Water sampling device

Abstract

The invention belongs to the technical field of environmental monitoring, and relates to a water sample collection device which comprises a sampling container, a tension spring, a support rod, a rubber ring and a lifting mechanism, a water inlet is formed in the top of the sampling container, and a cover plate is hinged to the outer top surface of the top; one end of the tension spring is connected into the sampling container, the other end of the tension spring penetrates through the water inlet and is connected to the inner surface of the cover plate, the tension spring is in a stretched state in an initial state, the cover plate covers the water inlet, and a sealing gasket is fixedly arranged on the inner surface of the cover plate; the bottom end of the supporting rod is fixed on the sampling container; the rubber ring is elastically clamped on the supporting rod; the lifting mechanism is connected to the cover plate and used for pulling the cover plate open. According to the collecting device, the sampling container can be quickly fed underwater through the supporting rod, the distance from the water inlet to the water surface can be accurately measured by moving the rubber ring, the water depth accuracy is high, the cover plate can be conveniently controlled to turn over by utilizing the lifting mechanism, and the cover plate can be automatically controlled to cover the water inlet through the tension spring; the sealing gasket seals the water inlet, so that the leakproofness of the sampling container can be ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental monitoring and relates to a water sample collection device. Background Art

[0002] According to the "Technical Specifications for Surface Water Environmental Quality Monitoring", when monitoring surface water bodies such as rivers, lakes, reservoirs, and channels, the sampling points on the monitoring vertical line need to be set at specific depths, such as water depth h ≤ 5m, 5m < h ≤ 10m, and h > 10m. The collection of surface water quality requires a high degree of accuracy in sampling depth. The sampling container can be opened and water samples can be taken only when it accurately reaches the required sampling depth, and it should remain sealed during the lifting and lowering process.

[0003] Currently, samplers can be divided into two types: manually controlled and automatically controlled. There are significant differences in their operation methods and structures. Automatically controlled samplers usually have complex structures, large volumes, high prices, and are not easy to carry. Manually controlled samplers are usually vertical or plexiglass samplers, which are widely used because of their simple structures, easy portability, and low cost. During the process of such manually controlled sampling devices sinking in water, water flows through the sampling container. When the sampling container reaches the predetermined depth, the sampling container can be closed to complete the water sample collection. For example, in the "Technical Guidance for Water Sampling (HJ494 - 2009)", the emptied sampler is a manual and simple-to-operate sampler. This sampler is a cylindrical device made of glass or plastic with openings at both ends, scales and a thermometer on the side, a rubber tube connected to the lower side end, and weights at the bottom. There are two semi-circular lids that open upward in the same direction at the top and bottom ends. When the sampler sinks into the water, the two semi-circular lids at each end open upward accordingly, and water does not stay in the sampler. When it is lifted to the predetermined depth, the two semi-circular lids cover it, and thus the sample at the required depth is obtained. The above-mentioned manually controlled sampling devices are insufficient in terms of controlling the water sampling depth and tightness. Summary of the Invention

[0004] The object of the present invention is to provide a water sample collection device that can manually control the water sampling depth and achieve accurate water sample collection, so as to solve the problem that the existing sampling devices are insufficient in terms of controlling the water sampling depth and tightness as mentioned in the above background art.

[0005] The present invention is achieved through the following technical solutions:

[0006] A water sample collection device includes a sampling container. A chamber for containing water samples is formed inside the sampling container. An inlet that communicates inside and outside is opened at the top of the sampling container. A cover plate for opening and closing the inlet is hinged to the outer top surface of the top of the sampling container. When the cover plate is flipped open, the inlet can be opened to allow water samples to flow into the sampling container. When the cover plate is flipped closed, the inlet can be sealed to prevent water from entering the sampling container.

[0007] It includes a tension spring, one end of which is connected to the inside of the sampling container, and the other end of which passes through the water inlet and is connected to the inner surface of the cover plate. In the initial state, the tension spring is in a stretched state and the cover plate covers the water inlet. A sealing gasket is fixedly arranged on the inner surface of the cover plate. When the cover plate is closed on the top outer surface of the sampling container to cover the water inlet, the sealing gasket can form a seal between the cover plate and the top outer surface of the sampling container under the tension of the tension spring, thereby improving the airtightness when the cover plate covers the water inlet, and preventing water in the water body from seeping into the sampling container from the water inlet when the cover plate covers the water inlet during the lifting process of the sampling container;

[0008] It includes a support rod, the bottom end of which is fixed on the sampling container, and the support rod is used to send the sampling container to a specified water depth, and the outer surface of the support rod is provided with a plurality of scale lines distributed at equal intervals along its axial direction;

[0009] It includes a rubber ring with an elastic clamp on the support rod for marking the water depth, and the rubber ring can move along the axial direction of the support rod. Before the sampling container is put into the water, according to the scale line corresponding to the sampling water depth on the support rod, the rubber ring is pushed by hand to move on the support rod to the scale line corresponding to the sampling water depth;

[0010] It also includes a pulling mechanism connected to the cover for pulling open the cover. When the sampling container reaches a specified water depth, the pulling mechanism can be used to pull open the cover, so that the water sample at the specified water depth flows into the sampling container through the water inlet. After a certain period of time, the pulling mechanism is released, and the tension spring can drive the cover to reset to seal the water inlet, thereby completing the water sample collection.

[0011] Furthermore, the sampling container includes a sampling barrel and a barrel cover threadedly connected to the top of the sampling barrel. Removing the barrel cover can facilitate cleaning of the inner surface of the sampling barrel and the inner surface of the barrel cover; the inner bottom surface of the sampling barrel and the inner surface of the cover are welded with hanging rings, and both ends of the tension spring are integrally formed with hooks for hooking with the hanging rings, so that the tension spring can be removed. Before removing the barrel cover, first flip the cover to separate the hook at the top of the tension spring from the hanging ring on the cover, and then the barrel cover can be twisted to remove.

[0012] Furthermore, the cover plate is provided with a plurality of through holes on the outer side of the sealing gasket. When the cover plate is flipped open or flipped closed, the plurality of through holes can reduce the water resistance encountered when the cover plate is flipped in the water body, making it easier and faster to open and close the cover plate.

[0013] Furthermore, a drainage pipe is provided on the bottom side wall of the sampling barrel, and a water stop valve is provided on the drainage pipe. Opening the water stop valve can facilitate the discharge of the water sample in the sampling barrel.

[0014] Furthermore, the bottom end of the support rod is fixed (threaded, screwed or welded) to the center of the outer wall of the sampling barrel or the outer top surface of the barrel cover, and the support rod can be held and manually controlled to lower the sampling container to a specified depth in the water body.

[0015] Furthermore, a counterweight block in the shape of a pointed cone is fixedly arranged (threaded, screwed or welded) on the outer bottom of the sampling container. When the sampling container is sent into the water body by using a support rod, the counterweight block can help reduce buoyancy. The counterweight block in the shape of a pointed cone can help reduce water resistance, and the sampling container can be sent to a specified water depth faster and easier.

[0016] Furthermore, the pulling mechanism includes a pull rope and a buckle welded to the outer wall of the lower part of the support rod. The pull rope is passed through the buckle, and its bottom end is fixed to an end of the cover plate away from the hinge axis. By pulling the pull rope, the cover plate can be flipped to open the cover plate.

[0017] Furthermore, the support rod is a combined structure formed by multiple sections of first rod bodies connected in series, and two adjacent sections of the first rod bodies are threadedly connected to facilitate disassembly and assembly, and can be assembled into a support rod of appropriate length according to the sampling depth.

[0018] Furthermore, the pulling mechanism includes a pull rope and a pull rod; the support rod is a hollow rod-shaped structure, and a rope threading hole communicating with the inside and outside is opened on the bottom side wall; the pull rod is installed in the support rod, one end of the pull rope is inserted into the rope threading hole and fixedly connected to the bottom end of the pull rod, and the other end is fixed to the end of the cover plate away from the hinge axis.

[0019] Furthermore, the support rod is a combined structure formed by multiple hollow rod sections connected in series, and two adjacent hollow rod sections are threadedly connected, which is convenient for disassembly and assembly, and can be assembled into a support rod of appropriate length according to the sampling depth; the pull rod is a combined structure formed by multiple second rod sections connected in series, and two adjacent second rod sections are threadedly connected, which is convenient for disassembly and assembly, and can be assembled into a pull rod of appropriate length according to the sampling depth and the length of the support rod.

[0020] Furthermore, at least one partition is provided inside the sampling barrel to divide the inside of the sampling barrel into a plurality of chambers, a water inlet is provided on the barrel cover at the top of each chamber, the bottom end of the support rod is fixed (threaded, screwed or welded) at the center of the outer top surface of the barrel cover, the plurality of water inlets are evenly distributed in a ring shape with the central axis of the support rod as the center, the outer top surface of the barrel cover is hinged with a plurality of cover plates respectively used for opening and closing the plurality of water inlets, a plurality of buckles are welded to the lower outer side wall of the support rod, a draw rope is passed through each buckle, and the draw ropes are arranged on the outer side wall of the support rod. The bottom ends are respectively fixed to one end of the multiple cover plates away from the hinge axis, and hanging rings are welded on the bottom surface of each chamber and the inner surface of each cover plate. A tension spring is arranged in each chamber, and both ends of the tension spring are integrally formed with a hook portion for connecting with the hanging ring. Multiple rubber rings are arranged on the support rod, and the multiple rubber rings can be moved to the corresponding sampling depths respectively. In the process of lowering the sampling container into the water body, the corresponding pull ropes can be pulled in turn to open the cover plates for water sample collection, and the multiple chambers inside the sampling container can be used to collect water samples at different depths.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The water sample collection device can quickly send the sampling container underwater through the support rod, and accurately measure the distance from the water inlet to the water surface by moving the rubber ring. The water depth accuracy is high and can even reach the millimeter level, ensuring the accuracy of water sampling. The cover is controlled to flip with a lifting mechanism to facilitate opening the water inlet. The cover is controlled to seal the water inlet with a tension spring, and the sealing gasket forms a seal to ensure the airtightness of the sampling container. The water sample collection device overcomes the shortcomings of traditional water sample collectors in terms of sampling depth accuracy, equipment weight and operation complexity, and realizes high-precision manual collection of water samples at a certain depth in the shallow water layer, allowing researchers to sample more conveniently and effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0024] Figure 1 It is a schematic cross-sectional structural diagram of embodiment 1 of the present invention;

[0025] Figure 2 for Figure 1 A schematic diagram of the enlarged local structure at center A;

[0026] Figure 3 It is a schematic cross-sectional structural diagram of embodiment 2 of the present invention;

[0027] Figure 4It is a cross-sectional structural schematic diagram of embodiment 3 of the present invention;

[0028] Figure 5 This is a schematic diagram of the three-dimensional structure of Example 3 of the present invention;

[0029] Figure 6 This is a schematic diagram of the explosion structure of Example 3 of the present invention.

[0030] The names of the components in the figure are: 1. Sampling container; 1.1. Sampling barrel; 1.2. Barrel cover; 1.3. Partition; 2. Support rod; 2.1. Hollow rod body; 3. Rubber ring; 4. Pulling mechanism; 4.1. Pull rope; 4.2. Buckle; 4.3. Pull rod; 4.3.1. Second rod body; 5. Cover plate; 6. Sealing gasket; 7. Water inlet; 8. Tension spring; 9. Water stop valve; 10. Hanging ring; 11. Counterweight; 12. Hook and hanging part; 13. Sealing pad layer; 14. Rope threading hole. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0032] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0033] Example 1

[0034] A water sample collection device, such as Figure 1 and Figure 2 As shown, it is mainly composed of a sampling container 1, a support rod 2, a rubber ring 3, a lifting mechanism 4, a cover plate 5, a tension spring 8 and a counterweight 11.

[0035] like Figure 1 As shown, the sampling container 1 comprises a sampling barrel 1.1 and a barrel cover 1.2 threadedly connected to the top of the sampling barrel 1.1. When the barrel cover 1.2 is installed on the top of the sampling barrel 1.1, a chamber for containing water samples is formed inside the sampling container 1. Removing the barrel cover 1.2 can facilitate cleaning of the inner surface of the sampling barrel 1.1 and the inner surface of the barrel cover 1.2. The barrel cover 1.2 is provided with a water inlet 7;

[0036] The bottom side wall of the sampling barrel 1.1 is provided with a drain pipe, and a water stop valve 9 is provided on the drain pipe. Opening the water stop valve 9 can facilitate the discharge of the water sample in the sampling barrel 1.1. In addition, a rubber hose or a silicone hose can be connected to the drain pipe and a water stop clamp can be provided on the hose to replace the water stop valve 9, so as to realize the rapid discharge of the water sample in the sampling barrel 1.1. Specifically, the water stop valve 9 can be a ball valve or a cover threadedly connected to the end of the drain pipe.

[0037] like Figure 1 As shown, the bottom end of the support rod 2 is welded to the outer wall of the sampling barrel 1.1, and the support rod 2 is used to send the sampling container 1 to a specified water depth. The outer surface of the support rod 2 is provided with a plurality of scale lines (not shown in the figure) distributed at equal intervals along its axial direction. The scale lines on the support rod 2 can be used to conveniently measure the depth of the sampling container 1 entering the water. Specifically, the spacing between two adjacent scale lines is 1mm, and the bottom scale line on the support rod 2 is flush with the top of the water inlet 7, that is, 0mm into the water. A "0" digital mark is provided on one side of this scale line on the support rod 2, and digital marks are provided on the support rod 2 every 10mm, from the "0" mark upwards, there are "1", "2", "3"... natural number marks, and the support rod 2 can be manually controlled by holding the support rod 2 to lower the sampling container 1 to a specified depth in the water body;

[0038] The rubber ring 3 elastic clamp is used to mark the water depth on the support rod 2, and the rubber ring 3 can move along the axial direction of the support rod 2. Before the sampling container 1 enters the water, according to the corresponding scale line on the support rod 2 for the sampling water depth, the rubber ring 3 is pushed by hand to move on the support rod 2, and the rubber ring 3 is moved to the scale line corresponding to the sampling water depth. When the support rod 2 is inserted into the water body and the rubber ring 3 is located on the water surface, the surface sampling container 1 reaches the set sampling water depth. For example, when the sampling water depth is required to be 3m, the rubber ring 3 is moved to the scale line on the support rod 2 representing a depth of 3m, and the rubber ring 3 is lowered until it is flush with the horizontal.

[0039] like Figure 1 and Figure 2 As shown, the cover plate 5 is hinged to the outer top surface of the barrel cover 1.2 for opening and closing the water inlet 7. When the cover plate 5 is flipped open, the water inlet 7 can be opened to allow the water sample to flow into the sampling container 1. When the cover plate 5 is flipped closed, the water inlet 7 can be sealed to prevent water from entering the sampling container 1. Specifically, two hinged seats with holes are welded on the outer top surface of the barrel cover 1.2, one end of the cover plate 5 is located between the two hinged seats, and the cover plate 5 is hinged to the two hinged seats through a hinge shaft;

[0040] The inner bottom surface of the sampling barrel 1.1 and the inner surface of the cover plate 5 are both welded with a hanging ring 10, and the tension spring 8 passes through the water inlet 7. Both ends of the tension spring 8 are integrally formed with a hook portion 12 for hooking and connecting with the hanging ring 10. In the initial state, the tension spring 8 is in a stretched state and the cover plate 5 covers the water inlet 7. Before removing the barrel cover 1.2, first turn over the cover plate 5 to separate the hook portion 12 at the top of the tension spring 8 from the hanging ring 10 on the cover plate 5, and then the barrel cover 1.2 can be twisted to remove;

[0041] A sealing gasket 6 is fixedly provided on the inner surface of the cover plate 5. When the cover plate 5 is closed on the top outer top surface of the sampling container 1 to cover the water inlet 7, under the tension of the tension spring 8, the sealing gasket 6 can form a seal between the cover plate 5 and the top outer top surface of the sampling container 1, thereby improving the airtightness when the cover plate 5 covers the water inlet 7, and preventing water in the water body from seeping into the sampling container 1 from the water inlet when the cover plate 5 covers the water inlet 7 during the lifting and lowering process of the sampling container 1, affecting the sampling results.

[0042] like Figure 1 and Figure 2 As shown, the lifting mechanism 4 is connected to the cover plate 5 and is used to pull open the cover plate 5. When the sampling container 1 reaches a specified water depth, the lifting mechanism 4 can be used to pull open the cover plate 5, so that the water sample at the specified water depth flows into the sampling container 1 through the water inlet 7. After a certain period of time, the lifting mechanism 4 is released, and the tension spring 8 can drive the cover plate 5 to return to its original position to seal the water inlet 7, thereby completing the water sample collection.

[0043] Specifically, the pulling mechanism 4 includes a pull rope 4.1 and a buckle 4.2 welded to the outer side wall of the lower part of the support rod 2. The pull rope 4.1 is inserted into the buckle 4.2, and its bottom end is fixed to the end of the cover plate 5 away from the hinge axis. By pulling the pull rope 4.1, the cover plate 5 can be pulled to flip to open the cover plate 5; specifically, the buckle 4.2 on the support rod 2 can guide the pull rope 4.1, and multiple pull ropes 4.1 can also be arranged on the support rod 2 along its axial direction. The buckle 4.2 can change the direction of the pull rope 4.1 so that the pull rope 4.1 between the cover plate 5 and the support rod 2 is inclined, so that the cover plate 5 can be pulled to flip more easily. The bottom buckle 4.2 on the support rod 2 is at a certain height away from the outer top surface of the sampling container 1, so that the pull rope 4.1 can pull the cover plate 5 to flip, and the height of the buckle 4.2 should not be too high or too low.

[0044] like Figure 1 As shown, the counterweight 11 is in a pointed cone shape, and its top is welded to the outer bottom of the sampling barrel 1.1. When the sampling container 1 is sent into the water body by using the support rod 2, the counterweight 11 can help reduce the buoyancy. The pointed cone-shaped counterweight 11 can help reduce water resistance and can send the sampling container 1 to the specified water depth faster and easier.

[0045] Preferably, in the present embodiment, a plurality of through holes (not shown in the figure) are provided on the cover plate 5 at the outer side of the sealing gasket 6. When the cover plate 5 is flipped open or flipped closed, the plurality of through holes can reduce the water resistance encountered by the cover plate 5 during the flipping process in the water body, making it easier and faster to open and close the cover plate 5.

[0046] Preferably, in this embodiment, the support rod 2 is a combined structure formed by multiple sections of first rod bodies connected in series, and two adjacent sections of the first rod bodies are threadedly connected to facilitate disassembly and assembly, and can be assembled into a support rod 2 of appropriate length according to the sampling depth.

[0047] The working principle of this embodiment is:

[0048] When collecting water samples in a water body, according to the depth of the water sample to be collected, the rubber ring 3 is moved to the corresponding scale line on the support rod 2. The vertical height between the top of the water inlet 7 and the rubber ring 3 is the sampling water depth. The sampling personnel hold the support rod 2 to send the sampling container 1 into the water body. In the process of lowering the sampling container 1, the cover plate 5 is always covered with the water inlet 7 under the action of the tension spring 8 to prevent water from seeping into the sampling container 1 before the sampling container 1 is in place. Until the rubber ring 3 on the support rod 2 is flush with the water surface, that is, the top of the surface water inlet 7 has reached the water depth to be sampled, the sampling personnel pulls the pull rope 4.1, and uses the pull rope 4.1 to pull the cover plate 5 to flip and open The water sample enters the sampling container 1 through the water inlet 7. After a certain period of time, the pull rope 4.1 is released. Under the tension of the tension spring 8, the cover plate 5 flips back to its original position to seal the water inlet 7, thereby completing the water sample collection at a specified water depth. The support rod 2 is lifted to take out the sampling container 1, and the water sample in the sampling container 1 can be taken out by opening the water stop valve 9. The manually controlled collection device can manually control the water sampling depth to achieve accurate water sample collection. In the process of lifting and lowering the sampling container 1, the cover plate 5 seals the water inlet 7, so that the sampling container 1 has better airtightness, which can prevent water from seeping into the sampling container 1 during the lifting and lowering of the sampling container 1 in the water body and affecting the sampling result.

[0049] Example 2

[0050] A water sample collection device, which is different from Example 1 in that: Figure 3As shown, a partition 1.3 is arranged inside the sampling barrel 1.1 to divide the inside of the sampling barrel 1.1 into two chambers, a water inlet 7 is provided on the barrel cover 1.2 at the top of each chamber, the bottom end of the support rod 2 is threadedly connected to the center of the outer top surface of the barrel cover 1.2, the two water inlets 7 are symmetrically distributed around the central axis of the support rod 2, the outer top surface of the barrel cover 1.2 is hinged with two cover plates 5 for opening and closing the two water inlets 7, two buckles 4.2 are welded to the lower outer side wall of the support rod 2, each buckle 4.2 is penetrated with a drawstring 4.1, and the bottom of the two drawstrings 4.1 is The ends are respectively fixed on the two cover plates 5 at one end away from the hinge axis, and a hanging ring 10 is welded on the bottom surface of each chamber and the inner surface of each cover plate 5. A tension spring 8 is arranged in each chamber, and both ends of the tension spring 8 are integrally formed with a hook portion 12 for hooking and connecting with the hanging ring 10. Two rubber rings 3 are arranged on the support rod 2, and the two rubber rings 3 can be moved to the corresponding sampling depth respectively. In the process of lowering the sampling container 1 in the water body, the corresponding pull ropes 4.1 can be pulled in turn to open the cover plate 5 for water sample collection, and water samples of different depths can be collected by using two or more chambers inside the sampling container 1.

[0051] Preferably, in this embodiment, Figure 3 As shown, a sealing gasket layer 13 is fixedly provided on the inner top surface of the barrel cover 1.2. After the barrel cover 1.2 is screwed and installed on the top of the sampling barrel 1.1, the sealing gasket layer 13 seals the gap between the top surface of the sampling barrel 1.1, the top surface of the partition 1.3 and the barrel cover 1.2, so that each chamber in the sampling container 1 is an independent closed chamber, avoiding mixing of water samples in each chamber.

[0052] The working principle of this embodiment is:

[0053] The collection device can collect water samples of two depths at one time by lowering the sampling container 1 into the water body. For example, when collecting water samples at a depth of 3m and 4m, the two rubber rings 3 are respectively moved to the corresponding scale lines on the support rod 2. In the process of lowering the sampling container 1 using the support rod 2, when the rubber ring 3 at a depth of 3m is flush with the water surface, one of the pull ropes 4.1 is pulled to flip open the cover 5, so that the water sample at the depth of 3m enters one of the chambers in the sampling container 1, and then the pull rope 4.1 is released, the cover 5 is reset to seal the water inlet 7, and the sampling container 1 is continued to be lowered until the rubber ring 3 at a depth of 4m is flush with the water surface, the other pull rope 4.1 is pulled to flip open the cover 5, so that the water sample at the depth of 4m enters the other chamber in the sampling container 1, and then the pull rope 4.1 is released, the cover 5 is reset to seal the water inlet 7, and the water samples at the depth of 3m and 4m are respectively collected using the two chambers in the sampling container 1, and then the sampling container 1 is lifted up to complete the sampling.

[0054] Example 3

[0055] A water sample collection device, which is different from Example 1 in that: Figures 4 to 6 As shown, the pulling mechanism 4 includes a pull rope 4.1 and a pull rod 4.3; the support rod 2 is a hollow rod-shaped structure, and a rope threading hole 14 communicating with the inside and outside is opened on its bottom side wall; the pull rod 4.3 is installed in the support rod 2, one end of the pull rope 4.1 is inserted into the rope threading hole 14 and fixedly connected to the bottom end of the pull rod 4.3, and the other end is fixed on the cover plate 5 at an end away from the hinge axis. Specifically, the rope threading hole 14 is a certain height away from the outer top surface of the sampling container 1, so that the pull rope 4.1 can pull the cover plate 5 to flip, and the height of the rope threading hole 14 should not be too high or too low. If its height is too high, it may not be able to pull the cover plate 5 to flip or the flipping angle of the cover plate 5 is small. If its height is too low, it may not be able to pull the cover plate 5 to flip; the top end of the pull rod 4.3 extends out of the top of the support rod 2 by a certain length and is equipped with a handle, which facilitates pulling the pull rod 4.3 upward in the support rod 2.

[0056] Preferably, in this embodiment, Figure 6 As shown, the support rod 2 is a combined structure composed of multiple hollow rod bodies 2.1 in series, and two adjacent hollow rod bodies 2.1 are threadedly connected, which is convenient for disassembly and assembly, and can be assembled into a support rod 2 of appropriate length according to the sampling depth; the pull rod 4.3 is a combined structure composed of multiple second rod bodies 4.3.1 in series, and two adjacent second rod bodies 4.3.1 are threadedly connected, which is convenient for disassembly and assembly, and can be assembled into a pull rod 4.3 of appropriate length according to the sampling depth and the length of the support rod 2; the length of each hollow rod body 2.1 and the second rod body 4.3.1 is 1.5m to 2m, which is easy to carry, and the lengths of the support rod 2 and the pull rod 4.3 can be freely combined to form a variety of water sampling combination schemes, which are suitable for underwater sampling in various water depth scenarios.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A water sample collection device, comprising a sampling container (1), wherein a chamber for containing a water sample is formed inside the sampling container (1), characterized in that: The top of the sampling container (1) is provided with a water inlet (7) communicating with the inside and outside, and a cover plate (5) for opening and closing the water inlet (7) is hingedly connected to the outer top surface of the top; It comprises a tension spring (8), one end of which is connected to the inside of the sampling container (1), and the other end of which passes through the water inlet (7) and is connected to the inner surface of the cover plate (5); in an initial state, the tension spring (8) is in a stretched state and the cover plate (5) covers the water inlet (7); a sealing gasket (6) is fixedly arranged on the inner surface of the cover plate (5); It comprises a support rod (2), the bottom end of which is fixed on the sampling container (1), the support rod (2) is used to send the sampling container (1) to a specified water depth, and the outer surface of the support rod (2) is provided with a plurality of scale lines distributed at equal intervals along its axial direction; It comprises a rubber ring (3) on the support rod (2) for marking the water depth with an elastic clamp, and the rubber ring (3) can move along the axial direction of the support rod (2); It also includes a lifting mechanism (4) connected to the cover plate (5) and used for pulling open the cover plate (5).

2. The water sample collection device according to claim 1, characterized in that: The sampling container (1) comprises a sampling barrel (1.1) and a barrel cover (1.2) threadedly connected to the top of the sampling barrel (1.1); a hanging ring (10) is welded to the inner bottom surface of the sampling barrel (1.1) and the inner surface of the cover plate (5); and both ends of the tension spring (8) are integrally formed with a hook portion (12) for hooking and connecting with the hanging ring (10).

3. The water sample collection device according to claim 1 or 2, characterized in that: The cover plate (5) is provided with a plurality of through holes at the outer side of the sealing gasket (6).

4. The water sample collection device according to claim 2, characterized in that: The bottom side wall of the sampling barrel (1.1) is provided with a drainage pipe, and a water stop valve (9) is provided on the drainage pipe.

5. The water sample collection device according to claim 2, characterized in that: The bottom end of the support rod (2) is fixed to the outer side wall of the sampling barrel (1.1) or the center of the outer top surface of the barrel cover (1.2).

6. The water sample collection device according to claim 1 or 2, characterized in that: A counterweight block (11) in the shape of a pointed cone is fixedly arranged on the outer bottom of the sampling container (1).

7. The water sample collection device according to claim 2, characterized in that: The pulling mechanism (4) comprises a pull rope (4.1) and a buckle (4.2) welded to the lower outer wall of the support rod (2); the pull rope (4.1) is inserted into the buckle (4.2), and the bottom end thereof is fixed to an end of the cover plate (5) away from the hinge axis.

8. The water sample collection device according to claim 7, characterized in that: The support rod (2) is a combined structure formed by a plurality of first rod sections connected in series, and two adjacent first rod sections are threadedly connected.

9. The water sample collection device according to claim 2, characterized in that: The lifting mechanism (4) comprises a pull rope (4.1) and a pull rod (4.3); the support rod (2) is a hollow rod-shaped structure, and a rope threading hole (14) communicating with the inside and outside is opened on the bottom side wall; the pull rod (4.3) is installed in the support rod (2), one end of the pull rope (4.1) is inserted into the rope threading hole (14) and fixedly connected to the bottom end of the pull rod (4.3), and the other end is fixed to the end of the cover plate (5) away from the hinge axis.

10. The water sample collection device according to claim 9, characterized in that: The support rod (2) is a combined structure formed by a plurality of hollow rod sections (2.1) connected in series, and two adjacent hollow rod sections (2.1) are threadedly connected; the pull rod (4.3) is a combined structure formed by a plurality of second rod sections (4.3.1) connected in series, and two adjacent second rod sections (4.3.1) are threadedly connected.

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