CN114439318A - Construction road safety net - Google Patents
Construction road safety net Download PDFInfo
- Publication number
- CN114439318A CN114439318A CN202210371075.5A CN202210371075A CN114439318A CN 114439318 A CN114439318 A CN 114439318A CN 202210371075 A CN202210371075 A CN 202210371075A CN 114439318 A CN114439318 A CN 114439318A
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- frame
- safety net
- roller
- pipe
- woven bag
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/16—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames
- E04H17/161—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames using wire panels
- E04H17/163—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames using wire panels using wired panels with frame
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The invention discloses a construction road safety net which comprises a frame assembly, wherein the frame assembly forms four frames of the safety net and comprises an upper frame, a lower frame and two side frames, and the end parts of the side frames are hinged with the end parts of the upper frame and the lower frame, which are on the same side; the locking device is used for fixing the positions among the side frame, the upper frame and the lower frame; the tensioning assembly comprises an upper edge roller, a lower edge roller and a tensioning belt; the upper edge roller comprises a hollow long pipe, a coil spring and a central pipe, and the spare end of the outer ring of the coil spring is fixed on the inner wall of the long pipe; the central tube is inserted in the inner ring of the coil spring and is fixedly connected with the spare end of the inner ring of the coil spring; one end of the tensioning belt is fixedly connected with the lower edge roller; the other end of the stretching belt is fixedly connected with the outer wall of the long pipe of the upper edge roller; the tensioning belt is provided with a plurality of tensioning belts which are uniformly distributed between the upper roller and the lower roller. The safety net can avoid the rebound of large force on the collided object.
Description
Technical Field
The invention relates to a peripheral protection device for engineering construction, in particular to a protective net installed on the side of a construction road.
Background
To the protection of road construction avris among the prior art, all very inconvenient when using modes such as scaffold frame stretch-draw gauze, water horse enclose fender, brick wall building, metal color steel tile when in actual use, especially receive the striking back, the deformation is repaired very trouble.
Chinese patent CN110259166B provides a guardrail with a spring, which has no problem in small-sized impact, but in road construction, if a vehicle, especially a two-wheel or three-wheel motor vehicle such as an electric vehicle and a motorcycle, impacts the fence, the vehicle will be rebounded and fall down on the normal driving road, which is very dangerous. Inside construction place, heavy object like steel bar steel pipe striking spring can lead to the people to be hurt in the bounce.
Disclosure of Invention
The embodiment of the application provides a construction road safety net, has solved among the prior art rail and has been hit and damage easily, and the problem of incident takes place easily to elasticity rail bounce back after being hit, has realized that the rail is hit not fragile, and can not take place to bounce-back and lead to the effect that the dangerous condition takes place.
The embodiment of the application provides a construction road safety net, which comprises a frame assembly, wherein the frame assembly forms four frames of the safety net and comprises an upper frame, a lower frame and two side frames, and the end parts of the side frames are hinged with the end parts of the upper frame and the lower frame on the same side, so that the frame assembly can be folded; the locking device is used for fixing the positions among the side frame, the upper frame and the lower frame;
two ends of the upper frame are provided with upper lock catches;
two ends of the lower frame are provided with lower lock catches;
the tensioning assembly is used for filling gaps in the frame assembly;
the tensioning assembly comprises an upper edge roller, a lower edge roller and a tensioning belt;
the upper edge roller comprises a hollow long pipe, a coil spring and a central pipe, and the spare end of the outer ring of the coil spring is fixed on the inner wall of the long pipe; the central tube is inserted in the inner ring of the coil spring and is fixedly connected with the spare end of the inner ring of the coil spring;
the upper lock catch is detachably and fixedly connected with two ends of the central tube, so that the upper edge roller is detachably fixed on the upper frame;
the lower lock catch is used for being fixedly connected with two ends of the lower edge roller, so that the lower edge roller is fixed on the lower frame;
one end of the tensioning belt is fixedly connected with the lower edge roller; the other end of the stretching belt is fixedly connected with the outer wall of the long pipe of the upper edge roller; a plurality of tensioning belts are uniformly distributed between the upper side roller and the lower side roller; the length of the stretching strap is larger than the distance between the upper edge stick and the lower edge stick after installation.
The safety net further comprises a connecting clamp used for connecting adjacent safety nets, the connecting clamp is cylindrical, fastening portions are arranged at two ends of the connecting clamp, and the fastening portions are used for being detachably and fixedly connected with the end heads of the upper frame and/or the lower frame.
The fastening part is one of an internal thread on the inner wall of the cylinder, a bolt matched with the through hole on the cylinder wall and a bolt inserted in the through hole on the cylinder wall.
Further, the tension belt still has 5-30cm of winding on the upper roller after being tensioned;
the tension belt comprises a waterproof bag, a mixture and a woven bag;
the waterproof bag is filled with a mixture, the mixture is prepared by mixing high-water-absorption resin particles and bentonite, the maximum diameter of the high-water-absorption resin particles after absorbing water is not more than 3mm, and the volume ratio of the high-water-absorption resin particles to the bentonite is 1/8-1/4;
the waterproof bag is placed in the woven bag, and the waterproof bag is fixedly connected with the two ends of the woven bag.
Further, the mixture is filled after mixing with water.
Further, the mixture is filled with dry material; when dry materials are filled, a connecting valve is reserved at the end of the tensioning belt, the connecting valve is positioned in the central pipe, the connecting valve is a one-way valve, and water is injected through the central pipe.
Furthermore, a fold part is fixed on one side surface of the tensioning belt, the length of the fold part with uniformly distributed through holes is greater than that of the woven bag, the length of the fold part is 1.2-1.5 times that of the woven bag, two ends of the fold part are fixed with two ends of the woven bag, the side edges of the fold part are fixed on the surface of the woven bag, an air inlet valve is communicated with the end of the woven bag at the fold part, the air inlet valve is also a one-way valve, and the pressure required by opening the air inlet valve is less than the pressure required by opening the connecting valve; the air inlet valve is communicated with the space between the fold part and the woven bag.
Furthermore, the warp and weft of the braided wires of the braided bag form an angle of 45 degrees with the vertical direction.
Further, still include the connecting pipe, the external diameter at connecting pipe both ends is not less than the center tube internal diameter, and the connecting pipe both ends are the elasticity pipe, and the connecting pipe both ends can insert in the center tube, form airtight cooperation with the center tube.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: the safety net is designed into a foldable frame, so that the safety net is convenient to disassemble, assemble, store and transport. Meanwhile, the internal clearance of the frame can be quickly closed by utilizing the tensioning belt wound by the coil spring, so that the safety net with micro-elasticity is formed. Avoiding the danger caused by rebound after collision.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a frame assembly in a collapsed state;
FIG. 3 is a schematic view of the structure of the tension assembly and the frame assembly;
FIG. 4 is a schematic view of the engagement structure of the locking device and the central tube;
FIG. 5 is a schematic view of the engagement structure of the connection clip and the connection tube with the locking buckle and the central tube;
FIG. 6 is a schematic view of a tension band in a wound state;
FIG. 7 is a schematic plan view of a tension band in a wound state;
FIG. 8 is a schematic view of the internal structure of the tension belt;
FIG. 9 is a schematic view of the interior structure of the tensioned strap after being impacted;
FIG. 10 is a schematic cross-sectional view of the post-impact tensioned belt;
FIG. 11 is a schematic cross-sectional view of a tensioned belt in an unimpacted state;
FIG. 12 is a schematic view of a tensioned belt with a pleat formation;
FIG. 13 is a schematic view of the fitting structure of the corrugated part and the tension belt in air-jet and water states.
In the drawings, a frame assembly 100, an upper frame 110, an upper latch 111, a lower frame 120, a lower latch 121, a side frame 130, a connection clip 140, and a connection pipe 150;
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
By designing the safety net into a foldable frame, the safety net is convenient to disassemble, assemble, store and transport. Meanwhile, the tension belt wound by the coil spring can quickly close the gap inside the frame to form the safety net with micro elasticity. Avoiding the danger caused by rebound after collision.
Example one
As shown in fig. 1-9, a construction road safety net includes a frame assembly 100, the frame assembly 100 forming four borders of a unit safety net, including an upper border 110, a lower border 120 and two side borders 130,
the end of the side frame 130 is hinged with the same side end of the upper frame 110 and the lower frame 120, so that the frame assembly 100 can be folded; the connection part of the side frame 130 and the upper frame 110 and the lower frame 120 is provided with a locking device, and the locking device is used for fixing the position between the side frame 130 and the upper frame 110 and the lower frame 120;
two ends of the upper frame 110 are provided with upper lock catches 111;
two ends of the lower frame 120 are provided with lower lock catches 121;
further comprising a tension assembly 200, the tension assembly 200 being used to fill gaps in the frame assembly 100;
the tensioning assembly 200 includes an upper roller 210, a lower roller 220, and a tensioning belt 230;
the upper roller 210 comprises a hollow long pipe, a coil spring 211 and a central pipe 212, wherein the spare end of the outer ring of the coil spring 211 is fixed on the inner wall of the long pipe; the central tube 212 is inserted in the inner ring of the coil spring 211 and is fixedly connected with the vacant end of the inner ring of the coil spring 211;
the upper lock catches 111 are used for being detachably and fixedly connected with two ends of the central tube 212, so that the upper edge rollers 210 can be detachably fixed on the upper frame 110;
the lower lock catch 121 is used for being fixedly connected with two ends of the lower edge roller 220, so that the lower edge roller 220 is fixed on the lower frame 120;
one end of the tensioning belt 230 is fixedly connected with the lower roller 220; the other end of the tensioning belt 230 is fixedly connected with the outer wall of the long pipe of the upper edge roller 210; the tension belt 230 is provided in plural number and is uniformly arranged between the upper roller 210 and the lower roller 220.
As shown in fig. 1-9, in use:
1) the frame assembly 100 in a folded state is unfolded to be rectangular, the positions between the side frame 130 and the upper frame 110 and between the side frame 120 are fixed by a locking device, so that the frame assembly 100 is rectangular, the locking device can be selected from a plurality of methods, for example, 1, bolts are fixed at two ends of a connecting rod, pin holes are formed in the upper frame, the lower frame and the side frame, one end of the connecting rod with the bolts at two ends is inserted into the upper frame or the lower frame, the other end of the connecting rod is inserted into the side frame and forms triangular fixation with the upper frame or the lower frame and the side frame, 2, sleeves and rotating shafts are used at hinged positions, and the positions of the frames can be locked by inserting the bolts through overhead holes in the sleeves and the rotating shafts;
2) the lower edge roller 220 is fixed on the lower frame 120 through the lower lock catch 121, the upper edge roller 210 is pulled, the upper edge roller 210 is fixed on the upper frame 110, the tensioning belt 230 is unfolded to form a fence, pin holes are formed in two ends of the center pipe 212, the upper lock catch 111 is an openable ring, a pin shaft is arranged at the bottom of the ring and can be inserted into the pin hole in the lower end of the center pipe 212, and a pin shaft capable of being inserted into the pin hole in the upper portion of the center pipe 212 is arranged on the opening portion of the ring, so that the upper edge roller 210 is fixed.
Therefore, the fence can be conveniently disassembled, assembled, transported and stored. And the fence is surrounded by the tension belt 230 which is matched with the upper roller 210 with the coil spring 211 and the lower roller 220, so that strong rebound cannot be formed when the fence is impacted, and damage caused by the rebound is avoided. In addition, the tension band 230 is also easier to replace than a spring, and can be replaced quickly after damage. The use of springs as barriers is more cumbersome to replace, since the individual springs are smaller, the number of interconnected positions is greater, and more unit springs are removed for replacement of a damaged spring in the central position. Replacement of the tension belts 230 does not require disassembly of adjacent tension belts 230 and is a separate unit.
The safety nets may be combined with each other by connectors to form a continuous enclosure.
Therefore, the safety net further comprises a connecting clamp 140 for connecting the upper frame 110 and the lower frame 120 of the adjacent safety nets, wherein the connecting clamp 140 is cylindrical, and fastening parts are arranged at two ends of the connecting clamp and are used for being detachably and fixedly connected with the ends of the upper frame 110 and/or the lower frame 120. The fastening part is one of an internal thread on the inner wall of the cylinder, a bolt matched with the through hole on the cylinder wall and a bolt inserted in the through hole on the cylinder wall.
If the two ends of the connection card 140 have internal threads, the outer walls of the upper latch 111 or the lower latch 121 at the two ends of the upper frame 110 or the lower frame 120 have external threads, and after the latches are closed, the connection card 140 is screwed onto the outer walls of the latches, so as to facilitate subsequent installation of the frame assembly 100, when the connection card 140 is screwed to the frame, the connection card 140 is divided into two sections, and the two sections are hinged or connected by a ball at the middle part of the connection card 140. When the bolt or the pin shaft is used for connection, the wall of the barrel is provided with a through hole, the outer walls of the corresponding upper and lower lock catches are provided with threads or through holes, and the bolt is screwed in or the pin shaft is inserted to complete fixation.
Example two
In practical use, it is found that when the tension belt 230 is impacted, if the length after tension is the limit length, the impact force is large, the tension belt is easily broken, and the coil spring is also easily damaged. If the length of the stretch-draw tape is greater than the length after installation, the portion wound around the upper roller 210 is drawn out by the impact, and a certain elastic force is still provided. If the elastic force is a tire which is separated from a vehicle on the road surface, a stone which is dropped by a truck, a small goods, a suspended object which has no contact point with the road surface, and the like, the advancing direction of the elastic force can still be changed, and the elastic force enters the driving road. Therefore, the structure of the tension belt 230 is further improved.
The stretching belt 230 is still wound on the upper roller 210 by 5-30cm after the upper roller 210 and the lower roller 220 are fixed;
the stretching belt 230 comprises a waterproof bag 231, a mixture 232 and a woven bag 233;
the waterproof bag 231 is filled with a mixture 232, the mixture 232 is prepared by mixing high water-absorbent resin particles and bentonite, the maximum diameter of the high water-absorbent resin particles after absorbing water is not more than 3mm, and the volume ratio of the high water-absorbent resin particles to the bentonite is 1/8-1/4;
the waterproof bag 231 is placed in the woven bag 233, and the waterproof bag 231 is fixedly connected with two ends of the woven bag 233.
In use, the super absorbent resin particles and the bentonite are mixed, and after being impacted, the mixture shows plasticity, although the rest part of the tension band 230 is pulled out, because the tension band 230 is deformed after the impact, the coil spring needs to overcome the deformation for rewinding, and the tension band 230 needs more time for rewinding, and basically no rebound occurs. Moreover, since the reserved tension belt 230 is not pulled out, the impact is less likely to cause great damage to the tension belt. Meanwhile, as the tension belt is filled with the mixture 232, the impact force is counteracted by the deformation of the plastic mixture 232, and the tension belt cannot be damaged due to local stress. As shown in fig. 6-9.
When in use, the mixture 232 can be mixed with water and then filled, and can also be filled with dry materials. When dry materials are filled, a connecting valve 234 needs to be reserved at the end of the tensioning belt 230, the connecting valve 234 is located in the central pipe 212, the connecting valve 234 is a one-way valve, water is injected through the central pipe 212, water is injected into the waterproof bag 231 under fixed pressure, and the water injection amount is convenient to control.
In order to further protect the stretching strap 230, the woven warp and weft of the woven bag 233 form an angle of 45 degrees with the vertical direction. Thus, after being impacted, the tension belt can be elongated, the width of the tension belt is reduced, and the deformation of the mixture is matched, so that the deformation capacity of the tension belt after being stressed is further improved, and the probability of the damage of the tension belt due to the impact is reduced, as shown in figures 9-11.
EXAMPLE III
After the tension band 230 is used for a long time, a large amount of dust particles are adhered, therefore, a fold part 240 is fixed on one side surface of the tension band 230, the fold part 240 is provided with through holes which are uniformly distributed, such as gauze, the length of the fold part 240 is 1.2-1.5 times that of the fold part 240 of the woven bag 233, two ends of the fold part 240 are fixed with two ends of the woven bag 233, the side edges of the fold part are fixed on the surface of the woven bag 233, an air inlet valve 235 is communicated with the end of the woven bag 233, the air inlet valve 235 is also a one-way valve, the pressure required for opening the air inlet valve 235 is smaller than the pressure required for opening the connecting valve 234, and the air inlet valve 235 is communicated with the space between the fold part 240 and the woven bag 233, as shown in fig. 12-13.
When the central pipe 212 is used, part of water is injected, air is simultaneously introduced, the air inlet pressure is smaller than the communication pressure of the connecting valve 234 and larger than the communication pressure of the air inlet valve 235, so that the water and the air only enter between the woven bag and the folded part and are sprayed out of the folded part. The water mist expanded and sprayed out through the corrugated part 240 cleans dust particles on the surface on one hand, and sprays dust to the surrounding environment on the other hand.
In order to enable water and air of the enclosure combined by the safety net to be communicated, the enclosure combined by the safety net further comprises a connecting pipe 150, the outer diameters of two ends of the connecting pipe 150 are not smaller than the inner diameter of the central pipe 212, the two ends of the connecting pipe 150 are elastic pipes, and the two ends of the connecting pipe 150 can be inserted into the central pipe 212 to form airtight fit with the central pipe 212.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (9)
1. A construction road safety net comprising a frame assembly (100), the frame assembly (100) forming four borders of the safety net, including an upper border (110), a lower border (120) and two side borders (130),
the end part of the side frame (130) is hinged with the end part of the upper frame (110) and the end part of the lower frame (120) on the same side, so that the frame assembly (100) can be folded; the connecting parts of the side frames (130) and the upper frame (110) and the lower frame (120) are provided with locking devices, and the locking devices are used for fixing the positions among the side frames (130) and the upper frame (110) and the lower frame (120);
two ends of the upper frame (110) are provided with upper lock catches (111);
two ends of the lower frame (120) are provided with lower lock catches (121);
the tensioning assembly (200) is used for filling the gap in the frame assembly (100);
the tensioning assembly (200) comprises an upper side roller (210), a lower side roller (220) and a tensioning belt (230);
the upper side roller (210) comprises a hollow long pipe, a coil spring (211) and a central pipe (212), and the spare end of the outer ring of the coil spring (211) is fixed on the inner wall of the long pipe; the central tube (212) is inserted in the inner ring of the coil spring (211) and is fixedly connected with the spare end of the inner ring of the coil spring (211);
the upper lock catch (111) is detachably and fixedly connected with two ends of the central pipe (212) to enable the upper edge roller (210) to be detachably fixed on the upper frame (110);
the lower lock catch (121) is fixedly connected with two ends of the lower edge roller (220) to fix the lower edge roller (220) on the lower frame (120);
one end of the stretching belt (230) is fixedly connected with the lower edge roller (220); the other end of the stretching belt (230) is fixedly connected with the outer wall of the long pipe of the upper edge roller (210); a plurality of stretching belts (230) are uniformly distributed between the upper side roller (210) and the lower side roller (220); the length of the stretching strap (230) is larger than the distance between the upper edge stick (210) and the lower edge stick (220) after installation.
2. The construction road safety net according to claim 1, further comprising a connection clip (140) for connecting adjacent safety nets, wherein the connection clip (140) has a cylindrical shape with fastening portions at both ends for detachably and fixedly connecting with ends of the upper frame (110) and/or the lower frame (120).
3. The construction road safety net of claim 2, wherein the fastening portion is one of an internal thread of the inner wall of the cylinder, a bolt fitted into a through hole of the cylinder wall, and a plug inserted into a through hole of the cylinder wall.
4. The construction road safety net according to claim 1, wherein the stretching belt (230) is wound on the upper roller (210) by 5-30cm after being stretched;
the stretching belt (230) comprises a waterproof bag (231), a mixture (232) and a woven bag (233);
the waterproof bag (231) is filled with a mixture (232), the mixture (232) is prepared by mixing high-water-absorption resin particles and bentonite, the maximum diameter of the high-water-absorption resin particles after full water absorption is not more than 3mm, and the volume ratio of the high-water-absorption resin particles to the bentonite is 1/8-1/4;
the waterproof bag (231) is arranged in the woven bag (233), and the waterproof bag (231) is fixedly connected with the two ends of the woven bag (233).
5. The construction road safety net according to claim 4, wherein the mixture (232) is filled after mixing with water.
6. The construction road safety net of claim 4, wherein the mixture is filled with dry materials; when dry materials are filled, a connecting valve (234) is reserved at the end of the tensioning belt (230), the connecting valve (234) is located in the central pipe (212), the connecting valve (234) is a one-way valve, and water is injected through the central pipe (212).
7. The construction road safety net according to claim 6, wherein a fold part (240) is fixed on one side surface of the stretching strap (230), the fold part (240) is provided with through holes which are uniformly distributed, the length of the fold part (240) is larger than that of the woven bag (233), the length of the fold part (240) is 1.2-1.5 times that of the woven bag (233), two ends of the fold part are fixed with two ends of the woven bag (233), the side edge is fixed on the surface of the woven bag (233), an air inlet valve (235) is communicated at the end parts of the fold part (240) and the woven bag (233), the air inlet valve (235) is also a one-way valve, and the pressure required by opening the air inlet valve (235) is smaller than the pressure required by opening the connecting valve (234); the air inlet valve (235) is communicated with the space between the corrugated part (240) and the woven bag (233).
8. The construction road safety net according to claim 4, wherein the woven bag (233) has woven warp and weft lines at an angle of 45 degrees to the vertical direction.
9. The construction road safety net according to any one of claims 1-8, further comprising a connecting pipe (150), wherein the outer diameter of both ends of the connecting pipe (150) is not less than the inner diameter of the central pipe (212), and both ends of the connecting pipe (150) are elastic pipes, and both ends of the connecting pipe (150) can be inserted into the central pipe (212) to form an airtight fit with the central pipe (212).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210371075.5A CN114439318B (en) | 2022-04-11 | 2022-04-11 | Construction road safety net |
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| CN202210371075.5A CN114439318B (en) | 2022-04-11 | 2022-04-11 | Construction road safety net |
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| CN114439318B CN114439318B (en) | 2022-06-21 |
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| CN207998812U (en) * | 2018-02-28 | 2018-10-23 | 浙江金运科技有限公司 | A kind of urban transportation energy-absorbing guardrail for road |
| CN208456264U (en) * | 2018-06-01 | 2019-02-01 | 广州市四一海交通设施有限公司 | One kind can store easy assembling type road construction safety guide rail |
| CN210766545U (en) * | 2019-08-15 | 2020-06-16 | 程周文 | Temporary guardrail for municipal road construction |
| CN211713810U (en) * | 2020-01-13 | 2020-10-20 | 湖南昌恒建设有限公司 | Protection device for road engineering construction is used |
| CN213896926U (en) * | 2020-11-11 | 2021-08-06 | 乐昌市经纬建设工程有限公司 | Road safety protection net for municipal works |
| CN216130025U (en) * | 2021-08-26 | 2022-03-25 | 林李萍 | Road construction protection network for municipal works |
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|---|---|
| CN114439318B (en) | 2022-06-21 |
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