An assembled flow cell detection device

Abstract

The application discloses an assembled flow cell detection device, which comprises a flow cell and a detection tool matched with the flow cell, wherein the flow cell comprises a flow cell main body, a flow hole is arranged in the middle of the flow cell main body, the flow cell main body is press-connected on a positioning reference plate through a flow cell shell, an avoiding hole is arranged on the positioning reference plate and the flow cell shell, and a guide spring is arranged on the positioning reference plate; the detection tool comprises a positioning seat, a positioning mechanism for spigot fitting with the positioning reference plate is fixedly arranged on the positioning seat, a sliding block is movably arranged on the positioning seat, a guide hole for spigot fitting with the guide spring is arranged on the sliding block, and a detection sensor is arranged on the sliding block; the detection tool of the scheme can be compatible with the flow cell within a certain optical path length range, and the flow cell with different optical path lengths can be conveniently replaced, so that the compatibility and practicability of the scheme for detecting the flow cell are improved, and the detection cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid phase detection, and in particular to an assembled flow cell detection device. Background Art

[0002] The detection principle of the UV detector is based on the Lambert-Beer law. The absorbance of the absorbing substance is related to the substance concentration and the optical path length of the flow cell. The longer the optical path, the higher the signal generated and the higher the signal-to-noise ratio. It is suitable for analytical liquid chromatography, and short optical path is mostly used for preparative liquid chromatography.

[0003] The flow cell structure is a core component of the detector, and the processing precision requirements are extremely high. Most flow cells on the market are formed in one piece, and the processing technology of the flow cell is complex and the cost is high. The light inlet and outlet of the flow cell of the conventional detector adopts flat windows, and the light output is divergent, and the energy utilization rate is low. At the same time, different optical path flow cells make the structural length of the flow cell different, and the distance occupied in the optical system is different, and the positioning reference is difficult to unify. In addition, the sensor behind the flow cell needs to adjust the distance according to the length of the flow cell. Therefore, it is necessary to equip detector equipment with different structures and specifications to meet the detection requirements of flow cells with different optical path lengths, resulting in poor compatibility of the detector. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides an assembled flow cell detection device to solve the technical problems mentioned in the above-mentioned background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] Provided is an assembled circulation pool detection device, which includes a circulation pool and a detection tooling that is aligned with the circulation pool. The circulation pool includes a circulation pool body, a circulation hole is provided in the middle of the circulation pool body, and the front and rear ports of the circulation hole are connected to the liquid inlet and outlet joints on the liquid supply shell through an inlet pipe and an outlet pipe respectively. The circulation pool body is pressed onto a positioning reference plate through a circulation pool shell, and avoidance holes that are respectively connected to the front and rear ports of the circulation hole are provided on the positioning reference plate and the circulation pool shell. Transparent parts for sealing the front and rear ports of the circulation hole are pressed into the two avoidance holes, and a guide spring is provided on the positioning reference plate; the detection tooling includes a positioning seat, a positioning mechanism for socket-fitting with the positioning reference plate is fixedly provided on the positioning seat, a sliding block is movably provided on the positioning seat, the sliding block is provided with a guide hole for socket-fitting with the guide spring, a detection sensor is provided on the sliding block, and the detection sensor is tightly fitted with the avoidance hole of the circulation pool shell under the guiding action of the guide spring.

[0007] Furthermore, sealing rings are provided between the two transparent parts and the front and rear ports of the circulation hole respectively, and a liquid inlet channel and a liquid outlet channel are provided on one side of the front and rear ports of the circulation hole respectively. One end of the liquid inlet channel and the liquid outlet channel are connected to the front and rear ports of the circulation hole respectively through the gap space in the middle of the sealing ring, and the other end of the liquid inlet channel and the liquid outlet channel are connected to the liquid inlet pipe and the liquid outlet pipe respectively.

[0008] Furthermore, the two transparent parts are a flat window piece and a flat convex lens respectively, the avoidance hole is a threaded hole, and a clamping nut is fitted in the threaded hole. The two clamping nuts press the flat window piece and the flat convex lens at the front and rear ports of the flow hole respectively, and a flat window pressing sleeve and a lens pressing sleeve are respectively provided between the clamping nut and the flat window piece and between the clamping nut and the flat convex lens.

[0009] Furthermore, the positioning mechanism includes two guide bars that are respectively slidably fitted with the upper and lower end surfaces of the positioning reference plate, and both guide bars are provided with a compression spring that is slidably fitted with the side surface of the positioning reference plate.

[0010] Furthermore, the positioning reference plate is connected to the liquid supply housing through a serpentine spring. Two positioning pins are provided on the liquid supply housing. The compression spring is fixedly pressed on the guide bar through a mounting bar. One end of the two mounting bars is provided with a positioning hole that fits with the socket.

[0011] Furthermore, the guide spring includes a flat rib, which is located at the end of the circulation pool shell away from the positioning reference plate. The front end of the flat rib is provided with an oblique rib, and the two ends of the guide hole are provided with guide notches that are convenient for socket fitting with the oblique rib.

[0012] Furthermore, a mounting seat is provided on the positioning seat, a guide block is provided on the mounting seat, a guide rail that slides with the guide block is provided on the sliding block, and a tension spring is provided between the sliding block and the mounting seat.

[0013] Furthermore, the circulation pool shell is mounted on the circulation pool body, and one end of the circulation pool body abuts against one end of the circulation pool shell, and the other end of the circulation pool body abuts against the positioning reference plate, and the other end of the circulation pool shell is fastened to the positioning reference plate by bolts.

[0014] Furthermore, the flow hole is a tapered hole whose radial dimension gradually increases from the front end to the rear end.

[0015] Furthermore, a liquid leakage receiving pan located below the circulation pool body is provided on the positioning seat.

[0016] The beneficial effects of the present invention are:

[0017] 1. The circulation cell of the present scheme adopts an assembled structure design, which is convenient to disassemble and assemble, thereby greatly reducing the processing difficulty and processing cost of the circulation cell. When a circulation cell with a different optical path length is needed, only the circulation cell body, the circulation cell shell and the guide spring of the corresponding size need to be replaced; at the same time, the circulation hole of the present scheme is used as a light transmission hole and adopts the way of small hole into large hole, which reduces light diffusion and absorption of the cell wall to light; the light outlet of the circulation hole adopts a plano-convex lens to condense light, thereby reducing the divergence angle of the outgoing light and improving the utilization rate of light; in addition, the front and rear ports of the circulation hole are connected with the liquid inlet pipe and the liquid outlet pipe through the sealing ring piece, respectively, while not affecting the light transmission of the circulation hole.

[0018] 2. In the detection assembly of the present scheme, the positioning reference plate is gradually inserted along the guide strip and provides a pre-tightening force through the compression spring piece, at the same time, the guide spring is inserted into the guide hole on the sliding block, and under the guidance of the guide spring, the detection sensor is automatically close to the avoidance hole of the circulation cell shell until the detection sensor is tightly fitted with the avoidance hole, so that the distance after the light of the circulation hole is out is kept consistent, thereby ensuring that the light collection size is the same; at the same time, the present scheme takes the positioning reference plate as the positioning reference, and takes the light inlet of the circulation hole as the positioning focus, to ensure that the light inlet of the circulation cell with different optical path lengths is at the focus of the light spot.

[0019] 3. The detection tool of the present scheme can be compatible with the circulation cell within a certain range of optical path length, and the circulation cell with different optical path length is convenient to replace, thereby improving the compatibility and practicality of the present scheme for the detection of the circulation cell, and further reducing the model of the integrated circulation cell and the detection tool, and reducing the detection cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of a circulation cell.

[0021] Figure 2 is an exploded view of a circulation cell.

[0022] Figure 3 is a sectional view of a circulation cell.

[0023] Figure 4 is Figure 3 is an enlarged view of area A in FIG.

[0024] Figure 5 is a structural schematic diagram of a circulation cell and a detection tool.

[0025] Figure 6 is a sectional view in Figure 5

[0026] Figure 7 is a partial structure diagram of a positioning seat.

[0027] Figure 8 is a structural schematic diagram of a sliding block.​

[0028] Figure 9 Schematic diagram of the socket-fitting process between the guide spring and the guide hole.

[0029] Among them, 1. circulation pool body, 2. circulation hole, 3. circulation pool shell, 4. positioning reference plate, 5. flat window, 6. flat convex lens, 7. avoidance hole, 8. tightening nut, 9. flat window sleeve, 10. lens sleeve, 11. liquid inlet pipe, 12. liquid outlet pipe, 13. liquid supply shell, 14. liquid inlet and outlet joints, 15. sealing ring, 16. liquid inlet channel, 17. liquid outlet channel, 18. positioning seat, 19. guide strip, 20. pressing spring, 21. sliding block, 22. mounting seat, 23. guide block, 24. guide rail, 25. tension spring, 26. guide spring, 27. guide hole, 28. detection sensor, 29. flat rib, 30. oblique rib, 31. guide notch, 32. guide positioning groove, 33. serpentine spring, 34. positioning pin, 35. mounting strip, 36. positioning hole, 37. leakage receiving tray. DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.

[0031] The assembled flow cell detection equipment of this solution includes a flow cell and a detection tooling that is aligned with the flow cell.

[0032] like Figures 1 to 4 As shown, the circulation pool includes a circulation pool body 1, a circulation hole 2 is provided in the middle of the circulation pool body 1, and the circulation pool body 1 is pressed onto the positioning reference plate 4 through the circulation pool shell 3. During implementation, the circulation pool shell 3 is fixedly sleeved on the circulation pool body 1, and one end of the circulation pool body 1 is abutted against one end of the circulation pool shell 3, and the other end of the circulation pool body 1 is abutted against the positioning reference plate 4, and the other end of the circulation pool shell 3 is fastened to the positioning reference plate 4 by bolts; this arrangement makes it easy to disassemble and assemble the circulation pool body 1 and the circulation pool shell 3, thereby greatly reducing the processing difficulty and processing cost of processing the circulation pool. When a circulation pool with a different optical path length is required, it is only necessary to replace the circulation pool body 1, the circulation pool shell 3 and the guide spring 26 of the corresponding size.

[0033] The positioning reference plate 4 and the circulation cell housing 3 are provided with avoidance holes 7 which are respectively connected to the front and rear ports of the circulation hole 2. Transparent parts for blocking the front and rear ports of the circulation hole 2 are pressed into the two avoidance holes 7.

[0034] As an optional embodiment, the flow hole 2 is a tapered hole with radial dimensions gradually increasing from the front end to the rear end; the flow hole 2 is used as a light-through hole and adopts a small hole in and large hole out method to reduce light diffusion and light absorption by the pool wall.

[0035] As an optional implementation, the two transparent parts are a flat window piece 5 and a plano-convex lens 6, the avoidance hole 7 is a threaded hole, and a clamping nut 8 is fitted in the threaded hole. The two clamping nuts 8 respectively press the flat window piece 5 and the plano-convex lens 6 at the front and rear ports of the circulation hole 2. The light outlet of the circulation hole 2 adopts the plano-convex lens 6 to focus the light, thereby reducing the divergence angle of the light and improving the light utilization rate; and a flat window pressing sleeve 9 and a lens pressing sleeve 10 are respectively provided between the clamping nut 8 and the flat window piece 5 and between the clamping nut 8 and the plano-convex lens 6, so as to achieve a stable pressing connection between the flat window piece 5 and the plano-convex lens 6.

[0036] As an optional embodiment, the front and rear ports of the circulation hole 2 are connected to the liquid inlet and outlet joints 14 on the liquid supply shell 13 through the liquid inlet pipe 11 and the liquid outlet pipe 12 respectively. During specific implementation, a sealing ring piece 15 is provided between the flat window piece 5 and the plano-convex lens 6 and the front and rear ports of the circulation hole 2 respectively. A liquid inlet channel 16 and a liquid outlet channel 17 are provided on one side of the front and rear ports of the circulation hole 2 respectively. One end of the liquid inlet channel 16 and the liquid outlet channel 17 are connected to the front and rear ports of the circulation hole 2 respectively through the gap space in the middle of the sealing ring piece 15, and the other end of the liquid inlet channel 16 and the liquid outlet channel 17 are connected to the liquid inlet pipe 11 and the liquid outlet pipe 12 respectively. This scheme realizes the connection of the circulation hole 2 with the circulation circuit while the circulation circuit does not affect the light transmittance of the circulation hole 2.

[0037] like Figures 5 to 9 The inspection tooling shown includes a positioning seat 18, on which is fixedly provided a positioning mechanism for socket-fitting with the positioning reference plate 4, and the positioning mechanism includes two guide bars 19 respectively slidingly fitted with the upper and lower end surfaces of the positioning reference plate 4, and both guide bars 19 are provided with a clamping spring 20 slidingly abutting against the side of the positioning reference plate 4; a sliding block 21 is movably provided on the positioning seat 18, specifically, a mounting seat 22 is provided on the positioning seat 18, a guide block 23 is provided on the mounting seat 22, a guide rail 24 slidingly fitted with the guide block 23 is provided on the sliding block 21, and a tension spring 25 is provided between the sliding block 21 and the mounting seat 22.

[0038] A guide spring 26 is provided on the positioning reference plate 4, and a guide hole 27 for socket-fitting with the guide spring 26 is provided on the sliding block 21. A detection sensor 28 is provided on the sliding block 21, and the detection sensor 28 is tightly fitted with the avoidance hole 7 of the circulation pool housing 3 under the guiding action of the guide spring 26.

[0039] As an optional embodiment, the guide spring 26 includes a flat rib 29, which is located at the end of the circulation pool housing 3 away from the positioning reference plate 4. The front end of the flat rib 29 is provided with an oblique rib 30, and the two ends of the guide hole 27 are provided with guide notches 31 for facilitating the socket fit with the oblique rib 30, so as to facilitate the socket fit between the oblique rib 30 and the flat rib 29 and the guide hole 27.

[0040] The following is a detailed description of the working process of this program:

[0041] During the detection and assembly, the positioning reference plate 4 is gradually inserted along the guide strip 19 and a pre-tightening force is provided by pressing the spring 20. At the same time, the oblique rib 30 is inserted into the guide hole 27 on the sliding block 21. Under the guiding action of the oblique rib 30, the detection sensor 28 on the sliding block 21 is automatically close to the avoidance hole 7 of the flow cell housing 3. When the guide hole 27 on the sliding block 21 slides onto the flat rib 29, the detection sensor 28 fits tightly with the avoidance hole 7. This arrangement realizes the automatic alignment of the detection sensor 28, so that the flow cell housing 3 can be easily detected. The distance after the light comes out of the through hole 2 remains consistent, thereby ensuring that the size of the light received is the same; at the same time, this solution uniformly uses the positioning reference plate 4 as the positioning reference, and the light inlet of the circulation hole 2 as the positioning focus, to ensure that the light inlets of the circulation pools with different optical path lengths are all at the focus of the light spot; when the circulation pool needs to be removed, the positioning reference plate 4 is gradually pulled out along the guide bar 19, and the guide spring 26 is automatically retracted, so that the sliding block 21 gradually moves away from the circulation pool housing 3, and after the circulation pool is completely pulled out, the sliding block 21 automatically rebounds to the farthest point under the action of the tension spring 25.

[0042] As an optional embodiment, the positioning seat 18 is provided with a guide positioning groove 32 that cooperates with the protrusion on the back side of the positioning reference plate 4 to realize the positioning of the positioning seat 18 and the positioning reference plate 4; the positioning reference plate 4 is connected to the liquid supply shell 13 through a serpentine spring 33, and two positioning pins 34 are provided on the liquid supply shell 13. The clamping spring 20 is fixedly pressed on the guide bar 19 through the mounting bar 35, and one end of the two mounting bars 35 is provided with a positioning hole 36 that cooperates with the socket to realize the positioning of the liquid supply shell 13 and the positioning seat 18, thereby improving the accuracy of assembly alignment.

[0043] As an optional embodiment, a liquid leakage receiving pan 37 located below the circulation cell body 1 is provided on the positioning seat 18 .

[0044] In summary, the detection tooling of this solution is compatible with flow cells within a certain optical path length range, and the flow cells of different optical path lengths of this solution are easy to replace, thereby improving the compatibility and practicality of this solution for flow cell detection, and further reducing the models of integrated flow cells and detection tooling, thereby reducing detection costs.

Claims

1. An assembled flow cell detection device, characterized in that: The invention comprises a flow cell and a detection tooling matched with the flow cell, wherein the flow cell comprises a flow cell body, a flow hole is provided in the middle of the flow cell body, the front and rear ports of the flow hole are connected to the liquid inlet and outlet joints on the liquid supply housing through a liquid inlet pipe and a liquid outlet pipe respectively, the flow cell body is pressed onto the positioning reference plate through the flow cell housing, the positioning reference plate and the flow cell housing are provided with avoidance holes respectively docked with the front and rear ports of the flow hole, transparent parts for blocking the front and rear ports of the flow hole are pressed into the two avoidance holes, and a guide spring is provided on the positioning reference plate; The detection tooling includes a positioning seat, on which is fixedly provided a positioning mechanism for socket-fitting with the positioning reference plate, a sliding block movably provided on the positioning seat, a guide hole for socket-fitting with the guide spring sheet provided on the sliding block, a detection sensor provided on the sliding block, and the detection sensor is tightly fitted with the avoidance hole of the circulation pool shell under the guiding action of the guide spring sheet.

2. The assembled flow cell detection device according to claim 1, characterized in that: Sealing rings are provided between the two transparent parts and the front and rear ports of the circulation hole respectively. A liquid inlet channel and a liquid outlet channel are provided on one side of the front and rear ports of the circulation hole respectively. One end of the liquid inlet channel and the liquid outlet channel are connected to the front and rear ports of the circulation hole respectively through the gap space in the middle of the sealing ring, and the other end of the liquid inlet channel and the liquid outlet channel are connected to the liquid inlet pipe and the liquid outlet pipe respectively.

3. The assembled flow cell detection device according to claim 1 or 2, characterized in that: The two transparent parts are respectively a flat window piece and a flat convex lens, the avoidance hole is a threaded hole, and a clamping nut is fitted in the threaded hole. The two clamping nuts respectively press the flat window piece and the flat convex lens at the front and rear ports of the flow hole, and a flat window pressing sleeve and a lens pressing sleeve are respectively provided between the clamping nut and the flat window piece and between the clamping nut and the flat convex lens.

4. The assembled flow cell detection device according to claim 1, characterized in that: The positioning mechanism includes two guide bars that are respectively slidably fitted with the upper and lower end surfaces of the positioning reference plate, and both guide bars are provided with a compression spring that is slidably fitted with the side surface of the positioning reference plate.

5. The assembled flow cell detection device according to claim 4, characterized in that: The positioning reference plate is connected to the liquid supply housing through a serpentine spring. Two positioning pins are provided on the liquid supply housing. The clamping spring is fixedly pressed on the guide bar through a mounting bar. One end of the two mounting bars is provided with a positioning hole that fits with the socket.

6. The assembled flow cell detection device according to claim 1, characterized in that: The guide spring includes a flat rib, which is located at one end of the circulation pool housing away from the positioning reference plate. The front end of the flat rib is provided with an oblique rib, and the two ends of the guide hole are provided with guide notches that are convenient for socket fitting with the oblique rib.

7. The assembled flow cell detection device according to claim 1, characterized in that: The positioning seat is provided with a mounting seat, the mounting seat is provided with a guide block, the sliding block is provided with a guide rail that slides with the guide block, and a tension spring is provided between the sliding block and the mounting seat.

8. The assembled flow cell detection device according to claim 1, characterized in that: The circulation pool shell is mounted on the circulation pool body, and one end of the circulation pool body abuts against one end of the circulation pool shell, the other end of the circulation pool body abuts against the positioning reference plate, and the other end of the circulation pool shell is fastened to the positioning reference plate by bolts.

9. The assembled flow cell detection device according to claim 1, characterized in that: The flow hole is a tapered hole whose radial dimension gradually increases from the front end to the rear end.

10. The assembled flow cell detection device according to claim 1, characterized in that: The positioning seat is provided with a liquid leakage receiving tray located below the circulation pool body.

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