Test system for checking vertical rigidity calculated value of mine ballast bed and roadway bottom plate
By designing a test system including a left flat beam, a left displacement sensor, a cylinder, a pressure sensor, and a programmable logic controller (PLC), data is automatically collected and processed, solving the problem of accurate calculation of the vertical stiffness of the mine roadbed and tunnel floor, improving measurement efficiency and accuracy, and ensuring the accuracy of the dynamic response characteristics analysis of narrow-gauge vehicles and mine track structures.
Patent Information
- Application Number
- CN202423047186.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-11
AI Technical Summary
In the existing technology, the calculated vertical stiffness of the mine roadbed and tunnel floor mainly relies on experience, resulting in a large difference between the calculated results and the actual situation, affecting the dynamic response characteristics of narrow-gauge vehicles and mine track structures.
A test system was designed, including a left flat beam, a left displacement sensor, a cylinder, a pressure sensor, a cambered pad, a programmable logic controller (PLC), etc. By automatically collecting and processing data, efficient and high-precision calibration of the vertical stiffness of the mine roadbed and tunnel floor can be achieved.
It achieves efficient and high-precision vertical stiffness measurement, solves the problems of low efficiency and low precision caused by relying on manual data collection, and ensures the accuracy and reliability of the measurement results.
Smart Images
Figure CN223461808U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of coal mine auxiliary transportation, concretely relates to the test system of the vertical rigidity calculation value of the mine shaft bed and the roadway floor. BACKGROUND
[0002] The mine track is composed of a steel rail, a fastener, a sleeper, a track bed and a roadway floor, the track bed is laid on the roadway floor, the sleeper is located on the track bed, the steel rail is located on the sleeper, and the steel rail and the sleeper are connected through the fastener. Under the action of load, the track bed and the roadway floor will deform. The vertical rigidity of the track bed and the roadway floor refers to the ratio of the pressure on the surface of the track bed of the mine track to the vertical displacement thereof, includes the influence of the physical properties and the mechanical properties of the track bed and the roadway floor on force and displacement, and characterizes the anti-deformation capacity of the track bed and the roadway floor.
[0003] The vertical rigidity of the track bed and the roadway floor directly affects the dynamic response characteristics of the narrow-gauge vehicle and the mine track structure, and is a key parameter of the narrow-gauge vehicle-mine track coupled dynamic system. Since the surrounding rock conditions of the mine are complex, the parameter is currently mainly determined according to experience, and the taken vertical rigidity value often has a large difference from the actual situation. SUMMARY
[0004] Therefore, the utility model provides a test system for checking the vertical rigidity calculation value of the mine track bed and the roadway floor, which is mainly used for checking the calculation result of the vertical rigidity of the mine track bed and the roadway floor, and the test result is accurate and the test process is simple and reliable.
[0005] The technical scheme of the utility model is a test system for checking the vertical rigidity calculation value of the mine track bed and the roadway floor, which comprises a left flat beam, a left displacement sensor, a cylinder body, a pressure sensor, an arc surface pad, a piston, a first valve, a second valve, a hand pump, a third valve, a fourth valve, an oil tank, a right flat beam, a right displacement sensor, a pad plate, a programmable logic controller PLC, a power supply and a computer.
[0006] The first valve and the second valve are connected in parallel on the upper end of the cylinder body of the hydraulic prop, the third valve and the fourth valve are connected in parallel on the lower end of the cylinder body, the second valve and the third valve are simultaneously connected with the hand pump, the first valve and the fourth valve are simultaneously connected with the oil tank, and the hand pump is also simultaneously connected with the oil tank; the pressure sensor is arranged on the other side of the cylinder body of the hydraulic prop; and the arc surface pad is sleeved on the top of the piston of the hydraulic prop.
[0007] During the checking, the cushion plate is placed in the middle of the sleeper from which the fastener is removed, one end of the left flat beam and the right flat beam is fixed on the sidewall of the roadway near the selected measuring position respectively, the left displacement sensor and the right displacement sensor are installed on the extended end of the left flat beam and the right flat beam respectively; the cylinder of the hydraulic prop is placed in the middle of the cushion plate, the arc surface pad is sleeved on the top of the piston of the hydraulic prop, the manual pump is driven, when the piston is lifted, the arc surface pad contacts with the roof of the roadway, the floor of the roadway is deformed under pressure, the collected data of the pressure sensor, the left displacement sensor and the right displacement sensor are transmitted to the computer through the programmable logic controller (PLC), and relevant calculation and verification are completed.
[0008] Further, the positive and negative poles of the power supply are connected with the L and M poles of the CPU module of the programmable logic controller (PLC) respectively, and the programmable logic controller (PLC) is powered.
[0009] Further, the L and M poles of the left displacement sensor are connected with the positive and negative poles of the power supply respectively, and the positive and negative poles of the signal output end of the left displacement sensor are connected with the 0+ port and the 0- port of the analog module of the programmable logic controller (PLC) respectively.
[0010] Further, the L and M poles of the right displacement sensor are connected with the positive and negative poles of the power supply respectively, and the positive and negative poles of the signal output end of the right displacement sensor are connected with the 1+ port and the 1- port of the analog module of the programmable logic controller (PLC) respectively.
[0011] Further, the positive pole of the pressure sensor is connected with the positive pole of the power supply, the negative pole of the pressure sensor is connected with the 2+ port of the analog module of the programmable logic controller (PLC), and the 2- port of the analog module of the programmable logic controller (PLC) is connected with the negative pole of the power supply.
[0012] The utility model discloses the beneficial effects are:
[0013] The test system can realize automatic acquisition and processing of test data, effectively avoids the problems of low measurement efficiency and insufficient precision caused by the dependence of the traditional coal mine auxiliary transportation field test system on manual acquisition and processing of measurement data, and can efficiently and accurately obtain relevant measurement results. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is test system schematic diagram;
[0015] Figure 2 It is data acquisition principle diagram in test system;
[0016] Figure 3 It is the connection schematic diagram of each sensor, PLC and computer in test system;
[0017] Figure 4 It is mine track structure schematic diagram;
[0018] Explanation of reference numerals: roadway floor 1, track bed 2, sleeper 3, steel rail 4, left flat beam 5, left displacement sensor 6, cylinder body 7, pressure sensor 8, cambered pad 9, piston 10, first valve 11, second valve 12, hand pump 13, third valve 14, fourth valve 15, oil tank 16, right flat beam 17, right displacement sensor 18, pad 19, fastener 20, programmable logic controller PLC 21, power supply 22, computer 23. DETAILED DESCRIPTION
[0019] In order to verify the calculated vertical stiffness value, the corresponding test system in the utility model is as shown in Figure 1 The principle of collecting measurement data is as shown in Figure 2 All elements and components in the test system meet the coal mine explosion-proof requirements.
[0020] Before measurement, a proper measurement position is selected in the roadway, the fastener 20 between the corresponding sleeper 3 and the steel rail 4 at the measurement position is removed, the pad 19 is placed in the middle of the sleeper 3 from which the fastener is removed, one end of the left flat beam 5 and the right flat beam 17 is respectively fixed on the side wall of the roadway near the selected measurement position, the left displacement sensor 6 (model HG-C1200) and the right displacement sensor 18 (model HG-C1200) are respectively installed at the extended end of the left flat beam 5 and the right flat beam 17, the left displacement sensor 6 (model HG-C1200) and the right displacement sensor 18 (model HG-C1200) are adjusted to ensure that the probes thereof are opposite to the surface of the pad 19 and the distance between the left displacement sensor 6 (model HG-C1200), the right displacement sensor 18 (model HG-C1200) and the pad 19 is less than 200 mm, the cylinder body 7 of the hydraulic prop is placed in the middle of the pad 19, the cambered pad 9 is sleeved on the top of the piston 10 of the hydraulic prop, the hand pump 13 (model PL201) is driven, when the piston 10 is lifted, the cambered pad 9 contacts the roadway roof.
[0021] As shown in Figure 3 The positive and negative poles of the 24V power supply 22 are respectively connected with the L and M poles of the CPU module (model SIEMENS200Smart T40) of the programmable logic controller PLC 21 to supply power for the programmable logic controller PLC 21.
[0022] The L and M poles of the left displacement sensor 6 (model HG-C1200) are respectively connected with the positive and negative poles of the 24V power supply 22. The positive and negative poles of the signal output end of the left displacement sensor 6 (model HG-C1200) are respectively connected with the 0+ port and the 0- port of the analog module (model EM AM06) of the programmable logic controller PLC 21.
[0023] The L and M poles of the right displacement sensor 18 (model HG-C1200) are connected to the positive and negative poles of the 24V power supply 22 respectively. The positive and negative poles of the signal output end of the right displacement sensor 18 (model HG-C1200) are connected to the 1+ port and 1- port of the analog module (model EM AM06) of the programmable logic controller PLC 21 respectively.
[0024] The positive pole of the pressure sensor 8 (model MIK-P310) is connected to the positive pole of the 24V power supply 22, and the negative pole of the pressure sensor 8 (model MIK-P310) is connected to the 2+ port of the analog module (model EM AM06) of the programmable logic controller PLC 21. The 2- port of the analog module (model EM AM06) of the programmable logic controller PLC 21 is connected to the negative pole of the 24V power supply 22.
[0025] During the measurement, the second valve 12 (model XYF-QFT1-SK) and the fourth valve 15 (model XYF-QFT1-SK) are closed, the first valve 11 (model XYF-QFT1-SK) and the third valve 14 (model XYF-QFT1-SK) are opened, the manual pump 13 (model PL201) is steadily driven, the hydraulic prop piston 10 is gradually lifted, the programmable logic controller PLC 21 receives signals from various sensors, when the pressure sensor 8 (model MIK-P310) shows that the pressure is about 1 MPa, the hydraulic prop has pressed the cambered block 9 and the pad 19 tightly, the track bed 2 and the roadway floor 1 have a certain deformation, the manual pump 13 (model PL201) is continuously steadily driven, the pressure value of the pressure sensor 8 (model MIK-P310) increases accordingly, the stress of the track bed 2 and the roadway floor 1 and the deformation thereof increase accordingly, when the pressure value of the pressure sensor 8 (model MIK-P310) increases by about 0.5 MPa on the basis of the original value, the driving of the manual pump 13 (model PL201) is paused, after the pressure value of the pressure sensor 8 (model MIK-P310) is stable, the current measurement data of the pressure sensor 8 (model MIK-P310), the left displacement sensor 6 (model HG-C1200) and the right displacement sensor 18 (model HG-C1200) are recorded by the computer 23; then, the manual pump 13 (model PL201) is continuously steadily driven, when the pressure value of the pressure sensor 8 (model MIK-P310) increases by about 0.5 MPa again, the driving of the manual pump 13 (model PL201) is paused again, after the pressure value of the pressure sensor 8 (model MIK-P310) is stable, the measurement data of the pressure sensor 8 (model MIK-P310), the left displacement sensor 6 (model HG-C1200) and the right displacement sensor 18 (model HG-C1200) are recorded by the computer 23 again, the process is repeated until the pressure value of the pressure sensor 8 (model MIK-P310) is about 4 MPa, and six groups of pressure and displacement values are recorded. When the pressure value of the pressure sensor 8 (model MIK-P310) reaches 4 MPa and the last data recording is completed, the first valve 11 (model XYF-QFT1-SK) and the third valve 14 (model XYF-QFT1-SK) are closed, the second valve 12 (model XYF-QFT1-SK) and the fourth valve 15 (model XYF-QFT1-SK) are opened, the manual pump 13 (model PL201) is driven, the piston 10 of the hydraulic prop is gradually retracted into the cylinder body 7, and the experiment is completed.
[0026] According to the actual working condition, the sleeper used in the mine track is a concrete sleeper, the stiffness thereof is large, and the influence on the measurement can be ignored. The formula for calculating the vertical stiffness of the track bed and the roadway floor by using the measurement data is
[0027]
[0028] Where, P j is the jth measurement value of the pressure sensor, in Pa; d is the inner diameter of the hydraulic support cylinder, in m; d lj d rj They are Figure 1 The j-th measurement value of the left displacement sensor 6 and the right displacement sensor 18.
Claims
1. A test system for verifying calculated values of vertical stiffness of a mine shaft bed with respect to a roadway floor, characterised in that, The test system comprises a left flat beam (5), a left displacement sensor (6), a cylinder (7), a pressure sensor (8), a cambered block (9), a piston (10), a first valve (11), a second valve (12), a hand pump (13), a third valve (14), a fourth valve (15), an oil tank (16), a right flat beam (17), a right displacement sensor (18), a backing plate (19), a programmable logic controller (21), a power supply (22) and a computer (23); wherein the programmable logic controller (21) is composed of a CPU module and an analog module; The first valve (11) and the second valve (12) are connected in parallel on the upper end of the cylinder (7) of the hydraulic prop, and the third valve (14) and the fourth valve (15) are connected in parallel on the lower end of the cylinder (7); the second valve (12) and the third valve (14) are connected with the hand pump (13) simultaneously, the first valve (11) and the fourth valve (15) are connected with the oil tank (16) simultaneously, and the hand pump (13) is also connected with the oil tank (16) simultaneously; the pressure sensor (8) is arranged on the other side of the cylinder (7) of the hydraulic prop; and the cambered block (9) is sleeved on the top of the piston (10) of the hydraulic prop.
2. The test system for verifying the calculated value of the vertical stiffness of the mine shaft bed with respect to the roadway floor according to claim 1, characterized in that, The positive and negative poles of the power supply (22) are connected with the L and M poles of the CPU module of the programmable logic controller (21) respectively, so as to supply power for the programmable logic controller (21).
3. The test system for verifying the calculated value of the vertical stiffness of the mine shaft bed with respect to the roadway floor according to claim 1, characterized in that, The L and M poles of the left displacement sensor (6) are connected with the positive and negative poles of the power supply (22) respectively, and the positive and negative poles of the signal output end of the left displacement sensor (6) are connected with the 0+ port and the 0- port of the analog module of the programmable logic controller (21) respectively.
4. The test system for verifying the calculated value of the vertical stiffness of the mine shaft bed with respect to the roadway floor according to claim 1, characterized in that, The L and M poles of the right displacement sensor (18) are connected with the positive and negative poles of the power supply (22) respectively, and the positive and negative poles of the signal output end of the right displacement sensor (18) are connected with the 1+ port and the 1- port of the analog module of the programmable logic controller (21) respectively.
5. The test system for verifying the calculated value of the vertical stiffness of the mine shaft bed with respect to the roadway floor according to claim 1, characterized in that, The positive pole of the pressure sensor (8) is connected with the positive pole of the power supply (22), the negative pole of the pressure sensor (8) is connected with the 2+ port of the analog module of the programmable logic controller (21), and the 2- port of the analog module of the programmable logic controller (21) is connected with the negative pole of the power supply (22).