A deep groundwater layered sampling device capable of multiple sealing

Abstract

The utility model relates to layered sampling device technical field especially relates to a deep groundwater layered sampling device of multiple times packer, including sampler, the sampler has several and the first and last end of adjacent two sampler axial connection, the sampler top installation has drive terminal in the top, the sampler bottom is connected with the end cover in the bottom, the sampler includes sampling cylinder, the sampling cylinder bottom integral connection has packer. The utility model discloses through setting up multiple sampler head tail successive connection, form the series connection structure, and the hard connection is formed through the abutment between the drive rod and piston between multiple samplers, thereby through the drive of driver push drive rod synchronous transmission driving force to multiple samplers, make the piston in the sampler of different depth simultaneous movement and open the corresponding water inlet, thereby realize the synchronous sampling in different water layer, prevent the mutual interference between the sample in different water layer.

Description

Technical Field

[0001] This utility model relates to the technical field of stratified sampling devices, and in particular to a deep groundwater stratified sampling device that can be sealed multiple times. Background Technology

[0002] Deep groundwater sampling devices are commonly used sampling equipment in hydrogeological surveys and groundwater environmental monitoring. They can penetrate deep into groundwater layers to obtain water samples, which are of great significance for analyzing changes in groundwater quality and identifying the migration paths of pollutants.

[0003] Existing groundwater stratification sampling devices struggle to achieve simultaneous sampling of groundwater at multiple depths, often requiring multiple descents of the device for sampling, which is cumbersome and inefficient. Secondly, the sealing effect on the samples after sampling is poor, causing water samples collected at different depths to easily mix with shallow water during the device's ascent, resulting in sample contamination and affecting the final test results. Furthermore, the sealing structures of existing devices are mostly disposable sealing mechanisms, which cannot be reused multiple times, thus failing to meet the needs of long-term dynamic sampling. Utility Model Content

[0004] The purpose of this invention is to provide a deep groundwater stratification sampling device that can be sealed multiple times, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A deep groundwater stratification sampling device capable of multiple isolations includes a sampler, wherein the sampler has several samplers connected axially at their ends. A drive terminal is installed on the top of the sampler located at the top end, and an end cap is connected to the bottom of the sampler located at the bottom end. The sampler includes a sampling cylinder, and a sealing cylinder is integrally connected to the bottom of the sampling cylinder. The sampling cylinder has a collection chamber, and the sealing cylinder has a limiting chamber communicating with the collection chamber. A piston is slidably connected in the limiting chamber. Several inlets communicating with the limiting chamber are provided on the side wall of the sealing cylinder. A sealing assembly is slidably connected in the collection chamber. One bottom end of the sealing assembly passes through the limiting chamber and is fixedly connected to the piston. The drive terminal is drivenly connected to the sealing assembly, and one bottom end of the piston abuts against a sealing assembly disposed inside an adjacent sampler.

[0006] Preferably, the sampling tube has a first connecting groove at its axial top end, the sealing tube has a second connecting ring at its axial bottom end, the second connecting ring has a second sealing ring at its root, and two adjacent samplers are connected to each other through the corresponding first connecting groove and the first connecting ring.

[0007] Preferably, the driving terminal includes a mounting plate, the bottom of the mounting plate is provided with a first connecting ring, the outer circumference root of the first connecting ring is provided with a first sealing ring, the first connecting ring is correspondingly connected to the first connecting groove of the adjacent sampling cylinder, the top of the mounting plate is fixedly installed with a driver, and the output end of the driver passes through the mounting plate and is driven to connect with the sealing component in the adjacent sampling cylinder.

[0008] Preferably, the sidewall of the mounting plate is provided with a plurality of connectors at equal intervals, and a first lifting ring is hinged to the connector.

[0009] Preferably, the sealing assembly includes a drive rod coaxially disposed in the collection cavity, a slider is fixedly installed in the middle section of the drive rod, the slider is slidably connected to the side wall of the collection cavity, and an elastic element is provided between the slider and the collection cavity. The top end of the drive rod passes through the first connecting groove, and the bottom end of the drive rod passes through the sealing cylinder and is fixedly connected to the piston.

[0010] Preferably, a plurality of third sealing rings are installed on the outer periphery of the slider sidewall.

[0011] Preferably, the bottom wall of the packer cylinder is provided with a through-hole, and the drive rod inside the sampling cylinder passes through the through-hole and abuts against the bottom wall of the piston in the packer cylinder connected to its top.

[0012] Preferably, a limiting ring is provided between the second connecting ring and the water inlet, and a filter screen is provided around the outside of the water inlet on the outer periphery of the sealing cylinder.

[0013] Preferably, the top of the end cap is provided with a second connecting groove corresponding to the second connecting ring, and the end of the end cap opposite to the connecting groove is hinged to a second lifting ring via a connector. Preferably, the sampling cylinder is provided with a plurality of guide fins along its outer periphery in an axial direction, and a rotating shaft is provided at one end of the guide fins near the sampling cylinder, the rotating shaft being rotatably connected to the sampling cylinder through a connector.

[0014] Compared with the prior art, this utility model provides a deep groundwater stratification sampling device that can be sealed multiple times, which has the following beneficial effects: 1. This utility model sets up multiple samplers connected in sequence to form a series structure. The multiple samplers are rigidly connected by the drive rod and the piston. The drive rod is driven by the driver to synchronously transmit driving force to the multiple samplers, so that the pistons in the samplers at different depths move at the same time to open the corresponding water inlets. This enables synchronous sampling in different water layers and prevents the samples in different water layers from interfering with each other. 2. This utility model sets a slider on the drive rod and sets an elastic element between the slider and the collection cavity to drive the slider to drive the drive rod and piston to reset. Thus, at the end of sampling, the compressed elastic element pushes the drive rod through the slider to drive the piston to reset and move upward in the limiting cavity to close the water inlet. This avoids mutual interference between samples from different water layers when the whole sampling device is extracted from the groundwater layer.

[0015] 3. This utility model uses a mechanical transmission and reset structure to enable the inlet channel to be opened and closed repeatedly at high frequency without external interference, thus meeting the needs of long-term dynamic sampling. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the combined state of this utility model; Figure 2 This is a three-dimensional structural diagram of a single sampler of this utility model; Figure 3 This is a partially exploded cross-sectional view of the connection structure between the sampler and the drive terminal of this utility model. Figure 4 This is a partial cross-sectional view of the structure of two interconnected samplers of this utility model; Figure 5 This is a partially enlarged schematic diagram of the filter installation structure in the sampler of this utility model; Figure 6 This is a three-dimensional structural diagram of the sealing component of this utility model; Figure 7 This is a three-dimensional structural diagram of the drive terminal of this utility model; Figure 8 This is a three-dimensional structural diagram of the end cap of this utility model.

[0017] In the diagram: 1. Drive terminal; 101. Driver; 102. Mounting plate; 103. First lifting ring; 104. First connecting ring; 105. First sealing ring; 2. Sampler; 201. Sampling tube; 2011. First connecting groove; 2012. Collection chamber; 202. Packer tube; 2021. Limiting chamber; 2022. Inlet; 2023. Connecting hole; 203. Limiting ring; 204. Second connecting ring; 205. Second sealing ring; 3. End cap; 301. Second connecting groove; 302. Second lifting ring; 4. Packer assembly; 401. Drive rod; 402. Slider; 4021. Third sealing ring; 403. Piston; 5. Guide fin; 501. Rotating shaft; 6. Filter screen; 7. Elastic element. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Example, refer to Figure 1 - Figure 8 A deep groundwater stratification sampling device capable of multiple sealing includes a sampler 2, which has several samplers connected axially at their ends to connect multiple samplers 2 for sampling from groundwater levels at different depths. A drive terminal 1 is installed on the top of the sampler 2 at the top, and an end cap 3 is connected to the bottom of the sampler 2 at the bottom. The sampler 2 includes a sampling cylinder 201, with a sealing cylinder 202 integrally connected to the bottom of the sampling cylinder 201. The sampling cylinder 201 has a collection chamber 2012 for storing the collected samples. The sealing cylinder 202 has a limiting cavity 2021 communicating with the collection chamber 2012. A piston 403 is slidably connected to the limiting cavity 2021. Several inlets 2022 communicating with the limiting cavity 2021 are provided on the side wall of the sealing cylinder 202. The outer peripheral side wall of the piston 403 is tightly fitted with the side wall of the limiting cavity 2021. The sampler can slide within the limiting cavity 2021 to close or open the inlet 2022, allowing the air in the sampler 2 to be compressed by the groundwater under pressure and enter the collection cavity 2012 through the inlet 2022. A sealing component 4 is slidably connected in the collection cavity 2012. One end of the sealing component 4 is fixedly connected to the piston 403. The drive terminal 1 is driven by the sealing component 4. During collection, the drive terminal 1 controls the movement of the sealing component 4 in the collection cavity 2012, thereby driving the piston 403 to move. One end of the piston 403 is abutted against the sealing component 4 set inside the adjacent sampler 2 for synchronous transmission, so that multiple samplers 2 can simultaneously perform sampling operations in groundwater layers at different depths. After sampling, the sealing component 4 is reset, driving the piston 403 to slide along the limiting cavity 2021 to close the inlet 2022, thereby preventing samples from different water layers from interfering with each other.

[0021] Furthermore, the sampling tube 201 has a first connecting groove 2011 at its axial top end, and a second connecting ring 204 is provided at the axial bottom end of the outer periphery of the sealing tube 202. A second sealing ring 205 is provided at the root of the second connecting ring 204. Two adjacent samplers 2 are connected to the first connecting ring 104 through the corresponding first connecting groove 2011. A first sealing ring 105 is provided at the connection between the first connecting groove 2011 and the first connecting ring 104. The first sealing ring 105 can effectively prevent water sample leakage at the connection point after connection, ensuring the sealing of the sampling process.

[0022] When in use, the outer circumference of the second connecting ring 204 is designed with external threads, and the inner ring of the first connecting groove 2011 is provided with internal threads that mesh with the external threads, which facilitates quick installation or disassembly and enhances the stability of the connection. This allows multiple samplers 2 to form a tight series connection in the vertical direction, ensuring the stability and reliability of the overall device when sampling at different depths.

[0023] Furthermore, the driving terminal 1 includes a mounting plate 102, the bottom of the mounting plate 102 is provided with a first connecting ring 104, the outer periphery root of the first connecting ring 104 is provided with a first sealing ring 105, and the first connecting ring 104 is correspondingly connected to the first connecting groove 2011 of the adjacent sampling cylinder 201.

[0024] In use, the first connecting ring 104 has an external thread corresponding to the internal thread of the first connecting groove 2011. The first sealing ring 105 is used to improve the sealing effect between the first connecting ring 104 and the first connecting groove 2011, and to prevent water sample leakage at the connection point. The top of the mounting plate 102 is fixedly mounted with a driver 101, which is a driving cylinder of model CDQEB20-50. The output end of the driver 101 passes through the mounting plate 102 and is driven to connect with the sealing component 4 in the adjacent sampling tube 201, thereby pushing the sealing component 4 to slide in the collection chamber 2012, and thus controlling the opening and closing of the inlet 2022.

[0025] The top of the mounting plate 102 is also equipped with a control module for receiving external commands and adjusting the working status of the driver 101.

[0026] Furthermore, the sidewall of the mounting plate 102 is provided with several connectors at equal intervals, and the connectors are hinged with first lifting rings 103, so that the lifting equipment can easily control the lifting or lowering of the entire sampling device by connecting the first lifting rings 103, thereby going deep into the water body for sampling. The several first lifting rings 103 are arranged around the mounting plate 102, so that the mounting plate 102 is subjected to uniform force during hoisting, thereby enabling the entire sampling device to go deep into the groundwater layer for sampling in a vertical direction perpendicular to the horizontal plane.

[0027] Furthermore, the sealing assembly 4 includes a drive rod 401 coaxially disposed in the collection chamber 2012. A slider 402 is fixedly installed in the middle section of the drive rod 401. During sampling, the driver 101 pushes the drive rod 401 to slide downward in the collection chamber 2012, causing the drive rod 401 to push the piston 403 to slide down in the limiting chamber 2021, opening the inlet 2022. Under pressure, groundwater enters the limiting chamber 2021 through the inlet 2022. Since the limiting chamber 2021 is connected to the collection chamber 2012, groundwater ultimately enters the collection chamber 2012. The slider 402 is slidably connected to the side wall of the collection chamber 2012, and a space is provided between the slider 402 and the collection chamber 2012. An elastic element 7 is provided, which is used to push the slider 402 to reset after sampling, so that the drive rod 401 drives the piston 403 to slide and close the inlet 2022 in the limiting cavity 2021, so that the sampled water sample is sealed in the chamber between the bottom wall of the collection chamber 2012 and the bottom of the slider 402. The top end of the drive rod 401 passes through the first connecting groove 2011 and abuts against the piston 403 inside the sampler 2 connected to its top. The bottom end of the drive rod 401 passes through the sealing cylinder 202 and is fixedly connected to the piston 403, thereby realizing synchronous sampling by multiple samplers 2 and sealing the inlet 2022 after sampling to avoid interference between water samples from different water layers.

[0028] By setting a drive rod 401 driven by the driver 101, and a slider 402 on the drive rod 401, and an elastic element 7 between the slider 402 and the sampling cavity 2012, the inlet 2022 can be cyclically opened and closed during the sampling process through the linear drive of the driver 101 and the reset of the elastic element 7, so as to realize high-frequency sampling at different water layers.

[0029] Furthermore, several third sealing rings 4021 are installed on the outer periphery of the side wall of the slider 402 to form a sealing structure between the outer periphery of the side wall of the slider 402 and the collection cavity 2012, thereby preventing the sample water after collection from overflowing from the gap between the slider 402 and the collection cavity 2012.

[0030] Furthermore, a through-hole 2023 is provided on the bottom wall of the sealing cylinder 202. The drive rod 401 inside the sampling cylinder 201 passes through the through-hole 2023 and abuts against the bottom wall of the piston 403 in the sealing cylinder 202 connected to its top. This is used to ensure that when multiple samplers 2 are connected, the sealing component 4 of any sampler 2 has a hard contact with the piston 403 of the adjacent sampler 2, thereby achieving synchronous movement for sampling under the driving action of the driver 101. After sampling, the driving force of the driver 101 is removed, and the elastic element 7 pushes the slider 402 to move, driving the piston 403 to close the water inlet 2022, thereby isolating the collected sample water from the external environment and preventing the water from being polluted.

[0031] Furthermore, a limiting ring 203 is provided between the second connecting ring 204 and the inlet 2022. A filter screen 6 is provided around the outside of the inlet 2022 on the outer periphery of the sealing cylinder 202. The limiting ring 203 is used to limit the insertion depth of the second connecting ring 204 when it is connected to the first connecting groove 2011 and the second connecting groove 301, so as to avoid blocking the inlet 2022. The filter screen 6 is used to filter large particulate impurities in the water during sampling, preventing them from entering the sampling device and causing blockage inside the sampler 2, and ensuring the purity of the collected sample. The filter screen 6 is installed on the outer periphery of the sealing cylinder 202 in a sleeve manner, which is convenient for disassembly and replacement.

[0032] Furthermore, the top of the end cap 3 is provided with a second connecting groove 301 corresponding to the second connecting ring 204. The end of the end cap 3 opposite to the connecting groove is hinged with a second lifting ring 302 through a connector. The second lifting ring 302 is used to lift the assembly weight, so that the whole sampling device can sink into the groundwater layer more quickly during sampling.

[0033] Furthermore, the sampling tube 201 is provided with several guide fins 5 along its outer periphery along the axial direction. The end of the guide fin 5 near the sampling tube 201 is provided with a rotating shaft 501. The rotating shaft 501 is rotatably connected to the sampling tube 201 through a connector. The guide fins 5 can effectively reduce the water flow resistance of the sampling tube 201 during the sinking process and have the function of stabilizing the sinking trajectory of the sampling tube 201. At the same time, the guide fins 5 are rotatably connected to the sampling tube 201 through the rotating shaft 501, so that the guide fins 5 can automatically adjust the angle according to the water flow direction, avoiding the sampling tube 201 from being deflected or radially rotated due to water flow disturbance, which helps to ensure the smooth progress of the sampling work.

[0034] Working principle: Before sampling, the number of samplers 2 is determined according to the target water layer depth. Multiple samplers 2 are sequentially threaded together with the second connecting ring 204 via the first connecting groove 2011 to form a vertical series structure. The top sampler 2 is equipped with a drive terminal 1, and the bottom sampler 2 is connected to an end cap 3 with a lifting ring for suspending counterweights. The entire device is hoisted by a lifting device and slowly lowered vertically into the target water layer until the entire device reaches the predetermined depth to start sampling. The driver 101 is then activated, and the output end of the driver 101 pushes the sampler connected to it. The drive rod 401 in sampler 2 moves downward. Since the drive rod 401 in each sampler 2 abuts against the piston 403 of the adjacent sampler 2, the pistons 403 of all samplers 2 are pushed simultaneously and slide down synchronously in the limiting cavity 2021. This opens the water inlet 2022 on the side wall of the sealing cylinder 202 of the corresponding sampler 2. Under pressure, the external groundwater is filtered by the filter screen 6 and enters the limiting cavity 2021 through the water inlet 2022 and further flows into the collection cavity 2012, where it is stored in the chamber between the bottom wall of the collection cavity 2012 and the slider 402.

[0035] After sampling is completed, the actuator 101 releases its thrust. At this time, the downward compressive force of the elastic element 7 in the sampling chamber caused by the slider 402 disappears, thereby pushing the slider 402 to slide upward along the collection chamber 2012, which in turn drives the drive rod 401 and piston 403 to reset. This causes the piston 403 to slide in the limiting chamber 2021 and seal the inlet 2022, thus sealing the water samples collected by each sampler 2 inside their respective collection chambers 2012, effectively preventing the mixing and contamination of samples from different water layers. The entire device is then lifted smoothly to the ground using a lifting device, and each sampler 2 is disassembled in turn. The groundwater samples sealed in their respective collection chambers 2012 are then taken out, completing the sampling operation.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A deep groundwater stratification sampling device capable of multiple sealing, comprising a sampler (2), characterized in that: The sampler (2) has several samplers connected axially at their ends. The top sampler (2) at the top is equipped with a drive terminal (1), and the bottom sampler (2) at the bottom is connected with an end cap (3). The sampler (2) includes a sampling tube (201), and a sealing tube (202) is integrally connected to the bottom of the sampling tube (201). The sampling tube (201) has a collection chamber (2012), and the sealing tube (202) has a limiting chamber (2) that communicates with the collection chamber (2012). 021), a piston (403) is slidably connected in the limiting cavity (2021), and several water inlets (2022) communicating with the limiting cavity (2021) are provided on the side wall of the sealing cylinder (202). A sealing assembly (4) is slidably connected in the collection cavity (2012). One bottom end of the sealing assembly (4) is fixedly connected to the piston (403). The driving terminal (1) is driven connected to the sealing assembly (4). One bottom end of the piston (403) is abutted and connected to the sealing assembly (4) set inside the adjacent sampler (2).

2. The deep groundwater stratification sampling device capable of multiple sealing as described in claim 1, characterized in that, The sampling tube (201) has a first connecting groove (2011) at its axial top end, and the sealing tube (202) has a second connecting ring (204) at its axial bottom end on its outer periphery. The second connecting ring (204) has a second sealing ring (205) at its root. The two adjacent samplers (2) are connected to the first connecting ring (104) through the opposite first connecting groove (2011).

3. The deep groundwater stratification sampling device capable of multiple sealing as described in claim 2, characterized in that, The driving terminal (1) includes a mounting plate (102). The bottom of the mounting plate (102) is provided with a first connecting ring (104). The outer root of the first connecting ring (104) is provided with a first sealing ring (105). The first connecting ring (104) is correspondingly connected to the first connecting groove (2011) of the adjacent sampling tube (201). The top of the mounting plate (102) is fixedly installed with a driver (101). The output end of the driver (101) passes through the mounting plate (102) and is driven to connect with the sealing component (4) in the adjacent sampling tube (201).

4. The deep groundwater stratification sampling device capable of multiple sealing as described in claim 3, characterized in that, The mounting plate (102) has several connectors at equal intervals on its side wall, and a first lifting ring (103) is hinged to the connector.

5. A deep groundwater stratification sampling device capable of multiple sealing as described in claim 3, characterized in that, The sealing assembly (4) includes a drive rod (401) coaxially disposed in the collection chamber (2012). A slider (402) is fixedly installed in the middle section of the drive rod (401). The slider (402) is slidably connected to the side wall of the collection chamber (2012). An elastic element (7) is provided between the slider (402) and the collection chamber (2012). The top end of the drive rod (401) passes through the first connecting groove (2011), and the bottom end of the drive rod (401) passes through the sealing cylinder (202) and is fixedly connected to the piston (403).

6. A deep groundwater stratification sampling device capable of multiple sealing as described in claim 5, characterized in that, Several third sealing rings (4021) are installed on the outer periphery of the side wall of the slider (402).

7. A deep groundwater stratification sampling device capable of multiple sealing as described in claim 5, characterized in that, The bottom wall of the packer (202) is provided with a through-hole (2023). The drive rod (401) inside the sampling tube (201) passes through the through-hole (2023) and abuts against the bottom wall of the piston (403) in the packer (202) connected to its top.

8. A deep groundwater stratification sampling device capable of multiple sealing as described in claim 2, characterized in that, A limiting ring (203) is provided between the second connecting ring (204) and the water inlet (2022), and a filter screen (6) is provided around the outside of the water inlet (2022) of the sealing cylinder (202).

9. A deep groundwater stratification sampling device capable of multiple sealing as described in claim 2, characterized in that, The top end of the end cap (3) is provided with a second connecting groove (301) corresponding to the second connecting ring (204), and the end of the end cap (3) facing away from the connecting groove is hinged with a second lifting ring (302) through a connector.

10. A deep groundwater stratification sampling device capable of multiple sealing as described in claim 1, characterized in that, The sampling tube (201) is provided with a number of guide fins (5) along its outer periphery in an axial direction. The guide fins (5) are provided with a rotating shaft (501) at one end near the sampling tube (201). The rotating shaft (501) is rotatably connected to the sampling tube (201) through a connector.

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