An optical component assembly box and a turbidimeter

Abstract

This invention provides an optical component assembly box and a turbidity meter. The optical component assembly box includes a base and a top cover, forming an installation space between the base and the top cover. The top cover has a test tube insertion hole, and the base has a test tube testing position corresponding to the test tube insertion hole. The base has multiple light receiving device mounting seats and multiple lower slots. The light receiving device mounting seats have assembly grooves. The top cover has multiple upper slots corresponding to the lower slots. The upper slots and corresponding lower slots form a lens clamping structure. The side walls of the upper and lower slots have notches, which form light transmission holes. The base and the top cover are both integrally formed structures. This invention enables rapid positioning and installation of optical components, ensuring high assembly accuracy and reliability, and improving the accuracy and stability of turbidity detection.

Description

Technical Field

[0001] This utility model relates to the field of turbidimeter technology, and more specifically, to an optical element assembly box and a turbidimeter. Background Technology

[0002] In the field of water quality testing, benchtop turbidity meters are widely used in laboratories, waterworks, and other settings due to their ease of operation and high accuracy. The installation accuracy of their internal optical components (convex lenses, filters, neutral density filters, scattered light receivers, etc.) directly affects the accuracy of turbidity measurement, but the current sensor fixing methods of turbidity meters have some technical bottlenecks.

[0003] In existing technologies, optical components are mounted on metal base plates, making it difficult to guarantee installation accuracy. For example, the structure disclosed in patent document CN119354923A involves designing holes in the base plate and fixing mounting brackets to it with bolts, after which the optical components are mounted onto the brackets. However, the fit between the holes and bolts is prone to reference deviations, and the stress during bolt tightening can cause localized deformation of the base plate. Furthermore, the metal material is susceptible to thermal expansion and contraction or structural loosening due to temperature changes and vibrations. Combined with the accuracy transfer loss caused by the stacked installation of multiple brackets, the optical components are prone to positional shifts during long-term use, making it difficult to guarantee installation accuracy and consequently affecting the accuracy and stability of the detection results. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the technical problem to be solved by this utility model is how to improve the installation accuracy and reliability of optical components in a turbidimeter.

[0005] To achieve the above objectives, this utility model provides an optical component assembly box, including a base and a top cover, with an installation space formed between the base and the top cover. The top cover has a test tube insertion hole, and the base has a test tube testing position corresponding to the test tube insertion hole. The base has multiple light receiving device mounting seats and multiple lower slots, and the light receiving device mounting seats have assembly grooves. The top cover has multiple upper slots corresponding to the lower slots, and the upper slots and corresponding lower slots form a lens clamping structure. The side walls of the upper and lower slots are provided with notches, and the upper and lower notches form light-transmitting holes. The base and the top cover are both integrally formed structures.

[0006] This utility model forms a closed installation space through the base and top cover, and the integrated molding structure ensures the rigidity of the overall structure. The fixing structure of the optical element (light receiving device mounting base, upper slot, lower slot) is integrated on the base and top cover, which can realize the rapid positioning and installation of the optical element, and ensure high assembly accuracy and reliability, thereby improving the accuracy and stability of turbidity detection.

[0007] Furthermore, the number of optical receiver mounting bases is three: a reference optical receiver mounting base, a scattered optical receiver mounting base, and a transmitted optical receiver mounting base. These three mounting bases are arranged in separate zones to avoid signal crosstalk and meet the requirements for simultaneous acquisition of multi-angle optical signals in turbidity detection.

[0008] Furthermore, there are three lower slots: a lower slot for the filter, a lower slot for the convex lens, and a lower slot for the neutral density filter. Similarly, there are three upper slots: an upper slot for the filter, an upper slot for the convex lens, and an upper slot for the neutral density filter. These three sets of lens slots are independently designed to accommodate different lens thicknesses and functions. The upper and lower slot design allows for rapid lens positioning and installation, ensuring the lens's positional accuracy in the optical path. The light-transmitting aperture design ensures unobstructed light flow.

[0009] Furthermore, the shape of the mounting groove on each of the optical receiver mounting bases is adapted to the shape of the corresponding optical receiver, and the difference between the width of each upper and lower slot and the thickness of the corresponding lens is less than or equal to 0.1 mm. The mounting groove adapts to the shape of the optical receiver, achieving precise fixation of the optical receiver; controlling the gap between the slot and the lens avoids optical path offset caused by loose installation, ensuring the stability of the detection signal.

[0010] Furthermore, the reference light receiver mounting base is disposed on the side of the base near the light source, and the filter under-slot is disposed between the reference light receiver mounting base and the light source. Thus, the reference light receiver can acquire the reference light signal without sample attenuation in real time and correct light source fluctuations in real time.

[0011] Furthermore, the lower slot of the convex lens, the lower slot of the neutral density filter, the test tube test position, and the mounting base of the transmitted light receiving device are sequentially arranged in the direction of light incidence. The mounting base of the scattered light receiving device is located on one side of the test tube test position, at a 90° angle to the direction of light incidence. The optical element fixing structure is arranged according to the direction of light incidence, forming a dual-light path detection layout of scattering and transmission, which can adapt to the detection needs of different turbidity ranges.

[0012] Furthermore, the mounting base of the transmitted light receiving device is at a 135° angle to the incident direction of the light. The angle of the transmitted light receiving device corresponds to the mounting base, which can avoid interference from direct light from the light source, and at the same time, the angle misalignment reduces crosstalk of scattered light to the transmitted light signal.

[0013] Furthermore, the base is provided with multiple positioning plates, the height of which exceeds the side wall of the base, and the top cover is provided with a limiting structure that abuts against the positioning plates. This allows for rapid positioning of the base and top cover during assembly, ensuring alignment of the upper and lower slots and preventing optical path deviations caused by misalignment.

[0014] Furthermore, the base is provided with multiple lower screw posts, and the top cover is provided with multiple upper screw posts corresponding to the lower screw posts. The top cover and the base are fixedly connected by screws. Thus, the base and the top cover form a rigid structure that can resist component displacement under vibration, ensuring the positioning stability of the optical components during long-term use.

[0015] This utility model also provides a turbidimeter, including the aforementioned optical element assembly box. By employing this assembly box, the turbidimeter, through its ingenious structural design, can achieve accurate acquisition of light signals during turbidity detection, thereby improving the overall detection accuracy and environmental adaptability.

[0016] In summary, the present invention has the following advantages over the prior art: (1) This utility model integrates the optical receiving device mounting base, upper slot and lower slot on the base and top cover to ensure the installation and positioning accuracy of optical components and ensure the accuracy of turbidity measurement results from the assembly structure.

[0017] (2) The present invention adopts an integrally molded base and top cover structure, which reduces the risk of displacement after the optical components are installed, ensures that the optical path system remains stable in position during long-term use, avoids detection drift caused by displacement deformation, and provides continuous and reliable structural support for high-precision turbidity detection.

[0018] (3) The present invention adopts a standardized card slot and assembly groove design, which enables optical components to be quickly positioned and installed, and can be replaced without professional tools, thus improving the ease of assembly. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the optical component assembly box in the embodiment.

[0020] Figure 2 This is an exploded view of the optical component assembly box in the embodiment.

[0021] Figure 3 This is a cross-sectional view of the optical component assembly box in the embodiment.

[0022] Figure 4 This is a structural diagram of the base of the optical component assembly box in the embodiment.

[0023] Figure 5 This is a structural diagram of the top cover of the optical component assembly box in the embodiment.

[0024] Explanation of reference numerals in the attached figures: 1-Base, 11-Reference light receiver mounting base, 12-Scattered light receiver mounting base, 13-Transmitted light receiver mounting base, 14-Filter lower slot, 15-Convex lens lower slot, 16-Neutral neutral density filter lower slot, 17-Test tube test position, 18-Positioning plate, 19-Lower screw post, 2-Top cover, 21-Filter upper slot, 22-Convex lens upper slot, 23-Neutral neutral density filter upper slot, 24-Test tube insertion hole, 25-Upper screw post. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar symbols and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. 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 element 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.

[0029] Combination Figures 1 to 5 As shown, this embodiment discloses an optical component assembly box for a turbidimeter, which consists of a base 1 and a top cover 2. After the base 1 and the top cover 2 are fastened together, they form a closed installation space, providing a protective environment for the internal optical components.

[0030] The top cover 2 is provided with a test tube insertion hole 24, the diameter of which is adapted to the outer diameter of the test tube. The hole wall extends upward and has a certain height, so that the test tube can be stably positioned after insertion. The base 1 is provided with a test tube testing position 17. The test tube insertion hole 24 and the test tube testing position 17 are arranged coaxially to ensure that the central axis of the test tube intersects with the central axis of the optical path of the assembly box when it is inserted.

[0031] The optical components of the turbidimeter mainly include a light receiving device and optical lenses. The base 1 has multiple mounting seats for various light receiving devices. In this embodiment, there are three mounting seats: a reference light receiving device mounting seat 11, a scattered light receiving device mounting seat 12, and a transmitted light receiving device mounting seat 13, corresponding to the reference light receiving device, the scattered light receiving device, and the transmitted light receiving device, respectively. Each mounting seat has a mounting groove that matches the shape of the corresponding light receiving device. The shape of the mounting groove is precisely designed according to the external contour of the light receiving device. For example, for a cylindrical light receiving device, the mounting groove is designed as a circular groove with a diameter matching the outer diameter of the light receiving device, forming an interference fit or a clearance fit to ensure that the light receiving device will not shift after installation. This adaptability design enables precise positioning of the light receiving device, avoiding optical axis misalignment due to loose installation, which would affect the stability of the detection signal. In some other embodiments, the number and shape of the mounting seats can be adjusted according to the required light receiving device.

[0032] The base 1 has multiple lower slots, and correspondingly, the top cover 2 has multiple upper slots corresponding to the lower slots. The upper slots and their corresponding lower slots form a lens clamping structure. Both the upper and lower slots have notches on their side walls, forming light-transmitting holes to ensure unobstructed light paths. In this embodiment, there are three sets of lower and upper slots: a filter lower slot 14 and a filter upper slot 21, a convex lens lower slot 15 and a convex lens upper slot 22, and a neutral density filter lower slot 16 and a neutral density filter upper slot 23. This upper and lower slot design allows for rapid lens positioning and installation, ensuring the lens's positional accuracy in the light path. During lens installation, the filter, convex lens, and neutral density filter are first placed in the lower slots of the base 1, and then the top cover 2 is fastened onto the base 1, aligning the upper and lower slots to stably clamp the lens between them.

[0033] In a preferred embodiment, the difference between the slot width and the corresponding lens thickness is controlled within a small range, for example, less than or equal to 0.1 mm. This precise fit can prevent the lens from becoming loose in the slot and ensure the positional accuracy of the lens in the optical path.

[0034] In the above embodiments, both the base 1 and the top cover 2 are integrally molded structures, preferably made of engineering plastic. This ensures the dimensional accuracy of the base 1 and the top cover 2, avoids assembly errors caused by separate processing of the optical component fixing structure, and reduces the risk of displacement after the optical component is installed, ensuring the optical path system maintains positional stability during long-term use. Furthermore, the standardized slot and mounting groove design makes the installation and replacement of optical components simple and quick, requiring no special tools, greatly improving assembly convenience and reducing equipment maintenance costs.

[0035] In this embodiment, the specific layout structure of the optical receiver mounting base and the lower slot is as follows: Figure 3 and Figure 4 As shown, the reference light receiver mounting base 11 is located on the side of the base 1 near the light source, and the filter slot 14 is located between the light receiver mounting base and the light source. This arrangement allows the reference light receiver to acquire the reference light signal without sample attenuation in real time. The filter is used to filter the light emitted by the light source, ensuring the stability and accuracy of the reference light signal. By acquiring the reference light signal in real time, fluctuations in the light source can be corrected in real time, thereby improving the accuracy of turbidity detection.

[0036] In the direction of light incidence (see Figure 3 (Dash line in the middle) are arranged in sequence as follows: a convex lens lower slot 15, a neutral density filter lower slot 16, a test tube test position 17, and a transmitted light receiving device mounting base 13; a scattered light receiving device mounting base 12 is located on one side of the test tube test position 17, at a 90° angle to the incident light direction. This arrangement allows the light emitted from the light source to pass through the convex lens for focusing, the neutral density filter for intensity adjustment, and then into the sample in the test tube. The light that penetrates the sample is then received by the transmitted light receiving device; simultaneously, the scattered light receiving device is used to receive the light scattered by suspended particles in the sample.

[0037] In a preferred embodiment, the light receiving direction of the transmitted light receiving device mounting base 13 is 135° to the incident light direction. This angle design enables the transmitted light receiving device to avoid interference from direct light from the light source, while reducing crosstalk of scattered light to the transmitted light signal by the angle misalignment, thereby improving the resolution of the transmitted light signal.

[0038] In this embodiment, to achieve precise positioning of the base 1 and the top cover 2, multiple positioning plates 18 are provided on the base 1. These positioning plates 18 are perpendicular to the surface of the base 1, and their height exceeds the side wall of the base 1. A corresponding limiting structure, such as a limiting groove or a limiting boss, is provided on the top cover 2 to abut against the positioning plates 18. When the base 1 and the top cover 2 are assembled, the positioning plates 18 abut against the limiting structure, thereby achieving rapid alignment between the two, ensuring the positional correspondence of the upper and lower slots, and preventing optical path deviation due to installation misalignment.

[0039] The base 1 and the top cover 2 are fixedly connected by screw posts. The base 1 is provided with a lower screw post 19, and the top cover 2 is provided with a corresponding upper screw post 25. In this embodiment, the number of screw posts is at least six sets, distributed on the edges of the base 1 and the top cover 2, which can ensure that the fixing force between the base 1 and the top cover 2 is evenly distributed, forming a rigid structure and ensuring the positioning stability of the optical element during long-term use.

[0040] Applying the optical component assembly box provided in the above embodiments to a turbidity meter can achieve precise and stable assembly of optical components through its structural design, ensuring accurate acquisition of light signals during turbidity detection and improving the overall detection accuracy and environmental adaptability.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An optical element assembly case characterized by comprising: The device includes a base (1) and a top cover (2), with an installation space between the base (1) and the top cover (2). The top cover (2) has a test tube insertion hole (24), and the base (1) has a test tube testing position (17) corresponding to the test tube insertion hole (24). The base (1) has multiple light receiving device mounting seats and multiple lower slots. The light receiving device mounting seats have assembly grooves. The top cover (2) has multiple upper slots corresponding to the lower slots. The upper slots and the corresponding lower slots form a lens clamping structure. The side walls of the upper slots and the lower slots are provided with notches, and the upper and lower notches form a light-transmitting hole. The base (1) and the top cover (2) are both integrally formed structures.

2. The optical component assembly box according to claim 1, characterized in that, The number of optical receiver mounting bases is three, namely, reference optical receiver mounting base (11), scattered optical receiver mounting base (12), and transmitted optical receiver mounting base (13).

3. The optical element assembly case according to claim 2, characterized by The number of lower slots is three, namely the lower slot of the filter (14), the lower slot of the convex lens (15), and the lower slot of the neutral density filter (16). The number of upper slots is three, namely the upper slot of the filter (21), the upper slot of the convex lens (22), and the upper slot of the neutral density filter (23).

4. The optical element assembly case according to claim 3, wherein The shape of the mounting groove on each of the optical receiving devices is adapted to the shape of the corresponding optical receiving device, and the difference between the width of each upper slot and the width of the lower slot and the thickness of the corresponding lens is less than or equal to 0.1 mm.

5. The optical element assembly case according to claim 3, wherein The reference light receiver mounting base (11) is located on the side of the base (1) near the light source, and the filter lower slot (14) is located between the reference light receiver mounting base (11) and the light source.

6. The optical element assembly case according to claim 3, wherein The lower slot (15) of the convex lens, the lower slot (16) of the light-reducing filter, the test tube test position (17) and the transmission light receiving device mounting base (13) are arranged sequentially in the direction of light incidence. The scattering light receiving device mounting base (12) is arranged on one side of the test tube test position (17) at a 90° angle to the direction of light incidence.

7. The optical element assembly case according to claim 6, wherein The mounting base (13) of the transmitted light receiving device is at 135° to the incident direction of the light.

8. The optical element assembly case according to any one of claims 1 to 7, wherein The base (1) is provided with multiple positioning plates (18), the height of the positioning plates (18) exceeds the side wall of the base (1), and the top cover (2) is provided with a limiting structure that abuts against the positioning plates (18).

9. The optical element assembly case according to any one of claims 1 to 7, wherein The base (1) is provided with a plurality of lower screw posts (19), and the top cover (2) is provided with a plurality of upper screw posts (25) corresponding to the lower screw posts (19). The top cover (2) and the base (1) are fixedly connected by screws.

10. A turbidimeter characterized by comprising: Includes the optical element assembly box as described in any one of claims 1-9.

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