High-precision underground water level electrical measurement device

Abstract

The utility model discloses a high-precision underground water level electrical measurement device, which belongs to the field of borehole underground water level measurement, and comprises a universal meter positioned on the ground, the universal meter is connected with an anti-error measurement device through a coated wire, and the anti-error measurement device is positioned in a borehole; the false detection prevention device comprises a protection cylinder, a water insulation plug is arranged at the top of the protection cylinder, a connector used for being connected with a covered wire is arranged at the top of the water insulation plug, stand columns are symmetrically arranged on the lower end face of the water insulation plug, and the covered wire is wound around the stand columns. A water inlet is formed in the bottom of the protective cylinder, and an assembling connector is arranged below the water inlet. According to the utility model, a single line is changed into double lines to effectively prevent the measurement lines from being adsorbed on the hole wall, so that the measurement is lighter and false water level measurement is avoided; a counterweight joint is added to be suitable for measuring water levels of different depths.

Description

Technical Field

[0001] The utility model relates to the field of borehole groundwater level measurement, in particular to a high-precision electrical groundwater level measurement device. Background Art

[0002] The existing groundwater measurement methods are similar. The most commonly used and portable method is the electrical method for measuring water level. However, there are certain defects in deep well use. For example: ① For a single measuring line, one end of the ground needs to be grounded. When the ground conductivity is poor, it is difficult to obtain ideal results; for a single measuring line, when the hole wall is smooth, the adsorption force on the measuring line is strong, which hinders the retraction and release of the measuring line, and the measuring line is bent, resulting in errors in the water level; ② When the probe part contacts the hole wall, when there is water seepage in the hole wall, the measuring line may be energized to obtain a false groundwater level. Based on this, the utility model proposes a high-precision electrical groundwater level measuring device. Utility Model Content

[0003] The purpose of the utility model is to provide a high-precision device for electrically measuring groundwater level to solve the above-mentioned problems.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The utility model discloses a high-precision device for electrically measuring underground water level, comprising a multimeter located on the ground, the multimeter being connected to an anti-mismeasurement device via a covered wire, the anti-mismeasurement device being located in a borehole; the anti-mismeasurement device comprising a casing, a water stopper being arranged on the top of the casing, a connector for connecting with the covered wire being arranged on the top of the water stopper, columns being symmetrically arranged on the lower end surface of the water stopper, the covered wire being wound around the columns; a water inlet being arranged on the bottom of the casing, a fitting connection port being arranged below the water inlet.

[0006] Furthermore, the covered wire is a double wire.

[0007] Furthermore, the water inlet adopts a transverse incision structure.

[0008] Furthermore, a counterweight device is provided at the fitting connection port.

[0009] Furthermore, the covered wires are respectively wound around the pillars.

[0010] Furthermore, the water inlet is located below the groundwater level.

[0011] Compared with the prior art, the beneficial technical effects of the utility model are:

[0012] (1) Change the single line to a double line, use twisted pair cables, one positive and one negative, to connect the multimeter, so that one end of the multimeter does not need to be directly grounded, and the purpose of measuring the groundwater level is achieved; changing the single line to a double line effectively prevents the measurement line from being adsorbed on the hole wall;

[0013] (2) The measuring line material is covered wire, which is lighter;

[0014] (3) A protective tube is added to protect the probe inside the protective tube to avoid measuring false water levels;

[0015] (4) Add a counterweight joint to suit water level measurement at different depths;

[0016] (5) The main purpose of the two internal columns is to separate the twisted pair cables and fix the cables for use. A hole is drilled in the middle of the column to ensure that the center of gravity of the counterweight probe is centered while adding counterweights. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 This is the structural diagram of the utility model high-precision electrical underground water level measuring device;

[0019] Figure 2 This is a partial enlarged view of the utility model's high-precision electrical underground water level measuring device;

[0020] Explanation of the reference numerals: 1. multimeter; 2. covered wire; 3. drilling hole; 4. device for preventing false detection; 401. water stopper; 402. connector; 403. column; 404. casing; 405. water inlet; 406. fitting connector. DETAILED DESCRIPTION

[0021] like Figure 1-2 As shown, a high-precision electrical groundwater level measuring device includes a multimeter 1 located on the ground, and the multimeter 1 is connected to an anti-mismeasurement device 4 through a covered wire 2. The covered wire 2 adopts a double wire, which solves the problem of inaccurate measurement when the single wire grounding condition is poor, and the problem that when the hole wall is smooth and there is a water film, the single wire is very likely to be adsorbed on the hole wall and increase the measurement error. In addition, the covered wire is light in weight and has a high tensile strength, which is easier to carry and measure deep wells.

[0022] The anti-mismeasurement device 4 is located in the borehole 3, and includes a casing 404. A water stopper 401 is provided on the top of the casing 404. A connector 402 for connecting with the covered wire 2 is provided on the top of the water stopper 401 to prevent the probe part from contacting the hole wall to energize the measuring wire and obtain a false groundwater level when there is water seepage in the hole wall. Columns 403 are symmetrically provided on the lower end surface of the water stopper 401. The covered wire 2 is wound around the columns 403. Two covered wires 2 are respectively wound around the columns 403, effectively separating the double wires. A water inlet 405 is provided at the bottom of the casing 404. The water inlet 405 adopts a transverse incision structure. A fitting connection port 406 is provided below the water inlet 405. A counterweight device is provided at the fitting connection port 406. When measuring different hole depths, the device counterweight is adjusted to keep the measuring wire vertical.

[0023] The water inlet 405 is located below the groundwater level.

[0024] In addition, a hole is punched in the middle of the column 403 to ensure that the center of gravity of the counterweight probe is centered while adding a counterweight.

[0025] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A high-precision electrical groundwater level measuring device, characterized in that: The invention comprises a multimeter (1) located on the ground, wherein the multimeter (1) is connected to an anti-misdetection device (4) via a covered wire (2), and the anti-misdetection device (4) is located in a borehole (3); the anti-misdetection device (4) comprises a casing (404), a water stopper (401) is arranged on the top of the casing (404), a connector (402) used for connecting with the covered wire (2) is arranged on the top of the water stopper (401), columns (403) are symmetrically arranged on the lower end surface of the water stopper (401), and the covered wire (2) is wound around the columns (403); a water inlet (405) is arranged at the bottom of the casing (404), and a fitting connection port (406) is arranged below the water inlet (405); the covered wire (2) adopts a double wire.

2. The high-precision electrical groundwater level measuring device according to claim 1 is characterized in that: The water inlet (405) adopts a transverse incision structure.

3. The high-precision electrical groundwater level measuring device according to claim 1 is characterized in that: A counterweight device is provided at the fitting connection port (406).

4. The high-precision electrical groundwater level measuring device according to claim 1 is characterized in that: The covered wires (2) are respectively wound around the uprights (403).

5. The high-precision electrical groundwater level measuring device according to claim 1, characterized in that: The water inlet (405) is located below the groundwater level.

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