A river deep water sampling and detection device

Abstract

The present invention belongs to the field of water quality detection technology, and specifically refers to a river channel deep water sampling detection device, including a pressure cap, a hanging ring, an opening and closing guide mechanism and a water pressure conversion mechanism, wherein the hanging ring is threadedly connected to the outer wall of the pressure cap, the opening and closing guide mechanism is arranged below the hanging ring, and the water pressure conversion mechanism is arranged at the center of the opening and closing guide mechanism. The opening and closing guide mechanism uses water pressure to suck water into the sampling bottle, and the water pressure conversion mechanism can convert the underwater pressure into the initial power to drive the opening and closing guide mechanism to start water absorption. Through the cooperation of the water pressure conversion mechanism and the opening and closing guide mechanism, the present invention can open the sampling bottle for sampling only when it reaches the set water depth, so as to prevent the sampling bottle from sucking non-target water during the diving process, and multiple sampling bottles can also be placed on the opening and closing guide mechanism at the same time, so as to realize the simultaneous collection of multiple bottles of samples at the same depth.

Description

Technical Field

[0001] The invention belongs to the technical field of water quality detection, and specifically refers to a river deep water sampling and detection device. Background Art

[0002] Water conservancy departments need to regularly sample and test the water quality of rivers within their jurisdiction to ensure the health and stability of the river ecology. Water conservancy departments conduct sampling and testing in accordance with the "HJ494-2009 Water Quality Sampling Technical Guidelines" standard.

[0003] "HJ494-2009 Technical Guidelines for Water Quality Sampling" requires sampling personnel to take samples from the surface, middle and bottom layers of the river, and the number of layers can be appropriately increased according to the depth of the river. The water body after sampling needs to undergo multiple tests such as oil, BOD5, DO, sulfide, residual chlorine, fecal coliform group, suspended solids, radioactive substances, etc. Some test items can share a bottle of sample, while some test items require separate samples. Therefore, samplers need to collect multiple bottles of samples at the same water depth for testing. However, samplers have the following problems when performing deep water sampling operations:

[0004] 1. When the sampling bottle is submerged, the mouth of the bottle is open, which can easily suck water from different depths into the bottle, causing the water samples at different depths to mix and make the samples invalid. If the mouth of the bottle is sealed, it cannot be opened in deep water;

[0005] 2. When collecting multiple bottles of samples at the same water depth, it is necessary to ensure the consistency of the samples as much as possible and ensure that the sampling bottles are at the same water depth. The traditional sampling method is to tie the sampling bottles with ropes, throw the sampling bottles into the water, and collect one bottle at a time. In wild rivers, the extreme water depth can reach more than ten meters, and the flow rate in deep water is extremely unstable. Under different flow rates, the inclination angles of the sampling bottles and the ropes are inconsistent, which will produce large fluctuations and make the depths of the sampling bottles different. When there are differences in sampling depths, the consistency of the samples is poor.

[0006] Due to the above difficulties, during routine testing, sampling personnel will only give priority to collecting water samples close to the river surface for daily monitoring. The frequency of deep water testing is much lower than the frequency of surface water quality testing. This problem needs to be solved. Summary of the invention

[0007] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a river deep water sampling and detection device. Through the cooperation of the water pressure conversion mechanism and the opening and closing diversion mechanism, the sampling bottle can be opened for sampling only when it reaches the set water depth, thereby preventing the sampling bottle from sucking in non-target water bodies during the diving process. Multiple sampling bottles can also be placed on the opening and closing diversion mechanism at the same time, so that multiple bottles of samples can be collected at the same depth at the same time.

[0008] The technical solution adopted by the present invention is as follows: A river deep water sampling detection device proposed by the present invention includes a pressure cover, a hanging ring, an opening and closing guide mechanism and a water pressure conversion mechanism, the hanging ring is threadedly connected to the outer wall of the pressure cover, the opening and closing guide mechanism is arranged below the hanging ring, and the water pressure conversion mechanism is arranged at the center of the opening and closing guide mechanism; a sampling bottle is arranged on the upper wall of the opening and closing guide mechanism, and the number of sampling bottles can be increased or decreased as needed. The sampling bottle is pressed on the opening and closing guide mechanism by the action of the pressure cover to avoid a gap between the sampling bottle and the opening and closing guide mechanism. A counterweight ball is arranged in a circular array at the lower end of the opening and closing guide mechanism, and the counterweight ball can enable the detection device to move downward quickly and keep the pressure cover always on the top; the opening and closing guide mechanism uses water pressure to suck water into the sampling bottle, and the water pressure conversion mechanism can convert the underwater pressure into the initial power to drive the opening and closing guide mechanism to start absorbing water.

[0009] Furthermore, the water pressure conversion mechanism includes an upper fixed plate, a hook, a double-ear spring and a lower sliding cylinder, the upper fixed plate is arranged through the center of the upper wall of the opening and closing guide mechanism, the upper fixed plate is fixed to the opening and closing guide mechanism by a nut, the lower sliding cylinder is arranged below the upper fixed plate, the hooks are symmetrically arranged in the side walls on the opposite sides of the upper fixed plate and the lower sliding cylinder, the double-ear spring is connected between the upper fixed plate and the hooks in the lower sliding cylinder, the double-ear spring always pushes the lower sliding cylinder downward, the number of hooks and double-ear springs can be increased or decreased according to the water depth, the change of underwater pressure is positively linearly related to the water depth, preferably When the opening and closing diversion mechanism absorbs water for sampling, the elastic force generated by the compression deformation of each double-ear spring corresponds to the pressure exerted on the lower sliding cylinder when the depth increases by 0.5 meters. The forces generated by the two are balanced. For every 0.5 meter increase in water depth, the number of double-ear springs is increased by one, so that the compression deformation of all double-ear springs is the same no matter how deep they are. When the double-ear spring is compressed, it will drive the opening and closing diversion mechanism to work, and the sampling bottle will start to absorb water. At the same time, the hook and the lower sliding cylinder are preferably made of lightweight plastic parts to reduce the influence of gravity on the double-ear springs and reduce errors. The influence of this gravity error on depth can be ignored.

[0010] Furthermore, the opening and closing diversion mechanism includes a water collecting platform, a rubber pressure nozzle, a cone head touch rod and an opening and closing spring. The water collecting platform is arranged at the lower end of the lifting ring, the circular array of the rubber pressure nozzle is arranged on the upper wall of the water collecting platform, the circular array of the cone head touch rod is arranged outside the circular side wall of the water collecting platform, and the opening and closing spring is sleeved on the cone head touch rod. The cylindrical end of the cone head touch rod is in contact with the lower sliding cylinder. When the lower sliding cylinder moves up and down under the action of water pressure, the cone head touch rod expands and contracts in the horizontal direction to overcome the opening and closing spring.

[0011] Furthermore, a sealed cavity is provided at the central upper end of the water collecting platform, a trigger tube is provided at the lower end of the sealed cavity, the inner cavity of the trigger tube is hollow and communicated with the sealed cavity, a side guide column is provided in a circumferential array on the outer side of the water collecting platform, a right-angle frame is provided on the side of the side guide column close to the sealed cavity, an annular groove is provided on the inner side of the upper end of the trigger tube, a slide groove 1 is provided in an array on the circumferential side wall of the trigger tube, a slide groove 2 is provided on the right-angle frame, the cylindrical end of the cone head contact rod passes through the slide groove 1 and the slide groove 2, a drainage channel is provided in the side guide column, the upper end of the drainage channel is communicated with the rubber pressure nozzle, and a conical hole is provided on the side of the side guide column close to the right-angle frame, and the conical hole is connected to the rubber pressure nozzle. The drainage channel is connected; the lower sliding cylinder includes an upper boss and a lower boss, the upper fixed disk is arranged at the top of the sealing cavity, and the upper boss is slidably arranged in the sealing cavity. Under the action of the sealing cavity, a sealed space is formed between the upper boss and the upper fixed disk, and the air pressure in this space is conventional atmospheric pressure. The upper wall array of the upper boss is distributed with positioning grooves, and the hook is arranged in the positioning groove. The structure of the lower wall of the upper fixed disk is the same as that of the upper wall of the upper boss; the lower boss is arranged below the upper boss, and the middle part of the outer wall of the lower boss is provided with an arc groove, and the outer circumferential array of the upper wall of the lower boss is provided with a blocking ear. In the initial state, the blocking ear is at the bottom wall of the annular groove, between the annular groove and the inner cavity of the trigger cylinder. The step can position the lower sliding cylinder. When the lower sliding cylinder is in this position, the double-ear spring is in the initial state, and is neither subjected to pressure nor tension. The inner cavities of the lower boss and the upper boss are hollow, which can better reduce the load on the double-ear spring and maintain the linear relationship between the double-ear spring and the water depth pressure; the end of the opening and closing spring away from the side guide column is fixed on the right-angle frame, and the end of the opening and closing spring close to the side guide column is arranged at the cone head end of the cone head touch rod, and the cone head end of the cone head touch rod is adapted to the conical hole. When the two are fully fitted, they can be sealed to isolate the drainage channel from the outer water flow. When the water pressure applies an upward thrust to the lower boss, the arc groove moves upward. When it moves to the position aligned with When the cone head touch rod is at the appropriate height, the force of the double-ear spring and the water pressure reaches a balance, the lower boss no longer moves up, and the cone head touch rod retracts under the action of the opening and closing spring, so that the conical hole opens, and the external water enters the sampling bottle on the rubber pressure nozzle from the drainage channel under the action of water pressure. If the depth of the sampling bottle exceeds the set depth, the water pressure on the lower boss is relatively large, causing the double-ear spring to deform significantly, and the arc groove moves to the top of the cone head touch rod, and the cone head touch rod is squeezed outward again, so that the conical hole is sealed, and the external water cannot enter the drainage channel, and finally the effect of two-way locking sealing is achieved. When the water depth exceeds the set depth or does not reach the set depth, the sampling bottle will not take samples.

[0012] Furthermore, a support ring is provided in the inner circumferential array of the hanging ring, and the sampling bottle is arranged in the support ring. The support ring can keep the sampling bottle at a certain angle in the vertical direction to prevent the sampling bottle from tipping over during the process of tightening the pressure cover and the hanging ring. Lifting ears are symmetrically provided on the outer side wall of the hanging ring, and ropes are tied to the lifting ears. The sampling depth of the device is controlled by the ropes and the lifting ears, and the device is recovered.

[0013] The beneficial effects achieved by the present invention using the above structure are as follows:

[0014] 1. The water pressure conversion mechanism is positively correlated with the underwater pressure. When the water depth reaches the target depth, the underwater pressure drives the water pressure conversion mechanism to work, thereby opening the cone head touch rod on the opening and closing diversion mechanism, allowing the water sample at the current depth to enter the sampling bottle, thereby realizing fixed depth sampling;

[0015] 2. The water pressure conversion mechanism has a two-way locking function. It can not only lock the water above the set water depth to prevent the water above from entering the sampling bottle, but also lock the water below the set water depth to prevent the water below from entering the sampling bottle. When the sampling depth is too deep or too shallow, the sampling bottle will not take samples, and will only take samples at the set depth;

[0016] 3. Multiple sampling bottles can be placed above the opening and closing guide mechanism at the same time. Sampling personnel can place the required number of sampling bottles according to their needs to collect multiple bottles of samples at the same depth, ensuring the consistency of the samples;

[0017] 4. The number of double-ear springs on the water pressure conversion mechanism is positively correlated with the water pressure. By increasing or decreasing the number of double-ear springs, the sampling water depth can be set in advance. It is easy to operate and suitable for outdoor operations.

[0018] 5. The sampling bottle is pressed tightly against the rubber nozzle by the gland to keep the bottle mouth of the sampling bottle sealed to prevent water from entering prematurely during the sampling process. The sampling bottle can be replaced when the gland is loosened, which is convenient for the sampling personnel to choose different sampling bottles according to their needs;

[0019] 6. The support ring on the hanging ring can pre-support the sampling bottle to prevent the sampling bottle from tipping over during the tightening of the gland. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a river deep water sampling and detection device proposed by the present invention;

[0021] Figure 2 for Figure 1 A cross-sectional view of

[0022] Figure 3 for Figure 1 Exploded diagram of

[0023] Figure 4 It is a structural schematic diagram of a water pressure conversion mechanism;

[0024] Figure 5 is a cross-sectional view of a water pressure conversion mechanism;

[0025] Figure 6 is a cross-sectional view of the lower sliding cylinder;

[0026] Figure 7 It is a cross-sectional view of the opening and closing flow guiding mechanism;

[0027] Figure 8 is a cross-sectional view of the water collecting platform;

[0028] Fig. 9 for Figure 2 A magnified view of part I;

[0029] Fig.10 It is a schematic diagram of the structure of the lifting ring.

[0030] Among them, 1. pressure cover, 2. lifting ring, 3. opening and closing guide mechanism, 4. water pressure conversion mechanism, 5. counterweight ball, 6. sampling bottle, 7. upper fixed plate, 8. hook, 9. double-ear spring, 10. lower sliding cylinder, 11. upper boss, 12. lower boss, 13. positioning groove, 14. arc groove, 15. stop ear, 16. water collecting platform, 17. rubber pressure nozzle, 18. cone head touch rod, 19. opening and closing spring, 20. sealing chamber, 21. trigger cylinder, 22. side guide column, 23. right angle frame, 24. annular groove, 25. slide groove one, 26. slide groove two, 27. drainage channel, 28. conical hole, 29. support ring, 30. lifting ear.

[0031] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] like Figure 1-Figure 3As shown, a river channel deep water sampling detection device proposed by the present invention includes a pressure cover 1, a hanging ring 2, an opening and closing guide mechanism 3 and a water pressure conversion mechanism 4, the hanging ring 2 is threadedly connected to the outer wall of the pressure cover 1, the opening and closing guide mechanism 3 is arranged below the hanging ring 2, and the water pressure conversion mechanism 4 is arranged at the center of the opening and closing guide mechanism 3; a sampling bottle 6 is arranged on the upper wall of the opening and closing guide mechanism 3, and the number of the sampling bottles 6 can be increased or decreased as needed. The sampling bottle 6 is pressed on the opening and closing guide mechanism 3 by the action of the pressure cover 1 to avoid a gap between the sampling bottle 6 and the opening and closing guide mechanism 3. A counterweight ball 5 is arranged in a circular array at the lower end of the opening and closing guide mechanism 3. The counterweight ball 5 can enable the detection device to move downward quickly and keep the pressure cover 1 always on the top; the opening and closing guide mechanism 3 uses water pressure to suck water into the sampling bottle 6, and the water pressure conversion mechanism 4 can convert the underwater pressure into the initial power to drive the opening and closing guide mechanism 3 to start absorbing water.

[0035] like Figure 4 and Figure 5 As shown, the water pressure conversion mechanism 4 includes an upper fixed plate 7, a hook 8, a double-ear spring 9 and a lower sliding cylinder 10. The upper fixed plate 7 is arranged through the center of the upper wall of the opening and closing guide mechanism 3. The upper fixed plate 7 is fixed to the opening and closing guide mechanism 3 by a nut (not marked in the figure), and the lower sliding cylinder 10 is arranged below the upper fixed plate 7. The hook 8 is symmetrically arranged in the side walls on the opposite sides of the upper fixed plate 7 and the lower sliding cylinder 10, respectively. The double-ear spring 9 is connected between the upper fixed plate 7 and the hook 8 in the lower sliding cylinder 10. The double-ear spring 9 always pushes the lower sliding cylinder 10 downward. The number of the hook 8 and the double-ear spring 9 can be increased or decreased according to the water depth. The change of underwater pressure is positively linear with the water depth. Related, preferably, when the opening and closing guide mechanism 3 absorbs water for sampling, the elastic force generated by the compression deformation of each double-ear spring 9 corresponds to the pressure exerted on the lower sliding cylinder 10 when the depth increases by 0.5 meters, and the forces generated by the two are balanced. For every 0.5 meter increase in water depth, the number of double-ear springs 9 is increased by one, so that the compression deformation of all double-ear springs 9 is the same no matter how deep they are. When the double-ear springs 9 are compressed, they will drive the opening and closing guide mechanism 3 to work, so that the sampling bottle 6 starts to absorb water; at the same time, the hook 8 and the lower sliding cylinder 10 are preferably lightweight plastic parts to reduce the influence of gravity on the double-ear springs 9 and reduce errors. The influence of this gravity error on the depth can be ignored.

[0036] like Figure 3 and Figure 7As shown, the opening and closing diversion mechanism 3 includes a water collecting platform 16, a rubber pressure nozzle 17, a cone head touch rod 18 and an opening and closing spring 19. The water collecting platform 16 is arranged at the lower end of the lifting ring 2, the rubber pressure nozzle 17 is arranged in a circular array on the upper wall of the water collecting platform 16, the cone head touch rod 18 is arranged in a circular array outside the circumferential side wall of the water collecting platform 16, and the opening and closing spring 19 is sleeved on the cone head touch rod 18. The cylindrical end of the cone head touch rod 18 is in contact with the lower sliding cylinder 10. When the lower sliding cylinder 10 moves up and down under the action of water pressure, the cone head touch rod 18 expands and contracts in the horizontal direction to overcome the opening and closing spring 19.

[0037] like Figure 6-Figure 9As shown, a sealed cavity 20 is provided at the center upper end of the water collecting platform 16, a trigger cylinder 21 is provided at the lower end of the sealed cavity 20, the inner cavity of the trigger cylinder 21 is hollow and communicated with the sealed cavity 20, a side guide column 22 is provided in a circumferential array on the outer side of the water collecting platform 16, a right angle frame 23 is provided on the side of the side guide column 22 close to the sealed cavity 20, an annular groove 24 is provided on the inner side of the upper end of the trigger cylinder 21, a slide groove 1 25 is provided in an array on the circumferential side wall of the trigger cylinder 21, a slide groove 26 is provided on the right angle frame 23, the cylindrical end of the cone head feeler rod 18 passes through the slide groove 1 25 and the slide groove 26, a drainage channel 27 is provided in the side guide column 22, the upper end of the drainage channel 27 is communicated with the rubber pressure nozzle 17, and a conical hole 28 is provided on the side of the side guide column 22 close to the right angle frame 23. The drainage channel 27 is connected; the lower sliding cylinder 10 includes an upper boss 11 and a lower boss 12, the upper fixed disk 7 is arranged at the top of the sealing cavity 20, and the upper boss 11 is slidably arranged in the sealing cavity 20. Under the action of the sealing cavity 20, a sealed space is formed between the upper boss 11 and the upper fixed disk 7, and the air pressure in this space is the conventional atmospheric pressure. The upper wall array of the upper boss 11 is distributed with positioning grooves 13, and the hook 8 is arranged in the positioning groove 13. The structure of the lower wall of the upper fixed disk 7 is the same as that of the upper wall of the upper boss 11; the lower boss 12 is arranged below the upper boss 11, and the middle part of the outer wall of the lower boss 12 is provided with an arc groove 14, and the outer circumferential array of the upper wall of the lower boss 12 is provided with a stop ear 15. In the initial state, the stop ear 15 is at the bottom wall of the annular groove 24, and the annular groove 24 is in contact with the trigger cylinder 21 The step between the cavities can position the lower sliding cylinder 10. When the lower sliding cylinder 10 is in this position, the double-ear spring 9 is in the initial state, and is neither subjected to pressure nor tension. The inner cavities of the lower boss 12 and the upper boss 11 are hollow, which can better reduce the load on the double-ear spring 9 and maintain the linear relationship between the double-ear spring 9 and the water depth pressure; the end of the opening and closing spring 19 away from the side guide column 22 is fixed on the right-angle frame 23, and the end of the opening and closing spring 19 close to the side guide column 22 is arranged at the conical head end of the conical head touch rod 18. The conical head end of the conical head touch rod 18 is adapted to the conical hole 28. When the two are fully fitted, they can be sealed to isolate the drainage channel 27 from the outer water flow. When the water pressure applies an upward thrust to the lower boss 12, the arc groove 14 moves upward. When it moves to the position aligned with When the cone head touch rod 18 is at the appropriate height, the force of the double ear spring 9 and the water pressure reaches a balance, the lower boss 12 no longer moves up, and the cone head touch rod 18 retracts under the action of the opening and closing spring 19, so that the conical hole 28 is opened, and the external water enters the sampling bottle 6 on the rubber pressure nozzle 17 from the drainage channel 27 under the action of water pressure. If the depth of the sampling bottle 6 exceeds the set depth, the water pressure on the lower boss 12 is relatively large, causing the double ear spring 9 to produce a large deformation, and the arc groove 14 moves to the top of the cone head touch rod 18, and the cone head touch rod 18 is squeezed outward again, so that the conical hole 28 is sealed, and the external water cannot enter the drainage channel 27, and finally the effect of two-way locking sealing is achieved. When the water depth exceeds the set depth or does not reach the set depth, the sampling bottle 6 will not take samples.

[0038] like Figure 3 and Fig.10 As shown, a support ring 29 is provided in an inner circumferential array of the hanging ring 2, and the sampling bottle 6 is arranged in the support ring 29. The support ring 29 can keep the sampling bottle 6 at a certain angle in the vertical direction to prevent the sampling bottle 6 from tipping over during the process of tightening the pressure cover 1 and the hanging ring 2. Lifting ears 30 are symmetrically provided on the outer wall of the hanging ring 2. Ropes are tied to the lifting ears 30. The sampling depth of the device is controlled by the ropes and the lifting ears 30, and the device is recovered.

[0039] Embodiment 1:

[0040] During specific work, a corresponding number of double-ear springs 9 are selected according to the water depth to be sampled. In the present embodiment, the number of double-ear springs 9 needs to be increased by one for every 0.5 meter increase in water depth. The water depth is positively correlated with the number of double-ear springs 9. The number of double-ear springs 9 must meet the following requirements: after the pressure exerted on the lower sliding cylinder 10 at the set water depth position is transmitted to the double-ear springs 9, all the double-ear springs 9 will undergo a certain amount of compression deformation, thereby driving the lower sliding cylinder 10 to move upward. This displacement will make the center height of the arc groove 14 consistent with the center height of the cone head touch rod 18.

[0041] After selecting the number of double-ear springs 9, double the number of hooks 8 are symmetrically installed in the positioning grooves 13 in the upper fixed plate 7 and the lower sliding cylinder 10, and the double-ear springs 9 are hung on the hooks 8 in turn, and then the upper fixed plate 7 is fixed to the top of the sealed cavity 20 of the water collecting platform 16. When fixing, the lower sliding cylinder 10 should be rotated by a certain angle so that the blocking ear 15 slides along the direction of the slide groove 25 until the blocking ear 15 reaches the bottom wall position of the annular groove 24, and then the entire water pressure conversion mechanism 4 is rotated so that the blocking ear 15 is staggered with the slide groove 25, and the lower sliding cylinder 10 is fixed by the bottom wall of the annular groove 24 and cannot slide down. At this position, all the double-ear springs 9 are in the initial state without any deformation; after the lower sliding cylinder 10 is fixed, the cone head contact rod 18 is pushed outward by the side wall of the lower sliding cylinder 10, so that the cone head end of the cone head contact rod 18 is sealed with the cone hole 28, so that the drainage channel 27 is isolated from the outside.

[0042] Then, select sampling bottles 6 of corresponding materials and quantities according to the items to be tested, pass the sampling bottle 6 through the support ring 29, keep the opening facing downward and buckle it on the rubber nozzle 17, then screw the pressure cover 1 into the inner hole of the lifting ring 2, the sampling bottle 6 gradually stands upright, and fits tightly with the rubber nozzle 17 under the action of the pressure cover 1, then pass the rope through the lifting ears 30 on both sides, and throw the device into the river.

[0043] When the rope reaches the sampling depth, the rope is released, and the device is placed in the river for a period of time and then lifted up. At this time, the sampling bottle 6 will be full of water samples, and all samples are sampled at the same set depth, so the sample consistency is good.

[0044] Embodiment 2:

[0045] When the device is placed in the river to absorb water, the water pressure conversion mechanism 4 starts to work, and the water pressure generates an upward pressure on the lower sliding cylinder 10, causing the lower sliding cylinder 10 to move toward the double-ear spring 9 and compress the double-ear spring 9. When the elastic force of the double-ear spring 9 is the same as the pressure on the lower sliding cylinder 10, the lower sliding cylinder 10 no longer moves upward. At this time, the arc groove 14 on the lower boss 12 moves to a height that matches the center of the cone head contact rod 18. The cone head contact rod 18 moves toward the center of the arc groove 14 under the action of the opening and closing spring 19, and the cone head end of the cone head contact rod 18 is separated from the conical hole 28, and the drainage channel 27 is connected to the external water body. The water body flows into the drainage channel 27 under the action of the water pressure and is sprayed into the sampling bottle 6 from the rubber nozzle 17 until no more water enters the sampling bottle 6.

[0046] During this process, if the device does not reach the sampling depth, the pressure on the lower sliding cylinder 10 is relatively small, the displacement of the lower sliding cylinder 10 is insufficient, the height of the cone head touch rod 18 and the arc groove 14 do not match, the conical hole 28 is still in a closed state, and the drainage channel 27 will not enter water; if the device depth exceeds the set requirements, the pressure on the lower sliding cylinder 10 is relatively large, the displacement of the lower sliding cylinder 10 exceeds, the arc groove 14 will pass over the cone head touch rod 18 to the top, and the conical hole 28 will remain closed, thereby achieving a two-way locking effect. When the water depth exceeds or does not reach the set requirements, the conical hole 28 will not open for sampling, thereby ensuring the accuracy of the sampling.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

[0049] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A river deep water sampling and detection device, characterized in that: It comprises a gland (1), a hanging ring (2), an opening and closing flow guiding mechanism (3) and a water pressure conversion mechanism (4), wherein the hanging ring (2) is threadedly connected to the outer wall of the gland (1), the opening and closing flow guiding mechanism (3) is arranged below the hanging ring (2), and the water pressure conversion mechanism (4) is arranged at the center of the opening and closing flow guiding mechanism (3); The water pressure conversion mechanism (4) comprises an upper fixed plate (7), a hook (8), a double-ear spring (9) and a lower sliding cylinder (10); the upper fixed plate (7) is arranged through the center of the upper wall of the opening and closing guide mechanism (3); the lower sliding cylinder (10) is arranged below the upper fixed plate (7); the hook (8) is symmetrically arranged in the side walls of the upper fixed plate (7) and the lower sliding cylinder (10) on opposite sides; the double-ear spring (9) is connected between the upper fixed plate (7) and the hook (8) in the lower sliding cylinder (10); The upper wall of the opening and closing flow guiding mechanism (3) is provided with a sampling bottle (6), and the lower end of the opening and closing flow guiding mechanism (3) is provided with a circumferential array of weighted balls (5); The opening and closing flow guiding mechanism (3) comprises a water collecting platform (16), a rubber pressure nozzle (17), a cone head touch rod (18) and an opening and closing spring (19); the water collecting platform (16) is arranged at the lower end of the hanging ring (2); the circumferential array of the rubber pressure nozzle (17) is arranged on the upper wall of the water collecting platform (16); the circumferential array of the cone head touch rod (18) is arranged outside the circumferential side wall of the water collecting platform (16); the opening and closing spring (19) is sleeved on the cone head touch rod (18); a sealing cavity (20) is arranged at the upper center end of the water collecting platform (16); a trigger tube (21) is arranged at the lower end of the sealing cavity (20); the outer circumferential array of the water collecting platform (16) is arranged on the outer circumferential side wall of the water collecting platform (16); and the opening and closing spring (19) is sleeved on the cone head touch rod (18). A side flow guide column (22) is arranged in a row, a right angle frame (23) is arranged on the side of the side flow guide column (22) close to the sealing cavity (20), an annular groove (24) is arranged on the inner side of the upper end of the trigger tube (21), a slide groove 1 (25) is arranged in an array on the circumferential side wall of the trigger tube (21), a slide groove 2 (26) is arranged on the right angle frame (23), a drainage channel (27) is arranged in the side flow guide column (22), the upper end of the drainage channel (27) is communicated with the rubber pressure nozzle (17), a conical hole (28) is arranged on the side of the side flow guide column (22) close to the right angle frame (23), and the conical hole (28) is communicated with the drainage channel (27); The cylindrical end of the cone-head contact rod (18) passes through the first slide groove (25) and the second slide groove (26) and contacts the lower slide cylinder (10); The lower sliding cylinder (10) comprises an upper boss (11) and a lower boss (12), the upper fixed plate (7) is arranged at the top of the sealing cavity (20), the upper boss (11) is slidably arranged in the sealing cavity (20), the upper wall of the upper boss (11) is provided with positioning grooves (13) in an array, and the hook (8) is arranged in the positioning groove (13); The lower boss (12) is arranged below the upper boss (11), a circular arc groove (14) is arranged in the middle of the outer wall of the lower boss (12), and stop ears (15) are arranged in a circular array on the outer circumference of the upper wall of the lower boss (12); One end of the opening and closing spring (19) away from the side guide column (22) is fixed on the right angle frame (23), and one end of the opening and closing spring (19) close to the side guide column (22) is arranged on the conical end of the conical head contact rod (18), and the conical head end of the conical head contact rod (18) is adapted to the conical hole (28); The circular arc groove (14) and the cone head contact rod (18) cooperate with each other to realize the bidirectional locking of the water pressure conversion mechanism (4), and when the water depth exceeds the set depth or does not reach the set depth, the sampling bottle (6) will not collect samples.

2. A river channel deep water sampling and detection device according to claim 1, characterized in that: The inner circumference array of the hanging ring (2) is provided with a support ring (29), the sampling bottle (6) is arranged in the support ring (29), and the outer side wall of the hanging ring (2) is symmetrically provided with hanging ears (30).

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