A photochemical derivatization instrument optical path calibration device

Abstract

This utility model belongs to the field of photochemical derivatization technology, and in particular, it is a photochemical derivatization optical path calibration device. It includes a base placed at the optical path output end of the photochemical derivatization device, a leveling mechanism on the base, a lens on the top of the base, a precision adjustment mechanism between the lens and the base, a calibration reference plate on the top of the base, a standard optical path calibration hole on one side of the calibration reference plate, and a light intensity detection device fixedly connected to the top of the base. This utility model has a reasonable structural design. Through the rational arrangement of the base, light intensity detection device, precision adjustment mechanism, and easily detachable calibration reference plate, it achieves precise calibration of the photochemical derivatization device's optical path. The calibration reference plate provides a calibration standard, and combined with the precise detection of the light intensity detection device and the fine adjustment of the precision adjustment mechanism, the accuracy and reliability of the optical path calibration are ensured.

Description

Technical Field

[0001] This utility model relates to the field of photochemical derivatization instrument technology, and in particular to an optical path calibration device for a photochemical derivatization instrument. Background Technology

[0002] Photochemical derivatizers are commonly used auxiliary devices in high-performance liquid chromatography (HPLC). They induce photochemical reactions in analytes through irradiation with light of specific wavelengths, generating derivatives with stronger detection signals, thereby improving analytical sensitivity and selectivity. During the use of photochemical derivatizers, the accuracy and stability of the optical path are crucial, directly affecting derivatization efficiency and the reliability of analytical results. However, after prolonged use, the optical path of existing photochemical derivatizers may shift or scatter, leading to uneven light energy distribution and affecting derivatization effects. Current calibration devices for the optical path of photochemical derivatizers suffer from problems such as complex structure, cumbersome calibration operations, and low calibration accuracy, making it difficult to meet practical needs. Therefore, we propose a photochemical derivatizer optical path calibration device to address these issues. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings mentioned above by providing an optical path calibration device for a photochemical derivatizer.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A photochemical derivatization instrument optical path calibration device includes a base placed at the optical path output end of the photochemical derivatization instrument. A leveling mechanism is provided on the base. A lens is provided on the top of the base. A precision adjustment mechanism is provided between the lens and the base. A calibration reference plate is provided on the top of the base. A standard optical path calibration hole is opened on one side of the calibration reference plate. A light intensity detection device is fixedly connected to the top of the base. A light sensor is fixedly connected to one side of the light intensity detection device. A signal processing module is provided inside the light intensity detection device. A controller is fixedly connected to the other side of the light intensity detection device. A convenient disassembly and assembly mechanism is provided between the calibration reference plate and the base.

[0006] As a preferred embodiment of this utility model, the leveling mechanism includes four adjusting screws threaded to the top of the base and a level fixedly connected to the front side of the base. The bottom end of each adjusting screw is fixedly connected to a support base, and the bottom of the support base is fixedly connected to an anti-slip rubber pad.

[0007] As a preferred embodiment of this invention, a handwheel is fixedly connected to the top end of the adjusting screw.

[0008] In a preferred embodiment of this invention, the precision adjustment mechanism includes a groove formed at the bottom of the base. A lower high-precision lead screw is rotatably connected to the inner walls of both sides of the groove. A slider is threaded onto the outer side of the lower high-precision lead screw. A movable plate is fixedly connected to the top of the slider. Two housings are fixedly connected to the top of the movable plate. A lifting plate is slidably fitted inside the housing. Both lifting plates are fixedly connected to the bottom of the lens. A common top plate is fixedly connected between the two lifting plates. A common horizontal plate is fixedly connected between the two housings. A threaded sleeve is threaded onto the bottom of the horizontal plate. An upper high-precision lead screw is threaded onto the inner side of the threaded sleeve. The top end of the upper high-precision lead screw is fixedly connected to the bottom of the top plate.

[0009] As a preferred embodiment of this utility model, a knob is fixedly connected to one end of the lower high-precision lead screw, and four handles are fixedly connected to the outer side of the threaded sleeve.

[0010] As a preferred embodiment of this utility model, the top of the base is provided with a lower scale line, and one side of the rear lifting plate is provided with an upper scale line.

[0011] As a preferred embodiment of this utility model, the convenient disassembly and assembly mechanism includes two through holes at the bottom of the calibration reference plate and two rotating rods rotatably connected to the top of the base. An external gear is fixedly connected to the bottom end of each rotating rod. An internal gear ring is rotatably connected to the inner wall of the bottom of the base. The internal gear ring meshes with the two external gears. A torsion spring is fixedly connected between the external gears and the base. Limiting openings are provided on the inner walls of both sides of the through holes. Limiting blocks are fixedly connected to the front and rear sides of each rotating rod. All four limiting blocks movably abut against the inner wall of the bottom of the calibration reference plate.

[0012] As a preferred embodiment of this utility model, a support bearing is fixedly connected to the bottom inner wall of the base, and the internal gear ring is fixedly sleeved inside the inner ring of the support bearing.

[0013] In this invention, a photochemical derivatizer optical path calibration device is placed at the optical path output end of the photochemical derivatizer. The corresponding adjusting screw can be adjusted by the level indicator in the leveling mechanism to adjust the levelness of the base. Then, rotating one rotating rod, through the meshing of the external gear and internal gear ring, drives two rotating rods to rotate. The two rotating rods drive four limiting blocks to align with the limiting openings. The calibration reference plate is placed on the outside of the two rotating rods, causing the limiting blocks to slide out of the limiting openings. At this time, the limiting blocks are no longer restricted by the limiting openings. Under the torque of the torsion spring, the limiting blocks rotate to the front and rear sides to abut against the bottom inner wall of the calibration reference plate, thereby locking the calibration reference plate. This allows the light emitted by the photochemical derivatizer to shine through the standard optical path calibration hole on the calibration reference plate onto the light sensor on the light intensity detection device. The operator can view the light intensity data detected by the light intensity detection device through the controller.

[0014] In this invention, a photochemical derivatization instrument optical path calibration device is described. If the light intensity data does not meet the standard requirements, rotating the lower high-precision lead screw drives the slider, moving plate, and lens to move precisely laterally. The position of the lens can be precisely adjusted via the lower scale line. Rotating the threaded sleeve drives the upper high-precision lead screw and the top plate to rise and fall. The top plate drives the two lifting plates and the calibration reference plate to rise and fall. The height of the lens can be precisely adjusted via the upper scale line, thereby adjusting the position of the lens to adjust the optical path until the light intensity data detected by the light intensity detection device meets the standard requirements. After calibration, the calibration reference plate can be quickly removed and unloaded through the above steps, and normal photochemical derivatization operation can then be performed.

[0015] This utility model has a reasonable structural design. Through the reasonable arrangement of the base, light intensity detection device, precision adjustment mechanism and easily detachable calibration reference plate, it realizes the precise calibration of the optical path of the photochemical derivatizer. The calibration reference plate provides a calibration benchmark, and the accuracy and reliability of the optical path calibration are ensured by the precise detection of the light intensity detection device and the fine adjustment of the precision adjustment mechanism. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the optical path calibration device for a photochemical derivatizer proposed in this utility model;

[0017] Figure 2 This is a partial cross-sectional view of an optical path calibration device for a photochemical derivatizer proposed in this utility model;

[0018] Figure 3 for Figure 2 A schematic diagram of the structure of part A;

[0019] Figure 4 for Figure 2 A schematic diagram of the structure of part B.

[0020] In the diagram: 1. Base; 2. Leveling mechanism; 3. Light intensity detection device; 4. Light sensor; 5. Precision adjustment mechanism; 6. Lens; 7. Calibration reference plate; 8. Standard optical path calibration hole; 9. Convenient disassembly and assembly mechanism; 10. Controller; 21. Level; 22. Anti-slip rubber pad; 23. Support base; 24. Adjusting screw; 25. Handwheel; 501. Knob; 502. Groove; 503. Lower high-precision screw; 504. Slider; 505. Moving plate; 506. Lower scale line; 507. Jacket; 508. Lifting plate; 509. Horizontal plate; 510. Threaded sleeve; 511. Upper high-precision screw; 512. Top plate; 91. Limit block; 92. Rotating rod; 93. Through hole; 94. Limit port; 95. Torsion spring; 96. Internal gear ring; 97. External gear; 98. Support bearing. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-4 A photochemical derivatization instrument optical path calibration device includes a base 1 placed at the optical path output end of the photochemical derivatization instrument, a leveling mechanism 2 on the base 1, a lens 6 on the top of the base 1, a precision adjustment mechanism 5 between the lens 6 and the base 1, a calibration reference plate 7 on the top of the base 1, a standard optical path calibration hole 8 on one side of the calibration reference plate 7, a light intensity detection device 3 fixedly connected to the top of the base 1, a light sensor 4 fixedly connected to one side of the light intensity detection device 3, a signal processing module inside the light intensity detection device 3, a controller 10 fixedly connected to the other side of the light intensity detection device 3, and a convenient disassembly and assembly mechanism 9 between the calibration reference plate 7 and the base 1.

[0023] Furthermore, refer to Figure 1 and Figure 2 The leveling mechanism 2 includes four adjusting screws 24 threaded to the top of the base 1 and a level 21 fixedly connected to the front side of the base 1. The bottom end of the adjusting screws 24 is fixedly connected to a support 23, the bottom of the support 23 is fixedly connected to an anti-slip rubber pad 22, and the top end of the adjusting screws 24 is fixedly connected to a handwheel 25.

[0024] Using the above scheme: the calibration device is placed at the optical path output end of the photochemical derivatizer. By adjusting the level 21 in the leveling mechanism 2, the corresponding adjusting screw 24 can be adjusted to achieve the purpose of adjusting the level of the base 1.

[0025] Furthermore, refer to Figures 1-3 The precision adjustment mechanism 5 includes a groove 502 at the bottom of the base 1. A lower high-precision lead screw 503 is rotatably connected to the inner walls of both sides of the groove 502. A slider 504 is threaded onto the outer side of the lower high-precision lead screw 503. A movable plate 505 is fixedly connected to the top of the slider 504. Two sleeves 507 are fixedly connected to the top of the movable plate 505. A lifting plate 508 is slidably fitted inside the sleeve 507. Both lifting plates 508 are fixedly connected to the bottom of the lens 6. A top plate 512 is fixedly connected between the two lifting plates 508. A horizontal plate 509 is fixedly connected between the two sleeves 507. A threaded sleeve 510 is threaded onto the bottom of the horizontal plate 509. An upper high-precision lead screw 511 is threaded onto the inside of the threaded sleeve 510. The top of the upper high-precision lead screw 511 is fixedly connected to the bottom of the top plate 512. A lower scale line 506 is provided on the top of the base 1, and an upper scale line is provided on one side of the rear lifting plate 508.

[0026] Using the above scheme: If the light intensity data does not meet the standard requirements, rotating the lower high-precision lead screw 503 drives the slider 504, the moving plate 505, and the lens 6 to move precisely laterally. The position of the lens 6 can be precisely adjusted via the lower scale line 506. Rotating the threaded sleeve 510 drives the upper high-precision lead screw 511 and the top plate 512 to rise and fall. The top plate 512 drives the two lifting plates 508 and the calibration reference plate 7 to rise and fall. The height of the lens 6 can be precisely adjusted via the upper scale line, thereby adjusting the position of the lens 6 to adjust the optical path until the light intensity data detected by the light intensity detection device 3 meets the standard requirements.

[0027] Furthermore, a knob 501 is fixedly connected to one end of the lower high-precision lead screw 503, and four handles are fixedly connected to the outside of the threaded sleeve 510 to facilitate rotation of the threaded sleeve 510 and the lower high-precision lead screw 503.

[0028] Furthermore, refer to Figure 1 , Figure 2 and Figure 4 The convenient disassembly and assembly mechanism 9 includes two through holes 93 at the bottom of the calibration reference plate 7 and two rotating rods 92 rotatably connected to the top of the base 1. An external gear 97 is fixedly connected to the bottom end of the rotating rod 92. An internal gear ring 96 is rotatably connected to the bottom inner wall of the base 1. The internal gear ring 96 meshes with the two external gears 97. The same torsion spring 95 is fixedly connected between the external gears 97 and the base 1. Limiting ports 94 are opened on both sides of the inner wall of the through holes 93. Limiting blocks 91 are fixedly connected to the front and rear sides of the rotating rods 92. All four limiting blocks 91 are movably abutting against the bottom inner wall of the calibration reference plate 7.

[0029] Using the above scheme: Rotating one rotating rod 92, through the meshing of the external gear 97 and the internal gear ring 96, will drive two rotating rods 92 to rotate. The two rotating rods 92 will drive four limiting blocks 91 to align with the limiting openings 94, and the calibration reference plate 7 will be placed on the outside of the two rotating rods 92, causing the limiting blocks 91 to slide out of the limiting openings 94. At this time, the limiting blocks 91 are no longer restricted by the limiting openings 94. Under the torque of the torsion spring 95, the limiting blocks 91 rotate to the front and rear sides to abut against the bottom inner wall of the calibration reference plate 7, thereby locking the calibration reference plate 7. After calibration, through the above steps, the calibration reference plate can be quickly removed and unloaded, and normal photochemical derivatization operations can be performed.

[0030] Furthermore, a support bearing 98 is fixedly connected to the bottom inner wall of the base 1, and an internal gear ring 96 is fixedly sleeved in the inner ring of the support bearing 98 to improve the stability of the rotation of the internal gear ring 96.

[0031] In this invention, during use, the calibration device is placed at the optical path output end of the photochemical derivatizer. The corresponding adjusting screw 24 can be adjusted according to the level indicator 21 in the leveling mechanism 2 to achieve the purpose of adjusting the levelness of the base 1. Then, rotating one rotating rod 92, through the meshing of the external gear 97 and the internal gear ring 96, will drive two rotating rods 92 to rotate. The two rotating rods 92 drive four limiting blocks 91 to align with the limiting openings 94, placing the calibration reference plate 7 on the outside of the two rotating rods 92, causing the limiting blocks 91 to slide out of the limiting openings 94. At this time, the limiting blocks 91 are no longer restricted by the limiting openings 94. Under the torque of the torsion spring 95, the limiting blocks 91 rotate to their front and rear sides to abut against the bottom inner wall of the calibration reference plate 7, thereby locking the calibration reference plate 7. This allows the light emitted by the photochemical derivatizer to irradiate the light intensity detector through the standard optical path calibration hole 8 on the calibration reference plate 7. On the light sensor 4 of the measuring device 3, the operator views the light intensity data detected by the light intensity detection device through the controller 10. If the light intensity data does not meet the standard requirements, the lower high-precision lead screw 503 is rotated, which drives the slider 504, the moving plate 505 and the lens 6 to move precisely laterally. The position of the lens 6 can be precisely adjusted through the lower scale line 506. The threaded sleeve 510 is rotated, which drives the upper high-precision lead screw 511 and the top plate 512 to rise and fall. The top plate 512 drives the two lifting plates 508 and the calibration reference plate 7 to rise and fall. The height of the lens 6 can be precisely adjusted through the upper scale line, and the position of the lens 6 can be adjusted to adjust the optical path until the light intensity data detected by the light intensity detection device 3 meets the standard requirements. After calibration, the calibration reference plate can be quickly removed and unloaded through the above steps, and normal photochemical derivatization operation can be carried out.

[0032] In the specific implementation of this utility model, in order to further improve the accuracy and stability of optical path calibration, a closed-loop feedback control module is provided between the controller 10 and the light intensity detection device 3. When the light beam emitted by the photochemical derivatizer shines on the light sensor 4 through the standard optical path calibration hole 8, the light intensity detection device 3 collects the current light intensity value in real time and transmits the data to the controller 10. The controller 10 has a preset standard light intensity threshold range. If the detected light intensity value is lower or higher than the set threshold, the controller 10 controls the micro motors of the lower high-precision lead screw 503 and the upper high-precision lead screw 511 to automatically adjust through the drive circuit. The lower high-precision lead screw 503 is used to adjust the lateral position of the lens 6 along the base 1, and its adjustment resolution is 0.02mm; the upper high-precision lead screw 511 is used to adjust the height position of the lens 6, and its vertical adjustment resolution is 0.01mm. Through multiple iterative adjustments, until the light intensity value output by the light intensity detection device 3 stabilizes within the standard range, a complete optical path calibration process is completed.

[0033] To ensure the repeatability and consistency of the adjustment process, the lower scale line 506 on the top of the base 1 is laser-engraved, with each scale division corresponding to a displacement of 0.1mm. The upper scale line on the rear lifting plate 508 is also marked using the same process, facilitating manual verification and recording of adjustment parameters. Furthermore, the level 21 is a high-precision electronic bubble level with a measurement accuracy of ±0.01°, and is connected to the display interface of the controller 10 to monitor the leveling status of the base 1 in real time.

[0034] During the installation and removal of the calibration reference plate 7, the convenient disassembly and assembly mechanism 9 enables rapid locking and release. When the operator rotates one of the rotating rods 92, the internal gear ring 96 simultaneously drives the other rotating rod 92 to rotate, ensuring that the two limiting blocks 91 move synchronously and align with the limiting port 94. Subsequently, the calibration reference plate 7 is slid into the through hole 93 along the axial direction of the rotating rod 92, causing the limiting block 91 to disengage from the limiting port 94. Under the action of the torsion spring 95, the limiting block 91 automatically rotates until it is tightly fitted to the bottom inner wall of the calibration reference plate 7, thus achieving mechanical self-locking. This process only requires one-handed operation and takes no more than 10 seconds, greatly improving the operating efficiency of the equipment and solving the problem of cumbersome disassembly and assembly of traditional calibration equipment.

[0035] To further enhance the equipment's adaptability to different laboratory environments, the support base 23 of the base 1 integrates a shock-absorbing and buffering structure, including a combination of multi-layer silicone pads and metal springs, which can effectively isolate external vibration interference and prevent optical path drift caused by environmental disturbances. The anti-slip rubber pad 22 has a coefficient of friction of not less than 0.8, ensuring that the equipment is placed stably on the laboratory table.

[0036] In summary, by introducing a precise adjustment mechanism 5, a closed-loop feedback control system, a high-precision scale reference system, and a quick-release locking structure, this utility model not only solves the technical problems of low calibration accuracy and complex operation in the prior art, but also significantly improves the automation level and human-computer interaction experience of the equipment, making it suitable for various laboratory application scenarios that require high-precision optical calibration.

Claims

1. A photochemical derivatization instrument optical path calibration apparatus, characterized by, The device includes a base (1) placed at the optical output end of a photochemical derivatizer. A leveling mechanism (2) is provided on the base (1). A lens (6) is provided on the top of the base (1). A precision adjustment mechanism (5) is provided between the lens (6) and the base (1). A calibration reference plate (7) is provided on the top of the base (1). A standard optical path calibration hole (8) is provided on one side of the calibration reference plate (7). A light intensity detection device (3) is fixedly connected to the top of the base (1). A light sensor (4) is fixedly connected to one side of the light intensity detection device (3). A signal processing module is provided inside the light intensity detection device (3). A controller (10) is fixedly connected to the other side of the light intensity detection device (3). A convenient disassembly and assembly mechanism (9) is provided between the calibration reference plate (7) and the base (1).

2. The optical path calibration device for a photochemical derivatization instrument according to claim 1, wherein, The leveling mechanism (2) includes four adjusting screws (24) threaded to the top of the base (1) and a level (21) fixedly connected to the front side of the base (1). The bottom end of the adjusting screws (24) is fixedly connected to a support (23), and the bottom of the support (23) is fixedly connected to an anti-slip rubber pad (22).

3. The optical path alignment device for a photochemical derivatization instrument of claim 2, wherein, A handwheel (25) is fixedly connected to the top of the adjusting screw (24).

4. The optical path alignment device for photochemical derivatization instrument according to claim 1, wherein, The precision adjustment mechanism (5) includes a groove (502) formed at the bottom of the base (1). A lower high-precision lead screw (503) is rotatably connected to the inner walls of both sides of the groove (502). A slider (504) is threaded onto the outer side of the lower high-precision lead screw (503). A movable plate (505) is fixedly connected to the top of the slider (504). Two housings (507) are fixedly connected to the top of the movable plate (505). A lifting plate (507) is slidably fitted inside the housing (507). 8) Both lifting plates (508) are fixedly connected to the bottom of the lens (6). The same top plate (512) is fixedly connected between the two lifting plates (508). The same horizontal plate (509) is fixedly connected between the two sleeves (507). A threaded sleeve (510) is threaded on the bottom of the horizontal plate (509). An upper high precision screw (511) is threaded inside the threaded sleeve (510). The top of the upper high precision screw (511) is fixedly connected to the bottom of the top plate (512).

5. The optical path alignment device for a photochemical derivatization instrument of claim 4, wherein, A knob (501) is fixedly connected to one end of the lower high-precision lead screw (503), and four handles are fixedly connected to the outside of the threaded sleeve (510).

6. The optical path alignment device for a photochemical derivatization instrument of claim 4, wherein, The base (1) has a lower scale line (506) on its top and an upper scale line on one side of the rear lifting plate (508).

7. The photochemical derivatization instrument optical path calibration device according to claim 1, characterized in that, The convenient disassembly and assembly mechanism (9) includes two through holes (93) at the bottom of the calibration reference plate (7) and two rotating rods (92) rotatably connected to the top of the base (1). The bottom end of the rotating rod (92) is fixedly connected to an external gear (97). An internal gear ring (96) is rotatably connected to the bottom inner wall of the base (1). The internal gear ring (96) meshes with the two external gears (97). The external gears (97) and the base (1) are fixedly connected to the same torsion spring (95). Limiting ports (94) are opened on both sides of the inner wall of the through holes (93). Limiting blocks (91) are fixedly connected to the front and rear sides of the rotating rod (92). The four limiting blocks (91) are movably abutting against the bottom inner wall of the calibration reference plate (7).

8. The optical path alignment device for a photochemical derivatization instrument of claim 7, wherein, A support bearing (98) is fixedly connected to the bottom inner wall of the base (1), and the internal gear ring (96) is fixedly sleeved in the inner ring of the support bearing (98).

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