CN114061867A - Packaging bag detection device and detection method - Google Patents
Packaging bag detection device and detection method Download PDFInfo
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- CN114061867A CN114061867A CN202111274610.7A CN202111274610A CN114061867A CN 114061867 A CN114061867 A CN 114061867A CN 202111274610 A CN202111274610 A CN 202111274610A CN 114061867 A CN114061867 A CN 114061867A
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 109
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3218—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators for flexible or elastic containers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3281—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators removably mounted in a test cell
- G01M3/329—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators removably mounted in a test cell for verifying the internal pressure of closed containers
Abstract
The invention provides a packaging bag leakage detection device and a packaging bag leakage detection method. The conveying assembly is arranged on the base and used for driving the packaging bag to move from the first side of the base to the second side of the base; the pressure detection assembly is arranged on the base and comprises a first detection part and a second detection part, and when the packaging bag is positioned on the first side and the second side, the first detection part and the second detection part can be used for measuring a first pressure value and a second pressure value in the packaging bag in a distributed manner; the control assembly is electrically connected with the first detection component and the second detection component, and the control assembly compares the first pressure value measured by the first detection component with the second pressure value measured by the second detection component according to the first pressure value measured by the first detection component so as to determine whether the packaging bag leaks. The packaging bag leakage detection device and the packaging bag leakage detection method provided by the embodiment of the invention can improve the detection precision and the detection efficiency.
Description
Technical Field
Embodiments of the present invention relate generally to the field of package inspection, and more particularly, to a package inspection apparatus and method.
Background
At present, flexible packaging parts are commonly used for packaging liquid, gas and solid articles, and relate to the fields of food, medicine, biochemistry, washing and the like, the sealing strength is the protection strength of the flexible packaging parts to contents, and is an important property of the flexible packaging parts, and the sealing strength directly influences the quality guarantee period of the contents, so the sealing strength detection of the packaging parts is very important. At present, no special flexible packaging bag leakage detection equipment exists, manual observation and manual recording are adopted, the detection precision is low, the efficiency is poor, and the detection data is inconvenient and timely fed back.
Therefore, a new device and method for detecting a packaging bag are needed to solve the above-mentioned problems.
Disclosure of Invention
According to the embodiment of the invention, the scheme of the detection device and the detection method for the packaging bag is provided, and the detection precision and the detection efficiency of the packaging bag are improved.
In one aspect of the present invention, a package testing device is provided. The packaging bag detection device comprises a base, a conveying assembly and a pressure detection assembly. The conveying assembly is arranged on the base and used for driving the packaging bag to move from the first side of the base to the second side of the base; the pressure detection assembly is arranged on the base and positioned above the conveying assembly and comprises a first detection part and a second detection part, when the packaging bag is positioned on the first side of the base, the first detection part can detect a first pressure value in the packaging bag, and when the packaging bag is positioned on the second side of the base, the second detection part can detect a second pressure value in the packaging bag; the control assembly is electrically connected with the first detection component and the second detection component, and the control assembly determines whether the packaging bag leaks according to a first pressure value measured by the first detection component or by comparing the first pressure value measured by the first detection component with a second pressure value measured by the second detection component.
According to an aspect of the embodiment of the invention, the conveying assembly comprises a synchronous belt, a shaft pressing mechanism and a conveying belt, the synchronous belt is connected with the base through the shaft pressing mechanism, the conveying belt is arranged below the synchronous belt and is separated from the synchronous belt by a first preset distance, and the separation distance is smaller than the thickness of the packaging bag, so that the synchronous belt can extrude the packaging bag.
According to an aspect of an embodiment of the invention, the first side of the base and the second side of the base are spaced apart from each other.
According to an aspect of the embodiment of the present invention, the pressing shaft mechanism includes a first pressing shaft, a second pressing shaft, and a third pressing shaft, wherein the first pressing shaft and the second pressing shaft are respectively disposed at two ends of the base, the third pressing shaft is disposed between the first pressing shaft and the second pressing shaft, the third pressing shaft is plural and extends in a horizontal direction, the heights of the first pressing shaft and the second pressing shaft are both greater than the height of the third pressing shaft, and in the plural third pressing shafts, two third pressing shafts respectively adjacent to the first pressing shaft and the second pressing shaft are spaced from the first pressing shaft and the second pressing shaft by a second preset distance; and/or the first pressure shaft and the second pressure shaft are movably connected with the base.
According to an aspect of the embodiment of the present invention, each of the first detection part and the second detection part includes a pressure sensor and a sensor fixing seat, the pressure sensor is connected to the sensor fixing seat, the sensor fixing seat is movably connected to the base through a first connection hole which is disposed on the base and extends in a vertical direction, and a relative distance between the pressure sensor and the conveyor belt is adjusted by changing a position of the sensor fixing seat in the first connection hole.
According to an aspect of the embodiment of the present invention, the pressing shaft mechanism further includes a plurality of fourth pressing shafts, and the fourth pressing shafts are distributed around the first detecting member and the second detecting member, respectively; and/or the last item mechanism still includes the fifth last item, the fifth last item through set up on the base and along the second connecting hole of horizontal direction extension with base swing joint, the fifth last item distributes the both sides of base, the outside of fifth last item is provided with the last item adjustment mechanism, last item adjustment mechanism including connect in the connecting seat of base and with the regulation pole that the connecting seat is connected, adjust the pole with connecting seat swing joint, the one end of adjusting the pole with the butt of fifth last item, through adjust the pole change the fifth last item with interval between the connecting seat to adjust the fifth last item is in the position in the second connecting hole, and then change the tensioning degree of hold-in range.
According to an aspect of the embodiment of the invention, the conveyor belt is arranged on the support, and the base is connected with the support in a sliding manner, so that the base can move on the support in a vertical direction.
According to an aspect of the embodiment of the invention, the packaging bag detection device further comprises a remover which is arranged at the rear side of the second detection part and electrically connected with the control assembly, and when the control assembly detects that the packaging bag is air-leaked, the control assembly controls the remover to work so as to remove the air-leaked packaging bag.
In another aspect of the present invention, a method of inspecting a package is provided. The packaging bag detection method comprises the steps that packaging bags are placed on a conveying mechanism, the conveying mechanism is used for driving the packaging bags to move from a first side of a transmission mechanism to a second side of the transmission mechanism, and the first side and the second side are arranged at intervals; and providing a pressure detection mechanism, respectively acquiring a first pressure value of the first side and a second pressure value of the second side by using the pressure detection mechanism, and comparing the first pressure value with the second pressure value according to the first pressure value or by comparing the first pressure value with the second pressure value to determine whether the air leakage occurs in the packaging bag.
According to another aspect of the embodiments of the present invention, in the step of placing the packaging bag on the transfer mechanism for driving the packaging bag to move from the first side of the transmission mechanism to the second side of the transmission mechanism, the transfer mechanism includes a timing belt and a conveyor belt, and the timing belt and the conveyor belt can press the packaging bag during the movement of the packaging bag from the first side of the transmission mechanism to the second side of the transmission mechanism.
According to the packaging bag leakage detection device and the packaging bag leakage detection method provided by the embodiment of the invention, the first detection part can be used for measuring the first pressure value of the packaging bag on the first side of the base, the second detection part can be used for measuring the second pressure value of the packaging bag on the second side of the base, and the control assembly is used for determining whether the packaging bag is air-leaked or not according to the first pressure value or by comparing the first pressure value with the second pressure value, so that the detection precision and the detection efficiency can be improved. The packaging bag leakage detection device provided by the embodiment of the invention has a simple structure, does not need to be used for air suction or air suction in the packaging bag, keeps the integrity of the packaging bag, simplifies the operation process and is beneficial to saving the cost.
It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of any embodiment of the invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
The above and other features, advantages and aspects of various embodiments of the present invention will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:
FIG. 1 illustrates a perspective view of a package leak detection device provided by an embodiment of the present invention;
FIG. 2 is a front view of the package leak detector of FIG. 1;
FIG. 3 is a side view of the package leak detector of FIG. 1;
FIG. 4 illustrates a perspective view of a base of a leak detection device for a package provided in accordance with an embodiment of the present invention;
FIG. 5 illustrates a front view of a base of a leak detection device for packages provided by an embodiment of the present invention;
FIG. 6 illustrates a front view of a first sensing element of a package leak testing device in accordance with an embodiment of the present invention;
FIG. 7 is a numerical graph showing first pressure values and second pressure values for four test trials of normal red bean food packaging bags and perforated red bean food packaging bags;
FIG. 8 is a line graph showing four experimental data for a normal red bean food packaging bag;
FIG. 9 is a line graph showing four experimental data for a perforated red bean food package;
fig. 10 shows a line graph of the difference between the first pressure value and the second pressure value of four test trials of a normal red bean food packaging bag and a perforated red bean food packaging bag.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 6 is:
10, a base;
20 conveying components, 21 synchronous belts, 22 conveying belts, 23 first pressing shafts, 24 second pressing shafts, 25 third pressing shafts, 26 fourth pressing shafts, 27 fifth pressing shafts, 28 connecting seats and 29 adjusting rods;
30 pressure detection components, 31 a first detection part, 311 a pressure sensor, 312 a sensor fixing seat and 32 a second detection part;
40 a control assembly;
50 bracket.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
A leak detector for a packaging bag according to an embodiment of the present invention will be described with reference to fig. 1 to 10.
As shown in fig. 1 to 5, the leakage detecting device for a packing bag according to the embodiment of the first aspect of the present invention includes a base 10, a transferring unit 20, a pressure detecting unit 30, and a control unit 40.
Specifically, the transfer assembly 20 is disposed on the base 10 for driving the packages to move from the first side of the base 10 to the second side of the base 10. The pressure detecting assembly 30 is disposed on the base 10 and above the conveying assembly 20, and includes a first detecting part 31 and a second detecting part 32, when the packing bag is located on the first side of the base 10, the first detecting part 31 can measure a first pressure value in the packing bag, when the packing bag is located on the second side of the base 10, the second detecting part 32 can measure a second pressure value in the packing bag, and the control assembly 40 is electrically connected to the first detecting part 31 and the second detecting part 32, and the control assembly 40 determines whether the packing bag leaks according to the first pressure value measured by the first detecting part 31 or by comparing the first pressure value measured by the first detecting part 31 with the second pressure value measured by the second detecting part 32.
It should be noted that the base 10 may have a certain width and thickness to ensure that the base 10 has certain strength. The structure of the first detecting member 31 and the second detecting member 32 is not particularly limited in the embodiment of the present invention, as long as the pressure value inside the bag of the packing bag can be measured. Optionally, the first detecting part 31 and the second detecting part 32 may be at two symmetrical portions of the central axis of the base 10, so that the packaging bags have the same detection environment when passing through the first detecting part 31 and the second detecting part 32, thereby avoiding detection errors caused by different detection environments and improving detection precision.
According to the packaging bag leakage detection device provided by the embodiment of the invention, the first detection part 31 can detect the first pressure value of the packaging bag on the first side of the base 10, the second detection part 32 can detect the second pressure value of the packaging bag on the second side of the base 10, and the control assembly 40 determines whether the packaging bag is leaked according to the first pressure value or by comparing the first pressure value with the second pressure value, so that the detection precision and the detection efficiency can be improved. The packaging bag leakage detection device provided by the embodiment of the invention has a simple structure, does not need to be used for air suction or air suction in the packaging bag, keeps the integrity of the packaging bag, simplifies the operation process and is beneficial to saving the cost.
In some embodiments, the conveying assembly 20 includes a timing belt 21, a pressing shaft mechanism, and a conveying belt 22, the timing belt 21 is connected to the base 10 through the pressing shaft mechanism, and the conveying belt 22 is disposed below the timing belt 21 and spaced apart from the timing belt 21 by a first preset distance. The spacing distance is less than the package thickness so that the timing belt 21 can press the package. The timing belt 21 may include a belt and a motor for driving the belt. The conveyor belt 22 is connected with the packaging equipment, and conveys the finished packaging bag products produced by the packaging equipment to the leakage detection device for detection. The conveying mechanism consisting of the synchronous belt 21 and the conveying belt 22 has high conveying efficiency, low cost and simple processing.
In these embodiments, the packaging bag moves from the first side of the base 10 to the second side of the base 10 under the combined action of the timing belt 21 and the conveyor belt 22, so that the transmission efficiency can be improved, and the packaging bag is prevented from slipping on the conveyor belt 22. The preset distance between the timing belt 21 and the conveyor belt 22 may be determined according to the thickness size of the packing bag, for example, the thickness of the packing bag is 30mm, and the preset distance between the timing belt 21 and the conveyor belt 22 may be set to 25mm to enable the packing bag to be squeezed.
It can be understood that hold-in range 21 extrudees the wrapping bag, can make the wrapping bag that has the gas leakage remove the gas outgoing in the bag when base 10 first side moves to base 10 second side, thereby make the second pressure value obviously be less than first pressure value, and if the wrapping bag moves from base 10 first side to the second side, the wrapping bag does not receive the extrusion, then first pressure value and the second pressure value difference of the wrapping bag that has the gas leakage are not obvious, can't the accurate detection wrapping bag whether gas leakage, therefore, when the wrapping bag removed to the second side from base 10 first side, extrude the wrapping bag through hold-in range 21, can improve and detect the precision.
In some embodiments, the first side of the base 10 is spaced apart from the second side of the base 10 by a distance, which may be set between 20-200 cm. It can be understood that, through the spacing distance that increases the first side of base 10 and the second side of base 10, even the wrapping bag has the stroke of certain distance, can make the wrapping bag that exists gas leakage remove to the in-process of base 10 second side from the first side of base 10, hold-in range 21 can fully extrude the wrapping bag, with the gas outgoing in the bag, thereby can make the second pressure value obviously be less than first pressure value, and if the stroke is shorter, the unable fully extruded wrapping bag of hold-in range 21, the first pressure value and the second pressure value difference of the wrapping bag that exists gas leakage are not obvious, can't accurately detect whether gas leakage in the wrapping bag, therefore, through the spacing distance that increases the first side of base 10 and the second side of base 10, can improve and detect the precision.
In some embodiments, the pressing shaft mechanism includes a first pressing shaft 23, a second pressing shaft 24, and a third pressing shaft 25, wherein the first pressing shaft 23 and the second pressing shaft 24 are respectively disposed at both ends of the base 10, the third pressing shaft 25 is disposed between the first pressing shaft 23 and the second pressing shaft 24, the third pressing shaft 25 is plural and extends in a horizontal direction, the heights of the first pressing shaft 23 and the second pressing shaft 24 are both greater than the height of the third pressing shaft 25, and among the plural third pressing shafts 25, two third pressing shafts 25 adjacent to the first pressing shaft 23 and the second pressing shaft 24, respectively, are spaced apart from the first pressing shaft 23 and the second pressing shaft 24 by a second preset distance.
In these embodiments, the number of the third pressing shafts 25 is set to be plural, so that the packages can be maintained in relative movement while being moved on the conveyor 22 without sliding due to other external force factors, and the packages can be pressed. Alternatively, the diameter of the third pressing shaft 25 may be significantly smaller than the diameter of the first pressing shaft 23 and the second pressing shaft 24, and the distance between the adjacent third pressing shafts 25 may be set to be 1-3mm, so that the pressing force applied to the packaging bag during the transfer process is more uniform.
In addition, by making the heights of the first pressing shaft 23 and the second pressing shaft 24 greater than the height of the third pressing shaft 25 and making the first pressing shaft 23 and the second pressing force spaced from the respective adjacent third pressing force by a certain distance, i.e., the timing belt 21 is not completely parallel to the conveyor belt 22 at the entrance, the packaging bag is prevented from being caught between the timing belt 21 and the conveyor belt 22 before the first detection part 31 contacts even if the packaging bag is not completely parallel to the conveyor belt 22, i.e., there is a situation of being tilted or curled, thereby enabling the packaging bag to continue moving smoothly through the conveyor belt 22 and preventing the packaging bag from deviating during the extrusion process.
In some embodiments, the first pressing shaft 23 and the second pressing shaft 24 are movably connected to the base 10, so that the height of the entrance/exit of the timing belt 21 can be adjusted by a small amount, and the timing belt is convenient for different types of packaging bags.
In these embodiments, the connection position of the base 10 and the first pressing shaft 23 and the second pressing shaft 24 may be provided with a vertical through hole, the first pressing shaft 23 and the second pressing shaft 24 may be mounted on the through hole through screws, and the height of the first pressing shaft 23 and the height of the second pressing shaft 24 may be changed by adjusting the relative position of the screws and the through holes.
In some embodiments, as shown in fig. 6, each of the first detecting member 31 and the second detecting member 32 includes a pressure sensor 311 and a sensor fixing seat 312, the pressure sensor 311 is connected to the sensor fixing seat 312, the sensor fixing seat 312 is movably connected to the base 10 through a first connection hole which is disposed on the base 10 and extends in a vertical direction, and a relative distance between the pressure sensor 311 and the conveyor belt is adjusted by changing a position of the sensor fixing seat 312 in the first connection hole, so that both the probes of the two pressure sensors 311 can contact the package bag, and the probes of the two pressure sensors 311 can be prevented from violently squeezing the package bag to cause scratches. In addition, the probe positions of the two pressure sensors 311 can be rounded, and the rounded angles at the two sides keep the same angle, so that the extrusion deformation of the probes of the two pressure sensors 311 is completely consistent, and the influence of environmental variables on the sensors is eliminated.
It will be appreciated that the third presser shaft 25, which is arranged in the horizontal direction, has two openings therein, from which the probes of the two sensors protrude respectively, so as to be able to make contact with the packages.
In these embodiments, a vertical through hole may be provided at the connection position of the base 10 and the sensor fixing seat 312, the sensor fixing seat 312 may be mounted on the through hole by a screw, and the height of the pressure sensor 311 is changed by adjusting the relative position of the screw and the through hole.
In some embodiments, the pressing shaft mechanism further includes a fourth pressing shaft 26, the number of the fourth pressing shaft 26 is plural, and the fourth pressing shaft 26 is distributed around the first detection member 31 and the second detection member 32, respectively, and the timing belt 21 is wound around the fourth pressing shaft 26 to enable the timing belt 21 to bypass the first detection member 31 and the second detection member 32, and provide a space for the pressure sensor 311.
In these embodiments, taking the fourth pressing shafts 26 around the first detecting member 31 as an example, three fourth pressing shafts 26 around the first detecting member 31 may be provided, wherein two fourth pressing shafts 26 are disposed above the third pressing shaft 25 and are arranged in the vertical direction, the other fourth pressing shaft 26 and the higher one of the two vertically arranged fourth pressing shafts 26 are arranged in the horizontal direction, and the fourth pressing shaft 26 is disposed closer to the second detecting member 32 than the first detecting member 31 so as to pass through a certain space for the first detecting member 31, so as to conveniently adjust the height of the pressure sensor 311.
When the tension of the timing belt 21 is insufficient, the timing belt 21 tends to slip. When the tension of the timing belt 21 is too large, the timing belt 21 easily damages bearings of various auxiliary machines. Therefore, in order to improve the conveyance efficiency of the timing belt 21, the tension of the timing belt 21 should be adjusted to an optimum state.
In some embodiments, the pressing shaft mechanism further includes a fifth pressing shaft 27, the fifth pressing shaft 27 is distributed on both sides of the base 10, the timing belt 21 is wound on the outside of the fifth pressing shaft 27, and the fifth pressing shaft 27 is movably connected to the base 10, so that the tension of the timing belt 21 can be adjusted by the fifth pressing shaft 27, thereby adjusting the tension of the timing belt 21 to an optimal state. Optionally, a second connection hole extending in the horizontal direction may be formed at a position where the fifth pressure shaft 27 is connected to the base 10, and the fifth pressure shaft 27 may be movably connected to the second connection hole through a screw, so that the screw adjusts the position of the fifth pressure shaft 27 to change the tension of the synchronous belt 21, thereby adjusting the tension of the synchronous belt 21 to an optimal state. It is of course also possible to adjust the position of the fifth pressure shaft 27 by providing a pressure shaft adjusting mechanism on the outer side of the fifth pressure shaft 27, the pressure shaft adjusting mechanism includes a connecting seat 28 connected to the base 10 and an adjusting rod 29 connected to the connecting seat 28, and the adjusting rod 29 is used to change the distance between the fifth pressure shaft 27 and the connecting seat 28, and thus the tension of the synchronous belt 21. The adjusting rod 29 and the connecting base 28 can be fixed by a locking member such as a screw.
In some embodiments, the leakage detection device for the packaging bag further comprises a support 50, the conveyor belt 22 is arranged on the support 50, the base 10 is slidably connected with the support 50, so that the base 10 can move on the support 50 in the vertical direction, and the distance between the conveyor belt 22 and the synchronous belt 21 is changed by adjusting the base 10, so that the leakage detection device is convenient to adapt to different types of packaging bags.
In such embodiments, the support 50 may be provided with a plurality of support legs, and the support 50 may take various forms, such as a hollow or solid cylindrical structure with a circular, oval or polygonal cross-section. In order to ensure the strength of the bracket 50 and reduce the weight thereof, the bracket 50 may be made of a profile having a hollow cavity in the middle. The control assembly 40 may be disposed on the support 50, and the control assembly 40 may further include an input device, such as a human interface, to control components such as a PLC controller.
In these embodiments, the base 10 may be provided with sliding blocks on both sides thereof, and the bracket 50 may be provided with guide rails on both sides thereof, the sliding blocks being connected to the guide rails so as to slidably connect the base 10 and the bracket 50. In addition, the base 10 can be slid on the bracket 50 by a gear rack or a lead screw nut. For example, a rack extending in a vertical direction may be provided on the base 10, a gear engaged with the rack may be provided on the stand 50, and the base 10 may be slid on the stand 50 by rotating the gear.
In some embodiments, the leakage detecting device for the packaging bag according to the embodiments of the present invention further includes a remover disposed at the rear side of the second detecting member 32 and electrically connected to the control assembly 40, and when the control assembly 40 detects the leakage of the packaging bag, the remover is controlled to operate to remove the leaked packaging bag. Specifically, when the control component 40 detects that the difference value between the first pressure value and the second pressure value is larger or the first pressure value is significantly lower according to the first detection component 31 and the second detection component 32, the control component 40 transmits a signal to the remover to control the remover to work, the remover removes the air-leaking packaging bags, and unqualified products are prevented from being mixed into qualified products.
In addition, the control assembly 40 can also be connected with an alarm, when the control assembly 40 detects that the difference value between the first pressure value and the second pressure value is larger or the first pressure value is obviously lower according to the first detection part 31 and the second detection part 32, the control assembly 40 transmits a signal to the alarm to control the alarm to work, and a producer is reminded that the packaging bag has air leakage.
As shown in fig. 7 to 10, four test experiments were performed using the normal red bean food packaging bag and the perforated red bean food packaging bag, and the first pressure value, the second pressure value and the difference value were recorded, and the difference between the two difference values was compared. And can use the difference to be equal to 3200pa as the demarcation point, when the difference of the first pressure value of wrapping bag and second pressure value is greater than 3200pa, then indicate that the wrapping bag exists the gas leakage, and the product is unqualified. When the difference value between the first pressure value and the second pressure value of the packaging bag is smaller than 3200pa, the packaging bag is not air-leaked, and the product is qualified. From fig. 10, it can be seen that the difference of the four test experiments of the normal red bean food packaging bag is less than 3200pa, i.e. no air leakage, while the difference of the four test experiments of the perforated red bean food packaging bag is more than 3200pa, i.e. air leakage.
On the other hand, the embodiment of the invention also provides a method for detecting the leakage of the packaging bag, which comprises the following steps:
s101, placing the packaging bag on a conveying mechanism, wherein the conveying mechanism is used for driving the packaging bag to move from a first side of a transmission mechanism to a second side of the transmission mechanism, and the first side and the second side are arranged at intervals.
S102, providing a pressure detection mechanism, respectively obtaining a first pressure value of the packaging bag on the first side and a second pressure value of the packaging bag on the second side by using the pressure detection mechanism, and determining whether the packaging bag leaks according to the first pressure value or by comparing the first pressure value with the second pressure value.
In the S101 step, transport mechanism can include conveyer belt and hold-in range, and interval between conveyer belt and the hold-in range is less than the thickness of wrapping bag, so that the wrapping bag removes the in-process to transport mechanism ' S second side from transport mechanism ' S first side, conveyer belt and hold-in range can extrude the wrapping bag, can make the wrapping bag that has gas leakage in extrusion process, the gas in the wrapping bag is discharged, when the wrapping bag is located transport mechanism ' S second side, the second pressure value that can make pressure measurement mechanism survey is obviously less than first pressure value, thereby improve the test accuracy.
In step S102, specifically, according to the first pressure value or by comparing the first pressure value with the second pressure value, if the first pressure value is significantly too low or the difference between the first pressure value and the second pressure value is significantly large, it is determined that the packaging bag has an air leak. If the first pressure value is normal or the difference between the first pressure value and the second pressure value is not large or does not exist, the packaging bag is indicated to be free of air leakage. The above process may be performed by a control component such as a controller.
According to the packaging bag leakage detection method provided by the embodiment of the invention, the pressure detection mechanism can measure the first pressure value of the packaging bag at the first side of the conveying mechanism and the second pressure value of the packaging bag at the second side, and whether the packaging bag is air-leaked or not is determined according to the first pressure value or by comparing the first pressure value with the second pressure value, so that the detection precision and the detection efficiency can be improved. The method for detecting the leakage of the packaging bag is simple in process, does not need air suction or air suction in the packaging bag, keeps the integrity of the packaging bag, simplifies the operation process and is beneficial to saving the cost.
It can be understood that drive mechanism's first side and second side interval set up to make the wrapping bag have certain stroke, so that the wrapping bag removes the in-process to drive mechanism's second side from drive mechanism's first side, conveyer belt and hold-in range can fully extrude the wrapping bag, make the gas in the wrapping bag that has the gas leakage discharge at the extrusion in-process, when the wrapping bag was located drive mechanism's second side, can make the second pressure value that pressure measurement mechanism surveyed obviously be less than first pressure value, thereby improve the measuring accuracy. And if drive mechanism's first side and second side do not have the interval or the interval is less, conveyer belt and hold-in range can't fully extrude the wrapping bag, and when the wrapping bag was located drive mechanism's second side, the second pressure value that pressure measurement mechanism surveyed differed with being less than first pressure value by a little, just also can't accurate detection gas leakage wrapping bag.
In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a wrapping bag device that leaks hunting which characterized in that includes:
a base;
the conveying assembly is arranged on the base and used for driving the packaging bag to move from the first side of the base to the second side of the base;
the pressure detection assembly is arranged on the base and positioned above the conveying assembly, and comprises a first detection part and a second detection part, when the packaging bag is positioned on the first side of the base, the first detection part can detect a first pressure value in the packaging bag, and when the packaging bag is positioned on the second side of the base, the second detection part can detect a second pressure value in the packaging bag;
and the control assembly is electrically connected with the first detection component and the second detection component, and the control assembly determines whether the packaging bag leaks according to a first pressure value measured by the first detection component or by comparing the first pressure value measured by the first detection component with a second pressure value measured by the second detection component.
2. The packaging bag leakage detection device according to claim 1, wherein the conveying assembly comprises a synchronous belt, a shaft pressing mechanism and a conveying belt, the synchronous belt is connected with the base through the shaft pressing mechanism, the conveying belt is arranged below the synchronous belt and is spaced from the synchronous belt by a first preset distance, and the spacing distance is smaller than the thickness of the packaging bag, so that the synchronous belt can extrude the packaging bag.
3. The package leak detection device of claim 1, wherein the first side of the base is spaced from the second side of the base.
4. The package bag leakage detection device according to claim 2, wherein the pressing shaft mechanism includes a first pressing shaft, a second pressing shaft and a third pressing shaft, wherein the first pressing shaft and the second pressing shaft are respectively disposed at both ends of the base, the third pressing shaft is disposed between the first pressing shaft and the second pressing shaft, the third pressing shaft is plural and extends in a horizontal direction, the heights of the first pressing shaft and the second pressing shaft are both greater than the height of the third pressing shaft, and two third pressing shafts adjacent to the first pressing shaft and the second pressing shaft, respectively, among the plural third pressing shafts are spaced from the first pressing shaft and the second pressing shaft by a second predetermined distance; and/or
The first pressing shaft and the second pressing shaft are movably connected with the base.
5. The apparatus of claim 1, wherein the first and second detecting members each comprise a pressure sensor and a sensor holder, the pressure sensor is connected to the sensor holder, the sensor holder is movably connected to the base through a first connecting hole formed in the base and extending in a vertical direction, and a relative distance between the pressure sensor and the conveyor belt is adjusted by changing a position of the sensor holder in the first connecting hole.
6. The package bag leakage detecting device according to claim 2, wherein the pressing shaft mechanism further comprises a plurality of fourth pressing shafts, and the fourth pressing shafts are distributed around the first detecting member and the second detecting member, respectively; and/or
The pressing shaft mechanism further comprises a fifth pressing shaft, the fifth pressing shaft is arranged on the base and movably connected with the base along a second connecting hole extending in the horizontal direction, the fifth pressing shaft is distributed on two sides of the base, a pressing shaft adjusting mechanism is arranged on the outer side of the fifth pressing shaft and comprises a connecting seat connected with the base and an adjusting rod connected with the connecting seat, the adjusting rod is movably connected with the connecting seat, one end of the adjusting rod is abutted to the fifth pressing shaft, and the distance between the fifth pressing shaft and the connecting seat is changed through the adjusting rod so as to adjust the position of the fifth pressing shaft in the second connecting hole and further change the tensioning degree of the synchronous belt.
7. The package bag leakage detection device of claim 1, further comprising a support, wherein the conveyor is disposed on the support, and the base is slidably coupled to the support such that the base is vertically movable on the support.
8. The apparatus according to claim 1, further comprising a remover disposed at a rear side of the second detecting member and electrically connected to the control unit, wherein the control unit controls the remover to operate to remove the air-leaking package when detecting the air-leaking package.
9. A method for detecting leakage of a packaging bag is characterized by comprising the following steps:
placing the packaging bag on a conveying mechanism, wherein the conveying mechanism is used for driving the packaging bag to move from a first side of a transmission mechanism to a second side of the transmission mechanism, and the first side and the second side are arranged at intervals;
and providing a pressure detection mechanism, respectively acquiring a first pressure value of the first side and a second pressure value of the second side by using the pressure detection mechanism, and comparing the first pressure value with the second pressure value according to the first pressure value or by comparing the first pressure value with the second pressure value to determine whether the air leakage occurs in the packaging bag.
10. The method of claim 9, wherein the step of placing the bag on a conveyor for moving the bag from the first side of the drive mechanism to the second side of the drive mechanism comprises a timing belt and a conveyor belt, wherein the timing belt and the conveyor belt are capable of squeezing the bag during the step of moving the bag from the first side of the drive mechanism to the second side of the drive mechanism.
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