Full-process automatic packaging equipment for dehydrated vegetable processing

Abstract

The invention relates to the technical field of dehydrated vegetable processing, in particular to dehydrated vegetable processing full-flow automatic packaging equipment which comprises two belt conveyors arranged side by side, a resistance heating pipe fuses packaging films, a vacuum pump extracts air between the films through an air extraction hole, the interior of the dehydrated vegetable package is approximately vacuum, and the packaging film is sealed. The width of a square cutting frame formed by a cutting knife is smaller than that of a packaging film, edge tearing is avoided, vacuumizing airflow flows through an inner cavity of the resistance heating pipe, heat is directly taken away, the working temperature of the resistance heating pipe is reduced, damage caused by continuous high temperature is avoided, and the service life of elements is prolonged; the servo motor drives the take-up and pay-off roller to achieve automatic film roll replacement, the lifting air cylinder precisely controls the cutting pressure, manual intervention is reduced, the double-layer film design adapts to accumulation of vegetables with different thicknesses, and the support and the supporting base ensure the running stability of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of dehydrated vegetable processing, in particular to full-process automated packaging equipment for dehydrated vegetable processing. Background Art

[0002] Dehydrated vegetables, due to their light weight and long shelf life, have become an important raw material in food processing, outdoor food, and emergency supplies. As market demand continues to rise, the limitations of traditional dehydrated vegetable packaging technology have become increasingly prominent, mainly in the following aspects: Packaging efficiency bottleneck Currently, most manufacturers still use manual or semi-automatic packaging equipment, and the processing capacity of a single machine usually does not exceed 15 bags / minute. Manual operation is not only labor-intensive (it requires completing multiple processes such as loading, alignment, and packaging), but is also affected by the operator's proficiency. The product qualification rate fluctuates between 85% and 92%. In contrast, modern food production lines require a packaging speed of at least 30 bags / minute. Manual operation has become the main constraint on increasing production capacity.

[0003] Vacuum control defects The traditional vacuuming method uses a single-point exhaust mode. When processing irregularly shaped vegetable particles (such as diced carrots and chopped onions), the ingredients are prone to form a physical barrier inside the bag. Actual measured data show that this packaging method will cause the residual air volume in about 12% of the product bags to exceed 5%, and the local oxygen concentration can reach 3.2%-4.5%, which is significantly higher than the ideal value (<1%). This directly leads to a 30%-40% shortening of the product shelf life, which is more obvious in high temperature and high humidity environments.

[0004] Sealing process defects Existing heat-sealing technology faces two major technical difficulties: First, insufficient temperature control accuracy (±15°C). When processing composite packaging films (such as PET / AL / PE), differences in thermal shrinkage between the various layers can easily lead to microscopic cracks in the seal. Second, uneven pressure application. Conventional cylinder pressurization methods can experience a pressure drop of up to 20% after continuous operation, resulting in a 40%-60% decrease in seal strength. Furthermore, improper blade angle design of mechanical cutters (mostly using a 30° single-edged blade) can cause the packaging film to stretch and deform, resulting in a burr rate of up to 8%.

[0005] Shortcomings of thermal management system Under continuous operation, the surface temperature of traditional resistance heating elements can rise to 180-220°C within four hours, exceeding the material's tolerance limit. Tracking data from a certain brand of packaging machine shows that after eight hours of continuous operation, the failure rate of its heat-sealing mechanism increases threefold, requiring the heating element to be replaced every 200 hours on average, increasing annual maintenance costs by 20,000-30,000 yuan. Existing air-cooling solutions are inefficient, removing only about 30% of the accumulated heat. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a fully automated packaging device for processing dehydrated vegetables, which can effectively solve the problems raised in the background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a fully automated packaging device for processing dehydrated vegetables, comprising two belt conveyors arranged in parallel, a packaging gap being reserved between the two belt conveyors, two layers of packaging films which are parallel to each other and can be automatically operated being arranged above the two belt conveyors, a lifting seat being lifted and slidably installed just above the packaging gap, cutting knives arranged above the two layers of packaging film being vertically fixedly installed at the four side edges of the bottom of the lifting seat, a vacuum pump being installed on the top of the lifting seat, a heat dissipation cavity being provided inside the four cutting knives, the inner side walls of the four cutting knives passing through the corresponding heat dissipation cavity and being embedded with a resistance heating tube, the outer tube wall of the resistance heating tube passing through the inner tube cavity being provided with a plurality of exhaust holes, the inner cavity of the resistance heating tube being connected to the input end of the vacuum pump, and the two opposite outer side walls of the vacuum pump being provided with exhaust holes connected to the output end of the vacuum pump.

[0008] Furthermore, two support seats are vertically fixedly installed at the bottom of the two belt conveyors, the bottoms of the four support seats are at the same height, brackets are fixedly installed on both sides of the two belt conveyors, a carrier plate arranged above the lifting seat is fixedly installed between the two brackets, a lifting cylinder is vertically fixedly installed on the top of the carrier plate, and the output end of the lifting cylinder passes through the carrier plate and is fixedly connected to the top of the vacuum pump.

[0009] Furthermore, a packaging film conveying assembly is provided above the two belt conveyors, and the packaging film conveying assembly includes two fixing seats respectively fixedly mounted on ends away from each other of the two belt conveyors.

[0010] Furthermore, the fixing seat is provided with two threaded holes distributed up and down, and screws are threadedly installed in several of the threaded holes. The packaging film conveying assembly also includes two retracting rollers respectively located at one end away from the two belt conveyors.

[0011] Furthermore, the two ends of the two layers of packaging film are respectively wrapped and fixed on the outer roller walls of the corresponding retractable rollers, and both ends of the four retractable rollers are provided with insertion holes, and the nail heads of several screws are respectively inserted into the corresponding insertion holes.

[0012] Furthermore, two servo motors are detachably mounted on the outer side wall of one of the fixing seats, and the output ends of the two servo motors respectively pass through the corresponding fixing seats and are detachably connected to the corresponding retractable rollers.

[0013] Furthermore, the outer side walls of the four cutting knives are flush with the four outer side walls of the lifting seat, and the width of the square cutting frame formed by the four cutting knives is smaller than the width of the packaging film.

[0014] Furthermore, an exhaust pipe is fixedly connected between the top of the four cutting knives and the input end of the vacuum pump, and the four exhaust pipes are respectively connected to the corresponding heat dissipation chambers.

[0015] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: 1. High-efficiency vacuum packaging: While the resistance heating tube melts the packaging film, the vacuum pump extracts the air between the films through the exhaust holes, making the interior of the dehydrated vegetable packaging almost vacuum, significantly extending the shelf life. Synchronous cutting and heat sealing on all four sides ensures no air leakage. The square cutting frame formed by the cutting knife is smaller than the packaging film to avoid edge tearing.

[0016] 2. Dynamic heat dissipation protection: The vacuum airflow flows through the inner cavity of the resistance heating tube, directly taking away the heat, reducing its operating temperature, avoiding damage due to continuous high temperature, and extending the life of the component. The heat dissipation cavity and the exhaust pipe form an air flow channel to improve the heat dissipation efficiency and are suitable for continuous operation.

[0017] 3. Automation integration: The servo motor drives the retracting and unwinding rollers to realize automatic film roll replacement. The lifting cylinder accurately controls the cutting pressure to reduce manual intervention. The double-layer film design adapts to the accumulation of vegetables of different thicknesses. The bracket and support base ensure the stability of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the installation structure of the retractable roller and the fixed seat of the present invention; Figure 3 This is a schematic diagram of the disassembled structure of the retractable roller and the fixed seat of the present invention; Figure 4 This is a schematic diagram of the installation structure of the lifting seat and vacuum pump of the present invention; Figure 5 This is a schematic diagram of the connection structure between the vacuum pump and the resistance heating tube of the present invention; Figure 6 For the present invention Figure 4 Enlarged structural diagram at point A in the middle.

[0020] The numbers in the figure represent: 1. Belt conveyor; 11. Support base; 12. Bracket; 13. Lifting cylinder; 21. Fixing seat; 22. Threaded hole; 23. Screw; 24. Retractable roller; 25. Socket; 3. Lifting seat; 31. Cutting knife; 4. Vacuum pump; 41. Resistance heating tube; 42. Exhaust hole; 43. Exhaust pipe. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] The present invention will be further described below with reference to the embodiments.

[0023] Example 1: Reference Figure 1-6 Example 1: Full-process automated packaging equipment for dehydrated vegetable processing, comprising two parallel belt conveyors 1, with a packaging gap reserved between the two belt conveyors 1. It is characterized in that two layers of packaging films that are parallel to each other and can be automatically operated are arranged above the two belt conveyors 1, and further comprising: The lifting seat 3 is installed in a lifting and sliding manner just above the packaging gap. The four sides of the bottom of the lifting seat 3 are vertically fixed with cutting knives 31 arranged above the two layers of packaging film; The vacuum pump 4 is installed on the top of the lifting base 3. The four cutting knives 31 are each provided with a heat dissipation cavity. The inner side walls of the four cutting knives 31 pass through the corresponding heat dissipation cavity and are embedded with a resistance heating tube 41. The outer tube wall of the resistance heating tube 41 passes through the inner tube cavity and is provided with a plurality of exhaust holes 42. The inner cavity of the resistance heating tube 41 is connected to the input end of the vacuum pump 4. The two opposite outer side walls of the vacuum pump 4 are provided with exhaust holes connected to the output end of the vacuum pump 4.

[0024] Specific parameters: Belt conveyor 1 width: 500-800mm; Packing gap width: 200-300mm; Cutting knife 31 height: 50-80mm; Resistance heating tube 41 power: 300-500W; Diameter of the air extraction hole 42: 1-2 mm; Vacuum pump 4 pumping rate: 10-20L / min; Example 2: Reference Figure 1 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: two support seats 11 are vertically fixedly installed at the bottom of the two belt conveyors 1, and the bottoms of the four support seats 11 are at the same height. Brackets 12 are fixedly installed on both sides of the two belt conveyors 1, and a carrier plate arranged above the lifting seat 3 is fixedly installed between the two brackets 12. A lifting cylinder 13 is vertically fixedly installed on the top of the carrier plate, and the output end of the lifting cylinder 13 passes through the carrier plate and is fixedly connected to the top of the vacuum pump 4.

[0025] Specific parameters: Support seat 11 height: 800-1000mm Lifting cylinder 13 stroke: 200-300mm Lifting cylinder 13 thrust: 500-800N Carrier board thickness: 20-30mm The remaining structures are the same as those of Example 1.

[0026] Example 3: Reference Figure 1-3 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: a packaging film conveying assembly is provided above the two belt conveyors 1, and the packaging film conveying assembly includes two fixed seats 21 respectively fixedly installed at the ends away from the two belt conveyors 1, and two threaded holes 22 distributed up and down are opened on the fixed seats 21, and screws 23 are threadedly installed in the plurality of threaded holes 22. The packaging film conveying assembly also includes two retracting rollers 24 respectively located at the ends away from the two belt conveyors 1, and the two ends of the two layers of packaging film are respectively wrapped and fixed on the outer roller walls of the corresponding retracting rollers 24. Both ends of the four retracting rollers 24 are provided with insertion holes 25, and the nail heads of the plurality of screws 23 are respectively inserted into the corresponding insertion holes 25. Two servo motors are detachably installed on the outer wall of one of the fixed seats 21, and the output ends of the two servo motors respectively pass through the corresponding fixed seats 21 and are detachably connected to the corresponding retracting rollers 24.

[0027] Specific parameters: Diameter of retracting roller 24: 100-150mm; Packaging film width: 600-900mm; Servo motor power: 200-400W; Servo motor speed: 10-20rpm; Diameter of threaded hole 22: 8-10 mm; The remaining structures are the same as those of Example 2.

[0028] Example 4: Reference Figure 4-6 , which is the fourth embodiment of the present invention. This embodiment differs from the third embodiment in that the outer walls of the four cutting knives 31 are flush with the four outer walls of the lifting base 3, and the width of the square cutting frame formed by the four cutting knives 31 is smaller than the width of the packaging film. An exhaust pipe 43 is fixedly connected between the top of the four cutting knives 31 and the input end of the vacuum pump 4, and the four exhaust pipes 43 are respectively connected to the corresponding heat dissipation chambers.

[0029] Specific parameters: Cutting frame width: 400-600mm; The inner diameter of the exhaust pipe 43 is 10-15 mm; Heat dissipation cavity volume: 50-100cm 3 ; Packaging film thickness: 0.05-0.1mm; The remaining structures are the same as those of Example 3.

[0030] Working process of fully automated packaging equipment for dehydrated vegetable processing 1. Packaging film transportation and positioning The two layers of packaging film are respectively unwound from the retracting rollers 24 at both ends and synchronously transported to the top of the belt conveyor 1 by the servo motor to cover the packaging gap area. The width of the packaging film is larger than the square cutting frame formed by the cutting knife 31 to ensure that the area to be packaged is completely covered.

[0031] 2. Loading and initial positioning of dehydrated vegetables The dehydrated vegetables are transported to the packaging gap by the belt conveyor 1 and fall between the two layers of packaging film. The belt conveyor 1 runs intermittently to ensure that the vegetable stacking position is aligned with the center of the cutting frame at each stop.

[0032] 3. Vacuum packaging and fusing and cutting Lifting seat presses down: the lifting cylinder 13 drives the lifting seat 3 to move downward, driving the four cutting knives 31 to press the edges of the two layers of packaging film.

[0033] Heating and fusing: The resistance heating tube 41 is energized to generate heat, melting the contact part of the packaging film, and at the same time the cutting knife 31 cuts off the excess film material to form a sealing edge.

[0034] Vacuum extraction: The vacuum pump 4 is started to extract air from the packaging area through the exhaust pipe 43 and the heat dissipation cavity inside the cutting knife 31. The air enters through the exhaust hole 42 of the resistance heating tube 41, takes away the heat and is discharged from the exhaust hole, achieving: Quick vacuum: extract air to make the interior of the package close to vacuum state, extending the shelf life of vegetables; Heat dissipation protection: air flow cools the resistance heating tube 41 to prevent it from being damaged due to continuous high temperature.

[0035] 4. Reset and finished product output After the packaging is completed, the lifting seat 3 rises and resets, and the servo motor drives the retracting roller 24 to rewind the excess film material. At the same time, the belt conveyor 1 transports the finished package to the next process, and a new batch of vegetables enters the packaging gap, and the above process is repeated.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A fully automated packaging device for processing dehydrated vegetables, comprising two belt conveyors (1) arranged in parallel, with a packaging gap reserved between the two belt conveyors (1), characterized in that: Two layers of packaging films that are parallel to each other and can operate automatically are commonly provided above the two belt conveyors (1), and further include: A lifting seat (3), the lifting seat (3) is installed in a lifting and sliding manner just above the packaging gap, and a cutting knife (31) arranged above two layers of packaging film is vertically fixedly installed at the four side edges of the bottom of the lifting seat (3); A vacuum pump (4) is installed on the top of the lifting seat (3), and a heat dissipation cavity is opened inside the four cutting knives (31). The inner side walls of the four cutting knives (31) pass through the corresponding heat dissipation cavity and are embedded with a resistance heating tube (41). The outer tube wall of the resistance heating tube (41) passes through the inner tube cavity and is provided with a plurality of exhaust holes (42). The inner cavity of the resistance heating tube (41) is connected to the input end of the vacuum pump (4), and the two opposite outer side walls of the vacuum pump (4) are provided with exhaust holes connected to the output end of the vacuum pump (4).

2. The fully automated packaging equipment for dehydrated vegetable processing according to claim 1 is characterized in that: Two support seats (11) are vertically fixedly installed at the bottom of the two belt conveyors (1), and the bottoms of the four support seats (11) are flush with each other. Brackets (12) are fixedly installed on both sides of the two belt conveyors (1), and a carrier plate arranged above the lifting seat (3) is fixedly installed between the two brackets (12). A lifting cylinder (13) is vertically fixedly installed on the top of the carrier plate, and the output end of the lifting cylinder (13) passes through the carrier plate and is fixedly connected to the top of the vacuum pump (4).

3. The fully automated packaging equipment for dehydrated vegetable processing according to claim 1 is characterized in that: A packaging film conveying assembly is provided above the two belt conveyors (1), and the packaging film conveying assembly comprises two fixing seats (21) respectively fixedly mounted on ends away from each other of the two belt conveyors (1).

4. The fully automated packaging equipment for processing dehydrated vegetables according to claim 3 is characterized in that: The fixing seat (21) is provided with two threaded holes (22) distributed in an upper and lower direction, and screws (23) are threadedly installed in a plurality of the threaded holes (22). The packaging film conveying assembly further includes two retracting rollers (24) respectively located at the ends away from each other of the two belt conveyors (1).

5. The fully automated packaging equipment for processing dehydrated vegetables according to claim 4 is characterized in that: The two ends of the two layers of packaging film are respectively wound and fixed on the outer roller wall of the corresponding retractable roller (24). Both ends of the four retractable rollers (24) are provided with insertion holes (25), and the nail heads of several screws (23) are respectively inserted into the corresponding insertion holes (25).

6. The fully automated packaging equipment for dehydrated vegetable processing according to claim 1, characterized in that: Two servo motors are detachably mounted on the outer side wall of one of the fixing seats (21), and the output ends of the two servo motors respectively penetrate the corresponding fixing seat (21) and are detachably plugged into the corresponding retractable roller (24).

7. The fully automated packaging equipment for dehydrated vegetable processing according to claim 1, characterized in that: The outer side walls of the four cutting knives (31) are flush with the four outer side walls of the lifting seat (3), and the width of the square cutting frame formed by the four cutting knives (31) is smaller than the width of the packaging film.

8. The fully automated packaging equipment for dehydrated vegetable processing according to claim 1, characterized in that: An exhaust pipe (43) is fixedly connected between the top of the four cutting knives (31) and the input end of the vacuum pump (4), and the four exhaust pipes (43) are respectively connected to the corresponding heat dissipation chambers.

Images