Filter screen and water environment monitoring device

Abstract

The application relates to a filter screen and a water environment monitoring device and relates to the technical field of monitoring. The filter screen comprises an inner filter element and an outer filter element; the outer filter element is arranged outside the inner filter element, and the outer filter element is fixed relative to the inner filter element; the inner filter element is internally provided with a containing cavity; a first flow-through channel is arranged between the outer filter element and the inner filter element, the first flow-through channel comprises a first flow-through opening in communication with the outside of the outer filter element, the bottom of the outer filter element is provided with a third flow-through channel in communication with the containing cavity, the inner filter element is provided with a second flow-through channel in communication with the containing cavity, the second flow-through channel comprises a plurality of second flow-through openings, the first flow-through channel, the second flow-through channel and the third flow-through channel are communicated to enable the containing cavity of the inner filter element to be in communication with the outside of the outer filter element, and the first flow-through opening and the second flow-through opening are arranged in a staggered mode. The filter screen of the application solves the technical problem that the filter screen in the prior art can enable ambient light to enter a monitoring light path and affect the measurement precision.

Description

Technical Field

[0001] This application relates to the field of monitoring technology, and more specifically, to a filter screen and a water environment monitoring device. Background Technology

[0002] Spectroscopic analysis is widely used in water quality testing due to its advantages such as speed, non-destructive nature, and online monitoring capabilities. For example, it is used to measure parameters such as COD, BOD, turbidity, and dissolved organic matter. Its basic principle is to establish a quantitative or qualitative relationship between spectral data and water quality parameters by detecting the absorption, scattering, or fluorescence characteristics of water at specific wavelengths, thereby achieving water quality monitoring.

[0003] In existing technologies, water environment monitoring equipment includes a filter screen and a monitoring probe, with the probe located inside the filter screen. The filter screen has pores that allow water exchange between the filter screen and the outside environment. In practical applications, the pores on the filter screen allow ambient light to enter the filter screen, affecting the monitoring optical path and leading to measurement errors. Utility Model Content

[0004] The purpose of this application is to provide a filter and a water environment monitoring device to alleviate the technical problem in the prior art where the filter allows ambient light to enter the monitoring optical path, affecting the measurement accuracy.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: Firstly, the filter screen provided by this utility model includes an inner filter element and an outer filter element; The outer filter element is sleeved on the outside of the inner filter element, and the outer filter element and the inner filter element are fixed relative to each other. The inner filter element has a receiving cavity inside. A first flow channel is provided between the outer filter element and the inner filter element. The first flow channel includes a first flow port communicating with the outside of the outer filter element. The bottom of the outer filter element is provided with a third flow channel communicating with the receiving cavity. The inner filter element is provided with a second flow channel communicating with the receiving cavity. The second flow channel includes multiple second flow ports. The first flow channel, the second flow channel, and the third flow channel are connected to enable the receiving cavity of the inner filter element to communicate with the outside of the outer filter element. The first flow port and the second flow port are staggered. Optionally, the sidewall of the external filter element is provided with the first flow port, and / or the bottom of the external filter element is provided with the first flow port; The bottom of the inner filter element is provided with the second flow port, or the side wall and bottom of the inner filter element are both provided with the second flow port.

[0006] Optionally, the outer filter element is a cover with an opening at the top, the opening communicating with the receiving cavity, and the inner sidewall of the outer filter element has an outwardly recessed first hollow portion, forming at least a portion of the first flow channel between the first hollow portion and the outer wall of the inner filter element; or, The filter screen is a one-piece cylindrical shape. The side wall of the filter screen is provided with a first hollow portion extending along its height direction. The side wall of the filter screen includes an outer side wall and an inner side wall. The first hollow portion is provided between the outer side wall and the inner side wall. The first hollow portion forms at least part of the first flow channel. The inner side wall forms the side wall of the inner filter element, and the outer side wall forms the side wall of the outer filter element.

[0007] Optionally, the first flow port is provided on the bottom of the outer filter element corresponding to the bottom end of the first hollow portion, or the first flow port is provided on the side wall of the outer filter element; the second flow port is provided on the side wall of the inner filter element, wherein: The bottom of the outer filter element is closed, and the bottom of the outer filter element is provided with the third flow channel in the portion corresponding to the bottom of the inner filter element. The receiving cavity inside the inner filter element has a closed bottom, and the bottom of the inner filter element is provided with a second flow port communicating with the third flow channel. Alternatively, the bottom of the outer filter element is closed, and the bottom of the outer filter element is provided with the third flow channel in the portion corresponding to the bottom of the inner filter element. The bottom of the receiving cavity provided inside the inner filter element is open, and the opening of the receiving cavity forms the second flow port that communicates with the third flow channel. Alternatively, the bottom of the outer filter element is open to form the third flow channel and the first flow port at the bottom, the inner filter element has a closed accommodating cavity inside, and the bottom of the inner filter element has a second flow port communicating with the third flow channel.

[0008] Optionally, the first flow port is disposed at the bottom of the outer filter element corresponding to the bottom end of the first hollow portion and on the side wall of the outer filter element, and the second flow port is disposed on the side wall of the inner filter element, wherein: The bottom of the outer filter element is closed, and the bottom of the outer filter element is provided with the third flow channel in the portion corresponding to the bottom of the inner filter element. The receiving cavity inside the inner filter element has a closed bottom, and the bottom of the inner filter element is provided with a second flow port communicating with the third flow channel. Alternatively, the bottom of the outer filter element is closed, and the bottom of the outer filter element is provided with the third flow channel in the portion corresponding to the bottom of the inner filter element. The bottom of the receiving cavity provided inside the inner filter element is open, and the opening of the receiving cavity forms the second flow port that communicates with the third flow channel. Alternatively, the bottom of the outer filter element is open to form the third flow channel and the first flow port, the inner filter element has a closed bottom in the receiving cavity, and the bottom of the inner filter element has a second flow port communicating with the third flow channel.

[0009] Optionally, a second hollow portion communicating with the first hollow portion is provided between the bottom of the inner filter element and the bottom of the outer filter element; the first flow port is provided on the side wall of the outer filter element; the bottom of the inner filter element is provided with the second flow port, and the second flow port communicates with the second hollow portion, wherein: The bottom of the outer filter element is closed, and the bottom of the outer filter element is provided with the third flow channel in the portion corresponding to the bottom of the inner filter element. The receiving cavity inside the inner filter element has a closed bottom, and the bottom of the inner filter element is provided with a second flow port communicating with the third flow channel. Alternatively, the bottom of the outer filter element is closed, and the bottom of the outer filter element is provided with the third flow channel in the portion corresponding to the bottom of the inner filter element. The bottom of the receiving cavity provided inside the inner filter element is open, and the opening of the receiving cavity forms the second flow port that communicates with the third flow channel.

[0010] Optionally, the second hollow portion is provided with a guide surface that slopes from the bottom of the first hollow portion toward the bottom of the outer filter element.

[0011] Optionally, the filter screen further includes a base plate, which is connected to the bottom of the external filter element, and a gap is provided between the base plate and the bottom of the external filter element.

[0012] Optionally, the base plate includes a connecting part and a light-shielding part, one end of the connecting part is connected to the external filter element, and the other end is connected to the light-shielding part; The thickness of the light-shielding portion gradually decreases from the end near the connecting portion to the end away from the connecting portion; or... The base plate includes multiple connectors and light-shielding parts. One end of each connector is connected to the outer filter element, and the other end is connected to the light-shielding part. The multiple connectors are arranged at intervals along the circumference of the filter screen.

[0013] Secondly, the water environment monitoring equipment provided by this utility model includes a filter screen and a monitoring device as described in any of the above claims, wherein the monitoring device is detachably connected to the filter screen, and the monitoring end of the monitoring device is located in the receiving cavity of the inner filter element.

[0014] Based on the above technical solutions, the technical effects achievable by this utility model can be analyzed as follows: The filter screen provided by this utility model includes an inner filter element and an outer filter element; the outer filter element is sleeved on the outside of the inner filter element, and the outer filter element and the inner filter element are relatively fixed to form a double-layer filter screen; the inner filter element has a receiving cavity inside, which is used to form a monitoring area to detect the water quality inside the receiving cavity. A first flow channel is provided between the outer filter element and the inner filter element. The first flow channel includes a first flow port that communicates with the outside of the outer filter element, allowing water to flow into the first flow channel. A third flow channel is provided at the bottom of the outer filter element that communicates with the receiving cavity, allowing water to flow out of the receiving cavity. A second flow channel is provided on the inner filter element that communicates with the receiving cavity. The second flow channel includes multiple second flow ports that allow water to flow into or out of the receiving cavity. The first, second, and third flow channels connect the receiving cavity of the inner filter element with the outside of the outer filter element, realizing the filtration function of the filter screen. The first and second flow ports are staggered. Based on the filtration function, the staggered first and second flow ports can prevent ambient light from directly entering the receiving cavity, thus blocking ambient light and preventing it from affecting the monitoring optical path, thereby improving measurement accuracy. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A three-dimensional structural schematic diagram of a fifth embodiment of the filter provided in this application; Figure 2 A top view of a fifth embodiment of the filter provided in this application; Figure 3 A schematic diagram of the internal structure of a fifth embodiment of the filter provided in this application; Figure 4 A three-dimensional structural schematic diagram of a sixth embodiment of the filter provided in this application; Figure 5 A top view of a sixth embodiment of the filter provided in this application; Figure 6 A schematic diagram of the internal structure of a sixth embodiment of the filter provided in this application; Figure 7 A three-dimensional structural schematic diagram of the tenth embodiment of the filter screen provided in this application (base plate including connecting part); Figure 8A front view of a tenth embodiment of the filter provided in this application (base plate including connecting portion); Figure 9 A top view of a tenth embodiment of the filter provided in this application (base plate including connecting portion); Figure 10 for Figure 9 Sectional view at point AA; Figure 11 A three-dimensional structural schematic diagram of the tenth embodiment of the filter screen provided in this application (base plate including connectors); Figure 12 A front view of a tenth embodiment of the filter provided in this application (base plate including connectors); Figure 13 A top view of a tenth embodiment of the filter provided in this application (base plate including connectors); Figure 14 for Figure 13 Sectional view at point BB.

[0017] icon: 100 - Internal filter element; 110 - Receiving cavity; 200 - External filter element; 210 - Snap-fit ​​protrusion; 220 - Positioning hole; 300 - Base plate; 310 - Connecting part; 320 - Light-shielding part; 330 - Connecting piece; 400 - First distribution channel; 410 - First distribution outlet; 510 - Second Circulation Port; 600-Guide surface. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0022] In existing technologies, water environment monitoring equipment includes a filter screen and a monitoring probe, with the probe located inside the filter screen. The filter screen has pores that allow water exchange between the filter screen and the outside environment. In practical applications, the pores on the filter screen allow ambient light to enter the filter screen directly, affecting the monitoring optical path and leading to measurement errors.

[0023] In view of this, the filter screen provided in this embodiment of the present invention includes an inner filter element 100 and an outer filter element 200; the outer filter element 200 is sleeved on the outside of the inner filter element 100, and the outer filter element 200 and the inner filter element 100 are relatively fixed; the inner filter element 100 has a receiving cavity 110 inside; a first flow channel 400 is provided between the outer filter element 200 and the inner filter element 100, the first flow channel 400 includes a first flow port 410 communicating with the outside of the outer filter element 200, the bottom of the outer filter element 200 is provided with a third flow channel communicating with the receiving cavity 110, the inner filter element 100 is provided with a second flow channel communicating with the receiving cavity 110, the second flow channel includes a plurality of second flow ports 510, the first flow channel 400, the second flow channel and the third flow channel are connected to make the receiving cavity 110 of the inner filter element 100 communicate with the outside of the outer filter element 200, and the first flow port 410 and the second flow port 510 are staggered.

[0024] An outer filter element 200 is fitted over the inner filter element 100, and the outer filter element 200 and the inner filter element 100 are fixed relative to each other to form a double-layer filter screen. The inner filter element 100 has a receiving cavity 110 inside, which is used to accommodate the monitoring end of a monitoring device, allowing the monitoring device to detect the water quality inside the receiving cavity 110. A first flow channel 400 is provided between the outer filter element 200 and the inner filter element 100. The first flow channel 400 includes a first flow port 410 communicating with the outside of the outer filter element 200, allowing water to flow into the first flow channel 400. A third flow channel communicating with the receiving cavity 110 is provided at the bottom of the outer filter element 200, allowing water to flow out of the receiving cavity 110. A second flow channel communicating with the receiving cavity 110 is provided on the inner filter element 100. The second flow channel includes multiple second flow ports 510, allowing water to flow out of the receiving cavity 110. The filter flows into or out of the receiving cavity 110; the first flow channel 400, the second flow channel, and the third flow channel connect the receiving cavity 110 of the inner filter element 100 with the outside of the outer filter element 200 to realize the filtering function of the filter screen; the first flow port 410 and the second flow port 510 are staggered. Under the filtering function, the staggered first flow port 410 and the second flow port 510 can prevent ambient light from directly shining into the receiving cavity 110, and have a certain blocking effect on ambient light, so as to prevent ambient light from directly shining into the receiving cavity 110 and affecting the monitoring optical path, thereby improving the measurement accuracy.

[0025] It should be noted that the inlet water velocity of the filter needs to be greater than the outlet water velocity so that the water in the receiving cavity 110 can maintain a certain depth during monitoring. Therefore, the size of the third flow channel and the second flow port can be set according to actual needs.

[0026] In the optional solution provided by this utility model embodiment, the outer filter element 200 and the inner filter element 100 are separate structures: the outer filter element 200 is a cover with an opening at the top, the opening is connected to the receiving cavity 110, and the inner sidewall of the outer filter element 200 is provided with an outwardly recessed first hollow part, and at least a portion of the first flow channel 400 is formed between the first hollow part and the outer wall of the inner filter element 100.

[0027] Specifically, the outer filter element 200 and the inner filter element 100 are separate structures, and are joined by snap-fitting, bonding, or welding; see example. Figure 1 The inner wall of the outer filter element 200 is provided with a snap-fit ​​protrusion 210, and the outer wall of the inner filter element 100 is provided with a snap-fit ​​groove. The snap-fit ​​protrusion 210 engages with the snap-fit ​​groove. See also Figure 3Both the outer filter element 200 and the inner filter element 100 are provided with positioning holes 220. Positioning screws pass through two positioning holes 220 in sequence and are connected to the integrated plate (the integrated plate used to install the filter screen in the water environment monitoring equipment mentioned below). The inner sidewall of the outer filter element 200 is fitted with the outer sidewall of the inner filter element 100, and the first hollow part forms a first flow channel 400; or, there is a gap between the inner sidewall of the outer filter element 200 and the outer sidewall of the inner filter element 100, and this gap communicates with the first hollow part to form the first flow channel 400.

[0028] The first flow channel 400 is formed only by the first hollow part, which reduces the volume of the filter screen and achieves lightweighting; the first flow channel 400 is formed by the first hollow part and the gap between the outer filter element 200 and the inner filter element 100, which increases the volume of the first flow channel 400 and improves the water exchange rate.

[0029] In the optional solution provided by this utility model embodiment, the filter screen is an integral structure: the filter screen is an integrally formed cylindrical shape, and the side wall of the filter screen is provided with a first hollow portion extending along its height direction. The side wall of the filter screen includes an outer side wall and an inner side wall, and a first hollow portion is provided between the outer side wall and the inner side wall. The first hollow portion forms at least a portion of the first flow channel 400. The inner side wall forms the side wall of the inner filter element 100, and the outer side wall forms the side wall of the outer filter element 200.

[0030] Specifically, the filter screen is a one-piece structure, formed by processing using a mold to create a filter screen with an outer filter element 200 and an inner filter element 100; wherein, a first hollow portion is provided in the middle of the side wall of the filter screen. It is worth noting that the first flow channel 400 may be formed solely by the first hollow portion, or it may be formed by connecting the first hollow portion with other components.

[0031] The filter screen is molded in one piece, which enhances its strength and extends its service life.

[0032] Based on the two combination methods of the external filter element 200 and the internal filter element 100 described above, this utility model embodiment provides embodiments of the following various filter screen specific structures, all of which can be applied to the two combination methods of the external filter element 200 and the internal filter element 100 described above.

[0033] To achieve communication between the inner and outer filter elements and between the receiving cavity 110 within the inner filter element 100 and the outside of the outer filter element 200, the positions of the first flow port 410 and the second flow port 510 can be configured as needed. In the embodiments provided in this application, the first flow port 410 is provided on the side wall of the outer filter element 200, and / or, the first flow port 410 is provided on the bottom of the outer filter element 200; the second flow port 510 is provided on the bottom of the inner filter element 100, or, the second flow port 510 is provided on both the side wall and the bottom of the inner filter element 100. The positions of the first flow port 410 and the second flow port 510 can be combined in various ways. The following will describe possible implementation methods, but are not limited to the listed embodiments.

[0034] In Embodiment 1, the outer filter element 200 has a first flow port 410 on its side wall, and the inner filter element 100 has a second flow port 510 on both its side wall and bottom. Optionally, the second flow port 510 on the side wall of the inner filter element 100 is used for water inflow, and the second flow port at the bottom is used for water outflow.

[0035] The specific bottom structure of the inner filter element 100 and the outer filter element 200 can be varied: As a first optional implementation, the outer filter element 200 has a first flow port 410 on its side wall; the inner filter element 100 has a second flow port 510 on its side wall; the bottom of the outer filter element 200 is closed, and the portion of the bottom of the outer filter element 200 corresponding to the bottom of the inner filter element 100 has a third flow channel; the receiving cavity 110 inside the inner filter element 100 has a closed bottom, and the bottom of the inner filter element 100 has a second flow port 510 communicating with the third flow channel.

[0036] Specifically, the first flow port 410 is located on the side wall of the outer filter element 200. The first flow port 410 and the second flow port 510 located on the side wall of the inner filter element 100 are staggered along the circumference and axial direction of the filter screen, that is, the first flow port 410 is located between the two rows of flow ports on the side wall of the inner filter element 100. The side wall of the inner filter element 100 is provided with the second flow port 510, so that the water inside the first flow channel 400 can be exchanged with the water in the receiving cavity 110 through the second flow port 510. Wherein, the bottom of the outer filter element 200 is closed, and the part of the bottom corresponding to the bottom of the inner filter element 100 is provided with a third flow channel means that the outer filter element 200 has a bottom wall, and the part of the bottom wall corresponding to the inner filter element 100 has an opening or multiple through holes to form a third flow channel; optionally, the third flow channel can be set as a single channel covering the bottom of the inner filter element 100, or it can include multiple channels arranged at intervals. The inner filter element 100 has a closed bottom in its internal cavity 110, meaning it has a bottom wall with a second flow port 510. When the third flow channel includes multiple channels (or through holes), these channels are offset from the second flow port 510 located on the bottom wall of the inner filter element 100. This embodiment has the advantage that both the outer filter element 200 and the inner filter element 100 have bottom walls, improving the filter's strength and extending its service life. The offset arrangement of the multiple channels (or through holes) and the second flow port prevents ambient light from directly entering the cavity from the bottom, further reducing ambient light interference.

[0037] As a second optional implementation, the outer filter element 200 has a first flow port 410 on its side wall; the inner filter element 100 has a second flow port 510 on both its side wall and bottom; the bottom of the outer filter element 200 is closed, and the portion of the bottom of the outer filter element 200 corresponding to the bottom of the inner filter element 100 has a third flow channel; the bottom of the receiving cavity 110 inside the inner filter element 100 is open, and the open portion of the receiving cavity 110 forms a second flow port 510 that communicates with the third flow channel.

[0038] Specifically, the difference between this embodiment and the first embodiment is that the bottom of the inner filter element 100 is open, and this open bottom of the inner filter element 100 is used to communicate with the third flow channel. The advantage of this embodiment is that it simplifies the structure of the inner filter element 100 and reduces the weight of the filter screen.

[0039] In embodiment two, the bottom of the outer filter element 200, corresponding to the bottom end of the first hollow portion, is provided with a first flow port 410, and the inner filter element 100 is provided with a second flow port 510 on both its side wall and bottom. Optionally, the second flow port 510 on the side wall of the inner filter element 100 is used for water inflow, and the second flow port 510 on the bottom is used for water outflow.

[0040] In a third embodiment, the bottom of the outer filter element 200 is provided with a first flow port 410 on the part corresponding to the bottom end of the first hollow portion, and the side wall of the inner filter element 100 is provided with a second flow port 510; the bottom of the outer filter element 200 is closed, and the part of the bottom of the outer filter element 200 corresponding to the bottom of the inner filter element 100 is provided with a third flow channel, the receiving cavity 110 provided inside the inner filter element 100 has a closed bottom, and the bottom of the inner filter element 100 is provided with a second flow port 510 communicating with the third flow channel.

[0041] Specifically, the first flow port 410 is located at the bottom of the outer filter element 200, and the position of the first flow port 410 corresponds to the position of the first hollow part. The axis of the first flow port 410 is straight and parallel to the axis of the outer filter element 200. One end of the first flow port 410 is connected to the first hollow part, and the other end is connected to the outside of the outer filter element 200, thus shortening the length of the first flow port 410 and accelerating the flow of water into or out of the first hollow part. The side wall of the inner filter element 100 is provided with a second flow port 510, which allows the water inside the first flow channel 400 to exchange with the water in the receiving cavity 110 through the second flow port 510. In this embodiment, the bottom of the outer filter element 200 is closed, and the portion of its bottom corresponding to the bottom of the inner filter element 100 has a third flow channel. This means that the outer filter element 200 has a bottom wall, and the portion of the bottom wall corresponding to the inner filter element 100 has an opening or multiple through holes to form the third flow channel. Optionally, the third flow channel can be a single channel covering the bottom of the inner filter element 100, or it can include multiple channels arranged at intervals. The receiving cavity 110 inside the inner filter element 100 has a closed bottom, meaning that the inner filter element 100 has a bottom wall, and the bottom wall also has multiple second flow ports 510. When the third flow channel includes multiple channels, the multiple channels are staggered with the second flow ports 510 arranged on the bottom wall of the inner filter element 100. The advantage of this embodiment is that both the outer filter element 200 and the inner filter element 100 have bottom walls, which improves the strength of the filter screen and extends its service life. In addition, the staggered arrangement of multiple channels (or through holes) and second flow ports can prevent ambient light from directly entering the receiving cavity from the bottom, further reducing ambient light interference.

[0042] As a fourth optional implementation, a first flow port 410 is provided on the bottom of the outer filter element 200 corresponding to the bottom end of the first hollow portion, and a second flow port 510 is provided on the side wall of the inner filter element 100; the bottom of the outer filter element 200 is closed, and a third flow channel is provided on the bottom of the outer filter element 200 corresponding to the bottom of the inner filter element 100; the bottom of the receiving cavity 110 provided inside the inner filter element 100 is open, and the opening of the receiving cavity 110 forms a second flow port 510 that communicates with the third flow channel.

[0043] Specifically, the third flow channel at the bottom of the outer filter element 200 includes multiple spaced channels; the bottom opening of the inner filter element 100 communicates with the third flow channel. The advantage of this implementation is that it simplifies the structure of the inner filter element 100 and reduces the weight of the filter screen.

[0044] As a fifth implementation method, see Figures 1 to 3 The bottom of the outer filter element 200 is provided with a first flow port 410 on the part corresponding to the bottom end of the first hollow part, and the side wall of the inner filter element 100 is provided with a second flow port 510; the bottom of the outer filter element 200 is open to form a third flow channel and the first flow port 410, the receiving cavity 110 provided inside the inner filter element 100 has a closed bottom, and the bottom of the inner filter element 100 is provided with a second flow port 510 communicating with the third flow channel.

[0045] Specifically, the bottom of the outer filter element 200 is open, and the inner filter element 100 has a bottom wall with multiple second flow ports 510; this allows the first hollow portion to communicate with the outside, and the inner filter element 100 to communicate with the outside. The advantage of this embodiment is that it simplifies the structure of the outer filter element 200 and reduces the weight of the filter screen. Figure 3 The arrows in the diagram indicate the direction of water flow.

[0046] In embodiment 3, the outer filter element 200 has a first flow port 410 on its side wall; and the outer filter element 200 has a first flow port 410 at its bottom; the inner filter element 100 has a second flow port 510 on both its side wall and bottom.

[0047] As a sixth alternative implementation, see [link to relevant documentation]. Figures 4 to 6 The outer filter element 200 has multiple first flow ports 410 on its side wall; the inner filter element 100 has multiple second flow ports 510 on its side wall; the bottom of the outer filter element 200 is open to form a third flow channel and the first flow ports 410; the inner filter element 100 has a closed bottom in its internal receiving cavity 110; and the bottom of the inner filter element 100 has multiple second flow ports 510 that communicate with the third flow channel.

[0048] Specifically, the bottom of the external filter element 200, corresponding to the bottom end of the first hollow portion, and the sidewall of the external filter element 200 are both provided with first flow ports 410. This embodiment increases the area of ​​the first flow ports 410, thereby improving the water exchange rate. Figure 6 The arrows in the diagram indicate the direction of water flow.

[0049] As a seventh alternative implementation, a first flow port 410 is disposed on the bottom of the outer filter element 200 corresponding to the bottom end of the first hollow portion and on the side wall of the outer filter element 200, and a second flow port 510 is disposed on the side wall of the inner filter element 100; the bottom of the outer filter element 200 is closed, and a third flow channel is disposed on the bottom of the outer filter element 200 corresponding to the bottom of the inner filter element 100, and the receiving cavity 110 disposed inside the inner filter element 100 has a closed bottom, and the bottom of the inner filter element 100 is provided with a second flow port 510 communicating with the third flow channel.

[0050] Specifically, the bottom of the external filter element 200, corresponding to the bottom end of the first hollow portion, and the sidewall of the external filter element 200 are both provided with first flow ports 410. This embodiment increases the area of ​​the first flow ports 410 and improves the water exchange rate.

[0051] As an eighth optional embodiment, a first flow port 410 is provided on the bottom of the outer filter element 200 corresponding to the bottom end of the first hollow portion and on the side wall of the outer filter element 200, and a second flow port 510 is provided on the side wall of the inner filter element 100; the bottom of the outer filter element 200 is closed, and a third flow channel is provided on the bottom of the outer filter element 200 corresponding to the bottom of the inner filter element 100, and the bottom of the receiving cavity 110 provided inside the inner filter element 100 is open, and the opening of the receiving cavity 110 forms a second flow port 510 that communicates with the third flow channel.

[0052] Specifically, the bottom of the external filter element 200, corresponding to the bottom end of the first hollow portion, and the sidewall of the external filter element 200 are both provided with first flow ports 410. This embodiment increases the area of ​​the first flow ports 410 and improves the water exchange rate.

[0053] In embodiment four, the side wall of the outer filter element 200 is provided with a first flow port 410, and the bottom of the inner filter element 100 is provided with a second flow port 510.

[0054] As a ninth optional embodiment, a second hollow portion communicating with the first hollow portion is provided between the bottom of the inner filter element 100 and the bottom of the outer filter element 200. A first flow port 410 is provided on the side wall of the outer filter element 200. A second flow port 510 is provided at the bottom of the inner filter element 100, and the second flow port 510 communicates with the second hollow portion. The bottom of the outer filter element 200 is closed. A third flow channel is provided at the part of the bottom of the outer filter element 200 corresponding to the bottom of the inner filter element 100. The receiving cavity 110 provided inside the inner filter element 100 has a closed bottom. The bottom of the inner filter element 100 is provided with a second flow port 510 communicating with the third flow channel.

[0055] Specifically, in this embodiment, the top of the inner filter element 100 is connected to the top of the outer filter element 200, and there is a gap between the bottom of the inner filter element 100 and the bottom of the outer filter element 200, forming a second hollow portion; a first flow port 410 is disposed on the side wall of the outer filter element 200, and the bottom of the outer filter element 200 has a bottom wall, the bottom wall being provided with a third flow channel, the third flow channel including multiple spaced channels; the bottom of the inner filter element 100 has a bottom wall, the bottom wall being provided with multiple second flow ports 510. It is worth noting that in this embodiment, the inner filter element 100 and the outer filter element 200 are integrally formed or are separate structures with top snap-fit ​​connections. The advantage of this embodiment is that it blocks the direct irradiation of light into the receiving cavity.

[0056] As a tenth alternative implementation, see Figures 7 to 14 , Figure 10 and Figure 14 The middle arrow indicates a flow direction of water passing through the filter screen; a second hollow part communicating with the first hollow part is provided between the bottom of the inner filter element 100 and the bottom of the outer filter element 200; a first flow port 410 is provided on the side wall of the outer filter element 200; a second flow port 510 is provided at the bottom of the inner filter element 100, and the second flow port 510 is communicating with the second hollow part; the bottom of the outer filter element 200 is closed; a third flow channel is provided at the part of the bottom of the outer filter element 200 corresponding to the bottom of the inner filter element 100; the bottom of the receiving cavity 110 provided inside the inner filter element 100 is open; the opening of the receiving cavity 110 forms a second flow port 510 communicating with the third flow channel.

[0057] Specifically, the bottom of the inner filter element 100 is open, forming a second flow port 510. The advantage of this embodiment is that it simplifies the structure of the inner filter element 100 and reduces the weight of the filter screen.

[0058] In the ninth and tenth embodiments described above, optionally, the second hollow portion is provided with a guide surface 600 that slopes outward from the bottom of the first hollow portion toward the bottom of the filter element 200.

[0059] Specifically, the angle between the guide surface 600 and the bottom of the external filter element 200 is set to 5°-20°, for example, 5°, 15° or 20°.

[0060] The guide surface is inclined at 600 degrees to guide the water flow and to guide impurities to avoid sedimentation.

[0061] In the optional solution provided by this utility model embodiment, the filter screen also includes a base plate 300, which is connected to the bottom of the outer filter element 200, and a gap is provided between the base plate 300 and the bottom of the outer filter element 200.

[0062] Specifically, the base plate 300 can cover the bottom of the outer filter element 200 and is made of light-shielding material.

[0063] The bottom plate 300 is connected to the bottom of the external filter element 200, and there is a gap between the bottom plate 300 and the bottom of the external filter element 200, so that water can flow into or out of the receiving cavity 110 through the gap between the bottom of the bottom plate 300 and the bottom of the external filter element 200. The bottom plate 300 can prevent ambient light from entering the receiving cavity 110, enhance the light-shielding effect, and further improve the detection accuracy.

[0064] As one implementation method, see Figures 8 to 10 The base plate 300 includes a connecting part 310 and a light-shielding part 320. One end of the connecting part 310 is connected to the external filter 200, and the other end is connected to the light-shielding part 320. The thickness of the light-shielding part 320 gradually decreases from the end near the connecting part 310 to the end away from the connecting part 310.

[0065] Specifically, see Figure 8 The thickness of the light-shielding part 320 gradually decreases from the middle to both sides, so that the gap between the light-shielding part 320 and the bottom of the outer filter 200 gradually decreases from the outside of the outer filter 200 to the inside of the outer filter 200, thereby guiding the water, accelerating the water flow rate, and avoiding the problem of sedimentation on the light-shielding part 320.

[0066] The connecting part 310 connects the bottom of the base plate 300 to the bottom of the external filter element 200, and the light-shielding part 320 shields the bottom of the external filter element 200. The thickness variation of the light-shielding part 320 achieves a flow guiding effect, thereby accelerating the water exchange efficiency.

[0067] As another implementation method, see Figures 11 to 14 The base plate 300 includes multiple connectors 330 and light-shielding parts 320. One end of each connector 330 is connected to the outer filter 200, and the other end is connected to the light-shielding part 320. The multiple connectors 330 are arranged at intervals along the circumference of the filter screen.

[0068] Specifically, the connector 330 is configured as a telescopic component, and the distance between the light-shielding part 320 and the external filter 200 can be adjusted by adjusting the length of the connector 330; or, the connector 330 is detachably connected to the external filter 200 and the light-shielding part 320, for example, by plugging in, and the distance between the light-shielding part 320 and the external filter 200 can be adjusted by replacing the connector 330 with different lengths.

[0069] The connector 330 connects the light-shielding part 320 to the external filter 200, and creates a gap between the light-shielding part 320 and the external filter 200 to facilitate water exchange.

[0070] The water environment monitoring device provided in this embodiment includes a filter screen, and therefore possesses all the beneficial effects of a filter screen, which will not be elaborated here.

[0071] In the optional solution provided by this utility model embodiment, the water environment monitoring equipment includes a monitoring device, which is detachably connected to the filter screen, and the monitoring end of the monitoring device is located in the receiving cavity 110 of the inner filter element 100.

[0072] Specifically, the monitoring device includes a monitoring probe and a housing with a closed chamber. An integrated plate is located at one end of the housing. The monitoring probe is mounted on the integrated plate, and the monitoring part of the probe extends out of the closed chamber from the integrated plate. A filter screen is detachably connected to the integrated plate, and the monitoring part is located within the filter screen's receiving cavity 110. Furthermore, the filter screen is snap-fitted to the integrated plate. The aforementioned monitoring device can be a water environment monitoring device or a sediment monitoring device, which may include quantum dot spectral probes, pH probes, etc.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended 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 therein. Such 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. A filter screen, characterized in that include: Internal filter element (100) and external filter element (200); The outer filter element (200) is sleeved on the outside of the inner filter element (100), and the outer filter element (200) and the inner filter element (100) are fixed relative to each other. The inner filter element (100) is provided with a receiving cavity (110). A first flow channel (400) is provided between the outer filter element (200) and the inner filter element (100). The first flow channel (400) includes a first flow port (410) communicating with the outside of the outer filter element (200). The bottom of the outer filter element (200) is provided with a third flow channel communicating with the receiving cavity (110). The inner filter element (100) is provided with a second flow channel communicating with the receiving cavity (110). The second flow channel includes a plurality of second flow ports (510). The first flow channel (400), the second flow channel, and the third flow channel are connected to enable the receiving cavity (110) of the inner filter element (100) to communicate with the outside of the outer filter element (200). The first flow port (410) and the second flow port (510) are staggered.

2. The filter screen according to claim 1, characterized in that, The external filter element (200) has the first flow port (410) on its side wall, and / or the external filter element (200) has the first flow port (410) at its bottom. The bottom of the inner filter element (100) is provided with the second flow port (510), or the side wall and bottom of the inner filter element (100) are both provided with the second flow port (510).

3. The screen of claim 2, wherein, The outer filter element (200) is a cover with an opening at the top, the opening communicating with the receiving cavity (110). The inner sidewall of the outer filter element (200) is provided with an outwardly recessed first hollow portion, and at least a portion of the first flow channel (400) is formed between the first hollow portion and the outer wall of the inner filter element (100); or, The filter screen is an integrally formed cylindrical shape. The side wall of the filter screen is provided with a first hollow portion extending along its height direction. The side wall of the filter screen includes an outer side wall and an inner side wall. The first hollow portion is provided between the outer side wall and the inner side wall. The first hollow portion forms at least part of the first flow channel (400). The inner side wall forms the side wall of the inner filter element (100), and the outer side wall forms the side wall of the outer filter element (200).

4. The screen of claim 3, wherein, The first flow port (410) is provided on the bottom of the outer filter element (200) corresponding to the bottom end of the first hollow part, or the first flow port (410) is provided on the side wall of the outer filter element (200); the second flow port (510) is provided on the side wall of the inner filter element (100), wherein: The bottom of the outer filter element (200) is closed, and the bottom of the outer filter element (200) is provided with the third flow channel in the part corresponding to the bottom of the inner filter element (100). The receiving cavity (110) provided inside the inner filter element (100) has a closed bottom, and the bottom of the inner filter element (100) is provided with the second flow port (510) communicating with the third flow channel. Alternatively, the bottom of the outer filter element (200) is closed, and the bottom of the outer filter element (200) is provided with the third flow channel in the part corresponding to the bottom of the inner filter element (100). The bottom of the receiving cavity (110) provided inside the inner filter element (100) is open, and the opening of the receiving cavity (110) forms the second flow port (510) communicating with the third flow channel. Alternatively, the bottom of the outer filter (200) is open to form the third flow channel and the first flow port (410) at the bottom, the inner filter (100) has a receiving cavity (110) with a closed bottom, and the bottom of the inner filter (100) has a second flow port (510) communicating with the third flow channel.

5. The screen of claim 3, wherein, The first flow port (410) is disposed at the bottom of the outer filter element (200) corresponding to the bottom end of the first hollow portion and on the side wall of the outer filter element (200), and the side wall of the inner filter element (100) is provided with the second flow port (510), wherein: The bottom of the outer filter element (200) is closed, and the bottom of the outer filter element (200) is provided with the third flow channel in the part corresponding to the bottom of the inner filter element (100). The receiving cavity (110) provided inside the inner filter element (100) has a closed bottom, and the bottom of the inner filter element (100) is provided with the second flow port (510) communicating with the third flow channel. Alternatively, the bottom of the outer filter element (200) is closed, and the bottom of the outer filter element (200) is provided with the third flow channel in the part corresponding to the bottom of the inner filter element (100). The bottom of the receiving cavity (110) provided inside the inner filter element (100) is open, and the opening of the receiving cavity (110) forms the second flow port (510) communicating with the third flow channel. Alternatively, the bottom of the outer filter (200) is open to form the third flow channel and the first flow port (410), the inner filter (100) has a closed bottom in the receiving cavity (110), and the bottom of the inner filter (100) is provided with a second flow port (510) communicating with the third flow channel.

6. The screen of claim 3, wherein A second hollow portion communicating with the first hollow portion is provided between the bottom of the inner filter element (100) and the bottom of the outer filter element (200). The first flow port (410) is provided on the side wall of the outer filter element (200). The bottom of the inner filter element (100) is provided with the second flow port (510), which communicates with the second hollow portion. The bottom of the outer filter element (200) is closed, and the bottom of the outer filter element (200) is provided with the third flow channel in the part corresponding to the bottom of the inner filter element (100). The receiving cavity (110) provided inside the inner filter element (100) has a closed bottom, and the bottom of the inner filter element (100) is provided with the second flow port (510) communicating with the third flow channel. Alternatively, the bottom of the outer filter element (200) is closed, and the bottom of the outer filter element (200) is provided with the third flow channel in the part corresponding to the bottom of the inner filter element (100). The bottom of the receiving cavity (110) provided inside the inner filter element (100) is open, and the opening of the receiving cavity (110) forms the second flow port (510) that communicates with the third flow channel.

7. The screen of claim 6, wherein, The second hollow portion is provided with a guide surface (600) that slopes from the bottom of the first hollow portion toward the bottom of the outer filter element (200).

8. The filter screen according to any one of claims 1 to 7, characterized in that, It also includes a base plate (300) which is connected to the bottom of the external filter element (200), and a gap is provided between the base plate (300) and the bottom of the external filter element (200).

9. The screen of claim 8, wherein, The base plate (300) includes a connecting part (310) and a light-shielding part (320). One end of the connecting part (310) is connected to the external filter (200), and the other end is connected to the light-shielding part (320). The thickness of the light-shielding portion (320) gradually decreases from one end near the connecting portion (310) to the end away from the connecting portion (310); or, The base plate (300) includes a plurality of connectors (330) and a light-shielding part (320). One end of each connector (330) is connected to the outer filter (200), and the other end is connected to the light-shielding part (320). The plurality of connectors (330) are arranged at intervals along the circumference of the filter.

10. A water environment monitoring apparatus characterized by comprising: Includes a filter screen as described in any one of claims 1-9 and a monitoring device, wherein the monitoring device is detachably connected to the filter screen and the monitoring end of the monitoring device is located in the receiving cavity (110) of the inner filter element (100).

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