Water quality monitoring device

Abstract

The utility model provides a water quality monitoring device which is integrally of a box-type structure, is placed at the position, where water quality needs to be monitored, in a system and comprises a box body, a box door capable of being opened and closed is arranged on the box body, a plurality of first through holes for water to pass through are formed in the side wall of the box body, a partition plate is arranged in the box body, and a second through hole is formed in the partition plate. A plurality of groups of mutually independent brackets used for hanging corrosion couplings are fixed on the partition plate, the corrosion couplings are detachably arranged on the brackets, and a magnet is arranged in the box body below the partition plate. According to the water quality monitoring device provided by the utility model, the corrosion coupon is simple to disassemble and is not easy to wash away by water, and the monitoring device can be taken out from equipment or a pipeline through simple operation.

Description

Technical Field

[0001] The utility model belongs to the field of sewage monitoring, and particularly relates to a water quality monitoring device. Background Art

[0002] With the booming development of China's industry, the amount of wastewater difficult to treat by enterprises has increased. Many enterprises have unstable processes and complex working conditions, and need to monitor the water quality in real time. If sudden water quality fluctuations occur and the causes cannot be found, it will have a serious impact on the enterprises. When using a water quality monitoring device to monitor the water quality, a corrosion coupon is generally set in the water quality monitoring device. A corrosion coupon is a standard metal specimen used to determine and evaluate the corrosion state. By placing the pre-treated and weighed metal specimen in the test system for a period of time, and then taking it out for observation, cleaning and weighing to determine the corrosion weight loss degree and corrosion type of the metal. The corrosion coupon method is one of the most widely used methods in monitoring, and the authenticity of its data directly affects the relevant research results and the applicability of anti-corrosion measures. The existing water quality monitoring devices are difficult to take out from the equipment, the disassembly and assembly of the monitoring device are cumbersome, the corrosion coupon is simply suspended in the monitoring device without any other fixing settings, and the corrosion coupon is extremely easy to be washed away by water, resulting in the loss of monitoring data, affecting the continuity and integrity of the data, and it is impossible to obtain the water quality situation in time, resulting in serious corrosion of pipelines, valves or equipment, bringing losses to production enterprises. Content of the Utility Model

[0003] Aiming at the problems existing in the prior art, the utility model provides a water quality monitoring device, the corrosion coupon is simple to disassemble and is not easily washed away by water, and the monitoring device can be taken out from the equipment or pipeline with simple operation.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A water quality monitoring device, the whole of which is of a box structure and is placed at a position in the system where the water quality needs to be monitored. It includes a box body, the box body is provided with an openable and closable box door, a plurality of first through holes for water to pass through are opened on the side wall of the box body, a partition board is arranged in the box body, a second through hole is opened on the partition board, and a plurality of groups of brackets which are independent of each other and used for hanging corrosion coupons are fixed on the partition board. The corrosion coupon is detachably arranged on the bracket, and a magnet is arranged inside the box body below the partition board.

[0006] Furthermore, each group of brackets includes two support pieces arranged in parallel at intervals. A third through hole is formed at the top end of each support piece, and the two third through holes are coaxial. The bottom end of the support piece is connected to a fixing plate. Below the fixing plate, there are two oppositely arranged buckles that are inserted into the second through holes. Each buckle includes a clamping arm connected to the fixing plate and a clamping block arranged at one end of the clamping arm. The clamping block is arranged at the end of the clamping arm far from the fixing plate. The clamping block is a half inverted cone shape with a larger top and a smaller bottom. A stepped surface is formed at the top end of the clamping block, and an arc surface is formed below the stepped surface. The length of the clamping arm is the same as the thickness of the partition. When the bracket is fixedly connected to the partition, press the fixing plate downward, and the clamping block gradually enters the second through hole along the arc surface. Since the clamping block has a shape with a larger top and a smaller bottom, the clamping arms of the two buckles approach each other. When the clamping block completely passes through the second through hole, the clamping arms move away from each other, and the stepped surface of the clamping block abuts against the bottom surface of the partition to fix the bracket on the partition. At least three groups of brackets are arranged on the partition, preferably four or eight groups of brackets. Each group of brackets is provided with a number. The material of the support piece can be, for example, stainless steel.

[0007] Furthermore, a threaded rod passes through the third through holes in the two support pieces of the same group. One end of the threaded rod bulges to prevent the threaded rod from passing through the support piece, and the other end is screwed with a nut. After the threaded rod passes through the two third through holes, it is tightened with a nut. The diameter of the threaded rod can be, for example, 1.5 - 3.5 mm, preferably about 2 mm.

[0008] Furthermore, a fourth through hole is formed at the top end of the corrosion coupon. The corrosion coupon is suspended on the threaded rod between the two support pieces of the same group through the fourth through hole. The corrosion coupon is provided with a number, and the number of the corrosion coupon corresponds one by one to the number of the bracket, preventing the corrosion coupon from not being able to correspond to the bracket it is on after falling off. Multiple corrosion coupons are provided for making parallel samples. The material of the corrosion coupon is carbon steel, with a fast corrosion rate and can be used for rapid monitoring. The length of the corrosion coupon can be, for example, 80 - 100 mm, the width is 10 - 30 mm, and the thickness is 3 - 6 mm. The diameter of the fourth through hole can be, for example, 2 - 5 mm, preferably about 3 mm. Place the corrosion coupon between the two support pieces, with the third through hole and the fourth through hole coaxial. The threaded rod passes through the third through hole and the fourth through hole in sequence, and the nut is screwed into the threaded rod and tightened to suspend the corrosion coupon on the threaded rod. When it is necessary to disassemble the corrosion coupon, hold the corrosion coupon, loosen and remove the nut, and the threaded rod withdraws from the third through hole and the fourth through hole to remove the corrosion coupon. If the corrosion coupon falls off the threaded rod and sinks onto the partition, the magnet below the partition attracts the corrosion coupon to further prevent the corrosion coupon from being washed away by the water flow.

[0009] Furthermore, the first through-holes are distributed over the side walls of the box body. The first through-holes can be, for example, circular holes. Water flows into the interior of the box body through the first through-holes. The diameter of the first through-holes is smaller than the width of the corrosion coupon to prevent the corrosion coupon from flushing out of the box body through the first through-holes after falling off. The diameter of the first through-holes can be, for example, 2 - 10 mm, preferably about 5 mm.

[0010] Furthermore, the periphery of the partition is fixedly connected to the inner wall of the box body. The shape of the partition is consistent with the shape of the cross-section of the box body. The material of the partition can be, for example, polytetrafluoroethylene.

[0011] Furthermore, there are multiple second through-holes covering the entire partition. The diameter of the second through-holes is smaller than the width of the corrosion coupon, for example, 2 - 5 mm smaller, preferably about 3 mm, to prevent the corrosion coupon from falling into the space below the partition. Second through-holes are provided on the partition to prevent the water flow above the partition from forming vortices, enabling the water flow to pass through the monitoring device at a uniform speed, contributing to the stability of the water body flow above the partition, and avoiding differences between parallel corrosion coupon samples.

[0012] Furthermore, there are multiple magnets. One magnet is respectively arranged below each group of brackets. The center of the magnet is set directly below the corresponding corrosion coupon. The magnet can be, for example, a permanent magnet. The top surface of the magnet is a curved surface, and the bottom surface is fixed to the inner bottom surface of the box body. The magnet can be any one of magnets such as ferrite magnets, neodymium iron boron magnets, or alnico magnets, preferably a strong magnet. The top surface of the magnet being set as an arc-shaped surface helps to disperse the water flow pressure, reduce the hydraulic impact, stabilize the water flow above the partition, and avoid the influence of the water flow on the corrosion coupon.

[0013] Furthermore, the box door is arranged on the top of the box body. The box door is rotatably connected to the box body, for example, through hinges or pivots. A locking structure is provided between the openable side of the box door and the box body to prevent the water from flushing open the box door. The locking structure adopts, for example, techniques well-known to those skilled in the art.

[0014] Furthermore, the box body can be, for example, a cuboid, a cube, or a shape with a square body on the upper part and a spherical body on the lower part or a shape with a square body on the upper part and a semi-cylindrical body on the lower part. The material of the box body can be corrosion-resistant polytetrafluoroethylene. The shape of the bottom surface of the box body is adapted to the shape of the bottom surface of the position where the water quality needs to be monitored. For example, when the water quality in a pipeline needs to be monitored, the upper part of the box body is a square body and the lower part is a semi-cylindrical body; when the water quality in a pool needs to be monitored, the box body is a cuboid or a cube, increasing the contact area, enabling the box body to fit with the equipment or pipeline or pool under the action of the magnetic attraction force of the magnet, and enhancing the stability of the box body.

[0015] Furthermore, the water quality monitoring device is placed at positions such as water tanks, pipelines, or equipment that require water quality monitoring. The side walls of the water tank, pipeline, or equipment may contain magnetic materials to ensure that the box body can be fixed inside the water tank, pipeline, or equipment under the action of the magnetic attraction force. Water flows into the box body through the first through hole and contacts the corrosion coupon.

[0016] Advantages of the present utility model:

[0017] A water quality monitoring device provided by the present utility model is connected to the position where water quality needs to be monitored through a magnet disposed below the partition. When the monitoring device needs to be taken out, the monitoring device is taken out by overcoming the magnetic attraction force, and the usage method is simple; through the threaded rod disposed on the bracket, the corrosion coupon is suspended on the threaded rod, and the corrosion coupon can be removed by removing the nut, without complex operations, and the corrosion coupon is not easily detached; a partition is provided inside the box body. Even if the corrosion coupon falls off, it sinks onto the partition and is attracted by the magnet, preventing the corrosion coupon from being washed away and ensuring the continuity of data; the corrosion coupon is made of carbon steel material, with a fast corrosion rate, facilitating rapid monitoring and calculating the corrosion rate. The water quality monitoring device provided by the present utility model can be applied to various processes and technologies, for long-term monitoring, establishing a database, dealing with various process problems, and playing a warning role. Description of the drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of a water quality monitoring device of the present utility model.

[0019] Figure 2 It is a schematic diagram of the internal structure of the box body.

[0020] Figure 3 It is a schematic diagram of the connection between the bracket and the corrosion coupon.

[0021] Figure 4 It is a schematic diagram of the structure of the bracket.

[0022] Figure 5 It is a sectional perspective view of the magnet.

[0023] Figure 6 It is a schematic diagram of the structure of the corrosion coupon.

[0024] Reference numerals:

[0025] 1 - box body, 2 - box door, 3 - first through hole, 4 - partition, 5 - second through hole, 6 - corrosion coupon, 601 - fourth through hole, 7 - bracket, 701 - support piece, 702 - third through hole, 703 - fixing plate, 8 - magnet, 9 - buckle, 901 - clamping arm, 902 - clamping block, 9021 - step surface, 9022 - arc surface, 10 - threaded rod, 11 - nut. Detailed implementation manners

[0026] The present utility model will be further described below in conjunction with the accompanying drawings.

[0027] As Figure 1-6 shown, a water quality monitoring device of the present utility model has an overall box structure and is placed at a position in the system where the water quality needs to be monitored. It includes a box body 1, the box body 1 is provided with an openable and closable box door 2, the side wall of the box body 1 is provided with a plurality of first through holes 3 for water to pass through, a partition 4 is arranged inside the box body 1, the partition 4 is provided with a second through hole 5, a plurality of groups of brackets 7 that are independent of each other and used for hanging corrosion coupons 6 are fixed on the partition 4, the corrosion coupons 6 are detachably arranged on the brackets 7, and a magnet 8 is arranged inside the box body 1 below the partition 4.

[0028] Each group of brackets 7 includes two support pieces 701 arranged in parallel at intervals. A third through hole 702 is opened at the top end of each support piece 701, and the two third through holes 702 are coaxial. The bottom end of the support piece 701 is connected to a fixing plate 703. Below the fixing plate 703, two oppositely arranged buckles 9 that are clamped into the second through hole 5 are provided. The buckle 9 includes a clamping arm 901 connected to the fixing plate 703 and a clamping block 902 arranged at one end of the clamping arm 901. The clamping arm 901 and the clamping block 902 are integrally formed, for example. The clamping block 902 is arranged at the end of the clamping arm 901 away from the fixing plate 703. The clamping block 902 is a semi-inverted cone shape with a larger upper part and a smaller lower part. A step surface 9021 is formed at the top end of the clamping block 902, and an arc surface 9022 is formed below the step surface 9021. The length of the clamping arm 901 is the same as the thickness of the partition 4. When the bracket 7 is fixedly connected to the partition 4, the fixing plate 703 is pressed downward, and the clamping block 902 gradually enters the second through hole 5 along the arc surface 9022. Since the clamping block 902 has a shape with a larger upper part and a smaller lower part, the clamping arms 901 of the two buckles 9 approach each other. When the clamping block 902 completely passes through the second through hole 5, the clamping arms 901 move away from each other, and the step surface 9021 of the clamping block 902 abuts against the bottom surface of the partition 4 to fix the bracket 7 on the partition 4. At least three groups of brackets 7 are arranged on the partition 4, and it is preferably to arrange four groups or eight groups of brackets. Each group of brackets 7 is provided with a number. The material of the support piece 701 can be stainless steel, for example.

[0029] A threaded rod 10 penetrates through the third through holes 702 of the two support pieces 701 in the same group. One end of the threaded rod 10 is enlarged to prevent the threaded rod 10 from passing through the support piece 701, and the other end is screwed with a nut 11. After the threaded rod 10 penetrates through the two third through holes 702, the nut 11 is tightened. The diameter of the threaded rod 10 can be 1.5 - 3.5 mm, for example, and is preferably about 2 mm.

[0030] The top end of the corrosion coupon 6 is provided with a fourth through hole 601. The corrosion coupon 6 is suspended on the threaded rod 10 between two support pieces 701 in the same group through the fourth through hole 601. The corrosion coupon 6 is provided with a number, and the number of the corrosion coupon 6 corresponds one by one to the number of the bracket 7, preventing the corrosion coupon 6 from not corresponding to the bracket 7 where it is located after falling off. Multiple corrosion coupons 6 are provided for making parallel samples. The material of the corrosion coupon 6 is carbon steel, with a fast corrosion rate, which can be used for rapid monitoring. The length of the corrosion coupon 6 can be, for example, 80 - 100 mm, the width is 10 - 30 mm, and the thickness is 3 - 6 mm. The diameter of the fourth through hole 601 can be, for example, 2 - 5 mm, preferably about 3 mm. Place the corrosion coupon 6 between two support pieces 701. The third through hole 702 and the fourth through hole 601 are coaxial. The threaded rod 10 passes through the third through hole 702 and the fourth through hole 601 in sequence, and the nut 11 is screwed into the threaded rod 10 and tightened to suspend the corrosion coupon 6 on the threaded rod 10. When it is necessary to disassemble the corrosion coupon 6, hold the corrosion coupon 6, loosen and remove the nut 11, and the threaded rod 10 withdraws from the third through hole 702 and the fourth through hole 601 to remove the corrosion coupon 6. If the corrosion coupon 6 falls off the threaded rod 10 and sinks on the partition 4, the magnet 8 below the partition 4 attracts the corrosion coupon 6, further preventing the corrosion coupon 6 from being washed away by the water flow.

[0031] The first through holes 3 are distributed throughout the side wall of the box body 1. The first through holes 3 can be, for example, circular holes. Water flows into the interior of the box body 1 through the first through holes 3. The diameter of the first through holes 3 is smaller than the width of the corrosion coupon 6, preventing the corrosion coupon 6 from flushing out of the box body 1 through the first through holes 3 after falling off. The diameter of the first through holes 3 can be, for example, 2 - 10 mm, preferably about 5 mm.

[0032] The periphery of the partition 4 is fixedly connected to the inner wall of the box body 1. The shape of the partition 4 is consistent with the shape of the cross-section of the box body 1. The material of the partition 4 can be, for example, polytetrafluoroethylene.

[0033] The second through holes 5 are multiple and cover the entire partition 4. The diameter of the second through holes 5 is smaller than the width of the corrosion coupon 6, for example, 2 - 5 mm smaller, preferably about 3 mm, preventing the corrosion coupon 6 from falling into the space below the partition 4. The second through holes 5 are provided on the partition 4 to avoid the formation of vortices in the water flow above the partition 4, making the water flow through the monitoring device evenly, contributing to the stability of the water body flow above the partition 4, and avoiding the differences between parallel samples of the corrosion coupon 6.

[0034] There are multiple magnets 8. The magnets 8 can be, for example, permanent magnets. The top surface of the magnet 8 is a curved surface, and the bottom surface is fixed inside the box body 1. The magnet 8 can be any one of ferrite magnets, neodymium iron boron magnets, or alnico magnets, etc., preferably a strong magnet. The top surface of the magnet 8 being set as a curved surface helps to disperse the water flow pressure, reduce the hydraulic impact, stabilize the water flow above the partition 4, and avoid the influence of the water flow on the corrosion coupon 6.

[0035] The magnet 8 is distributed and arranged below each corresponding group of brackets 7. For example, when four groups of brackets 7 are arranged, one magnet 8 is respectively arranged below each group of brackets 7, and it is ensured that the center of the magnet 8 is arranged directly below the corresponding corrosion coupon 6, so as to ensure that under the magnetic force of the magnet 8, the corrosion coupon 6 can still maintain an upright state in the middle, so as to fully withstand the action of water flow and achieve the expected corrosion test purpose.

[0036] The box door 2 is arranged on the top of the box body 1, and the box door 2 is rotatably connected to the box body 1, for example, by a hinge or a pivot. A locking structure is arranged between the openable side of the box door 2 and the box body 1 to prevent the water from flushing open the box door 2. The locking structure adopts, for example, a technique well-known to those skilled in the art.

[0037] The box body 1 can be, for example, a cuboid, a cube, or a shape with a square upper part and a spherical lower part or a square upper part and a semi-cylindrical lower part. The material of the box body 1 can be, for example, corrosion-resistant polytetrafluoroethylene. The bottom shape of the box body 1 is adapted to the bottom shape of the position where the water quality needs to be monitored. For example, when the water quality in a pipeline needs to be monitored, the upper part of the box body 1 is a square and the lower part is a semi-cylinder; when the water quality in a pool needs to be monitored, the box body 1 is a cuboid or a cube, increasing the contact area, so that the box body 1 fits with the equipment, pipeline or pool under the action of the attraction of the magnet 8, enhancing the stability of the box body 1.

[0038] The water quality monitoring device is placed at a position where the water quality needs to be monitored, such as in a pool, a pipeline or equipment. The side wall of the pool, pipeline or equipment may contain magnetic materials to ensure that the box body 1 can be fixed inside the pool, pipeline or equipment under the action of the attraction of the magnet 8, and the water flows into the box body 1 through the first through hole 3 and contacts the corrosion coupon 6. Embodiment

[0039] A method for using a water quality monitoring device of the present utility model:

[0040] The power system of a certain enterprise uses coal burning for boiler heating. The coal contains a large amount of acidic substances such as sulfur and phosphorus, which cannot be discharged directly and need to be treated by a desulfurization device. After the desulfurization device is treated, a large amount of desulfurization slurry is discharged, and then further sewage treatment is carried out. The water quality monitoring device of the utility model is used, four sets of brackets 7 are set, and correspondingly, there are four corrosion hanging pieces 6, and four parallel samples are made. The water quality monitoring device of the utility model is placed at the outlet of the desulfurization slurry, and the sewage floods the box 1. The box 1 is filled with flowing sewage. Monitoring is carried out every week, and the placement time each time is 1 week. The box door 2 is opened, Remove the corrosion hanger 6, calculate the loss mass according to the mass difference before and after the corrosion hanger 6, take the average value to judge the corrosion rate, and establish long-term monitoring data. If the desulfurization device operates normally, the monitored corrosion rate of the corrosion hanger 6 will be stable in a certain range. If an abnormality occurs suddenly, the processing capacity of the desulfurization device will be weakened, and the staff will not find it in time, resulting in disorder in other sections of the back-end sewage treatment. At this time, the monitored corrosion rate data will be too large. At this time, the problem can be found from the front section where the water quality monitoring device of the utility model is placed, and it will be immediately found that the desulfurization device is operating abnormally, so as to carry out rectification and maintenance.

[0041] The utility model provides a water quality monitoring device which is applied to various work sections and processes, for example: circulating water system, sewage system, secondary water system, and even to the drainage pipe of a workshop and the water seal device of a certain equipment. In case of sudden abnormal water quality or even process abnormality, the problem can be quickly found out based on the monitoring data of a certain work section. At the same time, it can also be reversely inferred that the corrosion rate monitoring data of a certain work section is abnormal. It can be inferred that the process of the current work section is fluctuating or there is a problem, and timely rectification, long-term monitoring, and establishment of a database can be used to deal with various process problems and play an early warning role.

[0042] The above describes the preferred embodiments of the present invention, however, the above description is not intended to be limiting. A person skilled in the art may make many changes or modifications to the present invention without departing from the spirit and scope of the present invention. The changes or modifications should be included in the scope of the appended claims.

Claims

1. A water quality monitoring device, characterized in that, It is of a box structure as a whole and is placed at the position in the system where the water quality needs to be monitored. It includes a box body (1), the box body (1) is provided with an openable and closable box door (2), a plurality of first through holes (3) for water to pass through are formed in the side wall of the box body (1), a partition board (4) is arranged in the box body (1), a second through hole (5) is formed in the partition board (4), and a plurality of groups of brackets (7) which are independent of each other and used for hanging corrosion coupons (6) are fixed on the partition board (4). The corrosion coupons (6) are detachably arranged on the brackets (7), and a magnet (8) is arranged inside the box body (1) below the partition board (4).

2. The water quality monitoring device according to claim 1, characterized in that, Each group of brackets (7) includes two support pieces (701) arranged in parallel at intervals. A third through hole (702) is formed at the top end of each support piece (701). The two third through holes (702) are coaxial. The bottom end of the support piece (701) is connected to a fixing plate (703). Two buckles (9) which are arranged oppositely and are clamped into the second through hole (5) are arranged below the fixing plate (703). The buckle (9) includes a clamping arm (901) connected to the fixing plate (703) and a clamping block (902) arranged at one end of the clamping arm (901). The clamping block (902) is arranged at the end of the clamping arm (901) far away from the fixing plate (703). The clamping block (902) is a half inverted cone body with a larger upper part and a smaller lower part. A step surface (9021) is formed at the top end of the clamping block (902), and an arc surface (9022) is formed below the step surface (9021). The length of the clamping arm (901) is the same as the thickness of the partition board (4).

3. The water quality monitoring device according to claim 2, wherein A threaded rod (10) penetrates through the third through holes (702) of the two support pieces (701) in the same group. One end of the threaded rod (10) is enlarged, and a nut (11) is screwed on the other end.

4. The water quality monitoring device according to claim 3, characterized in that, A fourth through hole (601) is formed at the top end of the corrosion coupon (6). The corrosion coupon (6) is hung on the threaded rod (10) between the two support pieces (701) in the same group through the fourth through hole (601). Numbers are arranged on the corrosion coupon (6). The numbers of the corrosion coupons (6) correspond to the numbers of the brackets (7) one by one. A plurality of corrosion coupons (6) are arranged for making parallel samples. The material of the corrosion coupon (6) is carbon steel.

5. The water quality monitoring device according to claim 1, characterized in that, The first through holes (3) are distributed all over the side wall of the box body (1). The diameter of the first through hole (3) is smaller than the width of the corrosion coupon (6).

6. The water quality monitoring device according to claim 1, characterized in that, The periphery of the partition board (4) is fixedly connected to the inner wall of the box body (1). The shape of the partition board (4) is the same as the shape of the cross section of the box body (1). The material of the partition board (4) is polytetrafluoroethylene.

7. The water quality monitoring device according to claim 1, characterized in that, There are a plurality of second through holes (5) which cover the whole partition board (4). The diameter of the second through hole (5) is smaller than the width of the corrosion coupon (6).

8. The water quality monitoring device according to claim 1, characterized in that, A plurality of the magnets (8) are provided. One magnet (8) is arranged below each group of brackets (7). The center of the magnet (8) is arranged directly below the corresponding corrosion coupon (6). The magnet (8) is a permanent magnet. The top surface of the magnet (8) is a curved surface, and the bottom surface is fixed on the inner bottom surface of the box body (1).

9. The water quality monitoring device according to claim 1, characterized in that, The box door (2) is arranged on the top of the box body (1). The box door (2) is rotatably connected to the box body (1). A locking structure is arranged between the openable and closable side of the box door (2) and the box body (1).

10. The water quality monitoring device according to any one of claims 1-9, characterized in that, The box body (1) is a cuboid or a cube, or has a square body at the upper part and a spherical body at the lower part, or has a square body at the upper part and a semi-cylindrical body at the lower part. The material of the box body (1) is polytetrafluoroethylene, and the bottom shape of the box body (1) is adapted to the bottom shape of the position where the water quality needs to be monitored.

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