CN104532734B - A kind of lift bridge - Google Patents

Abstract

The invention discloses a lifting bridge in the technical field of bridges, which comprises a bridge body horizontally arranged above a river, two supporting towers are arranged on both sides of the river, and lifting arms are respectively arranged at the four corners of the bridge body. There is a movable pulley block on the side, and a fixed pulley block on the upper part of the supporting tower. A beam is fixed between the supporting towers on the same side of the river bank. A driving device is installed on the beam. The driving device includes a rotatable rope drum. The pulley block and the movable pulley block are wound on the rope drum; the lifting arm is also equipped with an anchor, which is connected to one end of the balance cable, and the upper part of the support tower is also equipped with a reversing guide wheel, and the balance cable bypasses the reversing guide wheel , the other end of the balance cable is connected with a balance weight. When working, the balance block can balance the gravity of most of the bridge body, and the driving mechanism only needs a small power to raise and lower the bridge body. The device has a simple structure and low energy consumption, and can be used on rivers that often need to be navigated .

Description

a lifting bridge

technical field

The invention relates to a bridge device, in particular to a liftable bridge device.

Background technique

In the Chinese patent database, there is a balanced motorized lifting bridge, its application number: 90110096.X application date: 1990-12-21, publication number: CN1052643; publication date: 1991-07-03, the two ends of the bridge body of the device Set bridge boxes symmetrically, one or two at each end. The bridge is composed of bridge boxes, operating platform, steel wire rope, hoistway column, bridge body, beam, beam plate, wire rope wheel, main beam and auxiliary power unit. The bridge body and main beam Supported by shaft columns or piers, one or two bridge boxes are installed at both ends of the bridge body. An operating platform is installed in the bridge box. on wheels. It adopts the shaft structure perpendicular to the ground to make the bridge box lift up and down to convey the flow of people and vehicles, and cancels the approach bridge, so that its footprint is greatly reduced, thus effectively solving the problem of non-motorized traffic caused by the inability to implement three-dimensional intersections in urban road traffic. The problem that traffic flow and motor vehicle flow obstruct each other and block each other. Its shortcoming is: this device is applicable to urban road traffic, and can not be applicable to on the river course.

In the Chinese patent database, there is also a connection device between the bridge plate and the pier of the lifting bridge, its application number: 201420461624.9; application date: 2014-08-15; publication number: 204000578U; publication date: 2014-12-10; the device includes a base , hydraulic pump, hydraulic rod, partition, shock absorbing device, roof, wherein the base is connected to the bridge pier, the hydraulic pump is fixed on the base, the upper end of the hydraulic rod is connected to the partition, a shock absorbing device is set between the partition and the top board, and the top board is connected to the bridge Board fixed connection. The adjustable amount of the device is small and cannot carry out large-scale lifting.

Contents of the invention

The object of the present invention is to provide a lifting bridge, which can be arranged on the river without affecting the sailing.

The purpose of the present invention is achieved in the following way: a lift bridge, comprising a bridge body horizontally arranged above the river, two supporting towers are respectively arranged on both sides of the river, lifting arms are respectively arranged at the four corners of the bridge body, and There is a movable pulley block on the side, and a fixed pulley block on the upper part of the supporting tower. A beam is fixed between the supporting towers on the same side of the river bank. A driving device is installed on the beam. The driving device includes a rotatable rope drum. The pulley block and the movable pulley block are wound on the rope drum; the lifting arm is also equipped with an anchor, which is connected to one end of the balance cable, and the upper part of the support tower is also equipped with a reversing guide wheel, and the balance cable bypasses the reversing guide wheel , the other end of the balance cable is connected with a balance block; the horizontal section of the support tower is I-shaped, the balance block is set in the I-shaped outer groove away from the river, and the lifting arm is inserted into the I-shaped inner groove facing the river. In the groove, an outer guide mechanism is arranged between the balance weight and the I-shaped outer groove, and an inner guide mechanism is arranged between the lifting arm and the I-shaped inner groove.

When the device works, the balance weight can balance the gravity of most of the bridge body, so that the driving mechanism can raise and lower the bridge body with only a small power, the balance weight can slide along the I-shaped outer groove, and the lifting arm can also It can slide along the inner groove of the I-shape to ensure the stable rise and fall of the bridge body. When the bridge body is raised, it is convenient for river navigation; when the bridge body is lowered, vehicles and pedestrians can pass on the bridge deck. The device has a simple structure and low energy consumption, and can be used on rivers that often need to be navigated.

In order to facilitate the positioning of the bridge body, support blocks are fixed on the supporting surfaces on both sides of the river, and the lower side of the lifting arm is provided with a support base. The support base is provided with an upward depression. When the bridge body is seated, the support block is inserted into the depression. . The supporting blocks and the depressions match each other, which can prevent the displacement of the bridge body, and also have a certain deviation-correcting effect when the bridge body is seated.

In order to reduce the impact when the bridge body is seated, buffer mechanisms corresponding to the positions of the lifting arms are provided on the supporting surfaces on both sides of the river.

As a further improvement of the present invention, a limit block is provided on the end face of the lifting arm facing the supporting tower, and a lower locking mechanism and an upper locking mechanism are arranged on the supporting tower corresponding to the bridge body seating and lifting limit positions, and the lower locking mechanism The mechanism and the upper locking mechanism correspond to the position of the limit block respectively. The bridge body can be locked in two positions through the upper locking mechanism and the lower locking mechanism, one is the seated position, and the bridge body can pass normally; the other is the raised limit position, and the river can be navigated. The upper locking mechanism and the lower locking mechanism can have the same structure; they respectively include an outer guide cylinder fixed on the support tower, an inner guide cylinder is arranged in the outer guide cylinder, and an oil cylinder is arranged at the center of the inner guide cylinder, and the oil cylinder The cylinder body is connected with the end cover through the pin shaft, the end cover is fixed with the outer guide cylinder, the piston rod extension end of the oil cylinder is relatively fixed with the inner guide cylinder, and the inner guide cylinder is provided with a locking arm facing the side of the limit block. When the oil cylinder is working, the locking arm can be pushed to extend or retract. After the bridge body is seated, when the oil cylinder corresponding to the lower locking mechanism drives the corresponding locking arm to extend, the corresponding locking arm of the lower locking mechanism is just located on the upper side of the limit block; The upward movement of the bridge body can be restricted, and the support block and the recess match each other, and the two will not be separated from each other. When the bridge body rises to the upper limit position, when the corresponding oil cylinder of the upper locking mechanism drives the corresponding locking arm to stretch out, the corresponding locking arm of the upper locking mechanism is just positioned at the lower side of the limit block. This blocks downward movement of the bridge, allowing the bridge to remain in the raised position even when the drive is inactive.

As a further improvement of the present invention, the inner guide mechanism and the outer guide mechanism have the same structure, including a guide block and a guide groove respectively, and the guide block is snapped into the guide groove; the guide block is installed on the fixed part, and the guide groove is installed on the On the movable parts, there are four sets of inner guide mechanisms, which are respectively arranged between the end of each lifting arm and the corresponding supporting tower; two sets of outer guide mechanisms are symmetrically arranged on the side of each balance block. The above-mentioned fixed part is a support tower, and the moving part is a lifting arm or a balance weight. The inner guide mechanism and the outer guide mechanism have the function of stabilizing the guide and can avoid unbalanced load.

In order to further reduce the possibility of unbalanced load, two groups of driving devices are respectively provided on the beams on each side of the river bank, each group of driving devices includes a motor, a reducer and a rope drum, and the output shaft of the motor is driven by the reducer and the rope drum. Connection, the output shafts of the two motors are connected through the linkage shaft. The linkage shaft can drive the rope drum to rotate synchronously to ensure that the bridge body can be raised or lowered horizontally.

Corresponding to the two limit positions of seating and lifting of the bridge body, the four corners of the corresponding positions of the balance weight are respectively provided with balance weight locking pieces, and the balance weight locking pieces have the same structure as the upper locking mechanism and the lower locking mechanism. In the two limit positions of the bridge body sitting and rising, the balance weight can also be locked to keep the bridge body in a stable seating and rising state.

To facilitate automatic control, a limit switch is provided on the side of the locking arm, and the limit switch is triggered when the locking arm is stretched out. The oil inlet or oil return of the oil cylinder is controlled by the on-off signal of the limit switch to realize automatic locking or unlocking.

Description of drawings

Fig. 1 is a front view of the lifting bridge of the present invention.

Fig. 2 is a left view of the lifting bridge of the present invention.

Fig. 3 is a view from M-M direction in Fig. 1 .

Fig. 4 is a view from N-N direction in Fig. 1 .

Fig. 5 is a view from the S-S direction in Fig. 2 .

Fig. 6 is a top view of the driving device of the lifting bridge of the present invention.

FIG. 7 is a partially enlarged view of A in FIG. 1 .

FIG. 8 is a partially enlarged view of B in FIG. 3 .

FIG. 9 is a partially enlarged view of C in FIG. 3 .

detailed description

As shown in Figure 1-8, it is a lifting bridge, the bridge body 18 is horizontally arranged above the river, and two supporting towers 11 are arranged on both sides of the river, there are four in total, marked as the first in Figure 3 The supporting tower 1101, the second supporting tower 1102, the third supporting tower 1103 and the fourth supporting tower 1104; the four corners of the bridge body 18 are respectively provided with a lifting arm 20, and the upper side of the lifting arm 20 is provided with a movable pulley block 17, The upper part of the supporting tower 11 is provided with a fixed pulley block 7, and a crossbeam 24 is fixed between the supporting towers 11 on the same side of the river bank. The driving device 9 is installed on the crossbeam 24, and two groups of driving devices are respectively arranged on the crossbeam 24 on each side of the river bank. , each group of driving devices includes a motor 903, a reducer 904 and a rope drum 901, the output shaft of the motor 903 is connected with the rope drum 901 through the reducer 904, and the output shafts of the two motors 903 are connected through a linkage shaft 902. The linkage shaft 902 can drive the rope drum 901 to rotate synchronously. The hoisting cable 4 bypasses the fixed pulley block 7 and the movable pulley block 17 and then is wound on the rope drum 901; the lifting arm 20 is also provided with an anchor 12, and the anchor 12 is connected with one end of the balance cable 3 to support the tower. The upper part of 11 is also provided with a reversing guide wheel 6, the balance cable 3 bypasses the reversing guide wheel 6, and the other end of the balance cable 3 is connected with a balance block 5; the horizontal section of the support tower 11 is I-shaped, and the balance block 5 is arranged on In the I-shaped outer groove away from the river, the lifting arm 20 is inserted into the I-shaped inner groove towards the river, and an outer guide mechanism 22 is arranged between the balance weight 5 and the I-shaped outer groove, and the lifting arm 20 and the working An inner guide mechanism 23 is arranged between the inner grooves of the font.

Supporting blocks 16 are fixed on the supporting surfaces on both sides of the river, and the underside of the lifting arm 20 is provided with a supporting seat 15, and the supporting seat 15 is provided with an upward depression. The support block 16 and the depression match each other, which can prevent the displacement of the bridge body, and also have a certain deviation-correcting effect when the bridge body is seated. In order to reduce the impact when the bridge body is seated, buffer mechanisms 14 corresponding to the positions of the lifting arms 20 are provided on the supporting surfaces on both sides of the river.

Lifting arm 20 is provided with limit piece 21 on the end face towards supporting tower 11, and supporting tower 11 is provided with lower locking mechanism 13 and upper locking mechanism 10 correspondingly with bridge body seating and rising limit position, and lower locking mechanism 13 and The upper locking mechanism 10 corresponds to the positions of the limit blocks 21 respectively. The bridge body 18 can be locked in two positions by the upper locking mechanism 10 and the lower locking mechanism 13, one is the seated position, the bridge body 18 can pass through normally; the other is the raised limit position, the river course can be navigated. The upper locking mechanism 10 and the lower locking mechanism 13 can have the same structure; respectively comprise an outer guide cylinder 1001 fixed on the supporting tower, an inner guide cylinder 1007 is arranged in the outer guide cylinder 1001, and an inner guide cylinder 1007 is provided in the center of the inner guide cylinder 1007. Oil cylinder 1002, the cylinder body of oil cylinder 1002 is connected with end cover 1006 through pin shaft 1003, end cover 1006 is fixed with outer guide cylinder 1001, the piston rod extension end of oil cylinder 1002 is relatively fixed with inner guide cylinder 1007, and inner guide cylinder 1007 faces the limit One side of the block is provided with a locking arm 1004 . When the oil cylinder 1002 is working, the locking arm 1004 can be pushed to extend or retract. After the bridge body is seated, when the oil cylinder corresponding to the lower locking mechanism 13 drives the corresponding locking arm to extend, the corresponding locking arm of the lower locking mechanism is just positioned at the limit block. 21 upper side; this can limit the upward movement of the bridge body 18, the support block and the depression match each other, and the two will not break away from each other. The bridge body 18 is raised to the upper limit position, and when the corresponding oil cylinder of the upper locking mechanism drives the corresponding locking arm to stretch out, the corresponding locking arm of the upper locking mechanism is just positioned at the lower side of the limit block 21 . This can block the downward movement of the bridge body, even if the driving device 9 is not working, the bridge body 18 can remain in the raised position.

The inner guide mechanism 23 and the outer guide mechanism 22 in this device can also have the same structure, as shown in Figure 8, the outer guide mechanism 22 includes a guide block 2201 and a guide groove 2202 respectively, and the guide block 2201 snaps into the guide groove 2202; Figure 9 shows the inner guide mechanism 23, which respectively includes a guide block 2302 and a guide groove 2301, and the guide block 2302 snaps into the guide groove 2301; the guide block is installed on the fixed part, and the guide groove is installed on the movable part; There are four groups of inner guide mechanisms, which are respectively arranged between the end of each lifting arm and the corresponding support tower; each balance block 5 is symmetrically provided with two sets of outer guide mechanisms. The above-mentioned fixed parts are the corresponding support towers 11, the moving parts are the lifting arms 20 or the balance weight 5, the inner guide mechanism 23 and the outer guide mechanism 22 have the function of stabilizing the guide, and can avoid unbalanced load.

Corresponding to the two extreme positions of seating and rising of the bridge body 18, the four corners of the corresponding positions of the balance weight 5 are respectively provided with balance weight locks 19, and the balance weight locks 19 can have the same structure as the upper locking mechanism and the lower locking mechanism. In the two limit positions of the bridge body being seated and raised, the balance weight 5 can also be locked, so that the bridge body remains in a stable seated and raised state.

To facilitate automatic control, a limit switch 1005 is provided on the side of the locking arm 1004, and the limit switch 1005 is triggered to act when the locking arm 1004 is stretched out. Through the on-off signal of the limit switch 1005, the oil inlet or oil return of the oil cylinder is controlled to realize automatic locking or unlocking.

When the device works, the balance weight 5 can balance the gravity of most of the bridge body 18, so that the drive mechanism 9 only needs a small power to raise and lower the bridge body 18, and the balance weight 5 can move along the I-shaped outer groove. Sliding, the lifting arm 20 can also slide along the inner groove of the I-shaped, which can ensure that the bridge body rises and falls stably. When the bridge body is raised, it is convenient for river navigation; when the bridge body is lowered, vehicles and pedestrians can pass on the bridge deck. The device has a simple structure and low energy consumption, and can be used on rivers that often need to be navigated.

The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and modifications to some of the technical features according to the disclosed technical content without creative work. Deformation, these replacements and deformations are all within the protection scope of the present invention.

Claims (10)

1. A lifting bridge, comprising a bridge body horizontally arranged above the river, two supporting towers are respectively arranged on both sides of the river, it is characterized in that: the four corners of the bridge body are respectively provided with lifting arms, and the upper side of the lifting arms is provided with A movable pulley block, a fixed pulley block is installed on the upper part of the support tower, and a beam is fixed between the support towers on the same side of the river bank, and a driving device is installed on the beam. The pulley block is wound on the rope drum; the lifting arm is also equipped with an anchor piece, which is connected to one end of the balance cable, and the upper part of the support tower is also equipped with a reversing guide pulley, the balance steel cable bypasses the reversing guide pulley, and the balance steel cable The other end of the cable is connected with a balance block; the horizontal section of the support tower is I-shaped, the balance block is arranged in the I-shaped outer groove away from the river, and the lifting arm is inserted into the I-shaped inner groove facing the river. An outer guide mechanism is arranged between the balance weight and the I-shaped outer groove, and an inner guide mechanism is arranged between the lifting arm and the I-shaped inner groove. 2. A lifting bridge according to claim 1, characterized in that: supporting blocks are fixed on the supporting surfaces on both sides of the river, the lower side of the lifting arm is provided with a supporting seat, and the supporting seat is provided with an upward depression, and the bridge When the body is seated, the support block is inserted into the depression. 3. A lift bridge according to claim 2, characterized in that buffer mechanisms corresponding to the positions of the lifting arms are provided on the supporting surfaces on both sides of the river. 4. A lifting bridge according to claim 2 or 3, characterized in that: the end face of the lifting arm facing the supporting tower is provided with a limit block, and the supporting tower is opposite to the seating and lifting limit positions of the bridge body. Correspondingly, a lower locking mechanism and an upper locking mechanism are provided, and the lower locking mechanism and the upper locking mechanism respectively correspond to the positions of the limit blocks. 5. A lifting bridge according to claim 4, characterized in that: the upper locking mechanism and the lower locking mechanism have the same structure; they respectively include outer guide cylinders fixed on the support tower, and the outer guide cylinders are equipped with There is an inner guide cylinder, and the center of the inner guide cylinder is equipped with an oil cylinder. The cylinder body of the oil cylinder is connected with the end cover through the pin shaft, and the end cover is fixed with the outer guide cylinder. The piston rod extension end of the oil cylinder is relatively fixed with the inner guide cylinder. A locking arm is provided on the side of the guide cylinder facing the limit block. 6. A lifting bridge according to claim 5, characterized in that: after the bridge body is seated, when the oil cylinder corresponding to the lower locking mechanism drives the corresponding locking arm to extend out, the corresponding locking arm of the lower locking mechanism is just positioned at the limit block Upper side: when the bridge body rises to the upper limit position, when the oil cylinder corresponding to the upper locking mechanism drives the corresponding locking arm to stretch out, the corresponding locking arm of the upper locking mechanism is just located at the lower side of the limit block. 7. A lifting bridge according to claim 5, characterized in that: the inner guide mechanism and the outer guide mechanism have the same structure, respectively comprising a guide block and a guide groove, and the guide block is snapped into the guide groove; The block is installed on the fixed part, and the guide groove is installed on the movable part; there are four groups of inner guide mechanisms, which are respectively arranged between the end of each lifting arm and the corresponding support tower; each side of each balance block is symmetrically arranged with two groups Outer guides. 8. A lifting bridge according to claim 5, characterized in that: two groups of driving devices are respectively arranged on the crossbeams of the river bank on each side, and each group of driving devices includes a motor, a reducer and a rope drum, and the motor's The output shaft is connected with the rope drum through the speed reducer, and the output shafts of the two motors are connected through the linkage shaft. 9. A lifting bridge according to claim 5, characterized in that: corresponding to the two limit positions of the bridge body seated and raised, the four corners of the corresponding positions of the balance weight are respectively provided with balance weight locking pieces, the The balance block locking piece has the same structure as the upper locking mechanism and the lower locking rear mechanism. 10 . The lifting bridge according to claim 5 , wherein a limit switch is provided on the side of the locking arm, and the limit switch is triggered when the locking arm is stretched out. 11 .