A method for manufacturing spiral ribbon of stirring equipment

Abstract

A method for making a spiral ribbon for a mixing equipment comprises marking an upper positioning plate on a cylinder according to the molding size and spacing of the spiral ribbon, and fixing the upper positioning plate in the vertical direction of the spiral ribbon molding. The reference spiral ribbon is fixed to the upper positioning plate according to the standard pitch requirements to ensure that the reference spiral ribbon fits tightly with the upper positioning plate. From bottom to top, a spiral ribbon pressing device is used to fit the steel sheet tightly with the reference spiral ribbon, and the gap shall not exceed 0.5 mm. After the gap is measured and qualified, a semi-finished spiral ribbon can be obtained. With the spiral ribbon pressing tooling, one person can complete the pressing of the spiral ribbon, with high pressing efficiency and good molding effect.

Description

Technical Field

[0001] The invention relates to the field of chemical equipment manufacturing, and in particular to a method for manufacturing a spiral ribbon of a stirring device. Background Art

[0002] The stirring equipment is one of the most critical equipment in the production device. In order to make the materials undergo polymerization reaction, the chemical reaction process cannot be separated from the stirring of the stirring equipment. The function of the stirring equipment is to make the materials participating in the reaction mix evenly, the gas is well dispersed in the liquid phase, the solid particles are evenly suspended in the liquid phase, the liquid phase remains suspended or emulsified, and the heat and mass transfer between phases are enhanced. The stirring process is a necessary means to complete the chemical process. Through stirring, the fluid in the area near the stirrer creates a fully mixed area with high turbulence, and on the other hand, a high-speed jet is generated to push all the liquid to flow along a certain path in the tank body. This increases the relative speed and improves the heat transfer efficiency.

[0003] Therefore, the production of mixing equipment is very important, especially the production of screw ribbons and the size of screw ribbons, including: screw ribbon cutting size control, screw ribbon processing and forming control, screw ribbon pre-assembly size control, screw ribbon polishing quality control, etc., among which the most critical is the screw ribbon processing and forming control.

[0004] The existing method for processing spiral ribbons is to use a press machine in conjunction with a mold to press and form. Due to the elastic deformation of the material, if no other measures are taken during pressing, even if heating measures are taken, they cannot directly act on the formed spiral ribbon, and its forming size is difficult to control. In addition, the spiral ribbon pitch is large, and the force at each point is uneven, resulting in local uneven forming. Summary of the invention

[0005] In order to overcome the deficiencies of the above technologies, the present invention provides a method for making a spiral ribbon for a stirring device. The method ensures the processing and forming size of the spiral ribbon by making a drawing tool; and eliminates the deformation after drawing and forming through flame heating, thereby ensuring the forming size of the spiral ribbon.

[0006] The technical solution adopted by the present invention to overcome the technical problems is:

[0007] A method for manufacturing a spiral ribbon of a stirring device comprises the following steps:

[0008] a) The cylinder is welded and fixed on the base, the axis of the cylinder is arranged in the vertical direction, and the diameter of the cylinder matches the inner diameter of the spiral belt;

[0009] b) A plurality of upper positioning plates are welded and fixed on the outer wall of the cylinder along the circumferential direction, the upper positioning plates are arranged along the vertical direction and the upper positioning plates are arranged in a spiral pattern, and a reference spiral belt is installed at the lower end of each upper positioning plate, and the curvature of the lower end surface of the reference spiral belt matches that of the upper end surface of the spiral belt;

[0010] c) spot welding and fixing a plurality of support seats on the outer wall of the cylinder, wherein the support seats are arranged at intervals along the circumferential direction;

[0011] d) Install a screw belt pressing device on the lowest support seat, set a steel sheet at the lower end of the reference screw belt, and weld the lower end of the steel sheet to the lower end of the reference screw belt;

[0012] e) The action of the spiral belt pressing device pushes the steel sheet upward to deform it until the upper end surface of the steel sheet contacts the lower end surface of the reference spiral belt, and a lower positioning plate is arranged at the lower end of the deformed steel sheet, and the lower positioning plate is spot welded and fixed to the outer wall of the cylinder;

[0013] f) after removing the spiral ribbon pressing device from the support seat at the lower end, moving it to the upper end and installing it on another support seat adjacent to the support seat at the lower end, and repeating step e);

[0014] g) Repeat step f) until the steel sheet is completely deformed and its upper end surface is in contact with the lower end surface of the reference spiral ribbon, thereby forming a spiral ribbon;

[0015] h) Remove the welding point between the steel sheet and the reference screw belt, and extract the manufactured screw belt from the gap between the reference screw belt and the lower positioning plate.

[0016] Preferably, in step a), the roundness of the cylinder is less than or equal to 2 mm.

[0017] Preferably, the spiral ribbon pressing device in step d) is a jack, and the jack is installed on the corresponding support seat through threaded fasteners.

[0018] Furthermore, the method further includes removing the spot welding points of each lower positioning plate and each supporting seat on the outer wall of the cylinder after step h), and removing each lower positioning plate and each supporting seat from the cylinder.

[0019] Furthermore, the method further comprises heating the spiral ribbon with a flame heating device after step g) to eliminate stress.

[0020] Furthermore, the steps of heating the spiral ribbon by using the flame heating device are as follows:

[0021] g-1) Weld several supporting angle steels on the cylinder;

[0022] g-2) A manifold is arranged at the lower end of the spiral belt, and the manifold is fixed to the supporting angle steel through a fixing device. A pipe joint is arranged at the head end of the manifold, and the manifold is connected to the external combustion gas source through the pipe joint. The manifold is located below the spiral belt, and a plurality of nozzles are arranged at intervals along the length direction of the manifold, and the nozzles are directly facing the spiral belt;

[0023] g-3) An external combustion gas source provides fuel gas to the manifold, which heats the ribbon through combustion in the nozzle;

[0024] g-4) After heating the screw belt to eliminate stress, cut off the gas, pull the screw belt out from the gap between the reference screw belt and the lower positioning plate, loosen the fixing device and remove the collecting pipe from the supporting angle steel.

[0025] Preferably, the fixing device is a U-shaped bolt, which fixes the manifold to the supporting angle steel.

[0026] Furthermore, the method further includes trimming and inspecting the size of the spiral belt using a trimming device after step h).

[0027] Furthermore, the steps of trimming and dimensional inspection of the spiral ribbon using the trimming device are as follows:

[0028] i-1) an axis is arranged in the horizontal direction, a support I is arranged at the upper end of the axis, a support II is arranged at the side end thereof, screw holes are arranged in the support I and the support II, the lower end of the reference axis I is screwed into the screw hole of the support I through a threaded head, the axis of the reference axis I is arranged in the vertical direction, the inner side end of the reference axis II is screwed into the screw hole of the support II through a threaded section, the axis of the reference axis II is arranged in the horizontal direction, the reference axis II and the reference axis I are arranged in a cross shape in space, a reference plate I is arranged on the top of the reference axis I, the end face of the reference plate I matches the shape of the head end of the screw tape, and a reference plate II is arranged on the outer side end of the reference axis II, and the reference plate II matches the shape of the tail end of the screw tape;

[0029] i-2) Place the head end of the screw tape on reference plate I and the tail end on reference plate II. If the head end of the screw tape contacts the surface of reference plate I and the tail end contacts the surface of reference plate II, the screw tape passes the inspection. If the head end of the screw tape does not contact the surface of reference plate I and / or the tail end does not contact the surface of reference plate II, repeat steps e) to g).

[0030] Furthermore, if the screw tape passes the inspection, the two ends of the screw tape are cut according to the required length of the screw tape to make the cut surfaces flush, and the positioning holes are marked on the screw tape.

[0031] The beneficial effects of the present invention are as follows: the upper positioning plate is marked on the cylinder according to the forming size and spacing of the screw ribbon, and the upper positioning plate is fixed along the vertical direction of the screw ribbon forming. The reference screw ribbon is fixed to the upper positioning plate according to the standard pitch requirements to ensure that the reference screw ribbon is tightly fitted to the upper positioning plate. From bottom to top, a screw ribbon pressing device is used to tightly fit the steel sheet to the reference screw ribbon, and the gap must not exceed 0.5mm. After the gap is measured and qualified, the screw ribbon semi-finished product can be obtained. With the screw ribbon pressing tooling, one person can complete the pressing of the screw ribbon, the pressing efficiency is high, and the forming effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of the spiral ribbon of the present invention when it is pressed;

[0033] Figure 2 It is a schematic diagram of the structure of the spiral ribbon of the present invention when it is heated;

[0034] Figure 3 It is a schematic diagram of the main structure of the spiral belt inspection of the present invention;

[0035] Figure 4 It is a side view structural schematic diagram of the spiral ribbon inspection of the present invention;

[0036] In the figure, 1. base 2. cylinder 3. upper positioning plate 4. reference screw 5. lower positioning plate 6. jack 7. support seat 8. collecting pipe 9. nozzle 10. pipe joint 11. supporting angle steel 12. U-bolt 13. screw 14. shaft 15. support I 16. reference shaft I 17. reference plate I 18. support II 19. reference shaft II 20. reference plate II. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1 To Attachment Figure 4 The present invention is further described.

[0038] A method for manufacturing a spiral ribbon of a stirring device comprises the following steps:

[0039] a) The cylinder 2 is welded and fixed on the base 1 , the axis of the cylinder 2 is arranged in the vertical direction, and the diameter of the cylinder 2 matches the inner diameter of the spiral belt 13 .

[0040] b) Several upper positioning plates 3 are welded and fixed on the outer wall of the cylinder 2 in the circumferential direction. The upper positioning plates 3 are arranged in the vertical direction and are arranged in a spiral pattern. A reference spiral ribbon 4 is installed at the lower end of each upper positioning plate 3. The lower end surface of the reference spiral ribbon 4 matches the curvature of the upper end surface of the spiral ribbon 13. The upper positioning plate is a permanent positioning plate. After being welded to the cylinder 2, it serves as the axial reference for the drawing of the spiral ribbon. The reference spiral ribbon 4 is a formed spiral ribbon, and its forming size is consistent with the size of the spiral ribbon to be pressed, which is used to ensure the quality of the spiral ribbon forming and ensure the smooth transition of the spiral ribbon.

[0041] c) A plurality of support seats 7 are fixed on the outer wall of the cylinder 2 by spot welding, and the support seats 7 are arranged at intervals along the circumferential direction.

[0042] d) Install a screw belt pressing device on the lowermost support seat 7, set a steel sheet at the lower end of the reference screw belt 4, and weld the lower end of the steel sheet to the lower end point of the reference screw belt 4.

[0043] e) The action of the screw belt pressing device pushes the steel sheet upward to deform it until the upper end surface of the steel sheet contacts the lower end surface of the reference screw belt 4, and a lower positioning plate 5 is arranged at the lower end of the deformed steel sheet, and the lower positioning plate 5 is spot welded and fixed to the outer wall of the cylinder 2.

[0044] f) After removing the spiral ribbon pressing device from the support seat 7 at the lower end, move it to the upper end and install it on another support seat 7 adjacent to the support seat 7 at the lower end, and repeat step e).

[0045] g) Repeat step f) until the steel sheet is completely deformed and its upper end surface is in contact with the lower end surface of the reference spiral belt 4, thereby forming the spiral belt 13.

[0046] h) removing the welding spot between the steel sheet and the reference spiral belt, and extracting the manufactured spiral belt 13 from the gap between the reference spiral belt 4 and the lower positioning plate 5.

[0047] First, measure the roundness of the cylinder 2 to ensure that it meets the requirements, and then position the cylinder 1 and weld it firmly to the base 1.

[0048] Mark the upper positioning plate 3 on the cylinder 1 according to the size and spacing of the screw ribbon forming, and fix the upper positioning plate 3 along the vertical direction of the screw ribbon forming. Fix the reference screw ribbon 4 to the upper positioning plate 3 according to the standard pitch requirements to ensure that the reference screw ribbon 4 fits tightly with the upper positioning plate 3. From bottom to top, use the screw ribbon pressing device to fit the steel sheet and the reference screw ribbon 4 tightly, and the gap must not exceed 0.5mm. After measuring the gap and finding it qualified, the semi-finished screw ribbon 13 can be obtained. With the screw ribbon pressing tooling, one person can complete the pressing of the screw ribbon, with high pressing efficiency and good forming effect.

[0049] Furthermore, in step a), the roundness of the cylinder 2 is less than or equal to 2 mm. A radial reference for positioning the spiral ribbon drawing.

[0050] Furthermore, in step d), the screw belt pressing device is a jack 6, and the jack 6 is installed on the corresponding support seat 7 through a threaded fastener. The jack 6 is easy to operate and improves the pressing efficiency of the screw belt 13.

[0051] Furthermore, after step h), the spot welding points of each lower positioning plate 5 and the support seat 7 on the outer wall of the cylinder 2 are removed, and each lower positioning plate 5 and each support seat 7 are removed from the cylinder 2. After the spiral belt 13 is pressed, each lower positioning plate 5 and the support seat 7 are removed for easy use next time.

[0052] Furthermore, after step g), the spiral belt 13 is heated by a flame heating device to eliminate stress. The elastic deformation after pressing is eliminated for shaping, and the size after forming can meet the requirements. The steps of heating the spiral belt 13 by a flame heating device are:

[0053] g-1) Weld several supporting angle steels 11 on the cylinder 2.

[0054] g-2) A manifold 8 is provided at the lower end of the spiral ribbon 13, and the manifold 8 is fixed to the supporting angle steel 11 through a fixing device. A pipe joint 10 is provided at the head end of the manifold 8, and the manifold 8 is connected to an external combustion gas source through the pipe joint 10. The manifold 8 is located below the spiral ribbon 13, and a plurality of nozzles 9 are provided at intervals along the length direction of the manifold 8, and the nozzles 9 are directly opposite to the spiral ribbon 13. The manifold 8 matches the curvature of the formed spiral ribbon 13 to ensure that the heating direction is perpendicular to the spiral ribbon.

[0055] g-3) An external combustion gas source provides fuel gas to the manifold 8, which is burned through the nozzle 9 to heat the spiral ribbon 13. The nozzle 9 is arranged perpendicular to the spiral ribbon 13 so that the spiral ribbon 13 is heated evenly.

[0056] g-4) After the screw belt 13 is heated to eliminate stress, the gas is cut off, the fixing device is loosened to remove the collecting pipe 8 from the supporting angle steel 11, and after the screw belt 13 is fully cooled, the screw belt 13 is pulled out from the gap between the reference screw belt 4 and the lower positioning plate 5.

[0057] Further preferably, the fixing device is a U-bolt 12, and the U-bolt 12 fixes the manifold 8 to the supporting angle steel 11. Fixing the manifold 8 by the U-bolt 12 is easy to operate and improves the efficiency of installing or removing the manifold 8 from the supporting angle steel 11.

[0058] Furthermore, after step h), the method further includes trimming and dimensionally inspecting the spiral belt 13 using a trimming device, thereby achieving the trimming of the spiral belt and the positioning of the spiral belt during the later installation, thereby ensuring the overall assembly effect of the spiral belt.

[0059] The steps of trimming and dimensional inspection of the spiral belt 13 using the trimming device are as follows:

[0060] i-1) A shaft 14 is arranged in the horizontal direction, a support Ⅰ 15 is arranged at the upper end of the shaft 14, and a support Ⅱ 18 is arranged at the side end thereof, screw holes are arranged in the support Ⅰ 15 and the support Ⅱ 18, the lower end of the reference shaft Ⅰ 16 is screwed into the screw hole of the support Ⅰ 15 through a threaded head, the axis of the reference shaft Ⅰ 16 is arranged in the vertical direction, the inner side end of the reference shaft Ⅱ 19 is screwed into the screw hole of the support Ⅱ 18 through a threaded section, the axis of the reference shaft Ⅱ 19 is arranged in the horizontal direction, the reference shaft Ⅱ 19 and the reference shaft Ⅰ 16 are arranged in a cross shape in space, a reference plate Ⅰ 17 is arranged on the top of the reference shaft Ⅰ 16, the end face of the reference plate Ⅰ 17 matches the shape of the head end of the screw belt 13, and a reference plate Ⅱ 20 is arranged on the outer end of the reference shaft Ⅱ 19, and the reference plate Ⅱ 20 matches the shape of the tail end of the screw belt 13.

[0061] i-2) Place the head end of the screw ribbon 13 on the reference plate I 17 and the tail end on the reference plate II 20. If the head end of the screw ribbon 13 is in surface contact with the reference plate I 17 and the tail end is in surface contact with the reference plate II 20, the screw ribbon 13 passes the inspection. If the head end of the screw ribbon 13 is not in surface contact with the reference plate I 17 and / or the tail end is not in surface contact with the reference plate II 20, repeat steps e) to g).

[0062] Furthermore, if the screw tape 13 passes the inspection, the two ends of the screw tape are cut according to the required length of the screw tape to make the cut surfaces flush, and positioning holes are marked on the screw tape 13 to facilitate later assembly.

[0063] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for making a spiral ribbon of a stirring device, characterized in that: The steps include: a) welding a fixed cylinder (2) on the base (1), wherein the axis of the cylinder (2) is arranged in a vertical direction, and the diameter of the cylinder (2) matches the inner diameter of the spiral belt (13); b) welding and fixing a plurality of upper positioning plates (3) on the outer wall of the cylinder (2) in a circumferential direction, the upper positioning plates (3) being arranged in a direction perpendicular to the spiral line and the upper positioning plates (3) being arranged in a spiral shape at intervals, and a reference spiral belt (4) being installed at the lower end of each upper positioning plate (3), and the curvature of the lower end surface of the reference spiral belt (4) matches the curvature of the upper end surface of the spiral belt (13); c) spot welding a plurality of support seats (7) on the outer wall of the cylinder (2), wherein the support seats (7) are arranged at intervals along the circumferential direction; d) installing a screw belt pressing device on the lowermost support seat (7), arranging a steel sheet at the lower end of the reference screw belt (4), and welding the lower end of the steel sheet to the lower end of the reference screw belt (4); e) The spiral belt pressing device moves the steel sheet upward to deform it until the upper end surface of the steel sheet contacts the lower end surface of the reference spiral belt (4), and a lower positioning plate (5) is arranged at the lower end of the deformed steel sheet, and the lower positioning plate (5) is fixed to the outer wall of the cylinder (2) by spot welding; f) after removing the spiral ribbon pressing device from the support seat (7) at the lower end, moving it upward and installing it on another support seat (7) adjacent to the support seat (7) at the lower end, and repeating step e); g) Repeating step f) until the steel sheet is completely deformed and its upper end surface is in contact with the lower end surface of the reference spiral belt (4), thereby forming a spiral belt (13); h) removing the welding point between the steel sheet and the reference spiral belt, and extracting the manufactured spiral belt (13) from the gap between the reference spiral belt (4) and the lower positioning plate (5); The method further comprises, after step h), using a trimming device to trim and inspect the size of the spiral ribbon (13); The steps of trimming and dimensional inspection of the spiral belt (13) using the trimming device are as follows: i-1) A shaft (14) is arranged in the horizontal direction, a support I (15) is arranged at the upper end of the shaft (14), a support II (18) is arranged at the side end thereof, screw holes are arranged in the support I (15) and the support II (18), the lower end of the reference shaft I (16) is screwed into the screw hole of the support I (15) through a threaded head, the axis of the reference shaft I (16) is arranged in the vertical direction, and the inner side end of the reference shaft II (19) is screwed into the screw hole of the support II (18) through a threaded section. In the hole, the axis of the reference axis II (19) is arranged in the horizontal direction, the reference axis II (19) and the reference axis I (16) are arranged in a cross shape in space, a reference plate I (17) is arranged on the top of the reference axis I (16), the end surface of the reference plate I (17) matches the shape of the head end of the spiral belt (13), and a reference plate II (20) is arranged on the outer end of the reference axis II (19), and the reference plate II (20) matches the shape of the tail end of the spiral belt (13); i-2) The head end of the screw ribbon (13) is placed on the reference plate I (17), and the tail end thereof is placed on the reference plate II (20). If the head end of the screw ribbon (13) is in surface contact with the reference plate I (17) and the tail end thereof is in surface contact with the reference plate II (20), the screw ribbon (13) passes the inspection. If the head end of the screw ribbon (13) is not in surface contact with the reference plate I (17) and / or the tail end thereof is not in surface contact with the reference plate II (20), repeat steps e) to g).

2. The method for making a spiral ribbon of a stirring device according to claim 1, characterized in that: In step a), the roundness of the cylinder (2) is less than or equal to 2 mm.

3. The method for making a spiral ribbon of a stirring device according to claim 1, characterized in that: In step d), the screw belt pressing device is a jack (6), and the jack (6) is installed on the corresponding support seat (7) through a threaded fastener.

4. The method for making a spiral ribbon of a stirring device according to claim 1, characterized in that: The method further comprises, after step h), removing the spot welding points of each lower positioning plate (5) and each supporting seat (7) on the outer wall of the cylinder (2), and removing each lower positioning plate (5) and each supporting seat (7) from the cylinder (2).

5. The method for making a spiral ribbon of a stirring device according to claim 1, characterized in that: The method also includes heating the spiral belt (13) using a flame heating device after step g) to eliminate stress.

6. The method for making a spiral ribbon of a stirring device according to claim 5, characterized in that: The steps of heating the spiral ribbon (13) by using a flame heating device are as follows: g-1) welding a plurality of supporting angle steels (11) onto the cylinder (2); g-2) a manifold (8) is arranged at the lower end of the spiral ribbon (13), the manifold (8) is fixed to the supporting angle steel (11) by a fixing device, a pipe joint (10) is arranged at the head end of the manifold (8), the manifold (8) is connected to an external combustion gas source through the pipe joint (10), the manifold (8) is located below the spiral ribbon (13), and a plurality of nozzles (9) are arranged at intervals along the length direction of the manifold (8), and the nozzles (9) are directly opposite to the spiral ribbon (13); g-3) an external combustion gas source provides fuel gas to the manifold (8), which is burned through the nozzle (9) to heat the spiral ribbon (13); g-4) After the screw belt (13) is heated to eliminate stress, the gas is cut off and the screw belt (13) is pulled out from the gap between the reference screw belt (4) and the lower positioning plate (5). The fixing device is loosened and the manifold (8) is removed from the supporting angle steel (11).

7. The method for making a spiral ribbon of a stirring device according to claim 6, characterized in that: The fixing device is a U-shaped bolt (12), and the U-shaped bolt (12) fixes the manifold (8) to the supporting angle steel (11).

8. The method for making a spiral ribbon of a stirring device according to claim 1, characterized in that: If the screw tape (13) passes the inspection, the two ends of the screw tape are cut according to the required length of the screw tape so that the cut surfaces are flush, and positioning holes are marked on the screw tape (13).

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