CN214160422U - Material sieve body and rice sieve - Google Patents

Abstract

The utility model discloses a material screen frame and rice sieve, including framework and screening mechanism, screening mechanism locates in the inner chamber of framework in order to sieve the material according to the particle diameter of material, the framework is three-dimensional square structure, at least one side of framework is equipped with exhaust mechanism, at least one side of framework is equipped with return air mechanism, return air mechanism and exhaust mechanism are in respectively that the different sides of framework make progress and cooperate with the framework in order to enclose the side of framework and keep off and then prevent that screening mechanism during operation material is to the framework outsourcing, through exhaust mechanism and return air mechanism combined action, form the air current that flows in and follow exhaust mechanism from return air mechanism in the framework, so that the heat in the framework discharges to the outside of framework along with the flow of air current, thereby reduce the temperature of the inner chamber of framework. The utility model discloses a material screen frame is favorable to reducing the difference in temperature between the outside of the inner chamber of framework and framework, has avoided the material in the framework to make the problem of material crusting because the inside and outside difference in temperature is too big and the production steam that leads to.

Description

Material sieve body and rice sieve

Technical Field

The utility model relates to a mechanical equipment technical field especially relates to a material screen frame. The utility model discloses still relate to a rice sieve.

Background

The rice sieve is used for classifying the white rice and is generally used for a subsequent rice milling or polishing process, the temperature of the rice can rise to a certain extent after the rice passes through the rice milling and polishing processes, and the surface layer of the rice can be provided with certain rice bran. And after the rice enters the rice sieve, because the inside and outside difference in temperature of the sieve body can form steam, the rice bran can form the rice bran caking phenomenon when meeting steam, cause the sieve block hole and the wallboard bran powder to bond, especially in winter the inside and outside difference in temperature of the sieve body is bigger, the caking phenomenon can seriously influence the normal operation of the machine.

The principle of screening and grading the white rice aims at different sizes and sizes of the rice, and the rice is effectively graded by utilizing a plurality of layers of sieve plates with corresponding sizes. The sieve body is generally provided with 4-6 layers of sieve plates, materials flow on the sieve plates, materials smaller than the sieve mesh size pass through the sieve plates to reach the lower-layer sieve plates, and materials larger than the sieve mesh size are remained on the sieve plates and collected, so that effective classification is achieved.

The current white rice sieve, in order to prevent that the interior material of screen frame during operation screen frame from splashing the screen frame, the screen frame adopts closed structure usually, because structural limitation, can't accomplish to open and ventilate, the inside and outside air current mobility of screen frame is poor, the internal temperature height of screen, the inside and outside difference in temperature of screen frame is big to it is serious to lead to the interior rice bran caking phenomenon of screen frame.

SUMMERY OF THE UTILITY MODEL

The utility model provides a material screen frame to solve current screen frame because the limitation of structure itself, the inside and outside air current mobility of screen frame is poor, leads to the difficult discharge of heat in the screen frame, and the inside and outside difference in temperature of screen frame leads to the easy technical problem who binds the chaff of the grain of rice in the screen frame greatly.

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

a material screen body comprises a frame body and a screening mechanism, wherein the screening mechanism is arranged in an inner cavity of the frame body to screen materials according to the particle size of the materials, the frame body is of a three-dimensional square structure, at least one side of the frame body is provided with an exhaust mechanism which enables the inner cavity of the frame body to be communicated with the outer side of the frame body so as to lead air flow in the frame body out of the frame body, at least one side of the frame body is provided with an air return mechanism which enables the inner cavity of the frame body to be communicated with the outer side of the frame body so as to supplement the air flow out of the frame body into the frame body, the air return mechanism and the exhaust mechanism are respectively positioned on different sides of the frame body upwards and are matched with the frame body so as to enclose and block the side surface of the frame body and further prevent the materials from splashing out of the frame body when the screening mechanism works, and the air flow which flows in from the air return mechanism and flows out of the exhaust mechanism to the outer side of the frame body along with the flow of the air flow when the screening mechanism screens the materials, thereby reducing the temperature of the interior chamber of the frame.

Furthermore, the air exhaust side of the frame body is provided with a first opening, the air exhaust mechanism comprises a side baffle plate and a wind baffle plate, the side baffle plate is arranged on the first opening of the frame body in a covering mode, the wind baffle plate is arranged on the side baffle plate, a lateral air exhaust channel with an air outlet in the upper portion is formed by enclosing between the wind baffle plate and the side baffle plate, an air exhaust groove used for enabling the inner cavity of the frame body to be communicated with the lateral air exhaust channel is formed in the side baffle plate, and then air flow in the frame body flows into the lateral air exhaust channel through the air exhaust groove and is exhausted out of the frame body from the air outlet of the lateral air exhaust channel.

Further, exhaust mechanism still includes the guide board that is in the side direction passageway of airing exhaust, and the first side and the side shield fixed connection of guide board, the second side of guide board extend and incline up towards the framework is external to upwards draw out and prevent that the material from the side direction of airing exhaust of framework outwards spill outside the screening mechanism during operation through the air current of groove discharge to the side direction passageway of airing exhaust.

Further, the quantity of exhaust groove is a plurality of, a plurality of exhaust grooves are arranged along vertical interval, the guide board is laid with exhaust groove and one-to-one, exhaust mechanism is still including locating the flow distribution plate in the side direction passageway of airing exhaust, the flow distribution plate is used for separating the side direction passageway of airing exhaust into two air current channels that communicate with the air exit respectively, one of them air current channel's income wind gap and all air current channels intercommunication of framework lower part, another air current channel and all air current channels intercommunication of airing exhaust on framework upper portion, and then make the air current of all exhaust groove circulations of framework downside and the air current of all exhaust groove circulations of upside separate in different air current channels and discharge from same air exit, the flow distribution plate is located the guide board and is kept away from one side of side shield.

Furthermore, the exhaust mechanism also comprises an exhaust pipe communicated with the exhaust port and a negative pressure air suction device used for discharging air flow in the exhaust pipe, and the exhaust pipe is vertically arranged at the top of the frame body.

Furthermore, a second opening is arranged on the first air return side of the frame body, the air return mechanism comprises a front air return frame which is covered on the second opening of the frame body, the front air return frame is of a double-layer plate structure, an air supply channel which is used for communicating the outer side of the frame body with the inner cavity of the frame body is arranged on the front air return frame, the air supply channel comprises an air supply groove which is arranged on the inner side wall of the front air return frame and is communicated with the inner cavity of the frame body, an air supply hole which is arranged on the outer side wall of the front air return frame and is communicated with the air supply groove and the air supply hole, the air supply hole is arranged on the upper side of the air supply groove so that airflow flowing in from the outer side of the frame body is bent downwards under the guide of the communication hole and then flows into the frame body, and the material in the frame body is prevented from being splashed out from the first air return side of the frame body when the screening mechanism works, the front air return frame is hinged on the frame body, the back return air frame is detachably connected with the frame body.

Furthermore, a third opening is formed in the second air return side of the frame body, the air return mechanism comprises a rear air return frame which is covered on the third opening of the frame body, the rear air return frame is of a double-layer plate structure, an air guide channel which is used for communicating the outer side of the frame body with the inner cavity of the frame body is arranged on the rear air return frame, and the air inlet end of the air guide channel is arranged in an upward inclining mode towards the outer side of the frame body so as to prevent materials in the frame body from being splashed out from the second air return side of the frame body when the air flow outside the frame body flows into the inner cavity of the frame body through the air guide channel.

Further, screening mechanism includes material guide board and the material screening layer of laying from last to lower interval in the direction of height of framework, and the material screening layer is set up by the direction of the first return air side of framework towards the second return air side, and the oversize thing output side on material screening layer is laid to the decline, and two adjacent material screening layers in a plurality of material screening layers adopt the same mesh aperture and carry out the pay-off by same material guide board in order to form parallelly connected screening subassembly structure.

Further, the upside of parallelly connected screening subassembly structure is located to the material guide board, the material guide board is set up towards the direction of second return air side by the first return air side of framework, and the output side of material guide board lays to decline, the output side of material guide board is located to preceding return air frame, the air supply groove includes the first air supply baffle box of arranging along the width direction interval of return air mechanism, be equipped with second air supply baffle box between two adjacent first air supply baffle boxes, the input port of first air supply baffle box and the output of material guide board communicate, the delivery outlet of first air supply baffle box and the input of the upper material screening layer of parallelly connected material screening layer correspond the setting in order to lead the material that the material guide board exported to the upper material screening layer, the input port of second air supply baffle box and the output of material guide board communicate, the output port of second air supply baffle box corresponds the setting with the input of the lower material screening layer of parallelly connected material screening layer in order to export the material guide board The material is guided to the lower material screening layer, and then the material of the material guide plate is simultaneously conveyed to the parallel screening component structure under the guide of the first air supply guide groove and the second air supply guide groove.

The utility model also provides a rice sieve, including foretell material screen frame with be used for driving the material screen frame vibration with the actuating mechanism that sieves the rice to the material screen frame in.

The utility model discloses following beneficial effect has:

the utility model discloses a material screen frame, including framework, screening mechanism, exhaust mechanism and return air mechanism. The screening mechanism vibrates along with the frame body to enable the materials to flow on the screening mechanism and roll in a reciprocating mode so as to screen and collect the materials with different particle sizes on the screening mechanism, and therefore effective grading of the materials is achieved. The air return mechanism and the air exhaust mechanism are respectively positioned on different sides of the frame body, upwards and are matched with the frame body to enclose and block the side face of the frame body so as to prevent materials from splashing out of the frame body when the screening mechanism works, and the normal work of the screen body can be effectively guaranteed. The air exhaust mechanism and the air return mechanism are arranged on different sides of the frame body upwards, the air flow in the inner cavity of the frame body is exhausted through the air exhaust side provided with the air exhaust mechanism, meanwhile, the problem that materials are sucked out due to overlarge negative pressure in the inner cavity of the frame body can be effectively prevented by supplying the air flow from the air return side provided with the air return mechanism, furthermore, as the inflow direction and the outflow direction of the air flow are arranged on different sides of the frame body upwards, the air flow flows in from the air return side of the frame body and is exhausted from the air exhaust side of the frame body after passing through the screen mesh of the screening mechanism, the flow area and the flow time of the air flow flowing in the frame body from the outer side are effectively increased, further, heat in the frame body is exhausted to the outer side of the frame body along with the air flow, the temperature difference between the inner cavity of the frame body and the outer side of the frame body is reduced, and a series of problems that materials are bran-bonded due to water vapor generated due to overlarge temperature difference between the materials in the inner temperature and the outer temperature difference of the materials in the frame body are avoided.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

fig. 1 is a schematic structural view of a material screen body according to a preferred embodiment of the present invention;

FIG. 2 is a schematic side view of a material screen according to a preferred embodiment of the present invention;

FIG. 3 is an exploded view of the material screen of the preferred embodiment of the present invention;

FIG. 4 is a front view of the material screen of the preferred embodiment of the present invention;

FIG. 5 is a rear view of the material screen of the preferred embodiment of the present invention;

fig. 6 is a process flow diagram of the material screen body according to the preferred embodiment of the present invention.

Illustration of the drawings:

100. a material screen body; 10. a frame body; 20. a screening mechanism; 21. a material guide plate; 22. material screening and layering; 30. an air exhaust mechanism; 31. a side dam; 32. a wind deflector; 33. a lateral air exhaust channel; 34. a guide plate; 35. a flow distribution plate; 36. an exhaust duct; 41. a front return frame; 411. an air supply channel; 4111. a wind feeding groove; 4112. an air supply hole; 4113. a communicating hole; 42. a rear air return frame; 421. and (4) an air guide channel.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered below.

Fig. 1 is a schematic structural view of a material screen body according to a preferred embodiment of the present invention; FIG. 2 is a schematic side view of a material screen according to a preferred embodiment of the present invention; FIG. 3 is an exploded view of the material screen of the preferred embodiment of the present invention; FIG. 4 is a front view of the material screen of the preferred embodiment of the present invention; FIG. 5 is a rear view of the material screen of the preferred embodiment of the present invention; fig. 6 is a process flow diagram of the material screen body according to the preferred embodiment of the present invention. Wherein the arrows in fig. 1, 2, 4 and 5 indicate the direction of the air flow and the arrows in fig. 6 indicate the direction of the material flow.

As shown in fig. 1, 2, 3, 4 and 5, a material sieving mechanism 100 according to a preferred embodiment of the present invention includes a frame 10 and a sieving mechanism 20, the sieving mechanism 20 is disposed in an inner cavity of the frame 10 to sieve the material according to the particle size of the material, the frame 10 has a cubic structure, at least one side of the frame 10 is provided with an air exhausting mechanism 30 for communicating the inner cavity of the frame 10 with an outer side of the frame 10 to draw the air flow inside the frame 10 out of the frame 10, at least one side of the frame 10 is provided with an air returning mechanism for communicating the inner cavity of the frame 10 with the outer side of the frame 10 to feed the air flow outside the frame 10 into the frame 10, the air returning mechanism and the air exhausting mechanism 30 are respectively located at different sides of the frame 10 upward and cooperate with the frame 10 to enclose the side of the frame 10 and prevent the material from splashing out of the frame 10 when the sieving mechanism 20 is operated, when the sieving mechanism 20 sieves the material, when the material screening of the frame 10 is realized by the cooperation of the air exhausting mechanism 30 and the air returning mechanism, the air flow which flows in from the air returning mechanism and flows out from the air exhausting mechanism 30 is formed in the frame 10, so that the heat in the frame 10 is discharged to the outer side of the frame 10 along with the flow of the air flow, and the temperature of the inner cavity of the frame 10 is reduced.

The utility model provides a material screen frame 100, including framework 10, screening mechanism 20, exhaust mechanism 30 and return air mechanism. The screening mechanism 20 vibrates along with the frame 10 to enable the materials to flow and roll on the screening mechanism 20 in a reciprocating manner, so that the materials with different particle sizes on the screening mechanism 20 are screened and collected, and therefore effective grading of the materials is achieved. The air return mechanism and the air exhaust mechanism 30 are respectively located on different sides of the frame body 10 and face upward and are matched with the frame body 10 to enclose and block the side face of the frame body 10 so as to prevent materials from splashing out of the frame body 10 when the screening mechanism 20 works, and the normal work of the screen body can be effectively ensured. The air exhaust mechanism 30 and the air return mechanism are arranged at different sides of the frame body 10 upwards, and when the air flow in the inner cavity of the frame body 10 is exhausted through the air exhaust side provided with the air exhaust mechanism 30, the problem that the material is sucked out due to overlarge negative pressure in the inner cavity of the frame body 10 can be effectively prevented by supplying air flow from the air return side provided with the air return mechanism, because the inflow direction and the outflow direction of the air flow are on different sides of the frame body 10, the air flow flows in from the air return side of the frame body 10, passes through the screen of the screening mechanism 20 and then is discharged from the air exhaust side of the frame body 10, the flow area and the flow time of the air flow flowing in from the outer side of the frame body 10 in the frame body 10 are effectively increased, and then the heat in the frame body 10 is discharged to the outer side of the frame body 10 along with the flowing of the air flow, so that the temperature difference between the inner cavity of the frame body 10 and the outer side of the frame body 10 is reduced, and a series of problems that the materials in the frame body 10 are subjected to bran bonding and the like due to the generation of water vapor caused by the overlarge temperature difference between the inside and the outside of the materials are avoided.

It can be understood that the frame 10 is a square structure, the material enters the screening mechanism 20 from the top of the frame 10 for screening, and oversize materials of different screen layers flow into different material collecting pipelines from the rear side of the screen body.

Alternatively, the air exhaust mechanism 30 and the air return mechanism may be disposed on opposite lateral sides of the frame 10, or the air exhaust mechanism 30 and the air return mechanism may be disposed on adjacent lateral sides of the frame 10, as long as the air exhaust mechanism 30 and the air return mechanism are located on different sides of the frame 10, and the air intake side and the air exhaust side of the frame 10 are not located on the same side. Specifically, in this embodiment, four sides of the frame 10 are provided with openings, the left side and the right side of the frame 10 are provided with the air exhaust mechanisms 30, the front side and the rear side of the frame 10 are provided with the air return mechanisms, and the screened material on the screening mechanism 20 is collected from the rear side of the frame. In order to prevent the material on the screening mechanism 20 from splashing out through the air return mechanism, the flow channel of the airflow on the air return mechanism is a curved flow channel or a flow channel inclined upwards along the inner side of the frame 10 towards the outer side.

Further, referring to fig. 2, the exhaust side of the frame 10 is provided with a first opening, the exhaust mechanism 30 includes a side baffle 31 covering the first opening of the frame 10 and a wind baffle 32 provided on the side baffle 31, a side exhaust channel 33 having an exhaust opening at the upper portion is formed by enclosing between the wind baffle 32 and the side baffle 31, an exhaust groove for communicating the inner cavity of the frame 10 with the side exhaust channel 33 is provided on the side baffle 31, and further, the air flow in the frame 10 flows into the side exhaust channel 33 through the exhaust groove and is exhausted out of the frame 10 from the exhaust opening of the side exhaust channel 33. It is understood that the venting grooves may be rectangular grooves, or may be oblong grooves or other polygonal grooves. Specifically, in the present embodiment, in order to ensure the airflow flowing between each layer of the sieve layer on the screening mechanism 20 and simultaneously avoid the material on the sieve layer of the screening mechanism 20 from splashing out of the exhaust groove, the exhaust groove is arranged corresponding to each layer of the sieve layer of the screening mechanism 20, and each exhaust groove is arranged on the upper side of each layer of the sieve layer of the screening mechanism 20 to prevent the material on the sieve layer from splashing out of the exhaust groove along the horizontal direction, and a plurality of exhaust grooves are arranged along the vertical direction at intervals and share one lateral exhaust channel 33.

Further, in order to facilitate the airflow with heat to be discharged upwards along the vertical direction, the exhaust mechanism 30 further includes a guide plate 34 located in the lateral exhaust channel 33, a first side of the guide plate 34 is fixedly connected with the side baffle 31, and a second side of the guide plate 34 extends outwards towards the frame 10 and inclines upwards, so as to lead out the airflow discharged into the lateral exhaust channel 33 through the exhaust slot upwards and prevent the material from being splashed outwards from the exhaust side of the frame 10 when the screening mechanism 20 works. Specifically, in this embodiment, the guide plate 34 is a bent plate, the guide plate 34 includes a first plate and a second plate disposed at an angle to the first plate, the first plate is disposed on the side baffle 31 in an inclined manner, and the second plate is disposed in the lateral air exhaust channel 33 in the vertical direction, so as to guide the splashed material back to the screening mechanism 20, and further guide the air flow discharged from the air exhaust slot in the vertical direction and prevent the material from being splashed out from the air exhaust side of the frame 10 when the screening mechanism 20 operates.

Further, the number of exhaust grooves is a plurality of, a plurality of exhaust grooves are arranged along vertical interval, guide plate 34 and exhaust groove are laid with one-to-one correspondence, exhaust mechanism 30 is still including locating the flow distribution plate 35 in the side direction exhaust channel 33, flow distribution plate 35 is used for separating side direction exhaust channel 33 into two air current channels that communicate with the air exit respectively, the income wind gap of one of them air current channel communicates with all exhaust grooves of framework 10 lower part, another air current channel communicates with all exhaust grooves of framework 10 upper part, and then make all exhaust groove circulation's air current of framework 10 downside and all exhaust groove circulation's air current of upside separate in different air current channels and discharge from same air exit, flow distribution plate 35 locates one side that guide plate 34 keeps away from side shield 31. The lateral exhaust channel 33 is divided into two air flow channels by the splitter plate 35, so that the negative pressure suction force received by the exhaust groove at the lower part of the frame body 10 and the exhaust groove at the lower part of the frame body 10 can be respectively controlled.

More preferably, the guide plates 34 are disposed in one-to-one correspondence with the exhaust grooves, and the flow distribution plate 35 is disposed outside the guide plates 34 at an upper position of the frame body 10 for dividing the lateral exhaust passage into two air flow passages respectively communicating with the exhaust ports.

Further, the exhaust mechanism 30 further includes an exhaust duct 36 communicated with the exhaust port and a negative pressure suction device for exhausting the airflow in the exhaust duct 36, and the exhaust duct 36 is vertically disposed on the top of the frame 10. It can be understood that the negative pressure air suction device can be an air net air suction device, a negative pressure fan or other air suction devices.

Optionally, in this embodiment, the flow rate of the air flow in the frame 10 is controlled by controlling the power of the negative pressure air suction device, so as to prevent the air flow in the frame 10 from interfering with the material on the screening mechanism 20.

Preferably, a control valve for adjusting the negative pressure of the airflow channel is arranged in each airflow channel.

Further, referring to fig. 3, a second opening is disposed on the first air return side of the frame 10, the air return mechanism includes a front air return frame 41 covering the second opening of the frame 10, the front air return frame 41 is of a double-layer plate structure, an air supply channel 411 for communicating the outside of the frame 10 with the inner cavity of the frame 10 is disposed on the front air return frame 41, the air supply channel 411 includes an air supply groove 4111 disposed on the inner side wall of the front air return frame 41 and communicating with the inner cavity of the frame 10, an air supply hole 4112 disposed on the outer side wall of the front air return frame 41, and a communication hole 4113 for communicating the air supply groove 4111 with the air supply hole 4112, the air supply hole 4112 is disposed on the upper side of the air supply groove 4111 to enable the airflow flowing from the outside of the frame 10 to be bent downward and flow into the frame 10 under the guidance of the communication hole 4113, further, while the air flow outside the housing 10 is made to flow into the inner cavity of the housing 10 through the air blowing passage 411, the material in the frame 10 is prevented from splashing outwards from the first return air side of the frame 10 when the screening mechanism 20 is in operation. It will be appreciated that in this embodiment, the first return side is the front side of the frame, and since the screen layers of the screen mechanism are arranged in a direction from the front side to the rear side of the frame 10, and the oversize output end of the screen layer is inclined downwards, the materials on the screen mechanism are easy to spill from the front side and the rear side of the frame body 10, therefore, when air is blown from the front side of the screen body, the air flow outside the frame body 10 is fed into the inner cavity of the frame body 10 by the curved air blowing passage 411, and specifically, because the materials in the sieve layer can only be splashed out from the outer side of the sieve layer which is level or has a certain track, the air supply holes 4112 are arranged on the upper side of the air supply groove 4111 and communicated through the communication holes 4113, and the bottom of the air supply groove 4111 is arranged flush with each layer of sieve layer, so that the air supply hole 4112 is arranged at the upper side of the sieve layer, the air supply channel 411 is a curved flow channel, so that air flow is ensured, and meanwhile, materials are prevented from being splashed out from the position where the height of the sieve layer of the sieve mechanism is flush. Meanwhile, the bent flow channel is arranged, so that the flow velocity of the air flow is favorably reduced, and the influence on the materials on the screen body is avoided. Optionally, the air return mechanism includes a front air return frame 41 provided on the front wall of the frame body 10, and the front air return frame 41 is used to enclose the second opening.

Furthermore, a third opening is arranged on the second air return side of the frame 10, the air return mechanism comprises a rear air return frame 42 which is covered on the third opening of the frame 10, the rear air return frame 42 is of a double-layer plate structure, an air guide channel 421 which is used for communicating the outer side of the frame 10 with the inner cavity of the frame 10 is arranged on the rear air return frame 42, an air inlet end of the air guide channel 421 is arranged in an upward inclined manner towards the outer side of the frame 10, so that when the air flow outside the frame 10 flows into the inner cavity of the frame 10 through the air guide channel 421, the materials in the frame 10 are prevented from being splashed outwards from the second air return side of the frame 10 when the screening mechanism 20 works, the front air return frame 41 is hinged on the frame 10, and the rear air return frame 42 is detachably connected with the frame 10.

It is to be understood that, in the present embodiment, the second return air side is the rear side of the frame 10.

It can be understood that, in the present embodiment, the plurality of air supply channels 411 are arranged at intervals in the width direction of the frame 10 to form a row of air supply channel groups, the plurality of air supply channel groups are arranged at intervals in the height direction of the frame 10, the plurality of air guide channels 421 are arranged at intervals in the width direction of the frame 10 to form a row of air guide channel groups, and the plurality of air guide channel groups are arranged at intervals in the height direction of the width direction, so that the frame 10 performs large-area air supply. The front air return frame 41 is provided on the front side of the frame 10, the rear air return frame 42 is provided on the rear side of the frame 10, and the two air discharge mechanisms 30 are provided on the remaining two side walls of the frame 10, respectively.

Further, the screening mechanism 20 includes a material guide plate 21 and a material screening layer 22 arranged at intervals from top to bottom in the height direction of the frame 10, the material screening layer 22 is arranged from the first return air side of the frame 10 toward the second return air side, that is, the front side of the frame 10 is arranged toward the rear side, and the oversize material output side of the material screening layer 22 is arranged obliquely downward, and two adjacent material screening layers 22 in the plurality of material screening layers 22 adopt the same mesh aperture and are fed by the same material guide plate 21 to form a parallel screening assembly structure. Divide the material through setting up material guide board 21, make the material screening layer 22 feeding of material guide board 21 below even, carry out the guide through air feed groove 4111 on preceding return air frame 41, make parallelly connected material screening layer 22 feeding simultaneously of material guide board 21 below, be favorable to screening the material fast.

Further, the material guide plate 21 is disposed at the upper side of the parallel connection screening component structure, the material guide plate 21 is disposed from the first return side of the frame body 10 toward the direction of the second return side, the output side of the material guide plate 21 is disposed in a downward inclined manner, the output side of the material guide plate 21 is disposed on the front return frame 41, the air supply groove 4111 includes first air supply guide grooves arranged at intervals along the width direction of the return air mechanism, a second air supply guide groove is disposed between two adjacent first air supply guide grooves, the input port of the first air supply guide groove is communicated with the output end of the material guide plate 21, the output port of the first air supply guide groove is disposed corresponding to the input end of the upper material screening layer of the parallel connection material screening layer 22 so as to guide the material output by the material guide plate 21 onto the upper material screening layer, the input port of the second air supply guide groove is communicated with the output end of the material guide plate 21, the output port of the second air supply guide groove is communicated with the input end of the lower material screening layer of the parallel connection material screening layer 22 The corresponding setting is in order to lead the material that material guide plate 21 exported to the lower material sieve layer, and then make material guide plate 21's material carry to two layers of material sieve layers 22 parallelly connected simultaneously under the guide of first air supply baffle box and second air supply baffle box on material guide plate 21 locates the upside of parallelly connected screening subassembly structure, material guide plate 21 sets up towards the direction of second return air side along the first return air side of framework 10, and the output side of material guide plate 21 is laid to the slope down, preceding return air frame 41 is located the output side of material guide plate 21, air supply groove 4111 includes the first air supply baffle box of arranging along the width direction interval of return air mechanism, be equipped with second air supply baffle box between two adjacent first air supply baffle boxes, the input port of first air supply baffle box and the output end of material guide plate 21 intercommunication, the output port of first air supply baffle box and the input end of the upper material sieve layer of parallelly connected material sieve layer 22 correspond the setting in order to the material guide plate 21 output's material guide plate The material is guided to upper material screening layer, the input port of second air supply baffle box and the output end of material guide board 21 communicate, the output port of second air supply baffle box and the input of the lower material screening layer of parallelly connected material screening layer 22 correspond the setting in order to guide the material of material guide board 21 output to the lower material screening layer on, and then make the material of material guide board 21 carry to parallelly connected screening subassembly structural simultaneously under the guide of first air supply baffle box and second air supply baffle box.

Specifically, referring to fig. 6, an input port of the first air supply guide chute is communicated with an output side of the material guide plate 21, and an output port of the first air supply guide chute is communicated with an input side of the upper material sieving layer; the input port of the second air supply guide chute is communicated with the output side of the material guide plate 21, the output port of the first air supply guide chute is communicated to the input side of the lower material sieving layer, and then the materials on the material guide plate 21 are simultaneously conveyed to the upper and lower special-meter sieving layers through the first and second air supply guide chutes for sieving. The sum total value of the groove widths of the first air supply guide grooves is equal to the sum total value of the groove widths of all the second air supply guide grooves, so that the materials uniformly enter the upper material screening layer and the lower material screening layer.

It can be understood that, in the present embodiment, the direction of the ventilation air flow formed by the air returning mechanism is consistent with the conveying direction of the material, and the direction of the ventilation air flow formed by the air exhausting mechanism 30 is perpendicular to the conveying direction of the material, so as to avoid mutual interference; controlling the wind speed and flow rate of ventilation airflow by controlling the power of the negative pressure air suction device and a curved flow passage consisting of an air supply channel 4111 and a communicating hole 4113 of an air supply hole 4112 through an air supply channel; the dry-humidity detection and the temperature detection are carried out in the frame body 10, and the flow speed, the flow rate, other internal parameters or the temperature of the introduced air flow are correspondingly regulated and controlled according to the detection result so as to carry out closed-loop control on the material sieve body.

Preferably, in order to uniformly distribute the material on the material guide plate 21 on the lower material sieving layer of the upper material sieving layer connected in parallel, the width values of all the first air supply guide chutes are the same as the width values of all the second air supply guide chutes.

It can be understood that the lower side of the upper material screening layer is provided with a first screening guide plate for guiding out undersize of the upper material screening layer, and the lower side of the lower material screening layer is provided with a second screening guide plate for guiding out undersize of the lower material screening layer. More preferably, in order to facilitate the simultaneous introduction of undersize after screening parallel screening assembly structure into other sieve layers for further screening, the exhaust mechanism 30 further includes an output frame plate with a conveying cavity and arranged on one side of the lateral exhaust channel 33, an input port of the output frame plate is communicated with an output side of the first screening guide plate, an output port of the output frame plate is communicated to other sieve layers, and then undersize after screening parallel screening assembly structure is simultaneously input to the next sieve layer through the output frame plate, so as to perform the next screening. Specifically, undersize of the upper material screening layer is guided to the input port of the output frame plate through the first screening guide plate and is guided to the fourth screening layer through the output port of the output frame plate, and undersize of the lower material screening layer is guided to the fourth screening layer through the second screening guide plate.

Specifically, the utility model provides a material screen frame 100, material screen frame 100 is square cube structure, material screen frame 100 includes framework 10 and locates the screening mechanism 20 in framework 10, screening mechanism 20 includes from last to the material screening layer 22 that the interval was laid down at the direction of height of framework 10, the left side and the right side of screen frame are equipped with exhaust mechanism 30 respectively, the front side of screen frame is equipped with preceding return air frame 41, the rear side of screen frame is equipped with back return air frame 42, preceding return air frame 41, two exhaust mechanism 30 and back return air frame 42 enclose along framework 10's circumference and close the setting and keep off and then prevent that the outside spill of screen cloth mechanism during operation material with all side wall surfaces of framework 10.

It can be understood that the number of the exhaust mechanisms 30 is two, two exhaust mechanisms 30 are arranged at the rear side of the frame 10 along the height direction of the frame 10, the exhaust mechanisms 30 are fixedly connected with the rear side wall of the screen body through threads, the number of the front return frames 41 is two, two front return frames 41 are arranged at the front side of the frame 10 along the height direction of the frame 10, and in order to facilitate the internal condition of the frame 10 to be observed from the front side of the frame 10 and the screening mechanism 20 in the frame 10 to be pressed by the front return frames 41, the front return frames 41 are hinged at the front side of the frame 10; the number of the rear return air frames 42 is two, the two rear return air frames 42 are provided on the rear side of the frame body 10 in the height direction of the frame body 10, and the rear return air frames 42 are locked to the rear side of the frame body 10 by bolts.

In the preferred embodiment of the present invention, in order to ensure that the material on the material sieving layer 22 and the air flow outside the frame 10 flow from the front side of the frame 10 and prevent the material on the material sieving layer 22 from splashing out from the front side of the frame 10, a set of air supply channel group is provided at the position corresponding to each material sieving layer 22, wherein the air supply channel 411 in the air supply channel group is a curved channel, specifically, the air supply channel 411 comprises an air supply groove 4111 provided on the inner side wall of the front air return frame 41 and communicating with the inner cavity of the frame 10, an air supply hole 4112 provided on the outer side wall of the front air return frame 41 and a communicating hole 4113 for communicating the air supply groove 4111 and the air supply hole 4112, the air supply hole 4112 is provided at the upper side of the air supply groove 4111 so that the air flow flowing from the outside of the frame 10 is curved downward under the guidance of the communicating hole 4113 and flows into the inner cavity of the frame 10, and further, while the air flow outside the frame 10 flows into the inner cavity of the frame 10 through the air supply channel 411, prevent the materials in the frame 10 from spilling out when the screening mechanism 20 is in operation. When the material splashes from the front side of the frame 10, the material can only be splashed outwards from the surface of the material screening layer 22, at this time, the groove bottom surface of the air supply groove 4111 is arranged in parallel and level with the material screening layer 22, the communicating hole 4113 is arranged on the groove top surface of the air supply groove 4111, the air supply hole 4112 is communicated with the communicating hole 4113, and the material is prevented from splashing from the front side of the frame 10 after passing through the air supply hole 4112. Meanwhile, because the material guide plate 21 for guiding the undersize materials to feed again is arranged between the two adjacent material screening layers 22 of the screening mechanism 20, and the material guide plate 21 is inclined toward the front side along the rear side of the frame 10, each material sieving layer 22 is formed by feeding material from the front side of the frame 10, because the screening mechanism 20 of the utility model comprises two parallel material screening layers 22, the air supply groove 4111 not only facilitates ventilation but also has the function of guiding materials in order to facilitate simultaneous feeding, optionally, in order to ensure that the material sieving layer on the upper layer and the material sieving layer on the lower layer of the material sieving layer 22 connected in parallel can simultaneously convey undersize materials to the other layer, parallel material guiding plates are further arranged on the side wall of the frame body 10, the input end of the parallel guide plate is respectively communicated with the lower side of the upper material screening layer and the lower side of the lower material screening layer, and the output end of the parallel guide plate is communicated with the input end of the other material screening layer 22. Specifically, the air supply duct 4111 includes first air supply guide chutes arranged at intervals along the width direction of the air return mechanism, a second air supply guide chute is disposed between two adjacent first air supply guide chutes, an input port of the first air supply guide chute is communicated with an output end of the material guide plate 21, an output port of the first air supply guide chute is disposed corresponding to an input end of an upper material sieving layer of the parallel material sieving layer 22 to guide the material output from the material guide plate 21 to the upper material sieving layer, an input port of the second air supply guide chute is communicated with an output end of the material guide plate 21, an output port of the second air supply guide chute is disposed corresponding to an input end of a lower material sieving layer of the parallel material sieving layer 22 to guide the material output from the material guide plate 21 to the lower material sieving layer, and then the materials in the material guide plate 21 are simultaneously conveyed to the two material screening layers 22 connected in parallel under the guidance of the first air supply guide chute and the second air supply guide chute.

In the preferred embodiment of the present invention, in order to ensure that the airflow outside the material screening layer 22 and the frame body 10 flows from the rear side of the frame body 10, prevent the material on the material screening layer 22 from splashing from the rear side of the frame body 10, a set of air guide channel set is provided at the position corresponding to each layer of the material screening layer 22, wherein the air guide channel in the air guide channel set is vertically arranged, and the air inlet end of the air guide channel 421 inclines towards the outer side of the rear return air frame 42, specifically, because the rear side of the material screening layer 22 is the side where the material is collected on the screen, and the material vibrates little at the rear side of the material screening layer 22, therefore, only the air guide channel 421 inclined to the rear return air frame 42 needs to be provided, which has a simple structure and is convenient to use.

In the preferred embodiment of the present invention, in order to ensure that the material screening layer 22 and the air flow outside the frame body 10 flow from the left side and the right side of the frame body 10 and simultaneously prevent the material on the material screening layer 22 from splashing from the rear side of the frame body 10, at least one air exhaust groove is provided at the position corresponding to each material screening layer 22. Specifically, the tank bottom of the exhaust groove is flush with the upper surface of the material screening layer 22, a guide plate 34 for leading out the airflow entering the lateral exhaust channel 33 through the exhaust groove upwards is arranged on the side baffle 31, the first side of the guide plate 34 is fixedly connected with the side baffle 31, the second side of the guide plate 34 is obliquely arranged towards the outer side of the frame body 10 to block the material passing through the air guide groove from the side surface of the material screening layer 22, and the material can be prevented from being splashed out from the side surface of the frame body 10.

The utility model mainly adopts the ventilation mode of sucking air from the side surfaces of two sides of the frame body 10 and supplementing air for the front door plate and the rear door plate of the frame body 10, and takes the heat in the frame body 10 out of the frame body 10 through the air flow, thereby playing the cooling effect and avoiding the problem that the material is adsorbed because the negative pressure in the frame body 10 is too large; the side air suction can be uniformly distributed on each layer of sieve plate, and the front air return frame 41 and the rear air return frame 42 can effectively supplement air and prevent rice grains from splashing and jumping out from the front side and the rear side of the frame body 10. Wherein, preceding return air frame 41 and back return air frame 42 adopt steel pipe frame body 10 formula structure, form middle hollow layer, conveniently design the ventilation duct, can not only effectively increase the vent area, can effectively prevent again that the grain of rice that splashes from jumping out to be equipped with the circulation channel structure of parallelly connected material screening layer 22 on the preceding return air frame 41, can be effective, even with the upper strata screen down the material divide to parallelly connected two-layer material screening layer 22 on, select separately effectually.

The utility model also provides a rice sieve, including foretell material screen frame 100 with be used for driving the actuating mechanism that material screen frame 100 vibrates in order to carry out the screening to the rice in the material screen frame 100. It can be understood that in the present invention, the material sieving mechanism 100 performs a planar rotation motion under the action of the driving mechanism to sieve the material. The utility model discloses a rice sieve ventilation effect is good, can avoid the inside and outside difference in temperature of screen frame to form steam greatly effectively, causes the rice bran on grain of rice top layer to meet water vapour formation rice bran caking phenomenon, causes the technical problem that sieve stifled hole and wallboard bran powder bonded.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A material screen body comprises a frame body (10) and a screening mechanism (20), wherein the screening mechanism (20) is arranged in an inner cavity of the frame body (10) to screen materials according to the particle sizes of the materials,

the frame body (10) is of a three-dimensional square structure,

at least one side of the frame body (10) is provided with an exhaust mechanism (30) which leads the inner cavity of the frame body (10) to be communicated with the outer side of the frame body (10) so as to lead the air flow in the frame body (10) out of the frame body (10),

at least one side of the frame body (10) is provided with an air return mechanism which enables the inner cavity of the frame body (10) to be communicated with the outer side of the frame body (10) so as to supplement the air flow outside the frame body (10) into the frame body (10),

the air return mechanism and the air exhaust mechanism (30) are respectively arranged on different sides of the frame body (10) and are matched with the frame body (10) to enclose and shield the side surface of the frame body (10) so as to prevent materials from splashing out of the frame body (10) when the screening mechanism (20) works,

when the air exhaust mechanism (30) and the air return mechanism work together to realize that the screening mechanism (20) screens materials, air flow which flows in from the air return mechanism and flows out from the air exhaust mechanism (30) is formed in the frame body (10), so that heat in the frame body (10) is exhausted to the outer side of the frame body (10) along with the flowing of the air flow, and the temperature of the inner cavity of the frame body (10) is reduced,

the air exhaust side of the frame body (10) is provided with a first opening,

the air exhaust mechanism (30) comprises a side baffle (31) covered on the first opening of the frame body (10) and a wind shield (32) arranged on the side baffle (31), a lateral air exhaust channel (33) with an air exhaust opening at the upper part is formed by enclosing between the wind shield (32) and the side baffle (31),

and the side baffle (31) is provided with an air exhaust groove for communicating the inner cavity of the frame body (10) with the lateral air exhaust channel (33), so that the air flow in the frame body (10) flows into the lateral air exhaust channel (33) through the air exhaust groove and is exhausted out of the frame body (10) from an air exhaust port of the lateral air exhaust channel (33).

2. The material screen body of claim 1,

the exhaust mechanism (30) further comprises a guide plate (34) located in the lateral exhaust channel (33), a first side of the guide plate (34) is fixedly connected with the side baffle (31), and a second side of the guide plate (34) extends towards the frame body (10) and is inclined upwards so as to lead out airflow exhausted into the lateral exhaust channel (33) through the exhaust groove upwards and prevent materials from being splashed outwards from the exhaust side of the frame body (10) when the screening mechanism (20) works.

3. The material screen body of claim 2,

the number of the exhaust grooves is multiple, the exhaust grooves are vertically arranged at intervals, the guide plates (34) and the exhaust grooves are arranged in a one-to-one correspondence manner,

the exhaust mechanism (30) further comprises a splitter plate (35) arranged in the lateral exhaust channel (33), the splitter plate (35) is used for dividing the lateral exhaust channel (33) into two air flow channels respectively communicated with the exhaust port, one air inlet of the air flow channel is communicated with all the exhaust grooves at the lower part of the frame body (10), the other air flow channel is communicated with all the exhaust grooves at the upper part of the frame body (10), and then air flows circulated by all the exhaust grooves at the lower part of the frame body (10) and air flows circulated by all the exhaust grooves at the upper part of the frame body are separated in different air flow channels and exhausted from the same exhaust port,

the flow dividing plate (35) is arranged on one side, far away from the side baffle (31), of the guide plate (34).

4. The material screen body of claim 3,

the exhaust mechanism (30) also comprises an exhaust pipe (36) communicated with the exhaust port and a negative pressure air suction device used for exhausting the airflow in the exhaust pipe (36),

the exhaust pipe (36) is vertically arranged at the top of the frame body (10).

5. The material screen body of claim 1,

a second opening is arranged on the first return air side of the frame body (10),

the air return mechanism comprises a front air return frame (41) which is covered on a second opening of the frame body (10), the front air return frame (41) is of a double-layer plate structure, an air supply channel (411) which is used for communicating the outer side of the frame body (10) with the inner cavity of the frame body (10) is arranged on the front air return frame (41),

the air supply channel (411) comprises an air supply groove (4111) which is arranged on the inner side wall of the front air return frame (41) and is communicated with the inner cavity of the frame body (10), an air supply hole (4112) which is arranged on the outer side wall of the front air return frame (41) and a communication hole (4113) which is used for communicating the air supply groove (4111) and the air supply hole (4112),

the air supply hole (4112) is arranged on the upper side of the air supply groove (4111) so that airflow flowing from the outer side of the frame body (10) is guided by the communication hole (4113) to bend downwards and then flow into the frame body (10) backwards, and further, when the airflow outside the frame body (10) flows into the inner cavity of the frame body (10) through the air supply channel (411), materials in the frame body (10) are prevented from being splashed outwards from the first air return side of the frame body (10) when the screening mechanism (20) works.

6. The material screen body of claim 5,

a third opening is arranged on the second air return side of the frame body (10),

the air return mechanism comprises a rear air return frame (42) which is covered on a third opening of the frame body (10), the rear air return frame (42) is of a double-layer plate structure, an air guide channel (421) which is used for communicating the outer side of the frame body (10) with the inner cavity of the frame body (10) is arranged on the rear air return frame (42),

the air inlet end of the air guide channel (421) is arranged upwards and slantways towards the outer side of the frame body (10) so as to prevent the materials in the frame body (10) from splashing outwards from the second return air side of the frame body (10) when the screening mechanism (20) works while the airflow outside the frame body (10) flows into the inner cavity of the frame body (10) through the air guide channel (421),

the front air return frame (41) is hinged to the frame body (10), and the rear air return frame (42) is detachably connected with the frame body (10).

7. The material screen body of claim 6,

the screening mechanism (20) comprises a material guide plate (21) and material screening layers (22) which are arranged at intervals from top to bottom in the height direction of the frame body (10),

the material screening layer (22) is arranged from the first air return side of the frame body (10) to the second air return side, the oversize material output side of the material screening layer (22) is obliquely arranged downwards,

two adjacent material screening layers (22) in the plurality of material screening layers (22) adopt the same mesh aperture and are fed by the same material guide plate (21) to form a parallel screening component structure.

8. The material screen body of claim 7,

the material guide plate (21) is arranged on the upper side of the parallel screening component structure, the material guide plate (21) is arranged from the first return air side of the frame body (10) to the direction of the second return air side, the output side of the material guide plate (21) is obliquely arranged downwards,

the front air return frame (41) is arranged at the output side of the material guide plate (21), the air supply groove (4111) comprises first air supply guide grooves which are arranged at intervals along the width direction of the air return mechanism, a second air supply guide groove is arranged between every two adjacent first air supply guide grooves,

the input port of the first air supply guide chute is communicated with the output end of the material guide plate (21), the output port of the first air supply guide chute and the input end of the upper material screening layer of the material screening layer (22) which is connected in parallel are correspondingly arranged so as to guide the material output by the material guide plate (21) to the upper material screening layer,

the input port of second air supply baffle box with the output intercommunication of material guide board (21), the delivery outlet of second air supply baffle box with parallelly connected the input of the lower floor material screening layer of material screening layer (22) corresponds the setting in order to with the material direction of material guide board (21) output is to the lower floor material screening layer on, and then first air supply baffle box with make under the guide of second air supply baffle box the material of material guide board (21) is carried to parallelly connected screening subassembly simultaneously structurally.

9. A rice sieve, which is characterized in that,

comprising a material screen according to any one of claims 1 to 8 and a drive mechanism for driving the material screen into vibration to screen rice within the material screen.

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