A damper device for a double-layer steel truss beam arch combined system bridge

Abstract

The present application relates to a kind of damper device of double-layer steel truss beam arch combination system bridge, comprising: oil cylinder, oil cylinder two ends are connected with end bridge body and suspender respectively, piston is slidably connected in oil cylinder, piston end towards suspender is rotatably connected with pull rod, pull rod extends out of oil cylinder and is fixedly connected with outer tube, outer tube is slidably sleeved on oil cylinder;Multiple flow-through holes are opened on piston, and flow-through hole is inclinedly penetrated through piston in ring direction.The beneficial effects of the present application are: piston is arranged in damping device, piston and pull rod are rotatably connected, and the kinetic energy of damping medium is converted into friction heat by setting inclined flow-through hole, and then the energy brought by vibration is consumed, to play the role of buffering and energy consumption;Several flow-through holes are arranged on piston, and part of flow-through hole is provided with elastic pad, by setting metal sheet with different bending strength, piston is provided with elastic pad that is opened correspondingly under different vibration, so that damper can automatically adjust energy consumption effect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of bridge engineering, and particularly relates to a damper device for a double-layer steel truss girder arch combined system bridge. BACKGROUND

[0002] The combined system bridge refers to a bridge formed by combining two independent structural systems, such as the combination of an arch and a beam, the combination of a beam and a truss, the combination of a suspension cable and a beam, etc. The girder arch combined system bridge refers to a bridge formed by combining an arch and a beam as two independent structural systems. In recent years, the double-layer steel truss girder arch combined system bridge has developed rapidly in China, and has been widely applied in the infrastructure construction in various places due to its reasonable stress, low cost, simple construction and beautiful appearance.

[0003] In the double-layer steel truss girder arch combined system bridge, the suspender is directly exposed to the harsh external environment and is always in a high stress state, so it is one of the most easily damaged components. The repeated vibration under the action of high stress is one of the important sources of fatigue damage of the suspender, and the large vibration of the suspender in the extremely harsh environment will also affect the bridge structure and the driving safety, so it is of great significance to take effective measures to control and reduce the vibration of the suspender for the safe service and the extension of the service life of the suspender. SUMMARY

[0004] The present application aims to overcome the deficiencies in the prior art, and provides a damper device for a double-layer steel truss girder arch combined system bridge.

[0005] The damper device for the double-layer steel truss girder arch combined system bridge comprises an oil cylinder, the two ends of the oil cylinder are connected with an end bridge body and a suspender respectively, a piston is slidably connected in the oil cylinder, a pull rod is rotatably connected to one end of the piston facing the suspender, the pull rod extends out of the oil cylinder and is fixedly connected with an outer cylinder, and the outer cylinder is slidably sleeved on the oil cylinder.

[0006] A plurality of flow-through holes are formed in the piston, the flow-through holes pass through the piston in a ring direction and are inclined, some of the flow-through holes are provided with elastic pads at one end facing the bridge body, metal sheets are embedded in the elastic pads, and one end of the elastic pad is fixed by a fixed pin.

[0007] The top end of the outer cylinder is rotatably connected with a mounting sleeve through a fixed plate, a clamping groove is formed in the inner wall of the mounting sleeve, the clamping groove is U-shaped, plate grooves are symmetrically arranged on the two side walls of the opening end of the clamping groove, when the pressing plate and the mounting sleeve are fixedly sleeved on the suspender, the two sides of the pressing plate are inserted into the plate grooves through the wing plates, and the plate grooves are threadedly connected with jacking bolts for extruding the pressing plate.

[0008] A gas cavity is arranged in the mounting sleeve, a movable plug is arranged in the gas cavity, the movable plug abuts against the pressing plate in the plate groove through a pressing rod, the gas cavity is connected with an air cushion, and the air cushion is arranged in the clamping groove.

[0009] As preferred, the moving grooves are symmetrically arranged on both sides of the pressing plate, the wing plates are slidably connected to the moving grooves, the moving grooves on both sides of the pressing plate are fixedly provided with the partition plates, the wing plates on one side of the partition plates are fixedly connected with the moving plates, the first springs are arranged between the moving plates and the partition plates, and the wing plates are retracted into the moving grooves when the first springs are compressed.

[0010] As preferred, the inner plates are slidably arranged in the plate grooves, the moving plugs in the air cavities are connected with the inner plates through the pressing rods, the second springs are arranged between the moving plugs and the inner walls of the air cavities, the air cavities are connected with the air cushions in the clamping grooves through the communication pipes, the wing plates on both sides of the pressing plate are inserted into the plate grooves, and one end of the jacking bolt in the plate groove is in abutment with the wing plate of the pressing plate.

[0011] As preferred, the moving plates are fixedly connected with the control plates for controlling the compression of the first springs, and the pressing plate is provided with the openings in communication with the moving grooves, and the control plates extend out of the openings.

[0012] As preferred, the flow-through holes provided with the elastic pads are divided into groups, and the metal sheets in the elastic pads arranged at the ends of the flow-through holes in different groups have different bending resistances.

[0013] As preferred, the side sealing plates are mounted on the end faces of the pistons facing the bridge surfaces through the mounting bolts, the opening grooves are arranged on the side sealing plates corresponding to the flow-through holes, the opening grooves and the orifices are in communication through the communication grooves, the elastic pads are arranged at the communication positions of the opening grooves and the communication grooves, and the fixing pins are fixed on the inner walls of the opening grooves.

[0014] As preferred, the pin heads are fixed at the bottom ends of the oil cylinders, the pin seats are rotatably connected with the pin heads, the pin seats are fixedly mounted on the bridge bodies, and the outer walls of the outer cylinders and the outer walls of the oil cylinders are connected through the spline and spline groove matching.

[0015] The method for using the damper device for the double-layer steel truss beam arch combined system bridge comprises the following steps:

[0016] Step one, the bottom end of the damper device is fixedly mounted on the bridge body through the pin seat; the suspender is clamped in the clamping groove of the fixed plate, and the pressing plate is mounted at the opening end of the clamping groove, so that the pressing plate and the mounting sleeve are fixedly sleeved on the suspender;

[0017] Step two, the jacking bolt is jacked into the plate groove, the wing plates on both sides of the pressing plate are fixed and further extruded, the pressing rod drives the moving plug to extrude the air in the air cavity, the air cushion is inflated, and the gap between the clamping groove and the suspender is filled; and the installation of the damper device is completed;

[0018] Step three, when the suspender shakes, the outer cylinder slides on the surface of the oil cylinder, drives the pull rod to move the piston to one side of the suspender, the elastic pad is automatically opened, the damping medium in the oil cylinder passes through the flow-through hole, and the piston rotates to consume energy;

[0019] Step four, after the shaking of the suspender is completed, the piston is reset.

[0020] Preferably, in step one, when installing the pressure plate, first squeeze the wing plate into the movable grooves on both sides of the pressure plate, move the pressure plate to the plate slot in the card slot, pop out the wing plate and insert it into the plate slot.

[0021] Preferably, in step three, when the boom shakes, the piston moves to one side of the boom, and corresponding to different shaking intensities, the elastic pads provided with metal sheets with different bending strengths are respectively in a raised or initial state; after the shaking ends, the piston moves to one side of the bridge body and resets, and the elastic pads are in their initial state and flat against the end of the flow hole.

[0022] The beneficial effects of the present invention are:

[0023] 1) The present invention connects the hanger and the bridge deck through a damping device. A piston is provided in the damping device. The piston and the pull rod are rotatably connected. The kinetic energy of the damping medium is converted into frictional heat by providing inclined flow holes, thereby consuming the energy caused by vibration and playing a role in buffering energy consumption.

[0024] 2) The present invention provides several flow holes on the piston, and elastic pads are provided in some of the flow holes. By providing metal sheets with different bending strengths, elastic pads are provided on the piston that open correspondingly under different vibrations, so that the damper can automatically adjust the energy dissipation effect.

[0025] 3) The present invention provides a mounting sleeve at the connecting end of the boom, and provides a retractable and pop-up wing plate on both sides of the pressure plate, and a dial plate is provided for controlling the wing plate to retract into the pressure plate, so as to facilitate the installation of the pressure plate into the mounting sleeve; and through the jacking bolt, not only the fixation between the mounting sleeve and the pressure plate is achieved, but also the movable plug is squeezed to make the air cushion squeeze the surface of the boom in the mounting sleeve, thereby improving the fixing effect of the mounting sleeve on the boom, and enabling the device to be used to fix booms of various sizes and shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure;

[0027] Figure 2 It is a cross-sectional view of the overall structure;

[0028] Figure 3 is a cross-sectional view of the piston;

[0029] Figure 4 is a cross-sectional view of the side sealing plate;

[0030] Figure 5 It is an enlarged view of the mounting sleeve and the pressure plate;

[0031] Figure 6 It is a cross-sectional view of the mounting sleeve and the pressure plate.

[0032] Explanation of the accompanying drawings: cylinder 1, piston 2, pull rod 3, outer tube 4, pin head 5, pin seat 6, fixed plate 7, mounting sleeve 8, circulation hole 9, side sealing plate 10, mounting bolt 11, opening groove 12, connecting groove 13, fixing pin 14, elastic pad 15, metal sheet 16, rotating shaft 17, slot 18, pressure plate 19, wing plate 20, plate slot 21, movable plate 22, partition 23, first spring 24, shift plate 25, nut 26, push bolt 27, inner plate 28, pressure rod 29, movable plug 30, second spring 31, air cushion 32, connecting pipe 33. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the following examples. The following examples are provided only to facilitate understanding of the present invention. It should be noted that, without departing from the principles of the present invention, it is possible for a person skilled in the art to make various modifications to the present invention, and such improvements and modifications fall within the scope of the claims of the present invention.

[0034] Example 1

[0035] As an example, Figures 1 to 6 As shown, this damper device for a double-layer steel truss beam-arch composite bridge includes: a cylinder 1 filled with a damping medium, the two ends of the cylinder 1 being connected to the end bridge body and the hanger respectively, a pin head 5 being fixed to the bottom end of the cylinder 1, the pin head 5 being rotatably connected to a pin seat 6, and the pin seat 6 being fixed to the bridge body by an expansion bolt.

[0036] like Figure 2 As shown, a piston 2 is slidably connected to the inside of the oil cylinder 1. The piston 2 is rotatably connected to a pull rod 3 toward one end of the boom. The pull rod 3 extends out of the oil cylinder 1 and is fixedly connected to an outer tube 4. The outer tube 4 is slidably sleeved on the oil cylinder 1. The inner wall of the outer tube 4 and the outer wall of the oil cylinder 1 are connected by a spline groove. The arrangement of the groove and spline can limit the rotation of the outer tube 4 on the oil cylinder 1, thereby limiting the rotation of the pull rod 3. Since the piston 2 is rotatably connected to the pull rod 3, the piston 2 can rotate freely. A seal is also provided inside the upper end of the oil cylinder 1 to maintain the sealing between the pull rod 3 and the oil cylinder 1.

[0037] A plurality of flow holes 9 are evenly arranged on the piston 2, and the flow holes 9 are circumferentially and obliquely passed through the piston 2. The flow holes 9 have a long length, so that when the damping medium passes through the flow holes 9, a large amount of kinetic energy can be converted into thermal energy of the damping medium and thus consumed; on the other hand, since the flow holes 9 are inclined, when the damping medium passes through the flow holes 9, it will drive the piston 2 to rotate, thereby, a part of the movement along the length direction can be converted into the rotation of the piston 2. Under the action of the friction between the rotation of the piston 2 and the damping medium, the kinetic energy of the rotation of the piston 5 is consumed, thereby converted into thermal energy of the damping medium, achieving the effect of energy consumption, and greatly improving the energy consumption efficiency and energy consumption effect.

[0038] As Figure 3 and Figure 4 shown, about a quarter of the flow hole 9 is provided with an elastic pad 15 towards the bridge end, specifically, the piston 2 is provided with a side sealing plate 10 on the end face towards the bridge surface through the installation bolt 11, the side sealing plate 10 is provided with an open slot 12 corresponding to the flow hole 9, the open slot 12 is connected with the hole through the communication slot 13, the elastic pad 15 is arranged at the communication between the open slot 12 and the communication slot 13, and one end of the elastic pad 15 is fixed on the inner wall of the open slot 12 through the fixed pin 14. Through the setting of the elastic pad 15, the flow hole 9 can play a one-way sealing role, and the flow hole 9 is opened when the boom is shaken and closed when it is restored to stability.

[0039] The metal sheet 16 is embedded in the elastic pad 15, and the flow hole 9 provided with the elastic pad 15 is divided into groups, and the metal sheets 16 in the elastic pads 15 provided at the ends of the flow holes 9 in different groups have different bending strengths. By replacing metal sheets with different bending strengths, the opening degree of the elastic pad 15 can be adjusted, and different elastic pads 15 are opened when the boom is shaken by different sizes, so as to achieve the effect of controlling the opening number of the flow hole 9, and then the damping strength can be automatically adjusted to automatically respond to different intensity shaking.

[0040] As Figure 1 , Figure 5 and Figure 6 shown, the top end of the outer cylinder 4 is provided with two fixed plates 7, and the rotating shaft 17 of the installation sleeve 8 is arranged between the two fixed plates 7. The inner wall of the installation sleeve 8 forms a clamping groove 18, which is U-shaped and used for clamping the boom. The two side walls of the open end of the clamping groove 18 are symmetrically provided with plate grooves 21, and the two sides of the pressing plate 19 are symmetrically provided with moving grooves. The moving grooves are slidably connected with wing plates 20, and the moving grooves between the two sides of the pressing plate 19 are fixedly provided with a partition plate 23. The wing plate 20 is fixedly connected with a moving plate 22 on the side facing the partition plate 23. The first spring 24 is arranged between the moving plate 22 and the partition plate 23. The moving plate 22 is fixedly connected with a push plate 25 for controlling the compression of the first spring 24. The back surface of the pressing plate 19 is provided with an opening communicating with the moving groove, and the push plate 25 extends out of the opening. The push plate 25 can push the moving plate 22 to move, and the wing plate 20 is retracted into the moving groove when the first spring 24 is compressed.

[0041] When the pressing plate 19 and the installation sleeve 8 are fixedly sleeved on the boom, the two sides of the pressing plate 19 are inserted into the plate grooves 21 through the wing plates 20. The wall of the plate groove 21 is fixedly provided with a nut 26, and the top-in bolt 27 for extruding the pressing plate 19 is threadedly connected with the inner wall of the nut 26. One end of the top-in bolt 27 is located outside the installation sleeve 8, and the other end extends into the plate groove 21.

[0042] Example two

[0043] As another embodiment, the second embodiment is based on the first embodiment and proposes a more specific damper device for a double-layer steel truss girder arch combined system bridge. Specifically, an air cushion 32 is arranged to fill the gap between the mounting sleeve 8 and the suspender.

[0044] As shown in Figure 6 , the mounting sleeve 8 is provided with an air cavity, and the air cavity is provided with a movable plug 30. The movable plug 30 is connected to the pressing plate 19 in the plate slot 21 through the pressing rod 29. The air cavity is connected with the air cushion 32, and the air cushion 32 is arranged in the clamping groove 18.

[0045] The inner plate 28 is slidably arranged in the plate slot 21, and the inner plate 28 is connected to the movable plug 30 in the air cavity through the pressing rod 29. The movable plug 30 and the inner wall of the air cavity are provided with a second spring 31. The air cavity is connected to the air cushion 32 in the clamping groove 18 through the communication pipe 33. The wing plates 20 on both sides of the pressing plate 19 are inserted into the plate slot 21, and one end of the jacking bolt 27 in the plate slot 21 is in contact with the wing plates 20 of the pressing plate 19.

[0046] It should be noted that the same or similar parts in this embodiment as in the first embodiment can be mutually referred to, and will not be described in detail in this application.

[0047] Embodiment three

[0048] As another embodiment, the third embodiment is based on the second embodiment and proposes a method for using the damper device for a double-layer steel truss girder arch combined system bridge. The installation method of the damper device includes the following steps:

[0049] Step one, the bottom end of the damper device is fixedly installed on the bridge body through the pin seat 6; the suspender is clamped in the clamping groove 18 of the fixed plate 7, and the two knobs 25 are moved by hand or machine, which can make the two wing plates 20 retract, the wing plates 20 are squeezed into the moving slot on both sides of the pressing plate 19, the pressing plate 19 is moved to the plate slot 21 in the clamping groove 18, after the knobs 25 are loosened, the wing plates 20 automatically pop out and are inserted into the plate slot 21, then the jacking bolt 27 is screwed in, and the position of the pressing plate 19 is fixed by the squeezing of the jacking bolt 27 on the wing plates 20, thereby effectively fixing the pressing plate 19 and the mounting sleeve 8 on the suspender. Through this installation method, it can also adapt to different thickness and diameter of the suspender, and has wider adaptability.

[0050] Step two, screw into the top bolt 27, the wing plate 20 fixed on both sides of the pressure plate 19, through the pressure plate 19 compression boom; then further screw into the top bolt 27, the wing plate 20 will also push the inner plate 28 moves, the inner plate 28 moves through the pressure plate 19 makes the compression rod 29 driven by the moving plug 30, extrusion of air in the air chamber, the air in the air chamber through the communication pipe 33 into the air cushion 32, make the air cushion 32 swell, through the swollen air cushion 32 fill the gap between the boom and the slot 18, improve the installation set 8 on the boom fixed effect, and adapt to various sizes and shape characteristics of the boom, prevent the installation set 8 on the boom slip.

[0051] Embodiment four

[0052] As another embodiment, this embodiment four is based on the embodiment three, proposes a more specific method for using the damper device of the double-layer steel truss beam arch combined system bridge, after installing the damper device, it also includes step three and step four.

[0053] Step three, when the boom shakes, the outer cylinder 4 slides on the surface of the oil cylinder 1, drives the pull rod 3 to move the piston 2 to the boom side, corresponding to different shaking intensity, the elastic pad 15 with different bending strength of the metal sheet 16 is respectively raised or in the initial state; The damping medium in the oil cylinder 1 passes through the flow-through hole 9, the piston 2 rotates and consumes energy, effectively controls and reduces the vibration of the boom.

[0054] Step four, after the boom shakes, the piston 2 moves to the bridge body side to reset, in this process, all the elastic pads 15 are in the initial state and are flat on the end of the flow-through hole 9, and the damping medium passes through the piston 2 through the flow-through hole 9 without the elastic pad 15.

[0055] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between each embodiment can be referred to each other.

Claims

1. A method for using a damper device for a double-layer steel truss beam-arch composite bridge, characterized in that: include: The oil cylinder (1) has two ends connected to the end bridge body and the suspension rod respectively; a piston (2) is slidably connected inside the oil cylinder (1); the piston (2) is rotatably connected to a pull rod (3) toward one end of the suspension rod; the pull rod (3) extends out of the oil cylinder (1) and is fixedly connected to an outer cylinder (4); the outer cylinder (4) is slidably sleeved on the oil cylinder (1); a pin head (5) is fixed to the bottom end of the oil cylinder (1); the pin head (5) is rotatably connected to a pin seat (6); the pin seat (6) is fixedly installed on the bridge body; the inner wall of the outer cylinder (4) and the outer wall of the oil cylinder (1) are connected by spline grooves; A plurality of flow holes (9) are provided on the piston (2), and the flow holes (9) pass through the piston (2) in an annular and oblique manner. Some of the flow holes (9) are provided with elastic pads (15) toward one end of the bridge body, and a metal sheet (16) is embedded in the elastic pad (15). One end of the elastic pad (15) is fixed by a fixing pin (14). The flow holes (9) provided with the elastic pads (15) are divided into groups, and the metal sheets (16) in the elastic pads (15) provided at the ends of the flow holes (9) in different groups have different bending strengths. The top end of the outer cylinder (4) is rotatably connected to a mounting sleeve (8) via a fixing plate (7). A clamping groove (18) is formed on the inner wall of the mounting sleeve (8). The clamping groove (18) is U-shaped, and plate grooves (21) are symmetrically provided on the wall surfaces on both sides of the opening end of the clamping groove (18). When the pressing plate (19) and the mounting sleeve (8) are fixedly sleeved on the suspension rod, the two sides of the pressing plate (19) are inserted into the plate grooves (21) via wing plates (20). The plate grooves (21) are threadedly connected to jacking bolts (27) for squeezing the pressing plate (19). An air cavity is provided in the mounting sleeve (8), a movable plug (30) is provided in the air cavity, the movable plug (30) abuts against the pressure plate (19) in the plate groove (21) through the pressure rod (29), the air cavity is connected to an air cushion (32), and the air cushion (32) is provided in the card groove (18); The method for using a damper device for a double-layer steel truss beam-arch composite bridge comprises the following steps: Step 1: The bottom end of the damper device is fixedly mounted on the bridge body through the pin seat (6); the suspension rod is clamped in the clamping groove (18) of the fixing plate (7), and the pressure plate (19) is installed at the open end of the clamping groove (18), so that the pressure plate (19) and the mounting sleeve (8) are fixedly sleeved on the suspension rod; Step 2: Push the jacking bolt (27) into the plate groove (21), fix the wing plates (20) on both sides of the pressure plate (19) and further squeeze them, so that the pressure rod (29) drives the moving plug (30) to squeeze the air in the air cavity, and the air cushion (32) expands to fill the gap between the card slot (18) and the suspension rod; and the installation of the damper device is completed; Step 3: When the boom shakes, the outer tube (4) slides on the surface of the oil cylinder (1), driving the pull rod (3) to move the piston (2) toward the side of the boom, the elastic pad (15) automatically opens, the damping medium in the oil cylinder (1) passes through the flow hole (9), and the piston (2) rotates to consume energy; Step 4: After the suspension rod shakes, the piston (2) is reset.

2. The method for using the damper device for a double-layer steel truss beam-arch composite bridge according to claim 1, characterized in that: The pressing plate (19) is symmetrically provided with movable grooves on both sides, and the movable grooves are slidably connected to the wing plates (20). A partition plate (23) is fixedly provided between the movable grooves on both sides of the pressing plate (19). A movable plate (22) is fixedly connected to the side of the wing plate (20) facing the partition plate (23). A first spring (24) is provided between the movable plate (22) and the partition plate (23). When the first spring (24) is compressed, the wing plate (20) retracts into the movable groove.

3. The method for using the damper device for a double-layer steel truss beam-arch composite bridge according to claim 1, characterized in that: An inner plate (28) is slidably provided in the plate groove (21), and the inner plate (28) is connected to a movable plug (30) in the air cavity through a pressure rod (29). A second spring (31) is provided between the movable plug (30) and the inner wall of the air cavity. The air cavity is connected to an air cushion (32) in the card groove (18) through a connecting pipe (33). The wing plates (20) on both sides of the pressure plate (19) are inserted into the plate groove (21), and one end of the jacking bolt (27) in the plate groove (21) contacts the wing plate (20) of the pressure plate (19).

4. The method for using the damper device for a double-layer steel truss beam-arch composite bridge according to claim 2, characterized in that: The movable plate (22) is fixedly connected with a dial plate (25) for controlling the compression of the first spring (24); an opening communicating with the movable groove is provided on the back of the pressure plate (19); and the dial plate (25) extends from the opening.

5. The method for using the damper device for a double-layer steel truss beam-arch composite bridge according to claim 1, characterized in that: A side sealing plate (10) is installed on the end surface of the piston (2) facing the bridge deck via a mounting bolt (11). An opening groove (12) is provided on the side sealing plate (10) corresponding to the flow hole (9). The opening groove (12) is connected to the orifice via a connecting groove (13). An elastic pad (15) is provided at the connection between the opening groove (12) and the connecting groove (13). A fixing pin (14) is fixed on the inner wall of the opening groove (12).

6. The method for using the damper device for a double-layer steel truss beam-arch composite bridge according to claim 1, characterized in that: In step 1, when installing the pressing plate (19), first squeeze the wing plate (20) into the movable grooves on both sides of the pressing plate (19), move the pressing plate (19) to the plate groove (21) in the card groove (18), and pop out the wing plate (20) and insert it into the plate groove (21).

7. The method for using the damper device for a double-layer steel truss beam-arch composite bridge according to claim 1, characterized in that: In step three, when the boom shakes, the piston (2) moves toward one side of the boom, and corresponding to different shaking intensities, the elastic pad (15) provided with metal sheets (16) with different bending strengths is respectively in a tilted or initial state; after the shaking ends, the piston (2) moves to the side of the bridge body and resets, and the elastic pad (15) is in its initial state and flatly attached to the end of the flow hole (9).

Images