A rotary modified atmosphere packaging machine

Abstract

The present invention belongs to the field of packaging machines, and specifically is a rotary controlled atmosphere packaging machine, comprising a box body, a support frame fixedly connected to the bottom of the inner wall of the box body, a support ring slidably connected to the top of the support frame, a swivel fixedly connected to the top of the support ring, a plurality of placement grooves equidistantly provided on the top of the swivel, and a motor fixedly connected to the bottom of the inner wall of the box body; the present invention provides a rotary controlled atmosphere packaging machine, which controls a coating roller to move downward to coat a packaging box by a hydraulic cylinder, and when the hydraulic cylinder extends, the mixed gas in the gas collecting box is sprayed out along two nozzles by squeezing a first piston plate, and through the cooperation of two ejector rods and two ejector blocks, as the packaging film moves downward, the two nozzles move away from the packaging box while spraying the gas, and after the two nozzles move away from the packaging box, the packaging film is controlled to continue to move downward to coat the packaging box, thereby shortening the gap between the controlled atmosphere operation and the coating operation, and preventing the mixed gas rushed in after the controlled atmosphere of the packaging box from being lost.

Description

Technical Field

[0001] The invention belongs to the field of packaging machines, in particular to a rotary atmosphere-controlled packaging machine. Background Art

[0002] Modified atmosphere packaging machine is a food packaging machine that uses composite gas replacement fresh-keeping packaging technology. The principle of modified atmosphere packaging is to use a fresh-keeping mixed gas, such as nitrogen and carbon dioxide, to replace the air in the packaging box or packaging bag, change the external environment of the material in the packager, inhibit the growth and reproduction of bacteria and microorganisms, slow down the metabolism of materials, and thus extend the shelf life of materials. Therefore, the fresh-keeping packaging in the food and other fields has gradually developed from vacuum packaging to modified atmosphere packaging, that is, using other fresh-keeping or quality-preserving gases to replace the air in the material packaging. Modified atmosphere packaging has many advantages that traditional vacuum packaging cannot match, and its gas replacement rate is high and its productivity is high.

[0003] When laminating the packaging box, a mixed gas of nitrogen and carbon dioxide needs to be filled into the packaging box. The existing technology is not convenient for simultaneous atmosphere conditioning and laminating. The laminating operation can only be performed after a period of atmosphere conditioning. As a result, the mixed gas of nitrogen and carbon dioxide flushed into the packaging box is easy to leak, and it is not convenient to mix nitrogen and carbon dioxide evenly. After flushing into the packaging box, it is easy to cause the preservation effect of some areas of the packaging box to be poor, resulting in food spoilage. Secondly, it is not convenient to process the original gas in the packaging box, resulting in the mixed gas of nitrogen and carbon dioxide being easily mixed with the original gas in the packaging box, affecting the preservation of food.

[0004] To this end, the present invention provides a rotary modified atmosphere packaging machine. Summary of the invention

[0005] In order to make up for the shortcomings of the prior art and solve the problem that it is inconvenient to carry out atmosphere conditioning and film coating simultaneously, the film coating operation can only be carried out after a period of atmosphere conditioning, which causes the nitrogen and carbon dioxide mixed gas flushed into the packaging box to leak easily, and it is not convenient to mix the nitrogen and carbon dioxide evenly, which easily leads to poor preservation effect in some areas of the packaging box after flushing into the packaging box, and the phenomenon of food spoilage. Secondly, it is inconvenient to process the original gas in the packaging box, which causes the nitrogen and carbon dioxide mixed gas to be easily mixed with the original gas in the packaging box, affecting the preservation of food. The present invention proposes a rotary atmosphere packaging machine.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a rotary modified atmosphere packaging machine described in the present invention comprises a box body, a support frame is fixedly connected to the bottom of the inner wall of the box body, a support ring is slidably connected to the top of the support frame, a swivel is fixedly connected to the top of the support ring, a plurality of placement grooves are equidistantly provided on the top of the swivel, a motor is fixedly connected to the bottom of the inner wall of the box body, a gear is fixedly connected to the output end of the motor, a gear is fixedly connected to the inner wall of the swivel, the gear is meshingly connected to the gear ring, an empty groove is provided on the outer wall of the box body, a film coating assembly is arranged on the top of the inner wall of the box body, an air collecting box is fixedly connected to the bottom of the inner wall of the box body, and an air extraction assembly is arranged on the top of the air collecting box.

[0007] Preferably, the laminating assembly includes a hydraulic cylinder, which is fixedly mounted on the top of the inner wall of the box body, the output end of the hydraulic cylinder is fixedly connected to a slide plate, the bottom of the slide plate is symmetrically fixedly connected to two side plates, and a laminating roller is arranged between the two side plates.

[0008] Preferably, the air extraction assembly includes a first sleeve, the first sleeve is fixedly mounted on the top of the air collecting box, the inner wall of the first sleeve is slidably connected to the first piston plate, the top of the first piston plate is fixedly connected to the first piston rod, one side of the first sleeve is fixedly connected to the second connecting tube, one end of the second connecting tube extends to the interior of the air collecting box, the top of the air collecting box is fixedly connected to the sleeve box, the first connecting tube is fixedly connected between the sleeve box and the first sleeve, the inner walls of the first connecting tube and the second connecting tube are both provided with a first one-way valve, the two first one-way valves are both opened toward the sleeve box, the inner wall of the box body and located below the coating roller are symmetrically fixedly connected to two support plates, the tops of the two support plates are fixedly connected to the limiting plates, and the inner walls of the two limiting plates are slidable A second sliding shaft is dynamically connected, one end of the second sliding shaft is fixedly connected to a top block, the other end of the second sliding shaft is fixedly connected to a nozzle, the outer wall of the second sliding shaft is sleeved with a third spring, one end of the third spring is fixedly connected to a limit plate, the other end of the third spring is fixedly connected to the nozzle, an air outlet is provided at the bottom of the two nozzles, two gas pipelines are symmetrically fixedly connected to the outer wall of the sleeve box, the tops of the two gas pipelines are fixedly connected to a first hose, the two first hoses are respectively fixedly connected to the two nozzles, the bottom of the slide plate is symmetrically fixedly connected to two push rods, the top of the push block is provided with an inclined groove for cooperating with the push rod, the bottom of the push block and the inner wall of the support plate are provided with a through groove for cooperating with the push rod, and the outer wall of the slide plate is provided with a driving unit.

[0009] Preferably, the driving unit includes a connecting frame, which is fixedly mounted on the outer wall of the skateboard, the top of the first piston rod passes through the first sleeve and is fixedly connected to the exhaust pipe, one end of the exhaust pipe extends to the outside of the box, one end of the connecting frame passes through the box and is fixedly connected to the exhaust pipe, and the connecting frame and the exhaust pipe are both slidably connected to the box.

[0010] Preferably, an air intake ring is fixedly connected to the bottom of the second connecting pipe, an air intake groove is opened on the inner wall of the air intake ring, and the air intake groove is arranged in a ring shape. A plurality of air intake ports are opened at equal intervals on the outer wall of the air intake ring, and the air intake ports are communicated with the air intake groove. A plurality of guide plates are fixedly connected to the outer wall of the air intake ring at equal intervals, and the guide plates are attached to the sides of the air intake ports, and the guide plate between the two air intake ports is in an eight-shape.

[0011] Preferably, the inner wall of the sleeve is rotatably connected to a rotating shaft, the bottom of the rotating shaft is fixedly connected to a fan blade, the top of the rotating shaft passes through the sleeve and is fixedly connected to a second pulley, the outer wall of the output end of the motor is fixedly connected to a first pulley, and the first pulley and the second pulley are connected by a transmission belt.

[0012] Preferably, the exhaust pipe is fixedly connected to the top of the inner part of the box body with a second sleeve, the inner wall of the second sleeve is slidably connected to a second piston plate, the top of the second piston plate is fixedly connected to a second piston rod, the top of the second piston rod passes through the second sleeve and is fixedly connected to the support plate, the inner wall of the exhaust pipe is provided with two second one-way valves, the two second one-way valves are symmetrically installed with the second sleeve as the center, the two second one-way valves are both open to the outside of the box body, the top of the exhaust pipe is fixedly connected to a second hose, one end of the second hose is connected to the nozzle located on the left side, the inner wall of the nozzle located on the left side is fixedly connected to a partition, the partition is located between the first hose and the second hose, and an air intake port is provided on one side of the nozzle located on the left side.

[0013] Preferably, the bottom of the two nozzles are fixedly connected with a second guide plate, and the two second guide plates are installed at an angle. One side of the nozzle located on the left is fixedly connected with a first guide plate, and the first guide plate is located above the air intake port and tilted downward.

[0014] Preferably, a mounting plate is fixedly connected between the two side plates, a first sliding shaft is slidably connected to the inner wall of the mounting plate, a limiting block is fixedly connected to the top of the first sliding shaft, a top plate is fixedly connected to the bottom of the first sliding shaft, a second spring is sleeved on the outer wall of the first sliding shaft, a top of the second spring is fixedly connected to the mounting plate, a bottom of the second spring is fixedly connected to the top plate, an annular heater is arranged inside the top plate, and both sides of the top plate are arranged as arc surfaces.

[0015] Preferably, installation grooves are opened on the four surfaces of the inner wall of the placement groove, the inner walls of the four installation grooves are fixedly connected with first springs, one ends of the four first springs are fixedly connected with clamping blocks, the four clamping blocks are respectively slidably connected to the four installation grooves, and one ends of the four clamping blocks are set as inclined surfaces and extend to the interior of the placement groove.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The rotary modified atmosphere packaging machine described in the present invention controls the coating roller to move downward to coat the packaging box through a hydraulic cylinder. When the hydraulic cylinder extends, the mixed gas in the gas collecting box is sprayed out along the two nozzles by squeezing the first piston plate, and through the cooperation of the two ejector rods and the two ejector blocks, as the packaging film moves downward, the two nozzles move away from the packaging box while spraying air. After the two nozzles move away from the packaging box, the packaging film is controlled to continue to move downward to coat the packaging box, thereby shortening the gap between the modified atmosphere operation and the coating operation, and preventing the mixed gas rushed in after the modified atmosphere of the packaging box from being lost.

[0018] 2. In the rotary modified atmosphere packaging machine described in the present invention, while the first sleeve is evacuating air, the mixed gas in the gas collecting box enters the air inlet groove along a plurality of air inlets under the guidance of a plurality of guide plates, and the gas at different levels in the gas collecting box is extracted through the air inlets at different heights, so as to prevent nitrogen and nitrogen dioxide from precipitating in the gas collecting box and affecting the preservation effect of the mixed gas, and the mixed gas passing through the sleeve is stirred by the rotation of the fan blades, so that the nitrogen and carbon dioxide are evenly mixed, thereby improving the preservation effect of the food in the packaging box.

[0019] 3. The rotary modified atmosphere packaging machine described in the present invention, when injecting a mixed gas of nitrogen and carbon dioxide into a packaging box for preservation, the mixed gas flows downward along the inclined surface of the second guide plate, so that the mixed gas impacts the inner wall of the packaging box, thereby facilitating the original gas in the packaging box to be squeezed upward from between the two second guide plates while the packaging box is filled with the mixed gas. When the original gas in the packaging box is squeezed upward, it is sucked away through the suction port to prevent the mixed gas of nitrogen and carbon dioxide from mixing with the original gas in the packaging box. When the first piston plate is pulled out to re-fill the first sleeve with the mixed gas, the original gas in the packaging box sucked into the second sleeve is squeezed out of the box along the exhaust pipe under the squeezing action of the second piston plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a front view of the present invention;

[0022] Figure 2 is a side view of the present invention;

[0023] Figure 3 is a front cross-sectional view of the present invention;

[0024] Figure 4 It is a three-dimensional diagram of the top plate and the laminating roller of the present invention in cooperation with each other;

[0025] Figure 5 It is a stereoscopic diagram of the gear ring and the rotating ring of the present invention in cooperation with each other;

[0026] Figure 6 It is a three-dimensional diagram of the supporting frame and the supporting ring of the present invention in cooperation with each other;

[0027] Figure 7 is a side cross-sectional view of the air intake ring of the present invention;

[0028] Figure 8 The present invention Figure 3 The enlarged view of point A in the middle;

[0029] Fig. 9 The present invention Figure 3 The enlarged view of point B in the middle;

[0030] Fig.10 The present invention Figure 3 Enlarged view of point C in the middle;

[0031] In the figure: 1, box body; 2, support frame; 3, support ring; 4, swivel; 5, empty slot; 6, gear ring; 7, motor; 8, gear; 9, placement slot; 10, first spring; 11, clamping block; 12, side plate; 13, laminating roller; 14, mounting plate; 15, first slide shaft; 16, second spring; 17, limit block; 18, top plate; 19, support plate; 20, top block; 21, inclined slot; 22, through slot; 23, limit plate; 24, second slide shaft; 25, third spring; 26, nozzle; 27, air outlet; 28, air pipeline; 29, first hose; 30, air collecting box; 31, first sleeve; 32, first movable The plug plate; 33, the first piston rod; 34, the exhaust pipe; 35, the connecting frame; 36, the hydraulic cylinder; 37, the slide plate; 38, the push rod; 39, the second sleeve; 40, the second piston rod; 41, the second piston plate; 42, the first connecting pipe; 43, the second connecting pipe; 44, the first non-return valve; 45, the sleeve; 46, the rotating shaft; 47, the fan blade; 48, the first pulley; 49, the second pulley; 50, the transmission belt; 51, the second non-return valve; 52, the second hose; 53, the air intake port; 54, the first guide plate; 55, the second guide plate; 56, the air intake ring; 57, the air intake groove; 58, the air intake port; 59, the guide plate. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0033] like Figures 1 to 10 As shown, the present invention provides a technical solution, a rotary modified atmosphere packaging machine, comprising a box body 1, a support frame 2 is fixedly connected to the bottom of the inner wall of the box body 1, a support ring 3 is slidably connected to the top of the support frame 2, a swivel 4 is fixedly connected to the top of the support ring 3, a plurality of placement grooves 9 are equidistantly provided on the top of the swivel 4, a motor 7 is fixedly connected to the bottom of the inner wall of the box body 1, a gear 8 is fixedly connected to the output end of the motor 7, a gear ring 6 is fixedly connected to the inner wall of the swivel 4, the gear 8 is meshingly connected to the gear ring 6, an empty groove 5 is provided on the outer wall of the box body 1, a film coating assembly is arranged on the top of the inner wall of the box body 1, an air collecting box 30 is fixedly connected to the bottom of the inner wall of the box body 1, and an exhaust assembly is arranged on the top of the air collecting box 30.

[0034] Through the above technical scheme, the motor 7 is started to drive the gear 8 to rotate, the gear ring 6 to rotate, and the rotating ring 4 to rotate. When the placement slot 9 rotates to the position of the empty slot 5, the packaging box is placed in the placement slot 9. As the rotating ring 4 continues to rotate, the packaging box is rotated to the bottom of the coating assembly and coated by the coating assembly, and the gas in the packaging box is adjusted by the exhaust assembly. The packaged packaging box continues to rotate with the rotating ring 4, and when it rotates to the position of the empty slot 5 again, it is taken out and a new packaging box is placed.

[0035] Specifically, the laminating assembly includes a hydraulic cylinder 36 , which is fixedly mounted on the top of the inner wall of the box 1 , and the output end of the hydraulic cylinder 36 is fixedly connected to a slide plate 37 , the bottom of the slide plate 37 is symmetrically fixedly connected to two side plates 12 , and a laminating roller 13 is arranged between the two side plates 12 .

[0036] Through the above technical scheme, the packaging film is transmitted by the laminating roller 13. When the packaging box rotates to the bottom of the laminating assembly, the hydraulic cylinder 36 is started to drive the slide plate 37 to move downward, so that the side plate 12 moves downward, and the packaging film is driven to fit the top of the packaging box. After a packaging box is pasted, the laminating roller 13 is controlled to move back by the hydraulic cylinder 36, and thus reciprocates. The laminating roller 13 is controlled to move downward once for each packaging of a packaging box.

[0037] Specifically, the air extraction assembly includes a first sleeve 31, which is fixedly mounted on the top of the air collecting box 30, the inner wall of the first sleeve 31 is slidably connected to the first piston plate 32, the top of the first piston plate 32 is fixedly connected to the first piston rod 33, one side of the first sleeve 31 is fixedly connected to the second connecting pipe 43, one end of the second connecting pipe 43 extends to the interior of the air collecting box 30, the top of the air collecting box 30 is fixedly connected to the sleeve 45, the first connecting pipe 42 is fixedly connected between the sleeve 45 and the first sleeve 31, the inner walls of the first connecting pipe 42 and the second connecting pipe 43 are both provided with first one-way valves 44, and the two first one-way valves 44 are both opened toward the sleeve 45, the inner wall of the box body 1 and located below the coating roller 13 are symmetrically fixedly connected to two support plates 19, the tops of the two support plates 19 are fixedly connected to the limiting plates 23, and the inner walls of the two limiting plates 23 are slidably connected A second sliding shaft 24 is connected, one end of the second sliding shaft 24 is fixedly connected to the top block 20, the other end of the second sliding shaft 24 is fixedly connected to the nozzle 26, the outer wall of the second sliding shaft 24 is sleeved with a third spring 25, one end of the third spring 25 is fixedly connected to the limit plate 23, the other end of the third spring 25 is fixedly connected to the nozzle 26, the bottom of the two nozzles 26 are each provided with an air outlet 27, the outer wall of the sleeve box 45 is symmetrically fixedly connected to two gas pipelines 28, the tops of the two gas pipelines 28 are both fixedly connected to the first hoses 29, the two first hoses 29 are respectively fixedly connected to the two nozzles 26, the bottom of the slide plate 37 is symmetrically fixedly connected to two push rods 38, the top of the push block 20 is provided with an inclined groove 21 used to cooperate with the push rod 38, the bottom of the push block 20 and the inner wall of the support plate 19 are both provided with a through groove 22 used to cooperate with the push rod 38, and the outer wall of the slide plate 37 is provided with a driving unit.

[0038] Through the above technical solution, a mixed gas of nitrogen and carbon dioxide is loaded into the gas collecting box 30. When the slide plate 37 moves upward, the first piston rod 33 is driven upward by the driving unit to move the first piston plate 32 upward. Under the pulling action of the first piston plate 32, the two first one-way valves 44 are cooperated to draw the mixed gas in the gas collecting box 30 along the second connecting pipe 43 into the first sleeve 31. When the slide plate 37 moves downward, the first piston rod 33 is driven downward by the driving unit to move the first piston plate 32 upward. The first piston plate 32 moves downward, and under the extrusion of the first piston plate 32, the two first one-way valves 44 are cooperated to squeeze the mixed gas in the first sleeve 31 into the sleeve box 45 along the first connecting pipe 42. The mixed gas entering the sleeve box 45 is transported to the two nozzles 26 along the two gas pipelines 28 and the two first hoses 29, and is ejected through the two gas outlets 27. Under the ejection of the mixed gas, the original gas in the packaging box is squeezed out, thereby completing the gas conditioning of the packaging box. When the slide plate 37 moves downward, it drives the two ejector rods 38 When the packaging film moves downward, the two ejector rods 38 are pressed against the two inclined slots 21 respectively. Under the pressure of the two ejector rods 38, the two inclined slots 21 are pushed to move to both sides respectively, driving the two ejector blocks 20 to move to both sides respectively, so that the two second slide shafts 24 move to both sides respectively, driving the two nozzles 26 to move to both sides respectively, and the second slide shafts 24 press the two third springs 25 while moving, thereby as the packaging film moves downward, the two nozzles 26 move away from the packaging box while spraying air. After the two nozzles 26 move away from the packaging box, the packaging film is controlled to continue to move downward to coat the packaging box, thereby shortening the gap between the gas conditioning operation and the coating operation, and preventing the loss of the mixed gas rushed into the packaging box after the gas conditioning. When the packaging film moves downward, the two ejector rods 38 also continue to move downward and are inserted into the through slot 22. After the coating of the packaging box is completed, the slide plate 37 is controlled to move upward again, driving the two ejector rods 38 and the packaging film to move upward. After losing the pressure of the two ejector rods 38, under the action of the two third springs 25, the two nozzles 26 are reset and moved to the top of the packaging box again.

[0039] Specifically, the driving unit includes a connecting frame 35, which is fixedly mounted on the outer wall of the slide plate 37. The top of the first piston rod 33 passes through the first sleeve 31 and is fixedly connected to the exhaust pipe 34. One end of the exhaust pipe 34 extends to the outside of the box body 1. One end of the connecting frame 35 passes through the box body 1 and is fixedly connected to the exhaust pipe 34. The connecting frame 35 and the exhaust pipe 34 are both slidably connected to the box body 1.

[0040] Through the above technical solution, when the slide plate 37 moves downward, it drives the connecting frame 35 to move downward, so that the exhaust pipe 34 moves downward, driving the first piston rod 33 to move downward. When the slide plate 37 moves upward, it drives the connecting frame 35 to move upward, so that the exhaust pipe 34 moves upward, driving the first piston rod 33 to move upward.

[0041] Specifically, the bottom of the second connecting pipe 43 is fixedly connected with an air intake ring 56, the inner wall of the air intake ring 56 is provided with an air intake groove 57, the air intake groove 57 is arranged in a ring shape, the outer wall of the air intake ring 56 is provided with a plurality of air intake ports 58 at equal intervals, the air intake ports 58 are communicated with the air intake groove 57, the outer wall of the air intake ring 56 is fixedly connected with a plurality of guide plates 59 at equal intervals, the guide plates 59 are fitted to the sides of the air intake ports 58, and the guide plates 59 between the two air intake ports 58 are in an eight-shape.

[0042] Through the above technical solution, while the first sleeve 31 is evacuating air, the mixed gas in the gas collecting box 30 enters the gas inlet groove 57 along the several air inlets 58 under the guidance of several guide plates 59, and the gas at different levels in the gas collecting box 30 is extracted through the air inlets 58 at different heights, thereby preventing nitrogen and nitrogen dioxide from precipitating in the gas collecting box 30 and affecting the preservation effect of the mixed gas.

[0043] Specifically, the inner wall of the sleeve 45 is rotatably connected to a rotating shaft 46, the bottom of the rotating shaft 46 is fixedly connected to a fan blade 47, the top of the rotating shaft 46 passes through the sleeve 45 and is fixedly connected to a second pulley 49, the outer wall of the output end of the motor 7 is fixedly connected to a first pulley 48, and the first pulley 48 and the second pulley 49 are connected for transmission via a transmission belt 50.

[0044] Through the above technical solution, when the motor 7 is started, it drives the first pulley 48 to rotate, and the second pulley 49 is driven to rotate through the set transmission belt 50, so that the rotating shaft 46 rotates, and the fan blades 47 are driven to rotate. Through the rotation of the fan blades 47, the mixed gas passing through the sleeve box 45 is stirred, so that the nitrogen and carbon dioxide are evenly mixed, thereby improving the preservation effect of the food in the packaging box.

[0045] Specifically, the exhaust pipe 34 is located at the top of the inner part of the box body 1 and is fixedly connected to the second sleeve 39. The inner wall of the second sleeve 39 is slidably connected to the second piston plate 41. The top of the second piston plate 41 is fixedly connected to the second piston rod 40. The top of the second piston rod 40 passes through the second sleeve 39 and is fixedly connected to the support plate 19. The inner wall of the exhaust pipe 34 is provided with two second one-way valves 51. The two second one-way valves 51 are symmetrically installed with the second sleeve 39 as the center. The two second one-way valves 51 are both opened to the outside of the box body 1. The top of the exhaust pipe 34 is fixedly connected to the second hose 52. One end of the second hose 52 is connected to the nozzle 26 on the left side. The inner wall of the nozzle 26 on the left side is fixedly connected to a partition. The partition is located between the first hose 29 and the second hose 52. An air intake port 53 is provided on one side of the nozzle 26 on the left side.

[0046] Through the above technical scheme, when the exhaust pipe 34 moves downward, it drives the second sleeve 39 to move downward. Under the pulling action of the second piston plate 41, the two second one-way valves 51 are cooperated to make the air inhalation start at the air inlet 53, thereby making the original gas squeezed out of the packaging box be sucked into the second sleeve 39 along the air inlet 53 and the second hose 52. When the exhaust pipe 34 moves upward, it drives the second sleeve 39 to move upward. Under the squeezing action of the second piston plate 41, the two second one-way valves 51 are cooperated to squeeze the gas in the second sleeve 39 out of the box body 1 along the exhaust pipe 34. Therefore, while the mixed gas of nitrogen and carbon dioxide is filled into the packaging box along the air outlet 27, the original gas squeezed out of the packaging box is sucked away through the air inlet 53 to prevent the mixed gas of nitrogen and carbon dioxide from mixing with the original gas in the packaging box.

[0047] Specifically, the bottom of the two nozzles 26 are fixedly connected with a second guide plate 55, and the two second guide plates 55 are installed at an angle. One side of the nozzle 26 located on the left is fixedly connected with a first guide plate 54, and the first guide plate 54 is located above the air intake port 53 and tilted downward.

[0048] Through the above technical scheme, the two second guide plates 55 are set up to make the mixed gas of nitrogen and carbon dioxide flow downward along the inclined surface of the second guide plates 55, so that the mixed gas of nitrogen and carbon dioxide impacts the inner wall of the packaging box, thereby facilitating the original gas of the packaging box to be squeezed upward from between the two second guide plates 55 while the packaging box is filled with the mixed gas. Through the first guide plate 54, the air intake port 53 can absorb the original gas of the packaging box squeezed upward.

[0049] Specifically, a mounting plate 14 is fixedly connected between the two side plates 12, a first sliding shaft 15 is slidably connected to the inner wall of the mounting plate 14, a limiting block 17 is fixedly connected to the top of the first sliding shaft 15, a top plate 18 is fixedly connected to the bottom of the first sliding shaft 15, a second spring 16 is sleeved on the outer wall of the first sliding shaft 15, a top of the second spring 16 is fixedly connected to the mounting plate 14, a bottom of the second spring 16 is fixedly connected to the top plate 18, an annular heater is arranged inside the top plate 18, and both sides of the top plate 18 are arranged as arc surfaces.

[0050] Through the above technical solution, after the slide plate 37 moves downward, it drives the packaging film to cover the packaging box. The second spring 16 is arranged to cooperate with the top plate 18 to achieve a good bonding effect between the packaging film and the packaging box. The packaging film in contact with the packaging box is heated and melted by the annular heater to make the packaging film fit the packaging box.

[0051] Specifically, installation grooves are opened on the four surfaces of the inner wall of the placement groove 9, and the inner walls of the four installation grooves are fixedly connected with first springs 10. One ends of the four first springs 10 are fixedly connected with clamping blocks 11. The four clamping blocks 11 are slidingly connected to the four installation grooves respectively, and one ends of the four clamping blocks 11 are set as inclined surfaces and extend to the interior of the placement groove 9.

[0052] Through the above technical solution, when the packaging box is placed in the placement groove 9, the packaging box presses against the inclined surfaces of the outer walls of the four blocks 11, so that the four blocks 11 move toward the inside of the rotating ring 4 at the same time, pressing the four first springs 10. When the packaging box completely enters the placement groove 9, the four first springs 10 drive the four blocks 11 to reset, and the four blocks 11 are used to guide the packaging box to improve the accuracy of subsequent gas conditioning and lamination.

[0053] When in use, a mixed gas of nitrogen and carbon dioxide is loaded into the gas collecting box 30, and the first piston rod 33 is controlled to move upward by the hydraulic cylinder 36 to move the first piston plate 32 upward. Under the pulling action of the first piston plate 32, the two first one-way valves 44 are cooperated to draw the mixed gas in the gas collecting box 30 along the second connecting pipe 43 into the first sleeve 31. While the first sleeve 31 is being evacuated, the mixed gas in the gas collecting box 30 enters the air inlet groove 57 along the several air inlets 58 under the guidance of several guide plates 59. The gas at different levels in the gas collecting box 30 is extracted through the air inlets 58 at different heights to prevent nitrogen and nitrogen dioxide from precipitating in the gas collecting box 30 and affecting the freshness-keeping effect of the mixed gas. The motor 7 is started, and the belt The movable gear 8 rotates to rotate the gear ring 6, driving the rotating ring 4 to rotate. When the placement slot 9 rotates to the position of the empty slot 5, the packaging box is placed in the placement slot 9, and the packaging box presses against the inclined surfaces of the outer walls of the four blocks 11, so that the four blocks 11 move toward the inside of the rotating ring 4 at the same time, pressing the four first springs 10. When the packaging box completely enters the placement slot 9, the four blocks 11 are reset by the four first springs 10, and the packaging box is guided by the four blocks 11 to improve the accuracy of subsequent gas conditioning and laminating. When the motor 7 is started, it drives the first pulley 48 to rotate, and drives the second pulley 49 to rotate through the set transmission belt 50, so that the rotating shaft 46 rotates, driving the fan blades 47 to rotate, and the mixed gas passing through the sleeve box 45 is stirred by the rotation of the fan blades 47. , so that the nitrogen and carbon dioxide are evenly mixed, and the preservation effect of the food in the packaging box is improved. As the rotating ring 4 continues to rotate, when the packaging box rotates to the bottom of the two nozzles 26, the hydraulic cylinder 36 is started to drive the slide plate 37 to move downward, drive the connecting frame 35 to move downward, move the exhaust pipe 34 downward, drive the first piston rod 33 to move downward, and move the first piston plate 32 downward. Under the extrusion of the first piston plate 32, in cooperation with the two first one-way valves 44, the mixed gas in the first sleeve 31 is squeezed into the sleeve box 45 along the first connecting pipe 42. The mixed gas entering the sleeve box 45 is transported to the two nozzles 26 along the two gas pipelines 28 and the two first hoses 29, and is ejected through the two gas outlets 27. Under the ejection effect of the mixed gas The original gas in the packaging box is squeezed out, and when the exhaust pipe 34 moves downward, the second sleeve 39 is driven to move downward. Under the pulling action of the second piston plate 41, the two second one-way valves 51 are cooperated to make the air inhalation at the air inlet 53, so that the original gas squeezed out of the packaging box is sucked into the second sleeve 39 along the air inlet 53 and the second hose 52, thereby completing the gas adjustment of the packaging box. When the slide plate 37 moves downward, the two push rods 38 are driven to move downward, and the two push rods 38 are respectively pressed against the two inclined grooves 21. Under the squeezing of the two push rods 38, the two inclined grooves 21 are pushed to move to both sides respectively, driving the two top blocks 20 to move to both sides respectively, so that the two second sliding shafts 24 are moved to both sides respectively, driving the two nozzles 26 to move to both sides respectively,The second sliding shaft 24 moves while compressing the two third springs 25, so that as the packaging film moves downward, the two nozzles 26 move away from the packaging box while spraying air. After the two nozzles 26 move away from the packaging box, the packaging film is controlled to continue to move downward to coat the packaging box, thereby shortening the gap between the gas conditioning operation and the coating operation to prevent the loss of the mixed gas rushed in after the gas conditioning of the packaging box. The packaging film covers the packaging box, and the second spring 16 is provided to cooperate with the top plate 18 to ensure a good bonding effect between the packaging film and the packaging box. The packaging film in contact with the packaging box is heated and melted by the annular heater to make the packaging film fit the packaging box. After pasting one packaging box, the coating roller 13 is controlled to move back by the hydraulic cylinder 36, thereby reciprocating. When each packaging box is packaged, the coating roller 13 is controlled to move downward once. After the hydraulic cylinder 36 is retracted, it drives the exhaust pipe 34 to move upward, so that the first The second sleeve 39 moves upward, and under the squeezing action of the second piston plate 41, the two second one-way valves 51 are used to squeeze the gas in the second sleeve 39 out of the box 1 along the exhaust pipe 34. As a result, while the mixed gas of nitrogen and carbon dioxide is filled into the packaging box along the gas outlet 27, the original gas squeezed out of the packaging box is sucked away through the air inlet 53 to prevent the mixed gas of nitrogen and carbon dioxide from mixing with the original gas in the packaging box. When the exhaust pipe 34 moves upward, it drives the first piston rod 33 to move upward, so that the first piston plate 32 moves upward. Under the pulling action of the first piston plate 32, the two first one-way valves 44 are used to draw the mixed gas in the gas collecting box 30 along the second connecting pipe 43 into the first sleeve 31. The packaged packaging box continues to rotate with the rotating ring 4. When it rotates to the position of the empty slot 5 again, it is taken out and put into a new packaging box.

[0054] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0056] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A rotary modified atmosphere packaging machine, characterized in that: The invention comprises a box body (1), wherein a support frame (2) is fixedly connected to the bottom of the inner wall of the box body (1), a support ring (3) is slidably connected to the top of the support frame (2), a rotating ring (4) is fixedly connected to the top of the support ring (3), a plurality of placement grooves (9) are equidistantly provided on the top of the rotating ring (4), a motor (7) is fixedly connected to the bottom of the inner wall of the box body (1), a gear (8) is fixedly connected to the output end of the motor (7), a gear ring (6) is fixedly connected to the inner wall of the rotating ring (4), the gear (8) is meshingly connected to the gear ring (6), an empty groove (5) is provided on the outer wall of the box body (1), a film coating assembly is provided on the top of the inner wall of the box body (1), a gas collecting box (30) is fixedly connected to the bottom of the inner wall of the box body (1), and a gas extraction assembly is provided on the top of the gas collecting box (30); The laminating assembly comprises a hydraulic cylinder (36), the hydraulic cylinder (36) being fixedly mounted on the top of the inner wall of the box body (1), the output end of the hydraulic cylinder (36) being fixedly connected to a slide plate (37), the bottom of the slide plate (37) being symmetrically fixedly connected to two side plates (12), and a laminating roller (13) being arranged between the two side plates (12); The air extraction assembly comprises a first sleeve (31), the first sleeve (31) being fixedly mounted on the top of the air collecting box (30), the inner wall of the first sleeve (31) being slidably connected to a first piston plate (32), the top of the first piston plate (32) being fixedly connected to a first piston rod (33), one side of the first sleeve (31) being fixedly connected to a second connecting pipe (43), one end of the second connecting pipe (43) extending into the interior of the air collecting box (30), the top of the air collecting box (30) being fixedly connected to a sleeve box (45), the sleeve box A first connecting pipe (42) is fixedly connected between the first connecting pipe (45) and the first sleeve (31), and the inner walls of the first connecting pipe (42) and the second connecting pipe (43) are both provided with first one-way valves (44), and the two first one-way valves (44) are both opened toward the sleeve box (45). The inner wall of the box body (1) and below the laminating roller (13) are symmetrically fixedly connected to two support plates (19), the tops of the two support plates (19) are fixedly connected to the limiting plates (23), and the inner walls of the two limiting plates (23) are slidably connected to the second A sliding shaft (24), one end of the second sliding shaft (24) is fixedly connected to a top block (20), the other end of the second sliding shaft (24) is fixedly connected to a nozzle (26), the outer wall of the second sliding shaft (24) is sleeved with a third spring (25), one end of the third spring (25) is fixedly connected to a limit plate (23), the other end of the third spring (25) is fixedly connected to the nozzle (26), the bottoms of the two nozzles (26) are both provided with air outlets (27), and the outer wall of the sleeve box (45) is symmetrically fixedly connected to two gas pipelines (28), the tops of the two gas pipelines (28) are fixedly connected to a first hose (29), the two first hoses (29) are fixedly connected to the two nozzles (26) respectively, the bottom of the slide plate (37) is symmetrically fixedly connected to two push rods (38), the top of the top block (20) is provided with an inclined groove (21) used in conjunction with the push rod (38), the bottom of the top block (20) and the inner wall of the support plate (19) are both provided with a through groove (22) used in conjunction with the push rod (38), and the outer wall of the slide plate (37) is provided with a driving unit; The drive unit comprises a connecting frame (35), the connecting frame (35) being fixedly mounted on the outer wall of the slide plate (37), the top of the first piston rod (33) passing through the first sleeve (31) and being fixedly connected to an exhaust pipe (34), one end of the exhaust pipe (34) extending to the outside of the box body (1), one end of the connecting frame (35) passing through the box body (1) and being fixedly connected to the exhaust pipe (34), and the connecting frame (35) and the exhaust pipe (34) being both slidably connected to the box body (1); The exhaust pipe (34) is located at the top of the inner part of the box body (1) and is fixedly connected to a second sleeve (39); the inner wall of the second sleeve (39) is slidably connected to a second piston plate (41); the top of the second piston plate (41) is fixedly connected to a second piston rod (40); the top of the second piston rod (40) passes through the second sleeve (39) and is fixedly connected to the support plate (19); the inner wall of the exhaust pipe (34) is provided with two second one-way valves (51); the two second one-way valves (51) are connected to the inner wall of the exhaust pipe (34); The second sleeve (39) is installed symmetrically with respect to the center, and the two second one-way valves (51) are both opened toward the outside of the box body (1). A second hose (52) is fixedly connected to the top of the exhaust pipe (34), and one end of the second hose (52) is connected to the nozzle (26) located on the left. A partition is fixedly connected to the inner wall of the nozzle (26) located on the left, and the partition is located between the first hose (29) and the second hose (52). An air inlet (53) is opened on one side of the nozzle (26) located on the left.

2. A rotary modified atmosphere packaging machine according to claim 1, characterized in that: An air intake ring (56) is fixedly connected to the bottom of the second connecting pipe (43); an air intake groove (57) is provided on the inner wall of the air intake ring (56); the air intake groove (57) is arranged in a ring shape; a plurality of air intake ports (58) are equidistantly provided on the outer wall of the air intake ring (56); the air intake ports (58) are communicated with the air intake groove (57); a plurality of guide plates (59) are fixedly connected to the outer wall of the air intake ring (56) at an equal distance; the guide plates (59) are fitted to the side surfaces of the air intake ports (58); and the guide plate (59) between two air intake ports (58) is in an eight-shaped shape.

3. A rotary modified atmosphere packaging machine according to claim 2, characterized in that: The inner wall of the sleeve (45) is rotatably connected to a rotating shaft (46), the bottom of the rotating shaft (46) is fixedly connected to a fan blade (47), the top of the rotating shaft (46) passes through the sleeve (45) and is fixedly connected to a second belt pulley (49), the outer wall of the output end of the motor (7) is fixedly connected to a first belt pulley (48), and the first belt pulley (48) and the second belt pulley (49) are connected in transmission via a transmission belt (50).

4. A rotary modified atmosphere packaging machine according to claim 3, characterized in that: The bottoms of the two nozzles (26) are fixedly connected to a second guide plate (55), and the two second guide plates (55) are both installed at an angle. One side of the nozzle (26) located on the left is fixedly connected to a first guide plate (54), and the first guide plate (54) is located above the air inlet (53) and is tilted downward.

5. A rotary modified atmosphere packaging machine according to claim 4, characterized in that: A mounting plate (14) is fixedly connected between the two side plates (12); a first sliding shaft (15) is slidably connected to the inner wall of the mounting plate (14); a top of the first sliding shaft (15) is fixedly connected to a limiting block (17); a bottom of the first sliding shaft (15) is fixedly connected to a top plate (18); a second spring (16) is sleeved on the outer wall of the first sliding shaft (15); a top of the second spring (16) is fixedly connected to the mounting plate (14); a bottom of the second spring (16) is fixedly connected to the top plate (18); an annular heater is arranged inside the top plate (18); and both sides of the top plate (18) are arranged as arc surfaces.

6. The rotary modified atmosphere packaging machine according to claim 5, characterized in that: The four surfaces of the inner wall of the placement groove (9) are provided with mounting grooves, the inner walls of the four mounting grooves are fixedly connected with first springs (10), one ends of the four first springs (10) are fixedly connected with clamping blocks (11), the four clamping blocks (11) are slidably connected to the four mounting grooves respectively, and one ends of the four clamping blocks (11) are arranged as inclined surfaces and extend into the interior of the placement groove (9).

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