Water quality detection device

Abstract

The invention relates to the technical field of water quality detection devices, in particular to a water quality detection device. According to the technical scheme, the device comprises a rack and a transparent detection tube mounted in the rack, optical detection modules are fixedly mounted in the rack and located on the two sides of the detection tube, the device further comprises a sliding groove formed in one side of the detection tube, a lifting driving assembly mounted in the rack and used for driving the detection tube to do lifting motion, and a blocking and draining part mounted in the rack, the plugging drainage part comprises a plugging pipe which is rotationally mounted in the rack and used for plugging the sliding groove, and a plurality of drainage mechanisms are fixedly mounted on the plugging pipe. The technical problem that pipeline pollution and detection continuity are difficult to consider in optical detection is effectively solved, the accuracy and reliability of long-term monitoring data are greatly improved, meanwhile, the maintenance frequency and use of chemical cleaning agents are reduced, and the system has the important advantages of being high in automation degree and high in severe water quality adaptability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water quality detection devices, in particular to a water quality detection device. BACKGROUND

[0002] In the current water quality monitoring technical field, online optical detection devices are widely used due to their high efficiency and continuity. The typical structure of the online optical detection devices usually adopts a fixed transparent measurement pipeline. When the water sample to be measured flows through the pipeline, the optical sensor analyzes the water body in real time through the pipeline wall. However, this structure has a long-standing core contradiction that has not been properly solved. In order to ensure the representativeness of the detection data, the water sample often needs to be kept in the original state or only be subjected to rough filtration, which causes the suspended particles, microorganisms, colloids and other pollutants in the water to easily adhere to the inner wall of the pipeline, forming a dirt layer that is difficult to avoid, which seriously interferes with the transmission and scattering of the light path, causing the detection data to continuously drift and distort. On the other hand, if the water sample is subjected to deep pretreatment such as fine filtration, softening or adsorption in order to avoid pollution, the original physical and chemical properties of the water body may be changed, for example, filtration removes suspended pollutants and adsorption changes organic components, so that the detection result cannot truly reflect the original water quality, losing the fundamental significance of online monitoring.

[0003] This contradiction highlights the dilemma of balancing the existing technology between the two horns of a dilemma: insufficient pretreatment causes data inaccuracy due to pipeline pollution, and excessive pretreatment causes loss of monitoring value due to distortion of the water body. Existing solutions such as periodic mechanical scraping or chemical cleaning can temporarily restore light transmission, but the detection must be interrupted during the cleaning process, which destroys the continuity of the data and cannot fundamentally avoid the cyclical accumulation of pollution. SUMMARY

[0004] The purpose of the present application is to solve the problems in the background art, and to provide a water quality detection device that can keep the detection area clean without interrupting the monitoring and without affecting the original characteristics of the water body.

[0005] The technical solution of the present application: a water quality detection device, comprising a rack and a transparent detection tube installed inside the rack, optical detection modules are fixedly installed in the rack and located on both sides of the detection tube, and further comprising: a chute provided on one side of the detection tube and a lifting drive assembly installed in the rack to drive the detection tube to move up and down; The sealing drainage component installed in the rack interior, the sealing drainage component includes the sealing cylinder installed in the rack interior and seals the chute, a plurality of drainage mechanisms are fixedly installed on the sealing cylinder, the drainage mechanism includes the installation box fixedly installed on the sealing cylinder, a plurality of flow-through holes are arranged on the installation box, the sealing plate is slidably installed in the flow-through hole, one side of the installation box is provided with a limiting assembly, the limiting assembly controls the flow-through hole in the detection tube, and the power element for driving the sealing cylinder to rotate is installed in the rack. The optical detection module is located above the drainage mechanism, the interval component for sealing the detection tube is installed below the drainage mechanism and in the detection tube, the interval component includes a plurality of elastic plates with elasticity, a lifting module for driving the elastic plate to perform lifting movement and a zooming driving element for driving the elastic plate to contract and expand.

[0006] Optionally, one end of the flow-through hole is fixedly installed with a support plate, a plurality of through holes are arranged on the support plate, the sealing plate is slidably connected with the support plate, and the elastic element is fixedly installed between the sealing plate and the support plate.

[0007] Optionally, the limiting assembly includes the connecting seat fixedly installed on the rack, a plurality of limiting plates are fixedly installed on the connecting seat, and chamfers are arranged at both ends of the limiting plate and both ends of the sealing plate.

[0008] Optionally, the power element includes the first motor fixedly installed on the rack, and the output shaft of the first motor is fixedly connected with the sealing cylinder in a same axis.

[0009] Optionally, the lower portion of the sealing cylinder is provided with a drainage pipeline, the drainage pipeline is in communication with a plurality of installation boxes, a drainage pipe is fixedly installed at the bottom of the drainage pipeline through a rotating joint, and the first electric control valve is fixedly installed on the drainage pipe.

[0010] Optionally, the elastic plate includes a rubber body and a sealing ring fixedly installed at the edge of the rubber body, and the shapes of the sealing ring and the rubber body are consistent with the cross-sectional shape of the sealing cylinder and the detection tube.

[0011] Optionally, the lifting module includes the driving rod slidably installed on the rack, the driving rod is fixedly connected with a plurality of rubber bodies, the bottom of the driving rod is fixedly installed with a connecting plate, the first push rod motor is fixedly installed on the rack, and the output shaft of the first push rod motor is fixedly connected with the connecting plate.

[0012] Optionally, the scaling drive comprises a sliding body corresponding to the rubber body and slidingly mounted on the drive rod, a plurality of connecting rods are rotatably mounted on the sliding body, the other end of the connecting rod is rotatably connected with the rubber body, a plurality of connecting rods are fixedly mounted on the sliding body, the other end of the plurality of connecting rods is fixedly connected with a power plate, a second push rod motor is fixedly mounted on the connecting plate, and the output shaft of the second push rod motor is fixedly connected with the power plate. The two sliding bodies connected with the adjacent two rubber bodies are symmetrically arranged.

[0013] Optionally, a water inlet is arranged on one side of the top end of the detection tube, and a second electric control valve is fixedly mounted on the water inlet. The lifting drive assembly comprises a second motor fixedly mounted on the rack, a lead screw rotatably mounted on the rack and fixedly connected with the output shaft of the second motor, and a lifting block slidingly mounted in the rack and threadedly connected with the lead screw. The optical detection module comprises a light source and a lens fixedly mounted on the rack and located on one side of the detection tube, and a phototube and an amplifier fixedly mounted on the rack and located on the other side of the detection tube.

[0014] Optionally, a cleaning mechanism for cleaning the inner wall of the detection tube below the spacing component is mounted on the rack, the cleaning mechanism comprises a plurality of cleaning rods rotatably mounted on the rack, a brush is fixedly mounted on the cleaning rod, a belt wheel is fixedly mounted on the bottom of the cleaning rod, a transmission belt is connected between adjacent two belt wheels, a third motor is fixedly mounted on the rack, and the output shaft of the third motor is coaxially fixedly connected with one of the belt wheels. A flow guide cover is fixedly mounted on the rack below the detection tube.

[0015] In summary, the present application has at least one of the following beneficial technical effects: The device effectively solves the technical problem that pipeline pollution and detection continuity are difficult to balance in optical detection by using the innovative structure of detection tube lifting movement and partition sealing cleaning, realizes dynamic switching and online self-cleaning of the detection area on the premise of ensuring that the original characteristics of the water body are not affected by pretreatment, greatly improves the accuracy and reliability of long-term monitoring data, reduces the maintenance frequency and the use of chemical cleaning agents, and has the important advantages of high automation and strong ability to adapt to poor water quality. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure of the water quality detection device is shown in the figure. Figure 1 ; Figure 2Structure diagram of water quality detection device Figure 2 Figure 3 Structure diagram of water quality detection device Figure 3 ; Figure 4 Structure diagram of water quality detection device Figure 4 ; Figure 5 Structure diagram of chute Figure 6 Position diagram of flow release mechanism Figure 7 Structure diagram of Figure 5 enlarged view of A in FIG. 4 Figure 8 Structure diagram of flow release mechanism Figure 9 Structure diagram of Figure 7 enlarged view of B in FIG. 4 Figure 10 Structure diagram of drain hole Figure 11 Structure diagram of Figure 3 enlarged view of C in FIG. 4 Figure 12 Structure diagram of spacing component Figure 1 ; Figure 13 Structure diagram of spacing component Figure 2 ; Figure 14 Structure diagram of Figure 12 enlarged view of D in FIG. 4 Figure 15 Structure diagram of cleaning mechanism Figure 16 Structure diagram of optical detection module

[0017] Reference signs: 1, detection tube; 11, water inlet; 12, second electric control valve; 13, chute; 14, lifting driving assembly; 141, second motor; 142, screw rod; 143, lifting block; 144, fastening rod; 145, guide rod; 2, optical detection module; 21, light source; 22, lens; 23, phototube; 24, amplifier; 3, plugging drainage component; 31, plugging column body; 32, flow release mechanism; 321, mounting box; 322, flow-through hole; 323, plugging plate; 324, support plate; 325, through hole; 326, elastic member; 327, connecting seat; 328, limiting plate; 33, first motor; 34, drainage pipeline; 35, rotary joint; 36, drain pipe; 37, first electric control valve; 4. Spacer component; 41. Elastic plate; 411. Rubber body; 412. Sealing ring; 42. Lifting module; 421. Drive rod; 422. Connecting plate; 423. First push rod motor; 43. Scaling drive component; 431. Sliding body; 432. Connecting rod; 433. Connecting rod; 434. Power plate; 435. Second push rod motor; 5. Cleaning mechanism; 51. Cleaning rod; 52. Pulley; 53. Drive belt; 54. Third motor; 6. Radiator fairing; 7. Frame. Detailed Implementation

[0018] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Examples, such as Figures 1 to 4 and Figure 16 As shown, the water quality testing device proposed in this invention includes a frame 7 and a transparent testing tube 1 installed inside the frame 7. A water inlet 11 is provided on one side of the top of the testing tube 1, and a second electrically controlled valve 12 is fixedly installed on the water inlet 11. Water enters the testing tube 1 through the second electrically controlled valve 12. Optical testing modules 2 are fixedly installed inside the frame 7 and on both sides of the testing tube 1. The optical testing modules 2 include a light source 21 and a lens 22 fixedly installed on the frame 7 and on one side of the testing tube 1, and a phototube 23 and an amplifier 24 fixedly installed on the frame 7 and on the other side of the testing tube 1. The light source 21 serves as the signal transmitter of the system, responsible for emitting a stable light beam of a specific wavelength. The light then passes through the lens 22, which collimates and focuses the light beam, shaping the divergent light from the light source into a parallel and concentrated beam, enabling it to efficiently pass through the tube wall of the testing tube 1. When a light beam penetrates the flowing water sample, it interacts with the substances being tested in the water. Suspended particles scatter the light, while dissolved substances absorb light of specific wavelengths, causing the intensity of the penetrating light to decrease. The light carrying water quality information passes through the water sample and reaches the other side of the detection tube, where it is received by phototube 23. Phototube 23 performs photoelectric conversion, linearly converting the intensity of the received weak light signal into a corresponding weak current signal. This extremely weak electrical signal is then sent to amplifier 24, which amplifies the current signal output by phototube 23 so that subsequent data acquisition cards or controllers can accurately read and process it. Finally, the system processor analyzes the intensity changes of this signal and, based on a preset algorithm model, calculates the specific water quality parameters of the water sample, thus completing a real-time, online optical water quality detection.

[0020] like Figures 1 to 4As shown, the embodiment also includes a chute 13 arranged on one side of the detection tube 1 and a lifting driving assembly 14 installed in the rack 7 to drive the lifting movement of the detection tube 1. The lifting movement of the detection tube 1 can change the contact area of the detection tube 1 with the emitted light of the optical detection module 2, prevent local pollution in the detection tube 1, and cause inaccurate detection data. The lifting driving assembly 14 includes a second motor 141 fixedly installed on the rack 7, a lead screw 142 rotatably installed on the rack 7 and fixedly connected with the output shaft of the second motor 141, a lifting block 143 slidably installed in the rack 7 and threadedly connected with the lead screw 142, a fastening rod 144 fixedly installed between the lifting block 143 and the detection tube 1, a guide rod 145 fixedly installed in the rack 7 and slidably connected with the lifting block 143. The second motor 141 can drive the lead screw 142 to rotate, and the rotating lead screw 142 drives the detection tube 1 to lift under the guidance of the guide rod 145 through the fastening rod 144.

[0021] As shown, Figures 5 to 10 The embodiment also includes a plugging and draining component 3 installed in the rack 7. The plugging and draining component 3 includes a plugging cylinder 31 rotatably installed in the rack 7 to plug the chute 13. The plugging cylinder 31 is fixedly installed with a plurality of drainage mechanisms 32. The drainage mechanism 32 includes a mounting box 321 fixedly installed on the plugging cylinder 31. The mounting box 321 is provided with a plurality of flow-through holes 322. The water after detection can be discharged from the detection tube 1 through the flow-through holes 322, and the chute 13 is plugged under the action of the plugging cylinder 31 to prevent the water from being discharged through the chute 13. Under the action of the drainage mechanism 32, the position of the drainage hole discharged through the detection tube 1 can be ensured to be unchanged, and the detection tube 1 below will not be interfered. The flow-through hole 322 is slidably installed with a plugging plate 323. The plugging plate 323 plugs the flow-through hole 322. When the plugging plate 323 slides out of the flow-through hole 322, the flow-through hole 322 will flow. At this time, the water will enter the inside of the mounting box 321 through the flow-through hole 322. One side of the mounting box 321 is provided with a limiting assembly to control the flow-through of the flow-through hole 322 in the detection tube 1. The rack 7 is installed with a power member to drive the rotation of the plugging cylinder 31.

[0022] Further, one end of the flow-through hole 322 is fixedly installed with a support plate 324, a plurality of through holes 325 are arranged on the support plate 324, the blocking plate 323 is in sliding connection with the support plate 324, the elastic element 326 is fixedly installed between the blocking plate 323 and the support plate 324, the elastic element 326 is a spring, and the blocking plate 323 always has a tendency to slide outward under the action of the elastic element 326. When the blocking plate 323 is not blocked by external force, the blocking plate 323 can be moved to the outside of the flow-through hole 322 under the action of the elastic element 326. The limiting assembly includes a connecting seat 327 fixedly installed on the rack 7, a plurality of limiting plates 328 are fixedly installed on the connecting seat 327, and chamfers are arranged at both ends of the limiting plate 328 and both ends of the blocking plate 323. When the blocking plate 323 contacts the limiting plate 328, the limiting plate 328 provides a supporting force to the blocking plate 323, so that the blocking plate 323 cannot be separated from the flow-through hole 322. When the blocking plate 323 rotates to the inside of the detection tube 1, the blocking plate 323 is not blocked at this time, and the flow-through hole 322 flows under the action of the elastic element 326. When the blocking plate 323 rotates to the position in contact with the limiting plate 328 again, the blocking plate 323 can be extruded into the inside of the flow-through hole 322 again under the action of the chamfer, so that the flow-through hole 322 is in a sealing state again.

[0023] The power element includes a first motor 33 fixedly installed on the rack 7, the output shaft of the first motor 33 is coaxially fixedly connected with the blocking column 31, and the first motor 33 can drive the blocking column 31 to rotate. At this time, the blocking column 31 located in the inside of the detection tube 1 can be rotated to the outside, so as to prevent a large amount of adhesion from adhering to the surface of the blocking column 31 located in the inside of the detection tube 1. The cleaning component arranged outside the blocking column 31 can clean the blocking column 31, so that the blocking column 31 always maintains a clean state. The cleaning component is a mature technology, and will not be described here.

[0024] Further, the bottom of the blocking column 31 is provided with a drainage pipeline 34, the drainage pipeline 34 is in communication with a plurality of installation boxes 321, the bottom of the drainage pipeline 34 is fixedly installed with a drainage pipe 36 through a rotating joint 35, the first electric control valve 37 is fixedly installed on the drainage pipe 36, and the water body entering the inside of the flow-through hole 322 will enter the drainage pipeline 34 and be discharged to the outside after passing through the drainage pipeline 34, the rotating joint 35, the drainage pipe 36 and the first electric control valve 37.

[0025] As Figures 11 to 14As shown, in the embodiment, the optical detection module 2 is located above the drainage mechanism 32, and below the drainage mechanism 32 and inside the detection tube 1 is installed a spacing component 4 for sealing the inside of the detection tube 1, which includes a plurality of elastic plates 41 having elasticity, a lifting module 42 for driving the elastic plates 41 to perform lifting movement, and a zoom driving piece 43 for driving the elastic plates 41 to perform contraction and expansion. The elastic plates 41 seal the detection tube 1, so that the water being detected above the detection tube 1 cannot enter the lower part of the detection tube 1 and can be directly discharged through the drainage mechanism. When cleaning the inner wall of the lower detection tube 1, the cleaning liquid will not contaminate the water being detected above, so that the detection tube 1 can be cleaned while the water is being detected, and in combination with the lifting driving assembly 14 for driving the detection tube 1 to move up and down, the upper and lower positions of the detection tube 1 can be cleaned.

[0026] Further, the elastic plate 41 includes a rubber body 411 and a sealing ring 412 fixedly installed on the edge of the rubber body 411, and the rubber body 411 and the sealing ring 412 are both elastic and can be elastically deformed to apply elastic force to the inner wall of the detection tube 1, so that the detection tube 1 can be effectively sealed. The sealing ring 412 and the rubber body 411 have the same shape as the cross-sectional shape of the sealing column 31 and the detection tube 1, which improves the stability of the sealing. The lifting module 42 includes a driving rod 421 slidingly installed on the rack 7, the driving rod 421 is fixedly connected with a plurality of rubber bodies 411, and the bottom of the driving rod 421 is fixedly installed with a connecting plate 422. The first push rod motor 423 is fixedly installed on the rack 7, the output shaft of the first push rod motor 423 is fixedly connected with the connecting plate 422, the connecting plate 422 can be driven to move up and down by the first push rod motor 423, and the rubber body 411 can be driven to perform lifting movement by the driving rod 421.

[0027] It should be noted that the upper part of the rubber body 411 is the detection area and the lower part is the cleaning area, and in order to avoid mutual contamination of the upper and lower areas, the elastic plate 41 is sealed. However, this will have the following problems: when the detection tube 1 moves downward, the inner wall of the detection tube 1 slides relative to the sealing ring 412, which makes the sealing ring 412 block the adhesion on the inner wall of the detection tube 1 through the sealing ring 412 and scratch the adhesion, so that the adhesion continuously accumulates in the detection area, which affects the detection structure and cannot effectively discharge the adhesion on the detection tube 1 through the cleaning area.

[0028] Further, the above problems can be solved by the scaling drive 43, which can ensure that the adhering objects can effectively enter the cleaning area and prevent the cleaning area from polluting the water in the detection area. The scaling drive 43 includes a sliding body 431 corresponding to the rubber body 411 and slidingly installed on the drive rod 421. A plurality of connecting rods 432 are rotatably installed on the sliding body 431, and the other ends of the connecting rods 432 are rotatably connected to the rubber body 411. A plurality of connecting rods 433 are fixedly installed on the sliding body 431, and the other ends of the connecting rods 433 are fixedly connected to a power plate 434. A second push rod motor 435 is fixedly installed on the connecting plate 422, and the output shaft of the second push rod motor 435 is fixedly connected to the power plate 434. The second push rod motor 435 can drive the plurality of sliding bodies 431 to move up and down, and in turn drive the plurality of connecting rods 432 to rotate. The rotating connecting rods 432 will exert a pushing force or a pulling force on the rubber body 411, so that the rubber body 411 is contracted inwardly or expanded outwardly and contacts the inner wall of the detection tube 1.

[0029] It is worth noting that the two sliding bodies 431 connected to the adjacent two rubber bodies 411 are symmetrically arranged, which makes the contraction of the adjacent two rubber bodies 411 in opposite states when the sliding bodies 431 move up and down, i.e., one rubber body 411 is contracted and the other rubber body 411 is expanded. This can make only one rubber body 411 on the upper and lower sides seal the detection tube 1. When the detection tube 1 needs to be cleaned, the detection tube 1 is moved downward, and the following steps are performed: First, the lower rubber body 411 seals the detection tube 1, and the rubber body 411 is driven by the first push rod motor 423 to move downward synchronously with the detection tube 1. When the detection tube 1 moves a distance and stops, the rubber body 411 is driven by the first push rod motor 423 to move upward quickly, and after the upward movement is completed, the upper rubber body 411 seals the detection tube 1 by the second push rod motor 435, and the lower rubber body 411 does not contact the detection tube 1. At this time, the pollutants scraped off the detection tube 1 are located between the upper and lower rubber bodies 411, which do not pollute the water in the upper detection area, and the pollutants can be discharged.

[0030] Only a single drive mechanism, i.e., a single first push rod motor 423 and a single second push rod motor 435, is provided here. If the cleaning effect needs to be improved, two sets of drive mechanisms, i.e., two sets of spacing components 4, can be provided. At this time, only a single rubber body 411 is needed for each set. The operation mode of this setting is as follows: First, the upper rubber body 411 does not contact the detection tube 1 under the action of the second push rod motor 435, and the lower rubber body 411 moves downward with the detection tube 1 under the action of the first push rod motor 423. When the downward movement is completed, the upper rubber body 411 is first contacted with the detection tube 1 under the action of the second push rod motor 435, and the lower rubber body 411 is driven to rise under the action of another set of first push rod motor 423, so as to preliminarily scrape off the adhering matter on the inner wall of the detection tube 1 (the rubber body 411 can also be retracted and then raised). Subsequently, the area below the detection tube 1 can be cleaned.

[0031] As shown in Figure 15 In the embodiment, the rack 7 is provided with a cleaning mechanism 5 for cleaning the inner wall of the detection tube 1 below the spacing component 4. The cleaning mechanism 5 includes a plurality of cleaning rods 51 rotatably installed on the rack 7. The cleaning rods 51 are fixedly provided with brushes. The bottom of the cleaning rod 51 is fixedly provided with a belt wheel 52. Adjacent two belt wheels 52 are connected by a transmission belt 53. The rack 7 is fixedly provided with a third motor 54. The output shaft of the third motor 54 is coaxially fixedly connected with one of the belt wheels 52. The third motor 54 can drive the plurality of cleaning rods 51 to rotate synchronously, so as to clean the inner wall of the detection tube 1 by the brushes. The cleaning mechanism 5 can also spray cleaning liquid on the inner wall of the detection tube 1 by adding a spray pipe or using other cleaning methods. The cleaning mechanism 5 is a prior art, which will not be described here.

[0032] Further, the rack 7 is fixedly provided with a flow guide cover 6 below the detection tube 1. The water between the upper and lower rubber bodies 411 will be discharged from the bottom of the detection tube 1. The cleaning liquid will also be discharged. The discharged liquid will be collected by the flow guide cover 6 and uniformly discharged.

[0033] Working principle: The water to be tested enters the detection tube 1 through the water inlet 11. The light source 21 emits a light beam which is collimated by the lens 22 and penetrates the flowing water sample in the detection tube 1. The light carrying water quality information is received by the photocell 23 and converted into an electrical signal. After being processed by the amplifier 24, the water quality parameters are obtained. During the detection, the lifting drive assembly 14 drives the detection tube 1 to slowly rise and fall to change the measurement area of the optical detection module 2 to prevent local pollution. At the same time, the drainage mechanism 32 of the blocking drainage component 3 keeps flowing in the detection tube 1, so that the water after detection enters the installation box 321 through the flow hole 322 and is discharged through the drain pipe 36. When cleaning is needed, the elastic plate 41 of the spacing component 4 alternately forms a seal under the control of the lifting module 42 and the zoom drive 43, so that the pollutants scraped off during the downward movement of the detection tube 1 are limited between the upper and lower elastic plates 41 and finally fall into the cleaning area to be brushed by the rotating cleaning mechanism 5, so that the detection and cleaning are carried out synchronously.

[0034] The above specific embodiments are only several optional embodiments of the present application, and based on the technical scheme of the present application and the related inspiration of the above embodiments, the person skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

Claims

1. A water quality detection device, comprising a frame (7) and a transparent detection tube (1) installed inside the frame (7), and an optical detection module (2) fixedly installed in the frame (7) and located on both sides of the detection tube (1), characterized in that, Also include: The chute (13) is arranged on one side of the detection tube (1), and the lifting driving assembly (14) for driving the lifting movement of the detection tube (1) is installed in the rack (7); The sealing and drainage component (3) is installed in the rack (7), the sealing and drainage component (3) includes a sealing cylinder (31) rotatably installed in the rack (7) to seal the chute (13), a plurality of drainage mechanisms (32) are fixedly installed on the sealing cylinder (31), the drainage mechanism (32) includes a mounting box (321) fixedly installed on the sealing cylinder (31), a plurality of flow-through holes (322) are arranged on the mounting box (321), a sealing plate (323) is slidably installed in the flow-through hole (322), a limiting assembly is arranged on one side of the mounting box (321), the limiting assembly controls the flow-through of the flow-through hole (322) in the detection tube (1), and a power member for driving the sealing cylinder (31) to rotate is installed in the rack (7); The optical detection module (2) is located above the drainage mechanism (32), the interval component (4) for sealing the inside of the detection tube (1) is installed below the drainage mechanism (32) and in the detection tube (1), the interval component (4) includes a plurality of elastic plates (41) having elasticity, a lifting module (42) for driving the elastic plates (41) to lift, and a zoom driving member (43) for driving the elastic plates (41) to contract and expand.

2. The water quality detection device according to claim 1, characterized in that, One end of the flow-through hole (322) is fixedly installed with a supporting plate (324), a plurality of through holes (325) are arranged on the supporting plate (324), the sealing plate (323) and the supporting plate (324) are slidably connected, and an elastic member (326) is fixedly installed between the sealing plate (323) and the supporting plate (324).

3. The water quality detection device according to claim 2, characterized in that, The limiting assembly includes a connecting seat (327) fixedly installed on the rack (7), a plurality of limiting plates (328) are fixedly installed on the connecting seat (327), and chamfers are arranged at both ends of the limiting plate (328) and both ends of the sealing plate (323).

4. The water quality detection device according to claim 3, characterized in that, The power member includes a first motor (33) fixedly installed on the rack (7), and the output shaft of the first motor (33) is coaxially and fixedly connected with the sealing cylinder (31).

5. The water quality detection device according to claim 4, characterized in that, A drainage pipeline (34) is arranged below the sealing cylinder (31), the drainage pipeline (34) communicates with a plurality of the mounting boxes (321), a drainage pipe (36) is fixedly installed at the bottom of the drainage pipeline (34) through a rotating joint (35), and a first electric control valve (37) is fixedly installed on the drainage pipe (36).

6. The water quality detection device according to claim 5, wherein The elastic plate (41) includes a rubber body (411) and a sealing ring (412) fixedly installed on the edge of the rubber body (411), and the shapes of the sealing ring (412) and the rubber body (411) are consistent with the cross-sectional shape of the sealing cylinder (31) and the detection tube (1).

7. The water quality detection device according to claim 6, characterized in that, The lifting module (42) comprises a driving rod (421) slidingly installed on the rack (7), the driving rod (421) is fixedly connected with a plurality of the rubber bodies (411), and the bottom of the driving rod (421) is fixedly installed with a connecting plate (422); and the rack (7) is fixedly installed with a first push rod motor (423), and the output shaft of the first push rod motor (423) is fixedly connected with the connecting plate (422).

8. The water quality detection device according to claim 7, characterized in that, The scaling drive (43) comprises a sliding body (431) slidingly installed on the driving rod (421) and corresponding to the rubber body (411); a plurality of connecting rods (432) are rotatably installed on the sliding body (431); the other ends of the connecting rods (432) are rotatably connected with the rubber body (411); a plurality of connecting rods (433) are fixedly installed on the sliding body (431); the other ends of the plurality of connecting rods (433) are fixedly connected with a power plate (434); the connecting plate (422) is fixedly installed with a second push rod motor (435); and the output shaft of the second push rod motor (435) is fixedly connected with the power plate (434). The two sliding bodies (431) connected with the adjacent two rubber bodies (411) are symmetrically arranged.

9. The water quality detection device according to claim 8, characterized in that, The top end side of the detection tube (1) is provided with a water inlet (11), and the water inlet (11) is fixedly installed with a second electric control valve (12). The lifting drive assembly (14) comprises a second motor (141) fixedly installed on the rack (7), a lead screw (142) rotatably installed on the rack (7) and fixedly connected with the output shaft of the second motor (141), and a lifting block (143) slidingly installed in the rack (7) and threadedly connected with the lead screw (142); the lifting block (143) and the detection tube (1) are fixedly installed with a fastening rod (144); the rack (7) is fixedly installed with a guide rod (145); and the guide rod (145) is slidingly connected with the lifting block (143). The optical detection module (2) comprises a light source (21) and a lens (22) fixedly installed on the rack (7) and located on one side of the detection tube (1), and a photoelectric tube (23) and an amplifier (24) fixedly installed on the rack (7) and located on the other side of the detection tube (1).

10. The water quality detection device according to claim 9, wherein The rack (7) is installed with a cleaning mechanism (5) for cleaning the inner wall of the detection tube (1) and located below the spacing component (4); the cleaning mechanism (5) comprises a plurality of cleaning rods (51) rotatably installed on the rack (7); the cleaning rods (51) are fixedly installed with brushes; the bottom of each cleaning rod (51) is fixedly installed with a belt wheel (52); adjacent two belt wheels (52) are connected with a transmission belt (53); the rack (7) is fixedly installed with a third motor (54); and the output shaft of the third motor (54) is coaxially fixedly connected with one of the belt wheels (52). The rack (7) is fixedly installed with a flow guide cover (6) below the detection tube (1).

Images