CN111495916A

CN111495916A - Dust collector of road surface milling machine

Info

Publication number: CN111495916A
Application number: CN202010359155.XA
Authority: CN
Inventors: 刘洋; 王明杰; 田全乐
Original assignee: Tangshan Dacheng Road And Bridge Co ltd
Current assignee: Tangshan Dacheng Road And Bridge Co ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-08-07
Anticipated expiration: 2040-04-29
Also published as: CN111495916B

Abstract

The invention relates to a dust removal device of a pavement milling machine, which belongs to the technical field of pavement maintenance and comprises a milling chamber, a material conveying belt and a dust removal channel, wherein the dust removal channel is communicated with the milling chamber, a fan is arranged at the end part of the dust removal channel and is connected with the material conveying belt, the dust removal channel comprises an air outlet, the air outlet is communicated with a speed reducer with the gradually reduced cross-sectional area, the speed reducer comprises a dust exhaust area communicated with the material conveying belt, and the direction of the air outlet entering the speed reducer is crossed with the direction of a mixture discharged from the dust exhaust area. The invention solves the problem that the mixture falls onto the conveying belt at a higher speed and still can raise dust, and has the effect of reducing the dust raising during the dust removal of the milling machine.

Description

Dust collector of road surface milling machine

Technical Field

The invention relates to the technical field of pavement maintenance, in particular to a dust removal device of a pavement milling machine.

Background

The road surface milling machine is one of the main machines of the road surface maintenance construction machinery, milling a damaged old paving layer by the road surface milling machine, and then laying a new surface layer is the most economical modern maintenance method, and the method is widely used in maintenance engineering of town municipal roads and highways due to the high working efficiency, simple construction process, easy control of milling depth, convenient and flexible operation, good maneuverability, direct recycling of milled old materials and the like.

The prior Chinese utility model with the publication number of CN208965379U discloses a device for removing dust and milling waste materials for a road milling machine, which is characterized in that an original milling machine is used as a basic frame, a hydraulic motor speed increasing device is assembled at a front hydraulic motor of the milling machine and is connected with and drives a high-pressure centrifugal fan to rotate at a high speed; the high-pressure centrifugal fan is beside dust removal hoses on two sides of the machine body, the dust removal hoses are matched with a steel air duct in the milling chamber and fixed at a discharge port of the milling chamber, negative pressure is generated in the milling chamber, a mixture of particle dust and water vapor in the milling process is sucked, the mixture is conveyed to a conveying belt through the dust removal hoses, and the mixture is conveyed to a hopper car in front of the conveying belt so as to be conveyed away. The dust removal hose thus improves the air quality and the operator visibility of the milling area.

The above prior art solutions have the following drawbacks: under the negative pressure created by the fan, the mixture is sucked at a faster rate, falls onto the conveyor belt at a faster rate, and still lifts up the dust.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the dust removal device of the pavement milling machine, which has the effect of reducing the dust emission during the dust removal of the milling machine.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides a dust collector of road surface milling machine, includes mills the room of milling, defeated material belt and dust removal passageway, dust removal passageway with mill room intercommunication, dust removal passageway tip is provided with the fan and connects defeated material belt, dust removal passageway includes the air outlet, and the decelerator that air outlet intercommunication cross sectional area reduces gradually, decelerator include with the dust exhaust district of defeated material belt intercommunication, and there is the contained angle air outlet entering decelerator's direction and the direction of dust exhaust district exhaust mixture.

By adopting the technical scheme, when the milling machine performs milling operation, particle dust is generated in the milling chamber. The high-speed operation of fan makes the indoor negative pressure that produces of milling, mix such as the indoor dust granule of milling and steam is sucked the tip of dust removal passageway, before the material conveying belt falls to the mixture, flow into decelerator in, the air outlet has the contained angle with the dust exhaust direction in dust exhaust district, the flow direction of mixture in decelerator changes, and speed reduction, and decelerator dwindles the export gradually, the mixture in the dust removal passageway is obstructed at the in-process of discharging from the dust exhaust district, therefore the mixture is slowed down, make the mixture speed of high-speed flow slow down the back, put into on the material conveying belt, the raise dust reduces.

The present invention in a preferred example may be further configured to: the speed reducer comprises a plurality of stepped chambers, and the cross-sectional area of the chamber close to the air outlet is the largest.

Through adopting above-mentioned technical scheme, in the mixture among the dust removal passageway flowed into decelerator, at first got into the several cavity, because the cavity is cascaded arrangement, the lateral wall of cavity obstructed it in the direction of high-speed mixture's flow, high-speed mixture is cut at the speed reduction of several cavity and is left, and speed slows down and stops even in decelerator, and partly steam that carries the dust granule does not receive the interception, discharges on defeated material belt from the dust exhaust district to this effect that realizes decelerating the mixture.

The present invention in a preferred example may be further configured to: the chamber includes that cross sectional area is minimum and keep away from the fourth chamber of air outlet, and fourth chamber top is connected with the connection chamber that upwards extends, and connection chamber intercommunication has the installation cavity, and one side that the connection chamber was kept away from to the installation cavity is the dust exhaust district.

Through adopting above-mentioned technical scheme, consequently the mixture gets into the connection chamber from the fourth cavity, because the mixture is when getting into the connection chamber, the direction of flow has changed, consequently, the flow velocity of mixture slows down to some extent, the mixture continues to flow into the dust exhaust district from the installation cavity, the mixture is longer at the in-process route that flows, and crooked lateral wall has the effect that hinders the speed of going on the rectilinear direction, connection chamber and installation cavity speed slow down until the decelerator that falls out when passing through, the mixture of this moment has steadily been put in on the defeated material belt, the raise dust significantly reduces.

The present invention in a preferred example may be further configured to: the installation cavity top intercommunication induced air district, install the air inlet machine on the lateral wall in induced air district, the air inlet direction of air inlet machine is parallel with installation cavity length extending direction, and the one end and the dust exhaust district intercommunication of air inlet machine are kept away from in induced air district.

By adopting the technical scheme, because the direction turning exists in the process of connecting the fourth chamber to the connecting chamber, the flowing speed of the mixture is reduced, and some mixtures can be accumulated and blocked at the connecting position of the connecting chamber and the fourth strong force, so that after the air inlet machine is started, parallel air is formed above the mounting chamber, the air pressure in the air induction area is small, the air pressure difference is formed between the connecting chamber and the fourth chamber and the air induction area, the mixture in the connecting chamber and the fourth chamber is guided into the mounting chamber, and under the blowing of the air, the mixture impacts the side wall of the dust removal port and is discharged onto the conveying belt along the dust removal port. The mixture is prevented from being blocked in the connecting cavity, so that the mixture smoothly falls onto the conveying belt from the dust removing opening.

The present invention in a preferred example may be further configured to: the extending direction of the connecting cavity is perpendicular to the material conveying belt, and the extending direction of the mounting cavity is parallel to the material conveying belt.

Through adopting above-mentioned technical scheme, the connection chamber is perpendicular with defeated material belt, therefore the mixture is better at the speed reduction effect when getting into the connection chamber from the fourth chamber, and the induced air district of installation cavity top forms simultaneously and connects the perpendicular wind of chamber extending direction, makes the mixture can circulate simultaneously can not accelerate the velocity of flow of mixture as far as possible.

The present invention in a preferred example may be further configured to: the speed reducer comprises a bottom plate opened in a rotating mode, and the bottom plate is opened to be communicated with a material conveying belt.

Through adopting above-mentioned technical scheme, because decelerator's the effect of intercepting the mixture, most dust particles are static to be placed in decelerator, but pile up too much back when the dust particles, can hinder next mixture and get into decelerator, and then influence the dust removal effect in the operation. Therefore, when excessive dust particles are accumulated in the speed reducer, the bottom plate is opened, and the dust particles flow into the material conveying belt from the bottom plate.

The present invention in a preferred example may be further configured to: one end of the bottom plate is hinged to the speed reducer body through a rotating shaft, the rotating shaft is fixed to the bottom plate, the rotating shaft is controlled to rotate by the control assembly, and the control assembly runs at regular time.

Through adopting above-mentioned technical scheme, when opening the bottom plate, can adopt control assembly to open the bottom plate automatically to control assembly automatic start operation after a period of time makes the bottom plate rotate after a period of time and opens, therefore the dust granule in the decelerator clears up by oneself after a period of time, guarantees that the milling machine is at the in-process of operation, and the mixture probably continuously discharges on the material conveying belt.

The present invention in a preferred example may be further configured to: the control assembly comprises a first bevel gear fixed on the rotating shaft, a motor is arranged on the speed reducing device, a second bevel gear is arranged at the output end of the motor, and the first bevel gear is meshed with the second bevel gear.

Through adopting above-mentioned technical scheme, when the motor starts, the motor drives first bevel gear and rotates to make second bevel gear rotate, second bevel gear drives the axis of rotation and rotates, consequently drives the bottom plate with the axis of rotation and rotates and open, and the dust granule in the decelerator is put in on the material conveying belt, and when the motor reverses, bottom plate self-closing and locking, the operation is convenient.

The present invention in a preferred example may be further configured to: and a rubber pad is arranged at the edge of the bottom plate.

Through adopting above-mentioned technical scheme, when the bottom plate when closing, paste closely with the decelerator lateral wall, the rubber pad enables the bottom plate when closing, decelerator internal seal, makes the speed reduction effect better.

In summary, the invention includes at least one of the following beneficial technical effects:

1. before the mixture falls onto the conveying belt, the mixture flows into a speed reducer, and because the mixture in the dust removal channel is blocked in the process of being discharged from the dust exhaust area, the mixture is decelerated, so that the mixture flowing at high speed is reduced in speed and then is thrown onto the conveying belt, and the raised dust is reduced;

2. the air inducing area prevents the connecting cavity from being blocked, so that the mixture is easier to discharge out of the speed reducing device;

3. therefore, when excessive dust particles are accumulated in the speed reducer, the bottom plate is opened, and the dust particles flow into the material conveying belt from the bottom plate.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view showing the construction of a feed belt and a reduction gear according to the present invention;

FIG. 3 is a schematic view showing the structure of the reduction gear unit according to the present invention;

FIG. 4 is a diagram showing a flow route of a mixture in the reduction gear according to the present invention;

FIG. 5 is a schematic view showing the structure in which the bottom plate of the reduction gear transmission is opened according to the present invention;

fig. 6 is a partially enlarged schematic view of a portion a in fig. 5.

In the drawings, 1, a milling machine body; 2. milling and planing chamber; 3. a dust removal channel; 31. an air outlet; 4. a fan; 5. a reduction gear; 51. a chamber; 511. a first chamber; 512. a second chamber; 513. a third chamber; 514. a fourth chamber; 52. a connecting cavity; 53. a mounting cavity; 531. a wind-inducing zone; 532. a dust exhaust area; 54. an air inlet machine; 55. a control component; 551. a base plate; 552. a motor; 553. a bevel gear; 56. a rubber pad; 57. a rotating shaft; 6. conveying belt.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the dust removing device of a road milling machine disclosed by the invention comprises a milling machine body 1, a milling chamber 2, a dust removing channel 3 and a material conveying belt 6. The milling chamber 2 is arranged at the bottom of the milling machine body 1, two dust removal channels 3 are connected to a discharge port of the milling chamber 2 and are respectively positioned at two sides of the discharge port, and the dust removal channels 3 are hung on the milling machine body 1. The material conveying belt 6 is connected to the front end of the milling machine body 1 and conveys the waste materials in the milling chamber 2 to a hopper car in front of the milling machine. The dust removal channel 3 is connected with a material conveying belt 6, the dust removal channel 3 is a rectangular tubular channel, and the side wall inside the dust removal channel 3 is smooth arc-shaped.

Referring to fig. 2, a hydraulic motor speed increasing device is mounted above the material conveying belt 6 to drive the high-pressure centrifugal fan 4 to rotate at a high speed. The end parts of the two dust removing channels 3 are gathered together and connected with the fan 4, and the fan 4 drives the two dust removing channels 3 to draw air outwards together. Because the dust removal channel 3 is fixed with the discharge hole of the milling chamber 2, the fan 4 running at high speed enables negative pressure to be formed in the milling chamber 2, the mixture of particle dust and water vapor in the milling process is sucked, and the mixture is conveyed to the material conveying belt 6 by the dust removal channel 3.

Referring to fig. 2 and 3, an air outlet 31 of the dust removal channel 3 is further disposed on one side of the air outlet of the fan 4, a motor driving the fan 4 to rotate is supported on the inner wall of the air outlet 31, a speed reduction device 5 is fixed on a rack of the material conveying belt 6, and the air outlet 31 is connected with one side surface of the speed reduction device 5. The speed reducer 5 is in a stage type, is connected together by cavities with different sizes, and comprises a first cavity 511, a second cavity 512, a third cavity 513 and a fourth cavity 514, the cross-sectional areas of which are gradually reduced and communicated, the first cavity 511 is connected with the air outlet 31, and the height of the first cavity 511 is the same as the diameter of the dust removal channel 3; the second chamber 512 is communicated with the first chamber 511, and the height of the second chamber 512 is smaller than that of the first chamber 511, so that the dust removing channel 3 throws the mixture into the first chamber 511, one part of the mixture impacts the side wall of the first chamber 511, and the other part of the mixture enters the inside of the second chamber 512; the third chamber 513 has a smaller height than the second chamber 512 and the fourth chamber 514 has a smaller height than the third chamber 513. The top surface of the fourth chamber 514 is communicated with a vertical connecting cavity 52, the connecting cavity 52 is vertically communicated with a mounting cavity 53, and the other end of the mounting cavity 53 is communicated with the material conveying belt 6.

Referring to fig. 3 and 4, therefore, the dust removal channel 3 blows the mixture with a certain flow velocity into the speed reduction device 5, a part of the mixture is intercepted and reduced by the first chamber 511, the second chamber 512 and the third chamber 513 respectively, the particulate dust falls into the speed reduction device 5 until the mixture flows into the third chamber 513 and the fourth chamber 514, and most of the high-velocity mixture is intercepted in the speed reduction device 5; the high-speed mixture which is not locally intercepted, such as moisture with a part of the particulate dust, is discharged from the installation chamber 53 onto the conveyor belt 6.

Referring to fig. 3 and 4, the installation cavity 53 is divided into an induced air region 531 and a dust exhaust region 532, the induced air region 531 is arranged at the upper end of the installation cavity 53 and above the connection cavity 52, the induced air region 531 is communicated with the dust exhaust region 532, and the dust exhaust region 532 is far away from the connection cavity 52 and is perpendicular to the conveyor belt 6. An air inlet machine 54 is arranged on the side wall of the induced draft area 531 facing the milling machine body 1, a motor for driving the air inlet machine 54 to rotate is supported and fixed on the side wall of the top of the connecting cavity 52, and the air inlet machine 54 horizontally induces air into the induced draft area 531. Since the extending direction of the connection chamber 52 is perpendicular to the air intake direction of the fourth chamber 514, the mixture is easily clogged at the position where the fourth chamber 514 and the connection chamber 52 are connected, and at the same time, the connection chamber 52 and the installation chamber 53 are easily clogged. When the air inlet fan 54 is turned on, air parallel to the extending direction of the material conveying belt 6 is formed in the air induction area 531, so that the air pressure in the air induction area 531 is reduced, and the mixture in the connecting cavity 52 is sucked to the position of the mounting cavity 53 under the guidance of the air pressure difference, and impacts on the end parts of the mounting cavity 53 and the air induction area 531, namely the side wall of the dust exhaust area 532 along with the air. The mixture falls down along the dust exhaust area 532 onto the material conveying belt 6.

Therefore, the dust removing direction of the dust discharging area 532 is perpendicular to the air outlet direction of the fan 4, when the mixture enters the dust discharging area 532 from the air outlet 31, the path is long, the curved side wall has the effect of blocking the running speed in the linear direction, the speed is slowed down until the mixture falls out of the speed reducer 5, the mixture at the moment is stably put on the material conveying belt 6, and the raised dust is greatly reduced.

Referring to fig. 5 and 6, the bottom surface of the reduction gear 5 can be rotated open, and when too much dust is accumulated in the reduction gear 5, the normal air intake speed is affected. Therefore, the bottom plate 551 of the reduction gear 5 is controlled to be rotated and opened by the control unit 55, one side of the bottom plate 551 is hinged on the reduction gear 5 by the rotation shaft 57, and there is a motor 552 on the outer side wall of the reduction gear 5, a first bevel gear 553 is fixed to the output end of the motor 552, a second bevel gear 553 is fixed to the rotation shaft 57, and the first bevel gear 553 is engaged with the second bevel gear 553. The rest edge of the bottom plate 551 is provided with a rubber pad 56, and when the bottom plate 551 is closed, the rubber pad 56 is tightly abutted against the side wall of the reduction gear 5.

When the bottom plate 551 is opened to discharge dust, the motor 552 is started, the motor 552 drives the first bevel gear 553 to rotate, the second bevel gear 553 rotates, the bottom plate 551 is rotated to be opened, the particle dust stored on the bottom plate 551 is poured onto the material conveying belt 6 from the inclined bottom plate 551, the particle dust at the moment is in a static state and does not flow, and therefore the dust flying is greatly reduced when the particle dust falls into the material conveying belt 6.

The motor 552 is provided with a timing control device, and after the milling machine is operated for a period of time, the motor 552 is automatically turned on, the speed reducing device 5 is cleaned, the bottom plate 551 is automatically turned in the reverse direction to be closed, and the bottom plate 551 is fastened on the speed reducing device 5.

The implementation principle of the embodiment is as follows: when the milling machine is in operation, the centrifugal fan 4 and the air inlet machine 54 are opened, milling waste in the milling chamber 2 is discharged onto the material conveying belt 6 through the material suction channel, and dust is sucked into the speed reducing device 5 through the dust removal channel 3.

After the mixture flowing at a high speed is decelerated by the first chamber 511, the second chamber 512, the third chamber 513 and the fourth chamber 514, a part of the particle dust stays in the decelerating device 5, and another part of the mixture is discharged from the dust discharging area 532.

The air flowing in the air inducing region 531 makes a pressure difference with the connecting cavity 52, and the mixture possibly accumulated and blocked in the connecting cavity 52 and the fourth chamber 514 is sucked into the air inducing region 531, guided into the dust exhaust region 532 by the air, and falls onto the material conveying belt 6 along the dust exhaust region 532.

After a period of time, the motor 552 is automatically started, the first bevel gear 553 and the second bevel gear 553 are used for transmission, the bottom plate 551 is opened, and dust falls onto the material conveying belt 6 from the speed reducing device 5.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a dust collector of road surface milling machine, includes milling room (2), defeated material belt (6) and dust removal passageway (3), dust removal passageway (3) with mill room (2) intercommunication, dust removal passageway (3) tip is provided with fan (4) and connects defeated material belt (6), its characterized in that: dust removal passageway (3) include air outlet (31), and air outlet (31) intercommunication cross sectional area reduces decelerator (5) gradually, and decelerator (5) include with the dust exhaust district (532) of defeated material belt (6) intercommunication, and there is the contained angle in the direction that air outlet (31) got into decelerator (5) and the direction of dust exhaust district (532) discharge mixture.

2. The dust removing device of a road milling machine as claimed in claim 1, wherein: the speed reduction device (5) comprises a plurality of stepped chambers (51), and the cross-sectional area of the chamber (51) close to the air outlet (31) is the largest.

3. The dust removing device of a road milling machine as claimed in claim 2, wherein: chamber (51) include cross sectional area minimum and keep away from fourth chamber (514) of air outlet (31), and fourth chamber (514) top is connected with connection chamber (52) that upwards extend, and connection chamber (52) intercommunication has installation cavity (53), and one side that connection chamber (52) were kept away from in installation cavity (53) is dust exhaust area (532).

4. The dust removing device of a road milling machine as claimed in claim 3, wherein: the dust exhaust fan is characterized in that an induced air area (531) is arranged above the mounting cavity (53), an air inlet fan (54) is mounted on the side wall of the induced air area (531), the air inlet direction of the air inlet fan (54) is parallel to the length extending direction of the mounting cavity (53), and a dust exhaust area (532) is arranged at one end, far away from the air inlet fan (54), of the induced air area (531).

5. The dust removing device of a road milling machine as claimed in claim 4, wherein: the extending direction of the connecting cavity (52) is vertical to the material conveying belt (6), and the extending direction of the mounting cavity (53) is parallel to the material conveying belt (6).

6. The dust removing device of a road milling machine as claimed in claim 1, wherein: the speed reduction device (5) comprises a bottom plate (551) which is opened in a rotating mode, and the bottom plate (551) is opened to be communicated with the material conveying belt (6).

7. The dust removing device of a road milling machine as claimed in claim 6, wherein: one end of the bottom plate (551) is hinged with the speed reducing device (5) through a rotating shaft (57), the rotating shaft (57) is fixed with the bottom plate (551), the rotating shaft (57) is controlled by the control assembly (55) to rotate, and the control assembly (55) runs at regular time.

8. The dust removing device of a road milling machine as claimed in claim 7, wherein: the control assembly (55) comprises a first bevel gear (553) fixed on the rotating shaft (57), a motor (552) is arranged on the speed reducing device (5), a second bevel gear (553) is arranged at the output end of the motor (552), and the first bevel gear (553) is meshed with the second bevel gear (553).

9. The dust removing device of a road milling machine as claimed in claim 6, wherein: the edge of the bottom plate (551) is provided with a rubber pad (56).