Screening machine

Abstract

The utility model discloses a screening machine which comprises a movable base, the movable base comprises a supporting platform and walking crawler wheels arranged on the left side and the right side of the supporting platform, an excavating mechanism is arranged on the supporting platform in a rotating mode, movable switching mechanisms are arranged on the front side and the rear side of the supporting platform, and rail wheels are arranged on the movable switching mechanisms. The moving conversion mechanism is provided with an engine connected with rail wheels, the supporting platform is provided with a connecting mechanism, the connecting mechanism is provided with a vibrating screen, the vibrating screen is provided with a coarse material outlet and a fine material outlet, the connecting mechanism is provided with a rotating component, and the rotating component is connected with the connecting mechanism. A first transverse conveying belt used for conveying materials at the fine material outlet is arranged at the top of the rotating component. The device has the advantages of simplicity and convenience in construction, stability in operation and high working efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway engineering, and in particular relates to a screening machine. Background Art

[0002] After long-term use, railway lines experience contamination of the roadbed and fragmentation of ballast, significantly impacting the condition and performance of the line. Contaminated ballast first causes the roadbed to lose its elasticity and drainage properties, and then leads to compaction. This compaction is detrimental to transportation and production. Therefore, when the contamination level of the crushed stone or pebble roadbed exceeds 25% by weight, it must be screened.

[0003] The basic working principle of a ballast cleaning machine is as follows: ballast is excavated with a chain rake; ballast is separated from dirt in a cleaning mechanism; clean and compliant ballast is returned to the track bed via a return mechanism. Dirt and ballast are then transported out of the track.

[0004] The structure of a screening machine usually consists of an excavation mechanism, a screening mechanism, a backfill mechanism, a traveling and lifting mechanism, a dirt cleaning mechanism and an electrical control mechanism.

[0005] The problem with the existing technology is that the vibrating screen of the existing screening machine is not stable enough during operation, and is prone to leakage during material transportation, affecting the screening efficiency; it can usually only move on the ground or on rails, has a single function, and is inconvenient to construct. Summary of the Invention

[0006] The purpose of the utility model is to provide a screening machine with the advantages of simple construction, stable operation and high working efficiency in view of the problems existing in the prior art.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a screening machine, including a mobile base, the mobile base includes a supporting platform and walking crawler wheels arranged on the left and right sides of the supporting platform, an excavation mechanism is rotatably arranged on the supporting platform, a mobile conversion mechanism is arranged on the front and rear sides of the supporting platform, rail wheels are arranged on the mobile conversion mechanism, an engine connected to the rail wheels is arranged on the mobile conversion mechanism, a connecting mechanism is provided on the supporting platform, a vibrating screen is provided on the connecting mechanism, a coarse material outlet and a fine material outlet are provided on the vibrating screen, a rotating component is provided on the connecting mechanism, and a transverse conveyor belt for conveying fine material outlet material is provided on the top of the rotating component.

[0008] In the above scheme, the support platform of the mobile base is used to support the upper components, the walking track wheels are used for walking on the road, the excavation mechanism is used to move the soil and rocks on the road to the vibrating screen for screening, and the mobile conversion mechanism is used to lower the rail wheels when the screening machine needs to be moved to the rails. The rail wheels cooperate with the rails to support and drive the screening machine. The engine is used to drive the rail wheels to rotate. The rear side of the support platform supports the vibrating screen through the connecting mechanism. After screening by the vibrating screen, the coarse material in the material is discharged from the coarse material outlet, and the fine material is discharged from the fine material outlet. The end of the transverse conveyor belt connected to the rotating component is used to receive the fine material.

[0009] Furthermore, the connecting mechanism includes a connecting base, which is connected to the supporting platform. A supporting frame is provided on the top of the connecting base, and a transverse conveyor belt 2 is provided at the lower part of the supporting frame. The transverse conveyor belt 2 is located directly below the fine material outlet, and the end positions of the transverse conveyor belt 1 and the transverse conveyor belt 2 correspond.

[0010] The base is connected to the support platform to support the support frame, the support frame is used to position the second transverse conveyor belt, and the second transverse conveyor belt is used to move the fine material laterally to a place on the transverse conveyor belt, making material transportation convenient.

[0011] Furthermore, an outer cover shell is provided at the end of the second transverse conveyor belt, and a downward-opening blanking port is formed between the outer cover shell and the second transverse conveyor belt. The end positions of the first transverse conveyor belt and the second transverse conveyor belt are correspondingly located directly below the blanking port.

[0012] By setting up an outer cover shell, the material on the transverse conveyor belt 2 is discharged from the drop port to the transverse conveyor belt 1. The transverse conveyor belts 1 and 2 are located directly below the drop port, so that when the transverse conveyor belt 1 rotates, the material coming down from the transverse conveyor belt 2 falls onto the transverse conveyor belt 1, thereby avoiding material spillage and improving conveying efficiency.

[0013] Furthermore, the vibrating screen includes a fixed hopper and a screen assembly located above the fixed hopper. A collecting hopper is provided on the connecting mechanism. The hopper inlet of the collecting hopper corresponds to the coarse material outlet position of the screen assembly. A hopper outlet is provided at the bottom of the collecting hopper.

[0014] A vibrator is set on the screen assembly to drive the screen assembly to vibrate, thereby screening the material. The fine material is discharged from the fine material outlet at the bottom of the fixed hopper, and the coarse material is discharged downward from the inclined mesh surface of the screen assembly, falls into the collecting hopper through the coarse material outlet, and is discharged from the hopper outlet.

[0015] The position of the hopper outlet can be adjusted according to the material requirements of the track center and the pillow shoulder to make it more in line with the material requirements of the construction site.

[0016] Furthermore, the mobile conversion mechanism includes a main frame, the main frame is rotatably connected to the support platform, a hydraulic cylinder is rotatably connected to the main frame, and the hydraulic cylinder is rotatably connected to the support platform.

[0017] The main frame is rotatably connected to the supporting platform, and the main frame is driven to swing up and down by the extension and contraction of the hydraulic cylinder to realize the retraction and lowering of the rail wheels.

[0018] Furthermore, rail wheels are rotatably provided on both sides of the main frame, and protective plates corresponding to the positions of the rail wheels are provided on the main frame.

[0019] Rail wheels are arranged on both sides of the main frame to be connected to the rails, and protective plates are arranged to protect the rail wheels.

[0020] Furthermore, the mobile conversion mechanism includes a mounting plate, a push shovel is rotatably provided on the mounting plate, a limiting portion for cooperating with the rear side of the push shovel is provided on the mounting plate, and a detachable connecting mechanism is provided between the push shovel and the mounting plate.

[0021] A push shovel is installed on the mounting plate to push away impurities in front of the mobile base and evenly push away fallen materials. When the push shovel is working, a limiter supports the rear side of the push shovel. When not working, the push shovel can be folded. The push shovel and the mounting plate are connected by a detachable connection mechanism. The push shovel below the hopper can be used to evenly push away ballast that has fallen to the center of the track.

[0022] Furthermore, the excavation mechanism includes a driving platform, a mechanical arm is provided on the driving platform, and the mechanical arm is connected to a bucket.

[0023] The driving platform is used for driver operation, and the driver controls the bucket to move materials through the mechanical arm.

[0024] Furthermore, an anti-blocking device is provided at the upper end of the screen assembly, and the anti-blocking device includes a fixed beam, and a plurality of vertical rods are equidistantly provided at the bottom of the fixed beam, and the bottom ends of the vertical rods are located on the upper side of the screen of the screen assembly.

[0025] The vertical rod blocks large-sized materials to avoid material blockage.

[0026] Furthermore, in the recovery state, the transverse conveyor belt stops in the gap between the walking track wheel and the driving platform.

[0027] In the retracted state, the transverse conveyor belt stops in the gap between the crawler wheel and the driving platform, and maintains a safe distance from the driving platform and crawler belt. The overall width is small, avoiding exceeding the railway limit and having good applicability.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. By setting the walking track wheels on the mobile base and connecting the rail wheels through the mobile conversion mechanism, normal operation can be achieved in both road and rail working conditions, which is convenient for construction;

[0030] 2. The vibrating screen is supported by a connecting mechanism to ensure the stability of the connection between the fixed hopper and the mobile base of the vibrating screen; protective plates are provided to protect the rail wheels, and a push shovel is provided to clear obstacles in front of the mobile base to ensure stable operation of the screening machine;

[0031] 3. The fine materials screened by the vibrating screen are transferred in time through the cooperation of transverse conveyor belt 1 and transverse conveyor belt 2, and the outer cover is used to prevent the materials from spilling and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural perspective view of a screening machine according to Example 1 of the present utility model;

[0033] Figure 2 This is a structural front view of a screening machine according to Example 1 of the present utility model;

[0034] Figure 3 This is a structural cross-sectional view of the vibrating screen in Example 1 of the present utility model;

[0035] Figure 4 This is a structural perspective view of the second transverse conveyor belt in Example 1 of the present utility model;

[0036] Figure 5 This is a cross-sectional view of the structure of the push shovel in Example 1 of the present utility model;

[0037] In the figure: 1. Support platform; 2. Walking track wheel; 3. Rail wheel; 4. Coarse material outlet; 5. Fine material outlet; 6. Rotating parts; 7. Horizontal conveyor belt 1; 8. Connecting base; 9. Support frame; 10. Horizontal conveyor belt 2; 11. Outer cover; 12. Dropping port; 13. Screen assembly; 14. Fixed hopper; 15. Collecting hopper; 16. Hopper inlet; 17. Hopper outlet; 18. Main frame; 19. Hydraulic cylinder; 20. Protective plate; 21. Mounting plate; 22. Push shovel; 23. Limiting part; 24. Driving platform; 25. Mechanical arm; 26. Bucket; 27. Connecting ear plate; 28. Fixed beam; 29. ​​Vertical rod. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solution of the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, it should be noted that the terms front, back, left, right, etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed or operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Example 1

[0039] like Figure 1-5 As shown, a screening machine includes a mobile base, the mobile base includes a support platform 1 and walking crawler wheels 2 arranged on the left and right sides of the support platform 1, the upper rotation of the support platform 1 is provided with an excavation mechanism, the front and rear sides of the support platform 1 are provided with a mobile conversion mechanism, the mobile conversion mechanism is provided with rail wheels 3, the mobile conversion mechanism is provided with an engine connected to the rail wheels 3, the rear side of the support platform 1 is provided with a connecting mechanism, the connecting mechanism is provided with a vibrating screen, the vibrating screen is provided with a coarse material outlet 4 and a fine material outlet 5, the connecting mechanism is provided with a rotating component 6, and the top of the rotating component 6 is provided with a transverse conveyor belt 7 for conveying materials to the fine material outlet 5.

[0040] In the above scheme, the support platform 1 of the mobile base is used to support the upper components, the walking track wheels 2 are used for walking on the road, the excavation mechanism is used to move the soil and rocks on the road to the vibrating screen for screening, and the mobile conversion mechanism is used to lower the rail wheels 3 when the screening machine needs to be moved to the rails. The rail wheels 3 cooperate with the rails to support and drive the screening machine. The engine is used to drive the rail wheels 3 to rotate. The rear side of the support platform 1 supports the vibrating screen through the connecting mechanism. After screening by the vibrating screen, the coarse material in the material is discharged from the coarse material outlet 4, and the fine material is discharged from the fine material outlet 5. The end of the transverse conveyor belt 7 connected to the rotating component 6 is used to receive the fine material.

[0041] The rotating component 6 may include a hydraulic rotating mechanism or a rotating motor, and the discharging direction of the transverse conveyor belt 7 is controlled by the rotating component 6.

[0042] Furthermore, the connecting mechanism includes a connecting base 8, which is connected to the supporting platform 1. A supporting frame 9 is provided on the top of the connecting base 8, and a transverse conveyor belt 2 10 is provided at the lower part of the supporting frame 9. The transverse conveyor belt 2 10 is located directly below the fine material outlet 5, and the transverse conveyor belt 1 7 corresponds to the end position of the transverse conveyor belt 2 10.

[0043] The connecting base 8 is connected to the supporting platform 1 to support the supporting frame 9, and the transverse conveyor belt 2 10 is positioned through the supporting frame 9. The transverse conveyor belt 2 10 is used to move the fine material laterally to the transverse conveyor belt 1 7, making material transportation convenient.

[0044] Connecting plates are provided between the two ends of the connecting base 8 and the frame of the traveling track wheel 2 to enhance the structural stability of the connecting base 8 .

[0045] Furthermore, an outer cover shell 11 is provided at the end of the transverse conveyor belt 2 10, and a downward-opening blanking port 12 is formed between the outer cover shell 11 and the transverse conveyor belt 2 10. The end positions of the transverse conveyor belt 1 7 and the transverse conveyor belt 2 10 are correspondingly located directly below the blanking port 12.

[0046] By providing the outer cover shell 11, the material on the transverse conveyor belt 2 10 is discharged from the drop port 12 to the transverse conveyor belt 1 7, thereby preventing the material from spilling and improving the conveying efficiency.

[0047] A rotating component 6 and a transverse conveyor belt 1 7 are respectively provided at both ends of the connecting base 8. The two ends of the transverse conveyor belt 2 10 correspond to a transverse conveyor belt 1 7 respectively. The material can be discharged to both sides of the movable base by controlling the conveying direction of the transverse conveyor belt 2 10.

[0048] Furthermore, the vibrating screen includes a fixed hopper 14 and a screen assembly 13 located above the fixed hopper 14. A collecting hopper 15 is provided on the connecting mechanism. The hopper inlet 16 of the collecting hopper 15 corresponds to the coarse material outlet 4 of the screen assembly 13. A hopper outlet 17 is provided at the bottom of the collecting hopper 15.

[0049] A vibrator is provided on the screen assembly 13 to drive the screen assembly 13 to vibrate, thereby screening the material. The fine material is discharged from the fine material outlet 5 at the bottom of the fixed hopper 14, and the coarse material is discharged downward from the inclined mesh surface of the screen assembly 13, falls into the collecting hopper 15 through the coarse material outlet 4, and is discharged from the hopper outlet 17 in a centralized manner.

[0050] The upper part of the collecting hopper 15 is a conical bucket structure, and the lower part of the collecting hopper 15 is provided with two left and right hopper outlets 17. The position of the hopper outlet 17 can be adjusted according to the material requirements of the track center and the pillow shoulder to make it more in line with the material requirements of the construction site.

[0051] Furthermore, the mobile conversion mechanism includes a main frame 18, which is rotatably connected to the support platform 1. A hydraulic cylinder 19 is rotatably connected to the main frame 18 and is rotatably connected to the support platform 1. A hopper outlet 17 is also provided in the middle of the hopper 15 to fill the material into the center of the railway track. A dozer 22 below the hopper 15 can be used to evenly push and flatten the falling ballast.

[0052] The main frame 18 is rotatably connected to the support platform 1 , and the main frame 18 is driven to swing up and down by the extension and contraction of the hydraulic cylinder 19 , thereby realizing the retraction and lowering of the rail wheels 3 .

[0053] Furthermore, rail wheels 3 are rotatably provided on both sides of the main frame 18 , and protective plates 20 corresponding to the positions of the rail wheels 3 are provided on the main frame 18 .

[0054] Rail wheels 3 are provided on both sides of the main frame 18 to be connected to the rails, and protective plates 20 are provided to protect the rail wheels 3.

[0055] The protective plate 20 comprises an upper steel plate and a lower rubber plate, and the rubber plate cooperates with the rails to clear stones on the upper part.

[0056] Furthermore, the mobile conversion mechanism includes a mounting plate 21, on which a push shovel 22 is rotatably provided. The mounting plate 21 is provided with a limiting portion 23 for cooperating with the rear side of the push shovel 22, and a detachable connection mechanism is provided between the push shovel 22 and the mounting plate 21.

[0057] A pushing shovel 22 is provided on the mounting plate 21 to push away impurities in front of the movable base. When the pushing shovel 22 is working, the rear side of the pushing shovel 22 is supported and limited by the limiting portion 23. When not in working state, the pushing shovel 22 can be folded. The pushing shovel 22 and the mounting plate 21 are connected by a detachable connecting mechanism.

[0058] The detachable connecting mechanism includes connecting lugs provided on the dozer blade 22 and the mounting plate 21, and the connecting lugs can be connected by a lock. The main frame 18 of the mobile conversion mechanism is provided with an engine to drive the rail wheels 3 to rotate. The limiting portion 23 includes a limiting rod.

[0059] Furthermore, the excavation mechanism includes a driving platform 24 , a mechanical arm 25 is provided on the driving platform 24 , and the mechanical arm 25 is connected to a bucket 26 .

[0060] The driving platform 24 is used for the driver to operate, and the driver controls the bucket 26 to move materials through the mechanical arm 25.

[0061] Furthermore, an anti-blocking device is provided at the upper end of the screen assembly 13, and the anti-blocking device includes a fixed beam 28. A plurality of vertical rods 29 are equidistantly provided at the bottom of the fixed beam 28, and the bottom ends of the vertical rods 29 are located on the upper side of the screen of the screen assembly 13.

[0062] The vertical rod 29 blocks large-sized materials to avoid material blockage.

[0063] Furthermore, in the recovery state, the transverse conveyor belt 7 stops in the gap between the walking track wheel 2 and the driving platform 24.

[0064] There are two transverse conveyor belts 7, which are symmetrically arranged on the left and right sides of the screening machine. In the recovery state, the transverse conveyor belt 7 stops in the gap between the crawler and the driving platform 24. The transverse conveyor belt 7 is located directly above the walking crawler wheel 2, and maintains a safe distance from the driving platform 24 and the crawler above and below. The overall width is small to avoid exceeding the railway limit and has good applicability. In the recovery position, the support platform 1 is provided with mechanical limit and electronic switch limit. After reaching the limit, it cannot rotate inward. The conveyor can rotate at an angle of 0-185°. According to whether the waste soil is bagged or discarded outside the line, the working position of the transverse conveyor belt 7 on the corresponding side is adjusted. At the same time, according to the position of the obstacle outside the line, the throwing position of the transverse conveyor belt 7 can be dynamically adjusted. The limit position of the rotation is controlled by a travel switch to prevent collision with other parts.

[0065] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screening machine, characterized in that: The mobile base includes a supporting platform and crawler wheels arranged on the left and right sides of the supporting platform, an excavation mechanism is rotatably arranged on the supporting platform, a mobile conversion mechanism is arranged on the front and rear sides of the supporting platform, rail wheels are arranged on the mobile conversion mechanism, an engine connected to the rail wheels is arranged on the mobile conversion mechanism, a connecting mechanism is arranged on the supporting platform, a vibrating screen is arranged on the connecting mechanism, a coarse material outlet and a fine material outlet are arranged on the vibrating screen, a rotating component is arranged on the connecting mechanism, and a transverse conveyor belt for conveying fine material outlet material is arranged on the top of the rotating component.

2. The screening machine according to claim 1, characterized in that: The connecting mechanism includes a connecting base, which is connected to the supporting platform. A supporting frame is provided on the top of the connecting base. A second transverse conveyor belt is provided at the lower part of the supporting frame. The second transverse conveyor belt is located directly below the fine material outlet, and the end positions of the first transverse conveyor belt and the second transverse conveyor belt correspond.

3. The screening machine according to claim 2, characterized in that: An outer cover shell is provided at the end of the second transverse conveyor belt, and a downward-opening blanking port is formed between the outer cover shell and the second transverse conveyor belt. The end positions of the first transverse conveyor belt and the second transverse conveyor belt are correspondingly located directly below the blanking port.

4. The screening machine according to claim 1, characterized in that: The vibrating screen includes a fixed hopper and a screen assembly located above the fixed hopper. A collecting hopper is provided on the connecting mechanism. The hopper inlet of the collecting hopper corresponds to the coarse material outlet position of the screen assembly. A hopper outlet is provided at the bottom of the collecting hopper.

5. The screening machine according to claim 1, characterized in that: The mobile conversion mechanism includes a main frame, the main frame is rotatably connected to the support platform, the main frame is rotatably connected to a hydraulic cylinder, and the hydraulic cylinder is rotatably connected to the support platform.

6. The screening machine according to claim 5, characterized in that Rail wheels are rotatably arranged on both sides of the main frame, and protective plates corresponding to the positions of the rail wheels are arranged on the main frame.

7. The screening machine according to claim 1, characterized in that The mobile conversion mechanism includes a mounting plate, a push shovel is rotatably mounted on the mounting plate, a limiting portion for cooperating with the rear side of the push shovel is provided on the mounting plate, and a detachable connection mechanism is provided between the push shovel and the mounting plate.

8. The screening machine according to claim 1, characterized in that: The excavation mechanism includes a driving platform, a mechanical arm is arranged on the driving platform, and the mechanical arm is connected to a bucket.

9. The screening machine according to claim 4, characterized in that: An anti-blocking device is provided at the upper end of the screen assembly, and the anti-blocking device includes a fixed beam. A plurality of vertical rods are equidistantly provided at the bottom of the fixed beam, and the bottom ends of the vertical rods are located on the upper side of the screen of the screen assembly.

10. The screening machine according to claim 1, characterized in that In the recovery state, the transverse conveyor belt stops in the gap between the walking track wheel and the driving platform.

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