Connecting fitting of packaging bag for sub-packaging chemicals

Abstract

The utility model relates to the technical field of liquid packaging, transportation and storage, in particular to a connecting fitting of a packaging bag which is used for subpackaging chemicals and is particularly suitable for photoresist products, and the connecting fitting comprises a connector, a buckle, a flow meter, a feeding pipe and a discharging pipe, the connector serves as an inlet and outlet for feeding and discharging of the packaging bag and is arranged at the top of the packaging bag. The outer side of the connector is sleeved with a buckle. The flowmeter sleeves the outer side of the buckle; one end of the feeding pipe or the discharging pipe penetrates through the buckle and the connector and extends into the bottom of the packaging bag, and the other end of the feeding pipe or the discharging pipe is connected with the flowmeter. The flowmeter is provided with a flow hole with a certain size, the bottom of the flow hole is communicated with an inlet of the feeding pipe or the discharging pipe, and the top of the flow hole is used for being connected with an external conveying pipeline. According to the utility model, chemicals can be quickly fed and discharged, the leakage risk is reduced, manpower assistance is realized, repeated discharging can be realized according to use requirements, the discharging weight can be accurately controlled, all the chemicals can be discharged during discharging, and the purposes of zero residue and chemical saving are achieved.

Description

Technical Field

[0001] This utility model relates to the field of liquid packaging, transportation, and storage technology, and in particular to a connecting accessory for a chemical packaging bag. Background Technology

[0002] Chemical packaging bags are containers for storing and transporting various chemical liquids. They can replace expensive tanks, drums, and other traditional packaging for non-hazardous liquid transport. Each flexible plastic chemical packaging bag is placed inside a matching rigid container (usually barrel-shaped) for convenient transport. Chemical packaging bags consist of an inner liner and an outer liner, forming a double-layered structure with a gap in between.

[0003] However, existing chemical packaging bags on the market have separate inlet and outlet ports. The presence of two ports not only increases the risk of chemical leakage, but also results in poor sealing. The entire feeding and unloading process requires manual assistance, and there is a risk of residue during unloading. In addition, the amount of chemicals injected into the packaging bag during feeding is often not accurately measured. Utility Model Content

[0004] In order to effectively solve the technical problems in the background art, the main purpose of this utility model is to provide a connecting accessory for packaging bags for dispensing chemicals, so that chemicals can be quickly fed and unloaded, reducing the risk of leakage and the need for manual assistance, while accurately controlling the storage amount of chemicals in the packaging bag.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A connecting accessory for a chemical packaging bag includes an interface, a buckle, a flow meter, and an inlet pipe and a discharge pipe with the same structure.

[0007] The interface serves as the inlet and outlet for feeding and discharging the packaging bag, and is located at the top of the packaging bag; a buckle is fitted on the outside of the interface; the flow meter is fitted on the outside of the buckle; the bottom of the feed pipe or discharge pipe passes through the buckle and the interface respectively and extends into the bottom of the packaging bag, and the top of the feed pipe or discharge pipe is connected to the flow meter; the flow meter is provided with a flow hole of a certain size, the top of the flow hole is connected to the inlet of the feed pipe or discharge pipe, and the top is used to connect to the external conveying pipeline.

[0008] Furthermore, the interface includes a base sealed on the packaging bag, a hollow connecting seat on the base for connecting a feed pipe or a discharge pipe, and an opening on the packaging bag corresponding to the position of the hollow connecting seat, through which the feed pipe or discharge pipe can be inserted into the bottom of the packaging bag.

[0009] Furthermore, the buckle includes a cover structure that fastens to the base and has a hole in the center of the base, and also includes a cylindrical structure extending upward from the hole; the hollow connecting seat passes through the cover structure and is fitted inside the cylindrical structure.

[0010] Furthermore, the flow meter includes an annular wrapping cylinder and a flow body located at its center; the wrapping cylinder and the flow body are fixed together by multiple evenly distributed connecting frames; the top of the connecting frames is provided with a central plate, and the outer wall of the central plate is connected to the inner wall of the wrapping cylinder.

[0011] Furthermore, the flow body includes a centrally located circular nozzle of a certain length, with multiple side flow holes evenly distributed around the outer periphery of the nozzle; the side flow holes penetrate the central plate.

[0012] Furthermore, the bottom of the round nozzle is a through hole for connecting to the feed pipe or the discharge pipe; the top of the round nozzle is a blind hole, and the end face of the blind hole is provided with multiple center flow holes of equal size.

[0013] Furthermore, the wrapping cylinder is sleeved on the outside of the snap-fit ​​cylinder structure, and the top of the round nozzle is used to connect to the external pipeline, while the bottom of the round nozzle is located inside the hollow connecting seat and is used to connect to the feed pipe or the discharge pipe.

[0014] Furthermore, the outer side of the wrapping cylinder is provided with threads. When feeding and unloading are not required, a dust cover is provided on the outside of the flow meter. The dust cover is provided with internal threads that cooperate with the annular wrapping cylinder.

[0015] Furthermore, one end of the feed pipe and discharge pipe is used for connecting the interface, and the other end is provided with a bracket for connecting the flow meter; the bracket includes an integrally formed connecting section and a supporting section; the connecting section is in the shape of a straight pipe and is fitted inside the feed pipe and discharge pipe; the supporting section is fitted on the outside of the round nozzle.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This utility model discloses a connecting accessory for a chemical packaging bag. The accessory is used with the packaging bag and can be used with a matching rigid container to facilitate feeding and unloading. The accessory is versatile, has a good sealing effect, is oxygen-proof, moisture-proof, and corrosion-resistant, and reduces the risk of chemical leakage. At the same time, the flow meter design can accurately control the flow rate of chemicals injected into the packaging bag. Attached Figure Description

[0018] Figure 1 This is a front view of the packaging bag of this utility model;

[0019] Figure 2 This is a schematic diagram of the interface of this utility model;

[0020] Figure 3 This is a schematic diagram of the buckle of this utility model;

[0021] Figure 4 This is a schematic diagram of the buckle of this utility model from another angle;

[0022] Figure 5 This is a schematic diagram of the flow meter of this utility model;

[0023] Figure 6 This is another schematic diagram of the flow meter of this utility model;

[0024] Figure 7 This is a front view of the flow meter of this utility model;

[0025] Figure 8 This is a front view of the feed tube of this utility model;

[0026] Figure 9 This is an assembly drawing of the connecting parts of this utility model;

[0027] Figure 10 This is a schematic diagram of the installation of the connecting accessories and packaging bags of this utility model inside a rigid container.

[0028] In the diagram: 1. Packaging bag; 2. Interface; 2a. Base; 2b. Hollow connecting seat; 3. Buckle; 3a. Cover structure; 3b. Cylinder structure; 4. Flow meter; 4a. Annular wrapping cylinder; 4b. Connecting frame; 4c. Center plate; 4d. Round nozzle; 4e. Side flow hole; 4f. Center flow hole; 5. Card holder; 5a. Connecting section; 5b. Support section; 6. Rigid container; 7. Feed pipe. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0030] like Figure 1 As shown, a chemical packaging bag 1 has a volume of 19L / 40L / 220L. The packaging bag 1 of this utility model is used with accessories and can be used with a matching rigid container 4.

[0031] The packaging bag 1 includes an inner layer and an outer layer, with a gap between them to prevent them from sticking together, and the four edges of the inner and outer layers are fixed together.

[0032] The inner layer of the packaging bag 1 has a corrosion-resistant coating on the side that comes into contact with the chemicals. This coating prevents chemicals from seeping into and adhering to the inner layer of the packaging bag, allowing them to be completely discharged during unloading, achieving zero residue and saving chemicals. Furthermore, this coating is moisture- and oxygen-barrier, which is beneficial for the transportation and storage of chemicals, especially photoresist products.

[0033] like Figure 2-9 As shown, the accessories include an interface 2, a buckle 3, a flow meter 4, and an inlet pipe 7 and an outlet pipe with the same structure.

[0034] The interface 2 serves as the inlet and outlet for feeding and discharging the packaging bag, and is located at the top of the packaging bag; a buckle 3 is fitted on the outside of the interface 2; the flow meter 4 is fitted on the outside of the buckle; one end of the feed pipe or discharge pipe passes through the buckle 3 and the interface 2 respectively and extends into the bottom of the packaging bag 1, and the other end is connected to the flow meter; the flow meter 4 is provided with a flow hole of a certain size, the top of the flow hole is connected to the inlet of the feed pipe or discharge pipe, and the top is used to connect to the external conveying pipeline.

[0035] The interface 2 includes a base 2a that is pasted on the packaging bag 1, and a hollow connecting seat 2b on the base 2a for connecting a feed pipe or a discharge pipe. The packaging bag 1 has an opening at the position corresponding to the hollow connecting seat 2b, so that the feed pipe or discharge pipe can be inserted into the bottom of the packaging bag 1 through the interface 2.

[0036] The buckle 3 includes a circular cover structure 3a that fastens to the base 2a and has a central hole, and a circular cylindrical structure 3b extending upward from the hole; the hollow connecting seat 2b on the interface 2 passes through the cover structure and is fitted inside the cylindrical structure. Preferably, the outer diameter of the cylindrical structure is equal to the outer diameter of the base 2a. Preferably, the buckle 3 is composed of two symmetrically positioned units that fasten together.

[0037] The flow meter 4 includes an annular wrapping cylinder 4a and a flow body located at its center. The wrapping cylinder and the flow body are fixed together by multiple evenly distributed connecting brackets 4b. The top of the connecting brackets is provided with a central plate 4c, and the outer wall of the central plate is connected to the inner wall of the wrapping cylinder. The flow body includes a centrally located circular nozzle 4d of a certain length, and multiple side flow holes 4e are evenly distributed around the outer circumference of the circular nozzle. The side flow holes penetrate the central plate. The bottom of the circular nozzle is a through hole for connecting to the feed pipe 7 or the discharge pipe. The top of the circular nozzle is a blind hole, and multiple central flow holes 4f of equal size are opened on the end face of the blind hole.

[0038] The flow meter 4 is sleeved on the outside of the buckle 3, wherein the wrapping cylinder 4a is sleeved on the outside of the cylinder structure 3b of the buckle, and the top of the round nozzle 4d is used to connect to the external pipeline, and the bottom of the round nozzle 4d is located inside the hollow connecting seat 2b for connecting to the feed pipe 7 or the discharge pipe; since the diameter of the central flow hole 4f and the side flow hole 4e is fixed, the volume of chemicals passing through the flow meter per unit time is also determined. Therefore, the amount of chemicals entering the packaging bag can be obtained by controlling the input time of the chemicals.

[0039] Preferably, the annular wrapping cylinder 4a of the flow meter is provided with threads on the outside. When feeding and unloading are not required, a dust cover is provided on the outside of the flow meter. The dust cover is provided with internal threads that cooperate with the annular wrapping cylinder 4a.

[0040] One end of the feed pipe 7 and the discharge pipe is used to connect to the interface 2, and the other end is provided with a bracket 5 for connecting the flow meter.

[0041] The interface 2 also includes a sealing cap that is sealed to the connector. During the transportation of the packaging bag 1, the sealing cap can prevent chemicals from leaking out; when the packaging bag 1 is not in use, the sealing cap can prevent dust from entering.

[0042] The card holder 5 includes an integrally formed connecting section 5a and a supporting section 5b; the connecting section 5a is in the shape of a straight tube and is fitted inside the feed pipe and the discharge pipe; the supporting section 5b is fitted on the outside of the round nozzle; the outer diameter of the supporting section 5b is larger than the outer diameter of the connecting section 5a, and the two are connected by a rounded transition.

[0043] like Figure 10 As shown, the rigid container is a circular metal barrel, and its interior is divided into three independent chambers from top to bottom. The upper chamber and the middle chamber, as well as the middle chamber and the lower chamber, are separated by metal partitions. The upper partition between the upper chamber and the middle chamber has an opening for installing accessories. The middle chamber is used to place the packaging bag 1.

[0044] During feeding, the bottom of the feed pipe is inserted into the packaging bag, and the top of the feed pipe is connected to the fittings on the rigid container; during unloading, the feed pipe is removed, the bottom of the discharge pipe is inserted into the packaging bag, and the top is connected to the fittings, thereby realizing the input or output of chemicals.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A connecting fitting for a divided chemical packaging bag, characterized by: The interface is provided on the top of the packaging bag, and a buckle is sleeved outside the interface. The interface is provided on the top of the packaging bag, and a buckle is sleeved outside the interface.

2. The connecting fitting of the divided chemical packaging bag according to claim 1, wherein: The interface includes a base sealed on the packaging bag, a hollow connecting seat on the base for connecting the feeding pipe or the discharging pipe, and an opening on the packaging bag corresponding to the position of the hollow connecting seat.

3. The connecting fitting of the divided chemical packaging bag according to claim 2, wherein: The buckle includes a cover body structure clamped on the base and provided with a hole in the center of the base, and a cylinder structure extending upward from the hole.

4. The connecting fitting of the divided chemical packaging bag according to claim 1, wherein: The flowmeter includes an annular wrapping cylinder and a flow body provided at the center of the inside of the wrapping cylinder.

5. The connecting fitting of the divided chemical packaging bag according to claim 4, wherein: The flow body includes a circular nozzle arranged centrally and having a certain length, and a plurality of side flow holes uniformly arranged on the outer periphery of the circular nozzle.

6. The connecting fitting of the divided chemical packaging bag according to claim 5, wherein: The bottom of the circular nozzle is a through hole for connecting the feeding pipe or the discharging pipe.

7. The connecting fitting of the divided chemical packaging bag according to claim 5, wherein: The top of the circular nozzle is a blind hole, and a plurality of center flow holes with equal sizes are arranged on the end face of the blind hole.

8. The connecting fitting of the divided chemical packaging bag according to claim 5, wherein: The wrapping cylinder is sleeved outside the cylinder structure of the buckle, and the top of the circular nozzle is used for connecting the external pipeline, and the bottom of the circular nozzle is located inside the hollow connecting seat for connecting the feeding pipe or the discharging pipe.

9. The connecting fitting of the divided chemical packaging bag according to claim 5, wherein: The wrapping cylinder is provided with threads outside, a dust cover is arranged outside the flowmeter when the feeding and discharging are not needed, and the dust cover is provided with internal threads matched with the annular wrapping cylinder. One end of the feeding pipe and the discharging pipe is used for connecting the interface, and the other end is provided with a clamping seat for connecting the flowmeter. The clamping seat includes an integrally formed connecting section and a supporting section. The connecting section is in a straight pipe shape and is sleeved inside the feeding pipe and the discharging pipe. The supporting section is sleeved outside the circular nozzle.

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