CN107703710B

CN107703710B - Wind pressure resisting system of urban canopy and control method thereof

Info

Publication number: CN107703710B
Application number: CN201710829845.5A
Authority: CN
Inventors: 彭泽巍; 李雯; 唐华
Original assignee: Guangzhou Leafun Culture Science and Technology Co Ltd
Current assignee: Guangzhou Leafun Culture Science and Technology Co Ltd
Priority date: 2017-09-13
Filing date: 2017-09-13
Publication date: 2020-12-11
Anticipated expiration: 2037-09-13
Also published as: CN107703710A

Abstract

The invention discloses an anti-wind pressure system of an urban canopy and a control method thereof. The wind pressure resisting system of the urban canopy and the control method thereof provided by the invention have the advantages that the wind holes are formed in the curtain, so that wind can pass through the wind holes, the wind pressure borne by the curtain is reduced, the wind pressure resisting capability of the urban canopy is enhanced, in addition, the electric control device is used for receiving the pressure value signal sent by the sensor in real time and comparing the pressure value signal with the preset pressure value, when the pressure value signal is larger than the preset pressure value, the electric control device sends out a curtain packing instruction and controls the curtain packing device to pack the curtain, so that the stress of a truss is reduced, the occurrence of safety accidents is effectively prevented, and further, the major economic loss is avoided.

Description

Wind pressure resisting system of urban canopy and control method thereof

Technical Field

The invention relates to the technical field of outdoor activity backdrop, in particular to a wind pressure resisting system of an urban backdrop and a control method thereof.

Background

The urban sky screen is a screen used for projecting slides in performance, different scenes can be replaced according to the development of a plot in the performance, and under the action of the slides and light, scenes such as mountain rivers, lightning, storm, downy gardens and the like are shown, so that audiences can experience the plot that the wave waves are strong and read, and the audiences have a feeling of being personally on the scene.

At present, most city velarium all sets up in the open air (for example river side, lake side, seaside etc.), and this not only can have sufficient place to carry out the velarium and arrange, still can bring the splendid impression to spectator because it has good visual landscape effect simultaneously and experience, therefore user use experience nature is high. However, since the city canopy is installed outdoors, the design needs to consider the sudden situation caused by special weather, for example, when a strong wind suddenly occurs, if the canopy cannot be retracted in time, the truss may collapse due to the failure of bearing the wind, which may cause a major safety accident and a great amount of economic loss.

Disclosure of Invention

In view of the above problems in the prior art, an object of the present invention is to provide a wind pressure resisting system for an urban awning and a control method thereof, so as to prevent occurrence of a major safety accident and reduce economic loss.

In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:

in a first aspect, the invention discloses a wind pressure resisting system for an urban canopy, which comprises

A truss;

the curtain is provided with a plurality of windproof holes which are equidistantly arranged along the length extension direction of the curtain and the width extension direction of the curtain, the curtain comprises a fixed end and a free end which are oppositely arranged, the fixed end is fixedly connected with the truss, and the free end can be folded or unfolded relative to the fixed end;

the curtain winding and unwinding device comprises a first fixing assembly and a rope, the first fixing assembly is fixedly arranged on the truss, the rope comprises a first winding end and a second winding end, the first winding end is connected to the first fixing assembly, and the second winding end penetrates through the free end of the curtain from the fixed end and is fixedly connected with the free end so as to drive the free end of the curtain to be folded or unfolded relative to the fixed end;

one end of the sensor is fixedly arranged on the truss, and the other end of the sensor is connected with the first fixing component and used for detecting the pressure of the first fixing component acting on the truss and generating a pressure value signal;

an electrical control device electrically connected to the sensor;

the electric control device is used for receiving the pressure value signal sent by the sensor, and when the pressure value signal is larger than a preset pressure value, the rope drives the free end of the curtain to be folded relative to the fixed end.

Wherein, the truss includes first crossbeam, second crossbeam and triangle-shaped steel framework, the second crossbeam with first crossbeam is parallel and the interval sets up, triangle-shaped steel framework connect in first crossbeam reaches between the second crossbeam.

The fixed end of the curtain is fixedly arranged at one end of the truss, and the free end of the curtain is arranged opposite to the fixed end and can move up and down.

Further, be provided with the curtain shielding plate on the truss, the curtain shielding plate with the stiff end is with wide, is used for sheltering from the stiff end, in order to strengthen the outward appearance decorative effect of city day curtain.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, a plurality of shielding members are disposed on the curtain, each shielding member is disposed corresponding to each windproof hole, each shielding member includes a connecting portion and a covering portion fixedly connected to the connecting portion, the connecting portion is fixedly connected to the curtain, the covering portion is configured to cover the windproof holes, and when the curtain is subjected to a wind pressure, the covering portion can swing back and forth relative to a plane of the curtain to expose the windproof holes.

Specifically, because city sky curtain sets up in the open air mostly, like seaside, lake limit, river limit etc. consequently, the curtain will probably receive the wind pressure effect that comes from different directions, works as the curtain receives during the wind pressure is used, it is relative to cover portion the curtain plane back and forth swing to expose the hole of preventing wind, thereby make wind pass through the hole of preventing wind reduces the wind pressure that the curtain bore, and then the reinforcing the emergence of incident is avoided to the stretching resistance of curtain.

Wherein, cover portion can be relative the curtain plane back and forth movement mainly means, acts on when wind during the curtain, because cover portion is through connecting portion with the curtain rigid coupling, consequently, cover portion can receive with the equal wind pressure effect of curtain to make cover portion swing along with the wind direction. When the curtain is subjected to forward wind pressure from front to back, the covering part swings backwards relative to the curtain in the windproof hole, so that the windproof hole is exposed; and when the wind pressure is reduced or the curtain is subjected to reverse wind pressure from back to front, the covering part swings forwards relative to the curtain in the windproof hole. In addition, when the curtain is subjected to lateral wind pressure, the covering part can be rolled up along with the wind direction to expose the wind-proof hole.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the curtain is cut along a preset track to form the covering portion, and an area between the preset track and the connecting portion forms the windproof hole.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the first fixing assembly includes a driving device and a first pulley block, the driving device is electrically connected to the electrical control device, the first pulley block is fixedly connected to an output shaft of the driving device, the first winding end is connected to the first pulley block, the sensor is disposed on the first pulley block, and the sensor is configured to detect a pressure applied to the truss by the first pulley block and generate the pressure value signal;

when the electric control device receives the pressure value signal sent by the sensor and the pressure value signal is greater than the preset pressure value, the electric control device controls the driving device to rotate along the axial direction of the output shaft and drives the first pulley block to rotate along the axial direction of the output shaft, so that the rope drives the free end to be opposite to the fixed end to be folded.

Preferably, the sensor is a resistance strain type sensor, one end of the sensor is spirally connected to the truss, and the other end of the sensor is spirally connected to the first pulley block. When the first pulley block is pulled by the rope, the first pulley block is fixedly arranged on the truss, so that the first pulley block is converted into pressure on the truss under the action of the pulling force of the rope, and the sensor detects the pressure of the first pulley block on the truss and generates the pressure value signal.

Wherein the preset pressure value range is (2940-3920) N.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the curtain winding and unwinding device further includes a second fixing assembly fixedly disposed on the ground, the second winding end sequentially penetrates through the fixed end, the free end, the second fixing assembly and the first pulley block, and the second winding end is connected to the first pulley block and connected to the first winding end, when the curtain is subjected to a wind pressure, the rope connected to the curtain is deformed under the action of the wind pressure, and converts the wind pressure into a pulling force for the first pulley block, and the pulling force acts on the truss and is converted into a pressure for the truss, at this time, the sensor detects the pressure of the first pulley block acting on the truss and generates a pressure value signal;

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the first pulley block includes a first fixed pulley, a second fixed pulley, and a third fixed pulley, the first fixed pulley is fixedly connected to the output shaft of the driving device, the third fixed pulley is spaced from the second fixed pulley, and a center of the third fixed pulley and a center of the second fixed pulley are located on a same horizontal line;

the second fixing assembly comprises a fourth fixed pulley and a fifth fixed pulley, and the center of the fifth fixed pulley and the center of the fourth fixed pulley are positioned on the same horizontal line; the center distance between the fourth fixed pulley and the fifth fixed pulley is greater than that between the second fixed pulley and the third fixed pulley;

the first winding end is wound on the first fixed pulley, the second winding end is sequentially wound on the fourth fixed pulley, the second fixed pulley, the third fixed pulley, the fifth fixed pulley and the first fixed pulley, and the second winding end is connected with the first winding end on the first fixed pulley;

when the driving device drives the first fixed pulley to rotate along a second movement direction, the second winding end can move from the fourth fixed pulley to the second fixed pulley, the third fixed pulley, the fifth fixed pulley and the first fixed pulley in sequence under the driving of the first fixed pulley, so as to drive the free end of the curtain to be unfolded relative to the fixed end;

wherein the second direction of motion is opposite the first direction of motion.

Furthermore, the first pulley block further comprises a sixth fixed pulley and a seventh fixed pulley, the sixth fixed pulley and the second fixed pulley are arranged at intervals, and the center of the sixth fixed pulley and the center of the fourth fixed pulley are located on the same vertical line;

the seventh fixed pulley and the third fixed pulley are arranged at intervals, and the center of the seventh fixed pulley and the center of the fifth fixed pulley are positioned on the same vertical line;

the second is around establishing the end and around locating in proper order the sixth fixed pulley fourth fixed pulley the second fixed pulley the third fixed pulley the fifth fixed pulley the seventh fixed pulley and first fixed pulley, just the second is around establishing the end and being in on the first fixed pulley with first winding is established the end and is connected.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the curtain includes a first polyvinyl chloride layer, a fiber layer, and a second polyvinyl chloride layer stacked in sequence, where a plurality of fibers in the fiber layer are orthogonally arranged to form a warp-weft structure, the windproof holes are arranged in an equidistant manner in sequence according to weft in the warp-weft structure along a length extending direction of the curtain, the windproof holes are arranged in an equidistant manner in sequence according to warp in the warp-weft structure along a width extending direction of the curtain, and a center of each windproof hole is located at an intersection point of the weft and the warp.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, a plurality of connecting rods are disposed on the curtain at intervals along a length extending direction of the curtain, each connecting rod extends along a width direction of the curtain, two ends of each connecting rod are each provided with an annular structure, centers of each annular structure at the same end are located on the same straight line, and the rope is threaded through each annular structure.

Further, follow the length direction spaced of curtain has sewed up a plurality of hollow column holes, each the connecting rod all wears to locate each column hole to can solve the connecting rod and directly make the connecting rod easily follow the problem that drops on the curtain with curtain surface connection, adopt foretell mode can also be convenient for the equipment and the dismantlement of connecting rod and curtain simultaneously.

Wherein, annular structure can dismantle connect in the connecting rod to can reduce the annular structure and directly wear to locate the curtain and lead to the impaired condition in curtain edge, adopt the mode of dismantling the connection simultaneously can also be convenient for the equipment and the dismantlement of annular structure and connecting rod.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, a reinforcing member is disposed at a free end of the curtain, the reinforcing member extends along a width direction of the curtain, hollow steel pipes are disposed at two ends of the reinforcing member, a center of the annular structure at a same end of any one of the steel pipes is coaxial with a center of any one of the steel pipes, the rope is inserted through the annular structure and the steel pipes, and the rope is fixedly connected to the steel pipes.

The invention discloses a control method of an urban canopy, which comprises a truss, a curtain winding and unwinding device, a sensor and an electrical control device, wherein the curtain is provided with a plurality of windproof holes which are equidistantly arranged along the length extension direction of the curtain and the width extension direction of the curtain, the curtain comprises a fixed end and a free end which are oppositely arranged, the fixed end is fixedly connected with the truss, and the free end can be folded or unfolded relative to the fixed end; the curtain winding and unwinding device comprises a first fixing assembly and a rope, the first fixing assembly is fixedly arranged on the truss, the rope comprises a first winding end and a second winding end, the first winding end is connected to the first fixing assembly, the second winding end penetrates through the free end of the curtain from the fixed end of the curtain and is fixedly connected with the free end, and the free end is driven to be folded or unfolded relative to the fixed end; one end of the sensor is fixedly arranged on the truss, and the other end of the sensor is connected with the first fixing component and used for detecting the pressure of the first fixing component acting on the truss and generating a pressure value signal; the electrical control device is electrically connected with the sensor; the control method comprises the following steps:

the electric control device receives the pressure value signal sent by the sensor, and when the pressure value signal is larger than a preset pressure value, the rope drives the free end of the curtain to be folded relative to the fixed end.

As an optional implementation manner, in an embodiment of the second aspect of the present invention, a plurality of shielding members are disposed on the curtain, each shielding member is disposed corresponding to each windproof hole, each shielding member includes a connecting portion and a covering portion fixedly connected to the connecting portion, the connecting portion is fixedly connected to the curtain, the covering portion is configured to cover the windproof holes, and when the curtain is subjected to a wind pressure, the covering portion can swing back and forth relative to a plane of the curtain to expose the windproof holes.

As an alternative implementation, in an embodiment of the second aspect of the present invention, the curtain is cut along a preset track to form the covering portion, and an area between the preset track and the connecting portion forms the windproof hole.

As an optional implementation manner, in an embodiment of the second aspect of the present invention, the first fixing assembly includes a driving device and a first pulley block, the driving device is electrically connected to the electrical control device, the first pulley block is fixedly connected to an output shaft of the driving device, the first winding end is connected to the first pulley block, the sensor is disposed on the first pulley block, and the sensor is configured to detect a pressure applied to the truss by the first pulley block and generate the pressure value signal;

Wherein the preset pressure value range is (2940-3920) N.

As an optional implementation manner, in an embodiment of the second aspect of the present invention, the curtain winding and unwinding device further includes a second fixing assembly fixedly disposed on the ground, the second winding end sequentially penetrates through the fixed end, the free end, the second fixing assembly and the first pulley block, and the second winding end is connected to the first pulley block and connected to the first winding end, when the curtain is subjected to a wind pressure, the rope connected to the curtain is deformed by the wind pressure, and the wind pressure is converted into a pulling force for the first pulley block, the pulling force acts on the truss and is converted into a pressure for the truss, at this time, the sensor detects the pressure acting on the truss by the first pulley block and generates a pressure value signal;

As an optional implementation manner, in an embodiment of the second aspect of the present invention, the curtain includes a first surface layer, a fiber layer, and a second surface layer stacked in sequence, where a plurality of fibers in the fiber layer are orthogonally arranged to form a warp-weft structure, the wind-proof holes are arranged in an equidistant manner in sequence according to weft in the warp-weft structure along a length extending direction of the curtain, the wind-proof holes are arranged in an equidistant manner in sequence according to warp in the warp-weft structure along a width extending direction of the curtain, and a center of each wind-proof hole is located at an intersection point of the weft and the warp.

As an optional implementation manner, in an embodiment of the second aspect of the present invention, a plurality of connecting rods are disposed on the curtain at intervals along a length extending direction of the curtain, each connecting rod extends along a width direction of the curtain, two ends of each connecting rod are each provided with an annular structure, centers of each annular structure at the same end are located on the same straight line, and the rope is inserted through each annular structure.

As an alternative implementation manner, in an embodiment of the second aspect of the present invention, a reinforcing member is disposed at a free end of the curtain, the reinforcing member extends along a width direction of the curtain, hollow steel pipes are disposed at two ends of the reinforcing member, a center of the annular structure at a same end of any one of the steel pipes is coaxial with a center of any one of the steel pipes, the rope is inserted through the annular structure and the steel pipes, and the rope is fixedly connected to the steel pipes.

As an optional implementation manner, in an embodiment of the second aspect of the present invention, after the rope retracts the free end of the curtain relative to the fixed end, the control method further includes:

the electric control device controls the rope to drive the free end of the curtain to be unfolded relative to the fixed end.

Compared with the prior art, the wind pressure resisting system of the urban canopy and the control method thereof provided by the invention have the following beneficial effects:

through setting up a plurality of wind-proof holes on the curtain, when city canopy received the wind pressure effect, wind can follow the wind-proof hole on the curtain and pass through to reduce the wind pressure that the curtain bore, strengthen the anti-wind pressure ability of city canopy. In addition, be connected through sensor and electrical control device electricity, electrical control device can receive in real time the pressure value signal that the sensor sent and with predetermine the pressure value and carry out the comparison, when the city day curtain received strong wind pressure to act on, this pressure value signal was greater than predetermineeing the pressure value, and at this moment, electrical control device can send the curtain and pack up the instruction, and control the relative stiff end of free end of curtain packs up to reduce the effort of wind pressure to the truss, prevent the condition of collapsing that probably leads to because the truss atress is too big, effectively prevent the emergence of incident, avoid causing great economic loss.

Drawings

Fig. 1 is a schematic structural diagram of an urban canopy in a curtain expansion state according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at II;

FIG. 3 is an enlarged view of a portion of FIG. 2 at III;

FIG. 4 is a simplified diagram of the direction of movement of a cord to move a curtain as it is retracted in accordance with one embodiment of the present invention;

FIG. 5 is a schematic view of the direction of movement of a rope carrying curtain for deployment in accordance with one embodiment of the present invention;

FIG. 6 is a schematic view of another embodiment of the invention showing the direction of movement of a rope to retract a curtain;

FIG. 7 is a schematic view of another embodiment of the invention showing the direction of movement of a rope to extend a curtain;

FIG. 8 is an enlarged view of a portion of FIG. 1 at VIII;

FIG. 9 is an enlarged view of a portion of FIG. 1 at IX;

FIG. 10 is a schematic structural diagram of a curtain (not subjected to wind pressure) according to an embodiment of the present invention;

FIG. 11 is a schematic view of a stack of a curtain as disclosed in one embodiment of the present invention;

fig. 12 is a partial enlarged view at XII in fig. 11;

FIG. 13 is a schematic illustration of a tear-resistant structure according to an embodiment of the present invention;

FIG. 14 is a schematic illustration of an alternative tear resistant feature in accordance with one disclosed embodiment of the invention;

FIG. 15 is a schematic view of the covering portion and the wind-proof holes when wind pressure is applied to the curtain according to an embodiment of the present invention.

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, 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Furthermore, the terms "disposed," "placed," and "fixedly connected" as used in the present invention should be construed broadly. For example, the fixed connection may be unitary or assembled. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example one

Referring to fig. 1 to 3, 10 and 15, a wind pressure resisting system of an urban canopy 100 according to an embodiment of the present invention includes a truss 10, a curtain 20, a curtain retracting device, a sensor 30 and an electrical control device (not shown), wherein the curtain 20 is provided with a plurality of wind-proof holes 24, the wind-proof holes 24 are equidistantly disposed along a length extending direction of the curtain 20 and a width extending direction of the curtain 20, the curtain 20 includes a fixed end 20a and a free end 20b, the fixed end 20a is fixedly connected to the truss 10, and the free end 20b can be retracted or extended relative to the fixed end 20 a; the curtain winding and unwinding device comprises a first fixing component and a rope 40, the first fixing component is fixedly arranged on the truss 10, the rope 40 comprises a first winding end and a second winding end, the first winding end is connected to the first fixing component, the second winding end penetrates through the free end 20b of the curtain 20 from the fixed end 20a of the curtain 20 and is fixedly connected with the free end 20b of the curtain 20, one end of the sensor 30 is fixedly arranged on the truss 10, the other end of the sensor 30 is connected with the first fixing component, and the sensor 30 is used for detecting the pressure of the first fixing component acting on the truss 10 and generating a pressure value signal; the electrical control device is electrically connected to the sensor 30; the electrical control device is configured to receive the pressure value signal from the sensor 30, and when the pressure value signal is greater than a predetermined pressure value, the rope 40 drives the free end 20b of the curtain 20 to retract relative to the fixed end 20 a.

Specifically, because city canopy is mostly set up in the open air, like seaside, lake limit, river limit etc, consequently, this curtain 20 will probably receive the wind pressure effect from different directions, when this curtain 20 receives the wind pressure effect, wind can pass through in the windproof hole 24 on the curtain 20, thereby reduce the wind pressure that curtain 20 bore, strengthen city canopy 100's anti-wind pressure ability, and then make city canopy 100 also can be normal under the effect that has the wind pressure perform. However, when the city awning 100 is subjected to strong wind pressure, that is, the wind pressure value is greater than the wind pressure value that the curtain 20 can bear, the electrical control device sends out an instruction for retracting the curtain 20 and controls the free end 20b of the curtain 20 to retract relative to the fixed end 20a, so as to reduce the acting force of the wind pressure on the truss 10, thereby preventing the truss 10 from collapsing due to too much force and effectively preventing safety accidents.

Further, as shown in fig. 10, each windproof hole 24 is provided with a shielding member 25, each shielding member 25 includes a connecting portion 251 and a shielding portion 252 fixedly connected to the connecting portion 251, the connecting portion 251 is fixedly connected to the curtain 20, the shielding portion 252 is used for shielding the windproof hole 24, when the city awning 100 does not receive a wind pressure effect or a small wind pressure effect, the windproof hole 24 is shielded by the shielding portion 252, so that the curtain can guarantee its own flatness to the maximum, and further, when performing a performance, a better image display effect can be displayed on the curtain. In addition, when this curtain receives great wind pressure to act on, this cover portion 252 can be swung round and round relatively this connecting portion 251 in this hole 24 of preventing wind to make wind can follow and prevent wind the hole 24 and pass through, reduce the wind pressure that the curtain bore, and then the stretching resistance of reinforcing curtain reduces the emergence of incident.

In this embodiment, as an optional implementation manner, after the sensor 30 detects the pressure of the truss 10 and generates a pressure value signal, the pressure value signal is transmitted to the electrical control device, the electrical control device receives the pressure value signal and compares the pressure value signal with a preset pressure value, when the pressure value signal is smaller than the preset pressure value, it is determined that the stress of the truss 10 is within a preset pressure range, the curtain does not need to be retracted, and the performance is performed as usual; when the pressure value signal is greater than the preset pressure value, the stress of the truss 10 is determined to approach the dangerous range, the electrical control device sends a curtain retracting instruction and controls the curtain retracting device to retract the curtain 20, and the stress of the truss 10 is reduced accordingly, so that safety accidents can be effectively prevented, and economic loss is reduced.

As another optional implementation manner, the sensor 30 detects the pressure of the truss 10 and generates a pressure value signal, and simultaneously compares the pressure value signal with a preset pressure value and sends a signal, that is, when the pressure value signal is greater than the preset pressure value, it is determined that the stress of the truss 10 approaches a dangerous range, at this time, the sensor 30 outputs a signal for curtain retraction to an electrical control device, and after receiving the retracted signal, the electrical control device controls the curtain retraction device to retract the curtain 20, so as to reduce the pressure of the truss 10, thereby preventing a possible collapse situation caused by the excessive pressure of the truss 10, effectively preventing a safety accident, and avoiding causing a significant economic loss.

As an optional implementation manner, a preset time may be set in the electrical control device, and when the pressure value signal is greater than the preset pressure value and is maintained within the preset time, the electrical control device sends a curtain retracting instruction and controls the curtain to retract automatically. Preferably, the preset time can be 10s, 15s, and the like, according to the actual use condition.

In this embodiment, the rope 40 can be a steel wire rope, the first fixing component includes a driving device 50 and a first pulley block, the driving device 50 is electrically connected to the electrical control device, the first pulley block is fixedly connected to an output shaft (not shown) of the driving device 50, a first winding end of the rope 40 is connected to the first pulley block, the sensor 30 is disposed on the first pulley block, and the sensor 30 is configured to detect a pressure applied to the truss 10 by the first pulley block and generate the pressure value signal;

further, the curtain retracting device further comprises a second fixing component fixedly arranged on the ground, a second winding end of the rope 40 sequentially penetrates through the fixed end 20a, the free end 20b, the second fixing component and the first pulley block, and a second winding end of the rope 40 is connected with the first winding end on the first pulley block to form an end-to-end circular ring, when the curtain 20 is subjected to wind pressure, the rope 40 connected with the curtain 20 is deformed under the action of the wind pressure, the wind pressure is converted into tension force for the first pulley block, the tension force acts on the truss 10 and is converted into pressure for the truss 10, at the moment, the sensor 30 detects the pressure of the first pulley block acting on the truss 10 and generates a pressure value signal, and the pressure signal is generated by the pressure sensor and is transmitted to the truss 10

When the electrical control device receives the pressure value signal sent by the sensor 30 and the pressure value signal is greater than the preset pressure value, the electrical control device controls the driving device 50 to rotate along the axial direction of the output shaft and drives the first pulley block to rotate along the axial direction of the output shaft, so that the rope 40 drives the free end 20b of the curtain 20 to retract relative to the fixed end 20a of the curtain 20.

Adopt the mode that drive arrangement 50 and electrical control device electricity are connected, when this pressure value signal is greater than the pressure value of predetermineeing, this electrical control device can directly supply power to drive arrangement 50 for this drive arrangement 50 can start and drive first assembly pulley and rotate, thereby realizes driving the motion of rope 40, and then reaches the effect of automatic packing up this curtain 20.

Specifically, when the curtain 20 is acted by wind pressure, the rope 40 connected to the curtain 20 is deformed by the wind pressure, so as to convert the wind pressure into a pulling force along the vertical direction of the rope 40, at this time, the first pulley block is pressed down the truss 10 by the pulling force along the vertical direction of the rope 40, and further generates a downward pressure on the truss 10, at this time, the sensor 30 detects the force applied to the truss 10, generates a pressure value signal and transmits the pressure value signal to the electrical control device, the electrical control device compares the pressure value signal with a preset pressure value after receiving the pressure value signal sent by the sensor 30, and when the pressure value signal is greater than the preset pressure value, the electrical control device controls the driving device 50 to rotate along the first axial direction a of the output shaft, and drives the first pulley block to rotate along the first axial direction a, so that the rope 40 drives the free end 20b of the curtain 20 to retract relative to the fixed end 20a of the curtain 20, thereby achieving the automatic retraction of the curtain.

When the wind power is reduced, the force applied to the city canopy is reduced, so that the force applied to the truss 10 is also reduced, that is, when the sensor 30 detects that the force applied to the truss 10 is within a safe range (that is, the pressure applied to the truss 10 is within a preset pressure value), the performance can be continued, at this time, the electric control device controls the driving device 40 to rotate along the second axial direction B of the output shaft, and drives the first pulley block to rotate along the second axial direction B, so that the rope 40 drives the free end 20B to unfold relative to the fixed end 20a, and thus the curtain is automatically unfolded;

the first axial direction a is clockwise, and the first axial direction a is opposite to the second axial direction B.

Referring to fig. 4 to 7, in the present embodiment, the first pulley block includes a first fixed pulley 61, a second fixed pulley 62 and a third fixed pulley 63, the first fixed pulley 61 is fixedly connected to the output shaft of the driving device 40, the third fixed pulley 63 and the second fixed pulley 62 are disposed at an interval, and the center of the third fixed pulley 63 and the center of the second fixed pulley 62 are located on the same horizontal line;

the second fixing component comprises a fourth fixed pulley 64 and a fifth fixed pulley 65, and the center of the fifth fixed pulley 65 and the center of the fourth fixed pulley 64 are positioned on the same horizontal line; the center distance between the fourth fixed pulley 64 and the fifth fixed pulley 65 is greater than the center distance between the second fixed pulley 62 and the third fixed pulley 63.

The first winding end is wound on the first fixed pulley 61, the second winding end is sequentially wound on the fourth fixed pulley 64, the second fixed pulley 62, the third fixed pulley 63, the fifth fixed pulley 65 and the first fixed pulley 61, and the second winding end is connected with the first winding end on the first fixed pulley 61, so that the rope forms a closed coil.

Fig. 4 is a schematic view showing the movement direction of a rope for moving a curtain, and the movement direction of the rope 40 is shown when the first fixed pulley 61 rotates in the first axial direction a. Specifically, when the city sky-curtain encounters strong wind, the sensor 30 detects the pressure applied to the truss 10 by the first pulley set, generates a pressure value signal, and transmits the pressure value signal to the electrical control device, the electrical control device receives the pressure value signal, and the pressure value signal is greater than a preset pressure value, the electrical control device controls the output shaft of the driving device 40 to move along the first axial direction, and drives the first fixed pulley 61 to move along the first axial direction a in the drawing, and the second winding end can be driven by the first fixed pulley 61 to move from the fifth fixed pulley 65 to the third fixed pulley 63, the second fixed pulley 62, the fourth fixed pulley 64 and the first fixed pulley 61 in sequence, so as to drive the free end 20b of the curtain 20 to be retracted relative to the fixed end 20 a.

Fig. 5 is a schematic view showing the movement direction of the rope 40 when the first fixed pulley 61 rotates in the second movement direction. Specifically, when the city canopy retracted due to the strong wind again detects that the force applied to the truss 10 is within the safe range, the output shaft of the driving device will move along the second axial direction B and drive the first fixed pulley 61 to move along the direction B in the figure, and the second winding end can be driven by the first fixed pulley 61 to sequentially move from the fourth fixed pulley 64 to the second fixed pulley 62, the third fixed pulley 63, the fifth fixed pulley 65 and the first fixed pulley 61, so as to drive the free end 20B of the curtain 20 to be unfolded relative to the fixed end 20a, thereby achieving the automatic unfolding of the curtain 20.

The first axial direction a is clockwise, and the second axial direction B is opposite to the first axial direction a.

Further, the first pulley block further comprises a sixth fixed pulley 66 and a seventh fixed pulley 67, the sixth fixed pulley 66 and the second fixed pulley 62 are arranged at intervals, and the center of the sixth fixed pulley 66 and the center of the fourth fixed pulley 64 are located on the same vertical line;

the seventh fixed pulley 67 and the third fixed pulley 63 are arranged at intervals, and the center of the seventh fixed pulley 67 and the center of the fifth fixed pulley 65 are positioned on the same vertical line;

the first winding end is wound on the first fixed pulley 61, the second winding end is sequentially wound on the sixth fixed pulley 66, the fourth fixed pulley 64, the second fixed pulley 62, the third fixed pulley 63, the fifth fixed pulley 65, the seventh fixed pulley 67 and the first fixed pulley 61, and the second winding end is connected with the first winding end on the first fixed pulley 61 to form a circular ring connected end to end.

Fig. 6 is a schematic view showing another moving direction of the rope for retracting the curtain, which shows the moving direction of the rope 40 when the first fixed pulley 61 rotates in the first axial direction a. Similarly, when the city sky curtain encounters strong wind, the sensor 30 detects the force applied by the curtain 20 to the truss 10 and generates a pressure value signal to be transmitted to the electrical control device, the electrical control device receives the pressure value signal, and the pressure value signal is greater than a preset pressure value, the electrical control device controls the output shaft of the driving device 40 to move along the first axial direction a and drives the first fixed pulley 61 to move along the first axial direction a in the drawing, and then the second winding end can be driven by the first fixed pulley 61 to move from the seventh fixed pulley 67 to the fifth fixed pulley 65, the third fixed pulley 63, the second fixed pulley 62, the fourth fixed pulley 64 and the first fixed pulley 61 in sequence, so as to drive the free end 20b of the curtain 20 to be retracted relative to the fixed end 20 a.

Fig. 7 is a schematic view showing another moving direction of the rope for spreading the curtain, which shows the moving direction of the rope 40 when the first fixed pulley 61 rotates in the second axial direction B. Similarly, when the city canopy retracted by strong wind detects that the force applied to the truss 10 is within the safe range again, the output shaft of the driving device 50 will move along the second axial direction B, and drive the first fixed pulley 61 to move along the second axial direction B in the figure, and then the second winding end can move from the sixth fixed pulley 66 to the fourth fixed pulley 64, the second fixed pulley 62, the third fixed pulley 63, the fifth fixed pulley 65, the seventh fixed pulley 67 and the first fixed pulley 61 in sequence under the driving of the first fixed pulley 61, so as to drive the free end 20B of the curtain 20 to be unfolded relative to the fixed end 20a, thereby realizing the automatic unfolding of the curtain 20.

Referring to fig. 1, 8 and 9 again, in the present embodiment, a plurality of connecting rods 21 are disposed on the curtain 20 at intervals along the length extending direction of the curtain 20, each connecting rod 21 extends along the width direction of the curtain 20, two ends of each connecting rod 20 are provided with annular structures 211, and centers of the annular structures 211 at the same end are located on the same straight line, so that the rope 40 can vertically penetrate through each annular structure 211, thereby not only realizing connection between the rope 40 and the curtain 20, but also guiding the up-and-down movement of the rope 40 by using the annular structures 211.

Further, this annular structure 211 can be dismantled and connect in this connecting rod 21 to can reduce the annular structure 211 and directly wear to locate curtain 20 and lead to the impaired condition in curtain 20 edge, adopt the mode of dismantling the connection can also be convenient for the equipment and the dismantlement of annular structure 211 and connecting rod 21 simultaneously.

In this embodiment, the reinforcing member 23 is disposed on the free end 20b of the curtain 20, the reinforcing member 23 extends along the width direction of the curtain 20, hollow steel pipes 231 are disposed at both ends of the reinforcing member 23, and the center of the steel pipe 231 is coaxial with the center of the annular structure 211 at the same end of the steel pipe 231, so that the rope 40 can simultaneously penetrate through the steel pipe 231 and the annular structure 211, thereby guiding the up-and-down movement of the rope 40 by using the steel pipe 231 and the annular structure 211.

Further, the ring-shaped structure 211 includes a first ring-shaped structure 2111 and a second ring-shaped structure (not shown), the steel pipe 231 includes a first steel pipe 2311 and a second steel pipe (not shown), the center of the first steel pipe 2311 is coaxial with the center of the first ring-shaped structure 2111, the rope 40 is simultaneously inserted through the first steel pipe 2311 and the first ring-shaped structure 2111, so as to guide the up-and-down movement of the rope 40, and meanwhile, the rope 40 is fixedly connected to the first steel pipe 2311, so that the free end 20b of the curtain 20 can be retracted relative to the fixed end 20 a.

Furthermore, in order to facilitate the assembly and disassembly of the rope and the steel tube, a buckle is arranged inside the steel tube 231, a slot (not shown) corresponding to the buckle is arranged on the rope 40, and the buckle is buckled with the slot so that the rope 40 is buckled with the steel tube 231;

in addition, as another embodiment, the rope 40 may be provided with a protrusion, the diameter of the protrusion is larger than the diameter of the steel pipe 231, and the protrusion is fixedly disposed at the lower port of the steel pipe 231 to fix the rope 40 and the steel pipe 231, so that the rope 40 can drive the steel pipe 231 to move up and down.

Referring to fig. 10 to 12, in the present embodiment, the curtain 20 may be composed of a first pvc layer 20c, a fiber layer 20d and a second pvc layer 20e which are sequentially stacked, and a plurality of fibers in the fiber layer 20d are orthogonally arranged to form a warp and weft structure, so as to effectively enhance the tension of the curtain 20 and ensure a good anti-tearing effect. As shown in fig. 12, in order to avoid the situation that the warp and weft structures in the fiber layer 20d are damaged when the wind-proof holes 24 are formed in the curtain 20, and the tension of the curtain 20 is reduced, when the wind-proof holes 24 are formed, the wind-proof holes 24 may be sequentially and equidistantly arranged according to the weft lines L1 in the warp and weft structures in the length extending direction of the curtain 20, and the wind-proof holes 24 may be sequentially and equidistantly arranged according to the warp lines L2 in the width extending direction of the curtain 20, and the centers of the wind-proof holes 24 are all located at the intersection 201 of the weft lines L1 and the warp lines L2, so as to effectively avoid the damage of the warp and weft structures in the fiber layer 20d, ensure the tensile resistance of the curtain, and further enhance the wind pressure resistance of the curtain.

In this embodiment, the connecting portion 251 can be integrally formed with the curtain 20, for example, when the connecting portion 251 is integrally formed with the curtain 20, the connecting track between the connecting portion 251 and the curtain 20 can be a straight line, an arc line, a wavy line or a zigzag line. It is understood that the connection portion 251 may also be detachably connected to the curtain 20 in other embodiments. For example, the connection portion 251 may be adhered to the curtain 20 by means of glue, or the connection portion 251 may be sewn to the curtain 20 by means of sewing threads.

Further, when the connecting portion 251 is connected to the curtain 20, at least a highest point of the connecting portion 251 and the position where the curtain 20 is connected is located at a distance from the highest point to the fixed end 20a, which is smaller than a distance from the covering portion 252 to the fixed end 20a, so that when the curtain is unfolded (i.e. the curtain is hung on a truss), the covering portion 252 can cover the windproof hole 24 under the action of gravity, that is, when the curtain applied to the outdoor city canopy is not under the action of wind pressure or under the action of small wind pressure, the covering portion 252 can cover the windproof hole 24, thereby enabling the curtain to maximally ensure the flatness of the curtain itself, and further enabling the curtain to present a better image display effect during performance. In addition, when this curtain receives great wind pressure to act on, this cover portion 252 can be swung round and round relatively this connecting portion 251 in this hole 24 of preventing wind to make wind can follow and prevent wind the hole 24 and pass through, reduce the wind pressure that the curtain bore, and then the stretching resistance of reinforcing curtain reduces the emergence of incident.

Referring to fig. 10, 13 to 15, in the present embodiment, in order to facilitate the formation of the wind-proof hole 24 and the covering of the wind-proof hole 24 by the covering portion 252, the curtain 20 may be cut along a predetermined track to form the covering portion 252, and the wind-proof hole 24 is formed in an area between the predetermined track and the connecting portion 251. It should be understood that the pattern of the predetermined track must be adapted to the shape of the covering portion 252, that is, when designing the covering portion 252, a predetermined track matching the shape of the covering portion 252 can be pre-designed on the curtain 20, and then the covering portion 252 is cut and formed on the curtain 20 according to the predetermined track. Since the covering portion 252 is formed by cutting on the curtain and the covering portion 252 is used for covering the windproof hole 24, the area between the predetermined track and the connecting portion 251 is the area of the windproof hole 24, that is, the area between the predetermined track and the connecting portion 251 forms the windproof hole 24. It will be appreciated that the cover portion 252 is shaped and sized to conform to the shape and size of the windproof aperture 24.

Further, in order to ensure that the imaging effect and the wind pressure resistant effect of the curtain 20 can be effectively ensured after the wind-proof hole 24 is formed in the curtain 20, the wind-proof hole 24 may be in an inverted trapezoid shape, a U shape, an approximate bowl-shaped structure or an approximate feather ball-shaped structure, and since the shape and the size of the covering portion and the wind-proof hole are the same, the covering portion 252 is also in an inverted trapezoid shape, a U shape, an approximate bowl-shaped structure or an approximate feather ball-shaped structure.

Preferably, in order to ensure the flatness of the curtain when not subjected to wind pressure or when the wind pressure is small, so as to have a good image forming effect, the wind-proof holes 24 may preferably be inverted isosceles trapezoid-shaped holes, that is, the cross-sectional shape of the wind-proof holes 24 along a plane parallel to the curtain is inverted isosceles trapezoid. Since the shape of the wind-shielding hole 24 is identical to the shape of the cover portion 252, the cross-sectional shape of the cover portion 252 parallel to the curtain is also an inverted isosceles trapezoid.

Furthermore, the inverted isosceles trapezoid is formed by enclosing an upper base a, a first side b, a lower base c and a second side d in sequence. Since the covering portion 252 is cut on the curtain 20 according to a predetermined track, and the wind-proof hole 24 is formed in the area between the predetermined track and the connecting portion 251 after cutting, that is, the predetermined track is the track formed by the second side d, the upper bottom a and the first side b, and therefore, the connecting track between the connecting portion 251 and the curtain 20 is the lower bottom c of the inverted isosceles trapezoid. In addition, in order to enhance the tearing resistance at the joint of the lower base c and the first side b and the joint of the lower base c and the second side d, a first tearing-prevention structure is arranged between the first side b and the lower base c, and a second tearing-prevention structure is arranged between the second side d and the lower base c.

Furthermore, the first anti-tear structure and the second anti-tear structure can be both convex arc structures. As shown in fig. 13, the one end of this first anti-tear structure is connected with this first side b, the other end of this first anti-tear structure is connected with this c of going to the bottom, thereby form first arc transition structure 26 between this first side b and this c of going to the bottom, the one end of this second anti-tear structure is connected with this second side d, the other end of this second anti-tear structure is connected with this c of going to the bottom, thereby form second arc transition structure 27 between this second side d and this c of going to the bottom, and then when the curtain received great wind pressure and acts on, can strengthen the anti-tear ability of connecting portion 251 tip that is connected with curtain 20 in this shielding member 25, thereby effectively reduce the probability that the damage condition appears tearing when receiving strong wind pressure in the curtain.

Preferably, the first anti-tear structure and the second anti-tear structure may also be circular through holes, as shown in fig. 14, the first side b is connected to the first anti-tear structure, and the lower bottom c is connected to the first anti-tear structure, so that a first concave arc-shaped gap 26a may be formed between the first side b and the lower bottom c; this second side d and this second prevent tearing the structural connection, this go to the bottom c and this second prevent tearing the structural connection, thereby can form second concave arc breach 27a between this second side d and this c of going to the bottom, and then when the curtain receives great wind pressure to act on, connecting portion 251 of being connected with curtain 20 will receive equal wind pressure effect, and this circular through-hole dispersible acts on the wind pressure of this connecting portion 251 tip, thereby reduced the tearing of wind to this connecting portion 251 tip, the anti ability of tearing of this connecting portion 251 tip has been strengthened.

Further, the sum of the areas of all the windproof holes 24 on the curtain 20 is 60 to 80 percent of the plane area of the curtain 20. That is, when the wind-proof holes 24 are inverse trapezoidal holes disposed on the curtain 20, the sum of the areas of all the inverse trapezoidal holes is 60% to 80% of the planar area of the curtain 20. By adopting the design, the air passing amount of the wind-proof holes 24 on the curtain 20 can be effectively ensured, the wind pressure resistance effect of the curtain is ensured, meanwhile, the tension of the curtain 20 can be effectively ensured, and the imaging effect of the curtain can be effectively ensured when the performance imaging is carried out.

Preferably, the sum of the areas of all the windproof holes 24 in the curtain 20 is 68% of the planar area of the curtain 20. It is understood that in other embodiments, the sum of the areas of all of the louvers 24 in the curtain 20 can be 60%, 65%, 70%, 72%, 75%, 78%, or 80%, etc. of the planar area of the curtain 20.

In this embodiment, as shown in fig. 15, when the curtain is subjected to wind pressure, the covering portion 252 connected to the curtain 20 swings back and forth along with the wind direction due to the wind pressure equal to that of the curtain, and at this time, the wind-proof hole 24 covered by the covering portion 252 is exposed due to the swing of the covering portion 252, so that the wind can pass through the wind-proof hole 24, the wind pressure borne by the curtain is reduced, and the wind pressure resistance of the curtain is enhanced.

In the wind pressure resisting system of the urban canopy 100 provided by the embodiment of the invention, the curtain 20 is provided with the plurality of wind pressure resisting holes 24, so that when the urban canopy 100 is subjected to wind pressure, wind can pass through the wind pressure resisting holes 24, thereby reducing the wind pressure borne by the curtain 20, enhancing the wind pressure resistance of the urban canopy 100, and furthermore, by arranging the sensor 30 on the truss 10, the stress of the truss 10 is detected in real time and a pressure value signal is generated and transmitted to the electrical control device, the electrical control device compares the received pressure value signal with a preset pressure value, when the pressure value signal is greater than the preset pressure value, the electrical control device sends out a retracting command of the curtain 20 and controls the free end 20b of the curtain 20 to retract relative to the fixed end 20a, so that the stress on the girder 10 is reduced to effectively prevent the occurrence of a safety accident and reduce economic loss.

Example two

Referring to fig. 1 to 7, a second embodiment of the present invention provides a method for controlling the urban canopy, where the urban canopy 100 includes the truss 10, the curtain 20, the curtain retracting device, the sensor 30, and the electrical control device, the curtain 20 is provided with a plurality of wind-proof holes 24, the wind-proof holes 24 are disposed at equal intervals along a length extending direction of the curtain 20 and a width extending direction of the curtain 20, the curtain 20 includes a fixed end 20a and a free end 20b, the fixed end 20a is fixedly connected to the truss 10, and the free end 20b can be retracted or extended relative to the fixed end 20 a; the curtain winding and unwinding device comprises a first fixing component and a rope 40, wherein the first fixing component is fixedly arranged on the truss 10, the rope 40 comprises a first winding end and a second winding end, the first winding end is connected to the first fixing component, and the second winding end penetrates through the free end 20b of the curtain 20 from the fixed end 20a of the curtain 20 and is fixedly connected with the free end 20b so as to drive the free end 20b to be folded or unfolded relative to the fixed end 20 a; one end of the sensor 30 is fixedly arranged on the truss 10, and the other end of the sensor 30 is connected with the first fixing component and is used for detecting the pressure of the first fixing component acting on the truss 10 and generating a pressure value signal; the electrical control device is electrically connected to the sensor 30; the control method comprises the following steps:

the electrical control device receives the pressure value signal from the sensor 30, and controls the rope to drive the free end 20b of the curtain 20 to retract relative to the fixed end 20a when the pressure value signal is greater than a preset pressure value.

Specifically, when the city canopy 100 encounters strong wind outdoors, the curtain 20 will be acted by wind pressure, so that the rope 40 connected to the curtain 20 will be deformed by the wind pressure, and at the same time, the wind pressure will be converted into a tensile force along the vertical direction of the rope 40, at this time, the first fixing component is pressed down the truss 10 by the downward tensile force along the vertical direction of the rope 40, so as to generate a downward pressure to the truss 10, the sensor 30 detects the pressure of the truss 10 and generates a pressure value signal, and transmits the pressure value signal to the electrical control device, the electrical control device receives the pressure value signal and compares the pressure value signal with a preset pressure value, when the pressure value signal is greater than the preset pressure value, it is determined that the stress of the truss 10 approaches a dangerous range, the electrical control device sends a command for retracting the curtain, and the curtain is automatically retracted, the stress of the truss 10 is reduced, so that the occurrence of safety accidents can be effectively prevented, and the economic loss is reduced.

Further, the first fixing component includes the driving device 50 and the first pulley block, the driving device 50 is electrically connected to the electrical control device, the first pulley block is fixedly connected to an output shaft (not shown) of the driving device 50, the first winding end is connected to the first pulley block, the sensor 30 is disposed on the first pulley block, and the sensor 30 is configured to detect a pressure applied to the truss 10 by the first pulley block and generate the pressure value signal

When the curtain is acted by the wind pressure, the rope 40 penetrating through the curtain 20 is acted by the wind pressure to convert the wind pressure into the pulling force of the first pulley block, the first pulley block is pressed down by the pulling force to the truss 10, at this time, the sensor 30 will detect the pressure of the first pulley block to the truss 10, and generate a pressure value signal to be transmitted to the electrical control device, after receiving the pressure value signal from the sensor 30, the electrical control device compares the pressure value signal with a preset pressure value, and when the pressure value signal is greater than the preset pressure value, the electric control device controls the driving device 50 to rotate along the first axial direction of the output shaft and drives the first pulley block to rotate along the first axial direction, so that the rope 40 drives the free end 20b of the curtain 20 to retract relative to the fixed end 20a of the curtain 20, thereby achieving the automatic retraction of the curtain.

Further, the first pulley block comprises a first fixed pulley 61, a second fixed pulley 62 and a third fixed pulley 63, the first fixed pulley 61 is fixedly connected with the output shaft of the driving device 50, the third fixed pulley 63 and the second fixed pulley 62 are arranged at intervals, and the center of the third fixed pulley 63 and the center of the second fixed pulley 62 are located on the same horizontal line;

The first winding end of the rope 40 is wound on the first fixed pulley 61, the second winding end of the rope 40 is sequentially wound on the fourth fixed pulley 64, the second fixed pulley 62, the third fixed pulley 63, the fifth fixed pulley 65 and the first fixed pulley 61, and the second winding end of the rope 40 is connected with the first winding end of the rope 40 on the first fixed pulley 61 to form a closed rope coil.

Specifically, when the city sky-curtain meets strong wind, the curtain 20 will be acted by wind pressure, so that the rope 40 connected to the curtain 20 will be deformed by the wind pressure, and at the same time, the wind pressure will be converted into a tensile force along the vertical direction of the rope 40, at this time, the first pulley block is acted by the downward tensile force along the vertical direction of the rope 40 to press down the truss 10, so as to generate a downward pressure to the truss 10, the sensor 30 detects the pressure applied to the truss 10 by the first pulley block and generates a pressure value signal to be transmitted to the electrical control device, the electrical control device receives the pressure value signal, and the pressure value signal is greater than a preset pressure value, the electrical control device will control the output shaft of the driving device 50 to move along the first axial direction a in the figure, and drive the first fixed pulley 61 to move along the first axial direction a in the figure, so that the second winding end can be driven by the first fixed pulley 61, the third fixed pulley 63, the second fixed pulley 62, the fourth fixed pulley 64 and the first fixed pulley 61 are sequentially moved from the fifth fixed pulley 65 to drive the free end 20b of the curtain 20 to be retracted relative to the fixed end 20 a.

As another optional embodiment, the first pulley block further includes a sixth fixed pulley 66 and a seventh fixed pulley 67, the sixth fixed pulley 66 is spaced apart from the second fixed pulley 62, and the center of the sixth fixed pulley 66 and the center of the fourth fixed pulley 64 are located on the same vertical line;

the first winding end is wound on the first fixed pulley 61, the second winding end is sequentially wound on the sixth fixed pulley 66, the fourth fixed pulley 64, the second fixed pulley 62, the third fixed pulley 63, the fifth fixed pulley 65, the seventh fixed pulley 67 and the first fixed pulley 61, and the second winding end is connected with the first winding end on the first fixed pulley 61 to form a closed rope coil.

Similarly, when the city sky curtain arranged outdoors encounters strong wind, the curtain 20 will be subjected to the action of wind pressure, so that the rope 40 connected with the curtain 20 is deformed under the action of wind pressure and converts the wind pressure into tensile force along the vertical direction of the rope 40, at this time, the first pulley block is subjected to the tensile force along the vertical direction of the rope 40 to press down the truss 10, and further, downward pressure is generated on the truss 10, the sensor 30 detects the pressure applied to the truss 10 by the first pulley block and generates a pressure value signal to be transmitted to the electrical control device, the electrical control device receives the pressure value signal sent by the sensor 30, and when the pressure value signal is greater than the preset pressure value, the electrical control device controls the driving device 50 to rotate along the first axial direction a of the output shaft and drives the first fixed pulley 61 to rotate along the first axial direction a, therefore, the second winding end can be driven by the first fixed pulley 61 to move from the seventh fixed pulley 67 to the fifth fixed pulley 65, the third fixed pulley 63, the second fixed pulley 62, the fourth fixed pulley 64, the sixth fixed pulley 66 and the first fixed pulley 61 in sequence, so as to drive the free end 20b of the curtain 20 to be retracted relative to the fixed end 20 a.

In this embodiment, after controlling the rope to drive the free end 20b of the curtain 20 to retract relative to the fixed end 20a, the control method further includes:

the electrical control device controls the rope to drive the free end 20b of the curtain 20 to unfold relative to the fixed end 20 a.

Specifically, after the curtain 20 is retracted, when the wind power is reduced, the stress on the curtain 20 is reduced, and the pressure on the truss 10 is also reduced, that is, the stress on the truss 10 is within a safe range, at this time, the electrical control device controls the driving device 50 to rotate along the second axial direction B of the output shaft, and drives the first pulley block to rotate along the second axial direction B, so that the rope 40 drives the free end 20B to be unfolded relative to the fixed end 20a, thereby realizing the automatic unfolding of the curtain 20.

In the control method of the urban awning provided by the second embodiment of the invention, the electrical control device is used for receiving the pressure value signal generated by the sensor and comparing the pressure value signal with the preset pressure value, when the pressure value signal is greater than the preset pressure value, the electrical control device controls the driving device to rotate along the first axial direction of the output shaft and drives the first pulley block to rotate along the first axial direction of the output shaft, so that the automatic folding of the awning is realized. By adopting the control mode, the operation is convenient, safe and reliable.

Compared with the prior art, the wind pressure resisting system of the urban canopy and the control method thereof provided by the embodiment of the invention have the following beneficial effects:

through setting up a plurality of wind-proof holes on the curtain, when city canopy received the wind pressure effect, wind can follow the wind-proof hole on the curtain and pass through to reduce the wind pressure that the curtain bore, strengthen the anti-wind pressure ability of city canopy. In addition, the sensor is electrically connected with the electrical control device, the electrical control device can receive pressure value signals sent by the sensor at any time and compare the pressure value signals with preset pressure values, when the pressure value signals are larger than the pressure values, the electrical control device sends curtain packing instructions and controls the free end of the curtain to be packed relative to the fixed end, so that the stress of the truss is reduced, safety accidents are effectively prevented, and economic loss is reduced.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

1. A wind pressure resisting system of an urban canopy is characterized by comprising

A truss;

the curtain is provided with a plurality of windproof holes, the windproof holes are arranged along the length extending direction of the curtain and are arranged at equal intervals along the width extending direction of the curtain, a plurality of shielding pieces are arranged on the curtain and correspond to the windproof holes respectively, each shielding piece comprises a connecting part and a shielding part fixedly connected with the connecting part, the connecting part is fixedly connected with the curtain, the curtain is cut along a preset track to form the shielding part, the area between the preset track and the connecting part forms the windproof holes, the shielding part is used for shielding the windproof holes, and when the curtain is acted by wind pressure, the shielding part can swing back and forth relative to the plane of the curtain to expose the windproof holes; the curtain comprises a fixed end and a free end which are oppositely arranged, the fixed end is fixedly connected with the truss, and the free end can be folded or unfolded relative to the fixed end;

an electrical control device electrically connected to the sensor;

2. The wind pressure resisting system of the city canopy according to claim 1, wherein the first fixing assembly includes a driving device and a first pulley block, the driving device is electrically connected to the electrical control device, the first pulley block is fixedly connected to an output shaft of the driving device, the first winding end is connected to the first pulley block, the sensor is disposed on the first pulley block, and the sensor is configured to detect a pressure applied to the truss by the first pulley block and generate the pressure value signal;

3. The wind pressure resistant system of an urban canopy according to claim 2, wherein the curtain retraction device further comprises a second fixing assembly fixedly disposed on the ground, the second winding end sequentially penetrates through the fixed end, the free end, the second fixing assembly and the first pulley block, the second winding end is connected to the first pulley block and connected to the first winding end, when the curtain is subjected to wind pressure, the rope connected to the curtain is deformed under the action of the wind pressure, the wind pressure is converted into a pulling force for the first pulley block, the first pulley block applies the pulling force to the truss and converts the pulling force into a pressure for the truss, and at this time, the sensor detects the pressure of the truss and generates the pressure value signal;

4. The wind pressure resisting system for the urban canopy according to claim 3, wherein the first pulley block comprises a first fixed pulley, a second fixed pulley and a third fixed pulley, the first fixed pulley is fixedly connected with the output shaft of the driving device, the third fixed pulley is spaced from the second fixed pulley, and the center of the third fixed pulley and the center of the second fixed pulley are located on the same horizontal line;

when the driving device drives the first fixed pulley to rotate along a second axial direction, the second winding end can move from the fourth fixed pulley to the second fixed pulley, the third fixed pulley, the fifth fixed pulley and the first fixed pulley in sequence under the driving of the first fixed pulley so as to drive the free end of the curtain to be unfolded relative to the fixed end;

wherein the second axial direction is opposite to the first axial direction.

5. The wind pressure resistant system of city canopy according to claim 1, characterized in that, the curtain includes first polyvinyl chloride layer, fibrous layer and the second polyvinyl chloride layer of stacking in proper order, a plurality of fibre quadrature in the fibrous layer is arranged and is formed the longitude and latitude structure, follows in the length extending direction of curtain, the wind-proof hole is according to weft in the longitude and latitude structure is arranged the setting in proper order equidistance, follows in the width extending direction of curtain, the wind-proof hole is according to the warp of longitude and latitude structure is arranged the setting in proper order equidistance, and each the center in wind-proof hole all is located weft with the crossing point of warp.

6. The wind pressure resistant system of urban canopy according to any one of claims 1 to 5, wherein the curtain is provided with a plurality of connecting rods spaced apart from each other along a length extending direction of the curtain, each connecting rod extends along a width direction of the curtain, two ends of each connecting rod are provided with a ring structure, a center of each ring structure at a same end is located on a same straight line, and the rope is threaded through each ring structure at a same end.

7. The wind pressure resisting system of the urban canopy according to claim 6, wherein a reinforcing member is disposed at a free end of the curtain, the reinforcing member extends along a width direction of the curtain, hollow steel pipes are disposed at two ends of the reinforcing member, a center of the annular structure at a same end of any one of the steel pipes is coaxial with a center of any one of the steel pipes, the rope is sequentially inserted through the annular structure and the steel pipes, and the rope is fixedly connected to the steel pipes.

8. A control method of a city canopy is characterized in that the city canopy comprises a truss, a curtain retracting device, a sensor and an electrical control device, wherein a plurality of windproof holes are arranged on the curtain, the windproof holes are arranged along the length extending direction of the curtain and the width extending direction of the curtain at equal intervals, a plurality of shielding pieces are arranged on the curtain, each shielding piece corresponds to each windproof hole, each shielding piece comprises a connecting part and a shielding part fixedly connected with the connecting part, the connecting part is fixedly connected with the curtain, the curtain is cut along a preset track to form the shielding part, the windproof holes are formed in the area between the preset track and the connecting part, the shielding part is used for shielding the windproof holes, when the curtain is acted by wind pressure, the shielding part can swing back and forth relative to the plane of the curtain, to expose the windproof aperture; the curtain comprises a fixed end and a free end which are oppositely arranged, the fixed end is fixedly connected with the truss, and the free end can be folded or unfolded relative to the fixed end; the curtain winding and unwinding device comprises a first fixing assembly and a rope, the first fixing assembly is fixedly arranged on the truss, the rope comprises a first winding end and a second winding end, the first winding end is connected to the first fixing assembly, and the second winding end penetrates through the free end of the curtain from the fixed end of the curtain and is fixedly connected with the free end so as to drive the free end of the curtain to be folded or unfolded relative to the fixed end; one end of the sensor is fixedly arranged on the truss, and the other end of the sensor is connected with the first fixing component and used for detecting the pressure of the first fixing component acting on the truss and generating a pressure value signal; the electrical control device is electrically connected with the sensor; the control method comprises the following steps:

the electric control device receives the pressure value signal sent by the sensor, and controls the rope to drive the free end of the curtain to be folded relative to the fixed end when the pressure value signal is greater than a preset pressure value.