A frameless closed cylindrical screen

Abstract

This utility model discloses a frameless enclosed cylindrical screen, comprising: a flexible mesh sheet and two flanges, each flange having an annular groove. The two sides of the flexible mesh sheet are respectively wound around the annular grooves of the two flanges by clamping wires, and the two clamping wires are respectively fixedly connected to the two flanges; wherein the flexible mesh sheet connected to the flanges is cylindrical. This utility model has high sorting efficiency, low equipment cost, simple maintenance, and reduces environmental pollution.

Description

Technical Field

[0001] This utility model relates to the technical field of screen forming for powder separators, and in particular to a frameless closed cylindrical screen. Background Technology

[0002] A rotary powder separator, also known as a rotary screen, separates powdery materials into oversize and undersize products using a shaped screen.

[0003] From the pre-Christian era to the 18th century, screening was done manually. Mechanical screening began in the late 18th and 19th centuries, and became widespread in the 20th century with the invention of the electric motor. During operation, the type of screening machine is selected based on the material to be screened. The material is separated into oversize and undersize materials by varying its movement along the screen bed and by other auxiliary conditions such as wind direction and speed.

[0004] With the rapid increase in the global population, the annual increase in grain crop production, and the rapid development of the pharmaceutical, food, and agricultural industries, the screening of large quantities of grains and husk powders has become commonplace. To ensure the quality, yield, and environmental compliance of grain and husk powder screening, rotary screens, linear screens, three-dimensional screens, and electromagnetic pulse screens are widely used due to their environmental friendliness, speed, and efficiency, especially rotary screens, which are showing a year-on-year increase in usage. However, their operating methods and auxiliary processes are still in their initial functional stages, making it difficult to meet the needs of some work scenarios and requiring further improvement.

[0005] In the screening of grains and husk powders, materials often contain many impurities, have a wide range of mesh sizes, and require multiple gradations, necessitating rapid sorting by screening equipment. Currently, rotary screens primarily employ drum screens. Drum screens utilize the rotation of a cylindrical screen body composed of mesh and inner or outer ribs to tumble and scatter the material, thereby separating it into oversize and undersize materials to achieve the desired material selection.

[0006] Rotary drum screens can be broadly categorized into two types: those where the screen and main shaft rotate at the same speed (or without a shaft), and those where the screen remains stationary while the main shaft and accessories rotate at a fixed speed. The first type, rotary drum screens, have slow rotation speeds, low screening accuracy, and large machine size, but can achieve high output requirements. The second type is complex to manufacture because the screen body relies on either an internal or external circular skeleton. With an external circular skeleton, screen replacement requires disassembling all rotating components, which is labor-intensive, time-consuming, and difficult to achieve the desired smooth, taut, and longitudinally taut circular shape of the soft screen. With an internal skeleton, material movement along the screen is slowed by the skeleton due to clogging, limiting output. The main shaft rotation is also affected by the skeleton's resistance, resulting in significant motor power loss. However, this type of screen has a high main shaft speed, can screen high-mesh products, has moderate output, and a compact machine size, facilitating production line layout.

[0007] In summary, existing rotary screen equipment suffers from problems such as excessive material usage, low sorting efficiency, high power loss, and susceptibility to damage, affecting the screening efficiency and quality of grains and husk powder. It is difficult to guarantee the required efficiency for grain and husk powder screening. When a large amount of equipment is invested, the manufacturing and maintenance costs increase significantly, and environmental pollution becomes more severe. Utility Model Content

[0008] In view of the above-mentioned problems of existing rotary screen equipment screens, the aim is to provide a frameless enclosed cylindrical screen that has high sorting efficiency, low equipment cost, simple maintenance, and reduces environmental pollution.

[0009] The specific technical solution is as follows:

[0010] A frameless closed cylindrical screen includes: a flexible mesh sheet and two flanges, each flange having an annular groove. The two sides of the flexible mesh sheet are respectively wound around the annular grooves of the two flanges by clamping wires, and the two clamping wires are respectively fixedly connected to the two flanges.

[0011] The flexible mesh connected to the flange is cylindrical.

[0012] In the aforementioned frameless closed cylindrical screen, rope loops are formed on both sides of the soft mesh, and the two clamping wires pass through the two rope loops respectively.

[0013] In the aforementioned frameless closed cylindrical screen, the two sides of the soft mesh are respectively folded to form the rope loops.

[0014] The aforementioned frameless closed cylindrical screen, wherein each of the clamping wires comprises: two screw rods and a steel wire rope, one end of each screw rod is provided with a countersunk hole, both ends of the steel wire rope are respectively embedded in the countersunk holes of the two screw rods and are respectively fixedly connected to the two screw rods, and the steel wire rope passes through the rope loop.

[0015] In the aforementioned frameless closed cylindrical screen, each of the flanges is provided with at least one ear plate, and the two lead screws of the same clamping wire are fixedly connected to the ear plate by nuts.

[0016] In the aforementioned frameless closed cylindrical screen, each flange is provided with two ear plates, and the two lead screws of the same clamping wire are respectively fixedly connected to the two ear plates by the nuts.

[0017] In the aforementioned frameless closed cylindrical screen, each of the flanges has an outwardly extending convex ring on one side and a backstop ring on the other side, with the convex ring and the backstop ring forming the annular groove.

[0018] In the aforementioned frameless closed cylindrical screen, the ear plate is fixed to the convex ring.

[0019] In the aforementioned frameless closed cylindrical screen, the cross-section of the anti-reverse ring is circular.

[0020] The positive effects of the above technical solution compared with the existing technology are:

[0021] This utility model is simple to manufacture and has low cost. The soft mesh is easy to install and disassemble, reducing maintenance costs. It has a large working area, which increases production capacity. The non-contact skeleton is not easily worn or damaged, which ensures the quality of powder sorting products and reduces environmental pollution. Compared with the traditional drum mesh manufacturing, the production speed is increased by 1 to 2 times.

[0022] The combination of the clamping wire and the rope loop in this invention makes it easy to form a circumferentially closed soft mesh. The fixing and adjustment of the nuts of the clamping wire and the ear plate makes it easy to clamp the soft mesh onto the flange. When the flange moves relative to each other, the anti-reverse ring can block the axial movement of the clamping wire, which makes it easier to tighten the soft mesh. The circular shape of the flange and the anti-reverse ring, as well as the circular cross-sectional shape of the anti-reverse ring, makes it easy to form a cylindrical shape of the soft mesh and reduce wear, thereby improving the service life of the soft mesh.

[0023] The flexible mesh working part of this invention has no internal or external ribs, which reduces wear and tear and solves the problem of short service life of flexible mesh. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a frameless enclosed cylindrical screen according to the present invention;

[0025] Figure 2 This is a schematic diagram of the flange structure in a frameless enclosed cylindrical screen according to the present invention;

[0026] Figure 3 This is a cross-sectional view of the flange in a frameless enclosed cylindrical screen according to the present invention.

[0027] Figure 4 This is a schematic diagram of the structure for tightening and drawing wires in a frameless closed cylindrical screen according to this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the soft mesh and the clamping wire in the frameless closed cylindrical screen of this utility model;

[0029] Figure 6 This utility model relates to a frameless closed cylindrical screen. Figure 1 Structural cross-sectional view along the AA direction;

[0030] Figure 7 This utility model relates to a frameless closed cylindrical screen. Figure 6Structural cross-sectional view along the BB direction;

[0031] Figure 8 This utility model relates to a frameless closed cylindrical screen. Figure 7 Enlarged view of a portion of the image;

[0032] In the attached diagram: 1. Flexible mesh sheet; 2. Flange; 3. Ring groove; 5. Hooping wire; 6. Rope loop; 7. Lead screw; 8. Steel wire rope; 9. Countersunk hole; 10. Ear plate; 11. Nut; 12. Convex ring; 13. Anti-reverse ring; 14. Mounting hole; 15. Concave structure. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0034] like Figures 1 to 8 As shown, a preferred embodiment of a frameless enclosed cylindrical screen is presented, comprising: a flexible mesh sheet 1 and two flanges 2, each flange 2 having an annular groove 3, the two sides of the flexible mesh sheet 1 being respectively wound around the annular grooves 3 of the two flanges 2 by clamping wires 5, and the two clamping wires 5 being fixedly connected to the two flanges 2 respectively.

[0035] Furthermore, as a preferred embodiment, the flexible mesh 1 connected to the flange 2 is cylindrical.

[0036] After the invention is manufactured, the flanges 2 at both ends move in opposite directions to tighten the soft mesh 1 and form a closed cylinder. Because the soft mesh 1 forms a closed cylindrical shape and its working part has no internal or external rib support, it forms a closed cylindrical frameless soft mesh body, which makes the working area of ​​the soft mesh 1 unobstructed. At the same time, it can realize the quick installation and removal of the soft mesh 1. The frameless design can avoid material blockage, save a lot of manufacturing raw materials and manufacturing time, and increase production capacity.

[0037] Furthermore, as a preferred embodiment, rope loops 6 are formed on both sides of the flexible mesh 1, and two clamping wires 5 pass through the two rope loops 6 respectively.

[0038] Furthermore, as a preferred embodiment, the two sides of the soft mesh 1 are respectively folded to form rope loops 6.

[0039] Furthermore, as a preferred embodiment, each clamping wire 5 includes: two lead rods 7 and a steel wire rope 8. One end of each lead rod 7 is provided with a countersunk hole 9. The two ends of the steel wire rope 8 are respectively embedded in the countersunk holes 9 of the two lead rods 7 and are respectively fixedly connected to the two lead rods 7. The steel wire rope 8 passes through the rope loop 6.

[0040] Preferably, the countersunk hole 9 is arranged along the axial direction of the lead screw 7.

[0041] The two clamping wires 5 pass through the two rope loops 6 of the soft mesh 1 and can move freely. The soft mesh 1 and the two clamping wires 5 are a combination.

[0042] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.

[0043] Based on the above, this utility model also has the following embodiments:

[0044] For further embodiments of this utility model, please refer to... Figures 1 to 8 As shown, each flange 2 is provided with at least one lug 10, and the two screw rods 7 of the same clamping wire 5 are fixedly connected to the lug 10 by nuts 11.

[0045] In a further embodiment of this utility model, each flange 2 is provided with two ear plates 10, and the two screw rods 7 of the same clamping wire 5 are respectively fixedly connected to the two ear plates 10 by nuts 11.

[0046] In a further embodiment of the present invention, each flange 2 has an outwardly extending convex ring 12 on one side and a backstop ring 13 on the other side, and an annular groove 3 is formed between the convex ring 12 and the backstop ring 13.

[0047] Preferably, the main body of flange 2 is an annular web, and the convex ring 12 is an annular flange.

[0048] In a further embodiment of this utility model, the ear plate 10 is fixed on the convex ring 12.

[0049] Preferably, the ear plate 10 has a mounting hole 14 for mounting the lead screw 7. After the lead screw 7 is connected to the nut 11, it is adjusted and fixedly connected to the ear plate 10.

[0050] Preferably, the ear plate 10 is L-shaped.

[0051] The clamping wire 5 of this utility model is wound around the annular groove 3, and the two screw rods 7 are tightened and pass through the mounting holes 14 of the two ear plates 10 respectively. Nuts 11 are installed on each screw rod 7 so that the nuts 11 are limited to the corresponding ear plates 10, thereby fixing the clamping wire 5 on the flange 2.

[0052] In a further embodiment of this utility model, the cross-section of the anti-reverse ring 13 is circular. Furthermore, the plane passing through the central axis of the anti-reverse ring 13 is the first cross-section, and the shape of the anti-reverse ring 13 under this first cross-section is circular. That is, the contact portion between the anti-reverse ring 13 and the flexible mesh 1 is arc-shaped, reducing wear and increasing the lifespan of the flexible mesh. In addition, a partially concave structure 15 is formed at the connection between the anti-reverse ring 13 and the flange 2. When the flexible mesh 1 and the clamping wire 5 are wound within the groove 3, they will be biased towards this concave structure 15, which can improve the connection strength.

[0053] Preferably, the concave structure 15 is located within the groove 3.

[0054] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-supporting closed cylindrical screen, characterized in that, include: The flexible mesh sheet and two flanges are provided. Each flange has an annular groove. The two sides of the flexible mesh sheet are respectively wound around the annular grooves of the two flanges by clamping wires, and the two clamping wires are respectively fixedly connected to the two flanges. The flexible mesh connected to the flange is cylindrical.

2. The frameless closed cylindrical screen according to claim 1, characterized in that, Both sides of the flexible mesh have rope loops, and the two tightening wires pass through the two rope loops respectively.

3. The frameless closed cylindrical screen according to claim 2, characterized in that, The two sides of the flexible mesh are folded to form the rope loops.

4. The frameless closed cylindrical screen according to claim 2, characterized in that, Each of the tightening wires includes: two lead rods and a steel wire rope. One end of each lead rod is provided with a countersunk hole. The two ends of the steel wire rope are respectively embedded in the countersunk holes of the two lead rods and are respectively fixedly connected to the two lead rods. The steel wire rope passes through the rope loop.

5. The frameless closed cylindrical screen according to claim 4, characterized in that, Each flange is provided with at least one lug, and the two lead screws of the same clamping wire are fixedly connected to the lug by nuts.

6. The frameless closed cylindrical screen according to claim 5, characterized in that, Each flange is provided with two ear plates, and the two screw rods of the same clamping wire are respectively fixedly connected to the two ear plates by the nuts.

7. The frameless closed cylindrical screen according to claim 6, characterized in that, Each of the flanges has an outwardly extending convex ring on one side and a retaining ring on the other side, with the convex ring and the retaining ring forming the annular groove.

8. The frameless closed cylindrical screen according to claim 7, characterized in that, The ear plate is fixed to the convex ring.

9. The frameless closed cylindrical screen according to claim 7, characterized in that, The anti-reverse ring has a circular cross-section.

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