Water quality detection sampling device for environmental protection engineering

Abstract

The invention discloses an environmental protection engineering water quality detection sampling device, and particularly relates to the technical field of water quality sampling, the environmental protection engineering water quality detection sampling device comprises a fixed cylinder, the lower end of a counterweight ring is symmetrically and fixedly connected with moving mechanisms, the lower parts of the two moving mechanisms are fixedly connected with matched sealing mechanisms, and the top wall of the inner surface of the fixed cylinder is fixedly connected with a sampling mechanism. A rotating mechanism is slidably connected to the lower part of the outer surface of the sampling mechanism, and a pushing mechanism is fixedly connected to the middle of the inner surface of the fixed cylinder. According to the environment-friendly engineering water quality detection sampling device disclosed by the invention, the circular ring is matched with the two telescopic rods, the two supporting rods and each structure, so that the sampling barrel can be opened by utilizing water pressure, and the sampling barrel can be sealed by matching with structures such as a hose, the water pressure and a push rod; water samples are effectively prevented from leaking or being polluted in the recovery process of the device, the filter plate can be washed by water, impurities can be prevented from blocking the filter plate, and the filtering effect of the filter plate when the device is used next time is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality sampling, and particularly relates to a water quality detection and sampling device for environmental protection projects. Background Art

[0002] Environmental protection projects comprehensively apply multi-disciplinary theories and technical methods such as environmental science, engineering, and sociology, involving 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 substances. The implementation of environmental protection projects helps to maintain ecological balance. For example, by sampling the water quality at different positions and depths of lakes, rivers, etc., the water quality conditions of lakes, rivers, etc. can be comprehensively understood.

[0003] Chinese Patent Publication No. CN213875121 U discloses a water quality detection and sampling device for environmental protection projects, including a box body, a box cover, a hinge bracket, a hinge seat, a mounting plate, and a peristaltic pump. The hinge seat is fixedly installed on the inner side wall of the box body. The hinge bracket is hingedly installed on the hinge seat through a rotating pin shaft. The hinge bracket is an "L"-shaped bracket. In the use state, the hinge bracket is unfolded outside the box body, and in the storage state, the hinge bracket is stored inside the box body. The mounting plate is fixedly installed on the hinge bracket, and the peristaltic pump is installed on the mounting plate. The inlet end of the peristaltic pump is installed with a water suction pipe, and the outlet end of the peristaltic pump is installed with a water connection pipe.

[0004] However, during the operation of the above device, it is impossible to open and seal the sampling cylinder by using water pressure during sampling. Summary of the Invention

[0005] The main purpose of the present invention is to provide a water quality detection and sampling device for environmental protection projects, which can effectively solve the problem that it is impossible to open and seal the sampling cylinder by using water pressure during sampling.

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

[0007] A water quality detection and sampling device for environmental protection projects, including a fixed cylinder. A counterweight ring is fixedly connected to the middle of the outer surface of the fixed cylinder. Sealing mechanisms are symmetrically and slidably connected to the lower end of the fixed cylinder. Moving mechanisms are symmetrically and fixedly connected to the lower end of the counterweight ring. The lower parts of the two moving mechanisms are respectively fixedly connected to the adapted sealing mechanisms. A sampling mechanism is fixedly connected to the top wall of the inner surface of the fixed cylinder. A rotating mechanism is slidably connected to the lower part of the outer surface of the sampling mechanism. A pushing mechanism is 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. Sliders are symmetrically and 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 II is arranged on the inner surface of the fixed cage. A hard pipe is fixedly connected to the lower part of the outer surface of the airbag II. One end of the hard pipe far away from the fixed cage is fixedly connected to an airbag III. A telescopic pipe is arranged on the outer surface of the airbag III. One end of the telescopic pipe close to the outer surface of the fixed cylinder is fixedly connected to an L-shaped plate. The end of the horizontal part of the L-shaped plate far away from the telescopic pipe is fixedly connected to the outer surface of the fixed cylinder.

[0010] Preferably, the sealing mechanism includes a fixing plate fixedly connected to the end of the telescopic pipe far away from the L-shaped plate. A sealing plate is fixedly connected to the lower end of the fixing plate.

[0011] Preferably, a sliding groove is formed in the upper end of the sealing plate. The outer surface of a slider is slidably connected to the inner surface of the sliding groove. A sealing coating is evenly sprayed on the end of the sealing plate far away from the fixing plate.

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

[0013] Preferably, the rotating mechanism includes a ring slidably connected to the inner surface of the fixed cylinder. One side of the upper end of the ring is fixedly connected to a hose. The lower end of the ring is symmetrically fixedly connected to telescopic rods. The lower ends of the two telescopic rods are rotatably connected to a rotating plate. One side of the upper ends of the two rotating plates close to each other is rotatably connected to a support rod. The upper ends of the two support rods are jointly fixedly connected to the lower end of the sealing plug. The front end and the rear end of each of the two rotating plates are rotatably connected to an L-shaped rod. The two L-shaped rods on the same side are jointly fixedly connected to the inner surface of the fixed cylinder.

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

[0015] Preferably, the pushing mechanism includes arc-shaped plates symmetrically fixedly connected to the middle part 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 fixedly connected to push rods. An airbag I is arranged on the inner surface of each of the two telescopic boxes. A water pipe II is fixedly connected to the upper part of the outer surface of each of the two airbag Is. The ends of the two water pipes II far away from the airbag I are jointly fixedly connected to a water pipe I. A water pipe III is fixedly connected to the middle part of the outer surface of the water pipe II on the front side of the inner surface of the fixed cylinder. The end of the water pipe III far away from the water pipe II is fixedly connected to the hose.

[0016] Preferably, one end of the third water pipe away from the second water pipe is fixedly connected with a first one-way valve, the inner surface of the first one-way valve is fixedly connected with one end of the hose close to the inner surface of the fixed cylinder, and the outer surfaces of the two second water pipes penetrate through 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. Through the mutual cooperation of the two moving mechanisms and the sealing mechanism, the present invention automatically releases the seal of the lower end of the fixed cylinder when the device descends to a predetermined depth, and water can smoothly enter the fixed cylinder. At the same time, with the influx of water, the sampling mechanism in the fixed cylinder stably collects water samples under the action of water pressure, improving the accuracy and reliability of sampling. By the pushing mechanism to push the rotating mechanism downward, not only the excess water between the outside of the sampling mechanism and the inner surface of the fixed cylinder is squeezed out, but also the lower part of the inner surface of the fixed cylinder is flushed, effectively preventing solid impurities from blocking the internal structure. At the same time, during the downward movement of the rotating mechanism, the sampling mechanism is sealed again to ensure that the collected water samples are not contaminated or leaked during the recovery process of the device, and the water samples are completely preserved for subsequent detection and analysis.

[0019] 2. By adjusting the inflation degree inside the second airbag, after the device reaches the predetermined depth, the pressure of the water at this depth is used to squeeze the second airbag, and then the sealing plate is pushed to move, realizing the opening and water inlet of the lower end of the fixed cylinder, ensuring sampling at an appropriate depth, and effectively preventing the device from entering water prematurely during the descent, ensuring the accuracy of the sampling depth. At the same time, the cooperation between the circular ring, the two telescopic rods, the two support rods and each structure can not only use the water pressure to open the sampling cylinder, but also cooperate with structures such as the hose, water pressure and push rod to seal the sampling cylinder, effectively preventing the water sample from leaking or being contaminated during the recovery process of the device, and can also use water to flush the filter plate, which can avoid the blockage of the filter plate by impurities and ensure the filtering effect of the filter plate when the device is used next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of the present invention;

[0021] Figure 2 is the overall internal structural schematic diagram of the present invention;

[0022] Figure 3 is the sectional structural schematic diagram of the fixed cylinder of the present invention;

[0023] Figure 4 is the structural schematic diagram of the moving mechanism of the present invention;

[0024] Figure 5 is the structural schematic diagram of the cooperation between the moving mechanism and the sealing mechanism of the present invention;

[0025] Figure 6 Schematic structural diagram of the rotating mechanism of the present invention;

[0026] Figure 7 Schematic structural diagram of the pushing mechanism of the present invention;

[0027] Figure 8 Partial structural schematic diagram of the pushing mechanism of the present invention;

[0028] Figure 9 Schematic structural diagram of the sampling mechanism of the present invention;

[0029] Figure 10 Schematic structural diagram of different overall states of the present invention;

[0030] Figure 11 For the present invention Figure 4 Enlarged structural schematic diagram at position A in

[0031] In the figure: 1, fixed cylinder; 11, towing 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, hard pipe; 43, telescopic pipe; 44, airbag two; 45, airbag three; 46, L-shaped plate; 5, sealing mechanism; 51, sealing plate; 511, chute; 52, fixing plate; 6, sampling mechanism; 61, sampling cylinder; 62, sealing plug; 7, rotating mechanism; 71, ring; 72, flexible pipe; 721, soft plug; 722, fixing rope; 73, telescopic rod; 74, rotating plate; 75, support rod; 76, L-shaped rod. Specific embodiments

[0032] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0033] Example 1, as Figure 1 and Figure 2 shown, an environmental protection engineering water quality detection and sampling device includes a fixed cylinder 1, 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 and slidably connected to the lower end of the fixed cylinder 1, the sealing mechanism 5 includes a sealing plate 51, moving mechanisms 4 are symmetrically and 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 adapted sealing mechanisms 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, and a pushing mechanism 2 is fixedly connected to the middle of the inner surface of the fixed cylinder 1.

[0034] When it is necessary to detect the water quality at different depths of a lake, by adjusting the parameters of the counterweight ring 3, the sampling depth of the overall device can be adjusted accordingly. When using the overall device for water quality sampling, the tension of the internal structures of the two moving mechanisms 4 is adjusted according to the parameters set for the counterweight ring 3. Subsequently, the whole is placed in water. When the overall structure descends to the predetermined depth, at this time, 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 convenient for the counterweight ring 3 to cooperate with the whole to quickly descend in water for sampling preparation.

[0036] The weight of the counterweight ring 3 needs to satisfy:

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

[0038] In the above formula, ρ 水 is the density of water, 1.0 * 10³ Kg / m³, V 装置 is the volume of water displaced by the entire device, F 气囊浮力 is the total buoyancy of all airbags, and F 密封板阻力 is the resistance measured experimentally for the sliding of the sealing plates 51 made of different materials. The sliding resistance of the sealing plates 51 used in this scheme is 5 - 10 N.

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

[0040] Moreover, the material of the above-mentioned counterweight ring 3 is 304 stainless steel commonly used in the prior art, with 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 squeezes the rotating mechanism 7 upward by the water, so that the sampling mechanism 6 can stably collect water samples. At the same time, due to the setting of the fixed cylinder 1, the solid impurities in the collected water samples can be filtered and blocked outside the fixed cylinder 1 to avoid damaging the equipment.

[0042] After sampling for a period of time, gas is continuously introduced into some structures of the pushing mechanism 2. Through the cooperation of the pushing mechanism 2, the water pressure above the rotating mechanism 7 is made close to the water pressure below. At the same time, gas is continuously introduced into some structures of the pushing mechanism 2, and the pushing mechanism 2 pushes the rotating mechanism 7 downward. Subsequently, during the process of the rotating mechanism 7 being pushed downward, the water on the inner surface of the fixed cylinder 1 is continuously squeezed downward. Immediately, the water between the outer part 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 flushed from the inside to the outside, avoiding the blockage of the internal structure of the fixed cylinder 1 by solid impurities blocked during the water intake sampling process;

[0043] Similarly, during the process of the rotating mechanism 7 being pushed downward, the sampling mechanism 6 can be sealed again, including the collected water sample.

[0044] Then the overall structure is stretched upward. After the overall device is taken out, the sampling mechanism 6 can be taken off as a whole for water quality detection.

[0045] During the operation of this embodiment, through the mutual cooperation of the two moving mechanisms 4 and the sealing mechanism 5, the seal of the lower end of the fixed cylinder 1 is automatically released when the device descends to a predetermined depth, and water can smoothly enter the fixed cylinder 1. At the same time, the sampling mechanism 6 in the fixed cylinder 1 stably collects water samples under the action of water pressure as the water surges in, improving the accuracy and reliability of sampling. By the pushing mechanism 2 pushing the rotating mechanism 7 downward, not only the excess water between the outer part of the sampling mechanism 6 and the inner surface of the fixed cylinder 1 is squeezed out, but also the lower part of the inner surface of the fixed cylinder 1 is flushed, effectively preventing the blockage of the internal structure by solid impurities. At the same time, during the downward movement of the rotating mechanism 7, the sampling mechanism 6 is sealed again to ensure that the collected water sample is not contaminated or leaked during the recovery process of the device, and the water sample is completely preserved for subsequent detection and analysis.

[0046] Embodiment 2. On the basis of Embodiment 1, this embodiment is to achieve the effect of opening and sealing the sampling cylinder 61 by using water pressure.

[0047] Refer to Figure 3 , a towing 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 sliding blocks 13 are symmetrically and fixedly connected to the lower end of the fixed cylinder 1.

[0048] One end of the above-mentioned towing 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 a lake, the length of the towing rope 11 is changed through the winch, so as to realize the up and down movement of the fixed cylinder 1 driving the overall structure.

[0049] Meanwhile, during the sampling process, the filter plate 12 is provided to prevent solid impurities from entering the inner surface of the fixed cylinder 1 during the sampling of different depths of the lake. Through the aperture setting of the filter plate 12, some plankton can enter the inner surface of the fixed cylinder 1 through the filter plate 12 and thus be collected, ensuring the integrity of water quality sampling and also facilitating the judgment of the ecological situation of the lake based on the water sample.

[0050] Refer to 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 two 44 is arranged on the inner surface of the fixed cage 41. A hard tube 42 is fixedly connected to the lower part of the outer surface of the airbag two 44. One end of the hard tube 42 away from the fixed cage 41 is fixedly connected to an airbag three 45. A telescopic tube 43 is arranged on the outer surface of the airbag three 45. One end of the telescopic tube 43 close to the outer surface of the fixed cylinder 1 is fixedly connected to an L-shaped plate 46. One end of 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] Refer to Figure 11 , a circular sealing ring is arranged at the connection between the telescopic tube 43 and the hard tube 42. The material of the circular sealing ring is fluororubber commonly used in the prior art. And through interference fit, the hard tube 42 and the circular sealing ring are dynamically sealed with the telescopic tube 43 to prevent water from seeping into the inside of the telescopic tube 43 from the gap between the telescopic tube 43 and the hard tube 42, and at the same time, it does not affect the telescopic operation of the telescopic tube 43;

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

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

[0054] Specifically, when preparing for sampling, a certain amount of gas is filled into the airbag two 44. At the same time, the inner surface of the airbag two 44 is communicated with the inner surface of the hard tube 42 and the inner surface of the airbag three 45. At the same time, the telescopic tube 43 cooperates with the L-shaped plate 46 to seal the outer surface of the airbag three 45, and there will be no water seepage.

[0055] The calculation formula for the gas filling amount inside the airbag two 44 is:

[0056] P0 = ρ 水 gh + △P 安全裕度

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

[0058] For example, when collecting samples at a water depth of 10 m, the inflation volume of the second airbag 44 is 0.8 L, and the initial inflation volume of the third airbag 45 is 0.2 L.

[0059] Combining the calculation formula for the internal inflation volume of the second airbag 44 and the weight calculation formula of the counterweight ring 3, the sampling depth can be freely adjusted.

[0060] Similarly, a check valve II is installed at one end of the hard pipe 42 close to the fixed cage 41, which only allows gas to flow from the second airbag 44 to the third airbag 45. The volume ratio of the second airbag 44 to the third airbag 45 is 3:1. To ensure that when the second airbag 44 is compressed by water pressure, the expansion volume of the third airbag 45 is sufficient to push the telescopic pipe 43 to move, and because the volume of the third airbag 45 is small, the internal air pressure rises rapidly, inhibiting the reverse flow of gas.

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

[0062] In the above, the second airbag 44 is another composite layer material commonly used in the prior art. Its outer layer is woven with unidirectional aramid fiber, and the inner layer is butyl rubber. The inner and outer layers cooperate to achieve high airtightness.

[0063] In the above, the material of the third airbag 45 is a combination of NBR and polyester fiber to ensure that the third airbag 45 can achieve axial expansion.

[0064] When the overall device is placed in water and descends to the predetermined depth, at this time, the water at this depth continuously enters the inside of the fixed cage 41 through the holes of the fixed cage 41, and then squeezes the second airbag 44, so that the gas inside the second airbag 44 enters the inner surface of the third airbag 45 through the inner surface of the hard pipe 42. Due to the sealing of the outer surface of the third airbag 45 by the cooperation of the telescopic pipe 43 and the L-shaped plate 46, the third airbag 45 gradually expands when the second airbag 44 is compressed;

[0065] During the expansion of the third airbag 45, at the same time, due to the setting of the telescopic pipe 43, the telescopic pipe 43 can only move to the right and cannot move forward, backward, or up and down. Then the expanding third airbag 45 will continuously push the end of the telescopic pipe 43 away from the L-shaped plate 46 and move to the side away from the outer surface of the fixed cylinder 1.

[0066] Refer to Figure 5 , the sealing mechanism 5 includes a fixing plate 52 fixedly connected to the end of the telescopic pipe 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] Further, when the end of the telescopic tube 43 away from the L-shaped plate 46 is continuously pushed by the inflated airbag three 45, at this time, the telescopic tube 43 will push the fixed plate 52 in the same direction, and then drive the sealing plate 51 to move in the same direction. At this time, the non-sealed end of the two sealing plates 51 close to each other no longer seals the lower end of the fixed cylinder 1.

[0068] Refer to Figure 5 , a chute 511 is opened at the upper end of the sealing plate 51, and the inner surface of the chute 511 is slidably connected to the outer surface of the slider 13. A sealing coating is evenly sprayed on the end of the sealing plate 51 away from the fixed plate 52.

[0069] When the overall device has not reached the predetermined depth, at this time, due to the cooperation of the sealing coatings, the two sealing plates 51 cooperate to always seal the lower end of the fixed cylinder 1.

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

[0071] Further, when the sealing plate 51 is driven by the fixed plate 52 to slide to the side away from the outer surface of the fixed cylinder 1, at this time, through the cooperation of the slider 13 and the inner surface of the chute 511, the sealing plate 51 moves horizontally.

[0072] When water samples at different depths need to be collected, according to the parameters of the counterweight ring 3, the degree of inflation of the airbag two 44 is adjusted to ensure that after reaching the predetermined depth, the water at this depth squeezes the airbag two 44 to achieve the effect of pushing the sealing plate 51 to move. At the same time, due to the setting of the counterweight ring 3, the overall device descends in water at a relatively fast speed. During the descent, the water pressure on the airbag two 44 is not sufficient to separate the two sealing plates 51. After reaching the predetermined depth, the water at this depth gradually squeezes the airbag two 44, thereby separating the two sealing plates 51, and further making the inner surface of the fixed cylinder 1 no longer sealed.

[0073] At the same time, through the gas filled in the airbag two 44 before water inlet, when the airbag two 44 is compressed until its internal air pressure is the same as the water pressure, at this time, the two sealing plates 51 cooperate to make the lower end of the fixed cylinder 1 in an open state.

[0074] Refer to Figure 6, the rotating mechanism 7 includes a ring 71 slidably connected to the inner surface of the fixed cylinder 1. One side of the upper end of the ring 71 is fixedly connected to a hose 72. The lower end of the ring 71 is symmetrically and fixedly connected to telescopic rods 73. The lower ends of the two telescopic rods 73 are rotatably connected to a rotating plate 74. One side of the upper ends of the two rotating plates 74 close to each other is rotatably connected to a support rod 75. The front and rear ends of the two rotating plates 74 are rotatably connected to L-shaped rods 76. The two L-shaped rods 76 on the same side are fixedly connected to the inner surface of the fixed cylinder 1 together.

[0075] When the two sealing plates 51 gradually slide away from each other, at this time, 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. Immediately, 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, at the same time, it will squeeze the air between the inner surface of the fixed cylinder 1 and the upper end of the ring 71, and at this time, one end of the hose 72 fixedly connected to the ring 71 is driven upward by the ring 71 at the same time.

[0077] Similarly, during the process of the ring 71 being pushed upward, it will drive the upper ends of the two telescopic rods 73 to move upward at the same time. At this time, the two telescopic rods 73 are stretched. When the two telescopic rods 73 are stretched to the maximum, at this time, 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 this depth. Furthermore, 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] During the upward movement of the two telescopic rods 73, it drives the rotating plate 74 to rotate. Through the cooperation of the two L-shaped rods 76 on the same side and the rotating plate 74, the two rotating plates 74 rotate in a state where the ends away from each other move upward and the other ends move downward. Immediately, during the process of the two rotating plates 74 rotating downward at the ends close to each other, it drives the two support rods 75 to descend until the gas between the upper end of the ring 71 and the inner surface of the fixed cylinder 1 is compressed to a gas pressure equal to the water pressure at this depth. At this time, the ring 71 no longer moves, and the support rod 75 is no longer driven to descend.

[0079] Refer to 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. The inner surface of the end of the hose 72 away from the ring 71 is provided with a soft plug 721. The outer surface of one side of the soft plug 721 away from the hose 72 is fixedly connected to a fixing rope 722. 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 hose 72 is sealed by the soft plug 721, and the fixing rope 722 cooperates to fix the fixing rope 722 to the outer surface of the fixed cylinder 1.

[0081] When the overall device enters the lake and descends to prepare for sampling, the soft plug 721 always seals the inner surface of the hose 72.

[0082] Similarly, when the circular ring 71 is pushed upward by water and moves upward, the hose 72 is driven upward, and at the same time, the soft plug 721 still seals the inner surface of the hose 72.

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

[0084] Further, when the two support rods 75 are driven to move downward, the two support rods 75 cooperate to drive the sealing plug 62 to descend, 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] Refer to Figure 7 and Figure 8 , the pushing mechanism 2 includes arc-shaped plates 23 symmetrically and fixedly connected to the middle part of the inner surface of the fixed cylinder 1. The lower ends of the two arc-shaped plates 23 are both fixedly connected with telescopic boxes 24. The lower ends of the two telescopic boxes 24 are both symmetrically and fixedly connected with push rods 27. Air bags one 26 are arranged on the inner surfaces of the two telescopic boxes 24. Water pipes two 22 are fixedly connected to the upper parts of the outer surfaces of the two air bags one 26. The ends of the two water pipes two 22 far away from the air bags one 26 are fixedly connected together with a water pipe one 21. A water pipe three 25 is fixedly connected to the middle part of the outer surface of the water pipe two 22 on the front side of the inner surface of the fixed cylinder 1. The end of the water pipe three 25 far away from the water pipe two 22 is fixedly connected with the hose 72. A check valve one 251 is fixedly connected to the end of the water pipe three 25 far away from the water pipe two 22. The inner surface of the check valve one 251 is fixedly connected with the end of the hose 72 close to the inner surface of the fixed cylinder 1. The outer surfaces of the two water pipes two 22 penetrate through the top wall of the inner surface of the fixed cylinder 1 and extend to the outside of the fixed cylinder 1.

[0086] The above two water pipes two 22 cooperate with the water pipe one 21. During the sampling process, the water pipe one 21 is always fixedly connected to the outer surface of the towing rope 11 and does not affect the ventilation of the water pipe one 21. At the same time, the end of the water pipe one 21 far away from the two water pipes two 22 is connected to an external air pump. The air pump is a commonly used inflating and deflating tool in the prior art and is connected to one end of the water pipe one 21, which is convenient for inflating the two air bags one 26 and the water pipe three 25 through the water pipe one 21 and the two water pipes two 22.

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

[0088] When the whole device is placed at a certain depth in the lake, after a period of automatic sampling, the inner surface of the water pipe 21 is continuously inflated by an air pump commonly used in the prior art, and then the inflated gas is transported downward through the cooperation of the two water pipes 22.

[0089] Further, refer to Figure 10 , when part of the gas enters the inner surface of the water pipe 25 through the inner surface of the water pipe 22, and then enters the inner surface of the hose 72 through the one-way valve 251, at this time, the air pressure on the inner surface of the hose 72 increases, and the soft plug 721 will be gradually pushed outward until the soft plug 721 no longer seals the inner surface of the 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 detaching;

[0090] While part of the gas enters the water pipe 25, some gas enters the inner surfaces of the two air bags 26 through the two water pipes 22. Immediately, the air pressure inside the two air bags 26 becomes larger, and the two air bags 26 gradually expand, and then downwardly squeeze the lower ends of the adapted telescopic boxes 24. Immediately, the two telescopic boxes 24 will push down the two push rods 27 fixed to the telescopic boxes 24;

[0091] Furthermore, the four push rods 27 will push down the ring 71.

[0092] After the soft plug 721 no longer seals the inner surface of the hose 72, the water on the outer surface of the fixing cylinder 1 enters the inner surface of the hose 72, which will make the water pressure at the upper end of the ring 71 basically the same as the water pressure at the lower end. Immediately, the air pressure between the upper end of the ring 71 and the inner surface of the fixing cylinder 1, together with the four push rods 27, simultaneously push down the ring 71, taking advantage of the external water pressure to avoid excessive power required to push down the ring 71.

[0093] During the process of the ring 71 being pushed downward, through the cooperation of the two telescopic rods 73 and the rotating plate 74, the rotating plate 74 rotates in the reverse direction, which can drive the two support rods 75 upward during the downward movement of the ring 71, thereby driving the sealing plug 62 upward to seal the inner surface of the sampling cylinder 61.

[0094] At the same time, during the downward movement of the ring 71, the water between the lower end of the ring 71 and the inner surface of the fixing cylinder 1 and the outer surface of the sampling cylinder 61 will be continuously squeezed downward. This part of the water is squeezed out through the filter plate 12, and the pores of the filter plate 12 are washed from top to bottom, which can wash away the solid impurities blocked at the lower end of the filter plate 12 during the sampling water intake process, achieving a self-cleaning.

[0095] Subsequently, when the ring 71 is pushed downward 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. Subsequently, the whole device is pulled upward by the winch cooperating with the towing rope 11, and at this time, the water pipe 21 is wound up.

[0096] Therefore, in this solution, by adjusting the inflation degree inside the second airbag 44, after the device reaches the predetermined depth, the pressure of the water at this depth is used to squeeze the second airbag 44, thereby pushing the sealing plate 51 to move, realizing the opening and water inlet at the lower end of the fixed cylinder 1, ensuring sampling at an appropriate depth, and effectively preventing the device from entering water prematurely during the descent process, guaranteeing the accuracy of the sampling depth. At the same time, the cooperation between the circular ring 71, the two telescopic rods 73, the two support rods 75 and each structure can not only use the water pressure to open the sampling cylinder 61, but also cooperate with structures such as the hose 72, the water pressure and the push rod 27 to seal the sampling cylinder 61, effectively preventing the water sample from leaking or being contaminated during the recovery process of the device, and can also use water to wash the filter plate 12, which can avoid impurities from clogging the filter plate 12 and ensure the filtering effect of the filter plate 12 when the device is used next time.

[0097] The above shows and describes 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 by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An environmental protection engineering water quality detection sampling device, including a fixing cylinder (1), characterized by: A counterweight ring (3) is fixedly connected to the middle of the outer surface of the fixed cylinder (1). Symmetrically, a sealing mechanism (5) is slidably connected to the lower end of the fixed cylinder (1). Symmetrically, a moving mechanism (4) is 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 adapted sealing mechanisms (5). A sampling mechanism (6) is fixedly connected to the top wall of the inner surface of the fixed cylinder (1). The lower part of the outer surface of the sampling mechanism (6) is slidably connected to a rotating mechanism (7). A pushing mechanism (2) is fixedly connected to the middle of the inner surface of the fixed cylinder (1).

2. The water quality detection and sampling device for environmental protection engineering according to claim 1, characterized in that: A towing 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). Symmetrically, sliders (13) are fixedly connected to the lower end of the fixed cylinder (1).

3. An environmental protection project water quality detection sampling device according to claim 2, characterized in that: The moving mechanism (4) includes a fixed cage (41) fixedly connected to the lower end of the counterweight ring (3). An airbag two (44) is arranged on the inner surface of the fixed cage (41). A hard tube (42) is fixedly connected to the lower part of the outer surface of the airbag two (44). One end of the hard tube (42) away from the fixed cage (41) is fixedly connected to an airbag three (45). A telescopic tube (43) is arranged on the outer surface of the airbag three (45). One end of the telescopic tube (43) close to the outer surface of the fixed cylinder (1) is fixedly connected to an L-shaped plate (46). The end of 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).

4. An environmental protection engineering water quality detection sampling device according to claim 3, characterized in that: The sealing mechanism (5) includes a fixing plate (52) fixedly connected to the end of the telescopic tube (43) away from the L-shaped plate (46). A sealing plate (51) is fixedly connected to the lower end of the fixing plate (52).

5. The water quality detection sampling device for environmental protection engineering according to claim 4, wherein: A chute (511) is formed in the upper end of the sealing plate (51). The outer surface of the slider (13) is slidably connected to the inner surface of the chute (511). A sealing coating is evenly sprayed on the end of the sealing plate (51) away from the fixing plate (52).

6. The water quality detection and sampling device for environmental protection projects 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). A sealing plug (62) is arranged in the lower part of the inner surface of the sampling cylinder (61).

7. An environmental protection engineering water quality detection sampling device according to claim 6, characterized in that: The rotating mechanism (7) includes a ring (71) 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). Symmetrically, telescopic rods (73) are fixedly connected to the lower end of the ring (71). The lower ends of the two telescopic rods (73) are rotatably connected to a rotating plate (74). The upper ends of the two rotating plates (74) on the side close to each other are rotatably connected to a support rod (75). The upper ends of the two support rods (75) are jointly fixedly connected to the lower end of the sealing plug (62). The front end and the rear end of each of the two rotating plates (74) are rotatably connected to an L-shaped rod (76). The two L-shaped rods (76) on the same side are jointly fixedly connected to the inner surface of the fixed cylinder (1).

8. An environmental protection engineering water quality detection sampling device according to claim 7, characterized in that: One end of the hose (72) away from the ring (71) penetrates through the inner surface of the fixing cylinder (1) and extends to the outside of the fixing cylinder (1). A soft plug (721) is arranged 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 one side of the soft plug (721) away from the hose (72). One end of the fixing rope (722) away from the soft plug (721) is fixedly connected to the outer surface of the fixing cylinder (1).

9. The water quality detection sampling device for environmental protection engineering according to claim 8, characterized in that: The pushing mechanism (2) includes arc-shaped plates (23) symmetrically and fixedly connected to the middle of the inner surface of the fixing cylinder (1). Telescopic boxes (24) are fixedly connected to the lower ends of the two arc-shaped plates (23). Push rods (27) are symmetrically and fixedly connected to the lower ends of the two telescopic boxes (24). Air bags one (26) are arranged on the inner surfaces of the two telescopic boxes (24). Water pipes two (22) are fixedly connected to the upper parts of the outer surfaces of the two air bags one (26). One end of the two water pipes two (22) away from the air bags one (26) is fixedly connected to a water pipe one (21). A water pipe three (25) is fixedly connected to the middle of the outer surface of the water pipe two (22) on the front side of the inner surface of the fixing cylinder (1). One end of the water pipe three (25) away from the water pipe two (22) is fixedly connected to the hose (72).

10. An environmental protection engineering water quality detection sampling device according to claim 9, characterized in that: A one-way valve one (251) is fixedly connected to one end of the water pipe three (25) away from the water pipe two (22). The inner surface of the one-way valve one (251) is fixedly connected to one end of the hose (72) close to the inner surface of the fixing cylinder (1). The outer surfaces of the two water pipes two (22) penetrate through the top wall of the inner surface of the fixing cylinder (1) and extend to the outside of the fixing cylinder (1).

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