Light shield and water body detector

Abstract

The utility model provides a light shield and water body detector, light shield includes casing, through -flow hole array, including a plurality of through -flow holes on the casing, along water body detector length direction arrangement, light -shielding portion, including setting first light -shielding board of through -flow hole array first side and setting second light -shielding board in second side opposite with first side, two light -shielding board end face in length direction with the end face of casing flush, first light -shielding board includes the first extension from the casing to the direction of deviating from the casing, and the end of first extension has the curved portion of deviating to second side, second light -shielding board includes the second extension from the casing deviating from the casing direction and length greater than first extension, third extension from second extension end to first side and surpass the third extension arm root part, fourth extension from the third extension end to the direction of casing, in with the normal of fourth extension vertical projection, fourth extension and curved portion partially overlap.

Description

Technical Field

[0001] This utility model relates to the field of water body detection technology, and in particular to a light shield and a water body detector. Background Technology

[0002] In the field of water body detection technology, fluorescence spectroscopy is often used to directly detect the concentration of pollutants in water bodies on-site. By utilizing the characteristic that different substances produce different wavelengths and radiation intensities under light conditions, the content of various substances in water bodies can be quickly detected, which is highly efficient and practical.

[0003] In related technologies, to eliminate the interference of ambient light on the detection, a light shield is set in the water body detector designed based on fluorescence spectroscopy. The light shield is used to minimize the influence of ambient light on the detection results. However, since the light shield needs a flow hole to allow water in the water body to enter the detection chamber of the water body detector, ambient light will inevitably enter the detection chamber through the flow hole. Therefore, it is still impossible to eliminate the interference of ambient light on the detection results. Utility Model Content

[0004] This invention provides a light shield to solve the defect in the prior art where ambient light enters the detection cavity of the water body detector due to the flow holes of the light shield, thus affecting the detection structure. By constructing a first light shield and a second light shield on both sides of the flow hole array to block ambient light, the accuracy of the water body detector's detection results is ensured. This utility model provides a light shield, comprising: a housing; a flow hole array including a plurality of flow holes opened on the housing and arranged along the length direction of the water body detector; a light shielding portion including a first light shielding plate disposed on a first side of the flow hole array and a second light shielding plate disposed on a second side opposite to the first side, wherein the end faces of the two light shielding plates in the length direction are flush with the end face of the housing; the first light shielding plate includes a first extension extending from the housing in a direction away from the housing, the end of the first extension having a curved portion biased towards the second side; the second light shielding plate includes a second extension extending from the housing in a direction away from the housing and having a length greater than the first extension; a third extension extending from the end of the second extension toward the first side and beyond the root of the first extension arm; and a fourth extension extending from the end of the third extension toward the housing; wherein, in a projection perpendicular to the normal of the fourth extension, the fourth extension and the curved portion at least partially overlap.

[0005] According to the present invention, a light shield is provided in which the third extension is arranged substantially parallel to the side wall of the housing.

[0006] According to the present invention, the angle between the curved portion and the first extension portion is greater than or equal to 90 degrees.

[0007] According to the present invention, in a light shield, the fourth extension is substantially parallel to the curved portion.

[0008] According to the present invention, the projection of the housing in the direction perpendicular to the length is an arc shape, and the flow hole array includes a first flow hole array and a second flow hole array, which are symmetrically arranged on both sides of the housing.

[0009] According to the present invention, a light shield is provided, wherein the array of flow holes includes a plurality of inclined flow holes that are inclined relative to the thickness direction of the housing, wherein the outer opening of the inclined flow hole on the outer wall of the housing is lower than the inner opening on the inner wall of the housing.

[0010] According to the present invention, the inclined flow hole is a strip-shaped hole, and the long axis of the inclined flow hole is parallel to the width direction of the shell.

[0011] According to the present invention, the light shield array further includes at least one semi-circular flow hole disposed at the lower edge of the housing.

[0012] According to the present invention, a light shield is provided with a plurality of strip-shaped grooves on the upper edge of the shell.

[0013] This utility model also provides a water body detector, comprising: a housing; and a light shield as described in any of the above claims, wherein the inner wall of the housing and the light shield together form a detection cavity.

[0014] The light shield and water body detector provided by this utility model, through the relative staggered arrangement of the first light shield and the second light shield, blocks ambient light from directly entering the detection cavity through the flow hole array on the inner side. Furthermore, through the cooperation of the fourth extension and the curved part, the ambient light must go through multiple reversals before it can enter the detection cavity. This process greatly attenuates the incident ambient light, thereby greatly reducing the brightness of the ambient light in the detection cavity. Meanwhile, water in the environment can freely enter the detection cavity, thus ensuring the accuracy of the detection results.

[0015] As can be seen from the above, the light shield and water body detector provided by this utility model have at least the following beneficial effects: (1) By staggering the first and second light-shielding plates, ambient light can be effectively prevented from entering the detection chamber, thus ensuring the accuracy of the water body detection results based on fluorescence spectroscopy. (2) Because a semi-circular flow hole and an inclined flow hole are provided on the shell, water in the detection area can quickly enter the detection chamber during the process of lowering the water body detector into the water body; (3) A strip-shaped vent hole is provided on the upper edge of the shell to prevent water from entering too quickly or water flow from causing fine air bubbles to accumulate at the top of the detection chamber, thus ensuring the stability of the detection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a light shield according to an exemplary embodiment of the present invention; Figure 2 This is a top view of a light shield according to an illustrative embodiment of the present utility model; Figure 3 This is a side view of a light shield according to an illustrative embodiment of the present invention; Figure 4 This is a cross-sectional view along section AA according to an illustrative embodiment of the present invention; Figure 5 This is a schematic diagram of a water quality detector according to an illustrative embodiment of the present invention. Figure label: 1-Sunshade; 10-Shell; 11-groove; 20 - First sunshade; 21-First extension; 22-Bend; 30 - Second sunshade; 31-Second extension; 32-Third extension; 33-Fourth extension; 41- Inclined flow hole; 42- Semicircular flow hole; 43-Flat DC through hole; 431 - Screw hole; 5-Outer shell. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions 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, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Figure 1 This is a schematic diagram of a light shield according to an exemplary embodiment of the present invention; Figure 2 This is a top view of a light shield according to an illustrative embodiment of the present invention.

[0020] like Figure 1 and Figure 2 As shown, the light shield installed on the water quality detector includes a housing 10, a flow hole array, and a light-shielding part. The flow hole array includes multiple flow holes opened on the housing 10, arranged along the length direction of the water quality detector. The light-shielding part includes a first light-shielding plate 20 disposed on a first side of the flow hole array and a second light-shielding plate 30 disposed on a second side opposite to the first side, wherein the end faces of the two light-shielding plates in the length direction are flush with the end faces of the housing. The first light-shielding plate 20 includes a first extension 21 extending from the housing 10 in a direction away from the housing, and the end of the first extension 21 has a curved portion 22 biased towards the second side. The second light-shielding plate includes a second extension 31 extending from the housing 10 in a direction away from the housing and having a length greater than the first extension; a third extension 32 extending from the end of the second extension 31 toward the first side and exceeding the root of the first extension arm 21; and a fourth extension 33 extending from the end of the third extension 32 toward the housing 10. In a projection perpendicular to the normal of the fourth extension 33, the fourth extension 33 at least partially overlaps with the curved portion 22.

[0021] According to an embodiment of this utility model, the housing 10 can be a planar structure, which is relatively simple to process. The water body detector with the housing can be directly lowered into the water body. The water in the water body enters the water body detector through the direct flow hole array to complete the detection of the water body.

[0022] According to an embodiment of the present invention, the housing 10 can also be constructed as a three-panel structure, including a front and two opposite sides, each side having an array of flow holes. When performing water body detection, especially for water bodies with relatively fixed flow, such as in rivers or streams, the side with the array of flow holes can be oriented towards the direction of water flow, thereby enabling water body detection while ensuring water flow as much as possible.

[0023] According to an embodiment of the present invention, the light-shielding part can be made of materials such as aluminum alloy or stainless steel, and the surface of the light-shielding part can be black anodized or sprayed to increase the light-shielding effect.

[0024] According to another embodiment of the present invention, the light-shielding part may also be made of black plastic or composite material.

[0025] With the light shield provided by this utility model, due to the staggered arrangement of the first light shield 20 and the second light shield 30, and the fact that the ends of the fourth extension 33 and the curved part 22 can overlap in projection perpendicular to the normal of the fourth extension 33, a space that is basically sealed off from ambient light is formed inside the flow hole. Most of the ambient light is directly reflected or absorbed by the first light shield 20 and the second light shield 30. Only a small portion of the incident light can enter the space between the fourth extension 33 and the curved part 22, and it must be repeatedly reflected by the fourth extension 33 and the curved part 22 before it can pass through the light shield and enter the detection cavity formed between the light shield and the water body detector housing. This arrangement can greatly reduce the influence of ambient light on the detection results.

[0026] In one illustrative embodiment, the third extension 32 is disposed substantially parallel to the sidewall of the housing 10.

[0027] In one illustrative embodiment, the angle between the curved portion 22 and the first extension 21 is greater than or equal to 90 degrees.

[0028] With the above-described arrangement, the curved portion 22 can extend inward as much as possible to reduce the possibility of incident ambient light entering the space between the curved portion 22 and the fourth extension portion 33 and passing through the light-shielding portion.

[0029] In one illustrative embodiment, the fourth extension 33 is generally parallel to the bend 22.

[0030] According to an embodiment of the present invention, the extension range of the fourth extension 33 can exceed the connection between the curved portion 22 and the first extension 21, so as to extend the path of ambient light in the space between the fourth extension 33 and the curved portion 22 as much as possible, thereby attenuating the ambient light as much as possible.

[0031] In one illustrative embodiment, the projection of the housing 10 perpendicular to the length direction is an arc shape, and the flow hole array includes a first flow hole array and a second flow hole array, which are symmetrically arranged on both sides of the housing 10.

[0032] With the above-described configuration, the arc-shaped housing 10 can deflect / reflect light when it enters the light shield. Combined with the light shields on both sides, it can effectively extend the light entry path. In addition, the arc-shaped structure also increases the contact area with the water. Through the symmetrical array of the first and second flow holes, the water can flow evenly into and out of the water detector, ensuring the accuracy of the water detection results in the flowing state.

[0033] Figure 3 This is a side view of a light shield according to an illustrative embodiment of the present invention; Figure 4 This is a cross-sectional view along section AA according to an illustrative embodiment of the present invention.

[0034] like Figure 1 , Figure 3 and Figure 4 As shown, the flow hole array includes a plurality of inclined flow holes 41 that are inclined relative to the thickness direction of the housing 10, wherein the outer opening of the inclined flow hole 41 on the outer wall of the housing 10 is lower than the inner opening on the inner wall of the housing 10.

[0035] With the above-described configuration, during the lowering of the water body detector, the outer opening is lower than the inner opening, allowing water to quickly enter the detector. Furthermore, compared to setting the flow hole parallel to the thickness direction of the casing 10, the disturbance of the water flow entering the water body detector through the inclined flow hole 41 is relatively small, which also helps to stabilize the detection results.

[0036] In one illustrative embodiment, the inclined flow hole 41 is a strip-shaped hole, and the long axis of the inclined flow hole 41 is parallel to the width direction of the housing 10.

[0037] With the above-described configuration, since the inclined flow hole 41 is a strip-shaped hole, the flow rate of water entering the water detector can be increased as much as possible, which helps to complete the detection process quickly.

[0038] In one illustrative embodiment, the flow-through array further includes at least one semi-circular flow-through hole 42 disposed at the lower edge of the housing 10.

[0039] According to an embodiment of the present invention, the arc-shaped opening of the semi-circular flow hole 42 can face the lower edge to increase the flow rate of water flowing into the water detector.

[0040] In one illustrative embodiment, when the flow hole array is located in the edge region near the width direction of the housing 10, the flow hole array also includes a plurality of flat DC through holes 43, and screw holes 431 are provided on the side wall of the flat DC through holes 43 near the housing 10, so that the light shield is fixed to the water body detector by screws.

[0041] When the water body detector is released too quickly or the water flow in the water body is too fast, some air bubbles may be generated in the detection chamber. These air bubbles accumulate in the detection chamber, which will cause some refraction of the excitation light emitted by the water body detector, thus interfering with the detection results. On the other hand, the accumulation of these air bubbles will also affect the pressure balance inside and outside the water body detector, hindering the flow of water samples.

[0042] Therefore, in one illustrative embodiment, the upper edge of the housing 10 is provided with a plurality of strip-shaped grooves 11, thereby removing the air bubbles accumulated in the water detector.

[0043] According to an embodiment of the present invention, the groove 11 can be set within the area blocked by the light-shielding part to prevent ambient light from entering the detection cavity through the groove 11.

[0044] Figure 5 This is a schematic diagram of a water body detector according to an illustrative embodiment of the present invention.

[0045] like Figure 5 As shown, an embodiment of the present invention also provides a water body detector, including a housing 5 and a light shield 1 as described in any of the above embodiments, wherein the inner wall of the housing 5 and the light shield 1 surround and form a detection cavity.

[0046] It should be noted that the terms "upper", "lower", "higher" and "lower" mentioned in the embodiments of this utility model are based on the relative positions of the water body detector in the working state of detecting water.

[0047] 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 this 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A light shield, installed on a water quality detector, characterized in that, include: case; The flow hole array includes multiple flow holes formed on the housing and arranged along the length of the water body detector; The light-shielding part includes a first light-shielding plate disposed on a first side of the flow hole array and a second light-shielding plate disposed on a second side opposite to the first side, wherein the end faces of the two light-shielding plates in the length direction are flush with the end face of the housing. The first light-shielding plate includes a first extension extending from the housing in a direction away from the housing, and the end of the first extension has a curved portion biased towards the second side; The second light shield includes a second extension that extends from the housing away from the housing and has a length greater than the first extension; a third extension that extends from the end of the second extension toward the first side and beyond the root of the first extension arm; and a fourth extension that extends from the end of the third extension toward the housing. In a projection perpendicular to the normal of the fourth extension, the fourth extension at least partially overlaps with the curved portion.

2. The light shield according to claim 1, characterized in that, The third extension is arranged substantially parallel to the side wall of the housing.

3. The light shield according to claim 1, characterized in that, The angle between the curved portion and the first extension portion is greater than or equal to 90 degrees.

4. The light shield according to claim 3, characterized in that, The fourth extension is substantially parallel to the curved portion.

5. The light shield according to claim 1, characterized in that, The projection of the housing onto the direction perpendicular to its length is an arc shape, and the flow hole array includes a first flow hole array and a second flow hole array, which are symmetrically arranged on both sides of the housing.

6. The light shield according to claim 1 or 5, characterized in that, The flow hole array includes a plurality of inclined flow holes that are inclined relative to the thickness direction of the housing, wherein the outer opening of the inclined flow hole on the outer wall of the housing is lower than the inner opening on the inner wall of the housing.

7. The light shield according to claim 6, characterized in that, The inclined flow hole is a strip-shaped hole, and the long axis of the inclined flow hole is parallel to the width direction of the housing.

8. The light shield according to claim 6, characterized in that, The flow hole array also includes at least one semi-circular flow hole disposed at the lower edge of the housing.

9. The light shield according to claim 1, characterized in that, The upper edge of the shell has multiple strip-shaped grooves.

10. A water quality detector, characterized in that, include: shell; as well as The light shield as described in any one of claims 1-9; The inner wall of the outer shell and the light shield together form a detection cavity.

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