Water quality detection device and detection method in water conservancy project

Abstract

The invention discloses a water quality detection device and method in a water conservancy project, and belongs to the technical field of water quality detection equipment.The water quality detection device and method in the water conservancy project comprise a position adjusting mechanism, a first roller and a second roller, and the first roller and the second roller are meshed with each other through tooth grooves formed in the circumferential side walls; and a cable I and a cable II are respectively wound on the outer sides of the rotating roller I and the rotating roller II in opposite directions. Through the arrangement of the middle plate, the position adjusting mechanism, the sampling mechanism and the pusher, the middle plate enables the equipment to float on the water surface, the equipment can autonomously advance on the water surface under the work of the sampling mechanism and the pusher and quickly move to a sampling position, and the position adjusting mechanism can lower the sampling mechanism to a deep water area; water quality detection is carried out through the sampling mechanism and the sampling sensor, the pusher enables water to continuously flow through the sampling sensor and can push equipment to advance for continuous sampling, and the working part of the sampling sensor is automatically cleaned in the process to ensure the detection precision.

Description

Technical Field

[0001] This invention belongs to the technical field of water quality testing equipment, specifically relating to a water quality testing device and testing method for water conservancy projects. Background Technology

[0002] Reservoirs and hydropower stations in water conservancy projects are the main sources of domestic and industrial water supply. To ensure that the water quality of reservoirs and hydropower stations is under control, testing equipment is used regularly to test the water quality and upload the test signals for water quality analysis. This provides reference data for subsequent water treatment by waterworks and water purification plants, so that water purification plants can adjust their water purification strategies in a timely manner to ensure that the water purification efficiency and the output water quality meet the usage standards.

[0003] Chinese patent CN222124815U discloses a water quality testing and sampling device for water conservancy engineering construction. This device can adjust the water sampling depth according to the depth of the water body where the water conservancy project is located and the sampling requirements. Under the control of the sinking control unit, multiple sampler components can be continuously lowered into the water body at once to simultaneously sample different water layers, making it more efficient and allowing for deeper sampling. However, when continuous water quality testing is required for a large area of ​​water sources, the inefficiency of this testing method becomes very apparent. Therefore, this paper provides a water quality testing device and method for water conservancy engineering. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a water quality testing device and testing method for water conservancy projects.

[0005] The technical solution adopted to solve the above technical problems is:

[0006] A water quality testing device for water conservancy projects, comprising:

[0007] The middle plate, wherein a float is installed at the bottom edge of the middle plate;

[0008] The positioning mechanism includes a rotating roller 1 and a rotating roller 2. The rotating roller 1 and the rotating roller 2 mesh with each other through toothed grooves opened on the circumferential sidewalls. Cable 1 and cable 2 are wound on the outer sides of the rotating roller 1 and the rotating roller 2 in opposite directions, respectively.

[0009] The sampling mechanism includes an end shell and a three-way shell. The three-way shell is installed at the lower ends of cable one and cable two. The three-way shell has independent water passage one, water passage two and water passage three. The inlet of water passage two and water passage three is respectively equipped with sampling sensor one and sampling sensor two. The three-way shell has a bypass channel communicating with water passage one. The end shell has a nozzle communicating with the bypass channel at the corresponding sampling sensor one and sampling sensor two. Water passage one, water passage two and water passage three are connected to the drainage channel through a connecting cavity.

[0010] The pusher includes a telescopic rod, which is centrally fixed in the drainage channel. A connecting rod is installed at the free end of the telescopic rod. Pumper 1 and Pumper 2 are equidistantly arranged along the connecting rod along the axial direction. A diversion frame is provided between Pumper 1 and Pumper 2. The diversion frame is fixedly installed at the entrance of the bypass channel.

[0011] Furthermore, the diversion frame includes a fixed ring, an inner ring, and an outer ring. A relay shell is provided at the edge of the fixed ring. The relay shell has a port facing the pump. The relay shell is fixedly installed on the side wall at the entrance of the bypass channel. The fixed ring is connected to the outer ring through an elastic frame. The outer ring is coaxially fixed to the inner ring through a support rod.

[0012] The above technical solution discloses a specific configuration of a diversion frame. During the normal pushing phase, the fixed ring and the outer ring are separated from each other by an elastic frame, so that the water flow between the inner ring and the outer ring can be separated to both sides when it impacts the fixed ring, and flow smoothly through the inner ring position to enter the upstream of the second pump, reducing the forward resistance caused by the diversion frame.

[0013] Furthermore, the inner diameter of the fixed ring is equal to the inner diameter of the inner ring, and an annular gap is formed between the outer wall of the inner ring and the inner wall of the outer ring, with the port completely located within the coverage area of ​​the annular gap.

[0014] Through the above technical solution, during the sampling stage, the pump squeezes the elastic frame to shorten it, which allows the inner and outer rings to be pressed tightly against the end face of the fixed ring. At this time, the water flow entering the annular gap will continuously enter the relay shell through the port, and then be pressurized through the nozzle to the working parts of sampling sensor one and sampling sensor two for non-contact cleaning. This avoids wear on the working parts of sampling sensor one and sampling sensor two, and also ensures the cleanliness of the working parts of sampling sensor one and sampling sensor two, thus avoiding affecting the detection accuracy.

[0015] Furthermore, the outer circumferential walls of pump one and pump two are respectively provided with ring one and ring two. Ring one is in sliding contact with the inner wall of water passage one, and ring two is in sliding contact with the inner wall of drainage passage. The width of ring two is equal to the width of the connecting cavity.

[0016] Through the above technical solution, to ensure the controllability of the water flow direction, the outer circumference of the first ring is the same size as the inner wall of the first water passage, so that the water flow will not flow back in the gap between the pump and the inner wall of the first water passage after being pushed by the pump. The second ring can completely isolate the first water passage and the connecting cavity during the pushing stage, allowing the water flow in the first water passage to enter the drainage channel. During the sampling stage, the second ring is inserted into the drainage channel so that the water in the connecting cavity can be pushed into the drainage channel and discharged by the pump. Moreover, the second ring is in contact with the inner wall of the drainage channel, which can prevent the water flow in the drainage channel from flowing back in the gap between the second ring and the inner wall of the drainage channel, thus making the water flow direction controllable.

[0017] Furthermore, the end shell is located at the inlet of water passage one, water passage two, and water passage three. A guide groove communicating with the side passage is opened in the middle of the end shell. The nozzles are arranged in a ring array at the inlet of water passage two and water passage three. The nozzles are communicating with the guide groove. The three-way shell is inserted and combined with the end shell. A filter cover is provided at the end of the end shell facing away from the three-way shell. The filter cover is fixed to the three-way shell by a tie rod. A mesh plate is provided in the middle of the filter cover.

[0018] Through the above technical solution, in order to ensure the stable operation of pushing and sampling, the end shell is installed at the water inlet so that the nozzle is close to the working parts of sampling sensor one and sampling sensor two, so as to facilitate the smooth operation of the cleaning work. The filter cover blocks large solid impurities before the water flows in, so as to avoid damage to the internal sampling sensor working parts and pump. Moreover, the plug-in combination method allows for quick disassembly by workers by removing the nut at the end of the pull rod to quickly clean the internal components, even if there is a problem of small solid impurities accumulating later. This makes maintenance convenient.

[0019] Furthermore, the adjustment mechanism also includes cable three and cable four. The rotating roller one is divided into interval one, interval two and interval three along the axial direction. Cable one, cable three and cable four are respectively wound in interval one, interval two and interval three. The lower ends of cable one, cable two, cable three and cable four are respectively equipped with connecting sleeves. The connecting sleeves are coaxially sleeved on the outside of the pull rod.

[0020] With the above technical solution, in order to simplify the pushing and sampling process, after the positioning mechanism releases cable one and cable two for deep sampling, cable three and cable four are set to stabilize the horizontal position of the sampling mechanism. In this way, the sampling mechanism can be switched to the pushing state without retracting the sampling mechanism. The upper middle plate is moved forward synchronously by the traction of the cable and directly moves to the next sampling position, so that sampling at the same depth position can be performed without repeating the operation of retracting and extending the cable.

[0021] Furthermore, the adjustment mechanism also includes a reversing frame, which is fixed on the top surface of the middle plate and has corresponding holes for cable one, cable two, cable three and cable four respectively. The middle plate has through holes corresponding to cable one, cable two, cable three and cable four respectively.

[0022] With the above technical solution, to ensure that the cable does not wear abnormally, the top of the commutator is an idler wheel. The idler wheel has an annular groove in the middle of its circumferential sidewall, which can hold the cable to prevent it from falling off and can also prevent sliding wear through rolling support. The inner diameter of the through hole is larger than the cable size, so an anti-wear sleeve can be installed to further reduce the surface wear of the cable.

[0023] Furthermore, an anti-tangling mechanism is installed on the outer side of the first, second, third, and fourth cables. The anti-tangling mechanism is located below the middle plate and includes a cross. The end of the cross is provided with a round hole that mates with the first, second, third, and fourth cables. A permanent magnet is embedded in the middle of the cross, and the upper and lower stacked permanent magnets repel each other magnetically.

[0024] By employing the above technical solution, to prevent excessively long cables from tangling together when not being retracted, an anti-tangling mechanism is installed on the outside of the cables. This mechanism can spread the four cables apart. Furthermore, multiple crosses are set together and separated by permanent magnets, creating a long overhead support along the height of the cables. This further enhances the ability to prevent the cables from twisting and tangling. When the cables are retracted, the multiple crosses are pressed against the bottom of the middle plate. At this time, the multiple crosses overcome magnetic repulsion and move closer together under the tension of the cables, making retraction convenient. When the cables are released again, the multiple crosses will separate and unfold again. The passive support structure is convenient and stable to use.

[0025] Furthermore, a frame is fixedly installed on the bottom surface of the middle plate, an energy storage device is installed on the top of the frame, a remote sensing module is installed at the top edge of the middle plate, a photovoltaic panel is suspended on the top of the middle plate, an inverter is installed at the lower end of the photovoltaic panel, and the inverter is fixedly installed on the top surface of the middle plate.

[0026] With the above technical solution, for long-distance use, it is not necessary to use onshore power supply. The equipment can stay on the water surface for a long time and use photovoltaic power supply. Moreover, the remote sensing module can receive and transmit sampling control signals and upload sampling results. It only needs to be docked for maintenance, making it more flexible to use.

[0027] A water quality testing method for water conservancy projects includes the following steps:

[0028] The float allows the middle plate to float on the water surface. The adjustment mechanism can change the distance the sampling mechanism penetrates into the water surface by extending and retracting cable one and cable two. When moving, the telescopic rod extends, and pump one separates the connecting cavity from the drainage channel. Pump two is separated from the diverter frame. Pump one and pump two make water flow unidirectionally in water passage one to propel the entire device. During detection, the telescopic rod shortens, and pump two contacts the diverter frame to connect water passage one to the nozzle via a bypass channel and guide groove. Pump one connects the connecting cavity to the drainage channel. Pump one makes water flow through water passage two and water passage three to contact sampling sensor one and sampling sensor two. Pump one, together with the diverter frame, makes the water in water passage one pressurized and flush the working parts of sampling sensor one and sampling sensor two through the nozzle.

[0029] The beneficial effects of this invention are as follows:

[0030] (1) The present invention uses a middle plate, an adjustment mechanism, a sampling mechanism and a pusher. The middle plate makes the device float on the water surface and can move forward autonomously on the water surface under the operation of the sampling mechanism and the pusher. It can quickly move to the sampling position. The adjustment mechanism can lower the sampling mechanism into the deep water area. Water quality is detected through the sampling mechanism and the sampling sensor. In addition, the pusher makes the water flow continuously through the sampling sensor and can push the device forward to perform continuous sampling. During the process, the working part of the sampling sensor is cleaned automatically to ensure the detection accuracy.

[0031] (2) Through the optimization of the diversion frame, the split structure of the diversion frame provides a smooth flow channel for water flow during normal pushing, avoiding excessive obstruction of water flow. During sampling, the water flow in the outer ring of the water passage is guided to the working part of the sampling sensor for cleaning operation, while the water flow through the working part of the sampling sensor and the middle part of the water passage still flows horizontally along the water passage for pushing the equipment forward, without affecting normal forward movement.

[0032] (3) By setting an anti-tangling mechanism, the present invention separates the support of cable one and cable two during the sampling stage. With the addition of cable three and cable four, the anti-tangling mechanism automatically unfolds between the middle plate and the sampling mechanism after the cable is extended, forming a continuous overhead support structure. This ensures that the cables will not tangle with each other and also ensures the verticality of the cables, preventing excessive deviation in sampling depth due to excessive bending of the cables. The magnetic unfolding method also ensures that the cable can be extended and retracted autonomously and conveniently. Attached Figure Description

[0033] Figure 1 This is an overall structural diagram of the present invention;

[0034] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0035] Figure 3 This is a schematic diagram of the disassembly process of the present invention with the photovoltaic panel removed;

[0036] Figure 4 This is a schematic diagram of the structure between the positioning mechanism, the anti-tangling mechanism, and the sampling mechanism of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure between the anti-tangling mechanism and the cable of the present invention;

[0038] Figure 6 This is a schematic diagram showing the position between the sampling mechanism and the pusher of the present invention;

[0039] Figure 7 This is a schematic diagram of the pusher of the present invention;

[0040] Figure 8 This is a cross-sectional schematic diagram of the sampling mechanism of the present invention;

[0041] Figure 9 This is a schematic diagram of the state between the sampling mechanism and the pusher of the present invention. Figure 1 ;

[0042] Figure 10 This is a schematic diagram of the state between the sampling mechanism and the pusher of the present invention. Figure 2 ;

[0043] Figure 11 yes Figure 9 A cross-sectional schematic diagram of a portion of the pusher structure in the image;

[0044] Figure 12 yes Figure 10 A cross-sectional schematic diagram of a local structure of the pusher in the image.

[0045] Reference numerals: 1. Middle plate; 11. Frame; 2. Float; 3. Remote sensing module; 4. Positioning mechanism; 41. Cover; 42. Rotating roller one; 421. Spacing one; 422. Spacing two; 423. Spacing three; 43. Cable one; 44. Rotating roller two; 45. Cable two; 46. Cable three; 47. Cable four; 48. Commutator; 49. Connecting sleeve; 5. Energy storage device; 6. Photovoltaic panel; 61. Inverter; 7. Anti-entanglement mechanism; 71. Cross; 72. Permanent magnet; 8. Sampling mechanism; 81. Filter cover; 82. End shell; 822. Nozzle; 823. Guide groove; 83. 84. Pull rod; 84. T-shaped housing; 841. Water passage one; 842. Bypass passage; 843. Connecting cavity; 844. Drainage passage; 845. Water passage two; 846. Water passage three; 85. Sampling sensor one; 86. Sampling sensor two; 9. Pusher; 91. Telescopic rod; 92. Pump one; 921. Ring one; 93. Pump two; 931. Ring two; 94. Diverter frame; 941. Fixed ring; 942. Relay housing; 943. Elastic frame; 944. Inner ring; 945. Outer ring; 946. Support rod; 947. Port; 95. Connecting rod. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0047] like Figure 1 - Figure 12 As shown, this embodiment provides a water quality testing device for water conservancy projects. To address the practical problems of insufficient sampling flexibility and cumbersome use and maintenance procedures in existing equipment, a specific configuration is provided, including:

[0048] A medium plate 1 is made of lightweight materials, such as acrylic. A float 2 is installed at the bottom edge of the medium plate 1. The hollow structure can provide sufficient buoyancy to make the equipment float on the water surface.

[0049] An adjustment mechanism 4 has a rotating roller 42 and a rotating roller 44. The top of the rotating roller 42 and the rotating roller 44 are covered with a cover 41 for protection. The rotating roller 42 and the rotating roller 44 mesh with each other through the toothed grooves opened in the circumferential sidewalls. The rotating roller 42 is connected to a drive motor as the power source for forward and reverse rotation. The rotating roller 42 and the rotating roller 44 can be arranged side by side and rotate in opposite directions. The outer sides of the rotating roller 42 and the rotating roller 44 are respectively wound with cable 43 and cable 45 in opposite directions. The cable 43 and the cable 45 are armored cables with wires wound inside, which can serve as both ropes and cables.

[0050] The sampling mechanism 8 includes an end shell 82 and a three-way shell 84. The three-way shell 84 is installed at the lower ends of cable 1 43 and cable 2 45 and is suspended below the middle plate 1. The three-way shell 84 has independent water passage channels 1 841, 2 845, and 3 846. Sampling sensor 1 85 and sampling sensor 2 86 are respectively installed at the inlet of water passage channels 2 845 and 3 846. The water entering water passage channels 2 845 and 3 846 is detected by sampling sensors 1 85 and 2 86 to determine its quality. Sampling sensor 1 85 is a conductivity sensor used for online monitoring of dissolved substances in the water. The total solids content is measured by sampling sensor 2 86, which is a turbidity sensor used to detect the turbidity of water online. Sampling sensor 1 85 and sampling sensor 2 86 are connected to the power supply and data acquisition unit above the middle plate 1 through wires in cable 1 43 and cable 2 45 for continuous operation. The three-way shell 84 is provided with a bypass channel 842 that communicates with water passage 1 841. The end shell 82 is provided with a nozzle 822 that communicates with the bypass channel 842 at the corresponding sampling sensor 1 85 and sampling sensor 2 86. Water passage 1 841, water passage 2 845 and water passage 3 846 are connected to the drainage channel 844 through the connecting cavity 843.

[0051] A pusher 9 includes a telescopic rod 91, which is a waterproof electro-hydraulic actuator that can be electrically controlled to extend and retract. The telescopic rod 91 is fixed in the center of the drainage channel 844. A connecting rod 95 is installed at the free end of the telescopic rod 91. Pumps 92 and 93 are equidistantly arranged along the connecting rod 95 along the axial direction. Pumps 92 and 93 can rotate in both directions to provide forward and backward direction selection. A diversion frame 94 is provided between pumps 92 and 93. The diversion frame 94 is fixedly installed at the entrance of the bypass channel 842.

[0052] The equipment operates by following these steps:

[0053] Reference Figure 2 , Figure 9 and Figure 10The float 2 makes the middle plate 1 float on the water surface. The adjustment mechanism 4 can change the distance of the sampling mechanism 8 into the water surface by retracting and extending cable 1 43 and cable 2 45. When moving, the telescopic rod 91 extends, and pump 1 92 separates the connecting cavity 843 from the drainage channel 844. Pump 2 93 is separated from the diversion frame 94. Pump 1 92 and pump 2 93 make the water flow unidirectionally in the water passage 1 841 to move the entire equipment. When testing, the telescopic rod 91 shortens, and pump 2 93... The contact diversion frame 94 connects the water passage 1 841 to the nozzle 822 via the bypass channel 842 and the guide groove 823. The pump 1 92 connects the connecting cavity 843 to the drainage channel 844. The pump 1 92 causes water to flow through the water passage 2 845 and the water passage 3 846 to contact the sampling sensor 1 85 and the sampling sensor 2 86. The pump 1 92, in conjunction with the diversion frame 94, causes the water in the water passage 1 841 to be pressurized and flushed through the nozzle 822 to the working parts of the sampling sensor 1 85 and the sampling sensor 2 86.

[0054] In a further embodiment, a specific configuration of the diversion frame 94 is disclosed, which, during the normal pushing phase, refers to... Figure 9 The diversion frame 94 includes a fixed ring 941, an inner ring 944, and an outer ring 945. A relay shell 942 is provided at the edge of the fixed ring 941. The relay shell 942 has a port 947 on the side facing the second pump 93. The relay shell 942 is fixedly installed on the side wall at the inlet of the bypass channel 842. The fixed ring 941 is connected to the outer ring 945 through an elastic frame 943. The outer ring 945 is coaxially fixed to the inner ring 944 through a support rod 946. The fixed ring 941 and the outer ring 945 are separated from each other by the elastic frame 943, so that the water flow between the inner ring 944 and the outer ring 945 can be separated to both sides when it impacts the fixed ring 941, and flow smoothly through the position of the inner ring 944 to enter the upstream of the second pump 93, reducing the forward resistance caused by the diversion frame 94.

[0055] In a further embodiment, the inner diameter of the fixed ring 941 is equal to the inner diameter of the inner ring 944, and an annular gap is formed between the outer wall of the inner ring 944 and the inner wall of the outer ring 945. The port 947 is completely covered by the annular gap. During the sampling phase, the reference... Figure 10 Pump 92 compresses the elastic frame 943, shortening it. This allows the inner ring 944 and outer ring 945 to be pressed tightly against the end face of the fixed ring 941. At this time, the water flowing into the annular gap will continuously enter the relay housing 942 through port 947, and then be pressurized through nozzle 822 to the working parts of sampling sensor 1 85 and sampling sensor 2 86 for non-contact cleaning. This avoids wear on the working parts of sampling sensor 1 85 and sampling sensor 2 86, and also ensures the cleanliness of the working parts of sampling sensor 1 85 and sampling sensor 2 86, thus avoiding affecting the detection accuracy.

[0056] In a further embodiment, to ensure that the direction of water flow is controllable, refer to Figure 7 Pump 1 92 and Pump 2 93 are respectively provided with ring 1 921 and ring 2 931 on their outer circumferential walls. Ring 1 921 slides in contact with the inner wall of water passage 1 841, and ring 2 931 slides in contact with the inner wall of drainage passage 844. The width of ring 2 931 is equal to the width of the connecting cavity 843. The outer circumferential wall of ring 1 921 has the same size as the inner wall of water passage 1 841, so that the water flow pushed by pump 1 92 will not flow back in the gap between pump 1 92 and the inner wall of water passage 1 841. The setting of ring 2 931, in During the pushing phase, the water passage 841 and the connecting cavity 843 can be completely isolated, allowing the water in the water passage 841 to enter the drainage channel 844. During the sampling phase, the ring 931 is inserted into the drainage channel 844, allowing the water in the connecting cavity 843 to be pushed into the drainage channel 844 and discharged through the pump 93. Moreover, the ring 931 contacts the inner wall of the drainage channel 844, preventing the water in the drainage channel 844 from flowing back along the gap between the ring 931 and the inner wall of the drainage channel 844, thus making the water flow direction controllable.

[0057] In a further embodiment, to ensure the stable operation of pushing and sampling, refer to Figure 6 , Figure 7 and Figure 8 The end shell 82 is located at the inlet of water passage 1 841, water passage 2 845, and water passage 3 846. A guide groove 823 communicating with the bypass channel 842 is provided in the middle of the end shell 82. Spray nozzles 822 are arranged in a ring array at the inlet of water passage 2 845 and water passage 3 846, and the spray nozzles 822 communicate with the guide groove 823. A three-way shell 84 is inserted into the end shell 82. A filter cover 81 is provided at the end of the end shell 82 facing away from the three-way shell 84. The filter cover 81 is fixed to the three-way shell 84 by a tie rod 83. The filter cover 81... The part is equipped with a perforated plate, and the end shell 82 is installed at the water inlet so that the nozzle 822 is close to the working parts of the sampling sensor 1 85 and the sampling sensor 2 86 to facilitate the smooth progress of the cleaning work. The filter cover 81 blocks large solid impurities before the water flows in, so as to avoid damage to the internal sampling sensor working parts and pump. Moreover, the plug-in combination means that even if there is a problem of small solid impurities accumulating later, the staff can quickly disassemble the internal components by removing the nut at the end of the pull rod 83 to clean them quickly, making maintenance convenient.

[0058] In a further embodiment, to simplify the push and sampling process, refer to Figure 4The positioning mechanism 4 also includes cable 3 46 and cable 47. The rotating roller 1 42 is divided into interval 1 421, interval 2 422 and interval 3 423 along the axial direction. Cable 1 43, cable 3 46 and cable 47 are respectively wound in interval 1 421, interval 2 422 and interval 3 423. The lower ends of cable 1 43, cable 2 45, cable 3 46 and cable 47 are respectively equipped with connecting sleeves 49. The connecting sleeves 49 are coaxially sleeved on the outside of the pull rod 83. After the positioning mechanism 4 releases cable 1 43 and cable 2 45 for deep sampling, cable 3 46 and cable 47 are set to stabilize the horizontal position of the sampling mechanism 8. In this way, the sampling mechanism 8 is switched to the pushing state without retracting the sampling mechanism 8. The upper middle plate 1 is moved forward synchronously by the traction of the cable and directly moves to the next sampling position. Sampling at the same depth position can be performed without repeated cable release and retraction operations.

[0059] In a further embodiment, to ensure that the cable does not wear abnormally, refer to Figure 3 and Figure 4 The adjustment mechanism 4 also includes a reversing frame 48, which is fixed on the top surface of the middle plate 1 and has corresponding cables 43, 45, 46 and 47 respectively. The top of the reversing frame 48 is an idler wheel, and the middle of the circumferential side wall of the idler wheel has an annular groove, which can hold the cable to prevent it from falling off and can avoid sliding wear through rolling support. The middle plate 1 has through holes corresponding to cables 43, 45, 46 and 47 respectively. The inner diameter of the through holes is larger than the cable size, and anti-wear sleeves can be installed to further reduce the surface wear of the cables.

[0060] In a further embodiment, to prevent excessively long cables from tangling together when not retracted, refer to... Figure 5 Anti-tangling mechanism 7 is installed on the outer side of cables 1 (43), 2 (45), 3 (46), and 47. The anti-tangling mechanism 7 is located below the middle plate 1. The anti-tangling mechanism 7 can separate the four cables by covering them. The anti-tangling mechanism 7 includes crosses 71. The ends of the crosses 71 are provided with round holes that cooperate with cables 1 (43), 2 (45), 3 (46), and 47. Multiple crosses 71 are set together and separated by a distance from each other by permanent magnets 72. This can form a long-distance overhead support between the cables along the height direction, which further enhances the ability to prevent the cables from twisting and tangling. Moreover, permanent magnets 72 are embedded in the middle of the crosses 71. The upper and lower layers of permanent magnets 72 repel each other magnetically. When the cable is retracted, the multiple crosses 71 are pressed to the bottom of the middle plate 1. At this time, the multiple crosses 71 overcome the magnetic repulsion force and move closer to each other under the action of the cable tension, making it easy to reel in. When the cable is released again, the multiple crosses 71 will separate and unfold again. The passive support structure is convenient and stable to use.

[0061] In a further embodiment, for long-distance use, refer to Figure 1 and Figure 3 A frame 11 is fixedly installed on the bottom surface of the middle plate 1, and an energy storage device 5 is installed on the top of the frame 11. A photovoltaic panel 6 is suspended on the top of the middle plate 1, and an inverter 61 is installed at the lower end of the photovoltaic panel 6. The inverter 61 is fixedly installed on the top surface of the middle plate 1. It can be used without shore power supply and can stay on the water surface for a long time using photovoltaic power supply. A remote sensing module 3 is installed at the top edge of the middle plate 1. The remote sensing module 3 can receive and transmit sampling control signals and upload sampling results. It can be docked for maintenance only, making it more flexible to use.

[0062] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A water quality testing device for water conservancy projects, characterized in that, include: A middle plate (1), wherein a float (2) is installed at the bottom edge of the middle plate (1); The adjustment mechanism (4) includes a first rotating roller (42) and a second rotating roller (44). The first rotating roller (42) and the second rotating roller (44) mesh with each other through toothed grooves opened on the circumferential sidewalls. The first rotating roller (42) and the second rotating roller (44) are respectively wound with cable first (43) and cable second (45) in opposite directions on their outer sides. The sampling mechanism (8) includes an end shell (82) and a three-way shell (84). The three-way shell (84) is installed at the lower ends of cable one (43) and cable two (45). The three-way shell (84) is provided with independent water passage one (841), water passage two (845) and water passage three (846). The inlet of water passage two (845) and water passage three (846) is respectively provided with sampling sensor one (85) and sampling sensor two. (86) The three-way shell (84) is provided with a bypass channel (842) communicating with the first water passage (841). The end shell (82) is provided with a nozzle (822) communicating with the bypass channel (842) at the location corresponding to the first sampling sensor (85) and the second sampling sensor (86). The first water passage (841), the second water passage (845) and the third water passage (846) are connected to the drainage channel (844) through the connecting cavity (843). The pusher (9) includes a telescopic rod (91) which is centrally fixed in the drainage channel (844). A connecting rod (95) is installed at the free end of the telescopic rod (91). Pumps 1 (92) and 2 (93) are equidistantly arranged on the connecting rod (95) along the axial direction. A diversion frame (94) is provided between pumps 1 (92) and pumps 2 (93). The diversion frame (94) is fixedly installed at the entrance of the bypass channel (842).

2. The water quality testing device for water conservancy projects according to claim 1, characterized in that, The diversion frame (94) includes a fixed ring (941), an inner ring (944) and an outer ring (945). A relay shell (942) is provided at the edge of the fixed ring (941). The relay shell (942) has a port (947) facing the pump (93). The relay shell (942) is fixedly installed on the side wall at the entrance of the bypass channel (842). The fixed ring (941) is connected to the outer ring (945) through an elastic frame (943). The outer ring (945) is coaxially fixed to the inner ring (944) through a support rod (946).

3. The water quality testing device for water conservancy projects according to claim 2, characterized in that, The inner diameter of the fixed ring (941) is equal to the inner diameter of the inner ring (944), and an annular gap is formed between the outer wall of the inner ring (944) and the inner wall of the outer ring (945), and the port (947) is completely located within the coverage area of ​​the annular gap.

4. The water quality testing device for water conservancy projects according to claim 3, characterized in that, The outer circumferential walls of pump one (92) and pump two (93) are respectively provided with ring one (921) and ring two (931). Ring one (921) slides in contact with the inner wall of water passage one (841), and ring two (931) slides in contact with the inner wall of drainage passage (844). The width of ring two (931) is equal to the width of the connecting cavity (843).

5. The water quality testing device for water conservancy projects according to claim 1, characterized in that, The end shell (82) is located at the inlet of the water passage one (841), water passage two (845) and water passage three (846). The end shell (82) has a guide groove (823) in the middle that communicates with the bypass channel (842). The nozzles (822) are arranged in a ring array at the inlet of the water passage two (845) and water passage three (846). The nozzles (822) communicate with the guide groove (823). The three-way shell (84) is inserted and combined with the end shell (82). The end shell (82) has a filter cover (81) at the end facing away from the three-way shell (84). The filter cover (81) is fixed to the three-way shell (84) by a tie rod (83). The filter cover (81) has a mesh plate in the middle.

6. The water quality testing device for water conservancy projects according to claim 5, characterized in that, The adjustment mechanism (4) also includes cable three (46) and cable four (47). The rotating roller one (42) is divided into interval one (421), interval two (422) and interval three (423) along the axial direction. Cable one (43), cable three (46) and cable four (47) are respectively wound in interval one (421), interval two (422) and interval three (423). The lower ends of cable one (43), cable two (45), cable three (46) and cable four (47) are respectively equipped with connecting sleeves (49). The connecting sleeves (49) are coaxially sleeved on the outside of the pull rod (83).

7. The water quality testing device for water conservancy projects according to claim 6, characterized in that, The adjustment mechanism (4) also includes a reversing frame (48), which is fixed on the top surface of the middle plate (1) and has corresponding cables 1 (43), 2 (45), 3 (46) and 4 (47) respectively. The middle plate (1) has through holes corresponding to cables 1 (43), 2 (45), 3 (46) and 4 (47) respectively.

8. The water quality testing device for water conservancy projects according to claim 7, characterized in that, An anti-tangling mechanism (7) is fitted on the outside of the first cable (43), the second cable (45), the third cable (46), and the fourth cable (47). The anti-tangling mechanism (7) is located below the middle plate (1). The anti-tangling mechanism (7) includes a cross (71). The end of the cross (71) is provided with a round hole that cooperates with the first cable (43), the second cable (45), the third cable (46), and the fourth cable (47). A permanent magnet (72) is embedded in the middle of the cross (71). The permanent magnets (72) stacked on top of each other magnetically repel each other.

9. The water quality testing device for water conservancy projects according to claim 1, characterized in that, A frame (11) is fixedly installed on the bottom surface of the middle plate (1), an energy storage device (5) is installed on the top of the frame (11), a remote sensing module (3) is installed at the top edge of the middle plate (1), a photovoltaic panel (6) is suspended on the top of the middle plate (1), an inverter (61) is installed at the lower end of the photovoltaic panel (6), and the inverter (61) is fixedly installed on the top surface of the middle plate (1).

10. A water quality testing method in a water conservancy project, comprising a water quality testing device for a water conservancy project according to any one of claims 1-9, characterized in that, Includes the following steps: The float (2) makes the middle plate (1) float on the water surface. The adjustment mechanism (4) can change the distance of the sampling mechanism (8) into the water surface by retracting and extending cable one (43) and cable two (45). When moving, the telescopic rod (91) extends. The pump one (92) separates the connecting cavity (843) from the drainage channel (844). The pump two (93) is separated from the diversion frame (94). The pump one (92) and pump two (93) make the water flow unidirectionally in the water passage one (841) to move the entire equipment. When testing, the telescopic rod (91) shortens. (93) The contact diversion frame (94) connects the first water passage (841) to the nozzle (822) via the bypass channel (842) and the guide groove (823). The first pump (92) connects the connecting cavity (843) to the drainage channel (844). The first pump (92) makes the water flow through the second water passage (845) and the third water passage (846) to contact the sampling sensor (85) and the sampling sensor (86). The first pump (92) and the diversion frame (94) make the water in the first water passage (841) pressurize and flush the working parts of the sampling sensor (85) and the sampling sensor (86) through the nozzle (822).

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