Micro-bleed on-line sampling device
By adjusting the gas collection hole using a split-type gas collection device, the problem of inaccurate detection caused by differences in aerosol models and specifications is solved, enabling accurate measurement of micro-leakage of aerosols and avoiding false detections.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU YOUHAOJIA INTELLIGENT EQUIPMENT TECHNOLOGY CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-06-19
AI Technical Summary
Existing online micro-leakage detection devices for aerosols cannot adapt to different models and specifications of aerosols, resulting in inaccurate leak detection results, especially prone to false detections under strict EU standards.
Design a split-type gas collection device with adjustable number and position of gas collecting holes. By rotating the gas collecting block, the opening and closing of gas collecting holes at a specific height can be controlled, collecting gas samples only from specific locations and improving detection accuracy.
It enables accurate leak detection of aerosols of different models and specifications, avoids false detections caused by insufficient gas concentration in the sample, and meets the testing requirements of EU standards.
Smart Images
Figure CN224382901U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of aerosol detection equipment, specifically relating to the improvement of an online sampling device for micro-leakage of aerosols. Background Technology
[0002] Aerosols are formulations in which the propellant and active ingredient are sealed together in a pressure-resistant container. During use, the valve is opened, allowing part of the propellant and contents to be sprayed out of the container. The propellant rapidly vaporizes, while the active ingredient forms extremely fine droplets in the air. Since its invention in 1927, aerosols have been widely used in industries such as daily chemicals, industry, automobiles, pharmaceuticals, fire protection, and building materials due to their unique advantages such as rapid action, precise targeting, and stable formulation.
[0003] To maintain pressure within the canister, aerosol products often require a certain amount of propellant in their formulation. In the past, chlorofluorocarbons (CFCs) were most commonly used, but with the implementation of the Montreal Protocol in 1989, CFCs were gradually replaced due to their severe negative impact on the ozone layer. Common alternatives include propane and n-butane. Propane and butane are flammable and explosive; if the canister is not completely sealed during filling, the propellant may leak slowly. Although this leakage is often extremely small, in warehousing and long-distance transoceanic container transport, the accumulated leakage from densely stored aerosol canisters can potentially form an explosive gas mixture within hours, posing a significant safety risk. Therefore, to reduce the possibility of explosions during warehousing and transportation of aerosol products, my country has issued the QB25492002 standard, requiring finished aerosol products to pass a 50°C constant temperature water bath test. The European Union has enacted Directive 75324 EEC, requiring that products that fail leak testing or have visible damage to their packaging cannot be sold.
[0004] The working principle of the micro-leakage online detection equipment is to use a focused laser beam to pass through the sample gas via QCL spectroscopy trace gas detection method to achieve efficient detection of micro-leakage of aerosol propellants. Using the trace gas concentration data obtained by the QCL leak detection unit, real-time data analysis is used to provide feedback and optimize process parameters such as sealing and filling, achieving intelligent control of the entire production line. The micro-leakage online sampling device is an important component of the micro-leakage online detection equipment. The aerosol being tested travels in a straight line on a conveyor belt. When it reaches the detection position, vertically placed gas collecting shafts are installed on both sides of the aerosol being tested. These collecting shafts have negative pressure holes to collect gas samples, which are then sent to a specialized gas detection device.
[0005] In practice, the following problems exist: Due to the varying models and specifications of aerosols, the height of the valve position and the height of the leak point also differ. Therefore, to ensure that all aerosol models and specifications can be tested, the sampling collection shaft is made into a relatively tall gantry type, with several collection holes arranged from top to bottom on the inner side of the gantry. For an aerosol at a specific height, the collection point on the inner side of the gantry that corresponds to the valve position height will collect the leaking gas, while the other collection holes will draw in a significant amount of gas from unnecessary locations. After converging in a main pipeline, this reduces the concentration of the leaking gas in the sampled gas, making the leak detection results inaccurate. Given the stringent EU requirement of one bubble leak every 5 seconds, this approach is crucial to avoid false detections due to insufficient sampled gas concentration.
[0006] Therefore, designing an online sampling device that can be adapted to various specifications and models of aerosols and improving the sampling concentration has become an urgent problem to be solved by those skilled in the art. Utility Model Content
[0007] To address the above technical problems, this utility model provides an online micro-leakage sampling device that can adjust the number and position of the gas collecting holes according to the model and specifications of the aerosol, thereby achieving accurate measurement of micro-leakage.
[0008] The technical solution of this utility model is: a micro-leakage online sampling device, including an outlet pipe, the outlet pipe being connected to the sampling port of a gas detection device, and also including at least one set of gas collection devices;
[0009] The gas collection device includes a base, a gas collection shaft, a connecting component, and several gas collection blocks sleeved outside the gas collection shaft.
[0010] The base is fixedly connected to the frame, and the gas collecting shaft is vertically connected to the base;
[0011] The gas collecting shaft has an axial gas collecting groove on the side facing the object to be measured; the gas collecting block has a central hole adapted to the gas collecting shaft, and a gas collecting hole is formed on one surface of the gas collecting block, the gas collecting hole communicating with the central hole;
[0012] The adapter is provided with an air passage, which connects the air collection groove of the air collection shaft and the air outlet pipe.
[0013] Preferably, among the several gas collecting blocks fitted on the gas collecting shaft, the gas collecting hole of the gas collecting block that is adapted to the object to be tested faces inward, and the remaining gas collecting blocks are rotated 90-270° to disconnect from the gas collecting groove on the gas collecting shaft.
[0014] Preferably, the uppermost gas collecting block is connected to the adapter, and a nut is threaded onto the gas collecting shaft on the lower side of the bottommost gas collecting block. The nut is tightly fitted to the bottommost gas collecting block to fix the gas collecting blocks together.
[0015] Preferably, the upper part of the central hole is provided with a countersunk hole, the lower part of the central hole is provided with a boss adapted to the countersunk hole, and the lower part of the adapter is provided with a boss adapted to the countersunk hole.
[0016] Preferably, the top surface of the gas collecting block is provided with four positioning pin holes, the bottom surface of the gas collecting block is provided with two matching positioning spring beads, and the bottom surface of the adapter is also provided with two matching positioning spring beads.
[0017] Preferably, a sealing ring is provided between the adapter and the gas collecting shaft.
[0018] Preferably, it includes two sets of gas collection devices, and the gas outlet pipe is a three-way pipe.
[0019] This utility model ingeniously improves the gantry body from an integral structure to a split structure in which the gas collecting shaft is sleeved with several gas collecting blocks. By rotating the gas collecting blocks, the opening and closing of the gas collecting holes can be controlled, thereby controlling the opening and closing of the gas collecting holes at a specific height. The opening and closing of the corresponding gas collecting holes can be adjusted according to the actual height of the aerosol (gas valve position), so that only the gas at a specific position is collected.
[0020] This invention redesigns the original one-piece gas collection block into a separate unit, avoiding the collection of too much unnecessary sampled gas and significantly improving the accuracy of leak detection. Attached Figure Description
[0021] Figure 1 This is a perspective view of Embodiment 1 of the present invention.
[0022] Figure 2 This is a three-dimensional schematic diagram of Embodiment 1 of this utility model from another angle.
[0023] Figure 3 This is a schematic diagram of the gas collecting shaft in Embodiment 1 of this utility model.
[0024] Figure 4 This is a bottom-view sectional view of Embodiment 1 of this utility model with the gas collecting block in the open state.
[0025] Figure 5 This is a bottom-view sectional view of the gas collecting block in the closed state according to Embodiment 1 of this utility model.
[0026] Figure 6 This is a schematic diagram of the mounting block in Embodiment 1 of this utility model.
[0027] Figure 7 This is a schematic diagram of the structure of the adapter block in Embodiment 1 of this utility model.
[0028] Figure 8 This is a schematic diagram of the gas collecting block in Embodiment 1 of this utility model.
[0029] Figure 9 This is an application diagram of Embodiment 1 of this utility model.
[0030] Figure 10 This is a schematic diagram of the top surface structure of the gas collecting block in Embodiment 2 of this utility model.
[0031] Figure 11 This is a schematic diagram of the bottom structure of the gas collecting block in Embodiment 2 of this utility model.
[0032] In the diagram, 1 is the gas outlet pipe, 2 is the gas collecting shaft, 21 is the gas collecting groove, 22 is the thread, 23 is the connecting column, 3 is the mounting part, 31 is the mounting hole, 4 is the adapter, 5 is the nut, 6 is the gas collecting block, 61 is the gas collecting hole, 62 is the positioning pin hole, 63 is the positioning spring ball, 7 is the gas detection device, and 8 is the aerosol delivery equipment. Detailed Implementation
[0033] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0034] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "inner", "outer", "front", "back", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0035] Example 1
[0036] Figures 1 to 8 The device in the middle is a micro-leakage online sampling device, including an outlet pipe 1. The outlet pipe 1 is connected to the sampling port of the gas detection device 7. The connection between the two is a conventional technique, and the specific structure will not be described in detail. The gas detection device 7 is a conventional device. Those skilled in the art can select the appropriate device according to the actual gas being detected, and the specific working principle will not be described in detail. In this embodiment, the outlet pipe 1 is a three-way pipe and is equipped with two sets of gas collection devices.
[0037] See Figures 1 to 3 The gas collection device includes a base 3, a gas collection shaft 2, a connecting piece 4, and several gas collection blocks 6 sleeved outside the gas collection shaft 2.
[0038] See Figure 9The base 3 is fixedly connected to the frame of the aerosol delivery device 8, and the gas collecting shaft 2 is vertically connected to the base 3;
[0039] See Figure 3 The gas collecting shaft 2 has an axial gas collecting groove 21 on the side facing the object to be measured; the gas collecting block 6 has a central hole adapted to the gas collecting shaft 2, and a gas collecting hole 61 is provided on one surface of the gas collecting block 6, which is connected to the central hole.
[0040] See 7 and Figure 8 The adapter 4 has an air passage that connects the air collection groove 21 of the air collection shaft 2 and the air outlet pipe 1.
[0041] See Figure 4 and Figure 5 Among the several gas collecting blocks 6 fitted on the gas collecting shaft 2, the gas collecting holes 61 of the gas collecting block 6 that are adapted to the object to be tested face inward (i.e., towards the object to be tested), while the remaining gas collecting blocks 6 are rotated 90-270° to disconnect from the gas collecting groove 21 on the gas collecting shaft 2. Those skilled in the art can also change the width of the gas collecting groove 21, and thus rotate it to other angles to control the opening and closing of the gas collecting holes 61.
[0042] It should be noted that those skilled in the art can also design the cross-section of the gas collecting shaft 2 to be irregular, and change the position of the gas collecting hole 21 by moving it up and down and re-fitting it. The gas collecting shaft 2 and the gas collecting block 6 are clearance-fitted. The gas collecting shaft 2 and the adapter are also clearance-fitted, ensuring no air leakage while allowing for adjustment of their relative positions.
[0043] join Figure 6 In this embodiment, the uppermost gas collecting block 6 is connected to the adapter 4, and the gas collecting shaft 2 on the lower side of the bottommost gas collecting block 6 is fitted with a nut 5 through a thread 22. The nut 5 is tightly attached to the bottommost gas collecting block 6 so as to fix the gas collecting blocks 6 together.
[0044] join Figure 8 In this embodiment, the upper part of the central hole is provided with a countersunk hole, and the lower part of the central hole is provided with a boss adapted to the countersunk hole. The lower part of the adapter is also provided with a boss adapted to the countersunk hole. This is used for positioning and installation between the air collecting blocks 6, and to ensure the airtightness between the air collecting blocks 6.
[0045] In this embodiment, the gas collecting shaft 2 is inserted into the adapter 4, and the two are fixed together by screws. A sealing ring is provided between the adapter 4 and the gas collecting shaft 2 to ensure airtightness.
[0046] Instructions for use: Based on the actual size of the aerosol being tested, rotate the gas collecting hole 61 on the gas collecting block 6 at the corresponding height (usually the position of the aerosol valve) to the gas collecting groove 21, and rotate the gas collecting holes 61 of the remaining gas collecting blocks 6 to the closed state. This can avoid collecting too much unnecessary sampling gas and improve the accuracy of leak detection.
[0047] Alternatively, based on the characteristic that leaks generally occur at specific locations such as the connection between the valve and the tank body, or at the bottom of the tank, the gas collection port 61 at that specific location can be rotated to the gas collection groove 21.
[0048] Example 2
[0049] See Figure 10 and Figure 11 The difference between this embodiment and Embodiment 1 is that the top surface of the gas collecting block 6 is provided with four positioning pin holes 62, and the bottom surface of the gas collecting block 6 is provided with matching positioning spring beads 63. The bottom surface of the adapter 4 is also provided with matching positioning spring beads 63. The positioning spring beads 63 are conventional components, consisting of a spring and a ball, and the specific installation method will not be described in detail.
[0050] This embodiment is provided with a positioning pin hole 62 and a positioning spring ball 63, which are embedded and cooperate to facilitate the adjustment of the rotation angle and axial alignment between the air collecting blocks 6.
[0051] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.
Claims
1. A micro-bleed on-line sampling device comprising an outlet pipe connected to a sampling port of a gas detection device, characterised in that, It also includes at least one gas collection device; The gas collection device includes a base, a gas collection shaft, a connecting component, and several gas collection blocks fitted outside the gas collection shaft. The base is fixedly connected to the frame, and the gas collecting shaft is vertically connected to the base; The gas collecting shaft has an axial gas collecting groove on the side facing the object to be measured; the gas collecting block has a central hole adapted to the gas collecting shaft, and a gas collecting hole is formed on one surface of the gas collecting block, the gas collecting hole communicating with the central hole; The adapter is provided with an air passage, which connects the air collection groove of the air collection shaft and the air outlet pipe.
2. The micro-leakage on-line sampling device of claim 1, wherein the sleeve Among the several gas collecting blocks on the gas collecting shaft, the gas collecting hole of the gas collecting block that is adapted to the object to be tested faces inward, and the remaining gas collecting blocks are rotated 90-270° to disconnect from the gas collecting groove on the gas collecting shaft.
3. The micro-bleed on-line sampling device of claim 1, wherein, The uppermost gas collecting block is connected to the adapter, and a nut is threaded onto the gas collecting shaft on the lower side of the bottommost gas collecting block. The nut is tightly fitted to the bottommost gas collecting block to fix the gas collecting blocks together.
4. The micro-bleed on-line sampling device of claim 1, wherein, The upper part of the central hole is provided with a countersunk hole, the lower part of the central hole is provided with a boss adapted to the countersunk hole, and the lower part of the adapter is provided with a boss adapted to the countersunk hole.
5. The micro-bleed on-line sampling device according to any one of claims 1 to 4, wherein, The top surface of the gas collecting block is provided with four positioning pin holes, the bottom surface of the gas collecting block is provided with two matching positioning spring beads, and the bottom surface of the adapter is also provided with two matching positioning spring beads.
6. The micro-bleed on-line sampling device of claim 1, wherein, A sealing ring is provided between the adapter and the gas collecting shaft.
7. The micro-bleed on-line sampling device of claim 1, wherein, It includes two sets of gas collection devices, and the gas outlet pipe is a three-way pipe.