CN115157751B

CN115157751B - Double-shaft screw conveyor

Info

Publication number: CN115157751B
Application number: CN202211082034.0A
Authority: CN
Inventors: 杨镇伟; 奚乐群; 史浩; 励谷明; 顾磊; 楚敬华; 杨杰; 蒋姗姗; 方盛; 吴飞
Original assignee: Changzhou Huamu Intelligent Technology Co ltd
Current assignee: Changzhou Huamu Intelligent Technology Co ltd
Priority date: 2022-09-06
Filing date: 2022-09-06
Publication date: 2022-11-15
Anticipated expiration: 2042-09-06
Also published as: CN115157751A

Abstract

The invention discloses a double-shaft screw conveyor, which relates to the technical field of conveyors and comprises a rack, a conveying unit, a power unit and a matching unit, wherein the conveying unit is arranged on the rack; the conveying unit comprises two supporting shafts with helical blades, an upper supporting frame and a lower supporting frame, wherein a plurality of filter screens are arranged at concave parts in the upper supporting frame and the lower supporting frame, gaskets are arranged on the side edges of the upper supporting frame and the lower supporting frame, and a conical surface top ring is arranged at one end of each supporting shaft; the power unit comprises a bearing seat and a driving unit, the driving unit drives one support shaft to rotate, and the two support shafts are in meshing transmission through gears; the matching unit comprises a housing, a receiving bin and a discharging hopper, wherein the side wall of the housing is provided with a plurality of push-pull type cover plates, and a feeding hole is formed in the top of the cover plates. The invention adopts two ways to regulate and control the conveying unit, firstly, the opening area of the feed opening is changed through the adjustable conical top ring; and secondly, the upper support frame and the lower support frame are pressed through the adjusting bolts, so that the filter screens at corresponding positions shrink, and the conveying stability of the conveyor is finally guaranteed.

Description

Double-shaft screw conveyor

Technical Field

The invention relates to the technical field of conveyors, in particular to a double-shaft screw conveyor.

Background

The screw conveyer is a mechanical device which utilizes a motor to drive a screw to rotate so as to push materials to achieve the purpose of conveying, and is widely applied to various industries. In order to meet the requirements of different industries, the improvement of the screw conveyor is diversified. For example, in the feed industry, the meat quality of animals including poultry meat, animal internal organs, animal leftovers and the like can be extruded in the conveying process to realize certain solid-liquid separation so as to obtain the feed, the oil-water mixture and the meat and bone meal can be respectively obtained through the solid-liquid separation, and the meat and bone meal is used as a main raw material of the animal feed.

Chinese patent with patent publication No. CN107352229A, a novel solid-liquid mixing screw press conveyor is provided, which comprises a transmission device, a screw conveyor shell, a rotating shaft, a screw blade, a cutting blade and a discharging impeller; the helical blade is arranged at the periphery of the rotating shaft, the pitch of the helical blade is reduced along with the reduction of the shaft diameter of the rotating shaft, the outer diameter of the helical blade is kept unchanged, and the cutting blade is arranged at the small shaft diameter end of the rotating shaft; one end of the discharge impeller is connected with the small shaft diameter end of the rotating shaft in an interference fit mode, the other end of the discharge impeller is connected with a pipeline of the liquid material discharge port through a bearing, and a plurality of liquid discharge holes are formed in the barrel body of the discharge impeller.

Above-mentioned technical scheme is at the transportation process, because the extrusion of animal meat quality is born for a long time to the conveyer casing, therefore its inner wall can produce wearing and tearing and deformation, and above-mentioned change is not neglected in actual processing, and this can lead to conveyer casing inner space grow, and then directly influence the conveying efficiency of conveyer. Taking the obtained meat and bone meal as an example, after the meat of animals is sent into the conveyor, the solid-liquid separation in the obtained meat and bone meal is not thorough, which can affect the finished product production of the feed, and under the condition, the conveyor can only be directly replaced, which can greatly improve the use cost of the conveyor.

Disclosure of Invention

The invention aims to provide a double-shaft screw conveyor which has the advantages of stable conveying, adjustable compression ratio, long service life, replaceable parts and convenience in operation.

The invention is realized by the following technical scheme:

a double-shaft screw conveyor comprises a rack, a conveying unit, a power unit and a matching unit, wherein the conveying unit, the power unit and the matching unit are arranged in the rack; the conveying unit comprises two parallel supporting shafts, helical blades are wound around the supporting shafts, upper and lower sides of the two supporting shafts are respectively provided with an upper supporting frame and a lower supporting frame, the opposite surfaces of the upper supporting frame and the lower supporting frame are of concave structures, a plurality of filter screens are inserted into the concave parts of the upper supporting frame and the lower supporting frame, gaskets are arranged at the intersection of the side edges of the upper supporting frame and the lower supporting frame, and one end of each supporting shaft is adjustably provided with a conical surface top ring; the power unit comprises bearing seats and a driving unit which are respectively positioned at two ends of the rack, the driving unit drives any one of the supporting shafts to rotate, and the two supporting shafts are in meshing transmission through gears; the supporting unit comprises a receiving bin and a discharging hopper which are arranged at the bottom of the rack, the top of the rack is provided with a housing, the side wall of the rack is provided with a plurality of push-pull type cover plates, and a feeding hole is formed in the top of the housing.

Further setting the following steps: two side edges of the lower support frame are respectively hinged with a plurality of rotating rods, the rotating rods can rotate and are sleeved on the side edges of the upper support frame, and the top of each rotating rod is provided with a pressing bolt; the gasket is arranged between the two arranging grooves, the cross section of the gasket is trapezoidal, and a plurality of adjusting springs are arranged in the arranging grooves and used for supporting the gasket.

Further setting the following steps: and a lubricant is coated in the placing groove.

Further setting the following steps: the frame both ends all are provided with and are used for fixing the frame of upper bracket with the frame of bottom suspension, both sides all are provided with the support flat board about the frame just the support flat board pass through supporting spring with the frame is connected.

Further setting the following steps: four clamping grooves are formed in the inner concave part of the upper support frame or the lower support frame, two rows of filter screens are longitudinally arranged in the upper support frame or the lower support frame, and each filter screen is respectively clamped in the corresponding two clamping grooves.

Further setting the following steps: the two arc-shaped pressure rods are arranged at the same end of the upper support frame and the lower support frame, a fixed top ring and a conical top ring are fixed at the end part of the support shaft in a sliding manner, a plurality of adjusting bolts penetrate through the fixed top ring and are abutted against the side surface of the conical top ring at the same time, and nuts are arranged on the adjusting bolts; the feeding hopper is arranged on the conical surface top ring, a feeding hole is formed between the arc-shaped pressing rod and the conical surface top ring and is located right above the discharging hopper, and a feeding bin is arranged at one end of the lower supporting frame and is located right below the feeding hole.

Further setting the following steps: the spiral directions of the spiral blades on the two support shafts are opposite.

Further setting the following steps: the diameter of the supporting shaft close to one end of the discharge hopper is larger than that of the supporting shaft close to one end of the feed inlet, and the pitch of the helical blade close to one end of the discharge hopper is smaller than that of the helical blade close to one end of the feed inlet.

Further setting the following steps: an observation cleaning port is formed in the side wall of the receiving bin.

Further setting the following steps: an exhaust port is integrally formed at the top of the housing.

In conclusion, the beneficial technical effects of the invention are as follows:

(1) According to the invention, the two support shafts are arranged in the conveying space, the animal meat does not slip in the conveying process by utilizing the rotation reversal of the two support shafts, the stability in the conveying process is ensured, and the animal meat is squeezed by utilizing the gradually-increased diameter of the support shafts and the gradually-decreased screw pitch of the helical blades, so that the meat and bone meal is obtained;

(2) The upper support frame and the lower support frame are adopted to fix the filter screen, so that an effective conveying space is formed, the size of the conveying space is stable, and different from an integrated shell in the prior art, the manufacturing process difficulty of a single filter screen is low, the replaceability is improved, and the maintenance is more convenient;

(3) According to the invention, the upper support frame and the lower support frame are pressed tightly through the adjusting bolt on the rotating rod, the gasket between the upper support frame and the lower support frame is correspondingly adjusted in the arranging groove, and the filter screen at the corresponding adjusting position is drawn close to the direction of the support shaft, so that the space change caused by the deformation of the filter screen is compensated, and the conveying stability is ensured;

(4) The conical surface top ring is driven to move towards one side of the arc-shaped pressure rod, so that the distance between the conical surface top ring and the arc-shaped pressure rod is changed, the opening area of the feed opening is changed to control the discharge amount of meat and bone meal, and the regulation and control of the compression ratio of the conveyor are further realized;

(5) On the basis of adjustable compression ratio, the invention reduces the demand of bone-meat ratio in animal meat, reduces the requirement on raw materials, increases the operation width of equipment, increases the protein content in the meat and bone powder of the raw materials after the raw materials pass through the conveyor,

the yield of grease is also increased correspondingly.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of a portion B of FIG. 3;

FIG. 5 is an enlarged view of a portion C of FIG. 3;

FIG. 6 is a schematic view of the construction of the conveying unit in the present invention;

FIG. 7 is an enlarged view of portion D of FIG. 6;

FIG. 8 is a schematic cross-sectional view of a delivery unit of the present invention;

fig. 9 is a top view of the support shaft and helical blade of the present invention.

Reference numerals: 1. a frame; 2. a support shaft; 3. a helical blade; 4. an upper support frame; 5. a lower support frame; 6. filtering with a screen; 7. a gasket; 8. a conical top ring; 9. a bearing seat; 10. driving the machine set; 11. a receiving bin; 12. a discharge hopper; 13. a housing; 14. a cover plate; 15. a feed inlet; 16. a rotating rod; 17. a hold-down bolt; 18. a placing groove; 19. adjusting the spring; 20. an outer frame; 21. supporting the flat plate; 22. a support spring; 23. a card slot; 24. an arc-shaped compression bar; 25. fixing the top ring; 26. adjusting the bolt; 27. a nut; 28. a feeding port; 29. observing and cleaning the opening; 30. and (7) an exhaust port.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1 and 2, the double-shaft screw conveyor disclosed by the invention comprises a frame 1, wherein a conveying unit for conveying and realizing solid-liquid separation, a power unit for providing power and a matching unit for assisting in feeding and discharging are arranged in the frame 1.

Referring to fig. 6 and 9, the conveying unit includes two support shafts 2 disposed parallel to each other, helical blades 3 are spirally fixed to the peripheral sides of the support shafts 2, and the helical blades 3 on the two support shafts 2 are staggered with each other. The conveying unit further comprises an upper supporting frame 4 and a lower supporting frame 5, the structures of the upper supporting frame 4 and the lower supporting frame 5 are formed by a plurality of transverse plates which are arranged in parallel and a plurality of longitudinal rods which are fixedly connected with all the transverse plates at the same time, the upper supporting frame 4 and the lower supporting frame 5 are positioned at the upper side and the lower side of the two supporting shafts 2, and the upper supporting frame 4 and the lower supporting frame 5 are combined with a graph 8, the opposite sides of the upper supporting frame 4 and the lower supporting frame 5 are of concave structures, and the concave structures of the concave structures are formed with conveying spaces capable of accommodating the supporting shafts 2 and the spiral blades 3. The cross-section of the conveying space is two partially coinciding ellipses with the foci of the ellipses lying on the horizontal line. Referring to fig. 6 and 7, the lower supporting frame 5 is hinged to a plurality of rotating rods 16 along two sides of the length direction, the rotating rods 16 can rotate to one side of the upper supporting frame 4 and are sleeved on the side of the upper supporting frame 4, the rotating rods 16 are located on one edge of the top of each transverse plate in the lower supporting frame 5, and the rotating rods 16 can be turned over to the edge of the corresponding transverse plate of the upper supporting frame 4. The top thread of the rotating rod 16 is provided with a compression bolt 17 in a penetrating way, and the bottom of the compression bolt 17 can abut against the top surface of the upper support frame 4 after penetrating through the rotating rod 16. The upper support frame 4 and the lower support frame 5 are arranged in a detachable structure, so that the difficulty of the manufacturing process is simplified, and the processing production and the field assembly are facilitated.

Referring to fig. 4, fig. 6 and fig. 8, the opposite face department of upper support frame 4 and lower support frame 5 all inserts and is provided with a plurality of filter screens 6, filter screen 6 has four rows and has two in the upper support frame 4 along the direction of feed longitudinal arrangement in transport space, there are two in the lower support frame 5, four draw-in grooves 23 have been seted up along the direction of feed in transport space to the interior concave department of upper support frame 4, wherein, four two liang bilateral symmetry settings of draw-in groove 23, respectively the joint is equallyd divide on the both sides limit of filter screen 6 in two draw-in grooves 23 with one side. Similarly, four clamping grooves 23 are also formed in the inward concave part of the lower support frame 5 along the feeding direction of the conveying space, wherein the four clamping grooves 23 are arranged in a bilaterally symmetrical mode, two sides of the filter screen 6 are respectively clamped in the two clamping grooves 23 on the same side, and all the filter screens 6 finally surround to form a complete conveying space. All the filter screens 6 are detachably arranged in the upper support frame 4 and the lower support frame 5, and the integral conveying shell is adopted in the prior art, so that the whole conveying shell needs to be replaced after part of the conveying shell is deformed or damaged or is broken.

Referring to fig. 4, the intersection of the two side edges of the upper support frame 4 and the lower support frame 5 is provided with two installation grooves 18, the opening direction of the installation grooves 18 faces the conveying space, the side walls of the installation grooves 18 are wedge surfaces, the intersection of the side edges of the upper support frame 4 and the lower support frame 5 is provided with two gaskets 7, the length of each gasket 7 is consistent with that of the upper support frame 4, each gasket 7 is arranged in the middle of the two installation grooves 18 on the same side, the cross section of each gasket 7 is trapezoidal, the short side of each gasket 7 faces the conveying space, the installation grooves 18 of the lower support frame 5 are also fixedly provided with a plurality of adjusting springs 19 arranged along the axial line direction of the support shaft 2, one end of each adjusting spring 19 facing the conveying space is fixed with the long side of each gasket 7, and the inside each installation groove 18 is coated with a lubricant, so that the two side edges of each gasket 7 are respectively attached to the inner walls of the installation grooves 18 on the corresponding sides.

In the invention, the upper support frame 4 and the lower support frame 5 are fixed together by buckling the rotating rod 16 on the upper support frame 4, the gap at the intersection of the upper support frame 4 and the lower support frame 5 is filled by the gasket 7, and the adjusting spring 19 is used for supporting the gasket 7 to enable the gasket 7 to be tightly attached to the upper support frame 4 and the lower support frame 5; the gap size between the upper support frame 4 and the lower support frame 5 can be controlled by rotating the pressing bolt 17, so that the internal volume of the conveying space is changed, the compression ratio inside the conveyor is also adjusted, the position of the gasket 7 can be adjusted according to the gap size, the filter screen 6 is closer to the meat of animals, and the transmission efficiency is improved. In this way, the screen 6 on the side of the corresponding position can be adjusted by each turning bar 16, so that the deformed screen 6 is pressed accurately.

Referring to fig. 3 and 5, the frame 20 for fixing the upper support frame 4 and the lower support frame 5 is installed at both ends of the frame 1, the frame 20 has a square structure and two frames, the upper and lower sides of the frame 20 are elastically provided with the support plates 21, the support plates 21 are fixedly connected with the side walls of the frame 20 through the support springs 22, the top end of the upper support frame 4 and the bottom end of the lower support frame 5 are respectively pressed by the two support plates 21, and the support springs 22 can adopt a type with a large elastic coefficient to overcome the gravity generated by the upper support frame 4 and the lower support frame 5 during the conveying operation. In the present invention, in order to improve the adjustability of the outer frame 20, a triangular pad may be inserted between the bottom of the outer frame 20 and the rack 1, and the height position of the outer frame 20 is further finely adjusted by the triangular pad. The presence of the outer frame 20 allows to position the upper support frame 4 and the lower support frame 5 in their central positions so that the two support shafts 2 pass through the center of the conveying space.

Referring to fig. 6 and 7, the length of the upper support frame 4 is shorter than that of the lower support frame 5, two arc-shaped pressure rods 24 are fixed at one end of the upper support frame 4 aligned with the lower support frame 5 through bolts, each arc-shaped pressure rod 24 is fixed with the upper support frame 4 and the lower support frame 5 at the same time, the arc-shaped pressure rods 24 are made of high-temperature-resistant resin materials with deformability, and the materials can be selected from polyimide, polytetrafluoroethylene or polyphenyl ether. The arc-shaped compression bar 24 effectively fixes the same-end joint of the upper support frame 4 and the lower support frame 5, and when the distance between the upper support frame 4 and the lower support frame 5 is fine-adjusted, the arc-shaped compression bar 24 slightly deforms to adapt to adjustment.

The end part of the supporting shaft 2, which is positioned on the same side of the arc-shaped pressure rod 24, is fixedly provided with a fixed top ring 25 and a conical top ring 8 in a sliding manner, the conical top ring 8 is positioned between the fixed top ring 25 and the arc-shaped pressure rod 24, and the conical side of the conical top ring faces the conveying space. A plurality of adjusting bolts 26 are arranged on the fixed top ring 25 in the circumferential direction in a penetrating manner, one end of each adjusting bolt 26 is abutted against the side surface of the conical top ring 8 after penetrating through the fixed top ring 25, and a nut 27 is fixed on each adjusting bolt 26 through a thread. A feed opening 28 is formed between the two arc-shaped compression rods 24 and the two conical top rings 8. The distance between the conical top ring 8 and the arc-shaped pressure rod 24 can be adjusted by rotating the nut 27, so that the size of an outlet of the feed opening 28 is changed, the adaptability adjustment in the conveying process is realized, and the compression ratio of the conveyor can be further changed. A feeding bin (not shown) is fixed at one end of the upper support frame 4 far away from the feed opening 28 and is erected above the lower support frame 5.

Referring to fig. 1 and 2, the power unit includes a bearing seat 9, the bearing seat 9 is fixed at one end of the frame 1, one end of each of the two support shafts 2, which is far away from the fixed top ring 25, extends into the bearing seat 9 and supports the two support shafts 2 through the bearing seat 9, the end of the frame 1, which is far away from the bearing seat 9, is provided with a drive unit 10, and the drive unit 10 includes a speed reducer, a transmission chain and a drive motor. The driving unit 10 can drive any one of the supporting shafts 2 to directly rotate, the same end of each of the two supporting shafts 2 is fixed with a gear, the two supporting shafts 2 are directly meshed for transmission through the gear, and the rotating directions of the two supporting shafts 2 are opposite.

Referring to fig. 1, the matching unit includes a receiving bin 11, the receiving bin 11 is fixed at the bottom position of the frame 1, the top opening of the receiving bin is opposite to all the filter screens 6, the side wall of the receiving bin 11 is provided with an observing and cleaning opening 29, the observing and cleaning opening 29 is provided with a closed door, the bottom position of the frame 1 is also fixed with a discharging hopper 12, and the discharging hopper 12 is located right below the discharging opening 28. The receiving bin 11 is used for recovering liquid generated in the transmission process, the liquid is a mixture of meat residue, grease and water, and the discharging hopper 12 is used for recovering meat and bone meal generated by squeezing.

A housing 13 is fixed on the top of the frame 1, a plurality of push-pull type cover plates 14 are respectively installed on two side walls of the housing 13, and the cover plates 14 can be opened so as to facilitate personnel to maintain and adjust the upper support frame 4 and the lower support frame 5 in the housing 13. The top of housing 13 is seted up feed inlet 15, and feed inlet 15 is just to feeding storehouse position. An exhaust port 30 is integrally formed at the center of the top of the casing 13, and the animal meat is transferred through the exhaust port 30 and the gas generated during the pressing process is rapidly discharged.

Referring to fig. 1, 6 and 9, the spiral directions of the spiral blades 3 on the two support shafts 2 are opposite, the diameter of the end of the support shaft 2 close to the discharge hopper 12 is larger than that of the end close to the feed port 15, the pitch of the end of the spiral blade 3 close to the discharge hopper 12 is smaller than that of the end close to the feed port 15, and the diameter of the support shaft 2 and the pitch of the spiral blade 3 are in smooth transition. After the animal meat is fed into the conveyor, the animal meat can be quickly squeezed in the conveying process through the diameter of the supporting shaft 2 which is gradually increased in edge and the pitch of the spiral blades 3 which are gradually narrowed. Because the rotation directions of the two supporting shafts 2 are opposite, the slipping phenomenon in the animal meat quality transmission process can be avoided by adopting the double-shaft arrangement, and the conveying efficiency is improved.

The working principle and the beneficial effects of the invention are as follows:

the meat enters the conveying unit inside the housing 13 from the feed opening 15, and the meat moves to one end of the feed opening 28 under the conveying of the spiral blade 3, in the process, the meat is continuously squeezed, so that a large amount of liquid is discharged, the liquid finally passes through the filter screen 6 and is discharged from the receiving bin 11, and meat and bone meal generated from the liquid is discharged from the feed opening 28.

The setting of going up support frame 4 and bottom suspension strut 5 can realize effective support and protection to filter screen 6, reduces filter screen 6's deformation, and the setting of two back shafts 2 makes the transmission in-process animal meat can not skid simultaneously, and transportation process is more stable. When the compression ratio of the conveyor is changed after the conveyor is used for a long time, the invention can be used independently or collectively in two modes to regulate and control the compression ratio of the conveying unit, firstly, the adjustable conical top ring 8 moves towards the arc-shaped pressure rod 24, so that the opening area of the feed opening 28 is changed; secondly, when part of the filter screen 6 is deformed, the upper support frame 4 and the lower support frame 5 are pressed through the pressing bolt 17, so that the filter screen 6 at the position is close to the support shaft 2. In the invention, the compression ratio of the conveyor is controllable and adjustable in multiple directions, the conveying effect of the conveyor is ensured, the squeezing effect is improved, the service life of the conveyor is prolonged in a one-sided manner, and the conveyor has higher economic value for practical application of the conveyor. On the other hand, the compression ratio of the invention is adjustable, so that on the premise of actively adjusting the compression ratio, the requirement of raw materials can be reduced, the operation width of the conveyor is increased, and meanwhile, after the raw materials pass through the conveyor, the protein content in meat and bone meal is higher, and the yield of grease can be correspondingly increased.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A double-shaft screw conveyor is characterized in that: comprises a frame (1), and a conveying unit, a power unit and a matching unit which are arranged in the frame (1);

the conveying unit comprises two parallel supporting shafts (2), helical blades (3) are wound around the supporting shafts (2), upper supporting frames (4) and lower supporting frames (5) are respectively arranged on the upper sides and the lower sides of the two supporting shafts (2), the opposite surfaces of the upper supporting frames (4) and the lower supporting frames (5) are of concave structures, a plurality of filter screens (6) are inserted into the concave parts of the upper supporting frames and the lower supporting frames, gaskets (7) are arranged at the intersection positions of the side edges of the upper supporting frames and the lower supporting frames, and a conical surface top ring (8) is adjustably arranged at one end of each supporting shaft (2);

the power unit comprises bearing seats (9) and a driving unit (10) which are respectively positioned at two ends of the rack (1), the driving unit (10) drives any one of the supporting shafts (2) to rotate, and the two supporting shafts (2) are in meshing transmission through gears;

the supporting unit comprises a receiving bin (11) and a discharging hopper (12) which are arranged at the bottom of the rack (1), a housing (13) is arranged at the top of the rack (1), a plurality of push-pull type cover plates (14) are arranged on the side walls of the housing, and a feeding hole (15) is formed in the top of the housing (13);

two side edges of the lower support frame (5) are respectively hinged with a plurality of rotating rods (16), the rotating rods (16) can rotate and are sleeved on the side edges of the upper support frame (4), and the tops of the rotating rods (16) are provided with pressing bolts (17);

the gasket is characterized in that the intersection positions of two side edges of the upper supporting frame (4) and the lower supporting frame (5) are provided with placing grooves (18), the gaskets (7) are placed in the middle of the two placing grooves (18), the cross sections of the gaskets are trapezoidal, and a plurality of adjusting springs (19) are further arranged in the placing grooves (18) and used for supporting the gaskets (7).

2. A twin-shaft screw conveyor as defined in claim 1, wherein: the placing groove (18) is internally coated with a lubricant.

3. A twin-shaft screw conveyor as defined in claim 1, wherein: frame (1) both ends all are provided with and are used for fixing go up support frame (4) with frame (20) of lower carriage (5), both sides all are provided with support flat board (21) about frame (20) just support flat board (21) pass through supporting spring (22) with frame (20) are connected.

4. A twin-shaft screw conveyor as defined in claim 1, wherein: four clamping grooves (23) are formed in the concave part of the upper supporting frame (4) or the lower supporting frame (5), two rows of filter screens (6) are longitudinally arranged in the upper supporting frame (4) or the lower supporting frame (5), and each filter screen (6) is respectively clamped in the corresponding two clamping grooves (23).

5. The twin-shaft screw conveyor according to claim 1, wherein: two arc-shaped pressure levers (24) are arranged at the same end of the upper support frame (4) and the lower support frame (5), a fixed top ring (25) and a conical surface top ring (8) are fixed at the end part of the support shaft (2) in a sliding manner, a plurality of adjusting bolts (26) are arranged on the fixed top ring (25) in a penetrating manner, all the adjusting bolts (26) are simultaneously abutted against the side surface of the conical surface top ring (8), and nuts (27) are arranged on the adjusting bolts (26);

wherein, arc depression bar (24) with be formed with feed opening (28) just between conical surface apical ring (8) feed opening (28) are located directly over hopper (12), lower carriage (5) one end is provided with the feeding storehouse just the feeding storehouse is located directly under feed inlet (15).

6. A twin-shaft screw conveyor as defined in claim 1, wherein: the spiral directions of the spiral blades (3) on the two support shafts (2) are opposite.

7. The twin-shaft screw conveyor according to claim 1, wherein: the diameter that back shaft (2) are close to go out hopper (12) one end is greater than it is close to the diameter of feed inlet (15) one end, helical blade (3) are close to the pitch of going out hopper (12) one end is less than it is close to the pitch of feed inlet (15) one end.

8. A twin-shaft screw conveyor as defined in claim 1, wherein: an observation cleaning port (29) is formed in the side wall of the receiving bin (11).

9. A twin-shaft screw conveyor as defined in claim 1, wherein: an exhaust port (30) is integrally formed at the top of the housing (13).