CN-116465453-B - Method and system for monitoring crawling and close force of switch tongue and external locking device

CN116465453BCN 116465453 BCN116465453 BCN 116465453BCN-116465453-B

Abstract

The invention belongs to the technical field of rail transit, and discloses a method and a system for monitoring crawling and close contact force of a switch tongue and an external locking device, wherein the method comprises the steps that when a tongue connecting iron and a connecting iron seat are subjected to relative displacement, a magnetic field induction sensor converts the number of acquired magnetic grids passing through a magnetic grid ruler and a magnetic pick-up sequence into magnetic signals; when the lock hook component pushes the connecting iron seat, the optical fiber pin type sensor converts the force received by the optical fiber pin type sensor into an optical fiber signal, processes the magnetic signal to obtain the creeping quantity of the switch rail and the outer locking device, and processes the optical fiber signal to obtain the switch close force. The sensing unit is arranged on the existing external locking device, holes are not required to be drilled on a ballast bed and a track, other instruments and sensing equipment are arranged, and the method is simple and convenient to install and simple to construct. The invention realizes the simultaneous monitoring of the creeping amount and the closely-adhering force of the switch rail and the outer locking device.

Inventors

ZHANG LIANG
ZHOU YAFU
XU MING
CHEN HAO
LI YUFEI
LI JI
LIU ZHENHUA

Assignees

北京全路通信信号研究设计院集团有限公司

Dates

Publication Date: 20260508
Application Date: 20230314

Claims (4)

1. The method for monitoring the crawling and close contact force of the switch tongue and the external locking device is characterized by comprising the following steps: when the switch rail connecting iron and the connecting iron seat are relatively displaced, the magnetic field induction sensor converts the acquired number of magnetic grids passing through the magnetic grid ruler and the magnetic pick-up sequence into magnetic signals, wherein the magnetic grid ruler is arranged on the switch rail connecting iron, and the magnetic field induction sensor is arranged on the connecting iron seat; when the lock hook component pushes the connecting iron seat, the optical fiber pin type sensor converts the force received by the optical fiber pin type sensor into an optical fiber signal, wherein the optical fiber pin type sensor is arranged in a pin hole on the connecting iron seat, and the lock hook component is connected with the connecting iron seat through the optical fiber pin type sensor; the method comprises the steps of converting a magnetic signal from a magnetic field induction sensor into a first digital electrical signal, and processing the first digital electrical signal to obtain crawling distance information and crawling direction information of the switch rail and the outer locking device; The optical fiber signal is processed to obtain the switch close force, which comprises the steps of converting the optical fiber signal of the optical fiber pin sensor into a second digital quantity electric signal, and processing the second digital quantity electric signal to obtain the switch close force; Determining the data relationship between the crawling amount of the switch rail and the external locking device and the switch close force according to the crawling amount of the switch rail and the external locking device and the obtained switch close force; Generating a data curve of the crawling quantity and time of the switch rail and the outer locking device according to crawling distance information and crawling direction information of the switch rail and the outer locking device obtained in real time; and generating a data curve of the switch close force and time according to the switch close force obtained in real time.
2. The method of monitoring the creep and contact force of a switch tongue and outer locking device according to claim 1, further comprising the steps of: When the crawling distance of the switch rail and the outer locking device exceeds a set value and/or when the contact force of the switch rail exceeds the set value, alarming is carried out through voice and/or optical signals, and text information of maintenance warning is sent to maintenance personnel.
3. The track switch tongue and outer locking device crawling and close force monitoring system is characterized by comprising a magnetic grating ruler, a magnetic field induction sensor, an optical fiber pin sensor and a data transmission processing device; The magnetic field induction sensor is used for converting the acquired number of magnetic grids passing through the magnetic grid ruler and the magnetic pick-up sequence into magnetic signals when the switch rail connecting iron and the connecting iron seat are relatively displaced, wherein the magnetic grid ruler is arranged on the switch rail connecting iron, and the magnetic field induction sensor is arranged on the connecting iron seat; The optical fiber pin type sensor is used for converting the force received by the optical fiber pin type sensor into an optical fiber signal when the lock hook assembly pushes the connecting iron seat, wherein the optical fiber pin type sensor is arranged in a pin hole on the connecting iron seat, and the lock hook assembly is connected with the connecting iron seat through the optical fiber pin type sensor; The data transmission processing device is used for processing the received magnetic signals to obtain the creeping quantity of the switch rail and the external locking device, and is also used for processing the received optical fiber signals to obtain the switch close contact force; the system also comprises an on-line remote monitoring system, wherein the on-line remote monitoring system is used for determining the data relationship between the crawling amount of the switch rail and the external locking device and the switch close force according to the crawling amount of the switch rail and the external locking device and the obtained switch close force; The on-line remote monitoring system is also used for generating a data curve of the crawling quantity and time of the switch rail and the outer locking device according to the crawling distance information and the crawling direction information of the switch rail and the outer locking device obtained in real time; the on-line remote monitoring system is also used for generating a data curve of the switch close force and time according to the switch close force acquired in real time; The data transmission processing device comprises an acquisition transmission unit and a handheld terminal; The acquisition and transmission unit is used for converting the magnetic signals acquired from the magnetic field induction sensor into first digital quantity electric signals and transmitting the first digital quantity electric signals to the handheld terminal through a wireless network; The acquisition and transmission unit is also used for converting the optical fiber signals acquired from the optical fiber pin sensor into second digital electrical signals and transmitting the second digital electrical signals to the handheld terminal through a wireless network; The handheld terminal is used for processing the received first digital quantity electric signals, acquiring crawling distance information and crawling direction information of the switch rail and the outer locking device, and displaying the crawling distance information and the crawling direction information; The handheld terminal is also used for processing the received second digital quantity electric signal, obtaining the switch close contact force and displaying.
4. A switch point rail and outer locking device creep and adhesion monitoring system as claimed in claim 3, characterized in that the on-line remote monitoring system is also adapted to alarm by voice and/or light signals and send a maintenance warning text message to maintenance personnel when the creep distance of the point rail and outer locking device exceeds a set value and/or when the switch point adhesion exceeds a set value.

Description

Method and system for monitoring crawling and close force of switch tongue and external locking device Technical Field The invention belongs to the technical field of rail transit, and particularly relates to a method and a system for monitoring crawling and close contact force of a switch tongue and an external locking device. Background The turnout is a line device applied when rolling stock is transferred from one track to the other track, is an essential track device for realizing the line transfer or the line crossing operation of a train, is a weak link of driving equipment, has the characteristics of complex structure, large load, shorter service life, large maintenance and repair investment and the like, and becomes one of key technologies for limiting the operation speed of the train. Point closure means that in normal operating conditions the point rail 102 in the opening direction is tightly closed against the inside of the stock rail 101, i.e. the switch closure, as shown in fig. 1, a switch comprises stock rail 101, point rail 102, wing rail 103 and point rail 104, and after the point rail 102 and stock rail 101 have been locked, point rail 102 is closed against stock rail 101. At this time, the pressure of the point rail 102 against the stock rail 101 is the point rail contact force. Ideally, the tangential plane of the point rail 102 exactly matches the contact plane of the stock rail 101, and the point rail 102 is just in contact with the stock rail 101 but no pressure is generated. However, in actual operation, the contact surfaces of the tongue 102 and the stock rail 101 cannot be completely matched, and after the switch is operated for a long time, the rail is deformed due to roadbed or other reasons, so that the tongue 102 must be closely contacted with the stock rail 101 under a certain pressure in order to ensure that the tongue and the stock rail can be completely contacted. The point rail contact force should be within a certain range, and too large is detrimental to the ballast bed and the switching equipment and too small is detrimental to safety. The track point creeping amount refers to the longitudinal displacement of the switch track point 102 relative to the stock rail 101, the track point 102 and the stock rail 101 can expand with heat and contract with cold under different temperature conditions, a front-back telescopic creeping effect of the track point 102 relative to the stock rail 101 is generated, when the track point 102 is severely telescopic and creeping, an external locking device connected with the track point 102 can also displace along with the track point 102, so that the normal working state of the external locking is influenced, and even the switch switching failure is caused. The too big volume of creeping of switch rail 102 easily appears the trouble such as switch running indication, switch card and hinders, and the too big volume of creeping of outer locking device can lead to switch conversion equipment card to hinder, can't change switch rail 102 in place, all can influence train operation. Poor switch close adhesion can lead to train unstability, and serious time can lead to train derailment accident, can cause great economic loss and personal safety accident, influences railway operation safety. Therefore, the method has great significance for real-time monitoring of the switch rail 102, the external locking creeping quantity and the switch close state. In the prior art, patent application CN110160679a discloses a method and a system for detecting the close force of a railway switch, a close force sensor is arranged between a closed iron and a locking frame, and the method for detecting the close force is disclosed, but the real-time monitoring of the close force cannot be realized. In the prior art, patent application CN209945601U discloses an adjustable gap close-fitting force sensor, which is installed between the switch rail and the stock rail, and cannot meet the requirement of on-site long-term monitoring environment. In the prior art, patent application CN113136752a discloses a calibration device and method for a point rail crawling and close contact gap measuring device, which discloses a close contact force detecting device, wherein the installation of the device needs to be perforated on a track, and the device is installed beside the track, so that the device has a complex structure, is complicated to install, is greatly interfered by an outdoor environment, and cannot meet the requirement of on-site long-term monitoring. In summary, the prior art cannot detect the data relationship between the creeping amount of the switch rail and the external locking device and the contact force of the switch, and all the related sensing units are required to be installed beside the switch rail and the basic rail, so that the installation is complex, and the long-term use stability in the field is poor. Disclosure of Invention Aiming at the problems, the