CN201027610Y

CN201027610Y - Concrete pump conveying cylinder piston

Info

Publication number: CN201027610Y
Application number: CNU2007200790890U
Authority: CN
Inventors: 童述藩; 焦新法; 李世彬
Original assignee: TONG SHUFAN JIAO XINFA LI SHIBIN; TONG SHUFAN JIAO XINFA LI SHIB
Current assignee: TONG SHUFAN JIAO XINFA LI SHIBIN; TONG SHUFAN JIAO XINFA LI SHIB
Priority date: 2007-04-12
Filing date: 2007-04-12
Publication date: 2008-02-27
Anticipated expiration: 2017-04-12

Abstract

The utility model discloses a concrete pump conveying cylinder piston, wherein, the shape of the piston is identical to the prior piston; the lip of a polytetrafluoroethylene piston layer is provided with a metal spring; a metal member is arranged between the polytetrafluoroethylene piston layer and a rubber layer; meanwhile, the metal member has a piston hole matched with a piston rod. The utility model is not easy to deform and has ideal abrasion resistance.

Description

The concrete pump piston of conveying cylinder

Technical field

The utility model designs a kind of building machinery accessory, particularly a kind of concrete pump piston of conveying cylinder that build concrete is stirred and carries.

Background technique

Concrete against oil cylinder working-pressure, promotes to carry the piston in the cylinder in carrying cylinder, make the concrete in the cylinder produce pressure, (2.5～22Mpa) and with transmission and concrete transmission to pipeline, and deliver to the building place again and implement casting.Piston plays the effect of sealing and pressure transmission.Concrete enters to be carried cylinder to vacuumize by piston to enter, after the pressurization, again concrete is released defeated pipe from carrying in the cylinder, and this also will lean on piston pressure to release.In this mechanical action, when the concrete pump that build concrete stirred and carry, piston of conveying cylinder can meet with a large amount of stone sands wearing and tearing.Because piston is worked in carrying cylinder, with concrete contact pressure 2.5～22Mpa.Sandstone in the concrete is not only to carrying cylinder that wearing and tearing are arranged, and causes wearing and tearing to the soft rubber piston of material is easier.Piston in the sandstone of high pressure motion speed greatly about 0.5～1m/s.Under the effect of pressure, sandstone, speed, causing piston is the main cause of wearing and tearing.

General concrete pump piston is the sulfuration of rubber and metal and the piston made, rubber it wear-resistant poor in concrete sandstone, and the rubbed temperature coefficient that produced and carry the cylinder tightening force of the resilience of rubber causes piston distortion, aging.

Summary of the invention

The purpose of this utility model is to provide to the public that a kind of wear-resisting property is good, update method is simple, the concrete pump piston of conveying cylinder that service time is longer.

For achieving the above object, the technological scheme that the utility model adopted is: the one, will existing not wear-resisting relatively rubber-metal sulfuration piston, and use shape invariance, more wear-resisting teflon piston layer instead, promote a metal spring simultaneously at the lip place; Be metal construction between teflon piston layer and rubber layer, metal construction has piston hole, as shown in Figure 1.

In order to improve permanent deformation, a pre-buried tension force metal spring overcomes the elastic force deficiency in lip, make piston keep elastic force not to be subjected to the temperature effect of frictional heat and the influence of carrying the clamping force of cylinder, make concrete piston can keep good resilience for a long time, prolong the operating life of concrete piston in carrying cylinder.

Improve the wear-resisting property of piston rubber, to prolong the operating life of piston.Concrete grammar is to add plastics and rubber blending in rubber, thereby improves the wear-resisting property of rubber.Press HG4-1458-82 sandblast glue abrasion standard, its Akron abrasion loss standard is≤0.8cm ³/ 1.61km.Through and can reach Akron abrasion 0.04～0.11cc/1.61km with the rubber mill consumption of modification.Improve wear-resisting property, just can prolong the working life of piston.

Improve the resilience that improves piston rubber.Rubber, plastics all are macromolecular materials.Concrete piston can be made rubber produce permanent deformation by crowded (banding) in carrying cylinder for a long time.Reduce elasticity and can make the rubber concrete piston lose the performance that vacuumizes, piston is worn concrete piston can not be vacuumized, and can not vacuumize, and concrete just can not well enter the conveying cylinder, and then piston is scrapped.

Cause the reason of piston permanent deformation to also have piston to move the temperature coefficient of frictional heat, temperature is high more, and the time is long more, and permanent deformation is then fast more.

Description of drawings

Fig. 1 is the utility model structural representation.

Among the figure: 1, piston layer; 2, rubber layer; 3, metal construction; 4, metal spring; 5, piston hole.

Embodiment

Below in conjunction with accompanying drawing the utility model is explained in detail:

As shown in Figure 1, will existing not wear-resisting relatively rubber-metal sulfuration piston, use shape invariance, more wear-resisting teflon piston layer 1 instead, promote a metal spring 4 simultaneously at the lip place; It between teflon piston layer 1 and rubber layer metal construction 3; Metal construction 3 has the piston hole 5 that matches with piston rod.

Claims

1. concrete pump piston of conveying cylinder, its structure characteristic is: at the lip place of teflon piston or Expanded graphite piston layer (1), a metal spring (4) is arranged, between teflon piston or Expanded graphite piston layer (1) and rubber layer (2) is metal construction (3), and metal construction (3) has piston hole (5).