the state of the blank after cutting in the present application.

[0027] Figure 5 A schematic diagram of the state of the blade formed by pressing the blank through the pressing die in the present application.

[0028] Figure 6 A schematic diagram of the structure of one of the examples of the flange assembly in the present application.

[0029] Figure 7 A schematic diagram of the structure of another example of the flange assembly in the present application.

[0030] Figure 8 A schematic diagram of the cross-sectional structure of the transmission shaft on one side of the stirring station in the present application.

[0031] Figure 9 A schematic diagram of the partial structure of one of the examples of the transmission shaft in the present application.

[0032] Figure 10 A schematic diagram of the partial structure of another example of the transmission shaft in the present application.

[0033] Figure 11 A schematic diagram of the mounting structure of one of the examples of the stirring blade mounted on the end of the transmission shaft in the present application.

[0034] Figure 12 A schematic diagram of the exploded state of another example of the stirring blade mounted on the end of the transmission shaft in the present application.

[0035] In the figure: blank 01, first part 011, second part 012, upper pressing die 02, upper pressing cavity 021, lower pressing die 03, lower pressing cavity 031, stirring blade mounting structure 1, stirring blade 11, blade 111, connecting seat 112, first connecting hole 1120, through hole 1121, flange assembly 12, second connecting hole 120, flange block 121, limiting block 122, bolt 13, flange seat 14, third connecting hole 140, fixing hole 141, transmission shaft 2, stirring station 21, clamping groove 22, limiting groove 23. DETAILED DESCRIPTION

[0036] Hereinafter, the present application will be further described with reference to the specific embodiments, it should be noted that in the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0037] In the description of the present application, it should be noted that for orientation words such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0038] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be connected, or detachable, or integrated; it can be mechanical connection, or electrical 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, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless specifically defined and limited otherwise, the "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "on", "above" and "over" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The "under", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0041] The terms "comprising" and "having" and any variations thereof in the specification and claims of the present application are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or apparatus that includes a list of steps or units not necessarily limited to those clearly identified, but can include other steps or units not expressly listed or inherent to such processes, methods, products or apparatus.

[0042] One aspect of the present application provides a stirring blade mounting structure, as shown in Figure 1 and Figure 2 The stirring blade mounting structure 1 is arranged at one stirring station 21 of the transmission shaft 2. One preferred embodiment of the stirring blade mounting structure 1 includes at least one stirring blade 11 and a fastening assembly. The stirring blade 11 includes an integrally formed connecting seat 112 and at least one blade 111. Depending on the number of blades 111 formed, a single stirring station 21 can only need to install one stirring blade 11, or can need to install multiple stirring blades 11. When a single stirring station 21 needs to install multiple stirring blades 11, the multiple stirring blades 11 are arranged in axial alignment by stacking through the connecting seat 112. The fastening assembly can detachably connect the connecting seat 112 of the stirring blade 11 with the transmission shaft 2, so that the blade 111 of the stirring blade 11 can be driven to stir the fluid in the reactor by the rotation of the transmission shaft 2. It should be noted that in order to ensure the stability of the stirring, at least two blades 111 are required for a single stirring station 21, and the multiple blades 111 are arranged at equal intervals along the circumferential direction of the transmission shaft 2.

[0043] It can be understood that the traditional way in the installation of the stirring blade installation structure 1, especially for large reactor scene; often in the ground first will stirring blade 11 according to the drawing angle, spacing and direction of the welding on the transmission shaft 2; then through the lifting device will be welded assembly completed stirring blade installation structure 1 hoisted to the vertical state, how to keep the vertical state of stirring blade installation structure 1 from the top of the reactor manhole or special lifting mouth carefully below. Because the unfolding size of stirring blade 11 and the diameter size of manhole is almost the same, in this process, in order to avoid the collision between stirring blade 11 and the inner structure of the reactor, it may be necessary to arrange staff in the reactor to guide. For the unfolding size of stirring blade 11 greater than the diameter of the manhole, it is necessary to arrange staff in the reactor to weld stirring blade 11 and transmission shaft 2. Due to the limited space in the reactor, the welding work is labor intensive and inconvenient to operate. Based on the above, it can be known that the installation process of the traditional welding based stirring blade installation structure 1 is relatively complicated.

[0044] In the technical scheme of the present application, the installation method of stirring blade 11 is changed from welding to fastening connection; therefore, when installing stirring blade installation structure 1, only need to put stirring blade 11 into the reactor in advance, at this time the placement process based on a single stirring blade 11 is relatively easy and simple. Then the staff only need to detachably fix stirring blade 11 and transmission shaft 2 through fastening assembly in the reactor; based on the connection method of fastening assembly, the requirement for installation operation space is not large, which can ensure that the staff can relatively easily complete the installation of stirring blade 11, so as to avoid the problem of complicated installation of stirring blade 11 caused by the size limitation of the manhole of the container. Moreover, the connection between stirring blade 11 and transmission shaft 2 is realized through mechanical fastening assembly, which can eliminate the stress concentration problem at the connection of the traditional welding method, greatly improving the fatigue resistance of the component under alternating load.

[0045] Meanwhile, in the technical scheme of the present application, stirring blade 11 is manufactured by integral molding process, which can avoid the defects such as porosity, crack and deformation caused by traditional welding method; ensure the consistency of the strength of each stirring blade 11 and the dimensional accuracy, and fundamentally improve the reliability and service life of the product. Moreover, the mechanical connection between the integral molding stirring blade 11 and transmission shaft 2 makes the installation of stirring blade 11 not need to rely on manual angle adjustment and welding, which can greatly shorten the production cycle and ensure the stability of product quality.

[0046] In the embodiment, there are various integral molding methods for stirring blade 11, such as casting and pressing molding. For casting, only need to design a mold cavity meeting the structural requirements, and then get it by injecting metal liquid into the mold cavity and cooling forming. The specific forming principle is known to those skilled in the art, so it will not be described in detail here. For pressing molding, such as Figure 4and Figure 5 As shown in the figure, the blank 01 of the stirring blade 11 can be cut from the equal-thickness plate material by wire cutting or blanking, and the blank 01 includes a first part 011 corresponding to the connecting seat 112 and a second part 012 corresponding to the blade 111; then the obtained blank 01 is placed in a special pressing equipment to press the second part 012 through a pressing die. The pressing die of the special pressing equipment mainly includes an upper pressing die 02 and a lower pressing die 03; one side of the upper pressing die 02 is provided with an upper pressing cavity 021, and one side of the lower pressing die 03 is provided with a lower pressing cavity 031; the upper pressing cavity 021 and the lower pressing cavity 031 can cooperate to form an inclined or vertical pressing cavity. When pressing the blade 111, as shown in the figure, the upper pressing die 02 and the lower pressing die 03 are in a separated state, at which time the second part 012 of the blank 01 can be placed between the upper pressing die 02 and the lower pressing die 03; then as shown in the figure, the second part 012 of the blank 01 is inclined to the corresponding angle of the required blade 111 through the closing of the upper pressing die 02 and the lower pressing die 03, and finally the required stirring blade 11 is obtained. Figure 4 Figure 5 As shown in the figure, the blank 01 of the stirring blade 11 can be cut from the equal-thickness plate material by wire cutting or blanking, and the blank 01 includes a first part 011 corresponding to the connecting seat 112 and a second part 012 corresponding to the blade 111; then the obtained blank 01 is placed in a special pressing equipment to press the second part 012 through a pressing die. The pressing die of the special pressing equipment mainly includes an upper pressing die 02 and a lower pressing die 03; one side of the upper pressing die 02 is provided with an upper pressing cavity 021, and one side of the lower pressing die 03 is provided with a lower pressing cavity 031; the upper pressing cavity 021 and the lower pressing cavity 031 can cooperate to form an inclined or vertical pressing cavity. When pressing the blade 111, as shown in the figure, the upper pressing die 02 and the lower pressing die 03 are in a separated state, at which time the second part 012 of the blank 01 can be placed between the upper pressing die 02 and the lower pressing die 03; then as shown in the figure, the second part 012 of the blank 01 is inclined to the corresponding angle of the required blade 111 through the closing of the upper pressing die 02 and the lower pressing die 03, and finally the required stirring blade 11 is obtained.

[0047] It can be understood that, considering that mold design is needed for casting forming and secondary processing of the casting is needed after the mold is opened, the production efficiency of the stirring blade 11 is lower compared with that of the pressing forming; therefore, in the embodiment, the pressing forming is preferably adopted for the integrated forming mode of the stirring blade 11. The inclination angle of the blade 111 of the stirring blade 11 obtained by the pressing forming can meet the requirement of 0~90°. That is, the blade 111 obtained by the pressing forming can not only meet the requirement of the inclined blade structure, but also meet the requirement of the straight blade structure; the specific structure requirement of the blade 111 can be selected by the person skilled in the art according to the actual needs.

[0048] ​In the embodiment, based on the different setting positions of the stirring station 21, the specific way of connecting the stirring blade 11 with the transmission shaft 2 through the fastening assembly is also different; specifically, since the thickness of the connecting seat 112 on the stirring blade 11 is equal to that of the blade 111, the connecting seat 112 can only be fixed in the axial direction with the transmission shaft 2, and cannot or can hardly be fixed in the radial direction. For the axial fixation of the connecting seat 112 with the transmission shaft 2, if the stirring station 21 is set at any shaft section position of the transmission shaft 2, the stirring blade 11 needs to be sleeved with the transmission shaft 2 through the connecting seat 112, which makes the transmission shaft 2 itself not have the condition of being axially connected with the connecting seat 112, and thus the fastening assembly needs to be connected with the transmission shaft 2 to provide the condition of being axially connected with the stirring blade 11; if the stirring station 21 is set at the end position of the transmission shaft 2, since the end surface of the transmission shaft 2 can provide the condition of being axially connected with the stirring blade 11, the fastening assembly only needs to provide fastening connection at this time. In order to facilitate understanding, the specific structures of connecting the stirring blade 11 with the transmission shaft 2 through the fastening assembly in the two scenarios will be described in detail respectively.

[0049] I. For the scenario that the stirring station 21 is set at any shaft section position of the transmission shaft 2.

[0050] In the embodiment, as shown in Figure 3 , the center of the connecting seat 112 is provided with a through hole 1121, so that when the stirring blade 11 is installed, the connecting seat 112 of the stirring blade 11 can be sleeved and installed on the transmission shaft 2 through the through hole 1121; the side of the connecting seat 112 is provided with a plurality of first connecting holes 1120 arranged at equal intervals in the circumferential direction.

[0051] As shown in Figure 2 , Figure 6 , and Figure 7As shown, the fastening assembly includes a flange assembly 12 and a plurality of bolts 13; the flange assembly 12 adopts a detachable structure, so that when the installation of the stirring blade mounting structure 1 is carried out, the stirring blade 11 can be sleeved on the corresponding stirring station 21 of the transmission shaft 2 through the through hole 1121 on the connecting seat 112 first, and then the flange assembly 12 is detached and installed on the side of the corresponding stirring station 21 of the transmission shaft 2. At this time, the flange assembly 12 can be limited in the circumferential direction and the axial direction with the transmission shaft 2, and the second connecting hole 120 on the flange assembly 12 can be aligned with the first connecting hole 1120 on the connecting seat 112. Then, after the bolts 13 are inserted through the corresponding first connecting hole 1120 and the second connecting hole 120, they are fastened and connected, so that the detachable tendency of the flange assembly 12 in the radial direction is limited by the connecting seat 112, and the limiting cooperation of the flange assembly 12 and the transmission shaft 2 in the circumferential direction and the axial direction can ensure that the stirring blade 11 can be relatively fixed with the transmission shaft 2, so that the stirring blade 11 can rotate synchronously with the transmission shaft 2 to realize the stirring of the fluid.

[0052] Specifically, for the fastening connection of the bolts 13 to the flange assembly 12 and the connecting seat 112, the first connecting hole 1120 and the second connecting hole 120 can be threaded holes, and the bolts 13 can be screwed and tightened while passing through the first connecting hole 1120 and the second connecting hole 120. Alternatively, the first connecting hole 1120 and the second connecting hole 120 can be through holes, and the bolts 13 can be screwed and tightened by nuts after passing through the first connecting hole 1120 and the second connecting hole 120.

[0053] It should be noted that for the stirring blade 11 installed at each stirring station 21, only one flange assembly 12 needs to be installed in the axial direction of the transmission shaft 2 on one side of the stirring station 21. However, considering the alternating load received by the stirring blade 11 in the actual working process, it is preferred in this embodiment that the flange assembly 12 is installed on both sides of each stirring station 21. That is, as shown in Figure 1 and Figure 2 As shown, the corresponding flange assembly 12 of the fastening assembly is provided with two, and the two flange assemblies 12 are installed on both sides of the stirring station 21 along the axial direction of the transmission shaft 2 and are limited in cooperation with the transmission shaft 2. The bolt 13 can be inserted from the second connecting hole 120 of one flange assembly 12 and then passed through the first connecting hole 1120 of each stirring blade 11 and then inserted from the second connecting hole 120 of the other flange assembly 12.

[0054] It should be known that since the flange assembly 12 needs to be radially clamped with the transmission shaft 2 to realize the relative fixed limit fit, if the flange assembly 12 adopts an integral structure, it may interfere with the installation of the integral flange assembly 12 based on the sleeving installation of the stirring blade 11, so the flange assembly 12 needs to be designed to be detachable in the embodiment, so that the individual after the flange assembly 12 is split can be independently limited with the transmission shaft 2 in the radial direction of the transmission shaft 2. There are many specific ways for the flange assembly 12 to limit fit with the transmission shaft 2. In order to facilitate understanding, a specific example will be described in detail below.

[0055] Specifically, as shown in Figure 2 , Figure 6 to Figure 8 , the transmission shaft 2 is provided with a plurality of limiting grooves 23 in the circumferential direction at equal intervals. The flange assembly 12 includes a plurality of flange blocks 121, each flange block 121 is provided with a limiting block 122 on the inner side in the radial direction, and the end face of each flange block 121 is provided with at least one second connecting hole 120; when installing the flange assembly 12, the flange block 121 can be limited and clamped with the corresponding limiting groove 23 in the radial direction of the transmission shaft 2 through the limiting block 122, so that the freedom of the flange block 121 in the circumferential direction and the axial direction of the transmission shaft 2 is limited; all the flange blocks 121 are arranged at equal intervals in the circumferential direction of the transmission shaft 2.

[0056] It can be understood that in order to ensure the smooth installation of the flange block 121, the extension direction of the limiting block 122 and the limiting groove 23 is in the radial direction of the transmission shaft 2. The specific number of flange blocks 121 included in the flange assembly 12 can be determined by the actual needs of those skilled in the art. For example, as shown in Figure 6 , the flange assembly 12 includes two flange blocks 121, each flange block 121 is provided with four second connecting holes 120, and the inner side of the single flange block 121 is provided with a limiting block 122, and the limiting block 122 extends in the radial direction of the transmission shaft 2; as shown in Figure 7 , the flange assembly 12 includes four flange blocks 121, each flange block 121 is provided with two second connecting holes 120, and the inner side of the single flange block 121 is provided with a limiting block 122.

[0057] It is considered that the more the number of flange blocks 121, the more the number of limiting blocks 122 required to be processed, and the more the number of limiting grooves 23 provided on the outer side of the transmission shaft 2, the more the number of process times when the transmission shaft 2 is processed. This will eventually lead to a decrease in the processing efficiency of the entire stirring blade installation structure 1, so in the embodiment, the flange assembly 12 preferably adopts two structureally symmetrical flange blocks 121.

[0058] It should be noted that the specific structural size of the limiting block 122 and the limiting groove 23 can be designed according to the actual working condition of the stirring blade 11, as long as the limiting cooperation of the limiting block 122 and the limiting groove 23 can meet the structural strength of the transmission shaft 2 and the load requirement of the stirring blade 11. The specific design process is known to those skilled in the art, and therefore will not be described in detail here.

[0059] In this embodiment, according to the knowledge of material mechanics, if only the limiting cooperation of the limiting block 122 and the limiting groove 23 is relied on to resist the load of the stirring blade 11 in the axial and circumferential directions, the limiting block 122 and the limiting groove 23 need to have sufficient width in the circumferential direction, and the limiting block 122 and the limiting groove 23 need to have sufficient length in the radial direction. In order to ensure that the structural strength of the transmission shaft 2 meets the requirements, it may be necessary to appropriately increase the diameter of the transmission shaft 2, which will inevitably cause the cost and weight of the transmission shaft 2 to increase.

[0060] Therefore, in the technical solution of the present application, as shown in Figure 2 and Figure 8 , the transmission shaft 2 is provided with a ring-shaped clamping groove 22 at the side of the stirring station 21, and the limiting groove 23 is arranged in a local area of the clamping groove 22. The inner side of the flange block 121 is arc-shaped and corresponds to the clamping groove 22. Thus, when the flange assembly 12 is installed, the flange block 121 can be fitted with the clamping groove 22 through the arc-shaped inner side, and the limiting block 122 and the limiting groove 23 can be limited and cooperated. At this time, the axial load of the stirring blade 11 can be resisted by the axial limiting of the flange block 121 and the clamping groove 22, and the circumferential load of the stirring blade 11 can continue to be resisted by the circumferential limiting of the limiting block 122 and the limiting groove 23. Therefore, when designing the structure of the limiting block 122 and the limiting groove 23, the radial extension length of the limiting block 122 and the limiting groove 23 can be effectively shortened, and the extension length of the limiting block 122 and the limiting groove 23 in the circumferential direction can also be shortened. In this way, the increase in the diameter of the transmission shaft 2 can be reduced.

[0061] In a general way, the diameter of the conventional transmission shaft 2 can be D, and in the technical solution of the present application, if the axial load and the circumferential load of the stirring blade 11 are resisted by the limiting cooperation of the limiting block 122 and the limiting groove 23, based on the structural design of the limiting block 122 and the limiting groove 23, the diameter of the transmission shaft 2 may need to be increased from D to 1.2D in order to meet the structural requirements of the transmission shaft 2. When the axial load of the stirring blade 11 is resisted by the axial limiting cooperation of the clamping groove 22 and the flange block 121, based on the structural design of the limiting block 122 and the limiting groove 23, the diameter of the transmission shaft 2 may need to be increased from D to 1.05D-1.1D in order to meet the structural requirements of the transmission shaft 2. Compared with the increase of 1.2D, the cost increase caused by the change in the structural size of the transmission shaft 2 can be appropriately reduced.

[0062] It should be understood that the outer contour shape of the flange assembly 12 can be rectangular or circular. In the present embodiment, a circular outer contour is preferred, and in the present embodiment, the flange assembly 12 preferably includes two flange blocks 121, both of which have a semicircular structure. The end surface of each flange block 121 is provided with a plurality of second connecting holes 120, and the inner side of each flange block 121 is provided with a limiting block 122.

[0063] It should be noted that the limiting grooves 23 on both sides of the single stirring station 21 on the transmission shaft 2 need to be arranged in a staggered manner in the circumferential direction in order to improve the structural strength of the transmission shaft 2. As shown in Figure 9 and Figure 10 Based on the fact that the flange assembly 12 includes two flange blocks 121, the limiting grooves 23 on both sides of the stirring station 21 need to be arranged in a 90° staggered manner in the circumferential direction.

[0064] At the same time, the clamping grooves 22 on the side of the single stirring station 21 can be arranged on both sides of the stirring station 21 as shown in Figure 10 This can provide the stirring blade 11 with stronger axial limiting capability. However, based on the structural arrangement of the two clamping grooves 22, the axial spacing between the two clamping grooves 22 is fixed, and the thickness of the connecting seat 112 is not very accurate during the production of the stirring blade 11, which may cause a gap between the stirring blade 11 installed between the two clamping grooves 22, so that the stirring blade 11 may shake when it is tightened by the bolt 13 and the flange assembly 12. Therefore, in the present embodiment, the clamping groove 22 is arranged on one side of the stirring station 21 as shown in Figure 9As shown, the clamping groove 22 and the limiting groove 23 can be arranged on one side of the stirring station 21 of the transmission shaft 2, and only the limiting groove 23 can be arranged on the other side, and the axial length of the limiting groove 23 needs to be greater than the axial height of the limiting block 122 arranged on the flange block 121. Considering that the transmission shaft 2 is generally vertically installed, it is preferred that the clamping groove 22 and the limiting groove 23 are arranged on the upper side of the stirring station 21, and only the limiting groove 23 is arranged on the lower side of the stirring station 21. Based on the different structural arrangements of the two sides of the stirring station 21, the flange assemblies 12 installed on the two sides are also different, as shown in Figure 2 As shown, the flange assembly 12 on the upper side of the stirring station 21 can be defined as an upper flange assembly 12a, and the flange assembly 12 on the lower side of the stirring station 21 can be defined as a lower flange assembly 12b. Among them, the equivalent circle diameter of the inner side of the flange block 121 corresponding to the upper flange assembly 12a is equal to or slightly greater than the diameter of the clamping groove 22, and the equivalent circle diameter of the inner side of the flange block 121 corresponding to the lower flange assembly 12b is equal to or slightly greater than the diameter of the transmission shaft 2.

[0065] II. The scenario that the stirring station 21 is arranged at the end position of the transmission shaft 2.

[0066] In this embodiment, as shown in Figure 11 As shown, a plurality of connection holes, i.e., first connection holes 1120, are arranged on the connecting seat 112 along the circumferential direction at equal intervals. The fastening assembly includes a plurality of bolts 13, and the plurality of bolts 13 are screwed through the connection holes on the connecting seat 112 and the threaded holes correspondingly arranged on the end face of the transmission shaft 2.

[0067] It should be known that the mode of directly connecting the connecting seat 112 by opening threaded holes on the end face of the transmission shaft 2 is generally only applicable to transmission shafts 2 with relatively large diameters. If the diameter of the transmission shaft 2 is relatively small, the threaded holes that are opened are relatively concentrated, which may result in insufficient structural strength. Therefore, in this embodiment, for the transmission shaft 2 with a relatively small diameter, as shown in Figure 12 As shown, a flange seat 14 can be installed on the end face of the transmission shaft 2, a plurality of third connection holes 140 are arranged on the outer side of the flange seat 14 along the circumferential direction, the third connection holes 140 can be aligned with the first connection holes 1120 arranged on the connecting seat 112, and a relatively small number of fixing holes 141 are arranged at the center of the flange seat 14. That is, at this time, the fastening assembly includes the flange seat 14, a plurality of first bolts 131, and a plurality of second bolts 132; when installing the stirring blade 11, the stirring blade 11 can be first sleeved on the end side wall of the transmission shaft 2 through the through hole 1121 at the center of the connecting seat 112, then the flange seat 14 is screwed and fastened with the threaded holes arranged on the end face of the transmission shaft 2 through the second bolts 132 passing through the fixing holes 141, and finally the first bolts 131 are fastened and fixed through the nuts after passing through the first connection holes 1120 on the connecting seat 112 and the third connection holes 140 on the flange seat 14.

[0068] Another aspect of the present application provides a stirrer as shown in Figure 1 and Figure 2 wherein one preferred embodiment includes a drive shaft 2 and the above-described blade mounting structure 1.

[0069] The foregoing describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments, and the above-described embodiments and descriptions in the specification are only the principles of the present application. Various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A stirring blade mounting structure, disposed at a section of a drive shaft, characterized in that, The stirring blade comprises a connecting seat and at least one blade, and a plurality of the stirring blades are arranged in axial alignment and stacking through the connecting seat. The connecting seat is detachably fixed to the transmission shaft through the connecting part provided on the connecting seat. The side of the connecting seat is provided with a plurality of first connecting holes arranged at equal intervals in the circumferential direction to form the connecting part.

2. The stirring blade mounting structure according to claim 1, wherein The side of the flange assembly is provided with a second connecting hole aligned with the first connecting hole. The flange assembly is provided with two flange blocks, and the inner side of each flange block is provided with a limiting block. The flange block is circumferentially and axially limited and clamped through the limiting block and the limiting groove.

3. The stirring blade mounting structure according to claim 2, wherein The transmission shaft is provided with a ring-shaped clamping groove on the side of the stirring station.

4. The stirring blade mounting structure according to claim 2, wherein The inner side of the flange block is arc-shaped and corresponds to the clamping groove, so that the flange block is axially limited and clamped with the clamping groove. The number of flange blocks is two, and each flange block is semicircular. The inner side of each flange block is provided with a limiting block.

5. The stirring blade mounting structure according to claim 4, wherein The stirring blade is obtained by cutting a plate with equal thickness and then pressing the blade.

6. The stirring blade mounting structure according to Claim 5, wherein The stirring blade is obtained by casting.

7. A stirring blade mounting structure, disposed at the end of a drive shaft, characterized in that, The stirring blade mounting structure of any one of claims 1-9. The stirring blade mounting structure of any one of claims 1-9. ​ 8. The stirring blade mounting structure according to any one of claims 1 to 7, wherein ​ 9. The stirring blade mounting structure according to any one of claims 1 to 7, wherein ​ 10. A whisk, characterized by ​

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