CN205821991U - A kind of lead-rubber butterfly spring group Combined-type shock-absorption bearing - Google Patents

Abstract

A lead-rubber-disc spring group combined shock-absorbing bearing, which is an important load-bearing and functional component widely used in high-rise buildings, bridges, tunnels, subways, high-speed rails, and intercity city viaducts. Its structure is to install a disc-shaped spring group on the base. The spring group is equipped with a short guide rod. The rubber cover is divided into two layers, the inner and outer layers. The tubular lead core is embedded in the two-layer rubber cover, and the whole is placed in the center of the shock absorber base. In the cylindrical structure, the disc spring group is placed in the inner layer of the rubber sheath, the shock isolation unit is placed on the upper part of the cylindrical structure of the base, and the 4 outer positioning movable pins are connected to the upper end cover and the base, and the 4 outer positioning movable pins are guaranteed during installation. Inserted into the holes of four rubber guide blocks, the support introduces a new design idea, using three kinds of shock absorption units of lead core, rubber and butterfly spring group to achieve a comprehensive shock absorption effect. In terms of structure, the production and maintenance costs of the support Low and able to control the vertical height will bring huge economic and social benefits to the society.

Description

A lead-rubber-butterfly spring group combined shock-absorbing support

technical field

The invention relates to a combined shock-absorbing support, which is an important load-bearing and functional component widely used in high-rise buildings, bridges, tunnels, subways, high-speed rails, intercity viaducts and other projects.

Background technique

In the next 20 years or even a longer period of time, my country's urban public transportation and other infrastructure construction will continue to maintain a trend of rapid development, and urban viaducts, intercity railways, and high-speed railways will become an outstanding embodiment of the country's comprehensive economic strength and modernization. Therefore, the demand for shock-absorbing and isolating devices in the construction industry will continue to increase, and the requirements for the technical and economic performance of shock-absorbing and isolating devices will also continue to increase. At present, there are four kinds of shock-absorbing and isolating devices most commonly used at home and abroad: elastic-plastic damping devices, hydraulic damping devices, pendulum-type shock-isolating bearings and rubber shock-isolating supports.

The elastic-plastic damping device is a shock-absorbing product with strong energy-dissipating capacity. The product features high damping ratio, strong energy-dissipating capacity, and obvious shock-absorbing effect. But it is difficult to control in vertical height.

The hydraulic damping device is a shock-absorbing product with strong energy consumption capacity. The hydraulic damping device is very convenient for the reinforcement of existing projects. It does not need to add other structures and does not affect the original structural design; It can be transformed into fixed piers in real time to share the earthquake force and effectively use the existing piers for earthquake resistance, which has high economic efficiency, but its production and maintenance costs are relatively high.

The pendulum type seismic isolation bearing belongs to the seismic isolation product, which can play a very good seismic isolation effect. At the same time, different friction coefficients can be selected according to the needs for different energy dissipation capabilities. It is suitable for any bridge or building in a high earthquake area. It is very economical, low maintenance cost, and can provide large displacement at the same time, but such a support is not suitable for workplaces that require corners.

Rubber shock-isolation bearings are shock-isolation products that can achieve a certain degree of shock-isolation effect. Rubber shock-isolation bearings have been widely used at home and abroad, and have now formed national standards. It is not suitable for bridges or buildings on soft ground, and the quality of the product is closely related to the performance of the rubber, so the quality of the rubber must be strictly controlled, and the rubber has aging problems. The seismic isolation device is suitable for I and II sites, and has certain limitations for soft soil III and IV sites.

To sum up, the current defects of bearings at home and abroad include high production and maintenance costs, and it is difficult to control the vertical height of the bearings; Ineffective, it has certain limitations for soft soil.

Contents of the invention

Purpose of the invention: the purpose of the present invention is based on the high cost of production and maintenance in the prior art, and the vertical height of the support is difficult to control; the corrosion resistance and aging resistance of the support material are not enough, and the support is not stable during the building life. Internal failure, and certain limitations for soft soil, a lead-rubber-belleville spring combined shock-absorbing bearing is proposed.

Technical solutions:

A lead core-rubber-butterfly spring group combined shock-absorbing support, characterized in that: a double-layer rubber sheath is installed in the cylindrical structure in the center of the base of the shock-absorbing support; the double-layer rubber A tubular lead core is embedded between the two layers of the cover; a disc spring group is installed in the inner layer of the double-layer rubber cover; a short guide rod is arranged in the center hole of the disc spring group; the ring-shaped shock absorber The unit is placed on the upper part of the cylindrical structure of the base; the upper end cover is covered above the shock-absorbing unit and fixed with the base.

The lead core-rubber-butterfly spring group combined shock-absorbing bearing is characterized in that: the upper end cover is connected to the base through four outer positioning movable pins.

The lead core-rubber-belleville spring group combined shock absorber is characterized in that the outer positioning movable pin is connected with the pin hole on the base after passing through the hole of the rubber guide block.

The lead core-rubber-belleville spring group combined shock absorber is characterized in that: the rubber guide block is placed in the groove on the top of the pin hole on the base; the inner part of the rubber guide block The size of the hole matches the outer diameter of the long rod part of the outer positioning movable pin.

The characteristic of the lead core-rubber-belleville spring group combined shock-absorbing support is that the inside of the cylindrical structure of the base is in the shape of a truncated cone with a narrow bottom and a wide top.

The lead core-rubber-disc spring group combined shock absorber is characterized in that: the short guide rod has a shape with a narrow top and a wide bottom, and its maximum circle size is smaller than the inner circle of the disc spring group basic size.

Advantages and effects: the present invention has good rigidity and anti-stability; it can control the vertical height; it can adapt to various soil structures; it can reserve enough effective displacement to meet the deformation requirements under rare earthquakes; It needs to be repaired and is easy to maintain; it is very economical and the maintenance cost is low; the material of the vibration-reducing and isolating support is corrosion-resistant.

Description of drawings:

Fig. 1 is the appearance schematic diagram of the present invention;

Fig. 2 is a schematic cross-sectional view of the structure of the present invention;

Fig. 3 is the exploded view of structure of the present invention;

Markings in the figure: 1 disc spring group; 2 external positioning movable pin; 3 double-layer rubber sheath; 4 tubular lead core; 5 short guide rod; 6 upper end cover; 7 shock absorber unit; 8 base; 9 rubber guide block.

detailed description:

The invention is a lead-rubber-butterfly spring group combined shock-absorbing bearing, which adopts three kinds of shock-absorbing units of lead core, rubber and butterfly spring group to achieve a comprehensive shock-absorbing effect.

The structure of the present invention is shown in Fig. 2 and Fig. 3, disc spring group 1 is installed on the base 8, and short guide rod 5 is housed in the spring group 1, and the rubber sheath 3 is divided into inner and outer layers, and the tubular lead core 4 is embedded in two layers. In the rubber cover 3, the whole is placed in the central cylindrical structure of the shock absorber base 8, the disc spring group 1 is placed in the inner layer of the rubber cover 3, and the shock isolation unit 7 is placed on the upper part of the base 8 cylindrical structure. 4 outer positioning movable pins 2 are connected to the upper end cover 6 and the base 8, and the 4 outer positioning movable pins 2 are inserted into the four rubber guide blocks 9 holes during installation.

The seismic isolation unit 7 is a non-main load-bearing component, which adopts a superimposed structure of rubber and thin steel plates. After the shock absorber is installed on the bridge, the lower surface of the upper end cover 6 is combined with the seismic isolation unit 7 due to the self-weight of the bridge plate itself, preventing the vibration isolation unit from being damaged. 7 Failure due to excessive pressure during normal use of the shock absorber. There is a dimensional tolerance between the inner diameter of the upper end cover 6 and the inner diameter of the cylinder structure of the base 8; there is a size difference between the long rod part of the outer positioning movable pin 2 and the pin hole size of the base 8. This structure gives the shock absorber upper end cover 6 degrees of freedom in the horizontal direction , so that the function of the seismic isolation unit 7 to absorb lateral vibrations can be brought into play when the bridge is affected by seismic shear waves. At the same time, grooves are divided in the four pin holes of the base 8, and four rubber guide blocks 9 are placed in the grooves, and the size of the inner hole is equal to the outer diameter of the long rod part of the outer positioning movable pin, thereby ensuring the accuracy of assembly and relative stability of the structure.

The inside of the cylindrical part of the base 8 is designed in the shape of a slightly narrower lower part and a slightly wider upper part. Stress concentrations occur at the ends of the structure.

Both the lead core 4 and the short guide rod 5 are cast by centrifugal casting method, and the lead core should meet the shape and dimensional accuracy requirements; the short guide rod 5 needs to ensure a shape slightly narrower at the top and slightly wider at the bottom, and the maximum circle size must not reach the inner circle of the disc spring Basic size, no precision requirement.

Disc spring group 1 is the main shock-absorbing unit, and the solid disc springs used have good rigidity. The rubber sheath 6 is embedded in the lead core 4, and the lead core 4 can improve the stability of the elastic system, but the lead material is soft and will not affect the shock-absorbing effect. The disc spring group 1 is combined with the rubber sheath 6 embedded in the lead core 1, which not only improves the stability of the shock absorber, but also retains the good shock absorption performance of the shock absorber, so that the bridge is more stable and the maintenance cost is reduced.

In the process of specific implementation and use, it can be concluded that the present invention has good rigidity and stability; it can control the height of the vertical value; it can adapt to various soil structures; it can reserve enough effective displacement to meet the deformation requirements under rare earthquakes ;The structure is simple, no repair is required, and the maintenance is convenient; it is very economical and the maintenance cost is low; the material of the vibration-reducing and isolating support is corrosion-resistant. Therefore, this kind of shock-absorbing bearing can be used as a shock-absorbing device in shock-absorbing systems such as buildings and bridges. The use of shock-absorbing design will undoubtedly greatly improve the earthquake resistance of the building and ensure that the use of the building is maintained when a strong earthquake occurs. Function, will bring huge economic benefit and social effect to the society.

Claims (6)

1. A lead core-rubber-butterfly spring group combined shock-absorbing support, characterized in that: a double-layer rubber cover (3 ); a tubular lead core (4) is embedded between the two layers of the double-layer rubber sheath (3); a disc spring group (1) is installed in the inner layer of the double-layer rubber sheath (3); A short guide rod (5) is arranged in the center hole of the disc spring group (1); the ring-shaped shock-absorbing unit (7) is placed on the upper part of the cylindrical structure of the base (8); the upper end cover (6) The cover is above the shock-absorbing unit (7) and fixed with the base (8). 2. The lead core-rubber-butterfly spring group combined shock absorber according to claim 1, characterized in that: the upper end cover (6) connects with the base (8) through four outer positioning movable pins (2) )connect. 3. The lead core-rubber-butterfly spring group combined shock absorber according to claim 2, characterized in that: after the outer positioning movable pin (2) passes through the hole of the rubber guide block (9), Connect with the pin hole on the base (8). 4. The lead core-rubber-belleville spring group combined shock absorber according to claim 3, characterized in that: the rubber guide block (9) is placed on the top of the pin hole on the base (8) In the groove; the size of the inner hole of the rubber guide block (9) matches the outer diameter of the long rod part of the outer positioning movable pin (2). 5. The lead core-rubber-belleville spring group combined shock absorber according to claim 1, characterized in that: the inside of the cylindrical structure of the base (8) is in the shape of a conical cone with a narrow bottom and a wide top . 6. The lead core-rubber-belleville spring group combined shock absorber according to claim 1, characterized in that: the short guide rod (5) has a narrow top and a wide bottom, and its maximum circle size is less than The basic dimensions of the inner circle of the disc spring group (1).