WO2022236949A1 - 一种螺旋塔输送机 - Google Patents

一种螺旋塔输送机 Download PDF

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Publication number
WO2022236949A1
WO2022236949A1 PCT/CN2021/104023 CN2021104023W WO2022236949A1 WO 2022236949 A1 WO2022236949 A1 WO 2022236949A1 CN 2021104023 W CN2021104023 W CN 2021104023W WO 2022236949 A1 WO2022236949 A1 WO 2022236949A1
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WO
WIPO (PCT)
Prior art keywords
chain
arc
net
drum
spiral
Prior art date
Application number
PCT/CN2021/104023
Other languages
English (en)
French (fr)
Inventor
吴宝东
Original Assignee
扬州市伟东传送设备有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 扬州市伟东传送设备有限公司 filed Critical 扬州市伟东传送设备有限公司
Priority to US18/023,727 priority Critical patent/US20240034566A1/en
Publication of WO2022236949A1 publication Critical patent/WO2022236949A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
    • B65G21/16—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors for conveyors having endless load-carriers movable in curved paths
    • B65G21/18—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors for conveyors having endless load-carriers movable in curved paths in three-dimensionally curved paths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/02—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration for conveying in a circular arc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B35/00—Supplying, feeding, arranging or orientating articles to be packaged
    • B65B35/30—Arranging and feeding articles in groups
    • B65B35/46—Arranging and feeding articles in groups by rotary conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B35/00—Supplying, feeding, arranging or orientating articles to be packaged
    • B65B35/30—Arranging and feeding articles in groups
    • B65B35/44—Arranging and feeding articles in groups by endless belts or chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30—Belts or like endless load-carriers
    • B65G15/54—Endless load-carriers made of interwoven ropes or wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
    • B65G2207/24—Helical or spiral conveying path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
    • B65G2207/44—Spiral conveyor tracks

Definitions

  • the invention relates to a conveyor, in particular to a spiral tower conveyor, which belongs to the technical field of conveying equipment.
  • the baked food production line needs to use high temperature to bake the food.
  • the high temperature food taken out of the oven cannot be packaged immediately, and needs to be cooled and transported for a long time.
  • the food is completely cooled before being packaged.
  • the spiral tower conveyor provides a long conveying distance in the case of a small footprint, so that a longer cooling time can be obtained, so it has been widely used in the food baking industry.
  • the existing spiral tower conveyor has the following deficiencies: 1.
  • the inner side of the network chain needs to be close to each other to adapt to the change of the outer circumference.
  • the meshing of the transition section is not smooth, or when the inner side of the network chain has not adapted to the change of the outer perimeter, the drive head engages with the drive pole in advance, so that the inner side of the network chain is limited by the reverse limit of the drive rod, and the straight line travels to the inner side of the turning transition section.
  • the traction is limited, and the continuous unadapted accumulation on the inner side of the net chain will make the length of the outer side of the net chain less than the theoretical circumference to a certain extent, making the outer side of the net chain tight.
  • the existing spiral tower conveyor needs to rely on complex auxiliary structures to achieve the meshing of the drive head inside the network chain and the drive pole, and it is necessary for the network chain to travel along the tower body at a sufficient angle and height. Successfully complete the engagement of the drive head with the drive pole.
  • the rotation of the drum is usually achieved by the main drive sprocket driving the drum sprocket through the chain. Since the transmission ratio between the main drive sprocket and the drum sprocket is relatively large, the transmitted load is also relatively large. The main drive chain Tooth jumping is easy to occur between the wheel and the chain, which affects the stability of the equipment.
  • the object of the present invention is to overcome the problems existing in the prior art and provide a spiral tower conveyor with a small footprint, smooth operation and turning of the network chain, and can keep moving forward steadily in a relaxed state.
  • a spiral tower conveyor of the present invention includes a rotating drum, and the mesh chain is spirally wound around the outer periphery of the rotating drum and rotates synchronously with the rotating drum.
  • the inner sides are respectively provided with drive heads protruding towards the direction of the cylinder, the inner edge of the drive heads is in a convex arc shape, and the double or one side of the drive head is provided with arc grooves that match the drive poles.
  • the driving vertical rods are evenly distributed on the outer circumference of the drum and meshed with the driving heads of each layer; the bottoms of the mesh chains of each layer are respectively supported on the spiral ring rails, and the spiral ring rails of each layer are respectively fixed on the radial support rods Above, the outer ends of the radial support rods are respectively fixed on the uprights, and the uprights are evenly distributed around the axis of the drum.
  • the net chain enters the circular arc spiral section from the straight line running section through the turning transition section, the chain pins of the straight line running section are parallel to each other, and the chain pins of the circular arc spiral section are distributed in a fan shape;
  • the outside of the net chain forces the loose inside of the net chain to adjust its position so that the inside adapts to the perimeter of the outside before the drive head on the inside of the net chain engages with the corresponding drive pole.
  • an arc-shaped limiting plate is provided below the turning transition section, and the net chain turns and advances along the limiting arc of the arc-shaped limiting plate; the radius of the limiting arc is equal to or smaller than the limiting arc.
  • the distance between the end of the arc head and the axis of the drum, the axis of the limit arc deviates from the axis of the drum so that the distance between the end of the limit arc and the axis of the drum is smaller than the distance between the end of the limit arc and the axis of the drum .
  • each chain link of the net chain is respectively provided with downwardly extending limiting projections, and each limiting projection slides against the outer arc surface of the arc-shaped limiting plate.
  • each link of the net chain is respectively provided with pin hole one and pin hole two through the width direction of the net chain, and the cross-section of pin hole one and pin hole two is along the forward direction of the net chain.
  • the front side wall of pin hole 1 of several chain teeth on the outside of the network chain is inclined forward along the same slope, and the rear side wall of pin hole 2 of several chain teeth on the outside of the network chain is backward along another slope tilt.
  • each chain link of the net chain is respectively provided with a downwardly extending limiting protrusion
  • the bottom of the outer arc surface of the arc-shaped limiting plate is provided with an outwardly extending limiting flash.
  • a plurality of limit rollers or limit balls are fixed on the limit flash, and each limit protrusion slides against the limit rollers or limit balls respectively.
  • each chain link of the network chain is respectively provided with a downwardly extending limit shaft, and each limit shaft is respectively equipped with a limit bearing, and each limit bearing is respectively against the arc limit. Slide on the outer arc surface of the board.
  • each chain link of the net chain are respectively provided with downwardly extending net chain lugs, and the free ends of each net chain lug are respectively equipped with limit rollers or limit balls, and each limit roller or limit The bit balls respectively slide against the outer arc surface of the arc-shaped limiting plate.
  • a plurality of drum vertical rods are uniformly arranged along the circumference of the drum, and each driving vertical rod is respectively fixed on the outer surface of the corresponding drum vertical rod.
  • each drum vertical rod is fixed with a guide block
  • the guide block is located at the bottom of the drum of the ascending spiral or at the top of the drum of the descending spiral
  • each guide block is respectively provided with a guide arc surface with a smooth transition and the guide arc surface
  • the guide arc surface is coaxial with the rotating cylinder and the radius is equal to or smaller than the radius of the rotating cylinder
  • the guiding arc surface of the ascending spiral faces downward
  • the guiding arc surface of the descending spiral faces upward
  • the driving arc surfaces of the ascending spiral The rod is inserted from the middle of the guide inclined arc surface in the width direction and extends to the bottom of the guide arc surface.
  • the outer edge of the guide block is tangent to the guide arc surface; the outer side of the network chain in the turning transition section forces the loose inner side of the network chain to adjust its position, and the inner side of the network chain slides along the guide arc surface of the guide block until the inner side of the network chain adapts to the perimeter of the outer side of the network chain. , the drive head on the inner side of the net chain is engaged with the corresponding drive pole.
  • a floating block is fixed at one end of each drum vertical bar, and the floating block is located at the bottom of the rotating drum of the ascending spiral or at the top of the rotating drum of the descending spiral, and the floating block is provided with an arc-shaped ridge.
  • the arc-shaped convex ridges are inclined to the forward direction of the network chain, the lower ends of the driving vertical rods of the ascending spiral are spliced with the arc-shaped convex ridges, and the upper ends of the driving vertical rods of the descending spiral are spliced with the described arc-shaped convex ridges;
  • the outer edge of the curved ridge is flush with the outer edge of the drive pole, or the outer edge of each arc-shaped ridge is higher than the outer edge of the drive pole; the outside of the net chain in the turning transition section is forced to adjust the position inside the loose net chain,
  • the inner side of the network chain slides along the arc-shaped ridge of the floating block until the inner side of the network chain adapts to the circumference of the outer side of the network chain, and then the driving head on the inner side of the network chain is engaged with the corresponding driving vertical rod.
  • the back of the floating block is embedded in the vertical slot of the corresponding drum vertical rod, and the middle part of the vertical slot in the width direction is provided with a vertical tenon, and the vertical tenon It is embedded in the slot of the floating block on the back of the floating block; a floating spring is embedded in the vertical tenon, and the other end of the floating spring is embedded in the counterbore of the floating block.
  • the entrance of the turning transition section is equipped with an inner sprocket and an outer sprocket, the inner sprocket meshes with the inner chain link of the mesh chain, and the outer sprocket meshes with the outer chain of the mesh chain
  • the rotation speed and the number of teeth of the inner sprocket and the outer sprocket are the same, and the pitch circle diameter of the outer sprocket is larger than the pitch circle diameter of the inner sprocket.
  • two rotating cylinders are arranged side by side.
  • the network chain input section of the net chain enters the ascending spiral of the left rotating cylinder after turning to the right through the turning transition section. Enter the network chain transition section to the right, and the network chain transition section enters the descending spiral of the right drum after the turning transition section to the right, and enters the network chain output section from the bottom of the right drum along the tangential direction to the right.
  • the output section of the network chain enters the return section of the network chain to the left after passing the right steering wheel, and the left end of the return section of the network chain bypasses the left steering wheel and is connected with the input section of the network chain.
  • the centers of the two drums are respectively supported on the frame by the central shafts of the drums, the bottoms of the two drums are respectively fixed with drum sprockets, and the main drive sprockets are arranged between the two drum sprockets and a tensioning sprocket, the transmission chain bypasses the main driving sprocket and the tensioning sprocket and is connected to the two drum sprockets; each chain link of the transmission chain includes a pair of outer chain plates parallel to each other, The ends of two adjacent outer chain plates are hinged to each other through an inner joint.
  • the left end of the inner joint is a pair of inner chain plates parallel to each other, and the inner chain plates are attached to the inside of the right end of the previous pair of outer chain plates. and connected to each other; the right end of the inner joint is the engaging end, and the engaging end is located between the left ends of the rear pair of outer chain plates and is hinged with each other through chain pins.
  • the engaging end is provided with an oblique engaging surface; the main The chain teeth of the driving sprocket are trapezoidal teeth, and the slopes of the trapezoidal teeth mesh with the oblique meshing surfaces at the lower part of the meshing end.
  • a roller is provided between the two inner chain plates, and the roller is installed in the middle of the second chain pin, and the two ends of the second chain pin are respectively passed through the pin holes of the inner chain plate and riveted to the front
  • At least one plate chain is provided below the network chain transition section, and the plate chain is wrapped around the plate chain driving wheel and the plate chain driven wheel.
  • the output shaft of the chain drive motor is driven by a one-way bearing; the tight edge of the plate chain is attached to the bottom of the transition section of the mesh chain and travels in the same direction, and the middle of each link of the plate chain is respectively provided with an upward vertical plate chain Convex teeth, the protruding teeth of the plate chain on the tight side are correspondingly embedded in the tooth grooves of the corresponding chain links of the transition section of the mesh chain.
  • a swinging car guide rail is provided under the transition section of the network chain, the top surface of the swinging car guide rail is horizontal and supported on the bottom of the network chain, and the middle part of the top surface of the swinging car guide rail is provided with a
  • the sinking groove of the swinging car guide rail extending in the forward direction of the net chain, the tight side of the plate chain is embedded in the sinking groove of the swinging car guide rail;
  • the sinking groove of the swinging car guide rail includes a smooth transition of the horizontal section of the sinking groove and the inclined section of the sinking groove , and the inclined section of the sinker slopes downward along the advancing direction of the tight edge of the plate chain, the tight edge of the plate chain leans against the bottom of the sinker groove of the swing car guide rail and advances inclined downward, and the driving wheel of the plate chain is located in the inclined sinker groove
  • the outlet of the section, and the pitch circle of the plate chain driving wheel is tangent to the bottom wall of the inclined section of the sinker.
  • the front and rear sides of the bottom of the swing car guide rail sink groove are symmetrically provided with limiting grooves so that the cross section of the swing car guide rail sink groove is in an inverted T shape, and the bottom of each chain link of the plate chain
  • the front and rear sides are symmetrically provided with plate chain limit flashes extending outward, and the plate chain limit flashes on the front and rear sides of the plate chain tight edge are symmetrically embedded in the limit grooves at the bottom of the sinking groove of the swing car guide rail;
  • the return section of the net chain is provided with a net chain tensioning device located between the two drums, and the net chain tensioning device includes two fixed-axis tensioning wheels, two fixed-axis tensioning wheels There is a floating tensioning wheel between them, and the tensioning section of the net chain bypasses the fixed-axis tensioning wheel on the right, the floating tensioning wheel and the fixed-axis tensioning wheel on the left in turn, and the moving shaft of the floating tensioning wheel is A counterweight is suspended; the left and right sides of the counterweight are symmetrically provided with mutually parallel uprighting guide rails, and the two uprighting guide rails are provided with uprighting guide grooves that extend vertically and have opposite openings; the left and right sides of the counterweight The ends are respectively provided with counterweight centralizing rods extending outward, and the outer ends of the two counterweight centralizing rods are respectively equipped with counterweight centralizing wheels, and the two counterweight centralizing wheels are respectively located in the centralizing guide grooves of the centralizing guide rails
  • the driving vertical rods on the outer circumference of the drum are embedded in the arc grooves of the driving head, which not only plays the role of meshing transmission, but also prevents the driving head from slipping outwards .
  • each driving vertical rod drives the mesh chain to rotate synchronously, and pads can be embedded on the spiral ring rail to reduce the sliding resistance of each layer of mesh chain when rotating.
  • An implementation of the network chain from the straight-line travel section to the turning transition section is that the limit protrusions of each chain link slide against the outer arc surface of the arc limit plate, forcing the network chain to move along the arc limit.
  • the position plate limit arc turns and moves forward.
  • the outside of the net chain of the turning transition section forces the loose net chain inside to adjust its position so that the inside adapts to the perimeter of the outside.
  • the drive head on the inner side of the net chain is directly engaged with the corresponding drive pole, and the drive pole can extend along the full height direction of the drum, and there is no need to set a guide block at the entrance of the drive pole.
  • the entrance end of the limit arc deviates to the outside of the drum, so that the drive head at the entrance end and the drive pole are separated by a certain distance, so as to avoid the advance contact or engagement between the drive head inside the network chain and the drive pole, and avoid the process of adjusting the position inside the network chain restricted in.
  • the outlet end of the limit arc intersects with the circumference of the drive pole, so that after the position of the inner side of the net chain is adjusted in place, the drive head is smoothly engaged with the drive pole.
  • the front inclined surface forms an angle ⁇ with the front side wall of the straight hole, so that the outer end of the chain pin one cannot touch the front inclined surface, and the chain pin one
  • the point of effort with pin hole one when turning is the intersection point of the front inclined surface and the front side wall of the straight hole, that is, the point of effort of chain pin one and pin hole one has moved a section of distance inwardly from the chain teeth on the outermost side.
  • the angle ⁇ is formed between the rear inclined surface and the rear side wall of the straight hole, so that the outer end of the chain pin 2 cannot touch the rear inclined surface, and the chain pin 2
  • the point of effort with pin hole two when turning is the intersection point of the rear inclined surface and the rear side wall of the straight hole, that is, the point of effort of chain pin two and pin hole two has moved a certain distance inward from the chain teeth on the outermost side.
  • the limit protrusion on the outside of the network chain is against the outer arc surface of the arc-shaped limit plate, it is located at a distance outside the intersection of the front inclined surface and the front side wall of the straight hole, and the force point of the network chain is located at the limit protrusion.
  • the frictional resistance from the limit protrusion and the traction force from the force point make the inside of the chain move further forward, and there are more driving heads entering the turning transition section, which is convenient to adapt to the driving head after the outer perimeter It is smoothly engaged with the corresponding driving pole, and the mesh chain after meshing will not generate a tension greater than that of the front section, which better realizes slack conveying.
  • Another way for the network chain to enter the turning transition section is to set a guide block at the entrance end of the vertical rod of the drum.
  • the driving vertical rod extends to the bottom of the guide arc surface and the outer edge is in line with the guide circle.
  • the arc surface is tangent, and the driving pole is hidden in the guiding arc surface, so that the driving head can slide freely along the guiding arc surface, so that the outside of the net chain is forced to adjust the position inside the loose net chain without interference from the driving pole.
  • the drive head rises with the network chain to the position of the guide inclined arc surface, and engages with the driving pole plugged on the guide inclined arc surface. Mesh space.
  • Another implementation mode for the net chain to enter the turning transition section is to set a floating block at the entrance end of the vertical rod of the drum. Taking the descending spiral as an example, the upper end of each driving vertical rod is spliced with the arc-shaped ridge of the floating block. ; Make the drive head slide freely along the arc-shaped ridge, so that the outside of the network chain is forced to adjust the position of the inside of the loose network chain without interference from the drive pole. After the inside of the network chain completely adapts to the perimeter of the outside, the drive head follows the network chain Descend to the upper end of the drive upright and into engagement.
  • the cooperation between the two sides of the floating block and the vertical slot of the vertical bar of the drum, and the cooperation between the vertical tenon and the slot of the floating block enable the floating block to float in the diameter direction of the drum, and the floating spring provides the floating block with outward force.
  • the elastic force can compensate the error of the radius of gyration of the net chain, so that the transition section of the net chain can maintain a certain tension, especially for the double-tower structure, the net chain at the exit of the left drum can be rotated out normally, without stopping phenomenon, and the elasticity of the floating block can make up for the double tower structure.
  • the inclined meshing surface at the lower part of the meshing end meshes with the trapezoidal teeth of the main drive sprocket, which can carry a relatively large load, reliable transmission, and is not prone to tooth skipping. It can also be used on heavy-duty traction conveyors in other scenarios.
  • Each chain link of the transmission chain can also be provided with two chain pins and two meshing surfaces.
  • the sprockets of the drum sprocket can mesh with the rollers on the second chain pin.
  • the trapezoidal teeth of the main drive sprocket and the The oblique meshing surface at the lower part of the meshing end engages, which not only improves the bearing capacity, but also prolongs the service life of the transmission chain.
  • the outer chain plate and the inner chain plate can be manufactured separately or connected as a whole.
  • the net chain tensioning device can make the net chain properly tensioned to obtain pre-tensioning force, reduce the drape of the net chain, and on the other hand, it can compensate the net chain due to tension or The change in length caused by thermal expansion and contraction.
  • the left and right ends of the counterweight are raised and lowered through the counterweight centralizing wheel embedded in the centralizing guide groove of the centralizing guide rail, which can avoid the back and forth shaking of the counterweight during the lifting process and reduce the resistance when the counterweight is lifted; when the return section of the network chain When the tension is small, the counterweight goes down, and more net chains are stored at the same time; otherwise, the counterweight goes up.
  • the floating tensioning wheel shaft realizes flexible connection with the counterweight centralizing rod through the traction spring, which can reduce the impact load when tensioning and floating, and avoid excessive fluctuation of the network chain.
  • the output end of the tensioning device motor drives the driving shaft of the tensioning wheel through a one-way bearing.
  • the speed of the network chain is greater than the speed of the active tensioning wheel, the one-way bearing slips to avoid interference; the speed of the tensioning device motor depends on the network.
  • the drape of the chain depends on the weight of the counterweight. The ideal state is to balance 90%-100% of the weight of the counterweight to avoid the weight of the counterweight from bringing additional load to the network chain and affecting the relaxation of the network chain. Conveying, control the drape of the net chain within the set range.
  • the transition section of the net chain between the two spiral towers is provided with a plate chain.
  • one plate chain can be installed, or two can be arranged symmetrically.
  • the plate chain drive motor drives the drive wheel of the plate chain to rotate through the one-way bearing.
  • the plate chain drive motor can use torque to control the motor, and the one-way bearing can be driven to rotate, so that the plate chain can only compensate the driving force of the transition section of the network chain and will not form Interference; the drive wheel of the plate chain drives the plate chain and the transition section of the network chain to move forward in the same direction, and the protruding teeth of the plate chain on the plate chain mesh with the corresponding links of the chain transition section, which can apply auxiliary driving force to the network chain transition section to make up for the double Synchronization error between towers.
  • the swinging car guide rail can support the weight of the transition section of the network chain to avoid its sagging, and the sinking groove of the swinging car guide rail provides accommodation space for the plate chain.
  • the protruding teeth of the plate chain mesh with the net chain at the horizontal section of the sinking groove to generate driving force.
  • the protruding teeth of the plate chain in front have entered the inclined section of the sinking groove, gradually sinking away from the chain groove of the network chain, and travel to the inclined section of the sinking groove
  • the protruding teeth of the plate chain at the end have completely broken away from the net chain, and then enter the arc section of the plate chain driving wheel.
  • a sinker horizontal section and a sinker inclined section are arranged in front of the driving wheel of the plate chain.
  • the change is smaller than that of the arc section, which not only ensures the meshing drive of the protruding teeth of the plate chain in the horizontal section of the sinker, but also enables the protruding teeth of the plate chain after driving to be disengaged smoothly.
  • the limit flash of the plate chain on the front and rear sides of the plate chain is embedded in the limit groove of the swing car guide rail, so that the plate chain is limited to the bottom of the sinking groove of the swing car guide rail to avoid jumping; at the same time, the plate chain is along the inclined section of the sinking groove When the bottom of the chain moves forward, the protruding teeth of the plate chain are forced to disengage from the tooth grooves of the transition section of the mesh chain to avoid the formation of stuck teeth.
  • the protruding teeth of the plate chain are higher than the chain pins of the net chain, and the meshing faces are convex in the forward direction, which is conducive to applying a force component directed to the top surface of the swing car guide rail while applying forward power to the net chain, so that the net chain can be stably supported On the swing rail, avoid its jumping.
  • the pitch of the plate chain is slightly smaller than the pitch of the net chain.
  • the pitch of the plate chain is 1mm smaller than the pitch of the net chain.
  • the protruding teeth of the plate chain in the horizontal section of the sinking groove When the protruding teeth of the plate chain in the horizontal section of the sinking groove are in the meshing driving state, the protruding teeth of the plate chain entering the inclined section of the sinking groove can be more smoothly out of the chain groove of the network chain. Further reduce the possibility of interference.
  • Fig. 1 is the perspective view of spiral tower conveyor of the present invention
  • Fig. 2 is the three-dimensional sectional view of spiral tower conveyer of the present invention
  • Fig. 3 is the front view of spiral tower conveyor of the present invention.
  • Fig. 4 is the top view of Fig. 3;
  • Fig. 5 is the back view of Fig. 3;
  • Fig. 6 is a sectional view along A-A in Fig. 4;
  • Fig. 7 is a sectional view along B-B among Fig. 4;
  • Fig. 8 is the bottom view when the net chain is directly engaged with the drive pole after the turning transition section;
  • Fig. 9 is a bottom perspective view of a turning transition section with an arc-shaped limiting plate
  • Fig. 10 is a schematic diagram of the self-contained limit ball of the arc limit plate
  • Figure 11 is a schematic diagram of the mesh chain with its own limit bearing
  • Fig. 12 is the schematic diagram of the self-limiting ball of the net chain
  • Fig. 13 is the cross-sectional view of a certain chain link of net chain
  • Fig. 14 is the state diagram when the net chain is meshed with the drive pole through the turning transition section when the belt guide block is used;
  • Figure 15 is a perspective view of the lower end of the driving vertical rod inserted from the guide inclined arc surface and extending to the bottom of the guide arc surface;
  • Fig. 16 is a perspective view when a floating block is set at the lower end of the drive pole
  • Fig. 17 is an exploded view of the matching part of the floating block and the drum vertical bar;
  • Fig. 18 is the embodiment one of transmission chain among the present invention.
  • Figure 19 is a top view of a chain link in Figure 18;
  • Figure 20 is a sectional view along C-C in Figure 19;
  • Fig. 21 is the second embodiment of the transmission chain in the present invention.
  • Fig. 22 is the front view of the plate chain auxiliary drive network chain transition section
  • Figure 23 is a perspective view of Figure 22;
  • Fig. 24 is the front view of the stretching section of the tensioning device motor driven mesh chain
  • Fig. 25 is a state diagram of the floating tension wheel suspending the counterweight through the traction spring.
  • drum; 1a center axis of drum; 1b. vertical bar of drum; 1b1. vertical slot; 1b2. vertical tenon; 1c. drum sprocket; .Left tube guide block; 1f. Right tube guide block; 1f1. Guide arc surface; 1f2. Guide oblique arc surface; 1g. Floating block; 1g1. Arc-shaped ridge; ;
  • Net chain 2a. Net chain input section; 2b. Net chain transition section; 2c. Net chain output section; 2d. Net chain return section; 2e. Net chain tension section; 2f. Drive head; 2g. Limit Protrusion; 2h. Pin hole one; 2j. Pin hole two; 2k. Mesh chain lug; 2m. Limit ball; 2n. Limit bearing;
  • orientations or positional relationships indicated by the terms “front”, “rear”, “left”, “right”, “inner”, “outer”, etc. are based on the orientations or positional relationships shown in the drawings , is only for the convenience of describing the present invention and simplifying the description, and does not mean that the device must have a specific orientation, and the conveyor can be arranged in a mirror image of the direction shown in the figure.
  • the spiral tower conveyor of the present invention includes a drum 1, and the mesh chain 2 is helically wound around the periphery of the drum 1 and rotates synchronously with the drum 1, and each chain link of the mesh chain 2 is close to
  • the inner side of the drum 1 is respectively provided with a drive head 2f protruding towards the direction of the cylinder, the inner edge of the drive head 2f is in a convex arc shape, and the double or one side of the drive head 2f is provided with a circle that coincides with the drive vertical rod 1d.
  • the arc groove, the driving vertical rod 1d is evenly distributed on the outer periphery of the drum 1 and meshed with the driving head 2f of each layer; each driving vertical rod 1d is embedded in the arc groove of the driving head 2f, which not only plays the role of meshing transmission, It can also prevent the drive head 2f from slipping outwards.
  • each layer of net chain 2 is supported on the spiral ring rail 21c to slide respectively, and pad strip 21d can be embedded on the spiral ring rail 21c, to reduce the sliding resistance when each layer of mesh chain 2 rotates, each layer of spiral ring rail 21c respectively It is fixed on the radial support rod 21b, and the outer end of each radial support rod 21b is respectively fixed on the column 21a, and each column 21a is evenly distributed around the axis of the drum.
  • each drive vertical rod 1d drives the net chain 2 to rotate synchronously.
  • the net chain 2 enters the arc spiral section from the straight line running section through the turning transition section.
  • the chain pins in the straight line section are parallel to each other, and the chain pins in the arc spiral section are distributed in a fan shape; the net chain outside the turning transition section is forced to loosen.
  • the inside of the chain adjusts the position so that after the inside adapts to the circumference of the outside, the drive head 2f on the inside of the net chain meshes with the corresponding drive vertical rod 1d.
  • a plurality of drum vertical rods 1b are evenly arranged along the circumferential direction of the drum 1, and each driving vertical rod 1d is respectively fixed on the outer surface of the corresponding drum vertical rod 1b.
  • Fig. 8 and Fig. 9 show an embodiment in which the net chain 2 enters the turning transition section from the straight-line traveling section, and an arc-shaped limiting plate 22 is arranged under the turning transition section, and the net chain 2 follows the arc-shaped limiting plate 22.
  • the limiting arc turns and moves forward, and the surface of the limiting arc can be hardened.
  • Each chain link of the net chain 2 is respectively provided with a downwardly extending limiting protrusion 2g, and each limiting protrusion 2g slides against the outer arc surface of the arc-shaped limiting plate 22 respectively.
  • the limit protrusion 2g of each chain link slides against the outer arc surface of the arc limit plate 22, forcing the net chain 2 to turn and advance along the limit arc of the arc limit plate 22, passing through the arc limit plate 22
  • the outer side of the net chain of the turning transition section is forced to adjust the position of the loose inner side of the net chain so that the inner side adapts to the circumference of the outer side. 1d is engaged, the driving vertical rod 1d can extend along the full height direction of the drum 1, and there is no need to set a guide block at the inlet end of the driving vertical rod 1d.
  • the radius of the limit arc is equal to or less than the distance between the end of the limit arc and the axis of the drum, and the axis of the limit arc deviates from the axis of the drum to make the distance between the end of the limit arc and the axis of the drum Less than the distance between the end of the limit arc and the axis of the drum.
  • the entrance end of the limit arc deviates to the outside of the drum, so that the driving head 2f at the entrance end is separated from the driving vertical rod 1d by a certain distance, so as to avoid the early contact or engagement between the driving head 2f inside the mesh chain and the driving vertical rod 1d, and avoid adjustment inside the mesh chain
  • the location process is limited.
  • the outlet end of the limit arc intersects with the circumference of the driving vertical rod 1d, so that after the position of the inner side of the net chain is adjusted in place, the driving head 2f meshes smoothly with the driving vertical rod 1d.
  • each link of the net chain 2 are respectively provided with a downwardly extending position-limiting projection 2g
  • the bottom of the outer arc surface of the shape limit plate 22 is provided with a limit flash extending outwards, and a plurality of limit rollers or limit balls 2m are fixed on the limit flash, and each limit protrusion 2g is respectively against the limit Sliding on the 2m of the position roller or the limit ball.
  • each chain link of the network chain 2 are respectively provided with downwardly extending limit shafts, and each limit shaft is respectively equipped with a limit bearing 2n, and each limit bearing 2n is respectively against the arc limit The outer arc surface of the plate 22 slides.
  • each chain link of the net chain 2 are respectively provided with downwardly extending net chain lugs 2k, and the free ends of each net chain lugs 2k are respectively equipped with limit rollers or limit balls 2m, each limit The rollers or limit balls slide against the outer arc surface of the arc limit plate 22 respectively.
  • each link of the net chain 2 is provided with a pin hole 1 2h and a pin hole 2j through the width direction of the net chain respectively, and the cross-section of the pin hole 1 2h and the pin hole 2 2j is along the net chain.
  • the oval extending in the forward direction, the front side walls of the pin holes 2h of several chain teeth outside the net chain are inclined forward along the same slope, and the rear side walls of the pin holes 2 2j of several chain teeth outside the net chain are along the other side.
  • One ramp slopes backwards.
  • the front inclined surface After setting the front inclined surface in the pin hole one of several chain teeth on the outer side of the net chain, the front inclined surface forms an angle ⁇ with the front side wall of the straight hole, so that the outer end of the chain pin one cannot touch the front inclined surface, and the chain pin
  • the force point of chain pin 1 and pin hole 1 2h when turning is the intersection point of the front inclined surface and the front side wall of the straight hole, that is, the force point of chain pin 1 and pin hole 1 2h moves inward for a certain distance from the outermost sprocket .
  • the rear inclined surface forms an angle ⁇ with the rear side wall of the straight hole, so that the outer end of the chain pin 2 cannot touch the rear inclined surface, and the chain pin
  • the force point of pin 2 and pin hole 2 2j when turning is the intersection point of the rear inclined surface and the rear side wall of the straight hole, that is, the force point of chain pin 2 and pin hole 2 2j moves inward for a certain distance from the outermost sprocket .
  • the limit protrusion 2g on the outside of the net chain is against the outer arc surface of the arc limit plate 22, it is located at a distance outside the intersection of the front inclined surface and the front side wall of the straight hole, and the force point of the net chain is located at the limit protrusion.
  • another embodiment of the network chain entering the turning transition section is that one end of the vertical bar 1b of each drum is fixed with a guide block, and the guide block is located at the bottom of the drum of the ascending spiral or at the bottom of the descending spiral.
  • each guide block is respectively provided with a smooth transition guide arc surface and a guide inclined arc surface, the guide arc surface is coaxial with the drum and the radius is equal to or smaller than the radius of the drum, and the guide arc surface of the ascending spiral is facing downward , the guiding arc surface of the descending spiral faces upward, each driving vertical rod 1d of the ascending spiral is inserted from the middle of the guiding inclined arc surface in the width direction and extends to the bottom of the guiding arc surface, and each driving vertical rod 1d of the descending spiral is inserted from the guiding inclined arc
  • the middle part of the surface width direction is inserted and extended to the top of the guide arc surface, and the outer edge of each driving vertical rod 1d is tangent to the guide arc surface;
  • the guide arc surface of the guide block slides until the inside of the network chain adapts to the circumference of the outside of the network chain, and the drive head 2f on the inside of the network chain meshes with the corresponding drive vertical rod 1d.
  • a guide block is set at the entrance of the drum vertical rod 1b.
  • the driving vertical rod 1d extends to the bottom of the guiding arc surface and its outer edge is tangent to the guiding arc surface, and the driving vertical rod is hidden in the guiding arc surface. , so that the drive head 2f can slide freely along the guide arc surface, so that the outside of the net chain is forced to adjust the position of the inside of the loose net chain without interference from the driving pole.
  • the drive head 2f follows The net chain rises to the position of the guide inclined arc surface, and engages with the drive vertical rod 1d inserted on the guide inclined arc surface, and the guide inclined arc surface provides engagement space for both sides of the drive vertical rod 1d.
  • yet another embodiment in which the net chain 2 enters the turning transition section is that one end of each drum vertical bar 1b is fixed with a floating block 1g, and the floating block 1g is located at the bottom of the rotating drum of the ascending spiral or at On the top of the drum of the descending spiral, the floating block 1g is provided with an arc-shaped ridge 1g1, and the arc-shaped ridge 1g1 is inclined to the forward direction of the net chain 2, and the lower ends of the driving vertical rods 1d of the ascending spiral are spliced with the arc-shaped ridge 1g1, The upper end of each driving vertical rod 1d of the descending spiral is spliced with the arc-shaped convex ridge 1g1; the outer edge of each arc-shaped convex ridge 1g1 is flush with the outer edge of the driving vertical rod 1d, or the outer edge of each arc-shaped convex ridge 1g1 is higher than Drive the outer edge of the vertical pole 1d;
  • each driving vertical rod 1d is spliced with the arc-shaped ridge 1g1 of the floating block 1g; the drive head 2f can slide freely along the arc-shaped ridge 1g1, so that the outside of the net chain is forced to loosen the inside of the net chain Adjust the position without interference from the drive pole, and after the inside of the net chain fully adapts to the perimeter of the outside, the drive head 2f descends to the upper end of the drive pole 1d along with the net chain 2 and enters into engagement.
  • the back of the floating block 1g is embedded in the vertical groove 1b1 of the corresponding drum vertical rod 1b, and the middle part of the vertical groove 1b1 in the width direction is provided with a vertical tenon 1b2, and the vertical tenon 1b2 is embedded in the back of the floating block 1g.
  • the floating block is embedded in the slot 1g2; the vertical tenon 1b2 is embedded with a floating spring 1g3, and the other end of the floating spring 1g3 is embedded in the counterbore of the floating block 1g.
  • the entrance of turning transition section can be equipped with inside sprocket wheel 23 and outside sprocket wheel 24, and inside sprocket wheel 23 is meshed with the inside chain link of network chain 2, and outside sprocket wheel 24 and the outside chain of network chain 2
  • the joints are meshed; the speed of the inner sprocket 23 is the same as that of the outer sprocket 24, which can be assisted by a torque motor.
  • two rotating cylinders 1 can be arranged side by side.
  • the lower ends of the driving vertical rods 1d of the left rotating cylinder are respectively provided with left cylinder guide blocks 1e, and the driving vertical rods 1d of the right rotating cylinder are arranged respectively.
  • the upper end of the upper end is respectively provided with the right cylinder guide block 1f; the network chain input section 2a of the network chain 2 extends to the right and enters the outer periphery of the left cylinder guide block 1e at the lower part of the left drum along the tangential direction, and spirals along the outer circumference of the left drum.
  • the outer circumference of the rotating cylinder is spirally wound and descends, and enters the network chain output section 2c from the bottom of the right rotating cylinder tangentially to the right, and the network chain output section 2c enters the network chain return section 2d left after passing through the right steering wheel 16.
  • the left end of the chain return section 2d walks around the left turning wheel 15 and links to each other with the network chain input section 2a.
  • the network chain input section 2a After the network chain input section 2a is derived from the left steering wheel 15, it enters the guide arc surface of the left cylinder guide block 1e along the tangential direction, and after advancing, it is wound upwards, enters the guide oblique arc surface of the left cylinder guide block 1e, and turns along the left side.
  • the driving vertical rods 1d evenly distributed on the drum circumference respectively hook the driving head 2f of the net chain 2 close to the inner side of the drum, and drive the net chain 2 to go around the rotating disc of the drum and rise to the top of the drum on the left side, and lead out along the tangential direction and enter the network chain transition.
  • Section 2b then enters the guide arc surface 1f1 of the guide block 1f of the right cylinder along the tangential direction, and after advancing, it is wound downwards and enters the guide oblique arc surface 1f2 of the guide block 1f of the right cylinder.
  • the driving vertical rod 1d respectively hooks the drive head 2f of the net chain 2 close to the inside of the drum, drives the net chain 2 to rotate around the drum and descends to the bottom of the right drum, and is exported along the tangential direction to enter the net chain output section 2c, and passes through to the right.
  • the centers of the two drums are respectively supported on the frame 21 by the drum center shaft 1a, the bottoms of the two drums are respectively fixed with drum sprockets 1c, and the main driving sprocket 18 and the tension pulley are arranged between the two drum sprockets 1c. Tighten the sprocket 19, the transmission chain 3 bypasses the main driving sprocket 18 and the tensioning sprocket 19 in an S shape and is connected to the two rotating drum sprockets 1c.
  • the main driving sprocket 18 is installed on the output of the main driving motor reducer 17 On the shaft, the main drive motor speed reducer 17 is fixed on the nearby frame 21.
  • the transmission chain 3 includes a plurality of chain links connected in sequence, and each chain link includes a pair of outer chain plates 3a parallel to each other, passing between the ends of two adjacent outer chain plates 3a.
  • the inner joints 3b are hinged to each other, the left end of the inner joint 3b is a pair of inner chain plates 3b3 parallel to each other, and the inner chain plates 3b3 are attached to the inside of the right end of the previous pair of outer chain plates and connected to each other; the right end of the inner joint 3b is the engaging end 3b1
  • the engaging end 3b1 is located between the left ends of the rear pair of outer chain plates and is hinged to each other by a chain pin 3d, and the engaging end 3b1 is provided with an oblique engaging surface 3b2.
  • the oblique meshing surface 3b2 at the lower part of the meshing end 3b1 meshes with the trapezoidal teeth of the main driving sprocket 18, which can carry a relatively large load, reliable transmission, and is not prone to tooth skipping, and can also be used on heavy-duty traction conveyors in other scenarios .
  • a roller 3c is arranged between the two inner chain plates 3b3, and the roller 3c is installed in the middle of the second chain pin 3e, and the two ends of the second chain pin 3e pass through the pin holes of the inner chain plate 3b3 respectively and are riveted to the front pair of outer chain plates.
  • Right end, outer chain plate 3a and interior chain plate 3b3 can split manufacturing, interior chain plate 3b3 and the right end of previous pair of outer chain plates are mutually hinged by chain pin two 3e.
  • Each chain link of transmission chain 3 can also be provided with two chain pins and two meshing surfaces, and the sprocket tooth of drum sprocket 1c can be meshed with the roller 3c on chain pin two 3e, and the main drive sprocket 18
  • the trapezoidal teeth mesh with the inclined meshing surface 3b2 at the bottom of the meshing end 3b1, which not only improves the load carrying capacity, but also prolongs the service life of the transmission chain 3.
  • Fig. 21 shows another embodiment of the transmission chain 3
  • the inner chain plate 3b3 can be integrated with the right ends of the previous pair of outer chain plates 3a.
  • the roller 3c is meshed with the sprocket of the drum sprocket 1c, the sprocket of the main drive sprocket 18 is a trapezoidal tooth, and the slope of the trapezoidal tooth is meshed with the oblique meshing surface 3b2 at the bottom of the meshing end.
  • Another driving method that can be used for the rotating drum is: the left rotating drum and the right rotating drum are respectively synchronously driven by two linked servo motors.
  • Another driving mode that the drum can also adopt is: the left drum and the right drum share a main drive motor reducer 17, and two main drive sprockets are installed on the output shaft of the main drive motor reducer 17. 18.
  • the two main driving sprockets 18 respectively drive the corresponding drum sprocket 1c through their respective transmission chains.
  • the net chain return section 2d is provided with a net chain tensioning device between the two drums, and the net chain tensioning device includes two fixed-axis tensioning wheels 9, A floating tensioning wheel 10 is arranged between the two fixed-axis tensioning wheels 9, and the mesh chain tensioning section 2e bypasses the fixed-axis tensioning wheel 9 on the right, the floating tensioning wheel 10 and the fixed-axis tensioning wheel on the left in turn 9.
  • a counterweight 11 is suspended on the moving shaft of the floating tensioner 10 .
  • the net chain tensioning device can make the net chain 2 properly tensioned to obtain pre-tensioning force, reduce the drape of the net chain, and on the other hand, it can compensate the net chain due to tension or tension.
  • the left and right ends of the counterweight 11 are raised and lowered by being embedded in the righting guide groove of the uprighting guide rail 12 through the counterweight righting wheel 11b, which can avoid shaking back and forth during the lifting process of the counterweight 11 and reduce the resistance when the counterweight 11 is lifted;
  • the counterweight 11 goes down and stores more net chains; otherwise, the counterweight 11 goes up.
  • the left and right sides of the counterweight 11 are symmetrically provided with mutually parallel uprighting guide rails 12, and the two uprighting guide rails 12 are provided with uprighting guide grooves that extend vertically and have opposite openings;
  • the left and right ends of the counterweight 11 are respectively provided with outwardly extending Counterweight righting rod 11a, the outer ends of two counterweight righting rods 11a are respectively equipped with counterweight righting wheels 11b, and two counterweight righting wheels 11b are respectively located in the righting guide grooves of righting guide rail 12;
  • Two traction springs 10a are suspended symmetrically at both ends of the shaft, and the lower ends of the two traction springs 10a are respectively hinged on the corresponding counterweight centralizing rods 11a.
  • the fixed axis tensioning wheel 9 downstream of the floating tensioning wheel 10 is a driving wheel and is fixed on the tensioning wheel driving shaft 9a.
  • the tractive force produced by the shaft tensioning wheel is compatible with the weight of the counterweight 11 and the drape of the net chain 2.
  • the floating tensioner shaft is flexibly connected with the counterweight centering rod 11a through the traction spring 10a, which can reduce the impact load when the tension is floating, and avoid excessive fluctuation of the network chain.
  • the output end of the tensioning device motor 13 drives the tensioning wheel drive shaft 9a through the one-way bearing 14, and when the speed of travel of the web chain 2 was greater than the speed of the active tensioning wheel, the one-way bearing 14 slipped to avoid interference; the tensioning device
  • the rotating speed of motor 13 is determined according to the drape of net chain 2 and the weight of counterweight 11.
  • the ideal state is to balance the weight of counterweight 90%-100%, so as to avoid the weight of counterweight 11 from bringing the weight of net chain 2.
  • the extra load will affect the slack conveying of the net chain 2, and control the drape of the net chain 2 within the set range.
  • At least one plate chain 6 is provided below the network chain transition section 2b, and the plate chain 6 is wrapped around the plate chain driving wheel 5 and the plate chain driven wheel 7, and the wheel shaft of the plate chain driving wheel 5
  • the output shaft of the plate chain drive motor 4 is driven by a one-way bearing; the tight side of the plate chain 6 is attached to the bottom of the network chain transition section 2b and travels in the same direction, and the middle parts of each link of the plate chain 6 are respectively provided with upright
  • the protruding teeth 6a of the plate chain, and the protruding teeth 6a of the plate chain on the tight side are correspondingly embedded in the tooth grooves of the corresponding chain links of the network chain transition section 2b.
  • the net chain transition section 2b between the two spiral towers is provided with plate chains 6, and according to the width of the net chains, one plate chain 6 can be provided, or two can be arranged symmetrically.
  • the plate chain driving motor 4 drives the plate chain driving wheel 5 to rotate through a one-way bearing, the plate chain driving motor 4 can use a torque control motor, and the one-way bearing can be driven to rotate, so that the plate chain 6 can only compensate for the drive of the network chain transition section 2b No interference will be formed; plate chain driving wheel 5 drives plate chain 6 and net chain transition section 2b to advance in the same direction, and plate chain convex teeth 6a on plate chain 6 are meshed with corresponding links of chain transition section, which can feed the net
  • the chain transition section 2b applies auxiliary driving force to make up for the synchronization error between the two towers.
  • the bottom of the net chain transition section 2b is provided with a pendulum guide rail 8, the top surface of the pendulum guide rail 8 is horizontal and supported on the bottom of the net chain 2, and the top surface middle part of the pendulum guide rail 8 is provided with a pendulum extending along the net chain 2 advancing direction.
  • Car guide rail sinking groove 8a, the tight edge of plate chain 6 is embedded in the swinging car guide rail sinking groove 8a.
  • the sinking groove 8a of the swing car guide rail can include a smooth transition sinking groove horizontal section 8a1 and sinking groove inclined section 8a2, and the sinking groove inclined section 8a2 is inclined downward along the advancing direction of the tight edge of the plate chain, and the tight edge of the plate chain 6 is attached to
  • the bottom of the swing car guide rail sinker 8a is inclined downward, the plate chain driving wheel 5 is positioned at the outlet of the sinker inclined section 8a2, and the pitch circle of the plate chain driving wheel 5 is tangent to the bottom wall of the sinker inclined section 8a2.
  • the swing car guide rail 8 can support the weight of the network chain transition section 2b, avoiding its sagging, and the swing car guide rail sink groove 8a provides accommodation space for the plate chain 6.
  • the protruding tooth 6a of the plate chain meshes with the net chain 2 at the horizontal section 8a1 of the sinker to generate a driving force.
  • the protruding teeth 6a of the plate chain that advance to the sinker inclined section 8a2 end have broken away from the net chain 2 completely, and then enter the arc section of the plate chain driving wheel 5.
  • the distance between the tops of the protruding teeth 6a of adjacent plate chains is obviously greater than that of the root, and the meshing will form interference if they are still not disengaged.
  • a sinker horizontal section 8a1 and a sinker inclined section 8a2 are arranged in front of the plate chain driving wheel 5, and when the plate chain 6 passes through the junction of the sinker horizontal section 8a1 and the sinker inclined section 8a2, two adjacent plate chain convex teeth 6a
  • the variation of the spacing between the tops is much smaller than that of the arc section, which not only ensures the meshing and driving of the plate chain convex teeth 6a in the sinker horizontal section 8a1, but also enables the driven plate chain convex teeth 6a to disengage smoothly.
  • the front and rear sides of the bottom of the swing car guide rail sinker 8a are symmetrically provided with limit grooves 8a3 so that the cross section of the swing car guide rail sinker 8a is in an inverted T shape, and the front and rear sides of each chain link of the plate chain 6 are symmetrically provided with direction
  • the plate chain limiting flashes 6b extending outside, and the plate chain limiting flashes 6b on the front and rear sides of the tight edge of the plate chain are symmetrically embedded in the limiting groove 8a3 at the bottom of the pendulum 8a of the swinging car guide rail.
  • the plate chain limit flash 6b on both sides of the plate chain 6 is embedded in the limit groove 8a3 of the swing car guide rail 8, and the plate chain 6 is limited to the bottom of the swing car guide rail sinking groove 8a to avoid jumping; at the same time, the plate chain 6 When advancing along the bottom of the inclined section 8a2 of the sinker, the protruding teeth 6a of the plate chain are forced to disengage from the tooth grooves of the transition section 2b of the network chain, so as to avoid the formation of locking teeth.
  • the pitch of the plate chain 6 is smaller than the pitch of the net chain 2, for example, the pitch of the plate chain is 1mm smaller than the pitch of the net chain.
  • each left tube guide block 1e and right tube guide block 1f are respectively provided with a guide arc surface and a guide oblique arc surface with a smooth transition, and the guide arc surface is coaxial with the drum and the radius is equal to or smaller than that of the drum.
  • Radius, the middle part of the width direction of the guide inclined arc surface is respectively equipped with inclined arc surface slots extending vertically;
  • the guide inclined arc surface of the left cylinder guide block 1e faces upward, and the lower end of the driving vertical rod 1d of the left cylinder is inserted respectively In the oblique arc groove of the left cylinder guide block 1e.
  • the guide oblique surface of the right cylinder guide block 1f is facing downward, and the upper end of the driving vertical rod 1d of the right cylinder is respectively inserted into the grooves of the oblique arc surface of the right cylinder guide block 1f.
  • the left steering wheel 15 along the web chain 2, the right steering wheel 16 and the fixed axle tensioning wheel 9 can be polygonal sprockets, and the left steering wheel 15 is a driving wheel and is driven by the auxiliary motor 20 of the web chain.
  • the polygonal sprocket is used to replace the traditional light wheel.
  • the polygonal sprocket is matched with the chain link of the network chain 2.
  • the left steering wheel 15 can be driven by the auxiliary motor 20 of the network chain to make up for the lack of power caused by the long conveying distance of the network chain. Avoid transportation difficulties.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
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Abstract

一种螺旋塔输送机，网链（2）呈螺旋状缠绕在转筒（1）的外周且跟随转筒（1）同步转动，网链（2）的各链节靠近转筒（1）的内侧分别设有向筒体方向伸出的驱动头（2f），驱动头（2f）的内缘呈凸弧形，驱动头（2f）的双侧或单侧设有圆弧凹槽，驱动立杆（1d）均匀分布在转筒（1）的外周且与各层驱动头（2f）相啮合；各层网链（2）的底部分别支撑在螺旋环轨（21c）上滑行，各层螺旋环轨（21c）分别固定在径向支撑杆（21b）上，各径向支撑杆（21b）固定在立柱（21a）上，各立柱（21a）以转筒（1）轴线为中心均匀分布。网链（2）从直线行进段经转弯过渡段进入圆弧螺旋段，转弯过渡段的网链（2）外侧强迫松懈的网链（2）内侧调整位置，使内侧适应外侧的周长后，网链（2）内侧的驱动头（2f）才与相应的驱动立杆（1d）啮合。

Description

一种螺旋塔输送机 技术领域
本发明涉及一种输送机，特别涉及一种螺旋塔输送机，属于输送设备技术领域。
背景技术
烘焙食品生产线需要采用高温对食品进行烘烤，从烤炉中取出的高温食品不能马上包装，需要经过较长时间的冷却输送，待食品完全冷却后再进行包装。螺旋塔输送机在占地较小的情况下，提供了很长的输送距离，从而可以获得更长的冷却时间，因而在食品烘焙行业得到了广泛的应用。
现有的螺旋塔输送机存在如下不足之处：1、网链从直线行进段进入转弯过渡段时，网链内侧需要相互靠拢以适应外侧周长的变化，现有的螺旋输送机容易在转弯过渡段发生啮合不畅，或者在网链内侧尚未适应外侧周长变化时，驱动头提前与驱动立杆啮合，使网链内侧受到驱动杆的反向限位，直线行进段对转弯过渡段内侧的牵引受限，网链内侧连续的未适应累积到一定程度会使网链外侧的长度小于理论周长，使网链外侧紧绷。
为减少发生上述现象，现有的螺旋塔输送机需要借助于复杂的辅助结构才能实现网链内侧的驱动头与驱动立杆的啮合，而且需要网链沿塔体行进足够的角度和高度，才能顺利完成驱动头与驱动立杆的啮合。
2、转筒的旋转通常由主驱动链轮通过链条驱动转筒链轮来实现，由于主驱动链轮与转筒链轮之间的传动比比较大，传递的载荷也比较大，主驱动链轮与链条之间容易发生跳齿，影响设备工作的稳定性。
3、由于网链的长度比较长，通常设有张紧装置，配重装置的浮动在对网链长度进行补偿的同时，也给网链施加了额外的拖拽力；且配重块的跳动给网链带来较大的冲击负荷，容易造成冲击性窜动而变形断裂，且更加网链与支撑轨之间的摩损。
4、根据工艺的需要，有时需要采用双塔输送，由于输送距离过长，尤其从过渡段卷绕在第二塔上时，容易造成两塔之间的同步误差，网链的松紧度不一致，不能保证网链始终处于稳定的松弛状态。
发明内容
本发明的目的在于，克服现有技术中存在的问题，提供一种螺旋塔输送机，占地面积小，网链运行及转弯顺畅，可保持在松弛状态平稳前进。
为解决以上技术问题，本发明的一种螺旋塔输送机，包括转筒，网链呈螺旋状缠绕在转筒的外周且跟随转筒同步转动，所述网链的各链节靠近转筒的内侧分别设有向筒体方向伸出的驱动头，所述驱动头的内缘呈凸弧形，所述驱动头的双侧或单侧设有与驱动立杆相吻合的圆弧凹槽，所述驱动立杆均匀分布在所述转筒的外周且与各层驱动头相啮合；各层网链的底部分别支撑在螺旋环轨上滑行，各层螺旋环轨分别固定在径向支撑杆上，各径向支撑杆的外端头分别固定在立柱上，各立柱以转筒轴线为中心均匀分布。
作为本发明的改进，所述网链从直线行进段经转弯过渡段进入圆弧螺旋段，直线 行进段的各链销相互平行，圆弧螺旋段的各链销呈扇形分布；转弯过渡段的网链外侧强迫松懈的网链内侧调整位置，使内侧适应外侧的周长后，网链内侧的驱动头才与相应的驱动立杆啮合。
作为本发明的进一步改进，所述转弯过渡段的下方设有弧形限位板，网链沿弧形限位板的限位弧转向并前进；所述限位弧的半径等于或小于限位弧头端与转筒轴线之间的距离，所述限位弧的轴线偏离转筒轴线使限位弧末端与转筒轴线之间的距离小于限位弧头端与转筒轴线之间的距离。
作为本发明的进一步改进，网链的各链节外侧分别设有向下延伸的限位凸起，各限位凸起分别抵靠在所述弧形限位板的外弧面上滑行。
作为本发明的进一步改进，所述网链的每个链节分别设有贯穿网链幅宽方向的销孔一和销孔二，销孔一和销孔二的横截面为沿网链前进方向延伸的长圆形，网链外侧几个链齿的销孔一的前侧壁沿同一个斜面向前倾斜，网链外侧几个链齿的销孔二的后侧壁沿另一个斜面向后倾斜。
作为本发明的进一步改进，网链的各链节外侧分别设有向下延伸的限位凸起，所述弧形限位板的外弧面底部设有向外延伸的限位飞边，所述限位飞边上固定有多个限位滚轮或限位滚珠，各限位凸起分别抵靠在所述限位滚轮或限位滚珠上滑行。
作为本发明的进一步改进，网链的各链节外侧分别设有向下延伸的限位轴，各限位轴上分别安装有限位轴承，各限位轴承分别抵靠在所述弧形限位板的外弧面上滑行。
作为本发明的进一步改进，网链的各链节外侧分别设有向下延伸的网链支耳，各网链支耳的自由端分别安装有限位滚轮或限位滚珠，各限位滚轮或限位滚珠分别抵靠在所述弧形限位板的外弧面上滑行。
作为本发明的进一步改进，沿转筒的周向均匀设有多根转筒竖杆，各驱动立杆分别固定在相应转筒竖杆的外立面。
作为本发明的进一步改进，各转筒竖杆的一端固定有导向块，导向块位于上升螺旋的转筒底部或位于下降螺旋的转筒顶部，各导向块分别设有光滑过渡的导向圆弧面和导向斜弧面，导向圆弧面与转筒共轴线且半径等于或小于转筒半径，上升螺旋的导向圆弧面朝下，下降螺旋的导向圆弧面朝上，上升螺旋的各驱动立杆从导向斜弧面宽度方向的中部插入并延伸至导向圆弧面底部，下降螺旋的各驱动立杆从导向斜弧面宽度方向的中部插入并延伸至导向圆弧面顶部，各驱动立杆的外缘与导向圆弧面相切；转弯过渡段的网链外侧强迫松懈的网链内侧调整位置，网链内侧沿导向块的导向圆弧面滑行直至网链内侧适应网链外侧的周长后，网链内侧的驱动头才与相应的驱动立杆啮合。
作为本发明的进一步改进，各转筒竖杆的一端固定有浮动块，浮动块位于上升螺旋的转筒底部或位于下降螺旋的转筒顶部，所述浮动块设有弧形凸脊，所述弧形凸脊向网链的前进方向倾斜，上升螺旋的各驱动立杆下端与所述弧形凸脊相拼接，下降螺旋的各驱动立杆上端与所述弧形凸脊相拼接；各弧形凸脊的外缘与驱动立杆的外缘平齐，或各弧形凸脊的外缘高于驱动立杆的外缘；转弯过渡段的网链外侧强迫松懈的网链内侧调整位置，网链内侧沿浮动块的弧形凸脊滑行直至网链内侧适应网链外侧的周长后，网链内侧的驱动头才与相应的驱动立杆啮合。
作为本发明的进一步改进，所述浮动块的背面嵌于相应转筒竖杆的竖向嵌槽中， 所述竖向嵌槽宽度方向的中部设有竖向凸榫，所述竖向凸榫嵌于所述浮动块背面的浮动块嵌槽中；所述竖向凸榫中嵌有浮动弹簧，所述浮动弹簧的另一端嵌于所述浮动块的沉孔中。
作为本发明的进一步改进，所述转弯过渡段的入口安装有内侧链轮和外侧链轮，所述内侧链轮与网链的内侧链节相啮合，所述外侧链轮与网链的外侧链节相啮合所述内侧链轮与外侧链轮的转速及齿数相同，所述外侧链轮的分度圆直径大于内侧链轮的分度圆直径。
作为本发明的进一步改进，所述转筒并排设有两个，网链的网链输入段向右经转弯过渡段后进入左侧转筒的上升螺旋，从左侧转筒的上部沿切向向右进入网链过渡段，所述网链过渡段向右经转弯过渡段后进入右侧转筒的下降螺旋，从右侧转筒的下部沿切向向右进入网链输出段，所述网链输出段经过右转向轮后向左进入网链回程段，所述网链回程段的左端绕过左转向轮与所述网链输入段相连。
作为本发明的进一步改进，两转筒的中心分别通过转筒中心轴支撑在机架上，两转筒的底部分别固定有转筒链轮，两转筒链轮之间设有主驱动链轮和张紧链轮，传动链绕过所述主驱动链轮和张紧链轮且与两转筒链轮传动连接；所述传动链的每个链节包括一对相互平行的外链板，相邻两节外链板的端头之间通过内接头相互铰接，所述内接头的左端为一对相互平行的内链板，所述内链板贴合在前一对外链板的右端内侧且相互连接；所述内接头的右端为啮合端，所述啮合端位于后一对外链板的左端头之间且通过链销一相互铰接，所述啮合端设有斜啮合面；所述主驱动链轮的链齿为梯形齿，所述梯形齿的斜面与所述啮合端下部的斜啮合面相啮合。
作为本发明的进一步改进，两内链板之间设有滚子，所述滚子安装在链销二的中部，所述链销二的两端分别穿过内链板的销孔铆接在前一对外链板的右端头；所述内链板与前一对外链板的右端头连为一体或通过链销二相互铰接。
作为本发明的进一步改进，所述网链过渡段的下方设有至少一道板链，所述板链绕包在板链主动轮和板链从动轮上，所述板链主动轮的轮轴由板链驱动电机的输出轴通过单向轴承驱动；所述板链的紧边贴在网链过渡段的底部且同向行进，所述板链的各链节中部分别设有向上竖起的板链凸齿，紧边的板链凸齿对应嵌于网链过渡段相应链节的齿槽中。
作为本发明的进一步改进，所述网链过渡段的下方设有摆车导轨，所述摆车导轨的顶面水平且支撑在网链的底部，所述摆车导轨的顶面中部设有沿网链前进方向延伸的摆车导轨沉槽，所述板链的紧边嵌于所述摆车导轨沉槽中；所述摆车导轨沉槽包括光滑过渡的沉槽水平段和沉槽倾斜段，且沉槽倾斜段沿板链紧边的前进方向向下倾斜，所述板链的紧边贴靠在摆车导轨沉槽的底部向下倾斜前进，所述板链主动轮位于沉槽倾斜段的出口，且板链主动轮的节圆与所述沉槽倾斜段的底壁相切。
作为本发明的进一步改进，所述摆车导轨沉槽的底部前后两侧对称设有限位凹槽使述摆车导轨沉槽的横截面呈倒置的T形，所述板链各链节的底部前后两侧对称设有向外侧延伸的板链限位飞边，板链紧边前后两侧的板链限位飞边对称嵌于所述摆车导轨沉槽底部的限位凹槽中；所述板链凸齿与网链的链节端头相啮合时，板链凸齿的顶部高于网链的链销上缘，且板链凸齿的啮合面向前进方向凸起；所述板链的节距小于网链的节距。
作为本发明的进一步改进，所述网链回程段设有位于两转筒之间的网链张紧装 置，所述网链张紧装置包括两个定轴张紧轮，两定轴张紧轮之间设有浮动张紧轮，网链张紧段依次绕过右侧的定轴张紧轮、浮动张紧轮及左侧的定轴张紧轮，所述浮动张紧轮的动轴上悬吊有配重块；所述配重块的左右两侧对称设有相互平行的扶正导轨，两扶正导轨设有沿竖向延伸且开口相向的扶正导槽；所述配重块的左右两端分别设有向外延伸的配重扶正杆，两配重扶正杆的外端头分别安装有配重扶正轮，两配重扶正轮分别位于扶正导轨的扶正导槽中；所述浮动张紧轮的动轴两端对称悬吊有牵引弹簧，两牵引弹簧的下端分别铰接在相应的配重扶正杆上；所述浮动张紧轮下游的定轴张紧轮为主动轮且固定在张紧轮主动轴上，张紧装置电机的输出端通过单向轴承驱动所述张紧轮主动轴，主动定轴张紧轮产生的牵引力与配重块的重量及网链的悬垂度相适配。
相对于现有技术，本发明取得了以下有益效果：1、转筒外周的各驱动立杆嵌入驱动头的圆弧凹槽中，既起到啮合传动的作用，又可以避免驱动头向外滑脱。转筒旋转时，各驱动立杆带动网链同步回转，螺旋环轨上可以嵌有垫条，以减小各层网链转动时的滑行阻力。
2、网链从直线行进段进入转弯过渡段的一种实施方式，是通过各链节的限位凸起抵靠在弧形限位板的外弧面上滑行，迫使网链沿弧形限位板限位弧转向并前进，通过弧形限位板设定转弯过渡段的行进路径后，转弯过渡段的网链外侧强迫松懈的网链内侧调整位置，使内侧适应外侧的周长后，网链内侧的驱动头直接与相应的驱动立杆啮合，驱动立杆可以沿转筒的全高度方向延伸，可以无需在驱动立杆的入口端设置导向块。
3、限位弧的入口端向转筒外侧偏离，使入口端的驱动头与驱动立杆间隔一段距离，避免网链内侧的驱动头与驱动立杆提前接触或啮合，避免网链内侧调整位置过程中受限。限位弧的出口端与驱动立杆所在圆周相交，使网链内侧的位置调整到位后，驱动头顺利与驱动立杆啮合。
4、网链进入转弯过渡段时，外侧相互拉紧，内侧相互靠拢，使网链呈扇形以实现转弯，转弯时，链销一靠近网链外侧的一端贴靠在销孔一的前侧壁，为本链节提供拉力；链销二靠近网链外侧的一端贴靠在销孔二的后侧壁，为下个链节提供拉力。
网链外侧几个链齿的销孔一设置前倾斜面后，前倾斜面与平直孔前侧壁形成夹角α，使链销一的外端头接触不到前倾斜面，链销一与销孔一在转弯时的着力点为前倾斜面与平直孔前侧壁的交点，即链销一与销孔一的着力点从最外侧的链齿向内移动了一段距离。
网链外侧几个链齿的销孔二设置后倾斜面后，后倾斜面与平直孔后侧壁形成夹角β，使链销二的外端头接触不到后倾斜面，链销二与销孔二在转弯时的着力点为后倾斜面与平直孔后侧壁的交点，即链销二与销孔二的着力点从最外侧的链齿向内移动了一段距离。
由于网链外侧的限位凸起抵靠在弧形限位板的外弧面上，位于前倾斜面与平直孔前侧壁交点的外侧一段距离，网链着力点位于限位凸起的内侧一段距离，网链转弯时来自限位凸起的摩擦阻力和来自着力点的牵引力使网链内侧进一步向前移动，进入转弯过渡段的驱动头更多，便于适应外侧周长后的驱动头顺利与相应的驱动立杆啮合，且啮合后的网链不会产生大于前段的张力，更好地实现松弛输送。
5、可以在网链外侧自带限位轴承、自带限位滚轮或限位滚珠，或者弧形限位板上自带限位滚轮或限位滚珠等方式，减小网链沿弧形限位板转弯时的阻力。
6、网链进入转弯过渡段的另一种实施方式，是在转筒竖杆的入口端设置导向块， 以上升螺旋为例，驱动立杆延伸至导向圆弧面底部且外缘与导向圆弧面相切，驱动立杆隐藏在导向圆弧面中，使驱动头可以沿导向圆弧面自由滑行，以便网链外侧强迫松懈的网链内侧调整位置，不受驱动立杆的干涉，网链内侧完全适应外侧的周长后，驱动头随网链上升至导向斜弧面的位置，与插接在导向斜弧面上的驱动立杆啮合，导向斜弧面为驱动立杆的两侧提供啮合空间。
7、网链进入转弯过渡段的又一种实施方式，是在转筒竖杆的入口端设置浮动块，以下降螺旋为例，各驱动立杆的上端与浮动块的弧形凸脊相拼接；使驱动头可以沿弧形凸脊自由滑行，以便网链外侧强迫松懈的网链内侧调整位置，不受驱动立杆的干涉，网链内侧完全适应外侧的周长后，驱动头随网链下降至驱动立杆的上端并进入啮合。
浮动块两侧与转筒竖杆的竖向嵌槽的配合，以及竖向凸榫与浮动块嵌槽的配合使浮动块可以在转筒的直径方向浮动，浮动弹簧为浮动块提供向外的弹力，可以补偿网链回转半径的误差，使网链过渡段保持一定张力，尤其对于双塔结构，左侧转筒出口的网链可以正常旋出，无停摆现象，浮动块的弹性可以弥补双塔之间的网链旋出与旋进的误差，使网链内侧可以保持与浮动块的弧形凸脊相贴合，弧形凸脊受力落回在转筒竖杆上，网链继续回转则顺利过渡到下方的驱动立杆上并啮合。
8、啮合端下部的斜啮合面与主驱动链轮的梯形齿相啮合，可以承载的载荷比较大，传动可靠，不容易发生跳齿现象，在其它场景的重负载牵引输送机上也可使用。
9、传动链的每个链节还可以设有两根链销和两个啮合面，转筒链轮的链齿可以与链销二上的滚子相啮合，主驱动链轮的梯形齿与啮合端下部的斜啮合面啮合，既提高了承载能力，又延长了传动链的使用寿命。外链板与内链板可以分体制造，也可以连为一体。
10、由于网链的总长度非常长，网链张紧装置一方面可以使网链适当张紧获得预张紧力，减小网链的悬垂度，另一方面又可以补偿网链因张力或热胀冷缩作用引起的长度变化。配重块的左右两端通过配重扶正轮嵌于扶正导轨的扶正导槽中升降，可以避免配重块的升降过程中前后晃动，减少配重块升降时的阻力；当网链回程段的张力偏小时，配重块下行，同时储存更多的网链；反之则配重块上行。
11、浮动张紧轮轴通过牵引弹簧与配重扶正杆实现柔性连接，可以减少张紧浮动时的冲击负荷，避免网链波动过大。张紧装置电机的输出端通过单向轴承驱动张紧轮主动轴，当网链的行进速度大于主动张紧轮的速度时，单向轴承打滑，避免形成干涉；张紧装置电机的转速根据网链的悬垂度及配重块的重量而定，理想的状态是平衡掉配重块90％-100％的重量，避免配重块的重量给网链带来额外的负载，影响网链的松弛输送，将网链的悬垂度控制在设定的范围内。
12、两螺旋塔之间的网链过渡段设置板链，根据网链的宽度，板链可以设置一道，或者对称设有两道。板链驱动电机通过单向轴承驱动板链主动轮转动，板链驱动电机可以采用扭矩控制电机，单向轴承可以从动转动，保证板链只会补偿网链过渡段的驱动力，不会形成干涉；板链主动轮驱动板链与网链过渡段同向前进，板链上的板链凸齿与链过渡段的相应链节形成啮合，可以给网链过渡段施加辅助驱动力，弥补双塔之间的同步误差。
13、摆车导轨可以支撑网链过渡段的重量，避免其下垂，摆车导轨沉槽为板链提供容纳空间。板链凸齿在沉槽水平段与网链形成啮合，产生驱动力，此时前方的板链凸齿已进入沉槽倾斜段，逐渐下沉脱离网链的链槽，行进至沉槽倾斜段末端的板链凸齿已完全脱离 网链，然后再进入板链主动轮的圆弧段。由于板链进入圆弧段时，相邻板链凸齿的顶部之间间距明显大于根部，如此时仍未脱离啮合将形成干涉。本发明在板链主动轮前方设置沉槽水平段与沉槽倾斜段，板链经过沉槽水平段与沉槽倾斜段的交界处时，相邻两板链凸齿顶部之间的间距变化远比圆弧段的变化小，既保证了板链凸齿在沉槽水平段的啮合驱动，又使得驱动后的板链凸齿可以顺利脱离啮合。
14、板链前后两侧的板链限位飞边嵌于摆车导轨的限位凹槽中，将板链限制在摆车导轨沉槽的底部，避免跳动；同时板链沿沉槽倾斜段的底部前进时，迫使板链凸齿从网链过渡段的齿槽中脱离，避免形成卡齿。
15、板链凸齿高于网链的链销，且啮合面向前进方向凸起，有利于在向网链施加前进动力的同时，施加指向摆车导轨顶面的分力，使网链稳定支撑在摆车导轨上，避免其跳动。工作中，只要一个板链凸齿对网链形成有效驱动即可，板链的节距略小于网链的节距，例如板链节距比网链节距小1mm，移动数个节距后，前段的啮合面相互之间有了一定的间隙，沉槽水平段的板链凸齿处于啮合驱动状态时，进入沉槽倾斜段的板链凸齿可以更顺利地脱离网链的链槽，进一步降低干涉的可能性。
附图说明
下面结合附图和具体实施方式对本发明作进一步详细的说明，附图仅提供参考与说明用，非用以限制本发明。
图1为本发明螺旋塔输送机的立体图；
图2为本发明螺旋塔输送机的立体剖视图；
图3为本发明螺旋塔输送机的主视图；
图4为图3的俯视图；
图5为图3的后视图；
图6为图4中沿A-A的剖视图；
图7为图4中沿B-B的剖视图；
图8为网链经转弯过渡段后直接与驱动立杆啮合时的仰视图；
图9为转弯过渡段带弧形限位板的仰视立体图；
图10为弧形限位板自带限位滚珠的示意图；
图11为网链自带限位轴承的示意图；
图12为网链自带限位滚珠的示意图；
图13为网链某链节的剖视图；
图14为带导向块时网链经转弯过渡段与驱动立杆啮合时的状态图；
图15为驱动立杆下端从导向斜弧面插入并延伸至导向圆弧面底部的立体图；
图16为驱动立杆下端设置浮动块时的立体图；
图17为浮动块与转筒竖杆相配合部位的爆炸图；
图18为本发明中传动链的实施例一；
图19为图18中一个链节的俯视图；
图20为图19中沿C-C的剖视图；
图21为本发明中传动链的实施例二；
图22为板链辅助驱动网链过渡段的主视图；
图23为图22的立体图；
图24为张紧装置电机驱动网链张紧段的主视图；
图25为浮动张紧轮通过牵引弹簧悬吊配重块的状态图。
图中：1.转筒；1a.转筒中心轴；1b.转筒竖杆；1b1.竖向嵌槽；1b2.竖向凸榫；1c.转筒链轮；1d.驱动立杆；1e.左筒导向块；1f.右筒导向块；1f1.导向圆弧面；1f2.导向斜弧面；1g.浮动块；1g1.弧形凸脊；1g2.浮动块嵌槽；1g3.浮动弹簧；
2.网链；2a.网链输入段；2b.网链过渡段；2c.网链输出段；2d.网链回程段；2e.网链张紧段；2f.驱动头；2g.限位凸起；2h.销孔一；2j.销孔二；2k.网链支耳；2m.限位滚珠；2n.限位轴承；
3.传动链；3a.外链板；3b.内接头；3b1.啮合端；3b2.斜啮合面；3b3.内链板；3c.滚子；3d.链销一；3e.链销二；4.板链驱动电机；5.板链主动轮；6.板链；6a.板链凸齿；6b.板链限位飞边；7.板链从动轮；8.摆车导轨；8a.摆车导轨沉槽；8a1.沉槽水平段；8a2.沉槽倾斜段；8a3.限位凹槽；9.定轴张紧轮；9a.张紧轮主动轴；10.浮动张紧轮；10a.牵引弹簧；11.配重块；11a.配重扶正杆；11b.配重扶正轮；12.扶正导轨；13.张紧装置电机；14.单向轴承；15.左转向轮；16.右转向轮；17.主驱动电机减速机；18.主驱动链轮；18a.梯形齿；19.张紧链轮；20.网链辅助电机；21.机架；21a.立柱；21b.径向支撑杆；21c.螺旋环轨；21d.垫条；22.弧形限位板；23.内侧链轮；24.外侧链轮。
具体实施方式
在本发明的以下描述中，术语“前”、“后”、“左”、“右”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指装置必须具有特定的方位，本输送机可以按图示方向的镜像布置。
如图1至图7所示，本发明的螺旋塔输送机包括转筒1，网链2呈螺旋状缠绕在转筒1的外周且跟随转筒1同步转动，网链2的各链节靠近转筒1的内侧分别设有向筒体方向伸出的驱动头2f，驱动头2f的内缘呈凸弧形，驱动头2f的双侧或单侧设有与驱动立杆1d相吻合的圆弧凹槽，驱动立杆1d均匀分布在转筒1的外周且与各层驱动头2f相啮合；各驱动立杆1d嵌入驱动头2f的圆弧凹槽中，既起到啮合传动的作用，又可以避免驱动头2f向外滑脱。各层网链2的底部分别支撑在螺旋环轨21c上滑行，螺旋环轨21c上可以嵌有垫条21d，以减小各层网链2转动时的滑行阻力，各层螺旋环轨21c分别固定在径向支撑杆21b上，各径向支撑杆21b的外端头分别固定在立柱21a上，各立柱21a以转筒轴线为中心均匀分布。转筒1旋转时，各驱动立杆1d带动网链2同步回转。
网链2从直线行进段经转弯过渡段进入圆弧螺旋段，直线行进段的各链销相互平行，圆弧螺旋段的各链销呈扇形分布；转弯过渡段的网链外侧强迫松懈的网链内侧调整位置，使内侧适应外侧的周长后，网链内侧的驱动头2f才与相应的驱动立杆1d啮合。
沿转筒1的周向均匀设有多根转筒竖杆1b，各驱动立杆1d分别固定在相应转筒竖杆1b的外立面。
图8、图9所示为网链2从直线行进段进入转弯过渡段的一种实施方式，是转弯过渡段的下方设有弧形限位板22，网链2沿弧形限位板22的限位弧转向并前进，限位弧表面可以 进行硬化处理。
网链2的各链节外侧分别设有向下延伸的限位凸起2g，各限位凸起2g分别抵靠在弧形限位板22的外弧面上滑行。通过各链节的限位凸起2g抵靠在弧形限位板22的外弧面上滑行，迫使网链2沿弧形限位板22限位弧转向并前进，通过弧形限位板22设定转弯过渡段的行进路径后，转弯过渡段的网链外侧强迫松懈的网链内侧调整位置，使内侧适应外侧的周长后，网链内侧的驱动头2f直接与相应的驱动立杆1d啮合，驱动立杆1d可以沿转筒1的全高度方向延伸，可以无需在驱动立杆1d的入口端设置导向块。
如图8所示，限位弧的半径等于或小于限位弧头端与转筒轴线之间的距离，限位弧的轴线偏离转筒轴线使限位弧末端与转筒轴线之间的距离小于限位弧头端与转筒轴线之间的距离。限位弧的入口端向转筒外侧偏离，使入口端的驱动头2f与驱动立杆1d间隔一段距离，避免网链内侧的驱动头2f与驱动立杆1d提前接触或啮合，避免网链内侧调整位置过程中受限。限位弧的出口端与驱动立杆1d所在圆周相交，使网链内侧的位置调整到位后，驱动头2f顺利与驱动立杆1d啮合。
可以采取多种方式减小网链2沿弧形限位板22转弯时的阻力，如图10所示，网链2的各链节外侧分别设有向下延伸的限位凸起2g，弧形限位板22的外弧面底部设有向外延伸的限位飞边，限位飞边上固定有多个限位滚轮或限位滚珠2m，各限位凸起2g分别抵靠在限位滚轮或限位滚珠2m上滑行。
如图11所示，网链2的各链节外侧分别设有向下延伸的限位轴，各限位轴上分别安装有限位轴承2n，各限位轴承2n分别抵靠在弧形限位板22的外弧面上滑行。
如图12所示，网链2的各链节外侧分别设有向下延伸的网链支耳2k，各网链支耳2k的自由端分别安装有限位滚轮或限位滚珠2m，各限位滚轮或限位滚珠分别抵靠在弧形限位板22的外弧面上滑行。
如图13所示，网链2的每个链节分别设有贯穿网链幅宽方向的销孔一2h和销孔二2j，销孔一2h和销孔二2j的横截面为沿网链前进方向延伸的长圆形，网链外侧几个链齿的销孔一2h的前侧壁沿同一个斜面向前倾斜，网链外侧几个链齿的销孔二2j的后侧壁沿另一个斜面向后倾斜。
网链2进入转弯过渡段时，外侧相互拉紧，内侧相互靠拢，使网链2呈扇形以实现转弯，转弯时，链销一靠近网链外侧的一端贴靠在销孔一2h的前侧壁，为本链节提供拉力；链销二靠近网链外侧的一端贴靠在销孔二2j的后侧壁，为下个链节提供拉力。
网链外侧几个链齿的销孔一2h设置前倾斜面后，前倾斜面与平直孔前侧壁形成夹角α，使链销一的外端头接触不到前倾斜面，链销一与销孔一2h在转弯时的着力点为前倾斜面与平直孔前侧壁的交点，即链销一与销孔一2h的着力点从最外侧的链齿向内移动了一段距离。
网链外侧几个链齿的销孔二2j设置后倾斜面后，后倾斜面与平直孔后侧壁形成夹角β，使链销二的外端头接触不到后倾斜面，链销二与销孔二2j在转弯时的着力点为后倾斜面与平直孔后侧壁的交点，即链销二与销孔二2j的着力点从最外侧的链齿向内移动了一段距离。
由于网链外侧的限位凸起2g抵靠在弧形限位板22的外弧面上，位于前倾斜面与平直孔前侧壁交点的外侧一段距离，网链着力点位于限位凸起2g的内侧一段距离，网链转弯 时来自限位凸起2g的摩擦阻力和来自着力点的牵引力使网链内侧进一步向前移动，进入转弯过渡段的驱动头2f更多，便于适应外侧周长后的驱动头2f顺利与相应的驱动立杆1d啮合，且啮合后的网链不会产生大于前段的张力，更好地实现松弛输送。
如图14、图15所示，网链进入转弯过渡段的另一种实施方式，是各转筒竖杆1b的一端固定有导向块，导向块位于上升螺旋的转筒底部或位于下降螺旋的转筒顶部，各导向块分别设有光滑过渡的导向圆弧面和导向斜弧面，导向圆弧面与转筒共轴线且半径等于或小于转筒半径，上升螺旋的导向圆弧面朝下，下降螺旋的导向圆弧面朝上，上升螺旋的各驱动立杆1d从导向斜弧面宽度方向的中部插入并延伸至导向圆弧面底部，下降螺旋的各驱动立杆1d从导向斜弧面宽度方向的中部插入并延伸至导向圆弧面顶部，各驱动立杆1d的外缘与导向圆弧面相切；转弯过渡段的网链外侧强迫松懈的网链内侧调整位置，网链内侧沿导向块的导向圆弧面滑行直至网链内侧适应网链外侧的周长后，网链内侧的驱动头2f才与相应的驱动立杆1d啮合。
在转筒竖杆1b的入口端设置导向块，以上升螺旋为例，驱动立杆1d延伸至导向圆弧面底部且外缘与导向圆弧面相切，驱动立杆隐藏在导向圆弧面中，使驱动头2f可以沿导向圆弧面自由滑行，以便网链外侧强迫松懈的网链内侧调整位置，不受驱动立杆的干涉，网链内侧完全适应外侧的周长后，驱动头2f随网链上升至导向斜弧面的位置，与插接在导向斜弧面上的驱动立杆1d啮合，导向斜弧面为驱动立杆1d的两侧提供啮合空间。
如图16、图17所示，网链2进入转弯过渡段的又一种实施方式，是各转筒竖杆1b的一端固定有浮动块1g，浮动块1g位于上升螺旋的转筒底部或位于下降螺旋的转筒顶部，浮动块1g设有弧形凸脊1g1，弧形凸脊1g1向网链2的前进方向倾斜，上升螺旋的各驱动立杆1d下端与弧形凸脊1g1相拼接，下降螺旋的各驱动立杆1d上端与弧形凸脊1g1相拼接；各弧形凸脊1g1的外缘与驱动立杆1d的外缘平齐，或各弧形凸脊1g1的外缘高于驱动立杆1d的外缘；转弯过渡段的网链外侧强迫松懈的网链内侧调整位置，网链内侧沿浮动块1g的弧形凸脊1g1滑行直至网链内侧适应网链外侧的周长后，网链内侧的驱动头2f才与相应的驱动立杆1d啮合。
以下降螺旋为例，各驱动立杆1d的上端与浮动块1g的弧形凸脊1g1相拼接；使驱动头2f可以沿弧形凸脊1g1自由滑行，以便网链外侧强迫松懈的网链内侧调整位置，不受驱动立杆的干涉，网链内侧完全适应外侧的周长后，驱动头2f随网链2下降至驱动立杆1d的上端并进入啮合。
浮动块1g的背面嵌于相应转筒竖杆1b的竖向嵌槽1b1中，竖向嵌槽1b1宽度方向的中部设有竖向凸榫1b2，竖向凸榫1b2嵌于浮动块1g背面的浮动块嵌槽1g2中；竖向凸榫1b2中嵌有浮动弹簧1g3，浮动弹簧1g3的另一端嵌于浮动块1g的沉孔中。浮动块1g两侧与转筒竖杆1b的竖向嵌槽1b1的配合，以及竖向凸榫1b2与浮动块嵌槽1g2的配合使浮动块1g可以在转筒的直径方向浮动，浮动弹簧1g3为浮动块1g提供向外的弹力，可以补偿网链回转半径的误差，使网链过渡段保持一定张力，尤其对于双塔结构，左侧转筒出口的网链可以正常旋出，无停摆现象，浮动块1g的弹性可以弥补双塔之间的网链旋出与旋进的误差，使网链内侧可以保持与浮动块1g的弧形凸脊1g1相贴合，弧形凸脊1g1受力落回在转筒竖杆1b上，网链2继续回转则顺利过渡到下方的驱动立杆1d上并啮合。
如图9所示，转弯过渡段的入口可以安装有内侧链轮23和外侧链轮24，内侧链轮23 与网链2的内侧链节相啮合，外侧链轮24与网链2的外侧链节相啮合；内侧链轮23与外侧链轮24的转速相同，可以由扭矩电机辅助牵引，外侧链轮24的分度圆直径大于内侧链轮23的分度圆直径。
如图1至图7所示，转筒1可以并排设有两个，左侧转筒的各驱动立杆1d的下端分别设有左筒导向块1e，右侧转筒的各驱动立杆1d的上端分别设有右筒导向块1f；网链2的网链输入段2a向右延伸且沿切向进入左侧转筒下部的左筒导向块1e外周，沿左侧转筒的外周呈螺旋状缠绕上升，从左侧转筒的上部沿切向向右进入网链过渡段2b，网链过渡段2b向右沿切向进入右侧转筒上部的右筒导向块1f外周，沿右侧转筒的外周呈螺旋状缠绕下降，从右侧转筒的下部沿切向向右进入网链输出段2c，网链输出段2c经过右转向轮16后向左进入网链回程段2d，网链回程段2d的左端绕过左转向轮15与网链输入段2a相连。
网链输入段2a从左转向轮15导出后，沿切向进入左筒导向块1e的导向圆弧面，行进后向上倾斜缠绕，进入左筒导向块1e的导向斜弧面，沿左侧转筒圆周均匀分布的各驱动立杆1d分别勾住网链2靠近转筒内侧的驱动头2f，带动网链2绕转筒回转盘升至左侧转筒的顶部，沿切向导出进入网链过渡段2b，然后沿切向进入右筒导向块1f的导向圆弧面1f1，行进后向下倾斜缠绕，进入右筒导向块1f的导向斜弧面1f2，沿右侧转筒圆周均匀分布的各驱动立杆1d分别勾住网链2靠近转筒内侧的驱动头2f，带动网链2绕转筒回转下降至右侧转筒的底部，沿切向导出进入网链输出段2c，向右经右转向轮16转向后，向左进入网链回程段2d及网链张紧段2e，然后绕过左转向轮15后重新进入网链输入段2a。如此实现了网链2在两塔中的长距离持续循环回转。
两转筒的中心分别通过转筒中心轴1a支撑在机架21上，两转筒的底部分别固定有转筒链轮1c，两转筒链轮1c之间设有主驱动链轮18和张紧链轮19，传动链3呈S形绕过主驱动链轮18和张紧链轮19且与两转筒链轮1c传动连接，主驱动链轮18安装在主驱动电机减速机17的输出轴上，主驱动电机减速机17固定在附近的机架21上。
如图18至图20所示，传动链3包括依次相连的多个链节，每个链节包括一对相互平行的外链板3a，相邻两节外链板3a的端头之间通过内接头3b相互铰接，内接头3b的左端为一对相互平行的内链板3b3，内链板3b3贴合在前一对外链板的右端内侧且相互连接；内接头3b的右端为啮合端3b1，啮合端3b1位于后一对外链板的左端头之间且通过链销一3d相互铰接，啮合端3b1设有斜啮合面3b2。啮合端3b1下部的斜啮合面3b2与主驱动链轮18的梯形齿相啮合，可以承载的载荷比较大，传动可靠，不容易发生跳齿现象，在其它场景的重负载牵引输送机上也可使用。
两内链板3b3之间设有滚子3c，滚子3c安装在链销二3e的中部，链销二3e的两端分别穿过内链板3b3的销孔铆接在前一对外链板的右端头，外链板3a与内链板3b3可以分体制造，内链板3b3与前一对外链板的右端头通过链销二3e相互铰接。传动链3的每个链节还可以设有两根链销和两个啮合面，转筒链轮1c的链齿可以与链销二3e上的滚子3c相啮合，主驱动链轮18的梯形齿与啮合端3b1下部的斜啮合面3b2啮合，既提高了承载能力，又延长了传动链3的使用寿命。
图21所示为传动链3的另一种实施例，内链板3b3可以与前一对外链板3a的右端头连为一体。
滚子3c与转筒链轮1c的链齿相啮合，主驱动链轮18的链齿为梯形齿，梯形齿的斜 面与啮合端下部的斜啮合面3b2相啮合。
转筒还可以采用的另一种驱动方式为：即左侧转筒及右侧转筒分别由两台联动的伺服电机同步驱动。
转筒还可以采用的又一种驱动方式为：左侧转筒及右侧转筒共用一台主驱动电机减速机17，主驱动电机减速机17的输出轴上安装有两个主驱动链轮18，两主驱动链轮18分别通过各自的传动链驱动相应的转筒链轮1c。
如图1、图3、图24及图25所示，网链回程段2d设有位于两转筒之间的网链张紧装置，网链张紧装置包括两个定轴张紧轮9，两定轴张紧轮9之间设有浮动张紧轮10，网链张紧段2e依次绕过右侧的定轴张紧轮9、浮动张紧轮10及左侧的定轴张紧轮9，浮动张紧轮10的动轴上悬吊有配重块11。
由于网链2的总长度非常长，网链张紧装置一方面可以使网链2适当张紧获得预张紧力，减小网链的悬垂度，另一方面又可以补偿网链因张力或热胀冷缩作用引起的长度变化。配重块11的左右两端通过配重扶正轮11b嵌于扶正导轨12的扶正导槽中升降，可以避免配重块11的升降过程中前后晃动，减少配重块11升降时的阻力；当网链回程段2d的张力偏小时，配重块11下行，同时储存更多的网链；反之则配重块11上行。
配重块11的左右两侧对称设有相互平行的扶正导轨12，两扶正导轨12设有沿竖向延伸且开口相向的扶正导槽；配重块11的左右两端分别设有向外延伸的配重扶正杆11a，两配重扶正杆11a的外端头分别安装有配重扶正轮11b，两配重扶正轮11b分别位于扶正导轨12的扶正导槽中；浮动张紧轮10的动轴两端对称悬吊有牵引弹簧10a，两牵引弹簧10a的下端分别铰接在相应的配重扶正杆11a上。
浮动张紧轮10下游的定轴张紧轮9为主动轮且固定在张紧轮主动轴9a上，张紧装置电机13的输出端通过单向轴承14驱动张紧轮主动轴9a，主动定轴张紧轮产生的牵引力与配重块11的重量及网链2的悬垂度相适配。
浮动张紧轮轴通过牵引弹簧10a与配重扶正杆11a实现柔性连接，可以减少张紧浮动时的冲击负荷，避免网链波动过大。张紧装置电机13的输出端通过单向轴承14驱动张紧轮主动轴9a，当网链2的行进速度大于主动张紧轮的速度时，单向轴承14打滑，避免形成干涉；张紧装置电机13的转速根据网链2的悬垂度及配重块11的重量而定，理想的状态是平衡掉配重块90％-100％的重量，避免配重块11的重量给网链2带来额外的负载，影响网链2的松弛输送，将网链2的悬垂度控制在设定的范围内。
如图22、图23所示，网链过渡段2b的下方设有至少一道板链6，板链6绕包在板链主动轮5和板链从动轮7上，板链主动轮5的轮轴由板链驱动电机4的输出轴通过单向轴承驱动；板链6的紧边贴在网链过渡段2b的底部且同向行进，板链6的各链节中部分别设有向上竖起的板链凸齿6a，紧边的板链凸齿6a对应嵌于网链过渡段2b相应链节的齿槽中。
两螺旋塔之间的网链过渡段2b设置板链6，根据网链的宽度，板链6可以设置一道，或者对称设有两道。板链驱动电机4通过单向轴承驱动板链主动轮5转动，板链驱动电机4可以采用扭矩控制电机，单向轴承可以从动转动，保证板链6只会补偿网链过渡段2b的驱动力，不会形成干涉；板链主动轮5驱动板链6与网链过渡段2b同向前进，板链6上的板链凸齿6a与链过渡段的相应链节形成啮合，可以给网链过渡段2b施加辅助驱动力，弥补双塔之间的同步误差。
网链过渡段2b的下方设有摆车导轨8，摆车导轨8的顶面水平且支撑在网链2的底部，摆车导轨8的顶面中部设有沿网链2前进方向延伸的摆车导轨沉槽8a，板链6的紧边嵌于摆车导轨沉槽8a中。摆车导轨沉槽8a可以包括光滑过渡的沉槽水平段8a1和沉槽倾斜段8a2，且沉槽倾斜段8a2沿板链紧边的前进方向向下倾斜，板链6的紧边贴靠在摆车导轨沉槽8a的底部向下倾斜前进，板链主动轮5位于沉槽倾斜段8a2的出口，且板链主动轮5的节圆与沉槽倾斜段8a2的底壁相切。
摆车导轨8可以支撑网链过渡段2b的重量，避免其下垂，摆车导轨沉槽8a为板链6提供容纳空间。板链凸齿6a在沉槽水平段8a1与网链2形成啮合，产生驱动力，此时前方的板链凸齿6a已进入沉槽倾斜段8a2，逐渐下沉脱离网链2的链槽，行进至沉槽倾斜段8a2末端的板链凸齿6a已完全脱离网链2，然后再进入板链主动轮5的圆弧段。由于板链6进入圆弧段时，相邻板链凸齿6a的顶部之间间距明显大于根部，如此时仍未脱离啮合将形成干涉。本发明在板链主动轮5前方设置沉槽水平段8a1与沉槽倾斜段8a2，板链6经过沉槽水平段8a1与沉槽倾斜段8a2的交界处时，相邻两板链凸齿6a顶部之间的间距变化远比圆弧段的变化小，既保证了板链凸齿6a在沉槽水平段8a1的啮合驱动，又使得驱动后的板链凸齿6a可以顺利脱离啮合。
摆车导轨沉槽8a的底部前后两侧对称设有限位凹槽8a3使述摆车导轨沉槽8a的横截面呈倒置的T形，板链6各链节的底部前后两侧对称设有向外侧延伸的板链限位飞边6b，板链紧边前后两侧的板链限位飞边6b对称嵌于摆车导轨沉槽8a底部的限位凹槽8a3中。板链6前后两侧的板链限位飞边6b嵌于摆车导轨8的限位凹槽8a3中，将板链6限制在摆车导轨沉槽8a的底部，避免跳动；同时板链6沿沉槽倾斜段8a2的底部前进时，迫使板链凸齿6a从网链过渡段2b的齿槽中脱离，避免形成卡齿。
板链凸齿6a与网链2的链节端头相啮合时，板链凸齿6a的顶部高于网链2的链销上缘，且板链凸齿6a的啮合面向前进方向凸起，有利于在向网链2施加前进动力的同时，施加指向摆车导轨顶面的分力，使网链2稳定支撑在摆车导轨8上，避免其跳动。
工作中，只要一个板链凸齿6a对网链2形成有效驱动即可。板链6的节距小于网链2的节距，例如板链节距比网链节距小1mm，移动数个节距后，前段的啮合面相互之间有了一定的间隙，沉槽水平段8a1的板链凸齿6a处于啮合驱动状态时，进入沉槽倾斜段8a2的板链凸齿6a可以更顺利地脱离网链2的链槽，进一步降低干涉的可能性。
如图5所示，各左筒导向块1e及右筒导向块1f分别设有光滑过渡的导向圆弧面和导向斜弧面，导向圆弧面与转筒共轴线且半径等于或小于转筒半径，导向斜弧面宽度方向的中部分别设有沿竖向延伸的斜弧面嵌槽；左筒导向块1e的导向斜弧面朝上，左侧转筒的驱动立杆1d下端分别插接在左筒导向块1e的斜弧面嵌槽中。右筒导向块1f的导向斜弧面朝下，右侧转筒的驱动立杆1d上端分别插接在右筒导向块1f的斜弧面嵌槽中。
网链2沿程的左转向轮15、右转向轮16及定轴张紧轮9可以均为多边形链轮，左转向轮15为主动轮且由网链辅助电机20驱动。采用多边形链轮替代传统的光轮，多边形链轮与网链2的链节配合，左转向轮15可以由网链辅助电机20进行辅助驱动，弥补网链由于输送距离较长导致的动力不足，避免出现输送困难。
以上所述仅为本发明之较佳可行实施例而已，非因此局限本发明的专利保护范围。除上述实施例外，本发明还可以有其他实施方式。凡采用等同替换或等效变换形成的技 术方案，均落在本发明要求的保护范围内。本发明未经描述的技术特征可以通过或采用现有技术实现，在此不再赘述。

Claims (20)

  1. 一种螺旋塔输送机，包括转筒，网链呈螺旋状缠绕在转筒的外周且跟随转筒同步转动，其特征在于：所述网链的各链节靠近转筒的内侧分别设有向筒体方向伸出的驱动头，所述驱动头的内缘呈凸弧形，所述驱动头的双侧或单侧设有与驱动立杆相吻合的圆弧凹槽，所述驱动立杆均匀分布在所述转筒的外周且与各层驱动头相啮合；各层网链的底部分别支撑在螺旋环轨上滑行，各层螺旋环轨分别固定在径向支撑杆上，各径向支撑杆的外端头分别固定在立柱上，各立柱以转筒轴线为中心均匀分布。
  2. 根据权利要求1所述的螺旋塔输送机，其特征在于：所述网链从直线行进段经转弯过渡段进入圆弧螺旋段，直线行进段的各链销相互平行，圆弧螺旋段的各链销呈扇形分布；转弯过渡段的网链外侧强迫松懈的网链内侧调整位置，使内侧适应外侧的周长后，网链内侧的驱动头才与相应的驱动立杆啮合。
  3. 根据权利要求1所述的螺旋塔输送机，其特征在于：所述转弯过渡段的下方设有弧形限位板，网链沿弧形限位板的限位弧转向并前进；所述限位弧的半径等于或小于限位弧头端与转筒轴线之间的距离，所述限位弧的轴线偏离转筒轴线使限位弧末端与转筒轴线之间的距离小于限位弧头端与转筒轴线之间的距离。
  4. 根据权利要求3所述的螺旋塔输送机，其特征在于：网链的各链节外侧分别设有向下延伸的限位凸起，各限位凸起分别抵靠在所述弧形限位板的外弧面上滑行。
  5. 根据权利要求4所述的螺旋塔输送机，其特征在于：所述网链的每个链节分别设有贯穿网链幅宽方向的销孔一和销孔二，销孔一和销孔二的横截面为沿网链前进方向延伸的长圆形，网链外侧几个链齿的销孔一的前侧壁沿同一个斜面向前倾斜，网链外侧几个链齿的销孔二的后侧壁沿另一个斜面向后倾斜。
  6. 根据权利要求3所述的螺旋塔输送机，其特征在于：网链的各链节外侧分别设有向下延伸的限位凸起，所述弧形限位板的外弧面底部设有向外延伸的限位飞边，所述限位飞边上固定有多个限位滚轮或限位滚珠，各限位凸起分别抵靠在所述限位滚轮或限位滚珠上滑行。
  7. 根据权利要求3所述的螺旋塔输送机，其特征在于：网链的各链节外侧分别设有向下延伸的限位轴，各限位轴上分别安装有限位轴承，各限位轴承分别抵靠在所述弧形限位板的外弧面上滑行。
  8. 根据权利要求3所述的螺旋塔输送机，其特征在于：网链的各链节外侧分别设有向下延伸的网链支耳，各网链支耳的自由端分别安装有限位滚轮或限位滚珠，各限位滚轮或限位滚珠分别抵靠在所述弧形限位板的外弧面上滑行。
  9. 根据权利要求1所述的螺旋塔输送机，其特征在于：沿转筒的周向均匀设有多根转筒竖杆，各驱动立杆分别固定在相应转筒竖杆的外立面。
  10. 根据权利要求9所述的螺旋塔输送机，其特征在于：各转筒竖杆的一端固定有导向块，导向块位于上升螺旋的转筒底部或位于下降螺旋的转筒顶部，各导向块分别设有光滑过渡的导向圆弧面和导向斜弧面，导向圆弧面与转筒共轴线且半径等于或小于转筒半径，上升螺旋的导向圆弧面朝下，下降螺旋的导向圆弧面朝上，上升螺旋的各驱动立杆从导向斜弧面宽度方向的中部插入并延伸至导向圆弧面底部，下降螺旋的各驱动立杆从导向斜弧面宽度方向的中部插入并延伸至导向圆弧面顶部，各驱动立杆的外缘与导向圆弧面相切；转弯过渡段的网链外侧强迫松懈的网链内侧调整位置，网链内侧沿导向块的导向圆弧面滑 行直至网链内侧适应网链外侧的周长后，网链内侧的驱动头才与相应的驱动立杆啮合。
  11. 根据权利要求9所述的螺旋塔输送机，其特征在于：各转筒竖杆的一端固定有浮动块，浮动块位于上升螺旋的转筒底部或位于下降螺旋的转筒顶部，所述浮动块设有弧形凸脊，所述弧形凸脊向网链的前进方向倾斜，上升螺旋的各驱动立杆下端与所述弧形凸脊相拼接，下降螺旋的各驱动立杆上端与所述弧形凸脊相拼接；各弧形凸脊的外缘与驱动立杆的外缘平齐，或各弧形凸脊的外缘高于驱动立杆的外缘；转弯过渡段的网链外侧强迫松懈的网链内侧调整位置，网链内侧沿浮动块的弧形凸脊滑行直至网链内侧适应网链外侧的周长后，网链内侧的驱动头才与相应的驱动立杆啮合。
  12. 根据权利要求11所述的螺旋塔输送机，其特征在于：所述浮动块的背面嵌于相应转筒竖杆的竖向嵌槽中，所述竖向嵌槽宽度方向的中部设有竖向凸榫，所述竖向凸榫嵌于所述浮动块背面的浮动块嵌槽中；所述竖向凸榫中嵌有浮动弹簧，所述浮动弹簧的另一端嵌于所述浮动块的沉孔中。
  13. 根据权利要求2所述的螺旋塔输送机，其特征在于：所述转弯过渡段的入口安装有内侧链轮和外侧链轮，所述内侧链轮与网链的内侧链节相啮合，所述外侧链轮与网链的外侧链节相啮合所述内侧链轮与外侧链轮的转速及齿数相同，所述外侧链轮的分度圆直径大于内侧链轮的分度圆直径。
  14. 根据权利要求10所述的螺旋塔输送机，其特征在于：所述转筒并排设有两个，网链的网链输入段向右经转弯过渡段后进入左侧转筒的上升螺旋，从左侧转筒的上部沿切向向右进入网链过渡段，所述网链过渡段向右经转弯过渡段后进入右侧转筒的下降螺旋，从右侧转筒的下部沿切向向右进入网链输出段，所述网链输出段经过右转向轮后向左进入网链回程段，所述网链回程段的左端绕过左转向轮与所述网链输入段相连。
  15. 根据权利要求2所述的螺旋塔输送机，其特征在于：两转筒的中心分别通过转筒中心轴支撑在机架上，两转筒的底部分别固定有转筒链轮，两转筒链轮之间设有主驱动链轮和张紧链轮，传动链绕过所述主驱动链轮和张紧链轮且与两转筒链轮传动连接；所述传动链的每个链节包括一对相互平行的外链板，相邻两节外链板的端头之间通过内接头相互铰接，所述内接头的左端为一对相互平行的内链板，所述内链板贴合在前一对外链板的右端内侧且相互连接；所述内接头的右端为啮合端，所述啮合端位于后一对外链板的左端头之间且通过链销一相互铰接，所述啮合端设有斜啮合面；所述主驱动链轮的链齿为梯形齿，所述梯形齿的斜面与所述啮合端下部的斜啮合面相啮合。
  16. 根据权利要求15所述的螺旋塔输送机，其特征在于：两内链板之间设有滚子，所述滚子安装在链销二的中部，所述链销二的两端分别穿过内链板的销孔铆接在前一对外链板的右端头；所述内链板与前一对外链板的右端头连为一体或通过链销二相互铰接。
  17. 根据权利要求15所述的螺旋塔输送机，其特征在于：所述网链过渡段的下方设有至少一道板链，所述板链绕包在板链主动轮和板链从动轮上，所述板链主动轮的轮轴由板链驱动电机的输出轴通过单向轴承驱动；所述板链的紧边贴在网链过渡段的底部且同向行进，所述板链的各链节中部分别设有向上竖起的板链凸齿，紧边的板链凸齿对应嵌于网链过渡段相应链节的齿槽中。
  18. 根据权利要求17所述的螺旋塔输送机，其特征在于：所述网链过渡段的下方设有摆车导轨，所述摆车导轨的顶面水平且支撑在网链的底部，所述摆车导轨的顶面中部设有沿 网链前进方向延伸的摆车导轨沉槽，所述板链的紧边嵌于所述摆车导轨沉槽中；所述摆车导轨沉槽包括光滑过渡的沉槽水平段和沉槽倾斜段，且沉槽倾斜段沿板链紧边的前进方向向下倾斜，所述板链的紧边贴靠在摆车导轨沉槽的底部向下倾斜前进，所述板链主动轮位于沉槽倾斜段的出口，且板链主动轮的节圆与所述沉槽倾斜段的底壁相切。
  19. 根据权利要求18所述的螺旋塔输送机，其特征在于：所述摆车导轨沉槽的底部前后两侧对称设有限位凹槽使述摆车导轨沉槽的横截面呈倒置的T形，所述板链各链节的底部前后两侧对称设有向外侧延伸的板链限位飞边，板链紧边前后两侧的板链限位飞边对称嵌于所述摆车导轨沉槽底部的限位凹槽中；所述板链凸齿与网链的链节端头相啮合时，板链凸齿的顶部高于网链的链销上缘，且板链凸齿的啮合面向前进方向凸起；所述板链的节距小于网链的节距。
  20. 根据权利要求14所述的螺旋塔输送机，其特征在于：所述网链回程段设有位于两转筒之间的网链张紧装置，所述网链张紧装置包括两个定轴张紧轮，两定轴张紧轮之间设有浮动张紧轮，网链张紧段依次绕过右侧的定轴张紧轮、浮动张紧轮及左侧的定轴张紧轮，所述浮动张紧轮的动轴上悬吊有配重块；所述配重块的左右两侧对称设有相互平行的扶正导轨，两扶正导轨设有沿竖向延伸且开口相向的扶正导槽；所述配重块的左右两端分别设有向外延伸的配重扶正杆，两配重扶正杆的外端头分别安装有配重扶正轮，两配重扶正轮分别位于扶正导轨的扶正导槽中；所述浮动张紧轮的动轴两端对称悬吊有牵引弹簧，两牵引弹簧的下端分别铰接在相应的配重扶正杆上；
    所述浮动张紧轮下游的定轴张紧轮为主动轮且固定在张紧轮主动轴上，张紧装置电机的输出端通过单向轴承驱动所述张紧轮主动轴，主动定轴张紧轮产生的牵引力与配重块的重量及网链的悬垂度相适配。
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