Extraction film fixing device
By designing the structure of the container and fixing components, the problems of unstable film fixation and non-adjustable position were solved, achieving stable fixation and precise position control of the extraction film, improving the accuracy and repeatability of experimental results, and making it suitable for sample bottles of various sizes.
Patent Information
- Application Number
- CN202520289931.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-02-24
AI Technical Summary
Existing membrane fixation devices cannot stably fix the extraction membrane, their position is not adjustable, and they are easily damaged, resulting in poor repeatability and accuracy of experimental results. In particular, they cannot effectively concentrate trace pollutants when analyzing large-volume water samples.
An extraction film fixing device was designed, comprising a container, a container stopper, and a fixing component. Through the combination of a rod, a mounting base, and an elastic rubber ring, the extraction film is stably fixed and its position is precisely controlled. The use of a graduated rod ensures accurate depth and avoids damage. It is suitable for sample bottles of various sizes.
This method achieves stable fixation and precise position control of the extraction membrane, reduces experimental errors, improves the repeatability and accuracy of experimental results, is applicable to sample bottles of different volumes, and reduces the cost of the device.
Smart Images
Figure CN223800109U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to chemical analysis instrument technical field, more specifically, the utility model relates to a kind of extraction film fixing device. BACKGROUND
[0002] Thin film solid phase microextraction (TF-SPME) is a new type of solid phase microextraction technology based on traditional extraction fiber as prototype, which coats the adsorption phase on the carbon mesh to form. Because of the larger surface area of the extraction phase, TF-SPME can achieve higher sensitivity and recovery than conventional SPME, and can complete the extraction and analysis process of the target in a shorter time. It is currently popular in the field of environmental pollutant analysis.
[0003] When TF-SPME technology is used for liquid sample analysis, the extraction film generally needs to be immersed to a certain liquid depth and fixed, and then the entire sample system is placed on a magnetic stirrer under certain temperature and speed conditions for extraction and concentration. The existing film fixing device is mainly suitable for the analysis of small volume samples (commonly 20 mL), which is generally composed of a circular metal sheet and a metal clamp welded together, and is installed inside the bottle cap and fixed by clamping the bottle opening. This fixing device is only suitable for use with specific small-sized sample bottles, and the position of the extraction film in the sample bottle cannot be adjusted, so the use scenario is limited. Especially when used for trace pollutant analysis in water environment, due to the low concentration of pollutants, it is necessary to increase the volume of water body (such as 1 L, 4 L and larger volume of water sample) to achieve high concentration enrichment of the target. At this time, due to the large opening or high bottle body of the sample bottle used, the existing film fixing device cannot be fixed on the bottle opening and immerse the film in the sample, so the extraction and concentration of the sample cannot be carried out. After trying, if the film is fixed and weighted by punching holes on the film with iron wire or string and adding sinkers to extend the distance between the film and the bottle opening, although the film can be immersed in the water body, there are the following shortcomings: first, the extraction film is damaged; second, when the speed of the magnetic stirrer is high, the film will float or curl in the water with the iron wire or string due to the vortex effect of the water body, and even stick to the bottle wall; third, the depth and position of the film immersed in the water body cannot be fixed, causing experimental deviation between different samples or operators. The above may affect the experimental results, which is not conducive to the repetition and reproducibility of the analysis results in the laboratory and between laboratories, and the accuracy of the results. SUMMARY
[0004] The utility model provides a kind of extraction film fixing device, which can solve the problems of unstable fixation, inconvenient operation, inaccurate position control and easy damage to the extraction film, and has a simple structure and low price. It is suitable for various specifications of sample bottles and is not limited by the volume of experimental samples. It can effectively control the height of the film in the bottle and reduce experimental errors.
[0005] In order to achieve these objects and other advantages of the present application, a kind of extraction film fixing device is provided, comprising:
[0006] Container (1), which is filled with water sample inside;
[0007] Container plug (2), which is covered in the container mouth, the middle part of the container plug (2) is provided with lower through hole;
[0008] Fixed component, it includes stem (3), mounting seat (4), the mounting seat (4) is installed above the container plug (2), the middle part of the mounting seat (4) is provided with upper through hole, the lower through hole is oppositely arranged with the upper through hole, the upper through hole is installed elastic rubber ring (5), the inner diameter of the elastic rubber ring (5) is less than the outer diameter of the stem (3), the stem (3) is extruded to pass through the elastic rubber ring (5) and via the lower through hole and is inserted into the container (1) inside, the bottom of the stem (3) is provided with extraction film clamp (6), the stem (3) is also provided with scale.
[0009] Preferably, the mounting seat (4) is installed on the container plug (2) by jacking bolt (8), the mounting seat (4) has downwardly extending seat plate, at least a pair of perforation is provided on the seat plate, the jacking bolt (8) passes through the perforation until the end of the jacking bolt (8) is resisted by the container plug (2) and is screwed with jacking nut (9).
[0010] Preferably, the top of the container plug (2) has guide slot, and the bottom of the mounting seat (4) is provided with matched guide protrusion.
[0011] Preferably, the top of the mounting seat (4) is provided with at least a pair of L-shaped push rod, and the vertical part is attached to the outer periphery of the stem (3).
[0012] Preferably, one side of the push rod is arc surface matched with the stem (3), and the arc surface extends along the radial direction to form an ear, and the ears of a pair of push rods are connected by fastening bolt.
[0013] Preferably, the contact surface of the extraction film clamp (6) and the extraction film (7) does not have teeth.
[0014] The present application at least includes the following beneficial effects:
[0015] The utility model discloses can solve the problem of unstable fixing, inconvenient operation, inaccuracy position control and easily damaged extraction film (7) etc., realize the stable fixing and accurate position control of extraction film (7) through the structural design of container (1), container plug (2) and fixed assembly, the stability of mounting seat (4) is enhanced through jacking bolt (8), the installation positioning of mounting seat (4) and container plug (2) is facilitated through the guiding structure, the stability and sealing property of the connection of stem body (3) and mounting seat (4) are improved through extruding part, prevent stem body (3) horizontal swing through L type push rod, realize perpendicular insertion, avoid the damage of extraction film clamp (6) to extraction film (7) through not setting tooth, simple structure, low in price, applicable to various specifications sample bottle, not limited by experimental sample volume, can effectively control the film height in bottle, and reduce experimental error.
[0016] The other advantages, objects and features of the utility model will be embodied partly through the following description, and the skilled in the art will also understand them partly through the research and practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0017] Fig. 1 It is the structure schematic diagram of one technical scheme of the utility model;
[0018] Fig. 2 It is the structure schematic diagram of the mounting seat of one technical scheme of the utility model. DETAILED DESCRIPTION
[0019] The utility model will be further explained in detail in connection with the drawings, so that the skilled in the art can implement according to the description text.
[0020] It should be understood that the terms such as "have", "contain" and "include" used in this paper do not exclude the presence or addition of one or more other elements or their combinations.
[0021] It should be noted that the experimental methods described in the following embodiments are conventional methods, and the reagents and materials are commercially available unless otherwise specified. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "providing" should be understood in a broad sense, for example, they can be fixedly connected, provided, or detachably connected, provided, or integrally connected, provided. For ordinary skilled persons in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. The orientations or positional relationships indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only intended to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0022] As shown in Figs. 1-2 The present application provides an extraction film fixing device, comprising:
[0023] A container (1) containing water samples inside, which can be made of glass or other transparent and chemically stable materials such as plastic, so as to observe the water sample;
[0024] A container plug (2) is provided on the container port, which is made of suitable materials such as rubber or plastic, and its shape and size should match the container port to ensure that it can be tightly covered on the container port. The middle part of the container plug (2) is provided with a through hole, which provides a channel for the installation of subsequent components;
[0025] The fixing assembly comprises a rod body (3) and a mounting base (4) installed above the container plug (2) and made of metal or high-strength plastic to ensure the strength and stability, the mounting base (4) is installed above the container plug (2) in a fixed or detachable manner, the middle part of the mounting base (4) is provided with an upper through hole, a lower through hole is oppositely arranged with the upper through hole, an elastic rubber ring (5) is installed at the upper through hole, the elastic rubber ring (5) has certain elasticity and sealing performance, the inner diameter of the elastic rubber ring (5) is smaller than the outer diameter of the rod body (3), the rod body (3) is extruded to pass through the elastic rubber ring (5) and extend into the container (1) through the lower through hole, the elastic rubber ring (5) is slightly deformed under extrusion, the elastic force makes the elastic rubber ring (5) extrude the rod body (3), the rod body (3) can be tightly matched with the elastic rubber ring (5), the bottom of the rod body (3) is provided with an extraction film clamp (6), a flat-mouthed alligator clamp can be used to firmly fix the extraction film (7) to prevent the film clamp from being damaged by the sawtooth, and the extraction film clamp (6) can be suitable for various types of films, and a scale is further arranged on the rod body (3) to accurately control the depth of the extraction film (7) in the water sample, an iron rod with a length of 20 cm can be used, and a small dot is laser-engraved on the iron rod as a scale every 1 cm.
[0026] In the above technical solution, when in use, the water sample is injected into the container (1), the extraction film (7) is installed on the extraction film clamp (6), the extraction film (7) is placed to the required depth of the water sample by the rod body (3) passing through the mounting base (4) and the container plug (2), and the device is placed in a water bath heating environment for extraction operation. Through the reasonable structure design of the container (1), the container plug (2) and the fixing assembly, the extraction film (7) can be stably supported and fixed, the position of the extraction film (7) in the water sample is ensured to be accurate, the accuracy and reliability of the extraction experiment are improved, the scale on the rod body (3) is convenient for accurately controlling the position of the extraction film (7) in the water sample, different depth water samples are convenient for analysis, the problems of unstable fixation, inconvenient operation, inaccurate position control and easy damage of the extraction film (7) can be solved, the structure is simple, the price is low, the device is suitable for various specifications of sample bottles and is not limited by the volume of the experimental sample, the height of the film in the bottle can be effectively controlled, and the experimental error is reduced.
[0027] In another technical solution, the mounting seat (4) is mounted on the container plug (2) by means of a jacking bolt (8), which can be made of stainless steel, and the appropriate size is selected according to the thickness of the seat plate and the required fastening force. The mounting seat (4) has a downwardly extending seat plate, which can be an annular seat plate or a plurality of independent panels. At least one pair of through holes are provided on the seat plate. Specifically, when the seat plate is an annular seat plate, at least one pair of through holes are provided on the seat plate. When the seat plate is a plurality of independent panels, one through hole is provided on each panel. The jacking bolt (8) passes through the through hole until the end of the jacking bolt (8) abuts against the container plug (2) and is tightened with a jacking nut (9). During the installation of the mounting seat (4) on the container plug (2), the jacking bolt (8) is passed through the through hole, and the end thereof gradually abuts against the container plug (2). By rotating the jacking nut (9) to adjust the tightening degree, the fastening force between the mounting seat (4) and the container plug (2) can be adjusted, ensuring that the mounting seat (4) is firmly and stably installed on the container plug (2), preventing the movement of the mounting seat (4) due to vibration or other external forces during use, avoiding the relative displacement of the mounting seat (4), ensuring the stability of the entire device during use, and improving the reliability and durability of the device.
[0028] In another technical solution, the top of the container plug (2) has a guide groove. The guide groove can be a dovetail groove or a T-shaped groove, and its depth and width are designed according to actual needs to ensure a certain precision. The bottom of the mounting seat (4) is provided with a matching guide protrusion. The shape and size of the guide protrusion on the bottom of the mounting seat (4) match the guide groove. When the mounting seat (4) and the container plug (2) are assembled, the guide protrusion is aligned with the guide groove, and the mounting seat (4) is gently pressed down so that the guide protrusion slides into the guide groove. Through this cooperation, accurate positioning and installation can be achieved, further ensuring that the rod body (3) is vertically arranged.
[0029] In another technical solution, the top of the mounting seat (4) is provided with at least one pair of L-shaped push rods, and the vertical part of the L-shaped push rod is attached to the outer periphery of the rod body (3). The L-shaped push rod can be made of metal, and the vertical part thereof is tightly attached to the outer periphery of the rod body (3). When the rod body (3) has a horizontal shaking tendency due to external forces, the vertical part of the L-shaped push rod will generate a reaction force on the rod body (3), preventing the horizontal displacement of the rod body (3) and ensuring that the rod body (3) always maintains a vertical state, thereby ensuring the stability of the extraction membrane (7) in the water sample and improving the accuracy of the experimental results.
[0030] In another technical solution, one side of the push rod is matched with the arc surface of the rod body (3), the arc surface extends along the radial direction to form an ear, and the ears of the pair of push rods are connected through fastening bolts.
[0031] In another technical solution, the contact surface of the extraction film clamp (6) and the extraction film (7) is not provided with teeth. The extraction film clamp (6) adopts a smooth plane as the contact surface of the extraction film (7), avoids the use of the toothed structure, the extraction film (7) will not be damaged due to the toothed structure of the contact surface, the integrity of the extraction film (7) can be ensured, the service life of the extraction film (7) is prolonged, and the experimental cost is reduced.
[0032] The number of devices and the processing scale described herein are used to simplify the description of the present application. The application, modification and change of the present application are obvious to those skilled in the art.
[0033] Although the embodiments of the present application have been disclosed as above, it is not limited to the application and the embodiments listed in the specification, and can be fully applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, therefore the present application is not limited to specific details and the figures shown and described herein.
Claims
1. An extraction membrane holder characterized by, The utility model relates to a container for water sample, which comprises: a container (1) for containing water sample; a container plug (2) covering the mouth of the container, the middle part of the container plug (2) being provided with a lower through hole; a fixing assembly comprising a rod (3) and a mounting base (4), the mounting base (4) being installed above the container plug (2), the middle part of the mounting base (4) being provided with an upper through hole, the lower through hole and the upper through hole being oppositely arranged, an elastic rubber ring (5) being installed at the upper through hole, the inner diameter of the elastic rubber ring (5) being smaller than the outer diameter of the rod (3), the rod (3) being extruded to pass through the elastic rubber ring (5) and extend into the container (1) through the lower through hole, the bottom of the rod (3) being provided with an extraction film clamp (6), and the rod (3) being further provided with a scale.
2. The extraction membrane holder of claim 1, wherein, The mounting base (4) is installed on the container plug (2) by means of a jacking bolt (8), the mounting base (4) being provided with a downwardly extending base plate, at least one pair of through holes being arranged on the base plate, the jacking bolt (8) passing through the through holes until the end of the jacking bolt (8) abuts against the container plug (2) and is screwed with a jacking nut (9).
3. The extraction membrane fixture of claim 1 or 2, wherein, The top of the container plug (2) is provided with a guide groove, and the bottom of the mounting base (4) is provided with a matching guide protrusion.
4. The extraction membrane holder of claim 1, wherein, The top of the mounting base (4) is provided with at least one pair of L-shaped push rods, the vertical parts of the push rods being attached to the outer periphery of the rod (3).
5. The extraction membrane holder of claim 4, wherein the extraction membrane holder is configured to be placed in a holder of a device for performing an extraction procedure. One side of the push rod is matched with the arc surface of the rod (3), the arc surface extending along the radial direction to form an ear part, and the ear parts of a pair of push rods are connected by a fastening bolt.
6. The extraction membrane holder of claim 1, wherein, The contact surface of the extraction film clamp (6) and the extraction film (7) is not provided with teeth.