CN211302702U

CN211302702U - Continuous helical blade

Info

Publication number: CN211302702U
Application number: CN201921032181.0U
Authority: CN
Inventors: 邹慧明
Original assignee: Guangzhou Batong Mixer Co ltd
Current assignee: Guangzhou Batong Mixer Co ltd
Priority date: 2019-07-03
Filing date: 2019-07-03
Publication date: 2020-08-21
Anticipated expiration: 2029-07-03

Abstract

The utility model discloses a continuous type helical blade belongs to static mixer accessory field, including the long banding sheet steel of a slice be formed with the flight of two at least end to end along length direction on the sheet steel, the turning to of two adjacent flights is opposite, accepts for the rotation between two flights that meet. The utility model discloses a continuous helical blade twists into two at least flights by monolithic steel sheet, and need not extra adjustment, welding operation, also can not waste too many leftover bits, makes helical blade's processing more convenient from this, reduces cost of labor and material.

Description

Continuous helical blade

Technical Field

The utility model relates to a static mixer field especially relates to a continuous type helical blade.

Background

An SK type static mixer with a spiral mixing inner core structure (JB/T7660-. The mixing inner core structure of the static mixer is formed by connecting left and right twisted spiral sheets in series. The processing process of the mixing inner core of the mixer made of stainless steel materials is characterized in that 180-degree twisted spiral sheets are mutually crossed, serially connected, welded and fixed to form a whole cylindrical mixing inner core, and then the whole mixing inner core is arranged in a stainless steel outer casing pipe to form a complete static mixer.

The mixing core of the static mixer is a 180-degree twisted helical blade, and as shown in figure 1, the current processing technology mainly comprises three steps: stainless steel sheet-stamping-cutting off the scrap, thus producing individual twisted helical pieces. After the spiral sheets are twisted, each spiral blade is positioned by a special tool and is connected in series and butted in sequence, and then the spiral blades are welded and fixed by a welding technician. The process has two procedures, namely butt joint positioning and welding fixing. 1. And in the butt joint positioning process, the positioning is required to be accurate. If the positioning is not correct, radial deviation of the spiral sheet is generated, so that the roundness of the whole mixture is not good enough, and the subsequent installation into a shell pipe causes difficulty and even rework; 2. the welding fixing process requires skilled welding technicians, and simultaneously requires wire filling surfacing welding in four directions of cross butt joints, so that welding needs to be firm. Due to the abnormal shape of the spiral sheet, the welding point position is influenced by the torsion of the spiral sheet, and the welding work is difficult to operate due to the narrow welding space. The welding process has the disadvantages that the welding process needs to be carried out in four directions, and the welding process needs to be carried out only by adjusting the direction of the whole inner core four times, so the welding process is difficult and time-consuming.

Firstly, after the welding process is carried out at high temperature, the workpiece is expanded with heat and contracted with cold, so that the whole inner core after welding is deformed in different degrees, and the whole inner core must be corrected again; secondly, the surface of the stainless steel material at the welding point is oxidized and blackened inevitably in the welding process, which is commonly called as welding spots. The treatment of the welding spots is also a necessary process, and under the condition of high requirements on the surface polishing of the mixed inner core, the treatment of the welding spots needs to go through a plurality of processes and multiple operation treatments, such as chemical passivation, sanding, mechanical polishing and the like, to achieve the expected effect. The actual work of spot welding often is very inconvenient due to the flight obstruction around the weld.

In addition, the spiral sheet is formed by independent punching, twisting and processing, the two ends of the forming process necessarily need materials with certain length to be used as clamping positions, the materials at the clamping positions at the two ends need to be cut off in the later period to become waste materials, and therefore certain material waste is necessarily caused, and according to the traditional processing calculation, the waste material rate of different sizes according to the specification accounts for 50% -20% of the total consumable material. The waste rate of the material is extremely high.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a continuous type helical blade, its simple process, need not the welding, the consumptive material is few.

The utility model adopts the technical proposal that:

a continuous helical blade comprises a long thin steel plate, at least two helical sheets connected end to end are formed on the thin steel plate along the length direction, the rotation directions of two adjacent helical sheets are opposite, and the two adjacent helical sheets are rotatably connected.

As a further improvement of the utility model, the axes of the spiral pieces are overlapped.

As a further improvement of the utility model, the steel sheet is provided with a receiving part which connects two connected spiral sheets, and the receiving part is provided with an open slot.

As a further improvement of the utility model, the open slots are arranged at both sides of the width direction of the thin steel plate, and the bearing parts are flaky and are positioned between the two symmetrical open slots.

As a further improvement of the utility model, the bearing part is provided with a crack-stopping groove.

As a further improvement, the crack arrest groove is arranged at both ends of the bearing part and is located at both sides of the torsion shaft of the adjacent spiral piece, and the length direction of the crack arrest groove is parallel to the torsion shaft.

As a further improvement of the utility model, the torsion angle between the two connected spiral sheets is 90 degrees.

The utility model has the advantages that: the utility model discloses a continuous helical blade twists into two at least flights by monolithic steel sheet, and need not extra adjustment, welding operation, also can not waste too many leftover bits, makes the processing of integral blade more convenient from this, reduces cost of labor and material.

Drawings

The present invention will be further described with reference to the accompanying drawings and embodiments.

FIG. 1 is a schematic view of a conventional spiral hybrid core;

FIG. 2 is a raw material diagram of the continuous helical blade of the present invention;

FIG. 3 is a schematic view of the preliminary processing of the continuous helical blade of the present invention;

FIG. 4 is a schematic view of the processing of the continuous helical blade of the present invention;

fig. 5 is a diagram of the finished product of the continuous helical blade of the present invention.

Detailed Description

The continuous helical blade, which is mainly used as a helical mixing core of a static mixer, especially the core of an SK type static mixer (JB/T7660 and 1995), comprises a single long thin steel plate 1 as shown in FIG. 2. As shown in fig. 3, at least two end-to-end spiral pieces 2, 3 are formed on the thin steel sheet 1 along the length direction, the rotation directions of two adjacent spiral pieces 2, 3 are opposite, for example, the spiral piece 2 is left-handed, and the spiral piece 3 is right-handed. The integrated helical blade can be formed by first twisting the steel sheet 1 to the left to form a first left-handed helical fin 2; then, the thin steel plate 1 is twisted right at the right side of the first left-handed spiral piece 2 to form a first right-handed spiral piece 3 which is connected with the first left-handed spiral piece 2; repeating the above steps if more than two spiral sheets exist; finally, the leftover material of the edge of the non-spiral part is cut off.

In the embodiment, the two connected spiral sheets are rotatably connected, and the two spiral sheets can be twisted relatively according to actual requirements.

The helical blade is formed by a thin steel plate 1 through a physical sheet metal process, any part of the steel plate is not completely cut off, namely, additional alignment and welding processes are not needed, so that the processes are greatly simplified, and the strength of the product is better; in addition, compared with the material loss of the plurality of spiral sheets for welding and fixing, the material loss of cutting off the end parts of the middle spiral sheets is saved, and external welding materials are not required to be added, so that the material cost is greatly saved.

More preferably, the axes of the respective flights coincide.

The forming angle of the spiral sheet can be set according to the mixing requirements of different fluids, the angle range is 90-180 degrees, and generally, when the angle of the spiral sheet is 180 degrees, the mixing effect is more sufficient.

More preferably, referring to fig. 4, the thin steel plate 1 is formed with a receiving portion 5 for connecting the two spiral pieces 2 and 3 which are in contact with each other, and the receiving portion 5 can be regarded as a part of each of the two spiral pieces 2 and 3. When the continuous helical blade is formed, because the two helical blades 2 and 3 which are connected are in torsional bearing, which are two opposite forming directions, the bearing part is easy to generate large deformation, and therefore, an open slot 4 is arranged at the bearing part 5. The open slot 4 can locally cut off the direct connection between the adjacent spiral pieces 2 and 3, when the adjacent spiral pieces 2 and 3 are twisted, the deformation caused by the mutual pulling can be reduced, and the bearing part 5 is used as a buffer position between the two spiral pieces 2 and 3.

More preferably, the open grooves 4 are provided on both sides of the thin steel plate 1 in the width direction, and the receiving portions 5 are formed in a sheet shape and are located between the two symmetrical open grooves 4. The symmetrical open slot 4 design can effectively reduce the stress generated during twisting, so that the spiral sheets 2 and 3 are not deformed.

When the left-handed helical blades 2 and 3 and the right-handed helical blades 2 and 3 are twisted at a large angle, in order to reduce the torsional stress and prevent the connecting part from tearing, a crack-stopping groove is also arranged at the bearing part 5. The crack arrest grooves are arranged at two ends of the bearing part 5 and are positioned at two sides of the torsion shafts of the adjacent spiral pieces 2 and 3, and the length direction of the crack arrest grooves is parallel to the torsion shafts.

More preferably, as shown in fig. 5, the torsion angle between the two adjacent spiral pieces is 90 degrees, and when the torsion angle between the two adjacent spiral pieces is 90 degrees, the fluid mixing is performed with a good effect.

The above description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention.

Claims

1. A continuous helical blade is characterized by comprising a long thin steel plate, wherein at least two helical sheets which are connected end to end are formed on the thin steel plate along the length direction, the rotating directions of two adjacent helical sheets are opposite, and the two adjacent helical sheets are rotatably connected.

2. The continuous helical blade of claim 1, wherein: the axes of the spiral pieces are overlapped.

3. The continuous helical blade of claim 1, wherein: the steel sheet is provided with a bearing part for connecting the two connected spiral sheets, and the bearing part is provided with an open slot.

4. The continuous helical blade of claim 3, wherein: the open slots are arranged on two sides of the thin steel plate in the width direction, and the bearing part is flaky and is positioned between the two symmetrical open slots.

5. The continuous helical blade of claim 3 or 4, wherein: the bearing part is provided with a crack-stopping groove.

6. The continuous helical blade of claim 5, wherein: the crack arrest grooves are arranged at two ends of the bearing part and are positioned at two sides of the torsion shaft of the adjacent spiral piece, and the length direction of the crack arrest grooves is parallel to the torsion shaft.

7. A continuous helical blade as claimed in any one of claims 1 to 4, wherein: the torsion angle between two connected spiral sheets is 90 degrees.