Grain screening machine with adjustable screening hole diameter

Abstract

The utility model relates to the technical field of sieving machines, and discloses a grain sieving machine with adjustable sieve pore diameter, which comprises a fixed sieve frame with adjustable angle and capable of vibrating, and further comprises a movable sieve frame, a group of elastic reset pieces are arranged between the fixed sieve frame and the movable sieve frame, two winding rollers are rotatably connected to the inner wall of the movable sieve frame, the two winding rollers are linked through a first chain belt, and a second chain belt is arranged on the inner wall of the movable sieve frame. A first motor for driving the winding rollers to rotate is mounted on the fixed screen frame, a filter belt is wound between the two winding rollers, a group of filter screen areas are arranged on the surface of the filter belt, and filter holes are uniformly distributed in each filter screen area. Through the arrangement of the filter belt and the winding roller, the screening hole diameter of the screening machine can be rapidly adjusted, through the implementation of the reciprocating movement effect of the filter belt in the filtering operation and the matched arrangement of the vibration motor, double vibration of the filter belt in the vertical direction and the horizontal direction is achieved, and then the screening efficiency of the filter belt on grain materials is effectively improved through double vibration.

Description

Technical Field

[0001] This utility model relates to the field of screening machine technology, and more specifically, to a grain screening machine with adjustable screen aperture. Background Technology

[0002] During grain processing, grain screening is required.

[0003] In the prior art, patent document CN212550464U discloses a double-layer grain screening machine, including a fixed frame. A motor is fixedly installed at one end of the bottom of the inner cavity of the fixed frame, and a blower is fixedly installed at the other end of the bottom of the inner cavity of the fixed frame. A vibration triggering device is fixedly installed at one end of the middle of the inner cavity of the fixed frame. The above device achieves the effect of preventing material from getting stuck at the front end of the first layer screen through the upper and lower screens of the first layer. However, the above screening device is not convenient for rapid switching of screen aperture during screening, and it is not convenient for the screening device to achieve dual vibration in the vertical and horizontal directions and improve screening efficiency through dual vibration. In addition, the existing device is not convenient for reducing the clogging rate of the filter holes and the grain filtering efficiency by reciprocating the shape of the filter screen. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a grain screening machine with adjustable screen aperture. By setting up a filter belt and a roller, the screening aperture of this screening machine can be quickly adjusted. Through the reciprocating movement effect of the filter belt during filtration and the coordination of the vibrating motor, the filter belt can achieve dual vibration in both the vertical and horizontal directions. This dual vibration effectively improves the screening efficiency of the filter belt for grain materials.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a grain screening machine with adjustable sieve aperture, including an adjustable and vibrating fixed sieve frame, and further comprising:

[0006] A movable screen frame is provided, with a set of elastic reset members installed between the fixed screen frame and the movable screen frame. Two rollers are rotatably connected to the inner wall of the movable screen frame, and the two rollers are linked by a first chain belt. A first motor that drives the rollers to rotate is installed on the fixed screen frame. A filter belt is wound between the two rollers. A set of filter screen areas is provided on the surface of the filter belt. Filter holes are evenly distributed on each filter screen area, and the pore size of the filter holes on each filter screen area is different.

[0007] Two symmetrically arranged and fixed elastic tensioning members are provided on the moving screen frame, and both elastic tensioning members are in contact with the filter belt;

[0008] An eccentric tensioning block is rotatably connected to the moving screen frame and positioned directly below the filter belt;

[0009] The reciprocating transmission module is used for driving the movable screen frame to reciprocate along the axis direction of the winding roller.

[0010] As a preferred technical scheme of the utility model, the inner wall of the movable screen frame is rotationally connected with two transmission shafts, the output shaft end of the first motor is fixedly connected with one of the transmission shafts, the interiors of the two winding rollers are each provided with a first shaft slot, the two transmission shafts are respectively in sliding connection with the two shaft slots, and the cross sections of the transmission shafts and the shaft slots are all regular polygons.

[0011] As a preferred technical scheme of the utility model, the elastic tensioning member comprises a tensioning frame, the back surface of the tensioning frame is provided with a group of T-shaped guide rods, each T-shaped guide rod is in sliding connection with the movable screen frame, a compression spring is sleeved on each T-shaped guide rod and corresponds to the position between the movable screen frame and the tensioning frame, the inner wall of the tensioning frame is rotationally connected with a tensioning roller, and the tensioning roller is attached to the filter belt.

[0012] As a preferred technical scheme of the utility model, the utility model also comprises a base frame and a vibration frame, two groups of symmetrically arranged elastic damping members are installed between the base frame and the vibration frame, the vibration frame is hingedly connected with the fixed screen frame, two symmetrically arranged angle adjusting push rods are hingedly connected between the vibration frame and the fixed screen frame, a vibration motor is installed on the bottom surface of the vibration frame, and a screening material discharging box is installed on the vibration frame.

[0013] As a preferred technical scheme of the utility model, the utility model also comprises a discharging box installed on the vibration frame, a discharging roller driven by a discharging motor is rotationally connected between the inner surfaces of the discharging box, and a group of circumferentially arrayed discharging paddles are installed on the discharging roller.

[0014] As a preferred technical scheme of the utility model, the reciprocating transmission module comprises a gear shaft rotationally connected to the fixed screen frame, a group of half-face gears are installed on the gear shaft, the movable screen frame is in sliding connection with the fixed screen frame, a reciprocating gear plate is installed on the movable screen frame, each half-face gear is in transmission connection with the reciprocating gear plate, a second motor is installed on the fixed screen frame, the output shaft end of the second motor is fixedly connected with the gear shaft, a coupling shaft is rotationally connected to the fixed screen frame, umbrella gears are installed on the coupling shaft and the gear shaft, the two umbrella gears are in meshing engagement, a second shaft slot is formed in the interior of the eccentric tensioning block, a driving shaft is in sliding connection in the second shaft slot, the cross sections of the driving shaft and the second shaft slot are both regular polygons, and the coupling shaft is in transmission connection with the driving shaft through a second chain belt.

[0015] Compared with the prior art, the utility model has the beneficial effects as follows:

[0016] 1. The utility model discloses a filter belt and the setting of roll, can quickly adjust the screening aperture of this screening machine, realizes the effect of reciprocating movement and the cooperation setting of vibration motor when the filter belt filtering operation, thereby realizes the double vibration of filter belt vertical direction and horizontal direction, and then effectively improves the screening efficiency of filter belt to grain material.

[0017] 2. The utility model discloses the eccentric tensioning block circumferential motion when screening operation, and then changes the layout shape of filter belt and the inclination of filter hole on filter belt after the eccentric tensioning block circumferential motion, through the change of filter belt and filter hole layout inclination, thereby reduces the blockage rate of filter hole and improves the filtering efficiency of grain on filter hole. DRAWINGS

[0018] Figure 1 It is the structure schematic diagram of grain screening machine of the utility model screening aperture adjustable;

[0019] Figure 2 It is the utility model Figure 1 Another structure schematic diagram of perspective;

[0020] Figure 3 It is the utility model Figure 2 The local amplification structure schematic diagram of a place in the utility model;

[0021] Figure 4 It is the section structure schematic diagram of dynamic screen frame and transmission shaft rod of the utility model;

[0022] Figure 5 It is the structure schematic diagram of filter belt and filter hole of the utility model.

[0023] In the drawing: 1, fixed screen frame;2, dynamic screen frame;3, elastic reset part;4, roll;5, first motor;6, filter belt;7, eccentric tensioning block;8, transmission shaft rod;9, tensioning frame;10, T-shaped guide rod;11, compression spring;12, tensioning roller;13, base frame;14, vibration frame;15, elastic damping part;16, angle adjusting push rod;17, vibration motor;18, screening material discharge box;19, discharging box;20, half face gear;21, reciprocating toothed plate;22, second motor;23, shaft coupling;24, guide shaft;61, filter screen area;62, filter hole. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be apparently and completely described in conjunction with the drawings of the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of protection of the utility model.

[0025] AsFigures 1 to 5 The utility model provides a grain screening machine with adjustable screen aperture, comprising an angle-adjustable and vibratable fixed screen frame 1;

[0026] Further comprising a base frame 13 and a vibrating frame 14, two groups of symmetrically arranged elastic damping members 15 are installed between the base frame 13 and the vibrating frame 14, the vibrating frame 14 is hinged to the fixed screen frame 1, two symmetrically arranged angle-adjusting push rods 16 are hinged between the vibrating frame 14 and the fixed screen frame 1, a vibrating motor 17 is installed on the bottom surface of the vibrating frame 14, and a screening material discharging box 18 is installed on the vibrating frame 14;

[0027] Before work, the angle between the fixed screen frame 1 and the dynamic screen frame 2 and the horizontal plane can be limited through the angle-adjusting push rod 16, and then the flow rate of the material to be screened on the filter belt 6 and the screening time of the material on the filter belt 6 can be adjusted;

[0028] Further comprising a discharging box 19 installed on the vibrating frame 14, a discharging roller driven by a discharging motor is rotatably connected between the inner surfaces of the discharging box 19, a group of circumferentially arrayed discharging paddles are installed on the discharging roller, and the discharging roller and the discharging paddles are arranged to realize the quantitative discharging of the discharging box 19 per unit time;

[0029] Further comprising:

[0030] The dynamic screen frame 2, a group of elastic return members 3 are installed between the fixed screen frame 1 and the dynamic screen frame 2, two winding rollers 4 are rotatably connected to the inner wall of the dynamic screen frame 2, the two winding rollers 4 are connected through a first chain belt linkage, and a first motor 5 for driving the rotation of the winding rollers 4 is installed on the fixed screen frame 1;

[0031] Two transmission shaft rods 8 are rotatably connected to the inner wall of the dynamic screen frame 2, the output shaft end of the first motor 5 is fixedly connected with one transmission shaft rod 8, first shaft grooves are formed in the interiors of the two winding rollers 4, the two transmission shaft rods 8 are slidably connected with the two shaft grooves respectively, and the cross sections of the transmission shaft rods 8 and the shaft grooves are regular polygons;

[0032] The regular polygon cross sections of the transmission shaft rods 8 and the shaft grooves are arranged to enable the transmission shaft rods 8 to continuously drive the winding rollers 4 when the dynamic screen frame 2 and the winding rollers 4 reciprocate;

[0033] The filter belt 6 is wound between the two winding rollers 4, a group of filter screen areas 61 are arranged on the surface of the filter belt 6, filter holes 62 are uniformly distributed on each filter screen area 61, and the filter holes 62 on each filter screen area 61 are different in aperture;

[0034] During work, the screening aperture of the screening machine for grain can be quickly adjusted by switching the working filter screen area 61;

[0035] Two symmetrically arranged elastic tensioning members fixed to the dynamic screen frame 2, and the two elastic tensioning members are in contact with the filter belt 6;

[0036] The elastic tensioning piece comprises a tensioning frame 9, a plurality of T-shaped guide rods 10 are mounted on the back of the tensioning frame 9, each T-shaped guide rod 10 is in sliding connection with the movable screen frame 2, a compression spring 11 is sleeved on each T-shaped guide rod 10 and corresponds to the position between the movable screen frame 2 and the tensioning frame 9, a tensioning roller 12 is rotationally connected to the inner wall of the tensioning frame 9, and the tensioning roller 12 is in abutment with the filter belt 6;

[0037] The eccentric tensioning block 7 is rotationally connected to the movable screen frame 2 and is arranged directly below the filter belt 6;

[0038] The reciprocating transmission module is used for driving the movable screen frame 2 to reciprocally displace along the axis direction of the winding roller 4, and the eccentric tensioning block 7 is driven by the reciprocating transmission module.

[0039] The reciprocating transmission module comprises a gear shaft rotationally connected to the fixed screen frame 1, a plurality of half-face gears 20 are mounted on the gear shaft, the movable screen frame 2 is in sliding connection with the fixed screen frame 1, a reciprocating toothed plate 21 is mounted on the movable screen frame 2, each half-face gear 20 is in transmission connection with the reciprocating toothed plate 21, a second motor 22 is mounted on the fixed screen frame 1, the output shaft end of the second motor 22 is fixedly connected with the gear shaft, a shaft coupling 23 is rotationally connected to the fixed screen frame 1, a bevel gear is mounted on the gear shaft and the shaft coupling 23, the two bevel gears are in meshing, a second shaft slot is formed in the eccentric tensioning block 7, a guide shaft 24 is in sliding connection in the second shaft slot, the cross sections of the second shaft slot and the guide shaft 24 are regular polygons, and the shaft coupling 23 is in transmission connection with the guide shaft 24 through a second chain belt.

[0040] The working principle and use process of the utility model are as follows:

[0041] During work, the filter screen area 61 being worked is switched, so that the screening aperture of the grain of the screening machine is quickly adjusted, before screening operation, the angle between the fixed screen frame 1 and the movable screen frame 2 and the horizontal plane can be limited through the setting of the angle adjusting push rod 16, then the flow rate of the material to be screened on the filter belt 6 and the screening time of the material on the filter belt 6 are adjusted, during screening, the vibration motor 17 outputs the set power output rotating speed, when the vibration motor 17 outputs the rotating speed, the second motor 22 continuously works, after the second motor 22 works, through the setting of the half-face gear 20, the elastic reset piece 3 and the reciprocating toothed plate 21, the filter belt 6 can reciprocally move along the axis direction of the winding roller 4 during screening operation, through the realization of the reciprocally moving effect of the filter belt 6 during the filtering operation, the double vibration of the filter belt 6 in the vertical direction and the horizontal direction is realized, through the double vibration, the screening efficiency of the filter belt 6 on the grain material is effectively improved, and during screening operation, the eccentric tensioning block 7 circularly moves, after the eccentric tensioning block 7 circularly moves, the setting shape of the filter belt 6 and the inclination angle of the filter hole 62 on the filter belt 6 are reciprocally changed, through the change of the setting inclination angle of the filter belt 6 and the filter hole 62, the plugging rate of the filter hole 62 is reduced and the filtering efficiency of the grain from the filter hole 62 is improved.

[0042] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0043] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A grain screening machine with adjustable mesh size, comprising an angle-adjustable and vibratable fixed screen frame (1), characterized in that, Also include: The fixed sieve frame (1) and the movable sieve frame (2) are provided with a set of elastic reset members (3), the inner wall of the movable sieve frame (2) is rotatably connected with two winding rollers (4), the two winding rollers (4) are connected through the first chain belt, the movable sieve frame (1) is provided with a first motor (5) for driving the winding roller (4) to rotate, the filter belt (6) is wound between the two winding rollers (4), the surface of the filter belt (6) is provided with a set of filter screen areas (61), each filter screen area (61) is uniformly provided with filter holes (62), and the filter holes (62) on each filter screen area (61) are different in size; Two symmetrical elastic tensioning members are fixed on the movable sieve frame (2), and the two elastic tensioning members are in close contact with the filter belt (6); The eccentric tensioning block (7) is rotatably connected to the movable sieve frame (2) and is arranged directly below the filter belt (6); The reciprocating transmission module is used to drive the movable sieve frame (2) to reciprocate along the axis direction of the winding roller (4), and the eccentric tensioning block (7) is driven by the reciprocating transmission module.

2. The grain screening machine of claim 1, wherein: The inner wall of the movable sieve frame (2) is rotatably connected with two transmission shafts (8), one end of the output shaft of the first motor (5) is fixedly connected with one of the transmission shafts (8), the interiors of the two winding rollers (4) are provided with first shaft grooves, and the two transmission shafts (8) are slidably connected with the two shaft grooves, respectively.

3. The grain screening machine of claim 1, wherein: The elastic tensioning member includes a tensioning frame (9), the back surface of the tensioning frame (9) is provided with a set of T-shaped guide rods (10), each T-shaped guide rod (10) is slidably connected with the movable sieve frame (2), a compression spring (11) is arranged on each T-shaped guide rod (10) and corresponds to the position between the movable sieve frame (2) and the tensioning frame (9), the inner wall of the tensioning frame (9) is rotatably connected with a tensioning roller (12), and the tensioning roller (12) is in close contact with the filter belt (6).

4. The grain screening machine of claim 1, wherein: It also includes a base frame (13) and a vibration frame (14), two sets of symmetrical elastic damping members (15) are installed between the base frame (13) and the vibration frame (14), the vibration frame (14) is hingedly connected with the fixed sieve frame (1), two symmetrical angle adjusting push rods (16) are hingedly connected between the vibration frame (14) and the fixed sieve frame (1), a vibration motor (17) is installed on the bottom surface of the vibration frame (14), and a sieve discharge box (18) is installed on the vibration frame (14).

5. The grain screening machine of claim 1, wherein: It also includes a discharging box (19) installed on the vibration frame (14), a discharging roller driven by a discharging motor is rotatably connected between the inner surfaces of the discharging box (19), and a set of circumferentially arranged discharging flaps are installed on the discharging roller.

6. The grain screening machine of claim 1, wherein: The reciprocating transmission module comprises a gear shaft rotatably connected to the fixed screen frame (1), a set of half-face gears (20) are installed on the gear shaft, the movable screen frame (2) is slidably connected with the fixed screen frame (1), a reciprocating gear plate (21) is installed on the movable screen frame (2), each half-face gear (20) is in transmission connection with the reciprocating gear plate (21), a second motor (22) is installed on the fixed screen frame (1), the output shaft end of the second motor (22) is fixedly connected with the gear shaft, a coupling shaft (23) is rotatably connected to the fixed screen frame (1), a bevel gear is installed on the coupling shaft (23) and the gear shaft, the two bevel gears are in meshing engagement, a second shaft slot is formed in the eccentric tensioning block (7), a guide shaft (24) is slidably connected in the second shaft slot, the guide shaft (24) and the second shaft slot are both regular polygons in cross section, and the coupling shaft (23) is in transmission connection with the guide shaft (24) through a second chain belt.

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