A new energy-saving self-balancing helicopter opening bridge

Abstract

The present invention discloses a novel energy-saving self-balancing vertical opening bridge, which includes an opening span, a lifting tower, a load-bearing sling and a driving drum. A self-balancing side span is arranged on the outer side of the lifting tower. The load-bearing sling passes around the driving drum and is connected to one end of the self-balancing side span close to the lifting tower, so that the end of the self-balancing side span forms a vertical movable end. The other end of the self-balancing side span is hingedly connected to a fixed part to form a connection structure that can rotate up and down, so that the vertical movable end of the self-balancing side span is adjacent to the opening span. The present invention utilizes the structural deadweight of the rotatable self-balancing side span and arranges additional counterweights therein, so that the vertical gravity of the self-balancing side span on one side of the lifting tower can be roughly equal to the vertical gravity of one end of the opening span, thereby completely eliminating the arrangement of counterweights in the lifting tower, expanding the applicable span of the vertical opening bridge, and reducing the energy consumption of the opening and closing operation.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction engineering, and in particular to a vertical lifting bascule bridge. Background Art

[0002] In bridge engineering, in some special cases, it is very suitable to use a bridge that can be opened - a bascule bridge. The bascule bridge with a vertical opening method is a commonly used opening method for bascule bridges because of its simple force and convenient operation. Its lifting can be achieved by setting a balancing counterweight, which greatly reduces the power requirements and energy consumption for opening and closing during the operation period. For example, the bascule bridge of Panyu Guangming Bridge in Guangzhou uses a vertical lifting bascule bridge with a counterweight. When large ships need to pass, the bridge's opening span needs to be lifted vertically to a certain height to meet the clearance requirements for large ships. When large ships cannot pass and land transportation is required, the bridge needs to be lowered to the lowest position to connect the land transportation on both sides.

[0003] The above Guangming Bridge has a total length of 53.6m and a total width of 24.0m. It has two-way four-lane and sidewalks in the transverse direction. The total weight of the opening span is 730 tons. The counterweight is 97% of the total weight of the opening span, i.e. 730×97%=708.1 tons. Steel (iron) blocks are used as counterweights and hidden in four separate lifting towers at the four corners of the opening span. The required navigation width of the opening span of the bridge is 46m. However, if the opening span of similar bridges needs to be increased according to the increase in navigation width, the lifting weight will also increase. If the opening span is increased to 100m, according to the above bridge deck width and reference related weight indicators, it is estimated that the lifting weight of the opening span with a span of 100m will reach about: 730×(100 / 53.6)×1.5 (considering the increase in the amount of structural materials used in the opening span caused by the increase in the bridge span) = 2043 tons. If 97% of the balancing weight is also configured, the weight of the balancing weight is 2043×97%=1981.7 tons. The balancing weight is also made of steel (iron), and the volume of the balancing weight is 1981.7 / 7.85=252.5 cubic meters. The volume distributed in the four towers is 63.1 cubic meters respectively. Therefore, with the increase of the opening span, the balancing weight configured not only has a large amount of material consumption and high engineering costs, but also has difficulty in arranging in the lifting tower due to the significant increase in volume. Therefore, it is necessary to find a new lifting arrangement system to expand the applicable span of the vertical lifting bascule bridge. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a new energy-saving self-balancing vertical opening bridge with a simple structure, which makes full use of the weight of the side span structure adjacent to the vertical opening span and the internal space of the structure to balance the weight, can reduce material costs, reduce the power requirements and energy consumption for opening and closing operations, is easy to arrange the lifting system, and can adapt to larger spans.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions: a new type of energy-saving self-balancing vertical opening bridge, including an opening span, a lifting tower, a load-bearing sling and a driving drum, the opening span is located between the lifting towers, the driving drum is installed in the lifting tower, the load-bearing sling is wound around the driving drum, and the opening span is connected to the load-bearing sling, characterized in that: a self-balancing side span is provided on the outer side of the lifting tower, the load-bearing sling is connected to one end of the self-balancing side span close to the lifting tower after passing around the driving drum, so that the end of the self-balancing side span forms a vertical movable end, and the other end of the self-balancing side span is hingedly connected to the fixed part to form a connection structure that can be rotated up and down, so that the vertical movable end of the self-balancing side span is adjacent to the opening span, and the vertical movable end of the self-balancing side span is rotated in the vertical direction to cooperate with the driving drum to lift the opening span; when the opening span is in a closed state, it is connected with the self-balancing side span to form a closed bridge structure.

[0006] Furthermore, it also includes a fixed approach bridge, which is led out from both banks toward the middle of the river channel, and is connected to the self-balancing side spans on both sides when the open span is closed, and then connected to the two banks through the fixed approach bridge.

[0007] Furthermore, the lifting tower is located between the open span and the self-balancing side span, and is supported by the main pier; a main pier crossbeam is provided on the main pier, and the self-balancing side span and the open span after closing are supported by the main pier crossbeam; a locking device is provided on the main pier crossbeam, and when the open span and the self-balancing side span are closed in place, the locking device locks the two.

[0008] Furthermore, a side bridge pier is arranged below the joint between the fixed approach bridge and the self-balancing side span, a side pier cross beam is arranged on the side bridge pier, the fixed approach bridge pillow is pressed on the side pier cross beam, and the self-balancing side span is hingedly fixed to the corresponding side pier cross beam through the side span rotation hinge to form a vertical movable end that can rotate up and down.

[0009] Furthermore, there are four lifting towers, which are located at the four corner points of the vertical opening span; a load-bearing beam is installed below the driving drum inside the lifting tower, and the driving drum is installed on the load-bearing beam; when the opening span is raised to the highest position, it is not higher than the position of the load-bearing beam and has space for movement.

[0010] Furthermore, the load-bearing sling is a high-strength load-bearing cable body that is uninterrupted throughout its length and is made of steel wire rope or steel strand, and the load-bearing sling is arranged in multiple pieces.

[0011] Furthermore, the self-balancing side span adopts a steel box girder structure, and a side span counterweight is arranged inside the end close to the lifting tower, so that the self-balancing side span forms a structure that is heavier at the end close to the lifting tower than at the end close to the fixed approach bridge, and has the advantages of high structural rigidity and ample space for counterweight installation.

[0012] Preferably, the open span adopts a steel truss bridge structure to obtain structural characteristics of greater rigidity and lighter weight.

[0013] Preferably, the driving drum is provided with grooves which limit the load-bearing slings to prevent the load-bearing slings from being displaced when multiple load-bearing slings are used. The entire driving drum is made of cast steel structure or steel components.

[0014] Furthermore, in addition to being connected to the motor, the driving drum is also provided with a brake locking device.

[0015] The present invention utilizes the structural deadweight of the rotatable self-balancing side span and arranges additional counterweights therein, so that the vertical gravity of the self-balancing side span on one side of the lifting tower can be roughly equal to the vertical gravity of one end of the opening span, thereby completely eliminating the arrangement of counterweights in the lifting tower, and further expanding the applicable span of the vertical lifting opening bridge while ensuring low energy consumption in the opening and closing operation. For example, it is necessary to consider using a balancing counterweight to balance the weight of 97% of the opening bridge. According to this system, a self-balancing side span with a span of 60m is used with a small amount of counterweights in the box, and the span of the vertical lifting opening span that can be opened in the middle can be increased to 100m, and the safety and economy of the bridge structure system can be guaranteed, and the energy consumption of the opening and closing operation can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the closed traffic state of the vertical lifting bascule bridge of the present invention;

[0017] Figure 2 This is a schematic diagram of the helicopter-type opening bridge of the present invention in the open navigation state;

[0018] Figure 3 It is a schematic diagram of the working principle of the lifting system of the present invention.

[0019] In the figure, 1 is an open span, 2 is a self-balancing side span, 3 is a fixed approach bridge, 4 is a side span counterweight, 5 is a lifting tower, 6 is a load-bearing beam, 7 is a driving drum, 8 is a load-bearing suspension cable, 9 is a side pier beam, 10 is a side bridge pier, 11 is a main pier beam, 12 is a main pier, and 13 is a side span rotation hinge. DETAILED DESCRIPTION

[0020] The present invention will be further described below by means of specific embodiments in conjunction with the accompanying drawings:

[0021] In this embodiment, refer to Figure 1-Figure 3The new energy-saving self-balancing vertical opening bridge includes an opening span 1, a lifting tower 5, a load-bearing sling 8 and a driving drum 7. The opening span 1 is located between the lifting towers 5, the driving drum 7 is installed in the lifting tower 5, the load-bearing sling 8 is wound around the driving drum 7, and the opening span 1 is connected to the load-bearing sling 8; a self-balancing side span 2 is provided on the outer side of the lifting tower 5, and the load-bearing sling 8 is connected to one end of the self-balancing side span 2 close to the lifting tower 5 after passing around the driving drum 7, so that the end of the self-balancing side span 2 forms a vertical movable end, and the other end of the self-balancing side span 2 is hingedly connected to the fixed part to form a connection structure that can be rotated up and down, so that the vertical movable end of the self-balancing side span 2 is adjacent to the opening span 1; when the opening span 1 is in a closed state, it is connected with the self-balancing side span 2 to form a closed bridge structure, and land traffic can be carried out at this time.

[0022] It also includes a fixed approach bridge 3, which is led out from both banks toward the middle of the river channel. When the open span 1 is closed, it is connected to the self-balancing side spans 2 on both sides, and then connected to the two banks through the fixed approach bridge 3.

[0023] The lifting tower 5 is located between the open span 1 and the self-balancing side span 2, and is supported by the main pier 12; a main pier crossbeam 11 is provided on the main pier 12, and the self-balancing side span 2 and the open span 1 after closing are supported by the main pier crossbeam 11; a locking device is provided on the main pier crossbeam 11, and when the open span 1 and the self-balancing side span 2 are closed in place, the locking device locks the two.

[0024] A side bridge pier 10 is arranged below the joint between the fixed approach bridge 3 and the self-balancing side span 2, and a side pier cross beam 9 is arranged on the side bridge pier 10. The fixed approach bridge 3 is pressed on the side pier cross beam 9, and the self-balancing side span 2 is hinged and fixed to the corresponding side pier cross beam 9 through the side span rotation hinge 13 to form a vertical movable end that can rotate up and down.

[0025] There are four lifting towers 5, which are located at the four corner points of the vertical opening span 1; the load-bearing beam 6 is installed below the driving drum 7 inside the lifting tower 5, and the driving drum 7 is installed on the load-bearing beam 6; when the opening span 1 is raised to the highest position, it is not higher than the position of the load-bearing beam 6 and has ample space for activities.

[0026] The load-bearing sling 8 is a high-strength load-bearing cable body that is uninterrupted throughout the entire length and is made of steel wire rope or steel strand. The load-bearing sling 8 is arranged in multiple pieces, such as 10 to 20 pieces.

[0027] The self-balancing side span 2 adopts a steel box girder structure, and a side span counterweight 4 is arranged inside the end thereof close to the lifting tower 5, so that the self-balancing side span 2 forms a structure that is heavier at the end close to the lifting tower 5 than at the end close to the fixed approach bridge 3, which is more conducive to lifting the open span 1. At the same time, it also has the advantages of high structural rigidity and abundant counterweight installation space.

[0028] The opening span 1 adopts a steel truss bridge structure to obtain structural characteristics of greater rigidity and lighter weight.

[0029] The driving drum 7 is provided with a groove which serves as a limit for the load-bearing slings 8 to prevent the load-bearing slings 8 from being displaced when multiple load-bearing slings 8 are used. The entire driving drum 7 is made of a cast steel structure or a steel component.

[0030] The driving drum 7 is not only connected to the motor, but also provided with a brake locking device.

[0031] When it is necessary to pass a ship, the locking device is first unlocked, and the open span 1 is first lifted upward under the action of the driving drum 7. At the same time, the vertical movable end of the self-balancing side span 2 begins to descend under the gravity of itself and the side span counterweight 4, pulling the lifting of the open span 1 until the open span 1 is lifted to the set position and then stops and is locked. When it is necessary to close the open span 1, the vertical movable end of the self-balancing side span 2 is lifted upward under the action of the driving drum 7 and the cooperation of the open span 1's own weight, and at the same time, the open span 1 descends until it returns to its original position, and the locking device locks the open span 1 and the self-balancing side span 2.

[0032] Now, we take a bascule bridge with an opening span of 100m and a bridge deck width of 24m as an example, and refer to the relevant data of the Panyu Guangming Bridge, a vertical bascule bridge that has been completed and opened to traffic, for deduction. The data are as follows:

[0033] If the bridge body parameters are the same as those of Guangming Bridge, it is estimated that the lifting weight will reach about: 730×(100 / 53.6)×1.5 (considering the increase in the amount of structural materials for the opening span caused by the increase in the bridge span) = 2043 tons. If the balance weight needs to balance 97% of the weight of the opening span, according to the traditional lifting weight method similar to Guangming Bridge, the weight of the balance weight is 2043×97%=1981.7 tons. The counterweight is made of steel (iron), and the volume of the counterweight is 1981.7 / 7.85=252.5 cubic meters. The volume distributed in each place of the four lifting towers is 63.1 cubic meters respectively, which is very difficult to arrange. If the technical solution provided by the present invention is used, the basic data is calculated as follows:

[0034] 1. Since the weight to be lifted for the open span 1 is 2043 tons, and lifting towers 5 are arranged at the four corners of the open span 1, the weight P1 to be lifted for each lifting point is 2043 / 4=510.8 tons. It is assumed that 97% of the weight to be lifted for the open span 1 needs to be balanced, and the tension of the load-bearing sling 8 connected to the self-balancing side span 2 on the other side of the driving drum 7 in each lifting tower 5 is P2=97%×P1=97%×510.8=495.5 tons;

[0035] 2. The 3% unbalanced force between P2 and P1 is provided by the driving drum 7 under the control of the motor;

[0036] 3. The self-balancing side span 2 with a span of 60m adopts a steel box girder (beam height 2.5m). The dead weight of the steel structure is calculated as 0.5 tons / square meter of bridge deck. The weight of the bridge deck pavement and guardrail is calculated based on the average 0.25m thick concrete, which means the weight is 0.62 tons / square meter of bridge deck. The total dead weight of the structure at one end of the self-balancing side span 2 is: (0.5+0.62)×60×24 / 2=806.4 tons. In order to balance the force, a counterweight of 495.5×2-806.4=184.6 tons is required in the self-balancing side span 2.

[0037] 4. Concrete counterweight is used in the self-balancing side span 2, and the counterweight volume is 184.6 / 2.5=73.8m 3 , according to the concrete filling height of 2.4m in the distribution box and the horizontal concrete filling length of 20m on one side, the length of the side span counterweight 4 concrete filled at one end of the self-balancing side span 2 close to the lifting tower 5 is approximately: 73.8 / (2.4×20)=1.53m.

[0038] 5. Combining the above data analysis, it can be clearly seen that through the technical solution of the present invention, by utilizing the structural deadweight of the self-balancing side span 2 and a small amount of low-cost concrete inside the self-balancing side span 2, the lifting weight of the vertical opening span 1 of the bridge can be increased by more than 3 times, the bridge span can be increased to 100m, and the arrangement of counterweights in the lifting tower 5 can be completely eliminated to make the lifting tower arrangement more compact. Therefore, while ensuring the energy-saving operation of the vertical opening span 1, the span of the vertical opening bridge is also expanded.

[0039] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present application. That is, all equivalent changes and modifications made within the scope of the present application should still fall within the scope of the present invention.

Claims

1. A new type of energy-saving self-balancing vertical lifting bridge, including an opening span, a lifting tower, a load-bearing sling and a driving drum, the opening span is located between the lifting towers, the driving drum is installed in the lifting tower, the load-bearing sling is wound around the driving drum, and the opening span is connected to the load-bearing sling, characterized in that: A self-balancing side span is provided on the outer side of the lifting tower. The load-bearing sling passes around the driving drum and is connected to one end of the self-balancing side span close to the lifting tower, so that the end of the self-balancing side span forms a vertical movable end. The other end of the self-balancing side span is hingedly connected to the fixed part to form a connecting structure that can rotate up and down, so that the vertical movable end of the self-balancing side span is adjacent to the open span, and the vertical movable end of the self-balancing side span is rotated in the vertical direction to cooperate with the driving drum to lift the open span; when the open span is in a closed state, it is connected to the self-balancing side span to form a closed bridge structure; the self-balancing side span adopts a steel box girder structure, and a side span counterweight is arranged inside the end close to the lifting tower, so that the self-balancing side span forms a structure that is heavier at the end close to the lifting tower than at the end close to the fixed approach bridge.

2. The new energy-saving self-balancing vertical lifting bridge according to claim 1 is characterized by: It also includes a fixed approach bridge, which leads out from both banks toward the middle of the river channel. When the open span is closed, it is connected to the self-balancing side spans on both sides, and then connected to the two banks through the fixed approach bridge.

3. The new energy-saving self-balancing vertical opening bridge according to claim 2 is characterized by: The lifting tower is located between the open span and the self-balancing side span, and is supported by the main pier; a main pier crossbeam is provided on the main pier, and the self-balancing side span and the open span after closing are supported by the main pier crossbeam; a locking device is provided on the main pier crossbeam, and when the open span and the self-balancing side span are closed in place, the locking device locks the two.

4. The new energy-saving self-balancing vertical opening bridge according to claim 2 is characterized by: A side bridge pier is arranged below the joint between the fixed approach bridge and the self-balancing side span, a side pier cross beam is arranged on the side bridge pier, the fixed approach bridge pillow is pressed on the side pier cross beam, and the self-balancing side span is hingedly fixed to the corresponding side pier cross beam through the side span rotation hinge to form a vertical movable end that can rotate up and down.

5. The new energy-saving self-balancing vertical lifting bridge according to claim 1 is characterized by: There are four lifting towers in total, which are located at the four corner points of the vertical opening span; the load-bearing beam is installed below the driving drum inside the lifting tower, and the driving drum is installed on the load-bearing beam; when the opening span is raised to the highest position, it is not higher than the position of the load-bearing beam and has space for movement.

6. The new energy-saving self-balancing vertical lifting bridge according to claim 1 is characterized by: The load-bearing sling is a high-strength load-bearing cable body that is uninterrupted throughout its length and is made of steel wire rope or steel strand. The load-bearing sling is arranged in multiple pieces.

7. The new energy-saving self-balancing vertical lifting bridge according to claim 1 is characterized by: The open span adopts a steel truss bridge structure.

8. The new energy-saving self-balancing vertical lifting bridge according to claim 1 is characterized by: The driving drum is provided with a groove which plays a role in limiting the load-bearing sling, and the entire driving drum is made of a cast steel structure or a steel component.

9. The new energy-saving self-balancing vertical lifting bridge according to claim 1 is characterized by: The driving drum is connected with a motor and is provided with a brake locking device.

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