Railway ballast screening vehicle and system thereof

Abstract

The invention provides a railway ballast screening vehicle and a system thereof. The railway ballast screening vehicle comprises a vehicle body, a chassis is arranged at the bottom of the vehicle body, steel rail walking mechanisms are arranged at the two ends of the chassis, and a cab and an operation arm are arranged at the top of the vehicle body; and the supporting assembly is arranged at the top of the vehicle body. According to the railway ballast screening vehicle and the system thereof, through mutual cooperation of the vehicle body, the crawler walking mechanism, the steel rail walking mechanism, the operation arm, the screening assembly and the conveying assembly, when the railway ballast screening vehicle is used, the railway ballast screening vehicle can independently go up and down rails, adapt to various line environments and complete the operation procedures of ballast digging, screening, conveying and the like; therefore, the stone ballast screening efficiency is improved, the labor intensity of workers is reduced, the vibrator drives the screen to conduct high-strength vibration, the railway ballast screening effect can be improved, and waste of the stone ballast is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of railway maintenance engineering machinery, and in particular to a railway ballast screening vehicle and a system thereof. Background Art

[0002] Ballast is coarse gravel or crushed stone used for laying railway roadbeds, mainly for railway subgrades. The gaps between ballasts can drain rainwater faster, and the presence of ballasts also facilitates the adjustment and maintenance of rail gauges and the smoothness of the line. During vehicle operation, ballast can reduce the vibration and noise it brings. After long-term use of railway lines, the roadbed is dirty and the ballast is broken. The line has problems such as compaction, slurry and mud, which have a great impact on the line status and performance. The relevant railway departments will regularly clean and screen the line every year. The cleaning and screening will dig out the ballast from the roadbed and place it in a screening device to separate it from dirt and waste ballast. The clean and up-to-standard ballast will be backfilled into the roadbed, and the dirt and waste ballast will be sent out of the line.

[0003] At present, large-scale road maintenance machinery ballast cleaning machines are mainly used for cleaning and screening operations. However, their scope of application is limited by factors such as the line environment and economic efficiency of use. As a result, in daily line maintenance operations such as cleaning of small sections, turnouts and station yards, the mode of operation is generally manually configured with small tools.

[0004] However, the operation mode of manually configuring small-scale tools and machines has the problems of low efficiency and high labor intensity. At the same time, the screening effect is not ideal. Therefore, the method of replacing new ballast and discarding all old ballast is often adopted, which causes a certain waste of ballast resources.

[0005] Therefore, it is necessary to provide a railway ballast screening vehicle and a system thereof to solve the above-mentioned technical problems. Summary of the invention

[0006] The invention provides a railway ballast screening vehicle, which solves the problems of low efficiency, high labor intensity, poor screening effect, need to replace new ballast and discard old ballast, and waste of ballast resources in manual operation with small-sized tools.

[0007] In order to solve the above technical problems, the present invention provides a railway ballast screening vehicle, comprising:

[0008] A vehicle body, wherein a chassis is disposed at the bottom of the vehicle body, rail running mechanisms are disposed at both ends of the chassis, and a cab and an operating arm are disposed at the top of the vehicle body;

[0009] A support assembly, the support assembly being arranged on the top of the vehicle body;

[0010] A screening component, wherein the screening component is arranged on the top of the supporting component, the screening component comprises a frame component, two mounting components and a screen, the frame component is arranged on the top of the supporting component, the two mounting components are respectively fixedly mounted on both sides of the inner side surface of the frame component, the screen is arranged in the middle of the two frame components, the frame component comprises a screen frame, a material guide frame and a vibrator, the material guide frame is fixedly mounted on the bottom of the material guide frame, the vibrator is fixedly mounted on the bottom of the screen frame, the two mounting components each comprise a mounting bar, an arcuate bar, mounting screws and connecting bolts, the mounting bars are respectively arranged on both sides of the inner side surface of the screen frame, the arcuate bar is clamped at the bottom of the mounting bar, the mounting screws are arranged inside the arcuate bar, the connecting bolts are arranged inside the screen frame, and one end of the connecting bolt is threadedly connected to the inside of the mounting bar;

[0011] The conveying assembly is arranged at the bottom of the screening assembly, and the conveying assembly comprises a first conveying frame, a foldable telescopic rod, a support frame, a driving member, a conveyor belt, a tensioning assembly, a rotating shaft and a second conveying frame, the support frame is fixedly installed at the bottom of the screening frame, the first conveying frame is fixedly installed on the top of the support frame, the second conveying frame is rotatably connected to one end of the first conveying frame, one end of the foldable telescopic rod is respectively rotatably connected to one end of both sides of the first conveying frame, the other end of the foldable telescopic rod is rotatably connected to the side of the second conveying frame, the tensioning assemblies are respectively fixedly installed on both sides of one end of the second conveying frame, the rotating shaft is respectively rotatably connected to the inside of the tensioning assembly and the other end of the inner side surface of the first conveying frame, the driving member is fixedly installed on one side of the other end of the first conveying frame, and the conveying end of the driving member is fixedly installed on one end of one of the rotating shafts, and the conveying is respectively sleeved on the outer side surfaces of the two rotating shafts.

[0012] Preferably, the working arm is arranged on the side of the cab, and a crawler walking mechanism is arranged at the bottom of the chassis.

[0013] Preferably, the support assembly includes a frame, a spring isolation seat, the mounting seat and a cross beam, the frame is fixedly mounted on the top of the vehicle body, the spring isolation seats are respectively fixedly mounted on the four sides of the top of the frame, the mounting seat is fixedly mounted on the top of the spring isolation seat, and both ends of the cross beam are arranged inside the mounting seat.

[0014] Preferably, the cross beam is fixedly mounted inside the screen frame, and the cross beam is arranged at the bottom of the screen.

[0015] Preferably, both sides of the screen frame are rotatably connected with connecting rods, and one end of the connecting rods is fixedly mounted with a material receiving plate.

[0016] Preferably, the bottom of the material guiding frame is arranged on the top of the conveyor belt.

[0017] Preferably, support plates are fixedly installed at both ends of the outer side surface of the cross beam, a top plate is fixedly installed on the top of the support plate, the interiors of both ends of the top plate are threadedly connected with fixing screws, and a clamping plate is provided on the outer side surface of the fixing screws.

[0018] Preferably, the top of the top plate is attached to the bottom of the screen, and the clamping plate is arranged on the top of the screen.

[0019] Preferably, a rotating seat is fixedly installed at the bottom of the screen frame, and a material guide plate is rotatably connected inside the rotating seat. Slide grooves are provided on both sides of the material guide plate, and the inner side of the slide groove is slidably connected to a slide rod, and the outer side of the slide rod is rotatably connected to a pneumatic telescopic rod.

[0020] Preferably, a fixing block is fixedly mounted on the outer side surface of the pneumatic telescopic rod, and the fixing block is fixedly mounted on the side surface of the screen frame.

[0021] Preferably, a railway ballast screening system uses the above-mentioned railway ballast screening vehicle.

[0022] Compared with the related art, the railway ballast screening vehicle and system provided by the present invention have the following advantages:

[0023] Beneficial effects:

[0024] The present invention provides a railway ballast screening vehicle and a system thereof. The vehicle body, crawler traveling mechanism, rail traveling mechanism, working arm, screening assembly and conveying assembly cooperate with each other. When in use, the vehicle can independently go up and down the rails and adapt to various line environments to complete ballast digging, screening, conveying and other operation processes. Manual labor is only used for assistance, thereby increasing the efficiency of ballast screening and reducing the labor intensity of manual labor. In addition, the vibrator drives the screen to vibrate with high intensity, which can increase the effect of ballast screening and reduce the waste of ballast. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a first embodiment of a railway ballast screening vehicle provided by the present invention;

[0026] Figure 2 for Figure 1 The working state diagram shown;

[0027] Figure 3 for Figure 2 Another perspective structural schematic diagram shown;

[0028] Figure 4 for Figure 1 The side structural diagram shown;

[0029] Figure 5 for Figure 1 The schematic diagram of the screening component and the conveying component structure shown;

[0030] Figure 6 for Figure 5 The side structural diagram of the screening assembly shown;

[0031] Figure 7 for Figure 5 A schematic diagram of the enlarged structure of part A shown;

[0032] Figure 8 for Figure 5 The enlarged structural diagram of part B is shown;

[0033] Fig. 9 A schematic structural diagram of a second embodiment of a railway ballast screening vehicle provided by the present invention;

[0034] Fig.10 A schematic structural diagram of a third embodiment of a railway ballast screening vehicle provided by the present invention.

[0035] Numbers in the figure: 1, vehicle body; 11, cab; 12, chassis; 13, crawler running mechanism; 14, rail running mechanism; 15, working arm;

[0036] 2. Screening assembly; 21. Frame assembly; 211. Screen frame; 212. Material guide frame; 213. Vibrator; 22. Mounting assembly; 221. Mounting strip; 222. Arc strip; 223. Mounting screw; 224. Connecting bolt; 23. Screen;

[0037] 3. Material collecting plate; 31. Connecting rod;

[0038] 4. Conveying assembly; 41. First conveying frame; 42. Folding telescopic rod; 43. Support frame; 44. Driving member; 45. Conveying belt; 47. Tensioning assembly; 48. Rotating shaft; 49. Second conveying frame;

[0039] 5. Support assembly; 51. Frame; 52. Spring isolation seat; 53. Mounting seat; 54. Crossbeam;

[0040] 6. Support plate; 61. Top plate; 62. Clamping plate; 63. Fixing screws;

[0041] 7. Rotating seat; 71. Material guide plate; 72. Slide slot; 73. Pneumatic telescopic rod; 74. Slide rod; 75. Fixed block. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0043] First embodiment

[0044] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 ,in, Figure 1 A schematic structural diagram of a first embodiment of a railway ballast screening vehicle provided by the present invention; Figure 2 for Figure 1 The working state diagram shown; Figure 3 for Figure 2 Another perspective structural schematic diagram shown; Figure 4 for Figure 1 The side structural diagram shown; Figure 5 for Figure 1 The schematic diagram of the screening component and the conveying component structure shown;

[0045] Figure 6 for Figure 5 The side structural diagram of the screening assembly shown; Figure 7 for Figure 5 A schematic diagram of the enlarged structure of part A shown; Figure 8 for Figure 5 A railway ballast screening vehicle comprises: a vehicle body 1, a chassis 12 is arranged at the bottom of the vehicle body 1, rail running mechanisms 14 are arranged at both ends of the chassis 12, and a cab 11 and an operating arm 15 are arranged at the top of the vehicle body 1;

[0046] A support assembly 5, wherein the support assembly 5 is arranged on the top of the vehicle body 1;

[0047] The screening component 2 is arranged on the top of the supporting component 5. The screening component 2 includes a frame component 21, two mounting components 22 and a screen 23. The frame component 21 is arranged on the top of the supporting component 5. The two mounting components 22 are respectively fixedly mounted on both sides of the inner side of the frame component 21. The screen 23 is arranged in the middle of the two frame components 21. The frame component 21 includes a screen frame 211, a guide frame 212 and a vibrator 213. The guide frame 212 is fixedly mounted on the bottom of the guide frame 212. The vibrator 213 is fixedly mounted on the bottom of the screen frame 211, and the two mounting components 22 each include a mounting bar 221, an arc-shaped bar 222, a mounting screw 223 and a connecting bolt 224. The mounting bars 221 are respectively arranged on both sides of the inner side of the screen frame 211, the arc-shaped bar 222 is clamped on the bottom of the mounting bar 221, the mounting screw 223 is arranged inside the arc-shaped bar 222, the connecting bolt 224 is arranged inside the screen frame 211, and one end of the connecting bolt 224 is threadedly connected to the inside of the mounting bar 221;

[0048] The conveying assembly 4 is arranged at the bottom of the screening assembly 2, and the conveying assembly 4 includes a first conveying frame 41, a folding telescopic rod 42, a support frame 43, a driving member 44, a conveying belt 45, a tensioning assembly 47, a rotating shaft 48 and a second conveying frame 49. The support frame 43 is fixedly installed at the bottom of the screening frame 211, the first conveying frame 41 is fixedly installed at the top of the support frame 43, the second conveying frame 49 is rotatably connected to one end of the first conveying frame 41, and one end of the folding telescopic rod 42 is rotatably connected to the first conveying frame 49. 1, the other end of the folding telescopic rod 42 is rotatably connected to the side of the second conveying frame 49, the tensioning components 47 are respectively fixedly installed on both sides of one end of the second conveying frame 49, the rotating shaft 48 is respectively rotatably connected to the inside of the tensioning component 47 and the other end of the inner side of the first conveying frame 41, the driving member 44 is fixedly installed on one side of the other end of the first conveying frame 41, and the conveying end of the driving member 44 is fixedly installed on one end of the rotating shaft 48, and the conveying shafts 45 are respectively sleeved on the outer sides of the two rotating shafts 48.

[0049] The working arm 15 is disposed on the side of the cab 11 , and a crawler walking mechanism 13 is disposed at the bottom of the chassis 12 .

[0050] The support assembly 5 includes a frame 51, a spring isolation seat 52, a mounting seat 53 and a crossbeam 54. The frame 51 is fixedly mounted on the top of the vehicle body 1, the spring isolation seat 52 is fixedly mounted on the four sides of the top of the frame 51, the mounting seat 53 is fixedly mounted on the top of the spring isolation seat 52, and both ends of the crossbeam 54 are arranged inside the mounting seat 53.

[0051] The cross beam 54 is fixedly installed inside the screen frame 211 , and the cross beam 54 is arranged at the bottom of the screen 23 .

[0052] Both sides of the screen frame 211 are rotatably connected with connecting rods 31 , and one end of the connecting rod 31 is fixedly mounted with a material receiving plate 3 .

[0053] The bottom of the material guiding frame 212 is disposed on the top of the conveyor belt 45 .

[0054] The vehicle body 1 and the working device are respectively mounted on the front and rear ends of the chassis 12. By manipulating the vehicle body 1 (or other equipment to load materials) to the working device, the working device performs vibration screening and waste conveying functions to separate the dirt and broken ballast from the old ballast, leaving clean ballast that meets the specifications to be backfilled into the roadbed, and the waste is conveyed to a designated point for collection;

[0055] The vehicle body 1 integrates a power system, a hydraulic system, a cooling system, a driver's cab 11 and an operating arm 15, and can rotate 360 ​​degrees; the vehicle body 1 controls the movement of the entire vehicle and provides a power source, and its operating arm 15 can be equipped with different operating attachments to cooperate in completing a variety of line maintenance operations;

[0056] The chassis 12 carries the vehicle body 1 and the operating device, and can travel on general roads or on rails. It integrates a crawler running mechanism 13 and a rail running mechanism 14. The crawler running mechanism 13 is mounted on both sides of the chassis 12. The rail running mechanism 14 has a driving wheel pair and a driven wheel pair, which are respectively mounted on the front and rear ends of the chassis 12. The retractable rod controls the folding and lowering. When traveling on general roads, crawler running is adopted, and the rail running mechanism 14 is in a folded state; when traveling on rails, the rail running mechanism 14 is lowered to support the whole vehicle for traveling; when operating, the rail running mechanism 14 is lowered and attached to the top of the rail, and crawler running is adopted. The rail running mechanism 14 plays a guiding role to prevent derailment. At this time, the rail wheel is in a free follower state;

[0057] The operating device is composed of a support component 5, a screening component 2, and a conveying component 4, which are movably installed at the rear end of the chassis 12. The support component 5 serves as a bearing device, and the screening component 2 and the conveying component 4 are movably installed on the support component 5; the screening component 2 is composed of a frame component 21, a mounting component 22, and a screen 23, and the material placed on the screen 23 is screened, and the clean material is backfilled into the roadbed, and the waste material is collected in the screen frame 211. The screening device is a circular vibrating screen with a strong excitation force suitable for screening old ballast. A discharge hole is reserved at the bottom of the guide frame 212, and the waste material is placed on the conveyor belt 45 through the discharge hole and discharged; the conveying component is composed of a conveying frame, a rotating shaft 48, a conveyor belt 45, etc., and the waste material in the screen frame 211 is transported to the outside of the line, and can be transported on both sides of the line. The conveying distance is freely adjustable. The device is divided into two sections, and the folding action of any section can be realized through the hinge point and the folding telescopic rod 42, and the folding angle is freely adjustable;

[0058] A crossbeam 54 passes through the middle of the screen frame 211 to increase the overall strength and rigidity; the woven high-carbon steel screen 23 has good wear resistance and is suitable for ballast screening; the receiving plates 3 are movably installed on both sides of the screen frame 211 to increase the receiving area, and the receiving plates 3 are fixed by connecting rods 31; the screen surface is set at an inclination angle of 15° to 25°, and the two sides of the screen 23 are hooked with hooking devices. In order to make the screened materials evenly distributed on the screen surface, the screen surface is installed in an arch shape, and the screen is fixed in the middle by a central support structure; at the four corners of the screen frame 211, spring mounting seats 53 are movably installed at both ends of the two crossbeams 54, and then connected to the spring isolation seats 52 movably installed on the frame 51, and the whole falls on the frame 51;

[0059] The cross beam 54 can be a box beam or a corrugated beam, and this type of cross beam is widely used in large-scale vibrating screens.

[0060] The working principle of a railway ballast screening vehicle provided by the present invention is as follows:

[0061] When in use, the track running mechanism 13 is lifted up by bending the rail running mechanism 14 downward, so that the rail running mechanism 14 is in contact with the rail, and then the rail running mechanism 14 drives the vehicle body 1 to move on the rail, and during the movement, the working arm 15 is used to dig out the stones on the ballast and then transfer them to the top of the screening assembly 2;

[0062] Then, the screening component 2 is started, and the vibrator 213 drives the screen frame 211 to vibrate up and down, so as to screen the crushed stones that fall onto the screen 23, so that the crushed stones pass through the screen 23 and fall back onto the track, and the generated impurities and soil pass through the guide frame 212 and fall onto the conveying component 4;

[0063] Then, the conveying assembly 4 is started, so that the driving member 44 drives the rotating shaft 48 to rotate, and then the rotating shaft 48 drives the conveying belt 45 to move, so as to convey and transfer the collected impurities.

[0064] Compared with the related art, the railway ballast screening vehicle provided by the present invention has the following beneficial effects:

[0065] Through the cooperation of the vehicle body 1, the crawler running mechanism 13, the rail running mechanism 14, the working arm 15, the screening component 2 and the conveying component 4, when in use, they can independently go up and down the rails, adapt to various line environments, and complete the ballast digging, screening, conveying and other operation processes. Manual labor is only used for auxiliary work, thereby increasing the efficiency of ballast screening and reducing the labor intensity of manual labor. In addition, the vibrator 213 drives the screen 23 to vibrate with high intensity, which can increase the effect of ballast screening and reduce the waste of ballast.

[0066] The present invention also provides a railway ballast screening system, which uses the above-mentioned railway ballast screening vehicle.

[0067] Second embodiment

[0068] Please refer to Fig. 9 Based on the railway ballast screening vehicle provided in the first embodiment of the present application, the second embodiment of the present application proposes another railway ballast screening vehicle. The second embodiment is only a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0069] Specifically, the second embodiment of the present application provides a railway ballast screening vehicle that is different in that, in a railway ballast screening vehicle, support plates 6 are fixedly installed at both ends of the outer side of the cross beam 54, a top plate 61 is fixedly installed on the top of the support plate 6, and fixing screws 63 are threadedly connected to the interior of the two ends of the top plate 61, and a clamping plate 62 is provided on the outer side of the fixing screw 63.

[0070] The top of the top plate 61 is attached to the bottom of the screen 23 , and the clamping plate 62 is disposed on the top of the screen 23 .

[0071] The working principle of a railway ballast screening vehicle provided by the present invention is as follows:

[0072] When in use, the top plate 61 is installed at the bottom of the screen 23, and the clamping plate 62 is placed on the top of the screen 23, and then the fixing screws 63 are passed through the clamping plate 62 and the screen 23 and then threadedly connected to the top of the top plate 61, so that the screen 23 can be limited and supported.

[0073] Compared with the related art, the railway ballast screening vehicle provided by the present invention has the following beneficial effects:

[0074] By means of the cooperation of structures such as the support plate 6, the top plate 61, the clamping plate 62 and the fixing screws 63, when in use, the top plate 61 is placed at the bottom of the screen 23, and the clamping plate 62 is placed at the top of the screen 23. Then, the fixing screws 63 pass through the clamping plate 62 and are threadedly connected to the top of the top plate 61, thereby clamping and supporting the screen, thereby preventing the middle position of the screen 23 from collapsing and affecting the screening effect.

[0075] Third embodiment

[0076] Please refer to Fig.10 Based on the railway ballast screening vehicle provided in the first embodiment of the present application, the third embodiment of the present application proposes another railway ballast screening vehicle. The third embodiment is only a preferred embodiment of the first embodiment, and the implementation of the third embodiment will not affect the independent implementation of the first embodiment.

[0077] Specifically, the difference of a railway ballast screening vehicle provided in the third embodiment of the present application is that, in a railway ballast screening vehicle, a rotating seat 7 is fixedly installed at the bottom of the screen frame 211, and a material guide plate 71 is rotatably connected inside the rotating seat 7. Both sides of the material guide plate 71 are provided with slide grooves 72, and the inner side surface of the slide groove 72 is slidably connected to a slide rod 74, and the outer side surface of the slide rod 74 is rotatably connected to a pneumatic telescopic rod 73.

[0078] A fixing block 75 is fixedly mounted on the outer side surface of the pneumatic telescopic rod 73 , and the fixing block 75 is fixedly mounted on the side surface of the screen frame 211 .

[0079] The working principle of a railway ballast screening vehicle provided by the present invention is as follows:

[0080] When in use, the stones falling from the screen 23 will fall onto the guide plate 71, and the guide plate 71 can guide the stones to prevent them from falling onto the vehicle body 1. After the user finishes using the device, the pneumatic telescopic rod 73 can be started to extend the pneumatic telescopic rod 73, so that the slide bar 74 slides on the inner side of the slide groove 72, and the guide plate 71 is adjusted to a vertical state with the screen frame 211, thereby storing the guide plate 71.

[0081] Compared with the related art, the railway ballast screening vehicle provided by the present invention has the following beneficial effects:

[0082] By means of the cooperation between the rotating seat 7, the guide plate 71, the slide groove 72, the pneumatic telescopic rod 73, the slide bar 74 and the fixed block 75, when in use, the angle of the guide plate 71 can be adjusted by starting the telescopic rod 73, so as to guide the stones after screening and prevent the stones from falling onto the vehicle body 1.

[0083] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A railway ballast screening vehicle, characterized in that: include: A vehicle body, wherein a chassis is arranged at the bottom of the vehicle body, rail running mechanisms are arranged at both ends of the chassis, and a cab and an operating arm are arranged at the top of the vehicle body; A support assembly, the support assembly being arranged on the top of the vehicle body; A screening component, wherein the screening component is arranged on the top of the supporting component, the screening component comprises a frame component, two mounting components and a screen, the frame component is arranged on the top of the supporting component, the two mounting components are respectively fixedly mounted on both sides of the inner side surface of the frame component, the screen is arranged in the middle of the two frame components, the frame component comprises a screen frame, a material guide frame and a vibrator, the material guide frame is fixedly mounted on the bottom of the material guide frame, the vibrator is fixedly mounted on the bottom of the screen frame, the two mounting components each comprise a mounting bar, an arcuate bar, mounting screws and connecting bolts, the mounting bars are respectively arranged on both sides of the inner side surface of the screen frame, the arcuate bar is clamped at the bottom of the mounting bar, the mounting screws are arranged inside the arcuate bar, the connecting bolts are arranged inside the screen frame, and one end of the connecting bolt is threadedly connected to the inside of the mounting bar; The conveying assembly is arranged at the bottom of the screening assembly, and the conveying assembly comprises a first conveying frame, a foldable telescopic rod, a support frame, a driving member, a conveyor belt, a tensioning assembly, a rotating shaft and a second conveying frame, the support frame is fixedly installed at the bottom of the screening frame, the first conveying frame is fixedly installed on the top of the support frame, the second conveying frame is rotatably connected to one end of the first conveying frame, one end of the foldable telescopic rod is respectively rotatably connected to one end of both sides of the first conveying frame, the other end of the foldable telescopic rod is rotatably connected to the side of the second conveying frame, the tensioning assemblies are respectively fixedly installed on both sides of one end of the second conveying frame, the rotating shaft is respectively rotatably connected to the inside of the tensioning assembly and the other end of the inner side surface of the first conveying frame, the driving member is fixedly installed on one side of the other end of the first conveying frame, and the conveying end of the driving member is fixedly installed on one end of one of the rotating shafts, and the conveying is respectively sleeved on the outer side surfaces of the two rotating shafts.

2. A railway ballast screening vehicle according to claim 1, characterized in that: The working arm is arranged on the side of the cab, and a crawler walking mechanism is arranged at the bottom of the chassis.

3. A railway ballast screening vehicle according to claim 1, characterized in that: The support assembly includes a frame, a spring isolation seat, a mounting seat and a crossbeam. The frame is fixedly mounted on the top of the vehicle body, the spring isolation seats are respectively fixedly mounted on the four sides of the top of the frame, the mounting seat is fixedly mounted on the top of the spring isolation seat, and both ends of the crossbeam are arranged inside the mounting seat.

4. A railway ballast screening vehicle according to claim 3, characterized in that: The cross beam is fixedly mounted inside the screen frame, and the cross beam is arranged at the bottom of the screen.

5. The railway ballast screening vehicle according to claim 1, characterized in that: Both sides of the screen frame are rotatably connected with connecting rods, and one end of the connecting rod is fixedly installed with a material receiving plate.

6. The railway ballast screening vehicle according to claim 1, characterized in that: The bottom of the material guiding frame is arranged on the top of the conveyor belt.

7. The railway ballast screening vehicle according to claim 3, characterized in that: Support plates are fixedly installed at both ends of the outer side of the cross beam, a top plate is fixedly installed on the top of the support plate, fixing screws are threadedly connected inside at both ends of the top plate, and a clamping plate is arranged on the outer side of the fixing screw.

8. A railway ballast screening vehicle according to claim 7, characterized in that: The top of the top plate is attached to the bottom of the screen, and the clamping plate is arranged on the top of the screen.

9. The railway ballast screening vehicle according to claim 1, characterized in that: A rotating seat is fixedly installed at the bottom of the screen frame, and a material guide plate is rotatably connected inside the rotating seat. Slide grooves are provided on both sides of the material guide plate. A sliding rod is slidably connected to the inner side of the sliding groove, and a pneumatic telescopic rod is rotatably connected to the outer side of the sliding rod.

10. A railway ballast screening system, characterized in that: A railway ballast screening vehicle according to claim 1 to claim 9 is used.

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