Side pressure gauge

Abstract

The utility model relates to the field of lateral pressure instruments, in particular to a lateral pressure instrument which is characterized in that a first pressure guide pipe, a second pressure guide pipe and a water injection pipe are connected to the lateral pressure instrument, the first pressure guide pipe is connected with a high-pressure nitrogen bottle, the second pressure guide pipe is connected with a visual inspection pipe, and the water injection pipe is connected with a water tank; a nitrogen source valve is arranged on a connecting pipe of the high-pressure nitrogen bottle, a high-pressure gauge is arranged behind the nitrogen source valve, a pressure reducing valve is arranged behind the high-pressure gauge, and a low-pressure gauge is arranged behind the pressure reducing valve. According to the utility model, the high-pressure nitrogen bottle, the visual inspection pipe and the water tank are all connected with the bypass pressure device by using the first pressure guide pipe, the second pressure guide pipe and the water injection pipe, so that a target area can be conveniently measured, the number of operation steps required by a user during use is small, the operation difficulty is low, and the use of the user is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of pressure meter technology, and in particular to pressure meter. Background Technology

[0002] A pressuremeter is a physical property testing instrument used in the fields of mechanics and civil engineering. It measures the deformation and stress-strain relationship of soil or soft rock by placing a probe with a rubber diaphragm in a borehole and applying pressure to the inside of the probe, causing it to expand and compress the surrounding soil or soft rock.

[0003] Traditional pressure gauges require strict adherence to operating procedures during testing, including drilling, installing the gauge, applying pressure, and recording data. This process is quite complex, and if the operator lacks sufficient skill or performs improper operation, the accuracy and reliability of the test results will be affected. Therefore, there is an urgent need for a pressure gauge that is easier to operate. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a pressure-spotting device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A pressure gauge includes a pressure gauge unit, which is connected to a first pressure guiding pipe, a second pressure guiding pipe, and a water injection pipe. The first pressure guiding pipe is connected to a high-pressure nitrogen cylinder, the second pressure guiding pipe is connected to a visual inspection pipe, and the water injection pipe is connected to a water tank. A nitrogen source valve is installed on the connecting pipe of the high-pressure nitrogen cylinder. A high-pressure gauge is installed after the nitrogen source valve. A pressure reducing valve is installed after the high-pressure gauge, and a low-pressure gauge is installed after the pressure reducing valve.

[0007] Furthermore, in a preferred configuration, the bypass valve has an upper chamber, a middle chamber, and a lower chamber, with the upper and lower chambers interconnected, and the middle chamber not connected to the upper or lower chambers.

[0008] In addition, a preferred configuration is that the water tank is connected to the water injection pipe via a quick connector, and the water tank is equipped with a water injection valve.

[0009] In addition, in a preferred configuration, the visual inspection tube is connected to the second pressure guide tube via a quick connector, the visual inspection tube is equipped with a zero adjustment valve and a test tube valve, and a test water injection switching valve is provided at the rear of the visual inspection tube.

[0010] Furthermore, in a preferred configuration, a first low-pressure gauge and a second low-pressure gauge are provided on the first pressure-conducting pipe, and a low-pressure gauge valve is provided on the first low-pressure gauge.

[0011] In addition, a preferred structure is that a pressure gauge is provided on the first pressure guide tube, a pressure regulating valve is provided behind the pressure gauge, and the end of the first pressure guide tube is connected to a high-pressure nitrogen cylinder through a quick connector.

[0012] The beneficial effects of this utility model are as follows: by using the first pressure guiding pipe, the second pressure guiding pipe and the water injection pipe to connect the high-pressure nitrogen cylinder, the visual inspection pipe and the water tank together with the pressure bypass device, convenient measurement of the target area can be realized. The user needs to perform fewer steps and the operation is simpler, making it easy for the user to use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the pressure gauge proposed in this utility model.

[0014] In the diagram: 1. Pressure bypass device, 11. First pressure guide pipe, 111. Pressure regulator, 112. Pressure regulator valve, 12. Second pressure guide pipe, 13. Water injection pipe, 14. Upper chamber, 15. Middle chamber, 16. Lower chamber, 2. Water tank, 21. Water injection valve, 3. Visual inspection pipe, 31. Zero adjustment valve, 32. Measuring pipe valve, 4. First low pressure gauge, 41. Low pressure gauge valve, 5. First high pressure gauge, 6. High pressure nitrogen cylinder, 61. Nitrogen source valve, 62. High pressure gauge, 63. Pressure reducing valve, 64. Low pressure gauge, 7. Quick connector, 8. Test water injection switching valve. Detailed Implementation

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] Reference Figure 1 The pressure gauge includes a pressure gauge 1, which is connected to a first pressure guiding pipe 11, a second pressure guiding pipe 12, and a water injection pipe 13. The first pressure guiding pipe 11 is connected to a high-pressure nitrogen cylinder 6, the second pressure guiding pipe 12 is connected to a visual inspection pipe 3, and the water injection pipe 13 is connected to a water tank 2. A nitrogen source valve 61 is installed on the connecting pipe of the high-pressure nitrogen cylinder 6. A high-pressure gauge 62 is installed downstream of the nitrogen source valve 61, a pressure reducing valve 63 is installed downstream of the high-pressure gauge 62, and a low-pressure gauge 64 is installed downstream of the pressure reducing valve 63.

[0017] The pressure bypass device 1 has an upper chamber 14, a middle chamber 15, and a lower chamber 16. The upper chamber 14 and the lower chamber 16 are interconnected, while the middle chamber 15 is not connected to the upper chamber 14 or the lower chamber 16. The water tank 2 is connected to the water injection pipe 13 via a quick connector 7, and the water tank 2 is equipped with a water injection valve 21.

[0018] The visual inspection tube 3 is connected to the second pressure guide tube 12 via a quick connector 7, and the visual inspection tube 3 is equipped with a zero adjustment valve 31 and a test tube valve 32.

[0019] The first pressure guiding pipe 11 is equipped with a first low-pressure gauge 4 and a second low-pressure gauge 5, and the first low-pressure gauge 4 is equipped with a low-pressure gauge valve 41. A pressure regulating gauge 111 is installed on the first pressure guiding pipe 11, and a pressure regulating valve 112 is installed behind the pressure regulating gauge 111. The end of the first pressure guiding pipe 11 is connected to the high-pressure nitrogen cylinder 6 through a quick connector 7.

[0020] In this embodiment, water tank 2 is first filled with distilled water or clean cooled boiled water to keep the pipeline clean and reduce air bubbles in the water. Throughout the entire test, the safety valve of water tank 2 needs to remain open to prevent accidental operation from introducing high-pressure test water, which could cause water tank 2 to burst.

[0021] The user can then connect the pipeline and insert the first pressure guide tube 11 and the second pressure guide tube 12 on the bypass 1 into the corresponding sockets on the measuring panel via the quick connector 7.

[0022] Next, fill the pressure gauge 1 and deformation measurement system with water. Erect the pressure gauge 1 on the ground, close the zeroing valve 31, open the water injection valve 13 and the test tube valve 32, and turn the test water injection switching valve 8 to the water injection position (at this time, the test water injection switching valve is directly open to the atmosphere). Tighten the cap of the water tank 2, connect the air pump to the pressurization point of the water tank 2 to apply slight pressure (0.01-0.02 MPa), and simultaneously shake the pressure gauge and nylon tubing to expel air from the pressure gauge 1 and the pipes. When the water level in the test tube reaches approximately 15 cm, slowly fill the tank (because filling too quickly can cause water to rush into the pressure regulating valve and precision pressure gauge, affecting accuracy and service life). If the water filling is too fast, first close the test tube valve 32 and open the cap of the water tank 2 to release the pressure, then open the test tube valve 32 again; the water level will continue to rise. The water level should be 0 or slightly above 0. After the water injection is completed, close the water injection valve 13; turn the test water injection switching valve 8 to the test position.

[0023] Then, vertically raise the bypass valve 1 until the midpoint of the central cavity 15 is level with the zero mark on the visual tube 3. Open the zero-adjustment valve 31 and closely monitor the water level. When the water level drops to zero, immediately close the zero-adjustment valve 31. At this time, the central cavity 15 of the bypass valve 1 is not under hydrostatic pressure, and its elastic diaphragm is in a non-expanded state.

[0024] Next, lower the pressure gauge 1 into the borehole to the predetermined test depth. Then, open the visual inspection tube 3 (Note: This valve can only be opened after the pressure gauge 1 has been lowered to the predetermined test depth. If it is opened prematurely, water will be injected into the pressure gauge 1 due to hydrostatic pressure, causing the elastic membrane to expand significantly; making it difficult to lower the pressure gauge 1 to the predetermined test depth). At this time, hydrostatic pressure is generated in the pressure gauge 1. This pressure is the first-level pressure (this value should be added to the readings of all subsequent pressure gauges to obtain the total pressure of each level), and the reading should be kept stable.

[0025] Finally, connect the tubing to the high-pressure nitrogen cylinder 6 and open the low-pressure gauge valve 41. Turn the pressure reducing valve 63 counterclockwise to its loosest position (it should be closed at this point), then open the nitrogen source valve 61. Next, turn the pressure regulating valve 112 clockwise (i.e., first-stage pressurization) to reduce the high-pressure gas supply to 0.1–0.2 MPa higher than the required maximum test pressure. Slowly turn the pressure regulating valve 112 clockwise to adjust to the required test pressure, and gradually increase the pressure according to the relatively stable standard.

[0026] In this utility model, by using the first pressure guiding pipe 11, the second pressure guiding pipe 12 and the water injection pipe 13 to connect the high-pressure nitrogen cylinder 6, the visual inspection pipe 3 and the water tank 2 to the pressure bypass device, convenient measurement of the target area can be achieved. The user needs to perform fewer steps and the operation is simpler, making it easy for the user to use.

[0027] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pressure bypass device, comprising a pressure bypass unit (1), characterized in that, The pressure bypass device (1) is connected to a first pressure guide pipe (11), a second pressure guide pipe (12) and a water injection pipe (13). The first pressure guide pipe (11) is connected to the high-pressure nitrogen cylinder (6), the second pressure guide pipe (12) is connected to the visual inspection pipe (3), and the water injection pipe (13) is connected to the water tank (2). A nitrogen source valve (61) is provided on the connecting pipe of the high-pressure nitrogen cylinder (6). A high-pressure gauge (62) is provided behind the nitrogen source valve (61). A pressure reducing valve (63) is provided behind the high-pressure gauge (62). A low-pressure gauge (64) is provided behind the pressure reducing valve (63).

2. The pressure gauge according to claim 1, characterized in that, The bypass pressure device (1) has an upper chamber (14), a middle chamber (15) and a lower chamber (16) inside. The upper chamber (14) and the lower chamber (16) are interconnected, and the middle chamber (15) is not connected to the upper chamber (14) and the lower chamber (16).

3. The pressure gauge according to claim 2, characterized in that, The water tank (2) is connected to the water injection pipe (13) via a quick connector (7), and a water injection valve (21) is provided on the water tank (2).

4. The pressure gauge according to claim 3, characterized in that, The visual inspection tube (3) is connected to the second pressure guide tube (12) through a quick connector (7). The visual inspection tube (3) is equipped with a zero adjustment valve (31) and a test tube valve (32), and a test water injection switching valve (8) is provided behind the visual inspection tube (3).

5. The pressure gauge according to claim 4, characterized in that, The first pressure guide tube (11) is equipped with a first low pressure gauge (4) and a second low pressure gauge (5), and the first low pressure gauge (4) is equipped with a low pressure gauge valve (41).

6. The pressure gauge according to claim 5, characterized in that, A pressure regulator (111) is provided on the first pressure guide tube (11), a pressure regulating valve (112) is provided behind the pressure regulator (111), and the end of the first pressure guide tube (11) is connected to the high-pressure nitrogen cylinder (6) through a quick connector (7).

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