A seawater physicochemical detection device and sampling device

Abstract

The application discloses a seawater physical and chemical detection device and a sampling device, which comprises a seawater sampling device and a seawater detection device; the seawater sampling device comprises a main rope, a counterweight, a float and two or more sampling tubes; each sampling tube is connected with the main rope by an upper float rope and a lower diving rope, so that the upper float rope and the lower diving rope drive the sampler to float or dive; the sampling tube is provided with a water inlet device, the water inlet device is connected with the upper float rope, and the water inlet device is triggered to open water inlet by the upper float rope; the application can avoid the entanglement of the sampling tube and the main rope; when the main rope is pulled upwards, the water inlet device can be triggered to open water inlet by the upper float rope, so that the water inlet can be automatically controlled when the sampling tube reaches a predetermined depth, the water inlet control structure is greatly simplified, and the water inlet control stability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of seawater physical and chemical detection, in particular to a seawater physical and chemical detection device and a sampling device. BACKGROUND

[0002] Seawater contains rich minerals, which is a true liquid mineral deposit. There are 3570 million tons of minerals in an average cubic kilometer of seawater, and 80% of them can be found in seawater. In order to understand the properties of seawater, it is necessary to conduct physical and chemical detection on seawater. And the water quality of seawater in different regions and depths is quite different, and a seawater sampler is an essential device for seawater physical and chemical detection.

[0003] And there are many marine microorganisms in seawater, and some of them have certain pathogenicity. At present, there are few studies on pathogenic bacteria in seawater, so there are few bases for the treatment of marine microorganism pathogenicity. Therefore, in order to study the pathogenic bacteria in seawater, seawater at different depths needs to be collected for detection.

[0004] The existing seawater sampling mainly includes a main rope and a sampling cylinder connected to the main rope, and can only sample seawater at a certain depth. In order to accurately sample seawater at a predetermined depth, a complex control valve needs to be arranged on the water inlet device of the sampling cylinder, and the wire of the control valve extends along the main rope to the sea surface and is connected to the controller. Long distance wire is not only easy to break, but also easy to control failure due to too long length. Therefore, how to quickly and conveniently collect seawater at a predetermined depth has become a technical problem that technicians in the field need to solve. SUMMARY

[0005] In view of the above problems, the present application provides a seawater physical and chemical detection device to solve the technical problems of inconvenient collection and detection of seawater at a predetermined depth.

[0006] To achieve the above purpose, the inventor provides a seawater physical and chemical detection device, which comprises a seawater sampling device and a seawater detection device.

[0007] The seawater detection device is used for physical and chemical detection of seawater sampled by the seawater sampling device.

[0008] The seawater sampling device comprises a main rope, a counterweight, a float and two or more sampling cylinders, the sampling cylinders are arranged at different depths on the main rope to obtain seawater at different depths.

[0009] The sampling cylinder comprises a cylinder body and a water inlet device arranged at the top of the cylinder body to introduce seawater into the inside of the cylinder body.

[0010] The barrel is a cylindrical structure, the top of the barrel is further provided with a handle, the top of the barrel is connected with the main rope through a floating rope, and the bottom of the barrel is connected with the main rope through a diving rope;

[0011] The floating rope and the diving rope are connected with the main rope through movable collars respectively, and two conical limiting blocks corresponding to the floating rope and the diving rope are arranged on the main rope at intervals;

[0012] The weight block is connected to the tail of the main rope, so that the main rope and the sampling barrel dive, and the float position is adjustably arranged on the main rope, so that the weight block and the sampling barrel dive to different predetermined depths;

[0013] When the weight block and the main rope dive, the conical limiting block corresponding to the diving rope is in contact with the movable collar on the diving rope, so as to drive the sampling barrel to dive;

[0014] When the weight block dives to the predetermined depth, the float pulls the main rope, so that the conical limiting block corresponding to the floating rope pulls the floating rope upwards, and the floating rope triggers the water inlet device to open.

[0015] In some technical solutions, the water inlet device comprises a valve body and a driving device; the valve body comprises a valve cavity and a diaphragm assembly, the diaphragm assembly is arranged in the valve cavity, and the diaphragm assembly can move in the valve cavity to make the valve body open or close;

[0016] The driving device comprises a movable rod and a spring, the movable rod is in contact with the spring, one end of the movable rod is connected with the floating rope, and the spring is used for applying elastic force to the movable rod and pointing to the diaphragm assembly; the floating rope drives the movable rod away from the diaphragm assembly to make the valve body open.

[0017] In some technical solutions, the water inlet device is a bistable water inlet device.

[0018] In some technical solutions, a one-way valve is further arranged in the water inlet channel of the water inlet device.

[0019] In some technical solutions, a depth scale is arranged on the main rope.

[0020] In some technical solutions, the barrel is made of stainless steel, and the floating rope and the diving rope are made of PE wire.

[0021] In some technical solutions, the seawater detection device comprises a leading filter screen and a physicochemical detection mechanism arranged at the rear end of the leading filter screen.

[0022] To solve the above technical problems, the application further provides a seawater sampling device, comprising a main rope, a counterweight, a float and two or more sampling cylinders arranged at different depths on the main rope to obtain seawater at different depths.

[0023] The sampling cylinder comprises a cylinder body and a water inlet device arranged at the top of the cylinder body to introduce seawater into the cylinder body.

[0024] The cylinder body is in a cylindrical structure, and a handle is arranged at the top of the cylinder body, the top of the cylinder body is connected with the main rope through an upper float rope, and the bottom of the cylinder body is connected with the main rope through a diving sub rope.

[0025] The upper float rope and the diving sub rope are connected with the main rope through movable grommets respectively, and two conical limiting blocks corresponding to the upper float rope and the diving sub rope are arranged on the main rope at intervals.

[0026] The counterweight is connected to the tail of the main rope to make the main rope and the sampling cylinder dive, and the float is arranged on the main rope in an adjustable manner to make the counterweight and the sampling cylinder dive to different predetermined depths.

[0027] When the counterweight and the main rope dive, the conical limiting block corresponding to the diving sub rope is in abutment with the movable grommet on the diving sub rope to drive the sampling cylinder to dive.

[0028] When the counterweight dives to a predetermined depth, the float pulls the main rope to make the conical limiting block corresponding to the upper float rope pull the upper float rope upward, and the upper float rope triggers the water inlet device to open.

[0029] In some technical solutions, the water inlet device comprises a valve body and a driving device; the valve body comprises a valve cavity and a diaphragm assembly, the diaphragm assembly is arranged in the valve cavity, and the diaphragm assembly can move in the valve cavity to make the valve body conduct or close;

[0030] The driving device comprises a movable rod and a spring, one end of the movable rod is in abutment with the spring, the other end of the movable rod is connected with the upper float rope, and the spring is used to apply a spring force to the movable rod and point to the diaphragm assembly; the upper float rope drives the movable rod to move away from the diaphragm assembly to make the valve body conduct.

[0031] In some technical solutions, a depth scale is arranged on the main rope.

[0032] Different from the prior art, the seawater sampling device comprises a main rope, a counterweight, a float and two or more sampling cylinders, the sampling cylinders are arranged on the main rope at different depths to obtain seawater at different depths; when sampling, the sampling cylinders are lowered by a lowering sub-rope and are raised by a raising sub-rope, so that the sampling cylinders can be lowered and raised smoothly and entanglement of the sampling cylinders with the main rope is avoided; the water inlet device is provided with a water inlet movable rod, when the device is lowered to a predetermined depth, the raising sub-rope generates an upward pulling force on the movable rod above the handle, so that the water inlet device is triggered to open the water inlet, therefore, the water inlet can be automatically controlled when the sampling cylinder reaches the predetermined depth, without the need of setting a water inlet electric control and wiring, the water inlet control structure is greatly simplified, and the water inlet control stability is improved.

[0033] The above invention content is only a summary of the technical scheme of the present application, in order to enable those skilled in the art to more clearly understand the technical scheme of the present application, and then can be implemented according to the content of the description and the drawings, and in order to make the above purpose and other purposes, characteristics and advantages of the present application more easily understood, the following is described in combination with the specific embodiments of the present application and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0034] The drawings are only used to show the principles, implementation modes, applications, characteristics and effects of the specific embodiments and other related contents of the present application, and cannot be considered as a limitation of the present application.

[0035] In the drawings of the specification:

[0036] Figure 1 The module block diagram of the seawater physicochemical detection device described in the specific embodiments;

[0037] Figure 2 The structural schematic diagram of the seawater sampling device described in the specific embodiments;

[0038] Figure 3 The structural schematic diagram of the sampling cylinder described in the specific embodiments;

[0039] Figure 4 The Figure 2 The local enlarged view of part A in the middle;

[0040] Figure 5 The sectional view of the water inlet device described in the specific embodiments;

[0041] Figure 6 The structural schematic diagram of the valve body described in the specific embodiments;

[0042] Figure 7 The exploded view of the valve body described in the specific embodiments;

[0043] The reference signs involved in the above drawings are explained as follows:

[0044] 100, sea water sampling device;

[0045] 200, sea water detection device;

[0046] 1, main rope; 11, counterweight; 12, buoy; 13, conical limiting block; 14, movable collar; 121, movable sleeve;

[0047] 2, sampling cylinder; 20, cylinder body; 21, upper float rope; 22, lower diving rope; 23, water inlet device; 24, handle; 25, connecting rope;

[0048] 231, housing; 2311, water inlet; 2312, water outlet; 2313, water inlet channel;

[0049] 230, valve body; 2301, upper cover; 2302, main body; 2303, movable rod; 2304, upper valve body; 2305, diaphragm; 2306, lower valve body; 2307, spring; DETAILED DESCRIPTION

[0050] In order to describe the possible application scenarios, technical principles, specific implementation schemes, and the purposes and effects that can be achieved of the present application in detail, the following will be described in detail in combination with the specific embodiments listed and the accompanying drawings. The embodiments described in this paper are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0051] In this paper, the term "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0052] Unless otherwise defined, the meaning of the technical terms used in this paper is the same as that generally understood by those skilled in the art to which the present application belongs; the use of related terms in this paper is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0053] In the description of the present application, the phrase "and / or" is a description of the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this paper generally represents that the associated objects before and after are a "or" logical relationship.

[0054] In the present application, the terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual number, primary or secondary, or order relationship between the entities or operations.

[0055] In the present application, the "includes", "contains", "has", or other similar open-ended expressions used in the statements are intended to cover non-exclusive inclusions, and these expressions do not exclude the presence of additional elements in the process, method or product comprising the elements, so that the process, method or product comprising a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0056] As the same understanding as in the "Guidelines for Examination", in the present application, the expressions such as "greater than", "less than", "exceed" are understood as not including the number; the expressions such as "above", "below", "within" are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times", etc., unless otherwise explicitly specified.

[0057] In the description of the embodiments of the present application, the spatial-related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. The indicated orientation or position relationship is based on the orientation or position relationship shown in the specific embodiment or the drawing, and is only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and does not indicate or imply that the indicated device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0058] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mount", "connect", "connect", "fix", "set", etc. should be understood in a broad sense. For example, the "connection" can be a fixed connection, or a detachable connection, or an integral setting; it can be a mechanical connection, or an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0059] Please refer to Figures 1 to 7 The embodiment provides a seawater physical and chemical detection device. The seawater physical and chemical detection device can realize seawater sampling at different depths and physical and chemical detection.

[0060] As shown in Figure 1 , the seawater physical and chemical detection device comprises a seawater sampling device 100 and a seawater detection device 200. The seawater detection device 200 is used for physical and chemical detection of seawater sampled by the seawater sampling device 100. The detection items of the physical and chemical detection include any one or a combination of two or more of pH, color, conductivity, total hardness, suspended solids, dissolved oxygen, chemical oxygen demand, biochemical oxygen demand, ammonia nitrogen, cyanide, volatile phenol, petroleum and animal and vegetable oil, sulfide, chloride, fluoride, sulfate, nitrate, etc. That is, the seawater physical and chemical detection device comprises a pH detector, a conductivity detector or other detection devices.

[0061] As shown in Figure 2 , the seawater sampling device 100 comprises a main rope 1, a counterweight 11, a float 12 and two or more sampling cylinders 2. As shown in Figure 3 , it is a structural diagram of the sampling cylinder 2; the sampling cylinder 2 is arranged at different depth positions of the main rope 1 to obtain seawater at different depths. The sampling cylinder 2 comprises a cylinder body 20 and a water inlet device 23 arranged at the top of the cylinder body to introduce seawater into the inside of the cylinder body; the cylinder body 20 is a cylindrical structure, which can be made of stainless steel, and has a cavity in the inside for containing seawater; the top of the cylinder body 20 is further provided with a handle 24, which is a U-shaped handle, and the two ends of the handle 24 are hinged to the cylinder body 20, so that the handle 24 can be rotated around the hinge. The top of the cylinder body is connected with the main rope 1 through an upper float rope 21, and the bottom of the cylinder body is connected with the main rope 1 through a lower diving rope 22. The upper float rope 21 is connected with the handle 24, and the handle 24 is connected with the water inlet device 23 through a connecting rope. In order to facilitate the pouring of seawater in the sampling cylinder, a water outlet is further arranged at the bottom or other positions of the sampling cylinder, and a water outlet valve is arranged on the water outlet.

[0062] As shown in Figure 2 and Figure 4 , the upper float rope 21 and the lower diving rope 22 are respectively connected with the main rope 1 through movable grommets 14, and two conical limiting blocks 13 corresponding to the upper float rope 21 and the lower diving rope 22 are arranged at intervals on the main rope 1. The maximum outer diameter of the conical limiting block 13 is greater than the inner diameter of the movable grommet 14, so that when the conical limiting block 13 moves with the main rope, it can abut against the movable grommet 14 and drive the lower diving rope 22 or the upper float rope 21 to move. In some embodiments, in order to reduce the water resistance and ensure the tensile strength of the rope, the upper float rope 21 and the lower diving rope 22 are made of PE wire.

[0063] As shown in Figure 2 The weight 11 is connected to the tail of the main rope 1, and can be made of high-density metal or alloy such as lead or tungsten, so as to make the main rope 1 and the sampling cylinder 2 dive. The float 12 is adjustably arranged on the main rope 1, so as to make the weight 11 and the sampling cylinder 2 dive to different predetermined depths. In some embodiments, a depth scale is arranged on the main rope 1 for the convenience of adjusting the depth.

[0064] The float 12 is connected to the main rope 1 through a movable sleeve 121 and a sub rope. The movable sleeve 121 is elastic and tightly wrapped around the main rope 1, so that the depth of the sampling cylinder above the weight 11 can be adjusted by moving the movable sleeve 121. The float 12 provides buoyancy, so that the main rope 1 and the sampling cylinder 2 and the weight 11 connected to the main rope 1 can be suspended in seawater, and under the action of the gravity of the weight 11, the bottom end of the main rope 1 and the sampling cylinder 2 can dive to a predetermined depth. When the weight 11 and the sampling cylinder 2 do not dive to the predetermined depth, the volume of the float submerged in seawater is small. When the weight 11 and the sampling cylinder 2 dive to the predetermined depth, the volume of the float submerged in seawater is large. Therefore, by observing the amount of the float submerged in seawater, it can be determined whether the weight 11 and the sampling cylinder 2 dive to the predetermined depth.

[0065] When the weight 11 and the main rope 1 dive, the conical limiting block 13 corresponding to the diving sub rope 22 is in abutment with the movable sleeve ring 14 on the diving sub rope 22, so as to drive the sampling cylinder 2 to dive. When the weight 11 dives to the predetermined depth, the float 12 pulls the main rope 1, so that the conical limiting block 13 corresponding to the floating sub rope 21 pulls the floating sub rope 21 upward, and the floating sub rope 21 triggers the water inlet device 23 to open.

[0066] When the weight 11 dives to the predetermined depth, the main rope 1 is pulled upward, and the pulling force of the upward pulling is applied to the movable sleeve ring 14 and the floating sub rope 21 through the conical limiting block, the floating sub rope 21 pulls the water inlet device 23, so that the water inlet device 23 opens to let water in. In this embodiment, the sampling cylinder 2 is connected to the main rope 1 by the diving sub rope 22 and the floating sub rope 21, and the diving sub rope 22 and the floating sub rope 21 respectively stretch the sampling cylinder 2 in opposite directions, so that the sampling cylinder 2 keeps parallel to the main rope 1 when moving, thereby reducing the water resistance and avoiding entanglement and knotting of the sampling cylinder 2 and the main rope 1.

[0067] As shown in Figure 5The figure shown is a cross-sectional view of the water inlet device 23 in the above embodiment. In some technical solutions, the water inlet device 23 includes a housing 231 and a valve body 230 disposed within the housing 231. The valve body 230 is connected to a drive device, which is used to drive the valve body 230 to open or close.

[0068] The housing 231 includes an inlet 2311, an outlet 2312, and an inlet channel 2313 connecting the inlet 2311 and the outlet 2312. The outlet 2312 is located inside the cylinder 20. During seawater sampling, the seawater enters the cylinder 20 sequentially through the inlet 2311, the inlet channel 2313, and the outlet 2312. The inlet channel 2313 can surround the outside of the valve body 230, meaning the inlet channel 2313 is integrally connected around the outside of the valve body 230 at a 360° angle. In the above embodiment, the valve body 230 is located inside the housing of the sensing water outlet device, and the inlet channel 2313 is arranged along the outside of the valve body 230, thereby greatly reducing the volume of the water inlet device.

[0069] like Figure 6 and Figure 7 As shown, the valve body 230 includes a valve cavity and a diaphragm assembly. The diaphragm assembly is disposed within the valve cavity and can move within the valve cavity to open or close the valve body 230. The valve body 230 includes an upper cover 2301 and a main body 2302, which together form the valve cavity. The diaphragm assembly is disposed within the main body 2302. The diaphragm assembly includes an upper valve body 2304, a diaphragm 2305, and a lower valve body 2306. The upper valve body 2304 has an upper valve cavity, and the lower valve body 2306 has a lower valve cavity. The upper valve body 2304 and the lower valve body 2306 are interconnected, forming a valve cavity. The edge of the diaphragm 2305 is fixed between the upper valve body 2304 and the lower valve body 2306.

[0070] The driving device includes a movable rod 2303 and a spring 2307. The movable rod 2303 abuts against the spring 2307. One end of the movable rod 2303 is connected to the upper float rope 21. The spring 2307 is used to apply a spring force to the movable rod 2303 pointing towards the diaphragm assembly. The upper float rope 21 drives the movable rod 2303 away from the diaphragm assembly, thereby opening the valve body 230.

[0071] The diaphragm 2305 and the upper valve body 2304 form a sealed chamber, the diaphragm 2305 is provided with a flow guide hole, the flow guide hole is communicated with the water inlet 2311 of the valve body, water flow can enter the sealed chamber through the flow guide hole, the top of the sealed chamber is provided with a pressure relief hole, the pressure relief hole is opposite to the end of the movable rod, when the pressure relief hole is closed, water flow enters the sealed chamber through the flow guide hole, and the water pressure in the sealed chamber rises (equal to the water pressure at the water inlet end), so that the diaphragm 2305 is driven to move downward by the water pressure, and the valve body is closed. When the pressure relief hole is opened by pulling the movable rod, the water flow in the sealed chamber is discharged through the pressure relief hole (the discharged water flow flows to the water outlet 2312 of the valve body), so that the water pressure in the sealed chamber is reduced, and the diaphragm 2305 moves upward, so that the valve body is conducted.

[0072] The pressure relief hole is controlled to be closed or conducted by the movable rod 2303, as shown in Figure 5 and Figure 7 The movable rod 2303 penetrates the top of the upper valve body 2304 into the upper valve chamber, the other end of the movable rod 2303 extends to the outside of the shell 231 and is connected with the connecting rope 25. One end of the spring 2307 is opposite to the other end of the spring 2307, and the other end of the spring 2307 is connected with the diaphragm 2305. When the movable rod moves downward under the tension of the spring 2307, the pressure relief hole is tightly plugged, the diaphragm 2305 moves downward, so that the valve body is closed, and vice versa. When the movable rod 2303 moves upward under the tension of the connecting rope, the pressure relief hole is conducted, the diaphragm 2305 moves upward, so that the valve body is conducted.

[0073] In some embodiments, the water inlet device 23 is a bistable water inlet device. In order to avoid the overflow of seawater in the sampling cylinder 2, a one-way valve is further arranged in the water inlet channel of the water inlet device 23.

[0074] In some technical solutions, the seawater detection device 200 comprises a front guide filter screen and a physicochemical detection mechanism arranged at the rear end of the front guide filter screen.

[0075] To solve the above technical problems, the application further provides a seawater sampling device 100, which comprises a main rope 1, a counterweight 11, a float 12 and two or more sampling cylinders 2 arranged at different depths on the main rope 1 to obtain seawater at different depths; the sampling cylinder 2 comprises a cylinder body and a water inlet device 23 arranged at the top of the cylinder body to introduce seawater into the cylinder body; the cylinder body is in a cylindrical structure, the top of the cylinder body is further provided with a handle 24, the top of the cylinder body is connected with the main rope 1 through an upper float rope 21, and the bottom of the cylinder body is connected with the main rope 1 through a lower diving rope 22; the upper float rope 21 and the lower diving rope 22 are connected with the main rope 1 through movable grommets 14 respectively, and two conical limiting blocks 13 corresponding to the upper float rope 21 and the lower diving rope 22 are arranged at intervals on the main rope 1; the counterweight 11 is connected to the tail of the main rope 1 to make the main rope 1 and the sampling cylinder dive, and the float 12 is arranged on the main rope 1 in an adjustable manner to make the counterweight 11 and the sampling cylinder 2 dive to different predetermined depths; when the counterweight 11 and the main rope 1 dive, the conical limiting block 13 corresponding to the lower diving rope 22 is in abutment with the movable grommet on the lower diving rope 22 to drive the sampling cylinder 2 to dive; when the counterweight 11 dives to the predetermined depth, the float 12 pulls the main rope 1 to make the conical limiting block 13 corresponding to the upper float rope 21 pull the upper float rope 21 upward, and the upper float rope 21 triggers the water inlet device 23 to open.

[0076] In some technical solutions, the water inlet device 23 comprises a valve body 230 and a driving device; the valve body 230 comprises a valve cavity and a diaphragm assembly arranged in the valve cavity, and the diaphragm assembly can move in the valve cavity to make the valve body 230 open or close;

[0077] The driving device comprises a movable rod 2303 and a spring 2307, one end of the movable rod 2303 is in abutment with the spring 2307, the other end of the movable rod 2303 is connected with the upper float rope 21, and the spring 2307 is used for applying a spring force to the movable rod 2303 and pointing to the diaphragm assembly; the upper float rope 21 drives the movable rod 2303 to move away from the diaphragm assembly to make the valve body 230 open.

[0078] In some technical solutions, the main rope 1 is provided with a depth scale.

[0079] The seawater sampling device 100 comprises a main rope 1, a weight 11, a float 12, and two or more sampling cylinders 2 arranged at different depths on the main rope 1 to obtain seawater at different depths; when diving for sampling, the sampling cylinders 2 are driven to dive by diving sub-ropes 22, and when floating, the sampling cylinders 2 are driven to float by floating sub-ropes 21, so that the sampling cylinders 2 can dive and float smoothly, avoiding entanglement of the sampling cylinders 2 with the main rope 1; the water inlet device 23 is provided with a water inlet movable rod 2303, when diving to a predetermined depth, the floating sub-rope 21 generates an upward pulling force on the movable rod 2303 above the handle 24, triggering the water inlet device 23 to open the water inlet, so that the water inlet can be automatically controlled when the sampling cylinder 2 reaches the predetermined depth, without the need to set up a water inlet electric control and wiring, greatly simplifying the water inlet control structure, and improving the water inlet control stability.

[0080] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of the present application, they do not limit the patent protection scope of the present application. Any technical solution obtained by replacing or modifying the equivalent structure or equivalent process based on the essential concept of the present application, using the content described in the specification and drawings of the present application, and directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of the present application.

Claims

1. A seawater physicochemical detection device, characterized in that, The application relates to a seawater sampling device and a seawater detection device. The seawater detection device is used for physical and chemical detection of seawater sampled by the seawater sampling device. The seawater sampling device comprises a main rope, a counterweight, a float and two or more sampling cylinders arranged at different depths of the main rope to obtain seawater at different depths. The sampling cylinder comprises a cylinder body and a water inlet device arranged at the top of the cylinder body to guide seawater into the cylinder body. The cylinder body is in a cylindrical structure, the top of the cylinder body is further provided with a handle, the handle is a U-shaped handle, both ends of the handle are hinged to the cylinder body, the top of the cylinder body is connected with the main rope through an upper float rope, the upper float rope is connected with the handle, the handle is connected with the water inlet device through a connecting rope, the bottom of the cylinder body is connected with the main rope through a diving rope. The upper float rope and the diving rope are respectively connected with the main rope through movable collars, two tapered limiting blocks corresponding to the upper float rope and the diving rope are arranged on the main rope at intervals; when diving, the sampling cylinder is driven to dive by the diving rope, and when floating, the sampling cylinder is driven to float by the upper float rope. The counterweight is connected to the tail of the main rope to drive the main rope and the sampling cylinder to dive, the float is arranged on the main rope in a position-adjustable mode to drive the counterweight and the sampling cylinder to dive to different predetermined depths. When the counterweight and the main rope dive, the tapered limiting block corresponding to the diving rope is abutted against the movable collar on the diving rope to drive the sampling cylinder to dive. When the counterweight dives to a predetermined depth, the main rope is pulled by the float, the tapered limiting block corresponding to the upper float rope is pulled upwards, the upper float rope triggers the water inlet device to open, and thus the water inlet device can be automatically controlled when the sampling cylinder reaches the predetermined depth. The water inlet device comprises a valve body and a driving device; the valve body comprises a valve cavity and a diaphragm assembly arranged in the valve cavity, the diaphragm assembly can move in the valve cavity to make the valve body conductive or closed; 2.The seawater physicochemical detection device according to claim 1, characterized in that, The driving device comprises a movable rod and a spring, one end of the movable rod is connected with the upper float rope, and the spring is used for applying elastic force to the movable rod and pointing to the diaphragm assembly; the upper float rope drives the movable rod to move away from the diaphragm assembly to make the valve body conductive. The water inlet device is a bistable water inlet device. 3.The seawater physicochemical detection device according to claim 2, characterized in that, A one-way valve is further arranged in the water inlet channel of the water inlet device.

4. The seawater physico-chemical detection device according to any one of claims 1-3, characterized in that, A depth scale is arranged on the main rope.

5. The seawater physicochemical detection device according to claim 1, characterized in that, The cylinder body is made of stainless steel, and the upper float rope and the diving rope are made of PE wire. 6.The seawater physicochemical detection device according to claim 1, characterized in that, The seawater detection device comprises a front guide filter screen and a physical and chemical detection mechanism arranged at the rear end of the front guide filter screen.

7. The seawater physico-chemical detection device according to claim 1, characterized in that, The application relates to a seawater sampling device and a seawater detection device.

8. A seawater sampling device, characterized by The seawater sampling device comprises a main rope, a counterweight, a float and two or more sampling cylinders arranged at different depths of the main rope to obtain seawater at different depths. The sampling cylinder comprises a cylinder body and a water inlet device arranged at the top of the cylinder body to guide seawater into the cylinder body. ​ The barrel is a cylindrical structure, and a handle is arranged on the top of the barrel, the handle is a U-shaped handle, two ends of the handle are hinged to the barrel, the top of the barrel is connected with the main rope through an upper float rope, the upper float rope is connected with the handle, and the handle is connected with the water inlet device through a connecting rope; The upper float rope and the diving rope are connected with the main rope through movable collars respectively, two tapered limiting blocks corresponding to the upper float rope and the diving rope are arranged on the main rope at intervals, and the sampling barrel is driven to dive by the diving rope and to float up by the upper float rope during diving and floating up respectively. The counterweight is connected to the tail of the main rope, so that the main rope and the sampling barrel dive, and the float is arranged on the main rope in a position-adjustable mode, so that the counterweight and the sampling barrel dive to different predetermined depths. When the counterweight and the main rope dive, the tapered limiting block corresponding to the diving rope is in abutment with the movable collar on the diving rope, so as to drive the sampling barrel to dive. When the counterweight dives to a predetermined depth, the main rope is pulled by the float, the tapered limiting block corresponding to the upper float rope is pulled upward by the upper float rope, and the upper float rope triggers the water inlet device to open, so that the water inlet can be automatically controlled when the sampling barrel reaches the predetermined depth.

9. The seawater sampling device of claim 8, wherein, The water inlet device comprises a valve body and a driving device, the valve body comprises a valve cavity and a diaphragm assembly, the diaphragm assembly is arranged in the valve cavity, and the diaphragm assembly can move in the valve cavity to make the valve body open or close; The driving device comprises a movable rod and a spring, one end of the movable rod is in abutment with the spring, the other end of the movable rod is connected with the upper float rope, and the spring is used for applying elastic force to the movable rod and pointing to the diaphragm assembly; the upper float rope drives the movable rod to move away from the diaphragm assembly, so that the valve body is open.

10. The seawater sampling device of claim 8, wherein, A depth scale is arranged on the main rope.

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