Helical blade manufacturing mold of large 2205 / 2507 duplex stainless steel static mixer

Abstract

A spiral blade manufacturing die of a large 2205 / 2507 duplex stainless steel static mixer can effectively solve the problems of manufacturing spiral blades, improving product quality and prolonging service life, and comprises an upper positioning plate, a lower positioning plate, an upper mould and a lower mould, the upper positioning plate and the upper mould are welded together, and the lower mould and the lower positioning plate are welded together. The upper positioning plate and the lower positioning plate are rectangular, the upper tire and the lower tire are solid bodies integrally made of 2205 / 2507 duplex stainless steel, the corresponding faces of the upper tire and the lower tire are horizontally inward, the left and right heights of the upper tire and the lower tire change in a gradient arc shape, the torsion angles of the upper tire and the lower tire intersect in a positive and negative perpendicular mode, the left and right spiral angles are equal, and the curvature radius of the lower surface of the upper tire is the same as that of the upper surface of the lower tire. And vertically matching. The blade is novel and unique in structure, scientific and reasonable in design, easy to produce, convenient to use, good in effect, large in pressure resistance, suitable for batch production and remarkable in economic and social benefits, and it is guaranteed that the blade torsion angle and boundary dimension errors meet the design requirements.

Description

Technical Field

[0001] The utility model relates to mechanical manufacturing, in particular to a spiral blade manufacturing mould of a large 2205 / 2507 duplex stainless steel static mixer used in an alumina high-efficiency thickener. Background Art

[0002] Static mixer is a key supporting equipment of the feeding system of alumina high-efficiency thickener. It uses multiple mixing spiral unit blades fixed in the pipe and arranged at a certain angle to change the flow state of the material in the pipe, so as to achieve the purpose of good dispersion and sufficient mixing of the feed slurry. It is called a "static" mixer because there are no moving parts in the pipeline, only static elements. The spiral unit blades are key components in the static mixer. When working, the spiral unit blades will be impacted by the slurry and are vulnerable parts. Their quality and service life directly affect the use effect and service life of the static mixer. Especially with the continuous improvement of the production capacity of the domestic alumina industry in recent years, the specifications of the sedimentation tank have continued to increase. The feed pipe diameter of the static mixer has increased from DN300 to DN700. Especially when the pipe diameter is DN700, the quality requirements of its blades are higher. In conventional blade production, manual sheet metal is used. The torsion angle of the spiral unit blades does not meet the design requirements, the external dimensions error is large, and there are mechanical knocking pits on the surface, which cannot guarantee the product quality and lead to a short service life. It seriously affects the use effect and service life of the static mixer, and will directly affect the production efficiency and economic benefits of the alumina high-efficiency thickener. Although there is a mold for making spiral unit blades of thickener static mixer (201921334782.7), due to its structural problems, in actual use, when making spiral unit blades for large static mixers with a pipe diameter of DN700, the torsion angle and external dimensions error still do not meet the design requirements, affecting the product quality and service life of the static mixer, and directly affecting the production efficiency of the thickener. Therefore, how to make spiral blades for large 2205 / 2507 duplex stainless steel static mixers is a technical problem that needs to be solved urgently. Utility Model Content

[0003] In view of the above situation, in order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a spiral blade manufacturing mold for a large 2205 / 2507 duplex stainless steel static mixer, which can effectively solve the problem of spiral blade manufacturing and improve product quality and service life.

[0004] The technical solution solved by the utility model is a spiral blade manufacturing mold for a large 2205 / 2507 duplex stainless steel static mixer, the mold comprising an upper positioning plate, a lower positioning plate, an upper tire and a lower tire, the lower plane of the upper positioning plate is welded together with the upper plane of the upper tire, and the lower plane of the lower tire is welded together with the upper plane of the lower positioning plate, and is characterized in that the upper positioning plate and the lower positioning plate are symmetrical rectangles made of 2205 / 2507 duplex stainless steel, the upper tire and the lower tire are both solid bodies made of 2205 / 2507 duplex stainless steel, the corresponding side of the upper tire is horizontally inward, the left and right heights change in a gradient arc shape, the torsion angle is vertically crossed in both directions, and the left and right spiral angles are equal, the lower surface of the upper tire and the upper surface of the lower tire have the same curvature radius, and the upper and lower surfaces are matched to form a mold structure for pressing SK type spiral blades.

[0005] The utility model has a novel and unique structure, a scientific and reasonable design, is easy to produce, easy to use, has a good effect, and is resistant to high pressure. It can effectively ensure that the torsion angle and the outer dimension error of the blades meet the design requirements, ensure the quality and service life of the spiral blades, improve the working efficiency of the static mixer, greatly reduce the work intensity of workers, and is suitable for mass production. It is an innovation in the manufacturing equipment of spiral blades for static mixers and has significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is a three-dimensional diagram of the pressing jig of the present invention pressed on the blade-making steel plate (the dotted line portion is the blade placement position). DETAILED DESCRIPTION

[0007] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings and specific circumstances.

[0008] The technical solution solved by the utility model is a spiral blade manufacturing mold for a large 2205 / 2507 duplex stainless steel static mixer, the mold comprising an upper positioning plate 1, a lower positioning plate 2, an upper tire 3 and a lower tire 4, the lower plane of the upper positioning plate 1 is welded to the upper plane of the upper tire 3, and the lower plane of the lower tire 4 is welded to the upper plane of the lower positioning plate 2, and is characterized in that the upper positioning plate 1 and the lower positioning plate 2 are symmetrical rectangles made of 2205 / 2507 duplex stainless steel, the upper tire 3 and the lower tire 4 are both solid bodies made of 2205 / 2507 duplex stainless steel, the corresponding side of the upper tire 3 and the lower tire 4 is horizontally inward, the left and right heights change in a gradient arc shape, the torsion angles are vertically crossed in both directions, and the left and right spiral angles are equal, the lower surface of the upper tire 3 and the upper surface of the lower tire 4 have the same curvature radius, and are matched up and down to form a mold structure for pressing SK type spiral blades.

[0009] The upper tires 3 and the lower tires 4 are provided with two sets in counterclockwise direction and two sets in clockwise direction to meet the requirements of manufacturing SK type spiral blades.

[0010] The height between the upper positioning plate 1 and the lower positioning plate 2 is H, the height of the left side of the lower tire steel plate is A and the right side is B, the height of the left side of the upper tire steel plate is C and the right side is D, and the thickness of the steel plate is N. The sum of A, C, and N is equal to the height H between the upper and lower positioning plates, and the sum of B, D, and N is equal to the height H between the upper and lower positioning plates; when the horizontal thickness of the right-hand rotation increases, A gradually increases and B gradually decreases, correspondingly C decreases and B increases, and the opposite is true for the left-hand rotation (see Figure 1 to ensure the matching of the blades.

[0011] The upper plane of the upper tire 3 and the lower plane of the lower tire 4 are both symmetrical rectangles, the length and width of which are smaller than the length and width of the upper positioning plate 1 and the lower positioning plate 2, and are preferably matched with the upper positioning plate 1 and the lower positioning plate 2 (see Figure 1 shown).

[0012] The centers of the upper tire 3 and the lower tire 4 are on the same vertical line as the centers of the upper positioning plate 1 and the lower positioning plate 2, so that the force is evenly applied when the force center is pressed, thereby ensuring product quality.

[0013] During the specific production, the upper tire 3 and the lower tire 4 can be made of 2205 / 2507 duplex stainless steel cast in a mold to form an integrally formed solid structure, which greatly increases the pressure resistance and prevents the mold from deforming, ensuring that the torsion angle and external dimension error of the pressed blade meet the design requirements.

[0014] When using the present invention, the upper tire 3 is welded to the upper positioning plate 1, which is then fixed to the press arm via a rigid connection. The lower tire 4 is welded to the lower positioning plate 2 and fixed to the press platform to ensure the positioning of the upper and lower molds. The 2205 / 2507 duplex stainless steel plate (hereinafter referred to as the steel plate) used to make the SK-type spiral blade is then placed in the gap between the upper tire 3 and the lower tire 4. The spiral blade steel plate is placed on the lower tire 4, and the upper tire 3 is pressed against the steel plate. The press is started and pressed, ensuring that the longitudinal offset of the pressing center is ≤2mm. The 2205 / 2507 duplex stainless steel plate is pressed into the SK-type spiral blade. The press arm is released, and the SK-type spiral blade is removed.

[0015] The utility model has a novel and unique structure, a scientific and reasonable design, is easy to produce and prepare, and the standardized production saves manpower and material resources and improves work efficiency. In particular, the upper and lower molds are integrated into a solid structure, the mold is pressure-resistant, and has a long service life, which ensures the quality of the pressed products and increases the service life of the products by more than two times. The utility model can be used for the production of spiral blades (units) of different specifications, realizing batch and rapid industrial production, which can greatly save costs and effectively improve production efficiency. Field trials and tests have shown that the cost can be saved by more than 40%, and the production efficiency can be increased by 2-3 times. It is an innovation in the large stainless steel static mixer in the thickener series, and has huge economic and social benefits.

Claims

1. A mold for manufacturing spiral blades of a large 2205 / 2507 duplex stainless steel static mixer, the mold comprising an upper positioning plate (1), a lower positioning plate (2), an upper tire (3) and a lower tire (4), the lower plane of the upper positioning plate (1) being welded to the upper plane of the upper tire (3), and the lower plane of the lower tire (4) being welded to the upper plane of the lower positioning plate (2), characterized in that: The upper positioning plate (1) and the lower positioning plate (2) are symmetrical rectangles made of 2205 / 2507 duplex stainless steel. The upper tire (3) and the lower tire (4) are both solid bodies made of 2205 / 2507 duplex stainless steel. The corresponding side of the upper tire (3) and the lower tire (4) is horizontally inward, and the left and right heights change in a gradient arc shape. The torsion angles are vertically crossed in both directions, and the left and right spiral angles are equal. The lower surface of the upper tire (3) and the upper surface of the lower tire (4) have the same curvature radius, and are matched up and down to form a mold structure for pressing SK-type spiral blades.

2. The spiral blade manufacturing mold for the large-scale 2205 / 2507 duplex stainless steel static mixer according to claim 1, characterized in that: The upper tire (3) and the lower tire (4) each have two sets in counterclockwise direction and two sets in clockwise direction to meet the needs of manufacturing SK type spiral blades.

3. The spiral blade manufacturing mold for the large-scale 2205 / 2507 duplex stainless steel static mixer according to claim 1, characterized in that: The height between the upper positioning plate (1) and the lower positioning plate (2) is H, the height of the left side of the lower tire steel plate is A and the right side is B, the height of the left side of the upper tire steel plate is C and the right side is D, and the thickness of the steel plate is N. Then the sum of A, C, and N is equal to the height H between the upper and lower positioning plates, and the sum of B, D, and N is equal to the height H between the upper and lower positioning plates; when the horizontal thickness of the right-hand rotation increases, A gradually increases and B gradually decreases, and accordingly C decreases and B increases. The opposite is true for the left-hand rotation, so as to ensure the matching of the blades.

4. The spiral blade manufacturing mold for a large-scale 2205 / 2507 duplex stainless steel static mixer according to claim 1, characterized in that: The upper plane of the upper tire (3) and the lower plane of the lower tire (4) are both symmetrical rectangles, and their length and width are smaller than the length and width of the upper positioning plate (1) and the lower positioning plate (2), and are preferably matched with the upper positioning plate (1) and the lower positioning plate (2).

5. The spiral blade manufacturing mold for a large-scale 2205 / 2507 duplex stainless steel static mixer according to claim 1, characterized in that: The centers of the upper tire (3) and the lower tire (4) are on the same vertical line as the centers of the upper positioning plate (1) and the lower positioning plate (2), so that the force is evenly applied when the force center is pressed, thereby ensuring product quality.

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