Sewage concentration detection system and detection method

Abstract

The invention relates to a sewage concentration detection system and method, and relates to the technical field of sewage concentration detection.The sewage concentration detection system comprises a sewage pool and a mud scraper rotationally arranged in the sewage pool, and the mud scraper comprises a truss consistent with the sewage pool in the radius direction; comprising multiple groups of sampling pipes slidably arranged on a truss and a power part for lifting and driving the sampling pipes, the two ends of each sampling pipe are open, the depths of the multiple groups of sampling pipes extending into a sewage pool are different, and the multiple groups of sampling pipes are arranged at intervals; the truss is further provided with an adjusting assembly used for the sampling pipe to accurately sample sewage at different depths, and the sewage concentration detection precision can be conveniently improved, so that the subsequent sewage treatment effect is improved.

Description

Technical Field

[0001] This application relates to the technical field of sewage treatment, and in particular to a sewage concentration detection system and a detection method. Background Art

[0002] Sewage concentration detection refers to the mass of pollutants or solid substances contained in unit volume of sewage, which is directly related to the sewage treatment effect and water quality safety. Sewage concentration detection is of great significance for evaluating the operation effect of sewage treatment equipment, predicting the sludge treatment cost and time, and ensuring the water environment quality and ecological safety. By regularly detecting the sewage concentration, pollutants in the sewage can be discovered and treated in time to prevent them from harming the environment and human health.

[0003] When commonly detecting the sewage concentration, the drying and weighing method is usually adopted for the sewage concentration detection. First, samples need to be taken in the sewage treatment tank, then filtered through filter cloth or filter paper, and the water and soluble substances in the sewage are collected through a vacuum pump by means of the filter paper or filter cloth. Then, the collected sludge residue together with the filter paper is put into an oven for drying and weighing, and finally the sewage concentration is obtained.

[0004] In view of the above related technologies, when detecting the sewage concentration, samples need to be taken in the sewage tank. Since there is uneven concentration in the vertical direction in the sewage tank, especially during the flowing process, the sludge content in the surface sewage is low, the content of flocs and floating substances in the middle and upper layer sewage is high, and the sludge content in the middle and lower layer sewage is low. It is not easy to mix the sewage evenly during sampling, so errors are likely to occur during the sampling process, affecting the detection result of the sludge concentration in the sewage, and further affecting the subsequent sewage treatment plan and the sewage treatment effect. Summary of the Invention

[0005] In order to facilitate improving the accuracy of sewage concentration detection and thus improving the subsequent sewage treatment effect, this application provides a sewage concentration detection system and a detection method.

[0006] A sewage concentration detection system and a detection method provided by this application adopt the following technical solutions: A sewage concentration detection system and a detection system include a sewage tank, and a sludge scraper rotatably arranged in the sewage tank. The sludge scraper includes a truss consistent with the radial direction of the sewage tank, including a detection box arranged on the truss, a sampling pipe slidably arranged on the truss, and a power member for driving the sampling pipe to lift. There are multiple groups of the sampling pipes, and the depths at which the multiple groups of sampling pipes extend into the sewage tank are inconsistent. The multiple groups of sampling pipes are arranged at intervals. An adjusting component for accurately sampling sewage at different depths by the sampling pipe is also arranged on the truss; The adjusting assembly includes a bracket slidably disposed on the truss, the sampling tube is slidably disposed on the bracket, and a pressing wheel for pressing against the sampling tube is rotatably disposed on the bracket. There are multiple groups of pressing wheels, and the multiple groups of pressing wheels correspond to the multiple groups of sampling tubes one by one. Each group of pressing wheels includes two pressing wheels arranged oppositely, and the two pressing wheels clamp the sampling tube; The lengths of adjacent sampling tubes are inconsistent, and the rotation speed of each group of pressing wheels matches the length of the sampling tube, that is, when the sampling tube extends into the sewage tank, all the sampling tubes reach the sampling position synchronously, and then subsequent sampling operations are carried out.

[0007] By adopting the above technical solution, when sampling and detecting the sewage in the sewage tank, the bracket is driven to lift and lower by the power component. During the process of the bracket descending, the pressing wheels lift the sampling tubes to different degrees, so that all the sampling tubes descend simultaneously towards the direction in the sewage tank, thereby realizing simultaneous sampling of the sewage at different depths in the sewage tank.

[0008] In the conventional technology, when sampling the sewage tank, the sampling cylinder is thrown into the sewage tank for sampling, or sampling is carried out by means of negative pressure. The sewage sampled by the method of throwing the sampling cylinder is all the sewage on the surface of the sewage tank, and the sampling is inaccurate. When sampling by means of negative pressure, the flow of the sewage in the sewage tank will be affected, and sampling errors will occur with the flow of the sewage when sampling different areas. By setting multiple sampling tubes in a lifting form and setting the sampling tubes in a form with both ends open, the flow of sewage is reduced during the process of inserting the sampling tubes into the sewage, and the stroke cycles of all the sampling tubes are synchronized, so as to realize the synchronous sampling of all the sampling tubes, reduce the systematic error and accidental error caused by the difference in different sampling times, and thus improve the accuracy of sewage concentration detection.

[0009] Moreover, the sampling of the sampling tube is carried out by setting the pressing wheel. Since the sampling tube often adopts the form of a transparent glass tube or a transparent plastic tube for the convenience of relevant technical personnel to observe the sampling situation, and the inconsistent depths of multiple groups of sampling tubes extending into the sewage tank will also lead to inconsistent lengths of the sampling tubes themselves. Therefore, if different power sources are set to control the stroke cycle of the sampling tube, it will cause waste of power sources and it is not easy to keep the lifting of the sampling tubes synchronized. By setting multiple groups of pressing wheels to clamp and lift-drive the sampling tubes, all the pressing wheels rotate synchronously, thereby reducing the input of additional power sources, and at the same time the control program is simple, reducing the operation threshold of relevant technical personnel.

[0010] Optionally, the adjusting assembly further includes adjusting gears disposed at the rotating shafts of the pressing wheels. The adjusting gears corresponding to the two pressing wheels in the same group are meshed with each other. A synchronous gear is further disposed at the center of any one of the adjusting gears in the same group on the bracket. The synchronous gears corresponding to multiple groups of pressing wheels are drivingly connected. The diameters of multiple groups of synchronous gears are arranged in inverse proportion to the length of the sampling pipe. When the length of the sampling pipe is the shortest, the diameter of the corresponding synchronous gear is the largest.

[0011] By adopting the above technical solution, when sampling sewage pools at different depths, by setting synchronous gears with different diameters, when adjusting the lifting of the sampling pipe, the synchronous gears are drivingly connected through a transmission chain, so that the rotational speeds of the synchronous gears with different diameters are inconsistent. The smaller the diameter of the synchronous gear, the faster the rotational speed, so that the pressing wheel corresponding to the sampling pipe with the longest length rotates faster and descends faster, thereby realizing that the descending periods of sampling pipes with different lengths are consistent and realizing synchronous sampling of all sampling pipes.

[0012] Optionally, a sliding gear is rotatably connected to the bracket. A support column is provided on the sludge scraper. The support column is rotatably connected to the bottom wall of the sewage pool. A sliding rack is provided on the support column. The sliding rack is meshed with the sliding gear. A blocking member for movably blocking the top of the sampling pipe is further provided on the bracket.

[0013] By adopting the above technical solution, during the process of the bracket being driven by a power member to lift and lower, through the sliding rack provided on the support column, during the process of the bracket descending, the sliding gear rotates under the action of the sliding rack, and then under the driving action of the sliding gear and the synchronous gear, the synchronous gear is driven to rotate, realizing the rotational driving of multiple groups of pressing wheels, and finally realizing the lifting and sampling operation of the sampling pipe.

[0014] At the same time, by setting a blocking member to movably block the top of the sampling pipe, after the sampling pipe extends into the sewage pool, at this time, the end side of the sampling pipe extending into the sewage pool is filled with sewage. After the blocking member blocks the top of the sampling pipe, the sampling pipe is lifted by the power member, so as to realize accurate sampling in the sewage pool. By sampling in this way, the flow of sewage in the sewage pool during sampling is reduced, so as to reduce the interference caused by any group of sampling pipes during sampling to the sampling of surrounding sampling pipes, and further realize accurate sampling of each group of sampling pipes.

[0015] Optionally, the blocking member includes a mounting frame provided on the bracket. A plurality of blocking blocks are arranged on the mounting frame in a lifting manner. The blocking blocks are movably attached to the end side of the sampling pipe. A blocking airbag is provided on the end side of the blocking block corresponding to the sampling pipe. When the blocking block is attached to the end side of the sampling pipe, the blocking airbag is inflated and attached to the inner peripheral wall of the sampling pipe. A limiting member for limiting the position of the blocking block is further provided on the bracket.

[0016] By adopting the above technical solution, after all the sampling tubes descend into the sewage tank, the top heights of all the sampling tubes are the same at this time. The position of the blocking block is unlocked by the limiting member, and the blocking block descends to block the top of the sampling tube, thereby realizing the sealing of the top of the sampling tube, and further realizing the stable sampling of the sampling tube during the subsequent ascending process of the sampling tube.

[0017] By providing the blocking airbag, when the blocking block corresponds to the top of the sampling tube, the blocking airbag is inflated at this time and fits with the inner peripheral wall of the sampling tube, thereby further realizing stable sampling when the sampling tube is driven to ascend. The blocking airbag further improves the airtightness of the top of the sampling tube, so that the sewage taken in the sampling tube is not easily leaked out.

[0018] Optionally, the blocking block is elastically arranged on the mounting frame. The limiting member includes a limiting block arranged on the blocking block and a mounting block slidably arranged on the mounting frame. A limiting groove is formed on the limiting block, and the mounting block is movably inserted into the limiting groove. An opening and closing block is arranged on the support column. One end of the mounting block away from the limiting groove is movably attached to the opening and closing block. There are two groups of the opening and closing blocks, and the two groups of opening and closing blocks are arranged at intervals along the height direction of the support column.

[0019] By adopting the above technical solution, by providing two groups of opening and closing blocks arranged at intervals along the height direction of the support column, during the process of the power member driving the support to rise to the topmost position, at this time the sampling tube abuts against the blocking block and rises. During the rising process of the blocking block and the limiting block, they abut against the mounting block and slide until the height of the bottom end of the sampling tube is level. At this time, the blocking block and the limiting block rise to the topmost position. At this time, the limiting groove corresponds to the mounting block, and the mounting block locks the position of the limiting block under the action of the elastic restoring force. When it is necessary to detect again later, when the sampling tube descends, the blocking block is not easily descended with the sampling tube, so as to facilitate the sampling operation for detecting the sewage concentration again later.

[0020] During the process of the power member driving the support to descend, at this time during the descending process of the sampling tube, at this time the blocking block and the limiting block do not descend with the sampling tube under the limiting action of the mounting block, so as to be separated from the sampling tube. Until the sampling tube descends to the bottommost side, at this time the top of the sampling tube remains level. At this time, the mounting frame moves to the position of the opening and closing block, and the opening and closing block abuts against the mounting block and slides, so that the mounting block disengages from the limiting groove. At this time, the blocking block and the limiting block are released from the limit, and thus under the action of the elastic restoring force, the blocking block slides towards the top of the sampling tube until the blocking block blocks the top of the sampling tube, thereby realizing the stable sampling of the sewage in the sewage tank.

[0021] Optionally, a liquid leakage port is formed on the sampling pipe. The heights from the liquid leakage ports on all the sampling pipes to the bottom side of the sampling pipe are the same. A plug that can be opened actively is provided at the liquid leakage port. When all the sampling pipes rise to the same bottom height, the plug opens the liquid leakage port, and an opening member for adjusting the plug is further provided on the bracket.

[0022] By adopting the above technical solution, since the lengths of different sampling pipes are inconsistent and the depths extended into the sewage tank are also inconsistent, the sampling amounts of different sampling pipes are also inconsistent each time. In order to obtain the sludge content in the sewage at different depth levels more accurately, it is necessary to make each sampling pipe sample the sewage at different depths, and in order to make the test results more accurate, it is necessary to make the amounts of sewage samples retained in each sampling pipe consistent. When performing chemical method tests or physical method tests subsequently, the accuracy of result comparison is improved. Therefore, through the provided liquid leakage port, after the sampling is completed and the sampling pipe rises to the highest point, at this time, the blocking block is separated from the sampling pipe, and the plug opens the liquid leakage port, so that the sewage higher than the height of the liquid leakage port leaks out through the liquid leakage port. Since the heights from the liquid leakage ports on all the sampling pipes to the bottom side of the sampling pipe are the same, the amounts of sewage retained in the sampling pipes are made consistent, so that the accuracy of subsequent tests is consistent.

[0023] At the same time, by providing an opening member for adjusting and opening the plug, during the descent of the sampling pipe, stable blocking of the sampling pipe is achieved, and when the sampling pipe rises to the topmost position after the sampling is completed, opening of the liquid leakage port is achieved, without manual operation for liquid leakage, reducing the sedimentation of sewage in the sampling pipe due to untimely liquid leakage, thereby improving the accuracy of sewage concentration detection.

[0024] Optionally, a detection plate is rotatably provided on the bracket. The detection plate actively blocks the bottom side of the sampling pipe, and a detection valve for sewage to pass through is formed on the detection plate. A rotating member for rotating and adjusting the detection plate is further provided on the bracket. When all the sampling pipes rise to the same bottom height of the sampling pipe, the rotation will drive the detection plate to rotate to a position where it blocks the bottom of the sampling pipe.

[0025] By adopting the above technical solution, when the sampling pipe rises to the topmost position, at this time, the rotating member drives the detection plate to rotate to a position corresponding to the bottom of the sampling pipe, thereby blocking the bottom side of the sampling pipe, so that the sewage in the sampling pipe is not easily leaked out through the opening on the bottom side, facilitating the subsequent liquid leakage operation when opening the top and the liquid leakage port of the sampling pipe. And through the detection valve provided on the detection plate, when testing the sampled sewage subsequently, relevant technicians open the detection valve to make the sewage in the sampling pipe flow out through the detection valve.

[0026] Optionally, the opening and closing member includes a connecting cylinder slidably disposed on the sampling tube. The sliding direction of the connecting cylinder is consistent with the height direction of the sampling tube. One end of the connecting cylinder protrudes from the bottom side of the sampling tube, and the other end of the connecting cylinder movably seals the liquid leakage port. The plug is disposed on the connecting cylinder, and the end side of the connecting cylinder protruding from the sampling tube is movably attached to the detection plate.

[0027] By adopting the above technical solution, when the sampling tube rises to the topmost position at the end of sampling, at this time, the detection plate rotates towards the bottom of the sampling tube until the detection plate fits against the bottom end of the sampling tube. When the detection plate rotates, it presses against the connecting cylinder, so that the connecting cylinder slides upward until the liquid leakage port is exposed, so that when the bottom of the sampling tube is blocked, liquid leakage is automatically realized; During sampling, when the sampling tube descends, it presses against the detection plate to rotate, and the detection plate separates from the connecting cylinder, so that the connecting cylinder slides under the action of gravity to block the liquid leakage port, thereby realizing subsequent accurate sampling.

[0028] The present application also discloses a method for detecting the sewage concentration, including S1, cleaning. Relevant technicians use a brush to clean the sampling tube to make the inner wall of the sampling tube free of attachments such as impurities and dirt; S2, sampling. By controlling the sampling tube to descend into the sewage tank for sampling, so that each sampling tube synchronously descends to the corresponding lowest position. At this time, the sampling tube is filled with sewage with a height consistent with the sewage surface in the sewage tank due to liquid pressure, and the top of the sampling tube is blocked after the sampling tube descends to the lowest position; S3, sample control. By controlling the sampling tube to rise, since the top of the sampling tube is in a blocked state, under the action of pressure, the sampling tube together with the sampled sewage is taken out until the sampling tube rises to the corresponding highest height position. At this time, the bottom of the sampling tube is blocked, and the top and side walls of the sampling tube are opened until the amount of liquid remaining in the sampling tube is the same; S4, detection. Open the bottom of the sampling tube, transfer the remaining liquid in the sampling tube to the detection equipment for detection, and compare the detection results in different sampling tubes to judge the subsequent sewage treatment method in the sewage tank.

[0029] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting a plurality of sampling tubes with different lengths to extend into the sewage tank for sampling the sewage tank, since the depths of different sampling tubes extending into the sewage tank are inconsistent, sewage at different depths is sampled, thereby improving the detection accuracy of sewage concentration detection; 2. By setting multiple sets of pressing wheels with different rotation speeds to clamp and press the sampling tube, when adjusting the lifting drive of the sampling tube, the pressing wheels with different rotation speeds adjust the lifting of the sampling tube at this time, so that sampling tubes of different lengths reach the corresponding bottommost positions synchronously, thereby reducing the turbulent flow caused by step-by-step sampling and affecting the sampling accuracy of adjacent sampling tubes, and thus improving the comparison accuracy of subsequent detection results; 3. By setting a blocking block, a limiting block, a mounting block and an opening and closing block, during the process of the sampling tube descending, the limiting block and the blocking block are not easily lowered along with the sampling tube under the limiting action of the mounting block. Until the sampling tube descends to the bottommost position, the opening and closing block presses against the mounting block and slides, so that the mounting block unlocks the limiting block and the blocking block, thereby realizing the top side of the sampling tube. Description of the Drawings

[0030] Figure 1 is the overall structural schematic diagram of a sewage concentration detection system in an embodiment of the present application; Figure 2 is the connection structural schematic diagram of the truss and the sampling tube; Figure 3 is the connection structural schematic diagram of the sampling tube in the initial state; Figure 4 is the connection structural schematic diagram of the sampling tube in the initial state from another perspective; Figure 5 is the connection structural schematic diagram of the limiting block and the mounting block when the sampling tube finishes sampling; Figure 6 is the connection structural schematic diagram of the sampling tube in the state after sampling is completed.

[0031] Reference numerals: 1, sewage tank; 11, sludge scraper; 12, truss; 13, sampling tube; 14, power component; 2, adjustment component; 21, bracket; 22, pressing wheel; 23, adjustment gear; 24, synchronous gear; 25, transmission chain; 26, sliding gear; 27, sliding rack; 28, column; 3, blocking component; 31, mounting frame; 32, blocking block; 33, blocking airbag; 34, air supply component; 341, air pump; 35, limiting component; 351, limiting block; 352, mounting block; 353, limiting groove; 354, opening and closing block; 355, opening and closing spring; 356, blocking spring; 4, liquid leakage port; 41, plug; 42, detection plate; 43, detection valve; 44, torsion spring; 45, opening and closing component; 451, connecting cylinder. Detailed Embodiment

[0032] The following is a further detailed description of the present application in conjunction with the attached Figure 1-6 drawings.

[0033] An embodiment of the present application discloses a sewage concentration detection system and a detection method. Refer to Figure 1 andFigure 2 , a sewage concentration detection system includes a sewage tank 1 and a sludge scraper 11 rotatably arranged in the sewage tank 1. The rotation center of the sludge scraper 11 coincides with the center of the sewage tank 1. The sewage tank 1 is a circular tank. In this application, the sludge scraper 11 is a single-arm rotary sludge scraper 11. The sludge scraper 11 includes a column 28 rotatably arranged at the center of the sewage tank 1 and a truss 12 connected to the column 28. A sampling pipe 13 is arranged on the truss 12 in a lifting manner. The top and bottom of the sampling pipe 13 are both open, and multiple groups of sampling pipes 13 are provided. The number of groups of sampling pipes 13 is determined according to the depth of the sewage tank 1. In this application, four groups of sampling pipes 13 are provided, and the four groups of sampling pipes 13 are arranged at intervals along the length direction of the truss 12.

[0034] Moreover, the four groups of sampling pipes 13 are evenly arranged at intervals along the length direction of the truss 12, and the lengths of the four groups of sampling pipes 13 are inconsistent. The lengths of the four groups of sampling pipes 13 gradually increase in the direction from the position close to the column 28 to the position far from the column 28 along the length direction of the truss 12. The depths at which the four groups of sampling pipes 13 extend into the sewage tank 1 are inconsistent, and an adjustment component 2 for accurately sampling the sewage at different depths is also provided on the truss 12.

[0035] Refer to Figure 2 and Figure 3 , the adjustment component 2 includes a bracket 21 slidably arranged on the truss 12. An installation hole for the sampling pipe 13 to slide through is opened on the bracket 21. Four installation holes are opened, and the four installation holes correspond to the four sampling pipes 13 one by one. Four groups of pressing wheels 22 are rotatably connected to the bracket 21, and the four groups of pressing wheels 22 correspond to the four sampling pipes 13 one by one. Each group of pressing wheels 22 includes two relatively arranged pressing wheels 22. The pressing wheels 22 are in contact with and press against the outer peripheral wall of the sampling pipe 13. The rotation speed of each group of pressing wheels 22 matches the length of the sampling pipe 13. When the length of the sampling pipe 13 is longer, the rotation speed of the corresponding pressing wheel 22 is faster, so as to enable the four sampling pipes 13 to reach the corresponding lowest limit positions synchronously.

[0036] In order to synchronize the four sampling pipes 13, Figure 2 and Figure 3 , the adjustment component 2 further includes an adjustment gear 23 arranged at the rotating shaft of the pressing wheel 22. In this application, the adjustment gear 23 is embedded in the bracket 21, so it is not shown in the figure. The adjustment gears 23 corresponding to the two pressing wheels 22 in the same group are meshed with each other. In order to further realize the synchronous adjustment operation of the four sampling pipes 13, a synchronous gear 24 is coaxially and fixedly connected to the axis of any one of the pressing wheels 22 in each group of pressing wheels 22, and a transmission chain 25 is connected between the multiple synchronous gears 24.

[0037] Furthermore, in order to achieve stable synchronous lifting and lowering adjustment operations on the four sampling tubes 13, the diameters of the co-moving gears 24 corresponding to the four sampling tubes 13 are different. The longer the length of the sampling tube 13, the smaller the diameter of the corresponding co-moving gear 24, and thus the corresponding rotation speed is faster; the shorter the length of the sampling tube 13, the larger the diameter of the corresponding co-moving gear 24, and thus the corresponding rotation speed is faster, thereby achieving that the bottoms of the four sampling tubes 13 are flush in the initial state, and move to the position where the tops are flush within the same cycle for sampling.

[0038] At the same time, in order to realize the automatic lifting and lowering of the sampling tube 13 when the bracket 21 is lifted and lowered, and reduce the introduction of additional power sources, a sliding rack 27 is fixedly connected to the column 28, and the layout direction of the sliding rack 27 is consistent with the height direction of the column 28. A sliding gear 26 is rotatably connected to the bracket 21, and the rotating shaft of the sliding gear 26 is perpendicular to the height direction of the column 28. The sliding gear 26 is meshed with the sliding rack 27, and the sliding gear 26 and the synchronous gear are connected through the same transmission chain 25. In order to reflect the relationship between the technical features here, the protective shells set on the gears, racks, and transmission chains 25 are all hidden and displayed. In actual use, the protective shell can be set as needed to ensure stable transmission and meshing between the gears, racks, and chains.

[0039] In order to achieve stable sampling, the bracket 21 is also provided with a blocking member 3 for movably blocking the top of the sampling tube 13, as shown in FIG. Figure 4 and Figure 5 The sealing member 3 includes a mounting frame 31 fixed to the top of the bracket 21, and the mounting frame 31 is provided with a plurality of sealing blocks 32 on the top side of the sampling tube 13 for lifting and lowering. The sliding direction of the sealing blocks 32 is consistent with the height direction of the column 28, and the sealing blocks 32 correspond to the sampling tube 13 one by one, and a sealing airbag 33 is provided on the bottom side of the sealing block 32. The sealing airbag 33 is arranged in a ring shape, and the sealing airbag 33 is movably fitted with the inner circumferential wall of the sampling tube 13. The mounting frame 31 is also provided with an air supply member 34 for inflating and supplying air to the plurality of sealing airbags 33. In the present application, the air supply member 34 is a micro air pump 341, and the micro air pump 341 and the power member 14 are controlled by the same controller. When the controller controls the bracket 21 to descend to the lowest point, the micro air pump 341 inflates the sealing airbag 33; when the controller controls the bracket 21 to rise to the top, the micro air pump 341 draws air into the sealing airbag 33.

[0040] Meanwhile, in order to enable the plugging block 32 to automatically plug the top of the sampling tube 13, the plugging block 32 is elastically arranged on the mounting frame 31. A through hole for the plugging block 32 to slide through is formed on the mounting frame 31. A limiting block 351 is fixedly connected to the top end of the plugging block 32. The cross section of the limiting block 351 is rectangular. The limiting block 351 is arranged to slide through the through hole. A plugging spring 356 is fixedly connected to the limiting block 351. One end of the plugging spring 356 away from the limiting block 351 is fixedly connected to the mounting frame 31.

[0041] Meanwhile, if the plugging block 32 always plugs the top of the sampling tube 13, it is not easy to perform normal sampling operations on the sampling tube 13. Therefore, in order to plug the top of the sampling tube 13 after sampling is completed, so as to bring out the liquid in the sampling tube 13 through pressure, a limiting member 35 is also provided on the mounting frame 31. Refer to Figure 5 and Figure 6 , the limiting member 35 includes a mounting block 352 elastically and slidably arranged on the mounting frame 31. The sliding direction of the mounting block 352 is consistent with the length direction of the truss 12. A limiting groove 353 is formed on the side wall of the limiting block 351. The mounting block 352 is movably inserted into the limiting groove 353. One side of the limiting block 351 close to the top of the sampling tube 13 is inclined. The inclined side of the mounting block 352 is movably attached and pressed against the limiting block 351. The mounting block 352 is elastically arranged on the mounting frame 31. A closing spring 355 is fixedly connected to the mounting block 352. One end of the closing spring 355 away from the mounting block 352 is fixedly connected to the mounting frame 31. The closing spring 355 drives the mounting block 352 to be always inserted into the limiting groove 353 for arrangement.

[0042] Furthermore, in order to realize the sliding adjustment of the mounting block 352, a closing block 354 is provided on the side wall of the column 28. One end of the mounting block 352 protrudes from the side of the mounting frame 31 close to the column 28. The closing block 354 is attached to the movably protruding end of the mounting block 352. When the sampling tube 13 descends to the lowest point, at this time, the closing block 354 abuts against the mounting block 352, so that the mounting block 352 disengages from the limiting groove 353, and the plugging block 32 plugs the top of the sampling tube 13 under the elastic action of the plugging spring 356.

[0043] Meanwhile, since the lengths of the sampling tubes 13 and the depths of insertion into the sewage are different, when detecting the sewage concentration at different depths, in order to reduce the influence of the sewage volume on the results, a liquid leakage port 4 is formed on the side wall of the sampling tube 13. For each sampling tube 13, the height from the liquid leakage port 4 to the bottom end of the sampling tube 13 is the same. A plug 41 that can be opened movably is provided at the liquid leakage port 4. When all the sampling tubes 13 rise to the same bottom height, the plug 41 opens the liquid leakage port 4.

[0044] Meanwhile, in order to perform a liquid leakage operation to leave samples at different depths in the sampling tube 13 for concentration detection, a detection plate 42 for movably blocking the bottom side of the sampling tube 13 is further provided on the support 21. The detection plate 42 is rotatably connected to the support 21, and the rotation axis of the detection plate 42 is consistent with the extension direction of the truss 12. At the same time, a detection valve 43 is fixedly connected to the detection plate 42. The detection valve 43 is a common on-off valve that can be opened and closed. At the same time, a torsion spring 44 is provided at the rotation axis of the detection plate 42, and the bottom side of the sampling tube 13 is movably attached and pressed against the detection plate 42. At the same time, in order to realize the synchronous adjustment of the detection plate 42 and the plug 41, an opening and closing member 45 is further provided on the sampling tube 13. Refer to Figure 4 and Figure 5 , the opening and closing member 45 includes a connecting cylinder 451 slidably arranged on the sampling tube 13, and the plug 41 is fixed to the connecting cylinder 451. And one end of the connecting cylinder 451 close to the bottom of the sampling tube 13 protrudes from the sampling tube 13 movably, and the detection plate 42 is movably attached to the protruding end side of the connecting cylinder 451.

[0045] At the same time, in order to realize the automatic blocking operation of the bottom side of the sampling tube 13 by the detection plate 42, a pressing hole (not shown in the figure) is opened at the rotation axis of the detection plate 42. The arrangement form of the pressing hole is consistent with the arrangement form of the limiting groove 353. And a pressing block is elastically slidably arranged on the support 21. The arrangement form of the pressing block is consistent with the arrangement form of the mounting block 352. And one end of the pressing block also protrudes from the mounting frame 31. At the same time, a trigger block is fixedly connected to the column 28, and the trigger block is also movably attached to one end of the pressing block protruding from the mounting frame 31. It should be noted here that the projections of the trigger block and the opening and closing block 354 in the height direction are misaligned, that is, the opening and closing block 354 is misaligned with the pressing block, and the trigger block is misaligned with the mounting block 352.

[0046] Thus, during sampling, when the sampling tube 13 descends, the pressing detection plate 42 rotates, and the detection plate 42 is separated from the connecting cylinder 451, so that the connecting cylinder 451 slides under the action of gravity to block the liquid leakage port 4, thereby realizing subsequent accurate sampling.

[0047] When the sampling is completed and the sampling tube 13 rises to the topmost position, at this time, the detection plate 42 rotates towards the bottom of the sampling tube 13 until the detection plate 42 fits against the bottom end of the sampling tube 13. When the detection plate 42 rotates, it presses against the connecting cylinder 451, so that the connecting cylinder 451 slides upward until the liquid leakage port 4 is leaked, so that when the bottom of the sampling tube 13 is blocked, liquid leakage is automatically realized.

[0048] The embodiment of the present application also provides a sewage concentration detection method, including the following steps: S1, cleaning. Relevant technicians use a brush to clean the sampling tube 13 to make the inner wall of the sampling tube 13 free of attachments such as impurities and dirt; S2. Sampling. By controlling the sampling tube 13 to descend into the sewage tank 1 for sampling, each sampling tube 13 is synchronously lowered to the corresponding lowest position. At this time, the sampling tube 13 is filled with sewage at the same height as the sewage surface in the sewage tank 1 due to liquid pressure, and the top of the sampling tube 13 is blocked after the sampling tube 13 descends to the lowest position. S3. Sample control. By controlling the sampling tube 13 to rise, since the top of the sampling tube 13 is in a blocked state, under the action of pressure, the sampling tube 13 together with the sampled sewage is taken out until the sampling tube 13 rises to the corresponding highest height position. At this time, the bottom of the sampling tube 13 is blocked, and the top and side walls of the sampling tube 13 are opened until the liquid amounts remaining in the sampling tube 13 are the same. S4. Detection. Open the bottom of the sampling tube 13, transfer the liquid remaining in the sampling tube 13 to the detection equipment for detection, and compare the detection results in different sampling tubes 13 to judge the subsequent sewage treatment method in the sewage tank 1.

[0049] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A sewage concentration detection system, comprising a sewage tank (1) and a sludge scraper (11) rotatably arranged in the sewage tank (1), the sludge scraper (11) comprising a truss (12) consistent with the radial direction of the sewage tank (1), characterized in that: It includes a sampling tube (13) slidably arranged on the truss (12) and a power member (14) for driving the lifting of the sampling tube (13). There are multiple groups of the sampling tubes (13). Both ends of the sampling tube (13) are open. The depths at which multiple groups of the sampling tubes (13) extend into the sewage tank (1) are inconsistent. Multiple groups of the sampling tubes (13) are arranged at intervals. An adjusting assembly (2) for accurately sampling sewage at different depths by the sampling tube (13) is further arranged on the truss (12). The adjusting assembly (2) includes a bracket (21) slidably arranged on the truss (12). The power member (14) drives the lifting of the bracket (21). The sampling tube (13) is slidably arranged on the bracket (21). Tightening wheels (22) for clamping the sampling tube (13) are rotatably arranged on the bracket (21). There are multiple groups of the tightening wheels (22). Multiple groups of the tightening wheels (22) correspond to multiple groups of the sampling tubes (13) one by one. Each group of the tightening wheels (22) includes two relatively arranged tightening wheels (22), and the two tightening wheels (22) clamp the sampling tube (13). The lengths of adjacent sampling tubes (13) are inconsistent. The rotation speed of each group of the tightening wheels (22) is matched with the length of the sampling tube (13), that is, when the sampling tube (13) extends into the sewage tank (1), all the sampling tubes (13) reach the sampling position synchronously, and then subsequent sampling operations are carried out.

2. The sewage concentration detection system according to claim 1, characterized in that: The adjusting assembly (2) further includes adjusting gears (23) arranged at the rotating shafts of the tightening wheels (22). The adjusting gears (23) corresponding to the two tightening wheels (22) in the same group are meshed with each other. A synchronous moving gear (24) is further arranged at the axis of any one of the adjusting gears (23) in the same group on the bracket (21). The synchronous moving gears (24) corresponding to multiple groups of the tightening wheels (22) are connected by a transmission chain (25). The diameters of multiple groups of the synchronous moving gears (24) are arranged in inverse proportion to the lengths of the sampling tubes (13). When the length of the sampling tube (13) is the shortest, the diameter of the corresponding synchronous moving gear (24) is the largest.

3. A sewage concentration detection system according to claim 2, characterized in that: A sliding gear (26) is rotatably connected to the bracket (21). A support column (28) is arranged on the sludge scraper (11). The support column (28) is rotatably connected to the bottom wall of the sewage tank (1). The sliding gear (26) is in transmission connection with the synchronous moving gear (24). A sliding rack (27) is arranged on the support column (28). The sliding rack (27) is meshed with the sliding gear (26). A blocking member (3) for movably blocking the top of the sampling tube (13) is further arranged on the bracket (21).

4. The sewage concentration detection system according to claim 3, characterized in that: The plugging member (3) includes a mounting frame (31) disposed on the bracket (21). A plurality of plugging blocks (32) are arranged on the mounting frame (31) in a lifting manner. The plugging blocks (32) are movably attached to the end side of the sampling tube (13). A plugging airbag (33) is provided on the end side of the plugging block (32) corresponding to the sampling tube (13). A gas supply member (34) for inflating the plugging airbag (33) is provided on the mounting frame (31). When the plugging block (32) is attached to the end side of the sampling tube (13), the plugging airbag (33) is inflated and attached to the inner peripheral wall of the sampling tube (13). And a limiting member (35) for limiting the position of the plugging block (32) is further provided on the bracket (21).

5. The sewage concentration detection system according to claim 4, characterized in that: The plugging block (32) is elastically arranged on the mounting frame (31). The limiting member (35) includes a limiting block (351) provided on the plugging block (32) and a mounting block (352) elastically slidably arranged on the mounting frame (31). A limiting groove (353) is formed on the limiting block (351). The mounting block (352) is movably inserted into the limiting groove (353). An opening and closing block (354) is provided on the support column (28). One end of the mounting block (352) away from the limiting groove (353) is movably attached to the opening and closing block (354).

6. The sewage concentration detection system according to claim 5, characterized in that: A liquid leakage port (4) is formed on the sampling tube (13). The heights of the liquid leakage ports (4) on all the sampling tubes (13) from the liquid leakage ports (4) to the bottom side of the sampling tube (13) are the same. A plug (41) that can be opened and closed is provided at the liquid leakage port (4). When all the sampling tubes (13) rise to the same bottom height, the plug (41) opens the liquid leakage port (4). An opening and closing member for adjusting the plug (41) is further provided on the bracket (21).

7. The sewage concentration detection system according to claim 6, characterized in that: A detection plate (42) is rotatably arranged on the bracket (21). The detection plate (42) movably plugs the bottom side of the sampling tube (13). And a detection valve (43) for sewage to pass through is formed on the detection plate (42). A rotating member for rotating and adjusting the detection plate (42) is further provided on the bracket (21). When all the sampling tubes (13) rise to the same bottom height of the sampling tube (13), the rotating member drives the detection plate (42) to rotate to a position where it plugs the bottom of the sampling tube (13).

8. The sewage concentration detection system according to claim 7, characterized in that: The opening and closing member (45) includes a connecting cylinder (451) slidably arranged on the sampling tube (13). The sliding direction of the connecting cylinder (451) is consistent with the height direction of the sampling tube (13). And one end of the connecting cylinder (451) protrudes from the bottom side of the sampling tube (13). The other end of the connecting cylinder (451) movably plugs the liquid leakage port (4). The plug (41) is arranged on the connecting cylinder (451). The end side of the connecting cylinder (451) protruding from the sampling tube (13) is movably attached to the detection plate (42).

9. A sewage concentration detection method, based on the sewage concentration detection system according to any one of claims 1-8, characterized in that, Including the following steps: S1. Cleaning: The relevant technicians use a brush to clean the sampling tube (13) so that there are no attachments such as impurities and dirt on the inner wall of the sampling tube (13). S2. Sampling: By controlling the sampling tube (13) to descend into the sewage tank (1) for sampling, each sampling tube (13) is synchronously lowered to the corresponding lowest position. At this time, the sampling tube (13) is filled with sewage with a height consistent with the sewage level in the sewage tank (1) due to liquid pressure, and the top of the sampling tube (13) is blocked after the sampling tube (13) descends to the lowest position. S3. Sample control: By controlling the sampling tube (13) to rise, since the top of the sampling tube (13) is in a blocked state, under the action of pressure, the sampling tube (13) together with the sampled sewage is taken out until the sampling tube (13) rises to the corresponding highest height position. At this time, the bottom of the sampling tube (13) is blocked, and the top and side walls of the sampling tube (13) are opened until the liquid volume remaining in the sampling tube (13) is the same. S4. Detection: Open the bottom of the sampling tube (13), transfer the liquid remaining in the sampling tube (13) to the detection equipment for detection, and compare the detection results in different sampling tubes (13) to judge the subsequent sewage treatment method in the sewage tank (1).

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