Permanent magnet inclinometer based on horizontal liquid level

Abstract

The permanent magnet inclinometer based on the horizontal liquid level comprises a supporting shell and a buoyancy cylinder, the supporting shell is provided with an inner cavity for the buoyancy cylinder to be inserted, the upper end of the supporting shell is provided with an opening communicated with the inner cavity, and a left permanent magnet block and a right permanent magnet block are embedded in the side wall of the inner cavity of the supporting shell in a left-right symmetry mode. The buoyancy cylinder is inserted into an inner cavity of the supporting shell from the opening and filled with liquid, the liquid level of the liquid in the buoyancy cylinder in the vertical state is located between the left permanent magnet block and the right permanent magnet block, a floating plate floats above the liquid, a gauss meter detection piece is arranged in the middle of the upper end of the floating plate, and the upper end of the gauss meter detection piece is connected with a transmitting line. The transmitting wire penetrates out of the buoyancy cylinder and is used for transmitting information. According to the device, the soil body change is accurately reflected by utilizing the inclination change of the whole supporting shell and the buoyancy cylinder along with the displacement of the soil body, magnetic field change parameters are obtained by utilizing the Gaussian meter detection sheet which is always kept in a vertical state, the displacement change condition of the soil body is calculated according to the obtained parameters, and the device is convenient to use and low in test cost.

Description

Technical Field

[0001] This utility model relates to the field of exploration equipment technology, specifically to a permanent magnet inclinometer based on horizontal liquid level. Background Technology

[0002] In the southeastern coastal region, Quaternary sediments are widely distributed, and engineering construction sites expose various types of soft soil layers with poor engineering properties. These strata are thick and highly susceptible to deformation. If soil deformation is not properly controlled, it often leads to geotechnical engineering disasters such as foundation pit collapse and excessive settlement and deformation of surrounding buildings. Accurate monitoring of lateral soil deformation is fundamental to controlling and predicting these disasters. Currently, probe-type inclinometers are one of the commonly used instruments for monitoring the horizontal displacement of soil under compression deformation.

[0003] The probe-type inclinometer consists of an inclinometer tube, guide rail, probe, and decoder. The inclinometer tube is buried in the foundation through drilling, and then soil is backfilled between the inclinometer tube and the borehole to ensure complete coupling between soil deformation and inclinometer tube deformation, thus completing the installation. During monitoring, the probe is manually placed inside the inclinometer tube. First, the probe is lowered to the bottom along the guide rail, and then the probe is raised sequentially to measure the inclination angle at each depth, and the readings are returned to the decoder. However, this method requires manual operation and point-by-point measurements, which is labor-intensive and time-consuming. Furthermore, some areas of soft soil foundations have high exposed surfaces, posing safety hazards for non-construction personnel working on them for extended periods.

[0004] Therefore, there is an urgent need for a permanent magnet inclinometer based on horizontal liquid level to solve the problems of high work intensity and high safety hazards that exist when conventional monitoring instruments measure soil displacement and deformation. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a permanent magnet inclinometer based on horizontal liquid level, which solves the problems of high workload and high safety hazards that exist when conventional monitoring instruments measure soil displacement and deformation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A permanent magnet inclinometer based on a horizontal liquid level is characterized by: a support shell and a buoyancy cylinder. The support shell has an inner cavity into which the buoyancy cylinder can be inserted. The upper end of the support shell is an opening communicating with the inner cavity. A left permanent magnet block and a right permanent magnet block are symmetrically embedded on the side walls of the inner cavity of the support shell, respectively. The buoyancy cylinder is inserted into the inner cavity of the support shell through the opening. The inside of the buoyancy cylinder is filled with liquid. In a vertical state, the liquid level in the buoyancy cylinder is located between the left and right permanent magnet blocks. A float plate floats above the liquid. A gaussmeter probe is provided at the middle of the upper end of the float plate. The upper end of the gaussmeter probe is connected to a transmission line. The transmission line passes through the buoyancy cylinder and is used to transmit information.

[0008] To optimize the above technical solution, the specific measures also include:

[0009] Furthermore, it also includes a positioning bolt. The side wall of the support shell has a positioning hole that extends into the inner cavity. The positioning hole has an internal thread. The positioning bolt is threaded into the positioning hole and presses against the side wall of the buoyancy cylinder.

[0010] Furthermore, a groove is provided around the outside of the positioning hole to allow the positioning bolt to be completely submerged.

[0011] Furthermore, two positioning holes are provided symmetrically on the left and right sides.

[0012] Furthermore, the lower end of the support shell is provided with a conical nail head with the tip pointing downwards.

[0013] Furthermore, it also includes a sealing cap that covers the opening at the upper end of the support shell, and the transmission line passes through the buoyancy cylinder and the sealing cap in sequence.

[0014] Furthermore, both the buoyancy cylinder and the sealing cover are provided with openings through which the transmission line can pass.

[0015] Furthermore, the liquid level in the vertically positioned buoyancy cylinder is located at the middle of the left and right permanent magnet blocks.

[0016] The beneficial effects of this utility model are:

[0017] This invention utilizes the tilting changes of the supporting shell and buoyancy cylinder as the soil under pressure and deformation undergoes displacement to accurately reflect soil changes. Simultaneously, by leveraging the characteristic that the floating plate inside the buoyancy cylinder and its gaussmeter probe remain vertical, the magnetic flux passing through the gaussmeter probe changes continuously with the tilt of the left and right permanent magnet blocks, causing a gradual change in magnetic field strength. Monitoring personnel only need to calculate the tilt angle of the supporting shell and buoyancy cylinder based on the gaussmeter probe readings to determine the soil displacement. No on-site probe operation is required; only rapid reading of magnetic field strength and other data is needed. This device is convenient to use, requires minimal time and manpower / material consumption at the testing site, is easy to operate, and has low testing costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the vertical state of a permanent magnet inclinometer based on a horizontal liquid level proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the tilt state of a permanent magnet inclinometer based on a horizontal liquid level proposed in this utility model.

[0020] Figure 3 This is a top view of the float structure of a permanent magnet inclinometer based on horizontal liquid level proposed in this utility model.

[0021] Reference numerals: 1. Nail head; 2. Support shell; 3. Liquid; 4. Float; 5. Right permanent magnet block; 6. Gaussmeter probe; 7. Sealing cover; 8. Transmitter line; 9. Left permanent magnet block; 10. Buoyancy cylinder; 11. Positioning hole. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings.

[0023] As attached Figure 1 and attached Figure 3 As shown in the figure, a permanent magnet inclinometer based on a horizontal liquid level according to an embodiment of the present invention includes a support shell 2 and a buoyancy cylinder 10. The support shell 2 has an inner cavity into which the buoyancy cylinder 10 can be inserted. The upper end of the support shell 2 is an opening communicating with the inner cavity. A left permanent magnet block 9 and a right permanent magnet block 5 are symmetrically embedded on the side wall of the inner cavity of the support shell 2, respectively. The buoyancy cylinder 10 is inserted into the inner cavity of the support shell 2 through the opening. The inside of the buoyancy cylinder 10 is filled with liquid 3. In the vertical state, the liquid level of the buoyancy cylinder 10 is located between the left permanent magnet block 9 and the right permanent magnet block 5. A float plate 4 floats above the liquid 3. A gaussmeter probe 6 is provided at the middle of the upper end of the float plate 4. A transmitter line 8 is connected to the middle of the upper end of the gaussmeter probe 6. The transmitter line 8 passes through the buoyancy cylinder 10 and is used to transmit information.

[0024] As attached Figure 2 As shown, when the soil being tested is deformed by compression and displacement, the device of this invention utilizes the tilting change of the support shell 2 and the buoyancy cylinder 10 as the soil shifts to accurately reflect the soil changes. Simultaneously, taking advantage of the fact that the floating plate 4 inside the buoyancy cylinder 10 and its gaussmeter probe 6 remain vertical, the magnetic flux passing through the gaussmeter probe 6 changes continuously with the tilt of the left permanent magnet block 9 and the right permanent magnet block 5 as the support shell 2 tilts, causing the magnetic field strength data to gradually change. Monitoring personnel only need to calculate the tilt angle of the support shell 2 and the buoyancy cylinder 10 based on the monitoring results of the gaussmeter probe 6 to obtain the soil displacement changes. No on-site probe operation is required; only rapid reading of magnetic field strength and other data is needed. This device is convenient to use, requires less time and manpower / material consumption at the testing site, is easy to operate, and has low testing costs.

[0025] Meanwhile, the insertion relationship between the support shell 2 and the buoyancy cylinder 10 allows for easy removal of the buoyancy cylinder 10, facilitating replacement or repair of the buoyancy cylinder 10 as needed.

[0026] In one specific embodiment based on the above, a positioning bolt is also included. A positioning hole 11 extending into the inner cavity is provided on the side wall of the support shell 2. The positioning hole 11 has an internal thread, and the positioning bolt is threaded into the positioning hole 11 and presses against the side wall of the buoyancy cylinder 10. Thus, during use, the positioning bolt, threaded into the positioning hole 11 and pressing against the side wall of the buoyancy cylinder 10, can achieve relative fixation of the buoyancy cylinder 10, preventing displacement of the buoyancy cylinder 10 during use and thus avoiding any impact on its accuracy.

[0027] The aforementioned positioning hole 11 is further provided with a groove around its outer side, allowing the positioning bolt to be fully submerged. This prevents the positioning bolt protruding from the outside of the support shell 2 from interfering with the displacement of the support shell 2 with the soil.

[0028] The aforementioned positioning holes 11 are provided symmetrically on both sides. This enhances the fixation effect on the buoyancy cylinder 10.

[0029] In another specific embodiment based on the above, the lower end of the support shell 2 is provided with a tapered nail head 1 with the tip pointing downwards. This facilitates the embedding of the support shell 2 into the soil.

[0030] In another specific embodiment based on the above, a sealing cover 7 is also included. The sealing cover 7 covers the opening at the upper end of the support shell 2, and the transmission line 8 passes through the buoyancy cylinder 10 and the sealing cover 7 in sequence. In this way, the stability and sealing of the buoyancy cylinder 10 within the support shell 2 can be increased by the sealing cover 7, and soil intrusion can be avoided to a certain extent.

[0031] Both the buoyancy cylinder 10 and the sealing cover 7 have openings for the transmission line 8 to pass through. In this design, a sealing ring can be installed inside the opening as needed.

[0032] In another specific embodiment based on the above, the liquid level of the liquid 3 in the vertical buoyancy cylinder 10 is located in the middle of the left permanent magnet block 9 and the right permanent magnet block 5.

[0033] In use, this device is placed in a pre-dug measuring hole, the transmitter line 8 is connected along the hole, and backfilling completes the installation. When the device tilts, the left permanent magnet block 9 and the right permanent magnet block 5 also tilt synchronously, but the liquid surface 3 remains horizontal. The gaussmeter probe 6 remains vertical under the action of the float plate 4. Based on the Hall effect of the gaussmeter probe, the magnetic flux of the uniform magnetic field between the left and right permanent magnet blocks 9 and 5 passing through the gaussmeter probe 6 gradually decreases. Different tilt angles correspond to different magnetic flux, therefore, different tilt angles correspond to different magnetic field strength data. In use, the device can be pre-calibrated in the laboratory to obtain a one-to-one correspondence between the probe tilt angle and the magnetic flux, and then the lateral displacement of the device can be calculated.

[0034] It should be noted that the terms such as "upper", "lower", "left", "right", "front", and "back" used in this utility model are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0035] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should be considered within its protection scope.

Claims

1. A permanent magnet inclinometer based on horizontal liquid level, characterized in that: The support shell (2) and the buoyancy cylinder (10) are provided. The support shell (2) has an inner cavity into which the buoyancy cylinder (10) can be inserted. The upper end of the support shell (2) is an opening that communicates with the inner cavity. The left permanent magnet block (9) and the right permanent magnet block (5) are symmetrically embedded on the side wall of the inner cavity of the support shell (2). The buoyancy cylinder (10) is inserted into the inner cavity of the support shell (2) through the opening. The buoyancy cylinder (10) is filled with liquid (3). The liquid level of the liquid (3) in the vertical buoyancy cylinder (10) is located between the left permanent magnet block (9) and the right permanent magnet block (5). A float plate (4) floats above the liquid (3). A gaussmeter probe (6) is provided in the middle of the upper end of the float plate (4). The upper end of the gaussmeter probe (6) is connected to a transmitter line (8). The transmitter line (8) passes through the buoyancy cylinder (10) and is used to transmit information.

2. The permanent magnet inclinometer based on horizontal liquid level according to claim 1, characterized in that: It also includes a positioning bolt. The side wall of the support shell (2) is provided with a positioning hole (11) that extends into the inner cavity. The positioning hole (11) is provided with an internal thread. The positioning bolt is threaded into the positioning hole (11) and presses against the side wall of the buoyancy cylinder (10).

3. The permanent magnet inclinometer based on horizontal liquid level according to claim 2, characterized in that: The outer side of the positioning hole (11) is also provided with a storage groove that allows the positioning bolt to be completely submerged.

4. A permanent magnet inclinometer based on a horizontal liquid level according to claim 2, characterized in that: The positioning holes (11) are provided symmetrically on the left and right.

5. A permanent magnet inclinometer based on a horizontal liquid level according to claim 1, characterized in that: The lower end of the support shell (2) is provided with a conical nail head (1) with the tip pointing downwards.

6. A permanent magnet inclinometer based on a horizontal liquid level according to claim 1, characterized in that: It also includes a sealing cover (7), which covers the opening at the upper end of the support shell (2), and the transmission line (8) passes through the buoyancy cylinder (10) and the sealing cover (7) in sequence.

7. A permanent magnet inclinometer based on a horizontal liquid level according to claim 6, characterized in that: Both the buoyancy cylinder (10) and the sealing cover (7) have openings through which the transmission line (8) can pass.

8. A permanent magnet inclinometer based on a horizontal liquid level according to claim 1, characterized in that: The liquid level of the liquid (3) in the vertical buoyancy cylinder (10) is located in the middle of the left permanent magnet block (9) and the right permanent magnet block (5).

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