Water sample collection device for water ecology investigation

Abstract

The utility model provides a water sample collecting device for water ecology investigation, and relates to the technical field of collecting devices. Comprising a barrel and a piston assembly, an extraction cavity is formed in the barrel, and the piston assembly is arranged in the extraction cavity in a penetrating mode; the water inlet is formed in the bottom of the barrel; a heating groove is formed in the inner wall of the water inlet, and a heating body is arranged in the heating groove; the sealing ring is arranged in the water inlet and is in contact with the heating body; the cover plate is rotationally connected with the bottom of the barrel; a first fixing part is arranged on the outer wall of the cylinder body, and a second fixing part is arranged on the connecting part; one end of the elastic body is arranged on the first fixing part, and the other end penetrates through the fixing frame and then is connected with the second fixing part; the limiting assembly is arranged on the fixing frame; the water sample collecting device for water ecology investigation can be stably adapted to field sampling scenes in cold regions such as winter and high altitude; meanwhile, the cross contamination of the previous sampling residual water and the newly collected water sample is avoided, so that the authenticity and the accuracy of the detection result are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of data collection device technology, and in particular to a water sample collection device for water ecological surveys. Background Technology

[0002] In fields such as environmental monitoring, water quality analysis, and hydrological research, water sampling equipment is a core tool for obtaining accurate monitoring data. Its sampling accuracy, environmental adaptability, and ease of cleaning directly determine the reliability of subsequent analysis results. Currently, field water sampling scenarios are complex and diverse. Especially in low-temperature environments such as winter, high altitudes, or cold regions, it is necessary to ensure airtightness to prevent high water levels from entering the extraction chamber before collection or leakage of water samples from the extraction chamber through the inlet after collection.

[0003] In existing technologies, the inlet of the sampling device is sealed using a combination of a cover plate and a sealing ring. However, nitrile rubber (NBR) is typically used as the sealing ring material. While NBR exhibits good elasticity and sealing properties at room temperature, ensuring no leakage between the cover plate sealing the extraction chamber and the inlet, its molecular chain activity significantly decreases in low-temperature environments, such as below -5°C, leading to hardening, embrittlement, and a substantial decrease or even complete loss of elasticity. In such cases, the inlet cannot be properly sealed. After the sampling device is submerged in water, high-level water can enter the extraction chamber through the inlet, resulting in inaccurate extraction results. Furthermore, after water sampling, leakage from the extraction chamber through the inlet can cause sample loss, affecting subsequent normal testing. Utility Model Content

[0004] The purpose of this utility model is to provide a water sample collection device for water ecological surveys, which can solve the above-mentioned technical problems.

[0005] This utility model provides a water sampling device for aquatic ecological surveys, comprising: a cylindrical body and a piston assembly; an extraction chamber is formed inside the cylindrical body, and the piston assembly passes through the extraction chamber; a water inlet is located at the bottom of the cylindrical body; a heating groove is formed on the inner wall of the water inlet, and a heating element is disposed in the heating groove; a sealing ring is disposed inside the water inlet and contacts the heating element; the sealing ring is heated by the heating element; a cover plate for sealing the water inlet is rotatably connected to the bottom of the cylindrical body; in the closed state, the cover plate contacts the sealing ring; the piston assembly includes: a piston rod and a piston rod. A connecting part is provided at one end of the piston rod, and the piston rod passes through the fixed frame at the top of the cylinder; a plug is provided on the connecting part; wherein, the piston rod is a hollow structure, and the cavity inside the connecting part communicates with the piston rod; several spray holes are provided on the plug; a first fixed part is provided on the outer wall of the cylinder, and a second fixed part is provided on the connecting part; one end of the elastic body is provided on the first fixed part, and the other end passes through the fixed frame and is connected to the second fixed part; a limiting component for limiting the piston rod is provided on the fixed frame and connected to the detection device provided on the outer surface of the cylinder.

[0006] As a further technical solution, the fixing frame includes: a fixing ring sleeved on the top of the cylinder; several support arms, one end of which is set on the fixing ring and the other end of which is connected to the central ring; a piston rod passing through the central ring; and a limiting component set on the support arms.

[0007] Preferably, there are no fewer than three support arms.

[0008] As a further technical solution, the heating element includes: a heating tube disposed in the heating tank, and thermally conductive silicone is disposed between the heating tube and the sealing ring; and a heating medium disposed in the heating tube.

[0009] Preferably, the heating element and the heating bath are interference-fitted.

[0010] As a further technical solution, the nozzles include several straight holes and several oblique holes.

[0011] As a further technical solution, a one-way valve is installed inside the piston rod.

[0012] Preferably, the outer wall of the cylinder is provided with at least two first fixing parts; the connecting part is provided with at least two second fixing parts.

[0013] As a further technical solution, the limiting component includes: a limiting arm, rotatably mounted on a fixed frame; and a first connecting block at one end of the limiting arm; the first connecting block is adapted to a second connecting block mounted on the fixed frame; and a limiting body, mounted inside the fixed frame; during use, the limiting body engages with a fixing groove on the piston rod under the push of the limiting arm.

[0014] As a further technical solution, the limiting body includes: a limiting platform, which is set inside the fixed frame; a limiting post, which passes through the limiting platform; and a limiting plate is provided on the limiting post;

[0015] The elastic element is sleeved on the limiting post and is located between the limiting plate and the inner wall of the limiting platform.

[0016] The technical solution of this utility model involves creating a heating groove on the inner wall of the inlet and embedding a heating element therein, ensuring direct contact between the sealing ring and the heating element. In low-temperature environments, the heating element precisely heats the sealing ring, maintaining its temperature within the elastic adaptation range of nitrile rubber, preventing molecular chain hardening, and ensuring the sealing ring always possesses good elasticity and sealing performance. On one hand, before sampling, it effectively prevents high-level water from seeping into the extraction chamber through the inlet, preventing interference with the original sampling environment and avoiding deviations in sampling results due to "external water contamination." On the other hand, after sampling, it reliably seals the inlet, preventing water sample leakage from the extraction chamber, reducing water sample loss, and ensuring the quantity and original state of the water sample required for subsequent testing, providing a fundamental guarantee for accurate testing. Furthermore, the technical solution of this utility model is stably adaptable to field sampling scenarios in cold regions such as winter and high altitudes, overcoming the low-temperature usage limitations of existing equipment and improving environmental adaptability.

[0017] Furthermore, the technical solution of this utility model utilizes a synergistic structure of a hollow piston rod, a connecting cavity, and nozzles on the plug: the piston rod is hollow and communicates with the cavity within the connecting part, while several nozzles on the plug can directionally eject water from the cavity. After sampling, a water source can be connected to the hollow piston rod, and the water flows through the piston rod and the connecting cavity before being sprayed from the nozzles onto key areas such as the inner wall of the extraction chamber, the surface of the plug, and the inner side of the inlet. Compared to existing technologies, the technical solution of this utility model can effectively remove residual water from the extraction chamber and the plug, avoiding cross-contamination between residual water from previous sampling and newly collected water samples, thereby ensuring the authenticity and accuracy of the test results. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a perspective view of a water sample collection device for water ecological survey according to this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of a water sample collection device for water ecological survey according to this utility model from one angle;

[0021] Figure 3 This is a schematic diagram of the water sample collection device for water ecological survey of this utility model from another angle;

[0022] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0023] Figure 5 for Figure 4 Enlarged structural diagram of section X in the middle;

[0024] Figure 6 for Figure 3 Cross-sectional view along the BB direction;

[0025] Figure 7 for Figure 6 A magnified schematic diagram of the structure of the Y-section.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100-Cylinder body; 101-Fixing frame; 112-Fixing ring; 111-Support arm; 102-First fixing part; 200-Piston assembly; 201-Piston rod; 202-Connecting part; 203-Plug body; 204-Spray hole; 241-Straight hole; 242-Angled hole; 205-Second fixing part; 206-One-way valve; 301-Water inlet; 302-Heating tank; 303-Heating element; 33 1-Heating tube; 332-Heating medium; 304-Sealing ring; 400-Cover plate; 500-Limiting assembly; 501-Limiting arm; 502-Limiting body; 521-Limiting platform; 522-Limiting post; 523-Limiting plate; 524-Elastic element; 503-First connecting block; 504-Second connecting block; 505-Supporting plate; 600-Lifting ring; 700-Detection device; 800-Elastic element. Detailed Implementation

[0028] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] like Figure 1-7 As shown, the present invention proposes a water sample collection device for water ecological surveys, comprising:

[0032] The cylinder 100 and piston assembly 200 are provided. An extraction chamber is formed inside the cylinder 100, and the piston assembly 200 is inserted into the extraction chamber. In this utility model, the cylinder 100 is made of transparent material, so that the water sample inside the cylinder 100 can be clearly seen after the water sample is collected. Preferably, the cylinder 100 is made of tempered glass.

[0033] A water inlet 301 is located at the bottom of the cylinder 100, and a heating groove 302 is formed on the inner wall of the water inlet 301. A heating element 303 is installed in the heating groove 302. A sealing ring 304 is disposed in the water inlet 301 and contacts the heating element 303. The sealing ring 304 is heated by the heating element 303 at low temperatures. A cover plate 400 is rotatably connected to the bottom of the cylinder 100. Specifically, the cover plate 400 can be an arc shape and is rotatably connected to the bottom of the cylinder 100 via a rotating shaft. Of course, the cover plate 400 can also be a flexible plate, with one end fixed or fixedly connected to the bottom of the cylinder 100; in the closed state, the cover plate 400 contacts the sealing ring 304 to block the water inlet 301; when the cylinder 100 is placed in water at a low temperature for collection, the heating element 303 generates heat and transfers it to the sealing ring 304 to prevent the sealing ring 304 from hardening in the low temperature environment, ensuring that it fits the cover plate 400 and further ensuring the sealing of the water inlet 301;

[0034] The piston assembly 200 includes a piston rod 201 and a connecting portion 202 disposed at one end of the piston rod 201. The piston rod 201 passes through a fixing frame 101 at the top of the cylinder 100. A plug 203 is disposed on the connecting portion 202. The piston rod 201 has a hollow structure, and the cavity inside the connecting portion 202 communicates with the piston rod 201. A plurality of spray holes 204 are disposed on the plug 203. A first fixing portion 102 is disposed on the outer wall of the cylinder 100, and a second fixing portion 205 is disposed on the connecting portion 202. One end of the elastomer 800 is disposed on the first fixing part 102, and the other end passes through the fixing frame 101 and is connected to the second fixing part 205; the limiting component 500 is disposed on the fixing frame 101 and is connected to the detection device 700 disposed on the outer surface of the cylinder 100, and the piston rod 201 is limited by the limiting component 500; in this utility model, not less than two first fixing parts 102 are provided on the outer wall of the cylinder 100; not less than two second fixing parts 205 are provided on the connecting part 202; as Figure 1 Preferably, three first fixing parts 102 and three second fixing parts 205 are provided, and three elastic bodies 800 are provided between the three first fixing parts 102 and the three second fixing parts 205. In this way, during use, the three elastic bodies 800 cooperate to connect and pull the connecting part 202, so that the plug 203 can move in the extraction cavity. Preferably, the elastic body 800 is a rubber band, but the elastic body 800 can also be a spring or other elastic body.

[0035] Before use, the piston assembly 200 is pressed down so that the connecting part 202 and the plug 203 contact the bottom of the cylinder 100, expelling the air inside the cylinder 100. During the pressing process, the connecting part 202 pulls the elastic body 800, keeping it in a stretched state. When the cylinder 100 enters the water, water enters the upper part of the cylinder 100 above the connecting part 202. Under the weight of the water and the cylinder 100 itself, the cylinder 100 will continue to fall. During the unloading process, the detection device 700 detects the falling distance of the cylinder 100. When the set distance is reached, the detection device 700 generates two signals: stop and sampling. The stop signal is transmitted through a wire to an external lifting motor, stopping the lowering of the traction rope and placing the cylinder 100 in the set position. The sampling signal is transmitted through a wire to the limiting assembly 500, which then moves... After the piston rod 201 is released from its limit, the connecting part 202 pushes the piston rod 201 to move on the fixed frame 101 under the action of the elastic body 800, and drives the plug 203 to move inside the cylinder 100 through the connecting part 202. During the operation, on the one hand, the water in the upper part of the cylinder 100 above the connecting part 202 is discharged, and on the other hand, the plug 203 separates from the cover plate 400. Under the action of negative pressure, the cover plate 400 opens and no longer seals the inlet 301. At the same time, water is sucked into the extraction chamber through the inlet 301 through the plug 203. When the connecting part 202 contacts the fixed frame 101, the operation stops. The water pressure outside the inlet 301 is greater than the reverse force inside the extraction chamber. Then the water pressure pushes the cover plate 400 to rotate around the connecting shaft at the bottom of the cylinder 100. Under the action of the gravity of the water in the extraction chamber, the cover plate 400 closes and contacts the sealing ring 304 to seal the inlet 301.

[0036] It should be noted that a drain outlet is provided on the cylinder 100, and a drain pipe can be connected to the drain outlet to drain the water sample inside the cylinder 100 after collection. During collection, the drain pipe can be bent and fixed to the cylinder 100 (e.g., using a wide cable tie) to prevent water leakage from the drain outlet after collection. In addition, the detection device 700 is preferably an immersion-type liquid level sensor, which is connected to the limiting component 500 and the external lifting motor via wires. Of course, a temperature sensor can also be fixed at the location of the detection device 700 as needed to detect water level. The water temperature at the set location is transmitted to the outside via a wire, and the specific temperature is subject to the actual situation. This utility model does not limit the specific temperature. Furthermore, a pull hole is provided at the top of the piston rod 201, and a lifting ring 600 is installed in the pull hole. The traction rope is connected to the lifting ring 600, which can raise and lower the cylinder 100 in the water under the drive of an external lifting motor. At the same time, the wire connecting the detection device 700 is fixed to the traction rope with a wide cable tie, so that the wire can move simultaneously when the traction rope moves, thus avoiding the signal transmission being affected by the wire floating in the water.

[0037] The technical solution of this utility model involves creating a heating groove 302 on the inner wall of the inlet 301 and embedding a heating element 303 therein, allowing the sealing ring 304 to directly contact the heating element 303. In low-temperature environments, the heating element 303 can precisely heat the sealing ring 304, maintaining its temperature within the elastic adaptation range of nitrile rubber, preventing molecular chain hardening, and ensuring that the sealing ring 304 always possesses good elasticity and sealing performance. On the one hand, before sampling, it can effectively prevent high-level water from seeping into the extraction chamber through the inlet 301, preventing interference with the original sampling environment and avoiding deviations in sampling results due to "external water mixing." On the other hand, after sampling, it can reliably seal the inlet 301, preventing water sample leakage from the extraction chamber, reducing water sample loss, and ensuring the quantity and original state of the water sample required for subsequent testing, providing a basic guarantee for accurate testing. Simultaneously, the technical solution of this utility model can stably adapt to field sampling scenarios in cold regions such as winter and high altitudes, breaking through the low-temperature usage limitations of existing equipment and improving environmental adaptability.

[0038] Furthermore, the technical solution of this utility model utilizes a collaborative structure of a hollow piston rod 201, a cavity in the connecting part 202, and nozzles 204 in the plug body 203: the piston rod 201 is hollow and communicates with the cavity in the connecting part 202; several nozzles 204 on the plug body 203 can directionally spray water from the cavity. After sampling, a water source can be connected to the hollow piston rod 201, and the water flows through the piston rod 201 and the cavity in the connecting part 202 before being sprayed from the nozzles 204 in the plug body 203 onto key areas such as the inner wall of the extraction chamber, the surface of the plug body 203, and the inner side of the inlet 301. Compared with the prior art, the technical solution of this utility model can remove residual water from the extraction chamber and the plug body 203, avoiding cross-contamination between residual water from the previous sampling and newly collected water samples, thereby ensuring the authenticity and accuracy of the test results.

[0039] like Figure 1As shown, the fixing frame 101 includes several support arms 111 and a fixing ring 112. The fixing ring 112 is sleeved on the top of the cylinder 100. One end of each of the support arms 111 is set on the fixing ring 112, and the other end is connected to the central ring. The piston rod 201 passes through the central ring. The limiting component 500 is set on the support arm 111. Specifically, the fixing ring 112 can be fixed to the cylinder 100 by means of threads or adhesive to ensure that the fixing ring 112 will not be displaced after being installed in the cylinder 100, and can be disassembled when necessary for maintenance or repair. In addition, the fixing ring 112 and the support arms 111 are preferably made of stainless steel and are made of stainless steel. The support arm 111 is welded to the fixing ring 112 to ensure that the fixing ring 112 and the support arm 111 are not easily separated during use. During use, the piston rod 201 passes through the central ring, and the stability of the piston rod 201 movement is ensured by the cooperation of the fixing ring 112 and several support arms 111. To ensure the stability of the piston rod 201, it is preferable that there are no fewer than three support arms 111. In this utility model, three support arms 111 are provided. The limiting component 500 is provided on one of the three support arms 111. When the piston rod 201 is pressed down, the position of the piston rod 201 is limited by the limiting component 500 to prevent the piston rod 201 from moving.

[0040] In this invention, since the support arm 111 is a hollow structure, the elastic body 800 enters from one end of the support arm 111, and exits through the through hole on the support arm 111 opposite to the second fixing part 205 before connecting with the second fixing part 205. Of course, in order to reduce the wear between the elastic body 800 and the through hole, it is preferable to also provide a guide structure, such as a guide groove or a guide wheel, in the support arm 111 corresponding to the through hole. The guide structure is preferably a guide wheel, which changes the direction of the elastic body 800 and reduces the contact area between the elastic body and the support arm 111, thereby reducing the wear of the elastic body.

[0041] like Figure 4 and Figure 5 The heating element 303 shown includes a heating tube 331 and a heating medium 332. The heating tube 331 is disposed in the heating tank 302. Thermally conductive silicone is disposed between the heating tube 331 and the sealing ring 304. The heating medium 332 is disposed in the heating tube 331. The heating tube 331 and the heating tank 302 are interference-fitted to ensure that the heating tube 331 is not easily separated from the heating tank 302 after it is fixed. In use, when the ambient temperature is low, the heating medium 332 generates heat and transfers it to the sealing ring 304 to prevent the sealing ring 304 from hardening and to ensure the sealing of the water inlet 301.

[0042] In this invention, the heating tube 331 is a stainless steel tube, and the heating medium 332 is preferably a wax core made of decanoic acid-lauric acid composite phase change material. The key performance parameters of this material are as follows: phase change temperature range -3℃ to 0℃, latent heat of phase change ≥200J / g; when the ambient temperature drops below 0℃, the decanoic acid-lauric acid composite phase change material encapsulated in the heating tube 331 undergoes a solid phase change, and the released latent heat of phase change is transferred to the surface of the sealing ring 304 through the thermally conductive silicone, so that the temperature of the sealing contact surface is maintained at 2℃~5℃; the rigid support of the stainless steel tube prevents the sealing deformation caused by the volume change of the phase change material.

[0043] like Figure 5 As shown, the nozzles 204 include several straight holes 241 and several oblique holes 242, and both the straight holes 241 and the oblique holes 242 are connected to the cavity inside the connecting part 202. After the water sample is collected, the water pipe is connected to the piston rod 201, and clean water is transported from the piston rod 201 to the cavity of the connecting part 202 through the water pipe. The water is then discharged into the extraction chamber through the straight holes 241 and the oblique holes 242 to clean the extraction chamber. The cleaned water can be discharged through the drain outlet to ensure that there is no water sample residue in the extraction chamber after sampling, thus avoiding affecting the sampling results in the next use. It should be noted that... An internal thread can be provided at the top of the piston rod 201, and the piston rod 201 can be fixed by means of a rubber cap and a threaded connection, so as to prevent gas from entering the piston rod 201 during water sample collection. Of course, in this utility model, it is preferable to provide a one-way valve 206 inside the piston rod 201. When the water pipe is connected, under the action of water pressure, water can pass through the one-way valve 206 and enter the cavity of the connection part 202. When water sample collection is performed, the one-way valve 206 is in the closed state, and the air in the extraction chamber cannot pass through the one-way valve 206, thereby ensuring that the extraction chamber is in a negative pressure state when the plug 203 is activated.

[0044] like Figure 6 and Figure 7As shown, the limiting assembly 500 includes a limiting arm 501 and a limiting body 502; the limiting arm 501 is rotatably mounted on the fixed frame 101; and a first connecting block 503 is provided at one end of the limiting arm 501, which is adapted to a second connecting block 504 provided on the fixed frame 101; the limiting body 502 is disposed inside the fixed frame 101; during use, the limiting body 502 engages with the fixing groove on the piston rod 201 under the push of the limiting arm 501; specifically, the support arm 111 has a hollow structure; the limiting arm 501 passes through the support arm 111; and a support plate 505 is provided inside the support arm 111, the limiting arm 501 and the support plate 505 are connected by... The pivot pin is connected, and there can be two support plates 505 to support both ends of the pivot, so that the limiting arm 501 can rotate. When the piston rod 201 is pressed down, the limiting arm 501 is manually pressed down so that the limiting arm 501 contacts the limiting body 502, and the limiting body 502 is inserted into the fixing groove on the piston rod 201 to limit the position of the piston rod 201. After the limiting arm 501 is pressed down, the first connecting block 503 and the second connecting block 504 contact each other. Since the second connecting block 504 is fixed on the support arm 111, the position of the first connecting block 503 is limited under the action of the second connecting block 504, so that the limiting body 502 is kept inserted into the fixing groove.

[0045] In this invention, the preferred first connecting block 503 is a magnet, and the second connecting block 504 is an electromagnet; the second connecting block 504 is connected to the detection device 700; the second connecting block 504 can be connected to an external power source via a wire, or it can be connected to the built-in power source of the detection device 700 via a wire; after the piston rod 201 is compressed, the second connecting block 504 is energized by the external power source or the detection device 700 to generate magnetic force. After the limiting arm 501 is pressed down, the second connecting block 504 attracts the first connecting block 503, thereby causing the limiting body 502 to be inserted into the fixing groove; when the set position is reached, the detection device 700 generates a sampling signal and transmits it to the second connecting block 504, the second connecting block 504 is de-energized, the attraction force on the first connecting block 503 disappears, and the limiting arm 501 is reset under the push of the limiting body 502; the piston rod 201 moves under the drive of the elastic body 800, thereby drawing water into the extraction chamber. It should be noted that a circuit board is provided between the second connecting block 504 and the detection device 700. This circuit board can be a switching circuit in the prior art, used to control the conduction between the second connecting block 504 and the power supply. Since the prior art is used, this utility model will not be described further. However, it is necessary to use sealant or other methods to seal the circuit board inside the support arm 111 to avoid short circuits caused by contact with water.

[0046] like Figure 7As shown, the limiting body 502 includes a limiting platform 521, a limiting post 522, and an elastic element 524; the limiting platform 521 is disposed within the fixed frame 101; the limiting post 522 passes through the limiting platform 521, and a limiting plate 523 is disposed on the limiting post 522; the elastic element 524 is sleeved on the limiting post 522 and is positioned between the limiting plate 523 and the inner wall of the limiting platform 521; when the limiting arm 501 is pressed down, one end of the limiting arm 501 contacts one end of the limiting post 522, and pushes the limiting post 522 to move on the limiting platform 521, and after the movement... The other end of the limiting post 522 is inserted into the fixing groove; due to the presence of the limiting plate 523, the elastic element 524 is squeezed during the movement of the limiting post 522; when the first connecting block 503 and the second connecting block 504 separate, the force applied to one end of the limiting post 522 disappears, and when the elastic element 524 resets, it pushes the limiting plate 523 to move, and drives the limiting post 522 to move in the opposite direction, so that the limiting post 522 separates from the fixing groove; water sample is extracted under the action of the elastic body 800; in this utility model, the elastic element 524 is preferably a spring.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A water sampling device for aquatic ecological survey, characterized by comprising: The utility model relates to a kind of water heating device, including: Cylinder (100) and piston assembly (200), the inside of the cylinder (100) forms extraction cavity, the piston assembly (200) is arranged in the extraction cavity; Water inlet (301) is opened in the bottom of the cylinder (100);And heating groove (302) is opened on the inner wall of the water inlet (301), heating body (303) is arranged in the heating groove (302);Sealing ring (304) is arranged in the water inlet (301), and is in contact with heating body (303);The sealing ring (304) is heated by heating body (303); Cover plate (400) for plugging the water inlet (301) is rotatably connected with the bottom of the cylinder (100); In closed state, the cover plate (400) is in contact with the sealing ring (304); The piston assembly (200) includes: piston rod (201) and the connecting portion (202) arranged at one end of the piston rod (201), the piston rod (201) is arranged on the fixed frame (101) of the top of the cylinder (100);The connecting portion (202) is provided with plug body (203);Wherein, the piston rod (201) is hollow structure, the cavity in the connecting portion (202) is communicated with the piston rod (201);Plug body (203) is provided with several injection holes (204); The outer wall of the cylinder (100) is provided with first fixed part (102), and the second fixed part (205) is arranged on the connecting portion (202);One end of elastomer (800) is arranged on the first fixed part (102), and the other end is connected with the second fixed part (205) after passing through fixed frame (101); Limiting assembly (500) for limiting the piston rod (201) is arranged on the fixed frame (101), and is connected with the detection device (700) arranged on the outer surface of the cylinder (100).

2. The water sampling device for water ecological survey according to claim 1, characterized by The fixed frame (101) includes: Fixed ring (112) is sleeved on the top of the cylinder (100); Several support arms (111) are arranged on the fixed ring (112), and the other ends are connected with the center ring;The piston rod (201) is arranged on the center ring; The limiting assembly (500) is arranged on the support arm (111).

3. The water sampling device for water ecological survey according to claim 2, characterized by The support arm (111) is not less than three.

4. The water sampling device for water ecological survey according to claim 1, characterized by The heating body (303) includes: Heating pipe (331) is arranged in the heating groove (302), and heat-conducting silica gel is arranged between the heating pipe (331) and the sealing ring (304); Heating medium (332) is arranged in the heating pipe (331).

5. The water sampling device for water ecological survey according to claim 4, characterized in that, The heating pipe (331) is interference fit with the heating groove (302).

6. The water sampling device for water ecological survey according to claim 1, characterized by Several injection holes (204) include several straight holes (241) and several inclined holes (242).

7. The water sampling device for water ecological survey according to claim 1, characterized by The piston rod (201) is provided with a one-way valve (206).

8. The water sampling device for water ecological survey according to claim 1, characterized in that, The outer wall of the cylinder (100) is provided with not less than two first fixed parts (102);The second fixed part (205) is arranged on the connecting portion (202) not less than two.

9. The water sampling device for water ecological survey according to claim 1, characterized by The limiting assembly (500) comprises: A limiting arm (501) rotatably arranged on the fixing frame (101); one end of the limiting arm (501) is provided with a first connecting block (503); the first connecting block (503) is matched with a second connecting block (504) arranged on the fixing frame (101); A limiting body (502) arranged in the fixing frame (101); in the use stage, the limiting body (502) is clamped with a fixing groove on the piston rod (201) under the pushing of the limiting arm (501).

10. The water sampling device for water ecological survey according to claim 9, characterized in that, The limiting body (502) comprises: A limiting table (521) arranged in the fixing frame (101); A limiting column (522) penetratingly arranged in the limiting table (521), and a limiting plate (523) arranged on the limiting column (522); An elastic member (524) sleeved on the limiting column (522) and arranged between the limiting plate (523) and the inner wall of the limiting table (521).

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