CN117005254A - A combined rail maintenance method - Google Patents

Abstract

The application provides a combined steel rail maintenance method, which comprises the following steps: s10, evaluating the disease degree of the steel rail in the same steel rail maintenance interval, and dividing the evaluated disease degree of the steel rail into: mild, moderate and severe disease; s20, determining maintenance modes of all parts in a steel rail maintenance interval according to the disease degree of the steel rail; the method specifically comprises the following steps: the method comprises the steps of maintaining mild damage of a steel rail by adopting a passive circumferential polishing method, maintaining moderate damage of the steel rail by adopting an active end surface polishing method, and maintaining severe damage of the steel rail by adopting a milling method; s30, maintaining the steel rail in any combination mode of a passive circumferential polishing method, an active end surface polishing method and a milling method; the method has the beneficial effects of improving the treatment effect of the rail diseases, improving the comprehensive maintenance efficiency of the rail and the like; the method is suitable for the technical field of railway mechanical design and manufacture.

Description

A combined rail maintenance method

Technical field

This application relates to the technical field of railway machinery design and manufacturing, and specifically to a combined rail maintenance method.

Background technique

During the operation of railway vehicles, due to the wheel-rail relationship between railway vehicles and rails, fatigue hardening gradually occurs on the surface of the rails, which intensifies over time, and gradually evolves into corrugation, hardening cracks, side wear, fat edges, and peeling off. Damages such as blocks or even broken rails bring huge safety hazards to the normal operation of the railway, and bring great challenges to the treatment of rail diseases.

At present, depending on the degree of rail disease, the existing rail disease treatment methods mainly include: rail milling technology for severe diseases such as peeling off pieces, heavy fat edges, heavy corrugation and other damages; rail milling technology for moderate diseases such as hardening cracks, Active end grinding technology is used for damage such as corrugation and mild fat edges; passive circumferential high-speed grinding technology is used for mild damage such as superficial fish scales and corrugation.

The existing rail maintenance technology is mainly reflected in the "one-to-one" maintenance method, that is, using a single maintenance technology to perform dedicated rail maintenance operations on the rails. For example, for severely damaged rails, rail milling machines are used to repair the rails. Diseases; For rails with moderate disease, traditional end grinding machines are used to treat the diseases; for rails with mild diseases, high-speed grinding machines using the principle of passive circumferential grinding are used to repair the diseases. Although this kind of maintenance method is effective, it also has obvious flaws: the rails on the same line are inconsistent due to the wheel-rail relationship, so the degree of disease in different sections is also different, and rail milling, traditional end grinding, rapid After polishing exceeds the depth of the disease that is suitable for treatment, the operating efficiency will be significantly reduced. For example, when rapid grinding is used for the maintenance of moderate and severe diseases, the number of grinding passes required is many times higher than that of preventive grinding, and the average operating speed will be significantly reduced; if traditional grinding is used for preventive grinding, it will The operating speed is much lower than rapid grinding, and the efficiency is also far lower than rapid grinding. Due to its own technical characteristics, the rail milling car has low operating speed and cannot effectively deal with superficial diseases.

In addition, the laying and operating mileage of rails is usually long, ranging from dozens of kilometers to thousands of kilometers, and the number and length of operating "skylight points" are quite limited. The traditional "one-to-one" rail maintenance method cannot At the same time, it is difficult to effectively treat mild, moderate, and severe rail diseases, but it is difficult to meet the efficiency requirements for comprehensive rail disease treatment on long-distance lines.

Contents of the invention

In order to solve one of the above technical defects, this application provides a combined rail maintenance method.

This application provides a combined rail maintenance method, including the following steps:

S10, within the same rail maintenance interval, evaluate the degree of disease of the rail, and divide the evaluated degree of disease into: mild disease, moderate disease and severe disease;

S20, determine the maintenance method for each part of the rail maintenance interval according to the degree of rail disease; specifically include: using passive circumferential grinding method for maintenance of mildly diseased parts of the rail, and using active end grinding method for moderately damaged parts of the rail Maintenance, use milling method to maintain the severely damaged rails;

S30, maintain rails through any combination of passive circumferential grinding method, active end grinding method and milling method.

Preferably, in S30, the rails are maintained through any combination of the passive circumferential grinding method, the active end grinding method and the milling method, specifically including: track maintenance for mildly damaged, moderately damaged and severely damaged areas. The intervals are maintained using passive circumferential grinding method, active end grinding method and milling method.

Preferably, in S30, the rails are maintained through any combination of passive circumferential grinding method, active end grinding method and milling method, which specifically includes the following steps:

S301, first use active end grinding and milling methods to rectify the moderately damaged and severely damaged rails in the track maintenance area;

S302, after the rails with moderate and severe disease have been repaired, the passive circular grinding method is used to grind the entire rail section until the grinding operation is completed, thereby completing the maintenance of the rails.

Preferably, in S30, the rails are maintained through any combination of passive circumferential grinding method, active end grinding method and milling method, which specifically includes the following steps:

S303, first use the passive circular grinding method to grind the entire section of the rail until all the mildly damaged parts of the rail are grinded in place;

S304, after the rails with mild disease are polished, the remaining moderately damaged areas in the track maintenance area are ground using the active end grinding method, and the remaining severely damaged areas are milled using the milling method until the grinding and milling operations are completed. , and then complete the maintenance of the rails.

Preferably, the degree of damage to the rail can be evaluated by the damage depth of the rail.

More preferably, when the damage depth of the rail is ≤0.2mm, the degree of disease of the rail is mild; when the damage depth of the rail is between 0.2mm~0.5mm, the degree of damage of the rail is The degree of disease is moderate; when the damage depth of the rail is ≥0.5mm, the degree of disease is severe.

Preferably, the passive circumferential grinding method uses passive circumferential grinding equipment for grinding, the active end surface grinding method uses active end surface grinding equipment for grinding, and the milling method uses rail milling equipment for milling.

Preferably, the passive circumferential grinding equipment is one of the HSG-city type, HSG-2S type, and GKMC-24 type high-speed grinding vehicles.

Preferably, the active end surface grinding equipment is one of the GMC-96 and GMC-20 rail grinding vehicles.

Preferably, the rail milling equipment is one of the MM-1000, MG31, SF02, and FGM rail milling machines.

The combined rail maintenance method provided by this application can target different degrees of rail diseases. This method effectively improves the efficiency of rail maintenance by dynamically combining passive circumferential grinding, active end grinding, milling and other rail disease treatment methods, and improves the efficiency of rail maintenance. The remediation effect of rail diseases has improved the overall efficiency of rail remediation. In addition, it has effectively reduced the occupancy rate of "skylights" and improved the operating efficiency of rails.

Description of the drawings

The drawings described here are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the attached picture:

Figure 1 is a flow chart of a combined rail maintenance method provided by an embodiment of the present application;

Figure 2 is a schematic diagram of rail grinding by passive circumferential grinding equipment provided by the embodiment of the present application;

Figure 3 is a schematic diagram of rail grinding by active end surface grinding equipment provided by the embodiment of the present application;

Figure 4 is a schematic diagram of rail milling by the rail milling equipment provided by the embodiment of the present application;

In the picture: 10 is the passive circumferential grinding equipment, 20 is the active end grinding equipment, and 30 is the rail milling equipment.

Detailed ways

In order to make the technical solutions and advantages in the embodiments of the present application clearer, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application. This is not an exhaustive list of all embodiments. It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other.

In the process of realizing this application, the inventor found that providing a combined rail maintenance method that can reduce the "skylight" occupancy rate and improve the comprehensive maintenance efficiency of the rail is an urgent problem that needs to be solved.

Figure 1 is a flow chart of a combined rail maintenance method provided by an embodiment of the present application. As shown in Figure 1, to address the above problems, an embodiment of the present application provides a combined rail maintenance method, which includes the following steps:

S10, within the same rail maintenance interval, evaluate the degree of disease of the rail, and divide the evaluated degree of disease into: mild disease, moderate disease and severe disease;

S20, determine the maintenance method for each part of the rail maintenance interval according to the degree of rail disease; specifically include: using passive circumferential grinding method for maintenance of mildly diseased parts of the rail, and using active end grinding method for moderately damaged parts of the rail Maintenance, use milling method to maintain the severely damaged rails;

S30, maintain rails through any combination of passive circumferential grinding method, active end grinding method and milling method.

The combined rail maintenance method provided in the embodiments of this application can target different degrees of rail diseases. This method effectively improves the efficiency of rail maintenance by dynamically combining passive circumferential grinding, active end grinding, milling and other rail disease treatment methods. , improves the effect of rail disease treatment and improves the comprehensive rail management efficiency. In addition, it also effectively reduces the occupancy rate of "skylights" and improves rail operation efficiency.

Furthermore, in S30, the rails are maintained through any combination of the passive circumferential grinding method, the active end grinding method and the milling method, specifically including: track maintenance of mildly damaged, moderately damaged and severely damaged areas. The sections are maintained using passive circumferential grinding method, active end grinding method and milling method respectively, which can effectively treat mild, moderate and severe rail diseases at the same time, meeting the demand for comprehensive treatment of rail diseases on long-distance lines.

Furthermore, in S30, the rails are maintained through any combination of passive circumferential grinding method, active end grinding method and milling method, which specifically includes the following steps:

S301, first use active end grinding and milling methods to rectify the moderately damaged and severely damaged rails in the track maintenance area;

S302, after the rails with moderate and severe disease have been repaired, the passive circular grinding method is used to grind the entire rail section until the grinding operation is completed, thereby completing the maintenance of the rails.

In the above method, the active end grinding method and milling method are first used to rectify the rail defects, which will cause defects such as knife marks, residual corrugation, grinding transition edges, and regenerative corrugation. Then the passive circumferential grinding method is used to repair the entire area. Grinding a section of rail can not only cure minor diseases, but also eliminate these defects, thereby restoring the rail to a better condition.

Furthermore, in S30, the rails are maintained through any combination of passive circumferential grinding method, active end grinding method and milling method, which specifically includes the following steps:

S303, first use the passive circular grinding method to grind the entire section of the rail until all the mildly damaged parts of the rail are grinded in place;

S304, after the rails with mild disease are polished, the remaining moderately damaged areas in the track maintenance area are ground using the active end grinding method, and the remaining severely damaged areas are milled using the milling method until the grinding and milling operations are completed. , and then complete the maintenance of the rails.

Furthermore, the degree of rail disease can be evaluated by the damage depth of the rail.

Specifically, when the damage depth of the rail is ≤0.2mm, the rail's disease degree is mild; when the rail's damage depth is between 0.2mm~0.5mm, the rail's disease is moderate; when the rail's damage depth is between 0.2mm~0.5mm, the rail's disease is moderate. When the damage depth is ≥0.5mm, the rail is severely damaged.

In specific implementation, the method of assessing the degree of rail disease is not restricted, as long as the degree of rail disease is evaluated.

Specifically, a comprehensive assessment can be made based on the severity and distribution of rail diseases and the operating capabilities of grinding or milling equipment.

Figure 2 is a schematic diagram of rail grinding by passive circumferential grinding equipment provided by an embodiment of the present application. Figure 3 is a schematic diagram of rail grinding by an active end-face grinding equipment provided by an embodiment of this application. Figure 4 is a schematic diagram of rail milling by rail milling equipment provided by an embodiment of this application. , as shown in Figures 2 to 4, further, the passive circumferential grinding method uses a passive circumferential grinding equipment 10 for grinding, the active end face grinding method uses an active end face grinding equipment 20 for grinding, and the milling method uses a rail milling equipment 30 for milling. .

The grinding wheel in the passive circumferential grinding equipment in this application has no rotational power. During operation, the circumferential surface of the grinding wheel is in rigid contact with the rail, and the rolling and sliding composite friction generated drives the grinding wheel to rotate, thereby achieving grinding; active end face The grinding wheel in the grinding equipment has its own rotational driving force, such as motor drive. During operation, grinding can be achieved through rigid sliding friction between the end face of the grinding wheel and the rail; the milling equipment can mill the damaged areas of the rail through the milling cutter.

Specifically, the passive circumferential grinding equipment 10 is one of the HSG-city type, HSG-2S type, and GKMC-24 type high-speed grinding vehicles.

Specifically, the active end surface grinding equipment 20 is one of the GMC-96 type and GMC-20 type rail grinding vehicles.

Specifically, the rail milling equipment 30 is one of the MM-1000, MG31, SF02, and FGM rail milling machines.

In the description of this application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The directions or positional relationships indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings. The positional relationship is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In this application, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be mechanical connection, electrical connection or mutual communication; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Although the preferred embodiments of the present application have been described, those skilled in the art will be able to make additional changes and modifications to these embodiments once the basic inventive concepts are apparent. Therefore, it is intended that the appended claims be construed to include the preferred embodiments and all changes and modifications that fall within the scope of this application.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (10)

1. The combined steel rail maintenance method is characterized by comprising the following steps of:

s10, evaluating the disease degree of the steel rail in the same steel rail maintenance interval, and dividing the evaluated disease degree of the steel rail into: mild, moderate and severe disease;

s20, determining maintenance modes of all parts in a steel rail maintenance interval according to the disease degree of the steel rail; the method specifically comprises the following steps: the method comprises the steps of maintaining mild damage of a steel rail by adopting a passive circumferential polishing method, maintaining moderate damage of the steel rail by adopting an active end surface polishing method, and maintaining severe damage of the steel rail by adopting a milling method;

and S30, maintaining the steel rail by any combination of a passive circumferential polishing method, an active end surface polishing method and a milling method.

2. The combined steel rail maintenance method according to claim 1, wherein in S30, the steel rail is maintained by any combination of a passive circumferential grinding method, an active end surface grinding method and a milling method, and the method specifically comprises: and maintaining the track maintenance intervals at the positions of mild diseases, moderate diseases and severe diseases by adopting a passive circumferential polishing method, an active end surface polishing method and a milling method respectively.

3. The combined steel rail maintenance method according to claim 1, wherein the steel rail is maintained in S30 by any combination of a passive circumferential grinding method, an active end face grinding method and a milling method, and specifically comprises the following steps:

s301, firstly, repairing the steel rail with moderate and severe diseases in a track maintenance interval by adopting an active end face polishing method and a milling method respectively;

s302, after the repair of the steel rail with moderate and severe diseases is completed, polishing the steel rail in the whole section by adopting a passive circumferential polishing method until polishing operation is completed, and further completing the maintenance of the steel rail.

4. The combined steel rail maintenance method according to claim 1, wherein the steel rail is maintained in S30 by any combination of a passive circumferential grinding method, an active end face grinding method and a milling method, and specifically comprises the following steps:

s303, polishing the whole section of steel rail by adopting a passive circumferential polishing method until the mild lesions of the steel rail are polished in place;

and S304, after the steel rail with the mild disease is polished, polishing the residual moderate disease in the track maintenance interval by adopting an active end surface polishing method, and milling the residual severe disease by adopting a milling method until polishing and milling operations are completed, thereby completing the maintenance of the steel rail.

5. A method of maintaining a composite rail according to claim 1, wherein the extent of damage to the rail is assessed by the depth of damage to the rail.

6. The method for maintaining a combined steel rail according to claim 5, wherein when the flaw depth of the steel rail is less than or equal to 0.2mm, the degree of damage of the steel rail is mild damage;

when the damage depth of the steel rail is between 0.2mm and 0.5mm, the disease degree of the steel rail is moderate disease;

when the damage depth of the steel rail is more than or equal to 0.5mm, the disease degree of the steel rail is a heavy disease.

7. A combined rail maintenance method according to any one of claims 1-4, characterized in that the passive circumferential grinding method is performed with a passive circumferential grinding device (10), the active end face grinding method is performed with an active end face grinding device (20), and the milling method is performed with a rail milling device (30).

8. The method for maintaining a combined steel rail according to claim 7, wherein the passive circumferential grinding equipment (10) is one of a high-speed grinding vehicle of the type HSG-city, HSG-2S and GKMC-24.

9. The method of claim 7, wherein the active end face grinding device (20) is one of GMC-96 type and GMC-20 type rail grinding vehicle.

10. The method of claim 7, wherein the rail milling equipment (30) is one of MM-1000 type, MG31 type, SF02 type, FGM type rail milling machines.