A device for on-site pressure pumping of water samples

Abstract

The application relates to the technical field of sampling devices, and discloses a field pressure-extraction water sampling device, which comprises a sampling cylinder, a connecting rod is slidably connected in the sampling cylinder, a piston is fixedly connected to the bottom of the connecting rod, a first check valve is fixedly connected to the bottom of the outer wall of the sampling cylinder, a second check valve is fixedly connected to the upper portion of the outer wall of the sampling cylinder, a filtering assembly is arranged at the bottom of the inner wall of the sampling cylinder, a lubricating assembly is arranged at the top of the outer wall of the sampling cylinder, the filtering assembly comprises a sealing ring, the sealing ring is arranged in the sampling cylinder, glass fibers, quartz sand, activated carbon and a filter screen are fixedly connected to the inner wall of the sealing ring in sequence from top to bottom, and a cleaning assembly is arranged at the bottom of the filter screen. Through the filtering assembly and the cleaning assembly, the pollutants in the water sample can be removed, and in the water sampling process, the water flow impacts the impeller to drive the rotating shaft to rotate, so that the cleaning roller is automatically cleaned on the gear and the tooth ring.

Description

Technical Field

[0001] This invention relates to the field of sampling device technology, specifically to a device for on-site pressure sampling of water. Background Technology

[0002] In the field of geological exploration, accurately understanding the distribution, reserves, and quality of groundwater resources plays a crucial role in the exploration and assessment of mineral resources. Water samples obtained after well drilling provide direct evidence for analyzing the mineral composition, pH level, and content of harmful elements in groundwater, thereby helping to determine whether the area has exploitable value and potential environmental impacts.

[0003] Traditional water sampling devices often have several shortcomings. Firstly, in terms of water filtration, most employ only simple filter structures, lacking effective comprehensive filtration methods for tiny particulate impurities, colloids, odor substances, organic matter, and heavy metal ions. This results in insufficient purity of the collected water samples, failing to meet the requirements of high-precision testing and severely impacting the reliability of subsequent analytical results, potentially misleading relevant decision-making. Secondly, impurities easily accumulate on the filter screens during long-term use. Due to the lack of an automatic cleaning mechanism, frequent manual cleaning is not only time-consuming and labor-intensive but can also damage the filter screens during the cleaning process, further reducing the device's efficiency and stability, and increasing overall operating costs and maintenance difficulty. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an on-site pressure-based water sampling device, which solves the problem of the lack of effective comprehensive filtration methods.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a field pressure sampling device for water sampling, comprising a sampling cylinder, a connecting rod slidably connected inside the sampling cylinder, a piston fixedly connected to the bottom of the connecting rod, a first check valve fixedly connected to the bottom of the outer wall of the sampling cylinder, a second check valve fixedly connected to the upper part of the outer wall of the sampling cylinder, a filter assembly provided at the bottom of the inner wall of the sampling cylinder, and a lubrication assembly provided at the top of the outer wall of the sampling cylinder; The filter assembly includes a sealing ring installed inside the sampling cylinder. The inner wall of the sealing ring is fixedly connected from top to bottom with glass fiber, quartz sand, activated carbon and filter screen. A cleaning component is provided at the bottom of the filter screen.

[0006] Preferably, the cleaning component includes a fixing frame, which is fixedly connected to the bottom of the inner wall of the sampling cylinder. A rotating shaft is rotatably connected to the middle of the fixing frame. An impeller is fixedly connected to one side of the rotating shaft, and two cleaning rollers are rotatably connected to the other side of the rotating shaft. A drive component is provided inside the cleaning rollers.

[0007] Preferably, the drive assembly includes a gear and a gear ring, the gear being fixedly connected to the outer wall of the cleaning roller, and the gear ring being fixedly connected to the bottom of the sealing ring.

[0008] Preferably, the lubrication assembly includes a cylinder and a housing, both of which are fixedly connected to the outer wall of the sampling cylinder. An installation plate is fixedly connected inside the housing, a slide rod is fixedly connected to the top of the installation plate, a sliding plate is slidably connected to the outer wall of the slide rod, a spring is sleeved on the outer wall of the slide rod, and two one-way valves are fixedly connected to the top of the housing.

[0009] Preferably, the output end of the second check valve is fixedly connected to a connector, and a drain pipe is sleeved inside the connector. A water sample bottle is fixedly connected to the end of the drain pipe away from the connector.

[0010] Preferably, the gear and the gear ring mesh, and the cleaning roller and the filter screen are bonded together.

[0011] Preferably, a pipe is provided between one of the one-way valves and the cylinder, and a pipe is provided between the other one-way valve and the outer wall of the connecting rod.

[0012] Preferably, one end of the spring is fixedly connected to the top of the slide plate, and the other end of the spring is fixedly connected to the inner wall of the box.

[0013] Preferably, the outer wall of the sliding plate is slidably connected to the inside of the housing and abuts against the inner wall of the housing.

[0014] Preferably, the top of the outer wall of the sampling cylinder has two vent holes, and an vent pipe is installed on the bottom vent hole. The end of the vent pipe away from the vent hole is fixedly connected to the inside of the box.

[0015] This invention provides a device for on-site pressure-based water sampling. It has the following advantages: 1. By setting up a filtration component and a cleaning component, this invention can remove pollutants from water samples. During the water sample extraction process, the water flow impacts the impeller, causing the rotating shaft to rotate. This allows the cleaning roller to automatically clean the filter screen under the meshing drive of gears and gear rings, preventing impurities from accumulating and maintaining the filter screen's good filtration performance at all times.

[0016] 2. By combining a lubrication assembly and an exhaust pipe, the present invention utilizes the exhaust air to push the slide plate inside the housing, and through the cooperation of a one-way valve and a pipe, lubricant is delivered to the contact area between the connecting rod and the sampling cylinder, effectively reducing friction between components. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a cross-sectional view of the sampling cylinder of the present invention; Figure 3 This is a schematic diagram of the filter screen of the present invention; Figure 4 For this Figure 3 Enlarged view of point A in the middle; Figure 5 This is a cross-sectional view of the sealing ring of the present invention; Figure 6 for Figure 1 Enlarged view at point C; Figure 7 for Figure 1 Enlarged view at point B in the middle; Figure 8 This is a cross-sectional view of the housing of the present invention.

[0018] The components are as follows: 1. Sampling cylinder; 2. Connecting rod; 3. Piston; 4. First check valve; 5. Sealing ring; 6. Glass fiber; 7. Quartz sand; 8. Activated carbon; 9. Filter screen; 10. Gear ring; 11. Fixing frame; 12. Rotating shaft; 13. Impeller; 14. Cleaning roller; 15. Gear; 16. Second check valve; 17. Connector; 18. Drain pipe; 19. Water sample bottle; 20. Vent hole; 21. Vent pipe; 22. Cylinder body; 23. Box body; 24. Mounting plate; 25. Slide rod; 26. Slide plate; 27. Spring; 28. One-way valve; 29. ​​Pipeline. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example: Please see the appendix Figure 1 - Appendix Figure 3This invention provides an on-site pressure-based water sampling device, including a sampling cylinder 1. The sampling cylinder 1 serves as the main container for water sample collection and is the core component of the entire device. A connecting rod 2 is slidably connected inside the sampling cylinder 1. The connecting rod 2 is connected to the rotating rod of a drilling machine, and the drilling rod drives the connecting rod 2 to slide. A piston 3 is fixedly connected to the bottom of the connecting rod 2, and the connecting rod 2 is slidably connected to the inside of the sampling cylinder 1, allowing the piston 3 to move up and down inside the sampling cylinder 1. When the piston 3 moves upward, a negative pressure is formed inside the sampling cylinder 1, thereby drawing water samples into the sampling cylinder 1. Inside, water samples are extracted. A first check valve 4 is fixedly connected to the bottom of the outer wall of the sampling cylinder 1. The first check valve 4 is installed at the bottom of the outer wall of the sampling cylinder 1. Its function is to prevent the extracted water sample from flowing back to the water source, ensuring that the collected water sample can be effectively retained in the sampling cylinder 1, and ensuring the accuracy and integrity of the sampling. A second check valve 16 is fixedly connected to the upper part of the outer wall of the sampling cylinder 1. The second check valve 16 is located at the upper part of the outer wall of the sampling cylinder 1. It can control the direction of the water sample flowing out of the sampling cylinder 1, preventing external impurities from flowing back into the sampling cylinder 1 and affecting the quality of the water sample. A filter assembly is installed at the bottom of the inner wall of the sampling cylinder 1. The filter assembly can perform preliminary filtration of the absorbed water sample, removing large particulate impurities and suspended solids, improving the purity of the water sample, so as to facilitate more accurate detection and analysis of the water sample in the future. A lubrication assembly is installed at the top of the outer wall of the sampling cylinder 1. The lubrication assembly can reduce the friction between the connecting rod 2 and the sampling cylinder 1, extend the service life of the device, and ensure the smooth sliding of the connecting rod 2, improving the convenience and efficiency of the sampling operation. Please see the appendix Figure 3 - Appendix Figure 5 The filter assembly includes a sealing ring 5, which is installed inside the sampling cylinder 1. The sealing ring 5 seals and secures the filter material, preventing water sample leakage from the gap between the filter assembly and the inner wall of the sampling cylinder 1, ensuring the water sample is fully filtered. From top to bottom, the inner wall of the sealing ring 5 is fixedly connected with glass fiber 6, quartz sand 7, activated carbon 8, and a filter screen 9. Glass fiber 6 has high filtration precision, capable of intercepting tiny particulate impurities in the water sample, further improving its clarity. Quartz sand 7 can filter out some larger particles and some colloidal substances, performing preliminary coarse filtration of the water sample. Activated carbon 8 has strong adsorption capacity, capable of adsorbing odors, organic matter, and some heavy metal ions and other harmful substances in the water sample, effectively improving the water sample quality and making it more suitable for testing. Filter 9 can block potentially larger particles of impurities, preventing them from entering the subsequent sampling process and protecting other components inside the device. A cleaning component is installed at the bottom of filter 9, which can automatically clean filter 9 during water sample extraction to prevent impurities from accumulating on filter 9 and affecting the filtration effect. This ensures that the filtration component is always in good working condition and continuously provides efficient filtration for water sample collection.

[0021] Please see the appendix Figure 2 - Appendix Figure 4 The cleaning assembly includes a mounting frame 11, which is fixedly connected to the bottom of the inner wall of the sampling cylinder 1. The mounting frame 11 provides stable support and a base for the rotating shaft 12, ensuring the stability and reliability of the entire cleaning assembly during water sample extraction. The rotating shaft 12 is rotatably connected to the middle of the mounting frame 11. An impeller 13 is fixedly connected to one side of the rotating shaft 12, and two cleaning rollers 14 are rotatably connected to the other side of the rotating shaft 12. When a water sample is drawn into the sampling cylinder 1, the water flow impacts the impeller 13, causing the impeller 13 to drive the rotating shaft 12 to rotate. The two cleaning rollers 14 connected to the other side of the rotating shaft 12 rotate with the rotation of the rotating shaft 12, wiping and cleaning the surface of the filter screen 9 to remove impurities adhering to the filter screen 9. The cleaning roller 14 is equipped with a drive component, which provides power for the rotation of the cleaning roller 14, ensuring that it can continuously and effectively clean the filter screen 9, thereby maintaining the good filtration performance of the filter screen 9, ensuring the long-term stable operation of the entire filtration assembly, and improving the quality and efficiency of water sample collection.

[0022] Please see the appendix Figure 4 The drive assembly includes a gear 15 and a gear ring 10. The gear 15 is fixedly connected to the outer wall of the cleaning roller 14, and the gear ring 10 is fixedly connected to the bottom of the sealing ring 5. When the rotating shaft 12 drives the cleaning roller 14 to rotate, the gear 15 will rotate together with the cleaning roller 14. Since the gear 15 and the gear ring 10 mesh with each other and the gear ring 10 is fixed, the gear 15 will roll on the gear ring 10, thereby providing additional driving force for the cleaning roller 14, enabling the cleaning roller 14 to rotate more stably and efficiently, and enhancing the cleaning effect on the filter screen 9.

[0023] Please see the appendix Figure 6 and attached Figure 8The lubrication assembly includes a cylinder 22 and a housing 23, both of which are fixedly connected to the outer wall of the sampling cylinder 1. The cylinder 22 serves as a storage container for the lubricating fluid and is fixed to the outer wall of the sampling cylinder 1 to facilitate a continuous source of lubricating fluid for the lubrication system. The housing 23 is also installed on the outer wall of the sampling cylinder 1, and its internal mounting plate 24 supports and fixes the sliding rod 25, ensuring the stability of the sliding rod 25 within the housing 23. The mounting plate 24 is fixedly connected inside the housing 23, and the sliding rod 25 is fixedly connected to the top of the mounting plate 24. A sliding plate 26 is slidably connected to the outer wall of the sliding rod 25. When pressure fluctuations generated by the movement of the connecting rod 2 are transmitted to the lubrication system, the sliding plate 26 slides on the sliding rod 25, thereby adjusting the distribution and flow of the lubricating fluid within the housing 23. A spring 27 is sleeved on the outer wall of the slide rod 25. The spring 27 is sleeved on the outer wall of the slide rod 25 and can provide a restoring force after the slide plate 26 moves, so as to ensure that the slide plate 26 returns to the initial position after the pressure returns to normal, and maintain the stable state of the lubrication system. Two one-way valves 28 are fixedly connected to the top of the housing 23. The two one-way valves 28 on the top of the housing 23 control the direction of the lubricant in and out, prevent the lubricant from flowing back, and ensure that the lubricant can circulate between the lubrication components and the connecting rod 2 and other parts that need lubrication according to the predetermined path.

[0024] Please refer to the appendix. Figure 2 and attached Figure 7 The output end of the second check valve 16 is fixedly connected to a connector 17. A drain pipe 18 is sleeved inside the connector 17. The end of the drain pipe 18 away from the connector 17 is fixedly connected to a water sample bottle 19. The connector 17 provides a stable connection interface for the drain pipe 18, ensuring that the water sample can flow smoothly from the sampling cylinder 1 through the drain pipe 18 into the water sample bottle 19. By operating the piston 3 and other components, the water sample is made to pass through the second check valve 16, the connector 17 and the drain pipe 18 under pressure, and finally flow into the water sample bottle 19 for collection and preservation.

[0025] Please see the appendix Figure 4 The meshing between gear 15 and gear ring 10 ensures that the cleaning roller 14 receives a stable and continuous driving force during rotation, guaranteeing its uniformity and stability. This meshing transmission method accurately transmits power, ensuring that the cleaning roller 14 rotates along a predetermined trajectory and speed, effectively cleaning the filter screen 9. The close contact between the cleaning roller 14 and the filter screen 9 allows for full contact with impurities on the surface of the filter screen 9. Through friction and rolling, impurities are removed from the filter screen 9, improving the cleaning effect, preventing impurities from accumulating on the filter screen 9, maintaining its good filtration performance, and thus ensuring the normal operation of the entire water sampling device and the quality of water sample collection.

[0026] Please see the appendix Figure 6 and attached Figure 8One check valve 28 is connected to the cylinder 22 via a pipe 29, and the other check valve 28 is connected to the outer wall of the connecting rod 2 via a pipe 29. The two check valves 28 are connected to the cylinder 22 and the outer wall of the connecting rod 2 respectively through the pipes 29, forming a lubricating fluid circulation system. When the connecting rod 2 moves up and down inside the sampling cylinder 1, it causes pressure changes in the pipe 29 connected to it. One check valve 28, under pressure, draws lubricating fluid from the cylinder 22 into the pipe 29 and delivers it to the contact area between the connecting rod 2 and the sampling cylinder 1 for lubrication. The other check valve 28 prevents backflow of lubricating fluid, ensuring a continuous supply of lubricating fluid to the parts requiring lubrication, reducing friction between the connecting rod 2 and the sampling cylinder 1, reducing component wear, extending the service life of the device, improving the reliability and stability of the device, and ensuring smooth sampling operations.

[0027] Please see the appendix Figure 8 One end of the spring 27 is fixedly connected to the top of the slide plate 26, and the other end of the spring 27 is fixedly connected to the inner wall of the housing 23. The elastic force of the spring 27 can also provide power for the reset of the slide plate 26, ensuring that the components in the lubrication system can operate in the normal working position and state, ensuring a stable supply of lubricating fluid and the durability of the lubrication effect, thereby maintaining the good performance of the entire water sampling device.

[0028] Please see the appendix Figure 8 The outer wall of the slide plate 26 is slidably connected to the inside of the housing 23 and abuts against the inner wall of the housing 23. This design allows the slide plate 26 to slide stably up and down within the housing 23 while ensuring the airtightness of the housing 23. When the pressure in the lubrication system changes, the slide plate 26 moves within the housing 23 according to the pressure difference, thereby regulating the flow and distribution of the lubricating fluid.

[0029] Please see the appendix Figure 6 The sampling cylinder 1 has two vent holes 20 on its top outer wall, and a vent pipe 21 is installed on the bottom vent hole 20. The end of the vent pipe 21 away from the vent hole 20 is fixedly connected to the inside of the housing 23. During the water sample extraction process, the air inside the sampling cylinder 1 needs to be expelled to ensure that the piston 3 can move up and down smoothly to extract the water sample. The top vent hole 20 can directly expel some air, while the bottom vent hole 20 introduces another part of the air into the housing 23 through the vent pipe 21, thereby pushing the sliding plate 26 inside the housing 23 to slide.

[0030] Working principle: When water samples need to be collected, firstly, connecting rod 2 is installed on the drill rod of the drilling machine, and the drill rod is controlled to slide upward. At this time, piston 3 rises together with connecting rod 2, creating a negative pressure inside sampling cylinder 1. Due to the one-way conduction of the first check valve 4, water from the external water source enters the sampling cylinder 1 through the filter assembly under the action of pressure difference.

[0031] When water enters the sampling cylinder 1, it first passes through the sealing ring 5 and its internal filter layer. It then passes through glass fiber 6, quartz sand 7, activated carbon 8, and filter screen 9 in sequence. Tiny particulate impurities in the water are intercepted by glass fiber 6, larger particles and some colloidal substances are filtered by quartz sand 7, odors, organic matter, and some heavy metal ions and other harmful substances are adsorbed by activated carbon 8, and the remaining larger particulate impurities are blocked by filter screen 9.

[0032] As the water sample enters the sampling cylinder 1, the water flow impacts the impeller 13, causing the impeller 13 to drive the rotating shaft 12 to rotate. Since the cleaning roller 14 on the other side of the rotating shaft 12 obtains a stable driving force through the meshing of the gear 15 and the gear ring 10, the cleaning roller 14 will rotate together with the rotating shaft 12, and the cleaning roller 14 will be in close contact with the filter screen 9, removing the impurity particles attached to the filter screen 9 through friction and rolling.

[0033] After the water sample collection is completed, when downward pressure is applied to the connecting rod 2, the water sample in the sampling cylinder 1 is squeezed. Due to the one-way conduction of the second check valve 16, the water sample can only enter the connector 17 through the second check valve 16, and then flow into the water sample bottle 19 through the drain pipe 18, thus completing the collection and preservation of the water sample.

[0034] When the connecting rod 2 moves, it will discharge the gas inside the sampling cylinder 1 and deliver it to the inside of the box 23 through the exhaust pipe. The slide plate 26 inside the box 23 will slide on the slide rod 25 according to the pressure change. One of the one-way valves 28 draws the lubricating fluid in the cylinder 22 into the pipe 29 under pressure and delivers it to the contact part between the connecting rod 2 and the sampling cylinder 1.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A field pressure sampling device for water, comprising a sampling cylinder (1), characterized in that, The sampling cylinder (1) is slidably connected to a connecting rod (2), and a piston (3) is fixedly connected to the bottom of the connecting rod (2). A first check valve (4) is fixedly connected to the bottom of the outer wall of the sampling cylinder (1), and a second check valve (16) is fixedly connected to the upper part of the outer wall of the sampling cylinder (1). A filter assembly is provided at the bottom of the inner wall of the sampling cylinder (1), and a lubrication assembly is provided at the top of the outer wall of the sampling cylinder (1). The filter assembly includes a sealing ring (5), which is installed inside the sampling cylinder (1). The inner wall of the sealing ring (5) is fixedly connected from top to bottom with glass fiber (6), quartz sand (7), activated carbon (8) and filter screen (9). A cleaning component is provided at the bottom of the filter screen (9).

2. The on-site pressure-assisted water sampling device according to claim 1, characterized in that, The cleaning assembly includes a fixed frame (11), which is fixedly connected to the bottom of the inner wall of the sampling cylinder (1). A rotating shaft (12) is rotatably connected to the middle of the fixed frame (11). An impeller (13) is fixedly connected to one side of the rotating shaft (12), and two cleaning rollers (14) are rotatably connected to the other side of the rotating shaft (12). A drive assembly is provided inside the cleaning rollers (14).

3. The on-site pressure-assisted water sampling device according to claim 2, characterized in that, The drive assembly includes a gear (15) and a toothed ring (10). The gear (15) is fixedly connected to the outer wall of the cleaning roller (14), and the toothed ring (10) is fixedly connected to the bottom of the sealing ring (5).

4. The on-site pressure-assisted water sampling device according to claim 1, characterized in that, The lubrication assembly includes a cylinder (22) and a box (23). The cylinder (22) and the box (23) are both fixedly connected to the outer wall of the sampling cylinder (1). An installation plate (24) is fixedly connected inside the box (23). A slide rod (25) is fixedly connected to the top of the installation plate (24). A sliding plate (26) is slidably connected to the outer wall of the slide rod (25). A spring (27) is sleeved on the outer wall of the slide rod (25). Two one-way valves (28) are fixedly connected to the top of the box (23).

5. The on-site pressure-assisted water sampling device according to claim 1, characterized in that, The output end of the second check valve (16) is fixedly connected to a connector (17), and a drain pipe (18) is sleeved inside the connector (17). A water sample bottle (19) is fixedly connected to one end of the drain pipe (18) away from the connector (17).

6. The on-site pressure-assisted water sampling device according to claim 3, characterized in that, The gear (15) meshes with the gear ring (10), and the cleaning roller (14) adheres to the filter screen (9).

7. The on-site pressure-assisted water sampling device according to claim 4, characterized in that, A pipe (29) is provided between one of the check valves (28) and the cylinder (22), and a pipe (29) is provided between the other check valve (28) and the outer wall of the connecting rod (2).

8. The on-site pressure-assisted water sampling device according to claim 4, characterized in that, One end of the spring (27) is fixedly connected to the top of the slide plate (26), and the other end of the spring (27) is fixedly connected to the inner wall of the box (23).

9. A field pressure-based water sampling device according to claim 4, characterized in that, The outer wall of the slide plate (26) is slidably connected to the inside of the box (23) and abuts against the inner wall of the box (23).

10. A field pumping and water sampling device according to claim 4, characterized in that, The sampling tube (1) has two exhaust holes (20) on the top of its outer wall, and an exhaust pipe (21) is installed on the exhaust hole (20) at the bottom. The end of the exhaust pipe (21) away from the exhaust hole (20) is fixedly connected to the inside of the box (23).

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