CN216261340U - Screening machine - Google Patents

Abstract

The application relates to a screening machine belongs to material sorting technical field. The feeding frame and the conveying assembly are connected to the bearing frame; the feeding frame has the chamber that holds that is used for holding the material, the conveying subassembly includes the conveyer belt, wear to locate a plurality of pivots in the conveyer belt and be used for driving pivot pivoted driving piece, it is provided with material baffle to bear the frame, material baffle and the one end of conveyer belt enclose into material passageway, material passageway with hold the chamber and be linked together, the one end that is close to material passageway in the conveyer belt is provided with the magnetism piece of inhaling that is used for adsorbing the interior magnet of material passageway, the one end that material passageway kept away from and holds the chamber is the passageway export, the one end that material passageway was kept away from to the conveyer belt is the discharge end. This application has the effect that the impurity screening of not unidimensional size in will losing the magnetite comes out.

Description

Screening machine

Technical Field

The application relates to the field of material separation, in particular to a screening machine.

Background

In the process of magnetic material production, some magnetite waste materials often produce, these magnetite waste materials can lose magnetism and become the magnetism of losing after the demagnetization machine demagnetization, the magnetism of losing magnet can be attracted by magnetic material such as magnet, and the magnetite waste material can mix some dust or the impurity of tiny particle at the in-process of production, transportation or depositing, the magnetite waste material is when being demagnetized, impurity also can get into in the demagnetization machine together with the magnetite, make the magnetism of losing magnet that comes out from the demagnetization machine subsidiary there is impurity, the magnetism of losing magnet will be reprocessed and utilized later, these impurity have influenced the performance of losing the magnetite, so need sieve out the impurity in the magnetism of losing magnet, the impurity in the magnetism of removing magnet is usually adopted in the industry.

Referring to fig. 1, in general, a sieving machine is used in industry, and mainly includes a carrier 1, an inlet frame 2, a sieving screen 6, a vibration motor 51, and an outlet frame 38 for receiving lost magnets. The feeding frame 2 is welded on the bearing frame 1 and used for feeding the screening filter screen 6; the screening filter screen 6 is welded on the bearing frame 1, the discharging frame 38 is positioned at one end of the screening filter screen 6, which is far away from the feeding frame 2, the screening filter screen 6 is obliquely and downwards arranged towards the discharging frame 38, and the screening filter screen 6 is provided with a plurality of screen holes 61 for impurities to pass through; the vibration motor 51 is arranged on the bearing frame 1 and is used for vibrating and screening materials on the filter screen 6, so that small fixed impurities can easily fall from the sieve holes 61.

In the screening process of the screening machine, materials with impurities enter the screening filter screen 6 from the feeding frame 2, the vibrating motor 51 drives the screening filter screen 6 to vibrate, so that the impurities with small particles pass through the screen holes 61, and the magnetite with larger particles cannot pass through the screen holes 61 and slides into the discharging frame 38 from the screening filter screen 6.

In view of the above related technologies, the inventor thinks that in the above technical scheme, in the process of screening the lost magnet, when the size of the impurity is similar to that of the lost magnet, the impurity cannot pass through the sieve holes, so that the impurity and the lost magnet enter the discharge plate together, and therefore the impurity with the size similar to that of the lost magnet cannot be screened out, and the impurity in the lost magnet cannot be removed completely.

SUMMERY OF THE UTILITY MODEL

In order to sieve out the impurity of not unidimensional from losing magnetism stone, this application provides a screening machine.

The application provides a screening machine adopts following technical scheme:

a screening machine comprises a bearing frame, a feeding frame and a conveying assembly, wherein the feeding frame and the conveying assembly are connected to the bearing frame; the feeding frame has the chamber that holds that is used for holding the material, the conveying subassembly includes the conveyer belt, wears to locate a plurality of pivots in the conveyer belt and is used for driving pivot pivoted driving piece, it is provided with the material baffle to bear the frame, the material baffle with the one end of conveyer belt encloses into material passageway, material passageway with it is linked together to hold the chamber, be close to in the conveyer belt material passageway's one end is provided with and is used for adsorbing the piece is inhaled to magnetism of losing the magnetite in the material passageway, material passageway keeps away from the one end that holds the chamber is the passageway export, the conveyer belt is kept away from material passageway's one end is the discharge end.

Through adopting above-mentioned technical scheme, the screening machine during operation rotates the motor and drives the conveyer belt rotation, and in the magnetite of losing with impurity that gets into from the feed frame got into material passageway through holding the chamber, impurity wore out from material passageway's passageway export, and the magnetite of losing in the material passageway is inhaled the piece by magnetism and is adsorbed on the conveyer belt, then the conveyer belt will lose the magnetite and convey the discharge end. Utilize the magnetism to lose the magnet can be inhaled by magnetism and the piece different physical properties that can not inhale by magnetism of impurity, make the impurity through in the material passageway screened out to make the device can reject the impurity of equidimension from losing the magnet.

Optionally, the magnetic attraction piece is sleeved on the rotating shaft close to the material channel, and the outer side wall of the magnetic attraction piece is abutted to the conveyor belt.

By adopting the technical scheme, when impurities and the lost magnet are screened, the lost magnet in the magnet channel is adsorbed on the conveying belt by the magnetic attraction piece, and the magnetic attraction piece is abutted against the conveying belt and is closer to the material channel, so that the attraction force of the magnetic attraction piece to the lost magnet is stronger, and the lost magnet can be adsorbed on the conveying belt by the magnetic attraction piece, so that the lost magnet is not easy to leak out of the outlet of the channel; meanwhile, the magnetic suction piece is not arranged near the discharge end, and materials conveyed to the discharge end through the conveyor belt cannot be attracted and then slide out from the discharge end.

Optionally, the bearing frame is rotatably provided with a push rod in a penetrating manner, the push rod is used for pushing the material baffle to move close to or far away from the conveyor belt, and the push rod is in threaded connection with the bearing frame.

By adopting the technical scheme, the push rod pushes the material baffle to be close to or far away from the conveyor belt, so that the size of the material channel is controlled, when the material channel is large, the quantity of the lost magnets in the material channel is large, the area of the conveyor belt close to the material channel is limited, the magnetic attraction piece can not adsorb the lost magnets in the material channel on the conveyor belt when the materials are demagnetized, and part of the lost magnets which are not adsorbed on the conveyor belt by the magnetic attraction piece fall from the outlet of the channel, so that the lost magnets and impurities are mixed together, the push rod is pushed to move towards the material channel, the material channel is reduced, the lost magnets in the material channel are reduced, and the lost magnets are not easy to fall from the outlet of the magnets, so that the lost magnets are not easy to be mixed with the impurities; when material passageway is less, the magnetism piece of inhaling can also adsorb more magnetism and lose the magnet for a limited quantity in the material passageway, adjusts the catch bar, enlarges material passageway, makes magnetism inhale the piece and can adsorb more magnetism and lose the magnet, improves the production efficiency of screening machine.

Optionally, the material baffle is provided with a rotating shaft, and both ends of the rotating shaft are both rotated to penetrate through the bearing frame.

Through adopting above-mentioned technical scheme, when the material baffle is vertical, the magnet that loses in the material passageway receives gravity to influence, and acceleration is great to make the magnet speed of losing in the material passageway great, the piece is inhaled to magnetism this moment and can not adsorb the magnet on the conveyer belt, thereby makes the magnet of losing and impurity drop from the passageway export together. The material baffle is driven by the push rod to be close to the material channel, so that the material baffle is inclined at a certain angle, the sliding speed of the lost magnet on the material channel is reduced, and the magnetic attraction piece can adsorb the lost magnet on the conveying belt.

Optionally, one side of the feeding frame, which is close to the material channel, is provided with a discharge port communicated with the material channel, the outer side wall of the feeding frame is provided with a sliding plate for controlling the size of an opening of the discharge port, and the sliding plate is connected with the side wall of the feeding frame in a sliding manner.

By adopting the technical scheme, when the screening speed of the screening machine needs to be increased, the discharge hole is enlarged by moving the sliding plate, so that the speed of the material entering the material channel from the discharge hole is increased; when the magnets in the material channel are blocked, the sliding plate is moved to reduce the discharge hole, so that the speed of the material entering the material channel from the discharge hole is reduced, and the magnets in the material channel are not easy to block; when the screening machine is in a non-working state, the feed inlet is closed, so that dust or other impurities are not easy to enter the material channel through the feed inlet.

Optionally, the waist shape hole that slides has been seted up to the slide board, the length direction in waist shape hole that slides with the direction of motion of slide board is the same, feeding frame lateral wall is provided with and wears to locate the fastener in waist shape hole that slides, the fastener with feeding frame threaded connection.

Through adopting above-mentioned technical scheme, because what the board of sliding seted up is waist shape hole, when the board of sliding slided different positions, the fastener homoenergetic was worn to locate waist shape hole and the feeding frame lateral wall of sliding to fix the board of sliding.

Optionally, the feed frame slides and wears to be equipped with the dwang, the dwang with slide plate fixed connection.

Through adopting above-mentioned technical scheme, the dwang drives the board that slides and moves at feeding frame lateral wall, and the convenience is adjusted feed inlet opening size.

Optionally, the first connecting block of slide fixed connection, feeding frame lateral wall fixedly connected with second connecting block, the second connecting block with dwang threaded connection, the dwang rotates and wears to locate first connecting block, the dwang cover is equipped with two stop nut, two stop nut all with dwang threaded connection, two stop nut respectively with a set of opposite flank butt of first connecting block.

By adopting the technical scheme, the first connecting block is clamped by the two limiting nuts, the rotating rod and the first connecting block rotate relatively, the rotating rod and the second connecting block cannot slide relatively along the length direction of the rotating rod, and the rotating rod drives the sliding plate to move through the second connecting block when rotating, so that the sliding plate can conveniently slide on the outer side wall of the feeding frame; when the size of the opening of the discharge port is adjusted, the rotating rod is rotated to adjust the position of the sliding plate, the rotating rod is fixed on the outer side wall of the feeding frame due to the threaded connection of the second connecting block and the rotating rod, and meanwhile, the sliding plate is pre-fixed, so that the positions of the sliding plate and the waist-shaped hole are stable, and the fastener is conveniently inserted into the sliding waist-shaped hole and the outer side wall of the feeding frame; when the position of the sliding plate is adjusted by rotating the rotating rod, the rotating rod is in threaded connection with the second connecting block, so that the position of the sliding plate can be continuously adjusted by the rotating rod, and the adjusting precision is higher.

Optionally, a supporting frame for bearing the feeding frame is arranged at the top of the bearing frame, the feeding frame is arranged in the supporting frame in a penetrating mode, the outer side wall of the feeding frame is abutted to the supporting frame, and the supporting frame is connected with a vibrating motor.

Through adopting above-mentioned technical scheme, vibrating motor passes through the support frame and drives the vibration of feeding frame, drives the material vibration in the feeding frame, makes the material in the feeding frame be difficult for blockking up at the discharge gate to accelerate the speed that the material got into material passageway from the discharge gate, improve the production efficiency of screening machine, the support frame is supporting the feeding frame simultaneously, makes the vibration of feeding frame more stable.

Optionally, the support frame includes fixed frame and a plurality of buffer spring, fixed frame with the lateral wall looks butt of feeding frame, it is a plurality of buffer spring keeps away from the one end of support frame with bear the frame and connect.

By adopting the technical scheme, the two ends of the buffer spring are respectively connected with the fixed frame and the bearing frame, so that the buffer spring has a buffering effect on the vibration of the feeding frame and the fixed frame, and the impact of severe vibration on the bearing frame and the feeding frame is reduced, so that the feeding frame and the bearing frame are not easily damaged; because the spring can save and release elastic potential energy, make the vibration range of fixed frame bigger to make feeding frame vibration range bigger, thereby make the material of feeding frame more difficult the jam.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the magnetic attraction piece is used for attracting the magnetic elimination blocks in the material channel to the conveying belt, impurities in the material channel are not attracted, the impurities with different sizes in the material channel are removed, and the screening effect of the screening machine is improved;

2. the pushing rod drives the material baffle to rotate around the rotating rod to be connected, so that the size of the material channel is adjusted, the number of the demagnetizing stones in the material channel is adjusted, the demagnetizing stones in the material channel are not easily adsorbed on the conveying belt due to excessive number, and the demagnetizing stones are not easily dropped together with impurities from the channel outlet;

3. the vibrating motor drives the feeding frame to vibrate through the fixing frame, so that materials in the feeding frame are not easy to block at the discharge port, and the speed of the materials entering the material channel is increased.

Drawings

Figure 1 is a schematic diagram of the overall construction of a prior art screening machine.

Figure 2 is the overall structure of the screening machine of this application embodiment schematically.

Figure 3 is a cross-sectional view of a screening machine according to an embodiment of the present application.

Fig. 4 is a schematic structural view of a push rod of an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a feed frame in an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a support frame according to an embodiment of the present application.

Description of reference numerals: 1. a carrier; 11. a material baffle; 12. moving the baffle; 13. fixing the side plate; 14. a push rod; 15. a fixed block; 16. a rotating shaft; 17. a bearing groove; 18. a first handle; 2. a feeding frame; 21. an accommodating chamber; 211. a discharge port; 22. a slide plate; 23. a sliding waist-shaped hole; 231. a fastener; 24. a first connection block; 25. a second connecting block; 26. rotating the rod; 27. a limit nut; 28. a second handle; 29. a guide block; 3. a transfer assembly; 31. a conveyor belt; 32. a rotating shaft; 33. a rotating seat; 34. a drive member; 35. a magnetic member; 36. a discharge end; 37. a discharge plate; 38. discharging the material frame; 4. a material channel; 41. a channel outlet; 42. passing impurities through a plate; 5. a support frame; 51. a vibration motor; 52. a fixing frame; 53. a buffer spring; 54. a first connecting column; 55. a second connecting column; 6. screening a filter screen; 61. and (4) screening holes.

Detailed Description

The present application is described in further detail below with reference to figures 2-6.

The embodiment of the application discloses screening machine.

Referring to fig. 2, the screening machine comprises a bearing frame 1, a feeding frame 2 and a conveying assembly 3, wherein the bearing frame 1 is formed by welding a plurality of steel plates; the feeding frame 2 and the conveying assembly 3 are both connected with the bearing frame 1, the feeding frame 2 is funnel-shaped, and the feeding frame 2 is provided with a containing cavity 21 for containing materials.

Referring to fig. 2 and fig. 3, the conveying assembly 3 includes a conveying belt 31, two rotating shafts 32, a driving member 34 for driving the rotating shafts 32 to rotate, and a magnetic attraction member 35, in this embodiment, the driving member 34 is a motor, the two rotating shafts 32 are respectively located at two ends inside the conveying belt 31, four rotating seats 33 are welded and fixed on the bearing frame 1, two ends of the rotating shafts 32 are respectively penetrated and arranged in the two rotating seats 33, the rotating shafts 32 are rotatably connected with the rotating seats 33, one end of the rotating shafts 32 is welded and fixed with an output shaft of the motor, so that the rotating shafts 32 drive the conveying belt 31 to move.

The bearing frame 1 is connected with a material baffle plate 11, the material baffle plate 11 comprises a movable baffle plate 12 and two fixed side plates 13, the two fixed side plates 13 are welded on the same side of the movable baffle plate 12, and the movable baffle plate 12, the two fixed side plates 13 and the conveyor belt 31 enclose a material channel 4. One side of the feeding frame 2 close to the material channel 4 is provided with a discharging hole 211, the discharging hole 211 is communicated with the accommodating cavity 21, the discharging hole 211 is communicated with the material channel 4, and the impurity-containing magnetite enters the accommodating cavity 21 from the feeding frame 2 and then enters the material channel 4 through the discharging hole 211.

The magnetic part 35 is sleeved on the rotating shaft 32 close to the material channel 4, the magnetic part 35 is fixedly connected with the rotating shaft 32 through glue, and the outer side wall of the magnetic part 35 is abutted to the conveyor belt 31. Magnetism is inhaled piece 35 and is adsorbed the lost magnetism stone in material passageway 4 on conveyer belt 31, and in this embodiment, magnetism is inhaled piece 35 and can be magnet.

Wherein, the one end that material passageway 4 was kept away from to conveyer belt 31 is discharge end 36, and the welding of one side that material passageway 4 was kept away from to bear frame 1 has ejection of compact board 37, and ejection of compact board 37 is used for accepting the magnetic loss stone of following discharge end 36 landing, and material passageway 4 keeps away from the one side that holds chamber 21 and be channel exit 41, and the welding of one side that bearing frame 1 kept away from feeding frame 2 has impurity to lead to the board 42, and impurity leads to the board 42 slope setting, and impurity leads to the board 42 and is used for accepting the impurity that drops from channel exit 41.

When the sieving machine works, the demagnetizing stones containing impurities enter from the feeding frame 2 and enter the material channel 4 through the accommodating cavity 21, the magnetic attraction piece 35 adsorbs the demagnetizing stones in the material channel 4 onto the conveying belt 31, then the conveying belt 31 conveys the demagnetizing stones to the discharging end 36, and finally the demagnetizing stones fall into the discharging plate 37 in a sliding mode; the impurities are not attracted by the magnetic attraction piece 35, so that the impurities in the material channel 4 fall to the channel outlet 41 by gravity and then enter the impurity through plate 42.

Referring to fig. 4, a push rod 14 penetrates through the carrier 1, one end of the push rod 14 abuts against one side, far away from the material channel 4, of the movable baffle 12, two fixing blocks 15 are welded on one side, close to the material channel 4, of the carrier 1, the push rod 14 penetrates through the two fixing blocks 15, and the push rod 14 is in threaded connection with the fixing blocks 15. The movable baffle 12 is welded with a rotating shaft 16, one side of the bearing frame 1 close to the material channel 4 is provided with two bearing grooves 17, two ends of the rotating shaft 16 respectively rotate to penetrate through the two bearing grooves 17, and the movable baffle 12 is rotatably connected with the bearing frame 1. Wherein, the first handle 18 that makes things convenient for catch bar 14 to rotate is welded to the one end that the catch bar 14 keeps away from movable baffle 12, and the first handle 18 is the perpendicular welding of the tip of two steel pipes and constitutes.

When adjusting the size of material passageway 4, rotate catch bar 14 and drive movable baffle 12 and be close to or keep away from conveyer belt 31, adjust the interval of movable baffle 12 and conveyer belt 31 to adjust the quantity of the magnet of losing that material passageway 4 can hold, and then adjust the flow of the interior magnet of losing of material passageway 4.

Referring to fig. 5, the outer side wall of the feeding frame 2 is connected with a sliding plate 22 for controlling the opening size of the discharging port 211, the sliding plate 22 is provided with two sliding waist-shaped holes 23, the sliding plate 22 is provided with two fasteners 231, the fasteners 231 sequentially penetrate through the sliding waist-shaped holes 23 and the outer side wall of the feeding frame 2, and the fasteners 231 are connected with the outer side wall of the feeding frame through threads. Wherein, fastener 231 can be the bolt, can be the screw, and this embodiment fastener 231 is the screw, and for the hand screw, through setting up the hand screw, conveniently adjusts slide plate 22 and at feeding frame 2 gliding movement.

One side welding that slide plate 22 kept away from feeding frame 2 lateral wall has first connecting block 24, and the welding of 2 lateral walls of feeding frame has second connecting block 25, and the lateral wall of feeding frame 2 is provided with dwang 26, and second connecting block 25 and first connecting block 24 are worn to locate in the rotation in proper order to the one end of dwang 26, dwang 26 and second connecting block 25 threaded connection. The dwang 26 cover is equipped with two stop nut 27, two stop nut 27 and dwang 26 threaded connection, two stop nut 27 and a set of opposite flank butt of first connecting block 24.

Wherein, the welding of slide plate 22 has guide block 29, and guide block 29 is located between first connecting block 24 and the second connecting block 25, and dwang 26 rotates and wears to locate in guide block 29. The side of the rotating rod 26 far away from the first connecting block 24 is welded with a second handle 28 which facilitates the rotation of the rotating rod 26, and the second handle 28 is a steel pipe.

When the opening size of the discharge port 211 is adjusted, the rotating rod 26 is rotated to make the rotating rod 26 drive the sliding plate 22 to be close to or far from the conveyor belt 31, so that the opening size of the discharge port 211 is changed. Then, the fastening member 231 is screwed into the sliding waist-shaped hole 23 and the outer side wall of the feeding frame 2 in sequence to fix the sliding plate 22.

Referring to fig. 6, a supporting frame 5 is disposed on the top of the bearing frame 1, the supporting frame 5 includes a fixing frame 52 and a buffer spring 53, the fixing frame 52 is welded with a vibration motor 51, the feeding frame 2 is inserted into the fixing frame 52, and the outer side wall of the feeding frame 2 is welded and fixed to the fixing frame 52. The bottom welding of fixed frame 52 has first spliced pole 54, and the welding of the top of bearing frame 1 has second spliced pole 55, and buffer spring 53 is located between fixed frame 52 and the bearing frame 1, and the cover is established respectively on first spliced pole 54 and second spliced pole 55 at buffer spring 53's both ends, and the lateral wall of first spliced pole 54 and the lateral wall of second spliced pole 55 all with buffer spring 53 butt.

When the vibration motor 51 works, the vibration motor 51 drives the feeding frame 2 to vibrate through the fixing frame 52, so that materials in the feeding frame 2 are not easy to block.

The implementation principle of the screening machine of the embodiment of the application is as follows: when the screening machine works, the vibration motor 51 drives the feeding frame 2 to vibrate, and the driving piece 31 drives the conveying belt 31 to rotate through the rotating shaft 32. The demagnetizing stones containing impurities enter the material channel 4 from the feeding frame 2, the magnetically attracting piece 35 close to the material channel 4 adsorbs the demagnetizing stones on the conveyor belt 31, and the demagnetizing stones are conveyed to the discharging plate 37 through the conveyor belt 31; the impurities are not attracted by the magnetic attraction piece 35 and fall onto the impurity through plate 42 from the material outlet.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A screening machine which characterized in that: the feeding device comprises a bearing frame (1), a feeding frame (2) and a conveying assembly (3), wherein the feeding frame (2) and the conveying assembly (3) are connected to the bearing frame (1); the feeding frame (2) is provided with a containing cavity (21) for containing materials, the conveying assembly (3) comprises a conveying belt (31), a plurality of rotating shafts (32) arranged in the conveying belt (31) in a penetrating way and a driving piece (34) for driving the rotating shafts (32) to rotate, the bearing frame (1) is provided with a material baffle (11), a material channel (4) is enclosed by the material baffle (11) and one end of the conveyor belt (31), the material channel (4) is communicated with the containing cavity (21), one end of the conveyor belt (31) close to the material channel (4) is provided with a magnetic attraction piece (35) for attracting the lost magnet in the material channel (4), one end of the material channel (4) far away from the containing cavity (21) is a channel outlet (41), and one end of the conveyor belt (31) far away from the material channel (4) is a discharge end (36).

2. The screening machine according to claim 1, wherein: the magnetic attraction piece (35) is sleeved on the rotating shaft (32) close to the material channel (4), and the outer side wall of the magnetic attraction piece (35) is abutted to the conveyor belt (31).

3. The screening machine according to claim 1, wherein: the material baffle (11) is pushed to be close to or far away from the push rod (14) moving of the conveyor belt (31) in a rotating and penetrating mode by the bearing frame (1), and the push rod (14) is in threaded connection with the bearing frame (1).

4. The screening machine according to claim 1, wherein: the material baffle (11) is provided with a rotating shaft (16), and both ends of the rotating shaft (16) are rotatably arranged on the bearing frame (1).

5. The screening machine according to claim 1, wherein: one side of the feeding frame (2) close to the material channel (4) is provided with a discharge hole (211) communicated with the material channel (4), the outer side wall of the feeding frame (2) is provided with a sliding plate (22) used for controlling the opening size of the discharge hole (211), and the sliding plate (22) is connected with the side wall of the feeding frame (2) in a sliding manner.

6. The screening machine according to claim 5, wherein: slip waist shape hole (23) have been seted up in slide plate (22), the length direction in slip waist shape hole (23) with the direction of motion of slide plate (22) is the same, feeding frame (2) lateral wall is provided with wears to locate fastener (231) in slip waist shape hole (23), fastener (231) with feeding frame (2) threaded connection.

7. The screening machine according to claim 5, wherein: feed frame (2) slide and wear to be equipped with dwang (26), dwang (26) with slide board (22) fixed connection.

8. The screening machine according to claim 7, wherein: slide plate (22) first connecting block of fixedly connected with (24), feeding frame (2) lateral wall fixedly connected with second connecting block (25), second connecting block (25) with dwang (26) threaded connection, dwang (26) are rotated and are worn to locate first connecting block (24), dwang (26) cover is equipped with two stop nut (27), two stop nut (27) all with dwang (26) threaded connection, two stop nut (27) respectively with a set of opposite flank butt of first connecting block (24).

9. The screening machine according to claim 1, wherein: the top of bearing frame (1) is provided with and is used for bearing support frame (5) of feeding frame (2), feeding frame (2) wear to locate in support frame (5), the lateral wall of feeding frame (2) with support frame (5) looks butt, support frame (5) are connected with vibrating motor (51).

10. The screening machine according to claim 9, wherein: the supporting frame (5) comprises a fixing frame (52) and a plurality of buffer springs (53), the fixing frame (52) is abutted to the outer side wall of the feeding frame (2), and the buffer springs (53) are far away from one end of the supporting frame (5) and connected with the bearing frame (1).

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