A stirring shaft for oil refining kettle

Abstract

The invention discloses a stirring shaft of an oil refining kettle, and relates to the technical field of biodiesel equipment design and manufacturing, comprising a driving motor, wherein the output end of the driving motor is connected to an upper shaft tube, and a head shaft is arranged between the driving motor and the upper shaft tube, the other end of the upper shaft tube is connected to an intermediate shaft fork, and the upper shaft tube is connected to an intermediate shaft pin through the intermediate shaft fork, the other end of the intermediate shaft pin is connected to a lower shaft tube, the other end of the lower shaft tube is installed with a tail shaft, and the lower shaft tube is connected to a radial joint ball bearing through the tail shaft, the other end of the radial joint ball bearing is fixedly connected to a support, and the outer surfaces of the upper shaft tube and the lower shaft tube are correspondingly provided with stirring blades. The design changes the connection mode between the head shaft, the intermediate shaft and the tail shaft and the shaft tube from bolt connection after processing to processing after welding, so that the coaxiality of the stirring shaft as a whole can be conveniently adjusted during production assembly or equipment maintenance, reducing the manufacturing difficulty and improving the manufacturing quality of the oil refining kettle.

Description

Technical Field

[0001] The invention relates to the technical field of design and manufacturing of biodiesel equipment, in particular to a stirring shaft of an oil refining kettle. Background Art

[0002] The oil refining kettle is a key equipment in the pretreatment section of biodiesel production. Its working principle is: the heated raw materials are transported to the cylinder of the oil refining kettle through pipelines, and then mixed with sulfuric acid and water in a certain proportion. In this process, after being stirred and fully mixed, they are transported to the lower equipment through the pipeline at the bottom of the kettle. Obviously, the raw materials need to be evenly mixed, and the oil refining kettle needs to work efficiently. The working reliability of the stirring shaft in the oil refining kettle is a key component that affects the working efficiency of the oil refining kettle.

[0003] In existing large and medium-sized oil refining kettles, the stirring shaft usually needs to be manufactured in sections and then connected and assembled. The traditional assembly method is to connect the head shaft, the intermediate shaft, and the tail shaft with the upper and lower shaft tubes respectively with bolts after the processing is completed, and then weld the tail shaft angle steel legs to the inner wall of the conical head at the bottom of the oil refining kettle. This one-time installation cannot adjust the stirring shaft of each section, and it is difficult to ensure the coaxiality requirements of the stirring shaft as a whole and the drive motor reducer. There are manufacturing errors and wear during long-term working processes. In addition, the dynamic balance accuracy of the stirring shaft is poor, which causes eccentric wear and vibration when the stirring shaft rotates, causing early wear of the bearing, affecting the normal operation of the oil refining kettle, and inconvenient maintenance, increasing maintenance costs. Therefore, those skilled in the art provide a stirring shaft for an oil refining kettle to solve the problems raised in the above background technology. Summary of the invention

[0004] The object of the present invention is to provide a stirring shaft for an oil refining kettle to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an oil refinery stirring shaft, comprising a driving motor, wherein the output end of the driving motor is connected to an upper shaft tube, and a head shaft is arranged between the driving motor and the upper shaft tube, the other end of the upper shaft tube is connected to an intermediate shaft fork, and the upper shaft tube is connected to an intermediate shaft pin through the intermediate shaft fork, the other end of the intermediate shaft pin is connected to a lower shaft tube, the other end of the lower shaft tube is equipped with a tail shaft, and the lower shaft tube is connected to a radial joint ball bearing through the tail shaft, the other end of the radial joint ball bearing is fixedly connected to a support, and the outer surfaces of the upper shaft tube and the lower shaft tube are correspondingly provided with stirring blades.

[0006] As a further solution of the present invention: a fixing screw is provided at the connection between the intermediate shaft fork and the intermediate shaft pin, and transverse positioning holes are provided on both sides of one end of the intermediate shaft fork corresponding to the fixing screw, and a vertical positioning hole is provided on one end of the intermediate shaft pin corresponding to the fixing screw, the intermediate shaft fork is adapted to the intermediate shaft pin, and the intermediate shaft fork and the intermediate shaft pin are fixedly connected via the transverse positioning hole, the vertical positioning hole and the fixing screw.

[0007] As a further solution of the present invention: one end of the head shaft is welded and fixed to the upper end of the upper shaft tube, the lower end of the upper shaft tube is welded and fixed to one end of the intermediate shaft fork, one end of the intermediate shaft pin is welded and fixed to the upper end of the lower shaft tube, and the lower end of the lower shaft tube is welded and fixed to one end of the tail shaft.

[0008] As a further solution of the present invention: the upper shaft tube is fixedly connected to the drive motor through the head shaft, and the upper shaft tube is fixedly connected to the lower shaft tube through an intermediate shaft fork, an intermediate shaft pin and a fixing screw, and the lower shaft tube is connected to the support through a radial joint ball bearing and a tail shaft.

[0009] As a further solution of the present invention: a plurality of stirring blades are provided, and every two adjacent stirring blades are vertically arranged on the same horizontal line.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention designs a stirring shaft for an oil refinery, in actual operation, by designing the traditional intermediate connecting shaft into a shaft pin similar to a universal joint and matching it with the shaft fork, and then fixing it with a fixing bolt, so that the connection between the upper shaft tube and the lower shaft tube is more precise, and at the same time, due to the design of the transverse positioning hole on the intermediate shaft fork and the vertical positioning hole on the intermediate shaft pin, the two can be adjusted up and down and left and right, and then the shaft end bearing at the bottom of the stirring shaft is changed from the traditional shaft sleeve to the radial joint ball bearing connection, so that the tail shaft can swing at an appropriate angle, and after being connected with the support, the lower shaft tube can be adjusted up and down and left and right, and the present design changes the connection mode between the head shaft, the intermediate shaft and the tail shaft and the shaft tube from bolt connection after processing to processing after welding, so that the overall coaxiality of the stirring shaft can be conveniently adjusted during production assembly or equipment maintenance, reducing the manufacturing difficulty and improving the manufacturing quality of the oil refinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a stirring shaft of an oil refining kettle;

[0012] Figure 2 It is an exploded schematic diagram of a stirring shaft of an oil refining kettle;

[0013] Figure 3 This is an enlarged schematic diagram of part A in the stirring shaft of an oil refinery kettle.

[0014] In the figure: 1. driving motor; 2. head shaft; 3. upper shaft tube; 4. intermediate shaft fork; 5. intermediate shaft pin; 6. lower shaft tube; 7. radial joint ball bearing; 8. support; 9. tail shaft; 10. stirring blade; 11. vertical positioning hole; 12. fixing screw; 13. horizontal positioning hole. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] See also Figures 1 to 3 In an embodiment of the present invention, a stirring shaft of an oil refining kettle includes a driving motor 1, an output end of the driving motor 1 is connected to an upper shaft tube 3, and a head shaft 2 is arranged between the driving motor 1 and the upper shaft tube 3, and one end of the driving motor 1 is connected to a reducer, the other end of the upper shaft tube 3 is connected to an intermediate shaft fork 4, and the upper shaft tube 3 is connected to an intermediate shaft pin 5 through the intermediate shaft fork 4, the other end of the intermediate shaft pin 5 is connected to a lower shaft tube 6, the other end of the lower shaft tube 6 is installed with a tail shaft 9, and the lower shaft tube 6 is connected to a radial joint ball bearing 7 through the tail shaft 9, the other end of the radial joint ball bearing 7 is fixedly connected to a support 8, and the outer surfaces of the upper shaft tube 3 and the lower shaft tube 6 are correspondingly provided with stirring blades 10, and a plurality of stirring blades 10 are provided, and every two adjacent stirring blades 10 are vertically arranged on the same horizontal line.

[0017] A fixing screw 12 is provided at the connection between the intermediate shaft fork 4 and the intermediate shaft pin 5, and transverse positioning holes 13 are provided on both sides of one end of the intermediate shaft fork 4 corresponding to the fixing screw 12, and a vertical positioning hole 11 is provided on one end of the intermediate shaft pin 5 corresponding to the fixing screw 12. The intermediate shaft fork 4 is adapted to the intermediate shaft pin 5, and the intermediate shaft fork 4 and the intermediate shaft pin 5 are fixedly connected through the transverse positioning hole 13, the vertical positioning hole 11 and the fixing screw 12. Before use, the intermediate shaft pin 5 is inserted into one end of the intermediate shaft fork 4 so that the transverse positioning holes 13 and the vertical positioning holes 11 on the sides of the two are aligned. The vertical positioning holes 11 are on the same horizontal line, and then one end of the fixing screw 12 is passed through the transverse positioning hole 13 on the intermediate shaft fork 4 and the vertical positioning hole 11 on the intermediate shaft pin 5, and then the nut and gasket are screwed to one end of the fixing screw 12 to fix the intermediate shaft fork 4 and the intermediate shaft pin 5, thereby connecting the upper shaft tube 3 and the lower shaft tube 6, and after the intermediate shaft fork 4 and the intermediate shaft pin 5 are connected with the fixing screw 12, through the design of the transverse positioning hole 13 and the vertical positioning hole 11, the two can be adjusted up and down 0-15mm left and right.

[0018] One end of the head shaft 2 is welded and fixed to the upper end of the upper shaft tube 3, the lower end of the upper shaft tube 3 is welded and fixed to one end of the intermediate shaft fork 4, one end of the intermediate shaft pin 5 is welded and fixed to the upper end of the lower shaft tube 6, and the lower end of the lower shaft tube 6 is welded and fixed to one end of the tail shaft 9. The upper shaft tube 3 is fixedly connected to the drive motor 1 through the head shaft 2, and the upper shaft tube 3 is fixedly connected to the lower shaft tube 6 through the intermediate shaft fork 4, the intermediate shaft pin 5 and the fixing screw 12. The lower shaft tube 6 is connected to the support 8 through the radial joint ball bearing 7 and the tail shaft 9. The radial joint ball bearing 7 is used to connect the tail shaft 9 to the support 8. Because the radial joint ball bearing 7 can make the tail shaft 9 swing in the angle range of 0-10°, the lower shaft tube 6 can be adjusted in the up, down, left and right directions after being fixedly connected.

[0019] The working principle of the present invention is: firstly weld one end of the head shaft 2 to the upper end of the upper shaft tube 3, then weld one end of the intermediate shaft fork 4 to the lower end of the upper shaft tube 3, then weld one end of the intermediate shaft pin 5 to the upper end of the lower shaft tube 6, and weld the tail shaft 9 to the lower end of the lower shaft tube 6. Furthermore, the upper shaft tube 3 and the lower shaft tube 6 are fixedly connected by the intermediate shaft fork 4 and the intermediate shaft pin 5 in cooperation with the fixing screw 12, and the lower shaft tube 6 is connected to the support 8 by using the tail shaft 9 and the radial joint ball bearing 7, thereby realizing the upper The assembly of the shaft tube 3 and the lower shaft tube 6, the connection method of the present design ensures the connection strength, avoids the loosening and assembly error caused by the traditional bolt connection, and because the intermediate shaft fork 4 has a horizontal positioning hole 13, the intermediate shaft pin 5 has a vertical positioning hole 11, and the lower end of the lower shaft tube 6 is changed from the traditional shaft sleeve to the radial joint ball bearing 7, so that the tail shaft 9 can swing at an appropriate angle. After the connection, the lower shaft tube 6 can be adjusted in the up, down, left and right directions; in this way, the assembly error and welding deformation caused by the welding deformation can be appropriately compensated. Influence, and rotate the whole stirring shaft. After confirming that the rotation is flexible and there is no jamming phenomenon, the bottom end of the support 8 connected to the tail shaft 9 is welded to the inner wall of the conical head of the cylinder, and then fastened with bolts and nuts, thereby ensuring the coaxiality requirements of the stirring shaft and the drive motor 1 and the reducer. At the same time, when the equipment needs maintenance after running for a period of time, it can also be adjusted by disassembling the fixing screw 12. The operation is simple and convenient. In addition, the shaft tube connection of each segment of the traditional stirring shaft is to first process the head shaft 2, the intermediate shaft and the tail shaft 9 with the shaft tube, and then connect them with bolts. The present invention is to first weld the head shaft 2, the intermediate shaft fork 4, the intermediate shaft pin 5, the tail shaft 9, the radial joint ball bearing 7 with the upper shaft tube 3, the lower shaft tube 6 and the support 8 in turn, and then connect the upper and lower shaft tubes with bolts. This operation changes the traditional connection method from bolt connection after processing to processing after welding, so that the coaxiality of the whole stirring shaft can be conveniently adjusted during production assembly or equipment maintenance, reducing the manufacturing difficulty and improving the manufacturing quality of the oil refining kettle.

[0020] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0021] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A stirring shaft for an oil refining kettle, comprising a driving motor (1), characterized in that: The output end of the driving motor (1) is connected to an upper shaft tube (3), and a head shaft (2) is arranged between the driving motor (1) and the upper shaft tube (3); the other end of the upper shaft tube (3) is connected to an intermediate shaft fork (4), and the upper shaft tube (3) is connected to an intermediate shaft pin (5) via the intermediate shaft fork (4); the other end of the intermediate shaft pin (5) is connected to a lower shaft tube (6); the other end of the lower shaft tube (6) is installed with a tail shaft (9), and the lower shaft tube (6) is connected to a radial joint ball bearing (7) via the tail shaft (9); the other end of the radial joint ball bearing (7) is fixedly connected to a support (8); the outer surfaces of the upper shaft tube (3) and the lower shaft tube (6) are respectively provided with stirring blades (10); and a fixing screw is arranged at the connection between the intermediate shaft fork (4) and the intermediate shaft pin (5). The intermediate shaft fork (4) is provided with a horizontal positioning hole (13) on both sides of one end thereof corresponding to the fixing screw (12); a vertical positioning hole (11) is provided on one end of the intermediate shaft pin (5) corresponding to the fixing screw (12); the intermediate shaft fork (4) is matched with the intermediate shaft pin (5); and the intermediate shaft fork (4) and the intermediate shaft pin (5) are fixedly connected via the horizontal positioning hole (13), the vertical positioning hole (11) and the fixing screw (12); one end of the head shaft (2) is fixedly welded to the upper end of the upper shaft tube (3); the lower end of the upper shaft tube (3) is fixedly welded to one end of the intermediate shaft fork (4); one end of the intermediate shaft pin (5) is fixedly welded to the upper end of the lower shaft tube (6); and the lower end of the lower shaft tube (6) is fixedly welded to one end of the tail shaft (9).

2. The stirring shaft of an oil refining kettle according to claim 1, characterized in that: A plurality of stirring blades (10) are provided, and every two adjacent stirring blades (10) are vertically arranged on the same horizontal line.

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