A passive self-cleaning water quality filtering and sampling device

Abstract

The present invention provides a self - cleaning water quality filtration and sampling device without power source, which relates to the technical field of water quality monitoring and sampling. It includes a rectifying cone, a porous ceramic filter ball and a sampling outer tube arranged in sequence along the water flow direction. The rectifying cone is a semi - conical shape cut along the central axis, and the cutting plane is close to the bottom of the water body environment. The conical surface of the rectifying cone is the water - facing surface, and an inlet port group is arranged on the water - facing surface, and an arc surface is milled at the end. The porous ceramic filter ball is embedded between the end of the rectifying cone and the front end of the sampling outer tube and can rotate. An outlet port group is arranged on the side wall at the end of the sampling outer tube. A sampling inner tube is introduced from the end of the sampling outer tube, and the front end of the sampling inner tube extends into the static water area formed behind the porous ceramic filter ball for water quality sampling. The sampling device provided by the present invention filters debris and has self - cleaning without power source. It is not only safe to use, but also has a long service life, is not easily damaged and deformed, can reduce the number of repairs and replacements, and has a low manufacturing cost, making it suitable for wide - range popularization and application.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality monitoring and sampling, and particularly to a self-cleaning water quality filtering and sampling device without power source. Background Art

[0002] Water environment monitoring requires sampling water bodies to analyze their components. Online monitoring systems continuously sample, and sampling devices are installed in the water body environment to be detected for a long time. There are sundries such as branches, leaves, domestic garbage, and sediment in the water body environment, which are likely to block the water inlet of the sampling device, resulting in sampling failure.

[0003] In the prior art, the following three methods are mainly used to avoid blockage. 1. The sampling device is covered with a stainless steel mesh to prevent sundries from entering; 2. An air compressor is used for aeration to flush out the blockage; 3. A floating platform is used, and by controlling the direction of the sampling port, the sampling port is made to face away from the water flow direction to reduce the chance of inhaling sundries. These measures prevent blockage to a certain extent and improve usability, but there are certain defects. The stainless steel mesh is easily hooked by garbage, causing the sampling device and the support structure to break and be lost under the impact of water flow; compressed air aeration requires the configuration of an air compressor, and due to its high voltage and power requirements, solar power supply is difficult to meet; the floating device is easily deformed and damaged under the impact of water flow. These disadvantages result in a short service life of the sampling equipment, and it needs to be frequently repaired and replaced.

[0004] Therefore, it is necessary to develop a water quality sampling device with self-filtering and self-cleaning without power source. Summary of the Invention

[0005] For this purpose, the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, so as to provide a self-cleaning water quality filtering and sampling device without power source, which filters sundries without power source, is not only safe to use, but also has a long service life, is not easily damaged and deformed, can reduce the number of repairs and replacements, has a relatively low manufacturing cost, and is suitable for large-scale popularization and application.

[0006] To achieve the above object, the present invention provides a self-cleaning water quality filtering and sampling device without power source, including a rectifying cone, a porous ceramic filter ball, a sampling outer tube, and a sampling inner tube shielded and protected by the sampling outer tube, which are sequentially arranged along the water flow direction.

[0007] The rectifying cone is a semi-conical shape cut along the central axis, and the cut plane is close to the bottom of the water body environment. The conical surface of the rectifying cone is the water-facing surface, and a water inlet group is arranged on the water-facing surface;

[0008] The porous ceramic filter ball is embedded between the end of the rectifying cone and the front end of the sampling outer tube and can rotate;

[0009] An outlet group is provided on the side wall at the end of the sampling outer tube. The sampling inner tube is introduced from the end of the sampling outer tube, and the front end of the sampling inner tube extends into the static water area formed behind the ceramic filter balls for water quality sampling.

[0010] Further, the water inlet group includes a first water inlet group and a second water inlet group respectively located on opposite sides of the water-facing surface, and the total water inlet area of the first water inlet group is not equal to the total water inlet area of the second water inlet group.

[0011] Further, the first water inlet group and the second water inlet group are water inlet slits with different numbers, and the water inlet slits on both sides are staggered in height. Due to uneven force, the porous ceramic filter balls are embedded between the flow rectifying cone and the sampling outer tube and rotate under the push of water flow.

[0012] Further, the pore diameter of the filter holes is between 0.45 and 180 microns.

[0013] Further, a sharp cutting edge is provided at the intersection of the filter holes and the surface of the ceramic filter balls.

[0014] Further, a support frustum with its tip facing the ceramic filter balls is provided at the end of the sampling outer tube. The sampling inner tube penetrates into the support frustum from the end and passes out from the front end of the support frustum, and the outlet group is provided at the position of the sampling outer tube corresponding to the side surface of the support frustum.

[0015] Further, the outlet group includes a plurality of outlets circumferentially spaced on the sampling outer tube.

[0016] Further, the total water inlet area of the water inlet group is smaller than the total water outlet area of the outlet group.

[0017] Further, the flow rectifying cone and the sampling outer tube are fixed on the quick-installation bottom plate by bolts, and then the quick-installation bottom plate is installed in the water environment.

[0018] Further, the end of the sampling outer tube is hermetically connected with a steel corrugated hose through an external hexagonal nut, and the sampling inner tube leads all the way from the inside of the corrugated hose to the ground.

[0019] A self-cleaning water quality filtering and sampling device without external power source provided by the present invention. The sewage in the pipeline has a certain flow rate. When flowing through the flow rectifying cone, large-volume sundries are blocked outside. The conical surface of the flow rectifying cone is inclined and smooth, and will not hook garbage and sundries. The sewage enters the flow rectifying cone from the water inlet group and is filtered by the ceramic filter balls when passing through to meet the water quality filtering standard. The sampling device itself does not require external energy, filters sundries and self-cleans, is not only safe to use, but also has a long service life, is not easily damaged and deformed, can reduce the number of repairs and replacements, has a low manufacturing cost, and is suitable for wide-range popularization and application. Description of the Drawings

[0020] To more clearly illustrate the technical solutions of the specific embodiments of the present invention, the present invention will be further described in detail below according to the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] The descriptions of the reference numerals in the drawings are as follows.

[0023] 100, rectifying cone; 110, water-facing surface; 120, water inlet slit; 200, ceramic filter ball; 210, filter hole; 300, sampling outer tube; 310, water outlet; 400, sampling inner tube; 500, static water area; 600, supporting frustum; 700, quick-installation bottom plate; 800, corrugated hose; 900, external hexagonal nut. Specific embodiments

[0024] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "front", "upper", "lower", "left", "right", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0026] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Such as Figure 1As shown in the figure, a self-cleaning water quality filtering and sampling device without power source includes a rectifying cone 100, a porous ceramic filter ball 200, and a sampling outer tube 300 arranged in sequence along the water flow direction. In this embodiment, taking the water flow direction as the standard, the upstream is the front end and the downstream is the end. The porous ceramic filter ball 200 is embedded at the end of the rectifying cone 100 and the front end of the sampling outer tube 300. Then, the rectifying cone 100 and the sampling outer tube 300 are fixed on the quick-installation bottom plate 700 by bolts, and then the quick-installation bottom plate 700 is installed in the water environment. In this embodiment, if the water environment is a sewage pipe, the quick-installation bottom plate 700 is installed and fixed on the base on the inner wall of the pipe.

[0028] An inlet group is formed on the side wall of the rectifying cone 100, which is a slit in this embodiment. The sewage in the pipe enters the rectifying cone 100 from the slit, and the slit prevents large-volume debris from entering the cone. The pore diameter of the filter holes 210 of the porous ceramic filter ball 200 is between 0.45 and 180 microns. In this embodiment, the pore diameter of the filter holes 210 is preferably 1.6 microns. The roughly filtered sewage flows through the slit, and the ceramic filter ball 200 performs a second filtration on the sewage. After two filtrations, larger-volume debris in the water quality is removed, making the sewage to be sampled meet the COD and BOD filtration standards. A sampling inner tube 400 is arranged to extend into the end of the sampling outer tube 300, and the sewage is sampled through the sampling inner tube 400.

[0029] Specifically, the rectifying cone 100 is semi-conical, and its specific shape is one half of the cone body after being cut along the central axis plane passing through the cone top and perpendicular to the center point of the bottom surface. During installation, the cut plane is attached to the quick-installation bottom plate 700. The conical surface of the rectifying cone 100 is inclined and smooth, so that there is no place for debris to hang, and thus the sampling device will not be torn. The conical surface of the rectifying cone 100 is the water-facing surface 110. The rectifying cone 100 can be a semi-cone or a semi-pyramid.

[0030] In this embodiment, the sewage in the pipe has a certain flow rate. When flowing through the rectifying cone 100, large-volume debris is blocked outside and will not hang on the rectifying cone 100. The sewage enters the rectifying cone 100, and the ceramic filter ball 200 performs a second filtration on the sewage. The water quality sample collected by the sampling inner tube 400 meets the filtration standards. The sampling device itself does not require energy, filters debris and self-cleans, is not only safe to use, but also has a long service life, is not easily damaged and deformed, and can reduce the number of repairs and replacements.

[0031] An outlet group is provided on the side wall at the end of the sampling outer tube 300. The water entering the sampling device from the inlet group will not all be sampled and obtained by the sampling inner tube 400, and the excess water is discharged from the outlet group. The porous ceramic filter balls 200 are clamped by the rectifying cone 100 and the sampling outer tube 300. Since the rear of the ceramic filter balls 200 is blocked, a relatively static water area 500 will be formed. The water flow velocity in the static water area 500 is slow, and the front end of the sampling inner tube 400 extends into the static water area 500 for water quality sampling. The water flow velocity outside the sampling outer tube 300 is greater than the water flow velocity inside the sampling inner tube 400. The greater the water flow velocity, the smaller the edge pressure. Therefore, the surplus water inside the sampling outer tube 300 will be sucked out from the outlet group.

[0032] Although the large-volume sundries in the water entering the rectifying cone 100 are filtered out, there are still sundries such as mud and sand in it. The ceramic filter balls 200 are embedded at the end of the rectifying cone 100. Therefore, particulate matters will accumulate in the gaps. In order to discharge these particulate matters, in this embodiment, the ceramic filter balls 200 are movably embedded with the rectifying cone 100 and the sampling outer tube 300, that is, the ceramic filter balls 200 can rotate. The water flow has a driving force. Therefore, in this embodiment, the driving force of the water flow is utilized to make the ceramic filter balls 200 rotate, so as to grind and break the particulate matters. The specific scheme is that the inlet group includes a first inlet group and a second inlet group respectively located on opposite sides of the water-facing surface 110. The total inlet area of the first inlet group is not equal to the total inlet area of the second inlet group. This makes the amount of water entering the rectifying cone 100 per unit time inconsistent. When the flow velocities are roughly equal, the amounts of water on both sides are inconsistent, so that the forces acting on both sides of the ceramic filter balls 200 are uneven, and the ceramic filter balls 200 are pushed to rotate. And due to the fluctuation of the flow velocity vector, the rotation direction is random. The particulate matters stuck between the rectifying cone 100 and the ceramic filter balls 200 and between the ceramic filter balls 200 and the sampling outer tube 300 are cut and ground under the rotation of the ceramic filter balls 200, and are discharged into the pipeline after being broken along with the water flow.

[0033] In order to increase the grinding and breaking effect, sharp edges are provided at the intersections of both ends of the filter holes 210 and the surface of the ceramic filter balls 200. During the rotation of the ceramic filter balls 200, the sharp edges are beneficial to grinding and breaking the particulate matters.

[0034] A solid glass ball can also be embedded between the rectifying cone 100 and the sampling outer tube 300. The glass ball can rotate in any direction under the disturbance of the water flow and closely adheres to the front end of the sampling outer tube 300 under the water flow pressure to prevent impurities from entering. The glass ball is suitable for sampling relatively clean surface water.

[0035] Specifically, the first water inlet group consists of three water inlet slits 120, and the second water inlet group consists of two water inlet slits 120. The water inlet slits 120 are all in the shape of waist-shaped holes. The waist-shaped water inlet slits 120 are the preferred shape in this embodiment, but not the only limitation on the shape of the water inlet slits 120. The first water inlet group and the second water inlet group are respectively located on opposite sides of the conical surface 110, and the water inlet slits 120 on both sides are staggered in height.

[0036] The water outlet group includes a plurality of water outlets 310, and the plurality of water outlets 310 are arranged at intervals on the circumferential side surface of the sampling outer tube 300. The water flow velocity in the sampling outer tube 300 is high and the pressure is low, so that the excess water and impurities inside the sampling outer tube 300 are adsorbed and discharged from the water outlets 310. The water outlets 310 are in the shape of waist-shaped holes. The waist-shaped water outlets 310 are the preferred shape in this embodiment, but not the only limitation on the shape of the water outlets 310.

[0037] The total water outlet area of the water outlet group is larger than the total water inlet area of the water inlet group, so that the excess water and impurities can be discharged in time to ensure the freshness of the water sample inside the sampling outer tube 300.

[0038] A support frustum 600 with its tip facing the ceramic filter ball 200 is provided at the end of the sampling outer tube 300. The support frustum 600 is in the shape of a frustum of a cone, with a skirt at the bottom. A step is milled on the inner surface at the end of the sampling outer tube 300 to accommodate the skirt, and it is sealed and pressed by an external hexagonal nut 900. The sampling inner tube 400 passes through the bottom surface of the support frustum 600 and passes out from the front end of the support frustum 600, and the front end of the sampling inner tube 400 extends into the still water area 500 for water quality sampling. The water outlets 310 are provided on the sampling outer tube 300 corresponding to the side surface of the support frustum 600. By providing the support frustum 600, it plays a role in stabilizing and supporting the sampling inner tube 400, so that the sampling inner tube 400 will not be bent and deformed under the impact of water flow, which is beneficial to water sampling. At the same time, the support frustum 600 compresses the internal space at the end of the sampling outer tube 300, so that the surplus water sample and impurities will not deposit at the end of the sampling outer tube 300, and the side slope of the support frustum 600 compresses the volume of the sampling outer tube, making the flow velocity at the end faster, which is beneficial to the discharge of the surplus water sample and impurities.

[0039] The end of the sampling outer tube 300 is hermetically connected with a steel bellows through an external hexagonal nut 900, and the bellows extends all the way to the ground. The sampling inner tube 400 is arranged inside the bellows and also extends all the way to the ground. The bellows can not only be bent, but also has a certain hardness on its steel surface, which can effectively prevent the sampling inner tube 400 from being squeezed and damaged. When sampling water quality, the water quality can be sucked through the sampling inner tube 400 on the ground.

[0040] In this embodiment, the conical surface of the rectifying cone 100 is the water-facing surface 110, which resists the impact of water flow and requires relatively high hardness and corrosion resistance, while the remaining components only need to have strong corrosion resistance. For example, the sampling inner tube 400 can be a common water pipe in daily life, and the steel bellows can be a general bellows used for water heaters. This makes the manufacturing cost of this sampling device relatively low while ensuring product quality, and it is suitable for wide promotion and use.

[0041] The present invention is not limited to the above embodiments. Structures that are the same as or similar to the above embodiments, different pipe diameters, different filter ball materials, diameters, filter hole sizes (including no filter holes), different forms of guiding cones, different forms of quick-install bottom plate combinations, shapes, different numbers, positions, directions, and sizes of slits, different numbers, shapes, sizes, and chamfer forms of waist-shaped holes are all within the protection scope of the present invention.

[0042] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A passive self-cleaning water quality filtering and sampling device, characterized in that, It includes a flow straightening cone (100), a porous ceramic filter ball (200), and a sampling outer tube (300) arranged in sequence along the water flow direction; The flow straightening cone (100) is a semi-cone shape cut along the central axis, and the cutting plane is close to the bottom of the water environment. The conical surface of the flow straightening cone (100) is the water inlet surface (110), and a water inlet group is provided on the water inlet surface (110); The porous ceramic filter ball (200) is embedded between the end of the flow straightening cone (100) and the front end of the sampling outer tube (300) and can rotate; A water outlet (310) group is provided on the side wall at the end of the sampling outer tube (300). A sampling inner tube (400) is introduced from the end of the sampling outer tube (300), and the front end of the sampling inner tube (400) extends into the static water area (500) formed behind the porous ceramic filter ball (200) for water quality sampling; A sharp edge is provided at the intersection of the filter holes (210) of the porous ceramic filter ball (200) and the surface of the porous ceramic filter ball (200); The water inlet group includes a first water inlet group and a second water inlet group located on opposite sides of the water inlet surface (110), and the total water inlet area of the first water inlet group is not equal to the total water inlet area of the second water inlet group; A support frustum (600) with a tip facing the porous ceramic filter ball (200) is provided at the end of the sampling outer tube (300). The sampling inner tube (400) penetrates into the support frustum (600) from the end and passes out from the front end of the support frustum (600). The water outlet (310) group is provided at a position on the sampling outer tube (300) corresponding to the side surface of the support frustum (600).

2. The self-cleaning water quality filtering and sampling device without power source according to claim 1, wherein , The first water inlet group and the second water inlet group are water inlet slits (120) with different numbers, and the water inlet slits (120) on both sides are staggered in height.

3. The self-cleaning water quality filtering and sampling device without power source according to claim 1, characterized in that , The aperture of the filter holes (210) of the porous ceramic filter ball (200) is 0.45 to 180 microns.

4. The self-cleaning water quality filtering and sampling device without power source according to claim 1, characterized in that , The water outlet (310) group includes a plurality of water outlets (310) arranged at intervals in the circumferential direction of the sampling outer tube (300).

5. The self-cleaning water quality filtering and sampling device without power source according to claim 1, wherein , The total water inlet area of the water inlet group is smaller than the total water outlet area of the water outlet (310) group.

6. The self-cleaning water quality filtering and sampling device without power source according to claim 1, wherein , The flow straightening cone (100) and the sampling outer tube (300) are fixed on a quick-installation bottom plate (700) by bolts, and then the quick-installation bottom plate (700) is installed in the water environment.

7. The self-cleaning water quality filtering and sampling device without power source according to claim 1, wherein , The end of the sampling outer tube (300) is hermetically connected with a steel corrugated hose (800) through an external hexagonal nut (900), and the sampling inner tube (400) leads from the inside of the corrugated hose (800) all the way to the ground.

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