CN212201545U - Protection device for road engineering construction is used - Google Patents
Protection device for road engineering construction is used Download PDFInfo
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- CN212201545U CN212201545U CN202020587129.8U CN202020587129U CN212201545U CN 212201545 U CN212201545 U CN 212201545U CN 202020587129 U CN202020587129 U CN 202020587129U CN 212201545 U CN212201545 U CN 212201545U
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Abstract
The utility model provides a protector that road engineering construction used belongs to road construction equipment technical field, including base and attention device, the device still includes: the 2 weight boxes are symmetrically arranged at two ends of the base; 2 mounting components which are arranged on two sides of the warning indicator and are detachably connected with the corresponding weight box; the two sides of the lower end of the warning device are provided with rotating rods, and each rotating rod is rotatably connected with the corresponding mounting component; the upper end both sides of attention device all are equipped with adjusting screw, every all be provided with the arc hole on the installation component, every adjusting screw all passes rather than the arc hole that corresponds, and the spiro union has adjusting nut. The device improves the stability of installation through adding the counter weight material in the weight box, can provide the warning for pedestrian or vehicle through the suggestion structure on the attention device lateral wall moreover, further improves the device's protection security.
Description
Technical Field
The utility model belongs to the technical field of the road construction equipment, concretely relates to protector that road engineering construction was used.
Background
In the town road work progress, need set up protector in the construction highway section usually, this not only can ensure going on smoothly of guarantee construction engineering, can avoid unnecessary incident simultaneously, the safety of guarantee pedestrian and vehicle passes through.
The existing protection device is mainly formed by welding common steel bars or steel plates, lacks of the center of gravity of a base, and is easily blown away in strong wind weather, so that the safety of road construction is influenced. And because the protective device lacks obvious suggestion plane, also can cause the condition that the mistake hits the rail guard to take place at night or under the weather that the fog is great, because the rail guard is by billet or steel sheet welding shaping, the striking of vehicle causes the deformation of protective device very easily, also can cause the scratch to the vehicle.
Therefore, in order to ensure the safe isolation between the construction site and the municipal road, a safety protection device with a counterweight center of gravity and an obvious prompting structure is required to be provided.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, an object of the utility model is to provide a protector that road engineering construction used, the device set up the weight box at the both ends of base, can solve above-mentioned technical problem through adding the pouring weight in the weight box. In addition, the device is also provided with a rotatable warning indicator, and the protection safety of the device can be further improved through a prompt structure on the side wall of the warning indicator.
In order to achieve the above object, the technical solution of the present invention is as follows.
The utility model provides a protector that road engineering construction was used, includes base and attention device, the device still includes:
the 2 weight boxes are symmetrically arranged at two ends of the base;
2 mounting components which are arranged on two sides of the warning indicator and are detachably connected with the corresponding weight box;
the two sides of the lower end of the warning device are provided with rotating rods, and each rotating rod is rotatably connected with the corresponding mounting component;
the upper end both sides of attention device all are equipped with adjusting screw, every all be provided with the arc hole on the installation component, every adjusting screw all passes rather than the arc hole that corresponds, and the spiro union has adjusting nut.
Further, each of the mounting assemblies includes:
the inverted U-shaped plate is arranged on one side, close to the warning indicator, of the corresponding weight box;
the T-shaped plate is arranged on the inner side of the corresponding inverted U-shaped plate and is rotatably connected with the corresponding rotating rod;
each arc-shaped hole is arranged on the corresponding inverted U-shaped plate; every the one end of T template all can dismantle rather than the falling U template that corresponds and be connected, and the other end all can dismantle with the base and be connected.
Further, the alarm includes:
the warning box body is internally provided with a storage battery;
the LED display screen is arranged on one side of the warning box body and used for providing warning;
the solar panel is arranged on the other side of the warning box body;
the warning board is arranged at the top of the warning box body, and a plurality of warning lamps are arranged on the warning board;
the storage battery is respectively electrically connected with the solar panel, the LED display screen and the warning lamp.
Furthermore, the two sides of the warning indicator are symmetrically provided with right-angled triangular supporting blocks, and the LED display screen and the solar panel are respectively arranged on the supporting blocks corresponding to the LED display screen and the solar panel.
Furthermore, an included angle alpha is formed between each inclined surface of each supporting block and the warning device, and the included angle alpha is 5-30 degrees.
Further, every the weight box is kept away from one side of attention device all is equipped with the type of falling U support, every the both sides of the type of falling U support all can be dismantled rather than the both sides of the type of falling U template that corresponds through the connecting plate and be connected.
Further, the template of falling U includes first template of falling U and the second template of falling U, the symmetry is equipped with 2 through-holes on the first template of falling U, first template of falling U is close to one side of alarm is equipped with the receipts pole, the both ends of receipts pole all through the connecting piece with first template of falling U is connected, be equipped with 2 automatic ropewinders on the receipts pole, every all be equipped with the connection rope on the automatic ropewinder, the second template of falling U is kept away from one side symmetry of alarm is equipped with 2 buckles, every the one end of connecting the rope all passes rather than the through-hole that corresponds, and can dismantle through movable buckle rather than the buckle that corresponds and be connected.
Furthermore, the height of each T-shaped plate is equal to or less than that of the corresponding weight box, and each T-shaped plate is detachably connected with the side wall of the corresponding weight box; the width of each T-shaped plate is equal to the width of one side, close to the T-shaped plate, of the corresponding weight box.
Further, every the T template all includes diaphragm and riser, every the both ends of diaphragm all joint in the inboard rather than the U template that corresponds, every the one end of riser all peg graft in on the base, the other end all pegs graft in the middle part rather than the diaphragm that corresponds.
Further, the U-shaped board that falls includes arc connecting portion and is located extension on the arc connecting portion both ends, the arc hole set up in the middle part of arc connecting portion, every the lower extreme of extension all with the connection can be dismantled to the base, the equal joint in the both ends of T template on the extension at arc connecting portion both ends.
Furthermore, the both ends of base all the symmetry be equipped with the lug, every the bottom of weight box all is equipped with the spacing recess rather than the lug looks adaptation that corresponds, every the lug all pegs graft in rather than the spacing recess that corresponds, and can dismantle rather than the weight box that corresponds through the mounting and be connected.
Further, all sides of the base are evenly provided with a plurality of support legs, all sides of the base are evenly provided with 4 universal traveling wheels and each universal traveling wheel is provided with a fixing screw rod, the base is provided with 4 threaded holes matched with the corresponding fixing screw rods, each fixing screw rod penetrates through the corresponding threaded hole, and the screw joint is provided with a fastening nut.
The utility model provides a pair of protector that road engineering construction used has following beneficial effect:
the device has set up the attention device on the base, can provide the warning to pedestrian and vehicle through the suggestion structure on the attention device lateral wall, improves the security of protection, avoids the unnecessary incident to take place. Wherein, be provided with the installation component that is used for installing the attention device in the both sides of attention device, be provided with the arc hole on the installation component, because the bottom both sides and the installation component rotatable coupling of attention device, the adjusting screw of attention device top both sides then can follow the rotation of dwang and remove along the arc hole to fix through adjusting nut. Thereby conveniently carry out rotation regulation to the alarm to the warning demand that adapts to different slope road surfaces.
The weight boxes are arranged on the two sides of the warning indicator, and appropriate weight materials can be added into the weight boxes, so that local materials are obtained, and the applicability range is improved. The counterweight material can select fragment of brick, water, silt or planting soil, keeps the device's focus stable through the weight box of both sides, improves installation stability.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of an alarm in embodiment 1 of the present invention.
Fig. 3 is a cross-sectional view of the alarm in embodiment 1 of the present invention.
Fig. 4 is a schematic structural diagram of the base, the weight box, and the mounting assembly in embodiment 1 of the present invention.
Fig. 5 is a schematic structural view of a base and a weight box in embodiment 1 of the present invention.
Fig. 6 is a schematic view of a connection structure of 2 protection devices in embodiment 1 of the present invention.
Fig. 7 is a schematic structural view of a portion a in fig. 6.
In the figure: 1. a base; 101. a bump; 102. a support leg; 103. universal traveling wheels; 104. fixing the screw rod; 105. fastening a nut; 2. an alarm; 201. rotating the rod; 202. adjusting the screw rod; 203. adjusting the nut; 204. an LED display screen; 205. a solar panel; 206. a warning board; 207. a warning light; 208. a storage battery; 209. a control switch; 210. a wireless transmission module; 211. a support block; 3. a weight box; 301. a limiting groove; 4. an inverted U-shaped plate; 401. an arc-shaped hole; 402. a through hole; 403. rolling up the rod; 404. an automatic rope winder; 405. connecting ropes; 406. a movable buckle; 407. a retaining ring; 5. a T-shaped plate; 6. an inverted U-shaped bracket.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The embodiment provides a protector that road engineering construction was used, as shown in fig. 1, the device includes base 1, attention device 2, 2 weight boxes 3 and 2 installation component.
Wherein, the alarm 2 is arranged in the middle of the upper side of the base 1; the two ends of the base 1 are symmetrically provided with weight boxes 3; one side that every weight box 3 is close to attention device 2 all is equipped with the installation component that is used for installing attention device 2, and every installation component all can dismantle rather than the weight box that corresponds and be connected.
Both sides of the lower end of the warning indicator 2 are provided with rotating rods 201, and each rotating rod 201 is rotatably connected with the corresponding mounting component;
the upper end both sides of attention device 2 all are equipped with adjusting screw 202, all are provided with arc hole 401 on every installation component, and every adjusting screw 202 all passes rather than the arc hole 401 that corresponds, and the spiro union has adjusting nut 203.
In this embodiment, the device has set up attention device 2 on base 1, can provide the warning to pedestrian and vehicle through the suggestion structure on the 2 lateral walls of attention device, improves the security of protection, avoids the unnecessary incident to take place. Wherein, be provided with the installation component that is used for installing attention device 2 in the both sides of attention device 2, be provided with arc hole 401 on the installation component, because dwang 201 and installation component rotatable coupling of the bottom both sides of attention device 2, adjusting screw 202 of 2 top both sides of attention device then can follow the rotation of dwang 201 and move along arc hole 401 to fix through adjusting nut 203. Thereby conveniently carry out rotation regulation to attention device 2 to the warning demand that adapts to different slope road surfaces.
The weight boxes 3 are arranged on the two sides of the warning indicator 2, and appropriate weight materials can be added into the weight boxes 3, so that local materials are obtained, and the applicability range is improved. The counterweight material can select fragment of brick, water, silt or planting soil, and weight box 3 through both sides keeps the device's focus stable, improves installation stability.
Referring to fig. 1 and 4 together, this embodiment provides an embodiment in which each of the mounted assemblies includes an inverted U-shaped plate 4 and a T-shaped plate 5.
The inverted U-shaped plate 4 is arranged on one side, close to the warning indicator 2, of the corresponding weight box 3; each arc-shaped hole 401 is arranged on the corresponding inverted U-shaped plate 4; here, the bottom of the inverted U-shaped plate 4 is fixed on the base, and the inner side wall of the inverted U-shaped plate is detachably connected with the corresponding weight box through the L-shaped fixing sheet, so that the inverted U-shaped plate can be stably installed on the base.
Wherein, the board 4 of falling U includes arc connecting portion and is located extension on the arc connecting portion both ends, arc hole 401 sets up in the middle part of arc connecting portion, and the lower extreme of every extension all can be dismantled with base 1 and be connected, and the equal joint in the extension at arc connecting portion both ends in both ends of T template 5.
Wherein, every T template 5 all includes diaphragm and riser, the equal joint in the inboard of the U template 4 that falls rather than corresponding in both ends of every diaphragm, the one end of every riser all peg graft in on the base 1, the other end all pegs graft in the middle part of the diaphragm rather than corresponding, makes the inboard of installing at the U template that the T template can be stable from this.
Here, the height of each T-shaped plate 5 is equal to or less than the height of the corresponding weight box 3, and each T-shaped plate 5 is detachably connected with the side wall of the corresponding weight box 3; the width of each T-shaped plate 5 is equal to the width of the corresponding weight box 3 on the side close to the T-shaped plate 5.
In order to conveniently install the warning indicator 2, a transverse plate of the T-shaped plate 5 is provided with an installation hole for installing the rotating rod 201, and one end of the rotating rod is inserted into the installation hole corresponding to the rotating rod and is rotatably connected with the installation hole, so that the rotating angle of the warning indicator can be conveniently adjusted. Through the matching of the mounting hole and the arc-shaped hole, the adjusting screws 202 on the two sides of the top of the warning indicator 2 can rotate and move along the arc-shaped hole 401 along with the rotation of the rotating rod 201 and are fixed through the adjusting nuts 203; thereby conveniently carry out rotation regulation to attention device 2 to the warning demand that adapts to different slope road surfaces.
Referring to fig. 2 and fig. 3, the alarm 2 includes an alarm box, an LED display 204, a solar panel 205 and an alarm panel 206.
Wherein, an accommodating cavity is arranged in the warning box body, and a storage battery 208 is arranged in the accommodating cavity; can provide certain safety protection for the battery, avoid the influence of rainwater to the battery.
The LED display screen 204 is arranged at one side of the warning box body and is used for providing picture or character warning; with LED display screen setting orientation pedestrian, vehicle, through the LED display screen 204 who plays the suggestion effect on 2 lateral walls of attention device, can provide the warning to pedestrian and vehicle, improve the security of protection, avoid the unnecessary incident to take place.
The solar panel 205 is arranged on the other side of the warning box body, supplies power for the storage battery, and is arranged on one side far away from pedestrians and vehicles to play a certain protection role;
the warning board 206 is arranged on the top of the warning box body, and is provided with a plurality of warning lamps 207 for providing light warning;
the solar panel 205 is electrically connected with the storage battery 208 and supplies power to the storage battery, and the storage battery 208 is electrically connected with the LED display screen 204 and the warning lamp 207 respectively, so that the LED display screen 204 and the warning lamp 207 can work normally.
Here, a control switch 209 is arranged on one side of the warning board 206, and the storage battery 208 is electrically connected with the LED display screen 204 and the warning lamp 207 through the control switch 209; the other side of the warning board 206 is provided with a wireless transmission module 210, and is connected with a computer through the wireless transmission module 210. The LED display screen is connected through a computer and is regulated and controlled to display pictures or characters used as warning. And the LED display screen and the warning lamp are controlled to be turned on and off through the control switch.
In another embodiment provided by this embodiment, display panels are disposed on both sides of the warning box, and warning words or pictures are provided through the display panels.
In an embodiment provided by this embodiment, the two sides of the alarm 2 are symmetrically provided with supporting blocks 211 of right triangle, the supporting blocks 211 are fixedly mounted on the two sides of the alarm box, and the LED display screen 204 and the solar panel 205 are respectively mounted on the supporting blocks 211 corresponding thereto. Make the LED display screen provide a more audio-visual warning plane through the supporting shoe, make solar panel provide a plane that more can receive the sunlight irradiation angle through the supporting shoe to improve the photoelectric conversion rate. Wherein, be the contained angle alpha between the inclined plane on every supporting shoe 211 all and the attention device 2, contained angle alpha's size is 5 ~ 30, especially when 10 ~ 15 within ranges, not only can realize the safety warning to pedestrian and vehicle, can also effectively absorb solar energy to convert solar energy into the electric energy and store.
As shown in fig. 1, an inverted U-shaped bracket 6 is arranged on one side of each weight box 3 away from the warning indicator 2, and the inverted U-shaped brackets 6 are arranged at two ends of the base, so that the device is convenient to take, place and push and pull. The two sides of each inverted U-shaped support 6 are detachably connected with the corresponding inverted U-shaped plate 4 through connecting plates. That is to say, be provided with 2 connecting plates between type of falling U support 6 and the type of falling U template, and connect on type of falling U support 6 and the lateral margin of type of falling U template, play the stable installation effect to type of falling U support 6 and type of falling U template 4 to play certain effect of blockking, protecting to the weight box.
As shown in fig. 5, in order to improve the installation stability of the weight box, two ends of the base 1 are symmetrically provided with bumps 101, the bottom of each weight box 3 is provided with a limiting groove 301 matched with the corresponding bump 101, and each bump 101 is inserted into the corresponding limiting groove 301 and detachably connected with the corresponding weight box 3 through a fixing member. Through the mutual connection of the convex blocks and the limiting grooves, the weight box can be stably clamped on the base, and the weight box is prevented from displacing on the base.
Referring to fig. 6 and 7 together, in order to realize the connection and installation of two adjacent protection devices, the inverted U-shaped plate 4 comprises a first inverted U-shaped plate and a second inverted U-shaped plate, as shown in fig. 6, a first inverted U-shaped plate is disposed at the right side of the guard, a second inverted U-shaped plate is disposed at the left side of the guard, wherein, the symmetry is equipped with 2 through-holes 402 on the first template of falling U, one side that the first template of falling U is close to attention device 2 is equipped with roll-up pole 403, the both ends of roll-up pole 403 all are through vertical connection spare and first template 4 fixed connection of falling U, be equipped with 2 automatic ropewinder 404 on the roll-up pole 403, all be equipped with on every automatic ropewinder 404 and connect rope 405, the second template of falling U is kept away from attention device 2 one side symmetry and is equipped with 2 buckles 407, the through-hole 402 rather than corresponding is all passed to the one end of every connection rope 405, and can dismantle with its buckle 407 that corresponds through activity buckle 406 and be connected. That is to say, realize zonulae occludens through connecting the rope between two adjacent protector, and be provided with automatic serving device in one side of a protector for the rope is connected in the rolling, be provided with the buckle in one side of another protector, there is movable buckle at the end connection who connects the rope, movable buckle can dismantle with the buckle and be connected, because automatic serving device makes the rope of connecting remain the roll-up state all the time, will connect the rope and pull out serving device, and the lock can realize the zonulae occludens to two adjacent protectors on the buckle.
In an embodiment provided by this embodiment, as shown in fig. 1, a plurality of support legs 102 are uniformly arranged on the circumferential side of the base 1, 4 universal traveling wheels 103 are uniformly arranged on the circumferential side of the base 1, each universal traveling wheel 103 is provided with a fixing screw 104, the base 1 is provided with 4 threaded holes adapted to the corresponding fixing screws 104, each fixing screw 104 penetrates through the corresponding threaded hole, and is screwed with a fastening nut 105. Through adjusting clamping screw and fastening nut for adjust universal traveling wheel's height, make universal traveling wheel and the high difference that produces of stabilizer blade, and then be used for adjusting this protector's state, when universal traveling wheel highly is higher than the stabilizer blade, universal traveling wheel butt in the road surface, conveniently carries out the adjustment of position to this protector. When the height of the universal traveling wheels is lower than the support legs, the support legs are abutted to the road surface, and the protective device can be stably installed on the road surface.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a protector that road engineering construction was used, includes base (1) and attention device (2), its characterized in that, the device still includes:
2 weight boxes (3) symmetrically arranged at two ends of the base (1);
the 2 mounting assemblies are arranged on two sides of the warning indicator (2) and detachably connected with the corresponding weight boxes (3);
the two sides of the lower end of the warning indicator (2) are respectively provided with a rotating rod (201), and each rotating rod (201) is rotatably connected with the corresponding mounting component;
the upper end both sides of attention device (2) all are equipped with adjusting screw (202), every all be provided with arc hole (401) on the installation component, every adjusting screw (202) all pass rather than arc hole (401) that correspond, and the spiro union has adjusting nut (203).
2. The fender of claim 1, wherein each of the mounting assemblies comprises:
the inverted U-shaped plate (4) is arranged on one side, close to the warning indicator (2), of the corresponding weight box (3);
the T-shaped plate (5) is arranged on the inner side of the corresponding inverted U-shaped plate (4) and is rotatably connected with the corresponding rotating rod (201);
each arc-shaped hole (401) is arranged on the corresponding inverted U-shaped plate (4); one end of each T-shaped plate (5) is detachably connected with the corresponding inverted U-shaped plate (4), and the other end of each T-shaped plate is detachably connected with the base (1).
3. The protection device for road engineering work according to claim 1, characterized in that said warning indicator (2) comprises:
a warning box body, wherein a storage battery (208) is arranged in the warning box body;
the LED display screen (204) is arranged on one side of the warning box body and used for providing warning;
the solar panel (205) is arranged on the other side of the warning box body;
the warning board (206) is arranged at the top of the warning box body, and a plurality of warning lamps (207) are arranged on the warning board;
the storage battery (208) is electrically connected with the solar panel (205), the LED display screen (204) and the warning lamp (207) respectively.
4. The protection device for road engineering construction according to claim 3, wherein the two sides of the warning device (2) are symmetrically provided with right-angled triangular supporting blocks (211), and the LED display screen (204) and the solar panel (205) are respectively installed on the supporting blocks (211) corresponding to the LED display screen and the solar panel.
5. The protection device for road engineering construction according to claim 4, wherein an included angle α is formed between the inclined surface of each supporting block (211) and the warning indicator (2), and the included angle α is 5-30 °.
6. The protection device for road engineering construction according to claim 2, wherein an inverted U-shaped support (6) is arranged on one side of each weight box (3) far away from the warning indicator (2), and two sides of each inverted U-shaped support (6) are detachably connected with the corresponding inverted U-shaped plate (4) through connecting plates.
7. The fender for road engineering work according to claim 2, wherein, the inverted U-shaped plate (4) comprises a first inverted U-shaped plate and a second inverted U-shaped plate, 2 through holes (402) are symmetrically arranged on the first inverted U-shaped plate, a rolling rod (403) is arranged on one side of the first inverted U-shaped plate close to the warning indicator (2), both ends of the rolling rod (403) are connected with the first inverted U-shaped plate (4) through connecting pieces, the winding rod (403) is provided with 2 automatic rope winders (404), each automatic rope winder (404) is provided with a connecting rope (405), one side of the second inverted U-shaped plate, which is far away from the warning indicator (2), is symmetrically provided with 2 retaining rings (407), one end of each connecting rope (405) penetrates through the corresponding through hole (402), and is detachably connected with the corresponding retaining ring (407) through a movable buckle (406).
8. The guard device for road engineering construction according to claim 2, characterized in that the height of each T-shaped board (5) is equal to or less than the height of the corresponding weight box (3), and each T-shaped board (5) is detachably connected with the side wall of the corresponding weight box (3); the width of each T-shaped plate (5) is equal to the width of one side, close to the T-shaped plate (5), of the corresponding weight box (3).
9. The protection device for road engineering construction according to claim 1, wherein the two ends of the base (1) are symmetrically provided with bumps (101), the bottom of each weight box (3) is provided with a limiting groove (301) matched with the corresponding bump (101), and each bump (101) is inserted into the corresponding limiting groove (301) and detachably connected with the corresponding weight box (3) through a fixing member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020587129.8U CN212201545U (en) | 2020-04-17 | 2020-04-17 | Protection device for road engineering construction is used |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020587129.8U CN212201545U (en) | 2020-04-17 | 2020-04-17 | Protection device for road engineering construction is used |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212201545U true CN212201545U (en) | 2020-12-22 |
Family
ID=73833924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020587129.8U Expired - Fee Related CN212201545U (en) | 2020-04-17 | 2020-04-17 | Protection device for road engineering construction is used |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212201545U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112252830A (en) * | 2020-10-30 | 2021-01-22 | 上海市地质勘查技术研究院 | Connect stable fender device that encloses |
-
2020
- 2020-04-17 CN CN202020587129.8U patent/CN212201545U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112252830A (en) * | 2020-10-30 | 2021-01-22 | 上海市地质勘查技术研究院 | Connect stable fender device that encloses |
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Granted publication date: 20201222 |