CN112391992A - Track cleaning device for urban rail transit - Google Patents
Track cleaning device for urban rail transit Download PDFInfo
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- CN112391992A CN112391992A CN202011245680.5A CN202011245680A CN112391992A CN 112391992 A CN112391992 A CN 112391992A CN 202011245680 A CN202011245680 A CN 202011245680A CN 112391992 A CN112391992 A CN 112391992A
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- pulley
- box
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- 238000004140 cleaning Methods 0.000 title claims abstract description 115
- 239000000428 dust Substances 0.000 claims abstract description 87
- 238000010521 absorption reaction Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 239000012459 cleaning agent Substances 0.000 claims description 31
- 238000003756 stirring Methods 0.000 claims description 26
- 238000001514 detection method Methods 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 2
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000004677 Nylon Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 229920001778 nylon Polymers 0.000 abstract description 3
- 239000003599 detergent Substances 0.000 description 14
- 238000002955 isolation Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000012548 In-process support Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H8/00—Removing undesirable matter from the permanent way of railways; Removing undesirable matter from tramway rails
- E01H8/10—Removing undesirable matter from rails, flange grooves, or the like railway parts, e.g. removing ice from contact rails, removing mud from flange grooves
- E01H8/105—Pneumatically or hydraulically loosening, removing or dislodging undesirable matter, e.g. removing by blowing, flushing, suction; Application of melting liquids; Loosening or removing by means of heat, e.g. cleaning by plasma torches, drying by burners
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
- B01F27/75—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/82—Combinations of dissimilar mixers
- B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H8/00—Removing undesirable matter from the permanent way of railways; Removing undesirable matter from tramway rails
- E01H8/10—Removing undesirable matter from rails, flange grooves, or the like railway parts, e.g. removing ice from contact rails, removing mud from flange grooves
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a rail cleaning device for urban rail transit, which comprises a rail and an air pump, wherein a support frame is arranged above the rail, a fixing frame is arranged above the support frame, and a dust absorption pipeline is arranged above the fixing frame. The cleaning device is provided with the first motor, the first motor is electrified to work to drive the cleaning roller to rotate at a high speed, and the cleaning roller surrounds the track, so that three surfaces of the track are cleaned, the cleaning efficiency of the cleaning device on the track is greatly improved, and meanwhile, the bristles are made of nylon materials and have strong wear resistance, so that the service life of the cleaning device is prolonged, and the cleaning weight is improved; cleaning in-process air pump work, will clean the dust that produces in the dust proof box and inhale the dust bag and collect, avoid the dust that produces to fly away to cause the pollution to the air in, dust absorption pipeline passes through threaded connection with the dust bag simultaneously to in dismantling the clearance to the dust bag.
Description
Technical Field
The invention relates to the technical field of rail cleaning, in particular to a rail cleaning device for urban rail transit.
Background
Urban rail transit is a vehicle transportation system which adopts a rail structure to carry out bearing and guiding, a fully-closed or partially-closed special rail line is arranged according to the requirement of the overall planning of urban traffic, a public transportation mode for transporting a considerable amount of passenger flow in a train or bicycle form, a subway system, a light rail system, a monorail system, a tramcar, a magnetic levitation system, an automatic guiding rail system and an urban area rapid rail system are adopted, but the rail for urban rail transit is exposed all the year round, and the upper end of the rail adsorbs a large amount of dust, thereby bringing great influence on the use and safety of the rail.
The cleaning of the existing urban rail transit is carried out manually, the cleaning work is heavy, the labor burden is large, time and labor are wasted, and technical innovation is carried out on the basis of the existing urban rail transit rail cleaning device aiming at the conditions.
Disclosure of Invention
The invention aims to provide a rail cleaning device for urban rail transit, which aims to solve the problems that the existing cleaning for urban rail transit is carried out manually, the cleaning work is heavy, the labor burden is large, and time and labor are wasted in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a track cleaning device for urban rail transit, includes track and aspiration pump, the support frame is installed to orbital top, and installs the mount in the top of support frame, the dust absorption pipeline is installed to the top of mount, the motor protecting box is installed to the upper end of support frame, and the internally mounted of motor protecting box has first motor, first motor belt pulley is installed to the front end of first motor, and the right-hand member of first motor belt pulley is connected with first belt, and the right-hand member of first belt connects the transmission shaft belt pulley.
Preferably, the transmission shaft is installed to the rear end of transmission shaft belt pulley, and the rear end of transmission shaft installs and cleans the gyro wheel, the surface mounting who cleans the gyro wheel has the brush hair, first motor through first motor belt pulley, first belt, transmission shaft and transmission shaft belt pulley and clean and constitute belt drive between the gyro wheel, and the brush hair is evenly distributed along the outward appearance of cleaning the gyro wheel to be welded connection between support frame and the motor guard box, the inside that cleans the gyro wheel simultaneously is identical with the track shape.
Preferably, the dust-proof box is installed to the one end of dust absorption pipeline, the internally mounted of dust absorption pipeline has the aspiration pump, the collecting box is installed on the right side of dust absorption pipeline, and the internally mounted of collecting box has the dust bag, the hinge is installed to the front end of collecting box, and the left end of hinge installs the chamber door, the dust-proof box passes through to constitute the connectivity structure between dust absorption pipeline and the dust bag, and is threaded connection between dust absorption pipeline and the aspiration pump to be welded connection between dust-proof box and the dust absorption pipeline, be threaded connection between dust absorption pipeline and the dust bag simultaneously.
Preferably, the second motor is installed on the right side of the dust collecting bag, a second motor belt pulley is installed at the front end of the second motor, a second belt is connected to the lower end of the second motor belt pulley, a roller belt pulley is connected to the lower end of the second belt, a roller is installed at the front end of the roller belt pulley, the second motor is in belt transmission through the second motor belt pulley, the second belt, the roller belt pulley and the roller, and the second motor is in threaded connection with the collecting box.
Preferably, the box door and the collecting box form a rotating structure through a hinge, and a sealing structure is formed between the box door and the collecting box.
Preferably, the support frame is connected with the fixing frame in a welding mode, and the dust collection pipeline penetrates through the inside of the support frame.
Preferably, the support frame and the left side of the motor protection box are also fixedly connected with a track cleaning device, the track cleaning device comprises an upper shell and a lower shell, and the upper shell and the lower shell are fixedly connected;
the upper case includes: the cleaning device comprises a water tank, a third motor, a fourth motor and a cleaning agent box body, wherein a mounting seat is fixed on the right side box body in an upper shell, the fourth motor is arranged on the mounting seat, a rotating disc is arranged on the front side of the fourth motor, the rotating disc is hinged with a connecting rod III, the connecting rod II and the connecting rod III are hinged to a sliding block I together, and a sliding groove I is formed in the top of the cleaning agent box body;
the cleaning agent box body is arranged on the right bottom wall in the upper shell, the water tank is arranged on the left bottom wall in the upper shell, a third motor is fixedly arranged at the bottom end of a first sliding groove, the third motor is fixedly connected with a first rotating shaft in the cleaning agent box body after penetrating through the cleaning agent box body, the first rotating shaft is fixedly connected with a first strip-shaped plate, a cleaning agent inlet is further formed in the top end of the cleaning agent box body, a first connecting pipe is arranged between the cleaning agent box body and the water tank, a second reverse-flow valve is arranged on the first connecting pipe, one end of a first spring is fixedly connected to the bottom end of the water tank, the other end of the first spring is fixed to the lower end of a squeezing plate, the upper end of the squeezing plate is fixedly connected with the bottom end of the first connecting rod, the top end of the first connecting rod is hinged to the, the tail end of the second connecting pipe is connected with the stirring unit through the lower shell;
the stirring unit includes: the stirring chamber is arranged at the left part of the lower shell, the stirring chamber is communicated with the tail end of the connecting pipe, the fixing plate is fixed on the upper side and the lower side of the rotating shaft II, a second sliding groove is formed in the fixing plate, a second sliding block is arranged at the left end of the fixing plate in a sliding mode, one end of a push-pull rod is fixed in the slider II, a clamping sleeve is connected to the middle section of the push-pull rod in a sliding mode, a second spring is fixedly connected to the other end of the push-pull rod, the other end of the second spring is fixed on the rotating shaft II, the right end of the clamping sleeve is fixed on the fixing plate, a third rotating shaft is arranged at the right end of the slider II in a rotating mode, and a rotating bearing matched with the three phases of the rotating shaft is arranged on the slider II, the second strip-shaped plates are symmetrically and fixedly arranged on the upper side and the lower side of the third rotating shaft and are distributed at intervals with the second strip-shaped plates arranged on the second rotating shaft;
the right end of the second rotating shaft penetrates through the gear box to be connected with the first bevel gear, the second rotating shaft is rotatably connected with the gear box, the first bevel gear is meshed with the second bevel gear, the lower end of the second bevel gear penetrates through the gear box to be fixedly connected with the fourth rotating shaft, the fourth rotating shaft penetrates through the cleaning chamber and is fixed with the cleaning brush, the fourth rotating shaft is rotatably connected with the cleaning chamber, the cleaning brush is tightly attached to the track, the electric telescopic rod is installed at the lower bottom of the right side of the lower shell stirring unit, an isolation plate is fixedly connected to the lower portion of the electric telescopic rod, the lower portion of the isolation plate penetrates through the drainage tube to extend to the bottom of the drainage tube, the left end of the drainage tube is communicated.
Preferably, the track cleaning device for urban rail transit is characterized by further comprising:
the tension sensor is arranged in the motor protection box and used for detecting tension applied to the first belt;
the first rotating speed sensor and the second rotating speed sensor are respectively arranged on the first motor belt pulley and the transmission shaft belt pulley and are respectively used for detecting the circumferential rotating speeds of the first motor belt pulley and the transmission shaft belt pulley;
the speed sensor is arranged on the first belt and used for detecting the moving speed of the first belt;
the controller is arranged on the motor protection box and is electrically connected with the first rotating speed sensor, the second rotating speed sensor, the speed sensor and the tension sensor, and the controller controls the first motor to work based on the first rotating speed sensor, the second rotating speed sensor, the speed sensor and the tension sensor, and the method comprises the following steps:
step 1: according to the detection values of the tension sensor and the speed sensor and the formula (1), the slip ratio of the first belt transmission can be calculated:
wherein ω ishIs the transmission slip ratio of the first belt, C is the area of the cross section of the first belt, v is the moving speed of the first belt detected by the speed sensor, FdThe current tension of the first belt detected by the tension sensor, E is the elastic modulus of the first belt, E is a natural constant and takes a value of 2.72, m is the weight of the first belt, and f is1Is the coefficient of friction between the first belt and the first motor pulley, f2The friction coefficient between the first belt and the transmission shaft belt pulley is shown, alpha is an included angle between a connecting line of central points of the first motor belt pulley and the transmission shaft belt pulley and the first belt, sin is sine, and lg is a logarithm with 10 as a base;
step 2: and (3) calculating the actual transmission efficiency of the first belt according to the formula (2) and the detection values of the first rotating speed sensor and the second rotating speed sensor:
where eta is the actual transmission efficiency of said first belt, FcIs the initial tension, V, of the first belt1The rotation speed, V, of the first motor pulley detected by the first rotation speed sensor2The rotation speed P of the transmission shaft pulley detected by the second rotation speed sensorHFor the first belt drive process the bearing friction power loss, P, of the first motor1For the rated friction power loss, P, of the first motor pulley2For rated frictional power loss, R, of the pulley of the propeller shaft1Is the radius, R, of the first motor pulley2Is the radius of the drive shaft pulley.
Compared with the prior art, the invention has the following beneficial effects:
1. the cleaning device is provided with the first motor, the first motor is electrified to work to drive the cleaning roller to rotate at a high speed, and the cleaning roller surrounds the track, so that three surfaces of the track are cleaned, the cleaning efficiency of the cleaning device on the track is greatly improved, and meanwhile, the bristles are made of nylon materials and have strong wear resistance, so that the service life of the cleaning device is prolonged, and the cleaning weight is improved;
2. the suction pump is arranged in the dust collection pipeline, the suction pump works in the cleaning process, dust generated by cleaning in the dust prevention box is sucked into the dust collection bag for collection, the generated dust is prevented from flying into the air to pollute the air, the generated dust is prevented from being adsorbed on a cleaned track again to influence the cleaning weight of the device, and meanwhile, the dust collection pipeline is connected with the dust collection bag through threads so as to be convenient for disassembling and cleaning the dust collection bag;
3. the device is provided with the second motor, the second motor is electrified to work to drive the roller to rotate on the rail, so that the device moves on the rail, the rail is cleaned while the device moves on the rail, and the cleaning efficiency of the device on the rail is greatly improved;
4. the dust collecting box is provided with the box door, so that the collecting box can be conveniently opened to process a dust collecting bag in the dust collecting box, and parts in the collecting box can be conveniently overhauled and cleaned, so that the service life of the device is prolonged, and meanwhile, the box door and the collecting box play a role in protecting the parts in the collecting box, so that dust is prevented from entering and damaging the internal parts of the device; the mount plays the fixed action to support frame and collecting box, improves the device's steadiness, avoids cleaning the in-process support frame and rocks, causes the track cleaning portion clean.
5. The water tank cleaning device is provided with the water tank and the cleaning agent tank body, the fourth motor is electrified to work to drive the rotating disc to rotate to drive the connecting rod III to rotate, so that the sliding block I moves left and right in the sliding groove I, the connecting rod II and the connecting rod I are driven to move, the extrusion plate moves up and down to enable water and cleaning agent in the water tank to flow into the stirring unit through the connecting pipe, the mixing efficiency of the device on the adding proportion of the water and the cleaning agent is increased, the labor intensity of workers for carrying the water and the cleaning agent is reduced, and the mixed liquid achieves the best cleaning effect.
6. The lower shell of the cleaning machine is internally provided with the stirring unit and the cleaning brush, the fifth motor is electrified and rotated, so that the second rotating shaft drives the two strip-shaped plates on the third rotating shaft which is vertically arranged to rotate at intervals, water and a cleaning agent are fully stirred, then the water and the cleaning agent flow onto the cleaning brush in the cleaning chamber through the drainage pipe, and the track is fully cleaned under the condition that the cleaning brush rotates, so that the pollution of residual dust in a dust collecting process to air is reduced, the secondary cleaning of the track is realized, and the cleaning efficiency is greatly improved.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic view of the internal structure of the stand according to the present invention;
FIG. 3 is a schematic view of the sweeping roller according to the present invention;
FIG. 4 is a schematic view of the internal structure of the collection box of the present invention;
FIG. 5 is a schematic view showing the internal structure of the dust suction duct according to the present invention;
fig. 6 is a schematic view of the internal structure of the track cleaning device of the present invention.
In the figure: 1. a track; 2. a support frame; 3. a motor protection box; 4. a fixed mount; 5. a dust collection duct; 6. a collection box; 7. a box door; 8. a roller; 9. a first motor; 10. a first motor pulley; 11. a first belt; 12. a dust-proof box; 13. cleaning the roller; 14. a drive shaft; 15. a transmission shaft pulley; 16. brushing; 17. a hinge; 18. a dust collection bag; 19. a second motor; 20. a second motor pulley; 21. a second belt; 22. a roller pulley; 23. an air pump; 24. a first connecting pipe; 25. a first reflux valve; 251. a second reflux valve; 26. a first spring; 261. a second spring; 27. a pressing plate; 28. a water tank; 29. a first connecting rod; 30. a second connecting rod; 31. a third connecting rod; 32. a third motor; 33. rotating the disc; 34. a mounting seat; 35. a detergent input port; 36. a first sliding block; 37. a first sliding chute; 371. a second chute; 38. a detergent box body; 39. a fourth motor; 40. a strip-shaped plate I; 401. a strip-shaped plate II; 41. an upper housing; 42. a lower housing; 43. a second connecting pipe; 44. a first rotating shaft; 441. a second rotating shaft; 45. a baffle plate; 46. a second sliding block; 47. a fifth motor; 48. a push-pull rod; 49. a card sleeve; 50. a fixing plate; 51. a third rotating shaft; 52. a first bevel gear; 53. a gear case; 54. a second bevel gear; 55. an electric telescopic rod; 551. a separator plate; 56. a fourth rotating shaft; 57. a cleaning brush; 58. a cleaning chamber; 59. a drainage tube; 60 a stirring chamber.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: the utility model provides a track cleaning device for urban rail transit, including track 1 and aspiration pump 23, support frame 2 is installed to track 1's top, and support frame 2's top installs mount 4, dust absorption pipeline 5 is installed to mount 4's top, motor protecting box 3 is installed to support frame 2's upper end, and the internally mounted of motor protecting box 3 has first motor 9, first motor pulley 10 is installed to the front end of first motor 9, and the right-hand member of first motor pulley 10 is connected with first belt 11, and transmission shaft belt pulley 15 is connected to first belt 11's right-hand member.
In the invention: a transmission shaft 14 is arranged at the rear end of the transmission shaft belt pulley 15, a cleaning roller 13 is arranged at the rear end of the transmission shaft 14, bristles 16 are arranged on the outer surface of the cleaning roller 13, the first motor 9 forms belt transmission with the cleaning roller 13 through the first motor belt pulley 10, the first belt 11, the transmission shaft 14, the transmission shaft belt pulley 15 and the cleaning roller 13, the bristles 16 are uniformly distributed along the outer surface of the cleaning roller 13, the support frame 2 is in welded connection with the motor protection box 3, and the inner part of the cleaning roller 13 is matched with the shape of the track 1; the cleaning device is provided with the first motor 9, the first motor 9 is electrified to work to drive the cleaning roller 13 to rotate at a high speed, the cleaning roller 13 surrounds the track 1, so that three surfaces of the track 1 are cleaned, the cleaning efficiency of the cleaning device on the track 1 is greatly improved, and meanwhile, the bristles 16 are made of nylon materials and have strong wear resistance, so that the service life of the cleaning device is prolonged, and the cleaning weight is improved.
In the invention: one end of the dust collection pipeline 5 is provided with a dust box 12, an air suction pump 23 is arranged inside the dust collection pipeline 5, the right side of the dust collection pipeline 5 is provided with a collection box 6, a dust collection bag 18 is arranged inside the collection box 6, the front end of the collection box 6 is provided with a hinge 17, the left end of the hinge 17 is provided with a box door 7, the dust box 12 forms a communication structure with the dust collection bag 18 through the dust collection pipeline 5, the dust collection pipeline 5 is in threaded connection with the air suction pump 23, the dust box 12 is in welded connection with the dust collection pipeline 5, and meanwhile, the dust collection pipeline 5 is in threaded connection with the dust collection bag 18; an air suction pump 23 is arranged inside the dust collection pipeline 5, the air suction pump 23 works in the cleaning process, dust generated by cleaning in the dust prevention box 12 is sucked into the dust collection bag 18 to be collected, the generated dust is prevented from flying into the air to pollute the air, meanwhile, the generated dust is prevented from being adsorbed on the cleaned track 1 again to influence the cleaning weight of the device, and meanwhile, the dust collection pipeline 5 is connected with the dust collection bag 18 through threads so as to be convenient for disassembling and cleaning the dust collection bag 18.
In the invention: a second motor 19 is arranged on the right side of the dust collection bag 18, a second motor belt pulley 20 is arranged at the front end of the second motor 19, a second belt 21 is connected to the lower end of the second motor belt pulley 20, a roller belt pulley 22 is connected to the lower end of the second belt 21, a roller 8 is arranged at the front end of the roller belt pulley 22, the second motor 19 forms belt transmission with the roller 8 through the second motor belt pulley 20, the second belt 21 and the roller belt pulley 22, and the second motor 19 is in threaded connection with the collection box 6; the device is provided with the second motor 19, the second motor 19 is electrified to work to drive the roller 8 to rotate on the track 1, so that the device moves on the track 1, the device can move on the track 1 and clean the track 1 at the same time, and the cleaning efficiency of the device on the track 1 is greatly improved.
In the invention: a rotating structure is formed between the box door 7 and the collecting box 6 through a hinge 17, and a sealing structure is formed between the box door 7 and the collecting box 6; the invention is provided with the box door 7, so that the collecting box 6 can be opened to process the dust bag 18 in the collecting box 6, and the components in the collecting box 6 can be maintained and cleaned, thereby prolonging the service life of the device, and meanwhile, the box door 7 and the collecting box 6 play a role in protecting the components in the collecting box 6, and dust is prevented from entering and damaging the internal components.
In the invention: the supporting frame 2 is welded with the fixing frame 4, and the dust absorption pipeline 5 penetrates through the inside of the supporting frame 2; the mount 4 plays fixed action to support frame 2 and collecting box 6, improves the device's steadiness, avoids cleaning in-process support frame 2 and rocks, causes 1 cleaning of track clean portion totally.
The working principle of the track cleaning device for urban rail transit is as follows: firstly, the second motor 19 is electrified to work and rotate to drive the second motor belt pulley 20 to rotate, the second motor belt pulley 20 drives the roller belt pulley 22 to rotate through the second belt 21, and therefore the roller 8 is driven to rotate on the track 1, and the device moves on the track 1; secondly, a first motor 9 in the motor protection box 3 is electrified to work and rotate to drive a first motor belt pulley 10 to rotate, a transmission shaft belt pulley 15 is driven to rotate through a first belt 11, the transmission shaft belt pulley 15 drives a cleaning roller 13 on a transmission shaft 14 in the support frame 2 fixed by the fixing frame 4 to rotate at a high speed, and bristles 16 are driven to clean the track 1; secondly, the air pump 23 is electrified to work, and dust generated in the dust-proof box 12 is sucked into the dust collection bag 18 through the dust collection pipeline 5; finally, the door 7 is rotated about the hinge 17 to rotate on the collection box 6, so that the collection box 6 is opened and the dust bag 18 is removed for cleaning.
In the invention: the left sides of the support frame 2 and the motor protection box 3 are also fixedly connected with a track cleaning device, the track cleaning device comprises an upper shell 41 and a lower shell 42, and the upper shell 41 is fixedly connected with the lower shell 42;
the upper case 41 includes: the cleaning device comprises a water tank 28, a third motor 32, a fourth motor 39 and a cleaning agent box body 38, wherein a mounting seat 34 is fixed on the right box body in an upper shell 41, the fourth motor 39 is arranged on the mounting seat 34, a rotating disc 33 is arranged on the front side of the fourth motor 39, the rotating disc 33 is hinged to a connecting rod III 31, the connecting rod II 30 and the connecting rod III 31 are hinged to a sliding block I36 together, and a sliding groove I37 is arranged at the top of the cleaning agent box body 38;
the cleaning agent box body 38 is arranged on the right bottom wall in the upper shell body 41, the water tank 28 is arranged on the left bottom wall in the upper shell body 41, the bottom end of the first sliding groove 37 is fixedly provided with the third motor 32, the third motor 32 penetrates through the cleaning agent box body 38 and then is fixedly connected with the first rotating shaft 44 in the cleaning agent box body 38, the first rotating shaft 44 is fixedly connected with the first strip-shaped plate 40, the top end of the cleaning agent box body 38 is further provided with a cleaning agent inlet 35, a first connecting pipe 24 is arranged between the cleaning agent box body 38 and the water tank 28, the first connecting pipe 24 is provided with a second counter-flow valve 251, the bottom end of the water tank 28 is fixedly connected with one end of a first spring 26, the other end of the first spring 26 is fixed at the lower end of the extrusion plate 27, the upper end of the extrusion plate 27 is fixedly connected with the bottom end of the first connecting, a second connecting pipe 43 is arranged at the left end of the water tank 28, a first reflux valve 25 is arranged inside the second connecting pipe 43, and the tail end of the second connecting pipe 43 is connected with the stirring unit through a lower shell 42;
the stirring unit includes: the stirring chamber 60, the fifth motor 47, the second strip-shaped plate 401, the gear box 53 and the cleaning chamber 58 are fixedly arranged on the inner wall of the left end of the lower shell 42, the right end of the fifth motor 47 is fixedly connected with the second rotating shaft 441, the stirring chamber 60 is arranged at the left part of the lower shell 42, the stirring chamber 60 is communicated with the tail end of the second connecting pipe 43, the fixing plate 50 is fixed on the upper side and the lower side of the second rotating shaft 441, the second sliding chute 371 is arranged in the fixing plate 50, the second sliding block 46 is arranged at the left end of the fixing plate 50 in a sliding manner, one end of the push-pull rod 48 is fixed in the second sliding block 46, the middle section of the push-pull rod 48 is connected with the clamping sleeve 49 in a sliding manner, the other end of the push-pull rod 48 is fixedly connected with the second spring 261, the other end of the second spring 261 is fixed on the, the second sliding block 46 is provided with a rotating bearing matched with the third rotating shaft 51, and the second strip-shaped plates 401 are symmetrically and fixedly arranged on the upper side and the lower side of the third rotating shaft 51 and are distributed at intervals with the second strip-shaped plates 401 arranged on the second rotating shaft 441;
the right end of the second rotating shaft 441 penetrates through the gear box 53 to be connected with a first bevel gear 52, the second rotating shaft 441 is rotatably connected with the gear box 53, the first bevel gear 52 is meshed with a second bevel gear 54, the lower end of the second bevel gear 54 penetrates through the gear box 53 to be fixedly connected with a fourth rotating shaft 56, the fourth rotating shaft 56 penetrates through a cleaning chamber 58 and is fixed with a cleaning brush 57, the fourth rotating shaft 56 is rotatably connected with the cleaning chamber 58, the cleaning brush 57 is tightly attached to the track 1, the electric telescopic rod 55 is installed at the lower right bottom of the stirring unit of the lower shell 42, an isolation plate 551 is fixedly connected below the electric telescopic rod 55, the lower portion of the isolation plate 551 penetrates through a drainage tube 59 to extend to the bottom of the drainage tube 59, the left end of the drainage tube 59 is communicated with the stirring chamber 60, and.
The working principle and the beneficial effects of the technical scheme are as follows: firstly, detergent is input into a detergent box body 38 from a detergent input port 35, then a third motor 32 and a fourth motor 39 are started, the fourth motor 39 rotates to drive a rotating disk 33 and a connecting rod three 31 to move, simultaneously, a sliding block I36 connected with the rotating disk is driven to slide left and right in a sliding groove I37, then a connecting rod II 30 connected with the sliding block I36 and a connecting rod I29 hinged with the connecting rod II 30 move to drive a squeezing plate 27 and a spring I26 below to move up and down, when the squeezing plate 27 moves upwards, the detergent stirred by a strip plate I40 flows into a water tank 28 through a reverse flow valve II 251, when the squeezing plate 27 moves downwards, water and the detergent in the water tank 28 flow into a stirring chamber 60 in a lower shell 42 through a reverse flow valve I25 in a connecting pipe II 43, and the water and the detergent precipitate existing in the detergent can be fully stirred by adding the strip plate I40 into the detergent box body 38, the concentration of the detergent is the same, the water and the detergent in the water tank 28 can be mixed according to the optimal proportion, the backflow of liquid can be prevented by arranging the first backflow valve 25 and the second backflow valve 251, the water and the detergent are prevented from being mixed according to the optimal proportion, the mixing efficiency is improved, and the labor intensity of manual mixing operation is reduced.
When water and detergent enter the stirring chamber 60 of the lower shell 42 through the second connecting pipe 43, the fifth motor 47 is started, the fifth motor 47 drives the second rotating shaft 441 to rotate, the fixing plate 50 also rotates along with the rotation of the fixing plate, meanwhile, the second sliding block 46 on the fixing plate 50 intermittently receives the acting force of the baffle 45, further, the second sliding block 46 is driven to slide inwards along the sleeve 49, and then the second spring 261 is matched to realize resetting, so that the second sliding block 46 reciprocates on the fixing plate 50, the third rotating shaft 51 is driven to rotate when the second sliding block 46 reciprocates, the second strip-shaped plate 401 fixed on the third rotating shaft 51 also rotates along with the rotation of the second rotating shaft 441, the first bevel gear 52 and the second bevel gear 54 in the gear box 53 are driven to rotate by the fourth rotating shaft 56, the cleaning brush 57 in the cleaning chamber 58 is driven to rotate, the stirred liquid enters the cleaning chamber 58 through the drainage pipe 59, and is matched with the cleaning brush, when the track 1 does not need to be cleaned, the electric telescopic rod 55 works to enable the isolation plate 551 to move downwards, the drainage tube 59 is blocked from inputting liquid into the cleaning chamber 58, the stirring effect of water and a cleaning agent in the device is greatly improved by arranging the stirring unit, the cleaning force and the cleaning efficiency of the track 1 are improved by arranging the cleaning brush, and secondary cleaning of the track 1 is realized.
In the invention: a track cleaning device for urban rail transit, its characterized in that still includes:
the tension sensor is arranged in the motor protection box 3 and used for detecting tension applied to the first belt 11;
the first rotating speed sensor and the second rotating speed sensor are respectively arranged on the first motor belt pulley 10 and the transmission shaft belt pulley 15 and are respectively used for detecting the circumferential rotating speeds of the first motor belt pulley 10 and the transmission shaft belt pulley 15;
a speed sensor, disposed on the first belt 11, for detecting a moving speed of the first belt 11;
the controller is arranged on the motor protection box 3, the controller is electrically connected with the first rotating speed sensor, the second rotating speed sensor, the speed sensor and the tension sensor, and the controller controls the first motor 9 to work based on the first rotating speed sensor, the second rotating speed sensor, the speed sensor and the tension sensor, and the method comprises the following steps:
step 1: according to the detection values of the tension sensor and the speed sensor and the formula (1), the slip ratio of the transmission of the first belt 11 can be calculated:
wherein ω ishIs the firstA transmission slip ratio of the belt 11, C is an area of a cross section of the first belt 11, v is a moving speed of the first belt 11 detected by the speed sensor, FdThe current tension of the first belt 11 detected by the tension sensor, E is the elastic modulus of the first belt 11, E is a natural constant, and has a value of 2.72, m is the weight of the first belt 11, and f1Is the coefficient of friction between the first belt 11 and the first motor pulley 10, f2The friction coefficient between the first belt 11 and the transmission shaft belt pulley 15 is shown, alpha is an included angle between a connecting line of central points of the first motor belt pulley 10 and the transmission shaft belt pulley 15 and the first belt 11, sin is sine, and lg is a logarithm taking 10 as a base;
step 2: calculating the actual transmission efficiency of the first belt 11 according to the formula (2) and the detection values of the first rotation speed sensor and the second rotation speed sensor:
where eta is the actual transmission efficiency of the first belt 11, FcIs the initial tension, V, of the first belt 111The rotation speed, V, of the first motor pulley 10 detected by the first rotation speed sensor2The rotation speed, P, of the propeller shaft pulley 15 detected by the second rotation speed sensorHFor the purpose of the first belt 11 transmission process the first motor 9 bearing friction power loss, P1For said first motor pulley 10 nominal friction power loss (i.e. power loss of friction between the first motor pulley 10 and the first belt 11), P2Rated for the transmission shaft pulley 15 for frictional power loss (i.e., power loss of friction between the transmission shaft pulley 15 and the first belt 11), R1Is the radius, R, of the first motor pulley 102The radius of the propeller shaft pulley 15.
The beneficial effects of the above technical scheme are: first of all, the effective tension F of the first belt 11 detected by the tension sensordThe moving speed v of the first belt 11 detected by the speed sensor, the first belt 11 and the first motor pulleyCoefficient of friction f between 101Coefficient of friction f between the first belt 11 and the propeller shaft pulley 152An included angle α between a connection line of center points of the first motor pulley 10 and the transmission shaft pulley 15 and the first belt 11 is calculated according to a formula (1) by comprehensively considering the influence of the first belt 11 (the cross section area C, the weight m and the elastic modulus E) and calculating the transmission slip ratio ω of the first belt 11hThe calculation result is more accurate and reliable;
then, the actual transmission efficiency η of the first belt 11 is calculated according to the formula (2), and the rotation speed V of the first motor pulley 10 detected by the first rotation speed sensor is comprehensively considered1The rotation speed V of the propeller shaft pulley 15 detected by the second rotation speed sensor2Radius R of the first motor pulley 101Radius R of the propeller shaft pulley 152And also the nominal friction power loss P of the first motor pulley 101Rated friction power loss P of transmission shaft belt pulley 152The friction power loss P of the bearing of the first motor 9 during the transmission of the first belt 11HAnd the calculation result is more accurate and reliable due to the influence of factors and the like.
The controller controls the first motor 9 to work, and when the actual transmission efficiency of the first belt 11 is smaller than the target transmission efficiency, the controller can control the first motor 9 to increase the rotating speed, so that the moving speed of the first belt 11 is increased, the actual transmission efficiency of the first belt 11 is adjusted, and the requirement of a user on the track cleaning device for urban track traffic is met.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a track cleaning device for urban rail transit, includes track (1) and aspiration pump (23), its characterized in that: support frame (2) are installed to the top of track (1), and mount (4) are installed to the top of support frame (2), dust absorption pipeline (5) are installed to the top of mount (4), motor protecting box (3) are installed to the upper end of support frame (2), and the internally mounted of motor protecting box (3) has first motor (9), first motor pulley (10) are installed to the front end of first motor (9), and the right-hand member of first motor pulley (10) is connected with first belt (11), and transmission shaft pulley (15) are connected to the right-hand member of first belt (11).
2. The track cleaning device for the urban rail transit according to claim 1, characterized in that: transmission shaft (14) are installed to the rear end of transmission shaft belt pulley (15), and the rear end of transmission shaft (14) installs and cleans gyro wheel (13), the surface mounting who cleans gyro wheel (13) has brush hair (16), first motor (9) through first motor pulley (10), first belt (11), transmission shaft (14) and transmission shaft belt pulley (15) and clean and constitute belt drive between gyro wheel (13), and brush hair (16) are personally submitted evenly distributed along the outward appearance that cleans gyro wheel (13) to be welded connection between support frame (2) and motor protecting box (3), the inside that cleans gyro wheel (13) simultaneously is identical with track (1) shape.
3. The track cleaning device for the urban rail transit according to claim 1, characterized in that: dust proof box (12) are installed to the one end of dust absorption pipeline (5), the internally mounted of dust absorption pipeline (5) has aspiration pump (23), collecting box (6) are installed on the right side of dust absorption pipeline (5), and the internally mounted of collecting box (6) has dust bag (18), hinge (17) are installed to the front end of collecting box (6), and the left end of hinge (17) installs chamber door (7), dust proof box (12) constitute the connectivity structure through between dust absorption pipeline (5) and dust bag (18), and be threaded connection between dust absorption pipeline (5) and aspiration pump (23) to be welded connection between dust proof box (12) and dust absorption pipeline (5), be threaded connection between dust absorption pipeline (5) and dust bag (18) simultaneously.
4. The track cleaning device for the urban rail transit according to claim 3, characterized in that: second motor (19) is installed on the right side of dust bag (18), and second motor belt pulley (20) is installed to the front end of second motor (19), the lower extreme of second motor belt pulley (20) is connected with second belt (21), and the lower extreme of second belt (21) is connected with gyro wheel belt pulley (22), and gyro wheel (8) are installed to the front end of gyro wheel belt pulley (22), constitute belt drive between second motor (19) through second motor belt pulley (20), second belt (21) and gyro wheel belt pulley (22) and gyro wheel (8), and be threaded connection between second motor (19) and collecting box (6).
5. The track cleaning device for the urban rail transit according to claim 3, characterized in that: the box door (7) and the collecting box (6) form a rotating structure through the hinge (17), and a sealing structure is formed between the box door (7) and the collecting box (6).
6. The track cleaning device for the urban rail transit according to claim 1, characterized in that: the supporting frame (2) is connected with the fixing frame (4) in a welding mode, and the dust absorption pipeline (5) penetrates through the supporting frame (2).
7. The track cleaning device for the urban rail transit according to claim 1, characterized in that: the track cleaning device is fixedly connected to the left sides of the support frame (2) and the motor protection box (3), and comprises an upper shell (41) and a lower shell (42), and the upper shell (41) is fixedly connected with the lower shell (42);
the upper case (41) includes: the cleaning device comprises a water tank (28), a third motor (32), a fourth motor (39) and a cleaning agent box body (38), wherein a mounting seat (34) is fixed on the right box body in an upper shell (41), the fourth motor (39) is arranged on the mounting seat (34), a rotating disc (33) is arranged on the front side of the fourth motor (39), the rotating disc (33) is hinged to a connecting rod III (31), the connecting rod II (30) and the connecting rod III (31) are hinged to a sliding block I (36) together, and a sliding groove I (37) is arranged at the top of the cleaning agent box body (38);
the cleaning agent box body (38) is installed on the right bottom wall in the upper shell body (41), the water tank (28) is installed on the left bottom wall in the upper shell body (41), the first sliding chute (37) is fixedly provided with the third motor (32) at the bottom end, the third motor (32) penetrates through the cleaning agent box body (38) and is fixedly connected with the first rotating shaft (44) in the cleaning agent box body (38), the first rotating shaft (44) is fixedly connected with the first strip-shaped plate (40), the top end of the cleaning agent box body (38) is further provided with a cleaning agent inlet (35), a first connecting pipe (24) is arranged between the cleaning agent box body (38) and the water tank (28), the first connecting pipe (24) is provided with a second counter-flow valve (251), the bottom end of the water tank (28) is fixedly connected with one end of a first spring (26), and the other end of the first spring (26) is fixed at the lower end of the extrusion, the upper end of the extrusion plate (27) is fixedly connected with the bottom end of a first connecting rod (29), the top end of the first connecting rod (29) is hinged with a second connecting rod (30), a second connecting pipe (43) is arranged at the left end of the water tank (28), a first reflux valve (25) is arranged inside the second connecting pipe (43), and the tail end of the second connecting pipe (43) is connected with the stirring unit through a lower shell (42);
the stirring unit includes: a stirring chamber (60), a fifth motor (47), a second strip-shaped plate (401), a gear box (53) and a cleaning chamber (58), wherein the fifth motor (47) and a baffle (45) are fixedly arranged on the inner wall of the left end of the lower shell (42), the right end of the fifth motor (47) is fixedly connected with a second rotating shaft (441), the stirring chamber (60) is arranged at the left part of the lower shell (42), the stirring chamber (60) is communicated with the tail end of the second connecting pipe (43), the fixing plates (50) are fixed on the upper side and the lower side of the second rotating shaft (441), a second sliding chute (371) is arranged inside the fixing plates (50), a second sliding block (46) is arranged at the left end of the fixing plates (50) in a sliding mode, one end of a push-pull rod (48) is fixed inside the second sliding block (46), the middle section of the push-pull rod (48) is connected with a clamping sleeve (, the other end of the second spring (261) is fixed on the second rotating shaft (441), the right end of the clamping sleeve (49) is fixed on the fixing plate (50), the right end of the second sliding block (46) is rotatably provided with a third rotating shaft (51), the second sliding block (46) is provided with a rotating bearing matched with the third rotating shaft (51), and the second strip-shaped plates (401) are symmetrically and fixedly installed on the upper side and the lower side of the third rotating shaft (51) and are distributed at intervals with the second strip-shaped plates (401) installed on the second rotating shaft (441);
the right end of the second rotating shaft (441) penetrates through a gear box (53) to be connected with a first bevel gear (52), the second rotating shaft (441) is rotatably connected with the gear box (53), the first bevel gear (52) is meshed with a second bevel gear (54), the lower end of the second bevel gear (54) penetrates through the gear box (53) to be fixedly connected with a fourth rotating shaft (56), the fourth rotating shaft (56) penetrates through a cleaning chamber (58) and is fixed with a cleaning brush (57), the fourth rotating shaft (56) is rotatably connected with the cleaning chamber (58), the cleaning brush (57) is tightly attached to a track (1), an electric telescopic rod (55) is installed at the lower bottom of the right side of a stirring unit of a lower shell (42), a separation plate (551) is fixedly connected below the electric telescopic rod (55), a drainage tube (59) penetrates through the lower part of the separation plate (551) to extend to the bottom of a drainage tube (59), and the left end of the drainage tube (59) is communicated with a stirring chamber, the right end of the drainage tube (59) is connected with the cleaning chamber (58).
8. The track cleaning device for urban rail transit according to claim 1, further comprising:
the tension sensor is arranged in the motor protection box (3) and used for detecting tension applied to the first belt (11);
the first rotating speed sensor and the second rotating speed sensor are respectively arranged on the first motor belt pulley (10) and the transmission shaft belt pulley (15) and are respectively used for detecting the circumferential rotating speeds of the first motor belt pulley (10) and the transmission shaft belt pulley (15);
the speed sensor is arranged on the first belt (11) and used for detecting the moving speed of the first belt (11);
the controller is arranged on the motor protection box (3), the controller is electrically connected with the first rotating speed sensor, the second rotating speed sensor, the speed sensor and the tension sensor, and the controller controls the first motor (9) to work based on the first rotating speed sensor, the second rotating speed sensor, the speed sensor and the tension sensor, and the method comprises the following steps:
step 1: according to the detection values of the tension sensor and the speed sensor and the formula (1), the slip rate of the transmission of the first belt (11) can be calculated:
wherein ω ishIs the transmission slip ratio of the first belt (11), C is the area of the cross section of the first belt (11), v is the moving speed of the first belt (11) detected by the speed sensor, FdThe current tension of the first belt (11) detected by the tension sensor, E is the elastic modulus of the first belt (11), E is a natural constant and takes a value of 2.72, m is the weight of the first belt (11), and f is1Is a coefficient of friction between the first belt (11) and the first motor pulley (10), f2The friction coefficient between the first belt (11) and the transmission shaft belt pulley (15) is shown, alpha is an included angle between a connecting line of central points of the first motor belt pulley (10) and the transmission shaft belt pulley (15) and the first belt (11), sin is sine, and lg is a logarithm taking 10 as a base;
step 2: and calculating the actual transmission efficiency of the first belt (11) according to the formula (2) and the detection values of the first rotating speed sensor and the second rotating speed sensor:
where eta is the actual transmission efficiency of the first belt (11), FcIs the initial tension, V, of the first belt (11)1The rotation speed, V, of a first motor pulley (10) detected by the first rotation speed sensor2The rotation speed P of the transmission shaft belt pulley (15) detected by the second rotation speed sensorHA loss of power, P, of friction of the bearings of the first motor (9) during the transmission of said first belt (11)1For rated frictional power loss, P, of the first motor pulley (10)2For rated frictional power loss, R, of the propeller shaft pulley (15)1Is the radius, R, of the first motor pulley (10)2Is the radius of the transmission shaft pulley (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011245680.5A CN112391992A (en) | 2020-11-10 | 2020-11-10 | Track cleaning device for urban rail transit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011245680.5A CN112391992A (en) | 2020-11-10 | 2020-11-10 | Track cleaning device for urban rail transit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112391992A true CN112391992A (en) | 2021-02-23 |
Family
ID=74599415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011245680.5A Withdrawn CN112391992A (en) | 2020-11-10 | 2020-11-10 | Track cleaning device for urban rail transit |
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| Country | Link |
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| CN (1) | CN112391992A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118273264A (en) * | 2024-06-03 | 2024-07-02 | 河南桢梓建筑工程有限公司 | A comprehensive inspection vehicle for urban rail transit projects |
-
2020
- 2020-11-10 CN CN202011245680.5A patent/CN112391992A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118273264A (en) * | 2024-06-03 | 2024-07-02 | 河南桢梓建筑工程有限公司 | A comprehensive inspection vehicle for urban rail transit projects |
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