CN103382703B - A kind of suspension bridge jackstay puts rope machine - Google Patents

Abstract

A main steel cable pay-off machine for a suspension bridge, comprising a torque motor 1, a hydraulic push rod brake 2, a reduction gear 3, a drive shaft 4, a support frame 8 for each mechanism of the rope pay-off machine, and a shaft extension 9 at the passive end, in which the cable disc 7 is set On the driving shaft 4 and the driven end shaft extension 9, the front end of the driven end shaft extension 9 is placed in the mandrel hole of the cable reel 7, and the rear end is provided with an operation panel for adjusting the driven end shaft extension; Comprising a braking device for stopping the rotation of the cable drum 7 . After the invention, the cable reel can be braked smoothly, reducing the damage to the reduction gear and the motor due to emergency stop, and greatly prolonging the mechanical life. The invention can brake smoothly, and also shortens the time for setting and changing the cable reel.

Description

A rope-laying machine for the main steel cable of a suspension bridge

technical field

The invention relates to a construction equipment for laying out the main steel cable of a suspension bridge for a large bridge, in particular to a rope-laying machine for the main steel cable of a suspension bridge.

Background technique

Suspension bridge, also known as suspension bridge, refers to a bridge whose main load-bearing member of the superstructure is the cable suspended by the tower and anchored on both banks (or at both ends of the bridge). The main load-bearing component of the suspension bridge is the suspension cable. The suspension cable is composed of many cable strands. Each strand is produced by the production factory and wound on the cable tray, and then transported to the construction site to be released and erected. It is suspended and anchored by the cable tower. On both sides of the strait, the cable erection process is also called rope laying. The erection of the cable strands of the suspension bridge is an important process of bridge construction. In the past, the rope laying method used brackets to support the cable tray, and the cable tray was loaded by first using a through shaft to penetrate the cable tray It is very inconvenient and takes a long time to hang it inside, and then hang it on the bracket. The bearing is free-rotating, and a lot of manual assistance is needed to release the rope. Finally, the reducer is used to drive the rope, but it does not solve the problem. The diameter changes from large to small, the moment of inertia of the cable reel, and the speed of unwinding the rope. It cannot be adjusted adaptively during the process of unwinding the rope, so there will be phenomena such as unfixed, over-release, disordered reel, loose reel, and loose wire. There is great damage to the strand wire, which is the main problem existing in the original construction technology and equipment, and it will never appear in the bridge construction process.

Chinese patent CN2740574Y discloses a device in which the main cable strands of a suspension bridge are released from a cable reel. The jacking mechanism is fixed on the central hole of the cable reel through a connector, and a damping mechanism and a torque motor are connected to the jacking mechanism. The damping mechanism is composed of a brake mechanism and a speed change mechanism, and the speed change mechanism is composed of a gear pair and a speed reducer. This kind of passive cable-laying device for the main cable strands of the suspension bridge construction overcomes to a certain extent the "hula hoop" in the process of erecting the cable strands in the construction of the traditional suspension bridge, which causes friction and extrusion between the strands and causes broken belts and loose wires. However, if the total weight of a cable reel reaches 40t~70t, it is required to stop midway, adjust the cable, or stop in an emergency during the cable laying process. Because the weight of a cable reel is relatively large, the moment of inertia is large, and Large, the damping mechanism and torque motor are not enough to brake the cable drum.

Contents of the invention

The invention provides a main steel cable rope releasing machine of a suspension bridge which can be assisted by a manual band brake to stop smoothly when the vehicle is parked halfway, the rope is unwound, or the vehicle needs to be parked in case of an accident.

The present invention is achieved like this:

A main cable pay-off machine for a suspension bridge, comprising a torque motor 1, a hydraulic push rod brake 2, a reduction gear 3, a drive shaft 4, a support frame 8 for each mechanism of the rope pay-off machine, and a shaft extension 9 at the passive end, in which 7 cable discs are placed On the drive shaft 4 and the driven end shaft extension 9, the feature is that the drive shaft 4 also includes a brake device for stopping the rotation of the cable reel 7.

The brake device includes a band brake disc 6 mounted on the drive shaft 4, the band brake disc 6 is connected via a torque pin 5; the brake band 11 is installed in the groove 10 of the band brake disc 6, wherein the brake band One end of 11 is fixed on the fixed pin shaft 15 of support, and the other end links to each other with lever hinge shaft 12, and the tightness of braking band is regulated by the lifting of operating screw mandrel 13.

Beneficial effect

1. For the large-tonnage rope-laying machine in the present invention, the total weight of the cable drum is 40t~70t, the moment of inertia is large, the inertia is large, and it is required to stop halfway, adjust the rope, or stop in case of an accident during the rope-laying process. The reduction gear And the torque motor is not enough to brake the cable reel, which will cause damage to the reduction gear and the motor, and the deceleration will reduce the life of the machine. After the invention, the cable reel can be braked smoothly, and the impact on the reduction gear due to emergency stop is reduced. And motor damage, greatly extending the mechanical life.

2. The present invention can brake smoothly, and also shortens the time for setting and changing the cable reel.

Description of drawings

Figure 1 shows the schematic diagram of the main cable pay-off machine of the suspension bridge

Figure 2 shows the schematic diagram of the brake device

Marked in the figure 1 torque motor 2 hydraulic push rod brake 3 reduction gear 4 drive shaft 5 torque pin 6 band brake disc

7 Cable reel 8 Support frame 9 Passive end shaft extension 10 Groove 11 Brake band 12 Lever hinge shaft

13 Operating screw rod 14 Operating platform 15 Fixed pin shaft.

detailed description

Below in conjunction with accompanying drawing for further explanation:

In Figure 1, 1 is the torque motor, which is used as the driving force and braking power of the rope unwinding machine; 2 is the hydraulic push rod brake as the stop brake; 3 is the reduction gear, which increases the transmission torque; 4 is the driving shaft, which is used as the cable reel and belt 5 is the torque pin, which acts as the rotation of the cable disc; 6 is the belt brake disc, the friction force of the friction belt generates the braking torque through the brake disc; 7 is the cable disc; 8 is the frame as the The support frame of each mechanism of the rope-laying machine; 9 is the passive end shaft extension of the telescopic adjustment, which is used as the support and loading and unloading adjustment of the cable drum; 10 is the groove of the band brake disc.

Among Fig. 2, 11 is a brake belt, which produces frictional pressure on the brake disc during tension; 6 is a belt brake disc, and the brake friction produces braking torque; 12 is a lever hinge shaft, and 13 is an operating screw rod, which Lifting is to the tightness of brake band; 14 is operating platform, and 15 is the fixed pin shaft of fixing brake band one end.

The typical operation process of the specific rope unwinding machine is as follows:

Install and adjust the rope laying machine to the normal working state → hoist the cable reel above the rope laying machine → rotate the operation panel at the rear end to adjust the adjustable passive end shaft extension 9, and adjust the adjustable passive end shaft extension 9 to Return the state, so that there is a gap of about 50mm between the cable reel and the shaft of the rope pay-off machine → put down the cable reel, and make the mandrel holes at both ends of the cable reel align with the driving shaft and movable shaft of the rope pay-off machine (the fixed shaft in Figure 1 4 and the shaft extension of the passive end 9) → install the torque pin (5 torque pin in Fig. The adjusted telescopic shaft is adjusted so that the cable reel is in a tight state → connect the cable head clamp on the cable reel with the puller on the traction rope of the traction mechanism, so that the rope unwinding machine is in the ready state for unwinding the rope (this clamping process only requires About 10 minutes, while the previous clamping process only took 70 minutes)→Start the traction mechanism to pull the cable bar to release the rope, adjust the torque limiter so that the rope release machine will give the cable drum a torque opposite to the direction of rotation, and maintain the line speed and reverse direction. Constant tension, stable rope release process→stop in the middle, end of rope release, or need to stop in case of accident, you can use manual belt brake to assist stable parking→end of rope release→repeat the above working process of the rope release machine.

A rope unwinding machine can unwind 6 coils of rope in 10 hours, while the traditional rope unwinding machine in the past can only unwind 3 coils of rope in 10 hours.

This shows that compared with the prior art, the rope-releasing machine of the present invention has a very significant beneficial effect of its implementation.

Claims (1)

1. suspension bridge jackstay puts a rope machine, including torque motor (1), hydraulic push-rod brake (2), reduction gearing (3), master Moving axis (4), the bearing support (8) of Fang Shengjige mechanism, Partner axle stretches (9), and operation dish, wherein rope dish (7) is placed in driving shaft (4) Stretching on (9) with Partner axle, the front end that described Partner axle stretches (9) is placed in the core axle hole of described rope dish (7), and its rear end is provided with Regulate the operation dish that described Partner axle is stretched；

It is characterized in that, described driving shaft (4) also includes one for stopping the brake gear that rope dish (7) rotates；Described stop Car device includes a belt brake disc (6) being arranged on driving shaft (4), and described belt brake disc (6) is through moment pin (5) Connecting strand dish (7)；Brake ribbon (11) is arranged in the groove (10) of belt brake disc (6), and wherein one end of brake ribbon (11) is solid Being scheduled on the fixed pin shaft (15) of support, the other end is connected with lever hinge (12), and described lever hinge (12) is by operation silk The degree of tightness of the lift adjustment brake ribbon (11) of bar (13).