A pretreatment device for detecting heavy metals in rice

Abstract

This utility model discloses a pretreatment device for heavy metal detection in rice, including a device shell. Support blocks are installed on the inner wall of each corner of the shell, and each support block is equipped with a spring. Several springs are connected to the same hopper, one end of which is open. A rotating roller is driven by a motor, causing it to move eccentrically in a circular motion along the motor's output shaft. This, in turn, causes the cylinder to move in a circular motion, resulting in the hopper's circular motion. Through the flexible connection of the springs, when the hopper compresses the springs, the hopper's movement slows down; when the hopper moves upward, the springs return to their original position. The instantaneous elastic force causes the rice in the hopper to move in an inclined direction. While the sieve plate performs vibration screening, the screened impurities and the screened rice are bounced and conveyed to the same end. Compared with existing technologies, this effectively avoids clogging of the holes in the sieve plate, achieves vibration screening, and is easy to operate without the need for manual adjustment or control.

Description

Technical Field

[0001] This utility model relates to the field of heavy metal detection pretreatment technology, and in particular to a heavy metal detection pretreatment device in rice. Background Technology

[0002] The grain produced by rice is paddy. After removing the husk, paddy is called brown rice. After milling away the bran layer, white rice is obtained. Nearly half of the world's population relies on rice as their staple food. In addition to being edible, rice can also be used to brew alcohol, make sugar, and as an industrial raw material. Rice husks and straw can be used as livestock feed. However, with increasing public concern about food safety, especially the excessive levels of metals in rice, it is now necessary to test rice for these substances before it is sold on the market.

[0003] Utility model CN218223465U discloses a sample pretreatment device for detecting cadmium in rice, belonging to the field of food testing technology. It addresses the problem of inconvenient replacement of screens in rice screening equipment. The device includes a screening box, a hopper, and a base. The screening box contains a non-disassembly screening mechanism, and a vibration-supporting mechanism is installed between the base and the screening box. Through the non-disassembly screening mechanism, if the mesh of the screen plate horizontally placed inside the screening box becomes clogged with a large amount of impurities after a certain period of use, the operator only needs to rotate the rotating roller in the non-disassembly screening mechanism 180 degrees to interchange the two mounting frames, conveniently replacing the screen plate that was heavily clogged with impurities. Therefore, there is no need for manual disassembly of the screen plate inside the screening box; the clogged screen plate can be quickly replaced, saving time and effort and facilitating manual operation.

[0004] The existing technology replaces the sieve plate by rotating it to prevent the sieve plate holes from clogging, but this is inconvenient to operate in practice. Therefore, there is a need for a pretreatment device for heavy metal detection in rice to meet people's needs. Utility Model Content

[0005] The purpose of this invention is to provide a pretreatment device for detecting heavy metals in rice, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pretreatment device for heavy metal detection in rice, comprising a device shell, with support blocks provided on the inner wall of each corner of the device shell, each support block having a spring, several springs being arranged in the same hopper, one end of the hopper being open, a sieve plate being provided inside the hopper, the sieve plate being arranged horizontally, a motor being provided on the device shell, a rotating roller being eccentrically connected to the output shaft of the motor, a cylinder being provided at the bottom of the hopper, the rotating roller being eccentrically arranged inside the cylinder, a first rubber roller and a second rubber roller being rotatably connected inside the device shell, the first rubber roller and the second rubber roller being driven by a transmission gear and a driven gear, and the first rubber roller and the rotating roller being connected by a synchronous belt pulley set.

[0007] Preferably, the top of the device housing has a feeding port, which is far from the opening end of the hopper.

[0008] Preferably, the device housing has a cleaning port on the side near the hopper opening, and the screen plate extends through the cleaning port to the outside of the device housing.

[0009] Preferably, the device housing is provided with two guide plates, which are inclined symmetrically to each other, and the ends of the guide plates that are close to each other correspond to the points where the first rubber roller and the second rubber roller are close to each other.

[0010] Preferably, the diameter of the transmission gear is twice the diameter of the driven gear.

[0011] Preferably, a partition is provided at the top of the device housing. The partition is arranged vertically, offset from the first rubber roller and the second rubber roller, and located below the second rubber roller.

[0012] Preferably, a first discharge port and a second discharge port are provided on one side of the device housing. The first discharge port is connected to the side of the partition plate near the first rubber roller, and the second discharge port is connected to the side of the partition plate near the second rubber roller.

[0013] The beneficial effects of this utility model are:

[0014] In this invention, a motor drives a rotating roller, causing it to move eccentrically in a circular motion along the motor's output shaft. This, in turn, causes the cylinder to move in a circular motion, which in turn causes the hopper to move in a circular motion. Through a flexible connection with a spring, the hopper's movement slows down when the spring is compressed, and returns to its original position when the hopper moves upward. The instantaneous elastic force causes the rice in the hopper to move in an inclined direction. While the screen plate achieves vibration screening, the screened impurities and the screened rice are bounced and conveyed to the same end. Compared with the prior art, this invention effectively avoids the clogging effect of the holes in the screen plate, achieves the vibration screening effect, and is easy to operate without the need for manual adjustment and control.

[0015] In this invention, the transmission connection between the rotating roller and the first rubber roller, as well as the transmission effect between the first rubber roller and the second rubber roller, allows the rice to be squeezed by the relative rotation between the first rubber roller and the second rubber roller after screening, thereby achieving the separation of rice grains from the outer shell and further improving the functionality of the pretreatment device. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of a pretreatment device for detecting heavy metals in rice proposed in this utility model;

[0017] Figure 2 This is a rear view structural schematic diagram of a pretreatment device for detecting heavy metals in rice proposed in this utility model;

[0018] Figure 3 This is a front cross-sectional view of the pretreatment device for detecting heavy metals in rice proposed in this utility model.

[0019] Figure 4 This is a side view cross-sectional structural diagram of a pretreatment device for detecting heavy metals in rice proposed in this utility model;

[0020] Figure 5 This is a top view cross-sectional schematic diagram of a pretreatment device for detecting heavy metals in rice proposed in this utility model.

[0021] In the diagram: 1. Device casing; 2. Support block; 3. Spring; 4. Hopper; 5. Screen plate; 6. Motor; 7. Rotating roller; 8. Cylinder; 9. First rubber roller; 10. Second rubber roller; 11. Transmission gear; 12. Driven gear; 13. Synchronous belt pulley set; 14. Feed port; 15. Impurity removal port; 16. Guide plate; 17. Baffle plate; 18. First discharge port; 19. Second discharge port. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-5A pretreatment device for heavy metal detection in rice includes a housing 1. Support blocks 2 are provided on the inner wall of each corner of the housing 1. A spring 3 is provided on each support block 2. Several springs 3 are arranged in the same hopper 4. One end of the hopper 4 is open. A sieve plate 5 is provided inside the hopper 4, arranged horizontally. A motor 6 is installed on the housing 1. A rotating roller 7 is eccentrically connected to the output shaft of the motor 6. A cylinder 8 is provided at the bottom of the hopper 4. The rotating roller 7 is eccentrically arranged inside the cylinder 8. A first rubber roller 9 and a second rubber roller 10 are rotatably connected inside the housing 1. The first rubber roller 9 and the second rubber roller 10 are driven by a transmission gear 11 and a driven gear 12. The first rubber roller 9 and the rotating roller 7 are connected by a synchronous pulley set 13.

[0024] The rotating roller 7 is driven by the motor 6, causing it to move eccentrically in a circular motion along the output shaft of the motor 6. This, in turn, causes the cylinder 8 to move in a circular motion, which in turn causes the hopper 4 to move in a circular motion. Through the flexible connection of the spring 3, when the hopper 4 compresses the spring 3, the movement of the hopper 4 slows down. When the hopper 4 moves upward, the spring 3 returns to its original position. The instantaneous elastic force causes the rice on the hopper 4 to move in an inclined direction. While the sieve plate 5 performs vibration screening, the screened impurities and the screened rice are bounced and conveyed to the same end. The screened rice is conveyed from the hopper 4 to the first rubber roller 9 and the second rubber roller 10. Through the cooperation between the rotating roller 7, the first rubber roller 9 and the synchronous belt pulley group 13, and the cooperation between the first rubber roller 9, the second rubber roller 10, the transmission gear 11 and the driven gear 12, the relative rotation between the first rubber roller 9 and the second rubber roller 10 after screening compresses the rice, achieving the separation of rice grains from the outer shell, thereby further improving the functionality of the pretreatment device.

[0025] Specifically, in this embodiment, a feeding port 14 is provided on the top of the outer shell 1 of the device. The feeding port 14 is far away from the opening end of the hopper 4. The opening end of the hopper 4 is the rice screening and discharge end. By increasing the rice screening and conveying distance, sufficient time is provided for rice screening to ensure the screening effect.

[0026] Specifically, in this embodiment, a cleaning port 15 is provided on the side of the device housing 1 near the opening end of the hopper 4. The screen plate 5 extends through the cleaning port 15 to the outside of the device housing 1, so that the screened impurities can be smoothly discharged from the cleaning port 15 into the device housing 1 and completely separated from the rice without the need for manual cleaning.

[0027] Specifically, in this embodiment, two guide plates 16 are provided inside the outer casing 1 of the device. The two guide plates 16 are inclined and symmetrical to each other, and their close ends correspond to the close points of the first rubber roller 9 and the second rubber roller 10, so as to ensure that the rice after screening can be smoothly guided by the guide plates 16 and automatically slide down between the first rubber roller 9 and the second rubber roller 10 for the outer shell removal operation.

[0028] Specifically, in this embodiment, the diameter of the transmission gear 11 is twice the diameter of the driven gear 12, which achieves the effect that the rotational speed of the second rubber roller 10 is higher than that of the first rubber roller 9. As a result, after the rice husk is removed, due to the greater weight of the rice grain than the husk, the rice grain falls almost vertically, and the husk shifts to one side of the second rubber roller 10, thus achieving the separation effect of the husk and the rice grain.

[0029] Specifically, in this embodiment, a partition 17 is provided at the top of the device housing 1. The partition 17 is arranged vertically and is positioned away from the first rubber roller 9 and the second rubber roller 10, and is located below the second rubber roller 10. The partition 17 allows the housing and rice grains to be collected separately.

[0030] Specifically, in this embodiment, a first discharge port 18 and a second discharge port 19 are provided on one side of the device housing 1. The first discharge port 18 is connected to the side of the partition 17 near the first rubber roller 9, and the second discharge port 19 is connected to the side of the partition 17 near the second rubber roller 10. The first discharge port 18 is the rice grain outlet, and the second discharge port 19 is the housing outlet.

[0031] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A device for pre-treatment of heavy metal detection in rice, comprising a device housing (1), characterized in that: Each corner of the device housing (1) is provided with a support block (2) on its inner wall. Each support block (2) is provided with a spring (3). Several springs (3) are provided with the same hopper (4). One end of the hopper (4) is open. A screen plate (5) is provided inside the hopper (4). The screen plate (5) is arranged horizontally. A motor (6) is provided on the device housing (1). A rotating roller (7) is eccentrically connected to the output shaft of the motor (6). A cylinder (8) is provided at the bottom of the hopper (4). The rotating roller (7) is eccentrically arranged inside the cylinder (8). A first rubber roller (9) and a second rubber roller (10) are rotatably connected inside the device housing (1). The first rubber roller (9) and the second rubber roller (10) are driven by a transmission gear (11) and a driven gear (12). The first rubber roller (9) and the rotating roller (7) are connected by a synchronous belt pulley group (13).

2. The pretreatment device for heavy metal detection in rice according to claim 1, characterized in that: The device housing (1) has a feeding port (14) at the top, which is far from the opening end of the hopper (4).

3. The pretreatment device for heavy metal detection in rice according to claim 1, characterized in that: The device housing (1) has a cleaning port (15) on one side near the opening end of the hopper (4), and the screen plate (5) extends through the cleaning port (15) to the outside of the device housing (1).

4. The pretreatment device for heavy metal detection in rice according to claim 1, characterized in that: The device housing (1) is provided with two guide plates (16). The two guide plates (16) are inclined symmetrically to each other, and their ends that are close to each other correspond to the points where the first rubber roller (9) and the second rubber roller (10) are close to each other.

5. The pretreatment device for heavy metal detection in rice according to claim 1, characterized in that: The diameter of the transmission gear (11) is twice the diameter of the driven gear (12).

6. The pretreatment device for heavy metal detection in rice according to claim 1, characterized in that: A partition (17) is provided on the top of the device housing (1). The partition (17) is arranged vertically, offset from the first rubber roller (9) and the second rubber roller (10), and located below the second rubber roller (10).

7. The pretreatment device for heavy metal detection in rice according to claim 1, characterized in that: The device housing (1) has a first discharge port (18) and a second discharge port (19) on one side. The first discharge port (18) is connected to the side of the partition (17) near the first rubber roller (9), and the second discharge port (19) is connected to the side of the partition (17) near the second rubber roller (10).

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