Portable bridge baffle

Abstract

The invention relates to the technical field of baffle equipment accessory devices, in particular to a portable bridge baffle which can be shielded, unfolded after being transported to a designated position and automatically displaced and shielded along with the project progress, so that the disassembly and assembly convenience of equipment is improved, the working efficiency of the equipment is improved, and the practicability of the equipment is improved. Comprising a mounting frame and conveying devices, the conveying devices are evenly mounted on the mounting frame, each conveying device further comprises a driving device, a supporting device, a tensioning device, a rotating assembly, a sliding assembly and a shielding device, a working cavity is formed in the mounting frame, the driving devices are evenly mounted in the working cavity, and a first through hole is formed in the bottom of the working cavity; the supporting device penetrates through the first through hole to be rotationally connected with the mounting frame, the tensioning devices are evenly mounted on the driving device, a second through hole is formed in the top of the working cavity in a penetrating mode, and the rotating assembly penetrates through the second through hole to be rotationally connected with the mounting frame.

Description

Technical Field

[0001] The invention relates to the technical field of baffle equipment attachments, and in particular to a portable bridge baffle. Background Art

[0002] Bridge construction is a comprehensive engineering process that aims to design and build structures that can cross natural or man-made obstacles to achieve safe passage of people, vehicles and other means of transportation. In the process of modern bridge construction, many aspects of preparation are required, and bridge manufacturing is considered from the perspectives of construction, safety and construction. Among them, during the bridge construction process, both sides of the bridge need to be shielded. Shields are set on both sides of the bridge. Their main function is to prevent vehicles from accidentally rushing out of the bridge deck, provide necessary safety protection for vehicles and pedestrians, reduce the severity of traffic accidents, and ensure the safety of personnel and vehicles. Shielding can prevent pedestrians, animals or objects from accidentally falling from the bridge, especially on viaducts or bridges across rivers and valleys. This is particularly important. The most common bridge construction shielding equipment currently available is baffles. Baffles are a type of equipment used to shield both sides of the bridge during construction. They have been widely used in the field of bridge construction. When the existing baffles are used, the baffles are first placed on both sides of the bridge, and after being supported by supporting equipment, the entire bridge is protected and noise is reduced. It is found in the use of the existing baffles that the existing baffles are mostly fixed during installation, and the entire bridge needs to be wrapped and protected. The materials used are large and the disassembly and assembly are inconvenient, which will have a great impact on the construction time and efficiency, resulting in poor practicality. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a portable bridge baffle which can shield the equipment by transporting it to a designated position and then unfolding it, and automatically displace and shield it as the project progresses, thereby improving the convenience of disassembly and assembly of the equipment, thereby improving the working efficiency of the equipment.

[0004] A portable bridge baffle of the present invention comprises a mounting frame and a conveying device, wherein the conveying device is evenly mounted on the mounting frame, and the conveying device also comprises a driving device, a supporting device, a tensioning device, a rotating assembly, a sliding assembly and a shielding device. A working chamber is arranged in the mounting frame, and the driving device is evenly mounted in the working chamber. A first through hole is arranged at the bottom of the working chamber, and the supporting device passes through the first through hole and is rotatably connected to the mounting frame, and the tensioning device is evenly mounted on the driving device. A second through hole is arranged at the top of the working chamber, and the rotating assembly passes through the second through hole and is rotatably connected to the mounting frame, and a slide groove is arranged on the rotating assembly, and the sliding assembly passes through the slide groove and is slidably connected to the rotating assembly, and the connecting end of the shielding device is connected to the output end of the sliding assembly.

[0005] Preferably, the driving device also includes a driving motor, a driving pulley, a driven pulley, an auxiliary plate, a rotating shaft, a bracket, a driving gear, a belt, a driven gear and a crawler track. The connecting ends of the two groups of driving motors are connected to the top of the working chamber, the connecting ends of the two groups of auxiliary plates are connected to the connecting end of the mounting frame, the output ends of the two groups of driving motors are respectively rotatably connected to the connecting ends of the corresponding auxiliary plates, the connecting ends of the two groups of driving pulleys are respectively fixedly mounted on the output ends of the corresponding driving motors, two groups of axial holes are arranged in the working chamber, the two groups of rotating shafts respectively pass through the corresponding axial holes and are rotatably connected to the mounting frame, the connecting ends of the two groups of driven pulleys are respectively connected to the connecting ends of the corresponding rotating shafts, the driving pulley and the driven pulley are both provided with belt grooves, the belts are evenly installed in the corresponding belt grooves, the connecting end of the driving gear is connected to the connecting end of the rotating shaft, the connecting ends of the six groups of brackets are rotatably connected to the connecting end of the mounting frame, the connecting ends of the six groups of driven pulleys are respectively rotatably connected to the connecting ends of the corresponding brackets, and tooth grooves are arranged on the two groups of crawlers, and multiple groups of driving gears and multiple groups of driven gears respectively pass through the corresponding belt grooves and mesh with the corresponding crawlers.

[0006] Preferably, the supporting device also includes a base plate, a first bolt, a servo motor, a turntable, a first electric push rod, a support arm, a connecting rod and a guard plate. The connecting end of the base plate is connected to the bottom end of the mounting frame, and the base plate and the mounting frame are penetrated with first screw holes. Four groups of first bolts pass through the corresponding first screw holes and are threadedly connected to the base plate and the mounting frame respectively. A rotating hole is provided on the base plate, and the turntable is rotatably connected to the base plate through the rotating hole. The connecting end of the servo motor passes through the first through hole and is connected to the top end of the base plate, and the output end of the turntable servo motor is connected to the top end of the turntable. The connecting ends of the two groups of first electric push rods are both connected to the bottom end of the turntable, and a first hinge hole is provided on the turntable. The support arm passes through the first hinge hole and is rotatably connected to the turntable. The two groups of connecting ends of the two groups of connecting rods are respectively rotatably connected to the output end of the corresponding first electric push rod and the connecting end of the support arm, and the connecting end of the guard plate is connected to the connecting ends of the two groups of connecting rods.

[0007] Preferably, the tensioning device also includes positioning buckles, screw rods, knobs, nuts and positioning blocks. The connecting ends of the two groups of positioning buckles are connected to the connecting ends of the corresponding brackets. The connecting ends of the four groups of positioning blocks are rotatably connected to the connecting ends of the corresponding brackets. The connecting ends of the four groups of screw rods are connected to the connecting ends of the corresponding knobs. The connecting ends of the four groups of knobs are rotatably connected to the connecting ends of the corresponding positioning blocks. Both groups of positioning buckles are provided with threaded holes. The four groups of screw rods pass through the corresponding threaded holes and are threadedly connected to the corresponding positioning buckles. The nuts are provided with fastening holes. The two groups of screw rods pass through the corresponding fastening holes and are threadedly connected to the corresponding nuts.

[0008] Preferably, the rotating assembly also includes an adjusting frame, a stepper motor, a second bolt, a positioning plate, a tripod, a planetary gear, a center gear, a guide rail and an adjusting disk. The connecting end of the adjusting frame is connected to the top of the mounting frame, the connecting end of the positioning plate is connected to the top of the mounting frame, the positioning plate and the mounting frame are penetrated with a second screw hole, and multiple groups of second bolts pass through the corresponding second screw holes and are threadedly connected to the mounting frame and the positioning plate respectively. The connecting end of the stepper motor passes through the second through hole and is connected to the bottom end of the positioning plate. The positioning plate is provided with a positioning hole, and the output end of the stepper motor passes through the positioning hole and is connected to the connecting end of the tripod. The connecting ends of the three groups of planetary gears are all rotatably connected to the top of the tripod. A gear sleeve is penetrated on the adjusting frame, and the output ends of the three groups of planetary gears are all meshed with the gear sleeves, the output end of the center gear is meshed with the output ends of the three groups of planetary gears, the connecting ends of the four groups of guide rails are all connected to the connecting end of the adjusting frame, and an adjusting groove is provided on the adjusting disk. The four groups of guide rails pass through the adjusting groove and are slidably connected to the adjusting disk.

[0009] Preferably, the sliding assembly also includes a second electric push rod, a sliding box, a mounting plate, a rotating motor and a third bolt, the connecting ends of the two groups of second electric push rods are connected to the connecting end of the adjusting disk, the sliding box passes through the sliding groove and is slidably connected to the adjusting disk, the output ends of the two groups of second electric push rods are connected to the connecting end of the sliding box, a limiting block is matched on the adjusting disk, the two groups of limiting blocks are evenly slidably connected to the sliding box, the connecting end of the mounting plate is connected to the connecting end of the sliding box, the mounting plate and the sliding box are penetrated by a third screw hole, multiple groups of third bolts pass through the corresponding third screw holes and are threadedly connected to the mounting plate and the sliding box, the connecting end of the rotating motor is connected to the connecting end of the mounting plate, a third through hole is provided on the mounting plate, and the output end of the rotating motor passes through the third through hole and is rotatably connected to the mounting plate.

[0010] Preferably, the shielding device also includes a bracket, a flap, a third electric push rod, a slider, a center block, a cross rod, an external baffle, an internal baffle and a rubber strip. The connecting end of the bracket is connected to the connecting end of the mounting frame, the connecting end of the flap is connected to the output end of the rotating motor, a long slot is provided on the flap, the slider passes through the long slot and is slidably connected to the flap, the connecting ends of the two groups of third electric push rods are both connected to the connecting end of the flap, the output ends of the two groups of third electric push rods are both connected to the connecting end of the slider, the connecting end of the center block is connected to the connecting end of the flap, the corresponding cross rod is rotatably connected to the center block, the multiple groups of cross rods are hinged to each other, the output end of the slider is rotatably connected to the connecting end of the corresponding cross rod, the multiple groups of external baffles and the internal baffles are respectively connected to the connecting ends of the corresponding cross rods, and the connecting ends of the multiple groups of rubber strips are respectively connected to the connecting ends of the corresponding external baffles and the internal baffles.

[0011] Preferably, it also includes a support rod, a pin and a buckle, the connecting end of the support rod is connected to the connecting end of the corresponding cross rod, a second hinge hole is provided on the support rod, the pin passes through the second hinge hole and is rotatably connected to the support rod, multiple groups of corresponding cross rods are provided with pin holes, the pin and the support rod pass through the pin holes and are slidably connected to the corresponding cross rods, and the connecting end of the buckle is connected to the connecting end of the flap.

[0012] Compared with the prior art, the invention has the following beneficial effects: in the process of shielding the bridge, the driving device drives the equipment to move, so that the equipment shields according to the progress of the project, thereby improving the pertinence of the equipment to the bridge construction; (2) The shielding device is extended by the rotating component in cooperation with the sliding component to provide adaptive shielding for shielding requirements at different positions and angles, thereby improving the automation level of the equipment; (3) The driving device is tensioned by the tensioning device. When the crawler track needs to be replaced, the crawler track is replaced or clamped by driving the tensioning device, thereby improving the convenience of equipment use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the structure of the explosion of the present invention; Figure 3 is a schematic diagram of the connection structure between the mounting frame and the driving gear of the present invention; Figure 4 It is a schematic diagram of the connection structure between the servo motor and the turntable of the present invention; Figure 5 It is a schematic diagram of the connection structure between the adjustment frame and the planetary gear of the present invention; Figure 6 It is a schematic diagram of the connection structure between the sliding box and the adjusting disk of the present invention; Figure 7 It is a schematic diagram of the connection structure of the external baffle and the internal baffle of the present invention; Figure 8 It is a schematic diagram of the connection structure of the internal baffle and the rubber strip of the present invention; Markings in the accompanying drawings: 1, mounting frame; 201, working chamber; 202, first through hole; 203, second through hole; 204, slide groove; 301, driving motor; 302, driving pulley; 303, driven pulley; 304, auxiliary plate; 305, rotating shaft; 306, bracket; 307, driving gear; 308, driven gear; 309, crawler; 310, shaft hole; 311, belt groove; 312, tooth groove; 313, leather belt; 401, bottom plate; 402, first bolt; 403, servo motor; 404, turntable; 405, first electric push rod; 406, support arm; 407, connecting rod; 408, guard plate; 409, first screw hole; 410, turn hole; 411, first reaming hole; 501, positioning buckle; 502, screw rod; 503, turn button; 504, nut; 505, positioning block; 506, threaded hole; 507, fastening hole; 60 1. Adjustment frame; 602. Stepper motor; 603. Second bolt; 604. Positioning plate; 605. Tripod; 606. Planetary gear; 607. Center gear; 608. Guide rail; 609. Adjustment plate; 610. Second screw hole; 611. Positioning hole; 612. Gear sleeve; 613. Adjustment slot; 701. Second electric push rod; 702. Sliding box; 703. Mounting plate; 704. Rotating motor; 705. Third screw Bolt; 706, limit block; 707, third screw hole; 708, third through hole; 801, bracket; 802, flap; 803, third electric push rod; 804, slider; 805, center block; 806, cross rod; 807, outer baffle; 808, inner baffle; 809, rubber strip; 810, long groove; 901, support rod; 902, pin; 903, buckle; 904, second reaming hole; 905, pin hole. DETAILED DESCRIPTION

[0014] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0015] Embodiment: A portable bridge baffle conveying device of the present invention further comprises: S1: Rotate the tensioning device to install the crawler. During this process, start the driving device to rotate, drive and move the equipment through belt transmission. After moving to the appropriate position, start the supporting device to rotate to support and stabilize the bottom of the equipment. The equipment can be stabilized in a triangular supporting structure to avoid the shielding device from unfolding and causing the heavier equipment on one side to lose balance and cause damage to the equipment. S2: During this process, the rotating component is started to rotate. The rotating component adopts a planetary gear set, so that it can drive a larger torque and a larger weight device, making its rotation more stable. During this process, the sliding component is started to flip, so that it slides and extends to an appropriate position; S3: Start the shielding device to unfold. The shielding device adopts a cross-link design, which is fixed at one end. By stretching the movable end at one end, the angle of the cross-link is adjusted to gradually unfold, driving the staggered baffles to unfold and shield.

[0016] The conveying device is used to provide adaptive support for bridge construction, thereby improving the automation level of the equipment. Automatic support and shielding are used to improve the convenience of equipment use, thereby improving the work efficiency of the equipment.

[0017] As a preferred embodiment of the above, a driving device of a portable bridge baffle of the present invention further includes: S1: By installing the drive motor in the working chamber and making a hidden design, it can cooperate with the auxiliary plate support when rotating, and can bear greater pressure when rotating. With the auxiliary plate support, the rotation stability of the equipment can be improved; S2: During this process, the driving motor rotates to drive the driving pulley connected to it to rotate, and the driving pulley and the driven pulley are connected by a belt, thereby driving the rotating shaft on the driven pulley to rotate accordingly; S3: The driving gear is connected to the rotating shaft, and the track is driven to rotate through the connection between the driving gear and the track. Six sets of driven gears are evenly arranged around the mounting frame, and the track supports on both sides present a triangular stable structure, thereby driving the equipment to move.

[0018] Driving through a driving device greatly improves the automation level of the equipment. The coordinated use of belt drive and gear drive improves the driving stability of the equipment, thereby improving the working efficiency of the equipment.

[0019] As a preferred embodiment of the above, a portable bridge baffle tensioning device of the present invention further includes: S1: Two sets of positioning buckles are used to fix the positions of multiple sets of screw rods. The screw rods connected to them are driven to rotate by turning the knobs. The spacing of the screw rods is adjusted during the rotation process. S2: After the spacing is adjusted, the screw rod is connected to the corresponding bracket through the corresponding positioning block, and the spacing between the center bracket and the brackets on both sides is adjusted by rotating the screw rod, and the crawler track is tightened or loosened by rotating the brackets on both sides; S3: After tensioning to a certain degree, turn the nut to lock the screw rod to prevent the screw rod from moving due to vibration during the driving process of the equipment, which will affect the tightness of the track.

[0020] The equipment is tensioned by a tensioning device, which improves the stability of the equipment. The convenience of tensioning the equipment is improved by means of a screw rod, thereby improving the working efficiency of the equipment.

[0021] As a preferred embodiment of the above, a portable bridge baffle support device of the present invention further includes: S1: The base plate is installed and fixed by the first bolt to realize the modularization of the whole supporting device, so that the whole device can be disassembled and assembled by disassembling and assembling the first bolt, thereby improving the convenience of the device; S2: The servo motor is started to drive the turntable to rotate on the bottom plate to adjust the support angle of the equipment. After rotating to an appropriate angle, the first electric push rod is started to drive the connecting rod to slide. The support arm is lowered or raised by pulling or supporting the connecting rod. S3: During this process, the bottom of the equipment is shielded and protected by a guard plate.

[0022] The equipment is stabilized by the support device, which greatly improves the stability of the equipment support. The electric push rod and servo motor cooperate to drive the equipment, which improves the automation level of the equipment and thus improves the working efficiency of the equipment.

[0023] As a preferred embodiment of the above, a rotating assembly of a portable bridge baffle of the present invention further includes: S1: The planetary gear set is separated by installing an adjustment frame and a positioning plate to make it easier to disassemble and assemble. The positioning plate is fixed by evenly distributed second bolts. During this process, the stepper motor is started to drive the tripod connected thereto to rotate. The planetary gear on the tripod is meshed with the gear sleeve to roll along the gear sleeve. S2: In this process, the three sets of planetary gears rotate, and the central gear is driven to rotate through the meshing relationship, and the adjustment plate is driven to rotate on the guide rail through the rotation; S3: The shielding angle of the bridge is adjusted by changing the angle of the adjustment plate and the adjustment frame.

[0024] The adjustment is performed through the rotating assembly, thereby improving the adjustment performance of the equipment, and the automation level of the equipment is improved through the motor drive, thereby improving the working efficiency of the equipment.

[0025] As a preferred embodiment of the above, a sliding assembly of a portable bridge baffle of the present invention further includes: S1: Start the second electric push rod to drive the sliding box connected to it to slide on the adjustment plate to extend and retract, adjust the position by extension and retraction, and drive the shielding device to extend or retract, so as to facilitate the deployment or storage of the equipment; S2: During this process, the rotating motor is fixed by a mounting plate so that it can be easily separated from the sliding box, and the mounting plate is fixed by a third bolt; S3: During this process, the rotating motor is started to drive the shielding device to rotate. During the sliding process of the sliding box, the sliding trajectory of the sliding box is limited and stabilized by the limit block.

[0026] The sliding assembly drives the device to slide, which greatly improves the convenience of using the device. The device can be stored or unfolded in a telescopic manner, which improves the automation level of the device and thus improves the working efficiency of the device.

[0027] As a preferred embodiment of the above, a portable bridge shielding device of the present invention further includes: S1: multiple groups of cross bars are connected to the central block through corresponding cross bars, and the basic positions of the multiple groups of cross bars are fixed so that the cross bars can be unfolded or folded around the central block; S2: During this process, the third electric push rod is started to drive the slider connected to it to slide, and the cross rod connected to the slider is driven to slide and unfold. Since the multiple groups of cross rods are hinged, the multiple groups of cross rods start the same operation. Through the unfolding of the cross rods, the outer baffle and the inner baffle are driven to unfold gradually from the folded state, and the gap between the inner baffle and the outer baffle is covered with the rubber strip; S3: During the folding process of the outer baffle and the inner baffle, the flap is rotated to place the outer baffle and the inner baffle horizontally, and the baffle is placed on the bracket in coordination with the rotation of the adjustment disk.

[0028] By shielding the equipment with a shielding device, the automation level of the equipment is greatly improved. By filling the gaps with rubber strips, the stability of the equipment is improved, thereby improving the working efficiency of the equipment.

[0029] As a preferred embodiment of the above, a portable bridge baffle of the present invention further includes: S1: During the gradual unfolding of the cross bars, the sliding trajectories of the multiple groups of cross bars are stabilized and limited by sliding the outermost support bars; S2: After the cross rods are stored, turn the pins to make them L-shaped, and snap the pins into the buckles to fix and stabilize the baffle.

[0030] The cross rods are stabilized by sliding the support rods, thereby improving the stability of the equipment. The functionality of the equipment is improved by rotating the support rods to clamp the equipment, thereby improving the working efficiency of the equipment.

[0031] The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

[0032] The “first”, “second” and “third” in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A portable bridge baffle, comprising a mounting frame (1) and a conveying device, wherein the conveying device is evenly mounted on the mounting frame (1); characterized in that: The conveying device also includes a driving device, a supporting device, a tensioning device, a rotating assembly, a sliding assembly and a shielding device. A working chamber (201) is provided in the mounting frame (1). The driving device is evenly installed in the working chamber (201). A first through hole (202) is provided at the bottom of the working chamber (201). The supporting device passes through the first through hole (202) and is rotatably connected to the mounting frame (1). The tensioning device is evenly installed on the driving device. A second through hole (203) is provided at the top of the working chamber (201). The rotating assembly passes through the second through hole (203) and is rotatably connected to the mounting frame (1). A sliding groove (204) is provided on the rotating assembly. The sliding assembly passes through the sliding groove (204) and is slidably connected to the rotating assembly. The connecting end of the shielding device is connected to the output end of the sliding assembly.

2. A portable bridge barrier as claimed in claim 1, characterized in that: The driving device further comprises a driving motor (301), a driving pulley (302), a driven pulley (303), an auxiliary plate (304), a rotating shaft (305), a bracket (306), a driving gear (307), a belt (313), a driven gear (308) and a crawler track (309); the connecting ends of the two sets of driving motors (301) are both connected to the top of the working chamber (201); the connecting ends of the two sets of auxiliary plates (304) are both connected to the connecting end of the mounting frame (1); the output ends of the two sets of driving motors (301) are respectively rotatably connected to the connecting ends of the corresponding auxiliary plates (304); the connecting ends of the two sets of driving pulleys (302) are respectively fixedly mounted on the output ends of the corresponding driving motors (301); two sets of shaft holes (310) are provided in the working chamber (201); the two sets of rotating shafts (305) respectively pass through the corresponding shaft holes ( The six brackets (306) are rotatably connected to the mounting frame (1), the connection ends of the two sets of driven pulleys (303) are respectively connected to the connection ends of the corresponding rotating shafts (305), the driving pulley (302) and the driven pulley (303) are both provided with belt grooves (311), the belts (313) are evenly installed in the corresponding belt grooves (311), the connection ends of the driving gears (307) are connected to the connection ends of the rotating shafts (305), the connection ends of the six sets of brackets (306) are all rotatably connected to the connection ends of the mounting frame (1), the connection ends of the six sets of driven pulleys (303) are respectively rotatably connected to the connection ends of the corresponding brackets (306), the two sets of crawler tracks (309) are both provided with tooth grooves (312), and the multiple sets of driving gears (307) and the multiple sets of driven gears (308) respectively pass through the corresponding belt grooves (311) and mesh with the corresponding crawler tracks (309).

3. A portable bridge barrier as claimed in claim 2, characterized in that: The supporting device further comprises a base plate (401), first bolts (402), a servo motor (403), a turntable (404), a first electric push rod (405), a support arm (406), a connecting rod (407) and a guard plate (408); a connecting end of the base plate (401) is connected to a bottom end of the mounting frame (1); first screw holes (409) are provided through the base plate (401) and the mounting frame (1); four groups of first bolts (402) respectively pass through corresponding first screw holes (409) and are threadedly connected to the base plate (401) and the mounting frame (1); a turntable (410) is provided on the base plate (401); the turntable (404) passes through the turntable hole (410) and is rotatably connected to the base plate (401); and the servo motor (406) is connected to the base plate (401) and the servo motor (407). 03) passes through the first through hole (202) and is connected to the top of the bottom plate (401); the output end of the servo motor (403) of the turntable (404) is connected to the top of the turntable (404); the connection ends of the two groups of first electric push rods (405) are both connected to the bottom end of the turntable (404); a first hinge hole (411) is provided on the turntable (404); the support arm (406) passes through the first hinge hole (411) and is rotatably connected to the turntable (404); the two groups of connection ends of the two groups of connecting rods (407) are respectively rotatably connected to the output ends of the corresponding first electric push rods (405) and the connection ends of the support arms (406); and the connection end of the guard plate (408) is connected to the connection ends of the two groups of connecting rods (407).

4. A portable bridge barrier as claimed in claim 3, characterized in that: The tensioning device further comprises a positioning buckle (501), a screw rod (502), a knob (503), a nut (504) and a positioning block (505); the connection ends of the two groups of positioning buckles (501) are connected to the connection ends of the corresponding brackets (306); the connection ends of the four groups of positioning blocks (505) are respectively rotatably connected to the connection ends of the corresponding brackets (306); the connection ends of the four groups of screw rods (502) are respectively connected to the connection ends of the corresponding knobs (503); the connection ends of the four groups of knobs (503) are respectively rotatably connected to the connection ends of the corresponding positioning blocks (505); the two groups of positioning buckles (501) are both provided with threaded holes (506); the four groups of screw rods (502) respectively pass through the corresponding threaded holes (506) and are threadedly connected to the corresponding positioning buckles (501); the nuts (504) are provided with fastening holes (507); the two groups of screw rods (502) respectively pass through the corresponding fastening holes (507) and are threadedly connected to the corresponding nuts (504).

5. A portable bridge barrier as claimed in claim 4, characterized in that: The rotating assembly further comprises an adjusting frame (601), a stepping motor (602), a second bolt (603), a positioning plate (604), a tripod (605), a planetary gear (606), a central gear (607), a guide rail (608) and an adjusting disk (609); the connecting end of the adjusting frame (601) is connected to the top of the mounting frame (1); the connecting end of the positioning plate (604) is connected to the top of the mounting frame (1); the positioning plate (604) and the mounting frame (1) are provided with second screw holes (610); a plurality of groups of second bolts (603) respectively pass through corresponding second screw holes (610) and are threadedly connected to the mounting frame (1) and the positioning plate (604); the connecting end of the stepping motor (602) passes through the second through hole (203) and is connected to the bottom of the positioning plate (604); The positioning plate (604) is provided with a positioning hole (611), the output end of the stepping motor (602) passes through the positioning hole (611) and is connected to the connecting end of the tripod (605), the connecting ends of the three sets of planetary gears (606) are all rotatably connected to the top of the tripod (605), a gear sleeve (612) is provided through the adjusting frame (601), the output ends of the three sets of planetary gears (606) are all meshed with the gear sleeve (612), the output end of the central gear (607) is meshed with the output ends of the three sets of planetary gears (606), the connecting ends of the four sets of guide rails (608) are all connected to the connecting end of the adjusting frame (601), and the adjusting disk (609) is provided with an adjusting slot (613), and the four sets of guide rails (608) pass through the adjusting slot (613) and are all slidably connected to the adjusting disk (609).

6. A portable bridge barrier as claimed in claim 5, characterized in that: The sliding assembly further comprises a second electric push rod (701), a sliding box (702), a mounting plate (703), a rotating motor (704) and a third bolt (705); the connecting ends of the two sets of second electric push rods (701) are both connected to the connecting ends of the adjusting disk (609); the sliding box (702) passes through the slide groove (204) and is slidably connected to the adjusting disk (609); the output ends of the two sets of second electric push rods (701) are both connected to the connecting ends of the sliding box (702); a limiting block (706) is provided on the adjusting disk (609); the two sets of limiting blocks (706) are evenly connected to the sliding box (702) for sliding connection. The connecting end of the mounting plate (703) is connected to the connecting end of the sliding box (702), the mounting plate (703) and the sliding box (702) are provided with third screw holes (707) through them, a plurality of sets of third bolts (705) respectively pass through the corresponding third screw holes (707) and are threadedly connected to the mounting plate (703) and the sliding box (702), the connecting end of the rotating motor (704) is connected to the connecting end of the mounting plate (703), the mounting plate (703) is provided with a third through hole (708), and the output end of the rotating motor (704) passes through the third through hole (708) and is rotationally connected to the mounting plate (703).

7. A portable bridge barrier as claimed in claim 6, characterized in that: The shielding device further comprises a bracket (801), a flap (802), a third electric push rod (803), a slider (804), a center block (805), a cross rod (806), an outer baffle (807), an inner baffle (808) and a rubber strip (809); the connection end of the bracket (801) is connected to the connection end of the mounting frame (1); the connection end of the flap (802) is connected to the output end of the rotating motor (704); a long slot (810) is provided on the flap (802); the slider (804) passes through the long slot (810) and is slidably connected to the flap (802); the connection ends of the two sets of third electric push rods (803) are both connected to the connection end of the flap (802); The output ends of the two groups of third electric push rods (803) are connected to the connecting end of the slider (804), the connecting end of the central block (805) is connected to the connecting end of the flap (802), the corresponding cross rod (806) is rotatably connected to the central block (805), the multiple groups of cross rods (806) are hinged to each other, the output end of the slider (804) is rotatably connected to the connecting end of the corresponding cross rod (806), the multiple groups of external baffles (807) and internal baffles (808) are respectively connected to the connecting ends of the corresponding cross rods (806), and the connecting ends of the multiple groups of rubber strips (809) are respectively connected to the connecting ends of the corresponding external baffles (807) and internal baffles (808).

8. A portable bridge barrier as claimed in claim 7, characterized in that: It also includes a support rod (901), a pin (902) and a buckle (903); the connection end of the support rod (901) is connected to the connection end of the corresponding cross rod (806); the support rod (901) is provided with a second hinge hole (904); the pin (902) passes through the second hinge hole (904) and is rotatably connected to the support rod (901); multiple groups of corresponding cross rods (806) are provided with pin holes (905); the pin (902) and the support rod (901) pass through the pin holes (905) and are slidably connected to the corresponding cross rods (806); and the connection end of the buckle (903) is connected to the connection end of the flap (802).

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