阅读说明：本技术 防漏阀口袋 (Leak-proof valve bag ) 是由 林慧 于 2021-08-30 设计创作，主要内容包括：本发明提供了一种能封闭袋体端面的防漏阀口袋,其阀口结构包括阀口片和与阀口片一体成型的压片；阀口片包括阀口片上部、阀口片下部和阀口片中部,阀口片上部和阀口片下部向上封片方向折叠,粘接形成阀口上片；阀口上片与上封片粘结固定；第一上封片设置有第一折叠部,第一折叠部与第一上封片之间具有第一折叠间隙；第二上封片设置有第二折叠部,第二折叠部与第二上封片之间具有第二折叠间隙；第一折叠部与压片下部粘结固定,第二折叠部与压片上部粘结固定；压片中部与前封片粘结固定。在灌料的过程中避免物料飞入袋体的分层中,有利于提高密封效果和节约物料。(The invention provides a leak-proof valve bag capable of sealing the end face of a bag body, wherein a valve port structure of the leak-proof valve bag comprises a valve port piece and a pressing piece which is integrally formed with the valve port piece; the valve port piece comprises a valve port piece upper part, a valve port piece lower part and a valve port piece middle part, wherein the valve port piece upper part and the valve port piece lower part are folded towards the upper sealing piece direction and are bonded to form a valve port upper piece; the valve port upper piece is fixedly bonded with the upper sealing piece; the first upper sealing sheet is provided with a first folding part, and a first folding gap is formed between the first folding part and the first upper sealing sheet; the second upper sealing sheet is provided with a second folding part, and a second folding gap is formed between the second folding part and the second upper sealing sheet; the first folding part is fixedly bonded with the lower part of the pressing sheet, and the second folding part is fixedly bonded with the upper part of the pressing sheet; the middle part of the pressing sheet is fixedly bonded with the front sealing sheet. Avoid the material to fly into the layering of the bag body at the in-process of irritating the material, be favorable to improving sealed effect and material saving.)

1. The leak-proof valve pocket comprises a bag body (1) and a valve port structure (2), wherein a pocket mouth sealing element consisting of a front sealing sheet (13), a rear sealing sheet (14) and an upper sealing sheet (15) is arranged on the bag body (1); the upper sealing sheet (15) comprises a first upper sealing sheet (11) and a second upper sealing sheet (12); the valve port structure (2) is arranged on the front sealing sheet (13) and forms a valve port channel (7); the method is characterized in that:

the valve port structure (2) comprises a valve port piece (21) and a pressing piece (23) which is integrally formed with the valve port piece (21);

the valve port piece (21) comprises a valve port piece upper part (211), a valve port piece lower part (212) and a valve port piece middle part (213), wherein the valve port piece upper part (211) and the valve port piece lower part (212) are folded towards the upper sealing piece (15) and are bonded to form a valve port upper piece (22); the valve port upper sheet (22) is fixedly bonded with the upper sealing sheet (15);

the pressing sheet (23) is arranged at the discharging end, and the pressing sheet (23) is folded towards the inner surface direction of the front sealing sheet (13); the pressing sheet (23) comprises a pressing sheet upper part (231), a pressing sheet middle part (232) and a pressing sheet lower part (233); the upper pressing piece part (231) corresponds to the upper valve port piece part (211), the middle pressing piece part (232) corresponds to the middle valve port piece part (213), and the lower pressing piece part (233) corresponds to the lower valve port piece part (212);

two ends of the first upper sealing sheet (11) are provided with first folding parts (111), and a first folding gap is formed between the first folding parts (111) and the first upper sealing sheet (11); two ends of the second upper sealing sheet (12) are provided with second folding parts (121), and a second folding gap is formed between the second folding parts (121) and the second upper sealing sheet (12); the first folding part (111) and the second folding part (121) which are arranged correspondingly are integrally formed with the front cover sheet (13);

the first folding part (111) is fixedly bonded with the lower pressing piece part (233), and the second folding part (121) is fixedly bonded with the upper pressing piece part (231); the middle part (232) of the pressing sheet is fixedly bonded with the front sealing sheet (13).

2. The leak resistant valve bag of claim 1 wherein: a separation baffle plate (4) is arranged on the valve port upper plate (22); the separation blocking sheet (4) extends to the lower part of the rear sealing sheet (14).

3. The leak resistant valve bag as defined in claim 1 or 2, wherein: one end of the separation blocking piece (4) far away from the rear sealing piece (14) is provided with a V-shaped notch, and a first connecting part (41) and a second connecting part (42) which are correspondingly arranged are formed;

the first connecting part (41) extends into the space between the lower part (233) of the pressing sheet and the upper sealing sheet (15), the upper surface of the first connecting part (41) is fixedly bonded with the upper sealing sheet (15), and the lower surface of the first connecting part (41) is fixedly bonded with the lower part (233) of the pressing sheet;

the second connecting part (42) extends into the space between the upper part (231) of the pressing sheet and the upper sealing sheet (15), the upper surface of the second connecting part (42) is fixedly bonded with the upper sealing sheet (15), and the lower surface of the second connecting part (42) is fixedly bonded with the upper part (231) of the pressing sheet.

4. The leak resistant valve bag as defined in claim 1 or 2, wherein: the separation blocking piece (4) is arranged below the valve port upper piece (22); the upper surface of the separation blade (4) is fixedly bonded with the lower surface of the valve port upper blade (22).

5. The leak resistant valve bag as defined in claim 1 or 2, wherein: the upper surface of the separation sheet (4) is fixedly bonded with the lower surface of the rear sealing sheet (14).

6. The leak resistant valve bag as defined in claim 1 or 2, wherein: the length of the valve port piece (21) is equal to that of the pressing piece (23).

Technical Field

The invention relates to the field of packaging supplies, in particular to a leakage-proof valve bag.

Background

The valve bag is mainly used for packaging powdery or granular solid materials and flexible articles such as edible powder, chemical fertilizer, synthetic materials, grains, explosives, grains, salt, mineral substances and the like. The valve bag mainly comprises a bag body and a valve port, the sealing pieces are mutually overlapped to form a bag opening sealing piece, the feeding end of the valve port is positioned outside the bag body, and the discharging end is inserted into the bag body between the bag opening sealing pieces. The material enters the channel body of the valve port structure from the feeding end and then is flushed out from the discharge port to enter the bag body.

The invention patent with the publication number of CN104229279B discloses a valve bag and a valve port structure thereof, wherein a fixed layer is arranged at the discharge end of a channel body of the valve port structure, the fixed layer and the channel body are integrally formed, and the fixed layer is folded towards the lower surface of a sealing piece at the discharge end and is bonded and fixed with the lower surface of the sealing piece at the discharge end. When carrying out the material filling, because the sealing member terminal surface of discharge end has only been sealed to the fixed layer, in the actual operation in-process, the material of dashing out especially powdered or the material that the quality is lighter still can fly into not by the confined bag body layering, reduces sealed effect and causes the waste of material.

Disclosure of Invention

The invention aims to solve the technical problem of providing a leakage-proof valve bag which can seal the end face of a bag body.

The technical scheme adopted by the invention for solving the technical problems is as follows: the leak-proof valve pocket comprises a bag body and a valve port structure, wherein a bag opening sealing element consisting of a front sealing sheet, a rear sealing sheet and an upper sealing sheet is arranged on the bag body; the upper sealing sheet comprises a first upper sealing sheet and a second upper sealing sheet; the valve port structure is arranged on the front sealing sheet and forms a valve port channel;

the valve port structure comprises a valve port piece and a pressing piece which is integrally formed with the valve port piece;

the valve port piece comprises an upper valve port piece part, a lower valve port piece part and a middle valve port piece part, wherein the upper valve port piece part and the lower valve port piece part are folded towards the upper sealing piece direction and are bonded to form an upper valve port piece; the valve port upper piece is fixedly bonded with the upper sealing piece;

the pressing sheet is arranged at the discharging end and is folded towards the inner surface direction of the front sealing sheet; the pressing sheet comprises a pressing sheet upper part, a pressing sheet middle part and a pressing sheet lower part; the upper part of the pressing sheet corresponds to the upper part of the valve port sheet, the middle part of the pressing sheet corresponds to the middle part of the valve port sheet, and the lower part of the pressing sheet corresponds to the lower part of the valve port sheet;

two ends of the first upper sealing sheet are provided with first folding parts, and a first folding gap is formed between the first folding parts and the first upper sealing sheet; two ends of the second upper sealing sheet are provided with second folding parts, and a second folding gap is formed between the second folding parts and the second upper sealing sheet; the first folding part and the second folding part which are arranged correspondingly are integrally formed with the front sealing piece;

the first folding part is fixedly bonded with the lower part of the pressing sheet, and the second folding part is fixedly bonded with the upper part of the pressing sheet; the middle part of the pressing sheet is fixedly bonded with the front sealing sheet.

Furthermore, a separation baffle is arranged on the valve port upper piece; the baffle plate extends to the lower part of the rear sealing plate.

Furthermore, one end of the blocking piece, which is far away from the rear sealing piece, is provided with a V-shaped notch, and a first connecting part and a second connecting part which are correspondingly arranged are formed;

the first connecting part extends into the space between the lower part of the pressing sheet and the upper sealing sheet, the upper surface of the first connecting part is fixedly bonded with the upper sealing sheet, and the lower surface of the first connecting part is fixedly bonded with the lower part of the pressing sheet;

the second connecting portion extends into the space between the upper portion of the pressing sheet and the upper sealing sheet, the upper surface of the second connecting portion is fixedly bonded with the upper sealing sheet, and the lower surface of the second connecting portion is fixedly bonded with the upper portion of the pressing sheet.

Further, the separation baffle sheet is arranged below the upper sheet of the valve port; the upper surface of the separation blade is fixedly bonded with the lower surface of the valve port upper blade.

Furthermore, the upper surface of the separation blade is fixedly bonded with the lower surface of the rear sealing sheet.

Further, the length of the valve port piece is equal to that of the pressing piece.

Compared with the prior art, the invention has the beneficial effects that: the invention provides a leak-proof valve bag capable of sealing the end face of a bag body, which is simple in structure and easy to realize, prevents materials from flying into the layering of the bag body in the filling process, and is favorable for improving the sealing effect and saving the materials.

Drawings

FIG. 1 is a longitudinal cross-sectional view of the present invention;

FIG. 2 is a transverse cross-sectional view of the present invention;

FIG. 3 is a schematic view of the construction of the pouch of the present invention;

FIG. 4 is an expanded schematic view of the valve port structure of the present invention;

FIG. 5 is a schematic view of the valve port structure of the present invention in combination with a bag body after deployment;

FIG. 6 is a schematic view of an installation structure of a first embodiment of the barrier sheet of the present invention;

FIG. 7 is a schematic plan view of a first embodiment of the barrier sheet of the present invention;

FIG. 8 is a schematic view of the mounting structure of a second embodiment of the barrier rib of the present invention;

reference numerals: 1-bag body; 11-a first upper sealing sheet; 111-a first fold; 12-a second cover slip; 121-a second fold; 13-front sealing sheet; 14-back cover sealing; 15-sealing piece mounting; 141-rear cover sheet end face; 2-valve port structure; 21-valve flap; 211-valve flap upper portion; 212-valve flap lower part; 213-valve flap middle part; 22-valve port upper piece; 23-tabletting; 231-upper part of tablet; 232-middle of the tablet; 233-lower part of tablet; 4-separation baffle plate; 41-a first connection; 42-a second connection; 5-a first fold line; 6-a second fold line; 7-valve port channel.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

As shown in the attached drawings, the leakage-proof valve bag comprises a bag body 1 and a valve port structure 2, wherein a bag opening sealing element consisting of a front sealing sheet 13, a rear sealing sheet 14 and an upper sealing sheet 15 is arranged on the bag body 1; the upper sealing sheet 15 comprises a first upper sealing sheet 11 and a second upper sealing sheet 12; the valve port structure 2 is arranged on the front sealing sheet 13 and forms a valve port channel 7; the valve port structure 2 comprises a valve port piece 21 and a pressing piece 23 which is integrally formed with the valve port piece 21; the valve flap 21 comprises a valve flap upper part 211, a valve flap lower part 212 and a valve flap middle part 213, wherein the valve flap upper part 211 and the valve flap lower part 212 are folded towards the upper sealing sheet 15 and are bonded to form the valve flap upper sheet 22; the valve port upper sheet 22 is fixedly bonded with the upper sealing sheet 15; the pressing sheet 23 is arranged at the discharging end, and the pressing sheet 23 is folded towards the inner surface direction of the front sealing sheet 13; the pressing sheet 23 comprises a pressing sheet upper part 231, a pressing sheet middle part 232 and a pressing sheet lower part 233; the upper pressing piece 231 corresponds to the upper valve port piece 211, the middle pressing piece 232 corresponds to the middle valve port piece 213, and the lower pressing piece 233 corresponds to the lower valve port piece 212; two ends of the first upper sealing sheet 11 are provided with first folding parts 111, and a first folding gap is formed between the first folding parts 111 and the first upper sealing sheet 11; two ends of the second upper sealing sheet 12 are provided with second folding parts 121, and a second folding gap is formed between the second folding parts 121 and the second upper sealing sheet 12; the first folding part 111 and the second folding part 121 which are correspondingly arranged are integrally formed with the front cover sheet 13; the first folding part 111 is fixedly bonded with the lower part 233 of the tablet, and the second folding part 121 is fixedly bonded with the upper part 231 of the tablet; the middle part 232 of the pressing sheet is fixedly bonded with the front sealing sheet 13.

The first folding line 5 divides the valve flap 21 into a valve flap upper part 211, a valve flap middle part 213 and a valve flap lower part 212, the valve flap 21 is folded towards the upper sealing piece 15 according to the first folding line 5, and the valve flap upper part 211 and the valve flap lower part 212 are bonded and fixed to form the valve flap upper part 22. At this time, the port upper plate 22 and the port plate middle 213 form the port channel 7. When in use, the valve port channel 7 is in a hollow cylindrical structure with two open ends; when not in use, the hollow cylinder is flattened to form a rectangular structure. The feed end of the valve port channel 7 is positioned outside the bag body 1, and the discharge end is inserted into the bag body 1 from the space between the bag opening sealing elements. A pressing piece 23 which is integrally formed with the valve port piece 21 is arranged at the discharge end of the valve port channel 7, and the pressing piece 23 is folded towards the inner surface of the front sealing piece 13 according to a second folding line 6. The first folding line 5 divides the wafer 23 into a wafer upper portion 231, a wafer middle portion 232 and a wafer lower portion 233. The upper pressing piece 231 corresponds to the upper valve port piece 211, the middle pressing piece 232 corresponds to the middle valve port piece 213, and the lower pressing piece 233 corresponds to the lower valve port piece 212. The first folding portions 111 are provided at both ends of the first upper cover sheet 11, and the second folding portions 121 are provided at both ends of the second upper cover sheet 12. The first fold 111 and the second fold 121, which are arranged correspondingly, are integrally formed with the front cover sheet 13. The upper part 231 of the folded pressing piece 23 is folded into the second folding gap and is fixedly bonded with the lower surface of the second folding part 121; the lower part 233 of the pressing piece is folded into the first folding gap and is bonded and fixed with the lower surface of the first folding part 111; the middle part 232 of the pressing sheet is fixedly bonded with the lower surface of the front sealing sheet 13. Since the bag body 1 of the valve bag is generally composed of three or more layers, the adhesion between the layers tends to be weak and many voids remain. When the material is powdered or light, the material rushes into the bag body 1 from the valve port channel 7, and the powdered or light material easily flies into the layering of the front sealing sheet 13, the first folding part 111 and the second folding part 121. At this time, the end surfaces of the second folding portion 121, the front sealing sheet 13 and the first folding portion 111 are respectively sealed by the upper pressing sheet portion 231, the middle pressing sheet portion 232 and the lower pressing sheet portion 233, so that the flying materials can not enter the layering of the bag body 1, and the sealing effect and the material saving are facilitated.

The impact force is often larger in the material filling process, and the rear sealing piece end face 141 opposite to the material discharging end is not closed, so that the delamination is easily generated under the action of external force. In order to solve the above technical problem, preferably, the valve port upper plate 22 is provided with a separation blade 4; the baffle 4 extends below the back cover 14. When carrying out the material filling, the material dashes out from the discharge gate and gets into the bag body 1, because back mounting 14 is located the top that separates separation blade 4 one end, separates that separation blade 4 produces the shielding effect in the top to the material that dashes out, and the material can directly get into the bag body 1, can not exert an effect to back mounting terminal surface 141, guarantees that back mounting terminal surface 141 can not the layering peel off. And further prevent the material from flying into the layering of peeling off, influence sealed effect, cause the material extravagant.

The separation blocking piece 4 can be arranged between the upper sealing piece 15 and the valve port upper piece 22; or may be disposed below the valve port upper plate 22, and the upper surface of the barrier sheet 4 may be bonded to the lower surface of the valve port upper plate 22. In both of the above embodiments, the barrier sheet 4 functions to prevent delamination of the back cover sheet end face 141 of the back cover sheet 14.

In the first embodiment, as shown in fig. 6 and 7, one end of the separation blade 4 away from the back cover sheet 14 is provided with a V-shaped notch, and a first connecting portion 41 and a second connecting portion 42 are formed and arranged correspondingly; the first connecting part 41 extends into the space between the lower pressing piece part 233 and the upper sealing piece 15, the upper surface of the first connecting part 41 is fixedly bonded with the upper sealing piece 15, and the lower surface of the first connecting part 41 is fixedly bonded with the lower pressing piece part 233; the second connecting portion 42 extends between the upper pressing portion 231 and the upper sealing piece 15, the upper surface of the second connecting portion 42 is fixedly bonded to the upper sealing piece 15, and the lower surface of the second connecting portion 42 is fixedly bonded to the upper pressing portion 231. The material is rushed out from the discharge end and enters the bag body 1, and because the separation blocking piece 4 is positioned below the rear sealing piece 14, the rushed material can not generate force effect on the end face 141 of the rear sealing piece, and further the separation blocking piece 4 can not be separated from the valve port upper piece 22 in a layered manner.

In the second embodiment, as shown in fig. 8, the separation blade 4 is disposed below the valve port upper blade 22; the upper surface of the separation sheet 4 is fixedly bonded with the lower surface of the valve port upper sheet 22. Similarly, the material is flushed out from the discharge end and enters the bag body 1, and since the separation blade 4 is located below the back cover sheet 14, the flushed material does not exert a force on the end face 141 of the back cover sheet, and thus the separation blade 4 and the valve port upper sheet 22 are not delaminated. The barrier 4 in this embodiment is of rectangular configuration.

Because the upper surface of the separation baffle 4 is not fixedly bonded with the lower surface of the rear sealing piece 14, when powdery materials are filled, the powder is light in weight, so that the powdery materials easily escape from a gap between the upper surface of the separation baffle 4 and the lower surface of the rear sealing piece 14, and the materials are wasted. In order to solve the above-mentioned problems, the upper surface of the barrier sheet 4 is bonded and fixed to the lower surface of the back cover sheet 14. The upper surface of the separation sheet 4 and the lower surface of the back sealing sheet 14 are bonded without a gap, so that light materials cannot escape.

In order to maximize the sealing effect of the pressing sheet 23 on the bag body 1, it is preferable that the length of the valve port sheet 21 is equal to the length of the pressing sheet 23. The pressing piece 23 can completely close the end surfaces of the first folded portion 111 and the second folded portion 121, and the valve port passage 7 is not easily detached due to a large bonding area.

The above is a specific implementation manner of the invention, and it can be seen from the implementation process that the invention provides a leak-proof valve bag capable of sealing the end face of a bag body, which has a simple structure and is easy to implement, and prevents materials from flying into the layering of the bag body in the filling process, thereby being beneficial to improving the sealing effect and saving the materials.