Water quality detection device, detection method and application

Abstract

The invention relates to the technical field of water quality detection, and particularly discloses a water quality detection device and detection method and application, the water quality detection device comprises a magnetic adsorption chamber in which a magnetic adsorption assembly is arranged, and the bottom of the magnetic adsorption chamber is provided with a drainage pipe; the water inlet pipe is used for filtering the to-be-detected water body and then guiding the filtered to-be-detected water body into the magnetic adsorption chamber, the water inlet pipe is provided with a curve retarding section, and the outlet end of the water inlet pipe is horizontally arranged; the flow guide part is connected with the outlet end of the water inlet pipe and arranged above the magnetic adsorption assembly, a section channel of the flow guide part is larger than that of the water inlet pipe, and a flow guide frame allowing water to pass through is arranged at the bottom of the flow guide part; the detection pipe is communicated with the space below the magnetic adsorption assembly in the magnetic adsorption chamber; and a water quality detection unit. Power equipment is adopted, suspended solids, large-particle impurities and magnetic substances in sewage can be removed, sludge in the sewage can be reserved, the accuracy of a water quality detection result is improved, and damage to a detector can be reduced.

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, detection method and application. Background Art

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

[0003] The objects of water quality testing mainly include drinking water and sewage. Among them, sewage contains interfering substances such as suspended matter, large particle impurities and magnetic impurities. These interfering substances will not only affect the accuracy of the test results, but also affect the performance and life of the test equipment, especially such precision instruments as TOC meters used to detect COD.

[0004] Therefore, for sewage testing, the water needs to be filtered before testing to remove interfering substances.

[0005] In the prior art, the filtration treatment of sewage mainly uses a filter to remove suspended matter and large particles of impurities, and then uses a magnetic bar to absorb magnetic substances. The purpose of the filtration treatment of the prior art is to purify water quality and the treatment volume 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 the water inlet pipe. The magnetic adsorption chamber is provided with a number of vertically arranged magnetic adsorption rods. When the water enters the magnetic adsorption chamber, the magnetic adsorption rods are immersed in the water to achieve the adsorption of magnetic substances in the water. The filtered water is discharged through the upper drainage pipe of the magnetic adsorption chamber. The existing magnetic filtration device adopts a bottom-in and top-out structure to facilitate the magnetic rods to be immersed in the water. Although the magnetic adsorption effect is good, it uses power equipment.

[0006] The above-mentioned filtering device is not suitable for water quality testing, because the filtration of water quality testing is to obtain the water sample to be tested, and the amount of water treated is relatively small. The use of power equipment will lead to unnecessary costs. The filtration of water quality testing is different from the filtration of water purification in that: the filtration of water purification needs to remove impurities in the water as much as possible, while the filtration of water quality testing only needs to remove suspended matter, large particles and magnetic substances, and needs to retain 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 sewage before treatment by the filtration equipment and the water quality of the water after treatment 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: A water quality detection device, comprising: A magnetic adsorption chamber is provided with a magnetic adsorption component therein, the magnetic adsorption component is used to adsorb magnetic substances in the water body, and a drainage pipe is provided at the bottom of the magnetic adsorption chamber; The water inlet pipe is arranged at the top of the magnetic adsorption chamber, and is used to filter the water body 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; 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, and a flow guide frame passing through the water body is arranged at the bottom of the flow guide; The detection tube is connected to the space below the magnetic adsorption component in the magnetic adsorption chamber; The water quality detection unit comprises a detection instrument and a detection probe which can be inserted into a detection tube.

[0010] The present invention sets a detection tube connected to the magnetic adsorption chamber, filters and removes water from suspended matter, large particle impurities and magnetic substances into the detection tube, and directly inserts an 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, etc.

[0011] First of all, the overall technical concept of the present invention is: to achieve impurity (suspended matter, large particle impurities) interception, 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 filtered water is arranged below the magnetic adsorption component in the magnetic adsorption chamber, thereby achieving water flow from top to bottom without the need for power equipment.

[0012] 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.

[0013] Secondly, the prior art realizes the filtration of magnetic substances by immersing the magnetic adsorption component in the water body. As the water level of the water body gradually rises, there is a certain relative speed between the magnetic adsorption component and the water body, but the relative speed is small, which 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 the 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 from the 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 velocity can be further reduced. The water guide frame after the flow velocity is reduced flows downward to the magnetic adsorption component to remove the magnetic substance. 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 the sludge in the water that can affect the detection result, 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 substance.

[0014] In summary, the present invention does not use power equipment, and 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.

[0015] Furthermore, the present invention does not remove magnetic substances by immersing the magnetic adsorption component in water, and can also reduce damage caused by long-term immersion of the magnetic adsorption component in water. This is 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 removing magnetic substances by non-immersion methods.

[0016] In a preferred embodiment, the water quality detection device further comprises: The flow decelerator is arranged between the flow guide member and the magnetic adsorption assembly, and is used to decelerate the water passing through the flow guide frame. The flow decelerator includes a flow guide grid frame that can pass through the water body.

[0017] The flow guide grid of the present invention has small pores (flow cross section) and will not retain sludge in the water body.

[0018] 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 has a better blocking effect on the water.

[0019] 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.

[0020] In a preferred embodiment, a plurality of fixing rods are provided on the guide grid; the fixing rods are elastic rods.

[0021] In a preferred embodiment, the guide grid is composed of alternately arranged inclined sections and horizontal sections. Compared with all horizontal sections, the alternately arranged inclined sections and horizontal sections have a better blocking effect on falling water. Part of the water passing through the inclined section falls onto the magnetic adsorption component, and the other part can enter the horizontal section to slow down again.

[0022] In a preferred embodiment, the flow guide grid is a three-dimensional network structure made of hard plastic or hard non-magnetic adsorption metal.

[0023] In a preferred embodiment, the magnetic adsorption assembly is composed of a plurality of horizontally arranged magnetic adsorption rods, with a gap between two adjacent magnetic adsorption rods; when the magnetic adsorption rods are arranged in multiple layers from top to bottom, the lower magnetic adsorption rods are staggered with the upper magnetic adsorption rods in the horizontal direction.

[0024] 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 the non-immersion adsorption method. Therefore, when the water body falls, the horizontally arranged magnetic adsorption rods have a larger contact area with the water body.

[0025] Moreover, 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 stages of deceleration, the water falling on the magnetic adsorption rods has a lower speed, which will not cause the adsorbed magnetic substances to fall off into the water to be tested below the magnetic adsorption rods.

[0026] In a preferred embodiment, the magnetic adsorption rod is a solid or hollow cylinder.

[0027] 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.

[0028] In a preferred embodiment, the magnetic adsorption component is composed of a plurality of hollow arc-shaped bodies, and there is a gap between two adjacent hollow arc-shaped bodies; the hollow arc-shaped bodies include hollow spheres and / or hollow ellipsoids.

[0029] In a preferred embodiment, the water inlet pipe includes a vertical section, a horizontal section and an elbow connected in sequence; 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 member through a joint; The vertical section is arranged through the top of the magnetic adsorption chamber, and a horn-shaped flow guide section is arranged on the top of the vertical section.

[0030] 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; A buffer is arranged at one end of the flow guide shell away from the outlet end of the water inlet pipe.

[0031] In a preferred embodiment, the detection tube includes a horizontal S-tube, one end of which is connected to the magnetic adsorption chamber, and the other end is provided with a vertical tube for inserting the detection probe. The horizontal S-tube has a deceleration effect, so that the water to be tested entering the vertical tube is almost undisturbed, which can improve the accuracy of the detection probe measurement.

[0032] The detection method based on the above water quality detection device includes the following steps: S1. The water to be tested is filtered through the water inlet pipe to intercept suspended matter and large particles of impurities; S2, the filtered water enters the water inlet pipe and the guide piece in turn for primary and secondary retardation; S3, the water body after slowing down flows downward to the magnetic adsorption component to remove magnetic substances; S4, the water body after the magnetic material is removed falls to the bottom of the magnetic adsorption chamber and enters the detection tube; S5, the detection probe performs online measurement of the water body; 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.

[0033] The water quality detection device is used in water quality analysis, and the water body for water quality analysis includes sewage and filtered water samples from a water treatment station or a pilot plant.

[0034] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The present invention can effectively reduce the water flow rate at the outlet of the water inlet pipe by improving the structure of the water inlet pipe, and horizontally connect the guide piece at the outlet end of the water inlet pipe, and use the cross-sectional channel of the guide piece to be larger than the cross-sectional channel of the water inlet pipe, which can further reduce the water flow rate. After the flow rate is reduced, the water guide frame flows downward to the magnetic adsorption component to remove the magnetic substance, wherein the guide frame has a blocking effect on the water body, further reducing the water flow rate reaching the magnetic adsorption component, that is, the present invention reasonably arranges the relative position relationship of the water inlet pipe, the guide piece, the magnetic adsorption component and the detection tube, and realizes the first-level and second-level deceleration of the water body through the water inlet pipe and the guide piece, respectively, and can realize the filtration of the test water sample (removing suspended matter and large particle impurities in sewage), removing magnetic substances and detection; and no power equipment is used. The filtration treatment of the present invention can also retain the sludge in the sewage, realize the improvement of the accuracy of the water quality detection results (retaining the sludge in the sewage and removing other impurities), and can reduce the damage to the detector.

[0035] 2. The present invention arranges 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 tube is almost undisturbed, which can improve the measurement accuracy of the detection probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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: Figure 1 It is a structural schematic diagram of an existing magnetic filtration device; Figure 2 It is a cross-sectional view of a water quality detection device according to embodiment 1 of the present invention; Figure 3 for Figure 2 Left-hand section view; Figure 4 is a cross-sectional view of a flow guide member according to embodiment 1 of the present invention; Figure 5 It is a top view of the flow guide member of Example 1 of the present invention; Figure 6 It is a cross-sectional view of a water quality detection device according to Embodiment 3 of the present invention; Figure 7 This is a schematic diagram of the structure of the magnetic adsorption rod according to Example 3 of the present invention; Figure 8 It is a cross-sectional view of a water quality detection device according to embodiment 4 of the present invention; Fig. 9 This is a top view of the detection tube of Example 1 of the present invention.

[0037] Marks and corresponding parts names in the attached drawings: 1-magnetic adsorption chamber; 2-top cover; 3-water inlet pipe; 4-connector; 5-flow guide; 6-flow slowing member; 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 tube; 541-end cover; 542-guide plate; 543-buffer block; 711-connecting column; 712-arc section. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments. The schematic implementation mode of the present invention and its 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, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0039] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those of ordinary skill in the art that these specific details do not have to be employed to practice the present invention. In other embodiments, in order to avoid confusing the present invention, known structures, materials or methods are not specifically described. The materials, instruments and reagents used in the following examples, unless otherwise specified, can be obtained from commercial sources. The technical means used in the examples, unless otherwise specified, are conventional means well known to those skilled in the art.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] Embodiment 1: 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 As shown, including: 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 the advantages of strong magnetism and good corrosion resistance.

[0042] In this embodiment, the magnetic adsorption assembly 7 is composed of a plurality of horizontally arranged magnetic adsorption rods 71, and there is a gap between two 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 ​​and the upper magnetic adsorption rods 71 ​​are arranged alternately in the horizontal direction, that is, the lower magnetic adsorption rods 71 ​​are located in the gap between the two magnetic adsorption rods 71, so that all falling water bodies are in contact with the magnetic adsorption rods 71 ​​to improve 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 rod 71 is a solid or hollow cylinder, and the outer wall of the cylinder is a smooth curved surface, which will not cause the sludge in the water body to be trapped.

[0043] The water inlet pipe 3 is arranged at the top of the magnetic adsorption chamber 1. A filter screen for intercepting suspended matter and large particles of impurities is arranged in the water inlet pipe 3. 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 arranged horizontally. 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 a 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.

[0044] 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.

[0045] The guide member 5 is connected to the outlet end of the water inlet pipe 3. The guide member 5 is arranged above the magnetic adsorption component 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 arranged 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, and the bottom outlet end of the guide member 5 is not a conventional through groove or through hole, but a guide frame 53 having a blocking effect on the water body is arranged at the bottom outlet end of the guide member 5. The guide frame 53 has a blocking effect on the water body, but will not intercept useful sludge in the water body, further reducing the speed of the water body falling on the magnetic adsorption component 7, and further reducing the risk of the magnetic material adsorbed on the magnetic adsorption component 7 being washed off. The guide frame 53 can be a plate frame connected by a number of ribs connected in a criss-cross manner.

[0046] In a specific case, the guide member 5 is arranged below the horizontal section 33 of the water inlet pipe 3, the inlet end of the guide member 5 is arranged horizontally, and the inlet end of the guide member 5 is connected to the outlet end of the horizontal section 33 through the joint 4 through the elbow 34; the water in the water inlet pipe 3 is slowed down by the horizontal section 33 and then enters the guide member 5 through the elbow 34 for further slowing down; that is, in this embodiment, the designed guide member 5 and the water inlet pipe 3 realize the secondary slowing down of the water. Preferably, in order to have a longer horizontal section 33 as much as possible, the vertical section 32 is arranged at the center of the magnetic adsorption chamber 1 or at one end away from the elbow 34.

[0047] In a specific case, 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 end of the flow guide shell 51 in the horizontal direction is set as the inlet end, and 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 a circle with a flow guide cavity 52 formed inside; when the magnetic adsorption chamber 1 is a square, the flow guide 5 is a square with a flow guide cavity 52 formed inside, which can ensure that the flow guide cavity 52 in the flow guide 5 has a larger flow area and improve the deceleration effect.

[0048] In a specific case, a buffer 54 is provided at one end of the guide housing 51 away from the outlet end of the water inlet pipe 3. When the water entering the guide 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, thereby reducing the flow velocity of the water in the guide cavity 52 or avoiding the phenomenon of turbulence. Specifically, Figure 4As shown, the buffer member 54 includes an end cover 541, and two guide plates 542 are symmetrically arranged at one end of the end cover 541. The two guide plates 542 are respectively arranged 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 arranged 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 setting a sealing ring.

[0049] The detection tube 9 is connected to the space below the magnetic adsorption component 7 in the magnetic adsorption chamber 1. In the specific implementation, multiple detection tubes 9 can be set according to specific detection items, and each detection tube 9 corresponds to a detection item. The detection tube 9 has the same liquid level height as the magnetic adsorption chamber 1.

[0050] In a preferred case, if Fig. 9 As shown, the detection tube 9 includes a horizontal S-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 levels in the horizontal S-tube 91 have the same height, and the S-bend of the horizontal S-tube 91 is used to stabilize the flow of water entering the vertical tube 92. This avoids the influence of fluctuations in the water entering the detection tube 9 on the detection results.

[0051] 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 of 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 on the sample, such as: a TOC instrument for COD detection, etc.

[0052] 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.

[0053] The working principle of this embodiment is: The water to be tested enters the vertical section 32 of the water inlet pipe 3, and is filtered to retain suspended matter and large particles. It then enters the horizontal section 33 and the guide member 5 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. After the magnetic substance is removed, the water enters the bottom of the magnetic adsorption component 7 and enters the detection tube 9. The pH value, TDS, turbidity and other online clearances are achieved 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 a TOC instrument for COD and other analysis and detection.

[0054] 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.

[0055] The water body for the water quality analysis in this embodiment includes sewage from a water treatment station or a pilot plant and filtered water samples.

[0056] Embodiment 2: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that: the water quality detection device further includes: 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 frame 62 that can pass through the water but not retain useful sludge in the water. In a specific case, the guide frame 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 retain useful sludge in the water.

[0057] 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 intricate 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.

[0058] 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.

[0059] In a specific case, the flow slowing member 6 also includes a fixing rod 61, and the flow guide grid 62 is fixed in the magnetic adsorption chamber 1 through the fixing rod 61. Preferably, a plurality of fixing rods 61 are provided on the flow guide grid 62; the fixing rods 61 are elastic rods; the elastic rods facilitate the detachable installation of the flow guide grid 62 in the magnetic adsorption chamber 1, and the fixing rods 61 can be clamped in the magnetic adsorption chamber 1 by utilizing the micro-elasticity of the elastic rods, and the elastic rods include a plurality of fixing cross bars, and two adjacent fixing cross bars are connected by springs, and the flow guide grid 62 is fixed on the fixing cross bars.

[0060] In a preferred case, the diversion grid 62 is composed of inclined sections and horizontal sections arranged alternately. More specifically, the inclined section is in an "eight" shape, and a fixing rod 61 is arranged at the top of the "eight" shape. A part of the water body blocked by the inclined section directly falls to the magnetic adsorption component 7, and the other part can enter the horizontal section for secondary deceleration. The diversion grid 62 composed of inclined sections and horizontal sections has a better deceleration effect than all horizontal sections.

[0061] Embodiment 3: 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 is on the same horizontal plane as the arc segment 712. 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.

[0062] Embodiment 4: 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.

[0063] In a specific case, a flow-slowing member 6 is arranged above the magnetic adsorption component 7, and the flow-slowing member 6 includes a fixed rod 61 and a guide grid 62; the guide grid 62 is composed of a three-dimensional network structure consisting of alternating inclined sections and horizontal sections, and the inclined section is in an "eight" shape, and a fixed rod 61 is arranged at the top of the "eight" shape, and a plurality of hollow ellipsoids are connected to the fixed rod 61 through a vertical connecting rod 73, and 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, and the heights of the hollow ellipsoids connected to the fixed rod 61 on the horizontal section and the inclined section are inconsistent.

[0064] Embodiment 5: The water quality detection method based on the water quality detection device described in any one of the above embodiments 1 to 4 comprises the following steps: 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 guide member 5 in turn for primary and secondary deceleration; S3, the water body after slowing down flows downward to the magnetic adsorption component 7 to remove the 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 is filtered, the water is discharged through the drain pipe 11 and placed in a detector for analysis and detection.

[0065] 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.

[0066] 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 people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of 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 effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the 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 component (7) therein, the magnetic adsorption component (7) being used to adsorb magnetic substances in water, and a drainage pipe (11) is provided at the bottom of the magnetic adsorption chamber (1); A water inlet pipe (3) is arranged at the top of the magnetic adsorption chamber (1) and 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 arranged horizontally; A flow guide member (5) connected to the outlet end of the water inlet pipe (3), the flow guide member (5) being arranged above the magnetic adsorption component (7), the cross-sectional channel of the flow guide member (5) being larger than the cross-sectional channel of the water inlet pipe (3), and a flow guide frame (53) for passing through the water body being arranged at the bottom of the flow guide member (5); A detection tube (9) communicates with the space below the magnetic adsorption component (7) in the magnetic adsorption chamber (1); A water quality detection unit comprises a detection instrument and a detection probe (10) capable of being inserted into the detection tube (9).

2. A water quality detection device according to claim 1, characterized in that: Also includes: A flow decelerator (6) is arranged between the flow guide (5) and the magnetic adsorption assembly (7) and is used to decelerate the water passing through the flow guide frame (53); the flow decelerator (6) comprises a flow guide grid (62) capable of passing through the water.

3. A water quality detection device according to claim 2, characterized in that: The flow slowing member (6) further comprises a fixing rod (61), and the flow guiding grid (62) is fixed in the magnetic adsorption chamber (1) via the fixing rod (61).

4. A water quality detection device according to claim 3, characterized in that: A plurality of fixing rods (61) are arranged on the guide grid (62); the fixing rods (61) are elastic rods.

5. A water quality detection device according to claim 2, characterized in that: The flow guide grid (62) is composed of inclined sections and horizontal sections that are alternately arranged.

6. A water quality detection device according to claim 2, characterized in that: The flow guide grid (62) is a three-dimensional network structure made of hard plastic or hard non-magnetic adsorption metal.

7. A water quality detection device according to claim 1, characterized in that: The magnetic adsorption assembly (7) is composed of a plurality of horizontally arranged magnetic adsorption bars (71), with a gap between two adjacent magnetic adsorption bars (71); when the magnetic adsorption bars (71) are arranged in multiple layers from top to bottom, the magnetic adsorption bars (71) in the lower layer are staggered in the horizontal direction with the magnetic adsorption bars (71) in the upper layer.

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

9. A water quality detection device according to claim 7, characterized in that: The magnetic adsorption rod (71) comprises two connecting columns (711); the two connecting columns (711) are connected by an arc segment (712); and the arc segment (712) has a uniform thickness.

10. 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), and a gap is provided between two adjacent hollow arc-surface bodies (72); the hollow arc-surface bodies (72) include hollow spheres and / or hollow ellipsoids.

11. 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) which are 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 arranged on the top of the vertical section (32).

12. 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 component (54) is provided at one end of the flow guide housing (51) away from the outlet end of the water inlet pipe (3).

13. A water quality detection device according to claim 1, characterized in that: The detection tube (9) comprises a horizontal S-tube (91), one end of the horizontal S-tube (91) 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).

14. A detection method based on the water quality detection device according to any one of claims 1 to 13, 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 member (5) in sequence for 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 substances are 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.

15. Use of the water quality detection device according to any one of claims 1 to 13 in water quality analysis, characterized in that: The water body for the water quality analysis includes sewage from a water treatment station or a pilot plant and filtered water samples.

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