Railway roadbed strength testing equipment

Abstract

The present invention discloses a railway roadbed strength detection device, which belongs to the field of railway roadbed detection technology. The railway roadbed strength detection device includes a support base plate, each corner of the top of the support base plate is fixedly connected to an adjustable movable mechanism, counterweight blocks are installed on both sides of the top of the support base plate, and a horizontal level and a vertical level are installed on the front end and one side of the top of the support base plate respectively. The present invention designs a detection drive mechanism, an adjustment and positioning mechanism, and a detection mechanism. The detection mechanism is driven by the detection drive mechanism, and the roadbed strength can be judged by compressing the detection component on the roadbed by a specific distance and transmitting the pressure data in real time. A maximum pressure comparison value can be measured according to a standard roadbed for comparison with the measurement data. The detection accuracy range of this method is high, the measurement is more accurate, and multiple measurements can be performed on the roadbed in real time.

Description

Technical Field

[0001] The invention belongs to the technical field of railway roadbed detection, and in particular relates to railway roadbed strength detection equipment. Background Art

[0002] Railways are track lines for trains, high-speed trains and other vehicles to travel on. Railway transportation is a land transportation method in which locomotives pull train vehicles on two parallel tracks. The traditional method is steel wheel transportation, but railway transportation in a broad sense also includes non-steel wheel transportation methods such as magnetic levitation trains, cable cars, and ropeways, or rail transportation. The rails can provide an extremely smooth and hard medium for train wheels to roll on with minimal friction. The railway subgrade is a structure that bears and transmits the gravity of the track and the dynamic effects of the train. It is the foundation of the track and an important building to ensure the operation of the train. The subgrade is a soil and rock structure that exists in various terrain, geological, hydrological and climatic environments, and is sometimes subject to various disasters such as floods, mudslides, collapses, earthquakes, etc. Due to the huge weight of vehicles such as trains and high-speed trains, the bottom subgrade needs to be processed during railway construction so that its compaction, deflection and other indicators meet the standard range.

[0003] Railway subgrade strength testing primarily focuses on its compaction. Compaction, also known as tamping, refers to the ratio of the dry density of compacted soil or other road-building materials to the standard maximum dry density, expressed as a percentage. Subgrade and pavement compaction quality is one of the most important internal indicators for road construction quality management. Only by fully compacting the subgrade and pavement structures can the strength, stiffness, stability, and smoothness of the subgrade and pavement be guaranteed, thereby extending the service life of the subgrade and pavement. Existing methods for railway subgrade testing include sampling and dynamic probing. The former requires removing and squeezing pavement samples to observe their compression, but this method is cumbersome and requires sampling. The latter uses a dynamic probing instrument, which drops a hammer head freely. The penetration depth of the probing rod into the subgrade and the change in the probing curve are used to assess the subgrade's compaction. The probing depth and probing curve can reflect the subgrade's compaction, but this method suffers from large errors and cannot accurately reflect the degree of compaction. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a railway roadbed strength detection device.

[0005] The technical solution adopted to solve the above technical problems is: a railway roadbed strength testing device, comprising a supporting base plate, each corner of the top of the supporting base plate is fixedly connected to an adjustable movable mechanism, both sides of the top of the supporting base plate are installed with counterweight blocks, and the front end and one side of the top of the supporting base plate are respectively installed with a horizontal level and a vertical level;

[0006] Both sides of the center of the top of the support base are fixedly connected with U-shaped support steel plates, and the two U-shaped support steel plates are provided with scale lines on the sides away from each other, and a detection drive mechanism is fixedly connected between the tops of the two U-shaped support steel plates;

[0007] The front end surfaces of the two U-shaped support steel plates are fixedly connected with an adjustment and positioning mechanism, and a detection mechanism is slidably connected between the two U-shaped support steel plates. An extrusion detection component is installed at the bottom of the detection mechanism.

[0008] Furthermore, the adjustable movable mechanism includes an arc-shaped protective shell fixedly connected to the top of the supporting base plate, the top of the arc-shaped protective shell is fixedly connected to a fixed limiting shell sleeve, the inner wall of the fixed limiting shell sleeve is slidably connected to a sliding supporting shell sleeve, the bottom of the sliding supporting shell sleeve is fixedly connected to a U-shaped support plate, the front and rear ends of the bottom of the U-shaped support plate are both installed with connecting bearings, a supporting roller is installed between the two connecting bearings, the top of the sliding supporting shell sleeve is fixedly connected to a double-layer limiting cylinder, the top of the double-layer limiting cylinder is fixedly connected to a first threaded column, the outer wall of the first threaded column is spirally connected to a double-layer adjusting screw sleeve, and a plurality of rolling steel balls are installed between the double-layer adjusting screw sleeve and the two sides of the top of the fixed limiting shell sleeve.

[0009] Through the above technical solution, observe the horizontal level and the vertical level, and adjust the corresponding adjustable moving mechanism according to the degree of horizontal offset. During adjustment, rotate the double-layer adjusting screw sleeve, and then as the double-layer adjusting screw sleeve rotates, the first threaded column begins to drive the double-layer limiting cylinder and the sliding support shell to complete the rise and fall, and then the rise and fall of the support roller can be completed through the U-shaped support plate, the position adjustment of the support point of the support roller is realized, and the horizontal adjustment of the entire equipment is completed until the horizontal level and the vertical level display are observed to be within the appropriate horizontal range.

[0010] Furthermore, the cross-sections of the double-layer limiting cylinder and the double-layer adjusting screw sleeve are both I-shaped structures, and a plurality of rolling steel balls are respectively distributed between the two top surfaces of the fixed limiting shell.

[0011] Through the above technical solution, multiple rolling steel balls play a supporting role in the rotation of the double-layer adjusting screw sleeve.

[0012] Furthermore, a through hole corresponding to the two U-shaped support steel plates is opened at the center of the support base plate, and the two U-shaped support steel plates are symmetrically arranged.

[0013] Through the above technical solution, the through hole facilitates the subsequent detection drive mechanism to drive the detection mechanism and the extrusion detection component to detect the roadbed.

[0014] Furthermore, the detection drive mechanism includes a connecting top plate fixedly connected between two U-shaped supporting steel plates, a hydraulic cylinder is fixedly connected to the top center of the connecting top plate, an extrusion push plate is fixedly connected to the output end of the hydraulic cylinder, connecting oil pipes are installed on the top and bottom of one side of the hydraulic cylinder, and a drive control device is installed at the rear end of the top of the supporting bottom plate at the end away from the hydraulic cylinder.

[0015] Through the above technical solution, the drive control device is started, and the hydraulic cylinder begins to push the extrusion push plate by circulating hydraulic oil, and the extrusion push plate is used to better contact the pressure sensor.

[0016] Furthermore, the adjustment and positioning mechanism includes a top fixed plate fixedly connected to the top of the front end surface of the U-shaped supporting steel plate and a bottom rotating sleeve fixedly connected to the top of the supporting bottom plate, a second stud is rotatably connected between the top fixed plate and the bottom rotating sleeve, a fixing convex plate is fixedly connected to the top of the second stud, one end of the fixing convex plate is spirally connected to a locking stud, the outer wall of the second stud is spirally connected to a supporting pad, and one side of the support pad is fixedly connected to a first pointer.

[0017] Through the above technical solution, after adjusting the levelness of the equipment, observe the scale line on the U-shaped support steel plate, rotate the fixed protrusion plate according to the position of the second pointer, and then drive the second stud to rotate between the top fixed plate and the bottom rotating sleeve, thereby driving the support pad and the first pointer to move up and down until the distance between the first pointer and the second pointer reaches the set value.

[0018] Furthermore, the detection mechanism includes a hollow square tube slidingly connected between two U-shaped supporting steel plates, the inner wall of the hollow square tube is fixedly connected with horizontal and vertical reinforcement plates, the bottom of both sides of the hollow square tube is fixedly connected with a second pointer, a pressure sensor is installed at the top center of the hollow square tube, the front end of the pressure sensor is electrically connected to a first wire, and a data display device is installed at the end of the first wire away from the pressure sensor, the bottom center of the hollow square tube is fixedly connected with a bottom connecting block, and the center of the bottom connecting block is slidingly connected with a pin.

[0019] Through the above technical solution, the extrusion push plate slowly contacts the pressure sensor until it pushes the hollow square tube so that it passes through the bottom connecting block to push the initial pressure column to extrude the roadbed surface, until the bottom two sides of the hollow square tube contact the two supporting pads, which means that the initial pressure column has dropped to the set value distance. In this process, the value of the pressure sensor gradually increases from zero, and then the data is transmitted to the inside of the data display device through the first wire, and displayed in a line graph through the data display device. During the continuous pushing of the hydraulic cylinder, two processes will occur. The first section: the initial pressure column extrude the roadbed; the second section: the hollow square tube contacts the supporting pad. In the first section of the process, the line graph of the value change sensed by the pressure sensor is not uniform. When it reaches the second section, the pressure change line graph begins to grow linearly. At this time, the drive control device can be turned off to stop working. The maximum pressure value when it becomes a linear image is the measured value.

[0020] Furthermore, the squeeze detection assembly includes an initial pressure column or an extended pressure column installed between the bottom connecting block and the latch.

[0021] Through the above technical solution, during the inspection, the initial pressure column can be used as the inspection column to test multiple sampling points, and then the extended pressure column can be replaced to conduct multiple inspections to observe the approximate changes in the data. The maximum pressure generated by the initial pressure column and the extended pressure column after moving a fixed distance is proportional to the area of ​​their bottom. By analyzing and comparing multiple sets of data, the inspection results of the roadbed can be analyzed.

[0022] Furthermore, both of the U-shaped support steel plates are provided with bar-shaped through holes corresponding to the support pad and the second pointer.

[0023] Through the above technical solution, the strip-shaped through hole can limit the supporting pad, and at the same time can also enable the second pointer to extend to the scale line to display the bottom position of the hollow square tube.

[0024] Furthermore, a hydraulic drive switch is installed at the rear end of the support pad, and a second wire is electrically connected between the hydraulic drive switch and the drive control device.

[0025] Through the above technical solution, the initial pressure column squeezes the roadbed. When the hollow square tube contacts the support pad, it will touch the hydraulic drive switch, and then transmit the control command to the drive control device through the second wire, and then stop driving. At this time, the final value displayed in the data display device is the maximum pressure value. This method is more convenient, but it requires the addition of an additional hydraulic drive switch.

[0026] The beneficial effects of the present invention are as follows: (1) The present invention designs a detection drive mechanism, an adjustment and positioning mechanism and a detection mechanism. The detection drive mechanism drives the detection mechanism, compresses a specific distance on the roadbed by squeezing the detection component, and transmits the pressure data in real time. The adjustment and positioning mechanism can ensure that the distance of each movement is equal. When the specific distance is reached, the maximum pressure can be obtained. The roadbed strength can be judged by measuring the maximum pressure by squeezing the roadbed for a specific distance. If the roadbed compaction degree is large, the final maximum pressure of the squeezed roadbed will also be large. A maximum pressure comparison value can be determined according to the standard roadbed. If it is greater than the comparison value, the roadbed is qualified. If it is less than the comparison value, it is unqualified and needs to be further compacted. The detection accuracy range of this method is high, the measurement is more accurate, and multiple measurements can be made on the roadbed in real time; (2) The present invention designs a horizontal level, a vertical level and an adjustable moving mechanism. It can ensure the horizontal state of the entire equipment according to different roadbeds, avoid the squeezing detection component contacting the ground at a certain angle, because when an angle occurs, the equal distance compression does not reach the expected depth, which will cause the detection pressure result to become smaller, thereby ensuring the accuracy of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 It is a partial structural schematic diagram of the present invention;

[0029] Figure 3 This is a schematic diagram of the exploded structure of the adjustable moving mechanism of the present invention;

[0030] Figure 4 1 is a schematic diagram of the cross-sectional structure of the adjustable moving mechanism of the present invention;

[0031] Figure 5 yes Figure 4 A partial enlarged view of point A in the middle;

[0032] Figure 6 It is a partial structural schematic diagram of the present invention;

[0033] Figure 7 This is a schematic diagram of the U-shaped support steel plate structure of the present invention;

[0034] Figure 8 This is a schematic structural diagram of the adjustment and positioning mechanism of Example 1 of the present invention;

[0035] Figure 9 This is a schematic diagram of the connection structure of the second embodiment of the present invention and the adjustment and positioning mechanism;

[0036] Figure 10 It is a schematic structural diagram of the detection mechanism of the present invention;

[0037] Figure 11 This is a schematic diagram of the distribution structure of the transverse and longitudinal reinforcement plates of the present invention;

[0038] Figure 12 It is a schematic diagram of the extended pressure column structure of the present invention;

[0039] Figure 13 It is a schematic structural diagram of the bottom connecting block of the present invention.

[0040] Figure numerals: 1. Support base plate; 2. Adjustable movable mechanism; 201. Arc-shaped protective shell; 202. Fixed limiting shell; 203. Sliding supporting shell; 204. U-shaped support plate; 205. Connecting bearing; 206. Support roller; 207. Double-layer limiting cylinder; 208. First threaded column; 209. Double-layer adjusting screw sleeve; 210. Rolling steel ball; 3. Counterweight; 4. Horizontal level; 5. Vertical level; 6. U-shaped support steel plate; 7. Scale line; 8. Detection drive mechanism; 801. Connecting top plate; 802. Hydraulic cylinder; 803. Extrusion push plate; 804. Connecting oil pipe; 805. Drive control device ;9. Adjustment and positioning mechanism;901. Top fixed plate;902. Bottom rotating sleeve;903. Second stud;904. Fixed convex plate;905. Locking stud;906. Support pad;907. First pointer;10. Detection mechanism;1001. Hollow square tube;1002. Horizontal and vertical reinforcement plates;1003. Second pointer;1004. Pressure sensor;1005. First wire;1006. Data display device;1007. Bottom connecting block;1008. Pin;11. Extrusion detection assembly;1101. Initial pressure column;1102. Extended pressure column;12. Hydraulic drive switch;13. Second wire. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0042] Example 1:

[0043] like Figure 1-5As shown, a railway roadbed strength testing device of this embodiment includes a supporting base plate 1, each corner of the top of the supporting base plate 1 is fixedly connected to an adjustable movable mechanism 2, the adjustable movable mechanism 2 includes an arc-shaped protective shell 201 fixedly connected to the top of the supporting base plate 1, the top of the arc-shaped protective shell 201 is fixedly connected to a fixed limiting shell sleeve 202, the inner wall of the fixed limiting shell sleeve 202 is slidably connected to a sliding supporting shell sleeve 203, the bottom of the sliding supporting shell sleeve 203 is fixedly connected to a U-shaped supporting plate 204, and the U-shaped supporting plate 204 is fixedly connected to the U-shaped supporting plate 204. The front and rear ends of the bottom of the support plate 204 are both equipped with connecting bearings 205, and a supporting roller 206 is installed between the two connecting bearings 205. The top of the sliding support shell 203 is fixedly connected with a double-layer limiting cylinder 207, and the top of the double-layer limiting cylinder 207 is fixedly connected with a first threaded column 208. The outer wall of the first threaded column 208 is spirally connected with a double-layer adjusting screw sleeve 209. A plurality of rolling steel balls 210 are installed between the two sides of the double-layer adjusting screw sleeve 209 and the top of the fixed limiting shell 202 to observe the horizontal level. The adjustable movable mechanism 2 is adjusted according to the degree of horizontal deviation, and the double-layer adjusting screw sleeve 209 is rotated during adjustment. Then, as the double-layer adjusting screw sleeve 209 rotates, the first threaded column 208 starts to drive the double-layer limiting cylinder 207 and the sliding support shell 203 to complete the rise and fall, and then the rise and fall of the support roller 206 can be completed through the U-shaped support plate 204, and the position adjustment of the support point of the support roller 206 is realized, and the horizontal adjustment of the entire equipment is completed until Observation shows that the horizontal level 4 and the vertical level 5 are within the appropriate horizontal range. The cross-sections of the double-layer limit cylinder 207 and the double-layer adjustment screw sleeve 209 are both I-shaped structures, and multiple rolling steel balls 210 are distributed between the two top surfaces of the fixed limit shell 202. The multiple rolling steel balls 210 support the rotation of the double-layer adjustment screw sleeve 209. Counterweights 3 are installed on both sides of the top of the support base plate 1, and the horizontal level 4 and the vertical level 5 are installed on the front end and one side of the top of the support base plate 1 respectively.

[0044] like Figure 6 and 7As shown, both sides of the top center of the support base plate 1 are fixedly connected with U-shaped support steel plates 6. A through hole corresponding to the two U-shaped support steel plates 6 is opened in the center of the support base plate 1, and the two U-shaped support steel plates 6 are symmetrically arranged. The through hole facilitates the subsequent detection drive mechanism 8 to drive the detection mechanism 10 and the extrusion detection component 11 to detect the roadbed. The two U-shaped support steel plates 6 are provided with scale lines 7 on the side away from each other. A detection drive mechanism 8 is fixedly connected between the tops of the two U-shaped support steel plates 6. The detection drive mechanism 8 includes a fixed connection between the two U-shaped support steel plates 6. The top plate 801 is connected to a hydraulic cylinder 802 fixedly connected to the top center of the top plate 801, and the output end of the hydraulic cylinder 802 is fixedly connected to an extrusion push plate 803. Connecting oil pipes 804 are installed on the top and bottom of one side of the hydraulic cylinder 802. The two connecting oil pipes 804 are installed with a drive control device 805 at the rear end of the top of the supporting base plate 1 at one end away from the hydraulic cylinder 802. When the drive control device 805 is started, the hydraulic cylinder 802 starts to push the extrusion push plate 803 by circulating hydraulic oil. The extrusion push plate 803 is used to better contact the pressure sensor 1004.

[0045] like Figure 8-13As shown, the front ends of the two U-shaped support steel plates 6 are fixedly connected with an adjustment and positioning mechanism 9, which includes a top fixed plate 901 fixedly connected to the top of the front end surface of the U-shaped support steel plate 6 and a bottom rotating sleeve 902 fixedly connected to the top of the support base plate 1. A second stud 903 is rotatably connected between the top fixed plate 901 and the bottom rotating sleeve 902. A fixing convex plate 904 is fixedly connected to the top of the second stud 903. A locking stud 905 is spirally connected to one end of the fixing convex plate 904. A supporting pad 906 is spirally connected to the outer wall of the second stud 903. A first pointer 907 is fixedly connected to one side of the supporting pad 906. After adjusting the levelness of the equipment, observe the engraved lines on the U-shaped support steel plate 6. Degree line 7, according to the position of the second pointer 1003, the fixed convex plate 904 is rotated, and the second stud 903 is driven to rotate between the top fixed plate 901 and the bottom rotating sleeve 902, so as to drive the support pad 906 and the first pointer 907 to move up and down until the distance between the first pointer 907 and the second pointer 1003 reaches the set value. A detection mechanism 10 is slidably connected between the two U-shaped support steel plates 6. The detection mechanism 10 includes a hollow square tube 1001 slidably connected between the two U-shaped support steel plates 6. The inner wall of the hollow square tube 1001 is fixedly connected with a horizontal and vertical reinforcement plate 1002. The bottom of both sides of the hollow square tube 1001 is fixedly connected with the second pointer 1003. The hollow square tube 1001 A pressure sensor 1004 is installed at the top center of the hollow square tube 1001. The front end of the pressure sensor 1004 is electrically connected to a first wire 1005. A data display device 1006 is installed at the end of the first wire 1005 away from the pressure sensor 1004. A bottom connecting block 1007 is fixedly connected to the bottom center of the hollow square tube 1001. A latch 1008 is slidably connected to the center of the bottom connecting block 1007. The push plate 803 is squeezed and slowly contacts the pressure sensor 1004 until the hollow square tube 1001 is pushed through the bottom connecting block 1007 to push the initial The pressure column 1101 squeezes the roadbed surface until the bottom sides of the hollow square tube 1001 touch the two support pads 906, indicating that the initial pressure column 1101 has dropped to the set distance. During this process, the value of the pressure sensor 1004 gradually increases from zero, and the data is then transmitted to the data display device 1006 through the first wire 1005 and displayed as a broken line graph on the data display device 1006. During the continuous pushing of the hydraulic cylinder 802, two processes will occur. The first stage: the initial pressure column 1101 squeezes the roadbed;Second stage: Hollow square tube 1001 contacts support pad 906. During the first stage, the pressure change line graph sensed by pressure sensor 1004 is not uniform (due to the continuous compression of the underlying roadbed). In the second stage, the pressure change line graph begins to increase linearly. At this point, the drive control device 805 can be shut down and stopped. The maximum pressure value when the graph becomes linear is the measured value. (Throughout this process, the maximum pressure sensor value plus the weight of the entire detection mechanism 10 of the data display device 1006 is the real-time pressure data. However, the gravity value of the detection mechanism 10 can be ignored during measurement, and the standard pressure value for standard strength roadbed testing also needs to be removed.)

[0046] like Figure 8-13 As shown, an extrusion detection component 11 is installed at the bottom of the detection mechanism 10, and the extrusion detection component 11 includes an initial pressure column 1101 or an extended pressure column 1102 installed between the bottom connecting block 1007 and the pin 1008. During the detection, the initial pressure column 1101 can be used as the detection column to test multiple sampling points, and then the extended pressure column 1102 can be replaced to perform multiple detections to observe the approximate changes in the data. The maximum pressure generated by the initial pressure column 1101 and the extended pressure column 1102 after moving a fixed distance is proportional to the area of ​​their bottom. The detection results of the roadbed can be analyzed and compared by analyzing and comparing multiple groups of data. The two U-shaped support steel plates 6 are provided with strip through holes corresponding to the support pad 906 and the second pointer 1003. The strip through holes can limit the support pad 906, and can also make the second pointer 1003 extend to display the bottom position of the hollow square tube 1001 on the scale line 7.

[0047] Example 2:

[0048] like Figure 9 As shown, the difference from Example 1 is that a hydraulic drive switch 12 is also installed at the rear end of the support pad 906, and a second wire 13 is electrically connected between the hydraulic drive switch 12 and the drive control device 805. The initial pressure column 1101 squeezes the roadbed. When the hollow square tube 1001 contacts the support pad 906, it touches the hydraulic drive switch 12, and then transmits the control command to the drive control device 805 through the second wire 13, and then stops driving. At this time, the final value displayed in the data display device 1006 is the maximum pressure value. This method is more convenient, but it requires the addition of an additional hydraulic drive switch 12.

[0049] The working principle of this embodiment is as follows: when in use, the detection points are equidistantly selected according to the roadbed, the whole device is pulled on the roadbed, and is placed according to the selected detection points. Before use, the hollow square tube 1001 is lifted, and the initial pressure column 1101 is installed inside from one side of the bottom connection block 1007, and then the latch 1008 is inserted to complete the fixation, so that the whole detection mechanism 10 and the initial pressure column 1101 fall naturally, and the bottom of the initial pressure column 1101 contacts the roadbed, and then the horizontal level 4 and the vertical level 5 are observed, and according to the degree of horizontal deviation, the initial pressure column 1101 is adjusted. To adjust the corresponding adjustable moving mechanism 2, the double-layer adjusting screw sleeve 209 is rotated during adjustment, and then as the double-layer adjusting screw sleeve 209 rotates, the first threaded column 208 begins to drive the double-layer limiting cylinder 207 and the sliding support shell 203 to complete the rise and fall, and then the rise and fall of the support roller 206 can be completed through the U-shaped support plate 204, realizing the position adjustment of the support point of the support roller 206, completing the level adjustment of the entire equipment, until the horizontal level 4 and the vertical level 5 are observed to be within the appropriate level range;

[0050] Then observe the scale line 7 on the U-shaped support steel plate 6, rotate the fixed convex plate 904 according to the position of the second pointer 1003, and then drive the second stud 903 to rotate between the top fixed plate 901 and the bottom rotating sleeve 902, so as to drive the support pad 906 and the first pointer 907 to move up and down until the distance between the first pointer 907 and the second pointer 1003 reaches the set value, and then rotate the locking stud 905 so that its bottom squeezes the top fixed plate 901 to complete the fixing and locking, and finally start the drive control device 805, and start to circulate hydraulic oil to make the hydraulic cylinder 802 start to push The push plate 803 is squeezed to slowly contact the pressure sensor 1004 until the hollow square tube 1001 is pushed through the bottom connecting block 1007 to push the initial pressure column 1101 to squeeze the roadbed surface until the bottom sides of the hollow square tube 1001 contact the two supporting pads 906, indicating that the initial pressure column 1101 has dropped to the set distance. During this process, the value of the pressure sensor 1004 gradually increases from zero, and the data is then transmitted to the data display device 1006 through the first wire 1005 and displayed as a line graph on the data display device 1006;

[0051] In the first embodiment, during the continuous pushing of the hydraulic cylinder 802, two processes will occur. The first stage: the initial pressure column 1101 squeezes the roadbed, and the second stage: the hollow square tube 1001 contacts the support pad 906. During the first stage of the process, the numerical value change line graph sensed by the pressure sensor 1004 does not change uniformly (because the bottom roadbed is constantly compressed). In the second stage, the pressure change line graph begins to grow linearly. At this time, the drive control device 805 can be turned off to stop working. The maximum pressure value when it becomes a linear image is the measured value. In the second embodiment, the initial pressure column 1101 squeezes the roadbed When the hollow square tube 1001 contacts the support pad 906, it will touch the hydraulic drive switch 12, and then transmit the control command to the drive control device 805 through the second wire 13, and then stop driving. At this time, the final value displayed in the data display device 1006 is the maximum pressure value. By squeezing the roadbed for a specific distance to measure the maximum pressure, the roadbed strength can be judged. If the roadbed compaction is greater, the final maximum pressure of squeezing the roadbed will be greater. A maximum pressure comparison value can be determined based on the standard roadbed. If it is greater than the comparison value, the roadbed is qualified, and if it is less than the comparison value, it is unqualified and needs to be further compacted.

[0052] During the inspection, the initial pressure column 1101 can be used as the inspection column to test multiple sampling points, and then the extended pressure column 1102 can be replaced to conduct multiple inspections to observe the approximate changes in the data. The maximum pressure generated by the initial pressure column 1101 and the extended pressure column 1102 after moving a fixed distance is proportional to the area of ​​their bottom (such as if the ratio of the contact area between the bottom of the initial pressure column 1101 and the extended pressure column 1102 and the roadbed is 1:2, then the ratio of the maximum pressure generated is also approximately equal to 1:2). By analyzing and comparing multiple sets of data, the inspection results of the roadbed can be determined.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A railway roadbed strength testing device, comprising a supporting base plate (1), characterized in that: Each corner of the top of the support base plate (1) is fixedly connected to an adjustable movable mechanism (2), the adjustable movable mechanism (2) comprising an arc-shaped protective shell (201) fixedly connected to the top of the support base plate (1), the top of the arc-shaped protective shell (201) is fixedly connected to a fixed limiting shell sleeve (202), the inner wall of the fixed limiting shell sleeve (202) is slidably connected to a sliding supporting shell sleeve (203), the bottom of the sliding supporting shell sleeve (203) is fixedly connected to a U-shaped supporting plate (204), the front and rear ends of the bottom of the U-shaped supporting plate (204) are both installed with connecting bearings (205), a supporting roller (206) is installed between the two connecting bearings (205), the top of the sliding supporting shell sleeve (203) is fixedly connected to a double-layer limiting shell sleeve (203), and the bottom of the U-shaped supporting plate (204) is fixedly connected to a U-shaped supporting plate (204). A cylinder (207), the top of the double-layer limiting cylinder (207) is fixedly connected to a first threaded column (208), the outer wall of the first threaded column (208) is spirally connected to a double-layer adjusting screw sleeve (209), a plurality of rolling steel balls (210) are installed between the two sides of the double-layer adjusting screw sleeve (209) and the top of the fixed limiting shell (202), the cross-sections of the double-layer limiting cylinder (207) and the double-layer adjusting screw sleeve (209) are both I-shaped structures, and the plurality of rolling steel balls (210) are respectively distributed between the two sides of the top of the fixed limiting shell (202), counterweight blocks (3) are installed on both sides of the top of the support base plate (1), and a horizontal level (4) and a vertical level (5) are respectively installed at the front end and one side of the top of the support base plate (1); Both sides of the center of the top of the support base plate (1) are fixedly connected with U-shaped support steel plates (6), the center of the support base plate (1) is provided with through holes corresponding to the two U-shaped support steel plates (6), and the two U-shaped support steel plates (6) are symmetrically arranged, and the two U-shaped support steel plates (6) are provided with scale lines (7) on the sides away from each other, and a detection drive mechanism (8) is fixedly connected between the tops of the two U-shaped support steel plates (6), and the detection drive mechanism (8) includes a connecting top plate (801) fixedly connected between the two U-shaped support steel plates (6), a hydraulic cylinder (802) is fixedly connected to the top center of the connecting top plate (801), an extrusion push plate (803) is fixedly connected to the output end of the hydraulic cylinder (802), and a connecting oil pipe (804) is installed on the top and bottom of one side of the hydraulic cylinder (802), and a drive control device (805) is installed at the rear end of the top of the support base plate (1) at one end away from the hydraulic cylinder (802); The front ends of the two U-shaped support steel plates (6) are fixedly connected to an adjustment and positioning mechanism (9), the adjustment and positioning mechanism (9) comprising a top fixed plate (901) fixedly connected to the top of the front end of the U-shaped support steel plate (6) and a bottom rotating sleeve (902) fixedly connected to the top of the support bottom plate (1), a second stud (903) is rotatably connected between the top fixed plate (901) and the bottom rotating sleeve (902), a fixing convex plate (904) is fixedly connected to the top of the second stud (903), one end of the fixing convex plate (904) is spirally connected to a locking stud (905), an outer wall of the second stud (903) is spirally connected to a support pad (906), one side of the support pad (906) is fixedly connected to a first pointer (907), a detection mechanism (10) is slidably connected between the two U-shaped support steel plates (6), and an extrusion detection assembly (11) is installed at the bottom of the detection mechanism (10).

2. The railway subgrade strength testing equipment according to claim 1, characterized in that: The detection mechanism (10) comprises a hollow square tube (1001) slidably connected between two U-shaped supporting steel plates (6), the inner wall of the hollow square tube (1001) is fixedly connected with a transverse and longitudinal reinforcing plate (1002), the bottoms of both sides of the hollow square tube (1001) are fixedly connected with a second pointer (1003), a pressure sensor (1004) is installed at the top center of the hollow square tube (1001), the front end of the pressure sensor (1004) is electrically connected with a first wire (1005), and a data display device (1006) is installed at the end of the first wire (1005) away from the pressure sensor (1004), the bottom center of the hollow square tube (1001) is fixedly connected with a bottom connecting block (1007), and the center of the bottom connecting block (1007) is slidably connected with a pin (1008).

3. The railway subgrade strength testing equipment according to claim 2, characterized in that: The squeeze detection assembly (11) comprises an initial pressure column (1101) or an extended pressure column (1102) installed between a bottom connection block (1007) and a latch (1008).

4. The railway subgrade strength testing equipment according to claim 2, characterized in that: The two U-shaped support steel plates (6) are both provided with strip-shaped through holes corresponding to the support pad (906) and the second pointer (1003).

5. The railway subgrade strength testing equipment according to claim 1, characterized in that: A hydraulic drive switch (12) is also installed at the rear end of the support pad (906), and a second wire (13) is electrically connected between the hydraulic drive switch (12) and the drive control device (805).

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