CN112378761B - Data detection test bed for railway steel rail and use method thereof - Google Patents
Data detection test bed for railway steel rail and use method thereof Download PDFInfo
- Publication number
- CN112378761B CN112378761B CN202011062314.6A CN202011062314A CN112378761B CN 112378761 B CN112378761 B CN 112378761B CN 202011062314 A CN202011062314 A CN 202011062314A CN 112378761 B CN112378761 B CN 112378761B
- Authority
- CN
- China
- Prior art keywords
- steel rail
- rod
- fixed
- groups
- fixedly connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 153
- 239000010959 steel Substances 0.000 title claims abstract description 153
- 238000012360 testing method Methods 0.000 title claims abstract description 41
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005452 bending Methods 0.000 claims description 14
- 238000002474 experimental method Methods 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 6
- 238000004080 punching Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
- G01N2203/0647—Image analysis
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a railway steel rail data detection test bed and a use method thereof, wherein two ends of a steel rail are fixed in a fixed seat, the middle part of the steel rail is fixed through a clamping assembly, a tension meter is connected between a stamping rod and a clamping assembly, a tension test is carried out through a hydraulic press to test the hardness of the steel rail, one end of the steel rail is fixed in the fixed seat, the other end of the steel rail is clamped in the clamping assembly, the steel rail is repeatedly stamped through the hydraulic press, the toughness of the steel rail is tested, the deformation quantity of the steel rail is identified through an image identification technology, the service life of the steel rail is predicted and analyzed through a gray prediction algorithm, the steel rail can be replaced before the steel rail breaks down, the occurrence of faults is prevented in advance, and the running safety of a train is improved.
Description
Technical Field
The invention relates to the field of railway steel rail detection, in particular to a railway steel rail data detection test bed and a use method thereof.
Background
The roadbed is a foundation of a railway track or a road pavement, is a structure for bearing and transmitting the gravity of the track and the dynamic action of a train, is an important structure for ensuring the running of the train, and has enough strength and stability, so that sleepers are required to be installed on the roadbed during laying, and then steel rails of the railway are fixed on the sleepers to form a track for running of wheels of the train.
Therefore, the quality of the rail is critical to railway operation safety, the performance test is required to be carried out on the rail before the rail is paved so as to meet train operation conditions, fatigue damage is the most important damage form for railway rail damage, the fatigue life of the railway rail is tested so as to ensure that the railway rail cannot break and crack during use, the main test method is to detect the bending resistance and the compression resistance of the railway, and then standard rail test data is referred to judge whether the used railway rail meets the standard or not so as to avoid serious accidental casualties in the use process. The prior art mainly adopts artificial mode to detect, lacks relevant check out test set.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a railway steel rail data detection test stand and a using method thereof, wherein the upper surface of a device table is fixedly connected with a support frame, the top end of the support frame is fixedly connected with a hydraulic press, the output end of the hydraulic press is connected with a stamping rod, the bottom end of the stamping rod is in threaded connection with a clamping assembly, the upper surface of the device table is in sliding connection with a fixing seat, the side surface of the fixing seat is fixedly connected with a sliding rod, the other end of the sliding rod extends to the side surface of the device table, the side surface of the support frame is movably clamped with a tension meter, the middle part of a steel rail is fixed through the clamping assembly and is connected between the stamping rod and the clamping assembly, tension test is performed through the hydraulic press to test the hardness of the steel rail, one end of the steel rail is fixed inside the fixing seat, the other end of the steel rail is clamped in the clamping assembly, then repeated stamping is performed through the hydraulic press, the steel rail is bent for a plurality of times, the toughness of the steel rail is tested, the service life of the selected steel rail is predicted, the steel rail can be replaced in advance before faults occur, and the running safety of a train is improved.
In order to achieve the above purpose, the invention provides a data detection test stand for railway steel rail and a use method thereof, which are realized as follows:
the utility model provides a be used for railway rail data detection test bench, includes the equipment platform, the upper surface fixedly connected with support frame of equipment platform, the top fixedly connected with hydraulic press of support frame, the output of hydraulic press runs through the support frame and downwardly extending fixedly connected with stamping rod, stamping rod's bottom threaded connection has the centre gripping subassembly, the spout has been seted up to the upper surface of equipment platform and the below that is located the support frame, the inside sliding connection of spout has the fixing base, the side fixedly connected with slide bar of fixing base, the one end that the slide bar kept away from the fixing base extends to the side of equipment platform to both sides, the side activity joint of support frame has the tension meter;
the clamping assembly comprises a fixed plate, a first thread sleeve, a clamping plate, a forward thread rod, a reverse thread rod, a rotating head and a sliding block, wherein the first thread sleeve is fixedly connected to the upper surface of the fixed plate, a moving groove is formed in the lower surface of the fixed plate, the forward thread rod is rotationally connected to the inside of the moving groove, one end of the forward thread rod is fixedly connected with the reverse thread rod, the other end of the forward thread rod extends to the outer side surface of the fixed plate and is fixedly connected with the rotating head, the upper surface of the clamping plate is fixedly connected with the sliding block, the sliding block is in the moving groove, the two groups of sliding blocks are respectively in threaded connection with the outer surfaces of the forward thread rod and the reverse thread rod, the direction of the thread grooves of the outer surfaces of the forward thread rod and the reverse thread rod is opposite, one end bearing of the reverse thread rod is far away from the inner part of the fixed plate, and when the side surface of the fixed plate is rotated, the forward thread rod and the reverse thread rod are simultaneously rotated in the same direction, the two groups of clamping plates are simultaneously rotated on the two sides of the lower surface of the fixed plate, and then the hydraulic press is started to move the hydraulic press, one end of the hydraulic press is moved down, then the two groups of the clamping plate is turned down, and then the clamping assembly is turned to the two groups of the outer surfaces of the clamping plate are opposite to rotate, and the outer surfaces of the clamping assembly is located on the two sides and opposite sides.
The top fixedly connected with second screw sleeve of pull gauge, the bottom output fixedly connected with connecting screw rod of pull gauge, the external screw thread has been seted up to the bottom surface of punching press pole, first screw sleeve and second screw sleeve all with the external screw thread looks adaptation of punching press pole bottom, connecting screw rod and first screw sleeve looks adaptation, fixedly connected with blend stop on the inside wall of support frame, the bottom of punching press pole runs through the upper surface of blend stop and downwardly extending, the bottom surface fixedly connected with press strip of hydraulic press, the upper surface of blend stop just is located the fixedly connected with under the press strip presses the counter, carries out the experiment of buckling repeatedly at the output of punching press pole reciprocates, and when the output of hydraulic press stretches out completely, the press strip of the output surface of hydraulic press just contacts with the upper surface of pressing the counter, presses the counter once, presses the counter to show and presses once this moment, and when the output of hydraulic press contracts this moment, the tip that drives the rail upwards moves, presses the counter not counts, consequently presses the counter to show quantity and is equal to actual the number of times and then buckles and just half, and does not observe the rail condition in the course of buckling.
The high-definition camera is arranged on the inner side of the supporting frame and used for recognizing deformation of a detected steel rail, the tablet personal computer, the 5G module and the analog quantity collector are arranged on one side above the equipment table, the analog quantity collector is used for receiving information collected by the tension meter and the compression counter, the analog quantity collector is converted into digital signals and transmitted to the tablet personal computer, the high-definition camera is used for transmitting collected image information to the tablet personal computer, image recognition is carried out in the tablet personal computer, deformation of the detected steel rail is recognized, hardness and toughness of the steel rail are calculated in the tablet personal computer, life prediction is carried out on the steel rail according to a calculated result, the 5G module is controlled to transmit the calculated result to the server, the service life of the used steel rail can be inquired through accessing the server, a relevant department is informed of replacing the steel rail before the steel rail breaks down, and driving and navigation is protected for train safe operation.
The fixed slot is formed in the middle of the upper surface of the fixed seat, the fixed block is movably clamped in the fixed slot, a fixed hole is formed in the side face of the fixed block, the inserting rod is movably inserted into the side face of the fixed seat, the end portion of the inserting rod penetrates through the fixed hole and is movably inserted into the inner side wall of the fixed slot, the movable block is fixedly connected with the lower surface of the fixed seat, one end of the sliding rod is fixedly connected to the side face of the movable block, the other end of the sliding rod extends to the outer side wall of the equipment table, a connecting strip is fixedly connected with an adjusting screw in the middle of the side face, one end of the adjusting screw penetrates through the connecting strip and is connected to the outer side wall of the equipment table in a rotating mode, the adjusting screw is rotated on the side face of the equipment table, the connecting strip moves on the outer surface of the adjusting screw, the connecting strip drives two groups of fixing seats to slide along the sliding chute through the sliding rod, the two groups of the fixing seats move from the middle to the two sides, one group of fixing seats is equal to the length of the steel rail, the other end of the steel rail is placed in the side face of the fixed slot, the steel rail is placed in the fixed slot, and then the steel rail is placed in the fixed slot, and the end of the steel rail is placed in the fixed slot, and the steel rail is fixed in the inside the fixed slot, and the fixed slot is fixed in the steel rail is placed in the inside the fixed slot, and the steel rail is fixed in the steel rail.
The invention adopts the hydraulic press to carry out bending test on the railway steel rail, thereby the following beneficial effects can be obtained:
1. according to the invention, the two ends of the steel rail are fixed in the fixed seat, the middle part of the steel rail is fixed through the clamping assembly, the tension meter is connected between the stamping rod and the clamping assembly, the hardness of the steel rail is tested through the tension test of the hydraulic machine, one end of the steel rail is fixed in the fixed seat, the other end of the steel rail is clamped in the clamping assembly, and then the steel rail is repeatedly stamped through the hydraulic machine, so that the toughness of the steel rail is tested.
2. According to the invention, the rotating head is rotated on the side surface of the fixed plate, so that the forward rotation threaded rod and the reverse rotation threaded rod simultaneously rotate in the same direction, at the moment, the two groups of clamping plates move to two sides on the lower surface of the fixed plate, then the hydraulic press is started, the hydraulic press is enabled to move downwards for a certain distance, then the hydraulic press is closed, at the moment, the two groups of clamping plates are positioned on two sides of the steel rail, then the rotating head is reversely adjusted, so that the forward rotation threaded rod and the reverse rotation threaded rod simultaneously rotate in the opposite direction, at the moment, the two groups of clamping plates move to the middle part and are finally clamped on the outer surface of the steel rail, and the clamping and fixing of the clamping assembly on the steel rail are completed.
3. According to the invention, the deflector rods at two sides of the equipment table are rotated, so that the adjusting screw rod rotates at the side face of the equipment table, the connecting strip moves on the outer surface of the adjusting screw rod, the connecting strip drives the two groups of fixing seats to slide along the sliding grooves at the upper surface of the equipment table through the sliding rod, then the inserted rod is pulled out from the side face of the fixing seats, the fixing block is taken down, the steel rail is placed in the fixing groove, then the fixing block is placed in the fixing groove and positioned on the upper surface of the steel rail, the inserted rod is inserted into the fixing hole and movably clamped with the inner side wall of the fixing groove, at the moment, one end of the steel rail is clamped in one group of fixing seats by the fixing block, and then the other end of the steel rail is fixed in the other group of fixing seats, so that the test length of the clamped steel rail can be conveniently adjusted in use.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a data detection test bed for railway rails provided by the invention;
FIG. 2 is a schematic view of the external surface structure of the tension meter used in the railway steel rail data detection test bed provided by the invention;
FIG. 3 is a schematic view of a portion A of FIG. 1;
FIG. 4 is a schematic view of a clamping assembly for use in a railway rail data detection test stand according to the present invention;
FIG. 5 is a schematic diagram of a connection structure of a sliding rod and an adjusting threaded rod in a railway steel rail data detection test bed provided by the invention;
FIG. 6 is a schematic view of the internal structure of the fixing seat in the railway steel rail data detection test bed provided by the invention;
FIG. 7 is a flow chart of a scheme provided by the invention for identifying the deformation of a steel rail by a railway steel rail data detection test bed;
fig. 8 is a working schematic diagram of the data detection test bed for the railway steel rail provided by the invention.
The principal reference numerals illustrate.
Detailed Description
The invention will be described in further detail below with reference to examples and with reference to the accompanying drawings.
Referring to fig. 1 to 6, there is shown a data detection test stand for railway rails and a method of using the same in accordance with the present invention, including a machine stand 1.
As shown in fig. 1, a support frame 2 is fixedly connected to the upper surface of an equipment table 1, a hydraulic press 3 is fixedly connected to the top end of the support frame 2, an output end of the hydraulic press 3 penetrates through the support frame 2 and is fixedly connected with a punching rod 14 in a downward extending manner, a clamping component 8 is connected to the bottom end of the punching rod 14 in a threaded manner, a sliding groove 4 is formed in the upper surface of the equipment table 1 and below the support frame 2, a fixing seat 5 is slidably connected to the inside of the sliding groove 4, a sliding rod 6 is fixedly connected to the side surface of the fixing seat 5, one end, away from the fixing seat 5, of the sliding rod 6 extends to the side surface of the equipment table 1 from two sides, and a tension meter 7 is movably clamped to the side surface of the support frame 2;
the high-definition camera 23 is arranged on the inner side of the support frame and used for identifying deformation of a detected steel rail, the tablet personal computer 24, the 5G module 25 and the analog quantity collector 26 are arranged on one side above the equipment table, the analog quantity collector 26 is used for receiving information collected by the tension meter 7 and the compression counter 13, the information is converted into digital signals in the analog quantity collector 26 and transmitted to the tablet personal computer 24, the high-definition camera 23 sends the collected image information to the tablet personal computer 24, image identification is carried out in the tablet personal computer 24, deformation of the detected steel rail is identified, hardness and toughness of the steel rail are calculated in the tablet personal computer 24, life prediction is carried out on the steel rail according to the calculated result, the 5G module 25 is controlled to send the calculated result to the server, the service life of the used steel rail can be inquired through accessing the server, and related departments are informed of replacing the steel rail before the steel rail breaks down, and the train is safely operated to protect the train.
As shown in fig. 4, clamping assembly 8 includes fixed plate 81, first screw thread sleeve 82, splint 83, forward screw thread rod 84, reverse screw thread rod 85, rotating head 86 and slider 87, the upper surface at fixed plate 81 is fixed connection to first screw thread sleeve 82, the movable groove has been seted up to the lower surface of fixed plate 81, forward screw thread rod 84 rotates the inside of connecting at the movable groove, the one end fixedly connected with reverse screw thread rod 85 of forward screw thread rod 84, the other end of forward screw thread rod 84 extends to the lateral surface fixedly connected with rotating head 86 of fixed plate 81, the upper surface fixedly connected with slider 87 of splint 83, slider 87 sliding connection is in the inside of movable groove, two sets of sliders 87 threaded connection are at the surface of forward screw thread rod 84 and reverse screw thread rod 85 respectively, the one end bearing connection of forward screw thread rod 84 is kept away from in the inside of fixed plate 81, at this moment, through rotating the side rotation of screw rod 86 at fixed plate 81, make forward screw rod 84 and reverse screw rod 85 co-rotate simultaneously, the other end of forward screw rod 84 and reverse screw rod 85, the other end of forward screw rod 84 extends to the lateral surface at fixed plate 81, then make two sets of splint 83 rotate the opposite direction joint 3 under fixed plate 81, then make two sets of hydraulic press 3 and the opposite sides of clamping assembly rotate the two sets of clamping head 83, make the two sets of hydraulic press 3 and the opposite end joint 3, then make the two sets of clamping head 83 rotate, and the opposite end 3 is located at the opposite end and opposite to the fixed rail 83, and then rotates, and is located at the opposite end 3.
As shown in fig. 1-4, the second threaded sleeve 9 is fixedly connected to the top of the tension meter 7, the connecting screw 10 is fixedly connected to the bottom output end of the tension meter 7, the external threads are provided on the outer surface of the bottom end of the stamping rod 14, the first threaded sleeve 82 and the second threaded sleeve 9 are matched with the external threads on the bottom end of the stamping rod 14, the connecting screw 10 is matched with the first threaded sleeve 82, the barrier strip 11 is fixedly connected to the inner side wall of the support frame 2, the bottom end of the stamping rod 14 penetrates through the upper surface of the barrier strip 11 and extends downwards, the pressing strip 12 is fixedly connected to the outer surface of the bottom end of the hydraulic machine 3, the upper surface of the barrier strip 11 is fixedly connected to the pressing counter 13 under the pressing strip 12, repeated bending experiments are performed by moving up and down at the output end of the stamping rod 14, when the output end of the hydraulic machine 3 extends completely, the pressing strip 12 on the outer surface of the output end of the hydraulic machine 3 is just contacted with the upper surface of the pressing counter 13, the pressing counter 13 is performed at the moment, the pressing counter 13 is displayed for one time, when the output end of the hydraulic machine contracts, the steel rail is driven to move upwards, the number of the pressing counter 13 is not equal to half of actual number of times when the number of times of bending is not counted, and the actual number of times of bending is not counted is observed.
As shown in fig. 1, 5 and 6, the middle part of the upper surface of the fixed seat 5 is provided with a fixed slot 18, the inside of the fixed slot 18 is movably clamped with a fixed block 19, the side surface of the fixed block 19 is provided with a fixed hole 20, the side surface of the fixed seat 5 is movably inserted with an inserted rod 22, the end part of the inserted rod 22 penetrates through the fixed hole 20 and is movably inserted with the inner side wall of the fixed slot 18, the lower surface of the fixed seat 5 is fixedly connected with a movable block 21, one end of the sliding rod 6 is fixedly connected with the side surface of the movable block 21, the other end of the sliding rod 6 extends to the outer side wall of the equipment table 1 and is fixedly connected with a connecting strip 15, the middle part of the side surface of the connecting strip 15 is in threaded connection with an adjusting screw 16, one end of the adjusting screw 16 penetrates through the connecting strip 15 and is rotatably connected with the outer side wall of the equipment table 1, the other end of the adjusting screw 16 is fixedly connected with a deflector rod 17 at two sides of the equipment table 1 through rotation, the adjusting screw 16 is made to rotate on the side face of the equipment platform 1, at this time, the connecting strip 15 moves on the outer surface of the adjusting screw 16, the connecting strip 15 drives the two groups of fixing seats 5 to slide along the sliding groove 4 on the upper surface of the equipment platform 1 through the sliding rod 6, the two groups of fixing seats 5 move from the middle to two sides, the distance from one group of fixing seats 5 to the lower surface of the stamping rod 14 is equal to the length of a steel rail, the other group of fixing seats 5 move to the tail end of the sliding groove 4, then the inserting rod 22 is pulled out from the side face of the fixing seats 5, then the fixing block 19 is taken down, the steel rail is placed in the fixing groove 18, then the fixing block 19 is placed in the fixing groove 18 and is located on the upper surface of the steel rail, then the inserting rod 22 is inserted into the fixing hole 20 and movably clamped with the inner side wall of the fixing groove 18, and at this time, one end of the steel rail is clamped in the inside of one group of fixing seats 5 by the fixing block 19.
Referring to fig. 7 and 8, the scheme for identifying the deformation of the steel rail is as follows:
the corresponding image recognition program is designed in the tablet personal computer 24, the image acquired by the high-definition camera 23 is subjected to gray processing, the calculation complexity is reduced, the gray-processed image is subjected to filtering and denoising processing by adopting a two-dimensional median filtering algorithm, the image is segmented by adopting a region segmentation algorithm, the steel rail image is separated from the background image, the segmented image is subjected to binarization processing, the binarized image is subjected to open operation and close operation processing by adopting a morphological image processing algorithm, the relatively complete steel rail image is obtained, and finally the deformation quantity of the steel rail is calculated by adopting a pixel integration method.
The steel rail life prediction scheme is as follows:
in the actual running process of the steel rail, fatigue damage is not constant, but shows an exponential increase trend, so that the service life of the steel rail is predicted by adopting a gray prediction algorithm;
the predictions were made using the gray predicted GM (1, 1) model, whose differential equation is:
wherein a is a development coefficient, b is an ash action amount, and two values of a and b can be obtained by a least square method through a small sample generation sequence of two data of hardness and toughness of the steel rail; let the original data sequence of the sample be X (0) (k)＝{X (0) (k) K=1, 2, once again the number of the groups is once again n, the data sequence generated by the original number can be obtained through one accumulation: x is X (1) (k)＝{X (1) (k) K=1, 2, once again the number of the groups is once again n, wherein the method comprises the steps ofThe two parameters a, b to be identified are calculated by the least square method:
wherein:
Y N ＝[x (0) (2),x (0) (3),......x (0) (n)] T (4)
and calculating parameters a and b to obtain a solution of a differential equation:
according toAnd performing accumulation and subtraction calculation to obtain the predicted value of the original data:
and building a GM (1, 1) model from a small amount of two original data of hardness and toughness, obtaining a predicted numerical value, adding the obtained numerical value into the original data, deleting the first data, and repeating the above operation to know the predicted data requirements of the hardness and toughness life of the steel rail.
The working principle and working process of the invention are as follows:
the invention discloses a railway steel rail data detection test bed and a use method thereof, wherein the device is mainly used for testing the hardness and toughness capacity of a railway steel rail, and the two performance tests are required to be separately carried out in the process of the two performance tests, so that two test modes exist.
Firstly, testing hardness of railway rails, firstly, selecting a section of brand-new unused rails with good appearance, then rotating a deflector rod 17 at two sides of a device table 1 to enable an adjusting screw rod 16 to rotate at the side surface of the device table 1, at the moment, enabling a connecting bar 15 to move on the outer surface of the adjusting screw rod 16, enabling the connecting bar 15 to drive two groups of fixed seats 5 to slide along a sliding groove 4 on the upper surface of the device table 1 through a sliding rod 6 to enable the two groups of fixed seats 5 to move from the middle to two sides, at the moment, taking care to ensure that the moving distance of the two groups of fixed seats 5 is the same, then extracting a plug rod 22 from the side surface of the fixed seats 5, then taking down a fixed block 19, placing the rails into the inside of a fixed groove 18, then placing the fixed block 19 into the inside of the fixed groove 18 and on the upper surface of the rails, inserting the plug rod 22 into the inside of the fixed hole 20, and movably clamping the inner side walls of the fixed groove 18, at this time, the fixing block 19 clamps one end of the steel rail inside one set of fixing seats 5, then fixes the other end of the steel rail inside the other set of fixing seats 5 in the same way, measures the distance between the two sets of fixing seats 5, then takes down the first threaded sleeve 82 from the bottom thread of the stamping rod 14, then takes down the tension meter 7 from the side of the supporting frame 2, and connects the second threaded sleeve 9 at the top end of the tension meter 7 with the bottom thread of the stamping rod 14, then connects the first threaded sleeve 82 with the outer surface of the bottom connecting screw 10 of the tension meter 7 in a threaded manner, then rotates the rotating head 86 on the side of the fixing plate 81, so that the forward threaded rod 84 and the reverse threaded rod 85 simultaneously rotate in the same direction, at this time, the two sets of clamping plates 83 move to two sides on the lower surface of the fixing plate 81, then starts the hydraulic press 3, so that the output end of the hydraulic press 3 moves downward for a distance, then closing the hydraulic press 3, at this moment, two groups of clamping plates 83 are located on two sides of a steel rail, then reversely adjusting the rotating heads 86, enabling the forward rotating threaded rod 84 and the reverse rotating threaded rod 85 to simultaneously reversely rotate, at this moment, moving the two groups of clamping plates 83 to the middle and finally clamping the outer surface of the steel rail, at this moment, completing the installation of experimental equipment, then enabling the output end of the hydraulic press 3 to shrink upwards by starting the hydraulic press 3, enabling the pressing rod 14 to drive the clamping assembly 8 to move upwards through the tensiometer 7, pulling the middle of the steel rail, then observing the tensiometer 7, observing whether the steel rail is deformed or not in the upward moving process of the hydraulic press 3, recording the reading of the tensiometer 7 at the moment that the steel rail is deformed, wherein the reading is the tension bearing limit of the steel rail in the length range, then replacing one group of steel rail, then adjusting the distance between the two groups of fixing seats 5 through rotating the deflector rod 17, then fixing the steel rail between the two groups of fixing seats 5, conducting a secondary tension test through the hydraulic press 3, recording the distance between the two groups of steel rail and the tension value during deformation, and calculating the hardness of the steel rail through a plurality of groups of tests.
Secondly, selecting a section of steel rail which is complete in appearance and is completely new and unused again, then rotating the deflector rods 17 on two sides of the equipment platform 1 to enable the adjusting screw rod 16 to rotate on the side surface of the equipment platform 1, enabling the connecting rod 15 to move on the outer surface of the adjusting screw rod 16, enabling the connecting rod 15 to drive the two groups of fixed seats 5 to slide on the upper surface of the equipment platform 1 along the sliding groove 4 through the sliding rod 6, enabling the two groups of fixed seats 5 to move from the middle to two sides, enabling the distance from one group of fixed seats 5 to the lower surface of the stamping rod 14 to be equal to the length of the steel rail, enabling the other group of fixed seats 5 to move to the tail end of the sliding groove 4, then extracting the inserted rod 22 from the side surface of the fixed seats 5, then taking down the fixed block 19, placing the steel rail into the inside of the fixed groove 18, then placing the fixed block 19 into the inside of the fixed groove 18 and being located on the upper surface of the steel rail, then inserting the inserted rod 22 into the inside of the fixed hole 20, and is movably clamped with the inner side wall of the fixed groove 18, at the moment, one end of a steel rail is clamped in one group of fixed seats 5 by the fixed block 19, then the first threaded sleeve 82 is in threaded connection with the bottom end of the stamping rod 14, then the rotating head 86 is rotated on the side surface of the fixed plate 81, so that the positive rotation threaded rod 84 and the reverse rotation threaded rod 85 simultaneously rotate in the same direction, at the moment, two groups of clamping plates 83 move towards two sides on the lower surface of the fixed plate 81, then the hydraulic machine 3 is started, so that the hydraulic machine 3 moves downwards for a certain distance, then the hydraulic machine 3 is closed, at the moment, two groups of clamping plates 83 are positioned on two sides of the steel rail, then the rotating head 86 is reversely adjusted, so that the positive rotation threaded rod 84 and the reverse rotation threaded rod 85 simultaneously rotate reversely, at the moment, the two groups of clamping plates 83 move towards the middle part and are finally clamped on the outer surface of the steel rail, then the hydraulic machine 3 is started, so that the output end of the hydraulic machine 3 continuously stamps up and down at a uniform speed, at this moment, one end of the steel rail is fixed inside the fixed seat 5, the other end of the steel rail moves up and down along with the clamping component 8 at the output end of the stamping rod 14 to carry out repeated bending experiments, when the output end of the hydraulic press 3 stretches out completely, the pressing strip 12 on the outer surface of the output end of the hydraulic press 3 just contacts with the upper surface of the pressing counter 13, the pressing counter 13 is pressed once at this moment, when the output end of the hydraulic press 3 contracts, the end of the steel rail is driven to move upwards, the pressing counter 13 does not count at this moment, therefore, the number of the pressing counter 13 displays the steel rail equal to half of the actual bending times, then the condition of the steel rail is observed in the continuous bending process, when the bending position of the steel rail has cracks or breaks, the experiment is stopped, then another group of steel rails is replaced to carry out a second group of experiments, the repeated times and the average value of the bending times is taken, and the toughness of the steel rail is calculated.
The analog quantity collector 26 receives information collected by the tension meter 7 and the pressing counter 13, the information is converted into digital signals in the analog quantity collector 26 and transmitted to the tablet personal computer 24, the high-definition camera 23 sends the collected image information to the tablet personal computer 24, image recognition is carried out in the tablet personal computer 24, the deformation quantity of the detected steel rail is recognized, the tablet personal computer 24 calculates the hardness and toughness of the steel rail according to the data collected by the tension meter 7 and the pressing counter 13, life prediction is carried out on the steel rail according to the calculated result, the 5G module 25 is controlled to send the calculated result to the server, the service life of the used steel rail can be inquired through accessing the server, and related departments are informed of replacing the steel rail before the steel rail breaks down, so that driving and navigation are protected for train safety operation.
Claims (8)
1. The utility model provides a be used for railway rail data detection test bench, includes equipment platform (1), its characterized in that: the device comprises a supporting frame (2) fixedly connected with the upper surface of a device table (1), a hydraulic press (3) is fixedly connected with the top end of the supporting frame (2), the output end of the hydraulic press (3) penetrates through the supporting frame (2) and is fixedly connected with a stamping rod (14) in a downward extending mode, a clamping assembly (8) is connected with the bottom end of the stamping rod (14) in a threaded mode, a sliding groove (4) is formed in the upper surface of the device table (1) and located below the supporting frame (2), a fixing seat (5) is connected to the inner portion of the sliding groove (4) in a sliding mode, a sliding rod (6) is fixedly connected to the side face of the fixing seat (5), one end, away from the fixing seat (5), of the sliding rod (6) extends to the side face of the device table (1) towards two sides, and a tension gauge (7) is movably clamped on the side face of the supporting frame (2).
The high-definition camera (23) is arranged on the inner side of the supporting frame (2) and used for identifying deformation of a detected steel rail, the tablet personal computer (24), the 5G module (25) and the analog quantity collector (26) are arranged on one side above the equipment table, the analog quantity collector (26) is used for receiving information acquired by the tension meter (7) and the pressing counter (13), the information is converted into digital signals in the analog quantity collector (26) and transmitted to the tablet personal computer (24), the high-definition camera (23) sends the acquired image information to the tablet personal computer (24), image identification is carried out in the tablet personal computer (24), deformation of the detected steel rail is identified, hardness and toughness of the steel rail are calculated in the tablet personal computer (24), life prediction is carried out on the steel rail according to the calculated result, the 5G module (25) is controlled to send the calculated result to the server, and the service life of the used steel rail can be inquired through accessing the server.
The clamping assembly (8) comprises a fixed plate (81), a first threaded sleeve (82), a clamping plate (83), a forward threaded rod (84), a reverse threaded rod (85), a rotating head (86) and a sliding block (87), wherein the first threaded sleeve (82) is fixedly connected to the upper surface of the fixed plate (81), a moving groove is formed in the lower surface of the fixed plate (81), the forward threaded rod (84) is rotationally connected to the inside of the moving groove, one end of the forward threaded rod (84) is fixedly connected with the reverse threaded rod (85), the other end of the forward threaded rod (84) extends to the outer side face of the fixed plate (81) and is fixedly connected with the rotating head (86), the upper surface of the clamping plate (83) is fixedly connected with the sliding block (87), the sliding block (87) is slidingly connected to the inside of the moving groove, and two groups of sliding blocks (87) are respectively in threaded connection with the outer surfaces of the forward threaded rod (84) and the reverse threaded rod (85).
The fixing device is characterized in that a fixing groove (18) is formed in the middle of the upper surface of the fixing seat (5), a fixing block (19) is movably clamped in the fixing groove (18), a fixing hole (20) is formed in the side face of the fixing block (19), an inserting rod (22) is movably inserted into the side face of the fixing seat (5), and the end part of the inserting rod (22) penetrates through the fixing hole (20) and is movably inserted into the inner side wall of the fixing groove (18);
the utility model discloses a device comprises a fixed seat (5), a movable block (21) is fixedly connected with the lower surface of the fixed seat (5), one end fixed connection of sliding rod (6) is in the side of movable block (21), the other end of sliding rod (6) extends to lateral wall fixedly connected with connecting strip (15) of equipment platform (1), lateral surface middle part threaded connection of connecting strip (15) has adjusting screw (16), one end through-connection strip (15) of adjusting screw (16) rotates to be connected on the lateral wall of equipment platform (1), other end surface fixedly connected with driving lever (17) of adjusting screw (16).
2. The data detection test stand for railway rails of claim 1, wherein: the top fixedly connected with second screw sleeve (9) of tensiometer (7), the bottom output fixedly connected with connecting screw rod (10) of tensiometer (7).
3. The data detection test stand for railway rails of claim 2, wherein: external screw threads are formed on the outer surface of the bottom end of the stamping rod (14), the first screw thread sleeve (82) and the second screw thread sleeve (9) are matched with the external screw threads on the bottom end of the stamping rod (14), and the connecting screw (10) is matched with the first screw thread sleeve (82).
4. The data detection test stand for railway rails of claim 1, wherein: the direction of the thread grooves on the outer surfaces of the positive rotation threaded rod (84) and the reverse rotation threaded rod (85) is opposite, and one end of the reverse rotation threaded rod (85) far away from the positive rotation threaded rod (84) is connected in the fixing plate (81) through a bearing.
5. The data detection test stand for railway rails of claim 1, wherein: the inner side wall of the supporting frame (2) is fixedly connected with a barrier strip (11), and the bottom end of the stamping rod (14) penetrates through the upper surface of the barrier strip (11) and extends downwards.
6. The data detection test stand for railway rails of claim 5, wherein: the outer surface of the bottom end of the hydraulic machine (3) is fixedly connected with a pressing bar (12), and the upper surface of the barrier bar (11) is fixedly connected with a pressing counter (13) right below the pressing bar (12).
7. Use of a test stand for the detection of railway rail data according to any one of claims 1 to 6, characterized in that it comprises the following steps: firstly, performing hardness test on railway rails, firstly, selecting a section of brand-new unused rails with good appearance, then rotating a deflector rod (17) at two sides of a device table (1) to enable an adjusting screw rod (16) to rotate at the side surface of the device table (1), enabling a connecting bar (15) to move at the outer surface of the adjusting screw rod (16), enabling the connecting bar (15) to drive two groups of fixing seats (5) to slide along a sliding groove (4) at the upper surface of the device table (1) through a sliding rod (6) to enable the two groups of fixing seats (5) to move from the middle to two sides, ensuring that the moving distances of the two groups of fixing seats (5) are the same, then drawing out an inserting rod (22) from the side surface of the fixing seat (5), then the fixed block (19) is taken down, the steel rail is placed in the fixed groove (18), then the fixed block (19) is placed in the fixed groove (18) and positioned on the upper surface of the steel rail, then the inserted link (22) is inserted into the fixed hole (20) and movably clamped with the inner side wall of the fixed groove (18), at the moment, one end of the steel rail is clamped in one group of fixed seats (5) by the fixed block (19), then the other end of the steel rail is fixed in the other group of fixed seats (5) in the same way, the distance between the two groups of fixed seats (5) is measured, then the first threaded sleeve (82) is taken down from the bottom threads of the stamping rod (14), then the tension meter (7) is taken down from the side face of the supporting frame (2), the second threaded sleeve (9) at the top end of the tension meter (7) is in threaded connection with the bottom end of the stamping rod (14), the first threaded sleeve (82) is in threaded connection with the outer surface of the bottom end connecting screw rod (10) of the tension meter (7), then the rotating head (86) is rotated on the side face of the fixed plate (81), the positive threaded rod (84) and the reverse threaded rod (85) are enabled to simultaneously rotate in the same direction, at the moment, the two groups of clamping plates (83) are enabled to move towards two sides on the lower surface of the fixed plate (81), then the hydraulic press (3) is started, the output end of the hydraulic press (3) is enabled to move downwards for a distance, then the hydraulic press (3) is closed, at the moment, the two groups of clamping plates (83) are located at two sides of a steel rail, then the rotating head (86) is reversely adjusted, at the moment, the positive threaded rod (84) and the reverse threaded rod (85) are enabled to simultaneously rotate reversely, at the moment, the two groups of clamping plates (83) move towards the middle part and finally clamp the outer surface of the steel rail, experimental equipment is completed, then the hydraulic press (3) is enabled to be started, the output by the hydraulic press (3) is enabled to move upwards, the output end of the clamping plate (7) is enabled to move upwards, the tension meter (14) upwards) is enabled to move upwards, and the tension meter is observed, and the middle part (7) is clamped to move upwards, and the tension meter is moved upwards, and the tension bar (7) is moved upwards through the tension rod (14), observing whether the steel rail is deformed, recording the reading of a tension meter (7) at the moment of the deformation of the steel rail, wherein the reading is the tension bearing limit of the steel rail in the length range, replacing one group of steel rails, adjusting the distance between two groups of fixed seats (5) by rotating a deflector rod (17), fixing the steel rail between the two groups of fixed seats (5), performing a secondary tension test by a hydraulic press (3), recording the distance between the two groups of steel rails and the tension value of the steel rail during the deformation, and calculating the hardness of the steel rail by a plurality of groups of tests.
8. The method of using a railway rail data detection test stand according to claim 7, further comprising the steps of:
selecting a section of steel rail which is good in appearance and is completely new and unused again, then rotating the deflector rods (17) on two sides of the equipment table (1) to enable the adjusting screw rod (16) to rotate on the side face of the equipment table (1), enabling the connecting strip (15) to move on the outer surface of the adjusting screw rod (16), enabling the connecting strip (15) to drive the two groups of fixed seats (5) to slide on the upper surface of the equipment table (1) along the sliding groove (4) through the sliding rod (6) to enable the two groups of fixed seats (5) to move from the middle part to two sides, enabling the distance from one group of fixed seats (5) to the lower surface of the stamping rod (14) to be equal to the length of the steel rail, enabling the other group of fixed seats (5) to move to the tail end of the sliding groove (4), then the inserted link (22) is pulled out from the side face of the fixed seat (5), then the fixed block (19) is taken down, the steel rail is placed in the fixed groove (18), then the fixed block (19) is placed in the fixed groove (18) and positioned on the upper surface of the steel rail, then the inserted link (22) is inserted into the fixed hole (20) and movably clamped with the inner side wall of the fixed groove (18), at the moment, one end of the steel rail is clamped in a group of fixed seats (5) by the fixed block (19), then the first threaded sleeve (82) is connected with the bottom end of the stamping bar (14) in a threaded manner, then the rotating head (86) is rotated on the side face of the fixed plate (81), the forward rotation threaded rod (84) and the reverse rotation threaded rod (85) simultaneously rotate in the same direction, at the moment, two groups of clamping plates (83) move to two sides on the lower surface of the fixed plate (81), then the hydraulic press (3) is started, the hydraulic press (3) moves downwards for a certain distance, then the hydraulic press (3) is closed, at the moment, the two groups of clamping plates (83) are positioned on two sides of the steel rail, then the rotating head (86) is reversely adjusted, the forward rotation threaded rod (84) and the reverse rotation threaded rod (85) simultaneously rotate in the opposite direction, at the moment, the two groups of clamping plates (83) move to the middle part and are finally clamped on the outer surface of the steel rail, then the hydraulic press (3) is started, at the moment, one end of the steel rail is fixed inside the fixed seat (5), the other end of the steel rail moves up and down along with the clamping assembly (8) at the output end of the stamping rod (14) for repeated bending experiments, at the moment, when the output end of the hydraulic press (3) is completely extended, the pressing bar (12) on the outer surface of the output end of the hydraulic press (3) is just contacted with the upper surface of the pressing counter (13), the counter (13) at the moment, the counter (13) is pressed down at the time, the counter (13) is pressed one time, the number of times is equal to the number of times when the counter (13) is pressed down, and the counter (13) is actually pressed is driven, at the number of times, and the counter (13) is pressed, and then observing the condition of the steel rail in the continuous bending process, stopping the experiment when the bending part of the steel rail is cracked or broken, replacing another group of steel rail to perform a second group of experiment, repeating the experiment for a plurality of times and taking the average value of the bending times, thereby calculating the toughness of the steel rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011062314.6A CN112378761B (en) | 2020-09-30 | 2020-09-30 | Data detection test bed for railway steel rail and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011062314.6A CN112378761B (en) | 2020-09-30 | 2020-09-30 | Data detection test bed for railway steel rail and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112378761A CN112378761A (en) | 2021-02-19 |
| CN112378761B true CN112378761B (en) | 2023-10-24 |
Family
ID=74581027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011062314.6A Active CN112378761B (en) | 2020-09-30 | 2020-09-30 | Data detection test bed for railway steel rail and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112378761B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113311103A (en) * | 2021-04-20 | 2021-08-27 | 吴玮 | Exhaust gas detection device for factory smoke exhaust pipeline port |
| CN113567145A (en) * | 2021-06-08 | 2021-10-29 | 中汽研汽车检验中心（天津）有限公司 | Retarding braking performance test measurement method and device for simulating ramp method |
| CN115452604B (en) * | 2022-08-31 | 2023-08-22 | 江苏茂华检验检测有限公司 | Lateral bending detection test device for dissimilar steel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05322829A (en) * | 1991-05-22 | 1993-12-07 | Nippon Steel Corp | Nondestructive method for measuring transverse fatigue cracking in rail |
| CN101614636A (en) * | 2009-06-16 | 2009-12-30 | 西南交通大学 | Clamp for rail fatigue experiment under the moment of flexure effect |
| CN103674514A (en) * | 2013-11-12 | 2014-03-26 | 芜湖普威技研有限公司 | Rear drag arm fatigue test device |
| CN206049709U (en) * | 2016-08-31 | 2017-03-29 | 许志林 | A kind of railroad survey gauge measures detection means |
| CN109263683A (en) * | 2018-11-15 | 2019-01-25 | 大连理工大学 | Rail detection unit special fixture |
| CN110849720A (en) * | 2019-12-19 | 2020-02-28 | 上海工程技术大学 | Monitoring system and analysis system for steel rail longitudinal resistance test based on image recognition |
-
2020
- 2020-09-30 CN CN202011062314.6A patent/CN112378761B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05322829A (en) * | 1991-05-22 | 1993-12-07 | Nippon Steel Corp | Nondestructive method for measuring transverse fatigue cracking in rail |
| CN101614636A (en) * | 2009-06-16 | 2009-12-30 | 西南交通大学 | Clamp for rail fatigue experiment under the moment of flexure effect |
| CN103674514A (en) * | 2013-11-12 | 2014-03-26 | 芜湖普威技研有限公司 | Rear drag arm fatigue test device |
| CN206049709U (en) * | 2016-08-31 | 2017-03-29 | 许志林 | A kind of railroad survey gauge measures detection means |
| CN109263683A (en) * | 2018-11-15 | 2019-01-25 | 大连理工大学 | Rail detection unit special fixture |
| CN110849720A (en) * | 2019-12-19 | 2020-02-28 | 上海工程技术大学 | Monitoring system and analysis system for steel rail longitudinal resistance test based on image recognition |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112378761A (en) | 2021-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112378761B (en) | Data detection test bed for railway steel rail and use method thereof | |
| CN103308322B (en) | Car door dynamically closes energy testing system | |
| CN110936978B (en) | Ballastless track interlayer gap measuring method and device based on measuring trolley | |
| CN109765097A (en) | A kind of tunnel surrounding rapid classification method based on RPD drilling machine | |
| CN101329237A (en) | Device for measuring breaking- after lateral swelling capacity of impact test piece after irradiation | |
| CN210243643U (en) | Mechanical stripping performance testing device for iron scale of wire rod | |
| CN204314158U (en) | Cable hut torsion tester | |
| CN217930842U (en) | Tire crack initiation resistance testing device | |
| CN211848795U (en) | Pavement pit detection device | |
| CN115615861A (en) | Composite rope core wear resistance detection tool for steel wire rope | |
| CN202092914U (en) | Compressive strength detection device for fresh pellets | |
| CN103163065B (en) | Cold extrusion lubricating effect detecting device and detecting method | |
| CN209727628U (en) | A kind of strain-type unconfined compression apparatus | |
| CN206804247U (en) | A kind of 120MN bridge pad test machines of Dynamic High-accuracy measurement | |
| CN206362546U (en) | Slide switch endurance testing device | |
| CN220689976U (en) | Road asphalt layer lays thickness detection machine | |
| CN105548202A (en) | Automatic concrete shrinkage crack monitoring system | |
| CN219957141U (en) | Geological rock soil investigation intensity test device | |
| CN116930452A (en) | Rock point load automatic acquisition device and system thereof | |
| CN217505416U (en) | Toughness detection equipment for pc draw-bar box | |
| CN215575251U (en) | Locomotive signal alarm detection device | |
| CN219188184U (en) | Stress monitoring device for collecting punching machine | |
| CN215492893U (en) | High toughness alloy steel hardness detection device based on special type processing | |
| CN220438062U (en) | Metal piece hardness detection equipment | |
| CN216594579U (en) | Anti-bending testing machine for concrete test block |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |