CN112393952B - Throwing type fixed-depth quantitative liquid taking device - Google Patents
Throwing type fixed-depth quantitative liquid taking device Download PDFInfo
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- CN112393952B CN112393952B CN202011199713.7A CN202011199713A CN112393952B CN 112393952 B CN112393952 B CN 112393952B CN 202011199713 A CN202011199713 A CN 202011199713A CN 112393952 B CN112393952 B CN 112393952B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B22/00—Buoys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B22/00—Buoys
- B63B2022/006—Buoys specially adapted for measuring or watch purposes
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Abstract
The invention provides a throwing type fixed-depth quantitative liquid taking device which comprises a floater, a liquid taking cabin, a buffering weight cabin and an outer frame, wherein the floater is used for being matched with a grabbing device to grab and throw, the liquid taking cabin is arranged below the floater and movably connected with the floater, the buffering weight cabin is arranged at the tail of the liquid taking cabin, and the outer frame is sleeved on the periphery of the floater. The throwing type fixed-depth quantitative liquid taking device adopts the design of an integrated integral structure formed by fixedly connecting the buffer counterweight cabin, the piston structure and the outer frame, and realizes the efficient and stable sample liquid taking process of the throwing type fixed-depth quantitative liquid taking device. Compared with the traditional manual sampling, the device has the advantages that the single sampling cost is low, and the real-time performance of the sample is strong; meanwhile, the throwing type structural design only needs to throw the liquid taking device down, and then the throwing point is removed at certain intervals to clamp the liquid taking device, so that the process is simple, the performance requirement on the gripping device is not high, and the practicability is high.
Description
Technical Field
The invention relates to the technical field of environmental monitoring, in particular to a throwing type fixed-depth quantitative liquid taking device.
Background
The detection of water quality usually requires quantitative sampling in different water areas and different water depths. At present, a conventional sampling method is to carry positioning equipment to take a water vehicle for manual sampling, the sampling tool is generally a portable peristaltic pump, the sampling process is complicated, and manpower and material resources are greatly consumed. Unmanned aerial vehicle sampling has work efficiency height, strong, the saving advantage such as sampling cost of real-time nature, and application in water sampling receives more and more attention. At present, water sample collection by using an unmanned aerial vehicle is a popular research, but most of the researches are biased to the fact that the unmanned aerial vehicle hovers for a long time to extract and sample, the possibility of rollover of the unmanned aerial vehicle when hovering for a long time and sampling are neglected due to factors such as large air density fluctuation above the water surface, wind waves and the like is not considered enough, and the stability of sampling depth is influenced by the factors; the equipment structure is complicated, and has higher requirements on the performance of the unmanned aerial vehicle.
Utility model patent with application number CN201920467605.X discloses a water intake device suitable for open waters. The device comprises an unmanned aerial vehicle, a wireless remote controller matched with the unmanned aerial vehicle and an assembled water taking device arranged at the bottom of the unmanned aerial vehicle; assembled water intaking device includes from last lid, a plurality of water storage cavity, the cavity of intaking, a plurality of balancing weight that down sets gradually, be equipped with bottom plate, the kicking block that has the gag lever post, limiting plate in the cavity of intaking, bottom plate middle part be equipped with kicking block assorted water inlet, still be equipped with a plurality of water holes of crossing on the limiting plate, water inlet department is arranged in to the kicking block, and the gag lever post at its top can reciprocate in the through-hole of limiting plate.
However, the hovering extraction type sampling device has the following defects: during sampling operation, the unmanned aerial vehicle needs to be kept at a certain fixed height to ensure the accuracy of the sample collection height, but the load of the unmanned aerial vehicle is gradually increased along with the accumulation of samples, so that the unmanned aerial vehicle needs to continuously adjust the self-generated balance capability, and the requirement on the control and regulation performance of the unmanned aerial vehicle is higher; and liquid mobility is stronger, and the liquid that is not full in the liquid reserve tank can aggravate unmanned aerial vehicle's rocking when the surface of water has the stormy waves, and unmanned aerial vehicle is difficult for hovering for a long time under the great condition of surface of water stormy waves. Simultaneously, unmanned aerial vehicle still need carry waterproof electromagnetic equipment, has increased unmanned aerial vehicle heavy burden, and has increased unmanned aerial vehicle protection and maintenance cost. And unmanned aerial vehicle formula sampling device of jettisoninging only need throw down the sampler, and it can to go the jettisoninging point clamp again at an interval a period and get the sampler, and the process is simple, and is not high to the unmanned aerial vehicle performance requirement, and the feasibility of practising is stronger.
Meanwhile, the existing liquid taking device is difficult to achieve the liquid taking effect of fixed depth and quantification when manual operation sampling is not carried out; in addition, in the prior art, a vertical liquid taking mode is mostly adopted, and bubbles are easy to exist in a liquid taking cabin during operation, so that the technical defect that the accuracy of a water quality sampling sample is influenced exists.
In view of the above, there is a need for an improved throwing type fixed-depth quantitative liquid-fetching device to solve the above problems.
Disclosure of Invention
The invention aims to provide a fixed-depth and fixed-quantity liquid taking device based on a throwing type.
In order to achieve the purpose, the invention provides a throwing type fixed-depth quantitative liquid taking device which comprises a floater, a liquid taking cabin, a buffering weight cabin and an outer frame, wherein the floater is used for being matched with a grabbing device to grab and throw, the liquid taking cabin is arranged below the floater and movably connected with the floater, the buffering weight cabin is arranged at the tail of the liquid taking cabin, and the outer frame is sleeved on the periphery of the floater and used for being matched with the grabbing device to grab and throw.
As a further modification of the invention, the liquid taking cabin comprises a hanging bracket which is arranged at the top of the liquid taking cabin and is used for connecting the floater and has an M-shaped structure, a liquid taking cabin main body fixedly connected with the hanging bracket, and a liquid inlet which is arranged below the hanging bracket and is connected with the liquid taking cabin main body through a pipeline.
As a further modification of the invention, the liquid taking cabin further comprises a piston rubber head in sliding connection with the liquid taking cabin main body and a piston rod fixedly connected with the piston rubber head.
As a further modification of the invention, the piston rod is of an internal hollow structure and comprises a piston hollow passage with one end vertically penetrating through the central through hole of the piston rubber head, a liquid taking passage vertically bent and extending along the other end of the piston hollow passage, and a sealing cover sleeved on the end part of the liquid taking passage.
As a further modification of the invention, the liquid taking cabin further comprises a support arranged at the bottom of the liquid taking cabin, and a support through hole for the piston hollow passage to penetrate through is arranged on the support.
As a further modification of the invention, the piston rod is fixedly connected with the buffering counterweight cabin.
As a further modification of the invention, the buffer counterweight cabin is designed to be an unbalanced structure and comprises a counterweight area and a buffer air cabin which are oppositely arranged at the left and the right.
As a further modification of the invention, the outer frame is fixedly connected with the buffer counterweight cabin; the top of the outer frame is provided with a round frame which is parallel and level to the floater and is convenient for the grabbing device to grab and throw.
As a further modification of the invention, the outer frame further comprises a quantity control shelf which is arranged between the floater and the liquid taking cabin and is fixedly arranged on the outer frame.
As a further modification of the invention, one end of the piston hollow passage is provided with a convex rubber thin flap; a convex rubber thin flap is also arranged in the liquid inlet.
The invention has the beneficial effects that:
1. the throwing type fixed-depth quantitative liquid taking device provided by the invention adopts the design of an integrated integral structure which is fixedly connected with a buffer counterweight cabin, a piston structure (comprising a piston rubber head and a piston rod) and an outer frame, so that the efficient and stable sample liquid taking process of the throwing type fixed-depth quantitative liquid taking device is realized. The sampling working principle is as follows: in order to correct the water inlet posture of the liquid taking device, the unbalanced design of the buffer counterweight cabin is adopted, when the liquid taking cabin enters water, the bottom of the liquid taking cabin needs to be inclined, water is filled in the bottom (tail) of the main body of the liquid taking cabin when water is not collected, and air at the bottom of the main body of the liquid taking cabin is emptied; the design of the porous structure on the surface of the buffer air cabin is to enable the bottom of the liquid taking cabin to float firstly and then sink wholly after being filled with water;
that is, the throwing type fixed-depth quantitative liquid taking device can incline when being thrown into water, firstly, based on the fact that the head of the liquid taking cabin is heavier, a piston rod at the tail of the liquid taking cabin is fixedly connected with the buffering counterweight cabin, and the head of the liquid taking cabin sinks firstly; then, the buffer counterweight cabin can sink into the water after the head of the liquid taking cabin sinks due to the existence of the buffer air cabin; when the liquid taking cabin and the counterweight area of the buffer counterweight cabin sink together, the initial speeds are consistent, and the weights are consistent, so that the sinking speeds are consistent. Then, after reaching the preset liquid taking height (fixed depth), the liquid taking cabin stops sinking, and the function of fixed depth sampling is achieved. The buffering balance weight cabin drives the piston rod to continuously sink because the gravity borne by the buffering balance weight cabin is greater than the frictional resistance provided by the piston rubber head, so that the piston rubber head slides to the tail part of the liquid taking cabin to extract a liquid sample; when the liquid taking cabin is contacted with the quantity control shelf fixedly arranged on the outer frame, the buffer counterweight cabin is not sunk any more because the buffer counterweight cabin and the outer frame are fixedly connected into an integral structure, and the quantitative liquid taking process is completed.
Therefore, the structures are mutually matched and cooperated, and the high-efficiency and stable depth-fixed quantitative liquid taking process of the throwing type depth-fixed quantitative liquid taking device is realized.
2. Compared with the traditional manual sampling, the throwing type fixed-depth quantitative liquid taking device provided by the invention is low in single sampling cost and strong in sample real-time property; compare in unmanned aerial vehicle of long-time extraction sampling of hovering snatchs and adopts the device, this device is lower to performance requirements such as unmanned aerial vehicle balancing ability, duration, heavy burden ability, and simple structure, and device low in manufacturing cost, the sample representativeness that takes is high.
3. The throwing type fixed-depth quantitative liquid taking device provided by the invention adopts a throwing type structural design, and an unmanned aerial vehicle does not need to stay on the water surface for a long time, so that stronger cruising ability is not needed; grabbing devices such as unmanned aerial vehicle do not have heavy burden such as various complicated expensive electronic sensor and peristaltic pump, and do not have the burden that the extension absorbed water pipe when getting deeper regional water sample, so can alleviate heavy burden, reduce device manufacturing cost. Simultaneously, this formula of jettisoninging structural design only needs to throw down and gets liquid device, go again to jettisoning point clamp get liquid device can after a period, the process is simple, and is not high to unmanned aerial vehicle performance requirement, and the feasibility of execution is stronger.
Drawings
Fig. 1 is a schematic structural view of a throwing type fixed-depth quantitative liquid taking device provided by the invention.
Fig. 2 is a top view of a support of the tossing-type fixed-depth quantitative liquid taking device provided by the invention.
Reference numerals
20-a throwing type fixed-depth quantitative liquid taking device; 21-a float; 211-take-up rotating head; 2111-permanent magnet; 212-a catch groove; 213-control high-line box; 214-controlling altitude; 22-a liquid taking cabin; 221-a hanger; 222-a liquid inlet; 223-liquid taking cabin main body; 224-piston rubber head; 225-a piston rod; 2251-hollow passage of piston; 2252-access to fluid; 2253-sealing cover; 226-a scaffold; 2261-bracket through hole; 23-a buffer weight compartment; 231-a counterweight zone; 232-buffer gas chamber; 24-an outer frame; 241-round frame; 242-quantity control layer shelf.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the present invention is provided in the following embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, the tossing-type fixed-depth quantitative liquid-fetching device 20 includes a float 21 matched with the grabbing device, a liquid-fetching cabin 22 disposed below the float 21 and movably connected with the float 21, a buffering weight cabin 23 disposed at the tail of the liquid-fetching cabin 22, and an outer frame 24 sleeved on the periphery of the float 21.
In this embodiment, the float 21 is a concave spherical structure, and includes a wire-receiving rotating head 211 disposed at the top thereof and matching with a butt joint in a grabbing device, a grabbing groove 212 disposed below the wire-receiving rotating head 211 and matching with the grabbing device, a height control line box 213 disposed at the bottom of the float 21, and a height control line 214 disposed on the height control line box 213 and connected with the liquid-taking tank 22.
The working principle of the structural design is as follows: the concave spherical design of the floater 21 is convenient for the grabbing groove 212 to be exposed out of the water surface when the liquid taking work is carried out; when the take-up rotating head 211 at the top of the floater 21 rotates, the height control line 214 in the height control line box 213 below the floater 21 can be retracted; the permanent magnet 2111 is embedded and connected to the wire take-up rotating head 211, and the structural design of the permanent magnet is to facilitate the butt joint of the wire take-up rotating head 211 and the butt joint of the gripping device. Meanwhile, the grabbing groove 212 of the floater 21 is designed as an annular groove, so that the floater 21 can fall off quickly when the grabbing device is thrown, and the grabbing device can grab the floater 21 quickly when grabbing. In addition, the bottom of the floater 21 is provided with a height control line box 213 for controlling the liquid taking height of the throwing type depth-fixed quantitative liquid taking device 20, and the resistance is small and negligible when the height control line box 213 is paid off.
Referring to fig. 1 and 2, the liquid taking chamber 22 includes a hanging bracket 221 of an M-shaped structure disposed at the top thereof and used for connecting the height control line 214 inside the height control line box 213, a liquid taking chamber main body 223 fixedly connected with the hanging bracket 221, a liquid inlet 222 disposed below the hanging bracket 221 and connected with the liquid taking chamber main body 223 through a pipeline, a piston rubber head 224 slidably connected with the liquid taking chamber main body 223, a piston rod 225 fixedly connected with the piston rubber head 224, and a support 226 disposed at the bottom of the liquid taking chamber 22.
In this embodiment, the piston rod 225 is a hollow pipe structure, and includes a hollow piston passage 2251 with one end passing through the central through hole of the piston rubber head 224, a liquid taking passage 2252 extending along the other end of the hollow piston passage 2251, and a cover 2253 covering the end of the liquid taking passage 2252. The piston rod 225 is fixedly connected with the buffering weight chamber 23.
One end of the piston hollow passage 2251 is provided with a convex rubber thin flap (not marked in the figure); a convex rubber flap (not labeled) is also disposed in the inlet port 222. Meanwhile, the holder 226 is provided with a holder through hole 2261 (shown in fig. 2) for the piston hollow passage 2251 to penetrate through.
The working principle of the structural design is as follows: the liquid taking tank 22 is integrally similar to a piston structure, a hanging bracket 221 is arranged at the top of the liquid taking tank and is used for connecting the control height line 214, and the hanging bracket 221 is designed in an M-shaped structure, so that a heavier object can be hung under the condition of the same strength material. The convex rubber thin valve is arranged in the liquid inlet 222 below the hanging bracket 221, so that the liquid inlet 222 can be opened in liquid collecting and taking states, and can be closed in other states, so that the communication between liquid in the liquid taking cabin 22 and external liquid can be prevented, and the accuracy of a liquid taking sample is ensured.
The piston structure (the piston rubber head 224 and the piston rod 225) in the liquid taking chamber 22 is fixedly connected with the buffering balance weight chamber 23 arranged at the bottom (tail) of the liquid taking chamber 22, namely, the piston rubber head 224, the piston rod 225 and the buffering balance weight chamber 23 are integrally designed; wherein, piston rod 225 is inside hollow pipeline structure, and the direct closing cap 2253 that opens on the piston rod 225 bottom liquid taking passageway 2252 extracts can realize getting liquid when getting liquid, and also is provided with the thin lamella of convex rubber at piston hollow passageway 2251 top, so sets up for open bottom closing cap 2253 back during getting liquid, liquid can not flow out automatically because of gravity, can effectively prevent to open the technical defect that bottom closing cap 2253 can lead to liquid to flow out immediately when getting liquid. In addition, a support through hole 2261 for the piston hollow passage 2251 to penetrate through is arranged on the support 226 at the bottom of the liquid taking chamber 22, and the piston hollow passage 2251 penetrates through the support through hole 2261 to play a role in limiting and fixing, that is, the structural design of the support through hole 2261 can ensure that the piston rod 225 does not incline or move in a deviating manner in the liquid taking or underwater sampling process, thereby ensuring that the liquid taking process is performed smoothly.
Referring to fig. 1, the buffering weight compartment 23 is an unbalanced structure, and includes a weight region 231 and a buffering air compartment 232 disposed opposite to each other. The purpose of the unbalanced design of the buffer counterweight cabin adopted by the invention is to correct the water inlet posture of the throwing type fixed-depth quantitative liquid taking device 20, and the correction process comprises the following steps: when the liquid taking cabin 22 is thrown into water, the bottom of the liquid taking cabin 22 needs to be firstly inclined, so that the bottom (tail) of the liquid taking cabin main body 223 when water is not collected is filled with the water, and air at the bottom of the liquid taking cabin main body 223 is emptied; the design of the porous structure on the surface of the buffer air chamber 232 is to make the bottom of the liquid taking chamber 22 float first, and then sink completely after the liquid taking chamber main body 223 is filled with water.
The working principle of the structural design is as follows: the unbalanced slow sinking structure design of the buffer counterweight chamber 23 is that a counterweight area 231 on one side is provided with a weight which is heavier than the buffer gas chamber 232, and the piston rod 225 can be pulled under the action of gravity in a liquid or water body environment, so that the piston rubber head 224 slides under the pulling of the piston rod 225; the other side is a buffer air chamber 232 with a small number of small hole structures distributed on the surface, which can ensure that the buffer counterweight chamber 23 sinks after falling into water than the liquid taking chamber 22; the unbalanced design is to prevent the throwing type fixed-depth quantitative liquid taking device 20 from tilting after falling into water, so as to correct the water inlet posture of the throwing type fixed-depth quantitative liquid taking device 20.
Referring to fig. 1, the outer frame 24 includes a circular frame 241 disposed on the top thereof and flush with the float 21 for facilitating grasping by the grasping device, a liquid control shelf 242 disposed between the float 21 and the liquid taking chamber 22 and fixedly mounted on the outer frame 24 for controlling the amount of liquid taken, and a foot stand (not labeled in the figure) for supporting the ground. The outer frame 24 is fixedly connected with the buffering weight cabin 23.
In the present invention, when the throwing type constant depth and quantity liquid taking device 20 performs a sampling operation, the gripping device grips the circular frame 241 on the top of the outer frame 24, and throws the throwing type constant depth and quantity liquid taking device 20 to a specified water area. After the throwing type fixed-depth quantitative liquid taking device 20 falls into water, the floater 21 floats out of the outer frame 24 and is separated due to the buffer effect and always floats on the water surface, so that the grabbing device can conveniently position, grab and retrieve; due to the unbalanced design of the buffer counterweight cabin 23, the throwing type fixed-depth quantitative liquid taking device 20 can incline after entering water, the support 226 at the bottom in the liquid taking cabin 22 is in a hollow design, and the piston rod 225 is fixedly connected with the buffer counterweight cabin 23 because the head of the liquid taking cabin 22 is heavier, so that the head of the liquid taking cabin 22 can sink firstly; the buffer weight chamber 23 sinks into the water after the head of the liquid taking chamber 22 sinks due to the existence of the buffer air chamber 232; when the liquid taking cabin 22 sinks together with the counterweight zone 231 of the buffering counterweight cabin 23, the initial speeds are consistent, and the gravity is consistent, so that the sinking speeds are consistent, the water inlet posture of the throwing type fixed-depth quantitative liquid taking device 20 is corrected, the air at the bottom of the liquid taking cabin body 223 is emptied, and bubbles are prevented from being generated.
In this process, the height control lines 214 in the height control line box 213 are continuously released until reaching the preset maximum length, that is, the liquid taking height at the fixed depth, and then the liquid taking tank 22 stops sinking, so as to achieve the function of sampling at the fixed depth. The buffering weight cabin 23 drives the piston rod 225 to continuously sink because the gravity borne by the buffering weight cabin is greater than the frictional resistance provided by the piston rubber head 224, so that the piston rubber head 224 slides towards the tail of the liquid taking cabin main body 223 to extract a liquid sample; when the liquid taking cabin 22 contacts the quantity control layer rack 242, the buffer weight cabin 23 does not sink any more due to the integral structure of the fixed connection between the buffer weight cabin 23 and the outer frame 24, and the quantitative liquid taking process is completed. Therefore, the processes are mutually matched and cooperated, and the high-efficiency and stable depth-fixed quantitative liquid taking process of the throwing type depth-fixed quantitative liquid taking device 20 is realized.
After the liquid is taken, the gripping device is arranged above the throwing type fixed-depth quantitative liquid taking device 20, the distance and the position between the gripping device and the throwing type fixed-depth quantitative liquid taking device 20 are adjusted, the wire taking-up rotating head 211 on the top of the floater 21 is in butt joint with a butt joint on the gripping device in a driving mode, a mechanical claw receiving claw of the gripping device immediately grips the fixed floater 21, the butt joint rotates, and the wire taking-up rotating head 211 is driven to take up wires in a rotating mode (namely, the height control line 214 inside the height control wire box 213). After the wire is taken up, the floater 21 slides into the outer frame 24, the round frame 241 on the top of the outer frame 24 is kept level with the top of the floater 21, then the mechanical claw of the grabbing device hooks the round frame 241, and after grabbing is finished, the device returns to a preset place, and the collection process of the sample is realized. Since the friction force of the piston rubber head 224 is greater than the gravity of the liquid taking chamber 22, the liquid in the liquid taking chamber 22 cannot overflow after being put down, and therefore the liquid needs to be extracted by opening the sealing cover 2253.
It should be noted that, as those skilled in the art should understand, the carrier of the gripping device may be an unmanned aerial vehicle, and may also be other types of carriers, and through the gripping device disposed on the carrier, the throwing and gripping processes of the throwing type fixed-depth quantitative liquid taking device 20 can be stably carried out, so as to realize the fixed-depth quantitative sampling function.
In summary, the invention provides a throwing type fixed-depth quantitative liquid taking device, which comprises a floater used for being matched with a grabbing device to grab and throw, a liquid taking cabin arranged below the floater and movably connected with the floater, a buffering weight cabin arranged at the tail part of the liquid taking cabin, and an outer frame sleeved on the periphery of the floater and used for being matched with the grabbing device to grab and throw. The throwing type fixed-depth quantitative liquid taking device adopts the design of an integrated integral structure formed by fixedly connecting the buffer counterweight cabin, the piston structure and the outer frame, and realizes the efficient and stable sample liquid taking process of the throwing type fixed-depth quantitative liquid taking device. Compared with the traditional manual sampling, the device has the advantages that the single sampling cost is low, and the real-time performance of the sample is strong; meanwhile, the throwing type structural design only needs to throw the liquid taking device down, and then the throwing point is removed at certain intervals to clamp the liquid taking device, so that the process is simple, the performance requirement on the gripping device is not high, and the practicability is high.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (4)
1. The utility model provides a formula of jettisoninging depthkeeping ration liquid device of getting which characterized in that: the throwing type fixed-depth quantitative liquid taking device (20) comprises a floater (21) used for being matched with a grabbing device to grab and throw, a liquid taking cabin (22) arranged below the floater (21) and movably connected with the floater (21), a buffering weight cabin (23) arranged at the tail of the liquid taking cabin (22) and an outer frame (24) sleeved on the periphery of the floater (21); the buffer counterweight cabin (23) is designed to be an unbalanced structure and comprises a counterweight area (231) and a buffer air cabin (232) which are oppositely arranged at the left and the right; the outer frame (24) is fixedly connected with the buffering counterweight cabin (23); the top of the outer frame (24) is provided with a round frame (241) which is flush with the floater (21) and is convenient for the grabbing device to grab and throw; the outer frame (24) further comprises a quantity control shelf (242) which is arranged between the floater (21) and the liquid taking cabin (22) and is fixedly arranged on the outer frame (24); the floater (21) is of a concave spherical structure and comprises a take-up rotating head (211) arranged at the top of the floater and matched with a butt joint in a grabbing device, a grabbing groove (212) arranged below the take-up rotating head (211) and matched with the grabbing device, a height control box (213) arranged at the bottom of the floater (21) and a height control line (214) arranged on the height control box (213) and connected with the liquid taking cabin (22);
the liquid taking cabin (22) comprises a hanging bracket (221) which is arranged at the top of the liquid taking cabin and is used for being connected with the floater (21) and has an M-shaped structure, a liquid taking cabin main body (223) fixedly connected with the hanging bracket (221), and a liquid inlet (222) which is arranged below the hanging bracket (221) and is connected with the liquid taking cabin main body (223) through a pipeline;
the hanging bracket (221) is used for connecting a control altitude (214);
the liquid taking cabin (22) further comprises a piston rubber head (224) in sliding connection with the liquid taking cabin main body (223) and a piston rod (225) fixedly connected with the piston rubber head (224);
the piston rod (225) is fixedly connected with the buffering counterweight cabin (23);
a convex rubber thin flap is arranged in the liquid inlet (222) to realize that the liquid inlet (222) can be opened in liquid inlet and outlet states and closed in other states;
the water inlet posture of the throwing type fixed-depth quantitative liquid taking device (20) can be corrected by adopting the unbalanced design of the buffer counterweight cabin, and the liquid taking cabin (22) sinks at the head part firstly based on the fact that the head part of the liquid taking cabin (22) is heavier; the buffer counterweight chamber (23) can sink into water after the head of the liquid taking chamber (22) sinks due to the existence of the buffer air chamber (232), the bottom of the liquid taking chamber (22) is inclined, water is filled in the bottom of the liquid taking chamber main body (223) when water is not collected, and air at the bottom of the liquid taking chamber main body (223) is emptied;
then, continuously releasing the height control wires (214) in the height control wire box (213) until reaching the liquid taking height with fixed depth, and stopping the liquid taking cabin (22) from sinking; then, the buffering weight cabin (23) drives the piston rod (225) to continuously sink due to the fact that the gravity borne by the buffering weight cabin is larger than the friction resistance provided by the piston rubber head (224), so that the piston rubber head (224) slides towards the tail of the liquid taking cabin main body (223) to extract a liquid sample;
when the liquid taking cabin (22) is in contact with the quantity control layer frame (242), the buffer counterweight cabin (23) does not sink any more due to the fact that the buffer counterweight cabin (23) and the outer frame (24) are of an integral structure which is fixedly connected, and the quantitative liquid taking process is completed.
2. The tossing type fixed-depth quantitative liquid taking device according to claim 1, wherein: the piston rod (225) is of an internal hollow structure and comprises a piston hollow passage (2251) with one end vertically penetrating through a central through hole of the piston rubber head (224), a liquid taking passage (2252) vertically bent and extending along the other end of the piston hollow passage (2251), and a sealing cover (2253) sleeved at the end part of the liquid taking passage (2252).
3. The tossing type fixed-depth quantitative liquid taking device according to claim 2, wherein: the liquid taking cabin (22) further comprises a support (226) arranged at the bottom of the liquid taking cabin, and a support through hole (2261) for the piston hollow passage (2251) to penetrate through is formed in the support (226).
4. The jettisoning fixed-depth quantitative liquid taking device according to claim 2, wherein: one end of the piston hollow passage (2251) is provided with a convex rubber thin flap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011199713.7A CN112393952B (en) | 2020-10-30 | 2020-10-30 | Throwing type fixed-depth quantitative liquid taking device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011199713.7A CN112393952B (en) | 2020-10-30 | 2020-10-30 | Throwing type fixed-depth quantitative liquid taking device |
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| CN112393952A CN112393952A (en) | 2021-02-23 |
| CN112393952B true CN112393952B (en) | 2022-10-21 |
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Citations (14)
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