A water quality detection device and detection method and application

Abstract

The present invention relates to the technical field of water quality detection, and specifically discloses a water quality detection device, detection method, and application, comprising: a magnetic adsorption chamber, in which a magnetic adsorption component is provided, and a drain pipe is provided at the bottom of the magnetic adsorption chamber; a water inlet pipe, used to guide the water body to be tested into the magnetic adsorption chamber after filtering, the water inlet pipe having a curved deceleration section, and the outlet end of the water inlet pipe is arranged horizontally; a flow guide connected to the outlet end of the water inlet pipe, the flow guide is arranged above the magnetic adsorption component, the cross-sectional channel of the flow guide is larger than the cross-sectional channel of the water inlet pipe, and a flow guide frame for passing the water body is provided at the bottom of the flow guide; a detection tube, connected to the space below the magnetic adsorption component in the magnetic adsorption chamber; and a water quality detection unit. The present invention adopts a power device, which can remove suspended matter, large particle impurities, and magnetic substances in sewage, and retain sludge in sewage, so as to improve the accuracy of water quality detection results and reduce damage to the detector.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality detection, and in particular to a water quality detection device, a detection method and an application. Background Art

[0002] Water quality testing is the process of evaluating the physical, chemical, and biological properties of water. Physical evaluation metrics include temperature, color, and turbidity; chemical evaluation metrics include pH, dissolved oxygen, biochemical oxygen demand (BOD) and chemical oxygen demand (COD), total hardness, heavy metals, and ammonia nitrogen; and biological evaluation metrics include total coliform bacteria and bacteria.

[0003] Water quality testing primarily targets drinking water and sewage. Sewage, however, contains interfering substances such as suspended matter, large particles, and magnetic impurities. These substances can affect not only the accuracy of test results but also the performance and lifespan of test equipment, especially precision instruments like TOC meters used to measure COD.

[0004] Therefore, for sewage testing, it is necessary to filter the water before conducting water quality testing to remove interfering substances.

[0005] The existing technology for sewage filtration treatment mainly uses a filter to remove suspended matter and large particles of impurities, and then uses a magnetic rod to absorb magnetic substances. The purpose of the existing technology is to purify water quality and the processing capacity is large. Therefore, power transmission is often used. Existing magnetic filtration devices such as Figure 1 As shown, water enters the magnetic adsorption chamber through an inlet pipe. The chamber is equipped with several vertically arranged magnetic adsorption rods. When water enters the magnetic adsorption chamber, the magnetic adsorption rods are immersed in the water to absorb magnetic substances in the water. The filtered water is then discharged through the upper drainage pipe of the magnetic adsorption chamber. Existing magnetic filtration devices use a bottom-in, top-out structure to facilitate the immersion of the magnetic rods in the water. Although the magnetic adsorption effect is good, it requires power equipment.

[0006] The above-mentioned filtration device is not suitable for water quality testing, because the filtration for water quality testing is to obtain the water sample to be tested, and the water processing volume is relatively small. The use of power equipment will result in unnecessary costs. The filtration for water quality testing is different from the filtration for water purification in that: the filtration for water purification needs to remove as much impurities as possible from the water body, while the filtration for water quality testing only needs to remove suspended matter, large particles and magnetic substances, while retaining the sludge that affects the detection of indicators such as turbidity and COD to ensure the accuracy of water quality testing. For example: For some pilot bases of filtration equipment, it is necessary to test the water quality of the sewage before treatment and the water after treatment by the filtration equipment to analyze the filtration effect of the filtration equipment. Summary of the Invention

[0007] The purpose of the present invention is to provide a water quality detection device that does not use power equipment and can remove suspended matter, large particle impurities and magnetic substances in sewage while retaining sludge in sewage, so as to improve the accuracy of water quality detection results and reduce damage to the detector.

[0008] In addition, the present invention also provides a detection method and application of the water quality detection device.

[0009] The present invention is achieved through the following technical solutions:

[0010] A water quality detection device, comprising:

[0011] A magnetic adsorption chamber is provided with a magnetic adsorption component therein for adsorbing magnetic substances in water, and a drainage pipe is provided at the bottom of the magnetic adsorption chamber;

[0012] The water inlet pipe is arranged at the top of the magnetic adsorption chamber, and is used to filter the water to be tested and introduce it into the magnetic adsorption chamber. The water inlet pipe has a curved slow-speed section, and the outlet end of the water inlet pipe is arranged horizontally;

[0013] A flow guide is connected to the outlet end of the water inlet pipe. The flow guide is arranged above the magnetic adsorption component. The cross-sectional channel of the flow guide is larger than the cross-sectional channel of the water inlet pipe. A flow guide frame for passing the water body is provided at the bottom of the flow guide;

[0014] The detection tube is connected to the space below the magnetic adsorption component in the magnetic adsorption chamber;

[0015] The water quality detection unit comprises a detector and a detection probe which can be inserted into a detection tube.

[0016] The present invention sets a detection tube connected to the magnetic adsorption chamber, filters and removes suspended matter, large particle impurities and magnetic substances into the water body entering the detection tube, and then directly inserts the instrument probe capable of online detection into the detection tube to perform online detection, such as pH value, dissolved oxygen, total hardness, turbidity, etc. The detector is used to detect indicators that cannot be detected online, such as COD.

[0017] First of all, the overall technical concept of the present invention is: to achieve the interception of impurities (suspended matter, large particle impurities), magnetic material filtration and water quality detection in water in sequence without using power equipment. Therefore, the water inlet pipe of the present invention is arranged at the top of the magnetic adsorption chamber and above the magnetic adsorption component, and a space for accommodating the filtered water is provided below the magnetic adsorption component in the magnetic adsorption chamber, thereby realizing the top-down flow of water without the need for power equipment.

[0018] Since the amount of water required for water quality testing is relatively small, the water collected by the water quality testing device of the present invention is completely sufficient.

[0019] Secondly, in the prior art, the filtration of magnetic substances is achieved by immersing the magnetic adsorption component in the water body. As the water level of the water body gradually rises, there is also a certain relative speed between the magnetic adsorption component and the water body, but the relative speed is small and will not cause the flow rate of the water body to wash away the magnetic substances adsorbed on the magnetic adsorption component. However, the present invention adopts a top-down water flow method, and the magnetic adsorption component is not immersed in the water body to remove the magnetic substances. Therefore, if a straight pipe water inlet pipe (usually a round pipe) is used, the water flow will have a greater impact on the magnetic adsorption component, and the magnetic substances adsorbed on the magnetic adsorption component will be washed into the water body to be tested at the bottom. In addition, the outlet of the straight pipe water inlet pipe has a small flow area, which cannot distribute the water well on the magnetic adsorption component below, reducing the utilization rate of the magnetic adsorption component. The present invention can slow down the water in the water inlet pipe by setting a water inlet pipe with a curved deceleration section, and the outlet end of the water inlet pipe is set horizontally, so that the water guided by the water inlet pipe is introduced into the guide member in a horizontal direction, so that the water quickly fills the guide member. Since the cross-sectional channel of the guide member is larger than the cross-sectional channel of the water inlet pipe, the water flow rate can be further reduced. After the flow rate is reduced, the water guide frame flows downward to the magnetic adsorption component to remove the magnetic material. Compared with the direct bottom opening, the guide frame set by the present invention has a blocking effect on the water and will not intercept sludge and other substances in the water that can affect the detection results, thereby reducing the initial velocity of the water moving downward. Under the premise of the same height difference, the water falling on the magnetic adsorption component has a smaller velocity, which can reduce the scouring of the adsorbed magnetic material.

[0020] In summary, the present invention does not use power equipment, and can remove suspended matter, large particle impurities and magnetic substances in sewage, while retaining sludge in sewage, so as to improve the accuracy of water quality detection results and reduce damage to the detector.

[0021] Moreover, the present invention does not use the method of immersing the magnetic adsorption component in water to remove magnetic substances, and can also reduce the damage caused by long-term immersion of the magnetic adsorption component in water. Because in order to achieve strong adsorption of magnetic substances, the magnetic adsorption component needs to use strong magnetic materials, such as iron, carbon steel, etc., and iron, carbon steel, etc. have poor corrosion resistance and rust resistance, and long-term immersion can easily lead to rust problems. Stainless steel with good corrosion resistance and rust resistance has weak magnetism and is particularly unsuitable for non-immersion methods to remove magnetic substances.

[0022] In a preferred embodiment, the water quality detection device further comprises:

[0023] The flow slowing member is arranged between the flow guide member and the magnetic adsorption component, and is used to slow down the water passing through the flow guide frame. The flow slowing member includes a flow guide grid that can pass through the water.

[0024] The flow guide grid of the present invention has relatively small pores (flow cross-section) and does not intercept sludge in the water body.

[0025] The guide grid of the present invention can further slow down the water before it falls on the magnetic adsorption component, and the deceleration effect of the guide grid is better than that of the guide frame because the flow cross-section of the guide grid is smaller and it has a better blocking effect on the water.

[0026] In a preferred embodiment, the flow slowing member further includes a fixing rod, and the flow guide grid is fixed in the magnetic adsorption chamber via the fixing rod.

[0027] In a preferred embodiment, a plurality of fixing rods are provided on the guide grid; the fixing rods are elastic rods.

[0028] In a preferred embodiment, the diversion grid is composed of alternating sloped and horizontal sections. Compared to a system consisting entirely of horizontal sections, alternating sloped and horizontal sections provide a better barrier to falling water. Water passing through the slopes partially falls onto the magnetic attraction assembly, while the remaining water enters the horizontal sections for further deceleration.

[0029] In a preferred embodiment, the flow guide grid is a three-dimensional network structure made of hard plastic or hard non-magnetic adsorption metal.

[0030] In a preferred embodiment, the magnetic adsorption assembly consists of several horizontally arranged magnetic adsorption rods, with a gap between adjacent magnetic adsorption rods; when the magnetic adsorption rods are arranged in multiple layers from top to bottom, the lower magnetic adsorption rods and the upper magnetic adsorption rods are staggered in the horizontal direction.

[0031] Compared with the existing vertically arranged magnetic adsorption rods, the horizontally arranged magnetic adsorption rods can better adsorb magnetic substances in the water body for non-immersion adsorption methods. Therefore, when the water body falls, the horizontally arranged magnetic adsorption rods have a larger contact area with the water body.

[0032] The magnetic adsorption rods arranged as above can ensure that the falling water can contact the magnetic adsorption rods, which can better remove the magnetic positions in the water. Moreover, since the water has passed through multiple levels of deceleration, the water falling on the magnetic adsorption rods has a lower speed, which will not cause the adsorbed magnetic material to fall off into the water to be tested below the magnetic adsorption rods.

[0033] In a preferred embodiment, the magnetic adsorption rod is a solid or hollow cylinder.

[0034] In a preferred embodiment, the magnetic adsorption rod includes two connecting posts; the two connecting posts are connected by an arc segment; and the arc segment has a uniform thickness.

[0035] In a preferred embodiment, the magnetic adsorption component is composed of a plurality of hollow arc-shaped bodies, with a gap between two adjacent hollow arc-shaped bodies; the hollow arc-shaped bodies include hollow spheres and / or hollow ellipsoids.

[0036] In a preferred embodiment, the water inlet pipe includes a vertical section, a horizontal section and an elbow connected in sequence;

[0037] The outlet end of the elbow is located below the horizontal section, and the outlet end of the elbow is connected to the flow guide through a joint;

[0038] The vertical section is arranged through the top of the magnetic adsorption chamber, and a trumpet-shaped guide section is arranged on the top of the vertical section.

[0039] In a preferred embodiment, the flow guide member includes a flow guide housing, a flow guide cavity is formed in the flow guide housing, and the bottom of the flow guide cavity is a flow guide frame;

[0040] A buffer is provided at one end of the flow guide shell away from the outlet end of the water inlet pipe.

[0041] In one preferred embodiment, the detection tube comprises a horizontal S-shaped tube, one end of which is connected to the magnetic adsorption chamber and the other end of which is provided with a vertical tube for inserting the detection probe. The horizontal S-shaped tube has a retarding effect, ensuring that the water entering the vertical tube is almost undisturbed, thereby improving the measurement accuracy of the detection probe.

[0042] The detection method based on the above-mentioned water quality detection device includes the following steps:

[0043] S1. The water to be tested is filtered through the water inlet pipe to intercept suspended solids and large particles of impurities;

[0044] S2, the filtered water enters the water inlet pipe and the guide piece in turn for primary and secondary retardation;

[0045] S3, the water body after slowing down flows downward to the magnetic adsorption component to remove magnetic substances;

[0046] S4, the water after the magnetic material is removed falls to the bottom of the magnetic adsorption chamber and enters the detection tube;

[0047] S5. The detection probe performs online measurement of the water body;

[0048] S6. After all the water has been filtered, the water is discharged through a drain pipe and placed in a detector for analysis and testing.

[0049] The above-mentioned water quality detection device is used in water quality analysis. The water body for water quality analysis includes sewage and filtered water samples from a water treatment station or a pilot plant.

[0050] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0051] 1. The present invention improves the structure of the water inlet pipe to effectively reduce the water flow rate at the outlet of the water inlet pipe. A flow guide is connected horizontally to the outlet end of the water inlet pipe. The cross-sectional channel of the flow guide is larger than that of the water inlet pipe, further reducing the water flow rate. The water with reduced flow rate flows downward to the magnetic adsorption assembly to remove magnetic material. The flow guide acts as a barrier to the water, further reducing the water flow rate reaching the magnetic adsorption assembly. Specifically, the present invention rationally arranges the relative positions of the water inlet pipe, flow guide, magnetic adsorption assembly, and detection tube, and achieves primary and secondary retardation of the water through the water inlet pipe and flow guide, respectively. This allows for filtration (removal of suspended matter and large impurities in wastewater), removal of magnetic material, and detection of test water samples without the use of power equipment. The filtration process of the present invention also retains sludge in the wastewater, improving the accuracy of water quality test results (retaining sludge and removing other impurities) and reducing damage to the detector.

[0052] 2. The present invention sets a horizontal S-tube at the front end of the detection tube. The horizontal S-tube has a deceleration effect, so that the water to be tested entering the vertical pipe is almost undisturbed, which can improve the measurement accuracy of the detection probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0054] Figure 1 It is a structural diagram of an existing magnetic filtration device;

[0055] Figure 2 This is a cross-sectional view of a water quality detection device according to embodiment 1 of the present invention;

[0056] Figure 3 for Figure 2 Left-hand sectional view;

[0057] Figure 4 2 is a cross-sectional view of a flow guide member according to embodiment 1 of the present invention;

[0058] Figure 5 A top view of a flow guide member according to embodiment 1 of the present invention;

[0059] Figure 6 This is a cross-sectional view of a water quality detection device according to embodiment 3 of the present invention;

[0060] Figure 7 This is a structural diagram of the magnetic adsorption rod according to Example 3 of the present invention;

[0061] Figure 8 This is a cross-sectional view of a water quality detection device according to embodiment 4 of the present invention;

[0062] Figure 9 This is a top view of the detection tube according to Example 1 of the present invention.

[0063] Markings and corresponding parts names in the accompanying drawings:

[0064] 1-magnetic adsorption chamber; 2-top cover; 3-water inlet pipe; 4-connector; 5-flow guide; 6-flow slowing part; 7-magnetic adsorption assembly; 8-magnetic adsorption block; 9-detection tube; 10-detection probe; 11-drain pipe; 31-flow guide section; 32-vertical section; 33-horizontal section; 34-elbow; 51-flow guide shell; 52-flow guide cavity; 53-flow guide frame; 54-buffer; 61-fixing rod; 62-flow guide grid; 71-magnetic adsorption rod; 72-hollow arc surface; 73-vertical connecting rod; 91-horizontal S-tube; 92-vertical pipe; 541-end cover; 542-guide plate; 543-buffer block; 711-connecting column; 712-arc section. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with the examples. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention. The embodiments described below are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0066] In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that these specific details are not necessarily required to practice the present invention. In other examples, well-known structures, materials, or methods are not specifically described to avoid obscuring the present invention. The materials, instruments, and reagents used in the following examples, unless otherwise specified, are commercially available. The techniques used in the examples, unless otherwise specified, are conventional techniques well known to those skilled in the art.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0068] Example 1:

[0069] In order to improve the accuracy of water quality detection and reduce the damage of impurities in the water to the detector, this embodiment provides a water quality detection device, the structure of which is as follows: Figure 2-Figure 5 Shown, including:

[0070] A magnetic adsorption chamber 1 is provided with a magnetic adsorption component 7, which is used to adsorb magnetic substances in the water body. A drain pipe 11 is provided at the bottom of the magnetic adsorption chamber 1; the magnetic adsorption component 7 is made of a strong magnetic material that can adsorb magnetic substances in the water body, and can be iron or carbon steel, preferably carbon steel, which has strong magnetism and good corrosion resistance.

[0071] In this embodiment, the magnetic adsorption assembly 7 is composed of a plurality of horizontally arranged magnetic adsorption rods 71, with a gap between adjacent magnetic adsorption rods 71. When the magnetic adsorption rods 71 are arranged in multiple layers from top to bottom, the lower magnetic adsorption rods 71 are horizontally staggered with the upper magnetic adsorption rods 71, that is, the lower magnetic adsorption rods 71 are located in the gap between the two magnetic adsorption rods 71. This ensures that all falling water contacts the magnetic adsorption rods 71, thereby improving the adsorption effect. Specifically, the two ends of the magnetic adsorption rods 71 are connected to the inner wall of the magnetic adsorption chamber 1. Specifically, the magnetic adsorption rods 71 are solid or hollow cylinders with a smooth curved outer wall that does not cause sludge in the water to be trapped.

[0072] The water inlet pipe 3 is arranged at the top of the magnetic adsorption chamber 1. A filter screen is provided in the water inlet pipe 3 for intercepting suspended matter and large particles of impurities. The filter screen does not intercept sludge in the water body. Similarly, due to the small particle size of the magnetic substance, it cannot be intercepted by the filter screen. The water inlet pipe 3 is used to filter the water body to be tested and then introduce it into the magnetic adsorption chamber 1. The water inlet pipe 3 has a curved deceleration section, and the outlet end of the water inlet pipe 3 is horizontally arranged. The magnetic adsorption chamber 1 can be set as a closed end, and the water inlet pipe 3 is directly installed on the top of the magnetic adsorption chamber 1. In a preferred case, the top of the magnetic adsorption chamber 1 is an open end, and the open end is detachably connected to the top cover 2. The water inlet pipe 3 is fixed on the top cover 2. When the top cover 2 is removed, it is convenient to clean the inside of the magnetic adsorption chamber 1. The detachable connection can be specifically a plug-in connection, a bolt connection, etc.

[0073] This embodiment improves the structure of the water inlet pipe to reduce the flow rate of the filtered water body, which is achieved by setting a bend deceleration section. The bend deceleration section can be any non-straight pipe section that can achieve deceleration. In a specific case, the water inlet pipe 3 includes a vertical section 32, a horizontal section 33 and an elbow 34 connected in sequence; the outlet end of the elbow 34 is located below the horizontal section 33, and the outlet end of the elbow 34 is connected to the guide member 5 through a joint 4; the vertical section 32 is passed through the top of the magnetic adsorption chamber 1. Preferably, a trumpet-shaped guide section 31 is provided at the top of the vertical section 32, and the filter can be directly set in the vertical section 32. The setting of the guide section 31 is conducive to guiding the water body to be tested into the water inlet pipe 3.

[0074] The guide member 5 is connected to the outlet end of the water inlet pipe 3 and is arranged above the magnetic adsorption assembly 7. The cross-sectional channel of the guide member 5 is larger than the cross-sectional channel of the water inlet pipe 3, and a guide frame 53 for passing through the water body is provided at the bottom of the guide member 5. The difference in the cross-sectional channel between the guide member 5 and the water inlet pipe 3 can be used to slow down the water body entering the guide member 5. The bottom outlet end of the guide member 5 is not a conventional through groove or through hole, but a guide frame 53 that has a blocking effect on the water body is provided at the bottom outlet end of the guide member 5. The guide frame 53 has a blocking effect on the water body, but does not intercept useful sludge in the water body, further reducing the speed at which the water body falls on the magnetic adsorption assembly 7, further reducing the risk of the magnetic material adsorbed on the magnetic adsorption assembly 7 being washed away. The guide frame 53 can be a plate frame connected by a plurality of ribs connected in a crisscross manner.

[0075] In a specific example, the guide member 5 is disposed below the horizontal section 33 of the water inlet pipe 3. The inlet end of the guide member 5 is disposed horizontally and connected to the outlet end of the horizontal section 33 via a joint 4 and an elbow 34. After being decelerated by the horizontal section 33, the water in the water inlet pipe 3 enters the guide member 5 through the elbow 34 for further deceleration. In other words, in this embodiment, the designed guide member 5 and water inlet pipe 3 achieve a secondary deceleration of the water. Preferably, to ensure that the horizontal section 33 is as long as possible, the vertical section 32 is disposed at the center of the magnetic adsorption chamber 1 or at the end away from the elbow 34.

[0076] In a specific example, the flow guide 5 includes a flow guide shell 51, a flow guide cavity 52 is formed in the flow guide shell 51, and the bottom of the flow guide cavity 52 is a flow guide frame 53; one horizontal end of the flow guide shell 51 is set as the inlet end, which is connected to one end of the elbow 34 through the joint 4. The overall shape of the flow guide 5 matches the shape of the magnetic adsorption chamber 1. For example, when the magnetic adsorption chamber 1 is a cylindrical structure, the flow guide 5 is circular with the flow guide cavity 52 formed therein; when the magnetic adsorption chamber 1 is square, the flow guide 5 is square with the flow guide cavity 52 formed therein. This ensures that the flow guide cavity 52 in the flow guide 5 has a larger flow area, thereby improving the deceleration effect.

[0077] In a specific case, a buffer 54 is provided at one end of the diversion housing 51 away from the outlet end of the water inlet pipe 3. When the water entering the diversion cavity 52 continues to move forward in the horizontal direction under the action of inertia, the buffer 54 has a buffering and decelerating effect on the water, reducing the flow velocity of the water in the diversion cavity 52 or avoiding turbulence. Specifically, Figure 4As shown, the buffer member 54 includes an end cover 541, and two guide plates 542 are symmetrically provided at one end of the end cover 541. The two guide plates 542 are respectively provided at the upper end and the lower end of the end of the deflector shell 51 away from the elbow 34, and the guide plates 542 are connected to the deflector shell 51 by bolts. A buffer block 543 is provided between the two guide plates 542 at one end of the end cover 541. The buffer block 543 can be inserted into the deflector shell 51, and the buffer block 543 is sealed to the inner wall of the deflector shell 51. The sealing connection can be achieved by using the elasticity of the buffer block 543 through close contact, or by providing a sealing ring.

[0078] The detection tube 9 is connected to the space below the magnetic adsorption component 7 in the magnetic adsorption chamber 1. In a specific implementation, multiple detection tubes 9 can be provided according to specific detection items, each detection tube 9 corresponding to a detection item. The detection tube 9 has the same liquid level as the magnetic adsorption chamber 1.

[0079] In a preferred case, Figure 9 As shown, the detection tube 9 includes a horizontal S-shaped tube 91, one end of which is connected to the magnetic adsorption chamber 1, and the other end is provided with a vertical tube 92 for inserting the detection probe 10. The liquid level in the horizontal S-shaped tube 91 is kept at a constant height, and the S-shaped bend of the horizontal S-shaped tube 91 is used to stabilize the flow of water entering the vertical tube 92. This prevents fluctuations in the water entering the detection tube 9 from affecting the detection results.

[0080] The water quality detection unit includes a detector and a detection probe 10 that can be inserted into the detection tube 9; wherein the detection probe 10 is a probe for an instrument that can realize online detection, such as: a pH meter, a TDS measuring pen, a turbidity meter, etc.; the detector is a precision instrument that needs to perform precise analysis of samples, such as: a TOC instrument for COD detection, etc.

[0081] In a preferred case, a magnetic adsorption block 8 is provided on the side wall below the magnetic adsorption component 7 in the magnetic adsorption chamber 1, and the magnetic adsorption block 8 is used to perform secondary magnetic adsorption on the water body after magnetic adsorption filtration by the magnetic adsorption component 7.

[0082] The working principle of this embodiment is:

[0083] The water to be tested enters the vertical section 32 of the water inlet pipe 3 and passes through the filter to intercept suspended matter and large particles of impurities, and then enters the horizontal section 33 and the guide member 5 in turn for secondary deceleration, and then flows downward through the guide frame 53 into the magnetic adsorption component 7. The magnetic substance is adsorbed by the magnetic adsorption component 7. The water after removing the magnetic substance enters the bottom of the magnetic adsorption component 7 and enters the detection tube 9. The pH value, TDS and turbidity are measured online through the detection probe 10. When all the water is filtered and enters the magnetic adsorption component 7, samples are taken through the drain pipe 11, and the samples are placed in the TOC instrument for COD and other analysis and detection.

[0084] The water quality detection device of this embodiment is designed based on the requirements of water quality detection. The requirements for water quality detection are that the water sample is relatively low, and it is necessary to remove suspended matter, large particle impurities and magnetic substances in the water body while retaining useful sludge and other substances in the water body to ensure the accuracy of the detection and reduce the impact of magnetic substances on the detection probe 10 and the detector.

[0085] The water body for the water quality analysis in this embodiment includes sewage and filtered water samples from a water treatment station or a pilot plant.

[0086] Example 2:

[0087] This embodiment is based on the first embodiment, and differs from the first embodiment in that the water quality detection device further includes:

[0088] The flow slowing member 6 is arranged between the guide member 5 and the magnetic adsorption component 7, and is used to slow down the water passing through the guide frame 53. The flow slowing member 6 includes a guide grid 62 that can pass through the water but not intercept useful sludge in the water. In a specific case, the guide grid 62 is a three-dimensional network structure made of hard plastic or hard non-magnetic adsorption metal; the three-dimensional network structure can be made by 3D printing, and the pores of the three-dimensional network structure can pass through the water but not intercept useful sludge in the water.

[0089] The guide grid 62 of this embodiment is made of hard material to meet the rigidity requirements of the guide grid 62 so that it will not deform under the action of water flow. The three-dimensional network structure has a complex porosity, which can pass through the water body without intercepting useful sludge in the water body, and has a significant retarding effect on the water body.

[0090] The flow guide grid 62 can be directly fixed to the inner wall of the magnetic adsorption chamber 1, or can be fixed by other fixing components.

[0091] In a specific example, the flow-slowing member 6 further includes a fixing rod 61, through which the flow-guiding grid 62 is fixed within the magnetic adsorption chamber 1. Preferably, the flow-guiding grid 62 is provided with a plurality of fixing rods 61; the fixing rods 61 are elastic rods; the elastic rods facilitate the detachable installation of the flow-guiding grid 62 within the magnetic adsorption chamber 1, and the fixing rods 61 can be snapped into place within the magnetic adsorption chamber 1 by utilizing the slight elasticity of the elastic rods. The elastic rods include a plurality of fixing cross bars, with adjacent fixing cross bars connected by springs, and the flow-guiding grid 62 is fixed to the fixing cross bars.

[0092] In a preferred embodiment, the diversion grid 62 is composed of alternating inclined and horizontal sections. More specifically, the inclined sections are shaped like an "eight," with a fixed rod 61 positioned at the top. A portion of the water blocked by the inclined sections falls directly onto the magnetic adsorption assembly 7, while the remaining portion enters the horizontal sections for secondary deceleration. A diversion grid 62 composed of both inclined and horizontal sections offers a superior deceleration effect compared to a grid composed entirely of horizontal sections.

[0093] Example 3:

[0094] This embodiment is based on embodiment 1 or embodiment 2. Figure 6-Figure 7 As shown, the magnetic adsorption rod 71 includes two connecting columns 711; the two connecting columns 711 are connected by an arc segment 712; the arc segment 712 has a uniform thickness, the connecting column 711 and the arc segment 712 have the same central axis and inner diameter, and the top of the connecting column 711 and the arc segment 712 are on the same horizontal plane. Preferably, the arc segment 712 is a semicircular arc segment with uniform thickness. The setting of the arc segment 712 does not affect the adsorption area of the magnetic adsorption rod 71 and can reduce the weight of the magnetic adsorption rod 71.

[0095] Example 4:

[0096] This embodiment is based on embodiment 1 or embodiment 2. Figure 8 As shown, the magnetic adsorption component 7 is composed of a plurality of hollow arc-surface bodies 72, and there is a gap between two adjacent hollow arc-surface bodies 72; the hollow arc-surface bodies 72 include hollow spheres and / or hollow ellipsoids.

[0097] In a specific case, a flow-reducing member 6 is arranged above the magnetic adsorption component 7, and the flow-reducing member 6 includes a fixed rod 61 and a guide grid 62; the guide grid 62 is composed of a three-dimensional network structure composed of alternating inclined sections and horizontal sections, and the inclined section is in the shape of an "eight", and a fixed rod 61 is arranged at the top of the "eight", and a plurality of hollow ellipsoids are connected to the fixed rod 61 through a vertical connecting rod 73. A fixed rod 61 is also arranged in the middle of the horizontal section, and the fixed rod is also connected to a plurality of hollow ellipsoids through a vertical connecting rod. The heights of the hollow ellipsoids connected to the fixed rod 61 on the horizontal section and the inclined section are inconsistent.

[0098] Example 5:

[0099] The water quality detection method based on the water quality detection device described in any one of Examples 1 to 4 above includes the following steps:

[0100] S1, the water to be tested passes through the water inlet pipe 3 to filter out suspended solids and large particles of impurities;

[0101] S2, the filtered water enters the water inlet pipe 3 and the guide member 5 in sequence for primary and secondary deceleration;

[0102] S3, the water body after slowing down flows downward to the magnetic adsorption component 7 to remove the magnetic material;

[0103] S4, the water after the magnetic material is removed falls to the bottom of the magnetic adsorption chamber 1 and enters the detection tube 9;

[0104] S5, the detection probe 10 performs online measurement on the water body;

[0105] S6. After all the water has been filtered, the water is drained out through the drain pipe 11 and placed in a detector for analysis and testing.

[0106] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0107] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

Claims

1. A water quality detection device, characterized in that: include: A magnetic adsorption chamber (1) is provided with a magnetic adsorption assembly (7) therein, the magnetic adsorption assembly (7) being used to adsorb magnetic substances in a water body, and a drain pipe (11) being provided at the bottom of the magnetic adsorption chamber (1); the magnetic adsorption assembly (7) is composed of a plurality of horizontally arranged magnetic adsorption rods (71), with a gap between two adjacent magnetic adsorption rods (71), and the magnetic adsorption rods (71) will not intercept sludge in the water body; the magnetic adsorption assembly (7) uses a non-immersion adsorption method to adsorb magnetic substances; A water inlet pipe (3) is arranged at the top of the magnetic adsorption chamber (1) and is used to filter the water to be tested and then introduce it into the magnetic adsorption chamber (1); the water inlet pipe (3) has a curved deceleration section, and the outlet end of the water inlet pipe (3) is arranged horizontally; A flow guide (5) is connected to the outlet end of the water inlet pipe (3), the flow guide (5) is arranged above the magnetic adsorption component (7), the cross-sectional channel of the flow guide (5) is larger than the cross-sectional channel of the water inlet pipe (3), and a flow guide frame (53) for passing through the water body is arranged at the bottom of the flow guide (5); The guide frame (53) has a blocking effect on the water body and does not intercept substances in the water body that can affect the detection results. The guide frame (53) reduces the initial velocity of the water body moving downward; A detection tube (9) is communicated with the space below the magnetic adsorption component (7) in the magnetic adsorption chamber (1); A water quality detection unit, comprising a detector and a detection probe (10) capable of being inserted into the detection tube (9); A flow-decelerating member (6) is provided between the flow-guiding member (5) and the magnetic adsorption assembly (7) and is used to decelerate the water passing through the flow-guiding frame (53); the flow-decelerating member (6) comprises a flow-guiding grid (62) capable of passing through the water; the flow-guiding grid (62) will not intercept sludge in the water; The flow slowing member (6) further comprises a fixing rod (61), and the flow guide grid (62) is fixed in the magnetic adsorption chamber (1) via the fixing rod (61); The fixing rod (61) is an elastic rod.

2. A water quality detection device according to claim 1, characterized in that: A plurality of fixing rods (61) are provided on the guide grid (62).

3. A water quality detection device according to claim 1, characterized in that: The flow guide grid (62) is composed of inclined sections and horizontal sections that are alternately arranged.

4. A water quality detection device according to claim 1, characterized in that: The flow guide grid (62) is a three-dimensional network structure made of hard plastic.

5. A water quality detection device according to claim 1, characterized in that: The flow guide grid (62) is a three-dimensional network structure made of hard non-magnetic adsorption metal.

6. A water quality detection device according to claim 1, characterized in that: When the magnetic adsorption rods (71) are arranged in multiple layers from top to bottom, the magnetic adsorption rods (71) in the lower layer and the magnetic adsorption rods (71) in the upper layer are arranged alternately in the horizontal direction.

7. A water quality detection device according to claim 1, characterized in that: The magnetic adsorption rod (71) is a solid or hollow cylinder.

8. A water quality detection device according to claim 1, characterized in that: The magnetic adsorption rod (71) comprises two connecting columns (711); the two connecting columns (711) are connected via an arc segment (712); and the arc segment (712) has a uniform thickness.

9. A water quality detection device according to claim 1, characterized in that: The magnetic adsorption component (7) is composed of a plurality of hollow arc-surface bodies (72), with a gap between two adjacent hollow arc-surface bodies (72); the hollow arc-surface bodies (72) include hollow spheres and / or hollow ellipsoids.

10. A water quality detection device according to claim 1, characterized in that: The water inlet pipe (3) comprises a vertical section (32), a horizontal section (33) and an elbow (34) connected in sequence; The outlet end of the elbow (34) is located below the horizontal section (33), and the outlet end of the elbow (34) is connected to the flow guide (5) via a joint (4); The vertical section (32) is arranged through the top of the magnetic adsorption chamber (1), and a trumpet-shaped flow guide section (31) is provided on the top of the vertical section (32).

11. A water quality detection device according to claim 1, characterized in that: The flow guide member (5) comprises a flow guide housing (51), a flow guide cavity (52) is formed in the flow guide housing (51), and the bottom of the flow guide cavity (52) is a flow guide frame (53); A buffer member (54) is provided at one end of the flow guide housing (51) away from the outlet end of the water inlet pipe (3).

12. A water quality detection device according to claim 1, characterized in that: The detection tube (9) comprises a horizontal S-shaped tube (91), one end of which is connected to the magnetic adsorption chamber (1), and the other end of which is provided with a vertical tube (92) for inserting the detection probe (10).

13. A detection method based on the water quality detection device according to any one of claims 1 to 12, characterized in that: The following steps are involved: S1, the water to be tested passes through the water inlet pipe (3) to filter and intercept suspended matter and large particles of impurities; S2, the filtered water enters the water inlet pipe (3) and the flow guide (5) in sequence and undergoes primary deceleration and secondary deceleration; S3, the water body after slowing down flows downward to the magnetic adsorption component (7) to remove magnetic substances; S4, the water body after the magnetic material is removed falls to the bottom of the magnetic adsorption chamber (1) and enters the detection tube (9); S5, the detection probe (10) performs online measurement on the water body; S6. After all the water has been filtered, the water is discharged through the drainage pipe (11) and placed in the detector for analysis and detection.

14. Use of the water quality detection device according to any one of claims 1 to 12 in water quality analysis, characterized in that: The water bodies for the water quality analysis include sewage and filtered water samples from water treatment stations or pilot bases.

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