CN206112075U - Combined packing ring - Google Patents

Abstract

The utility model relates to a combined packing ring, including carbon packing ring body, its characterized in that: including carbon packing ring body, its characterized in that: the up end and the lower terminal surface of carbon packing ring body are provided with upper and lower compound ring body respectively, the compound ring body of going up form by the ring of top -down superimposed packing in proper order, first, the 2nd carbon packing ring, lower compound ring body by from bottom to top in proper order superimposed packing ring, first, the 2nd carbon packing ring forms, and the density of the 2nd carbon packing ring encircles between the density of body between a carbon packing ring sum carbon packing, lies in comparing with prior art, the utility model has the advantages of the combined packing ring who has a density gradient that packing ring and carbon packing ring, the 2nd carbon packing ring and carbon packing ring body be common to be formed can guarantee that the whole of packing is closely knit even with lateral force to the sealing performance who packs has effectively been improved.

Description

Combined stuffing ring

Technical field

This utility model is related to airtight and watertight padding technical field, more particularly to a kind of combined stuffing ring.

Background technology

Packing ring be it is a kind of suitable for oil, chemical industry and some there is the environment of the strong corrosive medias such as soda acid, peace Mechanical seal product loaded on various slewings, reciprocating pump, valve etc..Carbon packing ring is common are, its structure annular in shape, To wind compacting by mould after the clipped processing of soft graphite to form, due to the material behavior of graphite have self lubricity it is good, Relatively convenient is wanted in corrosion-resistant the features such as, production and installation, is one of higher environment-friendly type airtight and watertight padding of current cost performance.Although stone The coefficient of friction of ink material is relatively low, works under the high environment of working condition requirement such as high intensity, high line number, still can produce wear and tear into And cause sealing to reduce, so as to cause leakage, shorten the service life of packing ring；Often find that graphite is filled out when changing packing ring Also there is the corrosion phenomena that weight differs in material ring premature deterioration, seal member surface of its contact, cause valve rod to corrode deformation, make Into larger economic loss.

The content of the invention

Technical problem to be solved in the utility model is to provide a kind of Stability Analysis of Structures for above-mentioned state of the art, The combined stuffing ring of wear resistant corrosion resistant.

This utility model solve the technical scheme that adopted of above-mentioned technical problem for：The combined stuffing ring, includes graphite Filler ring body, it is characterised in that：The upper surface and lower surface of the graphite packing ring body is respectively arranged with density level bands The upper and lower compound ring body of degree, described upper compound ring body by the packing ring, the first carbon packing ring being sequentially overlapped from top to bottom and Second carbon packing ring is constituted, and described lower compound ring body is by the packing ring, the first carbon packing ring being sequentially overlapped from bottom to top Constitute with the second carbon packing ring, and the density of the second carbon packing ring is between the first carbon packing ring and graphite packing ring body Density between.

Further, the outer cone of the middle part evagination that the side of the graphite packing ring body is made up of ramp and lower inclined plane Shape structure, the second carbon packing ring inwall in the upper and lower compound ring body make the inner conical structure for matching.By outer cone The matching connection of shape structure and inner conical structure, can cause graphite packing ring body and the second carbon packing ring to be completely embedded, close Envelope property is more preferable.

Preferably, the upper surface of the ramp and the graphite packing ring body is formed with angle α, and 110 °≤α≤ 120°。

Preferably, the angle α is 120 °.

Compared with prior art, the utility model has the advantage of packing ring is filled out with the first carbon packing ring, the second graphite The combined stuffing ring with density gradient that material ring and graphite packing ring body are collectively constituted, the upper of the combined stuffing ring are combined Ring body is improve in the compression process from top to bottom with lower compound ring body from bottom to top positioned at middle carbon packing ring sheet The lateral distending ability of body, the compression for both having avoided graphite packing ring body after filler is installed are insufficient, in turn ensure that filler Overall closely knit and lateral force is uniform, so as to effectively increase the sealing property of filler, strong with sealing, high pressure resistant, corrosion resistant The characteristics of corrosion is strong.

Description of the drawings

Structural representations of the Fig. 1 for this utility model embodiment；

Decomposition texture schematic diagrams of the Fig. 2 for Fig. 1.

Specific embodiment

This utility model is described in further detail below in conjunction with accompanying drawing embodiment.

As shown in Fig. 1～2, this combined stuffing ring includes graphite packing ring body 1, the upper end of graphite packing ring body 1 Face and lower surface are respectively arranged with the upper and lower compound ring body with density gradient, and upper compound ring body is by being sequentially overlapped from top to bottom Packing ring 2, the first carbon packing ring 3 and the second carbon packing ring 4 constitute, the density of the second carbon packing ring 4 is between first Between the density of carbon packing ring 3 and graphite packing ring body 1；Compound ring body ring body is by by the disk being sequentially overlapped from bottom to top down Root ring 2, the first carbon packing ring 3 and the second carbon packing ring 4 are constituted, and in the present embodiment, the density of the first carbon packing ring 3 is 1.8g/cm³, the density of the second carbon packing ring 4 is 1.6g/cm³, the density of graphite packing ring body 1 is 1.3g/cm³。

In order to be able to cause graphite packing ring body 1 and the second carbon packing ring 4 to be completely embedded, better tightness, side by The male-tapered structure of the middle part evagination of ramp 111 and the composition of lower inclined plane 112, the second graphite packing in upper and lower compound ring body 4 inwall of ring makes the inner conical structure for matching.Wherein, ramp 111 is formed with folder with the upper surface of graphite packing ring body 1 Angle α, and angle α is 120 °.

Before and after installation, the density of compressible filler is the material impact factor of this combined stuffing ring filler sealing property, filler When, centered on the best low-density carbon packing ring of expansion character respectively in Impact direction superposition, the first carbon packing ring 3 And outermost packing ring 2, by upper compound ring body from top to bottom with lower compound ring body in compression process from bottom to top In improve lateral distending ability positioned at middle graphite packing ring body, can radially after distending during filling compaction It is adjacent to axle surface to prevent medium leakage from reaching sealing effectiveness, has both avoided the compression of graphite packing ring body after filler is installed not Fully, in turn ensure that the entirety of filler is closely knit uniform with lateral force, as a kind of compressibility encapsulant, filling out after installation Material density tool is significantly improved, and leakage will not occur.

Claims (4)

1. a kind of combined stuffing ring, includes graphite packing ring body (1), it is characterised in that：The graphite packing ring body (1) Upper surface and lower surface be respectively arranged with the upper and lower compound ring body with density gradient, described upper compound ring body is by from upper And under the packing ring (2), the first carbon packing ring (3) and the second carbon packing ring (4) composition that are sequentially overlapped, it is described lower compound Ring body is made up of the packing ring (2), the first carbon packing ring (3) and the second carbon packing ring (4) being sequentially overlapped from bottom to top, and The density of the second carbon packing ring (4) is between the density of the first carbon packing ring (3) and graphite packing ring body (1).

2. combined stuffing ring according to claim 1, it is characterised in that：The side of the graphite packing ring body (1) by The male-tapered structure of the middle part evagination that ramp (111) and lower inclined plane (112) are constituted, second in the upper and lower compound ring body Carbon packing ring (4) inwall makes the inner conical structure for matching.

3. combined stuffing ring according to claim 2, it is characterised in that：The ramp (111) and the graphite packing The upper surface of ring body (1) is formed with angle α, and 110 °≤α≤120 °.

4. combined stuffing ring according to claim 3, it is characterised in that：The angle α is 120 °.