CN115561110A - Grain impurity analyzer - Google Patents

Abstract

The invention relates to the technical field of agricultural machinery, and provides a grain impurity analyzer, which comprises: the screening mechanism comprises a vibration device and a screening component in transmission connection with the vibration device, the screening component is driven by the vibration device to eccentrically vibrate so as to enable grains to be analyzed in the screening component to vibrate along a preset direction, and the preset direction is at least two directions; the screening assembly is provided with a feeding hole, a first blanking hole and a second blanking hole; the first blanking port is communicated with a feeding port of the impurity weighing device, so that the impurities screened by the screening mechanism enter the impurity weighing device to be weighed; the second blanking port is communicated with a feeding port of the net grain weighing device, so that the grains screened by the screening mechanism enter the net grain weighing device to be weighed. The impurity screening precision is improved, and the weighing accuracy is guaranteed.

Description

Grain impurity analyzer

Technical Field

The invention relates to the technical field of agricultural machinery, in particular to a grain impurity analyzer.

Background

The grain generally includes common crops such as wheat, corn or peanut. Taking wheat as an example, grains usually contain impurities with different sizes, such as large impurities or light impurities (small impurities), the impurities in the wheat need to be screened out before processing, and quality detection is needed in links of purchasing, storing and transporting and the like.

The existing grain impurity analyzer utilizes a double-shaft rotating motor to complete grain screening, grains can only vibrate on a screen of a screening mechanism along one direction, and the grain impurity analyzer cannot be matched with a screen structure to complete automatic screening and blanking of grains; meanwhile, in the use process of the existing screen structure, grains or impurities are easy to accumulate in the middle of the screen, so that part of grains or impurities cannot be automatically discharged; in addition, when the existing grain impurity analyzer is used for quality detection, the feeding port and the discharging port are respectively weighed, the quality of qualified grains is obtained through the weight difference of the feeding port and the discharging port, and the detection accuracy of the mode is poor.

Disclosure of Invention

The invention aims to provide a grain impurity analyzer, which at least partially solves the technical problems in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that:

a grain impurity analyzer, comprising:

the screening mechanism comprises a vibration device and a screening component in transmission connection with the vibration device, the screening component is driven by the vibration device to eccentrically vibrate so as to enable grains to be analyzed in the screening component to vibrate along a preset direction, and the preset direction is at least two directions; the screening assembly is provided with a feeding hole, a first blanking hole and a second blanking hole;

the first blanking port is communicated with a feeding port of the impurity weighing device, so that the impurities screened by the screening mechanism enter the impurity weighing device to be weighed;

the second blanking mouth is communicated with a feeding hole of the net grain weighing device, so that the grains screened out by the screening mechanism enter the net grain weighing device to be weighed.

In some embodiments, the impurity weighing device comprises a big impurity weighing device and a light impurity weighing device, the first blanking port comprises a big impurity blanking port and a light impurity blanking port, the big impurity blanking port is communicated with the feeding port of the big impurity weighing device, and the light impurity blanking port is communicated with the feeding port of the light impurity weighing device.

In some embodiments, the screen assemblies include:

the upper-layer screen comprises a first screen at the bottom and a first side wall in the circumferential direction, the first screen and the first side wall enclose an upper-layer screening cavity, and the large impurity blanking port is formed in the first side wall;

the middle-layer screen comprises a second screen at the bottom and a second side wall in the circumferential direction, the second screen and the second side wall enclose a middle-layer screening cavity, the first screen is arranged between the upper-layer screening cavity and the middle-layer screening cavity, and the second blanking port is formed in the second side wall;

the lower layer feed bin, the second screen cloth set up in the middle level screening chamber with between the lower layer feed bin, light miscellaneous blanking mouth is seted up in the lateral wall of lower layer feed bin.

In some embodiments, a first conical hopper is arranged in a middle position of the first screen, and the first conical hopper is upwards convex relative to the screen surface of the first screen; and/or the presence of a gas and/or,

the middle position of the second screen is provided with a second taper hopper which is upwards raised relative to the screen surface of the second screen.

In some embodiments, the vibration device comprises:

the double-shaft motor is mounted on the screening mechanism through a connecting disc and comprises a first output shaft and a second output shaft;

the balancing weight is mounted on the first output shaft;

the eccentric mechanism is installed in the connecting disc, the eccentric mechanism comprises a connecting block and an arc-shaped slide way fixedly connected with the connecting block, the connecting block is fixedly connected with the second output shaft, and a sliding block is installed in the arc-shaped slide way in a sliding mode.

In some embodiments, the upper screen further comprises:

the first material pushing plate is arranged in the upper screening cavity, one end of the first material pushing plate is rotatably arranged on the inner side of the first side wall through a first hinge, and the first material pushing plate can swing around the first hinge.

In some embodiments, the upper screen further comprises:

one end of the first hinge baffle is arranged on the inner side of the first side wall and shields the first hinge; and/or the presence of a gas in the atmosphere,

the first discharging baffle is arranged on the inner side of the first side wall, and one end of the first discharging baffle is shielded by the large impurity blanking port.

In some embodiments, the intermediate screen further comprises:

the second material pushing plate is arranged in the middle-layer screening cavity, one end of the second material pushing plate is rotatably installed on the inner side of the second side wall through a second hinge, and the second material pushing plate can swing around the second hinge.

In some embodiments, the intermediate screen further comprises:

one end of the second folding baffle is mounted on the inner side of the second side wall and shields the second folding; and/or the presence of a gas in the atmosphere,

and one end of the second discharging baffle is arranged on the inner side of the second side wall and shields the second blanking port.

In some embodiments, a rapping structure is provided in said first screen and/or said second screen.

In some embodiments, the vibration device further comprises:

the connecting plate is provided with a first opening, the balancing weight is connected with the first output shaft through the connecting plate, and the first output shaft penetrates through the first opening;

the connecting block is provided with a second opening, the eccentric mechanism is connected with the second output shaft through the connecting block, and the second output shaft penetrates through the second opening.

In some embodiments, the sliding block is provided with a ball bearing, and the ball bearing is rotatably arranged on the sliding block and is positioned on at least one contact surface of the sliding block, which is contacted with the arc-shaped slide way.

In some embodiments, the contact surface of the slider is provided with a mounting hole, and the ball is rotatably embedded in the mounting hole.

In some embodiments, the bulk-impurity weighing device comprises:

a heavy impurity weighing scale;

the big impurity feed channel is communicated with the big impurity blanking port;

the big impurity blanking valve is arranged in the big impurity feeding channel and opens or closes the big impurity feeding channel;

the large impurity weighing hopper is arranged at the bottom end of the large impurity feeding channel and communicated with the large impurity feeding channel, and the large impurity weighing hopper is arranged on the large impurity weighing scale.

In some embodiments, the bulk-impurity weighing apparatus further comprises:

and the large impurity receiving hopper is detachably arranged on the support frame of the grain analyzer.

In some embodiments, the light-weight weighing apparatus comprises:

weighing the light impurities;

the light impurity feeding channel is communicated with the light impurity blanking port;

the light impurity blanking valve is arranged in the light impurity feeding channel and opens or closes the light impurity feeding channel;

the light impurity weighing hopper is arranged at the bottom end of the light impurity feeding channel and communicated with the light impurity feeding channel, and the light impurity weighing hopper is arranged on the light impurity weighing scale.

In some embodiments, the light-to-clutter weighing apparatus further comprises:

the light impurity receiving hopper is detachably arranged on the supporting frame of the grain analyzer.

In some embodiments, the net grain weighing device comprises:

a grain metering scale;

the grain feeding channel is communicated with the grain blanking port;

the grain blanking valve is arranged in the grain feeding channel and opens or closes the grain feeding channel;

the grain weighing hopper is arranged at the bottom end of the grain feeding channel and communicated with the grain feeding channel, and the grain weighing hopper is arranged on a grain metering scale.

In some embodiments, the net grain weighing device further comprises:

the light impurity separator is arranged between the grain feeding channel and the grain blanking port;

the light impurity separator comprises a feeding port, a baffle, an impurity removing port and an impurity removing discharging port, wherein the impurity removing port and the impurity removing discharging port are communicated with an impurity removing negative pressure pipeline, and the baffle is arranged between the feeding port and the impurity removing port.

In some embodiments, the net grain weighing device further comprises:

and the conveying negative pressure pipeline is communicated with the grain blanking bin so as to suck grains in the grain receiving hopper into a downstream inspection platform.

In one or more of the above embodiments, the grain impurity analyzer provided by the present invention has the following technical effects:

(1) In the grain impurity analyzer provided by the invention, the screening mechanism is provided with a plurality of blanking ports, and a plurality of weighing devices are correspondingly arranged, so that various impurities and grains can be accurately discharged to the corresponding weighing devices in the working process, the grains and the impurities are weighed in the respective weighing devices, the precision and the measuring range of the weighing devices can be set according to the estimated values of the grains and the impurities, the weighing accuracy is improved, the impurity content calculation accuracy is further ensured, and the grain impurity analyzer can be widely applied to the impurity content detection of various materials.

(2) In the grain impurity analyzer provided by the invention, the screening mechanism adopts the double-shaft rotation driving device, and the eccentric mechanism is designed into the form of the arc-shaped slideway, so that in the working process, when the double-shaft rotation driving device rotates towards one direction, the balancing weight moves to one end of the eccentric mechanism along the arc-shaped slideway, and grains vibrate on the screen along the clockwise direction or the anticlockwise direction; when the rotation direction of the double-shaft rotation driving device is changed, the balancing weight moves to the other end of the eccentric mechanism along the arc-shaped slide way, so that the vibration direction of grains on the screen is changed; the change of grain vibration direction can be realized without stopping the change of the included angle of the axis of the balance weight after the operation of the double-shaft rotary driving device, so that the grain bidirectional vibration is realized, and the automatic discharging is realized.

(3) In the grain impurity analyzer provided by the invention, the screening mechanism further comprises a first material pushing plate and/or a second material pushing plate, when the material pushing plate vibrates along the extending direction (namely, the first direction) of the first material pushing plate and/or the second material pushing plate, the grain moves along the inner surface of the material pushing plate and cannot be discharged from a blanking port shielded by the first material pushing plate and/or the second material pushing plate; and after the screening is finished, the vibration direction of the grains is changed after the rotation direction of the double-shaft rotation driving device is changed, the grains are discharged along a grain discharging channel between the first material pushing plate and/or the second material pushing plate and the corresponding side wall, and the automatic discharging is realized. Through the cooperation of first scraping wings and/or second scraping wings and two-way revolution mechanic, compare in current screening mechanism and can only accomplish through opening the bin outlet when cereal vibrates along an orientation and arrange the material and realize automatic, high efficiency, especially accomplish automatic row material through the vibration direction that changes cereal, have obvious technical advantage.

(4) In the grain impurity analyzer provided by the invention, the middle parts of the screen meshes of the screening mechanism are respectively provided with the conical hopper, the conical hopper can realize disturbance when grains or impurities are screened, the material storage at the middle position of the screen meshes is avoided, the grains or the impurities are effectively prevented from remaining on the screen meshes, and the calculation precision of the impurity content is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic view of an overall structure of a grain impurity analyzer according to an embodiment of the present invention;

fig. 2 is a second schematic view of an overall structure of a grain impurity analyzer according to an embodiment of the present invention;

FIG. 3 is a schematic view of the overall structure of the screening mechanism according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an upper screen in the screening mechanism according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a middle screen of the screening mechanism according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a lower layer bin in the screening mechanism according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a light impurity separator in the screening mechanism according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a base and a vibrating device of a screening mechanism according to an embodiment of the present invention;

FIG. 9 is a schematic view of a vibrating device of a screening mechanism according to an embodiment of the present invention;

fig. 10 is a second schematic structural view of an upper screen in the screening mechanism according to an embodiment of the present invention;

fig. 11 is a second schematic structural diagram of a middle-layer screen in the screening mechanism according to an embodiment of the present invention.

Wherein the reference numbers in the figures are:

1-a screening mechanism, 2-a large impurity weighing device, 3-a light impurity weighing device, 4-a clean grain weighing device and 5-a box body;

11-vibrating means, 12-screen assemblies;

111-a double-shaft motor, 112-a first output shaft, 113-a second output shaft, 114-a balancing weight;

115-connecting disc, 116-arc slideway, 117-connecting block, 118-sliding block and 119-connecting plate;

121-an upper layer screen, 1211-a first screen mesh, 1212-a first side wall and 1213-a large impurity blanking port;

1214-a first cone, 1215-a first material pushing plate, 1216-a first hinge, 1217-a first hinge baffle;

1218-first discharge baffle, 1219-first adjustment lever, 12110-first locking lever;

12111-first viewport;

122-middle screen, 1221-second screen, 1222 second side wall, 1223-second blanking port;

1224-second cone, 1225-second pusher, 1226-second hinge, 1227-second hinge baffle;

1228-a second discharge baffle, 1229-a second adjusting rod, 12210-a second locking rod;

12211-second observation hole, 123-lower layer material-containing bin, 1231-light impurity blanking port;

124-spring, 125-base, 126-cushion;

21-big impurity feed channel, 22-big impurity blanking valve, 23-big impurity weighing hopper and 24-big impurity receiving hopper;

31-light impurity feeding channel, 32-light impurity blanking valve, 33-light impurity weighing hopper and 34-light impurity receiving hopper;

41-grain feeding channel, 42-grain blanking valve, 43-grain weighing hopper, 44-light impurity separator;

45-a conveying negative pressure pipeline, 451-a baffle, 452-a impurity removing port, 453-an impurity removing discharge port;

51-box door, 52-observation window, 53-support frame.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

The invention provides a grain impurity analyzer, which aims to solve the technical problems that in the prior art, when grains such as wheat are analyzed, the impurity screening precision is poor, and the weighing accuracy of the screened grains and various impurities is low.

In one embodiment, as shown in fig. 1 and 2, the grain impurity analyzer provided by the invention comprises a screening mechanism 1, an impurity weighing device and a net grain weighing device 4. The screening mechanism 1 comprises a vibrating device 11 and a screening assembly 12 in transmission connection with the vibrating device 11, wherein the screening assembly 12 is driven by the vibrating device 11 to vibrate eccentrically so as to enable grains to be analyzed in the screening assembly 12 to vibrate along a preset direction, and the preset direction is at least two directions, such as a clockwise direction and a counterclockwise direction; the screening assembly 12 is provided with a feeding hole, a first blanking hole and a second blanking hole 1223, and the first blanking hole is communicated with the feeding hole of the impurity weighing device so that the impurities screened by the screening mechanism 1 enter the impurity weighing device for weighing; the second blanking port 1223 is communicated with a feed port of the net grain weighing device 4, so that grains sieved by the sieving mechanism 1 enter the net grain weighing device 4 to be weighed.

In actual products, main parts of the grain and impurity analyzer can be integrated in a box 5, a door 51 which can be opened and closed is arranged on the front surface of the box 5, and an observation window 52 is arranged on the door 51 or on the side wall of the box 5, so that the working condition in the analyzer can be conveniently checked. A plurality of support frames 53 can be arranged in the box body 5, and the support frames 53 are used for installing core components such as the screening mechanism 1, the net grain weighing device 4 and the impurity weighing device.

In order to further distinguish impurities and improve the weighing accuracy of the impurities, the impurities can be respectively screened out and respectively blanked. In some embodiments, the impurity weighing device comprises a big impurity weighing device 2 and a light impurity weighing device 3, the first blanking port comprises a big impurity blanking port 1213 and a light impurity blanking port 1231, the big impurity blanking port 1213 is communicated with the feeding port of the big impurity weighing device 2, and the light impurity blanking port 1231 is communicated with the feeding port of the light impurity weighing device 3. That is, the impurity weighing device may be further divided into a large impurity weighing device 2 and a light impurity weighing device 3 according to the nature of the impurity, and correspondingly, the first blanking port includes a large impurity blanking port 1213 and a light impurity blanking port 1231, and the sieving assembly 12 has three blanking ports, i.e., a large impurity blanking port 1213 for large impurity blanking, a light impurity blanking port 1231 for light impurity blanking, and a second blanking port 1223 for grain blanking after the impurity is sieved.

In the working process, for accurate measurement, the grains are usually quantitatively screened, a batch of grains to be analyzed, for example, 2.5kg of grains, is conveyed into the screening component 12 through the feed inlet, the large impurities screened by the screening component 12 enter the large impurity weighing device 2 through the large impurity discharge port 1213 to obtain the weight of the large impurities, the light impurities screened by the screening component 12 enter the light impurity weighing device 3 through the light impurity discharge port 1231 to obtain the weight of the light impurities, and the grains screened by the screening component 12 enter the clean grain weighing device 4 through the second discharge port 1223 to obtain the weight of the grains. The accurate weight of each component can be obtained through weighing respectively. Wherein, the grain to be analyzed can be wheat, corn or peanut, etc.

Can also set up the display screen on box 5, the result that obtains of weighing can be synchronous output on the display screen to the staff can directly perceivedly see the result of weighing.

In some embodiments, with continued reference to fig. 1 and 2, the bulk impurity weighing device 2 includes a bulk impurity scale, a bulk impurity feed channel 21, a bulk impurity blanking valve 22, and a bulk impurity weighing hopper 23; the big impurity feed channel 21 is communicated with the big impurity blanking port 1213, the big impurity blanking valve 22 is arranged in the big impurity feed channel 21, and the big impurity feed channel 21 is opened or closed; the large impurity weighing hopper 23 is arranged at the bottom end of the large impurity feeding channel 21 and communicated with the large impurity feeding channel 21, and the large impurity weighing hopper 23 is arranged on the large impurity weighing scale.

In the working process, when the screening mechanism 1 is in the screening working state, the big impurity blanking valve 22 is in the closing state, after the preset time, the screening working state is finished, when the screening mechanism 1 enters the discharging working state, the big impurity blanking valve 22 is opened, at the moment, the big impurity feeding channel 21 is opened, the big impurity screened out by the upper screening layer enters the big impurity weighing hopper 23 through the big impurity feeding channel 21, and the big impurity weighing is completed by the big impurity weighing scale.

When the screening mechanism 1 works, screening is performed according to material batches, one batch is screened, and then the next batch is subjected to quantitative screening, so that the large impurities weighed by the large impurity metering device each time correspond to the large impurities in the materials of each batch. However, since the amount of the large impurities in each batch is not large, and it is cumbersome to discharge the large impurities each time the weighing is completed, in some embodiments, the large impurity weighing device 2 further includes a large impurity receiving hopper 24, and the large impurity receiving hopper 24 is detachably mounted on the supporting frame 53 of the grain analyzer. Therefore, after each batch of the heavy impurities is weighed, the weighed heavy impurities are temporarily stored in the heavy impurity receiving hopper 24, after the heavy impurities are filled in the heavy impurity receiving hopper 24, the heavy impurities receiving hopper 24 is taken down from the supporting frame 53, and the heavy impurities are poured into a designated position, so that the material pouring workload is reduced. In particular, the large receiving hopper 24 may be in the form of a drawer that is drawn out for emptying when full.

In some embodiments, as shown in fig. 1 and 2, the light impurity weighing device 3 includes a light impurity scale, a light impurity feed channel 31, a light impurity blanking valve 32, and a light impurity weighing hopper 33; the light impurity feeding channel 31 is communicated with the light impurity blanking port 1231, and the light impurity blanking valve 32 is arranged in the light impurity feeding channel 31 and opens or closes the light impurity feeding channel 31; the light impurity weighing hopper 33 is arranged at the bottom end of the light impurity feeding channel 31 and communicated with the light impurity feeding channel 31, and the light impurity weighing hopper 33 is arranged on the light impurity weighing scale.

In the working process, when the screening mechanism 1 is in the screening working state, the light impurity blanking valve 32 is in the closing state, after the preset time, the screening working state is finished, when the screening mechanism 1 enters the discharging working state, the light impurity blanking valve 32 is opened, at the moment, the light impurity feeding channel 31 is opened, the screened light impurities enter the light impurity weighing hopper 33 through the light impurity feeding channel 31, and the light impurity weighing is completed by using the light impurity weighing scale.

When the screening mechanism 1 works, screening is performed according to material batches, one batch is screened, and then the next batch is quantitatively screened, so that the light impurities weighed by the light impurities metering device each time correspond to the light impurities in the materials of each batch. However, since the amount of light impurities in each batch is not large, and it is cumbersome to discharge the light impurities each time the weighing is completed, in some embodiments, the light impurity weighing device 3 further includes a light impurity receiving hopper 34, and the light impurity receiving hopper 34 is detachably mounted on the supporting frame 53 of the grain analyzer. Thus, after each batch is weighed, the weighed light impurities are temporarily stored in the light impurity receiving hopper 34, after the light impurities are filled in the light impurity receiving hopper 34, the light impurity receiving hopper 34 is taken down from the support frame 53, and the light impurities are poured into a designated position, so that the material pouring workload is reduced. Specifically, the light impurity receiving hopper 34 may be in the form of a drawer, and after being filled, the light impurity receiving hopper can be drawn out for pouring.

In some embodiments, as shown in fig. 1 and 2, the net grain weighing device 4 includes a grain weigher, a grain feeding channel 41, a grain blanking valve 42 and a grain weighing hopper 43, wherein the grain feeding channel 41 is communicated with the grain blanking port, the grain blanking valve 42 is disposed in the grain feeding channel 41 and opens or closes the grain feeding channel 41; the grain weighing hopper 43 is arranged at the bottom end of the grain feeding channel 41 and communicated with the grain feeding channel 41, and the grain weighing hopper 43 is arranged on a grain metering scale.

In the course of the work, when screening mechanism 1 is in screening operating condition, cereal blanking valve 42 is in the closed condition, and through the time of predetermineeing, screening operating condition ends, and when screening mechanism 1 got into row material operating condition, open cereal blanking valve 42, cereal feedstock channel 41 opened this moment, and the cereal that sieves out gets into cereal weighing hopper 43 through cereal feedstock channel 41 in to utilize cereal metering scale to accomplish big miscellaneous weighing.

The net grain weighing device 4 further comprises a conveying negative pressure pipeline 45, and the conveying negative pressure pipeline 45 is communicated with the grain blanking bin so as to suck grains in the grain receiving hopper into a downstream inspection platform.

Like this, through setting up a plurality of blanking mouths in grain impurity analysis appearance's screening mechanism 1, and correspond and set up a plurality of weighing device, in the course of the work, can be with all kinds of impurity, the accurate weighing device who discharges to corresponding of cereal, cereal and impurity are weighed in respective weighing device, can set for the precision and the range of weighing device according to the estimate value of cereal and impurity, the accuracy of weighing has been improved, then guaranteed impurity content and calculated the accuracy, but the wide application is in the impurity content detection of all kinds of materials.

In some embodiments, in order to cooperate with multiple blanking ports for blanking, the screening assembly 12 may have a multi-layer sieve structure, as shown in fig. 3, the screening assembly 12 includes an upper layer sieve 121, a middle layer sieve 122 and a lower layer receiving bin 123, the upper layer sieve 121 is used for sieving out large-particle impurities (i.e. large impurities) from the grain to be analyzed, removing the large-particle impurities from the grain to be analyzed to enter the middle layer sieve 122, sieving out small-particle impurities (i.e. small impurities or light impurities) from the middle layer sieve 122, the sieved light impurities fall into the lower layer receiving bin 123, and the sieved grain falls into the clean grain weighing device 4 through the second blanking port 1223.

Specifically, as shown in fig. 4, the upper screen 121 includes a first screen 1211 located at the bottom and a first side wall 1212 located in the circumferential direction, the first screen 1211 and the first side wall 1212 enclose an upper screen 121 separation cavity, and the large impurity blanking port 1213 is opened at the first side wall 1212; when grains to be analyzed enter the screening assembly 12 through the feeding hole, the grains fall into the upper-layer screening 121 sub-cavity, screening is carried out in the upper-layer screening 121 sub-cavity through the first screen 1211, the grains and light impurities fall into the middle-layer screening 122 of the next layer through meshes of the first screen 1211, the large impurities enter the large impurity weighing device 2 through the large impurity blanking hole 1213, and the large impurities are weighed by the large impurity weighing device 2.

As shown in fig. 5, the middle screen 122 includes a second screen 1221 at the bottom and a second side wall 1222 in the circumferential direction, the second screen 1221 and the second side wall 1222 enclose a middle screen 122 sub-cavity, the first screen 1211 is disposed between the upper screen 121 sub-cavity and the middle screen 122 sub-cavity, and the second blanking port 1223 is opened in the second side wall 1222. The grain to be analyzed (the grain to be analyzed includes grain and light impurities) screened by the upper layer screen 121 falls into the middle layer screen 122 chamber, and is screened by the second screen 1221 in the middle layer screen 122 chamber, the light impurities fall into the lower layer receiving bin 123 of the next layer through the meshes of the second screen 1221, the grain enters the clean grain weighing device 4 through the grain blanking port, and the grain is weighed by the grain weighing device.

As shown in fig. 6, the second screen 1221 is disposed between the middle-layer screen 122 and the lower-layer material bin 123, the light impurity blanking port 1231 is disposed on a side wall of the lower-layer material bin 123, light impurities enter the light impurity weighing device 3 through the light impurity blanking port 1231, and the light impurities are weighed by the light impurity weighing device. In order to avoid material accumulation, the bottom of the lower material receiving bin 123 is in a conical structure.

It should be appreciated that the mesh size of the second mesh 1221 is smaller than the mesh size of the first mesh 1211.

Because screening subassembly 12 can vibrate in the course of the work, in order to avoid the part collision and the damage that rigid connection caused, all set up flexible pipeline between the feed inlet of big miscellaneous blanking mouth 1213 and big miscellaneous weighing device 2, between the feed inlet of light miscellaneous blanking mouth 1231 and light miscellaneous weighing device 3 to and between the feed inlet of cereal blanking mouth and clean grain weighing device 4 and communicate. For example, the corresponding blanking port and the corresponding feed port are communicated through a cloth bag (not shown in the figure), one end of the cloth bag is fixed on the blanking port through a hoop, and the other end of the cloth bag is fixed on the corresponding feed port through the hoop.

In order to further improve the accuracy of grain weighing, before the grains enter the net grain weighing device 4, the grains may be subjected to secondary separation of light impurities by a light impurity separator 44, as shown in fig. 7, wherein the light impurity separator 44 is arranged between the grain feeding channel 41 and the grain blanking port; the light impurity separator 44 comprises a feeding hole, a baffle 451, an impurity removing hole 452 communicated with an impurity removing negative pressure pipeline, and an impurity removing discharging hole 453, wherein the baffle 451 is arranged between the feeding hole and the impurity removing hole 452. For convenience of description, taking the direction shown in fig. 7 as an example, the grains with a small amount of light impurities enter the feeding hole of the light impurities separator 44 and move downwards in the channel on the left side of the baffle 451, the impurities removing port 452 is communicated with the negative pressure pipeline, when the grains reach the bottom position of the baffle 451, the small amount of light impurities mixed in the grains are sucked out through the negative pressure pipeline, and the rest of the grains continue to descend and enter the clean grain weighing device 4 through the impurities removing discharge port 453.

In the specific embodiment, the grain impurity analyzer provided by the invention comprises a screening mechanism 1 for automatically screening impurities and grains, wherein the screening mechanism 1 is arranged in a box body 5 of the grain impurity analyzer, and a large impurity weighing device 2, a clean grain weighing device 4 and a light impurity weighing device 3 are respectively and correspondingly arranged below three blanking ports of the screening mechanism 1. Wherein, the big miscellaneous directly gets into big miscellaneous weighing device 2, sieves out the cereal and directly gets into net grain weighing device 4, and light miscellaneous directly gets into light miscellaneous weighing device 3 or gets into light miscellaneous weighing device 3 through light miscellaneous separator 44, and the cereal that separates out through light miscellaneous separator 44 gets into net grain weighing device 4. The grain impurity analyzer is used for separating powdery grains and granular grains, and can be used for screening materials of various sizes by replacing the internal screen. The screening process has two modes of screening and discharging, the screening amplitude can be selected and matched, the frequency is adjustable, the structural design is ingenious, the screening device is firm and durable, the noise is low, and the screening device is free of material mixing and residue and can be widely used for detecting the impurity content of various materials.

During the operation of the sieving mechanism 1, the screens (including the first screen 1211 and the second screen 1221) are vibrated while rotating, and during the rotation, a material accumulation occurs in the middle of the screens due to the centrifugal force. In order to solve the problem of material accumulation, the middle parts of the screen meshes of the screening mechanism 1 of the grain impurity analyzer are provided with the conical hoppers, so that disturbance can be realized during screening of grains or impurities by the conical hoppers, material storage at the middle positions of the screen meshes is avoided, residues of the grains or the impurities on the screen meshes can be effectively avoided, and the calculation accuracy of the impurity content is improved.

Specifically, as shown in fig. 4, a first conical hopper 1214 is arranged in a middle position of the first screen 1211, the first conical hopper 1214 protrudes upward relative to the screen surface of the first screen 1211, and material disturbance is realized through a protruding inclined surface, so that material accumulation and residue are avoided. As shown in fig. 5, a second funnel 1224 is disposed at a middle position of the second screen 1221, the second funnel 1224 protrudes upward relative to the screen surface of the second screen 1221, and material disturbance is achieved by the protruding slope, so that material accumulation and residue are avoided. In addition, the bottom wall of the lower layer storage bin 123 is also in the form of an integral conical hopper, and the first conical hopper 1214, the second conical hopper 1224 and the integral conical hopper can prevent materials from being accumulated on the screen, so that the situation that impurities cannot be discharged cannot occur. Two first observation holes 12111 are provided in the side wall of the upper layer screen 121, two second observation holes 12211 are provided in the side wall of the middle layer screen 122, one of the two observation holes in the same layer is used for polishing, the other is used for observation, so as to check whether grain or impurities remain, and when the device is not used, the first observation holes 12111 and the second observation holes 12211 are blocked by using rubber plugs.

In some embodiments, in order to avoid clogging of the mesh openings by material, rapping structures may also be provided in said first screen 1211 and/or said second screen 1221. Wherein the rapping structure in the first screen 1211 is a column movably disposed in the first screening chamber, and the column bounces and falls back and forth with the vibration of the first screen 1211 to rap the first screen 1211 to extrude the straw and other materials jammed in the first screen 1211, thereby preventing the first screen 1211 from being jammed. The rapping structure in the second screen 1221 is a sphere movably placed in the second screening cavity, and the sphere bounces and falls back and forth along with the vibration of the second screen 1221 so as to rap the second screen 1221 and shake down the material blocked in the second screen 1221, thereby avoiding the second screen 1221 from being blocked.

In some embodiments, as shown in fig. 8 and 9, the vibration device 11 includes a two-axis motor 111, a weight 114, and an eccentric mechanism; wherein, the double-shaft motor 111 is mounted on the sieving mechanism 1 through a connecting disc 115, the double-shaft motor 111 comprises a first output shaft 112 and a second output shaft 113, and the counterweight 114 is mounted on the first output shaft 112; the eccentric mechanism is installed in the connecting disc 115, the eccentric mechanism comprises a connecting block 117 and an arc-shaped slide way 116 fixedly connected with the connecting block 117, the connecting block 117 is fixedly connected with the second output shaft 113, and a sliding block 118 is installed in the arc-shaped slide way 116 in a sliding mode.

The vibrating device 11 adopts a double-shaft rotation driving device, and the eccentric mechanism is designed into an arc-shaped slideway 116, so that in the working process, when the double-shaft rotation driving device rotates towards one direction, the balancing weight 114 moves to one end of the eccentric mechanism along the arc-shaped slideway 116, and grains vibrate on the screen along the clockwise direction or the anticlockwise direction; when the rotation direction of the double-shaft rotation driving device is changed, the balancing weight 114 moves to the other end of the eccentric mechanism along the arc-shaped slide way 116, so that the vibration direction of grains on the screen is changed; the change of grain vibration direction can be realized without stopping the change of the included angle of the axis of the counter weight after the operation of the double-shaft rotary driving device, so that the bidirectional vibration of grains is realized, and the automatic discharging is realized.

Further, the vibration device 11 further includes a connecting plate 119, a first opening is formed in the connecting plate 119, the counterweight block 114 is connected to the first output shaft 112 through the connecting plate 119, and the first output shaft 112 passes through the first opening; a second opening is formed in the connecting block 117, the eccentric mechanism is connected with the second output shaft 113 through the connecting block 117, and the second output shaft 113 penetrates through the second opening.

That is to say, the vibrating device 11 is provided with a dual-shaft motor 111, one output shaft of the dual-shaft motor 111 is connected to a counterweight 114 through a connecting plate 119, the other output shaft of the dual-shaft motor 111 is connected to an eccentric mechanism through a connecting block 117, an arc-shaped slide 116 is provided in the eccentric mechanism, and a slide block 118 is provided on the arc-shaped slide 116.

During operation, when the dual-shaft motor 111 rotates in one direction, the sliding block 118 moves to one end of the eccentric mechanism along the arc-shaped sliding way 116, so that grains vibrate on the screen in a clockwise or counterclockwise direction; when the rotation direction of the dual-shaft motor 111 is changed, the slide block 118 moves to the other end of the eccentric mechanism along the arc-shaped slide way 116, and the vibration direction of grains on the screen is changed.

With reference to fig. 8 and 9, the upper motor shaft of the dual-shaft motor 111 is the second output shaft 113, and is connected to the eccentric mechanism through a connecting block 117, an arc-shaped slide way 116 is disposed in the eccentric mechanism, the connecting block 117 is connected to the center of the eccentric mechanism, so that the eccentric mechanism is symmetrical about the connecting line between the connecting block 117 and the center of the upper motor shaft, and a slide block 118 is disposed in the arc-shaped slide way 116 and slides along the slide way. Preferably, the arc-shaped slide way 116 is provided with buffer pads 126 at both ends thereof, so as to prevent the slide block 118 from being damaged by too fast impact. The lower motor shaft of the double-shaft motor 111 is a first output shaft 112, and is connected with a counterweight 114 through a connecting plate 119.

Specifically, the connecting block 117 and the connecting plate 119 are provided with openings, the openings are respectively connected with an upper motor shaft and a lower motor shaft, the installation angles of the eccentric mechanism and the balancing weight 114 can be adjusted through the openings, each opening is provided with a screw hole, the size of the opening is adjusted through a screw, and the connecting block 117 and the connecting plate 119 are respectively fixed on the two motor shafts.

Further, the biaxial motor 111 is attached to the lower surface of the connection plate 115, and the upper surface of the connection plate 115 is connected to the sieving mechanism 1, and transmits the vibration generated by the vibration device 11 to the sieving mechanism 1. The lower surface of connection pad 115 is connected with the one end of the spring 124 of a plurality of array settings, and the base 125 is connected to the other end of a plurality of springs 124, and the lower extreme of base 125 is provided with a plurality of shock pads.

In order to avoid the clamping stagnation when the sliding blocks 118 move along the arc-shaped slide ways 116 and ensure the smoothness, the sliding blocks 118 are provided with rolling balls, and the rolling balls are rotatably arranged on the sliding blocks 118 and are positioned on at least one contact surface of the sliding blocks 118, which is in contact with the arc-shaped slide ways 116.

Specifically, the contact surface of the slider 118 is provided with a mounting hole, and the ball is rotatably embedded in the mounting hole.

In this embodiment, when the dual-axis motor 111 rotates clockwise (looking down), the slide block 118 in the eccentric mechanism moves to position a (see fig. 9), and generates a counterclockwise angle offset with the counterweight block 114 (the central line of the upper motor shaft connecting slide block 118 generates a counterclockwise offset angle on the horizontal plane projection relative to the central line of the lower motor shaft connecting counterweight block 114), the grains on the two screens will move counterclockwise around the center of the screens, and at this time, the grains can be screened, and the grains will not be discharged from the discharge ports (the discharge ports are respectively located at the rear portions of the two material pushing plates and are blocked). If the dual-axis motor 111 rotates counterclockwise, the slide block 118 in the eccentric mechanism moves to the position B, and the angle between the slide block and the counterweight block 114 becomes a clockwise angle offset (the center line of the upper motor shaft connecting slide block 118 generates a clockwise offset angle on the horizontal plane projection relative to the center line of the lower motor shaft connecting counterweight block 114), at this time, the grains on the screen move clockwise around the center of the screen, and the grains are discharged from the discharge hole. Through changing the direction of rotation of the motor, the grains move anticlockwise or clockwise, and the functions of screening and discharging are switched. In the prior art, as the sliding block at the sliding position is not adopted, the eccentric angle of the sliding block is fixed and unchanged, and no matter the motor rotates clockwise or anticlockwise, the materials on the sieve only rotate along the same direction, so that the function of changing the movement direction of the materials cannot be realized. Or the double-shaft motor 111 can rotate anticlockwise to sieve and then rotate clockwise to discharge materials. When the screening mechanism 1 can automatically rotate in two directions clockwise or counterclockwise, in cooperation with the screening mechanism, in order to avoid material accumulation, pushing structures can be respectively arranged in the upper layer sieve 121 and the middle layer sieve 122 so as to push the material to the middle position, and effective screening is realized. Specifically, referring to fig. 4, the upper sieve 121 further includes a first material pushing plate 1215, the first material pushing plate 1215 is disposed in the sub-cavity of the upper sieve 121, one end of the first material pushing plate 1215 is rotatably mounted on the inner side of the first sidewall 1212 through a first hinge 1216, the first material pushing plate 1215 can swing around the first hinge 1216, so as to adjust a material pushing position according to a material type, and the first material pushing plate 1215 also has a function of shielding a blanking port, thereby preventing an error blanking from occurring during sieving vibration.

Further, the upper screen 121 further includes a first hinge baffle 1217, and one end of the first hinge baffle 1217 is mounted on the inner side of the first sidewall 1212 and shields the first hinge 1216; in the working process, the material can be piled up in the position of first hinge 1216, and through setting up first hinge baffle 1217, can effectively avoid the material to get into first hinge 1216 position, avoid the material to pile up in this department, improved material screening performance.

As shown in fig. 4, in this embodiment, the upper screen 121 may further include a first discharging baffle 1218, and one end of the first discharging baffle 1218 is mounted on the inner side of the first side wall 1212 and shields the large trash opening 1213, so as to prevent the material from flying out of the large trash opening 1213 during the screening process, and cooperate with the first material pushing plate 1215 to further prevent the occurrence of a false blanking condition.

Similar to the structure of the upper screen 121, please refer to fig. 5, the middle screen 122 further includes a second material pushing plate 1225, the second material pushing plate 1225 is disposed in the sub-cavity of the middle screen 122, one end of the second material pushing plate 1225 is rotatably mounted on the inner side of the second sidewall 1222 through a second hinge 1226, and the second material pushing plate 1225 can swing around the second hinge 1226 to open or block the second blanking opening 1223. So as to adjust the material pushing position according to the material type, the second material pushing plate 1225 also has the function of shielding the blanking port, and the mistaken blanking is avoided during the screening vibration.

In some embodiments, the middle screen 122 further includes a second folding flap 1227, one end of the second folding flap 1227 is installed at the inner side of the second sidewall 1222 and covers the second folding flap 1226; in the course of the work, the material can pile up and fold page or leaf 1226's position at the second, through setting up the second baffle 1227 of folding page or leaf, can effectively avoid the material to get into the second and fold page or leaf 1226 position, avoids the material to pile up in this department, has improved material screening performance.

The middle-layer screen 122 further includes a second discharging baffle 1228, one end of the second discharging baffle 1228 is installed inside the second side wall 1222 and shields the second blanking opening 1223, so that the second material pushing plate 1225 jointly achieves the technical effect of avoiding mistaken blanking.

In the above embodiment, the grain impurity analyzer provided by the present invention further includes the first material pushing plate 1215 and/or the second material pushing plate 1225, when the grain is vibrated along the direction (i.e. the first direction) in which the first material pushing plate 1215 and/or the second material pushing plate 1225 extends, the grain moves along the inner surface of the material pushing plate and is not discharged from the blanking port blocked by the first material pushing plate 1215 and/or the second material pushing plate 1225; after the screening is finished, the vibration direction of the grains is changed after the rotation direction of the double-shaft rotation driving device is changed, the grains are discharged along the grain discharging channel between the first material pushing plate 1215 and/or the second material pushing plate 1225 and the corresponding side wall, and the automatic discharging is realized. Through the cooperation of first material pushing plate 1215 and/or second material pushing plate 1225 with the two-way revolution mechanic, compared with the existing sieving mechanism 1, when the grains vibrate along one direction, the automation and high efficiency can be realized only by opening the discharge opening to complete the discharge, especially the automatic discharge is completed by changing the vibration direction of the grains, which has obvious technical advantages.

On the basis of the above-described embodiments, in order to improve the manipulability of the ejector plates, as shown in fig. 10 and 11, the first ejector plate 1215 and the second ejector plate 1225 may adjust the opening angle in the counterclockwise direction, wherein the first adjustment rod 1219 adjusts the opening size of the first ejector plate 1215, the first locking rod 12110 fixes the position of the first ejector plate 1215, the second adjustment rod 1229 adjusts the opening size of the second ejector plate 1225, and the second locking rod 12210 fixes the position of the second ejector plate 1225. In this embodiment, the opening angles of the first material pushing plate 1215 and the second material pushing plate 1225 can be adjusted in the counterclockwise direction, and those skilled in the art can determine the arrangement mode of the material pushing plates according to the vibration direction of the grains generated by the rotation of the dual-shaft motor 111 to complete the sieving and discharging of the grains.

It should be noted that, in the case of no conflict, the features in the following embodiments and examples may be combined with each other; moreover, all other embodiments that can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort fall within the scope of the present disclosure.

It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (20)

1. A grain impurity analyzer, comprising:

the screening mechanism (1) comprises a vibrating device (11) and a screening component (12) in transmission connection with the vibrating device (11), wherein the screening component (12) is driven by the vibrating device (11) to eccentrically vibrate so that grains to be analyzed in the screening component (12) vibrate along a preset direction, and the preset direction is at least two directions; the screen assembly (12) has a feed inlet, a first blanking port and a second blanking port (1223);

the first blanking port is communicated with a feeding port of the impurity weighing device, so that impurities screened by the screening mechanism (1) enter the impurity weighing device to be weighed;

net grain weighing device (4), second blanking mouth (1223) with the feed inlet of net grain weighing device (4) is linked together, so that the cereal that screening mechanism (1) sieves gets into net grain weighing device (4) are weighed.

2. The grain impurity analyzer of claim 1, wherein the vibration means (11) comprises:

a dual-shaft motor (111), the dual-shaft motor (111) being mounted to the sifting mechanism (1) by a connection disc (115), the dual-shaft motor (111) including a first output shaft (112) and a second output shaft (113);

a weight (114), the weight (114) being mounted to the first output shaft (112);

the eccentric mechanism is installed in the connecting disc (115) and comprises a connecting block (117) and an arc-shaped slide way (116) fixedly connected with the connecting block (117), the connecting block (117) is fixedly connected with the second output shaft (113), and a sliding block (118) is installed in the arc-shaped slide way (116) in a sliding mode;

the position of the slide block (118) on the arc-shaped slide way (116) is changed, so that the eccentric angle of the eccentric mechanism is a positive angle or a negative angle, and the sieving direction is clockwise or counterclockwise.

3. The grain impurity analyzer according to claim 2, wherein the vibration means (11) further comprises:

the connecting plate (119) is provided with a first opening, the balancing weight (114) is connected with the first output shaft (112) through the connecting plate (119), and the first output shaft (112) penetrates through the first opening;

a second opening is formed in the connecting block (117), the eccentric mechanism is connected with the second output shaft (113) through the connecting block (117), and the second output shaft (113) penetrates through the second opening.

4. The grain impurity analyzer of claim 2, wherein the sliding block (118) is provided with a ball bearing, the ball bearing is rotatably mounted on the sliding block (118) and is positioned on at least one contact surface of the sliding block (118) contacting the arc-shaped chute (116).

5. The grain impurity analyzer according to claim 4, wherein the contact surface of the slider (118) is provided with a mounting hole, and the ball is rotatably fitted in the mounting hole.

6. The grain impurity analyzer of claim 2, wherein the impurity weighing device comprises a large impurity weighing device (2) and a light impurity weighing device (3), the first blanking port comprises a large impurity blanking port (1213) and a light impurity blanking port (1231), the large impurity blanking port (1213) is communicated with the feeding port of the large impurity weighing device (2), and the light impurity blanking port (1231) is communicated with the feeding port of the light impurity weighing device (3).

7. The grain impurity analyzer of claim 6, wherein the screen assembly (12) includes:

the upper-layer screen (121) comprises a first screen (1211) positioned at the bottom and a first side wall (1212) positioned in the circumferential direction, the first screen (1211) and the first side wall (1212) enclose a sub-cavity of the upper-layer screen (121), and the large impurity blanking port (1213) is formed in the first side wall (1212);

the middle-layer screen (122), the middle-layer screen (122) comprises a second screen (1221) located at the bottom and a second side wall (1222) located in the circumferential direction, the second screen (1221) and the second side wall (1222) enclose a middle-layer screen (122) sub-cavity, the first screen (1211) is arranged between the upper-layer screen (121) sub-cavity and the middle-layer screen (122) sub-cavity, and the second blanking port (1223) is opened in the second side wall (1222);

lower layer feed bin (123), second screen cloth (1221) set up in middle level sieve (122) divide the chamber with between lower layer feed bin (123), light miscellaneous feed opening (1231) is seted up in the lateral wall of lower layer feed bin (123).

8. The grain impurity analyzer according to claim 7, wherein a first conical hopper (1214) is provided at a middle position of the first screen (1211), and the first conical hopper (1214) is upwardly protruded with respect to a screen surface of the first screen (1211); and/or the presence of a gas in the atmosphere,

a second cone (1224) is arranged in the middle of the second screen cloth (1221), and the second cone (1224) protrudes upwards relative to the screen surface of the second screen cloth (1221).

9. The grain impurity analyzer of claim 7, wherein the upper screen (121) further comprises:

a first material pushing plate (1215), the first material pushing plate (1215) is arranged in the sub-cavity of the upper layer screen (121), one end of the first material pushing plate (1215) is rotatably arranged at the inner side of the first side wall (1212) through a first hinge (1216), and the first material pushing plate (1215) can swing around the first hinge (1216).

10. The grain impurity analyzer of claim 9, wherein the upper screen (121) further comprises:

a first flap (1217), one end of the first flap (1217) being mounted to the inside of the first sidewall (1212) and blocking the first flap (1216); and/or the presence of a gas in the atmosphere,

and one end of the first discharging baffle plate (1218) is arranged on the inner side of the first side wall (1212) and shields the large impurity blanking port (1213).

11. The grain impurity analyzer of claim 7, wherein the intermediate screen (122) further comprises:

a second material pushing plate (1225), the second material pushing plate (1225) being disposed in the sub-cavity of the middle screen (122), one end of the second material pushing plate (1225) being rotatably mounted to the inner side of the second side wall (1222) via a second hinge (1226), the second material pushing plate (1225) being swingable around the second hinge (1226).

12. The grain impurity analyzer of claim 11, wherein the intermediate screen (122) further comprises:

a second flap (1227) having one end mounted to an inner side of the second sidewall (1222), and blocking the second flap (1226); and/or the presence of a gas in the atmosphere,

and a second discharging baffle (1228), wherein one end of the second discharging baffle (1228) is arranged on the inner side of the second side wall (1222) and shields the second blanking opening (1223).

13. The grain impurity analyzer according to claim 7, wherein a rapping structure is provided in the first screen (1211) and/or the second screen (1221).

14. The grain impurity analyzer according to any one of claims 6 to 13, wherein the large impurity weighing device (2) comprises:

a heavy impurity weighing scale;

the big impurity feeding channel (21), the big impurity feeding channel (21) is communicated with the big impurity blanking port (1213);

the big impurity blanking valve (22) is arranged in the big impurity feeding channel (21), and the big impurity blanking valve (22) opens or closes the big impurity feeding channel (21);

the large impurity weighing hopper (23) is arranged at the bottom end of the large impurity feeding channel (21) and communicated with the large impurity feeding channel (21), and the large impurity weighing hopper (23) is installed on the large impurity weighing scale.

15. The grain impurity analyzer of claim 14, wherein the large impurity weighing device (2) further comprises:

a large impurity receiving hopper (24), wherein the large impurity receiving hopper (24) is detachably arranged on a support frame (53) of the grain analyzer.

16. Grain impurity analyzer according to any of claims 6-13, characterized in that the light impurity weighing means (3) comprises:

weighing the light impurities;

the light impurity feeding channel (31), the light impurity feeding channel (31) is communicated with the light impurity blanking port (1231);

the light impurity blanking valve (32), the light impurity blanking valve (32) is arranged in the light impurity feeding channel (31), and opens or closes the light impurity feeding channel (31);

the light impurity weighing hopper (33) is arranged at the bottom end of the light impurity feeding channel (31) and communicated with the light impurity feeding channel (31), and the light impurity weighing hopper (33) is installed on the light impurity weighing scale.

17. The grain impurity analyzer of claim 16, wherein the light impurity weighing device (3) further comprises:

the light impurity receiving hopper (34), the light impurity receiving hopper (34) is detachably arranged on a support frame (53) of the grain analyzer.

18. The grain impurity analyzer of any one of claims 6 to 13, wherein the net grain weighing device (4) comprises:

a grain metering scale;

the grain feeding channel (41), the grain feeding channel (41) is communicated with the grain blanking port;

a grain blanking valve (42), wherein the grain blanking valve (42) is arranged in the grain feeding channel (41) and opens or closes the grain feeding channel (41);

cereal weighing hopper (43), cereal weighing hopper (43) set up in cereal feedstock channel (41)'s bottom to with cereal feedstock channel (41) are linked together, cereal weighing hopper (43) are installed on cereal weigher.

19. The grain impurity analyzer of claim 18, wherein the net grain weighing device (4) further comprises:

a light impurity separator (44), the light impurity separator (44) being disposed between the grain feed channel (41) and the grain blanking opening;

the light impurity separator (44) comprises a feeding hole, a baffle (451), an impurity removing hole (452) and an impurity removing discharging hole (453), wherein the impurity removing hole is communicated with the impurity removing negative pressure pipeline, and the baffle (451) is arranged between the feeding hole of the light impurity separator (44) and the impurity removing hole (452).

20. The grain impurity analyzer of claim 18, wherein the net grain weighing device (4) further comprises:

and the conveying negative pressure pipeline (45) is communicated with the grain blanking bin so as to suck grains in the grain receiving hopper into a downstream inspection platform.

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