A water pollutant monitoring device

Abstract

The present invention belongs to the field of water quality sample collection equipment, specifically a water pollutant monitoring device, including a shell; four slide cylinders are fixedly connected to the outer side wall of the shell, and the four slide cylinders are evenly distributed on the outer side wall of the shell; the four slide cylinders are slidably connected to the inside of the four slide cylinders; a sampling component is installed at the bottom of the support rod; the sampling component is used to collect hydrological samples; a moving component is installed on the top of the support rod; the moving component is used to move the device; the water quality in a well may be too poor due to too few samples collected at the same time, and the device is sent into the well through the moving component, and continues to go deeper until it contacts the well water. Then the four collection components can sample water at four different positions in the well at the same time. By collecting and analyzing multiple groups of samples, accurate results of the water quality in the well can be obtained, which better guarantees the use of water by residents in life and production, and realizes the monitoring of the well at the same time.

Description

Technical Field

[0001] The invention belongs to the field of water quality sample collection equipment, in particular to a water pollutant monitoring device. Background Art

[0002] With the development of industry, some pollutants will inevitably be discharged during industrial production. Some pollutants will invade the surface and affect groundwater resources. In order to monitor groundwater resources, it is necessary to collect and analyze groundwater resources and use data to determine the pollutant content in groundwater.

[0003] Due to the scarcity of surface water resources in most rural areas in the west, people usually collect rainwater for daily use. However, after the rainwater is collected, it will breed a lot of bacteria and become turbid after being left, making it unable to support residents' daily use. Therefore, people dig wells and use groundwater to meet their living and production needs. Since the western region is in an arid area, the depth of the wells is very deep when digging wells to find groundwater, and it is difficult to detect the water quality. In addition, the groundwater is flowing, and the impurity content in the water is different. As a result, when taking samples of the well water quality, the water quality in a well may be inaccurate because too few samples are collected at the same time.

[0004] In order to increase the number of groundwater samples collected at the same time, the present invention provides a water pollutant monitoring device. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: a water pollutant monitoring device according to the present invention comprises a housing; four slide cylinders are fixedly connected to the outer side wall of the housing, and the four slide cylinders are evenly distributed on the outer side wall of the housing;

[0007] The four slides are all slidably connected to support rods; a sampling assembly is installed at the bottom of the support rods; the sampling assembly is used to collect hydrological samples; a moving assembly is installed at the top of the support rods; the moving assembly is used to move the device.

[0008] Preferably, the moving assembly includes a No. 1 connecting rod; the tops of the four support rods are all fixedly connected to the No. 1 connecting rod; the tops of the four No. 1 connecting rods are all fixedly connected to a fixing plate; and the top of the fixing plate is fixedly connected to a rope.

[0009] Preferably, an anti-collision component is installed on the side wall of the slide; the anti-collision component includes a slide rod; the slide rod is installed on the side wall of the slide, and the slide rod is perpendicular to the slide; a movable rod is installed on the end of the slide rod away from the slide; a pulley is installed on the end of the movable rod away from the slide.

[0010] Preferably, the slide cylinder, support rod and shell are all provided with slide grooves corresponding to the slide rod, and the slide rod is slidably connected in the slide groove; a limiting rod is fixed inside the support rod, and the slide rod is provided with a limiting groove corresponding to the limiting rod; the limiting groove is arranged at an angle.

[0011] Preferably, the sampling assembly includes a sampling box; the sampling box is installed at the bottom of the support rod; a collection hole is opened at the bottom of the sampling box; a No. 2 connecting rod is fixedly connected to the center of the inner top surface of the sampling box; the bottom of the No. 2 connecting rod is slidably connected to a limit plate; a No. 2 spring is sleeved on the outer wall of the No. 2 connecting rod; the No. 2 spring is located between the limit plate and the inner top surface of the sampling box; the limit plate is located inside the sampling box.

[0012] Preferably, a plurality of air holes are opened at the center of the top of the sampling box, and the air holes run through the top of the sampling box; the plurality of air holes are evenly distributed in a ring shape around the second connecting rod; and an airway is opened at the bottom of the support rod corresponding to the plurality of air holes.

[0013] Preferably, an air groove is provided on the inner wall of the support rod, and the air groove passes through the surface of the inner wall of the support rod; a dustproof plate is fixed inside the air duct; a plurality of air holes are provided on the dustproof plate; the dustproof plate is tangent to the bottom wall of the air groove.

[0014] Preferably, the outer side of the No. 2 spring is covered with an insulating layer; the outer side walls of the four slides are fixed with two counterweights; the two counterweights are arranged opposite to the outer side walls of the slide; and the two counterweights are parallel to the support rod.

[0015] Preferably, a positioning ring is fixed to the top of the collection box; four clamping blocks are fixed to the top of the inner wall of the positioning ring; the four clamping blocks are evenly distributed on the inner wall of the positioning ring; the diameter of the positioning ring is smaller than the diameter of the support column; and a clamping groove is provided at the bottom of the support column corresponding to the positioning ring.

[0016] Preferably, the sliding rod is provided with a movable groove corresponding to the movable rod; the movable rod is slidably connected in the movable groove; a No. 1 spring is installed in the movable groove, and the No. 1 spring is located between the bottom wall of the movable groove and one end of the movable rod in the movable groove; a lifting shoulder is provided at one end of the movable rod located in the movable groove; the movable groove is provided with a protrusion corresponding to the lifting shoulder.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The water pollutant monitoring device described in the present invention is sent into a well by a mobile component and continues to go deeper until it contacts the well water. Then, four collection components can simultaneously sample water at four different locations in the well. By collecting and analyzing multiple groups of samples, accurate results of the water quality in the well can be obtained, which better guarantees the use of water in residents' daily life and production, and realizes the monitoring of the well at the same time.

[0019] When the water sample is collected, the water sample is collected, and the water sample is collected, and the device is taken out of the water sample collection process. The water sample is collected, and the water sample is collected, and the water sample is collected, and the device is taken out of the water sample collection process. The water sample is collected, and the water sample is collected, and the device is taken out of the water sample collection process. The water sample is collected, and the water sample is collected, and the device is taken out of the water sample collection process. The water sample is collected, and the water sample is collected, and the device is taken out of the water sample collection process BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 is a perspective view of the present invention;

[0022] Figure 2 is a front cross-sectional view of the present invention;

[0023] Figure 3 is a stereogram of the acquisition assembly of the present invention;

[0024] Figure 4 is a front cross-sectional view of the collection assembly of the present invention;

[0025] Figure 5 It is a front sectional view of embodiment 2 of the present invention.

[0026] In the figure: 1. Rope; 11. Fixed plate; 12. Connecting rod No. 1; 2. Shell; 21. Slide; 22. Support rod; 221. Limit rod; 222. Air duct; 223. Dustproof plate; 23. Counterweight; 24. Sliding rod; 25. Movable rod; 26. Pulley; 3. Collection box; 31. Connecting rod No. 2; 32. Spring No. 2; 33. Insulation layer; 34. Limit plate; 35. Positioning ring; 36. Block; 4. Spring No. 1. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] Example 1

[0029] like Figure 1 As shown, a water pollutant monitoring device according to an embodiment of the present invention includes a housing 2, a slide 21, a support rod 22, a sampling assembly, and a moving assembly; four slides 21 are fixedly connected to the outer side wall of the housing 2, and the four slides 21 are evenly distributed on the outer side wall of the housing 2;

[0030] The four slides 21 are all slidably connected to support rods 22; a sampling assembly is installed at the bottom of the support rods 22; the sampling assembly is used to collect hydrological samples; a moving assembly is installed on the top of the support rods 22; the moving assembly is used to move the device.

[0031] During operation, due to the shortage of surface water resources in most rural areas in the west, rainwater is usually collected for daily use. However, after the rainwater is collected, a lot of bacteria will breed and it will become turbid and cannot support residents' daily use. Therefore, people dig wells and use groundwater to meet their living and production needs. Since the western region is in an arid area, the depth of the well is very deep when digging wells to find groundwater, and it is difficult to detect the water quality. In addition, the groundwater is flowing and the impurity content in the water is different. As a result, when taking samples of the well water quality, the water quality in a well may be inaccurate due to too few samples collected at the same time. The device is sent into the well through the mobile component and continues to go deeper until it contacts the well water. Then, four collection components can sample water at four different positions in the well at the same time. By collecting and analyzing multiple groups of samples, accurate results of the water quality in the well can be obtained, which better guarantees the use of water by residents in their daily production and realizes the monitoring of the well at the same time.

[0032] like Figures 1 to 2 As shown, the moving assembly includes a No. 1 connecting rod 12, a fixed plate 11, and a rope 1; the tops of the four support rods 22 are all fixedly connected to the No. 1 connecting rod 12, and the No. 1 connecting rod 12 is arranged at an angle; the tops of the four No. 1 connecting rods 12 are all fixedly connected to the fixed plate 11; the top of the fixed plate 11 is fixedly connected to the rope 1.

[0033] During operation, due to the drought in the western region, surface water resources have been evaporated and groundwater is hidden deep underground, so the depth of the well is deep. In order to be able to put the device into the deep well and collect water samples, the device is sent into the deep well through the rope 1. In order to prevent the device from shaking when putting it in and out, causing the water quality sample to spill, the rope 1 is connected to the four support rods 22 through the fixed plate 11 and the No. 1 connecting rod 12, so that the weight of the device is shared, and the device can be well inserted into the well to collect water quality samples, and the stability of the device is improved when it goes deep into the well and leaves the well.

[0034] like Figures 1 to 2 As shown, an anti-collision component is installed on the side wall of the slide 21; the anti-collision component is used to protect the main body of the device from colliding with the well wall; the anti-collision component includes a slide bar 24, a movable bar 25, and a pulley 26; the slide bar 24 is installed on the side wall of the slide 21, and the slide bar 24 is perpendicular to the slide 21; the movable bar 25 is installed on the end of the slide 24 away from the slide 21; the pulley 26 is installed on the end of the movable bar 25 away from the slide 21.

[0035] During operation, since the water well is deep, when the device is put in and taken out, the device will collide with the side wall of the water well, which may cause the collection component to break, resulting in the inability to collect water quality samples. Therefore, by setting the sliding rod 24, the movable rod 25, and the pulley 26, the top width of the device is increased. During the movement of the device, the sliding rod 24, the movable rod 25, and the pulley 26 will first contact the well wall, avoiding contact friction between the collection component and the well wall, thereby protecting the integrity of the collection component and improving the service life of the device.

[0036] like Figures 1 to 2 As shown, the slide 21, the support rod 22, and the shell 2 are all provided with slide grooves corresponding to the slide rod 24, and the slide rod 24 is slidably connected in the slide groove; the support rod 22 is fixedly connected to the inside of the limit rod 22, and the slide rod 24 is provided with a limit groove corresponding to the limit rod 221; the limit groove is arranged at an angle, and the end of the limit groove close to the shell 2 is higher than the end of the limit groove away from the shell 2; the limit groove and the limit rod 221 are used to enable the slide rod 24 to slide outward.

[0037] During operation, when the device is sent into the water well through the rope 1, the rope 1 will pull the support rod 22 upward through the fixing plate 11 and the No. 1 connecting rod 12, and then the support rod 22 will slide upward in the slide cylinder 21. As the support rod 22 slides upward, the limiting rod 221 in the support rod 22 will also move upward, and the limiting rod 221 will slide in the limiting groove, so the limiting rod 221 will drive the slide rod 24 to slide outward, so that the four pulleys 26 can all fit on the well wall. After the device has collected the water quality sample, in order to prevent the device from shaking and causing the water quality sample to spill, when taking out the device, the rope 1 is pulled to pull the support rod 22 upward, thereby driving the sliding rod 24, the movable rod 25, and the pulley 26 to slide outward, so that the pulley 26 is in contact with the side wall of the well. When all four pulleys 26 are in contact with the side wall of the well, a supporting force is provided to the device, so that the device will not shake when moving, thereby preventing the water quality sample from spilling.

[0038] like Figures 1 to 4 As shown, the sampling assembly includes a sampling box, a No. 2 connecting rod 31, a No. 2 spring 32, and a limit plate 34; the sampling box is installed at the bottom of the support rod 22; a collection hole is opened at the bottom of the sampling box; a No. 2 connecting rod 31 is fixedly connected to the center of the inner top surface of the sampling box; the bottom of the No. 2 connecting rod 31 is slidably connected to the limit plate 34, and the No. 2 connecting rod 31 passes through the limit plate 34; the outer wall of the No. 2 connecting rod 31 is sleeved with a No. 2 spring 32; the No. 2 spring 32 is located between the limit plate 34 and the inner top surface of the sampling box; the limit plate 34 is located inside the sampling box, and the diameter of the limit plate 34 is larger than the diameter of the collection hole.

[0039] During operation, when the device comes into contact with well water, the collection box 3 will be completely pressed into the water under the action of the gravity of the device. At the same time, the pressure of the water will push the limit plate 34 upward, and then the water will enter the collection box 3. When the collection is completed, the rope 1 is pulled to lift the device upward, and then the limit plate 34 will close under the action of the water in the collection box 3 and the No. 2 spring 32, so that the water quality sample collection is completed, and the water quality sample is taken.

[0040] like Figures 1 to 4 As shown, a plurality of air holes are provided at the center of the top of the sampling box, and the air holes run through the top of the sampling box; the plurality of air holes are evenly distributed in a ring shape around the second connecting rod 31; an air channel 222 is provided at the bottom of the support rod 22 corresponding to the plurality of air holes; the air holes and the air channel 222 help to discharge gas when the sampling box 3 collects water quality samples.

[0041] During operation, when the collection box 3 collects water quality samples, water enters the collection box 3 from the collection hole at the bottom of the collection box 3. Since the collection box 3 is filled with air, if the air in the collection box 3 is not discharged, the pressure in the collection box 3 will be high and water cannot enter the collection box 3. Therefore, an air hole is opened at the top of the collection box 3. When water enters the collection box 3, the gas in the collection box 3 can be discharged from the top of the collection box 3. Moreover, when collecting water quality samples, the collection box 3 will enter the water completely. In order to prevent water from covering the air hole at the top of the collection box 3, the air hole is connected to the air channel 222 in the support column. The air channel 222 is much higher than the water surface, which can prevent water from covering the air hole at the top of the collection box 3, which helps water to enter the collection box 3 smoothly when collecting water quality.

[0042] like Figures 1 to 2 As shown, an air groove is provided on the inner wall of the support rod 22, and the air groove passes through the inner wall surface of the support rod 22; a dustproof plate 223 is fixedly connected to the inside of the air duct 222; a plurality of air holes are provided on the dustproof plate 223; the dustproof plate 223 is tangent to the bottom wall of the air groove; the dustproof plate 223 is used to prevent dust and particles from entering the collection box 3.

[0043] During operation, when the device collects water quality samples, the shell 2, the slide 21, and the slide rod 24 will press the support rod 22 downward, and the slide rod 24 will fit with the opening of the air channel 222 in the support column, causing the air channel 222 to be sealed, thereby affecting the discharge of gas in the collection box 3 when the collection box 3 collects water quality samples. Therefore, an air groove is opened at the opening of the air channel 222 in the support column, so that even when the slide rod 24 fits with the opening of the air channel 222 in the support column, the gas in the collection box 3 can be discharged through the air channel 222 and the air groove, and dust, particles and other impurities are prevented from entering the collection box 3 through the air channel 222 and affecting the data in the water quality sample. Therefore, a dustproof plate 223 is used to block dust, particles and other impurities.

[0044] like Figures 1 to 4 As shown, the outer side of the No. 2 spring 32 is covered with an insulating layer 33; the insulating layer 33 is used to prevent the No. 2 spring 32 from contacting the water sample in the collection box 3; the outer side walls of the four slides 21 are fixed with two counterweights 23; the two counterweights 23 are arranged opposite to the outer side walls of the slide 21; the two counterweights 23 are parallel to the support rod 22.

[0045] During operation, since the No. 2 spring 32 is arranged in the collection box 3, when collecting water quality samples, water enters the collection box 3 and will directly contact the No. 2 spring 32. After long-term use, the No. 2 spring 32 will rust, causing the elastic potential energy to weaken, and the rusted part will enter the water quality sample, contaminating the sample, which will cause deviations in the water quality analysis data. Therefore, an insulating layer 33 is provided on the surface of the No. 2 spring 32, so that the No. 2 spring 32 does not directly contact the water quality sample, thereby ensuring the elastic potential energy of the No. 2 spring 32 and not affecting the accuracy of the water quality analysis data. In order to improve the ability of the device to press the collection box 3 completely into the water when collecting water quality samples and increase the capacity of collecting samples, a counterweight block 23 is provided on the side wall of the slide 21 to increase the pressure on the collection box 3 so that the collection box 3 can completely enter the water.

[0046] like Figures 1 to 4 As shown, a positioning ring 35 is fixed to the top of the collection box 3; four clamping blocks 36 are fixed to the top of the inner wall of the positioning ring 35; the four clamping blocks 36 are evenly distributed on the inner wall of the positioning ring 35; the diameter of the positioning ring 35 is smaller than the diameter of the support column; a clamping groove is provided at the bottom of the support column corresponding to the positioning ring 35; the clamping block 36 is clamped in the clamping groove; the collection box 3 is clamped to the support column.

[0047] During operation, after the device collects water samples, the water samples in the collection box 3 need to be sent for monitoring and analysis. In order to prevent the water samples from being contaminated by the outside world during transportation, the collection box 3 is rotated, and the collection box 3 drives the positioning ring 35 and the block 36 to rotate at the bottom of the support column. The block 36 rotates in the clamping groove, and when the block 36 rotates to the notch, the collection box 3 can be directly removed from the bottom of the support rod 22.

[0048] Example 2

[0049] like Figure 5 As shown, compared with Example 1, another implementation of the present invention is: the sliding rod 24 is provided with a movable groove corresponding to the movable rod 25; the movable rod 25 is slidably connected in the movable groove; a No. 1 spring 4 is installed in the movable groove, and the No. 1 spring 4 is located between the bottom wall of the movable groove and one end of the movable rod 25 in the movable groove; a lifting shoulder is provided at one end of the movable rod 25 in the movable groove; the movable groove is provided with a protrusion corresponding to the lifting shoulder; the lifting shoulder and the protrusion can prevent the movable rod 25 from falling out of the movable groove.

[0050] During operation, due to the deep depth of the well, it is difficult to ensure the flatness of the well wall when the well wall is built and reinforced, and there will inevitably be some potholes. The pulley 26 on the anti-collision component of the device, supported by the slide bar 24 and the movable rod 25, rolls closely on the side wall of the well. When encountering a pothole on the well wall, the movable rod 25 will shrink inward, or extend outward under the action of the No. 1 spring 4, so that the device can rely on the support of the well wall to avoid strong shaking during movement. At the same time, if it encounters a pothole or bulge, it can pass through smoothly without hindering the movement of the device.

[0051] The working principle is that the device is sent into the well by the rope 1, and the rope 1 is connected to the four support rods 22 through the fixed plate 11 and the No. 1 connecting rod 12, so that the weight of the device is shared. When the device is put in and taken out, the device will collide with the side wall of the well. The sliding rod 24, the movable rod 25, and the pulley 26 increase the top width of the device. During the movement of the device, when the device is sent into the well by the rope 1, the rope 1 will pull the support rod 22 upward through the fixed plate 11 and the No. 1 connecting rod 12, and then the support rod 22 slides upward in the slide cylinder 21. At the same time as the support rod 22 slides upward, the limit rod 221 in the support rod 22 will also move upward, and the limit rod 221 slides in the limit groove, so the limit rod 221 will drive the slide rod 24 to slide outward, so that the four pulleys 26 can all fit on the well wall, avoiding the contact friction between the collection component and the well wall, and no shaking will occur. When the water enters the water collection box 3, the gas in the water collection box 3 can be discharged from the air holes and air passages 222 at the top of the water collection box 3. After the gas is discharged, the pressure inside the water collection box 3 becomes smaller and the pressure outside the water collection box 3 becomes larger, so that water can enter the water collection box 3 smoothly. After the water collection box 3 is filled with water, the pressure inside and outside the water collection box 3 is the same, but the No. 2 spring 32 in the water collection box 3 is squeezed when the water enters the water collection box 3. When the pressure inside and outside the water collection box 3 is the same, the No. 2 spring 32 pushes the limit plate 34 to reset and closes the collection hole at the bottom of the water collection box 3. At this time, the four collection components can simultaneously sample water at four different positions in the well.

[0052] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A water pollutant monitoring device, characterized in that: It comprises a shell (2); four slide cylinders (21) are fixedly connected to the outer side wall of the shell (2), and the four slide cylinders (21) are evenly distributed on the outer side wall of the shell (2); The four slide cylinders (21) are all slidably connected to support rods (22); a sampling assembly is installed at the bottom of the support rods (22); the sampling assembly is used to collect hydrological samples; a moving assembly is installed at the top of the support rods (22); the moving assembly is used to move the device; The side wall of the slide (21) is provided with an anti-collision assembly; the anti-collision assembly includes a slide bar (24); the slide bar (24) is provided on the side wall of the slide (21), and the slide bar (24) is perpendicular to the slide (21); a movable rod (25) is provided on one end of the slide bar (24) away from the slide (21); a pulley (26) is provided on one end of the movable rod (25) away from the slide (21); The slide cylinder (21), the support rod (22), and the housing (2) are all provided with slide grooves corresponding to the slide rod (24), and the slide rod (24) is slidably connected in the slide grooves; a limiting rod (221) is fixedly connected inside the support rod (22), and the slide rod (24) is provided with a limiting groove corresponding to the limiting rod (221); the limiting groove is arranged obliquely; The sampling assembly includes a collection box (3); the collection box (3) is installed at the bottom of the support rod (22); a collection hole is opened at the bottom of the collection box (3); a second connecting rod (31) is fixedly connected to the center of the inner top surface of the collection box (3); the bottom of the second connecting rod (31) is slidably connected to a limit plate (34); a second spring (32) is sleeved on the outer wall of the second connecting rod (31); the second spring (32) is located between the limit plate (34) and the inner top surface of the collection box (3); the limit plate (34) is located inside the collection box (3).

2. A water pollutant monitoring device according to claim 1, characterized in that: The moving assembly includes a No. 1 connecting rod (12); the tops of the four support rods (22) are all fixedly connected to the No. 1 connecting rod (12); the tops of the four No. 1 connecting rods (12) are all fixedly connected to a fixing plate (11); and the top of the fixing plate (11) is fixedly connected to a rope (1).

3. The water pollutant monitoring device according to claim 1, characterized in that: A plurality of air holes are provided at the center of the top of the collection box (3), and the air holes penetrate the top of the collection box (3); the plurality of air holes are evenly distributed in a ring shape around the second connecting rod (31); and an air channel (222) is provided at the bottom of the support rod (22) corresponding to the plurality of air holes.

4. A water pollutant monitoring device according to claim 3, characterized in that: An air groove is provided on the inner wall of the support rod (22), and the air groove penetrates the inner wall surface of the support rod (22); a dustproof plate (223) is fixedly connected to the inside of the air passage (222); a plurality of air holes are provided on the dustproof plate (223); and the dustproof plate (223) is tangent to the bottom wall of the air groove.

5. The water pollutant monitoring device according to claim 4, characterized in that: The outer side of the No. 2 spring (32) is sleeved with an insulating layer (33); the outer side walls of the four slide cylinders (21) are fixedly connected with two counterweights (23); the two counterweights (23) are arranged opposite to the outer side walls of the slide cylinder (21); and the two counterweights (23) are parallel to the support rod (22).

6. A water pollutant monitoring device according to claim 5, characterized in that: A positioning ring (35) is fixedly connected to the top of the collection box (3); four clamping blocks (36) are fixedly connected to the top of the inner wall of the positioning ring (35); the four clamping blocks (36) are evenly distributed on the inner wall of the positioning ring (35); the diameter of the positioning ring (35) is smaller than the diameter of the support column; and a clamping groove is provided at the bottom of the support column corresponding to the positioning ring (35).

7. A water pollutant monitoring device according to claim 6, characterized in that: The slide rod (24) is provided with a movable groove corresponding to the movable rod (25); the movable rod (25) is slidably connected in the movable groove; a No. 1 spring (4) is installed in the movable groove, and the No. 1 spring (4) is located between the bottom wall of the movable groove and one end of the movable rod (25) in the movable groove; a lifting shoulder is provided at one end of the movable rod (25) in the movable groove; and a protrusion is provided in the movable groove corresponding to the lifting shoulder.

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