System and method for measuring deformation of hydraulic support in high-pressure environment

Abstract

The invention relates to a deformation measurement system and method for a hydraulic support in a high-pressure environment. The deformation measurement system comprises a hydraulic support test bed, a supercharging device, a pressure-bearing cushion block, a deformation extension plate, a displacement detection device and a remote control end. The hydraulic support to be tested is arranged in the hydraulic support test bed; the deformation extension plate is used for extending a deformation point position of the to-be-detected hydraulic support in a high-pressure environment to be in contact with a laser point of the displacement detection device; the pressure-bearing cushion block is used for concentrating the pressure of the to-be-tested hydraulic support to a to-be-tested stress position; the displacement detection device is used for detecting the displacement from the displacement detection device to the deformation extension plate; the supercharging device is connected with the to-be-detected hydraulic support stand column, and the supercharging device and the displacement detection device are in communication connection with the remote control end. The technical problems that in the prior art, when deformation measurement is carried out in the high-pressure test environment of the hydraulic support, manual measurement with the high danger degree needs to be carried out, the obtained data size is small, and the reliability of an analysis result is low are solved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic support testing and detection, and in particular to a deformation measurement system and a measurement method for a hydraulic support under a high-pressure environment. Background Art

[0002] As a structural device for controlling and supporting the mine pressure of the coal mining face, the hydraulic support plays a key role in the comprehensive mechanized mining of modern coal mines. It can support the upper platform, isolate the goaf, push the conveyor, and prevent the gangue from entering the working face, thereby ensuring the safety of miners and improving production efficiency. In order to scientifically estimate the safety and reliability of the hydraulic support in actual use or verify the theoretical analysis, the experimenters often measure and analyze the deformation of the hydraulic support under different pressure conditions through experiments, analyze the safety, load-bearing capacity and other performance of the hydraulic support through real data, and estimate the weak links in the design, and further adjust and improve the support structure, material selection and manufacturing process.

[0003] However, in the process of measuring and analyzing the deformation of hydraulic supports under different pressure conditions in the prior art, since the main deformation position of the hydraulic support is unclear and the stress concentration point of the hydraulic support is easily compressed and covered by the upper platform or the lower platform of the hydraulic support test bench, in order to ensure the reliability of the data, the experimenter is often required to approach and perform manual measurement. When detecting the overall deformation of the hydraulic support under a high-pressure environment, since the deformation is detected under a high-pressure environment, the hydraulic support used in the experiment has a higher risk of collapse (the rated working pressure of an ordinary hydraulic support generally does not exceed 30MPa, but the hydraulic pressure under a high-pressure environment may reach 1.5 times or more of the rated working pressure). It is extremely dangerous for the staff to enter the site to manually measure the deformation, and they often only conduct a small number of tests or tests with relatively low pressure, resulting in a small amount of data and low reliability of the analysis results. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a deformation measurement system and method for a hydraulic support under a high-pressure environment, which solves the technical problems in the prior art that when measuring the deformation of a hydraulic support under a high-pressure environment, manual measurement with a high degree of danger is required, the amount of data obtained is small, and the reliability of the analysis results is low.

[0006] (II) Technical solution

[0007] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0008] In a first aspect, the present invention provides a deformation measurement system for a hydraulic support under a high-pressure environment, comprising a hydraulic support test bench, a pressure-boosting device, a pressure-bearing pad, a deformation extension plate, a displacement detection device, and a remote control terminal; the hydraulic support to be tested is arranged between an upper platform and a lower platform of the hydraulic support test bench, and the distance between the upper platform and the lower platform is adjustable;

[0009] The deformation extension plate is used to convert the deformation point displacement of the hydraulic support to be tested under high pressure environment into the displacement of the deformation extension plate; the deformation extension plate is arranged at the position to be tested of the hydraulic support to be tested, and at least one end of the deformation extension plate extends out of the hydraulic support to be tested;

[0010] The pressure pad is used to concentrate the pressure of the hydraulic support to be tested to the position of the pressure pad; the pressure pad is arranged at least one of the top end of the top beam or the bottom end of the base of the hydraulic support to be tested; the thickness of the pressure pad is greater than the thickness of the deformation extension plate;

[0011] The displacement detection device is used to detect the displacement of the deformed extension plate; the booster device is connected to the hydraulic support to be tested, and is used to provide a high-pressure environment for the hydraulic support to be tested; the hydraulic support to be tested, the booster device and the displacement detection device are respectively connected to the remote control end for communication; the remote control end controls the booster device to form a high-pressure environment in the hydraulic support to be tested, and monitors the displacement of the deformed extension plate in real time through the displacement detection device.

[0012] According to a preferred embodiment of the present invention, one end of the deformation extension plate is arranged at a position to be tested on the top of the hydraulic support to be tested, and the other end of the deformation extension plate extends out of the top of the hydraulic support to be tested.

[0013] According to a preferred embodiment of the present invention, the displacement detection device is a real-time laser distance measuring device; the displacement detection device is arranged just below one end of the displacement extension plate extending out of the hydraulic support to be tested, and detects the distance between the displacement detection device and the displacement extension plate.

[0014] According to a preferred embodiment of the present invention, the deformable extension plate includes a supporting portion and an extending portion, wherein the extending portion is connected to the upper half of the supporting portion, the supporting portion is placed at the position to be tested of the hydraulic support to be tested, and the extending portion is suspended and extends out of the hydraulic support to be tested.

[0015] According to a preferred embodiment of the present invention, the pressure pad is made of metal; the hardness and compressive strength of the metal material used in the pressure pad are greater than or equal to the hardness and compressive strength of the metal material used at the top or bottom of the hydraulic support to be tested.

[0016] According to a preferred embodiment of the present invention, the booster device is connected to the hydraulic column in the hydraulic support to be tested; the booster device can make the hydraulic pressure in the hydraulic column reach 12 times its rated working pressure; the booster device is also provided with a pressure sensor;

[0017] The remote control end includes a hydraulic control module and a real-time monitoring module; the booster device and the hydraulic device in the hydraulic support are respectively connected to the hydraulic control module in communication; the pressure sensor and the displacement detection device are respectively connected to the real-time monitoring module in communication.

[0018] In a second aspect, the present invention provides a method for measuring a deformation measurement system of a hydraulic support under a high pressure environment as described in any one of the first aspects, characterized in that it comprises:

[0019] S1: Adjust the hydraulic support test bench to the predetermined test height;

[0020] S2: Setting the pressure pad to a predetermined position; setting the deformation extension plate to the deformation test position of the hydraulic support to be tested, with at least one end of the deformation extension plate extending out of the hydraulic support to be tested;

[0021] S3: Adjust the height of the hydraulic support to be tested so that the top of the hydraulic support to be tested is kept horizontal and the pressure-bearing pad provided on the top of the hydraulic support to be tested is in contact with the upper platform of the hydraulic support test bench;

[0022] S4: using a displacement detection device to record the current position of the portion of the deformation extension plate extending out of the hydraulic support to be tested;

[0023] S5: adjusting the hydraulic pressure in the hydraulic support to be tested to different predetermined test pressure values, recording the displacement value of the deformation extension plate after the test pressure changes, and obtaining the deformation amount of the hydraulic support to be tested under different pressure conditions.

[0024] According to a preferred embodiment of the present invention, in step S3, the hydraulic pressure range of the hydraulic support to be tested is 0.12-1.12 times the rated working pressure of the hydraulic support.

[0025] According to a preferred embodiment of the present invention, in step S4, the position of the displacement detection device is adjusted so that the position of the portion of the deformed extension plate extending out of the hydraulic support to be tested and close to the hydraulic support to be tested is recorded.

[0026] According to a preferred embodiment of the present invention, in step S5, the predetermined experimental pressure value includes a high pressure value and a low pressure value, the high pressure value is not less than 1.12 times the rated working pressure of the hydraulic support to be tested, and the low pressure value is not more than 0.12 times the rated working pressure of the hydraulic support to be tested; after adjusting the value of the predetermined experimental hydraulic pressure to the high pressure value, it is necessary to wait for the hydraulic pressure to stabilize for 1-5 minutes before recording the displacement value of the deformation extension plate.

[0027] (III) Beneficial effects

[0028] The beneficial effects of the present invention are as follows: a deformation measurement system for a hydraulic support under a high-pressure environment of the present invention adopts a deformation extension plate in cooperation with a displacement detection device and a remote control end. After the deformation extension plate is set to the position to be measured, the deformation amount of the hydraulic support at the position to be measured can be obtained by measuring the displacement of the deformation extension plate, and the deformation data can be recorded through the remote control end. Compared with the prior art, the measurement process under a high-pressure environment does not require manual approach measurement, and has higher safety; and more accurate and reliable analysis results can be obtained by simultaneously setting multiple groups of deformation extension plates and displacement detection devices or by obtaining more groups of data through multiple measurements; at the same time, the present invention also sets a pressure-bearing pad, sets a pressure-bearing pad at at least one of the top or bottom ends of the hydraulic support to be measured, and uses the pressure-bearing pad to concentrate the stress of the hydraulic support to be measured to a specific area. Compared with the prior art, the pressure-bearing pad can The method simulates the uneven stress that the hydraulic support may be subjected to under a high-pressure environment during actual use, aggravates the deformation of the hydraulic support to be tested, and improves the authenticity of the deformation data obtained; in addition, the pressure-bearing pad arranged at the top or bottom of the hydraulic support to be tested can also separate the hydraulic support to be tested from the upper platform or the lower platform of the hydraulic support test bench by a certain distance, which is convenient for the installation and fixation of the deformation extension plate, so that the deformation extension plate of the present invention can be arranged at a deeper position at the top or bottom of the hydraulic support to be tested, thereby increasing the richness of the data points obtained and further improving the reliability of the analysis results; the present invention also utilizes a remote control terminal to record the displacement of the deformation extension plate while real-time monitoring and regulating the test pressure in the hydraulic support to be tested, so as to obtain the deformation of the hydraulic support to be tested under different test pressures, enrich the data gradient of the deformation data obtained, and obtain a more accurate deformation law of the hydraulic support. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the deformation measurement system of the hydraulic support under high pressure environment of the present invention;

[0030] Figure 2 This is a schematic diagram of the arrangement position of the deformation extension plate of the deformation measurement system of the hydraulic support under high pressure environment of the present invention:

[0031] Figure 3 This is a schematic diagram of the arrangement positions of the pressure pad and the deformation extension plate of the deformation measurement system of the hydraulic support under high pressure environment of Example 1 of the present invention.

[0032] Figure 4 It is a schematic structural diagram of the support part and the extension part of the deformation measurement system of the hydraulic support under high pressure environment of the present invention.

[0033] [Description of Reference Numerals]

[0034] 1: Hydraulic support test bench; 2: Pressurizing device; 3: Pressure pad; 4: Deformation extension plate; 5: Displacement detection device; 6: Remote control terminal; 7: Hydraulic support to be tested; 8: Support part; 9: Pressure sensor; 10: Hydraulic control module; 11: Real-time monitoring module; 12: Emulsion pump station; 13: Extension part. DETAILED DESCRIPTION

[0035] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below with reference to the accompanying drawings and through specific embodiments. Figure 1 The orientation is used as a reference.

[0036] Embodiment 1:

[0037] The present invention provides a deformation measurement system for a hydraulic support under high pressure environment, such as Figure 1 As shown, it includes a hydraulic support test bench 1, a booster device 2, a pressure pad 3, a deformation extension plate 4, a displacement detection device 5 and a remote control terminal 6.

[0038] like Figure 1 As shown, the hydraulic support 7 to be tested is arranged between the upper platform and the lower platform of the hydraulic support test bench 1, and the distance between the upper platform and the lower platform is adjustable.

[0039] Among them, the hydraulic support test bench 1 is a rectangular or cube-shaped structure, including an upper platform, a column and a lower platform, and the hydraulic support 7 to be tested is arranged on the lower platform; the height of the upper platform of the hydraulic support test bench 1 can be adjusted, which is convenient for testing different working heights of the hydraulic support 7 to be tested.

[0040] The deformation extension plate 4 is used to convert the deformation of the hydraulic support 7 to be tested under high pressure into the displacement of the deformation extension plate 4; the deformation extension plate 4 is arranged at the tested position of the hydraulic support 7 to be tested, and at least one end of the deformation extension plate 4 extends out of the hydraulic support 7 to be tested.

[0041] Among them, the deformation extension plate 4 is used to extend the deformation of the deformation point position of the hydraulic support 7 to be tested under a high-pressure environment, so as to facilitate measurement using the displacement detection device 5; the deformation extension plate 4 can be a metal plate, a plastic plate, a ceramic plate, a stone plate or a wooden plate, but it should be noted that the deformation extension plate 4 must be a hard plate with low elasticity, and the part of the deformation extension plate 4 extending out of the hydraulic support 7 to be tested cannot be too long, so as to prevent the suspended part of the deformation extension plate 4 extending out of the hydraulic support 7 to be tested from vibrating violently during the measurement process, thereby affecting the displacement measurement.

[0042] like Figure 2As shown, preferably, the deformable extension plate 4 is a metal plate; the deformable extension plate 4 is overlapped to the position to be tested of the hydraulic support 7 to be tested or is fixedly connected to the position to be tested of the hydraulic support 7 to be tested, and the fixing method includes but is not limited to spot welding, bonding and the like; it should be noted that a fixed connection method that is easy to release, will not cause significant damage to the hydraulic support 7 to be tested, and will not produce a large gap between the connection part of the deformable extension plate 4 and the position to be tested of the hydraulic support 7 to be tested is required, so as to facilitate the removal of the deformable extension plate 4 and its position when necessary, thereby ensuring its test accuracy; and, according to the purpose of measurement and the different measurement points, the deformable extension plate 4 is not limited to being fixed to the position to be tested in a parallel manner, and it can be fixed to the position to be tested at various angles, such as being fixed to the position to be tested at a certain tilt angle, and two displacement detection devices 5 are simultaneously arranged in its vertical direction and horizontal direction, and the vertical displacement and horizontal displacement of the deformable extension plate 4 are detected at the same time.

[0043] like Figure 1 As shown, the pressure-bearing pad 3 is used to concentrate the pressure on the top beam or the pressure on the base of the hydraulic support 7 to be tested to the position where the pressure-bearing pad 3 is located (i.e., the force position to be tested determined according to the test requirements and standards); the pressure-bearing pad 3 is arranged at at least one end of the top end of the top beam or the bottom end of the base of the hydraulic support 7 to be tested.

[0044] Among them, the pressure-bearing pad 3 is a metal pad, a ceramic pad or a composite material pad. The pressure-bearing pad 3 is used to simulate the actual use environment (changing the position of the pressure-bearing pad 3 can simulate different working conditions). The uneven force that the hydraulic support 7 to be tested may be subjected to under a high-pressure environment aggravates the deformation of the hydraulic support 7 to be tested, making its stress more concentrated and the strain more obvious, thereby improving the authenticity of the obtained deformation data.

[0045] Preferably, the pressure pad 3 is a metal pad made of metal material; the hardness and compressive strength of the metal material used in the pressure pad 3 are greater than or equal to the hardness and compressive strength of the metal material used at the top or bottom of the hydraulic support 7 to be tested.

[0046] It should be additionally explained that, under a high-pressure environment, the pressure concentration point of the hydraulic support is not necessarily the deformation concentration point (generally, the deformation concentration point is also the stress concentration point), and it needs to be analyzed according to the specific situation. The present invention can test and verify the deformation concentration point by setting multiple deformation extension plates. It can collect enough real deformation data to analyze the deformation concentration point, and can be compared and verified with computer simulation experimental results or other theoretical calculation results.

[0047] The thickness of the pressure pad 3 is greater than the thickness of the deformation extension plate 4, and its thickness is generally not less than 100 mm or can ensure that the top beam of the hydraulic support does not contact the upper platform of the hydraulic support test bench 1 during the test.

[0048] When the deformation extension plate 4 is arranged at the top or bottom of the hydraulic support 7 to be tested, it is prevented from contacting the upper platform or the lower platform of the hydraulic support test bench 1, thus affecting the measurement result.

[0049] The displacement detection device 5 is used to detect the displacement of the portion of the deformation extension plate 4 extending out of the hydraulic support 7 to be tested.

[0050] The displacement detection device 5 is a laser distance measuring device or a linear sensor measuring device.

[0051] like Figure 1 As shown, the booster device 2 is connected to the hydraulic support 7 to be tested, and is used to provide a high-pressure environment for the hydraulic support 7 to be tested.

[0052] Among them, after the boosting device 2 is connected to the hydraulic support 7 to be tested, the hydraulic chamber of the boosting device 2 will be connected to the column hydraulic chamber in the hydraulic support 7 to be tested, that is, the test pressure in the hydraulic support 7 to be tested can be determined by measuring the pressure in the boosting device 2.

[0053] like Figure 1 As shown, the hydraulic support 7 to be tested, the booster device 2 and the displacement detection device 5 are respectively connected to the remote control terminal 6 for communication.

[0054] Among them, the operation of the hydraulic support 7 to be tested is controlled by the remote control terminal 6 to facilitate adjustment of its height or control of its movement; the high-pressure environment that the hydraulic support 7 to be tested cannot reach itself is provided by controlling the booster device 2; and the deformation data is obtained by controlling the displacement detection device 5.

[0055] The remote control terminal 6 controls the pressure-boosting device 2 to form a high-pressure environment in the hydraulic support 7 to be tested, and monitors the displacement of the deformed extension plate 4 in real time through the displacement detection device 5 .

[0056] Preferably, one end of the deformation extension plate 4 is arranged at the position to be tested on the top of the hydraulic support 7 to be tested, and the other end of the deformation extension plate 4 extends out of the top of the hydraulic support 7 to be tested. The deformation extension plate 4 is arranged on the top of the hydraulic support 7 to be tested, and the overall deformation of the hydraulic support 7 to be tested is studied. At the same time, the length of the deformation extension plate 4 is controlled to reduce the influence of the non-detection position of the hydraulic support 7 to be tested on the measurement result.

[0057] Preferably, the displacement detection device 5 is a real-time laser distance measuring device; the displacement detection device 5 is arranged just below one end of the displacement extension plate extending out of the hydraulic support 7 to be measured, and detects the distance between the displacement detection device 5 and the displacement extension plate. The laser distance meter has high measurement accuracy, and its position is flexible and adjustable, which is convenient for changing the measurement position.

[0058] It should be noted that the specific position and number of the displacement detection device 5 are determined according to the actual measurement point conditions, and it is not necessarily a fixed device fixed at a certain point.

[0059] Preferably, the pressure pad 3 is arranged at the top and / or bottom of the hydraulic support 7 to be tested at the stress position to be tested which is set according to the test standard requirements.

[0060] Preferably, the booster device 2 is connected to the hydraulic column in the hydraulic support 7 to be tested; the booster device 2 can make the hydraulic pressure in the hydraulic column reach 1-2 times of its rated working pressure; the booster device 2 is also provided with a hydraulic sensor.

[0061] More preferably, the booster device 2 can make the hydraulic pressure in the hydraulic column 7 reach 1-1.5 times of its rated working pressure.

[0062] like Figure 1 As shown, preferably, the remote control terminal 6 includes a hydraulic control module 10 and a real-time monitoring module 11; the booster device 2 and the hydraulic device in the hydraulic support are respectively communicated with the hydraulic control module 10, and their hydraulic sizes are controlled by the hydraulic control module 10; the pressure sensor 9 and the displacement detection device 5 are respectively communicated with the real-time monitoring module 11, and the test pressure size and the displacement of the deformation extension plate 4 are monitored and recorded by the real-time monitoring module 11.

[0063] like Figure 1 As shown, preferably, the boosting device 2 also includes an emulsion pump station 12; the emulsion pump station 12 is communicatively connected to the hydraulic control module 10; the emulsion pump station 12 also has the ability to monitor the hydraulic pressure in real time, and its data can be compared with the data of the pressure sensor 9.

[0064] The present invention also provides a method for measuring a deformation measurement system of a hydraulic support under a high pressure environment, comprising:

[0065] S1: Adjust the hydraulic support test bench 1 to a predetermined test height.

[0066] S2: Setting the pressure pad 3 to a predetermined position (stress position to be tested) of the hydraulic support 7 to be tested; setting the deformation extension plate 4 to the position to be tested of the hydraulic support 7 to be tested, with at least one end of the deformation extension plate 4 extending out of the hydraulic support 7 to be tested.

[0067] S3: Adjust the height of the hydraulic support 7 to be tested, so that the top of the hydraulic support 7 to be tested or the pressure-bearing pad 3 provided on the top of the hydraulic support 7 to be tested abuts against the upper platform of the hydraulic support test bench 1.

[0068] S4: Use the displacement detection device 5 to record the current position of the portion of the deformed extension plate 4 extending out of the hydraulic support 7 to be tested.

[0069] S5: adjusting the hydraulic pressure in the hydraulic support 7 to be tested to different predetermined test pressure values, recording the displacement value of the deformation extension plate 4 after the hydraulic pressure changes, and obtaining the deformation amount of the hydraulic support 7 to be tested under different test pressure conditions.

[0070] The method further includes a preparation step: placing the hydraulic support 7 to be tested in the hydraulic support test bench 1 .

[0071] Preferably, it also includes step S6: repeating steps S2-S5, adjusting the positions of the pressure pad 3 and the deformation extension plate 4 and the predetermined experimental pressure value; setting different experimental conditions (the position of the pressure pad 3 and the predetermined experimental pressure value) to detect the deformation of different positions of the hydraulic support to be tested.

[0072] Preferably, in step S2, when the pressure pad 3 is set to the force-bearing position to be tested of the hydraulic support 7 to be tested, in order to ensure the balance of the hydraulic support 7 to be tested, the pressure pad 3 must be placed strictly in accordance with the specified position in the test standard to ensure the overall stability of the hydraulic support 7 to be tested.

[0073] More preferably, in this embodiment, the ZY14790 / 15 / 25D shielded hydraulic support is tested, and its rated working pressure (the maximum hydraulic pressure that can be reached by the hydraulic system in the hydraulic support to ensure safe operation during normal operation) is 45 MPa.

[0074] More preferably, if Figure 3 As shown, in this embodiment, a deformable extension plate 4 is provided in the middle of the top of the hydraulic support 7 to be tested; a pressure pad 3 is provided on the left and right sides of the top of the hydraulic support 7 to be tested; and two pressure pads 3 are provided on the left and right sides of the bottom of the hydraulic support 7 to be tested.

[0075] Preferably, in step S3, the hydraulic pressure range of the hydraulic support 7 to be tested is 0.12-1.12 times of the rated working pressure of the hydraulic support.

[0076] More preferably, in this embodiment, the hydraulic pressure in the hydraulic support 7 to be tested is not less than 31.5 MPa to prevent it from affecting the subsequent hydraulic adjustment.

[0077] Preferably, in step S4, the position of the displacement detection device 5 is adjusted so that the position of the portion of the deformed extension plate 4 extending out of the hydraulic support 7 to be tested, which is close to the hydraulic support 7 to be tested, is recorded. If a real-time laser detection device is used, it is necessary to set the laser irradiation point as close as possible to the portion of the deformed extension plate 4 extending out of the hydraulic support 7 to be tested, which is close to the hydraulic support 7 to be tested, so as to improve its detection accuracy.

[0078] Preferably, in step S5, the predetermined test pressure value includes a low pressure value and a high pressure value, the high pressure value is not less than 50MPa, and the low pressure value is not more than 10MPa; after adjusting the value of the predetermined experimental hydraulic pressure to the high pressure value, it is necessary to wait for the hydraulic pressure to stabilize for 1-5 minutes before recording the displacement value of the deformation extension plate 4; the low pressure value is less than the hydraulic pressure value in the hydraulic support 7 to be tested in step S3.

[0079] More preferably, in this embodiment, the low pressure value is 5.6 MPa, and the high pressure value is 52.1 MPa.

[0080] Among them, when adjusting the predetermined test pressure value, first adjust it to the high pressure value, and after recording the data, adjust it to the low pressure value. This is a single complete test cycle; taking the position parameters of the deformed extension plate 4 under the low pressure value as a control, the position parameters of the deformed extension plate 4 under the high pressure value (L1) are subtracted from the position parameters of the deformed extension plate 4 under the low pressure value (L2), and the displacement value of the deformed extension plate 4 can be obtained; wherein, L1 is the average value of the position parameters of the deformed extension plate 4 measured within 1-4 minutes after the value of the predetermined test pressure is adjusted to the high pressure value and stabilized for 1-8 minutes; L2 is the average value of the position parameters of the deformed extension plate 4 measured within 1-4 minutes after the value of the predetermined test pressure is adjusted to the low pressure value.

[0081] More preferably, in this embodiment, L1 is the average value of the position parameters of the deformation extension plate 4 measured within 3 minutes after the value of the predetermined test pressure is adjusted to the high pressure value and stabilized for 5 minutes; L2 is the average value of the position parameters of the deformation extension plate 4 measured within 3 minutes after the value of the predetermined test pressure is adjusted to the low pressure value.

[0082] Preferably, the displacement value of the deformable extension plate 4 includes a vertical displacement value and a horizontal displacement value.

[0083] More preferably, in this embodiment, the displacement value of the deformed extension plate 4 is a vertical displacement value.

[0084] The data measured in this embodiment are shown in Table 1-2 below, and the deformation amount is 0.046m (4.6cm).

[0085] Table 1 Position (height) parameters of the deformation extension plate 4 under high pressure (52.1 MPa)

[0086]

[0087] Table 2 Position (height) parameters of deformation extension plate 4 at low pressure (5.6 MPa)

[0088] Pressure time 1min 2min 3min L2 Position parameter (m) 1.938 1.938 1.938 1.938

[0089] Embodiment 2:

[0090] This embodiment provides a hydraulic support deformation measurement system under high pressure environment and its measurement system, which is different from the embodiment 1 in that, in this embodiment, Figure 4 As shown, the deformable extension plate includes a support portion 8 and an extension portion 13, wherein the extension portion 13 is connected to the upper half of the support portion 8, the support portion 8 is placed on the to-be-tested position of the to-be-tested hydraulic support 7, and the extension portion 13 is suspended and extends out of the to-be-tested hydraulic support 7. The support portion 8 is provided to separate the extension portion 13 in the deformable extension plate 4 from the to-be-tested hydraulic support 7, thereby further reducing the influence of the non-tested position of the to-be-tested hydraulic support 7 on the measurement result.

[0091] In summary, a deformation measurement system for a hydraulic support under a high-pressure environment of the present invention adopts a deformation extension plate 4 in cooperation with a displacement detection device 5 and a remote control terminal 6. After the deformation extension plate 4 is set to the position to be measured, the deformation amount of the hydraulic support 7 to be measured at the position to be measured can be obtained by measuring the displacement of the deformation extension plate 4, and the deformation data can be recorded through the remote control terminal 6. Compared with the prior art, the measurement process under a high-pressure environment does not require manual approach measurement, and the safety is higher; and more groups of data can be obtained by simultaneously setting multiple groups of deformation extension plates 4 and displacement detection devices 5 or by multiple measurements, so as to obtain more accurate and reliable analysis results; and, the present invention also sets a pressure pad 3, sets a pressure pad 3 at at least one end of the top or bottom end of the hydraulic support 7 to be measured, and uses the pressure pad 3 to concentrate the stress of the hydraulic support 7 to be measured to a specific area. Compared with the prior art, the pressure pad 3 can simulate the actual In actual use, the hydraulic support may be subjected to uneven force under high-pressure environment, which aggravates the deformation of the hydraulic support 7 to be tested and improves the authenticity of the deformation data obtained; in addition, the pressure-bearing pad 3 arranged at the top or bottom of the hydraulic support 7 to be tested can also separate the hydraulic support 7 to be tested from the upper platform or lower platform of the hydraulic support test bench 1 by a certain distance, which is convenient for the installation and fixation of the deformation extension plate 4, so that the deformation extension plate 4 of the present invention can be set to a deeper position at the top or bottom of the hydraulic support 7 to be tested, thereby increasing the richness of the data points obtained and further improving the reliability of the analysis results; in addition, the present invention also uses the remote control terminal 6 to record the displacement of the deformation extension plate 4 while real-time monitoring and regulation of the hydraulic stress in the hydraulic support 7 to be tested, so as to obtain the deformation of the hydraulic support 7 to be tested under different hydraulic pressure conditions, enrich the data gradient of the deformation data obtained, and obtain a more accurate deformation law of the hydraulic support.

[0092] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0093] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0094] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0095] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0096] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A deformation measurement system for a hydraulic support under high pressure environment, characterized in that: The invention comprises a hydraulic support test bench (1), a pressure boosting device (2), a pressure bearing pad (3), a deformation extension plate (4), a displacement detection device (5) and a remote control terminal (6); the hydraulic support to be tested (7) is arranged between an upper platform and a lower platform of the hydraulic support test bench (1), and the distance between the upper platform and the lower platform is adjustable; The deformable extension plate (4) is used to convert the deformation point displacement of the hydraulic support (7) to be tested under a high-pressure environment into the displacement of the deformable extension plate (4); the deformable extension plate (4) is arranged at the position to be tested of the hydraulic support (7) to be tested, and at least one end of the deformable extension plate (4) extends out of the hydraulic support (7) to be tested; The pressure-bearing pad (3) is used to concentrate the pressure of the hydraulic support (7) to be tested to the position where the pressure-bearing pad is located; the pressure-bearing pad (3) is arranged at least one of the top end of the top beam or the bottom end of the base of the hydraulic support (7) to be tested; the thickness of the pressure-bearing pad (3) is greater than the thickness of the deformation extension plate (4); The displacement detection device (5) is used to detect the displacement of the deformable extension plate (4); the booster device (2) is connected to the hydraulic support to be tested (7) and is used to provide a high-pressure environment for the hydraulic support to be tested (7); the hydraulic support to be tested (7), the booster device (2) and the displacement detection device (5) are respectively connected to the remote control end (6) for communication; the remote control end (6) controls the booster device (2) to form a high-pressure environment in the hydraulic support to be tested (7), and monitors the displacement of the deformable extension plate (4) in real time through the displacement detection device (5).

2. The deformation measurement system of the hydraulic support under high pressure environment as claimed in claim 1 is characterized in that: One end of the deformable extension plate (4) is arranged at a position to be tested on the top of the hydraulic support (7) to be tested, and the other end of the deformable extension plate (4) extends out of the top of the hydraulic support (7) to be tested.

3. The deformation measurement system of the hydraulic support under high pressure environment as claimed in claim 2 is characterized in that: The displacement detection device (5) is a real-time laser distance measuring device; the displacement detection device (5) is arranged directly below one end of the displacement extension plate extending out of the hydraulic support (7) to be tested, and detects the distance between the displacement detection device (5) and the displacement extension plate.

4. The deformation measurement system of a hydraulic support under high pressure environment as claimed in claim 1, characterized in that: The deformable extension plate comprises a support portion (8) and an extension portion (13), wherein the extension portion (13) is connected to the upper half of the support portion (8), the support portion (8) is placed at a position to be tested of a hydraulic support (7) to be tested, and the extension portion (13) is suspended in the air and extends out of the hydraulic support (7) to be tested.

5. The deformation measurement system of a hydraulic support under high pressure environment as claimed in claim 1, characterized in that: The pressure-bearing pad (3) is made of metal; the hardness and compressive strength of the metal material used in the pressure-bearing pad (3) are greater than or equal to the hardness and compressive strength of the metal material used in the top end or the bottom end of the hydraulic support (7) to be tested.

6. The deformation measurement system of a hydraulic support under high pressure environment as claimed in claim 1, characterized in that: The boosting device (2) is connected to the hydraulic column in the hydraulic support (7) to be tested; the boosting device (2) can make the hydraulic pressure in the hydraulic column reach 1-2 times its rated working pressure; the boosting device (2) is also provided with a pressure sensor (9); The remote control terminal (6) comprises a hydraulic control module (10) and a real-time monitoring module (11); the booster device (2) and the hydraulic device in the hydraulic support are respectively connected to the hydraulic control module (10); and the pressure sensor (9) and the displacement detection device (5) are respectively connected to the real-time monitoring module (11).

7. The method for measuring deformation of a hydraulic support under high pressure environment according to any one of claims 1 to 6, characterized in that: include: S1: adjusting the hydraulic support test bench (1) to a predetermined test height; S2: setting the pressure pad (3) to a predetermined position; setting the deformation extension plate (4) to the deformation test position of the hydraulic support (7) to be tested, with at least one end of the deformation extension plate (4) extending out of the hydraulic support (7) to be tested; S3: adjusting the height of the hydraulic support (7) to be tested so that the top of the hydraulic support (7) to be tested is kept horizontal and the pressure-bearing pad (3) provided at the top of the hydraulic support (7) to be tested is in contact with the upper platform of the hydraulic support test bench (1); S4: using the displacement detection device (5) to record the current position of the portion of the deformed extension plate (4) extending out of the hydraulic support (7) to be tested; S5: adjusting the hydraulic pressure in the hydraulic support (7) to be tested to different predetermined test pressure values, recording the displacement value of the deformation extension plate (4) after the test pressure is changed, and obtaining the deformation amount of the hydraulic support (7) to be tested under different pressure conditions.

8. The method for measuring deformation of a hydraulic support under high pressure environment according to claim 7, characterized in that: In step S3, the hydraulic pressure range of the hydraulic support (7) to be tested is 0.12-1.12 times the rated working pressure of the hydraulic support.

9. The method for measuring deformation of a hydraulic support under high pressure environment according to claim 7, characterized in that: In step S4, the position of the displacement detection device (5) is adjusted so that the position of the portion of the deformed extension plate (4) extending out of the hydraulic support (7) to be tested and close to the hydraulic support (7) to be tested is recorded.

10. The method for measuring deformation of a hydraulic support under high pressure environment according to claim 7, characterized in that: In step S5, the predetermined experimental pressure value includes a high pressure value and a low pressure value, the high pressure value is not less than 1.12 times the rated working pressure of the hydraulic support (7) to be tested, and the low pressure value is not more than 0.12 times the rated working pressure of the hydraulic support (7) to be tested; after adjusting the value of the predetermined experimental hydraulic pressure to the high pressure value, it is necessary to wait for the hydraulic pressure to stabilize for 1-5 minutes before recording the displacement value of the deformed extension plate (4).

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