CN2177841Y

CN2177841Y - Sealing packing

Info

Publication number: CN2177841Y
Application number: CN 93246211
Authority: CN
Inventors: 茹春浩
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-11-30
Filing date: 1993-11-30
Publication date: 1994-09-21
Anticipated expiration: 2003-11-30

Abstract

The utility model relates to sealing filler for a sealing device, which has an expandable graphite packing base layer, and is characterized in that the surface of the packing base layer is adhered with a layer of reinforced carrier layers made of fibers, wire meshes, metal foils or organic films; the reinforced carrier layers carry a layer of corrosion inhibitor layers made of molybdate, tungstate, hydrogen phosphate, polyphosphate, zinc salt, or zinc powders or the composition of the molybdate, the tungstate, the hydrogen phosphate, the polyphosphate, the zinc salt, and zinc powders; the sealing filler can adapt to sealing requirements of various different operating conditions, and moreover, the corrosion of the sealed-in unit is comparatively small.

Description

Sealing packing

The utility model relates to laminar product, particularly stuffing box packing.

Pump in the equipment of industrial product, pipe, valve, still, jar, tower etc. all have very high requirement to sealing, in order to prevent the leakage of device junction place gas, liquid, usually adopt the stuffing box packing of cotton, fiber crops, asbestos, rubber, metal or their composite as the device junction place, but, therefore can not adapt to the needs of various different operating modes sealings because above-mentioned filler is difficult to take into account simultaneously at intensity, temperature, resistant to chemical media, aspect such as corrosion-resistant.Occurred a kind of new stuffing box packing---expanded graphite packing in recent years, this filler has good impermeability to gas, liquid, can adapt to the seal request of various different operating modes.Described expanded graphite packing generates expanded graphite worm shape particle by the very high graphite of carbon content earlier after the sulfuric acid expanding treatment, again above-mentioned material is pressed into and is cut into the inner residual impurity that has after the acidification of packing filling that the strip packing makes with said method behind the sheet material, as oxysulfide, acid ion etc., these impurity can be to water-tight equipment generation corrosion in various degree, the working life of reducing equipment in the using process of packing filling.For this reason, known technology adopts the mixed mode of simple machinery to mix corrosion inhibitor in expanded graphite worm shape particulate material, utilize in the corrosion inhibitor and acid impurities reduce packing filling to the corrosion of equipment but since the density of corrosion inhibitor generally at 3-5g/cm3---and expanded graphite worm shape Particle Density has only 0.1g/cm3, and both density differs 300-500 doubly.Therefore with simple machinery type above-mentioned two kinds of materials are mixed, corrosion inhibitor is easy to fall to the material bottom and separates out; Sneak on a small quantity in the above-mentioned material corrosion inhibitor also because of the expanded graphite packing to gas, the impermeability of liquid and be difficult to the permanently effective slow corrosive action of performance, so known technology is not resolved the etching problem of expanded graphite packing to water-tight equipment.Moreover after the corrosion inhibitor powder mixes expanded graphite worm shape particle, greatly reduce the interparticle combination force of expanded graphite worm shape, and mechanical agitation attenuates expanded graphite worm shape particle fragmentation, and with the expanded graphite packing filling that above-mentioned material and method are pressed into, its intensity will descend at double.

The purpose of this utility model will provide good seal performance exactly, and is little to equipment corrosion, intensity height, the stuffing box packing of long service life.

Task of the present utility model is finished as follows.

A kind of stuffing box packing has expanded graphite packing basic unit, and its characteristics are that described packing substrate surface is stained with one deck fiber reinforcement carrier layer, and described enhancing carrier layer is loaded with the corrosion inhibitor layer.

A kind of stuffing box packing has expanded graphite packing basic unit, and its characteristics are that described packing substrate surface is stained with the layer of metal silk screen or metal foil strengthens carrier layer, and described enhancing carrier layer surface roll is pressed with the corrosion inhibitor layer.

A kind of stuffing box packing has the swollen graphite plate foundation layer of using, and its characteristics are that described packing substrate surface is stained with one deck organic film and strengthens carrier layer, and described enhancing carrier layer table evenly is coated with the corrosion inhibitor layer.

Expanded graphite packing filling of the present utility model is owing to be stained with one deck fiber reinforcement carrier layer or wire gaze or metal foil or organic film enhancing carrier layer in the packing substrate surface; protection and humidification are played in expanded graphite packing basic unit; evenly be loaded with the corrosion inhibitor layer on the described carrier layer; the two-way function for a long time of corrosive impurity in this layer corrosion inhibitor and the packing; make packing reduce to minimum, and do not influence the sealing function of expanded graphite root equipment to the corrosive action of seal arrangement.Again because the structure of the utility model stuffing box packing does not destroy the structure of original expanded graphite packing basic unit, therefore can not reduce the intensity of expanded graphite packing basic unit or the working life of shortening packing, strengthen intensity and the working life that carrier layer has improved packing owing to having on the contrary.

Below with reference to accompanying drawing the utility model is described in further detail.

Fig. 1 is the utility model stuffing box packing product configurations schematic representation.

Fig. 2 is the organigram of the utility model stuffing box packing like product.

Fig. 3 is the organigram of another like product of the utility model stuffing box packing.

With reference to Fig. 1, expanded graphite packing basic unit 1 surface adhesion has one deck fiber-reinforced layer 2, and described fiber-reinforced layer is made by natural fibre such as carbon fiber, artificial fiber or cotton, fiber crops or their blend fiber.Described fiber reinforcement carrier layer surface evenly is coated with the corrosion inhibitor layer 3 that molybdate or tungstates or heteropoly tungstic acid salt or hydrophosphate or polyphosphate or zinc salt or zinc powder or their composition etc. have had purification membrane, dignified film and cathodic protection effect, and roll-in is sticking real then.Described fiber reinforcement carrier layer can also be immersed in the solution that is mixed with by above-mentioned corrosion inhibitor behind the corrosion inhibitor that absorbs some in advance again at surface adhesion roll-in one deck corrosion inhibitor, can prolong and strengthen corrosion inhibition like this.Improve the quality of packing product.Consult Fig. 2; wire gaze that expanded graphite packing basic unit 1 surface adhesion one deck is made by Stainless Steel Wire, nickel wire, copper wire, zinc silk or metal alloy wires or metal foil strengthen carrier layer 4, and described enhancing carrier layer surface roll is pressed with the corrosion inhibitor layer 3 that has been had purification membrane, dignified film and cathodic protection effect by molybdate or tungstates or tungsten heteroacid salt or hydrophosphate or polyphosphate or zinc salt or zinc powder or their composition etc.Consult Fig. 3, expanded graphite packing basic unit 1 surface scribbles one deck organic film and strengthens carrier layer 5, and described enhancing carrier layer surface evenly is coated with the corrosion inhibitor layer 3 that one deck is made up of molybdate or tungstates or tungsten heteroacid salt or hydrophosphate or polyphosphate or zinc salt or zinc powder or their composition.

Claims

1, a kind of stuffing box packing has expanded graphite packing basic unit (1), it is characterized in that described packing substrate surface is stained with one deck fiber reinforcement carrier layer (2), and described carrier layer is loaded with corrosion inhibitor layer (3).

2, a kind of stuffing box packing has expanded graphite packing basic unit (1), it is characterized in that described packing substrate surface is stained with the layer of metal silk screen or metal foil strengthens carrier layer (4), and described enhancing carrier layer surface roll is pressed with corrosion inhibitor layer (3).

3, a kind of stuffing box packing has expanded graphite packing basic unit (1), it is characterized in that described packing substrate surface is stained with one deck organic film and strengthens carrier layer (5), and described enhancing carrier layer surface evenly is coated with corrosion inhibitor layer (3).