CN219694459U

CN219694459U - Food plastic packaging bag air tightness detection device

Info

Publication number: CN219694459U
Application number: CN202223236531.XU
Authority: CN
Inventors: 李金钹
Original assignee: Hunan Minxing Packaging Material Co ltd
Current assignee: Hunan Minxing Packaging Material Co ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-09-15
Anticipated expiration: 2032-12-01

Abstract

The utility model discloses a food plastic packaging bag air tightness detection device which is provided with a support, wherein a testing device for testing packaging bag air tightness and a leakage point positioning device are arranged on the support, the support is provided with an opening and closing device, the opening and closing device comprises a through groove which is vertically and fixedly arranged on the support, two suction plates are connected in a sliding manner in the through groove, the lower ends of the suction plates penetrate through the support to extend downwards, a negative pressure cavity is arranged on the suction plates, the negative pressure cavity is communicated with an air pump on the support, a plurality of suction holes are formed in the upper ends of side walls, which are close to each other, of the suction plates, the suction holes are communicated with the negative pressure cavity, the opening and closing device further comprises two pressing plates which are arranged above the support, a sealing gasket is fixed on one side, which is close to each other, and a driving device for driving the suction plates and the pressing plates to be close to each other or deviate from each other is arranged on the support.

Description

Food plastic packaging bag air tightness detection device

Technical Field

The utility model relates to the field of air tightness detection, in particular to a food plastic packaging bag air tightness detection device.

Background

The food is usually packaged and sealed by adopting a packaging bag for realizing long-term storage and convenient transportation, which has higher air tightness requirement on plastic bags used for packaging, so that spot check is usually required to be carried out on plastic bags produced in batches to detect the air tightness of the plastic bags.

The existing food plastic bag packaging bag air tightness detection needs to be carried out manually to open the plastic bag, then the plastic bag is pressed into water, then whether bubbles exist or not is observed, the operation steps are complex, the packaging bag is easy to damage during the operation of personnel, and the detection effect is affected.

Disclosure of Invention

In order to solve the problems, the utility model provides a food plastic packaging bag air tightness detection device which comprises a bracket, wherein a testing device for testing packaging bag air tightness and a leakage point positioning device are arranged on the bracket, an opening and closing device is arranged on the bracket, the opening and closing device comprises a through groove which is vertically arranged on the bracket and is in sliding connection with two suction plates, the lower ends of the suction plates penetrate through the bracket to extend downwards, a negative pressure cavity is arranged on the suction plates, the negative pressure cavity is communicated with an air pump on the bracket, a plurality of suction holes are arranged at the upper ends of the side walls, which are mutually close, of the suction plates, the suction holes are communicated with the negative pressure cavity, the opening and closing device further comprises two pressing plates which are arranged above the bracket, a sealing gasket is fixed on one side, which is mutually close to each other, and a driving device for driving the suction plates to be mutually close to or deviate from each other is also arranged on the bracket.

Further, the driving device comprises a driving motor fixed on the support, a first gear is fixed at the output end of the motor, the driving device comprises a first bidirectional threaded rod and a second bidirectional threaded rod which are connected on the support in a rotating way and are parallel to each other, threads of the first bidirectional threaded rod and the second bidirectional threaded rod are opposite in rotation direction, second gears meshed with the first gear are fixed on the threads of the first bidirectional threaded rod and the threads of the two ends of the second bidirectional threaded rod respectively connected with the threads of the suction plate, and threads of the two ends of the second bidirectional threaded rod are connected with the threads of the pressing plate respectively.

Further, the testing device comprises a support plate arranged on the support, an air guide hose is fixed on the support plate, one end of the air guide hose is communicated with an air outlet of the air pump, an air inflation head is fixed at one end of the air guide hose, the air guide hose extends towards the support through the support plate, an air pressure sensor is fixed on the air inflation head, an electromagnetic valve is communicated on the air guide hose, and the electromagnetic valve is fixed with the support plate.

Further, a vertical chute is formed in the support, the support plate can slide in the chute, the support plate is formed by processing magnetic materials, a spring is fixed between the top of the support plate and the top plate, and an electromagnet is fixed at the bottom of the top plate.

Further, the leakage point positioning device comprises a plurality of arc plates which are fixed on two sides of a connecting line of the two suction plates, a plurality of water spraying heads are fixed on the arc plates at equal intervals in the vertical direction, the water spraying heads are communicated with a water tank below the support through a water pipe, the water tank is fixed with the support, a plurality of through holes communicated with the water tank are formed in the support, soap liquid is contained in the water tank, a water pump is arranged at one end, close to the water tank, of the water pipe, and a regulating valve is arranged at the water outlet end of the water pump.

Further, the sealing gasket is made of rubber, a semicircular groove is formed in the sealing gasket, and the semicircular groove is matched with the shape of the air guide hose.

The utility model has the following beneficial effects:

1. the device adopts a single motor to drive the suction plate and the pressing plate in the opening and closing device to do opposite and separation movement, so that the automatic opening and closing of the plastic packaging bag are realized, the contact between operators and the plastic packaging bag is reduced, and the risk of damaging the plastic packaging bag is reduced.

2. The device can rapidly and accurately detect the air pressure change inside the plastic packaging bag through the pressure sensor, so that whether the air tightness of the plastic packaging bag is good or not can be accurately detected, the device is further provided with the positioning device for positioning the leakage point of the plastic packaging bag, and the air tightness detection device for rapidly and efficiently positioning the packaging bag at the leakage position is more convenient to observe through generating air bubbles on the surface of the plastic packaging bag.

Drawings

FIG. 1 is a schematic view of the internal structure of the present utility model;

fig. 2 is an enlarged schematic view of the structure at a in fig. 1.

The reference numerals are explained as follows: 1. a bracket; 2. a suction plate; 3. a negative pressure chamber; 4. an air pump; 5. a pressing plate; 6. a sealing gasket; 7. a driving motor; 8. a first gear; 9. a first bi-directional threaded rod; 10. a second bi-directional threaded rod; 11. a second gear; 12. a support plate; 13. an air guide hose; 14. an inflation head; 15. an air pressure sensor; 16. an electromagnetic valve; 17. a spring; 18. an arc-shaped plate; 19. a water spray head; 20. a water tank; 21. a water pump; 22. a regulating valve; 23. an electromagnet; 24. a water pipe.

Detailed Description

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying positive importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model is further described below with reference to the accompanying drawings:

as shown in fig. 1 and 2, a device for detecting the air tightness of a plastic packaging bag comprises a bracket 1, wherein a testing device for testing the air tightness of the packaging bag and a leakage point positioning device are arranged on the bracket 1, an opening and closing device is arranged on the bracket 1, a top plate is arranged above the bracket 1, an air pump 4 is fixed on the top plate, a driving device comprises a driving motor 7 fixed on the bracket 1, a first gear 8 is fixed at the output end of the driving motor 7, the opening and closing device comprises a through groove vertically penetrating the bracket 1, two suction plates 2 are connected on the through groove of the bracket 1 in a sliding manner, the lower end of each suction plate 2 can downwards extend through the through groove on the bracket 1, a negative pressure cavity is arranged on each suction plate 2, a plurality of suction holes are formed at the upper ends of side walls of the suction plates 2, which are close to each other, the suction holes are communicated with the negative pressure cavity on the suction plates 2, the negative pressure cavity on the suction plates are communicated with an air suction port of the air pump 4, the air pump 4 can suck air to form negative pressure in the negative pressure cavity 3, a suction hole on the negative pressure cavity 3 can absorb one side of a plastic packaging bag, a plurality of arc plates 18 are fixed on two sides of a connecting line of the two suction plates 2 of the bracket 1, the leakage point positioning device comprises the arc plates 18, a plurality of water spray heads 19 are uniformly fixed on the arc plates 18 at intervals, the water spray heads 19 are communicated with a water tank 20 below the bracket 1 through a water pipe 24, the water tank 20 is fixed with the bracket 1, a plurality of through holes 20 communicated with the water tank 20 are formed in the bracket 1, soap liquid is contained in the water tank 20, one end of the water pipe 24 close to the water tank 20 is provided with a water pump 21, the water pump 21 is fixed with the bracket 1, the water outlet end of the water pump 21 is provided with a regulating valve 22, the water pump 21 can suck the soap liquid in the water tank 20 and uniformly spray the soap liquid to cover the outer side of the plastic packaging bag through the water spray heads 19, the overspray soap can flow into the water tank 20 for recovery through the through holes of the bracket 1 communicated with the water tank 20.

In this embodiment, a first bidirectional threaded rod 9 is rotatably connected to the bracket 1, threads at two ends of the first bidirectional threaded rod 9 are respectively in threaded connection with the suction plates 2, a second gear 11 is fixed to the first bidirectional threaded rod 9, the second gear 11 is meshed with the first gear 8, the driving motor 7 can drive the first bidirectional threaded rod to rotate through the first gear 8 and the second gear 11 which are meshed with each other, and the bidirectional threaded rod can drive the two suction plates 2 in threaded connection to perform similar or mutually deviating displacement.

In this embodiment, the support 1 is provided with a chute along a vertical direction, the chute is slidably connected with the support 12, the support 12 is formed by processing magnetic materials, a spring 17 is fixed between the top of the support 12 and the support 1, an electromagnet 23 is fixed on the support 1, the electromagnet 23 is electrified to absorb the upward displacement of the support 12 along the chute, the electromagnet 23 is powered off, the spring 17 can drive the support 12 to displace downward along the chute, an air guide hose 13 is fixed on the support 12, the air guide hose 13 can move up and down along the support 12, one end of the air guide hose 13 is communicated with an air outlet of the air pump 4, one end of the air guide hose extends to the support 1 through the support 12 and is fixedly provided with an air charging head 14, an air pressure sensor 15 is fixed on the air charging head 14, an electromagnetic valve 16 is communicated on the air guide hose 13, preferably, the electromagnetic valve 16 is a two-position three-way electromagnetic valve 16 is selected for use, the electromagnetic valve 16 is fixed with the support 12, the support 12 moves downward to drive the air guide hose 13 and the air charging head 14 to move downward and stretch into the plastic packaging bag, the air pump 4 can pump air charge air in the negative pressure cavity into the plastic packaging bag, and the electromagnetic valve 16 can control the flow of air.

In this embodiment, the second bidirectional threaded rod 10 is rotatably connected to the support 1, the second gear 11 is fixed to the second bidirectional threaded rod 10, the second gear 11 is meshed with the first gear 8, the second bidirectional threaded rod 10 is parallel to the first bidirectional threaded rod 9 and has opposite screw threads, the two ends of the second bidirectional threaded rod 10 are respectively connected with the pressing plates 5 in a screw thread manner, the lower ends of the pressing plates 5 vertically extend downwards, the opening and closing device further comprises the pressing plates 5, the sealing gaskets 6 are fixed to one side, close to each other, of the two pressing plates 5, semicircular grooves which are matched with the outer diameter of the air guide hose 13 are formed in the sealing gaskets 6, the driving motor 7 can drive the two pressing plates 5 in screw connection to make similar or deviating displacement with each other through the first gear 8 and the second gear 11, the sealing gaskets 6 on the pressing plates 5 can press the openings of the sealing plastic packaging bags, the semicircular grooves can accommodate and press the positions of the air guide hose 13, and the positions of the plastic packaging bags are prevented from generating air leakage when in detection.

The working principle of the utility model is as follows: the plastic packaging bag to be detected is placed on the support 1, the air pump 4 starts to suck air in the negative pressure cavity and generates negative pressure in the negative pressure cavity, the two suction plates 2 adsorb two sides of the plastic packaging bag respectively, air sucked by the air pump 4 is discharged through the electromagnetic valve 16, the driving motor 7 drives the first bidirectional threaded rod 9 and the second bidirectional threaded rod 10 to rotate, the two suction plates 2 deviate from each other now, the plastic packaging bag is opened, the electromagnet 23 on the support 1 is powered off the spring 17 to push the support plate 12 to move downwards, the air jet head and the air pressure sensor 15 at the end part of the air guide hose 13 move downwards along with the support plate 12 to extend into the plastic packaging bag, the second bidirectional threaded rod 10 rotates to drive the pressing plates 5 to be close to each other, the sealing gasket 6 on the pressing plates 5 pushes the plastic opening to close and clamp the packaging bag, the suction plates 2 continue to deviate from the plastic packaging bag and are separated from the suction plates 2, the electromagnetic valve 16 controls the air guide hose 13 to be communicated with the air outlet of the air pump 4, the air pump 4 can charge air into the packaging bag through the air jet head, and the electromagnetic valve 16 cuts off circulation of air in the air guide hose 13 after the air pressure in the plastic packaging bag is stable. The air tightness of the plastic bag is detected by detecting the air pressure of the plastic bag by the air pressure sensor 15.

When the funnel is required to be positioned, the water pump 21 can be controlled to be started, soap liquid in the water tank 20 can be pumped out by the water pump 21 and evenly sprayed and covered on the outer side of the plastic packaging bag through the water spray head 19, too much sprayed soap liquid can flow into the water tank 20 to be recovered through the through hole communicated with the water tank 20 by the bracket 1, the electromagnetic valve 16 controls the air guide hose 13 to be communicated with the air outlet of the air pump 4, the air pump 4 can be used for filling air into the packaging bag through the air spray head, air bubbles can be generated on the surface of the plastic packaging bag at the leakage point, and detection personnel can observe and determine the funnel conveniently.

After the test is finished, the driving motor 7 can rotate through the first bidirectional threaded rod 9 and the second bidirectional threaded rod 10, the suction plate 2 and the pressing plate 5 are reset, the electromagnet 23 is electrified, and the supporting plate 12 can drive the air guide hose 13 and the air jet head to finish resetting.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.

Claims

1. The utility model provides a food plastic packaging bag gas tightness detection device, includes support (1), its characterized in that: offer testing arrangement and the leak source positioner of test wrapping bag gas tightness on support (1), be provided with headstock gear on support (1), headstock gear includes the vertical logical groove of running through of seting up on support (1), and logical inslot sliding connection has two suction plates (2), and suction plate (2) lower extreme passes support (1) downwardly extending, has seted up negative pressure chamber (3) on suction plate (2), and negative pressure chamber (3) communicate with air pump (4) on support (1), and a plurality of suction openings have been seted up to the lateral wall upper end that suction plate (2) are close to each other, suction opening and negative pressure chamber (3) intercommunication, headstock gear still includes two clamp plates (5) that support (1) top set up, and clamp plate (5) are close to each other one side and are fixed with sealing pad (6), still are provided with the drive suction plate (2), clamp plate (5) and are close to each other or deviate from drive arrangement on support (1).

2. The food plastic packaging bag air tightness detection device according to claim 1, wherein: the driving device comprises a driving motor (7) fixed on a support (1), a first gear (8) is fixed at the output end of the motor, the driving device further comprises a first bidirectional threaded rod (9) and a second bidirectional threaded rod (10) which are connected on the support (1) in a rotating mode and parallel to each other, threads of the first bidirectional threaded rod (9) and the second bidirectional threaded rod (10) are opposite in direction, second gears (11) meshed with the first gear (8) are fixed on threads of the first bidirectional threaded rod (9) and the second bidirectional threaded rod (10), threads at two ends of the first bidirectional threaded rod (9) are connected with threads of a suction plate (2) respectively, and threads at two ends of the second bidirectional threaded rod (10) are connected with threads of a pressing plate (5) respectively.

3. The food plastic packaging bag air tightness detection device according to claim 1, wherein: the testing device comprises a support plate (12) arranged on a support (1), an air guide hose (13) is fixed on the support plate (12), one end of the air guide hose (13) is communicated with an air outlet of an air pump (4), the other end of the air guide hose extends towards the support (1) through the support plate (12) and is fixedly provided with an inflating head (14), an air pressure sensor (15) is fixed on the inflating head (14), an electromagnetic valve (16) is communicated on the air guide hose (13), and the electromagnetic valve (16) is fixed with the support plate (12).

4. The food plastic packaging bag air tightness detection device according to claim 1, wherein: a vertical chute is formed in the support (1), the support plate (12) can slide in the chute, the support plate (12) is formed by processing magnetic materials, a spring (17) is fixed between the top of the support plate (12) and the top plate, and an electromagnet (23) is fixed at the bottom of the top plate.

5. The food plastic packaging bag air tightness detection device according to claim 1, wherein: the leakage point positioning device comprises a support (1), a plurality of arc plates (18) which are fixed on two sides of a connecting line of two suction plates (2), a plurality of water spraying heads (19) are uniformly fixed on the arc plates (18) at intervals, the water spraying heads (19) are communicated with a water tank (20) below the support (1) through a water conveying pipe (24), the water tank (20) is fixed with the support (1), a plurality of through holes which are communicated with the water tank (20) are formed in the support (1), soap liquid is contained in the water tank (20), a water pump (21) is arranged at one end of the water conveying pipe (24) close to the water tank (20), and a regulating valve (22) is arranged at the water outlet end of the water pump (21).

6. A food plastic packaging bag air tightness detection device according to claim 3, characterized in that: the sealing gasket (6) is made of rubber, a semicircular groove is formed in the sealing gasket (6), and the semicircular groove is matched with the shape of the air guide hose (13).