A mobile water sample collection device

Abstract

The present invention provides a mobile water sample collection device, belonging to the technical field of sampling equipment, which includes a sampler, a thrower and a towing rope. The sampler is used for collecting water samples; the thrower is used for throwing the sampler to a target position; one end of the towing rope is connected to the sampler to tow the sampler. Among them, the sampler includes a floating body, a depth rope, a sampling cylinder, a flexible valve, a negative pressure component and a negative pressure switch component. The floating body is connected to the towing rope to float on the water surface; one end of the depth rope is connected to the floating body; the sampling cylinder is connected to the other end of the depth rope to define the water intake depth through the depth rope; and a water inlet is provided on the sampling cylinder; the flexible valve is arranged on the water inlet and closes the water inlet in the natural state; the negative pressure component is arranged on the sampling cylinder to provide negative pressure for the sampling cylinder so that the sampling cylinder sucks water from the flexible valve; the negative pressure switch component is connected to the negative pressure component to start the negative pressure component to form negative pressure. The present invention is flexible and convenient to use and has strong mobility.

Description

Technical Field

[0001] The present invention belongs to the technical field of sampling devices, and more specifically, relates to a mobile water sample collection device. Background Art

[0002] In hydrological work, it is often necessary to randomly sample the water in a river or a reservoir. However, the current method of random sampling is not very convenient. The traditional sampling method usually uses a ship to sail to the designated sampling area for sampling. However, water operation has certain risks, and more personnel and equipment are required. At present, in some cases, drones can be used for sampling, but it is difficult to obtain water samples at a specific depth, and it is easy for the drone equipment to fall into the water when it is too close to the water surface, which poses a relatively high requirement for the operation level of the drone operator. Summary of the Invention

[0003] An object of the present invention is to provide a mobile water sample collection device to solve the technical problem in the prior art that the current method of randomly sampling water samples is not very convenient.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide a mobile water sample collection device, including a sampler, a thrower, and a towing rope. The sampler is used for collecting water samples; the thrower is used for throwing the sampler to a target position; one end of the towing rope is connected to the sampler to tow the sampler; wherein, the sampler includes a floating body, a depth rope, a sampling cylinder, a flexible valve, a negative pressure assembly, and a negative pressure switch assembly. The floating body is connected to the towing rope to float on the water surface; one end of the depth rope is connected to the floating body; the sampling cylinder is connected to the other end of the depth rope to define the water intake depth through the depth rope; and the sampling cylinder is provided with a water inlet; the flexible valve is arranged on the water inlet and closes the water inlet in a natural state; the negative pressure assembly is arranged on the sampling cylinder to provide negative pressure for the sampling cylinder so that the sampling cylinder sucks water from the flexible valve; the negative pressure switch assembly is connected to the negative pressure assembly to start the negative pressure assembly to form negative pressure.

[0005] Combined with the above technical solution, in a possible implementation manner, the mobile water sample collection device further includes a wire winding and unwinding assembly, which is connected to the other end of the towing rope to unwind the towing rope when throwing the sampler and wind up the towing rope when retrieving the sampler.

[0006] Combined with the above technical solution, in a possible implementation manner, the sampling cylinder includes a conical shell and a rear cylinder body. The water inlet is arranged on the conical shell, and the rear end of the conical shell is detachably connected to the front end of the rear cylinder body.

[0007] Combined with the above technical solution, in a possible implementation, the negative pressure component includes a piston and an elastic member. The piston is slidably disposed in the sampling cylinder, and a water sample chamber is provided on the side of the sampling cylinder where the water inlet is provided; one end of the elastic member is connected to or in contact with the sampling cylinder, and the other end is connected to or in contact with the piston, for pushing the piston to move in a direction away from the water inlet to generate negative pressure; wherein, the negative pressure switch component is used to lock the position of the piston when the elastic member accumulates elastic potential energy, and release the limitation on the position of the piston when triggered.

[0008] Combined with the above technical solution, in a possible implementation, the water inlet is provided at the front end of the sampling cylinder, the rear end of the sampling cylinder is an open structure, the piston and the rear end of the sampling cylinder form a rear chamber, and during throwing, the floating body and the depth rope are located in the rear chamber.

[0009] Combined with the above technical solution, in a possible implementation, the negative pressure switch component includes a damping rod, at least two clamping rods, a damper and a water-soluble wire. The damping rod is located in the rear chamber of the sampling cylinder and is fixedly connected to the piston; at least two clamping rods are rotatably disposed in the rear chamber of the sampling cylinder and are oppositely arranged, so that when the floating body is located between the rear ends of the two clamping rods, the front ends of the two clamping rods clamp the damping rod, and when the floating body disengages from the two clamping rods, the damping rod is released; the damper is fixedly disposed in the rear chamber of the sampling cylinder and is sleeved on the damping rod to apply damping to the damping rod; the water-soluble wire is connected to the rear end of the sampling cylinder to limit the floating body in the rear chamber and make the floating body located between the rear ends of the two clamping rods.

[0010] Combined with the above technical solution, in a possible implementation, the negative pressure component further includes an inner sealing ring and an outer sealing ring. The inner sealing ring and the outer sealing ring are provided in the sampling cylinder; the inner sealing ring is located on the side of the piston facing the water inlet, for sealingly cooperating with the piston to close the gap between the piston and the sampling cylinder when the piston is locked by the negative pressure switch component; the outer sealing ring is located on the side of the piston facing away from the water inlet, for sealingly cooperating with the piston to close the gap between the piston and the sampling cylinder after the piston is released by the negative pressure switch component.

[0011] Combined with the above technical solution, in a possible implementation, the elastic member includes a conical spring provided in the water sample chamber of the sampling cylinder, and a weight structure is provided in the conical shell at the front end of the sampling cylinder; the clamping rod is a curved rod structure and a rotating chuck is provided at the end; a wire groove or a wire hole is provided at the rear end of the sampling cylinder; the floating body is a gourd-shaped structure.

[0012] Combined with the above technical solution, in a possible implementation, the water inlet is provided with a water inlet nozzle, a flexible valve is provided on the water inlet nozzle, and the water inlet nozzle is detachably connected to the conical shell; the sampling cylinder further includes a rear end cover, and the rear end cover is buckled on the rear end of the rear cylinder body.

[0013] Combined with the above technical solution, in a possible implementation, the thrower is a gun-type thrower or a vehicle-mounted thrower.

[0014] The beneficial effects of the mobile water sample collection device provided by the present invention are as follows: Compared with the prior art, through the cooperation of the sampler, the throwing device and the towing rope, the sampler can be accurately thrown to a relatively far position and retrieved by using the towing rope, which is flexible and convenient to use and has strong mobility; when sampling, through the cooperation of the floating body, the depth rope, the sampling cylinder, the flexible valve, the negative pressure component and the negative pressure switch component, the sampling cylinder can automatically enter a preset depth below the water surface, so that the sampling position is relatively accurate, and since the sampling cylinder, the flexible valve, the negative pressure component and the negative pressure switch component can form a closed space after sampling, when retrieving the sampler, the water sample does not exchange with the water at other positions, and the water sample can be ensured not to be polluted. Brief Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of the mobile water sample collection device provided by the embodiment of the present invention;

[0017] Figure 2 It is a cross-sectional structural diagram of the sampler part of the mobile water sample collection device provided by the embodiment of the present invention in the throwing state;

[0018] Figure 3 It is a cross-sectional structural diagram of the sampler part of the mobile water sample collection device provided by the embodiment of the present invention after entering the water for sampling.

[0019] Among them, the reference numerals in the drawings are as follows:

[0020] 10. Sampler; 11. Floating body; 12. Depth rope; 14. Flexible valve;

[0021] 131. Water inlet; 132. Cone shell; 133. Rear cylinder; 134. Counterweight structure; 135. Rear end cover;

[0022] 151. Piston; 152. Elastic member; 153. Inner sealing ring; 154. Outer sealing ring;

[0023] 161. Damping rod; 162. Clamping rod; 163. Damper; 164. Water-soluble line;

[0024] 20. Throwing device; 30. Towing rope; 40. Wire winding and unwinding assembly; 50. Water surface. Detailed Embodiments

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0026] It should be further noted that the drawings and embodiments of the present invention mainly describe and illustrate the concept of the present invention. On the basis of this concept, the specific forms and settings of some connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above specific forms and settings in a well-known manner.

[0027] When an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] The orientation terms "inside" and "outside" refer to the inside and outside of the contour of each component itself. The terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0029] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, and the meaning of "several" is one or more, unless otherwise specifically defined.

[0030] Now, the mobile water sample collection device provided by the present invention will be described.

[0031] As Figure 1 and Figure 2As shown in the figure, the first embodiment of the present invention provides a mobile water sample collection device, which includes a sampler 10, a thrower 20, and a towing rope 30. The sampler 10 is used to collect water samples; the thrower 20 is used to throw the sampler 10 to the target position; one end of the towing rope 30 is connected to the sampler 10 to tow the sampler 10; wherein, the sampler 10 includes a floating body 11, a depth rope 12, a sampling cylinder, a flexible valve 14, a negative pressure assembly, and a negative pressure switch assembly. The floating body 11 is connected to the towing rope 30 to float on the water surface; one end of the depth rope 12 is connected to the floating body 11; the sampling cylinder is connected to the other end of the depth rope 12 to define the water intake depth through the depth rope 12; and the sampling cylinder is provided with a water inlet 131; the flexible valve 14 is arranged on the water inlet 131 and closes the water inlet 131 in the natural state; the negative pressure assembly is arranged on the sampling cylinder to provide negative pressure for the sampling cylinder so that the sampling cylinder sucks water from the flexible valve 14; the negative pressure switch assembly is connected to the negative pressure assembly to start the negative pressure assembly to form negative pressure.

[0032] Before use, adjust the sampling depth by adjusting the length of the depth rope 12, and lock the negative pressure assembly through the negative pressure switch assembly; then throw the sampler 10 out through the thrower 20, and at the same time one end of the towing rope 30 is taken away by the sampler 10; when the sampler 10 falls into the water, the floating body 11 floats on the water surface, and the sampling cylinder sinks until the depth rope 12 is straightened, that is, the sampling cylinder reaches the preset depth; then the negative pressure switch assembly controls the negative pressure assembly to start, so that a negative pressure is generated in the water sample chamber of the sampling cylinder, and then the flexible valve 14 at the water inlet 131 opens to absorb water. When a certain amount of water is sucked into the water sample chamber of the sampling cylinder, the internal and external pressures are balanced, and the flexible valve 14 closes again, making the water sample chamber of the sampling cylinder a closed environment; then the sampler 10 is retrieved through the towing rope 30, and after the water in the sampling cylinder is taken out, the water sample collection is completed.

[0033] Compared with the prior art, the mobile water sample collection device provided in this embodiment can accurately throw the sampler 10 to a relatively far position through the cooperation of the sampler 10, the thrower 20, and the towing rope 30, and retrieve it using the towing rope 30, which is flexible and convenient to use and has strong mobility; when sampling, through the cooperation of the floating body 11, the depth rope 12, the sampling cylinder, the flexible valve 14, the negative pressure assembly, and the negative pressure switch assembly, the sampling cylinder can automatically enter the preset depth below the water surface, making the sampling position relatively accurate, and because the sampling cylinder, the flexible valve 14, the negative pressure assembly, and the negative pressure switch assembly can form a closed space after sampling, when retrieving the sampler 10, the water sample does not exchange with the water in other positions, and the water sample can be ensured not to be contaminated.

[0034] As Figures 1 to 3 shown, a specific embodiment provided by the present invention on the basis of the first embodiment is as follows:

[0035] The mobile water sample collection device further includes a wire winding and unwinding assembly 40, which is connected to the other end of the towing rope 30 and is used to pay out the towing rope 30 when casting the sampler 10 and to retract the towing rope 30 when retrieving the sampler 10.

[0036] By providing the wire winding and unwinding assembly 40, it is convenient to wind and unwind the towing rope 30, avoiding entanglement of the towing rope 30 and affecting its use.

[0037] In some embodiments, the thrower 20 is a throwing device such as a throwing gun or a throwing tube driven by compressed air or gunpowder for throwing rescue supplies. The thrower 20 can be a gun-type thrower or a vehicle-mounted thrower; the towing rope 30 is made of fishing line, steel wire or life-saving rope; the wire winding and unwinding assembly 40 can be a wire spool, a fishing rod wire release or a life-saving rope bag and other component devices.

[0038] The sampling cylinder includes a conical shell 132 and a rear cylinder body 133. The water inlet 131 is provided on the conical shell 132. The rear end of the conical shell 132 is detachably connected to the front end of the rear cylinder body 133 through forms such as a threaded structure, a clamping structure, and a plugging structure. After disassembly, it is convenient to pour out the collected water sample. Moreover, the shape of the conical shell 132 can be more in line with aerodynamics, so that after the thrower 20 throws the sampler 10, the landing point can be more stable and controllable.

[0039] The negative pressure assembly includes a piston 151 and an elastic member 152. The piston 151 is slidably disposed in the sampling cylinder, and a water sample chamber is provided on the side of the sampling cylinder where the water inlet 131 is provided; one end of the elastic member 152 is connected to or in contact with the sampling cylinder, and the other end is connected to or in contact with the piston 151, and is used to push the piston 151 to move away from the water inlet 131 to generate negative pressure; wherein, the negative pressure switch assembly is used to lock the position of the piston 151 when the elastic member 152 accumulates elastic potential energy and to release the limitation on the position of the piston 151 when triggered.

[0040] Before use, the elastic member 152 is compressed or stretched by the piston 151 so that the elastic member 152 accumulates elastic potential energy, and the position of the piston 151 is locked by the negative pressure switch assembly; then the sampler 10 is thrown by the thrower 20; when the sampling cylinder sinks to a preset depth, the negative pressure switch assembly unlocks the piston 151, and the elastic member 152 drives the piston 151 to move, so that a negative pressure is generated in the water sample chamber of the sampling cylinder, and then the flexible valve 14 at the water inlet 131 is opened to absorb water. When a certain amount of water is inhaled into the water sample chamber of the sampling cylinder, the internal and external pressures are balanced, and the flexible valve 14 closes again, making the water sample chamber of the sampling cylinder a closed environment.

[0041] The water inlet 131 is arranged at the front end of the sampling cylinder. The rear end of the sampling cylinder is of an open structure. The piston 151 and the rear end of the sampling cylinder form a rear chamber. During casting, the floating body 11 and the depth rope 12 are located in the rear chamber. This can avoid excessive resistance generated by the floating body 11. During the casting process, only the friction between the sampling cylinder and the external air is generated, which can facilitate the thrower 20 to throw the sampler 10, and the landing point can be more stable and controllable.

[0042] To ensure the convenience of the depth rope 12 for depth adjustment, in some embodiments, the depth rope 12 can be provided with scales, and the floating body 11 or the sampling cylinder is provided with a fixture or a clamp that can be adjustably connected to the depth rope 12; in other embodiments, the depth rope 12 is connected to the rear end of the sampling cylinder, the floating body 11 is provided with a rope-passing loop, the depth rope 12 is a part of the towing rope 30, and passes through the rope-passing loop. The depth rope 12 and the towing rope 30 are detachably fixed at the rope-passing loop through a buckle structure.

[0043] The negative pressure switch assembly can be a mechanical delay mechanism or an electrically controlled trigger mechanism such as an electrically controlled valve; in some specific embodiments, the negative pressure switch assembly includes a damping rod 161, at least two clamping rods 162, a damper 163 and a water-soluble wire 164. The damping rod 161 is located in the rear chamber of the sampling cylinder and is fixedly connected to the piston 151; at least two clamping rods 162 are rotatably arranged in the rear chamber of the sampling cylinder and are arranged oppositely, so that when the floating body 11 is located between the rear ends of the two clamping rods 162, the front ends of the two clamping rods 162 clamp the damping rod 161, and when the floating body 11 disengages from the two clamping rods 162, the damping rod 161 is released; the damper 163 is fixedly arranged in the rear chamber of the sampling cylinder and is sleeved on the damping rod 161 to apply damping to the damping rod 161, so as to be able to adjust the moving speed of the piston 151 and avoid the piston 151 moving rapidly when the sampling cylinder is not in place, which affects sampling; the water-soluble wire 164 is connected to the rear end of the sampling cylinder to limit the floating body 11 in the rear chamber and make the floating body 11 located between the rear ends of the two clamping rods 162.

[0044] During loading, the elastic member 152 is in a state of storing elastic potential energy. The floating body 11 is limited in the rear chamber through the water-soluble line 164, so that the two clamping rods 162 are in an open state; the damping rod 161 is clamped by the two clamping rods 162 to prevent the piston 151 from moving; after the sampler 10 is thrown, due to the restraint of the water-soluble line 164, during the flight of the sampler 10, the overall state will still be maintained; only after the sampler 10 enters the water, when the water-soluble line 164 contacts water and is dissolved by water, and after water enters the rear chamber, the floating body 11 will float out of the rear chamber. To improve the water intake efficiency, some water intake holes can be provided at the rear end of the rear cylinder 133; at the same time, the two clamping rods 162 are released and the damping rod 161 is loosened, so that the damping rod 161 is only affected by the damper 163. As a result, under the action of the elastic member 152, the piston 151 slowly moves along the sampling cylinder, creating a negative pressure in the water sample chamber, and sucking water for sampling through the flexible valve 14.

[0045] The negative pressure assembly further includes an inner sealing ring 153 and an outer sealing ring 154, which are arranged in the sampling cylinder; the inner sealing ring 153 is located on the side of the piston 151 facing the water inlet 131, and is used to be hermetically matched with the piston 151 when the piston 151 is locked by the negative pressure switch assembly, that is, before the sampling cylinder reaches the preset depth, to seal the gap between the piston 151 and the sampling cylinder to prevent water in the non-water intake area from entering the water sample chamber of the sampling cylinder; the outer sealing ring 154 is located on the side of the piston 151 facing away from the water inlet 131, and is used to be hermetically matched with the piston 151 after the piston 151 is released by the negative pressure switch assembly, that is, after the sampling cylinder takes water, to seal the gap between the piston 151 and the sampling cylinder to prevent the water in the water sample chamber of the sampling cylinder from exchanging with the water in the non-water intake area when the sampler 10 is retrieved.

[0046] The elastic member 152 includes a conical spring arranged in the water sample chamber of the sampling cylinder to obtain a higher compression ratio.

[0047] To ensure that the sampling cylinder can sink smoothly, a weight structure 134 is provided in the conical shell 132 at the front end of the sampling cylinder to keep the sampling cylinder sinking in a vertically downward manner, and at the same time it is also convenient for the separation of the floating body 11 from the sampling cylinder. At the same time, the weight structure 134 can also provide support for the conical spring.

[0048] The clamping rod 162 is a curved rod structure, and a rotating chuck is provided at the end to better fit the damping rod 161 and clamp the damping rod 161.

[0049] The rear end of the sampling cylinder is provided with a wire groove or a wire hole for the fixed connection of the depth rope 12 and the water-soluble line 164, and for the traction rope 30 to pass through.

[0050] The floating body 11 is in a gourd shape so as to be more conveniently placed into the rear cylinder body 133, reduce the jamming during floating, and the towing rope 30 and the depth rope 12 can be fixed in the middle of the floating body 11 to avoid slipping.

[0051] The water inlet 131 is provided with a water inlet nozzle, and the flexible valve membrane 14 is arranged on the water inlet nozzle. The water inlet nozzle is detachably connected to the conical shell 132 in forms such as a threaded structure, a clamping structure, a plugging structure, etc., so as to facilitate the replacement of the flexible valve membrane 14.

[0052] The sampling cylinder further includes a rear end cover 135 which is buckled on the rear end of the rear cylinder body 133 to block the rear cylinder body 133, can also be used for installing a jet can, and can also be used for other purposes that can facilitate the operation of the thrower 20 or protect the sampling cylinder. The rear end cover 135 can be directly separated under the impact after the sampler 10 enters the water.

[0053] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A mobile water sample collection device, characterized in that, Comprising: A sampler (10) for collecting water samples; A thrower (20) for throwing the sampler (10) to a target position; A towing rope (30) with one end connected to the sampler (10) for towing the sampler (10); Wherein, the sampler (10) comprises: A floating body (11) connected to the towing rope (30) for floating on the water surface; A depth rope (12) with one end connected to the floating body (11); A sampling cylinder connected to the other end of the depth rope (12) to define the water intake depth through the depth rope (12); and a water inlet (131) is provided on the sampling cylinder; A flexible valve (14) provided on the water inlet (131) and closing the water inlet (131) in the natural state; A negative pressure assembly provided on the sampling cylinder for providing negative pressure to the sampling cylinder so that the sampling cylinder sucks water from the flexible valve (14); A negative pressure switch assembly connected to the negative pressure assembly to start the negative pressure assembly to form negative pressure; The negative pressure assembly comprises: A piston (151) slidably disposed in the sampling cylinder, and a water sample chamber is provided on one side of the sampling cylinder where the water inlet (131) is provided; An elastic member (152) with one end connected to or in contact with the sampling cylinder and the other end connected to or in contact with the piston (151) for pushing the piston (151) to move away from the water inlet (131) to generate negative pressure; Wherein, the negative pressure switch assembly is used to lock the position of the piston (151) when the elastic member (152) accumulates elastic potential energy and release the limitation on the position of the piston (151) when triggered; The water inlet (131) is provided at the front end of the sampling cylinder, the rear end of the sampling cylinder is an open structure, the piston (151) and the rear end of the sampling cylinder form a rear chamber, and during throwing, the floating body (11) and the depth rope (12) are located in the rear chamber; The negative pressure switch assembly comprises: A damping rod (161) located in the rear chamber of the sampling cylinder and fixedly connected to the piston (151); At least two clamping rods (162) rotatably disposed in the rear chamber of the sampling cylinder and oppositely arranged so that when the floating body (11) is located between the rear ends of the two clamping rods (162), the front ends of the two clamping rods (162) clamp the damping rod (161), and when the floating body (11) disengages from the two clamping rods (162), the damping rod (161) is released; A damper (163) fixedly disposed in the rear chamber of the sampling cylinder and sleeved on the damping rod (161) to apply damping to the damping rod (161); A water-soluble line (164) connected to the rear end of the sampling cylinder to limit the floating body (11) in the rear chamber and make the floating body (11) located between the rear ends of the two clamping rods (162).

2. The mobile water sample collection device according to claim 1, characterized in that, The mobile water sample collection device further comprises: The pay-off and take-up assembly (40) is connected to the other end of the towing rope (30) and is used to pay out the towing rope (30) when the sampler (10) is thrown and to take in the towing rope (30) when the sampler (10) is retrieved.

3. The mobile water sample collection device according to claim 1, characterized in that: The sampling cylinder includes a conical shell (132) and a rear cylinder body (133). The water inlet (131) is arranged on the conical shell (132), and the rear end of the conical shell (132) is detachably connected to the front end of the rear cylinder body (133).

4. The mobile water sample collection device according to claim 1, characterized in that: The negative pressure assembly further includes an inner sealing ring (153) and an outer sealing ring (154). The inner sealing ring (153) and the outer sealing ring (154) are arranged inside the sampling cylinder. The inner sealing ring (153) is located on the side of the piston (151) facing the water inlet (131) and is used to be in sealing cooperation with the piston (151) to close the gap between the piston (151) and the sampling cylinder when the piston (151) is locked by the negative pressure switch assembly. The outer sealing ring (154) is located on the side of the piston (151) facing away from the water inlet (131) and is used to be in sealing cooperation with the piston (151) to close the gap between the piston (151) and the sampling cylinder after the piston (151) is released by the negative pressure switch assembly.

5. The mobile water sample collection device according to claim 1, characterized in that: The elastic member (152) includes a conical spring arranged in the water sample chamber of the sampling cylinder. A weight structure (134) is arranged inside the conical shell (132) at the front end of the sampling cylinder. The clamping rod (162) has a curved rod structure and a rotating chuck is arranged at the end. A wire groove or a wire hole is arranged at the rear end of the sampling cylinder. The floating body (11) has a gourd-shaped structure.

6. The mobile water sample collection device according to claim 3, wherein: The water inlet (131) is provided with a water inlet nozzle, the flexible valve membrane (14) is arranged on the water inlet nozzle, and the water inlet nozzle is detachably connected to the conical shell (132). The sampling cylinder further includes a rear end cover (135), and the rear end cover (135) is buckled at the rear end of the rear cylinder body (133).

7. The mobile water sample collection device according to claim 1, wherein: The thrower (20) is a gun-type thrower or a vehicle-mounted thrower.

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