A bottle preform conveying device for a dairy product filling line

Abstract

The application discloses a bottle blank conveying device for a dairy product filling production line and relates to the technical field of dairy product production.The bottle blank conveying device comprises a base, the bottom of the base is provided with a plurality of supporting legs, an inner blocking ring is arranged on the base, a plurality of magnetic rectangular insertion slots are circumferentially arranged on the upper portion of the inner blocking ring, a deflection limiting mechanism is arranged on the magnetic rectangular insertion slot, a rotary driving mechanism is arranged on the base and located in the inner blocking ring, a deflection displacement mechanism is arranged on the inner blocking ring, a bottom supporting ring is arranged on the base and located outside the inner blocking ring, the bottom supporting ring is rotationally connected with the inner blocking ring, an outer blocking ring is fixedly connected to the outer side of the bottom supporting ring, and a plurality of feeding and discharging assemblies are arranged on the outer blocking ring.The magnetic rectangular insertion slot can place the deflection limiting mechanism, the angle of the installed deflection limiting mechanism can be adjusted through the deflection displacement mechanism, so that the bottle blank conveying device can adapt to the conveying of bottle blanks with different diameters, the inner blocking ring and the deflection limiting mechanism thereon can be driven through the rotary driving mechanism, and the bottle blank can be actuated.

Description

Technical Field

[0001] This invention relates to the field of dairy product manufacturing technology, specifically a preform conveying device for a dairy product filling production line. Background Technology

[0002] In dairy product bottling lines, preform conveying is a crucial step connecting blow molding, filling, and capping processes. Preforms are typically made of PET, characterized by their light weight and thin walls, requiring stable handling during transport to prevent tipping and collisions. The production line needs to systematically convey preforms from the storage area to the blow molding machine and then transport the filled bottles to the next process; therefore, the preform conveying device must possess comprehensive capabilities for loading, conveying, and unloading.

[0003] Currently, common bottle preform conveying devices mainly fall into two categories: chain conveyors and rotary conveyors. Chain conveyors propel preforms forward via chain plates, offering a simple structure. However, they lack effective guidance and limiting during transport, making them prone to skewing and tipping. Rotary conveyors use a rotating disc to move preforms along an arc trajectory, with external retaining rings for limiting movement. While offering smooth operation, they still have the following shortcomings in practical applications: First, the width of the conveying channel is often fixed, requiring replacement of retaining rings or adjustment of guardrails to accommodate preforms of different diameters, complicating changeover operations and impacting production efficiency. Second, the angle and height of the guiding mechanisms at the loading and unloading stations are fixed when preforms enter and leave the turntable, making it impossible to flexibly adjust according to changes in the height of equipment in preceding and following processes. Third, the actuating mechanism on the turntable uses rigid contact to push the preforms, which can easily cause compression deformation or surface scratches to thin-walled preforms during high-speed transport.

[0004] Furthermore, dairy product bottling lines typically need to accommodate various bottle sizes, ranging from small-capacity yogurt bottles to large-capacity milk bottles, with significant differences in preform diameter. Frequent bottle changeovers require conveying devices with rapid adjustment capabilities to minimize downtime. Therefore, there is an urgent need for a conveying device that can quickly adapt to preforms of different diameters, flexibly adjust feeding and unloading postures, and smoothly move the preforms to improve the efficiency and flexibility of preform conveying in dairy product bottling lines. Summary of the Invention

[0005] This invention provides a preform conveying device for a dairy product filling production line, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A preform conveying device for a dairy product filling production line includes a base with several support legs at its bottom. An inner retaining ring is mounted on the base, with its axis vertically aligned. Several equally angled magnetic rectangular slots are arranged circumferentially on the upper part of the inner retaining ring, each equipped with a deflection limiting mechanism. A rotary drive mechanism is mounted on the base within the inner retaining ring, and a deflection positioning mechanism is also mounted on the inner retaining ring. A bottom support ring is mounted on the base outside the inner retaining ring, rotatably connected to the inner retaining ring. An outer retaining ring is fixedly connected to the outer side of the bottom support ring, and several loading / unloading assemblies are mounted on the outer retaining ring. Each loading / unloading assembly includes side... The device includes a side notch, a limiting lever mechanism, a deflection upper and lower groove mechanism, and a height adjustment mechanism. The side notch is located on the side of the outer retaining ring, the limiting lever mechanism is located on the upper part of the outer retaining ring, the deflection upper and lower groove mechanism is located at the bottom of the side of the outer retaining ring, and the height adjustment mechanism is located between the deflection upper and lower groove mechanism and the base. A magnetic rectangular slot is used to install and place the deflection limiting mechanism, a rotary drive mechanism is used to drive the inner retaining ring to rotate, a deflection positioning mechanism is used to adjust the state of the deflection limiting mechanism, the limiting lever mechanism is used to guide the preform on the upper part of the bottom support ring into the deflection upper and lower groove mechanism, and the height adjustment mechanism is used to adjust the feeding and unloading height of the deflection upper and lower groove mechanism.

[0008] As a preferred embodiment of the present invention, the deflection limiting mechanism includes a rectangular magnetic plug, the cross-section of which is the same as the cross-section of the magnetic rectangular slot. The rectangular magnetic plug is rotatably connected to a gear shaft, and the end of the gear shaft away from the rectangular magnetic plug is fixedly connected to a deflection rod. The gear shaft is coaxially fixedly connected to a first gear.

[0009] As a preferred embodiment of the present invention, the rotary drive mechanism includes a first motor fixed on the base, the output shaft of the first motor being fixedly connected to a second gear, and a gear ring being fixedly connected to the inner side of the inner retaining ring, with the second gear and the gear ring meshing.

[0010] As a preferred embodiment of the present invention, the deflection positioning mechanism includes a horizontal plate fixed to the inner side of the inner retaining ring, a second motor fixedly connected to the middle of the upper surface of the horizontal plate, the output shaft of the second motor fixedly connected to the rotating shaft, a third gear fixedly connected to the top of the rotating shaft, the axis of the rotating shaft coinciding with the axis of the inner retaining ring, and the third gear meshing with the first gear.

[0011] As a preferred embodiment of the present invention, the limiting lever mechanism includes a fixed shaft fixed to the upper surface of the outer retaining ring, and a first guide rod mechanism and a second guide rod mechanism are provided on the fixed shaft.

[0012] As a preferred embodiment of the present invention, the first guide rod mechanism includes a rotating sleeve rotatably connected to a fixed shaft. The axis of the rotating sleeve coincides with the axis of the fixed shaft. A guide rod is fixedly connected to the outer side of the rotating sleeve, and a motor base is fixedly connected to the inner side of the rotating sleeve. A third motor is provided on the motor base. The output shaft of the third motor is fixedly connected to a fourth gear, and a fifth gear is fixedly connected to the fixed shaft coaxially. The fourth gear and the fifth gear mesh.

[0013] As a preferred embodiment of the present invention, the second guide rod mechanism and the first guide rod mechanism have the same structure.

[0014] As a preferred embodiment of the present invention, the deflection upper and lower groove mechanism includes a support plate deflection seat fixed to the bottom of the side of the outer retaining ring, the support plate deflection seat is rotatably connected to the deflection plate, and the upper surface of the deflection plate is provided with two symmetrically arranged limiting baffles.

[0015] As a preferred embodiment of the present invention, the height adjustment mechanism includes a first deflection seat fixed to the side of the base, a second deflection seat fixedly connected to the bottom of the deflection plate, and a linear motor rotatably connected between the first deflection seat and the second deflection seat.

[0016] As a preferred embodiment of the present invention, a rubber inflation ring is provided on the outer side of the inner retaining ring, and an electric inflation / deflation pump is provided inside the rubber inflation ring. The electric inflation / deflation pump is used to inflate and deflate the rubber inflation ring, and to control the inflation state of the rubber inflation ring to adjust and adapt to the conveying of preforms of different diameters.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. This invention enables the quick placement and replacement of deflection limiting mechanisms by setting up magnetic rectangular slots. The angle of the installed deflection limiting mechanism can be adjusted by the deflection positioning mechanism to adapt to the conveying of bottle preforms of different diameters. The rotary drive mechanism can drive the inner retaining ring and the deflection limiting mechanism thereon, thereby smoothly moving the bottle preforms along the conveying channel, improving the efficiency and adaptability of bottle preform conveying in the dairy product filling production line.

[0019] 2. A rubber inflation ring is set on the outside of the inner retaining ring. The inflation degree can be adjusted by an electric inflation and deflation pump, and the outer diameter of the rubber inflation ring can be flexibly changed. In conjunction with the deflection limiting mechanism, the preform is flexibly limited from the inside. This can not only adapt to preforms of different diameters, but also avoid preform deformation and surface scratches caused by rigid extrusion.

[0020] 3. The deflection upper and lower groove mechanism is driven by a linear motor of the height adjustment mechanism to rotate the deflection plate around the support plate deflection seat. It can flexibly adjust the height and tilt angle of the feeding and unloading ends to adapt to the height changes of the equipment in the preceding and following processes and achieve a smooth transition of the preform.

[0021] 4. The limit lever mechanism is driven by a motor to rotate the guide rod around a fixed shaft. The opening angle of the guide rod can be adjusted according to the bottle preform diameter and conveying speed, so as to accurately guide the bottle preform into the deflection plate of the deflection upper and lower groove mechanism. The guidance is precise and the operation is flexible.

[0022] 5. The deflection limiting mechanism is fixed to the inner retaining ring by magnetic attraction, making installation and disassembly convenient and quick; the angle of the deflection rod is centrally and uniformly adjusted by the deflection positioning mechanism, eliminating the need for individual adjustments during model changeovers and significantly shortening the model changeover time. Attached Figure Description

[0023] Figure 1 This is a first-view structural schematic diagram of a preform conveying device used in a dairy product filling production line.

[0024] Figure 2 This is a second-view structural schematic diagram of a preform conveying device used in a dairy product filling production line.

[0025] Figure 3 This is a third-view structural diagram of a preform conveying device used in a dairy product filling production line.

[0026] Figure 4 This is a fourth-view structural diagram of a preform conveying device used in a dairy product filling production line.

[0027] Figure 5 for Figure 4 A magnified view of region A in the middle.

[0028] Figure 6 This is a cross-sectional view of the first guide rod mechanism in a preform conveying device used in a dairy product filling production line.

[0029] In the diagram: 1. Base; 2. Support leg; 3. Inner retaining ring; 4. Magnetic rectangular slot; 5. Deflection limiting mechanism; 501. Rectangular magnetic insert; 502. Gear shaft; 503. Deflection rod; 504. First gear; 6. Rotation drive mechanism; 601. First motor; 602. Second gear; 603. Gear ring; 7. Deflection positioning mechanism; 701. Horizontal plate; 702. Second motor; 703. Rotation shaft; 704. Third gear; 8. Bottom support ring; 9. Side notch; 10. Limit lever mechanism; 1001. Fixed shaft; 100 2. First guide rod mechanism; 10021. Rotating sleeve; 10022. Guide rod; 10023. Motor base; 10024. Third motor; 10025. Fourth gear; 10026. Fifth gear; 1003. Second guide rod mechanism; 11. Deflection upper and lower groove mechanism; 1101. Support plate deflection seat; 1102. Deflection plate; 1103. Limiting baffle; 12. Height adjustment mechanism; 1201. First deflection seat; 1202. Second deflection seat; 1203. Linear motor; 13. Rubber air ring; 14. Outer retaining ring. Detailed Implementation

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0032] For examples, please refer to Figures 1-6 A preform conveying device for a dairy product filling production line includes a base 1, with several support legs 2 at the bottom of the base 1. An inner retaining ring 3 is mounted on the base 1, with its axis vertically aligned. Several equally angled magnetic rectangular slots 4 are arranged circumferentially on the upper part of the inner retaining ring 3, each with a deflection limiting mechanism 5. A rotation drive mechanism 6 is mounted on the base 1 within the inner retaining ring 3, and a deflection positioning mechanism 7 is mounted on the inner retaining ring 3. A bottom support ring 8 is mounted on the base 1 outside the inner retaining ring 3, rotatably connected to the inner retaining ring 3. An outer retaining ring 14 is fixedly connected to the outer side of the bottom support ring 8, and the outer retaining ring 14 has several loading and unloading components, each including a side notch 9 and a limiting mechanism 9. The system comprises a position lever mechanism 10, a deflection upper and lower groove mechanism 11, and a height adjustment mechanism 12. A side notch 9 is located on the side of the outer retaining ring 14. The position lever mechanism 10 is located on the upper part of the outer retaining ring 14. The deflection upper and lower groove mechanism 11 is located at the bottom side of the outer retaining ring 14. The height adjustment mechanism 12 is located between the deflection upper and lower groove mechanism 11 and the base 1. A magnetic rectangular slot 4 is used to install and place the deflection limiting mechanism 5. A rotary drive mechanism 6 is used to drive the inner retaining ring 3 to rotate. A deflection positioning mechanism 7 is used to adjust the state of the deflection limiting mechanism 5. The position lever mechanism 10 is used to guide the preform on the upper part of the bottom support ring 8 into the deflection upper and lower groove mechanism 11. The height adjustment mechanism 12 is used to adjust the feeding and unloading height of the deflection upper and lower groove mechanism 11.

[0033] The deflection limiting mechanism 5 includes a rectangular magnetic plug 501. The cross-section of the rectangular magnetic plug 501 is the same as the cross-section of the magnetic rectangular slot 4. The rectangular magnetic plug 501 is rotatably connected to a gear shaft 502. The end of the gear shaft 502 away from the rectangular magnetic plug 501 is fixedly connected to a deflection rod 503. The gear shaft 502 is coaxially fixedly connected to a first gear 504.

[0034] The rotary drive mechanism 6 includes a first motor 601 fixed on the base 1, the output shaft of the first motor 601 is fixedly connected to a second gear 602, and the inner side of the inner retaining ring 3 is fixedly connected to a gear ring 603, with the second gear 602 and the gear ring 603 meshing.

[0035] Specifically, the first motor 601 drives the gear ring 603 to rotate through the second gear 602, thereby causing the inner retaining ring 3 and its deflection limiting mechanism 5 to rotate around the vertical axis.

[0036] The deflection and positioning mechanism 7 includes a horizontal plate 701 fixed to the inner side of the inner retaining ring 3. A second motor 702 is fixedly connected to the middle of the upper surface of the horizontal plate 701. The output shaft of the second motor 702 is fixedly connected to a rotating shaft 703. A third gear 704 is fixedly connected to the top of the rotating shaft 703. The axis of the rotating shaft 703 coincides with the axis of the inner retaining ring 3. The third gear 704 meshes with the first gear 504.

[0037] Specifically, the second motor 702 synchronously drives each of the first gears 504 to rotate via the rotating shaft 703 and the third gear 704, thereby adjusting the deflection angle of the deflection rod 503.

[0038] The limiting lever mechanism 10 includes a fixed shaft 1001 fixed to the upper surface of the outer retaining ring 14, and a first guide rod mechanism 1002 and a second guide rod mechanism 1003 are provided on the fixed shaft 1001.

[0039] The first guide rod mechanism 1002 includes a rotating sleeve 10021 rotatably connected to a fixed shaft 1001. The axis of the rotating sleeve 10021 coincides with the axis of the fixed shaft 1001. A guide rod 10022 is fixedly connected to the outer side of the rotating sleeve 10021, and a motor base 10023 is fixedly connected to the inner side of the rotating sleeve 10021. A third motor 10024 is mounted on the motor base 10023. The output shaft of the third motor 10024 is fixedly connected to a fourth gear 10025, and a fifth gear 10026 is coaxially fixedly connected to the fixed shaft 1001. The fourth gear 10025 and the fifth gear 10026 mesh. The second guide rod mechanism 1003 has the same structure as the first guide rod mechanism 1002.

[0040] Specifically, the third motor 10024 drives the rotating sleeve 10021 and guide rod 10022 to rotate around the fixed shaft 1001 via gear transmission. The structure of the second guide rod mechanism 1003 is the same as that of the first guide rod mechanism 1002, and the two can independently adjust their guide angles.

[0041] The deflection upper and lower groove mechanism 11 includes a support plate deflection seat 1101 fixed to the bottom side of the outer retaining ring 14. The support plate deflection seat 1101 is rotatably connected to the deflection plate 1102. Two symmetrically arranged limiting baffles 1103 are provided on the upper surface edge of the deflection plate 1102. The height adjustment mechanism 12 includes a first deflection seat 1201 fixed to the side of the base 1. The bottom of the deflection plate 1102 is fixedly connected to the second deflection seat 1202. A linear motor 1203 is rotatably connected between the first deflection seat 1201 and the second deflection seat 1202.

[0042] Specifically, when the linear motor 1203 extends or retracts, it drives the deflection plate 1102 to rotate around the support plate deflection seat 1101, adjusting the tilt angle and end height of the deflection plate 1102. Two symmetrically arranged limiting baffles 1103 are provided on both sides of the upper surface of the deflection plate 1102 for lateral limiting when the preform slides.

[0043] The inner retaining ring 3 is provided with a rubber inflation ring 13 on its outer side. An electric inflation pump is provided inside the rubber inflation ring 13. The electric inflation pump is used to inflate and deflate the rubber inflation ring 13 and control the inflation state of the rubber inflation ring 13 to adjust and adapt to the conveying of preforms of different diameters.

[0044] The workflow of this invention is as follows:

[0045] The workflow of the preform conveying device used in the dairy product filling production line can be divided into three stages: changeover and parameter adjustment, feeding and conveying, and unloading and delivery. The actions of the components involved in each stage are detailed below.

[0046] I. Model Change and Parameter Adjustment Stage

[0047] Based on the diameter of the preform to be transported, three sets of parameters are adjusted for the device. The electric inflation / deflation pump inside the rubber inflation ring 13 is activated to inflate or deflate the ring, adjusting its outer diameter to maintain a suitable gap with the inner wall of the preform, thus flexibly limiting the preform from the inside. The second motor 702 of the deflection positioning mechanism 7 is activated, driving the rotating shaft 703 and the third gear 704 to rotate. The third gear 704 synchronously meshes with the first gear 504 of each deflection limiting mechanism 5, driving the deflection rod 503 to deflect uniformly via the gear shaft 502. The extension angle and position of the end of the deflection rod 503 are adjusted to match its contact distance with the outer wall of the preform. Start the height adjustment mechanism 12 of the loading station and unloading station, extend and retract the linear motor 1203, drive the deflection plate 1102 to rotate around the support plate deflection seat 1101, adjust the tilt angle and end height of the deflection plate 1102 so that the loading end matches the height of the front-end material receiving equipment and the unloading end matches the height of the subsequent process equipment.

[0048] II. Feeding and Conveying Stage

[0049] The preform enters the deflection and grooving mechanism 11 of the feeding station from the front-end feeding equipment. The preform slides down along the inclined deflection plate 1102, and the limiting baffles 1103 on both sides limit the preform laterally. The preform slides into the bottom support ring 8 through the side notch 9 and falls into the annular conveying channel between the inner baffle ring 3 and the outer baffle ring 14.

[0050] The first motor 601 of the rotary drive mechanism 6 is activated, driving the inner retaining ring 3 to rotate around the vertical axis through the meshing of the second gear 602 and the gear ring 603. The deflection limiting mechanism 5 revolves synchronously with the inner retaining ring 3. During the revolution, the deflection rod 503 pushes the preform forward along the annular channel between the bottom support ring 8 and the outer retaining ring 14. The inner side of the preform is flexibly limited by the rubber inflatable ring 13, and the outer side is limited by the outer retaining ring 14. The deflection rod 503 provides circumferential pushing force when pushing the preform. The preform is conveyed to the unloading station as the inner retaining ring 3 continues to rotate.

[0051] III. Material feeding and delivery stage

[0052] When the preform is conveyed to the unloading station, the limit lever mechanism 10 is activated. The third motor 10024 of the first guide rod mechanism 1002 drives the rotating sleeve 10021 and the guide rod 10022 to rotate around the fixed shaft 1001 to a preset angle through the meshing of the fourth gear 10025 and the fifth gear 10026. The second guide rod mechanism 1003 operates in the same manner, and the two sets of guide rods form a guide channel. Guided by the guide rod 10022, the preform deviates from the annular conveying channel and enters the deflection upper and lower groove mechanism 11 of the unloading station through the side notch 9. The preform slides out along the deflection plate 1102 and enters the subsequent process equipment, completing one conveying cycle.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A preform conveying device for a dairy product filling production line, comprising a base, characterized in that, The base has several support legs at its bottom and an inner retaining ring on its base. The axis of the inner retaining ring is vertically oriented. The upper part of the inner retaining ring has several magnetic rectangular slots arranged at equal angles. Each magnetic rectangular slot has a deflection limiting mechanism. A rotation drive mechanism is located inside the inner retaining ring on the base. A deflection positioning mechanism is also located on the inner retaining ring. A bottom support ring is located outside the inner retaining ring on the base. The bottom support ring and the inner retaining ring are rotatably connected. An outer retaining ring is fixedly connected to the outer side of the bottom support ring. The outer retaining ring has several loading and unloading assemblies, each including a side notch, a limiting lever mechanism, and a deflection... The upper and lower groove mechanism and the height adjustment mechanism are located as follows: a side notch is located on the side of the outer retaining ring; a limit lever mechanism is located on the upper part of the outer retaining ring; the upper and lower groove mechanism is located on the bottom side of the outer retaining ring; and the height adjustment mechanism is located between the upper and lower groove mechanism and the base. A magnetic rectangular slot is used to install and place the deflection limit mechanism; a rotary drive mechanism is used to drive the inner retaining ring to rotate; a deflection positioning mechanism is used to adjust the state of the deflection limit mechanism; a limit lever mechanism is used to guide the preform on the upper part of the bottom support ring into the upper and lower groove mechanism; and the height adjustment mechanism is used to adjust the feeding and unloading height of the upper and lower groove mechanism.

2. The preform conveying device for a dairy product filling production line according to claim 1, characterized in that, The deflection limiting mechanism includes a rectangular magnetic plug, the cross-section of which is the same as the cross-section of the magnetic rectangular slot. The rectangular magnetic plug is rotatably connected to a gear shaft, and the end of the gear shaft away from the rectangular magnetic plug is fixedly connected to a deflection rod. The gear shaft is coaxially fixedly connected to a first gear.

3. The preform conveying device for a dairy product filling production line according to claim 1, characterized in that, The rotary drive mechanism includes a first motor fixed on the base, the output shaft of the first motor is fixedly connected to a second gear, and a gear ring is fixedly connected to the inner side of the inner retaining ring. The second gear and the gear ring mesh.

4. The preform conveying device for a dairy product filling production line according to claim 2, characterized in that, The deflection and positioning mechanism includes a horizontal plate fixed to the inner side of the inner retaining ring. A second motor is fixedly connected to the middle of the upper surface of the horizontal plate. The output shaft of the second motor is fixedly connected to a rotating shaft. A third gear is fixedly connected to the top of the rotating shaft. The axis of the rotating shaft coincides with the axis of the inner retaining ring. The third gear meshes with the first gear.

5. The preform conveying device for a dairy product filling production line according to claim 1, characterized in that, The limiting lever mechanism includes a fixed shaft fixed to the upper surface of the outer retaining ring, and a first guide rod mechanism and a second guide rod mechanism are provided on the fixed shaft.

6. The preform conveying device for a dairy product filling production line according to claim 5, characterized in that, The first guide rod mechanism includes a rotating sleeve rotatably connected to a fixed shaft. The axis of the rotating sleeve coincides with the axis of the fixed shaft. A guide rod is fixedly connected to the outer side of the rotating sleeve, and a motor base is fixedly connected to the inner side of the rotating sleeve. A third motor is provided on the motor base. A fourth gear is fixedly connected to the output shaft of the third motor. A fifth gear is fixedly connected to the fixed shaft on the same axis. The fourth gear and the fifth gear mesh.

7. The preform conveying device for a dairy product filling production line according to claim 6, characterized in that, The second guide rod mechanism and the first guide rod mechanism have the same structure.

8. The preform conveying device for a dairy product filling production line according to claim 5, characterized in that, The deflection upper and lower groove mechanism includes a support plate deflection seat fixed to the bottom of the side of the outer retaining ring. The support plate deflection seat is rotatably connected to the deflection plate. The upper surface of the deflection plate is provided with two symmetrically arranged limiting baffles.

9. The preform conveying device for a dairy product filling production line according to claim 8, characterized in that, The height adjustment mechanism includes a first deflector fixed to the side of the base, a second deflector fixedly connected to the bottom of the deflector plate, and a linear motor rotatably connected between the first deflector and the second deflector.

10. The preform conveying device for a dairy product filling production line according to claim 1, characterized in that, The inner retaining ring is provided with a rubber inflation ring on its outer side, and an electric inflation / deflation pump is provided inside the rubber inflation ring. The electric inflation / deflation pump is used to inflate and deflate the rubber inflation ring, and to control the inflation state of the rubber inflation ring to adjust and adapt to the conveying of preforms of different diameters.

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