CN210513919U - High-water-pressure split type rock mass deformation measuring device - Google Patents
High-water-pressure split type rock mass deformation measuring device Download PDFInfo
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- CN210513919U CN210513919U CN201921019772.4U CN201921019772U CN210513919U CN 210513919 U CN210513919 U CN 210513919U CN 201921019772 U CN201921019772 U CN 201921019772U CN 210513919 U CN210513919 U CN 210513919U
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Abstract
The utility model relates to a high water pressure split type rock mass deformation measuring device, which adopts the LVDT sensor principle to carry out split type and high water pressure prevention design, and the main components comprise a metal measuring rod, a magnetic iron core, a shell, a waterproof coil framework, a coil, a tail attachment, a wire clamp, a cable, a signal processing bin and the like; the main electronic components are processed by adopting an all-metal shell and vacuum particle sealing double-layer sealing process, and have the water pressure resistance of more than 5 MPa; the measurement signal has the characteristics of centralized processing, digitization and signal dual utilization, namely, after the data of a plurality of sensors are centralized in one electronic bin, the digitized signal is connected with an independent reading instrument outside the bin or a centralized acquisition device for field experiments. The utility model discloses a traditional manual record is to digital data transmission, look over in real time and the upgrading of gathering is updated, has high water pressure resistant, anti-interference, precision height, is fit for advantages such as experimental global requirement, dynamic response are fast and long service life.
Description
Technical Field
The utility model belongs to the technical field of on-the-spot rock mass mechanics experiments, a rock mass field test's rock mass deformation measuring device under high water pressure environment and construction method and application thereof are related to.
Background
In the rock mass field test, the deformation strength parameters of the rock mass are obtained by preparing the test sample on the field and carrying out the loading test, and because the test is a large-size in-situ test, the test result plays an important role in engineering design. The rock mass field test is generally carried out in a waterless exploration horizontal tunnel, and the rock mass deformation measurement in the test mainly adopts dial indicators for manual reading or a grating type sensor computer for automatic acquisition.
In recent years, a plurality of high dam reservoirs are designed and built in western water conservancy and hydropower engineering in China, the maximum dam height exceeds 300m, the mechanical properties of large-size fractured rock masses under the action of high water pressure and seepage need to be researched urgently, and field experimental data has important significance for safe operation of dam foundation rock masses and reservoir bank slope rock masses. Therefore, a fractured rock mass mechanics field test technology under a high-pressure water environment is proposed, wherein a rock mass deformation measurement technology is intensively researched.
The novel rock mass mechanics field test technology test environment is a closed narrow space of a high-pressure water environment, the installation position of a sensor is small, rock mass deformation measurement cannot be manually reset after a test bin is closed, and test results need high-precision deformation data. In addition, the novel test technology has the overall requirements of digitization and centralized automatic acquisition. Therefore, the measuring device requires the conditions of a wide range (20cm), high precision (μm level), easy digitization, high water pressure resistance, small measuring parts, high reliability, and the like.
Disclosure of Invention
The utility model provides an adopt LVDT sensor to be high water pressure resistant, split type rock mass deformation measuring device of principle and preparation method according to prior art's not enough. The rock mass deformation measuring device can perfectly execute the deformation measuring task of a novel rock mass mechanics field test by utilizing the characteristics of frictionless measurement, high resolution and input/output isolation of the LVDT sensor and through split type design and the sealing design of the assembly.
The utility model aims at providing a high water pressure resistant split type rock mass deformation measuring device with narrow space, high precision and digitization, therefore, the utility model provides a high water pressure resistant split type rock mass deformation measuring device, which comprises a signal processing bin and one or more measuring units, wherein a circuit board is arranged in the signal processing bin, and the one or more measuring units are respectively connected with the circuit board in the signal processing bin through signal output cables; each measuring unit comprises a measuring bracket, a split type measuring rod, a shell, a magnetic iron core, a nonmagnetic coil skeleton and a coil wound on the nonmagnetic coil skeleton, wherein the magnetic iron core is suspended in a central hole of the nonmagnetic coil skeleton, and one end of the magnetic iron core is connected with the measuring rod; the shell is wrapped outside the nonmagnetic coil framework and the coil, the tail end of the shell is provided with a tail accessory and a wire clamp, the coil is sealed in the shell through the tail accessory, and the signal output cable is in signal connection with the coil in the shell through the tail accessory and the wire clamp; the measuring bracket is connected to the housing.
The utility model discloses further technical scheme: when the measuring device is used for performing a rock mass deformation test, a measuring bracket of each measuring unit is fixed at a fixed deformation measuring reference point selected in the rock mass field test process, and one end of a measuring rod, which is not connected with a magnetic iron core, is fixed on the surface of a measuring sample; the measuring rod drives the magnetic iron core to axially move to cut the coil to generate magnetic lines of force and generate voltage difference, then voltage change is mediated and output to a circuit board inside the signal processing bin through a signal output cable, and electric signals of the coil are digitally processed through the circuit board and then output to an external reading instrument or a centralized data acquisition device.
The utility model discloses better technical scheme: the nonmagnetic coil framework is a cylindrical structure made of waterproof nonmagnetic materials, a vertical central hole with an opening at the bottom surface is formed in the middle of the nonmagnetic coil framework, and the coil is wound on the nonmagnetic coil framework, dipped in paint and dried; the shell is made of nonmagnetic stainless steel materials, the edge of the nonmagnetic coil framework and the shell are coated and sealed by adopting a vacuum particle sealing process to form a signal acquisition cavity, and the coil is sealed in the signal acquisition cavity formed between the nonmagnetic coil framework and the shell.
The utility model discloses better technical scheme: the measuring rod is made of nonmagnetic stainless steel materials, and one end of the measuring rod, which is not connected with the magnetic iron core, is provided with threads and a fastening nut.
The utility model discloses better technical scheme: the signal processing bin is made of nonmagnetic stainless steel materials, the circuit board is arranged in the signal processing bin in a sealing mode, and tail accessories and wire clamps used for connecting cables are arranged at two ends of the signal processing bin respectively.
The utility model discloses better technical scheme: the measuring bracket is fixedly arranged on the shell through a clamp.
The utility model discloses better technical scheme: when the rock mass deformation test is carried out, the measuring end of the measuring rod is buried under the surface of the measuring sample and is fixed through a fastening nut.
The invention uses non-magnetic stainless steel (1Cr18Ni9Ti) to make skeleton, the skeleton is blind hole form, then coils are winded on the skeleton, vacuum paint dipping is carried out after the test meets the requirement, and the processing is carried out according to the paint dipping rule. And (3) welding after the process is finished, performing particle beam welding on the shell and the framework in a vacuum environment, and performing a water pressure test after confirming that no problem exists in a welding seam so as to ensure that the waterproof and pressure-resistant performances meet the requirements. After the processes are completed, debugging is carried out, an aging experiment is carried out, then vacuum material sub-beam welding is carried out again, a demodulation circuit is packaged into a shell, then vulcanization treatment is carried out on the waterproof and pressure-resistant cable, finally, the whole water-discharging shielded cavity of the sensor output cable is subjected to 6-7MPa water pressure test, pressure is required to be maintained for more than 2 hours, and pressure is not dropped, so that the requirement of 5MPa is met.
The utility model discloses when carrying out rock mass deformation test, its surface of deformation measurement sample is rock mass sample surface, and its surface smoothness and smooth finish satisfy relevant test regulation requirement.
The utility model adopts the LVDT sensor principle to carry out split type and high water pressure prevention design on the measuring device, and the main components of the measuring device comprise a metal measuring rod, a shell, a waterproof coil framework, a tail accessory, a wire clamp, a cable, a signal processing bin and the like; the main electronic components are processed by adopting an all-metal shell and vacuum particle sealing double-layer sealing process, the double-layer sealing process means that the main electronic components adopt the metal shell and vacuum particle sealing process, all components except the cable are subjected to film coating and sealing by physical and chemical means after main electronic components adopt the metal shell for sealing, and the cable adopts a high-water-pressure-resistant model, so that the integral water resistance of the deformation measuring device is realized, and the reliable water pressure resistance is more than 5 MPa. The coil and a circuit board in the signal processing bin are internal elements of the sensor and are connected through a cable circuit; the magnetic iron core is suspended in a central hole of a sensor coil framework, magnetic lines of force generated by the coil are cut through axial movement, voltage difference is generated, and then voltage change is output through regulation so as to achieve the faithful reaction on the deformation of a measured object; electronic elements such as circuit boards and the like are arranged in the signal processing bin made of nonmagnetic stainless steel materials. The measurement signal has the characteristics of centralized processing, digitization and signal dual utilization, namely, after the data of a plurality of sensors are centralized in one electronic bin, the digitized signal is connected with an independent reading instrument outside the bin or a centralized acquisition device for field experiments.
The utility model discloses a waterproof coil skeleton forms the signal acquisition storehouse with full metal material casing parcel coil, and metal material's casing parcel seals components such as internal coil, and the casing seals the water proof and bears high water pressure, guarantees that internal component normally works in high water pressure environment. The waterproof coil framework and the interface of the all-metal shell are coated and sealed by adopting a vacuum particle sealing process, so that the integral waterproof and wear-resistant performance of the deformation sensor signal acquisition bin is realized; the waterproof coil framework is used for winding a coil to manufacture a magnetic field, and the main body of the waterproof coil framework is cylindrical and forms a sealed space, namely a signal acquisition bin together with the shell to protect circuits such as an internal coil. The tail is attached to, the fastener sets up in the measuring part tail end, carries out waterproof withstand voltage protection to sensor signal output cable conductor.
The iron core and the coil are separated from each other, the non-magnetic waterproof coil framework is inserted between the iron core and the inner wall of the coil, high-pressure water or corrosive water can be isolated from the coil, the measuring rod is not required to be dynamically sealed, and only the sensor coil needs to be hermetically sealed; the iron core and the sensor coil are of a split structure, and no friction is generated, so that the sensor has the advantages of high repeatability, quick dynamic response, long service life and the like; the signal acquisition bin consisting of the waterproof coil framework, the coil and the all-metal material shell is separated from the signal processing bin integrated with the circuit board, so that the sensor installation in a narrow space of the sealed cabin of the field hydraulic coupling test is realized. The split iron core measuring rod designed in the utility model is not affected by water environment, is not in direct contact with the sensor coil and other parts, has one end connected with the iron core, and is arranged in the central hole of the sensor shell during working; the other end is fixed on the surface of the sample to be tested by adopting a nut when working.
The signal processing bin of the utility model is separated from the LVDT measuring component, so that the measuring component can be conveniently installed in a closed narrow space; the inside circuit board that has of signal processing storehouse, this component can insert a plurality of sensor signals centralized processing, and the cable contact outside reading appearance or concentrated data acquisition device after will measuring result is digital, and this part adopts metal casing to add the sealed double-deck sealed form of vacuum particle, can arrange the condition according to the test and place the position of gathering in the farther department. The two ends of the signal processing bin are connected with the cable in a sealing way through the tail and the wire clamp, and the signal transmission cable connector of the sensor can be protected against water and pressure. The signal processing bin performs A/D conversion on the measurement data and outputs the measurement data to the outside, so that the digital upgrading of the measurement data is realized; the digital transmission processing reduces the transmission voltage loss of the analog signal long circuit and improves the measurement precision of the device. The signal dual utilization is characterized in that the outlet cable of the signal processing bin can be connected with a single external reading instrument or a field test centralized acquisition device to provide a matched digital signal.
The utility model discloses break through traditional rock mass field test and can't carry out deformation measurement's limitation under having the water pressure condition, solved the rock mass field test's under the high water pressure condition deformation test problem, realized that the tradition is manual to be recorded digital data transmission, the upgrading of looking over in real time and gathering changes the change, can provide basic data for high dam foundation, wade into water side slope and underground cavern design and stable evaluation to hydraulic coupling deformation strength characteristic research for engineering rock mass provides effective, reliable means under the complex environment.
The utility model discloses break through traditional rock mass field test and can't carry out deformation measurement's limitation under having the water pressure condition, adopt differential transformer formula sensor principle, formed digital, split type high water pressure resistant deformation measuring device, have high water pressure resistant, anti-interference, characteristics such as precision height, resolution ratio height, suitable test global requirement to and repeatability height, dynamic response are fast, advantages such as long service life, can guarantee the accurate true determination rock mass deformation strength parameter index under water.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The device comprises a measuring rod 1, a magnetic iron core 2, a thread and fastening nut 3, a nonmagnetic coil skeleton 4, a shell 5, a coil 6, a tail accessory 7, a wire clamp 8, a circuit board 9, a signal processing bin 10, a signal output cable 11, a deformation measuring datum point 12, a measuring support 13 and a measuring sample 14.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific examples. Embodiments are particularly shown in fig. 1, and thus, the following detailed description of the embodiments of the invention presented in the drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The embodiment provides a split type rock mass of high water pressure deformation measuring device, specifically as shown in fig. 1, measuring device includes signal processing storehouse 10 and a plurality of measuring unit, signal processing storehouse 10 adopts the preparation of nonmagnetic stainless steel material to form, is equipped with circuit board 9 in signal processing storehouse 10, signal processing storehouse 10 is arranged in to circuit board 9 is sealed to be equipped with tail annex and the fastener that is used for connecting the cable respectively at the both ends of signal processing storehouse 10, and signal processing storehouse 10 both ends all carry out the sealing connection of cable through tail and fastener, can carry out waterproof withstand voltage protection to sensor signal transmission cable line interface. The measuring units are respectively connected with the circuit board 9 in the signal processing bin 10 through signal output cables 11.
As shown in fig. 1, each measuring unit includes a measuring bracket 13, a housing 5, a split measuring rod 1, a magnetic core 2, a nonmagnetic coil skeleton 4, and a coil 6 wound on the nonmagnetic coil skeleton 4; the nonmagnetic coil skeleton 4 is a cylindrical structure made of waterproof nonmagnetic materials and used for winding a coil to manufacture a magnetic field, a vertical central hole with an opening at the bottom surface is formed in the middle of the nonmagnetic coil skeleton, and the coil 6 is wound on the nonmagnetic coil skeleton 4 and is subjected to paint dipping and drying; the shell 5 is made of nonmagnetic stainless steel materials, the shell 5 is wrapped outside the nonmagnetic coil framework 4 and the coil 6, the tail end of the shell 5 is provided with a tail accessory 7 and a wire clamp 8, the edge of the nonmagnetic coil framework 4 and the shell 5 are coated and sealed by adopting a vacuum particle sealing process to form a signal acquisition cavity, and the integral waterproofing and wear resistance of the deformation sensor signal acquisition cabin are realized; the coil 6 is sealed in a signal acquisition cavity formed between the nonmagnetic coil skeleton 4 and the shell 5. The signal output end of the coil 6 is in signal connection with a circuit board 9 in a signal processing bin 10 through a signal output cable 11; the measuring stand 13 is fixedly mounted on the housing 5 by means of a clamp. The measuring rod 1 is made of nonmagnetic stainless steel materials, one end of the measuring rod is connected with the magnetic iron core 2 suspended in the center hole of the nonmagnetic coil framework 4, and the other end of the measuring rod is provided with threads and a fastening screw cap 3 which are fixedly connected with the surface of the measuring sample 14.
As shown in fig. 1, when the measuring device of the present invention is used for rock mass deformation test, the measuring bracket 13 of each measuring unit is fixed at the fixed deformation measuring reference point 12 selected in the rock mass field test process, and one end of the measuring rod 1, which is not connected with the magnetic iron core 2, is fixed on the surface of the measuring sample 14; the measuring rod 1 drives the magnetic iron core 2 to axially move to cut the coil 6 to generate magnetic lines of force and generate voltage difference, then the voltage change is regulated and output to a circuit board 9 in the signal processing bin 10 through a signal output cable 11, and electric signals of the coil 6 are digitally processed through the circuit board 9 and then output to an external reading instrument or a centralized data acquisition device so as to achieve the faithful response to the deformation of the measured object. The measuring end of the measuring rod 1 is buried under the surface of the measuring sample 14 and is fixed by a fastening nut. The deformation measurement datum point 12 is a fixed point selected in the rock mass field test process, and the deformation measurement datum point 12 is not deformed in the test process; the surface flatness and finish of the test specimen 14 meet the requirements of the relevant test procedures.
The specific construction process of the measurement device in the example is as follows:
step 1: the waterproof non-magnetic coil framework 4 is manufactured by processing non-magnetic stainless steel (1Cr18Ni9Ti), the coil framework is of a cylindrical structure, a vertical center hole with an opening at the bottom surface is formed in the middle of the coil framework, a coil 6 is wound on the waterproof coil framework, and after the coil is wound, dip coating and drying are carried out;
step 2: sealing the waterproof nonmagnetic coil framework 4 prepared in the step 1 by adopting a shell 5 made of an all-metal material, mounting a tail accessory 7 and a wire clamp 8 at a signal output end of the shell, connecting the signal output end by a cable, then coating and sealing joints of the waterproof nonmagnetic coil framework 4, the shell 5 made of the all-metal material, the tail accessory 7 and the wire clamp 8 by adopting a vacuum particle sealing process, testing a water pressure of a signal transmission cable connector after confirming that no problem exists in a welding seam, ensuring that the waterproof pressure resistance meets the requirement, debugging the cable connector, and performing an aging test to realize the integral waterproof and wear-resistant performance of the sensor;
and step 3: manufacturing a demodulation circuit board 9, placing the circuit board in a signal processing bin 10 made of nonmagnetic stainless steel (1Cr18Ni9Ti), packaging the demodulation circuit board 9 in a shell of the signal processing bin 10 by adopting a vacuum particle sealing process, installing cable tail accessories and wire clamps at two ends of the signal processing bin, and respectively extending signal output cables 11 at two ends of the demodulation circuit board 9 from the cable tail accessories and the wire clamps at two ends of the signal processing bin;
and 4, step 4: placing the signal output cable 11 and the waterproof non-magnetic coil framework 4 in the step (3) on the tail accessory 7 and the signal output end of the wire clamp 8 to be connected with a cable;
and 5: vulcanizing the signal output cable 11, and carrying out 6-7MPa water pressure test on the integral water discharge shielding cavity of the sensor output cable, wherein the pressure is not dropped for more than 2 hours to meet the requirement of 5 MPa;
step 6: the independent measuring rod 1 is made of non-magnetic stainless steel (1Cr18Ni9Ti), and one end of the measuring rod 1 is connected with the magnetic iron core 2;
and 7: one end of an iron core of the split type metal measuring rod is arranged in a vertical central hole of a sensor coil framework, and a measuring unit main body is connected with a measuring support 13;
and 8: the linearity and precision of the manufactured measuring device are calibrated, the water pressure resistance performance is tested, and the performance test requirements are as follows: the displacement measurement range is 20mm, the linearity is less than 0.05%, the test resolution is 0.001mm, the water pressure resistance is 5MPa, the input working power supply is +/-12 VDC (provided by a data acquisition instrument), and a rated displacement output signal: 5VDC, 5 meters of pressure-resistant waterproof shielding cable.
When the high water pressure resistant split type deformation measuring device is used specifically: the method comprises the following steps that one non-magnetic stainless steel end of a split type metal measuring rod 1, namely a measuring rod sample end 3, is buried in the surface 14 of a rock mass sample, one end of a magnetic iron core 2 is arranged in a central hole of a non-magnetic coil framework 4 of a measuring unit, and a measuring unit main body is fixed on a rock mass field test measuring bracket 13; the loading control system for the rock mass field hydraulic coupling test is started to carry out the high water pressure resistant rock mass field test, the magnetic force lines generated by the coil 6 are cut through the axial movement of the split type iron core measuring rod 1, a voltage difference is generated, the magnetic force lines are output through the cable 11 after being measured by the signal processing bin 10, and the voltage difference is recorded by computer software after being regulated, so that the faithful response to the deformation of the measured object is achieved.
The utility model provides a when high water pressure resistant split type deformation measuring device specifically uses: the method comprises the following steps that one non-magnetic stainless steel end of a split type metal measuring rod 1, namely a measuring rod sample end 3, is buried in the surface 14 of a rock mass sample, one end of a magnetic iron core 2 is arranged in a central hole of a non-magnetic coil framework 4 of a measuring unit, and a measuring unit main body is fixed on a rock mass field test measuring bracket 13; the loading control system for the rock mass field hydraulic coupling test is started to carry out the high water pressure resistant rock mass field test, the magnetic force lines generated by the coil 6 are cut through the axial movement of the split type iron core measuring rod 1, a voltage difference is generated, the magnetic force lines are output through the cable 11 after being measured by the signal processing bin 10, and the voltage difference is recorded by computer software after being regulated, so that the faithful response to the deformation of the measured object is achieved.
The magnetic iron core 2 and the coil 6 of the utility model are separated from each other, and the non-magnetic waterproof framework is inserted between the inner walls of the magnetic iron core 2 and the coil 6, so that high-pressure water or corrosive water can be isolated from the coil group, the split measuring rod of the motion component is not required to be dynamically sealed, and the sensor coil is only required to be hermetically sealed; the magnetic iron core 2 and the measuring unit main body are of a split structure, and friction is not generated, so that the magnetic measuring unit has the advantages of high repeatability, quick dynamic response, long service life and the like; a signal acquisition bin consisting of a waterproof nonmagnetic coil framework 4, a coil 6 and an all-metal material shell 5 is separated from a signal processing bin 10 integrated with a circuit board, so that the installation of a sensor in a narrow space of a sealed cabin of a field hydraulic coupling test is realized; the utility model discloses wholly can bear outer high water pressure.
The above description is only one embodiment of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (7)
1. The utility model provides a split type rock mass of high water pressure warp measuring device which characterized in that: the measuring device comprises a signal processing bin (10) and one or more measuring units, wherein a circuit board (9) is arranged in the signal processing bin (10), and the one or more measuring units are respectively in signal connection with the circuit board (9) in the signal processing bin (10) through signal output cables (11); each measuring unit comprises a measuring bracket (13), a shell (5), a split type measuring rod (1), a magnetic iron core (2), a nonmagnetic coil framework (4) and a coil (6) wound on the nonmagnetic coil framework (4), wherein the magnetic iron core (2) is suspended in a central hole of the nonmagnetic coil framework (4), and one end of the magnetic iron core is connected with the measuring rod (1); the shell (5) is wrapped outside the nonmagnetic coil framework (4) and the coil (6), a tail accessory (7) and a wire clamp (8) are arranged at the tail end of the shell (5), the coil (6) is sealed in the shell (5) through the tail accessory (7), and the signal output cable (11) is in signal connection with the coil (6) in the shell (5) through the tail accessory (7) and the wire clamp (8); the measuring bracket (13) is connected to the housing (5).
2. The split type rock mass deformation measuring device of claim 1, characterized in that: when the measuring device is used for performing a rock mass deformation test, a measuring bracket (13) of each measuring unit is fixed at a fixed deformation measuring datum point (12) selected in the rock mass field test process, and one end of a measuring rod (1) which is not connected with a magnetic iron core (2) is fixed on the surface of a measuring sample (14); the measuring rod (1) drives the magnetic iron core (2) to axially move to cut the coil (6) to generate magnetic lines of force and generate voltage difference, then voltage change is mediated and output to a circuit board (9) inside the signal processing bin (10) through a signal output cable (11), and electric signals of the coil (6) are output to an external reading instrument or a centralized data acquisition device after being digitally processed through the circuit board (9).
3. The split type rock mass deformation measuring device of claim 1 or 2, characterized in that: the nonmagnetic coil framework (4) is of a cylindrical structure made of nonmagnetic stainless steel, a vertical central hole with an opening at the bottom is formed in the middle of the nonmagnetic coil framework, and the coil (6) is wound on the nonmagnetic coil framework (4) and is subjected to paint dipping and drying; the shell (5) is made of nonmagnetic stainless steel materials, the edge of the nonmagnetic coil framework (4) and the shell (5) are coated and sealed by adopting a vacuum particle sealing process to form a signal acquisition cavity, and the coil (6) is sealed in the signal acquisition cavity formed between the nonmagnetic coil framework (4) and the shell (5).
4. The split type rock mass deformation measuring device of claim 1 or 2, characterized in that: the measuring rod (1) is made of non-magnetic stainless steel materials, and one end of the measuring rod, which is not connected with the magnetic iron core (2), is provided with threads and a fastening nut (3).
5. The split type rock mass deformation measuring device of claim 1 or 2, characterized in that: the signal processing bin (10) is made of nonmagnetic stainless steel materials, the circuit board (9) is arranged in the signal processing bin (10) in a sealing mode, and tail accessories and wire clamps used for connecting cables are arranged at two ends of the signal processing bin (10) respectively.
6. The split type rock mass deformation measuring device of claim 1 or 2, characterized in that: the measuring bracket (13) is fixedly arranged on the shell (5) through a clamp.
7. The split type rock mass deformation measuring device of claim 2, characterized in that: when a rock mass deformation test is carried out, the measuring end of the measuring rod (1) is buried under the surface of a measuring sample (14) and is fixed through a fastening nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921019772.4U CN210513919U (en) | 2019-07-03 | 2019-07-03 | High-water-pressure split type rock mass deformation measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921019772.4U CN210513919U (en) | 2019-07-03 | 2019-07-03 | High-water-pressure split type rock mass deformation measuring device |
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| CN210513919U true CN210513919U (en) | 2020-05-12 |
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| CN201921019772.4U Expired - Fee Related CN210513919U (en) | 2019-07-03 | 2019-07-03 | High-water-pressure split type rock mass deformation measuring device |
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| CN (1) | CN210513919U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186754A (en) * | 2019-07-03 | 2019-08-30 | 长江水利委员会长江科学院 | A kind of split type rock mass deformation measuring device of high hydraulic pressure and its construction method and application |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186754A (en) * | 2019-07-03 | 2019-08-30 | 长江水利委员会长江科学院 | A kind of split type rock mass deformation measuring device of high hydraulic pressure and its construction method and application |
| CN110186754B (en) * | 2019-07-03 | 2024-02-23 | 长江水利委员会长江科学院 | High-water-pressure split rock deformation measuring device, construction method and application thereof |
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