CN112676090A - Rust removal and paint spraying device for bridge guardrail - Google Patents
Rust removal and paint spraying device for bridge guardrail Download PDFInfo
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- CN112676090A CN112676090A CN202110042264.3A CN202110042264A CN112676090A CN 112676090 A CN112676090 A CN 112676090A CN 202110042264 A CN202110042264 A CN 202110042264A CN 112676090 A CN112676090 A CN 112676090A
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- paint spraying
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- rust removing
- dust
- bridge guardrail
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Abstract
The invention provides a rust removing and paint spraying device for a bridge guardrail, belongs to the technical field of bridge maintenance, and is used for solving the problems of low efficiency and inconvenience in rust removing and paint spraying of a bridge. The automatic cleaning device comprises an adjusting support and a vehicle body, wherein symmetrical sliding grooves are formed in two sides of the adjusting support, symmetrical sliding plates are arranged on the sliding grooves in a sliding mode, guide rods are fixed on the lower sides of the sliding plates, lifting mechanisms are arranged on the sliding plates and the guide rods, symmetrical guide plates are fixed on the side ends of the adjusting support, a paint spraying mechanism, a rust removing mechanism, a storage battery, a heating box and a dust collecting mechanism are arranged on the vehicle body, the dust collecting mechanism is connected with the air inlet end of the heating box, a hot air pipe is arranged at the air outlet end of the heating box, and the paint spraying mechanism, the rust removing mechanism; the invention can rapidly and efficiently derust and spray paint on the bridge guardrail, improves the working efficiency, and dries the paint on the bridge guardrail, effectively absorbs sand grains generated during derusting, can be repeatedly utilized, and avoids influencing the subsequent work.
Description
Technical Field
The invention belongs to the technical field of bridge maintenance, relates to a rust removing and paint spraying device, and particularly relates to a rust removing and paint spraying device for a bridge guardrail.
Background
The guardrail is referred to as an industrial guardrail. The guardrail is mainly used for protecting and protecting personal safety and equipment facilities in occasions such as houses, roads, commercial districts, public places and the like, the guardrail is visible everywhere in our lives, the upright posts of the guardrail are fixed with the ground through expansion bolts and are usually installed on the two sides of a logistics channel, the periphery of production equipment, building corners, the two sides of a door, the edges of a cargo bed and the like, and the damage of the equipment and the facilities caused by accidental impact when the carrying equipment shuttles back and forth is effectively avoided.
At present, when the bridge rust removal work is carried out, a rust remover is sprayed on a guardrail firstly by workers, then the rust is removed manually, but the workers are very dangerous when carrying out the rust removal work on the periphery of the bridge guardrail, the efficiency is low, the effect is poor, the environment is easily polluted, and the spray painting of the rust removed guardrail is inconvenient.
Therefore, a fast and efficient rust removing and paint spraying device for removing rust and spraying paint on the bridge is designed.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a rust removing and paint spraying device for a bridge guardrail, which aims to solve the technical problems that: how to rapidly and efficiently derust and spray paint on a bridge.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a rust cleaning paint spraying apparatus for bridge guardrail, including adjusting support and automobile body, adjust the spout that the support both sides were seted up the symmetry, it is equipped with the handle to adjust the support upper end, slide on the spout and be equipped with the slide of symmetry, slide tip spiro union has the hand to twist the bolt, the hand is twisted the bolt tip and is contradicted inside the spout, the slide downside is fixed with the guide bar, be provided with elevating system on slide and the guide bar, it is fixed with the deflector of symmetry to adjust the support side, the deflector inboard is fixed with a plurality of leading wheels, be provided with the mechanism of spraying paint on the automobile body, rust cleaning mechanism, the battery, heating box and dust absorption mechanism, dust absorption mechanism is connected with the air inlet end of heating box, the air-out end of heating box is equipped with the hot-blast main, the mechanism of spraying paint, rust.
The working principle of the invention is as follows: a user firstly pushes a vehicle body to the side of a bridge guardrail to be derusted, grasps a handle on an adjusting support 1, puts the adjusting support on the bridge guardrail, a guide wheel abuts against a guardrail cross rod, a sliding plate slides on a sliding groove, the distance between guide rods is adjusted, a lifting mechanism is aligned to a bridge guardrail vertical rod, the bridge guardrail vertical rod is fixed through a hand-screwed bolt, a paint spraying mechanism, a derusting mechanism and a dust absorption mechanism are started, the derusting mechanism derusts the bridge guardrail vertical rod, the lifting mechanism moves downwards at the same time, the derusting mechanism is driven to move while derusting, the paint spraying mechanism sprays paint to the derusted bridge guardrail vertical rod, the dust absorption mechanism absorbs and removes dust from the sand blasting, cold air is heated through a heating box, the painted bridge guardrail vertical rod is dried through a hot air pipe, then the lifting mechanism is aligned to the bridge guardrail cross rod, the guide, when returning, spray paint and dry, push the automobile body and adjust the support again through the handle, derust the spray paint to the next region of bridge railing.
The mechanism of spraying paint includes bin and paint spraying pump, and bin and paint spraying pump are all fixed on the automobile body, are equipped with the feed liquor pipe between the feed liquor end of the play liquid end of bin and paint spraying pump, and the play liquid end of paint spraying pump is equipped with out the liquid tee bend, goes out two play liquid ends of liquid tee bend and all is equipped with the drain pipe, and the drain pipe tip is equipped with the paint spraying head, paint spraying pump and battery electric connection.
Structure more than adopting starts the pump that sprays paint, and the pump that sprays paint is through the feed liquor pipe extraction from the storage box and sprays paint, and rethread drain pipe and spray paint head spout to bridge railing, spray paint to bridge railing.
The rust cleaning mechanism comprises a rust cleaning sand blasting machine, the rust cleaning sand blasting machine is arranged on the vehicle body, the discharge ends of the rust cleaning sand blasting machine are provided with discharge tee joints, two discharge ends of each discharge tee joint are provided with sand blasting pipes, the ends of the sand blasting pipes are provided with sand blasting heads, and the rust cleaning sand blasting machine is electrically connected with the storage battery.
By adopting the structure, the rust removal sand blasting machine is started, compressed air of the rust removal sand blasting machine is sprayed out of high-speed sand grains, and the bridge guardrail is subjected to rust removal through the sand blasting pipe.
Dust absorption mechanism is including jar and the fan of gathering dust, and jar and fan of gathering dust are all fixed on the automobile body, and the air inlet end of jar that gathers dust is equipped with the pipe of gathering dust, and jar inside that gathers dust is equipped with detachable dust bag, and the air-out end of jar that gathers dust is connected with the air inlet end of fan mutually, and the heating box setting is held at the air-out of fan, fan and battery electric connection.
By adopting the structure, the fan is started, the fan absorbs sand grains, iron rust and the like through the dust collection pipe and absorbs the sand grains, the iron rust and the like into the dust collection bag in the dust collection tank, and the absorbed sand grains can be reused after being screened.
Elevating system includes multistage electric putter, multistage electric putter fixes at the slide side, multistage electric putter's tip is equipped with the sliding seat, the sliding seat slides and sets up on the guide bar, the sliding seat side is equipped with the dust proof box, the arc wall has been seted up on the dust proof box, be equipped with the dustproof felt of elasticity on the arc wall, the play liquid pipe tip, sandblast pipe tip and hot-blast pipe tip all set up on the sliding seat, the pipe tip that gathers dust sets up at dust proof box lower extreme, sandblast pipe is located inside the dust proof box, the drain pipe is located the hot-blast pipe below, multistage electric putter and battery electric connection.
By adopting the structure, the multistage electric push rods are started and stretch out and draw back, so that the sliding seat slides up and down on the guide rod, the dustproof box moves up and down, the elastic dustproof felt can prevent dust from floating, and dust on the bridge guardrail after rust removal can be cleaned.
The materials of the storage box, the dust collection tank and the vehicle body are all made of stainless steel.
By adopting the structure, the stainless steel material can be anticorrosive and rustproof, the weight is light, and the cost is low.
Compared with the prior art, this rust cleaning paint spraying apparatus for bridge railing has following advantage:
1. through the cooperation of the rust removing mechanism and the dust collecting mechanism, the bridge guardrail can be rapidly subjected to rust removal, and meanwhile, sand grains are effectively absorbed and can be repeatedly utilized, so that the influence on subsequent work is avoided;
2. the paint spraying mechanism is matched with the heating box to quickly spray paint on the bridge guardrail, and simultaneously, cold air generated by the fan is heated to quickly dry paint on the bridge guardrail;
3. through the cooperation of adjusting support and elevating system, when the sliding seat was downward at the uniform velocity motion, derusting, dust absorption, spraying paint and drying had improved work efficiency simultaneously.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic cross-sectional view of a part of the components of the present invention;
in the figure: 1-adjusting support, 101-chute, 102-guide plate, 103-hand bolt, 104-slide plate, 105-guide wheel, 106-guide rod, 2-paint spraying mechanism, 201-liquid outlet pipe, 202-liquid inlet pipe, 203-storage tank, 204-paint spraying pump, 205-paint spraying head, 3-derusting mechanism, 301-derusting sand-blasting machine, 302-sand spraying pipe, 303-sand spraying head, 4-storage battery, 5-heating box, 501-hot air pipe, 6-dust collecting mechanism, 601-dust collecting tank, 602-dust collecting pipe, 603-fan, 7-vehicle body, 8-lifting mechanism, 801-elastic dustproof felt, 802-multistage electric push rod, 803-dust collecting box and 804-sliding seat.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Referring to fig. 1-3, the embodiment provides a rust removing and paint spraying device for a bridge guardrail, which includes an adjusting bracket 1 and a vehicle body 7, wherein two sides of the adjusting bracket 1 are provided with symmetrical sliding grooves 101, the upper end of the adjusting bracket 1 is provided with a handle, the sliding grooves 101 are slidably provided with symmetrical sliding plates 104, the end parts of the sliding plates 104 are screwed with hand-screwed bolts 103, the end parts of the hand-screwed bolts 103 are abutted against the inside of the sliding grooves 101, the lower sides of the sliding plates 104 are fixed with guide rods 106, the sliding plates 104 and the guide rods 106 are provided with lifting mechanisms 8, the side ends of the adjusting bracket 1 are fixed with symmetrical guide plates 102, the inner sides of the guide plates 102 are fixed with a plurality of guide wheels 105, the vehicle body 7 is provided with a paint spraying mechanism 2, a rust removing mechanism 3, a storage battery 4, a heating box 5 and a dust collecting mechanism 6, the dust collecting mechanism 6 is connected with the air, The hot air pipe 501 and the dust collection mechanism 6 are respectively connected with the lifting mechanism 8, and the heating box 5 is electrically connected with the storage battery 4;
a user firstly pushes a vehicle body 7 to the side of a bridge guardrail to be derusted, grasps a handle on an adjusting support 1, puts the adjusting support 1 on the bridge guardrail, a guide wheel 105 abuts against a guardrail cross rod, a sliding plate 104 slides on a sliding groove 101, the distance between guide rods 106 is adjusted, so that a lifting mechanism 8 is aligned with a bridge guardrail vertical rod, the lifting mechanism 8 is fixed by screwing a bolt 103 by hand, a paint spraying mechanism 2, a derusting mechanism 3 and a dust suction mechanism 6 are started, the derusting mechanism 3 derusts the bridge guardrail vertical rod, meanwhile, the lifting mechanism 8 moves downwards, drives the derusting mechanism 3 to derust and move simultaneously, the paint spraying mechanism 2 sprays paint to the derusted bridge guardrail vertical rod, the dust suction mechanism 6 absorbs and removes dust to the sand blast, cold air is heated by a heating box 5, the painted bridge guardrail vertical rod is dried by a hot air pipe 501, and then the lifting mechanism, the guide wheel 105 firstly slides on the cross bar of the guardrail, sand blasting is firstly carried out for rust removal, paint spraying and drying are carried out when the guide wheel returns, and then the vehicle body 7 and the adjusting bracket 1 are pushed through the handle to carry out rust removal and paint spraying on the next area of the bridge guardrail.
The paint spraying mechanism 2 comprises a storage tank 203 and a paint spraying pump 204, the storage tank 203 and the paint spraying pump 204 are both fixed on the vehicle body 7, a liquid inlet pipe 202 is arranged between a liquid outlet end of the storage tank 203 and a liquid inlet end of the paint spraying pump 204, a liquid outlet tee is arranged at a liquid outlet end of the paint spraying pump 204, liquid outlet pipes 201 are arranged at two liquid outlet ends of the liquid outlet tee, a paint spraying head 205 is arranged at the end part of each liquid outlet pipe 201, and the paint spraying pump 204 is electrically connected with the storage battery 4; the paint spraying pump 204 is started, the paint spraying pump 204 extracts paint from the storage tank 203 through the liquid inlet pipe 202, and the paint is sprayed to the bridge guardrail through the liquid outlet pipe 201 and the paint spraying head 205 to spray paint to the bridge guardrail.
The rust removing mechanism 3 comprises a rust removing sand blasting machine 301, the rust removing sand blasting machine 301 is arranged on the vehicle body 7, discharge ends of the rust removing sand blasting machine 301 are provided with discharge tee joints, sand blasting pipes 302 are arranged at two discharge ends of the discharge tee joints, sand blasting heads 303 are arranged at the end parts of the sand blasting pipes 302, and the rust removing sand blasting machine 301 is electrically connected with the storage battery 4; starting the rust removal sand blasting machine 301, enabling the rust removal sand blasting machine 301 to compress air to spray high-speed sand grains, and removing rust of the bridge guardrail through the sand blasting pipe 302.
The dust collection mechanism 6 comprises a dust collection tank 601 and a fan 603, both the dust collection tank 601 and the fan 603 are fixed on the vehicle body 7, a dust collection pipe 602 is arranged at an air inlet end of the dust collection tank 601, a detachable dust collection bag is arranged inside the dust collection tank 601, an air outlet end of the dust collection tank 601 is connected with an air inlet end of the fan 603, a heating box 5 is arranged at an air outlet end of the fan 603, and the fan 603 is electrically connected with the storage battery 4; the fan 603 is started, the fan 603 absorbs sand, rust and the like through the dust collection pipe 602, the sand is absorbed into a dust collection bag in the dust collection tank 601, and the absorbed sand can be reused after screening.
The lifting mechanism 8 comprises a multi-stage electric push rod 802, the multi-stage electric push rod 802 is fixed at the side end of the sliding plate 104, a sliding seat 804 is arranged at the end part of the multi-stage electric push rod 802, the sliding seat 804 is arranged on the guide rod 106 in a sliding manner, a dust-proof box 803 is arranged at the side end of the sliding seat 804, an arc-shaped groove is formed in the dust-proof box 803, an elastic dust-proof felt 801 is arranged on the arc-shaped groove, the end part of the liquid outlet pipe 201, the end part of the sand-blasting pipe 302 and the end part of the hot air pipe 501 are all arranged on the sliding seat 804, the end part of the dust-collecting pipe 602 is arranged at the lower end of the dust-proof box 803, the sand; the multistage electric push rod 802 is started, the multistage electric push rod 802 stretches, the sliding seat 804 slides up and down on the guide rod 106, the dust prevention box 803 moves up and down, and the elastic dust prevention felt 801 can prevent dust from floating and can also wipe dust on the bridge guardrail after rust removal.
The storage tank 203, the dust collection tank 601 and the vehicle body 7 are all made of stainless steel; the stainless steel material can be anticorrosive and rustproof, and has light weight and low cost.
In this embodiment, the fixing manners are all the most commonly used fixing and connecting manners in the field, such as welding and the like; the above electrical elements such as the fan 603 are prior art products, and can be directly purchased and used in the market, and the detailed description of the specific principle is omitted.
The working principle of the invention is as follows: a user firstly pushes a vehicle body 7 to the side of a bridge guardrail to be derusted, grasps a handle on an adjusting support 1, puts the adjusting support 1 on a cross bar of the bridge guardrail, leads a guide wheel 105 to abut against the cross bar of the bridge guardrail, leads a sliding plate 104 to slide on a sliding groove 101, adjusts the distance between two guide rods 106, leads a dust-proof box 803 to wrap a vertical bar of the bridge guardrail, fixes the vertical bar of the bridge guardrail by screwing a bolt 103 by hands, starts a paint spraying pump 204, a derusting sand-blasting machine 301 and a fan 603, leads the derusting sand-blasting machine 301 to compress air and spray high-speed sand, derusts the vertical bar of the bridge guardrail by a sand-blasting pipe 302, leads the fan 603 to absorb sand, iron rust and the like in the dust-collecting box 803 through a dust-collecting pipe 602, absorbs the absorbed sand into a dust-collecting bag in a dust-collecting tank 601, can be screened and reused, meanwhile, a multi-stage electric, meanwhile, cold air generated by the fan 603 is heated through the heating box 5, the sprayed bridge guardrail vertical rod is quickly dried through the hot air pipe 501, then the multistage electric push rod 802 is contracted to move upwards and aim at a bridge guardrail cross rod, a handle on the adjusting support 1 is pushed to enable the guide wheel 105 to slide on the guardrail cross rod, sand blasting and rust removal are firstly carried out on the guardrail cross rod in the first step, paint spraying and drying are carried out on the guardrail cross rod in the second step, then the vehicle body 7 and the adjusting support 1 are pushed away through the handle, and rust removing and paint spraying are carried out on the next area of the bridge guardrail.
In conclusion, through the cooperation of the rust removing mechanism 3 and the dust collecting mechanism 6, the bridge guardrail can be rapidly subjected to rust removal, sand grains can be effectively absorbed and can be repeatedly utilized, and the influence on subsequent work is avoided; the bridge guardrail is quickly painted through the matching of the painting mechanism 2 and the heating box 5, and meanwhile, cold air generated by the heating fan 603 is heated to quickly dry paint on the bridge guardrail; through the cooperation of adjusting support 1 and elevating system 8, when sliding seat 804 uniform motion downwards, derusting, dust absorption, spraying paint and drying have improved work efficiency simultaneously.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (6)
1. A rust-removing and paint-spraying device for a bridge guardrail comprises an adjusting support (1) and a vehicle body (7), and is characterized in that symmetrical sliding grooves (101) are formed in two sides of the adjusting support (1), a handle is arranged at the upper end of the adjusting support (1), symmetrical sliding plates (104) are arranged on the sliding grooves (101) in a sliding mode, hand-screwing bolts (103) are screwed at the end parts of the sliding plates (104), the end parts of the hand-screwing bolts (103) are abutted to the inside of the sliding grooves (101), guide rods (106) are fixed on the lower sides of the sliding plates (104), lifting mechanisms (8) are arranged on the sliding plates (104) and the guide rods (106), symmetrical guide plates (102) are fixed at the side ends of the adjusting support (1), a plurality of guide wheels (105) are fixed on the inner sides of the guide plates (102), a paint-spraying mechanism (2), a rust-removing mechanism (3), a storage battery (4, dust absorption mechanism (6) are connected with the air inlet end of heating box (5), and the air-out end of heating box (5) is equipped with hot-blast main (501), and mechanism (2), rust cleaning mechanism (3), hot-blast main (501) and dust absorption mechanism (6) of spraying paint are connected with elevating system (8) respectively, and heating box (5) and battery (4) electric connection.
2. The rust removing and paint spraying device for the bridge guardrail as claimed in claim 1, wherein the paint spraying mechanism (2) comprises a storage tank (203) and a paint spraying pump (204), the storage tank (203) and the paint spraying pump (204) are both fixed on the vehicle body (7), a liquid inlet pipe (202) is arranged between a liquid outlet end of the storage tank (203) and a liquid inlet end of the paint spraying pump (204), a liquid outlet tee is arranged at the liquid outlet end of the paint spraying pump (204), liquid outlet pipes (201) are arranged at two liquid outlet ends of the liquid outlet tee, a paint spraying head (205) is arranged at the end part of each liquid outlet pipe (201), and the paint spraying pump (204) is electrically connected with the storage battery (4).
3. The rust removing and paint spraying device for the bridge guardrail as claimed in claim 2, wherein the rust removing mechanism (3) comprises a rust removing sand blasting machine (301), the rust removing sand blasting machine (301) is arranged on the vehicle body (7), a discharging tee joint is arranged at the discharging end of the rust removing sand blasting machine (301), sand blasting pipes (302) are arranged at two discharging ends of the discharging tee joint, a sand blasting head (303) is arranged at the end part of each sand blasting pipe (302), and the rust removing sand blasting machine (301) is electrically connected with the storage battery (4).
4. The rust removing and paint spraying device for the bridge guardrail, which is characterized in that the dust collection mechanism (6) comprises a dust collection tank (601) and a fan (603), the dust collection tank (601) and the fan (603) are both fixed on the vehicle body (7), a dust collection pipe (602) is arranged at an air inlet end of the dust collection tank (601), a detachable dust collection bag is arranged inside the dust collection tank (601), an air outlet end of the dust collection tank (601) is connected with an air inlet end of the fan (603), a heating box (5) is arranged at an air outlet end of the fan (603), and the fan (603) is electrically connected with a storage battery (4).
5. The rust removing and paint spraying device for the bridge guardrail as claimed in claim 4, elevating system (8) are including multistage electric putter (802), multistage electric putter (802) are fixed at slide (104) side, the tip of multistage electric putter (802) is equipped with sliding seat (804), sliding seat (804) slide and set up on guide bar (106), sliding seat (804) side is equipped with dust proof box (803), the arc wall has been seted up on dust proof box (803), be equipped with elasticity dustproof felt (801) on the arc wall, drain pipe (201) tip, sandblast pipe (302) tip and hot-blast main (501) tip all set up on sliding seat (804), dust collection pipe (602) tip sets up at dust proof box (803) lower extreme, sandblast pipe (302) are located inside dust proof box (803), drain pipe (201) are located hot-blast main (501) below, multistage electric putter (802) and battery (4) electric connection.
6. The rust removing and paint spraying device for the bridge guardrail is characterized in that the storage tank (203), the dust collecting tank (601) and the vehicle body (7) are made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110042264.3A CN112676090A (en) | 2021-01-13 | 2021-01-13 | Rust removal and paint spraying device for bridge guardrail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110042264.3A CN112676090A (en) | 2021-01-13 | 2021-01-13 | Rust removal and paint spraying device for bridge guardrail |
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| Publication Number | Publication Date |
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| CN112676090A true CN112676090A (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110042264.3A Pending CN112676090A (en) | 2021-01-13 | 2021-01-13 | Rust removal and paint spraying device for bridge guardrail |
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| CN114260830A (en) * | 2021-12-29 | 2022-04-01 | 李瑞发 | Bridge guardrail rust cleaning anti-pollution equipment |
| CN115431180A (en) * | 2022-09-05 | 2022-12-06 | 杜莹莹 | Bridge arch guardrail rust cleaning device |
| CN115431180B (en) * | 2022-09-05 | 2024-05-03 | 张学义 | Bridge arch guardrail rust cleaning device |
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| CN114260830A (en) * | 2021-12-29 | 2022-04-01 | 李瑞发 | Bridge guardrail rust cleaning anti-pollution equipment |
| CN115431180A (en) * | 2022-09-05 | 2022-12-06 | 杜莹莹 | Bridge arch guardrail rust cleaning device |
| CN115431180B (en) * | 2022-09-05 | 2024-05-03 | 张学义 | Bridge arch guardrail rust cleaning device |
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Application publication date: 20210420 |
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| RJ01 | Rejection of invention patent application after publication |