CN210856813U - Combined two-purpose rail laying machine set - Google Patents
Combined two-purpose rail laying machine set Download PDFInfo
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- CN210856813U CN210856813U CN201921551399.7U CN201921551399U CN210856813U CN 210856813 U CN210856813 U CN 210856813U CN 201921551399 U CN201921551399 U CN 201921551399U CN 210856813 U CN210856813 U CN 210856813U
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Abstract
A combined dual-purpose steel rail laying unit relates to the field of rail laying equipment. The combined dual-purpose steel rail laying unit comprises a steel rail dragging vehicle, a host machine, a sleeper transporting gantry crane, a traction power vehicle, a dual-purpose steel rail pushing vehicle and at least one dual-purpose sleeper transporting vehicle which are sequentially connected; the dual-purpose steel rail pushing vehicle comprises a pushing vehicle body, a steel rail bracket and two steel rail dragging and pushing assemblies, wherein the steel rail bracket comprises two steel rail underframe frames and a fixed frame which are arranged in parallel, and two ends of the fixed frame are respectively connected with the pushing vehicle body and the two steel rail underframe frames; the two steel rail dragging and pushing assemblies can be switched between parallel arrangement and splayed arrangement and are used for dragging and pushing the steel rails to move along a linear direction; the dual-purpose sleeper transport vehicle comprises a railway flat car and a sleeper frame arranged on the railway flat car. The application provides a dual-purpose rail of combination formula paves rail unit can have tiny fragments of stone, coal, etc. to pave the rail operation and the ballastless rail operation and carry out state transition between the two by high efficiency.
Description
Technical Field
The application relates to the technical field of rail laying equipment, in particular to a combined type dual-purpose steel rail laying unit.
Background
With the rapid development of railway construction in China, railway track laying construction conditions become more complex, a single railway line is not limited to only having ballast tracks or ballastless tracks, the situation that the ballast tracks and the ballastless tracks alternately appear in the single railway line can occur according to different geological conditions, and new requirements are provided for track laying construction equipment.
In the existing track laying construction equipment, part of ballast long steel rail track laying units can be used for laying ballastless tracks at the same time, but the construction efficiency is low, and the ballast long steel rail track laying units can only be used for short-distance local construction; and the ballastless track laying unit cannot be used for ballasted track sleeper laying construction.
Therefore, an efficient and fast device for switching between two working conditions of ballast track construction and ballastless track steel rail laying is needed.
SUMMERY OF THE UTILITY MODEL
An object of this application is to provide a modular dual-purpose rail shop rail unit, it can realize having two kinds of construction methods of tiny fragments of stone, coal, etc. rail shop construction and ballastless rail construction, and has the advantage that the efficiency of construction is high, the construction state changes fast.
The embodiment of the application is realized as follows:
the embodiment of the application provides a combined dual-purpose steel rail laying unit, which comprises a steel rail dragging vehicle, a host, a sleeper transporting gantry crane, a traction power vehicle, a dual-purpose steel rail pushing vehicle and at least one dual-purpose sleeper transporting vehicle which are sequentially connected;
the dual-purpose steel rail pushing vehicle comprises a pushing vehicle body, a steel rail bracket and two steel rail dragging and pushing assemblies, wherein the steel rail bracket comprises two steel rail underframe frames and a fixed frame which are arranged in parallel, one end of the fixed frame is detachably connected with the pushing vehicle body, and the other end of the fixed frame is connected with the two steel rail underframe frames; the two steel rail dragging and pushing assemblies are configured to be capable of being switched between parallel arrangement and splayed arrangement, and are used for dragging and pushing the steel rails to move in a linear direction and pushing the steel rails onto the two steel rail underframe or the end part of a pushing vehicle body;
the dual-purpose sleeper transport vehicle comprises a railway flat car and a sleeper frame arranged on the railway flat car.
In some alternative embodiments, the fixing frame is connected with the middle parts of the two rail underframe through the first telescopic piece, and one ends of the two rail underframe can be connected with the fixing frame in an up-and-down rotating mode.
In some optional embodiments, the fixing frame comprises an upper supporting rod and a lower supporting rod, one end of the upper supporting rod is connected with the pushing vehicle body, the other end of the upper supporting rod is hinged with the two steel rail bottom frames through a first oil cylinder, two ends of the lower supporting rod are respectively connected with the pushing vehicle body and the upper supporting rod, and one ends of the two steel rail bottom frames are respectively rotatably connected with the lower supporting rod through a rotating shaft.
In some alternative embodiments, the rail pulling and pushing assembly comprises a frame detachably connected to the pushing body, a winch for pulling the rail is connected to the top of the frame, and at least one pushing assembly for pushing the rail in a linear direction is arranged in the frame.
In some optional embodiments, the propelling movement subassembly includes the bottom suspension fagging, one end and the articulated top suspension fagging of bottom suspension fagging, two guide wheels and be used for driving the rotatory hydraulic motor of at least one guide wheel, and two guide wheels are arranged from top to bottom and rotatably locate on bottom suspension fagging and top suspension fagging respectively, still are connected with the second extensible member between bottom suspension fagging and the top suspension fagging.
In some alternative embodiments, a top bracket is also connected to the sleeper frame, the top bracket including a double layer leg disposed on top of the sleeper frame and two L-shaped side legs; one end of each side support plate is connected with the sleeper rail frame, and the other end of each side support plate is abutted against the top of one side of the double-layer support plate.
In some optional embodiments, two ends of the sleeper frame are respectively connected with a detachable end limiting bracket.
In some optional embodiments, two gantry crane running rails are further arranged on the railway flat car and are respectively positioned on two sides of the sleeper rail frame.
The beneficial effect of this application is: the combined dual-purpose steel rail laying unit provided by the embodiment of the application comprises a steel rail dragging vehicle, a host machine, a sleeper transporting gantry crane, a traction power vehicle, a dual-purpose steel rail pushing vehicle and at least one dual-purpose sleeper transporting vehicle which are sequentially connected; the dual-purpose steel rail pushing vehicle comprises a pushing vehicle body, a steel rail bracket and two steel rail dragging and pushing assemblies, wherein the steel rail bracket comprises two steel rail underframe frames and a fixed frame which are arranged in parallel, and two ends of the fixed frame are respectively connected with the pushing vehicle body and the two steel rail underframe frames; the two steel rail dragging and pushing assemblies can be switched between parallel arrangement and splayed arrangement and are used for dragging and pushing the steel rails to move along a linear direction; the dual-purpose sleeper transport vehicle comprises a railway flat car and a sleeper frame arranged on the railway flat car. The combined type dual-purpose steel rail track laying unit provided by the embodiment of the application can realize quick switching between two construction methods of ballast track laying construction and ballastless track laying construction, and the two working conditions can realize higher construction efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a combined dual-purpose rail laying unit provided in embodiment 1 of the present application;
fig. 2 is a schematic structural diagram of the combined dual-purpose steel rail laying unit provided in embodiment 1 of the present application when performing ballastless construction;
fig. 3 is a schematic structural diagram of a first view angle of the dual-purpose rail cart according to the embodiment of the present application;
fig. 4 is a schematic structural diagram of a second view angle when the dual-purpose steel rail cart provided in the embodiment of the present application is used for performing ballast track laying construction;
fig. 5 is a structural schematic diagram of a second view angle when the dual-purpose steel rail cart provided in the embodiment of the present application is used for ballastless track laying construction;
FIG. 6 is a schematic structural diagram of a pushing assembly of the dual-purpose rail cart according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a first view angle of a dual-purpose sleeper transport vehicle according to an embodiment of the present application;
fig. 8 is a cross-sectional view of a second perspective of a dual-purpose sleeper truck according to an embodiment of the present application.
In the figure: 1. a rail tractor; 2. a host; 3. a sleeper transporting gantry crane; 4. a traction power vehicle; 5. a dual-purpose steel rail pushing vehicle; 6. a dual-purpose sleeper transport vehicle; 100. pushing the vehicle body; 110. a rail bracket; 111. a rail underframe; 112. a fixed mount; 113. an upper support rod; 114. a lower support rod; 115. a rotating shaft; 116. a connecting plate; 117. a first telescoping member; 120. a frame; 121. a winch; 122. a hydraulic motor; 123. a lower support plate; 124. an upper support plate; 125. a guide wheel; 128. a second telescoping member; 129. a base; 210. flatcar for railways; 220. a rail frame; 230. a top support; 231. a double-layer support plate; 232. a side support plate; 240. an end limiting bracket; 260. a gantry crane walking rail.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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 some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The features and properties of the present application are described in further detail below with reference to examples.
Example 1
As shown in fig. 1 and fig. 2, the embodiment of the present application provides a combined dual-purpose steel rail laying unit, which includes a steel rail tractor 1, a main machine 2, a sleeper transporting gantry crane 3, a traction power vehicle 4, a dual-purpose steel rail pusher 5, and twenty dual-purpose sleeper transporting vehicles 6, which are connected in sequence; the steel rail tractor 1, the main machine 2, the sleeper transporting gantry crane 3 and the traction power vehicle 4 are all existing vehicles, are not the key points of the application, and are not described in detail here.
Referring to fig. 3, 4, 5 and 6, the dual-purpose rail cart includes a cart body 100, a rail bracket 110 connected to one end of the cart body 100, and two rail dragging pushing assemblies disposed on the cart body 100; the rail bracket 110 comprises two rail underframe 111 and a fixed mount 112 which are arranged in parallel, one end and the middle part of the two rail underframe 111 far away from the pushing vehicle body 100 are respectively connected through a connecting plate 116, the fixed mount 112 comprises an upper support rod 113 and a V-shaped lower support rod 114, one end of the upper support rod 113 is connected with the pushing vehicle body 100 through a bolt, the other end of the upper support rod 113 is hinged with the connecting plate 116 at the middle part of the two rail underframe 111 through a first telescopic piece 117, the first telescopic piece 117 is a first oil cylinder, the cylinder body of the first oil cylinder is hinged with an upper support rod 113, a piston rod of the first oil cylinder is hinged with a connecting plate 116 in the middle of two steel rail underframe 111, one end of a lower support rod 114 is respectively connected with the pushing vehicle body 100 through a bolt, the other end of the lower support rod 114 is respectively connected with the upper support rod 113, one ends of the two steel rail underframe 111, which are close to the pushing vehicle body 100, are respectively connected with the lower support rod 114 through a rotating shaft 115 in a rotating manner, and the rotating shaft 115 is horizontally arranged and is vertical to the length direction of; the two steel rail dragging and pushing assemblies are configured to be capable of being switched between parallel arrangement and splayed arrangement, each steel rail dragging and pushing assembly comprises a frame 120 connected with a pushing vehicle body 100 through a bolt, bolt holes used for fixing the two frames 120 in parallel arrangement and splayed arrangement are respectively arranged on the pushing vehicle body 100, a winch 121 used for dragging the steel rail is connected to the top of one end of each frame 120, and two pushing assemblies used for pushing the steel rail in a linear direction are arranged in each frame 120; referring to fig. 4, the pushing assembly includes a base 129, a lower supporting plate 123 and an upper supporting plate 124, one end of which is hinged to the base 129, two guiding wheels 125, and a hydraulic motor 122 for driving the two guiding wheels 125 to rotate, the hydraulic motor 122 and the corresponding guiding wheels 125 are respectively located at two sides of the lower supporting plate 123 and the upper supporting plate 124, the two guiding wheels 125 are arranged up and down and rotatably located on the lower supporting plate 123 and the upper supporting plate 124, a second telescopic member 128 is further connected between the lower supporting plate 123 and the upper supporting plate 124, the second telescopic member 128 is a second oil cylinder, a cylinder body of the second oil cylinder is hinged to the lower supporting plate 123, and a piston rod of the second oil cylinder is hinged to the upper supporting plate 124.
Referring to fig. 7 and 8, the dual-purpose sleeper transport vehicle 6 includes a railway flat car 210, a sleeper frame 220 disposed on the railway flat car 210, and two gantry crane running rails 260 respectively located at two sides of the sleeper frame 220, the sleeper frame 220 is further connected with a top bracket 230, and the top bracket 230 includes a double-layer support plate 231 disposed at the top of the sleeper frame 220 and two L-shaped side support plates 232; one end of each side support plate 232 is connected with the sleeper rail frame 220, the other end of each side support plate supports against the top of one side of the double-layer support plate 231, and two ends of the sleeper rail frame 220 are respectively connected with a detachable end limiting support 240.
The combined type dual-purpose steel rail track laying unit provided by the embodiment of the application can realize two construction methods of ballast track laying construction and ballastless steel rail construction, and has the advantages of high construction efficiency and fast construction state transition. The combined dual-purpose steel rail laying unit comprises a steel rail dragging vehicle 1, a main machine 2, a sleeper transporting gantry crane 3, a traction power vehicle 4, a dual-purpose steel rail pushing vehicle 5 and twenty dual-purpose sleeper transporting vehicles 6 which are connected in sequence.
When ballast track laying construction needs to be carried out, a steel rail dragging vehicle 1, a host machine 2, a sleeper transporting gantry crane 3, a traction power vehicle 4, a dual-purpose steel rail pushing vehicle 5 and twenty dual-purpose sleeper transporting vehicles 6 are used for operation, at the moment, the state of the dual-purpose steel rail pushing vehicle 5 is firstly adjusted, bolts, connected with a pushing vehicle body 100, of an upper support rod 113 and two lower support rods 114 are disassembled, a steel rail bracket 110 is separated from the pushing vehicle body 100, the bolts, connected with the pushing vehicle body 100, of a frame 120 in two steel rail dragging pushing components are loosened after the steel rail bracket 110 is disassembled, the arrangement position of the frame 120 in the two steel rail dragging components is adjusted to be splayed, the frame 120 is fixed on the pushing car body 100 by using the bolts again, and at the moment, the two steel rail dragging and pushing assemblies can be used for dragging and pushing the steel rails to the traction power car 4 at one end of the pushing car body 100 to perform ballast track laying construction. At this time, the rail dragging and pushing assembly of the dual-purpose rail pushing vehicle 5 performs operation, firstly, a winch 121 arranged at the top of the frame 120 drives a steel wire rope to pull the rail transported by the dual-purpose sleeper transport vehicle 6 to move, so that one end of the rail enters the frame 120, and the two pushing assemblies in the frame 120 are used for pushing the rail to move from the other end of the frame 120 to one end of the pushing vehicle body 100; the working principle of the pushing assembly is that after one end of the steel rail penetrates between the two guide wheels 125, the second telescopic part 128 drives the upper support plate 124 and the guide wheels 125 to rotate relative to the lower support plate 123 and the guide wheels 125 through telescopic movement, so that the two guide wheels 125 clamp the steel rail up and down, and the two guide wheels 125 are driven by the two hydraulic motors 122 to rotate respectively to push the steel rail to move.
When ballastless steel rail construction needs to be carried out, firstly, a steel rail dragging vehicle 1 is separated from a host machine 2, then a sleeper transporting gantry crane 3, a traction power vehicle 4, a dual-purpose steel rail pushing vehicle 5 and a plurality of dual-purpose sleeper rail transport vehicles 6 are dragged back to a base by the host machine 2, the sleeper transporting gantry crane 3 and the traction power vehicle 4 are separated, and the dual-purpose steel rail pushing vehicle 5 is adjusted to be in a ballastless construction state: firstly, connecting a steel rail bracket 110 with a pushing trolley body 100, respectively connecting an upper support rod 113 and two lower support rods 114 with the pushing trolley body 100 through bolts, then loosening the bolts for connecting a frame 120 in two steel rail dragging and pushing components with the pushing trolley body 100, adjusting the arrangement position of the frame 120 in the two steel rail dragging and pushing components to be parallel to arrangement, and then fixing the frame 120 on the pushing trolley body 100 by using the bolts again; at the moment, a locomotive is utilized to push the dual-purpose steel rail pushing vehicle 5 and the multiple sequentially connected dual-purpose sleeper trucks 6 to the starting end of ballastless construction, ballastless construction equipment consisting of the steel rail dragging vehicle 1, the dual-purpose steel rail pushing vehicle 5 and the multiple sequentially connected dual-purpose sleeper trucks 6 is utilized to carry out operation, at the moment, two steel rail dragging and pushing assemblies can be utilized to drag and push steel rails to the steel rail underframe 111 corresponding to the steel rail dragging and pushing assemblies, when the steel rails are pushed and moved to the steel rail underframe 111 corresponding to the steel rail dragging and pushing assemblies, the first oil cylinder extends out of the piston rod to push the steel rail underframe 111 to rotate relative to the rotating shaft 115, one end, far away from the pushing vehicle body 100, of the steel rail underframe 111 rotates downwards, the steel rails on the two steel rail underframe 111 are pushed to a rail bearing groove of a sleeper below, and accordingly ballastless construction is achieved.
When ballast track laying construction is carried out, the area formed by enclosing the inside of the sleeper frame 220 on the railway flat car 210 can be used for transporting steel rails, sleepers can be transported in the middle of the sleeper frame 220, and meanwhile, the two ends of the sleeper frame 220 are provided with end limiting supports 240 for limiting the positions of the sleepers, and the top support 230 is not installed. During construction of a ballastless track, in order to improve transportation efficiency, a top bracket 230 is connected to the sleeper frame 220, and the top bracket 230 includes a double-layer support plate 231 arranged on the top of the sleeper frame 220 and two L-shaped side support plates 232, so that more steel rails can be supported and transported by the top of the double-layer support plate 231.
In some alternative embodiments, the two rail chassis 111 of the dual-purpose rail cart can be fixedly connected to the fixing frame 112, so that the two rail chassis 111 can be detachably fixed to the cart body 100 by using the fixing frame 112. Optionally, the first extensible member and the second extensible member may also be telescopic devices such as an electro-hydraulic push rod and an electric push rod.
The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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.
Claims (8)
1. A combined dual-purpose steel rail laying unit is characterized by comprising a steel rail dragging vehicle, a main machine, a sleeper transporting gantry crane, a traction power vehicle, a dual-purpose steel rail pushing vehicle and at least one dual-purpose sleeper transporting vehicle which are sequentially connected;
the dual-purpose steel rail pushing vehicle comprises a pushing vehicle body, a steel rail bracket and two steel rail dragging pushing assemblies, wherein the steel rail bracket comprises two steel rail underframe frames and a fixed frame which are arranged in parallel, one end of the fixed frame is detachably connected with the pushing vehicle body, and the other end of the fixed frame is connected with the two steel rail underframe frames; the two steel rail dragging and pushing assemblies are configured to be capable of being switched between a parallel arrangement and a splayed arrangement, and are used for dragging and pushing steel rails to move in a linear direction, and pushing the steel rails onto two steel rail underframe or to the end part of a pushing vehicle body;
the dual-purpose sleeper transport vehicle comprises a railway flat car and a sleeper frame arranged on the railway flat car.
2. The combined dual-purpose steel rail laying unit according to claim 1, wherein the fixing frame is connected with the middle parts of the two steel rail bottom frames through a first telescopic member, and one end of the two steel rail bottom frames is connected with the fixing frame in a manner of being capable of rotating up and down.
3. The combined dual-purpose steel rail laying unit according to claim 2, wherein the fixing frame comprises an upper supporting rod and a lower supporting rod, one end of the upper supporting rod is connected with the pushing vehicle body, the other end of the upper supporting rod is hinged with the two steel rail bottom frames through a first oil cylinder, two ends of the lower supporting rod are respectively connected with the pushing vehicle body and the upper supporting rod, and one ends of the two steel rail bottom frames are respectively connected with the lower supporting rod through a rotating shaft in a rotating manner.
4. The combined dual-purpose steel rail laying unit according to claim 1, wherein the steel rail dragging pushing assembly comprises a frame detachably connected with the pushing vehicle body, a winch for dragging the steel rail is connected to the top of the frame, and at least one pushing assembly for pushing the steel rail in a linear direction is arranged in the frame.
5. The combined dual-purpose steel rail laying unit according to claim 4, wherein the pushing assembly comprises a lower support plate, an upper support plate with one end hinged to the lower support plate, two guide wheels and a hydraulic motor for driving at least one of the guide wheels to rotate, the two guide wheels are vertically arranged and rotatably arranged on the lower support plate and the upper support plate respectively, and a second telescopic member is further connected between the lower support plate and the upper support plate.
6. The combined dual-purpose steel rail laying unit according to claim 1, wherein a top bracket is further connected to the sleeper frame, the top bracket including a double-layered support plate disposed on top of the sleeper frame and two L-shaped side support plates; one end of each side support plate is connected with the sleeper rail frame, and the other end of each side support plate is pressed against the top of one side of the double-layer support plate.
7. The combined dual-purpose steel rail laying unit according to claim 1, wherein both ends of the sleeper frame are respectively connected with a detachable end limiting bracket.
8. The combined dual-purpose steel rail laying unit according to claim 1, wherein the railway flatcar is further provided with two gantry crane running rails respectively positioned at two sides of the sleeper frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921551399.7U CN210856813U (en) | 2019-09-18 | 2019-09-18 | Combined two-purpose rail laying machine set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921551399.7U CN210856813U (en) | 2019-09-18 | 2019-09-18 | Combined two-purpose rail laying machine set |
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| Publication Number | Publication Date |
|---|---|
| CN210856813U true CN210856813U (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921551399.7U Active CN210856813U (en) | 2019-09-18 | 2019-09-18 | Combined two-purpose rail laying machine set |
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| CN (1) | CN210856813U (en) |
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- 2019-09-18 CN CN201921551399.7U patent/CN210856813U/en active Active
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