Particle grading and screening device for straw pulverizer

Abstract

The utility model discloses a particle grading and screening device for a straw pulverizer, which comprises a base, an equipment fixing table is arranged on the base, a pulverizer main body is arranged on the equipment fixing table, a feed chute is arranged at the front end of the pulverizer main body, a discharge slope is arranged at the discharge end of the pulverizer main body, and a feed hopper is arranged on the feed chute. A screening mechanism support is arranged on the side, away from the feeding groove, of the equipment fixing table, and a grading screening mechanism is arranged in the screening mechanism support. By arranging the first-stage screening frame and the second-stage screening frame, powder falls into the first-stage screening frame along a discharging slope, large-particle powder is screened out through a first-stage screen, the remaining powder falls into the second-stage screening frame, medium-particle powder is separated out through a second-stage screen, and the remaining small-particle powder falls into a third-stage discharging frame at the bottom to be discharged. Therefore, classified screening of large, medium and small particle powder is achieved.

Description

Technical Field

[0001] This utility model relates to the field of straw crushing technology, specifically to a particle grading and screening device for a straw crusher. Background Technology

[0002] Straw seedling substrate trays are seedling substrates made primarily from straw, used for raising seedlings of crops such as rice and vegetables. They are created by crushing, fermenting, and compressing straw to produce a substrate suitable for seed germination and seedling growth. Straw seedling substrate trays utilize straw resources, reduce environmental pollution, and are an environmentally friendly, economical, and efficient seedling raising method that aligns with the concept of sustainable development in modern agriculture and has broad application prospects.

[0003] After straw is crushed by a crusher, the resulting powder will contain particles of different sizes. Different crops have different requirements for seedling substrate trays. Some require large powder particles, while others require fine powder. Before making seedling substrate trays, the powder needs to be sieved according to particle size to meet the different requirements of seedling substrate trays. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a particle grading and screening device for a straw crusher, so as to solve the problem of screening straw powder according to particle size mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a particle grading and screening device for a straw crusher, comprising a base, an equipment fixing platform on the base, a crusher body on the equipment fixing platform, a feeding chute at the front end of the crusher body, a discharge ramp at the discharge end of the crusher body, a screening mechanism support on the side of the equipment fixing platform away from the feeding chute, and a grading and screening mechanism inside the screening mechanism support;

[0006] The grading and screening mechanism includes a primary screening frame, a primary screen, a primary discharge port, a primary timed discharge valve, a secondary screening frame, a secondary screen, a secondary discharge port, a secondary timed discharge valve, a tertiary discharge frame, a tertiary discharge port, and a vibrator. The primary screening frame is fixed at the bottom of the discharge slope. A primary screen is installed at the bottom of the primary screening frame. A primary discharge port is opened on the bottom side of the primary screening frame. A primary timed discharge valve is installed inside the primary discharge port. A secondary screening frame is fixed below the primary screening frame. A secondary screen is installed at the bottom of the secondary screening frame. A secondary discharge port is opened on the bottom side of the secondary screening frame. A secondary timed discharge valve is installed inside the secondary discharge port. A tertiary discharge frame is installed below the secondary screening frame. A tertiary discharge port is opened at the bottom of the tertiary discharge frame. The vibrator is installed at the bottom of the primary and secondary screens.

[0007] As a preferred embodiment of this utility model, a primary pusher plate is provided inside the lower side wall of the primary screening frame, the primary pusher plate is connected to a primary pusher electric cylinder, and the primary pusher electric cylinder is fixed on the screening mechanism support.

[0008] As a preferred embodiment of this utility model, a secondary pusher plate is provided in the lower side wall of the secondary screening frame, the secondary pusher plate is connected to a secondary pusher electric cylinder, and the secondary pusher electric cylinder is fixed on the screening mechanism support.

[0009] As a preferred embodiment of this utility model, the primary screening frame is inclined at a small angle along the material discharge slope, the secondary screening frame is inclined in the opposite direction to the primary screening frame, and the tertiary discharge frame is inclined in the opposite direction to the secondary screening frame.

[0010] As a preferred embodiment of this utility model, the pushing surface of the primary pusher plate is set to be inclined towards the primary discharge port, and the thin end is aligned with the lower end of the primary discharge port.

[0011] As a preferred embodiment of this utility model, the pushing surface of the secondary pusher plate is set to be inclined towards the secondary discharge port, and the thin end is aligned with the lower end of the secondary discharge port.

[0012] As a preferred embodiment of this utility model, a primary rubber shock-absorbing belt is provided around the primary screen, and the primary rubber shock-absorbing belt is fixed inside the primary screening frame.

[0013] As a preferred embodiment of this invention, a secondary rubber shock-absorbing belt is provided around the secondary screen, and the secondary rubber shock-absorbing belt is fixed inside the secondary screening frame.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention features a primary and secondary screening frame. After the straw crusher discharges, the powder falls along the feed slope into the primary screening frame. Large particles are screened out by the primary screen and discharged from the primary outlet. The remaining powder falls into the secondary screening frame, where medium-sized particles are separated and discharged from the secondary outlet. The remaining small particles fall into the bottom tertiary discharge frame. A vibrator causes the primary and secondary screens to vibrate, assisting them in screening the powder, thus achieving the grading and screening of large, medium, and small particles.

[0016] This invention, by installing a primary pusher plate and a secondary pusher plate, allows for the screening of straw powder. Since both the primary and secondary screening frames are tilted at a small angle, the amount of powder to be screened gradually increases over time. One screening cycle is insufficient to separate powder of different particle sizes. The primary and secondary pusher plates then push the accumulated powder upwards for a second screening, further separating the powder. This process is repeated multiple times, resulting in finer powder screening.

[0017] This invention isolates the vibration of the primary and secondary screens from the primary and secondary screening frames by installing primary and secondary rubber shock-absorbing belts on the outer frames of the primary and secondary screens, thereby preventing vibration from the primary and secondary screening frames, protecting the equipment, and extending its service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall planar structure of this utility model;

[0019] Figure 2 This is a top view of the primary screening frame structure of this utility model;

[0020] Figure 3 This is a side view of the secondary screening frame structure of this utility model.

[0021] In the diagram: 1. Base; 2. Equipment mounting platform; 3. Crusher body; 4. Feed chute; 5. Discharge ramp; 6. Screening mechanism support; 7. Grading and screening mechanism; 701. Primary screening frame; 702. Primary screen; 703. Primary discharge port; 704. Primary timed discharge valve; 705. Secondary screening frame; 706. Secondary screen; 707. Secondary discharge port; 708. Secondary timed discharge valve; 709. Tertiary discharge frame; 710. Tertiary discharge port; 711. Vibrator; 712. Primary pusher plate; 713. Primary pusher electric cylinder; 714. Secondary pusher plate; 715. Secondary pusher electric cylinder; 716. Primary rubber shock absorber belt; 717. Secondary rubber shock absorber belt. Detailed Implementation

[0022] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 3As shown, this utility model provides a particle grading and screening device for a straw crusher, including a base 1, an equipment fixing platform 2 on the base 1, a crusher body 3 on the equipment fixing platform 2, a feeding trough 4 at the front end of the crusher body 3, a discharge ramp 5 at the discharge end of the crusher body 3, a screening mechanism support 6 on the side of the equipment fixing platform 2 away from the feeding trough 4, and a grading and screening mechanism 7 inside the screening mechanism support 6.

[0024] refer to Figure 1-3 The grading and screening mechanism 7 includes a primary screening frame 701, a primary screen 702, a primary discharge port 703, a primary timed discharge valve 704, a secondary screening frame 705, a secondary screen 706, a secondary discharge port 707, a secondary timed discharge valve 708, a tertiary discharge frame 709, a tertiary discharge port 710, and a vibrator 711. The primary screening frame 701 is fixed to the bottom of the discharge slope 5. A primary screen 702 is installed at the bottom of the primary screening frame 701, and a primary discharge port 703 is opened on the bottom side of the primary screening frame 701. A primary timed discharge valve 704 is installed inside the 703. A secondary screening frame 705 is fixed below the primary screening frame 701. A secondary screen 706 is installed at the bottom of the secondary screening frame 705. A secondary discharge port 707 is opened on the bottom side of the secondary screening frame 705. A secondary timed discharge valve 708 is installed inside the secondary discharge port 707. A tertiary discharge frame 709 is installed below the secondary screening frame 705. A tertiary discharge port 710 is opened at the bottom of the tertiary discharge frame 709. A vibrator 711 is installed at the bottom of the primary screen 702 and the secondary screen 706.

[0025] By setting up a primary screening frame 701 and a secondary screening frame 705, after the straw crusher discharges, the powder falls into the primary screening frame 701 along the feeding slope 5. The large particles of powder are screened out by the primary screen 702 and discharged from the primary discharge port 703. The remaining powder falls into the secondary screening frame 705, and the medium particles are separated by the secondary screen 706 and discharged from the secondary discharge port 707. The remaining small particles of powder fall into the bottom tertiary discharge frame 709 for discharge. The vibrator 711 causes the primary screen 702 and the secondary screen 706 to vibrate, which assists the primary screen 702 and the secondary screen 706 in screening the powder, thereby realizing the grading and screening of large, medium and small particles of powder.

[0026] refer to Figure 2 , Figure 3 A primary pusher plate 712 is provided inside the lower side wall of the primary screening frame 701. The primary pusher plate 712 is connected to a primary pusher electric cylinder 713, which is fixed on the screening mechanism support 6. A secondary pusher plate 714 is provided inside the lower side wall of the secondary screening frame 705. The secondary pusher plate 714 is connected to a secondary pusher electric cylinder 715, which is fixed on the screening mechanism support 6.

[0027] By installing the primary pusher plate 712 and the secondary pusher plate 714, when the straw powder is being screened, the primary screening frame 701 and the secondary screening frame 705 are both tilted at a small angle. As time goes by, the amount of powder to be screened in the frame gradually increases. One screening is not enough to screen the powder of different particle sizes. The primary pusher plate 712 and the secondary pusher plate 714 push the accumulated powder upwards for secondary screening to further separate the powder. This process is repeated multiple times to make the powder screening more refined.

[0028] refer to Figure 2 , Figure 3 The primary screen 702 is surrounded by a primary rubber shock-absorbing belt 716, which is fixed inside the primary screening frame 701. The secondary screen 706 is surrounded by a secondary rubber shock-absorbing belt 717, which is fixed inside the secondary screening frame 705.

[0029] By installing primary rubber damping belts 716 and secondary rubber damping belts 717 on the outer frames of primary screen 702 and secondary screen 706, the vibration of primary screen 702 and secondary screen 706 is isolated from primary screening frame 701 and secondary screening frame 705, thus preventing vibration of primary screening frame 701 and secondary screening frame 705, protecting the equipment, and extending its service life.

[0030] The working principle and usage process of this utility model are as follows: After the straw is crushed by the main body 3 of the crusher, the powder falls into the primary screening frame 701 along the feeding slope 5. The vibrator 711 drives the primary screen 702 to vibrate, and the powder rolls down the surface of the primary screen 702. During the rolling process, the smaller powder particles fall into the secondary screening frame 705. The remaining powder is pushed to the primary screening frame 701 by the primary pusher plate 712 for secondary screening. After repeating this process several times, the primary timed discharge valve 704 opens, and the larger particles are discharged from the primary discharge port 703. For granular powder, the vibrator 711 drives the secondary screen 706 to vibrate. The powder falling into the secondary screening frame 705 rolls down along the surface of the secondary screen 706. During the rolling process, small particles of powder fall into the bottom tertiary discharge frame 709 for discharge, and the small particles of powder are screened out. The remaining powder is pushed by the secondary pusher plate 714 to the secondary screening frame 705 for secondary screening. After repeating this process multiple times, the secondary timed discharge valve 708 opens and discharges the powder from the secondary discharge port 707, separating out the medium particles of powder, thereby achieving the classification and screening of large, medium and small particles of powder.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] 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 granular classification screening device for a straw pulverizer, comprising a base (1), characterized in that: Therefore, the base (1) is provided with a device fixing table (2), the device fixing table (2) is provided with a crusher main body (3), the front end of the crusher main body (3) is provided with a feeding chute (4), the discharge end of the crusher main body (3) is provided with a discharging slope (5), and the side, away from the feeding chute (4), of the device fixing table (2) is provided with a screening mechanism support (6); the screening mechanism support (6) is internally provided with a grading screening mechanism (7). The grading screening mechanism (7) comprises a first screening frame (701), a first screen (702), a first discharge port (703), a first timing discharge valve (704), a second screening frame (705), a second screen (706), a second discharge port (707), a second timing discharge valve (708), a third discharge frame (709), a third discharge port (710) and a vibrator (711); the first screening frame (701) is fixed at the bottom of the discharging slope (5), the bottom of the first screening frame (701) is provided with the first screen (702), a side edge of the bottom of the first screening frame (701) is provided with the first discharge port (703), the first discharge port (703) is internally provided with the first timing discharge valve (704), the first screening frame (701) is fixed below the second screening frame (705), the bottom of the second screening frame (705) is provided with the second screen (706), a side edge of the bottom of the second screening frame (705) is provided with the second discharge port (707), the second discharge port (707) is internally provided with the second timing discharge valve (708), the second screening frame (705) is provided below the third discharge frame (709), the bottom of the third discharge frame (709) is provided with the third discharge port (710), and the vibrator (711) is arranged at the bottom of the first screen (702) and the second screen (706).

2. The granule classifying and screening device for a straw pulverizer according to claim 1, characterized in that: A first pushing plate (712) is arranged in the sidewall below the first screening frame (701), the first pushing plate (712) is connected with a first pushing cylinder (713), and the first pushing cylinder (713) is fixed on the screening mechanism support (6).

3. The granule classifying and screening device for a straw pulverizer according to claim 1, characterized in that: A second pushing plate (714) is arranged in the sidewall below the second screening frame (705), the second pushing plate (714) is connected with a second pushing cylinder (715), and the second pushing cylinder (715) is fixed on the screening mechanism support (6).

4. The granule classifying and screening device for a straw pulverizer according to claim 1, characterized in that: The first screening frame (701) is slightly inclined along the direction of the discharging slope (5), the second screening frame (705) is inclined in the opposite direction of the first screening frame (701), and the third discharge frame (709) is inclined in the opposite direction of the second screening frame (705).

5. The granule classifying and screening device for a straw pulverizer according to claim 2, characterized in that: The pushing surface of the first pushing plate (712) is inclined to the first discharge port (703), and the thin end is aligned with the lower end of the first discharge port (703).

6. The granule classifying and screening device for a straw pulverizer according to claim 3, characterized in that: The pushing surface of the second pushing plate (714) is inclined to the second discharge port (707), and the thin end is aligned with the lower end of the second discharge port (707).

7. The granule classifying and screening device for a straw pulverizer according to claim 1, characterized in that: The primary screen (702) is surrounded by a primary rubber shock-absorbing belt (716), which is fixed inside the primary screening frame (701).

8. The granule classifying and screening device for a straw pulverizer according to claim 1, characterized in that: The secondary screen (706) is surrounded by a secondary rubber shock-absorbing belt (717), which is fixed inside the secondary screening frame (705).

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