Seed moisture detection device

Abstract

The utility model belongs to the technical field of seed moisture detection, and particularly relates to a seed moisture detection device which comprises a machine table, a weighing chamber with an opening in the upper surface is fixed to the upper surface of the machine table, and a weighing sensor, a drying mechanism and two extrusion rollers are sequentially arranged in the weighing chamber from bottom to top. The lower end of the weighing sensor is fixedly connected to the middle of the lower wall of the weighing chamber, the drying mechanism is fixed to the inner side of the weighing chamber, the two ends of the two extrusion rollers horizontally extend out of the weighing chamber, a gear box is fixed to one side of the weighing chamber, one ends of the two extrusion rollers penetrate through one side of the gear box, and a micro motor is fixed to the other side of the gear box. The micro motor is in transmission connection with the two extrusion rollers through a gearbox, and a tray is installed at the upper end of the weighing sensor through threads. According to the seed moisture weighing device, obvious shaking can not be generated while seeds are broken, the shaking effect borne by the weighing sensor is greatly reduced, and the accuracy of seed moisture weighing is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of seed moisture detection, and particularly relates to a seed moisture detection device. Background Art

[0002] The quality of crop seeds is crucial to subsequent crop yield and quality. Testing and controlling various seed indicators helps control seed quality from the source. Seed moisture testing typically involves placing a 4.5-5g sample in a sample box and weighing the gross weight. The seed is then preheated and dried to remove most of the moisture. The net weight is then measured. The difference between the gross and net weights represents the moisture content.

[0003] The seed moisture meter on the market combines sample weighing and drying at the same time, thus reducing the steps of moving the sample.

[0004] When a sample is placed in a seed moisture meter, a micro motor is generally used to rotate the crushing blade to crush the sample to increase the heating area. The rapid rotation of the crushing blade will produce a large centrifugal effect, causing the entire seed moisture meter to shake, causing the weighing sensor to be disturbed by the shaking, reducing the accuracy of the internal weighing sensor. For this reason, we propose a seed moisture detection device. Utility Model Content

[0005] The purpose of the utility model is to provide a seed moisture detection device, which can break the seeds without producing obvious shaking, greatly reducing the shaking effect on the weighing sensor, and improving the accuracy of seed moisture weighing.

[0006] The technical solutions adopted by this utility model are as follows:

[0007] A seed moisture detection device comprises a machine platform, a weighing chamber with an upper surface opening is fixed on the upper surface of the machine platform, a weighing sensor, a drying mechanism and two squeezing rollers are sequentially arranged inside the weighing chamber from bottom to top, the lower end of the weighing sensor is fixedly connected to the middle of the lower wall of the weighing chamber, the drying mechanism is fixed inside the weighing chamber, the two ends of the two squeezing rollers extend horizontally out of the weighing chamber respectively, a gear box is fixed on one side of the weighing chamber, one end of the two squeezing rollers passes through one side of the gear box, a micro motor is fixed on the other side of the gear box, the micro motor is connected to the two squeezing rollers through the gear box, and when detecting, the micro motor is first started to drive the gear box. The wheel box drives the two squeezing rollers to rotate in opposite directions, and then the sample box is opened to pour the sample into the weighing chamber. The two squeezing rollers are used to flatten and spread the sample at a low speed. By applying a squeezing effect close to static force to the seeds, the seeds can be broken without producing obvious shaking. The sample falls onto the weighing sensor and the gross weight M1 is weighed first. Then the drying mechanism is started to evaporate the moisture of the sample at a high temperature of 100-110°C within a specified time period. At this time, the net weight M2 of the sample is weighed, and the moisture content of the sample is △M=M1-M2, and the moisture content is △H=△M / M1, which greatly reduces the shaking effect on the weighing sensor and improves the accuracy of seed moisture weighing.

[0008] A tray is threadedly mounted on the upper end of the weighing sensor. The lower part of the tray is an internally threaded tube structure, and the upper part of the tray is a disc structure. The tray can support the sample while providing heat insulation, reducing the heat transferred from the sample to the weighing sensor and preventing the weighing sensor from overheating.

[0009] A sealing plug is inserted into the upper opening of the weighing chamber, and the upper edge of the sealing plug extends outward. When testing the sample, the sealing plug can be used to seal the upper opening of the weighing chamber to block hot steam. At other times, the upper opening of the weighing chamber can also be sealed to block moisture in the air.

[0010] The drying mechanism includes a partition fixedly connected to the inner side of the weighing chamber. The partition is in the shape of a square plate with a circular hole in the middle. The circular hole of the partition is sleeved on the outside of the internal threaded tube. The outer edge of the partition is folded upward and a heating tube is fixed at the folded position. The heating tube surrounds the upper edge of the disc structure. The partition is suspended below the tray, and a small distance is maintained between the two to block the air circulation between the sample and the weighing sensor as much as possible, further reducing the possibility of the weighing sensor being heated, and the heating tube is used to energize and heat the sample, so that the sample evaporates water and dries quickly.

[0011] An exhaust pipe is fixedly connected to the back of the weighing chamber, and the exhaust pipe port can be connected to an indoor exhaust fan. After the drying mechanism is started, water evaporated from the sample forms water vapor, which is discharged to the outside along the exhaust pipe.

[0012] A sampling door is hinged on the front of the weighing chamber. After the weighing chamber cools down, the sampling door can be opened to expose the sample, and the sample can be taken out from the door opening. The tray can be cleaned with alcohol to keep the tray clean.

[0013] The technical effects achieved by this utility model are:

[0014] The utility model discloses a seed moisture detection device. During detection, a micro motor is first started to drive a gear box to drive two squeezing rollers to rotate in opposite directions, and then a sample box is opened to pour the sample into a weighing chamber. The two squeezing rollers are used to flatten and spread the sample at a low speed. By applying a squeezing effect close to static force to the seeds, the seeds can be broken without generating obvious shaking. The sample falls onto a weighing sensor and a gross weight M1 is first weighed. Then a drying mechanism is started to evaporate the moisture of the sample at a high temperature of 100 to 110° C. within a specified time period. At this time, a net weight M2 of the sample is weighed. The moisture content of the sample is △M=M1-M2, and the moisture content is △H=△M / M1. This greatly reduces the shaking effect on the weighing sensor, thereby improving the accuracy of seed moisture weighing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of a seed moisture detection device of the utility model;

[0016] Figure 2 This is a cross-sectional view of a seed moisture detection device of the present invention;

[0017] Figure 3 This is a front view of the drying mechanism of the present utility model;

[0018] Figure 4 This is a front view of the weighing sensor of the utility model;

[0019] Figure 5 It is a front view of the squeezing roller of the present utility model.

[0020] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0021] 1. Machine; 2. Weighing chamber; 3. Weighing sensor; 4. Squeeze roller; 5. Gearbox; 6. Micro motor; 7. Tray; 8. Sealing plug; 9. Heating tube; 10. Partition; 11. Exhaust pipe; 12. Sampling door. DETAILED DESCRIPTION

[0022] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.

[0023] like Figure 1-5As shown, a seed moisture detection device includes a machine platform 1, a touch screen is embedded in the machine platform 1, a development board is installed inside the machine platform 1, a weighing chamber 2 with an open upper surface is fixed on the upper surface of the machine platform 1, and a weighing sensor 3, a drying mechanism and two squeezing rollers 4 are arranged in sequence from bottom to top inside the weighing chamber 2, the lower end of the weighing sensor 3 is fixedly connected to the middle of the lower wall of the weighing chamber 2, the drying mechanism is fixed inside the weighing chamber 2, and the two ends of the two squeezing rollers 4 extend horizontally out of the weighing chamber 2 respectively, a gear box 5 is fixed on one side of the weighing chamber 2, one side of the gear box 5 is penetrated by one end of the two squeezing rollers 4, three gears meshing in sequence can be installed inside the gear box 5, and a micro motor 6 is fixed on the other side of the gear box 5;

[0024] The load cell 3 can be a micro load cell of the XFC205R model, with a detection range of 0-2N and an accuracy of 0-0.45lbf. The micro motor 6 and the drying mechanism are both connected to the development board. The micro motor 6 can be a medical micro motor of the ZWBMD022022-4 model with an operating voltage of 24VDC. The micro motor 6 is connected to the two squeezing rollers 4 through the gear box 5. The interior of the weighing chamber 2 is kept dry and clean.

[0025] Before testing, a 4.5-5g sample is selected and placed in a sample box for sealed transfer. During testing, the micromotor 6 is first started to drive the gearbox 5 to drive the two squeezing rollers 4 to rotate in opposite directions, and then the sample box is opened to pour the sample into the weighing chamber 2. The two squeezing rollers 4 are used to flatten and spread the sample at a low speed. By applying a squeezing effect close to static force to the seeds, the seeds can be broken without producing obvious shaking. The sample falls onto the weighing sensor 3 and the gross weight M1 is first weighed. Then the drying mechanism is started to evaporate the moisture of the sample at a high temperature of 100-110°C within a specified time period. At this time, the net weight M2 of the sample is weighed, and the moisture content of the sample is △M=M1-M2, and the moisture content is △H=△M / M1, which greatly reduces the shaking effect on the weighing sensor 3, thereby improving the accuracy of seed moisture weighing.

[0026] like Figure 1 、 Figure 2 and Figure 5 As shown, the gear ratio of each gear inside the gear box 5 can be set, so that after the micro motor 6 is started, it rotates at a high speed through each gear to drive the two squeezing rollers 4 to rotate at a lower speed, preventing the two squeezing rollers 4 from generating a large centrifugal effect and preventing the occurrence of violent shaking.

[0027] like Figure 2 、 Figure 3 and Figure 4As shown, a tray 7 is threadedly mounted on the upper end of the weighing sensor 3. The tray 7 can be made of rock wool. The lower part of the tray 7 is an internally threaded tube structure, and the upper part of the tray 7 is a disc structure. The tray 7 can support the sample and insulate at the same time, reducing the heat transferred from the sample to the weighing sensor 3 and preventing the weighing sensor 3 from overheating.

[0028] like Figure 1 and Figure 2 As shown, a sealing plug 8 is inserted into the upper opening of the weighing chamber 2, and the upper edge of the sealing plug 8 extends outward. The sealing plug 8 can be made of fluororubber. When testing the sample, the sealing plug 8 can be used to seal the upper opening of the weighing chamber 2 to block hot steam. At other times, the upper opening of the weighing chamber 2 can also be sealed to block moisture in the air.

[0029] like Figure 2 、 Figure 3 and Figure 4 As shown, the drying mechanism includes a partition 10 fixedly connected to the inner side of the weighing chamber 2. The partition 10 can be made of rock wool. The partition 10 is in the shape of a square plate with a circular hole in the middle. The circular hole of the partition 10 is sleeved on the outside of the internal threaded tube. The outer edge of the partition 10 is folded upward and a heating tube 9 is fixed to the folded position. The heating tube 9 surrounds the upper edge of the disc structure. The partition 10 is suspended below the tray 7, and a small distance is maintained between the two to block the air circulation between the sample and the weighing sensor 3 as much as possible, further reducing the possibility of the weighing sensor 3 being heated, and using the heating tube 9 to energize and heat the sample, so that the sample evaporates water by heat and dries quickly.

[0030] like Figure 1 and Figure 2 As shown, an exhaust pipe 11 is fixed to the back of the weighing chamber 2. The exhaust pipe 11 can be connected to the indoor exhaust fan. After the drying mechanism is started, the water evaporated from the sample forms water vapor, which is discharged to the outside along the exhaust pipe 11.

[0031] like Figure 1 and Figure 2 As shown, a sampling door 12 is hinged on the front of the weighing chamber 2. After the weighing chamber 2 cools down, the sampling door 12 can be opened to expose the sample, and the sample can be taken out from the door opening. The tray 7 can be cleaned with alcohol to keep the tray 7 clean.

[0032] The working principle of the present invention is as follows: during detection, the micro motor 6 is first started to drive the gear box 5 to drive the two squeezing rollers 4 to rotate in opposite directions, and then the sample box is opened to pour the sample into the weighing chamber 2. The two squeezing rollers 4 are used to flatten and spread the sample at a low speed. By applying a squeezing effect close to static force to the seeds, the seeds can be broken without producing obvious shaking. The sample falls onto the weighing sensor 3 and the gross weight M1 is first weighed. Then the micro motor 6 is stopped and the drying mechanism is started. The moisture of the sample is evaporated at a high temperature of 100-110°C within a specified time period. Then the drying mechanism is stopped and the net weight M2 of the sample is weighed. The moisture content of the sample is △M=M1-M2, and the moisture content is △H=△M / M1. This greatly reduces the shaking effect on the weighing sensor 3, thereby improving the accuracy of seed moisture weighing.

[0033] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. A seed moisture detection device, comprising a machine (1), characterized in that: A weighing chamber (2) with an opening on the upper surface is fixed on the upper surface of the machine (1). A weighing sensor (3), a drying mechanism and two squeezing rollers (4) are sequentially arranged inside the weighing chamber (2) from bottom to top. The lower end of the weighing sensor (3) is fixedly connected to the middle of the lower wall of the weighing chamber (2). The drying mechanism is fixed inside the weighing chamber (2). The two ends of the two squeezing rollers (4) extend horizontally out of the weighing chamber (2). A gear box (5) is fixed on one side of the weighing chamber (2). One end of the two squeezing rollers (4) penetrates one side of the gear box (5). A micro motor (6) is fixed on the other side of the gear box (5). The micro motor (6) is connected to the two squeezing rollers (4) through the gear box (5).

2. A seed moisture detection device according to claim 1, characterized in that: A tray (7) is threadedly mounted on the upper end of the weighing sensor (3); the lower portion of the tray (7) is an internally threaded tube structure, and the upper portion of the tray (7) is a disc structure.

3. A seed moisture detection device according to claim 1, characterized in that: A sealing plug (8) is inserted into the upper opening of the weighing chamber (2), and the upper edge of the sealing plug (8) extends outward.

4. A seed moisture detection device according to claim 2, characterized in that: The drying mechanism comprises a partition (10) fixedly connected to the inner side of the weighing chamber (2), the partition (10) being in the shape of a square plate with a circular hole in the middle, the circular hole of the partition (10) being sleeved on the outside of the internal threaded tube, the outer edge of the partition (10) being folded upward and a heating tube (9) being fixed at the folded portion, the heating tube (9) surrounding the upper edge of the disc structure.

5. The seed moisture detection device according to claim 1, characterized in that: The back side of the weighing chamber (2) is connected to and fixed with an exhaust pipe (11).

6. The seed moisture detection device according to claim 1, characterized in that: The front of the weighing chamber (2) is hinged with a sampling door (12).

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