A rapid enrichment device for stirred silicone rubber filaments
The silicone rubber filaments driven by an electric drill form a radial distribution, which solves the problems of low mass transfer efficiency and breakage in existing membrane enrichers during high-speed stirring, and achieves efficient organic matter enrichment and low residue detection effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-03
AI Technical Summary
Existing composite membrane enrichers are prone to folding or sticking to the wall during high-speed stirring, resulting in a decrease in local mass transfer efficiency. Furthermore, the membranes are highly rigid and prone to fatigue and breakage, leading to a high residual rate of organic matter during thermal desorption.
The silicone rubber filaments driven by an electric drill are arranged in a radial pattern. The fine-diameter silicone rubber filaments independently cut the water flow to form high-intensity turbulence, avoiding rigid breakage. During thermal desorption, they are suspended and dispersed to improve the uniformity of carrier gas contact.
It improves the enrichment efficiency of organic matter, reduces the residual rate of organic matter, avoids membrane clogging problems, and is lightweight and portable, making it suitable for complex water sample testing.
Smart Images
Figure CN224456347U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of environmental analysis and testing technology, and more specifically, to a rapid enrichment device for stirred silicone rubber filament bundles. Background Technology
[0002] Extracting and analyzing organic matter from water samples is a key step in water quality monitoring and pollution control, and an important technical means to achieve sustainable use of water resources.
[0003] In the field of organic matter detection in aquatic environments, efficient extraction technology is a core prerequisite for accurate analysis. Currently, mainstream extraction technologies include liquid-liquid extraction, solid-phase extraction, solid-phase microextraction, and membrane enrichment extraction. Among them, membrane enrichment extraction technology, with its unique separation mechanism, shows significant advantages in the extraction of volatile and semi-volatile organic compounds.
[0004] Specifically, static membrane extraction technology achieves mass transfer by keeping the water sample and the extract phase in static contact on both sides of the membrane. It is simple to operate and has few interfering factors, making it particularly suitable for the extraction of volatile organic compounds. Dynamic membrane extraction technology, on the other hand, significantly improves the mass transfer efficiency of organic matter on both sides of the membrane by integrating dynamic enhancement methods such as peristaltic pump circulation and stirring. Therefore, it is more suitable for processing water samples with complex composition and strong matrix interference.
[0005] While existing composite membrane enrichers have a larger specific surface area than single-tube enrichers, the membranes are prone to folding or adhering to the walls during high-speed stirring, leading to a decrease in local mass transfer efficiency. Furthermore, the membranes are highly rigid and susceptible to fatigue fracture after prolonged use. During thermal desorption, the membranes tend to agglomerate, resulting in insufficient contact with the carrier gas and a high residual organic matter rate. Utility Model Content
[0006] In response to the aforementioned technical problems, a rapid enrichment device for stirred silicone rubber filaments is provided. The silicone rubber filaments are rotated by an electric drill, which can rapidly enrich and extract organic matter from water samples.
[0007] The technical means adopted in this utility model are as follows:
[0008] A rapid enrichment device for stirring silicone rubber filament bundles includes a connecting rod, a fixing head, and silicone rubber filament bundles. The silicone rubber filament bundles consist of 2 to 300 silicone rubber filaments. The fixing head binds and fixes one end of the silicone rubber filament bundle. The fixing head is connected to the connecting rod by a snap-fit. In the first working state, the connecting rod can be connected to the output end of an electric drill.
[0009] Furthermore, in the second working state, the enrichment device for enriching organic matter is placed in a thermal desorption container for testing. The inner side of the upper cover of the thermal desorption container is provided with a protruding structure, and the fixing head cooperates with the protruding structure to achieve an inverted installation.
[0010] Furthermore, the spacing between the silicone rubber filaments is 0.5~2mm, and they are evenly distributed radially.
[0011] Furthermore, the snap-fit connection includes a T-shaped protrusion on the fixing head and a T-shaped groove on the connecting rod, with the mating gap between the protrusion and the groove ≤0.1mm.
[0012] Furthermore, the silicone rubber filament has an outer diameter of 0.1~3mm and a length of 2~50cm.
[0013] Furthermore, the silicone rubber filament is made of methyl vinyl silicone rubber.
[0014] Compared with the prior art, the present invention has the following advantages:
[0015] 1. The radial bundle of 2 to 300 fine-diameter silicone rubber filaments of this invention has a specific surface area at least 3 times that of a membrane of the same volume. The silicone rubber filaments are driven to rotate by an electric drill. During stirring, each filament independently cuts the water flow, forming high-intensity turbulence, which effectively increases the diffusion rate of organic matter to the membrane and improves enrichment efficiency.
[0016] 2. The elastic modulus of silicone rubber filaments is much lower than that of diaphragms, allowing them to flexibly bend with the water flow during high-speed stirring, avoiding rigid breakage. During thermal decomposition, the filament bundles hang in the center of the container, naturally spreading out, and the carrier gas enters from the bottom and evenly washes the surface of each filament, resulting in a low organic residue rate.
[0017] 3. The device is lightweight and compact, making it easy to carry to the field. Furthermore, the radial structure of the filaments allows it to penetrate suspended solids in the water sample, avoiding the surface clogging problems common with membrane-type devices. The number of filaments can also be flexibly adjusted according to the sample concentration. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of a rapid enrichment device for stirred silicone rubber filament bundles.
[0020] Figure 2 This is a schematic diagram of a rapid enrichment device using a stirred silicone rubber filament bundle for the enrichment and extraction of water samples.
[0021] Figure 3 This is a schematic diagram of the present invention placed in a thermal desorption heating container.
[0022] In the diagram: 1. Silicone rubber filament; 2. Fixing head; 3. Connecting rod; 4. Water sample. Detailed Implementation
[0023] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. 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.
[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.
[0027] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0028] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0029] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0030] like Figure 1 , Figure 2 As shown in the figure, this utility model embodiment discloses a rapid enrichment device for stirring silicone rubber filament bundles, including a connecting rod 3, a fixing head 2, and a silicone rubber filament bundle 1. The silicone rubber filament bundle is composed of 2 to 300 silicone rubber filaments. The fixing head binds and fixes one end of the silicone rubber filament bundle. The fixing head is connected to the connecting rod by a snap-fit. The connecting rod can be connected to the output end of an electric drill in the first working state.
[0031] As an optional implementation, each silicone rubber filament is installed at the bottom of the fixing head by adhesive bonding.
[0032] Furthermore, such as Figure 3As shown, in the second working state, the enricher for enriching organic matter is placed in a thermal desorption container for testing. The inner side of the upper cover of the thermal desorption container is provided with a protruding structure, and the fixing head cooperates with the protruding structure to achieve inverted installation.
[0033] In other alternative implementations, depending on the specifications of the thermal desorption container, a structure that mates with the connecting rod can be directly provided on the inner side of the top cover of the thermal desorption container, so that the top cover of the thermal desorption container is directly connected to the connecting rod.
[0034] Furthermore, the spacing between the silicone rubber filaments is 0.5~2mm, and they are evenly distributed radially.
[0035] Furthermore, the snap-fit connection includes a T-shaped protrusion on the fixing head and a T-shaped groove on the connecting rod, with a fitting gap between the protrusion and the groove ≤0.1mm. The other end of the connecting rod is adapted to an electric drill.
[0036] Furthermore, the silicone rubber filament has an outer diameter of 0.1~3mm and a length of 2~50cm.
[0037] Furthermore, the silicone rubber filament is made of methyl vinyl silicone rubber.
[0038] The thermal desorption container includes an open cavity, a top cover, a heating element, an inlet pipe, and an outlet pipe. The cavity and the top cover are connected by threads. The inlet pipe and the outlet pipe are used to connect the carrier gas circuit of the ion migration tube in series. The heating element is used to heat and volatilize the organic matter enriched in the silicone rubber filament in the first working state.
[0039] During the enrichment stage, the filament bundle is pretreated at 100°C for 1 hour and then immersed in a water sample. An electric drill drives the filament bundle to rotate at 1000~3000 rpm (or it is left to stand). Organic matter is enriched on the surface of the filament and in the grooves through adsorption.
[0040] At this point, the organic matter is adsorbed by the silicone rubber.
[0041] Remove the silicone rubber composite membrane enrichment device, loosen the connecting rod, suspend the filament bundle in the thermal desorption container, heat it to 100~200℃, and the desorbed organic matter enters the detection equipment with the carrier gas to complete the qualitative and quantitative analysis.
[0042] Specifically, the inlet pipe is connected to the carrier gas source, and the outlet pipe is connected to the ion mobility spectrometer; the heating temperature is set, the temperature control sensor maintains the temperature stability, and the desorbed organic matter enters the detection equipment for analysis along with the carrier gas.
[0043] This invention can enrich and extract organic samples from water samples, as well as from air or mixed gases.
[0044] Prepare 250 ml of a 1 ppm tetrachloroethylene solution using purified water as the test sample;
[0045] Method for enriching and extracting organic matter from water samples: A rapid enrichment device for stirred silicone rubber filaments was pretreated in an oven at 100°C for 1 hour, then immersed in 250 ml of 1 ppm tetrachloroethylene aqueous solution and left at room temperature for 30 minutes. The rapid enrichment device for silicone rubber filaments was then removed and placed in a thermal desorption heating container to start heating and maintain at 100±20°C. At the same time, it was connected to the carrier gas of ion mobility spectrometry for analysis, and the corresponding analytical spectra and results were obtained.
[0046] The analytical conditions for ion mobility spectrometry (IMS) were as follows: positive ion mode was used during IMS operation; the ion migration tube temperature was 150℃; the inner diameter of the migration zone of the ion migration tube was 20 mm and the length was 7 cm; the inter-ring voltage was 330 V; the TP-type ion gate voltage was 340 V; the gate opening time was 50 μs; the duration of each analytical cycle was 10 ms; the average number of spectra was 10; the drift gas flow rate was 0.5 L / min; and the carrier gas flow rate was 0.2 L / min. The drift gas entered from the Faraday disk end of the migration tube, and the carrier gas entered from the reaction zone. In the reaction zone, the drift gas and the carrier gas flowed in the same direction. The outlet was located in the reaction zone near the radio frequency lamp.
[0047] Example 1
[0048] In this embodiment, there are two silicone rubber filaments, each with an outer diameter of 3mm and a length of 2cm.
[0049] According to the method of enriching and extracting organic matter from water samples, the silicone rubber filament bundle was rotated and stirred in the water sample at a speed of 100 rpm for 1 minute in a clockwise direction.
[0050] Then, the silicone rubber filament bundles were left to stand in the water sample to enrich organic matter for 0.1 hours;
[0051] Repeat the above steps of rotary stirring and static enrichment 10 times;
[0052] The silicone rubber filaments were removed and subjected to thermal desorption and ion mobility spectrometry analysis. The results showed that the characteristic peak mobility constant of tetrachloroethylene was 1.83±0.03 and the maximum peak height was 0.5V.
[0053] Example 2
[0054] In this embodiment, the number of silicone rubber filaments is 300, with an outer diameter of 0.1 mm and a length of 50 cm;
[0055] Following the method for enriching and extracting organic matter from water samples, the silicone rubber filament bundle was rotated and stirred in the water sample at a speed of 3000 rpm for 10 minutes in a clockwise direction.
[0056] The silicone rubber filaments were removed and subjected to thermal desorption and ion mobility spectrometry analysis. The results showed that the characteristic peak mobility constant of tetrachloroethylene was 1.83±0.03 and the maximum peak height was 3.7V.
[0057] Example 3
[0058] In this embodiment, the number of silicone rubber filaments is 50, with an outer diameter of 0.1 mm and a length of 20 cm;
[0059] Following the method of enriching and extracting organic matter from air, the above-mentioned silicone rubber filaments were placed in air containing 1 ppm tetrachloroethylene and allowed to stand for 48 hours to enrich the organic matter at an air humidity of 20% RH. After heating and thermal desorption and ion mobility spectrometry analysis, the migration constant of the characteristic peak of tetrachloroethylene was found to be 1.83 ± 0.03, and the maximum peak height was 3.3 V.
[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A rapid concentrator for agitated silica rubber strands, characterized by, It includes a connecting rod, a fixing head, and a silicone rubber filament bundle, wherein the silicone rubber filament bundle consists of 2 to 300 silicone rubber filaments, and the fixing head binds and fixes one end of the silicone rubber filament bundle; the fixing head and the connecting rod are connected by a snap-fit, and the connecting rod can be connected to the output end of an electric drill in the first working state.
2. The rapid concentrator of stirred silicone rubber strands according to claim 1, characterized in that, In the second working state, the enrichment device for enriching organic matter is placed in the thermal desorption container for testing. The inner side of the upper cover of the thermal desorption container is provided with a protruding structure, and the fixing head cooperates with the protruding structure to achieve inverted installation.
3. The rapid concentrator of stirred silicone rubber strands according to claim 1, characterized in that, The spacing between the silicone rubber filaments is 0.5~2mm, and they are evenly distributed radially.
4. The rapid concentrator of stirred silicone rubber strands according to claim 1, characterized in that, The snap-fit connection includes a T-shaped protrusion on the fixing head and a T-shaped groove on the connecting rod, with a fitting gap between the protrusion and the groove ≤0.1mm.
5. The rapid concentrator of stirred silicone rubber strands according to claim 1, characterized in that, The silicone rubber filament has an outer diameter of 0.1~3mm and a length of 2~50cm.
6. The rapid concentrator of stirred silicone rubber strands according to claim 1, characterized in that, The silicone rubber filament is made of methyl vinyl silicone rubber.