CN202500074U - Asphalt pavement vacuum road roller - Google Patents
Asphalt pavement vacuum road roller Download PDFInfo
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- CN202500074U CN202500074U CN2012200714578U CN201220071457U CN202500074U CN 202500074 U CN202500074 U CN 202500074U CN 2012200714578 U CN2012200714578 U CN 2012200714578U CN 201220071457 U CN201220071457 U CN 201220071457U CN 202500074 U CN202500074 U CN 202500074U
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- vacuum chamber
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- road roller
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Abstract
The utility model discloses an asphalt pavement vacuum road roller. The asphalt pavement vacuum road roller comprises a road roller, a control plate and a vacuum chamber, wherein the vacuum chamber is mounted below a frame through a lifting oil cylinder for the vacuum chamber; the vacuum chamber comprises a support of the vacuum chamber, an upper sealing ring and a lower sealing ring; the lower edge of the support of the vacuum chamber is connected with the upper sealing ring, and the lower edge of the upper sealing ring is connected with the lower sealing ring; a rolling wheel is mounted in the vacuum chamber, the rolling wheel is connected with the support of the rolling wheel, and the support of the rolling wheel is connected with a regulating oil cylinder through a connecting rod; the vacuum chamber is connected with a vacuum pump, a temperature sensor and a vacuum degree sensor are mounted on the vacuum chamber, and a speed sensor is mounted in the position of a wheel shaft of the rolling wheel; and the lifting oil cylinder for the vacuum chamber, the regulating oil cylinder, the temperature sensor, the vacuum degree sensor and the speed sensor are connected to the control plate. The asphalt pavement vacuum road roller disclosed by the utility model can compact an asphalt pavement under vacuum conditions, improve the deformation efficiency of the asphalt pavement after rolling, save manpower and physical resources and significantly improve productivity.
Description
Technical field
The utility model belongs to the construction of the highway field, is specifically related to a kind of flexible pavement vacuum road roller.
Background technology
Because the intrinsic many superperformances of asphalt concrete pavement, the high-grade highway of our times various countries adopts flexible pavement mostly.Generally, the porosity of asphalt concrete pavement is 3～5%, still exists the leeway of minimizing.As everyone knows, the ground pressure of roller drum should be near the strength limit of compacting material, but should not surpass it, preferably 0.8～0.9 of strength limit times.Therefore, rely on increase road roller quality or linear pressure to come the method for strengthen compaction process to be restricted.
Compacting is to make the process of being pressed material raising degree of compaction through applying external force.The compacting process of paver is to being pressed material to load, overcome the frictional force between solid particle, adhesion strength in the loose heterogeneous material, get rid of air and moisture between solid particle, make each particle be subjected to displacement, adjacent to each other.Paver is after compacting, and degree of compaction increases.First necessary condition of compacting is to make to be pressed the particle of material to arrange again; Apply necessary outer force and work; To overcome its internal drag; Make particle that relative slippage take place, second necessary condition of compacting pressed material in compacting process, to keep essential rock-steady structure and " flowing " do not taken place under external force.
The three-phase system that bituminous mixture is made up of gas phase (air), liquid phase (pitch) and solid phase (gathering materials).Its compacting process mainly is the loading of the bituminous mixture that has paved being carried out certain form by some compacting equipments; Overcome internal friction, the cohesion of bituminous mixture; Size is gathered materials be subjected to displacement and adjacent to each other; Reduce the space through discharging internal gas, thereby make bituminous mixture generation plastic strain and closely knit.In this process, the bituminous mixture state changes, and progressively carries out the transition to high-tensile adhesive aggregation attitude from loose, plastic state.The essence of compacting is to remove gas phase, makes liquid phase and solid phase take place to arrange and the void content minimizing again.
At present, flexible pavement compacting compacting equipment commonly used mainly contains: quiet effect steel roller (smooth-wheeled roller), double-steel wheeled vibratory roller (series connection vibratory roller), rubber-tyred roller etc.Novel compacting equipments such as oscillatory roller, dither road roller and intelligent roller had appearred in recent years.
Quiet effect steel roller mainly is to make it plastic strain take place, air " is extruded " and closely knit to the bituminous mixture weight application.But quiet effect steel roller is the lower compacting equipment of a kind of efficient, and it is bigger to improve the degree of compaction energy consumption by gaining in weight, and quiet active force can only make to gather materials less relative slippage takes place, and the bituminous mixture plastic strain is less, only " extrudes " few part air.
Double-steel wheeled vibratory roller can effectively solve the lower problem of quiet effect steel roller efficient; But because two circular steel wheels contact for " line " with bituminous mixture; This is with regard to making that compaction force is big and action time is shorter; Before wheel, form pusher on the one hand, the wheel back produces resilience and micro-crack on the other hand.Resilience has reduced compacting efficient, and round steel wheel and bituminous mixture line contact action time are shorter, is difficult to guarantee that air " extrudes " time, and air " is extruded " not thorough.
Therefore, studying a kind of effective and flexible pavement road roller that efficient is high is very to be necessary.
Summary of the invention
Defective or deficiency to above-mentioned prior art existence; The purpose of the utility model is; A kind of flexible pavement vacuum road roller is provided, and the utility model carries out compacting to flexible pavement under vacuum condition, has improved the distortion efficient of the flexible pavement after rolling; Saved manpower and materials, productivity ratio is significantly improved.
A kind of flexible pavement vacuum road roller comprises road roller, it is characterized in that, also comprises the control panel and the vacuum chamber between front-wheel and trailing wheel that are installed in the driver's cabin, and vacuum chamber is installed in the below of frame through two vacuum chamber elevating rams;
Vacuum chamber comprises the vacuum chamber support, goes up sealing ring and lower seal, and wherein, the vacuum chamber support is the cuboid of the hollow of bottom-open, and the rear and front end of vacuum chamber support all is connected to frame through the vacuum chamber elevating ram; The lower edge of vacuum chamber support connects goes up sealing ring, and the lower edge of last sealing ring connects lower seal; The lower edge of the lower edge of lower seal and front-wheel, trailing wheel is in same horizontal plane;
Rolling wheel is installed in the vacuum chamber, and the width of rolling wheel is identical with front-wheel; The wheel shaft two ends of rolling wheel all connect the rolling wheel support, and the piston in the adjusting oil cylinder of the connecting rod of this rolling wheel support through passing the vacuum chamber support and vacuum chamber support top is connected, and the vacuum chamber support welds with the shell of regulating oil cylinder; Seal through sealing ring between connecting rod and vacuum chamber and the adjusting oil cylinder; Vacuum chamber connects vacuum pump, and vacuum pump is fixed on the frame; Temperature pick up and vacuum sensor are installed on the vacuum chamber, and the wheel shaft place of rolling wheel is equipped with velocity sensor;
Vacuum chamber elevating ram, adjusting oil cylinder, temperature pick up, vacuum sensor and velocity sensor all are connected to control panel.
The utility model also comprises following other technologies characteristic:
The said width up and down of going up sealing ring is 25-50mm; The width up and down of lower seal is 20-25mm.
The said material of going up sealing ring adopts spring sealed circle.
Said front-wheel adopts quiet steel wheel, and rolling wheel adopts the small-sized steel wheel that rolls, and trailing wheel adopts row rubber tyre arranged side by side.
The characteristics and the beneficial effect of the utility model are following:
1, mulberry has increased vacuum chamber to the utility model on common road roller airport, and vacuum condition helps the improvement of concrete inner structure, for condition has all been created in the minimizing of bituminous mixture mesopore rate quantity and size; The atmospheric pressure of vacuum chamber external surface and indoor vacuum pressure are poor, have applied additonal pressure through vacuum chamber and lower seal to the road surface, and this pressure changes with the variation of vacuum chamber pressure.This is in the pavement compaction, and according to the ground pressure of adjusting rollers such as bituminous concrete temperature, material behavior, compacting counting, improving compacting efficient provides convenience.
2, temperature pick up, velocity sensor and vacuum sensor are housed on the vacuum chamber, and control panel is housed in driver's cabin; The driver can be according to the travel speed of the test result adjustment road roller that is presented at vacuum interior temperature and vacuum on the control panel and the work of vacuum pump.
3, on vacuum chamber, adopt double-deck adjustment sealing ring, its upper strata is that large deformation can take place spring sealed circle, and lower floor is a General Purpose Rubber sealing ring generation small deformation; Two sealing rings are worked to adapt to the needs of road surface deformation of unevenness simultaneously.
4, vacuum chamber directly is connected on the frame of road roller by two vacuum chamber elevating rams; Regulate oil cylinder because fine setting vacuum chamber height is controlled the suitable deflection of lower seal, make atmospheric pressure be unlikely to excessive via the pressure that lower seal directly affacts on the road surface.
The compacting of common road roller road pavement is to carry out 1～2 time first pressing with quiet steel roller earlier, and 4～6 times multiple pressures are carried out final pressure 1～2 time with the rubber wheel road roller again, therefore needs to adopt at least 3 kinds of road rollers to repeat in order to roll; Because adopting, the front-wheel of the utility model rolls steel wheel; Rolling wheel is adopted at the middle part in vacuum chamber; Trailing wheel adopts rubber wheel; Therefore, only need use the flexible pavement vacuum road roller of a playscript with stage directions utility model, and roll the quality that can reach identical for 3～4 times with the flexible pavement vacuum debulk method of the utility model.Learn through test, compare with traditional road roller that the distortion efficient of the flexible pavement after the utility model rolls improves, and has saved manpower and materials, productivity ratio is significantly improved.
Description of drawings
Fig. 1 is the structural representation of the flexible pavement vacuum road roller of the utility model.
Fig. 2 is the asphalt pavement structure distortion sketch map of job site test.Wherein, left figure is the flexible pavement that adopts after the vacuum road roller compacting of the utility model; Right figure is the flexible pavement after the common road roller compacting of employing.
Fig. 3 is under vacuum state and the antivacuum state deflection comparison diagram that the bituminous mixture sample is compacted.
Below through the accompanying drawing and the specific embodiment the utility model is further explained.
The specific embodiment
As shown in Figure 1; The flexible pavement vacuum road roller of the utility model; Comprise road roller that a Daepori is logical and at the front-wheel and the vacuum chamber between the trailing wheel 3 of this road roller; Vacuum chamber 3 is installed in the below of the frame of road roller through two vacuum chamber elevating rams 4, and vacuum chamber elevating ram 4 is used to regulate the up-down of vacuum chamber 3;
The road roller of the utility model also comprises the control panel 16 that is installed in the road roller driver's cabin; Control panel 16 comprises instrument board and control button; Control panel 16 is used to show the data of each sensor acquisition, and is used to control each sensor and vacuum chamber elevating ram 4 and 11 unlatchings of adjusting oil cylinder;
Vacuum chamber elevating ram 4, adjusting oil cylinder 11, temperature pick up 14, vacuum sensor 15 and velocity sensor 17 all are connected to control panel 16; The driver checks the data that temperature pick up 14, vacuum sensor 15 and velocity sensor 17 are gathered through control panel 16, through control panel 16 control vacuum chamber elevating rams 4 and the duty of regulating oil cylinder 11.
Front-wheel 1 adopts quiet steel wheel, and rolling wheel 8 adopts the small-sized steel wheel that rolls, and trailing wheel 2 adopts row rubber tyre arranged side by side.
When the flexible pavement vacuum road roller of application the utility model carries out work; At first accomplish the construction of road foundation and basic unit by conventional method; Asphalt surface course paves on the surface of roadbase; Use the flexible pavement vacuum road roller of the utility model to carry out compacting in zone, compacting road surface immediately, concrete steps are following:
Start vacuum chamber elevating ram 4 vacuum chamber 3 is descended, contact with ground until lower seal 7; Start to regulate the height of 11 pairs of vacuum chambers 3 of oil cylinder then and finely tune,, form an airtight working chamber this moment between vacuum chamber 3 and the flexible pavement until the 8～10mm that is deformed into of the lower seal 7 of vacuum chamber 3 bottoms; The driver opens temperature pick up 14, velocity sensor 17 and vacuum sensor 15 through control panel 16, in real time the travel speed of temperature, vacuum and the road roller in the collecting work chamber; When temperature was 100～120 ℃, the driver opened 13 pairs of working chambers of vacuum pump and vacuumizes, and vacuum chamber 3 internal pressures are 0～-during 0.1MP, the driver drives the speed of road roller with 3～5km/h; Because the best compacting temperature of bituminous mixture is at 100～120 ℃ when adopting vacuum debulk, so asphalt surface course paves and carries out vacuum debulk when finishing immediately; When needing to shut down in the road roller driving process, vacuum chamber 3 internal pressures are adjusted to-0.035MP; This is to be destroyed for fear of the excessive compacting road surface that causes of the vacuum pressure on local road surface; Pavement construction is closed vacuum pump 13, velocity sensor 17, vacuum sensor 15 and temperature pick up 14 after accomplishing, and adjustment vacuum chamber elevating ram 4 makes vacuum chamber break away from the road surface.
The utility model designs according to the basic demand of the closely knit needs discharge of bituminous mixture inner air fully; On the one hand; Realize that through vacuum chamber the bituminous mixture internal gas initiatively overflows, destroy stable dynamic balance between bituminous mixture original gas phase, liquid phase and solid phase, eliminate " gas spring " effect (when being compacted to a certain degree; Free gas becomes seldom; Be left to be difficult to overflow the confining gas that is present in the hole of remaining silent, these great amount of bubbles by the pitch parcel have formed a considerable number of " gas spring "), for compacting creates favorable conditions; On the other hand; Vacuum pressure difference in the atmospheric pressure of vacuum chamber external surface and the vacuum chamber acts on the bituminous mixture surface through rolling wheel; Form effective compaction force, all be used to overcome the internal friction and the cohesion of bituminous mixture, mutual slippage, interlocking take place and are closely knit in liquid phase and solid phase.
In addition, compare with traditional in the past road roller, the utility model has been jumped out the thinking of " improving the bituminous mixture initial temperature for guaranteeing to roll temperature ", reduces compacting counting through improving compacting efficient, thereby shortens temperature fall time, guarantee to roll temperature.Promptly because vacuum debulk efficient is higher than common debulking methods, though cooling rate is fast, the compacting time short (temperature fall time is short), natural energy guarantees to roll temperature.
As shown in Figure 2; In order to verify the effect of the utility model; It is on-the-spot to choose certain asphalt pavement construction, confirms two identical compacting flexible pavement zones respectively, and road roller of employing the utility model and debulking methods and traditional road roller carry out compacting to flexible pavement.When adopting common road roller to roll, carry out 2 times first pressing with steel roller earlier, 4 times multiple pressures are carried out final pressure 2 times with the rubber wheel road roller again; The road roller of employing the utility model has carried out 3 times and has rolled; Afterwards, use GB50092-96 " Code for constrution and acceptance of asphat pavement " that the flexible pavement after the compacting is tested respectively.Wherein, left side figure is the flexible pavement of the utility model compacting, and through measuring, the hole in the flexible pavement is less than 0.015mm, and right figure is the consolidation effect of common road roller, and through measuring, the hole in the flexible pavement reaches 0.3mm; And consolidation effect only can obviously be found out from figure.This presentation of results under vacuum condition, adopts the method for the utility model that flexible pavement is carried out compacting, has not only reduced road roller quantity, has reduced compacting counting simultaneously, finally can also reach better consolidation effect.
As shown in Figure 3, in the laboratory, asphalt sample is carried out vacuum debulk test, compare with the compaction test of antivacuum state, the bituminous mixture rate of deformation is bigger during the vacuum load that records, and the accumulative total deflection is big.
Claims (4)
1. flexible pavement vacuum road roller; Comprise road roller; It is characterized in that, also comprise be installed in the control panel (16) in the driver's cabin and be positioned at front-wheel (1) and trailing wheel (2) between vacuum chamber (3), vacuum chamber (3) is installed in the below of frame through two vacuum chamber elevating rams (4);
Vacuum chamber (3) comprises vacuum chamber support (5), goes up sealing ring (6) and lower seal (7), and wherein, vacuum chamber support (5) is the hollow cuboid of bottom-open, and the rear and front end of vacuum chamber support (5) all is connected to frame through vacuum chamber elevating ram (4); The lower edge of vacuum chamber support (5) connects goes up sealing ring (6), and the lower edge of last sealing ring (6) connects lower seal (7); The lower edge of the lower edge of lower seal (7) and front-wheel (1), trailing wheel (2) is in same horizontal plane;
Rolling wheel (8) is installed in the vacuum chamber (3), and the width of rolling wheel (8) is identical with front-wheel; The wheel shaft two ends of rolling wheel (8) all connect rolling wheel support (9); Piston in the adjusting oil cylinder (11) of the connecting rod (10) of this rolling wheel support (9) through passing vacuum chamber support (5) and vacuum chamber support (5) top is connected, and vacuum chamber support (5) welds with the shell of regulating oil cylinder (11); Seal through sealing ring (12) between connecting rod (10) and vacuum chamber (3) and the adjusting oil cylinder (11);
Vacuum chamber (3) connects vacuum pump (13), and vacuum pump (13) is fixed on the frame; Temperature pick up (14) and vacuum sensor (15) are installed on the vacuum chamber (3), and the wheel shaft place of rolling wheel (8) is equipped with velocity sensor (17);
Vacuum chamber elevating ram (4), adjusting oil cylinder (11), temperature pick up (14), vacuum sensor (15) and velocity sensor (17) all are connected to control panel (16).
2. a kind of flexible pavement vacuum road roller as claimed in claim 1 is characterized in that, the said width up and down of going up sealing ring (6) is 25-50mm; The width up and down of lower seal (7) is 20-25mm.
3. a kind of flexible pavement vacuum road roller as claimed in claim 1 is characterized in that, the said material of going up sealing ring (6) adopts spring sealed circle.
4. a kind of flexible pavement vacuum road roller as claimed in claim 1 is characterized in that said front-wheel (1) adopts quiet steel wheel, and rolling wheel (8) adopts the small-sized steel wheel that rolls, and trailing wheel (2) adopts row rubber tyre arranged side by side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200714578U CN202500074U (en) | 2012-02-29 | 2012-02-29 | Asphalt pavement vacuum road roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200714578U CN202500074U (en) | 2012-02-29 | 2012-02-29 | Asphalt pavement vacuum road roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202500074U true CN202500074U (en) | 2012-10-24 |
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ID=47036690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200714578U Expired - Fee Related CN202500074U (en) | 2012-02-29 | 2012-02-29 | Asphalt pavement vacuum road roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202500074U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587264A (en) * | 2012-02-29 | 2012-07-18 | 长安大学 | Bituminous pavement vacuum road roller and pavement compaction method thereof |
-
2012
- 2012-02-29 CN CN2012200714578U patent/CN202500074U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587264A (en) * | 2012-02-29 | 2012-07-18 | 长安大学 | Bituminous pavement vacuum road roller and pavement compaction method thereof |
| CN102587264B (en) * | 2012-02-29 | 2014-06-18 | 长安大学 | Bituminous pavement vacuum road roller and pavement compaction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121024 Termination date: 20140229 |