CN210529384U - Three-rail synchronous track lifting control system of railway turnout tamping car - Google Patents
Three-rail synchronous track lifting control system of railway turnout tamping car Download PDFInfo
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- CN210529384U CN210529384U CN201921362587.5U CN201921362587U CN210529384U CN 210529384 U CN210529384 U CN 210529384U CN 201921362587 U CN201921362587 U CN 201921362587U CN 210529384 U CN210529384 U CN 210529384U
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Abstract
The application discloses railway switch tamping car three-rail synchronous track lifting control system compares with prior art, includes: a main track lifting hydraulic system and an auxiliary track lifting hydraulic system; the main track lifting hydraulic system is used for controlling the main track lifting device to move up and down; the auxiliary track lifting hydraulic system is used for controlling the auxiliary track lifting device to move up and down; the main track lifting control circuit is connected with the main track lifting hydraulic system through an electric signal; the auxiliary track lifting control circuit is connected with the auxiliary track lifting hydraulic system through an electric signal; and the level detection sensor is used for measuring the level difference between the turnout straight strand where the main turnout taking device is located and the turnout curved strand where the auxiliary turnout taking device is located in real time. The application provides a synchronous track lifting control system of railway switch tamping car three rails compares in prior art, can solve switch tamping car third share track lifting volume and be difficult to keep the problem of level, the supplementary track lifting of needs manual work with main track lifting, reduces manual work load, is showing the quality that improves track lifting operation in the switch district.
Description
Technical Field
The application relates to the technical field of track construction, more specifically say, especially relate to a three-rail synchronous track lifting control system of railway switch tamping car.
Background
The railway turnout tamping wagon is a large-scale special maintenance device used for lifting, shifting, leveling and tamping railway turnouts. The railway turnout tamping car comprises a car body, a main track lifting device, a main track lifting oil cylinder, an auxiliary track lifting device, an auxiliary track lifting oil cylinder, an auxiliary track lifting arm and the like.
An important function of the railway turnout tamping car is to synchronously lift two straight strands and curved strands on the side of the railway turnout when the railway turnout tamping car works in a turnout area. At present, three-rail track lifting can be realized by a main track lifting device and an extended auxiliary track lifting device in the prior art, but the technology cannot realize real synchronization and needs manual auxiliary track lifting and observation.
Therefore, how to provide a three-rail synchronous track lifting control system of railway turnout tamping car, it can solve the problem that the track lifting amount of the third share of the turnout tamping car is difficult to keep level with the main track lifting, needs manual auxiliary track lifting, reduces the workload of manual work, improves the quality of track lifting operation in the turnout area, and has become the technical problem that the technical personnel in the field need to solve urgently.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the application provides a three-rail synchronous track lifting control system of railway turnout tamping car, which can solve the problem that the third track lifting amount of the turnout tamping car is difficult to keep horizontal with a main track lifting, and needs manual auxiliary track lifting, reduces the workload of manual operation, and improves the quality of track lifting operation in a turnout area.
The technical scheme provided by the application is as follows:
the application provides a three-rail synchronous track lifting control system of railway switch tamping car, includes: a main track lifting hydraulic system and an auxiliary track lifting hydraulic system; the main track lifting hydraulic system is used for controlling the main track lifting device to move up and down; the auxiliary track lifting hydraulic system is used for controlling the auxiliary track lifting device to move up and down;
the main track lifting control circuit is connected with the main track lifting hydraulic system through an electric signal;
the auxiliary track lifting control circuit is connected with the auxiliary track lifting hydraulic system through an electric signal;
and the level detection sensor is used for measuring the level difference between the turnout straight strand where the main turnout taking device is located and the turnout curved strand where the auxiliary turnout taking device is located in real time.
Further, in a preferred mode of the present invention, the main-starting-track hydraulic system includes: the main track lifting servo valve is connected with the main track lifting control circuit through signals; the main track lifting oil cylinder is connected with the main track lifting servo valve through an oil way; the main track lifting oil tank is connected with the main track lifting servo valve through an oil way; and the main track lifting pump is arranged on an oil way which is connected with the main track lifting oil tank and the main track lifting servo valve.
Further, in a preferred mode of the present invention, the auxiliary track lifting hydraulic system includes: the auxiliary track lifting servo valve is connected with the auxiliary track lifting control circuit through signals; the auxiliary track lifting oil cylinder is connected with the auxiliary track lifting servo valve through an oil way; the auxiliary track lifting oil tank is connected with the auxiliary track lifting servo valve through an oil way; and the auxiliary track lifting pump is arranged on an oil way which is connected with the auxiliary track lifting oil tank and the auxiliary track lifting servo valve.
Further, in a preferred mode of the present invention, the level detection sensor is specifically connected to the auxiliary track lifting control circuit.
Further, in a preferred embodiment of the present invention, the horizontal detection sensor is an infrared CCD image sensor.
Further, in a preferred mode of the present invention, the three-rail synchronous track lifting control system of the railway switch tamping vehicle further comprises: the main track lifting safety valve is connected with the main track lifting oil cylinder; and the auxiliary track lifting safety valve is connected with the auxiliary track lifting oil cylinder.
Further, in a preferred mode of the present invention, the three-rail synchronous track lifting control system of the railway switch tamping vehicle further comprises: the main track lifting throttle valve is connected with the main track lifting oil cylinder and the main track lifting servo valve; and the auxiliary track lifting throttle valve is connected with the auxiliary track lifting oil cylinder and the auxiliary track lifting servo valve.
Further, in a preferred mode of the present invention, the main starting oil pump and the oil pump inlet end of the auxiliary starting oil pump are both provided with an oil filter.
Further, in a preferred mode of the present invention, the three-rail synchronous track lifting control system of the railway switch tamping vehicle further comprises: and the main track lifting oil pressure sensor is arranged on an oil circuit between the main track lifting servo valve and the main track lifting oil cylinder.
Further, in a preferred mode of the present invention, the three-rail synchronous track lifting control system of the railway switch tamping vehicle further comprises: and the auxiliary track lifting oil pressure sensor is arranged on an oil path between the auxiliary track lifting servo valve and the auxiliary track lifting oil cylinder.
Further, in a preferred mode of the present invention, the three-rail synchronous track lifting control system of the railway switch tamping vehicle further comprises: the main track lifting alarm prompter is connected with the main track lifting oil pressure sensor and the main track lifting control circuit; and the auxiliary track lifting alarm prompter is connected with the auxiliary track lifting oil pressure sensor and the auxiliary track lifting control circuit.
The utility model provides a pair of three rail synchronous track lifting control system of railway switch tamping car compares with prior art, include: the system comprises a main track lifting hydraulic system and an auxiliary track lifting hydraulic system, wherein the main track lifting hydraulic system is used for controlling a main track lifting device to move up and down, the auxiliary track lifting hydraulic system is used for controlling an auxiliary track lifting device to move up and down, a main track lifting control circuit is connected with the main track lifting hydraulic system through an electric signal, and an auxiliary track lifting control circuit is connected with the auxiliary track lifting hydraulic system through an electric signal; and the device comprises a horizontal detection sensor for measuring the horizontal difference between the straight strand where the main track lifting device is located and the curved strand where the auxiliary track lifting device is located in real time. So, the horizontal error signal that level measurement sensor detected between obtaining straight strand and bent strand gets into supplementary track lifting control circuit, and supplementary track lifting servo valve current is controlled, and then the supplementary track lifting hydro-cylinder track lifting of control, and the horizontal error signal of straight strand and bent strand is zero until, and supplementary track lifting servo valve current is zero, and supplementary track lifting hydro-cylinder track lifting stops. Thereby guaranteed promptly that supplementary track jack cylinder has enough big lifting power, can guarantee the synchronous track jack of the bent thigh of supplementary track jack and the straight thigh of main track jack again, eliminate the horizontal error between the two, compare in prior art, can solve switch tamping car third thigh track jack volume and be difficult to keep the level with main track jack, need the problem of artifical supplementary track jack, reduce manual work load, show the quality that improves track jack operation in the trouble district.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a three-rail synchronous track lifting control system of a railway turnout tamping vehicle provided by an embodiment of the utility model;
fig. 2 is a schematic diagram of a three-rail synchronous track lifting control system of a railway turnout tamping vehicle in the prior art.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "first," "second," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of a plurality of or a plurality of is two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, do not have the technical essence, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.
As shown in fig. 1 to fig. 2, the three-rail synchronous track lifting control system of the railroad switch tamping vehicle provided in the embodiment of the present application includes: a main track lifting hydraulic system and an auxiliary track lifting hydraulic system; the main track lifting hydraulic system is used for controlling the main track lifting device to move up and down; the auxiliary track lifting hydraulic system is used for controlling the auxiliary track lifting device to move up and down; the main track lifting control circuit 1 is connected with the main track lifting hydraulic system through an electric signal; the auxiliary track lifting control circuit 4 is connected with the auxiliary track lifting hydraulic system through an electric signal; and the level detection sensor 7 is used for measuring the level difference between the main track lifting device and the auxiliary track lifting device in real time.
The embodiment of the utility model provides a three-rail synchronous track lifting control system of railway switch tamping car specifically includes: the system comprises a main track lifting hydraulic system and an auxiliary track lifting hydraulic system, wherein the main track lifting hydraulic system is used for controlling a main track lifting device to move up and down, the auxiliary track lifting hydraulic system is used for controlling an auxiliary track lifting device to move up and down, a main track lifting control circuit 1 is connected with the main track lifting hydraulic system through an electric signal, and an auxiliary track lifting control circuit 4 is connected with the auxiliary track lifting hydraulic system through an electric signal; and the device comprises a horizontal detection sensor 7 for measuring the horizontal difference of the turnout bent strand between the turnout straight strand where the main turnout device is located and the auxiliary turnout device in real time. So, horizontal error signal that level measurement sensor detection obtained between straight thigh and the bent thigh gets into supplementary track lifting control circuit 4, and the supplementary 5 electric currents of track lifting servo valve of control, and then the supplementary 6 track lifting of track lifting hydro-cylinder of control, until the horizontal error signal between bent thigh and the straight thigh is zero, supplementary 5 electric currents of track lifting servo valve are zero, supplementary track lifting hydro-cylinder 6 track lifting stops. Thereby guaranteed promptly that supplementary track jack cylinder 6 has enough big lifting power, can guarantee the synchronous track jack of the bent thigh of supplementary track jack and the straight thigh of main track jack again, eliminate the horizontal error between straight thigh and bent thigh, compare in prior art, can solve switch tamping car third thigh track jack volume and be difficult to keep the level with the main track jack, need the problem of artifical supplementary track jack, reduce manual work load, show the quality that improves track jack operation in the trouble district.
Specifically, in the embodiment of the present invention, the main track lifting hydraulic system includes: a main track lifting servo valve 2 connected with the main track lifting control circuit 1 through signals; the main track lifting oil cylinder 3 is connected with the main track lifting servo valve 2 through an oil way; the main track lifting oil tank is connected with the main track lifting servo valve 2 through an oil way; and the main track lifting pump is arranged on an oil circuit connected with the main track lifting oil tank and the main track lifting servo valve 2.
Specifically, in the embodiment of the present invention, the auxiliary track lifting hydraulic system includes: the auxiliary track lifting servo valve 5 is connected with the auxiliary track lifting control circuit 4 through signals; the auxiliary track lifting oil cylinder 6 is connected with the auxiliary track lifting servo valve 5 through an oil way; the auxiliary track lifting oil tank is connected with the auxiliary track lifting servo valve 5 through an oil way; and the auxiliary track lifting pump is arranged on an oil way which is connected with the auxiliary track lifting oil tank and the auxiliary track lifting servo valve 5.
Specifically, in the embodiment of the present invention, the level detection sensor 7 is specifically connected to the auxiliary track lifting control circuit 4.
Specifically, in the embodiment of the present invention, the horizontal detection sensor 7 is an infrared CCD image sensor.
Specifically, in the embodiment of the utility model provides an in, the synchronous track lifting control system of three rails of railway switch tamping car still includes: a main lift safety valve connected to the main lift cylinder 3; and the auxiliary track lifting safety valve is connected with the auxiliary track lifting oil cylinder 6.
Specifically, in the embodiment of the utility model provides an in, the synchronous track lifting control system of three rails of railway switch tamping car still includes: the main track lifting throttle valve is connected with the main track lifting oil cylinder 3 and the main track lifting servo valve 2; and the auxiliary track lifting throttle valve is connected with the auxiliary track lifting oil cylinder 6 and the auxiliary track lifting servo valve 5.
Specifically, in the embodiment of the utility model provides an in, main oil pump of starting a way with the oil pump entrance point of supplementary oil pump of starting a way all is provided with fluid filter.
Specifically, in the embodiment of the utility model provides an in, the synchronous track lifting control system of three rails of railway switch tamping car still includes: and the main track lifting oil pressure sensor is arranged on an oil path between the main track lifting servo valve 2 and the main track lifting oil cylinder 3.
Specifically, in the embodiment of the utility model provides an in, the synchronous track lifting control system of three rails of railway switch tamping car still includes: and the auxiliary track lifting oil pressure sensor is arranged on an oil path between the auxiliary track lifting servo valve 5 and the auxiliary track lifting oil cylinder 6.
Specifically, in the embodiment of the utility model provides an in, the synchronous track lifting control system of three rails of railway switch tamping car still includes: a main track lifting alarm prompter connected with the main track lifting oil pressure sensor and the main track lifting control circuit 1; and the auxiliary track lifting alarm prompter is connected with the auxiliary track lifting oil pressure sensor and the auxiliary track lifting control circuit 4.
More specifically, at present, a track lifting servo valve controls a main track lifting cylinder and an auxiliary track lifting cylinder simultaneously, a track lifting force of an auxiliary track lifting device is applied through an extended auxiliary track lifting arm, the auxiliary track lifting cylinder generating the auxiliary track lifting arm is arranged on a vehicle body, the track lifting amount of the auxiliary track lifting device is actually far smaller than the track lifting amount of the main track lifting device due to a lever principle, a track lifting control circuit detects the track lifting amount of the main track lifting device, as long as the track lifting amount of the main track lifting device reaches a target value, the current output by the track lifting control circuit to the track lifting servo valve is changed into 0, the track lifting servo valve stops supplying oil to the main track lifting cylinder and the auxiliary track lifting cylinder, the track lifting is stopped, and therefore the track lifting amount of a third rail (a bent strand) often cannot meet the requirement, and manual auxiliary track lifting is needed.
And the track lifting control circuit only accurately controls the track lifting amount of the main track lifting device, and the third rail (curved strand) is not detected by a sensor after the track lifting operation is finished and is level with the straight strand where the turnout tamping car is located, so that the track lifting control circuit is not controlled and can only realize track lifting and observation through manual assistance.
In order to ensure the quality of the tamping car in the turnout area and reduce the workload of manual auxiliary track lifting, the embodiment of the utility model provides a control system for three-rail synchronous track lifting of a turnout tamping car, wherein an auxiliary track lifting oil cylinder and a main track lifting oil cylinder are involved, and the oil paths of the auxiliary track lifting oil cylinder and the main track lifting oil cylinder are separated; an auxiliary track lifting servo valve for controlling the auxiliary track lifting oil cylinder; an auxiliary track lifting control circuit; and a measuring sensor for measuring the horizontal error between the curved strand where the auxiliary track lifting device is located and the straight strand where the main track lifting device is located is additionally arranged on the auxiliary track lifting device.
In the embodiment of the utility model, two sets of closed loop track lifting control circuits are adopted to respectively control the main track lifting oil cylinder and the auxiliary track lifting oil cylinder, the main track lifting control circuit is kept unchanged, and one set of auxiliary track lifting control circuit and an auxiliary track lifting servo valve are added to control the auxiliary track lifting oil cylinder; and a horizontal detection sensor is arranged on the auxiliary track lifting device to measure the horizontal difference between the straight strand and the curved strand in real time.
When the turnout tamping car carries out three-rail track lifting in a turnout area, the main track lifting oil cylinder and the auxiliary track lifting oil cylinder independently act, a given basic track lifting amount and a track lifting error detected by the leveling sensor form a track lifting amount signal to enter a main track lifting control circuit, the current of a main track lifting servo valve is controlled, and then the main track lifting oil cylinder is controlled to lift the track panel to a given position. The horizontal error signal between the straight strand where the main track lifting device is located and the curved strand where the auxiliary track lifting device is located is detected by the horizontal measuring sensor and enters the auxiliary track lifting control circuit to control the current of the auxiliary track lifting servo valve so as to control the track lifting of the auxiliary track lifting oil cylinder until the horizontal error signal between the auxiliary track lifting device and the main track lifting device is zero, the current of the auxiliary track lifting servo valve is zero, and the track lifting of the auxiliary track lifting oil cylinder is stopped. The auxiliary track lifting oil cylinder acts along with the main track lifting oil cylinder, and the control and oil circuit are independent, so that the auxiliary track lifting oil cylinder is ensured to have enough lifting force, the synchronous track lifting of the curved strand of the auxiliary track lifting and the straight strand of the main track lifting can be ensured, and the horizontal error between the curved strand of the auxiliary track lifting and the straight strand of the main track lifting is eliminated.
From above, the embodiment of the utility model provides a railway switch tamping car three-rail synchronous track lifting control system who relates to compares in prior art, can solve switch tamping car third share track lifting volume and be difficult to keep the level with main track lifting, needs the problem of artifical supplementary track lifting, reduces manual work load, is showing the quality that improves track lifting operation in the switch district.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. The utility model provides a railway switch tamping car three-rail synchronous track lifting control system which characterized in that includes:
a main track lifting hydraulic system and an auxiliary track lifting hydraulic system; the main track lifting hydraulic system is used for controlling the main track lifting device to move up and down; the auxiliary track lifting hydraulic system is used for controlling the auxiliary track lifting device to move up and down;
the main track lifting control circuit (1) is connected with the main track lifting hydraulic system through an electric signal;
the auxiliary track lifting control circuit (4) is connected with the auxiliary track lifting hydraulic system through an electric signal;
and the horizontal detection sensor (7) is used for measuring the horizontal difference between the turnout straight strand where the main turnout device is located and the turnout curved strand where the auxiliary turnout device is located in real time.
2. The three-rail synchronous lifting control system of the railway switch tamping vehicle as claimed in claim 1, wherein the main lifting hydraulic system comprises: the main track lifting servo valve (2) is connected with the main track lifting control circuit (1) through signals; the main track lifting oil cylinder (3) is connected with the main track lifting servo valve (2) through an oil way; the main track lifting oil tank is connected with the main track lifting servo valve (2) through an oil way; and the main track lifting pump is arranged on an oil way connected with the main track lifting oil tank and the main track lifting servo valve (2).
3. The three-rail synchronous lifting control system of the railway turnout tamping vehicle of claim 2, wherein the auxiliary lifting hydraulic system comprises: the auxiliary track lifting servo valve (5) is connected with the auxiliary track lifting control circuit (4) through signals; the auxiliary track lifting oil cylinder (6) is connected with the auxiliary track lifting servo valve (5) through an oil way; the auxiliary track lifting oil tank is connected with the auxiliary track lifting servo valve (5) through an oil way; and the auxiliary track lifting pump is arranged on an oil way which is connected with the auxiliary track lifting oil tank and the auxiliary track lifting servo valve (5).
4. The three-rail synchronous track lifting control system of the railway turnout tamping vehicle as claimed in claim 3, wherein the level detection sensor (7) is specifically connected with the auxiliary track lifting control circuit (4).
5. The three-rail synchronous lifting control system for the railway switch tamping vehicle as claimed in claim 4, wherein the three-rail synchronous lifting control system further comprises: the main track lifting safety valve is connected with the main track lifting oil cylinder (3); and the auxiliary track lifting safety valve is connected with the auxiliary track lifting oil cylinder (6).
6. The three-rail synchronous lifting control system for the railway switch tamping vehicle as claimed in claim 5, wherein the three-rail synchronous lifting control system further comprises: the main track lifting throttle valve is connected with the main track lifting oil cylinder (3) and the main track lifting servo valve (2); and the auxiliary track lifting throttle valve is connected with the auxiliary track lifting oil cylinder (6) and the auxiliary track lifting servo valve (5).
7. The three-rail synchronous track lifting control system of the railway turnout tamping vehicle of claim 4, wherein oil filters are arranged at the inlet ends of the main track lifting oil pump and the auxiliary track lifting oil pump.
8. The three-rail synchronous lifting control system for the railway switch tamping vehicle as claimed in claim 7, wherein the three-rail synchronous lifting control system further comprises: and the main track lifting oil pressure sensor is arranged on an oil circuit between the main track lifting servo valve (2) and the main track lifting oil cylinder (3).
9. The three-rail synchronous lifting control system for the railway switch tamping vehicle as claimed in claim 8, wherein the three-rail synchronous lifting control system further comprises: and the auxiliary track lifting oil pressure sensor is arranged on an oil path between the auxiliary track lifting servo valve (5) and the auxiliary track lifting oil cylinder (6).
10. The system for controlling the three-rail synchronous lifting of the railway switch tamping vehicle as claimed in any one of claims 4 to 9, wherein the system for controlling the three-rail synchronous lifting of the railway switch tamping vehicle further comprises: the main track lifting alarm prompter is connected with the main track lifting oil pressure sensor and the main track lifting control circuit (1); and the auxiliary track lifting alarm prompter is connected with the auxiliary track lifting oil pressure sensor and the auxiliary track lifting control circuit (4).
11. The three-rail synchronous track lifting control system of the railway turnout tamping vehicle according to claim 3 or 4, wherein the horizontal detection sensor (7) is an infrared CCD image sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921362587.5U CN210529384U (en) | 2019-08-21 | 2019-08-21 | Three-rail synchronous track lifting control system of railway turnout tamping car |
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| CN201921362587.5U CN210529384U (en) | 2019-08-21 | 2019-08-21 | Three-rail synchronous track lifting control system of railway turnout tamping car |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453547A (en) * | 2019-08-21 | 2019-11-15 | 长沙瀚鹏电子技术有限公司 | A kind of three rail of railway switch tamping car synchronization track lifting control system |
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2019
- 2019-08-21 CN CN201921362587.5U patent/CN210529384U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453547A (en) * | 2019-08-21 | 2019-11-15 | 长沙瀚鹏电子技术有限公司 | A kind of three rail of railway switch tamping car synchronization track lifting control system |
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