Deep water sampling device and method thereof

Abstract

The invention belongs to the technical field of water environment monitoring, and relates to a deep water sampling device and method, and the device comprises a bottle body, a piston piece, a linear reciprocating motion assembly, and at least three pressure regulating valves. The piston piece is arranged in the bottle body, the power output end of the linear reciprocating motion assembly is connected with the piston piece, and at least three openings are formed in the circumferential direction of the bottle body. The pressure regulating valves are respectively arranged in the corresponding openings, each pressure regulating valve is provided with a pressure bearing part and a flow regulating part, the pressure bearing part is connected with the corresponding flow regulating part, the pressure bearing part is used for bearing water pressure around the bottle body, the flow regulating parts are arranged in the openings, and the flow regulating parts are used for regulating the sizes of the openings. When the bottle body is lowered, the linear reciprocating motion assembly drives the piston piece to move upwards, water enters the opening from the opening, and when the water pressure borne by the pressure bearing part is increased, the flow adjusting part adjusts the corresponding opening to be enlarged, so that the pressure borne by the periphery of the bottle body is balanced, and the inclination degree of the bottle body is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of water environment monitoring, and in particular relates to a deep water sampling device and a method thereof. Background Art

[0002] Water conservancy projects are mainly aimed at controlling and utilizing water resources to meet the needs of human life, production and development. Through the investigation, evaluation, planning and management of water resources, water resources are rationally allocated and utilized. In the process of regional water resource management and water conservancy project construction management and service, it is necessary to monitor the water environment. Water environment monitoring is to measure representative indicators that may affect the quality of the water environment through appropriate methods, so as to determine the water quality status and its changing trend of the water body. In actual work, the actual situation of the water body should be fully considered, appropriate sampling points should be selected, sufficient sampling volume should be ensured, sampling frequency and time should be reasonably arranged, and attention should be paid to avoiding human pollution and properly preserving samples.

[0003] The sampling points for water environment monitoring are generally selected in areas far away from pollution sources, such as lakes, downstream of rivers or natural water bodies such as reservoirs. For the same water area, water samples of different water depths should be selected to reflect the water quality of the entire water body.

[0004] When sampling deep water, a long hose is usually connected to the sampling bottle. When sampling, the sampling bottle is lowered from the water surface into the water body, and the hose is continuously lengthened. The depth of the sampling bottle is judged according to the length of the lowered hose until the sampling bottle reaches the set depth. However, there is generally water flow in natural water bodies. When the water flows, it will impact the sampling bottle, causing the sampling bottle and the hose to deviate, thereby causing the sampling bottle to deviate from the sampling position, and the depth reached will deviate from the set depth, affecting the accuracy of the sampling data. Summary of the invention

[0005] In view of this, the present invention provides a deep water sampling device and method thereof, which can reduce the degree of deflection of the sampling bottle and the hose and reduce the deviation of the sampling position of the sampling bottle.

[0006] The technical solution of the present invention is:

[0007] A deep water sampling device comprises a bottle body, the bottle body has a central axis, the top of the bottle body has a water inlet and a water outlet, the circumference of the bottle body is provided with at least three openings, and further comprises:

[0008] A piston member, disposed inside the bottle body and slidably connected to the bottle body;

[0009] A linear reciprocating motion assembly, whose power output end is connected to the piston member and is used to drive the piston member to move along the direction of the central axis;

[0010] At least three pressure regulating valves are respectively arranged in corresponding openings, each of the pressure regulating valves has a pressure-bearing part and a flow regulating part, the pressure-bearing part is connected to a corresponding flow regulating part, the pressure-bearing part is used to withstand the water pressure on the peripheral surface of the bottle body, the flow regulating part is arranged in the opening, and the flow regulating part is used to adjust the size of the opening;

[0011] When the bottle body is lowered, the linear reciprocating motion assembly drives the piston to move upward, and when the water pressure on the pressure-bearing part increases, the flow regulating part adjusts the corresponding opening to increase.

[0012] Further, the pressure regulating valve includes a valve seat, a first stopper, a second stopper, and a first elastic member, the valve seat is an annular member, both ends of the annular member are arranged as conical surfaces flaring outward, the first stopper is a pressure-bearing part, the first stopper is arranged at the first end of the annular member, the side surface of the first stopper cooperates with the conical surface of the first end of the annular member, a first through hole is opened on the first stopper, a first one-way valve is arranged at the first through hole, the second stopper is a flow regulating part, the second stopper is symmetrically arranged with the first stopper, a first elastic member is connected between the first stopper and the second stopper, and the first elastic member is used to pull the first stopper and the second stopper to closely cooperate with the corresponding conical surfaces.

[0013] Furthermore, a accommodating cavity is provided inside the first stopper, the first through hole passes through the accommodating cavity, the first one-way valve includes a baffle and a second elastic member, the baffle and the second elastic member are both arranged in the accommodating cavity, one end of the second elastic member is connected to the baffle, and the other end is connected to the inner wall of the accommodating cavity, the second elastic member is used to push the baffle to block the through hole, and the second elastic member is arranged on a side of the first stopper close to the first elastic member.

[0014] Furthermore, the second stopper has the same structure as the first stopper, and the second one-way valve has the same structure as the first one-way valve but in opposite directions.

[0015] Furthermore, a push plate is provided on the outer side of the first stopper, a hole communicating with the first through hole is provided on the push plate, a gap is left between the push plate and the first stopper, a guide groove is provided on the first stopper, a push rod is slidably provided in the guide groove, one end of the push rod is fixedly connected to the push plate, and the other end contacts the first stopper.

[0016] Furthermore, a drain outlet is arranged at the center position of the top of the bottle body, a third one-way valve is arranged at the drain outlet, a plurality of water inlets are arranged at the top of the bottle body, the plurality of water inlets are evenly arranged around the central axis, and a fourth one-way valve is arranged at each of the water inlets.

[0017] Furthermore, the reciprocating linear motion assembly includes a stepper motor, which is arranged at the bottom center position of the bottle body. The output end of the stepper motor is connected to a screw rod, the center line of the screw rod coincides with the central axis, the screw rod is threadedly connected to the piston member, and a limiting structure is arranged between the piston member and the bottle body.

[0018] Furthermore, the limiting structure includes a limiting rod, the limiting rod is parallel to the central axis, the limiting rod is fixedly connected to the inner wall of the bottle body, and a limiting groove is provided on the piston member, and the limiting groove is slidably connected to the limiting rod.

[0019] Furthermore, a counterweight is connected to the bottom of the bottle body, the counterweight is configured to be conical, with the tip of the cone facing downward, a receiving groove is provided inside the counterweight, and the stepper motor is provided inside the receiving groove.

[0020] The present invention also provides a deep water sampling method, which comprises the following steps:

[0021] The bottle body is lowered, and the linear reciprocating motion assembly drives the piston member to move upward, and water enters the bottle body from the opening, causing the bottle body to move downward;

[0022] Collect water samples, the linear reciprocating motion assembly drives the piston to move downward, and the water sample enters the bottle body from the water inlet;

[0023] The water sample is drawn out, and the linear reciprocating motion assembly drives the piston to move upward, and the water sample is drawn out from the drain port.

[0024] Compared with the prior art, the deep water sampling device and method provided by the present invention have the following beneficial effects:

[0025] The present invention arranges an opening in the circumferential direction of the bottle body, and arranges a pressure regulating valve at the opening, wherein the pressure regulating valve comprises a pressure-bearing part and a flow regulating part. When the pressure of the pressure-bearing part caused by the impact of the water flow increases, the flow regulating part can be adjusted to enlarge the opening, thereby increasing the water intake of the opening on the water-facing side, reducing the water pressure on the water-facing surface, thereby balancing the water pressure around the bottle body, reducing the degree of inclination of the bottle body, reducing the position deviation and depth deviation of the sampling bottle, and thus improving the accuracy of the sampling data. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the external structure of the present invention.

[0027] Figure 2 It is a cross-sectional view of the present invention.

[0028] Figure 3 This is a schematic diagram of the structure of the pressure regulating valve according to Example 1 of the present invention.

[0029] Figure 4This is a schematic diagram of the structure of the pressure regulating valve according to Example 2 of the present invention.

[0030] Figure 5 This is a diagram showing the connection relationship between the push plate and the push rod in Example 2 of the present invention.

[0031] Figure 6 It is a path diagram of water entering from the opening of the present invention.

[0032] Figure 7 It is a path diagram of water discharge from the opening according to the present invention.

[0033] Description of reference numerals:

[0034] 1. Bottle body, 2. Water inlet, 201. Fourth one-way valve, 3. Drain outlet, 301. Third one-way valve, 4. Opening, 5. Counterweight, 6. Piston, 7. Linear reciprocating motion assembly, 701. Screw, 702. Limit rod, 703. Stepper motor, 8. Pressure regulating valve, 801. Valve seat, 802. First stop block, 803. Second stop block, 804. First elastic member, 805. Baffle, 806. Second elastic member, 807. Push plate, 808. Push rod. DETAILED DESCRIPTION

[0035] It should be noted that, in the description of the present invention, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0037] In addition, it should be noted that the connections involved in the present invention can be achieved by using conventional connection methods and do not involve any innovation.

[0038] The subject of the present invention is a deep water sampling device and method thereof. Water environment monitoring is to determine the water quality status and its changing trend of the water body by measuring the representative indicators that may affect the water environment quality through appropriate methods. In practical work, the actual situation of the water body should be fully considered, appropriate sampling points should be selected, sufficient sampling volume should be ensured, sampling frequency and time should be reasonably arranged, and attention should be paid to avoiding human pollution and properly preserving samples. For the same water area, water samples of different water depths should be selected to reflect the water quality of the entire water body. The sampling points for water environment monitoring are generally selected in areas far away from pollution sources, such as lakes, downstream of rivers or natural water bodies such as reservoirs.

[0039] When sampling deep water, a long hose is generally connected to the sampling bottle. When sampling, the hose is lowered from the water surface to allow the sampling bottle to penetrate to the set depth. The depth of the sampling bottle is determined based on the length of the lowered hose. However, there is generally water flow in natural water bodies. When the water flows, the water pressure on the side of the sampling bottle facing the water is greater, while the water pressure on the side facing away from the water is smaller. The water flow will impact the sampling bottle, causing it to deflect, thereby preventing the sampling bottle from reaching the set depth, affecting the accuracy of the sampling data.

[0040] Based on the above reasons, the present invention provides a deep water sampling device and method to solve the above-mentioned technical problems. Figures 1 to 7 , the present invention is described in detail.

[0041] Example 1

[0042] This embodiment provides a deep water sampling device, such as Figure 1 and Figure 2 As shown, it includes a bottle body 1, a piston member 6, a linear reciprocating motion component 7, and at least three pressure regulating valves 8.

[0043] The bottle body 1 has a central axis, and the top of the bottle body 1 has a water inlet 2 and a water outlet 3, and the bottom of the bottle body 1 is circumferentially provided with at least three openings 4. The piston member 6 is arranged inside the bottle body 1 and is slidably connected to the bottle body 1. The power output end of the linear reciprocating motion component 7 is connected to the piston member 6, and is used to drive the piston member 6 to move along the direction of the central axis. At least three pressure regulating valves 8 are respectively arranged in the corresponding openings 4, and each pressure regulating valve 8 has a pressure-bearing part and a flow regulating part. The pressure-bearing part is connected to a corresponding flow regulating part, and the pressure-bearing part is used to withstand the water pressure on the outer peripheral surface of the bottle body 1. The flow regulating part is arranged in the opening 4, and the flow regulating part is used to adjust the size of the opening 4.

[0044] When in use, the linear reciprocating motion assembly 7 drives the piston 6 to move upward when the bottle body 1 is lowered, and water enters the bottle body 1 from the opening 4. When the water pressure on the pressure-bearing part increases, the flow regulating part adjusts the corresponding opening 4 to increase, thereby reducing the water pressure on the corresponding side of the bottle body 1, thereby balancing the pressure around the bottle body 1 and reducing the tilt of the bottle body 1.

[0045] In this embodiment, the linear reciprocating motion component 7 can select one of the crank slider mechanism, hydraulic cylinder, pneumatic cylinder or screw nut mechanism. It should be noted that the driving components of the linear reciprocating motion component 7 are all arranged in the middle position of the bottom of the bottle body 1, mainly to ensure the balance of the bottle body 1.

[0046] The pressure-bearing part may select a pressure sensor, and the flow regulating part may select an electromagnetic valve. The pressure sensor is arranged on the outer peripheral surface of the bottle body 1, and the pressure sensor is electrically connected to the electromagnetic valve. When the pressure detected by the pressure sensor increases, the electromagnetic valve increases the flow of the opening 4.

[0047] A power module is arranged at the bottom of the bottle body 1 to provide electric energy for the driving components of the pressure sensor, the solenoid valve or the linear reciprocating motion assembly 7 .

[0048] In this embodiment, the pressure regulating valve 8 includes a valve seat 801, a first stopper 802, a second stopper 803, and a first elastic member 804. The first elastic member 804 can be a spring. The valve seat 801 is an annular member. Both ends of the annular member are arranged as conical surfaces expanding outward. The first stopper 802 is a pressure-bearing portion. The first stopper 802 is arranged at the first end of the annular member. The side surface of the first stopper 802 cooperates with the conical surface of the first end of the annular member. The first through hole is provided on the first stopper 802. The first one-way valve is provided at the first through hole. The second stopper 803 is a flow The amount adjustment part, the first stop block 802 is arranged at the second end of the annular member, one side of the second stop block 803 cooperates with the corresponding conical surface, a second through hole is opened on the second stop block 803, and a second one-way valve is arranged in the second through hole, and a first elastic member 804 is arranged between the first stop block 802 and the second stop block 803, one end of the first elastic member 804 is fixedly connected to the first stop block 802, and the other end is fixedly connected to the second stop block 803, and the first elastic member 804 is used to pull the first stop block 802 and the second stop block 803 to closely cooperate with the corresponding conical surface.

[0049] The opening direction of the first one-way valve is toward the central axis, and the opening direction of the second one-way valve is away from the central axis.

[0050] The center lines of the plurality of openings 4 are arranged on the same plane perpendicular to the central axis, and the height of the piston member 6 is arranged to be able to block the openings 4, so that when the piston member 6 is located at the bottom, the openings 4 are in a closed state.

[0051] When the piston 6 starts to move upward, the air pressure inside the bottle body 1 decreases, and under the action of the air pressure and the external water pressure, the pressure regulating valve 8 is opened.

[0052] Specifically, the water pressure pushes the first stopper 802 to move inward, and the first stopper 802 is tightly matched with the conical surface and water cannot pass through. At this time, the first one-way valve on the first stopper 802 is opened under the combined action of water pressure and air pressure. After water enters from the first one-way valve, it pushes the second stopper 803 to move toward the central axis and enters the bottle body 1 from the gap between the second stopper 803 and the conical surface. The water flow path is as follows: Figure 5 shown.

[0053] The air pressure inside the bottle body 1 is the same for multiple openings 4. When the water pressure outside the bottle body 1 is different, the side with greater water pressure will push the second stopper 803 toward the central axis for a longer distance, and the gap between the second stopper 803 and the conical surface will be larger, and the water inflow corresponding to this opening 4 will be larger, thereby reducing the impact force of the water flow on this side of the bottle body 1, balancing the water pressure around the bottle body 1, and reducing the tilt of the bottle body 1.

[0054] In this embodiment, a receiving cavity is provided inside the first stopper 802, and the first through hole passes through the receiving cavity. The first one-way valve includes a baffle 805 and a second elastic member 806. The baffle 805 and the second elastic member 806 are both arranged in the receiving cavity. The second elastic member 806 may be a spring. One end of the second elastic member 806 is fixedly connected to the baffle 805, and the other end is fixedly connected to the inner wall of the receiving cavity. The second elastic member 806 is used to push the baffle 805 to block the through hole. The second elastic member 806 is arranged on a side of the first stopper 802 close to the first elastic member 804. The second elastic member 806 may be a spring.

[0055] In this embodiment, the second stopper 803 has the same structure as the first stopper 802 , and the second one-way valve has the same structure as the first one-way valve but in opposite directions.

[0056] On the first stopper 802, water pressure pushes the baffle 805 to move and compress the second elastic member 806. A gap exists between the baffle 805 and the inner wall of the accommodating cavity. Water passes through the accommodating cavity and then through the through hole through the gap, thereby opening the first one-way valve.

[0057] On the second stopper 803, water pressure pushes the baffle 805 to move so that the second elastic member 806 keeps pushing the baffle 805 tightly against the through hole. At this time, the through hole on the second stopper 803 is closed, and water enters the bottle body 1 through the gap between the second stopper 803 and the conical surface.

[0058] The usage and working principle of this embodiment

[0059] In the initial state, the piston 6 is located at the bottom of the bottle 1, and the bottle 1 is filled with air. When the bottle 1 is placed in water, in order to reduce the buoyancy of the bottle 1 and allow the bottle 1 to enter the deep water smoothly, the bottle 1 needs to be filled with water. At this time, the piston 6 is driven upward by the linear reciprocating motion component 7. When the piston 6 moves upward, water enters the bottle 1 from the opening 4. The water flow path is as follows: Figure 6 shown.

[0060] When the bottle body 1 reaches the set depth, the piston 6 is driven downward by the linear reciprocating motion assembly 7, and the water flow path of the opening 4 is as follows: Figure 7 As shown, while the piston 6 moves downward, the sampled water enters the bottle body 1 from the water inlet 2 at the top. After the sampling is completed, the piston 6 moves upward, and the sampled water is discharged from the drain port 3 through the hose.

[0061] In order to prevent the water discharged from the opening 4 from affecting the sampled water entering from the water inlet 2 during sampling, the water inlet 2 is arranged at the top of the bottle body 1, facing upward; the opening 4 is arranged at a place away from the water inlet 2. In this embodiment, the opening 4 is arranged at the bottom of the bottle body 1. Since the opening 4 needs to balance the circumferential pressure of the bottle body 1, the opening direction of the opening 4 is toward the circumference of the bottle body 1.

[0062] During sampling, the piston 6 moves downward to pressurize the water inside the bottle body 1, and the water inside the bottle body 1 simultaneously generates pressure on the second stoppers 803 at the multiple openings 4, such as Figure 7 As shown, the second stopper 803 is tightly matched with the conical surface and does not allow water to pass through. The water pressure pushes the baffle 805 on the second stopper 803 to move and compress the corresponding second elastic member 806. Water flows from the accommodating cavity and the through hole to between the first stopper 802 and the second stopper 803. The first stopper 802 moves away from the valve seat 801 under the push of the water flow, and the gap between the first stopper 802 and the conical surface increases. The baffle 805 inside the first stopper 802 still blocks the through hole under the action of the water pressure, and the water is discharged from the bottle body 1 from the gap between the first stopper 802 and the conical surface. In this process, when the water pressure on one side of the outside of the bottle body 1 increases, the external water pressure applies a force toward the central axis to the first stopper 802, pushing the first stopper 802 to move toward the valve seat 801, thereby reducing the gap between the first stopper 802 and the conical surface, reducing the water output on this side, and reducing the relative force between the internal water and the external water. The amount of water discharged on the side with less impact from the water flow is relatively large. The drainage causes the external water to produce a reaction force on the bottle body 1. This reaction force is opposite to the direction of the water flow, thereby further reducing the degree to which the bottle body 1 deviates due to the impact of the water flow, further reducing the inclination of the bottle body 1 during the sampling process, and avoiding the water flow from impacting the bottle body 1 and deviating it from its original position during the sampling process, thereby maintaining the stability of the sampling bottle during sampling.

[0063] Example 2

[0064] On the basis of Example 1, in order to further improve the sensitivity of the pressure regulating valve 8 when the water pressure outside the bottle body 1 changes, as shown in FIG. Figure 4 and Figure 5 As shown, in this embodiment, a push plate 807 is provided on the outer side of the first stop block 802, and a hole communicating with the first through hole is provided on the push plate 807, a gap is left between the push plate 807 and the first stop block 802, and a guide groove is provided on the first stop block 802, and a push rod 808 is slidably provided in the guide groove, one end of the push rod 808 is fixedly connected to the push plate 807, and the other end is in contact with the first stop block 802.

[0065] In order to prevent the push rod 808 from sliding out of the guide slot, a limit block is provided at one end of the push rod 808 away from the push plate 807, and the size of the limit block can be larger than the cross-sectional size of the guide slot.

[0066] In this embodiment, a drain outlet 3 is arranged at the center position of the top of the bottle body 1, and a third one-way valve 301 is arranged at the drain outlet 3. A plurality of water inlets 2 are arranged at the top of the bottle body 1, and the plurality of water inlets 2 are evenly arranged around the central axis, and a fourth one-way valve 201 is arranged at each water inlet 2.

[0067] The opening direction of the third one-way valve 301 is a direction away from the bottle body 1 , and the opening direction of the fourth one-way valve 201 is a direction toward the inside of the bottle body 1 .

[0068] The usage and working principle of this embodiment

[0069] When the water pressure outside the first stopper 802 increases, the water pressure pushes the push plate 807 to move toward the central axis, and the push plate 807 drives the push rod 808 to move synchronously, and the push rod 808 pushes the second stopper 803 to move, thereby increasing the gap between the second stopper 803 and the conical surface, increasing the water intake of the opening 4, further balancing the water pressure outside the bottle body 1, and reducing the tilt of the bottle body 1.

[0070] When there is no water flow impact at the sampling position, the water pressure on the four sides of the bottle body 1 is the same. At this time, the openings 4 on the four sides of the bottle body 1 are the same size. During the sampling process, the mutual forces of water inflow or outflow from the openings 4 on the four sides of the bottle body 1 are balanced, and the balance of the bottle body 1 can still be maintained.

[0071] Example 3

[0072] On the basis of Example 1 and Implementation 2, the deep water sampling device provided in this embodiment, the reciprocating linear motion component 7 includes a stepper motor 703, the stepper motor 703 is arranged at the bottom center position of the bottle body 1, the output end of the stepper motor 703 is connected to a screw rod 701, the center line of the screw rod 701 coincides with the center axis, the screw rod 701 is threadedly connected to the piston member 6, and a limiting structure is arranged between the piston member 6 and the bottle body 1.

[0073] The stepper motor 703 is connected with a built-in power storage module, and the stepper motor 703 is electrically connected to the controller.

[0074] In this embodiment, the limiting structure includes a limiting rod 702, which is parallel to the central axis and fixedly connected to the inner wall of the bottle body 1. A limiting groove is provided on the piston 6, and the limiting groove is slidably connected to the limiting rod 702.

[0075] In this embodiment, a counterweight 5 is connected to the bottom of the bottle body 1. The counterweight 5 is set to be conical, with the tip of the cone facing downward. A receiving groove is set inside the counterweight 5, and the stepper motor 703 is set inside the receiving groove. The counterweight 5 is sealed and connected to the bottle body 1 to prevent water from entering the receiving groove.

[0076] The usage and working principle of this embodiment

[0077] When in use, the staff operates remotely. When the bottle body 1 begins to enter the water, the stepper motor 703 is controlled to rotate forward, and the screw rod 701 rotates forward to drive the piston member 6 to move upward; when the bottle body 1 reaches the set depth, the stepper motor 703 is controlled to rotate reversely, and the screw rod 701 rotates reversely to drive the piston member 6 to move downward for sampling; after the sampling is completed, the stepper motor 703 is controlled to rotate forward, and the screw rod 701 rotates forward to drive the piston member 6 to move upward, and the sampled water is discharged from the drain port 3.

[0078] Example 4

[0079] Based on the above sampling device, this embodiment provides a deep water sampling method on the basis of Embodiment 1, Embodiment 2 and Embodiment 3. The method comprises the following steps:

[0080] The bottle body 1 is lowered, the stepping motor 703 rotates forward, the screw rod 701 rotates forward to drive the piston 6 to move upward, and water enters the bottle body 1 from the opening 4, so that the bottle body 1 moves downward;

[0081] To collect water samples, the stepper motor 703 is controlled to rotate in the opposite direction, and the screw rod 701 rotates in the opposite direction to drive the piston 6 to move downward for sampling, and the water sample enters the bottle body 1 from the water inlet 2;

[0082] To extract the water sample, the stepper motor 703 rotates forward, the screw rod 701 rotates forward to drive the piston 6 to move upward, and the water sample is extracted from the drain port 3.

[0083] While solving the above technical problems, this embodiment can also meet the requirements of multiple sampling at different water depths. When the water depth is deep, it takes a long time to lower the sampling bottle and lift it up. In this embodiment, it is only necessary to lower the sampling bottle once for multiple sampling. Specifically, when in use, as described above, it is a sampling process. After the sampling water of one sampling is discharged from the drain port 3, the water entering the bottle body 1 from the opening 4 will fill the bottle body 1. At this time, the hose connected to the bottle body 1 is continued to be lowered for secondary sampling. After reaching the depth of the secondary sampling, the piston 6 is continued to be driven downward for sampling. This cycle is repeated until the water samples at multiple depths are collected.

[0084] The present invention arranges an opening in the circumferential direction of the bottle body, and arranges a pressure regulating valve 8 at the opening. The pressure regulating valve 8 includes a pressure-bearing part and a flow regulating part. When the pressure of the pressure-bearing part caused by the impact of water flow increases, the flow regulating part can be adjusted to increase the opening, thereby increasing the water intake of the opening on the corresponding side, reducing the water pressure on the corresponding side, thereby balancing the water pressure around the bottle body, reducing the degree of inclination of the bottle body, and improving the accuracy of water sampling data.

[0085] The above disclosure is only a preferred specific embodiment of the present invention, but the embodiments of the present invention are not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A deep water sampling device, comprising a bottle body (1), wherein the bottle body (1) has a central axis, and the top of the bottle body (1) has a water inlet (2) and a water outlet (3), characterized in that: The bottle body (1) is provided with at least three openings (4) in the circumferential direction, and further comprises: A piston member (6) is arranged inside the bottle body (1) and is slidably connected to the bottle body (1); A linear reciprocating motion assembly (7), whose power output end is connected to the piston member (6) and is used to drive the piston member (6) to move along the direction of the central axis; At least three pressure regulating valves (8) are respectively arranged in the corresponding openings (4), each of the pressure regulating valves (8) comprises a pressure-bearing portion and a flow regulating portion, the pressure-bearing portion is connected to the corresponding flow regulating portion, the pressure-bearing portion is used to withstand the water pressure on the periphery of the bottle body (1), the flow regulating portion is arranged in the opening (4), and the flow regulating portion is used to adjust the size of the opening (4); When in use, the bottle body (1) is lowered, the linear reciprocating motion assembly (7) drives the piston member (6) to move upward, and water enters the bottle body (1) from the opening (4). When the water pressure on the pressure-bearing part increases, the flow regulating part adjusts the corresponding opening (4) to increase in size.

2. The deep water sampling device according to claim 1, characterized in that: The pressure regulating valve (8) comprises a valve seat (801), a first stopper (802), a second stopper (803), and a first elastic member (804). The valve seat (801) is an annular member, and both end surfaces of the annular member are arranged as conical surfaces expanding outward. The first stopper (802) is a pressure-bearing part, and the first stopper (802) is arranged at the first end of the annular member. The side surface of the first stopper (802) cooperates with the conical surface of the first end of the annular member. A first through hole is opened on the first stopper (802), and a first one-way valve is arranged at the first through hole. The second stopper (803) is a flow regulating part, and the second stopper (803) is symmetrically arranged with the first stopper (802). A first elastic member (804) is connected between the first stopper (802) and the second stopper (803), and the first elastic member (804) is used to pull the first stopper (802) and the second stopper (803) to tightly cooperate with the corresponding conical surfaces.

3. The deep water sampling device according to claim 2, characterized in that: A accommodating cavity is provided inside the first stopper (802), and the first through hole passes through the accommodating cavity. The first one-way valve comprises a baffle (805) and a second elastic member (806). The baffle (805) and the second elastic member (806) are both arranged in the accommodating cavity. One end of the second elastic member (806) is connected to the baffle (805), and the other end is connected to the inner wall of the accommodating cavity. The second elastic member (806) is used to push the baffle (805) to block the through hole. The second elastic member (806) is arranged on a side of the first stopper (802) close to the first elastic member (804).

4. The deep water sampling device according to claim 3, characterized in that: The second stopper (803) has the same structure as the first stopper (802), and the second one-way valve has the same structure as the first one-way valve but in opposite directions.

5. The deep water sampling device according to claim 2, characterized in that: A push plate (807) is arranged on the outer side of the first stopper (802), and a hole communicating with the first through hole is opened on the push plate (807), a gap is left between the push plate (807) and the first stopper (802), and a guide groove is opened on the first stopper (802), and a push rod (808) is slidably arranged in the guide groove, one end of the push rod (808) is fixedly connected to the push plate (807), and the other end is in contact with the first stopper (802).

6. The deep water sampling device according to claim 1, characterized in that: A water outlet (3) is arranged at the center of the top of the bottle body (1), and a third one-way valve is arranged at the water outlet (3). A plurality of water inlets (2) are arranged at the top of the bottle body (1), and the plurality of water inlets (2) are evenly arranged around the central axis, and a fourth one-way valve is arranged at each of the water inlets (2).

7. The deep water sampling device according to claim 1, characterized in that: The reciprocating linear motion assembly (7) comprises a stepper motor (703), the stepper motor (703) is arranged at the bottom center position of the bottle body (1), the output end of the stepper motor (703) is connected to a screw rod (701), the center line of the screw rod (701) coincides with the center axis, the screw rod (701) is threadedly connected to the piston member (6), and a limiting structure is arranged between the piston member (6) and the bottle body (1).

8. The deep water sampling device according to claim 7, characterized in that: The limiting structure comprises a limiting rod (702), the limiting rod (702) is parallel to the central axis, the limiting rod (702) is fixedly connected to the inner wall of the bottle body (1), and a limiting groove is provided on the piston member (6), and the limiting groove is slidably connected to the limiting rod (702).

9. The deep water sampling device according to claim 7, characterized in that: The bottom of the bottle body (1) is connected to a counterweight (5), the counterweight (5) is arranged in a cone shape with the tip of the cone facing downwards, a receiving groove is arranged inside the counterweight (5), and the stepping motor (703) is arranged inside the receiving groove.

10. A method for sampling deep water, using the device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: The bottle body (1) is lowered, and the linear reciprocating motion assembly (7) drives the piston member (6) to move upward, and water enters the bottle body (1) from the opening (4), causing the bottle body (1) to move downward; To collect water samples, the linear reciprocating motion component (7) drives the piston (6) to move downward, and the water sample enters the bottle body (1) from the water inlet (2); The water sample is drawn out, and the linear reciprocating motion component (7) drives the piston member (6) to move upward, and the water sample is drawn out from the drain port (3).

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