CN110541366A - Highway engineering bridge construction bridge face concrete health preserving device - Google Patents

Highway engineering bridge construction bridge face concrete health preserving device Download PDF

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Publication number
CN110541366A
CN110541366A CN201910868647.9A CN201910868647A CN110541366A CN 110541366 A CN110541366 A CN 110541366A CN 201910868647 A CN201910868647 A CN 201910868647A CN 110541366 A CN110541366 A CN 110541366A
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CN
China
Prior art keywords
barrel
unit
rod
shaft
highway engineering
Prior art date
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Pending
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CN201910868647.9A
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Chinese (zh)
Inventor
韩四红
高源�
邢昌柱
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to CN201910868647.9A priority Critical patent/CN110541366A/en
Publication of CN110541366A publication Critical patent/CN110541366A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/24Safety or protective measures preventing damage to building parts or finishing work during construction

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention discloses a bridge deck concrete curing device for highway engineering bridge construction, which comprises a frame, a barrel and a spraying unit, wherein the top of the barrel is provided with a feed inlet, the bottom of the frame is uniformly and symmetrically provided with rollers, one side of the bottom of the barrel is connected with a main hose, a booster pump is arranged on the injection hose, the main hose is connected with a plurality of branch hoses through water pipe joints, the spraying unit is arranged on the barrel and comprises a scissor mechanism, a shell, a fan plate, a turntable, a swing rod and a spray head, the barrel is provided with a preparation unit for preparing a health-preserving liquid, the preparation unit comprises a first motor, a stirring shaft, a stirring rod and a spiral fan blade, the spraying unit is arranged, the bridge deck can be effectively sprayed with liquid for curing, waste or insufficient liquid can be avoided, the device is convenient and practical, the swing rod and the spray head at the bottom end of, the health preserving efficiency is improved; the preparation unit is arranged, so that the mixing speed is increased, and the preparation efficiency is improved.

Description

highway engineering bridge construction bridge face concrete health preserving device
Technical Field
The invention relates to the technical field of bridge construction equipment, in particular to a concrete curing device for a bridge deck in bridge construction of highway engineering.
Background
The concrete curing is to artificially create certain humidity and temperature conditions so that the just-cast concrete can be normal or the hardening and strength increase of the concrete are accelerated. Concrete is therefore able to harden and develop strength gradually as a result of the hydration of cement, which requires certain temperature and humidity conditions. If the surrounding environment does not have the condition, the concrete needs to be cured manually.
The defect that the water spray range of the existing concrete curing device in the bridge deck concrete water spray process cannot be adjusted exists, so that the water spray range cannot be reduced or increased according to the span size of the bridge deck, and the bridge deck concrete is inconvenient to be subjected to effective water spray curing and is used by inconvenient users.
Disclosure of Invention
The embodiment of the invention aims to provide a concrete curing device for a bridge deck in bridge construction of highway engineering to solve the problems.
In order to achieve the purpose, the invention provides the following technical scheme:
A concrete curing device for a bridge construction bridge surface of highway engineering comprises a frame, a barrel and a spraying unit, wherein a feed inlet is formed in the top of the barrel, idler wheels are uniformly and symmetrically installed at the bottom of the frame, one side of the bottom of the barrel is connected with a main hose, a booster pump is installed on the hose, the main hose is connected with a plurality of branch hoses through water pipe joints, the spraying unit is installed on the barrel and comprises a scissor mechanism, a shell, fan plates, a rotary plate, a swing rod and a spray head, the scissor mechanism is installed on the barrel, the hinged ends at the top of the scissor mechanism are hinged with swing rods, the spray head is installed at the bottom ends of the swing rods, the front end parts of hinge pins at the hinged ends at the bottom of the scissor mechanism are respectively provided with the rotary plate, pins are eccentrically and integrally arranged on the end surface of the rotary plate, through grooves for the pins to be inserted and moved, the fan plate is arranged in the shell, the shell is rotatably connected with the hinge pin shaft through a sealing bearing, the upper part of one side of the shell is connected with a partial hose, and the lower part of the other side of the shell is connected with the spray head through a connecting hose.
In one alternative: the rollers are self-locking rollers.
In one alternative: the frame comprises a bottom plate and a hand frame.
in one alternative: and a storage battery for supplying power is arranged on the rack.
In one alternative: install the preparation unit that is used for preparing health preserving liquid on the barrel, it includes first motor, (mixing) shaft, puddler and helical fan blade to prepare the unit, the eccentric rotation of (mixing) shaft is installed in the barrel, and first motor drive connects the (mixing) shaft, and first motor is installed in the barrel top, and from last down equidistance is fixed with a plurality of rod covers on the (mixing) shaft, wears to be equipped with the puddler in the rod cover, puddler and rod cover clearance fit, and the puddler both ends all contact with the barrel inner wall, and multi-disc helical fan blade is installed to puddler both ends symmetry.
In one alternative: universal pulleys are installed at two ends of the stirring rod and are in contact with the inner wall of the barrel.
In one alternative: the spraying device is characterized in that a lifting unit used for driving the spraying unit to lift is further arranged on the barrel, the lifting unit comprises a second motor, a screw rod and a movable plate, the screw rod is rotatably installed on the outer wall of the barrel, the screw rod is preferably rotatably connected with the outer wall of the barrel through a fixing plate and a bearing, the top end of the screw rod is fixedly connected with an output shaft of the second motor through a coupler, the movable plate is connected to the screw rod in a threaded mode, the movable plate is slidably connected with the outer wall of the barrel, and the spraying.
compared with the prior art, the embodiment of the invention has the following beneficial effects:
1. The spraying unit is arranged and comprises a shearing fork mechanism, a shell, a fan plate, a rotary table, a swing rod and a sprayer, the shearing fork mechanism is adjusted to extend or shorten according to different bridge deck widths, so that liquid spraying maintenance can be effectively carried out on the bridge deck, waste or insufficient liquid spraying is avoided, the spraying is convenient and practical, meanwhile, when the health-preserving liquid enters the branch hoses through the main hoses and then enters the shell to impact the fan plate to rotate, the fan plate drives the rotary table to rotate through the hinge pin shafts, the rotary table drives the pin to rotate, and the pin drives the swing rod and the sprayer at the bottom end of the swing rod to swing, so that the spraying range is expanded, the health-preserving liquid is sprayed more fully and uniformly;
2. Be equipped with and prepare the unit, it includes first motor to prepare the unit, (mixing) shaft, puddler and spiral flabellum, first motor drives the (mixing) shaft and rotates, the (mixing) shaft passes through the rod cover and drives the puddler and rotate, because (mixing) shaft eccentric settings, so puddler and barrel inner wall cooperation make puddler reciprocating motion about, when the puddler rotates and reciprocating motion about, liquid impact spiral flabellum, thereby drive the puddler rotation, puddler and the spiral flabellum spiral on the puddler stir liquid, make water and concrete health preserving agent intensive mixing, the mixing rate has been accelerated, the configuration efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a fan plate and a housing in a first embodiment of the invention.
Fig. 3 is a three-dimensional view of a fan plate and a turntable in a first embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a second embodiment of the present invention.
Notations for reference numerals: 1-frame, 2-cylinder, 3-universal pulley, 4-spiral fan blade, 5-stirring rod, 6-feed inlet, 7-first motor, 8-stirring shaft, 9-rod sleeve, 10-roller, 11-scissor mechanism, 12-oscillating bar, 13-pin, 14-rotary table, 15-through groove, 16-spray head, 17-booster pump, 18-main hose, 19-second motor, 20-movable plate, 21-screw rod, 22-shell, 23-sub hose and 24-fan plate.
Detailed Description
The present invention will be described in detail with reference to the following embodiments, wherein like or similar elements are designated by like reference numerals throughout the several views, and wherein the shape, thickness or height of the various elements may be expanded or reduced in practice. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention. Any obvious modifications or variations can be made to the present invention without departing from the spirit or scope of the present invention.
Example 1
Referring to fig. 1 to 3, in the embodiment of the invention, a bridge construction bridge deck concrete curing device for highway engineering comprises a frame 1, a barrel 2 and a spraying unit, wherein the frame 1 comprises a bottom plate and a hand frame, a storage battery for supplying power is installed on the frame 1, a feed inlet 6 is formed in the top of the barrel 2, rollers 10 are evenly and symmetrically installed at the bottom of the frame 1, the rollers 10 are self-locking rollers to facilitate movement of the device, a preparation unit for preparing a curing liquid is installed on the barrel 2, the preparation unit comprises a first motor 7, a stirring shaft 8, a stirring rod 5 and spiral fan blades 4, the stirring shaft 8 is eccentrically and rotatably installed in the barrel 2, in the embodiment, the stirring shaft 8 is preferably rotatably connected with the barrel 2 through a bearing, the first motor 7 is in driving connection with the stirring shaft 8, the first motor 7 is installed at the top of the barrel 2, an output shaft of the first motor 7 is preferably fixedly connected, a plurality of rod sleeves 9 are equidistantly fixed on the stirring shaft 8 from top to bottom, in the embodiment, the rod sleeves 9 are preferably fixed with the stirring shaft 8 by welding, stirring rods 5 penetrate through the rod sleeves 9, the stirring rods 5 are in clearance fit with the rod sleeves 9, two ends of each stirring rod 5 are in contact with the inner wall of the barrel body 2, furthermore, universal pulleys 3 are mounted at two ends of each stirring rod 5, the universal pulleys 3 are in contact with the inner wall of the barrel body 2, a plurality of spiral fan blades 4 are symmetrically mounted at two ends of each stirring rod 5, the spiral fan blades 4 are preferably connected with the stirring rods 5 through screws, when in use, water and the concrete curing agent are added into the barrel body 2, then the first motor 7 is started, the stirring shaft 8 is driven by the first motor 7 to rotate, the stirring shaft 8 drives the stirring rod 5 to rotate through the rod sleeves 9, and the stirring shaft 8 is eccentrically arranged, so that the stirring rods 5 are in cooperation with the inner, when the stirring rod 5 rotates and reciprocates left and right, liquid impacts the spiral fan blades 4, so that the stirring rod 5 is driven to rotate, the stirring rod 5 and the spiral fan blades 4 on the stirring rod 5 spirally stir the liquid, water and the concrete curing agent are fully mixed, the mixing speed is accelerated, the configuration efficiency is improved, one side of the bottom of the barrel 2 is connected with a main hose 18, a booster pump 17 is installed on the injection hose, the main hose 18 is connected with a plurality of branch hoses 23 through water pipe joints, further, the spraying unit is installed on the barrel 2 and comprises a scissor mechanism 11, a shell 22, fan plates 24, a rotary disc 14, a swing bar 12 and a spray head 16, the scissor mechanism 11 is installed on the barrel 2, the power source of the scissor mechanism 11 is an electric push rod, the swing bar 12 is hinged to the hinged end at the top of the scissor mechanism 11, the spray head 16 is installed at the bottom end of the swing bar 12, the rotary disc 14 is installed at the front end, the eccentric integral pin 13 is arranged on the end face of the rotary table 14, the swing rod 12 is provided with a through groove 15 for the pin 13 to insert and move, the rear end of a hinged pin shaft of a hinged end at the bottom of the scissor mechanism 11 is provided with a plurality of fan plates 24 in an equidistance direction, the fan plates 24 are arranged in a shell 22, the shell 22 is rotatably connected with the hinged pin shaft through a sealed bearing, the upper part of one side of the shell 22 is connected with a branch hose 23, the lower part of the other side of the shell 22 is connected with a spray head 16 through a connecting hose, when the rotary table works, the scissor mechanism 11 is firstly adjusted to extend or shorten according to different bridge deck widths, thereby effectively carrying out spray maintenance on the bridge deck, avoiding waste or insufficient spray, being convenient and practical, meanwhile, when the maintenance liquid enters the branch hose 23 through a main hose 18 and then enters the shell 22 to impact the rotation, the rotating disc 14 drives the pin 13 to rotate, and the pin 13 drives the swing rod 12 and the spray head 16 at the bottom end of the swing rod to swing, so that the spraying range is expanded, the health-preserving liquid is sprayed more fully and uniformly, and the health-preserving efficiency is improved.
Example 2
Referring to fig. 4, the embodiment of the present invention is different from embodiment 1 in that a lifting unit for driving a spraying unit to lift is further disposed on the barrel 2, the lifting unit includes a second motor 19, a screw rod 21 and a movable plate 20, the screw rod 21 is rotatably mounted on an outer wall of the barrel 2, the screw rod 21 is preferably rotatably connected to an outer wall of the barrel 2 through a fixing plate and a bearing, a top end of the screw rod 21 is fixedly connected to an output shaft of the second motor 19 through a coupling, the screw rod 21 is threadedly connected to the movable plate 20, the movable plate 20 is slidably connected to an outer wall of the barrel 2, so as to move and guide the movable plate 20 and prevent the movable plate 20 from rotating, the spraying unit is mounted on the movable plate 20, the screw rod 21 is driven by the second motor 19 to rotate, and the screw rod 21 drives the spraying.
The working principle of the invention is as follows: when the device is used, water and a concrete curing agent are added into the barrel body 2, then the first motor 7 is started, the first motor 7 drives the stirring shaft 8 to rotate, the stirring shaft 8 drives the stirring rod 5 to rotate through the rod sleeve 9, the stirring shaft 8 is eccentrically arranged, so the stirring rod 5 is matched with the inner wall of the barrel body 2 to enable the stirring rod 5 to reciprocate left and right, when the stirring rod 5 rotates and reciprocates left and right, liquid impacts the spiral fan blade 4 to drive the stirring rod 5 to rotate, the stirring rod 5 and the spiral fan blade 4 on the stirring rod spirally stir liquid, so that the water and the concrete curing agent are fully mixed, the mixing speed is accelerated, the configuration efficiency is improved, firstly, the shear fork mechanism 11 is adjusted to extend or shorten according to different bridge floor widths, thereby the liquid spraying curing can be effectively carried out on the bridge floor, the waste or insufficient liquid spraying is avoided, the device is convenient and practical, meanwhile, when the curing liquid enters the branch hose 23 through the main hose 18 and then, the fan plate 24 drives the rotary table 14 to rotate through the hinged pin shaft, the rotary table 14 drives the pin 13 to rotate, the pin 13 drives the swing rod 12 and the spray head 16 at the bottom end of the swing rod to swing, so that the spraying range is expanded, the health-preserving liquid is sprayed more fully and uniformly, the health-preserving efficiency is improved, the lead screw 21 can be driven by the second motor 19 to rotate, the lead screw 21 drives the spraying unit to lift through the movable plate 20, and the height of the spraying unit is adjusted.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims (7)

1. The utility model provides a highway engineering bridge construction bridge floor concrete health preserving device, includes frame (1), barrel (2) and sprays the unit, and barrel (2) top is equipped with feed inlet (6), and gyro wheel (10) are installed to the even symmetry in frame (1) bottom, barrel (2) bottom one side is connected with main hose (18), installs booster pump (17) on the notes hose, and main hose (18) are connected with many branch hoses (23) through water pipe head, it installs on barrel (2) to spray the unit, its characterized in that, sprays the unit and include cut fork mechanism (11), casing (22), flabellum (24), carousel (14), pendulum rod (12) and shower nozzle (16), cut fork mechanism (11) and install on barrel (2), cut all articulated on fork mechanism (11) top and have pendulum rod (12), shower nozzle (16) are installed to pendulum rod (12) bottom, a rotary table (14) is mounted at the front end part of a hinge pin shaft at the hinged end of the bottom of the fork shearing mechanism (11), a pin (13) is eccentrically and integrally arranged on the end surface of the rotary table (14), and a through groove (15) for the pin (13) to insert and move is formed in the swing rod (12);
The rear end of a hinge pin shaft at the hinged end of the bottom of the scissor fork mechanism (11) is provided with a plurality of fan plates (24) in an equal distance in the axial direction, the fan plates (24) are arranged in the shell (22), the shell (22) is rotatably connected with the hinge pin shaft through a sealing bearing, the upper part of one side of the shell (22) is connected with a sub-hose (23), and the lower part of the other side of the shell (22) is connected with a spray head (16) through a connecting hose.
2. The highway engineering bridge construction bridge deck concrete curing device according to claim 1, wherein the rollers (10) are self-locking rollers.
3. The highway engineering bridge construction bridge deck concrete curing device according to claim 1, wherein the frame (1) comprises a bottom plate and a hand frame.
4. The highway engineering bridge construction bridge deck concrete curing device according to claim 1, wherein a storage battery for supplying power is installed on the machine frame (1).
5. The road engineering bridge construction bridge deck concrete curing device as claimed in any one of claims 1 to 4, it is characterized in that a preparation unit for preparing health-preserving liquid is arranged on the cylinder body (2), the preparation unit comprises a first motor (7), a stirring shaft (8), a stirring rod (5) and a spiral fan blade (4), the utility model discloses a stirring shaft (8) eccentric rotation installation in barrel (2), first motor (7) drive connection (mixing) shaft (8), first motor (7) are installed in barrel (2) top, from last down equidistance is fixed with a plurality of rod cover (9) on (mixing) shaft (8), wear to be equipped with puddler (5) in rod cover (9), puddler (5) and rod cover (9) clearance fit, puddler (5) both ends all contact with barrel (2) inner wall, multi-disc spiral fan blade (4) are installed to puddler (5) both ends symmetry.
6. the highway engineering bridge construction bridge deck concrete health preserving device of claim 5, characterized in that, universal pulley (3) is installed at both ends of puddler (5), universal pulley (3) and barrel (2) inner wall contact.
7. The highway engineering bridge construction bridge deck concrete health preserving device of claim 6, characterized in that, still be equipped with the lift unit that is used for driving the unit that sprays to go up and down on barrel (2), the lift unit includes second motor (19), lead screw (21) and fly leaf (20), lead screw (21) rotate to be installed on barrel (2) outer wall, lead screw (21) preferably through fixed plate and bearing and barrel (2) outer wall rotation connection, the output shaft fixed connection of lead screw (21) top through shaft coupling and second motor (19), threaded connection has fly leaf (20) on lead screw (21), fly leaf (20) and barrel (2) outer wall sliding connection, the unit that sprays is installed on fly leaf (20).
CN201910868647.9A 2019-09-16 2019-09-16 Highway engineering bridge construction bridge face concrete health preserving device Pending CN110541366A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910868647.9A CN110541366A (en) 2019-09-16 2019-09-16 Highway engineering bridge construction bridge face concrete health preserving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910868647.9A CN110541366A (en) 2019-09-16 2019-09-16 Highway engineering bridge construction bridge face concrete health preserving device

Publications (1)

Publication Number Publication Date
CN110541366A true CN110541366A (en) 2019-12-06

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CN201910868647.9A Pending CN110541366A (en) 2019-09-16 2019-09-16 Highway engineering bridge construction bridge face concrete health preserving device

Country Status (1)

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CN (1) CN110541366A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113073572A (en) * 2021-05-15 2021-07-06 豫新华通路桥集团有限公司 Highway engineering bridge construction bridge face concrete curing means
CN113373765A (en) * 2021-07-27 2021-09-10 韩四红 Road and bridge is vibrating device for engineering
CN114833739A (en) * 2022-03-23 2022-08-02 浙江日鼎涂装科技有限公司 Hang tool of guitar in guitar production process
CN115005190A (en) * 2022-07-26 2022-09-06 江西农业工程职业学院 Insect-preventing medicine spraying equipment for rape planting

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CN205576702U (en) * 2016-04-27 2016-09-14 江苏中路新材料科技发展有限公司 Road construction pavement material sprinkler
CN206866456U (en) * 2017-05-16 2018-01-12 盐城旭华机械有限公司 A kind of foldable spraying device spray boom suitable for more landform
CN207383375U (en) * 2017-10-31 2018-05-22 山西省农业科学院作物科学研究所 A kind of crops pesticide spraying device
CN109183597A (en) * 2018-11-07 2019-01-11 潍坊市工业学校 A kind of highway engineering construction zebra stripes lineation device
CN208395678U (en) * 2018-06-21 2019-01-18 贵州路桥集团有限公司 A kind of health preserving equipment of bridge
CN208439432U (en) * 2018-05-31 2019-01-29 绵阳特航科技有限公司 A kind of agricultural powder sprinkling unmanned plane

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Publication number Priority date Publication date Assignee Title
JP2006118233A (en) * 2004-10-22 2006-05-11 Babcock Hitachi Kk Method of constructing road containing photocatalyst
CN201192048Y (en) * 2008-05-07 2009-02-11 中国农业科学院草原研究所 Vehicle-loaded spraying device for spraying medicine on grassland
CN202280013U (en) * 2011-10-26 2012-06-20 三一重工股份有限公司 Spraying, distributing and spreading machine
CN203542823U (en) * 2013-10-16 2014-04-16 长江南京航道工程局 Mobile thermal insulating, sun-proof and moisture preserving maintenance shed
CN205576702U (en) * 2016-04-27 2016-09-14 江苏中路新材料科技发展有限公司 Road construction pavement material sprinkler
CN206866456U (en) * 2017-05-16 2018-01-12 盐城旭华机械有限公司 A kind of foldable spraying device spray boom suitable for more landform
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CN208439432U (en) * 2018-05-31 2019-01-29 绵阳特航科技有限公司 A kind of agricultural powder sprinkling unmanned plane
CN208395678U (en) * 2018-06-21 2019-01-18 贵州路桥集团有限公司 A kind of health preserving equipment of bridge
CN109183597A (en) * 2018-11-07 2019-01-11 潍坊市工业学校 A kind of highway engineering construction zebra stripes lineation device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113073572A (en) * 2021-05-15 2021-07-06 豫新华通路桥集团有限公司 Highway engineering bridge construction bridge face concrete curing means
CN113073572B (en) * 2021-05-15 2022-08-16 豫新华通路桥集团有限公司 Highway engineering bridge construction bridge face concrete curing means
CN113373765A (en) * 2021-07-27 2021-09-10 韩四红 Road and bridge is vibrating device for engineering
CN113373765B (en) * 2021-07-27 2022-12-02 韩四红 Road and bridge is vibrating device for engineering
CN114833739A (en) * 2022-03-23 2022-08-02 浙江日鼎涂装科技有限公司 Hang tool of guitar in guitar production process
CN114833739B (en) * 2022-03-23 2024-05-14 浙江日鼎涂装科技有限公司 Jig for hanging guitar in guitar production process
CN115005190A (en) * 2022-07-26 2022-09-06 江西农业工程职业学院 Insect-preventing medicine spraying equipment for rape planting
CN115005190B (en) * 2022-07-26 2023-08-18 江西农业工程职业学院 Insect-proof medicine spraying equipment for rape planting

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Application publication date: 20191206

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