CN111058399A - Self-dust-removing road reflector - Google Patents
Self-dust-removing road reflector Download PDFInfo
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- CN111058399A CN111058399A CN201911388888.XA CN201911388888A CN111058399A CN 111058399 A CN111058399 A CN 111058399A CN 201911388888 A CN201911388888 A CN 201911388888A CN 111058399 A CN111058399 A CN 111058399A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
- E01F9/604—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings
- E01F9/619—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings with reflectors; with means for keeping reflectors clean
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
- E01F9/529—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users specially adapted for signalling by sound or vibrations, e.g. rumble strips; specially adapted for enforcing reduced speed, e.g. speed bumps
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- Road Signs Or Road Markings (AREA)
Abstract
The invention discloses a self-dedusting type road reflector which comprises a chute arranged on the ground and a shell fixedly connected to the ground through a support rod, wherein a deceleration strip is connected in the chute in a sealing and sliding mode, a mirror surface and an arc-shaped rain shielding plate are fixedly installed on the side wall and the upper end of the shell respectively, the deceleration strip is elastically connected to the inner bottom of the chute through a plurality of groups of first springs, an air inlet is formed in the inner wall of the chute, and a telescopic air bag is fixedly connected in the shell. The invention can pump air to the telescopic air bag and store the air by arranging the exhaust mechanism, the telescopic air bag, the impeller, the driving mechanism and the cleaning mechanism, removes dust on the mirror surface by utilizing the stored air, and simultaneously can drive the impeller to rotate by the sprayed air so as to clean the mirror surface by pumping water by the cleaning mechanism, thereby thoroughly removing the dust on the mirror surface, avoiding manual cleaning and causing no damage to the mirror surface, and simultaneously having simple structure, no electronic components needing maintenance and lower cost.
Description
Technical Field
The invention relates to the technical field of municipal engineering, in particular to a self-dedusting road reflector.
Background
Due to the limitation of the visual field, a visual field dead angle is easily formed at the intersection of the curve, and a driver cannot easily find the vehicle coming from the opposite side of the curve when passing through the intersection, so that a road reflector is usually arranged at the intersection of the curve, the visual field of the driver is expanded by using an optical principle, and the probability of accidents is reduced.
However, since roads originally belong to areas with more dust, and vehicles raise a large amount of dust when driving, more dust is easily adhered to the mirror surface of a road reflector arranged at a curve intersection, and if the dust is not cleaned in time, the situation of coming vehicles on the opposite side can be greatly obstructed for a driver, so that the accident occurrence probability is increased, and since the road reflector generally has a certain height per se and is more in number, the manual cleaning is troublesome, and the labor cost is higher.
In view of the above problems, the published patent application No. CN201710662665.2 discloses an anti-fog road mirror, which comprises a pillar, a base, a convex mirror body and an annular shield plate, and is characterized in that: the base is provided with a wiper device, the wiper device comprises a wiper brush, a driving motor, a controller, a rainwater sensor and a power supply, the driving motor is arranged at the center of the base, a driving shaft of the driving motor extends out of the center of the convex mirror, and the extending end of the driving motor is provided with the wiper brush.
Although the problem of the automatic dust removal of mirror surface has been solved to above-mentioned patent, need not artifical clearance, still have following shortcoming:
the wiper device in the first and the above schemes is arranged on the mirror surface, so when the wiper device rotates to brush the mirror surface, the mirror surface is scraped by the wiper, scratches appear on the mirror surface, and a driver cannot see a scene in the mirror surface of the reflector clearly;
second, above-mentioned scheme has used precision electronic components such as rainwater inductor, timer and controller more, but because the road reflector sets up in the open air mostly, is difficult to avoid suffering the wind and blows the sun, and under this environment, various electronic components break down easily, lead to the unable normal dust removal of whole device, and these electronic components need the special messenger to maintain regularly simultaneously, and this has just increased the cost of labor again by a wide margin.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a self-dedusting road reflector which is provided with an exhaust mechanism, a telescopic air bag, an impeller, a driving mechanism and a cleaning mechanism, wherein a speed reduction belt is driven by the self weight of an automobile to pump air into the telescopic air bag and store the air until the air reaches a certain volume, the air is completely discharged and sprayed to a mirror surface through the action of the exhaust mechanism, the mirror surface is dedusted, the impeller is driven to rotate by the sprayed air, and then the cleaning mechanism is driven to pump water to clean the mirror surface, so that the dust on the mirror surface is thoroughly removed, the manual cleaning is not needed, the mirror surface is not damaged, the structure is simple, electronic components which need to be maintained are not needed, and the cost is lower.
In order to achieve the purpose, the invention adopts the following technical scheme:
a self-dedusting road reflector comprises a chute arranged on the ground and a shell fixedly connected on the ground through a support rod, wherein a deceleration strip is connected in the chute in a sealing and sliding manner, a mirror surface and an arc-shaped flashing board are fixedly installed on the side wall and the upper end of the shell respectively, the deceleration strip is elastically connected at the inner bottom of the chute through a plurality of groups of first springs, an air inlet is formed in the inner wall of the chute, a telescopic air bag is fixedly connected in the shell, the lower end of the chute is communicated with the telescopic air bag through an air guide cavity, a first check valve which only allows air to flow from bottom to top is installed at the communication position of the air guide cavity and the telescopic air bag, a plastic piece is fixedly connected at the upper end of the telescopic air bag, a rectangular groove is formed at the upper end of the plastic piece, an air outlet which is communicated with, the exhaust mechanism is used for completely discharging air in the telescopic air bag when the telescopic air bag expands to a certain degree, the arc-shaped air cavity is formed in the side wall of the arc-shaped flashing, the lower end of the arc-shaped flashing is provided with an air jet communicated with the arc-shaped air cavity, and the arc-shaped air cavity is communicated with the inside of the shell through an air outlet pipe.
Preferably, exhaust mechanism includes the gleitbretter of sealed sliding connection bottom in the rectangular channel and the permanent magnetism piece of fixed connection in shell inner wall upper end, the gleitbretter passes through second spring and rectangular channel inner wall elastic connection, there is the damping between gleitbretter and the rectangular channel bottom, the gleitbretter has magnetism.
Preferably, the interior top of shell rotates through the pivot and is connected with the impeller, fixedly connected with upper end is equipped with the open-ended water tank on the lateral wall of shell, the upper end fixedly connected with device case of shell, the device incasement is installed and is used for the wiper mechanism to mirror surface cleaning, the device incasement still installs the actuating mechanism who is used for driving the wiper mechanism action.
Preferably, the cleaning mechanism comprises a sliding plug which is connected in the device box in a sealing and sliding mode, the end portion of the device box is communicated with the water tank through a water inlet pipe, the water inlet end of the water inlet pipe is immersed below the liquid level in the water tank, a third one-way valve which only allows air to flow into the device box from the water inlet pipe is installed at the position where the water inlet pipe is communicated with the device box, the end portion of the device box is communicated with the arc-shaped air cavity through a water outlet pipe, and a second one-way valve which only allows air to flow from bottom to top is installed at the position where the water outlet pipe.
Preferably, the driving mechanism comprises a disc and a connecting rod, the upper end of the rotating shaft penetrates into the device box, the disc is coaxially and fixedly connected to the upper end of the rotating shaft, one end of the connecting rod is rotatably connected to the non-axial center of the disc, and the other end of the connecting rod is rotatably connected to the sliding plug.
The invention has the following beneficial effects:
1. by arranging the deceleration strip, the telescopic air bag, the exhaust mechanism and the arc-shaped air cavity, when the automobile runs onto the deceleration strip, air in the chute can be pumped into the telescopic air bag, after the automobile is used for many times, the air stored in the telescopic air bag can be ejected at high speed and enters the arc-shaped air cavity through the air outlet pipe, and finally the air is ejected onto the mirror surface from the air outlet, so that dust on the mirror surface is removed, and the cleaning effect on the mirror surface is achieved;
2. by arranging the telescopic air bag, the exhaust mechanism and the permanent magnet, when the telescopic air bag expands until the sliding sheet is flush with the permanent magnet, the permanent magnet pushes the sliding sheet away from the exhaust port, when the sliding sheet is pushed by the repulsion force of the permanent magnet, the sliding sheet can slowly slide under the action of the elastic force of the spring, the exhaust port can be sealed again after a period of time, and the air in the telescopic air bag can be completely exhausted within the period of time, so that the effect of fully removing dust on the mirror surface is achieved;
3. by arranging the cleaning mechanism and the driving mechanism, the impeller can be driven to rotate by taking high-speed sprayed air in the telescopic air bag as power, the driving mechanism drives the sliding plug to reciprocate, water in the water tank is pumped into the arc-shaped air cavity, and meanwhile, high-speed airflow can also accelerate water flow in the arc-shaped air cavity, so that air and water impurities which are sprayed at high speed from the air nozzle finally can form an excellent cleaning effect on the mirror surface, dust adhered to the mirror surface is thoroughly removed without manual cleaning, and the mirror surface cannot be damaged;
4. the road reflector has the advantages that various precise electric components needing to be maintained are not required, the manufacturing cost is low, meanwhile, the special person is not required to maintain regularly, the labor cost is low, and the practical applicability of the road reflector is enhanced.
Drawings
FIG. 1 is a schematic structural view of a self-dusting road mirror according to the present invention;
FIG. 2 is an enlarged view of the structure at A in FIG. 1;
FIG. 3 is a schematic structural view of example 2;
fig. 4 is an enlarged schematic view of the structure at B in fig. 3.
In the figure: the automatic water supply device comprises a sliding chute 1, a supporting rod 2, a shell 3, a mirror surface 4, a speed reducing belt 5, a first spring 6, an air inlet 7, a telescopic air bag 8, an air guide cavity 9, a first check valve 10, a permanent magnet 11, an arc rain shielding plate 12, an arc air cavity 13, an air jet 14, an air outlet 15, an air outlet 16, an air outlet 17, a plastic part 18, a rectangular groove 19, a sliding sheet 19, a second spring 20, an impeller 21, a water tank 22, a water inlet pipe 23, a water outlet pipe 24, a disc 25, a connecting rod 26, a sliding plug 27, a second check valve 28 and a third check valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-2, a from dust type road reflector, including seting up at the spout 1 on ground and the shell 3 of 2 fixed connection on ground through the bracing piece, sealed sliding connection has deceleration strip 5 in the spout 1, fixed mounting has mirror surface 4 on the lateral wall of shell 3, the upper end fixedly connected with arc flashing 12 of shell 3, deceleration strip 5 passes through the interior bottom of multiunit first spring 6 elastic connection at spout 1, be provided with air inlet 7 on the spout 1 inner wall, wall portion fixedly connected with flexible gasbag 8 in shell 3, the tip passes through air guide cavity 9 and flexible gasbag 8 intercommunication under the spout 1, and air guide cavity 9 and flexible gasbag 8 intercommunication department install the first check valve 10 that only allows the air from up flowing down.
The air inlet 7 is communicated to a far position, and the air at the far position is relatively clean, so that when the deceleration strip 5 moves upwards, the air sucked into the chute 1 is relatively clean, and it should be noted that the expansion direction of the telescopic air bag 8 is a vertical direction, namely, after the telescopic air bag 8 is inflated and expanded, the upper end of the telescopic air bag moves upwards along the vertical direction.
The upper end fixedly connected with working of plastics 17 of flexible gasbag 8, rectangular channel 18 has been seted up to working of plastics 17 upper end, and the gas vent 16 that all communicates with rectangular channel 18 and flexible gasbag 8 is seted up to working of plastics 17 lower extreme, installs exhaust mechanism in the rectangular channel 18, and exhaust mechanism is used for the air escape in the flexible gasbag 8 completely when flexible gasbag 8 expands to the certain extent.
Exhaust mechanism includes sealed sliding connection at the gleitbretter 19 of bottom in rectangular channel 18 and fixed connection at the permanent magnetism piece 11 of 3 inner walls upper end of shell, and gleitbretter 19 passes through second spring 20 and rectangular channel 18 inner wall elastic connection, has the damping between gleitbretter 19 and the bottom in the rectangular channel 18, and gleitbretter 19 has magnetism.
It should be noted that, when the sliding vane 19 and the permanent magnet 11 are in the flush position, the sliding vane 19 and the permanent magnet 11 are in the same polarity and opposite to each other, and a repulsive force is generated between the sliding vane 19 and the permanent magnet 11, and the repulsive force overcomes the resistance force of the second spring 20 and the damping of the sliding vane 19 and the bottom in the rectangular slot 18, so as to push the sliding vane 19 away from the exhaust port 16; and the elasticity of the second spring 20 is slightly larger than the damping of the slide 19 and the bottom of the rectangular groove 18, when the slide 19 is pushed by the repulsion force of the permanent magnet 11, the slide 19 will slowly slide under the action of the elasticity of the second spring 20, and the exhaust port 16 will be sealed again after a while.
An arc-shaped air cavity 13 is arranged in the side wall of the arc-shaped rain shield 12, the lower end of the arc-shaped rain shield 12 is provided with an air jet 14 communicated with the arc-shaped air cavity 13, and the arc-shaped air cavity 13 is communicated with the inside of the shell 3 through an air outlet pipe 15.
Further, the volume of the chute 1 is much smaller than that of the telescopic airbag 8, so that the telescopic airbag 8 can rise to the position where the plastic part 17 is flush with the permanent magnet blocks 11 only when the vehicle runs through the speed bump 5 for multiple times and the telescopic airbag 8 is inflated through the chute 1 for multiple times.
A deceleration strip 5 is generally arranged at a corner of a road, when a vehicle runs onto the deceleration strip 5 every time, the deceleration strip 5 is pressed to move downwards by the dead weight of the vehicle, air in a chute 1 is extruded into a telescopic air bag 8 through an air guide cavity 9, an exhaust port 16 is sealed by a sliding sheet 19 in an initial state, so that the telescopic air bag 8 is inflated and expanded to drive a plastic part 17 at the upper end of the telescopic air bag to move upwards, after the vehicle runs away, the deceleration strip 5 is reset under the action of a first spring 6, the air enters the chute 1 from an air inlet 7, when the plastic part 17 reaches a position flush with a permanent magnet 11 after the vehicle runs through the deceleration strip 5 for many times, the sliding sheet 19 is pushed away from the exhaust port 16 by the repulsive force between the permanent magnet 11 and the sliding sheet 19, and at the moment, the air in the telescopic air;
when the air in the telescopic air bag 8 is sprayed out partially, the telescopic air bag 8 descends, the sliding sheet 19 and the permanent magnet block 11 are staggered, the horizontal component force of the repulsive force of the permanent magnet block 11 to the sliding sheet 19 is very small and can be ignored, at the moment, the sliding sheet 19 can slowly slide under the action of the elastic force and the damping of the second spring 20, and the exhaust port 16 is sealed again after a period of time, in the period, the air in the telescopic air bag 8 can be completely sprayed out at high speed and enters the arc-shaped air cavity 13 from the air outlet pipe 15, and is sprayed on the mirror surface 4 from the air spraying port 14 finally, so that the dust adhered to the mirror surface 4 is removed, the cleaning effect on the mirror surface 4 is achieved, the dust on the mirror surface 4 is prevented from obstructing the view of a driver, meanwhile, the mirror surface is not required to be cleaned manually, the labor cost is saved, and the mirror surface 4 is prevented from being scratched.
Example 2
Referring to fig. 3 to 4, the difference from embodiment 1 is that: the interior top of shell 3 rotates through the pivot and is connected with impeller 21, and fixedly connected with upper end is equipped with open-ended water tank 22 on the lateral wall of shell 3, and the upper end fixedly connected with device case 30 of shell 3 installs in the device case 30 and is used for the abluent wiper mechanism of mirror surface 4, still installs the actuating mechanism who is used for driving the wiper mechanism action in the device case.
The cleaning mechanism comprises a sliding plug 27 which is connected in the device box 30 in a sealing and sliding mode, the end portion of the device box 30 is communicated with the water tank 22 through a water inlet pipe 23, the water inlet end of the water inlet pipe 23 is immersed below the liquid level in the water tank 22, a third one-way valve 29 which only allows air to flow from the water inlet pipe 23 to the inside of the device box 30 is installed at the communication position of the water inlet pipe 23 and the device box 30, the end portion of the device box 30 is communicated with the arc-shaped air cavity 13 through a water outlet pipe 24, and a second one-way valve 28 which only allows air to flow from bottom to top is installed at.
The water tank 22 may contain rainwater or may be filled with water manually after the water therein is consumed.
It should be noted that the water inlet pipe 23 and the water outlet pipe 24 are located at the same end of the device box 30, and the other end of the device box 30 is communicated with the outside to maintain a constant pressure, when the sliding plug 27 slides left and right, water in the water tank 22 can be sucked into the device box 30 and then discharged into the arc air chamber 13 by the change of the air pressure in the device box 30, and the water can be accelerated by the air jetted from the telescopic air bag 8 at a high speed, so that air and water impurities jetted from the air jet port 14 at a high speed finally can form an excellent cleaning effect on the mirror surface 4, and dust adhered to the mirror surface 4 can be removed.
The driving mechanism comprises a disc 25 and a connecting rod 26, the upper end of the rotating shaft penetrates into the device box 30, the disc 25 is coaxially and fixedly connected to the upper end of the rotating shaft, one end of the connecting rod 26 is rotatably connected to the non-axial center of the disc 25, and the other end of the connecting rod 26 is rotatably connected to the sliding plug 27.
After the high-speed blowout of air in the flexible gasbag 8, discharge in the outlet duct 15 afterwards, in this process, the air can pass through impeller 21, thereby drive impeller 21 rotates, impeller 21 drives the disc 25 rotatory, disc 25 passes through connecting rod 26 drive sliding plug 27 along horizontal direction reciprocating motion, and then go into arc air cavity 13 with the water in the water tank 22 through inlet tube 23 and outlet pipe 24 pump, still there is spun high velocity air current in the flexible gasbag 8 to pass through in the arc air cavity 13 this moment, under the high velocity air effect, rivers in the arc air cavity 13 are also accelerated, finally locate at jet 14 with the air and the high-speed injection of the form of water misce.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The utility model provides a from dust type road reflector, includes spout (1) of seting up on ground and shell (3) through bracing piece (2) fixed connection on ground, sealed sliding connection has deceleration strip (5) in spout (1), the lateral wall and the upper end of shell (3) are fixed mounting respectively has mirror surface (4) and arc flashing (12), its characterized in that, deceleration strip (5) are through multiunit first spring (6) elastic connection in the interior bottom of spout (1), be provided with air inlet (7) on spout (1) inner wall, fixed connection has flexible gasbag (8) in shell (3), tip passes through air guide cavity (9) and flexible gasbag (8) intercommunication under spout (1), air guide cavity (9) and flexible gasbag (8) intercommunication department install first check valve (10) that only allow the air to flow from down to up, flexible gasbag (8) upper end fixedly connected with working of plastics (17), rectangular channel (18) have been seted up to working of plastics (17) upper end, gas vent (16) that all communicate with rectangular channel (18) and flexible gasbag (8) are seted up to working of plastics (17) lower extreme, install exhaust mechanism in rectangular channel (18), exhaust mechanism is used for completely discharging the air in flexible gasbag (8) when flexible gasbag (8) expand to the certain degree, arc air cavity (13) have been seted up in arc flashing (12) lateral wall, arc flashing (12) lower extreme all is equipped with jet orifice (14) with arc air cavity (13) intercommunication, arc air cavity (13) are through outlet duct (15) and the inside intercommunication of shell (3).
2. The self-dedusting road mirror according to claim 1, wherein the exhaust mechanism comprises a sliding piece (19) hermetically and slidably connected to the bottom in the rectangular groove (18) and a permanent magnet block (11) fixedly connected to the upper end of the inner wall of the housing (3), the sliding piece (19) is elastically connected with the inner wall of the rectangular groove (18) through a second spring (20), damping exists between the sliding piece (19) and the bottom in the rectangular groove (18), and the sliding piece (19) has magnetism.
3. The self-dedusting road reflector according to claim 1, wherein an impeller (21) is rotatably connected to the inner top of the casing (3) through a rotating shaft, a water tank (22) with an opening at the upper end is fixedly connected to the side wall of the casing (3), an apparatus box (30) is fixedly connected to the upper end of the casing (3), a cleaning mechanism for cleaning the mirror surface (4) is installed in the apparatus box (30), and a driving mechanism for driving the cleaning mechanism to act is also installed in the apparatus box.
4. The self-dusting road mirror as claimed in claim 3, wherein the cleaning mechanism comprises a sliding plug (27) which is slidably and sealingly connected in the device box (30), the end of the device box (30) is communicated with the water tank (22) through an inlet pipe (23), the inlet end of the inlet pipe (23) is submerged below the liquid level in the water tank (22), a third one-way valve (29) which only allows air to flow from the inlet pipe (23) to the device box (30) is arranged at the position where the inlet pipe (23) is communicated with the device box (30), the end of the device box (30) is communicated with the arc-shaped air cavity (13) through an outlet pipe (24), and a second one-way valve (28) which only allows air to flow from bottom to top is arranged at the position where the outlet pipe (24) is communicated with the device box (30).
5. The self-dusting road mirror as claimed in claim 4, wherein the driving mechanism comprises a disc (25) and a connecting rod (26), the upper end of the rotating shaft penetrates into the device box (30), the disc (25) is coaxially and fixedly connected to the upper end of the rotating shaft, one end of the connecting rod (26) is rotatably connected to the disc (25) at a non-axial center, and the other end of the connecting rod (26) is rotatably connected to the sliding plug (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911388888.XA CN111058399A (en) | 2019-12-30 | 2019-12-30 | Self-dust-removing road reflector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911388888.XA CN111058399A (en) | 2019-12-30 | 2019-12-30 | Self-dust-removing road reflector |
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| CN111058399A true CN111058399A (en) | 2020-04-24 |
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| CN201911388888.XA Withdrawn CN111058399A (en) | 2019-12-30 | 2019-12-30 | Self-dust-removing road reflector |
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Cited By (7)
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| CN111623290A (en) * | 2020-06-02 | 2020-09-04 | 凌垚峰 | From dust fall heat dissipation formula road landscape lamp |
| CN111673901A (en) * | 2020-06-16 | 2020-09-18 | 郭和宣 | Thereby realize clay agitated vessel of even stirring based on gravity-feed tank |
| CN111706397A (en) * | 2020-06-23 | 2020-09-25 | 贵州理工学院 | Warning device of tunnel corner of guide function |
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| CN112359746A (en) * | 2020-11-10 | 2021-02-12 | 郭俊 | Automatically cleaning road reflector |
| CN112709164A (en) * | 2020-12-28 | 2021-04-27 | 杨海霞 | Road safety system for curve |
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