Underground water stratified sampling device for environmental protection

Abstract

The invention relates to the technical field of underground water sampling devices, and discloses an underground water stratified sampling device for environmental protection, the underground water stratified sampling device is connected to a Beller pipe, two ends of the Beller pipe are open, the stratified sampling device comprises a plurality of water storage tanks, a piston body and a plurality of plugging assemblies, the plurality of water storage tanks are connected to the outer wall of the Beller pipe, and the piston body is connected to the outer wall of the Beller pipe; the water storage tanks are evenly distributed along the center line of the Beller pipe, first water inlets are formed in the upper portions of the sides, close to the Beller pipe, of the water storage tanks, a control rod is fixedly connected to the upper end of the piston body, the multiple plugging assemblies are connected to the upper portions of the buoyancy plates correspondingly, each plugging assembly comprises a plugging block and an elastic piece connected to the plugging block, and the elastic pieces are connected to the buoyancy plates. When the water level in the water storage tank rises, the elastic piece upwards close to the first water inlet applies abutting force to the blocking block so that the blocking block can block the first water inlet. The underground water stratified sampling device can realize stratified sampling of underground water without frequent pulling and releasing, and does not cause large disturbance to the underground water.

Description

Technical Field

[0001] The invention relates to the technical field of groundwater sampling devices, and in particular to a groundwater stratified sampling device for environmental protection. Background Art

[0002] Groundwater stratified sampling devices are generally used in land development and engineering construction, and are usually used in conjunction with depth testers. Groundwater pollution is also developing in an increasingly serious trend, so a sound mechanism must be established to control the discharge of pollutants and ensure the quality of groundwater. Similarly, sampling and analysis are required to obtain corresponding results to provide original data reference for protection work.

[0003] Taking original groundwater samples is the premise for determining the accuracy of the pollution degree. Compared with other samplers, the sampling device of the Beyler tube has the advantages of simple structure, convenient sampling, and minimal damage to the original ecological water body. Therefore, the sampling method of groundwater is mainly completed by using the Beyler tube. The Beyler tube is a hollow and slender tube with an open top. Its interior is divided into two parts by a valve, one is the water inlet part and the other is the sampling part. In order to ensure the accuracy of water sample collection, the Beyler tube is also equipped with a depth detector. When sampling, it is usually pulled by a traction rope or a rod. The upper end of the Bailer tube is pulled, and the Bailer tube is slowly and vertically sunk into the groundwater source well. When the Bailer tube is immersed in the groundwater, the groundwater will automatically enter the sampling part due to the pressure difference inside and outside the sampling part. At this time, by controlling the valve of the water inlet part, while keeping the sampling part sealed, the valve of the water inlet part is opened to allow the groundwater sample to enter the sampling part. Once the sampling part is filled, the valve of the water inlet part is closed, and the Bailer tube is taken out of the well or groundwater. After taking out the groundwater sample, the sample in the Bailer tube is transferred to a sampling bottle or other container for analysis.

[0004] However, the existing Bailer tube sampling device can only sample groundwater once. When sampling groundwater at different depths in layers, frequent lifting and lowering operations are required, which is not only troublesome but also inefficient. The frequent lifting and lowering of the Bailer tube will undoubtedly cause frequent disturbances to the groundwater. If the movement is too large, it will affect the concentration distribution of microbial components in groundwater at different depths, thereby resulting in inaccurate data collected from different water layers, resulting in a large amount of manpower and material resources. Summary of the invention

[0005] The invention provides a groundwater stratified sampling device for environmental protection, which can realize stratified sampling of groundwater without frequent pulling and releasing, and will not cause great disturbance to the groundwater.

[0006] The invention provides a groundwater stratified sampling device for environmental protection, which is connected to a Bailer tube, both ends of which are open. The stratified sampling device comprises: a plurality of water storage tanks, a piston body, and a plurality of plugging assemblies. The plurality of water storage tanks are connected to the outer wall of the Bailer tube, and each water storage tank is evenly distributed along the center line of the Bailer tube. A first water inlet is provided at the upper part of the water storage tank close to one side of the Bailer tube, and a second water inlet communicated with the Bailer tube is provided at a position of the Bailer tube corresponding to each first water inlet. A buoyancy plate is horizontally arranged in the water storage tank, and a piston body is movably connected in the Bailer tube, and the piston body is sealed with the inner wall of the Bailer tube. The thickness of the piston body is greater than the diameter of the second water inlet. A control rod is fixedly connected to the upper end of the piston body, and a plurality of plugging assemblies are respectively connected to the upper part of each buoyancy plate. The plugging assemblies comprise a blocking block and an elastic member connected to the blocking block, and the elastic member is connected to the buoyancy plate. When the water level in the water storage tank rises, the elastic member close to the first water inlet upwardly applies abutting force to the blocking block so that the blocking block blocks the first water inlet.

[0007] Preferably, the water tank is an annular box body, the middle part of the water tank is sleeved on the bailer tube and the two are fixedly connected, the buoyancy plate is arranged in an annular shape, the buoyancy plate is sleeved on the inner ring wall of the water tank and the gap between the inner ring walls of the two is matched, and a guide member is provided on the buoyancy plate to limit the deflection of the buoyancy plate during the floating process.

[0008] Preferably, there are multiple first water inlets on the water storage tank, and the buoyancy plate is also connected to the same number of elastic members and blocking blocks corresponding to the positions of the first water inlets.

[0009] Preferably, the portion of the first water inlet located in the water tank is a semi-arc-shaped concave cavity, and the blocking surface of the blocking block is a spherical surface matching the shape of the concave cavity.

[0010] Preferably, the elastic member includes: a slide rail, a slider, and a first spring. The bottom of the slide rail is fixedly connected to the buoyancy plate and is close to the Bayle tube. The slider is slidably connected to the slide rail. The slider slides along one circumferential direction of the Bayle tube. One end of the slider close to the Bayle tube is hinged with a connecting rod, and the other end of the connecting rod is hinged with an inclined rotating plate. The blocking block is fixedly connected to a side plate surface of the rotating plate close to the Bayle tube. The spherical surface of the blocking block fits with the inner wall of the inner ring of the water tank. The bottom of the rotating plate is hinged to the buoyancy plate. The first spring is placed in the slide rail. One end of the first spring is fixedly connected to the inner wall of the slide rail, and the other end is fixedly connected to the slider.

[0011] Preferably, the buoyancy board includes an annular board body and a plurality of hollow air bags connected to the bottom of the board body, and a plurality of groups of buoyancy balls are connected to the upper surface of the buoyancy board, and the buoyancy balls are fixedly connected to the board body through ropes.

[0012] Preferably, a sleeve is inserted into the lower opening of the Baylor tube, an annular groove is vertically opened at the upper end of the sleeve, a second spring is connected in the annular groove, the lower end of the second spring is fixedly connected to the sleeve, and the upper end of the second spring is fixedly connected to the lower surface of the piston body.

[0013] Preferably, the traction tube includes a plurality of sleeves that can be threadedly connected end to end, the lower end of the bottom traction tube is fixedly connected to the upper end of the Bayle tube through a flange, and the control rod is also a plurality of sleeves that can be threadedly connected end to end, and the lower end of the control rod at the bottom is fixedly connected to the upper end of the piston body.

[0014] Preferably, a sealing layer made of rubber material is provided on the outer surface of the block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: a plurality of water storage tanks are provided, the interior of which is hollow, so as to serve as a tool for storing water samples, wherein the water storage tanks are connected to the Bailer tube, and the Bailer tube can be conveniently lowered through the traction body on the Bailer tube, so that the Bailer tube and each water storage tank can both probe into water layers of different depths. Since there are multiple water storage tanks, the effect of sampling water samples from different water layers can be achieved. Specifically, a first water inlet is provided at the upper part of one side of each water storage tank, and a second water inlet is provided on the Bailer tube, so that the water sample that first enters the Bailer tube through the lower opening of the Bailer tube can be collected through the second water inlet and the first water inlet. The water inlet is directly poured into the water tank at the bottom, and the piston body arranged therein has the effect of blocking the second water inlet and controlling the water storage state in the Bailer tube, wherein the piston body adjusts the height position in the Bailer tube through the action of external force, and the piston body can be lifted or pressed down by mechanical control, or can be manually controlled by the staff. The multiple water tanks arranged in the device are distributed vertically, so each water tank will also be filled with water samples from bottom to top in sequence. The device can achieve the effect of blocking the first water inlet of the water tank when the sample water in the water tank is filled to a position close to its first water inlet by means of the buoyancy plate arranged in the device and in cooperation with the sealing component.

[0016] Compared with the existing Bailer tube sampling method, the present invention can achieve the effect of isolating, classifying and quickly sampling multiple layers of groundwater without using multiple frequent pulling and releasing actions. It can utilize the relative pressure difference between groundwater and an empty water tank to allow water samples to be naturally poured into it. During the sampling process, it will not cause excessive disturbance to groundwater at different depths, will not destroy and affect the original concentration of groundwater, and will ensure that the sampled water samples can represent the water quality of the layer as much as possible, thereby ensuring that the subsequent detection and collection of data on the water samples is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the internal structure of a groundwater stratified sampling device for environmental protection from a horizontal perspective provided by an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A partial enlarged view of part A;

[0019] Figure 3A schematic structural diagram of a groundwater stratified sampling device for environmental protection provided by an embodiment of the present invention, in which the bottom water storage tank is filled with water samples;

[0020] Figure 4 for Figure 3 A partial enlarged view of part B;

[0021] Figure 5 A schematic diagram of the internal structure of a water storage tank in a groundwater stratified sampling device for environmental protection provided by an embodiment of the present invention from a top view;

[0022] Figure 6 A schematic diagram of the structure from a top view of a water storage tank in a groundwater stratified sampling device for environmental protection provided in an embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 1. Bayle tube; 11. Second water inlet; 2. Traction tube; 3. Counterweight; 4. Water tank; 41. First water inlet; 5. Piston body; 6. Control rod; 7. Buoyancy plate; 71. Guide member; 72. Buoyancy ball; 8. Blocking assembly; 81. Block; 82. Elastic member; 821. Slide rail; 822. Sliding block; 8221. Bumper plate; 823. Connecting rod; 824. Rotating plate; 825. First spring; 9. Sleeve; 91. Annular groove; 92. Second spring; 10. Anti-slip assembly; 101. Fixed seat; 102. Sliding plate; 103. Rack; 104. Gear; 105. Third spring; 106. First hook member; 107. Second hook member; 108. Vertical rod. DETAILED DESCRIPTION

[0025] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0026] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] refer to Figure 1 , Figure 2 and Figure 5The present invention provides a groundwater stratified sampling device for environmental protection, which is connected to a Bailer tube 1, and both ends of the Bailer tube 1 are open. Specifically, the Bailer tube 1 is arranged vertically, and the upper end of the Bailer tube 1 is connected to a traction tube 2 and the lower end of the Bailer tube 1 is connected to a counterweight body 3. The stratified sampling device comprises: a plurality of water storage tanks 4, a piston body 5, and a plurality of plugging components 8. The plurality of water storage tanks 4 are all connected to the outer wall of the Bailer tube 1, and each water storage tank 4 is evenly distributed along the center line of the Bailer tube 1. A first water inlet 41 is provided at the upper part of the water storage tank 4 close to one side of the Bailer tube 1, and a second water inlet 11 communicating with the first water inlet 41 is provided at the position of the Bailer tube 1 corresponding to each first water inlet 41, and a buoyancy plate 7 is horizontally arranged in the water storage tank 4. The plug body 5 is movably connected in the Baylor tube 1, the piston body 5 is sealed with the inner wall of the Baylor tube 1, the thickness of the piston body 5 is larger than the diameter of the second water inlet 11, and a control rod 6 is fixedly connected to the upper end of the piston body 5. The piston body 5 can move along the axial direction of the Baylor tube 1 when the vertical tension and compression of the control rod 6 is controlled by an external force. The control rod 6 coincides with the axis of the traction tube 2 and the gap between the two is matched. A plurality of blocking components 8 are respectively connected to the upper part of each buoyancy plate 7, and the blocking component 8 includes a blocking block 81 and an elastic member 82 connected to the blocking block 81. The elastic member 82 is connected to the buoyancy plate 7. When the water level in the water tank 4 rises, the elastic member 82 that is close to the first water inlet 41 upwardly applies abutting force to the blocking block 81 so that the blocking block 81 blocks the first water inlet 41.

[0028] In the above embodiments, a plurality of water storage tanks 4 are provided, the interior of which is hollow, so as to serve as a tool for storing water samples, wherein the water storage tanks 4 are connected to the bailer tube 1, and the bailer tube 1 is connected to the traction tube 2 having a traction lowering or lifting function, and by lowering the traction tube 2, the bailer tube 1 and each water storage tank 4 can both probe into water layers of different depths. Since there are a plurality of water storage tanks 4, the effect of sampling water samples from different water layers can be achieved. Specifically, a first water inlet 4 is provided at the upper part of one side of each water storage tank 4. 1, and the second water inlet 11 opened on the bailer tube 1, can realize that the water sample that first enters the bailer tube 1 through the lower opening of the bailer tube 1 can be directly poured into the water storage tank 4 at the bottom through the second water inlet 11 and the first water inlet 41, wherein the piston body 5 provided therein has the effect of blocking the second water inlet 11 and controlling the water storage state in the bailer tube 1, wherein the piston body 5 is adjusted to a height position in the bailer tube 1 through a control rod 6, the upper end of the control rod 6 extends out of the groundwater shaft, and can be mechanically adjusted. The lifting or pressing action can also be controlled manually by the staff. This embodiment does not limit the specific driving method. The multiple water tanks 4 provided in the device are distributed vertically, so each water tank 4 will also store water samples in sequence from bottom to top. The device can achieve the effect of sealing the first water inlet 41 of the water tank 4 when the sample water in the water tank 4 is filled to a position close to its first water inlet 41 through the buoyancy plate 7 provided and the sealing component 8. Compared with the existing Bailer tube sampling method, the present invention can achieve the effect of isolating, classifying and quickly sampling multiple layers of groundwater without multiple frequent pulling and releasing actions. It can use the relative pressure difference between groundwater and empty water tank 4 to allow water samples to be naturally poured into it. During the sampling process, it will not cause excessive disturbance to groundwater at different depths, will not destroy and affect the original concentration of groundwater, and ensures that the sampled water sample can represent the water quality of the layer as much as possible, thereby ensuring that the subsequent detection and collection of the water sample data is more accurate.

[0029] Further, refer to Figure 3 , Figure 5 and Figure 6 The water tank 4 is an annular box body, the middle part of the water tank 4 is sleeved on the bailer tube 1 and the two are fixedly connected, the buoyancy plate 7 is annularly arranged, the buoyancy plate 7 is sleeved on the inner ring wall of the water tank 4 and the gap between the inner ring walls of the two is matched, and a guide member 71 is provided on the buoyancy plate 7 to limit the deflection of the buoyancy plate 7 during the floating process.

[0030] In the above embodiments, by limiting the water tank 4 and the buoyancy plate 7 to be annular, the water tank 4 can surround the bailer tube 1, the force is more uniform, and the storage space is larger. At the same time, the buoyancy plate 7 is set in the middle part of the water tank 4, which can limit the buoyancy plate 7. After the water sample enters, the liquid level rises, and the buoyancy plate 7 will not float around, but float upward at the same position. At the same time, the guide member 71 is specifically a limit block, and a groove body is vertically opened at the position of the limit block of the water tank 4. When the buoyancy plate 7 floats, it will not deflect, ensuring that the relative positions of the blocking block 81 and the elastic member 82 and the water tank 4 remain unchanged.

[0031] Further, refer to Figure 1 and Figure 4 There are multiple first water inlets 41 on the water storage tank 4, and the buoyancy plate 7 is also connected with the same number of elastic members 82 and blocking blocks 81 corresponding to the positions of the first water inlets 41.

[0032] In the above embodiments, the speed of injecting water samples can be increased, thereby improving the efficiency of sampling.

[0033] Further, refer to Figure 2 and Figure 4 The portion of the first water inlet 41 located in the water storage tank 4 is a semi-arc-shaped concave cavity, and the blocking surface of the blocking block 81 is a spherical surface matching the shape of the concave cavity.

[0034] In the above embodiments, by limiting the relative shapes and fit of the blocking block 81 and the first water inlet 41 , the principle of the ball valve can be used to improve the blocking effect.

[0035] Further, refer to Figure 2 The elastic member 82 includes: a slide rail 821, a slider 822, and a first spring 825. The bottom of the slide rail 821 is fixedly connected to the buoyancy plate 7 and is close to the Baylor tube 1. The slider 822 is slidably connected to the slide rail 821. The slider 822 slides along one circumferential direction of the Baylor tube 1. The end of the slider 822 close to the Baylor tube 1 is hinged with a connecting rod 823, and the other end of the connecting rod 823 is hinged with an inclined rotating plate 824. The blocking block 81 is fixedly connected to a side plate surface of the rotating plate 824 close to the Baylor tube 1. The spherical surface of the blocking block 81 fits the inner wall of the inner ring of the water tank 4. The bottom of the rotating plate 824 is hinged to the buoyancy plate 7. The first spring 825 is placed in the slide rail 821. One end of the first spring 825 is fixedly connected to the inner wall of the slide rail 821, and the other end is fixedly connected to the slider 822.

[0036] In the above embodiments, specifically, the first spring 825 always gives the slider 822 a force toward the center line of the Bayle tube 1, and through the connecting rod 823 and the rotating plate 824, the blocking block 81 will always give an abutting force to the inner wall of the inner ring of the water tank 4. When the water level rises and is about to reach the first water inlet 41, the blocking block 81 will be instantly placed in the concave cavity of the first water inlet 41 due to the force of the first spring 825, thereby achieving blocking. At this time, the second water inlet 11 corresponding to it is no longer filled with sample water.

[0037] Further, refer to Figure 4 The buoyancy board 7 includes a ring-shaped board body and a plurality of hollow air bags connected to the bottom of the board body. The upper surface of the buoyancy board 7 is connected to a plurality of groups of buoyancy balls 72, and the buoyancy balls 72 are fixedly connected to the board body through a rope body.

[0038] In the above embodiments, the buoyancy ball 72 can further enhance the buoyancy of the buoyancy plate 7 after it bears the weight of the elastic member 82 and the blocking block 81 .

[0039] Further, refer to Figure 2 A sleeve 9 is inserted into the lower end opening of the Baylor tube 1, and an annular groove 91 is vertically opened at the upper end of the sleeve 9. A second spring 92 is connected to the annular groove 91. The lower end of the second spring 92 is fixedly connected to the sleeve 9, and the upper end of the second spring 92 is fixedly connected to the lower surface of the piston body 5.

[0040] In the above embodiments, the piston body 5 can be limited by the second spring 92 and the sleeve 9. When the control rod 6 is not pulled, the piston body 5 will be reset under the action of the second spring 92. Specifically, the lower end of the piston body 5 is fixedly connected to the inner diameter of the sleeve 9 corresponding to the inner diameter of the sleeve 9, and is used to force out excess water samples. When the second spring 92 is in an initial unexpanded state, the block will be flush with the lower opening of the bailer tube 1, thereby avoiding different levels of water samples from remaining in the bailer tube 1.

[0041] Further, refer to Figure 1 Considering the length requirement, the traction tube 2 includes multiple sleeves that can be threadedly connected at the head and tail. The lower end of the bottom traction tube 2 is fixedly connected to the upper end of the Baylor tube 1 through a flange. The control rod 6 is also a plurality of sleeves that can be threadedly connected at the head and tail. The lower end of the control rod 6 located at the bottom is fixedly connected to the upper end of the piston body 5.

[0042] The above embodiments are easy to disassemble as much as possible, and can be applied to underground water shafts of any depth by continuously adding or reducing casings and installing casings.

[0043] Furthermore, a sealing layer made of rubber is provided on the outer surface of the blocking block 81 .

[0044] In the above embodiments, the sealing layer is provided to further enhance the sealing effect of the arc surface of the block 81 on the first water inlet 41. Meanwhile, the rubber material is provided to enable the contact portion of the block 81 to deform under the pressure of the first spring 825, thereby enhancing the sealing effect.

[0045] Further, refer to Figure 3 , this embodiment takes into account that when the piston body 5 is squeezed downward, if the force is large, it may cause the block 81 to float. Although the probability is small, it is still possible to affect the sealing performance. Therefore, this embodiment also provides a secondary limiting effect after the block 81 is blocked. Therefore, in this embodiment, the upper wall in the water tank 4 is located above each slide rail 821 and is connected with an anti-slip assembly 10. The anti-slip assembly 10 is used to prevent the block 81 blocking the first water inlet 41 from deviating or falling off and affecting the blocking effect. The anti-slip assembly 10 includes: a fixed seat 101, two sliding plates 102, and two racks 101 with opposite tooth surfaces. 03 and a gear 104 placed between the two racks 103 and meshing with the two racks 103, a spacing is left between the two sliding plates 102, and the two racks 103 are respectively fixedly connected to the sides of the two sliding plates 102 that are close to each other, and the two sliding plates 102 are both connected to the fixed seat 101 along the vertical sliding, and the gear 104 rotates with the middle part of the fixed seat 101 through the wheel axle, and its axis extends horizontally, and the upper end of the sliding plate 102 closer to the side of the bailer tube 1 is fixedly connected with a third spring 105, and the lower end of the sliding plate 102 is connected with a first hook member 106, and a second hook member 107 is arranged below the middle part of the fixed seat 101, and the second hook The component 107 is connected to the first hook component 106, and the middle part of the second hook component 107 is hinged with a vertical rod 108, the upper end of the vertical rod 108 is fixedly connected to the lower part of the fixing seat 101, and the upper end of the slider 822 close to the side of the baile tube 1 is extended upward with a bumper 8221. When the buoyancy plate 7 floats upward with the rising water level, until the block 81 blocks the first water inlet 41, the first spring 825 will be prompted to recover the elastic force from the compressed state, so that the slider 822 moves along the slide rail 821 toward the side of the baile tube 1. At this time, the bumper 8221 at the upper end of the slider 822 will contact the lower part of the hinge point of the second hook component 107 and drive the second hook component 107 to move. 107 rotates counterclockwise, thereby disengaging from the first hook member 106. Under the restoring elastic force of the third spring 105, the sliding plate 102 connected to the first hook member 106 moves upward, and with the meshing transmission of the gear 104, the other sliding plate 102 extends and slides downward in the fixed seat 101, so as to be accurately located on the side of the collision plate 8221 away from the bayonet 1, thereby playing a limiting role. After the blocking block 81 is subjected to a large inward thrust, the sliding plate 102 can limit the collision plate 8221 and the slider 822 under the elastic force of the first spring 825, and can press the slider 822 to prevent it from moving inward.

[0046] The head shapes of the first hook and the second hook are similar to those of a James-type coupler. It is only necessary to manually stretch the first hook to re-hook it with the head of the second hook. This structural shape will only separate under the action of external force. Therefore, when the collision plate 8221 approaches the Baylor tube 1 horizontally along with the slider 822, it will collide with the bottom of the hinge point of the first hook, so that the first hook acts like a seesaw, and its head rotates, thereby achieving uncoupling. The second hook drives the corresponding sliding plate 102 to slide upward under the pulling force of the third spring 105.

[0047] Preferably, the present embodiment takes into account the need to facilitate the removal of sample water from the water tank 4, and therefore a plurality of water intake valves may be provided on each water tank 4, wherein the water intake valves are provided below the side walls of the water tank 4, so as to facilitate the removal of sample water. Meanwhile, in consideration of the integrity of the application, each water tank 4 is provided with a depth detector in the same manner as in the prior art, and the specific arrangement is not specifically limited in the present embodiment.

[0048] Preferably, the upper end plate of the water tank 4 is two semi-circular end covers that can be opened and closed and are sealed. They can be opened and closed to facilitate manual cleaning of the interior after taking water and maintenance of internal components. At the same time, the first hook and the second hook can be readjusted. Since the head shapes of the first hook and the second hook are similar to those of a James-type coupler, it is only necessary to manually lengthen the first hook and re-hook it with the head of the second hook.

[0049] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A groundwater stratified sampling device for environmental protection, connected to a bailer tube (1), characterized in that: Both ends of the Baylor tube (1) are open, and the stratified sampling device comprises: A plurality of water storage tanks (4) are connected to the outer wall of the bailer tube (1), and each of the water storage tanks (4) is evenly distributed along the center line of the bailer tube (1). A first water inlet (41) is provided at the upper portion of the water storage tank (4) close to the bailer tube (1). A second water inlet (11) communicating with the first water inlet (41) is provided at a position of the bailer tube (1) corresponding to each first water inlet (41), and a buoyancy plate (7) is horizontally arranged in the water storage tank (4); A piston body (5) is movably connected to the inside of the baile tube (1), the piston body (5) is sealed to the inner wall of the baile tube (1), and the thickness of the piston body (5) is greater than the diameter of the second water inlet (11); A plurality of blocking components (8) are respectively connected to the upper part of each buoyancy plate (7), the blocking components (8) comprising a blocking block (81) and an elastic member (82) connected to the blocking block (81), the elastic member (82) being connected to the buoyancy plate (7), and when the water level in the water storage tank (4) rises, the elastic member (82) which is close to the first water inlet (41) upwardly applies abutting force to the blocking block (81) so that the blocking block (81) blocks the first water inlet (41).

2. A groundwater stratified sampling device for environmental protection as claimed in claim 1, characterized in that: The water storage tank (4) is an annular box body, the middle part of the water storage tank (4) is sleeved on the bailer tube (1) and the two are fixedly connected, the buoyancy plate (7) is arranged in an annular shape, the buoyancy plate (7) is sleeved on the inner ring wall of the water storage tank (4) and the inner ring walls of the two are clearance-matched, and the buoyancy plate (7) is provided with a guide member (71) to limit the deflection of the buoyancy plate (7) during the floating process.

3. A groundwater stratified sampling device for environmental protection as claimed in claim 2, characterized in that: The portion of the first water inlet (41) located inside the water storage tank (4) is in the form of a semi-arc-shaped concave cavity, and the blocking surface of the blocking block (81) is in the form of a spherical surface matching the shape of the concave cavity.

4. A groundwater stratified sampling device for environmental protection as claimed in claim 3, characterized in that: There are a plurality of first water inlets (41) on the water storage tank (4), and the buoyancy plate (7) is also connected with the same number of elastic members (82) and blocking blocks (81) at positions corresponding to the first water inlets (41).

5. A groundwater stratified sampling device for environmental protection as claimed in claim 4, characterized in that: The elastic member (82) comprises: A slide rail (821), the bottom of which is fixedly connected to the buoyancy plate (7) and is close to the bailey tube (1); A slider (822) is slidably connected in the slide rail (821), and the slider (822) slides along one circumferential direction of the Baylor tube (1). One end of the slider (822) close to the Baylor tube (1) is hinged with a connecting rod (823), and the other end of the connecting rod (823) is hinged with an inclined rotating plate (824). The blocking block (81) is fixedly connected to a side plate surface of the rotating plate (824) close to the Baylor tube (1), and the spherical surface of the blocking block (81) is in contact with the inner wall of the inner ring of the water storage tank (4), and the bottom of the rotating plate (824) is hinged with the buoyancy plate (7); A first spring (825) is disposed in the slide rail (821); one end of the first spring (825) is fixedly connected to the inner wall of the slide rail (821), and the other end of the first spring (825) is fixedly connected to the slider (822).

6. A groundwater stratified sampling device for environmental protection as claimed in claim 2, characterized in that: The buoyancy board (7) comprises an annular board body and a plurality of hollow air bags connected to the bottom of the board body. The upper surface of the buoyancy board (7) is connected to a plurality of groups of buoyancy balls (72), and the buoyancy balls (72) are fixedly connected to the board body via ropes.

7. A groundwater stratified sampling device for environmental protection as claimed in claim 1, characterized in that: The outer surface of the blocking block (81) is provided with a sealing layer made of rubber material.

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