Low-resistance powder concentrator shell welding tool

Abstract

This utility model belongs to the technical field of welding fixtures for air classifiers, and particularly relates to a welding fixture for the housing of a low-resistance air classifier. The welding fixture for the housing of a low-resistance air classifier includes a lower positioning plate, with a lower positioning ring fixedly connected to the upper end face of the lower positioning plate. A lower flange is fitted onto the lower positioning ring to position a lower cone. Multiple columns are fixedly connected to the lower positioning plate, and an inner support positioning component is horizontally arranged on each column. The inner support positioning component abuts against the inner side of the connecting body to position the connecting body. An upper positioning plate is horizontally fixedly connected to the upper end of each column, with an upper positioning ring arranged on the upper positioning plate. An upper flange is fitted onto the upper positioning ring to position an upper cone. This utility model can improve the welding quality, welding efficiency, and production safety of the low-resistance air classifier housing.

Description

Technical Field

[0001] This utility model belongs to the technical field of welding fixtures for air classifiers, and particularly relates to a welding fixture for the housing of a low-resistance air classifier. Background Technology

[0002] The pendulum mill, a traditional powder processing equipment, is widely used in industries such as metallurgy, building materials, chemicals, mining, highway construction, and water conservancy and hydropower for crushing and grinding mineral materials. The classifier, as an important powder screening and grading device in the pendulum mill system, mainly relies on the forced vortex formed by the high-speed rotation of the rotor to classify powders. Within the classification zone formed by the lower shell and the rotor, under the action of the forced vortex, powders that meet the fineness requirements are collected by the collector as finished products, while powders that do not meet the fineness requirements fall back into the main grinding chamber for regrinding along the wall of the classifier shell.

[0003] See Figure 5 As shown, this is a novel low-resistance air classifier housing 1, which includes an upper cone 11 located above and a lower cone 12 located below. An arc-shaped connecting body 13 is welded between the upper cone 11 and the lower cone 12, fixing the upper cone 11 and the lower cone 12 together. Furthermore, an upper flange 14 is welded to the upper end face of the upper cone 11, and a lower flange 15 is welded to the lower end face of the lower cone 12. An upper flange through hole 141 is provided on the upper flange 14, and a lower flange through hole 151 is provided on the lower flange 15. By setting the connecting body 13, the internal cross-sectional area change rate of the air classifier is continuously stable. During operation, the airflow velocity and pressure do not change suddenly, reducing turbulence generation and effectively lowering the air classifier resistance, thereby improving the classification accuracy and efficiency of the air classifier.

[0004] Therefore, the welding quality between the connecting body 13 and the upper cone 11 and lower cone 12 directly affects the resistance and classification efficiency of the air classifier. Existing methods for assembling and welding the connecting body 13 with the upper cone 11 and lower cone 12 generally involve placing the lower cone 12 on a flat surface, using a crane to sequentially lift and assemble the connecting body 13 and upper cone 11, and then performing the assembly welding. This process suffers from technical problems such as unstable welding quality, time-consuming and labor-intensive assembly, and the potential for personnel injury. Therefore, designing an assembly welding fixture for the low-resistance air classifier shell is crucial for ensuring the welding quality of the low-resistance air classifier shell, improving welding efficiency, and ensuring safe production. Utility Model Content

[0005] To address the technical problems existing in the prior art, this application provides a welding fixture for a low-resistance air classifier housing that can improve the welding quality, welding efficiency, and production safety.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A welding fixture for a low-resistance air classifier housing includes a lower positioning plate, a lower positioning ring fixedly connected to the upper end face of the lower positioning plate, and a lower flange sleeved on the lower positioning ring to position a lower cone; multiple columns fixedly connected to the lower positioning plate, and an inner support positioning component horizontally arranged on each column, the inner support positioning component abutting against the inner side of the connecting body to position the connecting body; an upper positioning plate horizontally fixedly connected to the upper end of the columns, an upper positioning ring arranged on the upper positioning plate, and an upper flange sleeved on the upper positioning ring to position an upper cone.

[0007] Preferably, the internal support positioning assembly includes an adjusting sleeve horizontally fixedly connected to the column, an adjusting screw threadedly connected at one end to the adjusting sleeve, and the other end of the adjusting screw rotatably passing through an adjusting block. The outer surface of the adjusting block is an arc-shaped surface that matches the inner surface of the connecting body. Rotating the adjusting screw can drive the outer surface of the adjusting block to abut against the inner surface of the connecting body.

[0008] Preferably, an adjusting seat is fixedly connected to the end of the adjusting sleeve away from the adjusting block, and the adjusting seat is fixedly connected to the column.

[0009] Preferably, an adjustment through hole is provided on the adjustment screw between the adjustment sleeve and the adjustment block, and the adjustment rod can be inserted into the adjustment through hole to drive the adjustment screw to rotate.

[0010] Preferably, the adjusting rod is detachably inserted into the adjusting through hole.

[0011] Preferably, multiple support ribs are evenly and fixedly connected to the upper end face of the lower positioning plate outside the lower positioning ring. The inner side of the support ribs is an inclined surface that matches the taper of the lower cone. When the lower flange is sleeved on the lower positioning ring, the outer side of the lower cone abuts against the support ribs.

[0012] Preferably, a lifting lug is fixedly connected to the upper positioning plate inside the upper positioning ring.

[0013] Preferably, multiple weight-reducing slots are provided on the upper positioning plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention achieves positioning of the lower cone by setting a lower positioning plate and a lower positioning ring; positioning of the connecting body by setting an internal support positioning component; and positioning of the upper cone by setting an upper positioning plate and an upper positioning ring. Therefore, this invention allows for rapid assembly of the connecting body with the upper and lower cones, facilitating the assembly and welding of the low-resistance classifier housing for pendulum mills. This improves assembly and welding quality, increases welding efficiency, and reduces the risk of injury to personnel.

[0015] By setting an internal support positioning assembly including an adjusting sleeve, an adjusting screw, and an adjusting block that matches the connector, it is easy to drive the adjusting block to press against the inner arc surface of the connector by rotating the adjusting screw, so as to quickly position the connector by adjusting the adjusting block.

[0016] By setting up supporting ribs, the lower cone is not only supported, but also further positioned radially. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model.

[0018] Figure 2 This is a schematic diagram of the orthographic projection structure of an embodiment of the present utility model.

[0019] Figure 3 for Figure 2 A cross-sectional view of the internal support positioning component.

[0020] Figure 4 This is a schematic diagram of the structure of the classifier housing during positioning according to an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the structure of the air classifier housing for positioning using this utility model.

[0022] In the diagram: 1. Air classifier housing; 11. Upper cone; 12. Lower cone; 13. Connecting body; 14. Upper flange; 141. Upper flange through hole; 15. Lower flange; 151. Lower flange through hole. 2. Lower positioning plate, 21. Lower positioning ring, 3. Columns, 4. Inner support positioning assembly; 41. Adjusting sleeve; 42. Adjusting screw; 421. Adjusting through hole; 43. Adjusting block; 431. Rotating hole; 44. Adjusting rod; 45. Adjusting seat. 5. Upper positioning plate; 51. Upper positioning ring; 52. Lifting lug; 53. Weight reduction through groove. 6. Supporting stiffeners. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example

[0025] See appendix Figure 1 , 2 As shown in Figure 4, a welding fixture for a low-resistance air classifier housing includes a lower positioning disk 2 with a disc-shaped structure. A lower positioning ring 21 is welded to the upper end face of the lower positioning disk 2, and the lower positioning ring 21 can be coaxially arranged with the lower positioning disk 2. The lower flange through hole 151 on the lower flange 15 is fitted onto the lower positioning ring 21 to achieve positioning of the lower cone 12. Specifically, after the lower cone 12 is positioned, the upper end face (i.e., surface A) of the lower positioning disk 2 axially positions the lower cone 12, and the outer circumference (i.e., surface B) of the lower positioning ring 21 radially positions the lower cone 12.

[0026] Multiple columns 3 are vertically welded onto the lower positioning disk 2 inside the lower positioning ring 21. In this embodiment, four columns 3 are evenly distributed on the same circle formed by the axis of the lower positioning ring 21. An inner support positioning component 4 is horizontally arranged on each column 3. The inner support positioning component 4 can abut against the inner side of the connecting body 13 to achieve positioning of the connecting body 13.

[0027] See Figure 3 As shown, specifically, the inner support positioning assembly 4 includes an adjusting sleeve 41 horizontally fixedly connected to the outer end face of the column 3, an adjusting screw 42 with one end threadedly connected inside the adjusting sleeve 41, and the other end of the adjusting screw 42 rotatably passing through the adjusting block 43. That is, the adjusting sleeve 41 is provided with an internal thread that matches the external thread of the adjusting screw 42, and a rotating hole 431 is opened on the end face of the adjusting screw 42 facing the adjusting sleeve 41, so that the adjusting screw 42 can rotatably pass through the rotating hole 431.

[0028] To ensure that the outer surface of the adjusting block 43 abuts and fits against the inner surface of the connecting body 13, thereby positioning the connecting body 13, the outer surface of the adjusting block 43 is an arc-shaped surface that matches the inner surface of the connecting body 13, i.e., surface C in the attached drawing. Surface C is dimensionally matched with the connecting body 13 to serve as a radial adjustment support surface for the connecting body 13. Specifically, the curvature of surface C of the adjusting block 43 is the same as the curvature of the inner surface of the connecting body 13. Furthermore, to avoid the adjusting block 43 obstructing the upper cone 11 and lower cone 12, the height of the adjusting block 43 is less than the height of the connecting body 13. In addition, the installation height of the adjusting sleeve 41 on the column 3 is also based on the requirement that the C surface of the adjusting block 43 can fit against the inner arc surface of the connecting body 13.

[0029] When a rotation limiting force is applied to the adjusting block 43, such as when the operator controls the adjusting block 43 to not rotate by hand, or when the C-face of the adjusting block 43 has entered the bending range inside the connecting body 13 and cannot rotate around the axis of the rotating hole 431, rotating the adjusting screw 42 can adjust the length of the adjusting bolt 42 entering the adjusting sleeve 41, thereby driving the outer side of the adjusting block 43 to move toward the connecting body 13 to abut against the inner side of the connecting body 13.

[0030] To enable rotation of the adjusting screw 42, in one embodiment, a nut can be coaxially welded onto the adjusting screw 42. Rotating the nut with a wrench will then drive the adjusting screw 42 to rotate. In this embodiment, to facilitate rotation of the adjusting screw 42, an adjusting through hole 421 perpendicular to the axis of the adjusting screw 42 is provided on the adjusting screw 42 between the adjusting sleeve 41 and the adjusting block 43. The adjusting rod 44 can be inserted into the adjusting through hole 421, and rotating the adjusting rod 44 will drive the adjusting screw 42 to rotate. Furthermore, the adjusting rod 44 can be detachably inserted into the adjusting through hole 421.

[0031] To facilitate fixing the adjusting sleeve 41 to the column 3, an adjusting seat 45 is vertically welded to the end of the adjusting sleeve 41 away from the adjusting block 43. Of course, the adjusting seat 45 can also be integrally formed with the adjusting sleeve 41, and the adjusting seat 45 is vertically welded to the outer end face of the column 3.

[0032] A disc-shaped upper positioning plate 5 is horizontally welded to the upper end face of the column 3. An upper positioning ring 51 is welded to the upper positioning plate 5, and the upper positioning ring 51 can be coaxially arranged with the upper positioning plate 5. The upper flange through hole 141 on the upper flange 14 is fitted onto the upper positioning ring 51 to achieve positioning of the upper cone 11. In addition, in order to achieve further positioning of the upper cone 11, the outer circumference of the upper positioning plate 5 is a frustum structure that matches the taper of the upper cone 11. When the upper flange 14 is fitted onto the upper positioning ring 51, the frustum of the outer circumference of the upper positioning plate 5 fits against the inner surface of the upper cone 11. Specifically, after the upper cone 11 is positioned, the upper end face (i.e., surface D) of the upper positioning plate 5 performs axial positioning of the upper cone 11, and the outer circumference (i.e., surface E) of the upper positioning plate 5 performs radial positioning of the upper cone 11.

[0033] Furthermore, in order to facilitate the transfer and lifting of this welding fixture, a plurality of lifting lugs 52 are welded on the upper positioning plate 5 inside the upper positioning ring 51. For example, in this embodiment, a total of four lifting lugs 52 are provided.

[0034] Furthermore, in order to reduce the weight of the upper positioning plate 5, multiple weight-reducing slots 53 are evenly distributed on the upper positioning plate 5. In this embodiment, a total of four weight-reducing slots 53 are provided.

[0035] Furthermore, to further achieve radial positioning of the lower cone 12 and improve the stability of its support, multiple support ribs 6 are evenly welded to the upper end face of the lower positioning disc 2 outside the lower positioning ring 21. In this embodiment, eight support ribs 6 are provided. The inner side of the support ribs 6 is an inclined surface (i.e., F-surface) that matches the taper of the lower cone 12. When the lower flange 15 is fitted onto the lower positioning ring 21, the outer surface of the lower cone 12 abuts against and fits against the F-surface of each support rib 6.

[0036] The working principle and process of this embodiment are as follows: Install the various components of this utility model according to the above instructions, such as... Figure 1 As shown; 1. Positioning of the lower cone 12: The lower flange 15 is welded onto the lower cone 12. Then, the lower flange through hole 151 of the lower flange 15 is fitted onto the outside of the lower positioning ring 21. The A surface of the lower positioning plate 2 abuts against the lower end face of the lower flange 15 to achieve axial positioning of the lower cone 12. The B surface of the lower positioning ring 21 achieves preliminary radial positioning of the lower cone 12. The F surface of the support rib 6 fits against the outer surface of the lower cone 12 to achieve precise radial positioning of the lower cone 12. 2. Positioning of connector 13: The connector 13 is hoisted onto the lower cone 12. At this time, the connector 13 is located outside each adjusting block 43. By rotating the adjusting rod 44, the adjusting screw 42 is driven to rotate, thereby driving the adjusting block 43 to move horizontally toward the connector 13, so that the C-face of the adjusting block 43 abuts against the inner arc surface of the connector 13. The adjusting screws 4 in each direction are finely adjusted to align the connector 13 and the lower cone 12 in the circumferential direction. After that, the connector 13 and the lower cone 12 can be spot welded and circumferentially welded. Then, the adjusting screw 42 is rotated in the opposite direction to move the adjusting block 43 away from the connector 13 until the outer side of the adjusting block 43 is located inside the inner circumference of the lower flange through hole 151. 3. Positioning of the upper cone 11: The upper flange 14 is welded onto the upper cone 11. Then, the upper flange through hole 141 of the upper flange 14 is fitted onto the outside of the upper positioning ring 51. The upper end face (i.e., the D face) of the upper positioning plate 5 abuts against the lower end face of the upper flange 14 to achieve axial positioning of the upper cone 11. The outer circumference of the upper positioning ring 51 achieves preliminary radial positioning of the upper cone 11. The E face of the upper positioning plate 5 fits against the inner side of the upper cone 11 to achieve precise radial positioning of the upper cone 11. Afterward, spot welding and circumferential welding can be performed on the connecting body 13 and the upper cone 11. 4. After welding is completed, the welded classifier housing 1 can be lifted down from the top of this utility model.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for a low-resistance air classifier housing, characterized in that: It includes a lower positioning plate, a lower positioning ring is fixedly connected to the upper end face of the lower positioning plate, and a lower flange is sleeved on the lower positioning ring to achieve positioning of the lower cone; Multiple columns are fixedly connected to the lower positioning plate, and an inner support positioning component is horizontally arranged on each column. The inner support positioning component can abut against the inner side of the connecting body to achieve positioning of the connecting body. An upper positioning plate is horizontally fixedly connected to the upper end of the column, and an upper positioning ring is provided on the upper positioning plate. An upper flange is sleeved on the upper positioning ring to achieve positioning of the upper cone.

2. The welding fixture for a low-resistance air classifier housing according to claim 1, characterized in that: The internal support positioning assembly includes an adjusting sleeve horizontally fixedly connected to the column, an adjusting screw threadedly connected at one end to the adjusting sleeve, and the other end of the adjusting screw rotatably passing through an adjusting block. The outer surface of the adjusting block is an arc-shaped surface that matches the inner surface of the connecting body. Rotating the adjusting screw can drive the outer surface of the adjusting block to abut against the inner surface of the connecting body.

3. The welding fixture for a low-resistance air classifier housing according to claim 2, characterized in that: An adjusting seat is fixedly connected to the end of the adjusting sleeve away from the adjusting block, and the adjusting seat is fixedly connected to the column.

4. The welding fixture for a low-resistance air classifier housing according to claim 2, characterized in that: An adjustment through hole is provided on the adjustment screw between the adjustment sleeve and the adjustment block. The adjustment rod can be inserted into the adjustment through hole and drive the adjustment screw to rotate.

5. The welding fixture for a low-resistance air classifier housing according to claim 4, characterized in that: The adjusting rod is detachably inserted into the adjusting through hole.

6. The welding fixture for a low-resistance air classifier housing according to claim 1, characterized in that: Multiple support ribs are evenly and fixedly connected to the upper end face of the lower positioning plate outside the lower positioning ring. The inner side of the support ribs is an inclined surface that matches the taper of the lower cone. When the lower flange is sleeved on the lower positioning ring, the outer side of the lower cone abuts against the support ribs.

7. The welding fixture for a low-resistance air classifier housing according to claim 1, characterized in that: A lifting lug is fixedly connected to the upper positioning plate inside the upper positioning ring.

8. The welding fixture for a low-resistance air classifier housing according to claim 1, characterized in that: Multiple weight-reducing slots are provided on the upper positioning plate.

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