CN112301937A - Railway tunnel sleeper inner track bed coal suction vehicle set and corresponding coal suction method - Google Patents

Abstract

A coal-absorbing train set for a track bed in a railway tunnel sleeper comprises a main absorption train and a material train, wherein the main absorption train and the material train are sequentially connected, the main absorption train comprises a main absorption train frame (201), and the main absorption train frame (201) is arranged on a third driving walking bogie (202) and a fourth driving walking bogie (207); a cabin (203), a main dust absorption and removal system (205) and a main air suction fan chamber (208) are arranged on a main suction vehicle frame (201); the lower part of the frame (201) of the main suction vehicle is also provided with a main suction working device (204) and a first conveying belt (206). The coal suction car set can safely and efficiently clean the coal dust in the sleeper; the main suction vehicle is specially designed to ensure the axle weight, the gravity center, the length, the noise reduction and the comfort; the dust removal system adopts three-stage dust removal of gravity dust removal, cyclone dust removal and cloth bag dust removal, and the dust emission concentration is less than or equal to 30mg/m³。

Description

Railway tunnel sleeper inner track bed coal suction vehicle set and corresponding coal suction method

Technical Field

The invention relates to a movable railway track bed coal suction vehicle set, in particular to a large-scale operation vehicle for absorbing dirt such as pulverized coal and the like deposited on the surface of a track bed within a range of 2.6 meters in a railway tunnel, belonging to the technical field of railway engineering equipment.

Background

The special lines of coal transportation railways such as Shu, Shuhuang and Daqin are mainly used for coal transportation, and are limited by loading efficiency and technical means in the transportation process, the carriage of a train filled with coal is in an open state, and when the train enters and exits a tunnel, a small amount of surface pulverized coal filled in the carriage is rolled out of the carriage by airflow and scattered on the surface of a ballast bed. According to on-site feedback, the thickness of the coal dust on the surface of the ballast bed is 10mm on average every day, scattered coal dust is continuously accumulated on the ballast bed, the more the coal dust is accumulated, the thicker the coal dust is, steel rails and fasteners can be buried even in serious conditions, and on one hand, the safe operation of a train can be seriously influenced; on the other hand, the line of sight of a driver is influenced, the line of sight is prevented from being observed and checked by staff, and the line of sight must be cleaned regularly.

In the past, the section with serious dust in the tunnel is mainly cleaned manually, but the mode has the disadvantages of high labor intensity, difficult transportation of cleaned coal dust, serious field dust pollution, severe environment and unprotected operation safety and health of personnel. The adoption of mechanized cleaning can reduce the number of operators, improve the cleaning efficiency and shorten the cleaning time.

CN105442488A discloses a track bed sewage suction truck for cleaning dirt such as coal dust deposited on the surface of a track bed in a tunnel. The working principle of the device is that the device adopts a blowing and sucking integrated mode to blow up the coal dust on the surface of the ballast bed plate, then the coal dust is sucked into the dust remover, and the coal dust is separated by the dust remover and then transferred into a material vehicle connected with the ballast bed sewage suction vehicle. There are several problems: (1) the coal absorption efficiency is low; (2) the dust remover is not designed to be explosion-proof, so that serious potential safety hazards exist; (3) the dust removal effect is poor, a large amount of coal dust is dispersed into the tunnel, and the hidden danger of coal dust explosion exists; these difficulties have been long-standing, and are a major potential safety hazard restricting the safe transportation of railways, and it is urgently needed to develop special equipment which is in line with the actual working characteristics on site and uses a mechanical operation mode to replace manual operation.

Disclosure of Invention

The invention aims to provide a track bed coal suction vehicle set in a railway tunnel sleeper, which can safely and efficiently clean and collect pulverized coal in a track bed of 2.6 meters and improve the safety of railway transportation.

The invention relates to a coal-absorbing vehicle set for a track bed in a railway tunnel sleeper, which comprises: the main suction vehicle and the material vehicle are sequentially connected.

In another preferred embodiment, the track bed coal absorption vehicle group in the railway tunnel sleeper comprises a power vehicle, a main absorption vehicle and a material vehicle, wherein the power vehicle, the main absorption vehicle and the material vehicle are connected in sequence.

Preferably, the main suction vehicle comprises a main suction vehicle frame mounted on a third drive running bogie and a fourth drive running bogie. A cabin, a main dust absorption and removal system and a main suction fan chamber are arranged on the frame of the main suction fan; the lower part of the frame of the main suction vehicle is also provided with a main suction working device and a first conveying belt.

The main suction working device is arranged at the rear part of the third driving walking bogie and is connected with the main dust suction and removal system through a pipeline, and an explosion-proof valve is arranged in the pipeline to prevent pulverized coal explosion flame from overflowing to cause secondary explosion.

The main dust absorption and removal system comprises an air inlet pipeline, a gravity dust collector, a cyclone dust collector, a bag-type dust collector, a fan, an explosion-proof valve, an explosion-release valve and a discharger, wherein the gravity dust collector, the cyclone dust collector and the bag-type dust collector are sequentially arranged and connected end to end, so that the dust removal effect is improved; explosion venting valves are uniformly arranged at the upper parts of three dust collectors, namely a gravity dust collector, a cyclone dust collector and a bag-type dust collector, so that the overflow of pulverized coal explosion flame to cause secondary explosion is prevented; the fan is arranged in the main fan suction room, and the noise reduction treatment is performed in the main fan suction room through sound insulation, so that low noise is guaranteed when the fan runs, and the operation comfort is improved.

The fan passes through the intake stack and connects in gravity dust collector, cyclone, sack cleaner, ventilates for gravity dust collector, cyclone, sack cleaner to be convenient for the dust removal operation, main suction fan room upper portion wind channel all is equipped with the guide plate including wind channel flaring, the upper reaches and the low reaches of this wind channel flaring simultaneously, with the even wind channel export that distributes of faster wind speed, in order to reduce the export wind speed, guarantees that fan export wind speed is lower, prevents the secondary raise dust.

Gravity dust collector, cyclone, sack cleaner low reaches all set up the tripper, first conveyer belt sets up in main suction dust removal system lower part gravity dust collector, cyclone, the tripper below of sack cleaner, the coal dust of the main suction dust removal system separation of being convenient for falls into first conveyer belt, and transport through this first conveyer belt and inhale coal truck group rear portion, first conveyer belt end-to-end connection to skip, first conveyer belt includes sealing device, thereby seal the processing, prevent that coal dust from spilling over in first conveyer belt butt joint process and the transportation process, produce the raise dust.

The explosion-proof valve is arranged at the inlet and the outlet of the dust remover and is rapidly closed when the dust remover explodes, so that the explosion flame is prevented from overflowing to cause secondary explosion.

The gravity dust collector is connected with a first discharger below, the cyclone dust collector is connected with a second discharger below, and the bag-type dust collector is connected with a third discharger below.

Preferably, the length of the ventilation pipeline between the outlet of the rotary explosion isolating device and the gravity dust collector is not less than 1 meter.

The first discharger, the second discharger and the third discharger are star-shaped dischargers.

Preferably, conveyer belts are arranged below the first discharger, the second discharger and the third discharger and used for conveying the dirt to a designated place.

The gravity dust collector comprises a gravity dust collector upper box body, a first channel steel frame, a gravity dust collector ash bucket, a first discharger and a baffle; the box body is connected to the first channel steel frame, the gravity dust collector ash bucket is connected to the lower portion of the first channel steel frame, and the gravity dust collector ash bucket is a bucket with a large upper portion and a small lower portion.

The main suction fan chamber is designed to reduce the speed of the air channel, the air channel is designed to be an inlet, an outlet and an internal guide plate, clean air is discharged from the outlet of the fan after being separated by a dust removal system, but the air speed is high, the pulverized coal in the tunnel can be blown up to cause secondary dust raising by direct discharge, the hidden danger of pulverized coal explosion exists, the air channel is required to be manufactured to reduce the ultrahigh air speed, the outlet resistance cannot be increased, the load of the fan is influenced, through design and analysis, the ultrahigh air speed of the outlet of the fan can be reduced to 2m/s finally by the speed reduction air channel, the pulverized coal around the outlet of the air channel is ensured not to raise dust, the guide plate adopts a streamline structure, a plurality of groups of guide plates are arranged in the air channel along the air flow direction, the air flow at the outlet of the. Meanwhile, in order to prevent rainwater from entering, the outlet of the air duct is designed to be waterproof, the air duct is inclined downwards at a certain angle, for example, the axis of the air duct is located in the range of 10-20 degrees below the horizontal line, and rainwater is prevented from entering the fan.

The main suction fan chamber is designed to reduce noise, soundproof cotton and a reflecting plate are additionally arranged in the fan chamber, so that the noise of the fan is isolated in the fan chamber in the operation process, and the noise of the field tunnel operation is ensured to be comfortable.

The dust removing system adopts three-level dust removal of gravity dust removal, cyclone dust removal and cloth bag dust removal, and adopts antistatic measures, spark prevention and explosion suppression and explosion release devices. For example, 1, an antistatic flame-retardant cloth bag is adopted in the cloth bag dust remover, 2, all connecting parts of the dust removal system are connected by bonding wires, and the two measures can transmit static electricity generated in the operation process to the ground.

The cross section outside of motor vehicle, main car and the material car of inhaling all sets up intelligent spraying dust device to can effectively reduce the buggy raise dust.

The material vehicle frame is arranged on a first traveling bogie of the material vehicle and a second traveling bogie of the material vehicle; the storage box is positioned at the upper part of the material vehicle frame and is arranged in the middle of the front part and the rear part of the material vehicle frame, the second conveying belt is positioned at the front part of the storage box and comprises a driving device, so that the second conveying belt can stretch back and forth; when the operation is finished, the second conveying belt is shortened to the operation position when the operation is carried out on a steel rail, and the material vehicle is connected with the main suction vehicle by the front-end vehicle coupler; the polishing belt is arranged at the rear end of the frame of the material vehicle through a rotary support; sealing the top of the throwing belt to prevent coal dust from overflowing in the butt joint process and the conveying process of the throwing belt to generate raise dust; meanwhile, the belt throwing has an automatic material storage function, is more intelligent and accurate in material storage, and simultaneously reduces the workload of operators, a material level sensor is arranged at the blanking position of the material storage bin, when the blanking is accumulated to a certain height, the material level sensor obtains a signal and feeds the signal back to a material vehicle main machine, and the main machine drives the main conveying belt to move forward to automatically push and feed the next section of material.

The main suction working device is mainly responsible for the coal suction operation in the length direction of the sleeper, namely the transverse 2600mm range. The main suction working device comprises a working trolley.

The first conveying belt comprises two horizontal sections and an additional inclined section, the first horizontal section can guarantee that the discharge opening of the dust removal system discharges materials completely, the included angle between the surface of the inclined section and the horizontal plane is 20-22 degrees, and the surface gradient of the inclined section is smaller than the coal powder repose angle.

The front part of the main suction vehicle is provided with a cabin which is divided into two parts, namely a rest room at the front part and a maintenance room at the back part. The rest room provides a comfortable environment to ensure the rest of the operators and refers to the data; the inside of the overhaul room is provided with a clamp table and a tool box, so that certain overhaul and maintenance capacity is ensured

The invention provides a method for absorbing coal by a track bed in a railway tunnel sleeper, which comprises the following steps:

step S1, the coal suction device is operated to the operation section to be sucked and is lowered to the rail surface;

step S2, the rolling brush is descended to the operation position, the rolling brush is started to clean the ballast bed, the fan is started to generate negative pressure at the inlet of the air inlet pipeline, and the swept dust is sucked into the dust removal system through the air inlet pipeline; during sweeping and sucking operation, the operation vehicle runs on the track at an operation speed;

step S3, after the dust concentration generated by the cleaning operation reaches a preset value, starting a spraying dust-settling device;

step S4, when the dust concentration is lower than the preset value, the spray dust settling device is closed;

and step S5, the dust in the air inlet pipeline is carried by the negative pressure air flow to enter a dust removal system and separated, the clean air is discharged by a fan, and the dust is conveyed to a designated place by a collecting and conveying device.

Preferably, in step S5, three-stage separation is adopted, i.e., dust is removed sequentially by a gravity dust remover, a cyclone dust remover and a bag-type dust remover.

Preferably, an explosion-proof valve is arranged between the air inlet pipeline and the dust removal system, so that the secondary explosion caused by explosion flame overflow of pulverized coal in the movement process is prevented.

Preferably, in the step S5, a material automatic detection device is used for collecting the dust and the pulverized coal, when the pulverized coal is accumulated to a preset height value, the detection device transmits a detection signal to the control device, and the control device starts the material conveying device to convey the accumulated pulverized coal to the material vehicle.

Preferably, the coal-suction vehicle set is used for the track bed in the railway tunnel sleeper.

The invention has the characteristics that: (1) the frame is designed to sink at the position of the dust removal system, and the design can further reduce the height and the gravity center of the dust removal system, so that the main suction vehicle can obtain excellent motion stability in the high-speed motion process; (2) the fan room is designed by adopting all aluminum, so that the weight of the tail of the vehicle is reduced to the maximum extent on the basis of ensuring the structural strength; (3) the ceiling of the engine room is designed by adopting all aluminum, so that the weight of the top is reduced, and the vertical gravity center is reduced to a preset range; (4) the main dust absorption and removal system is designed to reduce weight, so that the weight of the whole machine is ensured to meet the requirement of axle weight; (5) the main suction vehicle frame is subjected to weight reduction design on the basis of ensuring the static strength, and the frame static strength simulation analysis is carried out, so that the static strength standard of the main suction vehicle is met.

The key innovation points of the technical scheme of the track bed coal suction car group in the railway tunnel sleeper are as follows:

1) the track bed coal suction vehicle set in the railway tunnel sleeper can clean and collect the coal powder of the track bed within the range of 2.6 meters of the cross section of the track bed, and the safety and smoothness of the line are guaranteed.

2) Among this technical scheme, the main equipment that inhales adopts two round brushes to clean the dust collection mode who combines with big amount of wind, big negative pressure, has both guaranteed efficiency and has avoided the easy-to-explode buggy raise dust.

3) In the technical scheme, the dust removal system adopts a novel dust removal device which is antistatic, spark-proof and provided with an explosion-proof and explosion-venting device.

4) In the technical scheme, a spray dust settling technology is adopted in the pulverized coal conveying system. Except adopting closed blanking mouth in the design process, still installed spraying dust device additional, prevented the raise dust to reduce static accumulation to a certain extent. In addition, grounding wires are uniformly arranged on the pipeline and the dust remover, so that the static accumulation is prevented from generating sparks to detonate coal powder.

5) In the technical scheme, the engine is specially designed for air intake and exhaust, so that emission is guaranteed, dust is prevented, and the personal safety and equipment safety of crisis are avoided. Because the tunnel space is narrow and small, the ventilation is not smooth, and the accumulation of engine tail gas easily causes human casualty accidents, an engine and accessories which meet the Terr 4F emission standard are specially customized during design.

6) According to the technical scheme, the pulverized coal collected in the operation process is continuously accumulated in the material vehicle, and along with the application of an intelligent control technology, the automatic detection device and the working mechanism are linked in the material vehicle, so that the perfect combination of mechanical and electrical integration is realized, when the pulverized coal is accumulated to a set height, the pulverized coal is automatically conveyed and stored continuously, the labor intensity can be reduced, and the operation efficiency and the safety are ensured.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of a coal bed suction car group in a railroad tunnel tie according to the present invention;

fig. 2 is a schematic structural view of the vehicle 1 of the embodiment shown in fig. 1;

FIG. 3 is a schematic structural view of the main suction vehicle 2 of the embodiment shown in FIG. 1;

fig. 4 is a schematic structural view of the material cart 4 of the embodiment shown in fig. 1;

FIG. 5 is a schematic structural view of the main suction device of the embodiment shown in FIGS. 1 and 3;

FIG. 6 is a schematic structural diagram of a main dust suction and removal system of a coal-suction car group of a track bed in a railroad tunnel sleeper provided in this embodiment;

FIG. 7 is an enlarged view of a portion of the fan compartment of the embodiment of FIG. 3;

FIG. 8 is a perspective view of the fan compartment and baffle of the embodiment of FIG. 7;

FIG. 9 is a partial block diagram of the conveyor belt of the embodiment shown in FIG. 1;

FIG. 10 is an enlarged view of a portion of the conveyor belt of FIG. 9;

the numerical designations in fig. 1-10 represent:

1 power car 2 main suction car 3 material car 4 rail 5 coupler 6 connecting drawbar

101 power vehicle frame 102 front cab 103 first drive walking bogie 104 hand brake

105 power room 106 diesel tank 107 secondary drive running bogie 201 main suction frame

202 third drive travelling bogie 203 nacelle 204 main suction working device 205 main dust suction and removal system

206 first conveyor 207 fourth drive travelling bogie 208 main suction fan compartment 209 access door

210 deflector 401 second conveyor 402 skip first walking bogie 403 storage box

404 material car a second travel bogie 405 the material car frame 406 throws the strip.

Detailed Description

The invention is further illustrated by the following figures and examples.

Embodiment 1.1, the railway tunnel sleeper inner track bed coal suction car group is shown in fig. 1, and the railway tunnel sleeper inner track bed coal suction car group comprises a power car 1, a main suction car 2 and a material car 3, wherein the power car 1, the main suction car 2 and the material car 3 are connected through a coupler 5 and a connecting draw bar 6 to form an operation car group of the railway tunnel sleeper inner track bed coal suction car group; a first driving walking bogie 103, a second driving walking bogie 107, a third driving walking bogie 202, a fourth driving walking bogie 207, a first material vehicle walking bogie 402 and a second material vehicle walking bogie 404 are respectively arranged below the frames of the power vehicle 1, the main suction vehicle 2 and the material vehicle 3, and the operation of the coal-absorbing vehicle group of the railway tunnel sleeper inner track bed on the steel rail 4 is realized through the bogies.

As shown in fig. 2, the vehicle frame 101 is mounted on a first drive running bogie 103 and a second drive running bogie 107; the front end of the frame 101 of the power vehicle comprises a front cab 102; a power room 105 is arranged on the power vehicle frame 101 at the rear part of the front cab 102, and the front part of the power room 105 comprises a hand brake 104 arranged in the middle; a double engine, a hydraulic system and a generator set are arranged in the power room 105; a diesel tank 106 is also disposed below the vehicle frame 101.

As shown in fig. 3, the main vehicle frame 201 is mounted on a third drive running bogie 202 and a fourth drive running bogie 207; the cabin 203, the main dust absorption and removal system 205 and the main suction fan chamber 208 are sequentially arranged on the main suction fan frame 201 from front to back; the main suction working device 204 and the first conveying belt 206 are arranged below the main suction vehicle frame 201; the main suction working device 204 is arranged at the rear part of the third driving walking bogie 202, is connected with the main suction frame 201 by a top single traction rod and pulls the working trolley of the main suction working device 204 to move forward or backward; the main suction working device 204 is connected with the main suction dust removal system 205 through a pipeline, and an explosion-proof valve is arranged in the pipeline to prevent pulverized coal explosion flame from overflowing to cause secondary explosion.

The main dust absorption and removal system 205 comprises an air inlet pipeline, a gravity dust collector, a cyclone dust collector, a bag-type dust collector, a fan, an explosion suppression valve, an explosion release valve and a discharger, wherein the gravity dust collector, the cyclone dust collector and the bag-type dust collector are sequentially arranged and connected end to end, so that the dust removal effect is improved; explosion venting valves are uniformly arranged at the upper parts of three dust collectors, namely a gravity dust collector, a cyclone dust collector and a bag-type dust collector, so that the overflow of pulverized coal explosion flame to cause secondary explosion is prevented; the fan is arranged in the main suction fan chamber 208, and the interior of the main suction fan chamber 208 is subjected to sound insulation and noise reduction treatment, so that low noise is ensured when the fan operates, and the operation comfort is improved; the fan is connected with the gravity dust collector, the cyclone dust collector and the bag-type dust collector through an air inlet pipeline and ventilates the gravity dust collector, the cyclone dust collector and the bag-type dust collector, so that dust collection operation is facilitated; as shown in fig. 7, the main suction fan chamber 208 outside still includes access door 209 gravity dust collector, cyclone, sack cleaner low reaches all set up the tripper, first conveyer belt 206 sets up in the main gravity dust collector of absorbing dust removal system 205 lower part, cyclone, the tripper below of sack cleaner, the coal dust that is convenient for main dust removal system 205 to separate falls into first conveyer belt 206, and transport to the rear portion of coal absorption car group through this first conveyer belt 206, first conveyer belt 206 end-to-end connection is to material car 3, first conveyer belt 206 carries out sealing process, prevent that first conveyer belt 206 butt joint process and transportation in-process coal dust from spilling over, produce the raise dust. The explosion-proof valve is arranged at the inlet and the outlet of the dust remover and is rapidly closed when the dust remover explodes, so that the explosion flame is prevented from overflowing to cause secondary explosion.

As shown in fig. 4, the material truck frame 405 is mounted on the material truck first travel bogie 402 and the material truck second travel bogie 404; the storage box 403 is positioned at the upper part of the material vehicle frame 405 and is arranged on the material vehicle frame 405 in the front-back central mode, the second conveying belt 401 is positioned at the front part of the storage box 403, and the second conveying belt 401 comprises a driving device so as to be capable of stretching back and forth; during operation, the second conveying belt 401 extends and is lapped at the tail end of the first conveying belt 206 and is used for receiving coal dust on the first conveying belt 206 and conveying the coal dust to the storage box 403 through the second conveying belt 401, after the operation is finished, the second conveying belt 401 is shortened to an operation position during operation on a steel rail, and a front-end coupler is ensured to connect the material car 3 with the main suction car 2; the throwing belt 406 is arranged at the rear end of the material vehicle frame 405 through a rotary support; the top of the throwing belt 406 is sealed, so that coal dust is prevented from overflowing in the butt joint process and the conveying process of the throwing belt 406 to generate dust; meanwhile, the throwing belt 406 also has an automatic material storage function, is more intelligent and accurate in material storage, and reduces the workload of operators. A material level sensor is arranged at the blanking position of the storage bin, when the blanking is accumulated to a certain height, the material level sensor obtains a signal and feeds the signal back to a main machine of the material vehicle, and the main machine drives a main conveying belt to move forward to automatically push the material for feeding the next section.

The main suction working device 204 is mainly responsible for the coal suction operation within the range of 2600mm in the length direction of the sleeper, namely in the transverse direction. The main suction working device 204 comprises an operation trolley, the operation trolley comprises a trolley frame, the trolley frame is of a frame type structure, the front side and the rear side of the frame type structure are respectively provided with two working wheels which are used for falling on a steel rail to roll in operation, the front side and the rear side of the trolley frame are respectively provided with a rolling brush device, the rolling brush device comprises brush hair, a rolling brush shaft, a bearing seat and a guide rail, and the front/rear side direction is defined as the extending direction of the rail; the guide rail is fixedly arranged on the trolley frame, and an included angle between the direction of the guide rail and the vertical direction is an acute angle. The two ends of the rolling brush device are respectively provided with a bearing seat, the two side surfaces of the bearing seats are respectively provided with two grooves, and the rolling brush device is connected with the guide rail of the operation trolley frame through the grooves to realize the lifting of the rolling brush device along the guide rail so as to compensate the abrasion length of the brush hair.

During operation, the working wheel of the operation trolley of the main suction working device 204 falls on the surface of a steel rail, the roller brush on the operation trolley intelligently detects the thickness of a coal bed on the surface of a track bed in real time through a sensor (the sensor is not limited to an ultrasonic sensor, a laser sensor and the like which can realize the functions), the roller brush is controlled to lift and automatically adjust to the optimal cleaning height, the double-roller brush sweeping and sucking mechanism is started, coal dust on the surface of the sleeper can be lifted to the coal suction hood opening in the middle of the roller brush, then the coal dust is sucked from the coal suction hood opening through negative pressure generated by a fan, and the coal dust enters the dust removal system through the conveying pipeline. Along with the operation of the vehicle, the rolling brush can detect the height of the coal bed in real time and adjust the optimal cleaning height.

The main suction working device 204 is provided with a traversing cylinder between the front wheel seat and the rear wheel seat and the frame, when the trolley is placed on a curve, the traversing cylinder can transversely swing the whole main suction working device, so that the main suction working device accurately descends to a steel rail surface, and the trolley placing action is completed.

The front and the back of the main suction working device 204 are respectively provided with a set of locking devices. The platform of the locking device is welded and fixed with the frame, a guide block is arranged below the platform, a lock tongue action device is arranged at the top of the main suction working device 204, a locking cylinder is connected with the lock tongue action device so as to drive the lock tongue to stretch, and guide plates are arranged on the front end face and the rear end face of the operation trolley of the main suction working device 204. When the operation trolley needs to be lifted, the lifting oil cylinder pulls the operation trolley to be lifted, and the operation trolley is centered under the action of the guide plate and the guide block. When the operation trolley is lifted in place, the proximity switch on the platform of the locking device is triggered, the locking cylinder is allowed to act, the lock tongue is pushed to extend out, and locking is completed.

Dust pelletizing system adopts antistatic, spark-proof and takes flame proof, let out the novel dust pelletizing system of exploding the device in this embodiment. The dust removal system adopts a three-stage filter device of gravity dust removal, cyclone dust removal and cloth bag dust removal. Because the operation in the tunnel has higher emission requirements, three dust removers are adopted to treat different particles at the same time. The gravity dust collector mainly settles large particles (including a small amount of ballast), and the cyclone dust collector mainly settles medium particles; the bag-type dust collector mainly settles fine particles, ensures the discharge concentration and avoids polluting the tunnel operation environment. Aiming at explosive coal powder as a treatment object, different spark and static prevention designs are adopted on various dust collectors.

As shown in fig. 7 and 8: the main air suction fan chamber 208 is designed to reduce the speed of the air channel, and through the design of an inlet, an outlet and an internal guide plate, clean air separated by a dust removal system is discharged from an outlet of a fan, but the air speed is high, the pulverized coal in a tunnel can be blown up to cause secondary dust raising through direct discharge, and the hidden danger of pulverized coal explosion exists, so that the air channel needs to be manufactured to reduce the ultrahigh air speed, the outlet resistance cannot be increased, the fan load is influenced, through design and analysis, the ultrahigh air speed of the outlet of the fan can be finally reduced to 2m/s through the speed reduction air channel, the pulverized coal around the outlet of the air channel is ensured not to raise dust, the streamline design is mainly adopted, meanwhile, the guide plate is designed inside the air channel to uniformly distribute the air flow at the outlet of the fan to. Meanwhile, in order to prevent rainwater from entering, the outlet of the air duct is designed to be waterproof, and the air duct is inclined downwards by a certain angle, so that rainwater is prevented from entering the fan.

The main fan chamber 208 is designed to reduce noise, soundproof cotton and a reflecting plate are added in the fan chamber, so that the noise of the fan is isolated in the fan chamber in the operation process, and the noise of the field tunnel operation is comfortable.

Intelligent spraying dust removal system: at the car front portion, the rear portion, around the main operative installations of inhaling, on the side around the operative installations of inhaling, first conveyer belt 206, second conveyer belt 401 interconnect's position and first conveyer belt 206, second conveyer belt 401 and material car storage tank 403 are connected the position and have all been arranged spray dust collector, inhale coal truck group front portion both sides in railway tunnel sleeper inner track bed, the rear portion both sides, the main operative installations both sides of inhaling, dust concentration detection alarm device has all been arranged to the side operative installations both sides of inhaling, it opens spray dust collector promptly to detect dust concentration superscript and carries out the spraying dust fall, when being less than the dust concentration of injecing, spray dust collector stop work, guarantee intelligent operation.

The working mode of the novel coal suction vehicle group for the railway tunnel ballast bed in the embodiment is as follows:

the main suction working device: during operation, the power vehicle provides power to control the locking cylinder to unlock, the lifting oil cylinder is controlled to enable the main suction working device to fall on the rail surface, and the rolling brush lifting oil cylinder is controlled to enable the rolling brush to fall to an operation position. The motor drives the main suction fan, the rolling brush in the working device, the first conveying belt 206, the second conveying belt 401 and the material loading and transporting device to rotate, the track bed coal suction vehicle group in the railway tunnel sleeper is driven to move forward at a set speed, the dirt suction operation is carried out on coal dust within the range of 2.6 meters of the transverse width of the track bed, sucked dirt is filtered by the dust removal system and then subsided, and then the dirt is conveyed to a material vehicle connected with the material conveying system through the material conveying system.

Above-mentioned embodiment novel railway tunnel sleeper inner railway bed inhales in coal car group main layout compact, rational in infrastructure of inhaling, the buggy inhales via main equipment of inhaling, through the separation of dust pelletizing system, and the buggy falls to the conveyer belt of dust pelletizing system lower part and carries backward in real time, and clean air is via the fan discharge. The main suction working device is arranged in front of the dust removal system and can ascend and descend, so that the cleaning capability to the maximum extent is ensured. The first conveying belt 206 is designed by adding an inclined section into two horizontal sections, the first horizontal section can ensure that all the discharge openings of the dust removal system discharge the materials, the angle of the inclined section is 20-22 degrees, the inclination degree is smaller than the repose angle of the pulverized coal, the maximum efficiency of pulverized coal conveying can be ensured, the center disk distance between the front and the rear of the frame is ensured, and the length of the frame of the main suction truck is finally determined.

The frame of the main suction vehicle in the novel coal suction vehicle group for the railway tunnel ballast bed is designed by adopting the special-shaped beam, the front and the back of the frame are supported on the upper part of the bogie, and the frame is designed to be arched at the position of the main suction working device, so that the frame of the main suction working device 204 is guaranteed not to exceed a limit when being withdrawn and not to interfere with the frame. Meanwhile, a sufficient overhauling space of the main suction working device 204 is reserved, the main suction working device 204 can be overhauled and replaced without a trench, and the on-site overhauling and repairing of the main suction working device 204 are facilitated. The novel railway tunnel sleeper inner track bed coal suction vehicle group is characterized in that all parts of a main suction vehicle are arranged in a weight and gravity center balanced mode, the front axle weight and the rear axle weight of the whole vehicle are balanced and do not exceed the standard 23t axle weight, and the difference between the front axle weight and the rear axle weight is not more than 1 t. The transverse and longitudinal gravity centers are at the center of the frame, and the vertical gravity center is less than or equal to 1800 mm. The design mainly comprises the following steps: (1) the frame is designed to sink at the position of the dust removal system, and the design can further reduce the height and the gravity center of the dust removal system, so that the main suction vehicle can obtain excellent motion stability in the high-speed motion process; (2) the fan room is designed by adopting all aluminum, so that the weight of the tail of the vehicle is reduced to the maximum extent on the basis of ensuring the structural strength; (3) the ceiling of the engine room is designed by adopting all aluminum, so that the weight of the top is reduced, and the vertical gravity center is reduced to a preset range; (4) the main dust absorption and removal system is designed to reduce weight, so that the weight of the whole machine is ensured to meet the requirement of axle weight; (5) the main suction vehicle frame is subjected to weight reduction design on the basis of ensuring the static strength, and the frame static strength simulation analysis is carried out, so that the static strength standard of the main suction vehicle is met.

The novel main car suction fan chamber of the railway tunnel ballast bed coal suction car group is designed to reduce the speed of the air channel, and finally the ultrahigh air speed at the outlet of the fan is reduced to 2m/s through the design of an inlet, the design of an outlet and the design of an internal guide plate, so that pulverized coal dust around the outlet is prevented. Meanwhile, the fan chamber is subjected to noise reduction design, soundproof cotton and a reflecting plate are additionally arranged inside the fan chamber, so that the noise of the fan is isolated inside the fan chamber in the operation process, and the noise of field tunnel operation is ensured to be comfortable.

The cabin is arranged at the front part of the main suction vehicle of the novel railway tunnel track bed coal suction vehicle group, and is divided into two parts, namely a rest room and a maintenance room. The rest room provides a comfortable environment to ensure the rest of the operators and refers to the data; the inside of the overhaul room is provided with a clamp table and a tool box, so that certain overhaul and maintenance capacity is ensured.

The above-described embodiment has the following advantages:

1) the coal dust in the sleeper can be safely and efficiently cleaned;

2) the main suction vehicle is specially designed to ensure the axle load, the gravity center, the length, the noise reduction and the comfort.

2) The dust removal system adopts three-stage dust removal of gravity dust removal, cyclone dust removal and cloth bag dust removal, and the dust emission concentration is less than or equal to 30mg/m³。

3) The dust removing system adopts antistatic and spark-proof and a novel dust removing system with explosion-proof and explosion-releasing devices.

4) The main working device parts such as the main suction working device and the coal powder conveying system adopt an intelligent spraying dust-settling technology, so that the coal powder dust can be effectively reduced.

5) The design is comfortable, the noise is low, and the dust is few.

Claims (10)

1. A track bed coal-suction vehicle group in a railway tunnel sleeper comprises: the main suction vehicle and the material vehicle are sequentially connected, the main suction vehicle comprises a main suction vehicle frame (201), and the main suction vehicle frame (201) is arranged on a third driving walking bogie (202) and a fourth driving walking bogie (207); a cabin (203), a main dust absorption and removal system (205) and a main air suction fan chamber (208) are arranged on a main suction vehicle frame (201); the lower part of the frame (201) of the main suction vehicle is also provided with a main suction working device (204) and a first conveying belt (206); the method is characterized in that: the main suction working device (204) is connected with the main suction dust removal system (205) through a pipeline, and an explosion-proof valve is arranged in the pipeline to prevent pulverized coal explosion flame from overflowing to cause secondary explosion.

2. The train of coal-fired trucks for railroad tunnel sleepers as defined in claim 1, wherein: the main dust suction and removal system (205) comprises an air inlet pipeline, a gravity dust collector, a cyclone dust collector, a bag-type dust collector, a fan, an explosion suppression valve, an explosion venting valve and a discharger, wherein the gravity dust collector, the cyclone dust collector and the bag-type dust collector are sequentially arranged and connected end to end, and the explosion venting valve is uniformly arranged on the upper parts of the gravity dust collector, the cyclone dust collector and the bag-type dust collector, so that the phenomenon that pulverized coal explosion flame overflows to cause secondary explosion is prevented.

3. The train of coal-fired trucks for railroad tunnel sleepers as defined in claim 2, wherein: the fan is arranged in the main fan suction chamber (208), and soundproof cotton and a reflecting plate are additionally arranged in the main fan suction chamber (208).

4. A train of coal-fired trolleys for the track bed in railroad tunnel sleepers according to claim 2 or 3, wherein: the fan passes through the intake stack and connects in gravity dust collector, cyclone, the sack cleaner, for gravity dust collector, cyclone, the sack cleaner ventilates, main suction fan room (208) upper portion wind channel includes the wind channel flaring, the upper reaches and the low reaches of this wind channel flaring all are equipped with the guide plate, this guide plate adopts streamlined structure, the wind channel is inside to set up the multiunit guide plate along the wind current direction, thereby with the even distribution of the air current of fan export to between the runner that each guide plate in wind channel constitutes, finally make the wind channel play the deceleration effect.

5. The train of coal-fired trucks for railroad tunnel sleepers as defined in claim 4, wherein: gravity dust collector, cyclone, sack cleaner low reaches all set up the tripper, first conveyer belt (206) set up in main suction dust removal system (205) lower part gravity dust collector, cyclone, the tripper below of sack cleaner, the coal dust of the main suction dust removal system (205) separation of being convenient for falls into first conveyer belt (206), and transport to inhaling coal truck group rear portion through this first conveyer belt (206), first conveyer belt (206) end-to-end connection is to material car (3), first conveyer belt (206) include sealing device, prevent that first conveyer belt (206) butt joint process and transportation in-process coal dust from spilling over, produce the raise dust.

6. The train of coal-fired trucks for railroad tunnel sleepers as defined in claim 2, wherein: the explosion-proof valve is arranged at the inlet and the outlet of the dust remover and is rapidly closed when the dust remover explodes, so that the explosion flame is prevented from overflowing to cause secondary explosion.

7. The train of coal-fired trucks for railroad tunnel sleepers as defined in claim 1, wherein: the main dust absorption and removal system adopts three-level dust removal of gravity dust removal, cyclone dust removal and bag dust removal, adopts antistatic measures, spark prevention and explosion suppression and explosion release devices, adopts an antistatic flame-retardant bag in the bag dust remover, and adopts bond wires for connection among connecting parts of the main dust absorption and removal system, and the two measures can transmit static electricity generated in the operation process into the ground.

8. The train of coal-fired trucks for railroad tunnel sleepers as defined in claim 1, wherein: the cross section outside of motor vehicle, main car and the material car of inhaling all sets up intelligent spraying dust device to can effectively reduce the buggy raise dust.

9. The train of coal-fired trucks for railroad tunnel sleepers as defined in claim 1, wherein: the material vehicle frame (405) is arranged on a first material vehicle travelling bogie (402) and a second material vehicle travelling bogie (404); the storage box (403) is positioned at the upper part of the material vehicle frame (405) and is arranged on the material vehicle frame (405) in the front-back center mode, the second conveying belt (401) is positioned at the front part of the storage box (403), and the second conveying belt (401) comprises a driving device so as to be capable of stretching back and forth; during operation, the second conveying belt (401) extends and is lapped at the tail end of the first conveying belt (206) and is used for receiving coal dust on the first conveying belt (206), the coal dust is conveyed into the storage box (403) through the second conveying belt (401), after the operation is finished, the second conveying belt (401) is shortened to an operation position when the operation is carried out on a steel rail, and a front-end coupler is ensured to connect the material trolley (3) with the main suction trolley (2); the throwing belt (406) is arranged at the rear end of the material vehicle frame (405) through a rotary support; the top of the throwing belt (406) is sealed, so that coal dust is prevented from overflowing in the butt joint process and the conveying process of the throwing belt (406) to generate dust.

10. A method for absorbing coal from a track bed in a railway tunnel sleeper is characterized by comprising the following steps:

step S1, the coal suction device is operated to the operation section to be sucked and is lowered to the rail surface;

step S2, the rolling brush is descended to the operation position, the rolling brush is started to clean the ballast bed, the fan is started to generate negative pressure at the inlet of the air inlet pipeline, and the swept dust is sucked into the dust removal system through the air inlet pipeline; during sweeping and sucking operation, the operation vehicle runs on the track at an operation speed;

step S3, after the dust concentration generated by the cleaning operation reaches a preset value, starting a spraying dust-settling device;

step S4, when the dust concentration is lower than the preset value, the spray dust settling device is closed;

and step S5, the dust in the air inlet pipeline is carried by the negative pressure air flow to enter a dust removal system and separated, the clean air is discharged by a fan, and the dust is conveyed to a designated place by a collecting and conveying device.

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