Environment-friendly engineering water quality detection sampling device

Abstract

The application discloses an environment-friendly engineering water quality detection sampling device, and particularly relates to the technical field of water quality sampling, which comprises a fixed cylinder, a moving mechanism is symmetrically and fixedly connected to the lower end of a counterweight ring, two lower portions of the moving mechanisms are respectively and fixedly connected with adaptive sealing mechanisms, a sampling mechanism is fixedly connected to the inner surface top wall of the fixed cylinder, a rotating mechanism is slidably connected to the lower portion of the outer surface of the sampling mechanism, and a pushing mechanism is fixedly connected to the middle portion of the inner surface of the fixed cylinder. The environment-friendly engineering water quality detection sampling device can not only realize the opening of the sampling cylinder by using water pressure, but also realize the sealing of the sampling cylinder by cooperating with a hose, water pressure, a push rod and other structures, effectively prevents water samples from leaking or being polluted during the recovery process of the device, and can wash the filter plate by using water, so that the filter plate is prevented from being blocked by impurities and the filtering effect of the filter plate in the next use of the device is ensured.

Description

Technical Field

[0001] This invention relates to the field of water quality sampling technology, and in particular to a water quality testing and sampling device for environmental engineering. Background Technology

[0002] Environmental engineering is a discipline that comprehensively applies theories and technical methods from multiple disciplines, including environmental science, engineering, and sociology. It involves the protection and restoration of natural environmental elements such as the atmosphere, water, and soil, as well as the control and treatment of pollutants such as solid waste, noise, and radioactive materials. The implementation of environmental engineering helps maintain ecological balance. For example, by sampling water at different locations and depths in lakes and rivers, a comprehensive understanding of the water quality of these bodies of water can be obtained.

[0003] Chinese Patent Publication No. CN213875121 U discloses an environmental engineering water quality testing and sampling device, including a box body, a box cover, a hinged bracket, a hinged seat, a mounting plate, and a peristaltic pump. The hinged seat is fixedly installed on the inner side wall of the box body, and the hinged bracket is hinged to the hinged seat by a rotating pin. The hinged bracket is an "L"-shaped bracket. In use, the hinged bracket is unfolded outside the box body, and in storage, the hinged bracket is stored inside the box body. The mounting plate is fixedly installed on the hinged bracket, and the peristaltic pump is installed on the mounting plate. A water pumping pipe is installed at the inlet end of the peristaltic pump, and a water receiving pipe is installed at the outlet end of the peristaltic pump.

[0004] However, during operation, the aforementioned device cannot utilize water pressure to open and seal the sampling cylinder. Summary of the Invention

[0005] The main objective of this invention is to provide a water quality testing and sampling device for environmental engineering, which can effectively solve the problem of not being able to open and seal the sampling tube using water pressure during sampling.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An environmental engineering water quality testing and sampling device includes a fixed cylinder, a counterweight ring fixedly connected to the middle of the outer surface of the fixed cylinder, a sealing mechanism symmetrically slidably connected to the lower end of the fixed cylinder, a moving mechanism symmetrically fixedly connected to the lower end of the counterweight ring, the lower parts of the two moving mechanisms being respectively fixedly connected to the matching sealing mechanism, a sampling mechanism fixedly connected to the top wall of the inner surface of the fixed cylinder, a rotating mechanism slidably connected to the lower part of the outer surface of the sampling mechanism, and a pushing mechanism fixedly connected to the middle of the inner surface of the fixed cylinder.

[0008] Preferably, a traction rope is fixedly connected to the middle of the upper end of the fixed cylinder, a filter plate is fixedly connected to the lower part of the inner surface of the fixed cylinder, and sliders are symmetrically fixedly connected to the lower end of the fixed cylinder.

[0009] Preferably, the moving mechanism includes a fixed cage fixedly connected to the lower end of the counterweight ring, an airbag two is provided on the inner surface of the fixed cage, a rigid tube is fixedly connected to the lower part of the outer surface of the airbag two, an airbag three is fixedly connected to the end of the rigid tube away from the fixed cage, a telescopic tube is provided on the outer surface of the airbag three, an L-shaped plate is fixedly connected to the end of the telescopic tube near the outer surface of the fixed cylinder, and the horizontal part of the L-shaped plate away from the telescopic tube is fixedly connected to the outer surface of the fixed cylinder.

[0010] Preferably, the sealing mechanism includes a fixing plate fixedly connected to one end of the telescopic tube away from the L-shaped plate, and a sealing plate fixedly connected to the lower end of the fixing plate.

[0011] Preferably, the upper end of the sealing plate is provided with a sliding groove, the inner surface of the sliding groove is slidably connected to the outer surface of the slider, and the end of the sealing plate away from the fixed plate is uniformly sprayed with a sealing coating.

[0012] Preferably, the sampling mechanism includes a sampling cylinder fixedly connected to the top wall of the inner surface of the fixed cylinder, and a sealing plug is provided on the lower part of the inner surface of the sampling cylinder.

[0013] Preferably, the rotating mechanism includes a ring that is slidably connected to the inner surface of the fixed cylinder. A flexible tube is fixedly connected to one side of the upper end of the ring. Telescopic rods are symmetrically fixedly connected to the lower end of the ring. Rotating plates are rotatably connected to the lower ends of the two telescopic rods. Support rods are rotatably connected to the upper ends of the two rotating plates on opposite sides. The upper ends of the two support rods are fixedly connected to the lower end of the sealing plug. L-shaped rods are rotatably connected to the front and rear ends of the two rotating plates. The two L-shaped rods on the same side are fixedly connected to the inner surface of the fixed cylinder.

[0014] Preferably, the outer surface of the end of the hose away from the annulus penetrates the inner surface of the fixed cylinder and extends to the outside of the fixed cylinder. A soft plug is provided on the inner surface of the end of the hose away from the annulus. A fixing rope is fixedly connected to the outer surface of the soft plug away from the hose. The end of the fixing rope away from the soft plug is fixedly connected to the outer surface of the fixed cylinder.

[0015] Preferably, the pushing mechanism includes an arc-shaped plate symmetrically and fixedly connected to the middle of the inner surface of the fixed cylinder. The lower ends of the two arc-shaped plates are fixedly connected to telescopic boxes. The lower ends of the two telescopic boxes are symmetrically and fixedly connected to push rods. The inner surfaces of the two telescopic boxes are provided with airbags. The upper outer surfaces of the two airbags are fixedly connected to water pipes. The ends of the two water pipes away from the airbags are jointly fixedly connected to water pipes. The middle of the outer surface of the water pipes located on the front side of the inner surface of the fixed cylinder is fixedly connected to a water pipe. The end of the water pipe away from the water pipes is fixedly connected to a hose.

[0016] Preferably, a one-way valve is fixedly connected to the end of the water pipe three away from the water pipe two. The inner surface of the one-way valve one is fixedly connected to the end of the hose near the inner surface of the fixed cylinder. The outer surfaces of the two water pipes two penetrate the top wall of the inner surface of the fixed cylinder and extend to the outside of the fixed cylinder.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This invention utilizes two moving mechanisms in conjunction with a sealing mechanism. When the device descends to a predetermined depth, the seal on the lower end of the fixed cylinder is automatically released, allowing water to smoothly enter the fixed cylinder. Simultaneously, the sampling mechanism inside the fixed cylinder, under water pressure, stably collects water samples as water flows in, improving the accuracy and reliability of sampling. By pushing the rotating mechanism downwards, excess water between the outside of the sampling mechanism and the inner surface of the fixed cylinder is squeezed out, and the lower part of the inner surface of the fixed cylinder is also rinsed, effectively preventing solid impurities from clogging the internal structure. At the same time, the sampling mechanism is resealed during the downward movement of the rotating mechanism, ensuring that the collected water sample is not contaminated or leaked during the device recovery process, and preserving the water sample intact for subsequent testing and analysis.

[0019] 2. This invention adjusts the inflation level of the second airbag so that after the device reaches a predetermined depth, the water pressure at that depth squeezes the second airbag, thereby pushing the sealing plate to move and opening the lower end of the fixed cylinder for water intake. This ensures sampling at the appropriate depth and effectively prevents premature water intake during descent, guaranteeing the accuracy of the sampling depth. Furthermore, the coordination between the ring, the two telescopic rods, the two support rods, and other structures not only utilizes water pressure to open the sampling cylinder but also works with the hose, water pressure, and push rod to seal the sampling cylinder, effectively preventing water leakage or contamination during device recovery. It also allows for water rinsing of the filter plate, preventing impurities from clogging it and ensuring the filter plate's filtration effect for the next use of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall internal structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the fixed cylinder of the present invention;

[0023] Figure 4 This is a schematic diagram of the moving mechanism structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the moving mechanism and sealing mechanism of the present invention;

[0025] Figure 6 This is a schematic diagram of the rotating mechanism structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the actuation mechanism of the present invention;

[0027] Figure 8 This is a partial structural diagram of the actuation mechanism of the present invention;

[0028] Figure 9 This is a schematic diagram of the sampling mechanism structure of the present invention;

[0029] Figure 10 This is a schematic diagram of the overall structure of the present invention in different states;

[0030] Figure 11 For the present invention Figure 4 Enlarged structural diagram at point A in the middle.

[0031] In the diagram: 1. Fixed cylinder; 11. Traction rope; 12. Filter plate; 13. Slider; 2. Pushing mechanism; 21. Water pipe one; 22. Water pipe two; 23. Arc plate; 24. Telescopic box; 25. Water pipe three; 251. One-way valve one; 26. Airbag one; 27. Push rod; 3. Counterweight ring; 4. Moving mechanism; 41. Fixed cage; 42. Rigid pipe; 43. Telescopic pipe; 44. Airbag two; 45. Airbag three; 46. L-shaped plate; 5. Sealing mechanism; 51. Sealing plate; 511. Slide groove; 52. Fixed plate; 6. Sampling mechanism; 61. Sampling cylinder; 62. Sealing plug; 7. Rotating mechanism; 71. Ring; 72. Hose; 721. Soft plug; 722. Fixed rope; 73. Telescopic rod; 74. Rotating plate; 75. Support rod; 76. L-shaped rod. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] Example 1, as Figure 1 and Figure 2 As shown, an environmental engineering water quality testing and sampling device includes a fixed cylinder 1, a counterweight ring 3 fixedly connected to the middle of the outer surface of the fixed cylinder 1, a sealing mechanism 5 symmetrically slidably connected to the lower end of the fixed cylinder 1, the sealing mechanism 5 including a sealing plate 51, a moving mechanism 4 symmetrically fixedly connected to the lower end of the counterweight ring 3, the lower parts of the two moving mechanisms 4 respectively fixedly connected to the matching sealing mechanism 5, a sampling mechanism 6 fixedly connected to the top wall of the inner surface of the fixed cylinder 1, a rotating mechanism 7 slidably connected to the lower part of the outer surface of the sampling mechanism 6, and a pushing mechanism 2 fixedly connected to the middle of the inner surface of the fixed cylinder 1.

[0034] When it is necessary to test the water quality at different depths in a lake, the sampling depth of the entire device can be adjusted by adjusting the parameters of the counterweight ring 3. When the entire device is used for water quality sampling, the tension of the internal structure of the two moving mechanisms 4 is adjusted according to the parameters set by the counterweight ring 3. Then the entire device is placed in the water. When the entire device descends to the predetermined depth, the two moving mechanisms 4 cooperate with the two sealing mechanisms 5 to release the seal on the lower end of the fixed cylinder 1.

[0035] The counterweight ring 3 mentioned above is a commonly used counterweight setting in the prior art. By presetting the parameters of the counterweight ring 3, it is easy for the counterweight ring 3 to cooperate with the rapid descent of the whole in the water to prepare for sampling.

[0036] The weight of counterweight ring 3 must meet the following requirements:

[0037] G 配重 =ρ 水 V 装置 -F 气囊浮力 +F 密封板阻力

[0038] The above, ρ 水 Given that the density of water is 1.0 × 10³ kg / m³, V 装置 F is the total volume of water displaced by the device. 气囊浮力 F is the total buoyancy of all airbags. 密封板阻力 To experimentally measure the sliding resistance of sealing plates 51 made of different materials, the sliding resistance of the sealing plate 51 used in this scheme is 5-10N;

[0039] Based on the weight calculation formula of counterweight ring 3, the weight of counterweight ring 3 at different sampling depths can be calculated.

[0040] Furthermore, the aforementioned counterweight ring 3 is made of 304 stainless steel, which is commonly used in existing technologies. It has a density of 7.9 g / cm³, a diameter of 200 mm, and a thickness of 15 mm.

[0041] Subsequently, water enters the inner surface of the fixed cylinder 1 through the lower end of the fixed cylinder 1, and then pushes the rotating mechanism 7 upward through the water, thereby enabling the sampling mechanism 6 to stably collect water samples. At the same time, due to the setting of the fixed cylinder 1, solid impurities in the collected water sample can be filtered and blocked outside the fixed cylinder 1, avoiding damage to the equipment.

[0042] After sampling for a period of time, gas is continuously introduced into a part of the structure of the pushing mechanism 2. With the cooperation of the pushing mechanism 2, the water pressure at the top of the rotating mechanism 7 is made close to that at the bottom. At the same time, gas continues to be introduced into a part of the structure of the pushing mechanism 2. The pushing mechanism 2 pushes the rotating mechanism 7 downward. Then, as the rotating mechanism 7 is pushed downward, it continuously squeezes the water on the inner surface of the fixed cylinder 1. Subsequently, the water between the outside of the sampling mechanism 6 and the inner surface of the fixed cylinder 1 is squeezed out by the rotating mechanism 7. At the same time, the lower part of the inner surface of the fixed cylinder 1 is rinsed from the inside out to avoid solid impurities blocking the internal structure of the fixed cylinder 1 during the water sampling process.

[0043] Similarly, as the rotating mechanism 7 is pushed downward, the sampling mechanism 6 can be sealed again, including the collected water sample.

[0044] Then, the entire structure is stretched upwards, and after the entire device is removed, the sampling mechanism 6 can be removed as a whole for water quality testing.

[0045] During the operation of this embodiment, the two moving mechanisms 4 cooperate with the sealing mechanism 5 to automatically release the seal on the lower end of the fixed cylinder 1 when the device descends to a predetermined depth, allowing water to smoothly enter the fixed cylinder 1. At the same time, the sampling mechanism 6 inside the fixed cylinder 1 collects water samples stably under water pressure as the water flows in, improving the accuracy and reliability of sampling. By pushing the rotating mechanism 7 downward through the pushing mechanism 2, excess water between the outside of the sampling mechanism 6 and the inner surface of the fixed cylinder 1 is squeezed out, and the lower part of the inner surface of the fixed cylinder 1 is also rinsed, effectively preventing solid impurities from clogging the internal structure. Meanwhile, the sampling mechanism 6 is sealed again during the downward movement of the rotating mechanism 7 to ensure that the collected water sample is not contaminated or leaked during the device recovery process, and the water sample is completely preserved for subsequent testing and analysis.

[0046] Example 2: Based on Example 1, this example aims to achieve the effect of opening and sealing the sampling cylinder 61 using water pressure.

[0047] See Figure 3 A traction rope 11 is fixedly connected to the middle of the upper end of the fixed cylinder 1, a filter plate 12 is fixedly connected to the lower part of the inner surface of the fixed cylinder 1, and sliders 13 are symmetrically fixedly connected to the lower end of the fixed cylinder 1.

[0048] The end of the traction rope 11 away from the fixed cylinder 1 is fixedly connected to a winch commonly used in the prior art. When it is necessary to collect water samples at different depths in the lake, the length of the traction rope 11 is changed by the winch, thereby enabling the fixed cylinder 1 to drive the overall structure to rise and fall.

[0049] Meanwhile, during the sampling process, the filter plate 12 prevents solid impurities from entering the inner surface of the fixed cylinder 1 during sampling at different depths of the lake. The pore size of the filter plate 12 allows some plankton to enter the inner surface of the fixed cylinder 1 and be collected, ensuring the integrity of the water quality sampling and facilitating the assessment of the lake's ecological condition based on the water sample.

[0050] See Figure 4 and Figure 5 The moving mechanism 4 includes a fixed cage 41 fixedly connected to the lower end of the counterweight ring 3. An airbag 44 is provided on the inner surface of the fixed cage 41. A rigid tube 42 is fixedly connected to the lower part of the outer surface of the airbag 44. An airbag 45 is fixedly connected to the end of the rigid tube 42 away from the fixed cage 41. A telescopic tube 43 is provided on the outer surface of the airbag 45. An L-shaped plate 46 is fixedly connected to the end of the telescopic tube 43 near the outer surface of the fixed cylinder 1. The horizontal part of the L-shaped plate 46 away from the telescopic tube 43 is fixedly connected to the outer surface of the fixed cylinder 1.

[0051] See Figure 11 An annular sealing ring is provided at the connection between the telescopic pipe 43 and the rigid pipe 42. The material of the annular sealing ring is fluororubber, which is commonly used in the prior art. The rigid pipe 42 and the annular sealing ring are dynamically sealed with the telescopic pipe 43 through an interference fit to prevent water from seeping into the interior of the telescopic pipe 43 from the gap between the telescopic pipe 43 and the rigid pipe 42, while not affecting the telescopic operation of the telescopic pipe 43.

[0052] The outer surface of the airbag 45 and the inner wall of the telescopic tube 43 are bonded together by hot pressing to form an integral structure, avoiding sealing failure caused by relative sliding. The telescopic tube 43 adopts a corrugated design, and its axial expansion and contraction deformation capacity can adapt to the expansion or contraction of the airbag 45. At the same time, the pleated structure of the telescopic tube 43 maintains the sealing performance through elastic deformation.

[0053] Furthermore, the horizontal portion of the L-shaped plate 46 is fixed to the outer surface of the fixed cylinder 1 by laser welding, ensuring that there is no leakage at the connection between the L-shaped plate 46 and the fixed cylinder 1 when the airbag 45 expands and pushes the telescopic tube 43 to move axially.

[0054] Specifically, when preparing for sampling, a certain amount of gas is injected into the second airbag 44. At the same time, the inner surface of the second airbag 44 is connected to the rigid tube 42 and the inner surface of the third airbag 45. Meanwhile, the telescopic tube 43, together with the L-shaped plate 46, can seal the outer surface of the third airbag 45, preventing water leakage.

[0055] The formula for calculating the internal inflation volume of Airbag 2.44 is as follows:

[0056] P0 = ρ 水 gh+△P 安全裕度

[0057] In the above formula, the safety margin ΔP is taken as 10 kPa to ensure that the second airbag 44 is compressed at the target depth just enough to trigger the movement of the sealing plate 51.

[0058] For example, when it is necessary to collect a sample at a water depth of 10m, the inflation volume of airbag 2 44 is 0.8L, and the initial inflation volume of airbag 3 45 is 0.2L.

[0059] By combining the calculation formula for the inflation volume inside airbag 44 with the weight calculation formula for counterweight ring 3, the sampling depth can be freely adjusted.

[0060] Similarly, a one-way valve is installed at one end of the rigid tube 42 near the fixed cage 41, which only allows gas to flow from airbag 2 44 to airbag 3 45. The volume ratio of airbag 2 44 to airbag 3 45 is 3:1, ensuring that when airbag 2 44 is compressed by water pressure, the expansion of airbag 3 45 is sufficient to push the telescopic tube 43 to move. Moreover, because airbag 3 45 has a smaller volume, the internal air pressure rises rapidly, inhibiting the reverse flow of gas.

[0061] The composite layer material commonly used in the prior art of the telescopic tube 43 mentioned above, through the composite structure of the inner silicone rubber and the outer TPU, takes into account both flexibility and pressure resistance. At the same time, the dynamic sealing performance is ensured by the corrugated tube deformation and interlayer bonding between the annular sealing ring and the rigid tube 42.

[0062] The aforementioned airbag 44 is another composite layer material commonly used in the prior art. Its outer layer is woven with unidirectional aramid fibers, and its inner layer is butyl rubber. The inner and outer layers work together to achieve high airtightness.

[0063] The material of the aforementioned airbag 345 is a combination of NBR and polyester fiber, which ensures that the airbag 345 can achieve axial expansion.

[0064] When the entire device is placed in water and descends to a predetermined depth, water at that depth continuously enters the fixed cage 41 through the holes in the fixed cage 41, thereby compressing the second airbag 44. This causes the gas inside the second airbag 44 to enter the inner surface of the third airbag 45 through the inner surface of the rigid tube 42. Due to the sealing of the outer surface of the third airbag 45 by the cooperation of the telescopic tube 43 and the L-shaped plate 46, the third airbag 45 gradually expands when the second airbag 44 is compressed.

[0065] During the inflation of the airbag 45, the telescopic tube 43 can only move to the right and cannot move forward, backward or up and down due to its configuration. As a result, the inflated airbag 45 will continuously push the end of the telescopic tube 43 away from the L-shaped plate 46 and move it away from the outer surface of the fixed cylinder 1.

[0066] See Figure 5 The sealing mechanism 5 includes a fixing plate 52 fixedly connected to one end of the telescopic tube 43 away from the L-shaped plate 46, and the lower end of the fixing plate 52 is fixedly connected to the sealing plate 51.

[0067] Furthermore, when the end of the telescopic tube 43 away from the L-shaped plate 46 is continuously pushed by the inflated airbag 45, the telescopic tube 43 will push the fixing plate 52 in the same direction, which will in turn drive the sealing plate 51 to move in the same direction. At this time, the two sealing plates 51 approach each other and no longer seal the lower end of the fixing cylinder 1.

[0068] See Figure 5 The upper end of the sealing plate 51 is provided with a sliding groove 511, the inner surface of the sliding groove 511 is slidably connected to the outer surface of the slider 13, and the end of the sealing plate 51 away from the fixed plate 52 is uniformly sprayed with a sealing coating.

[0069] When the overall device has not reached the predetermined depth, the two sealing plates 51 cooperate with each other due to the cooperation of the sealing coating to always seal the lower end of the fixed cylinder 1.

[0070] The sealing coating mentioned above is an epoxy resin sealing coating commonly used in the prior art. When the epoxy resin sealing coating is used to seal the lower end of the fixed cylinder 1 with the sealing plate 51, it can prevent water from entering the inner surface of the fixed cylinder 1 through the gap between the two sealing plates 51.

[0071] Furthermore, when the sealing plate 51 is driven by the fixing plate 52 to slide away from the outer surface of the fixing cylinder 1, the sealing plate 51 moves horizontally through the cooperation between the slider 13 and the inner surface of the groove 511.

[0072] When water samples need to be collected at different depths, the inflation degree of the airbag 44 is adjusted according to the parameters of the counterweight ring 3 to ensure that after reaching the predetermined depth, the water at that depth squeezes the airbag 44 to push the sealing plate 51 to move. At the same time, due to the setting of the counterweight ring 3, the overall device descends faster in the water. During the descent, the water squeezes the airbag 44 so that the two sealing plates 51 are not separated. After reaching the predetermined depth, the water at that depth gradually squeezes the airbag 44, thereby separating the two sealing plates 51 and thus making the inner surface of the fixed cylinder 1 no longer sealed.

[0073] At the same time, by filling the airbag 44 with gas before water enters, the airbag 44 is compressed to the point where its internal air pressure is the same as the water pressure. At this time, the two sealing plates 51 cooperate to keep the lower end of the fixed cylinder 1 in an open state.

[0074] See Figure 6The rotating mechanism 7 includes a ring 71 that is slidably connected to the inner surface of the fixed cylinder 1. A flexible hose 72 is fixedly connected to one side of the upper end of the ring 71. Telescopic rods 73 are symmetrically fixedly connected to the lower end of the ring 71. Rotating plates 74 are rotatably connected to the lower ends of the two telescopic rods 73. Support rods 75 are rotatably connected to the upper ends of the two rotating plates 74 that are close to each other. L-shaped rods 76 are rotatably connected to the front and rear ends of the two rotating plates 74. The two L-shaped rods 76 on the same side are fixedly connected to the inner surface of the fixed cylinder 1.

[0075] As the two sealing plates 51 gradually slide away from each other, water enters the inner surface of the fixed cylinder 1 through the gap between the two sealing plates 51 and the filter plate 12.

[0076] Furthermore, after the water enters the inner surface of the fixed cylinder 1, it will push the ring 71 upward. Then the ring 71 slides upward along the inner surface of the fixed cylinder 1. During the process of the ring 71 being pushed upward by the water, the air between the inner surface of the fixed cylinder 1 and the upper end of the ring 71 will be squeezed. At the same time, the end of the hose 72 that is fixedly connected to the ring 71 will be driven upward by the ring 71.

[0077] Similarly, as the ring 71 is pushed upward, it will simultaneously drive the upper ends of the two telescopic rods 73 to move upward. At this time, the two telescopic rods 73 are stretched. When the two telescopic rods 73 are stretched to their maximum position, the air pressure between the upper end of the ring 71 and the inner surface of the fixed cylinder 1 is still less than the water pressure at that depth. As a result, the ring 71 is still pushed upward by the water, and then the ring 71 drives the two telescopic rods 73 to move upward.

[0078] As the two telescopic rods 73 move upward, they drive the rotating plate 74 to rotate. Through the cooperation of the two L-shaped rods 76 on the same side with the rotating plate 74, the two rotating plates 74 rotate with one end facing upward and the other end facing downward. Then, as the two rotating plates 74 move closer to each other and rotate downward, they drive the two support rods 75 to descend until the gas at the upper end of the ring 71 and the inner surface of the fixed cylinder 1 is compressed to the same pressure as the water pressure at that depth. At this point, the ring 71 stops moving, and the support rods 75 are no longer driven to descend.

[0079] See Figure 6 The outer surface of the end of the hose 72 away from the ring 71 penetrates the inner surface of the fixed cylinder 1 and extends to the outside of the fixed cylinder 1. A soft plug 721 is provided on the inner surface of the end of the hose 72 away from the ring 71. A fixing rope 722 is fixedly connected to the outer surface of the soft plug 721 away from the hose 72. The end of the fixing rope 722 away from the soft plug 721 is fixedly connected to the outer surface of the fixed cylinder 1.

[0080] Specifically, before sampling, the inner surface of the flexible tube 72 is sealed with a soft plug 721, and the fixing rope 722 is used to fix the fixing rope 722 to the outer surface of the fixing tube 1.

[0081] As the entire device enters the lake and descends to prepare for sampling, the soft plug 721 continuously seals the inner surface of the flexible tube 72.

[0082] Similarly, as the ring 71 is pushed upward by the water, the hose 72 is also driven upward, while the soft plug 721 still seals the inner surface of the hose 72.

[0083] See Figure 9 The sampling mechanism 6 includes a sampling cylinder 61 that is fixedly connected to the top wall of the inner surface of the fixed cylinder 1. A sealing plug 62 is provided on the lower part of the inner surface of the sampling cylinder 61, and the upper ends of the two support rods 75 are fixedly connected to the lower end of the sealing plug 62.

[0084] Furthermore, as the two support rods 75 are driven to move downward, the two support rods 75 work together to drive the sealing plug 62 down, so that the lower end of the sampling cylinder 61 is no longer sealed. At this time, water continuously enters the inner surface of the sampling cylinder 61 until the inner surface of the sampling cylinder 61 is filled with water.

[0085] See Figure 7 and Figure 8 The pushing mechanism 2 includes an arc-shaped plate 23 symmetrically fixedly connected to the middle of the inner surface of the fixed cylinder 1. The lower ends of the two arc-shaped plates 23 are fixedly connected to telescopic boxes 24. The lower ends of the two telescopic boxes 24 are symmetrically fixedly connected to push rods 27. The inner surfaces of the two telescopic boxes 24 are provided with airbags 26. The upper outer surfaces of the two airbags 26 are fixedly connected to water pipes 22. The ends of the two water pipes 22 away from the airbags 26 are fixedly connected to water pipe 21. The middle of the outer surface of the water pipe 22 located on the front side of the inner surface of the fixed cylinder 1 is fixedly connected to a water pipe 25. The end of the water pipe 25 away from the water pipe 22 is fixedly connected to a hose 72. The end of the water pipe 25 away from the water pipe 22 is fixedly connected to a one-way valve 251. The inner surface of the one-way valve 251 is fixedly connected to the end of the hose 72 near the inner surface of the fixed cylinder 1. The outer surfaces of the two water pipes 22 penetrate the top wall of the inner surface of the fixed cylinder 1 and extend to the outside of the fixed cylinder 1.

[0086] The two water pipes 22 above cooperate with water pipe 21. During the sampling process, water pipe 21 is always fixed to the outer surface of the traction rope 11 and does not affect the air passage of water pipe 21. At the same time, the end of water pipe 21 away from the two water pipes 22 is connected to an external air pump. The air pump is a commonly used inflation and deflation tool in the prior art. It is connected to one end of water pipe 21, which facilitates inflation of the two airbags 26 and water pipe 25 through water pipe 21 and the two water pipes 22.

[0087] The one-way valve 251 mentioned above is a commonly used technical means in the prior art. By setting the one-way valve 251, gas can enter the inner surface of the hose 72 through the inner surface of the water pipe 25, while water cannot enter the inner surface of the water pipe 25 through the inner surface of the hose 72.

[0088] Once the device is placed at a certain depth in the lake, after a period of automatic sampling, air is continuously pumped into the inner surface of water pipe 21 using an air pump commonly used in existing technologies. The pumped air is then transported downwards through the cooperation of two water pipes 22.

[0089] For further details, please refer to [link / reference]. Figure 10 When some gas enters the inner surface of water pipe 25 through the inner surface of water pipe 22, and then enters the inner surface of hose 72 through one-way valve 1 251, the gas pressure on the inner surface of hose 72 increases, and it will gradually push the soft plug 721 outward until the soft plug 721 no longer seals the inner surface of hose 72. At this time, the fixing rope 722 cooperates with the outer surface of the fixing cylinder 1 to prevent the soft plug 721 from falling off.

[0090] While some gas enters water pipe 3 25, gas enters the inner surface of two airbags 1 26 through two water pipes 2 22. Then the air pressure inside the two airbags 1 26 increases, and the two airbags 1 26 gradually expand, which in turn squeezes the lower end of the adapted telescopic box 24 downward. Then the two telescopic boxes 24 will push down the two push rods 27 fixed to the telescopic box 24.

[0091] Then the four push rods 27 will push the ring 71 downwards.

[0092] When the soft plug 721 no longer seals the inner surface of the hose 72, water from the outer surface of the fixed cylinder 1 enters the inner surface of the hose 72, which causes the water pressure at the upper end of the ring 71 to be basically the same as that at the lower end. Then, the air pressure between the upper end of the ring 71 and the inner surface of the fixed cylinder 1, together with the four push rods 27, pushes the ring 71 downwards simultaneously, using external water pressure to avoid the need for excessive power when pushing the ring 71 downwards.

[0093] During the downward pushing of the ring 71, the two telescopic rods 73 and the rotating plate 74 work together to make the rotating plate 74 rotate in the opposite direction. This allows the two support rods 75 to be driven upward during the descent of the ring 71, thereby driving the sealing plug 62 upward to seal the inner surface of the sampling cylinder 61.

[0094] Meanwhile, as the ring 71 descends, it continuously squeezes the water between the lower end of the ring 71 and the inner surface of the fixed cylinder 1 and the outer surface of the sampling cylinder 61. This water is squeezed out through the filter plate 12 and flushes the pores of the filter plate 12 from top to bottom. This can wash away the solid impurities blocked and filtered by the lower end of the filter plate 12 during the sampling process, thus performing a self-cleaning process.

[0095] Subsequently, after the ring 71 is pushed down to the initial position, the inner surface of the water pipe 21 is no longer inflated. At this time, the sealing plug 62 has sealed the lower part of the inner surface of the sampling cylinder 61 again. Then, the entire device is pulled upward by the winch and the traction rope 11, and the water pipe 21 is wound up.

[0096] Therefore, this solution adjusts the inflation level of the airbag 44 so that after the device reaches a predetermined depth, the water pressure at that depth squeezes the airbag 44, thereby pushing the sealing plate 51 to move and opening the lower end of the fixed cylinder 1 to allow water to enter. This ensures sampling at a suitable depth and effectively prevents premature water entry during descent, guaranteeing the accuracy of the sampling depth. Simultaneously, the cooperation between the ring 71, the two telescopic rods 73, the two support rods 75, and other structures not only allows the water pressure to open the sampling cylinder 61 but also, in conjunction with the hose 72, water pressure, and push rod 27, seals the sampling cylinder 61, effectively preventing water leakage or contamination during device recovery. Furthermore, water can be used to rinse the filter plate 12, preventing impurities from clogging it and ensuring the filtration effect of the filter plate 12 for the next use of the device.

[0097] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A water quality testing and sampling device for environmental protection engineering, comprising a fixed cylinder (1), characterized in that: A counterweight ring (3) is fixedly connected to the middle of the outer surface of the fixed cylinder (1). A sealing mechanism (5) is symmetrically slidably connected to the lower end of the fixed cylinder (1). A moving mechanism (4) is symmetrically fixedly connected to the lower end of the counterweight ring (3). The lower parts of the two moving mechanisms (4) are respectively fixedly connected to the matching sealing mechanism (5). A sampling mechanism (6) is fixedly connected to the top wall of the inner surface of the fixed cylinder (1). A rotating mechanism (7) is slidably connected to the lower part of the outer surface of the sampling mechanism (6). A pushing mechanism (2) is fixedly connected to the middle of the inner surface of the fixed cylinder (1). The moving mechanism (4) includes a fixed cage (41) fixedly connected to the lower end of the counterweight ring (3). An airbag (44) is provided on the inner surface of the fixed cage (41). A rigid tube (42) is fixedly connected to the lower part of the outer surface of the airbag (44). An airbag (45) is fixedly connected to the end of the rigid tube (42) away from the fixed cage (41). A telescopic tube (43) is provided on the outer surface of the airbag (45). An L-shaped plate (46) is fixedly connected to the end of the telescopic tube (43) near the outer surface of the fixed cylinder (1). The horizontal part of the L-shaped plate (46) away from the telescopic tube (43) is fixedly connected to the outer surface of the fixed cylinder (1). The sealing mechanism (5) includes a fixing plate (52) fixedly connected to one end of the telescopic tube (43) away from the L-shaped plate (46), and a sealing plate (51) is fixedly connected to the lower end of the fixing plate (52). The rotating mechanism (7) includes a ring (71) that is slidably connected to the inner surface of the fixed cylinder (1). A hose (72) is fixedly connected to one side of the upper end of the ring (71). Telescopic rods (73) are symmetrically fixedly connected to the lower end of the ring (71). Rotating plates (74) are rotatably connected to the lower ends of the two telescopic rods (73). Support rods (75) are rotatably connected to the upper ends of the two rotating plates (74) on the side close to each other. L-shaped rods (76) are rotatably connected to the front and rear ends of the two rotating plates (74). The two L-shaped rods (76) on the same side are fixedly connected to the inner surface of the fixed cylinder (1). The pushing mechanism (2) includes an arc-shaped plate (23) symmetrically fixedly connected to the middle of the inner surface of the fixed cylinder (1). The lower ends of the two arc-shaped plates (23) are fixedly connected to telescopic boxes (24). The lower ends of the two telescopic boxes (24) are symmetrically fixedly connected to push rods (27). The inner surfaces of the two telescopic boxes (24) are provided with airbags (26). The upper outer surfaces of the two airbags (26) are fixedly connected to water pipes (22). The ends of the two water pipes (22) away from the airbags (26) are fixedly connected to water pipes (21). The middle of the outer surface of the water pipes (22) located on the front side of the inner surface of the fixed cylinder (1) is fixedly connected to water pipes (25). The end of the water pipes (25) away from the water pipes (22) is fixedly connected to a hose (72). One-way valve 1 (251) is fixedly connected to one end of water pipe 3 (25) away from water pipe 2 (22). The inner surface of one-way valve 1 (251) is fixedly connected to one end of hose (72) near the inner surface of fixed cylinder (1). The outer surfaces of the two water pipes 2 (22) penetrate the top wall of the inner surface of fixed cylinder (1) and extend to the outside of fixed cylinder (1).

2. The environmental engineering water quality testing and sampling device according to claim 1, characterized in that: A traction rope (11) is fixedly connected to the middle of the upper end of the fixed cylinder (1), a filter plate (12) is fixedly connected to the lower part of the inner surface of the fixed cylinder (1), and a slider (13) is symmetrically fixedly connected to the lower end of the fixed cylinder (1).

3. The environmental engineering water quality testing and sampling device according to claim 1, characterized in that: The upper end of the sealing plate (51) is provided with a groove (511), the inner surface of the groove (511) is slidably connected to the outer surface of the slider (13), and the end of the sealing plate (51) away from the fixed plate (52) is uniformly sprayed with a sealing coating.

4. The environmental engineering water quality testing and sampling device according to claim 1, characterized in that: The sampling mechanism (6) includes a sampling cylinder (61) fixedly connected to the top wall of the inner surface of the fixed cylinder (1), and a sealing plug (62) is provided on the lower part of the inner surface of the sampling cylinder (61).

5. The environmental protection engineering water quality testing and sampling device according to claim 4, characterized in that: The upper ends of the two support rods (75) are fixedly connected to the lower end of the sealing plug (62).

6. The environmental engineering water quality testing and sampling device according to claim 1, characterized in that: The outer surface of the end of the hose (72) away from the ring (71) penetrates the inner surface of the fixed cylinder (1) and extends to the outside of the fixed cylinder (1). A soft plug (721) is provided on the inner surface of the end of the hose (72) away from the ring (71). A fixing rope (722) is fixedly connected to the outer surface of the soft plug (721) away from the hose (72). The end of the fixing rope (722) away from the soft plug (721) is fixedly connected to the outer surface of the fixed cylinder (1).

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