A constant tension overhead line guide device for electrified railway catenary

Abstract

This invention discloses a constant tension overhead line guiding device for electrified railway catenary, relating to the field of railway catenary technology. It includes: a high-position mounting frame fixedly connected to a constant tension overhead line vehicle; a mounting plate fixed to the top of the high-position mounting frame; and multiple opposing guide components mounted on the mounting plate. It also includes: a support cylinder rotatably connected to the guide components; an adjusting arm slidably sleeved inside the support cylinder; and a monitoring unit connected to the support cylinder for detecting tilting of cables passing through the guide components. Through the monitoring unit, this invention can detect in real time whether the cables passing through the guide components are tilting. When the cable tilts, it generates a lateral force on the support cylinder, causing the adjusting arm to slide within the support cylinder. Furthermore, by controlling the action of the adjusting unit, the position of the adjusting arm, support cylinder, and guide components is adjusted, achieving real-time correction of the cable's direction.

Description

Technical Field

[0001] This invention relates to the field of railway catenary technology, specifically to a constant tension overhead line guide device for electrified railway catenary. Background Technology

[0002] In the installation of overhead contact lines for electrified railways, constant tension overhead line technology is one of the key aspects to ensure the quality of overhead contact line construction. Its core lies in ensuring that the cable maintains a set tension throughout the installation process to meet the dynamic performance requirements of the overhead contact line when trains are running at high speeds. As an important component of the constant tension overhead line system, the guiding device is mainly used to guide and limit the direction of the cable, ensuring that the cable can be laid out smoothly and orderly along the predetermined path.

[0003] For example, CN113594996A discloses a constant tension cable laying device for overhead contact lines, including a frame, a cable reel, a tension device, an infeed force measuring device, an outfeed force measuring device, and a controller. A drive device is located below the frame. The cable reel is mounted on the frame, and the cable to be laid is wound on the reel. An infeed brake is provided on the reel. The tension device is mounted on the frame and located away from one end of the cable reel. The tension device includes a tension frame mounted on the frame and two tension wheels mounted on the tension frame. An outfeed brake is provided on the tension wheels. The infeed force measuring device is located between the cable reel and the tension device and is used to measure the infeed tension of the cable. The outfeed force measuring device is located on the tension device and is used to measure the outfeed tension of the cable. The controller is used to control the infeed brake to clamp or loosen the cable reel and the outfeed brake to clamp or loosen the tension wheels according to the infeed tension and the outfeed tension. This patent can maintain a constant outfeed tension during use.

[0004] However, the guiding devices in the aforementioned patents have relatively simple structures, mostly consisting of fixed guide wheel assemblies. Their position adjustment often relies on manual operation, which not only has limited adjustment accuracy but also makes it difficult to respond in real time to positional deviations of the cable caused by factors such as tension fluctuations, terrain changes, or mechanical vibrations during the cable erection process. When the cable tilts or deviates on the guiding assembly, if it is not adjusted in time, it may lead to poor contact between the cable and the guide wheels, accelerating wear and even causing problems such as cable jumping out of the groove or twisting, affecting the smooth progress of cable erection and construction safety. Summary of the Invention

[0005] The purpose of this invention is to provide a constant tension overhead line guide device for electrified railway catenary to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a constant tension overhead line guiding device for electrified railway contact networks, comprising: A high-level mounting frame is fixedly connected to a constant tension overhead line vehicle. The top of the high-level mounting frame is fixed with a mounting plate, and the mounting plate is provided with multiple guide components arranged opposite to each other. Also includes: A support cylinder rotatably connected to the guide assembly, an adjusting arm slidably sleeved inside the support cylinder, a monitoring unit connected to the support cylinder for detecting tilting of the cable passing through the guide assembly, and an adjusting unit connected to one end of the adjusting arm for adjusting the position of the guide assembly; and, An oil hole is provided on the support cylinder and communicates with the adjusting arm; a lubrication unit for injecting oil into the oil hole is fixedly connected to the top of the mounting plate; and, A transmission unit located at the bottom of the lubrication unit and used to provide oil supply power is fixedly connected to the adjustment unit.

[0007] Preferably, the monitoring unit includes an annular plate that is fixedly sleeved with the adjusting arm. A pressure sensor is fixedly installed on one side of the annular plate. Both ends of the support cylinder are provided with elastic members, and one end of the elastic member is abutted against the signal input end of the pressure sensor.

[0008] Preferably, the elastic element includes an annular plate two fixedly connected to both ends of the support cylinder, a buffer airbag fixed to one side of the annular plate two, an abutment plate fixed to the end of the buffer airbag away from the annular plate two, and one side of the abutment plate abutting against the signal input end of the pressure sensor.

[0009] Preferably, the adjustment unit includes an arc-shaped plate fixedly connected to the end of the adjustment arm away from the support cylinder. Two arc-shaped plates are symmetrically arranged on the upper and lower sides. Threaded grooves are provided on the sides of the two arc-shaped plates that are close to each other. Threaded blocks are engaged in the threaded grooves. A driving member is provided at one end of the threaded block. A limit member is fixed at the end of the arc-shaped plate away from the adjustment arm.

[0010] Preferably, the driving component includes a servo motor fixedly connected to the outer wall of the mounting plate, a driving pulley fixedly attached to the output end of the servo motor, a driven pulley connected to the driving pulley via a synchronous belt drive, and one end of the central shaft of the driven pulley fixedly connected to the threaded block.

[0011] Preferably, the limiting member includes a baffle fixedly connected to the end of the arc-shaped plate away from the adjusting arm, with sliders fixed at both the upper and lower ends of the baffle, a guide rail slidably connected to the slider, a connecting plate fixed at the top of the guide rail, the connecting plate fixed to the outer wall of the mounting plate, the transmission unit fixed at the end of the baffle away from the arc-shaped plate, and the lubrication unit located above the transmission unit.

[0012] Preferably, the transmission unit includes a second connecting plate fixedly connected to the baffle, a convex plate fixed to the top of the second connecting plate, the convex plate having a plurality of corrugated protrusions on its top, and the convex plate being drively connected to the top end of the lubrication unit.

[0013] Preferably, the lubrication unit includes an oil box containing lubricating oil, a connecting plate three is fixed to the bottom of the oil box, the oil box is fixed to the top of the mounting plate through the connecting plate three, and an oil outlet is fixed to the bottom of the oil box.

[0014] Preferably, the oil outlet includes a cylindrical body fixedly connected to the bottom of the oil box, the top of the cylindrical body communicating with the oil box, a stop block fixed to the inner wall of the cylindrical body, an oil passage opened on the stop block, a sealing plate slidably connected to the upper side of the oil passage, a valve stem fixed to the bottom end of the sealing plate, the valve stem slidingly passing through the bottom of the cylindrical body, and a roller fixed to the bottom end of the valve stem, the roller making rolling friction contact with the convex plate, a return spring being provided between the roller and the cylindrical body, an oil injection pipe communicating with the bottom end of the cylindrical body, and the distal end of the oil injection pipe communicating with the oil hole.

[0015] Preferably, the output terminal of the pressure sensor is electrically connected to an external controller, and the controller is electrically connected to the regulating unit.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) By setting up a monitoring unit, the present invention can sense in real time whether the cable passing through the guide component is tilted. When the cable is tilted, it will generate a lateral force on the support cylinder, causing the adjusting arm to slide inside the support cylinder. Then, by controlling the action of the adjusting unit, the adjusting arm, the support cylinder and the guide component are adjusted in position, thereby realizing real-time correction of the cable direction. This effectively avoids problems such as poor contact, increased wear and even skipping or twisting caused by cable tilt.

[0017] (2) By setting up oil holes, lubrication units and transmission units, the present invention can perform intermittent lubrication synchronously with the adjustment action, which can ensure good lubrication between the support cylinder and the adjustment arm, reduce friction and wear, extend the service life of the device, and avoid the waste of lubricating oil, thus realizing intelligent lubrication management. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is a partial front view of the structure of the present invention; Figure 4 This is a side cross-sectional view of the monitoring unit of the present invention; Figure 5 This is a schematic diagram of the structure of the adjustment unit of the present invention; Figure 6 This is a schematic diagram of the lubrication unit and transmission unit of the present invention; Figure 7 This is a side cross-sectional view of the oil outlet component of the present invention.

[0019] In the diagram: 1. High-mounted mounting frame; 2. Mounting plate; 3. Guide assembly; 4. Support cylinder; 5. Adjusting arm; 6. Monitoring unit; 7. Adjusting unit; 8. Oil hole; 9. Lubrication unit; 10. Transmission unit; 11. Annular plate one; 12. Pressure sensor; 13. Elastic component; 14. Annular plate two; 15. Buffer airbag; 16. Abutment plate; 17. Arc plate; 18. Threaded groove; 19. Threaded block; 20. Driving component ; 21. Limiting component; 22. Servo motor; 23. Driving pulley; 24. Driven pulley; 25. Baffle; 26. Slider; 27. Guide rail; 28. Connecting plate one; 29. ​​Connecting plate two; 30. Protruding plate; 31. Oil box; 32. Connecting plate three; 33. Oil outlet component; 34. Cylinder; 35. Stop block; 36. Oil passage; 37. Sealing plate; 38. Valve stem; 39. Roller; 40. Return spring; 41. Oil injection pipe. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1-7 The figure shows a constant tension overhead line guide device for electrified railway catenary, comprising: a high-position mounting frame 1 fixedly connected to a constant tension overhead line vehicle, a mounting plate 2 fixedly mounted on the top of the high-position mounting frame 1, and a plurality of oppositely arranged guide components 3 on the mounting plate 2; a support cylinder 4 rotatably connected to the guide components 3, an adjusting arm 5 slidably sleeved inside the support cylinder 4, a monitoring unit 6 connected to the support cylinder 4 for detecting tilting of the cable passing through the guide components 3, an adjusting unit 7 for adjusting the position of the guide components 3 connected to one end of the adjusting arm 5; an oil hole 8 provided on the support cylinder 4 and communicating with the adjusting arm 5, a lubrication unit 9 fixedly connected to the top of the mounting plate 2 for injecting oil into the oil hole 8; and a transmission unit 10 provided at the bottom of the lubrication unit 9 for providing oil supply power, the transmission unit 10 being fixedly connected to the adjusting unit 7.

[0022] In this solution, after setting up the monitoring unit 6, the tilting status of the cable on the guide assembly 3 can be detected in real time. Once the cable tilts, a lateral force will be applied to the support cylinder 4, causing the adjusting arm 5 to slide inside the support cylinder 4. Then, with the help of the control and adjustment unit 7, the position of the adjusting arm 5, the support cylinder 4, and the guide assembly 3 will be adjusted, thereby correcting the cable direction in real time and effectively preventing poor contact, increased wear, and even skipping or twisting caused by cable tilting. Furthermore, with the help of the lubrication unit 9, the transmission unit 10, and the oil hole 8, intermittent lubrication synchronized with the adjustment action can be achieved. This not only ensures sufficient lubrication between the support cylinder 4 and the adjusting arm 5, reducing friction loss and extending equipment life, but also prevents excessive consumption of lubricating oil, achieving the effect of intelligent lubrication management.

[0023] It should be noted that the guide component 3 is a structure of multiple opposing rollers. The roller structure can ensure the cable exit angle. At the same time, the rotation shaft of the rollers and the support cylinder 4 are connected by high-precision bearings to ensure that the rollers rotate flexibly, further reducing the resistance when the cable passes through and ensuring the stability of the cable laying.

[0024] For further details, please refer to [link / reference]. Figure 2 and Figure 3 The monitoring unit 6 includes an annular plate 11 fixedly sleeved with the adjusting arm 5. A pressure sensor 12 is fixedly installed on one side of the annular plate 11. Both ends of the support cylinder 4 are provided with elastic members 13, and one end of the elastic member 13 is abutted against the signal input end of the pressure sensor 12.

[0025] The elastic element 13 includes an annular plate 14 fixedly connected to both ends of the support cylinder 4. A buffer airbag 15 is fixed to one side of the annular plate 14, and an abutment plate 16 is fixed to one end of the buffer airbag 15 away from the annular plate 14. One side of the abutment plate 16 is abutted against the signal input terminal of the pressure sensor 12. The output terminal of the pressure sensor 12 is electrically connected to an external controller (not labeled in the figure), and the controller is electrically connected to the adjustment unit 7.

[0026] In this design, when the cable tilts on the guide assembly 3, it generates a lateral thrust on the support cylinder 4. Since the support cylinder 4 is rotatably connected to the guide assembly 3, this lateral force causes the support cylinder 4 to have a slight tendency to slide relative to the adjusting arm 5. At this time, the annular plates 14 at both ends of the support cylinder 4 move accordingly, thereby squeezing or stretching the corresponding buffer airbags 15. The buffer airbags 15 are filled with gas and have good elasticity. When squeezed, their internal pressure increases, pushing the abutment plate 16 to apply pressure to the signal input end of the pressure sensor 12; when stretched, their internal pressure decreases, and the pressure of the abutment plate 16 on the signal input end of the pressure sensor 12 also decreases accordingly. The pressure sensor 12 can accurately sense this pressure change and convert the pressure signal into an electrical signal, transmitting it to the external controller. After receiving the pressure signal, the controller determines the direction and degree of cable tilt based on a preset threshold and algorithm, and then sends a corresponding control command to the adjusting unit 7, driving the adjusting unit 7 to act, thereby adjusting the position of the guide assembly 3 in real time and accurately to correct the cable offset. The buffer airbag 15 not only transmits pressure signals, but also acts as a buffer and shock absorber during the adjustment process, preventing rigid contact from damaging the pressure sensor 12 and other components, thus improving the stability and service life of the monitoring unit 6.

[0027] It should be noted that by presetting the internal air pressure of the buffer airbag 15 and calibrating the sensitivity of the pressure sensor 12, the tilt threshold can be accurately set under different cable specifications and tension conditions, ensuring that the monitoring unit 6 can work reliably under various working conditions. For example, for cables with thicker diameters and higher tension, the trigger threshold of the pressure sensor 12 can be appropriately increased to avoid misjudgment due to normal minor fluctuations; while for cables with thinner diameters and lower tension, the threshold can be lowered to more sensitively detect slight tilting trends. This adjustability allows the device to adapt to diverse cable-laying needs, improving its versatility and practicality.

[0028] For further details, please refer to [link / reference]. Figure 4 and Figure 5 The adjustment unit 7 includes an arc-shaped plate 17 fixedly connected to the end of the adjustment arm 5 away from the support cylinder 4. Two arc-shaped plates 17 are symmetrically arranged vertically. The two arc-shaped plates 17 are provided with threaded grooves 18 on their adjacent sides. Threaded blocks 19 are engaged in the threaded grooves 18. A driving member 20 is provided at one end of the threaded block 19. A limiting member 21 is fixed at the end of the arc-shaped plate 17 away from the adjustment arm 5.

[0029] The driving component 20 includes a servo motor 22 fixedly connected to the outer wall of the mounting plate 2. The output end of the servo motor 22 is fixedly equipped with a drive pulley 23. The drive pulley 23 is connected to a driven pulley 24 via a synchronous belt drive. One end of the central shaft of the driven pulley 24 is fixedly connected to the threaded block 19.

[0030] It should be noted that the drive component 20 provides a stable and precise power output to the adjustment unit 7. When the controller issues an adjustment command, the servo motor 22 starts, and its output drives the drive pulley 23 to rotate. The drive pulley 23 transmits power to the driven pulley 24 through a synchronous belt, and the central shaft of the driven pulley 24 rotates accordingly, thereby driving the threaded block 19 fixedly connected to it to rotate. Since the threaded block 19 meshes with the threaded groove 18 on the arc plate 17, the rotational motion of the threaded block 19 is converted into the linear motion of the arc plate 17 along the axial direction of the threaded block 19. The two symmetrically arranged arc plates 17 can move synchronously towards or away from each other under the drive of the threaded block 19, thereby driving the adjustment arm 5 to slide within the support cylinder 4, ultimately realizing the adjustment of the position of the guide component 3.

[0031] In this solution, the servo motor 22 features fast response speed and high control precision, enabling fine-tuning of the position of the guide component 3 according to the controller's instructions, ensuring the accuracy of cable routing correction. The synchronous belt drive offers advantages such as smooth transmission, low noise, and high transmission efficiency, guaranteeing reliable power transmission and preventing jamming or step loss during adjustment, further enhancing the working stability and adjustment precision of the adjustment unit 7.

[0032] For further details, please refer to [link / reference]. Figure 5 The limiting member 21 includes a baffle 25 fixedly connected to the end of the arc plate 17 away from the adjusting arm 5. Slider 26 is fixed to both the upper and lower ends of the baffle 25. A guide rail 27 is slidably connected to the slider 26. A connecting plate 28 is fixed to the top of the guide rail 27. The connecting plate 28 is fixed to the outer wall of the mounting plate 2. The transmission unit 10 is fixed to the end of the baffle 25 away from the arc plate 17. The lubrication unit 9 is located above the transmission unit 10.

[0033] It should be noted that the limiting component 21 guides and limits the movement of the arc plate 17, ensuring the stability and accuracy of the adjustment unit 7's operation. When the arc plate 17 moves linearly under the drive of the threaded block 19, the baffle 25 fixedly connected to it moves synchronously, and the slider 26 on the top of the baffle 25 slides along the guide rail 27. The guide rail 27 is fixed to the outer wall of the mounting plate 2 via the connecting plate 28, providing a stable track for the slider 26's sliding, effectively limiting the lateral offset and swaying of the arc plate 17 during movement, ensuring that the arc plate 17 always moves smoothly along the preset direction. At the same time, the cooperation between the guide rail 27 and the slider 26 can also withstand the lateral force generated during the movement of the arc plate 17, dispersing the force, protecting the meshing structure of the threaded block 19 and the threaded groove 18, and extending the service life of the adjustment unit 7.

[0034] Example 2: Refer to Figure 6 and Figure 7 As shown, this embodiment further explains the first embodiment, the difference being that the linkage structure between the lubrication unit 9 and the transmission unit 10 is optimized, making the lubrication process more precise and efficient.

[0035] Specifically, the transmission unit 10 includes a second connecting plate 29 fixedly connected to the baffle 25. A protruding plate 30 is fixed to the top of the second connecting plate 29. The top of the protruding plate 30 is provided with several corrugated protrusions. The protruding plate 30 is connected to the top of the lubrication unit 9 in a transmission connection. The lubrication unit 9 includes an oil box 31 containing lubricating oil. A third connecting plate 32 is fixed to the bottom of the oil box 31. The oil box 31 is fixed to the top of the support plate 2 through the third connecting plate 32. An oil outlet 33 is fixed to the bottom of the oil box 31.

[0036] It should be noted that, through the linkage design of the transmission unit 10 and the lubrication unit 9, when the adjustment unit 7 is activated, the baffle 25 drives the connecting plate 29 to move, thereby causing the convex plate 30 to move synchronously. During the movement, the wave-shaped protrusion on the top of the convex plate 30 will periodically contact and separate from the component at the top of the lubrication unit 9, thereby triggering the opening and closing of the oil outlet 33, realizing the intermittent supply of lubricating oil, ensuring timely lubrication when the adjustment arm 5 and the support cylinder 4 slide relative to each other, avoiding wear caused by dry friction, and stopping the oil supply when the device is stationary, effectively saving the amount of lubricating oil used.

[0037] The oil outlet component 33 includes a cylindrical body 34 fixedly connected to the bottom of the oil box 31. The top of the cylindrical body 34 is connected to the oil box 31. A stop block 35 is fixed to the inner wall of the cylindrical body 34. An oil passage 36 is opened on the stop block 35. A sealing plate 37 is slidably connected to the upper side of the oil passage 36. A valve stem 38 is fixed to the bottom end of the sealing plate 37. The valve stem 38 slides through the bottom of the cylindrical body 34. A roller 39 is fixed to the bottom end of the valve stem 38. The roller 39 makes rolling friction contact with the convex plate 30. A return spring 40 is provided between the roller 39 and the cylindrical body 34. An oil injection pipe 41 is connected to the bottom end of the cylindrical body 34. The distal end of the oil injection pipe 41 is connected to the oil hole 8.

[0038] In this scheme, the principle of lubrication of oil hole 8 is as follows: When the adjusting unit 7 moves the baffle 25, the connecting plate 29 moves the convex plate 30 simultaneously. The wave-shaped protrusion on the top of the convex plate 30 periodically pushes up the roller 39. When the roller 39 moves upward, it drives the valve stem 38 and the sealing plate 37 to move upward. At this time, the return spring 40 is compressed, the sealing plate 37 separates from the stop block 35, and the lubricating oil in the oil box 31 flows into the oil hole 8 through the oil passage 36, the cylinder 34, and the oil injection pipe 41, realizing the lubrication between the support cylinder 4 and the adjusting arm 5. When the wave-shaped protrusion moves away, the elastic force of the return spring 40 pushes the roller 39, the valve stem 38, and the sealing plate 37 to reset. The sealing plate 37 re-fits the stop block 35, closes the oil passage 36, and stops the oil supply.

[0039] It should be noted that the diameter of the oil passage 36 and the spacing of the wave protrusions can be designed according to actual lubrication requirements to control the amount and frequency of oil supply each time, ensuring that the support cylinder 4 and the adjusting arm 5 always maintain an appropriate amount of lubricating oil film, effectively reducing the coefficient of friction and extending the mechanical life of the device.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A constant tension overhead line guiding device for electrified railway catenary, comprising: A high-level mounting frame is fixedly connected to a constant tension overhead line vehicle. The top of the high-level mounting frame is fixed with a mounting plate, and the mounting plate is provided with multiple guide components arranged opposite to each other. Its characteristic is that it further includes: A support cylinder rotatably connected to the guide assembly, an adjusting arm slidably sleeved inside the support cylinder, a monitoring unit connected to the support cylinder for detecting tilting of the cable passing through the guide assembly, and an adjusting unit connected to one end of the adjusting arm for adjusting the position of the guide assembly; and, An oil hole is provided on the support cylinder and communicates with the adjusting arm; a lubrication unit for injecting oil into the oil hole is fixedly connected to the top of the mounting plate; and, A transmission unit located at the bottom of the lubrication unit and used to provide oil supply power is fixedly connected to the adjustment unit; The monitoring unit includes an annular plate that is fixedly sleeved with the adjusting arm. A pressure sensor is fixedly installed on one side of the annular plate. Both ends of the support cylinder are provided with elastic members, and one end of the elastic member is abutted against the signal input end of the pressure sensor. The adjustment unit includes an arc-shaped plate fixedly connected to the end of the adjustment arm away from the support cylinder. Two arc-shaped plates are symmetrically arranged on the upper and lower sides. Threaded grooves are provided on the adjacent sides of the two arc-shaped plates. Threaded blocks are engaged in the threaded grooves. A driving component is provided at one end of the threaded block. A limiting component is fixed at the end of the arc-shaped plate away from the adjustment arm. The limiting component includes a baffle fixedly connected to the end of the arc plate away from the adjusting arm. Sliders are fixed at both the upper and lower ends of the baffle. A guide rail is slidably connected to the slider. A connecting plate is fixed at the top of the guide rail. The connecting plate is fixed to the outer wall of the mounting plate. The transmission unit is fixed at the end of the baffle away from the arc plate. The lubrication unit is located above the transmission unit. The transmission unit includes a second connecting plate fixedly connected to the baffle. A protruding plate is fixed to the top of the second connecting plate. The top of the protruding plate is provided with several wave-shaped protrusions. The protruding plate is connected to the top of the lubrication unit in a transmission connection. The lubrication unit includes an oil box containing lubricating oil, a connecting plate three is fixed to the bottom of the oil box, the oil box is fixed to the top of the mounting plate through the connecting plate three, and an oil outlet is fixed to the bottom of the oil box. The oil outlet includes a cylindrical body fixedly connected to the bottom of the oil box. The top of the cylindrical body is connected to the oil box. A stop block is fixed to the inner wall of the cylindrical body. An oil passage is opened on the stop block. A sealing plate is slidably connected to the upper side of the oil passage. A valve stem is fixed to the bottom end of the sealing plate. The valve stem slides through the bottom of the cylindrical body, and a roller is fixed to the bottom end of the valve stem. The roller makes rolling friction contact with the convex plate. A return spring is provided between the roller and the cylindrical body. An oil injection pipe is connected to the bottom end of the cylindrical body. The distal end of the oil injection pipe is connected to the oil hole.

2. The constant tension catenary wire guiding device for electrified railway according to claim 1, characterized in that: The elastic element includes an annular plate two fixedly connected to both ends of the support cylinder. A buffer airbag is fixed to one side of the annular plate two. An abutment plate is fixed to the end of the buffer airbag away from the annular plate two. One side of the abutment plate is abutted against the signal input end of the pressure sensor.

3. The constant tension catenary wire guiding device for electrified railway according to claim 1, characterized in that: The driving component includes a servo motor fixedly connected to the outer wall of the mounting plate. The output end of the servo motor is fixedly equipped with a drive pulley. The drive pulley is connected to a driven pulley via a synchronous belt drive. One end of the central shaft of the driven pulley is fixedly connected to the threaded block.

4. The constant tension catenary wire guiding device for electrified railway according to claim 1, characterized in that: The output terminal of the pressure sensor is electrically connected to an external controller, and the controller is electrically connected to the regulating unit.

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