Air tightness detection device for soft bag welding quality detection

Abstract

The invention discloses an air tightness detection device for soft bag welding quality detection, relates to the technical field of detection devices, and solves the technical problem that a device for detecting the air tightness of a soft bag is lacked in the prior art, the air tightness detection device comprises the soft bag, a protection device and an inflation probe, the protection device is arranged outside the soft bag and is used for preventing the soft bag from bursting and scattering, and the inflation probe is arranged outside the soft bag. The inflation probe is used for being inserted into the soft bag to inflate the soft bag, and the inflation probe is connected with an air source through a pipeline; the purpose of detecting the sealing performance of the soft bag is achieved, the structure is simple, testing operation is convenient, the soft bag can be prevented from bursting and scattering, and the device is suitable for detecting various different soft bags.

Description

Technical Field

[0001] The invention relates to the technical field of detection devices, and in particular to an airtightness detection device for detecting the welding quality of a soft bag. Background Art

[0002] At present, domestic and foreign multi-layer co-extruded infusion bags are gradually replacing traditional glass bottles for infusion with their unique advantages of light weight, convenient carrying and use, and easy degradation, and are competing with stand-up plastic infusion containers. However, the biggest quality problem of soft bag infusion is the leakage during its production, transportation, and terminal use. How to effectively prevent defective products manufactured at the front end from entering the market and ensure the quality of bag making is a problem faced by every manufacturer.

[0003] In order to ensure product quality, it is necessary to test the welding strength of the bag body to ensure that the air tightness of the soft bag meets the requirements and to determine whether there is any loose welding around the soft bag. Based on this, an air tightness detection device for soft bag welding quality detection is now provided. Summary of the invention

[0004] The present invention aims to solve the technical problem that the prior art lacks a device for airtightness detection of the welding quality of soft bags. The present invention aims to provide an airtightness detection device for the welding quality detection of soft bags, which achieves the purpose of detecting the sealing of soft bags. The device has a simple structure and convenient test operation, and can prevent the soft bags from bursting and scattering. The device is suitable for detecting a variety of different soft bags.

[0005] The present invention is achieved through the following technical solutions:

[0006] An air tightness detection device for detecting the welding quality of a soft bag, comprising:

[0007] Soft bags;

[0008] A protective device, which is provided on the outside of the soft bag and is used to prevent the soft bag and its plastic components from bursting and scattering during the inspection process; and

[0009] The inflation probe is used to be inserted into the soft bag to inflate the soft bag, and the inflation probe is connected to the air source through a pipeline.

[0010] Furthermore, the soft bag includes a bag body, a first interface and a second interface, and the inflation probe is inserted into the soft bag through the first interface or the second interface.

[0011] Furthermore, the first interface is provided with a sealing rubber plug, and the second interface is provided with a medicine plug.

[0012] Furthermore, the protective device includes an upper parallel plate and a lower parallel plate connected as one body, and the soft bag is arranged in a gap between the upper parallel plate and the lower parallel plate.

[0013] Furthermore, the upper parallel plate and the lower parallel plate are connected via a spacing adjustment device.

[0014] Furthermore, the spacing adjustment device includes an adjusting bolt and an adjusting nut.

[0015] Furthermore, the inflation probe is connected to a compressed air storage tank through a pipeline.

[0016] Furthermore, a pressure reducing valve and a solenoid valve are provided on the pipeline connecting the inflation probe and the air source.

[0017] Furthermore, the solenoid valve is electrically connected to a relay.

[0018] Furthermore, the pressure reducing valve, solenoid valve and relay are all electrically connected to the detection control box.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] 1. The present invention can be used to prevent the soft bag and its plastic components from bursting and scattering during the detection process by arranging a protective device on the outside of the soft bag. The soft bag is arranged in the gap between the upper parallel plate and the lower parallel plate of the protective device. The soft bag is protected by arranging the upper and lower parallel plates. If the soft bag bursts under pressure, its bursting state can be suppressed, thereby avoiding the bursting and scattering of the bag body due to excessive pressure during the detection process, which may cause harm to personnel.

[0021] 2. The present invention provides a spacing adjustment device between the upper parallel plate and the lower parallel plate, wherein the spacing adjustment device includes an adjusting bolt and an adjusting nut. For different soft bags, it may be necessary to fine-tune the spacing between the upper and lower parallel plates. During adjustment, the spacing between the upper parallel plate and the lower parallel plate is adjusted by adjusting the adjusting bolt and the adjusting nut, so as to be suitable for testing a variety of different soft bags.

[0022] 3. The device of the present invention has a simple structure and convenient test operation. It is used to input compressed air into the soft bag to be tested, and maintain a stable pressure until the set test time is over, so as to detect the welding effect of the soft bag when it is subjected to the set pressure, thereby achieving the purpose of testing the sealing of the soft bag. By designing different test pressures and times, the inspection and precise control of the welding quality of the soft bag can be achieved, thereby ensuring the quality of bag making in the production facilities and reducing the defective rate of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0024] Figure 1It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the protective device;

[0026] Figure 3 is a side view of the protective device;

[0027] Figure 4 It is a schematic diagram of the structure of a soft bag.

[0028] Marks and corresponding parts names in the attached drawings:

[0029] 1-protective device, 101-upper parallel plate, 102-lower parallel plate, 2-distance adjusting device, 201-adjusting bolt, 202-adjusting nut, 3-soft bag, 301-bag body, 302-first interface, 303-sealing rubber plug, 304-second interface, 305-medicine plug, 4-inflating probe, 5-pressure reducing valve, 6-solenoid valve, 7-relay, 8-detection control box, 9-compressed air storage tank. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary implementation modes of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0031] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to one of ordinary skill in the art that these specific details are not necessarily employed to practice the present invention. In other embodiments, in order to avoid obscuring the present invention, well-known structures, circuits, materials, or methods are not specifically described.

[0032] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] In the description of the present invention, the indicated orientation or position relationship is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] Meanwhile, the terms "set", "assemble", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example

[0036] This embodiment provides an airtightness detection device for detecting the welding quality of a soft bag, such as Figure 1-Figure 4 As shown, it includes a soft bag 3, a protective device 1 and an inflation probe 4.

[0037] The soft bag 3 includes a bag body 301, a first interface 302 and a second interface 304. The inflation probe 4 is inserted into the soft bag 3 through the first interface 302 or the second interface 304. The first interface 302 is provided with a sealing rubber plug 303, and the second interface 304 is provided with a medicine plug 305. The soft bag 3 can be an infusion bag or a dialysis bag of different structural forms, including a three-layer co-extruded infusion film bag, a three-layer co-extruded infusion double-chamber bag, a three-layer co-extruded infusion three-chamber bag, a five-layer co-extruded infusion film bag, a peritoneal dialysis bag, etc. Figure 4 As shown, the inflation probe 4 is inserted into the soft bag 3 through the sealing rubber plug 303 of the first interface 302 to inflate the soft bag 3 .

[0038] The protective device 1 is arranged outside the soft bag 3 to prevent the soft bag 3 and its plastic components from bursting and scattering during the detection process. Figure 2 and 3 As shown, the protection device 1 includes an upper parallel plate 101 and a lower parallel plate 102 connected as one body, and the soft bag 3 is arranged in the gap between the upper parallel plate 101 and the lower parallel plate 102. The soft bag 3 is protected by arranging the upper and lower parallel plates. If the soft bag 3 bursts under pressure, its burst state can be suppressed, so as to avoid the bag body 301 bursting and scattering due to excessive pressure during the detection process, causing harm to personnel.

[0039] As a preferred implementation mode, Figure 2As shown, the upper parallel plate 101 and the lower parallel plate 102 are connected by a spacing adjustment device 2, and the spacing adjustment device 2 includes an adjustment bolt 201 and an adjustment nut 202. For different soft bags 3, there may be a need to fine-tune the spacing between the upper and lower parallel plates. During the adjustment, the spacing between the upper parallel plate 101 and the lower parallel plate 102 is adjusted by adjusting the adjustment bolt 201 and the adjustment nut 202, so as to be suitable for testing a variety of different soft bags 3.

[0040] The inflation probe 4 is used to be inserted into the soft bag 3 to inflate the soft bag 3. The inflation probe 4 is connected to the gas source through a pipeline. The gas source is compressed air. The inflation probe 4 is connected to the compressed air storage tank 9 through the pipeline. The pipeline connecting the inflation probe 4 and the gas source is provided with a pressure reducing valve 5 and a solenoid valve 6. The solenoid valve 6 is electrically connected to the relay 7. The pressure reducing valve 5, the solenoid valve 6 and the relay 7 are all electrically connected to the detection control box 8. By setting the pressure reducing valve 5, the gas pressure input into the soft bag 3 is controlled, by setting the solenoid valve 6, it is used to control the air intake and air shutoff, and by setting the relay 7, it is used to set the detection time parameters.

[0041] The device of the present invention has a simple structure and convenient test operation. It is used to input compressed air into the soft bag 3 to be tested, and maintain a stable pressure until the set test time is over, so as to detect the welding effect of the soft bag 3 when it is subjected to the set pressure, thereby achieving the purpose of detecting the sealing of the soft bag 3. By designing different test pressures and times, the inspection and precise control of the welding quality of the soft bag 3 are realized, thereby ensuring the quality of bag making in the production facilities and reducing the defective rate of products.

[0042] When testing the bag body 301, the inflation probe 4 is inserted into the soft bag 3 through the sealing plug 303, and the other interface of the soft bag 3 is sealed with a medicine plug 305. Then, the bag body 301 to be tested is placed between the upper parallel plate 101 and the lower parallel plate 102, and the knob of the pressure reducing valve 5 is adjusted to control the gas pressure input into the bag body 301. The time parameter of the relay 7 is adjusted to set the time to 30 seconds, and the bag body 301 is controlled to reach a set pressure of 0.15 MPa, which is maintained for 30 seconds. After the test is completed, the pressure is released to complete the test.

[0043] During the inspection, if the welding strength of the bag body 301 under inspection is insufficient and it is a defective product, that is, the welding around the soft bag 3 is not strong, then the place will burst due to the inability to withstand the test air pressure, and a strong popping sound will occur. After this phenomenon occurs, the air intake solenoid valve 6 can be closed and the defective sample can be taken out. If the welding around the bag body 301 does not burst under the set pressure / time conditions, and the cracking amplitude is small, it means that the welding strength of the bag body 301 meets the requirements and the product quality is guaranteed.

[0044] Finally, it should be noted that the above specific embodiments are only used to explain in detail the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific implementation method of the present invention and is not used to limit the protection scope of the present invention. Although the present invention is described in detail with reference to the above specific embodiments, ordinary technicians in this field should understand that it is still possible to modify the technical solutions recorded in the above embodiments, or to replace or improve some or all of the technical features therein. These modifications, equivalent replacements and improvements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. An airtightness detection device for soft bag welding quality detection, characterized in that: include: Soft bags (3); A protective device (1) is arranged outside the soft bag (3) and is used to prevent the soft bag (3) and its plastic components from bursting and scattering during the detection process; and The inflation probe (4) is used to be inserted into the soft bag (3) to inflate the soft bag (3), and the inflation probe (4) is connected to the air source through a pipeline.

2. The air tightness detection device for soft bag welding quality detection according to claim 1 is characterized in that: The soft bag (3) comprises a bag body (301), a first interface (302) and a second interface (304), and the inflation probe (4) is inserted into the interior of the soft bag (3) through the first interface (302) or the second interface (304).

3. The air tightness detection device for soft bag welding quality detection according to claim 2, characterized in that: The first interface (302) is provided with a sealing rubber plug (303), and the second interface (304) is provided with a medicine plug (305).

4. The air tightness detection device for soft bag welding quality detection according to claim 1, characterized in that: The protective device (1) comprises an upper parallel plate (101) and a lower parallel plate (102) which are connected as one body, and the soft bag (3) is arranged in the gap between the upper parallel plate (101) and the lower parallel plate (102).

5. The air tightness detection device for soft bag welding quality detection according to claim 4, characterized in that: The upper parallel plate (101) and the lower parallel plate (102) are connected via a spacing adjustment device (2).

6. The air tightness detection device for soft bag welding quality detection according to claim 5, characterized in that: The spacing adjustment device (2) comprises an adjustment bolt (201) and an adjustment nut (202).

7. The air tightness detection device for soft bag welding quality detection according to claim 1, characterized in that: The inflation probe (4) is connected to the compressed air storage tank (9) via a pipeline.

8. An airtightness detection device for detecting the welding quality of a soft bag according to any one of claims 1 to 7, characterized in that: A pressure reducing valve (5) and a solenoid valve (6) are provided on the pipeline connecting the inflation probe (4) and the gas source.

9. The air tightness detection device for soft bag welding quality detection according to claim 8, characterized in that: The solenoid valve (6) is electrically connected to the relay (7).

10. The air tightness detection device for soft bag welding quality detection according to claim 9, characterized in that: The pressure reducing valve (5), the solenoid valve (6) and the relay (7) are all electrically connected to the detection control box (8).

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