Flow cell with adjustable optical path

Abstract

The utility model discloses an optical path adjustable flow cell which comprises a flow cell cavity, two adjusting seats are oppositely arranged in the flow cell cavity, the two adjusting seats are both in threaded connection with the flow cell cavity, lenses are arranged at the opposite ends of the two adjusting seats, compression screws are arranged on the opposite sides, facing the flow cell cavity, of the lenses, and the compression screws are in threaded connection with the flow cell cavity. A connector is arranged at the tail end of the adjusting seat; the optical path adjusting device is simple in structure and reasonable in design, rotary fine adjustment of the optical path is achieved through threaded connection of the adjusting base and the flow cell cavity, the optical path can be adjusted without disassembling and assembling the flow cell, and convenience of experimental operation is improved. The lens and the cavity are directly matched and installed, the parallelism of the lens is ensured, and the detection precision is improved. In addition, a perfluoroether O-shaped sealing ring is adopted, so that the sealing performance is better, the corrosion resistance and the pressure resistance are stronger, and the stability and the reliability of equipment in a complex environment are ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of water quality testing equipment, specifically to a flow cell with adjustable optical path. Background Technology

[0002] Optical detection technology, as a core detection method in fields such as chemical analysis, biological detection, and environmental monitoring, relies heavily on the structural design of the flow cell within the optical components for its performance. Traditional flow cells (such as...) Figure 2 (As shown) It typically consists of a cavity, two lenses, four sealing gaskets, and two clamping components. The cavity contains a narrow slit channel for sample flow. In practical applications, to achieve different optical path requirements, the lens spacing needs to be adjusted by replacing PTFE sealing gaskets of different thicknesses. However, this structure has significant drawbacks: firstly, optical path adjustment relies on manual replacement of the gaskets, making real-time dynamic adjustment impossible; secondly, PTFE gaskets are prone to compression deformation due to their material properties, and combined with inherent defects such as insufficient processing flatness, it is difficult to maintain high-precision parallelism between the two lenses, leading to optical path misalignment and directly affecting the stability and measurement accuracy of optical detection. Utility Model Content

[0003] The purpose of this invention is to provide a flow cell with adjustable optical path to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an optical path adjustable flow cell, comprising a flow cell cavity, wherein two adjustment seats are arranged opposite to each other in the flow cell cavity, both adjustment seats are threadedly connected to the flow cell cavity, and each of the two adjustment seats has a lens at its opposite end. A clamping screw is provided on the opposite side of the lens facing the flow cell cavity, and an interface is provided at the end of the adjustment seat.

[0005] Preferably, the outer wall of the flow pool is provided with a set screw, which is used to fix the position of the adjusting seat after adjustment.

[0006] Preferably, a washer is provided between the lens and the clamping screw.

[0007] Preferably, the outer wall and inner hole of the adjusting seat are provided with sealing rings.

[0008] Preferably, the sealing ring is a perfluoroether O-ring.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1. This type of optical path adjustable flow cell, by threading the adjustment seat to the flow cell cavity, can realize the rotational fine adjustment of the optical path, so that the adjustment of different optical paths does not require disassembling the flow cell, and the optical path can be adjusted in real time, improving the convenience and efficiency of experimental operation.

[0011] 2. This type of optical path adjustable flow cell, through the structural design of direct mounting of the lens and the cavity, avoids the use of gaskets in traditional flow cells. It relies on high-precision processing to ensure good parallelism between the two lenses, effectively reducing optical errors, thereby improving detection accuracy and measurement stability.

[0012] 3. This type of flow cell with adjustable optical path uses a perfluoroether O-ring. Compared with the traditional PTFE sealing gasket, the perfluoroether O-ring not only has excellent resistance to acid and alkali corrosion and chemical solvents, but also has better sealing performance and higher pressure resistance. This ensures that the flow cell can maintain stable sealing performance under high temperature, high pressure and complex chemical environments, further improving the durability and reliability of the equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the internal structure of the flow cell of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of a flow cell in the prior art.

[0015] In the diagram: 1. Flow cell cavity; 2. Adjustment seat; 3. Lens; 4. Clamping screw; 5. Interface; 6. Set screw; 7. Washer; 8. Sealing ring; 9. Cavity; 91. Lens 2; 92. PTFE sealing washer; 93. Clamping element; 94. Slit. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integrated connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0020] Example

[0021] Please see Figure 1 As shown, the present invention provides a flow cell with adjustable optical path: a flow cell with adjustable optical path includes a flow cell cavity 1, two adjustment seats 2 are installed opposite each other inside the flow cell cavity 1, both adjustment seats 2 are threadedly connected to the flow cell cavity 1, a lens 3 is provided at the opposite end of the two adjustment seats 2, a clamping screw 4 is provided on the opposite side of the lens 3 facing the flow cell cavity 1, and an interface 5 is provided at the end of the adjustment seat 2.

[0022] In this embodiment, the interface 5 is used for optical path system connection. Its form is not limited and can be either a fiber optic interface or a non-fiber optic interface to adapt to the needs of different types of optical systems.

[0023] When the optical path needs to be adjusted, the operator can change the distance between the lenses 3 by rotating the fine-tuning adjustment seat 2 to achieve different optical path matching, thereby meeting different detection needs.

[0024] A set screw 6 is provided on the outer wall of the flow cell cavity 1 to fix the adjustment seat 2 after it is adjusted to the target position. The set screw 6 can effectively prevent the adjustment seat 2 from shifting during use, thereby ensuring the stability of the optical path and the measurement accuracy.

[0025] A washer 7 is provided between the lens 3 and the clamping screw 4 to buffer the pressure applied by the clamping screw 4 to the lens 3 and prevent the lens from being damaged due to uneven force during the fixing process.

[0026] The outer wall and inner hole of the adjustment seat 2 are equipped with sealing rings 8 to enhance the sealing performance of the flow cell, prevent liquid leakage, and ensure the stable operation of the optical system in different environments.

[0027] In this embodiment, the sealing ring 8 can be further designed as a perfluoroether O-ring. Compared with the traditional PTFE sealing gasket, the perfluoroether O-ring not only retains excellent resistance to acid and alkali corrosion and chemical solvents, but also has significant improvements in sealing effect and pressure resistance, and can better meet the needs of high-precision optical inspection.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An optical path adjustable flow cell, characterized by: The device includes a flow cell cavity (1), and two adjustment seats (2) are arranged opposite to each other inside the flow cell cavity (1). Both adjustment seats (2) are threadedly connected to the flow cell cavity (1). Each of the two adjustment seats (2) has a lens (3) at the opposite end. The lens (3) has a clamping screw (4) on the opposite side of the flow cell cavity (1). The end of the adjustment seat (2) has an interface (5).

2. The flow cell with adjustable optical path according to claim 1, characterized in that: The outer wall of the flow pool cavity (1) is provided with a set screw (6), which is used to fix the position of the adjustment seat (2) after adjustment.

3. The flow cell with adjustable optical path according to claim 1, characterized in that: A washer (7) is provided between the lens (3) and the clamping screw (4).

4. The flow cell with adjustable optical path according to claim 1, characterized in that: The outer wall and inner hole of the adjusting seat (2) are provided with sealing rings (8).

5. The flow cell with adjustable optical path according to claim 4, characterized in that: The sealing ring (8) is a perfluoroether O-ring.

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