A water quality sampling vessel for hydrological monitoring and a method of using the same

Abstract

The present invention proposes a water quality sampling ship for hydrological monitoring and a method of using the same, comprising a hull, a sampling mechanism, a supporting mechanism, and a sample storage mechanism, wherein the sampling mechanism comprises a cylinder, a lower piston is slidably connected in the cylinder, and an upper piston is attached above the lower piston; the lower piston is provided with a first water inlet hole and a first exhaust hole; the upper piston is provided with a corresponding second water inlet hole and a second exhaust hole; a main pipe is connected to the top of the frame, a rotating rod is rotatably connected inside the main pipe, and the bottom end of the rotating rod is connected to the upper piston; a guide groove is provided on the outer wall of the main pipe, a lever is connected to the outer wall of the rotating rod, one end of the lever passes through the guide groove, and the lever is slidably connected to the guide groove; the supporting mechanism comprises a supporting frame, and a sleeve for accommodating the cylinder is connected to the top of the supporting frame; the sample storage mechanism comprises a turntable, and a cover plate for pressing and holding a test tube is provided above the turntable. The device has a simple structure and is easy to operate, and can realize the accurate collection of water samples from multiple sampling points.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy projects, and in particular relates to a water quality sampling ship for hydrological monitoring and a use method thereof. Background Art

[0002] Hydrological monitoring refers to a complex and comprehensive system project that uses scientific methods to monitor, measure, analyze and warn of the temporal and spatial distribution and changing patterns of water in nature. On-site sampling is an important part of hydrological monitoring and detection. Its data source comes from the collected water samples, and the collected water samples come from various points in rivers and lakes. At present, samples are generally collected using sampling buckets. The common practice is that staff take a boat and directly connect the sampling bucket with a soft rope for sampling. However, the above method has the following disadvantages: First, when sampling, after the sampling bucket is thrown into the water, when the sampling bucket sinks from the surface water body to the deep water body, the water quality in the sampling bucket is not good. It is completely dependent on the water quality at the depth. In this case, the collected water samples will be inaccurate and may affect the water quality test results. In addition, after sampling, the water in the sampling bucket needs to be poured into a sample storage container (usually a sampling test tube) for storage. Most of the existing sampling test tubes lack lids for sealing, which may cause the collected samples to spill out during the movement of the ship. A few water storage containers have lids, but the staff is required to open the lids first, then pour the collected water samples in, and finally seal them with the lids. Using this method, when collecting samples at multiple locations, the steps are cumbersome, time-consuming and labor-intensive. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, a water quality sampling vessel for hydrological monitoring and a method for using the same are provided.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] The technical solution proposes a water quality sampling ship for hydrological monitoring, including a hull, on which a sampling mechanism and a supporting mechanism are arranged, wherein:

[0006] The sampling mechanism comprises a cylinder, one end of which is connected to a drain pipe, and a switch is provided on the drain pipe; a lower piston is slidably connected in the cylinder, and an upper piston is attached above the lower piston; the upper piston is relatively rotatably connected to the lower piston through a pin shaft; the lower piston is provided with a first water inlet hole and a first exhaust hole; the upper piston is provided with a corresponding second water inlet hole and a second exhaust hole; when the upper piston is rotated to align and communicate with the first water inlet hole and the second water inlet hole, the first exhaust hole and the second exhaust hole are also aligned and communicated; the top of the cylinder is connected to a frame; the top of the frame is connected to a main pipe, and a rotating rod is rotatably connected inside the main pipe, and the bottom end of the rotating rod freely passes through the frame and is connected to the upper piston; a guide groove is provided on the outer wall of the main pipe, and the guide groove includes a transverse groove and a vertical groove connected to the transverse groove; a lever is connected to the outer wall of the rotating rod, one end of the lever passes through the guide groove, and the lever is slidably connected to the guide groove;

[0007] The supporting mechanism comprises a supporting frame connected to the hull, the top of the supporting frame is connected with a sleeve for accommodating the cylinder body, and the end of the sleeve is provided with an open groove for the drainage pipe to pass freely.

[0008] It also includes a sample storage mechanism, which includes a turntable arranged on one side of the frame, and the turntable is rotatably connected to the hull through a first rotating shaft; a screw rod is connected to the center position of the turntable; a cover plate is arranged above the turntable, and the screw rod penetrates the cover plate and is threadedly connected with a nut; a recessed hole is opened along the circumferential direction on the surface of the turntable; the cover plate is opened with a stepped hole corresponding to the recessed hole; the large diameter end of the stepped hole is at the bottom, and the small diameter end is at the top; test tubes are inserted and placed in the stepped holes and the corresponding recessed holes; a plugging cover for sealing the stepped hole is arranged on the top of the cover plate; the plugging cover is slidably connected to the surface of the cover plate; a spring seat is connected to the top of the cover plate; a compression spring is connected between the plugging cover and the spring seat.

[0009] The surface of the cover plate is provided with a slide rail, and the blocking cover is slidably connected to the slide rail.

[0010] When the cylinder is inserted into the sleeve, the drain pipe abuts against the end of the plugging cover.

[0011] The sprocket wheel is annularly connected to the first gear and the pin is adjacent to the sprocket wheel, and the pin is adjacent to the sprocket wheel in the sprocket direction. The sprocket wheel is located adjacent to the first gear and the pin is adjacent to the sprocket wheel.

[0012] The inner wall of the cylinder is provided with a slot, and the lower piston has a boss along the circumferential direction, and the boss is adapted to be plugged into the slot.

[0013] A stretching platform is provided above the upper piston; the second exhaust hole is located in the stretching platform; and there is a height difference between the second exhaust hole and the second water inlet hole.

[0014] The frame is a filter cover body.

[0015] The present invention also proposes a method for using a water quality sampling vessel for hydrological monitoring, comprising the following steps:

[0016] S1: Place the test tube

[0017] Place the test tube in the concave hole of the turntable, then place the cover plate on the test tube, and place the top of the test tube in the stepped hole of the cover plate, and finally tighten the nut to hold the test tube in place;

[0018] S2: Determine the sampling point and collect water samples

[0019] Move the boat to the sampling point; first, turn off the switch of the drain pipe; secondly, toggle the lever, which drives the rotating rod to rotate, and then drives the upper piston to rotate, so that the first water inlet hole, the second water inlet hole, the first exhaust hole, and the second exhaust hole are respectively staggered, and the space inside the cylinder is sealed at this time; then hold the main pipe to put the cylinder into the water and place it at a suitable water depth, toggle the lever to make the rotating rod rotate, drive the upper piston to rotate, so that the first water inlet hole, the second water inlet hole, and the first exhaust hole and the second exhaust hole are connected, and water enters the internal space of the cylinder through the first water inlet hole and the second water inlet hole, and the air inside the cylinder is discharged through the first exhaust hole and the second exhaust hole, so as to realize the collection of water samples at this position; after the collection is completed, toggle the lever to reset the lever, so that the first water inlet hole, the second water inlet hole, the first exhaust hole, and the second exhaust hole are respectively staggered again, so as to realize the sealing of the water sample; finally, hold the main pipe to lift the cylinder out;

[0020] S3: Water sample storage

[0021] Place one of the test tubes at the water receiving station; hold the main pipe, turn on the switch, insert the cylinder into the sleeve, the drain pipe passes through the open slot and contacts the plugging cover, the drain pipe will drive the plugging cover to move during the movement, the compression spring is compressed, the plugging cover moves toward the center of the cover plate, and the stepped hole is no longer blocked. When the cylinder is positioned and no longer moves, the mouth of the drain pipe moves to the water receiving station and is just above the stepped hole; push the lever, the lever moves along the vertical slot, and then drives the upper piston and the lower piston to move, so that the collected water sample is pushed out through the drain pipe and flows into the test tube for storage;

[0022] S4: Reset the cover

[0023] The cylinder is pulled out of the sleeve, and as the cylinder moves, the plugging cover is reset under the action of the elastic force of the compression spring, thereby blocking the stepped hole, so that the collected water sample is sealed in the test tube;

[0024] S5: Repeat step S2 to complete the sampling work of the next sampling point;

[0025] S6: Rotate the indexing to rotate the other test tube to the water receiving station

[0026] The positioning wheel is rotated to drive the turntable to rotate; when the positioning wheel rotates, it squeezes the clamp head, causing the clamp head to compress the reset spring; the clamp head slides relatively along the surface of the positioning wheel; when the next positioning groove moves to the clamp head position, under the elastic force of the reset spring, the clamp head enters the positioning groove to complete the clamping, and the positioning of the positioning wheel is realized. At this time, the other test tube is just rotated to the water receiving station;

[0027] S7: Repeat the process of steps S3-S4 to complete the water sample storage work at the sampling point;

[0028] S8: Repeat the above steps to complete the water sample collection work at multiple sampling points.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] 1. The present invention is provided with a sampling mechanism and a supporting mechanism. The sampling mechanism adopts a double-layer structure of an upper piston and a lower piston, and the upper piston and the lower piston can rotate relatively. In this way, by utilizing this characteristic, the first water inlet hole, the second water inlet hole, the first exhaust hole, and the second exhaust hole can be staggered. When taking water, when the cylinder enters the deep water body from the surface water body, the cylinder is a closed space to prevent water from other water layers from entering the cylinder; when reaching the specified water depth position, the first water inlet hole, the second water inlet hole, and the second exhaust hole can be staggered by utilizing the characteristic of relative rotation. The first exhaust hole and the second exhaust hole are aligned and connected, and finally the water body taken is of the water quality at the depth, ensuring that the collected water sample is accurate enough; in addition, a support mechanism is also provided in the present application to support and position the sampling mechanism to reduce labor intensity; and the main pipe in the sampling mechanism also has a guide groove, which includes a transverse groove and a vertical groove connected to the transverse groove, and the transverse groove provides space for the relative rotation of the upper piston to achieve misalignment or alignment; the vertical groove provides longitudinal space for the movement of the upper piston and the lower piston to push out the water taken from the cylinder.

[0031] 2. The present invention is also provided with a sample storage mechanism, which has three functions. First, the sample storage mechanism has a turntable, which can hold multiple test tubes and can rotate, so that when sampling multiple sampling points, multiple water samples can be stored by rotating the turntable, which saves time and effort and is easy to operate; second, the sample storage mechanism has a cover plate and a plugging cover, which can be used in conjunction with the turntable to position and fix the test tube, and the cover plate can be detachably connected by a nut, which is convenient for replacing and removing the test tube; the plugging cover is slidably connected to the cover plate, and the plugging cover is used to close or open the test tube opening, and the plugging cover can be used to close or open the test tube opening. The opening of the cover is coordinated with the sampling mechanism and the supporting mechanism. When the sampling mechanism is horizontally inserted into the supporting mechanism, the mobile linkage of the drain pipe is utilized to realize the opening of the plugging cover, and the outlet of the drain pipe is automatically aligned with the stepped hole, so as to facilitate the rapid and accurate discharge of the water sample into the test tube for storage; when the cylinder is pulled out of the supporting mechanism, the plugging cover can be automatically reset, thereby realizing the sealing function to prevent spillage. The whole mechanism is reasonably designed and cleverly coordinated. There is no need to perform cumbersome opening / closing work as in the prior art. The device has the function of automatic opening and closing, and is very practical.

[0032] 3. The sample storage mechanism of the present invention also has a driving mechanism, which can drive the turntable to rotate. The driving mechanism is manual, does not require electricity, and saves costs. In addition, the positioning wheel and the clamping head in the driving mechanism also have a graduation function. When the positioning groove on the positioning wheel is engaged with the clamping head, the test tube can be rotated to the water receiving station so that positioning can be quickly achieved. When collecting multiple water samples, it is only necessary to rotate the positioning wheel to realize that multiple test tubes can be rotated to the water receiving station in turn to receive the water samples. The operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0035] Figure 2 It is a schematic diagram of the sampling mechanism structure.

[0036] Figure 3 It is a schematic diagram of the filter cover structure.

[0037] Figure 4 It is a schematic diagram of the guide groove structure.

[0038] Figure 5 It is a top view of the cylinder.

[0039] Figure 6 It is a top view of the lower piston structure.

[0040] Figure 7 It is a schematic diagram of the structure of the supporting mechanism, the sample storage mechanism and the driving mechanism.

[0041] Figure 8 It is a top view of the cover plate and the plug cover matching structure.

[0042] Fig. 9 This is a bottom view of the cover structure.

[0043] Fig.10 It is a cross-sectional view of the stepped hole structure along the AA direction.

[0044] Fig.11 It is an enlarged schematic diagram of the structure of the driving mechanism.

[0045] Fig.12 It is a schematic diagram of the matching structure of the positioning wheel and the chuck.

[0046] Description of reference numerals:

[0047] 1 sampling mechanism; 11 cylinder; 111 slot; 12 drain pipe; 13 lower piston; 131 first water inlet hole; 132 first exhaust hole; 14 upper piston; 141 second water inlet hole; 142 stretching table; 143 second exhaust hole; 15 pin; 16 frame; 17 rotating rod; 18 main pipe; 181 vertical slot; 182 horizontal slot; 19 lever; 171 handle;

[0048] 2 supporting mechanism; 21 sleeve; 211 opening slot; 22 supporting frame;

[0049] 3 sample storage mechanism; 31 turntable; 32 first rotating shaft; 33 test tube; 34 screw rod; 35 nut; 36 cover plate; 361 stepped hole; 37 slide rail; 38 plug cover; 39 compression spring; 40 spring seat; 41 driven sprocket; 42 chain; 43 second rotating shaft; 44 driving sprocket; 45 positioning wheel; 46 positioning groove; 47 fixing block; 48 clamp; 49 return spring;

[0050] 4 hulls. DETAILED DESCRIPTION

[0051] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0052] Embodiment 1

[0053] like Figure 1-12 As shown, this embodiment proposes a water quality sampling ship for hydrological monitoring, including a hull 4, on which a sampling mechanism 1 and a supporting mechanism 2 are arranged. The structure thereof is described in detail below:

[0054] The sampling mechanism 1 includes a cylinder 11, one end of which is connected to a drain pipe 12, on which a switch is provided, and the collected water sample can be discharged through the drain pipe 12; a lower piston 13 is slidably connected inside the cylinder 11, and the lower piston 13 can only slide along the inner wall of the cylinder 11 but cannot rotate. The specific structure is: a slot 111 is opened on the inner wall of the cylinder 11, and the lower piston 13 has a boss along the circumferential direction, which is adapted to be plugged into the slot 111, and the boss plays a guiding and limiting role. An upper piston 14 is attached to the top of the lower piston 13; the upper piston 14 is connected to the lower piston 13 for relative rotation through a pin shaft 15, and the upper piston 14 can rotate; the lower piston 13 is provided with a first water inlet hole 131 and a first exhaust hole 132; the upper piston 14 is provided with a corresponding second water inlet hole 141 and a second exhaust hole 143; when the upper piston 14 is rotated to align and connect the first water inlet hole 131 and the second water inlet hole 141, the first exhaust hole 132 and the second exhaust hole 143 are also aligned and connected; water flows into the interior of the cylinder 11 through the first water inlet hole 131 and the second water inlet hole 141; when the first water inlet hole 131 and the second water inlet hole 141 are misaligned, water cannot flow into the cylinder 11.

[0055] The top of the cylinder 11 is connected to a frame 16, which plays a supporting and connecting role. In this embodiment, the frame 16 is preferably a filter cover body, such as Figure 3As shown, it can also play a filtering role to prevent garbage and impurities in the water body from causing blockage; a main pipe 18 is connected to the top of the frame 16, and a rotating rod 17 is rotatably connected inside the main pipe 18, and the top of the rotating rod 17 is connected to the main pipe 18 through a bearing; the bottom end of the rotating rod 17 freely penetrates the frame 16 and is connected to the upper piston 14; a guide groove is opened on the outer wall of the main pipe 18, and the guide groove includes a transverse groove 182 and a vertical groove 181 connected to the transverse groove 182; a lever 19 is connected to the outer wall of the rotating rod 17, one end of the lever 19 penetrates the guide groove, and the lever 19 is slidably connected to the guide groove; the transverse groove 182 provides a rotation space for the rotation of the rotating rod 17, and the vertical groove 181 provides a longitudinal space for the movement of the rotating rod 17. In this embodiment, the connection point between the horizontal groove 182 and the vertical groove 181 is defined as point Q, and the other end of the horizontal groove 182 is point P. When the lever 19 is moved to point P, the first water inlet hole 131 is connected to the second water inlet hole 141; when the lever 19 is moved to point Q, the first water inlet hole 131 and the second water inlet hole 141 are misaligned and disconnected. In this way, the end point of the horizontal groove 182 can also play a positioning role, which is convenient for quickly determining the position of the second water inlet hole 141 and facilitating quick alignment and connection.

[0056] For easy carrying, a handle 171 is connected to the top of the main tube 18 .

[0057] The supporting mechanism 2 comprises a supporting frame 22 connected to the hull 4. A sleeve 21 for accommodating the cylinder 11 is connected to the top of the supporting frame 22. An opening groove 211 for the drainage pipe 12 to pass freely is formed at the end of the sleeve 21.

[0058] It should be noted that a stretching platform 142 is provided above the upper piston 14 ; the second exhaust hole 143 is located inside the stretching platform 142 ; there is a height difference between the second exhaust hole 143 and the second water inlet hole 141 , which is convenient for water intake and exhaust.

[0059] In this embodiment, a sampling mechanism 1 and a supporting mechanism 2 are provided. The sampling mechanism 1 adopts a double-layer structure of an upper piston 14 and a lower piston 13, and the upper piston 14 and the lower piston 13 can rotate relative to each other. In this way, by utilizing this characteristic, the first water inlet hole 131, the second water inlet hole 141, the first exhaust hole 132, and the second exhaust hole 143 can be misaligned. When taking water, when the cylinder 11 enters the deep water body from the surface water body, the cylinder 11 is a closed space to prevent water from other water layers from entering the cylinder 11; when reaching the specified water depth position, the first water inlet hole 131, the second water inlet hole 141 can be misaligned with each other by utilizing the characteristic of relative rotation. And the first exhaust hole 132 and the second exhaust hole 143 are aligned and connected, so that the water body taken is finally of the water quality at the depth, ensuring that the collected water sample is accurate enough; in addition, a supporting mechanism 2 is also provided in the present application, which is used to support and position the sampling mechanism 1 to reduce labor intensity; and the main pipe 18 in the sampling mechanism 1 also has a guide groove, which includes a transverse groove 182 and a vertical groove 181 connected to the transverse groove 182, and the transverse groove 182 provides space for the relative rotation of the upper piston 14 to achieve misalignment or alignment; the vertical groove 181 provides longitudinal space for the movement of the upper piston 14 and the lower piston 13, so as to push out the water taken from the cylinder 11.

[0060] This embodiment also proposes a method for using a water quality sampling vessel for hydrological monitoring, including the following steps:

[0061] Step 1: Determine the sampling point and collect water samples

[0062] Move the boat 4 to the sampling point; first, turn off the switch of the drain pipe 12; secondly, turn the lever 19, which drives the rotating rod 17 to rotate, and then drives the upper piston 14 to rotate, so that the first water inlet hole 131, the second water inlet hole 141, the first exhaust hole 132, and the second exhaust hole 143 are respectively staggered, and the space inside the cylinder 11 is sealed; then hold the main pipe 18 to put the cylinder 11 into the water and place it at a suitable water depth, turn the lever 19, so that the rotating rod 17 rotates, and drives the upper piston 14 to rotate, so that the first water inlet hole 131, the second water inlet hole 141, the first exhaust hole 132, and the second exhaust hole 143 are respectively staggered. The hole 141 and the first exhaust hole 132 and the second exhaust hole 143 are connected respectively, water enters the internal space of the cylinder 11 through the first water inlet hole 131 and the second water inlet hole 141, and the air inside the cylinder 11 is discharged through the first exhaust hole 132 and the second exhaust hole 143, so that the water sample at this position is collected; after the collection is completed, the lever 19 is moved to reset the lever 19, so that the first water inlet hole 131, the second water inlet hole 141 and the first exhaust hole 132, the second exhaust hole 143 are respectively staggered again to achieve water sample sealing; finally, the main pipe 18 is held to lift the cylinder 11;

[0063] Step 2: Water Sample Storage

[0064] Hold the main pipe 18, turn on the switch, insert the cylinder 11 into the sleeve 21, and let the drain pipe 12 pass through the open slot 211; place the test tube 33 under the pipe mouth of the drain pipe 12; push the lever 19, and the lever 19 moves along the vertical slot 181, thereby driving the upper piston 14 and the lower piston 13 to move, so that the collected water sample is pushed out through the drain pipe 12 and flows into the test tube 33 for storage, thereby realizing the water sample collection work at the sampling point;

[0065] Step 3: Repeat the above steps to complete the water sample collection work at multiple sampling points.

[0066] Embodiment 2

[0067] Continue to refer to the attached Figure 1-12 On the basis of the first embodiment, a water quality sampling ship for hydrological monitoring proposed in this embodiment also includes a sample storage mechanism 3, which includes a turntable 31 arranged on one side of the frame 16, and the turntable 31 is rotatably connected to the hull 4 through a first rotating shaft 32; a screw rod 34 is connected to the center of the turntable 31; a cover plate 36 is arranged above the turntable 31, the screw rod 34 penetrates the cover plate 36 and is threadedly connected with a nut 35, and the cover plate 36 can move up and down relative to the screw rod 34. When the cover plate 36 is pressed at the mouth of the test tube 33, the compression is achieved by tightening the nut 35; a concave hole is opened along the circumferential direction on the surface of the turntable 31 for positioning the bottom end of the test tube 33 ; The cover plate 36 is provided with a stepped hole 361 corresponding to the recessed hole; the large-diameter end of the stepped hole 361 is at the bottom and the small-diameter end is at the top, the large-diameter end is used to position the top of the test tube 33, and the small-diameter end is used to introduce water from the drain pipe 12; the test tube 33 is inserted and placed in the stepped hole 361 and the corresponding recessed hole; a plugging cover 38 for sealing the stepped hole 361 is provided on the top of the cover plate 36; the plugging cover 38 is slidably connected to the surface of the cover plate 36; a spring seat is connected to the top of the cover plate 36; a compression spring is connected between the plugging cover 38 and the spring seat; when it is necessary to inject water into the test tube 33, the plugging cover 38 is moved, the stepped hole 361 is exposed, and the mouth of the test tube 33 is opened.

[0068] For the convenience of installation, a slide rail 37 is provided on the surface of the cover plate 36 , and the blocking cover 38 is slidably connected to the slide rail 37 .

[0069] When the cylinder 11 is inserted into the sleeve 21 , the drain pipe 12 abuts against the end of the plugging cover 38 .

[0070] The sample storage mechanism 3 has three functions. First, the sample storage mechanism 3 has a turntable 31. The turntable 31 can hold multiple test tubes 33 and can rotate. In this way, when sampling multiple sampling points, multiple water samples can be stored by rotating the turntable 31, which saves time and effort and is easy to operate. Second, the sample storage mechanism 3 has a cover plate 36 and a plugging cover 38. The cover plate 36 and the turntable 31 can be used together to position and fix the test tube 33, and the cover plate 36 is detachably connected through a nut 35, which is convenient for replacing and removing the test tube 33. The plugging cover 38 is slidably connected to the cover plate 36, and the plugging cover 38 is used to close or open the mouth of the test tube 33, and the plugging cover The opening of 38 is used in conjunction with the sampling mechanism 1 and the supporting mechanism 2. When the sampling mechanism 1 is horizontally inserted into the supporting mechanism 2, the mobile linkage of the drain pipe 12 is utilized to realize the opening of the plugging cover 38. The mouth of the drain pipe 12 is automatically aligned with the stepped hole 361, so that the water sample can be quickly and accurately discharged into the test tube 33 for storage; when the cylinder 11 is pulled out of the supporting mechanism 2, the plugging cover 38 can be automatically reset, thereby realizing the sealing function to prevent spillage. The whole mechanism is reasonably designed and cleverly coordinated. There is no need to perform the cumbersome opening / closing work as in the prior art. The device has the function of automatic opening and closing, and is very practical.

[0071] In order to facilitate the rotation of the turntable 31, the first rotating shaft 32 is sleeved and connected with a driven sprocket 41, and the hull 4 is also provided with a driving mechanism that drives the driven sprocket 41 to rotate; the driving mechanism includes a second rotating shaft 43 rotatably connected to the hull 4, the second rotating shaft 43 is sleeved with a driving sprocket 44, and a chain is hung and connected between the driving sprocket 44 and the driven sprocket 41; the second rotating shaft 43 is also sleeved and connected with a positioning wheel 45, and a plurality of positioning grooves 46 are opened on the side wall of the positioning wheel 45 along the circumferential direction; a fixing block 47 is provided on one side of the positioning wheel 45, and the bottom of the fixing block 47 is connected to the hull 4; the fixing block 47 has a sliding cavity inside, and a clamping head 48 is slidably connected in the sliding cavity, one end of the clamping head 48 extends outside the sliding cavity and the end has an inclined surface; the clamping head 48 is adapted to be clamped with the positioning groove 46; a return spring 49 is provided in the sliding cavity, one end of the return spring 49 is connected to the inner wall of the sliding cavity, and the other end is connected to the clamping head 48; the positioning wheel 45 is connected with a crank.

[0072] One side of the clamping head 48 is an inclined surface and the other side is a flat surface. The advantage of this arrangement is that the positioning wheel 45 can only rotate in the same direction and cannot rotate in the opposite direction, thereby avoiding wrong rotation and causing confusion between the empty test tube 33 and the test tube 33 filled with water.

[0073] The driving mechanism can drive the turntable 31 to rotate. The driving mechanism adopts manual mode, does not require electricity, and saves costs. In addition, the positioning wheel 45 and the clamping head 48 in the driving mechanism also have a graduation function. When the positioning groove 46 on the positioning wheel 45 is engaged with the clamping head 48, the test tube 33 can be rotated to the water receiving station so that positioning can be quickly achieved. When collecting multiple water samples, it is only necessary to rotate the positioning wheel 45 to realize that multiple test tubes 33 are rotated in turn to the water receiving station to receive the water samples. The operation is simple and convenient.

[0074] This embodiment also proposes a method for using a water quality sampling vessel for hydrological monitoring, including the following steps:

[0075] When the cylinder 11 is completely inserted into the sleeve 21 and positioned, the position below the drain pipe 12 is defined as the water receiving position.

[0076] S1: Place test tube 33

[0077] Place the test tube 33 in the recessed hole of the turntable 31, then place the cover plate 36 above the test tube 33, and place the top of the test tube 33 in the stepped hole 361 of the cover plate 36, and finally tighten the nut 35 to press and fix the test tube 33;

[0078] S2: Determine the sampling point and collect water samples

[0079] Move the boat 4 to the sampling point; first, turn off the switch of the drain pipe 12; secondly, turn the lever 19, which drives the rotating rod 17 to rotate, and then drives the upper piston 14 to rotate, so that the first water inlet hole 131, the second water inlet hole 141, the first exhaust hole 132, and the second exhaust hole 143 are respectively staggered, and the space inside the cylinder 11 is sealed; then hold the main pipe 18 to put the cylinder 11 into the water and place it at a suitable water depth, turn the lever 19, so that the rotating rod 17 rotates, and drives the upper piston 14 to rotate, so that the first water inlet hole 131, the second water inlet hole 141, the first exhaust hole 132, and the second exhaust hole 143 are respectively staggered. The hole 141 and the first exhaust hole 132 and the second exhaust hole 143 are connected respectively, water enters the internal space of the cylinder 11 through the first water inlet hole 131 and the second water inlet hole 141, and the air inside the cylinder 11 is discharged through the first exhaust hole 132 and the second exhaust hole 143, so that the water sample at this position is collected; after the collection is completed, the lever 19 is moved to reset the lever 19, so that the first water inlet hole 131, the second water inlet hole 141 and the first exhaust hole 132, the second exhaust hole 143 are respectively staggered again to achieve water sample sealing; finally, the main pipe 18 is held to lift the cylinder 11;

[0080] S3: Water sample storage

[0081] Place one of the test tubes 33 at the water receiving station; hold the main pipe 18, turn on the switch, insert the cylinder 11 into the sleeve 21, and the drain pipe 12 passes through the open groove 211 and contacts the plugging cover 38. The drain pipe 12 will drive the plugging cover 38 to move during the movement, the compression spring is compressed, and the plugging cover 38 moves toward the center of the cover plate 36, and the stepped hole 361 is no longer blocked. When the cylinder 11 is positioned and no longer moves, the mouth of the drain pipe 12 moves to the water receiving station and is just above the stepped hole 361; push the lever 19, the lever 19 moves along the vertical groove 181, and then drives the upper piston 14 and the lower piston 13 to move, so that the collected water sample is pushed out through the drain pipe 12 and flows into the test tube 33 for storage;

[0082] S4: Reset the plug 38

[0083] The cylinder 11 is pulled out from the sleeve 21. As the cylinder 11 moves, the plugging cover 38 is reset under the action of the spring force, thereby plugging the stepped hole 361, so that the collected water sample is sealed in the test tube 33.

[0084] S5: Repeat step S2 to complete the sampling work of the next sampling point;

[0085] S6: Rotate and index, rotate another test tube 33 to the water receiving station

[0086] The positioning wheel 45 is rotated to drive the turntable 31 to rotate; when the positioning wheel 45 rotates, it squeezes the clamping head 48, so that the clamping head 48 compresses the reset spring 49; the clamping head 48 slides relatively along the surface of the positioning wheel 45; when the next positioning groove 46 moves to the position of the clamping head 48, under the elastic force of the reset spring 49, the clamping head 48 enters the positioning groove 46 to complete the clamping, and the positioning of the positioning wheel 45 is realized. At this time, the other test tube 33 is just rotated to the water receiving position;

[0087] S7: Repeat the process of steps S3-S4 to complete the water sample storage work at the sampling point;

[0088] S8: Repeat the above steps to complete the water sample collection work at multiple sampling points.

[0089] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A water quality sampling vessel for hydrological monitoring, comprising a hull, characterized in that: The hull is provided with a sampling mechanism and a supporting mechanism, wherein: The sampling mechanism comprises a cylinder, one end of which is connected to a drain pipe, and a switch is provided on the drain pipe; a lower piston is slidably connected in the cylinder, and an upper piston is attached above the lower piston; the upper piston is relatively rotatably connected to the lower piston through a pin shaft; the lower piston is provided with a first water inlet hole and a first exhaust hole; the upper piston is provided with a corresponding second water inlet hole and a second exhaust hole; when the upper piston is rotated to align and communicate with the first water inlet hole and the second water inlet hole, the first exhaust hole and the second exhaust hole are also aligned and communicated; the top of the cylinder is connected to a frame; the top of the frame is connected to a main pipe, and a rotating rod is rotatably connected inside the main pipe, and the bottom end of the rotating rod freely passes through the frame and is connected to the upper piston; a guide groove is provided on the outer wall of the main pipe, and the guide groove includes a transverse groove and a vertical groove connected to the transverse groove; a lever is connected to the outer wall of the rotating rod, one end of the lever passes through the guide groove, and the lever is slidably connected to the guide groove; The supporting mechanism comprises a supporting frame connected to the hull, the top of the supporting frame is connected to a sleeve for accommodating the cylinder, and the end of the sleeve is provided with an open groove for the drainage pipe to pass freely; It also includes a sample storage mechanism, which includes a turntable arranged on one side of the frame, and the turntable is rotatably connected to the hull through a first rotating shaft; a screw rod is connected to the center position of the turntable; a cover plate is arranged above the turntable, and the screw rod penetrates the cover plate and is threadedly connected with a nut; a recessed hole is opened along the circumferential direction on the surface of the turntable; the cover plate is opened with a stepped hole corresponding to the recessed hole; the large diameter end of the stepped hole is at the bottom, and the small diameter end is at the top; test tubes are inserted and placed in the stepped holes and the corresponding recessed holes; a plugging cover for sealing the stepped hole is arranged on the top of the cover plate; the plugging cover is slidably connected to the surface of the cover plate; a spring seat is connected to the top of the cover plate; a compression spring is connected between the plugging cover and the spring seat.

2. A water quality sampling vessel for hydrological monitoring according to claim 1, characterized in that: The surface of the cover plate is provided with a slide rail, and the blocking cover is slidably connected to the slide rail.

3. A water quality sampling vessel for hydrological monitoring according to claim 1, characterized in that: When the cylinder is inserted into the sleeve, the drain pipe abuts against the end of the plugging cover.

4. A water quality sampling vessel for hydrological monitoring according to claim 1, characterized in that: The sprocket wheel is annularly connected to the first gear and the pin is adjacent to the sprocket wheel, and the pin is adjacent to the sprocket wheel in the sprocket direction. The sprocket wheel is located adjacent to the first gear and the pin is adjacent to the sprocket wheel.

5. A water quality sampling vessel for hydrological monitoring according to claim 1, characterized in that: The inner wall of the cylinder is provided with a slot, and the lower piston has a boss along the circumferential direction, and the boss is adapted to be plugged into the slot.

6. A water quality sampling vessel for hydrological monitoring according to claim 1, characterized in that: A stretching platform is provided above the upper piston; the second exhaust hole is located in the stretching platform; and there is a height difference between the second exhaust hole and the second water inlet hole.

7. A water quality sampling vessel for hydrological monitoring according to claim 1, characterized in that: The frame is a filter cover body.

8. The method for using a water quality sampling vessel for hydrological monitoring as claimed in claim 4, characterized in that: The steps include: S1: Place the test tube Place the test tube in the concave hole of the turntable, then place the cover plate on the test tube, and place the top of the test tube in the stepped hole of the cover plate, and finally tighten the nut to hold the test tube in place; S2: Determine the sampling point and collect water samples Move the boat to the sampling point; first, turn off the switch of the drain pipe; secondly, toggle the lever, which drives the rotating rod to rotate, and then drives the upper piston to rotate, so that the first water inlet hole, the second water inlet hole, the first exhaust hole, and the second exhaust hole are respectively staggered, and the space inside the cylinder is sealed at this time; then hold the main pipe to put the cylinder into the water and place it at a suitable water depth, toggle the lever to make the rotating rod rotate, drive the upper piston to rotate, so that the first water inlet hole, the second water inlet hole, and the first exhaust hole and the second exhaust hole are connected, and water enters the internal space of the cylinder through the first water inlet hole and the second water inlet hole, and the air inside the cylinder is discharged through the first exhaust hole and the second exhaust hole, so as to realize the collection of water samples at this position; after the collection is completed, toggle the lever to reset the lever, so that the first water inlet hole, the second water inlet hole, the first exhaust hole, and the second exhaust hole are respectively staggered again, so as to realize the sealing of the water sample; finally, hold the main pipe to lift the cylinder out; S3: Water sample storage Place one of the test tubes at the water receiving station; hold the main pipe, turn on the switch, insert the cylinder into the sleeve, the drain pipe passes through the open slot and contacts the plugging cover, the drain pipe will drive the plugging cover to move during the movement, the compression spring is compressed, the plugging cover moves toward the center of the cover plate, and the stepped hole is no longer blocked. When the cylinder is positioned and no longer moves, the outlet of the drain pipe moves to the water receiving station and is just above the stepped hole; Push the lever, the lever moves along the vertical slot, and then drives the upper piston and the lower piston to move, so that the collected water sample is pushed out through the drain pipe and flows into the test tube for storage; S4: Reset the cover The cylinder is pulled out of the sleeve, and as the cylinder moves, the plugging cover is reset under the action of the elastic force of the compression spring, thereby blocking the stepped hole, so that the collected water sample is sealed in the test tube; S5: Repeat step S2 to complete the sampling work of the next sampling point; S6: Rotate the indexing to rotate the other test tube to the water receiving station The positioning wheel is rotated to drive the turntable to rotate; when the positioning wheel rotates, it squeezes the clamp head, causing the clamp head to compress the reset spring; the clamp head slides relatively along the surface of the positioning wheel; when the next positioning groove moves to the clamp head position, under the elastic force of the reset spring, the clamp head enters the positioning groove to complete the clamping, and the positioning of the positioning wheel is realized. At this time, the other test tube is just rotated to the water receiving station; S7: Repeat the process of steps S3-S4 to complete the water sample storage work at the sampling point; S8: Repeat the above steps to complete the water sample collection work at multiple sampling points.

Images