A grain breakage screening detection apparatus

Abstract

The utility model belongs to the field of cereal broken detection, specifically provide a kind of cereal broken rate screening detection equipment, including support base, screening mechanism is arranged on support base, including screening material box, screening material box is equipped with vibration motor, screening material box is equipped with screen mechanism, including screen, the screen pivot of end is rotatably installed in screening material box side wall, weighing mechanism is equipped below screening material box, including weighing material box, weighing material box is installed on weighing sensor, the outlet end of weighing material box is arranged metering valve plate, the valve plate pivot of both ends of metering valve plate is rotatably installed on weighing material box side wall, screen pivot and valve plate pivot are all driven by driving mechanism;Screening material box upper portion is provided with spiral sampler, and the feed end of spiral sampler is arranged in the discharge hopper of upper miller.The equipment can automatically sample, and the different particle quality is weighed, which is used for automatically detecting the mass percentage of different particles of sample, and has great significance for realizing the automation of koji making.

Description

Technical Field

[0001] This utility model relates to the field of grain breakage detection technology, and in particular to a grain breakage rate screening and detection device. Background Technology

[0002] The grinding mill is used in the koji-making production line of the liquor industry. After a preset grinding roller spacing, the mill grinds moistened whole wheat into granules, mainly half-grains and small halves (accounting for about 70% of the total mass of moistened wheat), with the remaining 20% ​​being fine wheat flour and even finer powder. The percentage of particle size of the moistened wheat particles after crushing and grinding is very important for the subsequent koji pressing and fermentation results. Therefore, it is necessary to frequently check the percentage of coarse and fine particles, and then adjust the grinding roller spacing of the mill accordingly. The traditional method is to manually sample at the mill's feed inlet, pass the sample through multiple layers of sieves with different mesh sizes, classify the sample according to particle size, and then record and calculate the percentage of different particle sizes. This method is time-consuming, and the data measured by people with different experience levels can vary greatly. It is highly dependent on experience, and often requires repeated measurements due to large data deviations. Moreover, the final data is not real-time and up-to-date, making it inadequate for adjusting the grinding roller spacing of the mill. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a grain breakage screening and detection device that can automatically sample and weigh different particle masses to automatically detect the mass percentage of different particles in the sample, which is of great significance for the automation of koji making.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a grain breakage screening and detection device, including a support base, a screening mechanism mounted on the support base via a connecting mechanism, the screening mechanism including a screening box, a vibration motor mounted on the outside of the screening box, at least one set of screen mechanisms inside the screening box, the screen mechanism including a screen, screen rotating shafts at both ends of the screen, the screen rotating shafts being rotatably mounted on the side wall of the screening box, the screen rotating shafts being driven by a drive mechanism, a weighing mechanism located at the lower outlet of the screening box, the weighing mechanism including a weighing box, the weighing box being mounted on a weighing sensor, and the weighing... The load cell is mounted on the support base and is electrically connected to the controller. A metering valve plate is installed at the outlet end of the weighing box. The two ends of the metering valve plate are equipped with valve plate shafts, which are rotatably mounted on the side wall of the weighing box. The valve plate shafts are driven by a drive mechanism. The outlet end of the weighing box is located at the discharge port of the support base. The weighing box does not contact the screening box or the support base. A spiral sampler is installed at the feed inlet at the upper end of the screening box. The feed end of the spiral sampler is located in the discharge hopper of the upper-level grinding mill, and the outlet of the spiral sampler is located above the feed inlet at the upper end of the screening box.

[0005] In a preferred embodiment, the driving mechanism includes a bracket, which is disposed outside the screening box or weighing box. An electric push rod is provided on the bracket, and a driving handle is provided at the end of the screen shaft or valve plate shaft. The telescopic end of the electric push rod is connected to the driving handle to drive the screen shaft or valve plate shaft to rotate.

[0006] In a preferred embodiment, the connecting mechanism includes several sets of spring guide rods, each with a limiting plate. The outer side of the screening box has an ear plate through which the spring guide rods pass. A spring is provided between the limiting plate and the ear plate, and the spring is fitted onto the spring guide rod. The upper end of the spring guide rod has an external thread that mates with a nut.

[0007] In a preferred embodiment, two sets of spiral samplers are provided, with each spiral sampler taking samples from the discharge ports of the two sets of grinding rollers of the upper-level grinding mill.

[0008] In a preferred embodiment, a dust cover is provided at the feed inlet at the upper end of the screening box to prevent dust from falling from the spiral sampler.

[0009] In a preferred embodiment, the weighing box includes two weighing chambers, with a guide protrusion between the two weighing chambers. The guide protrusion has two sets of guide slopes, and the weighing sensor is located at the bottom of the guide protrusion. The support base has two discharge ports corresponding to the two weighing chambers.

[0010] In a preferred embodiment, a guide cavity is provided at the bottom of the support base corresponding to the material drop port.

[0011] In a preferred embodiment, a receiving tray is provided below the material guiding cavity.

[0012] In a preferred embodiment, the support base includes a base and a plurality of support columns disposed at the bottom of the base, and the material discharge port is disposed on the base.

[0013] In a preferred embodiment, the screen mechanism comprises two sets, arranged vertically, with the aperture of the screen in the upper screen mechanism being larger than that in the lower screen mechanism.

[0014] The grain breakage screening and detection device provided by this utility model has the following beneficial effects: 1. This equipment enables continuous operation of material picking, screening, and weighing, replacing manual weighing, improving efficiency, providing real-time data feedback on the specific gravity of materials of different particle sizes, reducing the lag time of grinding roller spacing adjustment, quickly correcting particle size deviation, and reducing the production of unqualified grains.

[0015] 2. The spiral sampler takes samples from the discharge ports of the two sets of grinding rollers of the upper-level grinding mill, and obtains the output breakage rate data of each set of grinding rollers. This provides a precise basis for the independent spacing adjustment of the two sets of grinding rollers. The feed end of the sampler extends directly into the discharge hopper of the grinding mill. After starting, it automatically completes the sampling and conveys the sample to the screening box. There is no need for manual supervision next to the grinding mill, which reduces the labor intensity of the operators.

[0016] 3. An eccentric block vibrating motor is installed on the outside of the screening box, which can drive the box to vibrate up and down to prevent the grain from sticking together and clogging the screen holes due to moisture. The screening mechanism is connected to the support base through a spring guide rod. The spring can absorb the vibration energy of the vibrating motor and prevent the vibration from being transmitted to the weighing mechanism, thus preventing the weighing sensor from making errors due to vibration.

[0017] 4. The sieving box has two sets of screens, one above the other. The upper screen has a larger aperture than the lower screen, which can separate the grains into coarse particles, medium particles, and fine powder, perfectly matching the particle requirements of baijiu koji making.

[0018] 5. The valve plate shaft or screen shaft is rotated by the drive mechanism to complete the unloading of the screen or valve plate, eliminating the need for manual disassembly and dumping of materials, thus greatly improving the degree of automation.

[0019] 6. The detection data can be directly linked to the grinding mill control system to realize an automated closed loop of detection and adjustment without manual intervention, helping the koji-making production line to upgrade from semi-automation to full automation. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front view of the present invention; Figure 3 for Figure 2 A cross-sectional view along plane AA; Figure 4 This is a schematic diagram of the internal structure of the present invention; In the diagram: support base 100, base 110, material discharge port 111, support column 120, material guide cavity 130; Screening mechanism 200, screening box 210, ear plate 211, screen mechanism 220, screen 221, screen shaft 222, vibration motor 230; Connecting mechanism 300, spring guide rod 310, limiting plate 320, spring 330; Weighing mechanism 400, weighing box 410, weighing bin 411, guide protrusion 412, metering valve plate 420, valve plate shaft 430, weighing sensor 440. Drive mechanism 500, bracket 510, electric push rod 520, drive handle 530; Spiral sampler 600; Dust cover 700; Material receiving tray 800; Controller 900. Detailed Implementation

[0021] like Figures 1-4 As shown, a grain breakage screening and testing device includes a support base 100, which comprises a base 110 and several support columns 120 disposed at the bottom of the base 110. A discharge port 111 is disposed on the base 110, and the support columns 120 are fixed to the bottom of the base 110, in four sets symmetrically distributed. A guide cavity 130 is provided at the bottom of the support base 100 corresponding to the discharge port 111. A receiving tray 800 is provided below the guide cavity 130 for receiving the weighed grain. The receiving tray 800 is made of stainless steel for easy cleaning, preventing residual grain from becoming moldy and affecting subsequent testing, and enabling the recycling and reuse of materials after testing, reducing waste. The guide cavity 130 is funnel-shaped, which can accurately guide the grain discharged from the discharge port 111 into the receiving tray 800, preventing material from scattering and polluting the environment. Four sets of support columns 120 ensure that the base 110 is ≥30cm off the ground, facilitating the placement and removal of the receiving tray 800. The bottom of the support columns 120 is equipped with anti-slip pads, and the vibration displacement during equipment operation is ≤2mm, ensuring overall stability.

[0022] The screening mechanism 200 is mounted on the support base 100 via the connecting mechanism 300. The screening mechanism 200 includes a screening box 210. A vibration motor 230 is provided on the outside of the screening box 210. At least one set of screen mechanisms 220 is provided inside the screening box 210. The screen mechanism 220 includes a screen 221. Screen rotating shafts 222 are provided at both ends of the screen 221. The screen rotating shafts 222 are rotatably mounted on the side wall of the screening box 210. The screen rotating shafts 222 are driven by the drive mechanism 500.

[0023] like Figure 4 As shown, the screening box 210 has two sets of screen mechanisms 220 arranged inside, one above the other. The aperture of the upper screen 221 is larger than that of the lower screen 221, for example, 8mm for the upper screen and 4mm for the lower screen. The double screen achieves three-level grading: fine powder (≤4mm) passes through the two screens, medium particles (4-8mm) are retained on the lower screen, and coarse particles (≥8mm) are retained on the upper screen, which perfectly matches the three-level detection requirements of the koji-making industry for fine powder-medium-coarse particles.

[0024] The vibration motor 230 adopts an eccentric block design, with a vibration frequency of 50Hz and an amplitude of 2-3mm. It can drive the screening box 210 to vibrate up and down, avoiding grain clogging the screen holes.

[0025] The drive mechanism 500 can drive the screen shaft 222 to rotate 90°, so that the screen 221 can be flipped to clean the material. There is no need to manually disassemble the screen for cleaning, thus avoiding residual grains from affecting the next test. In this embodiment, the drive mechanism 500 includes a bracket 510 disposed outside the screening box 210. An electric push rod 520 is mounted on the bracket 510, and a drive handle 530 is located at the end of the screen shaft 222. The telescopic end of the electric push rod 520 is connected to the drive handle 530 to drive the screen shaft 222 to rotate. Alternatively, the drive mechanism 500 can be replaced by a stepper motor.

[0026] Preferably, the connecting mechanism 300 includes several sets of spring guide rods 310, each spring guide rod 310 is provided with a limiting plate 320, the outer side of the screening box 210 is provided with an ear plate 211 for the spring guide rods 310 to pass through, a spring 330 is provided between the limiting plate 320 and the ear plate 211, the spring 330 is fitted on the spring guide rod 310, and the upper end of the spring guide rod 310 is provided with an external thread that mates with a nut.

[0027] Spring 330 can absorb more than 80% of the vibration energy generated by vibration motor 230, preventing vibration from being transmitted to support base 100 and weighing mechanism 400, and reducing vibration interference error of weighing sensor 440.

[0028] A weighing mechanism 400 is located at the outlet below the screening box 210. The weighing mechanism 400 includes a weighing box 410, which is mounted on a weighing sensor 440. The weighing sensor 440 is mounted on a support base 100. The weighing mechanism 400 does not contact the screening mechanism 200 or the support base 100; it is supported by the weighing sensor 440. The weighing sensor 440 is electrically connected to the controller 900. The controller 900 is a PLC controller (model S7-1200) equipped with a 7-inch touchscreen, a data storage capacity of 100,000 records, and an RS485 communication interface. The controller 900 is connected to the grinding mill control system.

[0029] The weighing box 410 is provided with a metering valve plate 420 at its outlet end. The metering valve plate 420 is provided with valve plate shafts 430 at both ends. The valve plate shafts 430 are rotatably mounted on the side wall of the weighing box 410. The valve plate shafts 430 are driven by the drive mechanism 500. The outlet end of the weighing box 410 is located at the discharge port 111 of the support base 100. The weighing box 410 does not contact the screening box 210 or the support base 100.

[0030] In this embodiment, the drive mechanism 500 has the same structure as the screen rotating shaft 222. The metering valve plate 420 can be driven by an electric push rod to rotate 90°, achieving rapid unloading without manual tilting, resulting in a high degree of automation; the valve plate is tightly sealed when closed. The weighing box 410 has no contact with other components, avoiding vibration transmission and mechanical interference.

[0031] Preferably, the weighing box 410 includes two weighing chambers 411, and a guide protrusion 412 is provided between the two weighing chambers 411. The guide protrusion 412 is provided with two sets of guide slopes. The weighing sensor 440 is provided at the bottom of the guide protrusion 412. The support base 100 is provided with two discharge ports 111 corresponding to the two weighing chambers 411.

[0032] The inclined surface of the guide protrusion 412 can accurately guide the screened grain into the two weighing bins 411, avoiding material accumulation in the bins. The weighing sensor 440 is set in the lower space of the guide protrusion 412 to improve the installation stability of the weighing bins 410.

[0033] A spiral sampler 600 is installed at the feed inlet at the upper end of the screening box 210. The feed end of the spiral sampler 600 is located in the discharge hopper of the upper-level grinding mill, and the outlet of the spiral sampler 600 is located above the feed inlet at the upper end of the screening box 210.

[0034] In this embodiment, two sets of spiral samplers 600 are provided. The two spiral samplers 600 take samples from the discharge ports of the two sets of grinding rollers of the upper-level grinding mill. The spiral sampler 600 has a screw pitch of 50mm, a rotation speed of 60rpm, a single sample amount of 100g, and a sampling time of 20 seconds.

[0035] Two sets of spiral samplers sample the two sets of grinding rollers separately, allowing for individual acquisition of the breakage rate data for each set of rollers. This provides a precise basis for adjusting the independent spacing between the two sets of rollers. The spiral samplers convey grain at a uniform speed through spiral blades, and the sampling volume is controllable, completing a single sampling within 30 seconds. Compared to manual sampling, this improves efficiency. Simultaneously, starting the spiral sampler at 600°C is sufficient to achieve sampling, providing an equipment foundation for automated testing.

[0036] In this embodiment, two sampling screw conveyors take samples from the discharge ports of two sets of grinding rollers, and the obtained particle content data are used as the basis for adjusting the gap between the two sets of grinding rollers. The two sampling screw conveyors of this equipment take samples sequentially for sieving and measurement, and the principle of the two processes is completely the same.

[0037] A dust cover 700 is installed at the feed inlet at the upper end of the screening box 210 to prevent dust from falling from the spiral sampler. The dust cover 700 can completely cover the sampling and material falling area, and the dust diffusion amount is ≤0.5mg / m³, which meets the workshop dust emission standards. At the same time, it prevents dust from entering the screening box 210 and affecting the screening accuracy.

[0038] The implementation process for this equipment is as follows: Set the single sampling amount to 100g, vibration time to 2 minutes, and screen flipping interval to 5 seconds via the touch screen of controller 900; confirm that the feed end of spiral sampler 600 has been inserted into the discharge hopper of the two sets of grinding rollers of the grinding mill, dust cover 700 is installed in place, and receiving tray 800 is placed below the guide chamber 130; the metering valve plate 420 of weighing box 410 is in the closed state.

[0039] The first set of spiral samplers 600 is started. The spiral blades uniformly convey the wheat in the grinding roller hopper to the upper screen 221 of the screening box 210. The sampler stops after 20 seconds. At the same time, the vibrating motor 230 is started, and the screening box 210 begins to vibrate and screen. Then the weighing process is carried out, as follows: 1) Fine powder weighing: After vibration for 2 minutes, the fine powder (≤4mm) falls through two layers of screens into the weighing chamber 411 of the weighing box 410. The weighing sensor 440 records the weight m1 of the fine powder (e.g., 20g) and transmits the data to the controller 900.

[0040] 2) Weighing of medium-sized particles: 5 seconds after the vibration stops, the drive mechanism 500 drives the lower screen shaft 222 to rotate 45°, and the medium-sized particles (4-8mm) on the lower screen fall into the weighing chamber 411. The weighing sensor records the total weight m2 (e.g., 60g), and the controller calculates the weight of the medium-sized particles = m2 - m1 = 40g.

[0041] 3) Weighing of coarse particles: After another 5 seconds, the drive mechanism drives the upper screen shaft to rotate 45°, and the coarse particles (≥8mm) on the upper screen fall into the weighing chamber. The weighing sensor records the total weight m3 (e.g., 100g), and the controller calculates the weight of coarse particles = m3 - m2 = 40g.

[0042] The controller automatically calculates the breakage rate: fine powder percentage A1 = (m1 / m3) × 100% = (20 / 100) × 100% = 20%, medium particle percentage A2 = ((m2-m1) / m3) × 100% = 40 / 100 × 100% = 40%, and coarse particle percentage A3 = ((m3-m2) / m3) × 100% = 40 / 100 × 100% = 40%. The data is displayed on the touch screen. The gap between the grinding rollers of the upstream grinding mill is adjusted based on the calculated breakage rate.

[0043] After weighing is completed, the drive mechanism drives the metering valve plate 420 to rotate 90°, and the wheat in the weighing bin 411 falls into the receiving tray 800 through the discharge port 111 and the guide chamber 130, completing the unloading; the metering valve plate closes, the upper and lower screens are reset to the horizontal state respectively, and the wheat in the receiving tray 800 can be recycled to the koji production line; the equipment waits for the next inspection instruction.

[0044] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The embodiments and features described in this application can be arbitrarily combined without conflict. The protection scope of this utility model should be defined as the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A grain breakage screening and detection device, characterized in that, The system includes a support base (100), a screening mechanism (200) mounted on the support base (100) via a connecting mechanism (300), a screening box (210) with a vibration motor (230) on the outside of the screening box (210), at least one screen mechanism (220) inside the screening box (210), a screen (221) including a screen (221), a screen (222) with screen shafts (222) at both ends of the screen (221), the screen shafts (222) being rotatably mounted on the side wall of the screening box (210), the screen shafts (222) being driven by a drive mechanism (500), a weighing mechanism (400) at the lower outlet of the screening box (210), the weighing mechanism (400) including a weighing box (410) mounted on a weighing sensor (440), and the weighing sensor (440) being mounted on the support base. On (100), the load cell (440) is electrically connected to the controller (900). A metering valve plate (420) is provided at the outlet end of the weighing box (410). Valve plate shafts (430) are provided at both ends of the metering valve plate (420). The valve plate shafts (430) are rotatably mounted on the side wall of the weighing box (410). The valve plate shafts (430) are driven by the drive mechanism (500). The outlet end of the weighing box (410) is provided on the support. The material outlet (111) of the support base (100), the weighing box (410), the screening box (210), and the support base (100) are not in contact; a spiral sampler (600) is installed at the feed inlet at the upper end of the screening box (210), the feed end of the spiral sampler (600) is located in the discharge hopper of the upper mill, and the outlet of the spiral sampler (600) is located above the feed inlet at the upper end of the screening box (210).

2. The grain breakage screening and detection equipment according to claim 1, characterized in that, The drive mechanism (500) includes a bracket (510), which is located outside the screening box (210) or weighing box (410). An electric push rod (520) is provided on the bracket (510). A drive handle (530) is provided at the end of the screen shaft (222) or valve plate shaft (430). The telescopic end of the electric push rod (520) is connected to the drive handle (530) to drive the screen shaft (222) or valve plate shaft (430) to rotate.

3. The grain breakage screening and detection equipment according to claim 1, characterized in that, The connecting mechanism (300) includes several sets of spring guide rods (310), with a limiting plate (320) on the spring guide rod (310). The outer side of the screening box (210) is provided with an ear plate (211) through which the spring guide rod (310) passes. A spring (330) is provided between the limiting plate (320) and the ear plate (211). The spring (330) is fitted on the spring guide rod (310), and the upper end of the spring guide rod (310) is provided with an external thread that mates with a nut.

4. The grain breakage screening and detection equipment according to claim 1, characterized in that, The spiral sampler (600) is set in two sets, and the two spiral samplers (600) take samples from the discharge ports of the two sets of grinding rollers of the upper grinding mill respectively.

5. The grain breakage screening and detection equipment according to claim 4, characterized in that, A dust cover (700) is provided at the feed inlet at the upper end of the screening box (210) to prevent dust from falling from the spiral sampler.

6. The grain breakage screening and detection equipment according to claim 1, characterized in that, The weighing box (410) includes two weighing chambers (411), and a guide protrusion (412) is provided between the two weighing chambers (411). The guide protrusion (412) is provided with two sets of guide slopes. The weighing sensor (440) is located at the bottom of the guide protrusion (412). The support base (100) is provided with two discharge ports (111) corresponding to the two weighing chambers (411).

7. The grain breakage screening and detection equipment according to claim 1, characterized in that, The bottom of the support base (100) is provided with a guide cavity (130) corresponding to the material drop port (111).

8. The grain breakage screening and detection equipment according to claim 7, characterized in that, A receiving tray (800) is provided below the material guiding cavity (130).

9. A grain breakage screening and detection device according to claim 7, characterized in that, The support base (100) includes a base (110) and a plurality of support columns (120) disposed at the bottom of the base (110), and the material discharge port (111) is disposed on the base (110).

10. A grain breakage screening and detection device according to claim 7, characterized in that, The screen mechanism (220) includes two sets, arranged one above the other. The aperture of the screen (221) of the upper screen mechanism (220) is larger than that of the screen (221) of the lower screen mechanism (220).

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