阅读说明：本技术 谷物水分检测装置、粮食烘干设备及温度控制方法 (Grain moisture detection device, grain drying equipment and temperature control method ) 是由 胡彪 徐燕 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种谷物水分检测装置、粮食烘干设备及温度控制方法。所述谷物水分检测装置包括水分检测组件、谷物供给组件以及壳体,水分检测组件以及谷物供给组件至少部分地位于壳体内部,谷物供给组件包括筛板及料斗；筛板开设有谷粒保持口,谷粒保持口用于容纳并保持单粒谷物；料斗的内表面开设有入料口以及出料口；筛板可拆卸地安装于料斗的内表面上且可相对于料斗的内表面旋转,谷粒保持口能够通过旋转筛板与入料口相连通,料斗的内表面还在谷粒保持口的旋转路径上安装有弹性元件。采用本发明所公开的谷物水分检测装置,被卡着的谷物能够较容易地脱离该谷粒保持口,从而降低颗粒过大的谷物被卡在筛板的故障发生几率。(The invention discloses a grain moisture detection device, grain drying equipment and a temperature control method. The grain moisture detection device comprises a moisture detection assembly, a grain supply assembly and a shell, wherein the moisture detection assembly and the grain supply assembly are at least partially positioned in the shell, and the grain supply assembly comprises a sieve plate and a hopper; the sieve plate is provided with a grain holding opening for accommodating and holding single grains; the inner surface of the hopper is provided with a feeding port and a discharging port; the sieve plate is detachably mounted on the inner surface of the hopper and can rotate relative to the inner surface of the hopper, the grain holding port can be communicated with the feeding port through the rotating sieve plate, and an elastic element is further mounted on the inner surface of the hopper on a rotating path of the grain holding port. By adopting the grain moisture detection device disclosed by the invention, the clamped grains can be easily separated from the grain holding opening, so that the fault occurrence probability that grains with overlarge grains are clamped on the sieve plate is reduced.)

1. Cereal moisture detection device, cereal moisture detection device include the casing, be used for detecting the moisture detection subassembly of the moisture content of the cereal grain that awaits measuring and be used for to moisture detection subassembly supplies the cereal supply assembly of the cereal grain that awaits measuring, moisture detection subassembly and cereal supply assembly at least partially is located inside the casing, its characterized in that, cereal supply assembly includes:

the grain retaining opening is formed in the sieve plate and used for accommodating and retaining single grains;

the inner surface of the hopper is provided with a feeding port and a discharging port;

the sieve plate is detachably mounted on the inner surface of the hopper and can rotate relative to the inner surface of the hopper, the grain holding port can be communicated with the feeding port by rotating the sieve plate, and an elastic element is further mounted on the inner surface of the hopper on the rotating path of the grain holding port.

2. The grain moisture detection device of claim 1, wherein a push block is fixedly attached to the sieve plate, the grain supply assembly configured to: under the condition that the sieve plate rotates positively, grains to be detected can be transferred to the feeding port along with the rotation of the sieve plate; under the condition of sieve reversal, the cereal grain that awaits measuring can by the propelling movement piece propelling movement extremely the discharge gate.

3. The grain moisture detecting apparatus according to claim 2, wherein the mounting position of the elastic member is located in an adjoining region of the inlet port, and the adjoining region is located forward of a rotation path in a case where the sieve plate is rotated in the normal rotation or reverse rotation with respect to the inlet port.

4. The grain moisture detecting device according to claim 1, wherein the sieve plate is further provided with an exhaust hole, and an opening area of the exhaust hole on an upper surface of the sieve plate is smaller than an opening area of the exhaust hole on a lower surface of the sieve plate.

5. The cereal moisture detection device of claim 1, characterized in that moisture determine module includes the subassembly that rolls that comprises a pair of rolling wheel, cereal moisture determine device still is provided with slide subassembly, slide subassembly is located the below of pan feeding mouth, slide subassembly is used for providing the cereal grain that awaits measuring by the pan feeding mouth extremely roll the guide path of subassembly, slide subassembly is provided with guide structure, guide structure is used for guiding the cereal grain that awaits measuring to move to roll the middle zone in the subassembly thickness direction.

6. The cereal moisture detection device of claim 1, wherein the moisture detection assembly comprises a rolling assembly comprising a first rolling wheel and a second rolling wheel, and at least one of the first rolling wheel and the second rolling wheel is provided with a notch for rolling the circumferential surface of the grain to be detected.

7. The grain moisture detecting apparatus according to claim 6, wherein the cross-sectional profile of the first rolling wheel or the second rolling wheel is a closed figure consisting of a major arc and a straight line.

8. The cereal moisture detection device of claim 6 or 7, wherein the moisture detection assembly comprises a rolling assembly consisting of a first rolling wheel and a second rolling wheel, the first rolling wheel and the second rolling wheel are used for rolling the grain to be detected, groove-shaped grains are formed on the circumferential surface of the grain to be detected, and the grains of the first rolling wheel are different from the grains of the second rolling wheel.

9. Grain drying apparatus, characterized in that it has a grain moisture detection device according to any one of claims 1 to 8.

10. The grain drying apparatus of claim 9, further comprising a rotary valve set, a temperature control device, and a control device, wherein an input of the control device is electrically connected to the grain moisture detection device, and an output of the control device is electrically connected to the rotary valve set and the temperature control device, respectively.

11. The temperature control method applicable to the grain drying apparatus according to claim 10, wherein the temperature control method comprises:

the control device receives the moisture value measured by the grain moisture detection device;

the control device compares the magnitude relation between the measured moisture value and a preset threshold value, and if the measured moisture value is larger than the preset threshold value, the control device at least executes one of the following steps: controlling the temperature adjusting device to increase the temperature of the grain drying equipment; and controlling the rotating speed of a driving motor for driving the rotary valve group to be reduced.

Technical Field

The invention relates to the technical field of moisture detection, in particular to a grain moisture detection device, grain drying equipment and a temperature control method.

Background

At present, grain drying equipment is generally provided with a grain moisture detection device for measuring moisture contained in grains, so that related working parameters of the grain drying equipment can be adjusted in time.

The moisture content value measured by the known resistance-type moisture detection device under the condition of grinding single grains is relatively accurate, so that how to ensure that only the single grains are ground as far as possible is one of the problems to be solved in the field of resistance-type moisture detection devices. There has been a resistance type moisture detecting apparatus for detecting moisture contained in grains, which is provided with a disk-shaped sieve plate having a grain holding port formed to accommodate only a single grain of a certain kind of grains at a feed port, and which is rotated to open or block communication between the grain holding port and a chamber of a hopper.

However, if a grain that falls into the grain-holding opening has a particle size that is too large to get stuck in the grain-holding opening. Even if the grain holding port and the chamber of the hopper are communicated with each other, the grain holding port cannot enter the chamber, and the grain moisture detection device fails, so that the problem needs to be solved.

Disclosure of Invention

The invention mainly aims to provide a grain moisture detection device, grain drying equipment and a temperature control method, so as to reduce the probability of the fault that grains with overlarge particles are clamped on a sieve plate.

According to a first aspect of embodiments of the present invention, a cereal moisture detection device comprises a housing, a moisture detection assembly for detecting a moisture content of a grain to be tested, and a cereal supply assembly for supplying the grain to be tested to the moisture detection assembly, the moisture detection assembly and the cereal supply assembly being located at least partially inside the housing, the cereal supply assembly comprising:

the grain retaining opening is formed in the sieve plate and used for accommodating and retaining single grains;

the inner surface of the hopper is provided with a feeding port and a discharging port;

the sieve plate is detachably mounted on the inner surface of the hopper and can rotate relative to the inner surface of the hopper, the grain holding port can be communicated with the feeding port by rotating the sieve plate, and an elastic element is further mounted on the inner surface of the hopper on the rotating path of the grain holding port.

Further, fixedly connected with propelling movement piece on the sieve, the cereal supply assembly is set up as: under the condition that the sieve plate rotates positively, grains to be detected can be transferred to the feeding port along with the rotation of the sieve plate; under the condition of sieve reversal, the cereal grain that awaits measuring can by the propelling movement piece propelling movement extremely the discharge gate.

Further, the installation position of the elastic element is located in an adjacent area of the feeding port, and the adjacent area is located in front of a rotation path of the sieve plate under the condition of forward rotation or reverse rotation relative to the feeding port.

Furthermore, the sieve plate is also provided with exhaust holes, and the opening area of the exhaust holes on the upper surface of the sieve plate is smaller than that on the lower surface of the sieve plate.

Further, moisture determine module includes the subassembly that rolls that constitutes by a pair of rolling wheel, cereal moisture detection device still is provided with the slide subassembly, the slide subassembly is located the below of pan feeding mouth, the slide subassembly be used for providing the cereal grain that awaits measuring by the pan feeding mouth extremely roll the guide route of subassembly, the slide subassembly is provided with guide structure, guide structure is used for guiding the cereal grain that awaits measuring to move extremely roll the ascending middle zone of subassembly thickness side.

Further, moisture determine module includes the rolling subassembly of constituteing by first rolling wheel and second rolling wheel, first rolling wheel and at least one of them is seted up jaggedly in the second rolling wheel is used for rolling the circumference surface of the cereal that awaits measuring.

Further, the cross-sectional profile of the first rolling wheel or the second rolling wheel is a closed figure consisting of a major arc and a straight line segment.

Further, moisture detection subassembly includes the subassembly that rolls that comprises first rolling wheel and second rolling wheel, first rolling wheel and the second rolling wheel is used for rolling all sets up the line of slot shape on the circumferential surface of the grain that awaits measuring, the line of first rolling wheel is different from the line of second rolling wheel.

According to a second aspect of the embodiment of the invention, the grain drying equipment is provided with the grain moisture detection device according to any one of the above technical schemes.

Further, the grain drying equipment is also provided with a rotary valve bank, a temperature regulating device and a control device, wherein the input end of the control device is electrically connected with the grain moisture detection device, and the output end of the control device is respectively electrically connected with the rotary valve bank and the temperature regulating device.

According to a second aspect of the embodiment of the invention, the grain drying equipment is provided with the grain moisture detection device according to any one of the above technical schemes.

Further, the grain drying equipment is also provided with a rotary valve bank, a temperature regulating device and a control device, wherein the input end of the control device is electrically connected with the grain moisture detection device, and the output end of the control device is respectively electrically connected with the rotary valve bank and the temperature regulating device.

According to a third aspect of the embodiments of the present invention, a temperature control method applicable to the aforementioned grain drying apparatus includes:

the control device receives the moisture value measured by the grain moisture detection device;

the control device compares the magnitude relation between the measured moisture value and a preset threshold value, and if the measured moisture value is larger than the preset threshold value, the control device at least executes one of the following steps: controlling the temperature adjusting device to increase the temperature of the grain drying equipment; and controlling the rotating speed of a driving motor for driving the rotary valve group to be reduced.

The technical scheme provided by the embodiment of the invention at least has the following beneficial effects: the inner surface of the hopper is provided with an elastic element on the rotating path of the grain holding opening, and grains clamped at the grain holding opening touch the elastic element along with the rotation of the sieve plate. Under the effect of the elastic restoring force of the elastic element, the clamped grains can be easily separated from the grain holding opening, so that the probability of the fault that grains with overlarge particles are clamped on the sieve plate is reduced.

Drawings

FIG. 1 is a schematic view (perspective view) of the main structure of a grain moisture detecting apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view (side view) of the main structure of a grain moisture detecting apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an assembly structure of a hopper and a sieve plate in the grain moisture detecting device according to an embodiment of the present invention;

fig. 4 is a schematic view of another view of fig. 3 (view direction perpendicular to the screen panel);

fig. 5 is a schematic view of the structure of fig. 3 with the screen panel removed;

FIG. 6 is a schematic structural view of a sieve plate in the grain moisture detecting apparatus according to the embodiment of the present invention;

figure 7 is a cross-sectional view in the direction a-a of the vent holes in the screen panel of figure 6;

FIG. 8 is a schematic view showing the structure of a sieve plate in a grain moisture detecting apparatus according to another embodiment of the present invention;

FIG. 9 is a schematic view of a moisture measuring device in the grain moisture detecting apparatus according to the embodiment of the present invention;

FIG. 10 is a schematic view showing the construction of a driving unit in the grain moisture detecting apparatus according to the embodiment of the present invention;

fig. 11 is another view of fig. 10.

In the figure, 10-grain moisture detection device; 110-hopper, 111-feeding inlet, 112-first discharge outlet, 113-second discharge outlet and 114-intercepting plate; 120-sieve plate, 121-grain holding port, 122-exhaust hole, 123-pushing block; 131-a first rolling wheel, 132-a second rolling wheel, 133-a first scraper, 134-a second scraper, 135-a first brush, 136-a second brush; 140-a slide assembly; 160-a housing; 170-a resilient element; 180-moisture measuring element, 181-touch pad; 191-a driving motor, 192-a driving gear, 193-a driven gear, 194-a first rolling gear, 195-a second rolling gear, 196-a valley-entering gear and 197-a brush gear; 20-grains to be tested.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. The technical solutions between the embodiments of the present invention may be combined with each other, but should be based on the realization of those skilled in the art.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", and "left", "right", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, and may be, for example, a fixed connection and a movable connection, a detachable connection and a non-detachable connection, or an integral connection; may be mechanically or electrically connected or may be in communication with each other. And "fixedly connected" includes detachably connected, non-detachably connected, integrally connected, and the like.

The use of terms like "first" or "second" in this disclosure are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance or implicit to the technical feature indicated.

The embodiment of the invention relates to grain drying equipment. The grain drying equipment is provided with a storage device, a drying device and a circulating lifting device. The drying device is positioned below the storage device and is used for drying grain; the circulating lifting device is used for lifting the grain to the storage device positioned at the upper part of the grain drying equipment.

This grain drying equipment still has cereal moisture detection device 10, and this cereal moisture detection device 10 is located circulation hoisting device's the below of unloading the millet passageway for detect the moisture content from the cereal of unloading the millet passageway.

The grain drying equipment is also provided with a rotary valve group, a temperature regulating device and a control device, wherein the input end of the control device is electrically connected with the grain moisture detection device 10, and the output end of the control device is electrically connected with the rotary valve group and the temperature regulating device respectively. The grain moisture detection device 10 is matched with a control device of grain drying equipment to control the opening of a valve of a thermostat or the rotating speed of a motor of a rotary valve group, and the temperature of a heating furnace serving as a heat source is not required to be controlled. One heating furnace can provide heat for a plurality of grain drying devices, and the temperature of each grain drying device can be adjusted according to needs, so that the moisture content of grains in each grain drying device can be independently controlled.

The embodiment of the invention also provides a temperature control method. The temperature control method comprises the following steps:

the control device receives the moisture value measured by the grain moisture detection device 10;

the control device compares the magnitude relation between the measured moisture value and a preset threshold value, and if the measured moisture value is larger than the preset threshold value, the control device at least executes one of the following steps: controlling a temperature adjusting device to increase the temperature of the grain drying equipment; and controlling the rotating speed of a driving motor for driving the rotary valve group to be reduced. The lower the rotating speed of a driving motor of the rotary valve group is, the more time the grains are dried by hot air is, and the drying effect is improved. Two measures for improving the drying effect may be taken when one measure is difficult to improve the drying effect or the improvement effect is limited, and the other measure may be taken. As double insurance, the possibility that the grain drying effect of the grain drying equipment does not reach the standard is reduced.

The following text will describe the grain moisture detection device in the embodiment of the present invention with reference to the drawings.

Referring to fig. 1 and 2, the grain moisture detecting device 10 is generally divided into a housing 160, a moisture detecting component for detecting the moisture content of the grain 20 to be detected, and a grain supplying component for supplying the grain 20 to be detected to the moisture detecting component, wherein the moisture detecting component and the grain supplying component are at least partially located inside the housing 160.

Specifically, the grain supply assembly includes a hopper 110, a sieve plate 120 (not shown in fig. 1 and 2, see fig. 3-4 and 6-8), a chute assembly 140, and a transmission assembly, and the moisture detection assembly includes a crushing assembly and a moisture measuring element 180. The hopper 110, the screen 120, the crushing assembly, the chute assembly 140, the moisture measuring element 180, and the transmission assembly are all located at least partially inside the housing 160.

Referring to fig. 3 to 5, a feeding port 111 and a discharging port are formed on an inner surface of the hopper 110. The inlet 111 provides access for grains 20 to be tested to the channel space defined by the chute assembly 140 (see fig. 2), and the outlet is used to discharge grains that do not require moisture detection from the whole grain moisture detection device 10. It is understood that the number of ports may be at least two. As shown in fig. 5, the discharge ports include a first discharge port 112 and a second discharge port 113. The first outlet 112 is used for discharging grains which do not need to be detected, and the second outlet 113 is used for cleaning shriveled grains or sundry chips and the like. The hopper 110 also has a closure plate 114, and the inner surface of the hopper 110, around which the closure plate 114 is formed as most of the side of the open space, constitutes the bottom surface of the open space. It should be noted that the closure plate 114 does not completely enclose the open space around (e.g., the closure plate 114 is absent at the location of the first outlet 112). The closure plate 114 may be made of plastic or metal.

Referring to fig. 3 to 4 and 6, the sieve plate 120 is provided with a grain holding opening 121, and the grain holding opening 121 is used for accommodating and holding single grains. As described above, the moisture content value measured by the resistance type moisture detecting apparatus is relatively accurate in the case of crushing a single grain, and the grain holding opening 121 is used to allow only a single grain to pass through the sieve plate 120 and enter between a pair of crushing rollers of the crushing assembly as much as possible. The screen deck 120 is removably mounted to the inner surface of the hopper 110.

Referring to fig. 3 and 5, when the grain moisture detecting device 10 is installed, the inner surface of the hopper 110 is inclined to the horizontal plane, and thus the sieve plate 120 is also inclined to the horizontal plane. After the installation, second discharge gate 113 and first discharge gate 112 all are located pan feeding mouth 111's oblique below, therefore the cereal grain of discharging need not to detect and clear up flat cereal or miscellaneous bits etc. all can be with the help of cereal or miscellaneous bits self action of gravity to be convenient for collect and discharge.

The shape and size of the grain holding opening 121 can be specifically designed for each crop grain. When the variety of the grain to be tested needs to be changed (for example, the moisture content of the wheat grains is changed to the moisture content of the soybeans), the special sieve plate 120 is replaced. It is understood that the screen panel 120 may also be provided with a plurality of grain holding openings 121, each grain holding opening 121 being designed for a particular type of grain to be tested and thus being different in size or shape from one another.

As shown in fig. 3 to 4 and 6, the grain holding opening 121 is in the form of a notch in the edge of the sieve plate 120. It will be appreciated that the grain retention openings 121 may also be in the form of through holes in the screening deck 120, i.e. when the grain retention openings 121 are located in a non-edge region of the screening deck 120.

In the case where a plurality of grains 20 to be tested are required to sequentially enter the channel formed by the chute assembly 140, the sieve plate 120 may be provided with a plurality of grain holding openings 121 having the same shape and size, as shown in fig. 8.

The sieve plate 120 is rotatable relative to the inner surface of the hopper 110, and the grain holding port 121 is capable of communicating with the feed port 111 through the rotating sieve plate 120. Rotating the sieve plate 120 can make the grain holding opening 121 rotate to the position just facing the material inlet 111, so that the grains 20 to be measured in the grain holding opening 121 can fall into the channel in the slide assembly 140 through the material inlet 111.

Referring to fig. 5, the inner surface of the hopper 110 is further provided with an elastic member 170 along the rotation path of the grain holding hole 121. The grain clamped at the grain holding opening touches the elastic element along with the rotation of the sieve plate. Under the effect of the elastic restoring force of the elastic element, the clamped grains can be easily separated from the grain holding opening, so that the probability of the fault that grains with overlarge particles are clamped on the sieve plate is reduced.

Further, as shown in fig. 5, the mounting position of the elastic member 170 is located in an adjacent area of the feed port 111, and the adjacent area is located in front of the rotation path in the case of normal rotation or reverse rotation of the sieve plate 120 with respect to the feed port 111.

The elastic member 170 is located in front of the rotation path in the case of the normal rotation, so that the grain on the grain holding opening 121 of the sieve plate 120 is rotated to press against the elastic member 170, thereby applying a pressing force to the elastic member 170. The installation position of the elastic element 170 is located in front of the adjoining area of the material inlet 111, so that grains passing through the material inlet 111 are easily separated from the grain holding opening 121 and fall onto the surface of the sieve plate 120, and then are discharged through the second discharge opening 113 or the first discharge opening 112.

In the event that the screen 120 is inverted (which may not be necessary to detect moisture contained in the grain), the grain holding opening 121 will carry the grain, which may also be carried into the channel of the chute assembly 140. In order to avoid that grain enters the area of the relevant detection element also in case of no detection need, an elastic element 170 may be provided in front of the rotation path in case of inversion. The elastic member 170 may be rubber or a spring, etc. Specifically, the elastic member 170 may be a rubber strip exposed to the inner surface of the hopper 110 so that grains caught in the grain holding opening can more easily touch the rubber strip.

Referring to fig. 3 to 4 and fig. 6 and 8, a pushing block 123 is fixedly connected to the sieve plate 120, and the grain supply assembly is configured to: in the case of forward rotation (e.g., counterclockwise rotation) of the sieve plate 120, the grains 20 to be tested can be transferred to the feeding port 111 along with the rotation of the sieve plate 120; in the case where the sieve plate 120 is reversed (e.g., rotated clockwise), the grain 20 to be tested can be pushed to the first discharge hole 112 by the pushing block 123. As shown in fig. 6 and 8, the pushing block 123 is a conical block, and the cross-sectional profile of the conical block is a closed figure formed by a chord and a pair of right-angled sides, wherein the side where the right-angled sides are located is a right-angled side. The right-angled side is used for pushing the grains 20 to be measured to the first discharging hole 112.

Referring to fig. 6 to 8, the sieve plate 120 is further provided with an exhaust hole 122, and an opening area of the exhaust hole 122 on the upper surface of the sieve plate 120 is smaller than an opening area on the lower surface of the sieve plate 120. The function of the air outlet hole 122 is not limited to smooth air flow between the grain moisture detecting device 10 and the grain drying apparatus as much as possible, and also helps to reduce accumulation of dust or trash in the grain moisture detecting device 10, so that the air outlet hole 122 is designed as a tapered hole with an enlarged lower end opening, and a cross-sectional profile of the hole in a-a direction is a trapezoid with a longer bottom side than a top side, as shown in fig. 7. The design is such that the dust or sundries (the particles of the dust or sundries are smaller than the taper hole) can be easily and smoothly discharged out of the whole grain moisture detecting device 10 through the second discharging hole 113. It is understood that the exhaust holes 122 may be plural and may be provided to be uniformly arranged on the surface of the screen plate 120. The cross-sectional opening shape of the discharge hole 122 may be provided in a drop shape.

Referring to fig. 2, the moisture detecting assembly includes a rolling assembly composed of a pair of rolling wheels, the grain moisture detecting apparatus further includes a chute assembly 140, the chute assembly 140 is located below the feeding port 111, and the chute assembly 140 is used for providing a guiding path for the grains 20 to be detected from the feeding port 111 to the rolling assembly. The chute assembly 140 includes a chute shield that encloses a plurality of chute shields to form a channel that is closed on the sides and around. The channel can be divided into a first channel section and a second channel section, and the extending direction of the first channel section is approximately parallel to the axial direction of the chamber surrounded by the cut-off plate 114, so that the grains 20 to be measured from the first discharge hole 112 can smoothly fall to the first channel section. The extending direction of the second channel section is turned relative to the first channel section, and the extending direction of the second channel section is approximately vertical downward, so that the falling of grains 20 to be measured is accelerated by utilizing gravity.

Research shows that when the rolling wheel of the resistance-type moisture detection device rolls grains, if the grains to be detected are located in the middle area of the rolling wheel in the thickness direction, the detection result is relatively more accurate. Thus, the chute assembly 140 shown in fig. 2 is also provided with a guide structure for guiding the grain to be tested to move to the middle region in the thickness direction of the milling assembly. The guide structure can be that the slide way baffle plates on two sides or one side of the two sides are close to the middle area corresponding to the thickness direction of the rolling component, so that the channel space is folded towards the middle area, and grains to be detected are guided to move to the middle area in the thickness direction of the rolling component; the guide structure may also be a two sided chute fence extending obliquely to the chute bottom surface to cooperate to form a channel having a trapezoidal cross-sectional profile with the length of the bottom side of the trapezoid being less than the length of the top side, such that the area of the bottom surface of the channel is less than the area of the top surface of the channel, and the bottom surface of the channel corresponds to the middle region in the thickness direction of the rolling assembly. The grain to be measured moves along the bottom surface of the channel, so that the grain to be measured is guided to the middle area in the thickness direction of the rolling component. It will be appreciated that the guide formation may also be in the form of the letter V or U on the underside of the runner itself, the base of the letter V or U corresponding to the middle region of the rolling assembly in the thickness direction.

Referring to fig. 1 to 2, the rolling assembly includes a first rolling wheel 131 and a second rolling wheel 132, at least one of the first rolling wheel 131 and the second rolling wheel 132 is used for rolling the circumferential surface of the grain to be tested, and has a notch, so as to reduce the occurrence probability of the locking of the rolling wheels. The notch is arranged as shown in fig. 1, and the notch is in a V shape.

Referring to fig. 1 to 2, the cross-sectional profile of the first rolling wheel 131 or the second rolling wheel 132 is a closed figure consisting of a major arc and a straight line, so as to prevent grains from being accumulated in the chute channel for a long time, and prevent the rolling wheels from being locked to cause damage to the power source. Fig. 1 and 2 show that the cross-sectional profile of the first rolling wheel 131 is larger than a semicircle, i.e., a shape left after being cut off from a complete circle along a straight line section intersecting with a circumference.

Further, not shown in the figure, the groove-shaped grains are all provided on the circumferential surface of the grains 20 to be detected by rolling by the first rolling wheel 131 and the second rolling wheel 132, so that the problem that the moisture detection fails due to the slippage of grains between the two rolling wheels is reduced. The line of first rolling wheel 131 is different from the line of second rolling wheel 132, can effectively increase frictional force, is favorable to discharging the piece that rolls and form.

Referring to fig. 2, the rolling assembly further includes a first scraper 133, a second scraper 134, a first brush 135 and a second brush 136. The first scraper 133 and the second scraper 134 are used for scraping off larger grain residues adhered to the rolling wheel, so that the subsequent detection accuracy is prevented from being influenced; the first brush 135 and the second brush 136 are used for brushing off the grain residue adhered to the rolling wheel, so as to avoid affecting the subsequent detection accuracy.

Referring to fig. 9, the moisture measuring unit 180 detects a change in resistance between the first rolling gear 194 and the second rolling gear 195 through the contact 181, and thus can measure moisture contained in the grain 20 to be measured. In order to avoid the situation that no electric signal is collected, the number of the contact sheets 181 on the first rolling gear 194 and the second rolling gear 195 is more than two.

Referring to fig. 10 to 11, the transmission assembly includes a driving motor 191, a driving gear 192, a driven gear 193, a first rolling gear 194, a second rolling gear 195, a valley gear 196 and a brush gear 197, and the transmission relationship is as follows: the driving motor 191 directly drives the driving gear 192, and the driving gear 192 drives the driven gear 193 to rotate; the driven gear 193 transmits power to the first rolling gear 194, the brush gear 197 and the grain feeding gear 196 respectively, the first rolling gear 194 drives the second rolling gear 195 to complete power transmission of the whole grain moisture detection device 10, wherein the driven gear 193 and the grain feeding gear 196 are matched through bevel gears, and the power transmission direction is changed.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.