CN105019340A - Asphalt pavement self-sealing vacuum compacting device and method - Google Patents
Asphalt pavement self-sealing vacuum compacting device and method Download PDFInfo
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- CN105019340A CN105019340A CN201510465708.9A CN201510465708A CN105019340A CN 105019340 A CN105019340 A CN 105019340A CN 201510465708 A CN201510465708 A CN 201510465708A CN 105019340 A CN105019340 A CN 105019340A
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- rubber layer
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Abstract
The invention discloses an asphalt pavement self-sealing vacuum compacting device and method. In the device, a rubber layer uniformly covers a roller along the circumference; a distribution disk is provided with a plurality of ducts; a ventilation joint is provided with an exhaust port and a suction inlet; each duct is provided with two outlets, and the outlets, the suction inlet and the exhaust port are positioned in the same section; the suction inlet is connected with the vacuum suction end of vacuum-pumping equipment; the exhaust port is connected with the exhaust end of the vacuum-pumping equipment; a plurality of rows of radial holes are uniformly formed in the rubber layer along the axial direction; all rows of radial holes are communicated through corresponding axial holes in the rubber layer; and the axial holes are communicated with the corresponding ducts on the distribution disk. According to the invention, a plurality of rows of air holes in the rubber layer connected to the ground are creatively combined with the paved asphalt mixture to form a sealed space, and the sealed space is relatively small, so that a required vacuum degree can be relatively easily achieved. In a compacting process, relative slip between a machine component and a pavement is not required, so that the air tightness of the sealed space is ensured, the service life of the machine is greatly prolonged, and the compacting quality and efficiency are improved.
Description
[technical field]
The invention belongs to engineering machinery field, relate to a kind of effecting HMA compaction device and method.
[background technology]
The superior performances such as driving is comfortable, noise is little owing to having for flexible pavement, be easy to mechanized construction, maintenance is convenient are used widely.Compacting is the important step that flexible pavement is built, and the performance of debulking methods and equipment directly affects the quality of efficiency of compaction and flexible pavement.Effecting HMA compaction equipment mainly quiet road roller and vibratory roller conventional both at home and abroad at present.Quiet road roller mainly contains rubber-tyred roller and smooth-wheeled roller, relies on the Action of Gravity Field of road roller in bituminous mixture during work, makes bituminous mixture generation plastic strain and closely knit.Vibratory roller utilizes the dither effect of exciting unit in vibrating wheels to make the particle rearrangement in bituminous mixture and closely knit.Because of the introducing of dither effect, the operation quality of vibratory roller and efficiency of compaction are better than quiet road roller, and double-steel wheeled vibratory roller is the main type for effecting HMA compaction.
Although highway in China development is rapid, integral level significantly improves, but because of reasons such as the construction period are short, overload of vehicle is serious, there are quality problems in part engineering, particularly the early stage local damage phenomenon in road surface is given prominence to, and some pavement usages just occurred the problems such as rut, crack, be full of cracks, hole groove and Water Damage less than 1 year.These problems not only cause huge maintenance cost, and extreme influence Pavement Condition and traffic safety, cause the double loss of economic and social benefit.Large quantity research shows both at home and abroad, compacting deficiency is the one of the main reasons causing flexible pavement quality, this is because the complicated three-phase system that bituminous mixture is made up of gas phase, liquid phase and solid phase, compacting process need remove gas phase as far as possible, make liquid phase and solid phase rearrange and reduce void content.Air in bituminous mixture mainly contains two parts, and a part is present in the free gas that open pores is communicated with air, and another part is the confining gas being present in hole of remaining silent in the form of bubbles.General, along with the carrying out of compacting, gas is constantly discharged, and bituminous mixture continues to occur plastic strain and closely knit.When being compacted to a certain degree, free gas becomes little, the remaining confining gas being difficult to spilling, being present in hole of remaining silent.These are defined a considerable number of " gas spring " by a large amount of bubbles that pitch wraps up, and are formed " spring-quality system " with supported gathering materials, and consume a large amount of compaction energy on the one hand; On the other hand, after compaction force removes, " gas spring " can rebound, and reduces the plastic strain of each compacting, reduces the efficiency of compacting.That is, " gas spring " effect of a large amount of confining gas hinders the carrying out of compacting process.
Visible, if can weaken or eliminate " gas spring " effect of bituminous mixture enclose inside gas, then, under the effect of equal compaction force, must efficiency of compaction and quality be promoted, reduce energy consumption.
[summary of the invention]
The object of the present invention is to provide a kind of flexible pavement self-seal vacuum compaction apparatus and method, to solve the problem existing for above-mentioned prior art; The inventive method carries out compacting under bituminous mixture being placed in vacuum environment, by weakening or eliminating gas spring effect and strengthen compaction process; The present invention, in this way as technical support, provides a kind of device realizing self-seal vacuum compacting, to improve efficiency of compaction and quality, prolonging service life of pavement.
To achieve these goals, the present invention adopts following technical scheme:
A kind of flexible pavement self-seal vacuum compaction apparatus, comprises rubber layer, roller and valve actuating mechanism; Rubber layer circumferentially evenly wraps up roller; Valve actuating mechanism comprises vaccum-pumping equipment, ventilation joint and gas distribution plate; Gas distribution plate is provided with some ducts; Gas distribution plate comprises large footpath section and path section; Large footpath section is fixed on and is arranged on roller one end; Described ventilation jiont treatment is in the path section of gas distribution plate; Ventilation joint is provided with exhaust opening and air entry; Exhaust opening and air entry are located axially at different cross section ventilation joint; On ventilation joint, large footpath section external diameter is less than the external diameter of rubber layer, and rubber layer compressive deformation during compacting and gas distribution plate external diameter can not kiss the earths; Described duct extends from large footpath section to gas distribution plate center position, is then transitioned into path section; Each duct axially all has two outlets along path section on path section periphery, and one exports with the air entry on ventilation joint in same cross section, and another outlet and the exhaust opening of taking a breath on joint are in same cross section; Air entry connects the vacuum suction end of vaccum-pumping equipment; Exhaust opening connects the exhaust end of vaccum-pumping equipment; Rubber layer has some row's radial holes vertically equably, often arranges radial hole and be connected at the inner axial hole by correspondence of rubber layer; Axial hole is connected with the corresponding duct on gas distribution plate.
Each radial hole is bellmouth, and collar extension is large, interior young.
Ventilation inner nosepiece wall has three grooves at axial diverse location place, and the size shape of groove is identical; The groove being positioned at bottom is air entry, and two grooves on both sides are exhaust opening; Two exhaust openings are in same cross section, and circumference difference 90-180 degree, all differs 60-120 degree with air entry circumference.
Ventilation joint inner surface is provided with several sealing rings and air entry and exhaust opening on ventilation joint is sealed to two separate space; Respectively there is a passive bearing at ventilation joint two ends, and ventilation joint and gas distribution plate can be relatively rotated.
Described vaccum-pumping equipment is vacuum pump or high pressure positive blower; Described roller is driving wheel or non-driving wheel; Described roller is quiet muller or vibrating wheels.
Self sealss region is formed with earth surface place below rubber layer.
Air entry is communicated with the axial hole in self sealss region; Exhaust opening is communicated with the part axial hole of self sealss region side.
A kind of flexible pavement self-seal vacuum debulking methods, comprising: form self sealss region with earth surface place below rubber layer, air entry is communicated with the axial hole in self sealss region; Vaccum-pumping equipment is by bleeding to the gas in the bituminous mixture in self sealss region with the radial hole of the rubber layer of earth surface, corresponding axial hole, corresponding passage and air entry below roller.
Exhaust opening is communicated with the part axial hole of self sealss region side; The gas of extraction is got back in the axial hole of the rubber layer in next-door neighbour self sealss region through the exhaust opening successively by joint of taking a breath, gas distribution plate respective channel by vaccum-pumping equipment, blows away the obstruction in rubber layer duct, achieves automatically cleaning.
Relative to prior art, the present invention has the following advantages:
The present invention forms confined space by the radial hole on rubber layer and earth surface, less vacuum chamber is formed with the radial hole that the banded rubber layer of earth surface gathers and ground, the space that needs vacuumize is very little, can easier reach higher vacuum level requirements.
The present invention is other sealing mechanisms relatively, and the vacuum chamber of formation relies on rubber and ground self-sealing, and not needing additional seal device, is rolling friction between the two, effectively ensures tightness on the one hand, on the other hand, utilize frictional force to achieve roller walking.
The duct that the gas that intermediate pump of the present invention or high pressure positive blower are discharged is close to self sealss region through gas passage from rubber layer is discharged, and can blow the possible obstruction in hole off, reach automatic cleaning action, ensure that the work of compaction apparatus energy continuous and effective.
The present invention, according to the requirement of different operating mode, can form compound rolling device with other compaction apparatus, further strengthen compaction process.As adopted vibrating wheels, while realizing vacuum debulk, also has vibratory compaction effect.
The present invention program is reasonable, and structure is simple, can give full play to the advantage of vacuum debulk.
[accompanying drawing explanation]
Fig. 1 be compaction apparatus of the present invention face structural representation.
Fig. 2 is the partial enlargement structural representation at Figure 1B place.
Fig. 3 is the present invention's A-A place sectional view in elevation.
In figure, the implication of each label is: 1-rubber layer, 2-roller, 3-drive system, 4 – radial holes, 5-axial hole, 6-sealing ring I, 7-bearing, 8-sealing ring II, 9-spare system, 10-bearing (ball) cover, 11-takes a breath joint, 12-gas distribution plate, 13-gas outlet, 14-exhaust opening.
[detailed description of the invention]
Below provide specific embodiments of the invention, it should be noted that the present invention is not limited to following specific embodiment, all equivalents done on technical scheme basis all fall into protection scope of the present invention.
Refer to shown in Fig. 1, a kind of flexible pavement self-seal vacuum of the present invention compaction apparatus, comprises self-seal vacuum mechanism, valve actuating mechanism, self-cleaning mechanism and idler wheel mechanism.
Self-seal vacuum mechanism comprises the rubber layer 1 with earth surface below roller 2 and roller, forms self sealss region below roller with the rubber layer of earth surface.
Valve actuating mechanism comprises vacuum pump or high pressure positive blower, gas distribution plate 12, ventilation joint 11, multiple support, potted component.
Self-cleaning mechanism comprises the rubber layer 1 in roller 2 and next-door neighbour self sealss region.
Roller 2 in idler wheel mechanism can be driving wheel, also can be non-driving wheel; Can be quiet muller, also can be vibrating wheels.Self-seal vacuum mechanism is connected with the vacuum suction end of valve actuating mechanism, and self-cleaning mechanism is connected with the exhaust end of valve actuating mechanism.
In self-seal vacuum mechanism, in roller 2 advances, constantly change with the rubber layer 1 of earth surface, therefore rubber layer 1 is circumferentially evenly wrapped up roller 2.Rubber layer 1 has vertically equably the several rows of aperture radial hole all identical with the degree of depth 4, often arrange radial hole 4 and be connected by axial hole 5 in rubber layer 1 inside.Each radial hole 4 is bellmouths, and collar extension is large, interior young.Axial hole 5 is connected with the vacuum suction end of valve actuating mechanism.
In valve actuating mechanism, vacuum pump or high pressure positive blower are that one can make gas constantly suck and discharge, to reach the equipment of object of bleeding; Vacuum pump optional gas transmission pump, the blower fan of high pressure positive blower to be blast be 30kPa ~ 200KPa or compression ratio e=1.3 ~ 3.One end and the roller 2 of gas distribution plate 12 are affixed; Gas distribution plate 12 is divided into large footpath section and path section.Large footpath section external diameter is less than rubber layer, rubber layer 1 compressive deformation and gas distribution plate 12 external diameter can not kiss the earth when ensureing compacting.Large footpath section is circumferentially having a collar aperture close to outer edge, is connected with axial hole 5 one_to_one corresponding on rubber layer 1, and all ducts extend to gas distribution plate 12 center position, are then transitioned into path section.The each duct of gas distribution plate 12 path section all has two outlets on path section periphery, outlet with the air entry 14 on ventilation joint 11 in same cross section, the outlet of another side and two exhaust openings 13 on ventilation joint 11 are in same cross section.Exhaust opening 13 and air entry 14 are located axially at different cross section ventilation joint 11.Ventilation joint 11 inwall has three grooves at axial diverse location place, and the size shape of groove is identical.The groove being positioned at bottom is air entry 14, and two grooves on both sides are exhaust opening 13.Two exhaust openings 13 are in same cross section, and circumference difference 90-180 degree, all differs 60-120 degree with air entry circumference.Ventilation joint 11 inner surface is provided with 3 sealing rings I 6 and air entry in two outlets about duct i.e. corresponding ventilation joint 11 14 and exhaust opening 13 is sealed to two separate space, avoids between the two gas blowby mutually.Respectively there is a passive bearing 7 at ventilation joint 11 two ends, ventilation joint 11 can be relatively rotated, with frame geo-stationary with gas distribution plate 12.There is end cap 10 each bearing 7 outer end.
Self-cleaning mechanism comprises the rubber layer 1 in roller 2 and next-door neighbour self sealss region, is connected with the exhaust end (exhaust end of vacuum pump or high pressure positive blower) of valve actuating mechanism.This section of rubber layer 1 not with earth surface, adjacent with the rubber layer 1 of sealing area; If there is obstruction to enter this section of rubber layer duct, can be blown out in time.
Gas in bituminous mixture is extracted out with rubber layer 1 passage of earth surface, gas distribution plate 12 respective channel, joint 11 air entry 14 of taking a breath by vacuum pump or high pressure positive blower successively below roller 2, reduces the gas content in bituminous mixture.The gas of extraction is got back in rubber layer 1 passage in next-door neighbour self sealss region by the exhaust opening 13 of joint 11 of taking a breath, gas distribution plate 12 respective channel by vacuum pump or high pressure positive blower more successively, in order to blow away the obstruction in rubber layer 1 duct, achieves automatic cleaning action.
A kind of flexible pavement self-seal vacuum of the present invention debulking methods, comprising:
Flexible pavement self-seal vacuum compaction apparatus is in operation process, and the rubber layer 1 outside roller 2 rolls with roller 2.Rubber layer 1 only has two states when rolling with roller 2, the first is that rubber layer 1 directly contacts with bituminous mixture, and the rubber layer 1 being in this state is referred to as ground section rubber layer; The second does not contact with bituminous mixture, and the rubber layer 1 being in this state is referred to as ungrounded section of rubber layer.Constantly switch between this two states in the course of the work.
Rubber layer 1 has two kinds of pore roads, be a kind ofly out the identical and radial hole 4 of in a row distribution in axial outer rim aperture, the degree of depth and array pitch are all equal inwards often to arrange radial hole 4; Another kind is the axial hole 5 identical with roller 2 axial direction, often will arrange radial hole 4 and be communicated with, and is connected to the corresponding duct on gas distribution plate 12.Air entry 14 on ventilation joint 11 forms air intake passage by the corresponding duct on gas distribution plate 12 and the duct be on ground section rubber layer; Exhaust opening 13 on ventilation joint 11 forms insufflation channel by the corresponding duct on gas distribution plate 12 and the duct be on ungrounded section of rubber layer 1.The gas of extraction by bleeding with rubber layer 1 passage of earth surface, gas distribution plate 12 respective channel, the gas of taking a breath in joint 11 air entry 14 pairs of bituminous mixtures below roller 2, then is got back in rubber layer 1 passage in next-door neighbour self sealss region through the exhaust opening 13 successively by joint 11 of taking a breath, gas distribution plate 12 respective channel by vacuum pump or high pressure positive blower.Compacting machinary moves forward, and some on rubber layer 1 coordinate duct to enter ground section, and some are in the duct of ground section gradually away from ground section, the vacuum debulk that just can continue bituminous mixture and so forth.
By apparatus of the present invention and method, under bituminous mixture is placed in vacuum environment, under bituminous mixture perforate hole is in vacuum environment, by gas differential pressure action, the gas in open pores overflows first rapidly; The confining gas of remaining silent in hole loses free gas balanced action, when ambient pressure difference is surged, once break through asphalt membrane parcel and make bubbles burst, also can become free gas and overflow rapidly.This just produces destruction to the dynamic balance relation of the alternate temporary stabilization of the interactional gas, liquid, solid in bituminous mixture inside three.Therefore, under vacuum chamber inside and outside differential pressure and less compaction force effect, the liquid phase of bituminous mixture and solid phase easily rearrange and closely knit.
Compared with common compacting, vacuum debulk can destroy " gas spring " effect of confining gas in bituminous mixture, strengthen compaction process, reduce compacting energy consumption, improve efficiency of compaction and quality, extend the application life on road surface, there is good economic and social benefit.
Claims (9)
1. a flexible pavement self-seal vacuum compaction apparatus, is characterized in that, comprises rubber layer (1), roller (2) and valve actuating mechanism;
Rubber layer (1) circumferentially evenly wraps up roller (2);
Valve actuating mechanism comprises vaccum-pumping equipment, ventilation joint (11) and gas distribution plate (12); Gas distribution plate (12) is provided with some ducts; Gas distribution plate (12) comprises large footpath section and path section; Large footpath section is fixedly mounted on roller (2) one end; Described ventilation joint (11) is installed in the path section of gas distribution plate (12); Ventilation joint (11) is provided with exhaust opening (13) and air entry (14); Exhaust opening (13) and air entry (14) are located axially at different cross section ventilation joint (11); Ventilation joint (11) upper large footpath section external diameter is less than the external diameter of rubber layer, and rubber layer (1) compressive deformation during compacting and gas distribution plate (12) external diameter can not kiss the earths; Described duct extends from large footpath section to gas distribution plate (12) center position, is then transitioned into path section; Each duct axially all has two outlets along path section on path section periphery, one exports with the air entry (14) in ventilation joint (11) in same cross section, and another outlet and the exhaust opening (13) of taking a breath on joint (11) are in same cross section; Air entry (14) connects the vacuum suction end of vaccum-pumping equipment; Exhaust opening (13) connects the exhaust end of vaccum-pumping equipment;
Rubber layer (1) has vertically equably some row's radial holes (4), often arrange radial hole (4) and be connected by corresponding axial hole (5) in rubber layer (1) inside; Axial hole (5) is connected with the corresponding duct on gas distribution plate (12).
2. a kind of flexible pavement self-seal vacuum compaction apparatus according to claim 1, it is characterized in that, each radial hole (4) is bellmouth, and collar extension is large, interior young.
3. a kind of flexible pavement self-seal vacuum compaction apparatus according to claim 1, is characterized in that, ventilation joint (11) inwall has three grooves at axial diverse location place, and the size shape of groove is identical; The groove being positioned at bottom is air entry (14), and two grooves on both sides are exhaust opening (13); Two exhaust openings (13) are in same cross section, and circumference difference 90-180 degree, all differs 60-120 degree with air entry circumference.
4. a kind of flexible pavement self-seal vacuum compaction apparatus according to claim 1, it is characterized in that, ventilation joint (11) inner surface is provided with several sealing rings joint (11) of will take a breath and goes up air entry (14) and exhaust opening (13) and be sealed to two separate space; Respectively there is a passive bearing (7) at ventilation joint (11) two ends, and ventilation joint (11) and gas distribution plate (12) can be relatively rotated.
5. a kind of flexible pavement self-seal vacuum compaction apparatus according to claim 1, it is characterized in that, described vaccum-pumping equipment is vacuum pump or high pressure positive blower; Described roller (2) is driving wheel or non-driving wheel; Described roller (2) is quiet muller or vibrating wheels.
6. a kind of flexible pavement self-seal vacuum compaction apparatus according to claim 1, is characterized in that, form self sealss region below rubber layer with earth surface place.
7. a kind of flexible pavement self-seal vacuum compaction apparatus according to claim 6, is characterized in that, air entry (14) is communicated with the axial hole (5) in self sealss region; Exhaust opening (13) is communicated with the part axial hole (5) of self sealss region side.
8. a flexible pavement self-seal vacuum debulking methods, it is characterized in that, adopt the flexible pavement self-seal vacuum compaction apparatus according to any one of claim 1 to 5, comprise: form self sealss region with earth surface place below rubber layer, air entry (14) is communicated with the axial hole (5) in self sealss region; Vaccum-pumping equipment is by bleeding to the gas in the bituminous mixture in self sealss region with the radial hole (4) of the rubber layer (1) of earth surface, corresponding axial hole (5), corresponding passage and air entry (14) below roller (2).
9. a kind of flexible pavement self-seal vacuum debulking methods according to claim 8, is characterized in that, exhaust opening (13) is communicated with the part axial hole (5) of self sealss region side; The gas extracted out is got back in the axial hole (5) of the rubber layer (1) in next-door neighbour self sealss region through the exhaust opening (13) successively by ventilation joint (11), gas distribution plate (12) respective channel by vaccum-pumping equipment, blow away the obstruction in rubber layer (1) duct, achieve automatically cleaning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510465708.9A CN105019340B (en) | 2015-07-31 | 2015-07-31 | Asphalt pavement self-sealing vacuum compacting device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510465708.9A CN105019340B (en) | 2015-07-31 | 2015-07-31 | Asphalt pavement self-sealing vacuum compacting device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105019340A true CN105019340A (en) | 2015-11-04 |
| CN105019340B CN105019340B (en) | 2017-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510465708.9A Expired - Fee Related CN105019340B (en) | 2015-07-31 | 2015-07-31 | Asphalt pavement self-sealing vacuum compacting device and method |
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| CN (1) | CN105019340B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593057A (en) * | 2019-08-26 | 2019-12-20 | 广东博智林机器人有限公司 | Floating robot |
| CN114232419A (en) * | 2022-01-11 | 2022-03-25 | 泉森建设(福建)有限公司 | Paver for municipal engineering construction and working method thereof |
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| SU937680A1 (en) * | 1978-02-08 | 1982-06-23 | Научно-Исследовательский Институт Строительных Конструкций | Apparatus for moulding concrete articles |
| SU941458A1 (en) * | 1974-12-24 | 1982-07-07 | Калининградский Завод "Стройдормаш" | Road roller |
| SU1395726A1 (en) * | 1986-10-27 | 1988-05-15 | Калининский политехнический институт | Road roller |
| RU2225909C1 (en) * | 2002-10-29 | 2004-03-20 | Деникин Эрнст Иванович | Road roller with vacuum chamber |
| CN102587264A (en) * | 2012-02-29 | 2012-07-18 | 长安大学 | Bituminous pavement vacuum road roller and pavement compaction method thereof |
| CN104527823A (en) * | 2014-12-12 | 2015-04-22 | 长安大学 | Sealing structure for vacuum compaction road roller |
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2015
- 2015-07-31 CN CN201510465708.9A patent/CN105019340B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU941458A1 (en) * | 1974-12-24 | 1982-07-07 | Калининградский Завод "Стройдормаш" | Road roller |
| SU937680A1 (en) * | 1978-02-08 | 1982-06-23 | Научно-Исследовательский Институт Строительных Конструкций | Apparatus for moulding concrete articles |
| SU1395726A1 (en) * | 1986-10-27 | 1988-05-15 | Калининский политехнический институт | Road roller |
| RU2225909C1 (en) * | 2002-10-29 | 2004-03-20 | Деникин Эрнст Иванович | Road roller with vacuum chamber |
| CN102587264A (en) * | 2012-02-29 | 2012-07-18 | 长安大学 | Bituminous pavement vacuum road roller and pavement compaction method thereof |
| CN104527823A (en) * | 2014-12-12 | 2015-04-22 | 长安大学 | Sealing structure for vacuum compaction road roller |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110593057A (en) * | 2019-08-26 | 2019-12-20 | 广东博智林机器人有限公司 | Floating robot |
| CN114232419A (en) * | 2022-01-11 | 2022-03-25 | 泉森建设(福建)有限公司 | Paver for municipal engineering construction and working method thereof |
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