A mobile low-disturbance precise water quality sampler for river channels

Abstract

The present invention relates to the technical field of sampling devices, and discloses a mobile low-disturbance precise river water quality sampler, which includes a sampling part. The sampling part includes a sampling bottle. The top of the sampling bottle is threadedly connected with a bottle cap fixedly connected to the lower end of the depth control part. A protection part for buffering the impact force of the sampling part when entering the water is sleeved outside the sampling bottle. The protection part includes positioning rings arranged up and down, and the positioning rings are elastically connected by a telescopic spring arranged in the middle. A floating plate is slidably connected to the outside of the positioning rings. The invention is provided with a protection part, and the protection part is set to be a structure that deforms with the change of the depth of the sampling part entering the river. When the sampling part just enters the river, the lower positioning ring in the open state moves upward under the action of the water resistance. The higher the depth of the sampling part entering the water, the closer the lower positioning ring is to the upper positioning ring, realizing the stable downward movement of the sampling part and buffering the impact force of the sampling part on the water body during the falling process.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling devices, and particularly to a mobile low-disturbance precise river water quality sampler. Background Art

[0002] A water quality sampler is a device for collecting water quality samples. There are many defects in the existing water quality sampling and detection equipment. The sampler causes severe impact and agitation when entering the water body because of its own inertia, high entry speed, irregular shape, as well as the density difference between water and air and the surface tension of the water body. The combined effect of these factors leads to the impact and agitation phenomenon.

[0003] The severe impact and agitation of the sampler will destroy the originally stratified temperature structure inside the water body. For example, in some lakes or reservoirs, there is a thermocline, with higher water temperature in the upper layer and lower water temperature in the lower layer. If the sampler strongly agitates the water body and the upper and lower layer waters are mixed, the measured water temperature cannot accurately reflect the temperature of the original water body stratification. This temperature change may affect subsequent research on the thermal condition of the water body and some temperature-dependent physical and chemical processes. At the same time, the impact and agitation will resuspend the sediments at the bottom of the water body. For example, the sediment accumulated at the bottom of a river will be lifted up when the sampler agitates the water body, greatly increasing the turbidity of the water body. This not only interferes with the measurement of indicators related to the clarity of the raw water. From the perspective of water quality analysis, the severe impact and agitation will also change the distribution of dissolved oxygen in the water body. The oxygen-rich water on the surface layer and the relatively oxygen-deficient water in the deep layer will be quickly mixed, which may cause abnormal fluctuations in the dissolved oxygen content in local areas of the water body. The impact and agitation phenomenon interfere with the accuracy of subsequent water sample detection, making the detection results unable to truly reflect the concentration and distribution of various substances in the water body in the normal state. Summary of the Invention

[0004] Technical Problem to be Solved

[0005] In view of the above-mentioned drawbacks of the prior art, the present invention provides a mobile low-disturbance precise river water quality sampler, which can effectively solve the problem that the sampler in the prior art causes impact and agitation to the sampling water area during the water entry and sampling processes.

[0006] Technical Solution

[0007] To achieve the above object, the present invention is realized through the following technical solutions:

[0008] The present invention provides a mobile low-disturbance precise river water quality sampler, including: a depth control part;

[0009] Sampling unit, the lower end of the depth control unit is fixedly connected to the upper end of the sampling unit. The sampling unit includes a sampling bottle. The top of the sampling bottle is threadedly connected to a bottle cap fixedly connected to the lower end of the depth control unit. A protection unit for buffering the impact force of the sampling unit when entering the water is sleeved outside the sampling bottle. The protection unit includes positioning rings arranged up and down, and the positioning rings are elastically connected by a telescopic spring arranged in the middle. A floating plate is slidably connected to the outside of the positioning rings;

[0010] Wherein, a suction member for controlling the position of the floating plate on the outer surface of the positioning ring is arranged on the surface of the positioning ring.

[0011] Further, the upper positioning ring is fixedly connected to the upper part of the circumferential outer surface of the sampling bottle. Grooves are provided on the outer sides of the upper and lower positioning rings, and a plurality of fixing grooves are evenly arranged on the inner sides of the grooves. A fixing rod is slidably connected to the inner wall of the fixing groove, and one end of the fixing rod far away from the center of the positioning ring is fixedly connected to the floating plate.

[0012] Further, the protection unit further includes a second wedge block fixedly connected to the distal end of the fixing rod close to the center of the positioning ring. The other side of the second wedge block is elastically connected to an elastic member. The second wedge block and the elastic member are both located in a movable groove arranged on the inner wall of the positioning ring, and a suction member is attached to the upper surface of the second wedge block.

[0013] Further, the suction member of the upper positioning ring is located at the bottom end, and the suction member of the lower positioning ring is located at the top end. The suction members of the upper and lower positioning rings are symmetrically arranged, and the suction members enter each other's magnetic field space when the compression size of the telescopic spring is the smallest.

[0014] Further, the suction member includes a first wedge block attached to the upper surface of the second wedge block. A positioning rod is fixedly connected to the top end of the first wedge block. A compression spring is sleeved outside the positioning rod, and a magnetic member is fixedly connected to the top end of the compression spring. In the initial state, the lower surface of the magnetic member is flush with the upper surface of the positioning ring.

[0015] Further, a sampling head is fixedly connected to the bottom end of the sampling bottle. A buffer member is arranged at the position of the bottom end of the inner cavity of the sampling bottle above the sampling head. A buffer groove is provided on the inner wall of the buffer member, and a side slot opening is provided on the side of the buffer groove.

[0016] Further, in the initial state, the lower surface of the lower positioning ring is higher than the bottom end of the sampling head.

[0017] Advantageous effects

[0018] The technical solution provided by the present invention has the following advantageous effects compared with the prior art:

[0019] The present invention is provided with a sampling bottle and a bottle cap. The sampling head is conical, and the side that first contacts the water surface has a small diameter dimension. When the device enters the water, the physical impact force generated is small, and the displacement effect on the water body is weak. It can accurately sample in a fine research scenario, and has a low risk of physical damage to aquatic organisms and a narrow range of behavior interference. The top of the sampling bottle is threadedly connected with the bottle cap, and the sampling bottle and the bottle cap are detachably connected. After the device completes the sampling process, by rotating the bottle cap, the sampling bottle and the bottle cap can be separated. The staff can comprehensively clean the inner wall of the sampling bottle, and at the same time can conduct a detailed inspection on each part to check for damage, blockage or corrosion. For the components with problems found, they can be repaired or replaced individually, without the need for complex operations on the entire cylindrical device, which helps to improve the maintenance efficiency of the device.

[0020] The present invention is provided with a buffer member. The side slot divides the water body poured into the buffer tank. The poured water body enters the side slot of the elbow section from the buffer tank such as the straight pipe section. On the side of the side slot, the liquid is affected by the centrifugal force and has a tendency to squeeze outward. Inside the elbow, the flow of the liquid is blocked and the flow rate will decrease. At the same time, under the blocking action of the inner wall of the buffer member, the liquid directly poured into the inner wall of the buffer member will also be divided by the side slot, so that the entity poured into the sampling bottle is stable and slow during sampling, reducing the impact of the water flow on the internal components of the sampling bottle, and avoiding the abrasion of the internal components of the sampler by impurities such as sand grains and small stones in the water flow acting like abrasives at high flow rates.

[0021] The present invention is provided with a suction member. In the initial state, the first wedge block located at the bottom end of the movable slot is in close contact with the upper surface of the second wedge block. Through the action of the wedge structure, the first wedge block squeezes the second wedge block. Due to the squeezing force, the second wedge block overcomes the elastic force of the elastic member and drives the fixed rod to move away from the center of the positioning ring. The movement of the fixed rod drives the floating plate to move, and the floating plate moves out of the inner side of the groove. The cross-sectional area of the structure formed by the positioning ring and the floating plate is larger than the cross-sectional area between them when the floating plate is located inside the groove. The larger the cross-sectional area, the larger the contact surface with the water body. After the sampling head contacts the water surface, the positioning ring below also contacts the water surface, avoiding the impact caused by the overall fall of the sampling part into the water surface, and avoiding the destruction of the original stratified temperature structure inside the water body and abnormal fluctuations in the dissolved oxygen content in a local area of the water body. Reducing the interference of impact and agitation phenomena allows the detection results to accurately reflect the concentration and distribution of various substances in the water body under normal conditions.

[0022] The present invention is provided with a protection part, which is configured to deform as the depth of the sampling part entering the river channel changes. When the sampling part just enters the river channel, the lower positioning ring in the open state moves upward under the action of water resistance. As the sampling part enters the water deeper, the lower positioning ring gets closer to the upper positioning ring, realizing the stable downward movement of the sampling part, buffering the impact force of the sampling part on the water body during the falling process. Then, after the two positioning rings are attracted to each other, the telescopic spring is no longer located outside the positioning ring, but is embedded in the groove outside the positioning ring. The reduction of the cross-sectional area of the protection part reduces the resistance of the water body to the protection part, enabling the sampling part and the protection part to completely enter the interior of the river channel, achieving the purpose of the sampling part smoothly entering the corresponding position of the river channel, and avoiding the situation that the sampling water area is impacted and stirred during the process of the device entering the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 Structural schematic diagram of the device of the embodiment of the present invention completely entering the river channel;

[0025] Figure 2 Structural schematic diagram of the initial state of the protection part of the embodiment of the present invention;

[0026] Figure 3 Structural schematic diagram of the separation of the positioning ring and a single floating plate of the embodiment of the present invention;

[0027] Figure 4 Structural schematic diagram of the separation of the positioning ring and a single attracting part of the embodiment of the present invention;

[0028] Figure 5 Structural schematic diagram of the cross-section of the sampling part of the embodiment of the present invention;

[0029] Figure 6 Structural schematic diagram of the cross-section of the buffer part of the embodiment of the present invention.

[0030] The reference numerals in the drawings respectively represent: 1. Sampling part; 11. Sampling bottle; 12. Sampling head; 13. Bottle cap; 14. Buffer part; 141. Buffer groove; 142. Side notch; 2. Protection part; 21. Positioning ring; 211. Fixed groove; 22. Fixed rod; 23. Floating plate; 25. Telescopic spring; 26. Attracting part; 261. Magnetic part; 262. Compression spring; 263. Fixed rod; 264. First wedge block; 27. Second wedge block; 28. Elastic part; 3. Depth control part. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] The present invention will be further described below with reference to the embodiments.

[0033] Embodiment:

[0034] Please refer to Figures 1-6 , the present invention provides a technical solution: referring to Figure 1 , the device includes a sampling unit 1, a protection unit 2 and a depth control unit 3. The protection unit 2 is arranged on the outer surface of the sampling unit 1, and the depth control unit 3 is fixedly connected to the top end of the protection unit 2. As shown in Figure 5 , the sampling unit 1 includes a sampling bottle 11 for storing the sampled water body. The bottom end of the sampling bottle 11 is fixedly connected with a sampling head 12. The sampling head 12 is arranged in a conical shape, and the side that first contacts the water surface has a small diameter dimension. When the device enters the water, the physical impact force generated is small, and the displacement effect on the water body is weak. It can accurately sample in a fine research scenario, and the risk of physical damage to aquatic organisms is low, and the range of interference with their behavior is narrow. The top end of the sampling bottle 11 is threadedly connected with a bottle cap 13. The sampling bottle 11 and the bottle cap 13 are detachably connected. After the device completes the sampling process, by rotating the bottle cap 13, the sampling bottle 11 and the bottle cap 13 can be separated from each other. The staff can comprehensively clean the inner wall of the sampling bottle 11, and at the same time can conduct a detailed inspection on each part to check whether there are damages, blockages or corrosions. For the components with problems found, they can be repaired or replaced individually, without the need for complex operations on the entire cylindrical device, which helps to improve the maintenance efficiency of the device.

[0035] Such as Figure 5 and Figure 6As shown in the figure, a buffer member 14 is fixedly connected directly above the sampling head 12. A buffer groove 141 is formed inside the buffer member 14. After the sampling head 12 is opened, the water in the corresponding area will enter the inside of the buffer groove 141 through the sampling head 12. A side notch 142 is formed on the side of the buffer groove 141. The side notch 142 performs a diversion operation on the water poured into the inside of the buffer groove 141. The poured water enters the side notch 142 like a bent pipe section from the buffer groove 141 like a straight pipe section. On the side of the side notch 142, the liquid is affected by the centrifugal force and has a tendency to be extruded outward. Inside the bent pipe, the flow of the liquid is blocked and the flow rate will decrease. At the same time, under the blocking action of the inner wall of the buffer member 14, the liquid directly poured onto the inner wall of the buffer member 14 will also be diverted by the side notch 142, so that the entity poured into the sampling bottle 11 is stable and slow during sampling, reducing the impact of the water flow on the internal components of the sampling bottle 11, and avoiding impurities in the water flow such as sand grains and small stones from wearing the internal components of the sampler like a grinding agent at high flow rates.

[0036] With the setting of the sampling part 1, the disturbance to the river water body during the water intake process is extremely small. For example, the sampling head 12 adopts a slow suction design, avoiding violent impact and agitation on the water body, and can maintain the original state of the water sample to the greatest extent, ensuring that the collected water quality data truly reflects the actual situation of the river. The low-disturbance sampling method reduces the interference and impact on aquatic organisms in the river, and will not damage the habitat environment and survival state of aquatic organisms, which is of great significance for protecting the water ecological environment.

[0037] Reference Figure 1 and Figure 2 , a protection part 2 is sleeved on the outer circumferential surface of the sampling part 1. In the initial state, the protection part 2 is as Figure 2 shown. After the sampling part 1 completely enters the river water body, the structural state of the protection part 2 is as Figure 1 shown. The protection part 2 includes two positioning rings 21 distributed up and down. The upper positioning ring 21 is fixedly connected to the upper part of the outer surface of the protection part 2. A plurality of suction members 26 are uniformly arranged at the bottom end of the upper positioning ring 21, and here four are set. In the initial state, the bottom end of the lower positioning ring 21 is slightly higher than the bottom end of the bottle cap 13. Four other suction members 26 magnetically connected to the four suction members 26 arranged at the bottom end of the upper positioning ring 21 are uniformly arranged at the top end of the lower positioning ring 21. A telescopic spring 25 is elastically connected between the upper positioning ring 21 and the lower positioning ring 21.

[0038] As Figure 2 and Figure 3As shown, a groove for storing the floating plate 23 in a contracted state is provided on the side of the positioning ring 21, and four fixing grooves 211 are evenly provided in the groove. A fixing rod 22 is slidably connected inside the fixing groove 211. One end of the fixing rod 22 away from the positioning ring 21 is fixedly connected to the floating plate 23. The floating plate 23 is made of a material with a density less than that of the positioning ring 21. In the initial state, the floating plate 23 is away from the fixing groove 211, and the cross-sectional area between the positioning ring 21 and the floating plate 23 is relatively large. When the sampling part 1 enters the water and the water body contacts the positioning ring 21, the positioning ring 21 will move upward under the push of the surface tension of the water. The lower positioning ring 21 moves upward and compresses the telescopic spring 25. The telescopic spring 25 undergoes elastic deformation under the pressure. The other end of the fixing rod 22 is fixedly connected to the second wedge block 27, and the other end of the second wedge block 27 is elastically connected to the elastic member 28.

[0039] As Figure 2 , Figure 3 and Figure 4 shown, a circular groove is provided on the surface of the positioning ring 21, and a suction member 26 is provided inside the circular groove. The suction member 26 includes a compression spring 262 elastically connected to the circular groove. The compression spring 262 is sleeved outside the positioning rod 263. The top end of the positioning rod 263 is fixedly connected to a magnetic member 261. The two sets of magnetic members 261 arranged up and down enter each other's magnetic induction range when the telescopic spring 25 is compressed to the minimum. The magnetic members 261 attract each other. The bottom end of the magnetic member 261 is fixedly connected to a first wedge block 264, and the first wedge block 264 is located in the activity groove provided inside the positioning ring 21.

[0040] In the initial state, the first wedge block 264 located at the bottom end of the activity groove is in close contact with the upper surface of the second wedge block 27. Through the action of the wedge structure, the first wedge block 264 squeezes the second wedge block 27. Due to the squeezing force, the second wedge block 27 overcomes the elastic force of the elastic member 28 and drives the fixing rod 22 to move away from the center of the positioning ring 21. The movement of the fixing rod 22 drives the movement of the floating plate 23, and the floating plate 23 moves out from the inside of the groove. The cross-sectional area of the structure formed by the positioning ring 21 and the floating plate 23 is larger than the cross-sectional area between the two when the floating plate 23 is inside the groove. The larger the cross-sectional area, the larger the contact area with the water body. After the sampling head 12 contacts the water surface, the lower positioning ring 21 also contacts the water surface, avoiding the impact caused by the overall fall of the sampling part 1 into the water surface, and avoiding the destruction of the original layered temperature structure inside the water body and abnormal fluctuations in the dissolved oxygen content in a local area of the water body. Reducing the interference of impact and agitation phenomena allows the detection results to truly and accurately reflect the concentration and distribution of various substances in the water body under normal conditions.

[0041] With the deployment of the device, the larger the cross-section of the object, the greater the water resistance it may encounter during the water entry process. The lower positioning ring 21 and the telescopic spring 25 move upward under the pushing force of the reverse acting force of the water body. The upward movement of the positioning ring 21 squeezes the telescopic spring 25. As the device is put in, the squeezing of the telescopic spring 25 by the lower positioning ring 21 gradually increases until the telescopic spring 25 contracts to the minimum size. At this time, the magnetic members 261 above and below enter each other's magnetic field space, and the two magnetic members 261 attract each other. The magnetic member 261 of the upper positioning ring 21 moves downward, and the magnetic member 261 of the lower positioning ring 21 moves upward. The magnetic member 261 drives the positioning rod 263 to move. The positioning rod 263 overcomes the elastic force of the compression spring 262 under the action of the magnetic attraction force and quickly engages with each other. At the same time, the first wedge block 264 moves upward and no longer squeezes the second wedge block 27. The elastic member 28 returns to its original shape elastically, and the elastic member 28 drives the second wedge block 27 to move towards the center of the positioning ring 21. The movement of the second wedge block 27 drives the fixed rod 22 to move, and the movement of the fixed rod 22 drives the floating plate 23 to move. The floating plate 23 moves until it is embedded inside the groove, thereby Figure 2 the protection part 2 in the Figure 1 state is transformed into the protection part 2 in the

[0042] state. The cross-sectional area of the structure between the positioning ring 21 and the floating plate 23 is reduced to the cross-sectional area of the positioning ring 21 itself. At this time, the sampling part 1 almost completely enters the river water body. After the cross-sectional area decreases, the water resistance also decreases. The entire sampling part 1, the protection part 2 in the contracted state, and the depth control part 3 gradually enter the water body, and the water sampling operation is started.

[0043] 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mobile low-disturbance precise water quality sampler for river channels, characterized in that, Comprising: A depth control part (3); A sampling part (1), the lower end of the depth control part (3) is fixedly connected to the upper end of the sampling part (1). The sampling part (1) includes a sampling bottle (11), the top of the sampling bottle (11) is threadedly connected to a bottle cap (13) fixedly connected to the lower end of the depth control part (3). A protection part (2) for buffering the impact force of the sampling part (1) when entering the water is sleeved outside the sampling bottle (11). The protection part (2) includes positioning rings (21) arranged up and down, and the positioning rings (21) are elastically connected by a telescopic spring (25) arranged in the middle. A floating plate (23) is slidably connected to the outside of the positioning rings (21); Wherein, a suction part (26) for controlling the position of the floating plate (23) on the outer surface of the positioning ring (21) is arranged on the surface of the positioning ring (21); Wherein, grooves are provided on the outer sides of the upper and lower positioning rings (21), and a plurality of fixing grooves (211) are evenly arranged on the inner sides of the grooves. A fixing rod (22) is slidably connected to the inner wall of the fixing grooves (211); The protection part (2) further includes a second wedge block (27) fixedly connected to the distal end of the fixing rod (22) close to the center of the positioning ring (21), and the other side of the second wedge block (27) is elastically connected to an elastic member (28); Wherein, the suction part (26) of the upper positioning ring (21) is located at the bottom end, the suction part (26) of the lower positioning ring (21) is located at the top end, the suction parts (26) of the upper and lower positioning rings (21) are symmetrically arranged, and the suction parts (26) enter each other's magnetic field space when the compression dimension of the telescopic spring (25) is the smallest.

2. The mobile low-disturbance river water quality precise sampler according to claim 1, wherein: The upper positioning ring (21) is fixedly connected to the upper part of the circumferential outer surface of the sampling bottle (11), and one end of the fixing rod (22) far from the center of the positioning ring (21) is fixedly connected to a floating plate (23).

3. A mobile low-disturbance precise water quality sampler for river channels according to claim 2, characterized in that: The second wedge block (27) and the elastic member (28) are both located in a movable groove arranged on the inner wall of the positioning ring (21), and the upper surface of the second wedge block (27) is attached to the suction part (26).

4. The mobile low-disturbance river water quality precise sampler according to claim 3, wherein: The suction part (26) includes a first wedge block (264) attached to the upper surface of the second wedge block (27), a positioning rod (263) is fixedly connected to the top end of the first wedge block (264), a compression spring (262) is sleeved outside the positioning rod (263), and a magnetic member (261) is fixedly connected to the top end of the compression spring (262). In the initial state, the lower surface of the magnetic member (261) is flush with the upper surface of the positioning ring (21).

5. The mobile low-disturbance river water quality precise sampler according to claim 1, characterized in that: The bottom end of the sampling bottle (11) is fixedly connected to a sampling head (12), and a buffer member (14) is arranged at the position of the bottom end of the inner cavity of the sampling bottle (11) above the sampling head (12). Buffer grooves (141) are provided on the inner wall of the buffer member (14), and side notch openings (142) are provided on the sides of the buffer grooves (141).

6. The mobile low-disturbance river water quality precise sampler according to claim 1, characterized in that: In the initial state, the lower surface of the lower positioning ring (21) is higher than the bottom end of the sampling head (12).

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