Sampling equipment for surface water monitoring

Abstract

The invention relates to the technical field of sampling equipment, and discloses sampling equipment for surface water monitoring, the sampling equipment comprises a sampling barrel, a pipe fitting, two piston plates, a plurality of barrier plates and a plurality of plugging assemblies, the pipe fitting is fixedly connected to the middle part in the sampling barrel along the vertical direction, the two piston plates are movably connected in the pipe fitting, the upper surface of the higher piston plate is connected with a rod body, and the upper surface of the lower piston plate is connected with a plurality of baffle plates; the rod body slides on the inner wall of the pipe fitting, the upper end of the rod body is connected with a driving piece used for driving the piston plate to vertically move, the multiple blocking plates block the cavity into multiple water storage cavities used for storing water, and water inlet holes are formed in the positions, corresponding to the water storage cavities, of the pipe fitting and located below the corresponding adjacent blocking plates. A water inlet pipe communicated with the outside of the sampling barrel is transversely connected to the side, located at the water inlet hole, of the pipe fitting, the multiple plugging assemblies are arranged in the water storage cavities respectively, and each plugging assembly comprises an annular floating plate and a plugging piece connected to the floating plate. The device can realize underwater multi-position classified sampling, and the whole sampling process is high in efficiency and high in speed.

Description

Technical Field

[0001] The invention relates to the technical field of sampling equipment, and in particular to a sampling equipment for surface water monitoring. Background Art

[0002] Water resources are the basic elements of human existence. Water environment monitoring provides basic technical support for the rational use of water resources, prevention of environmental risks, safe handling of sudden water pollution incidents, and improvement of law enforcement management. Sampling surface water is the starting point of water environment monitoring. Surface water is accumulated by natural precipitation over the years and naturally flows into the ocean or disappears through evaporation and seeps into the ground. Although the natural water source of any surface water system only comes from precipitation in the catchment area, there are still many other factors that affect the total amount of water in this system.

[0003] At present, surface water samples are usually collected using a collection device, which is divided into fixed and movable types. The fixed type mainly extends into the water surface through pipes and pumps all year round, and can continuously extract water samples. However, when collecting and investigating water samples for fishery ecological data, it is necessary to collect water samples from a larger area and at different depths. Therefore, a movable collection device is more suitable for surface water sample collection. The existing sampling equipment usually includes a floating body that can float on the water surface and has a power source, a traction rope, a winding facility for winding the traction rope, a sampling tube, and a counterweight connected to the bottom of the sampling tube. When sampling, the sampling personnel only need to control the floating body to float to a predetermined position through an electrical signal, and then control the motor of the winding facility to continuously lower the traction rope and the sampling tube into the water sample until the sampling tube reaches the corresponding sampling depth, so that the water sample of the predetermined area and depth is gradually poured into the sampling tube, and the traction rope is remotely controlled to pull the sampling tube to achieve sampling of water samples in different areas and depths.

[0004] However, the current sampling equipment has a relatively simple way of collecting water samples, and it is difficult to achieve continuous and efficient classified sampling in water sources at different locations and depths. When sampling water sources at multiple different locations, it frequently performs pulling and lowering operations. The overall sampling process is not only troublesome but also has low sampling efficiency, which undoubtedly delays the detection time of the sampled water samples. Since the detection of fishery water samples is time-sensitive, when the water samples are too long after sampling, the microorganisms therein will also undergo corresponding changes, thereby affecting the accuracy of the test results and the reliability of the data. Summary of the invention

[0005] The present invention provides a sampling device for surface water monitoring, which can realize underwater multi-position classified sampling, and the whole sampling process is efficient and fast.

[0006] The present invention provides a sampling device for surface water monitoring, comprising: a sampling tube, a pipe fitting, two piston plates, a plurality of baffle plates, and a plurality of plugging components. The pipe fitting is vertically fixedly connected to the middle part of the sampling tube, the two piston plates are movably connected to the pipe fitting, a spacing is left between the two piston plates and the two are fixedly connected, a rod body is connected to the upper surface of the higher piston plate, the rod body slides with the inner wall of the pipe fitting, the upper end of the rod body is connected to a driving member for driving the piston plate to move vertically, and the plurality of baffle plates are annular and evenly distributed. It is arranged in the cavity between the sampling tube and the pipe fitting to block the cavity into multiple water storage chambers for storing water. The pipe fitting corresponds to the position of each water storage chamber and is provided with a water inlet hole below the corresponding adjacent baffle plate. The pipe fitting is located on one side of the water inlet hole and is laterally connected to a water inlet pipe connected to the outside of the sampling tube. Multiple sealing components are respectively placed in each water storage chamber, and the sealing components include an annular floating plate and a sealing part connected to the floating plate. As the water sample in the water storage chamber increases, the floating plate drives the sealing part to rise in height to seal the water inlet hole.

[0007] Preferably, the two piston plates are sealingly and slidably connected to the pipe fitting, and the two are fixedly connected by a plurality of vertical connecting rods.

[0008] Preferably, a cylinder extending into the water storage chamber is horizontally inserted in the water inlet hole, the inner ring of the float plate is gap-matched with the outer wall of the pipe, and a groove is provided on the upper part of the inner ring corresponding to the extended part of the cylinder, and the sealing part includes a sealing block, and after the float plate floats to the top, the sealing block is used to seal the opening of the cylinder placed in the water storage chamber.

[0009] Preferably, a sliding cavity is opened downward at the upper end of the floating plate, a magnet is slidably connected in the sliding cavity, the lower part of the magnet is connected to a first spring for resetting, and a metal block for adsorbing the magnet is connected to the lower surface of the corresponding adjacent blocking plate, and the floating plate is located at the upper part of the sliding cavity and is provided with a sealing isolation layer to prevent water samples from entering.

[0010] Preferably, a guide rod is fixedly connected to the lower end of the magnet, and a floating plate is provided with a recessed hole at the position of the guide rod to enable the guide rod to move vertically. A sliding groove extending through the groove is provided on one side of the floating plate located at the side of the recessed hole, and a sliding rod is slidably connected in the groove. The end of the sliding rod extending to the groove is fixedly connected to the blocking block. The floating plate is provided with an annular inner cavity near the middle of the sliding rod, and a return spring is fixedly sleeved at the corresponding inner cavity of the sliding rod. The end of the sliding rod away from the blocking block is wedge-shaped, and a wedge-shaped groove is correspondingly provided on the guide rod. As the sliding rod moves upward, the wedge surface of the sliding rod fits with the inner surface of the wedge groove so that the sliding rod drives the blocking block to extend into the cylinder for blocking.

[0011] Preferably, an inner wall of one end of the cylinder extending into the water storage chamber is provided with an inner chamfer, and an end of the blocking block close to the cylinder is in a conical shape with the same inclination angle as the inner chamfer of the cylinder.

[0012] Preferably, at least one drainage hole is provided on the outer wall of the sampling tube corresponding to each water storage cavity, and a plug is provided at the drainage hole.

[0013] Preferably, a plurality of hollow buoyancy balls are fixedly connected to the lower part of the floating plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: a plurality of baffle plates are provided to seal and isolate a plurality of water storage chambers for storing sample water in layers, so that frequent pulling and sampling are not required, and classified storage of sample water underwater can be directly realized. Specifically, the two piston plates can be moved along the vertical seal in the pipe fitting, wherein the driving member is used to drive the rod body to drive the two piston plates to move vertically in the pipe fitting. When the sampling tube reaches the predetermined sampling area, the rod body is moved upward so that the gap between the two piston plates is located at the water inlet hole and the outlet end of the water inlet pipe. At this time, the sample water will be poured into the space between the two piston plates in the pipe fitting from the outlet end of the water inlet pipe by water pressure, and poured into the corresponding water storage chamber from the water inlet hole. The plugging component provided is used to realize the sampling of sample water. The water storage chamber behind it has a blocking effect to prevent it from mixing with other water samples. The floating plate arranged therein can drive the sealing member to rise in height as the liquid level rises, so as to have the effect of sealing the water inlet. After the water inlet is blocked, the sampling cylinder can be moved to the next sampling area point. In the same way, the driving member is controlled to drive the gap between the two piston plates to be located at the adjacent upper water inlet, thereby realizing the underwater sampling effect of multiple areas in turn. In summary, compared with the sampling method of the prior art, the device does not require the cumbersome process of frequent sampling, first sampling and then sampling, and also reduces the labor intensity of the sampling personnel, so that the entire sampling process is efficient and fast, ensuring the subsequent detection time and progress of the sample water, avoiding affecting the accuracy of the detection results, and improving the reliability of the water sample data analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the internal structure of a sampling device for surface water monitoring provided by an embodiment of the present invention in a state after sampling of the bottommost water storage chamber;

[0016] Figure 2 for Figure 1 A partial enlarged view of part A;

[0017] Figure 3 for Figure 2 A partial enlarged view of part B;

[0018] Figure 4 A schematic diagram of the internal structure of a sampling device for surface water monitoring provided by an embodiment of the present invention;

[0019] Figure 5 A schematic diagram of the structure of a sampling device for surface water monitoring provided by an embodiment of the present invention;

[0020] Figure 6 A schematic structural diagram of a water inlet pipe of a sampling device for surface water monitoring provided in an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1. Sampling tube; 1001. Drain hole; 1002. Plug body; 2. Pipe fitting; 21. Water inlet hole; 22. Water inlet pipe; 3. Piston plate; 4. Rod body; 5. Driving member; 6. Blocking plate; 61. Water storage chamber; 7. Sealing assembly; 71. Floating plate; 711. Sliding chamber; 712. Magnet; 713. First spring; 714. Metal block; 715. Sealing isolation layer; 716. Concave hole; 717. Slide groove; 718. Inner cavity; 719. Buoyancy ball; 72. Sealing member; 721. Sealing block; 8. Connecting rod; 9. Cylinder member; 91. Inner chamfer; 10. Guide rod; 101. Wedge groove; 11. Sliding rod; 12. Reset spring. DETAILED DESCRIPTION

[0023] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0024] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] refer to Figure 1 , Figure 2 and Figure 4 The present invention provides a sampling device for surface water monitoring, comprising: a sampling tube 1, a pipe fitting 2, two piston plates 3, a plurality of baffle plates 6, and a plurality of plugging components 7. The pipe fitting 2 is vertically fixedly connected to the middle part of the sampling tube 1. The two piston plates 3 are movably connected to the pipe fitting 2. A spacing is left between the two piston plates 3 and the two are fixedly connected. A rod body 4 is connected to the upper surface of the higher piston plate 3. The rod body 4 slides with the inner wall of the pipe fitting 2. The upper end of the rod body 4 is connected to a driving member 5 for driving the piston plate 3 to move vertically. The plurality of baffle plates 6 are all annular and evenly distributed in the cavity between the sampling tube 1 and the pipe fitting 2 to block the cavity into a plurality of water storage chambers 61 for storing water, such as Figure 5 and Figure 6As shown, the pipe fitting 2 corresponds to the position of each water storage chamber 61 and is provided with a water inlet hole 21 below the corresponding adjacent baffle plate 6. The pipe fitting 2 is located on one side of the water inlet hole 21 and is laterally connected to a water inlet pipe 22 connected to the outside of the sampling tube 1. A plurality of sealing components 7 are respectively placed in each water storage chamber 61. The sealing components 7 include an annular floating plate 71 and a sealing member 72 connected to the floating plate 71. As the amount of water sample in the water storage chamber 61 increases, the floating plate 71 drives the sealing member 72 to rise in height to seal the water inlet hole 21.

[0026] In the above embodiments, a plurality of baffle plates 6 are provided to seal and isolate a plurality of water storage chambers 61 for storing sample water in layers, so that the sample water can be directly stored in a classified manner underwater without frequent pulling and sampling. Specifically, the two piston plates 3 can be moved vertically and sealed along the pipe 2, wherein the driving member 5 is provided to drive the rod body 4 to drive the two piston plates 3 to move vertically in the pipe 2. When the sampling tube 1 reaches the predetermined sampling area, the rod body 4 is moved upward so that the gap between the two piston plates 3 is located at the outlet end of the water inlet hole 21 and the water inlet pipe 22. At this time, the sample water will be poured into the space between the two piston plates 3 in the pipe 2 from the outlet end of the water inlet pipe 22 by water pressure, and poured into the corresponding water storage chamber 61 from the water inlet hole 21. The plugging component 7 provided is used to realize the sampling of the sample water after sampling. The water storage chamber 61 is blocked to prevent it from mixing with other water samples. The floating plate 71 arranged therein can drive the sealing member 72 to rise in height as the liquid level rises, so as to have the effect of blocking the water inlet 21. After the water inlet 21 is blocked, the sampling tube 1 can be moved to the next sampling area point. In the same manner, the driving member 5 is controlled to drive the gap between the two piston plates 3 to be located at the adjacent upper water inlet 21, thereby realizing the underwater sampling effect of multiple areas in turn. In summary, compared with the sampling method of the prior art, the device does not require the cumbersome process of frequent sampling and then sampling, and also reduces the labor intensity of the sampling personnel, so that the entire sampling process is efficient and fast, ensuring the subsequent detection time and progress of the sample water, avoiding affecting the accuracy of the detection results, and improving the reliability of the water sample data analysis.

[0027] Further, refer to Figure 2 The two piston plates 3 are sealed and slidably connected to the pipe fitting 2, and the two are fixedly connected by a plurality of vertical connecting rods 8.

[0028] In the above embodiments, the connecting rod 8 is made of metal and is evenly distributed on the surface of the piston in the circumferential direction.

[0029] Further, refer to Figure 2 and Figure 3A cylinder 9 extending into the water storage chamber 61 is horizontally inserted into the water inlet hole 21, the inner ring of the floating plate 71 is gap-matched with the outer wall of the pipe 2, and a groove is provided on the upper part of the inner ring corresponding to the extended part of the cylinder 9, and the blocking member 72 includes a blocking block 721. After the floating plate 71 floats to the top, the blocking block 721 is used to block the opening of the cylinder 9 placed in the water storage chamber 61.

[0030] In the above embodiments, in order to enable the floating plate 71 to move up to the height of the water inlet hole 21 and to achieve a tight fit with the water inlet hole 21, the cylinder 9 and the groove provided for the floating plate 71 can achieve a fitting effect. When the floating plate 71 rises to the maximum height, the blocking block 721 is used to block the water inlet hole 21.

[0031] Further, refer to Figure 2 and Figure 3 A sliding cavity 711 is downwardly opened at the upper end of the floating plate 71, and a magnet 712 is slidably connected in the sliding cavity 711. The lower part of the magnet 712 is connected to a first spring 713 for resetting, and a metal block 714 for adsorbing the magnet 712 is connected to the lower surface of the corresponding adjacent blocking plate 6. The floating plate 71 is located at the upper part of the sliding cavity 711 and is provided with a sealing isolation layer 715 to prevent water samples from being poured in.

[0032] In the above embodiments, in order to ensure that the floating plate 71 does not float after reaching a predetermined height and affect the sealing effect, the magnet 712 is set so that when it is close to the metal block 714 of the blocking plate 6, it will slide toward the side of the metal block 714 and be adsorbed by the metal block 714, thereby achieving the effect of limiting the floating plate 71, wherein the sealing isolation layer 715 set can be a thin plastic material or a plastic film.

[0033] Further, refer to Figure 2 and Figure 3 The lower end of the magnet 712 is fixedly connected to the guide rod 10, and the floating plate 71 is located at the position of the guide rod 10 and is provided with a recessed hole 716 to enable the guide rod 10 to move vertically. The floating plate 71 is located on one side of the recessed hole 716 and is provided with a sliding groove 717 extending through one side of the groove. The sliding rod 11 is slidably connected in the sliding groove 717, and the end of the sliding rod 11 extending to one side of the groove is fixedly connected to the blocking block 721. The floating plate 71 is provided with an annular inner cavity 718 near the middle of the sliding rod 11, and the sliding rod 11 is fixedly sleeved with a return spring 12 at the corresponding inner cavity 718. The end of the sliding rod 11 away from the blocking block 721 is wedge-shaped, and the guide rod 10 is correspondingly provided with a wedge-shaped groove 101. As the sliding rod 11 moves upward, the wedge surface of the sliding rod 11 fits with the inner surface of the wedge groove 101 so that the sliding rod 11 drives the blocking block 721 to extend into the cylinder 9 for blocking.

[0034] In the above embodiments, in order to make the sealing block 721 seal the water inlet 21 more tightly, when the floating plate 71 rises to the extreme position, the magnet 712 will be adsorbed by the metal block 714, and at this time, the guide rod 10 will be driven to slide upward along the recessed hole 716. At this time, the wedge groove 101 of the guide rod 10 will contact the wedge-shaped surface of the sliding rod 11, and drive the sliding rod 11 to slide along the slide groove 717 toward one side of the groove. At this time, the reset spring 12 is compressed, and the sealing block 721 fixed to the sliding rod 11 extends toward the cylinder 9, and the sealing block 721 is further sealed to seal the water inlet 21.

[0035] Further, refer to Figure 2 and Figure 3 The inner wall of one end of the cylinder 9 extending into the water storage chamber 61 is provided with an inner chamfer 91 , and the end of the blocking block 721 close to the cylinder 9 is in a cone shape with the same inclination angle as the inner chamfer 91 of the cylinder 9 .

[0036] In the above embodiment, an inner chamfer 91 is provided on the inner wall of one end of the cylinder 9 extending into the water storage chamber 61, and the end of the sealing block 721 close to the cylinder 9 is in a cone shape with the same inclination angle as the inner chamfer 91 of the cylinder 9, so that after the sealing block 721 extends toward the cylinder 9, the inclined surface of the sealing block 721 fits more closely with the inner chamfer 91 of the cylinder 9.

[0037] Further, refer to Figure 4 and Figure 5 Considering that the sample water in the sampling tube 1 needs to be discharged, an outlet for discharging the sample water needs to be conventionally provided. Therefore, at least one drainage hole 1001 is provided on the outer wall of each water storage cavity 61 of the sampling tube 1, and a plug body 1002 is provided at the drainage hole 1001. Specifically, the outer diameter of the floating plate 71 is smaller than the inner diameter of the sampling tube 1 to avoid blocking the drainage hole 1001.

[0038] Further, refer to Figure 2 A plurality of hollow buoyancy balls 719 are fixedly connected to the lower part of the floating plate 71 .

[0039] In the above embodiments, the buoyancy ball 719 is also hollow to enhance the buoyancy of the floating plate 71 .

[0040] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A sampling device for surface water monitoring, characterized in that: include: Sampling tube (1); A pipe fitting (2) is vertically fixed to the middle portion of the sampling tube (1); Two piston plates (3) are movably connected in the pipe (2), a distance is left between the two piston plates (3) and the two are fixedly connected, the upper surface of the higher piston plate (3) is connected to a rod body (4), the rod body (4) slides with the inner wall of the pipe (2), and the upper end of the rod body (4) is connected to a driving member (5) for driving the piston plate (3) to move vertically; A plurality of baffles (6) are annular and evenly distributed in the cavity between the sampling tube (1) and the pipe (2) so as to divide the cavity into a plurality of water storage chambers (61); the pipe (2) is provided with water inlet holes (21) corresponding to the positions of the water storage chambers (61) and located below the corresponding adjacent baffles (6); the pipe (2) is transversely connected to a water inlet pipe (22) communicating with the outside of the sampling tube (1) at one side of the water inlet hole (21); A plurality of blocking components (7) are respectively disposed in each water storage chamber (61), wherein the blocking components (7) include an annular floating plate (71) and a blocking member (72) connected to the floating plate (71); as the amount of water in the water storage chamber (61) increases, the floating plate (71) drives the blocking member (72) to rise in height to block the water inlet hole (21).

2. A sampling device for surface water monitoring according to claim 1, characterized in that: The two piston plates (3) are sealingly and slidably connected to the pipe (2), and the two are fixedly connected via a plurality of vertical connecting rods (8).

3. A sampling device for surface water monitoring according to claim 1, characterized in that: A cylindrical member (9) extending into the water storage chamber (61) is horizontally inserted into the water inlet hole (21); the inner ring of the floating plate (71) is clearance-matched with the outer wall of the pipe member (2); and a groove is provided at the upper portion of the inner ring corresponding to the portion where the cylindrical member (9) extends; the blocking member (72) comprises a blocking block (721); and after the floating plate (71) floats to the uppermost position, the blocking block (721) is used to block the opening of the cylindrical member (9) placed in the water storage chamber (61).

4. A sampling device for surface water monitoring as claimed in claim 3, characterized in that: A sliding cavity (711) is provided downwardly at the upper end of the floating plate (71), and a magnet (712) is slidably connected in the sliding cavity (711). A first spring (713) for resetting is connected to the lower part of the magnet (712), and a metal block (714) for adsorbing the magnet (712) is connected to the lower surface of the adjacent blocking plate (6). A sealing isolation layer (715) is provided on the upper part of the sliding cavity (711) of the floating plate (71) to prevent water samples from entering.

5. A sampling device for surface water monitoring as claimed in claim 4, characterized in that: The lower end of the magnet (712) is fixedly connected to the guide rod (10); the floating plate (71) is provided with a concave hole (716) at the position of the guide rod (10) to enable the guide rod (10) to move vertically; the floating plate (71) is provided with a sliding groove (717) extending through and extending toward one side of the groove at one side of the concave hole (716); a sliding rod (11) is slidably connected in the sliding groove (717); the end of the sliding rod (11) extending toward one side of the groove is fixedly connected to the blocking block (721); the floating plate (71) is close to the sliding groove (717). An annular inner cavity (718) is provided in the middle of the movable rod (11), and a reset spring (12) is fixedly sleeved at the inner cavity (718) corresponding to the sliding rod (11). The end of the sliding rod (11) away from the blocking block (721) is wedge-shaped, and the guide rod (10) is correspondingly provided with a wedge-shaped groove (101). As the sliding rod (11) moves upward, the wedge surface of the sliding rod (11) fits with the inner surface of the wedge-shaped groove (101), so that the sliding rod (11) drives the blocking block (721) to extend into the cylinder (9) for blocking.

6. A sampling device for surface water monitoring according to claim 4, characterized in that: An inner chamfer (91) is formed on the inner wall of one end of the cylinder (9) extending into the water storage chamber (61), and an end of the blocking block (721) close to the cylinder (9) is in a conical shape with the same inclination angle as the inner chamfer (91) of the cylinder (9).

7. A sampling device for surface water monitoring according to claim 1, characterized in that: The sampling tube (1) is provided with at least one drainage hole (1001) on the outer wall corresponding to each of the water storage chambers (61), and a plug body (1002) is provided at the drainage hole (1001).

8. A sampling device for surface water monitoring according to claim 1, characterized in that: A plurality of hollow buoyancy balls (719) are fixedly connected to the lower part of the floating plate (71).

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