Movable water sample collecting device

Abstract

The invention provides a mobile water sample collection device, which belongs to the technical field of sampling equipment, and comprises a sampler, a thrower and a traction rope, the sampler is used for collecting a water sample; the thrower is used for throwing the sampler to a target position; one end of the pulling rope is connected with the sampler and used for pulling the sampler; wherein the sampler comprises a floating body, a depth rope, a sampling cylinder, a flexible valve, a negative pressure assembly and a negative pressure switch assembly, and the floating body is connected with a traction rope and used for floating on the water surface; one end of the depth rope is connected with the floating body; the sampling cylinder is connected with the other end of the depth rope so as to limit the water taking depth through the depth rope; a water inlet is formed in the sampling cylinder; the flexible valve is arranged on the water inlet and seals the water inlet in a natural state; the negative pressure assembly is arranged on the sampling cylinder and is used for providing negative pressure for the sampling cylinder, so that the sampling cylinder absorbs water from the flexible valve; the negative pressure switch assembly is connected with the negative pressure assembly so as to start the negative pressure assembly to form negative pressure. The device is flexible and convenient to use and high in maneuverability.

Description

Technical Field

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

[0002] In hydrological work, it is often necessary to randomly sample water in rivers or reservoirs, but the current method of random sampling is not very convenient. The traditional sampling method usually uses ships to sail to the designated sampling area for sampling, but water operations are dangerous and require more personnel and equipment. At present, drones can be used for sampling in some cases, but it is difficult to obtain water samples at a specific depth, and drone equipment is too close to the water surface and is easy to fall into the water, which tests the pilot's operating level. Summary of the invention

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

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a mobile water sample collection device, including a sampler, a thrower and a traction rope, the sampler is used to collect water samples; the thrower is used to throw the sampler to the target position; one end of the traction rope is connected to the sampler for towing the sampler; wherein the sampler includes a float, a depth rope, a sampling tube, a flexible valve, a negative pressure assembly and a negative pressure switch assembly, the float is connected to the traction rope for floating on the water surface; one end of the depth rope is connected to the float; the sampling tube is connected to the other end of the depth rope to limit the water extraction depth by the depth rope; and a water inlet is provided on the sampling tube; the flexible valve is provided on the water inlet and closes the water inlet in a natural state; the negative pressure assembly is provided on the sampling tube to provide negative pressure for the sampling tube so that the sampling tube absorbs 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] In combination with the above technical solution, in a possible implementation, the mobile water sample collection device also includes a line retracting assembly, which is connected to the other end of the traction rope for releasing the traction rope when casting the sampler and retracting the traction rope when retracting the sampler.

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

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

[0008] In combination with the above technical solution, in a possible implementation method, the water inlet is arranged at the front end of the sampling tube, the rear end of the sampling tube is an open structure, the piston and the rear end of the sampling tube form a rear chamber, and when casting, the float and the depth rope are located in the rear chamber.

[0009] In combination with the above technical scheme, in a possible implementation method, the negative pressure switch assembly includes a damping rod, at least two clamping rods, a damper and a water-soluble line, 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 arranged in the rear chamber of the sampling cylinder and are arranged relative to each other, so that when the float 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 float is separated from the two clamping rods, the damping rod is released; the damper is fixedly arranged 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 line is connected to the rear end of the sampling cylinder to limit the float in the rear chamber and make the float located between the rear ends of the two clamping rods.

[0010] In combination with the above technical solution, in a possible implementation method, the negative pressure component also includes an inner sealing ring and an outer sealing ring, and the inner sealing ring and the outer sealing ring are arranged in the sampling cylinder; the inner sealing ring is located on the side of the piston facing the water inlet, and is used to seal with the piston when the piston is locked by the negative pressure switch assembly to close the gap between the piston and the sampling cylinder; the outer sealing ring is located on the side of the piston facing away from the water inlet, and is used to seal with the piston after the piston is released by the negative pressure switch assembly to close the gap between the piston and the sampling cylinder.

[0011] In combination with the above technical solution, in a possible implementation method, the elastic part includes a conical spring arranged in the water sample chamber of the sampling tube, and a counterweight structure is provided in the conical shell at the front end of the sampling tube; the clamping rod is a curved rod structure, and a rotating clamp is provided at the end; a wire groove or a wire hole is provided at the rear end of the sampling tube; and the float is a gourd-shaped structure.

[0012] In combination 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 cone shell; the sampling cylinder also includes a rear end cover, which is buckled on the rear end of the rear cylinder body.

[0013] In combination 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: compared with the prior art, the present invention can cast the sampler to a farther position more accurately through the cooperation of the sampler, the thrower and the traction rope, and can be retrieved by the traction rope, which is flexible and convenient to use and has strong maneuverability; when sampling, through the cooperation of the float, the depth rope, the sampling tube, the flexible valve, the negative pressure component and the negative pressure switch component, the sampling tube can automatically enter the preset depth below the water surface, so that the sampling position is more accurate, and because the sampling tube, the flexible valve, the negative pressure component and the negative pressure switch component can form a closed space after sampling, when the sampler is retrieved, the water sample does not exchange with the water at other positions, which can ensure that the water sample is not contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A schematic diagram of the structure of a mobile water sample collection device provided in an embodiment of the present invention; Figure 2 A schematic cross-sectional structural diagram of a sampler portion of a mobile water sample collection device provided by an embodiment of the present invention in a casting state; Figure 3 A schematic cross-sectional structural diagram of the sampler portion of the mobile water sample collection device provided in an embodiment of the present invention after entering the water for sampling.

[0017] Among them, the reference numerals in the figures are as follows: 10. Sampler; 11. Float; 12. Depth rope; 14. Flexible valve; 131, water inlet; 132, cone shell; 133, rear cylinder; 134, counterweight structure; 135, rear end cover; 151, piston; 152, elastic member; 153, inner sealing ring; 154, outer sealing ring; 161. damping rod; 162. clamping rod; 163. damper; 164. water-soluble line; 20. Casting device; 30. Towing rope; 40. Retracting and releasing line assembly; 50. Water surface. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0019] It should be further explained that the drawings and implementation modes of the present invention mainly describe 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-mentioned specific forms and settings in a well-known manner.

[0020] When an element is referred to as being "fixed to" or "disposed on" another element, it may 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 may be directly connected to the other element or indirectly connected to the other element.

[0021] The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. The directions or positional relationships indicated by the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They 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 limiting the present invention.

[0022] 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, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0023] The mobile water sample collecting device provided by the present invention is now described.

[0024] like Figure 1 and Figure 2As shown, the first embodiment of the present invention provides a mobile water sample collection device, including a sampler 10, a thrower 20 and a traction rope 30, wherein the sampler 10 is used to collect water samples; the thrower 20 is used to throw the sampler 10 to a target position; one end of the traction rope 30 is connected to the sampler 10 to tow the sampler 10; wherein the sampler 10 includes a float 11, a depth rope 12, a sampling tube, a flexible valve 14, a negative pressure component and a negative pressure switch component, the float 11 is connected to the traction rope 30, Used to float on the water surface; one end of the depth rope 12 is connected to the float 11; the sampling tube is connected to the other end of the depth rope 12 to limit the water intake depth through the depth rope 12; and a water inlet 131 is provided on the sampling tube; a flexible valve 14 is provided on the water inlet 131 and closes the water inlet 131 in a natural state; a negative pressure component is provided on the sampling tube to provide negative pressure for the sampling tube so that the sampling tube absorbs water from the flexible valve 14; a negative pressure switch component is connected to the negative pressure component to start the negative pressure component to form negative pressure.

[0025] Before use, the sampling depth is adjusted by adjusting the length of the depth rope 12, and the negative pressure assembly is locked by the negative pressure switch assembly; then the sampler 10 is thrown out by the thrower 20, and at the same time, one end of the traction rope 30 is taken away by the sampler 10; when the sampler 10 falls into the water, the float 11 floats on the water surface, and the sampling tube sinks until the depth rope 12 is straightened, that is, the sampling tube reaches the preset depth; then the negative pressure switch assembly controls the negative pressure assembly to start, so that negative pressure is generated in the water sample chamber of the sampling tube, and then the flexible valve 14 of the water inlet 131 opens to absorb water. When the water sample chamber of the sampling tube absorbs a certain amount of water, the internal and external pressures are balanced, and the flexible valve 14 continues to close, so that the water sample chamber of the sampling tube becomes a closed environment; then the sampler 10 is retrieved by the traction rope 30, and the water in the sampling tube is taken out to complete the water sample collection.

[0026] Compared with the prior art, the mobile water sample collection device provided in this embodiment can accurately cast the sampler 10 to a farther position through the cooperation of the sampler 10, the thrower 20 and the towing rope 30, and can be retrieved by the towing rope 30, so it is flexible and convenient to use and has strong maneuverability. When sampling, through the cooperation of the float 11, the depth rope 12, the sampling tube, the flexible valve 14, the negative pressure assembly and the negative pressure switch assembly, the sampling tube can automatically enter the preset depth below the water surface, so that the sampling position is relatively accurate, and because the sampling tube, the flexible valve 14, the negative pressure assembly and the negative pressure switch assembly can form a closed space after sampling, when the sampler 10 is retrieved, the water sample does not exchange with the water at other positions, which can ensure that the water sample is not contaminated.

[0027] like Figures 1 to 3 As shown, a specific implementation mode provided by the present invention based on the first implementation mode is as follows: The mobile water sample collection device also includes a retractable line assembly 40 , which is connected to the other end of the traction rope 30 for releasing the traction rope 30 when casting the sampler 10 and retracting the traction rope 30 when retracting the sampler 10 .

[0028] The provision of the retractable wire assembly 40 can facilitate the retraction and release of the traction rope 30, thereby preventing the traction rope 30 from getting tangled and affecting its use.

[0029] In some embodiments, the thrower 20 is a throwing device such as a throwing gun, a throwing tube, etc. driven by compressed air or gunpowder for throwing life-saving materials. The thrower 20 can be a gun-type thrower or a vehicle-mounted thrower; the traction rope 30 is made of fishing line, steel wire or life rope; the line reel assembly 40 can be a component equipment such as a line reel, a fishing rod reel or a life rope bag.

[0030] The sampling tube includes a cone shell 132 and a rear cylinder 133. The water inlet 131 is arranged on the cone shell 132. The rear end of the cone shell 132 and the front end of the rear cylinder 133 are detachably connected through a threaded structure, a clamping structure, a plug-in structure, etc., so that it is convenient to pour out the water sample after disassembly. Moreover, the shape of the cone shell 132 can be more aerodynamic, so that after the thrower 20 throws the sampler 10, the landing point can be more stable and controllable.

[0031] The negative pressure component includes a piston 151 and an elastic member 152. The piston 151 is slidably arranged in the sampling tube, and a water sample cavity is provided on the side of the sampling tube where the water inlet 131 is provided. One end of the elastic member 152 is connected or in contact with the sampling tube, and the other end is connected or in contact with the piston 151, so as to push the piston 151 to move away from the water inlet 131 to generate negative pressure. 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 contact the limitation of the position of the piston 151 when triggered.

[0032] Before use, the elastic member 152 is compressed or stretched by the piston 151, so that elastic potential energy accumulates on the elastic member 152, and the position of the piston 151 is locked by the negative pressure switch assembly; then the sampler 10 is thrown out by the thrower 20; when the sampling tube 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 negative pressure is generated in the water sample chamber of the sampling tube, and then the flexible valve 14 of the water inlet 131 opens to absorb water. When the water sample chamber of the sampling tube absorbs a certain amount of water, the internal and external pressures are balanced, and the flexible valve 14 continues to close, so that the water sample chamber of the sampling tube becomes a closed environment.

[0033] The water inlet 131 is arranged at the front end of the sampling tube, and the rear end of the sampling tube is an open structure. The piston 151 and the rear end of the sampling tube form a rear chamber. When casting, the float 11 and the depth rope 12 are located in the rear chamber. This can avoid excessive resistance from the float 11. During the casting process, only friction is generated between the sampling tube and the external air, which can make it easier for the thrower 20 to throw the sampler 10, and the landing point can be more stable and controllable.

[0034] To ensure the convenience of depth adjustment by the depth rope 12, in some embodiments, a scale may be provided on the depth rope 12, and a clamp or fixture that can be adjustably connected to the depth rope 12 may be provided on the float 11 or the sampling tube; in other embodiments, the depth rope 12 is connected to the rear end of the sampling tube, and a rope threading ring is provided on the float 11. The depth rope 12 is a part of the traction rope 30 and passes through the rope threading ring. The depth rope 12 and the traction rope 30 are detachably fixed at the rope threading ring by a snap structure.

[0035] The negative pressure switch assembly can be a mechanical delay mechanism or an electric control trigger mechanism such as an electric control 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 line 164, the damping rod 161 is located in the rear chamber of the sampling tube and is fixedly connected to the piston 151; at least two clamping rods 162 are rotatably arranged in the rear chamber of the sampling tube and are arranged relative to each other so that when the float 11 is located between the rear ends of the two clamping rods 162, the front ends of the two clamping rods 162 are clamped The damping rod 161 is provided, and when the float 11 is separated 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 adjust the moving speed of the piston 151 and avoid the piston 151 from moving quickly when the sampling cylinder is not in place, thereby affecting the sampling; the water-soluble line 164 is connected to the rear end of the sampling cylinder to limit the float 11 in the rear chamber and make the float 11 located between the rear ends of the two clamping rods 162.

[0036] During loading, the elastic member 152 is in a state of accumulating elastic potential energy, and the float 11 is limited in the rear chamber by 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; and after the sampler 10 is thrown out, the sampler 10 can maintain its overall state during flight due to the restraint of the water-soluble line 164; only after the sampler 10 enters the water, the water-soluble line 164 contacts the sampler 10, and the sampler 10 is not in a state of being ... After the water enters, it is dissolved by the water, and the water entering the rear chamber will cause the float 11 to float out of the rear chamber. In order to improve the water intake efficiency, some water inlet holes can be set 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, so that the piston 151 moves slowly along the sampling tube under the action of the elastic member 152, so that negative pressure is formed in the water sample chamber, and water is sucked through the flexible valve 14 for sampling.

[0037] The negative pressure component also includes an inner sealing ring 153 and an outer sealing ring 154, which are arranged in the sampling tube; the inner sealing ring 153 is located on the side of the piston 151 facing the water inlet 131, and is used to seal and cooperate with the piston 151 when the piston 151 is locked by the negative pressure switch component, that is, before the sampling tube reaches a preset depth, so as to close the gap between the piston 151 and the sampling tube, so as to prevent water from the non-water-taking area from entering the water sample chamber of the sampling tube; 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 seal and cooperate with the piston 151 after the piston 151 is released by the negative pressure switch component, that is, after the sampling tube takes water, so as to close the gap between the piston 151 and the sampling tube, so as to prevent the water in the water sample chamber of the sampling tube from exchanging with the water in the non-water-taking area when the sampler 10 is retracted.

[0038] The elastic member 152 comprises a conical spring disposed in the water sample chamber of the sampling cartridge to obtain a higher compression ratio.

[0039] To ensure that the sampling tube can sink smoothly, a counterweight structure 134 is provided in the conical shell 132 at the front end of the sampling tube to keep the sampling tube sinking vertically downward, while also facilitating the separation of the float 11 from the sampling tube. At the same time, the counterweight structure 134 can also provide support for the conical spring.

[0040] The clamping rod 162 is a curved rod structure, and a rotating clamp is provided at the end thereof to better fit the damping rod 161 and clamp the damping rod 161 .

[0041] A wire groove or a wire hole is provided at the rear end of the sampling tube for fixed connection between the depth rope 12 and the water-soluble line 164 and for passing the traction rope 30 .

[0042] The float 11 is a gourd-shaped structure, so that it can be placed in the rear cylinder 133 more conveniently and reduce the jamming when floating out. In addition, the traction rope 30 and the depth rope 12 can be fixed in the middle of the float 11 to avoid slipping.

[0043] The water inlet 131 is provided with a water inlet nozzle, and the flexible valve 14 is provided on the water inlet nozzle. The water inlet nozzle is detachably connected to the cone shell 132 through a threaded structure, a clamping structure, a plug-in structure, etc., so as to facilitate the replacement of the flexible valve 14.

[0044] The sampling tube also includes a rear end cover 135, which is buckled at the rear end of the rear cylinder 133 to shield the rear cylinder 133. It can also be used to install a jet tank. It can also be used for other purposes that can facilitate the operation of the thrower 20 or protect the sampling tube. The rear end cover 135 can be directly separated under the impact after the sampler 10 enters the water.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mobile water sample collection device, characterized in that: include: A sampler (10) for collecting water samples; A thrower (20) for throwing the sampler (10) to a target location; A traction rope (30), one end of which is connected to the sampler (10) and is used to tow the sampler (10); Wherein, the sampler (10) comprises: A floating body (11) connected to the traction rope (30) and used to float on the water surface; A depth rope (12), one end of which is connected to the floating body (11); A sampling cylinder connected to the other end of the depth rope (12) so as to limit the water intake depth through the depth rope (12); and a water inlet (131) is provided on the sampling cylinder; A flexible valve (14) is provided on the water inlet (131) and closes the water inlet (131) in a natural state; A negative pressure component is arranged on the sampling cylinder and is used to provide negative pressure to the sampling cylinder so that the sampling cylinder absorbs water from the flexible valve (14); A negative pressure switch assembly is connected to the negative pressure assembly to activate the negative pressure assembly to form negative pressure.

2. The mobile water sample collection device according to claim 1, characterized in that: The mobile water sample collection device also includes: A retractable line assembly (40) is connected to the other end of the traction rope (30) and is used to release the traction rope (30) when casting the sampler (10) and to retract the traction rope (30) when retrieving the sampler (10).

3. The mobile water sample collection device according to claim 1, characterized in that: The sampling cylinder comprises a cone shell (132) and a rear cylinder body (133); the water inlet (131) is arranged on the cone shell (132); and the rear end of the cone 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 or 3, characterized in that: The negative pressure component comprises: A piston (151) is slidably disposed in the sampling tube, and a water sample cavity is provided on a side of the sampling tube on which the water inlet (131) is provided; An elastic member (152), one end of which is connected to or in contact with the sampling tube, and the other end of which is connected to or in contact with the piston (151), and is used to push the piston (151) to move in a direction away from the water inlet (131) to generate negative pressure; 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 contact and limit the position of the piston (151) when triggered.

5. The mobile water sample collection device according to claim 4, characterized in that: The water inlet (131) is arranged at the front end of the sampling tube, the rear end of the sampling tube is an open structure, the piston (151) and the rear end of the sampling tube form a rear chamber, and when casting, the float (11) and the depth rope (12) are located in the rear chamber.

6. The mobile water sample collection device according to claim 5, characterized in that: The negative pressure switch assembly comprises: A 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 disposed in the rear chamber of the sampling tube and are arranged relative to each other, so that when the float (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 float (11) is separated from the two clamping rods (162), the damping rod (161) is released; A damper (163) is 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) is connected to the rear end of the sampling tube to limit the float (11) within the rear chamber and to position the float (11) between the rear ends of the two clamping rods (162).

7. The mobile water sample collection device according to claim 6, characterized in that: The negative pressure assembly further comprises an inner sealing ring (153) and an outer sealing ring (154), wherein the inner sealing ring (153) and the outer sealing ring (154) are arranged in the sampling tube; the inner sealing ring (153) is located on the side of the piston (151) facing the water inlet (131), and is used for sealingly cooperating with the piston (151) to close the gap between the piston (151) and the sampling tube 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 for sealingly cooperating with the piston (151) to close the gap between the piston (151) and the sampling tube after the piston (151) is released by the negative pressure switch assembly.

8. The mobile water sample collection device according to claim 6, characterized in that: The elastic member (152) comprises a conical spring arranged in the water sample chamber of the sampling tube; a counterweight structure (134) is arranged in the conical shell (132) at the front end of the sampling tube; the clamping rod (162) is a curved rod structure, and a rotating clamp is arranged at the end; a wire groove or a wire hole is arranged at the rear end of the sampling tube; and the float (11) is a gourd-shaped structure.

9. The mobile water sample collection device according to claim 3, characterized in that: The water inlet (131) is provided with a water inlet nozzle, the flexible valve (14) is provided on the water inlet nozzle, and the water inlet nozzle is detachably connected to the cone shell (132); the sampling tube also includes a rear end cover (135), and the rear end cover (135) is buckled on the rear end of the rear cylinder body (133).

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

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