Rice stoning machine

Abstract

A rice stoning machine belongs to the technical field of rice processing and comprises a box body, supporting arms are symmetrically arranged on the left side wall and the right side wall of the box body, a feeding opening is formed in the middle of the top end of the box body and communicated with an inner cavity of the box body, and discharging channels are formed in the left side wall and the right side wall of the feeding opening respectively. According to the rice stone removing and screening device, the normal stone removing and screening effect of rice can be guaranteed, screened stones can be promoted to be accumulated at the intersection of the first screening net and the inner side wall of the box body, and subsequent rice can still slide down along with the surface of the first screening net to be subjected to stone removing and screening in a normal procedure; screened stones cannot cause area occupation and other adverse effects on subsequent stone removal processing of rice, the stone removal device is more reasonable compared with a traditional mode, it is guaranteed that the rice stone removal operation is effectively carried out, it can be guaranteed that the rice automatically slides down and is screened in the whole stroke from the high position to the low position of the surface of the first screening net, and the stone removal effect is better.

Description

Technical Field

[0001] This utility model belongs to the field of rice processing technology, specifically relating to a rice destoner. Background Technology

[0002] Rice destoners are essential equipment in rice processing. They can efficiently remove impurities such as stones and clods mixed in with rice. Through screening and air separation technologies, they can separate rice from impurities by taking advantage of the differences in density and shape, thereby improving the purity of rice, ensuring smooth subsequent processing, reducing equipment wear, and producing high-quality rice.

[0003] A related technology (publication number CN216297015U) discloses a rice destoner, comprising: an input pipe with a filter structure at its input end; a shell, the upper structure of which is a cuboid and the lower structure a trapezoidal shape, wider at the top and narrower at the bottom; the shell includes an inlet connected to the output end of the input pipe, a drive belt at the inlet end, an outlet, and a fan mounted on the inner wall of the shell; a stirring device, located in the lower structure, comprising a rotating shaft and a flapper mounted on the rotating shaft; and a drive device that drives the rotating shaft to rotate. The rice destoner of this invention has the advantages of simple structure and good destone removal effect.

[0004] Existing rice destoners typically use a vibrating motor to drive the equipment to vibrate, which in turn causes the rice to be screened on a horizontally positioned vibrating screen. While this method can achieve the effect of destone removal, the screened stones always remain on the upper surface of the screen, occupying a portion of the screen area. This reduces the remaining area for rice destone removal and consequently lowers the destone removal efficiency. Utility Model Content

[0005] To address the problem that existing technologies, which use vibration to force rice onto a horizontally positioned vibrating screen for destoning, result in stones remaining on the upper surface of the screen, occupying a portion of the screen area and reducing the remaining area for rice destoning, thus lowering destoning efficiency, this invention provides a rice destoning machine. This machine not only ensures normal destoning and screening of rice but also promotes the accumulation of stones at the intersection of the first screening screen and the inner wall of the machine. Furthermore, subsequent rice can still slide down the surface of the first screening screen for normal destoning and screening. The stones do not occupy the screening area or cause other adverse effects on subsequent rice destoning processing. This method is more efficient than traditional methods, ensuring effective rice destoning. The specific technical solution is as follows:

[0006] A rice destoning machine includes a housing with symmetrically arranged support arms on its left and right side walls. A feeding port is installed at the center of the top of the housing, communicating with the inner cavity of the housing. Feeding channels are respectively opened on the left and right side walls of the feeding port. Four support blocks are symmetrically arranged on the left and right side walls of the inner wall of the housing, with each pair of support blocks forming a group. The top of the upper group of support blocks is fitted with two first screening screens, which are connected to the bottom of the side wall of the feeding port. The two first screening screens are inclined downwards from the feeding port towards the support blocks. The top of the lower group of support blocks is fitted with two second screening screens, with a groove between the two second screening screens. The two second screening screens are inclined downwards from the support blocks towards the groove.

[0007] In the above technical solution, the groove is configured as a U-shape.

[0008] In the above technical solution, the two first screening nets have a non-porous area on the side near the feeding port, and the first screening nets have a perforated area near the inner wall of the box. The intersection of the non-porous area and the perforated area of ​​the first screening net is located above the second screening net.

[0009] In the above technical solution, a stone collection box is detachably provided in the inner cavity of the groove, and a receiving bin is symmetrically provided on the left and right sides of the bottom of the box. Each receiving bin is provided with an electromagnetic valve at its output end.

[0010] Each of the second screening meshes is positioned vertically corresponding to the position of each of the receiving bins.

[0011] In the above technical solution, a connecting rod is installed on the front side wall of the stone collection box, a handle is installed on the front side of the connecting rod, a through groove is opened on the front side wall of the box, and the stone collection box is slidably inserted into the inner cavity of the through groove.

[0012] In the above technical solution, the front side wall of the box is provided with a limiting component for limiting the stone collection box;

[0013] The limiting components are provided in two sets. Each set of the limiting components includes a seat fixedly installed on the front side wall of the housing. A movable rod is slidably embedded in the seat. A limiting plate is installed on the movable rod. A limiting wedge is installed on the side wall of the limiting plate. The limiting wedge slides out of the inner cavity of the seat. A spring is sleeved on the movable rod. One end of the spring is connected to the outer wall of the movable rod, and the other end of the spring is fixedly connected to the inner side wall of the seat.

[0014] In the above technical solution, a discharge port is provided at the junction of the first screening mesh and the box body, and a door is rotatably provided on the outer wall of the box body.

[0015] In the above technical solution, the position of the door corresponds to the position of the discharge port.

[0016] The rice destoner of this utility model has the following advantages compared with the prior art:

[0017] I. Regarding the traditional method of destoning rice by vibrating it on a horizontally set vibrating screen, the stones always remain on the upper surface of the screen, occupying part of the screen area and reducing the remaining area for rice destoning, thus reducing destoning efficiency. This utility model, by setting an inclined first screening screen, not only ensures normal destoning of rice, but also promotes the accumulation of stones at the intersection of the first screening screen and the inner side wall of the box. The rice can still slide down the surface of the first screening screen for normal destoning. The stones will not occupy the area or have other adverse effects on the subsequent rice destoning process. Compared with the traditional method, this is more reasonable and ensures the effective operation of rice destoning.

[0018] II. By setting an inlet and a feeding channel between two first screening screens, this utility model can cause the rice fed into the inlet to enter the upper surface of the corresponding first screening screen through the two sets of feeding channels on both sides. It can also ensure that the rice automatically slides down from the high point to the low point of the first screening screen surface for screening throughout the entire process, resulting in better destone removal. Furthermore, the two paths on the left and right can perform destone removal processing simultaneously, thereby improving destone removal efficiency.

[0019] Third, in this utility model, by setting two sets of second screening screens, the rice can be further processed in conjunction with the first screening screen to remove stones in a second time, avoiding the situation where some stones are missed due to traditional single stone removal. Moreover, the rice that meets the requirements after stone removal can automatically enter the receiving hopper for collection. The stones that are screened out are collected and discharged through the door and the stone collection box respectively, which can realize the centralized collection and processing of stones.

[0020] Fourth, this utility model has an automatic locking function for embedding the stone collection box into the groove, eliminating the need for extra steps and making the insertion and positioning of the stone collection box more convenient, effectively ensuring the rapid operation of removing stones from rice.

[0021] V. In this utility model, the two sets of first screening screens are inclined downward from the middle to both sides, and the two sets of second screening screens are inclined upward from the middle to both sides. This ensures that during the two screening and stone removal processes, the mixture of rice and stones can pass through the entire surface of the first and second screening screens as much as possible. In other words, it increases the path for the rice to roll and screen, ensuring that the rice rolls down a sufficiently long path to automatically separate the stones and rice, resulting in a better separation effect.

[0022] In summary, this invention not only ensures normal destoning and sieving of rice, but also promotes the accumulation of pebbles at the intersection of the first screening screen and the inner wall of the box. The rice continues to slide down the surface of the first screening screen for normal destoning and sieving, preventing the pebbles from occupying space or causing other adverse effects on the subsequent rice destoning process. Compared to traditional methods, this is more reasonable, ensuring effective rice destoning. It also ensures that the rice automatically slides down the surface of the first screening screen from a high point to a low point throughout the entire process, resulting in better destoning. Furthermore, the two paths can perform destoning simultaneously, improving efficiency. In addition, it ensures that the mixture of rice and pebbles passes over the entire surface of both the first and second screening screens during the two sieving processes, increasing the path for the rice to roll down and ensuring that the rice automatically rolls down a sufficiently long path to separate the pebbles and rice, resulting in superior separation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the box body of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the first screening screen of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the door body of this utility model;

[0026] Figure 4 This is a cross-sectional structural diagram of the base of this utility model;

[0027] Figure 5 for Figure 1 Enlarged view of point A;

[0028] Figures 1 to 5 In the middle, 1. Box body, 2. Support arm, 3. Feeding port, 4. Feeding channel, 5. Support block, 6. First screening screen, 7. Groove, 8. Second screening screen, 9. Stone collection box, 10. Connecting rod, 11. Handle, 12. Material receiving bin, 13. Solenoid valve, 14. Through groove, 15. Seat, 16. Moving rod, 17. Limiting plate, 18. Limiting wedge, 19. Spring, 20. Door body. Detailed Implementation

[0029] The following are specific implementation cases and appendices. Figures 1 to 5 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0030] See Figures 1 to 5As shown, a rice destoning machine includes a housing 1. Support arms 2 are symmetrically arranged on the left and right side walls of the housing 1. A feeding port 3 is installed at the top center of the housing 1, and the feeding port 3 is connected to the inner cavity of the housing 1. Feeding channels 4 are respectively opened on the left and right side walls of the feeding port 3. Four support blocks 5 are symmetrically arranged on the left and right side walls of the inner side walls of the housing 1. Each pair of support blocks 5 is a group. The top of the upper group of support blocks 5 is equipped with two first screening screens 6, which are respectively connected to the bottom of the side wall of the feeding port 3. The two first screening screens 6 are inclined downward from the feeding port 3 towards the support blocks 5. The top of the lower group of support blocks 5 is equipped with two second screening screens 8, and a groove 7 is installed between the two second screening screens 8. The two second screening screens 8 are inclined downward from the support blocks 5 towards the groove 7. Specifically, the groove 7 is U-shaped, which provides an installation position for the installation of other components.

[0031] The mixture of rice and pebbles to be destoned is fed into the inlet 3. The mixture rolls down through two feeding channels 4 to the first screening screens 6 on both sides. The mixture rolling down the surface of the first screening screen 6 causes the pebbles to stay on the upper surface of the first screening screen 6 and accumulate at the junction of the first screening screen 6 and the inner wall of the box 1. The rice enters the second screening screen 8 at the bottom through the holes of the first screening screen 6. With the action of the inclined second screening screen 8, the rice undergoes secondary destone screening. The rice enters the receiving bin 12 for collection through the holes of the second screening screen 8. The pebbles screened on the upper surface of the second screening screen 8 slide down the surface of the second screening screen 8 and are collected in the stone collection box 9.

[0032] This invention not only ensures the normal destoning and screening effect of rice, but also promotes the accumulation of pebbles at the intersection of the first screening screen 6 and the inner wall of the box 1. Furthermore, the rice can still slide down the surface of the first screening screen 6 for normal destoning and screening. The pebbles will not occupy the area or cause other adverse effects on the subsequent rice destoning process. Compared with traditional methods, this is more reasonable, ensuring the effective operation of rice destoning. It also ensures that the rice automatically slides down the surface of the first screening screen 6 from a high point to a low point throughout the entire process, resulting in better destoning. Moreover, the left and right paths can perform destoning simultaneously, improving destoning efficiency.

[0033] For details, please refer to the main references. Figure 2As shown, the two first screening screens 6 have a non-perforated area on the side near the feeding port 3, and a perforated area near the inner wall of the box 1. The intersection of the non-perforated area and the perforated area of ​​the first screening screen 6 is located above the second screening screen 8. By setting the non-perforated area, it can be ensured that the material at the feeding channel 4 automatically slides down normally along the upper surface of the first screening screen 6, and it can be ensured that the material falling from the perforated screening section of the first screening screen 6 can at least land on the upper surface of the second screening screen 8, and the material at the first screening screen 6 will not fall directly down through the first screening screen 6 into the inner cavity of the stone collection box 9.

[0034] Main references Figure 2 As shown, a stone collection box 9 is detachably installed inside the groove 7. A receiving bin 12 is symmetrically arranged on the left and right sides of the bottom of the box body 1. Each receiving bin 12 has an output valve 13. Each second screening screen 8 is positioned vertically corresponding to each receiving bin 12. The opening of the solenoid valve 13 allows for the discharge of rice that meets the requirements from the receiving bin 12. A connecting rod 10 is installed on the front wall of the stone collection box 9, and a handle 11 is installed on the front side of the connecting rod 10. A through groove 14 is opened on the front wall of the box body 1, and the stone collection box 9 is slidably inserted into the cavity of the through groove 14. The stone collection box 9 can collect the stones screened by the second screening screen 8 for subsequent centralized processing.

[0035] Main references Figures 2 to 5 As shown, the front side wall of the box 1 is provided with a limiting component for limiting the stone collection box 9; there are two sets of limiting components, each set of limiting components includes a seat 15 fixedly installed on the front side wall of the box 1, a moving rod 16 is slidably embedded in the seat 15, a limiting piece 17 is installed on the moving rod 16, a limiting wedge 18 is installed on the side wall of the limiting piece 17, the limiting wedge 18 slides out of the inner cavity of the seat 15, and a spring 19 is sleeved on the moving rod 16, one end of the spring 19 is connected to the outer wall of the moving rod 16, and the other end of the spring 19 is fixedly connected to the inner side wall of the seat 15;

[0036] When reinstalling the used stone collection box 9 into the inner cavity of the groove 7, align the stone collection box 9 with the groove 7 and push it directly to the rear. During this process, the side wall of the stone collection box 9 causes the limiting wedge 18 to automatically retract into the corresponding inner cavity of the seat 15 and compress the spring 19. When the stone collection box 9 is fully embedded in the groove 7, the elastic force of the spring 19 drives the limiting wedge 18 to extend outward from the inner cavity of the seat 15. With the extension of the limiting wedge 18 out of the rear side wall of the seat 15, the stone collection box 9 can be prevented from moving forward out of the inner cavity of the groove 7, thus achieving automatic locking after the stone collection box 9 is inserted into the inner cavity of the groove 7.

[0037] Main references Figure 2 and Figure 3As shown, a discharge port is provided at the junction of the first screening screen 6 and the box body 1. A door 20 is rotatably provided on the outer wall of the box body 1. The stones at the first screening screen 6 are discharged and cleaned outward through the opened door 20. The driving limit wedge 18 is retracted into the inner cavity of the seat body 15, which causes the spring 19 to be compressed until the limit wedge 18 is completely embedded in the inner cavity of the seat body 15 and no longer limits the stone collection box 9. Pulling the handle 11 forward can cause the stone collection box 9 to move forward and disengage from the inner cavity of the groove 7, so as to realize the centralized processing of the stones collected in the stone collection box 9.

[0038] Specifically, the position of the gate 20 corresponds to the position of the discharge port, thereby ensuring that the stones screened out at the first screening screen 6 can be accurately discharged to the outside through the gate 20.

[0039] It is worth noting that in this application, the solenoid valve 13 is a commonly used solenoid valve on the market, which can control the opening or closing of the bottom of the receiving bin 12. It is sufficient to meet the usage requirements. There is no need to limit the model of the above-mentioned existing components or to elaborate on them in too much detail.

[0040] The working principle of a rice destoner in this embodiment is as follows:

[0041] The mixture of rice and pebbles to be destoned is fed into the inlet 3. The mixture rolls down through two feeding channels 4 to the first screening screens 6 on both sides. The mixture rolling down the surface of the first screening screen 6 causes the pebbles to stay on the upper surface of the first screening screen 6 and accumulate at the junction of the first screening screen 6 and the inner wall of the box 1. The rice enters the second screening screen 8 at the bottom through the holes of the first screening screen 6. With the action of the inclined second screening screen 8, the rice undergoes secondary destone screening. The rice enters the receiving bin 12 for collection through the holes of the second screening screen 8. The pebbles screened on the upper surface of the second screening screen 8 slide down the surface of the second screening screen 8 and are collected in the stone collection box 9.

[0042] Subsequently, the solenoid valve 13 can be opened to discharge the rice that meets the requirements in the receiving bin 12. The stones at the first screening screen 6 can be discharged and cleaned outwards through the opened door 20. The limit wedge 18 is driven to retract into the inner cavity of the seat 15, causing the spring 19 to be compressed until the limit wedge 18 is completely embedded in the inner cavity of the seat 15 and no longer limits the stone collection box 9. Pulling the handle 11 forward can cause the stone collection box 9 to move forward and disengage from the inner cavity of the groove 7, so as to realize the centralized processing of the stones collected in the stone collection box 9.

[0043] This invention not only ensures normal destoning and sieving of rice, but also promotes the accumulation of pebbles at the intersection of the first screening screen 6 and the inner wall of the box 1. The rice continues to slide down the surface of the first screening screen 6 for normal destoning and sieving, preventing the pebbles from occupying space or causing other adverse effects on the subsequent rice destoning process. Compared to traditional methods, this is more reasonable, ensuring effective rice destoning. It also ensures that the rice automatically slides down the surface of the first screening screen 6 from high to low, resulting in better destoning. Furthermore, the two paths can perform destoning simultaneously, improving efficiency. In addition, it ensures that the mixture of rice and pebbles passes through the entire surface of the first and second screening screens 8 during the two sieving processes, increasing the path for rice to roll down and ensuring that the rice automatically rolls down a sufficiently long path to separate the pebbles and rice, resulting in superior separation.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rice destoner, comprising a housing (1), characterized in that: The box (1) is symmetrically provided with support arms (2) on the left and right side walls. The box (1) is provided with a feeding port (3) at the top center. The feeding port (3) is connected to the inner cavity of the box (1). The feeding port (3) is provided with a feeding channel (4) on the left and right side walls respectively. The inner side wall of the box (1) is symmetrically provided with four support blocks (5). Each pair of support blocks (5) is set as a group. The top of the support block (5) located at the top of the upper group is provided with two first screening screens (6). The two first screening screens (6) are connected to the bottom of the side wall of the feeding port (3) respectively. The two first screening screens (6) are inclined from the feeding port (3) towards the support block (5) in a downward trend. The top of the support block (5) located at the bottom group is provided with two second screening screens (8). A groove (7) is provided between the two second screening screens (8). The two second screening screens (8) are inclined from the support block (5) towards the groove (7) in a downward trend.

2. The rice destoner according to claim 1, characterized in that: The groove (7) is U-shaped.

3. The rice destoner according to claim 1, characterized in that: The two first screening meshes (6) have a non-porous area on the side near the feeding port (3), and a perforated area is provided near the inner wall of the box (1). The intersection of the non-porous area and the perforated area of ​​the first screening mesh (6) is located above the second screening mesh (8).

4. A rice destoner according to claim 1, characterized in that: The groove (7) is provided with a stone collection box (9) that can be plugged in and removed. The bottom of the box (1) is provided with a receiving bin (12) on the left and right sides. Each receiving bin (12) is provided with an electromagnetic valve (13) at its output end. Each of the second screening meshes (8) is positioned vertically corresponding to each of the receiving bins (12).

5. A rice destoner according to claim 4, characterized in that: A connecting rod (10) is installed on the front side wall of the stone collection box (9), and a handle (11) is installed on the front side of the connecting rod (10). A through groove (14) is opened on the front side wall of the box body (1), and the stone collection box (9) is slidably inserted into the cavity of the through groove (14).

6. A rice destoner according to claim 4, characterized in that: The front side wall of the box (1) is provided with a limiting component for limiting the stone collection box (9); The limiting components are provided in two sets. Each set of the limiting components includes a seat (15) fixedly installed on the front side wall of the housing (1). A moving rod (16) is slidably embedded in the seat (15). A limiting piece (17) is installed on the moving rod (16). A limiting wedge (18) is installed on the side wall of the limiting piece (17). The limiting wedge (18) slides out of the inner cavity of the seat (15). A spring (19) is sleeved on the moving rod (16). One end of the spring (19) is connected to the outer wall of the moving rod (16), and the other end of the spring (19) is fixedly connected to the inner side wall of the seat (15).

7. A rice destoner according to claim 1, characterized in that: A discharge port is provided at the junction of the first screening mesh (6) and the box (1), and a door (20) is rotatably provided on the outer wall of the box (1).

8. A rice destoner according to claim 7, characterized in that: The position of the gate (20) corresponds to the position of the discharge port.

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