WO2020253081A1

WO2020253081A1 - Pantograph and control method therefor, and electric locomotive

Info

Publication number: WO2020253081A1
Application number: PCT/CN2019/119077
Authority: WO
Inventors: 唐颂歌; 陈玉芬; 金磊
Original assignee: 中车大同电力机车有限公司
Priority date: 2019-06-18
Filing date: 2019-11-18
Publication date: 2020-12-24
Also published as: CN111907334A

Abstract

A pantograph control method, a pantograph and an electric locomotive. The pantograph control method comprises: raising a pantograph so that the pantograph is in contact with a catenary and receives current, and the contact pressure between the pantograph and the catenary is a first pressure; detecting a current system of the catenary; and controlling a valve plate (220) of the pantograph according to the detected current system to adjust the air flow of compressed gas for raising the pantograph so as to adjust the contact pressure between the pantograph and the catenary. The pantograph control method enables the pantograph and the electric locomotive to receive current under a plurality of current systems, which not only reduces the number of pantographs, but also improves the versatility of electric locomotives in different regions.

Description

Pantograph and its control method, electric locomotive

Technical field

The present disclosure relates to the technical field of locomotives, in particular to a pantograph control method, a pantograph and an electric locomotive.

Background technique

In recent years, with the rapid development of the railway transportation industry, electric locomotives that drive or push railway vehicles have also developed rapidly. Among them, the pantograph is installed on the roof of the electric locomotive and contacts the catenary to receive current to obtain the electric energy required for the operation of the electric locomotive.

Since the current systems of the catenary in different regions are not the same, and different current systems have different requirements for the pantograph of electric locomotives, a single model of pantograph cannot meet the needs of electric locomotives for cross-regional operation. Transportation brings great inconvenience.

In related technologies, different types of pantographs are usually installed on the roof of electric locomotives, which makes the roof equipment complicated and has a high failure rate.

The above-mentioned information disclosed in the background section is only used to enhance the understanding of the background of the present disclosure, so it may include information that does not constitute related technologies known to those of ordinary skill in the art.

Summary of the invention

The purpose of the present disclosure is to provide a pantograph control method, a pantograph, and an electric locomotive, so as to overcome one or more problems caused by the limitations and defects of related technologies to at least a certain extent.

In order to achieve the above disclosure objectives, the present disclosure adopts the following technical solutions:

According to one aspect of the present disclosure, there is provided a pantograph control method, including:

Raise the pantograph so that the pantograph is in contact with the catenary and receives current, and the contact pressure between the pantograph and the catenary is the first pressure;

Detecting the current system of the contact net;

The valve plate of the pantograph is controlled according to the detected current system to adjust the flow rate of the compressed gas for lifting the bow to adjust the contact pressure between the pantograph and the catenary.

In an exemplary embodiment of the present disclosure, before the detection of the current system of the catenary, it is assumed that the current system is an AC mode.

In an exemplary embodiment of the present disclosure, the valve plate of the pantograph is controlled to adjust the flow rate of the compressed gas for lifting the bow according to the detected current mode, so as to adjust the pantograph and the contact The contact pressure between the nets includes:

When the detected current system is the AC mode, the flow rate of the compressed gas passing through the valve plate is kept unchanged, so as to keep the contact pressure between the pantograph and the catenary as the first pressure;

When the detected current mode is the direct current mode, control the valve plate to increase the flow rate of the compressed gas for bow lifting, and make the contact pressure between the pantograph and the catenary a second pressure ；

Wherein, the second pressure is greater than the first pressure.

In an exemplary embodiment of the present disclosure, the valve plate of the pantograph is controlled to adjust the flow rate of compressed gas according to the detected current mode to adjust the pantograph and the contact After the contact pressure between the nets, the pantograph control method further includes:

Confirm that the current system matches the first pressure/the second pressure.

According to another aspect of the present disclosure, there is provided a pantograph, including:

The bow head has a sliding plate that can contact the contact net and receive flow;

A bow-lifting component connected to the bow head, the bow-lifting component has a valve plate, and the valve plate can adjust the flow rate of the compressed gas for bow-lifting to raise or lower the bow head;

A current system detector for detecting the current system of the contact net;

A controller, connected to the current system detector, is used to control the valve plate to adjust the flow rate of the compressed gas for bow lifting according to the current system, so as to adjust the contact pressure between the sliding plate and the contact net.

In an exemplary embodiment of the present disclosure, the number of the sliding plates is four.

In an exemplary embodiment of the present disclosure, the bow raising assembly includes:

Chassis

The hinge structure includes an upper arm and a lower arm rotatably connected with the upper arm, the upper arm is connected to the bow head, and the lower arm is connected to the base frame;

The driving member is arranged on the bottom frame and is used to drive the upper arm and the lower arm to rotate so as to control the bow head to raise or lower.

In an exemplary embodiment of the present disclosure, the side of the bottom frame is provided with a guide copper bar.

In an exemplary embodiment of the present disclosure, a copper stranded wire is connected between the upper arm and the lower arm.

According to another aspect of the present disclosure, an electric locomotive is provided, including the pantograph described in any one of the above.

Description of the drawings

The drawings herein are incorporated into the specification and constitute a part of the specification, show embodiments that conform to the disclosure, and together with the specification are used to explain the principle of the disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Fig. 1 is a flowchart of a pantograph control method according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a pantograph according to an embodiment of the present disclosure.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms, and should not be construed as being limited to the examples set forth herein; on the contrary, the provision of these embodiments makes the present disclosure more comprehensive and complete, and fully conveys the concept of the example embodiments To those skilled in the art. The described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to give a sufficient understanding of the embodiments of the present disclosure.

The described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to give a sufficient understanding of the embodiments of the present disclosure. However, those skilled in the art will realize that the technical solutions of the present disclosure can be practiced without one or more of the specific details, or other methods, components, materials, etc. can be used. In other cases, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the main technical ideas of the present disclosure.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used in this specification only for convenience, for example, according to the drawings. The direction of the example described. It can be understood that if the device of the icon is turned over and turned upside down, the "upper" component will become the "lower" component. Other relative terms, such as "high", "low", "top", "bottom", "left" and "right" have similar meanings.

When a structure is “on” another structure, it may mean that a certain structure is integrally formed on another structure, or that a certain structure is “directly” arranged on another structure, or that a certain structure is “indirectly” arranged on another structure through another structure. On other structures. The terms "a", "a", and "the" are used to indicate the presence of one or more elements/components/etc.; the terms "include" and "have" are used to indicate open-ended inclusion and mean In addition to the listed elements/components/etc., there may be additional elements/components/etc. The terms "first" and "second" are only used as markers and are not limited to the number of objects.

At present, different types of pantographs are usually installed on the roof of electric locomotives so that the contact pressure between the pantograph and the catenary meets the current requirements of the pantograph. However, there are many different types of pantograph poles. The earth occupies the roof space of the electric locomotive, which makes the roof equipment layout complicated and high failure rate. In addition, because different types of pantographs cannot replace each other, if a pantograph fails, the electric locomotive cannot continue to run. . In response to the above problems, the present disclosure provides a pantograph control method, pantograph and electric locomotive.

The embodiments of the present disclosure first provide a pantograph control method. As shown in FIG. 1, the pantograph control method may include the following steps:

Step S110: Raise the pantograph so that the pantograph is in contact with the catenary and receives current, and the contact pressure between the pantograph and the catenary is the first pressure;

Step S120, detecting the current system of the contact net;

In step S130, the valve plate of the pantograph is controlled according to the detected current system to adjust the flow rate of the compressed gas for lifting the bow to adjust the contact pressure between the pantograph and the catenary.

In the pantograph control method of the embodiment of the present disclosure, firstly, the pantograph is raised so that the pantograph is in contact with the catenary and receives current; secondly, the current system (AC or DC) of the catenary is detected; and finally, According to the current system, the valve plate of the pantograph is controlled to adjust the air flow of the compressed gas for lifting the bow to adjust the contact pressure between the pantograph and the catenary. Because different current systems have different requirements for the contact pressure between the pantograph and the catenary, and this pantograph control method enables the pantograph to automatically adjust the pantograph and the catenary according to the current system of the catenary. The contact pressure of the pantograph enables the pantograph to receive current under a variety of current systems.

The following describes in detail the pantograph control method provided by the embodiments of the present disclosure with reference to the accompanying drawings:

In step S110, the pantograph is raised so that the pantograph is in contact with the catenary and receives current, and the contact pressure between the pantograph and the catenary is the first pressure.

The pantograph on the roof of the electric locomotive can contact the catenary and receive current after being raised, because different current systems (AC mode and DC mode) have different requirements for the contact pressure between the pantograph and the catenary. Specifically, the contact pressure in the AC mode is less than the contact pressure in the DC mode. At this time, the current system of the catenary can be assumed to be AC mode, and the contact pressure (first pressure) between the pantograph and the catenary is equal to The corresponding contact pressure in the AC mode can reduce the number of pantograph adjustments and improve work efficiency.

Step S120, detecting the current system of the contact net.

After the pantograph is in contact with the catenary and receiving current, the current system detector can be used to detect the current system (AC mode and DC mode) of the catenary. For example, the current system detection can be a multimeter or an oscilloscope. It can be a high-voltage detection device for electric locomotives, and there is no special restriction here.

In step S130, the pantograph is controlled to raise or lower according to the detected current mode to adjust the contact pressure between the pantograph and the catenary.

Specifically, when the detected current system is the AC mode, the flow rate of the compressed gas passing through the valve plate is kept constant to keep the contact pressure (first pressure) between the pantograph and the catenary unchanged; When the current system of the catenary is in the direct current mode, the control valve plate increases the flow rate of the compressed gas for bow lifting to increase the contact pressure between the pantograph and the catenary until it reaches the second pressure. It is obvious that The second pressure is greater than the first pressure, and the specific values of the first pressure and the second pressure shall meet the actual use requirements, which will not be described in detail here.

After step S130, the pantograph control method of the embodiment of the present disclosure may further include:

Step S140, confirm that the current system of the contact net matches the first pressure/second pressure, specifically, compare the detection signal of the current system detector with the corresponding contact pressure (first pressure/first pressure) That is to say, the current system is compared with the first pressure/second pressure. When the current system matches the first pressure/second pressure, the authority can be opened to the operator so that the operator can start the electric locomotive.

The embodiments of the present disclosure also provide a pantograph. As shown in FIG. 2, the pantograph may include a bow head 1, a bow lifting assembly 2, a current system detector and a controller, wherein:

The sliding plate 10 on the bow head 1 can be in contact with the catenary and receive flow; the bow lifting assembly 2 connected with the bow head 1 has a valve plate 220 that can adjust the flow of compressed gas for bow lifting to increase or Lower the bow head 1; after the current system detector determines the current system (AC or DC) of the catenary, the controller can control the valve plate 220 according to the current system to adjust the air flow of the compressed gas for bow lifting to adjust the sliding plate 10 and the contact The contact pressure between the nets, that is, the pantograph can adjust the contact pressure between the sliding plate 10 and the catenary according to the current system of the catenary, so that the pantograph can receive current under a variety of current systems.

The following describes in detail the components of the pantograph provided by the embodiments of the present disclosure with reference to the accompanying drawings:

As shown in Fig. 2, the bow head 1 may have a sliding plate 10, which is used to contact the contact net and receive flow. For example, the number of skateboards 10 can be four, while the number of skateboards 10 in the related art is only two. Therefore, under the condition that the contact pressure between the skateboard 10 and the contact net remains unchanged, the number of skateboards 10 The contact area between the bow head 1 and the catenary is doubled, so that the pantograph of the present disclosure can acquire and transmit a larger current in the direct current mode.

Of course, the bow head 1 can also include brackets, tension springs, bow head end shafts, and rotating shafts. As shown in Figure 2, the number of brackets is four. The bracket is mounted on the bow end shaft through a tension spring, and the bow head end shaft is connected to the rotating shaft, so that the sliding plate 10 can follow the direction of the contact net to adjust the rotation angle, and the tension generated by the tension spring Ensure that the sliding plate 10 is in reliable contact with the contact net.

As shown in FIG. 2, the bow raising assembly 2 can be connected with the bow head 1 and used to raise or lower the bow head 1. The bow raising assembly 2 may include a base frame 20, a hinge structure 21, a driving member 22, a current system detector and a controller, wherein:

The underframe 20 can be fixed on the roof of the electric locomotive to provide a mounting base for the hinge structure 21 and the driving part 22. The bottom frame 20 may be a frame structure formed by splicing side beams. Of course, the bottom frame 20 may also be integrally formed, and there is no special limitation here.

It should be noted that the side of the bottom frame 20 may be provided with a guide copper bar 200. Since the pantograph of the present disclosure can contact and receive currents with different standards of contact nets, the pantograph needs to be welded with multiple However, because electric locomotives require a large operating current in DC mode, in order to avoid the excessive heating of the busbar due to the excessive operating current, a diversion copper can be installed on the side of the underframe 20 In this way, not only can the transmission of large currents be satisfied, but also holes can be opened at any position of the guide copper bar 200 to facilitate the arrangement of cables. In addition, conductive spraying agent can also be used to protect the connection between the base frame 20 and the guide copper bar 200, so as to avoid corrosion of the connection and reduce the temperature rise of the connection.

The hinge structure 21 may include an upper arm 211 and a lower arm 212, wherein the upper arm 211 is connected to the bow head 1, and the lower arm 212 is connected to the base frame 20, and the upper arm 211 and the lower arm 212 are rotatably connected, and the upper arm 211 and the lower arm 212 rotate When, you can raise or lower the bow head 1.

Because the current needs to be transmitted from the bow head 1 to the base frame 20 through the hinge structure 21, the upper arm 211 and the lower arm 212 of the hinge structure 21 are connected to each other through a rotating shaft, and the contact state is not stable. In order to avoid the large current passing through the rotating shaft If the temperature rises too high due to poor contact, a copper stranded wire 23 can be set between the upper arm 211 and the lower arm 212, and the current will avoid the shaft and pass from the copper stranded wire 23. The specification and quantity of the copper stranded wire 23 are here No special restrictions.

The driving member 22 may be provided on the base frame 20 for driving the upper arm 211 and the lower arm 212 to rotate to control the bow head 1 to raise or lower. For example, the driving member 22 may include a valve plate 220, a bow raising device 221, and a gas pipe 222 connecting the valve plate 220 and the bow raising device 221. The compressed gas generated by the air source system of the electric locomotive passes through the valve plate 220 and the gas pipe 222. Entering the gas path in the bow lifting device 221, the compressed gas in the gas path can drive the guide disc of the bow lifting device 221 to move, and the guide disc pulls the wire rope, so that the wire rope wound on the guide disc drives the lower arm 212 to rotate, and then drives it The upper arm 211 rotates, and finally the bow head 1 is raised or lowered.

Specifically, the valve plate 220 may include a reversing valve, a first pressure regulating valve, a second pressure regulating valve and a pressure switch, where:

The reversing valve can be in communication with the first pressure regulating valve or the second pressure regulating valve. The compressed gas generated by the air source system of the electric locomotive can enter the air path in the bow raising device 221 through the reversing valve and the first pressure regulating valve. The first pressure regulating valve can adjust the air pressure in the gas path to the contact pressure (first pressure) in the AC mode; similarly, the compressed gas generated by the air source system of the electric locomotive can be adjusted through the reversing valve and the second regulating valve. The pressure valve enters the air path in the bow raising device 221. At this time, the second pressure regulating valve can adjust the air pressure in the air path to the contact pressure (second pressure) in the direct current mode.

Therefore, the working process of the pantograph of the present disclosure is as follows: when the pantograph is raised for the first time, the reversing valve is connected to the first pressure regulating valve, and compressed gas is supplied to the gas circuit of the pantograph through the first pressure regulating valve. The wind causes the sliding plate 10 to rise and contact with the catenary to receive current; subsequently, the current system detector is used to detect the current system of the catenary. The current system detector has been described in detail above, and will not be repeated here; If the current system of the catenary is in the AC mode, the flow rate of the compressed gas passing through the valve plate 220 is kept unchanged, that is, the compressed gas is maintained to supply air to the air path in the bow raising device 221 through the first pressure regulating valve, and then the sliding plate is maintained The contact pressure (first pressure) between 10 and the catenary remains unchanged; if the current system of the catenary is DC mode, the control valve plate 220 will increase the flow of compressed gas, that is, the reversing valve is switched and adjusted with the second The pressure valve is in communication, so that the compressed gas is supplied to the air path in the bow raising device 221 through the second pressure regulating valve, and the contact pressure between the sliding plate 10 and the catenary is the second pressure.

The controller of the embodiment of the present disclosure is connected to the current system detector described above. After the current system detector detects the current system of the catenary and feeds the result back to the controller, the controller can control according to the current system of the catenary The bow head 1 is raised or lowered to adjust the contact pressure between the sliding plate 10 and the contact net. For example, the controller can be a single-chip microcomputer installed on the bow-lifting assembly, of course, it can also be the central processing unit of the locomotive, and there is no special limitation here.

The pressure switch in the valve plate 220 is a gas path switching indicator switch. When compressed gas is supplied to the gas path in the bow raising device 221 through the first pressure regulating valve, the level signal output by the pressure switch is a low level signal. When the compressed gas is supplied to the air path in the bow raising device 221 through the second pressure regulating valve, the level signal output by the pressure switch is a high level signal.

At this time, the aforementioned controller can also receive the level signal, and compare the level signal (low-level signal/high-level signal) with the current system of the catenary (AC mode/DC mode) to Confirm that the contact pressure (first pressure/second pressure) corresponding to the level signal matches the current system (AC mode/DC mode) of the catenary, that is, when the level signal matches the current system, you can Operators have open permissions so that they can start electric locomotives.

Of course, the valve plate 220 may also include a first pressure gauge and a second pressure gauge. The first pressure gauge is used to display the pressure value of the compressed gas in the air circuit in the AC mode, and the second pressure gauge is used to display the air circuit in the AC mode. The pressure value of the compressed gas in the AC mode to facilitate the operator to measure the contact pressure. It should be noted that the valve plate 220 of the embodiment of the present disclosure may also include a safety valve. When the valve plate 220 fails and the pressure exceeds the set value of the safety valve, the safety valve will act to prevent excessive pressure in the gas path from damaging the bow.装置 221.

The embodiments of the present disclosure also provide an electric locomotive, which includes the pantograph described in any one of the above, which will not be described in detail here.

It should be understood that the present disclosure does not limit its application to the detailed structure and arrangement of components proposed in this specification. The present disclosure can have other embodiments, and can be implemented and executed in various ways. The aforementioned deformations and modifications fall within the scope of the present disclosure. It should be understood that the present disclosure disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or obvious in the text and/or drawings. All these different combinations constitute multiple sets of alternative aspects of the present disclosure. The embodiments described in this specification illustrate the best way known for implementing the present disclosure, and will enable those skilled in the art to utilize the present disclosure.

Claims

A pantograph control method, which includes:

Raise the pantograph so that the pantograph is in contact with the catenary and receives current, and the contact pressure between the pantograph and the catenary is the first pressure;

Detecting the current system of the contact net;

The valve plate of the pantograph is controlled according to the detected current system to adjust the flow rate of the compressed gas for lifting the bow to adjust the contact pressure between the pantograph and the catenary.
The pantograph control method according to claim 1, wherein, before the detecting the current system of the catenary, it is assumed that the current system is an AC mode.
The pantograph control method according to claim 2, wherein the valve plate of the pantograph is controlled according to the detected current system to adjust the flow rate of the compressed gas for lifting the bow to adjust the pantograph and The contact pressure between the contact nets includes:

When the detected current system is the AC mode, the flow rate of the compressed gas passing through the valve plate is kept unchanged, so as to keep the contact pressure between the pantograph and the catenary as the first pressure;

When the detected current mode is the direct current mode, control the valve plate to increase the flow rate of the compressed gas for bow lifting, and make the contact pressure between the pantograph and the catenary a second pressure ；

Wherein, the second pressure is greater than the first pressure.
The pantograph control method according to claim 3, wherein the valve plate of the pantograph that controls the pantograph according to the detected current system adjusts the flow rate of the compressed gas for bow lifting to adjust the After the contact pressure between the pantograph and the catenary, the method for controlling the pantograph further includes:

Confirm that the current system matches the first pressure/the second pressure.
A pantograph, which includes:

The bow head has a sliding plate that can contact the contact net and receive flow;

A bow-lifting component connected to the bow head, the bow-lifting component has a valve plate, and the valve plate can adjust the flow rate of the compressed gas for bow-lifting to raise or lower the bow head;

A current system detector for detecting the current system of the contact net;

The controller is connected to the current system detector, and is used for controlling the valve plate to adjust the flow rate of the compressed gas for bow lifting according to the current system, so as to adjust the contact pressure between the sliding plate and the contact net.
The pantograph according to claim 5, wherein the number of the sliding plates is four.
The pantograph according to claim 5, wherein the bow raising assembly comprises:

Chassis

The hinge structure includes an upper arm and a lower arm rotatably connected with the upper arm, the upper arm is connected to the bow head, and the lower arm is connected to the chassis;

The driving member is arranged on the base frame and is used to drive the upper arm and the lower arm to rotate to control the bow head to rise or lower.
The pantograph according to claim 7, wherein the side part of the base frame is provided with a flow guiding copper bar.
The pantograph according to claim 7, wherein a copper strand is connected between the upper arm and the lower arm.
An electric locomotive comprising the pantograph according to any one of claims 5-9.