CN117228252A - Flexible conveying device, flexible production line and conveying method for air valve - Google Patents

Abstract

The invention discloses a flexible conveying device, a flexible production line and a conveying method for a valve, and belongs to the technical field of valve production. The device comprises a valve exchange structure and an annular return line, wherein the annular return line comprises a serial return line and a parallel return line, a plurality of serial return lines are sequentially arranged from front to back, a plurality of production devices are sequentially arranged beside backward conveying, and no production device can be arranged beside part of serial return lines; the annular return line is an annular conveying structure, a plurality of conveying cups are arranged on the annular return line, and a plurality of positioning structures are arranged in parallel in front of and behind one side of the annular return line which is conveyed backwards; the positioning structure can be used as a feeding station or a discharging station; if one or more production devices with the same working procedures are arranged in parallel around the serial return line, the parallel return line is not arranged around the production device, and a discharging station and a feeding station are arranged in parallel around the production device; if a plurality of production devices with the same working procedures are arranged beside the serial return line in parallel, one side of the serial return line, which is conveyed backwards, is provided with a parallel return line in parallel.

Description

Flexible conveying device, flexible production line and conveying method for air valve

Technical Field

The invention belongs to the technical field of valve production, and particularly relates to a flexible conveying device, a flexible production line and a conveying method of a valve, which can be flexibly adjusted according to production requirements.

Background

The valve is an important automobile part, is an important part of an automobile engine, and is specially used for inputting air into the engine and discharging combusted exhaust gas. The valve consists of a valve rod and a valve head.

The valve is required to be subjected to a plurality of processing procedures and a plurality of detection procedures from a blank to a finished product, and for different valves or customer requirements, the processing procedures or the detection procedures can be changed, for example, ultrasonic flaw detection is not required for the valve, for example, unordered special process processing (such as heat treatment or special coating spraying and the like) is not required; in addition, depending on the order requirements, it may be necessary to increase or decrease the yield, for example, to increase the yield, and then to increase the equipment in a process (the production bottlenecks of the different processes are different) with a slower processing speed. In the prior art, after the production line is designed, the adjustment is inconvenient, the production line may need to be disassembled and assembled again and reinstalled, the requirement on the design capacity of technicians is high, equipment needs to be adjusted, the working strength is very high, and the cost is high.

Disclosure of Invention

In order to solve the problems, the embodiment of the invention provides a flexible conveying device, a flexible production line and a conveying method of an air valve, and production procedures can be adjusted and production equipment can be increased or decreased without disassembling the production line, so that the production line is designed by technicians. The technical scheme is as follows:

the embodiment of the invention provides a flexible conveying device for a valve, which comprises a plurality of valve exchange structures 3 and a plurality of annular return lines 1, wherein the annular return lines 1 comprise serial return lines and parallel return lines, the plurality of serial return lines are sequentially arranged from front to back, a plurality of production devices are sequentially arranged at one side of the back conveying according to the production procedure of the valve 5, and no production device can be arranged beside part of serial return lines; the annular return line 1 is an annular conveying structure, a plurality of conveying cups 2 capable of supporting air valves 5 are arranged on the annular return line, and a plurality of positioning structures 4 are arranged in parallel in the front-back direction on one side of the annular return line which is conveyed backwards; the number of the positioning structures 4 can be adjusted, the positions of the positioning structures are adjustable, the positioning structures can prevent the conveying cups 2 from being conveyed backwards, and the valve exchange structures 3 are matched and arranged at the positioning structures and can serve as a feeding station or a discharging station; the front end and the rear end of the annular return line 1 are respectively provided with a feeding station and a discharging station, and a valve exchange structure 3 is arranged between two adjacent serial return lines; if one or more production devices with the same working procedures are arranged beside the serial return line in parallel, the parallel return line is not arranged beside the serial return line, and a discharging station and a feeding station are arranged beside the production device in parallel; at this time, the valve 5 is output to production equipment through a serial return line, and returns to the current serial return line after processing is completed; at the production facility, the discharge station only outputs empty conveying cups 2 backwards; if a plurality of production devices with the same working procedures are arranged beside the serial return line in parallel, a parallel return line is arranged on one backward conveying side of the production device in parallel, and a discharging station is arranged at the production device; the parallel return line is provided with a feeding station at the production equipment, and the feeding station extends backwards relative to the serial return line and outputs the valve 5 to the subsequent serial return line through a discharging station at the rear end; at this time, the valve 5 is output to the production equipment through a serial return line, and is output to a parallel return line after processing is completed, and is output to a subsequent serial return line through the parallel return line; the discharging station on the serial reflux line outputs the empty conveying cup 2 or the conveying cup 2 with the valve 5 backwards according to the requirement, and the feeding station on the parallel reflux line only blocks the empty conveying cup 2; the transfer cup 2 moves in a circular manner in the annular return line 1 by friction, and the valve exchange structure 3 is used for transferring the valve 5 between the annular return line 1 and the production equipment or between the annular return lines 1 and can take out and put in the transfer cup 2 and move along a preset track.

The parallel return line in the embodiment of the invention is positioned between the corresponding serial return line and production equipment; the annular return line 1 is a runway type conveying structure and comprises an inner annular line and an outer annular line which synchronously move, and a gap between the inner annular line and the outer annular line forms an annular track for the conveying cup 2 to move; the conveying cup 2 comprises a vertically arranged valve supporting sleeve 21 and a friction disc 20 coaxially arranged in the middle of the valve supporting sleeve, the valve supporting sleeve 21 is positioned in an annular track, two sides of the friction disc 20 are respectively hung on an inner annular line and an outer annular line, the valve 5 is inserted into the valve supporting sleeve 21, and the valve disc is hung on the top of the valve supporting sleeve 21; the positioning structure 4 comprises a shifting fork 45 capable of rotating backwards, a valve sensor 17 used for detecting a valve 5, a position sensor used for detecting a conveying cup 2 and a driving mechanism used for driving the shifting fork 45 to rotate backwards, wherein the position sensor is used for detecting whether the conveying cup 2 exists at the positioning structure 4, the valve sensor 17 is positioned above the adjacent part of the valve supporting sleeve 21 and used for detecting whether the valve 5 exists in the current conveying cup 2 at the positioning structure 4, and the shifting fork 45 can block the friction disc 20 from moving backwards; when the fork 45 rotates backward, only the front conveying cup 2 moves backward; the valve exchanging structure 3 is provided with a valve suction head 32 which can move vertically and horizontally.

The conveying cups 2 in the embodiment of the invention are arranged on the annular return line 1 at intervals, part of the conveying cups 2 are close together, and a plurality of conveying cups 2 at the curve section of the annular return line 1 and the positioning structure 4 are close together; the valve supporting sleeve 21 is of a ladder pipe structure with a large pipe section and a small pipe section from top to bottom, and is a plastic pipe; the friction disc 20 is fixed on the step surface of the valve support sleeve 21 and is a metal disc; the inner diameter of the valve supporting sleeve 21 is larger than the diameter of the valve rod, and the inner diameter of the large pipe section is smaller than the diameter of the valve disc.

The annular return line 1 in the embodiment of the invention comprises a frame 10, four conveying belts 12 arranged on the frame 10 in a side-by-side manner, two arc-shaped guide structures at the front end and the rear end of the frame 10, and a middle limiting plate 13 arranged on the frame 10 and positioned above the friction disc 20 adjacently, wherein the annular track comprises two straight line sections arranged in a side-by-side manner and curve sections at the front end and the rear end of the straight line sections; the curve section is positioned between the corresponding ends of the two straight line sections and is matched with the straight line sections; the conveyer belt 12 forms a straight line segment, the arc-shaped guide structure forms a curve segment and is provided with an arc-shaped channel matched with the conveyer belt 12; the two conveyor belts 12 on the same side are synchronously driven and the movement direction of the two conveyor belts 12 on the other side is opposite to that of the two conveyor belts 12 on the other side; the positioning structure 4 is arranged on the straight line section; the middle limiting plate 13 is positioned between two arc-shaped guide structures and positioned between two rows of conveying cups 2 on the annular return line 1, the left side and the right side of the middle limiting plate are respectively positioned on the adjacent inner sides of the valve supporting sleeves 21 on the corresponding sides, the middle limiting plate is positioned right above the two conveying belts 12 in the middle, the front end and the rear end of the middle limiting plate are arc-shaped matched with the curve sections, and a conveying cup replacing opening 15 which can be used for placing the conveying cups 2 is arranged on the left side or the right side of the middle limiting plate and is not positioned at the positioning structure 4; the two sides of the friction disk 20 are hung on the two conveyor belts 12 on the same side or on an arc-shaped guide structure; at the arcuate guide structure, a plurality of conveying cups 2 are brought close together for conveyance.

Further, the annular return line 1 in the embodiment of the invention further comprises three supporting beams 111 which are arranged side by side left and right, four driven wheels 11 which are arranged side by side at the end part of the frame 10, a tensioning and power structure 6 in the middle of the frame 10, and a collecting tray 113 which is arranged on the frame 10 and is positioned below the air valve 5, wherein the collecting tray 113 can receive liquid which drops from the air valve 5, the supporting beams 111 are arranged on the frame 10 along the front and back directions and are arranged on the frame 10 through supporting rods 110, the middle limiting plate 13 is arranged on one supporting beam 111 in the middle, the positioning structure 4 is arranged on the supporting beam 111 at the side, two conveying belts 12 at the two sides are respectively positioned at the upper sides of the two supporting beams 111 at the two sides, and the two conveying belts 12 in the middle are arranged at the upper side of one supporting beam 111 in the middle side by side; the arc guiding structure comprises an inner arc block 112 and an outer arc block 16 at the outer side of the inner arc block, wherein the inner arc block 112 and the outer arc block 16 are arranged on the frame 10 through a supporting rod 110, the upper sides of the inner arc block 112 and the outer arc block 16 are level with the upper side of the conveying belt 12, and an arc notch is arranged at the inner side of the outer arc block 16; the outer side of the inner arc block 112 is in a circular arc shape matched with the circular arc gap, the inner arc block is positioned in the circular arc gap, and a gap between the inner arc block and the outer arc block 16 forms a curve section; the four driven wheels 11 are arranged in an isosceles trapezoid, two driven wheels 11 at two ends are bottom edges, and two driven wheels 11 in the middle are top edges; the inner arc block 112 is positioned on the adjacent outer sides of the two driven wheels 11 in the middle, and the left side and the right side of the inner arc block are respectively flush with the outer sides of the two conveying belts 12 in the middle; the outer arc block 16 is positioned between the two driven wheels 11 at the two ends; two ends of the arc notch are respectively positioned on adjacent inner sides of the two conveying belts 12 at two ends; the tensioning and power structure 6 comprises a rotating frame 60, a pull rod 64, two driving wheels 63, two driving motors 62 and two transition wheels 61, wherein the two transition wheels 61 are arranged in the middle of the frame 10 in a front-back side-by-side manner and below a supporting beam 111, the two driving wheels 63 are arranged on the rotating frame 60 in a left-right side-by-side manner and below the position between the two transition wheels 61, and the two driving motors 62 respectively drive the two driving wheels 63 to reversely rotate; the front end or the rear end of the rotating frame 60 is rotatably arranged on the frame 10, and a pull rod 64 with adjustable length is hinged between the other end of the rotating frame and the frame 10; the front ends of the four conveying belts 12 are respectively wound on four driven wheels 11 at the front end of the frame 10, the rear ends of the four conveying belts are respectively wound on four driven wheels 11 at the rear end of the frame 10, and the middle of the four conveying belts is wound on the tensioning and power structure 6; the four conveyor belts 12 bypass the upper side of one transition wheel 61, downward and two by two, respectively bypass the lower sides of two driving wheels 63, and upward and bypass the upper side of the other transition wheel 61; the left two conveyor belts 12 bypass the left capstan 63 and the right two conveyor belts 12 bypass the right capstan 63.

The driving mechanism in the embodiment of the invention comprises a mounting plate 40, a rotating shaft seat 43, a rotating shaft 44 penetrating through the rotating shaft seat 43 along the vertical direction, an air cylinder 41 arranged along the front-back direction and a hinge block 42 hinged on a telescopic rod of the air cylinder 41; the positioning structure 4 further comprises an upper limit plate 46 on the upper side of the shifting fork 45 and a side limit plate 14 arranged along the front-back direction; the mounting plate 40 and the rotating shaft seat 43 are arranged side by side in front and back and are all arranged on the outer sides of the side supporting beams 111, the cylinder body of the air cylinder 41 is hinged on the mounting plate 40, and the other end of the hinge block 42 is fixedly connected with the lower end of the rotating shaft 44; the shifting fork 45 is horizontally arranged and comprises a stop lever arranged along the left-right direction and a sector stop block at the front side of the outer end of the stop lever; the stop lever is flush with the friction disk 20 and is positioned above the adjacent part of the conveyor belt 12, the outer end of the stop lever is fixed at the upper end of the rotating shaft 44, the inner end of the stop lever is opposite to the friction disk 20, and the front side of the stop lever is provided with a V-shaped groove matched with the friction disk 20; the front side of the fan-shaped stop block is in a circular arc shape and is positioned on the adjacent outer side of the friction disc 20; extension of the cylinder 41 drives the bar to rotate backwards; when the stop lever rotates backwards, the current conveying cup 2 at the front side of the stop lever outputs backwards, and the sector stop block rotates inwards to the rear side of the previous conveying cup 2 so as to stop the previous conveying cup 2 from outputting backwards; the upper limiting plate 46 is positioned above the friction disk 20 adjacently, is positioned at the outer side of the valve supporting sleeve 21, extends inwards relative to the fan-shaped stop block at the inner side, and has a circular arc shape with the front side matched with the front side of the fan-shaped stop block at the front side; the limit plate 14 is fixed to a side support beam 111, which is located adjacent above the friction plate 20, adjacent outside the valve support sleeve 21, and adjacent front of the fork 45.

Specifically, the edge limiting plate 14 in the embodiment of the present invention is an L-shaped plate, the vertical arm of which is vertically disposed and fixed on the supporting beam 111 on the side, and the horizontal arm of which is vertically disposed inside the upper end of the vertical arm and which is located above the friction plate 20 adjacently; the position sensor comprises a first position sensor 18 and a second position sensor 19, the first position sensor 18 is arranged on a vertical arm of the limit plate 14, is positioned at the position of the previous conveying cup 2 and is used for detecting whether the positioning structure 4 has the air valve 5; the second position sensor 19 is located in front of the first position sensor 18 and is provided on the vertical arm or frame 10 of the edge limiter plate 14, and a plurality of conveying cups 2 are provided between the conveying cups and the first position sensor 18 and are used for detecting whether the number of valves 5 which are located immediately in front of the positioning structure 4 exceeds a predetermined number.

More specifically, the length of the annular return line 1 in the embodiment of the invention is 4-10m, the diameter of the friction disc 20 is 40-100mm, the inner diameter of the top of the valve support sleeve 21 is larger than 15mm, 30-80 conveying cups 2 are arranged on each annular return line 1, and 1-4 production devices are arranged beside each serial return line.

On the other hand, the embodiment of the invention also provides a flexible production line of the air valve, which comprises a plurality of production equipment and the flexible conveying device of the air valve, wherein the production equipment comprises equipment for processing or detecting the air valve 5; the production equipment is arranged along the flexible conveying device of the valve according to the production procedure, and the production equipment is not arranged beside the serial return line.

In yet another aspect, an embodiment of the present invention further provides a conveying method, where the method includes:

the conveying cup 2 moves circularly on the annular return line 1, the valve 5 is hung on the conveying cup 2, and the valve exchange structure 3 realizes the transfer of the valve 5 between the annular return line 1 and production equipment or between the annular return lines 1; the position sensor is used for detecting whether the conveying cup 2 is arranged at the positioning structure 4, and the valve sensor 17 is used for detecting whether the valve 5 is arranged in the conveying cup 2 at the positioning structure 4.

If one or more production devices with the same working procedures are arranged beside the serial return line in parallel, the parallel return line is not arranged beside the serial return line; at this time, the liquid crystal display device,

the discharging station at the rear end of the serial return line blocks the conveying cups 2 with the valves 5 and only allows the empty conveying cups 2 to be output backwards; at each production facility, the valves 5 are taken out of the serial return line by the respective valve exchange structure 3 and sent to the production facility, after the processing is completed, the valves 5 are sent back to the serial return line by the respective valve exchange structure 3, and the discharge station will detect that the conveying cups 2 with the valves 5 are all blocked and only allow the empty conveying cups 2 to be output backwards.

If a plurality of production devices with the same working procedures are arranged beside the serial return line in parallel, a parallel return line is arranged beside the serial return line; at this time, the liquid crystal display device,

The discharging station at the rear end of the serial return line does not work; the discharging station at the rear end of the parallel return line blocks the conveying cups 2 with the valves 5 and only allows the empty conveying cups 2 to be output backwards; at each production facility, the valve 5 is taken out from the serial reflux line by the corresponding valve exchange structure 3 and sent to the production facility, after the processing is finished, the valve 5 is sent to the parallel reflux line by the corresponding valve exchange structure 3, the last discharging station on the serial reflux line is blocked for the conveying cup 2 with the valve 5, and other discharging stations are blocked for the conveying cup 2 with the valve 5.

If the production equipment beside the serial return line does not work or does not work, the parallel return line does not work or does not work, and only the feeding station and the discharging station at the front end and the rear end of the serial return line work.

The technical scheme provided by the embodiment of the invention has the beneficial effects that: the embodiment of the invention provides a flexible conveying device, a flexible production line and a conveying method for a valve, which can realize adjustment of production procedures and increase and decrease of production equipment without disassembling the production line, and are beneficial to technical personnel to design the production line. In this patent, drive the valve motion through carrying the cup, adaptable multiple specification's valve, and be convenient for control valve pass through or not pass through location structure according to the production needs. In this patent, constitute different conveying unit through an annular return line or two annular return lines, can realize the serial transport and the parallel transport of valve, can adopt parallel transport and easily increase and decrease production facility to a plurality of production facilities of same process. In this patent, to the adjustment of production process or detection process, then can increase corresponding equipment by the conveying unit can (cooperation simultaneously adjusts location structure and increases the valve exchange structure) or let corresponding location structure not work can, need not to set up special conveyer belt.

Drawings

FIG. 1 is a functional block diagram of a flexible delivery device for a valve in an embodiment of the present invention;

FIG. 2 is a schematic view of a part of the structure of a flexible conveying device of a valve in an embodiment of the present invention;

FIG. 3 is a schematic structural view of an annular return line;

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

FIG. 5 is a schematic view of the structure of the delivery cup;

FIG. 6 is a schematic view of the structure of the end of the annular return line;

FIG. 7 is a schematic view of the structure of the annular return line at the tensioning and power structure;

FIG. 8 is a side view of FIG. 7;

FIG. 9 is a schematic view of a fork and drive mechanism combination;

fig. 10 is a schematic structural view of a valve switching structure.

In the figure: an annular return line 1, a conveying cup 2, a valve exchange structure 3, a positioning structure 4, a valve 5 and a tensioning and power structure 6;

the device comprises a frame 10, a driven wheel 11, a conveying belt 12, a middle limiting plate 13, a limit plate 14, a conveying cup replacement opening 15, an outer arc block 16, an air valve sensor 17, a first position sensor 18, a second position sensor 19, a supporting rod 110, a supporting beam 111, an inner arc block 112 and a collecting tray 113;

20 friction discs and 21 valve support sleeves;

30 a horizontal translation structure, 31 a vertical translation structure and 32 a valve suction head;

40 mounting plates, 41 air cylinders, 42 hinging blocks, 43 rotating shaft seats, 44 rotating shafts, 45 shifting forks and 46 upper limiting plates;

60 rotating frames, 61 transition wheels, 62 driving motors, 63 driving wheels and 64 pull rods.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.

Example 1

Referring to fig. 1-10, embodiment 1 provides a flexible delivery device for a valve comprising a plurality of valve exchange structures 3 and a plurality of annular return lines 1. The annular return line 1 comprises a serial return line and a parallel return line, and a single serial return line or a serial return line and a parallel return line form a conveying unit. The serial return lines are sequentially arranged from front to back, a plurality of production devices (positioned on the same side (left side or right side) of the serial return lines) are sequentially arranged in the production process of the backward conveying side pressing valve 5, and part of the serial return lines can be provided with no production devices.

The annular return line 1 is an annular conveying structure, and is provided with a plurality of conveying cups 2 capable of supporting air valves 5, and a plurality of (at least three, the front end is used as a feeding station, and the rear end is used as a discharging station) positioning structures 4 are arranged in front of and behind one side (left side or right side, and the other side is used for conveying forwards) of the rear conveying. The number of the positioning structures 4 can be adjusted so as to facilitate the increase and decrease of working procedures or increase and decrease of equipment, the positions of the positioning structures can be adjusted to match the increase and decrease of working procedures or increase and decrease of equipment, the positioning structures can block the backward conveying of the conveying cups 2, the valve exchange structures 3 are matched and arranged at the positioning structures (the discharging stations and the feeding stations of the two annular return lines 1 needing to be directly transferred by the valves 5 share one valve exchange structure 3), and the positioning structures can be used as feeding stations or discharging stations (namely, can be used as feeding stations and discharging stations and can be adjusted according to requirements).

The front end and the rear end of the annular return line 1 are respectively provided with a feeding station and a discharging station (which are easy to adjust, and when production equipment beside the annular return line 1 does not work, the annular return line 1 is equivalent to a linear conveyer belt), and a valve exchange structure 3 is arranged between two adjacent serial return lines.

If one or more production devices with the same working procedures are arranged beside the serial return line in parallel, the parallel return line is not arranged beside the serial return line, and a discharging station (outputting to the production device) and a feeding station (receiving the air valve output by the production device) are arranged beside the production device in parallel. At this time, the valve 5 is outputted from the serial return line to the production facility, and returns to the current serial return line after the processing is completed. At the production facility, the discharge station only outputs the empty conveying cups 2 backwards, ensuring that all valves 5 are handled on the corresponding production facility, and the feed station blocks the empty conveying cups 2.

If a plurality of production devices with the same working procedures are arranged in parallel around the serial return line, one parallel return line is arranged on one backward conveying side of the serial return line in parallel, and a discharging station (outputting to the production device) is arranged at the production device. The parallel return line is provided with a feed station (a valve receiving the output of the production device) at the production device, which extends backwards relative to the serial return line and outputs the valve 5 to the subsequent serial return line through a discharge station at the rear end. At this time, the valve 5 is output to the production facility from the serial return line, and after the processing is completed, is output to the parallel return line, and is output to the subsequent serial return line from the parallel return line. The discharging station on the serial reflux line outputs the empty conveying cup 2 or the conveying cup 2 with the valve 5 backwards as required (the production equipment at the rear is required to ensure that the valve 5 can be processed), and the feeding station (the production equipment) on the parallel reflux line only blocks the empty conveying cup 2 to ensure that the valve 5 can be put in.

In this patent, if parallel return lines are provided beside the serial return lines, only the same production facility as the same colleague is provided beside the conveying units constituted by the parallel return lines. If no parallel return line is arranged beside the serial return line, only one production device is arranged beside the serial return line in the same working procedure.

Referring to fig. 1, A1 is a first conveying unit, A2 and B1 form a second conveying unit, A3 and B2 form a third conveying unit, A4 is a fourth conveying unit, A1, A2, B1, A3, B2 and A4 are all annular return lines 1, A2, A3 and A4 are serial return lines and are sequentially arranged from front to back, and B1 and B2 are parallel return lines. The production equipment 1 and 2 beside A1 are two production equipment with different working procedures, the production equipment 3 and 4 beside A2 are two production equipment with the same working procedure, and the production equipment 5-6 beside A3 are three production equipment with the same working procedure.

The transfer cup 2 moves in an annular manner in the annular return line 1 by friction, the valve exchange structure 3 serves to transfer the valve 5 between the annular return line 1 and the production plant or between the annular return lines 1 and it can take out and put in the transfer cup 2 the valve 5 and move in a predetermined trajectory.

The parallel return line in the embodiment of the invention is located between the corresponding serial return line and production equipment, so as to reduce the motion stroke of the valve exchange structure 3 and simplify the valve exchange structure 3. The annular return line 1 is a racetrack type conveying structure and comprises an inner annular line and an outer annular line which synchronously move, wherein the inner annular line and the outer annular line are racetrack type and are parallel. The gap between the inner and outer annular lines forms an annular track (racetrack) for movement of the conveyor cups 2. The conveying cup 2 comprises a valve supporting sleeve 21 which is vertically arranged, a friction disk 20 which is coaxially arranged in the middle of the valve supporting sleeve, and the like, the valve supporting sleeve 21 is positioned in the annular track, two sides of the friction disk 20 are respectively hung on an inner annular line and an outer annular line, and the conveying cup 2 is driven to move through the inner annular line and the outer annular line. The valve 5 is inserted in the valve support sleeve 21 and its valve disk is suspended on top of the valve support sleeve 21.

The positioning structure 4 includes a fork 45 capable of rotating backward, a valve sensor 17 for detecting the valve 5, a position sensor (one or more, preferably two) for detecting the conveying cup 2, a driving mechanism for driving the fork 45 to rotate backward, and the like. The position sensor is used for detecting whether the conveying cup 2 exists at the positioning structure 4, the door sensor 17 is positioned above the adjacent position of the valve supporting sleeve 21 and used for detecting whether the valve 5 exists in the current conveying cup 2 at the positioning structure 4, and the shifting fork 45 can block the friction disc 20 from moving backwards. When the fork 45 rotates backward, only the front conveying cup 2 moves backward. Wherein the valve exchanging structure 3 is provided with a valve suction head 32 which can move vertically and horizontally.

Specifically, referring to fig. 10, the valve exchanging structure 3 in the present embodiment includes a lateral translation structure 30 capable of moving forward and backward or leftward and rightward, a vertical translation structure 31 on the lateral translation structure 30 and capable of moving vertically, a valve tip 32 at the bottom of the vertical translation structure 31, and the like, and the valve tip 32 can move to just above the current conveying cup 2, which can adsorb the top of the valve disc. Of course, other configurations of the valve train structure 3 are possible, such as a multi-axis robot having a valve tip 32.

2-3, in the embodiment of the present invention, the conveying cups 2 are arranged on the annular return line 1 at intervals, and part of the conveying cups 2 are close together, and a plurality of conveying cups 2 at the curve section of the annular return line 1 and the positioning structure 4 are close together. The valve support sleeve 21 has a stepped pipe structure with a large upper part and a small lower part, and is a plastic pipe. The large pipe section is larger than the small pipe section. The friction plate 20 is fixed on a stepped surface of the valve supporting sleeve 21, which is a disk, which is a metal disk. In particular, the friction disk 20 is an aluminum alloy disk having good wear resistance and a suitable weight to ensure transport on the conveyor belt 12. The valve support sleeve 21 has an inner diameter greater than the diameter of the valve stem and a large pipe section having an inner diameter smaller than the diameter of the valve disc.

Referring to fig. 1 to 6, an annular return line 1 in the embodiment of the present invention includes a frame 10, four conveying belts 12 (specifically, narrow conveying belts) disposed side by side on the frame 10, two arc-shaped guiding structures at front and rear ends of the frame 10, and a middle limiting plate 13 on the frame 10 and located above and adjacent to a friction disc 20. The frame 10 is disposed in a front-rear direction. The annular track comprises two straight line sections which are arranged side by side and two curve sections at the front end and the rear end of the annular track. The curved section is located between the corresponding ends of the two straight sections, and is matched with the straight sections. The conveyor belt 12 forms a straight line segment, the arc-shaped guiding structure forms a curved line segment and is provided with an arc-shaped channel matched with the two conveyor belts 12 on the same side. The two conveyor belts 12 on the same side (left or right) are driven synchronously and in the opposite direction to the movement of the two conveyor belts 12 on the other side (right or left), the four conveyor belts 12 have a conveying speed almost equal to that of the other conveyor belt 12. The positioning structure 4 is arranged on the straight line segment so as to prevent the conveying cup 2 from being extruded upwards at the curve segment. The middle limiting plate 13 is located between two arc guiding structures, and is located between two rows of conveying cups 2 (left and right are arranged side by side and are respectively located on two straight line segments) on the annular return line 1, the left and right sides of the middle limiting plate are respectively located on the adjacent inner sides of the corresponding side valve supporting sleeves 21, the middle limiting plate is located right above two conveying belts 12 in the middle, the front and rear ends of the middle limiting plate are arc-shaped matched with the curve segments, conveying cup replacing openings 15 (particularly arc-shaped gaps) which can be placed in the conveying cups 2 are formed in the positions of the left side or the right side of the middle limiting plate and are not located on the positioning structure 4, and the middle limiting plate is used for preventing the conveying cups 2 from being extruded upwards (the curve segments and the conveying cups 2 at the positions of the positioning structure 4 are close together, and have the risk of being extruded upwards, and the rear limiting plate is identical). The friction disk 20 is suspended on both sides on the same side of the two conveyor belts 12 or on an arcuate guide structure. At the arcuate guide structure, a plurality of conveying cups 2 are brought close together for conveying (conveying by means of extrusion, the number being controlled).

Further, referring to fig. 1 to 8, the annular return line 1 in the embodiment of the present invention further includes three support beams 111 arranged side by side left and right, four driven wheels 11 arranged side by side at the end of the frame 10, a tensioning and power structure 6 in the middle of the frame 10, and a collecting tray 113 located on the frame 10 and below the air valve 5. The collecting tray 113 is capable of receiving liquid dripping from the air gate 5 (which may be done in water or in oil during the air gate machining), and the collecting tray 113 is in particular a rectangular tray arranged in a front-rear direction. The support beams 111 are disposed in the front-rear direction, and are disposed on the frame 10 through support rods 110 (vertically disposed), which may be specifically an aluminum profile to facilitate adjustment of the positioning structure 4. The middle limiting plate 13 is arranged on one supporting beam 111 in the middle, the positioning structure 4 is arranged on the supporting beam 111 on the side edge (specifically, one side of backward conveying), the two conveying belts 12 on the two sides are respectively arranged on the upper sides of the two supporting beams 111 on the two sides, and the two conveying belts 12 in the middle are arranged on the upper side of one supporting beam 111 in the middle side by side. The arc guide structure comprises an inner arc block 112 and an outer arc block 16 at the outer side of the inner arc block, wherein the inner arc block 112 and the outer arc block 16 are arranged on the frame 10 through a supporting rod 110, the upper sides of the inner arc block 112 and the outer arc block 16 are flush with the upper side of the conveying belt 12, and an arc notch is arranged at the inner side of the outer arc block 16. The outer side of the inner arc block 112 is in the shape of a circular arc which mates with the circular arc gap, and is located in the circular arc gap, and the gap between the inner arc block and the outer arc block 16 forms a curve section.

The four driven wheels 11 are arranged in an isosceles trapezoid, two driven wheels 11 at two ends are bottom edges, and two driven wheels 11 in the middle are top edges. The inner arc block 112 is located adjacent to the outer sides of the two driven wheels 11 in the middle, and the left and right sides of the inner arc block are respectively flush with the outer sides of the two conveying belts 12 in the middle. The outer arc piece 16 is located between the two driven wheels 11 at both ends. The two ends of the arc notch are respectively positioned on the adjacent inner sides of the two conveyor belts 12 at the two ends.

Wherein the tensioning and power structure 6 is used to power the conveyor belt 12 and tension the conveyor belt 12. The tensioning and power structure 6 comprises a rotating frame 60, a pull rod 64, two driving wheels 63, two driving motors 62, two transition wheels 61 and the like, wherein the two transition wheels 61 are arranged in the middle of the frame 10 in a front-back side-by-side manner, are arranged below a supporting beam 111 and are arranged in a left-right direction, and four ring grooves matched with the conveying belt 12 are arranged on the upper side, the lower side, the left side and the right side of the tensioning and power structure. Two driving wheels 63 are arranged side by side on the rotating frame 60, which are all positioned below the space between the two transition wheels 61. The driving wheel 63 is disposed in the left-right direction, and two ring grooves matched with the conveyer belt 12 are disposed on the driving wheel side by side. The two driving motors 62 respectively drive the two driving wheels 63 to rotate reversely. The rotating frame 60 is disposed in a front-rear direction, the front end or the rear end of the rotating frame is rotatably disposed on the frame 10 (through a rotation shaft in a left-right direction), and a pull rod 64 with an adjustable length is hinged between the other end of the rotating frame and the frame 10. By adjusting the length of the pull rod 64, the inclination angle of the rotating frame 60 can be adjusted, and the tension of the driving wheel 63 on the conveyor belt 12 can be further adjusted.

The front ends of the four conveying belts 12 are respectively wound on the four driven wheels 11 at the front end of the frame 10, the rear ends of the four conveying belts are respectively wound on the four driven wheels 11 at the rear end of the frame 10, and the middle part of the lower conveying belt is wound on the tensioning and power structure 6. The lower conveyor belts of the four conveyor belts 12 all bypass the upper side of one transition wheel 61, downward and two by two, respectively, bypass the lower sides of two driving wheels 63, and upward and bypass the upper side of the other transition wheel 61. The left two conveyor belts 12 bypass the left capstan 63 and the right two conveyor belts 12 bypass the right capstan 63.

Referring to fig. 4 and 9, the driving mechanism in the embodiment of the present invention includes a mounting plate 40, a rotating shaft seat 43, a rotating shaft 44 penetrating the rotating shaft seat 43 in a vertical direction (rotatably provided on the rotating shaft seat 43), an air cylinder 41 provided in a front-rear direction, a hinge block 42 hinged on a telescopic rod of the air cylinder 41, and the like. Preferably, the positioning structure 4 further comprises an upper limiting plate 46 on the upper side of the shifting fork 45 and a side limiting plate 14 arranged along the front-rear direction, and the upper limiting plate 46 and the side limiting plate 14 are used for preventing the conveying cup 2 from being extruded upwards. The mounting plate 40 and the rotating shaft seat 43 are arranged side by side from front to back and are all arranged on the outer side of the side supporting beam 111, the cylinder body of the air cylinder 41 is hinged on the mounting plate 40, and the other end of the hinge block 42 is fixedly connected with the lower end of the rotating shaft 44. The fork 45 is horizontally disposed and includes a bar disposed in a left-right direction and a sector stopper at a front side of an outer end thereof. The bars are flush with the friction plate 20, are positioned above and adjacent to the conveyor belt 12, have their outer ends fixed to the upper ends of the rotating shafts 44, have their inner ends facing the friction plate 20 and have V-grooves on their front sides that mate with the friction plate 20. The front side of the segment stop is circular arc shaped and is located adjacent the outer side of the friction disk 20. Extension of the cylinder 41 drives the bar to rotate backwards. When the stop lever rotates backwards, the current conveying cup 2 at the front side of the stop lever outputs backwards, and the fan-shaped stop block rotates inwards to the rear side of the previous conveying cup 2 so as to stop the previous conveying cup 2 from outputting backwards. The upper limit plate 46 is located above and adjacent to the friction disk 20, and is located outside the valve support sleeve 21, with its inner side extending inward relative to the segment stopper, and its front side being circular arc-shaped to mate with the front side of the segment stopper. The side limiting plate 14 is fixed to a side supporting beam 111, which is located adjacent above the friction plate 20, which is located adjacent outside the valve supporting sleeve 21, which is located adjacent front of the fork 45. Specifically, the side limiting plate 14 is an L-shaped plate, the vertical arm of which is vertically disposed and fixed on the side supporting beam 111, and the horizontal arm of which is vertically disposed inside the upper end of the vertical arm and which is located adjacently above the friction plate 20.

Referring to fig. 3 and 4, the position sensor in the present embodiment includes a first position sensor 18 and a second position sensor 19, where the first position sensor 18 is disposed on the vertical arm of the edge stopper 14, and is located at the previous conveying cup 2 (the present conveying cup 2 is not convenient to mount, and the present conveying cup 2 can be judged by detecting the previous conveying cup 2), and is used for detecting whether the conveying cup 2 is present at the positioning structure 4. The second position sensor 19 is located in front of the first position sensor 18 and is provided on the vertical arm or frame 10 of the edge limiting plate 14, and a plurality of (e.g. 3-6) conveying cups 2 are provided between the second position sensor 18 and the vertical arm or frame, and are used for detecting whether the number of valves 5 located immediately in front of the positioning structure 4 exceeds a predetermined number (a certain number is exceeded, friction force increases, backward thrust of the conveying cups 2 is large, and the shifting fork 45 may not block the conveying cups 2). For the part of the positioning structure 4, if the conveying cup 2 is detected at the second position sensor 19, the fork 45 needs to be rotated backward to pay out one conveying cup 2 backward.

For the positioning structure 4 at the front end of the annular return line 1, the edge limiting plate 14 can be arranged to be shorter, and the second position sensor 19 is arranged on the frame 10 and can be arranged on a straight line segment at the other side. For the positioning structure 4 at other positions of the annular return line 1, the edge limiting plate 14 needs to be provided with a longer length (such as a diameter larger than five friction discs 20), and the second position sensor 19 is provided on the edge limiting plate 14.

More specifically, the length of the annular return line 1 in the embodiment of the invention is 4-10m, the diameter of the friction disc 20 is 40-100mm, the inner diameter of the top of the valve support sleeve 21 is larger than 15mm, 30-80 conveying cups 2 are arranged on each annular return line 1, and 1-4 production devices are arranged beside each serial return line.

Example 2

Embodiment 2 provides a flexible production line for a valve, comprising a plurality of production devices including a device for processing or detecting the valve 5, and the flexible conveying device for a valve disclosed in embodiment 1. The plurality of production devices are arranged along the flexible conveying device of the valve according to the production procedure. One or more production facilities of the same process (the number of production facilities of the same process is one) may be provided side by side in the front-rear direction of the conveying unit, or a plurality of production facilities of the same process may be provided side by side in the front-rear direction. No production equipment may be provided beside the serial return line.

Example 3

Embodiment 3 provides a conveying method, using the flexible conveying device for a valve disclosed in embodiment 1, comprising:

the conveying cup 2 moves circularly on the annular return line 1, the valve 5 is hung on the conveying cup 2, and the valve exchange structure 3 realizes the transfer of the valve 5 between the annular return line 1 and production equipment or between the annular return lines 1. The position sensor is used for detecting whether the conveying cup 2 is arranged at the positioning structure 4, and the valve sensor 17 is used for detecting whether the valve 5 is arranged in the conveying cup 2 at the positioning structure 4.

If one or more production devices with the same working procedures are arranged beside the serial return line in parallel, the parallel return line is not arranged beside the serial return line. At this time, the discharge station at the rear end of the serial return line blocks all the conveying cups 2 with the valves 5 and only allows the empty conveying cup 2 to be output backward (to the following serial return line). At each production facility, the valves 5 are removed from the serial return line by the corresponding valve exchange structure 3 and sent to the production facility, after the processing is completed, the valves 5 are sent back to the serial return line by the corresponding valve exchange structure 3. The discharge station at the production facility will detect that both valved 5 delivery cups 2 are blocked and will only allow the empty delivery cups 2 to be fed back, the feed station blocking the empty delivery cups 2.

If a plurality of production devices with the same working procedures are arranged beside the serial return line in parallel, parallel return lines are arranged beside the serial return line. At this time, the discharging station at the rear end of the serial return line is not operated (the feeding station at the front end of the parallel return line is not operated or the valve 5 is exchanged with the production equipment as the feeding station). The discharge station at the rear end of the parallel return line blocks all conveyor cups 2 with valves 5 and only allows the empty conveyor cups 2 to be fed back out (to the following serial return line). At each production facility, the valves 5 are taken from the serial return line by the respective valve exchange structure 3 and sent to the production facility, after the processing is completed, the valves 5 are sent to the parallel return line by the respective valve exchange structure 3. At the production facility, the last discharge station on the serial reflow line blocks the conveying cup 2 with the valve 5 to ensure that all the valves 5 are sent to the production facility, and other discharge stations block the conveying cup 2 with the valve 5 to ensure that each working production facility has the valve 5 for processing. At the production facility, the feed station of the parallel return line blocks the empty conveying cups 2.

If the production equipment beside the serial return line does not work or does not work, the parallel return line does not exist or does not work, and only the feeding station and the discharging station at the front end and the rear end of the serial return line work (the other positioning structures 4 do not block the conveying cup 2).

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (10)

1. The flexible conveying device of the air valve is characterized by comprising a plurality of air valve exchange structures (3) and a plurality of annular return lines (1), wherein the annular return lines (1) comprise serial return lines and parallel return lines, the plurality of serial return lines are sequentially arranged from front to back, a plurality of production devices are sequentially arranged at the production procedure of a side-by-side air valve (5) conveyed backwards, and no production device is arranged beside part of serial return lines; the annular return line (1) is an annular conveying structure, a plurality of conveying cups (2) capable of supporting air valves (5) are arranged on the annular return line, and a plurality of positioning structures (4) are arranged in parallel in front of and behind one side of the annular return line which is conveyed backwards; the number of the positioning structures (4) can be adjusted, the positions of the positioning structures can be adjusted, the positioning structures can prevent the conveying cups (2) from being conveyed backwards, and the valve exchange structures (3) are matched and arranged at the positioning structures and can serve as a feeding station or a discharging station;

The front end and the rear end of the annular return line (1) are respectively provided with a feeding station and a discharging station, and a valve exchange structure (3) is arranged between two adjacent serial return lines;

if one or more production devices with the same working procedures are arranged beside the serial return line in parallel, the parallel return line is not arranged beside the serial return line, and a discharging station and a feeding station are arranged beside the production device in parallel; at the moment, the valve (5) is output to production equipment through a serial return line, and returns to the current serial return line after processing is completed; at the production facility, the discharge station only outputs empty conveying cups (2) backwards;

if a plurality of production devices with the same working procedures are arranged beside the serial return line in parallel, a parallel return line is arranged on one backward conveying side of the production device in parallel, and a discharging station is arranged at the production device; the parallel return line is provided with a feeding station at the production equipment, and the feeding station extends backwards relative to the serial return line and outputs the valve (5) to the subsequent serial return line through a discharging station at the rear end; at the moment, the valve (5) is output to production equipment through a serial return line, is output to a parallel return line after processing is completed, and is output to a subsequent serial return line through the parallel return line; the discharging station on the serial reflux line outputs the empty conveying cup (2) or the conveying cup (2) with the valve (5) backwards according to the requirement, and the feeding station on the parallel reflux line only blocks the empty conveying cup (2);

The conveying cup (2) moves in a circular shape on the circular return line (1) in a friction mode, the valve exchange structure (3) is used for transferring the valve (5) between the circular return line (1) and production equipment or between the circular return lines (1), and the valve exchange structure can take out and put in the conveying cup (2) and move according to a preset track.

2. A flexible conveying device for a valve according to claim 1, wherein,

the parallel return line is positioned between the corresponding serial return line and production equipment;

the annular return line (1) is of a runway type conveying structure and comprises an inner annular line and an outer annular line which synchronously move, and a gap between the inner annular line and the outer annular line forms an annular track for movement of the conveying cup (2);

the conveying cup (2) comprises a vertically arranged valve supporting sleeve (21) and a friction disc (20) coaxially arranged in the middle of the valve supporting sleeve, the valve supporting sleeve (21) is positioned in an annular track, two sides of the friction disc (20) are respectively hung on an inner annular line and an outer annular line, the valve (5) is inserted into the valve supporting sleeve (21), and the valve disc is hung on the top of the valve supporting sleeve (21);

the positioning structure (4) comprises a shifting fork (45) capable of rotating backwards, a valve sensor (17) used for detecting a valve (5), a position sensor used for detecting a conveying cup (2) and a driving mechanism used for driving the shifting fork (45) to rotate backwards, wherein the position sensor is used for detecting whether the conveying cup (2) exists at the positioning structure (4), the valve sensor (17) is positioned above the adjacent part of a valve supporting sleeve (21) and used for detecting whether the valve (5) exists in the current conveying cup (2) at the positioning structure (4), and the shifting fork (45) can block the friction disc (20) from moving backwards; when the shifting fork (45) rotates backwards, only the current conveying cup (2) moves backwards;

The valve exchanging structure (3) is provided with a valve suction head (32) which can move vertically and horizontally.

3. A flexible conveying device for a valve according to claim 2, characterized in that the conveying cups (2) are arranged on the annular return line (1) at intervals, parts of the conveying cups (2) are close together, and a plurality of conveying cups (2) at the curve section of the annular return line (1) and the positioning structure (4) are close together;

the valve support sleeve (21) is of a ladder pipe structure with a large top and a small bottom, and is a plastic pipe, and a large pipe section and a small pipe section are sequentially arranged from top to bottom; the friction disc (20) is fixed on the stepped surface of the valve support sleeve (21) and is a metal disc; the inner diameter of the valve supporting sleeve (21) is larger than the diameter of the valve rod, and the inner diameter of the large pipe section is smaller than the diameter of the valve disc.

4. The flexible conveying device of the valve according to claim 2, wherein the annular return line (1) comprises a frame (10), four conveying belts (12) arranged on the frame (10) side by side left and right, two arc-shaped guide structures at the front end and the rear end of the frame (10) and a middle limiting plate (13) arranged on the frame (10) and positioned above the friction disc (20) adjacently, and the annular track comprises two straight line sections arranged side by side and curve sections at the front end and the rear end of the straight line sections; the curve section is positioned between the corresponding ends of the two straight line sections and is matched with the straight line sections; the conveying belt (12) forms a straight line section, the arc-shaped guide structure forms a curve section, and an arc-shaped channel matched with the conveying belt (12) is arranged on the arc-shaped guide structure; the two conveyor belts (12) on the same side are synchronously driven and the movement direction of the two conveyor belts (12) on the other side is opposite to that of the two conveyor belts; the positioning structure (4) is arranged on the straight line section; the middle limiting plate (13) is positioned between two arc-shaped guide structures and positioned between two rows of conveying cups (2) on the annular return line (1), the left side and the right side of the middle limiting plate are respectively positioned on the adjacent inner sides of the valve supporting sleeves (21) on the corresponding sides, the middle limiting plate is positioned right above the two conveying belts (12) on the middle part, the front end and the rear end of the middle limiting plate are arc-shaped matched with the curve sections, and a conveying cup replacing opening (15) which can be placed in the conveying cup (2) is arranged on the left side or the right side of the middle limiting plate and is not positioned at the positioning structure (4); both sides of the friction disc (20) are hung on two conveyor belts (12) on the same side or on an arc-shaped guide structure; at the arcuate guide structure, a plurality of conveying cups (2) are brought close together for conveying.

5. The flexible conveying device for the air valve according to claim 4, wherein the annular return line (1) further comprises three supporting beams (111) which are arranged side by side left and right, four driven wheels (11) which are arranged side by side at the end part of the frame (10), a tensioning and power structure (6) at the middle part of the frame (10) and a collecting tray (113) which is arranged on the frame (10) and is positioned below the air valve (5), the collecting tray (113) can receive liquid which drops from the air valve (5), the supporting beams (111) are arranged along the front and back direction and are arranged on the frame (10) through supporting rods (110), the middle limiting plate (13) is arranged on one supporting beam (111) at the middle part, the positioning structure (4) is arranged on the supporting beams (111) at the side edges, two conveying belts (12) at the two sides are respectively positioned on the upper sides of the two supporting beams (111) at the two sides, and the two conveying belts (12) at the middle part are arranged side by side on the upper side of one supporting beam (111) at the middle part;

the arc guiding structure comprises an inner arc block (112) and an outer arc block (16) at the outer side of the inner arc block, the inner arc block (112) and the outer arc block (16) are arranged on the frame (10) through a supporting rod (110), the upper sides of the inner arc block and the outer arc block are flush with the upper side of the conveying belt (12), and an arc notch is formed in the inner side of the outer arc block (16); the outer side of the inner arc block (112) is in a circular arc shape matched with the circular arc gap, the inner arc block is positioned in the circular arc gap, and a gap between the inner arc block and the outer arc block (16) forms a curve section;

The four driven wheels (11) are arranged in an isosceles trapezoid, two driven wheels (11) at two ends are bottom edges, and two driven wheels (11) in the middle are top edges; the inner arc block (112) is positioned on the adjacent outer sides of the two driven wheels (11) in the middle, and the left side and the right side of the inner arc block are respectively flush with the outer sides of the two conveying belts (12) in the middle; the outer arc block (16) is positioned between the two driven wheels (11) at the two ends; two ends of the arc notch are respectively positioned on adjacent inner sides of two conveying belts (12) at two ends;

the tensioning and power structure (6) comprises a rotating frame (60), a pull rod (64), two driving wheels (63), two driving motors (62) and two transition wheels (61), wherein the two transition wheels (61) are arranged in the middle of the frame (10) side by side back and forth and below the supporting beam (111), the two driving wheels (63) are arranged on the rotating frame (60) side by side left and right and below the space between the two transition wheels (61), and the two driving motors (62) respectively drive the two driving wheels (63) to rotate reversely; the front end or the rear end of the rotating frame (60) is rotatably arranged on the frame (10), and a pull rod (64) with adjustable length is hinged between the other end of the rotating frame and the frame (10);

the front ends of the four conveying belts (12) are respectively wound on four driven wheels (11) at the front end of the frame (10), the rear ends of the four conveying belts are respectively wound on four driven wheels (11) at the rear end of the frame (10), and the middle parts of the four conveying belts are wound on the tensioning and power structure (6); the four conveying belts (12) bypass the upper side of one transition wheel (61), downward and two by two bypass the lower sides of two driving wheels (63) respectively, and upward and bypass the upper side of the other transition wheel (61); the left two conveyor belts (12) bypass the left driving wheel (63), and the right two conveyor belts (12) bypass the right driving wheel (63).

6. The flexible conveying device for a valve according to claim 5, wherein the driving mechanism comprises a mounting plate (40), a rotating shaft seat (43), a rotating shaft (44) penetrating through the rotating shaft seat (43) in the vertical direction, a cylinder (41) arranged in the front-rear direction, and a hinge block (42) hinged on a telescopic rod of the cylinder (41);

the positioning structure (4) further comprises an upper limit plate (46) at the upper side of the shifting fork (45) and a side limit plate (14) arranged along the front-back direction;

the mounting plate (40) and the rotating shaft seat (43) are arranged in parallel front and back and are arranged on the outer sides of the supporting beams (111) on the side edges, a cylinder body of the cylinder (41) is hinged to the mounting plate (40), and the other end of the hinge block (42) is fixedly connected with the lower end of the rotating shaft (44);

the shifting fork (45) is horizontally arranged and comprises a stop lever arranged along the left and right directions and a sector stop block at the front side of the outer end of the stop lever; the stop lever is flush with the friction disc (20), is positioned above the adjacent part of the conveying belt (12), the outer end of the stop lever is fixed at the upper end of the rotating shaft (44), the inner end of the stop lever is opposite to the friction disc (20), and the front side of the stop lever is provided with a V-shaped groove matched with the friction disc (20); the front side of the sector stop block is in a circular arc shape and is positioned on the adjacent outer side of the friction disc (20); extension of the cylinder (41) drives the stop lever to rotate backwards; when the stop lever rotates backwards, the current conveying cup (2) at the front side of the stop lever outputs backwards, and the sector stop block rotates inwards to the rear side of the previous conveying cup (2) so as to stop the previous conveying cup (2) from outputting backwards;

The upper limiting plate (46) is positioned above the friction disc (20) adjacently, is positioned at the outer side of the valve supporting sleeve (21), extends inwards relative to the fan-shaped stop block at the inner side, and is in a circular arc shape matched with the front side of the fan-shaped stop block at the front side;

the limit plate (14) is fixed on a side support beam (111) and is positioned above the adjacent friction plate (20), outside the adjacent air valve support sleeve (21), and in front of the adjacent shifting fork (45).

7. The flexible conveying device for a valve according to claim 6, wherein the side limiting plate (14) is an L-shaped plate, the vertical arm of which is vertically arranged and fixed on a side supporting beam (111), and the horizontal arm of which is vertically arranged inside the upper end of the vertical arm and is positioned adjacent above the friction plate (20);

the position sensor comprises a first position sensor (18) and a second position sensor (19), wherein the first position sensor (18) is arranged on a vertical arm of the limit plate (14), is positioned at the position of the previous conveying cup (2) and is used for detecting whether a valve (5) exists at the positioning structure (4); the second position sensor (19) is positioned in front of the first position sensor (18), is arranged on a vertical arm or a frame (10) of the limit plate (14), and a plurality of conveying cups (2) are arranged between the second position sensor and the first position sensor (18) and are used for detecting whether the number of valves (5) which are close together in front of the positioning structure (4) exceeds a preset number.

8. A flexible conveying device for a valve according to claim 2, characterized in that the length of the annular return line (1) is 4-10m, the diameter of the friction disc (20) is 40-100mm, the inner diameter of the top of the valve support sleeve (21) is larger than 15mm, 30-80 conveying cups (2) are arranged on each annular return line (1), and 1-4 production devices are arranged beside each serial return line.

9. Flexible production line for valves, comprising a plurality of production devices, including devices for processing or detecting the valves (5); the flexible conveying device for the air valve is characterized by further comprising the flexible conveying device for the air valve, which is any one of claims 1-8, wherein a plurality of production devices are arranged along the flexible conveying device for the air valve according to production procedures, and no production device is arranged beside a serial return line.

10. A delivery method using the flexible delivery device of a valve according to any one of claims 1 to 8, the method comprising:

the conveying cup (2) moves annularly on the annular return line (1), the valve (5) is hung on the conveying cup (2), and the valve exchange structure (3) realizes the transfer of the valve (5) between the annular return line (1) and production equipment or between the annular return lines (1); the position sensor is used for detecting whether the conveying cup (2) is arranged at the positioning structure (4), and the valve sensor (17) is used for detecting whether the conveying cup (2) is provided with the valve (5) or not;

If one or more production devices with the same working procedures are arranged beside the serial return line in parallel, the parallel return line is not arranged beside the serial return line; at this time, the liquid crystal display device,

the discharging station at the rear end of the serial return line blocks the conveying cups (2) with the air valves (5) and only allows the empty conveying cups (2) to be output backwards; at each production device, the valve (5) is taken out of the serial reflux line by the corresponding valve exchange structure (3) and is sent to the production device, after the processing is finished, the valve (5) is sent back to the serial reflux line by the corresponding valve exchange structure (3), and the discharge station blocks the conveying cup (2) with the valve (5) and only allows the empty conveying cup (2) to be output backwards;

if a plurality of production devices with the same working procedures are arranged beside the serial return line in parallel, a parallel return line is arranged beside the serial return line; at this time, the liquid crystal display device,

the discharging station at the rear end of the serial return line does not work; the discharging station at the rear end of the parallel return line blocks the conveying cups (2) with the air valves (5) and only allows the empty conveying cups (2) to be output backwards; at each production equipment, the valve (5) is taken out from the serial reflux line by the corresponding valve exchange structure (3) and is sent to the production equipment, after the processing is finished, the valve (5) is sent to the parallel reflux line by the corresponding valve exchange structure (3), the last discharging station on the serial reflux line is blocked for the conveying cup (2) with the valve (5), and other discharging stations are blocked for the conveying cup (2) with the valve (5);

If the production equipment beside the serial return line does not work or does not work, the parallel return line does not work or does not work, and only the feeding station and the discharging station at the front end and the rear end of the serial return line work.