Sample filtering device

Abstract

The utility model relates to the technical field of sample detection, and discloses a sample filtering device which comprises a supporting frame, an injector barrel, a needle type filter, a sample bottle and a semi-automatic positive pressure device, a first supporting plate is arranged at the top end of the supporting frame and used for supporting the injector barrel, and the lower end of the injector barrel is connected with the needle type filter. The lower end of the needle type filter directly faces a bottle opening of the sample bottle; the semi-automatic positive pressure device comprises a gas distribution plate, a gas path outlet is formed in the bottom face of the gas distribution plate, the supporting frame can move in the vertical direction, and when the supporting frame moves upwards to the highest position, the upper end of the injector barrel is in butt joint communication with the gas path outlet. According to the semi-automatic positive pressure device, the consistency of pressure applied to the interior of the syringe barrel can be easily controlled, so that the problem that the accuracy of a detection result is influenced due to the difference between filtered samples caused by a manual pressurization mode is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sample detection technical field, concretely relates to a sample filtering device. BACKGROUND

[0002] In the related art, it is necessary to filter the sample in advance when analyzing and detecting the sample. For example, when performing ultraviolet-visible spectrum analysis, the suspended particles that may exist in the sample will interfere with the propagation of light or cause light scattering, resulting in inaccurate absorbance measurement. When performing mass spectrum analysis, the solid particles existing in the sample may block the nozzle or ion source of the instrument, resulting in inaccurate analysis results or instrument failure. In liquid chromatography analysis, the sample needs to be separated in a liquid mobile phase. If the sample contains suspended matter, it will cause column blockage, increased baseline noise, or reduced separation efficiency. In gas chromatography analysis, the sample needs to be separated in a gas mobile phase. If the sample contains particulate matter, it will cause gas path system blockage or affect the performance of the detector. Ion chromatography is commonly used to analyze ions in water samples or other liquids. The presence of solid particles or suspended matter in the sample will affect the accuracy of the analysis and may cause column blockage. As can be seen, by filtering the sample to remove particulate impurities in the sample, not only can the instrument be protected, but also the accuracy and reliability of the sample detection can be improved.

[0003] In the prior art, the filtration of the sample to be analyzed is generally performed by a syringe cooperating with a needle filter. By manually pressing the pressing rod of the syringe, the sample to be filtered in the syringe barrel is pushed and passes through the needle filter to achieve the filtration of the sample to be analyzed. Since the force of manually pressing the pressing rod each time is different, there may be differences between the filtered samples, which affects the accuracy of the detection results. In addition, for a three-party detection agency that has a large number of samples to be detected, each sample needs to be finely filtered before detection, which is a difficult task. Because it not only consumes a lot of time and effort, but also seriously affects the efficiency of detection and analysis. SUMMARY

[0004] The utility model aims at solving at least one of the above technical problems in the prior art to some extent.

[0005] In order to achieve the above object, the utility model provides a kind of sample filtering device, including support frame, syringe barrel, needle filter, sample bottle and semi-automatic positive pressure device, the top of the support frame is provided with first support plate for supporting the syringe barrel, the lower end of the syringe barrel is connected with the needle filter, the lower end of the needle filter is opposite the bottle mouth of the sample bottle;The semi-automatic positive pressure device includes gas distribution plate, the bottom surface of the gas distribution plate is provided with gas path export, the support frame is arranged to be able to move along up and down direction, and when the support frame is moved to the highest position upwards, the upper end of the syringe barrel is connected with the gas path export and is communicated.

[0006] Preferably, the semi-automatic positive pressure device includes a lifting unit, the lifting unit includes two lifting handles and a driving mechanism, the driving mechanism is used to drive the two lifting handles to rise or fall synchronously in the up and down direction, and the two lifting handles are correspondingly arranged at the two ends of the support frame to support the support frame.

[0007] Preferably, the support frame includes two side plates arranged in parallel and spaced apart, the upper ends of the two side plates are respectively bent outward to form a lap joint portion extending in the horizontal direction, and the lap joint portion is used to abut on the lifting handle.

[0008] Preferably, the support frame and the first support plate are respectively provided with a positioning pin and a positioning groove in opposite positions, the positioning pin is used to be inserted into the positioning groove to position the first support plate to the upper side of the support frame.

[0009] Preferably, the support frame is provided with a second support plate, the second support plate is located below the first support plate, the second support plate is provided with a second through hole for the lower end of the needle filter to pass through and stop the body of the needle filter; The second support plate is arranged to be able to move along the up and down direction on the support frame, so as to adjust the position of the second through hole relative to the first support plate.

[0010] Preferably, the two ends of the second support plate are respectively provided with a connecting portion extending in the up and down direction, and the connecting portion is provided with a strip-shaped hole extending in the up and down direction for a bolt to pass through and be fixed to the side of the support frame.

[0011] Preferably, the support frame is provided with a third support plate for supporting the sample bottle.

[0012] Preferably, the third support plate is arranged to be able to move along the up and down direction on the support frame, so as to adjust the position of the sample bottle placed on the third support plate relative to the needle filter.

[0013] Preferably, the bottom of the support frame is provided with an open upward waste liquid collecting groove.

[0014] Preferably, the syringe barrels and the sample bottles are provided with a plurality of groups of one-to-one correspondence on the support frame, the bottom surface of the gas distribution plate is provided with a plurality of gas path outlets, and when the support frame is moved upward to the highest position, the plurality of gas path outlets are in one-to-one correspondence with the upper ends of the plurality of syringe barrels.

[0015] By the above technical scheme, the sample to be filtered is added into the syringe barrel, and then the support frame is moved upward, and when the support frame is moved upward to the highest position, the upper end of the syringe barrel is in butt joint communication with the gas path outlet; the semi-automatic positive pressure device is used to fill gas into the syringe barrel, and the pressure generated by the gas filled into the syringe barrel can make the sample to be filtered pass through the needle filter and drop into the sample bottle, so as to realize the sample filtering treatment.

[0016] Compared with the manual pressurization mode in the prior art, the scheme provided by the utility model can easily control the consistency of the pressure applied to the syringe barrel by the semi-automatic positive pressure device, so as to avoid the problem that the differences between the filtered samples caused by the manual pressurization mode affect the accuracy of the detection results; in addition, in the scheme provided by the utility model, the syringe barrel supported by the first support plate can be conveniently and efficiently in butt joint communication with the gas path outlet on the gas distribution plate, and in the specific operation, the support frame is first moved to the lower side of the gas distribution plate, and then the support frame is moved upward to make the upper end of the syringe barrel in butt joint communication with the gas path outlet, which is simple, convenient and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of a sample filtering device provided by the utility model;

[0018] Figure 2 is Figure 1 is an enlarged schematic view of position A in

[0019] Figure 3 is Figure 1 is an enlarged schematic view of position B in

[0020] BRIEF DESCRIPTION OF DRAWINGS

[0021] 10. Support frame; 101. Side plate; 1011. Overlapping portion; 1012. Locating pin; 11. First support plate; 111. Locating groove; 112. First through hole; 12. Second support plate; 121. Second through hole; 122. Connecting portion; 1221. Strip hole; 13. Third support plate; 14. Fourth support plate; 20. Syringe barrel; 30. Needle filter; 40. Sample bottle; 41. Positioning box; 50. Gas distribution plate; 51. Gas outlet; 60. Lifting armrest; 70. Waste liquid collection tank. DETAILED DESCRIPTION

[0022] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0023] like Figure 1 As shown, the utility model provides a sample filtering device, including a support frame 10, a syringe barrel 20, a needle filter 30, a sample bottle 40 and a semi-automatic positive pressure device, wherein the top of the support frame 10 is provided with a first support plate 11 for supporting the syringe barrel 20, the lower end of the syringe barrel 20 is connected to the needle filter 30, and the lower end of the needle filter 30 is opposite to the bottle mouth of the sample bottle 40; the semi-automatic positive pressure device includes an air distribution plate 50, and the bottom surface of the air distribution plate 50 is provided with an air path outlet 51, the support frame 10 is configured to be movable in the up and down directions, and when the support frame 10 moves upward to the highest position, the upper end of the syringe barrel 20 is connected to the air path outlet 51.

[0024] When the sample filtering device provided by the present invention is used, the syringe barrel 20 is first supported by the first support plate 11, and then the needle filter 30 is connected to the lower end of the syringe barrel 20, and the sample bottle 40 is arranged below the needle filter 30 so that the bottle mouth of the sample bottle 40 is opposite to the lower end of the needle filter 30; the sample to be filtered is added into the syringe barrel 20, and then the entire support frame 10 is moved upward. When the support frame 10 moves upward to the highest position, the upper end of the syringe barrel 20 is connected to the gas outlet 51; gas is filled into the syringe barrel 20 by a semi-automatic positive pressure device. The pressure generated by the gas filled into the syringe barrel 20 can make the sample to be filtered pass through the needle filter 30 and drip into the sample bottle 40, thereby realizing sample filtration processing.

[0025] Compared with the manual pressurization in the prior art, the scheme provided by the utility model can easily control the consistency of the pressure applied to the syringe barrel 20, thereby avoiding the problem that the differences between the filtered samples caused by the manual pressurization affect the accuracy of the detection results; in addition, in the scheme provided by the utility model, the syringe barrel 20 supported by the first support plate 11 can be conveniently and efficiently connected and communicated with the gas path outlet 51 on the gas distribution plate 50; in the specific operation, the support frame 10 is first moved to the position directly below the gas distribution plate 50, and then the support frame 10 is moved upward to make the upper end of the syringe barrel 20 connected and communicated with the gas path outlet 51, which is simple, convenient and efficient.

[0026] In the utility model, the needle filter 30 is commonly used in the field, for example, in the chromatographic analysis laboratory, the needle filter 30 can be 0.22 mu m nylon (organic) needle filter or 0.45 mu m polyether sulfone (water-based) needle filter.

[0027] According to the technical scheme provided by the utility model, the semi-automatic positive pressure device can adopt the semi-automatic positive pressure device in the existing solid phase extraction, which can conveniently realize the movement of the support frame 10 in the up-down direction and easily control the amount of gas filled into the syringe barrel 20 through the gas path outlet 51 of the gas distribution plate 50, thereby controlling the pressure applied to the sample to be filtered.

[0028] It can be understood that, in the scheme provided by the utility model, as a specific embodiment of the first support plate 11 supporting and fixing the syringe barrel 20, the first support plate 11 is provided with a first through hole 112 penetrating through the body, and the syringe barrel 20 is inserted into the first through hole 112 from top to bottom, and the ear part on the upper end of the syringe barrel 20 is stopped on the upper side of the first support plate 11, thereby realizing the support and fixation of the syringe barrel 20.

[0029] In the utility model, the support frame 10 can adopt any appropriate structure to realize the movement in the up-down direction, in some embodiments, the semi-automatic positive pressure device comprises a lifting unit, the lifting unit comprises two lifting handles 60 and a driving mechanism, the driving mechanism is used for driving the two lifting handles 60 to synchronously ascend or descend in the up-down direction, and the two lifting handles 60 are correspondingly arranged at the two ends of the support frame 10 to support the support frame 10.

[0030] In some embodiments, the support frame 10 comprises two side plates 101 arranged in parallel and spaced apart, and the upper ends of the two side plates 101 are respectively bent outward to form a lap portion 1011 extending horizontally, which is used to abut on the lifting handrails 60. Specifically, the length of the lifting handrails 60 is arranged to extend below the air distribution plate 50, facilitating the support frame 10 to be placed on the two lifting handrails 60 through the lap portions 1011 on both sides, and then pushed along the length direction of the lifting handrails 60 to the position below the air distribution plate 50, and then the two lifting handrails 60 are driven to rise synchronously by the driving mechanism, so as to drive the support frame 10 to move upward to the upper end of the syringe barrel 20 and the air path outlet 51 on the bottom surface of the air distribution plate 50.

[0031] In some embodiments, the support frame 10 and the first support plate 11 are respectively provided with a positionally opposite positioning pin 1012 and a positioning groove 111, and the positioning pin 1012 is used to be inserted into the positioning groove 111 to position the first support plate 11 on the upper side of the support frame 10.

[0032] It can be understood that the cooperation of the positioning pin 1012 and the positioning groove 111 can realize the rapid positioning of the first support plate 11 on the support frame 10 and ensure the consistency of the placement position of the first support plate 11 on the support frame 10. The present application does not specially limit the positions of the positioning pin 1012 and the positioning groove 111, as long as they are respectively arranged on the first support plate 11 and the support frame 10 to realize the rapid positioning of the first support plate 11 on the support frame 10 by their cooperation. For example, the positioning pin 1012 can be arranged on the first support plate 11, and the positioning groove 111 can be arranged on the support frame 10; or as shown in the drawings, the positioning groove 111 can be arranged on the first support plate 11, and the positioning pin 1012 can be arranged on the support frame 10. More specifically, the positioning pin 1012 is arranged on the upper side of the lap portion 1011. In actual operation, the first support plate 11 can be taken off from the support frame 10, facilitating the technician to place the syringe barrel 20 on the first support plate 11, and then place the first support plate 11 together with the syringe barrel 20 on the support frame 10. Figure 2

[0033] In some embodiments, in combination with the above-mentioned embodiments, the support frame 10 further comprises a second support plate 12 arranged on the upper side of the support frame 10 and used to support the syringe barrel 20. Figure 3 ​As shown, the support frame 10 is provided with a second support plate 12, which is located below the first support plate 11, and the second support plate 12 is provided with a second through hole 121 for the lower end of the needle filter 30 to pass through and stop the body of the needle filter 30; the second support plate 12 is arranged to be movable in the up-down direction on the support frame 10, so as to adjust the position of the second through hole 121 relative to the first support plate 11. By arranging the second support plate 12 and stopping the needle filter 30 by the second through hole 121 on the second support plate 12, the problem of the needle filter 30 falling off when the semi-automatic positive pressure device pressurizes the syringe barrel 20 is prevented.

[0034] In the utility model, the second support plate 12 can adopt any appropriate form to adjust the mounting position thereof on the support frame 10, and then adjust the position of the second through hole 121 thereof relative to the first support plate 11. In some embodiments, the two ends of the second support plate 12 are respectively provided with a connecting portion 122 extending in the up-down direction, and the connecting portion 122 is provided with a strip-shaped hole 1221 extending in the up-down direction for a bolt to pass through and be fixed to the side of the support frame 10.

[0035] In some embodiments, the support frame 10 is provided with a third support plate 13 for supporting the sample bottle 40. Further, in order to facilitate operation, the sample bottle 40 is first placed into the positioning box 41, and then the positioning box 41 is placed on the third support plate 13.

[0036] In some embodiments, the third support plate 13 is arranged to be movable in the up-down direction on the support frame 10, so as to adjust the position of the sample bottle 40 placed on the third support plate 13 relative to the needle filter 30. By the above arrangement, the position of the sample bottle 40 can be adjusted, so that the lower end of the needle filter 30 is inserted below the bottle mouth of the sample bottle 40, so as to ensure that all the samples filtered by the needle filter 30 are dropped into the sample bottle 40, and effectively prevent the problem of sample spilling; after the filtering process is completed, the position of the third support plate 13 in the up-down direction of the support frame 10 is adjusted, so that the lower end of the needle filter 30 is separated from the bottle mouth of the sample bottle 40, and the sample bottle 40 can be taken out.

[0037] It can be understood that the third support plate 13 can adopt the same structure as the second support plate 12 to adjust the position thereof, and the utility model does not make redundant description here.

[0038] In some embodiments, the bottom of the support frame 10 is provided with an open upward waste liquid collecting groove 70. By providing the waste liquid collecting groove 70, the waste liquid generated during the sample filtration process can be collected, and the problem of pollution caused by the waste liquid spilling is avoided. Further, in the embodiments of the present application, the bottom of the support frame 10 is provided with a fourth support plate 14 for supporting the waste liquid collecting groove 70.

[0039] In some embodiments of the present application, the syringe barrel 20 and the sample bottle 40 are provided in one-to-one correspondence on the support frame 10 in multiple groups, the bottom surface of the gas distribution plate 50 is provided with multiple gas path outlets 51, and when the support frame 10 is moved upward to the highest position, multiple gas path outlets 51 are in one-to-one correspondence with the upper ends of multiple syringe barrels 20.

[0040] In the technical scheme provided by the present application, by providing multiple groups of syringe barrels 20 and sample bottles 40, simultaneous filtration operation of multiple samples to be tested can be realized at one time, the efficiency of sample pretreatment is improved, and the pressure of multiple samples to be tested during filtration is ensured to be consistent, thereby reducing the errors between samples caused by manual operation in the existing pretreatment scheme. The sample filtration device provided by the present application is particularly suitable for the filtration treatment of samples to be tested in chromatographic analysis with large sample quantity and parallel test.

[0041] It can be understood that in the present application, the side edge of the first support plate 11 is further provided with multiple marks, the multiple marks are arranged at intervals along the length direction of the first support plate 11, and the multiple marks correspond one-to-one to the multiple syringe barrels 20 placed on a row of the first support plate 11. Through the above arrangement, the technical personnel can conveniently perform simple position identification on the syringe barrels 20, and prevent confusion during the process of adding samples to the syringe barrels 20. Exemplarily, the marks can be numbers or letters.

[0042] The preferred embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited thereto. Within the technical concept of the present application, various simple modifications can be made to the technical scheme of the present application. In order to avoid unnecessary repetition, the present application will not be described again for various possible combination modes. However, these simple modifications and combinations should also be regarded as the disclosed content of the present application, and all belong to the protection scope of the present application.

Claims

1. A sample filtration device, characterized by, The support frame (10) is provided with a first support plate (11) at the top end for supporting the syringe barrel (20), the lower end of the syringe barrel (20) is connected with the needle filter (30), and the lower end of the needle filter (30) is opposite to the bottle opening of the sample bottle (40); The semi-automatic positive pressure device comprises a gas distribution plate (50), the bottom surface of the gas distribution plate (50) is provided with a gas path outlet (51), the support frame (10) is arranged to be movable in the up-down direction, and when the support frame (10) is moved upward to the highest position, the upper end of the syringe barrel (20) is connected in communication with the gas path outlet (51).

2. The sample filtration device of claim 1, wherein, The semi-automatic positive pressure device comprises a lifting unit, the lifting unit comprises two lifting handles (60) and a driving mechanism, the driving mechanism is used for driving the two lifting handles (60) to synchronously ascend or descend in the up-down direction, and the two lifting handles (60) are correspondingly arranged at the two ends of the support frame (10) for supporting the support frame (10).

3. The sample filtration device of claim 2, wherein, The support frame (10) comprises two parallel and spaced apart side plates (101), the upper ends of the two side plates (101) are respectively outwardly bent to form a lap joint portion (1011) extending in the horizontal direction, and the lap joint portion (1011) is used for abutting against the lifting handle (60).

4. The sample filtration device of claim 1, wherein, The support frame (10) and the first support plate (11) are respectively provided with a positioning pin (1012) and a positioning groove (111) in opposite positions, the positioning pin (1012) is used for being inserted into the positioning groove (111) to position the first support plate (11) to the upper side of the support frame (10).

5. The sample filtration device of claim 1, wherein, The support frame (10) is provided with a second support plate (12), the second support plate (12) is located below the first support plate (11), the second support plate (12) is provided with a second through hole (121) for the lower end of the needle filter (30) to pass through and stop the body of the needle filter (30); the second support plate (12) is arranged to be movable in the up-down direction on the support frame (10), so as to adjust the position of the second through hole (121) relative to the first support plate (11).

6. The sample filtration device of claim 5, wherein, The two ends of the second support plate (12) are respectively provided with a connecting portion (122) extending in the up-down direction, and the connecting portion (122) is provided with a strip-shaped hole (1221) extending in the up-down direction for a bolt to pass through and be fixed to the side of the support frame (10).

7. The sample filtration device of claim 1, wherein, The support frame (10) is provided with a third support plate (13) for supporting the sample bottle (40).

8. The sample filtration device of claim 7, wherein, The third support plate (13) is arranged to be movable in the up-down direction on the support frame (10), so as to adjust the position of the sample bottle (40) placed on the third support plate (13) relative to the needle filter (30).

9. The sample filtration device of claim 1, wherein, The bottom of the support frame (10) is provided with an upwardly open waste liquid collecting groove (70).

10. The sample filtration device of any one of claims 1-9, wherein, The syringe barrels (20) and the sample bottles (40) are provided in one-to-one correspondence on the support frame (10) in multiple groups, and the bottom surface of the gas distribution plate (50) is provided with multiple gas path outlets (51); when the support frame (10) is moved upward to the highest position, multiple gas path outlets (51) are in one-to-one correspondence with the upper ends of multiple syringe barrels (20) and are in communication.

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