CN114313493B - Vacuum packaging device and packaging method for disposable sterile puerpera nursing bag - Google Patents

Abstract

The invention relates to the technical field of nursing package packaging, and discloses a vacuum packaging device and a packaging method for disposable sterile puerperal nursing packages, wherein the vacuum packaging device comprises an operation table, a conveying belt is arranged on the operation table, an upper packaging mechanism is arranged above the conveying belt, lower packaging mechanisms are arranged on two sides of the conveying belt, and an air exhaust mechanism is arranged on one side of one lower packaging mechanism; the upper packaging mechanism comprises a fixed plate with a cavity structure inside, the fixed plate is connected with the lifting mechanism above the fixed plate, the fixed plate is connected with an extrusion plate through a first compression spring, a sealing part is arranged on the periphery of the extrusion plate, and the extrusion plate can perform up-and-down sealing sliding motion in the cavity of the fixed plate through the sealing part; the automatic collecting and discharging device realizes the automatic collection and discharge of impurities such as cotton and silk filtered by the filter screen in the filter tip, reduces the workload of manually cleaning the impurities generated in the process of manually cleaning the nursing pad in the nursing bag, and improves the automation degree of the nursing bag packaging.

Description

Vacuum packaging device and packaging method for disposable sterile puerpera nursing bag

Technical Field

The invention belongs to the technical field of nursing bag packaging, and particularly relates to a vacuum packaging device and a packaging method for a disposable sterile puerpera nursing bag.

Background

The puerpera nursing bag is a necessary close-fitting nursing article suit for puerpera produced according to the medical grade aiming at the puerperal period of puerpera of the pregnant women; a plurality of independent nursing pads which are sterilized by ethylene oxide are arranged in the disposable sterile puerpera nursing pad, and the disinfected nursing pads can be directly contacted with the affected part of the puerpera, so that infection and discomfort are effectively avoided; and generally adopts cotton, has stronger water absorption, can prevent the side leakage and the backflow of postpartum lochia, has large-area air permeability, and is not easy to cause irritation to the skin to cause discomfort.

The nursing pad is stacked in the nursing bag in a sterile environment after being sterilized and disinfected by ethylene oxide, and then the nursing bag is vacuum-packed; the application number is 201911130167.9 discloses a sterile type automatic packaging machine, this kind of sterile type automatic packaging machine, the back falls in upper portion layering, receive stopping of air suction mouth, the bullet piece jack-up that makes progress, with the spring compression, the opening that makes the wrapping bag only leaves with air suction mouth size the same, the wrapping bag is totally enclosed when guaranteeing to bleed, when air suction mouth withdraws from the wrapping bag, the spring resumes original length, seal tightly the opening of wrapping bag through the bullet piece, thereby improve the efficiency of evacuation.

However, as the nursing pads are made of cotton materials with good water absorption, and the nursing pads are stacked in the nursing bag conveniently, the gaps in the nursing pads and the gaps between the nursing pads are large, and only the blower is used for vacuumizing in the vacuumizing process, on one hand, the vacuumizing time is long, so that the efficiency is low, and the service life of the vacuum machine is easy to reduce; on the other hand, the nursing pad is made of cotton, cotton threads are generated in the vacuumizing process, the air suction nozzle is easy to block, manual cleaning of the filter element is troublesome, and the workload is increased; therefore, there is a need for an improved aseptic vacuum packaging machine, which solves the above technical problems and improves the packaging effect of disposable aseptic puerpera care bags.

Disclosure of Invention

In view of the above situation, in order to overcome the defects of the prior art, the invention provides a vacuum packaging device and a packaging method for a disposable sterile puerperal care bag, which improve the existing sterile vacuum packaging machine, solve the problems of the technical background and improve the packaging effect of the disposable sterile puerperal care bag.

In order to achieve the purpose, the invention provides the following technical scheme: a disposable sterile vacuum packaging device for a puerperal nursing bag comprises an operation table, wherein a conveying belt is arranged on the operation table, an upper packaging mechanism is arranged above the conveying belt, lower packaging mechanisms are arranged on two sides of the conveying belt, and an air exhaust mechanism is arranged on one side of one lower packaging mechanism;

the upper packaging mechanism comprises a fixed plate with a cavity structure inside, the fixed plate is connected with an upper lifting mechanism, the fixed plate is connected with an extrusion plate through a first compression spring, a sealing part is arranged on the periphery of the extrusion plate, and the extrusion plate can perform up-and-down sealing sliding motion in the cavity of the fixed plate through the sealing part; a vent hole is formed in one side of the fixing plate and communicated with a cavity in the fixing plate through a first channel, and a first electric control valve is arranged in the first channel; the cavity in the fixed plate is communicated with an external collecting mechanism through a second channel, and a second electric control valve is arranged in the second channel;

the upper packaging mechanism comprises a first sealing part and a second sealing part which are respectively arranged on two sides of the lower part of the extrusion plate, and the first sealing part comprises a first telescopic column and a first welding block; the second sealing part comprises a second telescopic column, the second telescopic column is connected with a second welding part, the second welding part comprises a fixed welding part, cavities are formed in two sides of the second welding part, a second compression spring is arranged in each cavity, and the second compression spring is connected with a second welding block;

the lower packaging mechanism comprises lower lifting columns with the same structure, and lower welding parts are arranged on the lower lifting columns; the lower welding part on one side corresponds to the first welding block, and the lower welding part on the other side corresponds to the fixed welding part and the second welding block;

the air extracting mechanism comprises an air extracting nozzle, a filter screen is arranged in the air extracting nozzle, the air extracting nozzle is connected with an external air extractor through a pipeline, the bottom of the air extracting nozzle is connected with the base in a sliding mode through a third telescopic column, and the base is fixed on the operating table;

the lifting mechanism compresses the first compression spring through the fixing plate and drives the extrusion plate to move downwards to a first height, and after the multi-layer nursing pads in the nursing bag above the conveying belt are extruded to remove air in gaps among the multi-layer nursing pads, the nursing bag is subjected to one-time welding by the upper packaging mechanism and the lower packaging mechanism while being exhausted by the exhaust nozzle; the lifting mechanism compresses the first compression spring again through the fixing plate and drives the extrusion plate to move downwards to a second height, the second compression spring is compressed, and the suction nozzle extends into the vent hole while the fixed welding part performs secondary welding on the nursing bag; and in the process that the lifting mechanism drives the fixing plate to move upwards, impurities filtered in the air suction nozzle are sucked into the cavity of the fixing plate.

The invention also comprises a disposable sterile vacuum packaging device for the puerperal care bag for packaging the care bag, which comprises the following steps:

s1, controlling the conveyor belt to convey a nursing packet to be packaged to the position right below the upper packaging mechanism; controlling the first electric control valve to be closed and the second electric control valve to be opened;

s2, enabling the lifting mechanism to compress a first compression spring through a fixing plate and drive a squeezing plate to move downwards to a first height, and squeezing the to-be-packaged nursing packet by the squeezing plate so as to remove air in gaps among a plurality of layers of nursing pads in the nursing packet and air in the nursing pads;

s3, controlling the first telescopic column of the first sealing part to extend, and simultaneously controlling the corresponding lower lifting column to extend, so that the first welding block and the lower welding part jointly weld one side of the nursing bag;

s4, controlling a third telescopic column to drive a suction nozzle to extend into the other side of the nursing bag; simultaneously controlling the extension of a second telescopic column of the second sealing part and the extension of a corresponding lower lifting column, so that a second welding block of the second welding part and the lower welding part are welded on one side of the nursing bag together;

s5, controlling an external air extractor, and vacuumizing the nursing bag through an air extracting nozzle;

s6, controlling the third telescopic column to drive the air suction nozzle to withdraw from the nursing bag, controlling the lifting mechanism to drive the first compression spring to be compressed again through the fixing plate and drive the extrusion plate to move downwards to a second height, compressing the second compression spring, and welding the side part of the nursing bag inserted into the air suction nozzle at the fixed welding part and the lower welding part;

s7, after welding of the two sides of the nursing packet is completed, the extrusion plate is kept at a second height, the first electric control valve is controlled to be opened, and the second electric control valve is controlled to be closed; controlling the third telescopic column to drive the air exhaust nozzle to be inserted into the vent hole;

s8, controlling the lifting mechanism to drive the fixing plate to move upwards, enabling the fixing plate to drive the air suction nozzle to move upwards synchronously, enabling the first compression spring to restore elastic deformation, increasing the volume of a cavity in the fixing plate and forming negative pressure, and sucking sundries on a filter screen in the air suction nozzle into the fixing plate and temporarily storing the sundries;

and S9, in the process of controlling the lifting mechanism to move downwards again, controlling the first electric control valve to be opened and the second electric control valve to be closed, reducing the volume of the cavity in the fixed plate, and discharging sundries stored in the cavity into the external collecting mechanism through the second channel to finish discharging and collecting the sundries.

Compared with the prior art, the invention has the beneficial effects that:

1. before the nursing bags are welded, when the fixing plate is brought to a first height position through the lifting mechanism, on one hand, the fixing plate drives the extrusion plate to extrude the nursing bags provided with the multiple layers of nursing pads so as to discharge air in gaps among the nursing pads and gaps inside the nursing pads, further, the air suction amount and the working time of an external air suction machine are reduced, and further, the service life of the air suction machine is prolonged; on the other hand, the two sides of the nursing bag (excluding the side part of the nursing bag corresponding to the position of the air suction nozzle) are welded;

2. in the invention, when the fixing plate is brought to the second height position through the lifting mechanism, on one hand, the second compression spring is compressed, and the fixed welding part welds the side part of the nursing bag at the exit position of the air suction nozzle, so that the integrity of the welding of the nursing bag is ensured; on the other hand, after the third telescopic column drives the air suction nozzle to withdraw from the nursing bag package, the air suction nozzle is inserted into the vent hole to prepare for discharging impurities such as cotton and silk filtered by the filter screen in the air suction nozzle;

3. in the invention, in the process that the fixed plate is driven by the lifting mechanism to move up and down, when the fixed plate is driven by the lifting mechanism to move down, the first electric control valve is closed, the second electric control valve is opened, when the extrusion plate is blocked by the nursing bag and can not move down, the first compression spring is compressed, the cavity between the fixed plate and the extrusion plate is gradually reduced, and cotton silk impurities stored in the cavity can be discharged into the external collecting mechanism along with air from the outside of the second channel; when the lifting mechanism drives the fixed plate to move upwards, the first electric control valve is opened, the second electric control valve is closed, the first compression spring gradually recovers elastic deformation along with the gradual upward movement of the fixed plate, a cavity between the fixed plate and the extrusion plate gradually becomes large, negative pressure formed inside the cavity can suck sundries such as cotton fibers and the like filtered on the filter screen in the suction nozzle into the cavity through the first channel and the vent hole and store the sundries, and the sundries such as the cotton fibers and the like stored in the cavity can be discharged into the external collection mechanism from the outside of the second channel in the process that the fixed plate moves downwards again; so, through the motion that makes first automatically controlled valve and second automatically controlled valve cooperation fixed plate and stripper plate, realized collecting and discharging the automation of debris such as the filterable cotton silk of filter screen in the suction nozzle, reduced the work load of the debris that the in-process produced of nursing pad in the manual cleaning packing nursing package, improved the automatic degree of nursing package packing.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

FIG. 1 is a schematic view of the overall structure of the packaging device of the present invention;

FIG. 2 is a schematic view showing the position and structure of each part of the nursing package before being extruded by the extrusion plate according to the present invention;

FIG. 3 is a schematic view showing the position and structure of the components of the nursing package after being extruded by the extrusion plate according to the present invention;

FIG. 4 is a schematic side view of a welding kit for a first sealing portion and a lower welding portion according to the present invention;

FIG. 5 is a schematic view of another side of the welding nursing packet for the second welding part and the lower welding part according to the present invention;

FIG. 6 is a schematic view of the structure of the suction nozzle inserted into the ventilation hole of the present invention;

FIG. 7 is a schematic view showing an initial position structure of a second weld block and a fixed weld;

fig. 8 is a schematic structural view of the second welding block and the fixed welding position after the second compression spring is compressed.

Reference numerals: 1. an operation table; 2. a conveyor belt; 3. a packaging mechanism is arranged; 301. a fixing plate; 3011. a vent hole; 3012. a first channel; 3013. a second channel; 302. a first compression spring; 303. a pressing plate; 304. a sealing part; 305. a first seal portion; 3051. a first telescopic column; 3052. a first welding block; 306. a second seal portion; 3061. a second telescopic column; 307. a second weld; 308. fixing the welding part; 309. a second compression spring; 310. a second welding block; 4. a lower packaging mechanism; 401. a lower lifting column; 402. a lower weld; 5. an air exhaust mechanism; 501. a suction nozzle; 502. a third telescopic column; 6. a lifting mechanism; 7. a base; 8. a nursing bag.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-8, a disposable sterile vacuum packaging device for a puerperal care bag comprises an operation table 1, wherein a conveyor belt 2 is arranged on the operation table 1, an upper packaging mechanism 3 is arranged above the conveyor belt 2, the upper packaging mechanism 3 comprises a fixed plate 301 with a cavity structure inside, the fixed plate 301 is connected with an upper lifting mechanism 6, the fixed plate 301 is connected with a squeezing plate 303 through a first compression spring 302, a sealing part 304 is arranged on the periphery of the squeezing plate 303, and the squeezing plate 303 slides up and down in the cavity of the fixed plate 301 in a sealing manner through the sealing part 304; a vent hole 3011 is arranged on one side of the fixing plate 301, the vent hole 3011 is communicated with a cavity inside the fixing plate 301 through a first channel 3012, and a first electric control valve is arranged in the first channel 3012; the cavity inside the fixing plate 301 is communicated with an external collecting mechanism through a second channel 3013, and a second electric control valve is arranged in the second channel 3013.

Specifically, by controlling the first electric control valve and the second electric control valve to work in cooperation with each other, when the fixed plate 301 and the extrusion plate 303 move relatively: when the fixed plate 301 moves downwards, the first electric control valve is closed, the second electric control valve is opened, when the squeezing plate 303 is blocked by the nursing packet 8 and cannot move downwards, the first compression spring 302 is compressed, the cavity between the fixed plate 301 and the squeezing plate 303 is gradually reduced, and cotton wool sundries stored in the cavity are discharged to an external collection mechanism along with air from the second channel 3013; when the fixing plate 301 moves upwards, the first electric control valve is opened, the second electric control valve is closed, along with the gradual upward movement of the fixing plate 301, the first compression spring 302 gradually recovers elastic deformation, the cavity between the fixing plate 301 and the extrusion plate 303 gradually becomes larger, negative pressure formed inside the cavity can suck sundries such as cotton threads and the like filtered on the filter screen in the air suction nozzle 501 into the cavity through the first channel 3012 and the vent hole 3011 and store the sundries, and in the process that the fixing plate 301 moves downwards again, the sundries such as the cotton threads and the like stored in the cavity can be discharged to an external collection mechanism from the second channel 3013; so, through the motion that makes first electric control valve and second electric control valve cooperation fixed plate 301 and stripper plate 303, realized collecting and discharging the automation of debris such as the filterable cotton silk of filter screen in the suction nozzle 501, reduced the work load of the interior nursing pad in-process production of manual cleaning packing nursing package, improved the automatic degree of nursing package packing.

The upper packing mechanism 3 includes a first sealing part 305 and a second sealing part 306 respectively disposed at both sides of the lower portion of the pressing plate 303, the first sealing part 305 includes a first telescopic column 3051 and a first welding block 3052; the second sealing portion 306 comprises a second telescopic column 3061, the second telescopic column 3061 is connected with a second welding portion 307, the second welding portion 307 comprises a fixed welding portion 308, two sides of the second welding portion 307 are provided with cavities, a second compression spring 309 is arranged in each cavity, and the second compression spring 309 is connected with a second welding block 310; the two sides of the conveyor belt 2 are provided with lower packaging mechanisms 4, each lower packaging mechanism 4 comprises a lower lifting column 401 with the same structure, and a lower welding part 402 is arranged on each lower lifting column 401; the lower welding part 402 of one side corresponds to the first welding block 3052, and the lower welding part 402 of the other side corresponds to the fixed welding part 308 and the second welding block 310.

Wherein, the first telescopic column 3051 and the first welding block 3052 of the first sealing part 305 are configured to correspond to the lower lifting column 401 and the lower welding part 402 of the lower packing mechanism 4 to weld one side of the nursing packet 88; the second welding block 310 of the second sealing part 306 welds the other side of the nursing bag 8 when the fixing plate 301 is located at the first height position; after the nursing bag 8 is completely bled by the suction nozzle 501, the fixing plate 301 moves to the second height position, so that the second compression spring 309 is compressed, the second welding block 310 moves upwards and retracts into the cavity of the second welding part 307, and then the fixing welding part 308 can be matched with the corresponding lower welding part 402 to weld the outer part of the nursing bag 8 at the suction nozzle 501, and the integrity of welding is ensured.

In order to ensure that the fixing plate 301 moves to the second height position, so that the fixing welding portion 308 can be matched with the corresponding lower welding portion 402 to weld the outer side portion of the nursing bag 8 at the air suction nozzle 501, the stiffness coefficient of the second compression spring 309 is made larger than the progress coefficient of the first compression spring 302, so as to ensure that the first compression spring 302 is compressed and the second compression spring 309 is not compressed when the other side of the nursing bag 8 is welded, and the fixing welding portion 308 does not influence the air suction nozzle 501 to suck the nursing bag 8; on the other hand, after the air suction nozzle 501 finishes sucking air and exits the care package 8, when the extrusion plate 303 moves to the second height and the second compression spring 309 is compressed, the lower surface of the fixed welding portion 308 is equal to the lower surface of the second welding block 310, so that the fixed welding portion 308 and the lower welding portion 402 weld the position of the care package 8 where the air suction nozzle 501 exits, and the welding integrity of the care package 8 is ensured.

One side of one lower packaging mechanism 4 is provided with an air exhaust mechanism 5; air exhaust mechanism 5 includes air exhaust mouth 501, is equipped with the filter screen in the air exhaust mouth 501, and air exhaust mouth 501 is connected with outside air extractor through the pipeline, and air exhaust mouth 501's bottom is through third flexible post 502 and base 7 sliding connection, and base 7 is fixed on operation panel 1.

The end of the air suction nozzle 501 is conical, the diameter of the vent hole 3011 is larger than that of the front end of the air suction nozzle 501, and a flexible sealing gasket is arranged in the vent hole 3011 to ensure that after the air suction nozzle 501 is inserted into the vent hole 3011, the flexible sealing gasket can seal the air suction nozzle 501 to ensure that impurities such as cotton fibers and the like filtered on a filter screen in the air suction nozzle 501 can be smoothly sucked away through the vent hole 3011 in the follow-up process; when the fixing plate 301 is located at the second height, the height of the vent hole 3011 is equal to the height of the air suction nozzle 501, so as to ensure that after the air suction nozzle 501 finishes sucking air to the nursing bag 8 and exits, and after the fixing plate 301 reaches the second height, the third telescopic column 502 extends and drives the air suction nozzle 501 to be inserted into the vent hole 3011, and then the air suction nozzle 501 can be sucked through the vent hole 3011; the base 7 is provided with a sliding groove, the end part of the third telescopic column 502 is provided with a sliding block, and the sliding block slides in the sliding groove. When the fixing plate 301 moves upwards to increase the volume of the internal cavity to form negative pressure so as to suck air into the air suction nozzle 501, the fixing plate 301 can synchronously drive the air suction nozzle 501 and the third telescopic column 502 to move upwards, so that the air suction nozzle 501 is continuously sucked to suck impurities on a filter screen inside the air suction nozzle 501; after the sliding block moves upwards in the sliding groove, the air suction nozzle 501 exits from the vent hole 3011, and the third telescopic column 502 drives the sliding block to move downwards in the sliding groove to the initial position, so that preparation is provided for removing impurities such as cotton threads on the filter screen inside the air suction nozzle 501 at the next time.

Due to the arrangement of the structure, when two sides of the nursing packet 8 are welded and packaged, the lifting mechanism 6 compresses the first compression spring 302 through the fixing plate 301 and drives the extrusion plate 303 to move downwards to the first height, after the multi-layer nursing pads in the nursing packet 8 above the conveyor belt 2 are extruded to remove air in gaps among the multi-layer nursing pads, the air suction nozzle 501 sucks air from the nursing packet 8, and the upper packaging mechanism 3 and the lower packaging mechanism 4 weld the nursing packet 8 at one time; the lifting mechanism 6 compresses the first compression spring 302 again through the fixing plate 301 and drives the extrusion plate 303 to move downwards to a second height, the second compression spring 309 is compressed, the fixed welding part 308 performs secondary welding on the nursing packet 8, and meanwhile, the air suction nozzle 501 extends into the vent hole 3011; in the process that the lifting mechanism 6 drives the fixing plate 301 to move upwards, impurities filtered in the air suction nozzle 501 are sucked into the cavity of the fixing plate 301. Therefore, before the nursing packet 8 is welded, when the fixing plate 301 is brought to the first height position through the lifting mechanism 6, on one hand, the fixing plate 301 drives the extrusion plate 303 to extrude the nursing packet 8 provided with the plurality of layers of nursing pads so as to exhaust air in gaps among the nursing pads and gaps inside the nursing pads, further reduce the air extraction amount and the working time of an external air extractor, and further prolong the service life of the air extractor; on the other hand, the two sides of the nursing bag 8 (excluding the side part of the nursing bag 8 corresponding to the position of the air suction nozzle 501) are welded; when the fixing plate is brought to the second height position through the lifting mechanism 6, on one hand, the second compression spring 309 is compressed, and the fixing welding part 308 welds the side part of the nursing packet 8 at the exit position of the air suction nozzle 501, so that the welding integrity of the nursing packet 8 is ensured; on the other hand, the third telescopic column 502 drives the suction nozzle 501 to withdraw from the package of the nursing bag 8 and then to be inserted into the vent hole 3011, so as to prepare for discharging the impurities such as the cotton and the like filtered by the filter screen in the suction nozzle 501.

When the lifting mechanism 6 drives the fixing plate 301 to move up and down, the first electric control valve is closed, the second electric control valve is opened, when the lifting mechanism 6 drives the fixing plate 301 to move down, the extrusion plate 303 is blocked by the protective bag 8 and cannot move down, the first compression spring 302 is compressed, a cavity between the fixing plate 301 and the extrusion plate 303 is gradually reduced, and cotton fiber impurities stored in the cavity are discharged to an external collecting mechanism along with air from the second channel 3013; when the lifting mechanism 6 drives the fixing plate 301 to move upwards, the first electric control valve is opened, the second electric control valve is closed, along with the gradual upward movement of the fixing plate 301, the first compression spring 302 gradually restores elastic deformation, the cavity between the fixing plate 301 and the extrusion plate 303 gradually becomes larger, negative pressure formed inside the cavity can suck and store sundries such as cotton fibers and the like filtered on the filter screen in the air suction nozzle 501 into the cavity through the first channel 3012 and the vent holes 3011, and in the process that the fixing plate 301 moves downwards again, the sundries such as cotton fibers and the like stored in the cavity can be discharged to an external collection mechanism from the second channel 3013; so, through the motion that makes first electric control valve and second electric control valve cooperation fixed plate 301 and stripper plate 303, realized collecting and discharging the automation of debris such as the filterable cotton silk of filter screen in the suction nozzle 501, reduced the work load of the debris that the manual cleaning packing nursing pad in-process produced, improved the automatic degree of nursing package packing.

In order to facilitate the use of the vacuum packaging device for the nursing bag, the invention also comprises a vacuum packaging method for the disposable sterile puerperal nursing bag, which comprises the following steps:

s1, controlling a conveyor belt 2 to enable the conveyor belt 2 to convey a nursing packet 8 to be packaged to the position right below an upper packaging mechanism 3; the first electric control valve is controlled to be closed, the second electric control valve is controlled to be opened, and preparation is made for welding the nursing packet 8 and removing cotton silk impurities stored in the cavity between the fixed plate 301 and the extrusion plate 303.

S2, enabling the lifting mechanism 6 to compress a first compression spring 302 through a fixing plate 301 and drive a squeezing plate 303 to move downwards to a first height, and squeezing the to-be-packaged nursing packet 8 through the squeezing plate 303 so as to remove air in gaps among multiple layers of nursing pads in the nursing packet 8 and air in the nursing pads; on one hand, the air pumping amount and the working time of the external air pump can be reduced, and the service life of the air pump is further prolonged; on the other hand, under the state that the first electric control valve is closed and the second electric control valve is opened, the cotton and silk impurities stored in the cavity between the fixing plate 301 and the squeezing plate 303 are discharged to an external collecting mechanism along with air from the second channel 3013.

S3, controlling the extension of the first telescopic column 3051 of the first sealing part 305 and the extension of the corresponding lower lifting column 401 at the same time, so that the first welding block 3052 and the lower welding part 402 jointly weld one side of the nursing packet 8; this prevents outside air from entering the nursing container 8 through the nursing container 8.

S4, controlling the third telescopic column 502 to drive the air suction nozzle 501 to extend into the other side of the nursing bag 8; simultaneously controlling the second telescopic column 3061 of the second sealing part 306 to extend, and simultaneously controlling the corresponding lower lifting column 401 to extend, so that the second welding block 310 of the second welding part 307 and the lower welding part 402 jointly weld one side of the nursing bag 8; so can not only be applicable to the welding to different thickness nursing package 8, can also weld nursing package 8 opposite side in the evacuation of suction nozzle 501, prevent that outside air from entering into in the nursing package 8.

And S5, controlling an external air extractor, and vacuumizing the nursing packet 8 through the air extracting nozzle 501 so as to further extract air in the nursing packet 8 and improve the vacuum degree in the nursing packet 8.

S6, while controlling the third telescopic column 502 to drive the air suction nozzle 501 to withdraw from the nursing bag 8, controlling the lifting mechanism 6 to drive the first compression spring 302 to be compressed again through the fixing plate 301 and drive the extrusion plate 303 to move downwards to a second height, compressing the second compression spring 309, and welding the side part of the nursing bag 8 inserted into the air suction nozzle 501 with the fixing welding part 308 and the lower welding part 402 so as to improve the integrity of the integral welding of the nursing bag 8.

S7, after welding of the two sides of the nursing packet 8 is completed, the extrusion plate 303 is kept at a second height, the first electric control valve is controlled to be opened, and the second electric control valve is controlled to be closed; the third telescopic column 502 is controlled to drive the suction nozzle 501 to be inserted into the vent hole 3011, so as to prepare for discharging impurities such as cotton fibers filtered by the filter screen inside the suction nozzle 501.

S8, the lifting mechanism 6 is controlled to drive the fixing plate 301 to move upwards, the fixing plate 301 drives the air suction nozzle 501 to move upwards synchronously, meanwhile, the first compression spring 302 recovers elastic deformation, the volume of the cavity in the fixing plate 301 is increased, negative pressure is formed, and sundries on the filter screen in the air suction nozzle 501 are sucked into the fixing plate 301 and stored temporarily.

And S9, in the process of controlling the lifting mechanism 6 to move downwards again, the first electric control valve is controlled to be opened, the second electric control valve is controlled to be closed, the volume of the cavity in the fixing plate 301 is reduced, sundries stored in the cavity are discharged into the external collecting mechanism through the second channel 3013, and discharging and collecting of the sundries are completed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. A disposable sterile vacuum packaging device for a puerperal nursing bag comprises an operation table, and is characterized in that a conveying belt is arranged on the operation table, an upper packaging mechanism is arranged above the conveying belt, lower packaging mechanisms are arranged on two sides of the conveying belt, and an air exhaust mechanism is arranged on one side of one lower packaging mechanism;

the upper packaging mechanism comprises a fixed plate with a cavity structure inside, the fixed plate is connected with the lifting mechanism above the fixed plate, the fixed plate is connected with an extrusion plate through a first compression spring, a sealing part is arranged on the periphery of the extrusion plate, and the extrusion plate can perform up-and-down sealing sliding motion in the cavity of the fixed plate through the sealing part; a vent hole is formed in one side of the fixing plate and communicated with a cavity in the fixing plate through a first channel, and a first electric control valve is arranged in the first channel; the cavity in the fixed plate is communicated with an external collecting mechanism through a second channel, and a second electric control valve is arranged in the second channel;

the upper packaging mechanism comprises a first sealing part and a second sealing part which are respectively arranged on two sides of the lower part of the extrusion plate, and the first sealing part comprises a first telescopic column and a first welding block; the second sealing part comprises a second telescopic column, the second telescopic column is connected with a second welding part, the second welding part comprises a fixed welding part, cavities are formed in two sides of the second welding part, a second compression spring is arranged in each cavity, and the second compression spring is connected with a second welding block;

the lower packaging mechanism comprises lower lifting columns with the same structure, and lower welding parts are arranged on the lower lifting columns; the lower welding part at one side corresponds to the first welding block, and the lower welding part at the other side corresponds to the fixed welding part and the second welding block;

the air extracting mechanism comprises an air extracting nozzle, a filter screen is arranged in the air extracting nozzle, the air extracting nozzle is connected with an external air extractor through a pipeline, the bottom of the air extracting nozzle is connected with the base in a sliding mode through a third telescopic column, and the base is fixed on the operating table;

the lifting mechanism compresses the first compression spring through the fixing plate and drives the extrusion plate to move downwards to a first height, and after the multi-layer nursing pads in the nursing bag above the conveying belt are extruded to remove air in gaps among the multi-layer nursing pads, the nursing bag is subjected to air extraction by the air extraction nozzle, and the nursing bag is welded by the upper packaging mechanism and the lower packaging mechanism at the same time; the lifting mechanism compresses the first compression spring again through the fixing plate and drives the extrusion plate to move downwards to a second height, the second compression spring is compressed, and the suction nozzle extends into the vent hole while the fixed welding part performs secondary welding on the nursing bag; and in the process that the lifting mechanism drives the fixing plate to move upwards, impurities filtered in the air suction nozzle are sucked into the cavity of the fixing plate.

2. The vacuum packaging device of claim 1, wherein the vacuum packaging device comprises: when the lifting mechanism drives the fixing plate to move downwards, the first electric control valve is closed, and the second electric control valve is opened; when the lifting mechanism drives the fixing plate to move upwards, the first electric control valve is opened, and the second electric control valve is closed.

3. The vacuum packaging device of claim 1, wherein the vacuum packaging device comprises: when the pressing plate moves to a second height and the second compression spring is compressed, the lower surface of the fixed welding part is equal to the lower surface of the second welding block in height.

4. The vacuum packaging device of claim 1, wherein the vacuum packaging device comprises: the stiffness coefficient of the second compression spring is greater than the progression coefficient of the first compression spring.

5. The vacuum packaging device of claim 1, wherein the vacuum packaging device comprises: the end of the air suction nozzle is conical, the diameter of the vent hole is larger than that of the front end of the air suction nozzle, and a flexible sealing gasket is arranged in the vent hole.

6. The vacuum packaging device of claim 1, wherein the vacuum packaging device comprises: and when the fixing plate is positioned at the second height, the height of the vent hole is equal to that of the suction nozzle.

7. The vacuum packaging device of claim 1, wherein the vacuum packaging device comprises: the base is provided with a sliding groove, the end part of the third telescopic column is provided with a sliding block, and the sliding block slides in the sliding groove.

8. The vacuum packaging device of claim 7, wherein the vacuum packaging device comprises: after the sliding block moves upwards in the sliding groove, the air suction nozzle withdraws from the vent hole, and the third telescopic column drives the sliding block to move downwards in the sliding groove to the initial position.

9. A method for vacuum packaging a disposable sterile maternal care bag, said method for packaging a disposable sterile maternal care bag vacuum packaging device according to claim 8, wherein said method comprises the steps of: the method comprises the following steps:

s1, controlling the conveyor belt to convey a nursing packet to be packaged to the position right below the upper packaging mechanism; controlling the first electric control valve to be closed and the second electric control valve to be opened;

s2, enabling the lifting mechanism to compress a first compression spring through a fixing plate and drive a squeezing plate to move downwards to a first height, and squeezing the to-be-packaged nursing packet by the squeezing plate so as to remove air in gaps among a plurality of layers of nursing pads in the nursing packet and air in the nursing pads;

s3, controlling the first telescopic column of the first sealing part to extend, and simultaneously controlling the corresponding lower lifting column to extend, so that the first welding block and the lower welding part jointly weld one side of the nursing bag;

s4, controlling a third telescopic column to drive a suction nozzle to extend into the other side of the nursing bag; simultaneously controlling the extension of a second telescopic column of the second sealing part and the extension of a corresponding lower lifting column, so that a second welding block of a second welding part and the lower welding part are used for welding one side of the nursing bag together;

s5, controlling an external air pump, and vacuumizing the nursing bag through an air pumping nozzle;

s6, controlling the third telescopic column to drive the air suction nozzle to withdraw from the nursing bag, controlling the lifting mechanism to drive the first compression spring to be compressed again through the fixing plate and drive the extrusion plate to move downwards to a second height, compressing the second compression spring, and welding the side part of the nursing bag inserted into the air suction nozzle by the fixing welding part and the lower welding part;

s7, after welding of the two sides of the nursing packet is completed, the extrusion plate is kept at a second height, the first electric control valve is controlled to be opened, and the second electric control valve is controlled to be closed; controlling the third telescopic column to drive the air exhaust nozzle to be inserted into the vent hole;

s8, controlling a lifting mechanism to drive a fixing plate to move upwards, driving a suction nozzle to move upwards synchronously by the fixing plate, recovering elastic deformation of a first compression spring, increasing the volume of an inner cavity of the fixing plate and forming negative pressure, and sucking sundries on a filter screen in the suction nozzle into the fixing plate and temporarily storing the sundries;

and S9, in the process of controlling the lifting mechanism to move downwards again, controlling the first electric control valve to be opened and the second electric control valve to be closed, reducing the volume of the cavity in the fixed plate, and discharging sundries stored in the cavity into the external collecting mechanism through the second channel to finish discharging and collecting the sundries.

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