A double layer sampling membrane holder for large flow samplers

Abstract

The utility model discloses a double -deck sampling membrane bracket for large -flow sampler relates to environmental monitoring equipment technical field, including two hollowed out apron and two original stainless steel screen surface, and the opposite surface of two hollowed out apron is installed with two original stainless steel screen surface, and the opposite surface of each hollowed out apron and original stainless steel screen surface is placed with filter membrane, and two hollowed out aprons are fixed through screw subassembly. The utility model discloses a double -deck sampling membrane bracket for large -flow sampler specially aims at Tisch TE 6000 series etc. large -flow sampler carries out structural innovation, realizes the function of synchronous collection particulate matter and gas sample on a sampler, has good compatibility, the advantage such as low modification cost, structure stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring equipment technology, and in particular to a double-layer sampling membrane holder for a high-flow sampler. Background Technology

[0002] High-flow-rate particulate matter samplers are used in environmental monitoring to collect total suspended particulate matter (TSP) and PM2.5 in the air. 10 PM 2.5 The key equipment for sample collection has a standard sampling flow rate of up to 1.13 m³ / min and uses an 8-inch × 10-inch (203 mm × 254 mm) filter membrane. It can obtain sufficient sample volume to meet the needs of precise analysis of trace components and isotopes.

[0003] However, the original filter media holders of this type of sampler are usually single-layer structures, consisting of only a single layer of original stainless steel mesh and a single layer of perforated metal cover plate, secured with screws. Their function is limited; they can only hold one filter membrane at a time for collecting particulate matter and cannot simultaneously capture gaseous pollutants. Therefore, in applications requiring simultaneous analysis of gaseous pollutants (such as sulfur dioxide), this method is ineffective. HN In studies on the gas-particle conversion mechanism between particulate matter and other particles, existing structures are difficult to meet the requirements of simultaneous sampling and homologous comparison, which in particular limits the application of studies such as isotope fractionation tracing of gas-particle conversion pathways.

[0004] Although there are existing multi-layer filter membrane support solutions suitable for small and medium flow rate samplers, their structural strength and sealing performance are insufficient to withstand the high airflow impact under high flow rate (≥1.13 m³ / min) conditions, and therefore cannot be directly adopted for use.

[0005] The current alternative for simultaneous gas and particulate matter sampling is to use two independent samplers in parallel, one for particulate matter sampling and the other requiring a special device for gas sampling. This approach suffers from high equipment purchase and operating costs, high energy consumption, and difficulty in ensuring complete consistency in sampling time, gas source, and flow rate between the two devices, resulting in a lack of data homogeneity and severely impacting the accuracy of subsequent analysis.

[0006] Developing a double-layer sampling membrane holder for high-flow samplers that can directly replace original parts and work in conjunction with the original stainless steel mesh surface of the sampler has become a technical challenge that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] The purpose of this invention is to provide a double-layer sampling membrane holder for a high-flow sampler, thereby solving the problems listed in the background art.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This utility model discloses a double-layer sampling membrane holder for a high-flow sampler, comprising two perforated cover plates and two original stainless steel mesh panels, wherein the two original stainless steel mesh panels are installed between the opposite surfaces of the two perforated cover plates. Furthermore, a filter membrane is placed between the opposite surfaces of each of the aforementioned perforated cover plates and the original stainless steel mesh surface; The two perforated cover plates are fixed together by screws.

[0009] Preferably, the perforated cover plate includes a cover plate body, and the four corners of the cover plate body are provided with positioning notches; A hollowed-out through groove is provided in the middle of the cover plate body; The cover plate body has receiving grooves on both sides; A threaded through hole is provided at the center of the receiving groove.

[0010] Preferably, the positioning notch is designed to work in conjunction with the sampler host unit.

[0011] Compared with the prior art, the beneficial technical effects of this utility model are as follows: This utility model discloses a double-layer sampling membrane holder for a high-flow sampler. It is the first to apply a double-layer sampling structure to a high-flow sampler. Through specific structural reinforcement and interface compatibility design, it successfully solves the problems of stability and sealing of the double-layer structure under high flow rate, and realizes the simultaneous and co-source collection of particulate matter and gas samples on a single high-flow sampler. Excellent compatibility and economy: This utility model only requires the manufacture of two hollow cover plates and the original stainless steel mesh surface of the core support component. All the original parts of the Tisch TE-6000 series sampler are directly reused, resulting in extremely low modification costs. The overall structure is fully compatible with the original machine and can be directly replaced and installed, achieving zero-threshold upgrade. Stable and coordinated structure: The corner positioning and screw assembly locking scheme designed for high-flow conditions, together with the original stainless steel mesh, form a rigid whole, effectively resisting the impact of high-speed airflow and ensuring the stability of the sampling process and the accuracy of the data. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the assembly of a double-layer sampling membrane holder for a high-flow sampler according to the present invention; Figure 2 This is a front view schematic diagram of the hollow cover plate of this utility model; Figure 3 This is a side view (section view) of the hollow cover plate of this utility model. Figure 4This is a rear view schematic diagram of the hollow cover plate of this utility model.

[0014] Explanation of reference numerals in the attached drawings: 1. Hollowed-out cover plate; 101. Positioning notch; 102. Cover plate body; 103. Threaded through hole; 104. Receiving groove; 105. Hollowed-out through groove; 2. Original stainless steel mesh surface; 3. Screw assembly. Detailed Implementation

[0015] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0016] like Figure 1-4 As shown, a double-layer sampling membrane holder for a high-flow sampler includes two perforated cover plates 1 and two original stainless steel mesh panels 2, with the two original stainless steel mesh panels 2 installed between the opposite surfaces of the two perforated cover plates 1. Furthermore, a filter membrane is placed between the opposite surfaces of each of the hollow cover plates 1 and the original stainless steel mesh surface 2; The two perforated cover plates 1 are fixed by screw assembly 3; The dimensions of the perforated cover plate are matched with the original filter media support of the Tisch TE-6000 series high-flow sampler, so that it can be easily installed into the sampler. During sampling, the upper filter membrane is sandwiched between the upper perforated cover plate and the upper original stainless steel mesh, and the lower filter membrane is sandwiched between the lower perforated cover plate and the lower original stainless steel mesh. The upper perforated cover plate, the upper original stainless steel mesh, the lower perforated cover plate, and the lower original stainless steel mesh are fastened together by screw assemblies to form a whole.

[0017] Specifically, the hollow cover plate 1 includes a cover plate body 102, and the four corners of the cover plate body 102 are provided with positioning notches 101; A hollowed-out through groove 105 is provided in the middle of the cover plate body 102; The cover plate body 102 has receiving grooves 104 on both sides; The center of the receiving groove 104 is provided with a threaded through hole 103.

[0018] Specifically, the positioning notch 101 is used in conjunction with the sampler host.

[0019] Example 1

[0020] This embodiment takes the modification of the American Tisch TE-6000 series high-flow sampler as an example.

[0021] like Figure 1 As shown, the core of this utility model is two newly designed hollow cover plates. The upper and lower hollow cover plates are preferably made of stainless steel, and their specific dimensions are: length 295.3mm, width 228mm, and thickness 5mm. The four corners of the hollow cover plates are provided with positioning notches for cooperation with the positioning screws in the main unit. During assembly, the original stainless steel mesh panels 2 of the Tisch TE-6000 series sampler are stacked in sequence: lower original stainless steel mesh panel -> lower filter membrane -> lower perforated cover plate -> upper original stainless steel mesh panel -> upper filter membrane -> upper perforated cover plate. Then, two screw assemblies 3 with a length of 70mm and a diameter of 3mm are passed through the pre-drilled threaded through holes 103 with a diameter of 3.5mm in the middle of the left and right sides to tighten them. This assembly can directly replace the original single-layer bracket.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A double-layer sampling membrane holder for a high-flow-rate sampler, characterized in that: It includes two perforated cover plates (1) and two original stainless steel mesh panels (2), with the two original stainless steel mesh panels (2) installed between the opposite sides of the two perforated cover plates (1). Furthermore, a filter membrane is placed between the opposite surfaces of each of the hollow cover plates (1) and the original stainless steel mesh surface (2); The two perforated cover plates (1) are fixed by screw assembly (3).

2. The double-layer sampling membrane holder for a high-flow-rate sampler according to claim 1, characterized in that: The hollow cover plate (1) includes a cover plate body (102), and the four corners of the cover plate body (102) are provided with positioning notches (101). The cover plate body (102) has a hollow through groove (105) in the middle. The cover plate body (102) has receiving grooves (104) on both sides. The center of the receiving groove (104) is provided with a threaded through hole (103).

3. A double-layer sampling membrane holder for a high-flow-rate sampler according to claim 2, characterized in that: The positioning notch (101) works in conjunction with the sampler host.

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