424 results about "Contact line" patented technology

The invention discloses a catenary part detection system comprising a data acquisition module used for acquiring multi-modal data of catenary parts in real time; the data preprocessing module is used for preprocessing the collected multi-modal data; the topological structure construction module is used for constructing a topological structure of the catenary part and generating a topological feature vector; the fault identification and prediction module is used for carrying out fault identification and predicting the healthy evolution trend of the parts; the alarm and response module is used for generating alarm scores and triggering corresponding response strategies according to different alarm grades; the intelligent decision support module is used for generating intelligent maintenance suggestions, providing maintenance decision support and helping make repair and maintenance plans; and the remote monitoring and feedback module is used for monitoring the state of the overhead line system in real time and feeding back the state to the monitoring platform to support remote operation and updating. According to the invention, through dynamic topology modeling and deep learning technologies, accurate fault identification and health monitoring of contact network parts are realized.

The invention discloses a self-adaptive grinding control method and system for a rigid contact network, and belongs to the technical field of maintenance of rail transit power supply equipment. The method comprises the following steps: acquiring pantograph-catenary action historical data of each position of the contact network along a busbar direction, and constructing a contact line damage index distribution curve; identifying a high damage interval based on the damage index, extracting roughness, ripple amplitude and oxidation thickness parameters, constructing a damage intensity vector, and calculating a damage grade score of each position by adopting a fuzzy comprehensive evaluation method; a preset polishing strategy library is matched according to the scoring result, a corresponding polishing wheel combination, the rotating speed and the contact pressure are determined, and a control parameter set is generated; the grinding device dynamically adjusts the working state according to the control parameters in the advancing process. The method achieves full-process self-adaptive closed-loop control of state recognition, strategy decision, execution control and quality feedback of contact line grinding operation.

An intelligent contact line automatic milling, grinding and polishing device comprises a mounting frame and a plurality of balance wheel assemblies, positioning wheel assemblies, milling and grinding assemblies, polishing wheel assemblies and walking wheel assemblies which are mounted on the mounting frame, each milling and grinding assembly comprises a middle mounting plate and a milling and grinding device arranged above the middle mounting plate, a guide rail is arranged on the top face of a bottom plate, and the top face of the bottom plate is provided with a guide rail. The extending direction of the guide rail is perpendicular to the walking direction of the equipment, a guide groove is formed in the bottom of the middle mounting plate, and the guide groove is clamped on the guide rail and can move along the guide rail; the milling and grinding device comprises a milling and grinding base and a cutter arranged on the milling and grinding base, the cutter is arranged in a disc shape, and the cross section of the outer surface of the cutter is arranged in a concave arc shape. According to the repairing equipment, sharp corners and burrs on the two sides of an abraded contact net line can be machined into arc-shaped transition or filleted corners, fine adjustment and correction can be conducted on equipment inclining in the walking process, and the repairing quality is greatly improved; the practicability is high, and the popularization significance is high.

The utility model relates to the technical field of contact line detection, aims to solve the technical problems that in the existing contact line abrasion detection, manual operation has potential safety hazards, the high efficiency is low, and an automatic detection device cannot accurately recognize obstacles, and particularly relates to an obstacle-avoiding line climbing robot which comprises a contact line arranged at the top of a power generation device. The top of the contact line is provided with a plurality of guide wheel mechanisms used for moving on the contact line and avoiding obstacles, and the bottom of each guide wheel mechanism is provided with a base plate. The top of the base plate is provided with a plurality of detection parts used for detecting obstacles on the contact line, a power part used for clamping the contact line together with the guide wheel mechanism, and an abrasion detector used for detecting the abrasion loss of the contact line. The line-climbing robot can quickly complete line-climbing movement and obstacle avoidance work, the obstacle avoidance success rate of the line-climbing robot is increased, the working efficiency of robot detection is improved, and the robot is prevented from being damaged due to collision with the obstacle.

The invention provides a catenary height adjustment method and system, and relates to the technical field of catenary height adjustment, and the method comprises the steps: obtaining the on-site measurement data of the height of a conductor in the span of a catenary; establishing a statics model of the elastic chain type suspension based on a parabola unit hypothesis; calculating the dropper force of each dropper according to the measurement data and the stress balance principle of the parabola unit; the vertical displacement of each node of the carrier cable is solved through a moment balance equation, and then the space coordinates of the carrier cable are obtained; calculating the theoretical length of each dropper according to the coordinates of the carrier cable, the design height of the contact line and the dropper force; and comparing the theoretical length with the dropper length in a standard state to generate a dropper length adjustment strategy. The method provided by the invention not only can realize measurement bottleneck breakthrough, but also can be suitable for complex suspension conditions, and in addition, can also ensure the performability of an adjustment strategy, output a quantified dropper shortening amount and guide accurate construction.

The invention relates to the technical field of resistance spot welding, in particular to a cement telegraph pole reinforcement cage automatic binding and welding integrated device based on PLC control. The device comprises a working rotating disc rotationally connected with a mounting support, a machining channel allowing the reinforcement cage to horizontally penetrate through is formed in the center of the working rotating disc, a conductive wheel and a pressing assembly are arranged on the same side of the working rotating disc, and the conductive wheel, the pressing assembly and the reinforcement cage form a closed conductive loop. When the diameter of the produced reinforcement cage is small, the axial component force applied to the spiral bar by the cylindrical pressing wheel is guided by the inclined plane of the groove, and forced friction is reduced. When the diameter of a produced reinforcement cage is large and the reset slope of the circular truncated cone pressing wheel presses a spiral bar, the acting direction of force is more deviated to the radial direction, the axial component force is reduced, and therefore the axial friction force is reduced. When the reset slope on the periphery of the round table roll welding wheel is in contact with the spiral rib, an inclined contact line along the conical surface is formed.

The invention relates to a load-bearing seatbelt retractor for a seat structure of a vehicle seat, the seatbelt retractor having two housing halves between which functional modules of the seatbelt retractor are disposed. One functional module is a belt reel having a winding axis. The two housing halves form two mutually parallel receptacles in the seatbelt retractor, which are oriented perpendicular to the winding axis. Two seat bars can be inserted into the receptacles. The two housing halves are in contact at least on two contact lines above and below the functional modules with respect to an insertion direction of the receptacles. The lower contact line splits open on both sides along the winding axis such that respective intermediate spaces open toward the receptacles are formed.

The water-resistant watch case includes at least one crystal mounted on an upper side of a middle, a fastening gasket positioned between an upper annular inner wall of the middle and an upper annular outer wall of the crystal. The crystal includes an annular peripheral surface below the upper annular outer wall inclined at an angle smaller than 90° in relation to an axis perpendicular to a plane of the watch case. The peripheral surface comes into contact against an annular inner surface of the middle inclined at an angle similar to the inclination of the annular peripheral surface and below the upper annular inner wall of the middle. The annular peripheral surface and / or the annular inner surface of the middle includes a domed contact portion for a contact on an annular contact line between the two surfaces.

The invention relates to a light-weight type planetary line gear reducer which comprises a sun gear, a planetary gear, an inner gear ring and a planetary carrier which are all light-weight type line gears, the sun gear is located in the center of the inner gear ring, the sun gear and the planetary carrier are both coaxially and rotationally installed on the inner gear ring, and the planetary gear is installed on the planetary carrier in a heteroaxial rotation mode and can rotate around the axis of the planetary gear. And the tooth surface normal of any contact point of the planet gear is collinear with the tooth surface normal of the corresponding contact point of the sun gear and the inner gear ring at the same time, the contact line is a cylindrical spiral line, and the transmission ratio and the spiral radius are decoupled. Through the space curve meshing theory, the reduction ratio exceeding 30 can be achieved through a single stage, the stage number of the planetary reducer is reduced, the force flow transmission path is remarkably shortened, the overall weight is reduced, and meanwhile the bearing capacity and reliability are improved; the technical problems that in the prior art, when the large reduction ratio is achieved, the multi-stage series connection structure is complex, the weight is increased, the transmission and positioning precision is reduced, and the load dispersing capacity is limited are systematically solved.

The present application belongs to the technical field of gear machining, and discloses a forming milling machining method of spherical gear. The method uses a disc-shaped milling cutter to machine the spherical gear, and the steps are as follows: firstly, the parameters of the spherical gear are given, the tooth surface equation of the spherical gear is derived, and the tooth surface normal vector is calculated; secondly, the forming milling machining coordinate system of the spherical gear is established, and the homogeneous transformation matrix between the coordinate systems is derived, and then the contact line equation between the spherical gear and the disc-shaped milling cutter is derived; then, the cross-sectional profile of the disc-shaped milling cutter is calculated, and then the rotary surface of the disc-shaped milling cutter is obtained; finally, the spherical gear is formed and milled by using the calculated disc-shaped milling cutter, and after machining an annular gear slot, the disc-shaped milling cutter is rotated by a certain angle to continue machining the next gear slot. The forming milling machining method of the spherical gear proposed by the present application can realize the machining of the spherical gear without relying on special gear machining machine tools, and the disc-shaped milling cutter used has a simple structure and is easy to manufacture.

A spectacle lens design includes an aperture and at least two ring-shaped focusing structures surrounding the aperture. The aperture has a dioptric power, and the ring-shaped focusing structures surrounding the aperture provide an additional power relative to the dioptric power of the aperture. A ring-shaped diffuser is arranged between neighboring ring-shaped focusing structures. Neighboring ring-shaped focusing structures can adjoin each other with a ring-shaped contact line between them forming the ring-shaped diffuser. Neighboring ring-shaped focusing structures can also be arranged at a distance to each other and at least one of the ring-shaped focusing structures provides a ring shaped focal line. Neighboring ring-shaped focusing structures can also be arranged at a distance to each other and at least one of the ring-shaped focusing structures consists of lenslets that adjoin each other so as to form a ring of lenslets and provides a plurality of foci along a ring shaped line.

According to the rigid contact net contact line abrasion measuring method, the contact net contact line is detected in real time, the abrasion area of the contact line is synchronously calculated, the calculation efficiency is high, and remote checking can be achieved. The invention provides a rigid contact net contact line abrasion measuring method which comprises the following steps: S1, arranging a measuring device and setting measuring parameters, and scanning and acquiring a rigid contact net contact line contour; s2, analyzing the obtained contour of the contact line of the rigid contact network to obtain a contour of an unworn surface of the contact line and a contour of a worn surface of the contact line; s3, fitting the contour of the unworn surface of the contact line obtained in the step S2 to obtain a theoretical contour A [semicircle] B of the contact line, determining two end points C and D of the worn surface, and fitting to obtain a distance LCD between the two end points C and D of the worn surface; s4, calculating the length LOE of the distance between the circle center O of the arc and the LCD; s5, calculating the residual height L of the contact line; and S6, calculating the actual abrasion area S of the contact line of the rigid contact net.

The invention relates to the technical field of dropper calibration, in particular to an automatic positioning device of high-speed railway catenary dropper calibration equipment, which comprises an unmanned aerial vehicle, an adjusting module and a positioning module, the unmanned aerial vehicle can fly along a catenary, the adjusting module is arranged on the unmanned aerial vehicle, and the adjusting module comprises a connecting mechanism. An adjusting mechanism is arranged at the bottom of the connecting mechanism and comprises a fixing frame. According to the invention, the positioning module is arranged between the two positioning mechanisms at the top, so that the unmanned aerial vehicle can fly along the overhead line system, when the positioning module moves to an approximate calibration position, the positioning module can be clamped on the contact line, the contact line is calibrated through the positioning module, and when a train passes, the unmanned aerial vehicle can fly away from the contact line temporarily, so that the unmanned aerial vehicle can be calibrated. In this way, time does not need to be specially arranged for calibration, only the dropper can be installed in idle time, time does not need to be spent for calibration, and the speed of replacing and installing the dropper can be increased.

The invention discloses an inland waterway freight ship rail charging system, which comprises a charging rail and connecting module, a power supply module, a control module and a safety protection module, and is characterized in that overhead contact lines are mounted on two sides of a river bank, and ground wires arranged on the bank cooperatively work with the overhead contact lines; by means of a composite positioning system based on laser radar and visual identification, shore charging equipment is monitored in real time, the laser radar rapidly measures distance and angle information between a ship and the charging equipment, and when the ship sails close to a specific area in an inland waterway, the ship is in butt joint with the shore charging equipment to be charged in a slow sailing state; the key problem existing in an existing charging mode is solved, so that popularization and application of inland river new energy freight ships are greatly promoted, and a foundation is built for green development and transformation and upgrading in the field of inland river shipping.

The invention discloses a slow-start pneumatic switch valve device for trichlorosilane feeding, and belongs to the technical field of material preparation process valves. Comprising a switch valve and a pneumatic actuator, linear motion of a piston rod is converted into rotation fine adjustment through a swing arm rotation compensation mechanism, a solid / microgroove sealing ring and a sliding cavity wall are always kept on a theoretical contact line, abrasion microgaps are automatically compensated, zero-clearance sliding in the whole life cycle is achieved, and manual clearance adjustment is avoided; the solid sealing ring adopts surface-surface contact, so that the unit pressure is reduced by more than 50%, and the wear rate is obviously reduced; the omega-shaped groove of the microgroove sealing ring converts solid particles (10-50 microns Si) into groove edge elastic sealing, and the wear rate is reduced by 40% again; a sealing surface is provided with a uniform oil film, the dynamic and static friction coefficient difference is reduced, crawling / jumping in a 0-20% opening low-speed stage is eliminated, true slow starting is achieved, the water hammer effect during trichlorosilane feeding is avoided, the sealing surface is provided with the uniform oil film, the dynamic and static friction coefficient difference is reduced, and crawling / jumping in the 0-20% opening low-speed stage is eliminated.

The invention relates to a contact network ultrasonic impact vibration deicing device and method capable of being deployed on a pantograph, and belongs to the field of power ultrasonic technology application. Comprising an ultrasonic deicer and an ultrasonic generator, and the ultrasonic deicer is connected with the ultrasonic generator. The ultrasonic deicer comprises an upper machine shell, a lower machine shell, a tool head, piezoelectric ceramics, an electrode plate, a deicing working head, a spring and a free mass block, the electrode plate is connected with the ultrasonic generator, the electrode plate and the piezoelectric ceramics are connected with the tool head, the tool head and the free mass block placed on the tool head are arranged in the lower machine shell, and the piezoelectric ceramics are connected with the free mass block. An upper machine shell is arranged on the upper portion of the lower machine shell, a spring is arranged in the upper machine shell, one end of the deicing working head penetrates through the upper machine shell to be matched with the free mass block, and the two ends of the spring abut against the upper machine shell and the deicing working head respectively. The problems that deicing efficiency is low and deicing is not thorough are effectively solved, and deicing and power receiving and current taking can be conducted synchronously in the train running process.

The utility model relates to the technical field of detection equipment, in particular to a contact line detection device utilizing a lever to amplify errors, which comprises two groups of traveling wheels which are positioned above a contact line and are in vertical rolling contact with the contact line, and the two groups of traveling wheels are respectively and fixedly connected onto two groups of traveling wheel fixing rods. The two ends of the walking wheel fixing rod are rotationally connected to a walking wheel support through walking wheel bearings, the walking wheel support is fixedly connected to the supporting frame, and the bottom of the contact line is provided with a lever detection unit installed on the supporting frame. According to the contact line detection device using the lever to amplify the error, the walking wheels are used for driving the whole device to move on the contact line, the abrasion position and degree of the contact line can be more efficiently detected, the problems that an existing detection device is low in efficiency and low in informatization degree are effectively solved, and under the action of the lever detection unit, the detection accuracy is improved. The abrasion loss of the abrasion position can be amplified, tiny abrasion can be detected, and the advantages of being high in accuracy and reliability are achieved.

The invention relates to the technical field of mechanical manufacturing and machining, in particular to a dressing wheel and honing wheel design method for improving contact line stability in the gear honing machining process. Based on workpiece gear parameters, a left and right tooth surface mathematical model is established, a honing process space coordinate conversion relation is established, a conjugate meshing relational expression is derived by combining the relative slip speed of meshing contact points and a normal vector, and a tooth surface contact line model is established; and the calculation modeling of the two-dimensional projection of the left and right tooth surface contact lines, the projection intersection point position and the variation under the same rotation angle is realized. And a honing wheel dressing contact line model under dressing wheels with different tooth numbers and a tooth surface contact line intersection projection model in the dressing and honing process under the tooth number difference are established. A honing wheel and variable tooth number dressing wheel design method is provided, and geometric and technological parameters of the honing wheel and the variable tooth number dressing wheel are determined; and a trimming and honing two-degree-of-freedom conjugate meshing relation and a modified tooth surface numerical model are constructed and verified, discretization and point cloud processing are conducted on the model, high-precision tooth surface point cloud is obtained, and accurate machining of a trimming wheel and a honing wheel is guided.

According to an aspect, there is provided a mounting assembly (20) for a hair cutting appliance (10), the mounting assembly comprising: a head (22) configured to receive a cutting unit and comprising: a body (24) extending along an elongate axis (50): a driving bridge (26) configured to couple to the cutting unit and to reciprocally move relative to the body along the elongate axis to reciprocally move the cutting unit relative to the body; a primary head bearing surface (44); and a separate secondary head bearing surface (52); a counterpart (40) pivotably coupled to the head. the counterpart comprising: a primary counterpart bearing surface (46) configured to cooperate with the primary head bearing surface to permit sliding rotation of the counterpart relative to the head about a first rotational axis (60) which is parallel to the elongate axis, and configured to contact the primary head bearing surface along a contact line to limit movement of the head towards the counterpart along a second axis (30) perpendicular to the first rotational axis; and a secondary counterpart bearing surface (54) separate from the primary counterpart bearing surface and configured to cooperate with the secondary head bearing surface to permit sliding rotation of the counterpart relative to the head about the first rotational axis, and configured to bear against the secondary head bearing surface to limit movement of the head relative to the counterpart along a third axis (70) which is perpendicular to the second axis and the first rotational axis; and a driving unit (34) comprising a driving axle (36) and a socket (38), the driving axle comprising an eccentric pin (42) cooperating with the driving bridge to impart reciprocating motion to the driving bridge, and the socket being configured to cooperate with a motor (14).

The utility model relates to the technical field of screen printing machines, and discloses a scraper device and a screen printing device with the scraper device, the scraper device comprises a lifting driving mechanism, two cross rods and two sets of scrapers, the lifting driving mechanism comprises a rotary driving mechanism, a synchronous belt and four sets of lead screw pairs, the four sets of lead screw pairs are vertically arranged and distributed in a four-corner mode, and the two cross rods are arranged on the rotary driving mechanism. The rotary driving mechanism is in transmission connection with lead screws of the four lead screw pairs through a synchronous belt; the two ends of one cross rod are connected with the two lead screw nut seats of the two lead screw pairs, and the two ends of the other cross rod are connected with the two lead screw nut seats of the other two lead screw pairs; and the two groups of scrapers are respectively arranged on the two cross rods. The rotary driving mechanism synchronously drives the lead screws of the four lead screw pairs to rotate through the synchronous belt, the four lead screw nut seats drive the two transverse rods and the two scrapers to synchronously ascend and descend, then it is guaranteed that the two scrapers synchronously move with high precision, the contact ratio of the two scrapers on the contact line of the screen frame is guaranteed, and the risk of crushing a workpiece is reduced.

The invention relates to the technical field of electrified railway catenaries, and provides an intelligent monitoring system and method for a catenary section insulator, and the method comprises the steps: collecting a visible light video, converting the visible light video into an HSV color space, and extracting the contour of a pantograph slide plate through combining the material and shape features; an optical flow method is adopted to track the contact track, the number of effective contact times is counted, and voltage and temperature data are synchronized to analyze performance changes before and after contact; and finally, a relation graph model is constructed, trend prediction and abnormal early warning of the state of the section insulator are realized, so that the operation state of the section insulator in the overhead line system can be continuously monitored in real time, advance perception and trend pre-judgment of faults are realized, and the safety and reliability of a railway system are effectively improved.

The utility model relates to the technical field of deviation rectification, and discloses a coal conveyor carrier roller belt deviation rectification structure which comprises a cross beam, a middle section roller is arranged on the cross beam, side rollers inclining forwards are arranged on the two sides of the middle section roller, the side rollers are installed on a side roller frame, and the side roller frame is rotationally connected with the cross beam. The side rollers are conical, the large ends of the side rollers are close to the two ends of the middle-section roller, and the two side rollers can rotate synchronously. The positions of the mounting clamping grooves of the side rollers are changed, and the side rollers have certain forward inclination angles after entering the grooves, so that contact lines of the three sections of roller bodies and a belt are changed into broken lines, an automatic deviation rectifying function is achieved, a conveying belt is prevented from running off-tracking, scattered materials are reduced, abrasion and tearing of the conveying belt are avoided, and the service life of the conveying belt is prolonged; the conical carrier rollers are used in a matched mode, and the deviation rectifying effect is achieved; the roller sleeve is made of a low-friction material, so that friction, energy loss and equipment operation energy consumption can be reduced, and the requirement of environmental protection is met.

This application discloses a method and system for rapid contact line identification based on a parallel architecture. The daytime working mode of the identification method includes: collecting a contact line image to obtain a known image; normalizing the one-dimensional data of the known image to obtain the mean of the one-dimensional data at the bull's-eye position; constructing a one-dimensional matching template for the contact line based on the mean; calculating the template matching results of the one-dimensional image data at the bull's-eye and the pixels above and below the bull's-eye position, with the contact line position being the maximum template matching result; the nighttime working mode includes: using one-dimensional template matching to identify the image heights of 30, H / 2, and H-30 at the start, center, and end positions, respectively, as Pos0, Pos1, and Pos2; determining the positional relationship between the center position and the start and end positions, and interpreting the contact line position. This method improves the accuracy and speed of rapid contact line detection, meeting the detection requirements for contact network geometric parameters at branch and anchor sections.

The invention discloses uniform-pressure silicon steel cold rolling equipment, and relates to the field of silicon steel cold rolling, the uniform-pressure silicon steel cold rolling equipment comprises a linearly through rack, two working rollers are distributed in the rack in parallel up and down, a gap for conducting silicon steel is formed between the two working rollers, two supporting rollers are symmetrically arranged on the far sides of the two working rollers, and the two supporting rollers are horizontally distributed at intervals; two parallel contact lines are arranged between the two supporting rollers and the working roller, symmetrical abutting force is applied to the working roller through the positions of the two contact lines, so that the working roller is positioned, it is guaranteed that the working roller has high rigidity, and the service life of the working roller is prolonged. And position deviation or self-deformation of the working roll is avoided, uniform pressure of the working roll is ensured, and the cold rolling quality of silicon steel is improved.

The invention relates to a method and a device for grinding rod-shaped workpieces, in particular welding electrodes (5, 5'), in which a surface area of ​​the workpiece (5, 5') to be ground and an abrasive contact surface area of ​​a rotating grinding tool (7) are pressed against each other. The object of the invention is to create a method and a device for grinding rod-shaped workpieces that are easy to implement and flexible to use in practice. This task is solved by the contact surface area of ​​the grinding tool (7) forming a contact line that is particularly concave, and by moving the rotating grinding tool (7) and the workpiece (5, 5') relative to each other in order to grind the entire surface of the workpiece (5, 5').

This invention provides a static parameter measurement device for overhead contact lines based on an unmanned aerial vehicle (UAV) platform, belonging to the field of railway overhead contact line inspection technology. It includes a UAV body with a laser measuring device mounted on its top and a telescopic support mounted on its side. The UAV body includes a processor chip, and the laser measuring device is connected to the processor chip. After takeoff, the telescopic support secures the UAV, and the laser measuring device measures the overhead contact line. The measured data is transmitted in real time to the processor chip for processing and analysis, ultimately achieving high-precision measurement of the static parameters of the overhead contact line. By linking the top-mounted laser measuring device with the processor chip, it is possible to conduct inspections and parameter measurements on conventional railway lines outside of designated maintenance windows, achieving high-precision, non-contact distance or terrain measurement, suitable for complex environments, and significantly improving data acquisition efficiency.

The invention provides a rigid contact line reinforcing method, which comprises the following steps of: S101, detecting a contact line on a busbar to be detected, and confirming an abrasion area of the abraded contact line on the busbar; s102, reinforcing modules are installed on the two sides of the busbar; s103, reinforcing contact lines are fixed on the two sides of the busbar in a mirror image mode through a reinforcing module, and then the reinforcing contact lines are adjusted to be parallel to the abrasion contact lines; when the train runs, the top of the carbon sliding plate slides from the unworn position on the wear contact line to the reinforcing contact line and then slides to the unworn position on the wear contact line so as to avoid the wear area of the wear contact line. The problem that manpower and material resources are seriously consumed when an abraded contact line is integrally replaced is solved, and the operation convenience and efficiency of remedying the abraded contact line are improved.

This utility model relates to an auxiliary device for manual overhead contact line laying, comprising a flatbed cart, a laying frame mounted on the flatbed cart, and a wire reel detachably mounted on the laying frame. The laying frame includes two symmetrically arranged support frames, each with a height-adjustable support plate via an adjustment mechanism. A lifting plate is mounted above the support plates via a lifting mechanism, and the outer end of the support shaft of the wire reel is mounted on the lifting plate. This auxiliary device for manual overhead contact line laying consists of a flatbed cart and two detachably mounted support frames on its top left and right sides. It has a simple structure, is convenient and flexible to use, and assists manual laying operations. In the replacement of conductors on existing overhead contact lines, workers can wait at the construction site in advance, and upon the issuance of the track maintenance window command, manually lift the reel onto the railway track for laying operations, greatly reducing machinery costs and improving construction efficiency.

The utility model discloses a spiral compression spring which comprises supporting rings at the two ends and a spring body located between the two supporting rings, the spring body and the supporting rings are sequentially and spirally wound in a directional mode to form a cylindrical shape, and the two end rings of the spiral compression spring are tightly combined and ground to be flat or are tightly combined and ground to be flat after being flattened. A gap is formed between every two rings of the spring body, and a contact line compensation ring is additionally arranged on the supporting ring; the contact line compensation ring and the supporting ring are integrally formed, and the contact line compensation ring extends by a certain length from the contact point of the supporting ring and the spring body to the tail tip direction along the spiral line of the supporting ring. According to the utility model, the contact line of the cylindrical helical compression spring can be independently compensated, the length of the contact line meeting the standard requirement can be obtained without loading or loading a very small axial load, the properties such as the total number of turns, the number of effective turns, the free height, the compression height and the reserved safety stroke are not changed, the stability and the bearing capacity are improved, and the production cost is reduced. The service life is prolonged.