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461results about "Rail switches" patented technology

Rapid measurement method and system for geometric irregularity of track in turnout zone

The invention discloses a rapid measurement method and system for geometric irregularity of a track in a turnout zone. The method comprises the steps that complete three-dimensional point cloud data of the surface of a railway turnout steel rail are obtained in real time through a multi-angle line structure laser scanner on a special detection vehicle body; accurate attitude and position data of the detected vehicle body in the measurement process are obtained in real time through an inertial navigation measurement unit and an odometer; obtaining a high-precision pose of a detected vehicle body through a robust dead reckoning method of an IMU (Inertial Measurement Unit) assisted by a speedometer dynamic lever arm value based on a variable wheel-rail contact point; constructing a turnout area three-dimensional point cloud model; extracting geometric irregularity key points of turnout steel rail point cloud from the turnout area three-dimensional point cloud model; calculating parameters of track gauge, horizontal and rail direction irregularity and unevenness; the special detection vehicle body can quickly and stably pass through a turnout area to complete continuous and accurate measurement of geometric irregularity of a track.
Owner:WUHAN UNIV

Rail frog repairing device

The utility model provides a track frog repairing device which comprises a base, a mechanical arm is assembled on the base, and a welding machine and a scanner are arranged at the end of the mechanical arm and used for scanning, welding and repairing a track frog body placed on the top of the base. A clamping mechanism is arranged at the top of the base and comprises a vertical rod, a movable plate is rotationally mounted at the top of the vertical rod, two clamping plates are arranged at the bottom of the movable plate, and the two clamping plates are driven to be relatively close to each other and clamped in the track frog body; a threaded groove communicated with the rotating shaft of the movable plate is formed in the movable plate, and a positioning bolt is in threaded connection with the interior of the threaded groove. According to the rail frog clamping device, the movable plate at the top of the vertical rod can rotate and is locked through the positioning bolt, so that the angle is adjusted, the angle of the two clamping plates is adjusted synchronously, the clamping angle can be changed, the rail frog clamping device is used for clamping rail frog bodies with different angle specifications, and the application range is wide.
Owner:WUHU CHINA RAILWAY TRACK EQUIP CO LTD

Throat turnout group determination method and apparatus, device, and medium

The present disclosure is applicable to the field of railway signal control, and provides a throat turnout group determination method, comprising: constructing a route direct conflict turnout dictionary and a throat-area turnout group dictionary on the basis of station turnout information and route information; constructing a route throat-area direct conflict turnout group dictionary on the basis of the route direct conflict turnout dictionary and the throat-area turnout group dictionary; constructing a set of occupied throat turnout groups on the basis of the throat-area turnout group dictionary and the route throat-area direct conflict turnout group dictionary and in combination with the direction of a route and a reception / departure type; and determining a turnout group having the longest total occupation time in the set of occupied throat turnout groups as a target throat turnout group. The present disclosure can enhance the computational efficiency of station throat operational capacity and solve the problem of being prone to errors caused by manual analysis.
Owner:CRSC RESEARCH & DESIGN INSTITUTE GROUP CO LTD

Drone with railway driving capabilities

A drone with railway driving capabilities has a drone body and at propeller arms. Each propeller arm has a propeller assembly having a propeller driven by a motor assembly. The propeller assembly of at least one propeller arm has a rotatably mounted propeller guard placed coaxially with the propeller. The propeller guard is shaped as a train wheel and is driven by the motor assembly. The propeller arm has an actuated joint for providing the propeller assembly with at least one rotation degree of freedom so that the propeller can be rotated between a flight mode and a driving mode and back. The flight mode involves a more horizontal orientation of the propeller assembly for providing an upwardly directed thrust force to the drone, in operational use, and the driving mode involves a more vertical orientation of the propeller assembly for allowing the respective propeller guard to drive on the railway track.
Owner:RAILWAY ROBOTICS AS

Turnout and rail transit system

A turnout structure includes at least one turnout. The at least one turnout includes: a fixed beam set including a first side beam and a second side beam, and at least two movable beam sets disposed between the first side beam and the second side beam to define at least three switchable traveling pathways. Top surfaces of the at least two movable beam sets are configured to be a first traveling surfaces for traveling wheels of a rail vehicle to travel. Each of the at least two movable beam sets includes a rotating beam and a moving beam. A rotating center is located on a first end of the rotating beam, the rotating beam is configured to rotate around the rotating center, and the moving beam is connected to a second end of the rotating beam and configured to move along a path.
Owner:BYD CO LTD

Rail shifting device for rail car for cross rail transfer

ActiveCN119796271ARail switchesPoint operation from vehicleTrackwayDialer
The invention relates to a rail shifting device for a rail car for cross-shaped rail transfer, and belongs to the technical field of rail car rail shifting tools. Comprising a guide rail and a rail car, the guide rail comprises a transverse guide rail body and a longitudinal guide rail body which are perpendicularly arranged in a crossed mode, and a rail transfer mechanism is rotationally arranged at the joint of the transverse guide rail body and the longitudinal guide rail body; wheels of the rail car run on the guide rails, the front end and the rear end of the lower end face of the rail car are each provided with a rail shifting mechanism, each rail shifting mechanism comprises a width adjusting assembly, the left end and the right end of each width adjusting assembly are each provided with a positioning block, and the lower end of each positioning block is provided with a liftable positioning seat through a lifting assembly. A positioning plate capable of rotating horizontally is arranged at the lower end of the positioning seat through a rotary positioning assembly, and a rail shifting assembly is arranged at the lower end of each positioning plate; the problem that a rail car shakes when an existing rail shifting device conducts rail changing on a rail is solved.
Owner:SHANXI DOUBLE RING HEAVY MACHINERY CO LTD +1

Method for monitoring railway points and points machine

Method for monitoring a track switch with a switch drive, wherein the switch drive includes a housing, a switch setting motor arranged in the housing and a switch rod extending out of the housing for coupling to a track switch. The method includes providing a piezoelectric sensor arranged on the housing and detecting measurement signals of the piezoelectric sensor during a switching operation of the switch drive. Periodic components of the measurement signal are at least partially filtered out in order to obtain signal components representative of a non-periodic change in the strain of the housing. The method also includes evaluating a temporal progression of the signal components representative of the non-periodic change in strain in order to identify deviations from a nominal state.
Owner:VOESTALPINE SIGNALING AUSTRIA GMBH +1

Shuttle robot and use method

PCT designated stage expiredWO2025129881A1Rail switchesRail and road vehicles
A shuttle robot and a use method. The shuttle robot comprises a robot housing (1); a ground shuttle driving mechanism used to drive the robot to travel on the ground and a rail shuttle driving mechanism used to drive the robot to travel on rails (4) are provided on the robot housing (1); the ground shuttle driving mechanism and the rail shuttle driving mechanism share driving wheels (2) arranged on two sides of the robot housing (1); the ground shuttle driving mechanism is provided with a ground auxiliary wheel set configured to work in conjunction with the driving wheels (2) to make the robot travel and move on the ground; and the rail shuttle driving mechanism is provided with a rail auxiliary wheel set configured to work in conjunction with the driving wheels (2) to make the robot travel and move on the rails.
Owner:JIANGSU HUAZHANG LOGISTICS TECH CO LTD

Rail web reinforced switch rail and turnout

According to the rail web reinforced switch rail and the turnout, the rail web reinforced switch rail is formed by machining a rail web reinforced section steel rail, the rail web thickness of the rail web reinforced section steel rail is d mm larger than that of a common section steel rail, and the rail head and the rail bottom of the rail web reinforced section steel rail are the same as the common section steel rail in type; or the rail web reinforced switch rail is formed by a special section steel rail, and the shape of a rail head of the rail web reinforced switch rail before forming is the same as that of a rail head of the special section steel rail. Raw materials are easy to obtain, machining obstacles are avoided, the milling difficulty is low, manufacturing is convenient, the working procedure is simple, and the on-site maintenance and repair difficulty is lowered; the problem of reprocessing does not exist, the rigidity, the stability and the material utilization rate of the switch rail are guaranteed, meanwhile, the equipment cost is low, and the process complexity is correspondingly reduced.
Owner:CHINA RAILWAY BAOJI BRIDGE GROUP CO LTD

Track structure with reserved turnout inserting and laying conditions

The utility model relates to the technical field of track traffic, in particular to a track structure with reserved turnout inserting and laying conditions, bolt holes are reserved in a track bed structure at the laying position of a long-term turnout, anchor bolt holes matched with the bolt holes in position are reserved in a sleeper base plate, and the bolt holes are matched with the anchor bolt holes in position. And an iron seat for mounting a steel rail of a recent line is arranged on the sleeper base plate. The device has the advantages that the work amount and the implementation risk of turnout inserting and laying can be greatly reduced, and the maintenance work amount and the safety risk point cannot be increased even if only common lines are laid in the recent period; the structure is simple, reasonable, convenient to construct and suitable for popularization.
Owner:CHINA RAILWAY SHANGHAI DESIGN INST GRP CO LTD

Hose bridge extender and railroad crossing

A bridge piece that can be used as a hose bridge extender or a railroad crossing. An exemplary bridge piece has a body having an undercut proximate one side, which undercut is positioned near a track when used as part of a railroad crossing.
Owner:CLEVELAND RECLAIM IND D B A TURTLE PLASTICS

Movable center rail fork-removing sliding bed device

The utility model discloses a movable heart rail fork-removing sliding bed plate device, comprising a bottom plate, a sliding table plate, and a movable heart rail assembly, wherein the bottom plate is detachably mounted on the fork sleeper, and a roller assembly is arranged on the bottom plate; the sliding table plate is slidably connected to the bottom plate, and a groove for accommodating the roller assembly is provided on the sliding table plate, and the inner wall of the groove is arranged at intervals relative to the roller assembly, and a slide for contacting the roller assembly is arranged in the groove; the movable heart rail assembly is fixed on the sliding table plate and used to support a wheel pair; the movable heart rail assembly is used to drive the sliding table plate to slide on the bottom plate, so as to drive the slide to move to contact with the roller assembly, thereby forming rolling friction between the bottom plate and the sliding table plate. By arranging the roller assembly between the bottom plate and the sliding table plate, when the movable heart rail assembly arranged on the sliding table plate drives the sliding table plate to move, the movement between the sliding table plate and the bottom plate is converted from sliding friction to rolling friction, thereby reducing the friction force when the movable heart rail is converted.
Owner:CHINA RAILWAY CONSTR HEAVY IND

Turnout, crossover turnout, and rail transit system

A turnout structure, which includes at least one turnout. The at least one turnout includes a fixed beam set. The fixed beam set includes a first side beam and a second side beam. The at least one turnout further includes a movable beam set. The movable beam set is disposed between the first side beam and the second side beam to define two switchable driving channels. A top surface of the movable beam set is configured as a first locomotion surface for locomotion wheels of a railway vehicle. The movable beam set includes a rotating beam and a moving beam. A first end of the rotating beam includes a rotating center. The rotating beam is configured to rotate around the rotating center, and the moving beam is connected to a second end of the rotating beam and configured to move along a path.
Owner:BYD CO LTD

Turnout steel rail lossless reinforcing device

The invention discloses a turnout steel rail lossless reinforcing device which comprises a jacking piece arranged between a stock rail and a switch rail, a connecting part and a first clamping body are sequentially arranged at the outer side rail web of at least one of the stock rail and the switch rail, and a fishplate and a second clamping body are sequentially arranged at the outer side rail web of the other one of the stock rail and the switch rail. The first clamp body and the second clamp body are connected with each other through a fastener; the connecting part comprises a plurality of unit gaskets which are sequentially stacked towards the outside of the rail web in the horizontal direction, and the thickness of the connecting part is adjusted by increasing or decreasing the number of the unit gaskets. By adjusting the thickness of the connecting part, the interval between the first clamping body and the stock rail or the switch rail can be controlled, the first clamping body can be closer to the stock rail or the switch rail at the position of the rail bottom slicing part, the first clamping body is tightly attached to the rail bottom, and then the firmness of the reinforcing device for reinforcing the stock rail and the switch rail is improved.
Owner:JIANGSU LUIDA RAILWAY EQUIPMENT CO LTD

Switch point roller assembly

PCT designated stageWO2025216863A1Rail switchesIndustrial engineeringRailroad switch
The disclosed solution generally relates to a switch point roller assembly. The switch point roller assembly is configured to be operatively connected to a switch point within a railway switch. The switch point roller assembly comprises a spring, a bolt assembly, a roller assembly, a housing assembly, and a base plate. The base plate may be secured such that the roller assembly is in substantial contact with a railway plate during movement of the switch point—such that the operation of the switch point is improved. As such, the switch point is more resilient to wear thus leading to decreased maintenance costs and increased safety for personnel, passengers, and property.
Owner:VOESTALPINE RAILWAY SYST GMBH +1

Switch rail with even distribution of hardness on both sides of the rail head and method of production thereof

This invention relates to the field of rail manufacturing technology, specifically disclosing a turnout rail with uniform hardness distribution on both sides of the rail head and its manufacturing method. The manufacturing method includes: online heat treatment of the rolled rail, which includes: an accelerated cooling stage: when the temperature of the rail top surface of the rolled rail is between 720 and 840°C, the rail top surface, the long leg side of the rail head, and the short leg side of the rail head are accelerated to 460 to 520°C, wherein the cooling rate of the rail top surface is 1.5 to 3.0°C / s, the cooling rate of the long leg side of the rail head is 2.0 to 3.0°C / s, the cooling rate of the short leg side of the rail head is 2.5 to 3.5°C / s, and the cooling rate difference between the short leg side and the long leg side of the rail head is 0.3 to 0.7°C / s; and an air cooling stage: the rail cooled in the accelerated cooling stage is air cooled to room temperature. This invention can produce turnout rails with uniform hardness distribution on both sides of the rail head, thereby improving the stability of turnout rails during service.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

Personal transportation system

The instant disclosure discloses a method of operating a personal ecosystem transportation system that includes receiving instructions to pick up either passengers or freight at a specific siding or terminal, transporting those passengers or freight to a specified siding or terminal using a self-contained electrically powered vehicle, controlling the vehicle from within the vehicle to eliminate the use of external control mechanisms for moving the vehicle from the main track to a siding, and scheduling and programming the vehicle control system to proceed to a charging siding once the current assignment is completed when the vehicle control system determines that the battery of the vehicle requires recharging.
Owner:TPT TECHNOLOGIES INC +5

A damage-resistant fork and point rail

The present invention discloses a damage-resistant fork-heel-point rail, comprising a short center rail overlap section, a fork-heel-point rail extension section and a fork-heel-point rail overlap section, wherein the fork-heel-point rail overlap section is arranged at the end of the fork-heel-point rail extension section, the short center rail overlap section overlaps the fork-heel-point rail overlap section, the contact surface of the short center rail overlap section with the fork-heel-point rail overlap section is provided with a planing deepening structure, and the contact surface of the fork-heel-point rail overlap section with the short center rail overlap section has an anti-wear reinforcement structure. The present invention can significantly increase the width of the tip of the fork-heel-point rail, thereby increasing its strength and anti-wear performance, and the effect is direct and obvious. In addition, the present invention can ensure that the track interruption distance does not increase, and has little impact on the stability of vehicle passing. The strength of the fork-heel-point rail is improved, and the rate of damage occurrence and development is reduced.
Owner:CHINA ACADEMY OF RAILWAY SCI CORP LTD +1

A laser cladding copper-based self-lubricating material, its preparation method and application

The present invention discloses a laser cladding copper-based self-lubricating material, its preparation method and application. By using the precursor combined with the laser cladding process, a well-structured copper-based self-lubricating cladding layer is prepared on the surface of the Q235 steel plate, enabling it to exhibit excellent anti-friction, anti-wear and anti-corrosion properties during service. It can avoid the disadvantages of traditional copper-based materials such as easy refraction, reflection and strong heat dissipation under laser, solve the defects of the cladding layer such as composition segregation, cracks, pores, inclusions, oxides, etc., and has the advantages of high energy density, dense cladding layer structure, high strength and hardness, good metallurgical bonding performance at the copper / steel interface, and easy automation, providing a feasible preparation method for the large-scale promotion of this material in the field of turnout slide plates.
Owner:XI AN JIAOTONG UNIV

Automatic turnout switching device for shield tunnel construction

The utility model relates to a shield tunnel construction turnout automatic switching device which comprises two first rails and two second rails, the two first rails are arranged in a tunnel in parallel and disconnected at the switching position, the two second rails are arranged in the tunnel in parallel and disconnected at the switching position, and the two first rails and the two second rails are vertically distributed; the fixing plate is mounted at the switch position between the two first rails and the two second rails; the circular rotating plate is installed on the fixed plate and can rotate relative to the fixed plate, two first auxiliary rails are installed on the circular rotating plate and arranged in parallel, and the distance between the two first auxiliary rails corresponds to the distance between the two first rails and the distance between the two second rails; and the driving motor is installed below the fixing plate, the output end of the driving motor penetrates through the fixing plate and is in driving connection with the circular rotating plate, the driving motor is used for driving the circular rotating plate to rotate, and the two first auxiliary rails can be in matched butt joint with the two first rails and the two second rails in the rotating process. According to the device, the vertically-distributed rail transport vehicle can be conveniently subjected to rail changing, automatic switching of the vertical turnout is achieved, the device is suitable for transportation of muck in a tunnel, and adaptability is improved.
Owner:SHENYANG SHIELD EQUIP ENG CO LTD +1

Switching device in rail turnout

The present invention relates to the technical field of rails, and proposes a conversion device in a rail switch, including a movable frame, which is movably arranged relative to the second straight rail, and has connecting parts at both ends, the two connecting parts are connected to the first point rail and the second point rail, and the movable frame is used to drive the first point rail and the second point rail to move synchronously; the bracket is fixed relative to the second straight rail; there are a number of swinging members, which are rotatably arranged on the bracket, and a number of swinging members are arranged at intervals, and one end of a swinging member is hinged to the movable frame; there are a number of sliding rods, which are slidably arranged on the bracket, and a number of sliding rods are arranged in parallel, and each sliding rod is hinged to each swinging member; there are a number of connecting members, which are respectively arranged on the third point rail and the fourth point rail, and the third point rail and the fourth point rail are respectively hinged to a swinging member through the connecting member. Through the above technical scheme, the problem that deformation may occur in the prior art when performing multi-station switching, resulting in the point rail not being switched into place, increasing the risk of derailment, is solved.
Owner:QINHUANGDAO SHANHAIGUAN RAILWAY MATERIAL CO LTD

Production method of elastic bendable switch rail for compound dividing turnout and switch rail assembly of elastic bendable switch rail

The invention relates to the technical field of switch rails, in particular to a production method of an elastic bendable switch rail for a compound dividing turnout, which comprises the following steps: determining the steel rail model of the switch rail according to the model of a stock rail; determining the machining range of the switch rail according to the steel rail model; precise cutting is conducted on the determined machining range through slicing machining, the horizontal inertia moment and the flexural rigidity of the switch rail are weakened, and an elastic bendable section is formed; the cut switch rail is subjected to precision verification; forging and pressing the point rail subjected to precision verification, and processing the section of the point rail into a common steel rail section consistent with that of the stock rail; the forged and pressed switch rail is cooled, straightened and detected, the switch rail produced through the method is stable and simple in structure, the problems that bolts are broken off, rail seams are eroded and the like are reduced, the reliability of the switch rail is improved, the service life of the switch rail is prolonged, and maintenance convenience of the switch rail is improved.
Owner:RAILWAY CONSTR RES INST OF CHINA ACAD OF RAILWAY SCI CO LTD +1

Movable point rail moving device

ActiveCN222908435URail switches
The utility model discloses a movable point rail moving device which comprises a bedplate assembly, the bedplate assembly comprises an upper bedplate, a lower bedplate and a rolling supporting assembly, the upper bedplate is used for being connected with the movable point rail assembly in a fastening mode, the lower bedplate is arranged below the upper bedplate, and the rolling supporting assembly is arranged below the upper bedplate. The rolling supporting assembly is arranged between the upper table plate and the lower table plate, and the upper table plate and the lower table plate can abut against each other to transfer force or can be separated from each other and move in a staggered mode under rolling supporting of the rolling supporting assembly. According to the movable point rail moving device, friction can be reduced, the movable point rail assembly is not prone to deformation when pulled, and therefore the displacement stroke of the movable point rail assembly can be guaranteed.
Owner:CHINA RAILWAY CONSTR HEAVY IND

Narrow-gauge common-rail conversion type nested-rail car turntable system within the tray

The present invention relates to the technical field of double-track railways, and provides a conversion type of turntable system for narrow and wide gauge common track within a turntable, which includes a turntable and also includes three tracks extending from the access end inside the turntable to the outside of the turntable. The three tracks are arranged at intervals in the same direction. The two outer tracks have a wide gauge, and the inner track has a narrow gauge. There is an annular track inside the turntable for the railway locomotive to rotate 180 degrees, and there is a set of two narrow and wide gauge common track conversion switches between the two ends of the line inside the turntable. The present invention adopts a turntable system for railway double-track with common track conversion inside the turntable to replace the traditional railway double-track triangle to realize the turning operation of railway locomotives with two gauges of wide and narrow gauges. Generally, a railway triangle covers an area of about 16,000 square meters, lays about 900 meters of double-track, and has 4 sets of double-track switches. However, the translation type of turntable in this patent only covers an area of 1,670 square meters, lays only 100 meters of double-track, and has one set of conversion switches. The land occupation is only 10.4% of that of the railway triangle, and the investment is only 30% of that of the railway triangle.
Owner:CHINA RAILWAY WUHAN SURVEY & DESIGN CO LTD

Forcible entry device for turnout frog cementing spacer iron and construction method

The invention discloses a forcible entry device for turnout frog cementing spacer iron, which comprises a jack and further comprises a support frame arranged above steel rails on two sides of the spacer iron; the vertical adjusting assembly is vertically and adjustably connected to the middle of the supporting frame; the fixing ring is hinged to the bottom of the vertical adjusting assembly; the jacking pieces are arranged at the rail waist positions of the steel rail working faces on the two sides correspondingly; wherein the two ends of the jack are connected with the jacking pieces on the corresponding sides respectively. According to the turnout frog cementing spacer iron breaking device, high-strength cement between a steel rail and spacer iron can be broken, the spacer iron and the steel rail are separated, the operation efficiency is improved, the problem that train transportation is affected by skylight delay points and responsibility assessment is caused is solved, the height of the jack can be adjusted, and the service life of the turnout frog is prolonged. The height difference of rail web positions of different types of steel rails is achieved, the applicability is wide, and the safety risk that hands and feet of operators are squeezed by sliding of a crowbar in traditional operation, and personal injury accidents are caused is eliminated.
Owner:QUJING PUBLIC WORKS SECTION OF CHINA RAILWAY KUNMING BUREAU GRP CO LTD

Tongue rail pull rod structure used for compound dividing turnout

The invention relates to the technical field of railway turnouts, in particular to a switch rail pull rod structure for a compound cross-section turnout, the pull rod structure comprises a pull rod assembly, the pull rod assembly comprises a first pull rod, a second pull rod and a clamping plate, and the end part of the first pull rod is in contact with the end part of the second pull rod; the clamping plate is arranged at the contact of the first pull rod and the second pull rod; the first end of the clamping plate is fixed to the first pull rod. The second end of the clamping plate is fixed to the second pull rod. Insulating sleeves sleeve the peripheries of the first pull rod and the second pull rod; an insulating pad is clamped between the contact surfaces of the first pull rod and the second pull rod; the connector structure comprises a connecting rod and a fixing piece, a clamping structure is arranged at the first end of the connecting rod, a clamping groove is formed in the clamping structure, and the clamping structure is connected with the tongue rail bottom through the clamping groove; the fixing piece is used for fixing the connecting rod and the switch rail bottom; the second end of the connecting rod is fixedly connected with one end of the first pull rod away from the second pull rod.
Owner:RAILWAY CONSTR RES INST OF CHINA ACAD OF RAILWAY SCI CO LTD +1

Movable core frog cementing spacer iron stripping device

The utility model discloses a movable core frog glue joint spacer iron stripping device which comprises a jack and a hand pump and further comprises a supporting top piece, at least one concave groove is formed in the lower portion of the inner side of a vertical rod of the supporting top piece, and the concave groove is used for being matched with a rail bottom in a clamped mode to complete work. The supporting plate is vertically connected to the outer side surface of the vertical rod of the supporting top piece; wherein the jack is installed on the supporting plate, one end of the jack is in abutting connection with the supporting ejecting piece, and the other end of the jack is in abutting connection with the steel rail or the spacer iron to complete stripping work of the non-abutting end of the steel rail or the spacer iron. The steel rail clamping device is ingenious in design, and the reliability and economical efficiency of a rail system can be improved while the requirement for stable clamping of the steel rail can be met; the appearance structure of the supporting jacking piece can be matched with different sizes of a long point rail, a straight strand wing rail, a curved strand wing rail and a fork heel switch rail, a vertical stress face is provided for the jack, and the acting force of the jack is transmitted to a steel rail through the supporting jacking piece.
Owner:QUJING PUBLIC WORKS SECTION OF CHINA RAILWAY KUNMING BUREAU GRP CO LTD