Calibrating device for geometric parameter measuring instrument of overhead line system
Through the combined structure of the inclined plate and the guide frame and the motor-driven screw mechanism, the high-precision simulated contact line and rail height adjustment of the contact network geometric parameter measuring instrument verification is achieved, which solves the problems of insufficient accuracy and cumbersome operation of the existing devices, and improves the accuracy and efficiency of the verification.
Patent Information
- Application Number
- CN202510396896.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2025-08-01
AI Technical Summary
The existing contact network geometric parameter measuring instrument verification device has insufficient accuracy when simulating contact line height adjustment, and the simulated rail height adjustment operation is cumbersome and inefficient, which cannot meet the high-precision requirements of high-speed railways.
The combined structure of the inclined plate and the guide frame is adopted, combined with the adjustment mechanism of the movable frame and the stud nut, to achieve rapid and accurate adjustment of the height of the simulated contact line; through the combination of the motor-driven screw and inclined block and the rotating roller, to achieve easy and stable adjustment of the height of the simulated rail.
It improves the accuracy and efficiency of the geometric parameter measuring instrument verification of contact network, meets the high-precision needs of high-speed railways, and reduces operational difficulty and errors.
Smart Images
Figure CN120403524A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of metrological verification devices, and specifically to a verification device for measuring the geometric parameters of an overhead catenary system. Background Art
[0002] In a modern electrified railway system, as an important facility for supplying power to electric locomotives, the accuracy of the geometric parameters of the overhead catenary system plays a decisive role in ensuring the safety and stability of railway operation. The measuring instrument for the geometric parameters of the overhead catenary system is a key device to ensure the accurate measurement of these parameters, and the verification device is a necessary tool to ensure the accuracy of the measuring instrument. With the continuous improvement of railway transportation speed and the continuous increase of transportation density, the accuracy requirements for measuring the geometric parameters of the overhead catenary system are becoming increasingly strict, which also makes the importance of the verification device for the measuring instrument for the geometric parameters of the overhead catenary system more prominent. Against this background, the research and development of efficient and accurate verification devices have become the research focus and development trend in the industry.
[0003] Currently, most of the existing verification devices for measuring the geometric parameters of the overhead catenary system on the market adopt relatively traditional mechanical structures and adjustment methods. In terms of simulating the height adjustment of the contact wire, a common method is to adjust the height through the simple cooperation of a slider and a track. When simulating the height adjustment of the rail, a split structure is mostly adopted, and different thickness pads are manually added to simulate the height difference. These traditional mechanical technologies and structural principles can, to a certain extent, meet the basic verification requirements. For example, in some railway branch line scenarios with low accuracy requirements and slow operating speeds, such devices can roughly complete the verification work of the measuring instrument.
[0004] However, combined with the beneficial effects of the above-mentioned new verification devices, it can be clearly found that there are many problems in the existing technology. In actual application scenarios, such as the verification work of the measuring instrument for the overhead catenary system on high-speed railway main lines, the obvious deficiencies of the traditional method for simulating the height adjustment of the contact wire are exposed. Due to its limited adjustment accuracy, it is impossible to accurately simulate the complex and highly variable contact wire height with high-precision requirements of the overhead catenary system on high-speed railways, because the simple slider and bolt fixing method is difficult to achieve fine adjustment, and it is easy to cause adjustment deviation with a little carelessness, unable to meet the high-precision requirements of the measuring instrument for the overhead catenary system on high-speed railways. In terms of simulating the height adjustment of the rail, the traditional method of manually adding pads is extremely cumbersome, and in scenarios such as large railway hubs where height simulation adjustment needs to be frequently carried out, the manual operation efficiency is low, and the accuracy of the pad placement position is greatly affected by human factors, and it is very easy to generate large errors, unable to provide a reliable simulated rail height difference environment for the measuring instrument, seriously affecting the accuracy and efficiency of the verification work of the measuring instrument for the geometric parameters of the overhead catenary system. Therefore, the present invention provides a verification device for measuring the geometric parameters of the overhead catenary system to solve the deficiencies existing in the existing technology. Summary of the Invention
[0005] Aiming at the deficiencies of the prior art, the present invention provides a calibration device for a catenary geometric parameter measuring instrument, which solves the problems that the adjustment operation of the simulated contact wire in the existing catenary geometric parameter measuring instrument calibration device is too monotonous and the height lift of the rail is not accurate enough.
[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A calibration device for a catenary geometric parameter measuring instrument, including a pillar and a base. Two connecting plates I and two connecting plates II are respectively fixedly connected to the outer side of the pillar. The connecting plate II is located above the connecting plate I. A bevel plate is fixedly connected to the adjacent sides of the connecting plate I and the connecting plate II. A guiding frame is fixedly connected to the outer side of the bevel plate. A plurality of adjusting mechanisms are arranged outside the bevel plate and the guiding frame. A lifting mechanism is arranged on the top of the base, and the lifting mechanism is used to simulate the height difference of the rail.
[0007] Preferably, the adjusting mechanism includes two movable frames and a simulated contact wire. The movable frame is sleeved outside the bevel plate and the guiding frame. The two ends of the simulated contact wire are respectively fixedly connected to the outer sides of the two movable frames. A slot is opened inside the movable frame, and the inner wall of the slot is slidably connected to the outer sides of the bevel plate and the guiding frame.
[0008] Preferably, two groups of mounting holes are opened inside the movable frame, and the number of each group of mounting holes is two. A stud is slidably connected inside one group of the mounting holes. A stop ring is sleeved outside the stud. The outer side of the stop ring is attached to the outer side of the movable frame. One end of the stud is threadedly connected to a nut, and the outer side of the nut is attached to the outer side of the movable frame. A strip-shaped hole is opened inside the guiding frame, and the stud is located inside the strip-shaped hole.
[0009] Preferably, a plurality of combined holes are opened inside the bevel plate. A pin is slidably connected inside the other group of mounting holes. The outer side of the pin is slidably connected to the inner side of one of the combined holes. A jack is opened at one end of the pin, and a limit pin is slidably connected inside the jack.
[0010] Preferably, the lifting mechanism includes a rail assembly and two lifting assemblies. The rail assembly includes four telescopic plates and a simulated track. The bottom end of the telescopic plate is rotatably connected to the top of the base, and the top end of the telescopic plate is rotatably connected to the outer side of the simulated track.
[0011] Preferably, four mounting bars are fixedly connected to the outer side of the simulated track. A rotating roller is rotatably connected between the two mounting bars, and the rotating roller is located on the top of the lifting assembly.
[0012] Preferably, the elevation component includes a limit seat and a mounting seat. The bottoms of the limit seat and the mounting seat are both fixedly connected to the top of the base. A motor is installed on the outer side of the limit seat, and the output end of the motor is fixedly connected to a lead screw. One end of the lead screw is rotatably connected to the outer side of the mounting seat.
[0013] Preferably, two threaded blocks are threadedly connected to the outer side of the lead screw. The outer sides of the threaded blocks are slidably connected to the inner side of the limit seat. The tops of the two threaded blocks are fixedly connected to an inclined plane block, and the outer side of the inclined plane block is in contact with the outer side of the rotating roller.
[0014] The present invention provides a calibration device for a catenary geometric parameter measuring instrument. It has the following beneficial effects:
[0015] 1. The present invention simulates the adjustment of the contact wire height and has two usage modes. In the coarse adjustment mode, by using the inclined plate and equidistant combination holes, and fixing the position of the movable frame through pins and limit pins, the height of the simulated contact wire can be quickly adjusted in units of a fixed distance, which is extremely efficient when a test environment needs to be quickly built with low precision requirements. In the fine adjustment mode, first remove the pins and loosen the stud nuts to make the movable frame slide freely for precise adjustment, and then tighten the stud nuts to increase the friction force by using the elasticity of the movable frame to stabilize the height, meeting the high-precision test requirements.
[0016] 2. The present invention simulates the adjustment of the rail height by driving the lead screw with a motor to make the threaded block move axially along the lead screw. The limit seat ensures the stable movement of the threaded block. The threaded block drives the inclined plane block, and its inclined plane is in rolling contact with the rotating roller. Compared with the traditional method of adding pads, the friction force is significantly reduced, making the lifting of the simulated track easier and more stable. The operator can precisely control the lifting height of the simulated track by controlling the motor, providing a reliable simulation environment for the calibration of the measuring instrument and improving the calibration accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a three-dimensional view of the present invention;
[0018] Figure 2 is Figure 1 the enlarged view at A in
[0019] Figure 3 is a schematic structural view of the movable frame of the present invention;
[0020] Figure 4 is a schematic structural view of the inclined plane block of the present invention.
[0021] Among them, 1. Support pillar; 2. First connecting plate; 3. Second connecting plate; 4. Oblique cutting plate; 5. Movable frame; 6. Simulated contact wire; 7. Slot hole; 8. Mounting hole; 9. Stud; 10. Nut; 11. Stop ring; 12. Plug pin; 13. Jack; 14. Limit pin; 15. Base; 16. Telescopic plate; 17. Simulated track; 18. Mounting strip; 19. Rotating roller; 20. Limit seat; 21. Motor; 22. Lead screw; 23. Mounting seat; 24. Threaded block; 25. Inclined plane block; 26. Guide frame; 27. Strip-shaped hole; 28. Combined hole. Specific implementation manner
[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0023] Please refer to the attached Figure 1 - attached Figure 4, an embodiment of the present invention provides a calibration device for a contact network geometric parameter measuring instrument, including a pillar 1 and a base 15, wherein two connecting plates 1 2 and two connecting plates 2 3 are fixedly connected to the outer side of the pillar 1, respectively, and the connecting plate 2 3 is located above the connecting plate 1 2, and the adjacent sides of the connecting plate 1 2 and the connecting plate 2 3 are fixedly connected with a bevel plate 4, and the outer side of the bevel plate 4 is fixedly connected with a guide frame 26, and multiple adjustment mechanisms are provided on the outside of the bevel plate 4 and the guide frame 26, and a lifting mechanism is provided on the top of the base 15, and the lifting mechanism is used to simulate the height difference of the rails. The design of the adjustment mechanism ingeniously realizes the diversified adjustment of the height of the simulated contact line 6 to meet different detection requirements, and the adjustment mechanism includes two movable frames 5 and a simulated contact line 6, and the movable frame 5 is sleeved on the bevel plate 4 and On the outside of the guide frame 26, the two ends of the simulated contact line 6 are fixedly connected to the outside of the two movable frames 5 respectively. A slot 7 is provided inside the movable frame 5. The inner wall of the slot 7 is slidably connected to the outside of the bevel plate 4 and the guide frame 26. Two groups of mounting holes 8 are provided inside the movable frame 5. The number of mounting holes 8 in each group is two. When coarse adjustment is required, the first adjustment mode is adopted. Without adding additional parts inside the movable frame 5, the inclined characteristics of the bevel plate 4 are utilized to push the movable frame 5 to slide along the bevel plate 4 and the guide frame 26. Since multiple combination holes 28 are equidistantly arranged, each time the movable frame 5 moves a fixed node, the pin 12 is passed through the mounting hole 8 and matched with the corresponding combination hole 28 to limit the height of the movable frame 5. Subsequently, the limit pin 1 is 4 is inserted into the socket 13, and the position of the movable frame 5 is stabilized by locking the latch 12. In this mode, the movable frame 5 drives the movement of the simulated contact line 6 in units of the distance between the two combination holes 28, which is suitable for scenes where the height accuracy requirement is relatively low but quick adjustment is required. A stud 9 is slidably connected to the inside of one group of mounting holes 8, and a stop ring 11 is sleeved on the outside of the stud 9. The outer side of the stop ring 11 fits with the outer side of the movable frame 5. A nut 10 is threadedly connected to one end of the stud 9, and the outer side of the nut 10 fits with the outer side of the movable frame 5. A strip hole 27 is provided inside the guide frame 26, and the stud 9 is located inside the strip hole 27. When it is necessary to fine-tune the height of the simulated contact line 6, the second adjustment mode is enabled, and the interior of the bevel plate 4 is provided with a There are multiple combination holes 28, and the interior of another group of mounting holes 8 is slidably connected with a latch 12. The outer side of the latch 12 is slidably connected to the inner side of one of the combination holes 28. A socket 13 is provided at one end of the latch 12. The interior of the socket 13 is slidably connected to a limit pin 14. First, remove the latch 12 from the interior of the movable frame 5 to release the height restriction on the movable frame 5. Then loosen the two groups of studs 9 and nuts 10. At this time, the movable frame 5 is free from the fastening constraint and can slide freely on the outside of the bevel plate 4 and the guide frame 26. The operator can make fine adjustments according to actual test requirements. When the required height is reached, tighten the studs 9 and nuts 10. Since the movable frame 5 has a certain elastic deformation ability, it will squeeze the outside of the bevel plate 4 and the guide frame 26 during the tightening process.The height of the movable frame 5 is stabilized by increasing the friction force, thereby realizing the precise adjustment of the height of the simulated contact wire 6; the lifting mechanism includes a rail assembly and two lifting assemblies. The rail assembly includes four telescopic plates 16 and a simulated track 17. The bottom end of the telescopic plate 16 is rotatably connected to the top of the base 15, and the top end of the telescopic plate 16 is rotatably connected to the outside of the simulated track 17. Four mounting bars 18 are fixedly connected to the outside of the simulated track 17. A rotating roller 19 is rotatably connected between two mounting bars 18. The rotating roller 19 is located on the top of the lifting assembly. The lifting assembly includes a limit seat 20 and a mounting seat 23. The bottoms of the limit seat 20 and the mounting seat 23 are both fixedly connected to the top of the base 15. A motor 21 is installed on the outside of the limit seat 20. The output end of the motor 21 is fixedly connected to a lead screw 22. One end of the lead screw 22 is rotatably connected to the outside of the mounting seat 23. Two threaded blocks 24 are threadedly connected to the outside of the lead screw 22. The outside of the threaded block 24 is slidably connected to the inside of the limit seat 20. The tops of the two threaded blocks 24 are fixedly connected to an inclined block 25. The outside of the inclined block 25 is in contact with the outside of the rotating roller 19. When it is necessary to simulate the height change on one side of the rail, the motor 21 at the corresponding position is started. The motor 21 serves as a power source, and its output end drives the lead screw 22 to rotate. The two threaded blocks 24 threadedly connected to the outside of the lead screw 22 will move along the axial direction of the lead screw 22 when the lead screw 22 rotates. Since the outside of the threaded block 24 is slidably connected to the inside of the limit seat 20, this ensures the stability and linearity of the movement of the threaded block 24. The inclined block 25 fixedly connected to the top of the threaded block 24 moves synchronously with the threaded block 24. The inclined surface of the inclined block 25 is in rolling contact with the rotating roller 19. This rolling contact method significantly reduces the friction force compared with sliding friction, making the simulated track 17 more relaxed and stable during the lifting process. Compared with the traditional method of adjusting the height of the simulated rail by adding pads through a split structure, the lifting mechanism of the present invention does not require manual handling and placement of pads, avoiding errors caused by inaccurate placement positions of the pads. It is not only more convenient to operate but also can achieve more precise height adjustment, providing a more reliable simulated rail height difference environment for the verification of the catenary geometric parameter measuring instrument.,
[0024] Specifically, when conducting the test of the contact network geometric parameter measuring instrument, the simulated contact line 6 height adjustment and simulated rail height simulation functions of this calibration device play a key role. For the simulated contact line 6 height adjustment, there are two flexible and practical adjustment modes. The first adjustment mode is to ensure that no additional parts are added to the movable frame 5 in the early preparation stage of the test. Since the bevel plate 4 is inclined, the movable frame 5 is pushed at this time. The movable frame 5 can slide smoothly along the bevel plate 4 and the guide frame 26 with the help of the inclined characteristics of the bevel plate 4. A plurality of equidistantly arranged combination holes 28 are provided inside the bevel plate 4. This design is the key to achieving highly accurate coarse adjustment. When the movable frame 5 slides along the bevel plate 4 to a fixed node position, the insert The pin 12 passes through one of the mounting holes 8 in a group of the interior of the movable frame 5 and is tightly matched with the corresponding combination hole 28, thereby limiting the position of the movable frame 5 on the bevel plate 4 and further limiting the height of the movable frame 5. In order to further ensure that the latch 12 does not accidentally loosen, the limit pin 14 is accurately inserted into the socket 13 opened at one end of the latch 12. In this way, the latch 12 is firmly locked and the position of the movable frame 5 is completely fixed. In this adjustment mode, the distance that the movable frame 5 drives the simulated contact line 6 to move is based on the distance between the two combination holes 28. Although this movement method based on a fixed distance is relatively limited in accuracy, it has a fast adjustment speed and is more suitable for some applications where the height accuracy requirements of the simulated contact line 6 are not particularly high, but more In scenarios that focus on quickly setting up a test environment, such as a preliminary measuring instrument function verification test, this adjustment mode can work efficiently and quickly adjust the simulated contact line 6 to approximately the required height; the second adjustment mode is suitable for test scenarios that have high-precision requirements on the height of the simulated contact line 6. Before starting the adjustment, first remove the pin 12 from the inside of the movable frame 5. This step removes the initial restriction of the pin 12 on the height of the movable frame 5. Then, loosen the two sets of studs 9 and nuts 10. The studs 9 pass through another set of mounting holes 8 of the movable frame 5 and are tightly connected to the movable frame 5 through the retaining ring 11 and the nut 10. The strip hole 27 of the guide frame 26 provides a track for the movement of the stud 9. When the stud 9 and the nut 10 are loosened, the movable The frame 5 is free from the fastening constraints of the studs 9 and nuts 10. At this time, the movable frame 5 can slide freely on the outside of the bevel plate 4 and the guide frame 26. The operator can push the movable frame 5 for fine movement based on the high-precision requirements of the actual test, relying on his own experience and test standards. When the movable frame 5 moves to the ideal height position, the reverse operation is started to tighten the studs 9 and nuts 10. Since the movable frame 5 itself has a certain elastic deformation ability, in the process of tightening the studs 9 and nuts 10, the movable frame 5 will produce a slight elastic deformation due to the fastening force of the studs 9 and nuts 10, and then squeeze the outside of the bevel plate 4 and the guide frame 26. This squeezing effect greatly increases the friction between the movable frame 5 and the bevel plate 4 and the guide frame 26.Enable the movable frame 5 to be stably maintained at the current height position, so as to achieve precise adjustment of the height of the simulated contact wire 6. In some professional tests with extremely high requirements for the measurement accuracy of catenary geometric parameters, such as the calibration test of a high-precision catenary measuring instrument, this fine adjustment mode can fully exert its advantages to ensure that the height of the simulated contact wire 6 matches the actual required height. When it is necessary to simulate the height change on one side of the rail, the operation process is simple and efficient. If it is necessary to raise the height of the left side of the simulated track 17, only need to start the motor 21 located on the left side. The motor 21 serves as the power source for the entire lifting process. After starting, its output end will rotate at a high speed, and then drive the lead screw 22 fixedly connected to it to rotate synchronously. There are two threaded blocks 24 threadedly connected to the outer side of the lead screw 22. When the lead screw 22 rotates, according to the principle of screw drive, the threaded block 24 will move along the axial direction of the lead screw 22. The presence of the limit seat 20 plays a key guiding and limiting role. The outer side of the threaded block 24 is slidably connected to the inner side of the limit seat 20. This design ensures the stability and linearity of the threaded block 24 during the movement process, avoiding the situation of shaking or deviation of the threaded block 24 during the movement process. The top of the threaded block 24 is fixedly connected with an inclined block 25. As the threaded block 24 moves, the inclined block 25 also moves synchronously. The inclined surface of the inclined block 25 is in rolling contact with the rotating roller 19 rotatably connected between the outer mounting strip 18 of the simulated track 17. This rolling contact method significantly reduces the frictional force compared with the traditional sliding friction method. In the traditional separated structure of the simulated rail, the height is usually adjusted by manually adding pads. Not only is the operation cumbersome, requiring manual handling and placing of pads, but also it is very difficult to ensure the accuracy of the pad placement position, and large errors are easily generated. However, the lifting mechanism of the present invention drives the lead screw 22 to rotate through the motor 21, drives the threaded block 24 and the inclined block 25 to move, and utilizes the rolling contact between the inclined block 25 and the rotating roller 19 to make the lifting process of the simulated track 17 easier and more stable. The operator can precisely control the lifting height of the simulated track 17 by controlling the start, stop and rotation direction of the motor 21, realizing precise simulation of the rail height difference, providing a more reliable simulated rail height difference environment for the calibration of the catenary geometric parameter measuring instrument, and greatly improving the accuracy and efficiency of the measuring instrument calibration work.,
[0025] Working principle: First, when conducting tests, the heights of each simulated contact wire 6 are different, and two adjustment modes can be adopted. In the first mode, no other parts are added inside the movable frame 5. Push the movable frame 5 to slide. The multiple combination holes 28 are equidistantly arranged. When moving a fixed node, the pin 12 can be passed through the mounting hole 8 and one of the combination holes 28 to limit the height of the movable frame 5. Then, insert the limit pin 14 into the jack 13 to lock the pin 12. This adjustment mode allows the movable frame 5 to drive the simulated contact wire 6 to move in units of the distance between two combination holes 28. In the second mode, the pin 12 can be first taken out from the inside of the movable frame 5, and then the two sets of studs 9 and nuts 10 are loosened. In this way, the movable frame 5 can be freely slid outside the inclined cutting plate 4 and the guiding frame 26, enabling fine adjustment to meet the test requirements. Finally, tighten the studs 9 and nuts 10 so that the movable frame 5 with elastic deformation presses against the outside of the inclined cutting plate 4 and the guiding frame 26, increasing the friction force to maintain the height of the movable frame 5. In addition, when it is necessary to simulate the height of the rail, when raising the height of one side of the simulated track 17, just start the motor 21 at the corresponding position to drive the lead screw 22 to rotate, so that the threaded block 24 drives the inclined block 25 to move. The rolling contact between the inclined surface of the inclined block 25 and the rotating roller 19 reduces the friction force, making the lifting of the simulated track 17 easier and more stable. Compared with the traditional separated structure of the simulated rail for adjusting the height by adding cushion blocks, it is more convenient and accurate.
[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. Catenary geometric parameter measuring instrument verification device, including a pillar and a base, characterized in that, On the outer sides of the said struts, two first connecting plates and two second connecting plates are fixedly connected respectively. The second connecting plates are located above the first connecting plates. On the adjacent sides of the first connecting plates and the second connecting plates, bevel cutting plates are fixedly connected. On the outer sides of the bevel cutting plates, guiding frames are fixedly connected. A plurality of adjusting mechanisms are arranged outside the bevel cutting plates and the guiding frames. On the top of the base, a lifting mechanism is arranged, and the lifting mechanism is used to simulate the height difference of the rail.
2. The catenary geometric parameter measuring instrument verification device according to claim 1, characterized in that The adjusting mechanism includes two movable frames and a simulated catenary. The movable frames are sleeved outside the bevel cutting plates and the guiding frames. The two ends of the simulated catenary are fixedly connected to the outer sides of the two movable frames respectively. Groove holes are formed inside the movable frames, and the inner walls of the groove holes are slidably connected to the outer sides of the bevel cutting plates and the guiding frames.
3. The catenary geometric parameter measuring instrument verification device according to claim 2, characterized in that, Two groups of mounting holes are formed inside the movable frames, and the number of each group of mounting holes is two. Inside one group of the mounting holes, a stud is slidably connected. A stop ring is sleeved outside the stud, and the outer side of the stop ring is attached to the outer side of the movable frame. One end of the stud is threadedly connected with a nut, and the outer side of the nut is attached to the outer side of the movable frame. A strip-shaped hole is formed inside the guiding frame, and the stud is located inside the strip-shaped hole.
4. The catenary geometric parameter measuring instrument calibration device according to claim 3, characterized in that, A plurality of combined holes are formed inside the bevel cutting plates. Inside the other group of mounting holes, a plug pin is slidably connected. The outer side of the plug pin is slidably connected to the inner side of one of the combined holes. A jack is formed at one end of the plug pin, and a limit pin is slidably connected inside the jack.
5. The verification device for the catenary geometric parameter measuring instrument according to claim 1, characterized in that The lifting mechanism includes a rail assembly and two lifting assemblies. The rail assembly includes four telescopic plates and a simulated track. The bottom ends of the telescopic plates are rotatably connected to the top of the base, and the top ends of the telescopic plates are rotatably connected to the outer side of the simulated track.
6. The catenary geometric parameter measuring instrument verification device according to claim 5, characterized in that, Four mounting bars are fixedly connected to the outer side of the simulated track. A rotating roller is rotatably connected between two of the mounting bars, and the rotating roller is located on the top of the lifting assembly.
7. The catenary geometric parameter measuring instrument verification device according to claim 6, characterized in that, The lifting assembly includes a limit seat and a mounting seat. The bottoms of the limit seat and the mounting seat are both fixedly connected to the top of the base. A motor is installed on the outer side of the limit seat, and the output end of the motor is fixedly connected with a lead screw. One end of the lead screw is rotatably connected to the outer side of the mounting seat.
8. The catenary geometric parameter measuring instrument verification device according to claim 7, characterized in that Two threaded blocks are threadedly connected to the outer side of the lead screw. The outer sides of the threaded blocks are slidably connected to the inner side of the limit seat. The tops of the two threaded blocks are fixedly connected with inclined plane blocks, and the outer sides of the inclined plane blocks are in contact with the outer sides of the rotating rollers.