Wireless transmission water quality sampler based on pressure detection multi-layer depth positioning

Abstract

The present invention discloses a water quality sampler based on pressure detection and multi-layer depth positioning wireless transmission. A connecting rope can be driven to rotate by a motor, thereby driving the sampling shell to reach different depths. Each sampling bottle is independently filled with water through the opening and closing of an electric control valve. The water flow of other layers will not enter the sampling bottle in advance, and there is no need to empty the sampler. It is characterized in that it includes a support component, a sampling component and a driving component. The retractable component is arranged on the support component, and is used to intermittently start the rope release during the sampling process, so that the sampling component can reach a specific pressure-sensitive water layer. The sampling component is arranged on the retractable component, and is used to perform multiple non-emptying sampling of different water layers in the same river channel. The retractable component is provided with a winding structure, and the intermittent rope release state is maintained before reaching the sampling water layer, so that the sampling component enters the corresponding sampling layer for sampling. After the sampling is completed, the rope is released again to send the sampling component to the water surface.

Description

Technical Field

[0001] The present invention discloses a multi-layer depth positioning wireless transmission water quality sampler based on pressure detection, which relates to a sampler for layered positioning sampling of water quality in each water layer, and belongs to the technical field of water quality sampling, and particularly relates to a sampler that can control a rotating motor to release a connecting rope, and drive a sampling bottle to reach different depths to sample a specific water layer under the drive of a marker ball float. Each sampling bottle is independently filled with water through the opening and closing of an electric control valve, and water flow from other layers will not enter the sampling bottle in advance, and there is no need to empty the sampler. Background Art

[0002] When people treat river sewage, they need to conduct multiple sampling tests at different depths on the same river. After multiple samplings, the content of various components in the water flow is determined, so as to treat the sewage. In the prior art, the most commonly used method for sampling river water is to sample river water through a water pump. The inlet end of the water pump is connected to a water pipe, and a weight is installed at the other end of the water pipe. The water pipe is marked with a scale. The water outlet end of the water pump is connected to a sampling bottle through the water pipe. When in use, people put the water pipe into the river and make the water pipe flow through the scale. The pipe mouth reaches the appropriate depth, and then sampling is carried out through a water pump. In order to ensure accurate sampling, people generally have to sample multiple water layers in the same river channel multiple times. Each time sampling is carried out, the water pipe must be lowered to the appropriate depth for sampling. In the process of lowering the water pipe, water in other layers will enter the water pipe. When sampling, it is necessary to pump water for a period of time, and then discharge the river water that enters the predetermined water layer during the water pipe entering the predetermined water layer before sampling. The sampling time is long, and it is easy to sample without emptying the water completely, which affects the sampling accuracy.

[0003] Publication No. CN106908279B discloses a water quality sampler for environmental monitoring, comprising a gripping rod, a bottle clamp and a sampling bottle, the gripping rod is connected to the bottle clamp, the bottle clamp clamps the sampling bottle, the sampling bottle body is placed horizontally perpendicular to the gripping rod, a pull wire wheel is provided on the gripping rod, a pull wire is wound around the pull wire wheel, the free end of the pull wire is connected to one end of the sampling bottle, the pull wire is used to tilt the sampling bottle; the bottle clamp can rotate in a horizontal plane relative to the gripping rod; the sampling bottle can rotate in a vertical plane relative to the bottle clamp. In order to ensure that no debris enters the sampling bottle during use, the sampling bottle needs to be taken out of the water after a sampling is completed. The sampling bottle needs to be lowered to an appropriate depth for sampling each time. The work is repeated for multiple samplings, and in the process of lowering the sampling bottle, water in other layers will enter the sampling bottle. When sampling, it is necessary to pump water for a period of time, and then discharge the river water that enters the sampling bottle in the process of entering the predetermined water layer before sampling. The sampling time is long, and it is easy to sample without emptying the bottle completely.

[0004] Publication No. CN216207776U discloses a retractable water quality sampler, comprising: a cover body, a sampling main body and a water inlet pipe; the sampling main body is composed of a multi-layer tubular sleeve, the diameters of the outermost sleeve to the innermost sleeve decrease successively, a clearance fit is formed between the multi-layer sleeves, the multi-layer sleeves form a multi-stage telescopic structure, and the telescopic movement of the sleeves can change the volume of the water quality sampler; the top of the outermost sleeve is a water outlet, and the top of the outermost sleeve is detachably sealed and connected to the cover body, and the bottom of the innermost sleeve is connected to the water inlet pipe; the sampler needs to be connected to the water inlet pipe to sample water, and each time sampling is performed, the water pipe must be lowered to a suitable depth for sampling. During the process of lowering the water pipe, water in other layers will enter the water pipe. During sampling, it is necessary to pump water for a period of time, and the river water entering the water pipe during the process of entering the predetermined water layer must be discharged before sampling. The sampling time is long, and it is easy to sample without emptying the water, which affects the sampling accuracy. Summary of the invention

[0005] In order to improve the above situation, the present invention provides a water quality sampler based on pressure detection and multi-layer depth positioning wireless transmission, which uses the transmission of water pressure signals to control the rotating motor to intermittently rotate and release the connecting rope, and the sampling bottle reaches different depths for sampling under the drive of the marker ball float. Each sampling bottle is independently filled with water through the opening and closing of the electric control valve, and the water flow of other layers will not enter the sampling bottle in advance, and there is no need to empty it.

[0006] The present invention is a water quality sampler based on pressure detection and multi-layer depth positioning wireless transmission. The water quality sampler based on pressure detection and multi-layer depth positioning wireless transmission is realized as follows: The present invention is a water quality sampler based on pressure detection and multi-layer depth positioning wireless transmission. It includes a support component, a sampling component and a retractable component.

[0007] The invention is characterized in that the retractable assembly is arranged on the supporting assembly, and is used to intermittently start the rope release during the sampling process, so that the sampling assembly can reach a specific pressure-sensitive water layer. The sampling assembly is arranged on the retractable assembly, and is used to perform multiple non-drainage sampling of different water layers in the same river channel.

[0008] The retractable assembly is provided with a winding structure, which keeps the rope in an intermittent state before reaching the sampling water layer, so that the sampling assembly enters the corresponding sampling layer for sampling. After the sampling is completed, the rope is released again to send the sampling assembly to the water surface.

[0009] The sampling assembly is provided with a plurality of independently opened and closed sampling structures. After the sampling water layer reaches a specific pressure, the corresponding sampling structure opens and closes for sampling.

[0010] The support assembly is composed of a counterweight body, a connecting block, a fixing claw and a fixing plug column.

[0011] One end of the connection block is placed at the lower end of the counterweight body, and the other end of the connection block is provided with a fixed plug.

[0012] Preferably, the counterweight body is a conical structure, and the connecting block is a conical structure, which can reduce the water resistance during the descent process.

[0013] Preferably, a fixing claw is disposed between the connection block and the fixing plug column, and the fixing claw is bent upward in an arc shape from one end to the other end. There are a plurality of fixing claws, and the plurality of fixing claws are arranged equidistantly along the circumferential direction of the connection between the connection block and the fixing plug column.

[0014] The sampling assembly is composed of a sampling support column, a sampling bottle, a marker ball, a first connecting rope, a threaded hole and a sampling support column placement groove.

[0015] A sampling support column placement slot is provided at the upper end of the counterweight body, and a sampling support column is built into the sampling support column placement slot.

[0016] A threaded hole is provided in the sampling support column, and a sampling bottle is built into the threaded hole and is screwed to the threaded hole.

[0017] Preferably, there are at least three sampling bottles, and the at least three sampling bottles are arranged equidistantly along the circumference of the sampling support column.

[0018] Preferably, the height of the middle portion of the upper end surface of the sampling support column is higher than the height of the edge, forming an arched protrusion.

[0019] Preferably, one end of the sampling bottle is flush with the upper end surface of the sampling support column, and the other end of the sampling bottle extends through the threaded hole to the outside of the sampling support column.

[0020] The first connecting rope is placed on the upper end of the sampling support column, and the marker ball is placed on the first connecting rope.

[0021] Preferably, the marker ball is a hollow structure, and the density of the marker ball is less than the density of water.

[0022] Preferably, the surface of the marker ball is coated with fluorescent powder.

[0023] The marker ball is equipped with a positioning device to facilitate the recovery of samples on the water surface after sampling.

[0024] The retractable assembly is composed of a rotating motor, a second connecting rope, a rotating motor placement slot and a receiving slot.

[0025] A rotating motor placement slot is provided in the counterweight body, and a rotating motor is built in the rotating motor placement slot.

[0026] A receiving groove is provided in the counterweight body, and the motor shaft end of the rotating motor passes through the sealed bearing on the groove wall of the receiving groove and extends into the receiving groove.

[0027] One end of the second connecting rope is wound around the rotating motor shaft of the rotating motor, and the other end of the second connecting rope is placed at the lower end of the sampling support column;

[0028] Preferably, a pressure sensor is disposed on the sampling support column, an electric control valve is disposed at the mouth of the sampling bottle, a signal converter is built into the counterweight body, a data processor is built into the counterweight body, and a controller is built into the counterweight body.

[0029] Preferably, the pressure sensor and the signal converter perform data communication via a wireless communication module, the data processor and the signal converter perform data communication via a wireless communication module, the controller and the data processor perform data communication via a wireless communication module, and the rotating motor, the electric control valve and the controller perform data communication via a wireless communication module.

[0030] The pressure sensor detects the pressure of different water layers and transmits the pressure signal to the signal converter.

[0031] The data processor stores a computer program, which, when executed, implements the following steps:

[0032] When the pressure data does not reach the threshold, the data processor sends an instruction to the controller, and the controller controls the rotary motor to rotate to release the second connecting rope, while the electric control valve does not work;

[0033] When the pressure data reaches the threshold range, the data processor sends a command to the controller, and the controller controls the rotating motor to stop rotating, the second connecting rope remains unchanged, and controls the corresponding electric control valve within the pressure range to open, and the sampling bottle takes samples;

[0034] Furthermore, a water-breaking cover is disposed at the upper end of the sampling support column. The water-breaking cover is a truncated cone-shaped structure with an upper opening. The diameter of the lower end of the water-breaking cover is the same as the diameter of the upper end of the sampling support column. The lower end of the water-breaking cover is a strip-shaped water trough.

[0035] Furthermore, a filter plate is placed on the sampling bottle, the cross section of the filter plate is an upwardly convex arc structure, and the filter plate fits with the mouth of the sampling bottle. Beneficial Effects

[0036] 1. By intermittently releasing the connecting rope, multiple sampling bottles in the sampling support column can reach different depths, which is convenient for multiple sampling of different water layers in the same river channel.

[0037] 2. Each sampling bottle is independently filled with water through the opening and closing of the electronically controlled valve. The water flow from other layers will not enter the sampling bottle in advance and there is no need to empty it.

[0038] 3. Simple structure, convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a three-dimensional structural diagram of a water quality sampler based on pressure detection, multi-layer depth positioning and wireless transmission of the present invention;

[0040] Figure 2 It is a structural schematic diagram of a wireless transmission water quality sampler based on pressure detection and multi-layer depth positioning according to the present invention;

[0041] Figure 3 It is a three-dimensional structural diagram of Embodiment 2 of a wireless transmission water quality sampler based on pressure detection and multi-layer depth positioning of the present invention;

[0042] Figure 4 This is a structural schematic diagram of Example 3 of a wireless transmission water quality sampler based on pressure detection and multi-layer depth positioning according to the present invention.

[0043] Attached photos

[0044] Including: counterweight body 1, sampling support column 2, sampling bottle 3, marker ball 4, first connecting rope 5, connecting block 6, fixing claw 7, rotating motor 8, threaded hole 9, second connecting rope 10, fixing column 11, sampling support column placement slot 12, rotating motor placement slot 13, receiving slot 14, water breaking cover 15, filter plate 16. DETAILED DESCRIPTION

[0045] Example

[0046] The present invention discloses a wireless transmission water quality sampler based on pressure detection and multi-layer depth positioning, which comprises a support component, a sampling component and a retractable component.

[0047] The invention is characterized in that the retractable assembly is arranged on the supporting assembly, and is used to intermittently start the rope release during the sampling process, so that the sampling assembly can reach a specific pressure-sensitive water layer. The sampling assembly is arranged on the retractable assembly, and is used to perform multiple non-drainage sampling of different water layers in the same river channel.

[0048] The retractable assembly is provided with a winding structure, which keeps the rope in an intermittent state before reaching the sampling water layer, so that the sampling assembly enters the corresponding sampling layer for sampling. After the sampling is completed, the rope is released again to send the sampling assembly to the water surface.

[0049] The sampling assembly is provided with a plurality of independently opened and closed sampling structures. After the sampling water layer reaches a specific pressure, the corresponding sampling structure opens and closes for sampling.

[0050] The support assembly is composed of a counterweight body 1, a connecting block 6, a fixing claw 7 and a fixing plug 11.

[0051] One end of the connection block 6 is placed at the lower end of the counterweight body 1, and the other end of the connection block 6 is provided with a fixing plug 11.

[0052] Preferably, the counterweight body 1 is a conical structure, and the connecting block 6 is a conical structure, which can reduce the water resistance during the descent process.

[0053] Preferably, a fixing claw 7 is disposed between the connecting block 6 and the fixing plug 11, and the fixing claw 7 is bent upward in an arc shape from one end to the other end. There are multiple fixing claws 7, and the multiple fixing claws 7 are arranged equidistantly along the circumferential direction of the connection between the connecting block 6 and the fixing plug 11.

[0054] The sampling assembly is composed of a sampling support column 2, a sampling bottle 3, a marker ball 4, a first connecting rope 5, a threaded hole 9 and a sampling support column placement slot 12.

[0055] A sampling support column placement slot 12 is formed at the upper end of the counterweight body 1, and a sampling support column 2 is built into the sampling support column placement slot 12.

[0056] A threaded hole 9 is formed in the sampling support column 2, and a sampling bottle 3 is built into the threaded hole 9 and is screwed to the threaded hole 9.

[0057] Preferably, there are at least three sampling bottles 3, and the at least three sampling bottles 3 are arranged equidistantly along the circumference of the sampling support column 2.

[0058] Preferably, the height of the middle portion of the upper end surface of the sampling support column 2 is higher than the height of the edge, forming an arched protrusion.

[0059] Preferably, one end of the sampling bottle 3 is flush with the upper end surface of the sampling support column 2, and the other end of the sampling bottle 3 passes through the threaded hole 9 and extends to the outside of the sampling support column 2.

[0060] The first connecting rope 5 is placed on the upper end surface of the sampling support column 2, and the marker ball 4 is placed on the first connecting rope 5.

[0061] Preferably, the marker ball 4 is a hollow structure, and the density of the marker ball 4 is less than the density of water.

[0062] Preferably, the surface of the marker ball 4 is coated with fluorescent powder.

[0063] The marker ball 4 is equipped with a positioning device to facilitate the recovery of samples on the water surface after sampling.

[0064] The retractable assembly is composed of a rotating motor 8, a second connecting rope 10, a rotating motor placement slot 13 and a receiving slot 14.

[0065] A rotating motor placement slot 13 is provided in the counterweight body 1, and the rotating motor placement slot 13 is provided with a rotating motor 8.

[0066] A receiving groove 14 is formed in the counterweight body 1, and the motor shaft end of the rotating motor 8 passes through the sealed bearing on the groove wall of the receiving groove 14 and extends into the receiving groove 14.

[0067] One end of the second connecting rope 10 is wound around the rotating motor 8 shaft of the rotating motor 8, and the other end of the second connecting rope 10 is placed at the lower end of the sampling support column 2;

[0068] Preferably, a pressure sensor is disposed on the sampling support column 2, an electric control valve is disposed at the mouth of the sampling bottle 3, a signal converter is built into the counterweight body 1, a data processor is built into the counterweight body 1, and a controller is built into the counterweight body 1.

[0069] Preferably, the pressure sensor and the signal converter perform data communication through a wireless communication module, the data processor and the signal converter perform data communication through a wireless communication module, the controller and the data processor perform data communication through a wireless communication module, and the rotating motor 8 performs data communication with the electric control valve and the controller through a wireless communication module.

[0070] The pressure sensor detects the pressure of different water layers and transmits the pressure signal to the signal converter through the wireless communication module. After the signal converter converts the pressure signal into a digital signal, the pressure digital signal is transmitted to the data processor through the wireless communication module.

[0071] The data processor stores a computer program, which, when executed, implements the following steps:

[0072] When the pressure data does not reach the threshold, the data processor sends a command to the controller, and the controller controls the rotary motor 8 to rotate to release the second connecting rope 10, while the electric control valve does not work;

[0073] When the pressure data reaches the threshold range, the data processor sends an instruction to the controller, and the controller controls the rotating motor 8 to stop rotating, the second connecting rope 10 remains unchanged, and controls the corresponding electric control valve within the pressure range to open, and the corresponding sampling bottle 3 is sampled. After a period of time (1-3 minutes after the calculated water inflow time of the sampling bottle), the electric control valve is controlled to close, the rotating motor 8 starts to release the rope, and the sampling support column continues to rise;

[0074] Preferably, there are multiple sampling water layers, and the multiple sampling water layers of different depths correspond to different pressure value ranges, and different pressure value ranges correspond to different electrically controlled valves. When the sampling support column 2 reaches a specific sampling water layer, the pressure sensor senses the corresponding pressure value, and transmits the pressure signal to the signal converter through the wireless transmission module. After the signal converter converts the pressure signal into a digital signal, the pressure is digitally transmitted to the data processor through the wireless communication module. After receiving the pressure data, the data processor finds the corresponding electrically controlled valve through the calculation program, and sends an instruction to the controller through the wireless communication module, so that the controller controls the rotating motor 8 to stop rotating, the second connecting rope 10 remains unchanged, and controls the corresponding electrically controlled valve within the pressure range to open, and the corresponding sampling bottle 3 is sampled.

[0075] When in use, place the counterweight body 1 and its components in the detection water area, use the pushing equipment to push the counterweight body 1 to the bottom of the water, drive the fixed plug column 11 and the connecting block 6 to extend into the riverbed, and the fixed claw 7 increases the overall grip to ensure the stability of the counterweight body 1. The pressure sensor detects the pressure in the water and transmits the pressure signal to the signal converter. When the pressure data does not reach the threshold range, the data processor sends an instruction to the controller, and the controller controls the rotating motor 8 to rotate and release the second connecting rope 10. The sampling support column 2 floats up under the drive of the marker ball 4, and the electric control valve does not work; when the pressure data reaches the threshold, the data processor The device sends a command to the controller, and the controller controls the rotating motor 8 to stop rotating, the second connecting rope 10 remains unchanged, and controls the corresponding electric control valve within the pressure range to open, and the sampling bottle 3 is sampled. It can be sampled multiple times for different water layers in the same river. After the sampling is completed, the rotating motor 8 rotates again to release the second connecting rope 10, and driven by the marker ball 4, the sampling support column 2 is sent to the water surface. The marker ball 4 on the first connecting rope 5 floats on the water surface, and the positioner arranged inside it sends the positioning, which is convenient for recovering the sample, and the sampling bottle 3 is taken out from the threaded hole 9, and a new sampling bottle 3 is put in again to carry out the next stage of sampling; Example

[0076] The difference between this embodiment and embodiment 1 is that: a water-breaking cover 15 is disposed at the upper end of the sampling support column 2, and the water-breaking cover 15 is a truncated cone-shaped structure with an upper end opening, and the diameter of the lower end of the water-breaking cover 15 is the same as the diameter of the upper end of the sampling support column 2, and the lower end of the water-breaking cover 15 is a strip-shaped water-passing groove; when in use, the water-breaking cover 15 can reduce the resistance of the sampling support column 2 during the floating process, and the strip-shaped water-passing groove can prevent the water of the remaining water layer from being retained near the sampling bottle 3 and affecting the sampling accuracy; Example

[0077] The difference between this embodiment and embodiment 1 is that: a filter plate 16 is placed on the sampling bottle 3, and the filter plate 16 is an arc-shaped structure, and the filter plate 16 fits the mouth of the sampling bottle 3; when in use, the filter plate 16 can be used to block the solid impurities in the detection water layer to prevent the sampling bottle 3 from being blocked and affecting the sampling;

[0078] The sampling support column 2 is designed to fix the sampling bottle 3 with the threaded hole 9, so that the sampling bottle 3 can be easily taken out after the sampling is completed. Compared with the plug-in connection method, the sampling bottle 3 is screwed into the threaded hole 9, which can make the installation of the sampling bottle 3 more stable and prevent the sampling bottle 3 from falling off when the sampling support column 2 floats to the specified water layer, which affects the sampling.

[0079] The height of the middle part of the upper end surface of the sampling support column 2 is higher than the height of the edge, forming an arched convex design, which can reduce the water resistance during the floating process of the sampling support column 2, and at the same time can prevent water from other water layers from remaining on the sampling support column 2 to affect the sampling accuracy of the sampling bottle 3;

[0080] One end of the sampling bottle 3 is flush with the upper end surface of the sampling support column 2, and the other end of the sampling bottle 3 is designed to extend to the outside of the sampling support column 2 through the threaded hole 9. The upper end surfaces are flush, which can prevent water from other water layers from being retained on the sampling bottle 3. The portion of the sampling bottle 3 protruding from the sampling support column 2 can facilitate holding the sampling bottle 3 to take out the sampling bottle 3, and the protruding portion allows a gap between the sampling support column 2 and the sampling support column placement groove 12 for water to pass through, thereby preventing the sampling support column 2 and the sampling support column placement groove 12 from being unable to be separated due to water pressure, thereby affecting sampling;

[0081] The marker ball 4 is a hollow structure. The density of the marker ball 4 is less than the density of water. It can drive the sampling support column 2 to float to the specified water layer during the process of the rotating motor 8 rotating the rope, so as to facilitate the sampling of the sampling bottle 3.

[0082] The design of coating the surface of the marker ball 4 with fluorescent powder enables the sampling personnel to quickly find the location of the marker ball 4 after the marker ball 4 floats to the surface of the water after sampling, thus shortening the sampling time;

[0083] There are at least three sampling bottles 3, and at least three sampling bottles 3 are arranged equidistantly along the circumference of the sampling support column 2. The electrically controlled valves can be used to control the independent opening and closing of multiple sampling bottles 3, so as to achieve multiple sampling of different water layers in the same river in a short time;

[0084] The rotating motor 8 cooperates with the second connecting rope 10, and can drive the second connecting rope 10 on the shaft of the rotating motor 8 through the rotating motor 8 to send the sampling support column 2 to the corresponding water layer under the drive of the marker ball 4, so that the sampling support column 2 can reach different depths and facilitate multiple sampling;

[0085] The fixing claw 7 cooperates with the connecting block 6 to deliver the whole sample to the bottom of the water through the counterweight body 1. The connecting block 6 stabilizes the counterweight body 1, thereby increasing the stability of the supporting assembly and preventing the counterweight body 1 from shifting when the rotating motor 8 releases the rope for sampling, thereby affecting the sampling depth and increasing the difficulty of multiple sampling.

[0086] The connecting rope can be driven to rotate by the rotating motor 8, thereby driving the sampling support column 2 to reach different depths. Each sampling bottle 3 is independently filled with water through the opening and closing of the electric control valve. The water flow of other layers will not enter the sampling bottle 3 in advance, and the purpose of emptying the sample is not required.

[0087] It should be noted that, unless otherwise clearly specified and limited, the terms "placed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection method such as a folding connection, a rivet connection, a pin connection, a bonding connection and a welding connection, or a detachable connection method such as a threaded connection, a snap connection and a hinge connection, or an integral connection, or an electrical connection, or a direct connection, or an indirect connection through an intermediate medium, or the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0088] It should be further pointed out that, when describing the above specific embodiments, for the sake of simplicity and clarity, only the differences between the above specific embodiments are described, but those skilled in the art should know that the above specific embodiments themselves are also independent technical solutions.

Claims

1. A multi-layer depth positioning wireless transmission water quality sampler based on pressure detection, comprising a support component, a sampling component and a retractable component, characterized in that: The retractable assembly is arranged on the support assembly, and is used to intermittently start the rope release during the sampling process, so that the sampling assembly can reach a specific pressure-sensitive water layer. The sampling assembly is arranged on the retractable assembly, and is used to perform multiple non-drainage sampling of different water layers in the same river channel. The retractable assembly is provided with a winding structure, and the rope release state is maintained intermittently before reaching the sampling water layer, so that the sampling assembly enters the corresponding sampling layer for sampling. After the sampling is completed, the rope is released again to send the sampling assembly to the water surface. The sampling assembly is provided with a plurality of independently openable and closed sampling structures. After reaching the sampling water layer of a specific pressure, the corresponding sampling structure is opened and closed for sampling. The sampling assembly is composed of a sampling support column (2). The weight body (1) is composed of a sampling bottle (3), a marking ball (4), a first connecting rope (5), a threaded hole (9) and a sampling support column placement groove (12). The upper end of the counterweight body (1) is provided with a sampling support column placement groove (12). The sampling support column (2) is provided with a threaded hole (9). The threaded hole (9) is provided with a sampling bottle (3) and is threadedly connected to the threaded hole (9). The first connecting rope (5) is placed on the upper end surface of the sampling support column (2). The marking ball (4) is placed on the first connecting rope (5). The marking ball (4) is provided with a positioning device that can be positioned to facilitate the recovery of samples on the water surface after sampling. The placing assembly is composed of a rotating motor (8), a second connecting rope (10), a rotating motor placing groove (13) and a receiving groove (14); a rotating motor placing groove (13) is provided in a counterweight body (1), a rotating motor (8) is internally contained in the rotating motor placing groove (13); a receiving groove (14) is provided in the counterweight body (1); a motor shaft end of the rotating motor (8) passes through a sealed bearing on a groove wall of the receiving groove (14) and extends into the receiving groove (14); one end of the second connecting rope (10) is wound around the rotating motor (8) shaft of the rotating motor (8); the other end of the second connecting rope (10) is placed at the lower end of a sampling support column (2); the supporting assembly is composed of The counterweight body (1) is composed of a counterweight body (1), a connecting block (6), a fixing claw (7) and a fixing plug column (11), one end of the connecting block (6) is placed at the lower end of the counterweight body (1), and the other end of the connecting block (6) is provided with a fixing plug column (11). The counterweight body (1) is a conical structure, and the connecting block (6) is a conical structure, which can reduce the water resistance during the descent process. A fixing claw (7) is placed between the connecting block (6) and the fixing plug column (11), and the fixing claw (7) is bent upward in an arc shape from one end to the other end. There are multiple fixing claws (7), and the multiple fixing claws (7) are arranged equidistantly along the circumferential connection between the connecting block (6) and the fixing plug column (11).

2. According to claim 1, a wireless transmission water quality sampler based on pressure detection and multi-layer depth positioning is characterized in that A water-breaking cover (15) is disposed at the upper end of the sampling support column (2); the water-breaking cover (15) is a truncated cone-shaped structure with an open upper end; the diameter of the lower end of the water-breaking cover (15) is the same as the diameter of the upper end of the sampling support column (2); and the lower end of the water-breaking cover (15) is a strip-shaped water trough.

3. According to claim 1, a wireless transmission water quality sampler based on pressure detection and multi-layer depth positioning is characterized in that A filter plate (16) is placed on the sampling bottle (3); the cross section of the filter plate (16) is an upwardly convex arc structure; the filter plate (16) fits in place with the mouth of the sampling bottle (3).

4. According to claim 1, a wireless transmission water quality sampler based on pressure detection and multi-layer depth positioning is characterized in that The marker ball (4) is a hollow structure, and the density of the marker ball (4) is less than the density of water.

5. A wireless transmission water quality sampler based on pressure detection and multi-layer depth positioning according to claim 1 or 4, characterized in that The surface of the marker ball (4) is coated with fluorescent powder.

6. The wireless transmission water quality sampler based on pressure detection and multi-layer depth positioning according to claim 1 is characterized in that There are at least three sampling bottles (3), and the at least three sampling bottles (3) are arranged equidistantly along the circumference of the sampling support column (2).

7. The wireless transmission water quality sampler based on pressure detection and multi-layer depth positioning according to claim 1 is characterized in that The height of the middle part of the upper end surface of the sampling support column (2) is higher than the height of the edge, forming an arched protrusion.

8. A wireless transmission water quality sampler based on pressure detection and multi-layer depth positioning according to claim 1 or 6, characterized in that One end of the sampling bottle (3) is flush with the upper end surface of the sampling support column (2), and the other end of the sampling bottle (3) passes through the threaded hole (9) and extends to the outside of the sampling support column (2).

9. The wireless transmission water quality sampler based on pressure detection and multi-layer depth positioning according to claim 1 is characterized in that The sampling support column (2) is provided with a pressure sensor, the sampling bottle (3) is provided with an electric control valve at the bottle mouth, the counterweight body (1) is provided with a built-in signal converter, the counterweight body (1) is provided with a built-in data processor, the counterweight body (1) is provided with a built-in controller, the pressure sensor and the signal converter perform data communication via a wireless communication module, the data processor and the signal converter perform data communication via a wireless communication module, the controller and the data processor perform data communication via a wireless communication module, the rotating motor (8) performs data communication with the electric control valve and the controller via a wireless communication module, the pressure sensor detects the pressure of different water layers and transmits the pressure signal to the signal converter via the wireless communication module, the signal converter converts the pressure signal into a digital signal, and transmits the pressure digital signal to the data processor via the wireless communication module, the data processor stores a computer program, and the following steps are implemented when the program is executed: when the pressure data does not reach a threshold value, the data processor sends an instruction to the controller, and the controller controls the rotating motor (8) to rotate and release the second connection The second connecting rope (10) is connected to the sampling support column (2), and the electric control valve does not work; when the pressure data reaches the threshold range, the data processor sends an instruction to the controller, the controller controls the rotating motor (8) to stop rotating, the second connecting rope (10) remains unchanged, and controls the corresponding electric control valve within the pressure range to open, and the sampling bottle (3) performs sampling; there are multiple sampling water layers, and the sampling water layers of different depths correspond to different pressure value ranges, and the different pressure value ranges correspond to different electric control valves. When the sampling support column (2) reaches a specific sampling water layer, the pressure sensor senses the corresponding pressure value and transmits the pressure signal to the signal converter through the wireless transmission module. After the signal converter converts the pressure signal into a digital signal, the pressure digital signal is transmitted to the data processor through the wireless communication module. After receiving the pressure data, the data processor finds the corresponding electric control valve through a calculation program and sends an instruction to the controller through the wireless communication module, so that the controller controls the rotating motor (8) to stop rotating, the second connecting rope (10) remains unchanged, and controls the corresponding electric control valve within the pressure range to open, and the sampling bottle (3) performs sampling.

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