Swell capacity verification system of borehole dilatometer

Abstract

The utility model provides an expansion capacity verification system of a borehole dilatometer. Comprising a first hydraulic pump, an oil outlet pipe pressure gauge, an oil return pipe pressure gauge, a displacement sensor, a hydraulic sensor used for detecting the hydraulic pressure of an oil outlet pipeline, a calibration liquid containing cavity shell, a water drainage pipe used for draining measurement water, a hydraulic sensor used for measuring the displacement variation of a hydraulic push rod and a signal input device. The front section part of the metal structure shell of the borehole dilatometer is embedded into the calibration liquid cavity shell from the opening of the calibration liquid cavity shell; a second enamel disc is annularly arranged on an opening of the calibration liquid containing cavity shell, a first enamel disc is arranged on the outer wall of the rear section part of the metal structure shell of the borehole dilatometer in a sleeving manner, and a measurement water body sealing cavity is formed between the calibration liquid containing cavity shell and the front section part through sealing installation of the two enamel discs; according to the utility model, the swell capacity verification accuracy of the borehole dilatometer is improved, and detection, installation and debugging are convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of borehole dilatation gauge calibration in hydropower and water conservancy projects, and specifically to a borehole dilatation gauge expansion measurement calibration system. Background Technology

[0002] The "Code for Rock Testing in Hydropower and Water Conservancy Projects" (DL / T 5368-2007) specifies that borehole dilatometers or borehole jacks can be used for radial pressure testing of intact and relatively intact rock masses. A schematic diagram of the borehole dilatometer is attached to the instruction manual. Figure 1 As shown, the borehole dilatometer uses a third hydraulic pump 31, a third hydraulic pipeline 33, a third hydraulic module 36, and a third control valve 37 to expand the third expansion module 38 (which includes a third rubber bladder 39) to compress the rock mass for testing. The expansion amount and pressure value of the third expansion module 38 are displayed and recorded by the third reading instrument 41.

[0003] To ensure the accuracy of the test data, the force value and expansion amount displayed by the third reading instrument 41 must be consistent with those actually generated by the third expansion module 38. Currently, the industry only has devices for verifying (calibrating) the force value of borehole expansion gauges, but lacks devices for calibrating their expansion amount. Utility Model Content

[0004] In view of this, it is necessary to propose a borehole dilatation gauge expansion verification system to overcome the shortcomings of the above-mentioned background technology and solve the following technical problem: how to improve the accuracy of borehole dilatation gauge expansion verification under the condition of convenient installation and verification.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model proposes an expansion calibration system for a borehole dilatometer, used to calibrate a borehole dilatometer. The borehole dilatometer includes a metal structural housing, an outward expansion diaphragm sleeve, and an oil-sealed hydraulic push rod mechanism. The metal structural housing, as the main body of the borehole dilatometer, has a tubular structure. The metal structural housing includes an integral front section and a rear section. The front section can be reset and expanded under internal water pressure, and the rear section is hydraulically squeezed to the front section. A water flow channel is provided inside the metal structural housing, and a water-containing cavity is provided inside the rear section. The outward expansion diaphragm sleeve is fitted onto the outer wall of the front section, and the edge of the outward expansion diaphragm sleeve is sealed to the outer wall of the front section. When the outward expansion... When the water pressure on the inner membrane surface of the membrane sleeve exceeds a certain amount, a water-filled variable space is formed between the inner membrane surface of the outwardly expanding membrane sleeve and the outer wall of the front section. The two ends of the water flow channel are respectively connected to the water-containing cavity and the water-filled variable space. When the water pressure on the inner membrane surface of the outwardly expanding membrane sleeve is not greater than another certain amount, a gap is formed between the inner membrane surface of the outwardly expanding membrane sleeve and the outer wall of the front section. The oil-sealed hydraulic push rod mechanism is located in the rear section and is situated behind the water-containing cavity. The oil-sealed hydraulic push rod mechanism is used to change the volume of the water-containing cavity through the hydraulic push rod of the oil-sealed hydraulic push rod mechanism, thereby changing the volume of the water-filled variable space. This expansion amount verification system includes:

[0007] The first hydraulic pump is located outside the metal structure housing; the first hydraulic pump hydraulically controls the hydraulic push rod action of the oil seal hydraulic push rod mechanism through an oil outlet pipe and an oil return pipe.

[0008] An oil outlet pressure gauge is used to detect the oil outlet pressure in the oil outlet pipe.

[0009] The return oil pressure gauge is used to detect the return oil pressure in the return oil pipeline.

[0010] A displacement sensor is installed in the rear section to detect the displacement change of the hydraulic push rod of the oil seal hydraulic push rod mechanism and output the displacement change signal in real time.

[0011] The calibration liquid chamber housing has a tubular structure; one end of the calibration liquid chamber housing is open, and the front section is inserted into the calibration liquid chamber housing through the opening; a second enamel disk is provided around the opening of the calibration liquid chamber housing, and a first enamel disk is fitted on the outer wall of the rear section; the sealing installation of the second enamel disk and the first enamel disk forms a water measurement sealed chamber between the calibration liquid chamber housing and the front section; the outer membrane surface of the outward expansion membrane sleeve is part of the inner wall of the water measurement sealed chamber; when the outward expansion membrane sleeve expands outward, the volume of the water-filled variable space increases, and the volume of the water measurement sealed chamber decreases.

[0012] The drain pipe has one end connected to the outside and the other end connected to the sealed chamber for measuring water. It is used to drain the measuring water when the volume of the sealed chamber decreases.

[0013] A hydraulic sensor is used to detect the hydraulic pressure in the oil outlet pipeline and output the hydraulic detection signal in real time.

[0014] The signal input device is connected to the hydraulic sensor and the displacement sensor for communication.

[0015] Furthermore, an exhaust branch pipe is also provided on the side wall of the drain pipe.

[0016] Furthermore, a water injection branch pipe is also provided on the side wall of the exhaust branch pipe.

[0017] Furthermore, the other end of the calibration liquid chamber housing is sealed by a sealing end cap, and the drain pipe seal passes through the sealing end cap and communicates with the sealed chamber of the measuring water.

[0018] Furthermore, the expansion calibration system of the borehole dilatometer also includes an electronic scale;

[0019] The electronic scale is connected to a signal input device for communication; the electronic scale is used to weigh the water flowing out of the sealed chamber of the measuring water body through the drain pipe.

[0020] The beneficial effects of this utility model are as follows:

[0021] This invention improves the accuracy of borehole dilatation gauge expansion measurement, facilitates testing, installation and debugging, and is easy to carry; especially in water conservancy projects, this invention enables rapid installation and accurate measurement. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a borehole dilatometer in the prior art;

[0023] Figure 2 This is a front structural cross-sectional view of a borehole dilatometer expansion verification system according to this utility model.

[0024] Figure 3 for Figure 2 A sectional view along the AA direction;

[0025] Explanation of reference numerals in the attached figures:

[0026] Third hydraulic pump 31; Third pressure gauge 32; Third hydraulic pipeline 33; Third cable 34; Third lifting device 35; Third hydraulic module 36; Third control valve 37; Third expansion module 38; Third rubber bladder 39; Third electronic compartment 40; Third reading instrument 41; Metal structure housing 14; Outward expansion diaphragm sleeve 19; Oil seal hydraulic push rod mechanism 16; Water flow channel 700; Water chamber 17; First hydraulic pump 11; Oil outlet pipe 13; Oil return pipe 500; Oil outlet pressure gauge 12; Oil return pressure gauge 800; Displacement sensor 15; Calibration liquid cavity housing 18; First enamel plate 300; Second enamel plate 400; Measuring water sealed chamber 900; Drain pipe 200; Signal input device 600; Exhaust branch pipe 2001; Water injection branch pipe 2002; Hydraulic sensor 1000; First piston 161; Hydraulic push rod 162; Second piston 164; Sealing ring 163; Oil cavity 165. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be further described clearly and completely below in conjunction with the embodiments of this utility model. It should be noted that the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] The terms “first,” “second,” “third,” and “fourth” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, the use of “first,” “second,” “third,” and “fourth” to designate a feature may explicitly or implicitly include one or more of that feature.

[0030] Example

[0031] like Figure 2 , Figure 3 As shown:

[0032] This embodiment proposes a borehole dilatation gauge expansion verification system for verifying a borehole dilatation gauge. The borehole dilatation gauge includes a metal structure housing 14, an outward expansion diaphragm sleeve 19, and an oil-sealed hydraulic push rod mechanism 16. The metal structure housing 14 serves as the main body of the borehole dilatation gauge and has a tubular structure. The metal structure housing 14 includes an integral front section and a rear section. The front section can be reset and expanded under internal water pressure, and the rear section is hydraulically squeezed to the front section. A water flow channel 700 is provided inside the metal structure housing 14, and a water-containing cavity 17 is provided inside the rear section. The outward expansion diaphragm sleeve 19 is sleeved on the outer wall of the front section, and the edge of the outward expansion diaphragm sleeve 19 is sealed to the outer wall of the front section. When the outward expansion diaphragm sleeve 19... When the water pressure on the inner membrane surface of the outwardly expanding membrane sleeve 19 exceeds a certain amount, a water-filled variable space is formed between the inner membrane surface of the outwardly expanding membrane sleeve 19 and the outer wall of the front section. The two ends of the water flow channel 700 are respectively connected to the water-containing cavity 17 and the water-filled variable space. When the water pressure on the inner membrane surface of the outwardly expanding membrane sleeve 19 is not greater than another certain amount, a gap is formed between the inner membrane surface of the outwardly expanding membrane sleeve 19 and the outer wall of the front section. The oil-sealed hydraulic push rod mechanism 16 is located in the rear section and is situated behind the water-containing cavity 17. The oil-sealed hydraulic push rod mechanism 16 is used to change the volume of the water-containing cavity 17 through the hydraulic push rod 162 of the oil-sealed hydraulic push rod mechanism 16, thereby changing the volume of the water-filled variable space. This expansion amount verification system includes:

[0033] The first hydraulic pump 11 is located outside the metal structure housing 14; the first hydraulic pump 11 hydraulically controls the hydraulic push rod 162 of the oil seal hydraulic push rod mechanism 16 through an oil outlet pipe 13 and an oil return pipe 500.

[0034] Oil outlet pressure gauge 12 is used to detect the oil outlet pressure of oil outlet pipe 13;

[0035] The 800 pressure gauge for the return oil pipe is used to detect the return oil pressure of the 500 return oil pipe.

[0036] Displacement sensor 15 is installed in the rear section to detect the displacement change of the hydraulic push rod 162 of the oil seal hydraulic push rod mechanism 16 and output the displacement change signal in real time.

[0037] The calibration liquid chamber housing 18 has a tubular structure; one end of the calibration liquid chamber housing 18 is open, and the front section is inserted into the calibration liquid chamber housing 18 through the opening; a second enamel disk 400 is provided around the opening of the calibration liquid chamber housing 18, and a first enamel disk 300 is sleeved on the outer wall of the rear section; the sealing installation of the second enamel disk 400 and the first enamel disk 300 forms a water measurement sealed chamber 900 between the calibration liquid chamber housing 18 and the front section; the outer membrane surface of the outward expansion membrane sleeve 19 is part of the inner wall of the water measurement sealed chamber 900; when the outward expansion membrane sleeve 19 expands outward, the volume of the water-filled variable space increases, and the volume of the water measurement sealed chamber 900 decreases.

[0038] Drainage pipe 200, one end of which is connected to the outside, and the other end of which is connected to the water measurement sealed chamber 900, is used to discharge the measurement water when the volume of the water measurement sealed chamber 900 decreases.

[0039] Hydraulic sensor 1000 is used to detect the hydraulic pressure in oil outlet pipe 13 and output the hydraulic detection signal in real time;

[0040] The signal input device 600 is connected to the hydraulic sensor 1000 and the displacement sensor 15 for communication.

[0041] Further optimized, the oil outlet pressure gauge 12 is calibrated by cooperating with the hydraulic sensor 1000, the displacement sensor 15 and the return oil pipe pressure gauge 800.

[0042] Ideally, an exhaust branch pipe 2001 is also provided on the side wall of the drain pipe 200.

[0043] Further optimized, the exhaust port of the exhaust branch pipe 2001 is horizontally higher than the outlet of the water measuring sealed chamber 900.

[0044] Ideally, a water injection branch pipe 2002 is also provided on the side wall of the exhaust branch pipe 2001.

[0045] Ideally, the other end of the calibration liquid chamber housing 18 is sealed by a sealing end cap, and the drain pipe 200 is sealed through the sealing end cap and communicates with the measuring water sealed chamber 900.

[0046] One optimization scheme is: the expansion calibration system of the borehole dilatometer also includes an electronic scale;

[0047] The electronic scale is connected to the signal input device 600 for communication; the electronic scale is used to weigh the water flowing out of the water body sealing chamber 900 through the drain pipe 200.

[0048] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An expansion volume calibration system of a borehole dilatometer, used for calibrating a borehole dilatometer, the borehole dilatometer comprising a metal structure shell (14), an outward expansion membrane sleeve (19) and an oil-sealed hydraulic push rod mechanism (16); the metal structure shell (14) serves as the main body of the borehole dilatometer and has a tub structure; the metal structure shell (14) comprises a front section and a rear section which are integrated, the front section is capable of being reset and expanded after being subjected to internal water pressure, and the rear section is capable of expelling water to the front section through hydraulic pressure; a water flow channel (700) is arranged in the metal structure shell (14), and a water containing cavity (17) is arranged in the rear section; the outward expansion membrane sleeve (19) is sleeved on the outer wall of the front section, and the edge of the outward expansion membrane sleeve (19) is sealed with the outer wall of the front section; when the water pressure on the inner membrane surface of the outward expansion membrane sleeve (19) is greater than a certain amount, a water-filled variable space is formed between the inner membrane surface of the outward expansion membrane sleeve (19) and the outer wall of the front section, and the two ends of the water flow channel (700) are respectively connected with the water containing cavity (17) and the water-filled variable space; when the water pressure on the inner membrane surface of the outward expansion membrane sleeve (19) is not greater than another certain amount, a gap is formed between the inner membrane surface of the outward expansion membrane sleeve (19) and the outer wall of the front section; the oil-sealed hydraulic push rod mechanism (16) is arranged in the rear section and located at the rear side of the water containing cavity (17); the oil-sealed hydraulic push rod mechanism (16) is used for changing the volume of the water containing cavity (17) through the hydraulic push rod (162) of the oil-sealed hydraulic push rod mechanism (16), so as to change the volume of the water-filled variable space, characterized in that, The expansion amount verification system comprises: A first hydraulic pump (11) is arranged outside the metal structure shell (14); the first hydraulic pump (11) controls the action of the hydraulic push rod (162) of the oil seal hydraulic push rod mechanism (16) through an oil outlet pipeline (13) and an oil return pipeline (500); An oil outlet pipeline pressure gauge (12) is used for detecting the oil outlet pressure of the oil outlet pipeline (13); An oil return pipeline pressure gauge (800) is used for detecting the oil return pressure of the oil return pipeline (500); A displacement sensor (15) is arranged in the rear section and is used for detecting the displacement change amount of the hydraulic push rod (162) of the oil seal hydraulic push rod mechanism (16) and outputting the displacement change amount signal in real time; A calibration liquid cavity shell (18) is in a tub shape; one end of the calibration liquid cavity shell (18) is cross-sectionally opened, the front section is embedded into the calibration liquid cavity shell (18) from the opening of the calibration liquid cavity shell (18), a second enamel disc (400) is arranged around the opening of the calibration liquid cavity shell (18), and the outer wall of the rear section is sleeved with a first enamel disc (300); the calibration liquid cavity shell (18) and the front section form a measurement water body sealed chamber (900) through the sealed installation of the second enamel disc (400) and the first enamel disc (300); the outer membrane surface of the outward expansion membrane sleeve (19) is part of the inner side wall of the measurement water body sealed chamber (900), when the outward expansion membrane sleeve (19) expands outward, the volume of the water-filled variable space becomes larger, and the volume of the measurement water body sealed chamber (900) becomes smaller; A drain pipe (200) is connected to the outside at one end and is connected to the measurement water body sealed chamber (900) at the other end, and is used for draining the measurement water when the volume of the measurement water body sealed chamber (900) becomes smaller; A hydraulic sensor (1000) is used for detecting the hydraulic pressure of the oil outlet pipeline (13) and outputting the hydraulic detection signal in real time; A signal input device (600) is in communication connection with the hydraulic sensor (1000) and the displacement sensor (15).

2. The system for calibrating the expansion of a borehole dilatometer according to claim 1, wherein, The side wall of the drain pipe (200) is further provided with a gas exhaust branch pipe (2001).

3. The borehole expansion cell volume verification system of claim 2, wherein, The side wall of the gas exhaust branch pipe (2001) is further provided with a water injection branch pipe (2002).

4. The system for calibrating the expansion of a borehole dilatometer according to claim 1, wherein, The other end of the calibration liquid cavity shell (18) is sealed by a sealing end cover, and the drain pipe (200) is sealed through the sealing end cover and is connected to the measurement water body sealed chamber (900).

5. The system for calibrating the amount of expansion of a borehole expansion gauge according to claim 1, wherein The expansion amount verification system of the borehole expansion gauge further comprises an electronic scale; The electronic scale is in communication connection with the signal input device (600), and is used for weighing the measurement water flowing out of the measurement water body sealed chamber (900) through the drain pipe (200).

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