Ion chromatography sample pretreatment pressurizing injector for environment detection

Abstract

The utility model relates to the field of ion chromatography sample pretreatment, in particular to an ion chromatography sample pretreatment pressure injector for environmental detection, which comprises an injector shell, and a buffer component is mounted on the surface of the injector shell. The filter tube, the threaded head, the sealing ring, the circular filter screen and the supporting ring are matched, so that the filter tube has the advantage of filtering impurities in a sample solution, the circular filter screen is placed on the supporting ring, then the sealing ring is placed on the circular filter screen, the filter tube is in contact with the threaded head, and the filter tube is rotated to be connected with the threaded head; the filter tube is fixed below the injector shell, so that impurities in a sample solution can be filtered when the sample solution is sucked, and the accuracy of ion chromatographic analysis is ensured; and through cooperation of a cylindrical pressing rod, a supporting shell, a supporting plate, a connecting plate, a buffer spring and a circular plate, the advantage that the downward-pressing injection speed can be reduced is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of ion chromatography sample pretreatment, in particular to a pressurized syringe for ion chromatography sample pretreatment in environmental detection. Background Technique

[0002] Ion chromatography is a commonly used analytical technique that can simultaneously determine multiple coexisting anions or cations. Before ion chromatography analysis, sample pretreatment is a crucial step because it directly affects the accuracy and reliability of the analysis. When pretreating ion chromatography samples, a pressurized syringe is required.

[0003] Through research and analysis, it is found that although the existing pressurized syringes can inject samples, to a certain extent, they still have the following disadvantages.

[0004] For example, when in use, impurities remain in the injected sample solution, and it does not have the function of filtering impurities. Therefore, during ion chromatography analysis, the impurities will affect the accuracy of the analysis and reduce the accuracy of the data after ion chromatography analysis. Moreover, when injecting, the phenomenon of too fast downward pressure is likely to occur, and it does not have the function of slowing down the downward injection speed. Therefore, it is easy to generate bubbles and affect the effect of subsequent ion chromatography analysis. To solve the above technical problems, we have designed a pressurized syringe for ion chromatography sample pretreatment in environmental detection. Content of the Utility Model

[0005] The purpose of the utility model is to provide a pressurized syringe for ion chromatography sample pretreatment in environmental detection, which has the advantages of being able to filter impurities in the sample solution and being able to slow down the downward injection speed, and solves the problems of not being able to filter impurities in the sample solution and not being able to slow down the downward injection speed.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: A pressurized syringe for ion chromatography sample pretreatment in environmental detection, including a syringe housing, a buffer assembly is installed on the surface of the syringe housing, the buffer assembly includes a support plate, the right side of the support plate is welded to the left side of the syringe housing, the top of the support plate is connected to a support shell by bolts, a buffer spring is welded to the bottom of the inner cavity of the support shell, a filter assembly is installed at the bottom of the syringe housing, the filter assembly includes a threaded head, the top of the threaded head is welded to the bottom of the syringe housing, a filter tube is threadedly sleeved on the surface of the threaded head, and a support ring is welded to the bottom of the inner cavity of the filter tube.

[0007] Preferably, a cylindrical pressure rod penetrates through the top of the support shell, a circular plate is welded to the bottom end of the cylindrical pressure rod, and the bottom of the circular plate is welded to the top end of the buffer spring.

[0008] Preferably, a connecting plate is connected to the top end of the cylindrical compression bar by bolts, and a positioning short bar is welded to the right side of the top of the connecting plate.

[0009] Preferably, a circular filter screen is placed on the top of the support ring, a sealing ring is placed on the top of the circular filter screen, a cylindrical block is welded to the top of the support ring, and a cylindrical hole is formed in the bottom of the circular filter screen.

[0010] Preferably, a threaded ring is welded to the bottom of the syringe housing, a threaded tube is threadedly connected to the inner wall of the threaded ring, a splash-proof cover is welded to the bottom of the threaded tube, and an injection head is fixedly communicated with the bottom of the syringe housing.

[0011] Preferably, a push rod penetrates through the top of the syringe housing, and a push pressing plate is welded to the top end of the push rod.

[0012] Preferably, a positioning short plate is welded to the left side of the push pressing plate, a piston is connected to the bottom end of the push rod by bolts, and a positioning hole is formed in the top of the positioning short plate.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model is combined with a filter tube, a threaded head, a sealing ring, a circular filter screen and a support ring, and has the advantage of being able to filter impurities in the sample solution. Place the circular filter screen on the support ring, then place the sealing ring on the circular filter screen, make the filter tube contact the threaded head, and rotate the filter tube to connect it with the threaded head, so as to fix the filter tube under the syringe housing. When sucking the sample solution, impurities in it can be filtered, ensuring the accuracy of ion chromatography analysis.

[0015] 2. The present utility model is combined with a cylindrical compression bar, a support shell, a support plate, a connecting plate, a buffer spring and a circular plate, and has the advantage of being able to slow down the downward injection speed. When pressing the push pressing plate for injection, the positioning short plate applies pressure to the connecting plate, so that the cylindrical compression bar descends, enabling the circular plate to apply pressure to the buffer spring and making the buffer spring contract. Under the action of the buffer spring, the downward movement speed of the push rod can be effectively slowed down, thus effectively preventing the pressing injection speed from being too fast and affecting the subsequent ion chromatography analysis effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 2 is a front exploded three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 3 Schematic diagram of the three-dimensional structure of the partial explosion of the present utility model;

[0019] Figure 4 Schematic diagram of the three-dimensional structure of the explosion of the buffer component of the present utility model;

[0020] Figure 5 Schematic diagram of the three-dimensional structure of the explosion of the filter component of the present utility model;

[0021] Figure 6 For the present utility model Figure 4 Enlarged structure diagram of A in

[0022] In the figure: 1, syringe housing; 2, push rod; 3, push pressure plate; 4, positioning short board; 5, buffer component; 501, cylindrical pressure rod; 502, support shell; 503, support plate; 504, connecting plate; 505, buffer spring; 506, circular plate; 6, filter component; 601, filter tube; 602, threaded head; 603, sealing ring; 604, circular filter screen; 605, support ring; 7, anti-splash cover; 8, piston; 9, threaded ring; 10, threaded tube; 11, injection head. Specific implementation mode

[0023] Please refer to Figures 1-6 , an ion chromatography sample pretreatment pressurized syringe for environmental detection, including a syringe housing 1, a buffer component 5 is installed on the surface of the syringe housing 1, the buffer component 5 includes a support plate 503, by setting the support plate 503, the support shell 502 can be supported, so that the support shell 502 can be fixed on the left side of the syringe housing 1, the right side of the support plate 503 is welded to the left side of the syringe housing 1, the top of the support plate 503 is bolted to the support shell 502, a buffer spring 505 is welded to the bottom of the inner cavity of the support shell 502, a filter component 6 is installed at the bottom of the syringe housing 1, the filter component 6 includes a threaded head 602, the top of the threaded head 602 is welded to the bottom of the syringe housing 1, a filter tube 601 is threadedly sleeved on the surface of the threaded head 602, and a support ring 605 is welded to the bottom of the inner cavity of the filter tube 601;

[0024] Please refer to Figure 1 , Figure 4 and Figure 6 , a cylindrical pressure rod 501 penetrates through the top of the support shell 502, a circular plate 506 is welded to the bottom end of the cylindrical pressure rod 501, by setting the circular plate 506, when the cylindrical pressure rod 501 moves downward, the buffer spring 505 can be squeezed to contract, and the bottom of the circular plate 506 is welded to the top end of the buffer spring 505;

[0025] Please refer to Figure 1 , Figure 4 and Figure 6, the top of the cylindrical compression bar 501 is connected with a connecting plate 504 by bolts, and a positioning short rod is welded to the right side of the top of the connecting plate 504;

[0026] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 , a circular filter screen 604 is placed on the top of the support ring 605, and a sealing ring 603 is placed on the top of the circular filter screen 604. By setting the sealing ring 603, after the filter pipe 601 and the threaded head 602 are connected, the sealing performance of the connection between the filter pipe 601 and the threaded head 602 can be improved. A cylindrical block is welded to the top of the support ring 605, and a cylindrical hole is opened at the bottom of the circular filter screen 604;

[0027] Please refer to Figure 3 , a threaded ring 9 is welded to the bottom of the syringe housing 1. By setting the threaded ring 9, the threaded pipe 10 can be connected, so that the anti-splash cover 7 can be fixed to the bottom of the syringe housing 1. The inner wall of the threaded ring 9 is threadedly connected with the threaded pipe 10, and the bottom of the threaded pipe 10 is welded with the anti-splash cover 7. By setting the anti-splash cover 7, when injecting the sample solution, the sample solution can be effectively prevented from splashing. The bottom of the syringe housing 1 is fixedly communicated with an injection head 11;

[0028] Please refer to Figure 1 and Figure 2 , a push rod 2 is arranged through the top of the syringe housing 1, and a push pressing plate 3 is welded to the top end of the push rod 2;

[0029] Please refer to Figure 1 and Figure 2 , a positioning short plate 4 is welded to the left side of the push pressing plate 3, the bottom end of the push rod 2 is connected with a piston 8 by bolts, and a positioning hole is opened at the top of the positioning short plate 4.

[0030] During use, place the circular filter screen 604 on the support ring 605 inside the filter tube 601, then place the sealing ring 603 on the circular filter screen 604. Make the filter tube 601 contact the threaded head 602 and rotate the filter tube 601 so that it can be fixed at the bottom of the syringe housing 1. When sucking the sample, press down the push plate 3 to drive the push rod 2 to drive the piston 8 to descend, immerse the filter tube 601 into the sample solution, and pull up the push plate 3 to drive the push rod 2 to drive the piston 8 to move upward, thereby sucking the sample solution. When sucking, the circular filter screen 604 can filter the impurities in the sample solution, so that there are no impurities remaining in the sucked sample solution, effectively ensuring the accuracy of the data during ion chromatography analysis and improving the precision of ion chromatography analysis. When injection is required, remove the filter tube 601 and press the push plate 3 to drive the push rod 2 to drive the piston 8 to descend, thereby injecting the sample solution. When pressing for injection, the positioning short plate 4 presses the connecting plate 504 to drive the cylindrical pressure rod 501 to descend, so that the circular plate 506 squeezes the buffer spring 505. Under the tension of the buffer spring 505, the descending speed of the push rod 2 can be effectively slowed down, thereby preventing the generation of bubbles due to too fast pressing injection speed and improving the effect of subsequent ion chromatography analysis.

[0031] In summary, the pressurized syringe for ion chromatography sample pretreatment in environmental detection solves the problems of not being able to filter impurities in the sample solution and not being able to slow down the downward pressing injection speed through the cooperation of the filter tube 601, threaded head 602, sealing ring 603, circular filter screen 604, support ring 605, cylindrical pressure rod 501, support shell 502, support plate 503, connecting plate 504, buffer spring 505 and circular plate 506.

Claims

1. An ion chromatography sample pretreatment pressurized syringe for environmental testing, comprising a syringe housing (1), characterized in that: A buffer assembly (5) is mounted on the surface of the syringe housing (1), the buffer assembly (5) comprising a support plate (503), the right side of the support plate (503) being welded to the left side of the syringe housing (1), the top of the support plate (503) being connected to a support shell (502) via bolts, the bottom of the inner cavity of the support shell (502) being welded to a buffer spring (505), a filter assembly (6) being mounted on the bottom of the syringe housing (1), the filter assembly (6) comprising a threaded head (602), the top of the threaded head (602) being welded to the bottom of the syringe housing (1), a filter tube (601) being threadedly sleeved on the surface of the threaded head (602), and a support ring (605) being welded to the bottom of the inner cavity of the filter tube (601).

2. The ion chromatography sample pretreatment pressurized syringe for environmental detection according to claim 1, characterized in that: A cylindrical pressure rod (501) is provided through the top of the support shell (502), a circular plate (506) is welded to the bottom end of the cylindrical pressure rod (501), and the bottom of the circular plate (506) is welded to the top end of the buffer spring (505).

3. The ion chromatography sample pretreatment pressurized syringe for environmental detection according to claim 2, characterized in that: The top end of the cylindrical pressure rod (501) is connected to a connecting plate (504) via bolts, and a positioning short rod is welded to the right side of the top of the connecting plate (504).

4. The ion chromatography sample pretreatment pressurized syringe for environmental detection according to claim 1, characterized in that: A circular filter screen (604) is placed on the top of the support ring (605), a sealing ring (603) is placed on the top of the circular filter screen (604), a cylindrical block is welded to the top of the support ring (605), and a cylindrical hole is opened at the bottom of the circular filter screen (604).

5. The ion chromatography sample pretreatment pressurized syringe for environmental detection according to claim 1, characterized in that: A threaded ring (9) is welded to the bottom of the syringe housing (1), a threaded tube (10) is threadedly connected to the inner wall of the threaded ring (9), a splash-proof cover (7) is welded to the bottom of the threaded tube (10), and an injection head (11) is fixedly connected to the bottom of the syringe housing (1).

6. The ion chromatography sample pretreatment pressurized syringe for environmental detection according to claim 1, characterized in that: A push rod (2) is provided through the top of the syringe housing (1), and a push pressing plate (3) is welded to the top end of the push rod (2).

7. The ion chromatography sample pretreatment pressurized syringe for environmental detection according to claim 6, characterized in that: A positioning short plate (4) is welded to the left side of the push plate (3), a piston (8) is connected to the bottom end of the push rod (2) via bolts, and a positioning hole is provided at the top of the positioning short plate (4).

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