Unpowered flapping device for drum screen

Abstract

The utility model discloses an unpowered flapping device for a drum screen, drum screen equipment is provided with a shell and a drum screen rotatably installed on the shell, the unpowered flapping device is installed on the drum screen equipment, the unpowered flapping device comprises elastic rods, a counterweight plate and ejector pins, a plurality of elastic rods and a plurality of ejector pins are arranged along the axis direction of the drum screen, and the counterweight plate and the ejector pins are arranged along the axis direction of the drum screen. The fixed end of the elastic rod is installed on the shell, the balance weight plate is installed at the free end of the elastic rod, the free end of the elastic rod abuts against the upper portion of the peripheral face of the drum screen, and the ejector pin is installed on the peripheral face of the drum screen and matched with the free end of the elastic rod. According to the unpowered flapping device, a traditional mode of doing work from a drum screen to a mode of doing work from the drum screen to a mode of doing work from the drum screen to a mode of doing work from the drum screen to a mode of doing work from the drum screen to the upper portion of the drum screen, on one hand, materials are separated from screen holes more easily after flapping, the hole cleaning effect is good, and on the other hand, damage to the materials in the drum screen is greatly avoided. And the device is positioned outside the drum screen, so that the inspection, replacement and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of drum screen equipment, in particular to a power-free flapping device for a drum screen. Background Art

[0002] The drum screen is one of the commonly used material screening devices and is widely used for its high screening efficiency and large workload. When materials enter the cylindrical screen, under the action of the rotation of the inclined cylindrical screen, the materials on the inner circumferential surface of the cylindrical screen are turned over and rolled, so that the qualified materials (screened products) fall through the cylindrical screen, and the unqualified materials (products on the screen) are discharged through the discharge port at the tail of the cylindrical screen. Due to the turnover and rolling of the materials in the cylindrical screen, the materials often get stuck in the screen holes, causing the screen holes to be blocked.

[0003] The general treatment method for screen hole blockage is to fill some spheres in the cylindrical screen, install a screen at the tail of the cylindrical screen, block the spheres but not the materials, prevent the spheres from being discharged from the cylindrical screen, and when the cylindrical screen rotates, the spheres do free-fall motion to impact the cylindrical screen and eject the blockage in the screen holes; or connect the spheres to the inner surface of the cylindrical screen with ropes to prevent the spheres from rolling out with the materials and ensure the smoothness of free fall, and the hole cleaning effect is better.

[0004] However, the above hole cleaning method does work from the inside to the drum screen, which is very likely to affect the internal materials. For some materials that cannot be impacted and need to maintain their original shape or appearance, such as wheat, corn or some nuts, this hole cleaning method is not suitable, and there is an urgent need for a hole cleaning device that works from the outside to the drum screen. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a power-free flapping device for a drum screen to solve the problem that the existing drum screen hole cleaning method needs to work from the inside to the drum screen and is not suitable for materials that cannot be impacted and need to maintain their original shape or appearance.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A power-free flapping device for a drum screen includes a drum screen device, the drum screen device has a housing and a cylindrical screen rotatably installed on the housing, a power-free flapping device is installed on the drum screen device, the power-free flapping device includes elastic rods, a counterweight plate and a thimble, a plurality of the elastic rods and a plurality of the thimbles are all arranged along the axial direction of the cylindrical screen, the fixed ends of the elastic rods are installed on the housing, the counterweight plate is installed on the free ends of the elastic rods, the free ends of the elastic rods are abutted against the upper part of the outer circumference of the cylindrical screen, the thimble is installed on the outer circumference of the cylindrical screen, and the thimble is adapted to the free end of the elastic rod.

[0008] A further technical solution is that a plurality of rows of the ejector pins are uniformly installed on the outer peripheral surface of the cylindrical sieve along the circumferential direction.

[0009] A further technical solution is that the ejector pins are installed on the outer peripheral surface of the cylindrical sieve through cross bars, and a plurality of bolts adapted to the through holes on the ejector pins are arranged on the cross bars.

[0010] A further technical solution is that the ejector pin is a triangular plate, and the triangular plate is formed by welding three steel plates.

[0011] A further technical solution is that a warping portion away from the outer peripheral surface of the cylindrical sieve is arranged at the free end of the elastic rod.

[0012] A further technical solution is that a wear-resistant plate is installed at the free end of the elastic rod, and the wear-resistant plate abuts against the outer peripheral surface of the cylindrical sieve.

[0013] A further technical solution is that the fixed end of the elastic rod is rotationally connected with the housing through a torsion spring.

[0014] Compared with the prior art, at least one of the following beneficial effects can be achieved by the present utility model:

[0015] The present utility model provides a power-free flapping device for a drum sieve. The power-free flapping device changes the traditional way of clearing holes by doing work from the inside to the cylindrical sieve to doing work from the outside to the cylindrical sieve, and the working part is located at the upper part of the cylindrical sieve. First, the material is more likely to break away from the sieve holes after being flapped, and the hole clearing effect is better. Second, the problem of damaging the material inside the cylindrical sieve is greatly avoided, and the device is located outside the cylindrical sieve, which is convenient for inspection, replacement and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic structural diagram of a power-free flapping device for a drum sieve according to the present utility model.

[0017] Figure 2 For the present utility model Figure 1 is a schematic structural diagram of the power-free flapping device in the middle.

[0018] Figure 3 For the present utility model Figure 2 is a schematic structural diagram of the elastic rod in the middle.

[0019] Reference numerals: 1. Drum sieve equipment; 2. Power-free flapping device; 3. Elastic rod; 4. Counterweight plate; 5. Ejector pin; 6. Housing; 7. Cylindrical sieve; 9. Bolt; 10. Warping portion; 11. Wear-resistant plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0022] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0023] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of the present utility model is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Example:

[0027] As shown in this embodiment Figure 1 and Figure 2 As shown, a non-powered flapping device for a drum sieve includes a drum sieve device 1, the drum sieve device 1 has a housing 6 and a drum sieve 7 rotatably mounted on the housing 6. A non-powered flapping device 2 is installed on the drum sieve device 1. The non-powered flapping device 2 includes elastic rods 3, counterweight plates 4 and thimbles 5. A plurality of elastic rods 3 and a plurality of thimbles 5 are both arranged along the axial direction of the drum sieve 7. The fixed ends of the elastic rods 3 are installed on the housing 6, the counterweight plates 4 are installed on the free ends of the elastic rods 3. The free ends of the elastic rods 3 are in tight contact with the upper part of the outer peripheral surface of the drum sieve 7. The thimbles 5 are installed on the outer peripheral surface of the drum sieve 7, and the thimbles 5 are adapted to the free ends of the elastic rods 3.

[0028] With the external non-powered flapping device 2 on the drum sieve device 1, on the basis of not requiring additional power, the materials blocking the sieve holes can be flapped down to achieve the effect of clearing the holes, and it will not affect the materials inside the drum sieve 7. It is applicable to materials such as melon seeds and peanuts whose shapes cannot be damaged and the original shape or appearance needs to be guaranteed. Specifically, after the materials enter the drum sieve 7 from the feed end of the drum sieve device 1, when the inclined drum sieve 7 rotates, the materials are screened and discharged while moving forward. During this period, the thimbles 5 on the drum sieve 7 will intermittently lift the elastic rods 3 during rotation. The elastic rods 3 will make intermittent movements between being lifted and resetting relying on their own elasticity or the gravity of the counterweight plates 4, thereby flapping the upper part of the outer peripheral surface of the drum sieve 7 to vibrate and drop the materials blocking the sieve holes.

[0029] Preferably, multiple rows of thimbles 5 are evenly installed on the outer peripheral surface of the drum sieve 7 along the circumferential direction.

[0030] Multiple rows of thimbles 5 can increase the flapping frequency of the non-powered flapping device 2 on the basis of the constant rotation speed of the drum sieve 7.

[0031] Preferably, the thimbles 5 are installed on the outer peripheral surface of the drum sieve 7 through cross bars 8, and a plurality of bolts 9 adapted to the through holes on the thimbles 5 are arranged on the cross bars 8.

[0032] The cross bars 8 avoid directly installing the thimbles 5 on the drum sieve 7 and also facilitate the adjustment of the number of rows of the thimbles 5 in the later stage. The bolts 9 facilitate the installation of the thimbles 5.

[0033] Preferably, the thimbles 5 are triangular plates, and the triangular plates are welded by three steel plates.

[0034] The thimbles 5 are arched triangular plates, which are convenient for the cooperation with the elastic rods 3 to smoothly lift the elastic rods 3.

[0035] Preferably, the free ends of the elastic rods 3 are provided with warping parts 10 away from the outer peripheral surface of the drum sieve 7.

[0036] The warping part 10 avoids hitting the ejector pin 5, facilitating the ejector pin 5 to smoothly lift the elastic rod 3.

[0037] Preferably, a wear-resistant plate 11 is installed on the free end of the elastic rod 3, and the wear-resistant plate 11 is pressed against the outer peripheral surface of the cylindrical sieve 7.

[0038] The wear-resistant plate 11 mainly avoids the elastic rod 3 being worn by the ejector pin 5.

[0039] Preferably, the fixed end of the elastic rod 3 is rotatably connected to the housing 6 through a torsion spring.

[0040] When using the torsion spring, the use of the counterweight 4 can be reduced or even avoided to a certain extent, and the torsion spring can press the free end of the elastic rod 3 against the outer peripheral surface of the cylindrical sieve 7.

[0041] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An unpowered flapping device for a drum screen, comprising a drum screen device (1), the drum screen device (1) having a housing (6) and a drum screen (7) rotatably mounted on the housing (6), characterized in that: An unpowered flapping device (2) is installed on the drum sieve device (1). The unpowered flapping device (2) includes elastic rods (3), counterweight plates (4) and thimbles (5). A plurality of the elastic rods (3) and a plurality of the thimbles (5) are all arranged along the axial direction of the cylindrical sieve (7). The fixed ends of the elastic rods (3) are installed on the housing (6). The counterweight plates (4) are installed on the free ends of the elastic rods (3). The free ends of the elastic rods (3) are in tight contact with the upper part of the outer peripheral surface of the cylindrical sieve (7). The thimbles (5) are installed on the outer peripheral surface of the cylindrical sieve (7), and the thimbles (5) are adapted to the free ends of the elastic rods (3).

2. The non-powered flapping device for a drum sieve according to claim 1, wherein: Multiple rows of the thimbles (5) are evenly installed on the outer peripheral surface of the cylindrical sieve (7) along the circumferential direction.

3. The unpowered flapping device for a drum sieve according to claim 1, characterized in that: The thimbles (5) are installed on the outer peripheral surface of the cylindrical sieve (7) through cross bars (8), and a plurality of bolts (9) adapted to the through holes on the thimbles (5) are arranged on the cross bars (8).

4. The power-free flapping device for a cylindrical sieve according to claim 1, characterized in that: The thimbles (5) are triangular plates, and the triangular plates are welded by three steel plates.

5. The non-powered flapping device for a cylinder sieve according to claim 1, characterized in that: A warping portion (10) away from the outer peripheral surface of the cylindrical sieve (7) is arranged at the free end of the elastic rod (3).

6. The power-free flapping device for a cylinder sieve according to claim 1, characterized in that: A wear-resistant plate (11) is installed on the free end of the elastic rod (3), and the wear-resistant plate (11) is in tight contact with the outer peripheral surface of the cylindrical sieve (7).

7. The unpowered flapping device for a cylindrical sieve according to claim 1, characterized in that: The fixed end of the elastic rod (3) is rotationally connected to the housing (6) through a torsion spring.

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