Assembly type flow cell detection equipment

Abstract

The invention discloses assembly type flow cell detection equipment which comprises a flow cell and a detection tool matched with the flow cell in an aligned mode, the flow cell comprises a flow cell body, a flow hole is formed in the middle of the flow cell body, and the flow cell body is connected to a positioning datum plate in a pressed mode through a flow cell shell. Avoiding holes are formed in the positioning datum plate and the flow cell shell, and a guide elastic sheet is arranged on the positioning datum plate; the detection tool comprises a positioning seat, the positioning seat is fixedly provided with a positioning mechanism used for being in socket fit with the positioning datum plate, the positioning seat is movably provided with a sliding block, the sliding block is provided with a guide hole used for being in socket fit with the guide elastic piece, and the sliding block is provided with a detection sensor. The detection tool of the scheme can be compatible with the flow cells within a certain optical path length range, and the flow cells with different optical path lengths are convenient to replace, so that the compatibility and the practicability of the scheme on the detection of the flow cells are improved, and the detection cost is reduced.

Description

Technical Field

[0001] The 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 requires extremely high processing precision. 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 a 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 structure length of the flow cell different, and occupy different distances in the optical system, making it difficult to unify the positioning reference, and 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 circulation pool detection device to solve the technical problems mentioned in the above-mentioned background technology.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: Provided is an assembled circulation pool detection device, which comprises a circulation pool and a detection tooling matched with the circulation pool, wherein the circulation pool comprises a circulation pool body, a circulation hole is arranged in the middle of the circulation pool body, the front and rear ports of the circulation hole are respectively connected with the liquid inlet and outlet joints on the liquid supply shell through a liquid inlet pipe and a liquid outlet pipe, the circulation pool body is crimped onto a positioning reference plate through a circulation pool shell, avoidance holes respectively connected with the front and rear ports of the circulation hole are provided on the positioning reference plate and the circulation pool shell, transparent parts for blocking the front and rear ports of the circulation hole are crimped into the two avoidance holes, and a guide spring is arranged on the positioning reference plate; the detection tooling comprises a positioning seat, a positioning mechanism for socket-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 socket-fitting with the guide spring is arranged on the sliding block, a detection sensor is arranged 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.

[0006] Furthermore, sealing ring sheets are respectively arranged between the two transparent parts and the front and rear ports of the circulation hole, and a liquid inlet channel and a liquid outlet channel are respectively arranged on one side of the front and rear ports of the circulation hole. One end of the liquid inlet channel and the liquid outlet channel are respectively connected to the front and rear ports of the circulation hole through the gap space in the middle of the sealing ring sheet, and the other end of the liquid inlet channel and the liquid outlet channel are respectively connected to the liquid inlet pipe and the liquid outlet pipe.

[0007] Furthermore, 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 arranged between the clamping nut and the flat window piece, and between the clamping nut and the flat convex lens.

[0008] Furthermore, the positioning mechanism includes two guide bars which are respectively slidably fitted with the upper and lower end surfaces of the positioning reference plate, and both guide bars are provided with a clamping spring which is slidably fitted with the side surface of the positioning reference plate.

[0009] Furthermore, the positioning reference plate is connected to the liquid supply housing through a serpentine spring leaf, two positioning pins are provided on the liquid supply housing, the clamping spring leaf is fixedly crimped on the guide bar through a mounting bar, and one end of the two mounting bars is provided with a positioning hole that cooperates with the socket.

[0010] Furthermore, the guide spring includes a flat rib, which is located at one end of the circulation pool shell away from the positioning reference plate. An oblique rib is arranged at the front end of the flat rib, and guide notches are provided at the two ends of the guide hole to facilitate socket cooperation with the oblique rib.

[0011] Furthermore, a mounting seat is arranged on the positioning seat, a guide block is arranged on the mounting seat, a guide rail slidingly matched with the guide block is arranged on the sliding block, and a tension spring is arranged between the sliding block and the mounting seat.

[0012] Furthermore, the circulation cell shell is sleeved on the circulation cell body, and one end of the circulation cell body abuts against one end of the circulation cell shell, and the other end of the circulation cell body abuts against the positioning reference plate, and the other end of the circulation cell shell is fastened to the positioning reference plate by bolts.

[0013] Furthermore, the flow hole is a tapered hole whose radial dimension gradually increases from the front end to the rear end.

[0014] Furthermore, a liquid leakage receiving pan located below the circulation pool body is arranged on the positioning seat.

[0015] The beneficial effects of the present invention are: 1. The flow cell of this scheme adopts an assembled structural design, which is easy to disassemble and assemble, thereby greatly reducing the difficulty and cost of processing the flow cell. When a flow cell with a different optical path length is required, it is only necessary to replace the flow cell body, the flow cell shell and the guide spring of the corresponding size; at the same time, the flow hole of this scheme is used as a light-through hole and adopts a small hole in and a large hole out method to reduce light diffusion and the absorption of light by the pool wall; the light outlet of the flow hole adopts a plano-convex lens to focus light, thereby reducing the divergence angle of the light and improving the light utilization rate; in addition, the front and rear ports of the flow hole are connected to the liquid inlet pipe and the liquid outlet pipe respectively through a sealing ring piece, without affecting the light transmittance of the flow hole.

[0016] 2. During the detection and assembly, this solution gradually inserts the positioning reference plate along the guide bar and provides preload force through the compression spring. Meanwhile, the guide spring is inserted into the guide hole on the sliding block. Under the guidance of the guide spring, the detection sensor automatically approaches the avoidance hole of the circulation pool housing until the detection sensor fits tightly against the avoidance hole, so that the distance after the light comes out of the circulation hole remains consistent, thereby ensuring the same light receiving size. At the same time, this solution uniformly uses the positioning reference plate as the positioning reference and the light inlet of the circulation hole as the positioning focus, ensuring that the light inlets of circulation pools with different optical path lengths are at the focus of the light spot.

[0017] 3. The detection tooling of this solution is compatible with flow cells within a certain optical path length range, and flow cells with different optical path lengths can be easily replaced, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the flow cell structure.

[0019] Figure 2 An exploded view of the flow cell.

[0020] Figure 3 A cross-sectional view of the flow cell.

[0021] Figure 4 for Figure 3 Magnified view of area A.

[0022] Figure 5 It is a schematic diagram of the structure of the circulation pool and the detection tooling.

[0023] Figure 6 for Figure 5 Sectional view in .

[0024] Figure 7 This is a partial structural diagram of the positioning seat.

[0025] Figure 8 It is a structural schematic diagram of the sliding block.

[0026] Fig. 9 It is a schematic diagram of the socket-fitting process between the guide spring piece and the guide hole.

[0027] 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. tightening 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 insert edge, 30. oblique insert edge, 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

[0028] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0029] The assembled flow cell detection equipment of this scheme includes a flow cell and a detection tooling matched with the flow cell.

[0030] like Figures 1 to 4 As shown, the circulation cell includes a circulation cell body 1, a circulation hole 2 is arranged in the middle of the circulation cell body 1, and the circulation cell body 1 is crimped on the positioning reference plate 4 through the circulation cell shell 3. In specific implementation, the circulation cell shell 3 is fixedly sleeved on the circulation cell body 1, and one end of the circulation cell body 1 is abutted against one end of the circulation cell shell 3, and the other end of the circulation cell body 1 is abutted against the positioning reference plate 4, and the other end of the circulation cell shell 3 is fastened to the positioning reference plate 4 by bolts; this arrangement makes it easy to disassemble and assemble the circulation cell body 1 and the circulation cell shell 3, thereby greatly reducing the processing difficulty and processing cost of processing the circulation cell. When a circulation cell with a different optical path length is required, it is only necessary to replace the circulation cell body 1, the circulation cell shell 3 and the guide spring 26 of the corresponding size.

[0031] The positioning reference plate 4 and the circulation pool 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 .

[0032] As an optional embodiment, the flow hole 2 is a tapered hole whose radial size gradually increases 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.

[0033] As an optional implementation, the two transparent parts are respectively 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 crimp the flat window piece 5 and the plano-convex lens 6 at the front and rear ports of the circulation hole 2, and 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 arranged 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 crimping of the flat window piece 5 and the plano-convex lens 6.

[0034] As an optional implementation, 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. In specific implementation, sealing ring sheets 15 are respectively arranged between the flat window sheet 5 and the plano-convex lens 6 and the front and rear ports of the circulation hole 2, and one side of the front and rear ports of the circulation hole 2 is respectively provided with a liquid inlet channel 16 and a liquid outlet channel 17, one end of the liquid inlet channel 16 and the liquid outlet channel 17 are respectively connected to the front and rear ports of the circulation hole 2 through the gap space in the middle of the sealing ring sheet 15, and the other ends of the liquid inlet channel 16 and the liquid outlet channel 17 are respectively connected to the liquid inlet pipe 11 and the liquid outlet pipe 12; 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.

[0035] like Figures 5 to 9 The inspection tool shown includes a positioning seat 18, on which is fixedly provided a positioning mechanism for socket-fitting with the positioning reference plate 4, the positioning mechanism including 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 with 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.

[0036] A guide spring 26 is provided on the positioning reference plate 4, 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.

[0037] As an optional embodiment, the guide spring piece 26 includes a flat rib 29, which is located at one end of the circulation pool housing 3 away from the positioning reference plate 4. An oblique rib 30 is provided at the front end of the flat rib 29, and guide notches 31 are provided at both ends of the guide hole 27 to facilitate 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.

[0038] The following is a detailed description of the working process of this program: In the present scheme, during the detection and assembly, the positioning reference plate 4 is gradually inserted along the guide strip 19 and the pre-tightening force is provided by the pressing spring 20. At the same time, the obliquely inserted edge strip 30 is inserted into the guide hole 27 on the sliding block 21. Under the guiding action of the obliquely inserted edge strip 30, the detection sensor 28 on the sliding block 21 is automatically close to the avoidance hole 7 of the circulation cell housing 3. When the guide hole 27 on the sliding block 21 slides onto the flatly inserted edge strip 29, the detection sensor 28 is closely fitted with the avoidance hole 7. This arrangement realizes the automatic alignment and assembly of the detection sensor 28, so that the circulation cell housing 3 can be easily moved. The distance after the light comes out of the through hole 2 remains consistent, thereby ensuring that the size of the collected light is the same; at the same time, this solution uniformly uses the positioning reference plate 4 as the positioning reference, and takes 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 strip 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.

[0039] As an optional embodiment, the positioning seat 18 is provided with a guide positioning groove 32 which 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 crimped on the guide bar 19 through a mounting bar 35. One end of the two mounting bars 35 is provided with a positioning hole 36 which 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.

[0040] As an optional implementation, a leakage receiving plate 37 located below the circulation pool body 1 is provided on the positioning seat 18 .

[0041] In summary, the detection tooling of this scheme is compatible with flow cells within a certain optical path length range, and the flow cells of different optical path lengths of this scheme are easy to replace, thereby improving the compatibility and practicality of this scheme 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 circulation pool and a detection tooling matched with the circulation pool, wherein the circulation pool comprises a circulation pool body, a circulation hole is arranged in the middle of the circulation pool body, the front and rear ports of the circulation hole are respectively connected with the liquid inlet and outlet joints on the liquid supply shell through a liquid inlet pipe and a liquid outlet pipe, the circulation pool body is crimped on the positioning reference plate through the circulation pool shell, the positioning reference plate and the circulation pool shell are provided with avoidance holes respectively connected with the front and rear ports of the circulation hole, transparent parts for blocking the front and rear ports of the circulation hole are crimped in the two avoidance holes, and a guide spring is arranged on the positioning reference plate; The detection tooling includes a positioning seat, on which is fixedly provided a positioning mechanism for socket-fitting with a positioning reference plate, on which is movably provided a sliding block, on which is provided a guide hole for socket-fitting with a guide spring sheet, on which is provided a detection sensor, and the detection sensor is tightly fitted with the avoidance hole of the circulation pool housing 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 arranged 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 arranged 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 with the front and rear ports of the circulation hole 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 with 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 matched 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 arranged 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 comprises two guide bars which are respectively slidably fitted with the upper and lower end surfaces of the positioning reference plate, and the two guide bars are both provided with a clamping spring which 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 leaf, and two positioning pins are arranged on the liquid supply housing. The clamping spring leaf is fixedly pressed on the guide bar through a mounting bar, and one end of the two mounting bars is provided with a positioning hole that cooperates with the socket.

6. The assembled flow cell detection device according to claim 1, characterized in that: The guide spring piece 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 is slidably matched 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 cell shell is sleeved on the circulation cell body, and one end of the circulation cell body abuts against one end of the circulation cell shell, the other end of the circulation cell body abuts against the positioning reference plate, and the other end of the circulation cell 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 plate located below the circulation pool body.

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