CN108316098A - It is a kind of that there is heating and nozzle height the bituminous distributor of function is adjusted - Google Patents
It is a kind of that there is heating and nozzle height the bituminous distributor of function is adjusted Download PDFInfo
- Publication number
- CN108316098A CN108316098A CN201810370500.2A CN201810370500A CN108316098A CN 108316098 A CN108316098 A CN 108316098A CN 201810370500 A CN201810370500 A CN 201810370500A CN 108316098 A CN108316098 A CN 108316098A
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- heating
- storage tank
- rack
- nozzle
- motor
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/16—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
- E01C19/17—Application by spraying or throwing
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses a kind of there is heating and nozzle height the bituminous distributor of function is adjusted, including rack, the upper surface of the rack is provided with storage tank, it is provided with heating device on the storage tank, the heating device includes electrical heating head, heating tube and heat-conducting plate, it is connected with heating tube on the left of the electrical heating head, the heat-conducting plate is set to the top of heating tube, it is provided with transmitting device on the right side of the storage tank, the distributing device includes first motor, angular wheel, lead screw, support column, nut slider, spread bar, nozzle and hose, the output shaft of the first motor is connect by angular wheel with screw rod transmission, spread bar is connected on the right side of the nut slider, the lower surface of the spread bar is provided with nozzle.Invention increases heating devices, and the temperature of pitch is made to be maintained in normal operating range, realize nozzle height adjusting, improve the efficiency and quality of spread, increase service life of equipment.
Description
Technical field
The invention belongs to technical field of buildings, and in particular to a kind of that there is heating and nozzle height the pitch of function is adjusted
Spreading machine.
Background technology
The dark brown complex mixture that pitch is made of the hydrocarbon and its non metallic derivatives of different molecular weight,
When high viscosity organic liquid one kind, be in a liquid state, surface be in black, dissolve in carbon disulfide.Pitch be it is a kind of waterproof and dampproof and
Corrosion-resistant organic cementitious material.Bitumen is then to be stored at underground, some formation ore beds or the accumulation of earth's crust surface.Pitch is main
For the industry such as coating, plastics, rubber and surfacing etc..Bituminous paving refers to the incorporation bitumen for road use material in mineral material
Expect various types of road surfaces of making.
Bituminous distributor is a kind of dark-coloured pavement machinery, and bituminous penetration pavement is real, flat in metalling decking and rolling secret
It is whole uniformly after, clean up on surface, keep being dispensed while hot with bituminous distributor sprinkling first pass pitch in dry base
After forward chats uniform fold, then by bituminous distributor second time pitch of sprinkling, until sprinkling cover pitch forms road surface.Pitch is spilt
Cloth machine is during the work time it has to be ensured that the temperature of pitch will not reduce, when the temperature reduction of pitch is that the viscosity of pitch is just
It can increase, influence the quality of spread, it is also possible to block spread machine nozzle, the height of spread machine nozzle can influence the face of spread
Product, quality and overlapping range, the highly desirable of nozzle is accurately adjusted during spread, to adapt to different spreads
Situation.But traditional bituminous distributor is at work, the temperature of pitch can be reduced slowly, and the viscosity of pitch slowly increases, spray
The height of mouth is fixed, and the quality of spread is influenced, and efficiency is slow, easily spreading machine is caused to damage.Therefore, it is proposed that it is a kind of have plus
The bituminous distributor of function is adjusted in heat and nozzle height.
Invention content
The purpose of the present invention is to provide a kind of there is heating and nozzle height the bituminous distributor of function is adjusted, with solution
It is proposed that spreading machine is at work in the prior art in certainly above-mentioned background technology, the temperature of pitch can be reduced slowly, the viscosity of pitch
Slowly increase, the height of nozzle is fixed, and the quality of spread is influenced, and efficiency is slow, the problem of easily spreading machine being caused to damage.
To achieve the above object, present invention employs following technical solutions：
It is a kind of that there is heating and nozzle height the bituminous distributor of function, including rack, the upper table of the rack is adjusted
Face is provided with storage tank, and heating device is provided on the storage tank, and the heating device includes electrical heating head, heating tube and leads
Hot plate, the electrical heating head are fixedly installed in storage tank right side lower part, heating tube are connected on the left of the electrical heating head, and add
Heat pipe is set to bottom in storage tank, and the heat-conducting plate is set to the top of heating tube, and four sides of heat-conducting plate are fixedly installed in
On the inner wall of storage tank surrounding, it is provided with transmitting device on the right side of the storage tank, is fixedly connected on the right side of the transmitting device
Distributing device, the distributing device include first motor, angular wheel, lead screw, support column, nut slider, spread bar, nozzle and
Hose, the first motor are installed on rack upper surface right end, and the output shaft of the first motor passes through angular wheel and lead screw
It is sequentially connected, the lead screw is installed on support column, and the support column is set to the right side of rack, is arranged on the lead screw
Nut slider is connected to spread bar on the right side of the nut slider, and the lower surface of the spread bar is provided with nozzle, the nozzle
It is connected with one end of hose, the other end of the hose is connected with transmitting device, the both sides setting of the rack lower surface
There is traveling wheel.
Preferably, heating tube structure in the shape of a spiral.
Preferably, hydraulically extensible supporting leg is provided on the left of the rack lower surface, the hydraulically extensible supporting leg includes liquid
The pedestal of cylinder pressure, piston rod and support plate, the hydraulic cylinder is fixedly installed in the lower surface of rack, is provided in the hydraulic cylinder
Piston rod, the piston rod lower surface are provided with support plate.
Preferably, it is provided with feed inlet on the left of the upper surface of the storage tank.
Preferably, the transmitting device includes delivery pipe, solenoid electric valve, pneumatic diaphragm pump and flow sensor, described
Delivery pipe both ends connect with one end of storage tank right side and hose communicate respectively, are installed successively from left to right in the delivery pipe
There are solenoid electric valve, pneumatic diaphragm pump and flow sensor.
Preferably, be provided with agitating device at the top of the storage tank, the agitating device include the second motor, roll shaft and
Paddle, second motor are set to the upper surface of storage tank, roll shaft are installed on the output shaft of second motor,
And roll shaft is vertically inserted in storage tank, the outer surface of the roll shaft is preferred, and asbestos are provided on the inner wall of the storage tank
Thermal insulation layer.
Preferably, the rack left side is provided with Y type draw bars.
The technique effect and advantage of the present invention：A kind of Garden Architecture proposed by the present invention afforests waste treatment apparatus, with
The prior art is compared, and is had the following advantages：
1, by the electrical heating head on the right side of storage tank give heating tube heat, heating tube give heat-conducting plate heating, to reach to
Pitch heating in storage tank, keeps asphalt temperature and pitch viscosity, keeps pitch sprinkling smooth, does not easily cause delivery pipe and nozzle
Blocking, increase working efficiency；
2, lead screw rotation is driven by first motor, to drive moving up and down for lead screw top nut sliding block, nut slider
Moving up and down for spread bar is driven, spread bar has driven moving up and down for nozzle, improves spraying quality, and more accurately control is spilt
Cloth range and quality；
3, by rotation of second motor with action roller shaft, roll shaft drives the rotation of paddle, can increase drip in storage tank
Green flowing, prevents asphalt solidification, ensure that the transmission of pitch uses, increases efficiency.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the schematic cross-sectional view of the present invention；
Fig. 3 is the schematic top plan view of the present invention；
Fig. 4 is the distributing device schematic cross-sectional view of the present invention.
In figure：1 rack, 2 storage tanks, 3 heating devices, 301 electrical heating heads, 302 heating tubes, 303 heat-conducting plates, 4 transmission dresses
Set, 401 delivery pipes, 402 solenoid electric valves, 403 pneumatic diaphragm pumps, 404 flow sensors, 5 distributing devices, 501 first motors,
502 angular wheels, 503 lead screws, 504 support columns, 505 nut sliders, 507 nozzles, 508 hoses, 6 traveling wheels, 7 hydraulically extensible branch
Leg, 701 hydraulic cylinders, 702 piston rods, 703 support plates, 8 feed inlets, 9 agitating devices, 901 second motors, 902 roll shafts, 903 are stirred
Mix leaf, 10 insulating layer of asbestos, 11Y type draw bars.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Herein
Described specific embodiment is only used to explain the present invention, is not intended to limit the present invention.Based on the embodiments of the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this hair
The range of bright protection.
The present invention provides a kind of pitch sprinklings with heating and the adjustable function of nozzle height as shown in Figs 1-4
The upper surface of machine, including rack 1, the rack 1 is provided with storage tank 2, and heating device 3 is provided on the storage tank 2, described
Heating device 3 includes electrical heating head 301, heating tube 302 and heat-conducting plate 303, and the electrical heating head 301 is fixedly installed in storage tank
2 right sides lower part, 301 left side of the electrical heating head is connected with heating tube 302, and heating tube 302 is set to bottom in storage tank 2
Portion, the heat-conducting plate 303 is set to the top of heating tube 302, and four sides of heat-conducting plate 303 are fixedly installed in 2 surrounding of storage tank
Inner wall on, heat-conducting plate 303 is metal heat-conducting plate, and heat-conducting plate 303 can prevent Asphalt Contactor heating tube 302 so as to cause heating
Pipe 302 is easily damaged, and heating tube 302 is heated to heat-conducting plate 303 to which to the pitch heating in storage tank 2, the storage tank 2 is right
Side is provided with transmitting device 4, and the right side of the transmitting device 4 is fixedly connected with distributing device 5, and the distributing device 5 includes the
One motor 501, angular wheel 502, lead screw 503, support column 504, nut slider 505, spread bar 506, nozzle 507 and hose
508, the first motor 501 is installed on 1 upper surface right end of rack, and the output shaft of the first motor 501 passes through angular wheel
502 are sequentially connected with lead screw 503, and the lead screw 503 is installed on support column 504, and the support column 504 is set to rack 1
Right side is arranged with nut slider 505 on the lead screw 503, and the right side of the nut slider 505 is connected to spread bar 506, institute
The lower surface for stating spread bar 506 is provided with nozzle 507, and the nozzle 507 is connected with one end of hose 508, the hose 508
The other end be connected with transmitting device 4, by first motor 501 drive lead screw 503 rotation, make about 505 nut slider
Movement can drive moving up and down for spread bar 506, to have adjusted the height of nozzle 507, improve spraying quality, more precisely
Control spread range and quality, the both sides of 1 lower surface of the rack are provided with traveling wheel 6.
Preferably, the structure in the shape of a spiral of the heating tube 302.
By using above-mentioned technical proposal, the heating tube 302 of helicoidal structure can accelerate heating rate, convenient for storage tank
Asphalt stock in 2 quickly heats.
Preferably, being provided with hydraulically extensible supporting leg 7 on the left of 1 lower surface of the rack, the hydraulically extensible supporting leg 7 includes
Hydraulic cylinder 701, piston rod 702 and support plate 703, the pedestal of the hydraulic cylinder 701 are fixedly installed in the lower surface of rack 1, institute
It states and is provided with piston rod 702 in hydraulic cylinder 701,702 lower surface of the piston rod is provided with support plate 703.
By using above-mentioned technical proposal, hydraulically extensible supporting leg 7 passes through the flexible of piston rod 702, drives support plate 703
Move up and down, can be used cooperatively with traveling wheel 6, rack 1 is made to place steadily.
Preferably, being provided with feed inlet 8 on the left of the upper surface of the storage tank 2.
By using above-mentioned technical proposal, feed inlet 8 is convenient for feeding to storage tank 2, can simultaneously feed in operation, real
It now works continuously, increases working efficiency.
It is passed preferably, the transmitting device 4 includes delivery pipe 401, solenoid electric valve 402, pneumatic diaphragm pump 403 and flow
Sensor 404,401 both ends of the delivery pipe connect with one end of 2 right side of storage tank and hose 508 communicate respectively, the conveying
Solenoid electric valve 402, pneumatic diaphragm pump 403 and flow sensor 404 are sequentially installed on pipe 401 from left to right.
By using above-mentioned technical proposal, pitch is pumped by delivery pipe 401 by pneumatic diaphragm pump 403, then pass through conveying
Pipe 401, which flows into hose 508, reaches the ejection of nozzle 507, and solenoid electric valve 402 can control the flowing of pitch, flow sensor
404 it can be seen that pitch sprinkling amount.
Preferably, the top of the storage tank 2 is provided with agitating device 9, the agitating device 9 include the second motor 901,
Roll shaft 902 and paddle 903, second motor 901 are set to the upper surface of storage tank 2, the output of second motor 901
Roll shaft 902 is installed on axis, and roll shaft 902 is vertically inserted in storage tank 2, the outer surface of the roll shaft 902 is at least set
It is equipped with four groups of paddles 903.
The drive of roll shaft 902 is set to stir by the second rotation of the motor 901 with action roller shaft 902 by using above-mentioned technical proposal
The rotation of leaf 903 is mixed, the flowing of pitch in storage tank 2 can be increased, prevent asphalt solidification, ensure that the transmission of pitch, is increased
Efficiency.
Preferably, being provided with insulating layer of asbestos 10 on the inner wall of the storage tank 2.
By using above-mentioned technical proposal, insulating layer of asbestos 10 makes the reduction of the asphalt temperature in storage tank 2 slow down, to subtract
The slow solidification of pitch, increases Use Limitation.
Preferably, 1 left side of the rack is provided with Y types draw bar 11.
By using above-mentioned technical proposal, Y types draw bar 11 is convenient to be assembled with driving machinery, coordinates 6 side of traveling wheel
To the tethered sliding of spreading machine.
Operation principle：In use, asphalt stock is injected by feed inlet 8, pass through the electrical heating head on 2 right side of storage tank
301 heat to heating tube 302, and heating tube 302 is heated to heat-conducting plate 303, to the asphalt stock heating in storage tank 2, protect
The temperature for holding asphalt stock makes roll shaft 902 drive turning for paddle 903 by the second rotation of the motor 901 with action roller shaft 902
It is dynamic, the flowing of pitch in storage tank 2 can be increased, prevent asphalt solidification, pneumatic diaphragm pump 403 is opened and pitch is pumped into delivery pipe
401, it is flowed into hose 508 by delivery pipe 401 and reaches the ejection of nozzle 507, then pass through first motor 501 and drive 503 turns of lead screw
It is dynamic, to drive moving up and down for 503 top nut sliding block 505 of lead screw, make nut slider 505 drive spread bar 506 on move down
Dynamic, spread bar 506 has driven moving up and down for nozzle 507, improves spraying quality, more accurately controls spread range and matter
Amount.
Finally it should be noted that：The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's
Within protection domain.
Claims (8)
1. a kind of there is heating and nozzle height the bituminous distributor of function, including rack (1) is adjusted, it is characterised in that：Institute
The upper surface for stating rack (1) is provided with storage tank (2), and heating device (3), the heating dress are provided on the storage tank (2)
It includes electrical heating head (301), heating tube (302) and heat-conducting plate (303) to set (3), and the electrical heating head (301) is fixedly installed in storage
Batch can (2) right side lower part, electrical heating head (301) left side is connected with heating tube (302), and heating tube (302) is set to
Storage tank (2) interior bottom, the heat-conducting plate (303) is set to the top of heating tube (302), and four sides of heat-conducting plate (303) are solid
On inner wall of the Dingan County loaded on storage tank ((2)) surrounding, transmitting device (4), the transmission dress are provided on the right side of the storage tank (2)
It sets and is fixedly connected with distributing device (5) on the right side of (4), the distributing device (5) includes first motor (501), angular wheel
(502), lead screw (503), support column (504), nut slider (505), spread bar (506), nozzle (507) and hose (508), institute
It states first motor (501) and is installed on rack (1) upper surface right end, the output shaft of the first motor (501) passes through angular wheel
(502) it is sequentially connected with lead screw (503), the lead screw (503) is installed on support column (504), support column (504) setting
Right side in rack (1) is arranged with nut slider (505), the right side of the nut slider (505) on the lead screw (503)
It is connected to spread bar (506), the lower surface of the spread bar (506) is provided with nozzle (507), the nozzle (507) and hose
(508) one end is connected, and the other end of the hose (508) is connected with transmitting device (4), rack (1) lower surface
Both sides be provided with traveling wheel (6).
2. a kind of bituminous distributor with heating and the adjustable function of nozzle height according to claim 1, feature
It is：The heating tube (302) structure in the shape of a spiral.
3. a kind of bituminous distributor with heating and the adjustable function of nozzle height according to claim 1, feature
It is：Hydraulically extensible supporting leg (7) is provided on the left of rack (1) lower surface, the hydraulically extensible supporting leg (7) includes hydraulic pressure
The pedestal of cylinder (701), piston rod (702) and support plate (703), the hydraulic cylinder (701) is fixedly installed in the following table of rack (1)
Face, the hydraulic cylinder (701) is interior to be provided with piston rod (702), and piston rod (702) lower surface is provided with support plate (703).
4. a kind of bituminous distributor with heating and the adjustable function of nozzle height according to claim 1, feature
It is：It is provided with feed inlet (8) on the left of the upper surface of the storage tank (2).
5. a kind of bituminous distributor with heating and the adjustable function of nozzle height according to claim 1, feature
It is：The transmitting device (4) includes delivery pipe (401), solenoid electric valve (402), pneumatic diaphragm pump (403) and flow sensing
Device (404), delivery pipe (401) both ends are connect with one end of storage tank (2) right side and hose (508) respectively to be communicated, institute
It states and is sequentially installed with solenoid electric valve (402), pneumatic diaphragm pump (403) and flow sensor in delivery pipe (401) from left to right
(404)。
6. a kind of bituminous distributor with heating and the adjustable function of nozzle height according to claim 1, feature
It is：Agitating device (9) is provided at the top of the storage tank (2), the agitating device (9) includes the second motor (901), roller
Axis (902) and paddle (903), second motor (901) are set to the upper surface of storage tank (2), second motor
(901) roll shaft (902) is installed on output shaft, and roll shaft (902) is vertically inserted in storage tank (2), the roll shaft
(902) outer surface is at least provided with four groups of paddles (903).
7. a kind of bituminous distributor with heating and the adjustable function of nozzle height according to claim 1, feature
It is：It is provided with insulating layer of asbestos (10) on the inner wall of the storage tank (2).
8. a kind of bituminous distributor with heating and the adjustable function of nozzle height according to claim 1, feature
It is：Rack (1) left side is provided with Y types draw bar (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810370500.2A CN108316098A (en) | 2018-04-24 | 2018-04-24 | It is a kind of that there is heating and nozzle height the bituminous distributor of function is adjusted |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810370500.2A CN108316098A (en) | 2018-04-24 | 2018-04-24 | It is a kind of that there is heating and nozzle height the bituminous distributor of function is adjusted |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108316098A true CN108316098A (en) | 2018-07-24 |
Family
ID=62895316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810370500.2A Pending CN108316098A (en) | 2018-04-24 | 2018-04-24 | It is a kind of that there is heating and nozzle height the bituminous distributor of function is adjusted |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108316098A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778656A (en) * | 2019-03-27 | 2019-05-21 | 北京城建远东建设投资集团有限公司 | Emulsified asphalt dispensing device |
| CN110144800A (en) * | 2019-06-05 | 2019-08-20 | 马亮 | A kind of highway engineering road surface prosthetic device |
| CN110746852A (en) * | 2019-10-31 | 2020-02-04 | 湖南合利来智慧显示科技有限公司 | Composite coating for LED screen and manufacturing method thereof |
| CN111851215A (en) * | 2020-07-27 | 2020-10-30 | 叶延森 | Asphalt laying device for construction engineering |
| CN112726332A (en) * | 2020-12-29 | 2021-04-30 | 冉隆权 | Rapid permeable asphalt spraying device for expressway and spraying method thereof |
| CN112982090A (en) * | 2021-04-25 | 2021-06-18 | 哈尔滨学院 | Photocatalytic oxidation pavement soil restoration spreading device |
| CN113550202A (en) * | 2021-08-31 | 2021-10-26 | 丁茂 | Pitch dispensing device is used in highway construction |
| CN113969529A (en) * | 2020-07-22 | 2022-01-25 | 深圳市卓宝科技股份有限公司 | Asphalt paving method |
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| FR324668A (en) * | 1902-09-16 | 1903-04-07 | Cassan Fils Louis Etienne | Tar ejector sprayer |
| CN103510447A (en) * | 2013-09-29 | 2014-01-15 | 张锡峰 | Asphalt dumping device |
| CN205839551U (en) * | 2016-07-04 | 2016-12-28 | 常山卫邦风机有限公司 | A kind of adjustable bituminous distributor of nozzle height |
| CN206944007U (en) * | 2017-07-07 | 2018-01-30 | 陈思冲 | A kind of road construction illuminating lamp Portable support |
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2018
- 2018-04-24 CN CN201810370500.2A patent/CN108316098A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR324668A (en) * | 1902-09-16 | 1903-04-07 | Cassan Fils Louis Etienne | Tar ejector sprayer |
| CN103510447A (en) * | 2013-09-29 | 2014-01-15 | 张锡峰 | Asphalt dumping device |
| CN205839551U (en) * | 2016-07-04 | 2016-12-28 | 常山卫邦风机有限公司 | A kind of adjustable bituminous distributor of nozzle height |
| CN206944007U (en) * | 2017-07-07 | 2018-01-30 | 陈思冲 | A kind of road construction illuminating lamp Portable support |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778656A (en) * | 2019-03-27 | 2019-05-21 | 北京城建远东建设投资集团有限公司 | Emulsified asphalt dispensing device |
| CN110144800A (en) * | 2019-06-05 | 2019-08-20 | 马亮 | A kind of highway engineering road surface prosthetic device |
| CN110746852A (en) * | 2019-10-31 | 2020-02-04 | 湖南合利来智慧显示科技有限公司 | Composite coating for LED screen and manufacturing method thereof |
| CN113969529A (en) * | 2020-07-22 | 2022-01-25 | 深圳市卓宝科技股份有限公司 | Asphalt paving method |
| CN111851215A (en) * | 2020-07-27 | 2020-10-30 | 叶延森 | Asphalt laying device for construction engineering |
| CN111851215B (en) * | 2020-07-27 | 2022-05-10 | 广州永越建筑工程有限公司 | Asphalt laying device for construction engineering |
| CN112726332A (en) * | 2020-12-29 | 2021-04-30 | 冉隆权 | Rapid permeable asphalt spraying device for expressway and spraying method thereof |
| CN112982090A (en) * | 2021-04-25 | 2021-06-18 | 哈尔滨学院 | Photocatalytic oxidation pavement soil restoration spreading device |
| CN113550202A (en) * | 2021-08-31 | 2021-10-26 | 丁茂 | Pitch dispensing device is used in highway construction |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180724 |
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| RJ01 | Rejection of invention patent application after publication |