A type of card-type stratified water sampler

Abstract

A cap-type stratified water sampler includes a sampler bottle, a release structure, a hammer that descends along a downward rope, and a plug. A counterweight is provided on the sampler bottle, and a counterweight structure is provided on the counterweight. The counterweight structure includes counterweight components and a locking and fixing structure. The locking and fixing structure locks and fixes the counterweight components, ensuring they are securely fixed to the counterweight and will not fall off during the descent of the sampler bottle. The counterweight components are a series of components with various weight specifications used in pairs. This invention provides a cap-type stratified water sampler that can maintain a vertical posture relative to the water surface, allowing the sampler to smoothly enter deep water areas for water collection. It also avoids the phenomenon of the hammer being unable to descend smoothly, provides greater selectivity in rope selection, and makes it easier to retrieve the collected water samples, greatly facilitating the use of the cap-type stratified water sampler.

Description

Technical Field

[0001] This invention relates to the field of water sampler technology, and more specifically, to a cap-type stratified water sampler. Background Technology

[0002] The cap-type water sampler is suitable for sampling at any depth in reservoirs, rivers, lakes, and oceans. The sampler (with both end caps open) is lowered into the water by lowering a rope. Once submerged, water will flow through the sampler. After sinking to the designated depth, a hammer is lowered to close the end caps, sealing the water sample. The sampler is then retrieved from the water, completing the sampling process.

[0003] Currently, when using cap-type water samplers in China, due to design flaws, it is often impossible to complete sampling of water layers at different depths without the aid of external mechanical force.

[0004] Traditional snap-on type layered water samplers use rubber bands that connect the upper and lower plugs, which are secured by hooks inside the plugs and rely solely on the tension between the rubber bands. Improper force during water sampling can easily cause them to fall off. The relatively short rubber bands and the relatively long and thin water sampler storage pipe make reinstallation difficult and require the use of ropes or other items, greatly increasing the difficulty of the sampling process and causing delays in the sampling progress.

[0005] Traditional cap-type stratified water samplers, when operating in deep water, suffer from limited weight due to the lack of counterweights to increase their weight. As the sampler descends, it is constrained by deep water flow and its own insufficient weight, making it impossible to maintain a vertical position relative to the water surface. Furthermore, lowering the rope at an excessively large angle will directly prevent the sampler from reaching the expected depth, thus failing to meet the stratified water sampling needs of deeper water areas.

[0006] Therefore, the existing technology has problems and needs further improvement and development. Summary of the Invention

[0007] (I) Purpose of the invention: In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a card-type stratified water sampler that can facilitate water sampling and save manpower.

[0008] (II) Technical Solution: To solve the above-mentioned technical problems, this technical solution provides a cap-type layered water sampler, including a water sampler bottle body with an internal rubber band and open at both ends, a release structure located on the outer wall of the water sampler, a downward-slipping rope connected to the end of the release structure away from the water sampler bottle body, which slides down along the downward-slipping rope and strikes the hammer of the release structure, a plug connected to the rope and sealing both ends of the water sampler bottle body after release, a counterweight part provided on the water sampler bottle body, and a counterweight structure provided on the counterweight part. The counterweight structure includes a counterweight component and a locking and fixing structure. The locking and fixing structure locks and fixes the counterweight component, so that the counterweight component is firmly fixed on the counterweight part and will not fall off during the descent of the water sampler bottle body; the counterweight component is a pair of components with various specifications and weights.

[0009] Furthermore, the counterweight consists of a series of arc-shaped pieces with various weight specifications used in pairs. These arc-shaped pieces have the same length and curvature but different thicknesses. Each pair of identical arc-shaped pieces is interlocked to form an inner diameter that matches the curvature of the outer diameter of the counterweight. The length of the counterweight is greater than or equal to the length of a single arc-shaped piece, and less than or equal to 1 / 3 of the length of the water sampler bottle. The length of the counterweight ranges from 120mm to 160mm. The depth of the counterweight is less than or equal to the thickness of the smallest arc-shaped piece, and the depth ranges from 3mm to 6mm. The locking and fixing structure is separately installed from the counterweight and used in conjunction with it; or the locking and fixing structure is integrally installed with the counterweight and used in conjunction with it.

[0010] Furthermore, an Ω-shaped fixing piece is provided on the arc-shaped piece. When the counterweights are used in pairs and fastened together, the Ω-shaped fixing pieces are located on the same vertical line. The locking and fixing structure is a D-type trailer pin or an R-type spring pin. The locking and fixing structure is located on the counterweight. The locking and fixing structure includes a latch and a bolt. The bolt is a horizontal bar that is fixed at one end and free at the other end. The latch fixes the bolt.

[0011] Furthermore, the hammer includes a rotating end at the top, a base end supporting the rotating end, and an engaging post integrally connected to the rotating end and disposed inside the base end. The engaging post is a column with a U-shaped opening in the axial direction. The width of the U-shaped opening is used to allow the downward-smashing rope to be engaged, thereby increasing the inner diameter of the hammer engaging the downward-smashing rope. The width of the U-shaped opening is set to a range of 14mm to 20mm.

[0012] Furthermore, the plug includes a top plug and a bottom plug, with a water outlet pipe provided in the bottom plug. Both the bottom plug and the top plug include a support, a cap, and a hook. An anti-disengagement structure is provided on the hook to close the gap formed by the hook.

[0013] The anti-disengagement structure includes a pin, a retaining spring, and a buckle. The pin connects the hook to the buckle, the retaining spring is located on the pin, and the buckle closes the notch of the hook.

[0014] Furthermore, the length of the support column of the bottom plug is increased so that when the bottom end of the bottom support column is placed on the ground, there is a sufficient first height difference between the water outlet of the water pipe and the water inlet of the container. The first height difference ranges from 50mm to 100mm, and the length of the bottom support column ranges from 250mm to 350mm.

[0015] Furthermore, a support structure matching the bottom plug is provided below the water sampler bottle. The support structure ensures that when the water sampler bottle is upright, there is a sufficient second height difference between the water outlet of the water outlet pipe and the water inlet of the receiving container. The second height difference ranges from 100mm to 200mm.

[0016] Furthermore, the support structure includes support legs and docking blocks. The support legs are located around the docking blocks and are evenly distributed. The docking blocks are located at one end close to the bottom plug, and the support legs are located at the other end away from the bottom plug.

[0017] Furthermore, the support frame is a tripod with an extendable length, which adjusts the height of the water outlet from the ground after the water sampler bottle is upright. The docking block has a groove in the center position so that the support column of the bottom plug can be inserted.

[0018] Furthermore, the diameter of the groove matches the diameter of the bottom plug support, the depth of the groove is less than the length of the support, and the depth of the groove ranges from 30mm to 50mm, leaving space for the outlet pipe to connect to the flexible hose.

[0019] (III) Beneficial effects: The present invention provides a cap-type stratified water sampler, which enables the water sampler to maintain a vertical posture relative to the water surface and to smoothly enter the designated deep water area for water sampling. It also avoids the phenomenon that the hammer cannot slide down smoothly, provides greater selectivity when choosing rope, and makes it easier to take out the collected water sample, which greatly facilitates the use of the cap-type stratified water sampler. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a cap-type stratified water sampler with a counterweight section according to the present invention;

[0021] Figure 2 This is a structural diagram of the R-type spring pin and the D-type trailer pin;

[0022] Figure 3This is another structural schematic diagram of a cap-type stratified water sampler with a counterweight section according to the present invention;

[0023] Figure 4 This is a schematic diagram of the hammer's structure;

[0024] Figure 5 This is a schematic diagram of the hammer's structure viewed from below;

[0025] Figure 6 This is a schematic diagram of the bottom plug structure;

[0026] Figure 7 This is a top view of the support frame structure.

[0027] Figure 8 This is a schematic diagram of the water sampler in the sixth embodiment;

[0028] Figure 9 This is a schematic diagram of the structure of part A in the sixth embodiment;

[0029] Figure 10 This is a right-side structural schematic diagram of the water sampler bottle with plugs at both ends in the sixth embodiment;

[0030] Figure 11 This is a schematic diagram of the left-side structure of the water sampler bottle with plugs at both ends, cut along the center line after the bottle is split open.

[0031] Reference numerals: 1. Water sampler body; 11. Counterweight; 12. Water inlet; 13. Check valve; 14. Pressure valve; 15. Mounting hole; 16. Shallow groove; 2. Release structure; 3. Hammer; 31. Rotating end; 32. Base end; 33. Engaging post; 4. Plug; 41. Top plug; 42. Bottom plug; 42. Support column; 421. Cap; 422. Hook; 423. Outlet pipe; 424. Anti-disengagement structure; 4231. Rubber band; 5. Counterweight; 61. Ω-shaped fixing plate; 611. Lock; 621. Bolt; 622. Support. 71. Leg, 72. Connecting block, 721. Groove, 8. Pressure box, 81. Center insert rod, 811. Rotary cap, 812. Column rod, 813. Triangular rod, 814. Pressure spring, 821. First telescopic spring, 822. Second telescopic spring, 83. Movable plate, 831. First movable plate, 832. Third movable plate, 833. Pressure rod, 84. Lower pressure rod, 841. Upper pressure rod, 842. Control core, 85. Opening structure, 9. Gear rack, 91. Rotating block, 92. Gear, 93. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to preferred embodiments. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0033] The accompanying drawings are schematic diagrams of embodiments of the present invention. It should be noted that these drawings are for illustrative purposes only and are not drawn to scale, and should not be construed as limiting the actual scope of protection of the present invention.

[0034] A cap-type stratified water sampler includes a sampler bottle 1, a release structure 2, a hammer 3, and a plug 4. The sampler bottle 1 is open at both ends, and a pressure valve 14 is provided at the end near the release structure 2. The release structure 2 is located on the outer wall of the sampler bottle 1 and is used to release the plug 4. A downward-striking rope is connected to the end of the release structure 2 away from the sampler bottle 1. The hammer 3 is separate from the sampler bottle 1 and slides down along the downward-striking rope, striking the release structure 2 and causing it to release the plug 4, thus allowing the plug 4 to successfully seal both ends of the sampler bottle 1. Before water is introduced, the plug 4, in the open state, is hung on the H-shaped locking pin of the release structure 2 via the rope. After being released, it seals both ends of the sampler bottle 1, allowing water samples to be successfully collected.

[0035] The pressure valve 14 is used to balance the pressure inside and outside the water sampler bottle, thereby allowing the water inside the water sampler bottle 1 to flow out smoothly. The plug 4 includes a top plug 41 and a bottom plug 42. The rope includes a first rope and a second rope. The top plug 41 is located at the end near the downward-slamming rope, and the bottom plug 42 is located at the end away from the downward-slamming rope. The top plug 41 is hung on the H-shaped locking pin of the release structure 2 via the first rope, and the bottom plug 42 is fastened to the first rope via the second rope. A rubber band 5 is also provided inside the water sampler bottle 1. The rubber band 5 is located at the end near the inner wall of the water sampler bottle 1, with one end hanging on the top plug 41 and the other end hanging on the bottom plug 42. The tension of the first rope, the second rope, and the rubber band 5 securely sets the plug 4 on the outside of the water sampler bottle 1, thereby opening both ends of the water sampler bottle 1.

[0036] More specifically, hooks are provided on both the top plug 41 and the bottom plug 42 for hooking the rubber band 5. When stationary, the rubber band 5 connects and tightens the top plug 41 and the bottom plug 42 through the hooks on the top plug 41 and the bottom plug 42, thereby sealing the water sampler bottle 1.

[0037] A water outlet pipe 424 is also provided on the bottom plug 42. The water outlet pipe 424 can maximize the outflow of water samples from inside the water sampler bottle 1 and transfer them from the water outlet pipe 424 to the receiving container. Since the water outlet pipe 424 is relatively short, an external flexible short pipe can be used as an extension of the water outlet of the water outlet pipe 424 to facilitate the smooth transfer of water from inside the water sampler bottle 1. The pressure valve 14 controls the outflow of water samples from inside the water sampler. That is, before water is introduced, the pressure valve 14 is tightened to store the collected water inside the water sampler bottle 1; after water is removed, simply loosen the pressure valve 14 and place the receiving container at the position of the water outlet pipe 424 to transfer the water samples from inside the water sampler bottle 1.

[0038] The release structure 2 includes a force-receiving end and a transmission end. The force-receiving end is also the top of the release structure 2, located at the end away from the water sampler bottle body 1, and is used to withstand the impact of the hammer 3. The transmission end is located outside the water sampler bottle body 1, fixed to the outer wall of the water sampler bottle body 1, and parallel to the outer wall of the water sampler bottle body 1. Before entering the water, press the force-receiving end of the release structure 2 to open the H-shaped locking pin, hook the first rope onto the H-shaped locking pin, and fasten the second rope onto the first rope. Then, use the rubber band 5 inside the water sampler bottle body 1 to connect the two end plugs 4, thereby achieving the purpose of opening and fixing the end plugs 4 at both ends of the water sampler bottle body 1. After being submerged, the hammer 3 falls along the drop rope and strikes the force-bearing end of the release structure 2, opening the H-shaped locking pin in the middle of the outer wall of the water sampler bottle 1. This releases the first rope along with the second rope, and the plugs 4 at both ends are released and closed under the tension of the rubber band 5.

[0039] After descending to the designated water depth, the hammer 3 is released along the descending rope. The hammer 3 impacts the receiving end, and the impact force is transmitted to the transmitting end, releasing the H-shaped locking pin located on the transmitting end. This loosens the first rope connected to the top plug 41 and the second rope connected to the bottom plug 42. Under the action of the rubber band 5, the top plug 41 seals the top of the water sampler bottle, and the bottom plug 42 seals the bottom of the water sampler bottle, allowing for successful water sample collection.

[0040] In a first preferred embodiment of the cap-type stratified water sampler, a counterweight 11 is provided on the sampler bottle body 1, and a counterweight structure 6 is provided on the counterweight 11. The counterweight 11 is located at the end of the sampler bottle body 1 near the bottom plug 42, and is used to place the counterweight structure 6 to increase the weight of the sampler bottle body. This ensures that the sampler bottle body 1 remains perpendicular to the water surface during descent, avoiding a large tilt angle, allowing the sampler bottle body 1 to descend smoothly to the designated depth and collect the required water sample.

[0041] Specifically, the counterweight 11 is the portion of the water sampler bottle 1 that tapers toward the central axis of the water sampler bottle, meaning that the outer diameter of the water sampler bottle on the counterweight 11 is smaller than the outer diameter of other parts of the water sampler bottle.

[0042] The counterweight structure 6 includes a counterweight 61 and a locking and fixing structure. The locking and fixing structure locks and fixes the counterweight 61, ensuring that it is securely fixed to the counterweight part 11 and will not fall off during the descent of the water sampler bottle 1. The counterweight 61 consists of a series of components with various weight specifications used in pairs. The length of the counterweight part 11 is greater than or equal to N times the length of a single arc-shaped piece, and less than or equal to 1 / 3 of the length of the water sampler bottle 1. The length of the counterweight part ranges from 120mm to 160mm, where N is a positive integer. The depth of the counterweight part is less than or equal to the thickness of the smallest mass arc-shaped piece, and the depth ranges from 3mm to 6mm.

[0043] Specifically, such as Figure 1 As shown, the counterweight 61 is a series of components of different specifications and weights that are used in pairs. In this embodiment, it is an arc-shaped piece, that is, the counterweight 61 is a two-piece structure, which uses two arc-shaped pieces of the same specification to be fastened together and fixed to the counterweight part 11 of the water sampler bottle 1 to increase the weight of the water sampler bottle 1.

[0044] The arc-shaped piece is preferably made of metal, and its specifications can be set to progressively increasing weights such as 10KG, 20KG, 30KG, and 40KG. The counterweight 61 may include a first arc-shaped piece, a second arc-shaped piece, a third arc-shaped piece, a fourth arc-shaped piece, etc., and the length and curvature of the N arc-shaped pieces of different weights are the same, but their thicknesses differ. For example, the first arc-shaped piece is 10KG, the second arc-shaped piece is 20KG, the third arc-shaped piece is 30KG, the fourth arc-shaped piece is 40KG, and so on. In use, a suitable size is selected to match the counterweight 11 of the water sampler bottle 1 to increase the weight of the water sampler bottle 1.

[0045] It should be noted that, in use, the counterweight 61 consists of two identical arc-shaped pieces forming a set, which are then fastened together to form an inner diameter that matches the outer diameter curvature of the counterweight part 11 of the water sampler bottle. When a set of arc-shaped pieces is fastened together, there are two locking positions. After these two locking positions are tightened, the set of arc-shaped pieces can be fixed to the counterweight part 11.

[0046] Furthermore, in this invention, the locking and fixing structure can be set separately from the counterweight 61 or integrated with it; no limitation is imposed in this invention. The following is a detailed description of the case where a set of arc-shaped pieces used for fastening are locked and fixed at one of the locking and fixing positions.

[0047] The first form of this embodiment, such as Figure 1 As shown, the locking and fixing structure is separately arranged and used in conjunction with the counterweight 61. Specifically, an Ω-shaped fixing piece 611 is provided on the arc-shaped piece. The Ω-shaped fixing piece 611 is a metal piece with a certain thickness and is located near the straight gap formed by the interlocking of a pair of arc-shaped pieces. The number of Ω-shaped fixing pieces 611 is not limited and can be set according to the length of the arc-shaped piece. However, it should be noted that the Ω-shaped fixing pieces are located on the same vertical line when the counterweights are used in pairs, so that the locking and fixing structure can smoothly lock and fix the counterweights. The Ω-shaped fixing piece 611 can be fixed to the counterweight 61 by welding or bolting, etc. The specific fixing method is not required in this invention.

[0048] In this embodiment, the locking and fixing structure can be a D-type trailer pin or an R-type spring pin, such as... Figure 2 As shown. When the D-type trailer pin is used in conjunction with the counterweight 61, the cylindrical portion of the D-type trailer pin is inserted into the Ω-shaped fixing piece 611, connecting the interlocking arc-shaped pieces together. The D-shaped portion of the D-type trailer pin is fitted onto the smaller diameter end of the cylindrical portion of the D-type trailer pin, locking a set of arc-shaped pieces onto the counterweight 11. When the R-type spring pin is used in conjunction with the counterweight 61, the cylindrical portion of the R-type spring pin is inserted into the Ω-shaped fixing piece 611, and the R-shaped portion of the R-type spring pin is inserted into the smaller diameter end of the cylindrical portion of the R-type spring pin, locking a set of arc-shaped pieces onto the counterweight 11.

[0049] The second form of this embodiment, such as Figure 3 As shown, the locking and fixing structure is integrally set with the counterweight 61 and used in conjunction with it.

[0050] The locking and fixing structure is located on the counterweight 61 and is located near the straight gap formed by the interlocking of a set of arc-shaped pieces.

[0051] Specifically, the locking and fixing structure includes a latch 621 and a bolt 622. The bolt 622 is a horizontal bar with one end fixed and the other end free. The latch 621 fixes the bolt 622, such as... Figure 3 As shown. The latch 621 and the bolt 622 may be aligned on a straight line or not on a straight line at a locking and fixing position of a set of arc-shaped pieces used for fastening, depending on the structural cooperation method of the latch 621 and the bolt 622, and are not limited in this invention.

[0052] The latch 621 can be set on one of the paired arc-shaped pieces, located on the two straight edges of that arc-shaped piece. In this case, the bolt 622 is set on the other arc-shaped piece, located on the two straight edges of that arc-shaped piece, and works in conjunction with the latch 621. That is to say, latches 621 can be set on all arc-shaped pieces in a pair; or bolts 622 can be set on all arc-shaped pieces; or both latches 621 and bolts 622 can be set on that arc-shaped piece. The specific setting method is not required, as long as the bolts 622 and latches 621 on the pair of arc-shaped pieces can work together to fix the pair of arc-shaped pieces to the counterweight 11.

[0053] The usage process of the cap-type stratified water sampler of this invention is as follows: First, according to the depth to be sampled, select a suitable counterweight 61 and lock the appropriate counterweight 61 onto the counterweight part 11. Then, press the force-bearing end of the release structure 2 to hook the first rope with the H-shaped locking pin, and fasten the second rope onto the first rope. The rubber band 5 is then hooked into the hooks of the top and bottom plugs of the water sampler bottle 1. The tension of the first rope, the second rope, and the rubber band 5 secures the plug to the outside of the water sampler bottle 1, thereby opening both ends of the water sampler bottle 1. The water sampler, with the top and bottom plugs 41 and 42 secured and connected to the drop rope, is lowered into the water vertically. The drop rope, marked with depth, is released at a constant speed. When the sampler descends to the designated depth, the rotating end 31 of the hammer 3 is rotated to fit the hammer onto the drop rope. The rotating end 31 is then released to enclose the hammer onto the drop rope. The hammer 3 is then released to slide down the drop rope and collide with the force-bearing end, thereby loosening the first and second ropes. Under the restoring force of the rubber band 5, the plug 4 is released, and the sampler bottle 1 is sealed.

[0054] In a second preferred embodiment of the cap-type stratified water sampler, during the process of water collection by the water sampler bottle 1 and the use of the hammer 3 in conjunction with the release structure 2, the hammer 3 transmits force to the transmission end of the release structure 2, causing the H-shaped locking pin located in the middle of the transmission end to be opened by force.

[0055] However, when the hammer 3 moves downward along the downward-smashing rope to strike the force-bearing end, the small inner diameter of the hammer and its fixed, non-adjustable nature often result in stringent requirements for the specifications and dimensions of the downward-smashing rope. In some cases, the downward-smashing rope may meet the diameter requirements before entering the water, but after absorbing a little water, the diameter increases, causing the hammer 3 to get stuck on the downward-smashing rope and preventing it from striking smoothly. Consequently, the plug 4 cannot be sealed, and water cannot be extracted.

[0056] Therefore, in this embodiment, as Figure 4 , Figure 5 As shown, by increasing the inner diameter of the hammer 3 engaging the downward-smashing rope, the hammer 3 can smoothly fall along the downward-smashing rope to the top of the release structure 2, strike the force-bearing end, and thus release the plugs at both ends of the water sampler bottle. This also meets the needs of downward-smashing ropes of more specifications and sizes.

[0057] The hammer 3 includes a rotating end 31 located at the top, a base end 32 supporting the rotating end, and an engagement post 33 that is integrally connected to the rotating end and disposed inside the base end.

[0058] Vertical openings are provided on the rotating end 31, the base end 32, and the engaging post 33 to allow the downward-slamming rope to be vertically engaged.

[0059] The engagement post 33 is a post with a U-shaped opening in the axial direction. The width of the U-shaped opening is used to allow the drop rope to engage. To allow the hammer 3 to descend smoothly along the drop rope, the diameter of the engagement post that engages with the drop rope is increased, making the inner diameter width range from 14mm to 20mm. That is, the width range of the U-shaped opening is set to 14mm to 20mm.

[0060] In use, the U-shaped opening is rotated to the same straight position by rotating the rotating end 31, and then the falling rope is inserted into the biting post 33 along the opening position. Finally, by releasing the rotating end 31, the opening of the rotating end 31 is offset from the opening of the base end 32, and the biting post with the U-shaped opening, which is integrated with the rotating end 31, closes the falling rope in the U-shaped space.

[0061] More specifically, the base end 32 has an engagement structure inside that releases the rotating end 31. The engagement structure causes the rotating end 31 to be misaligned with the base end 32, thus enclosing the downward rope within a U-shaped space.

[0062] In a third preferred embodiment of the cap-type stratified water sampler, when sealing the collected water sample, the rubber bands 5 connecting the plugs 4 at both ends of the sampler bottle 1 need to be hooked in the hooks on the plugs 4. The top plug 41 and the bottom plug 42 are only fixed by the tension between the rubber bands 5. During water collection, improper force often causes the rubber bands 5 to detach from the hooks on the plugs 4. The relatively long and thin sampler bottle 1, and the relatively short rubber bands 5 after detachment and stress relief, both make reinstallation difficult, requiring the use of ropes or other external objects, further complicating water sample collection. Therefore, in this embodiment, an anti-detachment structure 4231 is added to the plugs 4 to prevent the rubber bands 5 from detaching during water collection.

[0063] Specifically, the plug 4 includes a top plug 41 and a bottom plug 42. In this embodiment, the bottom plug 42 has the same structure as the top plug 41. The bottom plug 42 will be described in detail as an example.

[0064] like Figure 6As shown, the bottom plug 42 includes a support 421, a cap 422, and a hook 423. Both the support 421 and the hook 423 are located at the center of the cap 422, and at opposite ends of the cap 422. Specifically, the support 421 is located at the end furthest from the water sampler bottle 1, and the hook 423 is located at the end closest to the water sampler bottle 1. The anti-disengagement structure 4231 is located on the hook 423 and closes the notch formed by the hook 423.

[0065] The anti-disengagement structure 4231 may include a pin, a retaining spring, and a buckle. The pin connects the hook 423 to the buckle, the retaining spring is located on the pin, and the buckle closes the notch of the hook 423.

[0066] The buckle is a metal piece with a certain width that closes the notch of the hook 423.

[0067] In the fourth preferred embodiment of the cap-type stratified water sampler, after water sampling is completed, the water sample collected from the designated depth needs to be transferred to the container. However, the bottom support of the traditional bottom plug 42 is not long enough. Even when the water sampler is placed vertically on the ground, the vertical distance between the outlet pipe 424 and the ground is too small. This means that during the water transfer process, the water sampler needs to be manually lifted to ensure that the outlet of the outlet pipe 424 is higher than the inlet of the container, which increases the difficulty of water sample transfer. Furthermore, during the water sample transfer process, water spillage often occurs due to human factors such as sampler shaking, which may necessitate secondary water sampling at the same depth, thus increasing the overall sampling workload and the instability of the sampling process.

[0068] Therefore, in this embodiment, the length of the support column of the bottom plug 42 can be increased to ensure that, after the increased length, when the bottom end of the support column is placed on the ground, there is a first height difference between the water outlet of the water outlet pipe 424 and the water inlet of the container. The first height difference ranges from 50mm to 100mm, and the length of the support column ranges from 250mm to 350mm. At this time, the length of the support column of the top plug 41 is not required.

[0069] In a fifth preferred embodiment of the cap-type stratified water sampler, for situations where it is difficult to smoothly transfer the collected water sample into the container, the length of the support column of the bottom plug 42 is not changed; instead, a support structure 7 matching the bottom plug 42 is provided. The support structure 7 ensures that, when the water sampler bottle 1 is upright, a sufficient second height difference is formed between the outlet of the water pipe 424 and the inlet of the container. The second height difference ranges from 100mm to 200mm, and the height of the outlet of the water pipe 424 is higher than the height of the inlet of the container.

[0070] Specifically, the support structure 7 is located below the water sampler bottle 1 and is positioned near the counterweight structure 6 to support the water sampler bottle 1, while also facilitating the transfer of water from inside the water sampler bottle 1 to a designated container.

[0071] The support structure 7 may include a support leg 71 and a docking block 72, such as Figure 7 As shown, the support legs 71 are located around the docking block 72 and are evenly distributed, preferably in groups of three, to increase stability. The docking block 72 is located at one end closer to the bottom plug 42, and the support legs 71 are located at the other end farther from the bottom plug 42.

[0072] More specifically, the support bracket 71 can be a tripod with an extendable length to adjust the height of the water outlet from the ground after the water sampler bottle 1 is upright. The docking block 72 has a groove 721 at the center to facilitate the insertion of the support column 421 of the bottom plug 42.

[0073] The docking block 72 works in conjunction with the bottom plug 42 to stably fix the water sampler bottle 1 onto the support bracket 71. The diameter of the groove 721 matches the diameter of the support column 421, and the depth of the groove 721 must be less than the length of the support column 421. Preferably, the depth of the groove 721 is set to 30mm~50mm to allow space for the flexible hose to be connected to the water outlet pipe on the bottom plug 42. The support structure 7 not only frees up manpower, but also, compared to increasing the length of the support column 421 on the bottom plug 42, the support structure 7 can better fit the water sampler bottle 1, greatly facilitating water sample collection. Even when the water outlet of the water sampler bottle 1 is small, the water flow rate is slow, and the collection time is long, the collected water sample can be transferred smoothly, labor-savingly, and without waste.

[0074] The sixth preferred embodiment of the cap-type stratified water sampler, as described above. Figure 10As shown, the water sampler bottle 1 collects water through the water inlet 12 provided on its outer wall. In this embodiment, the water sampler bottle 1 is not sealed by impacting the release structure with a hammer, and the rubber band 5 is not installed inside the water sampler bottle 1. This avoids the problem that the hammer may fail to land smoothly during the process of striking the release structure 2. It also avoids the problem of the rubber band 5 falling out of the hook of the plug 4.

[0075] It should be noted that, in this embodiment, the following can be adopted: Figure 1 or Figure 3 The counterweight structure shown can be locally increased in weight, or the overall weight can be increased by selecting a material with a higher density or increasing the overall thickness of the water sampler bottle 1.

[0076] In this embodiment, as Figure 8 As shown, the water sampler includes a sampler body 1. A pressure box 8 and an opening structure 9 are also provided on the inner wall of the sampler body 1. The pressure box 8 controls the pressure required for the water inlet to open after reaching a designated water layer. The opening structure 9, under the control of the pressure box 8, opens the water inlet 12. At this time, the top plug 41 of the sampler body 1 seals the top of the sampler body 1. The specific sealing method is not required. That is, a spiral seal or a clamping seal can be used, or it can be integrally cast with the sampler body 1. Under the pressure of water, the bottom plug 42 of the sampler body 1 moves along the inner wall of the sampler body 1 at the bottom, sealing the interior of the sampler body 1 as it moves.

[0077] The pressure valve 14 is installed on the rear side of the outer wall of the water sampler bottle 1, and a one-way valve 13 is installed on the front side of the outer wall of the water sampler bottle 1, at a position where the pressure box 8 is not located. The one-way valve 13 discharges gas from inside the water sampler bottle 1 during water sample collection. The one-way valve 13 is located near the top plug 41, allowing only gas or liquid from inside the water sampler bottle 1 to be discharged, preventing external liquid from entering.

[0078] Specifically, such as Figure 11 As shown, mounting holes 15 are provided on the left and right side walls of the water sampler bottle 1, allowing the pressure box 8 to be mounted on the water sampler bottle 1. When the water sampler bottle 1 descends to a designated water depth, the opening structure 9 is activated to open the water inlet 12. The opening structure 9 is located below the pressure box 8, away from the top plug 41, and opens the water inlet 12.

[0079] In this embodiment, the pressure box 8 and the opening structure 9 are preferably disposed on the left and right sides of the water sampler bottle 1.

[0080] Specifically, the opening structure 9 includes a rotating block 92, a gear 93, and a gear rack 91. The gear 93 is connected to the front side of the rotating block 92, and the gear rack 91 meshes with the gear 93. The gear 93 is located in a shallow groove 16 on the inner wall of the water sampler bottle 1. The shallow groove 16 is located in the middle of the vertical direction of the water inlet 12 and is located in front of the water inlet 12. The gear 93 is located in the shallow groove 16 and connected to the rotating block 92. The gear rack 91 can move up and down along the inner wall of the water sampler bottle 1. The top end of the gear rack 91 is connected to the end of the third movable plate 833 of the pressure box 8 near the bottom plug 42; the bottom end of the gear rack 91 is connected to the inner side of the bottom plug 42, i.e., the side facing the inside of the water sampler bottle 1. The rotating block 92 is disposed inside the water intake 12. When the water intake 12 is closed, the rotating block 92 is vertical, blocking the water intake 12. When the water intake 12 is open, the rotating block 92 is horizontal, and the water intake 12 is open. When the water sampler reaches the designated water layer, the bottom plug 42 is subjected to pressure and moves upward, i.e., moves towards the top plug 41. This causes the gear rack 91 to move upward, driving the rotating block 92 to rotate, thus opening the water intake 12. Conversely, it closes the water intake 12.

[0081] Specifically, such as Figure 9 As shown, the pressure box 8 contains three movable plates 83. A first movable plate 831 is located at the upper part of the pressure box 8, and two more movable plates, a second movable plate 832 and a third movable plate 833, are located at the lower part of the pressure box 8. A first telescopic spring 821 is provided between the first movable plate 831 and the body of the pressure box 8, and a second telescopic spring 822 is provided between the second movable plate 832 and the third movable plate 833. A control core 85 is located in the middle of the pressure box 8, between the first movable plate 831 and the second movable plate 832.

[0082] The control core 85 is provided with a pressure rod 84 and a center insertion rod 81. The center insertion rod 81 is inserted into the control core 85, and the depth of the center insertion rod 81 inserted into the pressure rod 84 in the control core 85 is used to adjust the corresponding pressure required to open the water intake port 12 when entering different water layers.

[0083] More specifically, the pressure rod 84 includes an upper pressure rod 842 and a lower pressure rod 841. The upper pressure rod 841 is movably connected to the first movable plate 831, and the lower pressure rod is movably connected to the second movable plate 832. The central insert rod 85 extends between the upper pressure rod 842 and the lower pressure rod 841. A hole is provided at the end of the control core 85 near the first movable plate 831, through which the upper pressure rod 842 passes and is movably connected to the first movable plate 831. A hole is also provided at the end of the control core 85 near the second movable plate 832, through which the lower pressure rod 841 passes and is movably connected to the second movable plate 832.

[0084] More specifically, the central insertion rod 81 includes a screw cap 811, a columnar rod 812, a triangular rod 813, and a pressure spring 814, wherein the screw cap 811 and part of the columnar rod 812 are located outside the water sampler bottle 1, and part of the columnar rod 812 and the triangular rod 813 are located inside the water sampler bottle 1.

[0085] The outer wall of the portion of the columnar rod 812 located inside the water sampler bottle 1 is threaded, allowing the columnar rod 812 to rotate and penetrate into the control core 85. Similarly, a threaded hole is provided on the outer wall of the water sampler bottle 1, and a threaded hole is also provided at the end of the control core 85 near the screw cap 811, allowing the columnar rod 812 to be screwed into the control core 85.

[0086] A pressure spring 814 is installed inside the portion of the columnar rod 812 located within the water sampler bottle 1. One end of the pressure spring 814 is connected to the columnar rod 812, and the other end is connected to the triangular rod 813. After the water sampler bottle 1 has collected a water sample, the elastic force of the pressure spring 814, combined with the weight of the water sample, causes the bottom plug 42 to return to its original position, thereby closing the water inlet 12.

[0087] Specifically, the pressure value for opening the water inlet 12 corresponding to different water layers can be provided on the periphery of the rotating cap 811 and on the water sampler bottle 1. Rotating to the corresponding pressure value determines the pressure required for the water inlet of the specified water layer.

[0088] The water sampler operates as follows: Before the sampler enters the water, the depth of the central insert rod 81 inserted into the pressure rod 84 is adjusted by rotating the cap 811, thereby adjusting the pressure required to open the water inlet 12 at the specified water depth. Simultaneously, before the sampler bottle 1 enters the water, the water inlet 12 on the outside of the bottle is sealed by the slider 92. When the specified water depth is reached, the pressure required to open the water inlet 12 is provided by the water pressure on the bottom plug 42. At this time, the bottom plug 42 moves upward along the inside of the sampler bottle 1 under the action of water pressure, causing the gear rack 91 to also move upward, driving the gear 93 meshing with the gear rack 91 and the rotating block 92 connected to the gear 93 to rotate, thereby opening the water inlet 12. When the gear rack 91 moves upward, it compresses the first telescopic spring 821 and the second telescopic spring 822. This causes the upper pressure rod 842 and the lower pressure rod 841 to simultaneously exert pressure on the triangular rod 813. The pressure rod 84 moves along the sides of the triangle, and the triangular rod 813 is pushed out laterally. During water sample collection, the water sample enters through the water inlet 12, and the gas inside the water sampler bottle 1 is discharged through the one-way valve 13. After water sample collection is completed, under the action of gravity and the elastic restoring force of the pressure spring 814, the central insertion rod 81 is reinserted between the upper pressure rod 842 and the lower pressure rod 841, and the plug 42 returns to its initial position before entering the water. Finally, the water sampler bottle 1, which has been sampled from the designated water layer, is slowly and uniformly pulled out of the water using a rope connected to the water sampler bottle 1 and equipped with an immersion depth indicator.

[0089] This invention discloses a cap-type layered water sampler. By setting a counterweight and a matching counterweight structure, the water sampler can maintain a perpendicular posture to the water surface and quickly reach the specified water sampling depth during deep water sampling. Furthermore, the support structure makes it easier, less strenuous, and more stable for the collected water sample to enter the receiving container. The increased hammer diameter and anti-disengagement structure also make the water sampling process smoother, greatly increasing the probability of successful water sampling on the first attempt and significantly improving the efficiency of deep water sampling.

[0090] The above description illustrates preferred embodiments of the present invention and helps those skilled in the art to more fully understand the technical solution of the present invention. However, these embodiments are merely illustrative and should not be construed as limiting the specific implementation of the present invention to these embodiments. For those skilled in the art, several simple deductions and modifications can be made without departing from the inventive concept, and all such modifications should be considered within the protection scope of the present invention.

Claims

1. A cap-and-cage type layered water sampler comprising a sampler bottle and a plug, characterized in that, The water sampler bottle body is provided with a water sampling port on the outer wall, and the top plug seals the top of the water sampler bottle body; the bottom plug of the water sampler bottle body moves along the inner wall of the water sampler bottle body under the action of water pressure and also seals the inside of the water sampler bottle body during the movement; A counterweight part is arranged on the water sampler bottle body, and a counterweight structure is arranged on the counterweight part, which includes a counterweight and a locking and fixing structure. The locking and fixing structure locks and fixes the counterweight, so that the counterweight is firmly fixed on the counterweight part and will not fall off during the descent of the water sampler bottle body. The counterweight is a pair of components with multiple specifications and weights; A pressure box and an opening structure are further arranged on the inner wall of the water sampler bottle body. The pressure box controls the pressure required for the water sampling port to open after reaching a specified water layer, and the opening structure opens the water sampling port under the control of the pressure box; Mounting holes are arranged on the left and right side walls of the water sampler bottle body. The mounting holes enable the pressure box to be mounted on the water sampler bottle body. The opening structure is below the pressure box and away from the end of the top plug; The opening structure includes a rotating block, a gear, and a gear strip. The front side of the rotating block is connected with the gear, and the gear strip is engaged with the gear. The pressure box has three movable plates. A first movable plate is arranged on the upper part of the pressure box, and two movable plates, i.e., a second movable plate and a third movable plate, are arranged on the lower part of the pressure box. A first extension spring is arranged between the first movable plate and the box body of the pressure box, and a second extension spring is arranged between the second movable plate and the third movable plate. A control core is arranged between the first movable plate and the second movable plate in the middle part of the pressure box. The gear strip moves up and down along the inner wall of the water sampler bottle body. The top end of the gear strip is connected with the third movable plate of the pressure box, which is close to the end of the bottom plug. The control core is provided with a pressure rod and a center plug rod. The center plug rod includes a rotating cap, a columnar rod, a triangular rod, and a pressure spring. The pressure rod includes an upper pressure rod and a lower pressure rod. The upper pressure rod is movably connected with the first movable plate, and the lower pressure rod is movably connected with the second movable plate. The triangular rod extends into the space between the upper pressure rod and the lower pressure rod. The depth of the center plug rod inserted into the pressure rod in the control core adjusts the corresponding pressure required for the water sampling port to open when entering different water layers.

2. The layered water sampler of claim 1, wherein, The counterweight is a series of arc-shaped pieces with multiple specifications, and the arc-shaped pieces with multiple specifications have the same length and arc, but different thicknesses. Each two arc-shaped pieces with the same specification are used in pairs to form an inner diameter that matches the outer diameter curvature of the counterweight part. The length of the counterweight part is greater than or equal to the length of a single arc-shaped piece, and less than or equal to 1 / 3 of the length of the water sampler bottle. The length of the counterweight part ranges from 120 mm to 160 mm. The depth of the counterweight part is less than or equal to the thickness of the arc-shaped piece with the minimum mass. The depth of the counterweight part ranges from 3 mm to 6 mm. The locking and fixing structure is separately arranged and used in cooperation with the counterweight, or the locking and fixing structure is integrally arranged and used in cooperation with the counterweight.

3. The layered water sampler of claim 2, wherein, An Ω-shaped fixing piece is arranged on the arc-shaped piece. When the counterweight is used in pairs, the Ω-shaped fixing pieces are located on the same vertical line. The locking and fixing structure is a D-shaped trailer pin or an R-shaped spring pin. The locking and fixing structure is located on the counterweight. The locking and fixing structure includes a lock and a latch. The latch is a horizontal rod with one end fixed and the other end free. The lock fixes the latch.

4. The layered water sampler of claim 1, wherein, A water outlet pipe is arranged on the bottom plug. The bottom plug and the top plug both include a support and a cover.

5. The layered water sampler of claim 4, wherein, The length of the support of the bottom plug is increased. After the length is increased, the bottom end of the support of the bottom plug has a sufficient first height difference between the water outlet of the water outlet pipe and the water inlet of the receiving container when placed on the ground. The first height difference ranges from 50 mm to 100 mm. The length of the support of the bottom plug ranges from 250 mm to 350 mm.

6. The layered water sampler of claim 4, wherein, A support structure matched with the bottom plug is arranged below the water sampler bottle. The support structure has a sufficient second height difference between the water outlet of the water outlet pipe and the water inlet of the receiving container when the water sampler bottle is vertical. The second height difference ranges from 100 mm to 200 mm.

7. The layered water sampler of claim 6, wherein, The support structure includes support legs and an abutting block. The support legs are located on the circumferential side of the abutting block and are evenly distributed. The abutting block is located at one end close to the bottom plug, and the support legs are located at the other end away from the bottom plug.

8. The layered water sampler of claim 7, wherein, The support legs are telescopic tripods. The height of the water outlet from the ground after the water sampler bottle is vertical is adjusted. The abutting block has a groove at the center position, so that the support of the bottom plug is inserted.

9. The layered water sampler of claim 8, wherein, The diameter of the groove matches the diameter of the support of the bottom plug. The depth of the groove is less than the length of the support of the bottom plug. The depth of the groove ranges from 30 mm to 50 mm, leaving a position for connecting a flexible hose of the water outlet pipe.

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