RU23078U1 - DEVICE FOR THERMAL PROCESSING OF RAIL LASHES - Google Patents

Description

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M1ZH7E01V31 / 18

1 DEVICE FOR THERMAL PROCESSING OF RAILWAYS A utility model relates to railway transport, namely, devices for heat treatment of rail lashes of a welded jointless path and can be used to control the process of heat treatment of welded rail joints in accordance with specified conditions in stationary conditions. Currently, for high-speed highways, a welded jointless track (maximum length of a rail lash of 800 meters) is becoming the main structure of the track’s upper structure on domestic and foreign railways. After welding 25 meter rails into an 800 meter lash at the welding site, the rail head is released to a hardness of 250 ... 270 HB. Such a rail lash has an intensive wear of the rail head at the welding site, and the bending strength of such a lash is also low. In order to give the head of the rail joint high wear resistance, and the neck and sole of the ductility, the joint must be heat treated accordingly. Attempts to solve this problem are found in a number of patent publications. A device for heating a rail lash 1. A device 1 comprises a heating chamber wound on a vehicle, which is a cavity formed by external and internal casings having a cross-sectional shape of a bracket covering a rail lash. LATTERIES Inside the chamber, on the sides along the rail, fs kunkis are installed with tangentially arranged nozzles providing the opposite direction of 1 foot of the spray gun, and their outlet nozzles are directed towards each other to the longitudinal axis of the chamber. The device 1 ensures the stability of the torch and the intensification of heating of the rail due to heat transfer by radiation from ceramics. However, the functionality of the known device 1, intended only for heating the rail, is limited and it cannot be used for heat treatment of welded butt rails, the technology of which involves heating the joint to a certain temperature and then cooling it to the required temperature. A device for heat treatment of rail lashes 2 is known, which comprises a vehicle, a camera mounted on it, covering the rail lash and including a collector, and nozzles mounted along the camera. The device also contains a source of air supply to the collector, a source of fuel supply to the nozzles and a source of coolant. In the chamber between the nozzles are installed with the possibility of axial movement of the air pipe connected with the collector. The nozzles are selectively connected to a fuel supply source or to a coolant supply source. The functionality of the device 2 is expanded in comparison with the above-described device 1, since the device 2 can operate both for heating the rail lash and for cooling it. However, the disadvantage of the device 2 is a wide heating zone, as well as uneven heating and the complexity of the design of the nozzle block. A device 3 is also known for low-temperature tempering of rails of jointless tracks after welding at the locations of these tracks, comprising a mobile railway vehicle with devices for supplying a working fluid to the heat treatment zone of each rail. Steam is used as a working fluid at a pressure of 10 MPa (100 kgf / cm2) with a temperature of 310 ° С. These devices are located above the track rails and include three perforated pipes with nozzles. The nozzles of the pipes located above the rail heads are installed in one row in the lower parts of these pipes with the alignment of the axis of symmetry of the nozzles with the axis of symmetry of the rails. Each of the outer and inner pipes is equipped with two rows of nozzles, the axis of symmetry of which are located at equal angles to the axis of symmetry of the rails. Pipes with nozzles along the entire length of each of the aforementioned devices are enclosed in rigid heat-shielding casings with the formation of gaps for the exhaust of steam equal to 10-15 mm between the lower edges of the casings and the base of the corresponding rail. A disadvantage of the known device 3 is the possibility of injury when working on the device, which is due to the use of steam under high pressure (100 kgf / cm) with a temperature of 310 ° C as a working fluid, as well as the complex design of the nozzle block, as in the device 2 described above. In addition, the known device 3, being mobile, is not intended for heat treatment of rail joints in stationary conditions. 1 The closest in its technical essence to the proposed utility model is a stationary induction installation described in literature 4, selected as a prototype. The known induction unit 4, as well as the claimed utility model, is intended for heat treatment of welds of rails, namely: hardening of the head and tempering of the sole and neck in stationary conditions. Induction unit 4 consists of a generator and a heating unit, which includes a capacitor bank, two transformer cabinets, two replaceable inductors, a nozzle block, a hydraulic cabinet, a pneumatic cabinet, and a control cabinet. The welding zone is heated by two inductors, which cover the rail on both sides. The transformer cabinet is a welded case in which a quenching transformer is installed. The quenching transformer serves to match the voltage of the inductor and the medium frequency power source. The transformer cabinet has the ability to rotate axle bearings, as well as move in the horizontal plane. Through nozzles mounted above the heating zone of the rail, water, air or a water-air mixture is supplied, which hardens the rail head. The operation of the installation 4 is controlled with the help of a control device located in the control cabinet mounted on the frame of the heating unit, and is intended for commissioning the installation and monitoring the heating mode. Signal lamps, control buttons, voltmeter, resistors are installed on the control cabinet door. Relays, switches, etc. are located on the inner panel of the cabinet. The control system of the installation is based on the V use of relay elements, the operation algorithm of which is implemented by the wiring diagram of the control cabinet. The control device is powered by a secondary power source. Remote non-contact temperature control is carried out using a pyrometric sensor. However, it should be noted the disadvantages of the known device, which are as follows: - lack of control over the process of heat treatment of the joint (practically in the device - prototype only current temperature control is carried out; - lack of the ability to register parameters of heat treatment of the joint; low reliability of coupling elements (relays, magnetic starters, etc. .) used in the control system of the device, as well as the bulkiness and complexity of the design of the ipsaf control and its large dimensions; The purpose of the proposed utility model is to expand the functionality of the device for heat treatment of rail lashes by constructing a heat treatment process control system that allows you to change the parameters of the heating and cooling process, correct them, as well as register and archive the resultant The objective of the utility model is also to simplify the design of the device while increasing the reliability and ease of operation . I

In order to achieve this technical result, a device is proposed for heat treatment of rail raids, which, like the one closest to it, selected as a prototype, contains a heating block consisting of a block of capacitors, the input of which is connected to a power source, and the outputs through quenching transformers are connected to the first inputs of inductors, and nozzle block. The nozzle block is connected to the first output of the control unit of the control device. The control device contains a secondary power source and a pyrometer sensor connected to the inputs of the control unit. The second output of the control unit is connected to a power source. A feature of the proposed utility model that distinguishes it from the known device for heat treatment of rail lashes 4, adopted as a prototype, is that the information storage and recording unit and the information display unit, which are connected to the third and fourth outputs of the control unit, are additionally introduced into the control device . The control unit is made in the form of a programmable controller, while its first output is connected to the second inputs of the inductors. The implementation of the tasks posed by the creation of the proposed utility model was made possible thanks to the following. The microprocessor control system of the proposed utility model was made on the basis of an industrial computer, with the help of which the following capabilities appeared: control of the process of heat treatment of the welded joint in accordance with preset modes; H adjustment of heat treatment parameters (if necessary). The solution of the tasks is also facilitated by the introduction into the control system of the device of new locks that are absent in the prototype, namely: an information storage and registration unit and an information display unit that allow: discrete control and recording of the parameters of the heat treatment process, as well as storage of recorded information about the parameters technological process of heat treatment of at least 3000. joints; test control of the installation parameters as a whole and its individual systems and nodes; diagnostics of the installation status and the display of error messages on the liquid crystal display; indication of the operating modes of the installation; recording heat treatment parameters with the possibility of transferring information to a personal computer for the purpose of printing and processing information, as well as storing it for the necessary time. As a result, the functionality of the proposed utility model has significantly expanded. Thus, the combination of the above features allows us to solve the tasks. The proposed utility model is illustrated by drawings, which depict: in FIG. 1 is a structural diagram of the proposed device; l in figure 2 - the proposed device for heat treatment of rail lashes (General view); in Fig.Z - heating block of the proposed device (General view); in Fig. 4 - heating block (top view). The device for heat treatment of rail lashes consists of a power source 1, which can be used as a generator of medium frequency T11CH-250 / 2,4, and a heating unit 2. The heating unit 2 of the device is built into the rail welding line and consists of a block of capacitors 3, two quenching transformers 4 and 5, located in transformer cabinets 6, 7 (see Fig. 3) and the nozzle block 8. The weld of the rail 9 (see Fig. 2) to be heat treated is introduced into the zone of detachable inductors 10, 11 installed in center of the heating block 2. In the operating position, the inductors 10, 11 cover the rail 9 from two sides. To install the inductors relative to the weld, the heating unit 2 can move along the rail to a distance of ± 1000 mm along the rail. To protect the sole and neck of the rail 9 from the ingress of coolant onto them, special dampers (not shown in Fig.) Are used, which are part of the nozzle block 8, which is made in the form of a monoblock. The operation of the device is controlled using the control device 12 from the control panel 13 installed on the transformer cabinet 6. The control panel 13 contains: an industrial computer 14, an information storage and recording unit 15, a liquid crystal display 16, as well as a secondary power source 17 and a pyrometric sensor 18.

industrial computer 14 performs the functions of diagnosing the condition of the entire device, controlling the process of heat treatment - heating and forced cooling of the head of the welded joints of the rails, recording and recording parameters. As an industrial computer, for example, a controller of the GLOFA-GM series, manufactured by LG INDUSTRIAL SYSTEMS (Korea), can be used. Pyrometric sensor 18, which can be used, for example, a Thermalert TX pyrometer, manufactured by Raytek (Germany), is used to measure the temperature of the weld during operation of the device and is connected to one of the inputs of an industrial computer 14. On the control panel 13 times; also devices for controlling the mechanisms of mixing; moving parts of the heating unit 2, monitoring, signaling and lighting of the inductors 10 and 11. Monitoring the operation of the mechanisms is carried out using contactless sensors located in the transformer cabinet 6. The actuators of the device are controlled by electromagnets and electromagnetic valves, also installed in the transformer cabinet 6 and connected to the output signals of the computer 14. Access to the control panel 13 is carried out from specially equipped platforms 19 and 20 (see Fig. 4).

The operation of the device is as follows.

The operator turns on the control panel 13 using the “PITAPIE” switch located on the control panel door.

Using the touch buttons on the display screen 16, the operator puts the controller 14 in the "SETUP" mode and sequentially sets the main parameters of the heat treatment modes - heating and quenching, as well as additional technological parameters of the automatic cycle of the mechanisms of the heating unit 2. Next, the operator puts the controller 14 in the "WORK" mode and checks the readiness of individual units and installation elements to work. After the “INSTALLATION IS READY” display on the display screen 16, the operator presses the “START CYCLE” button and then the system operates automatically in accordance with a predetermined sequence diagram, which is programmed into the controller. During the automatic cycle, the operator can directly observe and monitor the main technological processes on the display screen 16 heat treatment parameters (power, heating time and temperature, air and water supply time). At the end of the cycle, on the display screen 16, it is possible to control all the heat treatment parameters, including the temperature graph of a given rail junction, as well as previous joints. All information about the heat treatment parameters of the rail joints is accumulated in the information storage and recording unit 15. If necessary, the above-mentioned unit is removed from the control panel 13 and transferred to a stationary household personal computer, into which all the accumulated information is read using a special program. Thus, the proposed utility model, thanks to the introduction of a microprocessor control and monitoring system based on an industrial computer, provided:

discrete control and registration of parameters of the heat treatment technological process (volume heating and forced cooling) with filling in the joint passport;

storage of recorded information about processed joints;

test control of the installation parameters as a whole and its individual systems and nodes;

search and signaling of installation malfunctions;

indication of the operating modes of the installation.

USED SOURCES:

1.Aut. testimonial. 1576612, cl. ЕВВ 31/18, op. 07.07.07.

2.Aut. testimonial. 1615270, class ЕВВ 31/18, op. 23 .12. 90.

3. RF patent No. 2128759, cl. ЕВВ 31/18, op. 04/10/99.

4. Installation induction ITT 3-250 / 2,4. Technical Description, (sheets 1-17), 1994 - prototype.

Claims (1)

A device for heat treatment of rail lashes, containing a heating unit consisting of a block of capacitors, the input of which is connected to a power source, and the outputs through quenching transformers are connected to the first inputs of the inductors, and a nozzle block connected to the first output of the control unit of the control device containing a secondary power source and a pyrometer sensor connected to the inputs of the control unit, the second output of which is connected to a power source, characterized in that flax administered storage unit and recording information and a display unit connected to third and fourth outputs of the control unit accordingly, the control unit is designed as a programmable controller, with its first output connected to second inputs of inductors.