A water sample collection device and method

Abstract

The present invention provides a water sample collection device and a collection method, and belongs to the technical field of water sample collection. The present invention includes an upper seat plate, a lower seat plate and a collection bottle, wherein a first through hole is provided on the upper seat plate, an upper sealing plate is movably provided on the upper seat plate above the first through hole, a plurality of connecting columns are connected between the upper seat plate and the lower seat plate, a counterweight ring is provided on the outer side of the lower seat plate, a water inlet hole is provided on the bottom of the collection bottle, a lower sealing plate is movably provided in the collection bottle above the water inlet hole, and a water inlet structure is provided on the lower seat plate, and the water inlet structure can introduce external water into the water inlet hole of the collection bottle and fix the collection bottle at the same time. The present invention can quickly disassemble and fix the collection bottle, facilitate replacement, improve sampling efficiency, and at the same time avoid disturbances caused by water samples during transfer to improve the accuracy of subsequent detection.

Description

Technical Field

[0001] The invention belongs to the technical field of water sample collection, and relates to a water sample collection device and a collection method. Background Art

[0002] Water sampling is an indispensable part of environmental analysis and monitoring and river, lake and sea surveys. The selection and performance of water samplers directly affect the representativeness, effectiveness and accuracy of the collected water samples. According to the technical characteristics of water samplers, the water samplers on the market can be roughly divided into two categories based on their scope of application, water sampling precision, and operation methods: precision water samplers and simple water samplers.

[0003] Precision water samplers usually have high sampling accuracy and are suitable for research situations that require highly accurate data. However, such equipment is often large and expensive, so its scope of application is relatively limited. In contrast, simple water samplers are widely used in daily water sampling work in rivers, lakes and shallow sea areas due to their economical characteristics. Simple water samplers usually use plexiglass as the main material, which is convenient for observing the internal situation and light in weight, making them suitable for field operations.

[0004] However, the existing simple water sampler has also exposed some shortcomings during use. For example, the traditional sampling method is to collect the water sample and then guide the water sample to the water sample bottle through the catheter at the bottom of the device. This operation method is not only time-consuming and reduces work efficiency, but also due to the position design of the catheter, the disturbance of the water sample during the transfer process, and the inconsistency of water volume control during bottling, the final bottled water sample may be different from the state when it was initially collected, which in turn affects the representativeness of the sample and the accuracy of the test results. Summary of the invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a water sample collection device and collection method, which can quickly disassemble and fix the collection bottle, facilitate replacement, improve sampling efficiency, and at the same time avoid disturbances caused by the transfer of water samples to improve the accuracy of subsequent detection.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A water sample collecting device comprises an upper seat plate, a lower seat plate and a collecting bottle, the upper seat plate being provided with a first through hole, the upper side surface of the upper seat plate being provided with a door frame, the door frame being provided with a hanging ring, an upper sealing plate being movably provided on the upper seat plate above the first through hole, a plurality of connecting columns being provided on the lower side surface of the upper seat plate, the lower seat plate being fixedly connected to the connecting columns, a plurality of supporting legs being circumferentially provided on the lower side surface of the lower seat plate, a counterweight ring being provided on the outer side of the lower seat plate, the collecting bottle being cylindrical in shape with a small upper portion and a large lower portion, a water inlet hole being provided at the bottom of the collecting bottle, a water outlet being provided at the top of the collecting bottle, a lower sealing plate being movably provided in the collecting bottle above the water inlet hole, the collecting bottle being placed between the upper seat plate and the lower seat plate, and a water inlet structure being provided on the lower seat plate,

[0008] The collection bottle is directly designed into the shape of a water sample bottle, which is convenient for subsequent picking up and placement. The impact of the water flow when the collection device moves up and down in the water is used to realize the up and down movement of the upper and lower sealing plates, and to open and close the water outlet and water inlet of the collection bottle.

[0009] Preferably, a retaining ring is provided in the first through hole, and an annular rubber pad is provided on the lower side of the retaining ring. When the water outlet of the collection bottle enters the first through hole, the retaining ring can limit its height, and the annular rubber pad plays a certain sealing role.

[0010] Preferably, the water inlet structure includes an internal threaded hole and a threaded block, a first groove is provided on the side surface of the lower seat plate, the internal threaded hole is provided through the bottom of the first groove, the threaded block is threadedly connected to the internal threaded hole, a second through hole is provided through the threaded block, a blocking block is provided on the upper end surface of the threaded block, a third through hole is provided through the blocking block, and the second through hole and the third through hole are directly opposite to each other up and down. The upper and lower heights of the blocking block can be adjusted by rotating the threaded block, and the operation is simple.

[0011] Preferably, a circular plate is provided on the lower end surface of the threaded block, a filter screen is fixed in the central hole of the circular plate, and a plurality of operation panels are provided radially on the lower side of the circular plate. The sampler can easily rotate the threaded block by pinching the operation panel, and the filter screen can effectively prevent aquatic plants and aquatic organisms from entering the collection bottle.

[0012] Preferably, there are two connecting columns and they are arranged opposite to each other, and a first arc plate and a second arc plate are hinged on one of the connecting columns respectively, and the first arc plate and the second arc plate rotate towards each other to form an annular space that can wrap the collecting bottle, and the outer sides of the first arc plate and the second arc plate are detachably fixed to the other connecting column, and a first rubber pad is provided on the side of the first arc plate and the second arc plate close to the collecting bottle, and the entire side of the collecting bottle is wrapped by the first arc plate and the second arc plate, and the two first rubber pads play a tightening role to prevent the collecting bottle from slipping.

[0013] Preferably, a limit cover is provided on the upper seat plate above the first through hole, the upper sealing plate is movably arranged in the limit cover, a plurality of limit hooks are provided in the collection bottle along the circumference of the water inlet hole, and the plurality of limit hooks form a cylindrical activity space, the lower sealing plate is movably arranged in the cylindrical activity space, the limit cover plays a limit guiding role for the upper sealing plate, and the plurality of limit hooks play a limit guiding role for the lower sealing plate.

[0014] Preferably, a plurality of the upper ends of the connecting columns are horizontally fixed with a clamping plate, the clamping plate is provided with a fourth through hole, and the upper seat plate is detachably arranged on the clamping plate. The upper seat plate is detachably connected to the upper end of the connecting column, so that the collection bottle can be placed and taken out vertically from the top without worrying about the water sample being spilled.

[0015] Preferably, a fixing rod is fixedly connected between the upper sealing plate and the lower sealing plate, and the lower sealing plate can freely enter and exit the water outlet. The upper sealing plate and the lower sealing plate are connected together by the fixing rod, so that the two are linked up and down to realize synchronous opening or closing of the collection bottle, which is stable and reliable.

[0016] Preferably, a rotating shaft is horizontally rotatably arranged between two opposing supporting legs, and a plurality of rotating blades are arranged circumferentially on the rotating shaft directly below the circular ring plate. When the rotating blades on the rotating shaft are rotated by the impact of water flow, water plants and aquatic organisms can be effectively prevented from entering the collection bottle through the water inlet hole.

[0017] A water sample collection method comprising the following steps:

[0018] S1. Open the first arc plate and the second arc plate, and vertically place the collection bottle between the upper seat plate and the lower seat plate, so that the bottom of the collection bottle is located in the first groove, and the water outlet of the collection bottle is facing the first through hole of the upper seat plate;

[0019] S2. Rotate the annular plate and the threaded block upward through the operating panel. When the blocking block contacts the bottom of the collection bottle, continue to rotate upward to push the collection bottle upward so that the water outlet of the collection bottle enters the first through hole of the upper seat plate. When the water outlet contacts and squeezes the annular rubber pad of the retaining ring, the collection bottle is fixed;

[0020] S3, closing the first arc plate and the second arc plate towards each other, fixing the outer side of the collection bottle with two first rubber pads, and tying additional weights to the lower seat plate if necessary;

[0021] S4. Bring the collection device to the designated water area, install the lifting rope and the lifting hook on the lifting ring, and then lower the collection device. Under the action of the collection device's own gravity, the counterweight ring or the additional counterweight, the collection device moves vertically downward, and the lower sealing plate at the bottom of the collection bottle is impacted by the water flow and moves upward, opening the water inlet hole. Water enters the collection bottle from the water inlet hole, and then continues to flow upward to impact the upper sealing plate of the upper seat plate. The upper sealing plate moves upward, opening the first through hole, so that the water inside and outside the collection bottle are connected to each other;

[0022] S5. When the collection bottle moves to a predetermined water depth, the water sample at the current water level has been collected in the collection bottle, and then the hanging rope is pulled upward, the collection device moves upward, and is impacted by the water flow, the upper sealing plate moves downward to block the first through hole, and the lower sealing plate moves downward to block the water inlet hole, so that the water sample collected by the collection bottle can be completely brought out of the water;

[0023] S6. Open the first arc plate and the second arc plate, turn the threaded block downward, take out the collection bottle, then replace it with a new collection bottle and continue sampling, eliminating the trouble of transferring water samples.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. The collection bottle in the present invention can be disassembled for use. When sampling is required at different points, multiple collection bottles can be prepared to achieve continuous sampling, avoiding the time-consuming process of guiding the water sample from the water collector to the water sample bottle, thereby greatly improving the sampling efficiency. At the same time, during sampling, the collection bottle can be firmly fixed and is not affected by the impact of the water flow during sinking and floating, thereby avoiding the loss of the collection bottle.

[0026] 2. Since the representativeness of water samples is crucial, in the process of guiding water samples from the water collector to the water sample bottle, there may be significant differences between the final bottled water sample and the initially collected water sample due to factors such as precipitation and oxidation of substances in the water, water sample disturbance, the size and position setting of the diversion channel, etc. Therefore, this application proposes to directly use the collection bottle as the water sample bottle, eliminating the intermediate step of guiding the water sample, thereby enhancing the representativeness of the sample and the accuracy of the subsequent test results;

[0027] 3. Put the collection bottle into the first groove, then turn the threaded block upward to push the collection bottle upward so that the water outlet enters the first through hole and squeezes the annular rubber pad on the retaining ring. At this time, the upper and lower cups of the collection bottle are fixed, and then the first arc plate and the second arc plate are used to fix the side of the collection bottle so that the collection bottle will not deviate, thereby improving the stability of sampling; when the collection bottle needs to be replaced, only the threaded block needs to be turned downward to open the first arc plate and the second arc plate to take out the collection bottle, which is simple to operate;

[0028] 4. A rotating shaft and a rotating blade plate are set at the bottom of the lower base plate. When the collection device is lowered, it is impacted by the water flow, and the rotating shaft and the rotating blade plate rotate to prevent aquatic plants and aquatic organisms from entering the collection bottle through the water inlet hole, thereby ensuring smooth sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0030] Figure 2 yes Figure 1 Sectional view at AA in the middle;

[0031] Figure 3 yes Figure 1 Sectional view at the middle BB;

[0032] Figure 4 yes Figure 1 A partial enlarged view of point C in the middle;

[0033] Figure 5 yes Figure 1 A partial enlarged view of point D in the middle;

[0034] Figure 6 yes Figure 3 A partial enlarged view of point E in the middle;

[0035] Figure 7 is a structural diagram of Embodiment 2;

[0036] Figure 8 yes Figure 7 Cross-sectional view at FF;

[0037] Fig. 9 is a schematic diagram of the structure of Embodiment 3;

[0038] Fig.10 yes Fig. 9 Sectional view at GG in the middle;

[0039] Fig.11 It is a schematic diagram of the collection bottle;

[0040] Fig.12 This is a schematic diagram of another form of the collection bottle.

[0041] In the figure, 1, upper seat plate; 11, first through hole; 111, retaining ring; 12, upper sealing plate; 13, door frame; 131, lifting ring; 14, limit cover; 15, locking plate; 151, top notch groove; 2, lower seat plate; 21, first groove; 22, internal thread hole; 23, support leg; 231, L-shaped support foot; 232, buffer spring; 3, thread block; 31, second through hole; 32, blocking block; 321, third through hole; 33, circular ring plate; 331, filter screen; 332, operation panel; 4, collection bottle; 41, convex edge; 42, water inlet hole; 43, water outlet; 44. Lower sealing plate; 45. Limiting hook; 46. Fixing rod; 47. Threaded pipe head; 48. Upper screw cap; 49. Lower screw cap; 5. Connecting column; 51. First arc plate; 511. First notch groove; 52. Second arc plate; 521. Second notch groove; 53. Hinge sleeve; 54. First bolt; 55. First butterfly nut; 56. First rubber pad; 57. Second rubber pad; 6. Rotating shaft; 61. Rotating blade plate; 7. Pressing plate; 71. Second bolt; 72. Second butterfly nut; 73. Fourth through hole; 8. Foot; 81. Bottom groove; 9. Counterweight ring. DETAILED DESCRIPTION

[0042] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0043] Embodiment 1, as Figures 1 to 6 As shown, a water sample collecting device comprises an upper base plate 1, a lower base plate 2, a collecting bottle 4 and a water inlet structure.

[0044] A first through hole 11 is opened on the upper seat plate 1, a C-shaped door frame 13 is provided on the upper side of the upper seat plate 1, a lifting ring 131 is provided on the top of the door frame 13, a limit cover 14 is provided on the upper seat plate 1 above the first through hole 11, an upper sealing plate 12 is movably arranged in the limit cover 14, a retaining ring 111 is provided in the first through hole 11, and an annular rubber pad is provided on the lower side of the retaining ring 111.

[0045] The lower side of the upper seat plate 1 is provided with a plurality of connecting columns 5, the lower seat plate 2 is fixedly connected to the connecting columns 5, the lower side of the lower seat plate 2 is provided with a plurality of supporting legs 23 along the circumferential direction, preferably, the bottom of the supporting legs 23 is spherical, and a counterweight ring 9 is provided on the outer side of the lower seat plate 2.

[0046] like Fig.11As shown, the collecting bottle 4 is cylindrical and small at the top and large at the bottom. A water outlet 43 is provided on the top of the collecting bottle 4. A convex edge 41 is provided below the water outlet 43 of the collecting bottle 4. An external thread is provided on the outer side of the collecting bottle 4 above the convex edge 41. An upper screw cap 48 is threadedly connected to the upper end of the collecting bottle 4. A water inlet hole 42 is provided at the bottom of the collecting bottle 4. A plurality of limiting hooks 45 are provided along the circumference of the water inlet hole 42 in the collecting bottle 4. The limiting hooks 45 are in a 7-shape. A plurality of limiting hooks 45 form a cylindrical activity space. A lower sealing plate 44 is movably provided in the cylindrical activity space. The collecting bottle 4 is placed between the upper seat plate 1 and the lower seat plate 2. A plurality of base feet 8 are provided around the bottom of the collecting bottle 4. A threaded pipe head 47 is provided at the bottom of the collecting bottle 4 below the water inlet hole 42. A lower screw cap 49 is threadedly connected to the threaded pipe head 47. At the same time, in order to lay the collecting bottle 4 flat, a plurality of base feet 8 are provided around the bottom of the collecting bottle 4.

[0047] Preferably, the middle position of the bottom of the collection bottle 4 can be designed to be concave, such as Fig.12 As shown, a bottom groove 81 is provided at the bottom of the collecting bottle 4 , so that the lower screw cap 49 and the threaded tube head 47 do not affect the vertical placement of the collecting bottle 4 .

[0048] The water inlet structure is arranged on the lower seat plate 2 , and the water inlet structure can introduce external water into the water inlet hole 42 of the collection bottle 4 , and can fix the collection bottle 4 at the same time.

[0049] The collecting bottle 4 in the present invention can be disassembled for use. When sampling is required at different points, multiple collecting bottles 4 can be prepared to achieve continuous sampling, which greatly improves the sampling efficiency. At the same time, when sampling, the collecting bottle can be firmly fixed and is not affected by the impact of water flow during sinking and floating, thereby avoiding the loss of the collecting bottle. After sampling is completed, the collecting bottle is sealed with an upper screw cap and a lower screw cap to avoid the outflow of water samples.

[0050] In this embodiment, the water inlet structure includes an internal threaded hole 22 and a threaded block 3 .

[0051] The upper side of the lower seat plate 2 is provided with a first groove 21 , and the internal threaded hole 22 is formed through the bottom of the first groove 21 .

[0052] The threaded block 3 is threadedly connected to the internal threaded hole 22, a second through hole 31 is penetrated through the threaded block 3, a blocking block 32 is rotatably provided on the upper end surface of the threaded block 3, a third through hole 321 is penetrated through the blocking block 32, and the second through hole 31 and the third through hole 321 are vertically opposite to each other.

[0053] Put the collecting bottle 4 into the first groove 21, and then rotate the threaded block 3 upward to push the collecting bottle 4 upward, so that the water outlet 43 enters the first through hole 11 and is squeezed against the annular rubber pad on the retaining ring 111. At this time, the upper and lower ends of the collecting bottle 4 are fixed to improve the stability of sampling; when the collecting bottle 4 needs to be replaced, it is only necessary to rotate the threaded block 3 downward to take out the collecting bottle 4, which is simple to operate.

[0054] Preferably, a circular plate 33 is provided on the lower end face of the threaded block 3, a filter screen 331 is fixedly provided in the center hole of the circular plate 33, a plurality of operating panels 332 are radially provided on the lower side face of the circular plate 33, and the operating panels 332 are vertically arranged on the circular plate 33, so that the sampling personnel can conveniently pinch the operating panels 332 and rotate the threaded block 3; at the same time, a filter screen 331 is arranged on the circular plate 33, so as to effectively prevent water plants and aquatic organisms from entering the collection bottle 4, and play a better filtering role. At the same time, after the threaded block 3 is removed, the filter screen 331 can be rinsed, and the structure is simple.

[0055] In this embodiment, there are two connecting columns 5, which are arranged opposite to each other. A first arc plate 51 and a second arc plate 52 are hinged on one of the connecting columns 5 through a hinge sleeve 53 respectively. The first arc plate 51 and the second arc plate 52 rotate towards each other to form an annular space that can wrap the collection bottle 4. The outer side of the first arc plate 51 is provided with a first notch groove 511, and the outer side of the second arc plate 52 is provided with a second notch groove 521. A first bolt 54 is horizontally fixed on the other connecting column 5, and a first butterfly nut 55 is threadedly connected to the first stud 54. When the first arc plate 51 and the second arc plate 52 rotate towards each other, the first notch groove 511 and the second notch groove 521 are relatively inserted into the first bolt 54, and then the first butterfly nut 55 is rotated downward to press the first arc plate 51 and the second arc plate 52 onto the connecting column 5. Preferably, a first rubber pad 56 is provided on one side of the first arc plate 51 and the second arc plate 52 close to the collecting bottle 4. When the first arc plate 51 and the second arc plate 52 surround the collecting bottle 4, the two first rubber pads 56 can wrap the side of the collecting bottle 4 to prevent it from deflecting.

[0056] A water sample collection method using the above water sample collection device comprises the following steps:

[0057] S1. Open the first arc plate 51 and the second arc plate 52, and vertically place the collection bottle 4 between the upper seat plate 1 and the lower seat plate 2, so that the bottom of the collection bottle 4 is located in the first groove 21, and the water outlet 43 of the collection bottle 4 is facing the first through hole 11 of the upper seat plate 1;

[0058] S2. Rotate the annular plate 33 and the threaded block 3 upwards through the operating plate 332. When the blocking block 32 contacts the bottom of the collection bottle 4, continue to rotate upwards to push the collection bottle 4 upwards, so that the water outlet 43 of the collection bottle 4 enters the first through hole 11 of the upper seat plate 1. When the water outlet 43 contacts and squeezes the annular rubber pad of the retaining ring 111, the collection bottle 4 is fixed;

[0059] S3, close the first arc plate 51 and the second arc plate 52 towards each other, and use the two first rubber pads 56 to fix the outer side of the collection bottle 4. If necessary, additional weights can be tied to the lower seat plate 2;

[0060] S4. Bring the collection device to the designated water area, install the lifting rope and the lifting hook on the lifting ring 131, and then lower the collection device. Under the action of the collection device's own gravity, the counterweight ring 9 or the additional counterweight, the collection device moves vertically downward, and the lower sealing plate 44 at the bottom of the collection bottle 4 is impacted by the water flow and moves upward, opening the water inlet 42. Water enters the collection bottle 4 from the water inlet 42, and then continues to flow upward to impact the upper sealing plate 12 of the upper seat plate 1. The upper sealing plate 12 moves upward, opening the first through hole 11, so that the water inside and outside the collection bottle are connected to each other;

[0061] S5. When the collection bottle 4 moves to a predetermined water depth, the water sample of the current water level has been collected in the collection bottle 4. Then the suspension rope is pulled upward, and the collection device moves upward. Under the impact of the water flow, the upper sealing plate 12 moves downward to block the first through hole 11, and the lower sealing plate 44 moves downward to block the water inlet hole 42, so that the water sample collected by the collection bottle 4 can be completely brought out of the water.

[0062] S6. Open the first arc plate 51 and the second arc plate 52, rotate the threaded block 3 downward, take out the collection bottle 4, and then replace it with a new collection bottle 4 to continue sampling, eliminating the trouble of transferring water samples.

[0063] Through the above operation, it is convenient to carry out continuous sampling at different points, the sampling efficiency is high, and at the same time the trouble of transferring water samples is avoided, saving time and labor.

[0064] Embodiment 2, as Figure 7-Figure 8 As shown, a clamping plate 7 is horizontally fixed to the upper end of several of the connecting columns 5, and a fourth through hole 73 is opened on the clamping plate 7. The aperture of the fourth through hole 73 is larger than the maximum size of the collection bottle 4, and several locking structures are provided between the upper seat plate 1 and the clamping plate 7.

[0065] The locking structure includes a locking plate 15 and a second bolt 71. The locking plate 15 is horizontally fixed on the outer edge of the upper seat plate 1. The outer edge of the locking plate 15 is provided with a top notch groove 151, which can be detachably arranged on the pressing plate 7. The lower end of the second bolt 71 is rotatably arranged on the side of the pressing plate 7. The second bolt 71 is threadedly connected with a second butterfly nut 72. When the upper seat plate 1 is covered on the pressing plate 7 and is facing each other up and down, the second bolt 71 is rotated upward to be inserted into the top notch groove 151 of the locking plate 15, and then the second butterfly nut 72 is rotated downward to lock the upper seat plate 1 and the pressing plate 7 together.

[0066] Through the above design, the upper seat plate 1 can be opened, and the collection bottle can be directly placed vertically into the first groove 21 of the lower seat plate 2, and then the threaded block 3 can be rotated upward to push the water outlet 43 of the collection bottle into the first through hole. The operation is simple.

[0067] A fixing rod 46 is fixedly connected between the upper sealing plate 12 and the lower sealing plate 44, and at the same time, the lower sealing plate 44 can freely enter and exit the water outlet 43. During the sampling process, the upper sealing plate 12 and the lower sealing plate 44 move up synchronously to ensure that water enters the collection bottle 4 smoothly, and move down synchronously to retain the water sample in the collection bottle 4.

[0068] When sampling is completed, first use the lower screw cap 49 to close the threaded pipe head 47 to block the water inlet 42, then rotate the second butterfly nut, rotate the second bolt outward, lift the upper seat plate upward, and at the same time, the upper sealing plate 12 and the lower sealing plate 44 move upward, after the lower sealing plate moves out of the water outlet 43 of the collection bottle, finally cover the upper screw cap 48 to complete the sampling, so as to avoid water sample loss when taking out the collection bottle.

[0069] At the same time, the present solution omits the limiting hook 45 provided in the collecting bottle 4 , thereby simplifying the manufacturing process of the collecting bottle 4 and reducing the manufacturing cost of the collecting bottle 4 .

[0070] Embodiment three, as Figure 9-10 As shown, a rotating shaft 6 is horizontally rotatably arranged between two opposing supporting legs 23 , and the rotating shaft 6 located directly below the annular plate 33 is provided with a plurality of rotating blade plates 61 along the circumferential direction.

[0071] When the collection device is lowered, it is impacted by the water flow, causing the rotating shaft 6 and the rotating blade plate 61 to rotate, preventing aquatic plants and aquatic organisms from entering the collection bottle 4 through the water inlet hole 42, thereby ensuring that the sampling work proceeds smoothly.

[0072] Preferably, the support leg 23 is a tubular structure, and an L-shaped support foot 231 is slidably arranged inside the structure. A buffer spring 232 is connected between the upper end of the L-shaped support foot 231 and the lower seat plate 2. When the collection device falls to the bottom of the water, the compression of the buffer spring 232 reduces the impact on the collection device, while preventing excessive impact from bringing up a large amount of mud and sand on the bottom of the water and entering the collection bottle 4. It can also enhance the adaptability of the collection device to different bottom terrains and prevent it from tipping over. In addition, the contact area between the L-shaped support foot 231 and the bottom of the water is increased, thereby improving the stability of the landing.

[0073] In addition, six connecting columns are provided in the present solution, and the collecting bottle 4 is surrounded by the six connecting columns 5. Then, a second rubber pad 57 is provided on the side of the connecting column 5 close to the collecting bottle 4, and the collecting bottle 4 is protected by the second rubber pad 57 to prevent the collecting bottle 4 from deviating and hitting the connecting column 5. In addition, increasing the number of connecting columns 5 can improve the overall structural strength of the collecting device, avoid the device from being damaged during the up and down movement, and protect the collecting bottle 4 from damage.

Claims

1. A water sample collection device, characterized in that: include: An upper seat plate (1), wherein a first through hole (11) is formed on the upper seat plate (1), a door frame (13) is provided on the upper side surface of the upper seat plate (1), a lifting ring (131) is provided on the door frame (13), and an upper sealing plate (12) is movably provided on the upper seat plate (1) above the first through hole (11); A lower seat plate (2), wherein a plurality of connecting columns (5) are provided on the lower side surface of the upper seat plate (1), the lower seat plate (2) is fixedly connected to the connecting columns (5), a plurality of supporting legs (23) are circumferentially provided on the lower side surface of the lower seat plate (2), a counterweight ring (9) is provided on the outer side of the lower seat plate (2), a clamping plate (7) is horizontally fixed to the upper ends of the plurality of connecting columns (5), a fourth through hole (73) is provided on the clamping plate (7), and the upper seat plate (1) is detachably arranged on the clamping plate (7); A collecting bottle (4), the collecting bottle (4) is cylindrical and is smaller at the top and larger at the bottom. A water inlet hole (42) is provided at the bottom of the collecting bottle (4), a water outlet (43) is provided at the top of the collecting bottle (4), a lower sealing plate (44) is movably provided in the collecting bottle (4) above the water inlet hole (42), the collecting bottle (4) is placed between an upper seat plate (1) and a lower seat plate (2), a fixing rod (46) is fixedly connected between the upper sealing plate (12) and the lower sealing plate (44), and the lower sealing plate (44) can freely enter and exit the water outlet (43); A water inlet structure, the water inlet structure being arranged on the lower seat plate (2), the water inlet structure being capable of introducing external water into the water inlet hole (42) of the collection bottle (4) and simultaneously being capable of fixing the collection bottle (4); The water inlet structure comprises: An internal threaded hole (22), wherein a first groove (21) is formed on the upper side of the lower seat plate (2), and the internal threaded hole (22) penetrates and is formed at the bottom of the first groove (21); A threaded block (3), the threaded block (3) being threadedly connected to the internal threaded hole (22), the threaded block (3) being provided with a second through hole (31), a blocking block (32) being rotatably provided on the upper end surface of the threaded block (3), the blocking block (32) being provided with a third through hole (321), the second through hole (31) and the third through hole (321) being vertically opposite to each other; A circular plate (33) is provided on the lower end surface of the threaded block (3), and a filter screen (331) is fixedly provided in the center hole of the circular plate (33); A rotating shaft (6) is arranged between two opposing supporting legs (23) for horizontal rotation. The rotating shaft (6) located directly below the circular ring plate (33) is provided with a plurality of rotating blade plates (61) along the circumferential direction.

2. A water sample collection device according to claim 1, characterized in that: A retaining ring (111) is provided in the first through hole (11), and an annular rubber pad is provided on the lower side of the retaining ring (111).

3. A water sample collection device according to claim 2, characterized in that: A plurality of operating plates (332) are radially arranged on the lower side of the annular plate (33).

4. A water sample collection device according to claim 3, characterized in that: There are two connecting columns (5) arranged opposite to each other, and a first arc plate (51) and a second arc plate (52) are hinged on one of the connecting columns (5), and the first arc plate (51) and the second arc plate (52) rotate towards each other to form an annular space capable of wrapping the collection bottle (4). The outer sides of the first arc plate (51) and the second arc plate (52) are detachably fixed to the other connecting column (5), and a first rubber pad (56) is provided on the side of the first arc plate (51) and the second arc plate (52) close to the collection bottle (4).

5. A water sample collection device according to claim 4, characterized in that: A limit cover (14) is provided on the upper seat plate (1) above the first through hole (11), and the upper sealing plate (12) is movably arranged up and down in the limit cover (14).

6. A method for collecting water samples using the water sample collecting device according to claim 5, characterized in that: The following steps are involved: S1. Open the first arc plate (51) and the second arc plate (52), and vertically place the collection bottle (4) between the upper seat plate (1) and the lower seat plate (2), so that the bottom of the collection bottle (4) is located in the first groove (21), and the water outlet (43) of the collection bottle (4) is directly opposite to the first through hole (11) of the upper seat plate (1); S2, the annular plate (33) and the threaded block (3) are rotated upward through the operating plate (332), and when the blocking block (32) contacts the bottom of the collection bottle (4), the annular plate (33) and the threaded block (3) are continuously rotated upward to push the collection bottle (4) upward, so that the water outlet (43) of the collection bottle (4) enters the first through hole (11) of the upper seat plate (1), and when the water outlet (43) contacts and squeezes the annular rubber pad of the retaining ring (111), the collection bottle (4) is fixed; S3, closing the first arc plate (51) and the second arc plate (52) towards each other, and fixing the outer side of the collection bottle (4) using two first rubber pads (56); S4, the collection device is brought to the designated water area, the lifting rope and the lifting hook are installed on the lifting ring (131), and then the collection device is lowered. Under the action of the collection device's own gravity, the counterweight ring (9) or the additional counterweight, the collection device moves vertically downward, and the lower sealing plate (44) at the bottom of the collection bottle (4) is impacted by the water flow and moves upward, opening the water inlet hole (42). Water enters the collection bottle (4) through the water inlet hole (42), and then continues to flow upward to impact the upper sealing plate (12) of the upper seat plate (1). The upper sealing plate (12) moves upward, opening the first through hole (11), so that the water inside and outside the collection bottle are connected to each other; S5. When the collection bottle (4) moves to a predetermined water depth, the water sample at the current water level has been collected in the collection bottle (4), and then the suspension rope is pulled upward, the collection device moves upward, and is impacted by the water flow, the upper sealing plate (12) moves downward to block the first through hole (11), and the lower sealing plate (44) moves downward to block the water inlet hole (42), so that the water sample collected by the collection bottle (4) can be completely brought out of the water; S6. Open the first arc plate (51) and the second arc plate (52), turn the threaded block (3) downward, take out the collection bottle (4), and then replace it with a new collection bottle (4) to continue sampling.

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