A stand-up pouch with pressure relief function

Abstract

The utility model discloses a kind of self-supporting bags with pressure relief function belong to packaging bag technical field.Aiming at the problem that conventional self-supporting bag cannot effectively relieve pressure when internal pressure rises, cannot be automatically sealed after pressure relief or is easy to be opened by mistake when transporting and storing, the following technical solutions are provided: a pressure relief mechanism is arranged at the opening of the bag body.The pressure relief mechanism includes a detachably connected pressure relief box and a pressure relief head.The pressure relief head includes a gas inlet head extending into the bag and a connecting pipe.The pressure relief box is provided with an elastic sheet, and a rubber sealing block is fixed to the end of the elastic sheet.The sealing block continuously presses the tapered groove at the end of the connecting pipe to achieve sealing under the action of the elastic sheet.When the pressure in the bag is too high, the gas overcomes the elastic force of the elastic sheet to open the sealing block and relieve the pressure.After pressure relief, the elastic sheet drives the sealing block to reset and restore the seal.The pressure relief box is also provided with a slidable limiting rod to limit the movement of the elastic sheet.The self-supporting bag can automatically relieve pressure and restore the seal, preventing accidental opening during transportation, and improving the safety and reliability of use.

Description

Technical Field

[0001] This utility model belongs to the field of packaging bag technology, and in particular relates to a stand-up pouch with pressure relief function. Background Technology

[0002] Stand-up pouches, as a common type of flexible packaging container, are widely used in the food, daily chemical, and pharmaceutical industries to hold liquids, powders, or granular contents. In actual use, stand-up pouches may experience increased internal pressure due to factors such as fermentation of the contents, temperature changes, or external compression. If the pressure cannot be released in time, the pouch may swell or even rupture, affecting packaging safety and the preservation of the contents.

[0003] However, existing stand-up pouches still have the following shortcomings in use:

[0004] Conventional stand-up pouches typically lack an effective internal pressure regulation mechanism, or employ complex pressure relief structures that are inconvenient to operate and difficult to maintain. Some pressure relief devices cannot automatically restore a sealed state after pressure relief, which can easily lead to continuous exposure of the contents to the external environment. In addition, some pressure relief devices lack a locking function, and may be accidentally opened during transportation or storage due to accidental contact or external pressure, posing a risk of leakage of the contents. Utility Model Content

[0005] The purpose of this invention is to provide a self-standing bag with a pressure relief function. In this invention, the self-standing bag uses an elastic sheet to continuously press the rubber sealing block into the conical groove to achieve a reliable seal. When the bag is over-pressurized, the gas pushes open the sealing block, automatically releasing pressure and then resetting. The sliding limit rod can lock the elastic sheet to prevent accidental opening and improve storage and transportation safety. The pressure relief box and the box cover adopt a detachable structure for easy maintenance. At the same time, the bottom of the box is provided with anti-slip convex strips, which also serve as an indicator of the operating direction of the limit rod, making it easy to operate and solving the existing technical problems.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] A stand-up pouch with pressure relief function, comprising:

[0008] The self-standing bag body has a pressure relief mechanism located on one side near the opening;

[0009] The pressure relief mechanism includes a pressure relief box and a pressure relief head. The pressure relief head consists of an air inlet and a connecting pipe. The air inlet is fixed to one end of the connecting pipe and they are connected. The pressure relief box includes a box body, a box cover, and a connecting ring. The connecting ring is fixed to one side of the box body and is connected to the interior.

[0010] One end of the connecting tube is sealed through the body of the stand-up pouch, its outer wall is threaded and threaded to the inner wall of the connecting ring, and extends into the box body;

[0011] It also includes a sealing component and a limiting component. The sealing component achieves sealing by continuously pressing the rubber sealing block into the conical groove with an elastic sheet. When overpressure occurs, the gas pushes open the sealing block, automatically releases pressure, and then resets. The limiting component switches between the locked and unlocked states of the sealing component by sliding a limiting rod.

[0012] Optionally, two mounting plates are fixed on one side of the box cover, and two mounting brackets with mounting grooves are provided on the inner wall of the box. The mounting plates engage with the mounting grooves. An abutment strip is fixed on the inner wall of the box, and the abutment strip fits against the edge of the box cover to ensure stable installation of the box cover.

[0013] Optionally, the air inlet is located inside the self-standing bag body and has multiple air inlets, through which gas in the self-standing bag enters the connecting pipe; the cover has multiple air outlets between two mounting plates for the gas inside the box to be discharged.

[0014] Optionally, the sealing assembly includes a sealing plate fixed inside the connecting pipe, the sealing plate having a conical groove on the side away from the air inlet head, and a through hole at the bottom of the conical groove communicating with the air inlet head; an L-shaped bent elastic sheet is fixed to the inner wall of the box, and a rubber sealing block fixed at its end is embedded in the conical groove to form a seal.

[0015] Optionally, the limiting component includes a limiting rod that slides through the box body. The limiting rod is located between the elastic sheet and the box cover and is in close contact with the elastic sheet. The middle section of the limiting rod is provided with a bent tube structure to form a relief groove. By moving the limiting rod up and down, the relief groove and the elastic sheet are aligned and offset accordingly, thereby locking and unlocking the elastic sheet.

[0016] Optionally, both ends of the limiting rod are fixed with protruding paddles, and the top and bottom of the box are fixed with U-shaped locking strips. The paddles engage with the slots of the adjacent U-shaped locking strips to position the limiting rod.

[0017] Optionally, two grooves are provided on one side of the lid, which facilitates the separation of the lid from the box body by applying force with a tool.

[0018] Optionally, two anti-slip protrusions are fixed to the bottom of the box. The anti-slip protrusions increase the friction at the bottom of the box and indicate the pushing direction of the limit rod.

[0019] Optionally, the pressure relief box and the pressure relief head are detachable via a threaded connection between a connecting ring and a connecting pipe, facilitating cleaning, replacement, and maintenance of the components.

[0020] The embodiments of this utility model have the following beneficial effects:

[0021] In this invention, the design of the elastic sheet and the rubber sealing block in the sealing component allows the elastic sheet to continuously press the rubber sealing block under normal use, making it tightly fit the inner wall of the conical groove to form a reliable seal and prevent gas leakage. When the internal pressure rises to a threshold, the gas pressure can overcome the elastic sheet and lift the rubber sealing block, achieving automatic pressure relief. After pressure relief, the elastic sheet drives the rubber sealing block to reset, restoring the sealing state and preventing the contents from being continuously exposed.

[0022] In this utility model, the limiting component can lock the sealing component by cooperating with the limiting rod and the elastic sheet; by sliding the limiting rod to adjust the relative position of the relief groove and the elastic sheet, when the relief groove and the elastic sheet are misaligned, the limiting rod abuts against the elastic sheet to restrict its movement, preventing the rubber sealing block from being accidentally opened due to external squeezing or accidental contact, thus improving the safety of the stand-up pouch during transportation or storage.

[0023] In this utility model, the pressure relief box and the pressure relief head are fixed by a connecting ring and a connecting pipe threaded connection, which is convenient for disassembly, cleaning or replacement; the box cover is installed by the engagement of the mounting plate and the box body mounting groove, and with the auxiliary positioning of the abutment strip, the box cover is ensured to be stably connected, while the groove can be used to assist in the force application for quick disassembly, which is convenient for the maintenance of the internal components of the box.

[0024] In this invention, the anti-slip ridges on the bottom of the box not only increase the friction with the contact surface and prevent the pressure relief box from sliding, but also serve as a direction indicator for the operating limit rod, making it easier for users to quickly determine the pushing direction of the limit rod and reducing the difficulty of operation.

[0025] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present invention;

[0029] Figure 3 This is a top cross-sectional view of a pressure relief mechanism according to an embodiment of the present invention;

[0030] Figure 4This is a three-dimensional structural schematic diagram of a pressure relief mechanism according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the internal structure of the pressure relief box according to an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the pressure relief head and the elastic sheet according to an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the cooperation structure between the limiting rod and the elastic sheet in one embodiment of the present invention.

[0034] In the diagram: 1. Stand-up pouch body; 2. Pressure relief box; 3. Pressure relief head; 4. Box body; 5. Box cover; 6. Connecting ring; 7. Air inlet head; 8. Connecting pipe; 9. Air inlet hole; 10. Mounting groove; 11. Elastic sheet; 12. Abutment strip; 13. Mounting plate; 14. Groove; 15. Air outlet; 16. Limiting rod; 17. Pulley; 18. U-shaped retaining strip; 19. Anti-slip convex strip; 20. Sealing plate; 21. Conical groove; 22. Rubber sealing block; 23. Relief groove. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0036] In the description of this utility model, it should be understood that the terms "opening", "upper", "middle", "length", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0038] In one embodiment: Please refer to Figure 1-7 As shown, this embodiment provides a stand-up pouch, including: a stand-up pouch body 1, a pressure relief mechanism, a closure component, and a limiting component.

[0039] In this embodiment, a pressure relief mechanism is provided on one side of the self-standing bag body 1 near the opening. This mechanism consists of a pressure relief box 2 and a pressure relief head 3.

[0040] In this embodiment, the pressure relief head 3 includes an air inlet head 7 and a connecting pipe 8. The air inlet head 7 is fixed to one end of the connecting pipe 8 and the two are connected. The air inlet head 7 is located inside the stand-up pouch body 1, and multiple air inlets 9 are opened on its side to guide the gas inside the stand-up pouch body 1 into the connecting pipe 8. The outer wall of the connecting pipe 8 is threaded, and one end of it is sealed and extends through the side wall of the stand-up pouch body 1 into the pressure relief box 2.

[0041] In this embodiment, the pressure relief box 2 consists of a box body 4, a box cover 5, and a connecting ring 6. The connecting ring 6 is fixed to the side of the box body 4 and communicates with the interior. Its inner wall is provided with threads that engage with the external threads of the connecting pipe 8 to achieve a detachable connection.

[0042] In this embodiment, the lid 5 is fixed to the box body 4 via a snap-fit ​​structure. Specifically, two mounting plates 13 are fixed to one side of the lid 5, and two mounting brackets are provided inside the side wall of the box body 4. Each mounting bracket has a mounting groove 10, and the mounting plates 13 engage with the mounting grooves 10 to achieve initial positioning. Abutment strips 12 are fixed to the inner walls of both sides of the box body 4, and the abutment strips 12 contact the edges of the lid 5 to ensure installation stability. Multiple vent holes 15 are provided on the side of the lid 5, and the vent holes 15 are located between the two mounting plates 13 to discharge gas from inside the box body 4.

[0043] In this embodiment, the sealing assembly is used to seal the end of the connecting pipe 8 extending into the housing 4. A sealing plate 20 is fixed inside the connecting pipe 8 near one end. A tapered groove 21 is formed on the side of the sealing plate 20 away from the air inlet head 7, and a through hole is provided at the bottom of the tapered groove 21 to communicate with the air inlet head 7. An elastic sheet 11 is fixed inside the side wall of the housing 4. The elastic sheet 11 has a bent L-shaped structure, and a rubber sealing block 22 is fixed to its free end. The rubber sealing block 22 is embedded in the tapered groove 21. The bent structure of the elastic sheet 11 continuously applies pressure to the rubber sealing block 22, allowing it to fit tightly against the inner wall of the tapered groove 21 to form a seal.

[0044] In this embodiment, the limiting component is used to control the opening and closing state of the sealing component. Sliding holes are provided at the top and bottom of the box body 4, and the two ends of the limiting rod 16 slide through the corresponding sliding holes. A bent tube structure is provided in the middle section of the limiting rod 16 to form a relief groove 23, and the relief groove 23 is biased towards the bottom end of the limiting rod 16. When the limiting rod 16 is in the locked position, the elastic sheet 11 is compressed by the main body of the limiting rod 16, and the rubber sealing block 22 remains sealed. When the limiting rod 16 is pushed upwards to align the relief groove 23 with the elastic sheet 11, one side of the elastic sheet 11 has space for movement. At this time, when the internal pressure of the stand-up pouch body 1 is too high, the larger air pressure can overcome the elastic force of the elastic sheet 11 and drive the rubber sealing block 22 to disengage from the conical groove 21, thus opening the pressure relief channel.

[0045] This application can be used in the field of packaging bag technology, or in other fields applicable to this application.

[0046] In another embodiment: Reference Figure 4 , 5 A stand-up pouch with pressure relief function is applied to the field of packaging bag technology.

[0047] In this embodiment, two grooves 14 are provided on the side of the lid 5 to facilitate disassembly. The lid 5 and the box body 4 can be separated by inserting a tool into the grooves 14.

[0048] In this embodiment, both ends of the limiting rod 16 are fixed with levers 17, and one side surface of each lever 17 is provided with a protrusion to facilitate the lever 17 being moved. The top and bottom of the box body 4 are fixed with U-shaped retaining strips 18, and the levers 17 are inserted into the slots formed by the U-shaped retaining strips 18 to position the limiting rod 16.

[0049] In this embodiment, two anti-slip protrusions 19 are provided at the bottom of the box body 4, which can increase the friction with the contact surface and indicate the pushing direction of the limiting rod 16 by the position of the protrusions.

[0050] The usage process and working principle of this utility model technical solution are as follows:

[0051] When the stand-up pouch is in normal use, the sealing component is in a sealed state. At this time, the elastic sheet 11, due to the elastic force generated by its own bending structure, can continuously press the rubber sealing block 22 towards the sealing plate 20, so that the rubber sealing block 22 fits tightly against the inner wall of the conical groove 21 of the sealing plate 20, thereby completely sealing the end of the connecting pipe 8 away from the air inlet 7 and preventing the gas in the stand-up pouch body 1 from leaking through the connecting pipe 8.

[0052] When the pressure inside the stand-up pouch increases and needs to be released, the gas inside the stand-up pouch body 1 enters the connecting pipe 8 through the air inlet 9 on the air inlet head 7. Then, under the action of the internal pressure of the stand-up pouch body 1, it overcomes the elasticity of the elastic sheet 11 and pushes up the rubber sealing block 22. At this time, the excess gas inside the stand-up pouch body 1 flows into the box body 4 through the connecting pipe 8, and is finally discharged into the external environment through the air outlet 15 on the box cover 5, thus realizing the pressure relief function. After the pressure relief is completed, the elastic sheet 11 can drive the rubber sealing block 22 to approach the sealing plate 20 again. The rubber sealing block 22 will be pressed back into the conical groove 21 and tightly fit against the groove wall, restoring the sealed state.

[0053] When the operator needs to lock the sealing component, the operator can move the limit rod 16 along the box 4 by moving the toggle block 17 on the top or bottom of the box 4. By making the corresponding toggle block 17 engage with the corresponding U-shaped clip groove, the limit rod 16 can be positioned, thus preventing the limit rod 16 from moving arbitrarily. During the movement of the limit rod 16, by making the clearance groove 23 on it offset from or aligned with the elastic piece 11, the elastic piece 11 can be limited or correspondingly clearanced. When limiting the elastic piece 11, by making the clearance groove 23 offset from the elastic piece 11, the limit rod 16 itself will abut against one side of the elastic piece 11, thus limiting the elastic piece 11. This ensures that the movable end of the elastic piece 11 with the rubber sealing block 22 will not move away from the connecting pipe 8, and ensures that the interior of the stand-up pouch body 1 can maintain a stable seal, thus preventing the gas inside the stand-up pouch body 1 from escaping due to external pressure.

[0054] The lid 5 is fixed by the engagement of the mounting plate 13 with the mounting groove 10 of the box body 4. The abutment strips 12 on both sides of the box body 4 further ensure the stability of the lid 5 during installation. If it is necessary to remove the lid 5, the mounting plate 13 can be dislodged from the mounting groove 10 by applying force through the groove 14. The anti-slip protrusions 19 on the bottom of the box body 4 not only increase the friction with the contact surface, but also serve as a directional indicator when operating the limit rod 16, making it easier to determine the pushing direction of the limit rod 16.

[0055] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0056] It should be noted that in the description of this specification, descriptions such as "first" and "second" are only used to distinguish the features and do not have any actual order or directional meaning. This application is not limited to this.

[0057] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A stand-up pouch with pressure relief function, characterized in that, include: The self-standing bag body (1) has a pressure relief mechanism on one side near the opening; The pressure relief mechanism includes a pressure relief box (2) and a pressure relief head (3). The pressure relief head (3) consists of an air inlet (7) and a connecting pipe (8). The air inlet (7) is fixed to one end of the connecting pipe (8) and connected to it. The pressure relief box (2) includes a box body (4), a box cover (5), and a connecting ring (6). The connecting ring (6) is fixed to one side of the box body (4) and communicates with the interior. One end of the connecting tube (8) is sealed through the self-standing bag body (1), and its outer wall is threaded and threaded to the inner wall of the connecting ring (6), and extends into the box body (4); It also includes a sealing component and a limiting component. The sealing component achieves sealing by continuously pressing the rubber sealing block (22) into the conical groove (21) with an elastic sheet (11). When there is overpressure, the gas pushes open the sealing block and automatically releases pressure and resets. The limiting component switches between locking and unlocking states of the sealing component by sliding the limiting rod (16).

2. The self-standing bag with pressure relief function according to claim 1, characterized in that, Two mounting plates (13) are fixed on one side of the box cover (5). The inner wall of the box body (4) is provided with two mounting brackets with mounting grooves (10). The mounting plates (13) engage with the mounting grooves (10). An abutment strip (12) is fixed on the inner wall of the box body (4). The abutment strip (12) fits against the edge of the box cover (5) to ensure that the box cover (5) is stably installed.

3. The self-standing bag with pressure relief function according to claim 2, characterized in that, The air inlet (7) is located inside the self-standing bag body (1) and has multiple air inlets (9). The gas inside the self-standing bag enters the connecting pipe (8) through the air inlets (9). The box cover (5) has multiple air outlets (15) between the two mounting plates (13) for the gas inside the box body (4) to be discharged.

4. The self-standing bag with pressure relief function according to claim 1, characterized in that, The sealing assembly includes a sealing plate (20) fixed inside the connecting pipe (8). The sealing plate (20) has a conical groove (21) on the side away from the air inlet (7). The bottom of the conical groove (21) has a through hole that communicates with the air inlet (7). The inner wall of the box (4) is fixed with an L-shaped bent elastic sheet (11), and the rubber sealing block (22) fixed at its end is embedded in the conical groove (21) to form a seal.

5. The self-standing bag with pressure relief function according to claim 4, characterized in that, The limiting component includes a limiting rod (16) that slides through the box body (4). The limiting rod (16) is located between the elastic sheet (11) and the box cover (5) and is in close contact with the elastic sheet (11). The middle section of the limiting rod (16) is provided with a bent tube structure to form a relief groove (23). By moving the limiting rod (16) up and down, the relief groove (23) and the elastic sheet (11) are aligned and staggered accordingly, thereby locking and unlocking the elastic sheet (11).

6. The self-standing bag with pressure relief function according to claim 5, characterized in that, Both ends of the limiting rod (16) are fixed with protruding paddles (17), and the top and bottom of the box body (4) are fixed with U-shaped clips (18). The paddles (17) engage with the slots of the adjacent U-shaped clips (18) to achieve the positioning of the limiting rod (16).

7. The self-standing bag with pressure relief function according to claim 2, characterized in that, Two grooves (14) are provided on one side of the lid (5), and the grooves (14) facilitate the separation of the lid (5) from the box body (4) by applying force with a tool.

8. The self-standing bag with pressure relief function according to claim 5, characterized in that, The bottom of the box (4) is fixed with two anti-slip ridges (19). The anti-slip ridges (19) increase the friction at the bottom of the box (4) and indicate the pushing direction of the limit rod (16).

9. The stand-up pouch with pressure relief function according to any one of claims 1 to 8, characterized in that, The pressure relief box (2) and the pressure relief head (3) are detachable through the threaded connection between the connecting ring (6) and the connecting pipe (8), which facilitates the cleaning, replacement and maintenance of the components.

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