A portable water sampling device for field use

Abstract

This utility model discloses a portable water sampling device for field use, including a control rod, a pressure chamber, a main rod, a sample bottle pin, a connecting bracket, an inner cylinder, an outer cylinder, and a sampling bottle. The bottom of the control rod is slidably connected to the pressure chamber. The main rod and the sample bottle pin are both tubular structures. The pressure chamber, main rod, and sample bottle pin are connected sequentially from top to bottom and are interconnected. One end of the connecting bracket is connected to the main rod, and the other end is connected to the inner cylinder. The inner cylinder is slidably connected to the inside of the outer cylinder, and the sampling bottle is located inside the inner cylinder. The inner cylinder has a first one-way water inlet grille on its side wall and a first retainer on its top. The sampling bottle has a second one-way water inlet grille on its side wall and a second retainer on its top. The first and second one-way water inlet grilles are positioned opposite each other, and the first and second retainers are movably connected together. The sample bottle pin passes through the first and second retainers and extends into the sampling bottle. The above device is simple, portable, convenient, and safe to use.

Description

Technical Field

[0001] The utility model relates to a field portable water sampling device, belonging to the technical field of field water sampling. Background Art

[0002] Effectively collecting water samples in the field and analyzing various water quality indicators can achieve the purpose of water environment monitoring and effectively control water pollution to a certain extent.

[0003] At present, the field water sample extraction method generally uses a 100-500ml water sample bottle to directly immerse in the water sampling area for collection, which is difficult for quantitative extraction of water samples of different water depths. At the same time, the existing water sampling method has the situation of secondary migration and storage of water samples, which is easy to cause water sample pollution in the process and affect water quality monitoring. The patent with application number 202122407547.1 discloses a water sampling device based on environmental detection, including a water sampling device body, a water inlet interface, a water outlet interface, a water inlet pipe, a water outlet pipe, a sealing ring, a main shaft, an impeller and a handle, wherein the water inlet interface is connected to the left side of the water sampling device body, the water outlet interface is connected to the right side of the water sampling device body, the water inlet pipe is connected to the surface of the water inlet interface, the water outlet pipe is connected to the surface of the water outlet interface, the sealing ring is fixedly connected to the left and right sides of the inner wall of the water sampling device body, one end of the main shaft is fixedly connected to the bottom of the inner wall of the water sampling device body, and the other end of the main shaft penetrates to the top of the surface of the water sampling sample body. This device solves the problem that most existing environmental testing water sampling devices need to be powered on before they can be used, and users usually take water samples outdoors where it is inconvenient to get electricity, which brings inconvenience to the user's work. However, it has the disadvantages of being large in size, not easy to carry, and high in preparation cost. Utility Model Content

[0004] In order to overcome the deficiencies in the prior art, the utility model provides a field portable integrated water sampling device, which has a simple structure, is easy to carry, has a low preparation cost, and has no secondary pollution.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present utility model are as follows:

[0006] A portable field water sampling device comprises a control rod, a pressure storage chamber, a main rod, a sample bottle ejector pin, a connecting bracket, a device inner cylinder, a device outer cylinder and a sampling bottle;

[0007] The bottom of the control rod is slidably connected in the pressure storage chamber to form a piston structure. When the control rod is pulled upward, the bottom of the control rod moves upward relative to the pressure storage chamber, but will not leave the pressure storage chamber. For details, please refer to the existing piston or syringe structure.

[0008] The main rod and the sample bottle ejector are both tubular structures, and the pressure storage chamber, the main rod and the sample bottle ejector are sequentially connected from top to bottom and interpenetrate each other;

[0009] One end of the connecting bracket is connected to the bottom of the main rod, and the other end is connected to the top of the inner tube of the device;

[0010] The inner cylinder of the device is a cylindrical structure with a top but no bottom, and the outer cylinder of the device is a cylindrical structure without a top and a bottom; the inner cylinder of the device is slidably connected to the inner side of the outer cylinder of the device;

[0011] A first one-way water inlet grid is arranged on the side wall of the inner cylinder of the device, and a first fixture is arranged at the center of the top of the inner cylinder of the device; a second one-way water inlet grid is arranged on the side wall of the sampling bottle, and a second fixture is arranged at the center of the top of the sampling bottle; the sampling bottle is located inside the inner cylinder of the device, the first one-way water inlet grid is opposite to the second one-way water inlet grid, the first fixture is movably connected with the second fixture, and when the first fixture is separated from the second fixture, the sampling bottle can be removed from the inner cylinder of the device, that is, the sampling bottle is movably connected to the inner cylinder of the device through the second fixture; the ejector pin of the sampling bottle passes through the first fixture and the second fixture and extends into the sampling bottle;

[0012] The inner cylinder of the device can slide upward relative to the outer cylinder of the device to expose the first one-way water inlet grille. When the first one-way water inlet grille is completely exposed, the inner cylinder of the device cannot continue to slide upward relative to the outer cylinder of the device, that is, the inner cylinder of the device will not separate from the outer cylinder of the device. Please refer to the existing syringe structure for details.

[0013] The lowest position of the inner tube of the above-mentioned device relative to the outer tube of the device is that the side wall of the outer tube of the device completely wraps the side wall of the inner tube of the device, and at this time the inner tube of the device cannot continue to move downward relative to the outer tube of the device; the highest position of the inner tube of the device relative to the outer tube of the device is that the first one-way water inlet grille is completely exposed, and at this time the inner tube of the device cannot continue to move upward relative to the outer tube of the device.

[0014] Before sampling, push the bottom of the control rod to the bottom of the pressure storage chamber, flexibly connect the second fixture of the sampling bottle with the first fixture, and align the first one-way water inlet grille with the second one-way water inlet grille; when sampling, grasp the main rod, and push the inner tube, outer tube and sampling bottle of the device into the water area to be sampled. When the inner tube, outer tube and sampling bottle of the device are pushed into the water area to be sampled, the inner tube of the device is located inside the outer tube of the device under the combined effect of the downward thrust of the main rod on the inner tube of the device and the upward buoyancy of the water area on the outer tube of the device, reaching When planning the water depth (such as extracting water samples 5 to 8 cm underwater), pull the main rod upward within the height range of the inner cylinder of the device, and the inner cylinder of the device slides upward relative to the outer cylinder of the device, and the first one-way water inlet grille and the second one-way water inlet grille are exposed to the water. At this time, stop pulling the main rod upward; pull the control rod upward, and the air in the sampling bottle flows into the pressure storage chamber along the sample bottle ejector and the main rod. According to the principle of pressure difference, the water sample in the water area is "pressed" into the sampling bottle through the first and second one-way water inlet grilles in turn, so as to achieve the purpose of collecting water samples. After sampling is completed, the second fixture is detached from the first fixture, the sampling bottle is separated from the inner cylinder of the device, and the sampling bottle falls off, and the water sampling work is completed.

[0015] The water inlet grille is a structure that can only take in water but not discharge water. The existing structure can be used. The present application has no special improvement on this and will not elaborate on it.

[0016] The sample taken from the sampling bottle is used for detection. As common sense, the sampling bottle is provided with a bottle cap, which is arranged on the top of the sampling bottle, and the second fixer is located in the center of the bottle cap.

[0017] In order to facilitate accurate control of the sampling height, a water depth sensor is installed at the bottom of the outer cylinder of the device to sense the sampling depth. When the depth sensed by the water depth sensor corresponds to the planned water depth, sampling can begin.

[0018] In order to facilitate the sampling bottle to fall off, the bottom of the inner tube of the device and the bottom of the sampling bottle are both higher than the bottom of the outer tube of the device. After the sampling is completed, the device is placed on a flat surface, the first and second holders are opened, and the sampling bottle automatically falls off on the flat surface. A layer of elastic material can be laid on the flat surface.

[0019] As one of the specific implementation schemes, the connecting bracket includes more than three connecting rods evenly distributed along the periphery, one end of the connecting rod is connected to the periphery of the bottom of the main rod, and the other end is connected to the periphery of the top of the inner tube of the device, and the sample bottle ejector pin is located at the center position of the inner side of the connecting bracket.

[0020] The first fixture and the second fixture are movably connected together. After sampling is completed, the first fixture and the second fixture are opened and separated so that the sampling bottle can be removed. As one specific implementation scheme, the top of the second fixture is a convex structure with convex ridges along the circumference, and the bottom of the first fixture is a groove structure matching the convex structure. The convex structure at the top of the second fixture is movably engaged in the groove structure at the bottom of the first fixture; the connecting rod is made of elastic plastic or elastic rubber strip, so that when the inner cylinder position of the fixing device pushes the main rod downward, the interval between the main rod and the inner cylinder of the device will be shortened, and the sample bottle ejector between the first fixture and the second fixture is connected with an ejector plate, and the sample bottle ejector is not connected to the first and second fixtures and the sample bottle. In this way, when sampling is completed, the device is placed on a plane, the main rod is pushed downward, and the ejector of the sample bottle drives the ejector plate to push the second fixture downward to separate it from the first fixture, completing the separation of the sampling bottle from the inner cylinder of the device, and the sampling bottle falls on the plane. When performing this step, an elastic layer can be laid on the plane (the ground or the bottom of the sample bottle collection frame).

[0021] As another implementation scheme, the bottom of the first fixture is a groove structure, and the top of the second fixture is a convex structure. The top of the second fixture is provided with two oppositely arranged tentacles. The first fixture is provided with through holes corresponding to the two tentacles. The second fixture is located inside the first fixture. The tentacles are made of iron wire. The two tentacles pass through the corresponding through holes and bend to both sides. In this way, when the sampling is completed, the tentacles are straightened upwards, and the main rod is lifted upwards. The sampling bottle will fall off from the inner cylinder of the device, completing the separation of the sampling bottle from the inner cylinder of the device. The iron wire can be selected from 25# iron wire with a diameter of 0.50mm, 24# iron wire with a diameter of 0.55mm, 23# iron wire with a diameter of 0.60mm, and 22# iron wire with a diameter of 0.70mm to meet the use requirements. It is convenient for bending and straightening operations, and can meet the requirements of the sampling bottle after load-bearing sampling.

[0022] The first fixture and the second fixture may also be other existing matching structures that are convenient for connection and disassembly.

[0023] In order to better ensure the sampling volume and sampling flexibility, the above-mentioned field portable water sampling device also includes a compressible tube and a flexible connecting strip. The pressure storage chamber, compressible tube, main rod and sample bottle ejector are connected in sequence from top to bottom and interpenetrate each other; one end of the flexible strip is connected to the pressure storage chamber and the other end is connected to the main rod. When the compressible tube is in the maximum elongation state, the flexible connecting strip is in a straight state, that is, the flexible connecting strip does not affect the compression and elongation of the compressible tube. Before sampling, push the bottom of the control rod to the bottom of the pressure storage chamber and compress the compressible tube to the shortest state. When sampling, pull the control rod upwards and stretch the compressible tube as needed to increase the sampling negative pressure and better ensure the sampling volume. At the same time, adaptive bending adjustments can be made as needed.

[0024] As one preferred implementation, the flexible connecting strip is made of a stainless steel hose, which can ensure strength and bend at will. Of course, it can also be made of other strong ropes.

[0025] The pressure storage chamber, the main rod, the sample bottle ejector pin, the device inner cylinder, the device outer cylinder and the sampling bottle are all concentrically arranged.

[0026] In order to facilitate assembly and smooth sampling, the first one-way water inlet grille on the inner cylinder of the device is vertically arranged in the height direction, and the number of the first one-way water inlet grilles is more than three distributed in the circumferential direction; on the inner side wall of the inner cylinder of the device, a vertical first slide is provided at a position corresponding to each first one-way water inlet grille, and the second one-way water inlet grille on the sampling bottle is vertically arranged and protrudes from the surface of the sampling bottle. The number of the second one-way water inlet grilles is equal to the number of the first slides and corresponds one to one. The second one-way water inlet grille is located in the corresponding first slide, and the bottom of the first slide is a through structure, which is convenient for the sampling bottle to slide out and detach. This improves the efficiency of the installation of the sampling bottle and can more accurately control the alignment of the first one-way water inlet grille with the second one-way water inlet grille.

[0027] In order to improve the stability of the device during use, the first one-way water inlet grille protrudes from the surface of the inner cylinder of the device, and a second slide groove corresponding to the first one-way water inlet grille is provided on the inner wall of the outer cylinder of the device, and the second slide groove is not through at the bottom but through at the top. A limiting structure is provided at the top of the second slide groove to prevent the inner cylinder of the device from slipping out, so as to prevent the inner cylinder of the device from completely detaching from the outer cylinder of the device when sliding upward. A specific limiting structure, such as side wings are provided on both sides of the bottom of the first one-way water inlet grille, the width of the part below the top of the second slide groove is set to be the same as the width of the first one-way water inlet grille plus the width of the side wings provided on both sides, and the width of the top of the second slide groove is equal to the width of the first one-way water inlet grille, so that when the bottom of the first one-way water inlet grille slides to the top of the second slide groove, the side wings provided on both sides will be blocked, thereby preventing the inner cylinder of the device from slipping out.

[0028] The material used for the above-mentioned main rod is PVC; a bottle cap is provided on the top of the sampling bottle, and a second fixer is provided on the bottle cap. A through hole for the sample bottle ejector to pass through is provided on the second fixer. The material used for the top of the bottle cap is rubber, which makes it easy for the sample bottle ejector to penetrate, and after the sampling is completed and the sample bottle ejector is withdrawn, there will be no leakage.

[0029] The technologies not mentioned in this utility model are all referred to the prior art.

[0030] Compared with the prior art, the utility model has the following beneficial effects:

[0031] 1) The invention has a simple and reasonable structure, a small volume, a low cost, is easy to assemble, easy to carry, and has a wide range of applications.

[0032] 2) It is easy to use and quick to sample, avoiding water pollution caused by the secondary flow of water samples to other containers, and has strong safety.

[0033] 3) It is suitable for various terrains such as lakes, ponds, and canals, and can control the water intake depth more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the external structure of the utility model field portable water sampling device;

[0035] Figure 2 It is a bottom schematic diagram of the inner and outer cylinders of the device of the utility model;

[0036] Figure 3 This is a cross-sectional view of the inner and outer cylinder structures of the device of the utility model;

[0037] Figure 4 It is a schematic diagram of the sampling bottle structure;

[0038] In the figure: 1 is a control rod, 2 is a pressure storage chamber, 3 is a main rod, 4 is a sample bottle ejector, 5 is a connecting bracket, 51 is a connecting rod, 6 is an inner cylinder of the device, 61 is a first one-way water inlet grid, 62 is a first fixer, 7 is an outer cylinder of the device, 71 is a water depth sensor, 8 is a sampling bottle, 81 is a second one-way water inlet grid, 82 is a second fixer, 9 is a compressible tube, and 10 is a flexible connecting strip. DETAILED DESCRIPTION

[0039] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with embodiments, but the content of the present invention is not limited to the following embodiments.

[0040] The directional words such as up and down, left and right, horizontal, and vertical in this application are all based on the relative directions or positional relationships shown in the drawings and should not be understood as absolute limitations on this application.

[0041] Example 1

[0042] like Figure 1-4 As shown, a field portable water sampling device comprises a control rod, a pressure storage chamber, a main rod, a sample bottle ejector pin, a connecting bracket, a device inner cylinder, a device outer cylinder and a sampling bottle;

[0043] The bottom of the control rod is slidably connected in the pressure storage chamber to form a piston structure. When the control rod is pulled upward, the bottom of the control rod moves upward relative to the pressure storage chamber, but will not separate from the pressure storage chamber. For details, please refer to the existing piston or syringe structure; the main rod and the sample bottle ejector are both tubular structures, and the pressure storage chamber, the main rod and the sample bottle ejector are connected in sequence from top to bottom and penetrate each other; one end of the connecting bracket is connected to the periphery of the bottom of the main rod, and the other end is connected to the periphery of the top of the inner tube of the device;

[0044] The inner cylinder of the device is a cylindrical structure with a top but no bottom, and the outer cylinder of the device is a cylindrical structure without a top and a bottom; the inner cylinder of the device is slidably connected to the inner side of the outer cylinder of the device; the side wall of the inner cylinder of the device is provided with a first one-way water inlet grille, and the top center of the inner cylinder of the device is provided with a first fixture; the side wall of the sampling bottle is provided with a second one-way water inlet grille, and the top center of the sampling bottle is provided with a second fixture; the sampling bottle is located on the inner side of the inner cylinder of the device, the first one-way water inlet grille is opposite to the second one-way water inlet grille (aligned and overlapped), and the first fixture is movably connected to the second fixture. When the first fixture and the second fixture are separated from each other, the sampling bottle can be removed from the inner cylinder of the device, that is, the sampling bottle is movably connected to the inner cylinder of the device through the second fixture; the sample bottle ejector passes through the first fixture and the second fixture and extends into the sampling bottle; the inner cylinder of the device can slide upward relative to the outer cylinder of the device to expose the first one-way water inlet grille. When the first one-way water inlet grille is completely exposed, the inner cylinder of the device cannot continue to slide upward relative to the outer cylinder of the device, that is, the inner cylinder of the device will not be separated from the outer cylinder of the device. For details, please refer to the existing syringe structure. The above-mentioned pressure storage chamber, main rod, sample bottle ejector, inner cylinder of the device, outer cylinder of the device and sampling bottle are all concentrically arranged.

[0045] The lowest position of the inner tube of the above-mentioned device relative to the outer tube of the device is that the side wall of the outer tube of the device completely wraps the side wall of the inner tube of the device, and at this time the inner tube of the device cannot continue to move downward relative to the outer tube of the device; the highest position of the inner tube of the device relative to the outer tube of the device is that the first one-way water inlet grille is completely exposed, and at this time the inner tube of the device cannot continue to move upward relative to the outer tube of the device.

[0046] Before sampling, push the bottom of the control rod to the bottom of the pressure storage chamber, the sampling bottle is at normal pressure, the second fixture of the sampling bottle is movably connected to the first fixture, and the first one-way water inlet grille is aligned with the second one-way water inlet grille; when sampling, grab the main rod, and push the inner tube of the device, the outer tube of the device and the sampling bottle into the water area to be sampled. When the inner tube of the device, the outer tube of the device and the sampling bottle are pushed into the water area to be sampled, the inner tube of the device is located in the outer tube of the device under the combined action of the downward thrust of the main rod on the inner tube of the device and the upward buoyancy of the water area on the outer tube of the device. When the planned water depth is reached (such as extracting water samples 5 to 8 cm underwater), pull the main rod upward within the height range of the inner cylinder of the device, and the inner cylinder of the device slides upward relative to the outer cylinder of the device, and the first one-way water inlet grille and the second one-way water inlet grille are exposed to the water. At this time, stop pulling the main rod upward; pull the control rod upward, and the air in the sampling bottle flows into the pressure storage chamber along the sample bottle ejector and the main rod. According to the principle of pressure difference, the water sample in the water area is "pressed" into the sampling bottle through the first and second one-way water inlet grilles in turn, so as to achieve the purpose of collecting water samples. After sampling is completed, the second fixture is detached from the first fixture, the sampling bottle is separated from the inner cylinder of the device, and the sampling bottle falls off, and the water sampling work is completed.

[0047] Example 2

[0048] On the basis of Example 1, the following improvements were made: Figure 2 As shown, in order to facilitate accurate control of the sampling height, a water depth sensor is provided at the bottom of the outer cylinder of the device to sense the sampling depth. When the depth sensed by the water depth sensor corresponds to the planned water depth, sampling can begin. In order to facilitate the falling of the sampling bottle, the bottom of the inner cylinder of the device and the bottom of the sampling bottle are both higher than the bottom of the outer cylinder of the device. After the sampling is completed, the device is placed on a plane, the first fixture and the second fixture are opened, and the sampling bottle automatically falls off on the plane. A layer of elastic material can be laid on the plane.

[0049] Example 3

[0050] On the basis of Example 2, the following improvements were made: Figure 1 As shown, the connecting bracket includes four connecting rods evenly distributed along the periphery, one end of the connecting rod is connected to the periphery of the bottom of the main rod, and the other end is connected to the periphery of the top of the inner cylinder of the device, and the sample bottle ejector is located at the center position of the inner side of the connecting bracket. The top of the second fixture is a convex structure with convex ridges along the circumference, the bottom of the first fixture is a groove structure matching the convex structure, and the convex structure at the top of the second fixture is movably engaged in the groove structure at the bottom of the first fixture; the connecting rod is made of elastic plastic or elastic rubber strip, so that when the inner cylinder position of the fixing device pushes the main rod downward, the interval between the main rod and the inner cylinder of the device will be shortened, and the sample bottle ejector between the first fixture and the second fixture is connected to an ejector plate, and the sample bottle ejector is not connected to the first and second fixtures and the sample bottle. In this way, when the sampling is completed, the device is placed on a plane, the main rod is pushed downward, and the sample bottle ejector drives the ejector plate to push the second fixture downward to separate it from the first fixture, completing the separation of the sampling bottle and the inner cylinder of the device, and the sampling bottle falls on the plane. To do this, lay down an elastic layer on a flat surface (the floor or the bottom of a vial collection frame).

[0051] Example 4

[0052] On the basis of Example 2, the following improvements are further made: the bottom of the first fixture is a groove structure, the top of the second fixture is a convex structure, the top of the second fixture is provided with two oppositely arranged tentacles, the first fixture is provided with through holes corresponding to the two tentacles, the second fixture is located inside the first fixture, the tentacles are made of iron wire, the two tentacles pass through the corresponding through holes respectively and bend to both sides. In this way, when the sampling is completed, the tentacles are straightened upwards, the main rod is lifted upwards, and the sampling bottle falls off from the inner cylinder of the device, completing the separation of the sampling bottle from the inner cylinder of the device. The iron wire can be selected from 25# iron wire with a diameter of 0.50mm, 24# iron wire with a diameter of 0.55mm, 23# iron wire with a diameter of 0.60mm, and 22# iron wire with a diameter of 0.70mm to meet the use requirements, which is convenient for bending and straightening operations, and can meet the requirements of the sampling bottle after load-bearing sampling.

[0053] Example 5

[0054] On the basis of embodiment 3 or 4, the following improvements are further made: in order to better ensure the sampling volume and sampling flexibility, the above-mentioned field portable water sampling device also includes a compressible tube and a flexible connecting strip, the pressure storage chamber, the compressible tube, the main rod and the sample bottle ejector are connected in sequence from top to bottom and interpenetrate each other; one end of the flexible connection is connected to the pressure storage chamber and the other end is connected to the main rod. When the compressible tube is in the maximum elongation state, the flexible connecting strip is in a straight state, that is, the flexible connecting strip does not affect the compression and elongation of the compressible tube. Before sampling, push the bottom of the control rod to the bottom of the pressure storage chamber, and compress the compressible tube to the shortest state. When sampling, after pulling the control rod upward, the compressible tube can be stretched as needed to increase the sampling negative pressure and better ensure the sampling volume. At the same time, adaptive bending adjustment can be made as needed. The material used for the flexible connecting strip is a stainless steel hose. This can ensure strength and can be bent arbitrarily. Of course, it can also be other strong ropes.

[0055] Example 6

[0056] On the basis of Example 5, the following improvements are further made: In order to facilitate assembly and smooth sampling, the first one-way water inlet grille on the inner cylinder of the device is vertically arranged in the height direction, and the number of the first one-way water inlet grilles is more than three distributed in the circumferential direction; on the inner side wall of the inner cylinder of the device, a vertical first slide is provided at a position corresponding to each first one-way water inlet grille, the second one-way water inlet grille on the sampling bottle is vertically arranged and protrudes from the surface of the sampling bottle, the number of the second one-way water inlet grilles is equal to the number of the first slides, and one-to-one corresponds, the second one-way water inlet grille is located in the corresponding first slide, and the bottom of the first slide is a through structure, which is convenient for the sampling bottle to slide out and detach. This improves the efficiency of the installation of the sampling bottle, and can more accurately control the alignment of the first one-way water inlet grille and the second one-way water inlet grille. In order to improve the stability of the device in use, the first one-way water inlet grille protrudes from the surface of the inner cylinder of the device, and the inner side wall of the outer cylinder of the device is provided with a second slide corresponding to the first one-way water inlet grille, and the bottom of the second slide is not through, but the top is through. A limiting structure is provided at the top of the second chute to prevent the inner cylinder of the device from completely detaching from the outer cylinder of the device when it slides upward. The specific limiting structure is, for example, side wings are provided on both sides of the bottom of the first one-way water inlet grille, the width of the portion below the top of the second chute is set to be the same as the width of the first one-way water inlet grille plus the width of the side wings provided on both sides, and the width of the top of the second chute is equal to the width of the first one-way water inlet grille, so that when the bottom of the first one-way water inlet grille slides to the top of the second chute, the side wings provided on both sides will be blocked, thereby preventing the inner cylinder of the device from sliding out. The material used for the main rod is PVC; a bottle cap is provided on the top of the sampling bottle, and the second fixture is provided with a through hole for the sample bottle ejector to pass through. The material used for the top of the bottle cap is rubber, which is convenient for the sample bottle ejector to penetrate, and after the sampling is completed and the sample bottle ejector is withdrawn, there will be no leakage.

[0057] The new portable field water sampling devices in the above-mentioned examples have a simple and reasonable structure, a small size, a low cost, are easy to assemble, easy to carry, and have a wide range of applications; they are easy to use and quick to sample, avoiding water pollution problems caused by the secondary flow of water samples to other containers, and are highly safe; they are suitable for various terrains such as lakes, ponds, and canals, and can more accurately control the water sampling depth.

Claims

1. A portable field water sampling device, characterized in that: It comprises a control rod (1), a pressure storage chamber (2), a main rod (3), a sample bottle ejector pin (4), a connecting bracket (5), a device inner cylinder (6), a device outer cylinder (7) and a sampling bottle (8); The bottom of the control rod (1) is slidably connected in the pressure storage chamber (2) to form a piston structure; the main rod (3) and the sample bottle ejector (4) are both tubular structures, and the pressure storage chamber (2), the main rod (3) and the sample bottle ejector (4) are sequentially connected from top to bottom and interpenetrate each other; one end of the connecting bracket (5) is connected to the bottom of the main rod (3), and the other end is connected to the top of the device inner tube (6); The inner cylinder (6) of the device is a cylindrical structure with a top but no bottom, and the outer cylinder (7) of the device is a cylindrical structure without a top and no bottom; the inner cylinder (6) of the device is slidably connected to the inner side of the outer cylinder (7); a first one-way water inlet grille (61) is provided on the side wall of the inner cylinder (6), and a first fixer (62) is provided at the center of the top of the inner cylinder (6); a second one-way water inlet grille (81) is provided on the side wall of the sampling bottle (8), and a second fixer (82) is provided at the center of the top of the sampling bottle (8); The sampling bottle (8) is located inside the inner cylinder (6) of the device, the first one-way water inlet grille (61) and the second one-way water inlet grille (81) are aligned and overlapped, and the first fixer (62) and the second fixer (82) are movably connected together; the sample bottle ejector pin (4) passes through the first fixer (62) and the second fixer (82) and extends into the sampling bottle (8); the inner cylinder (6) of the device can slide upward relative to the outer cylinder (7) of the device to expose the first one-way water inlet grille (61).

2. The field portable water sampling device according to claim 1, characterized in that: A water depth sensor (71) is provided at the bottom of the outer cylinder (7) of the device; the bottom of the inner cylinder (6) of the device and the bottom of the sampling bottle (8) are both higher than the bottom of the outer cylinder (7) of the device.

3. The field portable water sampling device according to claim 1 or 2, characterized in that: The connecting bracket (5) comprises more than three connecting rods (51) evenly distributed along the periphery, one end of the connecting rod (51) is connected to the periphery of the bottom of the main rod (3), and the other end is connected to the periphery of the top of the inner tube (6) of the device, and the sample bottle ejector pin (4) is located at the center position of the inner side of the connecting bracket (5).

4. The field portable water sampling device according to claim 3, characterized in that: The top of the second fixture (82) is a raised structure with ridges along the circumferential direction, and the bottom of the first fixture (62) is a groove structure matching the raised structure. The raised structure at the top of the second fixture (82) is movably engaged in the groove structure at the bottom of the first fixture (62); the connecting rod (51) is made of elastic plastic or elastic rubber strip, and a top plate is connected to the sample bottle ejector pin (4) between the first fixture (62) and the second fixture (82).

5. The field portable water sampling device according to claim 1 or 2, characterized in that: The bottom of the first fixer (62) is a groove structure, and the top of the second fixer (82) is a convex structure. The top of the second fixer (82) is provided with two oppositely arranged tentacles. The first fixer (62) is provided with through holes corresponding to the two tentacles. The second fixer (82) is located in the first fixer (62). The material used for the tentacles is iron wire. The two tentacles pass through the corresponding through holes on the first fixer (62) and are bent to both sides.

6. The field portable water sampling device according to claim 1 or 2, characterized in that: It also includes a compressible tube (9) and a flexible connecting strip (10); the pressure storage chamber (2), the compressible tube (9), the main rod (3) and the sample bottle ejector pin (4) are connected in sequence from top to bottom and are interconnected; one end of the flexible strip is connected to the pressure storage chamber (2) and the other end is connected to the main rod (3); when the compressible tube (9) is in a maximum elongated state, the flexible connecting strip (10) is in a stretched state.

7. The field portable water sampling device according to claim 6, characterized in that: The material used for the flexible connecting strip (10) is a stainless steel hose.

8. The field portable water sampling device according to claim 1 or 2, characterized in that: The first one-way water inlet grilles (61) on the inner cylinder (6) of the device are vertically arranged in the height direction, and the number of the first one-way water inlet grilles (61) is more than three and distributed in the circumferential direction; a vertical first slide groove is provided on the inner side wall of the inner cylinder (6) of the device at a position corresponding to each first one-way water inlet grille (61); the second one-way water inlet grilles (81) on the sampling bottle (8) are vertically arranged and protrude from the surface of the sampling bottle (8); the number of the second one-way water inlet grilles (81) is equal to the number of the first slide grooves and corresponds one to one; the second one-way water inlet grilles (81) are located in the corresponding first slide grooves, and the bottom of the first slide groove is a through structure.

9. The field portable water sampling device according to claim 8, characterized in that: The first one-way water inlet grille (61) protrudes from the surface of the device inner cylinder (6), and a second slide groove corresponding to the first one-way water inlet grille (61) is provided on the inner side wall of the device outer cylinder (7), the second slide groove is not through at the bottom but through at the top, and a limiting device is provided at the top of the second slide groove to prevent the device inner cylinder (6) from falling out.

10. The field portable water sampling device according to claim 1 or 2, characterized in that: The pressure storage chamber (2), the main rod (3), the sample bottle ejector (4), the device inner tube (6), the device outer tube (7) and the sampling bottle (8) are all arranged concentrically; the material used for the main rod (3) is PVC; a bottle cap is provided on the top of the sampling bottle (8), and a second fixture (82) is provided on the bottle cap. A through hole for the sample bottle ejector (4) to pass through is provided on the second fixture (82), and the material used for the top of the bottle cap is rubber.

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