Self-sealing structure of a collection bag

Abstract

The utility model relates to the technical field of collection bag, put forward a kind of collection bag self-sealing structure, including collection bag body and draw hanging belt, the draw hanging belt is formed by two pieces of mutually adhered collection port film, the upper end of two pieces the collection port film is connected to form closed end by second heat-seal edge heat sealing, middle part is formed heat-seal passage by third heat-seal edge heat sealing, the lower part both sides of two pieces the collection port film are respectively provided with fourth heat-seal edge, the bottom of two pieces the collection port film is provided with fifth heat-seal edge, in the utility model, under the joint action of film elastic return, fourth heat-seal edge constraint and internal liquid pressure, heat-seal passage and bottom guide port can be instantaneously reclosed again, realize the instant automatic resealing after pulling out pipe. Through the above technical scheme, the problem that the effect of self-sealing under the action of gravity of birch sap in the bag body is affected when pulling out the collection tube in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of collection bag technology, specifically to a self-sealing structure for collection bags. Background Technology

[0002] When collecting birch sap, a collection hole is made in the birch tree, and a collection tube is inserted into the hole. The other end of the collection tube is inserted into the inlet of a self-sealing collection bag, and the collection bag is then suspended and secured. For a completely sealed collection, the optimal solution currently is to choose a self-sealing collection bag with a self-sealing structure.

[0003] In existing technologies, when a rigid collection tube is inserted into a self-sealing channel, it can form an interference fit with the self-sealing film inside the channel to achieve a seal during the collection process. However, because the rigid collection tube will cause the self-sealing film inside the channel to tighten when inserted, it will cause a certain deformation of the channel. As a result, when the collection tube is pulled out after collection, the sealing effect of the self-sealing opening under the gravity of the birch sap inside the bag will be affected, and it will not be able to close completely. This will cause the birch sap to leak or come into contact with the outside air during the transfer and transportation of the collection bag, thereby affecting its shelf life and effectiveness. Utility Model Content

[0004] This invention proposes a self-sealing structure for a collection bag, which solves the problem in related technologies where the self-sealing effect is affected by the gravity of the birch sap inside the bag when the collection tube is pulled out, leading to leakage of birch sap or contact with the outside air during the subsequent transfer and transportation of the collection bag.

[0005] The technical solution of this utility model is as follows: A self-sealing structure for a collection bag includes a collection bag body and a carrying strap. The carrying strap is composed of two collection port films that are attached to each other. The upper ends of the two collection port films are heat-sealed together by a second heat-sealing edge to form a closed end. The middle part is heat-sealed by a third heat-sealing edge to form a heat-sealed channel. A fourth heat-sealing edge is provided on both sides of the lower part of the two collection port films. The fourth heat-sealing edge is provided with a distance reserved from the bottom of the collection port film downwards and extends upwards beyond the bottom of the heat-sealed channel but not beyond its top. A fifth heat-sealing edge is provided at the bottom of the two collection port films. The length of the fifth heat-sealing edge is less than the width of the collection port film.

[0006] Preferably, the fourth heat-sealing edge is symmetrically arranged on both sides of the heat-sealing channel.

[0007] Preferably, the fifth heat-sealed edge is heat-sealed to the bottom of the collection port film, leaving gaps at both ends to form a channel for the birch sap to flow.

[0008] Preferably, the fourth and fifth heat-sealed edges are integrally formed with the collection port film through a heat-sealing process.

[0009] Preferably, the collection bag body is composed of two bag films, and the bag films are heat-sealed together by a first heat-sealing edge to form an accommodating space. The carrying strap is ironed and fixed to the upper end of the collection bag body.

[0010] Preferably, the lower ends of the two collection port films extend into the receiving space of the collection bag body, and the connection between the outer sides of the two collection port films and the inner surfaces of the two bag body films is heat-sealed.

[0011] Preferably, the two collection port films have a dividing opening formed on them.

[0012] The beneficial effects of this utility model are as follows: In this invention, when the guide tube is pulled out, the fourth and fifth heat-sealing edges can assist the membrane of the collection port, which has been stretched open due to insertion, to quickly rebound and reset. At the same time, the static pressure generated by the birch sap inside the collection bag body applies a pushing force to the membrane of the collection port from the inside, causing it to close. Under the combined action of the membrane's elastic return, the constraint of the fourth heat-sealing edge, and the internal liquid pressure, the heat-sealed channel and the bottom guide port can be instantly resealed, realizing immediate automatic resealing after tube removal. This achieves sealed collection from tube insertion to tube removal, minimizing the contact time between birch sap and air, and improving the quality of birch sap. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the collection bag structure of this utility model; Figure 2 This is a schematic diagram of the lifting strap structure of this utility model.

[0015] In the diagram: 1. Collection bag; 101. Bag body film; 102. First heat-sealed edge; 2. Lifting strap; 201. Collection port film; 202. Dividing port; 203. Second heat-sealed edge; 204. Third heat-sealed edge; 205. Heat-sealed channel; 206. Fourth heat-sealed edge; 207. Fifth heat-sealed edge. Detailed Implementation

[0016] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model. Example

[0017] like Figures 1-2 As shown, this embodiment proposes a self-sealing structure for a collection bag, including a collection bag body 1 and a carrying strap 2. The carrying strap 2 is composed of two collection port films 201 that are attached to each other. The upper ends of the two collection port films 201 are heat-sealed together by a second heat-sealing edge 203 to form a closed end, and the middle part is heat-sealed by a third heat-sealing edge 204 to form a heat-sealing channel 205. A fourth heat-sealing edge 206 is respectively provided on both sides of the lower part of the two collection port films 201. The fourth heat-sealing edge 206 is downward and connected to the collection port film 201. A gap is reserved at the bottom and extends upward beyond the bottom of the heat-sealed channel 205 but not beyond its top; the bottom of the two collection port films 201 are provided with a fifth heat-sealed edge 207, the length of the fifth heat-sealed edge 207 is less than the width of the collection port film 201, the fifth heat-sealed edge 207 is heat-sealed with the bottom of the collection port film 201, and gaps are left at both ends to form a channel for birch sap to flow; the fourth heat-sealed edge 206 and the fifth heat-sealed edge 207 are integrally formed with the collection port film 201 through a heat-sealing process.

[0018] like Figure 1 As shown, the collection bag body 1 is composed of two bag body films 101. The bag body films 101 are heat-sealed together by the first heat-sealing edge 102 to form an accommodating space. The carrying strap 2 is clamped and fixed to the upper end of the collection bag body 1. The lower ends of the two collection port films 201 extend into the accommodating space of the collection bag body. The connection between the outer side of the two collection port films 201 and the inner side surface of the two bag body films 101 is heat-sealed.

[0019] like Figure 1 , Figure 2 As shown, two collection port films 201 have a dividing opening 202 formed on them. The dividing opening 202 extends from the upper end of the collection port film 201 toward the collection bag body 1.

[0020] Working principle: When birch sap collection is required, the operator aligns the end of the guide tube of the external collection needle with the entrance of the heat-sealed channel 205 below the second heat-sealed edge 203 at the upper end of the lifting strap 2, inserts the guide tube, and applies downward pressure to the guide tube. The guide tube can then open the two tightly adhering collection port films 201 and enter the heat-sealed channel 205. The presence of the fourth heat-sealed edge 206 significantly enhances the tightness of the wrapping of the lower part of the two collection port films 201 to the outer wall of the guide tube, forming an excellent interference fit and achieving dynamic sealing. This effectively prevents sap from leaking out from between the guide tube and the channel wall and prevents air from entering. A certain distance is left between the bottom of the guide tube and the bottom of the heat-sealed channel, and the guide tube remains in the heat-sealed channel 205, ensuring the integrity of the structure and the reliability of the seal. After the birch sap collection is completed, the guide tube is pulled out of the self-sealing structure. During the pulling process, the fourth heat-sealing edge 206 and the fifth heat-sealing edge 207 on both sides assist the two collection port films 201, which were stretched open during insertion, to quickly spring back to their original positions. At the same time, the birch sap liquid already collected inside the collection bag body 1 generates a certain static pressure, causing the collection port films 201 to close from the inside. Under the combined action of elastic return, the constraint of the fourth heat-sealing edge 206, and the internal liquid pressure, the heat-sealing channel 205 and the guide port at the bottom can instantly re-seal, thus achieving immediate automatic resealing after the collection tube is pulled out. This process ensures a completely sealed collection process from insertion to removal, minimizing the contact between the birch sap and air, and significantly improving the freshness and quality of the collected sap.

[0021] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A self-sealing structure of a collection bag, comprising a collection bag body (1) and a carrying strap (2), characterized in that, The carrying strap (2) is composed of two pieces of collection port film (201) that are attached to each other. The upper ends of the two pieces of collection port film (201) are heat-sealed together by a second heat-sealing edge (203) to form a closed end. The middle part is heat-sealed by a third heat-sealing edge (204) to form a heat-sealed channel (205). A fourth heat-sealing edge (206) is provided on both sides of the lower part of the two pieces of collection port film (201). The fourth heat-sealing edge (206) is provided with a distance between the bottom of the collection port film (201) and the bottom of the heat-sealed channel (205) but not exceeding the top of it. A fifth heat-sealing edge (207) is provided at the bottom of the two pieces of collection port film (201). The length of the fifth heat-sealing edge (207) is less than the width of the collection port film (201).

2. A self-sealing closure for a collection bag according to claim 1, wherein The fourth heat-sealing edge (206) is symmetrically arranged on both sides of the heat-sealing channel (205).

3. The self-sealing structure of a collection bag according to claim 1, wherein The fifth heat-sealed edge (207) is heat-sealed to the bottom of the collection port film (201), leaving gaps at both ends to form a channel for the birch sap to flow.

4. The self-sealing structure of a collection bag according to claim 1, wherein The fourth heat-sealed edge (206) and the fifth heat-sealed edge (207) are integrally formed with the collection port film (201).

5. The self-sealing structure of a collection bag according to claim 1, wherein The collection bag body (1) is composed of two bag films (101). The bag films (101) are heat-sealed together by a first heat-sealing edge (102) to form an accommodating space. The carrying strap (2) is clamped and fixed to the upper end of the collection bag body (1).

6. A self-sealing port for a collection bag according to claim 5, wherein, The lower ends of the two collection port films (201) extend into the receiving space of the collection bag body, and the outer surfaces of the two collection port films (201) are heat-sealed to the inner surfaces of the two bag body films (101).

7. The self-sealing structure of a collection bag according to claim 1, wherein A dividing opening (202) is formed on the two collection port films (201).

Images