¡¡¡¡Products ¡¡¡·¡· ¡¡DTP Pot Bearing
 
1.Principle
¡¡ ¡¡DTP- Pot Bearings are connection devices, which keep the loads between the superstructure and the substructure transferring
¡¡ ¡¡under control. They can accommodate rotations at any axis and the appropriate movements of the bridge.
2.Structures
¡¡£® pot plate: It ensures the controlled deformation of the elastomeric disc.
¡¡£® elastomeric disc: Mainly made of rubber, under high pressure, which can rotate flexibly, like fluid, which ensures the rotations of the
¡¡¡¡ structures it connected.
¡¡£® sealing ring: It seals the elastomeric disc, protecting the elastomeric disc from fatigue cracking.
¡¡£® piston plate: It supplies a higher capacity of loading-transfer, and ensures the rotation of the bearing itself.
¡¡£® PTFE plate and the SS cover plate: The friction coefficient of these two parts remains at a low level, which accommodate longitudinal
¡¡¡¡and transverse sliding movements of the superstructures.
¡¡£® top plate: It helps to keep the flatness of SS cover flat and plays a supporting role.
3.Application and advantage
¡¡¡¡¡¡DTP bearings are mainly used in long-span bridges for large rotations, medium to large loads and concrete pressure.
¡¡¡¡¡¡DTP bearings are convenient to manufacture and install, due to their simple, compact structures.
4.Types
¡¡¡¡¡¡According to JT/T391-2009 and EN1337, DTP Bearings are classified into:
¡¡£®¡¡DTPF¡ª¡ªfixed bearing, no movements are allowed, while resisting horizontal forces in all directions and axis.
¡¡¡¡¡¡1-top plate£»2-brass seal£»3-elastomer disc£»4-piston£»5-anchor bolt£»6-sleeve£»7-washer£»8-dustproof ring
¡¡¡¡£®DTPS¡ª¡ªguided sliding bearing, only sliding movements along one restricted horizontal axis are allowed, and resisting
¡¡¡¡¡¡vertical forces in the perpendicular direction.
¡¡¡¡¡¡1-top plate1£»2-stainless steel plate£»3-PFTE£»4-piston£»5-sleeve£»6-washer£»7-anchor bolt£»8-pot(basin)£»9-elastomer disc£»
¡¡¡¡¡¡10-brass seal£»11-dustproof ring£»12-SF-1bronze backing sliding strip£»13-stainless steel plate (side)
¡¡¡¡¡¡£®DTPM ¡ª¡ªfree sliding bearing, movements along all horizontal axis are allowed, but afford no resisting to horizontal forces.
¡¡¡¡¡¡1-top plate1£»2-stainless steel plate£»3-PFTE£»4-piston£»5-sleeve£»6-washer£»7-anchor bolt£»8-pot(basin)£»9-elastomer disc£»
¡¡¡¡¡¡10-brass seal£»11-dustproof ring
5. Raw Materials
¡¡¡¡£®The pot and the piston are manufactured from ferrous materials in accordance with the EN standard or the AASHTO standard.
¡¡¡¡£®The elastomer material used for the elastomeric pad shall be natural rubber (NR) or the synthetic chloroprene rubber(CR).
¡¡¡¡£®The PTFE plate should be manufactured from certified PTFE with grease dimples, in which should be certified silicone.
¡¡¡¡£®The sealing ring shall be brass.
¡¡¡¡£®The material used for stainless steel plate should be as good as grade 1.4401 or grade 1.4311.
6.Fixing devices
¡¡¡¡In order to connect the superstructure and substructure, the fixing devices can¡¯t be ignored, such as anchor dowels, threaded
¡¡¡¡sockets,and anchor plates with shear studs. Generally speaking, anchor dowels are used for guided bearings and fixed bearings,
¡¡¡¡while the threaded sockets for the free-sliding bearings without anchor plates.
7.Sealing
¡¡¡¡¡¡The most important parts of the DTP bearings are the elastomeric discs. In order to ensure the elastomeric discs work properly
¡¡¡¡¡¡and reliably, the sealing rings are necessary. Generally, the sealing rings are made of brass, which can both fix the elastomeric
¡¡¡¡¡¡ discs and adapt to any deformations.

Diameter d /mm

Minimum cross-section /mm

Slits

Number of rings

¡Ü330

6¡Á1.5

Not permitted

2

£¾330£»£¼715

10¡Á1.5

Not permitted

2

¡Ý715£»£¼1500

10¡Á1.5

Not permitted

3

£¼1500

10¡Á2

7mm¡Á0.5mm
5mm spacing

3

Allowable solid brass sealing ring configuration
8. Properties (special requests from customer need available for design)
9. Certification
¡¡¡¡¡¡All DTP bearings are manufactured and designed in accordance with ¡°EN1337 2004, BS5400 or AASHTO LRFD bridge
¡¡¡¡¡¡construction specifications¡±.
¡¡¡¡¡¡With ¡°CE¡± mark on every single DTP bearing, it proves that the bearings satisfy all necessary requirements.¡¡
10. Inquiry
¡¡¡¡¡¡Quotations are welcomed with the following information:
¡¡¡¡£®the vertical loads, including the maximum, permanent and the minimum, and the corresponding horizontal loads.
¡¡¡¡£®maximum horizontal loads in the longitudinal and the transverse direction, and the related vertical loads.
¡¡¡¡£®rotations in the longitudinal and transverse directions.
¡¡¡¡£®the corresponding working drawing.
 
 
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