CN113682734A

CN113682734A - Pipe chain type conveyor and chain transmission device used by same

Info

Publication number: CN113682734A
Application number: CN202111092644.4A
Authority: CN
Inventors: 崔昆; 沈三平
Original assignee: Qinhuangdao Sea Food Co ltd
Current assignee: Qinhuangdao Sea Food Co ltd
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2021-11-23
Anticipated expiration: 2041-09-17
Also published as: CN113682734B

Abstract

The invention aims to solve the problems of high noise and easy generation of metal powder when the existing chain transmission device for the pipe chain conveying device is meshed, and provides a pipe chain conveyor and the used chain transmission device, wherein the chain transmission device comprises a conveying chain, a driving chain wheel and a driven chain wheel, the conveying chain is sleeved on the driving chain wheel and the driven chain wheel in a head-to-tail connection manner, the conveying chain comprises a ring chain and a chain piece, the driving chain wheel comprises a wheel body and a gear tooth, and the conveying chain and the driving chain wheel are meshed with the gear tooth through the chain piece; the driven chain wheel comprises an outer wheel ring, the outer circumferential surface of the outer wheel ring is provided with a chain sheet groove, the radial section of the chain sheet groove is in a circular arc shape, the diameter of the circular arc shape is matched with that of the outer circumference of a chain sheet, and the chain sheet is made of wear-resistant non-metallic materials; the pipe chain type conveyor comprises a conveying pipe, a chain transmission device and a driving device, wherein the conveying chain penetrates through the conveying pipe, the diameter of each chain piece is matched with the inner diameter of the conveying pipe, and the pipe chain type conveyor is low in noise and can avoid the situation that metal scraps pollute materials.

Description

Pipe chain type conveyor and chain transmission device used by same

Technical Field

The invention relates to the field of material conveying, in particular to a pipe chain type conveyor and a chain transmission device used by the same.

Background

A pipe chain type conveyer is a continuous conveyer for conveying powder, small particles, small blocks and other bulk materials, in a closed pipeline, a chain sheet is used as a transmission component to drive the materials to move along the pipeline, in order to enable the chain sheet to move in the pipeline, the chain sheet is generally fixed on an endless chain which is connected end to end, the chain is supported and driven by matching of at least one driving chain wheel and at least one driven chain wheel with the chain, and the chain is driven to move circularly by the rotation of the chain wheels. The chain ring is divided into a vertical chain ring and a horizontal chain ring according to the meshing posture for convenience, wherein the chain ring with the plane vertical to the axial direction of the chain wheel is the vertical chain ring, and the chain ring with the plane parallel to the axial direction of the chain wheel is the horizontal chain ring. There are two common forms of chain wheel adapted to the endless chain, the first one has a plurality of teeth with thinner end than root on its outer circumference, so that the end is thinner, when meshing, the thin end of the tooth is inserted into the ring of the transverse chain link, and the tooth and the transverse chain link mesh for transmission; the second chain wheel is characterized in that a groove is formed in the radial end face of each gear tooth along the circumferential direction of the chain wheel, a sub-groove is formed in each gear tooth, each sub-groove is a groove with two wide ends and a narrow middle, the width of the groove at the narrow part of the groove is smaller than that of a chain ring, a vertical chain link is vertically clamped at the narrow middle part of the groove during meshing, a transverse chain link is transversely clamped at the wide part of the groove, and the transverse chain link cannot pass through the narrow middle part of the groove, so that the end part of the transverse chain link is matched with the wide part of the groove to form meshing; when the two kinds of chain wheels are meshed with the ring chain, the wheel teeth are in direct contact with the ring chain, and the chain wheels and the ring chain are usually made of metal materials, so that noise generated by collision and friction between the metal chain wheels and the metal ring chain is high during transmission, and metal powder is easily generated by mutual friction and grinding of the wheel teeth and the ring chain of the chain wheels, so that conveyed materials are polluted.

Disclosure of Invention

The invention aims to provide a pipe chain type conveyor and a chain transmission device used by the same, aiming at the problems that the prior chain transmission device used for the pipe chain type conveyor has high noise and is easy to generate metal powder when being meshed.

The technical purpose of the invention is realized by the following technical scheme:

a chain transmission device for a pipe chain type conveyor comprises a conveying chain, a driving chain wheel and a driven chain wheel, wherein the conveying chain is sleeved on the driving chain wheel and the driven chain wheel in a head-to-tail connection mode and is supported by the driving chain wheel and the driven chain wheel; the driven chain wheel comprises a wheel body, the wheel body is provided with an outer wheel ring, the outer circumferential surface of the outer wheel ring is provided with a chain sheet groove, the chain sheet groove is annular and is arranged along the circumferential direction of the outer wheel ring, the radial section of the chain sheet groove is arc-shaped, the diameter of the chain sheet groove is matched with the diameter of the outer circumference of a chain sheet, the conveying chain is matched and movably connected with the chain sheet groove through the outer circumference of the chain sheet, and the diameter of the chain sheet is arranged along the diameter of the outer wheel ring when the chain sheet is matched with the outer wheel ring; the chain sheet is made of wear-resistant non-metallic materials.

Preferably, the distance between two adjacent chain sheets on the conveying chain is matched with the tooth pitch of the driving sprocket, and the thickness of each chain sheet is smaller than the minimum distance d1 between two adjacent gear teeth; the chain sheet is located between two adjacent teeth of the drive sprocket at the meshing position of the conveying chain and the drive sprocket, and the teeth of the drive sprocket are in contact with the axial surface of the chain sheet.

Preferably, the drive sprocket is provided with an annular groove along the outer circumference of the drive sprocket, the annular groove at least penetrates through each gear tooth along the circumferential direction of the drive sprocket, and the gear tooth is an arc-shaped tooth with a wide upper part and a narrow lower part; when the conveying chain is meshed with the driving chain wheel, the ring chain at the meshing position is positioned in the ring groove of the gear teeth.

Preferably, the wheel body of the driving chain comprises an outer wheel ring and two circular supporting plates I, the two supporting plates I are coaxial with the outer wheel ring, the circumferential surface of the supporting plate I is fixedly connected with the inner wall of the outer wheel ring, a gap is reserved between the two supporting plates I, a shaft hole boss is arranged at the center of the supporting plate I, a shaft hole is formed in the shaft hole boss, a lightening hole is formed in the supporting plate I, and the lightening holes are uniformly distributed in a circumferential manner by taking the axis of the supporting plate I as the center; the fixed a plurality of strengthening ribs that are provided with in the backup pad one, the axis that the strengthening rib all followed backup pad one radially sets up and used backup pad one distributes as the even circumference in center, and the strengthening rib is close to the one end of outer wheel ring and the inner peripheral surface fixed connection of foreign steamer ring, and the strengthening rib is rectangular shape, and the strengthening rib is provided with the rib with the one end that foreign steamer ring is connected, and the rib cross-sectional width is greater than the main part of strengthening rib, and the rib and strengthening rib junction cross-section crescent.

Preferably, the chain piece comprises a circular piece body, the edge of the piece body is of a round angle structure, two connecting holes penetrating through the chain piece are formed in the chain piece, the axes of the connecting holes are parallel to the axis of the piece body, and the midpoint of the vertical connecting line of the axes of the two connecting holes is positioned on the axis of the piece body; the two axial end faces of the sheet body are fixedly provided with contact bosses, the projections of the contact bosses on the two sides of the chain sheet on the axial end faces of the chain sheet are overlapped, the connecting hole is positioned on the contact bosses, and the height of the gear tooth of the driving sprocket is larger than the minimum distance from the edge of the contact boss to the edge of the chain sheet; when the conveying chain is meshed with the driving chain wheel, the gear teeth of the driving chain wheel are contacted with the contact lug boss; the contact boss is oblong, the two connecting holes are respectively coaxial with the two axes of the contact boss, the end face of the contact boss is provided with a abdicating groove, the abdicating groove is arranged between the two connecting holes, the two connecting holes are symmetrical about the central line of the length direction of the abdicating groove, the cross section of the abdicating groove is arc-shaped, and the wear-resistant non-metallic material is plastic, nylon or tetrafluoroethylene.

Preferably, the wheel body of the driven sprocket further comprises a second support plate, the second support plate is coaxial with the outer wheel ring and is fixedly connected with the inner circumferential surface of the outer wheel ring, and the geometric center of the second support plate is superposed with the geometric center of the outer wheel ring; a shaft hole coaxial with the outer wheel ring is formed in the center of the second support plate; a cylindrical shaft platform coaxial with the outer wheel ring is fixedly arranged on the second support plate, the shaft hole is formed in the shaft platform, and the chain sheet groove is movably connected with the chain in a static fit manner; the chain sheet is made of food grade nylon.

The pipe chain type conveyor comprises a conveying pipe, a chain transmission device and a driving device for driving the chain transmission device to move, wherein a conveying chain of the chain transmission device penetrates through the conveying pipe, a feeding hole and a discharging hole are formed in the conveying pipe, the chain transmission device is adopted, the diameter of a chain piece of the chain transmission device is matched with the inner diameter of the conveying pipe, the conveying chain moves in the conveying pipe under the driving of the driving chain transmission device, and the central line of the chain piece and the central line of the conveying pipe are arranged in the same line or the same direction.

Preferably, a sprocket box is arranged at the driven sprocket, the sprocket box comprises a wheel body accommodating part and a chain body accommodating part, the wheel body accommodating part is provided with an inner cavity in the shape of a flat cylinder, the driven sprocket is rotationally arranged in the inner cavity of the wheel body accommodating part through a shaft hole of the driven sprocket, the driven chain wheel is coaxial with the inner cavity of the wheel body accommodating part, the chain body accommodating part at least comprises an arc-shaped bent pipe section which is arranged along the outer circumference of the wheel body accommodating part, the wheel body accommodating part is coaxial with the wheel body accommodating part and is intersected and communicated with the wheel body accommodating part, a tubular channel is formed between the groove wall of a chain sheet groove of the driven chain wheel and the inner wall of an arc-shaped bent pipe section of the chain body accommodating part, the diameter of the cross section of the tubular channel is matched with that of the sheet body, two ends of the arc-shaped bent pipe section are respectively in tangent connection with conveying pipes at corresponding ends, and the conveying chain enters the chain body accommodating part from the upper conveying pipe and then enters the lower conveying pipe to complete reversing; and straight pipe-shaped connecting parts extending along the tangential direction of the wheel body accommodating part are arranged at the two ends of the chain body accommodating part and are butted with the conveying pipe through the connecting parts.

Preferably, discharge chutes are arranged on the axial end faces of two sides of the outer ring of the driven sprocket, and the discharge chutes penetrate through the inner and outer circumferential walls of the outer ring and are communicated with the chain sheet grooves; each axial end face of the outer wheel ring is provided with at least two discharge chutes, the discharge chutes on the same axial end face are uniformly distributed on the circumference by taking the shaft hole as the center, guide edges with the same number as the discharge chutes are fixedly arranged on the axial end face of the support plate II, the guide edges are in one-to-one correspondence with the discharge chutes, the guide edges are arc-shaped, the end faces of the guide edges far away from the support plate II are flush with the axial end face of the outer wheel ring, one ends of the guide edges are tangent to the outer circumferential face of the shaft platform, the other ends of the guide edges are fixedly connected with the outer wheel ring and are close to the corresponding discharge chutes, the discharge chutes are positioned on one side of the arc-shaped convex edges of the corresponding guide edges, the guide edges on the same side of the support plate II are symmetrical about the center of the shaft hole, the support plate II is provided with a weight removing hole, a weight removing hole is arranged between any two adjacent guide edges on the same side of the support plate II, the weight removing hole is a rounded triangle, and three edges of the triangle are arc-shaped, and are respectively parallel to the adjacent outer wheel ring edge or the material guiding edge.

The better still includes the dust proof box drive sprocket rotates and sets up in the dust proof box, and drive arrangement sets up still includes the blanking box in the dust proof box, and the blanking box setting is in the top of the feed inlet of conveyer pipe, the bottom of blanking box is provided with ejection of compact mouth, ejection of compact mouth with the sealed intercommunication of feed inlet.

The invention has the following beneficial effects:

the chain transmission device comprises a conveying chain, a driving chain wheel and a driven chain wheel. The conveying chain comprises a ring chain and chain pieces, and the chain pieces are perpendicular to the length direction of the ring chain and are uniformly distributed along the length direction of the ring chain. The driving chain wheel comprises a wheel body and wheel teeth arranged on the circumference of the wheel body. At drive sprocket and chain piece meshing department, the chain piece is located between two adjacent teeth of a cogwheel of drive sprocket, and the teeth of a cogwheel of drive sprocket and the axial surface contact of chain piece, when drive sprocket rotates, the axial surface through the teeth of a cogwheel promotion chain piece makes the chain piece remove, can avoid endless chain and teeth of a cogwheel direct contact like this, because the chain piece generally adopts non-metallic material to make, consequently by the teeth of a cogwheel and the contact of chain piece, can avoid metallic material's structure collision, thereby the noise reduction, avoid producing the metal piece contaminated material.

The pipe chain conveyor adopts the chain transmission device, so that the noise is low, and the condition that metal scraps pollute materials can be avoided. In addition, the conveying chain adopts an endless chain structure compared with a rope or belt-shaped structure, so that the endless chain has better flexibility and is convenient to maintain a straight state, when the conveying chain is used for a pipe chain type conveyor, the resistance required to be overcome when the conveying chain is turned is small, and the chain piece is helped to maintain a state perpendicular to the length direction of the conveying pipe in the conveying pipe.

Drawings

FIG. 1 is a schematic structural view of an embodiment of the chain drive of the present invention;

FIG. 2 is a partial schematic view of an embodiment of the conveyor chain of the present invention;

FIG. 3 is a schematic structural view of an embodiment of a chain link of the chain drive of the present invention;

FIG. 4 is a schematic structural view of a drive sprocket embodiment of the chain drive of the present invention;

FIG. 5 is a schematic radial cross-sectional view of the drive sprocket of the configuration of the embodiment of the present invention illustrated in FIG. 4;

FIG. 6 is a partial schematic view of the engagement of the drive sprocket and the conveyor chain of the present invention;

FIG. 7 is a schematic structural view of an embodiment of the driven sprocket of the present invention;

FIG. 8 is an exploded schematic view of the driven sprocket and sprocket cassette position configuration of the present invention wherein the driven sprocket engages the conveyor chain;

FIG. 9 is a schematic view of the sprocket cassette of the present invention connected to a delivery tube;

fig. 10 is a schematic structural view of an embodiment of the pipe chain conveyor of the present invention.

The description of the reference numerals,

10. a conveyor chain; 11. a first chain ring; 111. an arc-shaped section; 112. a middle section; 12. a second chain ring; 13. a chain sheet; 131. a sheet body; 132. contacting the boss; 133. connecting holes; 134. a groove;

20. a drive sprocket; 21. a wheel body; 211. an outer race; 212. a first support plate; 213. a shaft hole boss; 214. reinforcing ribs; 215. a reinforcing portion; 216. lightening holes; 22. gear teeth; 221. a tooth dividing part; 23. an annular groove;

30. a driven sprocket; 31. an outer race; 32. a second support plate; 33. a chain sheet groove; 34. a discharge chute; 35. a material guiding edge; 36. lightening holes; 37. a pillow block; 38. a shaft hole;

50. a sprocket cassette; 51. a wheel body accommodating portion; 52. a chain body accommodating portion; 53. a connecting portion; 531. a body portion; 532. a half pipe section; 54. a first box body; 55. a second box body; 56. a connecting edge; 57. a circular arc-shaped bent pipe section;

40. a delivery pipe; 41. a feed inlet;

60. a blanking box; 61. a discharging nozzle;

70. dust-proof box.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. In the technical scheme of the invention, the conveying chain is a flexible chain, so that an ideal posture is difficult to maintain in the transmission process, and the position and the posture of the chain piece in the scheme of the invention are in an ideal state, the design concept of the invention is embodied, the position and the posture of the chain piece can be changed in the actual use process, and the situation after the posture is changed is not described in the technical scheme of the invention.

A chain transmission device, as shown in FIG. 1, includes a conveying chain 10, a driving sprocket 20, a driven sprocket 30 and a driving device (not shown) for driving the driving sprocket 20 to rotate. The conveyor chain 10 is endless and supported by at least one drive sprocket 20 and at least one driven sprocket 30, the conveyor chain 10 being held in tension. As shown in fig. 2, the conveying chain 10 includes a chain link and a chain sheet 13, the chain link is composed of a chain link first 11 and a chain link second 12 which are alternatively arranged and buckled with each other, the chain link first 11 and the chain link second 12 are both long circular rings, the middle section 112 of the ring can be two parallel straight parts or two oppositely or forwardly arranged cylinders, the two ends of the ring are arc sections 111 connecting the two middle sections, the arc sections at the two ends are oppositely arranged outwards, each chain link first 11 is provided with a circular chain sheet 13, the end surface of the chain sheet 13 is vertically connected with the middle section of the chain link first, the middle section of the chain link first penetrates through the end surfaces at the two sides of the chain sheet to enable the arc sections at the two sides of the chain link first to be respectively arranged at the two sides of the chain sheet, the transverse central line of the chain link first is collinear with the axis of the chain sheet, the structure can be realized by arranging connecting holes 133 matched with the middle section of the chain link first on the end surface of the chain sheet 13, the axes of the two connecting holes 133 are respectively parallel with the axis of the sheet body 131, the two connecting holes are symmetrically arranged relative to the axis of the chain sheet, the middle section of the first chain link 11 penetrates through the chain sheet 13 from the connecting hole 133, the axis of the chain sheet 13 is overlapped with the central line of the first chain link 11 in the length direction, the chain sheet 13 is arranged at the same position of each first chain link 11, the chain sheets 13 are uniformly distributed in the length direction of the whole chain, and the distance between every two adjacent chain sheets 13 is the pitch of the conveying chain 10. The driving sprocket 20 comprises a wheel body 21 and teeth 22 arranged on the circumference of the wheel body 21, as shown in fig. 6, the minimum distance d1 between two adjacent teeth 22 is larger than the thickness of the chain sheet 13, and the pitch d2 of the driving sprocket 20 is adapted to the pitch of the conveying chain 10. The driving sprocket 20 and the conveying chain 10 are engaged with the chain pieces 13 through the teeth 22, as shown in fig. 1 and 6, at the engagement, the chain pieces 13 are positioned between two adjacent teeth 22 of the driving sprocket 20, and at least one tooth 22 of the driving sprocket 20 is in contact with the axial surface of the chain piece 13, the circumferential surface of the chain piece 13 is in contact with the outer circumferential surface of the body 21 of the driving sprocket 20, the circumferential surface of the chain piece 13 is supported by the outer circumferential surface of the body 21 so as to support the endless chain, so that the endless chain is not in contact with the outer circumferential surface of the body of the driving sprocket 20 at the engagement, and when the driving sprocket 20 rotates, the conveying chain 10 is moved forward by pushing the axial surface of the chain piece 13 through the teeth 22. Because the driving sprocket 20 only contacts with the chain piece 13 when meshing, and the chain piece 13 can adopt non-metallic material to make, consequently the phenomenon of collision, friction between the teeth of a cogwheel of metal material and the endless chain of metal material can not appear, and the noise of production is less, also can not produce because of mutual grinding between metal sprocket and the metal endless chain, has avoided the production of metal powder and piece, prevents metal powder and piece pollution material. In addition, the endless chain has better flexibility and certain rigidity compared with a rope or belt-shaped structure, and belongs to a rigid-flexible combined chain, when the conveying chain 10 is used for a pipe chain conveying device, the conveying chain 10 is easy to change directions when turning due to the flexibility of the conveying chain, the resistance required to overcome is small, and the rigidity helps to keep the chain sheet 13 in a state perpendicular to the length direction of the conveying pipe 40 in the conveying pipe.

Preferably, as shown in fig. 2 and 3, contact bosses 132 are respectively provided on both axial end surfaces of the plate body 131 of the chain link 13, the contact bosses 132 are preferably provided centering on the center of the axial end surfaces of the plate body 131, and the connection hole 133 of the chain link 13 is located on the contact bosses 132. The axes of the two connecting holes 133 are parallel to the axis of the sheet body 131, the midpoint of the vertical connecting line of the axes of the two connecting holes 133 is positioned on the axis of the sheet body 131, and the central line of the chain link in the length direction is superposed with the axis of the chain sheet, so that the conveying chain 11 has better central symmetry. As shown in fig. 1 and 6, the height H1 of the teeth of the driving sprocket is greater than the minimum distance H2 from the edge of the contact boss to the edge of the chain piece, so that when the conveying chain 10 is engaged with the driving sprocket 20, the teeth 22 are in contact with the contact boss 132 for transmission, the sheet body 131 is not in direct contact with the teeth 22, the edge part of the chain piece 13 in contact with the conveying pipe is not worn during transmission, the phenomenon of material leakage caused by gaps between the edge of the sheet body 131 and the pipe wall of the conveying pipe 10 after being worn is prevented, the service life of the chain piece 13 is prolonged, and the maintenance amount of equipment is reduced. In addition, the contact boss 132 can increase the thickness of the center of the chain piece 13, so that the contact area between the chain piece 13 and the chain ring one 11 is increased, the connection between the chain ring one 11 and the chain piece 13 is more stable, the chain piece 13 is not easy to shift on the chain, and the conveying chain 10 is not easy to deform. In order to make conveyor chain 10 and chain flight 13 less susceptible to jamming during the transfer tube turn, the edges of flight 131 are preferably rounded. Preferably, the projections of the contact bosses 132 on the two sides of the chain sheet 13 on the axial end faces of the chain sheet 13 are overlapped, so that the contact condition of the chain wheel 20 and the chain sheet 13 is the same when the chain reciprocates, the chain is non-directional, and the use and installation are convenient. The contact boss 132 can be arranged to be in an oblong shape, the length direction of the contact boss 132 is consistent with the width direction of the first chain ring 11, the two connecting holes 133 are respectively coaxial with the two axes on the contact boss 132, and the oblong structure can be well adapted to the flat shape of the first chain ring 11. In order to ensure that the second chain ring 12 can have a sufficient installation space, it is preferable that the end surface of the contact boss 132 is provided with a yielding groove 134, the yielding groove 134 is arranged between the two connection holes 133, the length direction of the yielding groove 134 is perpendicular to the length direction of the contact boss 132, the two connection holes 133 are symmetrically arranged on two sides of the yielding groove 134, and the cross section of the yielding groove 134 is in an arc shape so as to be better adapted to the shape of the chain ring. The chain sheet 13 can be made of nylon material, meanwhile, the nylon material is helpful for reducing noise generated when the driving sprocket 20 is contacted with the chain sheet 13, metal scraps cannot be generated to pollute materials, and in addition, the nylon material has self-lubricating property, so that the resistance of the chain sheet 13 in the conveying pipe can be reduced; the chain pieces 13 are preferably made of food-grade nylon, so that the conveying chain can be used for conveying food powder, and the sanitation of the conveyed food materials is guaranteed. Since the pitch between two adjacent links 13 is determined by the sum of the pitches of the first links 11 and the second links 12, when the distance between the adjacent links 13 is fixed, the smaller the pitch of the first links 11, the larger the pitch of the second links 12, and in order to facilitate the installation of the links 13 on the first links 11, it is preferable to arrange the first links 11 shorter, so that the pitch of the first links 11 is preferably smaller than the pitch of the second links 12.

Preferably, as shown in fig. 4 and 5, an annular groove 23 is formed on the driving sprocket 20 to surround the outer circumference of the driving sprocket 20, the annular groove penetrates through each gear tooth 22 along the circumferential direction of the driving sprocket 20, each gear tooth 22 is divided into left and right partial teeth 221, the bottom wall of the annular groove 23 may be lower than the tooth root of the gear tooth 22, higher than the tooth root of the gear tooth 22, or flush with the tooth root of the gear tooth 22, in the embodiment of fig. 4, the bottom wall of the annular groove 23 is flush with the tooth root of the gear tooth 22, the widths of the first chain ring and the second chain ring are both smaller than the width of the annular groove 23, so that a ring chain can enter the annular groove 23, and the diameter of the chain piece 13 is larger than the width of the annular groove 23, so that the chain piece 13 cannot pass through the annular groove 23 on the gear tooth. By adopting the structure, at the meshing position of the driving sprocket and the conveying chain, the two tooth dividing parts 221 of the gear teeth are simultaneously contacted with the chain sheet 13, the chain sheet 13 is contacted with the two tooth dividing parts 221 of the gear teeth 22, and the two contact positions are respectively positioned at the two sides of the chain sheet 13, so that compared with the condition that the chain sheet 13 only transmits power by a single contact point, the chain sheet 13 is not easy to skew, and the posture of the chain sheet 13 is kept stable in the transmission process. As shown in fig. 6, the gear teeth 22 of the driving sprocket are preferably arc-shaped teeth with a wide top and a narrow bottom, the width b of the tooth root of the gear teeth 22 is smaller than the width a of the tooth crest, the arc-shaped teeth can be of a trapezoidal structure, the bottom of the trapezoid is the tooth crest, and such a tooth-shaped structure that two bottom corners of the trapezoid are rounded off is beneficial to enabling the chain piece 13 to be always in contact with the arc surface on the gear teeth 22 in the process of meshing rotation, so that the possibility of the driving sprocket 20 and the conveying chain 10 being stuck can be reduced, and meanwhile, the abrasion of the gear teeth 22 to the chain piece 13 can be reduced. In order to reduce the weight of the driving sprocket 20, as shown in fig. 4 and 5, it is preferable that the structure of the wheel body 21 includes an outer ring 211 and two circular support plates one 212, the two support plates one 212 and the outer ring 211 are coaxial, a gap is formed between the two support plates one 212, the circumferential surfaces of the support plates one 212 are fixedly connected with the inner wall of the outer ring 211, the support plates one 212 are provided with shaft holes, the support plates one 212 can be further provided with lightening holes 216, and the lightening holes 216 are preferably provided with a plurality of holes which are uniformly distributed circumferentially around the axis of the support plates one 212 to ensure that the center of gravity of the driving sprocket 20 is located at the center of the wheel. A plurality of reinforcing ribs 214 can be fixedly arranged on the first support plate 212, the reinforcing ribs 214 are all arranged along the radial direction of the first support plate 212 and are uniformly distributed on the circumference by taking the axis of the first support plate 212 as the center, one end of each reinforcing rib 214 close to the outer wheel ring 211 is fixedly connected with the inner circumferential surface of the outer wheel ring 211, preferably, the reinforcing ribs 214 are arranged between two adjacent lightening holes 216, and each reinforcing rib 214 is in a long strip shape. As shown in fig. 1, the reinforcing part 215 is provided at one end of the reinforcing rib 214 connected with the outer wheel ring 211, the section width of the reinforcing part 215 is larger than that of the main body of the reinforcing rib, the sections of the main body parts of the reinforcing rib are the same, and the section of the reinforcing part 213 is gradually increased from the connection part with the main body of the reinforcing rib, so that the supporting effect on the outer wheel ring 211 can be enhanced. In order to increase the length of the shaft hole and ensure the stability of the driving sprocket 20 on the rotating shaft, a shaft hole boss 213 may be provided at the center of the support plate one 212, and the shaft hole is opened on the shaft hole boss 213. Such a drive sprocket 20 can also be used as a driven sprocket. The driving device may be a motor, a rotary cylinder, or other driving device, as long as the driving device can drive the driving sprocket 20 to rotate.

Note that, the structure of the driven sprocket 30 and the engagement with the conveying chain 10 may be the same as or different from the driving sprocket 20, and when the driven sprocket 30 is different from the driving sprocket 20, the following structure is preferably adopted: as shown in fig. 7 and 8, the driven sprocket 30 includes an outer ring 31 and a second circular support plate 32, and the second circular support plate 32 is coaxial with the outer ring 31 and fixedly connected to the inner circumferential surface of the outer ring 31. The geometric center of the second support plate 32 coincides with the geometric center of the outer wheel ring 31. The outer circumferential surface of the outer ring 31 is provided with a chain sheet groove 33 along the circumference of the outer ring, the radial section of the chain sheet groove 33 is arc-shaped, the diameter of the arc of the chain sheet groove 33 is matched with the diameter of the chain sheet 13, and the chain sheet 13 is positioned in the chain sheet groove 33 and is connected with the chain sheet groove through friction transmission in a matching way. In the process of the matched transmission of the driven sprocket 30 and the conveying chain 10, the chain sheet 13 approaches the outer wheel ring 31 along the tangential direction of the outer wheel ring 31 until the chain sheet 13 is contacted with the groove wall of the chain sheet groove 33, the driven sprocket 30 is driven to rotate by the friction force between the chain sheet 13 and the groove wall of the chain sheet groove 33 during the transmission, the chain sheet 13 supports the chain in the process, the driven sprocket supports the chain sheet, the chain is enabled not to be contacted with the driven sprocket 30 all the time, and the chain sheet and the driven sprocket cannot be abraded mutually; because the chain sheet 13 is contacted with the outer wheel ring along the tangential direction of the outer wheel ring 31, the collision between the chain sheet 13 and the outer wheel ring 31 is gentle, and the chain sheet 13 is usually made of relatively soft materials such as plastics, nylon and the like, the noise generated by the contact of the conveying chain 10 and the driven chain wheel 30 is relatively small; because the driven chain wheel 30 is not in contact with the endless chain, metal chips cannot be generated in the transmission process, and material pollution cannot be caused by the metal chips. The center of the second support plate 32 is provided with a shaft hole 38 for connecting a rotating shaft, the shaft hole 38 is coaxial with the outer wheel ring 31, the second support plate 32 is preferably fixedly provided with a cylindrical pillow block 37 coaxial with the outer wheel ring 31, and the shaft hole 38 is formed in the pillow block 37, so that the length of the shaft hole 38 is not limited by the thickness of the second support plate 32, the thickness of the second support plate 32 can be reduced while the length of the shaft hole 38 is ensured, and the weight of the driven sprocket 30 is reduced. The driven sprocket having the chain piece grooves formed on the circumference thereof is referred to as a groove-shaped driven sprocket. The driven sprocket adopting the structure of the invention has the advantages that the outer wheel ring is provided with the chain sheet groove, when the conveying chain is matched with the driven sprocket, the chain sheet is arranged along the radial direction of the driven sprocket, an internally tangent matching structure is formed between the chain sheet and the chain sheet groove, when the conveying chain moves, friction force is generated between the sheet body and the chain sheet groove, when the friction force is larger than the driving force for rotating the driven sprocket, the driven sprocket rotates and rotates together with the sheet body, so that relative displacement is not generated between the sheet body and the driven sprocket, the driven sprocket drives the sheet body to turn together to complete reversing, therefore, when the conveying chain reverses on the driven sprocket, the phenomenon of clamping is not easy to generate, the abrasion between the driven sprocket and the sheet body is small, and pollutants are not easy to generate. When the friction force between the driven sprocket and the chain piece is smaller than the driving force of the rotation of the driven sprocket, the driven sprocket slides relative to the chain piece, the driven sprocket is not moved, and the support and the guide are provided only when the conveying chain turns.

A pipe chain conveyor comprises a conveying pipe 40 and a chain transmission device as described above, and as shown in fig. 10, the structure of a driven sprocket is the same as that of a driving sprocket, and the driven sprocket preferably adopts a groove-shaped driven sprocket structure. Wherein the conveying chain of the chain drive passes through the conveying pipe 40, and the number and the positions of the driven chain wheels in the chain rotating device are set according to the pre-planned conveying path, so that the conveying chain runs according to the conveying path. The conveying pipe 40 is an equal-diameter pipe, the inner diameter of the conveying pipe 40 is matched with the diameter of the chain sheet 13, a feeding hole 41 and a discharging hole are formed in the pipe wall of the conveying pipe 40, the feeding hole 41 is preferably formed upwards so that materials can enter the conveying pipe 40 through self weight, and therefore the part, provided with the feeding hole 41, of the conveying pipe 40 is preferably horizontally arranged. The blanking box 60 can be arranged above the feeding hole 41, an inlet is formed in the blanking box 60, the funnel-shaped discharging nozzle 61 is arranged at the bottom of the blanking box 60, and the discharging nozzle 61 is communicated with the feeding hole 41 in a sealing mode so as to feed materials into the feeding hole 41. As shown in fig. 8 and 9, a sprocket cassette 50 accommodating the driven sprocket 30 is provided at the driven sprocket. The sprocket cassette 50 includes a wheel housing portion 51 and a chain housing portion 52, wherein the wheel housing portion 51 is used for housing the driven sprocket 30, and the chain housing portion 52 is used for the conveying chain 10 to pass through and interface with the conveying pipeline. The wheel receiving portion 51 has an inner cavity, and the driven sprocket is rotatably disposed in the inner cavity of the wheel receiving portion, the inner cavity is preferably a cylindrical box body, the inner diameter of the inner cavity is matched with the diameter of the driven sprocket 30, and the driven sprocket 30 is coaxial with the wheel receiving portion 51 and is rotatably connected in the wheel receiving portion 51 through the shaft hole 38. The chain body accommodating part 52 at least comprises an arc-shaped bent pipe section 57, the arc-shaped bent pipe section is arranged along the outer circumference of the wheel body accommodating part 51, is coaxial with the wheel body accommodating part and is intersected with and communicated with the wheel body accommodating part, the diameter of the cross section of the chain body accommodating part 52 is matched with that of the sheet body 131, a tubular passage is formed between the groove wall of the chain sheet groove 33 of the driven chain wheel 30 and the inner wall of the arc-shaped bent pipe section of the chain body accommodating part 30, the diameter of the tubular passage is matched with that of the chain sheet 13, the tubular passage is movably matched and connected with the chain sheet 13, two ends of the chain body accommodating part are respectively butted with conveying pipes at corresponding ends, the conveying chain 10 enters the chain body accommodating part 52 after coming out of the conveying pipes, penetrates through the chain body accommodating part and then enters the conveying pipes, the sheet body 131 enters the chain body accommodating part along the radial direction of the driven chain wheel, and the sheet body is vertically matched with the tubular passage through the circumference when the conveying chain body 10 passes through the chain body accommodating part, the endless chain is supported by the plate body, and only the plate body is in contact with the chain plate groove of the driven sprocket 30, and the endless chain is not in contact with the driven sprocket. Adopt the sprocket box of above-mentioned structure, when conveying chain 10 walked around driven sprocket 30, retrained the material through the structure of tubular passageway, can prevent effectively that the material from dropping from driven chain when driven sprocket, avoided external pollutant to be infected with driven sprocket 30, helped keeping the material and carry the health. Preferably, straight pipe-shaped connecting portions 53 extending tangentially along the wheel body accommodating portion 51 are provided at both ends of the chain body accommodating portion 52, the connecting portions 53 are adapted to be abutted against the conveying pipe 40, the inner diameter of the connecting portions 53 is adapted to the outer diameter of the conveying pipe 40, and the tip of the conveying pipe 40 can be disposed inside the connecting portions 53 or outside the connecting portions 52. In order to facilitate the installation of the sprocket box 50, the sprocket box 50 can be designed to be a split structure, the sprocket box 50 is divided into a first box body 54 and a second box body 55, the end surfaces of the first box body 54 and the second box body 55, which are opposite to each other, are perpendicular to the axis of the wheel body accommodating part, the first box body 54 and the second box body 55 are opposite to each other to form the complete sprocket box 50, connecting edges 56 are arranged at the edges of the first box body 54 and the second box body 55, the first box body 54 is in butt joint with the second box body 55, and the connecting edges 56 of the two box bodies are connected through bolts, so that the first box body 54 and the second box body 55 are fixedly connected. To further facilitate the fixing of the delivery pipe 40, the connecting portion 53 of the first case 54 may be provided as a separate structure divided into a half pipe portion 532 and a main body portion 531 integrally provided with the chain body accommodating portion 52, and the half pipe portion 532 clamps the delivery pipe 40 opposite to the connecting portion 53 of the second case 55, so that the delivery pipe 40 is fixed opposite to the connecting portion 53. Usually, the diameter of the inner cavity of the wheel body accommodating part is slightly larger than the outer diameter of the driven wheel, and the distance between the two end faces of the wheel body accommodating part is slightly larger than the thickness of the driven wheel, so that a certain gap is formed between the outer circumference and the two end faces of the driven wheel and the inner cavity of the wheel body accommodating part, the gap is preferably enough to enable the driven wheel to freely rotate, and is not too large, generally within 0.2-3mm, so that the driven wheel can rotate in the chain wheel box conveniently, and the gap between the driven chain wheel and the inner cavity of the wheel body accommodating part is not too large. Since there is a gap between the inner sidewall of the wheel body accommodating portion 51 of the sprocket box and the end surface of the outer wheel ring 31, material may enter the space formed between the supporting plate 32 and the inner wall of the wheel body accommodating portion 51 through the gap, and in order to guide the material in the space out, the discharge chute 34 and the guide edge 35 may be disposed on the driven sprocket 30. As shown in fig. 7, the discharge chutes 34 are disposed on the axial end surfaces of both sides of the outer wheel ring 31, the discharge chutes 34 penetrate through the inner and outer circumferential walls of the outer wheel ring 31, and the discharge chutes 34 are communicated with the chain sheet grooves 33, at least two discharge chutes 34 are disposed on each axial end surface of the outer wheel ring 31, and the discharge chutes 34 disposed on the same axial end surface are uniformly circumferentially distributed by taking the shaft hole 38 as a center, in this embodiment, four discharge chutes 34 are disposed on each axial end surface of the outer wheel ring 31. The material guiding edge 35 is an arc-shaped convex edge, the material guiding edge 35 is fixedly arranged on the axial end face of the second support plate 32, the end face, far away from the second support plate 32, of the material guiding edge 35 is flush with the axial end face of the outer wheel ring 31, one end of the material guiding edge 35 is tangent to the outer circumferential face of the pillow block 37, and the other end of the material guiding edge is fixedly connected with the outer wheel ring 31. The material guide edges 35 are consistent with the material discharge grooves 34 in number, each material guide edge 35 corresponds to one material discharge groove 34, one end of each material guide edge 35, which is connected with the outer wheel ring 31, is close to the corresponding material discharge groove 34, the material guide edges are the same in shape and size, the material discharge grooves 34 are located on the outer sides of the corresponding material guide edges 35 in an arc shape, the material guide edges 35 rotate around the shaft hole 38 and can be coincided with any material guide edges 35 located on the same axial end face of the second support plate 32, and the material guide edges located on the same axial end face of the second support plate 32 are evenly distributed around the shaft hole, so that the coincidence of the gravity center of the driven sprocket 30 and the geometric center of the driven sprocket 30 is ensured. When the driven sprocket 30 rotates, the guide edge 35 passes through the material between the second support plate and the inner wall of the sprocket accommodating part, the guide edge 35 pushes the material falling in the sprocket accommodating part to move, in the process that the material is pushed by the guide edge 35, the material moves along the convex surface of the guide edge 35 towards the direction of the outer wheel ring 31 under the guiding action of the guide edge 35 arc-shaped structure until the material moves to the discharge chute 34 and enters the chain sheet groove 33 from the discharge chute 34, and the material entering the chain sheet groove 33 can be taken away by the chain sheet 13. The discharge chutes 34 and the guide edges 35 on the two sides of the second support plate 32 are mirror-symmetrical with respect to the second support plate 32, so that the symmetry of the driven sprocket 30 can be improved. In order to further reduce the weight of the driven sprocket 30, a weight removing hole 36 may be formed in the second support plate 32, and in order to improve the symmetry of the driven sprocket 30, one weight removing hole 36 may be formed between any two adjacent material guiding edges 35 located on the same side of the second support plate 32. The weight-removing holes 36 are preferably configured as rounded triangles, three sides of each triangle are arc-shaped and are respectively parallel to the edge of the adjacent outer wheel ring 31 or the material guiding edge 35, so that the shape of the weight-removing holes 36 is similar to the shape of a triangular area enclosed between the material guiding edge 35 and the outer wheel ring, and the size of the weight-removing holes 36 is increased. By adopting the chain wheel combination structure, when the conveying chain is reversed on the driven chain wheel, the arc-shaped pipe-shaped channel is formed by the arc-shaped bent pipe and the outer circumferential surface of the driven chain wheel, and the driven chain wheel and the conveying chain move together without a chain sheet pushing the materials to move, so that the materials are not easy to fall on the inner walls of the chain sheet and the pipe-shaped channel, and the loss of the materials is small.

It is preferable to provide a dust box 70, and to arrange the driving sprocket 40 and the driving device in the dust box 70, so as to prevent the impurities and moisture in the surrounding environment from adhering to the driving sprocket 40, and reduce the contact of the impurities and the moisture with the material, the driving sprocket 40 is rotatably connected to the dust box 70 by a rotating shaft, and the driving sprocket 40 is supported by the side wall of the dust box 70.

The specific examples are merely illustrative of the invention and are not intended to be limiting.

Claims

1. The utility model provides a chain drive that pipe chain conveyor used, includes conveying chain (10), drive sprocket (20) and driven sprocket (30), and the cover is established on drive sprocket (20) and driven sprocket (30) to conveying chain (10) end to end, is supported by drive sprocket (20) and driven sprocket (30), its characterized in that: the conveying chain (10) comprises a ring chain and chain pieces (13) fixedly connected to the ring chain, the chain pieces (13) are arranged in a plurality and are uniformly arranged along the length direction of the ring chain, the driving chain wheel (20) comprises a wheel body (21) and gear teeth (22) arranged on the circumference of the wheel body (21), and the conveying chain (10) and the driving chain wheel (20) are meshed with the gear teeth (22) through the chain pieces (13); the driven chain wheel (30) comprises a wheel body, the wheel body is provided with an outer wheel ring (31), the outer circumferential surface of the outer wheel ring (31) is provided with a chain sheet groove (33), the chain sheet groove (33) is annular and is arranged along the circumferential direction of the outer wheel ring (31), the radial section of the chain sheet groove (33) is arc-shaped, the diameter of the chain sheet groove is matched with the diameter of the outer circumference of a chain sheet (13), the conveying chain (10) is matched and movably connected with the chain sheet groove (33) through the outer circumference of the chain sheet (13), and the diameter of the chain sheet is arranged along the diameter of the outer wheel ring when the chain sheet is matched with the outer wheel ring; the chain sheet is made of wear-resistant non-metallic materials.

2. The chain transmission device for a pipe chain conveyor according to claim 1, wherein: the distance between two adjacent chain sheets (13) on the conveying chain (10) is matched with the tooth pitch of the driving chain wheel (20), and the thickness of each chain sheet (13) is smaller than the minimum distance d1 between two adjacent gear teeth (22); the chain sheet (13) is positioned between two adjacent gear teeth (22) of the driving chain wheel (20) at the meshing part of the conveying chain (10) and the driving chain wheel (20), and the gear teeth (22) of the driving chain wheel (20) are in contact with the axial surface of the chain sheet (13).

3. The chain transmission device for a pipe chain conveyor according to claim 1 or 2, characterized in that: an annular groove (23) is formed in the driving chain wheel (20) along the outer circumference of the driving chain wheel (20), the annular groove (23) at least penetrates through each gear tooth (22) along the circumferential direction of the driving chain wheel (20), and the gear teeth (22) are arc-shaped teeth with wide upper parts and narrow lower parts; when the conveying chain (10) is meshed with the driving chain wheel (20), the ring chain at the meshing part is positioned in the ring groove (23) of the gear teeth.

4. The chain transmission device for a pipe chain conveyor according to claim 2, wherein: the wheel body (21) of the driving chain comprises an outer wheel ring (211) and two circular support plates I (212), the two support plates I (212) are coaxial with the outer wheel ring (211), the circumferential surface of the support plates I (212) is fixedly connected with the inner wall of the outer wheel ring (211), a gap is reserved between the two support plates I (212), a shaft hole boss (213) is arranged at the center of the support plates I (212), a shaft hole is formed in the shaft hole boss (213), a lightening hole (216) is formed in the support plates I (212), and the lightening holes (216) are uniformly distributed in a circumferential mode by taking the axis of the support plates I (212) as the center; the fixed a plurality of strengthening ribs (214) that are provided with on the backup pad (212), strengthening rib (214) all along the radial setting of backup pad (212) and use the axis of backup pad (212) to distribute as the even circumference in center, strengthening rib (214) are close to the one end of outer wheel ring (211) and the inner peripheral surface fixed connection of outer wheel ring (211), strengthening rib (214) are rectangular shape, strengthening rib (214) are provided with rib (215) with the one end that outer wheel ring (211) is connected, rib (215) cross-sectional width is greater than the main part of strengthening rib (214), rib (215) and strengthening rib junction cross-section crescent.

5. The chain transmission device for a pipe chain conveyor according to claim 1, wherein: the chain sheet (13) comprises a circular sheet body (131), the edge of the sheet body (13) is of a fillet structure, two connecting holes (133) penetrating through the chain sheet (13) are formed in the chain sheet (13), the axis of each connecting hole (133) is parallel to the axis of the sheet body (131), and the midpoint of the vertical connecting line of the axes of the two connecting holes (133) is positioned on the axis of the sheet body (131); the two axial end faces of the sheet body (131) are fixedly provided with contact bosses (132), the projections of the contact bosses (132) on the two sides of the chain sheet (13) on the axial end faces of the chain sheet (13) are overlapped, the connecting hole (133) is positioned on the contact bosses (132), and the height of the gear tooth (22) of the driving sprocket (20) is greater than the minimum distance from the edge of the contact boss (132) to the edge of the chain sheet; when the conveying chain (10) is meshed with the driving chain wheel (20), the gear teeth (22) of the driving chain wheel (20) are contacted with the contact lug bosses (132); the contact boss (132) is in an oblong shape, the two connecting holes (133) are coaxial with the two axes of the contact boss (132), the end face of the contact boss (132) is provided with a yielding groove (134), the yielding groove (134) is arranged between the two connecting holes (133), the two connecting holes (133) are symmetrical about the center line of the yielding groove (134) in the length direction, the cross section of the yielding groove (134) is arc-shaped, and the wear-resistant non-metal material is plastic, nylon or tetrafluoroethylene.

6. The chain transmission device for a pipe chain conveyor according to claim 1, wherein: the wheel body of the driven sprocket further comprises a second support plate (32), the second support plate (32) is coaxial with the outer wheel ring (31) and is fixedly connected with the inner circumferential surface of the outer wheel ring (31), and the geometric center of the second support plate (32) is overlapped with the geometric center of the outer wheel ring (31); the center of the second support plate (32) is provided with a shaft hole (38) coaxial with the outer wheel ring (31); a cylindrical shaft platform (37) coaxial with the outer wheel ring (31) is fixedly arranged on the second support plate (32), the shaft hole (38) is formed in the shaft platform (37), and the chain sheet groove and the chain are in static fit movable connection; the chain sheet (13) is made of food grade nylon.

7. The utility model provides a pipe chain conveyor, includes conveyer pipe (40), chain drive and the drive arrangement who drives chain drive motion, and chain drive's conveying chain passes in conveyer pipe (40), has seted up feed inlet and discharge gate on the conveyer pipe, its characterized in that: the chain transmission device as claimed in any one of claims 1 to 6, wherein the chain plates of the chain transmission device have a diameter adapted to the inner diameter of the conveying pipe, and the chain moves in the conveying pipe under the driving of the driving chain transmission device, and the center lines of the chain plates and the center line of the conveying pipe are arranged in the same line or in the same direction.

8. The pipe chain conveyor of claim 7, wherein: the driven sprocket according to claim 6, wherein a sprocket box is provided at the driven sprocket, the sprocket box (50) comprises a wheel body accommodating part (51) and a sprocket body accommodating part (52), the wheel body accommodating part (51) has a flat cylindrical inner cavity, the driven sprocket is rotatably provided in the inner cavity of the wheel body accommodating part through a shaft hole thereof, the driven sprocket (30) is coaxial with the inner cavity of the wheel body accommodating part (51), the sprocket body accommodating part (52) at least comprises a circular arc-shaped bent pipe section (57) which is arranged along the outer circumference of the wheel body accommodating part (51) and is coaxial with the wheel body accommodating part and intersects with and communicates with the wheel body accommodating part, a channel is formed between the groove wall of the chain sheet groove (33) of the driven sprocket (30) and the inner wall of the circular arc-shaped bent pipe section of the sprocket body accommodating part (30), the diameter of the cross section of the channel is matched with the tubular diameter of the sheet body (131), and two ends of the circular arc-shaped bent pipe section are respectively tangentially connected with the conveying pipes at the corresponding ends, the conveying chain enters the chain body accommodating part from the upper section of conveying pipe and then enters the next section of conveying pipe to complete reversing; straight pipe-shaped connecting parts (53) extending along the tangential direction of the wheel body accommodating part (51) are arranged at two ends of the chain body accommodating part (52), and are butted with the conveying pipe (40) through the connecting parts (53).

9. The pipe chain conveyor of claim 8, wherein: axial end faces on two sides of an outer wheel ring (31) of the driven sprocket are respectively provided with a discharge chute (34), and the discharge chutes (34) penetrate through the inner and outer circumferential walls of the outer wheel ring (31) and are communicated with the chain sheet grooves (33); each axial end face of the outer wheel ring (31) is provided with at least two discharge chutes (34), the discharge chutes (34) positioned on the same axial end face are uniformly distributed on the circumference by taking the shaft hole (38) as the center, the axial end face of the support plate II (32) is fixedly provided with guide edges (35) with the same number as the discharge chutes (34), the guide edges (35) correspond to the discharge chutes (34) one by one, the guide edges (35) are arc-shaped, the end faces of the guide edges (35) far away from the support plate II (32) are flush with the axial end face of the outer wheel ring (31), one end of each guide edge (35) is tangent to the outer circumferential face of the shaft platform (37), the other end of each guide edge is fixedly connected with the outer wheel ring (31) and is positioned close to the corresponding discharge chute (34), the discharge chute (34) is positioned on the side where the arc-shaped bulge of the corresponding guide edge (35), each guide edge (35) positioned on the same side of the support plate II (32) is centrally symmetrical with respect to the shaft hole (38), and a weight removing hole (36) is formed in the second support plate (32), any two adjacent guide edges (35) positioned on the same side of the second support plate (32) are provided with one weight removing hole (36), each weight removing hole (36) is a rounded triangle, and three sides of each triangle are arc-shaped and are parallel to the edges of the adjacent outer wheel rings (31) or the guide edges (35) respectively.

10. The pipe chain conveyor of claim 7, wherein: still include the dust proof box drive sprocket (20) rotate to set up in dust proof box (70), and drive arrangement sets up still including blanking box (60) in dust proof box (70), and blanking box (60) set up the top at feed inlet (41) of conveyer pipe (40), the bottom of blanking box (60) is provided with ejection of compact mouth (61), ejection of compact mouth (61) with feed inlet (41) are sealed to be communicated.