CN208066760U - A kind of gravity screening machine for seed screening - Google Patents

Abstract

The utility model provides a gravity screening machine for seed screening, which includes a screening box, a screening system and a ventilation system; the screening system includes a screen, a spring group, a cylinder and a discharge assembly, and the ventilation system includes a fan , air guide assembly, air guide channel and air intake channel, the air guide channel is installed in the screening box through a mounting plate, and the mounting plate is located under the screening system, the air intake channel is connected with the screening box and passes through the screening box and The straight section of the air guide channel is connected, and the air guide assembly is installed at the bottom of the screening box and connected with the inner wall of the straight section of the air guide channel. Beneficial effects: 1) the iron impurities contained in the seeds can be removed; 2) the blower will not fail due to impurities entering the blower.

Description

A Gravity Screening Machine for Seed Screening

technical field

The utility model relates to the field of gravity screening machines, in particular to a gravity screening machine used for seed screening.

Background technique

In the production of seed industry, the shriveled unqualified seeds and other impurities, such as lighter impurities and iron impurities that are consistent with the size of the seeds, need to be removed before packaging. Generally, a gravity screening machine is used to remove shriveled seeds and other lighter impurities in the seeds, but the fan of the existing gravity screening machine is directly installed directly below the screen, and some heavier and smaller impurities are easy to fall into the fan and then The blower fails, and the existing gravity screening machine cannot remove the iron impurities in the seeds that are the same size as the seeds, which seriously affects the quality of the seeds.

Therefore it is necessary to provide a gravity screening machine that is not easy to cause fan failure and can remove iron impurities consistent with the size of the seeds in the seeds.

Utility model content

The utility model provides a gravity screening machine for seed screening, which solves the problems in the prior art that the fan of the gravity screening machine is prone to failure and cannot remove iron impurities in the seeds that are consistent with the size of the seeds.

In order to achieve the above object, the utility model adopts the following technical solutions:

A gravity screening machine for seed screening,

Including screening box, screening system and ventilation system; among them,

The top of the screening box is provided with an air outlet channel and communicates with the outside through the air outlet channel. The top of the screening box is also provided with a feed door, and the screening box is provided with a discharge port on one of the box walls;

The screening system includes two slide rails, a screen, a spring group, a cylinder and a discharge assembly. The two slide rails are installed in pairs on the two opposite inner walls of the screening box, and one of the slide rails is located at the lower edge of the discharge port, and the other is The installation height of the first slide rail is higher than the installation height of the slide rail at the discharge port; the two opposite sides of the screen are slid and installed on the two slide rails, and the other two sides of the screen pass through the spring group and the cylinder and the box without slide rails The two opposite inner walls are connected; the discharge assembly includes a discharge channel and a number of magnetic partitions. The discharge channel is installed at the discharge port outside the screening box, and the magnetic partition is installed in the discharge channel to separate the discharge channel into several. trough;

The ventilation system includes a fan, an air inlet channel, an air guide channel and an air guide assembly. The fan is arranged outside the screening box and communicates with the air guide channel arranged inside the screening box through the air inlet channel. The air guide The channel is vertically arranged and divided into a straight section for the vertical connection of the air inlet channel and a neck expansion section integrally connected to the top edge of the straight section. The bottom edge of the straight section is sealed and fixed on the bottom wall of the screening box. The expanded neck of the expanded neck section is aimed upwards at the screen, and the air guide assembly is arranged in the straight section of the air guide channel to guide the wind from the air inlet channel to the screening system.

In this technical solution, the sieve hole diameter set on the screen is smaller than the particle size of the seeds to be screened, so that the setting does not hinder the passage of the wind and the seeds will not pass through the screen and fall to the bottom of the screening box; the screen is not connected with the two slide rails. Both sides of the installation are provided with installation walls to connect each spring and cylinder respectively; the difference in installation height of the two slide rails causes the screen installed on it to have an inclination, and it is inclined to the discharge port. The purpose is to make the seeds on the screen move smoothly to the discharge port so that they can only leave the screening box from the discharge port; at the same time, the two slide rails can support the screen installed on it, and provide support for the screen. The motion is guided so that the screen can move back and forth under the push of the cylinder; when the cylinder pushes the screen forward, each spring in the spring group is in a compressed state, and the compressed spring can move toward the screen when the cylinder piston pulls the screen back. The mesh provides a thrust towards the piston of the cylinder to assist the cylinder to pull back the screen. At the same time, the setting of the spring group can also ensure that when the cylinder pushes and pulls the screen, the screen is in a more stable reciprocating state and will not be pushed too hard. As a result, the seeds on the sieve leave the sieve box too quickly, thus failing to achieve a good screening effect; the magnetic partition can absorb iron impurities, and when the seeds leave the sieve box pass through the chute, the contained Iron impurities will be absorbed by the magnetic partition; in particular, there is also a slope in the discharge channel, and it is inclined away from the discharge port, so that the seeds leaving the screening box can pass through the chute smoothly; among them , the inclination of the screen and the inclination of the discharge channel are both greater than 5° and less than 10°. Such an inclination can ensure that the speed of the seeds passing through the screen or the discharge channel will not be too fast or too slow; the four sides of the installation plate They are respectively connected to the four side walls of the screening box, and the mounting plate is provided with a circular mounting hole for the installation of the expansion neck of the air guide channel; the expansion neck of the air guide channel is set towards the screen to facilitate leakage from the screen. The heavy impurities under the air can smoothly slide down to the bottom of the screening box along the inclined wall of the air guide channel, so as to be stored in the straight section of the air guide channel, and will not enter the inside of the fan through the air inlet channel; the air guide system can blow out the fan The wind in the horizontal direction changes to the wind in the vertical direction.

Compared with the prior art, the utility model has the following beneficial effects:

1) It can remove the iron impurities contained in the seeds;

2) The fan will not fail due to impurities entering the fan.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Figure 2 is a schematic diagram of the internal mechanism of the gravity screening machine;

Fig. 3 is the sectional view of A-A direction in Fig. 1;

Figure 4 is a sectional view of the installation of the magnetic partition.

The reference signs in the accompanying drawings of the description include: screening box 100, air outlet channel 110, feed door 120, screen 210, slide rail 211, installation wall 212, spring 221, cylinder 230, outlet channel 241, magnetic partition Plate 242 , fan 310 , air guide channel 320 , mounting plate 321 , air inlet channel 330 , first air guide plate 341 , second air guide plate 342 , third air guide plate 343 , fourth air guide plate 344 .

Detailed ways

As shown in Figures 1 to 4, the present embodiment proposes a gravity screening machine for seed screening, including a screening box 100, a screening system and a ventilation system; wherein,

The top of the screening box 100 is provided with an air outlet channel 110 and communicates with the outside world through the air outlet channel 110. The top of the screening box 100 is also provided with a feed door 120, and the screening box 100 is provided with a discharge port on one of the box walls. mouth;

Described screening system comprises two slide rails 211, screen cloth 210, spring 221 groups, cylinder 230 and discharge assembly, two slide rails 211 are installed in pairs on the two opposite inner walls of screening box body 100, and wherein one slide rail 211 is positioned at the discharge assembly. At the lower edge of the material opening, the installation height of another slide rail 211 is higher than that of the slide rail 211 at the discharge opening; the two opposite sides of the screen 210 are slidingly installed on the two slide rails 211, and the other two sides of the screen 210 The spring 221 group and the cylinder 230 are connected to the two opposite inner walls of the box body where the slide rail 211 is not installed; the discharge assembly includes a discharge channel 241 and a number of magnetic partitions 242, and the discharge channel 241 is installed at the outlet of the screening box 100 , the magnetic separator 242 is installed in the discharge channel 241 to separate the discharge channel 241 into several hoppers;

The ventilation system includes a fan 310, an air inlet channel 330, an air guide channel 320 and an air guide assembly. The channel 320 communicates, and the air guide channel 320 is vertically arranged and divided into a straight section for the vertical connection of the air inlet channel 330 and a neck expansion section integrally connected to the top side edge of the straight section, and the bottom edge of the straight section is sealed It is fixed on the bottom wall of the screening box 100, and the neck opening of the expanded neck section faces upwards to align with the screen 210, and the air guide assembly is arranged in the straight section of the air guide channel 320 so that the Wind-guided screening system.

In the above-described embodiment, the sieve aperture that is set on the screen cloth 210 is smaller than the seed particle size to be screened, so that the setting does not hinder the passing of the wind and the seeds can not pass through the screen cloth 210 and fall to the bottom of the screening box 100; the screen cloth 210 The two sides that are not installed with the two slide rails 211 are provided with installation walls 212 to connect each spring 221 and the cylinder 230 respectively; the difference in installation height of the two slide rails 211 results in the inclination of the screen 210 installed thereon , and inclined towards the discharge port, so that the seeds on the screen 210 can move smoothly to the discharge port to leave the screening box 100 from the discharge port; at the same time, the two slide rails 211 can The screen cloth 210 installed on it is supported, and the screen cloth 210 is provided with motion guide so that the screen cloth 210 can realize reciprocating movement under the promotion of the cylinder 230; when the cylinder 230 pushed the screen cloth 210 forward, the spring 221 set The spring 221 is in a compressed state, and the compressed spring 221 can provide a thrust towards the cylinder 230 piston direction to the screen 210 when the cylinder 230 piston pulls back the screen 210, so as to assist the cylinder 230 to pull the screen 210 back. At the same time, the spring The setting of group 221 can also ensure that when the cylinder 230 pushes and pulls the sieve 210, the sieve 210 is in a more stable reciprocating state, so that the seeds on the sieve 210 leave the sieve 210 casing too quickly, so as not to push and pull too hard. And then can not reach good screening effect; magnetic partition 242 can adsorb iron impurities, when the seeds leaving the screening box 100 pass through the hopper, the iron impurities contained therein will be adsorbed by the magnetic partition 242; In particular, there is also an inclination in the discharge channel 241, and it is inclined to a direction away from the discharge port, so that the seeds leaving the screening box 100 can pass through the chute smoothly; wherein, the inclination of the screen 210 and the discharge The inclination of material passage 241 is greater than 5°, and less than 10°, such inclination can ensure that the speed of seeds passing through screen cloth 210 or discharge passage 241 will not be too fast or too slow; the four sides of mounting plate 321 are respectively connected to On the four side walls of the screening box 100, and on the mounting plate 321, a circular mounting hole is provided for the installation of the expansion neck of the air guide channel 320; the expansion neck of the air guide channel 320 is set towards the screen cloth 210, so that The heavier impurities leaked by 210 can smoothly slide down along the inclined wall of the air guide channel 320 to the bottom of the screening box 100, so as to be stored in the straight section of the air guide channel 320, and will not enter the inside of the fan 310 through the air inlet channel 330; The wind guiding system can change the wind in the horizontal direction blown by the fan 310 into the wind in the vertical direction.

Preferably, the set of springs 221 includes at least two springs 221 . In order to prevent the end of the screen 210 connected to the spring 221 from tilting, at least two springs 221 are needed to ensure its balance.

Preferably, the wind deflector assembly includes a first wind deflector 341, a second wind deflector 342, a third wind deflector 343 and a fourth wind deflector 344; wherein, the first wind deflector 341, the second wind deflector The plate 342, the third air guide plate 343 and the fourth air guide plate 344 are installed on the air outlet path of the fan 310 and the distance from the air inlet channel 330 increases step by step; the first air guide plate 341 is under the air outlet of the air inlet channel 330 Along the top, the fourth wind deflector 344 is on the top of the air outlet of the air inlet channel 330 . Wherein, such setting is to change the direction of all the wind from the air inlet channel 330 to move towards the screen 210 and cover the screen 210 with the largest area.

Preferably, chamfered parts are provided at the ends of the first wind deflector 341 , the second wind deflector 342 , the third wind deflector 343 and the fourth wind deflector 344 extending from the widening section of the air guide channel 320 . Wherein, such setting can ensure that the first wind deflector 341, the second wind deflector 342, the third wind deflector 343 and the fourth wind deflector 344 will guide the wind from the air inlet channel 330 to the direction of the screen 210 smoothly without It will be directed to the bottom of the screening box 100.

The working principle of this embodiment:

When the seeds need to be screened by gravity, open the feed door 120 and load the seeds to be screened, close the feed door 120, start the fan 310 and the cylinder 230, and the seeds to be screened will swing in an S shape on the screen 210 and move toward the discharge port. Move, during the moving process, the blower fan 310 blows up the lighter dry seeds and other lighter impurities and leaves the gravity screening machine through the air outlet channel 110, and the impurities that are heavier and have an aperture smaller than the sieve holes pass through the sieve holes to Fall down to the bottom of the screening box 100, and the ferrous impurities with a particle size larger than the sieve aperture will enter the discharge channel 241 from the discharge port along with the seeds. When passing through each lower chute, the ferrous impurities are magnetically separated The plates 242 absorb and are removed from the seeds, and the screened seeds leave the gravity screener from each chute.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the purpose and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.

Claims (4)

1. a kind of gravity screening machine that is used for seed screening is characterized in that, comprises screening casing, screening system and ventilating system; Wherein, The top of the screening box is provided with an air outlet channel and communicates with the outside through the air outlet channel. The top of the screening box is also provided with a feed door, and the screening box is provided with a discharge port on one of the box walls; The screening system includes two slide rails, a screen, a spring group, a cylinder and a discharge assembly. The two slide rails are installed in pairs on the two opposite inner walls of the screening box, and one of the slide rails is located at the lower edge of the discharge port, and the other is The installation height of the first slide rail is higher than the installation height of the slide rail at the discharge port; the two opposite sides of the screen are slid and installed on the two slide rails, and the other two sides of the screen pass through the spring group and the cylinder and the box without slide rails The two opposite inner walls are connected; the discharge assembly includes a discharge channel and a number of magnetic partitions. The discharge channel is installed at the discharge port outside the screening box, and the magnetic partition is installed in the discharge channel to separate the discharge channel into several. trough; The ventilation system includes a fan, an air inlet channel, an air guide channel and an air guide assembly. The fan is arranged outside the screening box and communicates with the air guide channel arranged inside the screening box through the air inlet channel. The air guide The channel is vertically arranged and divided into a straight section for the vertical connection of the air inlet channel and a neck expansion section integrally connected to the top edge of the straight section. The bottom edge of the straight section is sealed and fixed on the bottom wall of the screening box. The expanded neck of the expanded neck section is aimed upwards at the screen, and the air guide assembly is arranged in the straight section of the air guide channel to guide the wind from the air inlet channel to the screening system. 2. A kind of gravity screening machine that is used for seed screening as claimed in claim 1, is characterized in that, described spring group comprises two springs at least. 3. A kind of gravity screening machine that is used for seed screening as claimed in claim 1, is characterized in that, described wind deflector assembly comprises first wind deflector, second wind deflector, the 3rd wind deflector and the fourth wind deflector. Wind deflector; wherein, the first wind deflector, the second wind deflector, the third wind deflector and the fourth wind deflector are installed on the air outlet path of the fan and the distance from the air inlet channel increases step by step; and the first The air guide plate is above the lower edge of the air outlet of the air inlet channel, and the fourth air guide plate is above the upper edge of the air outlet of the air inlet channel. 4. a kind of gravity screening machine that is used for seed screening as claimed in claim 3, is characterized in that, described first wind deflector, second wind deflector, the 3rd wind deflector and the 4th wind deflector guide A chamfered portion is provided at the extended end of the expanded neck section of the air channel.