CN2156014Y

CN2156014Y - Tight lining teflon products

Info

Publication number: CN2156014Y
Application number: CN 92228352
Authority: CN
Inventors: 陈烈; 陈玉庭
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-17
Filing date: 1992-07-17
Publication date: 1994-02-16
Anticipated expiration: 2002-07-17

Abstract

The utility model relates to a tight lining teflon product, particularly a metal corrugated pipe tight lining teflon compensator. The utility model is characterized in that the utility model is only composed of a pipe container, a part casing steel element and a teflon lining which are felted tightly without a gap. The utility model overcomes the defects that the existing loose lining teflon product or the teflon product which is melted with the resin tight lining has lower temperature, nonresistant negative pressure (particularly under the higher temperature), etc.

Description

Tight lining teflon products

The utility model is about a kind of industrial antisepsis teflon lined goods, comprise pipe container and accessory teflon lined goods thereof such as straight tube, special pipe, elbow, three, four-way, pump valve body, the jar of being with arm, still, reaction pot, container, be meant metal shell corrugated expansion joint inner liner polytetrafluoroethylene goods especially.

Existing inner liner polytetrafluoroethylene (is called for short F ₄) lining goods great majority all are pine linings, promptly the shell steel part of pipe container and accessory is mostly and F ₄Lining is gapped.The disadvantage that said products exists is not anti-high positive and negative pressure, and all the more so under higher temperature, once the someone adopts at steel part and F for this reason ₄Filling F for example between the lining ₄₆Fillers such as (perfluoroethylene-propylene) and resin reach zero-clearance and tightly serve as a contrast purpose.But because these filler serviceability temperatures etc. are all not as good as F ₄, cause F ₄The technical functionality index of lining greatly reduces.

The purpose of the utility model is will overcome above-mentioned existing in prior technology defective and a kind of tight lining teflon goods are provided, and can reach anti-high operating temperature and high positive and negative pressure.

These tight lining teflon goods only are adjacent to bonding by pipe container and accessories case steel part thereof and teflon lined zero-clearance and form.

The teflon lined goods of above-mentioned tight lining can bear negative pressure, for example also can bear full negative pressure under the degree more than 200 in higher temperature, the positive forcing up the targets of bearing is just higher, almost is unlimited, the loose F that serves as a contrast or adopt the bonding tight lining of other filler of the serviceability temperature of tight lining teflon goods ₄The serviceability temperature scope of lining goods is wide.

Further setting of the present utility model be in the metal bellows compensator tight lining teflon, promptly be adjacent to the utility model formed that bonds and have more characteristic by metal bellows compensator shell steel part and teflon lined zero-clearance, the simple corrugated expansion joint of being made up of the metal steel part is obviously not corrosion-resistant, and widely used by F at corrosion-resistant field ₄Or/and rubber by the main pipeline compensator that constitutes then because its material is tired out the not high slightly malleation of ability and lower negative pressure slightly, the serviceability temperature scope is narrower and limited its use field.The utility model scheme has solved above-mentioned existing in prior technology deficiency well.

Further illustrate the utility model below in conjunction with description of drawings, provide embodiment simultaneously.

Fig. 1 is the tight lining teflon compensator structure of a metal bellows view.

Wherein, (1) metal shell steel part, (2) teflon lined, (3) adjusting rod.

As shown in the figure, metal shell steel part (1) comprises that with teflon lined (2) the lining flange almost is that tight lining stickup combines composition in the present embodiment, its manufacture method is as follows: at first the heating of teflon lined (2) layer thin plate is prefabricated into metal bellows and launches general bellows-shaped plate, after reeling, become the rotating cylinder shape, fill in the metal bellows that adjusting rod (3) is adjusted, after flicking, polytetrafluoroethylene (PTFE) thin plate rotating cylinder is attached to the wavy metal inside pipe wall, at this moment F ₄The rotating cylinder crimping also should have the juxtaposition layer so that expansion the time is not cracked, and a metal leaf is pressed F ₄Thin plate places F after generally making preformed ₄The rotating cylinder inner surface, then, pour into high temperature resistant powder serve as unsetting in soft mode, soft mode is extruded to the polytetrafluoroethylene (PTFE) rotating cylinder with the outer die of wavy metal pipe shell steel part formation in this, when high temperature resistant powder compresses compacting to circumferential F ₄The thin plate rotating cylinder applies about 5～10kgf/cm ²Pressure, after metal cover is added a cover at wavy metal pipe flange two ends, whole model is sent into sintering in the stove, whole sintering process carries out according to conventional method, after unload lid, gumming, take off paper tinsel and promptly get the tight lining teflon compensator of present embodiment goods metal bellows, these goods yet full negative pressure of ability under the temperature about 200 ℃ does not axially almost have expansion and contraction.

Claims

1, a kind of tight lining teflon goods is characterized in that only being adjacent to bonding by pipe container and accessories case steel part (1) thereof with teflon lined (2) zero-clearance forms.

2, according to the described tight lining teflon goods of claim 1, its feature shell steel part (1) is a metal bellows compensator shell steel part.