CN211100228U

CN211100228U - Linear plastic empty bottle defect inspection machine

Info

Publication number: CN211100228U
Application number: CN201921903387.6U
Authority: CN
Inventors: 刘林杭; 赵岩; 牛丽萍
Original assignee: Guangzhou Dapson Intelligent Equipment Co ltd
Current assignee: Guangzhou Dapson Intelligent Equipment Co ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-07-28
Anticipated expiration: 2029-11-06

Abstract

The utility model provides a orthoscopic plastics empty bottle defect inspection machine belongs to plastics empty bottle and detects technical field for solve the high-efficient convenient realization to the detection achievement of plastics empty bottle. The bottle body detection device comprises a frame, wherein the frame is fixed on the ground, a clamping and conveying mechanism is fixed on the frame and comprises a first conveying frame and a second conveying frame, a first conveying belt is sleeved on the first conveying frame, a second conveying belt is sleeved on the second conveying frame, mounting grooves are formed in the first conveying frame and the second conveying frame, a first conveying motor is fixed to one end of the first conveying frame, and a bottle body detection mechanism is fixed to the frame. This orthoscopic plastics empty bottle defect inspection machine is owing to five independent unitized modules of different detection stations, and the person of facilitating the use carries out unit distributing type overall arrangement according to production technology and workshop overall arrangement and actual production line needs, has reduced installation cost, very convenient changing of production.

Description

Linear plastic empty bottle defect inspection machine

Technical Field

The utility model belongs to the technical field of plastics empty bottle detects, a inspection machine is related to, especially a orthoscopic plastics empty bottle defect inspection machine.

Background

Plastic bottle packaging products are more and more popular with consumers at present, and are widely applied to the beverage industry, the dairy product industry, the condiment industry, the high-end cosmetic industry and the chemical industry. Due to the reasons of production process and the like, the bottle mouth often has the defects of short injection, rough edges, irregular mouth plane and the like; the bottle bottom often has the defects of foreign matters, black spots, mold closing line cracking, sand holes, accumulated materials and the like; the bottle body often has abnormal defects such as black spots, foreign matters, impurities, crystal whitening, tumor marks, bubbles, hard rings, dewing, stains, thin walls, holes and the like.

Conventional testing involves observing the sample by a person at a fixed angle next to the conveyor line. The biggest problem of transparent bottle is exactly that the appearance that the defect was seen to the angle difference is different, and the luminance and the shape of light source all can directly influence the rate of recognition of people's eye, and adopts the integral detection mode of adopting mostly, and the complete equipment of centre gripping unit and horizontal transport unit formula as an organic whole can't accomplish quick modular split and equipment.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a orthoscopic plastics empty bottle defect inspection machine, the technical problem that the device will solve is: how to realize the detection work of the plastic empty bottle efficiently and conveniently.

The purpose of the utility model can be realized by the following technical proposal:

a linear plastic empty bottle defect inspection machine comprises a frame; the frame is fixed subaerial, be fixed with centre gripping conveying mechanism in the frame, centre gripping conveying mechanism includes first carriage and second carriage, the cover is equipped with first conveyer belt on the first carriage, the cover is equipped with the second conveyer belt on the second carriage, the mounting groove has all been seted up on first carriage and the second carriage, one of first carriage is served and is fixed with first conveying motor, one of second carriage is served and is fixed with second conveying motor, be fixed with on first carriage and the second carriage lower extreme face and place the board, still be fixed with body detection mechanism in the frame.

The utility model discloses a theory of operation is: the frame is formed with the steel sheet welding, and the frame can be according to workshop size and equipment position customization, does not add in this embodiment and describes, and first conveyor motor drives first conveyer belt clockwise rotation, and second conveyor motor drives second conveyer belt anticlockwise rotation, places and is used for placing the plastics empty bottle on the board, and two conveyer belts press from both sides the plastics empty bottle tightly, drive the plastics empty bottle to detecting quick-witted internal movement, and body detection mechanism is used for detecting the body of plastics empty bottle.

The clamping and conveying mechanism further comprises two photoelectric switches and two photoelectric switches, the two photoelectric switches are respectively fixed on the first conveying frame and the second conveying frame, and the mounting groove is provided with an inner bottle bottom detection mechanism.

Structure more than adopting, the plastics empty bottle moves photoelectric switch department along with first conveyer belt and second conveyer belt, and photoelectric switch response triggers for interior bottle bottom detection mechanism begins work.

Interior bottle end detection mechanism includes first lift post and first spacing post, and the one end of first lift post is passed through the bearing and is fixed in the frame, and the other end of first lift post is fixed with first carousel, and first spacing post is fixed in the frame, and the slip is provided with first horizontal pole on the first spacing post, and a pot head of first horizontal pole is established on first lift post, and first horizontal pole and first lift post screw-thread fit of each other, and the other end of first horizontal pole is fixed with first probe.

Structure more than adopting, through rotating first lift post, the first probe that drives first horizontal pole front end reciprocates, can reconcile first probe according to the height of different plastics air bottles, makes things convenient for first probe to detect at the bottom of the bottle in the plastics air bottle.

The clamping and adjusting mechanism is arranged on the mounting groove and comprises a second limiting column and a second cross rod, the second limiting column is provided with two, the second limiting column is fixed on the mounting groove through bolts respectively, one end of the second cross rod is fixed on one second limiting column, the other end of the second cross rod is sleeved on the other second limiting column, a second turntable is fixed to the other end of the second cross rod, the second cross rod and the second limiting column are in threaded fit with each other, a lifting seat is fixed to the second cross rod, and a third turntable is fixed to the lower end of the lifting seat.

Structure more than adopting, the end fixing of lift seat is in the frame, and the movable part of lift seat can reciprocate along with the rotation of third carousel, and then drives the second horizontal pole and reciprocate, prevents that the second horizontal pole from blocking the movement track of plastics empty bottle, and the second carousel drives the second horizontal pole and rotates, drives two spacing post removals through the thrust between screw thread and the screw thread, and then adjusts the distance between first carriage and the second carriage, can realize the plastics empty bottle of the not equidimension of centre gripping.

The outer bottle bottom detection mechanism is arranged on the lower end faces of the first conveying frame and the second conveying frame and comprises a detection frame and a third cross rod, the detection frame is fixed on the rack, one end of the third cross rod is fixed on the rack, a second probe is fixed to the other end of the third cross rod, a lens of the second probe and the detection frame are located on the same axis, and the second probe is located under the detection frame.

By adopting the structure, the detection frame is used for determining whether the plastic empty bottle deviates in the moving process, and the second probe is used for detecting the outer bottom of the plastic empty bottle.

The bottle opening thread detection mechanism is further arranged on the first conveying frame and the second conveying frame and comprises a third limiting column, a fourth cross rod and a second lifting column, one end of the third limiting column and one end of the second lifting column are fixed on the frame, a fourth rotary disc is fixed at the other end of the second lifting column, a sleeve of the fourth cross rod is arranged on the second lifting column in a sleeved mode, the fourth cross rod and the second lifting column are in threaded fit with each other, a third probe is fixed at the other end of the fourth cross rod, and the surface of the fourth cross rod is in contact with the third limiting column.

Structure more than adopting, drive the second lift post through the fourth carousel and rotate, because the thrust that screw-thread fit produced drives fourth horizontal pole up-and-down motion, and then adjusts the distance between third probe and the plastics empty bottle, prevents that the third probe from blocking the movement track of plastics empty bottle, and the third probe detects plastics empty bottle bottleneck screw thread.

The bottle body detection mechanism comprises a negative pressure conveying belt, a negative pressure motor, a first light source, a first camera, a second light source and a second camera, the negative pressure conveying belt is fixed on the frame, a third conveying motor and a speed tracking encoder are fixed at one end of the negative pressure conveying belt, a negative pressure suction hole is formed in the surface of the negative pressure conveying belt, the negative pressure motor is fixed on the frame, the negative pressure motor is communicated with the negative pressure suction holes, four first light sources are arranged, the four first light sources are respectively fixed on the frame, the four first light sources are distributed on two sides of the negative pressure conveying belt in a pairwise corresponding manner, the first camera is fixed in the middle of the first light sources, the second light sources are fixed on the frame and positioned on one side of the negative pressure conveying belt, and the second light source is parallel to the negative pressure conveyer belt, the second camera is fixed on the frame and is positioned at the other side of the negative pressure conveyer belt, and the lens of the second camera is opposite to the second light source.

Structure more than adopting, third conveyor motor drives the work of negative pressure conveyer belt, the speed tracking encoder is used for confirming the rate of motion of negative pressure conveyer belt, plastics empty bottle is placed on the negative pressure conveyer belt, the negative pressure is inhaled the hole and is passed through the drive of negative pressure motor, adsorb plastics empty bottle on the negative pressure conveyer belt, place plastics empty bottle and take place to drop in the testing process, first light source cooperation first camera, carry out the degree to plastics empty bottle body and detect, second light source cooperation second camera is used for detecting plastics empty bottle body profile.

And a rejection cylinder is fixed on the negative pressure conveying belt, is positioned at the position of the detection outlet and has an output end opposite to the negative pressure conveying belt.

By adopting the structure, the detected unqualified products are pushed out of the negative pressure conveying belt by the removing cylinder.

Compared with the prior art, the linear plastic empty bottle defect inspection machine has the following advantages:

1. by using five light sources and five cameras for asynchronous shooting, the visual cost is reduced, the space of the detection equipment is compact, the overall cost of the equipment is low, the installation can be better integrated into a workshop for use, and a large position does not need to be reserved.

2. Through mechanized control, not only do not need the manual work to observe, can also improve detection efficiency and quality.

3. Due to the fact that five independent unit modules are arranged at different detection stations, a user can conveniently carry out unit distributed layout according to production process, workshop layout and actual production line requirements, installation cost is reduced, and production replacement is convenient and fast.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic perspective view of the clamping and conveying mechanism of the present invention;

FIG. 3 is a schematic view of the three-dimensional structure of the body detecting mechanism of the present invention;

in the figure: 1. a clamping and conveying mechanism; 2. a first carriage; 3. a first conveyor belt; 4. a second carriage; 5. a second conveyor belt; 6. mounting grooves; 7. a first conveying motor; 8. a second conveying motor; 9. placing the plate; 10. a photoelectric switch; 11. An inner bottle bottom detection mechanism; 12. a first lifting column; 13. a first limit post; 14. a first cross bar; 15. a first probe; 16. A first turntable; 17. a clamping adjustment mechanism; 18. a second limit post; 19. a second cross bar; 20. a second turntable; 21. a lifting seat; 22. a third turntable; 23. an outer bottle bottom detection mechanism; 24. detecting a frame; 25. a third cross bar; 26. a second probe; 27. a bottle mouth thread detection mechanism; 28. a third limiting column; 29. a fourth cross bar; 30. a third probe; 31. a second lifting column; 32. a fourth turntable; 33. a body detection mechanism; 34. a negative pressure conveyer belt; 35. a third conveying motor; 36. a fast tracking encoder; 37. negative pressure hole washing; 38. a negative pressure motor; 39. a first light source; 40. a first camera; 41. a second light source; 42. a second camera; 43. and (5) removing the air cylinder.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-3, the present embodiment provides a linear plastic empty bottle defect inspection machine, which includes a frame; the machine frame is fixed on the ground, the clamping and conveying mechanism 1 is fixed on the machine frame, the clamping and conveying mechanism 1 comprises a first conveying frame 2 and a second conveying frame 4, a first conveying belt 3 is sleeved on the first conveying frame 2, a second conveying belt 5 is sleeved on the second conveying frame 4, mounting grooves 6 are formed in the first conveying frame 2 and the second conveying frame 4 respectively, a first conveying motor 7 is fixed at one end of the first conveying frame 2, a second conveying motor 8 is fixed at one end of the second conveying frame 4, a placing plate 9 is fixed on the lower end faces of the first conveying frame 2 and the second conveying frame 4, a bottle body detection mechanism 33 is fixed on the machine frame, in the embodiment, the machine frame is formed by welding steel plates, the machine frame can be customized according to the size of a workshop and the position of equipment, in the embodiment, the first conveying motor 7 drives the first conveying belt 3 to rotate clockwise, the second conveying motor 8 drives the second conveying belt 5 to rotate anticlockwise, place and be used for placing plastics empty bottle on the board 9, two conveyer belts press from both sides plastics empty bottle tightly, drive plastics empty bottle to detecting quick-witted inside motion, body detection mechanism 33 is used for detecting the body of plastics empty bottle.

The clamping and conveying mechanism 1 further comprises two

photoelectric switches

10 and 10, the two photoelectric switches 10 are respectively fixed on the first conveying frame 2 and the second conveying frame 4, the mounting groove 6 is provided with the inner bottle bottom detection mechanism 11, in the embodiment, plastic empty bottles move to the photoelectric switches 10 along with the first conveying belt 3 and the second conveying belt 5, and the photoelectric switches 10 are triggered in a sensing mode, so that the inner bottle bottom detection mechanism 11 starts to work.

The inner bottle bottom detection mechanism 11 comprises a first lifting column 12 and a first limiting column 13, one end of the first lifting column 12 is fixed on the rack through a bearing, a first rotating disc 16 is fixed at the other end of the first lifting column 12, the first limiting column 13 is fixed on the rack, a first cross rod 14 is arranged on the first limiting column 13 in a sliding mode, one end of the first cross rod 14 is sleeved on the first lifting column 12, the first cross rod 14 is in threaded fit with the first lifting column 12, and a first probe 15 is fixed at the other end of the first cross rod 14.

The mounting groove 6 is provided with a clamping adjusting mechanism 17, the clamping adjusting mechanism 17 comprises two second limiting columns 18 and two second cross rods 19, the two second limiting columns 18 are fixed on the mounting groove 6 through bolts, one end of each second cross rod 19 is fixed on one second limiting column 18, the other end of each second cross rod 19 is sleeved on the other second limiting column 18, the other end of each second cross rod 19 is fixed with a second turntable 20, the second cross rods 19 and the second limiting columns 18 are in threaded fit with each other, a lifting seat 21 is fixed on each second cross rod 19, a third turntable 22 is fixed at the lower end of each lifting seat 21, in the embodiment, the end of each lifting seat 21 is fixed on the frame, the movable part of each lifting seat 21 can move up and down along with the rotation of the third turntable 22, so as to drive the second cross rods 19 to move up and down, and prevent the second cross rods 19 from blocking the movement track of the plastic empty bottles, the second turntable 20 drives the second cross rod 19 to rotate, the two limiting columns 18 are driven to move through the thrust between the threads, the distance between the first conveying frame 2 and the second conveying frame 4 is further adjusted, and plastic empty bottles with different sizes can be clamped.

Outer bottle bottom detection mechanism 23 is arranged on the lower end faces of first conveying frame 2 and second conveying frame 4, outer bottle bottom detection mechanism 23 comprises a detection frame 24 and a third cross rod 25, detection frame 24 is fixed on the rack, one end of third cross rod 25 is fixed on the rack, the other end of third cross rod 25 is fixed with a second probe 26, the lens of second probe 26 and detection frame 24 are in the same axis, and second probe 26 is located under detection frame 24, in the embodiment, detection frame 24 is used for determining whether plastic empty bottle shifts in the moving process, and second probe 26 is used for detecting the outer bottom of plastic empty bottle.

The first conveying frame 2 and the second conveying frame 4 are further provided with a bottle mouth thread detection mechanism 27, the bottle mouth thread detection mechanism 27 comprises a third limit column 28, a fourth cross rod 29 and a second lifting column 31, one end of the third limit column 28 and one end of the second lifting column 31 are both fixed on the machine frame, the other end of the second lifting column 31 is fixed with a fourth rotary table 32, one end of the fourth cross rod 29 is sleeved on the second lifting column 31, the fourth cross rod 29 and the second lifting column 31 are in threaded fit with each other, the other end of the fourth cross rod 29 is fixed with a third probe 30, the surface of the fourth cross rod 29 is in contact with the third limit column 28, in the embodiment, the fourth rotary table 32 drives the second lifting column 31 to rotate, the fourth cross rod 29 is driven to move up and down by thrust generated by threaded fit, further, the distance between the third probe 30 and a plastic empty bottle is adjusted, and the third probe 30 is prevented from blocking the movement track of the plastic empty bottle, the third probe 30 detects the screw thread of the mouth of the plastic empty bottle.

The bottle body detection mechanism 33 comprises a negative pressure conveyer belt 34, a negative pressure motor 38, a first light source 39, a first camera 40, a second light source 41 and a second camera 42, the negative pressure conveyer belt 34 is fixed on the frame, one end of the negative pressure conveyer belt 34 is fixed with a third conveyer motor 35 and a speed tracking encoder 36, a negative pressure suction hole 37 is arranged on the surface of the negative pressure conveyer belt 34, the negative pressure motor 38 is fixed on the frame, the negative pressure motor 38 is communicated with the negative pressure suction hole 37, the first light source 39 is provided with four, the four first light sources 39 are respectively fixed on the frame, the four first light sources 39 are correspondingly distributed on two sides of the negative pressure conveyer belt 34 in pairs, the first camera 40 is fixed on the middle position of the first light source 39, the second light source 41 is fixed on the frame, the second light source 41 is positioned on one side of the negative pressure conveyer belt 34, the second light source 41 is parallel to the negative, the second camera 42 is located on the other side of the negative pressure conveying belt 34, and the lens of the second camera 42 is opposite to the second light source 41, in this embodiment, the third conveying motor 35 drives the negative pressure conveying belt 34 to work, the speed tracking encoder 36 is used for determining the movement speed of the negative pressure conveying belt 34, plastic empty bottles are placed on the negative pressure conveying belt 34, the negative pressure suction holes 37 are driven by the negative pressure motor 38 to adsorb the plastic empty bottles on the negative pressure conveying belt 34, the plastic empty bottles are placed to fall off in the detection process, the first light source 39 cooperates with the first camera 40 to perform 360-degree detection on the plastic empty bottle bodies, and the second light source 41 cooperates with the second camera 42 to detect the outline of the plastic empty bottle bodies.

The negative pressure conveying belt 34 is fixed with a removing cylinder 43, the removing cylinder 43 is located at a detection outlet, the output end of the removing cylinder 43 is opposite to the negative pressure conveying belt 34, and in the embodiment, detected unqualified products are pushed out of the negative pressure conveying belt 34 by the removing cylinder 43.

The utility model discloses a theory of operation: the plastic empty bottle is placed on the placing plate 9, the third rotary table 22 is rotated, the movable part of the lifting seat 21 can move up and down along with the rotation of the third rotary table 22, and then the second cross rod 19 is driven to move up and down, so that the second cross rod 19 is higher than the plastic empty bottle, the motion track of the plastic empty bottle is prevented from being blocked by the second cross rod 19, the second rotary table 20 drives the second cross rod 19 to rotate, two limit posts 18 are driven to move by the thrust between the threads, and further the distance between the first conveying frame 2 and the second conveying frame 4 is adjusted, so that the plastic empty bottle is clamped by the first conveying belt 3 and the second conveying belt 5, the first conveying motor 7 drives the first conveying belt 3 to rotate clockwise, the second conveying motor 8 drives the second conveying belt 5 to rotate anticlockwise, the plastic empty bottle is driven to move towards the inside of the detection machine, the plastic empty bottle moves to the photoelectric switch 10 along with the first conveying belt 3 and the second conveying, the photoelectric switch 10 is triggered by induction, so that the inner bottle bottom detection mechanism 11 starts to work, the first lifting column 12 is rotated to drive the first probe 15 at the front end of the first cross rod 14 to move up and down, so that the first probe 15 is higher than a plastic empty bottle, the first probe 15 is convenient to detect the inner bottle bottom of the plastic empty bottle, when the plastic empty bottle moves to the position above the detection frame 24, the detection frame 24 is used for determining whether the plastic empty bottle deviates in the moving process, the second probe 26 is used for detecting the outer bottom of the plastic empty bottle, the fourth turntable 32 is used for driving the second lifting column 31 to rotate, thrust generated by thread matching drives the fourth cross rod 29 to move up and down, so that the third probe 30 is higher than the plastic empty bottle, the third probe 30 is prevented from blocking the moving track of the plastic empty bottle, the third probe 30 is used for detecting the threads at the mouth of the plastic empty bottle, when the plastic empty bottle moves to one end of the negative pressure conveyer belt 34, the third conveying motor 35 drives the negative pressure conveying belt 34 to work, the speed tracking encoder 36 is used for determining the movement speed of the negative pressure conveying belt 34, plastic empty bottles are placed on the negative pressure conveying belt 34, the negative pressure suction holes 37 are driven by the negative pressure motor 38 to adsorb the plastic empty bottles on the negative pressure conveying belt 34, the plastic empty bottles are placed to fall off in the detection process, the first light source 39 is matched with the first camera 40 to detect the bodies of the plastic empty bottles at 360 degrees, the second light source 41 is matched with the second camera 42 to detect the body contours of the plastic empty bottles, and when detected unqualified products exist, the air cylinder 43 is removed to push the unqualified products out of the negative pressure conveying belt 34.

In summary, by using five light sources, five cameras capture asynchronously; the vision cost is reduced, the check out test set space is compact, the whole cost of equipment is low, installation that can be better is merged into the workshop and is used, needn't reserve very big position, simultaneously through mechanized control, not only do not need the manual work to observe, can also improve detection efficiency and quality, and because five independent unitized modules of different detection station, the person of facilitating the use carries out unit distributing type overall arrangement according to production technology and workshop overall arrangement and actual production line needs, installation cost has been reduced, very convenient changing of production.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. The utility model provides a straight line type plastics empty bottle defect inspection machine, which comprises a frame and is characterized in that, the frame is fixed subaerial, be fixed with centre gripping conveying mechanism (1) in the frame, centre gripping conveying mechanism (1) includes first carriage (2) and second carriage (4), the cover is equipped with first conveyer belt (3) on first carriage (2), the cover is equipped with second conveyer belt (5) on second carriage (4), mounting groove (6) have all been seted up on first carriage (2) and second carriage (4), one of first carriage (2) is served and is fixed with first conveyer motor (7), one of second carriage (4) is served and is fixed with second conveyer motor (8), be fixed with on the terminal surface under first carriage (2) and second carriage (4) and place board (9), still be fixed with body detection mechanism (33) in the frame.

2. The linear plastic empty bottle defect inspection machine according to claim 1, wherein the clamping conveying mechanism (1) further comprises two photoelectric switches (10), the two photoelectric switches (10) are respectively fixed on the first conveying frame (2) and the second conveying frame (4), and the mounting groove (6) is provided with an inner bottle bottom detection mechanism (11).

3. The linear plastic empty bottle defect inspection machine according to claim 2, wherein the inner bottle bottom detection mechanism (11) comprises a first lifting column (12) and a first limit column (13), one end of the first lifting column (12) is rotatably connected to the rack through a bearing, a first turntable (16) is fixed to the other end of the first lifting column (12), the first limit column (13) is fixed to the rack, a first cross rod (14) is slidably arranged on the first limit column (13), one end of the first cross rod (14) is sleeved on the first lifting column (12), the first cross rod (14) is in threaded fit with the first lifting column (12), and a first probe (15) is fixed to the other end of the first cross rod (14).

4. The linear plastic empty bottle defect inspection machine according to claim 1, wherein the mounting groove (6) is provided with two clamping and adjusting mechanisms (17), each clamping and adjusting mechanism (17) comprises a second limiting column (18) and a second cross rod (19), the second limiting columns (18) are fixed on the mounting groove (6) through bolts, one end of each second cross rod (19) is fixed on one second limiting column (18), the other end of each second cross rod (19) is sleeved on the other second limiting column (18), the other end of each second cross rod (19) is fixed with a second turntable (20), the second cross rods (19) are in threaded connection with the second limiting columns (18), the second cross rods (19) are fixed with lifting seats (21), and the lower ends of the lifting seats (21) are fixed with third turntables (22).

5. The linear plastic empty bottle defect inspection machine according to claim 1, wherein outer bottle bottom detection mechanisms (23) are arranged on the lower end faces of the first conveying frame (2) and the second conveying frame (4), each outer bottle bottom detection mechanism (23) comprises a detection frame (24) and a third cross rod (25), the detection frames (24) are fixed on the rack, one end of each third cross rod (25) is fixed on the rack, a second probe (26) is fixed at the other end of each third cross rod (25), a lens of each second probe (26) and the detection frame (24) are concentric, and each second probe (26) is located right below the detection frame (24).

6. The linear plastic empty bottle defect inspection machine as claimed in claim 1, wherein the first conveyor frame (2) and the second conveyor frame (4) are further provided with a bottle mouth thread detection mechanism (27), the bottle mouth thread detection mechanism (27) comprises a third limiting column (28), a fourth cross rod (29) and a second lifting column (31), one ends of the third limiting column (28) and the second lifting column (31) are fixed on the machine frame, the other end of the second lifting column (31) is fixed with a fourth turntable (32), one end of the fourth cross rod (29) is sleeved on the second lifting column (31), the fourth cross rod (29) and the second lifting column (31) are in threaded fit with each other, the other end of the fourth cross rod (29) is fixed with a third probe (30), and the surface of the fourth cross rod (29) is in contact with the third limiting column (28).

7. The linear plastic empty bottle defect inspection machine according to claim 1, wherein the bottle body detection mechanism (33) comprises a negative pressure conveyer belt (34), a negative pressure motor (38), a first light source (39), a first camera (40), a second light source (41) and a second camera (42), the negative pressure conveyer belt (34) is fixed on the frame, a third conveyer motor (35) and a speed tracking encoder (36) are fixed at one end of the negative pressure conveyer belt (34), a negative pressure suction hole (37) is formed in the surface of the negative pressure conveyer belt (34), the negative pressure motor (38) is fixed on the frame, the negative pressure motor (38) is communicated with the negative pressure suction hole (37), four first light sources (39) are arranged, the four first light sources (39) are respectively fixed on the frame, and the four first light sources (39) are correspondingly distributed on two sides of the negative pressure conveyer belt (34) in pairs, the first camera (40) is fixed in the middle of the first light source (39), the second light source (41) is fixed on the rack, the second light source (41) is located on one side of the negative pressure conveying belt (34), the second light source (41) and the negative pressure conveying belt (34) are parallel to each other, the second camera (42) is fixed on the rack, the second camera (42) is located on the other side of the negative pressure conveying belt (34), and a lens of the second camera (42) is opposite to the second light source (41).

8. The linear plastic empty bottle defect inspection machine as claimed in claim 7, characterized in that a removing cylinder (43) is fixed on the negative pressure conveying belt (34), the removing cylinder (43) is located at the position of the detection outlet, and the output end of the removing cylinder (43) is opposite to the negative pressure conveying belt (34).