Pepper anti-blocking screening machine

Abstract

The utility model relates to an agricultural implement, namely a pepper anti-blocking screening machine, which comprises a feeding hopper (3), a crushing bin (4) and a drum screen (5), the drum screen (5) is in the shape of a cylinder, the cylinder wall is covered with screen gaps capable of screening out broken stems and leaves and separating pepper fruits, and the drum screen (5) is characterized in that a collecting and conveying belt (6) is mounted at the rear end of the drum screen (5), the collecting and conveying belt (6) is a closed loop plate-shaped belt, the two ends of the collecting and conveying belt (6) are respectively supported by shafts (10), the shafts (10) are mounted on a machine frame (1) outside the drum screen (5) through supports (11), one of the shafts (10) is in transmission with a power machine (2), and the front end of the collecting and conveying belt (6) extends into the drum screen (5). The beneficial effects are that the collecting and conveying belt at the rear end of the drum screen can forcibly output materials and is not prone to blocking, thereby improving the stability and safety of the implement operation and providing an applicable implement for pepper harvesting.

Description

Technical Field

[0001] This utility model relates to an agricultural machine, namely a chili anti-clogging screening machine. Background Technology

[0002] Chili pepper screening machines are widely used in large-scale chili pepper growing areas. These machines typically consist of a feeding hopper, a crushing chamber, and a drum screen. The drum screen itself is cylindrical, with numerous perforations along its walls. Mounted on a frame, the drum screen's axis is usually inclined at the front and lower at the back, rotating around this axis under the drive of a motor. During operation, chili pepper plants are first cut and dried. The stems and leaves become brittle and easily broken after drying, while the pepper fruits become more resilient and less prone to breakage. The chili pepper plants are then fed into the crushing chamber, crushed, and then fed into the drum screen. As the drum screen rotates, it sifts out the crushed stems and leaves, while the pepper fruits are conveyed to the outlet at the rear, flowing out by gravity for packaging and transportation.

[0003] However, current rotary drum screens rely solely on the weight of the chilies at the rear, making them prone to clogging. Clogging often necessitates machine shutdown, reducing efficiency and potentially disrupting planting seasons, leading to losses. Furthermore, operators, in an attempt to quickly remove the clogged material, often manually remove it, which is extremely unsafe and can easily cause injuries. Summary of the Invention

[0004] The purpose of this invention is to develop a chili anti-clogging screening machine that can perform screening operations on chili peppers and stems, is not prone to clogging, has high operating efficiency, and good safety.

[0005] The above objective is achieved by the following technical solution: providing a chili anti-clogging screening machine, including a feeding hopper, a crushing chamber and a drum screen. The drum screen is cylindrical, and the cylinder wall is covered with sieve slots that can screen out broken stems and leaves while retaining chili fruits. Its feature is that: the rear end of the drum screen is equipped with a collecting conveyor belt, which is a closed-loop plate belt. The front and rear ends of the collecting conveyor belt are supported by rotating shafts. The rotating shafts are mounted on the frame outside the drum screen through brackets. One of the rotating shafts is driven by a power machine. The front end of the collecting conveyor belt extends into the drum screen.

[0006] The screen wall of the rotary drum screen is a grid composed of intersecting lines.

[0007] The screen wall of the rotary drum screen is formed by multiple slender rods placed one in front of the other.

[0008] The screen wall of the rotary drum screen is formed by multiple annular lines.

[0009] The drum screen is mounted on a frame and supported by rotatable rollers on both sides of the frame. One side of the roller is the driving roller, and the other side is the driven roller. The driving roller can rotate under the drive of the transmission shaft, and thus drive the drum screen to rotate.

[0010] The front of the frame is equipped with a power unit, the drive shaft of which extends rearward and drives at least two active idler rollers. The lifting belt shaft is driven by the reversing mechanism and the lifting device shaft, and the other end of the lifting belt shaft is driven by the collecting belt shaft.

[0011] The outer surface of the conveyor belt is equipped with scrapers or scraper teeth.

[0012] The conveyor belt rotates clockwise, meaning the upper belt moves backward and the lower belt moves forward, causing the material from the drum screen to flow out from below the lower belt or be forcibly discharged from above the upper belt.

[0013] The conveyor belt rotates counterclockwise, meaning the upper belt moves forward and the lower belt moves backward. The scraper or scraper teeth below the lower belt insert and push the material out of the drum screen.

[0014] The rear end of the drum screen is sealed with a thin plate, and a forced discharge port is opened in the middle of the thin plate. Multiple material support plates are installed on the inner wall of the rear section of the drum screen. One side of the material support plate is fixed to the inner wall of the drum screen, and the other side extends into the drum screen. The front part of the conveyor belt is inserted into the forced discharge port and is opposite to the material support plate. The conveyor belt rotates clockwise, that is, the upper belt moves backward and the lower belt moves forward. The material below the conveyor belt moves upward with the material support plate, falls down onto the conveyor belt by gravity above the conveyor belt, and is then pushed out of the drum screen by the conveyor belt.

[0015] The beneficial effects of this utility model are: the conveyor belt at the rear end of the drum screen can force the material out, making it less prone to clogging, thereby improving the stability and safety of the machine's operation and providing a suitable machine for chili harvesting. Attached Figure Description

[0016] Figure 1 is a front view of the first embodiment; Figure 2 is a top view of the first embodiment; Figure 3 is an assembly front view of the component drum screen and the collecting conveyor belt of the first embodiment; Figure 4 is a front view of the component conveyor belt of the first embodiment; Figure 5 is a top view of the component conveyor belt of the first embodiment; Figure 6 is a top view of the transmission mechanism of the first embodiment; Figure 7 is a right-side schematic diagram of the working state of the drum screen in the first embodiment; Figure 8 is a front view of the second embodiment; Figure 9 is a top view of the second embodiment; Figure 10 is a top view of the transmission mechanism in the second embodiment; Figure 11 is a front view of the third embodiment; Figure 12 is a top view of the third embodiment; Figure 13 is a front view of the fourth embodiment; Figure 14 is a partially enlarged perspective view of the component drum screen in the fourth embodiment; Figure 15 is a perspective view of a structure of the conveyor belt according to the fifth embodiment; Figure 16 is a perspective view of another structure of the conveyor belt in the fifth embodiment; Figure 17 is a schematic diagram of the working state of the drum screen and the conveyor belt in the fifth embodiment; Figure 18 is a front sectional view of the drum screen according to the sixth embodiment; Figure 19 is a left view of the drum screen of the sixth embodiment.

[0017] As shown in the diagram: 1. Frame; 2. Power unit; 3. Feed hopper; 4. Crushing chamber; 5. Rotary drum screen; 6. Conveying belt; 6-1 upper belt; 6-2 lower belt; 7. Track; 8. Drive shaft; 9. Idler roller; 9-1 driving idler roller; 9-2 driven idler roller; 10. Rotating shaft; 11. Support bracket; 12. Support belt; 13. Support ring; 14. Elevator; 15. Circular line; 16. Scraper; 17. Scraper teeth; 18. Material support plate; 19. Thin plate; 20. Forced discharge port. Detailed Implementation

[0018] The overall concept of this utility model is to install a forced discharge device at the rear end of the chili harvesting drum screen to avoid clogging. Seven embodiments are described below with reference to the accompanying drawings: First embodiment: Figures 1 and 2 illustrate a chili anti-clogging screening machine, including a feeding hopper 3, a crushing chamber 4, and a drum screen 5. As can be seen from Figure 3, the drum screen is cylindrical, and the cylinder wall is covered with slits to screen out broken stems and leaves and separate chili fruits.

[0019] The screen wall of the drum screen is made of a grid of intersecting lines. The size of the grid is such that broken chili stems and leaves are sieved out, while the chili fruits are retained. This type of grid drum screen was not previously available. Experiments have shown that this form of drum screen also has good chili sieving performance, and it is simple to manufacture, lightweight, and low in cost.

[0020] The drum screen is provided with two or more rigid tracks 7 on its periphery, and the rollers 9 on the frame are supported on the tracks 7.

[0021] The rear end of the drum screen is equipped with a collecting conveyor belt 6.

[0022] As shown in Figures 4 and 5, the collecting and conveying belt 6 resembles a conveyor belt and is a closed-loop plate-shaped belt composed of an upper belt 6-1 and a lower belt 6-2. The collecting and conveying belt is supported at both ends by rotating shafts 10, which are mounted on the frame 1 outside the drum screen via brackets 11. One of the rotating shafts is connected to the power unit 2, and the front end of the collecting and conveying belt extends into the drum screen.

[0023] Figure 6 further illustrates the assembly relationship between the drum screen and the frame. As shown in the figure, the drum screen 5 is mounted on the frame 1 and supported by rotatable rollers 9 on both sides of the frame. One roller is the driving roller 9-1, and the other is the driven roller 9-2. The driving roller is connected to the power unit 2 at the front of the frame via a drive shaft 8, and drives the drum screen to rotate through friction with the track 7 surrounding the drum screen.

[0024] As can be seen from Figures 1 and 6, the front of the frame 1 is equipped with a power unit 2, the drive shaft 8 of which extends rearward and drives at least two active idler rollers 9-1. The drive shaft then connects to the rotating shaft 10 at the rear end of the conveyor belt via a reversing mechanism.

[0025] During operation, the conveyor belt rotates clockwise, with the upper belt moving backward and the lower belt moving forward. As shown in Figure 7, the material flowing to the rear end of the drum screen at this time partially flows out from the lower part of the rear port. When material accumulates, it is dragged upward by the inner wall of the drum screen. Because the drum screen wall has a mesh structure and relatively low strength, multiple support belts 12 installed along the front-to-back direction and two or more support rings 13 form the internal skeleton of the screen. These support belts further increase the friction between the screen wall and the material, pushing the material upward. When the material moves above the conveyor belt, it falls onto the conveyor belt under gravity, and the rotating conveyor belt forces the material out of the drum screen. In this way, material does not easily accumulate at the rear port of the drum screen, thus preventing blockages.

[0026] To better receive the chili peppers, a discharge plate can be installed below the rear end of the drum screen. The screened chilies are then discharged by the discharge plate and can be directly bagged, placed on a mat on the ground to receive them, or loaded into vehicles at any time.

[0027] The second embodiment is an improvement upon the first embodiment. As shown in Figures 8 and 9, an elevator 14 is added after the drum screen 5 and the conveyor belt 6. The elevator is an existing product, containing a conveyor belt and a carrying plate, which can lift the pepper fruits to a higher position and then place them into a vehicle or other location through the outlet.

[0028] Referring to Figure 10, a transmission method is described. The drum screen 5 is mounted on the frame 1 and supported by rotatable idler rollers 9 on both sides of the frame. One idler roller is the driving idler roller 9-1, and the other idler roller is the driven idler roller 9-2. The driving idler roller can rotate under the drive of the transmission shaft 8. The front end of the transmission shaft obtains power from the power unit 2 at the front of the frame 1, and the rear end of the transmission shaft extends backward, driving at least two driving idler rollers 9-1. The transmission direction is then changed by the reversing mechanism, and it drives one end of the shaft of the elevator conveyor belt. The other end of the shaft of the elevator conveyor belt drives the shaft of the collecting conveyor belt.

[0029] The third embodiment is an improvement upon the first embodiment. As shown in Figures 11 and 12, the cylinder wall of the drum screen 5 is formed by multiple thin rods installed along the front-to-back direction, and the gaps between adjacent thin rods are the sieve gaps for screening out stem and leaf particles. This type of drum screen is currently widely used. However, a product with a conveyor belt 6 installed behind the drum screen 5 is not yet on the market.

[0030] An elevator 14 is installed at the rear of the conveyor belt. The elevator is an existing product that contains a conveyor belt and a material carrier plate. It can lift the peppers to a high position and then place them into a vehicle or other location through the discharge port.

[0031] Fourth embodiment: An improvement upon the first embodiment. As shown in Figure 13, the drum screen 5 has a wall formed by multiple annular lines 15, and its screen openings are vertical annular screen openings. These annular lines 15 are preferably spiral lines as shown in Figure 14, which are very convenient to manufacture. Experiments have shown that this drum screen significantly enhances the screening effect and has a very promising market prospect.

[0032] An elevator 14 is installed after the drum screen 5 and the conveyor belt 6. The elevator is an existing product with a conveyor belt and a material carrier plate inside, which can lift the pepper fruits to a high position and then place them into vehicles or other locations through the discharge port.

[0033] Fifth embodiment: Based on the aforementioned embodiments, the structure of the conveyor belt is improved. As shown in Figure 15, a scraper 16 is mounted on the outer surface of the conveyor belt. The scraper can be a strip, protruding from the surface of the conveyor belt. After installing the scraper, the forced pushing effect of the conveyor belt on the material is significantly enhanced.

[0034] Similarly, as shown in Figure 16, multiple scraper teeth 17 are installed on the surface of the conveyor belt. The scraper teeth are thin rods that can be straight or bent. Their ends are inserted into the material, resulting in a more prominent pushing effect.

[0035] The above-mentioned conveyor belt is more suitable for the following working mode: As shown in Figure 17, the conveyor belt 6 rotates counterclockwise, that is, the upper belt moves forward and the lower belt moves backward. The scraper or scraper teeth under the lower belt are inserted into the material, which can better push the material out of the drum screen.

[0036] Sixth embodiment: Based on the aforementioned embodiments, another structure is provided. As shown in Figures 18 and 19, the rear end of the drum screen 5 is sealed by a thin plate 19, with a forced discharge port 20 in the middle of the thin plate. Multiple material support plates 18 are mounted on the inner wall of the rear section of the drum screen. Each material support plate can be a rectangular plate, with one side fixed to the inner wall of the drum screen and the other side extending into the drum screen. The front part of the conveyor belt 6 is inserted into the forced discharge port 20 and faces the material support plate 18.

[0037] During operation, the conveyor belt rotates clockwise, meaning the upper belt moves backward and the lower belt moves forward. Because the thin plate blocks the other outlets at the rear of the drum screen, the material cannot flow out by its own weight and can only be conveyed upward with the pallet. When the material reaches the top of the conveyor belt, it can fall onto the conveyor belt by gravity and then be pushed out of the drum screen by the conveyor belt.

[0038] Experiments have shown that this structure is highly effective when the material has high moisture content and many impurities, making it prone to clogging, and the function of the rear outlet of the drum screen has been lost. Analysis suggests that without sealing, material would accumulate at the outlet, quickly filling it, significantly increasing the rotational resistance of the drum screen, and potentially causing it to stop or be damaged. After sealing with thin plates, the material has no outlet and is less prone to accumulation. Material reaching the end point cannot slide outwards but moves upwards with the support plate, naturally falling from a high point and then being caught by the conveyor belt and forcibly pushed out.

Claims

1. A chili anti-clogging screening machine, comprising a feeding hopper (3), a crushing chamber (4), and a drum screen (5), wherein the drum screen (5) is cylindrical, and the cylinder wall is covered with sieve openings that can screen out broken chili stems and leaves while retaining chili fruits, characterized in that: The rear end of the drum screen (5) is equipped with a collection conveyor belt (6), which is a closed-loop plate belt. The front and rear ends of the collection conveyor belt (6) are supported by rotating shafts (10). The rotating shafts (10) are installed on the frame (1) outside the drum screen (5) through brackets (11). One of the rotating shafts (10) is driven by the power machine (2). The front end of the collection conveyor belt (6) extends into the drum screen (5).

2. The chili anti-clogging screening machine according to claim 1, characterized in that: The screen wall of the drum screen (5) is a grid composed of intersecting lines.

3. The chili anti-clogging screening machine according to claim 1, characterized in that: The screen wall of the drum screen (5) is formed by multiple slender rods placed in front and behind.

4. The chili anti-clogging screening machine according to claim 1, characterized in that: The screen wall of the drum screen (5) is formed by multiple annular lines (15).

5. The chili anti-clogging screening machine according to claim 1, characterized in that: The drum screen (5) is mounted on the frame (1) and supported by rotatable rollers (9) on both sides of the frame (1). One roller (9) is an active roller (9-1), and the other roller (9) is a passive roller (9-2). The active roller (9-1) can rotate under the drive of the transmission shaft (8), and the active roller (9-1) drives the drum screen (5) to rotate.

6. The chili anti-clogging screening machine according to claim 5, characterized in that: The front of the frame (1) is equipped with a power unit (2). The drive shaft (8) of the power unit (2) extends backward and drives at least two active rollers (9-1). It then drives the shaft of the elevator (14) through a reversing mechanism. The other end of the shaft of the elevator (14) drives the shaft (10) of the conveyor belt (6).

7. The chili anti-clogging screening machine according to claim 1, characterized in that: The outer surface of the conveyor belt (6) is equipped with scrapers (16) or scraper teeth (17).

8. The chili anti-clogging screening machine according to claim 1, characterized in that: The conveyor belt (6) rotates clockwise, that is, the upper belt (6-1) moves backward and the lower belt (6-2) moves forward, and the material of the drum screen (5) flows out from below the lower belt (6-2) or is forcibly discharged from above the upper belt (6-1).

9. The chili anti-clogging screening machine according to claim 1, characterized in that: The conveyor belt (6) rotates counterclockwise, that is, the upper belt (6-1) moves forward and the lower belt (6-2) moves backward. The scraper (16) or scraper tooth (17) below the lower belt (6-2) pushes the material out of the drum screen (5).

10. The chili anti-clogging screening machine according to claim 1, characterized in that: The rear end of the drum screen (5) is sealed by a thin plate (19), and a strong discharge port (20) is opened in the middle of the thin plate (19). Multiple material support plates (18) are installed on the inner wall of the rear section of the drum screen (5). One side of the material support plate (18) is fixed to the inner wall of the drum screen (5), and the other side extends into the drum screen (5). The front part of the conveyor belt (6) is inserted into the strong discharge port (20) and is opposite to the material support plate (18). The conveyor belt (6) rotates clockwise, that is, the upper belt (6-1) moves backward and the lower belt (6-2) moves forward. The material below the conveyor belt (6) moves upward with the material support plate (18), falls down onto the conveyor belt (6) by gravity above the conveyor belt (6), and is then pushed out of the drum screen (5) by the conveyor belt (6).

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