Depth-keeping water taking device for drilling underground water sampling
The fixed-depth water-intake device addresses inefficiencies and contamination in groundwater sampling by enabling precise alignment and sealing at designated depths, ensuring clean water samples.
Patent Information
- Application Number
- CN202421173810.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-27
AI Technical Summary
Existing groundwater sampling devices face inefficiencies and contamination issues during water extraction from boreholes due to misalignment of components, leading to incomplete sealing and water mixing with external environments.
A fixed-depth water-intake device comprising a water-intake pipe, hammer cover, hammer bottom, steel shaft, and sealing rings, allowing sequential alignment and sealing at designated depths for accurate sampling.
Ensures accurate and efficient groundwater sampling by preventing contamination during extraction and lifting, with improved sealing and alignment mechanisms.
Smart Images
Figure CN222253943U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of engineering survey drilling hydrogeology, and in particular relates to a fixed-depth water-taking device used for drilling groundwater sampling. Background Art
[0002] Water sampling in a borehole is usually carried out in conjunction with a pumping test, and the sampling is done when the pumping is about to end. If the water sample is not collected from a pumping borehole, the specification requires that twice the volume of the water column in the hole be extracted and the water sample in the hole be collected after the water level is restored. At present, drilling tools are often used to extract water after the hole is completed on site, which requires drilling in and out, and the process is cumbersome and inefficient. The utility model patent with application number 201721487770.9 discloses a "fixed-depth water extraction device", including a water extraction pipe, an upper plug, a lower plug and a rope, which can achieve fixed-depth water extraction. However, since the rope will shake with the flow of water in the water, it is difficult to align with the lower plug during the lowering of the water extraction pipe, and similarly it is difficult to align with the upper plug, resulting in a situation where it cannot be sealed. During the lifting process, water from the upper position flows into the water extraction pipe from the unsealed position, causing contamination to the sampled water. Utility Model Content
[0003] In order to solve the above problems, the utility model proposes a fixed-depth water extraction device which can quickly extract groundwater in a borehole and can also accurately determine the depth to extract water samples.
[0004] A fixed-depth water-intake device for sampling groundwater in a borehole, characterized in that it includes a water-intake pipe, a hammer cover, a hammer bottom and a steel shaft, the interior of the water-intake pipe is hollow to form a water-intake cavity, the top and bottom of the water-intake pipe are respectively arranged as slope ports matching the hammer cover and the hammer bottom, and water-intake pipe sealing rings are arranged on the ports, the steel shaft is hollow and a conical seal is arranged on the top, a steel wire rope is connected to the seal, the bottom of the steel shaft is connected to a drain valve, and a water inlet hole is opened in the middle and lower parts; the steel shaft penetrates the positioning pin, the hammer bottom, the water-intake pipe and the hammer cover in sequence from bottom to top, and the positioning pin is fixedly connected to the steel shaft, a steel shaft sealing ring is arranged at the intersection of the steel shaft and the top and bottom of the hammer bottom, and a steel shaft sealing ring is arranged at the intersection of the steel shaft and the top of the hammer cover.
[0005] Furthermore, a scale is set on the steel wire rope.
[0006] The beneficial effects of the utility model are: the hammer cover, the water intake pipe, and the hammer bottom are separated and lowered in sequence during the lowering process, so that water can be taken before reaching the designated hole depth position, and water can be taken and sealed after reaching the designated hole depth position. During the lifting process, the hammer cover and the hammer bottom are sealed with the steel shaft through the steel shaft sealing ring, and the water intake pipe is sealed with the hammer cover and the hammer bottom through the water intake pipe sealing ring, so that the water sample is not connected with the outside world after lifting, thereby ensuring the accuracy of the water sample. The device is simple to process, easy to install and use, and has a fast water sample extraction speed. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 The present invention is a schematic diagram of the structure of a fixed-depth water extraction device for sampling groundwater through drilling.
[0008] Among them: 1-water intake pipe, 2-hammer cover, 3-hammer bottom, 4-steel shaft, 5-drain valve, 6-steel wire rope, 11-water intake chamber, 12-water intake pipe sealing ring, 41-water inlet hole, 42-locating pin, 43-steel shaft sealing ring. DETAILED DESCRIPTION
[0009] Embodiment 1: A fixed-depth water-intake device for sampling groundwater in a borehole, comprising a water-intake pipe 1, a hammer cover 2, a hammer bottom 3 and a steel shaft 4. The interior of the water-intake pipe 1 is hollow to form a water-intake chamber 11. The top and bottom of the water-intake pipe 1 are respectively arranged as slope ports matching the hammer cover 2 and the hammer bottom 3, and a water-intake pipe sealing ring 12 is arranged on the port. The steel shaft 4 is hollow and a conical seal is arranged on the top. A steel wire rope 6 is connected to the seal, and a scale is marked on the steel wire rope 6; a drain valve 5 is connected to the bottom of the steel shaft 4, and a water inlet hole 41 is provided in the middle and lower part; the steel shaft penetrates the positioning pin 42, the hammer bottom 3, the water-intake pipe 1 and the hammer cover 2 in sequence from bottom to top, and the positioning pin 42 is fixedly connected to the steel shaft 4, a steel shaft sealing ring 43 is arranged at the intersection of the steel shaft 4 and the top and bottom of the hammer bottom 3, and a steel shaft sealing ring 43 is arranged at the intersection of the steel shaft 4 and the top of the hammer cover 2.
[0010] When in use, one end of the steel shaft 6 is passed through the positioning pin 42, the hammer cover 2, the water intake pipe 1, and the hammer bottom 3 in sequence and then connected to the drain valve 5, and the hammer cover 2, the water intake pipe 1 and the hammer bottom 3 are ensured to be separated from each other. First, the steel wire rope 6, the steel shaft 4 and the hammer bottom 3 are lowered to the designated hole depth position, and the hammer bottom is tightly attached to the positioning pin 42 under the action of gravity, and the upper end of the steel wire rope 6 is fixed at this time. Then, the water intake pipe 1 is lowered until it contacts the hammer bottom 3. Since the upper and lower ends of the water intake pipe 1 are hollow during the process of lowering the water intake pipe 1, water will enter from the lower end of the water intake pipe 1 and then be discharged from the upper end. After the water intake pipe 1 is lowered to the position of the hammer bottom 3, the wire rope 6 can be slightly lifted to make the hammer bottom 3 cooperate with the sealing ring 12 at the bottom port of the water intake pipe 1 to seal the bottom of the water intake pipe 1; then, the hammer cover 2 is lowered until it contacts the water intake pipe 1. Under the action of gravity, the hammer cover 2 and the water intake pipe sealing ring 12 are tightly sealed. At this time, the water intake pipe is filled with water samples of the corresponding hole depth. Finally, the water intake device is slowly lifted up by the steel wire rope 6. At the beginning of the lifting, the hammer cover 2 is further compressed and sealed against the top port of the water intake pipe 1 due to the pressure of the water, and the hammer bottom 3 is prevented from being pressed away from the water intake pipe 1 by the positioning pin 42. At this time, the top and bottom ports are sealed by the hammer cover 2 and the hammer bottom 3 respectively, and the steel shaft 4 is sealed with the hammer cover 2 and the hammer bottom 3 by the steel shaft sealing ring 43, thereby preventing the water sample from being contaminated during the lifting process.
Claims
1. A fixed-depth water extraction device for sampling groundwater in a borehole, characterized in that: It includes a water intake pipe, a hammer cover, a hammer bottom and a steel shaft. The water intake pipe is hollow inside to form a water intake cavity. The top and bottom of the water intake pipe are respectively arranged as slope ports matching the hammer cover and the hammer bottom, and water intake pipe sealing rings are arranged on the ports. The steel shaft is hollow and a conical seal is arranged on the top. The sealing part is connected with a steel wire rope. The bottom of the steel shaft is connected with a drain valve, and a water inlet hole is opened in the middle and lower parts. The steel shaft penetrates the positioning pin, the hammer bottom, the water intake pipe and the hammer cover from bottom to top in sequence, and the positioning pin is fixedly connected to the steel shaft. Steel shaft sealing rings are arranged at the intersections between the steel shaft and the top and bottom of the hammer bottom, and a steel shaft sealing ring is arranged at the intersection between the steel shaft and the top of the hammer cover.
2. A fixed-depth water extraction device for drilling groundwater sampling according to claim 1, characterized in that The steel wire rope is provided with a scale.