CN115824534B - Leak detection piece and leak detection device of built-in gasbag spare - Google Patents
Leak detection piece and leak detection device of built-in gasbag spare Download PDFInfo
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Abstract
The invention relates to a leak detection part and a leak detection device with an air bag part arranged inside, comprising a sealing assembly, an extrusion assembly and a detection assembly, wherein the sealing assembly is connected with the extrusion assembly in a sliding way through a first air duct, and the extrusion assembly is connected with the detection assembly through a first connecting part. The whole detection device does not need an air storage tank, reduces the volume of detection equipment, is convenient to operate and reduces the cost; through detection component and extrusion subassembly, seal assembly combined action, form stable automatic leak hunting line, improved detection accuracy and detection speed, through setting up the distance of pushing down, need not to aerify etc. parameter, push down the operation in order to carry out the leak hunting and detect, also make things convenient for operating personnel to the understanding of equipment parameter when having improved the test repeatability.
Description
Technical Field
The invention relates to a leak detection part with an air bag part inside and a leak detection device.
Background
The prior leak detector for detecting the air tightness of the container is generally composed of a leak detection head, an air storage chamber, an air injection chamber, a motion control assembly, a chain plate assembly line and a frame. The leak detection machine drives the leak detection assembly to move through the motion control assembly, so that after the sealing effect is formed by the opening of the container on the assembly line of the sealing head cover on the leak detection assembly, a preset amount of gas is injected into the container through the gas injection chamber, the container forms certain gas pressure, and the gas pressure change in the container is detected through the gas pressure detection device.
The patent No. CN112284642A provides a leak detection device and a leak detection method, and an air supply pipeline is provided with an air charging air passage and a mixed air passage which are connected in parallel, so that helium filled into a container is uniformly distributed, and the detection precision is improved. The patent No. CN211527743U provides a plastic bottle embryo leak hunting production line, and fixture and inflation detection mechanism cooperate, have formed the automatic leak hunting of plastic bottle.
The existing container air tightness detection device needs to inflate the container every time, so that the detection device is required to be provided with an air storage tank, the equipment is large in size, high in manufacturing cost and using cost, low in detection speed and inconvenient to use, and the inflation amount of each time is different, so that the detection precision is low.
Disclosure of Invention
In order to solve the above problems, a first aspect of the present invention provides a leak detection member with an air bag inside, which includes a sealing assembly, an extrusion assembly and a detection assembly, wherein the sealing assembly is fixedly connected with the extrusion assembly through a first air duct, and the extrusion assembly is connected with the detection assembly through a first connecting portion.
As a preferred technical scheme of the invention, the sealing assembly comprises a sealing plug, a first connecting block and a second connecting block.
As a preferable technical scheme of the invention, the sealing plug, the first connecting block and the second connecting block are all cylinders, and the upper end of the first air duct sequentially penetrates through the circle center of the second connecting block, the circle center of the first connecting block and the circle center of the sealing plug from bottom to top; the first connecting block is fixedly connected with the sealing plug head, the first connecting block is movably connected with the first air duct through the sealing plug head, and the second connecting block is fixedly connected with the first air duct.
As a preferable technical scheme of the invention, a gap is arranged between the first connecting block and the second connecting block, the first connecting block and the second connecting block are not contacted in a non-extrusion state, and the lower surface of the first connecting block is contacted with the upper surface of the second connecting block in an extrusion state.
As a preferable technical scheme of the invention, the extrusion assembly comprises a compression part, an air cavity part and a protection part, wherein the compression part, the air cavity part and the protection part are arranged from top to bottom.
As a preferable technical scheme of the invention, the lower end of the first air duct is connected with the compression part and the air cavity part in sequence from top to bottom.
As a preferable embodiment of the present invention, the compression part includes a compression cylinder and a third connection block.
As a preferable technical scheme of the invention, the air cavity part is internally provided with an air bag part, and the air bag part comprises an air bag and a silica gel coating.
Preferably, the air bag is made of silica gel.
Preferably, the raw materials of the silica gel coating comprise 88-97 parts by weight of liquid silica gel, 1.8-2.4 parts by weight of adhesive, 0.5-1.2 parts by weight of cross-linking agent and 1-3 parts by weight of powder.
Further preferably, the liquid silica gel has a tensile strength of 4-5MPa, a tear resistance of 25-30KN/m at a thickness of 2.15mm, and a linear shrinkage of 0.2% or less.
In order to further improve the service life of the air bag piece and further reduce the maintenance of the later stage of the leak detection device, the applicant finds that the liquid silica gel with the tensile strength of 4-5MPa, the tear resistance of 2.15mm thickness of 25-30KN/m and the linear shrinkage rate of less than or equal to 0.2% is added into the silica gel coating coated on the surface of the air bag, so that the service life of the air bag piece can be prolonged to a certain extent, and the leak detection device can continuously work at the high temperature of 35 ℃ for a long time. This is probably due to the fact that the liquid silicone has specific pressure-retaining properties, tear strength and shrinkage, the viscosity of the coating can be improved, and when the airbag coated with the silicone coating expands and contracts in a high temperature environment, the stress system of the material changes and the strength increases.
Preferably, the binder is selected from one or more of vinyl MQ resin, methyl acrylate, hydroxypropyl methylcellulose.
Further preferred, the binder is a vinyl MQ resin, a methyl vinyl MQ resin, and methyl acrylate.
Still more preferably, the weight ratio of vinyl MQ resin, methyl vinyl MQ resin and methyl acrylate in the adhesive is 1.3:0.2:0.6.
preferably, M in the vinyl MQ resin: q is (0.5-1.3) 1, and vinyl content is 0.2-2wt%.
M: q means that the weight ratio of monofunctional Si-O units to tetrafunctional Si-O units in the vinyl MQ resin is (0.5-1.3): 1.
The added liquid silica gel is arranged on the surface of the air bag, so that the brittleness of the air bag is improved, the air bag cannot bear the detection of a low-temperature environment for a long time, and the surface of the air bag is easy to crack. To improve the above problems, the applicant obtained, through a great deal of thought and experimentation, modifications of the silica gel coating, additions of M: q is (0.5-1.3), 1, vinyl MQ resin with the vinyl content of 0.2-2wt% is mixed with methyl acrylate, so that the leak detection stability of the air bag piece at the low temperature of 2-5 ℃ can be improved, the air bag piece is not easy to crack, and the pressure maintaining performance and the tensile strength of the air bag piece can be improved, thereby improving the detection speed. The applicant speculates that the particular silicone system of the vinyl MQ resin affects the crosslinked network of the coating while improving the dispersion of the nanosilica in the crosslinked network, resulting in improved performance of the balloon member. In particular, the weight ratio of vinyl MQ resin, methyl vinyl MQ resin and methyl acrylate in the control adhesive was 1.3:0.2:0.6, the above effect is particularly remarkable.
Preferably, the cross-linking agent is a cage polysilsesquioxane and a vinyl terminated polysiloxane.
Further preferably, the weight ratio of cage polysilsesquioxane to vinyl terminated polysiloxane in the crosslinker is 0.45:0.3.
preferably, the powder is nanosilicon dioxide.
Preferably, the process of the silica gel coating is as follows: mixing the above materials, and stirring.
Preferably, the preparation process of the air bag part comprises the following steps: coating the silica gel coating on the outer surface of the air bag, wherein the glue coating amount is 72-83g/m < 2 >, and performing heat setting at 150-160 ℃ after coating.
In order to further improve the performance of the air bag piece, the applicant finds that optimizing the air bag piece preparation process, controlling the glue coating amount and performing heat setting at the temperature range of 150-160 ℃ not only enables the air bag piece to be more wear-resistant, but also improves the detection precision unexpectedly. In a certain temperature range, the distribution of cage polysilsesquioxane and vinyl-terminated polysiloxane is influenced in the thickness of a coating formed by a specific glue coating amount, and meanwhile, the agglomeration of inorganic powder particles is also influenced, so that the binding force of a silica gel coating and molecules on the surface of an airbag is enhanced, and the performance of the airbag is improved.
As a preferable technical scheme of the invention, a pressure sensor is arranged in the detection component.
Preferably, the detection assembly is further provided with a fourth connection block.
Working principle: the leak detection part with the built-in air bag part is pressed down, the sealing plug is propped against the periphery of the opening of the container to be detected, the opening of the container is sealed by the sealing plug, the inner cavity of the container, the extrusion assembly and the container enter a relatively high-pressure (relative to atmospheric pressure) state, the extrusion assembly is enabled to move by the gas in the container through the first gas guide pipe, the volume of the air bag part is compressed, the air pressure of the air bag part is changed, and after the air pressure is maintained for 0.5-1.5 seconds, the pressure sensor in the detection assembly reads the air bag part pressure.
The second aspect of the invention provides a leak detection device comprising a leak detection member with an air bag member built in, the leak detection device comprising a leak detection member with an air bag member built in, an automatic driving device and an analysis display device.
Preferably, the leak detection member of the built-in air bag member is detachably connected with the automatic driving device through a fourth connecting block.
Further preferably, the leak detection means comprises 4 identical leak detection members with built-in bladder members.
Preferably, the automated driving device is fixedly connected with the analysis display device.
Working principle: the automatic driving device drives the leak detection pieces of the four built-in air bag pieces to simultaneously push down for working according to the parameters of the push-down distance of the analysis display equipment, performs air leakage detection on the container, and displays the detected air pressure on the analysis display equipment.
Compared with the prior art, the invention has the following beneficial effects:
the whole detection device does not need an air storage tank, reduces the volume of detection equipment, is convenient to operate and reduces the cost; through detection component and extrusion subassembly, seal assembly combined action, form stable automatic leak hunting line, improved detection accuracy and detection speed, through setting up the distance of pushing down, need not to aerify etc. parameter, push down the operation in order to carry out the leak hunting and detect, also make things convenient for operating personnel to the understanding of equipment parameter when having improved the test repeatability. The liquid silica gel with the tensile strength of 4-5MPa, the tear resistance of 2.15mm thickness of 25-30KN/m and the linear shrinkage rate of less than or equal to 0.2% is added into the silica gel coating coated on the surface of the air bag, so that the service life of the air bag piece can be prolonged to a certain extent, and the leak detection device can continuously work at the high temperature of 35 ℃ for a long time; modifying the silica gel coating, and adding M: q is (0.5-1.3), 1, vinyl MQ resin with the vinyl content of 0.2-2wt% is mixed with methyl acrylate, so that the leak detection stability of the air bag piece at the low temperature of 2-5 ℃ can be improved, the air bag piece is not easy to crack, and the pressure maintaining performance and the tensile strength of the air bag piece can be improved, thereby improving the detection speed. The preparation process of the air bag piece is optimized, the glue coating amount is controlled, and the air bag piece is subjected to heat setting at the temperature range of 150-160 ℃, so that the air bag piece is more wear-resistant, the detection precision is also unexpectedly improved, and particularly, the leak detection container is made of plastic materials such as PET, PP, PE.
Drawings
Fig. 1 is a schematic structural view of a leak detection member of the built-in air bag member of embodiment 1.
Fig. 2 is a schematic structural diagram of a leak detection device including a leak detection member with an air bag member built in embodiment 1.
In the figure: the device comprises a 1-sealing component, a 2-extrusion component, a 3-detection component, a 4-first air duct, a 5-first connecting part, a 6-sealing plug, a 7-first connecting block, an 8-second connecting block, a 9-compression cylinder, a 10-third connecting block, an 11-air cavity part, a 12-protection part, a 13-fourth connecting block, a 14-automatic driving device, a 15-leak detection part with an air bag part inside and a 16-analysis display device.
Detailed Description
Examples
The raw materials for preparing the composition in the examples are all commercially available, wherein the air bag is purchased from Hengshui Cangzhi rubber and plastic products Co., ltd., and is made of silica gel, the liquid silica gel is purchased from Shenzhen red leaves, the model is HY-4140, the tensile strength is 4.21MPa, the tear resistance of 2.15mm thickness is 27KN/m, the linear shrinkage rate is less than or equal to 0.1%, and the vinyl MQ resin is purchased from long Cheng Sihai, model 5202N, M: q is (0.6-0.9): 1, vinyl content is 0.5-1.5wt%, methyl vinyl MQ resin is purchased from Long Cheng Sihai, model 5201N, methyl acrylate is purchased from Xinjiao, CAS number of cage polysilsesquioxane is 68611-45-0, vinyl-terminated polysiloxane is cloned into the four seas, model SH-205, nano silicon dioxide is purchased from Nanjing Baacket New Material Co.
Example 1
The embodiment provides a leak hunting piece of built-in gasbag spare, like fig. 1, including seal assembly 1, extrusion subassembly 2 and detection subassembly 3, seal assembly 1 is through first air duct 4 and extrusion subassembly 2 fixed connection, and extrusion subassembly 2 and detection subassembly 3 are through first connecting portion 5 connection.
The sealing assembly 1 comprises a sealing plug 6, a first connection block 7 and a second connection block 8.
The sealing plug 6, the first connecting block 7 and the second connecting block 8 are all cylinders, and the upper end of the first air duct 4 sequentially penetrates through the circle center of the second connecting block 8, the circle center of the first connecting block 7 and the circle center of the sealing plug 6 from bottom to top; the first connecting block 7 is fixedly connected with the sealing plug 6, the first connecting block 7 is movably connected with the sealing plug 6 and the first air duct 4, and the second connecting block 8 is fixedly connected with the first air duct 4.
A gap is provided between the first connection block 7 and the second connection block 8, and the first connection block 7 and the second connection block 8 are not in contact in a non-extrusion state, and in an extrusion state, the lower face of the first connection block 7 is in contact with the upper face of the second connection block 8.
The pressing assembly includes a compression portion, an air chamber portion 11, and a protection portion 12, the compression portion, the air chamber portion 11, and the protection portion 12 being arranged from top to bottom.
The lower end of the first air duct 4 is connected with the compression part and the air cavity part 11 in sequence from top to bottom.
The compression section comprises a compression cylinder 9 and a third connection block 10.
An air bag member is arranged in the air cavity part 11, and comprises an air bag and a silica gel coating.
The raw materials of the silica gel coating comprise 95.5 parts by weight of liquid silica gel, 2.1 parts by weight of adhesive, 0.75 part by weight of cross-linking agent and 1.65 parts by weight of powder.
The binder is vinyl MQ resin, methyl vinyl MQ resin and methyl acrylate. In the adhesive, the weight ratio of the vinyl MQ resin to the methyl acrylate is 1.3:0.2:0.6.
the cross-linking agent is cage polysilsesquioxane and vinyl-terminated polysiloxane. In the cross-linking agent, the weight ratio of the cage polysilsesquioxane to the vinyl-terminated polysiloxane is 0.45:0.3.
the powder is nano silicon dioxide.
The process of the silica gel coating comprises the following steps: mixing the above materials, and stirring.
The preparation process of the air bag part comprises the following steps: and (3) coating a silica gel coating on the outer surface of the air bag, wherein the coating amount is 77g/m < 2 >, and performing heat setting at 157 ℃ after coating.
A pressure sensor is arranged in the detection assembly 3.
The detection assembly 3 is further provided with a fourth connection block 13.
The embodiment of the invention also provides a leak detection device comprising the leak detection piece with the built-in air bag piece, as shown in fig. 2, wherein the leak detection device comprises the leak detection piece 15 with the built-in air bag piece, an automatic driving device 14 and an analysis display device 16.
The leak detection member 15 with the built-in air bag member and the automatic driving device 14 are detachably connected through the fourth connection block 13. The leak detection device comprises 4 identical leak detection members 15 with built-in air bag members.
The automation drive 14 is fixedly connected to the analysis display device 16.
Example 2
The present example provides a leak detection member with an air bag member built in, which is different from example 1 in that the manufacturing process of the air bag member is: coating the silica gel coating on the outer surface of the air bag, wherein the coating amount is 73g/m < 2 >, and performing heat setting at 150 ℃ after coating.
The present example also provides a leak detection device including a leak detection member with an air bag member built in, as in example 1.
Example 3
This example provides a leak-detecting member with an air bag member built in, unlike example 1, the raw material of the silicone coating layer includes 135 parts by weight of liquid silicone, 2 parts by weight of adhesive, 1 part by weight of crosslinking agent, 2 parts by weight of powder.
The present example also provides a leak detection device including a leak detection member with an air bag member built in, as in example 1.
Example 4
This example provides a leak-testing member incorporating an air bag member, unlike example 1, the adhesive is a vinyl MQ resin, a methyl vinyl MQ resin, and methyl acrylate. In the adhesive, the weight ratio of the vinyl MQ resin to the methyl acrylate is 1:0.7:0.4.
the present example also provides a leak detection device including a leak detection member with an air bag member built in, as in example 1.
Example 5
This example provides a leak detector with an air bag member built in, unlike example 1, the adhesive is vinyl MQ resin, methyl vinyl MQ resin. In the adhesive, the weight ratio of the vinyl MQ resin to the methyl vinyl MQ resin is 1.5:0.5.
the present example also provides a leak detection device including a leak detection member with an air bag member built in, as in example 1.
Example 6
The present example provides a leak detection member with an air bag member built in, which is different from example 1 in that the manufacturing process of the air bag member is: coating the silica gel coating on the outer surface of the air bag, wherein the coating amount is 85g/m < 2 >, and performing heat setting at 160 ℃ after coating.
The present example also provides a leak detection device including a leak detection member with an air bag member built in, as in example 1.
Performance test:
1. and (3) testing the mechanical properties of the air bag part: the air bag members obtained in examples 1 to 6 were tested for pressure retention according to astm d7559, the initial pressure was set at 76KPa, the air bag member was inflated, the pressure peak was recorded as V1 when it reached a plateau, the inflation was stopped, the pressure V2 of the gas in the air bag member after 10S was measured, the pressure retention was calculated from (V1-V2)/v1×100, and the tensile strength of the air bag members obtained in examples 1 to 6 was tested according to GB/T528-1998, and the results were shown in table 1:
TABLE 1
2. Abrasion resistance test: the abrasion resistance times of the airbag parts obtained in examples 1 to 6 were tested according to ISO5981, and the results are shown in Table 2:
TABLE 2
3. Leak detection stability test: the pressure values obtained by the pressure sensor test when the leak detection devices of example 1 and examples 3 to 6 were used to test the plastic containers for leak detection, and the leak detection test was performed again on the same containers after the leak detection devices were continuously operated at 35 ℃ and 4 ℃ for 8 hours, respectively, and the appearance of the air bag member was observed, and the results are shown in table 3:
TABLE 3 Table 3
Claims (7)
1. The leak detection piece with the built-in air bag piece is characterized by comprising a sealing component, an extrusion component and a detection component, wherein the sealing component is fixedly connected with the extrusion component through a first air duct, and the extrusion component is connected with the detection component through a first connecting part; the extrusion assembly comprises an air cavity part, an air bag piece is arranged in the air cavity part, and the air bag piece comprises an air bag and a silica gel coating; a pressure sensor is arranged in the detection assembly;
the sealing assembly comprises a sealing plug, a first connecting block and a second connecting block;
the sealing plug, the first connecting block and the second connecting block are all cylinders, and the upper end of the first air duct sequentially penetrates through the circle center of the second connecting block, the circle center of the first connecting block and the circle center of the sealing plug from bottom to top; the first connecting block is fixedly connected with the sealing plug head, the first connecting block and the sealing plug head are movably connected with the first air duct, and the second connecting block is fixedly connected with the first air duct;
the raw materials of the silica gel coating comprise 88-97 parts by weight of liquid silica gel, 1.8-2.4 parts by weight of adhesive, 0.5-1.2 parts by weight of cross-linking agent and 1-3 parts by weight of powder; the tensile strength of the liquid silica gel is 4-5MPa, the tearing strength of the liquid silica gel with the thickness of 2.15mm is 25-30KN/m, and the linear shrinkage rate is less than or equal to 0.2%; the adhesive is vinyl MQ resin, methyl vinyl MQ resin and methyl acrylate, and the weight ratio is 1.3:0.2:0.6; m in vinyl MQ resin: q is (0.5-1.3) 1, vinyl content is 0.2-2wt%; the cross-linking agent is cage polysilsesquioxane and vinyl-terminated polysiloxane;
the preparation process of the air bag part comprises the following steps: coating silica gel coating on the outer surface of the air bag, wherein the coating amount is 72-83g/m 2 And (5) performing heat setting at 150-160 ℃ after coating is finished, and obtaining the coating.
2. The leakage detecting member for built-in air bag member according to claim 1, wherein a gap is provided between the first connection block and the second connection block, the first connection block and the second connection block are not in contact in a non-pressed state, and in a pressed state, a lower face of the first connection block is in contact with an upper face of the second connection block.
3. The leak detector of claim 1, wherein the squeeze assembly further comprises a compression portion and a protection portion.
4. A leak detector for a built-in air bag member according to claim 3, wherein said compression portion, air chamber portion and protection portion are arranged from top to bottom.
5. The leak detection member for a built-in air bag member according to claim 3, wherein the lower end of said first air duct is connected to said compression portion and said air chamber portion in this order from top to bottom.
6. The leak detection member for an air bag built-in member according to claim 3 or 4, wherein said compression portion includes a compression cylinder and a third connection block.
7. A leak detection apparatus comprising a leak detection member incorporating an air bag member as claimed in any one of claims 1 to 6, wherein the leak detection apparatus comprises a leak detection member incorporating an air bag member, an automated driving device and an analysis display device.
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| CN202310138423.9A CN115824534B (en) | 2023-02-20 | 2023-02-20 | Leak detection piece and leak detection device of built-in gasbag spare |
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| CN115824534B true CN115824534B (en) | 2023-06-06 |
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| CN102582566A (en) * | 2012-03-22 | 2012-07-18 | 华懋（厦门）新材料科技股份有限公司 | One-step formed curtain airbag |
| CN103756561B (en) * | 2013-12-26 | 2016-02-24 | 惠州市永卓科技有限公司 | A kind of Novel automobile safety airbag coating silica gel material and preparation method thereof |
| CN103740274B (en) * | 2013-12-26 | 2016-02-24 | 惠州市永卓科技有限公司 | A kind of car safety air bag coated material and preparation method thereof |
| CN113432811A (en) * | 2021-06-17 | 2021-09-24 | 中山市台森机电设备有限公司 | Leak hunting subassembly and contain its leak hunting machine |
| CN215677473U (en) * | 2021-06-17 | 2022-01-28 | 广东台森智能装备有限公司 | Leak hunting subassembly and contain its leak hunting machine |
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Denomination of invention: A leak detection component and device with built-in airbag components Effective date of registration: 20230628 Granted publication date: 20230606 Pledgee: Bank of China Limited Suzhou Xiangcheng sub branch Pledgor: YUZHEN AUTOMATION TECHNOLOGY (SUZHOU) CO.,LTD. Registration number: Y2023980046459 |
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