CN214357675U

CN214357675U - Self-sealing bag

Info

Publication number: CN214357675U
Application number: CN202022005671.0U
Authority: CN
Inventors: 龚立锋
Original assignee: Deqing Sunny Plastic Products Co Ltd
Current assignee: Deqing Sunny Plastic Products Co Ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-10-08
Anticipated expiration: 2030-09-14

Abstract

The utility model relates to the technical field of packaging bags, and provides a self-sealing bag which comprises a bag body, wherein an opening part is arranged on the bag body, a first fastening unit and a second fastening unit are respectively arranged at two sides of the opening part, and the first fastening unit and the second fastening unit can be fastened and connected to realize the sealing and the opening of the opening part; the bag body is provided with an air hole unit, so that the air in the bag body can be communicated with the outside air. The utility model provides a self-sealing bag, the bag body is used for packing up the back with article, then connect through first lock joint unit and second lock joint unit lock, be equipped with the gas pocket unit on the bag body, make the internal air of bag can communicate with the outside air, can carry out gas exchange at any time, be favorable to gas outgoing, also be convenient for simultaneously store and transport, make the bag body sealed up the back, can not have the internal situation that leads to the crowded explosion of the bag body because of the phenomenon of blowing, the fresh fruit vegetables of the internal packing of bag also can exchange with the outside air, in order to guarantee to place in the internal fruit vegetables of bag ventilative.

Description

Self-sealing bag

Technical Field

The utility model relates to a wrapping bag technical field especially relates to a valve bag.

Background

People in many occasions in life all need use the valve bag to pack article, for example, can be used for packing food, medicine, components and parts, dress toy, daily storage etc. if valve bag among the prior art need get rid of gas, just need discharge unnecessary gas earlier at the opening of valve bag, then seal up the opening, if unnecessary gas does not get rid of completely, the valve bag can have the phenomenon of bloating, be unfavorable for depositing and transporting, need open the oral area once more and get rid of unnecessary gas, its operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model provides a valve bag to the problem that exists among the prior art for solve the inconvenient technical problem who gets rid of unnecessary gas of valve bag among the prior art.

The utility model discloses technical scheme as to above-mentioned technical problem and propose as follows:

a self-sealing bag comprises a bag body, wherein an opening part is arranged on the bag body, a first fastening unit and a second fastening unit are respectively arranged on two sides of the opening part, and the first fastening unit and the second fastening unit can be fastened and connected to seal and open the opening part;

the bag body is provided with an air hole unit, so that the air in the bag body can be communicated with the outside air.

According to the self-sealing bag, the bag body comprises a first bag part and a second bag part, and the first bag part and the second bag part are oppositely arranged and are of an integrated structure;

the first bag part is provided with a first air hole unit;

or a second air hole unit is arranged on the second bag part;

or the first bag part is provided with a first air hole unit, the second bag part is provided with a second air hole unit, and the first air hole unit and the second air hole unit are correspondingly arranged;

or, the first bag part is provided with a first air hole unit, the second bag part is provided with a second air hole unit, and the first air hole unit and the second air hole unit are arranged in a staggered mode.

According to the self-sealing bag, the air hole unit comprises a plurality of small air holes, the small air holes are distributed in an array mode and are fully distributed on the whole bag body, or the bag body part area is provided with the small air holes, and the distance between the adjacent small air holes is 1-10 mm.

According to the self-sealing bag, one side of the first fastening unit, which is far away from the bag body, is fixedly connected with a first extension part so as to separate the first fastening unit from the second fastening unit;

or a second extending part is arranged on one side, far away from the bag body, of the second fastening unit, so that the first fastening unit and the second fastening unit can be separated conveniently;

or, one side of the bag body, away from the first fastening unit, is fixedly connected with a first extending portion, one side of the bag body, away from the second fastening unit, is provided with a second extending portion, and the first extending portion and the second extending portion are arranged in a staggered manner, so that the first fastening unit and the second fastening unit are separated.

According to the self-sealing bag, the first buckling unit comprises a first reinforced sealing area and a first sealing area, the first sealing area is arranged on one side far away from the bag body, and the first reinforced sealing area is arranged on one side close to the bag body;

the second fastening unit comprises a second reinforced sealing area and a second sealing area, the second sealing area is arranged on one side far away from the bag body, and the second reinforced sealing area is arranged on one side close to the bag body.

According to the self-sealing bag, the first sealing area is a convex part extending towards the second sealing area, the second sealing area is a concave part adaptive to the shape and size of the convex part, and the convex part is arranged in the concave part and connected with the concave part in a pressing fit mode.

According to the self-sealing bag, the convex part comprises an arc-shaped convex rib and a first connecting rib, the first connecting rib is fixedly connected with the bag body, the arc-shaped convex rib and the first connecting rib are of an integrated structure, and the overall dimension of the arc-shaped convex rib is larger than that of the first connecting rib;

the concave part comprises an arc concave part matched with the arc convex rib and a hollow extrusion part matched with the first connecting rib, the arc concave part is fixedly connected with the bag body, the arc concave part and the hollow extrusion part are of an integrated structure, and the inner diameter of the arc concave part is larger than that of the hollow extrusion part.

According to the valve bag, first enhancement sealing area includes a plurality of first fasteners that are the L type, but second enhancement sealing area includes a plurality of second fasteners that are the L type, first fastener with but second fastener lock joint is connected, in order to incite somebody to action first fastening unit and second fastening unit connect.

According to the self-sealing bag, the first fasteners comprise second connecting ribs and first fastening parts, the second connecting ribs are fixedly connected with the bag body, the second connecting ribs and the first fastening parts are of an integrated structure, and the first fastening parts of the first fasteners are arranged in the same direction;

the second fastener includes third splice bar and second knot portion, the third splice bar with bag body fixed connection, the third splice bar with the second is detained a formula structure as an organic whole, and each the second fastener includes the second is detained a syntropy and is set up, and with the opposite direction of the setting of first knot portion, first knot portion with the second is detained a lock and is connected.

According to the self-sealing bag, the first reinforced sealing area further comprises first limiting guide pieces, the number of the first limiting guide pieces corresponds to that of the first fasteners, the first limiting guide pieces are arranged on one side close to the first fastening parts, the cross section of each first limiting guide piece is in a right trapezoid shape, and the oblique side of each right trapezoid forms an obtuse angle with the inner side face of the bag body;

and/or, sealed region is strengthened to the second still including be equipped with the corresponding spacing guide of second fastener quantity, just the spacing guide of second is located be close to one side of second knot portion, just the cross-sectional shape of the spacing guide of second is right trapezoid, and right trapezoid's hypotenuse with the medial surface of the bag body forms the obtuse angle.

According to above-mentioned scheme the utility model discloses, its beneficial effect lies in at least:

the utility model provides a self-sealing bag, the bag body is used for packing up the back with article, then connect through first lock joint unit and second lock joint unit lock, be equipped with the gas pocket unit on the bag body, make the internal air of bag can communicate with the outside air, can carry out gas exchange at any time, be favorable to gas outgoing, also be convenient for simultaneously store and transport, make the bag body sealed up the back, can not have the internal crowded circumstances of exploding of bag body because of the phenomenon of blowing, the fresh fruit vegetables of the internal packing of bag also can exchange with the outside air, in order to guarantee to place the internal fruit vegetables of bag ventilative, thereby it is long when the fresh-keeping of fruit vegetables has been improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of a self-sealing bag according to an embodiment of the present invention;

FIG. 2 is a schematic view of a first bag portion of a self-sealing bag according to an embodiment of the present invention;

FIG. 3 is a schematic view of a second bag portion of the self-sealing bag according to an embodiment of the present invention;

figure 4 is a schematic structural view of a first extension part and a second extension part included in the self-sealing bag provided by the embodiment of the present invention;

figure 5 is the first sealed region of enhancement and the regional structure sketch map of second sealed region of enhancement that valve bag that the embodiment of the utility model provides included.

Wherein, in the figures, the respective reference numerals:

Detailed Description

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

In order to solve the technical problem that the self-sealing bag in the prior art is inconvenient to remove the redundant gas, the utility model aims to provide a self-sealing bag. The core idea is as follows: the self-sealing bag comprises a bag body, wherein an opening part is arranged on the bag body, a first fastening unit and a second fastening unit are respectively arranged on two sides of the opening part, and the first fastening unit and the second fastening unit can be fastened and connected to seal and open the opening part; the bag body is provided with an air hole unit, so that the air in the bag body can be communicated with the outside air. The utility model provides a self-sealing bag, the bag body is used for packing up the back with article, then connect through first lock joint unit and second lock joint unit lock, be equipped with the gas pocket unit on the bag body, make the internal air of bag can communicate with the outside air, can carry out gas exchange at any time, be favorable to gas outgoing, also be convenient for simultaneously store and transport, make the bag body sealed up the back, can not have the internal crowded circumstances of exploding of bag body because of the phenomenon of blowing, the fresh fruit vegetables of the internal packing of bag also can exchange with the outside air, in order to guarantee to place the internal fruit vegetables of bag ventilative, thereby it is long when the fresh-keeping of fruit vegetables has been improved.

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1, the present embodiment provides a self-sealing bag 100, including a bag body 10, an opening 11 is disposed on the bag body 10, a first fastening unit 20 and a second fastening unit 30 are respectively disposed on two sides of the opening 11, and the first fastening unit 20 and the second fastening unit 30 can be fastened and connected to seal and open the opening 11;

the bag body 10 is provided with an air hole unit 12, so that the air in the bag body 10 can be communicated with the outside air.

The self-sealing bag 100 provided by the embodiment has the advantages that:

the embodiment provides a valve bag 100, bag body 10 is used for packing up the back with article, then connect through first lock joint unit 20 and the lock of second lock joint unit 30, be equipped with gas pocket unit 12 on bag body 10, make the air in the bag body 10 can communicate with the outside air, gas exchange can carry out, be favorable to gas outgoing, also be convenient for simultaneously store and transport, make bag body 10 sealed up the back, can not have in the bag body 10 because of the air blowing phenomenon lead to the crowded condition of exploding with bag body 10, the fresh fruit vegetables of the internal package of bag body 10 also can exchange with the outside air, it is ventilative with the fruit vegetables of guaranteeing to place in the bag body 10, thereby it is long when the fresh-keeping of fruit vegetables has been improved.

Referring to fig. 2 and 3, in an embodiment, the bag body 10 includes a first bag portion 13 and a second bag portion 14, the first bag portion 13 and the second bag portion 14 are oppositely disposed and are of an integrated structure, the first bag portion 13 is provided with a first air vent unit 121, one surface of the first bag portion 13 is provided with the first air vent unit 121, and the second bag portion 14 without air vents can be placed against the ground to facilitate water proofing.

In another embodiment, the second air hole unit 122 is disposed on the second bag portion 14, the second air hole unit 122 is disposed on one side of the second bag portion 14, and the first bag portion 13 without air holes can be placed on the ground, so as to be waterproof.

In another embodiment, a first air hole unit 121 is disposed on the first bag portion 13, a second air hole unit 122 is disposed on the second bag portion 14, and the first air hole unit 121 and the second air hole unit 122 are correspondingly disposed. The first vent hole 121 is formed on one surface of the first bag 13, and the second vent hole 122 is formed on one surface of the second bag 14, thereby facilitating the discharge of gas.

In another embodiment, the first bag portion 13 is provided with a first air hole unit 121, the second bag portion 14 is provided with a second air hole unit 122, and the first air hole unit 121 and the second air hole unit 122 are arranged in a staggered manner, so that a path from one side to the other side for air to exit can be prolonged, and further, the time for air to stay in the bag body 10 is prolonged, and the food fresh-keeping effect inside the bag body 10 is better.

In one embodiment, the vent unit 12 includes a plurality of small vents 123, and the plurality of small vents 123 are arranged in an array and are distributed throughout the bag 10, such that the bag 10 can uniformly exchange with the external air.

In another embodiment, the plurality of small air holes 123 are arranged in an array in concentric circles.

In another embodiment, the plurality of small air holes 123 are arranged in a cross shape.

In another embodiment, the pouch body 10 has a plurality of small air holes 123 in a partial region thereof. Optionally, the upper region of the bag body 10 is provided with small air holes 123, and the lower region is not provided with small air holes, or the upper region of the bag body 10 is not provided with small air holes 123, and the lower region is provided with small air holes 123; the upper area and the lower area are partitioned by the isolation connecting part, so that food needing to be sealed and food needing air can be separately placed, and one bag of food has two functions. Alternatively, the structure of the isolation connection portion may be the same as the connection structure of the first fastening unit 20 and the second fastening unit 30 provided at the opening portion, or may be another connection structure, which is not limited herein.

Optionally, the distance between the adjacent small air holes 123 is 1mm to 10 mm.

Optionally, the distance between the adjacent small air holes 123 is 5 mm.

Optionally, the distance between the adjacent small air holes 123 is 4 mm.

Optionally, the small air holes 123 have a hole diameter of 0.1mm to 1 mm.

Optionally, the small air holes 123 have a hole diameter of 0.3 mm.

Optionally, the bag body 10 is made of PE. Because the PE material is softer and has certain hardness, the bottom of the bag body 10 can be folded towards the inside of the bag body 10 to form a supporting area, so that the whole bag body 10 can stand up, and food can be conveniently filled into the bag body 10.

Optionally, the first protruding strip 21 is disposed on the outside of the first fastening unit 20, the second protruding strip 31 is disposed on the outside of the second fastening unit 30, and when the user connects the first fastening unit 20 and the second fastening unit 30 by pressing the first fastening unit 20 and the second fastening unit 30 with hands, the first protruding strip 21 and the second protruding strip 31 facilitate the sliding of fingers, so that the first fastening unit 20 and the second fastening unit 30 can be quickly sealed.

In one embodiment, a first extension 22 is fixedly connected to a side of the first fastening unit 20 away from the bag 10, so as to separate the first fastening unit 20 from the second fastening unit 30; the first extension portion 22 is configured to make the length of the first fastening unit 20 greater than that of the second fastening unit 30, that is, there is a height difference between the edges of the first fastening unit 20 and the second fastening unit 30, so as to facilitate the separation of the first fastening unit 20 and the second fastening unit 30, and facilitate the rapid removal of an object or the insertion of an object.

In another embodiment, a side of the second fastening unit 30 away from the bag 10 is provided with a second extension 32 to facilitate separation of the first fastening unit 20 and the second fastening unit 30. The second extension portion 32 is configured to make the length of the second fastening unit 30 greater than the length of the first fastening unit 20, that is, there is a height difference between the edges of the first fastening unit 20 and the second fastening unit 30, so as to facilitate the separation of the first fastening unit 20 and the second fastening unit 30, and facilitate the rapid removal or insertion of an object.

In another embodiment, a first extending portion 22 is fixedly connected to a side of the first fastening unit 20 away from the bag body 10, a second extending portion 32 is provided on a side of the second fastening unit 30 away from the bag body 10, and the first extending portion 22 and the second extending portion 32 are staggered, so as to separate the first fastening unit 20 and the second fastening unit 30, so as to facilitate quick removal of an object or insertion of an object.

With reference to fig. 1, the first fastening unit 20 includes a first reinforced sealing region 23 and a first sealing region 24, the first sealing region 24 is disposed on a side away from the bag 10, and the first reinforced sealing region 23 is disposed on a side close to the bag 10; the second fastening unit 30 includes a second reinforced sealing region 33 and a second sealing region 34, the second sealing region 34 is disposed at a side far from the bag 10, and the second reinforced sealing region 33 is disposed at a side close to the bag 10. The fastening connection of the first sealing region 24 and the second sealing region 34 and the fastening connection of the first reinforcing sealing region 23 and the second reinforcing sealing region 33 make the sealing connection of the opening 11 of the bag body 10 more secure, so that the article placed in the bag body 10 cannot slip out from the opening 11.

In one embodiment, the first sealing area 24 is a protrusion extending toward the second sealing area 34, and the second sealing area 34 is a recess conforming to the outer dimensions of the protrusion, the protrusion being disposed within and press-fit connected with the recess. The first sealing region 24 and the second sealing region 34 are engaged by the protrusion and the recess to form a snap-fit connection, so that the opening of the bag 10 can be sealed.

In one embodiment, referring to fig. 4, the protruding portion includes an arc-shaped rib 241 and a first connecting rib 242, the first connecting rib 242 is fixedly connected to the bag body 10, the arc-shaped rib 241 and the first connecting rib 242 are of an integral structure, and the outer dimension of the arc-shaped rib 241 is greater than the outer dimension of the first connecting rib 242; the concave portion comprises an arc concave portion 341 matched with the arc convex rib 241 and a hollow extrusion portion 342 matched with the first connecting rib 242, the arc concave portion 341 is fixedly connected with the bag body 10, the arc concave portion 341 and the hollow extrusion portion 342 are of an integral structure, and the inner diameter of the arc concave portion 341 is larger than that of the hollow extrusion portion 342. The process of fastening the first sealing area 24 and the second sealing area 34 is as follows: when external force is applied to the first sealing area 24 and the second sealing area 34, the arc-shaped convex rib 241 extrudes through the hollow extrusion part 342 until the arc-shaped convex rib is connected with the arc-shaped concave part 341 in a matched mode, and meanwhile, the outer wall of the first connecting rib 242 is also connected with the inner wall of the hollow extrusion part 342 in an extruded mode, so that the convex part is connected with the concave part in a matched mode, namely, the first sealing area 24 is connected with the second sealing area 34 in a sealed and buckled mode.

In one embodiment, the first reinforced sealing region 23 includes a plurality of L-shaped first fastening components 231, and the second reinforced sealing region 33 includes a plurality of L-shaped second fastening components 331, wherein the first fastening components 231 and the second fastening components 331 are adapted to be fastened together to connect the first fastening unit 20 and the second fastening unit 30. The plurality of L-shaped first fasteners 231 and the plurality of L-shaped second fasteners 331 are disposed such that the first fastening unit 20 and the second fastening unit 30 are connected more stably, thereby preventing the object in the bag body 10 from slipping out from the opening 11.

Referring to fig. 5, in an embodiment, the first fastening components 231 include second connecting ribs 2311 and first fastening parts 2312, the second connecting ribs 2311 are fixedly connected with the bag body 10, the second connecting ribs 2311 and the first fastening parts 2312 are of an integrated structure, and the first fastening components 2312 included in each first fastening component 231 are arranged in the same direction. The second buckle 331 comprises a third connecting rib 3311 and a second buckle portion 3312, the third connecting rib 3311 is fixedly connected to the bag body 10, the third connecting rib 3311 is integrated with the second buckle portion 3312, each of the second buckle portions 3312 is arranged in the same direction as the second buckle portion 3312, and the first buckle portion 2312 is arranged in the opposite direction to the first buckle portion 2312, and the first buckle portion 2312 is buckled and connected with the second buckle portion 3312. The plurality of first buckling parts 2312 are arranged in the same direction, the plurality of second buckling parts 3312 are arranged in the same direction, and the arrangement direction of the first buckling parts 2312 is opposite to that of the second buckling parts 3312, so that the plurality of first buckling parts 2312 and the plurality of second buckling parts 3312 are matched with each other and are firmly buckled.

In one embodiment, the first reinforced sealing area 23 further includes a first position-limiting guide 232 corresponding to the number of the first fastening components 231, the first position-limiting guide 232 is disposed on the side close to the first fastening component 2312, and the cross-sectional shape of the first position-limiting guide 232 is a right trapezoid, and the oblique side of the right trapezoid forms an obtuse angle with the inner side of the bag 10. And/or, the second reinforced sealing area 33 further includes a second limiting guide part 332 corresponding to the second fasteners 331 in number, the second limiting guide part 332 is disposed on one side of the second fastening part 3312, the cross-sectional shape of the second limiting guide part 332 is a right trapezoid, and the oblique side of the right trapezoid forms an obtuse angle with the inner side of the bag 10. The first position-limiting guide 232 facilitates the first buckle portion 2312 and the second buckle portion 3312 to be buckled and connected, and can also prevent the first buckle portion 2312 and the second buckle portion 3312 from sliding out relatively after being buckled and connected. The second position-limiting guide 332 facilitates guiding the first buckle portion 2312 and the second buckle portion 3312 to be buckled and connected, and further prevents the first buckle portion 2312 and the second buckle portion 3312 from sliding out relatively after buckling and connecting.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A valve bag, its characterized in that: the bag comprises a bag body (10), wherein an opening part (11) is arranged on the bag body (10), a first fastening unit (20) and a second fastening unit (30) are respectively arranged on two sides of the opening part (11), and the first fastening unit (20) and the second fastening unit (30) can be fastened and connected to seal and open the opening part (11);

the bag body (10) is provided with an air hole unit (12) so that air in the bag body (10) can be communicated with external air.

2. The valve bag of claim 1, wherein: the bag body (10) comprises a first bag part (13) and a second bag part (14), and the first bag part (13) and the second bag part (14) are oppositely arranged and are of an integrated structure;

a first air hole unit (121) is arranged on the first bag part (13);

or a second air hole unit (122) is arranged on the second bag part (14);

or, a first air hole unit (121) is arranged on the first bag part (13), a second air hole unit (122) is arranged on the second bag part (14), and the first air hole unit (121) and the second air hole unit (122) are correspondingly arranged;

or, the first bag part (13) is provided with a first air hole unit (121), the second bag part (14) is provided with a second air hole unit (122), and the first air hole unit (121) and the second air hole unit (122) are arranged in a staggered mode.

3. The valve bag of claim 1, wherein: the air hole unit (12) comprises a plurality of small air holes (123), the small air holes (123) are distributed in an array mode and are fully distributed on the whole bag body (10), or the bag body (10) is provided with a plurality of small air holes (123) in a partial area, and the distance between every two adjacent small air holes (123) is 1-10 mm.

4. The valve bag of claim 1, wherein: a first extending part (22) is fixedly connected to one side of the first fastening unit (20) far away from the bag body (10), so that the first fastening unit (20) and the second fastening unit (30) can be separated;

or a second extending part (32) is arranged on one side of the second fastening unit (30) far away from the bag body (10) so as to separate the first fastening unit (20) and the second fastening unit (30);

or, one side of the first fastening unit (20) far away from the bag body (10) is fixedly connected with a first extension part (22), one side of the second fastening unit (30) far away from the bag body (10) is provided with a second extension part (32), and the first extension part (22) and the second extension part (32) are arranged in a staggered mode, so that the first fastening unit (20) and the second fastening unit (30) are separated.

5. The valve bag of claim 1, wherein: the first fastening unit (20) comprises a first reinforced sealing area (23) and a first sealing area (24), the first sealing area (24) is arranged on one side far away from the bag body (10), and the first reinforced sealing area (23) is arranged on one side close to the bag body (10);

the second fastening unit (30) comprises a second reinforced sealing area (33) and a second sealing area (34), the second sealing area (34) is arranged on one side far away from the bag body (10), and the second reinforced sealing area (33) is arranged on one side close to the bag body (10).

6. The valve bag of claim 5, wherein: the first sealing area (24) is a convex part extending towards the second sealing area (34), the second sealing area (34) is a concave part matched with the external dimension of the convex part, and the convex part is arranged in the concave part and connected with the concave part in a pressing fit mode.

7. The valve bag of claim 6, wherein: the convex part comprises an arc-shaped convex rib (241) and a first connecting rib (242), the first connecting rib (242) is fixedly connected with the bag body (10), the arc-shaped convex rib (241) and the first connecting rib (242) are of an integrated structure, and the overall dimension of the arc-shaped convex rib (241) is larger than that of the first connecting rib (242);

the concave part comprises an arc concave part (341) matched with the arc convex rib (241) and a hollow extrusion part (342) matched with the first connecting rib (242), the arc concave part (341) is fixedly connected with the bag body (10), the arc concave part (341) and the hollow extrusion part (342) are of an integrated structure, and the inner diameter of the arc concave part (341) is larger than that of the hollow extrusion part (342).

8. The valve bag of claim 5, wherein: the first reinforcing and sealing area (23) comprises a plurality of L-shaped first fastening pieces (231), the second reinforcing and sealing area (33) comprises a plurality of L-shaped second fastening pieces (331), and the first fastening pieces (231) and the second fastening pieces (331) can be buckled and connected to connect the first fastening unit (20) and the second fastening unit (30).

9. The valve bag of claim 8, wherein: the first fastener (231) comprises a second connecting rib (2311) and a first buckling part (2312), the second connecting rib (2311) is fixedly connected with the bag body (10), the second connecting rib (2311) and the first buckling part (2312) are of an integrated structure, and the first buckling parts (2312) of each first fastener (231) are arranged in the same direction;

second fastener (331) include third splice bar (3311) and second knot portion (3312), third splice bar (3311) with bag body (10) fixed connection, third splice bar (3311) with second knot portion (3312) formula structure as an organic whole, and each second fastener (331) include second knot portion (3312) syntropy sets up, and with the opposite direction of the setting of first knot portion (2312), first knot portion (2312) with second knot portion (3312) lock is connected.

10. The valve bag of claim 9, wherein: the first reinforcing sealing area (23) further comprises first limiting guide pieces (232) with the number corresponding to that of the first fasteners (231), the first limiting guide pieces (232) are arranged on one side close to the first fastener parts (2312), the cross section of each first limiting guide piece (232) is in a right trapezoid shape, and the inclined side of each right trapezoid forms an obtuse angle with the inner side face of the bag body (10);

and/or, sealed regional (33) is strengthened still including being equipped with the corresponding spacing guide of second fastener (331) quantity (332), just spacing guide of second (332) is located be close to one side of second knot portion (3312), just the cross-sectional shape of spacing guide of second (332) is right trapezoid, and right trapezoid's hypotenuse with the medial surface of bag body (10) forms the obtuse angle.