Height limiting device for bridge building

Abstract

The invention relates to the technical field of bridge height limiting, and particularly discloses a bridge building height limiting device. The main cross beam is fixedly mounted at the top ends of the stand columns; the auxiliary cross beams are horizontally fixed on two sides of the main cross beam; the two ends of the transverse moving sliding rod are installed on the corresponding auxiliary cross beams in a sliding mode respectively. The buffering piece is mounted on the transverse moving sliding rod; the lifting tables are mounted on the corresponding stand columns in a lifting manner; the intercepting piece is mounted between the lifting tables on the two sides; the buffer piece can specifically block the vehicle exceeding the height limit and force the vehicle exceeding the height limit to decelerate actively, meanwhile, the intercepting piece only intercepts wheels of the vehicle exceeding the height limit, and through mutual cooperation of the buffer piece and the intercepting piece, the main purpose is to effectively prevent the vehicle exceeding the height limit from passing; meanwhile, damage to the vehicle or the height limiting device caused by rigid violent collision between the vehicle exceeding the height limiting device and the height limiting device is effectively avoided, and the maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of bridge height limitation, and more specifically, to a bridge building height limitation device. Background Art

[0002] With the development of the logistics industry, more and more oversized trucks are appearing on roads and bridges, which poses a great safety hazard to some bridges that do not have oversized load capacity. In order to ensure smooth traffic and reduce the damage to bridge structures caused by overloaded and oversized trucks, height limit devices are usually installed at the entrance of the bridge to limit the loading height of passing vehicles.

[0003] The existing height limit device has a relatively simple structure. It is to fix columns on both sides of the bridge entrance and then install a rigid height limit bar on the top of the column to limit and block the passage of super-high vehicles. In actual use, it is inevitable that the driver does not pay attention to the height limit prompt information or the driver makes an inaccurate judgment on the height of the vehicle, which causes the super-high vehicle to accidentally collide with the height limit bar. Since such vehicles have a large body weight and inertia, it is difficult to reduce the speed in a short time. Once the top of the vehicle collides with the height limit bar, it will cause significant damage to the roof and the height limit bar, greatly increasing the maintenance cost after the collision. Summary of the invention

[0004] In order to overcome the above technical problems, the present invention proposes a bridge building height limiting device.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A bridge construction height limiting device is applied to a bridge roadbed, wherein a foundation pit is provided on the bridge roadbed; the bridge construction height limiting device comprises: Two groups of columns are provided and are symmetrically and vertically buried on both sides of the foundation pit, and a lifting chute is provided at the bottom of the columns; The main beam is fixedly mounted on the top of the column; Auxiliary crossbeams, which are provided in two groups and are symmetrically fixed horizontally on both sides of the main crossbeam; A transverse sliding rod, both ends of which are slidably mounted on corresponding secondary crossbeams; A buffer, which is installed on the transverse sliding rod and is used to buffer vehicles that exceed the height limit; the initial height of the buffer is lower than the preset height limit; The lifting platform is provided with two groups and is respectively installed in the lifting chute on the corresponding column so as to be liftable; The interception piece is installed between the lifting platforms on both sides and is used to intercept the wheels of vehicles that exceed the height limit; The transmission member is used to drive the interception member to rise out of the foundation pit and limit the forward travel of the wheel when the vehicle exceeding the height limit pushes the buffer member forward, so as to intercept the wheel of the vehicle exceeding the height limit.

[0006] As a further solution of the present invention: a side plate is provided on the secondary crossbeam, and a horizontal guide groove and an inclined guide groove connected to each other are opened on the side plate, the inclined guide groove is located on a side close to the main crossbeam, and the end of the inclined guide groove away from the horizontal guide groove is inclined upward; The two ends of the transverse sliding rod are vertically fixed with connecting rods, and a vertical guide groove is opened in the connecting rod. The two ends of the buffer member movably pass through the vertical guide groove and are adaptively connected with the corresponding horizontal guide groove and the inclined guide groove.

[0007] As a further solution of the present invention: the transmission member includes: A second guide wheel is rotatably mounted on the secondary crossbeam; A third guide wheel is rotatably mounted on the main beam; The second cable has one end fixedly connected to the transverse sliding rod, and the other end passes around the second guide wheel and the third guide wheel in sequence and is fixedly connected to the lifting platform.

[0008] As a further solution of the present invention: the buffer member includes a sleeve rod and a rigid sleeve sleeved on the outside of the sleeve rod, an elastic buffer belt is arranged on the side of the rigid sleeve away from the main cross beam, a support frame is hinged between the elastic buffer belt and the rigid sleeve, and a buffer support member is also arranged on the side of the rigid sleeve facing the elastic buffer belt.

[0009] As a further solution of the present invention: the buffer support member includes a shell fixed on the rigid sleeve and a T-shaped airbag embedded in the shell, the T-shaped airbag includes a main support part facing the elastic buffer belt and auxiliary support parts symmetrically distributed on both sides of the main support part, and a third spring is arranged in the main support part.

[0010] As a further solution of the present invention: a first chamber is opened in the lifting platform, and multiple groups of winding drums are rotatably installed in the first chamber, and a first cable connected to the intercepting member is wound on the winding drum. The inner wall of the first chamber is also provided with a fixed disk corresponding to each winding drum, and a winding spring sheet is installed in the fixed disk, and the two ends of the winding spring sheet are respectively fixedly connected to the inner wall of the fixed disk and the rotating shaft of the winding drum; a first guide wheel for guiding the first cable is also rotatably installed in the first chamber.

[0011] As a further solution of the present invention: the intercepting member includes an intercepting plate connected to the first cable, an anti-tilt bottom plate is provided on the side of the intercepting plate away from the buffer member, a reinforcing rod is connected between the anti-tilt bottom plate and the intercepting plate, and a plurality of balls are installed on the bottom surface of the anti-tilt bottom plate.

[0012] As a further solution of the present invention: a wheel cover is arranged on one side of the intercepting plate close to the buffer, a recessed portion adapted to the wheel is arranged in the wheel cover, and a plurality of groups of rollers are arranged in an array in the recessed portion.

[0013] As a further solution of the present invention: a locking member is provided on the secondary crossbeam, and the locking member comprises a fixing frame fixed on the secondary crossbeam and a wedge-shaped block slidably sleeved in the fixing frame, and the wedge-shaped block is adapted to the transverse sliding rod; a second spring abutting against the wedge-shaped block is provided in the fixing frame; An iron core is installed on the wedge block, and an electromagnet adapted to the iron core is installed on the fixing frame; The lifting platform is equipped with a sensor for detecting the interception member, and the main beam is equipped with a controller; In the initial state, the wedge block is in an extended state under the action of the second spring; When the sensor detects that the intercepting member is reset, a rising edge signal is sent to the controller, and the controller controls the electromagnet to energize and attract the iron core, so that the wedge block is retracted into the fixed frame.

[0014] As a further solution of the present invention: an openable and closable cover is provided at the opening at the upper end of the foundation pit, a second chamber is opened on one side of the foundation pit, a fourth spring is provided between the cover and the inner wall of the second chamber, a plurality of fourth guide wheels are rotatably installed in the second chamber, a third cable is connected to the cover, and an end of the third cable away from the cover passes around each group of fourth guide wheels in turn and is connected to the lifting platform.

[0015] Beneficial effects of the present invention: A buffer member that can buffer and decelerate a vehicle that exceeds the height limit and an interception member that can intercept and limit the wheels at the bottom of the vehicle that exceeds the height limit are provided. At the same time, under the action of the transmission member, when the vehicle that exceeds the height limit pushes the buffer member, the interception member is automatically triggered to rise from the foundation pit to intercept the wheels of the vehicle that exceeds the height limit; the buffer member can specifically block the vehicle that exceeds the height limit and force the vehicle that exceeds the height limit to actively decelerate, and at the same time, the interception member only intercepts the wheels of the vehicle that exceeds the height limit. The mutual cooperation of the buffer member and the interception member in the present invention mainly aims to effectively prevent the vehicle that exceeds the height limit from passing, and at the same time effectively avoid the damage to the vehicle or the height limit device caused by the rigid and violent collision between the vehicle that exceeds the height limit and the height limit device, thereby reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention assembled with a bridge roadbed; Figure 2 The structure of the present invention is schematically shown Figure 1 ; Figure 3 The structure of the present invention is schematically shown Figure 2 ; Figure 4 It is a schematic diagram of the structure of the auxiliary crossbeam and the transverse sliding rod in the present invention; Figure 5 It is a structural schematic diagram of the locking member in the present invention; Figure 6 It is a structural schematic diagram of the lifting platform and the column in the present invention; Figure 7 The structure of the buffer member in the present invention is schematically shown in FIG. Figure 1 ; Figure 8 The structure of the buffer member in the present invention is schematically shown in FIG. Figure 2 ; Fig. 9 is a side sectional view of the buffer member of the present invention; Fig.10 It is a structural schematic diagram of the lifting platform and the intercepting member in the present invention; Fig.11 It is a schematic diagram of the internal structure of the lifting platform in the present invention; Fig.12 It is a schematic diagram of the structure of the intercepting member in the present invention; Fig.13 It is a cross-sectional view of the bridge roadbed in the present invention.

[0018] In the figure: 100, column; 110, lifting chute; 200, main beam; 210, controller; 300, secondary crossbeam; 301, guide rod; 302, first spring; 310, side plate; 311, horizontal guide groove; 312, inclined guide groove; 320, locking member; 321, fixing frame; 322, wedge block; 323, second spring; 324, iron core; 325, electromagnet; 400, transverse sliding rod; 410, connecting rod; 411, vertical guide groove; 500, buffer; 510, sleeve rod; 520, rigid sleeve; 530, support frame; 540, elastic buffer belt; 550, buffer support; 551, shell; 552, T-shaped airbag; 553, third spring; 560, counterweight; 600, lifting platform; 610, first chamber; 620, winding drum; 630, first guide wheel; 640, first cable; 650, fixed plate; 660, winding spring; 670, sensor; 700, interception member; 710, interception plate; 720, anti-tilt bottom plate; 730, reinforcement rod; 740, ball bearing; 750, wheel cover; 760, roller; 800, transmission member; 810, second guide wheel; 820, third guide wheel; 830, second cable; 900 , bridge roadbed; 910 , foundation pit; 920 , second chamber; 930 , cover plate; 940 , fourth spring; 950 , fourth guide wheel; 960 , third cable. DETAILED DESCRIPTION

[0019] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0020] See also Figure 1 , Figure 2 and Figure 3 The present invention discloses a bridge construction height limiting device, which is applied to a bridge roadbed 900, on which a foundation pit 910 is provided; the bridge construction height limiting device comprises a column 100, a main beam 200, a secondary beam 300, a transverse sliding rod 400, a buffer 500, a lifting platform 600, an intercepting member 700 and a transmission member 800; wherein the column 100 is provided with two groups and is symmetrically and vertically buried on both sides of the foundation pit 910, and a lifting chute 110 is provided at the bottom of the column 100; the main beam 200 is fixedly installed at the top of the column 100; the secondary beam 300 is provided with two groups and is symmetrically and horizontally fixed on both sides of the main beam 200; the transverse sliding rod 400 is provided with a buffer 500, a lifting platform 600, an intercepting member 700 and a transmission member 800; wherein the column 100 is provided with two groups and is symmetrically and vertically buried on both sides of the foundation pit 910, and the bottom of the column 100 is provided with a lifting chute 110; the main beam 200 is fixedly installed at the top of the column 100; the secondary beam 300 is provided with two groups and is symmetrically and horizontally fixed on both sides of the main beam 200; the transverse sliding rod 400 is provided with a buffer 500, a lifting platform 600, an intercepting member 700 and a transmission member 800; wherein the column 1 ... 00 are slidably mounted on the corresponding secondary crossbeam 300 at both ends; the buffer 500 is mounted on the transverse sliding rod 400, and is used to buffer the vehicles exceeding the height limit; the initial height of the buffer 500 is lower than the preset height limit; the lifting platform 600 is provided with two groups and is respectively installed in the lifting chute 110 on the corresponding column 100 in a liftable manner; the interception member 700 is installed between the lifting platforms 600 on both sides, and is used to intercept the wheels of the vehicles exceeding the height limit; the transmission member 800 is used to drive the interception member 700 to rise from the foundation pit 910 and limit the forward travel of the wheels when the vehicles exceeding the height limit push the buffer 500 forward, so as to intercept the wheels of the vehicles exceeding the height limit; Specifically, the lower end of the column 100 is pre-buried in the foundation pit 910 of the bridge roadbed 900. In the initial state, the lifting platform 600 and the intercepting member 700 are always hidden in the foundation pit 910, so as not to affect the normal passage of vehicles below the height limit; the buffer member 500 is arranged on the side away from the passage direction of the bridge. In actual application, the initial height of the buffer member 500 is adjusted to the corresponding height according to the height limit requirements of the bridge, so that it does not affect the normal passage of vehicles below the height limit, and when the vehicle exceeding the height limit passes, the vehicle exceeding the height limit can be effectively blocked; When a vehicle exceeding the height limit passes, the top of the vehicle first contacts the buffer 500, and the buffer 500 performs preliminary buffering on the vehicle. The buffer 500 can move forward synchronously with the vehicle exceeding the height limit, thereby avoiding a rigid collision with the vehicle exceeding the height limit, and preventing damage to the height limit device and the vehicle. When the over-height vehicle drives the buffer 500 to move forward, the transverse sliding rod 400 also slides synchronously along the secondary cross beam 300 toward the main cross beam 200, and then, under the transmission of the transmission member 800, drives the lifting platform 600 at the lower end of the column 100 to rise synchronously, so as to pull the intercepting member 700 vertically upward from the foundation pit 910, so that the intercepting member 700 appears in front of the over-height vehicle. At this time, if the over-height vehicle continues to force its way through, the intercepting member 700 intercepts and restricts the wheels of the over-height vehicle to prevent the over-height vehicle from passing through. When the vehicle exceeding the height limit retreats, the buffer member 500 is automatically reset, and under the action of the transmission member 800, the lifting platform 600 drives the intercepting member 700 to retract into the foundation pit 910 again, thereby restoring the normal passage of vehicles below the height limit.

[0021] It should be noted that the core of the present invention is that a buffer member 500 for buffering and decelerating vehicles exceeding the height limit and an interception member 700 for intercepting and limiting the wheels at the bottom of the vehicles exceeding the height limit are provided. At the same time, under the action of the transmission member 800, when the vehicles exceeding the height limit push the buffer member 500, the interception member 700 is automatically triggered to rise from the foundation pit 910 to intercept the wheels of the vehicles exceeding the height limit; the buffer member 500 can carry out targeted blocking of vehicles exceeding the height limit and force the vehicles exceeding the height limit to actively decelerate, and at the same time, the interception member 700 only intercepts the wheels of the vehicles exceeding the height limit. The main purpose of the present invention is to effectively prevent the vehicles exceeding the height limit from passing through through the cooperation of the buffer member 500 and the interception member 700, and at the same time effectively avoid the damage to the vehicles or the height limit by the rigid and violent collision between the vehicles exceeding the height limit and the height limit device, thereby reducing the maintenance cost.

[0022] In one embodiment, after the top of the over-height vehicle contacts the buffer 500, if the over-height vehicle does not actively decelerate or still slides forward at a certain speed, the buffer 500 will be driven forward together. In this way, when the buffer 500 reaches the end of its own travel, the speed of the over-height vehicle may still be relatively high. At this time, the over-height vehicle still has a tendency to move forward, which may drag the buffer 500 and cause damage to the buffer 500. To do this, see Figure 4 The secondary cross beam 300 is provided with a side plate 310, and the side plate 310 is provided with a horizontal guide groove 311 and an inclined guide groove 312 connected to each other, and the inclined guide groove 312 is located on a side close to the main cross beam 200, and the end of the inclined guide groove 312 away from the horizontal guide groove 311 is inclined upward; The two ends of the transverse sliding rod 400 are vertically fixed with connecting rods 410, and a vertical guide groove 411 is provided in the connecting rod 410. The two ends of the buffer member 500 movably penetrate the vertical guide groove 411 and are adaptively connected with the corresponding horizontal guide groove 311 and the inclined guide groove 312. Specifically, when installing the buffer 500, the two ends of the buffer 500 are respectively passed through the vertical guide grooves 411 on the connecting rod 410 on the same side and embedded in the corresponding horizontal guide grooves 311. The two ends of the buffer 500 can slide adaptively in the vertical guide grooves 411, the horizontal guide grooves 311 and the inclined guide grooves 312. When the vehicle is about to reach the end of its travel, the two ends of the buffer 500 transition from the corresponding horizontal guide groove 311 to the inclined guide groove 312. At this time, the buffer 500 as a whole gradually tilts upward along the inclined guide groove 312, and the two ends of the buffer 500 also move upward relative to the vertical guide groove 411, so that the buffer 500 gradually separates from the top of the vehicle with excessive height in the vertical direction, and then the buffer 500 no longer blocks the vehicle with excessive height, so as to avoid the vehicle with excessive height continuing to move forward and dragging the buffer 500, causing damage to the buffer 500. It should be noted that, since the buffer member 500 has moved forward a certain distance in the horizontal direction at this time, the intercepting member 700 can be driven by the transmission member 800 to extend smoothly to effectively intercept the wheels of the vehicle that exceeds the height limit. At this time, even if the buffer member 500 has been separated from the vehicle that exceeds the height limit, due to the limitation of the vehicle that exceeds the height limit, the buffer member 500 cannot be reset to the horizontal guide groove 311 along the inclined guide groove 312, and therefore will not cause the intercepting member 700 to retract into the foundation pit 910 and lose its intercepting effect.

[0023] For further information, see Figure 4 and Figure 6 The transmission member 800 includes a second guide wheel 810, a third guide wheel 820 and a second cable 830, wherein the second guide wheel 810 is rotatably mounted on the secondary crossbeam 300, the third guide wheel 820 is rotatably mounted on the main crossbeam 200, one end of the second cable 830 is fixedly connected to the transverse sliding rod 400, and the other end of the second cable 830 is sequentially passed around the second guide wheel 810 and the third guide wheel 820 and fixedly connected to the lifting platform 600; Specifically, when the transverse slide bar 400 follows the buffer component 500 to move laterally toward the side of the main beam 200, the lifting platform 600 is pulled vertically upward along the lifting slide groove 110 by the second cable 830, thereby pulling the intercepting component 700 out of the foundation pit 910; when the transverse slide bar 400 follows the buffer component 500 to reset, the lifting platform 600 can automatically descend and retract into the foundation pit 910 under the action of gravity, thereby realizing the hidden storage of the intercepting component 700.

[0024] When the over-height-limited vehicle returns to the outside of the height-limited area, in order to facilitate the smooth reset of the transverse sliding bar 400, a guide rod 301 is horizontally fixed in the secondary crossbeam 300, and the transverse sliding bar 400 movably passes through the guide rod 301. A first spring 302 is sleeved on the guide rod 301, and the first spring 302 is located between the main crossbeam 200 and the transverse sliding bar 400; When the transverse slide bar 400 moves laterally toward the side of the main beam 200 following the buffer member 500, the first spring 302 is compressed; when the vehicle exceeding the height limit retreats outside the height limit area, the transverse slide bar 400 can automatically slide back and reset under the elastic force of the first spring 302.

[0025] In yet another embodiment, see Figure 7 , Figure 8 and Fig. 9 The buffer member 500 includes a sleeve rod 510 and a rigid sleeve 520 sleeved on the outside of the sleeve rod 510. An elastic buffer belt 540 is provided on the side of the rigid sleeve 520 away from the main cross beam 200. A support frame 530 is hinged between the elastic buffer belt 540 and the rigid sleeve 520. A buffer support member 550 is also provided on the side of the rigid sleeve 520 facing the elastic buffer belt 540. Specifically, the sleeve rod 510 is adapted to the vertical guide groove 411, the horizontal guide groove 311 and the inclined guide groove 312, and the rigid sleeve 520 is sleeved on the outside of the sleeve rod 510 to provide sufficient rigid support strength for the entire buffer member 500 to prevent it from bending defects when it is impacted by an over-height vehicle; the elastic buffer belt 540 is directly opposite to the front end of the vehicle to be passed. When the over-height vehicle passes, the elastic buffer belt 540 contacts the top of the vehicle and can adaptively bend and deform according to the contour of the contact position, thereby wrapping and buffering the top of the vehicle. When the over-height vehicle continues to move forward, the elastic buffer belt 540 is driven to expand elastically, so that the support frames 530 on both sides are also stretched outward until the elastic buffer belt 540 contacts the buffer support member 550, and the buffer support member 550 is used to further buffer the vehicle.

[0026] It should be noted that when the elastic buffer strip 540 contacts the top of the vehicle exceeding the height limit, the sleeve rod 510 can adaptively deflect relative to the connecting rod 410 and the side plate 310, so that the elastic buffer strip 540 can completely fit the outer contour of the top of the vehicle, thereby improving the buffering effect.

[0027] For further information, see Fig. 9 The buffer support 550 includes a shell 551 fixed on the rigid sleeve 520 and a T-shaped airbag 552 embedded in the shell 551. The T-shaped airbag 552 includes a main support portion facing the elastic buffer belt 540 and auxiliary support portions symmetrically distributed on both sides of the main support portion. A third spring 553 is arranged in the main support portion. When there is no external force, due to the elastic force of the third spring 553, the main support part of the T-shaped airbag 552 always extends out of the shell 551 and contacts the elastic buffer belt 540. When the elastic buffer belt 540 is pushed forward by the vehicle, the main support part will be compressed, so that the auxiliary support parts on both sides of the T-shaped airbag 552 will pop out of the shell 551, and the popped-out auxiliary support parts are used to auxiliary support the two sides of the elastic buffer belt 540, thereby further improving the buffering effect of the buffer component 500.

[0028] In addition, in order to ensure that the elastic buffer belt 540 is always facing the front of the passing vehicle in the initial state or after the buffer member 500 is reset, a counterweight block 560 is provided at the lower end of the rigid sleeve 520. The counterweight block 560 allows the overall center of gravity of the buffer member 500 to be directly below the axis of the sleeve rod 510, so that the elastic buffer belt 540 is always facing the front of the passing vehicle, so as to always maintain a stable posture to effectively accept the impact of the next over-height vehicle.

[0029] In further embodiments, see Fig.10 and Fig.11 The lifting platform 600 is provided with a first chamber 610, in which a plurality of winding drums 620 are rotatably installed, and a first cable 640 connected to the intercepting member 700 is wound on the winding drum 620. The inner wall of the first chamber 610 is also provided with a fixed disk 650 corresponding to each winding drum 620, and a coil spring 660 is installed in the fixed disk 650, and the two ends of the coil spring 660 are respectively fixedly connected to the inner wall of the fixed disk 650 and the rotating shaft of the winding drum 620; the first chamber 610 is also rotatably installed with a first guide wheel 630 for guiding the first cable 640, so that the end of the first cable 640 extending out of the first chamber 610 always maintains a horizontal posture; Specifically, when the wheel of the over-height vehicle contacts the interception member 700, the interception member 700 can be pushed forward synchronously within a certain range, thereby further providing deceleration time for the over-height vehicle, so that the over-height vehicle has sufficient time to decelerate until it stops smoothly. In this process, the first cable 640 is pulled out, and as the length of the first cable 640 pulled out increases, the coil spring 660 is tightened continuously, thereby increasing the resistance applied to the interception member 700, until the coil spring 660 is completely tightened, at which time the interception member 700 reaches the travel limit, thereby completely intercepting the over-height vehicle. When the vehicle exceeding the height limit moves back, the tightened coil spring 660 releases elastic potential energy, thereby pulling back the first cable 640 and winding it around the winding drum 620, thereby driving the intercepting member 700 to reset.

[0030] Furthermore, considering that the over-height vehicle pushes the interception member 700 to move forward synchronously, in order to prevent the interception member 700 from tipping over and causing interception failure, please refer to Fig.10 The intercepting member 700 includes an intercepting plate 710 connected to the first cable 640, and an anti-tilt bottom plate 720 is provided on a side of the intercepting plate 710 away from the buffer member 500. A reinforcing rod 730 is connected between the anti-tilt bottom plate 720 and the intercepting plate 710, and a plurality of balls 740 are installed on the bottom surface of the anti-tilt bottom plate 720; Since the anti-tilt bottom plate 720 is arranged on the side of the intercepting plate 710 away from the over-height vehicle, when the vehicle pushes the intercepting plate 710 forward, the anti-tilt bottom plate 720 is always supported on the bridge roadbed 900, thereby effectively preventing the intercepting plate 710 from tipping over or tilting forward, and allowing the intercepting plate 710 to always maintain a vertical posture during the forward movement, thereby providing a stable and reliable intercepting function; wherein, the ball bearings 740 are arranged at the bottom of the anti-tilt bottom plate 720, which can roll relative to the bridge roadbed 900, thereby reducing the forward movement resistance of the intercepting member 700, and at the same time avoiding the friction between the intercepting member 700 and the bridge roadbed 900 during the forward movement, thereby avoiding damage to the bridge roadbed 900 and the intercepting member 700.

[0031] Also, see Fig.12 In order to make the intercepting member 700 better fit with the wheel of the vehicle exceeding the height limit, a wheel cover 750 is provided on the side of the intercepting plate 710 close to the buffer member 500, and a recessed portion adapted to the wheel is provided in the wheel cover 750, and a plurality of groups of rollers 760 are arranged in an array in the recessed portion; When a vehicle exceeding the height limit contacts the intercepting member 700, the wheel of the vehicle just enters the recessed portion of the wheel cover 750 and fits with the rollers 760, thereby increasing the contact area between the intercepting member 700 and the wheel. At the same time, the rotation of the wheel can drive the rollers 760 to rotate synchronously, thereby avoiding sliding friction between the wheel and the wheel cover 750 and causing severe wear on both. In addition, the wheel can apply pressure perpendicular to the normal of the arc surface of the recessed portion to the wheel cover 750, and the pressure is tilted downward as a whole, thereby enabling the entire intercepting member 700 to fit more stably on the bridge roadbed 900, further preventing the intercepting member 700 from tipping over.

[0032] In another embodiment, considering that the heights of various areas of the entire body of a vehicle exceeding the height limit may be different, if the front end height of the vehicle exceeding the height limit is higher than the height limit, while the rear end height is lower than the height limit, for this special working condition, when the buffer 500 is pushed to the end of its stroke by the vehicle exceeding the height limit, the buffer 500 will temporarily rise and disengage from the front end of the vehicle under the guidance of the inclined guide groove 312. Subsequently, since the height of the rear end of the vehicle is lower than the height limit, the buffer 500 is no longer restricted by the vehicle, causing the buffer 500 to drop again and return along the horizontal guide groove 311, thereby driving the interception member 700 to retract into the foundation pit 910, resulting in interception failure. For the above situation, please refer to Figure 4 and Figure 5 The secondary cross beam 300 is provided with a locking member 320, and the locking member 320 includes a fixing frame 321 fixed on the secondary cross beam 300 and a wedge block 322 slidably sleeved in the fixing frame 321, and the wedge block 322 is adapted to the transverse sliding rod 400; the fixing frame 321 is provided with a second spring 323 abutting against the wedge block 322; The wedge block 322 is provided with an iron core 324, and the fixing frame 321 is provided with an electromagnet 325 adapted to the iron core 324; The lifting platform 600 is provided with a sensor 670 for detecting the intercepting member 700, and the main beam 200 is provided with a controller 210; In the initial state, the wedge block 322 is in an extended state under the action of the second spring 323; When the sensor 670 detects that the intercepting member 700 is reset, it sends a rising edge signal to the controller 210, and the controller 210 controls the electromagnet 325 to energize and attract the iron core 324, so that the wedge block 322 is retracted into the fixing frame 321; Specifically, under the elastic force of the second spring 323, the wedge block 322 always remains in the extended state. When the buffer member 500 reaches the end of the stroke, the transverse sliding bar 400 also moves from one side of the wedge block 322 to the other side accordingly. The wedge block 322 first retracts when the transverse sliding bar 400 is pushed. When the transverse sliding bar 400 reaches the other side of the wedge block 322, the wedge block 322 extends again under the action of the second spring 323, thereby locking the transverse sliding bar 400, and then making the transverse sliding bar 400 and the buffer member 500 unable to reset themselves, so as to ensure the effective interception function of the interception member 700. Only after the over-height vehicle retreats, the interception member 700 is reset again. At this time, the sensor 670 detects the interception member 700 and generates a rising edge signal. After receiving the rising edge signal, the controller 210 controls the electromagnet 325 to be temporarily energized, thereby attracting the iron core 324 and retracting the wedge block 322 into the fixing frame 321 to release the lock of the transverse sliding bar 400. The transverse sliding bar 400 is automatically reset, and then the interception member 700 is also synchronously retracted into the foundation pit 910. It should be noted that the purpose of providing the locking member 320 is to lock the status of the buffer member 500 and the intercepting member 700 to prevent the buffer member 500 and the intercepting member 700 from being accidentally reset and causing interception failure. At the same time, after the over-height vehicle is retracted, the controller 210 is used to control the locking member 320 to automatically unlock, so that the buffer member 500 and the intercepting member 700 are automatically reset.

[0033] In addition, the triggering condition for the electromagnet 325 to attract the iron core 324 is only when the interception member 700 is reset. Under other conditions, the electromagnet 325 is in a power-off state, and after the triggering condition occurs, the electromagnet 325 is only powered on for a short period of time, so that the wedge block 322 can be extended again after the transverse slide bar 400 is reset. The signal when the sensor 670 detects the intercepting member 700 is defined as 1, and the signal when the sensor 670 does not detect the intercepting member 700 is defined as 0; when the signal changes from 1 to 0, that is, when the intercepting member 700 is pushed out from the initial position, the sensor 670 generates a falling edge signal; when the signal changes from 0 to 1, that is, when the intercepting member 700 is reset from the pushed position to the initial position, the sensor 670 generates a rising edge signal, and the controller 210 triggers the electromagnet 325 to energize only when it receives the rising edge signal.

[0034] For further information, see Fig.13In order not to affect the normal passage of vehicles below the height limit and to avoid damage to the interception member 700 in the foundation pit 910, an openable cover plate 930 is provided at the upper opening of the foundation pit 910, a second chamber 920 is provided on one side of the foundation pit 910, a fourth spring 940 is provided between the cover plate 930 and the inner wall of the second chamber 920, a plurality of fourth guide wheels 950 are rotatably installed in the second chamber 920, a third cable 960 is connected to the cover plate 930, and one end of the third cable 960 away from the cover plate 930 sequentially bypasses each group of fourth guide wheels 950 and is connected to the lifting platform 600; Specifically, when the lifting platform 600 rises, the cover plate 930 is pulled by the third cable 960 to retract the cover plate 930 into the second chamber 920, so that the upper opening of the foundation pit 910 is opened synchronously, which facilitates the smooth lifting of the intercepting member 700; and when the lifting platform 600 drives the intercepting member 700 to retract into the foundation pit 910, the cover plate 930 automatically pops out of the second chamber 920 under the elastic force of the fourth spring 940 and closes the upper opening of the foundation pit 910; It should be noted that, in actual applications, the height and width of the cover plate 930 can be set accordingly, so that during the lifting and lowering process of the intercepting member 700, the cover plate 930 will not interfere with the intercepting member 700.

[0035] The specific implementation methods of this embodiment are described above, but this embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms inspired by this embodiment, all of which are within the protection of this embodiment.

Claims

1. A bridge construction height limiting device, applied to a bridge roadbed (900), wherein a foundation pit (910) is provided on the bridge roadbed (900); characterized in that: The bridge building height limiting device comprises: Two groups of columns (100) are provided and are symmetrically and vertically buried on both sides of the foundation pit (910), and a lifting chute (110) is provided at the bottom of the columns (100); A main crossbeam (200) is fixedly mounted on the top of the column (100); Auxiliary crossbeams (300) are provided in two groups and are symmetrically and horizontally fixed on both sides of the main crossbeam (200); A transverse sliding rod (400), both ends of which are slidably mounted on corresponding secondary crossbeams (300); A buffer member (500) is mounted on the transverse sliding rod (400) and is used to buffer a vehicle that exceeds the height limit; an initial height of the buffer member (500) is lower than a preset height limit; A lifting platform (600) is provided with two groups and is respectively installed in lifting slots (110) on corresponding columns (100) in a liftable manner; An interception member (700) is installed between the lifting platforms (600) on both sides and is used to intercept the wheels of vehicles that exceed the height limit; The transmission member (800) is used to drive the interception member (700) to extend out of the foundation pit (910) and limit the forward travel of the wheels when the vehicle exceeding the height limit pushes the buffer member (500) forward, so as to intercept the wheels of the vehicle exceeding the height limit.

2. A bridge construction height limiting device according to claim 1, characterized in that: The secondary crossbeam (300) is provided with a side plate (310), and the side plate (310) is provided with a horizontal guide groove (311) and an inclined guide groove (312) connected to each other, the inclined guide groove (312) is located on a side close to the main crossbeam (200), and one end of the inclined guide groove (312) away from the horizontal guide groove (311) is inclined upward; The two ends of the transverse sliding rod (400) are vertically fixed with connecting rods (410), and a vertical guide groove (411) is provided in the connecting rod (410). The two ends of the buffer member (500) movably penetrate the vertical guide groove (411) and are adaptively connected to the corresponding horizontal guide groove (311) and the inclined guide groove (312).

3. A bridge construction height limiting device according to claim 1, characterized in that: The transmission member (800) comprises: A second guide wheel (810) is rotatably mounted on the secondary crossbeam (300); A third guide wheel (820) is rotatably mounted on the main crossbeam (200); The second cable (830) has one end fixedly connected to the transverse sliding rod (400), and the other end passes around the second guide wheel (810) and the third guide wheel (820) in sequence and is fixedly connected to the lifting platform (600).

4. A bridge construction height limiting device according to claim 1, characterized in that: The buffer member (500) comprises a sleeve rod (510) and a rigid sleeve (520) sleeved outside the sleeve rod (510); an elastic buffer belt (540) is provided on a side of the rigid sleeve (520) away from the main cross beam (200); a support frame (530) is hinged between the elastic buffer belt (540) and the rigid sleeve (520); and a buffer support member (550) is further provided on a side of the rigid sleeve (520) facing the elastic buffer belt (540).

5. A bridge construction height limiting device according to claim 4, characterized in that: The buffer support member (550) comprises a shell (551) fixed on a rigid sleeve (520) and a T-shaped airbag (552) embedded in the shell (551); the T-shaped airbag (552) comprises a main support portion facing the elastic buffer belt (540) and auxiliary support portions symmetrically distributed on both sides of the main support portion; a third spring (553) is arranged in the main support portion.

6. A bridge construction height limiting device according to claim 1, characterized in that: The lifting platform (600) is provided with a first chamber (610), in which a plurality of winding drums (620) are rotatably installed, and a first cable (640) connected to the intercepting member (700) is wound on the winding drum (620). The inner wall of the first chamber (610) is also provided with a fixed disk (650) corresponding to each winding drum (620), and a coiled spring sheet (660) is installed in the fixed disk (650), and the two ends of the coiled spring sheet (660) are respectively fixedly connected to the inner wall of the fixed disk (650) and the rotating shaft of the winding drum (620); and a first guide wheel (630) for guiding the first cable (640) is also rotatably installed in the first chamber (610).

7. A bridge construction height limiting device according to claim 6, characterized in that: The intercepting member (700) comprises an intercepting plate (710) connected to the first cable (640); an anti-tilt bottom plate (720) is provided on a side of the intercepting plate (710) away from the buffer member (500); a reinforcing rod (730) is connected between the anti-tilt bottom plate (720) and the intercepting plate (710); and a plurality of rolling balls (740) are installed on the bottom surface of the anti-tilt bottom plate (720).

8. A bridge construction height limiting device according to claim 7, characterized in that: A wheel cover (750) is arranged on one side of the intercepting plate (710) close to the buffer member (500), a recessed portion adapted to the wheel is arranged in the wheel cover (750), and a plurality of groups of rotating rollers (760) are arranged in an array in the recessed portion.

9. A bridge construction height limiting device according to claim 1, characterized in that: The secondary crossbeam (300) is provided with a locking member (320), the locking member (320) comprising a fixing frame (321) fixed on the secondary crossbeam (300) and a wedge block (322) slidably sleeved in the fixing frame (321), the wedge block (322) being adapted to the transverse sliding rod (400); the fixing frame (321) is provided with a second spring (323) abutting against the wedge block (322); An iron core (324) is mounted on the wedge block (322), and an electromagnet (325) adapted to the iron core (324) is mounted on the fixing frame (321); A sensor (670) for detecting the intercepting member (700) is installed on the lifting platform (600), and a controller (210) is installed on the main crossbeam (200); In the initial state, the wedge block (322) is in an extended state under the action of the second spring (323); When the sensor (670) detects that the intercepting member (700) is reset, a rising edge signal is sent to the controller (210), and the controller (210) controls the electromagnet (325) to energize and attract the iron core (324), so that the wedge block (322) retracts into the fixing frame (321).

10. A bridge construction height limiting device according to claim 1, characterized in that: An openable cover plate (930) is provided at the upper opening of the foundation pit (910); a second chamber (920) is provided on one side of the foundation pit (910); a fourth spring (940) is provided between the cover plate (930) and the inner wall of the second chamber (920); a plurality of fourth guide wheels (950) are rotatably installed in the second chamber (920); a third cable (960) is connected to the cover plate (930); an end of the third cable (960) away from the cover plate (930) passes around each group of fourth guide wheels (950) in turn and is connected to the lifting platform (600).

Images