CN2395113Y

CN2395113Y - Seal filling for heat conductive oil valve

Info

Publication number: CN2395113Y
Application number: CN 99230438
Authority: CN
Inventors: 洪聪明
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-09
Filing date: 1999-09-09
Publication date: 2000-09-06
Anticipated expiration: 2009-09-09

Abstract

The utility model provides a seal filler for a heat conductive oil valve, which has a circular ring-shaped multilayer superposed structure. The utility model is formed by a multilayer graphite laminated layer 1 or the utility model is formed by the method that the multilayer graphite laminated layer 1 and a multilayer metal laminated layer 2 are superposed in an interphase way. The utility model has the characteristics of high temperature resistance, corrosion resistance, burn and seizure prevention, good self-lubricating property, etc., and has adequate mechanical physical property. The utility model is an ideal sealing filler for the present heat conductive oil valve. Meanwhile, the utility model is also suitable for the work under the condition of high temperature, high pressure, and corrosion, and can be used on a mechanical device requiring self-lubrication and the seal.

Description

Conduction oil valve seal bedding and padding

The utility model belongs to mechanical sealing technology, is specifically related to the improvement of the sealing bedding and padding of the special valve of a kind of conduction oil.

Existing conduction oil valve, such as stop valve, gate valve and ball valve etc., the temperature of the medium oil of being controlled, generally more than 300 ℃, its nominal pressure is more than 1.6Mpa, because its operating mode needs the specific condition of withstand high temperatures, high pressure over a long time, so in prior art, between the valve rod and valve gap of this class conduction oil valve, and between valve body and the valve gap, all adopt the rope form asbestos packing as the sealing bedding and padding.And said here asbestos packing, its structure is well-known, it is earlier to be made into rope form by asbestos yarn via weaving, again on the surface of made asbestos rope, coats one deck and finally is made into asbestos packing by graphite layer that powdered graphite constituted.The graphite packing of supplying on the market is the superimposed wreath of multi-turn coiling, just as the whole circle electric wire packing of city's confession.In conduction oil valve installation process, asbestos packing is blocked according to Len req, and then be coiled in the position that needs sealing.People are told in practice, this asbestos packing of prior art, because the leakiness of its woven fabric structure, with its stronger plasticity that is had, the asbestos packing that adopts in the plane engagement place of valve body and valve cover chamber particularly, because the misoperation of tightening clamping bolt, so that the asbestos packing pressurized is inhomogeneous and flow that cause is inconsistent, the leakage phenomenon that is caused happens occasionally, give environment, fire-fighting and personnel's life safety are brought serious threat, simultaneously, because its surperficial graphite layer and the adhesion between the asbestos rope and Adhesion force are all very fragile, thereby graphite layer very easily comes off from the asbestos rope surface, thereby causes the self-lubricating property of asbestos packing to reduce, and the valve rod rotating operation is obstructed, this not only makes operation consumption power increase, and can produce and kill and burn phenomenon, so that having increased the maintenance down time, the work that has influenced integral device is renderd a service.

The purpose of this utility model is to provide a kind of structure organization densification, and self-lubricating property is good, and high temperature resistant, corrosion-resistant, anti-kill and annular seal filler that have enough mechanical and physical performances is to overcome the deficiency of prior art.

Realize that the technological scheme that the purpose of this utility model is taked is, adopting banded graphite flake high temperature resistant, corrosion-resistant, that self-lubricating property is all suitable is base material, by the winding process coiling and molding, and makes via mold pressing.Be that the utility model is ring multilayer build-up shape, and form by stacked the closing of multilayer graphite flake.The utility model described above is that improve on its basis.Under nominal situation, it can satisfy the usage requirement that the conduction oil valve respectively seals the position fully.

In order to give the utility model higher intensity, more withstand voltagely (comprise pressure medium and mechanical pressure so that be more suitable for, especially mechanical pressure) the use at position, further improvement of the utility model point also is, adopts multilayer graphite flake layer alternate superimposed composition with the multilayer metal foil layer.Be the utility model between each layer of said multilayer graphite flake layer, with and the outer surface of cylindrical and endoporus, also be provided with layer of metal foil.The utility model after further improving, be specially adapted to the sealing of valve body and valve cover chamber, this is because it has added layer of metal foil, and obviously improved mechanical and physical performance, with respect to tightening the pressure that clamping bolt produces, have enough bearing capacities, thereby guarantee that the utility model can not produce breakage, collapse diffusing phenomenon under predetermined operating mode, this has also just improved sealability of the present utility model more effectively.

And the layer of metal foil that the utility model is taked is the Thin Stainless Steel lamella, or the copper foil layer, or the aluminum slice layer, or the signal bronze lamella.The preferred layer of metal foil of the utility model is the Thin Stainless Steel lamella.

Improvement via structure and shape described above, the Organizational Structure densification that the utility model had, self-lubricating property is good, corrosion-resistant, anti-ly kill, burnout-proof and have enough mechanical and physical performances and characteristics such as installation, maintenance is convenient, is conspicuous.Have obvious improvement and substantial characteristics than prior art.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is a plan view of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is that the utility model is by the alternate superimposed a kind of structure sectional view with the strip metal lamella of banded graphite flake layer;

Fig. 4 is the A portion enlarged view of Fig. 3;

Fig. 5 is for making the expansion schematic representation of described two kinds of belt flake layers before coiling of banded graphite flake layer and the alternate iterative structure of strip metal lamella.

See also Fig. 1,2,3,4,5, the utility model is ring multilayer build-up shape structure.It is to be formed by stacking by multilayer graphite flake layer 1, or is made up of multilayer graphite flake layer 1 and layer of metal foil 2 alternate superimposed institutes.And layer of metal foil 2 Thin Stainless Steel lamella preferably.

One of embodiment of the present utility model, see also Fig. 1,2, the thick graphite cake of 0.4mm that adopts Shandong graphite ore factory to produce, cut into the wide banded graphite flake of 15mm through cutter special, again according to the physical dimension (mainly being internal diameter and outside dimension) of stuffing box packing, on special purpose machinery, use mould to be wound into the needed semi-finished product that meet the ring multilayer build-up shape structure of design size, and, make it can not unclamp at initial winding point (inner circle) and final winding point (cylindrical place) the banded graphite flake of adhesive.Then the semi-finished product of making are placed on and deliver to compression and moulding on the press in the mould and make the utility model.

Embodiment's of the present utility model two, see also Fig. 4,5,6, the thick graphite cake of 0.4mm that adopts Shandong graphite ore factory to produce, cut into the wide banded graphite flake of 5mm through cutter special, simultaneously that 0.4mm is thick corrosion resistant plate is processed into the banded stainless steel thin slice of wide 5mm, carrying out both folded by Fig. 5 joins, then, on special purpose machinery, use mould to be wound into the needed semi-finished product that meet the superimposed shape structure of ring MULTILAYER COMPOSITE of design size, and at banded stainless steel thin slice coiling starting point (inner circle) and coiling maximal end point (cylindrical place), with stainless steel welding stick bar spot welding 3 points, make it can not unclamp.And then deliver to compression and moulding on the press and make the utility model.

Adopt the utility model device on the J41H-16DN50 valve, detect through the Changzhou product quality supervision and testing institute, its testing result shows: withstand voltagely do not find leakage phenomenon when 2.4Mpa, it is high temperature resistant, corrosion-resistant, selflubricating and mechanical and physical performance all meet the requirements.

Application area of the present utility model, the restriction that not described by this specification.

Claims

1, a kind of conduction oil valve seal bedding and padding is characterized in that, are ring multilayer build-up shape, and by multilayer graphite flake layer (1) superimposed composition.

2, conduction oil valve seal bedding and padding according to claim 1 is characterized in that, said multilayer graphite flake layer (1) each the layer between with and outer surface, also be provided with layer of metal foil (2).

3, conduction oil valve seal bedding and padding according to claim 1 is characterized in that, in said layer of metal foil (2), are the Thin Stainless Steel lamellas, or the copper foil layer, or the aluminum slice layer, or the signal bronze lamella.