CN108757667B - Variable information board convenient to overhaul - Google Patents
Variable information board convenient to overhaul Download PDFInfo
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- CN108757667B CN108757667B CN201810616568.4A CN201810616568A CN108757667B CN 108757667 B CN108757667 B CN 108757667B CN 201810616568 A CN201810616568 A CN 201810616568A CN 108757667 B CN108757667 B CN 108757667B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20954—Modifications to facilitate cooling, ventilating, or heating for display panels
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20954—Modifications to facilitate cooling, ventilating, or heating for display panels
- H05K7/20972—Forced ventilation, e.g. on heat dissipaters coupled to components
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
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Abstract
A variable information board convenient to overhaul, through connecting the crossbeam that fixes the variable information board with the right pillar stand can be dismantled, the left pillar stand sets up into the syllogic structure, and drive the middle part to rotate through the actuating unit, in the course of rotating, reduce the height of crossbeam and variable information board, thus easy to overhaul and change; and in order not to influence the current of road, the top part and the crossbeam of left stand pass through the rolling bearing outer lane and connect, and rotate by another power unit drive crossbeam, thereby rotate it to road one side and maintain, thereby solved and overhauld the problem that the in-process influences the road current, overhaul the workman and can overhaul and change variable information board on roadside ground in addition, compare with the current mode of overhauing on climbing the crossbeam, the security obtains fine guarantee, maintenance efficiency has also obtained the improvement.
Description
Technical Field
The invention relates to a variable information board used in the field of intelligent traffic, in particular to a variable information board convenient to overhaul.
Background
The variable information board is important equipment for traffic condition and traffic guidance information release, and is traffic information display equipment using led light-emitting device as basic display unit, and has the function of displaying graph and character. According to the instruction information of traffic, weather and command and dispatch departments, the operator can issue various announcements and information to the variable information board, thereby effectively inducing the traffic flow, improving the traffic transport capacity of the road network and providing high-quality service for the safe and rapid driving of drivers.
The variable information board is generally installed above a road by adopting a portal frame or is installed on one side of the road by adopting an upright post, and due to the influence of natural conditions such as rainwater, dust, strong wind, temperature and the like, an LED display assembly in the variable information board is frequently damaged and needs to be overhauled and replaced; for the variable information board with the upright post arranged on one side of the road, a maintainer can easily maintain the variable information board by adopting a special climbing tool; for the variable information board which adopts the portal frame to be installed above the road, if the variable information board is maintained by adopting the mode, the maintenance is very troublesome, the variable information board is positioned above the road, great potential safety hazard is formed to the maintenance personnel, and the passing of the road is influenced if the variable information board is disassembled to be maintained.
Disclosure of Invention
In order to solve the problem that the variable information board installed above a road by adopting a portal frame is inconvenient to overhaul and replace after problems occur, the invention provides the variable information board convenient to overhaul.
The technical scheme adopted by the invention for solving the technical problems is as follows: a variable information board convenient to overhaul comprises a cross beam used for fixing the variable information board above a road, a left upright post and a right upright post used for supporting the cross beam, wherein the top end of the right upright post is detachably connected with the right end of the cross beam; the left upright post comprises a hollow tubular bottom part, a middle part and a top part, the middle part is matched and connected with the internal thread of the top part through external threads, a bearing is fixed at the bottom end of the middle part, and an outer ring of the bearing extends into the bottom part and is fixedly connected with the bottom part; the outer wall of the middle part is fixedly provided with a driving gear, and the driving gear is driven by the power output by the power mechanism I to drive the middle part to rotate; the top end of the top part is provided with a rotating bearing, and an inner ring of the rotating bearing is fixedly connected with the outer wall of the top part, so that the middle part extends out of or retracts into the top part in the rotating process, and the height of the cross beam is adjusted; driving teeth are distributed on an outer ring surrounding the rotating bearing, so that the power output by the power mechanism II drives the outer ring of the rotating bearing to rotate independently through the driving teeth; the outer ring of the rotating bearing is fixedly connected with the cross beam, so that the rotating bearing drives the cross beam to rotate in the rotating process, the variable information board is rotated to one side of the road, the middle part of the variable information board is driven to rotate by the power mechanism I and the driving gear, the height of the cross beam is reduced, and the variable information board is convenient to overhaul.
One preferred embodiment of the present invention is: the left end of the cross beam horizontally extends out of the left upright post, a base plate is fixed to the left end of the cross beam through a downward connecting plate, and the power mechanism II is fixed to the base plate; the base plate is provided with a through hole, a downward steel rope is arranged in the through hole, the bottom end of the steel rope is provided with a fixed disc, and when the variable information board is overhauled, after the beam is separated from the top end of the right upright post and fixed, the weight of the variable information board and the beam is balanced by placing a heavy object on the fixed disc, so that the beam can rotate conveniently.
Another preferred embodiment of the present invention is: the top parts of the left upright post and the right upright post are connected with the cross beam through an elastic mechanism, the elastic mechanism comprises an inverted conical steel connecting seat with a through hole in the center and a steel base fixed at the top end of the inner ring of the rotating bearing or the right upright post, the center of the top part of the steel base is provided with an inverted conical connecting cavity matched with the steel connecting seat, the side wall of the connecting cavity is distributed with a plurality of positioning clamping strips, and the positioning clamping strips are matched with grooves distributed on the surface of the steel connecting seat to realize the connection of the steel connecting seat and the steel base; a cylindrical channel is arranged at the center of the bottom of the connecting cavity, a key groove with an upward opening is formed in the side wall of the cylindrical channel, a connecting column with a driving key is arranged at the bottom of the cross beam, the connecting column penetrates into the cylindrical channel after penetrating through a through hole in the center of the steel connecting seat, and the driving key on the connecting column is clamped into the key groove, so that power is transmitted to the cross beam from the steel base; the top of the steel connecting seat is provided with a steel sleeve surrounding the connecting column, a rubber sleeve surrounding the connecting column is arranged in the steel sleeve, and the tops of the steel sleeve and the rubber sleeve are provided with clamping grooves matched with the appearance of the cross beam, so that the tops of the steel sleeve and the rubber sleeve exceed the cross beam and extend to the middle position of the cross beam; a plurality of layers of annular metal plates which are not in contact with each other are arranged along the length direction of the connecting column, the annular metal plates are horizontally distributed, the outer edges of the annular metal plates are attached to the inner wall of the rubber sleeve, an elastic sleeve is filled around the rubber sleeve in a cavity between the rubber sleeve and the steel sleeve, the bottom of the elastic sleeve is flush with the bottom of the steel sleeve, and a buffer deformation gap is formed between the top of the elastic sleeve and the lowest part of the cross beam; the elastic sleeve is made of rubber, a plurality of springs parallel to the annular metal plate are distributed in the rubber, and two ends of the springs respectively extend to the inner wall surface and the outer wall surface of the elastic sleeve.
In the above embodiment, the method for preparing the elastic sleeve comprises:
1) firstly, selecting two symmetrical strip-shaped plates and two rectangular plates, bonding one strip-shaped plate on a horizontal base plate, and then bonding and fixing the two rectangular plates and two ends of the strip-shaped plate, thereby forming a shape of a rectangle on the horizontal base plate;
2) adhering a plurality of springs with the same length on the surface of the other strip-shaped plate, after the adhesion is finished, adhering and fixing two ends of the strip-shaped plate with two rectangular plates in the shape of the rectangle, and enabling the free ends of the springs adhered on the surface of the strip-shaped plate to abut against the surface of the other strip-shaped plate in the shape of the rectangle, thereby forming a strip-shaped cavity internally distributed with a plurality of springs;
3) melting natural rubber in an internal mixer, filling the natural rubber into the strip-shaped cavity through an opening at the top of the strip-shaped cavity, and naturally cooling to form a strip-shaped rubber plate containing a spring inside;
4) the two ends of the strip-shaped rubber plate in the length direction are bonded together to form the elastic sleeve.
In the last embodiment, a metal sleeve is arranged around the outer edge of the top of the steel base, so that when the steel connecting seat is clamped into the connecting cavity on the steel base, the top of the metal sleeve extends to the middle position of the steel sleeve, and a gap of 1-2mm is formed between the inner wall of the metal sleeve and the outer wall of the steel sleeve.
Yet another embodiment of the present invention is: the variable information board comprises a shell, the shell is formed by sleeving a small rectangular frame and a large rectangular frame surrounding the small rectangular frame, the two rectangular frames are connected in a sealing mode through a plate-shaped piece to form a rectangular annular cavity, a partition plate with ventilation holes densely distributed on the surface is detachably arranged in the middle of the small rectangular frame, the internal space of the small rectangular frame is divided into two parts by the partition plate, one part of the internal space is used for installing an LED display panel, a cavity is formed between the LED display panel and the partition plate, and the cavity is communicated with the rectangular annular cavity through a ventilation channel; an openable access door is arranged on the other side surface opposite to the LED display panel, a gap is also formed between the access door and the partition plate, and a shutter inclining downwards is arranged on the access door; the outside of shutter is covered with the first dust guard of L shape and the second dust guard of falling the L shape in proper order, wherein, the lower part at the access door is fixed to the bottom of first dust guard, the top of shutter is crossed at the top, the upper portion at the access door is fixed at the top of second dust guard, the bottom extends to the lower part position of access door, and have the clearance between second dust guard and the first dust guard and between first dust guard and the shutter, thereby form the continuous U-shaped passageway of falling of communicateing shutter and external environment, be provided with the felt layer on the wall that second dust guard and first dust guard lie in the U-shaped passageway.
In an improved scheme of the above embodiment of the invention, an upward convex arc-shaped reflecting cover is arranged at the top of the shell, and an arc-shaped cavity is defined between the arc-shaped reflecting cover and the top of the shell; a rain sheltering eaves which inclines downwards is arranged above one side of the LED display panel on the shell, and the bottom of the rain sheltering eaves is flush with the top of the LED display panel.
The other improvement scheme of the previous embodiment of the invention is that the left upright post, the right upright post and the cross beam are all of hollow tubular structures, the bottom of the left upright post is fixed in a pit sealed by a cover plate, an exhaust fan is arranged in the left upright post, an air inlet of the exhaust fan pumps cold air in the pit out and sends the cold air into the left upright post, the cold air enters a rectangular annular cavity of the shell along the left upright post and the cross beam in sequence, and then enters a cavity between the LED display panel and the partition plate through a ventilation channel to cool the electronic components; the exhaust fan, the power mechanism I and the power mechanism II are all powered by a solar cell panel; when the left upright post and the right upright post are connected with the cross beam through the elastic mechanism, the connecting post is of a hollow structure, the lower end of the connecting post penetrates through the inner ring of the rotating bearing and then is inserted into the top part of the left upright post, and therefore cold air is sent into the cross beam from the inside of the left upright post; in order to ensure sealing, a rubber sealing ring can be arranged at the joint of the connecting column and the top part.
Compared with the prior art, the invention has the following beneficial effects:
1) the crossbeam for fixing the variable information board is detachably connected with the right upright post, the left upright post is arranged into a three-section structure, and the middle part is driven to rotate by the power mechanism, so that the heights of the crossbeam and the variable information board are reduced in the rotating process, and the maintenance and the replacement are convenient; in order to avoid influencing the road traffic, the top part of the left upright post is connected with the cross beam through the outer ring of the rotating bearing, and the cross beam is driven to rotate by another power mechanism, so that the cross beam is rotated to one side of the road for maintenance, and the problem of influencing the road traffic in the maintenance process is solved;
2) the invention can detachably connect the beam and the left and right upright posts by utilizing the elastic mechanism, the elastic sleeve and the rubber sleeve are arranged in the steel sleeve in the elastic mechanism, the connecting post is sleeved with a plurality of annular metal plates which are tightly attached to the rubber sleeve, when windy weather occurs, the resistance is transmitted to the connecting post through the beam due to large area of the variable information plate, the bottom of the connecting post is penetrated in the cylindrical channel of the steel base, the position of the connecting post is limited but still has certain movement allowance, and the upper part of the connecting post generates extrusion action on the elastic sleeve and the rubber sleeve through the annular metal plates under the action of wind power, so that the whole body generates micro-inclination at a certain angle, further the variable information plate also generates a certain inclination angle, and the action of the wind power is reduced; because the spring is arranged in the elastic sleeve, certain restoring force can be generated after the elastic sleeve is extruded, and the elastic sleeve can be reset through the annular metal plate after wind power is reduced;
3) in the invention, in order to reduce the temperature in the variable information board at high temperature, the shell of the variable information board is arranged into a rectangular frame with a rectangular annular cavity, an arc-shaped reflecting cover is arranged at the upper part of the shell to emit certain heat, and a gap is also arranged between the arc-shaped reflecting cover and the shell, thereby reducing the heat transfer; a porous partition plate is arranged between the LED display panel in the shell and the access door on the back, so that heat generated by the electronic device can be dissipated through the partition plate and the shutters on the access door; in order to realize the dustproof function, an L-shaped first dustproof plate and an inverted L-shaped second dustproof plate are arranged on the access door, the two dustproof plates form a continuous inverted U-shaped channel communicated with the shutter, and a felt layer is arranged in the channel, so that floating dust is adsorbed, and most of dust is prevented from entering the interior of the shell through the shutter;
4) in order to improve the heat dissipation effect, the left upright post, the right upright post and the cross beam are arranged into a hollow tubular structure, the bottom of the left upright post is fixed in a pit sealed by a cover plate, the pit can be dug according to actual needs, the inner temperature of the pit is lower than that of the outer part due to the cover plate, cold air is stored in the pit, an exhaust fan is arranged in the left upright post, an air inlet of the exhaust fan extracts the cold air in the pit and sends the cold air into the left upright post, the cold air sequentially enters a rectangular annular cavity of the shell along the left upright post and the cross beam, and then enters a cavity between the LED display panel and the partition plate through a ventilation channel to cool the electronic components; in order to prevent the suction fan from being submerged after water enters the pit, the suction fan can be arranged at a higher position in the left upright post.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the elastic mechanism;
FIG. 3 is a schematic structural view of a parallel longitudinal section of the housing and the cross member;
FIG. 4 is a schematic structural view of a vertical cross section of the housing and the cross member;
reference numerals: 1. left upright post, 101, bottom portion, 102, middle portion, 103, top portion, 104, exhaust fan, 105, power mechanism i, 106, drive gear, 2, solar panel, 3, elastic mechanism, 301, steel sleeve, 302, elastic sleeve, 303, rubber sleeve, 304, steel connecting base, 305, drive key, 306, groove, 307, annular metal plate, 308, buffer deformation gap, 309, connecting cavity, 3010, cylindrical channel, 3011, positioning clamping strip, 3012, steel base, 3013, metal sleeve, 4, variable information board, 401, housing, 402, access door, 403, louver, 404, second dust guard, 405, felt layer, 406, continuous inverted U-shaped channel, 407, first dust guard, 408, divider, 409, LED display panel, 4010, rectangular annular cavity, 4011, rain-shading brim, 4012, reflecting cover, 4013, arc cavity, 5, 4011, 4012, and 4010, The device comprises a beam 501, a base plate 502, a power mechanism II, 503, a rotating bearing 504, a connecting column 6, a right upright column 7, a pit 8, a steel rope 9 and a fixed disc.
Detailed Description
The technical solution of the present invention is further explained below with reference to the specific embodiments and the accompanying drawings.
As shown in fig. 1-4, a variable information board convenient for maintenance comprises a beam 5 for fixing the variable information board 4 above a road, and a left upright 1 and a right upright 6 for supporting the beam 5, wherein the top end of the right upright 6 is detachably connected with the right end of the beam 5; the left upright post 1 comprises a hollow tubular bottom part 101, a middle part 102 and a top part 103, wherein the middle part 102 is matched and connected with internal threads of the top part 103 through external threads, a bearing is fixed at the bottom end of the middle part 102, and an outer ring of the bearing extends into the bottom part 101 and is fixedly connected with the bottom part 101; a driving gear 106 is fixedly arranged on the outer wall of the middle part 102, the driving gear 106 is driven by power output by a power mechanism I105 to drive the middle part 102 to rotate, the power mechanism I105 is provided with a speed reducer driven by a motor, and the motor and the speed reducer are fixed on the outer wall of the bottom part through a fixed steel plate; the top end of the top part 103 is provided with a rotating bearing 503, and the inner ring of the rotating bearing 503 is fixedly connected with the outer wall of the top part 103, so that the middle part 102 extends out of or retracts into the top part 103 in the rotating process, and the height of the cross beam 5 is adjusted; driving teeth are distributed on an outer ring surrounding the rotating bearing 503, so that the power output by the power mechanism II 502 drives the outer ring of the rotating bearing 503 to rotate independently through the driving teeth; the power mechanism I is a speed reducer driven by a 105-bit motor; the outer ring of the rotating bearing 503 is fixedly connected with the beam 5, so that the rotating bearing drives the beam 5 to rotate in the rotating process, the variable information board 4 is rotated to one side of the road, the power mechanism I105 and the driving gear 106 drive the middle part 102 to rotate, and the height of the beam 5 is reduced, so that the variable information board 4 can be conveniently overhauled.
The above is a basic embodiment of the present invention, and further improvements and optimizations can be made on the above, such as the following various embodiments:
one preferred embodiment of the present invention is: the left end of the cross beam 5 extends horizontally to exceed the left upright post 1, a base plate 501 is fixed to the left end of the cross beam 5 through a downward connecting plate, and the power mechanism II 502 is fixed to the base plate 501; the base plate 501 is provided with a through hole, a downward hanging steel rope 8 is arranged in the through hole, the bottom end of the steel rope 8 is provided with a fixed disc 9, when the variable information board 4 is overhauled, after the beam 5 and the top end of the right upright post 6 are separated and fixed, the weight of the variable information board 4 and the beam 5 is balanced by placing a heavy object on the fixed disc 9, and therefore the beam 5 can rotate conveniently.
Another preferred embodiment of the present invention is: the top parts of the left upright post 1 and the right upright post 6 are both connected with the cross beam 5 through an elastic mechanism 3, the elastic mechanism 3 comprises a steel connecting seat 304 which is in an inverted cone shape and provided with a through hole at the center and a steel base 3012 which is fixed at the inner ring of the rotating bearing 503 or the top end of the right upright post 6, the center of the top part of the steel base 3012 is provided with an inverted cone-shaped connecting cavity 309 which is matched with the steel connecting seat 304, the side wall of the connecting cavity 309 is distributed with a plurality of positioning clamping strips 3011, and the positioning clamping strips 3011 are matched with grooves 306 distributed on the surface of the steel connecting seat 304 to realize; a cylindrical channel 3010 is arranged at the center of the bottom of the connecting cavity 309, a key groove with an upward opening is arranged on the side wall of the cylindrical channel 3010, a connecting column 504 with a driving key 305 is arranged at the bottom of the cross beam 5, the connecting column 504 penetrates through a through hole in the center of the steel connecting seat 304 and then penetrates into the cylindrical channel 3010, and the driving key 305 on the connecting column is clamped into the key groove, so that power is transmitted to the cross beam 5 from the steel base 3012, in order to ensure the effect of the invention, the diameter of the cylindrical channel 3010 is 2-5mm larger than that of the connecting column 504, so that the connecting column 504 is ensured to have a certain movement allowance in the cylindrical channel 3010; when the steel connecting seat 304 is inserted into the connecting cavity 309, the positioning clamping strip 3011 is clamped into the groove 306, so that the positioning connection of the steel connecting seat and the groove is realized; the top of the steel connecting seat 304 is provided with a steel sleeve 301 surrounding the connecting column 504, a rubber sleeve 303 surrounding the connecting column 504 is arranged in the steel sleeve 301, and the tops of the steel sleeve 301 and the rubber sleeve 303 are provided with clamping grooves matched with the shape of the cross beam 5, so that the top of the steel sleeve 301 and the top of the rubber sleeve 303 exceed the cross beam 5 and extend to the middle position of the cross beam 5, which means that the tops of the steel sleeve 301 and the rubber sleeve 303 are provided with one clamping groove matched with the external shape and size of the bottom of the cross beam 5, so that the bottom of the cross beam 5 can be clamped in the clamping groove, and the parts of the tops of the steel sleeve 301 and the rubber sleeve 303 without the clamping grooves extend to the middle position of the cross beam 5, so that when the cross beam 5 rotates, the cross beam 5 can synchronously push the steel; a plurality of layers of annular metal plates 307 which are not in contact with each other are arranged along the length direction of the connecting column 504, the annular metal plates 307 are horizontally distributed, the outer edges of the annular metal plates are attached to the inner wall of the rubber sleeve 303, the elastic sleeve 302 is filled in a cavity between the rubber sleeve 303 and the steel sleeve 301 in a mode of surrounding the rubber sleeve 303, the bottom of the elastic sleeve 302 is flush with the bottom of the steel sleeve 301, and a buffer deformation gap 308 is formed between the top of the elastic sleeve 302 and the lowest position of the cross beam 5; the elastic sleeve 302 is made of rubber, a plurality of springs parallel to the annular metal plate 307 are distributed in the rubber, and two ends of the springs respectively extend to the inner wall surface and the outer wall surface of the elastic sleeve 302.
In the above embodiment, the method for preparing the elastic sleeve 302 comprises:
1) firstly, selecting two symmetrical strip-shaped plates and two rectangular plates, bonding one strip-shaped plate on a horizontal base plate, and then bonding and fixing the two rectangular plates and two ends of the strip-shaped plate, thereby forming a shape of a rectangle on the horizontal base plate;
2) adhering a plurality of springs with the same length on the surface of the other strip-shaped plate, after the adhesion is finished, adhering and fixing two ends of the strip-shaped plate with two rectangular plates in the shape of the rectangle, and enabling the free ends of the springs adhered on the surface of the strip-shaped plate to abut against the surface of the other strip-shaped plate in the shape of the rectangle, thereby forming a strip-shaped cavity internally distributed with a plurality of springs;
3) melting natural rubber in an internal mixer, filling the natural rubber into the strip-shaped cavity through an opening at the top of the strip-shaped cavity, and naturally cooling to form a strip-shaped rubber plate containing a spring inside;
4) the elastic sleeve 302 is formed by bonding both ends of the strip rubber plate in the longitudinal direction.
In the above embodiment, a metal sleeve 3013 is disposed around the outer edge of the top of the steel base 3012, so that when the steel connecting seat 304 is snapped into the connecting cavity 309 on the steel base 3012, the top of the metal sleeve 3013 extends to the middle of the steel sleeve 301, and there is a gap of 1-2mm between the inner wall of the metal sleeve 3013 and the outer wall of the steel sleeve 301.
Yet another embodiment of the present invention is: the variable message board 4 comprises a housing 401, the housing 401 is formed by a small rectangular frame and a large rectangular frame surrounding the small rectangular frame, and the two rectangular frames are hermetically connected through a plate-shaped piece, so that a rectangular annular cavity 4010 is formed, a separation plate 408 with ventilation holes densely distributed on the surface is detachably arranged at the middle position in the small rectangular frame, the four sides of the partition plate 408 are connected with the inner walls of the four sides of the small rectangular frame, and the setting direction of the partition plate 408 is the length direction of the variable information board 4, the partition plate 408 is matched with the slide ways on the inner walls of the four sides of the small rectangular frame through the slide blocks arranged on the four sides of the partition plate 408, thereby realizing the sliding of the partition plate 408 out of or into the small rectangular frame, the partition plate 408 divides the inner space of the small rectangular frame into two parts, one part for mounting the LED display panel 409, a cavity is arranged between the LED display panel 409 and the partition plate 408 and is communicated with the rectangular annular cavity 4010 through a ventilation channel; an openable access door 402 is provided on the other side surface opposite to the LED display panel 409, and a gap is provided between the access door 402 and the partition plate 408, and a louver 403 inclined downward is provided on the access door 402; the louver 403 is covered with an L-shaped first dust-proof board 407 and an inverted L-shaped second dust-proof board 404 in sequence, wherein the bottom of the first dust-proof board 407 is fixed on the lower part of the access door 402, the top of the first dust-proof board 407 passes over the top of the louver 403, the top of the second dust-proof board 404 is fixed on the upper part of the access door 402, the bottom of the second dust-proof board 404 extends to the lower part of the access door 402, and gaps are arranged between the second dust-proof board 404 and the first dust-proof board 407 and between the first dust-proof board 407 and the louver 403, so as to form a continuous inverted U-shaped channel 406 communicating the louver 403 with the external environment, and a felt layer 405 is arranged on the wall surface of the second dust-proof board 404 and the first dust-proof.
An improved scheme of the previous embodiment of the present invention is that an upward-convex arc-shaped reflecting cover 4012 is arranged on the top of the housing 401, an arc-shaped cavity 4013 is enclosed between the arc-shaped reflecting cover 4012 and the top of the housing 401, a heat insulating material may be filled in the arc-shaped cavity 4013, and a plurality of hollow plastic tubes parallel to the length direction of the housing 401 are filled in the heat insulating material; a rain shielding eaves 4011 inclined downwards is arranged above one side of the LED display panel 409 on the housing 401, and the bottom of the rain shielding eaves 4011 is flush with the top of the LED display panel 409.
Another improvement of the above embodiment of the present invention is that the left column 1, the right column 6 and the beam 5 are all hollow tubular structures, and the bottom of the left column 1 is fixed in a pit 7 sealed by a cover plate, an exhaust fan 104 is arranged in the left column 1, an air inlet of the exhaust fan 104 pumps out cold air in the pit 7 and sends the cold air into the left column 1, and sequentially enters a rectangular annular cavity 4010 of the housing 401 along the left column 1 and the beam 5, and then enters a cavity between the LED display panel 409 and the partition plate 408 through an air permeable channel to cool down the electronic components; the exhaust fan 104, the power mechanism I105 and the power mechanism II 502 are all powered by a solar panel 2, and the solar panel 2 is arranged on the cross beam 5; when the left upright 1 and the right upright 6 are connected with the cross beam 5 through the elastic mechanism 3, the connecting column 504 is of a hollow structure, the lower end of the connecting column penetrates through the inner ring of the rotating bearing 503 and then is inserted into the top part 103 of the left upright 1, and therefore cold air is sent into the cross beam 5 from the left upright 1; to ensure a seal, a rubber gasket may be provided at the junction of connecting column 504 and top portion 103.
In the invention, the elastic sleeve 302 can be made of rubber, but is preferably made of modified polyurethane material, according to the weight ratio, the modified polyurethane material is made of 70-74 parts of polyether polyol, 24-26 parts of toluene diisocyanate, 9-11 parts of propylene glycol, 3-4 parts of polyolefin, 5-7 parts of ethylene-vinyl acetate copolymer, 6-8 parts of modified hollow glass microsphere and 13-15 parts of modified filler, the modified filler is made of 6-8 parts of sepiolite powder, 2-3 parts of anhydrous calcium chloride, 3-4 parts of magnesium oxide and 0.8-1.2 parts of composite modifier, wherein the composite modifier is composed of heptadecafluorodecyltrimethoxysilane, N-aminoethyl-3-aminopropylmethyldimethoxysilane and phthalic anhydride, the molar ratio of the three components is 2:1: 0.8; the modified hollow glass bead is obtained by mixing commercially available hollow glass beads with a surface modifier accounting for 3-5% of the weight of the hollow glass beads, standing for 1-2h, filtering and drying in the air, wherein the surface modifier is prepared by mixing barium hydroxide, nano aluminum hydroxide, sodium carbonate and KH570 according to a weight ratio of 3-4:2-3:1-2: 50;
the preparation method of the modified polyurethane material comprises the following steps:
1) preparation of modified Filler
① respectively weighing sepiolite fine hair powder, anhydrous calcium chloride, magnesium oxide, heptadecafluorodecyltrimethoxysilane, N-aminoethyl-3-aminopropylmethyldimethoxysilane and phthalic anhydride according to the proportion for later use;
② mixing sepiolite fine hair powder, anhydrous calcium chloride and magnesium oxide uniformly in step ①, adding heptadecafluorodecyltrimethoxysilane and N-aminoethyl-3-aminopropylmethyldimethoxysilane, stirring uniformly, standing for 30-40min, adding weighed phthalic anhydride, stirring uniformly, standing for 30-60min to react completely for later use;
③ heating the mixture prepared in step ② to 150-200 ℃ under the vacuum condition of 500-1000Pa and keeping the temperature for 60-90min, and naturally cooling to obtain the modified filler;
2) preparation of modified hollow glass microspheres
Mixing commercially available hollow glass microspheres with a surface modifier accounting for 3-5% of the weight of the hollow glass microspheres, standing for 1-2h, filtering and drying in the air to obtain the hollow glass microspheres, wherein the surface modifier is prepared by mixing barium hydroxide, nano aluminum hydroxide, sodium carbonate and KH570 according to a weight ratio of 3-4:2-3:1-2: 50;
3) respectively weighing polyether polyol, toluene diisocyanate, propylene glycol, polyolefin, an ethylene-vinyl acetate copolymer, the modified hollow glass microspheres prepared in the step 2) and the modified filler prepared in the step 1) according to the proportion, then melting the polyether polyol at 90-110 ℃, adding the toluene diisocyanate and the propylene glycol into the melted polyether polyol, mixing for 10-20min, then sequentially adding the polyolefin and the ethylene-vinyl acetate copolymer into the melted polyether polyol, adding the modified filler and the modified hollow glass microspheres into the melted polyether polyol, and uniformly mixing to obtain the modified polyurethane material.
In the scheme, the polyolefin with the Melt Index (MI) of 40-100 g/10min is selected as the polyolefin, and linear low density polyethylene is preferred.
In the scheme, during the modification process of the hollow glass beads, a large number of silicon hydroxyl groups are grafted on the surfaces of the hollow glass beads, the groups connect the hollow glass beads with a substrate through chemical reaction, so that the hollow glass beads and the substrate have good interface binding force, when the material is subjected to external force, hollow glass bead particles are stressed to deform, damage and the like in the material, so that external stress is absorbed, the performance of the material is improved, silver streaks can be caused, crack expansion is stopped, shear yielding of the substrate is caused under a certain morphological structure, a large amount of impact energy is consumed, the borne external force can be well transferred, and the compression strength, the bending strength and the impact strength of the substrate are improved; sepiolite wool powder, anhydrous calcium chloride and magnesium oxide are modified to be used as fillers, and the materials have moisture absorption characteristics and can absorb trace sweat stains on the surface of the sandbag body; the added ethylene-vinyl acetate copolymer can increase the bonding strength between the functional group on the surface of the modified filler and the base material;
in addition, after the sepiolite fine hair powder, the anhydrous calcium chloride, the magnesium oxide and the composite modifier are mixed, the surface properties of the sepiolite fine hair powder, the anhydrous calcium chloride and the magnesium oxide can be further modified, so that the sepiolite fine hair powder, the anhydrous calcium chloride and the magnesium oxide are uniformly dispersed in a matrix formed by polyether polyol, toluene diisocyanate and propylene glycol, and after the sepiolite fine hair powder is uniformly dispersed in the matrix, on one hand, the sepiolite fine hair powder has a large inner surface area, is micropowder with a microporous structure, can be combined with the matrix in both inner surface and outer surface properties, and can be combined with the modified anhydrous calcium chloride and the modified magnesium oxide, so that an ageing-resistant organic-inorganic phase doped dielectric layer is formed in a polyurethane matrix;
in the scheme, the composite modifier consists of heptadecafluorodecyltrimethoxysilane, N-aminoethyl-3-aminopropylmethyldimethoxysilane and phthalic anhydride, when the composite modifier is used for modifying the filler, sepiolite wool powder, anhydrous calcium chloride and magnesium oxide are firstly mixed with the heptadecafluorodecyltrimethoxysilane and the N-aminoethyl-3-aminopropylmethyldimethoxysilane, so that the surface of the filler powder can be grafted with amino groups with higher reaction activity, the amino groups can perform amidation reaction with anhydride groups when the phthalic anhydride is added, and then dehydration and cyclization are performed under high temperature conditions to form imide groups, the groups have strong polarity and rigidity, the polarity enables rubber molecules to be subjected to microphase separation to generate a loose phase and a compact phase, and the loose phase provides enough space for the internal rotation of the rubber molecules, finally, the rubber shows high elasticity; the tight phase keeps certain attraction, so that the tearing strength of the rubber material can be obviously improved; the rigidity can obviously improve the hardness and other mechanical properties of the fluorosilicone rubber compound;
the heptadecafluorodecyltrimethoxysilane, N-aminoethyl-3-aminopropylmethyldimethoxysilane and phthalic anhydride in this case were obtained in a commercially available manner.
Claims (7)
1. The utility model provides a variable information board convenient to overhaul, is including being used for fixing crossbeam (5) above the road and being used for left stand (1) and right stand (6) that support crossbeam (5) with variable information board (4), its characterized in that: the top end of the right upright post (6) is detachably connected with the right end of the cross beam (5); the left upright post (1) is in a hollow tubular shape and is formed by sequentially connecting a bottom part (101), a middle part (102) and a top part (103), the middle part (102) is in fit connection with internal threads of the top part (103) through external threads, a bearing is fixed at the bottom end of the middle part (102), and an outer ring of the bearing extends into the bottom part (101) and is fixedly connected with the bottom part (101); a driving gear (106) is fixedly arranged on the outer wall of the middle part (102), and the driving gear (106) is driven by the power output by the power mechanism I (105) to drive the middle part (102) to rotate; the top end of the top part (103) is provided with a rotating bearing (503), and the inner ring of the rotating bearing (503) is fixedly connected with the outer wall of the top part (103), so that the middle part (102) extends out of or retracts into the top part (103) in the rotating process, and the height of the cross beam (5) is adjusted; driving teeth are distributed on an outer ring surrounding the rotating bearing (503) so that power output by the power mechanism II (502) can drive the outer ring of the rotating bearing (503) to rotate independently through the driving teeth; the outer ring of the rotating bearing (503) is fixedly connected with the cross beam (5) so that the rotating bearing drives the cross beam (5) to rotate in the rotating process, the variable information board (4) is rotated to one side of a road, the power mechanism I (105) and the driving gear (106) drive the middle part (102) to rotate, the height of the cross beam (5) is reduced, and the variable information board (4) is convenient to overhaul;
the top of the left upright post (1) and the top of the right upright post (6) are connected with the cross beam (5) through an elastic mechanism (3), the elastic mechanism (3) comprises a steel connecting seat (304) which is in an inverted cone shape and is provided with a through hole at the center and a steel base (3012) which is fixed at the top end of the inner ring of the rotating bearing (503) or the right upright post (6), the center of the top of the steel base (3012) is provided with an inverted cone shape and a connecting cavity (309) which is matched with the steel connecting seat (304), a plurality of positioning clamping strips (3011) are distributed on the side wall of the connecting cavity (309), and the positioning clamping strips (3011) are matched with grooves (306) distributed on the surface of the steel connecting seat (304) to; a cylindrical channel (3010) is arranged at the center of the bottom of the connecting cavity (309), a key groove with an upward opening is formed in the side wall of the cylindrical channel (3010), a connecting column (504) with a driving key (305) is arranged at the bottom of the cross beam (5), the connecting column (504) penetrates into the cylindrical channel (3010) after penetrating through a through hole in the center of the steel connecting seat (304), and the driving key (305) on the connecting column is clamped into the key groove, so that power is transmitted to the cross beam (5) from the steel base (3012); the top of the steel connecting seat (304) is provided with a steel sleeve (301) surrounding the connecting column (504), a rubber sleeve (303) surrounding the connecting column (504) is arranged in the steel sleeve (301), and the tops of the steel sleeve (301) and the rubber sleeve (303) are provided with clamping grooves matched with the shape of the cross beam (5), so that the top of the steel sleeve (301) exceeds the cross beam (5) and extends to the middle position of the cross beam (5); a plurality of layers of annular metal plates (307) which are not in contact with each other are arranged along the length direction of the connecting column (504), the annular metal plates (307) are horizontally distributed, the outer edges of the annular metal plates are attached to the inner wall of the rubber sleeve (303), the elastic sleeve (302) is filled around the rubber sleeve (303) in a cavity between the rubber sleeve (303) and the steel sleeve (301), the bottom of the elastic sleeve (302) is flush with the bottom of the steel sleeve (301), and a buffer deformation gap (308) is formed between the top of the elastic sleeve (302) and the lowest position of the cross beam (5); the elastic sleeve (302) is made of rubber, a plurality of springs parallel to the annular metal plate (307) are distributed in the rubber, and two ends of the springs respectively extend to the inner wall surface and the outer wall surface of the elastic sleeve (302).
2. The variable intelligence panel of claim 1, wherein: the left end of the cross beam (5) horizontally extends out of the left upright post (1), a base plate (501) is fixed to the left end of the cross beam (5) through a downward connecting plate, and the power mechanism II (502) is fixed to the base plate (501); be provided with the through-hole on base plate (501), be provided with in this through-hole to flagging steel cable (8), the bottom of steel cable (8) is provided with fixed disk (9), when overhauing variable information board (4), breaks away from fixed back at messenger's crossbeam (5) and right stand (6) top, through placing the heavy object on fixed disk (9), makes the weight of its balanced variable information board (4) and crossbeam (5) to be convenient for the rotation of crossbeam (5).
3. The easy-to-service variable message sign according to claim 1, characterized in that the elastic sleeve (302) is prepared by the following method:
1) firstly, selecting two symmetrical strip-shaped plates and two rectangular plates, bonding one strip-shaped plate on a horizontal base plate, and then bonding and fixing the two rectangular plates and two ends of the strip-shaped plate, thereby forming a shape of a rectangle on the horizontal base plate;
2) adhering a plurality of springs with the same length on the surface of the other strip-shaped plate, after the adhesion is finished, adhering and fixing two ends of the strip-shaped plate with two rectangular plates in the shape of the rectangle, and enabling the free ends of the springs adhered on the surface of the strip-shaped plate to abut against the surface of the other strip-shaped plate in the shape of the rectangle, thereby forming a strip-shaped cavity internally distributed with a plurality of springs;
3) melting natural rubber in an internal mixer, filling the natural rubber into the strip-shaped cavity through an opening at the top of the strip-shaped cavity, and naturally cooling to form a strip-shaped rubber plate containing a spring inside;
4) the elastic sleeve (302) is formed by bonding the two ends of the strip-shaped rubber plate in the length direction.
4. The variable intelligence panel of claim 1, wherein: the outer edge surrounding the top of the steel base (3012) is provided with a metal sleeve (3013), so that when the steel connecting base (304) is clamped into the connecting cavity (309) on the steel base (3012), the top of the metal sleeve (3013) extends to the middle position of the steel sleeve (301), and a gap of 1-2mm is formed between the inner wall of the metal sleeve (3013) and the outer wall of the steel sleeve (301).
5. The variable intelligence panel of claim 1, wherein: the variable information board (4) comprises a shell (401), the shell (401) is formed by sleeving a small rectangular frame and a large rectangular frame ring surrounding the small rectangular frame, the two rectangular frames are connected in a sealing mode through a plate-shaped piece to form a rectangular annular cavity (4010), a separation plate (408) with ventilation holes densely distributed on the surface is detachably arranged in the middle of the small rectangular frame, the inner space of the small rectangular frame is divided into two parts by the separation plate (408), one part is used for installing an LED display panel (409), a cavity is formed between the LED display panel (409) and the separation plate (408), and the cavity is communicated with the rectangular annular cavity (4010) through an air permeable channel; an openable access door (402) is arranged on the other side surface opposite to the LED display panel (409), a gap is also formed between the access door (402) and the partition plate (408), and a shutter (403) which inclines downwards is arranged on the access door (402); the outer part of the shutter (403) is sequentially covered with an L-shaped first dust guard (407) and an inverted L-shaped second dust guard (404), wherein the bottom of the first dust guard (407) is fixed at the lower part of the access door (402), the top of the shutter (403) is crossed by the top of the first dust guard, the top of the second dust guard (404) is fixed at the upper part of the access door (402), the bottom of the second dust guard extends to the lower part of the access door (402), gaps are reserved between the second dust guard (404) and the first dust guard (407) and between the first dust guard (407) and the shutter (403), so that a continuous inverted U-shaped channel (406) communicating the shutter (403) with the external environment is formed, and a felt layer (405) is arranged on the wall surface of the second dust guard (404) and the first dust guard (407) in the inverted U-shaped channel (406).
6. The variable intelligence panel of claim 5, wherein: an upward convex arc-shaped reflecting cover (4012) is arranged at the top of the shell (401), and an arc-shaped cavity (4013) is defined between the arc-shaped reflecting cover (4012) and the top of the shell (401); a downward-inclined rain sheltering eaves (4011) is arranged above one side of the LED display panel (409) on the shell (401), and the bottom of the rain sheltering eaves (4011) is flush with the top of the LED display panel (409).
7. The variable intelligence panel of claim 5, wherein: the left upright post (1), the right upright post (6) and the cross beam (5) are all of hollow tubular structures, the bottom of the left upright post (1) is fixed in a pit (7) which is sealed by a cover plate, an exhaust fan (104) is arranged in the left upright post (1), cold air in the pit (7) is pumped out by an air inlet of the exhaust fan (104) and sent into the left upright post (1), and then enters a rectangular annular cavity (4010) of the shell (401) along the left upright post (1) and the cross beam (5) in sequence, and then enters a cavity between the LED display panel (409) and the partition plate (408) through a ventilation channel to cool electronic components; the exhaust fan (104), the power mechanism I (105) and the power mechanism II (502) are all powered by the solar panel (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810616568.4A CN108757667B (en) | 2018-06-15 | 2018-06-15 | Variable information board convenient to overhaul |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810616568.4A CN108757667B (en) | 2018-06-15 | 2018-06-15 | Variable information board convenient to overhaul |
Publications (2)
| Publication Number | Publication Date |
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| CN108757667A CN108757667A (en) | 2018-11-06 |
| CN108757667B true CN108757667B (en) | 2020-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810616568.4A Active CN108757667B (en) | 2018-06-15 | 2018-06-15 | Variable information board convenient to overhaul |
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| CN (1) | CN108757667B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110400527A (en) * | 2019-07-02 | 2019-11-01 | 王海山 | A kind of road information plate easy to repair with cleaning function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9254051B2 (en) * | 2013-01-11 | 2016-02-09 | Atomic Design, Inc. | Display system |
| CN203953983U (en) * | 2014-06-30 | 2014-11-26 | 彭文献 | Transmission stretcher |
| CN204519546U (en) * | 2015-03-06 | 2015-08-05 | 苏州市景荣科技有限公司 | A kind of shoe tree arrangement for adjusting height |
| CN204908697U (en) * | 2015-05-28 | 2015-12-30 | 宁波凯生节能环保科技有限公司 | Back device of simple and easy student's bed |
| CN207134101U (en) * | 2017-07-13 | 2018-03-23 | 新昌县兰君广告有限公司 | A kind of advertising box with spinfunction |
| CN207123235U (en) * | 2017-09-08 | 2018-03-20 | 梁洪成 | A kind of water conservancy project ring geology crack measurement apparatus |
| CN207489363U (en) * | 2017-12-07 | 2018-06-12 | 中国葛洲坝集团公路运营有限公司 | For the device of variable information board |
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