阅读说明：本技术 一种浮力法谷物水分快速测定方法及其测定仪 (Method and instrument for quickly measuring grain moisture by buoyancy method ) 是由 程蛟 崔相如 汪建明 金用 于 2019-10-08 设计创作，主要内容包括：本发明属于谷物水分测定技术领域,具体的说是一种浮力法谷物水分快速测定方法及其测定仪；包括刻度尺、量筒、电子天平、气泵、谷物烘干机、水箱、一号密封盖、二号密封盖、测距仪、谷物、通气道、一号网和二号网；水箱包括左箱体和右箱体,通气道连通左箱体和右箱体,并且通气道的中央与气泵连接；左箱体的上端设置有一号箱口,一号箱口与一号密封盖通过螺纹连接；右箱体的上端设置有二号箱口,测距仪分别固连在左箱体内部的上端面和右箱体内部的上端面；本发明主要用于测量玉米颗粒的水分含量,通过测量烘干后的谷物吸水后的液面距测距仪的高度,测量未烘干的等量的谷物吸水后液面距测距仪的高度,来间接推算谷物的水分含量。(The invention belongs to the technical field of grain moisture determination, and particularly relates to a method for rapidly determining grain moisture by a buoyancy method and a determinator thereof; the device comprises a graduated scale, a measuring cylinder, an electronic balance, an air pump, a grain dryer, a water tank, a first sealing cover, a second sealing cover, a distance measuring instrument, grains, an air passage, a first net and a second net; the water tank comprises a left tank body and a right tank body, the air channel is communicated with the left tank body and the right tank body, and the center of the air channel is connected with the air pump; the upper end of the left box body is provided with a first box opening, and the first box opening is connected with a first sealing cover through threads; the upper end of the right box body is provided with a second box opening, and the distance measuring instrument is fixedly connected to the upper end face of the inside of the left box body and the upper end face of the inside of the right box body respectively; the method is mainly used for measuring the moisture content of the corn grains, and indirectly calculates the moisture content of the corn by measuring the height between the liquid level of the dried corn after absorbing water and the distance meter and measuring the height between the liquid level of the non-dried corn with the same amount after absorbing water.)

1. A buoyancy method grain moisture rapid determinator comprises a graduated scale, a measuring cylinder, an electronic balance, an air pump and a grain (5) dryer, wherein the graduated scale is used for measuring length; the measuring cylinder is used for measuring the volume of water; the electronic balance is used for weighing the mass of the grains (5); the air pump is used for pressurizing; the grain (5) dryer is used for drying grains (5); the method is characterized in that: comprises a water tank (1), a first sealing cover (2), a second sealing cover (3), a distance measuring instrument (4), grains (5), an air duct (11), a first net (6) and a second net (7); the water tank (1) comprises a left tank body (12) and a right tank body (13), and the left tank body (12) and the right tank body (13) are symmetrical about the central plane of the water tank (1); the air channel (11) is arranged at the upper part of the middle of the water tank (1), the air channel (11) is communicated with the left tank body (12) and the right tank body (13), and the center of the air channel (11) is connected with the air pump; a first box opening (14) is formed in the upper end of the left box body (12), a first trapezoidal thread (15) is formed in the inner side of the first box opening (14), and a rubber layer (18) is arranged on the surface of the first trapezoidal thread (15); the first box opening (14) is connected with the first sealing cover (2) through threads; a second box opening (16) is formed in the upper end of the right box body (13), a second trapezoidal thread (17) is formed in the inner side of the second box opening (16), and a rubber layer (18) is arranged on the surface of the second trapezoidal thread (17); the second box opening (16) is connected with the second sealing cover (3) through threads; a first net (6) is arranged inside the left box body (12), grains (5) are arranged in the first net (6), meshes of the first net (6) are smaller than grains (5), the right end of the first net (6) is fixedly connected with the right end of a first box opening (14), and the left end of the first net (6) is fixedly connected with the left end of a first sealing cover (2); a second net (7) is arranged inside the right box body (13), the second net (7) is filled with grains (5) which are equal to the first net (6), the left end of the second net (7) is fixedly connected with the left side of a second box opening (16), the right end of the second net (7) is fixedly connected with the right end of a second sealing cover (3), and meshes of the second net (7) are smaller than grains (5); the distance measuring instruments (4) are fixedly connected to the upper end face inside the left box body (12) and the upper end face inside the right box body (13) respectively, and the two distance measuring instruments (4) are the same in height.

2. The grain moisture rapid measuring instrument by the buoyancy method according to claim 1, characterized in that: the inner side of the first sealing cover (2) is made of hard rubber materials, and the outer side of the first sealing cover (2) is made of soft rubber materials; the outside of a sealed lid (2) is provided with No. three trapezoidal thread (21), No. three trapezoidal thread (21) are constituteed by trapezoidal arch (22) that a piece is interrupted, the rear side of trapezoidal arch (22) is provided with a hole (23), the lower extreme intercommunication of a hole (23) and a sealed lid (2), the number in a hole (23) is six at least, and a hole (23) is along sealed lid (2) circumference evenly distributed.

3. The grain moisture rapid measuring instrument by the buoyancy method according to claim 2, characterized in that: the left end of the first net (6) is wrapped with a soft rubber layer; the right end of the second net (7) is also wrapped with a soft rubber layer.

4. the grain moisture rapid measuring instrument by the buoyancy method according to claim 3, characterized in that: a first air cavity is arranged inside the first net (6), a first opening is formed in the lower portion of the first net (6) of the first air cavity, and air in the first air cavity can be led out from the first opening; no. two air cavities are arranged inside the No. two nets (7), and No. two openings are formed in the lower portions of the No. two nets (7) of the No. two air cavities, so that air in the No. two air cavities can be led out from the No. two openings.

5. The grain moisture rapid measuring instrument by the buoyancy method according to claim 4, characterized in that: the inner walls of the left box body (12) and the right box body (13) are coated with super-hydrophobic paint, so that the inner walls of the left box body (12) and the right box body (13) are not easy to be wetted; the first net (6) and the second net (7) are coated with super-hydrophobic coating, so that the first net (6) and the second net (7) are not easy to be stained with water.

6. a method for rapid determination of grain moisture by buoyancy method according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:

S1: the corn is taken as corn particles, the corn particles are evenly divided into a first pile and a second pile through an electronic balance, the mass of the first pile and the mass of the second pile are both m, the corn particles in the first pile are placed into a corn dryer to be dried at the set temperature of 105 ℃, and the corn particles in the second pile are not dried until the weight of the corn particles in the first pile is not reduced any more.

S2: the method comprises the following steps of measuring the same amount of water through a measuring cylinder, respectively pouring the same amount of water into a left box body and a right box body, simultaneously putting a dried first pile of corn particles into a first net and immersing the corn particles into water in the left box body, putting a second pile of non-dried corn particles into a second net and immersing the corn particles into water in the right box body, sealing a first box opening tightly by a first sealing cover in a rotating mode, sealing a second box opening tightly by a second sealing cover in a rotating mode, pressurizing the left box body and the right box body simultaneously through an air passage by an air pump, promoting the floating corn particles in the first pile and the second pile to sink, accelerating the corn particles in the first pile to absorb the water, accelerating the corn particles in the second pile to absorb the water, and simultaneously soaking the corn particles in the first pile and the second pile for thirty minutes.

S3: after the corn particles in the first pile and the corn particles in the second pile are soaked for thirty minutes, the first sealing cover and the second sealing cover are opened simultaneously, the first sealing cover drives the left end of the first net to take the corn particles in the first pile out of the water surface, the second sealing cover drives the right end of the second net to take the corn particles in the second pile out of the water surface, and the corn particles are kept still for thirty minutes.

S4: taking the corn particles in the first pile and the corn particles in the second pile out of the water surface, standing for thirty minutes, and measuring the distance between the liquid level of the left box body and the laser range finder to be h by the laser range finder₁And measuring the distance h between the liquid level of the right box body and the laser range finder₂The length and width of the inner cavity of the left box body are respectively a and b when the graduated scale is used for measuring, and the length and width of the inner cavity of the right box body are respectively a and b because the left box body and the right box body are symmetrical about the central symmetrical plane of the water tank, so that the moisture content of the corn is obtained: water content (%) > 10³×ab(h₂-h₁)÷m×100％。

Technical Field

The invention belongs to the technical field of grain moisture determination, and particularly relates to a method and a device for rapidly determining grain moisture by a buoyancy method.

Background

The moisture content is an important quality index of the grain, directly influences various links of grain acquisition, sale, allocation and transportation, storage, processing and the like, and has great significance for grain departments in measuring the moisture of the grain. How to measure grain moisture quickly, accurately and conveniently is a worldwide problem, and currently, many countries such as the united states, japan, france, england, sweden and the like are actively discussed, and although there are many methods, there are many defects, such as: although the national standard method (drying method) in China has high detection precision, the method is time-consuming, high in energy consumption and low in efficiency, and rapid online detection cannot be realized; although the capacitance method has the advantages of simple structure, low cost and high speed, the capacitance method has a plurality of interference factors, low measurement precision and poor stability; the resistance method has high requirements on samples, has narrow water measuring range and is not suitable for measuring high-moisture grains; although the infrared heating method is fast in measurement, dry matter loss is easily caused, the measurement precision is low, and although the near infrared method is fast in analysis speed, the variety, size, density, environment temperature, vibration and the like of a sample influence the measurement result, so that the stability is poor, and the application range is small; such as microwave and radio methods, nuclear magnetic resonance methods, neutron methods, acoustic methods, etc., have not been widely used because of their high requirements for corresponding conditions and high costs. At present, the water content detection technology is not perfect in China, the on-line water content detection of links such as domestic grain purchasing, drying and the like still stays at the level of sensory inspection and judgment by experience, and the measurement result is neither scientific nor reliable.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention provides a method for rapidly measuring the moisture of grains by a buoyancy method and a measuring instrument thereof. The invention is used for measuring the moisture content of corn particles, and indirectly calculates the moisture content of the corn by measuring the height between the liquid level of the dried corn after absorbing water and the distance meter and measuring the height between the liquid level of the non-dried corn with the same amount after absorbing water.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a buoyancy method grain moisture rapid tester, which comprises a graduated scale, a measuring cylinder, an electronic balance, an air pump and a grain dryer, wherein the graduated scale is used for measuring length; the measuring cylinder is used for measuring the volume of water; the electronic balance is used for weighing the mass of the grains; the air pump is used for pressurizing; the grain dryer is used for drying grains; comprises a water tank, a first sealing cover, a second sealing cover, a distance measuring instrument, grains, an air duct, a first net and a second net; the water tank comprises a left tank body and a right tank body, and the left tank body and the right tank body are symmetrical about a central plane of the water tank; the air passage is arranged at the upper part of the middle of the water tank, the air passage is communicated with the left tank body and the right tank body, and the center of the air passage is connected with the air pump; a first box opening is formed in the upper end of the left box body, a first trapezoidal thread is formed in the inner side of the first box opening, and a rubber layer is arranged on the surface of the first trapezoidal thread; the first box opening is connected with the first sealing cover through threads; a second box opening is formed in the upper end of the right box body, a second trapezoidal thread is formed in the inner side of the second box opening, and a rubber layer is arranged on the surface of the second trapezoidal thread; the second box opening is connected with the second sealing cover through threads; a first net is arranged inside the left box body, grains are filled in the first net, meshes of the first net are smaller than grains, the right end of the first net is fixedly connected with the right end of a first box opening, and the left end of the first net is fixedly connected with the left end of a first sealing cover; a second net is arranged inside the right box body, the second net is filled with grains which are equal to the first net in quantity, the left end of the second net is fixedly connected with the left side of the opening of the second box body, the right end of the second net is fixedly connected with the right end of the second sealing cover, and meshes of the second net are smaller than grains; the distance measuring instruments are fixedly connected to the upper end face of the inside of the left box body and the upper end face of the inside of the right box body respectively, and the two distance measuring instruments are the same in height; during operation, the cereal of getting is corn particles, with corn particles through the even equant divide into pile and pile No. two of electronic balance, pile No. one and pile the quality and be m No. two, put into the corn drying-machine with the corn particles of pile and dry, the corn particles of pile No. two need not dry, get equivalent moisture through graduated flask volume and pour into left box respectively after thatAnd a right box body, wherein the dried corn particles in the first pile are simultaneously placed into the first net and are immersed into the water in the left box body, the corn particles in the second pile which are not dried are placed into the second net and are immersed into the water in the right box body, the first sealing cover is used for tightly sealing the first box opening in a rotating mode, the second sealing cover is used for tightly sealing the second box opening in a rotating mode, an air pump is used for simultaneously pressurizing the inside of the left box body and the inside of the right box body through an air passage to promote the floating corn particles in the first pile and the second pile to sink, the absorption of moisture by the corn particles in the first pile can be accelerated, the absorption of moisture by the corn particles in the second pile is accelerated, after the corn particles in the first pile and the corn particles in the second pile are simultaneously soaked for thirty minutes, the first sealing cover and the second sealing cover are simultaneously opened, meanwhile, the first sealing cover drives the left end of the first net to bring the corn particles in the first pile out of the first net, and the second sealing cover drives, taking the second heap of corn particles out of the water surface, standing for thirty minutes, and measuring the distance between the liquid level of the left box body and the laser range finder by the laser range finder to be h₁And measuring the distance h between the liquid level of the right box body and the laser range finder₂The length and width of the inner cavity of the left box body are respectively a and b when the graduated scale is used for measuring, and the length and width of the inner cavity of the right box body are respectively a and b because the left box body and the right box body are symmetrical about the central symmetrical plane of the water tank, so that the moisture content of the corn is obtained: water content (%) > 10³×ab(h₂-h₁) Div m × 100%; the rubber layer is arranged on the surface of the first trapezoidal thread, so that the connection between the first box opening and the first sealing cover is tighter, and the air tightness is better; the rubber layer is arranged on the surface of the second trapezoidal thread, so that the connection between the second box opening and the second sealing cover is tighter, and the air tightness is better.

The inner side of the first sealing cover is made of a hard rubber material, and the outer side of the first sealing cover is made of a soft rubber material; the outer side of the first sealing cover is provided with a third trapezoidal thread, the third trapezoidal thread is composed of a piece of discontinuous trapezoidal protrusion, a first hole is formed in the rear side of the trapezoidal protrusion and communicated with the lower end of the first sealing cover, the number of the first holes is at least six, and the first holes are uniformly distributed along the circumferential direction of the first sealing cover; the during operation, when a hole is pressurized when letting in gas, because the outside material of a sealed lid is soft rubber materials, the inside material of a sealed lid is hard rubber materials, the outside deformation that makes a sealed lid is greater than a sealed lid inboard, No. three trapezoidal threads comprise the trapezoidal arch that a piece is interrupted, thereby make No. three trapezoidal threads can outwards expand and enlarge, thereby make the outside of a sealed lid outwards push up trapezoidal arch tighter, thereby make sealed lid tighter with being connected of a case mouth, No. two sealed lids are the same with a sealed lid, do not do this and describe repeatedly.

The left end of the first net is wrapped with a soft rubber layer; the right end of the second net is also wrapped with a soft rubber layer; when the sealing device works, the left end of the first net is wrapped with the soft rubber layer, the soft rubber layer is easy to deform when being extruded, so that the air tightness of the first sealing cover and the first box opening is reduced less when the left end of the first net is clamped by the first sealing cover and the first box opening, and the friction force between the soft rubber layer and the first sealing cover is large and is not easy to fall off; the right end of the second net is also wrapped with a soft rubber layer, and the condition of the second net is similar to that of the first net, and is not described herein again.

The first air cavity is arranged inside the first net, a first opening is formed in the lower portion of the first net, and air in the first air cavity can be led out from the first opening; a second air cavity is arranged in the second net, a second opening is formed in the lower part of the second net, and air in the second air cavity can be led out from the second opening; when the left end of the first net is extruded by the first sealing cover and the first opening, air at the upper end of the first air cavity is extruded into the lower end of the first air cavity, and air in the first air cavity is extruded out of the first opening, so that the air pressure in the left box body is increased, and the corn particles in the first pile in the left box body are promoted to absorb moisture more quickly; no. two air cavities are arranged in the No. two nets, No. two openings are formed in the lower portions of the No. two nets, the condition of the No. two air cavities is the same as that of the No. one net, and the description is omitted here.

the inner walls of the left box body and the right box body are coated with super-hydrophobic paint, so that the inner walls of the left box body and the right box body are not easy to be wetted; the first net and the second net are also coated with super-hydrophobic coating, so that the first net and the second net are not easy to be wetted; during operation, the inner wall of left box and the inner wall of right box scribble super hydrophobic coating, the inner wall that makes the inner wall of left box and the inner wall of right box are not stained with water, also scribble super hydrophobic coating on a net and No. two nets, can make and be difficult for being stained with water on a net and No. two nets, make and mention the thirty minutes back of stewing with the maize granule, water that is stained with on the inner wall of left side box and water that is stained with on a net more flow into the liquid of left box in, water that is stained with on the inner wall of right box and water that is stained with on a net more flow into the liquid of right box in, reduce the error of the total volume of left box after the standing and the internal water of back box, thereby make the moisture content of maize granule measurationally more.

A method for quickly measuring the moisture of grains by a buoyancy method comprises the following steps:

S1: the corn is taken as corn particles, the corn particles are evenly divided into a first pile and a second pile through an electronic balance, the mass of the first pile and the mass of the second pile are both m, the corn particles in the first pile are placed into a corn dryer to be dried at the set temperature of 105 ℃, and the corn particles in the second pile are not dried until the weight of the corn particles in the first pile is not reduced any more.

S2: the method comprises the following steps of measuring the same amount of water through a measuring cylinder, respectively pouring the same amount of water into a left box body and a right box body, simultaneously putting a dried first pile of corn particles into a first net and immersing the corn particles into water in the left box body, putting a second pile of non-dried corn particles into a second net and immersing the corn particles into water in the right box body, sealing a first box opening tightly by a first sealing cover in a rotating mode, sealing a second box opening tightly by a second sealing cover in a rotating mode, pressurizing the left box body and the right box body simultaneously through an air passage by an air pump, promoting the floating corn particles in the first pile and the second pile to sink, accelerating the corn particles in the first pile to absorb the water, accelerating the corn particles in the second pile to absorb the water, and simultaneously soaking the corn particles in the first pile and the second pile for thirty minutes.

s3: after the corn particles in the first pile and the corn particles in the second pile are soaked for thirty minutes, the first sealing cover and the second sealing cover are opened simultaneously, the first sealing cover drives the left end of the first net to take the corn particles in the first pile out of the water surface, the second sealing cover drives the right end of the second net to take the corn particles in the second pile out of the water surface, and the corn particles are kept still for thirty minutes.

S4: taking the corn particles in the first pile and the corn particles in the second pile out of the water surface, standing for thirty minutes, and measuring the distance between the liquid level of the left box body and the laser range finder to be h by the laser range finder₁And measuring the distance h between the liquid level of the right box body and the laser range finder₂The length and width of the inner cavity of the left box body are respectively a and b when the graduated scale is used for measuring, and the length and width of the inner cavity of the right box body are respectively a and b because the left box body and the right box body are symmetrical about the central symmetrical plane of the water tank, so that the moisture content of the corn is obtained: water content (%) > 10³×ab(h₂-h₁)÷m×100％。

The invention has the following beneficial effects:

1. The device is used for measuring the moisture content of corn particles, and the rubber layer is arranged on the surface of the first trapezoidal thread, so that the connection between the first box opening and the first sealing cover is tighter, and the air tightness is better; the rubber layer is arranged on the surface of the second trapezoidal thread, so that the connection between the second box opening and the second sealing cover is tighter, and the air tightness is better.

2. The invention adopts the outer side material of the first sealing cover as the soft rubber material and the inner side material of the first sealing cover as the hard rubber material, so that the outer side deformation of the first sealing cover is larger than the inner side of the first sealing cover, the third trapezoidal thread consists of a block of discontinuous trapezoidal bulges, the third trapezoidal thread can expand and expand outwards, the trapezoidal bulges are pushed outwards more tightly by the outer side of the first sealing cover, and the connection between the first sealing cover and the first box opening is more tight,

3. According to the invention, the soft rubber layer is wrapped at the left end of the first net, and the soft rubber layer is easy to deform when being extruded, so that the air tightness of the first sealing cover and the first box opening is reduced less when the left end of the first net is clamped by the first sealing cover and the first box opening, and the friction force between the soft rubber layer and the first sealing cover is large, so that the first sealing cover is not easy to fall off.

Drawings

FIG. 1 is a half sectional view of the present invention;

FIG. 2 is a full sectional view of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a flow chart of a method of the present invention;

In the figure: the air-conditioning box comprises a water tank 1, an air duct 11, a left box body 12, a right box body 13, a first box opening 14, a first trapezoidal thread 15, a second box opening 16, a second trapezoidal thread 17, a rubber layer 18, a first sealing cover 2, a third trapezoidal thread 21, a trapezoidal protrusion 22, a first hole 23, a second sealing cover 3, a distance meter 4, grains 5, a first net 6 and a second net 7.

Detailed Description

a method for quickly measuring grain moisture by a buoyancy method and a measuring instrument therefor according to an embodiment of the present invention will be described below with reference to fig. 1 to 4, and the front, rear, left, and right directions according to the present invention are all based on fig. 2.

As shown in fig. 1-4, the grain moisture rapid measuring instrument by the buoyancy method comprises a graduated scale, a measuring cylinder, an electronic balance, an air pump and a grain 5 dryer, wherein the graduated scale is used for measuring the length; the measuring cylinder is used for measuring the volume of water; the electronic balance is used for weighing the mass of the grains 5; the air pump is used for pressurizing; the grain 5 dryer is used for drying grain 5; comprises a water tank 1, a first sealing cover 2, a second sealing cover 3, a distance measuring instrument 4, grains 5, an air duct 11, a first net 6 and a second net 7; the water tank 1 comprises a left tank body 12 and a right tank body 13, and the left tank body 12 and the right tank body 13 are symmetrical about a central plane of the water tank 1; the air duct 11 is arranged at the upper part of the middle of the water tank 1, the air duct 11 is communicated with the left tank body 12 and the right tank body 13, and the center of the air duct 11 is connected with the air pump; a first box opening 14 is formed in the upper end of the left box body 12, a first trapezoidal thread 15 is formed in the inner side of the first box opening 14, and a rubber layer 18 is arranged on the surface of the first trapezoidal thread 15; the first box opening 14 is connected with the first sealing cover 2 through threads; a second box opening 16 is formed in the upper end of the right box body 13, a second trapezoidal thread 17 is formed in the inner side of the second box opening 16, and a rubber layer 18 is arranged on the surface of the second trapezoidal thread 17; the second box opening 16 is connected with the second sealing cover 3 through threads; the left box body 12 is internally provided withA first net 6 is arranged, grains 5 are arranged in the first net 6, the meshes of the first net 6 are smaller than the grains 5, the right end of the first net 6 is fixedly connected with the right end of a first box opening 14, and the left end of the first net 6 is fixedly connected with the left end of a first sealing cover 2; a second net 7 is arranged inside the right box body 13, the second net 7 is filled with grains 5 which are equal to the first net 6, the left end of the second net 7 is fixedly connected with the left side of a second box opening 16, the right end of the second net 7 is fixedly connected with the right end of a second sealing cover 3, and meshes of the second net 7 are smaller than grains 5; the distance measuring instruments 4 are fixedly connected to the upper end face of the inside of the left box body 12 and the upper end face of the inside of the right box body 13 respectively, and the two distance measuring instruments 4 are the same in height; when the corn harvester works, the corn 5 is taken as corn particles, the corn particles are evenly divided into a first pile and a second pile by an electronic balance, the mass of the first pile and the second pile is m, the corn particles in the first pile are placed into a grain 5 dryer for drying, the corn particles in the second pile are not dried, then equal amount of water is measured by a measuring cylinder and respectively poured into a left box body 12 and a right box body 13, the dried corn particles in the first pile are placed into a first net 6 and soaked in the water of the left box body 12, the corn particles in the second pile which are not dried are placed into a second net 7 and soaked in the water of the right box body 13, a first sealing cover 2 is used for tightly sealing a first box opening 14, a second sealing cover 3 is used for tightly sealing a second box opening 16, and an air pump is used for simultaneously pressurizing the inside of the left box body 12 and the inside of the right box body 13 through an air duct 11 to promote the floating corn particles in the first pile and the second pile to sink, can accelerate the maize granule of a heap to absorb moisture, also accelerate the maize granule of No. two heaps to absorb moisture, the maize granule of a heap and the maize granule of No. two heaps soak thirty minutes back simultaneously, open sealed lid 2 and No. two sealed lids 3 simultaneously, and simultaneously, sealed lid 2 drives the left end of a net 6, take out the maize granule of a heap in a net 6 the surface of water, No. two sealed lids 3 drive the right-hand member of No. two nets 7, take out the maize granule of No. two heaps in No. two nets 7 the surface of water, after thirty minutes of stewing simultaneously, the distance of measuring left box 12 liquid levels and laser range finder 4 through laser range finder 4 is h₁and measuring the distance h between the liquid level of the right box 13 and the laser range finder 4₂the length and width of the inner cavity of the left box body 12 measured by the graduated scale are a and b respectively, because the left box body 12 and the graduated scale are arrangedthe right box body 13 is symmetrical about the central symmetrical plane of the water tank 1, so the length and width of the inner cavity of the right box body 13 are a and b respectively, and the moisture content of the corn is obtained: water content (%) > 10³×ab(h₂-h₁) Div m × 100%; the rubber layer 18 is arranged on the surface of the first trapezoidal thread 15, so that the first box opening 14 and the first sealing cover 2 are connected more tightly, and the air tightness is better; the rubber layer 18 is arranged on the surface of the second trapezoidal thread 17, so that the second box opening 16 and the second sealing cover 3 are connected more tightly, and the air tightness is better.

The inner side of the first sealing cover 2 is made of hard rubber materials, and the outer side of the first sealing cover 2 is made of soft rubber materials; the outer side of the first sealing cover 2 is provided with a third trapezoidal thread 21, the third trapezoidal thread 21 is composed of a piece of discontinuous trapezoidal protrusion 22, the rear side of the trapezoidal protrusion 22 is provided with a first hole 23, the first hole 23 is communicated with the lower end of the first sealing cover 2, the number of the first holes 23 is at least six, and the first holes 23 are uniformly distributed along the circumferential direction of the first sealing cover 2; during operation, when a hole 23 is when the pressurization lets in gas, because the outside material of a sealed lid 2 is soft rubber materials, the inside material of a sealed lid 2 is hard rubber materials, make the outside deformation of a sealed lid 2 be greater than a sealed lid 2 inboard, No. three trapezoidal thread 21 comprises the trapezoidal arch 22 that a piece is interrupted, thereby make No. three trapezoidal thread 21 can outwards expand and enlarge, thereby make the outside of a sealed lid 2 outwards push up trapezoidal arch 22 tighter, thereby make sealed lid 2 inseparabler with being connected of a case mouth 14, No. two sealed lids 3 are the same with a sealed lid 2, do not do this and give unnecessary detail.

The left end of the first net 6 is wrapped with a soft rubber layer; the right end of the second net 7 is also wrapped with a soft rubber layer; when the sealing device works, the left end of the first net 6 is wrapped with the soft rubber layer, the soft rubber layer is easy to deform when being extruded, so that when the left end of the first net 6 is clamped by the first sealing cover 2 and the first box opening 14, the air tightness of the first sealing cover 2 and the first box opening 14 is reduced less, and the friction force between the soft rubber layer and the first sealing cover 2 is large, so that the first sealing cover is not easy to fall off; the right end of the second net 7 is also wrapped with a soft rubber layer, and the condition of the second net 7 is similar to that of the first net 6, and is not described herein again.

A first air cavity is arranged inside the first net 6, a first opening is formed in the lower portion of the first net 6, and air in the first air cavity can be led out from the first opening; a second air cavity is arranged inside the second net 7, a second opening is formed in the lower portion of the second net 7, and air in the second air cavity can be led out from the second opening; when the left end of the first net 6 is extruded by the first sealing cover 2 and the first opening, the air at the upper end of the first air cavity is extruded into the lower end of the first air cavity, and the air in the first air cavity is extruded out of the first opening, so that the air pressure in the left box body 12 is increased, and the corn particles in the first pile in the left box body 12 are promoted to absorb moisture more quickly; no. two air cavities are arranged inside the No. two nets 7, No. two openings are formed in the lower portions of the No. two nets 7, the condition of the No. two air cavities is the same as that of the No. 6 net, and repeated description is omitted here.

The inner walls of the left box body 12 and the right box body 13 are coated with super-hydrophobic paint, so that the inner walls of the left box body 12 and the right box body 13 are not easy to be wetted; the first net 6 and the second net 7 are also coated with super-hydrophobic coating, so that the first net 6 and the second net 7 are not easy to be wetted; during operation, the inner wall of left box 12 and the inner wall of right box 13 scribble super hydrophobic coating, make the inner wall of left box 12 and the inner wall of right box 13 be not stained with water, also scribble super hydrophobic coating on net 6 and No. two nets 7, can make and be difficult for being stained with water on net 6 and No. two nets 7, make and mention the back of stewing thirty minutes with the maize granule, the more flow in the liquid of left box 12 of water that is stained with on the inner wall of left box 12 and net 6, the more flow in the liquid of right box 13 of water that is stained with on the inner wall of right box 13 and net 6, reduce the error of the total volume of left box 12 and the back box water-logging after the stewing, thereby make the moisture content of maize granule surveyed more accurately.

A method for quickly measuring the moisture of grains by a buoyancy method comprises the following steps:

S1: the corn is taken as corn particles, the corn particles are evenly divided into a first pile and a second pile through an electronic balance, the mass of the first pile and the mass of the second pile are both m, the corn particles in the first pile are placed into a corn dryer to be dried at the set temperature of 105 ℃, and the corn particles in the second pile are not dried until the weight of the corn particles in the first pile is not reduced any more.

S2: the method comprises the following steps of measuring the same amount of water through a measuring cylinder, respectively pouring the same amount of water into a left box body and a right box body, simultaneously putting a dried first pile of corn particles into a first net and immersing the corn particles into water in the left box body, putting a second pile of non-dried corn particles into a second net and immersing the corn particles into water in the right box body, sealing a first box opening tightly by a first sealing cover in a rotating mode, sealing a second box opening tightly by a second sealing cover in a rotating mode, pressurizing the left box body and the right box body simultaneously through an air passage by an air pump, promoting the floating corn particles in the first pile and the second pile to sink, accelerating the corn particles in the first pile to absorb the water, accelerating the corn particles in the second pile to absorb the water, and simultaneously soaking the corn particles in the first pile and the second pile for thirty minutes.

S3: after the corn particles in the first pile and the corn particles in the second pile are soaked for thirty minutes, the first sealing cover and the second sealing cover are opened simultaneously, the first sealing cover drives the left end of the first net to take the corn particles in the first pile out of the water surface, the second sealing cover drives the right end of the second net to take the corn particles in the second pile out of the water surface, and the corn particles are kept still for thirty minutes.

S4: taking the corn particles in the first pile and the corn particles in the second pile out of the water surface, standing for thirty minutes, and measuring the distance between the liquid level of the left box body and the laser range finder to be h by the laser range finder₁And measuring the distance h between the liquid level of the right box body and the laser range finder₂The length and width of the inner cavity of the left box body are respectively a and b when the graduated scale is used for measuring, and the length and width of the inner cavity of the right box body are respectively a and b because the left box body and the right box body are symmetrical about the central symmetrical plane of the water tank, so that the moisture content of the corn is obtained: water content (%) > 10³×ab(h₂-h₁)÷m×100％。

The specific working process is as follows:

When the corn harvester works, the corn 5 is corn particles, the corn particles are evenly divided into a first pile and a second pile through an electronic balance, the mass of the first pile and the mass of the second pile are both m, and the corn particles in the first pile are placed into the cornThe object 5 is dried by a dryer, the second pile of corn particles is not dried, then equal amount of water is measured by a measuring cylinder and respectively poured into a left box body 12 and a right box body 13, the dried first pile of corn particles is placed into a first net 6 and is immersed into the water of the left box body 12, the second pile of corn particles which are not dried is placed into a second net 7 and is immersed into the water of the right box body 13, a first box opening 14 is tightly sealed by a first sealing cover 2, a second box opening 16 is tightly sealed by a second sealing cover 3 in a rotating way, the air pump is used for simultaneously pressurizing the inside of the left box body 12 and the inside of the right box body 13 through an air duct 11, the floating corn particles of the first pile and the second pile are promoted to sink, the moisture absorption of the corn particles of the first pile can be accelerated, the moisture absorption of the corn particles of the second pile can be accelerated, the corn particles of the first pile and the corn particles of the second pile are simultaneously immersed for thirty minutes, simultaneously, a first sealing cover 2 and a second sealing cover 3 are opened, simultaneously, the first sealing cover 2 drives the left end of the first net 6 to take out the corn particles piled in the first net 6, the second sealing cover 3 drives the right end of the second net 7 to take out the corn particles piled in the second net 7, and after the two nets stand for thirty minutes, the distance between the liquid level of the left box 12 and the laser range finder 4 is measured by the laser range finder 4 to be h₁And measuring the distance h between the liquid level of the right box 13 and the laser range finder 4₂The length and width of the inner cavity of the left box body 12 measured by the graduated scale are respectively a and b, and because the left box body 12 and the right box body 13 are symmetrical about the central symmetrical plane of the water tank 1, the length and width of the inner cavity of the right box body 13 are respectively a and b, and the corn moisture content is obtained: water content (%) > 10³×ab(h₂-h₁) Div m × 100%; the rubber layer 18 is arranged on the surface of the first trapezoidal thread 15, so that the first box opening 14 and the first sealing cover 2 are connected more tightly, and the air tightness is better; the rubber layer 18 is arranged on the surface of the second trapezoidal thread 17, so that the second box opening 16 and the second sealing cover 3 are connected more tightly, and the air tightness is better; when the first hole 23 is pressurized and gas is introduced, because the outer side material of the first sealing cover 2 is soft rubber material and the inner side material of the first sealing cover 2 is hard rubber material, the outer side deformation of the first sealing cover 2 is larger than the inner side of the first sealing cover 2, and the third trapezoidal thread 21 consists of a block of discontinuous trapezoidal protrusions 22, so that the third trapezoidal thread is formedthe first trapezoidal thread 21 can expand outwards to enable the trapezoidal protrusion 22 to be pushed outwards more tightly outside the first sealing cover 2, so that the first sealing cover 2 is connected with the first box opening 14 more tightly, the second sealing cover 3 is the same as the first sealing cover 2, and further description is omitted; the left end of the first net 6 is wrapped with the soft rubber layer, the soft rubber layer is easy to deform when being extruded, so that when the left end of the first net 6 is clamped by the first sealing cover 2 and the first box opening 14, the air tightness of the first sealing cover 2 and the first box opening 14 is reduced less, and the friction force between the soft rubber layer and the first sealing cover 2 is large and is not easy to fall off; the right end of the second net 7 is also wrapped with a soft rubber layer, and the condition of the second net 7 is similar to that of the first net 6, and is not described herein; when the left end of the first net 6 is extruded by the first sealing cover 2 and the first opening, the gas at the upper end of the first air cavity is extruded into the lower end of the first air cavity, and the gas in the first air cavity is extruded out from the first opening, so that the air pressure in the left box body 12 is increased, and the corn particles in the first pile in the left box body 12 are promoted to absorb moisture more quickly; a second air cavity is arranged inside the second net 7, a second opening is formed in the lower portion of the second net 7, and the condition of the second air cavity is the same as that of the first net 6, and is not described herein; the inner wall of left box 12 and the inner wall of right box 13 scribble super hydrophobic coating, make the inner wall of left box 12 and the inner wall of right box 13 be not stained with water, also scribble super hydrophobic coating on net 6 and No. two nets 7, can make and be difficult for being stained with water on net 6 and No. two nets 7, make and mention the maize granule and stew thirty minutes after stewing, in the more liquid of left box 12 of inflow of water that is stained with on the inner wall of left box 12 and net 6, in the more liquid of right box 13 of inflow of water that is stained with on the inner wall of right box 13 and net 6, reduce the error of the total volume of left box 12 and the interior water of back box behind the stewing, thereby make the moisture content of maize granule surveyed more accurately.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.